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:
Jul. 22, 2025
Filed:
Aug. 07, 2020
Tamura Corporation, Tokyo, JP;
National Institute for Materials Science, Ibaraki, JP;
Yusuke Arai, Tokyo, JP;
Hiroyuki Sawano, Tokyo, JP;
Daisuke Inomata, Tokyo, JP;
Yoshihiro Yamashita, Tokyo, JP;
Rikiya Suzuki, Saitama, 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 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.