Patent ID: 8299999

Claim:
A liquid crystal display, comprising: a plurality of pixel units arranged in a matrix, each pixel unit comprising a pixel electrode and a common electrode; a data driving circuit configured for providing a plurality of data voltages to each pixel electrode, the data voltages applied to each pixel electrodes being a sum of a main data voltage and an auxiliary voltage, the main data voltage having a square waveform, and the auxiliary voltage being periodically changed at intervals each formed by four continuous frames; a common voltage generating circuit configured for providing a common voltage having a constant value to each common electrode; and a gamma voltage generating circuit configured for providing gamma voltages to the data driving circuit; wherein the auxiliary voltage is less than a voltage difference between the main data voltage and the common voltage, in two frames of the four continuous frames, the voltage differences between the data voltages and the common voltage are substantially equal to an absolute value of Vdata−Vcom, and in remaining two frames of the two continuous frames, the voltage difference between the data voltages and common voltage in one of the remaining two frames is substantially equal to an absolute value of Vdata−Vcom−Vn; and in other one of the remaining two frames is substantially equal to an absolute value of Vdata−Vcom+Vn, where Vcom denotes the constant value of the common voltage, Vdata denotes the main data voltage, and Vn denotes an absolute value of the auxiliary voltage.