WO2008061560A1

WO2008061560A1 - Coloured lamp and method for generating coloured light with a predefined colour locus using a lamp

Info

Publication number: WO2008061560A1
Application number: PCT/EP2006/068752
Authority: WO
Inventors: Matthias Schneider
Original assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
Priority date: 2006-11-22
Filing date: 2006-11-22
Publication date: 2008-05-29

Abstract

Future DALI systems will enable the colour locus of a lamp to be specified. The invention relates to a lamp which can be driven with such a novel type of protocol. Instead of connecting electronic ballast devices of individual lamps directly to the DALI bus, a central coloured light controller (22) is provided which, according to a vector received via a DALI input (20) for the target colour locus, drives electronic ballast devices (14) that are respectively connected to a lamp (12). The central coloured light controller (22) calculates the control signals in such a way that the light from the individual lamps (12) is mixed in such a way that the mixed light (18) has the desired colour locus. A colour sensor (26) is used to help determine the initial configuration and can also be used in a later regulation of the colour locus of the mixed light (18).

Description

description

Color light and method for producing colored light having a predetermined color location by a luminaire

Technical area

The invention relates to a color lamp. It also relates to a method for producing colored light having a predetermined color location by a luminaire.

State of the art

The point here is to optimally exploit the possibilities offered by DALI systems. DALI stands for "digital addressable light interface", ie digital ad ^¬ ressierbare light interface. The DALI protocol is tailor-made for the control of luminaires. Typically, an electronic ballast (ECG) in a luminaire is used to implement the DALI protocol in Steuersigna ^¬ le for a lamp. Currently, a Wei ^¬ terentwicklung the DALI protocol is operated, which should make it through the DALI protocol also requirements concerning the color location of the radiated light to ma ^¬ chen.

Presentation of the invention

The object of the invention bereitzu ^¬ provide a colored light that is the future available ste ^¬ Henden DALI protocol so controlled using a that the Far ^¬ bort of light emitted by their light exactly a default provided by way of the DALI protocol ent ^¬ speaks. The object is achieved by a color lamp with the features according to claim 1 and a method with the features according to claim 6.

The color lamp according to the invention comprises at least two lamps which emit light of different color composition, and to each of which an electronic ballast is assigned, via which the intensity of the light emitted by the respective associated lamp is controllable. The color lamp has a DALI input, via which a control signal for determining a desired color ^¬ location for the mixed light of all the lamps of the color lamp to ^¬ feasible. Furthermore, the color lamp has a central color light control, which is connected to the DALI input on the one hand and the electronic ballasts on the other hand and is designed to from a via the DALI input supplied control signal for establishing a target color location for the light that for Generating mixed light of the lamps with the target color location necessary intensities of the individual lamps to calculate and deliver appropriate control signals to the electronic ballasts.

An essential aspect of this invention is that not the electronic ballasts are controlled directly to ^¬ , but that the central color light control coordinates the control of the lamps via their electronic ballasts. The luminaire can be connected as a whole to a DALI bus via its DALI input, and the lamps, which are supposed to produce a specific mixed light together, no longer have any independence in the face of this functionality, but are to a unit, namely the color lamp, summarized.

In a preferred embodiment of the invention, the color lamp comprises a color sensor which is arranged in the emission area of the lamps (ie in the area where the lamps already produce a mixed light together) and which is connected to the central color light controller. The color sensor is useful for a determination of an input configuration, so to speak as a calibration used. The signals of the color sensor of the central Farblichtsteue ^¬ tion actual values used in a control in which the control signals to the electronic switchgear advantages optionally from an initial configura- guration as being preferred are generated differently.

As already stated, the electronic ballasts are normally designed to be connected directly to the DALI bus. In the present case, this DALI input of the electronic ballasts can be used for the connection of the same with the central color light control. This has the advantage that the electronic ballasts do not have to be specially adapted to the use in the color light. However, since the connection of the central color light controller with the electronic ballasts is provided internally in the color lamp, a control system other than the DALI bus can be used. A very simple system, which makes the electronic ballasts and possibly also the central color light control cost-effective, uses 1-10 V control cables. In the inventive method for generating color light with a predetermined color location by a light by mixing the light of lamps of the luminaire, give light of different color compositions off, the lamps are turned on individually at first in a configuration mode, and thereby is using egg ^¬ nes color sensor the color location of the light emitted by them and their emission intensity measured. In this case, the maximum emission intensity is preferably measured. This can also be indirectly detected and measured so that when the emission intensity is then formed gemes ^¬ sen at a predetermined power control of the lamp and is rückge ^¬ joined to the maximum emission intensity. After completion of the configuration mode signals are collected emp ^¬ in one mode of operation, where appropriate, is dictated by the a color location. At the given color location, intensities of the light to be emitted are calculated for each lamp, and the lamps are controlled such that the light intensity emitted by them is in each case the calculated intensity.

Again, the preferred embodiment is again that the color sensor is active in the operating mode and color locus and intensity of the combined abge ^¬ radiated by the lamps mixed light measures. The measurement results are used to control the intensities radiated by the lamps. The control is particularly useful because the individual lamps often change their radiation behavior after a long period of operation (for example, due to a warming of the lamp), in particular, the intensity of the radiated light changes at a given control signal. To a predetermined Intensity of the emitted light for the lamp to keep it ^¬, must then be correspondingly Corridor ^¬ yaws the control signal.

Also in the method according to the invention, the central color light control has an outstanding role, because it can be used to calculate the intensities of the light to be emitted for each lamp, and it also outputs the control signals for the electronic ballasts of the lamps.

Short description of the drawing

Hereinafter, a preferred embodiment of the invention He ^¬ described with reference to the figure, which schematically illustrates the components of a lamp according to the invention.

Preferred embodiment of the invention

A generally designated 10 color light whose light is to have a defined color comprises three ^Lam¬ pen 12, which emit light of a given Farbzusammenset ^¬ tion, said color composition of lamp 12 to lamp 12 is different. Each lamp 12 is associated with an electronic ballast 14. The lamps 12 with their electronic ballasts 14 form the basic unit of the color lamp 10, which can be referred to as a lamp for colored light, color lamp 16. In the color light 16, it is ensured that the light of the individual lamps 12 is superimposed to form a mixed light 18. The color light 16 as basic unit of the color light 10 does not yet contain the possible Speed, that the exact color of the emitted light, in the present case of the mixed light 18, is defined. This is only possible in the color light 10. First, the color light 10 has a DALI input 20 for this purpose. There are thus control signals according to the DALI protocol supplied. For example, the color locus that the mixed light 18 should have is predefined via the control signals. The locus may be finiert in various ways de ^¬, present the CIE standard colorimetric system or standard color system is used, which is described in Germany in DIN 5033, Part 3 and fixed. The color locus is generally defined by three values, viz. X, y, and z, even for definitions other than those used in the present case, and due to the valid relationship x + y + z = 1, generally only the two color locus values x and y are indicated become. The color location values x and y correspond to coordinates in a coordinate system. The color locus receives its name from a two-dimensional representation of the colors, whereby the three corners of a triangle are determined by the primary colors and the color loci within the triangle result from mixtures of the primary colors corresponding to the color location values x, y and z.

Even if the DALI protocol switching devices elekt ^¬ tronic ballasts on the type of electronic ballast is in principle directly 14 can control, is also a present embodiment enables realized, in which the DALI input 20 is connected to a central color light control 22nd The central color light controller 22 has the ability to receive signals, evaluate and output response signals or control signals. You play, includes a conventional microprocessor with ^¬. The Remote color light controller 22 is now connected to each of the electronic ballasts via a connecting line 24. The connection line can be a DALI bus. Instead of a DALI bus, three connection lines of the type I-10V control lines can also be provided.

Via the connecting line 24, the central color light controller 22, the individual electronic ballasts 14 control. The intensities of the light emitted by the individual lamps 12 must be set in relation to each other, so that the mixed light 18 has the desired color location. The central Farblichtsteu ^¬ augmentation 22 thus must have a piece of information which has color coordinates, the light separately from ^¬ are each lamp 12, NEN to kön- set the color coordinates of the mixed light 18th

A color sensor 26 is in the emission of the lamps 12, where the light emitted from the individual lamps 12 light has been united to form a mixed light 18, disposed ^¬. A color sensor measures color location and intensity. In the figure, it is indicated that the color sensor outputs the color location values x, y and the unnormalized component of the colorimetry Y at its output. It is not notwendigerwei ^¬ se so that the color sensor has to measure these quantities exactly. Frequently, the color sensor will also measure the quantities X, Y and Z, which in their total give the intensity. Depending ^¬ de one of these variables can then by the sum, so by the intensity to be shared, so you x, y and z are thus obtained the respective Farbortwert. Conversely, in addition to the color location values x and y, the intensity I can be measured. By multiplying the color location value y by the intensity I, the unnormalized composition results. As a result, it is important that three quantities are measured by the color sensor, and that three sizes are supplied to the central color light control, it being immaterial whether the color sensor 26 has an intelligence (for example a microprocessor), which converts the three measured variables in three emitted at its outputs, or whether the Eigent ^¬ Liche data processing is located in the central color light control 22nd The color sensor 26 is in any case connected to the central color light controller 22 via a connecting line 28, via which a color sensor signal is output, which has three independent data components.

So that the central color light controller 22 can calculate the control signals to be output via the connection line 24, the basic data necessary for this purpose are first determined in a configuration mode. In Configu ^¬ rationsmodus each of the lamps 12 is individually turned switched OFF ^¬, and the color sensor 26 measures the three components and sends these via the connection line 28 to the central ^¬ rale color light control 22. From each of the lamps 12 is thus the color locus and at a given Dim setting radiated light intensity known.

If x _n , y _n , z _{n are} the color location values for the three lamps n = 1, 2, 3, it is possible to form a 3 × 3 matrix S from the color location values:

X ₁ X,

S = yi y ₂ y ₃ : D

This matrix S will be used in the further process Is the intensity I _n of the individual lamps n = l, 2,3 do not individually measured directly, it results from Y _n (the un- normalized component of the color sensor) and y _n entspre ^¬ accordingly the formula:

I _n = ^. (2) y _π

From the components X _n , Y _n and Z _n , it results according to the formula:

I _n = X _{n +} Y _{n +} Z _n . (3)

Now the configuration mode can be ended, because the basic data for the further procedure are available.

In an operating mode, a color location x, y is first received via the DALI bus. From the three color locus values x, y and z (with z = l-x-y), one can use the inodes of the matrix S formed above,

M = S- ¹ , (4)

the intensities of the lights u _n components calculate that they must have, so that the mixed light 18 to ge ^¬ desired color point x, y has. The following applies:

It should be noted that one of the variables u _n can become negative. If this happens, the color locus with the color location values x, y and z can not be reached with the existing luminaire. In the next step, the variables u _n, representing the absolute values of the above mentioned it also ^¬ mediated individual intensities I _n of the lamps normalized, obtaining corrected intensity ratios v _n correspondingly to the formula:

U _n

: 6) L

or expressed with the components m _{Ωrl of} the matrix M:

v = ^m n, l + ^m ^X n, 2 y ^m + n, ^Z 3: 7)

The color light is in the present case via a dimmer (not shown in the figure) adjustable in their brightness.

The dimmer specifies a dimming value d, with

O≤d≤l. If no dimmer is present, the value d can also be preset via the DALI bus, so that the central color light controller 22 receives it via the input 20.

The dimming positions d _n for each of the individual lamps 12 are then determined from the corrected intensity ratio v _n , where again 0≤d _n ≦ l. Advantageously, d _{n is} defined according to the formula:

d _n = - d. ( 8th )

HIaX (V _{1 5} V ₂₅ V ₃ )

The dimming d _n is exactly what the central ink ^¬ lighting control must set 22 via the control signal that is sent to each of the electronic ballasts 14 via the connection line 24th If each of the lamps 12 is switched on according to the respective dimming position d _n provided, the color location of the mixed light 18 corresponds exactly to the desired color location.

This basically achieves the desired goal.

In addition, the invention can also continue to use the color sensor 26 in the operating mode. Is reason that this can be useful that the one ^¬ individual lamps 12 each output intensity I _n at ^¬ ground of heating of the lamps can vary 12 and thus not the same I _n remains as determined above. Since I _n entered into the above determination of the dimming position I _n , the dimming positions d _n must be corrected.

The following applies:

m ", i ^χ _{! Sf} + ^m ", 2y _! + ^m ", 3 ^Z ιst

"is: 9)

Now you have to calculate a v, with)

This yields: m " ₁ x + m" ₂ y + m " ₃ zn, new n is ^* ^ 'm", i ^χ _{! Sf} + ^m ", 2y _{! Sf} + ^m ", 3 ^z _{! Sf}

Due to the new intensity ratio v _ _n _new can in a corresponding application of the above formula (8) for d _n each new position d _n _ are _{redetermined,} the 22 then emits the central color light control. d _{n new} can be defined almost constantly within the framework of a control of the central color light control 22, so that the color of the Mixed light 18 preferably only infinitesimal changes and the system immediately interferes with such a change regulatory.

Claims

claims

1. color lamp (10), with at least two lamps (12), the light of different color composition, and each of which an electronic ballast (14) is assigned, via which the intensity of abge from the respective associated lamp abge ^¬ radiated Light is controllable, wherein the color light (10) has a DALI input (20) via which a control signal for determining a target color location for the mixed light (18) of all lamps of the color light (10) can be supplied, and wherein the color light ( 10) further comprises a central color light control (22), which is connected to the DALI input (20) on the one hand and the electronic ^¬ nischen ballasts (14) on the other hand and is designed to from a via the DALI input (20) supplied control signal to set a target color location for the luminaire to calculate the intensities of the individual lamps (12) necessary for generating mixed light (18) of the lamps with the desired color location and corresponding control signal to the electronic ballasts (14).

2. color lamp (10) according to claim 1, with a color sensor (26) in the emission region of the lamps (12), which is connected to the central color light controller (22).

3. color light (10) according to claim 2, wherein the central Ie color light control (22) is adapted to the

Control signals to the electronic ballasts (14) in response to signals from the color sensor (26) to regulate.

4. Color light according to one of claims 1 to 3, wherein the central color light controller (22) to the electronic ballasts (14) via an internal DALI bus line (24) is connected.

5. Color light according to one of claims 1 to 3, wherein the central color light control (22) with the electronic ballasts (14) via internal 1-10V control lines (24) is connected.

6. A method for producing colored light with a predetermined color location by a luminaire (10) by mixing the light of lamps (12) of the luminaire (10), which emit light of different color composition, wherein in the first method in a configura ^¬ tion mode the lamps (12) are turned on individually and the use of a color sensor (26) of the color point of light emitted from them light and their from ^¬ beam intensity are measured, and then in a mode of operation to the predetermined color coordinates intensity with ^¬ th of the radiated light for each lamp (12) are calculated and the lamps (12) are driven so that the light emitted by them Lichtintensi ^¬ ty is in each case the calculated intensity.

7. The method of claim 6, wherein the color sensor

(26) is active in the operating mode and measures the chromaticity and intensity of the mixed light (18) emitted by the lamps, the measurement results being used to control the intensities radiated by the lamps (12).

8. The method according to claim 6 or 7, wherein the respective calculation of the intensities of the light to be emitted for each lamp (12) by a central color ^¬ light control (22) takes place, the corresponding control ersignale for electronic ballasts (14) of the lamps ( 12).