Patent ID: 9734794
Date: 2017-08-15
CPC Classifications: G09G

Claim:
1. A device for driving a liquid crystal display, in which a pixel voltage is reduced by a kickback voltage variable according to a grayscale, the device comprising: a signal controller configured to receive an input image signal corresponding to the grayscale from outside; an image signal corrector configured to correct the input image signal and generate a data input signal based on the corrected input image signal; and a data driver configured to supply a data voltage corresponding to the grayscale based on the data input signal, wherein the grayscale comprises a black grayscale, a white grayscale, and an intermediate grayscale between the black grayscale and the white grayscale, the data voltage comprises a positive voltage and a negative voltage, and when a difference between a sum of the positive voltage and the negative voltage, and a common voltage, is defined as an offset value, a first offset value corresponding to the black grayscale, a second offset value corresponding to the white grayscale and a third offset value corresponding to the intermediate grayscale satisfy the following inequation: