Method and system for reducing residual image effect of liquid crystal display after turned off
View Patent ↗A system for reducing the residual image effect of a liquid crystal display after turned off is described, which includes a timing controller, a source driver, a gate driver, and a plurality of thin film transistors on the panel of the liquid crystal display. The system first transmits an image signal to the panel of the liquid crystal display by means of the timing controller in a period of time from when a backlight of the liquid crystal display is turned off to when an image data transmission is turned off. The system then transmits a control signal to the gate driver through the timing controller to turn on all the thin film transistors during a period of time from when the image data transmission is turned off to when the power to the liquid crystal display is turned off. Therefore, residual electric charges in the thin film transistors are discharged rapidly via a plurality of source lines of the source driver, and the residual image effect is consequently diminished.
1. A method for reducing the residual image effect of a liquid crystal display after turned off, comprising:
transmitting an image signal to the liquid crystal display by a timing controller after turning off a backlight of the liquid crystal display;
transmitting a control signal to the liquid crystal display by the timing controller after turning off the image data transmission; and
turning on a plurality of thin film transistors on the liquid crystal display after turning off the image data transmission and before turning off the power of the liquid crystal display to discharge residual charges.
2. The method of claim 1 , wherein the transmitting of an image signal is performed before turning off the image data transmission.
3. The method of claim 1 , wherein the image signal comprises a white image signal.
4. The method of claim 1 , wherein the image signal comprises a black image signal.
5. The method of claim 1 , wherein the liquid crystal display further comprises a source driver and a gate driver.
6. The method of claim 5 , wherein the gate driver is used to turn on the thin film transistors.
7. A method for reducing residual image effect applied to a liquid crystal display, comprising:
turning off a backlight of the liquid crystal display;
transmitting an image signal to the liquid crystal display by a timing controller;
turning off the image data transmission;
transmitting a control signal to the liquid crystal display by the timing controller;
turning on a plurality of thin film transistors on the liquid crystal display after turning off the image data transmission to discharge residual charges; and
turning off a power to the liquid crystal display after turning on the thin film transistors.
8. The method of claim 7 , wherein the image signal comprises a white image signal.
9. The method of claim 7 , wherein the image signal comprises a black image signal.
10. The method of claim 7 , wherein the liquid crystal display further comprises a source driver and a gate driver.
11. The method of claim 10 , wherein the gate driver is used to turn on the thin film transistors on the liquid crystal display.
12. A system for reducing the residual image effect of a liquid crystal display after turned off, comprising:
a timing controller configured to transmit an image signal and a control signal;
a source driver electrically coupled with the timing controller, wherein the source driver further has a plurality of source lines;
a gate driver electrically coupled with the timing controller; and
a plurality of thin film transistors electrically coupled to the source driver and the gate driver,
wherein the timing controller transmits the image signal to the source driver in a time period causing a voltage of the thin film transistors to be substantially close to a voltage of a common voltage generator, and the timing controller transmits the control signal to the gate driver to turn on the thin film transistors after turning off the image data transmission and before turning off the power of the liquid crystal display such that residual charges are discharged via the source lines.
13. The system of claim 12 , wherein the time period begins when a backlight of the liquid crystal display is turned off and ends when the image data transmission is turned off.
14. The system of claim 12 , wherein the image signal comprises a black image signal.
15. The system of claim 12 , wherein the image signal comprises a white image signal.