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:
Jan. 13, 2004
Filed:
Sep. 06, 2000
Takafumi Kawaguchi, Taki-gun, JP;
Toshihiro Yanagi, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In an active-matrix LCD device, a coupling signal in accordance with a sum of outputs of data signal lines is detected by a detection-use bus line crossing each of the data signal lines. The coupling signal is superimposed via a coupling capacitor on an input signal that serves as a reference, and is inverted and amplified by a inverting-amplifying section, then it is outputted as a common electrode signal. With this, a waveform that corresponds to a sum of the outputs is coupled with the common electrode signal. As a result, the common electrode signal is caused to have an influence that corresponds to a fluctuation of a potential of the common electrode due to outputs of the data signal lines and that is reverse in phase, thereby enabling to prevent horizontal shadow due to the outputs of the data signal lines. Thus, it is possible to realize an active-matrix-type LCD device in which horizontal shadow can be prevented with low power consumption.