US 6,815,724 B2Granted

Light emitting diode light source

AssigneeOptolum, Inc.

InventorJoel M. Dry

Life of this patent

Estimating the term…

Abstract

A light source that utilizes light emitting diodes that emit white light is disclosed. The diodes are mounted on an elongate member having at least two surfaces upon which the light emitting diodes are mounted. The elongate member is thermally conductive and is utilized to cool the light emitting diodes. In the illustrative embodiment, the elongate member is a tubular member through which a heat transfer medium flows. A cooling or fluid movement device coupled with the elongate thermally conductive member enhances cooling of the light emitting diodes.

Claims20

Dependent claims

A light source comprising:

an elongate thermally conductive member having an outer surface;
a plurality of light emitting diodes (LED's) carried on said elongate member outer surface at least some of said light emitting diodes being disposed in a first plane and others of said light emitting diodes being disposed in a second plane not coextensive with said first plane;
said elongate thermally conductive member being configured to conduct heat away from said light emitting diodes to fluid contained by said elongate thermally conductive member;
temperature sensing apparatus providing signals representative of the temperature of said light emitting diodes;
and
a controller coupled to said LED's and to said temperature sensing apparatus for controlling the temperature of said LED's dependent upon predetermined temperatures.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/430,698Filed 5 May 2003 · continuation in part
Priority: 29 May 2002
Published: US 2003/0230765 A118 Dec 2003
Granted: 9 Nov 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

F21V 29/54
Cooling arrangements: using thermoelectric means, e.g. Peltier elements
F21K 9/20
Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers: light sources comprising…
F21S 4/22
With light sources held by or within elongate supports: flexible or deformable, e.g. into a curved shape
F21S 4/28
With light sources held by or within elongate supports: rigid, e.g. LED bars

Family

Application10/156,810Parent of this continuation-in-part · filed 29 May 2002
US 2003/0230765 A1Pre-grant publication · published 18 Dec 2003
US 6,573,536 B1Parent of this continuation-in-part
US 6,815,724 B2This patent

From the US filing history. Foreign family members aren’t listed.

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Abstract

Facts

Application

10/430,698Filed 5 May 2003 · continuation in part

Priority

29 May 2002

Published

US 2003/0230765 A118 Dec 2003

Granted

9 Nov 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

F21V 29/54
Cooling arrangements: using thermoelectric means, e.g. Peltier elements
F21K 9/20
Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers: light sources comprising…
F21S 4/22
With light sources held by or within elongate supports: flexible or deformable, e.g. into a curved shape
F21S 4/28
With light sources held by or within elongate supports: rigid, e.g. LED bars