CN201119078Y - Color temperature adjustable luminescent device - Google Patents
Color temperature adjustable luminescent device Download PDFInfo
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- CN201119078Y CN201119078Y CNU2007201957190U CN200720195719U CN201119078Y CN 201119078 Y CN201119078 Y CN 201119078Y CN U2007201957190 U CNU2007201957190 U CN U2007201957190U CN 200720195719 U CN200720195719 U CN 200720195719U CN 201119078 Y CN201119078 Y CN 201119078Y
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Abstract
The utility model relates to an illuminating device with adjustable color temperature. The illuminating device with adjustable color temperature comprises a signal control circuit, an isolating circuit, a current driving circuit, light emitting diodes and a protection and control circuit. The current driving circuit is accurately controlled through control signals outputted by the signal control circuit in the utility model; negative feedback signals are separated through the isolating circuit, thus the control signals outputted by an interfering signal control circuit can be avoided; the light emitting diodes can be protected from being damaged because of the excess current through the protection and control circuit. A plurality of light emitting diodes are controlled through the signal control circuit to ensure the light emitting diodes of different colors to reach the anticipated color temperatures after the light is mixed, and the signal control circuit can accurately control the current driving circuit to ensure the light emitting diodes to accurately produce the required light intensity and to easily control the color temperature of the illuminating device.
Description
Technical field
The utility model relates to a kind of light-emitting device of adjustable color temperature, particularly relates to a kind of light-emitting device that is applied to adjust the adjustable color temperature of light-emitting diode colour temperature.
Background technology
Along with the continuous growth and the progress of led technology, its range of application also little by little is popularized in the daily life, for example the module backlight of display and normal lighting or the like.When being applied to normal lighting, in response to various different user demands, how suitably and exactly to adjust the colour temperature of light-emitting diode so that the user light-emitting diode can be applied in various occasions and the environment be considerable.
And have red light emitting diodes, green LED, and the light emitting diode matrix of blue LED be example, have the light-emitting device of known adjustable color temperature now, be to utilize a plurality of control die set to adjust red light emitting diodes, green LED, and the electric current of blue LED conducting respectively, and then adjust red light emitting diodes, green LED, and the luminous intensity of blue LED, make mixed light can reach required colour temperature.
But, the control die set of the light-emitting device of this kind adjustable color temperature, not only accurate inadequately for the control of the size of current of conducting, cause the change of electric current easily, and make light-emitting diode be difficult to reach desired colour temperature, also make the situation of light-emitting diode generation light and shade flicker easily, and a control circuit only can control light-emitting diode of the same colour, also significantly improve manufacturing cost.
The light-emitting device of another adjustable color temperature, for utilizing white light emitting diode collocation red light-emitting diode or Yellow light emitting diode, the light that sends by this red light-emitting diode or Yellow light emitting diode is adjusted the colour temperature of white light emitting diode, but its reference color temperature that can adjust limits to some extent, for example only can adjust in 2,500K to 5 between the 000K, and can't be widely used in various situations and the occasion.
This shows that the light-emitting device of above-mentioned existing adjustable color temperature obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.For solving the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of light-emitting device of novel adjustable color temperature, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that the light-emitting device of above-mentioned existing adjustable color temperature exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of light-emitting device of novel adjustable color temperature, can improve the light-emitting device of general existing adjustable color temperature, make it have more practicality.Through constantly research, design, and, create the utility model that has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
The purpose of this utility model is, overcome the defective of the light-emitting device existence of existing adjustable color temperature, and provide a kind of light-emitting device of adjustable color temperature of new structure, technical problem to be solved is that to make it (be signal by signal, this paper all is called signal) control circuit controls a plurality of light-emitting diodes, make colour temperature behind the light-emitting diode mixed light of different colours can reach the colour temperature of expection, and signal control circuit is the Control current drive circuit exactly, make its current signal of exporting specific size in order to the driven for emitting lights diode, and and then make light-emitting diode produce required luminous intensity exactly, in order to control the colour temperature of light-emitting device easily, be very suitable for practicality.
The purpose of this utility model and to solve its technical problem be to adopt following technical scheme to realize.Light-emitting device according to a kind of adjustable color temperature that the utility model proposes, it comprises: a signal (signal) control circuit, it has one first control signal output ends at least in order to exporting one first control signal, and one second control signal output ends is in order to export one second control signal; One first buffer circuit, its input telecommunication is connected in this first control signal output ends; One first current driving circuit, its input are the outputs that telecommunication is connected in this first buffer circuit; At least one first light-emitting diode, its anode are the outputs that telecommunication is connected in this first current driving circuit; One first protection control circuit, it is series between the negative electrode and a ground connection node of this first light-emitting diode, and telecommunication is feedback in the input of this first current driving circuit; One second buffer circuit, its input are that telecommunication is connected in this second control signal output ends; One second current driving circuit, its input are the outputs that telecommunication is connected in this second buffer circuit; At least one second light-emitting diode, its anode are the outputs that telecommunication is connected in this second current driving circuit; And one second the protection control circuit, it is series between the negative electrode and this ground connection node of this second light-emitting diode, and telecommunication is feedback in the input of this second current driving circuit.
The purpose of this utility model and solve its technical problem and can also be able to be further achieved by the following technical measures.
The light-emitting device of aforesaid adjustable color temperature, the colour temperature behind wherein said first light-emitting diode and this second light-emitting diode mixed light is between 1,500K to 20 is between the 000K.
The light-emitting device of aforesaid adjustable color temperature, wherein said signal control circuit are a pulse width modulation circuit.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one first pulse signal control circuit, its input is that telecommunication is connected in this first control signal output ends, and the output of this first pulse signal control circuit is the input that telecommunication is connected in this first buffer circuit.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one first noise filtering circuit, it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one first inductance, it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one second pulse signal control circuit, its input is that telecommunication is connected in this second control signal output ends, and its output is the input that telecommunication is connected in this second buffer circuit.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one second noise filtering circuit, it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one second inductance, it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, wherein said first light-emitting diode is a green light LED, this second light-emitting diode then is a red light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, wherein said first light-emitting diode is a Yellow light emitting diode, this second light-emitting diode then is a blue light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, wherein said first light-emitting diode is a white light emitting diode, this second light-emitting diode then is color luminous diode.
The purpose of this utility model and solve its technical problem and also realize by the following technical solutions.Light-emitting device according to a kind of adjustable color temperature that the utility model proposes, it comprises: a signal control circuit, and it has one first control signal output ends at least in order to export one first control signal, one second control signal output ends in order to export one second control signal, to reach one the 3rd control signal output ends in order to export one the 3rd control signal; One first buffer circuit, its input are that telecommunication is connected in this first control signal output ends; One first current driving circuit, its input are the outputs that telecommunication is connected in this first buffer circuit; At least one first light-emitting diode, its anode are the outputs that telecommunication is connected in this first current driving circuit; One first protection control circuit, it is series between the negative electrode and a ground connection node of this first light-emitting diode, and telecommunication is feedback in the input of this first current driving circuit; One second buffer circuit, its input are that telecommunication is connected in this second control signal output ends; One second current driving circuit, its input are the outputs that telecommunication is connected in this second buffer circuit; At least one second light-emitting diode, its anode are the outputs that telecommunication is connected in this second current driving circuit; One second protection control circuit, it is series between the negative electrode and this ground connection node of this second light-emitting diode, and telecommunication is feedback in the input of this second current driving circuit; One the 3rd buffer circuit, its input are that telecommunication is connected in the 3rd control signal output ends; One the 3rd current driving circuit, its input are the outputs that telecommunication is connected in the 3rd buffer circuit; At least one the 3rd light-emitting diode, its anode are the outputs that telecommunication is connected in the 3rd current driving circuit; And one the 3rd the protection control circuit, it is series between the negative electrode and this ground connection node of the 3rd light-emitting diode, and telecommunication is feedback in the input of the 3rd current driving circuit.
The purpose of this utility model and solve its technical problem and can also be able to be further achieved by the following technical measures.
The light-emitting device of aforesaid adjustable color temperature, the colour temperature behind wherein said first light-emitting diode, this second light-emitting diode and the 3rd light-emitting diode mixed light is between 1,500K to 20 is between the 000K.
The light-emitting device of aforesaid adjustable color temperature, wherein said signal control circuit are a pulse width modulation circuit.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one first pulse signal control circuit, its input is that telecommunication is connected in this first control signal output ends, and the output of this first pulse signal control circuit is the input that telecommunication is connected in this first buffer circuit.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one first noise filtering circuit, it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one first inductance, it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one second pulse signal control circuit, its input is that telecommunication is connected in this second control signal output ends, and its output is the input that telecommunication is connected in this second buffer circuit.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one second noise filtering circuit, it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one second inductance, it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one the 3rd pulse signal control circuit, its input is that telecommunication is connected in the 3rd control signal output ends, and the output of the 3rd pulse signal control circuit is the input that telecommunication is connected in the 3rd buffer circuit.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one the 3rd noise filtering circuit, it is series between the anode of the output of the 3rd current driving circuit and the 3rd light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, it further comprises one the 3rd inductance, it is series between the anode of the output of the 3rd current driving circuit and the 3rd light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, wherein said first light-emitting diode are that green light LED, this second light-emitting diode are red light-emitting diode, and the 3rd light-emitting diode then is a blue light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, wherein said first light-emitting diode is a green light LED, this second light-emitting diode then is a red light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, wherein said first light-emitting diode is a Yellow light emitting diode, this second light-emitting diode then is a blue light-emitting diode.
The light-emitting device of aforesaid adjustable color temperature, wherein said first light-emitting diode is a white light emitting diode, this second light-emitting diode and the 3rd light-emitting diode then are color luminous diode.
The utility model compared with prior art has tangible advantage and beneficial effect.By technique scheme, the light-emitting device of the utility model adjustable color temperature has following advantage and beneficial effect at least:
1, the utility model is by the control signal of signal control circuit output, Control current drive circuit exactly.
2, in addition, isolate the negative feedback signal, can avoid interference the control signal of signal control circuit output by buffer circuit.
3 moreover, by the protection control circuit, can protect light-emitting diode to avoid excessive current and impaired.
In sum, the utility model is the light-emitting device of relevant a kind of adjustable color temperature.This light-emitting device comprises: signal control circuit, buffer circuit, current driving circuit, light-emitting diode and protection control circuit.The utility model utilizes signal control circuit to control a plurality of current driving circuits, make its driven for emitting lights diode respectively, because signal control circuit can accurately be controlled a plurality of light-emitting diodes simultaneously, so colour temperature behind the light-emitting diode mixed light of may command different colours, make it can operate in 1,500K to 20 is between the reference color temperature of 000K.The utility model is controlled a plurality of light-emitting diodes by signal control circuit, make colour temperature behind the light-emitting diode mixed light of different colours can reach the colour temperature of expection, and signal control circuit is the Control current drive circuit exactly, make its current signal of exporting specific size in order to the driven for emitting lights diode, and and then can make light-emitting diode produce required luminous intensity exactly, in order to control the colour temperature of light-emitting device easily.The utlity model has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and the light-emitting device of more existing adjustable color temperature has the outstanding effect of enhancement, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the schematic diagram one of a kind of embodiment of the utility model adjustable color temperature light-emitting device.
Fig. 2 is the schematic diagram two of a kind of embodiment of the utility model adjustable color temperature light-emitting device.
Fig. 3 is the schematic diagram three of the another kind of embodiment of the utility model adjustable color temperature light-emitting device.
Fig. 4 is the schematic diagram four of the another kind of embodiment of the utility model adjustable color temperature light-emitting device.
100: adjustable color temperature light-emitting device 100 ': the adjustable color temperature light-emitting device
101: 102: the first buffer circuits of signal control circuit
104: the first light-emitting diodes of 103: the first current driving circuits
106: the second buffer circuits of 105: the first protection control circuits
108: the second light-emitting diodes of 107: the second current driving circuits
110: the first pulse signal control circuits of 109: the second protection control circuits
112: the second pulse signal control circuits of 111: the first noise filtering circuits
114: the three buffer circuits of 113: the second noise filtering circuits
116: the three light-emitting diodes of 115: the three current driving circuits
118: the three pulse signal control circuits of 117: the three protection control circuits
119: the three noise filtering circuits 200: adjustable color temperature light-emitting device
200 ': adjustable color temperature light-emitting device Ctrl1: first control signal
Ctrl2: the second control signal Ctrl3: the 3rd control signal
D1: the first diode D2: second diode
D3: the 3rd diode R1: first resistance
R2: 3: the three resistance of second resistance R
R4: 5: the five resistance of the 4th resistance R
R6: 7: the seven resistance of the 6th resistance R
R8: 9: the nine resistance of the 8th resistance R
R10: 11: the 11 resistance of the tenth resistance R
R12: 13: the 13 resistance of the 12 resistance R
R14: 15: the 15 resistance of the 14 resistance R
T1: the first electric crystal T2: second electric crystal
T3: the 3rd electric crystal L1: first inductance
L2: 3: the three inductance of second inductance L
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to light-emitting device and embodiment, structure, feature and effect thereof according to the adjustable color temperature that the utility model proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present utility model can clearly present in the following detailed description that cooperates with reference to graphic preferred embodiment.Explanation by embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the utility model, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the utility model is limited.
＜the first embodiment 〉
See also Fig. 1, shown in Figure 2, Fig. 1 is the embodiment schematic diagram one of a kind of adjustable color temperature light-emitting device 100 of the present utility model, and Fig. 2 is the embodiment schematic diagram two of a kind of adjustable color temperature light-emitting device 100 ' of the present utility model.
See also shown in Figure 1; a kind of adjustable color temperature light-emitting device 100 of the utility model preferred embodiment; it comprises: a signal (being signal) control circuit 101, one first buffer circuit 102, one first current driving circuit 103, at least one first light-emitting diode 104, one first protection control circuit 105, one second buffer circuit 106, one second current driving circuit 107, at least one second light-emitting diode 108, and one second protection control circuit 109.
Above-mentioned signal (signal) control circuit 101, it can be a pulse width modulation (Pulse WidthModulation, PWM) circuit, have one first control signal output ends in order to exporting one first control signal Ctrl1, and one second control signal output ends is in order to export one second control signal Ctrl2.Because of the characteristics of pulse width modulation circuit are exported for the control signal that produces programmed, so the first control signal Ctrl1 and the second control signal Ctrl2 are controlled in programmed, in order to control first current driving circuit 103 and second current driving circuit 107 exactly.
The first above-mentioned buffer circuit 102, its input is first control signal output ends that telecommunication is connected in signal control circuit 101, in order to isolate the negative feedback signal, avoid the first control signal Ctrl1 of negative feedback signal interference signal control circuit 101 outputs, and then avoid first current driving circuit 103 to judge the first control signal Ctrl1 that is received by accident, and make first current signal of current driving circuit 103 output errors of winning.
The first above-mentioned buffer circuit 102, it can comprise: one first diode D1 and one first resistance R 1; Wherein, this first diode D1, its anode are that telecommunication is connected in first control signal output ends; And this first resistance R 1, the one end is the negative electrode that telecommunication connects the first diode D1, the other end then telecommunication is connected in the input of first current driving circuit 103.
The first above-mentioned current driving circuit 103; its input is the output that telecommunication is connected in first buffer circuit 102; this first current driving circuit 103 receives the negative feedback signal of the first control signal Ctrl1 and the first protection control circuit generation; and produce one first current signal according to the control of the first control signal Ctrl1; the size of current that first current signal is produced is can be between 0.35 ampere to 0.7 ampere; and the negative feedback signal is to produce too high electric current in order to first current signal of avoiding 103 outputs of first current driving circuit, and the light-emitting diode 104 of winning can't be loaded.
The first above-mentioned light-emitting diode 104, its anode is that telecommunication is connected in the output of first current driving circuit 103 and receives first current signal, in order to drive first light-emitting diode 104, make the light-emitting diode 104 of winning to produce the different light intensity degree according to first current signal, for example can set the first control signal Ctrl1 and make the first specific current signal of first current driving circuit, 103 outputs, and then adjust the luminous intensity that first light-emitting diode 104 sends.
The first above-mentioned protection control circuit 105, it is series between the negative electrode and a ground connection node of first light-emitting diode 104, and telecommunication is feedback in the input of first current driving circuit 103.This first protection control circuit 105 is in order to protecting first light-emitting diode 104, and negative feedback signal to the first current driving circuit 103 is provided, and then can avoid too high electric current to damage first light-emitting diode 104.
This first protection control circuit 105, it can comprise: one second resistance R 2 and one the 3rd resistance R 3; Wherein, this second resistance R 2, the telecommunication of one end is connected in the input of first current driving circuit 103, and other end telecommunication is connected in the negative electrode of first light-emitting diode 104; And the 3rd resistance R 3, one end also telecommunication is connected in the negative electrode of first light-emitting diode 104, is connected in the ground connection node and the other end is telecommunication, and can adjusts the resistance value of second resistance R 2 and the 3rd resistance R 3 according to user demand.
In addition, positive edge triggering drives and negative edge triggers two kinds of drivings because of first current driving circuit 103 can be divided into, therefore be converted to the control signal of suitable potential for the first control signal Ctrl1 with signal control circuit 101 outputs, present embodiment can further comprise one first pulse signal control circuit 110.See also shown in Figure 2, the input of this first pulse signal control circuit 110 is that telecommunication is connected in first control signal output ends, and its output is the input that telecommunication is connected in first buffer circuit 102, can will be converted to the first control signal Ctrl1 of high potential originally for the first control signal Ctrl1 of electronegative potential.
This first pulse signal control circuit 110, it can comprise: one the 4th resistance R 4, one first electric crystal T1 and one the 5th resistance R 5; Wherein, the 4th resistance R 4, the telecommunication of one end is connected in first control signal output ends and the other end is telecommunication is connected in the base stage of the first electric crystal T1; And this first electric crystal T1 is a NPN electric crystal, and its emitter-base bandgap grading is that telecommunication is connected in the ground connection node, and its collection utmost point is the input that telecommunication is connected in first buffer circuit 102 again; And the 5th resistance R 5, the one end is the collection utmost point that telecommunication is connected in the first electric crystal T1, is connected in first control signal output ends and the other end is telecommunication.
Current signal for fear of 103 outputs of first current driving circuit has a little noise again, and then make the light-emitting diode 104 of winning produce unsettled phenomenons such as flickering, therefore present embodiment can further comprise one first noise filtering circuit 111, this first noise filtering circuit 111 can be one first inductance L 1, it is series between the anode of the output of first current driving circuit 103 and first light-emitting diode 104, in order to filter the noise of first current signal, and make first current signal drive first light-emitting diode 104, the phenomenon that first light-emitting diode 104 can not be glimmered with stable output.
Again because signal control circuit 101 has one first control signal output ends and one second control signal output ends, control first light-emitting diode 104 and second light-emitting diode 108 respectively so can export the first control signal Ctrl1 and the second control signal Ctrl2 simultaneously, the above-mentioned luminous intensity of how having described by signal control circuit 101 controls first light-emitting diode 104, and the control of this second light-emitting diode 108 is similarly according to identical control principle, therefore give unnecessary details no longer in detail, below only describe circuit connecting relation between each element.
The second above-mentioned buffer circuit 106, its input are second control signal output ends that telecommunication is connected in signal control circuit 101, this second buffer circuit 106, and it comprises one second diode D2 and one the 6th resistance R 6; Wherein, this second diode D2, its anode are that telecommunication is connected in second control signal output ends; And the 6th resistance R 6, the one end is the negative electrode that telecommunication connects the second diode D2, the other end then telecommunication is connected in the input of second current driving circuit 107.
The second above-mentioned current driving circuit 107; its input is the output that telecommunication is connected in second buffer circuit 106; this second current driving circuit 107 is the negative feedback signals that receive the second control signal Ctrl2 and 109 generations of the second protection control circuit; and producing one second current signal according to the control of the second control signal Ctrl2, the size of current that this second current signal is produced is can be between 0.35 ampere to 0.7 ampere.
The second above-mentioned light-emitting diode 108, its anode is that telecommunication is connected in the output of second current driving circuit 107 and receives second current signal, in order to drive second light-emitting diode 108, make second light-emitting diode 108 to produce the different light intensity degree according to second current signal, for example can set the second control signal Ctrl2 and make the second specific current signal of second current driving circuit, 107 outputs, and then adjust the luminous intensity that second light-emitting diode 108 sends.
The second above-mentioned protection control circuit 109, it is series between the negative electrode and ground connection node of second light-emitting diode 108, and telecommunication is feedback in the input of second current driving circuit 107.This second protection control circuit 109, it comprises one the 7th resistance R 7 and one the 8th resistance R 8; Wherein, the 7th resistance R 7, the one end is the input that telecommunication is connected in second current driving circuit 107, is connected in the negative electrode of second light-emitting diode 108 and the other end is telecommunication; And the 8th resistance R 8, one end also telecommunication is connected in the negative electrode of second light-emitting diode 108, is connected in the ground connection node and the other end is telecommunication, and can adjusts the resistance value of the 7th resistance R 7 and the 8th resistance R 8 according to user demand.
In addition, the second same current driving circuit 107 also can be divided into positive edge triggering driving and negative edge triggers two kinds of drivings, therefore be converted to the control signal of suitable potential for the second control signal Ctrl2 with signal control circuit 101 outputs, present embodiment may further include one second pulse signal control circuit 112.As shown in Figure 2, this second pulse signal control circuit 112, its input is that telecommunication is connected in second control signal output ends, and its output is the input that telecommunication is connected in second buffer circuit 106, can will be converted to the second control signal Ctrl2 of high potential originally for the second control signal Ctrl2 of electronegative potential.
This second pulse signal control circuit 112 can comprise: one the 9th resistance R 9, one second electric crystal T2 and 1 the tenth resistance R 10; Wherein, the 9th resistance R 9, the one end is that telecommunication is connected in second control signal output ends and the other end is telecommunication is connected in the base stage of the second electric crystal T2; And this second electric crystal T2 is a NPN electric crystal, and its emitter-base bandgap grading is that telecommunication is connected in the ground connection node, and its collection utmost point is the input that telecommunication is connected in second buffer circuit 106 again; And the tenth resistance R 10, the one end is the collection utmost point that telecommunication is connected in the second electric crystal T2, is connected in second control signal output ends and the other end is telecommunication.
Current signal for fear of 107 outputs of second current driving circuit has a little noise again, and then make second light-emitting diode 108 produce unsettled phenomenons such as flickering, therefore present embodiment can further comprise one second noise filtering circuit 113, this second noise filtering circuit 113 can be one second inductance L 2, it is series between the anode of the output of second current driving circuit 107 and second light-emitting diode 108, in order to filter the noise of second current signal, and make second current signal drive second light-emitting diode 108 with stable output, the phenomenon that second light-emitting diode 108 can not be glimmered.
Present embodiment is by signal control circuit 101, can control the characteristics of first current driving circuit 103 and second current driving circuit 107 exactly, precisely control the luminous intensity of first light-emitting diode 104 and second light-emitting diode 108 respectively, and then adjust the mixed colour temperature of light; Wherein, the selection of this of present embodiment first light-emitting diode 104 and second light-emitting diode 108, can be green light LED red light-emitting diode or the Yellow light emitting diode collocation blue light-emitting diode of arranging in pairs or groups, again or the white light emitting diode color luminous diode of arranging in pairs or groups.Owing to be the collocation that utilizes various light-emitting diode, so can produce the light of different-colour, the adjustable reference color temperature of present embodiment is between 1,500K to 20, between the 000K, and can be applied to according to user's demand in various situation and the occasion.
For instance, when if first light-emitting diode 104 is red light-emitting diode for green light LED second light-emitting diode 108, by numerical value is that 80% the first control signal Ctrl1 and numerical value are 29% the second control signal Ctrl2, can make first current signal of first current driving circuit 103 and 107 outputs of second current driving circuit and the current output value of second current signal generation be all 0.37 ampere, and then make win light-emitting diode 104 and second light-emitting diode 108 producible 1 behind mixed light, the colour temperature of 500K.
＜the second embodiment 〉
See also Fig. 3, shown in Figure 4, Fig. 3 is the embodiment schematic diagram three of another kind of adjustable color temperature light-emitting device 200 of the present utility model, and Fig. 4 is the embodiment schematic diagram four of another kind of adjustable color temperature light-emitting device 200 ' of the present utility model.
See also shown in Figure 3; in order further to increase by the range of application of first embodiment; the utility model second embodiment provides a kind of light-emitting device 200 of adjustable color temperature again, and it comprises: a signal control circuit 101; one first buffer circuit 102; one first current driving circuit 103; at least one first light-emitting diode 104; one first protection control circuit 105; one second buffer circuit 106; one second current driving circuit 107; at least one second light-emitting diode 108; one second protection control circuit 109; one the 3rd buffer circuit 114; one the 3rd current driving circuit 115; at least one the 3rd light-emitting diode 116 and one the 3rd protection control circuit 117.
The difference of the present embodiment and first embodiment is, the signal control circuit 101 of this second embodiment, has one the 3rd control signal output ends more, in order to exporting one the 3rd control signal Ctrl3, so present embodiment can be controlled first light-emitting diode 104, second light-emitting diode 108 and the 3rd light-emitting diode 116 simultaneously.Because the control principle of first light-emitting diode 104 and second light-emitting diode 108 has been described among above-mentioned first embodiment, and the control principle of the 3rd light-emitting diode 116 also the control principle with first light-emitting diode 104 and second light-emitting diode 108 is identical, therefore present embodiment is only described this and is controlled annexation between each luminous element of the 3rd light-emitting diode 116, and no longer is repeated in this description the control principle of like.
Above-mentioned signal control circuit 101, it has one first control signal output ends at least in order to export one first control signal Ctrl1, one second control signal output ends in order to export one second control signal Ctrl2, and one the 3rd control signal output ends in order to export one the 3rd control signal Ctrl3, this signal control circuit 101 can be a pulse width modulation circuit.
The 3rd above-mentioned buffer circuit 114, its input are the 3rd control signal output ends that telecommunication is connected in signal control circuit 101.The 3rd buffer circuit 114 can comprise one the 3rd diode D3 and 1 the 11 resistance R 11; Wherein, the 3rd diode D3, its anode are that telecommunication is connected in the 3rd control signal output ends; And the 11 resistance R 11, the one end is the negative electrode that telecommunication connects the 3rd diode D3, the other end then telecommunication is connected in the input of the 3rd current driving circuit 115.
The 3rd above-mentioned current driving circuit 115; its input is the output that telecommunication is connected in the 3rd buffer circuit 114; the 3rd current driving circuit 115 is the negative feedback signals that receive the 3rd control signal Ctrl3 and 117 generations of the 3rd protection control circuit; and producing one the 3rd current signal according to the control of the 3rd control signal Ctrl3, the size of current that the 3rd current signal is produced is can be between 0.35 ampere to 0.7 ampere.
The 3rd above-mentioned light-emitting diode 116, its anode is that telecommunication is connected in the output of the 3rd current driving circuit 115 and receives the 3rd current signal, in order to drive the 3rd light-emitting diode 116, make the 3rd light-emitting diode 116 produce the different light intensity degree according to the 3rd current signal, for example, can set the 3rd control signal Ctrl3 and make the 3rd specific current signal of the 3rd current driving circuit 115 outputs, and then adjust the luminous intensity that the 3rd light-emitting diode 116 sends.
The 3rd above-mentioned protection control circuit 117, it is series between the negative electrode and ground connection node of the 3rd light-emitting diode 116, and telecommunication is feedback in the input of the 3rd current driving circuit 115.The 3rd protection control circuit 117, it can comprise 1 the 12 resistance R 12 and 1 the 13 resistance R 13; Wherein, the 12 resistance R 12, the one end is the input that telecommunication is connected in the 3rd current driving circuit 115, is connected in the negative electrode of the 3rd light-emitting diode 116 and the other end is telecommunication; And the 13 resistance R 13, one end also telecommunication is connected in the negative electrode of the 3rd light-emitting diode 116, is connected in the ground connection node and the other end is telecommunication, and can adjusts the resistance value of the 12 resistance R 12 and the 13 resistance R 13 according to user demand.
In addition, same, the 3rd above-mentioned current driving circuit 115, also can be divided into positive edge triggering and drive and bear two kinds of edge triggering drivings, therefore be converted to the control signal of suitable potential for the 3rd control signal Ctrl3 with signal control circuit 101 outputs, present embodiment can further comprise one the 3rd pulse signal control circuit 118.As shown in Figure 4, the 3rd pulse signal control circuit 118, its input is that telecommunication is connected in the 3rd control signal output ends, and its output is the input that telecommunication is connected in the 3rd buffer circuit 114, can will be converted to the 3rd control signal Ctrl3 of high potential originally for the 3rd control signal Ctrl3 of electronegative potential.
The 3rd pulse signal control circuit 118 can comprise 1 the 14 resistance R 14, one the 3rd electric crystal T 3 and 1 the 15 resistance R 15; Wherein, the 14 resistance R 14, the one end is that telecommunication is connected in the 3rd control signal output ends, is connected in the base stage of the 3rd electric crystal T3 and the other end is telecommunication; And the 3rd electric crystal T3 is a NPN electric crystal, and its emitter-base bandgap grading is that telecommunication is connected in the ground connection node, and its collection utmost point is the input that telecommunication is connected in the 3rd buffer circuit 114 again; And the 15 resistance R 15, the one end is the collection utmost point that telecommunication is connected in the 3rd electric crystal T3, is connected in the 3rd control signal output ends and the other end is telecommunication.
Current signal for fear of 115 outputs of the 3rd current driving circuit has a little noise again, and then make the 3rd light-emitting diode 116 produce unsettled phenomenons such as flickering, therefore present embodiment can further comprise one the 3rd noise filtering circuit 119, the 3rd noise filtering circuit 119 can be one the 3rd inductance L 3, it is series between the anode of the output of the 3rd current driving circuit 115 and the 3rd light-emitting diode 116, in order to filter the noise of the 3rd current signal, and make the 3rd current signal drive the 3rd light-emitting diode 116 with stable output, the phenomenon that the 3rd light-emitting diode 116 can not be glimmered.
The selection of first light-emitting diode 104, second light-emitting diode 108 and the 3rd light-emitting diode 116 of present embodiment, be to can be green light LED, red light-emitting diode and blue light-emitting diode, or Yellow light emitting diode, blue light-emitting diode other color luminous diodes of arranging in pairs or groups again, again or white light emitting diode at other color luminous diodes of collocation, wherein the selection of light-emitting diode can be selected arbitrarily and arranges in pairs or groups according to user's demand.
For instance, if first light-emitting diode 104 is a green light LED, second light-emitting diode 108 is a red light-emitting diode, and the 3rd light-emitting diode 116 is when being blue light-emitting diode, by numerical value 63% the first control signal Ctrl1, numerical value is 41% the second control signal Ctrl2, and numerical value is 37% the 3rd control signal Ctrl3, can make the current output value of the current signal generation of each current driving circuit output be all 0.48 ampere, and then make the light-emitting diode 104 of winning, second light-emitting diode 108 and the 3rd light-emitting diode 116 are producible 20 behind mixed light, the colour temperature of 000K.
By knowing by inference among above-mentioned the utility model first embodiment and second embodiment, signal control circuit 101 is not only has two or three control signal output ends, but can have a plurality of control signal output ends, and can control multi-group light-emitting diode simultaneously, make light-emitting diode send different luminous intensities according to different control signals respectively, and then behind mixed light, can produce the colour temperatures of various different height, therefore can contain very wide reference color temperature, it is between 1,500K to 20 is between the reference color temperature of 000K.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art are not in breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (28)
1, a kind of light-emitting device of adjustable color temperature is characterized in that it comprises:
One signal control circuit, it has one first control signal output ends at least in order to exporting one first control signal, and one second control signal output ends is in order to export one second control signal;
One first buffer circuit, its input are that telecommunication is connected in this first control signal output ends;
One first current driving circuit, its input are the outputs that telecommunication is connected in this first buffer circuit;
At least one first light-emitting diode, its anode are the outputs that telecommunication is connected in this first current driving circuit;
One first protection control circuit, it is series between the negative electrode and a ground connection node of this first light-emitting diode, and telecommunication is feedback in the input of this first current driving circuit;
One second buffer circuit, its input are that telecommunication is connected in this second control signal output ends;
One second current driving circuit, its input are the outputs that telecommunication is connected in this second buffer circuit;
At least one second light-emitting diode, its anode are the outputs that telecommunication is connected in this second current driving circuit; And
One second protection control circuit, it is series between the negative electrode and this ground connection node of this second light-emitting diode, and telecommunication is feedback in the input of this second current driving circuit.
2, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that the colour temperature behind wherein said first light-emitting diode and this second light-emitting diode mixed light is between 1, and 500K to 20 is between the 000K.
3, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that wherein said signal control circuit is a pulse width modulation circuit.
4, the light-emitting device of adjustable color temperature as claimed in claim 1, it is characterized in that it further comprises one first pulse signal control circuit, its input is that telecommunication is connected in this first control signal output ends, and the output of this first pulse signal control circuit is the input that telecommunication is connected in this first buffer circuit.
5, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that it further comprises one first noise filtering circuit, and it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
6, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that it further comprises one first inductance, and it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
7, the light-emitting device of adjustable color temperature as claimed in claim 1, it is characterized in that it further comprises one second pulse signal control circuit, its input is that telecommunication is connected in this second control signal output ends, and its output is the input that telecommunication is connected in this second buffer circuit.
8, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that it further comprises one second noise filtering circuit, and it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
9, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that it further comprises one second inductance, and it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
10, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that wherein said first light-emitting diode is a green light LED, and this second light-emitting diode then is a red light-emitting diode.
11, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that wherein said first light-emitting diode is a Yellow light emitting diode, and this second light-emitting diode then is a blue light-emitting diode.
12, the light-emitting device of adjustable color temperature as claimed in claim 1 is characterized in that wherein said first light-emitting diode is a white light emitting diode, and this second light-emitting diode then is color luminous diode.
13, a kind of light-emitting device of adjustable color temperature is characterized in that it comprises:
One signal control circuit, it has one first control signal output ends at least in order to export one first control signal, one second control signal output ends in order to export one second control signal, to reach one the 3rd control signal output ends in order to export one the 3rd control signal;
One first buffer circuit, its input are that telecommunication is connected in this first control signal output ends;
One first current driving circuit, its input are the outputs that telecommunication is connected in this first buffer circuit;
At least one first light-emitting diode, its anode are the outputs that telecommunication is connected in this first current driving circuit;
One first protection control circuit, it is series between the negative electrode and a ground connection node of this first light-emitting diode, and telecommunication is feedback in the input of this first current driving circuit;
One second buffer circuit, its input are that telecommunication is connected in this second control signal output ends;
One second current driving circuit, its input are the outputs that telecommunication is connected in this second buffer circuit;
At least one second light-emitting diode, its anode are the outputs that telecommunication is connected in this second current driving circuit;
One second protection control circuit, it is series between the negative electrode and this ground connection node of this second light-emitting diode, and telecommunication is feedback in the input of this second current driving circuit;
One the 3rd buffer circuit, its input are that telecommunication is connected in the 3rd control signal output ends;
One the 3rd current driving circuit, its input are the outputs that telecommunication is connected in the 3rd buffer circuit;
At least one the 3rd light-emitting diode, its anode are the outputs that telecommunication is connected in the 3rd current driving circuit; And
One the 3rd protection control circuit, it is series between the negative electrode and this ground connection node of the 3rd light-emitting diode, and telecommunication is feedback in the input of the 3rd current driving circuit.
14, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that the colour temperature behind wherein said first light-emitting diode, this second light-emitting diode and the 3rd light-emitting diode mixed light is between 1, and 500K to 20 is between the 000K.
15, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that wherein said signal control circuit is a pulse width modulation circuit.
16, the light-emitting device of adjustable color temperature as claimed in claim 13, it is characterized in that it further comprises one first pulse signal control circuit, its input is that telecommunication is connected in this first control signal output ends, and the output of this first pulse signal control circuit is the input that telecommunication is connected in this first buffer circuit.
17, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that it further comprises one first noise filtering circuit, and it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
18, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that it further comprises one first inductance, and it is series between the anode of the output of this first current driving circuit and this first light-emitting diode.
19, the light-emitting device of adjustable color temperature as claimed in claim 13, it is characterized in that it further comprises one second pulse signal control circuit, its input is that telecommunication is connected in this second control signal output ends, and its output is the input that telecommunication is connected in this second buffer circuit.
20, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that it further comprises one second noise filtering circuit, and it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
21, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that it further comprises one second inductance, and it is series between the anode of the output of this second current driving circuit and this second light-emitting diode.
22, the light-emitting device of adjustable color temperature as claimed in claim 13, it is characterized in that it further comprises one the 3rd pulse signal control circuit, its input is that telecommunication is connected in the 3rd control signal output ends, and the output of the 3rd pulse signal control circuit is the input that telecommunication is connected in the 3rd buffer circuit.
23, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that it further comprises one the 3rd noise filtering circuit, and it is series between the anode of the output of the 3rd current driving circuit and the 3rd light-emitting diode.
24, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that it further comprises one the 3rd inductance, and it is series between the anode of the output of the 3rd current driving circuit and the 3rd light-emitting diode.
25, the light-emitting device of adjustable color temperature as claimed in claim 13, it is characterized in that wherein said first light-emitting diode is that green light LED, this second light-emitting diode are red light-emitting diode, the 3rd light-emitting diode then is a blue light-emitting diode.
26, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that wherein said first light-emitting diode is a green light LED, and this second light-emitting diode then is a red light-emitting diode.
27, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that wherein said first light-emitting diode is a Yellow light emitting diode, and this second light-emitting diode then is a blue light-emitting diode.
28, the light-emitting device of adjustable color temperature as claimed in claim 13 is characterized in that wherein said first light-emitting diode is a white light emitting diode, and this second light-emitting diode and the 3rd light-emitting diode then are color luminous diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201957190U CN201119078Y (en) | 2007-10-26 | 2007-10-26 | Color temperature adjustable luminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201957190U CN201119078Y (en) | 2007-10-26 | 2007-10-26 | Color temperature adjustable luminescent device |
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| CN201119078Y true CN201119078Y (en) | 2008-09-17 |
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| CNU2007201957190U Expired - Fee Related CN201119078Y (en) | 2007-10-26 | 2007-10-26 | Color temperature adjustable luminescent device |
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| CN (1) | CN201119078Y (en) |
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| CN101886757A (en) * | 2009-05-12 | 2010-11-17 | 东芝照明技术株式会社 | Illumination device |
| CN102203495A (en) * | 2008-10-24 | 2011-09-28 | 克利公司 | Array layout for color mixing |
| WO2012075781A1 (en) * | 2010-12-10 | 2012-06-14 | 方方 | Light source system capable of adjusting color temperature |
| CN102734715A (en) * | 2011-04-01 | 2012-10-17 | 上海广茂达光艺科技股份有限公司 | Led ceiling lamp |
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| US9793247B2 (en) | 2005-01-10 | 2017-10-17 | Cree, Inc. | Solid state lighting component |
| US9335006B2 (en) | 2006-04-18 | 2016-05-10 | Cree, Inc. | Saturated yellow phosphor converted LED and blue converted red LED |
| US10295147B2 (en) | 2006-11-09 | 2019-05-21 | Cree, Inc. | LED array and method for fabricating same |
| US11791442B2 (en) | 2007-10-31 | 2023-10-17 | Creeled, Inc. | Light emitting diode package and method for fabricating same |
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| CN102203495A (en) * | 2008-10-24 | 2011-09-28 | 克利公司 | Array layout for color mixing |
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| CN101886757B (en) * | 2009-05-12 | 2012-08-29 | 东芝照明技术株式会社 | Illumination device |
| CN101886757A (en) * | 2009-05-12 | 2010-11-17 | 东芝照明技术株式会社 | Illumination device |
| WO2012075781A1 (en) * | 2010-12-10 | 2012-06-14 | 方方 | Light source system capable of adjusting color temperature |
| US9786811B2 (en) | 2011-02-04 | 2017-10-10 | Cree, Inc. | Tilted emission LED array |
| CN102734715A (en) * | 2011-04-01 | 2012-10-17 | 上海广茂达光艺科技股份有限公司 | Led ceiling lamp |
| US10842016B2 (en) | 2011-07-06 | 2020-11-17 | Cree, Inc. | Compact optically efficient solid state light source with integrated thermal management |
| CN105405414A (en) * | 2016-01-06 | 2016-03-16 | 京东方科技集团股份有限公司 | Backlight and control method and display device thereof |
| US9949342B2 (en) | 2016-01-06 | 2018-04-17 | Boe Technology Group Co., Ltd. | Backlight, control method thereof and display device |
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