Patent ID: 8049698

Claim:
A liquid crystal display, comprising: a liquid crystal display panel having a plurality of data lines, a plurality of gate lines crossing the plurality of data lines, and a plurality of liquid crystal cells; a timing controller to determine gray levels of input digital video data and a time at which a polarity of a data voltage to be supplied to the data lines is inverted, to activate a dynamic charge share control signal to indicate a time at which the gray level of the data voltage is changed from a white gray level to a black gray level and a time at which the polarity of the data voltage is inverted, to detect weakness patterns in which the data of the white gray level and the black gray level are regularly arranged in the input digital video data, and to activate a dot inversion control signal for widening a horizontal polarity inversion period of data voltages to be supplied to the data lines when the weakness patterns are input; a data driving circuit to convert the digital video data from the timing controller into the data voltage, to convert the polarity of the data voltage, to perform a charge sharing in response to the dynamic charge share control signal, and to widen the horizontal polarity inversion period of the data voltages in response to the dot inversion control signal; and a gate driving circuit to sequentially supply a scan pulse to the gate lines under the control of the timing controller, wherein one of a common voltage and a charge share voltage between a positive data voltage and a negative data voltage is supplied to the data lines during the charge sharing, and wherein the data driving circuit continuously supplies the data voltage with the charge sharing only when the gray level of data and the polarity of the data voltage is unchanged.