LIGHTING DEVICE WITH HEAT DISSIPATION ELEMENTS

• US 20110267821A1
• Filed: 02/07/2011
• Published: 11/03/2011
• Est. Priority Date: 02/12/2010
• Status: Abandoned Application

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Darley, Ian, Negley, Gerald H., VAN DE VEN, Antony Paul, Bertock, Martin
• Application Number:
  US13/022,142
• Publication Number:
  US 20110267821A1
• Time in Patent Office: Days
• US Class Current: 362/249.02
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/505 of reflectors
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/85 characterised by the material liquid coolants F21V29/56
• CPC Class Codes: F21V 29/86 Ceramics or glass
• CPC Class Codes: F21V 29/87 Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting device, comprising a solid state light emitter and first and second heat dissipation elements. In some devices, (1) the first heat dissipation element is in the path of at least some of the light emitted, (2) at least half of the 25% of the surface area of a first heat dissipation element that is closest to the first solid state light emitter is exposed, (3) at least part of a heat dissipation element is transparent or reflective, and a portion light from the light emitter goes in a specified range of directions, (4) angular size of gaps between heat dissipation elements are limited, and/or (5) at least 25% of heat generated by the light emitter(s) is dissipated in regions toward which light emitted by light emitter(s) is directed. Also, a lighting device comprising a solid state light emitter and means for dissipating heat.

Claims

1. A lighting device, comprising:

at least a first solid state light emitter; and

at least a first heat dissipation element and a second heat dissipation element,

the first heat dissipation element and the first solid state light emitter positioned and oriented relative to one another such that if the first solid state light emitter is illuminated, at least a portion of the first heat dissipation element is in the path of at least some of the light emitted by the first solid state light emitter.

2. A lighting device as recited in claim 1, wherein at least 20% of a volume defined by an exterior of the lighting device is exposed.

3. A lighting device as recited in claim 1, wherein the first solid state light emitter is exposed to an ambient medium that is outside the lighting device.

4. A lighting device as recited in claim 3, wherein the ambient medium can reach the solid state light emitter in at least fifteen different routes that are separated from each other by at least one heat dissipation element.

5. A lighting device as recited in claim 1, wherein:

at least 25 percent of light emitted by the first solid state light emitter is incident on one of the heat dissipation elements, and at least 50 percent of the light emitted by the first solid state light emitter that is incident on one of the heat dissipation elements eventually exits the lighting device.

6. A lighting device as recited in claim 1, wherein at least 75% of all of the light emitted by the first solid state light emitter that exits the lighting device passes through at least one heat dissipation element, is reflected by at least one heat dissipation element or passes within one inch of at least one heat dissipation element.

7. A lighting device as recited in claim 1, wherein at least 50% of an entire external surface area of the first heat dissipation element and at least 50% of an entire external surface area of the second heat dissipation element are exposed.

8. A lighting device as recited in claim 1, wherein a first line extending through a center of the first solid state light emitter and a center of gravity of the first heat dissipation element and a second line extending through a center of the first solid state light emitter and a center of gravity of the second heat dissipation element define an angle of not more than 80 degrees.

9. A lighting device as recited in claim 1, wherein:

the first heat dissipation element has a first surface in a first plane,

the second heat dissipation element has a second surface in a second plane, and

the first plane defines an angle of between 5 degrees and 80 degrees relative to the second plane.

10. A lighting device as recited in claim 9, wherein the first plane and the second plane each include an axis of the lighting device.

11. A lighting device as recited in claim 9, wherein:

the lighting device comprises at least a third heat dissipation element, a fourth heat dissipation element and a fifth heat dissipation element in addition to the first heat dissipation element and the second heat dissipation element,

the third heat dissipation element has a third surface in a third plane,

the fourth heat dissipation element has a fourth surface in a fourth plane,

the fifth heat dissipation element has a fifth surface in a fifth plane, and

each of the first plane, the second plane, the third plane, the fourth plane and the fifth plane defines an angle of not more than 80 degrees with respect to each of the others of the first plane, the second plane, the third plane, the fourth plane and the fifth plane.

12. A lighting device as recited in claim 11, wherein the first plane, the second plane, the third plane, the fourth plane and the fifth plane each include an axis of the lighting device.

13. A lighting device as recited in claim 9, wherein:

the lighting device comprises at least a third heat dissipation element, a fourth heat dissipation element, a fifth heat dissipation element, a sixth heat dissipation element, a seventh heat dissipation element and an eighth heat dissipation element in addition to the first heat dissipation element and the second heat dissipation element,

the third heat dissipation element has a third surface in a third plane,

the fourth heat dissipation element has a fourth surface in a fourth plane,

the fifth heat dissipation element has a fifth surface in a fifth plane,

the sixth heat dissipation element has a sixth surface in a sixth plane,

the seventh heat dissipation element has a seventh surface in a seventh plane,

the eighth heat dissipation element has an eighth surface in an eighth plane, and

each of the first plane, the second plane, the third plane, the fourth plane, the fifth plane, the sixth plane, the seventh plane and the eighth plane defines an angle of not more than 80 degrees with respect to each of the others of the first plane, the second plane, the third plane, the fourth plane, the fifth plane, the sixth plane, the seventh plane and the eighth plane.

14. A lighting device as recited in claim 1, wherein at least a portion of at least one of the heat dissipation elements is transparent or reflective.

15. A lighting device as recited in claim 1, wherein if the first solid state light emitter is illuminated, at least some light emitted by the at least a first solid state light emitter exits the lighting device in a first direction and at least some light emitted by the at least a first solid state light emitter exits the lighting device in a second direction, the first direction defining an angle of at least 90 degrees relative to the second direction.

16. A lighting device as recited in claim 1, wherein:

at least a portion of at least one heat dissipation element is in each of eight quadrants defined by first, second, third and fourth planes, each of the first, second, third and fourth planes including an axis of the lighting device, the second plane rotated clockwise 45 degrees relative to the first plane, the third plane rotated clockwise 45 degrees relative to the second plane, the fourth plane rotated clockwise 45 degrees relative to the third plane, whereby the first, second, third and fourth planes are evenly spaced, and

no heat dissipation element includes portions that are in each of three or more of the eight quadrants.

17. A lighting device as recited in claim 1, wherein:

at least a portion of at least one heat dissipation element is in each of sixteen quadrants defined by first through eighth planes, each of the first through eighth planes including an axis of the lighting device and being evenly radially spaced, and

no heat dissipation element includes portions that are in each of three or more of the sixteen quadrants.

18. A lighting device as recited in claim 1, wherein:

at least a portion of at least one heat dissipation element is in each of thirty-two quadrants defined by first through sixteenth planes, each of the first through sixteenth planes including an axis of the lighting device and being evenly radially spaced, and

no heat dissipation element includes portions that are in each of three or more of the thirty-two quadrants.

19. A lighting device as recited in claim 1, wherein the lighting device is an A lamp.

20. A lighting device as recited in claim 1, wherein at least a first portion of the first heat dissipation element is devoid of transparency, the first portion in the path of at least some of the light emitted by the first solid state light emitter.

21. A lighting device, comprising:

at least a first solid state light emitter; and

at least a first heat dissipation element and a second heat dissipation element,

at least half of the 25% of the surface area of the first heat dissipation element that is closest to the first solid state light emitter being exposed.

22. A lighting device as recited in claim 21, wherein at least 75% of all of the light emitted by the first solid state light emitter that exits the lighting device passes through at least one heat dissipation element, is reflected by at least one heat dissipation element or passes within one inch of at least one heat dissipation element.

23. A lighting device as recited in claim 21, wherein at least a portion of at least one of the heat dissipation elements is transparent or reflective.

24. A lighting device as recited in claim 21, wherein the lighting device is an A lamp.

25. A lighting device, comprising:

at least a first solid state light emitter; and

at least first and second heat dissipation elements, at least a portion of at least one of the heat dissipation elements being transparent or reflective,

wherein at least 90 percent of all light emitted by the first solid state light emitter that exits the lighting device travels in directions that define angles that are not greater than 60 degrees relative to a line that extends through the first solid state light emitter.

26. A lighting device as recited in claim 25, wherein at least 75% of all of the light emitted by the first solid state light emitter that exits the lighting device passes through at least one heat dissipation element, is reflected by at least one heat dissipation element or passes within one inch of at least one heat dissipation element.

27. A lighting device as recited in claim 25, wherein the lighting device is an A lamp.

28. A lighting device, comprising:

at least a first solid state light emitter; and

at least first and second heat dissipation elements,

any line that passes through a center of the first solid state light emitter and a point on a hemisphere whose circular edge is (1) centered on the center of the first solid state light emitter and (2) on a plane that is perpendicular to an axis of the lighting device, defines an angle of not more than 45 degrees relative to at least one line that passes through the center of the first solid state light emitter and at least one point on a heat dissipation element of the lighting device.

29. A lighting device as recited in claim 28, wherein at least 75% of all of the light emitted by the first solid state light emitter that exits the lighting device passes through at least one heat dissipation element, is reflected by at least one heat dissipation element or passes within one inch of at least one heat dissipation element.

30. A lighting device as recited in claim 28, wherein the lighting device is an A lamp.

31. A lighting device, comprising:

at least a first solid state light emitter; and

at least first and second heat dissipation elements,

wherein at least 25% of heat generated by the at least one solid state light emitter is dissipated in regions toward which light emitted by the at least one solid state light emitter is directed.

32. A lighting device as recited in claim 31, wherein at least 75% of all of the light emitted by the first solid state light emitter that exits the lighting device passes through at least one heat dissipation element, is reflected by at least one heat dissipation element or passes within one inch of at least one heat dissipation element.

33. A lighting device as recited in claim 31, wherein the lighting device is an A lamp.

34. A lighting device, comprising:

at least a first solid state light emitter; and

means for dissipating heat.

35. A lighting device as recited in claim 34, wherein the means for dissipating heat comprises at least a first heat dissipation element and a second heat dissipation element,

the first heat dissipation elements and the first solid state light emitter positioned and oriented relative to one another such that if the first solid state light emitter is illuminated, at least a portion of the first heat dissipation element is in the path of at least some of the light emitted by the first solid state light emitter.

36. A lighting device as recited in claim 34, wherein the means for dissipating heat comprises at least two heat dissipation elements, and wherein at least half of the 25% of the surface area of the first heat dissipation element that is closest to the first solid state light emitter is exposed to an ambient medium.

37. A lighting device as recited in claim 34, wherein the means for dissipating heat comprises at least two heat dissipation elements, and wherein at least 90 percent of all light emitted by the first solid state light emitter that exits the lighting device travels in directions that define angles that are not greater than 60 degrees relative to a line that extends through the first solid state light emitter.

38. A lighting device as recited in claim 34, wherein the means for dissipating heat comprises at least two heat dissipation elements, and any line that passes through a center of the first solid state light emitter and a point on a hemisphere whose circular edge is (1) centered on the center of the first solid state light emitter and (2) on a plane that is perpendicular to an axis of the lighting device, defines an angle of not more than 45 degrees relative to at least one line that passes through the center of the first solid state light emitter and at least one point on a heat dissipation element of the lighting device.

39. A lighting device as recited in claim 34, wherein the means for dissipating heat comprises at least two heat dissipation elements, and wherein at least 25% of heat generated by the at least one solid state light emitter is dissipated in regions toward which light emitted by the at least one solid state light emitter is directed.

40. A lighting device, comprising:

at least a first solid state light emitter; and

at least a first heat dissipation element, at least a first portion of the first heat dissipation element devoid of transparency,

the first heat dissipation element and the first solid state light emitter positioned and oriented relative to one another such that if the first solid state light emitter is illuminated, at least the first portion of the first heat dissipation element is in the path of at least some of the light emitted by the first solid state light emitter.

41. A lighting device, comprising:

an electrical connector;

at least a first solid state light emitter; and

at least a first heat dissipation element, at least a portion of the first heat dissipation element on a first side of a first plane extending through the first solid state light emitter, the electrical connector on a second side of the first plane.

42. A lighting device as recited in claim 41, wherein at least a first portion of the first heat dissipation element devoid of transparency.

43. A lighting device as recited in claim 41, wherein the first plane is an emission plane of the first solid state light emitter.

44. A lighting device as recited in claim 41, wherein the electrical connector is an Edison plug.