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:
Dec. 31, 2002
Filed:
Jul. 08, 1999
Toshihiro Nakamura, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A driving device of a liquid crystal display device includes a liquid crystal panel which is provided with a group of segment electrodes and a group of common electrodes disposed to intersect with the group of segment electrodes and a liquid crystal sandwitched therebetween. The driving device includes a controller which controls a changing period for changing an output level of a segment driving signal which drives the group of segment electrodes in a single scanning period, within a voltage level which is the same polarity with respect to a common driving output which drives the group of common electrodes. The driving device corrects a driving voltage error generated by a change in display data and alternating signal by controlling the changing period. As a result, the driving device improves the display quality of the liquid crystal panel.