Luminous module comprising a monolithic electroluminescent source

Patent metadata

Field	Value
Publication number	US-10683986-B2
Application number	US-201716333910-A
Country	US
Kind code	B2
Filing date	Jul 26, 2017
Priority date	Sep 15, 2016
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

A luminous module, in particular for a motor vehicle, including: a monolithic electroluminescent source including electroluminescent elements; a primary optical system equipped with a plurality of convergent optics, at least one convergent optic being associated with each electroluminescent element and forming an image of the electroluminescent element with which it is associated.

First claim

The invention claimed is:

1. A luminous module for a motor vehicle, comprising:
a monolithic electroluminescent source comprising electroluminescent elements;
a primary optical system equipped with a plurality of convergent optics, each convergent optic being associated with and disposed downstream of a respective electroluminescent element and forming a virtual image of the respective electroluminescent element with which the convergent optic is associated,
wherein the virtual images are formed upstream of the electroluminescent elements and are substantially adjacent to each other, the virtual images forming a light beam with uniform distribution.

2. The luminous module according to claim 1 , wherein:
the electroluminescent elements of the monolithic source form an array of electroluminescent elements; and
the convergent optics form an array of convergent micro-lenses.

3. The luminous module according to claim 2 , wherein an optical axis of each convergent optic is aligned with a center of the respective electroluminescent element with which said convergent optic is associated.

4. The luminous module according to claim 2 , wherein a distance between each convergent optic and the respective electroluminescent element with which said convergent optic is associated is smaller than or equal to an object focal length of said convergent optic.

5. The luminous module according to claim 2 , wherein an angle of collection of the convergent optics is comprised between 30° and 70°, inclusive of limits.

6. The luminous module according to claim 2 , wherein the plurality of convergent optics of the primary optical system covers the monolithic electroluminescent source.

7. The luminous module according to claim 2 , wherein the plurality of convergent optics makes contact with the monolithic electroluminescent source.

8. The luminous module according to claim 1 , wherein an optical axis of each convergent optic is aligned with a center of the respective electroluminescent element with which said convergent optic is associated.

9. The luminous module according to claim 1 , wherein a distance between each convergent optic and the respective electroluminescent element with which said convergent optic is associated is smaller than or equal to an object focal length of said convergent optic.

10. The luminous module according to claim 1 , wherein an angle of collection of the convergent optics is comprised between 30° and 70°, inclusive of limits.

11. The luminous module according to claim 1 , wherein the plurality of convergent optics of the primary optical system covers the monolithic electroluminescent source.

12. The luminous module according to claim 1 , wherein the plurality of convergent optics makes contact with the monolithic electroluminescent source.

13. The luminous module according to claim 1 , wherein an intermediate element is arranged between the plurality of convergent optics and the monolithic electroluminescent source.

14. The luminous module according to claim 1 , wherein a distance between a center of a first pixel and a center of a second pixel neighboring the first is comprised between 20 and 500 microns.

15. The luminous module according to claim 1 , wherein dimensions of an electroluminescent element of the electroluminescent elements are comprised between 10 and 500 microns (μm).

16. The luminous module according to claim 1 , wherein each convergent optic comprises at least one convex segment.

17. The luminous module according to claim 1 , wherein the plurality of convergent optics is integrally formed from a same material.

18. The luminous module according to claim 1 , wherein the electroluminescent elements of the monolithic electroluminescent source are light-emitting diodes.

19. A luminous device comprising:
a luminous module according to claim 1 ; and
an optical projecting system forming an image of the virtual images produced by the primary optical system.

Assignees

• Valeo Vision

Inventors

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

Classifications

• F21V5/007 Primary

  Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane (combination of two or more refractors F21V5/008) · CPC title

• F21S43/26

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255 · CPC title

• F21K9/60

  Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction · CPC title

• F21S41/255

  Lenses with a front view of circular or truncated circular outline · CPC title

• F21V5/004 Primary

  using microlenses · CPC title