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

A technology of a shift register and a control unit, which is applied in the fields of gate drive circuits and display devices, shift registers, and shift register units, can solve the problems of increasing device power consumption, insufficient pull-down shutdown, and device damage, etc. The effect of reducing power consumption, avoiding instantaneous high current, and protecting devices

Active Publication Date: 2018-03-27
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] That is to say, during the charging phase, T4 and T5 will be in the conduction state at the same time, and the introduction of a high-level signal will inevitably lead to the problem of insufficient pull-down shutdown
At the same time, the simultaneous conduction of T4 and T5 will form a loop through the CKB node (currently output high-level signal) and VGL node (currently output low-level signal), and the CKB node will discharge the VGL node to generate an instantaneous large current, increasing increase the power consumption of the device, and may also cause damage to the device

Method used

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

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Embodiment Construction

[0048] In a specific embodiment of the present invention, the signal output to the pull-down node is guaranteed to be a high-level or low-level signal during the charging phase, so as to avoid various problems caused by simultaneously outputting a high-level signal and a low-level signal to the PD point .

[0049] 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, so as to better understand the embodiments of the present invention.

[0050] Taking a certain level of shift register unit as an example, combined with figure 1 and figure 2 As shown, its working process generally includes the following four stages:

[0051] In stage A (charging stage), the output node of the upper stage outputs a high level, and the level of the PU is initially pulled up by charging the first capacitor structure (also called a bootstrap capacitor structure);

[0052] In stage B (...

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PUM

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Abstract

A shift register unit, a shift register, a gate driving circuit and a display device are discloses. The shift register unit has an output node Out(n) of a current stage, a pull-up node PU and a pull-down node PD, and the shift register unit includes a first capacitor module C1, a pull-down module and a pull-down control module, and the pull-down control module is configured to output one of a high level signal and a low level signal to the pull-down node (PD) in accordance with a current operating phase.

Description

technical field [0001] The invention relates to a shift register technology, in particular to a shift register unit, a shift register, a gate drive circuit and a display device. Background technique [0002] Such as figure 1 Shown is a schematic diagram of a common shift register unit, which includes a pull-up transistor T10, which is responsible for using a high-level signal ( figure 1 where is the high-level signal output by the output node OUT(n-1) of the upper stage, but not limited to this), pulls up the potential of the pull-up node PU, and charges the first capacitor module C1 to maintain The conduction of the output transistor T1 outputs a high level signal ( figure 1 Middle is the high-level signal output by the CK node). Both the PU and the output node OUT(n) of the current stage need to be kept at a low level in the subsequent reset phase and maintenance phase. [0003] In order to ensure that PU and the output node OUT(n) of the current stage output low-level...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G11C19/28
CPCG11C19/182G09G3/32G09G3/3266G09G3/3677G09G2310/0243G09G2310/0267G09G2310/0286G11C19/184G11C19/28
Inventor 青海刚
Owner BOE TECH GRP CO LTD
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