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LED lamp incorporating remote phosphor with heat dissipation features

United States Patent

9,500,325
November 22, 2016
View the Complete Patent at the US Patent & Trademark Office
An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and a remote planar phosphor carrier having at least one conversion material. The phosphor carrier can be remote to the light sources and mounted to the heat sink so that heat from the phosphor carrier spreads into the heat sink. The phosphor carrier can comprise a thermally conductive transparent material and a phosphor layer, with an LED based light source mounted to the heat sink such that light from the light source passes through the phosphor carrier. At least some of the LED light is converted by the phosphor carrier, with some lamp embodiments emitting a white light combination of LED and phosphor light. The phosphor arranged according to the present invention can operate at lower temperature to thereby operate at greater phosphor conversion efficiency and with reduced heat related damage to the phosphor.
Tong; Tao (Oxnard, CA), Letoquin; Ronan (Fremont, CA), Keller; Bernd (Santa Barbara, CA), Tarsa; Eric (Goleta, CA)
CREE, INC. (Durham, NC)
13/ 029,025
20110215701
February 16, 2011
This invention was made with Government support us Department of Energy Contract No. DE-FC26-08NT01577. The Government has certain rights in this invention.