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:
Sep. 10, 2012
Filed:
Mar. 22, 2011
Kazuya Ueda, Hyogo-ken, JP;
Hidefumi Yoshida, Nara, JP;
Yuichi Inoue, Kanagawa, JP;
Yoshio Koike, Atsugi, JP;
Kazuya Ueda, Hyogo-ken, JP;
Hidefumi Yoshida, Nara, JP;
Yuichi Inoue, Kanagawa, JP;
Yoshio Koike, Atsugi, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The invention relates to a liquid crystal display device used for a display part of an information equipment and a driving method thereof, and has an object to provide a liquid crystal display device in which excellent viewing angle characteristics can be obtained and a driving method thereof. When a relatively high level data voltage is applied to a gate electrode of a TFT, a driving voltage is applied to a liquid crystal layer for a long time and a white display is realized. When a relatively low level data voltage is applied to the gate electrode of the TFT, the driving voltage is not applied to the liquid crystal layer, and a black display is realized. When an intermediate data voltage between the high level and the low level is applied to the gate electrode of the TFT, the TFT keeps an on state for a time determined by a time constant depending on a capacitance and a resistance. The driving voltage is applied to the liquid crystal layer for the on time. By this, a half tone display is realized according to the ratio of the on time of the TFT in one frame period.