EP1286567A2 - Dispositif d' éclairage - Google Patents

Dispositif d' éclairage Download PDF

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Publication number
EP1286567A2
EP1286567A2 EP02015416A EP02015416A EP1286567A2 EP 1286567 A2 EP1286567 A2 EP 1286567A2 EP 02015416 A EP02015416 A EP 02015416A EP 02015416 A EP02015416 A EP 02015416A EP 1286567 A2 EP1286567 A2 EP 1286567A2
Authority
EP
European Patent Office
Prior art keywords
led
lighting device
converter
electrical system
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
Application number
EP02015416A
Other languages
German (de)
English (en)
Other versions
EP1286567B1 (fr
EP1286567A3 (fr
Inventor
Detlef Niggemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP1286567A2 publication Critical patent/EP1286567A2/fr
Publication of EP1286567A3 publication Critical patent/EP1286567A3/fr
Application granted granted Critical
Publication of EP1286567B1 publication Critical patent/EP1286567B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits

Definitions

  • the present invention relates to a Lighting device for a motor vehicle, comprising at least one connectable to a vehicle electrical system Control device, connectable to the LED assemblies and are operable.
  • an LED lighting device for to provide a motor vehicle which is a has improved functionality in terms of use a plurality of LED assemblies on the electrical system of a Motor vehicle.
  • a reliable operation be achieved with the least possible effort. This is especially against the background of the importance of the LED assemblies mounted on the motor vehicle in areas are particularly at risk from damage in the event of accidents are.
  • control device as Light control module is formed with a DC-DC converter for the implementation of the vehicle electrical system voltage in a constant LED operating voltage for controlling the LED arrays.
  • a particular advantage of the invention is that the Structure of a lighting device on a motor vehicle with a plurality of LED arrangements, for example for Rear and brake lights, turn signals and other indicator lights, considerably simplified.
  • Light control module by means of the contained therein DC-DC converter especially for the LED arrangements a stabilized operating voltage regardless of the possibly fluctuating vehicle electrical system voltage available may be required in the prior art regulated constant current sources for each individual LED arrangement omitted, whereby according to the component and Production cost is reduced.
  • a constant Operating voltage is applied, can within the provided Load limits any number of LED arrangements operated without additional stabilization measures of the operating current are required.
  • Another advantage of the invention is that the Operating voltage at the output of the DC-DC converter relatively accurate to the operating voltages of the LED arrays used can be adjusted. Compliance with the permissible LED operating currents can therefore already by means of be achieved relatively small series resistors. This will the total power dissipation is minimized and accordingly the Increased efficiency of the lighting device.
  • a particularly advantageous embodiment of the invention provides that the deliverable from the DC-DC converter operating voltage is higher than the vehicle electrical system voltage.
  • the DC / DC converter for example, at an on-board voltage U B of 12 V, an output voltage of constant 15 V.
  • This circuit has the particular advantage that when a short circuit of the LED array against the vehicle electrical system voltage occurs, for example, due to a defect in DC-DC converter or in the control element, the light-emitting diodes are not destroyed.
  • the DC-DC converter is designed as a switching converter.
  • Such DC / DC converters have high efficiency and can be reasonably inexpensive with adequate performance data to provide.
  • a Switching converter with little effort one opposite to Available onboard voltage increased LED operating voltage be generated.
  • the light control module a Linear voltage regulator includes. If no additional DC converter is present, but this can only one LED operating voltage are delivered, which is lower than the vehicle electrical system voltage. Especially for High-voltage on-board electrical systems is the DC voltage conversion by means of a linear voltage regulator an advantageous Alternative.
  • the light control module can continue to a Current measuring device for measuring the output currents of the Be integrated DC-DC converter.
  • the current measurement can, for example, by shunt resistors and this made parallel connected voltmeters.
  • anyone can connect to the DC-DC converter connected LED array such Be assigned to current measuring device. This makes it possible the actual function of each LED arrangement too monitor and in case of deviations from a given Operating current, for example, to cause an indication that a malfunction has occurred.
  • the light control module at the output of DC converter switching elements can be arranged. These can be, for example, as electrically controllable Semiconductor switch may be formed.
  • the Switch By pressing the Switch, for example via an upstream electronic control device, the individual can Light functions, such as brake light, tail light, Rear fog lights, turn signals or other lighting functions in Operation.
  • Semiconductor switches have the special advantage of being durable and practical are maintenance free.
  • the switching elements can be of a measuring and Monitoring device be controlled. In this way can be ensured that the LED assemblies are not be turned on when of the measuring and Monitoring device has been registered a malfunction is.
  • the lighting device according to the invention is special advantageous with regard to the control of a plurality of LED devices, for example in a vehicle as Brake light, taillight, combined tail light, Rear fog light, turn signal or for other lighting functions.
  • Each of these LED arrays may consist of one or more several serially and / or parallel connected LED with be realized at least one resistor. Of the Series resistor is connected to the number and throughput voltage of the LED adapted and sized so that the permissible LED operating current is not exceeded.
  • Fig. 1 is a functional diagram of a lighting device according to the invention is shown.
  • This includes a light control module 1, which on the input side, in the circuit diagram on the left, can be connected to a vehicle electrical system with the vehicle electrical system voltage U B.
  • a light control module 1 On the output side, several LED arrangements 2, for example as brake light, tail light, combined brake tail light, rear fog light or the like of a motor vehicle, are connected to output lines 3 at this light control module 1.
  • the light control module has a DC-DC converter 4 (DC / DC converter), which converts the input-side vehicle electrical system voltage U B into a constant, applied to the output lines 3 LED operating voltage.
  • a switch 5 incorporated, which each preferably is designed as a semiconductor switch and with each of which individual of the LED assemblies 2 are put into operation can.
  • the switches 5 can be controlled by a control device 6 be controlled, which, for example, a Contains microcontroller.
  • This control device 6 detects via current sensors 7 the closed switches 5 through the output line 3 current flowing. Dodge this one measured current from a given nominal current of an LED array This is done by the controller as Malfunction rated. This malfunction may possibly stored in a fault memory and over Output lines 8 to corresponding display and Diagnostic devices are forwarded.
  • Each of the LED arrays 2 includes series circuits each a plurality of LED 9, each having a series resistor 10th upstream. Several of these series circuits are each connected in parallel. The number of each in one Series switched LED 9 and the value of the series resistors 10 depends on the type of LED used, the required Luminous intensity or the nominal operating current of the LED tuned. Depending on the intended use, within the permissible Load limits as many LEDs 9 in an LED arrangement 2 summarized.
  • the light control module 1 is a central electronic supply device for a A plurality of LED assemblies 2 are provided.
  • constant LED operating voltage can, in contrast to the known ones Constant current circuits, any number of LED arrangements be controlled simultaneously.
  • monitoring the actually flowing operating currents in the Connecting lines 3 is relatively easy one Function diagnosis of the LED arrangements possible.

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP02015416A 2001-07-31 2002-07-11 Dispositif d' éclairage Expired - Lifetime EP1286567B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10137338A DE10137338A1 (de) 2001-07-31 2001-07-31 Beleuchtungseinrichtung
DE10137338 2001-07-31

Publications (3)

Publication Number Publication Date
EP1286567A2 true EP1286567A2 (fr) 2003-02-26
EP1286567A3 EP1286567A3 (fr) 2005-05-25
EP1286567B1 EP1286567B1 (fr) 2008-01-02

Family

ID=7693754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02015416A Expired - Lifetime EP1286567B1 (fr) 2001-07-31 2002-07-11 Dispositif d' éclairage

Country Status (2)

Country Link
EP (1) EP1286567B1 (fr)
DE (2) DE10137338A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7287889B2 (en) * 2003-03-06 2007-10-30 Honda Motor Co., Ltd. Lamp apparatus for vehicle
DE102004046763A1 (de) * 2004-09-24 2006-03-30 Schmitz-Gotha Fahrzeugwerke Gmbh Fahrzeug-Leuchtenanordnung, insbesondere für Anhänger
DE102006005521B3 (de) * 2006-02-07 2007-05-16 Lear Corp Schaltung und Verfahren zum Ansteuern eines LED-Array's
DE102006013300A1 (de) * 2006-03-21 2007-09-27 Kompled Gmbh & Co. Kg Fahrzeugleuchte und Anhänger-Beleuchtungsanordnung mit solchen Fahrzeugleuchten
DE102006039182A1 (de) * 2006-08-21 2008-03-20 Siemens Ag Adaptives Kurvenlicht ohne bewegliche Teile
DE102007009104B4 (de) * 2007-02-24 2011-04-14 Lear Corporation Gmbh Steuerschaltung zum getakteten Ansteuern mindestens einer Leuchtdiode
DE102014007778A1 (de) * 2014-05-21 2015-11-26 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Verfahren und Steuergerät zur Ansteuerung einer mit lichtemittierenden Dioden ausgestatteten Fahrzeugleuchte durch Parallelschaltung
DE102017210197B4 (de) * 2017-06-19 2023-03-30 Volkswagen Aktiengesellschaft Kraftfahrzeug-Verschaltungsvorrichtung zum Verschalten eines Steuergeräts mit Fahrzeugkomponenten sowie Fahrzeugleuchte, Kraftfahrzeug und Betriebsverfahren für die Verschaltungsvorrichtung
DE102017221695A1 (de) 2017-12-01 2019-06-06 Volkswagen Aktiengesellschaft Beleuchtungsanordnung für ein Kraftfahrzeug und Kraftfahrzeug
DE102022119081A1 (de) 2022-07-29 2024-02-01 Infineon Technologies Ag Lichtsteuermodul zum ansteuern von led-modulen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4341058C1 (de) 1993-12-02 1995-04-27 Daimler Benz Ag Lichtsteuereinrichtung für ein Kraftfahrzeug
DE19734750A1 (de) 1997-08-12 1999-02-18 Reitter & Schefenacker Gmbh Heckleuchte von Kraftfahrzeugen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61263175A (ja) * 1985-05-15 1986-11-21 Mitsubishi Electric Corp 発光ダイオ−ド駆動回路
JPH05136461A (ja) * 1991-11-14 1993-06-01 Sharp Corp 光送信器のｌｅｄ駆動回路
JPH08127297A (ja) * 1994-10-31 1996-05-21 Sekisui Chem Co Ltd ブレーキランプ付バンパー
FR2745459B1 (fr) * 1996-02-28 1998-04-10 Valeo Electronique Circuit d'illumination a diodes electroluminescentes, notamment pour vehicules automobiles, feu de signalisation, et tableau de commande, l'incorporant
DE19732828C2 (de) * 1997-07-30 2001-01-18 Siemens Ag Schaltungsanordnung zur Ansteuerung eines Leuchtdioden-Arrays
FR2780599B1 (fr) * 1998-06-30 2000-09-15 Magneti Marelli France Circuit electrique d'eclairage d'un dispositif indicateur de vehicule automobile comportant des moyens de commande et d'asservissement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4341058C1 (de) 1993-12-02 1995-04-27 Daimler Benz Ag Lichtsteuereinrichtung für ein Kraftfahrzeug
DE19734750A1 (de) 1997-08-12 1999-02-18 Reitter & Schefenacker Gmbh Heckleuchte von Kraftfahrzeugen

Also Published As

Publication number Publication date
EP1286567B1 (fr) 2008-01-02
DE50211445D1 (de) 2008-02-14
EP1286567A3 (fr) 2005-05-25
DE10137338A1 (de) 2003-02-20

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