Transparent heat spreader for LEDs
AssigneeBridgelux, Inc.
InventorWei Shi
Life of this patent
Estimating the term…
Abstract
A heat spreader for an LED can include a thermally conductive and optically transparent member. The bottom side of the heat spreader can be configured to attach to a light emitting side of the LED. The top and/or bottom surface of the heat spreader can have a phosphor layer formed thereon. The heat spreader can be configured to conduct heat from the LED to a package. The heat spreader can be configured to conduct heat from the phosphors to the package. By facilitating the removal of heat from the LED and phosphors, more current can be used to drive the LED. The use of more current facilitates the construction of a brighter LED, which can be used in applications such as flashlights, displays, and general illumination. By facilitating the removal of heat from the phosphors, desired colors can be better provided.
Claims4
An LED assembly comprising:
- a substrate;
- a least one LED die disposed on the substrate;
- a thermally conductive and optically transparent heat spreader directly attached to the substrate, wherein
- the attachment creates a heat conducting path between the heat spreader and the substrate;
- and
- the at least one LED die is disposed therebetween and the light emitting surface of the least one LED die faces the heat spreader thus light from the at least one LED die passes thought the thermally conductive and optically transparent heat spreader.
A LED assembly comprising:
- a substrate;
- at least one LED die attached to the substrate;
- a standoff attached to the substrate;
- a thermally conductive and optically transparent heat spreader attached to the standoff;
- wherein
- the least one LED die is disposed therebetween and the light emitting surface of the least one LED die faces the heat spreader thus light from the at least one LED die passes through the thermally conductive and optically transparent heat spreader;
- and
- the attachment creates a heat conducting path among the least one LED die the thermally conductive and optically transparent member, the standoff, and the substrate.
Dependencies are inferred from the claim text.