WO2007101834A1 - Système d'éclairage et procédé de commande d'un système d'éclairage - Google Patents

Système d'éclairage et procédé de commande d'un système d'éclairage Download PDF

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Publication number
WO2007101834A1
WO2007101834A1 PCT/EP2007/052044 EP2007052044W WO2007101834A1 WO 2007101834 A1 WO2007101834 A1 WO 2007101834A1 EP 2007052044 W EP2007052044 W EP 2007052044W WO 2007101834 A1 WO2007101834 A1 WO 2007101834A1
Authority
WO
WIPO (PCT)
Prior art keywords
light source
temperature
light
detector unit
lighting system
Prior art date
Application number
PCT/EP2007/052044
Other languages
German (de)
English (en)
Inventor
Felix Franck
Andreas Huber
Peter Niedermeier
Oskar Schallmoser
Original Assignee
Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH filed Critical Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
Publication of WO2007101834A1 publication Critical patent/WO2007101834A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/28—Controlling the colour of the light using temperature feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/22—Controlling the colour of the light using optical feedback

Definitions

  • the present invention relates to a lighting system with at least one light source, which can be operated by means of a control and / or regulating circuit. Furthermore, the invention also relates to a method for operating such a lighting system.
  • the present invention is therefore based on the object, a lighting system and a method for
  • a lighting system comprises at least one light source, wherein the light source has at least one temperature-dependent photometric parameter.
  • the lighting system further comprises a control and / or regulating circuit, which is designed to control the photometric characteristic of the light source.
  • the illumination system has at least ei ⁇ ne detector unit, which is designed and arranged for detecting light signals of the light source, wherein a temperature of the detector unit and / or a temperature of the light source can be determined, and dependent on this temperature information and information of the detected Light signals, and thus at least of these two parameters of the temperature information and the light signal information, the regulation of the photometric characteristic of the light source is feasible.
  • the lighting system thus Be ⁇ central parameter in the form of temperature information on the one hand and the detected light signal information on the other hand carried out for an accurate and low-complexity compensation of the light image formed by the illumination system.
  • the desired emis ⁇ sion behavior of the light source and thus the emitted light signals can be achieved in a precise manner, and a relatively simple and inexpensive arrangement of the corresponding components of the system allows become.
  • By capturing and basis important parameters influencing the temperature dependent photo ⁇ metric characteristic of the light source can be very these pre ⁇ zie with respect to a desired emission behavior can be controlled.
  • the temperature of the detector unit or in another embodiment, the temperature of the detector unit and the temperature of the light ⁇ source determined and depending formations of these, temperature-and the information of the detected light signals, the control of the photometric characteristic of the light source feasible.
  • the light source and the detector unit are arranged on a common carrier, in particular a thermally conductive carrier, which is preferably realized by a metallic carrier.
  • a common carrier in particular a thermally conductive carrier, which is preferably realized by a metallic carrier.
  • the temperature of this carrier can be determined as representative of the temperature of the detector unit and / or the light source and that this temperature of the carrier is taken into account for the regulation of the photometric characteristic.
  • the temperature of the support is generally also have a relatively precise indication of the temperature of the light source and / or the detector unit are made possible. By detecting only this one temperature of the carrier thus a low-cost determination of this parameter can be made possible.
  • the light source and the detector unit are not arranged on a common ger Trä ⁇ and both the temperature of the light source ⁇ and the temperature of the detector unit are separate rat detectable. It can also be provided that only the temperature of the detector unit or only the temperature of the light source can be detected and in each case can also be used as the temperature value for the other unit or source. Thus, for example, it may also be provided that the temperature of the light source can be detected, that it can also be laid down as the instantaneous temperature of the detector unit. Ins ⁇ particular, if this detector unit and the light ⁇ source are arranged relatively adjacent to each other. Analogously, this can also be carried out with a detected temperature of the detector unit.
  • a temperature sensor for detecting the temperature of the light source is arranged and thermally coupled to the light ⁇ source.
  • the temperature sensor can also be arranged relatively far apart from the light source in a realization in which the light source is arranged on a carrier. If the carrier is formed from a material which is very highly thermally conductive, in particular a metallic carrier, such as an aluminum carrier, a very precise temperature detection can be made possible even with a very remote arrangement of the light source and the temperature sensor.
  • This temperature information of the temperature sensor can be used in particular then also for the temperature of the detector unit, when the detector unit and the light source are arranged on a common thermally leit ⁇ capable bearer.
  • a temperature sensor for detecting the temperature of the detector unit is arranged and is thermally coupled to the detector unit.
  • the temperature sensor may be glued to the detector unit, for example.
  • the temperature information of the detector unit as a basis set current temperature of the light source is taken into account with respect to, especially if the light source and the detector ⁇ unit are arranged on a common thermally conductive substrate.
  • a first temperature sensor for detecting the temperature of the light source is arranged and thermally coupled to this light source
  • a second temperature sensor for detecting the temperature of the detector unit is arranged and is thermally coupled to the detector unit.
  • the light source and / or the detector unit arranged on ei ⁇ NEM carrier or the corresponding temperature sensors of the carrier can be arranged at various positions.
  • the temperature sensor may, for example, at the edge of the carrier or on the upper surface on which the light source and / or the detector unit are ordered at ⁇ , or else be positioned on an opposite underside of the carrier.
  • the temperature of the light source and / or the temperature of the detector unit can be determined by evaluating a temperature-dependent electrical parameter of the light source.
  • the electrical parameter is preferably an operating voltage that can be detected depending on the operation of the light source or a forward voltage of the light source.
  • the light source is a Lichtemittie ⁇ rendes semiconductor device can lung by a Flusspo- and an operating condition thereby generated are determined, a forward voltage. Due based lie ⁇ gender dependencies and difference values of the current temperature, the light source can be determined with an appropriate evaluation methods.
  • the temperature of the light source and / or the temperature of the detector unit can be determined by evaluating a temperature-dependent electrical parameter of the detector unit.
  • Insbeson ⁇ then particular when the detector unit preferably is designed as a photodiode, can also here again a Be ⁇ drive are generated in the flow direction and of which the electric flux voltage are determined as a function of an impressed electric current or an embossing current in the photodiode dependent.
  • a temperature of the detector unit and in particular of the photodiode are determined.
  • At least two Differing embossing currents are impressed successively into the direction in flow ⁇ operated photodiode and dependent forward voltages are determined and of the at least two determined forward voltages, the temperature of the photodiode is dependent determined.
  • the photometric characteristic of the light source may be the light color of the light source and / or the color locus of the light source and / or the efficiency of the light source. These preferably considered photometric parameters are exemplary and their mention is not to be construed restrictive. The general indication of a photometric parameter is understood in principle to mean all parameters which can be detected photometrically.
  • the light source can also be designed as a light-emitting semiconductor component as a light-emitting semiconductor component.
  • an exporting ⁇ can tion as a high pressure lamp or fluorescent lamp or be provided as an electroluminescent lamp.
  • the at least one light source is preferably designed to generate white light.
  • the illumination system has a plurality of light sources, for example at least three light sources, where ⁇ a first light source for generating red light, a second light source for generating blue light and a third light source for generating green light is formed.
  • a plurality of light sources can also be combined to form a light source module.
  • Such a light source module may also comprise a plurality of light sources.
  • a light source for generating red light in addition to a light source for generating red light, a light source for generating green light and a light source for generating blue light at least ei ⁇ ne further light source is provided, which is example, as ⁇ also designed to generate green light. It can also be provided that in addition to the three light sources for generating green, blue and red light, a further light source for generating yellow light and / or a cyan light source is arranged. This For ⁇ composition in number and also with respect to the in each case to be generated light color of the illumination system can be designed depending on the situation with regard to the use and arrangement.
  • the illumination system may also include a plurality of such light source modules.
  • each light source is assigned its own detector unit.
  • each light source or each detector unit is arranged on a separate carrier, in particular a thermally conductive carrier. It can also be provided that the plurality of light sources and / or optionally also a multiple number of detector units are all positioned on a common thermally conductive support.
  • the illumination system with a plurality of light sources and / or a plurality of detector units, it may be provided that only a single temperature sensor is provided. Likewise, however, can also be provided that a combination of light source and detector unit having an associated Tempe ⁇ ratursensor and each of these combinations is formed with a temperature sensor.
  • a plurality of light sources these can be operated by the control and regulating circuit so that a detector unit is detected in an embodiment of the illumination system with le ⁇ diglich from which the light sources and hence which wavelengths of the received light signals are detected in the detector unit.
  • the plurality of light sources can be operated accordingly to carry out such a detection or evaluation.
  • these units Detektorein ⁇ can in principle be designed in such a way that it is designed only for the corresponding spectral region of the light emitted by this light source associated with light signals.
  • the regulation of the photometric characteristic of all light sources is feasible depending on the temperature information of a light source and / or a detector unit.
  • a relatively low-effort control can be achieved, in which a minimal amount of information to be collected is required.
  • the regulation of the photometric characteristic of a light source is performed separately from the regulation of the photometric characteristic of the other light sources depending on the temperature information of this light source and / or the detector unit and the detected light signals of this light source.
  • temperature information of each light source and / or each associated detector unit and the detected light signals of this light source are thus preferably carried out and, in particular, a regulation of the photometric parameter is carried out independently of the other light sources and / or other detector units.
  • wel ⁇ surface has at least one temperature-dependent characteristic can photometric, this photometric parameter to be changed by means of a control and regulating circuit of the illumination system.
  • Light signals of the light source ⁇ be construed ER by means of at least one detector unit and a temperature of the detector unit and / or a temperature of the light source can be determined.
  • the temperature-dependent photometric parameter of the Light source regulated.
  • Advantageous embodiments of the lighting system are to be regarded as advantageous embodiments of aimsgemä ⁇ SEN procedure.
  • FIG. 1 shows a simplified representation of one embodiment of a lighting system according ⁇ Invention.
  • FIG. 1 shows a lighting system 1 which has a control and / or regulating circuit 2.
  • the illumination system 1 comprises a first module 3, a second module 4 and a third module 5.
  • the first module 3 comprises a light source 31 which is formed in the exporting ⁇ approximately example for generating red light.
  • the module 3 comprises a detector unit 32, which is designed as a photodiode.
  • the Detektorein ⁇ standardized 32 may be formed, however, for example, as a camera or a CCD sensor.
  • the light source 31 and the detector unit 32 are arranged on a common support 33, which is designed as an aluminum plate in the exemplary embodiment.
  • a temperature sensor 34 is attached to a lateral edge of the carrier 33.
  • the temperature sensor 34 is spaced apart from the light source 31 and ⁇ positioned to the detector unit 32nd Trains t is forthcoming this temperature sensor 34 is spaced relatively far from the light source 31 and the Detektorein ⁇ standardized 32. It is only essential that the temperature sensor 34 has a sufficiently good thermal coupling to the light source 31 and the detector unit 32.
  • the light source 31 and the detector unit 32 are arranged at a distance from one another but nevertheless positioned relatively close to one another.
  • the light source 31 and the detector unit 32 are positioned on a same surface of the carrier 33.
  • Both the arrangement of the temperature sensor 34 and the positioning of the light source 31 and the detector unit 32 is merely exemplary.
  • the light source 31 and the detector unit 32 are electrically connected in the exemplary embodiment in each case via separate electrical connections to the control and / or regulating circuit 2.
  • the light source 31 is arranged such that emitted light signals 31a are emitted in the direction of a display surface 6 and can pass through them.
  • the detector unit 32 is arranged such that reflectors ⁇ oriented light signals 31b can be detected.
  • the detector ⁇ unit 32 is in particular for the detection of Hel ⁇ ltechnik of light emitted from the light source 31 light formed.
  • the lighting system 1 comprises the module 4, which is constructed analogously to the module 3.
  • the module 4 comprises a light source 41, which is formed in the rougesbei ⁇ game for generating green light.
  • DAR points beyond the module 4 is also a Detektorein ⁇ standardized at 42, this detector unit 42 and the light source 41 are arranged on a common thermally conductive substrate 43rd
  • a temperature sensor 44 is attached to the carrier 43 and coupled via this carrier 43 with the light source 41 and the detector unit 42 ther ⁇ mix.
  • the carrier 43 is also designed here as an aluminum plate.
  • the light source 41 is oriented such that by it tes emittier ⁇ light or emitted light signals are emitted in the direction of the display 6 and ⁇ 41a pass through this way. A portion of this emitted light signals 41a is reflected, said reflected Lichtsig ⁇ dimensional 41b of the detector unit 42 are detected. Since ⁇ can be detected by the brightness of the particular source of the light 41 emitted light.
  • the ⁇ ses module 4 and in particular the light source 41 and the detector unit 42 are connected to the control and / or regulating ⁇ circuit 2 electrically connected.
  • the illumination system 1 comprises third parties th module 5, which also comprises a light source 51 on ⁇ formed to produce blue light.
  • the module 5 is a Detektorein ⁇ standardized 52 which at a distance from the light source 51 on a common carrier 53, which in turn niumplatte as aluminum is formed, are arranged.
  • a temperature ⁇ tursensor 54 is secured to the carrier 53 and by this carrier 53 thermally coupled to the light source 51 and the detector unit 52.
  • the light source 51 is arranged to emit light signals 51a in the direction of the display 6. Reflected light signals 51b are detected by the detector unit 52.
  • white light can be generated by the light sources 31, 41 and 51.
  • the light sources 31, 41 and 51 have a numberb ⁇ dependent photometric characteristic quantity which approximately, for example in the execution is the color locus. To control this Far ⁇ Borts the light sources 31, 41 and 51 by means of the control and / or regulating circuit 2 can be adjusted.
  • the light sources 31, 41 and 51 and the detector units 32, 42 and 52 In operation of the illumination system 1, the light sources 31, 41 and 51 and the detector units 32, 42 and 52. Due to heat än this temperature influence ⁇ changed the color location and a color location shift occurs. To be able to avoid or compensate for this, the instantaneous temperature of the carrier 33 is detected by means of the temperature sensor 34. This temperature of the carrier 33 ensures in the exemplary embodiment a sufficiently ge ⁇ accurate statement about the temperature of the light source 31 and the detector unit 32. Thus, a single Tempe ⁇ temperature, namely the temperature of the carrier 33 detected by the temperature sensor 34 and this as instantaneous Temperature for the light source 31 as well as for the detector unit 32 is based.
  • This temperature Informa ⁇ tion is transmitted by a respective signal connection from the temperature sensor 34 to the control and / or regulating circuit.
  • the control and / or regulating circuit 2 is preferably designed as a microprocessor, which, for example, also memory units and evaluation unit th.
  • the detector unit 32 transmits information about the detected light signals 31b to the control and / or regulating circuit 2. Depending on this temperature information and the information of the detected light signals 31b and a comparison of this information with reference values, the color locus of the Light source 31 by the control and / or regulating circuit. 2
  • such a control is effected of the color point for the light source 41 and the light ⁇ source 51.
  • the carrier detected by the temperature sensors 44 and 54, 43 and 53 respectively Temperaturinformatio ⁇ NEN, and as instantaneous temperatures of the light source 41 and the detector unit 42 and the light source 51 and the detector unit 52 is based.
  • a color locus drift which possibly occurs due to the effect of temperature can thereby be compensated with little effort and nevertheless very quickly and precisely.
  • Each of the modules 3 to 5 may also have a plurality of light sources. If such a module 3 to 5 comprises a plurality of light sources, these can also be designed to generate respectively different light colors.
  • the module 3 next to the light source 31 also a further light source aufwei ⁇ sen, which is formed for example to produce green or blue light.
  • all light sources 31, 41 and 51 as well as all detector units 32, 42 and 52 are arranged on a single common carrier. If these are then arranged relatively close to one another, it can be provided that only a single temperature sensor is provided for the entire arrangement.
  • FIG. 1 it can be provided in the illustration shown in FIG. 1 that, although the light sources 31, 41 and 51 shown are formed, only a single detector unit is arranged. This single detector ⁇ unit can then be positioned such that the reflected light signals 31b, 41b and 51b can detektie- ren.
  • the temperature information is obtained without an arrangement of the temperature sensors 34, 44 and 54.
  • a temperature determination can be made possible based on temperature-dependent electrical parameters of the light sources 31, 41, 51 and / or temperature-dependent electrical parameters of the detector units 32, 42 and 52.
  • a forward voltage of the light source 31 are determined and on the basis in the control and / or regulating circuit 2 and stored calculation method to determine the temperature of the light source 31 based on this forward voltage.
  • Such a temperature determination can also at the detector unit 32 are performed when this is formed for example as a photodiode and poled in the flow direction. By impressing an embossing stream and measuring the forward voltage, it is again possible to determine the temperature on the basis of these electrical parameter values in the control and / or regulating circuit 2. In an analogous manner, this is also possible for the other light sources and other detector units.
  • the light sources 31, 41 and 51 and the detector units 32, 42 and 52 are each arranged on separate carriers.
  • an immediate temperature detection of these components can be made possible.
  • the temperature of these components is measured directly and does not take place via the carriers 33, 43 and 53.
  • the temperature sensors 34, 44 and 54 may be approved ⁇ det, for example, as NTC resistors or as PTC resistors.

Abstract

L'invention concerne un système d'éclairage avec au moins une source de lumière (31, 41, 51), dont au moins une caractéristique photométrique dépend de la température, un circuit de commande et/ou de réglage (2), qui est conçu pour le réglage de la caractéristique photométrique de la source de lumière (31, 41, 51), et au moins une unité de détection (32, 42, 52) qui sert au calcul de signaux lumineux de la source de lumière (31, 41, 51), la température de l'unité de détection (32, 42, 52) et/ou de la source de lumière (31, 41, 51) pouvant être calculée et le réglage de la caractéristique photométrique de la source de lumière (31, 41, 51) pouvant être réalisé en fonction des informations de température et des informations des signaux lumineux. L'invention concerne également un procédé de commande d'un système d'éclairage.
PCT/EP2007/052044 2006-03-09 2007-03-05 Système d'éclairage et procédé de commande d'un système d'éclairage WO2007101834A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006010999.6 2006-03-09
DE102006010999A DE102006010999A1 (de) 2006-03-09 2006-03-09 Beleuchtungssystem und Verfahren zum Betreiben eines Beleuchtungssystems

Publications (1)

Publication Number Publication Date
WO2007101834A1 true WO2007101834A1 (fr) 2007-09-13

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Application Number Title Priority Date Filing Date
PCT/EP2007/052044 WO2007101834A1 (fr) 2006-03-09 2007-03-05 Système d'éclairage et procédé de commande d'un système d'éclairage

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DE (1) DE102006010999A1 (fr)
TW (1) TW200742489A (fr)
WO (1) WO2007101834A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007059130A1 (de) 2007-12-07 2009-06-10 Osram Gesellschaft mit beschränkter Haftung Verfahren und Anordnung zur Einstellung eines Farborts sowie Leuchtsystem
WO2009102192A1 (fr) * 2008-02-15 2009-08-20 Eldolab Holding B.V. Système d’éclairage comprenant une source de lumière et une unité de commande et un système de commande de l’éclairage servant à commander une source de lumière au moyen de surfaces d’interfaces utilisateur multiples

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411046B1 (en) * 2000-12-27 2002-06-25 Koninklijke Philips Electronics, N. V. Effective modeling of CIE xy coordinates for a plurality of LEDs for white LED light control
US20030133491A1 (en) * 2002-01-04 2003-07-17 Kelvin Shih LED junction temperature tester
US20030230991A1 (en) * 2002-06-17 2003-12-18 Koninklijke Philips Electronics N.V. LED-based white-light backlighting for electronic displays
US20040079866A1 (en) * 2002-08-05 2004-04-29 Naoki Nishiyama Optical receiver and a method for manufacturing the same
WO2004086822A1 (fr) * 2003-03-25 2004-10-07 sitronic Ges. für elektrotechnische Ausrüstung mbH & Co. KG Module d'eclairage de vehicule automobile
US20040262491A1 (en) * 2003-06-30 2004-12-30 Posamentier Joshua D. Illuminated and non-illuminated photodiodes for monitoring and controlling AC and DC components of a laser beam

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411046B1 (en) * 2000-12-27 2002-06-25 Koninklijke Philips Electronics, N. V. Effective modeling of CIE xy coordinates for a plurality of LEDs for white LED light control
US20030133491A1 (en) * 2002-01-04 2003-07-17 Kelvin Shih LED junction temperature tester
US20030230991A1 (en) * 2002-06-17 2003-12-18 Koninklijke Philips Electronics N.V. LED-based white-light backlighting for electronic displays
US20040079866A1 (en) * 2002-08-05 2004-04-29 Naoki Nishiyama Optical receiver and a method for manufacturing the same
WO2004086822A1 (fr) * 2003-03-25 2004-10-07 sitronic Ges. für elektrotechnische Ausrüstung mbH & Co. KG Module d'eclairage de vehicule automobile
US20040262491A1 (en) * 2003-06-30 2004-12-30 Posamentier Joshua D. Illuminated and non-illuminated photodiodes for monitoring and controlling AC and DC components of a laser beam

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DE102006010999A1 (de) 2007-09-13
TW200742489A (en) 2007-11-01

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