CN101217840B - Color controlling method of LED light source system - Google Patents

Abstract

The invention provides a colour control method of an LED light source system. When the temperature of the LED grain of the LED light source system is changed, a wavelength offset phenomenon which is caused by the temperature change is compensated by a feedback controller according to the voltage reduction change or current change of the LED, thus precisely controlling the light which is emitted by the LED. The colour control method of the LED light source system comprises a prepositive detection stage and a feedback control stage; the prepositive detection stage is used for detecting the colour signals and chroma signals which are corresponding to the voltage reduction signals or current signals of each LED module; the feedback control stage executes the signal compensation disposal in order to precisely control the light emitted by the LED light source system by matching the voltage reduction signals or the current signals which are generated in the prepositive detection stage and the corresponding colour signals and chroma signals according to the voltage reduction change or the current change.

Description

The color control method of LED light source system

Technical field

The present invention refers to a kind of color control method of LED light source system especially relevant for a kind of color control method.

Background technology

Because light-emitting diode (Light-Emitting Diode, LED) has the little advantage of power saving and volume, again because the production technology maturation of high brightness LED, make light-emitting diode be widely used in the field of luminous demonstration or illumination, the direction auxiliary lamp that comprises automobile, electrical lighting fields such as the photoflash lamp of elementary digital camera, the backlight of liquid crystal indicator is also gradually by traditional cold cathode fluorescent lamp (ColdCathode Fluorescent Lamp in addition, CCFL) or the outer cathode fluorescent tube (External Electrode Fluorescent Lamp EEFL) replaces with light-emitting diode.

Please refer to Fig. 1, Fig. 1 shows the block schematic diagram of a known LED light source system 100.LED light source system 100 comprises a light-emitting diode (LED) module 101, a LED driving circuit 111, a color transducer 180, reaches a controller 150.LED driving circuit 111 is in order to provide a drive signal to light-emitting diode (LED) module 101, the light that color sensor 180 detection light-emitting diode (LED) modules 101 are sent is to produce a feedback signal, controller 150 produces a control signal according to feedback signal, and LED driving circuit 111 is promptly according to control signal modulation drive signal.Yet, when the working temperature of the LED crystal particle of light-emitting diode (LED) module 101 rises, the light wavelength that it sent also can be offset thereupon, this is known wavelength shift phenomenon (wavelength shift) or the color shift phenomenon (colorshift) that causes because of variations in temperature, and known LED light source system 100 can't be in order to compensate the wavelength shift phenomenon that causes because of variations in temperature, so, when the working temperature of LED crystal particle raises, also just poor more to the control accuracy of its light that sends.

Summary of the invention

According to embodiments of the invention, it discloses a kind of color control method of LED light source system, in order to the light that accurate control one LED light source system is sent, this LED light source system comprises a red-light LED module, a green light LED module, reaches a blue-ray LED module.

This color control method comprises: supply one first drive current to the red-light LED module in one first period; In the very first time of first period, one first pressure drop according to the red-light LED module produces one first feedback voltage that corresponds to the red-light LED module, reach and detect the light that the red-light LED module is sent, correspond to one first red signal light, one first green optical signal, one first blue light signal, and one first group of CIE (Commission Internationale de l ' Eclairage, Commission Internationale De L'Eclairage) tristimulus values of red-light LED module with generation; In one second time of first period, one second pressure drop according to the red-light LED module produces one second feedback voltage that corresponds to the red-light LED module, and detect the light that the red-light LED module is sent, correspond to one second red signal light, one second green optical signal, one second blue light signal, and one second group of CIE tristimulus values of red-light LED module with generation; Supply one second drive current to the green light LED module in one second period; In the very first time of second period, one first pressure drop according to the green light LED module produces one first feedback voltage that corresponds to the green light LED module, and detect the light that the green light LED module is sent, correspond to one first red signal light, one first green optical signal, one first blue light signal, and one first group of CIE tristimulus values of green light LED module with generation; In one second time of second period, one second pressure drop according to the green light LED module produces one second feedback voltage that corresponds to the green light LED module, and detect the light that the green light LED module is sent, correspond to one second red signal light, one second green optical signal, one second blue light signal, and one second group of CIE tristimulus values of green light LED module with generation; Supply one the 3rd drive current to the blue-ray LED module in one the 3rd period; In the very first time of the 3rd period, one first pressure drop according to the blue-ray LED module produces one first feedback voltage that corresponds to the blue-ray LED module, and detect the light that the blue-ray LED module is sent, correspond to one first red signal light, one first green optical signal, one first blue light signal, and one first group of CIE tristimulus values of blue-ray LED module with generation; In one second time of the 3rd period, one second pressure drop according to the blue-ray LED module produces one second feedback voltage that corresponds to the blue-ray LED module, and detect the light that the blue-ray LED module is sent, correspond to one second red signal light, one second green optical signal, one second blue light signal, and one second group of CIE tristimulus values of blue-ray LED module with generation; Supply first drive current to the red-light LED module, supply second drive current, and supply the 3rd drive current is to the blue-ray LED module to the green light LED module; One the 3rd pressure drop according to the red-light LED module produces one the 3rd feedback voltage that corresponds to the red-light LED module; According to the 3rd feedback voltage that corresponds to the red-light LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the red-light LED module; According to the 3rd feedback voltage that corresponds to the red-light LED module, first feedback voltage, second feedback voltage, first red signal light, first green optical signal, the first blue light signal, second red signal light, second green optical signal, and the second blue light signal, produce one the 3rd red signal light that corresponds to the red-light LED module, one the 3rd green optical signal, and one the 3rd blue light signal; One the 3rd pressure drop according to the green light LED module produces one the 3rd feedback voltage that corresponds to the green light LED module; According to the 3rd feedback voltage that corresponds to the green light LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the green light LED module; According to the 3rd feedback voltage that corresponds to the green light LED module, first feedback voltage, second feedback voltage, first red signal light, first green optical signal, the first blue light signal, second red signal light, second green optical signal, and the second blue light signal, produce one the 3rd red signal light that corresponds to the green light LED module, one the 3rd green optical signal, and one the 3rd blue light signal; One the 3rd pressure drop according to the blue-ray LED module produces one the 3rd feedback voltage that corresponds to the blue-ray LED module; According to the 3rd feedback voltage that corresponds to the blue-ray LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the blue-ray LED module; According to the 3rd feedback voltage of blue-ray LED module, first feedback voltage, second feedback voltage, first red signal light, first green optical signal, the first blue light signal, second red signal light, second green optical signal, and the second blue light signal, produce one the 3rd red signal light, one the 3rd green optical signal, and one the 3rd blue light signal of blue-ray LED module; According to the 3rd group of CIE tristimulus values that corresponds to the red-light LED module, the 3rd red signal light, the 3rd green optical signal, the 3rd blue light signal, correspond to the 3rd group of CIE tristimulus values, the 3rd red signal light, the 3rd green optical signal, the 3rd blue light signal of green light LED module and correspond to the 3rd group of CIE tristimulus values, the 3rd red signal light, the 3rd green optical signal, the 3rd blue light signal of blue-ray LED module, calculate one first coefficient matrix; According to the one group of default CIE tristimulus values and first coefficient matrix, calculate one first control signal, one second control signal, reach one the 3rd control signal; And according to the first control signal modulation, first drive current, according to the second control signal modulation, second drive current, and according to the 3rd control signal modulation the 3rd drive current; Wherein first period, second period and the 3rd period do not overlap each other.

According to embodiments of the invention, it also discloses a kind of color control method of LED light source system, in order to the light that accurate control one LED light source system is sent, this LED light source system comprises a red-light LED module, a green light LED module, reaches a blue-ray LED module.

This color control method comprises: supply one first driving voltage to the red-light LED module in one first period; In the very first time of first period, one first electric current according to the red-light LED module of flowing through produces one first feedback voltage that corresponds to the red-light LED module, and detect the light that the red-light LED module is sent, correspond to one first group of CIE tristimulus values of red-light LED module with generation; In one second time of first period, one second electric current according to the red-light LED module of flowing through produces one second feedback voltage that corresponds to the red-light LED module, and detect the light that the red-light LED module is sent, correspond to one second group of CIE tristimulus values of red-light LED module with generation; Supply one second driving voltage to the green light LED module in one second period; In the very first time of second period, one first electric current according to the green light LED module of flowing through produces one first feedback voltage that corresponds to the green light LED module, and detect the light that the green light LED module is sent, correspond to one first group of CIE tristimulus values of green light LED module with generation; In one second time of second period, one second electric current according to the green light LED module of flowing through produces one second feedback voltage that corresponds to the green light LED module, and detect the light that the green light LED module is sent, correspond to one second group of CIE tristimulus values of green light LED module with generation; Supply one the 3rd driving voltage to the blue-ray LED module in one the 3rd period; In the very first time of the 3rd period, one first electric current according to the blue-ray LED module of flowing through produces one first feedback voltage that corresponds to the blue-ray LED module, and detect the light that the blue-ray LED module is sent, correspond to one first group of CIE tristimulus values of blue-ray LED module with generation; In one second time of the 3rd period, one second electric current according to the blue-ray LED module of flowing through produces one second feedback voltage that corresponds to the blue-ray LED module, and detect the light that the blue-ray LED module is sent, correspond to one second group of CIE tristimulus values of blue-ray LED module with generation; Supply first driving voltage to the red-light LED module, supply second driving voltage, and supply the 3rd driving voltage is to the blue-ray LED module to the green light LED module; One the 3rd electric current according to the red-light LED module of flowing through produces one the 3rd feedback voltage that corresponds to the red-light LED module; According to the 3rd feedback voltage that corresponds to the red-light LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the red-light LED module; One the 3rd electric current according to the green light LED module produces one the 3rd feedback voltage that corresponds to the green light LED module; According to the 3rd feedback voltage that corresponds to the green light LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the green light LED module; One the 3rd electric current according to the blue-ray LED module of flowing through produces one the 3rd feedback voltage that corresponds to the blue-ray LED module; According to the 3rd feedback voltage that corresponds to the blue-ray LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the blue-ray LED module; According to the 3rd group of CIE tristimulus values that corresponds to the red-light LED module, the 3rd group of CIE tristimulus values that corresponds to the green light LED module, the 3rd group of CIE tristimulus values that corresponds to the blue-ray LED module, and one group of default CIE tristimulus values, calculate one first work period control signal, one second work period control signal, and one the 3rd work period control signal; And according to first work period control signal modulation first driving voltage, according to second work period control signal modulation second driving voltage, and according to the 3rd work period control signal modulation the 3rd driving voltage; Wherein first period, second period and the 3rd period do not overlap each other.

According to embodiments of the invention, it also discloses a kind of color control method of LED light source system, in order to the light that accurate control one LED light source system is sent, this LED light source system comprises a red-light LED module, a green light LED module, reaches a blue-ray LED module.

This color control method comprises: supply one first drive current to the red-light LED module in one first period; In the very first time of first period, one first pressure drop according to the red-light LED module produces one first feedback voltage that corresponds to the red-light LED module, and detect the light that the red-light LED module is sent, correspond to one first group of CIE tristimulus values of red-light LED module with generation; In one second time of first period, one second pressure drop according to the red-light LED module produces one second feedback voltage that corresponds to the red-light LED module, and detect the light that the red-light LED module is sent, correspond to one second group of CIE tristimulus values of red-light LED module with generation; Supply one second drive current to the green light LED module in one second period; In the very first time of second period, one first pressure drop according to the green light LED module produces one first feedback voltage that corresponds to the green light LED module, and detect the light that the green light LED module is sent, correspond to one first group of CIE tristimulus values of green light LED module with generation; In one second time of second period, one second pressure drop according to the green light LED module produces one second feedback voltage that corresponds to the green light LED module, and detect the light that the green light LED module is sent, correspond to one second group of CIE tristimulus values of green light LED module with generation; Supply one the 3rd drive current to the blue-ray LED module in one the 3rd period; In the very first time of the 3rd period, one first pressure drop according to the blue-ray LED module produces one first feedback voltage that corresponds to the blue-ray LED module, and detect the light that the blue-ray LED module is sent, correspond to one first group of CIE tristimulus values of blue-ray LED module with generation; In one second time of the 3rd period, one second pressure drop according to the blue-ray LED module produces one second feedback voltage that corresponds to the blue-ray LED module, and detect the light that the blue-ray LED module is sent, correspond to one second group of CIE tristimulus values of blue-ray LED module with generation; Supply first drive current to the red-light LED module, supply second drive current, and supply the 3rd drive current is to the blue-ray LED module to the green light LED module; One the 3rd pressure drop according to the red-light LED module produces one the 3rd feedback voltage that corresponds to the red-light LED module; According to the 3rd feedback voltage that corresponds to the red-light LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the red-light LED module; One the 3rd pressure drop according to the green light LED module produces one the 3rd feedback voltage that corresponds to the green light LED module; According to the 3rd feedback voltage that corresponds to the green light LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the green light LED module; One the 3rd pressure drop according to the blue-ray LED module produces one the 3rd feedback voltage that corresponds to the blue-ray LED module; According to the 3rd feedback voltage that corresponds to the blue-ray LED module, first feedback voltage, second feedback voltage, first group of CIE tristimulus values, and second group of CIE tristimulus values, produce one the 3rd group of CIE tristimulus values that corresponds to the blue-ray LED module; According to the 3rd group of CIE tristimulus values that corresponds to the red-light LED module, the 3rd group of CIE tristimulus values that corresponds to the green light LED module, the 3rd group of CIE tristimulus values that corresponds to the blue-ray LED module, and one group of default CIE tristimulus values, calculate one first work period control signal, one second work period control signal, and one the 3rd work period control signal; And according to first work period control signal modulation first drive current, according to second work period control signal modulation second drive current, and according to the 3rd work period control signal modulation the 3rd drive current; Wherein first period, second period and the 3rd period do not overlap each other.

Description of drawings

Fig. 1 shows the block schematic diagram of a known LED light source system;

Fig. 2 shows the block schematic diagram according to the LED light source system of the tool color controlling mechanism of first embodiment of the invention;

Fig. 3 shows the block schematic diagram according to the LED light source system of the tool color controlling mechanism of second embodiment of the invention;

Fig. 4 to Fig. 6 shows the flow chart according to the color control method of the LED light source system of Fig. 2;

Fig. 7 and Fig. 8 show the flow chart according to the color control method of the LED light source system of Fig. 3;

Fig. 9 shows the block schematic diagram according to the LED light source system of the tool color controlling mechanism of third embodiment of the invention;

Figure 10 and Figure 11 show the flow chart according to the color control method of the LED light source system of Fig. 9.

The main element symbol description:

100,200,300,900 LED light source systems

101 light-emitting diode (LED) modules

111 LED driving circuit

150 controllers

180 color sensors

201,301,901 red-light LED modules

202,302,902 green light LED modules

203,303,903 blue-ray LED modules

211,311,911 red-light LED drive circuits

212,312,912 green light LED drive circuits

213,313,913 blue-ray LED drive circuits

215,315,915 first signal amplifiers

216,221,226,316, operational amplifier

321、326、916、921、

926

220,320,920 secondary signal amplifiers

225,325,925 the 3rd signal amplifiers

231,931 first differential amplifiers

232,933 second differential amplifiers

233,933 the 3rd differential amplifiers

250,350,950 delicolor controllers

255,355,955 signal processors

260 matrix multipliers

261 first comparators

262 second comparators

263 the 3rd comparators

271,371,971 first pulse wave width modulation signal generators

272,372,972 second pulse wave width modulation signal generators

273,373,973 the 3rd pulse wave width modulation signal generators

280 color sensors

290,390,990 chromascopes

Ir first drive current

Ig second drive current

Ib the 3rd drive current

Rr first resistance

Rg second resistance

Rb the 3rd resistance

Rr1, Rr2, Rg1, Rg resistance

2、Rb1、Rb2

S401-S449, step

S501-S537、

S901-S937

The Sr red signal light

The Sg green optical signal

Sb blue light signal

Vr first driving voltage

Vg second driving voltage

Vb the 3rd driving voltage

X, Y, Z CIE tristimulus values

Embodiment

For making the present invention more apparent and understandable, hereinafter comply with the color control method of LED light source system of the present invention, cooperate appended graphic elaborating especially exemplified by embodiment, but the scope that the embodiment that is provided is not contained in order to restriction the present invention, carry out precedence and the method flow number of steps is more non-in order to limit it, any execution flow process that is reconfigured by method step, the method with impartial effect that produces is all the scope that the present invention is contained.

Please refer to Fig. 2, Fig. 2 shows the block schematic diagram according to the LED light source system 200 of the tool color controlling mechanism of first embodiment of the invention.LED light source system 200 comprises a red-light LED module 201, one green light LED module 202, one blue-ray LED module 203, one red-light LED drive circuit 211, one green light LED drive circuit 212, one blue-ray LED drive circuit 213, one first signal amplifier 215, one secondary signal amplifier 220, one the 3rd signal amplifier 225, one first differential amplifier 231, one second differential amplifier 232, one the 3rd differential amplifier 233, one color controller 250, an and color transducer 280.Red-light LED module 201, green light LED module 202, and blue-ray LED module 203 comprise a string at least light-emitting diode respectively, each string light-emitting diode comprises at least one light-emitting diode.The delicolor controller 250 of LED light source system 200 can be coupled in a chromascope 290, chromascope 290 is in order to detect the light that red-light LED module 201, green light LED module 202 or blue-ray LED module 203 are sent, producing one group of CIE tristimulus values X, Y, and Z, and present CIE tristimulus values X, Y, and Z to delicolor controller 250.

Red-light LED drive circuit 211 is coupled in red-light LED module 201, is a driven with current sources circuit, in order to provide one first drive current Ir to red-light LED module 201.Green light LED drive circuit 212 is coupled in green light LED module 202, is a driven with current sources circuit, in order to provide one second drive current Ig to green light LED module 202.Blue-ray LED drive circuit 213 is coupled in blue-ray LED module 203, is a driven with current sources circuit, in order to provide one the 3rd drive current Ib to blue-ray LED module 203.

First differential amplifier 231 is coupled in red-light LED module 201, in order to one first pressure drop of execution red-light LED module 201 and the differential processing and amplifying of one first reference voltage Vref r, to produce one first differential voltage.First signal amplifier 215 is coupled in first differential amplifier 231, in order to carry out the signal processing and amplifying of first differential voltage, to produce one first feedback voltage.Second differential amplifier 232 is coupled in green light LED module 202, in order to one second pressure drop of execution green light LED module 202 and the differential processing and amplifying of one second reference voltage Vref g, to produce one second differential voltage.Secondary signal amplifier 220 is coupled in second differential amplifier 232, in order to carry out the signal processing and amplifying of second differential voltage, to produce one second feedback voltage.The 3rd differential amplifier 233 is coupled in blue-ray LED module 203, in order to one the 3rd pressure drop of execution blue-ray LED module 203 and the differential processing and amplifying of one the 3rd reference voltage Vref b, to produce one the 3rd differential voltage.The 3rd signal amplifier 225 is coupled in the 3rd differential amplifier 233, in order to carry out the signal processing and amplifying of the 3rd differential voltage, to produce one the 3rd feedback voltage.

First signal amplifier 215 can be by an operational amplifier 216, a resistance R r1, reach a resistance R r2, a noninverting amplifying circuit that is combined.Secondary signal amplifier 220 can be by an operational amplifier 221, a resistance R g1, reach a resistance R g2, a noninverting amplifying circuit that is combined.The 3rd signal amplifier 225 can be by an operational amplifier 226, a resistance R b1, reach a resistance R b2, a noninverting amplifying circuit that is combined.In one embodiment, can omit first signal amplifier 215, secondary signal amplifier 220, and the 3rd signal amplifier 225, and directly with first, second, and the 3rd differential voltage respectively as first, second, and the 3rd feedback voltage.In another embodiment, can omit first differential amplifier 231, second differential amplifier 232, reach the 3rd differential amplifier 233, and with first signal amplifier 215, secondary signal amplifier 220, and the 3rd signal amplifier 225 be coupled directly to red-light LED module 201, green light LED module 202, and blue-ray LED module 203 respectively, with direct execution first, second, and the signal processing and amplifying of the 3rd pressure drop and produce respectively first, second, and the 3rd feedback voltage.

Color sensor 280 is coupled in delicolor controller 250, in order to detect the light that red-light LED module 201, green light LED module 202 or blue-ray LED module 203 are sent, producing at least one red signal light Sr, at least one green optical signal Sg, and at least one blue light signal Sb, and with red signal light Sr, green optical signal Sg, and blue light signal Sb export delicolor controller 250 to.Delicolor controller 250 comprises a signal processor 255, a matrix multiplier 260, one first comparator 261, one second comparator 262, one the 3rd comparator 263, one first pulse wave width modulation signal generator 271, one second pulse wave width modulation signal generator 272, reaches one the 3rd pulse wave width modulation signal generator 273.

Signal processor 255 is coupled in first signal amplifier 215, secondary signal amplifier 220, the 3rd signal amplifier 225, color sensor 280, reaches chromascope 290, in order to according to first feedback voltage, second feedback voltage, the 3rd feedback voltage, red signal light Sr, green optical signal Sg, blue light signal Sb, and CIE tristimulus values X, Y, and Z, carry out signal processing to produce a coefficient matrix.Matrix multiplier 260 is coupled in signal processor 255, in order to according to coefficient matrix and one group default CIE tristimulus values Xpreset, Ypreset, and Zpreset carry out matrix multiplication and handle, to produce one first control signal Rc, one second control signal Gc, and one the 3rd control signal Bc.In another embodiment, matrix multiplier 260 can be integrated in signal processor 255, can carry out signal processing with the direct generation first control signal Rc, the second control signal Gc, and the 3rd control signal Bc by signal processor 255.First comparator 261 is coupled in matrix multiplier 260, in order to compare the first control signal Rc and a corresponding red signal light Sr, to produce one first work period control signal Pr.Second comparator 262 is coupled in matrix multiplier 260, in order to compare the second control signal Gc and a corresponding green optical signal Sg, to produce one second work period control signal Pg.The 3rd comparator 263 is coupled in matrix multiplier 260, in order to compare the 3rd a control signal Bc and a corresponding blue light signal Sb, to produce one the 3rd work period control signal Pb.

The first pulse wave width modulation signal generator 271 is coupled between first comparator 261 and the red-light LED drive circuit 211, in order to work period according to the first work period control signal Pr modulation, one first pulse wave width modulation signal, and the output first pulse wave width modulation signal is to red-light LED drive circuit 211, with the modulation first drive current Ir.The second pulse wave width modulation signal generator 272 is coupled between second comparator 262 and the green light LED drive circuit 212, in order to work period according to the second work period control signal Pg modulation, one second pulse wave width modulation signal, and the output second pulse wave width modulation signal is to green light LED drive circuit 212, with the modulation second drive current Ig.The 3rd pulse wave width modulation signal generator 273 is coupled between the 3rd comparator 263 and the blue-ray LED drive circuit 213, in order to work period according to the 3rd work period control signal Pb modulation 1 the 3rd pulse wave width modulation signal, and output the 3rd pulse wave width modulation signal is to blue-ray LED drive circuit 213, with modulation the 3rd drive current Ib.

In the course of work of LED light source system 200, the optical wavelength of the light that is sent when ruddiness led module 201, green light LED module 202 or blue-ray LED module 203, when causing the optical wavelength change because of variations in temperature, first, second or the 3rd feedback voltage also can change thereupon, handle the light that is sent in order to accurate control red-light LED module 201, green light LED module 202 or blue-ray LED module 203 so just carry out signal compensation according to first, second or the 3rd feedback voltage.The details operation principle of LED light source system 200 is illustrated in color control method described later.

Please refer to Fig. 3, Fig. 3 shows the block schematic diagram according to the LED light source system 300 of the tool color controlling mechanism of second embodiment of the invention.LED light source system 300 comprises a red-light LED module 301, a green light LED module 302, a blue-ray LED module 303, one first resistance R r, one second resistance R g, one the 3rd resistance R b, a red-light LED drive circuit 311, a green light LED drive circuit 312, a blue-ray LED drive circuit 313, one first signal amplifier 315, a secondary signal amplifier 320, one the 3rd signal amplifier 325, reaches a color controller 350.Red-light LED module 301, green light LED module 302, and blue-ray LED module 303 comprise a string at least light-emitting diode respectively, each string light-emitting diode comprises at least one light-emitting diode.The delicolor controller 350 of LED light source system 300 can be coupled in a chromascope 390, chromascope 390 is in order to detect the light that red-light LED module 301, green light LED module 302 or blue-ray LED module 303 are sent, producing one group of CIE tristimulus values X, Y, and Z, and present CIE tristimulus values X, Y, and Z to delicolor controller 350.

Red-light LED drive circuit 311 is coupled in red-light LED module 301, is a voltage source drive circuit, in order to provide one first driving voltage Vr to red-light LED module 301.Green light LED drive circuit 312 is coupled in green light LED module 302, is a voltage source drive circuit, in order to provide one second driving voltage Vg to green light LED module 302.Blue-ray LED drive circuit 313 is coupled in blue-ray LED module 303, is a voltage source drive circuit, in order to provide one the 3rd driving voltage Vb to blue-ray LED module 303.The first resistance R r is coupled in red-light LED module 301, is proportional to one first pressure drop of the electric current of the red-light LED module 301 of flowing through in order to generation.The second resistance R g is coupled in green light LED module 302, is proportional to one second pressure drop of the electric current of the green light LED module 302 of flowing through in order to generation.The 3rd resistance R b is coupled in blue-ray LED module 303, is proportional to one the 3rd pressure drop of the electric current of the blue-ray LED module 303 of flowing through in order to generation.

First signal amplifier 315 is coupled in the first resistance R r and red-light LED module 301, in order to carry out the signal processing and amplifying of first pressure drop, to produce one first feedback voltage, first signal amplifier 315 can be by an operational amplifier 316, a resistance R r1, reach a resistance R r2, a noninverting amplifying circuit that is combined.Secondary signal amplifier 320 is coupled in the second resistance R g and green light LED module 302, in order to carry out the signal processing and amplifying of second pressure drop, to produce one second feedback voltage, secondary signal amplifier 320 can be by an operational amplifier 321, a resistance R g1, reach a resistance R g2, a noninverting amplifying circuit that is combined.The 3rd signal amplifier 325 is coupled in the 3rd resistance R b and blue-ray LED module 303, in order to carry out the signal processing and amplifying of the 3rd pressure drop, to produce one the 3rd feedback voltage, the 3rd signal amplifier 325 can be by an operational amplifier 326, a resistance R b1, reach a resistance R b2, a noninverting amplifying circuit that is combined.

Delicolor controller 350 comprises a signal processor 355, one first pulse wave width modulation signal generator 371, one second pulse wave width modulation signal generator 372, reaches one the 3rd pulse wave width modulation signal generator 373.Signal processor 355 is coupled in first signal amplifier 315, secondary signal amplifier 320, the 3rd signal amplifier 325, reaches chromascope 390, in order to according to first feedback voltage, second feedback voltage, the 3rd feedback voltage, CIE tristimulus values X, Y, and Z, and one group of default CIE tristimulus values Xpreset, Ypreset, and Zpreset, carry out signal processing to produce one first work period control signal Pr, one second work period control signal Pg, and one the 3rd work period control signal Pb.The first pulse wave width modulation signal generator 371 is coupled between signal processor 355 and the red-light LED drive circuit 311, in order to work period according to the first work period control signal Pr modulation, one first pulse wave width modulation signal, and the output first pulse wave width modulation signal is to red-light LED drive circuit 311, with the modulation first driving voltage Vr.The second pulse wave width modulation signal generator 372 is coupled between signal processor 355 and the green light LED drive circuit 312, in order to work period according to the second work period control signal Pg modulation, one second pulse wave width modulation signal, and the output second pulse wave width modulation signal is to green light LED drive circuit 312, with the modulation second driving voltage Vg.The 3rd pulse wave width modulation signal generator 373 is coupled between signal processor 355 and the blue-ray LED drive circuit 313, in order to work period according to the 3rd work period control signal Pb modulation 1 the 3rd pulse wave width modulation signal, and output the 3rd pulse wave width modulation signal is to blue-ray LED drive circuit 313, with modulation the 3rd driving voltage Vb.

In the course of work of LED light source system 300, the optical wavelength of the light that is sent when ruddiness led module 301, green light LED module 302 or blue-ray LED module 303, when causing the optical wavelength change because of variations in temperature, first, second or the 3rd feedback voltage also can change thereupon, handle the light that is sent in order to accurate control red-light LED module 301, green light LED module 302 or blue-ray LED module 303 so just carry out signal compensation according to first, second or the 3rd feedback voltage.The details operation principle of LED light source system 300 is illustrated in color control method described later.

Please refer to Fig. 4, Fig. 5, reach Fig. 6, Fig. 4 to Fig. 6 shows that the flow process of this color control method comprises according to the flow chart of the color control method of the LED light source system 200 of Fig. 2:

Step S401:, utilize red-light LED drive circuit 211 supplies one first drive current Ir to red-light LED module 201 in one first period;

Step S403: in the very first time of first period, utilize first differential amplifier 231 and first signal amplifier 215 to carry out the differential processing and amplifying and the signal processing and amplifying of one first pressure drop of red-light LED module 201, correspond to one first feedback voltage V 1a of red-light LED module 201 with generation, and utilize color sensor 280 and chromascope 290 to detect the light that red-light LED module 201 is sent, correspond to one first red signal light R1a of red-light LED module 201 with generation, one first green optical signal G1a, one first blue light signal B1a, and one first group of CIE tristimulus values X1a, Y1a, and Z1a;

Step S405: in one second time of first period, utilize first differential amplifier 231 and first signal amplifier 215 to carry out the differential processing and amplifying and the signal processing and amplifying of one second pressure drop of red-light LED module 201, correspond to one second feedback voltage V 1b of red-light LED module 201 with generation, and utilize color sensor 280 and chromascope 290 to detect the light that red-light LED module 201 is sent, correspond to one second red signal light R1b of red-light LED module 201 with generation, one second green optical signal G1b, one second blue light signal B1b, and one second group of CIE tristimulus values X1b, Y1b, and Z1b;

Step S407:, utilize green light LED drive circuit 212 supplies one second drive current Ig to green light LED module 202 in one second period;

Step S409: in the very first time of second period, utilize second differential amplifier 232 and secondary signal amplifier 220 to carry out the differential processing and amplifying and the signal processing and amplifying of one first pressure drop of green light LED module 202, correspond to one first feedback voltage V 2a of green light LED module 202 with generation, and utilize color sensor 280 and chromascope 290 to detect the light that green light LED module 202 is sent, correspond to one first red signal light R2a of green light LED module 202 with generation, one first green optical signal G2a, one first blue light signal B2a, and one first group of CIE tristimulus values X2a, Y2a, and Z2a;

Step S411: in one second time of second period, utilize second differential amplifier 232 and secondary signal amplifier 220 to carry out the differential processing and amplifying and the signal processing and amplifying of one second pressure drop of green light LED module 202, correspond to one second feedback voltage V 2b of green light LED module 202 with generation, and utilize color sensor 280 and chromascope 290 to detect the light that green light LED module 202 is sent, correspond to one second red signal light R2b of green light LED module 202 with generation, one second green optical signal G2b, one second blue light signal B2b, and one second group of CIE tristimulus values X2b, Y2b, and Z2b;

Step S413:, utilize blue-ray LED drive circuit 213 supplies one the 3rd drive current Ib to blue-ray LED module 203 in one the 3rd period;

Step S415: in the very first time of the 3rd period, utilize the 3rd differential amplifier 233 and the 3rd signal amplifier 225 to carry out the differential processing and amplifying and the signal processing and amplifying of one first pressure drop of blue-ray LED module 203, correspond to one first feedback voltage V 3a of blue-ray LED module 203 with generation, and utilize color sensor 280 and chromascope 290 to detect the light that blue-ray LED module 203 is sent, correspond to one first red signal light R3a of blue-ray LED module 203 with generation, one first green optical signal G3a, one first blue light signal B3a, and one first group of CIE tristimulus values X3a, Y3a, and Z3a;

Step S417: in one second time of the 3rd period, utilize the 3rd differential amplifier 233 and the 3rd signal amplifier 225 to carry out the differential processing and amplifying and the signal processing and amplifying of one second pressure drop of blue-ray LED module 203, correspond to one second feedback voltage V 3b of blue-ray LED module 203 with generation, and utilize color sensor 280 and chromascope 290 to detect the light that blue-ray LED module 203 is sent, correspond to one second red signal light R3b of blue-ray LED module 203 with generation, one second green optical signal G3b, one second blue light signal B3b, and one second group of CIE tristimulus values X3b, Y3b, and Z3b;

Step S419: utilize the red-light LED drive circuit 211 supplies first drive current Ir to red-light LED module 201, utilize the green light LED drive circuit 212 supplies second drive current Ig to green light LED module 202, and utilize blue-ray LED drive circuit 213 supplies the 3rd drive current Ib to blue-ray LED module 203;

Step S421: utilize first differential amplifier 231 and first signal amplifier 215 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 3rd pressure drop of red-light LED module 201, correspond to one the 3rd feedback voltage V 1t of red-light LED module 201 with generation;

Step S423:, utilize signal processor 255 via following formula (1), (2), and (3) according to the 3rd feedback voltage V 1t that corresponds to red-light LED module 201, the first feedback voltage V 1a, the second feedback voltage V 1b, first group of CIE tristimulus values X1a, Y1a, and Z1a, and second group of CIE tristimulus values X1b, Y1b, and Z1b:

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t}{X1a-X1t}$ ... formula (1)

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t}{Y1a-Y1t}$ ... formula (2)

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t}{Z1a-Z1t}$ ... formula (3)

Generation corresponds to the 3rd group of CIE tristimulus values X1t, Y1t, and the Z1t of red-light LED module 201; Step S425:, utilize signal processor 255 via following formula (4), (5), and (6) according to the 3rd feedback voltage V 1t that corresponds to red-light LED module 201, the first feedback voltage V 1a, the second feedback voltage V 1b, the first red signal light R1a, the first green optical signal G1a, the first blue light signal B1a, the second red signal light R1b, the second green optical signal G1b, and the second blue light signal B1b:

$\frac{V1a-V1b}{R1a-R1b}=\frac{V1a-V1t}{R1a-R1t}$ ... formula (4)

$\frac{V1a-V1b}{G1a-G1b}=\frac{V1a-V1t}{G1a-G1t}$ ... formula (5)

$\frac{V1a-V1b}{B1a-B1b}=\frac{V1a-V1t}{B1a-B1t}$ ... formula (6)

Generation corresponds to one the 3rd red signal light R1t, one the 3rd green optical signal G1t, and one the 3rd blue light signal B1t of red-light LED module 201;

Step S427: utilize second differential amplifier 232 and secondary signal amplifier 220 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 3rd pressure drop of green light LED module 202, correspond to one the 3rd feedback voltage V 2t of green light LED module 202 with generation;

Step S429:, utilize signal processor 255 via following formula (7), (8), and (9) according to the 3rd feedback voltage V 2t that corresponds to green light LED module 202, the first feedback voltage V 2a, the second feedback voltage V 2b, first group of CIE tristimulus values X2a, Y2a, and Z2a, and second group of CIE tristimulus values X2b, Y2b, and Z2b:

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t}{X2a-X2t}$ ... formula (7)

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t}{Y2a-Y2t}$ ... formula (8)

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t}{Z2a-Z2t}$ ... formula (9)

Generation corresponds to the 3rd group of CIE tristimulus values X2t, Y2t, and the Z2t of green light LED module 202;

Step S431:, utilize signal processor 255 via following formula (10), (11), and (12) according to the 3rd feedback voltage V 2t that corresponds to green light LED module 202, the first feedback voltage V 2a, the second feedback voltage V 2b, the first red signal light R2a, the first green optical signal G2a, the first blue light signal B2a, the second red signal light R2b, the second green optical signal G2b, and the second blue light signal B2b:

$\frac{V2a-V2b}{R2a-R2b}=\frac{V2a-V2t}{R2a-R2t}$ ... formula (10)

$\frac{V2a-V2b}{G2a-G2b}=\frac{V2a-V2t}{G2a-G2t}$ ... formula (11)

$\frac{V2a-V2b}{B2a-B2b}=\frac{V2a-V2t}{B2a-B2t}$ ... formula (12)

Generation corresponds to one the 3rd red signal light R2t, one the 3rd green optical signal G2t, and one the 3rd blue light signal B2t of green light LED module 202;

Step S433: utilize the 3rd differential amplifier 233 and the 3rd signal amplifier 225 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 3rd pressure drop of blue-ray LED module 203, correspond to one the 3rd feedback voltage V 3t of blue-ray LED module 203 with generation;

Step S435:, utilize signal processor 255 via following formula (13), (14), and (15) according to the 3rd feedback voltage V 3t that corresponds to blue-ray LED module 203, the first feedback voltage V 3a, the second feedback voltage V 3b, first group of CIE tristimulus values X3a, Y3a, and Z3a, and second group of CIE tristimulus values X3b, Y3b, and Z3b:

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t}{X3a-X3t}$ ... formula (13)

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t}{Y3a-Y3t}$ ... formula (14)

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t}{Z3a-Z3t}$ ... formula (15)

Generation corresponds to the 3rd group of CIE tristimulus values X3t, Y3t, and the Z3t of blue-ray LED module 203;

Step S437:, utilize signal processor 255 via following formula (16), (17), and (18) according to the 3rd feedback voltage V 3t that corresponds to blue-ray LED module 203, the first feedback voltage V 3a, the second feedback voltage V 3b, the first red signal light R3a, the first green optical signal G3a, the first blue light signal B3a, the second red signal light R3b, the second green optical signal G3b, and the second blue light signal B3b:

$\frac{V3a-V3b}{R3a-R3b}=\frac{V3a-V3t}{R3a-R3t}$ ... formula (16)

$\frac{V3a-V3b}{G3a-G3b}=\frac{V3a-V3t}{G3a-G3t}$ ... formula (17)

$\frac{V3a-V3b}{B3a-B3b}=\frac{V3a-V3t}{B3a-B3t}$ ... formula (18)

Generation corresponds to one the 3rd red signal light R3t, one the 3rd green optical signal G3t, and one the 3rd blue light signal B3t of blue-ray LED module 203;

Step S439: according to the 3rd group of CIE tristimulus values X1t that corresponds to red-light LED module 201, Y1t, and Z1t, the 3rd red signal light R1t, the 3rd green optical signal G1t, and the 3rd blue light signal B1t, correspond to the 3rd group of CIE tristimulus values X2t of green light LED module 202, Y2t, and Z2t, the 3rd red signal light R2t, the 3rd green optical signal G2t, and the 3rd blue light signal B2t, and the 3rd group of CIE tristimulus values X3t that corresponds to blue-ray LED module 203, Y3t, and Z3t, the 3rd red signal light R3t, the 3rd green optical signal G3t, and the 3rd blue light signal B3t, utilize signal processor 255 via following formula (19):

$\left[\begin{array}{ccc}R1t& R2t& R3t\\ G1t& G2t& G3t\\ B1t& B2t& B3t\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{ccc}X1t& X2t& X3t\\ Y1t& Y2t& Y3t\\ Z1t& Z2t& Z3t\end{array}\right]$ ... formula (19)

Carry out that inverse matrix is handled and matrix multiple is handled, to calculate one first coefficient matrix [Dij] 3 * 3, wherein first coefficient matrix [Dij] 3 * 3 is in the formula (19), 3 * 3 matrixes of being made up of coefficient D11 to D33;

Step S441:, utilize matrix multiplier 260 via following formula (20) according to 3 * 3 and one groups of first coefficient matrixes [Dij] default CIE tristimulus values Xpreset, Ypreset, and Zpreset:

$\left[\begin{array}{c}\mathrm{Rc}\\ \mathrm{Gc}\\ \mathrm{Bc}\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{c}\mathrm{Xpreset}\\ \mathrm{Ypreset}\\ \mathrm{Zpreset}\end{array}\right]$ ... formula (20)

Carrying out matrix multiple handles to calculate one first control signal Rc, one second control signal Gc, to reach one the 3rd control signal Bc;

Step S443: utilize color sensor 280 to detect red-light LED module 201, green light LED module 202, reach the light that blue-ray LED module 203 is sent, to produce a quatre light signal, one the 4th green optical signal, to reach one the 4th blue light signal;

Step S445: utilize first comparator 261 to carry out the comparison process of the first control signal Rc and quatre light signal to produce one first work period control signal Pr, utilize comparison process that second comparator 262 carries out the second control signal Gc and the 4th green optical signal producing one second work period control signal Pg, and the comparison process of utilizing the 3rd comparator 263 execution the 3rd control signal Bc and the 4th blue light signal is to produce one the 3rd work period control signal Pb;

Step S447: utilize the work period of the first pulse wave width modulation signal generator 271 according to the first work period control signal Pr modulation, one first pulse wave width modulation signal, and export the first pulse wave width modulation signal to red-light LED drive circuit 211, utilize the work period of the second pulse wave width modulation signal generator 272 according to the second work period control signal Pg modulation, one second pulse wave width modulation signal, and export the second pulse wave width modulation signal to green light LED drive circuit 212, and utilize the work period of the 3rd pulse wave width modulation signal generator 273, and export the 3rd pulse wave width modulation signal to blue-ray LED drive circuit 213 according to the 3rd work period control signal Pb modulation 1 the 3rd pulse wave width modulation signal; And

Step S449: according to the first pulse wave width modulation signal controlling red-light LED drive circuit 211 with the modulation first drive current Ir, according to the second pulse wave width modulation signal controlling green light LED drive circuit 212 with the modulation second drive current Ig, reach according to the 3rd pulse wave width modulation signal controlling blue-ray LED drive circuit 213 with modulation the 3rd drive current Ib, execution in step S419, and can repeated execution of steps S421～S449.

As repeating step S421: utilize first differential amplifier 231 and first signal amplifier 215 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 4th pressure drop of red-light LED modules 201, correspond to one the 4th feedback voltage V 1t ' of red-light LED module 201 with generation;

As repeating step S423:, utilize signal processor 255 via following formula (1), (2), and (3) according to the 4th feedback voltage V 1t ' that corresponds to red-light LED module 201, the first feedback voltage V 1a, the second feedback voltage V 1b, first group of CIE tristimulus values X1a, Y1a, and Z1a, and second group of CIE tristimulus values X1b, Y1b, and Z1b:

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t^{\′}}{X1a-X1t^{\′}}$ ... formula (1)

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t^{\′}}{Y1a-Y1t^{\′}}$ ... formula (2)

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t^{\′}}{Z1a-Z1t^{\′}}$ ... formula (3)

Generation corresponds to the 4th group of CIE tristimulus values X1t ', Y1t ', and the Z1t ' of red-light LED module 201;

As repeating step S425:, utilize signal processor 255 via following formula (4), (5), and (6) according to the 4th feedback voltage V 1t ' that corresponds to red-light LED module 201, the first feedback voltage V 1a, the second feedback voltage V 1b, the first red signal light R1a, the first green optical signal G1a, the first blue light signal B1a, the second red signal light R1b, the second green optical signal G1b, and the second blue light signal B1b:

$\frac{V1a-V1b}{R1a-R1b}=\frac{V1a-V1t^{\′}}{R1a-R1t^{\′}}$ ... formula (4)

$\frac{V1a-V1b}{G1a-G1b}=\frac{V1a-V1t^{\′}}{G1a-G1t^{\′}}$ ... formula (5)

$\frac{V1a-V1b}{B1a-B1b}=\frac{V1a-V1t^{\′}}{B1a-B1t^{\′}}$ ... formula (6)

Generation corresponds to a quatre light signal R1t ', one the 4th green optical signal G1t ', and one the 4th blue light signal B1t ' of red-light LED module 201;

As repeating step S427: utilize second differential amplifier 232 and secondary signal amplifier 220 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 4th pressure drop of green light LED modules 202, correspond to one the 4th feedback voltage V 2t ' of green light LED module 202 with generation;

As repeating step S429:, utilize signal processor 255 via following formula (7), (8), and (9) according to the 4th feedback voltage V 2t ' that corresponds to green light LED module 202, the first feedback voltage V 2a, the second feedback voltage V 2b, first group of CIE tristimulus values X2a, Y2a, and Z2a, and second group of CIE tristimulus values X2b, Y2b, and Z2b:

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t^{\′}}{X2a-X2t^{\′}}$ ... formula (7)

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t^{\′}}{Y2a-Y2t^{\′}}$ ... formula (8)

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t^{\′}}{Z2a-Z2t^{\′}}$ ... formula (9)

Generation corresponds to the 4th group of CIE tristimulus values X2t ', Y2t ', and the Z2t ' of green light LED module 202;

As repeating step S431:, utilize signal processor 255 via following formula (10), (11), and (12) according to the 4th feedback voltage V 2t ' that corresponds to green light LED module 202, the first feedback voltage V 2a, the second feedback voltage V 2b, the first red signal light R2a, the first green optical signal G2a, the first blue light signal B2a, the second red signal light R2b, the second green optical signal G2b, and the second blue light signal B2b:

$\frac{V2a-V2b}{R2a-R2b}=\frac{V2a-V2t^{\′}}{R2a-R2t^{\′}}$ ... formula (10)

$\frac{V2a-V2b}{G2a-G2b}=\frac{V2a-V2t^{\′}}{G2a-G2t^{\′}}$ ... formula (11)

$\frac{V2a-V2b}{B2a-B2b}=\frac{V2a-V2t^{\′}}{B2a-B2t^{\′}}$ ... formula (12)

Generation corresponds to a quatre light signal R2t ', one the 4th green optical signal G2t ', and one the 4th blue light signal B2t ' of green light LED module 202;

As repeating step S433: utilize the 3rd differential amplifier 233 and the 3rd signal amplifier 225 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 4th pressure drop of blue-ray LED modules 203, correspond to one the 4th feedback voltage V 3t ' of blue-ray LED module 203 with generation;

As repeating step S435:, utilize signal processor 255 via following formula (13), (14), and (15) according to the 4th feedback voltage V 3t ' that corresponds to blue-ray LED module 203, the first feedback voltage V 3a, the second feedback voltage V 3b, first group of CIE tristimulus values X3a, Y3a, and Z3a, and second group of CIE tristimulus values X3b, Y3b, and Z3b:

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t^{\′}}{X3a-X3t^{\′}}$ ... formula (13)

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t^{\′}}{Y3a-Y3t^{\′}}$ ... formula (14)

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t^{\′}}{Z3a-Z3t^{\′}}$ ... formula (15)

Generation corresponds to the 4th group of CIE tristimulus values X3t ', Y3t ', and the Z3t ' of blue-ray LED module 203;

As repeating step S437:, utilize signal processor 255 via following formula (16), (17), and (18) according to the 4th feedback voltage V 3t ' that corresponds to blue-ray LED module 203, the first feedback voltage V 3a, the second feedback voltage V 3b, the first red signal light R3a, the first green optical signal G3a, the first blue light signal B3a, the second red signal light R3b, the second green optical signal G3b, and the second blue light signal B3b:

$\frac{V3a-V3b}{R3a-R3b}=\frac{V3a-V3t^{\′}}{R3a-R3t^{\′}}$ ... formula (16)

$\frac{V3a-V3b}{G3a-G3b}=\frac{V3a-V3t^{\′}}{G3a-G3t^{\′}}$ ... formula (17)

$\frac{V3a-V3b}{B3a-B3b}=\frac{V3a-V3t^{\′}}{B3a-B3t^{\′}}$ ... formula (18)

Generation corresponds to a quatre light signal R3t ', one the 4th green optical signal G3t ', and one the 4th blue light signal B3t ' of blue-ray LED module 203;

As repeating step S439: according to the 4th group of CIE tristimulus values X1t ' that corresponds to red-light LED module 201, Y1t ', and Z1t ', quatre light signal R1t ', the 4th green optical signal G1t ', and the 4th blue light signal B1t ', correspond to the 4th group of CIE tristimulus values X2t ' of green light LED module 202, Y2t ', and Z2t ', quatre light signal R2t ', the 4th green optical signal G2t ', and the 4th blue light signal B2t ', and the 4th group of CIE tristimulus values X3t ' that corresponds to blue-ray LED module 203, Y3t ', and Z3t ', quatre light signal R3t ', the 4th green optical signal G3t ', and the 4th blue light signal B3t ', utilize signal processor 255 via following formula (19):

$\left[\begin{array}{ccc}R1t^{\′}& R2t^{\′}& R3t^{\′}\\ G1t^{\′}& G2t^{\′}& G3t^{\′}\\ B1t^{\′}& B2t^{\′}& B3t^{\′}\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{ccc}X1t^{\′}& X2t^{\′}& X3t^{\′}\\ Y1t^{\′}& Y2t^{\′}& Y3t^{\′}\\ Z1t^{\′}& Z2t^{\′}& Z3t^{\′}\end{array}\right]$ ... formula (19)

Carry out that inverse matrix is handled and matrix multiple is handled, to calculate one second coefficient matrix [Dij] 3 * 3, wherein second coefficient matrix [Dij] 3 * 3 is in the formula (19), 3 * 3 matrixes of being made up of coefficient D11 to D33;

As repeating step S441:, utilize matrix multiplier 260 via following formula (20) according to second coefficient matrix [Dij] 3 * 3 and one groups of default CIE tristimulus values Xpreset, Ypreset, and Zpreset:

$\left[\begin{array}{c}R{c}^{\′}\\ G{c}^{\′}\\ B{c}^{\′}\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{c}\mathrm{Xpreset}\\ \mathrm{Ypreset}\\ \mathrm{Zpreset}\end{array}\right]$ ... formula (20)

Carrying out matrix multiple handles to calculate one the 4th control signal Rc ', one the 5th control signal Gc ', to reach one the 6th control signal Bc ';

As repeating step S443: utilize color sensor 280 to detect red-light LED modules 201, green light LED module 202, and the light that sent of blue-ray LED module 203, to produce one the 5th red signal light, one the 5th green optical signal, and one the 5th blue light signal;

As repeating step S445: utilize first comparator 261 to carry out the comparison process of the 4th control signal Rc and the 5th red signal light to produce one the 4th work period control signal Pr ', utilize comparison process that second comparator 262 carries out the 5th control signal Gc ' and the 5th green optical signal producing one the 5th work period control signal Pg ', and utilize the 3rd comparator 263 to carry out the comparison process of the 6th control signal Bc ' and the 5th blue light signal to produce one the 6th work period control signal Pb ';

As repeating step S447: utilize the work period of the first pulse wave width modulation signal generator 271 according to the 4th work period control signal Pr ' modulation one first pulse wave width modulation signal, and export the first pulse wave width modulation signal to red-light LED drive circuit 211, utilize the work period of the second pulse wave width modulation signal generator 272 according to the 5th work period control signal Pg ' modulation one second pulse wave width modulation signal, and export the second pulse wave width modulation signal to green light LED drive circuit 212, and utilize the work period of the 3rd pulse wave width modulation signal generator 273, and export the 3rd pulse wave width modulation signal to blue-ray LED drive circuit 213 according to the 6th work period control signal Pb ' modulation 1 the 3rd pulse wave width modulation signal; And

As repeating step S449: according to the first pulse wave width modulation signal controlling red-light LED drive circuit 211 with the modulation first drive current Ir, according to the second pulse wave width modulation signal controlling green light LED drive circuit 212 with the modulation second drive current Ig, reach according to the 3rd pulse wave width modulation signal controlling blue-ray LED drive circuit 213 with modulation the 3rd drive current Ib, execution in step S419.

In the color control method of above-mentioned LED light source system 200 according to Fig. 2, step S401 to step S417 be a preposition detection-phase, in order to the pressure drop signal that detects each led module chrominance signal corresponding and carrier chrominance signal with it, wherein, first period, second period, and the period of the 3rd period for not overlapping each other.Step S419 to step S449 then be a FEEDBACK CONTROL stage, cooperate pressure drop signal chrominance signal corresponding and the carrier chrominance signal that preposition detection-phase produced in order to change, carry out signal compensation and handle the light that is sent with accurate each led module of control with it according to pressure drop signal.

Described first pressure drop that utilizes first differential amplifier 231 and first signal amplifier 215 to carry out red-light LED module 201 of step S403 and S405, second pressure drop, and the differential processing and amplifying and the signal processing and amplifying of the 3rd pressure drop, can be only to utilize first differential amplifier 231 to carry out first pressure drop of red-light LED module 201, second pressure drop, and the 3rd pressure drop respectively with the differential processing and amplifying of the first reference voltage Vref r, or only utilize first signal amplifier 215 to carry out first pressure drop of red-light LED modules 201, second pressure drop, and the signal processing and amplifying of the 3rd pressure drop.In like manner, in step S409 and S411, can be only utilize second differential amplifier 232 carry out first pressure drop of green light LED modules 202, second pressure drop, and the 3rd pressure drop respectively with the differential processing and amplifying of the second reference voltage Vref g, or only utilize secondary signal amplifier 220 to carry out first pressure drop of green light LED modules 202, second pressure drop, and the signal processing and amplifying of the 3rd pressure drop.In like manner, in step S415 and S417, can be only utilize the 3rd differential amplifier 233 carry out first pressure drop of blue-ray LED modules 203, second pressure drop, and the 3rd pressure drop respectively with the differential processing and amplifying of the 3rd reference voltage Vref b, or only utilize the 3rd signal amplifier 225 to carry out first pressure drop of blue-ray LED modules 203, second pressure drop, and the signal processing and amplifying of the 3rd pressure drop.

Described first pressure drop that utilizes first differential amplifier 231 and first signal amplifier 215 to carry out red-light LED module 201 of step S421, second pressure drop, and the 3rd pressure drop or the differential processing and amplifying of the 4th pressure drop and signal processing and amplifying, can be only to utilize first differential amplifier 231 to carry out first pressure drop of red-light LED module 201, second pressure drop, and the 3rd pressure drop respectively with the differential processing and amplifying of the first reference voltage Vref r, or only utilize first signal amplifier 215 to carry out first pressure drop of red-light LED modules 201, second pressure drop, and the 3rd pressure drop or the signal processing and amplifying of the 4th pressure drop.In like manner, in step S427, can be only utilize second differential amplifier 232 carry out first pressure drop of green light LED modules 202, second pressure drop, and the 3rd pressure drop or the 4th pressure drop respectively with the differential processing and amplifying of the second reference voltage Vref g, or only utilize secondary signal amplifier 220 to carry out first pressure drop of green light LED modules 202, second pressure drop, and the 3rd pressure drop or the signal processing and amplifying of the 4th pressure drop.In like manner, in step S433, can be only utilize the 3rd differential amplifier 233 carry out first pressure drop of blue-ray LED modules 203, second pressure drop, and the 3rd pressure drop or the 4th pressure drop respectively with the differential processing and amplifying of the 3rd reference voltage Vref b, or only utilize the 3rd signal amplifier 225 to carry out first pressure drop of blue-ray LED modules 203, second pressure drop, and the 3rd pressure drop or the signal processing and amplifying of the 4th pressure drop.

Read for convenience, in repeated execution of steps S421～449 o'clock, with the 4th pressure drop, the 4th feedback voltage, the 4th group of CIE tristimulus values, the quatre light signal, the 4th green glow signal, the 4th blue light signal, second coefficient matrix, the 4th control signal, the 5th control signal, the 6th control signal, the 5th red signal light, the 5th green optical signal, the 5th blue light signal, the 4th work period control signal, the 5th work period control signal, the 6th work period control signal replaces the 3rd pressure drop, the 3rd feedback voltage, the 3rd group of CIE tristimulus values, the 3rd red signal light, the 3rd green glow signal, the 3rd blue light signal, first coefficient matrix, first control signal, second control signal, the 3rd control signal, the quatre light signal, the 4th green optical signal, the 4th blue light signal, the first work period control signal, the second work period control signal, the 3rd work period control signal.

In addition, carry out the measurement processing of chromascope 290 at step S417 after, after promptly finishing preposition detection-phase, thereafter step does not all re-use chromascope 290 and carries out the measurement processing, so behind execution in step S417, just can separate LED light source system 200 and chromascope 290, i.e. color control operation thereafter is to operate under the situation that does not need chromascope 290.

Please refer to Fig. 7 and Fig. 8, Fig. 7 and Fig. 8 show that the flow process of this color control method comprises according to the flow chart of the color control method of the LED light source system 300 of 3 figure:

Step S501:, utilize red-light LED drive circuit 311 supplies one first driving voltage Vr to red-light LED module 301 in one first period;

Step S503: in the very first time of first period, utilize first signal amplifier 315 to carry out the signal processing and amplifying of one first pressure drop of the first resistance R r of one first electric current that flows through red-light LED module 301, correspond to one first feedback voltage V 1a of red-light LED module 301 with generation, and utilize chromascope 390 to detect the light that red-light LED modules 301 are sent, correspond to one first group of CIE tristimulus values X1a, Y1a, and the Z1a of red-light LED module 301 with generation;

Step S505: in one second time of first period, utilize first signal amplifier 315 to carry out the signal processing and amplifying of one second pressure drop of the first resistance R r of one second electric current that flows through red-light LED module 301, correspond to one second feedback voltage V 1b of red-light LED module 301 with generation, and utilize chromascope 390 to detect the light that red-light LED modules 301 are sent, correspond to one second group of CIE tristimulus values X1b, Y1b, and the Z1b of red-light LED module 301 with generation;

Step S507:, utilize green light LED drive circuit 312 supplies one second driving voltage Vg to green light LED module 302 in one second period;

Step S509: in the very first time of second period, utilize secondary signal amplifier 320 to carry out the signal processing and amplifying of one first pressure drop of the second resistance R g of one first electric current that flows through green light LED module 302, correspond to one first feedback voltage V 2a of green light LED module 302 with generation, and utilize chromascope 390 to detect the light that green light LED modules 302 are sent, correspond to one first group of CIE tristimulus values X2a, Y2a, and the Z2a of green light LED module 302 with generation;

Step S511: in one second time of second period, utilize secondary signal amplifier 320 to carry out the signal processing and amplifying of one second pressure drop of the second resistance R g of one second electric current that flows through green light LED module 302, correspond to one second feedback voltage V 2b of green light LED module 302 with generation, and utilize chromascope 390 to detect the light that green light LED modules 302 are sent, correspond to one second group of CIE tristimulus values X2b, Y2b, and the Z2b of green light LED module 302 with generation;

Step S513:, utilize blue-ray LED drive circuit 313 supplies one the 3rd driving voltage Vb to blue-ray LED module 303 in one the 3rd period;

Step S515: in the very first time of the 3rd period, utilize the 3rd signal amplifier 325 to carry out the signal processing and amplifying of one first pressure drop of the 3rd resistance R b of one first electric current that flows through blue-ray LED module 303, correspond to one first feedback voltage V 3a of blue-ray LED module 303 with generation, and utilize chromascope 390 to detect the light that blue-ray LED modules 303 are sent, correspond to one first group of CIE tristimulus values X3a, Y3a, and the Z3a of blue-ray LED module 303 with generation;

Step S517: in one second time of the 3rd period, utilize the 3rd signal amplifier 325 to carry out the signal processing and amplifying of one second pressure drop of the 3rd resistance R b of one second electric current that flows through blue-ray LED module 303, correspond to one second feedback voltage V 3b of blue-ray LED module 303 with generation, and utilize chromascope 390 to detect the light that blue-ray LED modules 303 are sent, correspond to one second group of CIE tristimulus values X3b, Y3b, and the Z3b of blue-ray LED module 303 with generation;

Step S519: utilize the red-light LED drive circuit 311 supplies first driving voltage Vr to red-light LED module 301, utilize the green light LED drive circuit 312 supplies second driving voltage Vg to green light LED module 302, and utilize blue-ray LED drive circuit 313 supplies the 3rd driving voltage Vb to blue-ray LED module 303;

Step S521: utilize first signal amplifier 315 to carry out the signal processing and amplifying of one the 3rd pressure drop of the first resistance R r of one the 3rd electric current that flows through red-light LED module 301, correspond to one the 3rd feedback voltage V 1t of red-light LED module 301 with generation;

Step S523:, utilize signal processor 355 via following formula (21), (22), and (23) according to the 3rd feedback voltage V 1t that corresponds to red-light LED module 301, the first feedback voltage V 1a, the second feedback voltage V 1b, first group of CIE tristimulus values X1a, Y1a, and Z1a, and second group of CIE tristimulus values X1b, Y1b, and Z1b:

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t}{X1a-X1t}$ ... formula (21)

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t}{Y1a-Y1t}$ ... formula (22)

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t}{Z1a-Z1t}$ ... formula (23)

Generation corresponds to the 3rd group of CIE tristimulus values X1t, Y1t, and the Z1t of red-light LED module 301;

Step S525: utilize secondary signal amplifier 320 to carry out the signal processing and amplifying of one the 3rd pressure drop of the second resistance R g of one the 3rd electric current that flows through green light LED module 302, correspond to one the 3rd feedback voltage V 2t of green light LED module 302 with generation;

Step S527:, utilize signal processor 355 via following formula (24), (25), and (26) according to the 3rd feedback voltage V 2t that corresponds to green light LED module 302, the first feedback voltage V 2a, the second feedback voltage V 2b, first group of CIE tristimulus values X2a, Y2a, and Z2a, and second group of CIE tristimulus values X2b, Y2b, and Z2b:

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t}{X2a-X2t}$ ... formula (24)

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t}{Y2a-Y2t}$ ... formula (25)

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t}{Z2a-Z2t}$ ... formula (26)

Generation corresponds to the 3rd group of CIE tristimulus values X2t, Y2t, and the Z2t of green light LED module 302;

Step S529: utilize the 3rd signal amplifier 325 to carry out the signal processing and amplifying of one the 3rd pressure drop of the 3rd resistance R b of one the 3rd electric current that flows through blue-ray LED module 303, correspond to one the 3rd feedback voltage V 3t of blue-ray LED module 303 with generation;

Step S531:, utilize signal processor 355 via following formula (27), (28), and (29) according to the 3rd feedback voltage V 3t that corresponds to blue-ray LED module 303, the first feedback voltage V 3a, the second feedback voltage V 3b, first group of CIE tristimulus values X3a, Y3a, and Z3a, and second group of CIE tristimulus values X3b, Y3b, and Z3b:

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t}{X3a-X3t}$ ... formula (27)

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t}{Y3a-Y3t}$ ... formula (28)

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t}{Z3a-Z3t}$ ... formula (29)

Generation corresponds to the 3rd group of CIE tristimulus values X3t, Y3t, and the Z3t of blue-ray LED module 303;

Step S533:, utilize signal processor 355 via following formula (30), (31), and (32) according to the 3rd group of CIE tristimulus values X1t, Y1t corresponding to red-light LED module 301, and Z1t, the 3rd group of CIE tristimulus values X2t, Y2t corresponding to green light LED module 302, and Z2t, the 3rd group of CIE tristimulus values X3t, Y3t corresponding to blue-ray LED module 303, and Z3t and one group default CIE tristimulus values Xpreset, Ypreset, and Zpreset:

PrX1t+PgX2t+PbX3t=Xpreset...... formula (30)

PrY1t+PgY2t+PbY3t=Ypreset...... formula (31)

PrZ1t+PgZ2t+PbZ3t=Zpreset...... formula (32)

Calculate one first work period control signal Pr, one second work period control signal Pg, reach one the 3rd work period control signal Pb;

Step S535: utilize the work period of the first pulse wave width modulation signal generator 371 according to the first work period control signal Pr modulation, one first pulse wave width modulation signal, and export the first pulse wave width modulation signal to red-light LED drive circuit 311, utilize the work period of the second pulse wave width modulation signal generator 372 according to the second work period control signal Pg modulation, one second pulse wave width modulation signal, and export the second pulse wave width modulation signal to green light LED drive circuit 312, and utilize the work period of the 3rd pulse wave width modulation signal generator 373, and export the 3rd pulse wave width modulation signal to blue-ray LED drive circuit 313 according to the 3rd work period control signal Pb modulation 1 the 3rd pulse wave width modulation signal; And

Step S537: according to the first pulse wave width modulation signal controlling red-light LED drive circuit 311 with the modulation first driving voltage Vr, according to the second pulse wave width modulation signal controlling green light LED drive circuit 312 with the modulation second driving voltage Vg, reach according to the 3rd pulse wave width modulation signal controlling blue-ray LED drive circuit 313 with modulation the 3rd driving voltage Vb, execution in step S519, and can repeated execution of steps S521～S537.

In the color control method of above-mentioned LED light source system 300 according to Fig. 3, step S501 to step S517 be a preposition detection-phase, in order to detect the electric current associated pressure drop signal carrier chrominance signal corresponding of each led module with it, wherein, first period, second period, and the period of the 3rd period for not overlapping each other.Step S519 to step S537 then be a FEEDBACK CONTROL stage, cooperate the electric current associated pressure drop signal carrier chrominance signal corresponding that preposition detection-phase produced in order to change, carry out signal compensation and handle the light that is sent with accurate each led module of control with it according to electric current associated pressure drop signal.

In like manner, carry out the measurement processing of chromascope 390 at step S517 after, after promptly finishing preposition detection-phase, thereafter step does not all re-use chromascope 390 and carries out the measurement processing, so behind execution in step S517, just can separate LED light source system 300 and chromascope 390, i.e. color control operation thereafter operates under the situation that does not need chromascope 390.

Read for convenience, in repeated execution of steps S521～537 o'clock, with the 4th pressure drop, the 4th feedback voltage, the 4th group of CIE tristimulus values, the quatre light signal, the 4th green glow signal, the 4th blue light signal, second coefficient matrix, the 4th control signal, the 5th control signal, the 6th control signal, the 5th red signal light, the 5th green optical signal, the 5th blue light signal, the 4th work period control signal, the 5th work period control signal, the 6th work period control signal replaces the 3rd pressure drop, the 3rd feedback voltage, the 3rd group of CIE tristimulus values, the 3rd red signal light, the 3rd green glow signal, the 3rd blue light signal, first coefficient matrix, first control signal, second control signal, the 3rd control signal, the quatre light signal, the 4th green optical signal, the 4th blue light signal, the first work period control signal, the second work period control signal, the 3rd work period control signal.

Please refer to Fig. 9, Fig. 9 shows the block schematic diagram according to the LED light source system 900 of the tool color controlling mechanism of third embodiment of the invention.LED light source system 900 comprises a red-light LED module 901, a green light LED module 902, a blue-ray LED module 903, a red-light LED drive circuit 911, a green light LED drive circuit 912, a blue-ray LED drive circuit 913, one first signal amplifier 915, a secondary signal amplifier 920, one the 3rd signal amplifier 925, one first differential amplifier 931, one second differential amplifier 932, one the 3rd differential amplifier 933, reaches a color controller 950.Red-light LED module 901, green light LED module 902, and blue-ray LED module 903 comprise a string at least light-emitting diode respectively, each string light-emitting diode comprises at least one light-emitting diode.The delicolor controller 950 of LED light source system 900 can be coupled in a chromascope 990, chromascope 990 is in order to detect the light that red-light LED module 901, green light LED module 902 or blue-ray LED module 903 are sent, producing one group of CIE tristimulus values X, Y, and Z, and present CIE tristimulus values X, Y, and Z to delicolor controller 950.

Red-light LED drive circuit 911 is coupled in red-light LED module 901, is a driven with current sources circuit, in order to provide one first drive current Ir to red-light LED module 901.Green light LED drive circuit 912 is coupled in green light LED module 902, is a driven with current sources circuit, in order to provide one second drive current Ig to green light LED module 902.Blue-ray LED drive circuit 913 is coupled in blue-ray LED module 903, is a driven with current sources circuit, in order to provide one the 3rd drive current Ib to blue-ray LED module 903.

First differential amplifier 931 is coupled in red-light LED module 901, in order to one first pressure drop of execution red-light LED module 901 and the differential processing and amplifying of one first reference voltage Vref r, to produce one first differential voltage.First signal amplifier 915 is coupled in first differential amplifier 931, in order to carry out the signal processing and amplifying of first differential voltage, to produce one first feedback voltage.Second differential amplifier 932 is coupled in green light LED module 902, in order to one second pressure drop of execution green light LED module 902 and the differential processing and amplifying of one second reference voltage Vref g, to produce one second differential voltage.Secondary signal amplifier 920 is coupled in second differential amplifier 932, in order to carry out the signal processing and amplifying of second differential voltage, to produce one second feedback voltage.The 3rd differential amplifier 933 is coupled in blue-ray LED module 903, in order to one the 3rd pressure drop of execution blue-ray LED module 903 and the differential processing and amplifying of one the 3rd reference voltage Vref b, to produce one the 3rd differential voltage.The 3rd signal amplifier 925 is coupled in the 3rd differential amplifier 933, in order to carry out the signal processing and amplifying of the 3rd differential voltage, to produce one the 3rd feedback voltage.

First signal amplifier 915 can be by an operational amplifier 916, a resistance R r1, reach a resistance R r2, a noninverting amplifying circuit that is combined.Secondary signal amplifier 920 can be by an operational amplifier 921, a resistance R g1, reach a resistance R g2, a noninverting amplifying circuit that is combined.The 3rd signal amplifier 925 can be by an operational amplifier 926, a resistance R b1, reach a resistance R b2, a noninverting amplifying circuit that is combined.In one embodiment, can omit first signal amplifier 915, secondary signal amplifier 920, and the 3rd signal amplifier 925, and directly with first, second, and the 3rd differential voltage respectively as first, second, and the 3rd feedback voltage.In another embodiment, can omit first differential amplifier 931, second differential amplifier 932, reach the 3rd differential amplifier 933, and with first signal amplifier 915, secondary signal amplifier 920, and the 3rd signal amplifier 925 be coupled directly to red-light LED module 901, green light LED module 902, and blue-ray LED module 903 respectively, with direct execution first, second, and the signal processing and amplifying of the 3rd pressure drop and produce respectively first, second, and the 3rd feedback voltage.

Delicolor controller 950 comprises a signal processor 955, one first pulse wave width modulation signal generator 971, one second pulse wave width modulation signal generator 972, reaches one the 3rd pulse wave width modulation signal generator 973.Signal processor 955 is coupled in first signal amplifier 915, secondary signal amplifier 920, the 3rd signal amplifier 925, reaches chromascope 990, in order to according to first feedback voltage, second feedback voltage, the 3rd feedback voltage, CIE tristimulus values X, Y, and Z, and one group of default CIE tristimulus values Xpreset, Ypreset, and Zpreset, carry out signal processing to produce one first work period control signal Pr, one second work period control signal Pg, and one the 3rd work period control signal Pb.The first pulse wave width modulation signal generator 971 is coupled between signal processor 955 and the red-light LED drive circuit 911, in order to work period according to the first work period control signal Pr modulation, one first pulse wave width modulation signal, and the output first pulse wave width modulation signal is to red-light LED drive circuit 911, with the modulation first drive current Ir.The second pulse wave width modulation signal generator 972 is coupled between signal processor 955 and the green light LED drive circuit 912, in order to work period according to the second work period control signal Pg modulation, one second pulse wave width modulation signal, and the output second pulse wave width modulation signal is to green light LED drive circuit 912, with the modulation second drive current Ig.The 3rd pulse wave width modulation signal generator 973 is coupled between signal processor 955 and the blue-ray LED drive circuit 913, in order to work period according to the 3rd work period control signal Pb modulation 1 the 3rd pulse wave width modulation signal, and output the 3rd pulse wave width modulation signal is to blue-ray LED drive circuit 913, with modulation the 3rd drive current Ib.

In the course of work of LED light source system 900, the optical wavelength of the light that is sent when ruddiness led module 901, green light LED module 902 or blue-ray LED module 903, when causing the optical wavelength change because of variations in temperature, first, second or the 3rd feedback voltage also can change thereupon, handle the light that is sent in order to accurate control red-light LED module 901, green light LED module 902 or blue-ray LED module 903 so just carry out signal compensation according to first, second or the 3rd feedback voltage.The details operation principle of LED light source system 900 is illustrated in color control method described later.

Please refer to Figure 10 and Figure 11, Figure 10 and Figure 11 show that the flow process of this color control method comprises according to the flow chart of the color control method of the LED light source system 900 of 9 figure:

Step S901:, utilize red-light LED drive circuit 911 supplies one first drive current Ir to red-light LED module 901 in one first period;

Step S903: in the very first time of first period, utilize first differential amplifier 931 and first signal amplifier 915 to carry out the differential processing and amplifying and the signal processing and amplifying of one first pressure drop of red-light LED module 901, correspond to one first feedback voltage V 1a of red-light LED module 901 with generation, and utilize chromascope 990 to detect the light that red-light LED modules 901 are sent, correspond to one first group of CIE tristimulus values X1a, Y1a, and the Z1a of red-light LED module 901 with generation;

Step S905: in one second time of first period, utilize first differential amplifier 931 and first signal amplifier 915 to carry out the differential processing and amplifying and the signal processing and amplifying of one second pressure drop of red-light LED module 901, correspond to one second feedback voltage V 1b of red-light LED module 901 with generation, and utilize chromascope 990 to detect the light that red-light LED modules 901 are sent, correspond to one second group of CIE tristimulus values X1b, Y1b, and the Z1b of red-light LED module 901 with generation;

Step S907:, utilize green light LED drive circuit 912 supplies one second drive current Ig to green light LED module 902 in one second period;

Step S909: in the very first time of second period, utilize second differential amplifier 932 and secondary signal amplifier 920 to carry out the differential processing and amplifying and the signal processing and amplifying of one first pressure drop of green light LED module 902, correspond to one first feedback voltage V 2a of green light LED module 902 with generation, and utilize chromascope 990 to detect the light that green light LED modules 902 are sent, correspond to one first group of CIE tristimulus values X2a, Y2a, and the Z2a of green light LED module 902 with generation;

Step S911: in one second time of second period, utilize second differential amplifier 932 and secondary signal amplifier 920 to carry out the differential processing and amplifying and the signal processing and amplifying of one second pressure drop of green light LED module 902, correspond to one second feedback voltage V 2b of green light LED module 902 with generation, and utilize chromascope 990 to detect the light that green light LED modules 902 are sent, correspond to one second group of CIE tristimulus values X2b, Y2b, and the Z2b of green light LED module 902 with generation;

Step S913:, utilize blue-ray LED drive circuit 913 supplies one the 3rd drive current Ib to blue-ray LED module 903 in one the 3rd period;

Step S915: in the very first time of the 3rd period, utilize the 3rd differential amplifier 933 and the 3rd signal amplifier 925 to carry out the differential processing and amplifying and the signal processing and amplifying of one first pressure drop of blue-ray LED module 903, correspond to one first feedback voltage V 3a of blue-ray LED module 903 with generation, and utilize chromascope 990 to detect the light that blue-ray LED modules 903 are sent, correspond to one first group of CIE tristimulus values X3a, Y3a, and the Z3a of blue-ray LED module 903 with generation;

Step S917: in one second time of the 3rd period, utilize the 3rd differential amplifier 933 and the 3rd signal amplifier 925 to carry out the differential processing and amplifying and the signal processing and amplifying of one second pressure drop of blue-ray LED module 903, correspond to one second feedback voltage V 3b of blue-ray LED module 903 with generation, and utilize chromascope 990 to detect the light that blue-ray LED modules 903 are sent, correspond to one second group of CIE tristimulus values X3b, Y3b, and the Z3b of blue-ray LED module 903 with generation;

Step S919: utilize the red-light LED drive circuit 911 supplies first drive current Ir to red-light LED module 901, utilize the green light LED drive circuit 912 supplies second drive current Ig to green light LED module 902, and utilize blue-ray LED drive circuit 913 supplies the 3rd drive current Ib to blue-ray LED module 903;

Step S921: utilize first differential amplifier 931 and first signal amplifier 915 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 3rd pressure drop of red-light LED module 901, correspond to one the 3rd feedback voltage V 1t of red-light LED module 901 with generation;

Step S923:, utilize signal processor 355 via following formula (33), (34), and (35) according to the 3rd feedback voltage V 1t that corresponds to red-light LED module 901, the first feedback voltage V 1a, the second feedback voltage V 1b, first group of CIE tristimulus values X1a, Y1a, and Z1a, and second group of CIE tristimulus values X1b, Y1b, and Z1b:

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t}{X1a-X1t}$ ... formula (33)

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t}{Y1a-Y1t}$ ... formula (34)

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t}{Z1a-Z1t}$ ... formula (35)

Generation corresponds to the 3rd group of CIE tristimulus values X1t, Y1t, and the Z1t of red-light LED module 901;

Step S925: utilize second differential amplifier 932 and secondary signal amplifier 920 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 3rd pressure drop of green light LED module 902, correspond to one the 3rd feedback voltage V 2t of green light LED module 902 with generation;

Step S927:, utilize signal processor 355 via following formula (36), (37), and (38) according to the 3rd feedback voltage V 2t that corresponds to green light LED module 902, the first feedback voltage V 2a, the second feedback voltage V 2b, first group of CIE tristimulus values X2a, Y2a, and Z2a, and second group of CIE tristimulus values X2b, Y2b, and Z2b:

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t}{X2a-X2t}$ ... formula (36)

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t}{Y2a-Y2t}$ ... formula (37)

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t}{Z2a-Z2t}$ ... formula (38)

Generation corresponds to the 3rd group of CIE tristimulus values X2t, Y2t, and the Z2t of green light LED module 902;

Step S929: utilize the 3rd differential amplifier 933 and the 3rd signal amplifier 925 to carry out the differential processing and amplifying and the signal processing and amplifying of one the 3rd pressure drop of blue-ray LED module 903, correspond to one the 3rd feedback voltage V 3t of blue-ray LED module 903 with generation;

Step S931:, utilize signal processor 355 via following formula (39), (40), and (41) according to the 3rd feedback voltage V 3t that corresponds to blue-ray LED module 903, the first feedback voltage V 3a, the second feedback voltage V 3b, first group of CIE tristimulus values X3a, Y3a, and Z3a, and second group of CIE tristimulus values X3b, Y3b, and Z3b:

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t}{X3a-X3t}$ ... formula (39)

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t}{Y3a-Y3t}$ ... formula (40)

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t}{Z3a-Z3t}$ ... formula (41)

Generation corresponds to the 3rd group of CIE tristimulus values X3t, Y3t, and the Z3t of blue-ray LED module 903;

Step S933:, utilize signal processor 955 via following formula (42), (43), and (44) according to the 3rd group of CIE tristimulus values X1t, Y1t corresponding to red-light LED module 901, and Z1t, the 3rd group of CIE tristimulus values X2t, Y2t corresponding to green light LED module 902, and Z2t, the 3rd group of CIE tristimulus values X3t, Y3t corresponding to blue-ray LED module 903, and Z3t and one group default CIE tristimulus values Xpreset, Ypreset, and Zpreset:

PrX1t+PgX2t+PbX3t=Xpreset...... formula (42)

PrY1t+PgY2t+PbY3t=Ypreset...... formula (43)

PrZ1t+PgZ2t+PbZ3t=Zpreset...... formula (44)

Calculate one first work period control signal Pr, one second work period control signal Pg, reach one the 3rd work period control signal Pb;

Step S935: utilize the work period of the first pulse wave width modulation signal generator 971 according to the first work period control signal Pr modulation, one first pulse wave width modulation signal, and export the first pulse wave width modulation signal to red-light LED drive circuit 911, utilize the work period of the second pulse wave width modulation signal generator 972 according to the second work period control signal Pg modulation, one second pulse wave width modulation signal, and export the second pulse wave width modulation signal to green light LED drive circuit 912, and utilize the work period of the 3rd pulse wave width modulation signal generator 973, and export the 3rd pulse wave width modulation signal to blue-ray LED drive circuit 913 according to the 3rd work period control signal Pb modulation 1 the 3rd pulse wave width modulation signal; And

Step S937: according to the first pulse wave width modulation signal controlling red-light LED drive circuit 911 with the modulation first drive current Ir, according to the second pulse wave width modulation signal controlling green light LED drive circuit 912 with the modulation second drive current Ig, reach according to the 3rd pulse wave width modulation signal controlling blue-ray LED drive circuit 913 with modulation the 3rd drive current Ib, execution in step S919, and can repeated execution of steps S921～S937.

Read for convenience, in repeated execution of steps S521～537 o'clock, with the 4th pressure drop, the 4th feedback voltage, the 4th group of CIE tristimulus values, the quatre light signal, the 4th green glow signal, the 4th blue light signal, second coefficient matrix, the 4th control signal, the 5th control signal, the 6th control signal, the 5th red signal light, the 5th green optical signal, the 5th blue light signal, the 4th work period control signal, the 5th work period control signal, the 6th work period control signal replaces the 3rd pressure drop, the 3rd feedback voltage, the 3rd group of CIE tristimulus values, the 3rd red signal light, the 3rd green glow signal, the 3rd blue light signal, first coefficient matrix, first control signal, second control signal, the 3rd control signal, the quatre light signal, the 4th green optical signal, the 4th blue light signal, the first work period control signal, the second work period control signal, the 3rd work period control signal.

In the color control method of above-mentioned LED light source system 900 according to Fig. 9, step S901 to step S917 be a preposition detection-phase, in order to the pressure drop signal that detects each led module carrier chrominance signal corresponding with it, wherein, first period, second period, and the period of the 3rd period for not overlapping each other.Step S919 then is a FEEDBACK CONTROL stage to step S937, and in order to change the cooperation pressure drop signal carrier chrominance signal corresponding with it that preposition detection-phase produced according to pressure drop signal, the execution signal compensation is handled the light that is sent with accurate each led module of control.

Step S903, S905, and described first pressure drop that utilizes first differential amplifier 931 and first signal amplifier 915 to carry out red-light LED module 901 of S921, second pressure drop, and the 3rd pressure drop or the differential processing and amplifying of the 4th pressure drop and signal processing and amplifying, can be only to utilize first differential amplifier 931 to carry out first pressure drop of red-light LED module 901, second pressure drop, and the 3rd pressure drop or the 4th pressure drop respectively with the differential processing and amplifying of the first reference voltage Vref r, or only utilize first signal amplifier 915 to carry out first pressure drop of red-light LED modules 901, second pressure drop, and the 3rd pressure drop or the signal processing and amplifying of the 4th pressure drop.In like manner, step S909, S911, and S925 in, can be only utilize second differential amplifier 932 carry out first pressure drop of green light LED modules 902, second pressure drop, and the 3rd pressure drop or the 4th pressure drop respectively with the differential processing and amplifying of the second reference voltage Vref g, or only utilize secondary signal amplifier 920 to carry out first pressure drop of green light LED modules 902, second pressure drop, and the 3rd pressure drop or the signal processing and amplifying of the 4th pressure drop.In like manner, step S915, S917, and S929 in, can be only utilize the 3rd differential amplifier 933 carry out first pressure drop of blue-ray LED modules 903, second pressure drop, and the 3rd pressure drop or the 4th pressure drop respectively with the differential processing and amplifying of the 3rd reference voltage Vref b, or only utilize the 3rd signal amplifier 925 to carry out first pressure drop of blue-ray LED modules 903, second pressure drop, and the 3rd pressure drop or the signal processing and amplifying of the 4th pressure drop.

In addition, carry out the measurement processing of chromascope 990 at step S917 after, after promptly finishing preposition detection-phase, thereafter step does not all re-use chromascope 990 and carries out the measurement processing, so behind execution in step S917, just can separate LED light source system 900 and chromascope 990, i.e. color control operation thereafter operates under the situation that does not need chromascope 990.

From the above, color control method according to LED light source system of the present invention, can be when the variations in temperature of the LED crystal particle of LED light source system, the wavelength shift phenomenon of utilizing feedback control mechanism to cause because of variations in temperature according to the change in pressure drop or the electric current compensating for variations of light-emitting diode, the light that is sent in order to accurate control LED light source system.

Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; any have a technical field of the invention know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention is as the criterion when the scope that right requires.

Claims (25)

1. the color control method of a LED light source system, described LED light source system comprise a red-light LED module, a green light LED module, an and blue-ray LED module, and described color control method comprises:

Supply one first drive current to described red-light LED module in one first period;

In the very first time of described first period, one first pressure drop according to described red-light LED module produces the one first feedback voltage V 1a that corresponds to described red-light LED module, and detect the light that described red-light LED module is sent, correspond to one first red signal light R1a, one first green optical signal G1a, one first blue light signal B1a, and one first group of CIE tristimulus values X1a, Y1a and the Z1a of described red-light LED module with generation;

In one second time of described first period, one second pressure drop according to described red-light LED module produces the one second feedback voltage V 1b that corresponds to described red-light LED module, and detect the light that described red-light LED module is sent, correspond to one second red signal light R1b, one second green optical signal G1b, one second blue light signal B1b, and one second group of CIE tristimulus values X1b, Y1b and the Z1b of described red-light LED module with generation;

Supply one second drive current to described green light LED module in one second period;

In the very first time of described second period, one first pressure drop according to described green light LED module produces the one first feedback voltage V 2a that corresponds to described green light LED module, and detect the light that described green light LED module is sent, correspond to one first red signal light R2a, one first green optical signal G2a, one first blue light signal B2a, and one first group of CIE tristimulus values X2a, Y2a and the Z2a of described green light LED module with generation;

In one second time of described second period, one second pressure drop according to described green light LED module produces the one second feedback voltage V 2b that corresponds to described green light LED module, and detect the light that described green light LED module is sent, correspond to one second red signal light R2b, one second green optical signal G2b, one second blue light signal B2b, and one second group of CIE tristimulus values X2b, Y2b and the Z2b of described green light LED module with generation;

Supply one the 3rd drive current to described blue-ray LED module in one the 3rd period;

In the very first time of described the 3rd period, one first pressure drop according to described blue-ray LED module produces the one first feedback voltage V 3a that corresponds to described blue-ray LED module, and detect the light that described blue-ray LED module is sent, correspond to one first red signal light R3a, one first green optical signal G3a, one first blue light signal B3a, and one first group of CIE tristimulus values X3a, Y3a and the Z3a of described blue-ray LED module with generation;

In one second time of described the 3rd period, one second pressure drop according to described blue-ray LED module produces the one second feedback voltage V 3b that corresponds to described blue-ray LED module, and detect the light that described blue-ray LED module is sent, correspond to one second red signal light R3b, one second green optical signal G3b, one second blue light signal B3b, and one second group of CIE tristimulus values X3b, Y3b and the Z3b of described blue-ray LED module with generation;

Supply described first drive current to described red-light LED module, supply described second drive current, and described the 3rd drive current of supply is to described blue-ray LED module to described green light LED module;

One the 3rd pressure drop according to described red-light LED module produces one the 3rd feedback voltage V 1t that corresponds to described red-light LED module;

According to described the 3rd feedback voltage V 1t that corresponds to described red-light LED module, the described first feedback voltage V 1a, the described second feedback voltage V 1b, described first group of CIE tristimulus values X1a, Y1a and Z1a, and described second group of CIE tristimulus values X1b, Y1b and Z1b, utilize following formula to produce the 3rd group of CIE tristimulus values X1t, Y1t and the Z1t that corresponds to described red-light LED module;

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t}{X1a-X1t};$

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t}{Y1a-Y1t};$

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t}{Z1a-Z1t};$

According to described the 3rd feedback voltage V 1t that corresponds to described red-light LED module, the described first feedback voltage V 1a, the described second feedback voltage V 1b, the described first red signal light R1a, the described first green optical signal G1a, the described first blue light signal B1a, the described second red signal light R1b, the described second green optical signal G1b, and the described second blue light signal B1b, one the 3rd red signal light R1t, one the 3rd green optical signal G1t that utilizes following formula to produce to correspond to described red-light LED module, and one the 3rd blue light signal B1t;

$\frac{V1a-V1b}{R1a-R1b}=\frac{V1a-V1t}{R1a-R1t};$

$\frac{V1a-V1b}{G1a-G1b}=\frac{V1a-V1t}{G1a-G1t};$

$\frac{V1a-V1b}{B1a-B1b}=\frac{V1a-V1t}{B1a-B1t};$

One the 3rd pressure drop according to described green light LED module produces one the 3rd feedback voltage V 2t that corresponds to described green light LED module;

According to described the 3rd feedback voltage V 2t that corresponds to described green light LED module, the described first feedback voltage V 2a, the described second feedback voltage V 2b, described first group of CIE tristimulus values X2a, Y2a and Z2a, and described second group of CIE tristimulus values X2b, Y2b and Z2b, utilize following formula to produce the 3rd group of CIE tristimulus values X2t, Y2t and the Z2t that corresponds to described green light LED module;

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t}{X2a-X2t};$

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t}{Y2a-Y2t};$

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t}{Z2a-Z2t};$

According to described the 3rd feedback voltage V 2t that corresponds to described green light LED module, the described first feedback voltage V 2a, the described second feedback voltage V 2b, the described first red signal light R2a, the described first green optical signal G2a, the described first blue light signal B2a, the described second red signal light R2b, the described second green optical signal G2b, and the described second blue light signal B2b, one the 3rd red signal light R2t, one the 3rd green optical signal G2t that utilizes following formula to produce to correspond to described green light LED module, and one the 3rd blue light signal B2t;

$\frac{V2a-V2b}{R2a-R2b}=\frac{V2a-V2t}{R2a-R2t};$

$\frac{V2a-V2b}{G2a-G2b}=\frac{V2a-V2t}{G2a-G2t};$

$\frac{V2a-V2b}{B2a-B2b}=\frac{V2a-V2t}{B2a-B2t};$

One the 3rd pressure drop according to described blue-ray LED module produces one the 3rd feedback voltage V 3t that corresponds to described blue-ray LED module;

According to described the 3rd feedback voltage V 3t that corresponds to described blue-ray LED module, the described first feedback voltage V 3a, the described second feedback voltage V 3b, described first group of CIE tristimulus values X3a, Y3a and Z3a, and described second group of CIE tristimulus values X3b, Y3b and Z3b, utilize following formula to produce the 3rd group of CIE tristimulus values X3t, Y3t and the Z3t that corresponds to described blue-ray LED module;

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t}{X3a-X3t};$

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t}{Y3a-Y3t};$

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t}{Z3a-Z3t};$

According to described the 3rd feedback voltage V 3t of described blue-ray LED module, the described first feedback voltage V 3a, the described second feedback voltage V 3b, the described first red signal light R3a, the described first green optical signal G3a, the described first blue light signal B3a, the described second red signal light R3b, the described second green optical signal G3b, and the described second blue light signal B3b, utilize following formula to produce one the 3rd red signal light R3t, one the 3rd green optical signal G3t, and one the 3rd blue light signal B3t of described blue-ray LED module;

$\frac{V3a-V3b}{R3a-R3b}=\frac{V3a-V3t}{R3a-R3t};$

$\frac{V3a-V3b}{G3a-G3b}=\frac{V3a-V3t}{G3a-G3t};$

$\frac{V3a-V3b}{B3a-B3b}=\frac{V3a-V3t}{B3a-B3t};$

According to described the 3rd group of CIE tristimulus values X1t that corresponds to described red-light LED module, Y1t and Z1t, described the 3rd red signal light R1t, described the 3rd green optical signal G1t, described the 3rd blue light signal B1t, correspond to described the 3rd group of CIE tristimulus values X2t of described green light LED module, Y2t and Z2t, described the 3rd red signal light R2t, described the 3rd green optical signal G2t, described the 3rd blue light signal B2t, and correspond to described the 3rd group of CIE tristimulus values X3t of described blue-ray LED module, Y3t and Z3t, described the 3rd red signal light R3t, described the 3rd green optical signal G3t, described the 3rd blue light signal B3t, utilize following formula to calculate one first coefficient matrix [Dij] 3 * 3, wherein first coefficient matrix [Dij] 3 * 3 is in the following formula, 3 * 3 matrixes of being made up of coefficient D11 to D33;

$\left[\begin{array}{ccc}R1t& R2t& R3t\\ G1t& G2t& G3t\\ B1t& B2t& B3t\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{ccc}X1t& X2t& X3t\\ Y1t& Y2t& Y3t\\ Z1t& Z2t& Z3t\end{array}\right];$

According to one group of default CIE tristimulus values Xpreset, Ypreset and Zpreset, and described first coefficient matrix [Dij] 3 * 3, utilize following formula to calculate one first control signal Rc, one second control signal Gc, reach one the 3rd control signal Bc; And

$\left[\begin{array}{c}\mathrm{Rc}\\ \mathrm{Gc}\\ \mathrm{Bc}\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23.\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{c}\mathrm{Xpreset}\\ \mathrm{Ypreset}\\ \mathrm{Zpreset}\end{array}\right];$

According to described first drive current of the described first control signal Rc modulation, according to described second drive current of the described second control signal Gc modulation, and according to described the 3rd drive current of described the 3rd control signal Bc modulation;

Wherein said first period, described second period and described the 3rd period do not overlap each other.

2. color control method according to claim 1, wherein described first pressure drop according to described red-light LED module produces described first feedback voltage that corresponds to described red-light LED module, be to carry out described first pressure drop of described red-light LED module and the differential processing and amplifying of one first reference voltage, correspond to described first feedback voltage of described red-light LED module with generation; Described second pressure drop according to described red-light LED module produces described second feedback voltage that corresponds to described red-light LED module, be to carry out described second pressure drop of described red-light LED module and the differential processing and amplifying of described first reference voltage, correspond to described second feedback voltage of described red-light LED module with generation; Described first pressure drop according to described green light LED module produces described first feedback voltage that corresponds to described green light LED module, be to carry out described first pressure drop of described green light LED module and the differential processing and amplifying of one second reference voltage, correspond to described first feedback voltage of described green light LED module with generation; Described second pressure drop according to described green light LED module produces described second feedback voltage that corresponds to described green light LED module, be to carry out described second pressure drop of described green light LED module and the differential processing and amplifying of described second reference voltage, correspond to described second feedback voltage of described green light LED module with generation; Described first pressure drop according to described blue-ray LED module produces described first feedback voltage that corresponds to described blue-ray LED module, be to carry out described first pressure drop of described blue-ray LED module and the differential processing and amplifying of one the 3rd reference voltage, correspond to described first feedback voltage of described blue-ray LED module with generation; And described second feedback voltage that corresponds to described blue-ray LED module according to described second pressure drop generation of described blue-ray LED module, be to carry out described second pressure drop of described blue-ray LED module and the differential processing and amplifying of described the 3rd reference voltage, correspond to described second feedback voltage of described blue-ray LED module with generation.

3. color control method according to claim 1, wherein described first pressure drop according to described red-light LED module produces described first feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of carrying out described first pressure drop of described red-light LED module, correspond to described first feedback voltage of described red-light LED module with generation; Described second pressure drop according to described red-light LED module produces described second feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of carrying out described second pressure drop of described red-light LED module, correspond to described second feedback voltage of described red-light LED module with generation; Described first pressure drop according to described green light LED module produces described first feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of carrying out described first pressure drop of described green light LED module, correspond to described first feedback voltage of described green light LED module with generation; Described second pressure drop according to described green light LED module produces described second feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of carrying out described second pressure drop of described green light LED module, correspond to described second feedback voltage of described green light LED module with generation; Described first pressure drop according to described blue-ray LED module produces described first feedback voltage that corresponds to described blue-ray LED module, be the signal processing and amplifying of carrying out described first pressure drop of described blue-ray LED module, correspond to described first feedback voltage of described blue-ray LED module with generation; And described second feedback voltage that corresponds to described blue-ray LED module according to described second pressure drop generation of described blue-ray LED module, be the signal processing and amplifying of carrying out described second pressure drop of described blue-ray LED module, correspond to described second feedback voltage of described blue-ray LED module with generation.

4. color control method according to claim 1, wherein according to described first drive current of the described first control signal modulation, according to described second drive current of the described second control signal modulation, and according to described the 3rd drive current of described the 3rd control signal modulation, be that work period according to the described first control signal modulation, one first pulse wave width modulation signal is with described first drive current of modulation, according to work period of the described second control signal modulation, one second pulse wave width modulation signal with described second drive current of modulation, and according to work period of described the 3rd control signal modulation 1 the 3rd pulse wave width modulation signal with described the 3rd drive current of modulation.

5. color control method according to claim 4, wherein according to described work period of the described first pulse wave width modulation signal of the described first control signal modulation with described first drive current of modulation, according to described work period of the described second pulse wave width modulation signal of the described second control signal modulation with described second drive current of modulation, and according to described work period of described the 3rd pulse wave width modulation signal of described the 3rd control signal modulation with described the 3rd drive current of modulation, be to detect described red-light LED module, described green light LED module, reach the light that described blue-ray LED module is sent, to produce a quatre light signal, one the 4th green optical signal, and one the 4th blue light signal, more described first control signal and described quatre light signal are to produce one first work period control signal, according to described work period of the described first pulse wave width modulation signal of the described first work period control signal modulation with described first drive current of modulation, more described second control signal and described the 4th green optical signal are to produce one second work period control signal, according to described work period of the described second pulse wave width modulation signal of the described second work period control signal modulation with described second drive current of modulation, more described the 3rd control signal and described the 4th blue light signal to be producing one the 3rd work period control signal, according to described work period of described the 3rd pulse wave width modulation signal of described the 3rd work period control signal modulation with described the 3rd drive current of modulation.

6. color control method according to claim 1, wherein described the 3rd pressure drop according to described red-light LED module produces described the 3rd feedback voltage that corresponds to described red-light LED module, be to carry out described the 3rd pressure drop of described red-light LED module and the differential processing and amplifying of one first reference voltage, correspond to described the 3rd feedback voltage of described red-light LED module with generation; Described the 3rd pressure drop according to described green light LED module produces described the 3rd feedback voltage that corresponds to described green light LED module, be to carry out described the 3rd pressure drop of described green light LED module and the differential processing and amplifying of one second reference voltage, correspond to described the 3rd feedback voltage of described green light LED module with generation; And described the 3rd feedback voltage that corresponds to described blue-ray LED module according to described the 3rd pressure drop generation of described blue-ray LED module, be to carry out described the 3rd pressure drop of described blue-ray LED module and the differential processing and amplifying of one the 3rd reference voltage, correspond to described the 3rd feedback voltage of described blue-ray LED module with generation.

7. color control method according to claim 1, wherein described the 3rd pressure drop according to described red-light LED module produces described the 3rd feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of carrying out described the 3rd pressure drop of described red-light LED module, correspond to described the 3rd feedback voltage of described red-light LED module with generation; Described the 3rd pressure drop according to described green light LED module produces described the 3rd feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of carrying out described the 3rd pressure drop of described green light LED module, correspond to described the 3rd feedback voltage of described green light LED module with generation; And described the 3rd feedback voltage that corresponds to described blue-ray LED module according to described the 3rd pressure drop generation of described blue-ray LED module, be the signal processing and amplifying of carrying out described the 3rd pressure drop of described blue-ray LED module, correspond to described the 3rd feedback voltage of described blue-ray LED module with generation.

8. color control method according to claim 1 also comprises:

One the 4th pressure drop according to described red-light LED module produces one the 4th feedback voltage V 1t ' that corresponds to described red-light LED module;

According to described the 4th feedback voltage V 1t ' that corresponds to described red-light LED module, the described first feedback voltage V 1a, the described second feedback voltage V 1b, described first group of CIE tristimulus values X1a, Y1a and Z1a, and described second group of CIE tristimulus values X1b, Y1b and Z1b, utilize following formula to produce the 4th group of CIE tristimulus values X1t ', Y1t ' and the Z1t ' that corresponds to described red-light LED module;

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t^{\′}}{X1a-X1t^{\′}};$

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t^{\′}}{Y1a-Y1t^{\′}};$

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t^{\′}}{Z1a-Z1t^{\′}};$

According to described the 4th feedback voltage V 1t ' that corresponds to described red-light LED module, the described first feedback voltage V 1a, the described second feedback voltage V 1b, the described first red signal light R1a, the described first green optical signal G1a, the described first blue light signal B1a, the described second red signal light R1b, the described second green optical signal G1b, and the described second blue light signal B1b, a quatre light signal R1t ', one the 4th green optical signal G1t ' that utilizes following formula to produce to correspond to described red-light LED module, and one the 4th blue light signal B1t ';

$\frac{V1a-V1b}{R1a-R1b}=\frac{V1a-V1t^{\′}}{R1a-R1t^{\′}};$

$\frac{V1a-V1b}{G1a-G1b}=\frac{V1a-V1t^{\′}}{G1a-G1t^{\′}};$

$\frac{V1a-V1b}{B1a-B1b}=\frac{V1a-V1t^{\′}}{B1a-B1t^{\′}};$

One the 4th pressure drop according to described green light LED module produces one the 4th feedback voltage V 2t ' that corresponds to described green light LED module;

According to described the 4th feedback voltage V 2t ' that corresponds to described green light LED module, the described first feedback voltage V 2a, the described second feedback voltage V 2b, described first group of CIE tristimulus values X2a, Y2a and Z2a, and described second group of CIE tristimulus values X2b, Y2b and Z2b, utilize following formula to produce the 4th group of CIE tristimulus values X2t ', Y2t ' and the Z2t ' that corresponds to described green light LED module;

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t}{X2a-X2t};$

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t}{Y2a-Y2t};$

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t}{Z2a-Z2t};$

According to described the 4th feedback voltage V 2t ' that corresponds to described green light LED module, the described first feedback voltage V 2a, the described second feedback voltage V 2b, the described first red signal light R2a, the described first green optical signal G2a, the described first blue light signal B2a, the described second red signal light R2b, the described second green optical signal G2b, and the described second blue light signal B2b, a quatre light signal R2t ', one the 4th green optical signal G2t ' that utilizes following formula to produce to correspond to described green light LED module, and one the 4th blue light signal B2t ';

$\frac{V2a-V2b}{R2a-R2b}=\frac{V2a-V2t^{\′}}{R2a-R2t^{\′}};$

$\frac{V2a-V2b}{G2a-G2b}=\frac{V2a-V2t^{\′}}{G2a-G2t^{\′}};$

$\frac{V2a-V2b}{B2a-B2b}=\frac{V2a-V2t^{\′}}{B2a-B2t^{\′}};$

One the 4th pressure drop according to described blue-ray LED module produces one the 4th feedback voltage V 3t ' that corresponds to described blue-ray LED module;

According to described the 4th feedback voltage V 3t ' that corresponds to described blue-ray LED module, the described first feedback voltage V 3a, the described second feedback voltage V 3b, described first group of CIE tristimulus values X3a, Y3a and Z3a, and described second group of CIE tristimulus values X3b, Y3b and Z3b, utilize following formula to produce the 4th group of CIE tristimulus values X3t ', Y3t ' and the Z3t ' that corresponds to described blue-ray LED module;

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t^{\′}}{X3a-X3t^{\′}};$

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t^{\′}}{Y3a-Y3t^{\′}};$

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t^{\′}}{Z3a-Z3t^{\′}};$

According to described the 4th feedback voltage V 3t ' that corresponds to described blue-ray LED module, the described first feedback voltage V 3a, the described second feedback voltage V 3b, the described first red signal light R3a, the described first green optical signal G3a, the described first blue light signal B3a, the described second red signal light R3b, the described second green optical signal G3b, and the described second blue light signal B3b, a quatre light signal R3t ', one the 4th green optical signal G3t ' that utilizes following formula to produce to correspond to described blue-ray LED module, and one the 4th blue light signal B3t ';

$\frac{V3a-V3b}{R3a-R3b}=\frac{V3a-V3t^{\′}}{R3a-R3t^{\′}};$

$\frac{V3a-V3b}{G3a-G3b}=\frac{V3a-V3t^{\′}}{G3a-G3t^{\′}};$

$\frac{V3a-V3b}{B3a-B3b}=\frac{V3a-V3t^{\′}}{B3a-B3t^{\′}};$ According to described the 4th group of CIE tristimulus values X1t ' that corresponds to described red-light LED module, Y1t ' and Z1t ', described quatre light signal R1t ', described the 4th green optical signal G1t ', described the 4th blue light signal B 1t ', correspond to described the 4th group of CIE tristimulus values X2t ' of described green light LED module, Y2t ' and Z2t ', described quatre light signal R2t ', described the 4th green optical signal G2t ', described the 4th blue light signal B2t ', and correspond to described the 4th group of CIE tristimulus values X3t ' of described blue-ray LED module, Y3t ' and Z3t ', described quatre light signal R3t ', described the 4th green optical signal G3t ', described the 4th blue light signal B3t ', calculate one second coefficient matrix [Dij] 3 * 3, wherein second coefficient matrix [Dij] 3 * 3 is in the following formula, 3 * 3 matrixes of being made up of coefficient D11 to D33;

$\left[\begin{array}{ccc}R1t^{\′}& R2t^{\′}& R3t^{\′}\\ G1t^{\′}& G2t^{\′}& G3t^{\′}\\ B1t^{\′}& B2t^{\′}& B3t^{\′}\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{ccc}X1t^{\′}& X2t^{\′}& X3t^{\′}\\ Y1t^{\′}& Y2t^{\′}& Y3t^{\′}\\ Z1t^{\′}& Z2t^{\′}& Z3t^{\′}\end{array}\right];$

According to this group default CIE tristimulus values Xpreset, Ypreset and Zpreset, and described second coefficient matrix [Dij] 3 * 3, utilize following formula to calculate one the 4th control signal Rc ', one the 5th control signal Gc ', reach one the 6th control signal Bc ';

$\left[\begin{array}{c}R{c}^{\′}\\ G{c}^{\′}\\ B{c}^{\′}\end{array}\right]=\left[\begin{array}{ccc}D11& D12& D13\\ D21& D22& D23\\ D31& D32& D33\end{array}\right]\×\left[\begin{array}{c}\mathrm{Xpreset}\\ \mathrm{Ypreset}\\ \mathrm{Zpreset}\end{array}\right];$ And

According to described first drive current of described the 4th control signal Rc ' modulation, according to described second drive current of described the 5th control signal Gc ' modulation, and according to described the 3rd drive current of described the 6th control signal Bc ' modulation.

9. color control method according to claim 8, wherein according to described first drive current of described the 4th control signal modulation, according to described second drive current of described the 5th control signal modulation, and according to described the 3rd drive current of described the 6th control signal modulation, be that described work period according to the described first pulse wave width modulation signal of described the 4th control signal modulation is with described first drive current of modulation, according to described work period of the described second pulse wave width modulation signal of described the 5th control signal modulation with described second drive current of modulation, and according to described work period of described the 3rd pulse wave width modulation signal of described the 6th control signal modulation with described the 3rd drive current of modulation.

10. color control method according to claim 9, wherein according to described work period of the described first pulse wave width modulation signal of described the 4th control signal modulation with described first drive current of modulation, according to described work period of the described second pulse wave width modulation signal of described the 5th control signal modulation with described second drive current of modulation, and according to described work period of described the 3rd pulse wave width modulation signal of described the 6th control signal modulation with described the 3rd drive current of modulation, be to detect described red-light LED module, described green light LED module, reach the light that described blue-ray LED module is sent, to produce one the 5th red signal light, one the 5th green optical signal, and one the 5th blue light signal, more described the 4th control signal and described the 5th red signal light are to produce one the 4th work period control signal, according to described work period of the described first pulse wave width modulation signal of described the 4th work period control signal modulation with described first drive current of modulation, more described the 5th control signal and described the 5th green optical signal are to produce one the 5th work period control signal, according to described work period of the described second pulse wave width modulation signal of described the 5th work period control signal modulation with described second drive current of modulation, more described the 6th control signal and described the 5th blue light signal to be producing one the 6th work period control signal, according to described work period of described the 3rd pulse wave width modulation signal of described the 6th work period control signal modulation with described the 3rd drive current of modulation.

11. color control method according to claim 8, wherein described the 4th pressure drop according to described red-light LED module produces described the 4th feedback voltage that corresponds to described red-light LED module, be to carry out described the 4th pressure drop of described red-light LED module and the differential processing and amplifying of one first reference voltage, correspond to described the 4th feedback voltage of described red-light LED module with generation; Described the 4th pressure drop according to described green light LED module produces described the 4th feedback voltage that corresponds to described green light LED module, be to carry out described the 4th pressure drop of described green light LED module and the differential processing and amplifying of one second reference voltage, correspond to described the 4th feedback voltage of described green light LED module with generation; And described the 4th feedback voltage that corresponds to described blue-ray LED module according to described the 4th pressure drop generation of described blue-ray LED module, be to carry out described the 4th pressure drop of described blue-ray LED module and the differential processing and amplifying of one the 3rd reference voltage, correspond to described the 4th feedback voltage of described blue-ray LED module with generation.

12. color control method according to claim 8, wherein described the 4th pressure drop according to described red-light LED module produces described the 4th feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of carrying out described the 4th pressure drop of described red-light LED module, correspond to described the 4th feedback voltage of described red-light LED module with generation; Described the 4th pressure drop according to described green light LED module produces described the 4th feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of carrying out described the 4th pressure drop of described green light LED module, correspond to described the 4th feedback voltage of described green light LED module with generation; And described the 4th feedback voltage that corresponds to described blue-ray LED module according to described the 4th pressure drop generation of described blue-ray LED module, be the signal processing and amplifying of carrying out described the 4th pressure drop of described blue-ray LED module, correspond to described the 4th feedback voltage of described blue-ray LED module with generation.

13. the color control method of a LED light source system, described LED light source system comprise a red-light LED module, a green light LED module, reach a blue-ray LED module, described color control method comprises:

Supply one first driving voltage to described red-light LED module in one first period;

In the very first time of described first period, one first electric current according to the described red-light LED module of flowing through produces the one first feedback voltage V 1a that corresponds to described red-light LED module, and detect the light that described red-light LED module is sent, correspond to one first group of CIE tristimulus values X1a, Y1a and the Z1a of described red-light LED module with generation;

In one second time of described first period, one second electric current according to the described red-light LED module of flowing through produces the one second feedback voltage V 1b that corresponds to described red-light LED module, and detect the light that described red-light LED module is sent, correspond to one second group of CIE tristimulus values X1b, Y1b and the Z1b of described red-light LED module with generation;

Supply one second driving voltage to described green light LED module in one second period;

In the very first time of described second period, one first electric current according to the described green light LED module of flowing through produces the one first feedback voltage V 2a that corresponds to described green light LED module, and detect the light that described green light LED module is sent, correspond to one first group of CIE tristimulus values X2a, Y2a and the Z2a of described green light LED module with generation;

In one second time of described second period, one second electric current according to the described green light LED module of flowing through produces the one second feedback voltage V 2b that corresponds to described green light LED module, and detect the light that described green light LED module is sent, correspond to one second group of CIE tristimulus values X2b, Y2b and the Z2b of described green light LED module with generation;

Supply one the 3rd driving voltage to described blue-ray LED module in one the 3rd period;

In the very first time of described the 3rd period, one first electric current according to the described blue-ray LED module of flowing through produces the one first feedback voltage V 3a that corresponds to described blue-ray LED module, and detect the light that described blue-ray LED module is sent, correspond to one first group of CIE tristimulus values X3a, Y3a and the Z3a of described blue-ray LED module with generation;

In one second time of described the 3rd period, one second electric current according to the described blue-ray LED module of flowing through produces the one second feedback voltage V 3b that corresponds to described blue-ray LED module, and detect the light that described blue-ray LED module is sent, correspond to one second group of CIE tristimulus values X3b, Y3b and the Z3b of described blue-ray LED module with generation;

Supply described first driving voltage to described red-light LED module, supply described second driving voltage, and described the 3rd driving voltage of supply is to described blue-ray LED module to described green light LED module;

One the 3rd electric current according to the described red-light LED module of flowing through produces one the 3rd feedback voltage V 1t that corresponds to described red-light LED module;

According to described the 3rd feedback voltage V 1t that corresponds to described red-light LED module, the described first feedback voltage V 1a, the described second feedback voltage V 1b, described first group of CIE tristimulus values X1a, Y1a and Z1a, and described second group of CIE tristimulus values X1b, Y1b and Z1b, utilize following formula to produce the 3rd group of CIE tristimulus values X1t, Y1t and the Z1t that corresponds to described red-light LED module;

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t}{X1a-X1t};$

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t}{Y1a-Y1t};$

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t}{Z1a-Z1t};$

One the 3rd electric current according to described green light LED module produces one the 3rd feedback voltage V 2t that corresponds to described green light LED module;

According to described the 3rd feedback voltage V 2t that corresponds to described green light LED module, the described first feedback voltage V 2a, the described second feedback voltage V 2b, described first group of CIE tristimulus values X2a, Y2a and Z2a, and described second group of CIE tristimulus values X2b, Y2b and Z2b, utilize following formula to produce the 3rd group of CIE tristimulus values X2t, Y2t and the Z2t that corresponds to described green light LED module;

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t}{X2a-X2t};$

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t}{Y2a-Y2t};$

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t}{Z2a-Z2t};$

One the 3rd electric current according to the described blue-ray LED module of flowing through produces one the 3rd feedback voltage V 3t that corresponds to described blue-ray LED module;

According to described the 3rd feedback voltage V 3t that corresponds to described blue-ray LED module, the described first feedback voltage V 3a, the described second feedback voltage V 3b, described first group of CIE tristimulus values X3a, Y3a and Z3a, and described second group of CIE tristimulus values X3b, Y3b and Z3b, utilize following formula to produce the 3rd group of CIE tristimulus values X3t, Y3t and the Z3t that corresponds to described blue-ray LED module;

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t}{X3a-X3t};$

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t}{Y3a-Y3t};$

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t}{Z3a-Z3t};$

According to described the 3rd group of CIE tristimulus values X1t, Y1t and the Z1t that correspond to described red-light LED module, described the 3rd group of CIE tristimulus values X2t, Y2t and the Z2t that correspond to described green light LED module, described the 3rd group of CIE tristimulus values X3t, the Y3t that correspond to described blue-ray LED module and Z3t, and one group of default CIE tristimulus values Xpreset, Ypreset and Zpreset, utilize following formula to calculate one first work period control signal Pr, one second work period control signal Pg, and one the 3rd work period control signal Pb;

PrX1t+PgX2t+PbX3t＝Xpreset；

PrY1t+PgY2t+PbY3t＝Ypreset；

PrZ1t+PgZ2t+PbZ3t=Zpreset; And

According to described first driving voltage of the described first work period control signal Pr modulation, according to described second driving voltage of the described second work period control signal Pg modulation, and according to described the 3rd driving voltage of described the 3rd work period control signal Pb modulation;

Wherein said first period, described second period and described the 3rd period do not overlap each other.

14. color control method according to claim 13, wherein described first electric current according to the described red-light LED module of flowing through produces described first feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of one first pressure drop of carrying out one first resistance of described first electric current flow through described red-light LED module, correspond to described first feedback voltage of described red-light LED module with generation; Described second electric current according to the described red-light LED module of flowing through produces described second feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of one second pressure drop of carrying out described first resistance of described second electric current flow through described red-light LED module, correspond to described second feedback voltage of described red-light LED module with generation; Described first electric current according to the described green light LED module of flowing through produces described first feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of one first pressure drop of carrying out one second resistance of described first electric current flow through described green light LED module, correspond to described first feedback voltage of described green light LED module with generation; Described second electric current according to the described green light LED module of flowing through produces described second feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of one second pressure drop of carrying out described second resistance of described second electric current flow through described green light LED module, correspond to described second feedback voltage of described green light LED module with generation; Described first electric current according to the described blue-ray LED module of flowing through produces described first feedback voltage that corresponds to described blue-ray LED module, be the signal processing and amplifying of one first pressure drop of carrying out one the 3rd resistance of described first electric current flow through described blue-ray LED module, correspond to described first feedback voltage of described blue-ray LED module with generation; And described second feedback voltage that corresponds to described blue-ray LED module according to described second electric current generation of the described blue-ray LED module of flowing through, be the signal processing and amplifying of one second pressure drop of carrying out described the 3rd resistance of described second electric current flow through described blue-ray LED module, correspond to described second feedback voltage of described blue-ray LED module with generation.

15. color control method according to claim 13, wherein according to described first driving voltage of the described first work period control signal modulation, according to described second driving voltage of the described second work period control signal modulation, and according to described the 3rd driving voltage of described the 3rd work period control signal modulation, be that work period according to the described first work period control signal modulation, one first pulse wave width modulation signal is with described first driving voltage of modulation, according to work period of the described second work period control signal modulation, one second pulse wave width modulation signal with described second driving voltage of modulation, and according to work period of described the 3rd work period control signal modulation 1 the 3rd pulse wave width modulation signal with described the 3rd driving voltage of modulation.

16. color control method according to claim 13, wherein described the 3rd electric current according to described red-light LED module produces described the 3rd feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of a pressure drop of carrying out one first resistance of described the 3rd electric current flow through described red-light LED module, correspond to described the 3rd feedback voltage of described red-light LED module with generation; Described the 3rd electric current according to described green light LED module produces described the 3rd feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of a pressure drop of carrying out one second resistance of described the 3rd electric current flow through described green light LED module, correspond to described the 3rd feedback voltage of described green light LED module with generation; And described the 3rd feedback voltage that corresponds to described blue-ray LED module according to described the 3rd electric current generation of described blue-ray LED module, be the signal processing and amplifying of a pressure drop of carrying out one the 3rd resistance of described the 3rd electric current flow through described blue-ray LED module, correspond to described the 3rd feedback voltage of described blue-ray LED module with generation.

17. color control method according to claim 13 also comprises:

One the 4th electric current according to described red-light LED module produces one the 4th feedback voltage that corresponds to described red-light LED module;

According to described the 4th feedback voltage that corresponds to described red-light LED module, described first feedback voltage, described second feedback voltage, described first group of CIE tristimulus values, and described second group of CIE tristimulus values, produce one the 4th group of CIE tristimulus values that corresponds to described red-light LED module;

One the 4th electric current according to described green light LED module produces one the 4th feedback voltage that corresponds to described green light LED module;

According to described the 4th feedback voltage that corresponds to described green light LED module, described first feedback voltage, described second feedback voltage, described first group of CIE tristimulus values, and described second group of CIE tristimulus values, produce one the 4th group of CIE tristimulus values that corresponds to described green light LED module;

One the 4th electric current according to described blue-ray LED module produces one the 4th feedback voltage that corresponds to described blue-ray LED module;

According to described the 4th feedback voltage that corresponds to described blue-ray LED module, described first feedback voltage, described second feedback voltage, described first group of CIE tristimulus values, and described second group of CIE tristimulus values, produce one the 4th group of CIE tristimulus values that corresponds to described blue-ray LED module;

According to described the 4th group of CIE tristimulus values that corresponds to described red-light LED module, described the 4th group of CIE tristimulus values that corresponds to described green light LED module, described the 4th group of CIE tristimulus values that corresponds to described blue-ray LED module, and the default CIE tristimulus values of this group, calculate one the 4th work period control signal, one the 5th work period control signal, reach one the 6th work period control signal; And

According to described first driving voltage of described the 4th work period control signal modulation, according to described second driving voltage of described the 5th work period control signal modulation, and according to described the 3rd driving voltage of described the 6th work period control signal modulation.

18. color control method according to claim 17, wherein according to described first driving voltage of described the 4th work period control signal modulation, according to described second driving voltage of described the 5th work period control signal modulation, and according to described the 3rd driving voltage of described the 6th work period control signal modulation, be that work period according to described the 4th work period control signal modulation one first pulse wave width modulation signal is with described first driving voltage of modulation, according to work period of described the 5th work period control signal modulation one second pulse wave width modulation signal with described second driving voltage of modulation, and according to work period of described the 6th work period control signal modulation 1 the 3rd pulse wave width modulation signal with described the 3rd driving voltage of modulation.

19. color control method according to claim 17, wherein described the 4th electric current according to described red-light LED module produces described the 4th feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of a pressure drop of carrying out one first resistance of described the 4th electric current flow through described red-light LED module, correspond to described the 4th feedback voltage of described red-light LED module with generation; Described the 4th electric current according to described green light LED module produces described the 4th feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of a pressure drop of carrying out one second resistance of described the 4th electric current flow through described green light LED module, correspond to described the 4th feedback voltage of described green light LED module with generation; And described the 4th feedback voltage that corresponds to described blue-ray LED module according to described the 4th electric current generation of described blue-ray LED module, be the signal processing and amplifying of a pressure drop of carrying out one the 3rd resistance of described the 4th electric current flow through described blue-ray LED module, correspond to described the 4th feedback voltage of described blue-ray LED module with generation.

20. the color control method of a LED light source system, described LED light source system comprise a red-light LED module, a green light LED module, reach a blue-ray LED module, described color control method comprises:

Supply one first drive current to described red-light LED module in one first period;

In the very first time of described first period, one first pressure drop according to described red-light LED module produces the one first feedback voltage V 1a that corresponds to described red-light LED module, and detect the light that described red-light LED module is sent, correspond to one first group of CIE tristimulus values X1a, Y1a and the Z1a of described red-light LED module with generation;

In one second time of described first period, one second pressure drop according to described red-light LED module produces the one second feedback voltage V 1b that corresponds to described red-light LED module, and detect the light that described red-light LED module is sent, correspond to one second group of CIE tristimulus values X1b, Y1b and the Z1b of described red-light LED module with generation;

Supply one second drive current to described green light LED module in one second period;

In the very first time of described second period, one first pressure drop according to described green light LED module produces the one first feedback voltage V 2a that corresponds to described green light LED module, and detect the light that described green light LED module is sent, correspond to one first group of CIE tristimulus values X2a, Y2a and the Z2a of described green light LED module with generation;

In one second time of described second period, one second pressure drop according to described green light LED module produces the one second feedback voltage V 2b that corresponds to described green light LED module, and detect the light that described green light LED module is sent, correspond to one second group of CIE tristimulus values X2b, Y2b and the Z2b of described green light LED module with generation;

Supply one the 3rd drive current to described blue-ray LED module in one the 3rd period;

In the very first time of described the 3rd period, one first pressure drop according to described blue-ray LED module produces the one first feedback voltage V 3a that corresponds to described blue-ray LED module, and detect the light that described blue-ray LED module is sent, correspond to one first group of CIE tristimulus values X3a, Y3a and the Z3a of described blue-ray LED module with generation;

In one second time of described the 3rd period, one second pressure drop according to described blue-ray LED module produces the one second feedback voltage V 3b that corresponds to described blue-ray LED module, and detect the light that described blue-ray LED module is sent, correspond to one second group of CIE tristimulus values X3b, Y3b and the Z3b of described blue-ray LED module with generation;

Supply described first drive current to described red-light LED module, supply described second drive current, and described the 3rd drive current of supply is to described blue-ray LED module to described green light LED module;

One the 3rd pressure drop according to described red-light LED module produces one the 3rd feedback voltage V 1t that corresponds to described red-light LED module;

According to described the 3rd feedback voltage V 1t that corresponds to described red-light LED module, the described first feedback voltage V 1a, the described second feedback voltage V 1b, described first group of CIE tristimulus values X1a, Y1a and Z1a, and described second group of CIE tristimulus values X1b, Y1b and Z1b, utilize following formula to produce the 3rd group of CIE tristimulus values X1t, Y1t and the Z1t that corresponds to described red-light LED module;

$\frac{V1a-V1b}{X1a-X1b}=\frac{V1a-V1t}{X1a-X1t};$

$\frac{V1a-V1b}{Y1a-Y1b}=\frac{V1a-V1t}{Y1a-Y1t};$

$\frac{V1a-V1b}{Z1a-Z1b}=\frac{V1a-V1t}{Z1a-Z1t};$

One the 3rd pressure drop according to described green light LED module produces one the 3rd feedback voltage V 2t that corresponds to described green light LED module;

According to described the 3rd feedback voltage V 2t that corresponds to described green light LED module, the described first feedback voltage V 2a, the described second feedback voltage V 2b, described first group of CIE tristimulus values X2a, Y2a and Z2a, and described second group of CIE tristimulus values X2b, Y2b and Z2b, utilize following formula to produce the 3rd group of CIE tristimulus values X2t, Y2t and the Z2t that corresponds to described green light LED module;

$\frac{V2a-V2b}{X2a-X2b}=\frac{V2a-V2t}{X2a-X2t};$

$\frac{V2a-V2b}{Y2a-Y2b}=\frac{V2a-V2t}{Y2a-Y2t};$

$\frac{V2a-V2b}{Z2a-Z2b}=\frac{V2a-V2t}{Z2a-Z2t};$

One the 3rd pressure drop according to described blue-ray LED module produces one the 3rd feedback voltage V 3t that corresponds to described blue-ray LED module;

According to described the 3rd feedback voltage V 3t that corresponds to described blue-ray LED module, the described first feedback voltage V 3a, the described second feedback voltage V 3b, described first group of CIE tristimulus values X3a, Y3a and Z3a, and described second group of CIE tristimulus values X3b, Y3b and Z3b, utilize following formula to produce the 3rd group of CIE tristimulus values X3t, Y3t and the Z3t that corresponds to described blue-ray LED module;

$\frac{V3a-V3b}{X3a-X3b}=\frac{V3a-V3t}{X3a-X3t};$

$\frac{V3a-V3b}{Y3a-Y3b}=\frac{V3a-V3t}{Y3a-Y3t};$

$\frac{V3a-V3b}{Z3a-Z3b}=\frac{V3a-V3t}{Z3a-Z3t};$

According to described the 3rd group of CIE tristimulus values X1t, Y1t and the Z1t that correspond to described red-light LED module, described the 3rd group of CIE tristimulus values X2t, Y2t and the Z2t that correspond to described green light LED module, described the 3rd group of CIE tristimulus values X3t, the Y3t that correspond to described blue-ray LED module and Z3t, and one group of default CIE tristimulus values Xpreset, Ypreset and Zpreset, utilize following formula to calculate one first work period control signal Pr, one second work period control signal Pg, and one the 3rd work period control signal Pb;

PrX1t+PgX2t+PbX3t＝Xpreset；

PrY1t+PgY2t+PbY3t＝Ypreset；

PrZ1t+PgZ2t+PbZ3t=Zpreset; And

According to described first drive current of the described first work period control signal Pr modulation, according to described second drive current of the described second work period control signal Pg modulation, and according to described the 3rd drive current of described the 3rd work period control signal Pb modulation;

Wherein said first period, described second period and described the 3rd period do not overlap each other.

21. color control method according to claim 20, wherein described first pressure drop according to described red-light LED module produces described first feedback voltage that corresponds to described red-light LED module, be to carry out described first pressure drop of described red-light LED module and the differential processing and amplifying of one first reference voltage, correspond to described first feedback voltage of described red-light LED module with generation; Described second pressure drop according to described red-light LED module produces described second feedback voltage that corresponds to described red-light LED module, be to carry out described second pressure drop of described red-light LED module and the differential processing and amplifying of described first reference voltage, correspond to described second feedback voltage of described red-light LED module with generation; Described first pressure drop according to described green light LED module produces described first feedback voltage that corresponds to described green light LED module, be to carry out described first pressure drop of described green light LED module and the differential processing and amplifying of one second reference voltage, correspond to described first feedback voltage of described green light LED module with generation; Described second pressure drop according to described green light LED module produces described second feedback voltage that corresponds to described green light LED module, be to carry out described second pressure drop of described green light LED module and the differential processing and amplifying of described second reference voltage, correspond to described second feedback voltage of described green light LED module with generation; Described first pressure drop according to described blue-ray LED module produces described first feedback voltage that corresponds to described blue-ray LED module, be to carry out described first pressure drop of described blue-ray LED module and the differential processing and amplifying of one the 3rd reference voltage, correspond to described first feedback voltage of described blue-ray LED module with generation; Described second pressure drop according to described blue-ray LED module produces described second feedback voltage that corresponds to described blue-ray LED module, be to carry out described second pressure drop of described blue-ray LED module and the differential processing and amplifying of described the 3rd reference voltage, correspond to described second feedback voltage of described blue-ray LED module with generation; Described the 3rd pressure drop according to described red-light LED module produces described the 3rd feedback voltage that corresponds to described red-light LED module, be to carry out described the 3rd pressure drop of described red-light LED module and the differential processing and amplifying of one first reference voltage, correspond to described the 3rd feedback voltage of described red-light LED module with generation; Described the 3rd pressure drop according to described green light LED module produces described the 3rd feedback voltage that corresponds to described green light LED module, be to carry out described the 3rd pressure drop of described green light LED module and the differential processing and amplifying of one second reference voltage, correspond to described the 3rd feedback voltage of described green light LED module with generation; And described the 3rd feedback voltage that corresponds to described blue-ray LED module according to described the 3rd pressure drop generation of described blue-ray LED module, be to carry out described the 3rd pressure drop of described blue-ray LED module and the differential processing and amplifying of one the 3rd reference voltage, correspond to described the 3rd feedback voltage of described blue-ray LED module with generation.

22. color control method according to claim 20, wherein described first pressure drop according to described red-light LED module produces described first feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of carrying out described first pressure drop of described red-light LED module, correspond to described first feedback voltage of described red-light LED module with generation; Described second pressure drop according to described red-light LED module produces described second feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of carrying out described second pressure drop of described red-light LED module, correspond to described second feedback voltage of described red-light LED module with generation; Described first pressure drop according to described green light LED module produces described first feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of carrying out described first pressure drop of described green light LED module, correspond to described first feedback voltage of described green light LED module with generation; Described second pressure drop according to described green light LED module produces described second feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of carrying out described second pressure drop of described green light LED module, correspond to described second feedback voltage of described green light LED module with generation; Described first pressure drop according to described blue-ray LED module produces described first feedback voltage that corresponds to described blue-ray LED module, be the signal processing and amplifying of carrying out described first pressure drop of described blue-ray LED module, correspond to described first feedback voltage of described blue-ray LED module with generation; Described second pressure drop according to described blue-ray LED module produces described second feedback voltage that corresponds to described blue-ray LED module, be the signal processing and amplifying of carrying out described second pressure drop of described blue-ray LED module, correspond to described second feedback voltage of described blue-ray LED module with generation; Described the 3rd pressure drop according to described red-light LED module produces described the 3rd feedback voltage that corresponds to described red-light LED module, be the signal processing and amplifying of carrying out described the 3rd pressure drop of described red-light LED module, correspond to described the 3rd feedback voltage of described red-light LED module with generation; Described the 3rd pressure drop according to described green light LED module produces described the 3rd feedback voltage that corresponds to described green light LED module, be the signal processing and amplifying of carrying out described the 3rd pressure drop of described green light LED module, correspond to described the 3rd feedback voltage of described green light LED module with generation; And described the 3rd feedback voltage that corresponds to described blue-ray LED module according to described the 3rd pressure drop generation of described blue-ray LED module, be the signal processing and amplifying of carrying out described the 3rd pressure drop of described blue-ray LED module, correspond to described the 3rd feedback voltage of described blue-ray LED module with generation.

23. color control method according to claim 20, wherein according to described first drive current of the described first work period control signal modulation, according to described second drive current of the described second work period control signal modulation, and according to described the 3rd drive current of described the 3rd work period control signal modulation, be that work period according to the described first work period control signal modulation, one first pulse wave width modulation signal is with described first drive current of modulation, according to work period of the described second work period control signal modulation, one second pulse wave width modulation signal with described second drive current of modulation, and according to work period of described the 3rd work period control signal modulation 1 the 3rd pulse wave width modulation signal with described the 3rd drive current of modulation.

24. color control method according to claim 20 also comprises:

One the 4th pressure drop according to described red-light LED module produces one the 4th feedback voltage that corresponds to described red-light LED module;

According to described the 4th feedback voltage that corresponds to described red-light LED module, described first feedback voltage, described second feedback voltage, described first group of CIE tristimulus values, and described second group of CIE tristimulus values, produce one the 4th group of CIE tristimulus values that corresponds to described red-light LED module;

One the 4th pressure drop according to described green light LED module produces one the 4th feedback voltage that corresponds to described green light LED module;

According to described the 4th feedback voltage that corresponds to described green light LED module, described first feedback voltage, described second feedback voltage, described first group of CIE tristimulus values, and described second group of CIE tristimulus values, produce one the 4th group of CIE tristimulus values that corresponds to described green light LED module;

One the 4th pressure drop according to described blue-ray LED module produces one the 4th feedback voltage that corresponds to described blue-ray LED module;

According to described the 4th feedback voltage that corresponds to described blue-ray LED module, described first feedback voltage, described second feedback voltage, described first group of CIE tristimulus values, and described second group of CIE tristimulus values, produce one the 4th group of CIE tristimulus values that corresponds to described blue-ray LED module;

According to described the 4th group of CIE tristimulus values that corresponds to described red-light LED module, described the 4th group of CIE tristimulus values that corresponds to described green light LED module, described the 4th group of CIE tristimulus values that corresponds to described blue-ray LED module, and the default CIE tristimulus values of this group, calculate one the 4th work period control signal, one the 5th work period control signal, reach one the 6th work period control signal; And

According to described first drive current of described the 4th work period control signal modulation, according to described second drive current of described the 5th work period control signal modulation, and according to described the 3rd drive current of described the 6th work period control signal modulation.

25. color control method according to claim 24, wherein according to described first drive current of described the 4th work period control signal modulation, according to described second drive current of described the 5th work period control signal modulation, and according to described the 3rd drive current of described the 6th work period control signal modulation, be that work period according to described the 4th work period control signal modulation one first pulse wave width modulation signal is with described first drive current of modulation, according to work period of described the 5th work period control signal modulation one second pulse wave width modulation signal with described second drive current of modulation, and according to work period of described the 6th work period control signal modulation 1 the 3rd pulse wave width modulation signal with described the 3rd drive current of modulation.

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