White-light led with dielectric omni-directional reflectors
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United States of America Patent
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Dec 21, 2004
Grant Date -
Jun 24, 2004
app pub date -
Mar 25, 2003
filing date -
Dec 20, 2002
priority date (Note) -
Expired
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Abstract
A white-light LED with omni-directional reflectors includes an LED chip for emitting white-light. A light transmitting material surrounding the LED and phosphor grains is dispersed in order to excite fluorescence via emission of LED. Two omni-directional reflectors are implemented on the top and/or bottom of the LED symmetrically surrounding the light transmitting material and the LED chip. The light from the LED was reflected omni-directionally, via the dielectric omni-directional reflectors, to increasing the efficiency and/or spectral characteristics and uniformity of the visible light emission.
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