Shift register of a display device

Details Shift register of a display device Shift register of a display device

2011-07-12

2011-07-12

Lam, Tuan (Department: 2816)

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

Shift register

C377S078000, C377S079000

Reexamination Certificate

active

07978809

ABSTRACT:
A shift register includes a plurality of shift register units each including an input circuit, a pull-up circuit and a pull-down circuit. The shift register unit receives an input voltage at an input end and provides an output voltage at an output end. The input circuit controls the signal transmission path between a first clock signal and a first node according to the input voltage. The pull-up circuit controls the signal transmission path between a second clock signal and the output end according to the level of the first node. The pull-down circuit includes a pull-down unit and a control unit. The pull-down unit maintains the level of the first node or the output end according to the level of the second node. The control unit maintains the level of the second node according to the first clock signal, the second clock signal and the level of the first node.

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