EP2052584A1 - Schaltung für ein kraftfahrzeug, insbesondere zur ansteuerung einer beleuchtungseinrichtung - Google Patents
Schaltung für ein kraftfahrzeug, insbesondere zur ansteuerung einer beleuchtungseinrichtungInfo
- Publication number
- EP2052584A1 EP2052584A1 EP07801552A EP07801552A EP2052584A1 EP 2052584 A1 EP2052584 A1 EP 2052584A1 EP 07801552 A EP07801552 A EP 07801552A EP 07801552 A EP07801552 A EP 07801552A EP 2052584 A1 EP2052584 A1 EP 2052584A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light source
- circuit
- light
- light sources
- voltage
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 230000008859 change Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
- H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
-
- 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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
Definitions
- Circuit for a motor vehicle in particular for controlling a
- the present invention relates to a circuit for a motor vehicle, in particular for driving a lighting device, the circuit having a first light source and a second light source connected in parallel, wherein the first light source, a first current sink and the second light source is associated with a second current sink and the circuit a measuring means is assigned.
- German Patent Application DE 101 15 388 A1 discloses a drive circuit for an LED array, wherein the drive circuit comprises at least one first LED strand and at least one second LED strand, wherein a switch is arranged serially to each LED strand and Each LED string has a supply terminal, wherein a control circuit is designed so that it controls the first switch of the first LED string so that a constant average of the current flowing through the first LED string is achieved, wherein the control circuit for controlling also the switch of the further LED strands is designed.
- the drive circuit further comprises a total current detection device, with which the sum of the currents can be determined by at least two LED strands.
- a disadvantage of this is that a distinction between a so-called master LED strand and other LED strands takes place, so that in a malfunction of the so-called master LED strand failure of the circuit takes place, which adversely affects the reliability of the circuit.
- Object of the present invention is to provide a drive circuit for a motor vehicle, in particular for controlling a lighting device, with failures of the lighting or the light source or other error conditions are detected and a flexible response to such errors. Furthermore, the thermal power loss should be minimized.
- a circuit for a motor vehicle in particular for driving a lighting device, wherein the circuit connected in parallel has a first light source and a second light source, wherein the the first light source, a first current sink and the second light source is associated with a second current sink, wherein the circuit is associated with a measuring means and wherein the measuring means is provided for determining the operability of the first light source and for determining the operability of the second light source.
- the circuit it is further preferred for the circuit to have a first switch associated with the first light source and a second switch assigned to the second light source, the control unit being associated with a control means which is switchable as a function of the functionality of the first light source and depending on the operability of the second light source of the second switch is switchable.
- this also a cost reduction is achieved by the fact that by reducing the thermal power loss, a higher permissible ambient temperature of the circuit is possible, so that less expensive components with lower requirements according to the invention in the circuit can be used or that the durability or the life of the circuit components and in particular also the components of the light sources (in particular light emitting diodes) is increased.
- the circuit has a regulator provided for the first light source and the second light source, in particular a current regulator or a voltage regulator.
- a regulator provided for the first light source and the second light source, in particular a current regulator or a voltage regulator.
- the controller is further preferred for the controller to be controllable as a function of the operability of the first light source and the second light source.
- the regulator it is further preferred for the regulator to be controllable after a change in the functionality of the first light source or the second light source with a time delay of less than or equal to one second, preferably of less than or equal to 500 ms, more preferably of less than or equal to 300 ms , most preferably less than or equal to 100 ms.
- the first light source has a first light-emitting diode, preferably a plurality of first light-emitting diodes, and / or that the second light source has a second light-emitting diode, preferably a plurality of second light-emitting diodes.
- first light-emitting diode preferably a plurality of first light-emitting diodes
- second light source has a second light-emitting diode, preferably a plurality of second light-emitting diodes.
- the circuit can be operated in a clocked manner at a sufficient repetition rate, in particular with a duty cycle of switch-on time interval to switch-off time interval of less than or equal to 1 to 100, preferably less than or equal to 1 to 200, particularly preferably less than or equal to 1 to 500, most preferably from less than or equal to 1 to 1000.
- a duty cycle of switch-on time interval to switch-off time interval of less than or equal to 1 to 100, preferably less than or equal to 1 to 200, particularly preferably less than or equal to 1 to 500, most preferably from less than or equal to 1 to 1000.
- Figure 1 shows a schematic representation of a first embodiment of the circuit according to the invention.
- FIG. 2 shows schematically the first embodiment of the circuit according to the invention with more details.
- FIG. 3 shows schematically a second embodiment of the circuit according to the invention.
- FIG. 4 schematically shows a third embodiment of the circuit according to the invention.
- FIG. 5 schematically shows a time diagram for illustrating various switching states at important points in the third embodiment of the circuit according to the invention.
- FIG. 1 schematically shows a circuit 10 according to the invention, wherein the circuit 10 is provided in particular for controlling a lighting device.
- the circuit 10 has, for example, a first light source 11 and a second light source 12.
- the light sources 11, 12 are provided in particular as so-called chains of light emitting diodes, the first light source having a first light emitting diode 11 ' or preferably a plurality of first light emitting diodes 11 ' and wherein the second light source 12 is a second light emitting diode 12 ' and preferably a plurality of second light emitting diodes 12 ' has.
- the light sources 11, 12 are respectively connected to or associated with a current sink (alternatively a current source), wherein the first light source 11 is associated with a first current sink 21 and the second light source 12 is associated with a second current sink 22.
- a current sink alternatively a current source
- MOS-FET transistor metal oxide semiconductor field effect transistor
- the circuit 10 has a regulator 60, which regulates the voltage level (or current level) which is applied to the parallel-connected light sources 11, 12.
- a connection to a measuring means 40 is provided, which ensures the functionality of the first light source 11 or the second light source 12 is able to check. According to the invention, this check either takes place permanently (ie simultaneously for both the first light source 11 and the second light source 12) or sequentially (ie the light sources 11, 12 are switched on one after the other and the respective result is fed to the measuring means 40).
- the measuring means 40 is further connected to a control means 50 or combined with this or provided integrated, wherein by means of the control means 50 influence on the behavior of the circuit 10 is taken such that in case of failure, for example, the first light source 11 and the corresponding first Current sink 21 and thus the entire circuit branch of the first light source 11 (hereinafter also referred to as light-emitting diode strand or LED strand) is turned off.
- the control means 50 influence on the behavior of the circuit 10 is taken such that in case of failure, for example, the first light source 11 and the corresponding first Current sink 21 and thus the entire circuit branch of the first light source 11 (hereinafter also referred to as light-emitting diode strand or LED strand) is turned off.
- the measuring means 40 by means of the measuring means 40 also it can be determined whether, for example, one of the first light-emitting diodes 11 ' or one of the second light-emitting diodes 12 ' is alloyed (ie low-resistance) and thus no longer produces a voltage drop, which leads to a greater power loss while the supply voltage remains constant at the corresponding LED strand, the invention should be kept as low as possible. If the power loss in the current sink becomes too high due to the alloy of LEDs, this can be selectively switched off.
- the regulator 60 comprises, in particular, a current regulator or a voltage regulator, wherein a first regulating component 61, for example in the form of an integrated circuit, can be used as an example of a current regulator, and the regulator 60 furthermore comprises a second regulating component 62, for example in the form of a so-called DC / DC Transducer parts, may have.
- a first regulating component 61 for example in the form of an integrated circuit
- the regulator 60 furthermore comprises a second regulating component 62, for example in the form of a so-called DC / DC Transducer parts
- each light source 11, 12 comprises one of the light-emitting diode branches, which are regulated via the current sinks 21, 22 to as accurately as possible exactly the same current intensity.
- the current sinks 21, 22 may also be designed as current sources.
- the currents flowing through the light sources 11, 12 are respectively added via a so-called sense resistor 41 (for example of a size of 470 m ⁇ ) by an adder 50 ' .
- the information about the functionality of the first and second light sources 11, 12 is supplied to the measuring means 40 via corresponding measuring lines 42.
- the measuring means 40 and the control means 50 is now able to control the adder 50 ' (with a subordinate voltage gain control 50 ") such that an output 51 of the adder 50' or the voltage gain control 50" bears a voltage level which corresponds to a control connection (Feedback terminal, hereinafter also denoted by reference numeral 51) of the first control device 61 is supplied, so that the voltage regulation at the input 65 of the light sources 11, 12 on the changed situation (for example, failure of one of the LED strands) adequately, ie with the concern of sufficient voltage levels can be reacted.
- a control connection hereinafter also denoted by reference numeral 51
- the controller 60 is to regulate the current flowing on the line 65 to a total of 300 mA. If only one of the LED branches is operated, then the controller 60 should deliver only 150 mA. For this, in the first embodiment of the circuit 10 according to the invention, the switchable voltage gain control 50 "is required.
- the control of the circuit 10 initially reacts such that the voltage level at the input 65 of the light sources 11, 12 to the maximum set threshold voltage of the first control device 61st is up-regulated, (because at the feedback input 51 of the first control device 61 is applied too low a voltage).
- the current in the still functioning of the LED branches or light sources 11, 12 is still kept constant at 15 mA, which is due to the function of the constant current sinks 21, 22. Therefore, the remaining voltage drop must ultimately be intercepted via the functioning of the current sinks 21, 22, so that currently a very large power loss occurs. This condition must be prevented with the shortest possible delay time.
- the measuring means 40 recognizes via the measuring lines 42 that one of the LED strands or one of the light sources 11, 12 has failed and the corresponding LED branch is switched off. Then the voltage at the output of the voltage gain control 50 " raised again to the level in the adjusted state, so that the controller 60 and the first control device 61 can back to the normal voltage level at the input 65 of the light sources 11, 12 back. It is thus ensured by the circuit 10 according to the invention that there are no unstable states. Thus, there is no flash or otherwise a user disturbing impairment of the function of the light source. Precisely because the defective light source is selectively switched off, it is impossible for the light source to work temporarily and then again temporarily.
- the brightness of the illumination device (which according to the invention is a backlight device for a display device) merely decreases by a defined value and then again remains stable, which is exactly the desired behavior of such an arrangement and, if appropriate is not perceived by a user, such as when the failure of the light sources 11, 12 happens in daylight and due to the ambient illumination of the decline in the backlight is not noticeable.
- the brightness in areas can be readjusted to the desired value of two or more light sources.
- FIG. 2 shows a schematic representation of the circuit according to the invention according to the first embodiment in the case of two light sources 11, 12 in greater detail.
- the first light source 11, the second light source 12, the first light emitting diode 11 ' , the second light emitting diode 12 ' , the first current sink 21, the second current sink 22, the regulator 60 with the first control device 61 and the second control device 62, the input 65 of the light sources 11, 12 as well as the control input 51 and the adder 50 'with voltage gain control 50 "Furthermore, the measuring means 40 and the control means 50 are also shown in the left part of Figure 2.
- a first switch 31 and a second switch 32 are also shown, the switches 31, 32 being provided for the controlled switching off of individual light-emitting diode branches or individual light sources 11, 12. This is effected by corresponding control lines (not individually provided with a reference numeral) via the control means 50 performed.
- corresponding control lines not individually provided with a reference numeral
- FIG. 3 shows a schematic representation of a second embodiment of the circuit 10 according to the invention.
- each of the light sources 11 to 15 according to the second embodiment of the inventive circuit 10 has a current sink, but only the first current sink 21 is shown in FIG. The same applies to the switch, d. H.
- the switch, d. H In FIG. 3, only the first switch 31 for the first light source 11 is shown.
- the control of the light sources 11, 12 takes place in the second embodiment of the invention via the controller 60 and corresponding current sinks 21 analogous to the first embodiment of the invention.
- controller 60 with the first control device 61 and the second control device 62, the input 65 of the light sources 11 to 15, the control input 51 and the adder 50 'is shown. Furthermore, the measuring means 40 and the control means 50 in the left part of Figure 3 is also shown.
- the functions of the voltage gain control 50 "(according to the first embodiment of the invention) are also taken over by the control means 50.
- the control means 50 has an output line 52 which is connected to the Adder 50 ' acts, so that at the output 51 of the adder 50 ' the voltage necessary for the stabilization of the control circuit is applied even in the event of failure of individual light emitting diode chains or light sources which, for the sake of simplicity, only one measuring line 42 is shown) detected that the LED branch has failed.
- the control means 50 subsequently controls the input 52 of the adder 50 'in such a way (in particular by means of a digital / analog converter or by means of a so-called PPG (programmable pulse generator)) that the voltage at the output 51 of the adder remains at the level which is necessary for a regulated voltage at the input 65 of the light sources.
- PPG programmable pulse generator
- FIG. 4 schematically shows a third embodiment of the circuit 10.
- the first light source 11, the second light source 12, the first current sink 21, the second current sink 22, the first control device 61, the second control device 62, the first switch 31 and the second switch 32 and the measuring means 40 and the control means 50 are shown .
- there is no adder 50 ' for providing the voltage level necessary at the feedback input 51 of the first control device 61 but it is connected between the first current sink 21 by means of a first diode D1, in particular a Schottky diode and the feedback input 51 ensures that when the voltage level on the cathode side of the first diode D1 due to a failure of the first light source 11 largely decreases towards the ground potential, a corresponding reaction (due to a turn on of the diode D1) at the feedback input 51 (drop of the applied voltage ) takes place in such a way that in turn the input voltage at the input 65 of the light sources 11, 12 is up-regulated.
- the through-connection of the first diode D1 is then reversed again.
- a second diode D2 in particular a Schottky diode, between the second current sink 22 and the feedback input 51 that when the voltage level on the cathode side of the second diode D2 due to a failure of the second light source 12 drops as far as possible to the ground potential, a corresponding reaction (due to a Switching through the second diode D2) at the feedback input 51 (drop of voltage applied there) takes place in such a way that in turn the input voltage at the input 65 of the light sources 11, 12 is up-regulated.
- the provision of the information as to whether or not one of the light sources 11, 12 has failed is directed to the measuring means 40 via a common measuring line 43 (or measuring connection 43 ') for all the light sources 11, 12. It must therefore be done sequentially scanning the various light-emitting branches. About the switch 31, 32 of the failed LED branch is turned off.
- a third diode D ' also, for example, a Schottky diode
- a fourth diode D " likewise, for example, a Schottky diode
- a further measuring connection 42 ' is used to measure the voltage drop over the entire light-emitting diode chain for a specific light source 11, 12.
- control line S1 is the periodic switching on and off of the circuit 10 with activated lighting device (such as backlighting of a display device) and with a duty cycle of Einschaltzeitintervall to Ausschaltzeitintervall depending on the required brightness of the light sources.
- the control line S2 serves to switch the first light source 11 on or off.
- the control line S3 serves to switch the second light source 12 on or off.
- the control line S4 serves to separate the feedback input 51 from the ground potential.
- the control unit S5 is used to sample the voltage regulation (or current regulation) at the input 65 of the light sources and the measuring line 42 or the measuring connection 42 '.
- FIG. 5 schematically shows a time diagram of various states of the control lines S1, S2, S3, S4 and S5 of the control means 50.
- the circuit 10 is operated clocked according to the invention. This means that at a clock output (control line S1), which turns the entire circuit on and off at regular intervals on and off.
- control line S1 When two light sources 11 and 12 are functioning, the same switching action is also performed on the individual switching lines (control lines S2 and S3) for the individual light sources.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006037342A DE102006037342B4 (de) | 2006-08-08 | 2006-08-08 | Schaltung für ein Kraftfahrzeug, insbesondere zur Ansteuerung einer Beleuchtungseinrichtung |
| PCT/EP2007/007010 WO2008017467A1 (de) | 2006-08-08 | 2007-08-08 | Schaltung für ein kraftfahrzeug, insbesondere zur ansteuerung einer beleuchtungseinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2052584A1 true EP2052584A1 (de) | 2009-04-29 |
| EP2052584B1 EP2052584B1 (de) | 2014-03-12 |
Family
ID=38606435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07801552.6A Not-in-force EP2052584B1 (de) | 2006-08-08 | 2007-08-08 | Schaltung für ein kraftfahrzeug, insbesondere zur ansteuerung einer beleuchtungseinrichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8143808B2 (de) |
| EP (1) | EP2052584B1 (de) |
| DE (1) | DE102006037342B4 (de) |
| ES (1) | ES2471977T3 (de) |
| WO (1) | WO2008017467A1 (de) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008021534B4 (de) | 2008-04-30 | 2024-12-19 | Automotive Lighting Reutlingen Gmbh | Beleuchtungseinrichtung für ein Kraftfahrzeug und Verfahren zum Betreiben einer Beleuchtungseinrichtung für ein Kraftfahrzeug |
| DE102008030365A1 (de) * | 2008-06-26 | 2009-08-20 | Continental Automotive Gmbh | Einrichtung zur Ansteuerung von in einem Array angeordneten Einzellichtquellen |
| KR101531838B1 (ko) * | 2008-07-04 | 2015-06-26 | 오스람 게엠베하 | 적어도 하나의 제1 led 및 하나의 제2 led를 동작시키기 위한 회로 구성 및 방법 |
| ITBS20080235A1 (it) * | 2008-12-22 | 2010-06-23 | St Microelectronics Srl | Circuito elettronico di alimentazione |
| RU2524477C2 (ru) * | 2009-03-12 | 2014-07-27 | Конинклейке Филипс Электроникс Н.В. | Сид устройство освещения с характеристикой цветовой температуры лампы накаливания |
| DE102009054140B4 (de) | 2009-11-20 | 2025-02-27 | Bayerische Motoren Werke Aktiengesellschaft | Versorgungsregelschaltung und Systemanordnung, insbesondere in Fahrzeugen |
| CN102771185B (zh) * | 2010-03-01 | 2016-07-13 | 黑拉许克联合股份有限公司 | 为led阵列供电的方法及执行该方法的电路布置 |
| CN201680231U (zh) * | 2010-03-17 | 2010-12-22 | Bcd半导体制造有限公司 | 一种lcd的led背光驱动装置 |
| US9420653B2 (en) * | 2010-11-19 | 2016-08-16 | Semiconductor Components Industries, Llc | LED driver circuit and method |
| JP5739747B2 (ja) * | 2011-06-27 | 2015-06-24 | 株式会社小糸製作所 | 半導体光源点灯回路 |
| US8749164B2 (en) * | 2011-09-23 | 2014-06-10 | Paragon Semiconductor Lighting Technology Co., Ltd. | Illuminating apparatus capable of detecting power supply and method using the same |
| JP6009205B2 (ja) * | 2012-04-20 | 2016-10-19 | 株式会社小糸製作所 | 半導体光源点灯回路 |
| US9226373B2 (en) | 2013-10-30 | 2015-12-29 | John Joseph King | Programmable light timer and a method of implementing a programmable light timer |
| DE102015214939A1 (de) * | 2015-08-05 | 2017-02-09 | Osram Gmbh | Spannungsabhängige Verschaltung einzelner Lichtquellen |
| AT518685B1 (de) * | 2016-06-07 | 2018-05-15 | Zkw Group Gmbh | Kraftfahrzeug-Beleuchtungseinrichtung |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1006506A1 (de) * | 1998-12-03 | 2000-06-07 | Hewlett-Packard Company | Optische Anzeige für ein Fahrzeug |
| DE19945546B4 (de) * | 1999-09-23 | 2005-06-23 | Reitter & Schefenacker Gmbh & Co. Kg | Verfahren zur Ansteuerung von Leuchtmitteln von Fahrzeugen, vorzugsweise von Kraftfahrzeugen, sowie Vorrichtung zur Durchführung des Verfahrens |
| US6362578B1 (en) * | 1999-12-23 | 2002-03-26 | Stmicroelectronics, Inc. | LED driver circuit and method |
| DE10115388A1 (de) * | 2001-03-28 | 2002-10-10 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Ansteuerschaltung für ein LED-Array |
| JP4177022B2 (ja) * | 2002-05-07 | 2008-11-05 | ローム株式会社 | 発光素子駆動装置、及び発光素子を備えた電子機器 |
| US6690146B2 (en) * | 2002-06-20 | 2004-02-10 | Fairchild Semiconductor Corporation | High efficiency LED driver |
| JP4236894B2 (ja) * | 2002-10-08 | 2009-03-11 | 株式会社小糸製作所 | 点灯回路 |
| JP4342262B2 (ja) * | 2003-10-03 | 2009-10-14 | アルエイド株式会社 | Led点灯制御装置、led点灯制御方法 |
| JP2005306217A (ja) * | 2004-04-21 | 2005-11-04 | Koito Mfg Co Ltd | 車両用灯具 |
| WO2006012633A1 (en) * | 2004-07-23 | 2006-02-02 | Magna International Inc. | Power supply system and method for automative led lighting systems |
| US20060033482A1 (en) * | 2004-08-06 | 2006-02-16 | Stmicroelectronics S.A. | Supply of several loads by A D.C./D.C. converter |
| JP4400880B2 (ja) * | 2004-10-05 | 2010-01-20 | 株式会社小糸製作所 | 車両用灯具の点灯制御回路 |
| TWI236169B (en) * | 2004-11-19 | 2005-07-11 | Quanta Comp Inc | Driving device for light emitted diode |
| JP4398411B2 (ja) * | 2005-07-12 | 2010-01-13 | 株式会社小糸製作所 | 車両用灯具の点灯制御装置 |
| DE102006005521B3 (de) * | 2006-02-07 | 2007-05-16 | Lear Corp | Schaltung und Verfahren zum Ansteuern eines LED-Array's |
-
2006
- 2006-08-08 DE DE102006037342A patent/DE102006037342B4/de not_active Expired - Fee Related
-
2007
- 2007-08-08 WO PCT/EP2007/007010 patent/WO2008017467A1/de not_active Ceased
- 2007-08-08 EP EP07801552.6A patent/EP2052584B1/de not_active Not-in-force
- 2007-08-08 ES ES07801552.6T patent/ES2471977T3/es active Active
-
2009
- 2009-02-06 US US12/367,209 patent/US8143808B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008017467A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090184663A1 (en) | 2009-07-23 |
| EP2052584B1 (de) | 2014-03-12 |
| WO2008017467A1 (de) | 2008-02-14 |
| DE102006037342B4 (de) | 2013-07-18 |
| DE102006037342A1 (de) | 2008-02-21 |
| ES2471977T3 (es) | 2014-06-27 |
| US8143808B2 (en) | 2012-03-27 |
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