Patent ID: 9466254
Filing Date: 2016-10-11
CPC Classification: G09G,G11C

Claim Text:
1. A shift register unit comprising a bidirectional scan pre-charging module, a pulling-up module, a pulling-down control module, a reset module and a pulling-down module; wherein the bidirectional scan pre-charging module is connected to a first signal input terminal, a first voltage terminal, a second signal input terminal, a second voltage terminal and a pulling-up control node, and is configured to control a potential at the pulling-up control node according to signals inputted from the first signal input terminal and the second signal input terminal, wherein the pulling-up control node is a connection point where the bidirectional scan pre-charging module and the pulling-up module are connected; the pulling-up module is connected to the pulling-up control node, a first clock signal terminal and a signal output terminal, and is configured to allow the signal output terminal to output a signal at the first clock signal terminal under the control of the potential at the pulling-up control node; the pulling-down control module is connected to a second clock signal terminal, a third clock signal terminal, a fourth clock signal terminal and a pulling-down control node, and is configured to control a potential at the pulling-down control node under the control of signals inputted from the second clock signal terminal, the third clock signal terminal, and the fourth clock signal terminal, wherein the pulling-down control node is a connection point where the pulling-down control module and the pulling-down module are connected; the reset module is connected to a third signal input terminal and the pulling-down control node, and is configured to control the potential at the pulling-down control node according to a signal inputted from the third signal input terminal, and to reset the potential at the pulling-up control node and an output signal of the signal output terminal under the control of the potential at the pulling-down control node prior to an operation of the shift register unit; and the pulling-down module is connected to the pulling-down control node, the pulling-up control node, a third voltage terminal and the signal output terminal, and is configured to pull down the potential at the pulling-up control node and the output signal of the signal output terminal to a level at the third voltage terminal under the control of the potential at the pulling-down control node.