Position detection sensor and touch display device
By adopting a combination of cross-coupled mesh intermediate antenna and edge antenna in the handwriting screen, the problem of insufficient capacitance detection accuracy in the prior art is solved, and high-precision electromagnetic touch and capacitive touch functions are realized, while reducing the width of the equipment frame.
Patent Information
- Application Number
- CN202421561833.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The antenna coils of existing capacitive electromagnetic handwriting screens have high requirements for capacitance detection accuracy, which is difficult to meet the high-precision requirements.
A first and second antenna groups are adopted that are cross-coupled, wherein the intermediate antenna is a mesh antenna and the edge antenna width is smaller than the intermediate antenna. The two are cross-coupled to realize electromagnetic touch and capacitive touch functions.
The capacitance detection accuracy is improved, and the electromagnetic touch and capacitive touch functions are realized, while reducing the frame width of the touch device.
Smart Images
Figure CN222718879U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of handwriting devices, and in particular to a position detection sensor and a touch display device. Background Art
[0002] A handwriting screen is a product that changes the way computers are used and revolutionizes the office environment. It can completely change the traditional way of using a computer with a monitor, a mouse, and a keyboard.
[0003] The prior art capacitive electromagnetic handwriting screen has both electromagnetic touch and capacitive touch functions. The prior art provides a capacitive electromagnetic handwriting screen that senses capacitive signals and electromagnetic signals by multiplexing antennas. Figure 1 and Figure 2 ,in, Figure 1 A schematic diagram of the component connection relationship of a capacitive electromagnetic handwriting screen provided by the prior art, Figure 2 for Figure 1 The schematic diagram of the arrangement of the antenna of the capacitive electromagnetic handwriting screen is shown, the capacitive electromagnetic handwriting screen 90 includes an antenna board 91, an electromagnetic handwriting control module 92 and a capacitive handwriting control module 93, the antenna board 91 includes a plurality of X-direction coils 911 and a plurality of Y-direction coils 913, one end of the X-direction coil 911 is connected to the electromagnetic handwriting control module 92, and the other end is connected to the capacitive handwriting control module 93, one end of the Y-direction coil 913 is connected to the electromagnetic handwriting control module 92, and the other end is connected to the capacitive handwriting control module 93. The X-direction coil 911 and the Y-direction coil 913 are annular coils that can detect electromagnetic signals, and the X-direction coil 911 and the Y-direction coil 913 are cross-coupled and can detect capacitive signals.
[0004] However, the X-direction coil 11 and the Y-direction coil 13 in the prior art are multi-turn ring antennas wound with wires. The coupling capacitance formed by the X-direction coil 11 and the Y-direction coil 13 is small, and high detection accuracy is required. Utility Model Content
[0005] In order to solve the technical problem that the antenna coil of the existing capacitive electromagnetic handwriting screen has high requirements on the capacitance detection accuracy, the utility model provides a position detection sensor and a touch display device.
[0006] According to a first aspect of an embodiment of the utility model, a position detection sensor is provided, including a substrate, a first antenna group and a second antenna group. The first antenna group is arranged on the substrate, including a plurality of first antennas arranged along a first direction, the first antenna including a first end and a second end opposite to each other, the second antenna group is arranged on the substrate, including a plurality of second antennas arranged along a second direction, the second antenna including a third end and a fourth end opposite to each other, the second direction is different from the first direction, and the second antenna is insulated from the first antenna; along the first direction, the plurality of first antennas include a plurality of middle antennas and an edge antenna located on at least one side of the middle antenna, the middle antenna is a mesh antenna, and the width of the edge antenna is smaller than the width of the middle antenna.
[0007] In some embodiments, the substrate is a transparent substrate, and the first antenna group and the second antenna group are disposed on different layers on the same side of the transparent substrate, or are disposed on two opposite sides of the transparent substrate, or are disposed on two transparent substrates.
[0008] In some embodiments, there are two edge antennas, which are arranged on both sides of the middle antenna along the first direction.
[0009] In some embodiments, the edge antenna is a mesh antenna having a mesh density greater than that of the middle antenna, or the edge antenna is an antenna formed of a single strip of conductive material.
[0010] In some embodiments, the impedance of the single middle antenna is equal to the impedance of the single edge antenna.
[0011] In some embodiments, the first antenna group further includes a first lead wire and a second lead wire, the first lead wire is multiple in number and electrically connected to the first end in one-to-one correspondence, the second lead wire is multiple in number and electrically connected to the second end in one-to-one correspondence, the second antenna group further includes a third lead wire and a fourth lead wire, the third lead wire is multiple in number and electrically connected to the third end in one-to-one correspondence, the fourth lead wire is multiple in number and electrically connected to the fourth end in one-to-one correspondence;
[0012] The position detection sensor also includes a first lead-out terminal and a second lead-out terminal. Along the first direction, the first lead-out terminal and the second lead-out terminal are arranged on opposite sides of the first antenna group. There are multiple first lead-out terminals, and the first lead wire and the third lead wire are electrically connected to the first lead terminal in a one-to-one correspondence. There are multiple second lead-out terminals, and the second lead wire and the fourth lead wire are electrically connected to the second lead terminal in a one-to-one correspondence.
[0013] In some embodiments, the first antenna group further includes a first lead wire and a second lead wire, the first lead wire is multiple in number and electrically connected to the first end in a one-to-one correspondence, and the second lead wire is multiple in number and electrically connected to the second end in a one-to-one correspondence;
[0014] The position detection sensor further includes a first lead terminal and a second lead terminal, and a conductive pattern formed by the first lead terminal and the second lead terminal on a plane is centrally symmetrical.
[0015] In some embodiments, in a direction perpendicular to the first direction, the length of at least one of the edge antennas is shorter than the length of the middle antenna, and a yield zone is formed on the end side of the edge antenna where the length of the edge antenna becomes shorter relative to the middle antenna;
[0016] The first antenna group further includes a first lead wire and a second lead wire, wherein the first lead wire is in plurality and electrically connected to the first end in a one-to-one correspondence, and the second lead wire is in plurality and electrically connected to the second end in a one-to-one correspondence;
[0017] The position detection sensor further includes a first lead terminal, and the first lead wire extends through the clearance area to be electrically connected to the first lead terminal.
[0018] According to a second aspect of an embodiment of the utility model, there is provided a touch display device, comprising a shell and a transparent display panel arranged in the shell, a position detection sensor and a display module, wherein the position detection sensor is arranged between the transparent display panel and the display module, and the position detection sensor comprises a substrate, a first antenna group and a second antenna group, wherein the first antenna group is arranged on the substrate and comprises a plurality of first antennas arranged along a first direction, wherein the first antenna comprises a first end and a second end opposite to each other, wherein the second antenna group is arranged on the substrate and comprises a plurality of second antennas arranged along a second direction, wherein the second antenna comprises a third end and a fourth end opposite to each other, wherein the second direction is different from the first direction, and wherein the second antenna is insulated from the first antenna; along the first direction, the plurality of first antennas comprise a plurality of middle antennas and an edge antenna located on at least one side of the middle antenna, wherein the middle antenna is a mesh antenna, and the width of the edge antenna is smaller than the width of the middle antenna.
[0019] In some embodiments, in a plane perpendicular to the display direction of the touch display device, the middle antenna is at least partially disposed within a display area of the display module, and the edge antenna is disposed outside the display area of the display module.
[0020] In some embodiments, in a plane perpendicular to the display direction of the touch display device, the grid lines of the middle antenna are arranged between the pixels of the display module.
[0021] Compared with the prior art, the first antenna and the second antenna of the position detection sensor provided by the utility model are cross-coupled, and the two ends of the first antenna and the second antenna can be used to connect the electromagnetic control module and the capacitive control module respectively, so as to realize the electromagnetic touch function and the capacitive touch function at the same time; the middle antenna is a mesh antenna, which can increase the coupling capacitance and reduce the capacitance detection accuracy requirement; the edge antenna is located on at least one side of the middle antenna, and its width is smaller than that of the middle antenna. When applied to a touch device, the width of the border of the touch device can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0023] Figure 1 A schematic diagram of the component connection relationship of a capacitive electromagnetic handwriting screen provided by the prior art;
[0024] Figure 2 for Figure 1 The schematic diagram of the arrangement of the antenna of the capacitive electromagnetic handwriting screen is shown;
[0025] Figure 3 A schematic diagram of the structure of the position detection sensor provided by the utility model;
[0026] Figure 4 for Figure 3 A schematic structural diagram of the first antenna group shown;
[0027] Figure 5 for Figure 3 A schematic diagram of the structure of the second antenna group shown;
[0028] Figures 6A-6D for Figure 4 A schematic structural diagram of other configuration methods of the first antenna group is shown. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.
[0030] In the present invention, "at least one" means one or more, and "more" means two or more. The terms "first" and "second" are used only for descriptive purposes to distinguish objects such as substances from each other, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
[0031] See also Figure 3 , is a schematic diagram of the structure of the position detection sensor provided by the utility model. The embodiment of the utility model provides a touch display device, including a housing, a transparent panel of a display screen, a position detection sensor 10, a display module, an electromagnetic control module, a capacitive control module and a stylus. The transparent panel of the display screen, the position detection sensor 10, the display module, the electromagnetic control module and the capacitive control module are accommodated in the housing, and the position detection sensor 10 is used to detect the writing signal of the stylus. The position detection sensor 10 is electrically connected to the electromagnetic control module and the capacitive control module.
[0032] The position detection sensor 10 includes a substrate 11, a first antenna group 13 and a second antenna group 15. The first antenna group 13 and the second antenna group 15 are arranged on the substrate 11. Specifically, the first antenna group 13 and the second antenna group 15 can be arranged on different layers on the same side of the substrate 11, can be arranged on opposite sides of the substrate 11, or can be arranged on two substrates 11.
[0033] In this embodiment, the substrate 11 is a transparent substrate. The substrate 11 is made of a dielectric material, and may be a transparent film or transparent glass. Specifically, it may be a polyethylene terephthalate film (PET film).
[0034] See also Figure 4 , which is a schematic diagram of the structure of the first antenna group of the position detection sensor provided by the utility model. The first antenna group 13 includes a plurality of first antennas 131 arranged along a first direction, in a strip shape. The first antenna 131 includes a first end 1311 and a second end 1313 opposite to each other, the first end 1311 being used to connect to the electromagnetic control module, and the second end 1313 being used to connect to the capacitive control module. Along the first direction, the plurality of first antennas 131 include a plurality of first middle antennas 131c and an edge antenna 131a located on at least one side of the first middle antenna 131c, the first middle antenna 131c being a mesh antenna, and the width of the first edge antenna 131a being smaller than the width of the first middle antenna 131c.
[0035] Among them, the first middle antenna 131c can be composed of conductive thin wires to form a mesh; the first edge antenna 131a can be a mesh antenna composed of conductive thin wires, and the mesh density is greater than the mesh density of the first middle antenna 131c; the first edge antenna 131a can also be an antenna composed of a single conductive material, and in the first direction, the first edge antenna 131a has a first preset width, specifically, it can be composed of a conductive material extending in a direction perpendicular to the first direction without forming a mesh.
[0036] It can be understood that the number of the first edge antennas 131a can be one or more; the multiple first edge antennas 131a can be arranged on the same side edge of the first middle antenna 131c, or can be arranged on both side edges of the first middle antenna 131c. Furthermore, the number of the first edge antennas 131a arranged on both side edges of the first middle antenna 131c can be equal or unequal.
[0037] In some embodiments, the impedance of the single first middle antenna is equal to the impedance of the single first edge antenna.
[0038] In this embodiment, along the first direction, there are two first edge antennas 131a, which are arranged on both sides of the first middle antenna 131c along the first direction.
[0039] See also Figure 5 , is a schematic diagram of the structure of the second antenna group of the position detection sensor provided by the utility model. The second antenna group 15 includes a plurality of second antennas 151 arranged along the second direction, in a strip shape, and the second antenna 151 and the first antenna 131 are insulated from each other and cross-coupled. The second antenna 151 includes a third end 1511 and a fourth end 1513 opposite to each other, the third end 1511 is used to connect the electromagnetic control module, and the fourth end 1513 is used to connect the capacitive control module. Along the second direction, the plurality of second antennas 151 include a plurality of second middle antennas 151c and an edge antenna 151c located on at least one side of the second middle antenna 151c, the second middle antenna 151c is a mesh antenna, and the width of the second edge antenna 151a is less than the width of the second middle antenna 151c.
[0040] Among them, the second middle antenna 151c can be composed of conductive thin wires to form a mesh; the second edge antenna 151a can be a mesh antenna composed of conductive thin wires, and the mesh density is greater than the mesh density of the second middle antenna 151c; the second edge antenna 151a can also be an antenna composed of a single conductive material, and in the first direction, the second edge antenna 151a has a second preset width, specifically, it can be composed of a conductive material extending in a direction perpendicular to the second direction without forming a mesh.
[0041] It can be understood that the number of the second edge antenna 151a can be one or more; the multiple second edge antennas 151a can be arranged on the same side edge of the second middle antenna 151c, or can be arranged on both side edges of the second middle antenna 151c. Furthermore, the number of the second edge antennas 151a arranged on both side edges of the second middle antenna 151c can be equal or unequal.
[0042] In some embodiments, the impedance of the single second middle antenna is equal to the impedance of the single second edge antenna.
[0043] In this embodiment, along the second direction, there are two second edge antennas 151a, which are arranged on both sides of the second middle antenna 151c along the second direction.
[0044] It should be noted that the mesh antenna can be made of transparent indium tin oxide (ITO) or antimony tin oxide (ATO), and can also be made of metal filaments, such as silver, copper, aluminum and other metals. The width of the metal filaments is smaller than the smallest object visible to the naked eye, generally less than 10μm, and the intermediate antenna can present a transparent effect.
[0045] The intermediate antenna is fixed to the substrate 11 by using processes such as embossing, printing, and etching.
[0046] Embossing process: a mesh pattern of the middle antenna is embossed on the substrate 11 using a metal material.
[0047] Printing process: Printing the mesh pattern of the middle antenna on the substrate 11 using a metal material.
[0048] Etching process: a metal material layer is coated on the substrate 11, and then a mesh pattern of the middle antenna is etched on the metal material layer.
[0049] It should be noted that the mesh shape of the mesh antenna can be square, circular, elliptical, diamond, semicircular, polygonal, irregular, etc., which is not specifically limited here.
[0050] It should also be noted that, in a plane perpendicular to the display direction of the touch display device, the middle antenna is at least partially arranged within the display area of the display module, the edge antenna is arranged outside the display area of the display module, and the grid lines of the middle antenna are arranged between the pixels of the display module.
[0051] In some embodiments, the distance between two adjacent first antennas is 5 mm, and the distance between two adjacent second antennas is 5 mm.
[0052] Please see again Figure 4 The first antenna group 13 further includes a first lead wire 133 and a second lead wire 135. The first lead wire 133 is in plurality and electrically connected to the first end 1311 in one-to-one correspondence. The second lead wire 135 is in plurality and electrically connected to the second end 1313 in one-to-one correspondence. Figure 5 The second antenna group 15 also includes a third lead wire 153 and a fourth lead wire 155. The third lead wire 153 is multiple in number and electrically connected to the third end 1511 in a one-to-one correspondence. The fourth lead wire 155 is multiple in number and electrically connected to the fourth end 1513 in a one-to-one correspondence.
[0053] The position detection sensor 10 further includes a first lead terminal 16 and a second lead terminal 18. Along the first direction, the first lead terminal 16 and the second lead terminal 18 are respectively arranged on opposite sides of the first antenna group 13. There are a plurality of first lead terminals 16, which are arranged in a row along the second direction, and the first lead wire 133 and the third lead wire 153 are respectively electrically connected to the first lead terminal 16 in a one-to-one correspondence. There are a plurality of second lead terminals 18, which are arranged in a row along the second direction, and the second lead wire 135 and the fourth lead wire 155 are respectively electrically connected to the second lead terminal 18 in a one-to-one correspondence.
[0054] It can be understood that the lead wires are arranged outside the distribution range of the first antenna 131 and the second antenna 151. The first lead wires 133 and the third lead wires 153 do not intersect, each of the first lead wires 133 does not intersect each other, and each of the third lead wires 153 does not intersect each other; the second lead wires 135 and the fourth lead wires 155 do not intersect, each of the second lead wires 135 does not intersect each other, and each of the fourth lead wires 155 does not intersect each other.
[0055] In some embodiments, the conductive pattern formed by the first lead wire and the second lead wire on a plane is centrally symmetrical. The conductive pattern formed by the third lead wire and the fourth lead wire on a plane is centrally stacked. The conductive pattern formed by the first antenna, the second antenna, the first lead wire, the second lead wire, the third lead wire, the fourth lead wire, the first lead terminal, and the second lead terminal on the substrate is centrally symmetrical.
[0056] In this embodiment, the length of each of the first antennas 131 is equal, and the length of each of the second antennas 151 is equal.
[0057] For some examples, see Figures 6A-6D ,for Figure 4 A schematic diagram of the structure of other configurations of the first antenna group is shown. In a direction perpendicular to the first direction, the length of at least one first edge antenna 231a is less than the length of the first middle antenna 231c, and a clearance area X is formed at the end side of the first edge antenna 231a relative to the end side of the first middle antenna 231c where the length is shortened. The clearance area X is used to arrange the lead wires so that the space occupied by the lead wires is reduced, thereby narrowing the non-sensing area outside the sensing area formed by the first antenna group 23 and the second antenna group of the touch display device.
[0058] It can be understood that the first edge antenna 231a has two opposite ends, and one of the ends can be configured to be shorter than the first middle antenna 231c to form a clearance area X, such as Fig. 6A As shown, the first lead wire 233 extends through one of the make way areas X to be electrically connected to the first lead terminal 26, and the second lead wire 235 extends through another of the make way areas X to be electrically connected to the second lead terminal 28. The first edge antenna 231a can also be configured such that both ends are shorter than the first middle antenna 231c to form two make way areas X, such as Figure 6B shown.
[0059] It can also be understood that the number of the first edge antennas 231a can be one or more. When the number of the first edge antennas 231a is multiple, only one of the first edge antennas 231a can be set to have a length smaller than the length of the first middle antenna 231c to form the clearance area X, such as Figure 6C It is also possible to set the length of multiple or all of the first edge antennas 231a to be less than the length of the first intermediate antenna 231c to form the clearance area X, such as Fig.6DOf course, among the multiple shortened first edge antennas 231a, all or part of them can be set to have one end shortened to form the clearance area X, or all or part of them can be set to have both ends shortened to form the clearance area X.
[0060] In some embodiments, the first direction is a width direction of the touch display device, and the second direction is a length direction of the touch display device.
[0061] In some embodiments, the first direction is a length direction of the touch display device, and the second direction is a width direction of the touch display device.
[0062] In some embodiments, the first direction is perpendicular to the second direction.
[0063] The position detection sensor 10 realizes the electromagnetic touch function and the capacitive touch function through the first antenna group 13 and the second antenna group 15. The specific principle is as follows:
[0064] Electromagnetic touch function:
[0065] The two first antennas 131 are selectively connected, and the two first antennas 131 can form a ring coil, which senses the electromagnetic signal of the stylus pen and transmits it to the electromagnetic control module to confirm the electromagnetic touch position of the stylus pen in the first direction; the two second antennas 151 are selectively connected, and the two second antennas 151 can form a ring coil, which senses the electromagnetic signal of the stylus pen and transmits it to the electromagnetic control module to confirm the electromagnetic touch position of the stylus pen in the second direction, thereby realizing the electromagnetic touch function.
[0066] It is understandable that multiple pairs of the first antennas 131 can be connected simultaneously to form multiple loop coils arranged along the first direction to sense the electromagnetic signal of the stylus to improve scanning efficiency. Similarly, multiple pairs of the second antennas 151 can be connected simultaneously to form multiple loop coils arranged along the second direction.
[0067] It can also be understood that the electromagnetic touch module can control the first end 1311 and the third end 1511 through an analog switch, and the capacitive touch module can control the second end 1313 and the fourth end 1513 through an analog switch to form a ring coil.
[0068] Capacitive touch function:
[0069] The cross-coupling point between the first antenna 131 and the second antenna 151 is a capacitor node. The electromagnetic touch module controls the first end 1311 and the third end 1511 to be disconnected through an analog switch to form a high resistance. The capacitor control module controls the selection of the second end 1313 and the fourth end 1513 through an analog switch to detect the capacitance change at the capacitor node, thereby confirming the capacitive touch position and realizing the capacitive touch function.
[0070] Compared with the prior art, the first antenna 131 and the second antenna 151 of the position detection sensor 10 provided by the utility model adopt strip antennas, the first antenna 131 and the second antenna 151 are cross-coupled, and the two ends of the first antenna 131 and the second antenna 151 are respectively used to connect the electromagnetic control module and the capacitive control module, and can realize the electromagnetic touch function and the capacitive touch function at the same time; the first middle antenna 131c and the second middle antenna 151c are mesh antennas, which can increase the coupling capacitance and reduce the capacitance detection accuracy requirements. They have good transparency and can be directly set in the visible area of the touch display device without blocking the display screen; the edge antenna is located on at least one side of the middle antenna, and is set to a mesh antenna with a mesh density less than the mesh density of the middle antenna, or an antenna composed of a single conductive material, which can enhance the signal strength of the edge area detected by the touch display device, and at the same time reduce the width of the border of the touch display device.
[0071] In addition, the position detection sensor 10 provided by the utility model can avoid the problem of using gain to make the signal difference between the single middle antenna and the single edge antenna at the same voltage too large by setting the impedance of the middle antenna and the edge antenna to be equal.
[0072] The above descriptions are only some embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A position detection sensor, characterized in that: include: Base material; A first antenna group, disposed on the substrate, includes a plurality of first antennas arranged along a first direction, wherein the first antennas include a first end and a second end opposite to each other; A second antenna group, disposed on the substrate, includes a plurality of second antennas arranged along a second direction, the second antennas include a third end and a fourth end opposite to each other, the second direction is different from the first direction, and the second antennas are insulated from the first antennas; Along the first direction, the plurality of first antennas include a plurality of middle antennas and edge antennas located on at least one side of the middle antennas. The middle antennas are mesh antennas, and the width of the edge antennas is smaller than that of the middle antennas.
2. The position detection sensor according to claim 1, characterized in that: The substrate is a transparent substrate, and the first antenna group and the second antenna group are arranged on different layers on the same side of the substrate, or are arranged on two opposite sides of the substrate, or are arranged on two substrates.
3. The position detection sensor according to claim 1, characterized in that: There are two edge antennas, which are arranged on both sides of the middle antenna along the first direction.
4. The position detection sensor according to claim 1, characterized in that: The edge antenna is a mesh antenna with a mesh density greater than that of the middle antenna, or the edge antenna is an antenna composed of a single strip of conductive material.
5. The position detection sensor according to claim 4, characterized in that: The impedance of the single middle antenna is equal to the impedance of the single edge antenna.
6. The position detection sensor according to claim 1, characterized in that: The first antenna group further includes a first lead wire and a second lead wire, the first lead wire is in plurality and electrically connected to the first end in one-to-one correspondence, the second lead wire is in plurality and electrically connected to the second end in one-to-one correspondence, the second antenna group further includes a third lead wire and a fourth lead wire, the third lead wire is in plurality and electrically connected to the third end in one-to-one correspondence, the fourth lead wire is in plurality and electrically connected to the fourth end in one-to-one correspondence; The position detection sensor also includes a first lead-out terminal and a second lead-out terminal. Along the first direction, the first lead-out terminal and the second lead-out terminal are arranged on opposite sides of the first antenna group. There are multiple first lead-out terminals, and the first lead wire and the third lead wire are electrically connected to the first lead terminal in a one-to-one correspondence. There are multiple second lead-out terminals, and the second lead wire and the fourth lead wire are electrically connected to the second lead terminal in a one-to-one correspondence.
7. The position detection sensor according to claim 1, characterized in that: The first antenna group further includes a first lead wire and a second lead wire, wherein the first lead wire is in plurality and electrically connected to the first end in a one-to-one correspondence, and the second lead wire is in plurality and electrically connected to the second end in a one-to-one correspondence; The position detection sensor further includes a first lead terminal and a second lead terminal, and a conductive pattern formed by the first lead terminal and the second lead terminal on a plane is centrally symmetrical.
8. The position detection sensor according to claim 1, characterized in that: In a direction perpendicular to the first direction, the length of at least one of the edge antennas is shorter than the length of the middle antenna, and a clearance area is formed on the end side of the edge antenna where the length of the edge antenna becomes shorter than that of the middle antenna; The first antenna group further includes a first lead wire and a second lead wire, wherein the first lead wire is in plurality and electrically connected to the first end in a one-to-one correspondence, and the second lead wire is in plurality and electrically connected to the second end in a one-to-one correspondence; The position detection sensor further includes a first lead terminal, and the first lead wire extends through the clearance area to be electrically connected to the first lead terminal.
9. A touch display device, comprising a housing, a transparent display panel, a position detection sensor and a display module arranged in the housing, wherein the position detection sensor is arranged between the transparent display panel and the display module, characterized in that: The position detection sensor is a position detection sensor as claimed in any one of claims 1-8.
10. The touch display device according to claim 9, characterized in that: In a plane perpendicular to the display direction of the touch display device, the middle antenna is at least partially disposed within a display area of the display module, and the edge antenna is disposed outside the display area of the display module.
11. The touch display device according to claim 9, characterized in that: In a plane perpendicular to the display direction of the touch display device, the grid lines of the middle antenna are arranged between the pixels of the display module.