Patent ID: 8018423

Claim:
A shift register, applied to a scan driver of a liquid crystal display (LCD) for generating a plurality of scan signals, the shift register comprising a plurality of stages of shift register units, each of the shift register units comprising: a first level lifting unit and at least a second level lifting unit, for respectively providing a first timing signal to a first output terminal and at least a second timing signal to at least a second output terminal; a first level lowering unit and at least a second level lowering unit, for respectively providing a first voltage to the first output terminal and at least a second output terminal; a first driving unit, coupled to input terminals of the first level lifting unit and the second level lifting unit at a first node, wherein a voltage of the first node is a first control signal, and the first driving unit is for turning on the first level lifting unit and the second level lifting unit in response to a front edge of an input signal and turning off the first level lifting unit and the second level lifting unit as a level of a second control signal is higher than a level of a third control signal; and a second driving unit, coupled to input terminals of the first level lowering unit and the second level lowering unit at a second node, wherein the second driving unit is for turning off the first level lowering unit and the second level lowering unit in response to a front edge of the first control signal and turning on the first level lowering unit and the second level lowering unit in response to a rear edge of the first control signal; wherein the first output terminal and the second output terminal are for respectively outputting a first scan signal and a second scan signal; wherein the input signal is the second scan signal of the previous-stage shift register unit.