Led lamp

Patent metadata

Field	Value
Publication number	US-2016245462-A1
Application number	US-201514630926-A
Country	US
Kind code	A1
Filing date	Feb 25, 2015
Priority date	Feb 25, 2015
Publication date	Aug 25, 2016
Grant date	—

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.

First claim

1 . 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 same as the first height.

2 . The lamp of claim 1 wherein the lamp has a length of between approximately 4 inches and approximately 8½ inches.

3 . The lamp of claim 2 wherein the lamp has a width of approximately 1 inch to approximately 2 inches.

4 . The lamp of claim 1 wherein the at least one LED produces at least 900 lumens.

5 . The lamp of claim 1 wherein the base comprises a lower housing, an upper housing and a middle housing where the upper housing and the middle housing are made of a thermally conductive material and wherein first engagement members on one of the lower housing and the middle housing engage mating second engagement members on the other one of the lower housing and the middle housing to connect the middle housing to the lower housing in a snap-fit connection.

6 . The lamp of claim 1 wherein lamp electronics in the electrical path are mounted in the base using an interconnect.

7 . The lamp of claim 6 wherein the interconnect comprises a plurality of third engagement members that engage a plurality of mating fourth engagement members on the optically transmissive enclosure in a snap-fit connection to hold the enclosure to the base.

8 . The lamp of claim 6 wherein the lamp electronics are mounted on an electronics board and the interconnect comprises a plurality of fifth engagement members that engage the electronics board in a snap-fit connection.

9 . The lamp of claim 6 wherein the lamp electronics are mounted on an electronics board and spring conductors are electrically coupled to the electronics board, the spring conductors being biased into engagement with the LED assemblies.

10 . The lamp of claim 9 wherein the spring conductors are inserted through apertures formed in the interconnect.

11 . The lamp of claim 1 wherein the heat sink is formed as a tower that extends from the base along the longitudinal axis of the lamp.

12 . The lamp of claim 1 wherein the mounting surfaces comprise a generally planar surface that is thermally coupled to the at least one of the plurality of LED assemblies.

13 . The lamp of claim 1 wherein a plurality of fins extend from the heat sink and extend to the exterior of the lamp to dissipate heat from the LEDs to the ambient environment.

15 . The lamp of claim 1 wherein the lamp operates to produce at least 80 lumens per Watt.

16 . The lamp of claim 1 wherein the base comprises a first housing and a second housing, the first housing and the second housing being movable relative to one another, and a switch actuated by movement of the first housing and the second housing to control power to the plurality of LED assemblies through the electrical path.

17 . A lamp comprising:
a base comprising at least one pin connector; an elongated heat sink extending from the base, the heat sink defining a mounting surface extending along a longitudinal axis of the lamp; at least one LED assembly comprising at least one LED mounted on the mounting surface, the at least one LED being electrically coupled to the at least one pin connector through an electrical path to emit light when energized through the electrical path, the at least one LED assembly operating at between 16 and 19 Watts and producing at least 900 lumens; an optically transmissive enclosure surrounding at least a portion of the heat sink.

18 . The lamp of claim 17 wherein the lamp emits light with a CRI greater than or equal to approximately 90.

19 . The lamp of claim 17 wherein the lamp emits light with a CCT in a range of between approximately 2700 and 4000K.

20 . The lamp of claim 17 comprising a plurality of LEDs that extend from adjacent the base to adjacent a distal end of the heat sink such that light is emitted over substantially the length of the heat sink.

21 . The lamp of claim 16 wherein the enclosure comprises apertures that allow air to circulate across the heat sink.

22 . 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; an interconnect comprising a first engagement member for engaging the enclosure, a second engagement member for securing the lamp electronics board to the interconnect and a first electrical contact electrically coupled to the LED board and second electrical contact electrically coupled to the lamp electronics board.

22 . An interconnect for a LED lamp comprising:
a first engagement member configured to engage an enclosure; a second engagement member configured to secure a lamp electronics board to the interconnect; and a first electrical contact configured to electrically couple to the LED board and second electrical contact configured to electrically coupled to the lamp electronics board.

Assignees

• Cree Inc

Inventors

• Demuynck Randy

Classifications

• F21K9/1355 Primary

  Mechanical Engineering · mapped topic

• F21V29/77

  with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section · CPC title

• F21V17/08

  onto the supporting or suspending arrangements of the lighting device, e.g. power cords, standards · CPC title

• F21Y2101/02

  Mechanical Engineering · mapped topic

• F21V23/06

  the elements being coupling devices {, e.g. connectors} · CPC title