Scan signal line driving circuit and display device including same

A technology for scanning signal lines and driving circuits, which is applied in information storage, static indicators, electrical digital data processing, etc., and can solve problems such as unstable operation, abnormality, and leakage current (increased turn-off leakage current) of the gate driver

Active Publication Date: 2019-07-23
SHARP KK
View PDF12 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the threshold voltage of a thin film transistor in a unit circuit is low, leakage current (off leakage current) generated when the thin film transistor is in an off state may increase
If such leakage current increases, the operation of the gate driver becomes unstable, causing abnormal operation

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
  • Scan signal line driving circuit and display device including same
  • Scan signal line driving circuit and display device including same
  • Scan signal line driving circuit and display device including same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0082]

[0083] Figure 4 It is a block diagram for explaining the schematic structure of the gate driver 200 in this embodiment. The gate driver 200 in this embodiment is disposed on one end side of the display unit 400 ( Figure 4 The shift register 210L on the left side in ) and the other end side of the display unit 400 ( Figure 4 The shift register 210R on the right side of ) is constituted. There are i gate bus lines GL( 1 )˜GL(i) disposed in the display unit 400 , the shift register 210L drives the odd-numbered row gate bus lines GL, and the shift register 210R drives the even-numbered row gate bus lines GL. That is, in the present embodiment, the gate bus lines GL( 1 ) to GL(i) are driven by a driving method called “comb-tooth driving” or “staggered driving”.

[0084] The shift register 210L is composed of p unit circuits 2L( 1 ) to 2L(p), and the shift register 210R is composed of p unit circuits 2R( 1 ) to 2R(p). P is i / 4. It should be noted, Figure 4 In th...

no. 2 approach

[0140]

[0141] Figure 14 It is a block diagram for explaining the schematic structure of the gate driver 200 in this embodiment. Like the first embodiment, the gate driver 200 in this embodiment also includes a shift register 210L disposed at one end of the display unit 400 and a shift register 210R disposed at the other end of the display unit 400 . In this embodiment, the difference from the first embodiment is that each of the gate bus lines GL( 1 ) to GL(i) is driven by both the shift register 210L and the shift register 210R. That is, each of the gate bus lines GL( 1 ) to GL(i) is driven from both the one end side and the other end side.

[0142] The shift register 210L is composed of p unit circuits 2L( 1 ) to 2L(p), and the shift register 210R is composed of p unit circuits 2R( 1 ) to 2R(p). P is i / 2. As in the first embodiment, each unit circuit 2 is connected to two gate bus lines GL.

[0143]

[0144] Figure 15 It is a block diagram showing the configurat...

no. 3 approach

[0161] Figure 19 It is a block diagram for explaining the schematic structure of the gate driver 200 in this embodiment. The gate driver 200 in this embodiment is constituted by a shift register 210 disposed on one end side of the display unit 400 . The shift register 210 is composed of p unit circuits 2(1) to 2(p). P is i / 2. Each unit circuit 2 is connected to two gate bus lines GL.

[0162] Depend on Figure 14 and Figure 19 It can be seen that in the second embodiment, each of the gate bus lines GL(1) to GL(i) is driven from both the one end side and the other end side, but in this embodiment, each gate bus line GL(1) to GL (i) Driven by only one end side. The second embodiment differs from the present embodiment only in this point, and therefore descriptions of the configuration of the shift register, the configuration of the unit circuit, and the operation of the gate driver are omitted.

[0163] In addition, regarding measures against charge leakage, in the pres...

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 present invention provides a gate driver (scanning signal line driving circuit), which is capable of suppressing an increase in the size of a frame and halfway stopping scanning (a gate driver fora display device provided with a touch panel). Each unit circuit includes a thin film transistor (first stabilization transistor) having a gate terminal to which a clear signal which goes to an on level when a frame period ends applied, a drain terminal connected to a charge holding node, and a source terminal to which a potential of an off level is applied. Here, a gate length of the thin film transistor is set to be larger than gate lengths of other charge holding node turn-off transistors. Alternatively, a multi-gate structure is adopted for the thin film transistor and a single gate structure is adopted for the other charge holding node turn-off transistors.

Description

technical field [0001] The following disclosure relates to a scanning signal line driving circuit for driving gate bus lines (scanning signal lines) disposed on a display portion of a display device, and particularly relates to a scanning signal line driving circuit provided in a display device including a touch panel. Background technique [0002] Conventionally, there is known an active matrix liquid crystal display device including a display section including a plurality of source bus lines (video signal lines) and a plurality of gate bus lines (scanning signal lines). In such a liquid crystal display device, currently, a gate driver (scanning signal line driver circuit) for driving a gate bus line is often mounted as an IC (Integrated Circuit) chip on a peripheral portion of a substrate constituting a liquid crystal panel. However, in recent years, in order to narrow the frame, the gate driver has been directly formed on the TFT substrate, which is one of the two glass s...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3674G06F3/0416G09G3/3677G09G2310/0286G11C19/28G06F3/0412
Inventor 田川晶渡部卓哉岩濑泰章楠见崇嗣竹內洋平
Owner SHARP KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap