CN113342203A

CN113342203A - Touch module and touch display device

Info

Publication number: CN113342203A
Application number: CN202110649912.1A
Authority: CN
Inventors: 黄昱铭
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; Yecheng Optoelectronics Wuxi Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; Yecheng Optoelectronics Wuxi Co Ltd; General Interface Solution Ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-09-03

Abstract

The application relates to the technical field of display, and the embodiment of the application provides a touch module and a touch display device. The touch display device comprises the touch module and a display module, wherein the touch module is coupled to one side of the display module. Through set up the insulating layer on the wiring district to set up the static inoxidizing coating on the insulating layer, make the static inoxidizing coating area can the grow, thereby make the static inoxidizing coating reach littleer resistance, both can replace the peripheral earth connection of original circuit district and realize letting out static, can also reduce the required area of the peripheral earth connection of original circuit district, obtain the touch-control module that a frame reduces.

Description

Touch module and touch display device

Technical Field

The present application relates to the field of display technologies, and in particular, to a touch module and a touch display device.

Background

In the related art, when designing a touch module, a ground line is usually designed at an outer ring of the touch module as a rendering path for electrostatic protection. However, when a ground line with a large line width is added to the design, the frame areas on both sides of the touch module are greatly increased, and the competitiveness of the narrow-frame product is reduced. If a narrow frame product is obtained, the space between the ground line and the routing area is inevitably reduced under the condition of the same line width as the above line width, and the situation that the routing area line on the touch module is damaged by flashover due to electrostatic discharge is easily caused.

Disclosure of Invention

Accordingly, it is desirable to provide a touch module and a touch display device, which can reduce the frame area on the basis of implementing electrostatic protection.

According to a first aspect of the present application, an embodiment of the present application provides a touch module, including:

the non-touch area comprises a wiring area surrounding the touch area and a binding area separated from the touch area by the wiring area;

the insulating layer is arranged on the first surface of the substrate, and the orthographic projection of the insulating layer on the first surface is positioned in the wiring area; and

and the electrostatic protection layer is at least partially covered on the insulating layer and is applied with the grounding potential to form an electrostatic protection pattern surrounding the touch area.

In one embodiment, the non-touch area further includes a landing area independent from the routing area and the binding area;

the touch module comprises a first grounding pad arranged in the lap joint area;

the electrostatic shield overlaps the first ground pad to be applied with a ground potential.

In one embodiment, the area of the overlap between the electrostatic protection layer and the first ground pad is at least 1 mm.

In one embodiment, the touch module comprises a second grounding pad arranged in the binding area;

the electrostatic shield overlaps the second ground pad to be applied with a ground potential.

In one embodiment, the area of the overlap between the electrostatic protection layer and the second ground pad is at least 1 mm.

In one embodiment, the touch module further comprises a frame, wherein the frame is configured to have fixing positions for clamping and fixing two opposite ends of the substrate;

a grounding conducting layer is arranged on the inner wall of the fixing position;

the grounding conductive layer is in contact with the static protection layer.

In one embodiment, an orthographic projection of the grounding conductive layer on the first surface falls within a range of an orthographic projection of the insulating layer on the first surface.

In one embodiment, the ground conductive layer is a metal layer.

In one embodiment, the insulating layer is a silicon dioxide layer.

In one embodiment, the electrostatic protection layer is a silver paste conductive layer.

According to a second aspect of the present application, an embodiment of the present application provides a touch display device, including:

the touch module is provided with a touch control module; and

the touch control module is coupled to one side of the display module.

Among the touch-control module and touch-control display device that above-mentioned provided, the touch-control module includes the base plate at least, insulating layer and static inoxidizing coating, the base plate has touch-control district and non-touch-control district, non-touch-control district is including walking the line district and binding the district, through set up the insulating layer on walking the line district, and set up the static inoxidizing coating on the insulating layer, make static inoxidizing coating area can grow, thereby make the static inoxidizing coating reach littleer resistance, both can replace original circuit district peripheral earth connection and realize leaking static, can also reduce the required area of original circuit district peripheral earth connection, obtain the touch-control module that a frame reduces.

Drawings

Fig. 1 is a schematic structural diagram of a touch module in an embodiment of the related art;

fig. 2 is a schematic structural diagram of a touch module according to an embodiment of the present disclosure;

FIG. 3 is a schematic side view of the touch module shown in FIG. 2;

fig. 4 is a schematic structural diagram of a touch module according to another embodiment of the present disclosure;

fig. 5 is a schematic side view of a touch module according to another embodiment of the present disclosure.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the present application. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. The embodiments of this application can be implemented in many different ways than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the invention and therefore the embodiments of this application are not limited to the specific embodiments disclosed below.

It is to be understood that the terms "first," "second," and the like as used herein may be used herein to describe various terms of art, and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features being indicated. However, these terms are not intended to be limiting unless specifically stated. These terms are only used to distinguish one term from another. For example, the first and second ground pads are different ground pads without departing from the scope of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely below the second feature, or may simply mean that the first feature is at a lesser level than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

To facilitate understanding of technical solutions of the embodiments of the present application, before describing specific embodiments of the present application, some technical terms in the technical field to which the embodiments of the present application belong are briefly explained.

ESD (Electro-Static Discharge), also known as electrostatic Discharge, can cause damage to electronic devices or integrated circuit systems due to Electrical Over Stress (EOS). Static electricity is usually generated in the processes of production, assembly, testing, storage, transportation and use, and is accumulated in human bodies, instruments or equipment, even static electricity is accumulated in electronic components, and the static electricity is usually very high in instantaneous voltage (more than several kilovolts), so that the electronic components or an integrated circuit system are damaged by static electricity discharge instantaneously.

ITO (Indium Tin Oxide) conductive glass is manufactured by plating a layer of Indium Tin Oxide (commonly called ITO) film on soda-lime-based or silicon-boron-based substrate glass by a magnetron sputtering method. The ITO conductive glass special for the liquid crystal display is also coated with a silicon dioxide barrier layer before the ITO layer is coated, so that sodium ions on the substrate glass are prevented from diffusing into liquid crystals in the cell. The special ITO glass for the high-grade liquid crystal display is subjected to polishing treatment before an ITO layer is sputtered, so that more uniform display control is obtained. The ITO glass substrate special for the liquid crystal display generally belongs to super-float glass, and all film coating surfaces are float tin surfaces of the glass.

In recent years, touch screens have been rapidly developed as one of important products for realizing human-computer interaction. Touch screens are generally installed on electronic devices, such as mobile phones, and the like, and the screen body of the touch screen often rubs against clothes and the like, so that static charges are carried on the surface of the screen body. The capacitive touch screen realizes a touch function through an electric effect, so that the capacitive touch screen is sensitive to the electric effect on the surface of the screen body, once the surface of the screen body is provided with static charges and cannot be removed in time, touch deviation can be generated, touch points cannot be accurately captured, and the normal work of the touch screen is influenced.

As described in the background, in the related art, when designing a touch module, a ground line is usually designed at an outer ring of the touch module as a rendering path for electrostatic protection. However, when a ground line with a large line width is added to the design, the frame areas on both sides of the touch module are greatly increased, and the competitiveness of the narrow-frame product is reduced. If a narrow frame product is obtained, the space between the ground line and the routing area is inevitably reduced under the condition of the same line width as the above line width, and the situation that the routing area line on the touch module is damaged by flashover due to electrostatic discharge is easily caused.

Fig. 1 is a schematic structural diagram of a touch module in an embodiment of the related art. As shown in fig. 1, the touch module in one embodiment of the prior art includes a substrate 10 and a ground line 20, the ground line 20 is disposed around a routing area 11, and the routing area 11 is disposed around a touch area 12. The inventor of the present application has found that, in the embodiment, the ground line 20 is disposed around the wiring area 11, the ground line 20 and the wiring area 11 are located on the same plane, and in order to reduce the area of the frame region, a manner of reducing the distance between the ground line 20 and the wiring area 11 is generally adopted, but this manner is likely to cause a flashover to damage the wiring of the wiring area 11 during the electrostatic discharge process. Therefore, it is desirable to provide a touch module capable of reducing a frame area on the basis of realizing electrostatic protection.

Fig. 2 is a schematic structural diagram of a touch module according to an embodiment of the present disclosure; fig. 3 is a schematic side view of the touch module shown in fig. 2.

Referring to fig. 2 and 3, a touch module according to an embodiment of the present invention includes a substrate 100, an insulating layer 200, and an electrostatic protection layer 300.

The substrate 100 has a touch area 110 and a non-touch area 120, the touch area 110 corresponds to a screen portion (display area) of the display screen, the non-touch area 120 corresponds to a frame portion (non-display area) of the display screen, and the non-touch area 120 includes a routing area 121 surrounding the touch area 110 and a binding area 122 spaced apart from the touch area 110 by the routing area 121.

The insulating layer 200 is disposed on a first surface of the substrate 100, and an orthographic projection of the insulating layer 200 on the first surface is located in the routing area 121. Note that the first surface of the substrate 100 is referred to as a drive (Tx) side 101. In some embodiments, the insulating layer 200 may be a resin insulating layer, may also be a silicon dioxide layer, or may also be formed by adding a silicon dioxide filler to the resin insulating layer, so as to achieve reliability of connection with the electrostatic protection layer 300, which is not specifically limited in this embodiment of the present invention.

The electrostatic protection layer 300 at least partially covers the insulating layer 200 and is applied with a ground potential to form an electrostatic protection pattern surrounding the touch area 110, so that the electrostatic protection layer 300 is isolated from the routing area 121 by the insulating layer 200. As an embodiment, the static electricity shield layer 300 may be provided in the form of a line such as the ground line 20 coated on the insulating layer 200. In order to obtain better electrostatic protection effect, in another embodiment, the electrostatic protection layer 300 may be disposed in a region having a certain area, for example, an area of an orthographic projection of the electrostatic protection layer 300 on the first surface may be smaller than or equal to an area of an orthographic projection of the insulating layer 200 on the first surface, or in the embodiment shown in fig. 2, the electrostatic protection layer 300 partially overlies the insulating layer 200 and partially overlies the non-wiring region on the non-touch region 120. The electrostatic shield 300 is separated from the routing area 121 by the insulating layer 200, so that the area where the electrostatic shield 300 can be disposed can be enlarged, thereby achieving a smaller resistance of the electrostatic shield 300. Since static electricity is easily discharged toward a direction of lower resistance, the probability of the line in the line region 12 being damaged by a flashover can be reduced for the static electricity protection layer 300 having a smaller resistance. Therefore, under the design, static electricity can be discharged instead of the peripheral grounding wire 20 of the original circuit area, the area required by the peripheral grounding wire 20 of the original circuit area can be reduced, and the touch module with the reduced frame is obtained.

It is understood that, in order to achieve a good electrostatic protection effect, as an embodiment, the electrostatic protection layer 300 is disposed around the touch area 110. In some embodiments, the electrostatic shield layer 300 may be a single layer or a multi-layer structure. For example, the electrostatic protection layer 300 may be etched into a plurality of transparent conductive electrodes, which is known to those skilled in the art and is not the key point of the protection of the embodiments of the present application, and the description of the embodiments of the present application is omitted, or as shown in fig. 3, the electrostatic protection layer 300 is a single-layer structure.

Optionally, the Touch module provided in the above embodiments may be applied to an Out-cell Touch panel, where the Touch circuit is first fabricated on a protective glass, then bonded with an adhesive, and then placed on a front glass. For panels fabricated in this manner, routing areas on both the drive (Tx) side 101 and the sense (Rx) side 102 of the substrate 100 can be added simultaneously to meet narrow-frame design requirements.

In some embodiments, the electrostatic shield 300 may be ITO (Indium Tin Oxide) conductive glass. In order to avoid the excessive process flow involved in manufacturing the ITO conductive glass, in other embodiments, the electrostatic protection layer 300 may be formed by a metal material, such as chromium (Cr), tantalum (Ta), titanium (Ti), or a metal alloy of one or more of the above metals, to form a single-layer wire, but the electrostatic protection layer 300 may also be a multi-layer structure, such as a multi-layer structure formed by titanium/copper (Ti/Cu), titanium/aluminum (Ti/Al), titanium/copper/titanium (Ti/Cu/Ti), titanium/aluminum/titanium (Ti/Al/Ti), molybdenum/aluminum/titanium (Mo/Al/Ti). As an embodiment, the electrostatic protection layer 300 is configured as a silver paste conductive layer to obtain good conductivity and achieve better electrostatic discharge effect. In this embodiment, since the routing area 121 on the substrate 100 surrounds the touch area 110, that is, the routing area 121 is at the periphery of the visible area, the electrostatic protection layer 300 made of metal has no influence. Meanwhile, compared with the electrostatic protection layer 300 made of ITO conductive glass, the electrostatic protection layer 300 made of metal has lower resistance and high cost performance, and is more beneficial to large-area use and achieves better electrostatic protection performance.

Fig. 4 is a schematic structural diagram of a touch module according to another embodiment of the present disclosure.

In some embodiments, the electrostatic shield 300 obtains a ground potential by means of a ground pad to which the ground potential is applied. The grounding pad may be formed by disposing a metal structure on the substrate 100, for example, depositing a metal structure layer with the same material as the electrostatic protection layer on the substrate 100. It is understood that the ground pad 400 may also be a high conductive metal material, such as a low resistance material, e.g., copper, which is additionally formed on the substrate 100 and is prepared by deposition, etching, and the like. As an embodiment, as shown in fig. 2 and 3, the non-touch area 120 further includes a bonding area 123 independent from the routing area 121 and the bonding area 122, a first ground pad 401 is disposed on the bonding area 123, and the electrostatic shield 300 is bonded to the first ground pad 401 to apply a ground potential. Generally, the larger the metal area, the lower the resistance, and therefore, in order to obtain better electrostatic protection effect, the overlapping area a between the electrostatic protection layer 300 and the first ground pad 401 is at least 1 square millimeter. In another embodiment, as shown in fig. 4, the touch module includes a second ground pad 402 disposed in the bonding region 122, and the electrostatic protection layer 300 is overlapped with the second ground pad 402 to be applied with a ground potential. Accordingly, in order to obtain better esd protection, the overlapping area a between the esd protection layer 300 and the second ground pad 402 is at least 1 mm.

Fig. 5 is a schematic side view illustrating a touch module according to another embodiment of the present disclosure.

In other embodiments, as shown in fig. 5, the touch module further includes a frame 500, the frame 500 is configured to have fixing positions for clamping and fixing opposite ends of the substrate 100, a grounding conductive layer 600 is disposed on an inner wall of the fixing positions, the grounding conductive layer 600 is in contact with the electrostatic protection layer 300, and the electrostatic protection layer 300 obtains a ground potential by means of the grounding conductive layer 600 to which a ground potential is applied. Accordingly, in order to obtain a better electrostatic protection effect, the overlapping area a between the electrostatic protection layer 300 and the grounding conductive layer 600 is at least 1 square millimeter. Generally, a gasket is disposed between the bezel 500 and the substrate 100 to protect an edge region of the substrate, and in order to dissipate accumulated static electricity, a material of the gasket may include a conductive polymer, a conductive silicone, or other similar materials, and the gasket may be grounded to improve effectiveness for static electricity dissipation. In this embodiment, the grounding conductive layer 600 contacts the inner wall of the fixing portion to protect the edge of the substrate 100, and since the grounding conductive layer 600 is grounded, the accumulated static electricity can be dissipated, the effectiveness of the static electricity dissipation is improved, and the function of a gasket can be realized and the grounding potential can be applied to the static electricity protection layer 300. In some embodiments, grounded conductive layer 600 may overlie or otherwise contact at least one inner wall surface in a fixed position, and the shape of grounded conductive layer 600 may be adapted to the shape of the perimeter covering the inner wall, and thus may have any regular or irregular shape and/or may include one or more curvilinear edges. Alternatively, in other embodiments, the grounding conductive layer 600 may be in contact with other layers (e.g., the insulating layer 200, etc.) in the touch module without limitation. In some embodiments, bezel 500 can be a conductive material (e.g., metal) further improving effectiveness for static dissipation.

The grounding conductive layer 600 may be obtained by disposing a metal structure on the substrate 100, for example, depositing a metal structure layer with the same material as the electrostatic protection layer on the substrate 100. It is understood that the ground conductive layer 600 may also be a high conductive metal material, such as a low resistance material, e.g., copper, which is additionally formed on the substrate 100 and is prepared by deposition, etching, and the like. As an embodiment, as shown in fig. 5, an orthographic projection of the grounding conductive layer 600 on the first surface falls within a range of an orthographic projection of the insulating layer 200 on the first surface, for example, an area of the orthographic projection of the grounding conductive layer 600 on the first surface may be smaller than, equal to, or larger than an area of the orthographic projection of the electrostatic protection layer 300 on the first surface.

It should be noted that, in the concept of the present invention, by designing the overlapping area and disposing the portion having the grounding conductive function in the overlapping area, a better electrostatic protection effect is obtained, the overlapping area may be formed by extending the original binding area 122, the overlapping area 123 may be disposed outside the binding area 122, the grounding conductive layer 600 on the frame 500 may be used as the overlapping area, the overlapping area may be manufactured by different manufacturing methods, the size and the position of the overlapping area may be set according to actual requirements, the three overlapping forms listed above are only used as examples for convenience of description, and this is not specifically limited in the embodiment of the present application.

Based on the same inventive concept, an embodiment of the present application further provides a touch display device, which includes the touch module and the display module in the above embodiments, wherein the touch module is coupled to one side of the display module.

It should be understood that the touch display device provided by the above embodiment can be applied to the fields of mobile phone terminals, bionic electronics, electronic skins, wearable devices, vehicle-mounted devices, internet of things devices, artificial intelligence devices, and the like. For example, the touch display device may be a mobile phone terminal, a tablet, a palmtop, an ipod, a smart watch, a laptop computer, a television, a monitor, or the like.

The applications are only a few exemplified applications of the present embodiment, and it should be understood that the applications of the touch display device are not limited to the fields exemplified above.

To sum up, the embodiment of the present application provides a touch module and a touch display device, an insulating layer may be disposed on the driving (Tx) side 101, or the insulating layer 200 may be disposed on the driving (Tx) side 101 and the sensing (Rx) side 102, respectively, and the electrostatic protection layer 300 is disposed on the insulating layer 200, so that the area of the electrostatic protection layer 300 is increased, and the electrostatic protection layer 300 reaches a smaller resistance value, which can replace the peripheral ground line 20 in the original circuit area to release static electricity, and can also reduce the area required by the peripheral ground line 20 in the original circuit area, thereby obtaining a touch module with a reduced frame. That is, in the embodiment of the present application, the electrostatic protection pattern is designed on the same side of the touch module, which is not only suitable for the electrostatic protection during the single-sided wiring but also suitable for the electrostatic protection during the double-sided wiring.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A touch module, comprising:

2. The touch module of claim 1, wherein the non-touch area further comprises a bonding area independent of the routing area and the bonding area;

3. The touch module of claim 2, wherein a contact area between the electrostatic protection layer and the first ground pad is at least 1 mm.

4. The touch module of claim 1, wherein the touch module comprises a second ground pad disposed in the bonding area;

5. The touch module of claim 4, wherein a contact area between the electrostatic protection layer and the second ground pad is at least 1 mm.

6. The touch module of claim 1, further comprising a frame configured to have fixing positions for clamping and fixing two opposite ends of the substrate;

the grounding conductive layer is in contact with the static protection layer.

7. The touch module of claim 6, wherein an orthogonal projection of the ground conductive layer on the first surface falls within an orthogonal projection range of the insulating layer on the first surface.

8. The touch module of claim 6, wherein the ground conductive layer is a metal layer.

9. The touch module of any one of claims 1-8, wherein the insulating layer is a silicon dioxide layer.

10. The touch module of any one of claims 1-8, wherein the electrostatic protection layer is a silver paste conductive layer.

11. A touch display device, comprising:

the touch module according to any one of claims 1-10; and

the touch control module is coupled to one side of the display module.