Optic assemblies and fixtures comprising the same

Patent metadata

Field	Value
Publication number	US-10094971-B2
Application number	US-201715625546-A
Country	US
Kind code	B2
Filing date	Jun 16, 2017
Priority date	Nov 9, 2016
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

In one aspect, optic assemblies and waveguide fixtures comprising the same are described herein. In an exemplary embodiment, an optic assembly includes an optic housing, an optical insert positioned in the optic housing, and a waveguide optic positioned in the optical insert. The waveguide optic includes a light extraction face and at least two sets of light extraction elements provided on the light extraction face. The at least two sets of light extraction elements are disposed on opposing sides of an axis of symmetry for extracting a symmetric lighting distribution.

First claim

The invention claimed is:

1. A lighting device comprising:
an optic housing;
an optical insert positioned in the optic housing; and
a waveguide optic positioned in the optical insert, the waveguide optic comprising a light extraction face and at least two sets of light extraction elements disposed over the light extraction face.

2. The lighting device of claim 1 , wherein the two sets of light extraction elements are disposed on opposing sides of an axis of symmetry.

3. The lighting device of claim 1 , wherein each set of light extraction elements comprises a plurality of non-linear extraction elements.

4. The lighting device of claim 3 , wherein the non-linear extraction elements are arcuate.

5. The lighting device of claim 1 , wherein the waveguide optic further comprises a light redirecting face opposite the light extraction face and a plurality of light redirection elements disposed over the light redirecting face.

6. The lighting device of claim 1 further comprising a first light coupling region disposed proximate a first set of light extraction elements and a second light coupling region disposed proximate a second set of light extraction elements.

7. The lighting device of claim 6 , wherein the first and second light coupling regions comprise non-linear entrance geometry.

8. The lighting device of claim 7 , wherein portions of the entrance geometry are parabolic or wedge-shaped.

9. The lighting device of claim 8 further comprising a plurality of light emitters facing the entrance geometry.

10. The lighting device of claim 9 , wherein the light emitters are light emitting diodes (LEDs).

11. The lighting device of claim 10 , wherein the LEDs are configured to emit red, blue, or green light.

12. The lighting device of claim 7 further comprising a plurality of reflective sleeves covering portions of the first and second light coupling regions.

13. The lighting device of claim 12 , wherein the reflective sleeves are specularly reflective.

14. The lighting device of claim 12 , wherein the reflective sleeves comprise a textured surface.

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

16. The lighting device of claim 15 , wherein the one or more reflective sidewalls are specularly reflective.

17. The lighting device of claim 15 , wherein the one or more sidewalls comprise a plurality of sidewall apertures by which the waveguide optic interfaces with a light source.

18. The lighting device of claim 15 , wherein the optical insert further comprises a reflective base wall.

19. The lighting device of claim 18 , wherein the one or more reflective sidewalls and the reflective base wall define a reflective compartment in which the waveguide optic is positioned.

20. The lighting device of claim 18 , wherein the one or more reflective sidewalls are angled with respect to the base wall.

21. The lighting device of claim 18 , wherein the reflective sidewalls are terraced.

22. A lighting fixture incorporating the lighting device of claim 1 , wherein the lighting fixture is configured to emit a distribution of light that meets the requirements of Type V.

23. The lighting fixture of claim 22 , wherein the lighting fixture is configured to output at least 24,000 lumens.

24. A waveguide optic of an optic assembly, the waveguide optic comprising:
a plurality of sidewalls;
a light extraction face disposed between the plurality of sidewalls; and
at least two sets of light extraction elements disposed over the light extraction face, wherein the at least two sets of light extraction elements are disposed on opposing sides of an axis of symmetry.

25. The waveguide optic of claim 24 , wherein each set of light extraction elements comprises a plurality of non-linear extraction elements.

26. The waveguide optic of claim 25 , wherein the non-linear extraction elements are arcuate.

27. The waveguide optic of claim 24 , wherein each set of light extraction elements comprises one or more non-linear extraction elements and one or more linear extraction elements.

28. The waveguide optic of claim 24 , wherein the waveguide optic further comprises a light redirecting face opposite the light extraction face and a plurality of light redirection elements disposed over the light redirecting face.

29. The waveguide optic of claim 24 further comprising a first light coupling region disposed proximate a first set of light extraction elements and a second light coupling region disposed proximate a second set of light extraction elements.

30. The waveguide optic of claim 29 , wherein the first and second light coupling regions comprise a non-linear entrance geometry.

31. The waveguide optic of claim 24 , wherein the waveguide is at least 12 mm thick.

32. The waveguide optic of claim 30 , wherein portions of the entrance geometry are parabolic or wedge-shaped.

33. The waveguide optic of claim 30 , wherein the entrance geometry comprises a patterned surface.

34. A lighting fixture incorporating the waveguide optic of claim 24 , wherein the lighting fixture is configured to emit a distribution of light that meets the requirements of Type V.

35. A waveguide optic of an optic assembly comprising:
a front face comprising at least two sets of light extraction elements;
a rear face opposite the front face;
an entrance geometry defined between the front and rear faces; and
a plurality of light emitting diodes (LEDs) facing the entrance geometry, wherein the LEDs emit light towards the entrance geometry in a first direction, and wherein the light extraction elements extract the light in a second direction that at least partially opposes the first direction.

36. The waveguide optic of claim 35 , wherein the entrance geometry comprises a plurality of columnar facets configured to deflect light into a waveguide body of the waveguide optic.

37. The waveguide optic of claim 35 , wherein a first row of linearly-arrayed LEDs couples to the optic waveguide proximate a horizontal plane at a center of the waveguide.

38. The waveguide optic of claim 37 , wherein the first row of linearly-arrayed LEDs coupled the optic waveguide proximate the horizontal plane is offset relative to a vertical plane at the center of the waveguide.

39. The waveguide optic of claim 35 , wherein a plurality of linearly-arrayed LEDs couple to the entrance geometry.

40. The waveguide optic of claim 36 , wherein the columnar facets are coupled to at least two differently colored LEDs.

41. The waveguide optic of claim 36 , wherein each facet has an asymmetric surface.

42. The waveguide optic of claim 41 further comprising multiple entrance geometries, and wherein each entrance geometry aligns with a sidewall aperture of an optic insert that houses the waveguide optic.

43. A waveguide optic of an optic assembly comprising:
a front face comprising a plurality of light extracting elements;
a rear face comprising

Assignees

• Cree Inc

Inventors

• Lim Jin Hong
• Wilcox Kurt
• Karpichev Boris
• Walker Donald

Classifications

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• G02B6/0031

  Reflecting element, sheet or layer · CPC title

• G02B6/0085

  Means for removing heat created by the light source from the package · CPC title

• G02B6/0068

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

• G02B6/0036

  2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title