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:
Nov. 17, 2020
Filed:
Jul. 29, 2019
Seiko Epson Corporation, Tokyo, JP;
Tomoko Akagawa, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A light source device includes a light source section that emits excitation light, a phosphor that emits fluorescence, a light guide having a light incidence surface, a light exit surface and a side surface crossing the light incidence surface and the light exit surface, and configured to propagate light entered an inside of the light guide, a reflective polarization element disposed to be opposed to the light exit surface, and configured to reflect first polarized light with a first polarization direction out of the fluorescence emitted from the light exit surface, and transmit second polarized light with a second polarization direction different from the first polarization direction out of the fluorescence emitted from the light exit surface, and a reflecting member disposed to be opposed to a part of the side surface of the light guide, wherein the phosphor is disposed at a position opposed to the light incidence surface.