| 摘要 |
<p>PURPOSE: A shift register is provided to perform bidirectional scanning by improving an input part of an existing structure. CONSTITUTION: An input part(60) outputs the direction input signal of forward and reverse directions to a first node. An inverter part(20) is connected to the first node. The inverter part generates an inverting signal of the first node for outputting to a second node. A pull-up pull-down circuit part(40) is connected to the first node. The pull-up pull-down circuit part comprises a pull-up part and a pull-down part. The pull-up part activates a first clock signal with the signal of the first node and outputs the first clock signal into an output signal. The pull-down part activates a pull-down output signal with the signal of the second node. A reset part(30) periodically resets the first node with a second clock signal.</p> |
