Gate drive method in which a flickering phenomen is eliminated and gate drive device of liquid crystal display

摘要

The embodiments of the present disclosure discloses a gate drive method and a gate drive device of a liquid crystal display, which can avoid the influence by the voltage difference ΔVp between the pixel voltage and the data line voltage, and eliminate the flickering phenomenon and the residual image caused by the residual direct current effectively. The gate drive method of the liquid crystal display comprises: inputting a compensation voltage Vgc to the n-th row of gate line when the n-th row of gate line is turned off completely in the current frame; keep on inputting the compensation voltage Vgc; and stopping inputting the compensation voltage Vgc to the n-th row of gate line when a turn-on voltage Vgh is input to the n-th row of gate line in the next frame; wherein, N≦the total number of the gate lines.

主权项

1. A gate drive method of a liquid crystal display, comprising:
inputting a turn-on voltage Vgh to a n-th row of gate line to control the gate line to be turned on; inputting a turn-off voltage Vgl to the n-th row of gate line to control the gate line to be turned off until a timing at which the n-th row of gate line is turned off completely; adding a compensation voltage Vgc to the turn-off voltage Vgl and inputting the added voltage Vgc+Vgl to the n-th row of gate line when the n-th row of gate line is turned off completely in a current frame; keep on inputting the added voltage Vgc+Vgl to cancel out a voltage difference between a pixel voltage of a pixel electrode and a voltage of a data line signal so as to eliminate a flickering phenomenon caused by the voltage difference; and stopping inputting the added voltage Vgc+Vgl to the n-th row of gate line when the turn-on voltage Vgh is input to the n-th row of gate line in a next frame, wherein, n is a positive integer and n≦the total number of the gate lines; the compensation voltage is Vgc=Vgh×Cgs/Cst, Cgs representing a capacitance of a thin film transistor, and Cst representing a capacitance of a storage capacitor.