| 摘要 |
A bi-directional shift-register circuit for outputting data in different turns according to a switching signal. Each shift-register unit includes a first input terminal, a second input terminal, an output terminal and a clock input terminal for receiving the clock signal. The first switching circuit is coupled to the output terminal of the pre-stage shift-register unit, the output terminal of the next-stage shift-register unit and the switching signal, and outputs the signal of the output terminal of the pre-stage shift-register unit to the first input terminal of the present-stage shift-register unit and outputs the signal of the output terminal of the next-stage shift-register unit to the second input terminal of the present-stage shift-register unit when the switching signal is at a first voltage level, and outputs the signal of the output terminal of the next-stage shift-register unit to the first input terminal of the present-stage shift-register unit and outputs the signal of the output terminal of the pre-stage shift-register unit to the second input terminal of the present-stage shift-register unit when the switching signal is at a second voltage level.
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