Lighting device
First Claim
1. A lighting device comprising a plurality of light emitting sources mounted on a thermally conductive housing and electrically connected to a circuit board, wherein said housing comprisesa base portion which is spaced apart from said circuit board, andan intermediate heat dissipation structure in thermal communication with said plurality of light emitting sources, the intermediate heat dissipation structure being disposed intermediate said circuit board and said base portion of said housing, for promoting cooling by convection, said intermediate heat dissipation structure comprising a plurality of protrusions thermally connecting said plurality of light emitting sources with said housing, said plurality of protrusions being spaced apart, with respect to each other, and wherein the spacing between adjacent protrusions is arranged so as to allow heat dissipation from said protrusions uron movement of air across said housing;
- each said light emitting source being mounted on a forward end or a free end of said protrusion so that heat generated by a light emitting source is transferable to said base portion via said protrusion for heat dissipation, and, to allow forward emission of light away from said base portion along a primary optical axis, wherein each said protrusion extends forwardly from the main housing towards the circuit board along the primary optical axis of the light emitting source mounted thereon.
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Accused Products
Abstract
A lighting device contains a plurality of light emitting sources mounted on a thermally conductive housing and electrically connected to a circuit board. The housing includes a base portion which is spaced apart from the circuit board, and an intermediate heat dissipation structure which is disposed between the circuit board and the base portion of the housing, for promoting cooling by convection. The plurality of light emitting sources are in thermal communication with the intermediate heat dissipation structure.
47 Citations
32 Claims
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1. A lighting device comprising a plurality of light emitting sources mounted on a thermally conductive housing and electrically connected to a circuit board, wherein said housing comprises
a base portion which is spaced apart from said circuit board, and an intermediate heat dissipation structure in thermal communication with said plurality of light emitting sources, the intermediate heat dissipation structure being disposed intermediate said circuit board and said base portion of said housing, for promoting cooling by convection, said intermediate heat dissipation structure comprising a plurality of protrusions thermally connecting said plurality of light emitting sources with said housing, said plurality of protrusions being spaced apart, with respect to each other, and wherein the spacing between adjacent protrusions is arranged so as to allow heat dissipation from said protrusions uron movement of air across said housing; each said light emitting source being mounted on a forward end or a free end of said protrusion so that heat generated by a light emitting source is transferable to said base portion via said protrusion for heat dissipation, and, to allow forward emission of light away from said base portion along a primary optical axis, wherein each said protrusion extends forwardly from the main housing towards the circuit board along the primary optical axis of the light emitting source mounted thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A lighting device comprising:
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a thermally conductive housing comprising a base portion, a plurality of spaced-apart protrusions extending from the base portion, and a peripheral housing surrounding said protrusions; and a plurality of light emitting sources electrically connected to a circuit board, wherein each said light emitting source is mounted on a said protrusion and in thermal communication therewith so that heat generated by said plurality of light emitting sources is transferable from said light emitting sources via said protrusions to said thermally conductive housing for heat dissipation; wherein said printed circuit board and said housing are arranged for convection cooling of said protrusions by air flow between said printed circuit board and said housing; wherein said peripheral portion of said housing is grid or cage-like, and is configured so that air entering from one lateral side of said grid or cage-like peripheral housing encounters said protrusions prior to exit from another opposite lateral side of said housing. - View Dependent Claims (30, 31)
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32. A lighting device comprising:
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a thermally conductive housing and a plurality of light emitting sources electrically connected to a circuit board, wherein said housing comprises a base portion which is spaced apart from said circuit board and an intermediate heat dissipation structure which is disposed intermediate said circuit board and said base portion of said housing, said intermediate heat dissipation structure being arranged for promoting cooling by convection; each said light emitting source is mounted on a said protrusion and in thermal communication therewith so that heat generated by said plurality of light emitting sources is transferable from said light emitting sources via said protrusions to said thermally conductive housing for heat dissipation; and said circuit board being spaced apart from said base portion of said housing such that a space for dissipation of heat by convection is formed between said circuit board and said base portion of said housing; wherein at least one thermally conductive heat dissipation member for heat dissipation is disposed intermediate said printed circuit board and the base of said protrusions, said thermally conductive member being thermally coupled to said protrusions, and said housing, so that a portion of heat generated by said plurality of light emitting sources is transferred to said housing via said protrusions and said thermally conductive heat dissipation member.
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Specification