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:
Aug. 29, 2006
Filed:
Feb. 04, 2003
Kouji Kumada, Tenri, JP;
Takashige Ohta, Yamatokoriyama, JP;
Haruhito Kagawa, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a signal line drive circuit of an active-matrix type liquid-crystal display which is a voltage-controlled type display with a capacitive load, n selector switches (ton) are provided between buffer circuits (ton) to which voltages responsive to an image to be displayed are inputted from reference voltage selection circuits (ton), and output terminals (Tto Tn) to which are connected image signal lines. These selector switches (ton), based on a shorting control signal (Csh) that is at a high level when the polarity is reversed to perform AC drive of the liquid-crystal panel, switch the output signals (OUTto OUTn of the image signal line drive circuit between the output signals of the buffer circuits (ton) and the common electrode signal (Vcom). By doing this, each of the image signal lines is, for a prescribed time only when the polarity is reversed, separated from the buffer circuits (ton) and shorted to the common electrode. This configuration reduces the power consumption of the signal line drive circuit