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. 26, 2008
Filed:
Sep. 24, 2004
Hsin-chung Huang, Taipei County, TW;
Juin-ying Huang, Taoyuan County, TW;
I-cheng Chen, Changhua County, TW;
Hsin-Chung Huang, Taipei County, TW;
Juin-Ying Huang, Taoyuan County, TW;
I-Cheng Chen, Changhua County, TW;
Chunghwa Picture Tubes, Ltd., Taipei, TW;
Abstract
A control circuit and a method discharging capacitor/transistor, for a liquid crystal display (LCD), are provided. The control circuit includes a signal-off detector and an all-gate-on delay cell. When an LCD power-off signal is detected, a first control signal is transmitted to a power supply module for turning off power except the gate-on voltage, and turning off VGH after a specific delay time. A second control signal is also transmitted to the gate-on-delay cell, so that all gates of the pixel transistors are turned on after a second specific delay time. The charges on the pixel transistor are discharged via a source thereof before the gate-on voltage decreases below a threshold value, such that a residual image phenomenon caused by heterogeneous filming fabrication is reduced.