Patent ID: 9530375
Filing Date: 2016-12-27
CPC Classification: G09G

Claim Text:
1. A scan driving circuit, executing a driving operation for cascaded scan lines, comprising: a pull-up control module receiving a previous-level down-stream signal, and generating a scan level signal corresponding to one of the scan lines according to the previous-level down-stream signal; a pull-up module pulling up a scan signal of the corresponding scan line according to the scan level signal and a present-level clock signal; a pull-down module pulling down a scan signal of the corresponding scan line according to a next-level down-stream signal; a pull-down maintaining module keeping the scan signal of the corresponding scan line in a low-level; a down-stream module transmitting a present-level down-stream signal to a next-level of the pull-up control module; a bootstrap capacitor generating a high-level of the scan signal of the scan line; a reset module executing a reset operation for the scan level signal of the present-level scan line; a constant-voltage low-level source, comprising: wherein the pull-up control module comprises a first switch transistor, a control end of the first switch transistor inputs the previous-level down-stream signal, an input end of the first switch transistor inputs the constant high-level, and an output end of the first switch transistor is connected to the pull-up module, the pull-down module, the pull-down maintaining module, the down-stream module, and the bootstrap capacitor.