Lighting device having heat dissipation element

Patent metadata

Field	Value
Publication number	US-9982847-B2
Application number	US-201213425689-A
Country	US
Kind code	B2
Filing date	Mar 21, 2012
Priority date	Sep 25, 2009
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A lighting device comprising at least a first light source and at least a first heat dissipation element. At least a first region of the dissipation element comprises at least one material selected from among (1) sintered silicon carbide, (2) a sintered mixture of silicon carbide and at least one other ceramic material, (3) a sintered mixture of silicon carbide and at least one metal other than aluminum, (4) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal other than aluminum and (5) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal. Also, a lighting device comprising at least a first light source and heat conducting means for dissipating heat.

First claim

The invention claimed is:

1. A lighting device comprising:
at least a first light source; and
at least a first heat dissipation element, at least a first region of the first heat dissipation element comprising at least one material selected from among (1) a sintered mixture of silicon carbide and at least one other ceramic material, (2) a sintered mixture of silicon carbide and at least one metal other than aluminum, (3) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal other than aluminum and (4) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal,
the first light source oriented such that at least a portion of light emitted from the first light source is directed toward at least a first portion of the first region of the first heat dissipation element.

2. A lighting device as recited in claim 1 , wherein at least a portion of the first heat dissipation element is substantially cylindrical.

3. A lighting device as recited in claim 1 , wherein at least a portion of the first heat dissipation element is substantially disc-shaped.

4. A lighting device as recited in claim 1 , wherein at least a portion of the first heat dissipation element is substantially bulb-shaped.

5. A lighting device as recited in claim 1 , wherein the first light source is in contact with the first heat dissipation element.

6. A lighting device as recited in claim 5 , wherein the first light source is in direct contact with the first heat dissipation element.

7. A lighting device as recited in claim 1 , wherein at least a first cross-section of the first heat dissipation element is substantially annular.

8. A lighting device as recited in claim 1 , wherein the first heat dissipation element comprises at least one opaque region.

9. A lighting device as recited in claim 1 , wherein the first heat dissipation element comprises at least a first reflective region.

10. A lighting device as recited in claim 1 , wherein the first region of the first heat dissipation element further comprises at least one material selected from among scattering agents and luminescent materials.

11. A lighting device as recited in claim 1 , wherein at least a second region of the first heat dissipation element comprises at least one material selected from among diamond, glass, polymer and ceramic.

12. A lighting device as recited in claim 1 , wherein the first region of the first heat dissipation element is substantially transparent.

13. A lighting device as recited in claim 1 , wherein substantially all light emitted by the first light source that exits the lighting device passes through the first heat dissipation element.

14. A lighting device comprising:
at least a first light source; and
at least a first heat dissipation element, at least a first region of the first heat dissipation element comprising at least one material selected from among (1) a sintered mixture of silicon carbide and at least one other ceramic material, (2) a sintered mixture of silicon carbide and at least one metal other than aluminum, (3) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal other than aluminum and (4) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal, at least a first portion of the first region of the first heat dissipation element substantially surrounding the first light source.

15. A lighting device as recited in claim 1 , wherein substantially all light emitted by the first light source that exits the lighting device passes through the first heat dissipation element.

16. A lighting device as recited in claim 14 , wherein the first light source is in contact with the first heat dissipation element.

17. A lighting device as recited in claim 14 , wherein the first light source is in direct contact with the first heat dissipation element.

18. A lighting device as recited in claim 14 , wherein at least a first region of the first heat dissipation element comprises at least one material selected from among diamond, glass, polymer and ceramic.

19. A lighting device as recited in claim 1 , wherein the first light source comprises at least one solid state light emitter.

20. A lighting device as recited in claim 1 , wherein the first light source comprises at least one light emitting diode.

21. A lighting device comprising:
at least a first light source;
at least a first heat dissipation element; and
at least a first reflector,
at least a first region of the first heat dissipation element comprising at least one material selected from among (1) a sintered mixture of silicon carbide and at least one other ceramic material, (2) a sintered mixture of silicon carbide and at least one metal other than aluminum, (3) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal other than aluminum and (4) a sintered mixture of silicon carbide, at least one other ceramic material and at least one metal,
the first light source and at least a first portion of the first region of the first heat dissipation element both to a first side of the first reflector.

22. A lighting device as recited in claim 21 , wherein at least a portion of light emitted by the first light source that exits the lighting device passes through the first heat dissipation element.

Assignees

• Van De Ven Antony Paul
• Coleman Thomas G
• Negley Gerald H
• Cree Inc

Inventors

• Van De Ven Antony Paul
• Coleman Thomas G
• Negley Gerald H

Classifications

• F21V29/85

  characterised by the material (liquid coolants F21V29/56) · CPC title

• F21K9/00 Primary

  Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers · CPC title

• F21V29/74

  with fins or blades · CPC title

• F21V7/0008

  providing for indirect lighting · CPC title

• F21V29/86

  Ceramics or glass · CPC title