DOPED SAPPHIRE AS SUBSTRATE AND LIGHT CONVERTER FOR LIGHT EMITTING DIODE
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United States of America Patent
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Issued Date -
Sep 12, 2013
app pub date -
Mar 4, 2013
filing date -
Mar 6, 2012
priority date (Note) -
Abandoned
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Abstract
Described is a material composition comprising a crystalline sapphire material doped with two or more dopants, wherein when a primary radiation comprising blue light is propagated through the crystalline material at least a portion of the primary radiation is converted into a first secondary radiation and a second secondary radiation that is emitted from the crystalline material, wherein the first secondary radiation comprises green light and the second secondary radiation comprises red light, and wherein the primary radiation, first secondary radiation and second secondary radiation when combined produce white light. Also described are LED devices employing the material composition as a light transmissive substrate.
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