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:
Jun. 23, 2009
Filed:
Dec. 05, 2006
Kazuhiko Yanagawa, Mobara, JP;
Yasushi Iwakabe, Ooamishirasato, JP;
Yoshiaki Nakayoshi, Ooamishirasato, JP;
Setsuo Kobayashi, Mobara, JP;
Katsumi Kondo, Mito, JP;
Nagatoshi Kurahashi, Mobara, JP;
Kazuhiko Yanagawa, Mobara, JP;
Yasushi Iwakabe, Ooamishirasato, JP;
Yoshiaki Nakayoshi, Ooamishirasato, JP;
Setsuo Kobayashi, Mobara, JP;
Katsumi Kondo, Mito, JP;
Nagatoshi Kurahashi, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A liquid crystal display device can suppress the local temperature elevation of a liquid crystal in the vicinity of drivers. On a liquid-crystal-side surface of one substrate out of substrates which are arranged to face each other in an opposed manner while sandwiching a liquid crystal therebetween, a switching element which is operated in response to scanning signals from a gate signal line, a pixel electrode to which video signals from a drain signal line are supplied via the switching element, and a reference electrode which generates an electric field between the reference electrode and the pixel electrode are mounted on each pixel region of the liquid-crystal-side surface. The video signals from the drain signal line are generated by a driver chip mounted on one substrate. A light transmittivity of the liquid crystal layer is set to take a minimum value when a voltage is not applied between the pixel electrode and the reference electrode. A maximum amplitude of voltage of the video signals is set to a value not more than a voltage necessary for setting a relative transmittivity of the liquid crystal layer to 90%.