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:
Mar. 23, 2021
Filed:
Aug. 26, 2019
Seiko Epson Corporation, Tokyo, JP;
Hidefumi Sakata, Kamiina-gun, JP;
Junichi Suzuki, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A light source apparatus includes a light source that outputs excitation light, a first wavelength converter containing a first phosphor and converts excitation light into first fluorescence having a first wavelength band, a second wavelength converter containing a second phosphor and converts excitation light into second fluorescence having a second wavelength band, a reflector reflecting second fluorescence guided in second wavelength converter, and a light guide guiding second fluorescence having exited out of second wavelength converter to first wavelength converter. A first side surface of first wavelength converter faces second side surface of second wavelength converter. The reflector is provided at the second wavelength converter's fourth end surface. The light guide has a reflection surface that faces the third end surface of the second wavelength converter and second end surface of the first wavelength converter. The first and second fluorescence exit via the first end surface of first wavelength converter.