Patent ID: 9305511
Filing Date: 2016-04-05
CPC Classification: G09G

Claim Text:
1. A common electrode voltage compensating method, comprising: making statistics for grey scale data of every pixel for displaying a display picture; accumulating the grey scale data of pixels in each row to obtain a summation of the grey scale data for every row of pixels, and calculating a grey scale shifting rate between two adjacent rows of the pixels based on the respective summations of the grey scale data of two adjacent rows of pixels; obtaining common electrode voltage compensation signal parameters based on the grey scale shifting rate; generating positive/negative polarity information of the common electrode voltage compensation signal parameters based on a pixel voltage polarity inversion signal; generating a common electrode voltage compensation control signal based on the common electrode voltage compensation signal parameters and the positive/negative polarity thereof, to cause a common electrode generating unit to generate a common electrode input voltage having a waveform of a compensation voltage based on the common electrode voltage compensation control signal, wherein calculating the grey scale shifting rate between two adjacent rows of the pixels based on the respective summations of the grey scale data of two adjacent rows of pixels comprises: calculating a maximum absolute value N of difference values, each of which is calculated between the respective summations of the grey-scale data for every two rows of pixels, wherein N=(2 calculating the difference value (A deciding whether positive/negative properties of A determining the grey scale shifting rate between the i if the positive/negative properties are the same, and determining the grey scale shifting rate between the i th row and the (i+1) th row of pixels is if the positive/negative properties are different.