Vehicle lighting device with presentation of driving assistance information

Patent metadata

Field	Value
Publication number	US-10336242-B2
Application number	US-201715441959-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Feb 26, 2016
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

A lighting device of a vehicle includes at least one lighting device for a road scene in front of the vehicle arranged to form a first light beam defined by a first lighting. A device for generating a second light beam defined by a second lighting is configured to superimpose the second beam on the first light beam. A sum of the first lighting and of the second lighting is greater than the first lighting, the second light beam forms driving assistance information.

First claim

The invention claimed is:

1. A lighting device of a vehicle comprising:
at least one lighting means for a road scene in front of the vehicle, arranged to form a first light beam defined by a first lighting, and
a device for generating a second light beam defined by a second lighting configured to superimpose the second beam on the first light beam, in which a sum of the first lighting and of the second lighting is greater than the first lighting and in which the second light beam forms driving assistance information,
wherein the second lighting of the second light beam is greater than the first lighting of the first light beam, and
wherein a contrast between the first and the second light beams lies between zero exclusive and five, the contrast being calculated according to the following equation:
(LMAX−LMIN)/LMIN,

LMAX being a luminance resulting from a sum of the first light beam and the second light beam, and
LMIN being a luminance of the first light beam.

2. The lighting device according to claim 1 , wherein the lighting of the first beam in a portion of the road scene lying between three meters and fifteen meters in front of the vehicle lies between 20 lux and 50 lux.

3. The lighting device according to claim 1 , wherein the lighting of the first beam is equal to 30 lux.

4. The lighting device according to claim 1 , wherein the lighting means is arranged with the lighting of the first beam to be constant in a portion of the road scene lying between three meters and fifteen meters in front of the vehicle.

5. The lighting device according to claim 1 , wherein the lighting of the second beam in a portion of the road scene lying between three meters and fifteen meters in front of the vehicle lies between 30 lux and 150 lux.

6. The lighting device according to claim 1 , wherein the lighting means and the device for generating the second beam share at least one same light source which generates the first light beam and the second light beam.

7. The lighting device according to claim 6 , wherein the light source is pixelated.

8. The lighting device according to claim 7 , wherein the light intensity of a plurality of light sources can be controlled individually.

9. The lighting device according to claim 7 , in which the light source is formed by a matrix of individual light sources which extend in a same plane (π).

10. The lighting device according to claim 9 , wherein the lighting means comprises at least one optical system whose focal plane coincides with the plane (π) in which the individual light sources extend.

11. The lighting device according to claim 1 , wherein the lighting means and the device for generating the second beam are formed by at least one same assembly comprising at least one light source emitting a beam of light rays, a scanning system receiving the beam of light rays and distributing it over a surface of a wavelength conversion device.

12. The lighting device according to claim 1 , wherein the lighting means and the device for generating the second beam are formed by at least one same assembly comprising a uniform light source and an LCD screen.

13. The lighting device according to claim 1 , wherein the lighting means and the device of the second beam are formed by at least one same assembly comprising a uniform light source and micro-mirrors.

14. The lighting device according to claim 1 , wherein the second light beam is configured to be superimposed on the first light beam in at least a part of the first light beam, this part corresponding to an area of the road scene.

15. A headlight of a motor vehicle comprising:
the lighting device according to claim 1 .

16. The lighting device according to claim 1 , wherein an intensity of the first light beam is 400 Cd and an intensity of the second light beam is between 8000 and 9600 Cd.

Assignees

• Valeo Vision

Inventors

• Canonne Thomas
• De Lamberterie Antoine
• Thin Guillaume
• Mbata Samira
• Lesaffre Olivier-Sebastien

Classifications

• B60Q2300/45

  Special conditions, e.g. pedestrians, road signs or potential dangers · CPC title

• F21S41/645

  by electro-optic means, e.g. liquid crystal or electrochromic devices · CPC title

• B60Q1/085

  due to special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers (B60Q1/10, B60Q1/12, B60Q1/1423 take precedence) · CPC title

• B60Q1/0076

  Switches therefor (B60Q1/1446, B60Q1/343, B60Q1/40 take precedence) · CPC title

• F21W2102/00

  Exterior vehicle lighting devices for illuminating purposes · CPC title