White light-emitting lamp for illumination and illuminating device using the same
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United States of America Patent
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Apr 23, 2013
Grant Date -
Sep 23, 2010
app pub date -
Sep 19, 2008
filing date -
Sep 21, 2007
priority date (Note) -
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Abstract
A white light emitting lamp 1 includes a phosphor layer 5 which emits white light by being excited by light emitted from a semiconductor light emitting element 2. A transparent resin layer 4 is interposed between the semiconductor light emitting element 2 and the phosphor layer 5. The phosphor layer 5 contains, as a green phosphor, a rare earth borate phosphor activated by trivalent cerium and terbium.
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