Patent ID: 9570026
Date: 2017-02-14
CPC Classifications: G09G,G11C

Claim:
1. A scan driving circuit, comprising: a pull-up assembly; a pull-up control assembly that drives the pull-up assembly; a pull-down maintaining assembly; a reference low-level signal; and a pull-down maintaining signal; wherein an output end of the pull-up assembly is coupled to a current scanning line, and the reference low-level signal is sent to the output end of the pull-up control assembly and the current scanning line via the pull-down maintaining assembly; the pull-down maintaining signal is sent to a control end of the pull-down maintaining assembly; when the current scanning line is active, a voltage of the pull-down maintaining signal is less than a voltage of the reference low-level signal, and the pull-down maintaining assembly is controlled by the pull-down maintaining signal to make the reference low-level signal be not sent to the output end of the pull-up control assembly and the current scanning line, wherein the pull-down maintaining assembly comprises a first pull-down maintaining assembly and a second pull-down maintaining assembly; input ends of the first pull-down maintaining assembly and the second pull-down maintaining assembly are coupled to the output end of the pull-up control assembly, the pull-down maintaining signal is sent to control ends of the first pull-down maintaining assembly and the second pull-down maintaining assembly, and the reference low-level signal is sent to output ends of the first pull-down maintaining assembly and the second pull-down maintaining assembly; the scan driving circuit further comprises a diverter switch connected between the control ends of the first pull-down maintaining assembly and the second pull-down maintaining assembly, and a control end of the diverter switch is coupled to the output end of the pull-up control assembly; when the current scanning line is active, the diverter switch turns of the first pull-down maintaining assembly and the second pull-down maintaining assembly, thus, the reference low-level signal is not sent to the output end of the pull-up control assembly and the current scanning line.