Wavelength conversion member including phosphor
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United States of America Patent
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Jul 30, 2019
Grant Date -
Oct 26, 2017
app pub date -
Mar 24, 2017
filing date -
Apr 22, 2016
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Abstract
A wavelength conversion member comprises: a substrate; and a wavelength conversion layer. The wavelength conversion layer contains a first phosphor and a second phosphor. The second phosphor has a higher thermal conductivity than the first phosphor. In the wavelength conversion layer, a volume of the second phosphor is larger than a volume of the first phosphor. The wavelength conversion layer includes a first portion and a second portion. The first portion is located closer to the substrate than the second portion, and is in direct contact with the second portion. Thicknesses of the first portion and the second portion are equal to each other. A volume V11 of the first phosphor in the first portion, a volume V12 of the second phosphor in the first portion, a volume V21 of the first phosphor in the second portion, and a volume V22 of the second phosphor in the second portion satisfy V11/V12
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Address
# of filed Patents
Total Citations
Nagasaki, Yoshihisa
Osaka, JP
44
194
Ohbayashi, Takashi
Osaka, JP
23
139
Okuyama, Kojiro
Nara, JP
61
239
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