Common electrode driving unit, liquid crystal display panel and liquid crystal display device

Abstract

The embodiment od of the invention provides a common electrode driving unit, a liquid crystal display panel and a liquid crystal display device, and the common electrode driving unit is used for providing driving voltage for a common electrode in the liquid crystal display panel. The liquid crystal display panel comprises a pixel electrode and a grid driving unit. The invention is characterized in that: the common electrode driving unit comprises an output unit which is connected between the grid driving unit and the common electrode; the output unit is used for correspondingly outputting a third driving voltage and a fourth driving voltage when the grid driving unit outputs a first driving voltage and a second riving voltage, wherein the second driving voltage is larger than the first driving voltage, and the third driving voltage is larger than the fourth driving voltage; and a first voltage difference and a second voltage difference mutually counteract, wherein the first voltage difference is voltage drop generated when the first driving voltage and the second driving voltage mutually convert on the pixel electrode, and the second voltage difference is the voltage drop generated when the third driving voltage and the fourth driving voltage mutually convert on the pixel electrode. By the invention, a flare phenomenon of a liquid crystal display is eliminated.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a common electrode drive unit, a liquid crystal display panel and a liquid crystal display device. Background technique [0002] In the liquid crystal display panel, there is a parasitic capacitance C between the gate and the drain of the thin film transistor gd , in such as figure 1 shown on the pixel electrode, the gate signal changes through the parasitic capacitance C gd The coupling effect of will produce a voltage difference ΔV on the pixel electrode p , so that the positive and negative display voltages with the same absolute value are no longer symmetrical with respect to the common electrode, resulting in different gray scales, and thus the liquid crystal display device will produce flickering phenomenon. [0003] In the prior art, the DC voltage output by the common electrode is adjusted so that the voltage drop on the common electrode is equal to the voltage diff...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a common electrode drive unit, a liquid crystal display panel and a liquid crystal display device. In the prior art, the process of adjusting the DC voltage of the common electrode to eliminate the flicker phenomenon needs to be realized according to the results and calculations. The process is too complex

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