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

A shift register and circuit technology, applied in the fields of shift register unit and driving method, gate drive circuit and display device, can solve the problems of abnormal display, incomplete pull-down of shift register unit, etc., and achieve the effect of reducing possibility

Active Publication Date: 2019-08-30
BOE TECH GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a shift register unit, a driving method, a gate drive circuit, and a display device, so as to solve the problem that an incomplete pull-down of an existing shift register unit may cause abnormal display

Method used

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  • Shift register unit and driving method thereof, grid driving circuit and display device
  • Shift register unit and driving method thereof, grid driving circuit and display device
  • Shift register unit and driving method thereof, grid driving circuit and display device

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0060] The transistors used in all embodiments of the present invention may be triodes, thin film transistors or field effect transistors or other devices with the same characteristics. In the embodiment of the present invention, in order to distinguish the two poles of the transistor except the control pole, one pole is called the first pole, and the other pole is called the second pole.

[0061] In actual operation, when the transistor is a triode, t...

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Abstract

The invention provides a shift register unit and a driving method thereof, a grid driving circuit and a display device. The shift register unit comprises a first node control circuit, a pull-down control circuit, a pull-up control circuit, an output circuit, a pull-down circuit and a reset circuit. According to the embodiment of the invention, the pull-down control circuit is arranged; the pull-down control circuit can be in an output reset stage; the potential of the pull-down node is controlled to be effective voltage; in other stages except an output reset stage contained in the display period, the potential of the pull-down node is controlled to be an invalid voltage, so that the pull-down module is prevented from being in a high-voltage stress state for a long time, the possibility offorward floating of a switch element in the pull-down module is reduced, the possibility of abnormal display is reduced, and the display stability is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a shift register unit, a driving method, a gate driving circuit and a display device. Background technique [0002] In the display industry, in order to reduce the production cost of the display panel, more and more gate drive circuits adopt the Gate Driver on Array (GOA) technology, that is, the gate switch circuit is integrated into the array of the display panel. On the substrate, in the gate drive circuit using GOA technology. [0003] The existing GOA circuit realizes the pull-down of the output level through the pull-down module. However, if the pull-down module is at a high level for too long, the pull-down tube of the pull-down tube module will always be in a positive voltage stress state (positive stress), which is likely to cause a threshold The voltage Vth is drifting forward, causing the pull-down module to not pull down completely, resulting in abnormal display. ...

Claims

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Application Information

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IPC IPC(8): G09G3/20G11C19/28
CPCG09G3/20G09G2310/0286G11C19/28
Inventor 王迎李蒙李红敏
Owner BOE TECH GRP CO LTD
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