LED lamp and heat sink
First Claim
1. A lamp comprising:
- an at least partially optically transmissive enclosure;
a base comprising lamp electronics defining a longitudinal axis extending from the base to the enclosure;
at least one LED located in the enclosure and operable to emit light when energized through an electrical path from the base;
a heat sink comprising a heat dissipating portion that is at least partially exposed to the ambient environment, the heat dissipating portion comprising a plurality of flat planar fins arranged substantially parallel to the longitudinal axis, the plurality of flat planar fins having inner edges that are disposed adjacent to and extend along the longitudinal axis such that the plurality of flat planar fins extend substantially radially from the longitudinal axis and define spaces between the plurality of flat planar fins, the inner edges being spaced from one another such that an interior open space is formed at the center of the heat sink that communicates with the spaces to allow air flow radially across the heat sink wherein the inner edges of the plurality of fins, along the entire length thereof, are flared and overlap but are spaced from one another to cover the interior open space while allowing air flow radially across the heat sink.
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Accused Products
Abstract
A lamp has an at least partially optically transmissive enclosure and a base that retains lamp electronics. LEDs are located in the enclosure and are operable to emit light when energized through an electrical path from the base. The LEDs are thermally isolated from the lamp electronics in the base. A heat sink is disposed between the base and the enclosure. The heat sink includes a heat conducting portion that is thermally coupled to the LEDs and a heat dissipating portion that is exposed to the ambient environment. The heat dissipating portion includes fins that have inner edges and create spaces between adjacent ones of the fins. The inner edges are spaced from one another to define an interior open space where the interior open space communicates with the spaces between the fins.
104 Citations
14 Claims
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1. A lamp comprising:
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an at least partially optically transmissive enclosure; a base comprising lamp electronics defining a longitudinal axis extending from the base to the enclosure; at least one LED located in the enclosure and operable to emit light when energized through an electrical path from the base; a heat sink comprising a heat dissipating portion that is at least partially exposed to the ambient environment, the heat dissipating portion comprising a plurality of flat planar fins arranged substantially parallel to the longitudinal axis, the plurality of flat planar fins having inner edges that are disposed adjacent to and extend along the longitudinal axis such that the plurality of flat planar fins extend substantially radially from the longitudinal axis and define spaces between the plurality of flat planar fins, the inner edges being spaced from one another such that an interior open space is formed at the center of the heat sink that communicates with the spaces to allow air flow radially across the heat sink wherein the inner edges of the plurality of fins, along the entire length thereof, are flared and overlap but are spaced from one another to cover the interior open space while allowing air flow radially across the heat sink. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification