Patent ID: 8022910

Claim:
A liquid crystal display comprising: a signal control unit which supplies an n-th image signal; a voltage supply unit which outputs a first reference voltage when the n-th image signal is not at a highest grayscale level and outputs a second reference voltage having a voltage level higher than that of the first reference voltage when the n-th image signal is at the highest grayscale voltage level; a grayscale voltage generating unit which receives the first reference voltage or the second reference voltage and generates first to n-th positive-polarity grayscale voltages having positive polarity with respect to a common voltage and first to n-th negative-polarity grayscale voltages having negative polarity with respect to the common voltage; and a data driving unit which receives the n-th image signal, the first to n-th positive-polarity grayscale voltages and the first to n-th negative-polarity grayscale voltages and applies an image data voltage corresponding to the n-th image signal to a pixel.