Retrofittable LED module with heat spreader

• US 9,599,298 B2
• Filed: 04/20/2015
• Issued: 03/21/2017
• Est. Priority Date: 11/11/2010
• Status: Active Grant

• Current Assignee: Bridgelux Incorporated
• Original Assignee: Bridgelux Incorporated
• Inventors: Farmer, Todd
• Primary Examiner(s): Mai, Anh
• Assistant Examiner(s): LEE, NATHANIEL J.
• Application Number:
  US14/691,505
• Publication Number:
  US 20150226393A1
• Time in Patent Office: 701 Days
• US Class Current: 1/1
• 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 method for retrofitting a street light, the method comprising:

providing a street light head configured for housing a reflector and non solid state light emitting device;

receiving, in the street light head, a mounting carriage as a replacement for the reflector and non solid state light emitting device, the mounting carriage thermally coupled to a heat spreader and configured to accept one or more solid state light emitting devices; and

providing spring bolts for mounting the heat spreader to the street light head, wherein the spring bolts bias to deform the heat spreader to conform substantially to an inner shape of the street light head.

2. The method of claim 1, wherein

the mounting carriage comprises at least one hole aligned with at least one reflector mounting point in the street light head.

3. The method of claim 2, further comprising inserting at least one of the spring bolts into the at least one hole aligned with the at least one reflector mounting point in the street light head to install the mounting carriage in the street light head.

4. The method of claim 1, wherein the mounting carriage comprises two sets of holes, and wherein:

the heat spreader is mounted to the street light head using the first set holes, such that the heat spreader is thermally coupled to the street light head, and

the one or more solid state light emitting devices is mounted to the heat spreader using the second set of holes.

5. The method of claim 4, further comprising inserting the spring bolts in the first set of holes to mount the heat spreader to the street light head.

6. A method for retrofitting a street light, the method comprising:

removing, from a street light head, a reflector and non-solid state light emitting device;

installing, in the street light head, a mounting carriage to replace the reflector and the non-solid state light emitting device, the mounting carriage thermally coupled to a heat spreader and configured to accept one or more solid state light emitting devices; and

inserting spring bolts for mounting the heat spreader to the street light head, wherein the spring bolts bias to deform the heat spreader to conform substantially to an inner shape of the street light head.

7. The method of claim 6, wherein the mounting carriage comprises two sets of holes, and wherein:

the heat spreader is mounted to the street light head using the first set holes, such that the heat spreader is thermally coupled to the street light head, and

the one or more solid state light emitting devices is mounted to the heat spreader using the second set of holes.

8. The method of claim 7, further comprising inserting the spring bolts in the first set of holes to mount the heat spreader to the street light head.