LED luminaire with improved thermal management and novel LED interconnecting architecture

Patent metadata

Field	Value
Publication number	US-9435492-B2
Application number	US-201414206825-A
Country	US
Kind code	B2
Filing date	Mar 12, 2014
Priority date	Mar 15, 2013
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

A LED lamp includes an optically transmissive enclosure and a base connected to the enclosure. LEDs are mounted on a ribbon for emitting light when energized though an electrical path from the base. The mounting ribbon for the LEDs has a surface that is positioned adjacent an interior surface of the enclosure for transmitting heat from the plurality of LEDs to the enclosure.

First claim

The invention claimed is:

1. A LED lamp comprising:
an enclosure comprising an optically transmissive portion having an interior surface and defining a completely enclosed interior space;
a base connected to the enclosure;
a plurality of LEDs mounted on a thermally conductive ribbon for emitting light when energized through an electrical path from the base, wherein the ribbon is in the electrical path to the plurality of LEDs, the plurality of LEDs being disposed near the interior surface of the optically transmissive portion of the enclosure and positioned to direct light primarily inwardly toward a center of the enclosure, wherein the plurality of LEDs are disposed about the periphery of the enclosure, the ribbon having a surface that is disposed adjacent to the interior surface of the optically transmissive portion of the enclosure for transmitting heat from the plurality of LEDs to the enclosure.

2. The lamp of claim 1 wherein the base comprises an Edison base.

3. The lamp of claim 1 further comprising a plurality of ribbons each of the plurality of ribbons supporting a plurality of LEDs and being in the electrical path to the plurality of LEDs.

4. The lamp of claim 1 wherein the plurality of LEDs are mounted on a mounting surface of the ribbon, and the surface of the ribbon and the mounting surface are part of the same physical component.

5. The lamp of claim 1 wherein the plurality of LEDs are mounted directly to the ribbon.

6. The lamp of claim 1 wherein the outer dimensions of the lamp fall within the ANSI standards for an A series bulb.

7. The lamp of claim 1 wherein electrical conductors for providing current to the plurality of LEDs are formed on the ribbon.

8. The lamp of claim 1 wherein the ribbon comprises one of aluminum board, flexible PCB, lead frame, PCB and MCPCB.

9. The lamp of claim 1 wherein the ribbon is formed into a three-dimensional shape that comprises portions that are shaped to conform to the shape of the interior surface of the enclosure.

10. The lamp of claim 9 wherein the ribbon is bent along score lines.

11. The lamp of claim 1 wherein the plurality of LEDs are oriented at different angles relative to a longitudinal axis of the lamp.

12. The lamp of claim 1 wherein a power supply is located in the base.

13. The lamp of claim 1 further comprising a tower that extends into the enclosure for supporting a second plurality of LEDs.

14. The lamp of claim 13 wherein the tower forms part of a heat sink for dissipating heat from the second plurality of LEDs.

15. The lamp of claim 14 wherein the heat sink extends at least partially outside of the lamp.

16. The lamp of claim 15 wherein the heat sink is thermally coupled to the plurality of LEDs for dissipating heat from the plurality of LEDs.

17. The lamp of claim 1 further comprising a heat sink for supporting a second plurality of LEDs adjacent an opening into the enclosure.

18. A LED lamp comprising:
an enclosure that is at least partially optically transmissive and comprises an interior surface having a shape;
a base connected to the enclosure and a tower that extends from the base into the center of the enclosure;
a plurality of LEDs mounted on a first surface of a thermally conductive ribbon for emitting light when energized through an electrical path from the base, the ribbon having a second surface that is disposed adjacent to the interior surface of the enclosure for transmitting heat from the plurality of LEDs to the enclosure wherein the second surface conforms to the shape of the interior surface over the length of the ribbon and at least one LED mounted on the tower where the at least one LED is spaced internally of the conductive ribbon.

Assignees

• Cree Inc

Inventors

• Heikman Sten

Classifications

• F21K9/90

  Methods of manufacture · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V29/506

  of globes, bowls or cover glasses · CPC title

• F21Y2107/30

  on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section · CPC title

• F21Y2103/33

  annular · CPC title