Shift register unit, gate drive circuit and display device

A shift register and gate technology, which is applied in the fields of shift register units, gate drive circuits and display devices, can solve the problems of rapid aging and shortened service life, and achieve the effects of improving service life, narrowing panel frame and reducing cost.

Active Publication Date: 2015-12-09
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] From the above description, it can be found that the gate of the pull-down transistor is in a high level state for a long time, which will cause the pull-down transistor to age faster than other transistors in the shift register unit, shortening the service life of the product

Method used

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  • Shift register unit, gate drive circuit and display device
  • Shift register unit, gate drive circuit and display device
  • Shift register unit, gate drive circuit and display device

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Embodiment Construction

[0041] In the shift register unit, the gate drive circuit, and the display device of the embodiments of the present invention, the pull-down unit corresponding to each pull-down node (the output node of the current stage and the pull-up node) includes at least two TFTs, so that the pull-down node When it needs to be controlled by a low-level signal, at least two TFTs included in the pull-down unit can be turned on in turn, output a low-level signal to the node to be pulled down, and reduce the TFT gate in the pull-down unit. time, slow down the aging speed of the TFT in the pull-down unit, and improve the service life of the entire shift register unit.

[0042] Before further describing the embodiments of the present invention in detail, the concepts involved in the embodiments of the present invention are described as follows.

[0043] Taking the nth stage shift register unit as an example, its working process is as follows, which is generally divided into the following four ...

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Abstract

A shift register unit, a grid drive circuit and a display device. The shift register unit has a capacitor unit (C), an end of the capacitor unit (C) being connected to a current-stage output node (OUTPUT), and the other end thereof being connected to a pull-up node (PU). The shift register unit also comprises a first pull-down unit and a second pull-down unit, the first pull-down unit comprising at least two first transistors (T2, T6 and T7), and the second pull-down unit comprising at least two second transistors (T3, T4 and T5). When the current-stage output node (OUTPUT) is in a pull-down stage, the at least two first transistors (T2, T6 and T7) are in a conductive state under the control of respective corresponding control signals in turn to output a low-level signal in turn to the current-stage output node (OUTPUT); and when the pull-up node (PU) is in a pull-down stage, the at least two second transistors (T3, T4 and T5) are in a conductive state under the control of respective corresponding control signals in turn to output a low-level signal in turn to the pull-up node (PU).

Description

technical field [0001] The invention relates to a shift register technology, in particular to a shift register unit, a gate drive circuit and a display device. Background technique [0002] The integrated gate shift register integrates the gate pulse output register on the panel, which saves IC and reduces the cost. There are many ways to realize the integrated gate shift register, which can contain different transistors and capacitors. The commonly used structures are 12T1C, 9T1C, 13T1C and so on. [0003] Generally speaking, a shift register is composed of multi-level shift register units, and each level of shift register units only outputs a high-level signal in a very short time, and outputs a low-level signal at other times. Usually VSS signal. [0004] Prior art shift registers have at least the disadvantage of a relatively low product life, which is explained below. [0005] As mentioned above, the shift register unit of each stage only outputs a high-level signal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/36G11C19/28
CPCG09G3/20G09G2310/0286G11C19/28
Inventor 吴博祁小敬聂磊森
Owner BOE TECH GRP CO LTD
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