Scan driving circuit and lcd device

A liquid crystal display (LCD) device, comprising:

• a scan driving circuit;
• wherein the scan driving circuit comprises a repair assembly, 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 turn-off unit;
• an output end of the pull-up assembly is coupled to a current scanning line, a clock scanning signal is sent to an input end of the pull-up assembly, and a control end of the pull-up assembly is coupled to an output end of the pull-up control assembly;
• a pull-up control signal is sent to a control end of the pull-up control assembly, and the reference low-level signal is sent to the output end of the pull-up control assembly and the current scanning line through the pull-down maintaining assembly;
• an input end of the pull-down maintaining assembly is coupled to the output end of the pull-up control assembly, and the reference low-level signal is sent to an output end of the pull-down maintaining assembly;
• an input end of the turn-off unit is coupled to the pull-down maintaining assembly, a control end of the turn-off unit is coupled to the output end of the pull-up control assembly, and the reference low-level signal is sent to an output end of the turn-off unit;
• an input end of the repair assembly is coupled to the pull-down maintaining assembly, the reference low-level signal is sent to an output end of the repair assembly through the turn-off unit, and a control end of the repair assembly is coupled to the output end of the pull-up control assembly;
• when the pull-down maintaining assembly turns off in a work stage of the current scanning line, the repair assembly turns off;
• when the pull-down maintaining assembly turns on in the work stage of the current scanning line, the repair assembly is connected with the pull-down maintaining assembly;
• in the work stage of the current scanning line, the reference low-level signal is sent to the repair assembly via the turn-off unit, and turns off the pull-down maintaining assembly through the repair assembly.