Patent ID: 7982225
Filing Date: 2011-07-19
Classification: F21K,F21V,F21Y,F28D,F28F,H01L

Abstract:
1. A heat dissipation device adapted for removing heat from LED chips, comprising: a heat sink comprising a base plate which defines a first surface and a second surface opposite to the first surface, and a plurality of fins formed on the second surface of the base plate; and a plurality of substrates of unidirectional heat transfer being attached to the first surface of the heat sink, each of the substrates defining a first wall on which the LED chips are mounted and a second wall coupled to the heat sink, the substrates only transferring heat from the first wall to the second wall and restricting heat transfer in a reversed direction; wherein when the LED chips generate heat, the heat is transferred to the fins via the unidirectional substrates to lower temperature of the LED chips; wherein each of the substrates is a plate-shaped vapor chamber and provided with a capillary wick therein; and wherein the capillary wick in the each of the substrates is a layer of sintered metal/ceramic powders only formed on an inner side of the first wall and away from the second wall.