WO2021233288A1

WO2021233288A1 - Touch display screen and electronic device

Info

Publication number: WO2021233288A1
Application number: PCT/CN2021/094337
Authority: WO
Inventors: 邾志民; 马荣杰; 王义金; 简宪静
Original assignee: 维沃移动通信有限公司
Priority date: 2020-05-20
Filing date: 2021-05-18
Publication date: 2021-11-25
Also published as: CN111562860B; CN111562860A

Abstract

Disclosed in the present application are a touch display screen and an electronic device. The touch display screen comprises: a touch layer, a display layer, at least one first feed line structure, and a dielectric layer. At least one annular opening is formed in the touch layer; the first feed line structure and the dielectric layer are located between the display layer and the touch layer, and the dielectric layer is located between the first feed line structure and the touch layer; an orthographic projection area of the first feed line structure on the touch layer is arranged across an inner ring and an outer ring of the annular opening.

Description

Touch screen and electronic equipment

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010431916.8 filed in China on May 20, 2020, the entire content of which is incorporated herein by reference.

Technical field

This application relates to the technical field of electronic products, and in particular to a touch display screen and electronic equipment.

Background technique

With the rapid development of wireless communication technology, especially with the development of the fifth-generation mobile communication technology (5th-Generation, 5G), the application scenarios of the wireless communication system are becoming more and more abundant, thus making it difficult for one of the key components of the wireless communication system. The requirements for antennas are getting higher and higher. On the one hand, in some application scenarios, antennas need to have conformality, concealment, and security in order to be integrated into wireless products such as cars, smart wearables, and smart homes; on the other hand, as the transmission rate of wireless communication systems is increasing The higher the communication capacity, the higher the carrier frequency, and the higher the path loss caused by the higher carrier frequency, which leads to the need for the array antenna to increase the gain to overcome the influence of the path loss, and in order to meet the high The gain can be beam scanning or beamforming at the same time, which requires phased antenna array technology, which requires the integration of more and more antennas in a limited space.

In order to be able to integrate more and more antennas in a limited space, it is necessary to open up other antenna spaces on the basis of traditional antenna design methods, such as: screen integrated antenna, that is, the design of the antenna on the screen, the design of the screen with antenna, etc. Especially with the rise of full-screen 5G wireless communication products, the number of antennas is increasing, and the pursuit of the ultimate full-screen effect has caused the space of the antenna to be continuously compressed, so the integration of transparent antennas on the screen becomes more and more urgent. . At present, the millimeter wave antenna on the screen is generally set on the upper layer of the display screen. This design can only be applied to display screens without a touch layer, such as televisions, advertising screens, etc. The design of the antenna under the screen is affected by the type of display screen. limits.

Summary of the invention

The embodiments of the present application provide a touch display screen and an electronic device to solve the problem that the current antenna on-screen design can only be applied to a display screen without a touch layer and is limited by the type of the display screen.

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

In the first aspect, an embodiment of the present application provides a touch display screen, including:

Display layer

A touch control layer, the touch control layer is provided with at least one annular opening;

At least one first feeder structure and a dielectric layer, the first feeder structure and the dielectric layer are located between the display layer and the touch layer, and the dielectric layer is located between the first feeder structure and the Between touch layers;

Wherein, the orthographic projection area of the first feed line structure on the touch layer is arranged across the inner ring and the outer ring of the annular opening.

In the second aspect, an embodiment of the present application also provides an electronic device, including the touch display screen as described above.

In this way, in the above-mentioned solution of the present application, the slot antenna is made by opening a ring-shaped opening on the touch layer, and arranging a dielectric layer and a first feeder structure below the touch layer, so that the feeder of the first feeder structure is connected To excite the slot antenna to radiate the antenna signal, so that the antenna structure can be integrated on the touch screen with the touch layer, and there is no need to add an additional wiring layer above the touch layer to avoid affecting the performance of the screen touch layer .

Description of the drawings

FIG. 1 shows one of the schematic diagrams of a touch display screen according to an embodiment of the present application;

FIG. 2 shows the second schematic diagram of the touch display screen of the embodiment of the present application;

FIG. 3 shows one of the schematic diagrams of the first feeder structure of the embodiment of the present application;

FIG. 4 shows the second schematic diagram of the first feeder structure of the embodiment of the present application;

FIG. 5 shows a schematic diagram of a second feeder structure according to an embodiment of the present application;

Fig. 6 shows a schematic diagram of a flexible circuit board according to an embodiment of the present application;

FIG. 7 shows a schematic diagram of an S parameter diagram of a slot antenna according to an embodiment of the present application;

FIG. 8 shows an efficiency diagram of a slot antenna according to an embodiment of the present application;

Fig. 9 shows a radiation pattern of a single slot antenna according to an embodiment of the present application.

Description of reference signs:

1. Touch layer; 11. Annular opening;

2. Display layer;

3. The first adhesive layer;

4. The first feeder structure; 41, the first sub-feeder structure; 411, the first impedance transformation structure; 412, the first microstrip feeder; 42, the second sub-feeder structure; 421, the second impedance transformation structure; 422, the first Two microstrip feeders; 43. The third sub-feeder structure; 431. The third impedance transformation structure; 432. The third microstrip feeder; 44. The fourth sub-feeder structure; 441. The fourth impedance transformation structure; 442. The fourth microstrip feeder. With feeder

5. Polarizer;

6. The second adhesive layer;

7. Glass cover plate;

8. Foam;

9. Second feeder structure; 91, metal ground; 92, first substrate; 93, strip feeder; 94, second substrate; 941, through hole; 95, coplanar waveguide; 951, antenna feed point;

10. Flexible circuit board; 100, display chip; 101, touch chip; 102, connector.

Detailed ways

Hereinafter, exemplary embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the application and to fully convey the scope of the application to those skilled in the art.

As shown in FIG. 1 and FIG. 2, an embodiment of the present application provides a touch display screen, which includes: a touch layer 1, a display layer 2, at least one first feeder structure 4, and a dielectric layer.

The touch layer 1 is provided with at least one annular opening 11; the first feed line structure 4 and the dielectric layer are located between the display layer 2 and the touch layer 1, and the dielectric layer is located between the first feed line structure 4 and the touch layer 1 Wherein, the orthographic projection area of the first feeder structure 4 on the touch layer 1 straddles the inner ring and the outer ring of the annular opening 11.

Optionally, the length of the annular opening 11 on the touch layer 1 can be about half the wavelength of the medium, and the width dimension is small. The specific size of the annular opening 11 can also be adjusted according to impedance matching conditions.

Optionally, the width of the annular opening 11: that is, the vertical distance between the inner ring and the outer ring can be the same; one annular opening 11 can divide the touch layer 1 into: the first area (or It is said that the first area surrounded by the inner ring) and the second area located outside the outer ring; the orthographic projection of the first feeder structure 4 on the touch layer 1 straddles the inner ring and the outer ring of the annular opening 11 It is understood that the orthographic projection area of one end of the first feeder structure 4 on the touch layer 1 spans the annular opening 11 in the width direction, that is, the orthographic projection area of one end of the first feeder structure 4 on the touch layer 1 They are in the first area, in the area of the annular opening 11 and in the second area in sequence.

Optionally, the annular opening 11 is located in a non-sensitive area of the touch layer 1; wherein, the non-sensitive area may refer to an area on the touch screen with a probability of being touched less than a preset threshold or not being touched. Thereby, the influence on the touch function of the touch display screen can be reduced.

For example, the non-sensitive area may be the area corresponding to the black border area of the touch display screen, or the non-sensitive area may also be: the area corresponding to the display area of the status bar of the touch display screen. Limited by this.

Optionally, the shape of the annular opening 11 may be a square ring, a circular ring, a rectangular ring, or the like.

Optionally, the touch layer 1 may be an indium tin oxide (ITO) touch layer or the like, and the application is not limited thereto.

Optionally, the display layer 2 may include an upper glass and a lower glass, and a display material (such as liquid crystal, etc.) arranged between the upper glass and the lower glass, or the display layer 2 may also emit light through semiconductors. This application does not Limited by this.

Optionally, one annular opening 11 can correspond to one dielectric layer; for example, when the number of annular openings 11 is greater than 1, the annular opening 11 and the dielectric layer can be arranged in one-to-one correspondence, or there can be multiple ones. The annular opening 11 is arranged corresponding to a dielectric layer. For example, in an array antenna composed of slot antennas corresponding to a plurality of annular openings 11, one row or column of annular openings corresponds to one dielectric layer, etc. The embodiment of the present application is not limited thereto.

Among them, an annular opening 11, a first feeder structure 4 corresponding to the annular opening 11 (for example, the orthographic projection area straddles the first feeder structure of the inner ring and the outer ring of the annular opening 11), and The dielectric layer between the two can be formed as a slot antenna.

Optionally, as an implementation manner: the dielectric layer may be a dielectric substrate disposed between the first feeder structure 4 and the touch layer 1, such as a liquid crystal polymer (LCP) substrate, etc.; of course, It is also possible to use a substrate made of other materials, which can be used as a dielectric substrate of an antenna, and the embodiment of the present application is not limited thereto.

Optionally, as another implementation manner: the touch display screen may further include: a first adhesive layer 3; the display layer 2 is connected to the touch layer 1 through the first adhesive layer 3, and the first adhesive layer 3 The portion extending between the touch layer 1 and the first feed line structure 4 forms the dielectric layer.

Optionally, the first adhesive layer 3 may be a special adhesive for bonding transparent optical elements (such as lenses, etc.), such as optically clear adhesive (OCA), optically clear resin (optical clear resin, etc.). Resin, OCR) and so on.

For example: a ring-shaped opening 11 is opened on the touch layer 1 to serve as a slot for the slot antenna (that is, the touch layer 1 can be used as an antenna ground), and the first feeder structure 4 of the slot antenna is fixed to the slot antenna through the first adhesive layer 3 The bottom of the touch layer 1 and the side of the touch layer 1 connected with the first feeder structure 4 are bonded to the display layer 2 through the first adhesive layer 3.

Optionally, when the number of the annular opening 11 is greater than 1, the slot antennas corresponding to the annular opening 11 are arranged according to a predetermined rule to form an antenna array.

Optionally, when the number of annular openings 11 is greater than 1, one annular opening 11 may correspond to at least one first feeder structure 4, for example, one annular opening 11 corresponds to one first feeder structure 4, or one annular opening 11 corresponds to one first feeder structure 4. The opening 1 corresponds to two first feeder structures 4, or one annular opening 1 corresponds to four first feeder structures 4, etc. The embodiment of the present application is not limited thereto.

Optionally, the slot antenna corresponding to the annular opening 11 may be a millimeter wave slot antenna.

In the embodiment of the present application, a slot antenna is made by opening a ring-shaped opening 11 on the touch layer 1, and arranging a dielectric layer and the first feeder structure 4 under the touch layer 1, so that the slot antenna is connected to the first feeder structure The feed source excites the slot antenna to radiate the antenna signal, so that the antenna structure can be integrated on the touch display screen with the touch layer 1, and there is no need to add an additional wiring layer above the touch layer to avoid affecting the screen touch The performance of the layer, so as to achieve the communication function of the on-screen antenna without affecting the touch function, and can also reduce the difficulty of process processing.

In addition, by opening a ring-shaped opening 11 on the touch layer 1, and arranging a dielectric layer and a first feeder structure 4 under the touch layer 1 to make a slot antenna, an antenna array can also be formed without a separate integrated antenna. Module packaging (Antenna in Package, AiP) modules, thereby effectively saving space.

Optionally, as an implementation manner: one annular opening 11 may correspond to one first feeder structure 4, that is, the slot antenna formed by one annular opening 11 may adopt single-ended feeding.

Optionally, the first feeder structure 4 may include: an impedance transformation structure and a microstrip feeder; the first end of the microstrip feeder is connected to the impedance transformation structure; the end of the first feeder structure 4 where the impedance transformation structure is located is on the touch layer The orthographic projection area on 1 straddles the inner ring and outer ring of the annular opening 11.

For example: the orthographic projection area of the impedance transformation structure on the touch layer 1 straddles the inner ring and the outer ring of the annular opening 11; or, the orthographic projection area of the impedance transformation line on the touch layer 1 is located on the annular opening 11 The area enclosed by the inner ring; or, a part of the orthographic projection area of the impedance transformation line on the touch layer 1 is located in the area enclosed by the inner ring of the annular opening 11, and the other part is located in a partial area of the annular opening, etc.

Optionally, as another implementation manner: as shown in FIG. 3, the annular opening 11 is symmetrical with respect to the first axis; for example, in the case where the shape of the annular opening 11 is, the first symmetry axis may be rectangular in length If the annular opening 11 is elliptical, the first axis of symmetry may be the long axis of the ellipse.

Optionally, the at least one first feeder structure includes: a first sub-feeder structure 41 and a second sub-feeder structure 42.

The orthographic projection area of the first sub-feeder structure 41 on the touch layer 1 straddles the inner ring and the outer ring of the first position of the annular opening 11; the orthographic projection area of the second sub-feeder structure 42 on the touch layer 1 The inner ring and the outer ring straddling the second position of the annular opening 11; wherein the first position and the second position are symmetrical with respect to the first axis.

In this way, the slot antenna formed by the annular opening 11 can realize differential feeding through the first sub-feeder structure 41 and the second sub-feeder structure, thereby improving the radiation performance of the antenna.

Optionally, the first sub-feeder structure 41 may include: a first impedance transformation structure 411 and a first microstrip feeder 412.

The first end of the first microstrip feeder 412 is connected to the first impedance transformation structure 411, and the second end of the first microstrip feeder 412 is connected to the feed source; one end of the first sub-feeder structure 41 where the first impedance transformation structure 411 is located , The orthographic projection area on the touch layer 1 straddles the inner ring and the outer ring of the annular opening 11. For the specific form, please refer to the description in the above embodiment, which will not be repeated here.

Optionally, the second sub-feeder structure 42 may include: a second impedance transformation structure 421 and a second microstrip feeder 422.

The first end of the second microstrip feeder 422 is connected to the second impedance transformation structure 421, and the second end of the second microstrip feeder 422 is connected to the feed source; where the second impedance transformation structure 421 in the second sub-feeder structure 42 is located At one end, the orthographic projection area on the touch layer 1 straddles the inner ring and the outer ring of the annular opening 11. For the specific form, please refer to the description in the above embodiment, which will not be repeated here.

The purpose of the impedance transformation structure is to achieve better impedance matching. Specifically, the shape of the impedance transformation structure may also be a circle, a trapezoid, a triangle, etc., and the embodiment of the present application is not limited thereto.

Optionally, as yet another implementation manner: as shown in FIG. 4, the annular opening 11 may be symmetrical with respect to the first axis and the second axis, and the second axis is perpendicular to the first axis; optionally, the annular opening 11 The shape of the hole 11 may be square, round, or the like.

Two feeder ports perpendicular to each other are used for feeding. For example, the at least one first feeder structure includes: a first sub-feeder structure 41, a second sub-feeder structure 42, a third sub-feeder structure 43, and a fourth sub-feeder structure 44. Among them, the first sub-feeder structure 41 and the second sub-feeder structure 42 constitute a horizontally polarized feeder; the third sub-feeder structure 43 and the fourth sub-feeder structure 44 constitute a vertically polarized feeder.

The orthographic projection area of the third feeder structure 43 on the touch layer 1 straddles the inner ring and the outer ring at the third position of the annular opening 11; the orthographic projection area of the fourth feeder structure 44 on the touch layer 1 The inner ring and the outer ring straddling the fourth position of the annular opening 11; wherein the third position and the fourth position are symmetrical with respect to the second axis.

The third sub-feeder structure 43 may include: a third impedance transformation structure 431 and a third microstrip feeder 432.

The first end of the third microstrip feeder 432 is connected to the third impedance transformation structure 431, and the second end of the third microstrip feeder 432 is connected to the feed source; where the third impedance transformation structure 431 in the third sub-feeder structure 43 is located At one end, the orthographic projection area on the touch layer 1 straddles the inner ring and the outer ring of the annular opening 11. For the specific form, please refer to the description in the above embodiment, which will not be repeated here.

Optionally, the fourth sub-feeder structure 44 may include: a fourth impedance transformation structure 441 and a fourth microstrip feeder 442.

The first end of the fourth microstrip feeder 442 is connected to the fourth impedance transformation structure 441, and the second end of the fourth microstrip feeder 442 is connected to the feed source; where the fourth impedance transformation structure 441 in the fourth sub-feeder structure 44 is located At one end, the orthographic projection area on the touch layer 1 straddles the inner ring and the outer ring of the annular opening 11. For the specific form, please refer to the description in the above embodiment, which will not be repeated here.

It should be noted that the position where the feeder structure feeds into the annular opening 11 in the embodiment of the present application is at its central position; specifically, the position of the connection point (antenna feed point) can also be adjusted according to actual needs. The embodiment of the present application does not Limited by this.

As shown in FIGS. 1 and 2, optionally, the touch display screen may further include: a polarizer 5 and a cover glass 7. The polarizer 5 is arranged on the side of the touch layer 1 away from the display screen 2; the cover glass 7 is arranged on the side of the polarizer 5 away from the touch layer 1.

The optional glass cover plate 7 can be adhered to the side of the polarizer 5 away from the touch layer 1 through the second adhesive layer 6 or the like. For example, the second adhesive layer 6 can be OCA or OCR glue.

Due to the presence of a glass cover with large dielectric constant and dielectric loss on the display screen (the typical values of the dielectric constant and loss tangent angle of the glass cover are 6.9 and 0.034), there are obvious beam distortion problems on the screen. In this way, the loop slot antenna (such as the millimeter wave loop slot antenna) in the embodiment of the present application can effectively improve the radiation performance of the millimeter wave antenna and reduce the distortion caused by the glass to the pattern by adopting a differential feeding method.

Preferably, the shape of the annular opening 11 may preferably be a symmetrical pattern such as a square, a circle, etc., so that the annular slot antenna can obtain dual polarization performance by increasing the mutually perpendicular feeder structure, thereby improving the radiation performance of the antenna and reducing the glass pair. Distortion caused by the pattern.

Optionally, the touch display screen may also include: foam 8. The foam 8 is disposed on the side of the display layer 2 away from the touch layer 1.

As shown in FIG. 5, optionally, the touch display screen further includes: a second feeder structure 9.

The first end of the second feeder structure 9 is connected to the first feeder structure 4, and the second end of the second feeder structure 9 is connected to the feed source.

Optionally, the second feeder structure 9 includes: a metal ground layer 91, a first substrate 92, a strip feeder 93, a second substrate 94 and a coplanar waveguide 95.

The metal ground layer 91 is provided on the first surface of the first substrate 92; the strip feeder 93 is provided between the second surface of the first substrate 92 and the first surface of the second substrate 94; the second substrate 94 is provided with a through hole 941 The coplanar waveguide 95 is provided on the second surface of the second substrate 94, and the first end of the coplanar waveguide 95 is connected to the first end of the strip feeder 93 through the through hole 941, and the second end of the coplanar waveguide 95 is connected to the first end of the A feeder structure 4 is connected, and the second end of the strip feeder 93 is connected to the feed source.

Among them, the feed source may be provided by a radio frequency integrated circuit (RFIC).

Optionally, the strip feeder 93 can be a fully enclosed feed structure, which can be made by fabricating the strip feeder on a metal plate; the second end of the coplanar waveguide 95 is formed as an antenna feed point 951, and the antenna feed point 951 is used for To connect with the first feeder structure 4, a coplanar waveguide can be fabricated on a metal plate. The through hole 941 may be a metal via formed on the second substrate 94. The first substrate 92 and the second substrate 94 may be LCP substrates.

The second feeder structure 9 in the embodiment of the present application adopts an LCP feeder structure based on a stripline 93 (strip line) to a coplanar waveguide (CPW) to provide a slot antenna formed on the touch layer 1. Feed. For example, when the slot antenna is a millimeter wave slot antenna, the millimeter wave radio frequency signal can enter the strip feeder 93 through the RFIC circuit. Since the strip feeder 93 is a fully enclosed feed structure, electromagnetic waves on it will not leak into the space, thereby avoiding electromagnetic interference to other components in the electronic equipment. Near the antenna feed point 951, the strip feeder 93 is transformed to the upper coplanar waveguide through a metal via to achieve a good common ground between the reference ground of the feeder and the antenna ground on the touch layer.

It should be noted that the above-mentioned feeding form of the second feeder structure 9 is only an optional embodiment of the present application. In addition to this, it is also possible to adopt coaxial feeding, microstrip line feeding and other forms of LCP feeder structure. The embodiments of the present application are not limited to this.

Optionally, impedance control can also be performed on the LCP feeder structure, and the line length should be as short as possible to reduce path loss. The feeder lines of each slot antenna unit are converged to the bonding area, which is directly led to the touch hot pressing position, and after hot pressing, it is transferred to the pins of the RFIC circuit through the traces on the LCP feeder structure. Wherein, the link area can be provided with a positioning mark to facilitate LCP hot pressing positioning.

Since the LCP material has properties such as low high-frequency loss, good stability, and easy bending, the LCP material is used as the connection line between the microstrip feeder of the on-screen loop slot antenna and the antenna signal source in the embodiment of the present application, so that it can be as far as possible Reduce unnecessary line loss caused by feeding.

Optionally, at least one of the display chip 100 and the touch chip 101 of the touch screen can be disposed on the first circuit board together with the RFIC, that is, at least one of the display chip 100 and the touch chip 101 of the touch screen It can be set on the same circuit board as the RFIC, such as the flexible circuit board 10, as shown in FIG. 6.

Optionally, the RFIC can be soldered to the LCP feeder structure, and at least one of the display chip 100 and the touch chip 101 of the touch display screen can also be arranged on the LCP.

In this way, the RFIC can share the connector 102 on the same circuit board with the display chip 100 and the touch chip 101, and there is no need to separately provide the circuit board and the connector, which effectively saves space. Wherein, the connector 102 may be a board-to-board (BTB) connector, which may be used to connect to a motherboard in an electronic device.

The embodiment of the present application takes a single ring-shaped slot antenna formed on the touch layer 1 as an example for description. In practice, the ring-shaped slot antenna in the embodiment of the present application can also be used as a unit for array design. Fig. 7 is a schematic diagram of an S parameter diagram of a slot antenna, Fig. 8 is an efficiency diagram of a slot antenna, and Fig. 9 is a radiation pattern of a single slot antenna. It can be seen from FIGS. 7 and 8 that, taking -6dB as the standard, the impedance bandwidth of the ring-shaped slot antenna formed based on the touch layer designed in the embodiment of this application can cover the 54.5GHz～64GHz frequency band, and the impedance bandwidth is within the impedance bandwidth. The efficiency of the broadband slot antenna based on the touch layer basically meets the requirements.

The embodiment of the present application also provides an electronic device, which includes the above-mentioned touch-sensitive display screen, and can realize the corresponding functions of the above-mentioned touch-control display screen and achieve the same technical effect, which will not be repeated here.

Optionally, when the slot antenna is made of transparent material, the antenna has light permeability and relatively good antenna radiation performance, so it can be applied to smart glasses, virtual reality technology (Virtual Reality, VR) equipment, and augmented reality. (Augmented Reality, AR) devices and other smart wearable devices can also be used on the glass or display screens of mobile terminal devices such as the Internet of Things, smart homes, automobiles, mobile phones, etc., not only has the characteristics of conformal and concealment, but also greatly expands the antenna’s capabilities. Design space.

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

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

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. Or there is any such actual relationship or sequence between operations. Moreover, the terms "including", "including" 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 not only includes those elements, but also includes those elements that are not explicitly listed. Other elements listed, or also include elements inherent to this process, method, article, or terminal device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other same elements in the process, method, article, or terminal device that includes the element.

The above are the preferred embodiments of this application. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications are also included in this application. Within the scope of protection applied for.

Claims

A touch display screen, including:

Display layer

A touch control layer, the touch control layer is provided with at least one annular opening;

At least one first feeder structure and a dielectric layer, the first feeder structure and the dielectric layer are located between the display layer and the touch layer, and the dielectric layer is located between the first feeder structure and the Between the touch layers; wherein the orthographic projection area of the first feed line structure on the touch layer straddles the inner ring and the outer ring of the annular opening.
The touch display screen of claim 1, further comprising:

The first adhesive layer, the display layer is connected to the touch layer through the first adhesive layer, and the first adhesive layer extends between the touch layer and the first feed line structure The part is formed as the dielectric layer.
The touch display screen of claim 1, wherein the annular opening is symmetrical with respect to the first axis; the at least one first feeder structure comprises:

A first sub-feeder structure, the orthographic projection area of the first sub-feeder structure on the touch layer straddles the inner ring and the outer ring at the first position of the annular opening;

A second sub-feeder structure, the orthographic projection area of the second sub-feeder structure on the touch layer straddles the inner ring and the outer ring at the second position of the annular opening;

Wherein, the first position and the second position are symmetrical with respect to the first axis.
The touch display screen according to claim 3, wherein the annular opening is also symmetrical with respect to a second axis, and the second axis is perpendicular to the first axis; the at least one first feeder structure is further include:

A third sub-feeder structure, the orthographic projection area of the third sub-feeder structure on the touch layer straddles the inner ring and the outer ring at the third position of the annular opening;

A fourth sub-feeder structure, the orthographic projection area of the fourth sub-feeder structure on the touch layer straddles the inner ring and the outer ring at the fourth position of the annular opening;

Wherein, the third position and the fourth position are symmetrical with respect to the second axis.
The touch display screen of claim 1, wherein the first feeder structure comprises: an impedance transformation structure and a microstrip feeder; the first end of the microstrip feeder is connected to the impedance transformation structure, and the microstrip feeder The second end with the feeder is connected to the feed;

Wherein, at one end of the first feeder structure where the impedance transformation structure is located, the orthographic projection area on the touch layer is arranged across the inner ring and the outer ring of the annular opening.
The touch display screen according to any one of claims 1 to 5, further comprising:

A second feeder structure, the first end of the second feeder structure is connected to the first feeder structure, and the second end of the second feeder structure is connected to a feed source.
The touch display screen of claim 6, wherein the second feeder structure comprises:

A metal ground layer and a first substrate, the metal ground layer being disposed on the first surface of the first substrate;

A ribbon feeder and a second substrate, the ribbon feeder is arranged between the second surface of the first substrate and the first surface of the second substrate; the second substrate is provided with a through hole;

A coplanar waveguide, the coplanar waveguide is disposed on the second surface of the second substrate, and the first end of the coplanar waveguide is connected to the first end of the strip feeder through the through hole, the The second end of the coplanar waveguide is connected to the first feeder structure, and the second end of the strip feeder is connected to the feed source.
The touch display screen of claim 1, wherein the annular opening is located in a non-sensitive area of the touch layer;

The non-sensitive area is an area corresponding to the black border area of the touch display screen, or an area corresponding to the status bar display area of the touch display screen.
The touch display screen according to claim 1, wherein when the number of the annular openings is greater than one, the slot antennas corresponding to the annular openings are arranged according to a predetermined rule to form an antenna array.
An electronic device comprising the touch display screen according to any one of claims 1-9.