Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1999-04-28
2000-05-30
Patel, Nimeshkumar D.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313489, H01J 162
Patent
active
060694408
ABSTRACT:
The white light emitting diode comprising a light emitting component using a semiconductor as a light emitting layer and a phosphor which absorbs a part of light emitted by the light emitting component and emits light of wavelength different from that of the absorbed light, wherein the light emitting layer of the light emitting component is a nitride compound semiconductor and the phosphor contains garnet fluorescent material activated with cerium which contains at least one element selected from the group consisting of Y, Lu, Sc, La, Gd and Sm, and at least one element selected from the group consisting of Al, Ga and In and, and is subject to less deterioration of emission characteristic even when used with high luminance for a long period of time.
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Moriguchi Toshio
Noguchi Yasunobu
Sakano Kensho
Shimizu Yoshinori
Nichia Kagaku Kogyo Kabushiki Kaisha
Patel Nimeshkumar D.
Smith Michael J.
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