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Light emitting diode light source

a light source and diode technology, applied in the field of light sources, can solve the problems of limited use of led light sources as illumination sources, generally unsatisfactory, and led's typically generate significant amounts of heat, and achieve the effect of improving heat transfer to the medium

Inactive Publication Date: 2005-11-24
OPTOLUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution allows for the use of LEDs as a high-light-output general lighting source by effectively managing heat, preventing degradation and enabling the use of LEDs in various lighting applications beyond signaling.

Problems solved by technology

Recent attempts to provide LED light sources as sources of illumination have been few, and generally unsatisfactory from a general lighting standpoint.
One problem that has limited the use of LED's to specialty signaling and limited general illumination sources is that LED's typically generate significant amounts of heat.
The heat is such that unless the heat is dissipated, the LED internal temperature will rise causing degradation or destruction of the LED.

Method used

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Examples

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Embodiment Construction

[0030] A light source in accordance with the principles of the invention may be used as a decorative lighting element or may be utilized as a general illumination device. As shown in FIG. 1, a light source 100 in accordance with the invention includes an elongate thermally conductive member or heat sink 101. Elongate heat sink 101 is formed of a material that provides excellent thermal conductivity. Elongate heat sink 101 in the illustrative embodiment of the invention is a tubular aluminum extrusion. To improve the heat dissipative properties of light source 100, elongate heat sink 101 is configured to provide convective heat dissipation and cooling. As more clearly seen in FIG. 2, tubular heat sink 101 is hollow and has an interior cavity 103 that includes one or more surface discontinuities or heat dissipating protrusions 105. In the illustrative embodiment the surface discontinuities or heat dissipating protrusions 105 are triangular shaped fins, but may take on other shapes. In...

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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 thermally conductive portions coupled together. At least one light emitting diode is mounted on an outer surface of the elongate member. The elongate member is thermally conductive and is utilized to cool the light emitting diode by transferring heat to fluid contained by said elongate member.

Description

RELATED APPLICATIONS [0001] This application is a continuation of my co-pending application Ser. No. 10 / 430,696 filed May 05, 2003 which is a continuation-in-part of my co-pending application Ser. No. 10 / 156,810 filed May 29, 2002, now U.S. Pat. No. 6,573,536.FIELD OF THE INVENTION [0002] This invention pertains to lighting sources, in general, and to a lighting source that utilizes Light Emitting Diodes (LED's), in particular. BACKGROUND OF THE INVENTION [0003] LED's have many advantages as light sources. However, in the past LED's have found application only as specialized light sources such as for vehicle brake lights, and other vehicle related lighting, and recently as flashlights. In these prior applications, the LED's are typically mounted in a planar fashion in a single plane that is disposed so as to be perpendicular to the viewing area. Typically the LED planar array is not used to provide illumination, but to provide signaling. [0004] Recent attempts to provide LED light s...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F21K99/00F21V19/00F21V29/02F21Y101/02H01L29/18H01L33/00
CPCF21K9/00F21V29/83F21S4/008F21S48/325F21S48/328F21V19/001F21V29/00F21V29/004F21V29/02F21V29/30F21Y2101/02F21Y2111/005F21K9/30F21Y2103/003F21V29/40F21V29/402F21V29/54F21V29/74F21V29/75F21V29/777F21S4/005F21S4/22F21S4/28F21K9/20F21Y2103/10F21Y2115/10F21Y2107/30
Inventor DRY, JOEL M.
Owner OPTOLUM