Shifting register unit, drive method thereof, grid drive circuit and display device

Abstract

The invention provides a shifting register unit, a drive method thereof, a grid drive circuit and a display device. The shifting register unit comprises a first pull-up node control unit, a second pull-up node control unit, a first pull-down node control unit, a second pull-down node control unit, a grid drive signal output unit and a carry signal output unit. The second pull-up node control unit is controlled by a first clock signal to control the potential of a pull-up node to be first potential at the pull-down keeping stage. The first pull-down node control unit is controlled by the first clock signal to control the potential of a pull-down node to be second potential at the pull-down keeping stage. The grid drive signal output unit is controlled by the pull-up node and the pull-down node to control a grid drive signal output end to output a grid drive signal. The carry signal output unit is controlled by the pull-up node and the pull-down node to control a carry signal output end to output a carry signal. The problems that under long-time or high-temperature reliability work conditions, the threshold voltage of a thin film transistor is greatly drifted and the response speed is low are solved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a shift register unit, a driving method thereof, a gate driving circuit and a display device. Background technique [0002] Existing gate driving circuits applied to display devices include multi-stage shift register units. The shift register unit includes a pull-up node control unit, a pull-down node control unit and a gate drive signal output unit, and the pull-up node control unit is connected to the pull-up node for controlling the potential of the pull-up node; the pull-down node The node control unit is connected to the pull-down node, and is used to control the potential of the pull-down node; the gate drive signal output unit is used to control and output the gate drive signal according to the potential of the pull-up node and the potential of the pull-down node, and the gate The polar driving signal is also used as the carry signal of the adjacent shift registe...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a shift register unit and its driving method, a gate driving circuit and a display device, so as to solve the large drift of the threshold voltage and the response speed of the thin film transistor in the prior art under long-term or high-temperature working conditions slow problem

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