Shift register circuit having bi-directional transmission...

Details Shift register circuit having bi-directional transmission... Shift register circuit having bi-directional transmission...

2011-04-19

2011-04-19

Lam, Tuan (Department: 2816)

Electrical pulse counters, pulse dividers, or shift registers: c

Shift register

C377S069000, C377S078000, C377S079000

Reexamination Certificate

active

07929658

ABSTRACT:
A shift register includes a plurality of shift register stages for providing gate signals. Each shift register stage has a pull-up unit, a carry unit, a carry control unit, an input unit and a pull-down unit. The pull-up unit is employed to pull up a gate signal according to a driving control voltage and a first clock. The carry unit generates a preliminary start pulse signal based on the driving control voltage and the first clock. The carry control unit outputs the preliminary start pulse signal to become a forward or backward start pulse signal according to first and second bias voltages. The input unit is utilized for inputting a start pulse signal generated by a preceding or succeeding shift register stage to become the driving control voltage. The pull-down unit pulls down the gate signal, the preliminary start pulse signal and the driving control voltage according to multiple clocks.

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