Shift register unit and driving method thereof, gate driving circuit and display device

Abstract

The embodiment of the invention provides a shift register unit and a driving method thereof, a gate driving circuit and a display device and relates to the technical field of displaying, aiming at reducing the probability of causing noise interference at an output end of the shift register unit in a GOA (Gate On Array) circuit. The shift register unit comprises a pull-up control module which is used for outputting voltage of a signal input end to a pull-up node; the pull-up module is used for outputting voltage of a first clock signal input end to a signal output end; a pull-down control module is used for outputting voltage of a second clock signal input end to a pull-down node or pulling the voltage of the pull-down node down to a first voltage end; a pull-down module is used for pulling the voltage of the pull-up node and the signal output end down to the first voltage end respectively; a resetting module is used for pulling the voltage of the pull-up node and the signal output end down to the first voltage end; and a noise control module is used for outputting the voltage of a noise reduction control signal end to the pull-down node at blanking time of an image frame. The shift register unit is used for driving a gate line connected with the shift register unit.

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] Liquid Crystal Display (LCD for short) has the advantages of low radiation, small size and low power consumption, and is widely used in electronic products such as notebook computers, flat-screen TVs or mobile phones. [0003] In the prior art, a GOA (Gate Driver on Array, array substrate row driving) circuit is usually arranged around the array substrate in a liquid crystal display for progressively scanning the gate lines. Specifically, within an image frame, the GOA circuit scans the gate lines line by line from top to bottom or bottom to top. Taking the scanning of the grid lines from top to bottom as an example, after scanning the last row of grid lines, the GOA circuit needs to return from the last row to the first row to enter the scanning ...

AI Technical Summary

Problems solved by technology

[0004] However, during the above blanking time, due to the influence of the structure of the GOA circuit and the coupling capacitance of its internal transistors, the charges stored in some nodes or transistors of the GOA circuit are not fully released. In this way, during the above blanking time, It will cause noise interference to the output of the shift register unit in the GOA circuit and reduce the stability of the GOA circuit

Images