Luminous device using a high-resolution light source

Patent metadata

Field	Value
Publication number	US-10764548-B2
Application number	US-201716333937-A
Country	US
Kind code	B2
Filing date	Jul 26, 2017
Priority date	Sep 15, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A luminous device for a motor vehicle, said device including a pixelized light source and an optical system that is arranged to project a pixelized light beam emitted by the pixelized light source, the optical system comprising a first mirror arranged to collect and reflect rays of the pixelized light beam emitted by the pixelized light source, a second mirror arranged to reflect the rays reflected by the first mirror, and a third mirror arranged to receive the rays reflected by the second mirror and to reflect these received rays so as to correct field aberrations. The invention enables improved projection of a pixelized light beam by a luminous motor-vehicle device.

First claim

The invention claimed is:

1. A luminous land-vehicle device for illuminating a scene, comprising:
a monolithic electroluminescent source comprising electroluminescent elements;
an optical system arranged to form an image of the monolithic electroluminescent source; and
an electronic device configured to
receive at least one first measurement regarding at least one physical parameter of a vehicle, the luminous land-vehicle device being integrated with the vehicle,
receive at least one second measurement regarding at least one physical parameter of the scene, and
control illumination of the electroluminescent elements of the monolithic electroluminescent source depending on the received at least one first measurement and the received at least one second measurement,
wherein a refresh frequency of the at least one first measurement is higher than a refresh frequency of the at least one second measurement.

2. The luminous land-vehicle device according to claim 1 , wherein the electronic device comprises at least one of a power converter and an integrated circuit.

3. The luminous land-vehicle device according to claim 2 , wherein the electronic device receives the at least one first measurement and the at least one second measurement asynchronously.

4. The luminous land-vehicle device according to claim 2 , wherein the refresh frequency of the at least one first measurement is at least three times higher than the refresh frequency of the at least one second measurement.

5. The luminous land-vehicle device according to claim 2 , further comprising at least one first sensor that generates the at least one first measurement.

6. The luminous land-vehicle device according to claim 2 , further comprising at least one second sensor that generates the at least one second measurement.

7. The luminous land-vehicle device according to claim 2 , further comprising a heatsink arranged on at least the monolithic electroluminescent source.

8. The luminous land-vehicle device according to claim 1 , wherein the refresh frequency of the at least one first measurement is at least three times higher than the refresh frequency of the at least one second measurement.

9. The luminous land-vehicle device according to claim 1 , further comprising at least one first sensor that generates the at least one first measurement.

10. The luminous land-vehicle device according to claim 1 , further comprising at least one second sensor that generates the at least one second measurement.

11. The luminous land-vehicle device according to claim 10 , wherein the at least one second sensor is a camera that produces an image stream.

12. The luminous land-vehicle device according to claim 11 , wherein the at least one second sensor comprises processing circuitry configured to analyze the image stream produced by the camera.

13. The luminous land-vehicle device according to claim 12 , wherein the analysis of the image stream includes segmenting operations on images of the image stream.

14. The luminous land-vehicle device according to claim 1 , further comprising a heatsink arranged on at least the monolithic electroluminescent source.

15. The luminous land-vehicle device according to claim 1 , wherein the optical system has a resolution that is lower than or equal to 0.25 degrees and a field larger than or equal to 5 degrees.

16. A method for illuminating a scene with a luminous land-vehicle device, comprising:
receiving, by an electronic device, a first measurement of at least one physical parameter of a vehicle, the luminous land-vehicle device being integrated with the vehicle;
determining, by the electronic device and based on the received first measurement, which electroluminescent elements of a monolithic electroluminescent source must be turned on; and
configuring, by the electronic device, at least the determined electroluminescent elements of the monolithic electroluminescent source so that they emit light.

17. The method according to claim 16 , further comprising:
receiving, by the electronic device, a second measurement of at least one physical parameter of the scene,
determining, by the electronic device and based on the received second measurement, which electroluminescent elements of the monolithic electroluminescent source must be turned on, and
configuring, by the electronic device, at least the determined electroluminescent elements of the monolithic electroluminescent source so that they emit light.

18. The method according to claim 16 , further comprising:
receiving, by the electronic device, a second measurement and a third measurement of at least two physical parameters of the scene,
fusing, by the electronic device, the received second measurement and the received third measurement,
receiving, by the electronic device, a new first measurement of the at least one physical parameter of the vehicle,
determining, by the electronic device and based on the received second measurement, the received third measurement, and the received new first measurement, which electroluminescent elements of the monolithic electroluminescent source must be turned on, and
configuring, by the electronic device, at least the determined electroluminescent elements of the monolithic electroluminescent source so that they emit light.

19. The method according to claim 16 , wherein, provided that a second measurement of at least one physical parameter of the scene is not received,
the receiving, by the electronic device, the first measurement of the at least one physical parameter of the vehicle,
the determining, by the electronic device and based on the received first measurement, which electroluminescent elements of the monolithic electroluminescent source must be turned on, and
the configuring, by the electronic device, at least the determined electroluminescent elements of the monolithic electroluminescent source so that they emit light
are repeated.

Assignees

• Valeo Vision

Inventors

• Thin Guillaume
• De Lamberterie Antoine
• Mbata Samira
• Canonne Thomas
• Hoang Van Thai
• Dubois Vincent
• Amiel Francois-Xavier
• Lefaudeux Nicolas

Classifications

• H10H20/825

  containing nitrogen, e.g. GaN · CPC title

• H10H20/0137

  the light-emitting regions comprising nitride materials · CPC title

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10H20/821

  of the light-emitting regions, e.g. non-planar junctions · CPC title

• H05B44/00

  Circuit arrangements for operating electroluminescent light sources (for operating light emitting diodes H05B45/00) · CPC title