Retrofittable LED module with heat spreader

• US 9,033,558 B2
• Filed: 09/08/2011
• Issued: 05/19/2015
• Est. Priority Date: 11/11/2010
• Status: Active Grant

• Current Assignee: Bridgelux Incorporated
• Original Assignee: Bridgelux Incorporated
• Inventors: Farmer, Todd
• Primary Examiner(s): Guharay, Karabi
• Assistant Examiner(s): LEE, NATHANIEL J.
• Application Number:
  US13/228,220
• Publication Number:
  US 20120092871A1
• Time in Patent Office: 1,349 Days
• Field of Search: 36221701-21717, 362362-375
• US Class Current: 362/373
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21S 8/088 with lighting device mounted on top of the standard, e.g. for pedestrian zones
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 21/24 Lazy-tongs
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10T 29/49716 Converting

Abstract

A light source includes one or more solid state light emitting devices, a heat spreader thermally coupled to the one or more light emitting devices, and a mounting carriage configured to mount the one or more solid state light emitting devices in a lighting fixture light and thermally couple the heat spreader to the lighting fixture.

Claims

1. A light source, comprising:

a street light head comprising an inner surface, the street light head comprising;

one or more solid state light emitting devices;

a mounting carriage comprising a heat spreader that is thermally coupled to the one or more light emitting devices, wherein;

the mounting carriage is configured to accept the one or more solid state light emitting devices in the street light head, the mounting carriage further configured to thermally couple the heat spreader to the street light, and

the heat spreader comprises a first set of one or more holes for mounting the one or more solid state light emitting devices to the heat spreader and a second set of one or more holes for mounting the heat spreader to the street light head, and wherein the heat spreader comprises a flexibly deformable material configured to substantially conform the heat spreader to the inner shape of the street light head.

2. The light source of claim 1 wherein the mounting carriage is further configured to thermally couple the heat spreader by pressing the heat spreader into thermal contact with the street light head.

3. The light source of claim 2 wherein the mounting carriage further comprises one or more spring bolts, and wherein the mounting carriage is further configured to press the heat spreader into thermal contact with the street light head via the spring bolts.

4. The light source of claim 1 wherein the second set of one or more holes are configured to be aligned with one or more reflector mounting holes in the street light head.

5. The light source of claim 1 wherein the second set of one or more holes are oriented to mount the one or more solid state emitting devices in any one of a plurality of different lighting fixtures.

6. The light source in claim 1 wherein the second set of one or more holes are oriented to choose a light direction from a plurality of directions.

7. The light source of claim 1 wherein the one or more solid state emitting devices comprise a plurality of solid state light emitting devices, and wherein the light source further comprises a phosphor encapsulating the solid state light emitting devices.

8. A light source, comprising:

one or more solid state light emitting devices;

a heat spreader; and

a mounting carriage configured to support the one or more solid state light emitting devices in thermal contact with heat spreader, wherein the mounting carriage is further configured to attach to a head of a lighting fixture, the mounting carriage further configured to provide thermal coupling between the one or more solid state light emitting devices and the lighting fixture, the mounting carriage accepting the at least one or more solid state light emitting devices, and

wherein the heat spreader comprises a first set of one or more holes for mounting the one or more solid state light emitting devices to the heat spreader and a second set of one or more holes for mounting the heat spreader to the head, and wherein the heat spreader comprises a flexibly deformable material configured to substantially conform the heat spreader to an inner shape of the head of the lighting fixture.

9. The light source of claim 8 wherein the mounting carriage is further configured to provide thermal coupling between the one or more solid state light emitting devices and the lighting fixture by pressing the heat spreader into thermal contact with the lighting fixture.

10. The light source of claim 9 wherein the mounting carriage comprises one or more spring bolts, and wherein the mounting carriage is further configured to press the heat spreader into thermal contact with the lighting fixture via the spring bolts.

11. The light source of claim 8 wherein the second set of one or more holes are configured to be aligned with one or more reflector mounting holes in the lighting fixture.

12. The light source of claim 8 wherein the second set of one or more holes are oriented to mount the carriage to any one of a plurality of different lighting fixtures.

13. The light source of claim 8 wherein the one or more solid state emitting devices comprise a plurality of solid state light emitting devices, and wherein the light source further comprises a phosphor encapsulating the solid state light emitting devices.

14. A light source, comprising:

one or more solid state light emitting devices;

a heat spreader attached to the one or more light emitting devices; and

a mounting carriage configured to support the one or more solid state light emitting devices and the heat spreader, wherein the mounting carriage is further configured to be attached to a head of a lighting fixture with the heat spreader being pressed into contact with the conventional lighting fixture, the mounting carriage accepting the at least one or more solid state light emitting devices, and

wherein the heat spreader comprises a first set of one or more or holes for mounting the one or more solid state light emitting devices to the heat spreader and a second set of one or more holes for mounting the heat spreader to the head, and wherein the heat spreader comprises a flexibly deformable material configured to substantially conform the heat spreader to an inner shape of the head of the light fixture.

15. The light source of claim 14 wherein the mounting carriage comprises one or more spring bolts, and wherein the mounting carriage is further configured to press the heat spreader into contact with the lighting fixture via the spring bolts.

16. The light source of claim 14 wherein the second set of one or more holes are configured to be aligned with one or more reflector mounting holes in the conventional lighting fixture.

17. The light source of claim 14 wherein the second set of one or more holes are oriented to mount the carriage to any one of a plurality of different lighting fixtures.

18. The light source of claim 14 wherein the one or more solid state emitting devices comprise a plurality of solid state light emitting devices, and wherein the light source further comprises a phosphor encapsulating the solid state light emitting devices.