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:
Feb. 28, 2012
Filed:
Jun. 29, 2007
Jin Cheol Hong, Gyeongsangbuk-do, KR;
Soon Dong Cho, Gyeongsangbuk-do, KR;
Boo Han Kim, Chungcheongnam-Do, KR;
Min Gi Kim, Daegu, KR;
Jin Cheol Hong, Gyeongsangbuk-do, KR;
Soon Dong Cho, Gyeongsangbuk-do, KR;
Boo Han Kim, Chungcheongnam-Do, KR;
Min Gi Kim, Daegu, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
A liquid crystal display device and a driving method thereof, which are capable of preventing generation of a residual image upon power-off, are disclosed. The liquid crystal display device includes a power supply unit for outputting a plurality of drive voltages after delaying the drive voltages, a voltage detector for monitoring one of the drive voltages, and outputting a power-off detect signal based on the result of the monitoring, a timing controller for increasing a frequency of a control signal in response to the power-off detect signal, and outputting the frequency-increased control signal, a gate driver for outputting a scan signal in response to the frequency-increased control signal, a data driver for outputting a constant voltage in response to another control signal from the timing controller, and a liquid crystal panel for applying the constant voltage to all sub-pixels of the liquid crystal panel in response to the scan signal.