Patent ID: 6392626
Filing Date: 2002-05-21
Classification: G09G

Abstract:
A liquid crystal display device, comprising:a first panel having a plurality of thin film transistors, with a gate electrode, a source electrode and a drain electrode, a plurality of gate lines, a plurality of data lines crossing the gate lines and a plurality of pixel electrodes, a plurality of thin film transistors (TFTs) each being coupled to the respective pixel electrode, the respective gate line and the respective data line; a second panel having a common electrode facing the pixel electrode; a gate driver supplying gate signals to turn on or off the thin film transistors; a data driver supplying a data voltage to the data line for displaying images; and a common voltage generator that supplies a first common voltage to a first point on the common electrode, and supplies a second common voltage to a second point on the common electrode, the second common voltage being higher than the first common voltage, wherein the common voltage generator comprises: a voltage supply; a first resistor of which one end is coupled to the voltage supply and the other end is coupled to the second point; and a second resistor in which one end is coupled to ground and the other end is coupled to the first point, and wherein the first resistor or the second resistor is a variable resistor, and the first point is electrically coupled to the second point through an internal resistor in the second panel.