Solid state lighting components

Patent metadata

Field	Value
Publication number	US-10683971-B2
Application number	US-201615143261-A
Country	US
Kind code	B2
Filing date	Apr 29, 2016
Priority date	Apr 30, 2015
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

Solid state lighting components are provided with improved color rendering, improved color uniformity, and improved directional lighting, and that are suitable for use in high output lighting applications and can be used in place of CDMH bulb lighting. Exemplary solid state lighting components include a substrate comprising a light emitter surface and or more light emitters disposed on and/or over the light emitter surface. Exemplary components include a light directing optic and/or a diffusing optic for mixing light. The light directing optic may be disposed at least partially around a perimeter of the light emitter surface. The diffusing optic may be disposed between portions of the light directing optic and spaced apart from the light emitter surface.

First claim

What is claimed is:

1. A solid state lighting component comprising:
a substrate;
one or more light emitters disposed over the substrate, wherein a surface area of the substrate that is occupied by the one or more light emitters defines a light emitter surface;
a light directing optic comprising a reflective surface disposed around a perimeter of the light emitter surface;
a diffusing optic disposed between portions of the light directing optic and over the one or more light emitters; and
a hollow spacer in a form of a color mixing chamber that is disposed on the substrate such that at least a portion of the diffusing optic is spaced a distance away from the light emitter surface,
wherein the diffusing optic is positioned over the color mixing chamber, which spaces the diffusing optic a distance away from the light emitter surface,
wherein the color mixing chamber has a texturized inner surface, and
wherein the diffusing optic is centered with respect to the light directing optic.

2. The component of claim 1 , wherein the distance is greater than one-half of a width of the light emitter surface.

3. The component of claim 1 , wherein the distance is greater than 9.5 mm.

4. The component of claim 1 , wherein the light emitter surface comprises a diameter measuring approximately 19 mm or more, approximately 20 mm or more, or approximately 25 mm or more.

5. The component of claim 1 , wherein the light directing optic comprises a reflector, and wherein the reflector is configured to provide light having a beam angle that is between approximately 20° and 30°.

6. The component of claim 1 , wherein the reflective surface is texturized.

7. The component of claim 1 , wherein a center beam candlepower is approximately 14,000 candela.

8. The component of claim 1 , comprising a color rendering index (CRI) of approximately 80 CRI or more.

9. The component of claim 1 , wherein the diffusing optic comprises a film, a disk, a sheet, a plate, a lens, a cone, a cover, a dome, or a three-dimensional structure having one or more walls.

10. The component of claim 1 , wherein the texturized inner surface of the color mixing chamber comprises dimples.

11. The component of claim 1 , wherein the diffusing optic is twist or rotatably lockable to or within a component housing.

12. The component of claim 1 , wherein the color mixing chamber is integrally formed with the diffusing optic.

13. The component of claim 1 , wherein the color mixing chamber comprises one or more vents for dissipating heat.

14. The component of claim 1 , wherein the color mixing chamber has an outer surface comprising one or more facets.

15. A solid state lighting component comprising:
a substrate;
one or more light emitters disposed on or over the substrate, wherein a surface area of the substrate that is occupied by the one or more light emitters defines a light emitter surface;
a light directing optic disposed around the light emitter surface;
a diffusing optic disposed between portions of the light directing optic and the light emitter surface; and
a hollow spacer disposed on the substrate such that at least a portion of the diffusing optic is spaced a distance away from the light emitter surface, wherein the distance is greater than a radius of the light emitter surface.

16. The component of claim 15 , wherein the spacer comprises plastic.

17. The component of claim 15 , wherein the spacer comprises a cylindrical shape and is configured to scatter, reflect, or diffuse light emitted by the one or more light emitter.

18. The component of claim 17 , wherein the spacer comprises a clear tube.

19. The component of claim 15 , wherein the diffusing optic and the spacer are integral.

20. The component of claim 15 , wherein the diffusing optic and the spacer are separate, discrete components.

21. The component of claim 15 , wherein the distance is greater than 9.5 mm.

22. The component of claim 15 , wherein the light directing optic comprises a reflector, and wherein the reflector is configured to provide light having a beam angle that is between approximately 20° and 30°.

23. The component of claim 15 , wherein portions of the light directing optic are texturized.

24. The component of claim 15 , wherein a center beam candlepower is approximately 14,000 candela.

25. The component of claim 15 , comprising a color rendering index (CRI) of approximately 80 CRI or more.

26. The component of claim 15 , wherein the diffusing optic comprises a film, a disk, a sheet, a plate, a lens, a cone, a cover, a dome, or a three-dimensional structure having one or more walls.

27. The component of claim 15 , wherein the diffusing optic is twist or rotatably lockable to or within a component housing.

28. The component of claim 15 , wherein the spacer comprises one or more slots for dissipating heat.

29. The component of claim 15 , wherein the diffusing optic is mounted to an inner surface of the light directing optic.

30. A solid state lighting component comprising:
a substrate;
at least two light emitters disposed over the substrate, wherein a surface area of the substrate that is occupied by the one or more light emitters defines a light emitter surface, and wherein a first light emitter is configured to emit a first color of light, and a second light emitter is configured to emit a second color of light;
a diffusing optic disposed over the at least two light emitters, wherein a portion of the diffusing optic is positioned a distance away from the light emitter surface; and
a light directing optic configured for receiving and reflecting light that passes through the diffusing optic;
wherein the light directing optic is mounted to the solid state lighting component by attachment only to the diffusing optic.

31. The component of claim 30 , wherein the solid state lighting component is configured to provide light with a beam angle of approximately 15° or more, approximately 20° or more, approximately 25° or more, approximately 30° or more, approximately 40° or more, or approximately 60° or more.

32. The component of claim 30 , wherein the centered light beam comprises a color rendering index (CRI) of approximately 80 CRI or more.

33. The component of claim 30 , wherein the diffusing optic is coaxially disposed with respect to the light directing optic.

34. The component of claim 30 , wherein the first color is primarily blue and the second color is primarily red.

35. The component of claim 30 , wherein the component is operable to output at least approximately 90 lumens per watt (LPW) or more at 30 Watts (W).

36. The component of claim 30 , wherein the component is operable to output at least approximately 120 lumens per watt (LPW) or more at 30 Watts (W).

37. The component of claim 30 , wherein the component is operable to output at least approximately 140 lumens per watt (LPW) or more at 30 Watts (W).

38. The component of claim 30 , wherein a centered beam candlepower is approximately 14,000 candela.

39. The component of claim 30 , wherein the diffusing optic comprises a substantially planar surface.

Assignees

• Cree Inc

Inventors

• Tudorica Florin A
• Hussell Christopher P
• Durkee John Wesley
• Andrews Peter Scott
• Cash Mark
• Randolph David

Classifications

• F21K9/66 Primary

  Details of globes or covers forming part of the light source · CPC title

• F21V29/506

  of globes, bowls or cover glasses · CPC title

• F21V23/008

  the casing being outside the housing of the lighting device · CPC title

• F21V13/02

  Combinations of only two kinds of elements · 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