Patent ID: 8232946
Filing Date: 2012-07-31
Classification: G09G

Abstract:
1. A liquid crystal display comprising: liquid crystal cells arranged in (m×n) matrices, where m and n are positive integers equal to or greater than two, and configured to display an image using liquid crystal molecules driven by a potential difference between each of pixel electrodes and each of the common electrodes; m data lines to which data voltages each are supplied; n gate lines to which scanning pulses each are supplied; n common electrode lines, connected with the common electrodes, to which common voltages each are supplied and which correspond to the n gate lines, respectively; (m×n) storage capacitors between the pixel electrodes and the gate lines and configured to maintain voltages of the liquid crystal cells; a data driver configured to inverse a polarity of each data voltage and to supply the data voltage to each data line; a common voltage controller configured to change a potential of each common voltage and to supply the common voltage to each common electrode line, wherein the potential of the common voltage is changed synchronizing with the rising edge of a corresponding scanning pulse each frame unit and the changed potential of the common voltage is maintained for one frame; wherein the common voltage controller supplies a first potential of the common voltage to the common electrode line if a polarity of the data voltage is positive, and supplies a second potential of the common voltage higher than the first potential to the common electrode line if the polarity of the data voltage is negative; and wherein an amplitude (VGH-VGL) of each scanning pulse is |(Vd-High+Gate-On)-(Vd-Low−Gate-Off)|, wherein VGH is a gate high voltage, VGL is a gate low voltage, Vd-High is a data high voltage, Gate-On is a gate-on voltage, Vd-Low is a data low voltage, and Gate-Off is a gate-off voltage.