| 摘要 |
A shift register includes a plurality of register units cascade-connected with each other. Each register unit includes a pull-up circuit, a pull-up driving circuit, a pull-down circuit, and a pull-down driving circuit. The pull-up circuit coupled to a first clock signal is used for providing an output signal. The pull-up driving circuit turns on in response to a driving pulse from a previous register unit and a second clock signal, and turns off in response to a third clock signal. The pull-down driving circuit which is coupled to an input node of the pull-down circuit, turns on in response to a first clock signal, and turns off in response to a the first clock signal or output of the pull-up driving circuit.
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