Patent ID: 8456408

Claim:
A shift register applied to a double-side scan driver of a display panel, the shift register comprising a plurality of odd numbered stages of shift register units and a plurality of even numbered stages of shift register units, which are respectively disposed on two opposite sides of the display panel, wherein an n th stage of shift register unit in the shift register units generates a scan signal via an output terminal, wherein n is a natural number, and the n th stage of shift register unit comprises: a level pull-up circuit for making the scan signal be equal to a first clock signal in response to an enabled level of a first control signal; a level pull-down circuit for making the scan signal be equal to a first voltage in response to an enabled level of a second control signal; a driving circuit for controlling the first control signal to be the enabled level in response to an enabled level of an input signal, and controlling the first control signal to be a disabled level in response to the enabled level of the second control signal; and a level controlling circuit for controlling the second control signal to be a disabled level in response to the enabled level of the input signal, and controlling the second control signal to be the enabled level in response to a disabled level of the input signal.