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US 8,552,626 B1Granted
Lighting device with reverse tapered heatsink
AssigneeCree, Inc.
InventorAntony Paul van de Ven
Life of this patent
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Abstract
A solid state lighting devices includes a heatsink having a first end arranged proximate to a base end, and a second end arranged between the first end and a solid state emitter, wherein at least a portion of the heatsink is wider at point intermediate the first end and the second end than the width of the heatsink at the second end. Such reverse angled heatsink reduces obstruction of light. A heatsink may include multiple fins and a heatpipe.
Claims27
A solid state lighting device comprising:
- a base end;
- at least one solid state emitter;
- a light-transmissive cover arranged to cover the at least one solid state emitter and transmit at least a portion of emissions generated by the at least one solid state emitter;
- and
- a heatsink disposed between the base end and the at least one solid state emitter, and arranged to dissipate heat generated by the at least one solid state emitter;
- wherein:
- the heatsink comprises a first heatsink end and comprises a first width at the first heatsink end;
- the heatsink comprises a second heatsink end and comprises a second width at the second heatsink end;
- the base end is closer to the first heatsink end than to the second heatsink end;
- at least a portion of the heatsink disposed between the first heatsink end and the second heatsink end comprises a third width that is greater than the second width;
- and
- the heatsink comprises a maximum width dimension that is substantially equal to a corresponding maximum width dimension of the cover.
9 more elements
A solid state lighting device comprising:
- a base end;
- at least one solid state emitter;
- a light-transmissive cover comprising a curved or hemispherical outer surface, and arranged to cover the at least one solid state emitter and transmit at least a portion of emissions generated by the at least one solid state emitter;
- and
- a heatsink comprising a plurality of fins disposed between the base end and the at least one solid state emitter, and arranged to dissipate heat generated by the at least one solid state emitter;
- wherein:
- the heatsink comprises a first heatsink end and comprises a first width at the first heatsink end;
- the heatsink comprises a second heatsink end and comprises a second width at the second heatsink end;
- the base end is closer to the first heatsink end than to the second heatsink end;
- at least a portion of the heatsink disposed between the first heatsink end and the second heatsink end comprises a third width that is greater than the second width;
- the solid state lighting device comprises a substantially central axis extending in a direction between the base end and an emitter mounting area, wherein the heatsink is arranged to permit unobstructed emission of light generated by the at least one solid state emitter according to each emission half-angle of at least about 135 degrees relative to the substantially central axis around an entire lateral perimeter of the solid state lighting device.
8 more elements
Dependencies are inferred from the claim text.