Lighting arrangement, light guide arrangement and method

Patent metadata

Field	Value
Publication number	US-12189280-B2
Application number	US-202017612834-A
Country	US
Kind code	B2
Filing date	Mar 26, 2020
Priority date	May 23, 2019
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

The invention relates to an illumination arrangement comprising a light-emitting optoelectronic element and an optical device for beam conversion of electromagnetic radiation generated by the light-emitting optoelectronic element. The light emitting optoelectronic element comprises a plurality of emission areas arranged in matrix form; and each emission region is associated with a main beam direction. At least a portion of the emission areas is arranged such that the centers of the emission areas lie on a curved surface.

First claim

The invention claimed is:

1. An illumination arrangement comprising:
a light-emitting optoelectronic arrangement;
an optical device for beam conversion of electromagnetic radiation generated by the light-emitting optoelectronic arrangement, the optical device including two spherical lenses arranged linearly along a beam path of the electromagnetic radiation;
wherein the light emitting optoelectronic arrangement comprises a plurality of emission areas arranged in matrix form;
wherein each emission area is associated with a main beam direction;
wherein each emission area comprises a plurality of LEDs each configured to emit a different color; and
wherein at least a part of the emission areas is arranged so that the centers of the emission areas lie on a curved surface.

2. The illumination arrangement according to claim 1 , wherein the curved surface has a concave curvature.

3. The illumination arrangement according to claim 1 , wherein the main beam directions of the emission areas are at an angle to one another.

4. The illumination arrangement according to claim 1 , wherein emission areas with a coinciding main beam direction are present which are arranged on different planes with a different distance in the main beam direction to the optical device.

5. The illumination arrangement according to claim 1 ,
wherein the curved surface forms a spherical segment, an associated spherical center being located on the optical axis of the optical device; or
wherein the curved surface is in the form of at least one portion of a rotated conical section including an ellipsoid, paraboloid or hyperboloid.

6. The illumination arrangement according to claim 1 , wherein the emission areas, the centers of which are arranged on the curved surface, each form Lambert radiators.

7. The illumination arrangement according to claim 1 , wherein at least one of the emission areas is the aperture of a primary optical element associated with an LED or of a converter element associated with an LED.

8. The illumination arrangement according to claim 1 , wherein the emission areas whose centers lie on a curved surface are part of a monolithic pixelated optochip.

9. The illumination arrangement according to claim 8 , wherein the monolithic pixelated optochip comprises a plurality of LEDs arranged in rows and columns.

10. The illumination arrangement according to claim 1 , wherein the emission areas form the surface of an outcoupling structure.

11. The illumination arrangement according to claim 1 , wherein the emission areas, the centers of which lie on a curved surface, are associated with separate LEDs arranged on a non-planar IC substrate.

12. The illumination arrangement according to claim 1 , wherein the optical device comprises a system optics and between the system optics and the emission areas there is a curved collimating optical element or a plurality of non-planar collimating optical elements.

13. The illumination arrangement according to claim 1 , wherein the optical device comprises system optics forming imaging projection optics.

14. The illumination arrangement according to claim 1 , wherein the light-emitting optoelectronic arrangement comprises a layer which comprises a plurality of drive elements including current sources for individually driving each of the emission areas.

15. A method of manufacturing an illumination arrangement, comprising:
providing a light-emitting optoelectronic device;
providing an optical device for beam conversion of an electromagnetic radiation generated by the light-emitting optoelectronic element, the optical device including two spherical lenses arranged linearly along a beam path of the electromagnetic radiation;
wherein the optoelectronic element comprises a plurality of emission areas arranged in matrix form; and
wherein at least a part of the emission areas is arranged so that the centers of the emission areas lie on a curved surface.

16. The method according to claim 15 , wherein separate LEDs are arranged on a non-planar IC substrate to create the emission areas.

17. The method according to claim 15 , wherein at least one of the emission areas is formed by the aperture of a primary optic associated with an LED or of a converter element associated with an LED.

18. A light guide arrangement, comprising:
a display device;
projection optics;
wherein the display device comprises a matrix of pixels for emitting visible light;
wherein each pixel comprises a plurality of LEDs having spectrally different light emission;
wherein each pixel comprises associated therewith a separate collimating optics upstream of the projection optics; and
wherein the collimation optics are designed so that enlarged and mutually superimposed intermediate images of the LEDs of the respective pixel are generated in a beam path in front of the projection optics.

19. The light guide arrangement according to claim 18 , wherein the intermediate images of the LEDs of the respective pixel generated by the collimation optics overlap each other over at least 70%, 80% or 90% of their intermediate image area.

20. The light guide arrangement according to claim 18 , wherein the intermediate images are LEDs virtual intermediate images.

21. The light guide arrangement according to claim 18 , wherein the collimating optics are arranged between the LEDs of a pixel and the projection optics.

22. The light guide arrangement according to claim 18 , wherein the LEDs of a pixel occupy no more than 50%, more preferably no more than 35% and most preferably no more than 20% of the pixel area.

23. The light guide arrangement according to claim 18 , wherein the LEDs are formed as color-converted LEDs or as VCSELs or as edge-emitting laser diodes and comprise illuminated optical waveguide end pieces.

24. The light guide arrangement according to claim 18 , wherein the collimating optics is configured so that the total area of the overlapping intermediate images of the LEDs of the respective pixel corresponds to at least 70%, 80% or 90% of the pixel area.

25. The light guide arrangement according to claim 18 , wherein the collimating optics comprises a holographic optical element (HOE) and/or refractive optical element (ROE) and/or a diffractive optical element (DOE).

26. The light guide arrangement according to claim 18 , wherein the radiation emitted by the projection optics is directed indirectly or directly onto a display.

27. The light guide arrangement according to claim 18 , wherein each pixel comprises an LED arrangement.

28. The light guide arrangement according to claim 18 , wherein a plurality of pixels of the matrix each comprise a lens disposed over the LEDs.

29. The light guide arrangement according to claim 18 , wherein the at least some pixels of the matrix comprise a redundant LED.

30. The light guide arrangement according to claim 18 , wherein the light guide arrangement is configured to generate an image on a video wall or a head-up display.

Assignees

• Osram Opto Semiconductors Gmbh

Inventors

• Brick Peter
• Singer Frank

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H29/142

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

• G02B27/30

  Collimators · CPC title

• G02B27/0103

  comprising holographic elements · CPC title