Common electrode driving method, circuit and liquid crystal displayer

Abstract

The invention discloses a common electrode driving method, a circuit and a liquid crystal displayer. The common electrode driving method comprises the following steps of: generating first common electrode signals of pixels in each line on an array substrate and second common electrode signals on a color film substrate, causing the leaping time sequence of the first common electrode signals to be opposite to the leaping time sequence of grid signals of the pixels in the same line, and causing the charge variation on a memory capacitor, which is caused before or after the leaping of the first common electrode signals, to be equal to the charge variation on a parasitic capacitor, which is caused before or after the leaping of the grid signals; and inputting the first common electrode signalsto the pixels in each line and the second common electrode signals to the color film substrate. The method can cause the variation of charge on the parasitic capacitor and that on the storage capacitor to cancel out each other so as to achieve the zero charge variation of pixel electrodes, thus causing the leaping voltage of the pixel electrodes to be zero, ensuring the accuracy of the pixel electrode voltage and avoiding the flickering of the images.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a common electrode driving method and circuit and a liquid crystal display. Background technique [0002] A liquid crystal display is a commonly used flat panel display at present, and a Thin Film Transistor Liquid Crystal Display (TFT-LCD for short) is a mainstream product in the liquid crystal display. [0003] In the prior art, a liquid crystal display is composed of a plurality of pixels arranged in a matrix, figure 1 It is the equivalent circuit schematic diagram of the unit pixel in the prior art liquid crystal display, such as figure 1 As shown, when the TFT-LCD is working, on the array substrate, a gate-on voltage is first applied to the gate electrode g connected to the gate line Gn, and the TFT is turned on, so that the data voltage of the display image signal on the data line Dm is passed through The source electrode s is applied to the drain electrode d; the drai...

AI Technical Summary

Problems solved by technology

Due to the parasitic capacitance Cgd formed between the gate electrode g and the drain electrode d, the violent fluctuation of the voltage when the gate line Gn is turned on and off will be applied to the pi

Images