Patent ID: 9269316
Filing Date: 2016-02-23
CPC Classification: G09G,G11C

Claim Text:
1. A shift register, comprising a driving module, an output module, a first pull-down module and a second pull-down module; wherein the driving module is connected to the output module; the first pull-down module is connected to the driving module, the output module and a second level signal input terminal; the second pull-down module is connected to the driving module, the output module and the second level signal input terminal; wherein a connection point of the driving module, the output module, the first pull-down module and the second pull-down module is a pull-up node, a connection point of the first pull-down module and the driving module is a first pull-down node, a connection point of the first pull-down module and the output module is a control signal output terminal of the shift register; a connection point of the second pull-down module and the driving module is a second pull-down node, and a connection point of the second pull-down module and the output module is the control signal output terminal of the shift register; wherein the driving module is configured to control the pull-up node to be at a first level and control the first pull-down node and the second pull-down node to be at a second level when a selection signal received is at the first level or changed from the first level to the second level, and to control a signal at the first pull-down node to be same as a clock signal and control a signal at the second pull-down node to be same as a clock block signal when the pull-up node is at the second level; the output module is configured to connect the control signal output terminal of the shift register and a clock signal input terminal under the control of the signal at the pull-up node; the first pull-down module is configured to connect the pull-up node and the second level signal input terminal and connect the control signal output terminal of the shift register and the second level signal input terminal when the signal at the first pull-down node is at the first level; the second pull-down module is configured to connect the pull-up node and the second level signal input terminal and connect the control signal output terminal of the shift register and the second level signal input terminal when the signal at the second pull-down node is at the first level.