Patent ID: 7038653

Claim:
A shift register in which a plurality of stages are connected one after another to each other, the stages having a first stage in which a start signal is coupled to an input terminal of the first stage, the shift register sequentially outputting output signals of each of the stages, each of the stages receiving one of a plurality of clock signals and a plurality of control signals, the one of the plurality of control signals controlling output of said one of the plurality of clock signals, each of the stages comprising: a pull-up section to provide said one of the plurality clock signals to an output terminal; a pull-up driving section to turn on the pull-up section in response to a front edge of an output signal of one of previous stages and to turn off the pull-up section in response to a front edge of said one of the plurality of control signals; a pull-down section to provide a first power voltage to the output terminal; a first pull-down driving section to output a second control signal in response to turn-on of the pull-up section; and a second pull-down driving section to turn off the pull-down section in response to a front edge of an input signal and to turn on the pull-down section in response to the second control signal.