Patent ID: 7586477

Claim:
An active matrix liquid crystal display apparatus, comprising: a plurality of pixels each including pixel switching transistors having a gate electrode, a first electrode, and a second electrode connected to a pixel electrode; a plurality of data signal lines each connected to the first electrode associated with any one of the pixel switching transistors; a plurality of gate signal lines each connected to the gate electrode associated with any one of the pixel switching transistors; a low level gate voltage generator that supplies a first gate voltage to a gate driver; and a high level gate voltage generator that supplies a second gate voltage to the gate driver, the gate driver including: a shift register that outputs a control pulse to a level shifter that has a logic state that transitions from a first logic level to a second logic level for each gate line; and the level shifter connected to the plurality of the gate signal lines, said level shifter receiving the first and second gate voltages and outputting the first gate voltage in response to the first logic level of the control pulse and the second gate voltage in response to the second logic level of the control pulse to drive the plurality of gate signal lines sequentially, wherein the high level gate voltage generator reduces the second gate voltage received by the level shifter to a voltage level substantially at a threshold voltage level of the one of the pixel switching transistors but enough to maintain an on-state of the pixel switching transistor until the control pulse supplied to the level shifter has the first logic level and the level shifter outputs the first gate voltage that turns off the one of the pixel switching transistors.