Hannstar Display Corporation

Chun-Lin Chang

Chien-Ting Chan

Chia-Hua Yu

Chien-Chuan Ko

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&#x2212;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&#x2212;2)th stage shift register so as to decide whether or not pulling down the scan signal to a reference level.

Growing community of inventors

Tainan, Taiwan

Chun-Lin Chang