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. 22, 2016
Filed:
Feb. 04, 2013
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); F21K 99/00 (2010.01); H05B 33/00 (2006.01); G03B 21/20 (2006.01); H05B 33/10 (2006.01); H05B 33/14 (2006.01);
U.S. Cl.
CPC ...
F21K 9/56 (2013.01); G03B 21/14 (2013.01); G03B 21/204 (2013.01); H05B 33/00 (2013.01); H05B 33/10 (2013.01); H05B 33/14 (2013.01); Y10T 428/269 (2015.01);
Abstract
A wavelength conversion element includes a phosphor layer that includes phosphors and a binder. The thickness of a phosphor region obtained by multiplying the thickness of the phosphor layer by the volume concentration of the phosphor is equal to or larger than 15 μm.