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, 2002
Filed:
Jan. 21, 1999
Masao Karube, Fukaya, JP;
Kazuo Nakamura, Kitamoto, JP;
Masaki Miyatake, Fukaya, JP;
Hoko Hirai, Fukaya, JP;
Akihiko Saitoh, Fukaya, JP;
Yoshiro Aoki, Fukaya, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
Arrangement of connection points of sampling switches to video bus lines within a signal line drive circuit is improved such that connection points of video buses (SVn to SVn ) supplied with positive-polarity video signals relative to a predetermined reference potential and video buses (SVp to SVp ) supplied with negative-polarity video signals to analog switches (SWn to SWn and SWp to SWp ) make substantially symmetric patterns in the extending direction of the video buses. Since the sum of lengths of connection wirings belonging to a switch pair and their total resistance value becomes substantially equal in all switch pairs, the effective vales of shift amounts in signal line potentials are substantially flattened. Therefore, here is provided a drive circuit built-in liquid crystal display device realizing a good imaging quality removing noise such as stripe-shaped imaging defects which may occur when video signals are supplied to analog switches through a plurality of video buses.