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

A technology for shifting register units and voltages, which is applied in the field of gate drive circuits and display devices, shift register units and their drives, and can solve problems such as poor GOA drive stability and affecting the yield of display panels, so as to avoid mutual competition, Improve the effect of poor stability and improve yield

Active Publication Date: 2019-05-28
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current GOA circuit has the problem that the pull-up node PU and the pull-down node PD compete with each other (that is, the two influence each other), resulting in poor stability of the GOA drive and affecting the yield of the display panel.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] figure 1 The functional block diagram of the shift register unit provided for Embodiment 1 of the present invention; please refer to figure 1 The shift register unit provided in this embodiment includes an input module 1, an input terminal Out_N-1, an output module 2, an output terminal Out_N, a first clock terminal CKBL, a first reset module 3, a second reset module 4, and a pull-down module 5 , the second clock terminal CLK, the first storage module 6, the pull-up node PU, the pull-down node PD and the interval module 7; wherein:

[0051] The input module 1 is connected to the input terminal Out_N-1, the first voltage terminal CN and the pull-up node PU, and is used to provide the signal of the first voltage terminal CN to the pull-up node when the input terminal Out_N-1 inputs a valid signal PU.

[0052] The output module 2 is connected with the pull-up node PU and the first clock terminal CKBL, and is used for outputting the signal on the first clock terminal CKBL...

Embodiment 2

[0078] Figure 5 For the flowchart of the driving method of the shift register unit provided by Embodiment 2 of the present invention, please refer to Figure 5 , the driving method of the shift register unit includes the following steps:

[0079] S11, input stage: the input terminal inputs a valid signal, and the voltage of the first voltage terminal is provided to the pull-up node to charge the pull-up node; the pull-up node is a valid signal, so that the pull-down node and the second voltage terminal are turned on to charge the pull-down node discharge.

[0080] S12, output stage: the pull-up node is floating, and the first storage module is bootstrapped; the pull-up node is a valid signal so that the signal on the first clock terminal is provided to the output terminal; the pull-down node is kept discharging.

[0081] S13, the first reset stage: a valid signal is input to the reset terminal, so that both the pull-up node and the output terminal are connected to the secon...

Embodiment 3

[0086] An embodiment of the present invention further provides a gate driving circuit, which includes a plurality of cascaded shift register units, and the shift register units are the shift register units described in Embodiment 1 above. The composition and driving method of the shift register unit have been described in detail in the above-mentioned embodiment 1 and embodiment 2 respectively. For details, please refer to the content in the above-mentioned embodiment 1 and embodiment 2, and will not be repeated here.

[0087] Wherein, the gate driving circuit may be an N-type gate driving circuit, or a P-type gate driving circuit.

[0088] By using the shift register unit in the gate drive circuit, the stability of the GOA drive can be improved, which is beneficial to improve the yield rate of the display panel.

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Abstract

The invention provides a shift register unit, the input module thereof is connected with the input terminal, the first voltage terminal and the pull-up node; the output module is connected with the pull-up node and the first clock terminal; the first storage module is connected with the two ends respectively connected to the pull-up node and the output terminal; the first reset module is connected to the reset terminal, the second voltage terminal and the pull-up node; the second reset module is connected to the second clock terminal and the pull-down node; the pull-down module is connected to the pull-down node, The second voltage terminal is connected to the output terminal; the spacer module is connected to the pull-up node, the pull-down node and the second voltage terminal. The invention also provides a driving method of the shift register unit, a gate driving circuit and a display device. The shift register unit and its driving method, the gate driving circuit and the display device can prevent the pull-up node and the pull-down node from competing with each other, thereby improving the poor stability of GOA driving and improving the yield rate of the display panel.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a shift register unit, a driving method thereof, a gate driving circuit and a display device. Background technique [0002] With the continuous development of liquid crystal display (Liquid Crystal Display, referred to as LCD) display technology and the increasingly fierce market trend, the improvement of the technical capability and performance quality of the array substrate gate driver (Gate Driver on Array, referred to as GOA) has become particularly important. Urgently, the stability of GOA is a key consideration in the technical barriers of GOA circuit performance. However, the current GOA circuit has the problem that the pull-up node PU and the pull-down node PD compete with each other (that is, the two interact with each other), which results in poor stability of GOA driving and affects the yield of the display panel. Contents of the invention [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G11C19/28
CPCG09G3/3674G11C19/28G09G2310/0286G09G3/20G09G2310/08G11C19/287
Inventor 张洁樊君
Owner BOE TECH GRP CO LTD
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