Jianq Chyun IP Office
Liquid crystal display and bidirectional shift register device thereof
An LCD and a bidirectional shift register device thereof are provided. The bidirectional shift register device of the invention is disposed on the substrate of the panel and includes multi-stages shift registers in series connection. Each stage shift register includes a pre-charging unit, a pull-up unit and a pull-down unit, in which the pre-charging unit receives a first preset clock signal and the output from a (i−1)th stage shift register or a (i+1)th stage shift register so as to thereby output a charging signal. The pull-up unit receives the charging signal and a second preset clock signal so as to thereby output a scan signal. The pull-down unit receives the second preset clock signal, a third preset clock signal and the output from the (i+2)th stage shift register or the (i−2)th stage shift register so as to decide whether or not pulling down the scan signal to a reference level.
HannStar Display Corporation
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G09G G02F G09G G09G G09G G11C
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Chia-Hua Chien-Ting Chien-Chuan Chun-Lin
Yu Chan Ko Chang