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

A shift register and gate drive technology, applied in static memory, digital memory information, instruments, etc., can solve problems such as the inability to improve the output stability of the gate drive signal and the inability of the shift register to maintain internal nodes, and achieve stable output. , Guarantee the display effect

Active Publication Date: 2017-06-13
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a shift register unit and its driving method, gate drive circuit and display device, to solve the problem that the existing shift register cannot maintain internal nodes under the feedback of the output terminal of the gate drive signal Potential, so that the stability of the gate drive signal output cannot be improved

Method used

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  • Shifting register unit and drive method thereof, gate drive circuit and display device
  • Shifting register unit and drive method thereof, gate drive circuit and display device
  • Shifting register unit and drive method thereof, gate drive circuit and display device

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Experimental program
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specific Embodiment approach

[0072] According to a specific implementation manner, the input module includes:

[0073] an input transistor, the gate of which is connected to the signal input terminal, the first pole is connected to the first voltage terminal, and the second pole is connected to the pull-up node;

[0074] The reset module includes:

[0075] The reset transistor has a gate connected to the reset terminal, a first pole connected to the pull-up node, and a second pole connected to the second voltage terminal.

[0076] When scanning in the forward direction, the input terminal is connected to the gate drive signal output terminal of the adjacent upper-stage shift register unit, and the reset terminal is connected to the gate drive signal output terminal of the adjacent next-stage shift register unit. connect.

[0077] When scanning in reverse, the input terminal is connected to the gate drive signal output terminal of the adjacent next-stage shift register unit, and the reset terminal is con...

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Abstract

The invention provides a shifting register unit and a drive method thereof, a gate drive circuit and a display device. The shifting register unit comprises an input module, a reset module, a pull-down node control module, a memory module, a gate drive signal output module and a pull-up node potential maintenance module, wherein the pull-up node potential maintenance module is connected with a gate drive signal output end and a pull-up node separately and is used for maintaining the potential of the pull-up node at a high level when the gate drive signal output end outputs the high level. Through the feedback effect of a gate drive signal, the potential of the pull-up node in the shifting register unit is controlled and compensated, thereby achieving stable output of the gate drive signal and ensuring normal display.

Description

technical field [0001] The present invention relates to the technical field of display driving, in particular to a shift register unit, a driving method thereof, a gate driving circuit and a display device. Background technique [0002] At present, the gate drive technology using the principle of shift register is widely used. Realizing gate drive through circuit units can not only save space, realize narrow frame design, but also reduce bonding process, save cost, and improve yield and production capacity. [0003] However, the stability of the gate drive circuit is a key factor to achieve normal display. Since the gate drive circuit is composed of basic shift register units cascaded, the output signal of the basic shift register unit is controlled by the pull-up node PU and clock signal CLK, signal noise and TFT (Thin Film Transistor, thin film transistor) leakage current may all cause wrong output of the shift register unit. Contents of the invention [0004] The main ...

Claims

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Application Information

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IPC IPC(8): G09G3/20G11C19/28
CPCG09G3/20G09G2310/0286G11C19/28G09G3/3266G09G2310/0267G11C19/184G09G5/10
Inventor 孙丽陶健李红敏
Owner BOE TECH GRP CO LTD
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