H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 33/12 (2006.01) H01L 33/00 (2006.01)
Patent
CA 2481364
The present invention is directed to a light source having a planar main surface capable of emitting a white light which comprises a blue LED, an optical guide plate having a planar main surface and an edge face getting injection of the light from said blue LED, and a coating material of transparent resin or glass containing fluorescent materials positioned between said blue LED and said optical guide plate, whereby the fluorescent materials can be exited by absorption of a part of the blue light from the blue LED to emit fluorescence light and the fluorescence light can be mixed with a remaining part of the blue light to make a white light in said optical guide plate. The light source of the present invention is useful in a white light emitting diode which is subject to less deterioration of emission characteristic even when used with high luminance for a long period of time.
Moriguchi Toshio
Noguchi Yasunobu
Sakano Kensho
Shimizu Yoshinori
Kirby Eades Gale Baker
Nichia Chemical Industries Ltd.
Nichia Corporation
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