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:
Oct. 21, 2025
Filed:
Sep. 29, 2022
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Shinsuke Fujikawa, Chino, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/28 (2006.01); G02F 1/13 (2006.01); G02F 1/1333 (2006.01); G09G 3/00 (2006.01); G09G 3/36 (2006.01); G03B 21/00 (2006.01);
U.S. Cl.
CPC ...
G02F 1/1309 (2013.01); G02F 1/133308 (2013.01); G09G 3/006 (2013.01); G09G 3/36 (2013.01); G03B 21/006 (2013.01);
Abstract
A liquid crystal device includes a common electrode as a first electrode, a pixel electrode as a second electrode, a liquid crystal layer to which a drive voltage is applied for one refresh period as a first refresh period, and a measurement circuit that applies an inspection voltage to the liquid crystal layer between the common electrode and the pixel electrode, sets a period that is longer than one refresh period after the application of the inspection voltage is stopped, and measures a voltage between the common electrode and the pixel electrode.