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公开(公告)号：US20220282151A1
公开(公告)日：2022-09-08
申请号：US17633787
申请日：2020-08-07
Inventor： Yusuke ARAI , Hiroyuki SAWANO , Daisuke INOMATA , Yoshihiro YAMASHITA , Rikiya SUZUKI , Kiyoshi SHIMAMURA , Encarnacion Antonia GARCIA VILLORA
Abstract: A wavelength conversion member includes a sintered body of a phosphor. An average diameter of pores in an arbitrary cross section falls within a range of not less than 0.28 μm and not more than 0.98 μm. A ratio of an area of pores to a whole area in an arbitrary cross section falls within a range of not less than 0.04% and not more than 2.7%. An average diameter of grains of the phosphor in an arbitrary cross section falls within a range of not less than 1 μm and not more than 3 μm.
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公开(公告)号：US20230323198A1
公开(公告)日：2023-10-12
申请号：US17766282
申请日：2020-09-30
Inventor： Daisuke INOMATA , Rikiya SUZUKI , Yusuke ARAI , Yoshihiro YAMASHITA , Hiroyuki SAWANO , Kiyoshi SHIMAMURA , Encarnacion Antonia GARCIA VILLORA
CPC classification number: C09K11/02 , G02B26/007 , H01S5/0087 , C09K11/7774
Abstract: A wavelength conversion member includes a support, and a wavelength conversion layer that includes a phosphor particle group and a sealing member to seal the phosphor particle group and that is provided directly or through an other layer on the support. A predetermined region, in which a cross-sectional area rate of the phosphor particle group is not less than 50%, is included in an arbitrary cross section of the wavelength conversion layer taken parallel to a thickness direction thereof. The predetermined region includes a rectangular region with a width of 700 μm and a thickness of 50 μm from a bottom surface of the wavelength conversion layer when a thickness of the wavelength conversion layer is not less than 50 μm, or a rectangular region with a width of 700 μm and a thickness equal to the thickness of the wavelength conversion layer when it is less than 50 μm.
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