Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

A shift register unit and voltage technology, which is applied to gate drive circuits and display devices, shift register units and their driving fields, can solve the problems affecting the yield rate of display panels, poor GOA driving stability, etc., to avoid mutual competition, The effect of improving poor stability and improving yield

Active Publication Date: 2017-07-14
BOE TECH GRP CO LTD +1
View PDF7 Cites 6 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shift register unit and driving method thereof, gate driving circuit and display device
  • Shift register unit and driving method thereof, gate driving circuit and display device
  • Shift register unit and 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 in 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a shift register unit, which comprises an input module, an output module, a first storage module, a first reset module, a second reset module, a pull-down module and an interval module, wherein the input module is connected with an input end, a first voltage end and a pull-up node; the output module is connected with the pull-up node and a first clock end; both ends of the first storage module are connected with the pull-up node and the output end separately; the first reset module is connected with a reset end, a second voltage end and the pull-up node; the second reset module is connected with a second clock end and a pull-down node; the pull-down module is connected with the pull-down node, the second voltage end and the output end; and the interval module is connected with the pull-up node, the pull-down node and the second voltage end. The invention further provides a driving method of the shift register unit, a gate driving circuit and a display device. The shift register unit, the driving method thereof, the gate driving circuit and the display device can avoid competition between the pull-up node and the pull-down node, thereby being capable of improving the stability of a GOA, and being conductive to increasing the yield rate of display panels.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G09G3/36G11C19/28
CPCG09G3/3674G11C19/28G09G2310/0286G09G3/20G09G2310/08G11C19/287
Inventor 张洁樊君
Owner BOE TECH GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com