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:
Dec. 10, 2019
Filed:
May. 23, 2018
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Yusuke Kudo, Shiojiri, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 21/14 (2006.01); G03B 21/14 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G03B 21/142 (2013.01); H04N 9/317 (2013.01); H04N 9/3194 (2013.01);
Abstract
A projector includes a drive section adapted to move a projection lens, a projection section adapted to project image light through the projection lens, and a determination section adapted to determine whether or not the projection lens has been replaced based on a first position as a position of the projection lens at a first time point at which power supply to the projector is stopped, and a second position as a position of the projection lens at a second time point at which the power supply is started after the first time point.