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. 08, 2020
Filed:
Jul. 31, 2018
Seiko Epson Corporation, Tokyo, JP;
Kunihiko Takagi, Okaya, JP;
Kunihiko Yano, Shiojiri, JP;
Tomohiro Yokoo, Matsumoto, JP;
Wataru Yasumatsu, Azumino, JP;
Tetsuo Shimizu, Matsumoto, JP;
Shinichi Yotsuya, Chino, JP;
Koya Shiratori, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A wavelength conversion element includes a wavelength conversion layer which has a first face on which an excitation light is incident and a second face facing the first face, a first layer which is provided facing the second face and contains a first inorganic oxide, a second layer which is provided facing the first layer and contains a first metal or a second inorganic oxide that is different from the first inorganic oxide, and a third layer which is provided facing the second layer, contains either silver or aluminum, and reflects the excitation light or a light obtained by wavelength conversion of the excitation light by the wavelength conversion layer.