Lighting module for a motor vehicle comprising a modulated intensity coherent light source

A lighting module, motor vehicle technology, applied in the direction of motor vehicles, light sources, electric light sources, etc., can solve the problems of false alarms or omissions of safety systems, unreliable external ambient light, etc., to increase safety, reduce electromagnetic radiation, and reduce danger. Effect

Active Publication Date: 2021-10-26
VALEO VISION SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, prior art devices of this kind are unreliable with respect to external ambient light, which may be incident on the filter and / or sensor but generated by incoherent sources and diffusers
This shortcoming can cause security systems to generate false positives or false negatives

Method used

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  • Lighting module for a motor vehicle comprising a modulated intensity coherent light source
  • Lighting module for a motor vehicle comprising a modulated intensity coherent light source
  • Lighting module for a motor vehicle comprising a modulated intensity coherent light source

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Embodiment Construction

[0046] In the following description, like reference numerals will be used to describe like concepts via different embodiments of the invention. Thus, the numerals 100, 200 identify lighting modules in two different embodiments of the invention.

[0047] Unless stated otherwise, technical features specifically described for a given embodiment may be combined with technical features described in the context of other embodiments by way of non-limiting example.

[0048] figure 1A diagrammatic representation of a lighting module 100 according to an embodiment of the invention is shown. The light source 110 is adapted to emit coherent light in a main emission direction 112 . The light source 110 is, for example, a semiconductor source such as a laser diode. Modulation means 120 modulates the intensity of the light emitted by the source. The modulating signal may be sinusoidal or eg alternate between at least two consecutive values. The control device 150 is functionally connect...

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Abstract

The invention proposes a lighting module for a motor vehicle comprising a modulated intensity coherent light source. The features of the invention make it possible to increase the safety of devices of this kind by using a more reliable fault detection than the prior art. A method for controlling a device of this kind is also proposed.

Description

technical field [0001] The invention relates to the field of lighting devices, in particular for motor vehicles. The invention relates to a lighting device comprising a coherent light source. Background technique [0002] Motor vehicles are equipped with headlights, also referred to as headlights, which are used to illuminate the road ahead of the vehicle at night or in reduced brightness. It is known to use light sources adapted to emit coherent light in headlights for motor vehicles. This means, for example, semiconductor elements such as laser diodes. As is known, in devices of this kind, a light source using semiconductor elements is supplied with power through a DC / DC converter. A converter of this kind is suitable for converting a first current provided by, for example, a battery of a motor vehicle into a second current different from the first current and for supplying semiconductor elements with electric power. [0003] Illumination systems using laser diodes gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S41/141H05B33/08H05B45/33F21Y115/10H05B44/00F21W107/10
CPCF21S41/141F21W2102/00H05B45/14F21S41/16F21S45/10F21S41/40F21S41/176H05B45/375H05B47/165F21S41/30F21V23/003F21V23/0464F21Y2115/30F21S43/10B60Q1/0076F21V25/00H01S5/062
Inventor 希巴斯丁·克里克
Owner VALEO VISION SA
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