Optical inserts and waveguide fixtures comprising the same

Patent metadata

Field	Value
Publication number	US-10281641-B2
Application number	US-201615347413-A
Country	US
Kind code	B2
Filing date	Nov 9, 2016
Priority date	Nov 9, 2016
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

In one aspect, lighting devices are described herein. A lighting device comprises an optic housing, a waveguide optic and an optical insert positioned in the housing, the optical insert comprising one or more reflective sidewalls for redirecting light emitted from the waveguide optic. The waveguide optic comprises sidewalls and a light extraction face including extraction elements, wherein the reflective sidewalls of the optical insert cover at least a portion of the sidewalls of the waveguide optic.

First claim

The invention claimed is:

1. A lighting device comprising:
an optic housing;
a waveguide optic; and

an optical insert positioned in the housing between the waveguide optic and optic housing, the optical insert comprising one or more reflective sidewalls for redirecting light emitted from the waveguide optic.

2. The lighting device of claim 1 , wherein the waveguide optic comprises sidewalls and a light extraction face, wherein the reflective sidewalls of the optical insert cover at least a portion of the sidewalls of the waveguide optic.

3. The lighting device of claim 2 , wherein the one or more reflective sidewalls of the optical insert form a continuous border enclosing the sidewalls of the waveguide optic.

4. The lighting device of claim 2 further comprising a light source adjacent to a sidewall of the waveguide optic.

5. The lighting device of claim 4 , wherein the light source comprises a plurality of light emitting diodes.

6. The lighting device of claim 4 , wherein the optical insert comprises an aperture for interfacing the waveguide optic with the light source.

7. The lighting device of claim 6 , wherein the optical insert further comprises reflective sleeves adjacent to the aperture, the sleeves covering a light coupling region of the waveguide optic.

8. The lighting device of claim 7 , wherein the reflective sleeves form an aperture entrance geometry matching geometry of the waveguide optic.

9. The lighting device of claim 7 , wherein the reflective sleeves comprise a specularly reflective surface.

10. The lighting device of claim 1 , wherein the optical insert is a singular piece.

11. The lighting device of claim 1 , wherein the reflective sidewalls are provided in multiple pieces.

12. The lighting device of claim 1 , wherein the reflective sidewalls of the optical insert redirect light emitted from sidewalls of the waveguide optic to provide peak emission from the lighting device at angles greater than 60 degrees relative to nadir.

13. The lighting device of claim 2 , wherein the optical insert further comprises a reflective base wall.

14. The lighting device of claim 13 , wherein the one or more reflective sidewalls and reflective base wall define a reflective compartment in which the waveguide optic is positioned.

15. The lighting device of claim 13 , wherein the one or more reflective sidewalls form an angle with the reflective base wall of 85 degrees to 95 degrees.

16. The lighting device of claim 13 , wherein the one or more reflective sidewalls are normal to the base wall.

17. The lighting device of claim 1 , wherein the reflective sidewalls are terraced.

18. The lighting device of claim 1 , wherein the one or more reflective sidewalls comprise a specularly reflective surface.

19. The lighting device of claim 13 , wherein the one or more reflective sidewalls and base wall are formed of reflective sheets.

20. The lighting device of claim 13 , wherein the one or more reflective sidewalls and base walls are formed of plastic comprising metallized surfaces.

21. An optical insert of an optic assembly, the optical insert comprising two or more reflective sidewalls for redirecting light emitted from a waveguide optic housed by the assembly, the waveguide optic comprising sidewalls and a light extraction face.

22. The optical insert of claim 21 , wherein the reflective sidewalls are arranged to cover at least a portion of the waveguide optic sidewalls.

23. The optical insert of claim 21 , wherein the reflective sidewalls form a continuous border for at least partially enclosing sidewalls of the waveguide optic.

24. The optical insert of claim 21 further comprising a sidewall aperture for interfacing a waveguide optic sidewall with a light source.

25. The optical insert of claim 24 , wherein the light source comprises a plurality of light emitting diodes.

26. The optical insert of claim 24 further comprising reflective sleeves adjacent to the aperture, the sleeves having dimensions to cover a light coupling region of the waveguide optic.

27. The optical insert of claim 26 , wherein the reflective sleeves form an aperture entrance geometry matching geometry of the waveguide optic.

28. The optical insert of claim 26 , wherein the reflective sleeves are continuous with the sidewall aperture.

29. The optical insert of claim 26 , wherein the reflective sleeves are detachable from the sidewall aperture.

30. The optical insert of claim 21 , wherein the optical insert is a singular piece.

31. The optical insert of claim 21 , wherein the reflective sidewalls are provided in multiple pieces.

32. The optical insert of claim 22 , wherein the reflective sidewalls are configured to redirect light emitted from sidewalls of the waveguide optic to provide peak emission from the waveguide optic at angles greater than 60 degrees relative to nadir.

33. The optical insert of claim 21 further comprising a reflective base wall.

34. The optical insert of claim 33 , wherein the one or more reflective sidewalls and reflective base wall define a reflective compartment for receiving the waveguide optic.

35. The optical insert of claim 33 , wherein the one or more reflective sidewalls form an angle with the base wall of 85 degrees to 95 degrees.

36. The optical insert of claim 33 , wherein the one or more reflective sidewalls are normal to the reflective base wall.

37. The optical insert of claim 21 , wherein the reflective sidewalls are terraced.

38. The optical insert of claim 21 , wherein the one or more reflective sidewalls comprise a specularly reflective surface.

39. A lighting device comprising:
an optic housing;
a light source positioned in the optic housing;
a waveguide optic; and
an optical insert positioned in the housing, the optical insert comprising one or more reflective sidewalls for redirecting light emitted from the waveguide optic.

Assignees

• Cree Inc

Inventors

• Lim Jin Hong
• Goldstein Corey
• Wilcox Kurt
• Dixon Mark
• Fisher Scott

Classifications

• G02B6/0068

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title

• G02B6/0031

  Reflecting element, sheet or layer · CPC title

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title

• G02B6/0088

  of the light guide or other optical sheets in the package · CPC title