Electrical power supply for a lighting device of an automobile vehicle comprising a plurality of outputs

Patent metadata

Field	Value
Publication number	US-2017253173-A1
Application number	US-201715446120-A
Country	US
Kind code	A1
Filing date	Mar 1, 2017
Priority date	Mar 1, 2016
Publication date	Sep 7, 2017
Grant date	—

Abstract

A device that provides a circuit for controlling the power supply of a plurality of groups of light sources, preferably of the light-emitting diodes type, which perform a plurality of lighting functions for an automobile vehicle. The device is noteworthy in that it enables a primary output voltage and several high-voltage secondary outputs to be produced, corresponding to the power supply requirements of the various groups of light sources, with the use of a single switch-mode converter circuit.

First claim

1 . Device for controlling the electrical power supply of at least two groups of light sources for an automobile vehicle, comprising:
a switch-mode voltage converter circuit, said converter circuit comprising means designed to generate a switched voltage signal starting from an input DC voltage, and primary output means designed to convert said switched voltage signal into an output DC voltage having a first voltage level and intended to power a first group of light sources, wherein the device comprises secondary output means designed to convert said switched voltage signal into at least a second output DC voltage having a second voltage level and intended to power a second group of light sources.

2 . Device according to claim 1 , wherein the second voltage level is higher than the first voltage level.

3 . Device according to claim 1 , wherein the secondary output means comprise an electronic circuit comprising capacitors and diodes.

4 . Device according to claim 1 , wherein the secondary output means produce several output DC voltages starting from the switched voltage signal, the levels of these output voltages being higher than the first voltage level.

5 . Device according to claim 1 , wherein said switched voltage signal alternates between two different voltage values.

6 . Device according to claim 5 , wherein one of the two voltage values is zero.

7 . Device according to claim 1 , wherein the converter circuit is a switch-mode converter, notably a circuit of the SEPIC, flyback, voltage step-down or voltage step-up type.

8 . Device according to claim 1 , wherein the secondary output means comprise linear means for regulating the output electrical current.

9 . Lighting device for an automobile vehicle comprising at least two groups of light sources producing at least two different light beams, wherein the device comprises a device according to claim 1 for controlling the electrical power supply of the two groups of light sources.

10 . Lighting device according to claim 9 , wherein a first group of light sources, performing all or part of a first lighting function, is powered by the first output voltage, and in that at least a second group of light sources, performing all or part of a second lighting function, is powered by a second output voltage of the device.

11 . Lighting device according to claim 9 , wherein the lighting functions comprise the position lights and low-beam headlamps functions.

12 . Lighting device according to claim 9 , wherein the light sources comprise light-emitting diodes, power diodes, or laser diodes.

Assignees

• Valeo Vision

Inventors

• Boudikian David
• Yvon Sylvain
• Alves Jean-Philippe
• Jauregi Lrantzu
• Mazzour Souheil

Classifications

• H05B45/10

  Controlling the intensity of the light · CPC title

• H05B45/37 Primary

  Converter circuits · CPC title

• H05B45/395

  Linear regulators · CPC title

• B60Q1/48

  for parking purposes · CPC title

• B60Q2400/30

  Daytime running lights [DRL], e.g. circuits or arrangements therefor · CPC title