Supplementary reset module, grid driving circuit and display device

Abstract

The invention provides a supplementary reset module used for a grid driving circuit. The supplementary reset module comprises a pull-up control unit, a pull-down control unit, a clock signal input end, a predetermined level input end, a first control signal input end, a second control signal input end and a signal output end, wherein a control end of the pull-up control unit is connected with the clock signal input end, an output end of the pull-up control unit is connected with the signal output end of the supplementary reset module, a first control end of the pull-down control unit is connected with the first control signal input end, a second control end of the pull-down control unit is connected with the second control signal input end, an input end of the pull-down control unit is connected with the predetermined level input end, and an output end of the pull-down control unit is connected with the signal output end. The invention further provides the grid driving circuit and the display device. The grid driving circuit provided by the invention can output stable signals.

Description

technical field [0001] The present invention relates to the field of display devices, in particular to a supplementary reset module for a gate drive circuit, a gate drive circuit including the supplementary reset module, and a display device including the gate drive circuit. Background technique [0002] The gate drive circuit of a display device usually includes cascaded multi-level shift register units, each level of shift register units includes a pull-up node and an output terminal, in order to achieve normal signal output, it is necessary to output Reset the pull-up node and output after scanning the signal. In order to enhance the driving capability of the gate driving circuit and reduce the falling time, the pull-up node and the output terminal of the shift register unit are usually reset respectively. [0003] In the gate drive circuit, the shift register unit of the latter stage provides a reset signal for the shift register unit of the previous stage, and the pull...

AI Technical Summary

Problems solved by technology

When the shift register unit of the next stage outputs, due to the existence of parasitic capacitance, the gate of the pull-down transistor (that is, the output reset terminal) will be coupled to a high level, and the output reset terminal of the shift register unit of the latter stage is connected to the The pull-up node reset terminal of the upper-level shift register unit is connected, so the potential of the pull-up node reset terminal of the upper-level shift register unit is also raised accordingly, resulting in the pull-up of the upper-level shift register unit node leakage

[0004] Therefore, how to avoid the phenomenon that the pull-up node of the shift register unit on the upper level of the shift register unit leaks electricity when the shift register unit is reset has become a technical problem to be solved urgently in this field.

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