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. 10, 2020
Filed:
Mar. 26, 2019
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/20 (2006.01); G02B 5/02 (2006.01); G03B 21/00 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G03B 21/204 (2013.01); G02B 5/0284 (2013.01); G03B 21/006 (2013.01); G03B 21/208 (2013.01); G03B 21/2066 (2013.01); G03B 21/2073 (2013.01); H04N 9/3161 (2013.01);
Abstract
A light source device according to the invention includes a light source configured to emit blue light having a wavelength band of 37 nm or less and a diffusion element configured to diffuse the light emitted from the light source. The diffusion element includes a base material that has an uneven structure and is composed of a metal, a reflection film that is provided along the uneven structure and is composed of aluminum, and a dielectric multilayer film provided on the reflection film.