CN111158534A

CN111158534A - Routing method of narrow-frame touch screen

Info

Publication number: CN111158534A
Application number: CN201911242477.XA
Authority: CN
Inventors: 孟祥浩; 李奇琳; 甘堃; 陈超云
Original assignee: Shenzhen Sunroll Technology Co ltd
Current assignee: Shenzhen Sunroll Technology Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-05-15

Abstract

The invention provides a wiring method of a narrow-frame touch screen, which comprises the following steps: providing a glass substrate and a substrate layer, the substrate layer at least comprising: a transparent conductive film defined as RX1, a first transparent conductive film defined as RX1, a second transparent conductive film defined as TX1, and a first wiring substrate layer defined as TX 2; printing silver paste on one surface of each substrate layer to form a surface silver layer, defining an in-plane pattern of the surface silver layer of the transparent conductive film, and defining trace wiring patterns on the surface silver layers of all the substrate layers; and adopting OCA optical cement to sequentially laminate and combine the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer, and enabling the trace wiring patterns in the first transparent conductive film, the second transparent conductive film and the first lead substrate layer to be arranged towards the surface of the glass substrate.

Description

Routing method of narrow-frame touch screen

Technical Field

The invention belongs to the technical field of display, and particularly relates to a wiring method of a narrow-frame touch screen.

Background

With the development of smart phones, the popularity of capacitive touch is higher and higher, and the touch technology is more and more mature. Meanwhile, with the development of conductive film technology, large-size capacitive touch solutions are becoming mature. In order to match with the conventional large-size display design, the touch screen puts higher requirements on the frame, and the narrow frame has become a trend of future development.

The width of the capacitive touch frame is mainly determined by the number of channel routing lines and the line width and line distance. Because the large-size capacitive touch is generally used for preparing the trace pattern by laser etching, in the etching process, the etching width of a single channel can be increased along with the increase of the size of a laser etching machine, and if the etching width is kept or reduced, the equipment cost can be exponentially increased, and meanwhile, the efficiency is reduced; and when the single channel etching width is reduced, the risk of wire breakage and short circuit of the lead wire is greatly increased, so that the function yield is reduced. At present, for large-size capacitive touch control, the width of a capacitive touch control frame is reduced through line width and line distance design, which is already in a bottleneck state, and further reduction of the line width and line distance is difficult. Meanwhile, the channel wiring quantity of the large-size capacitive touch control is very large, and the wiring arrangement with large quantity undoubtedly increases the design difficulty of the frame.

Disclosure of Invention

The invention aims to provide a routing method of a narrow-frame touch screen, and aims to solve the problems that the existing large-size capacitive touch screen is large in channel routing quantity and difficult to realize narrow-frame design.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a wiring method of a narrow-frame touch screen, which comprises the following steps:

providing a glass substrate and a substrate layer, the substrate layer at least comprising: a first transparent conductive film defined as RX1, a second transparent conductive film defined as TX1, and a first wiring substrate layer defined as TX 2;

printing silver paste on one surface of each substrate layer to form a surface silver layer, defining an in-plane pattern of the surface silver layer of the transparent conductive film, and defining trace wiring patterns on the surface silver layers of all the substrate layers;

adopting OCA optical cement to laminate and combine the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead base material layer in sequence to form a laminated structure of the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead base material layer, and enabling: the trace wiring patterns in the first transparent conductive film, the second transparent conductive film and the first lead base material layer are all arranged facing the surface of the glass substrate, wherein the wiring ends of the touch screen at least comprise an RX1 wiring end, a TX1 wiring end and a TX2 wiring end; the wire outlet terminals of the touch screen at least comprise an RX1 wire outlet terminal and a TX1 wire outlet terminal.

Preferably, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer are all transparent conductive films, and in the step of defining the in-plane pattern on the surface of the silver paste of the transparent conductive film layer, the in-plane pattern of the surface silver layer of the three transparent conductive films is defined; the outlet terminals comprise an RX1 outlet terminal, a TX1 outlet terminal and a TX2 outlet terminal.

Preferably, the first lead base material layer is a transparent organic polymer layer;

the in-plane pattern of TX1 contains all TX channels;

the projection areas of the TX1 wiring end and the TX2 wiring end are partially or completely overlapped, and the TX1 wiring end is electrically connected with the TX2 wiring end;

the outlet terminals are an RX1 outlet terminal and a TX1 outlet terminal, and the TX1 outlet terminal carries all TX outlet wires.

Preferably, the transparent organic polymer in the transparent organic polymer layer is selected from at least one of PEN, COP, COC, PI, and PMM.

Preferably, all the three substrate layers are transparent conductive films, and the transparent conductive film for defining TX2 is a shielding film;

in the step of defining trace patterns on the surfaces of the silver pastes, defining in-plane patterns on the surfaces of the silver pastes of the first transparent conductive film and the second transparent conductive film, wherein the shielding films do not define in-plane patterns, and the in-plane patterns of TX1 contain all TX channels;

Preferably, the step of sequentially laminating and bonding the glass substrate, the first transparent conductive film, the second transparent conductive film, and the first lead base material layer by using an OCA optical paste to form a glass substrate, the first transparent conductive film, the second transparent conductive film, and the first lead base material layer includes:

form glass substrate in proper order, first transparent conductive film the stromatolite of second transparent conductive film, will behind the second transparent conductive film opening second transparent conductive film deviates from the surface of first lead substrate layer combines first lead substrate layer to deposit silver thick liquid at the opening part, realize the electric connection of TX1 wiring and TX2 wiring.

Preferably, the method for depositing silver paste at the opening comprises the following steps: silver paste is dispensed on the opening by a dispenser; or

The method for depositing the silver paste at the opening comprises the following steps: and printing silver paste at the opening position.

Preferably, the routing of TX is shared equally by TX1 and TX 2.

Preferably, the vertical distance between the TX1 wiring end and the RX1 wiring end is 30-100um, and the vertical distance between the TX1 wiring end and the TX2 wiring end is 30-100 um.

Preferably, the substrate layer further comprises 1 to 3 lead substrate layers, the 1 to 3 lead substrate layers are used for defining TX and/or RX, and all the substrate layers used for defining RX are respectively adjacently arranged to form an RX lamination; all substrate layers used for defining TX are respectively adjacently arranged to form a TX laminated layer;

when the lead substrate layer for defining TX and/or RX is a transparent conductive film, the corresponding film layer is provided with a wire outlet end; when the lead substrate layer for defining TX and/or RX is an organic polymer layer, no outlet end is arranged on the corresponding film layer.

According to the wiring method of the narrow-frame touch screen, at least three substrate layers are arranged, trace wiring patterns are defined on surface silver paste of the three substrate layers, and in a laminated structure formed after lamination, TX wiring is respectively defined by at least two adjacent substrate layers, so that TX outgoing lines are shared by a TX1 layer and a TX2 layer, the number of single-layer wiring is reduced, and the width of a frame is narrowed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a narrow-bezel touch screen according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another narrow-bezel touch screen according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another narrow-bezel touch screen according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The weight of the related components mentioned in the description of the embodiments of the present invention may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present invention as long as it is in accordance with the description of the embodiments of the present invention. Specifically, the weight described in the description of the embodiment of the present invention may be a unit of mass known in the chemical industry field, such as μ g, mg, g, and kg.

With reference to fig. 1-3, an embodiment of the present invention provides a routing method for a narrow-bezel touch screen, including the following steps:

s01, a glass substrate and a base material layer are provided, wherein the base material layer at least comprises: a first transparent conductive film defined as RX1, a second transparent conductive film defined as TX1, and a first wiring substrate layer defined as TX 2;

s02, silver paste is printed on one surface of each substrate layer to form a surface silver layer, an in-plane pattern of the surface silver layer of the transparent conductive film is defined, and trace wiring patterns are defined on the surface silver layers of all the substrate layers;

s03, adopting OCA optical cement to sequentially laminate and combine the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer to form a laminated structure of the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer, and enabling: the trace wiring patterns in the first transparent conductive film, the second transparent conductive film and the first lead base material layer are all arranged facing the surface of the glass substrate, wherein the wiring ends of the touch screen at least comprise an RX1 wiring end, a TX1 wiring end and a TX2 wiring end; the wire outlet terminals of the touch screen at least comprise an RX1 wire outlet terminal and a TX1 wire outlet terminal.

According to the routing method of the narrow-frame touch screen, at least three substrate layers are arranged, trace routing patterns are defined on surface silver paste of the three substrate layers, and in a laminated structure formed after lamination, TX routing is respectively defined by at least two adjacent substrate layers, so that TX outgoing lines are shared by a TX1 layer and a TX2 layer, the number of single-layer routing is reduced, and the width of a frame is narrowed.

Specifically, in the step S01, a glass substrate is provided, and the glass substrate is used as a deposition base of the substrate layer in the process of preparing the narrow-frame touch screen; meanwhile, the protective layer is also used as a protective layer of the narrow-frame touch screen. In some embodiments, the glass substrate is selected from strengthened glass.

Providing a substrate layer, the substrate layer comprising at least: one transparent conductive film (first transparent conductive film) defined as RX1, one transparent conductive film (second transparent conductive film) defined as TX1, and one first wiring substrate layer defined as TX 2. That is, the substrate layer includes at least two transparent conductive films, and the two transparent conductive films are used to define RX and TX (numbers after RX and TX are used only as numbers to distinguish different layers). The transparent conductive film is made of conductive materials, and an in-plane pattern of the metal electrode is formed through composition processing; meanwhile, the area outside the face inner pattern is patterned to define trace patterns for arranging at least part of the traces RX and part of the TX respectively (i.e. the transparent conductive film simultaneously serves as a lead layer).

Besides two layers of transparent conductive films, the substrate layer at least comprises a layer structure which is used for shunting TX routing and is defined as a first lead substrate layer of TX 2. Through increasing first lead wire substrate layer, can shunt the line of walking of TX, reduce the line quantity of the single-deck TX to help reducing capacitive touch screen's frame width, further realize narrow frame design. The first lead base material layer may be a transparent conductive film or a non-transparent conductive film.

In some embodiments, the substrate layer may further include 1 to 3 lead substrate layers in addition to two layers of the transparent conductive film and one layer of the first lead substrate layer, and the lead substrate layers are used for defining TX and/or RX, wherein all the substrate layers for defining RX are respectively adjacently disposed to form an RX laminated structure; all substrate layers for defining TX are respectively adjacently arranged to form a TX laminated structure. Through additionally arranging 1-3 layers of lead substrate layers, the shunt of the TX wiring and the RX wiring in multiple levels can be realized, the wiring quantity of the single-layer TX and/or RX wiring is obviously reduced, the frame width of the capacitive touch screen is obviously reduced, and the narrow frame design is further realized.

It should be noted that if the total number of layers of the substrate layer is too many and exceeds six layers, the optical transmittance of the touch screen is reduced, the haze change is large, the difference of the distance d between the driving layer and the receiving layer is large, and the signal difference is obvious, so that the touch effect and the experience are influenced.

In some embodiments, the 1 to 3 layers of lead base material layers are all used to define TX, and may be sequentially labeled TX3, TX4, TX5, depending on the number of layers of the lead base material layers. At the moment, the TX wiring is divided by three to five lead layers, so that the number of single-layer TX wiring is greatly reduced, and the width of a frame of the capacitive touch screen is remarkably reduced.

In some embodiments, the 1 to 3 lead base material layers are all used to define RX, and may be sequentially labeled RX2, RX3, RX4 according to the number of layers of the lead base material layer. At the moment, the TX wiring is divided by two lead layers, the RX wiring is divided by two to four lead layers, the number of the single-layer RX and TX wirings is greatly reduced, and therefore the frame width of the capacitive touch screen is remarkably reduced.

In some embodiments, the 1 to 3 layers of lead base material layers are used to define TX and RX, which may be labeled RX2, TX3, TX4, or RX2, RX3, TX3, depending on the number of layers of lead base material layers defining TX and RX. At the moment, the TX routing is shunted by at least three lead layers, and the RX routing is shunted by at least two lead layers, so that the number of single-layer RX and TX routing is greatly reduced, and the frame width of the capacitive touch screen is remarkably reduced.

On the basis of the above-described embodiments, when the lead base material layer for defining TX and/or RX is a transparent conductive film, the corresponding transparent conductive film is provided with both wiring and outlet terminals. When the lead substrate layer for defining TX and/or RX is an organic polymer layer, the corresponding organic polymer layer is provided with a wiring, but is not provided with an outlet terminal. The wiring of the organic polymer layer tx (rx) is electrically connected to the wiring of the transparent conductive film tx (rx), and then led out of the transparent conductive film.

In some embodiments, the substrate layer includes only two transparent conductive films, the other layers are all non-conductive material layers, and the two transparent conductive films are used to define RX1 and TX1 (the numbers after RX and TX are used only as numbers to distinguish different layers).

In the embodiment of the present application, when the substrate layer is a non-transparent conductive layer, the material of the substrate layer is selected from transparent polymers, that is, the non-transparent conductive layer is a transparent polymer layer. In some embodiments, the transparent organic polymer in the transparent organic polymer layer is selected from at least one of PEN, COP, COC, PI, PMMA. The materials are all optical base materials with good comprehensive performance, so that different product devices can be selected. Wherein PEN and PET have the closest properties, but differ in modulus and water permeability; COP/COC are two similar materials and have the characteristic of low rainbow texture; PI has the characteristic of high modulus and is the best organic material used in the bending and flexible fields at present; PMMA is a hard organic polymer, can replace glass, and brings good supporting performance.

In the step S02, silver paste is printed on one surface of each of the substrate layers to form a surface silver layer. Further, for a surface silver layer of which the substrate layer is a transparent conductive film, defining an in-plane pattern and a trace wiring pattern of the transparent conductive film; for the surface silver layer of which the substrate layer is a transparent organic polymer layer, an in-plane pattern does not need to be defined, but a trace wiring pattern needs to be defined on the surface silver layer and is used for RX or TX wiring.

In some embodiments, an in-plane pattern of the surface silver layer of the transparent conductive film is defined, trace patterns are defined on the surface silver layers of all the substrate layers, and the trace patterns are realized by adopting a laser process.

In step S03, the glass substrate, the first transparent conductive film, and the second transparent conductive film are sequentially bonded to each other with an OCA optical adhesive to form a laminated structure.

In the embodiment of the application, the OCA optical cement is adopted to sequentially laminate and combine the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer to form a laminated structure of the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer, and the trace wiring patterns are arranged on the surface of the substrate layer facing the glass substrate. The wiring ends at least comprise an RX1 wiring end, a TX1 wiring end and a TX2 wiring end; the outlet terminals at least comprise an RX1 outlet terminal and a TX1 outlet terminal.

In a first embodiment, a narrow bezel touch screen includes three substrate layers: the first transparent conductive film, the second transparent conductive film and the first lead substrate layer, and the three substrate layers are all transparent conductive films, and in the step of defining the in-plane pattern on the surface of the silver paste of the transparent conductive film layer, the in-plane pattern of the surface silver layer of the three transparent conductive films is defined;

adopt OCA optical cement will glass substrate, first transparent conductive film, second transparent conductive film and first lead wire substrate layer combines in proper order, forms glass substrate, first transparent conductive film, second transparent conductive film and the laminated structure of first lead wire substrate layer, and makes: the trace wiring patterns are all arranged on the surface, facing the glass substrate, of the substrate layer. The wiring ends comprise an RX1 wiring end, a TX1 wiring end and a TX2 wiring end; the outlet terminals comprise an RX1 outlet terminal, a TX1 outlet terminal and a TX2 outlet terminal.

In a second embodiment, the narrow-bezel touch screen includes three substrate layers, and the three substrate layers are respectively: a first transparent conductive film defined as RX1, a second transparent conductive film defined as TX1, and a third wiring substrate layer defined as TX2, the first wiring substrate layer being a transparent organic polymer layer. In the step of defining an in-plane pattern on the surface of the silver paste of the transparent conductive film layer, defining the in-plane pattern on the surface silver layers of the two transparent conductive films, defining a trace wiring pattern on the surface silver layers of the three substrate layers, wherein the in-plane pattern of TX1 comprises all TX channels;

adopting OCA optical cement to combine the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer in sequence to form a laminated structure of the glass substrate, the first transparent conductive film, the second transparent conductive film and the first lead substrate layer, wherein trace wiring patterns are arranged on the surface of the substrate layer facing the glass substrate. The projection areas of the TX1 wiring end and the TX2 wiring end are partially or completely overlapped, and the TX1 wiring end is electrically connected with the TX2 wiring end; the outlet terminals only comprise an RX1 outlet terminal and a TX1 outlet terminal, and the TX1 outlet terminal comprises all TX outlet lines.

In a third embodiment, the narrow-bezel touch screen includes three substrate layers, and the three substrate layers are transparent conductive films, which are: a first transparent conductive film defined as RX1, a second transparent conductive film defined as TX1, and a shielding film defined as TX2 (i.e., the transparent conductive film used to define TX2 is the shielding film). At this moment, the shielding layer not only can share partial TX frame wiring, but also can serve as a shielding layer to play a shielding role, and signal interference from components such as an LCD (liquid crystal display) is shielded. In this embodiment, in the step of defining an in-plane pattern on the surface of the silver paste of the transparent conductive film layer, the surface silver layers of the two transparent conductive films, RX1 and TX1, are respectively defined as an in-plane pattern, and the shielding film of TX2 is not defined as an in-plane pattern; defining trace wiring patterns on the surface silver layer of the three-layer substrate layer, wherein the in-plane patterns of TX1 comprise all TX channels;

In some embodiments, the TX1 wire end and TX2 wire end electrical connection may be achieved by: form glass substrate in proper order, first transparent conductive film the stromatolite of second transparent conductive film, will behind the second transparent conductive film opening second transparent conductive film deviates from the surface of first lead substrate layer combines first lead substrate layer to deposit silver thick liquid at the opening part, realize the electric connection of TX1 wiring and TX2 wiring. In some embodiments, the method for depositing the silver paste at the opening comprises: and adopting a dispenser to dispense silver paste on the opening. In some embodiments, the method for depositing the silver paste at the opening comprises: and printing silver paste at the opening position.

In the above three embodiments, preferably, the TX traces are equally split by TX1 and TX2, so that the number of single-layer TX traces is at most half of the total number of TX traces, and therefore, compared with a capacitive touch screen with only one layer of TX traces, the bezel is reduced by half.

In the three embodiments, the vertical distance between the TX1 wiring end and the RX1 wiring end is 30-100um, the vertical distance between the TX1 wiring end and the TX2 wiring end is 30-100um, and the vertical distances between the wiring ends of adjacent layers are equal, so that a stable IC-induced capacitance value can be obtained, and finally, a precise touch experience is obtained. It should be understood that the effect is greater when the capacitive touch screen defines a greater number of layers RX and TX.

In the above embodiments, the substrate layer further includes 1 to 3 lead substrate layers, and the lead substrate layer is used to define TX and/or RX and to increase shunting of TX and/or RX traces. When the lead substrate layer for defining TX and/or RX is a transparent conductive film, the corresponding film layer is provided with a wire outlet end, and each transparent conductive film; when the lead substrate layer for defining TX and/or RX is an organic polymer layer, the corresponding film layer is not provided with a wire outlet end, and wires of the organic polymer layer are electrically connected with wires of the transparent conductive film and then are led out together through the transparent conductive film. The electrical connection method is described above, and is not repeated here.

In some embodiments, the substrate layer further comprises 1-3 lead substrate layers, and the vertical distances between the adjacent wiring ends are equal and are 30-100 μm. Since the size of the light spot is about 30um, the vertical distance between the adjacent wire ends is not more than 100um to meet the supporting performance; and when the vertical distances between the adjacent wiring ends are equal, the IC signal characteristics are better)

In some embodiments, the capacitive touch screen comprises a plurality of substrate layers defining RX, in this case, all the substrate layers defining RX are respectively adjacently arranged (sequentially laminated and combined by using OCA optical cement) to form an RX laminated structure, and then the substrate layers defining TX are combined on the surface of the RX laminated structure far away from the glass substrate to construct the RX and TX laminated structure.

In some embodiments, the plurality of substrate layers defining the RX only include one transparent inorganic polymer layer, so that the RX wiring of the transparent inorganic polymer layer is electrically connected with the RX wiring between the adjacent transparent conductive layers, and the process difficulty is reduced.

In some embodiments, the RX-defining substrate layers include two transparent inorganic polymer layers, and in this case, the two transparent inorganic polymer layers are respectively bonded to both surfaces of the RX-defining transparent conductive layer by OCA optical cement. The RX wiring of the two transparent inorganic polymer layers is respectively and electrically connected with the RX wiring between the adjacent transparent conductive layers.

In some embodiments, when the capacitive touch screen includes a plurality of substrate layers defining TX, all the substrate layers defining TX are respectively disposed adjacently (sequentially laminated and combined by using OCA optical cement) to form a TX laminated structure, and then the substrate layers defining RX are combined on the surface of the TX laminated structure away from the glass substrate to construct a laminated structure of RX and TX.

In some embodiments, the substrate layers defining the TX only include one transparent inorganic polymer layer, so that the TX wiring of the transparent inorganic polymer layer is electrically connected with the TX wiring between the adjacent transparent conductive layers, and the process difficulty is reduced.

In some embodiments, the substrate layers defining the TX include two transparent inorganic polymer layers, and at this time, the two transparent inorganic polymer layers are respectively bonded to both surfaces of the transparent conductive layer defining the TX by OCA optical cement. TX wirings of the two transparent inorganic polymer layers are respectively electrically connected with RX wirings between the adjacent transparent conductive layers.

In some embodiments, the plurality of TX-defining substrate layers comprises three transparent inorganic polymer layers, and any two transparent inorganic polymers are not overlappingly bonded.

In some embodiments, the capacitive touch screen comprises a plurality of substrate layers defining RX and a plurality of substrate layers defining TX, in which all the substrate layers defining RX are respectively adjacently disposed (sequentially stacked and combined by using OCA optical cement) to form an RX stacked structure, all the substrate layers defining TX are respectively adjacently disposed (sequentially stacked and combined by using OCA optical cement) to form a TX stacked structure, and then the TX stacked structure is combined on the surface of the RX stacked structure away from the glass substrate to construct the RX and TX stacked structure.

The following description will be given with reference to specific examples.

Example 1

A routing method of a narrow-frame touch screen comprises the following steps:

providing a tempered glass substrate (CG) and three transparent conductive films: one layer is defined as RX, one layer is defined as TX1 and one layer is defined as TX 2;

respectively printing silver paste on one surface of the three transparent conductive films to form a surface silver layer, and defining an in-plane pattern and a trace wiring pattern of the surface silver layer of the transparent conductive film by using a laser process; the TX1 and the TX2 equally divide the number of TX traces (the total number of TX traces is TX1 trace number + TX2 trace number);

adopting OCA optical cement to sequentially combine the tempered glass, RX, TX1 and TX2 to form a laminated structure of the tempered glass, RX, TX1 and TX2, wherein trace wiring patterns are all arranged on the surface, facing the glass substrate, of the substrate layer, wiring ends comprise an RX wiring end, a TX1 wiring end and a TX2 wiring end, and wire outlet ends comprise an RX wire outlet end, a TX1 wire outlet end and a TX2 wire outlet end.

The schematic structural diagram of the narrow-frame touch screen prepared by the method is shown in fig. 1.

Example 2

A routing method of a narrow-frame touch screen comprises the following steps:

providing a strengthened glass substrate, two transparent conductive films and a PET substrate, wherein one transparent conductive film is defined as RX, one transparent conductive film is defined as TX1, and the PET substrate is defined as TX 2;

silver paste is respectively printed on one surface of each of the three substrate layers to form a surface silver layer, an in-plane pattern of the surface silver layer of the transparent conductive film is defined by a laser process, and trace wiring patterns are defined on the surface silver layers of all the substrate layers; the in-plane graph of TX1 includes all TX channels, and TX1 and TX2 equally divide the number of TX traces (the total number of TX traces is TX1 trace number + TX2 trace number);

adopting OCA optical cement to sequentially combine the tempered glass, RX and TX1 to form a laminated structure of the tempered glass, RX and TX1, after the TX1 is subjected to laser opening, combining TX2 on the surface of the TX1, which is far away from the RX layer, and arranging trace wiring patterns on the surface of the substrate layer, which faces the glass substrate. Printing silver paste at the opening, realizing the electrical connection of TX1 wiring and TX2 wiring through the silver paste, and finally leading out wires from TX1, wherein the wiring end comprises an RX wiring end, a TX1 wiring end and a TX2 wiring end, and the leading-out end comprises an RX leading-out end and a TX1 leading-out end.

Example 3

A routing method of a narrow-frame touch screen comprises the following steps:

adopting OCA optical cement to sequentially combine the tempered glass, RX and TX1 to form a laminated structure of the tempered glass, RX and TX1, after the TX1 is subjected to laser opening, combining TX2 on the surface of the TX1, which is far away from the RX layer, and arranging trace wiring patterns on the surface of the substrate layer, which faces the glass substrate. The method comprises the steps that a point gluing machine is adopted to conduct point gluing on a silver paste at an opening, electrical connection of TX1 wiring and TX2 wiring is achieved through the silver paste, and finally all wires are led out from TX1, wherein each wiring end comprises an RX wiring end, a TX1 wiring end and a TX2 wiring end, and each wire outlet end comprises an RX wire outlet end and a TX1 wire outlet end.

Fig. 2 shows schematic structural diagrams of the narrow-frame touch panels prepared in embodiments 2 and 3.

Example 4

A routing method of a narrow-frame touch screen comprises the following steps:

providing a tempered glass substrate and three transparent conductive films: one layer defined as RX, one layer defined as TX1 and one layer defined as TX2, and the transparent conductive layer defining TX2 is a shielding layer;

silver paste is respectively printed on one surface of the three layers of substrate films to form surface silver layers, in-plane patterns of the surface silver layers of RX and TX1 are defined by a laser process, and trace wiring patterns are defined on the surface silver layers of all the substrate layers; the in-plane graph of TX1 includes all TX channels, and TX1 and TX2 equally divide the number of TX traces (the total number of TX traces is TX1 trace number + TX2 trace number);

Example 5

A routing method of a narrow-frame touch screen comprises the following steps:

Fig. 3 shows schematic structural diagrams of the narrow-frame touch panels prepared in embodiments 4 and 5.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A wiring method of a narrow-frame touch screen is characterized by comprising the following steps:

2. The method for routing a narrow-bezel touch screen according to claim 1, wherein the first transparent conductive film, the second transparent conductive film and the first lead substrate layer are all transparent conductive films, and in the step of defining an in-plane pattern on the surface of the silver paste of the transparent conductive film layer, an in-plane pattern of a surface silver layer of three transparent conductive films is defined; the outlet terminals comprise an RX1 outlet terminal, a TX1 outlet terminal and a TX2 outlet terminal.

3. The method for routing a narrow-bezel touch screen according to claim 1, wherein the first lead substrate layer is a transparent organic polymer layer;

the in-plane pattern of TX1 contains all TX channels;

4. The method for routing a narrow-bezel touch screen according to claim 3, wherein the transparent organic polymer in the transparent organic polymer layer is at least one selected from PEN, COP, COC, PI, and PMM.

5. The method for routing a narrow-bezel touch screen according to claim 1, wherein the three substrate layers are all transparent conductive films, and the transparent conductive film for defining TX2 is a shielding film;

6. The method for routing a narrow-bezel touch screen according to any one of claims 3 to 5, wherein in the step of sequentially laminating and bonding the glass substrate, the first transparent conductive film, the second transparent conductive film, and the first lead substrate layer by using an OCA optical adhesive to form a laminated structure in which the glass substrate, the first transparent conductive film, the second transparent conductive film, and the first lead substrate layer are sequentially laminated and bonded, the method comprises:

7. The method for routing a narrow-bezel touch screen according to claim 6, wherein the method for depositing silver paste at the opening comprises: silver paste is dispensed on the opening by a dispenser; or

8. The method for routing a narrow-bezel touch screen according to any one of claims 2 to 5 and 7, wherein the routing of TX is equally shared by TX1 and TX 2.

9. The method for routing a narrow-bezel touch screen according to any one of claims 2 to 5 and 7, wherein a vertical distance between the TX1 wiring end and the RX1 wiring end is 30-100um, and a vertical distance between the TX1 wiring end and the TX2 wiring end is 30-100 um.

10. The routing method for the narrow-bezel touch screen according to claim 1, wherein the substrate layer further includes 1 to 3 lead substrate layers, the 1 to 3 lead substrate layers are used for defining TX and/or RX, and all the substrate layers used for defining RX are respectively adjacently disposed to form an RX stack; all substrate layers used for defining TX are respectively adjacently arranged to form a TX laminated layer;