IP Library › Granted Patent US 7,321,193
Granted Patent B2
US 7,321,193 · App. 11/345,795 · Granted Jan 22, 2008

Device structure for OLED light device having multi element light extraction and luminescence conversion layer

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Quick Facts
Patent No.
US 7,321,193
App. No.
11/345,795
Granted
Jan 22, 2008
Kind
B2
Abstract

An apparatus such as a light source has a multi-element light extraction and luminescence conversion layer disposed over a transparent layer of the light source and on the exterior of said light source. The multi-element light extraction and luminescence conversion layer includes a plurality of light extraction elements and a plurality of luminescence conversion elements. The light extraction elements diffuses the light from the light source while luminescence conversion elements absorbs a first spectrum of light from said light source and emits a second spectrum of light.

Claims (44)

1. An electroluminescent apparatus, comprising:

a light source comprising a transparent layer capable of at least partially transmitting light out from said light source; and

a multi-element light extraction and luminescence conversion layer disposed over said transparent layer and on the exterior of said light source, said multi-element light extraction and luminescence conversion layer comprising a plurality of light extraction elements and a plurality of luminescence conversion elements, wherein:

said light extraction elements diffuse said light from said light sources,

said luminescence conversion elements absorb a first spectrum of light from said light source and emit a second spectrum of light, the second spectrum of light being different from the first spectrum of light, and

said light extraction elements and luminescence conversion elements are laterally adjacent to one another and directly adjacent to said transparent layer so that each of the light extraction elements and luminescence conversion elements contacts the transparent layer.

2. The apparatus of claim 1 wherein said light extraction elements have a refractive index matching the refractive index of the transparent layer.

3. The apparatus of claim 1 wherein said luminescence conversion elements comprise at least one color changing material.

4. The apparatus of claim 3 wherein said color changing material is a fluorescent or phosphorescent dye.

5. The apparatus of claim 1 wherein said light extraction elements have a refractive index greater than the refractive index of the luminescence conversion elements.

6. The apparatus of claim 3 wherein said color changing material is in a transparent matrix material.

7. The apparatus of claim 6 wherein said transparent matrix material is at least one of silicone, epoxy, polymethylmethacrylate or polycarbonate.

8. The apparatus of claim 1 wherein said multi-element layer is attached physically and/or chemically to said transparent layer.

9. The apparatus of claim 1 wherein said light extraction elements have a trapezoidal geometry.

10. The apparatus of claim 1 wherein said device is part of a light source application.

11. The apparatus of claim 1 wherein said light source is an OLED device.

12. The apparatus of claim 1 wherein said transparent layer is an electrode or an encapsulation layer and transmits light out of said apparatus.

13. The apparatus of claim 12 wherein said light extraction elements have a refractive index matching the refractive index of the transparent layer.

14. The apparatus of claim 12 wherein said luminescence conversion elements comprises at least one color changing material.

15. The apparatus of claim 14 wherein said color changing material is a fluorescent or phosphorescent dye.

16. The apparatus of claim 14 wherein said color changing material is in a transparent matrix material.

17. The apparatus of claim 16 wherein said transparent matrix material is at least one of silicone, epoxy, polymethylmethacrylate or polycarbonate.

18. The apparatus of claim 12 wherein said light extraction elements have a refractive index greater than the refractive index of the luminescence conversion elements.

19. The apparatus of claim 12 wherein said multi-element layer is attached physically and/or chemically to said transparent layer.

20. The apparatus of claim 12 wherein said light extraction elements have a trapezoidal geometry.

21. The apparatus of claim 12 wherein said device is part of a light source application.

22. The apparatus of claim 12 wherein said light source is an OLED device.

23. The apparatus of claim 12 wherein said light extraction elements comprise a non-absorbing, light transmissive material.

24. The apparatus of claim 12 wherein said luminescence conversion elements comprise at least one of an organic fluorescent dye, perylene, coumarin, fluorescent conjugated polymer, organic phosphorescent dye, conjugated phosphorescent polymer, inorganic color changing material, cerium doped garnet, nitride phosphor, ionic phosphor, or quantum dot.

25. The apparatus of claim 12 wherein said luminescence conversion elements have a lens-like or flat geometry.

26. The apparatus of claim 12 wherein said luminescence conversion elements and said light extraction elements comprise materials with a low absorption coefficient.

27. The apparatus of claim 12 wherein said plurality of light extraction elements and plurality of luminescence conversion elements are arranged in an alternating pattern.

28. The apparatus of claim 12 wherein said plurality of light extraction elements and a plurality of luminescence conversion elements are arranged in a striped pattern.

29. The apparatus of claim 12 wherein said plurality of light extraction elements and a plurality of luminescence conversion elements are arranged in a mesh pattern.

30. The apparatus of claim 12 wherein said plurality of light extraction elements and plurality of luminescence conversion elements are arranged such that said plurality of luminescence conversion elements are conically sectioned.

31. The apparatus of claim 1 wherein said transparent layer is a substrate.

32. The apparatus of claim 1 wherein said light extraction elements comprise a non-absorbing, light transmissive material.

33. The apparatus of claim 1 wherein said luminescence conversion elements comprise at least one of an organic fluorescent dye, perylene, coumarin, fluorescent conjugated polymer, organic phosphorescent dye, conjugated phosphorescent polymer, inorganic color changing material, cerium doped garnet, nitride phosphor, ionic phosphor, or quantum dot.

34. The apparatus of claim 1 wherein said luminescence conversion elements have a lens-like or flat geometry.

35. The apparatus of claim 1 wherein said luminescence conversion elements and said light extraction elements comprise a material with a low absorption coefficient.

36. The apparatus of claim 1 wherein said plurality of light extraction elements and plurality of luminescence conversion elements are arranged in an alternating pattern.

37. The apparatus of claim 1 wherein said plurality of light extraction elements and plurality of luminescence conversion elements are arranged in a striped pattern.

38. The apparatus of claim 1 wherein said plurality of light extraction elements and a plurality of luminescence conversion elements are arranged in a mesh pattern.

39. The apparatus of claim 1 wherein said plurality of light extraction elements and a plurality of luminescence conversion elements are arranged such that said plurality of luminescence conversion elements are conically-sectioned.

Assignments (2)
MERGER Recorded Feb 17, 2026
From: OSRAM OLED GMBH
To: AMS-OSRAM INTERNATIONAL GMBH
Reel/Frame 074881/0104 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 2, 2015
From: OSRAM OPTO SEMICONDUCTORS GMBH
To: OSRAM OLED GMBH
Reel/Frame 036527/0179 →