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:
Jun. 02, 2020
Filed:
Mar. 27, 2019
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Tetsuo Shimizu, Matsumoto, JP;
Akira Egawa, Shiojiri, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/20 (2006.01); G03B 21/16 (2006.01); H04N 9/31 (2006.01); G03B 21/00 (2006.01);
U.S. Cl.
CPC ...
G03B 21/204 (2013.01); G03B 21/006 (2013.01); G03B 21/16 (2013.01); H04N 9/3158 (2013.01); H04N 9/3161 (2013.01);
Abstract
A wavelength converter to which the invention is applied includes a phosphor that converts the wavelength of blue light to emit fluorescence, a rotating mechanism that rotates the phosphor around an axis of rotation that extends in a light incident direction in which the blue light is incident, and a heat insulating member that is provided between the phosphor and the rotating mechanism in the light incident direction. The phosphor has a coinciding section that coincides with the rotating mechanism when viewed in the light incident direction.