PHOSPHOR MIXTURE HAVING OPTIMIZED COLOR RENDERING PROPERTIES AND EMISSION INTENSITY OF EMITTED LIGHT IN VISIBLE REGION
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United States of America Patent
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Issued Date -
Apr 16, 2015
app pub date -
May 22, 2013
filing date -
May 22, 2012
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Abstract
A phosphor mixture comprising at least two phosphors A, B which give an emission spectrum having the maximum emission peak in the visible region, in which a wavelength of the maximum emission peak of the phosphor A differs from that of the maximum emission peak of the phosphor B by not more than 50 nm, and in which the maximum emission peak of the phosphor A has an emission intensity less than that of the phosphor B and the maximum emission peak of the phosphor A shows a half-width more than a half-width of that of the phosphor B gives an light emission having the maximum emission peak whose emission intensity is higher than that of the phosphor A and whose half-width is broader than that of the phosphor B.
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