Light emitting diode disc optic with heat sink housing

• US 20060013002A1
• Filed: 09/10/2004
• Published: 01/19/2006
• Est. Priority Date: 07/16/2004
• Status: Active Grant

• Current Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Original Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Inventors: Tucker, Michael, Tessnow, Thomas, Coushaine, Charles M.
• Granted Patent: US 8,297,801 B2
• Time in Patent Office: Days
• US Class Current: 362/308
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: F21S 41/28 Cover glass
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/26 Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
• CPC Class Codes: F21S 43/30 characterised by reflectors
• CPC Class Codes: F21S 45/48 with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 5/045 the lens having discontinuous faces, e.g. Fresnel lenses

Abstract

A lamp (10) has a cup-shaped body (12) with a bottom (14) with a sidewall (16) defining a top (18). The body (12) is thermally conductive. A reflective coating (20) is provided on the inside surface bottom (14) and side wall (16) for reflecting light from a side emitting LED (22) that is mounted on a thermally conductive, electrically insulating coupling (24) and is centered on the bottom (14). A lens (26) for directing light emitted from the LED (22) in a desired direction is provided and preferably is a Fresnel optic. The lens (26) can close the opening (18) or it can be formed as an integral part of bottom (14) or it can be added to the bottom (14). Alternatively, the lens (26) can be solid with the lens elements either external or internal. Electrical connections (28, 30) to the LED extend through the cup-shaped body (14).

Claims

1. A lamp comprising:

a cup-shaped body having a planar bottom with an up-standing, peripheral side wall defining a top;

a reflective coating on an inside surface of said planar bottom and side wall;

a single, side emitting LED mounted on a thermally conductive coupling positioned substantially in the center of said planar bottom;

a lens for directing a beam of light emitted from said LED in a desired direction; and

electrical connections to said LED extending through said cup-shaped body.

2. The lamp of claim 1 wherein said cup-shaped body is thermally conductive to remove heat generated by the operation of said LED from said lamp.

3. The lamp of claim 1 wherein said lens contains a Fresnel optic for spreading said beam of light generated when said LED is operating.

4. The lamp of claim 3 wherein said lens closes said top.

5. The lens of claim 3 wherein said lens is formed on said planar bottom.

6. The lamp of claim 1 wherein said lamp includes circuitry providing controlled power to said LED.

7. The lamp of claim 6 wherein said circuitry is positioned on the exterior of said cup-shaped body.