Patent ID: 8279150
Filing Date: 2012-10-02
Classification: G09G

Abstract:
1. A liquid crystal display, comprising: a first gate lines of a first group that supplies a first scanning signal; a second gate lines of a second group that supplies a second scanning signal; a data line that supplies a data signal; first and second external common lines crossed with the first gate lines and the second gate lines outside of an image display; a plurality of common lines that supplies a common voltage provided by the external common line; a first thin film transistor that supplies the data signal in response to the first scanning signal; a liquid crystal cell including a pixel electrode connected to the first thin film transistor and a common electrode connected to the common line; and a second thin film transistor that supplies the common voltage to the pixel electrode in response to the second scanning signal, instead of black data, and the second thin film transistor is connected to any one gate line of second gate lines of the second group, any one common line of common lines, and a pixel electrode of the liquid crystal cell, wherein each first gate line of the first group is alternatively formed with each second gate line of the second group, respectively, wherein the second gate lines of the second group are sequentially driven by the second scanning signal, after the first gate lines of the first group are sequentially driven by the first scanning signal, wherein the first scanning signal is generated by shifting a first gate starting pulse from a timing controller according to a gate shifting clock in each frame, and the second scanning signal is generated by shifting a second gate starting pulse from the timing controller according to the gate shifting clock in each frame, wherein each common line is formed between each first gate line of the first group and each second gate line of the second group and connected to the first and second external common lines, wherein the second thin film transistor supplies the pixel electrode with the common voltage, after said first thin film transistor allows the data signal to be charged in the pixel electrode and be held, wherein a period of keeping the data signal charged in the pixel electrode by the first thin film transistor is changed by a turning-on time of the second thin film transistor.