LED lighting apparatus with facilitated heat transfer and fluid seal
First Claim
1. Lighting apparatus comprising:
- a circuit board with a plurality of light sources spaced thereon;
a heat sink open to water/air flow, the circuit board being in thermal contact with the heat sink;
an optical member comprising (a) a plurality of lens portions over corresponding light sources and (b) a flange portion in contact with the circuit board and having a peripheral region extending beyond the perimeter of the circuit board and encircling an inner region between the lens portions and the circuit board; and
a securement frame securing the optical member over the light sources, the securement frame applying force to the peripheral region of the optical member toward the circuit board such that the inner and peripheral regions of the optical member press the circuit board against the heat sink, the peripheral region of the optical member sandwiching a gasket against the heat sink thereby facilitating fluid-tight sealing of the circuit board.
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0 Petitions
Accused Products
Abstract
LED lighting apparatus including (a) a circuit board which has a plurality of light sources spaced thereon, (b) a heat sink to which the circuit board is thermally coupled, and (c) a securement structure which includes a rigid peripheral structure applying force along a peripheral area of the circuit board toward the heat sink to increase the thermal coupling therebetween to facilitate heat transfer from the light sources during operation. The lighting apparatus may also include an optical member with a plurality of lens portions over corresponding light sources and a peripheral region, the securement structure engaging the peripheral region which sandwiches a gasket against the heat sink. The apparatus may use manipulation involving surface convexity, such as bowing, thereby allowing the securement structure to further facilitate surface-to-surface thermal coupling between the circuit board and the heat sink.
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Citations
24 Claims
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1. Lighting apparatus comprising:
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a circuit board with a plurality of light sources spaced thereon; a heat sink open to water/air flow, the circuit board being in thermal contact with the heat sink; an optical member comprising (a) a plurality of lens portions over corresponding light sources and (b) a flange portion in contact with the circuit board and having a peripheral region extending beyond the perimeter of the circuit board and encircling an inner region between the lens portions and the circuit board; and a securement frame securing the optical member over the light sources, the securement frame applying force to the peripheral region of the optical member toward the circuit board such that the inner and peripheral regions of the optical member press the circuit board against the heat sink, the peripheral region of the optical member sandwiching a gasket against the heat sink thereby facilitating fluid-tight sealing of the circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Lighting apparatus comprising:
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a circuit board with a plurality of light sources spaced thereon; a heat sink open to water/air flow, the circuit board being in thermal contact with the heat sink; an optical member comprising (a) a plurality of lens portions over corresponding light sources and (b) a flange portion in contact with the circuit board and having an inner region between the lens portions and a peripheral region extending beyond and encircling the perimeter of the circuit board; and a rigid peripheral frame securing the optical member over the light sources, the rigid peripheral frame applying force to the peripheral region of the optical member toward the circuit board such that the inner and peripheral regions of the optical member press the circuit board against the heat sink, the peripheral region of the optical member sandwiching a gasket against the heat sink to facilitate fluid-tight sealing of the circuit board. - View Dependent Claims (22, 23, 24)
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Specification