Light-emitting unit
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United States of America Patent
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-
Apr 6, 2004
Grant Date -
Apr 18, 2002
app pub date -
Aug 27, 2001
filing date -
Aug 28, 2000
priority date (Note) -
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Abstract
A light-emitting device with an emission wavelength range of from 360 nm to 550 nm and a fluorescent material made of Ca--Al--Si--O--N oxynitride activated with Eu.sup.2+ are used so that a part of light emitted from the light-emitting device is emitted while the wavelength of the part of light is converted by the fluorescent material.
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