LED lamp with compact fluorescent lamp form factor
AssigneeCree, Inc.
InventorRandy Demuynck
Life of this patent
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Abstract
The LED lamp has a relatively long, narrow configuration similar to that of CFL bulbs. Because the lamp operates at relatively high power and produces significant lumens, a significant amount of heat is generated by the LED assembly. The interior envelope of the lamp, defined in traditional CFL bulbs by the fluorescent tubes, is used to house a heat sink having a shape and dimensions to fit inside of the form factor of the CFL tubes. The heat sink substantially fills the interior space of the optically transmissive enclosure in order to provide maximum surface area for dissipating heat from the LEDs. A plurality of fins may extend from the heat sink to the exterior of the lamp to dissipate heat from the LEDs to the ambient environment.
Claims20
A lamp comprising:
- a base comprising at least one pin connector;
- an elongated heat sink extending from the base, the heat sink defining at least four mounting surfaces extending along a longitudinal axis of the lamp;
- a plurality of LED assemblies, each of the plurality of LED assemblies comprising at least one LED, at least one of the plurality of LED assemblies being mounted on each of the at least four mounting surfaces, the plurality of LED assemblies being electrically coupled to the at least one pin connector through an electrical path;
- an at least partially optically transmissive enclosure defining an interior space having a first height, the heat sink having a second height where the second height is substantially the sane as the first height;
- wherein lamp electronics in the electrical path are mounted in the base using an interconnect, the interconnect comprising a plurality of first engagement members that engage a plurality of mating second engagement members on the optically transmissive enclosure in a snap-fit connection to hold the enclosure to the base.
A LED lamp comprising:
- a LED board supporting at least one LED;
- a heat sink supporting the at least one LED board;
- an optically transmissive enclosure, the heat sink and the at least one LED board being located in the enclosure;
- a lamp electronics board:
- a base comprising at least one pin connector;
- an interconnect at least partially contained in the base, the interconnect comprising a first engagement member that engages a mating engagement member on the optically transmissive enclosure to directly secure the optically transmissive enclosure to the base, a second engagement member that engages an edge of the lamp electronics board to secure the lamp electronics board directly to the interconnect and a spring electrical conductor mounted on the interconnect electrically coupling the LED board to the lamp electronics board where the spring electrical conductor is electrically coupled to the lamp electronics board and deforms into engagement with an electrical contact pad on the LED board to create a pressure contact electrical coupling.
A LED lamp comprising:
- a LED board comprising an electrical contact pad and support at least one LED;
- a lamp electronics board;
- an optically transmissive enclosure at least partially surrounding the at least one LED;
- an interconnect comprising:
- a support;
- a first engagement member that comprises a resiliently deformable finger extending from the support that resiliently directly engages the optically transmissive enclosure;
- a second engagement member that comprises a resiliently deformable finger extending from the support that resiliently directly engages the lamp electronics board to secure the lamp electronics board directly to the interconnect;
- and
- a spring electrical conductor mounted on the interconnect configured to electrically couple the LED board to the lamp electronics board where the spring electrical conductor is electrically coupled to the lamp electronics board and deforms into engagement with the electrical contact pad to create a pressure contact electrical coupling.
Dependencies are inferred from the claim text.