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:
Jul. 02, 2019
Filed:
Nov. 14, 2016
Applicant:
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/1343 (2006.01); G02F 1/133 (2006.01); G02F 1/1333 (2006.01); G09G 3/36 (2006.01); G02F 1/1335 (2006.01); G02F 1/1337 (2006.01); G02F 1/1339 (2006.01); G02F 1/1362 (2006.01); G02F 1/1368 (2006.01);
U.S. Cl.
CPC ...
G02F 1/13306 (2013.01); G02F 1/133345 (2013.01); G02F 1/134363 (2013.01); G09G 3/3677 (2013.01); G09G 3/3688 (2013.01); G02F 1/1337 (2013.01); G02F 1/1368 (2013.01); G02F 1/13394 (2013.01); G02F 1/133512 (2013.01); G02F 1/133514 (2013.01); G02F 1/136286 (2013.01); G02F 2001/13629 (2013.01); G02F 2001/133302 (2013.01); G02F 2001/134372 (2013.01); G02F 2001/134381 (2013.01); G02F 2001/136295 (2013.01); G02F 2201/121 (2013.01); G02F 2201/123 (2013.01); G09G 3/3614 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0204 (2013.01); G09G 2320/0247 (2013.01);
Abstract
A flicker of an FFS liquid crystal display device that is driven at a low refresh rate is reduced. In an FFS liquid crystal display, a pixel electrode and a first common electrode included in a liquid crystal element are formed on an element substrate side, and a second common electrode is formed on another substrate (counter substrate) side. By making the first and second common electrodes have the same potential, generation of a residual DC voltage can be suppressed in a pixel. Thus, even when a refresh rate is lowered, change in transmittance of a pixel can be suppressed in a data retention period, so that a flicker can be reduced.