Patent ID: 9483992
Filing Date: 2016-11-01
CPC Classification: G09G,G11C

Claim Text:
1. A gate drive circuit, comprising multistage gate driver on array (GOA) drive units, wherein each stage of GOA drive unit comprises: a pull-up control part for outputting a pull-up control signal; a pull-up part, wherein a control end thereof is coupled to an output end of the pull-up control part, so that a potential at a gate signal output end is pulled up according to the pull-up control signal and a clock signal, whereby a gate signal is outputted from a current stage of GOA drive unit; a key pull-down part, which is coupled between a control end of the pull-up part and a direct current power source, so that a potential at the control end of the pull-up part is pulled down to a potential of the direct current power source according to a pull-down control signal, thereby disenabling the pull-up part; and a pull-down holding part coupled to the gate signal output end, the control end of the pull-up part and the direct current power source, comprising a bridging module, and a first and a second pull-down holding modules, wherein when the bridging module is in a shutoff state, pull-down holding control signals outputted respectively from the first and the second pull-down holding modules have complementary phases, so that the first and the second pull-down holding modules operate alternately, thereby a potential at the gate signal output end and/or a potential at the control end of the pull-up part are/is kept at a potential of the direct current power source according to the pull-down holding control signals.