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:
Nov. 22, 2011
Filed:
Apr. 24, 2007
Akihiro Shoraku, Suzuka, JP;
Toshihide Tsubata, Tsu, JP;
Akihiro Shoraku, Suzuka, JP;
Toshihide Tsubata, Tsu, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Each pixel region includes two subpixel regions, in which different voltages are applied to a liquid crystal layer with respect to a signal voltage supplied from a source bus line by way of TFTs. A first substrate includes a first electrode provided for the two subpixel regions. A second substrate includes a second electrode that faces the first electrode with a vertical alignment liquid crystal layer interposed. A liquid crystal capacitor is provided for each of these subpixel regions. Each subpixel region includes at least one liquid crystal domain that produces a dark area, which looks darker than a gray scale tone being presented for a viewer located in front of the device, inside of, and substantially parallel to, an edge portion of the first electrode. At least a part of the edge portion of the first electrode is arranged so as to overlap with a gate bus line and selectively shield at least a part of the dark area. Two TFTs associated with the two subpixel regions have substantially equal drain-gate capacitances Cgd, thus providing a VA mode liquid crystal display device that achieves good display quality.