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:
Sep. 16, 2003
Filed:
May. 01, 2001
Shigeyuki Harada, Neyagawa, JP;
Atsushi Kiyohara, Yamatokoriyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A data side driving IC incorporates pull-up elements and pull-down elements to be applied with modulating voltages of +½VM and −½VM, respectively. A scanning side driving IC incorporates pull-up elements to be applied with a positive write voltage of +VW from a positive voltage supply circuit, and pull-down elements to be applied with a negative write voltage of −VW from a negative voltage supply circuit. Each data electrode is driven by a positive voltage of +½VM or a negative voltage of −½VM. Each scanning electrode is controlled so that it is applied with a positive write voltage of +VW or a negative write voltage of −VW or it assumes a ground potential or a floating potential. Since the data electrodes and the scanning electrodes can be driven with high symmetry of positive and negative polarities, the long-term reliability can be enhanced, while at the same time the peripheral circuitry can be simplified.