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. 19, 2006
Filed:
Jul. 15, 1999
Hyun Chang Lee, Kumi-shi, KR;
Won Gyun Youn, Daegukwangyeok-shi, KR;
Hyun Chang Lee, Kumi-shi, KR;
Won Gyun Youn, Daegukwangyeok-shi, KR;
LG.Philips LCD Co., Ltd., Seoul, KR;
Abstract
A residual image eliminating apparatus and method for a liquid crystal display device is adaptive for eliminating residual images emerging on a screen after power-off due to electric charges accumulated in pixel cells. In the apparatus, upon power-on, a first voltage level for turning off thin film transistors is applied to gate lines. Upon power-off, a higher level voltage than a ground voltage is applied to the gate lines. At this time, a voltage at the gate line is raised into a voltage level capable of opening a channel of the thin film transistor, thereby discharging an electric charge charged in a pixel. As a result, residual images are rapidly eliminated from the liquid crystal panel upon power-off.