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:
May. 05, 2009
Filed:
May. 06, 2005
Keishi Nishikubo, Tokyo, JP;
Kozo Takahashi, Tokyo, JP;
Keishi Nishikubo, Tokyo, JP;
Kozo Takahashi, Tokyo, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An auxiliary capacitance electrode driving circuit outputs an auxiliary capacitance electrode driving signal alternating between high potential and low potential once every horizontal scanning period. A common electrode driving circuit drives a common electrode such that it also alternates between high potential and low potential once every horizontal scanning period. In an auxiliary capacitance potential setting circuit, the anode of a diode is connected to an auxiliary capacitance electrode driving signal line and the cathode of the diode is connected to a ground conductor. A node between the anode of the diode and the auxiliary capacitance electrode driving signal line is connected via a capacitor to the auxiliary capacitance electrode driving circuit. Thus, the auxiliary capacitance potential setting circuit functions as a clamping circuit for setting an upper limit of the potential of the auxiliary capacitance electrode.