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A gate driving circuit, method and display device

A gate drive circuit, gate signal technology, applied in the direction of static indicators, digital memory information, instruments, etc., can solve problems such as threshold voltage shift

Active Publication Date: 2020-06-23
BOE TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a gate drive circuit, method and display device to solve the threshold voltage shift problem in the existing bidirectional scanning gate drive circuit

Method used

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  • A gate driving circuit, method and display device
  • A gate driving circuit, method and display device
  • A gate driving circuit, method and display device

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Embodiment Construction

[0045]In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] An embodiment of the present application provides a gate drive circuit, referring to figure 2 The gate drive circuit includes a first scan control module 21, a first voltage divider module 22, a charging and discharging module 23 and an output module 24;

[0047] The first scan control module 21 is respectively connected to the first voltage signal input terminal VDD_A, the second voltage signal input terminal VDD_B, the first node PD_A, and the second node PD_B, and is configured to, according to the voltage of the first voltage signal input terminal VDD_A, Controlling the voltage of the first voltage signal input terminal VDD_A to be written into the first node PD_A; according to the voltage of the second voltage signal i...

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Abstract

The present application provides a gate drive circuit, method and display device, wherein the gate drive circuit includes a first scan control module, a first voltage divider module, a charging and discharging module, and an output module; the gate control voltage of the output module is also That is, the voltage of the third node is controlled by the charging and discharging module. Since the voltage signals input by the fourth voltage signal input terminal Forward and the fifth voltage signal input terminal Backward connected to the charging and discharging module are pulse signals, the charging and discharging module The TFT active layer will not be under stress for a long time, and its threshold voltage will not shift negatively, which is conducive to maintaining the third node voltage, that is, the gate control voltage of the output module, so that the gate drive circuit can output normally.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a gate driving circuit, method and display device. Background technique [0002] figure 1 It shows a schematic structural diagram of the bidirectional scanning GOA unit used in the prior art. Since one end of the charging and discharging module 10, that is, the first pole of the first transistor M1 is directly connected to the DC voltage terminal VDD, and during the forward scanning process, VDD is at a high level, and VDD is at a low level during the negative scanning process, which makes the active layer of the device M1 in the charging and discharging module 10 bear stress for a long time, causing the threshold voltage Vth of M1 to easily shift negatively, and also That is, M1 is prone to leakage current, which affects the voltage of the PU point, that is, the gate control voltage of the output module 11 is maintained. For example, after a long time of positive scann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20
CPCG09G3/20G09G2310/0267G09G2310/0283G09G2310/0286G11C19/28G09G2300/0426G09G2310/08
Inventor 王志冲韩承佑商广良郑皓亮袁丽君姚星韩明夫
Owner BOE TECH GRP CO LTD
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