Flat mount for light emitting diode source

• US 20060013000A1
• Filed: 05/09/2005
• Published: 01/19/2006
• Est. Priority Date: 07/16/2004
• Status: Abandoned Application

• Current Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Original Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Inventors: Tucker, Michael, Tessnow, Thomas, Coushaine, Charles
• Application Number:
  US11/124,977
• Publication Number:
  US 20060013000A1
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21V 19/0015 Fastening arrangements intended to retain light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lamp assembly comprising: a side-emitting LED light source, a planar substrate having a first side and a second side, said LED light source being mounted in a center region of said first side, leaving an edge region of the first side extending circumferentially around said LED light source; said substrate having a portion of high thermal conductivity in thermal contact with said LED light source; a reflector having a reflective surface defining a concave cavity with an opening in a direction toward a field to be illuminated and having a through passage extending into said cavity; said LED light source being extended through said passage and having light emitting surfaces facing said reflective surface, said edge region being circumferentially sealed to said reflector, and electrical connections extending through said planar substrate connecting said LED light source to a supply of electrical power.

Claims

1. A lamp assembly comprising:

an LED light source,

a planar substrate having a first side and a second side, the LED being mounted in a center region of the first side, leaving an edge region of the first side extending circumferentially around the LED;

the substrate having portions of high thermal conductivity in thermal contact with the LED;

a reflector having a reflective surface defining a concave cavity open in a direction toward a field to be illuminated, the reflector being formed with a through passage extending to the cavity;

the LED being extended through the passage to face the reflective surface, the edge region circumferentially sealed to the reflector, the substrate otherwise being mechanically coupled to the reflector; and

electrical connections extending through the substrate connecting to the LED to supply electrical power to the LED.

2. The lamp assembly in claim 1, wherein the substrate is glued to the reflector.

3. The lamp assembly in claim 1, wherein the substrate is screwed to the reflector.

4. The lamp assembly in claim 1, wherein the substrate is press fit to a circumferential lip formed on the reflector.

5. The lamp assembly in claim 1, wherein the substrate further supports a circuit providing controlled power to the LED.

6. The lamp assembly in claim 1, further including an electrical socket for receiving electric power for the LED.

7. The lamp assembly in claim 1, further including a cover enclosing the circuit.

8. The lamp assembly in claim 1, wherein at least a portion of the second side of the substrate is exposed to the exterior for heat dissipation from the substrate.

9. The lamp assembly in claim 1, wherein at least a portion of the second side of the substrate is in thermal contact with a heat conductor exposed to the exterior for heat dissipation from the substrate.

10. The lamp assembly in claim 1, wherein the reflector is shallow, having an internal face diameter at least two times as large as the axial depth from the front face plane to the interior passage plane.

11. The lamp assembly in claim 1, wherein the LED is supported on a short axial support having an axial extension less than one fifth of the axial depth from the front face plane to the interior passage plane.