WO2021027534A1

WO2021027534A1 - Touch screen and electronic device

Info

Publication number: WO2021027534A1
Application number: PCT/CN2020/104702
Authority: WO
Inventors: 杨育展; 李建铭; 贾卫波; 刘兵; 李林盛; 张君勇; 李亚鹏
Original assignee: 华为技术有限公司
Priority date: 2019-08-13
Filing date: 2020-07-25
Publication date: 2021-02-18
Also published as: CN112394824A; CN112394824B

Abstract

The present application provides a touch screen and an electronic device. The touch screen comprises an exterior structure layer, an antenna layer, a touch layer, and a display screen stacked in sequence. The touch layer is provided with a plurality of touch wires. The plurality of touch wires intersect each other, and form a plurality of touch sensing points in a touch region of the touch layer. The antenna layer is provided with an antenna, and the projection of the antenna on the touch layer intersects the plurality of touch sensing points so as to expose the touch sensing points. By providing the antenna and the touch wires on different layer structures respectively, the antenna and the touch wires can work independently during signal transmission without affecting each other, so as to achieve a better signal transmission effect. In addition, the position of the antenna on the antenna layer can also be adjusted so that the antenna does not occupy the space of a bezel of the electronic device, thereby facilitating the achievement of narrow bezel design of the electronic device.

Description

Touch screen and electronic equipment

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910746270.X, and the application name is "a touch screen and electronic device" on August 13, 2019, the entire content of which is incorporated into this application by reference in.

Technical field

This application relates to the field of antenna technology, and in particular to a touch screen and electronic equipment.

Background technique

At present, electronic devices (such as mobile phones, smart watches, etc.) are changing with each passing day. Taking a mobile phone as an example, the requirements for the appearance and wireless performance of the mobile phone are constantly improving. In the trend of large-screen mobile phones that emphasize high-screen-to-body ratio, it is necessary to place more antennas in a smaller space to meet the frequency band requirements.

In the prior art, the antenna is usually made of flexible printed circuit (FPC), laser direct structuring (LDS), or formed on the frame of a mobile phone to radiate signals. Among them, When the antenna is arranged on the frame of the mobile phone, the type of the antenna can be an inverted-F antenna (IFA), a monopole antenna (monopole) or a loop antenna (loop antenna). However, as the requirements for various devices and functions of the mobile phone terminal continue to increase, the above-mentioned antenna setting method can no longer meet the needs of future mobile phone design.

Therefore, how to combine the trend of mobile phones with high screen-to-body ratio to enhance the freedom of antenna design so that it is not limited to the dilemma of the current antenna headroom area becoming smaller and smaller has become an urgent technical problem in the mobile phone field in the future.

Summary of the invention

In the first aspect, the present application provides a touch screen, which mainly includes an appearance structure layer, an antenna layer, a touch layer, and a display screen that are stacked in sequence. Among them, the appearance structure layer can be used as an appearance surface or as a protective layer. The touch layer has a touch area that can realize the touch function. The other areas except the touch area are non-touch areas of the touch layer. In addition, the touch layer is provided with multiple touch traces. The touch traces are arranged to cross each other, and their crossing points are formed in the touch area of the touch layer and can be used as touch sensing points of the touch traces. An antenna is arranged on the antenna layer. In order to enable the touch screen of the present application to achieve a touch sensing effect when in use, the projection of the antenna on the touch layer and the touch points can be interlaced, so that the touch sensing points are exposed. Using the technical solution of the present application, by arranging the antenna and the touch trace on different layer structures, the antenna and the touch trace can work independently during the signal transmission process without affecting each other to achieve better The effect of signal transmission. In addition, the position of the antenna on the antenna layer can be adjusted so that the antenna does not occupy the space of the frame of the electronic device, thereby facilitating the realization of the design of the narrow frame of the electronic device.

In a possible implementation of this application, when the antenna is specifically set up, the projection of the antenna on the touch layer can be made to fall on the boundary of the touch area of the touch layer, or it can be made to fall on the touch area and non-touch area. At the junction of the touch area, this can effectively reduce the influence of the antenna on the signal transmission of the touch trace on the touch layer during signal transmission.

When the antenna is specifically formed, the antenna can be arranged as a plurality of interlaced metal grid lines, and the material of the metal grid lines can be silver or copper. In addition, in order to make the antenna have better signal transmission performance, the line width and line distance of the antenna can also be adjusted. For example, the line width of the antenna is 1-10 μm, and the line distance between two adjacent antennas is 1 ~300μm, to control the square resistance of the antenna below 5 ohms/□, so that the radiation efficiency of the antenna is greatly improved, which is beneficial to improve the signal transmission performance of the antenna.

Similarly, the touch trace can also be set as a plurality of interlaced metal grid lines, and the material of the metal grid lines can also be silver or copper. In addition, the line width of the touch trace can be set to 1-10μm, and the line distance between two adjacent touch traces can be set to 1-300μm to control the square resistance of the touch trace at 1005 Below ohm/□. Since touch traces do not have very high requirements on square resistance during signal transmission, in this technical solution, controlling the square resistance of touch traces within the above range can make it have a better signal. Transmission performance, on the other hand, can make the touch control wiring easy to process, and the processing technology is easy to control.

In addition, the touch trace can also be set as a plurality of interlaced indium tin oxide electrode layer lines.

In a possible implementation of the present application, the antenna layer may also be divided into areas, for example, the antenna layer is divided into an antenna area and a non-antenna area, so that the antenna is arranged in the antenna area. In addition, a virtual antenna that is not capable of signal transmission can be set in the non-antenna area, and the virtual antenna can be a metal grid line that is intermittently set. By setting the virtual antenna in the non-antenna area, the brightness of each part of the touch screen can be made uniform, and the display uniformity of each part of the touch screen can be realized to achieve a better visual effect, which is beneficial to improve the user experience.

In a second aspect, the present application provides a wearable device including a printed circuit board and the touch screen of the first aspect, wherein the printed circuit board is arranged on one side of the display screen of the touch screen. In addition, the printed circuit board is provided with a signal line, and the signal line is connected to the antenna signal of the antenna layer.

In a possible implementation manner, a structural support can be arranged on the printed circuit board, and then the signal line can be arranged on the structural support, or the signal line can also be arranged in the form of a metal shrapnel, where the number of signal lines can be Set according to requirements, for example, one or more. In addition, in this embodiment, no matter what form the signal line is set to, the shortest distance between the signal line and the antenna on the antenna layer can be set within the range of 0.1mm to 5mm, so that the signal line can pass The way of capacitive coupling feeding realizes the effective transmission of signals with the antenna. In this way, the direct connection between the signal line and the antenna layer can be avoided, and the problem of unstable impedance of the contact points directly contacting the electrical connection due to factors such as oxidation can be avoided.

In the third aspect, the present application also provides a wearable device, which includes a printed circuit board, the touch screen of the first aspect, and a housing. The housing can be, but is not limited to, a metal housing, as long as signal transmission can be achieved OK. Wherein, the printed circuit board is arranged on one side of the display screen of the touch screen, and the housing is arranged on the peripheral side of the touch screen, and can be but not limited to be fixed to the printed circuit board by fasteners such as screws.

In addition, the printed circuit board is provided with a signal line, which is connected with fasteners such as screws, so that the signal line can realize signal interaction with the antenna on the antenna layer through the screw and the shell. Wherein, the shortest distance between the housing and the antenna on the antenna layer can be set to 0.1 mm to 5 mm, so that the housing and the antenna on the antenna layer can transmit signals through capacitive coupling and feeding. In this way, the direct connection between the signal line and the antenna layer can be avoided, and the problem of unstable impedance of the contact points directly contacting the electrical connection due to factors such as oxidation can be avoided.

In a fourth aspect, this application also provides a wearable device, which includes a printed circuit board, and the touch screen of the first aspect, wherein the printed circuit board is arranged on one side of the display screen of the touch screen. In addition, the printed circuit board is provided with a signal line, and the signal line is connected to the antenna signal of the antenna layer.

In addition, the signal line is connected to the antenna through one signal flat line, and the signal line is connected to the touch line through another signal flat line; or, the signal line is connected to the antenna and the touch line at the same time through one signal flat line. In this embodiment, when the signal circuit is specifically arranged, the signal circuit can be arranged as a metal elastic sheet fixed on the printed circuit board, or arranged on the structural support of the printed circuit board.

Description of the drawings

FIG. 1 is a schematic structural diagram of an electronic device according to an embodiment of the application;

FIG. 2 is a schematic structural diagram of an electronic device according to another embodiment of the application;

3 is a schematic diagram of the layer structure of a touch screen according to an embodiment of the application;

4 is a schematic diagram of the structure of a touch layer according to an embodiment of the application;

FIG. 5 is a schematic structural diagram of an electronic device according to another embodiment of the application;

6 is a cross-sectional view of an electronic device according to another embodiment of the application;

FIG. 7 is a schematic diagram of a three-dimensional structure of an electronic device according to another embodiment of the application;

8 is a cross-sectional view of an electronic device according to another embodiment of the application;

9 is a cross-sectional view of an electronic device according to another embodiment of the application;

10 is a cross-sectional view of an electronic device according to another embodiment of the application;

11 is a schematic diagram of a layer structure of a touch screen according to another embodiment of the application;

FIG. 12 is a schematic structural diagram of an antenna layer according to another embodiment of the application;

FIG. 13 is a schematic diagram of an exploded structure of an assembly of an antenna layer and a touch layer according to another embodiment of the application;

FIG. 14 is a schematic structural diagram of a touch layer according to another embodiment of the application;

15 is a schematic structural diagram of a touch screen according to another embodiment of the application;

Fig. 16 is an enlarged view of the partial structure at A in Fig. 15.

detailed description

In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

The antenna of the traditional electronic device is usually made by etching or FPC, and then the completed antenna is attached to the touch screen. Since the antenna made by the above method is a visual element, it can only be attached to the non-visual area of the touch screen, which will undoubtedly make the frame of the electronic device wider and cannot meet the requirement of high screen-to-body ratio.

In addition, for touch screens, at present, touch traces of touch screens are usually electrode layer lines formed of indium tin oxide (ITO) materials. The ITO electrode layer circuit can be a conductive transparent circuit, and this transparent circuit can be used to sense the touch operation of a finger. However, the square resistance of ITO is generally between 100 and 300 ohms/□. If ITO is used as an antenna, it will be difficult to obtain good antenna performance due to excessive square resistance. Based on this, an embodiment of the present application provides an electronic device, which may be, but is not limited to, an electronic device such as a mobile phone, a tablet computer, a PDA (personal digital assistant, PDA), a notebook computer, or a smart watch. In order to facilitate the understanding of the electronic device provided by the embodiments of the present application, the electronic device of the present application will be described in detail below with reference to the accompanying drawings, taking the electronic device as a wearable device, such as a smart watch, as an example.

1, an electronic device provided by an embodiment of the present application includes a touch screen, the touch screen has an antenna 101 that can realize signal transmission and a touch trace (not shown in FIG. 1), wherein the touch screen includes a touch screen. For the control area 202 and the non-touch area 203, the antenna 101 can be arranged in the non-touch area 203 of the touch screen. It is understandable that the antenna 101 can be set in various forms, which can be set according to the specific requirements of the frequency band of the antenna 101. For example, in FIG. 1, the antenna 101 can be set to circle the non-touch area 203. In addition, the antenna 101 can also be configured as a semicircle around the non-touch area 203 in FIG. 2. Of course, the antenna 101 can also be in other possible forms, which will not be listed here. By arranging the antenna 101 in the non-touch area 203 of the touch screen, it is possible to prevent the antenna 101 from causing interference to the signal transmission of the touch trace during signal transmission.

In the electronic device shown in FIG. 1 or FIG. 2, the exemplary structure of the touch screen can be referred to FIG. 3. The touch screen is mainly composed of a laminated appearance structure layer 3, a touch layer 2 and a display screen 4. The space can be bonded but not limited to optically clear adhesive (OCA).

Wherein, referring to FIG. 4, the touch layer 2 may include a substrate 6, and the touch wires 201 and the antenna 101 are all arranged on the substrate 6. When forming the touch layer 2, refer to the following steps: first, emboss or etch on the substrate 6 of the touch layer 2 to form a plurality of intersecting first grooves 601 and a plurality of intersecting second grooves 601. A trench 602, in which the first trench 601 is formed in the non-touch area of the touch layer 2, and the second trench 602 is formed in the touch area of the touch layer 2; then, each first trench is filled with liquid metal 601 and the second trench 602, where the liquid metal can be silver paste or copper paste; finally, the liquid metal in the first trench 601 is cooled and solidified to form the antenna 101, and the liquid metal in the second trench 602 is formed after cooling and solidification Touch trace 201.

Because the smaller the line width, the greater the square resistance, and the thicker the line (the height of the line in the trench is defined as the thickness of the line), the smaller the square resistance. In this way, the width L1 of the first trench 601 can be adjusted. The height h1 of the antenna 101 formed in a groove 601 is used to control the square resistance of the antenna 101 below 5 ohm/□. In this way, the radiation efficiency of the antenna 101 can be greatly improved, which is beneficial to improving the signal transmission performance of the antenna 101.

In addition, the width L2 of the second trench 602 and the height h2 of the touch trace 201 formed in the second trench 602 can be adjusted to control the square resistance of the touch trace 201 to 1005 ohms/□ the following. Since the touch wiring 201 has a low requirement on the resistance of the other side during signal transmission, in this technical solution, controlling the square resistance of the touch wiring 201 within the above range can make it have better resistance. The signal transmission performance, on the other hand, makes the touch trace 201 easy to process, and the processing technology is easy to control.

5, an electronic device provided by another embodiment of the present application, the electronic device includes a touch screen, the touch screen has an antenna 101 that can realize signal transmission and touch traces, wherein the touch screen includes a touch area 202 and a non-touch area 203. The difference from the foregoing embodiment is that the antenna 101 can be disposed in the touch area 202 of the touch screen. Of course, it can be understood that, in this embodiment, in addition to the form shown in FIG. 5, the specific arrangement of the antenna 101 may also be other possible forms, which will not be listed here.

In order to enable the antenna 101 to be arranged in the touch area 202 of the touch screen, the structure of the touch screen needs to be adjusted. Referring to FIG. 6, FIG. 6 is a schematic structural diagram of the electronic device of this embodiment, wherein the touch screen of the electronic device mainly includes an appearance structure layer 3, an antenna layer 1, a touch control layer 2 and a display screen 4 which are stacked. In this technical solution, by arranging the antenna and the touch trace on different layer structures, the antenna and the touch trace can be effectively separated, so as to prevent the antenna from causing interference to the touch trace during signal transmission. The interference of the signal transmission of the line.

In addition to the aforementioned touch screen, referring to FIG. 6, in this embodiment, the electronic device may also include a printed circuit board (PCB 7), wherein the PCB 7 is disposed on one side of the display screen 4. Since the PCB 7 is provided with multiple metal components, when this embodiment is used, the distance between the antenna layer 1 and the PCB 7 can be made longer, which can effectively increase the clearance area of the antenna layer 1 and reduce the PCB 7 The impact of metal components on the signal transmission performance of the antenna on the antenna layer 1.

In order to realize the signal transmission between the antenna on the antenna layer 1 and the PCB 7, the PCB 7 can also be provided with a structural support 701 on the side facing the display screen 4. The signal line 702 for signal transmission with the antenna layer 1 can be arranged at For the structural support 701, the shortest distance between the signal line 702 and the antenna on the antenna layer 1 is 0.1 mm to 5 mm, so that the signal line 702 and the antenna on the antenna layer 1 can transmit signals through capacitive coupling. Therefore, the direct connection between the signal line 702 and the antenna layer 1 is avoided, so as to avoid the problem of unstable impedance of the contact point contacting the electrical connection due to factors such as oxidation.

In other embodiments, a structural support 701 can be provided at both ends of the PCB 7, and a signal line 702 is respectively provided on each structural support 701. In this way, one of the signal lines 702 can be used to connect to the antenna layer. The antenna on 1 performs signal transmission, so that the other signal line 702 and the touch trace of the touch layer 2 perform signal transmission. Alternatively, the signal lines 702 at both ends are made to interact with the antenna layer 1 for different signals respectively.

When specifically setting the signal line 702 on the structural support 701, referring to FIG. 7, the structural support 701 can be set as a cube structure connected to the PCB 7, and then the signal line 702 is arranged on the surface of the cube structure. Optionally, The signal line 702 is arranged on the surface of the structural support 701 close to the antenna 101 and the surface where the structural support 701 is connected to the PCB 7. In addition, referring to FIG. 6, the cross-sectional shape of the signal line 702 may be L-shaped or U-shaped. It can be understood that the above arrangement of the signal line 702 is only an exemplary description, and no matter which way the signal line 702 is set, the shortest distance between the signal line 702 and the antenna 101 on the antenna layer 1 can be set as Within the range of 0.1mm to 5mm, the signal line 702 and the antenna 101 can be fed through capacitive coupling to achieve effective signal transmission.

Referring to FIG. 8, in a possible implementation of the present application, the electronic device may include an appearance structure layer 3, an antenna layer 1, a touch layer 2, a display screen 4, and a printed circuit board (PCB 7), where , The appearance structure layer 3, the antenna layer 1, the touch layer 2 and the display screen 4 can be bonded in sequence, and the PCB 7 is arranged on one side of the display screen 4. Since there are multiple metal components on the PCB7, when this embodiment is used, the distance between the antenna layer 1 and the PCB 7 can be made longer, which can effectively increase the clearance area of the antenna layer 1 and reduce the The influence of metal components on the signal transmission performance of the antenna layer 1.

In order to realize the signal transmission between the antenna layer 1 and the PCB 7, in this implementation, a signal line 702 is provided on the side of the PCB 7 facing the display screen 4. The signal line 702 is set as a metal shrapnel fixed on the PCB 7. The shortest distance between the metal shrapnel and the antenna on the antenna layer 1 is set to be 0.1 mm to 5 mm, so that the metal shrapnel can transmit signals with the antenna on the antenna layer 1 through capacitive coupling and feeding. In this way, the direct connection between the signal line 702 and the antenna layer 1 can be avoided, so as to avoid the problem of unstable impedance of the contact points directly contacting the electrical connection due to factors such as oxidation.

In addition, a metal shrapnel can be provided at both ends of the PCB 7, so that one of the signal lines 702 can be used for signal transmission with the antenna on the antenna layer 1, and the other signal line 702 can be connected to the touch layer. 2 touch wires for signal transmission. Alternatively, the signal lines 702 at both ends are made to interact with the antenna layer 1 for different signals respectively.

Similar to the foregoing embodiment, when the signal line 702 is specifically configured as a metal shrapnel, referring to FIG. 8, the bent cross-sectional shape of the signal line 702 made of metal shrapnel can be set to an L shape or a U shape. It is understandable that no matter what method the signal line 702 is set to, the shortest distance between the signal line 702 and the antenna on the antenna layer 1 can be set within the range of 0.1mm to 5mm, so as to realize the signal line 702 and Effective transmission of signals between antennas.

9, in another possible implementation manner of the present application, the electronic device includes an appearance structure layer 3, an antenna layer 1, a touch layer 2, a display screen 4, and a printed circuit board (PCB 7). , It may also include a housing 8 which may but is not limited to a metal housing as long as it can realize signal transmission. Among them, the appearance structure layer 3, the antenna layer 1, the touch layer 2, and the display screen 4 can be bonded in sequence, the PCB 7 is arranged on one side of the display screen 4, and the housing 8 is arranged on the structure layer 3, the antenna layer 1, and The peripheral side of the layer structure formed by the touch layer 2 and the display screen 4.

In addition, the housing 8 can be, but not limited to, fixed to the PCB 7 by screws 703 and other fasteners, where the screws 703 and other fasteners are connected to the signal lines on the PCB 7, so that the signal lines can be connected to the PCB 7 through the screws 703 and the housing 8. Signal interaction of antennas on antenna layer 1. Wherein, the shortest distance between the housing 8 and the antenna on the antenna layer 1 can be set to 0.1 mm to 5 mm, so that the housing 8 and the antenna on the antenna layer 1 can transmit signals through capacitive coupling and feeding. In this way, direct connection between the signal line and the antenna layer 1 can be avoided, so as to avoid the problem of unstable impedance of the contact points directly contacting the electrical connection due to factors such as oxidation.

10, in another possible implementation manner of the present application, the electronic device includes an appearance structure layer 3, an antenna layer 1, a touch layer 2, a display screen 4, and a printed circuit board (PCB 7). Among them, the appearance structure layer 3, the antenna layer 1, the touch control layer 2, and the display screen 4 can be bonded in sequence, and the PCB 7 is arranged on one side of the display screen 4.

In order to realize the signal transmission between the antenna layer 1 and the PCB 7, in this implementation, a signal line 702 is provided on the side of the PCB 7 facing the display screen 4. The signal line 702 can be set as a metal shrapnel fixed to the PCB 7. Or set on the structural support 701 of the PCB 7.

In this embodiment, no matter which setting mode the signal line 702 is set to, the signal line 702 can be connected to the antenna on the antenna layer 1 through the signal cable 704. In addition, as shown in FIG. 10, the antenna on the antenna layer 1 and the touch trace on the touch layer 2 can share a signal cable 704, or set a signal for the antenna layer 1 and the touch layer 2 respectively. The cable 704 is connected so that the antenna and the touch wire are connected to the signal line 702 through different signal cables 704. It can be understood that the above are only some exemplary descriptions of the arrangement of the signal line 702 on the PCB 7.

In order to further enable the antenna arranged on the antenna layer and the touch trace arranged on the touch layer to work independently during signal transmission, they do not affect each other. It is also necessary to set the antenna of the touch screen and the touch wiring accordingly. The layer structure of the touch screen, mainly the structure of the antenna layer and the touch layer, will be described in detail below with reference to the drawings.

Referring to FIG. 11, FIG. 11 provides a touch screen. The touch screen may include an appearance structure layer 3, an antenna layer 1, a touch control layer 2 and a display screen 4 that are stacked. Wherein, the appearance structure layer 3 may be, but is not limited to, a glass layer, so as to achieve the appearance effect of the touch screen while playing a role of protecting the cover plate. The antenna layer 1 is provided with an antenna, the touch layer 2 is provided with touch traces, and the display screen 4 can be, but not limited to, an organic light emitting diode (OLED) display or a light emitting diode, LED) display screen. In addition, the specific bonding method between each layer structure is not limited, for example, the bonding can be performed by optically clear adhesive 5 (OCA).

12, when the antenna layer 1 is specifically arranged, the antenna layer 1 includes a substrate 6 and an antenna formed on the substrate 6 by metal mesh capacitive touch technology (metal mesh), where the substrate 6 may be polyethylene terephthalate Polyethylene terephthalate (PET) substrate conductive layer.

12, the specific steps of forming the antenna 101 on the above-mentioned substrate 6 may be as follows: First, according to the requirements of the specific location of the antenna 101 on the antenna layer 1, embossing or etching on the PET substrate 6 to form mutually crossing A plurality of third trenches 603; then, each third trench 604 is filled with liquid metal, where the liquid metal can be silver paste or copper paste; finally, the antenna 101 is formed after the liquid metal is cooled and solidified.

In addition, continuing to refer to FIG. 12, the size of the third trench 603 can be adjusted in the above process so that the line width L1 of the formed antenna 101 is 1-10 μm, and the line distance between two adjacent antennas 101 L3 is set to 1～300μm. Because the smaller the line width L1, the greater the square resistance, and the thicker the line (the height of the line in the trench of the substrate 6 is defined as the thickness of the line), the smaller the square resistance. In this way, the line width L1 can be adjusted and the third The height h1 of the antenna 101 in the groove 603 is to control the square resistance of the antenna 101 below 5 ohm/□. In this way, the radiation efficiency of the antenna 101 can be greatly improved, which is beneficial to improving the signal transmission performance of the antenna 101.

12, it can be seen that if the antenna 101 is only arranged on a certain part of the antenna layer 1, when the antenna layer 1 is used in the touch screen, the antenna 101 will block the local light, so that the part The display effect of is quite different from other parts, which affects the visual effect of the user's use, and the user experience is poor.

In order to solve the above problem, in this solution, referring to FIG. 13, the entire surface of the interlaced metal grid lines are formed on the antenna layer 1 through the above process steps, and then the portion opposite to the touch area of the touch layer 2 The metal mesh line of the antenna layer is disconnected (hereinafter, the disconnected metal mesh line on the antenna layer is referred to as the virtual antenna 102), and the metal mesh line used as the part of the antenna 101 is connected. Since the disconnected metal grid lines cannot transmit signals, it can not only avoid the influence of the metal grid lines in the touch area on the antenna layer 1 on the signal transmission of the touch trace 201, but also achieve touch control. The display uniformity of each part of layer 2 can achieve better visual effects.

In addition, the installation position of the antenna 101 can be selected according to specific needs or according to the arrangement of the various components of the touch screen. It can also be adjusted by adjusting the installation position of the antenna 101 so that the antenna 101 does not occupy the space of the frame of the electronic device. , So as to facilitate the realization of the design of the narrow frame of the electronic device. Optionally, referring to FIG. 13, the projection of the antenna 101 on the touch layer 2 may fall on the boundary of the touch area of the touch layer 2, or it may fall on the boundary between the touch area and the non-touch area. At this point, this can effectively reduce the influence of the signal transmission of the touch trace 201 on the touch layer 2 when the antenna 101 performs signal transmission.

Correspondingly, referring to FIG. 14, when the touch layer 2 is specifically formed, there may be multiple formation methods. For example, ITO is used to form a transparent touch electrode layer circuit on the touch layer 2. Alternatively, a solution similar to the steps of forming the antenna described above may be adopted, specifically: first, embossing or etching on the substrate 6 to form a plurality of fourth trenches 604 that intersect each other; then, filling each section with liquid metal Four trenches 604, in which the liquid metal can be silver paste or copper paste; finally, the liquid metal is cooled and solidified to form the touch trace 201. The difference from the above method of forming an antenna is that, referring to FIGS. 13 and 14 together, the touch trace 201 may be formed on the entire surface of the touch layer 2 and connected to each other, and a plurality of metal grids are interlaced. line.

In addition, continuing to refer to FIG. 14, when the touch trace 201 is a plurality of metal grid lines arranged in a staggered manner, the line width L2 of the formed touch trace 201 can also be set to 1-10 μm, and two adjacent ones The line distance L4 between the touch traces 201 is set to be 1 to 300 μm, and the height of the touch trace 201 formed in the fourth groove 604 is adjusted to control the square resistance of the touch trace 201 to 1005 Below ohm/□. Since the touch trace 201 does not have very high requirements on the square resistance during signal transmission, in this technical solution, the square resistance of the touch trace 201 is controlled within the above range, which can make it better On the other hand, the touch trace 201 can be easily processed and the processing technology can be easily controlled.

In this way, referring to FIG. 13, the antenna layer 1 and the touch layer 2 formed as described above can be adhered by OCA, and the structure formed by the adhesion is provided in the touch screen, refer to FIG. 15. It can be seen from FIG. 15 that the antenna 101 can be formed at the junction of the touch area 202 and the non-touch area 203, which can reduce the influence of the signal transmission of the touch trace when the antenna 101 performs signal transmission.

In addition, since the touch screen uses the intersection of the touch trace 201 as the touch sensing point 204, specifically, referring to FIG. 16, when a finger touches the touch sensing point 204, it can form a capacitive effect with the touch trace 201 , So as to achieve the touch sensing effect. Therefore, when the antenna is stacked on the touch layer, the projection of the antenna and the virtual antenna on the touch layer needs to be interlaced with the touch point 204, so that the touch sensing point 204 can be exposed, so that the antenna The touch sensing of the touch trace 201 is not affected during signal transmission.

In this solution, referring to FIG. 15, by arranging the antenna 101 and the virtual antenna 102 on the antenna layer of the touch screen at the same time, not only can the antenna 101 and the touch trace 201 arranged on the touch layer be in the signal transmission process In order to achieve a better signal transmission effect, the display uniformity of each part of the touch screen can also be achieved to achieve a better visual effect, which is beneficial to improve the user experience.

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this application, and they should all cover Within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A touch screen is characterized in that it comprises an appearance structure layer, an antenna layer, a touch layer and a display screen which are sequentially stacked, the touch layer having a touch area and a non-touch area, wherein:

The touch layer is provided with a plurality of touch traces, the plurality of touch traces cross each other, and a plurality of touch sensing points are formed in the touch area;

The antenna layer is provided with an antenna, and the projection of the antenna on the touch layer is interlaced with the plurality of touch sensing points.
The touch screen of claim 1, wherein the projection of the antenna on the touch layer falls on the boundary of the touch area of the touch layer; or, the antenna is on the touch layer The projection above falls on the junction of the touch area and the non-touch area of the touch layer.
The touch screen of claim 1 or 2, wherein the antenna layer has an antenna area and a non-antenna area, the antenna is disposed in the antenna area, the non-antenna area is disposed with a virtual antenna, and the virtual antenna The antenna is a metal grid line intermittently arranged.
The touch screen according to any one of claims 1 to 3, wherein the antenna is a plurality of metal grid lines arranged in a staggered manner; the touch trace is a plurality of metal grid lines arranged in a staggered manner, or A plurality of indium tin oxide electrode layer lines arranged staggered.
The touch screen according to claim 3 or 4, wherein the material of the metal grid lines is silver or copper.
The touch screen according to any one of claims 1 to 5, wherein the line width of the antenna is 1 to 10 μm, and the line distance between two adjacent antennas is 1 to 300 μm.
7. The touch screen according to any one of claims 1 to 6, wherein the square resistance of the antenna is less than 5 ohm/□.
The touch screen according to any one of claims 1 to 7, wherein the line width of the touch trace is 1-10 μm, and the line distance between two adjacent touch traces is 1- 300μm.
The touch screen according to any one of claims 1 to 8, wherein the square resistance of the touch trace is less than 1005 ohm/□.
A wearable device, characterized by comprising a printed circuit board and the touch screen according to any one of claims 1-9, the printed circuit board is arranged on one side of the display screen, and the printed circuit board The control circuit board is provided with a signal line, and the signal line is signal-connected with the antenna of the antenna layer.
9. The wearable device of claim 10, wherein the signal circuit is arranged on a structural support of the printed circuit board; or the signal circuit is a metal shrapnel arranged on the printed circuit board.
The wearable device according to claim 11, wherein the shortest distance between the signal line and the antenna on the antenna layer is 0.1 mm to 5 mm.
The wearable device according to claim 10, wherein the wearable device further comprises a housing, the housing is fixed to the printed circuit board by a fastener, and the signal line is connected to the fastener For connection, the shortest distance between the housing and the antenna on the antenna layer is 0.1 mm-5 mm.
9. The wearable device of claim 10, wherein the signal line is connected to the antenna through a signal cable, and the signal line is connected to the touch trace through another signal cable; or , The signal line is simultaneously connected to the antenna and the touch wire through a signal cable.