Touch screen and electronic devices

Abstract

The present application discloses a touch display screen and an electronic device, belonging to the technical field of electronic devices. The touch display screen of the present application includes a touch layer and a touch substrate, the touch layer includes a plurality of touch sensors arranged in an array, the plurality of touch sensors are arranged on the first surface of the touch substrate, and at least some of the plurality of touch sensors are provided with antenna contact points; the antenna contact points are electrically connected to a radio frequency integrated circuit, so that the touch sensors provided with the antenna contact points are formed into antenna electrodes. The scheme of the present application enables some touch sensors to have both touch function and antenna radiation function; in this way, the problem of mutual interference between the existing antenna layer and the touch layer due to overlap is solved, the antenna layer is avoided to be added to the touch display screen, and the thickness of the touch display screen is reduced; the user's touch experience and the radiation efficiency of the antenna are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a touch display screen and an electronic device. Background Art

[0002] With the rapid development of wireless communication technology, especially with the commercialization of 5G, the application scenarios of wireless communication systems are becoming more and more diverse, thus placing higher and higher requirements on antennas, one of the key components of wireless communication systems. With the rise of full-screen 5G and wireless communication products, the pursuit of the ultimate full-screen effect has led to the continuous compression of antenna space. Therefore, industry insiders have proposed the following: Figure 1 As shown, an antenna layer is arranged on the upper layer of the touch layer of the display screen. However, such a structure causes the antenna layer and the touch layer to overlap, resulting in mutual interference between the two, which makes the user's touch experience poor and reduces the radiation efficiency of the antenna. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a touch display screen and an electronic device, which can solve the problem that the existing touch layer and antenna layer overlap and cause mutual interference between the two, resulting in poor user touch experience and low antenna radiation efficiency.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a touch display screen, comprising a touch layer and a touch substrate, wherein the touch layer comprises a plurality of touch sensors arranged in an array, the plurality of touch sensors are disposed on a first surface of the touch substrate, and antenna contact points are disposed on at least some of the plurality of touch sensors;

[0006] The antenna contact point is electrically connected to a radio frequency integrated circuit, so that the touch sensor provided with the antenna contact point is formed as an antenna electrode.

[0007] In a second aspect, an embodiment of the present application further provides an electronic device, comprising the touch display screen as described in the first aspect, wherein a mainboard of the electronic device is electrically connected to the radio frequency integrated circuit and the touch integrated circuit respectively.

[0008] The touch display screen of the embodiment of the present application includes a touch layer and a touch substrate, the touch layer includes a plurality of touch sensors arranged in an array, the plurality of touch sensors are arranged on the first surface of the touch substrate, at least some of the plurality of touch sensors are provided with antenna contact points; the antenna contact points are electrically connected to the radio frequency integrated circuit, so that the touch sensors provided with antenna contact points are formed into antenna electrodes. The function multiplexing of the touch sensor is realized, that is, the touch sensor has both a touch function and an antenna radiation function; in this way, on the one hand, the problem of mutual interference between the existing antenna layer and the touch layer due to overlap is solved, and on the other hand, the antenna layer is avoided from being added to the touch display screen, and the thickness of the touch display screen is reduced; in this way, the user's touch experience and the radiation efficiency of the antenna are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of a touch display screen in the prior art;

[0010] Figure 2 is a schematic diagram of the structure of the touch layer of an embodiment of the present application;

[0011] Figure 3 is a schematic cross-sectional view of a touch display screen according to an embodiment of the present application;

[0012] Figure 4 is a schematic diagram of the positional relationship between the touch display screen, the radio frequency integrated circuit and the touch integrated circuit in an embodiment of the present application;

[0013] Figure 5 is a schematic diagram of the connection between the antenna electrode, the radio frequency integrated circuit and the touch control integrated circuit according to the embodiment of the present application;

[0014] Figure 6 It is a schematic diagram of the antenna array according to an embodiment of the present application being applied to radar angle measurement. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein.

[0017] like Figure 1 to Figure 5 As shown, an embodiment of the present application provides a touch display screen, including: a touch layer and a touch substrate, the touch layer includes a plurality of touch sensors 1 arranged in an array, the plurality of touch sensors are arranged on a first surface of the touch substrate, at least some of the plurality of touch sensors 1 are provided with antenna contact points 3; the antenna contact points 3 are electrically connected to a radio frequency integrated circuit 6, so that the touch sensors 1 provided with the antenna contact points 3 are formed into antenna electrodes 2.

[0018] Here, it should be noted that in the embodiment of the present application, the antenna contact point 3 is set on at least part of the touch sensor 1, so that the multiple antenna electrodes 2 formed can be arranged in the form of an array. In this way, this antenna electrode can overcome the problem of increasing path loss due to the increasing transmission rate and communication capacity of the wireless communication system, so that the carrier frequency is getting higher and higher.

[0019] Here, it should be noted that Figure 3 As shown, the touch display screen includes a display screen and a touch layer disposed on the display screen, a polarizer layer disposed on the touch layer, and a cover plate bonded to the polarizer layer by an adhesive; wherein the first surface of the touch substrate should be the surface of the touch substrate facing away from the display screen, that is, the touch layer of the embodiment of the present application is located between the polarizer and the display screen. The display screen includes a display area (dotted line frame area) and a non-display area (the area between the dashed line frame area and the solid line frame area), which is composed of Figure 2 It can be seen that the touch sensors are all located in the display area of ​​the display screen.

[0020] Specifically, the touch sensor can be a conductive layer with a certain degree of transparency, such as: Indiumtin Oxide (ITO) conductive glass, metal mesh, nano silver, etc. The cover plate can be glass or other transparent dielectric materials, such as: Colorless Polyimide (CPI), etc.; the adhesive can be OCA (Optically Clear Adhesive) optical glue. The touch substrate can be a transparent dielectric material with low dielectric constant and low loss, such as: optical material COP, polyester resin (Polyethylene Terephthalate, PET), etc., so as to avoid the influence of the touch layer on the display effect of the touch display screen.

[0021] The touch display screen of the embodiment of the present application includes a touch layer and a touch substrate, the touch layer includes a plurality of touch sensors arranged in an array, the plurality of touch sensors are arranged on the first surface of the touch substrate, at least some of the plurality of touch sensors are provided with antenna contact points; the antenna contact points are electrically connected to the radio frequency integrated circuit, so that the touch sensors provided with antenna contact points are formed into antenna electrodes. The functional reuse of the touch sensor is realized, that is, the touch sensor has both a touch function and an antenna radiation function; in this way, firstly, the problem of mutual interference between the existing antenna layer and the touch layer due to overlap is solved; secondly, the addition of an antenna layer to the touch display screen is avoided, and the thickness of the touch display screen is reduced; in this way, the user's touch experience and the radiation efficiency of the antenna are improved; thirdly, the plurality of antenna electrodes can form a phased array antenna to overcome the current problem of increasing path loss.

[0022] As an optional implementation, Figure 3 As shown, a conductive metal layer is disposed on the second surface of the touch substrate; wherein the second surface and the first surface are two opposite surfaces.

[0023] That is to say, in the embodiment of the present application, a conductive metal layer is also coated on the entire bottom surface of the touch substrate, and the conductive metal layer can be used as the ground of the antenna electrode to isolate the antenna electrode from the display screen, shielding the influence of the display screen's circuit on the antenna radiation performance, thereby improving the antenna's radiation performance; similarly, the conductive metal layer can also shield the influence of the display screen's circuit on the touch function, improve the touch sensitivity, and thus enhance the user's touch experience.

[0024] Specifically, the conductive metal layer is a transparent conductive metal layer. The material of the conductive metal layer may be, for example, ITO conductive glass, metal mesh, nano silver, etc. In this way, the influence of the conductive metal layer on the display effect of the display screen is reduced.

[0025] As an optional implementation, the distance between the antenna electrode 2 and the RF integrated circuit 6 is less than a first distance, which is the distance between the first touch sensor and the RF integrated circuit 6, and the first touch sensor is a touch sensor 3 other than the touch sensor corresponding to the antenna electrode.

[0026] In this optional implementation, by setting the distance between the antenna electrode and the RF integrated circuit to be smaller than the first distance between the first touch sensor and the RF integrated circuit 6, the antenna electrode 2 is the touch sensor closest to the RF integrated circuit 6 among the multiple touch sensors arranged in an array, thereby making the path between the antenna electrode 2 and the RF integrated circuit 6 the shortest. In this way, the path loss can be effectively reduced and the radiation performance of the antenna can be improved.

[0027] Here, it should be noted that the RF integrated circuit 6 can be arranged on a flexible printed circuit (FPC), and the antenna electrode 2 is electrically connected to the RF integrated circuit 6 through the FPC 8. As a specific example, Figure 2 and Figure 4 As shown, Figure 2 In the embodiment, a bonding area 5 is provided at the lower end of the touch screen, the antenna electrode 2 is connected to the bonding area 5 through the antenna conductive line, and the pins of the FPC 8 are welded to the bonding area 5 through the SMT process, thus realizing the electrical connection between the antenna electrode 2 and the radio frequency integrated circuit 6. Figure 4 As shown, after the antenna electrode 2 is electrically connected to the RF integrated circuit 7, the FPC 8 can be bent so that the orthographic projection of the RF integrated circuit 6 is located in the display area of ​​the touch display screen. Figure 2 and Figure 4 It can be seen that when the bonding area 5 connected to the RFIC 6 is located at the lower end of the touch display screen, the touch sensor 1 formed as the antenna electrode 2 is the touch sensor close to the lower end of the touch sensors 1 arranged in an array. When selecting the touch sensor as the antenna electrode, it can be determined according to the specific position of the RFIC 6 on the FPC 8. Figure 4 It should be a bottom view of the touch screen, therefore, the orthographic projection of the RF integrated circuit 6 on the touch screen should be located at the lower right corner of the touch screen (relative to the position where the user uses the touch screen). Figure 2 It should be a top view of the touch layer, and it can be seen that Figure 2 The antenna electrode 2 determined in the figure is the touch sensor closest to the radio frequency integrated circuit 6 .

[0028] That is to say, in the embodiment of the present application, the touch sensor with multiple functions can be determined among the multiple touch sensors arranged in an array on the touch layer according to the position of the RF integrated circuit 6. For example, if the bonding area 5 is located at the upper end of the touch display screen, the touch sensor close to the upper end of the multiple touch sensors arranged in an array can be used as an antenna electrode.

[0029] As an optional implementation, the distance between the antenna contact point 3 and the first edge of the antenna electrode 2 is smaller than the distance between the antenna contact point 3 and the second edge of the antenna electrode 2, the first edge is the edge of the antenna electrode 2 that is closest to the radio frequency integrated circuit 6, and the second edge is the edge of the antenna electrode 2 other than the first edge.

[0030] In this optional implementation, the antenna contact 3 is arranged near the edge of the antenna electrode 2 closest to the RFIC 6, so that the path from the antenna contact 3 to the RFIC 6 is further shortened to reduce the path loss of the antenna and improve the radiation performance of the antenna. Figure 2 and Figure 4 As shown, when the RF integrated circuit 6 is connected to the antenna electrode 2 through the bonding area 5 at the lower end of the touch display screen, the antenna contact point 3 is set near the lower edge of the antenna electrode 2, such as near the center position of the lower edge.

[0031] As an optional implementation, the antenna contact point 3 and the radio frequency integrated circuit 6 are connected via an antenna conductive circuit disposed inside the touch control substrate.

[0032] That is to say, in this optional implementation, the antenna contact point 3 can be a metal via, so that the antenna contact point 3 can be electrically connected to the antenna conductive circuit inside the touch substrate, and connected to the radio frequency integrated circuit 6 through the antenna conductive circuit. In this way, the antenna contact point 3 and the radio frequency integrated circuit 6 are avoided from being connected through the circuit of the non-display area of ​​the touch display screen, thereby reducing the area of ​​the non-display area and improving the aesthetics of the screen; in addition, the width of the touch conductive circuit can be set between 30μm and 100μm.

[0033] As an optional implementation, Figure 2 As shown, each touch sensor 1 is provided with a touch contact point 4 , and the touch contact point 4 is connected to the touch integrated circuit 7 through a touch conductive circuit inside the touch substrate.

[0034] Here, it should be noted that since the frequency of the touch signal is lower than the frequency of the antenna signal, the transmission path length of the touch signal has little effect on the touch performance. Figure 2 As shown, when the bonding area 5 is located at the lower end of the touch display screen, the touch contact point 4 can be set on the side of the touch sensor 1. Of course, in the embodiment of the present application, the touch contact point 4 can be set at any position of the touch sensor 1 while ensuring that the path between the antenna contact point 3 and the radio frequency integrated circuit 6 is the shortest. Similarly, burying the touch conductive circuit inside the touch substrate also avoids setting the touch conductive circuit in the non-display area of ​​the touch display screen to achieve the connection between the touch contact point 4 and the touch integrated circuit 7, thereby reducing the area of ​​the touch non-display area and improving the aesthetics of the touch display screen; in addition, the width of the touch conductive circuit can be set between 30μm and 100μm.

[0035] As an optional implementation, Figure 5 As shown, a capacitor C is connected in series between the antenna contact point 3 and the radio frequency integrated circuit 6 ; and an inductor L is connected in series between the touch contact point 4 of the antenna electrode 2 and the touch integrated circuit 7 .

[0036] Since the frequency of the antenna signal is relatively high, and the capacitor has the characteristic of passing high frequencies and blocking low frequencies (equivalent to a path for high-frequency signals, and equivalent to an open circuit for low-frequency signals and DC signals); the frequency of the touch signal is relatively low, and the inductor signal has the characteristic of passing low frequencies and blocking high frequencies (equivalent to a path for low-frequency signals and DC signals, and equivalent to an open circuit for high-frequency signals); therefore, in this optional implementation, a capacitor C is connected in series between the antenna contact point 3 and the radio frequency integrated circuit 6; and an inductor L is connected in series between the touch contact point 4 of the antenna electrode 2 and the touch integrated circuit 7. In this way, the touch signal in the antenna signal path and the antenna signal in the touch signal path are blocked, so that the touch signal and the antenna signal have no influence on each other, thereby realizing the multiplexing of the touch function and the antenna function of the touch sensor.

[0037] Here, it should be noted that, since there is a difference in touch experience between a touch sensor with an antenna function and a touch sensor with only a touch function, this difference can be avoided and compensated by a software algorithm.

[0038] As an optional implementation, a plurality of antenna electrodes 2 constitute an antenna array.

[0039] Multiple antenna electrodes 2 are formed into an antenna array, which can be applied to 5G millimeter wave communication to achieve high-speed and low-latency wireless communication; it can also be applied to millimeter wave gesture radar to achieve air gesture operation and realize a new human-computer interaction experience.

[0040] Here, the first thing that needs to be explained is that millimeter-wave radar can measure the distance, speed and angle of the target object; among them, the complete millimeter-wave radar system includes analog components such as transmitting antenna TX, receiving antenna RX, RF components and clocks, as well as digital components such as analog-to-digital converters, microcontrollers and digital signal processors. Specifically, the millimeter-wave radar system can use the horizontal plane to estimate the angle of the reflected signal, which is also called the angle of arrival. A small change in the distance of the object can cause a phase change in the peak of the distance fast Fourier change FFT or Doppler FFT, and the change in phase can calculate the angle of arrival. To calculate the angle of arrival, at least two receiving antennas are required. If 3D gesture recognition is to be implemented, at least two antennas are required in both the X and Y directions, combined with Figure 6 The calculation process is explained as follows: the angle of arrival is obtained based on the distance between the two receiving antennas, the phase difference of the reflected echoes received by the two antennas, and the trigonometric function; the specific calculation formula is as follows:

[0041]

[0042] Where l is the distance between the two receiving antennas RX1 and RX2, θ is the arrival angle, ΔΦ is the phase difference, λ is the radar signal transmission speed; Δd is the distance difference of the reflected echo received by the two receiving antennas.

[0043] Here, it should also be noted that in the touch display screen of the embodiment of the present application, the number and position of the touch sensors with functional reuse can be selected according to actual needs and are not limited to the above-mentioned specific implementation method of the present application.

[0044] The touch display screen of the embodiment of the present application, firstly, by setting antenna contact points 3 on part of the touch sensors and electrically connecting the antenna contact points to the radio frequency integrated circuit 6, and connecting the touch contact points 4 set on the touch sensor 1 to the touch integrated circuit 7, the touch sensor can be used as a conventional touch sensor and also as an antenna; therefore, there is no need to add an additional antenna layer on the touch display screen, which reduces the thickness of the touch display screen; secondly, by coating a transparent conductive metal layer on the lower surface of the touch substrate, the conductive metal layer can be used as the ground of the antenna, effectively shielding the influence of the line of the display screen on the touch function and the radiation performance of the antenna, and effectively improving the touch sensitivity and the radiation performance of the antenna; thirdly, the touch sensor close to the bonding area 5 is designed as a function-reuse sensor, so that the antenna The path between the antenna and the RF integrated circuit is the shortest, which effectively reduces the path loss and improves the radiation performance of the antenna; fourthly, the antenna conductive circuit and the touch conductive circuit are arranged in the touch substrate, so that the routing is not arranged in the non-display area of ​​the display screen, thereby reducing the area of ​​the non-display area and improving the aesthetics of the screen; fifthly, multiple antenna electrodes constitute an antenna array, which is suitable for 5G millimeter wave communication and realizes high-speed and low-latency wireless communication. At the same time, it can be applied to millimeter wave radar to realize air gesture control, thereby providing a new human-computer interaction experience; sixthly, a capacitor is connected in series between the antenna contact point and the RF integrated circuit, and a resistor is connected in series between the touch contact point on the antenna electrode and the touch integrated circuit, so that the touch signal and the antenna signal have no influence on each other, further improving the touch performance and the radiation performance of the antenna.

[0045] An embodiment of the present application also provides an electronic device, including a radio frequency integrated circuit and a touch integrated circuit. The electronic device also includes the touch display screen as described above. The mainboard of the electronic device is electrically connected to the radio frequency integrated circuit and the touch integrated circuit respectively.

[0046] It should be noted that the mainboard is also connected to the touch integrated circuit.

[0047] Specifically, one or more connectors 9 are provided on the FPC 8 provided with the radio frequency integrated circuit and the touch integrated circuit. The radio frequency integrated circuit and the touch integrated circuit can each use one connector 9 or share one connector 9. Through the connector and the board-to-board (BTB) connector on the mainboard, the mainboard and the radio frequency integrated circuit and the touch integrated circuit are electrically connected.

[0048] It should also be noted here that the electronic device of the embodiments of the present application can be a smart phone, a smart watch, a smart glasses, a SAR and a HAC, and other electronic devices that are safe and healthy for the human body and can be worn (such as a hearing aid or a heart rate regulator, etc.).

[0049] In addition, the embodiments of the present application can also be applied to wireless inter-city network WMAN, wireless wide area network WWAN, wireless local area network WLAN, wireless personal network WPAN, multiple-input multiple-output MIMO, radio frequency identification RFID, and even near-field communication NFC, wireless charging WPC or FM and other wireless communication designs and applications.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0052] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0053] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A touch display screen, comprising a touch layer and a touch substrate, wherein the touch layer comprises a plurality of touch sensors arranged in an array, and the plurality of touch sensors are disposed on a first surface of the touch substrate, wherein: At least some of the touch sensors among the plurality of touch sensors are provided with antenna contact points; wherein the antenna contact points are metal vias on the touch sensors; The antenna contact point is electrically connected to the radio frequency integrated circuit, so that the touch sensor provided with the antenna contact point is formed into an antenna electrode; The distance between the antenna electrode and the radio frequency integrated circuit is less than a first distance, the first distance is the distance between a first touch sensor and the radio frequency integrated circuit, and the first touch sensor is a touch sensor other than the touch sensor corresponding to the antenna electrode; The distance between the antenna contact point and the first edge of the antenna electrode is smaller than the distance between the antenna contact point and the second edge of the antenna electrode. The first edge is the edge of the antenna electrode that is closest to the radio frequency integrated circuit, and the second edge is the edge of the antenna electrode other than the first edge.

2. The touch display screen according to claim 1, characterized in that: A conductive metal layer is disposed on the second surface of the touch substrate, and the conductive metal layer serves as a ground for the antenna electrode; wherein the second surface and the first surface are two opposite surfaces.

3. The touch display screen according to claim 2, characterized in that: The conductive metal layer is a transparent conductive metal layer.

4. The touch display screen according to claim 1, characterized in that: The antenna contact point and the radio frequency integrated circuit are connected via an antenna conductive circuit disposed inside the touch control substrate.

5. The touch display screen according to claim 1, characterized in that: Each of the touch sensors is provided with a touch contact point, and the touch contact point is connected to the touch integrated circuit through a touch conductive circuit inside the touch substrate.

6. The touch display screen according to claim 5, characterized in that: A capacitor is connected in series between the antenna contact point and the radio frequency integrated circuit; and an inductor is connected in series between the touch contact point of the antenna electrode and the touch integrated circuit.

7. The touch display screen according to claim 1, characterized in that: A plurality of the antenna electrodes constitute an antenna array.

8. An electronic device, comprising a radio frequency integrated circuit and a touch control integrated circuit, characterized in that: It also includes the touch display screen according to any one of claims 1 to 7, and the mainboard of the electronic device is electrically connected to the radio frequency integrated circuit and the touch integrated circuit respectively.

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