Patent ID: 9721515
Date: 2017-08-01
CPC Classifications: G02F,G09G

Claim:
1. A grayscale voltage compensating method of a liquid crystal display panel, wherein the liquid crystal display panel uses an alternating current driving manner and comprises a common electrode and a plurality of pixel electrodes disposed opposite to the common electrode, the common electrode is applied with a common voltage, and the plurality of pixel electrodes are each applied with grayscale voltages corresponding to a grayscale value, the grayscale voltages comprises a positive polarity grayscale voltage and a negative polarity grayscale voltage; the grayscale voltage compensating method comprises: obtaining an actual voltage distribution of the common voltage on the common electrode, wherein the step of obtaining an actual voltage distribution of the common voltage on the common electrode comprises: selecting a base position point on the common electrode, adjusting the common voltage on the base position point and the positive polarity grayscale voltage as well as the negative polarity grayscale voltage on a base pixel electrode opposite to the base position point to obtain an optimal common voltage, an optimal positive polarity grayscale voltage and an optimal positive grayscale voltage corresponding to the base pixel electrode, and determining actual voltage values of the common voltage on other position points except for the base position point when the common voltage on the base position point is the optimal common voltage; compensating the positive polarity grayscale voltage and the negative polarity grayscale voltage of each of the pixel electrodes according to the actual voltage distribution, wherein for the same grayscale value, a difference value between the compensated positive polarity grayscale voltage on the pixel electrode and the common voltage on an opposing position of the pixel electrode on the common electrode is equal to a difference value between the compensated negative polarity grayscale voltage and the common voltage on the opposing position; and wherein the step of compensating the positive polarity grayscale voltage and the negative polarity grayscale voltage of each of the pixel electrodes according to the actual voltage distribution comprises: compensating the optimal positive polarity grayscale voltage and the optimal negative polarity grayscale voltage according to the actual voltage values of the common voltage on opposing positions of the other pixel electrodes in the plurality of pixel electrodes except for the base pixel electrode on the common electrode to obtain the compensated positive polarity grayscale voltages and the compensated negative polarity grayscale voltages of the other pixel electrodes.