US 6,452,217 B1Granted

High power LED lamp structure using phase change cooling enhancements for LED lighting products

AssigneeGeneral Electric Company

InventorsRobert J. Wojnarowski, William P. Minnear

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Abstract

High power LED lamps for use in lighting products, such as flashlights and the like, are formed of a plurality of LED die arranged in a multi-dimensional array, each of the LED die having a gallium nitride semiconductor layer and phosphor material for creation of white light. Each of the LED die emits light from the top, bottom and sides of the die and is arranged on the multi-dimensional array so that the emitted light from each of the die does not contact another die. A reflector gathers and focuses the light from each of the die to approximate a high power LED lamp. A thermally conducting, electrically insulating material or phase change material is incorporated into the lamp to act as a source of heat removal.

Claims18

Dependent claims

An LED lamp comprising:

a plurality of LED die arranged in a multi-dimensional array, each of the LED die having a transparent substrate and a semiconductor material deposited on a surface of the substrate, each of the LED die emitting light in a plurality of directions including from the sides of the die, each of the LED die arranged on the multi-dimensional array so that the emitted light from the sides of each of the LED die does not contact another of the LED die;
and
at least one reflecting surface arranged relative to the plurality of LED die comprising the multi-dimensional array such that the arrangement of the LED die and the at least one reflecting surface cooperate to direct light emitted from the sides of the LED die outward from the LED lamp;
wherein the multi-dimensional array is formed in a three-dimensional trapezoidal shape.

1 more element

Dependencies are inferred from the claim text.