The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2025
Filed:
Sep. 30, 2020
National Institute for Materials Science, Ibaraki, JP;
Daisuke Inomata, Tokyo, JP;
Rikiya Suzuki, Tokyo, JP;
Yusuke Arai, Tokyo, JP;
Yoshihiro Yamashita, Tokyo, JP;
Hiroyuki Sawano, Tokyo, JP;
Kiyoshi Shimamura, Ibaraki, JP;
Encarnacion Antonia Garcia Villora, Ibaraki, JP;
National Institute for Materials Science, Ibaraki, JP;
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.