CN114942707B

CN114942707B - Touch display screen for improving stability of GIP (gate-in-plane) driving circuit

Info

Publication number: CN114942707B
Application number: CN202210640401.8A
Authority: CN
Inventors: 王强; 阮丽莹
Original assignee: Fujian Huajiacai Co Ltd
Current assignee: Fujian Huajiacai Co Ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2024-05-10
Anticipated expiration: 2042-06-08
Also published as: CN114942707A

Abstract

A touch display screen that promotes GIP drive circuit stability, comprising: a display area for displaying an image and a non-display area surrounding the display area; a display area, comprising: the touch sensing device comprises a plurality of touch sensing areas, a plurality of first transistors and a plurality of second transistors, wherein each touch sensing area comprises a plurality of pixels, and each pixel is provided with a first transistor; a non-display area comprising: the plurality of GIP driving circuits are connected through polar transmission line circuits; each GIP driving circuit is provided with a second transistor; a drain output line of the non-display region second transistor is connected to a gate line gateline of the first transistor of the display region; the drain output line of the second transistor bypasses an ESD prone location, which is a GE layer at the GIP driving circuit opposite to the tip of the gate line gateline. The invention avoids the loss caused by ESD by changing the routing mode of the GIP output signal.

Description

Touch display screen for improving stability of GIP (gate-in-plane) driving circuit

Technical Field

The invention belongs to the technical field of touch display screens, and particularly relates to a touch display screen capable of improving the stability of a GIP driving circuit.

Background

In recent years, the touch screen display market has come into product diversification at present, from small-size mobile phones to medium-and large-size NB, flat panel, vehicle-mounted or even IT products. Along with the rapid development and application of information technology, wireless mobile communication and information home appliances, the dependence of people on electronic products is increasing, and the rapid development of various display technologies and display devices is brought. The flat panel display device has the characteristics of complete planarization, light weight, thinness, power saving and the like, and thus has been widely used.

The resolution of the current touch screen products has an increasing trend, from the conventional 720p to 1080p in the early years, to the current 2K or even 4K, the GIP level is correspondingly increased, and therefore the level transmission stability of the GIP is more and more important. In order to reduce the manufacturing cost of the flat panel display device and achieve the purpose of a narrow frame, GIP (gate panel) technology is generally adopted in the manufacturing process, and a gate driving circuit (i.e., GIP circuit) is directly integrated on the flat panel display panel. The flat panel display panel generally includes a display area for displaying an image and a non-display area surrounding the display area, and the GIP driving circuit is generally disposed in the non-display area, as shown in fig. 1, wherein the circled portion is an output terminal trace portion of the GIP driving circuit.

Fig. 2 is a schematic diagram of a GIP output terminal routing structure in the prior art, in which GE and SD are metal layers, SE is a semiconductor, it can be seen that a drain output terminal routing of T4 in a GIP circuit needs to be connected to a gate line gateline of a display area across the metal lines, gateline is a GE metal layer, a level transmission line (each GIP driving circuit module is connected through the level transmission line) is also a GE metal layer, and GI, SE and DC processes are also provided between the GE process and the SD process, static electricity is accumulated on the GE layer during the three processes, particularly, the gate line gateline in the display area spans the whole display area, a large amount of static electricity is easily accumulated, and ESD (electrostatic) explosion is easily generated at two ends of the gate line gateline. In fig. 3, black dots are positions of ESD vulnerable points of two edge GE endpoints, the first black dot is a position where an adjacent level transmission line is connected with the current level output end trace, and the adjacent level transmission line is a GE layer, which has the risk of ESD occurrence with gateline; the second black spot is the location where the short is intended, and the ESD burn does not affect the short. As can be seen from a comparison of fig. 4 and fig. 5, in the position of ESD blast, GI layer burst through above GE layer exposes GE layer, and when SD forms film, GE and SD are shorted, resulting in short circuit between GIP output signal of the stage and adjacent transmission line, which affects output.

Disclosure of Invention

The invention aims to provide a touch display screen for improving the stability of a GIP driving circuit.

The invention is realized in the following way:

a touch display screen that promotes GIP drive circuit stability, comprising: a display area for displaying an image and a non-display area surrounding the display area;

the display area includes: a plurality of touch sensing areas, wherein each touch sensing area comprises a plurality of pixels, and each pixel is provided with a first transistor;

The non-display area includes: the plurality of GIP driving circuits are connected through polar transmission line circuits; each GIP driving circuit is provided with a second transistor;

a drain output line of the non-display region second transistor is connected to a gate line gateline of the first transistor of the display region;

the drain output line of the second transistor bypasses an ESD prone location, which is a GE layer at the GIP driving circuit opposite to the tip of the gate line gateline.

Further, the first transistor of the touch sensing area is a TFT transistor.

Further, the second transistor in the GIP driving circuit is a TFT transistor.

The invention has the advantages that: through changing the routing mode of the GIP output signal, the loss caused by ESD is avoided, the drain electrode drain end of the second transistor is a GIP output end, the signal line of the output end must be connected to the grid line gateline of the display area, the routing of the signal line of the output end bypasses the position of easy occurrence of ESD (the position of easy occurrence of ESD is a GE layer at the GIP position opposite to the tip end of the grid line gateline), and when the ESD occurs, the condition that the short circuit between GE and SD occurs when the SD does not pass through the GI hole is avoided, so that the stable output of the GIP is an important safeguard measure.

Drawings

The invention will be further described with reference to the accompanying drawings, in conjunction with examples.

Fig. 1 is a schematic structural diagram of a touch display screen.

Fig. 2 is a schematic diagram of a GIP output terminal routing structure in the prior art.

Fig. 3 is a schematic diagram of an ESD vulnerable point of the GIP output terminal trace portion.

FIG. 4 is a schematic diagram of a normal film formation structure of the trace portion of the GIP output terminal at AA' in FIG. 2.

FIG. 5 is a schematic view of the structure of the ESD burn-in film at the trace portion of the GIP output terminal at AA' in FIG. 2.

Fig. 6 is a schematic diagram of a GIP output routing structure according to the present invention.

FIG. 7 is a schematic diagram of a normal film formation structure of the trace portion of the GIP output terminal at AA' in FIG. 6.

FIG. 8 is a schematic diagram of a GIP hole forming structure at the GIP output terminal trace portion of AA' in FIG. 6.

Detailed Description

As shown in fig. 3 to 8, a touch display screen for improving stability of a GIP driving circuit includes: a display area for displaying an image and a non-display area surrounding the display area;

The display area includes: a plurality of touch sensing areas, each of the touch sensing areas including a plurality of pixels, each of the pixels having a first transistor (not shown), the first transistor being a TFT transistor;

the non-display area includes: the plurality of GIP driving circuits are connected through polar transmission line circuits; each of the GIP driving circuits is provided with a second transistor 1, and the second transistor 1 is a TFT transistor.

The drain output line of the non-display area second transistor 1 is connected to the gate line gateline-2 of the first transistor of the display area;

as shown in fig. 6, the drain output line of the second transistor 1 bypasses the ESD vulnerable site, which is the GE layer at the GIP driving circuit opposite to the tip of the gate line gateline. As can be seen from a comparison of fig. 7 and 8, ESD blast would bypass GI layer burst through above GE layer, but no shorting problem occurs because the GIP output line of the present invention at this location has been bypassed.

According to the invention, the loss caused by ESD is avoided by changing the routing mode of the GIP output signal, the drain electrode drain end of the second transistor 1 is the GIP output end, the signal line of the output end is connected to the grid line gateline of the display area, the routing of the signal line of the output end bypasses the ESD easy-occurrence position (the ESD easy-occurrence position is a GE layer at the GIP position opposite to the tip end of the grid line gateline), and the condition that GE and SD short circuits are not generated when SD passes through the GI hole when ESD occurs is avoided, so that the invention is an important safeguard measure for ensuring the stable output of the GIP.

The foregoing is merely exemplary of the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a promote touch-control display screen of GIP drive circuit stability which characterized in that: comprising the following steps: a display area for displaying an image and a non-display area surrounding the display area;

a drain output line of the non-display region second transistor is connected to a gate line of the first transistor of the display region;

The drain output line of the second transistor bypasses an ESD (electro-static discharge) easy occurrence position which is a GE layer at the GIP driving circuit opposite to the tip of the gate line.

2. The touch display screen for improving stability of GIP driving circuit as claimed in claim 1, wherein: the first transistor of the touch sensing area is a TFT transistor.

3. The touch display screen for improving stability of GIP driving circuit as claimed in claim 1, wherein: the second transistor in the GIP driving circuit is a TFT transistor.