FLUORESCENT LAMP AND IMAGING DEVICE USIGN THE SAME
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United States of America Patent
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Issued Date -
Sep 11, 2008
app pub date -
Feb 20, 2008
filing date -
Mar 8, 2007
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Abandoned
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Abstract
In conventional fluorescent lamps and imaging devices using the same, there have been challenges that lighting efficiency should be enhanced and variation in emission colors should be reduced. The present invention has solved these challenges by providing a novel fluorescent lamp. The phosphor layers of the fluorescent lamp is composed of at least two types of phosphors, in which at least the most outer surface is a phosphor layer made of one of the phosphors (the first phosphor); and the rest portion of the phosphor layers, is made of mixed phosphors including a plurality of phosphors having respective emitting colors.
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