Method for preparing touch module, touch module and touch display device

Abstract

The present disclosure provides a method for preparing a touch module, a touch module and a touch display device, wherein the touch module includes a first touch layer, a first insulating layer and a second touch layer; the first touch layer includes a plurality of first electrodes and a first electromagnetic coil, the first electrodes are arranged in an array along a first direction and a second direction, the first electromagnetic coil extends along the first direction and is arranged in an array along the second direction, the second touch layer includes a second electrode and a second electromagnetic coil, the second electrodes are arranged in an array along the first direction and the second direction, the second electromagnetic coil extends along the second direction and is arranged in an array along the first direction; the first electrode includes a plurality of first sub-electrodes, the first sub-electrodes in a first area of ​​the first electrode are connected to the first electromagnetic coil, and each first sub-electrode outside the first area is connected; the second electrode includes a plurality of second sub-electrodes, the second sub-electrodes in a second area of ​​the second electrode are connected to the second electromagnetic coil, and each second sub-electrode outside the second area is connected.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more specifically, to a method for preparing a touch module, a touch module, and a touch display device. Background Art

[0002] With the rapid development of touch technology, styluses, as an important tool for interacting with touch screens, are increasingly attracting users' attention due to their diverse performance and functions. Traditionally, styluses are divided into two main categories: active styluses and passive styluses.

[0003] Passive styluses, with their low price and battery-free operation, have gained a foothold in the entry-level market. However, they struggle to achieve precise touch recognition, directly impacting user writing accuracy and interactive experience. Summary of the Invention

[0004] The present disclosure aims to provide a method for preparing a touch module, a touch module, and a touch device, so as to improve the technical problems of low touch recognition accuracy and poor user experience of passive styluses in related technologies.

[0005] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0006] A first aspect of the present disclosure provides a touch module, comprising a first touch layer, a first insulating layer, and a second touch layer stacked in sequence;

[0007] The first touch layer includes a plurality of first electrodes and a plurality of first electromagnetic coils, the plurality of first electrodes are arranged in an array along a first direction and a second direction, the plurality of first electromagnetic coils extend along the first direction and are arranged in an array along the second direction, and the second touch layer includes a plurality of second electrodes and a plurality of second electromagnetic coils, the plurality of second electrodes are arranged in an array along the first direction and the second direction, the plurality of second electromagnetic coils extend along the second direction and are arranged in an array along the first direction;

[0008] The first electrode includes a plurality of first sub-electrodes arranged in an array, wherein the first sub-electrodes in a first region of the first electrode are connected to the first electromagnetic coil, and the first sub-electrodes outside the first region of the first electrode are connected to each other. The second electrode includes a plurality of second sub-electrodes arranged in an array, wherein the second sub-electrodes in a second region of the second electrode are connected to the second electromagnetic coil, and the second sub-electrodes outside the second region of the second electrode are connected to each other. The orthographic projections of the first region and the second region on the first insulating layer do not overlap, and the orthographic projections of the first sub-electrodes outside the first region of the first electrode on the first insulating layer at least partially overlap with the orthographic projections of the second sub-electrodes outside the second region of the second electrode on the first insulating layer.

[0009] The first sub-electrode outside the first area of ​​the first electrode and the second sub-electrode outside the second area of ​​the second electrode form a capacitive sensing structure, the first sub-electrode within the first area of ​​the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode within the second area of ​​the second electrode and the second electromagnetic coil form a second electromagnetic induction structure.

[0010] Optionally, the first electrode includes N1*M1 first sub-electrodes arranged in an array along the first direction and the second direction, and the second electrode includes N2*M2 second sub-electrodes arranged in an array along the first direction and the second direction, wherein N1 and N2 are natural numbers greater than or equal to 3, M1 and M2 are natural numbers greater than or equal to 3, the first region includes at least one of the first sub-electrodes, and the second region includes at least one of the second sub-electrodes.

[0011] Optionally, the projection area of ​​the orthographic projection of the first region on the first insulating layer is the same as the projection area of ​​the orthographic projection of the second region on the first insulating layer, and the sum of the areas of the orthographic projection of the first region on the first insulating layer, the orthographic projection of the second region on the first insulating layer, and the projection overlapping area is the area of ​​the orthographic projection of the first electrode or the second electrode on the first insulating layer, and the projection overlapping area is the overlapping area of ​​the orthographic projection of each first sub-electrode outside the first region in the first electrode on the first insulating layer and the orthographic projection of each second sub-electrode outside the second region in the second electrode on the first insulating layer.

[0012] Optionally, the values ​​of N and M are both 4; in the first electrode, the first sub-electrode that is the jth in the first direction and the ith in the second direction is represented by A ij In the second electrode, the second sub-electrode which is the jth in the first direction and the ith in the second direction is represented by B ij ;

[0013] The first region includes a first sub-region and a second sub-region. The first sub-region includes a first sub-electrode A 11 、A 12 、A 13 and A 22 The second sub-region includes a first sub-electrode A 33 、A 42 、A 43 and A 44 , the first sub-electrode in the first sub-region is connected to the adjacent first coil structure, and the first sub-electrode in the second sub-region is connected to the adjacent second coil structure;

[0014] The second region includes a third sub-region and a fourth sub-region, and the third sub-region includes a second sub-electrode B 21 、B 31 、B 41 and B 32 The fourth sub-region includes the second sub-electrode B 14 、B 24 、B 34 and B 23 The second sub-electrode in the third sub-region is connected to the adjacent second coil structure, and the second sub-electrode in the fourth sub-region is connected to the adjacent second coil structure.

[0015] Optionally, the projection area of ​​the orthographic projection of the first region on the first insulating layer is the same as the projection area of ​​the orthographic projection of the second region on the first insulating layer, and the sum of the area of ​​the orthographic projection of the first region on the first insulating layer and the projection overlapping area is less than the area of ​​the orthographic projection of the area outside the first region in the first electrode on the first insulating layer, and the projection overlapping area is the overlapping area of ​​the orthographic projection of each first sub-electrode outside the first region in the first electrode on the first insulating layer and the orthographic projection of each second sub-electrode outside the second region in the second electrode on the first insulating layer.

[0016] Optionally, the values ​​of N and M are both 4; in the first electrode, the first sub-electrode that is the jth in the first direction and the ith in the second direction is represented by A ij In the second electrode, the second sub-electrode which is the jth in the first direction and the ith in the second direction is represented by B ij ;

[0017] The first region includes a first sub-region and a second sub-region. The first sub-region includes a first sub-electrode A 12 and A 22 The second sub-region includes a first sub-electrode A 33 and A 43 , the first sub-electrode in the first sub-region is connected to the adjacent first coil structure, and the first sub-electrode in the second sub-region is connected to the adjacent second coil structure;

[0018] The second region includes a third sub-region and a fourth sub-region, and the third sub-region includes a second sub-electrode B 31 and B 32 The fourth sub-region includes the second sub-electrode B 23 and B 24 The second sub-electrode in the third sub-region is connected to the adjacent second coil structure, and the second sub-electrode in the fourth sub-region is connected to the adjacent second coil structure.

[0019] Optionally, in the second direction, the plurality of first electromagnetic coils form at least one first electromagnetic coil group, the first electromagnetic coil group includes at least two adjacent first electromagnetic coils, and the at least two adjacent first electromagnetic coils partially overlap to form a first overlapping area;

[0020] In the first direction, the plurality of second electromagnetic coils form at least one second electromagnetic coil group, the second electromagnetic coil group includes at least two adjacent second electromagnetic coils, and the at least two adjacent second electromagnetic coils partially overlap to form a second overlapping area.

[0021] Optionally, the first insulating layer is provided with a first via hole in the first overlapping area, the second touch layer further includes a second connecting coil provided in the first overlapping area, and the partially overlapping first electromagnetic coils realize interlayer jumper through the first via hole and the first connecting coil;

[0022] The first insulating layer is provided with a second via hole in the second overlapping area. The first touch layer further includes a first connecting coil provided in the second overlapping area. The partially overlapping second electromagnetic coil realizes interlayer jumper through the second via hole and the first connecting coil.

[0023] Optionally, the first electromagnetic coil includes two first conductors that are parallel to each other and extend along a first direction, the two first conductors are connected to form a U-shaped structure, the opening directions of the first electromagnetic coils in the first electromagnetic coil group are the same, and the opening directions of the first electromagnetic coils in adjacent first electromagnetic coil groups are different;

[0024] The second electromagnetic coil includes two second conductors parallel to each other and extending along the second direction. The two second conductors are connected to form a U-shaped structure. The opening directions of the second electromagnetic coils in the second electromagnetic coil group are the same, and the opening directions of the second electromagnetic coils in adjacent second electromagnetic coil groups are different.

[0025] Optionally, the touch module also includes: a touch detection circuit, which is connected to the capacitive sensing structure, the first electromagnetic induction structure and the second electromagnetic induction structure, and is used to drive the capacitive sensing structure, the first electromagnetic induction structure and the second electromagnetic induction structure in sequence according to a preset order to perform touch detection.

[0026] A second aspect of the present disclosure provides a method for preparing a touch module, comprising the following steps:

[0027] Prepare a first touch layer, the first touch layer comprising a plurality of first electrodes and a plurality of first electromagnetic coils, the plurality of first electrodes being arranged in an array along a first direction and a second direction, the plurality of first electromagnetic coils extending along the first direction and arranged in an array along the second direction, the first electrode comprising a plurality of first sub-electrodes arranged in an array, the first sub-electrodes within a first region of the first electrode being connected to the first electromagnetic coil, and the first sub-electrodes outside the first region of the first electrode being electrically connected;

[0028] preparing a first insulating layer on the first touch layer;

[0029] A second touch layer is prepared on the first insulating layer, the second touch layer comprising a plurality of second electrodes and a plurality of second electromagnetic coils, the plurality of second electrodes being arranged in an array along a first direction and a second direction, the plurality of second electromagnetic coils extending along the second direction and being arranged in an array along the first direction, the second electrode comprising a plurality of second sub-electrodes arranged in an array, the second sub-electrodes in a second region of the second electrode being connected to the second electromagnetic coils, the second sub-electrodes outside the second region of the second electrode being electrically connected, the orthographic projections of the first region and the second region on the first insulating layer not overlapping, and the orthographic projections of the first sub-electrodes outside the first region of the first electrode on the first insulating layer at least partially overlapping with the orthographic projections of the second sub-electrodes outside the second region of the second electrode on the first insulating layer;

[0030] The first sub-electrode outside the first region of the first electrode and the second sub-electrode outside the second region of the second electrode form a capacitive sensing structure, the first sub-electrode within the first region of the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode within the second region of the second electrode and the second electromagnetic coil form a second electromagnetic induction structure.

[0031] A third aspect of the present disclosure provides a touch display device, comprising a display panel and the touch module as described above, wherein the touch module is arranged on the light-emitting side of the display panel.

[0032] The beneficial effects of the present disclosure are as follows:

[0033] The touch module of the disclosed embodiment integrates a first electromagnetic induction structure into a first touch layer in a capacitive sensing structure, and integrates a second electromagnetic induction structure into a second touch layer in the capacitive sensing structure. On the one hand, integrating the EMR coil into the FMLOC touch layer can improve the detection accuracy and sensitivity of the touch module. On the other hand, the sub-electrodes inside each first electrode and each second electrode are designed to be arranged in a grid-like array. The grid-like sub-electrodes can be designed into a modular structure, which is convenient for expansion or adjustment according to actual needs. Part of the FMLOC touch structure can be flexibly connected to the EMR coil to enhance the electromagnetic signal strength, which can further improve the sensitivity and accuracy of the touch, achieve more precise touch detection, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The specific embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0035] Figure 1 A schematic diagram of one structure of a touch module provided in an embodiment of the present disclosure;

[0036] Figure 2 for Figure 1 Schematic diagram of the film structure of the touch module shown;

[0037] Figure 3 for Figure 1 A schematic plan view of the first touch layer;

[0038] Figure 4 for Figure 3 an enlarged view of any first electrode;

[0039] Figure 5 for Figure 3 Enlarged view of middle area C;

[0040] Figure 6 for Figure 1 A schematic plan view of the second touch layer;

[0041] Figure 7 for Figure 6 an enlarged view of any second electrode;

[0042] Figure 8 is a plan view schematically showing another embodiment of the first touch layer;

[0043] Figure 9 for Figure 8 an enlarged view of any first electrode;

[0044] Figure 10 is a plan view schematically showing another embodiment of the second touch layer;

[0045] Figure 11 for Figure 10an enlarged view of any second electrode;

[0046] Figure 12 is a structural diagram of another embodiment of a touch module;

[0047] Figure 13 This is a structural diagram of another embodiment of a touch module;

[0048] Figure 14 is a schematic diagram of a first electrode and a first trace on a first touch layer;

[0049] Figure 15 is a schematic diagram of a second electrode and a second trace on the second touch layer;

[0050] Figure 16 A timing diagram showing the touch detection circuit controlling the capacitive sensing structure, the first electromagnetic induction structure, and the second electromagnetic induction structure to perform touch detection;

[0051] Figure 17 This is a schematic structural diagram of a touch display device according to an embodiment of the present disclosure;

[0052] Figure 18 This is a flow chart of a method for preparing a touch module according to an embodiment of the present disclosure;

[0053] Figure 19 A process flow chart for preparing a touch module on a display panel. DETAILED DESCRIPTION

[0054] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0055] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0056] In the related art, styluses are mainly divided into two categories: active styluses and passive styluses.

[0057] Active styluses, representing the high-end market, offer users a richer and more natural writing and drawing experience thanks to their superior basic performance, including high precision and fast response, as well as additional features such as pen pressure sensing, hover functionality, and integrated buttons. These features not only improve work efficiency but also greatly enhance the possibilities for creative expression. However, active styluses also face significant technical challenges and market bottlenecks. For one thing, their built-in batteries require regular charging, rendering them unusable during charging and impacting the user's continuous use experience. Furthermore, their high cost and reliance on a power source limit their adoption among a wider user base, particularly those who are price-sensitive or seek a lightweight, unfettered experience.

[0058] In contrast, passive styluses, with their low price and battery-free operation, have gained a foothold in the entry-level market. However, their technical limitations cannot be ignored: they struggle to achieve precise touch recognition, which directly impacts user writing accuracy and interactive experience.

[0059] In order to solve the technical problem of low touch recognition accuracy of a passive stylus, the disclosed embodiment provides a dual-touch solution that combines EMR (Electromagnetic Resonance) touch with FMLOC (Flexible Multi Layer on Cell). Among them, FMLOC is based on the working principle of mutual capacitance detection, and generally uses two layers of metal to form the driving electrode and the sensing electrode. The integrated circuit realizes the touch action by detecting the mutual capacitance between the driving electrode and the sensing electrode; EMR touch is based on the principle of electromagnetic induction, and determines the touch position by detecting the change in the magnetic field. Therefore, the process is very sensitive and can capture tiny magnetic field changes, thereby achieving high-precision touch positioning. In specific implementation, the EMR coil is integrated into the FMLOC touch structure without adding additional processes, and the FMLOC touch structure can be partially connected to the EMR coil to improve the signal quality of the EMR touch.

[0060] The following describes the touch module manufacturing method, the touch module, and the touch display device disclosed in the present invention in conjunction with various specific embodiments.

[0061] Please refer to Figures 1 to 7 , Figure 1 A schematic diagram of one structure of a touch module provided in an embodiment of the present disclosure is shown. Figure 2 for Figure 1 The schematic diagram of the membrane structure of the touch module is shown in FIG. Figure 3 for Figure 1 A schematic plan view of the first touch layer in FIG. Figure 4 for Figure 3 An enlarged view of any first electrode in Figure 5 for Figure 3 The enlarged image of the middle area C, Figure 6 for Figure 1 A schematic plan view of the second touch layer in FIG. Figure 7 for Figure 6 An enlarged view of any second electrode in Figures 1 to 7 As shown, the touch module includes a first touch layer 10, a first insulating layer 30 and a second touch layer 20 stacked in sequence. For example, the first touch layer 10 is Figure 1 The second touch layer 20 is shown in the blue line layer. Figure 1 As shown in the red line layer.

[0062] The first touch layer 10 includes a plurality of first electrodes 101 and a plurality of first electromagnetic coils 102 . The plurality of first electrodes 101 are arranged in an array along a first direction and a second direction. The plurality of first electromagnetic coils 102 extend along the first direction and are arranged in an array along the second direction.

[0063] The second touch layer 20 includes a plurality of second electrodes 201 and a plurality of second electromagnetic coils 202 . The plurality of second electrodes 201 are arranged in an array along the first direction and the second direction. The plurality of second electromagnetic coils 202 extend along the second direction and are arranged in an array along the first direction.

[0064] The first electrode 101 includes a plurality of first sub-electrodes 101 a arranged in an array. The first sub-electrodes 101 a in the first region of the first electrode 101 are connected to the first electromagnetic coil 102 , and the first sub-electrodes 101 a outside the first region of the first electrode 101 are connected to each other.

[0065] The second electrode 201 includes a plurality of second sub-electrodes 201a arranged in an array, the second sub-electrodes 201a in the second area of ​​the second electrode 201 are connected to the second electromagnetic coil 202, the second sub-electrodes 201a outside the second area of ​​the second electrode 201 are connected to each other, the orthographic projections of the first area and the second area on the first insulating layer 30 do not overlap, and the orthographic projections of the first sub-electrodes outside the first area of ​​the first electrode 101 on the first insulating layer 30 at least partially overlap with the orthographic projections of the second sub-electrodes outside the second area of ​​the second electrode 201 on the first insulating layer.

[0066] In the above-mentioned touch module, the first sub-electrode 101a outside the first area of ​​the first electrode 101 and the second sub-electrode 201a outside the second area of ​​the second electrode 201 form a capacitive sensing structure, the first sub-electrode 101a in the first area of ​​the first electrode 101 and the first electromagnetic coil 102 form a first electromagnetic induction structure, and the second sub-electrode 201a in the second area of ​​the second electrode 201 and the second electromagnetic coil 202 form a second electromagnetic induction structure.

[0067] Among them, the first area can also be understood as the area formed by the first sub-electrode connected to the first electromagnetic coil 102 in the first electrode 101, and each first sub-electrode outside the first area can also be understood as the area formed by each connected first sub-electrode outside the first area; the second area can be understood as the area formed by the second sub-electrode connected to the second electromagnetic coil 202 in the second electrode 201, and each second sub-electrode outside the second area can also be understood as the area formed by each connected second sub-electrode outside the second area.

[0068] Wherein, the first direction and the second direction intersect. Exemplarily, the first direction and the second direction are arranged perpendicularly, such as Figure 1 As shown, one of the first direction and the second direction is a horizontal direction, and the other is a vertical direction. In the embodiment of the present disclosure, the first direction is the horizontal direction, that is, Figure 1 The second direction is the vertical direction, i.e. Figure 1Take the Y direction as an example to describe, Figure 1 The path indicated by the yellow arrow is used to represent the current path in the second electromagnetic coil 202 .

[0069] In one possible implementation, the first electrode 101 includes N1*M1 first sub-electrodes 101a arranged in an array along the first direction and the second direction, and the second electrode 201 includes N2*M2 second sub-electrodes 201a arranged in an array along the first direction and the second direction, wherein N1 and N2 are natural numbers greater than or equal to 3, M1 and M2 are natural numbers greater than or equal to 3, the first region includes at least one first sub-electrode 101a, and the second region includes at least one second sub-electrode 201a.

[0070] The shapes and areas of the first electrode 101 and the second electrode 201 may be the same or different, and the values ​​of M1 and N1, and the values ​​of M2 and N2 may be the same or different. In the embodiments of the present disclosure, the first electrode 101 and the second electrode 201 are described as having the same shape and area, and the same values ​​of M1, M2, N1, and N2.

[0071] Optionally, the values ​​of M1, M2, N1 and N2 can be 3, 4, 5, etc. For example, Figure 3 As shown, taking the values ​​of M1, M2, N1, and N2 as 4 as an example, the first electrode 101 includes 4*4 first sub-electrodes 101a, and the second electrode 201 includes 4*4 second sub-electrodes 201a. The orthographic projections of each first sub-electrode 101a and second sub-electrode 201a on the first insulating layer 30 are regular quadrilaterals, such as rectangles or squares. The first sub-electrodes 101a in the first electrode 101 are arranged in an array to form a grid structure, and the second sub-electrodes 201a in the second electrode 201 are arranged in an array to form a grid structure. Optionally, the interconnected sub-electrodes are connected in a continuous film layer.

[0072] Optionally, the orthographic projection of each first sub-electrode 101a outside the first region of the first electrode 101 on the first insulating layer 30 partially overlaps with the orthographic projection of each second sub-electrode 201a outside the second region of the second electrode 201 on the first insulating layer 30. Figure 1 As shown, the overlapping area of ​​the orthographic projection of each first sub-electrode 101a outside the first area in the first electrode 101 on the first insulating layer and the orthographic projection of each second sub-electrode 201a outside the second area in the second electrode 201 on the first insulating layer 30 is recorded as the projection overlapping area Q. In the projection overlapping area Q, when a finger or other conductive object touches the screen, a coupling capacitance is formed between the touch point and the first electrode 101 and the second electrode 201. According to the change of the capacitance in the touch module, the exact position of the touch point can be determined.

[0073] Based on the grid-like structural design of the first electrode 101 and the second electrode 201 , the disclosed embodiment can flexibly adjust the capacitive touch area and electromagnetic touch area in the touch module, thereby flexibly adjusting the capacitive touch sensing capability and electromagnetic touch sensing capability of the touch module.

[0074] Specifically, when the capacitive touch area increases, the capacitive touch sensing capability of the touch module increases, and when the capacitive touch area decreases, the capacitive touch sensing capability of the touch module decreases; similarly, when the electromagnetic touch area increases, the electromagnetic touch sensing capability of the touch module increases, and when the electromagnetic touch area decreases, the electromagnetic touch sensing capability of the touch module decreases.

[0075] In a specific implementation, the first region includes at least one first sub-electrode 101a, and the second region includes at least one second sub-electrode 201a. Since the first sub-electrodes 101a in the first region are connected to the first electromagnetic coil 102 and are used for electromagnetic touch sensing, the more first sub-electrodes 101a in the first region, the stronger the electromagnetic touch sensing capability. Similarly, the second sub-electrodes 201a in the second region are connected to the second electromagnetic coil 202 and are used for electromagnetic touch sensing. Therefore, the more second sub-electrodes 201a in the second region, the stronger the electromagnetic touch sensing capability.

[0076] The connection structure between the first sub-electrode 101a in the first region of the first electrode 101 and the first electromagnetic coil 102 can be referred to. Figure 5 , Figure 5 for Figure 3 A partial enlarged view of the middle area C, for ease of display, Figure 5 The connection between the first electrode 101 and the first electromagnetic coil 102 is represented by a yellow grid, and the first electrode 101 is represented by a purple grid. In a specific implementation, the first electrode 101, the first electromagnetic coil 102 and the connection between them are formed in the same process.

[0077] Compared with the related art, the touch module of the embodiment of the present invention integrates the first electromagnetic induction structure into the first touch layer of the capacitive sensing structure, and integrates the second electromagnetic induction structure into the second touch layer of the capacitive sensing structure. On the one hand, integrating the EMR coil into the FMLOC touch layer can improve the detection accuracy and sensitivity of the touch module. On the other hand, there is no need to add additional processes and the thickness of the touch module will not increase. In addition, the sub-electrodes inside each first electrode and each second electrode are designed to be arranged in a grid-like array. The grid-like sub-electrodes can be designed into a modular structure, which is convenient for expansion or adjustment according to actual needs. Part of the FMLOC touch structure can be flexibly connected to the EMR coil to enhance the electromagnetic signal strength, further improve the sensitivity and accuracy of the touch, and achieve more precise touch detection.

[0078] In one possible implementation, Figure 4 and Figure 7 As shown, the projection area of ​​the orthographic projection of the first region on the first insulating layer 30 is the same as the projection area of ​​the orthographic projection of the second region on the first insulating layer 30, and the sum of the areas of the orthographic projection of the first region on the first insulating layer 30, the projection of the orthographic projection of the second region on the first insulating layer 30, and the projection overlapping area Q is the area of ​​the orthographic projection of the first electrode 101 or the second electrode 201 on the first insulating layer 30, and the projection overlapping area Q is the overlapping area of ​​the orthographic projection of each first sub-electrode 101a outside the first region in the first electrode 101 on the first insulating layer 30 and the orthographic projection of each second sub-electrode 201a outside the second region in the second electrode 201 on the first insulating layer 30.

[0079] like Figure 4 and Figure 7 As shown, when the values ​​of N1, N2, M1 and M2 are all 4, it is assumed that each first sub-electrode 101a is represented by A ij , each second sub-electrode 201a is represented by B ij , where i represents the position of the first sub-electrode and the second sub-electrode in the second direction, j represents the position of the first sub-electrode and the second sub-electrode in the first direction, i is greater than or equal to 1 and less than or equal to 4, j is greater than or equal to 1 and less than or equal to 4, that is, in the first electrode 101, the first sub-electrode that is the jth in the first direction and the ith in the second direction is represented by A ij In the second electrode 201, the second sub-electrode which is the jth in the first direction and the ith in the second direction is represented by B ij .

[0080] At this time, the first area is Figure 4As shown in the red solid line frame, it includes a first sub-region C11 and a second sub-region C12. The first sub-region C11 includes a first sub-electrode A 11 、A 12 、A 13 and A 22 , the first sub-electrode A 11 、A 12 、A 13 and A 22 The second sub-region C12 includes a first sub-electrode A 33 、A 42 、A 43 and A 44 , the first sub-electrode A 33 、A 42 、A 43 and A 44 The first sub-electrodes in the first sub-region C11 are connected to the adjacent first coil structure 102, and the first sub-electrodes in the second sub-region C12 are connected to the adjacent second coil structure 102. At the same time, the first sub-electrodes outside the first region of the first electrode 101 are connected to each other, such as Figure 4 As shown, the third area C3 outside the first area is as shown in FIG. Figure 4 As shown in the green solid line frame, it includes the first sub-electrode A 14 、A 21 、A 31 、A 41 、A 32 、A 23 、A 24 、A 34 , and the first sub-electrodes are connected to each other.

[0081] The second area includes Figure 7 As shown in the green solid line frame, it includes a third sub-region C21 and a fourth sub-region C22. The third sub-region C21 includes the second sub-electrode B 21 、B 31 、B 41 and B 32 , the second sub-electrode B 21 、B 31 、B 41 and B 32 interconnected, the fourth sub-region C22 includes the second sub-electrode B 14 、B 24 、B 34 and B 23 , the second sub-electrode B 14 、B 24 、B 34 and B 23The second sub-electrodes in the third sub-region C21 are connected to the adjacent second coil structure 202, and the second sub-electrodes in the fourth sub-region C22 are connected to the adjacent second coil structure 202. At the same time, the second sub-electrodes outside the second region of the second electrode 201 are connected to each other, such as Figure 7 As shown, the fourth area C4 outside the second area is as shown in FIG. Figure 7 As shown in the red solid line box, it includes the second sub-electrode B 11 、B 12 、B 13 、B 22 、B 33 、B 42 、B 43 、B 44 , and each second sub-electrode is connected.

[0082] It is understood that in the embodiment of the present disclosure, the sub-electrodes in a certain area are connected, which can be understood as the sub-electrodes in the area are connected, that is, the area where the sub-electrodes are located is connected, for example: the first sub-electrode A in the first sub-area C11 is connected to the first sub-electrode A. 11 、A 12 、A 13 and A 22 connection, which can be understood as the first sub-electrode A 11 、A 12 、A 13 and A 22 is connected, that is, the first sub-electrode A 11 、A 12 、A 13 and A 22 The orthographic projection on the first insulating layer 30 is an uninterrupted, complete, connected area. In a specific implementation, for example, during the preparation of the first touch layer 10, a single patterning process is used to form the first sub-region C11, the second sub-region C12, and the third region C3; and during the preparation of the second touch layer 20, a single patterning process is used to form the third sub-region C21, the fourth sub-region C22, and the fourth region C4.

[0083] In the disclosed embodiment, one-half of the first sub-electrode 101a of the first electrode 101 is connected to the first electromagnetic coils 102 on either side of the first electrode 101, and is used for electromagnetic touch. The other half of the first sub-electrode 101a is used for capacitive touch. By utilizing part of the first electrode 101 for electromagnetic touch, this embodiment can increase the electromagnetic touch area, thereby improving the strength and coverage of the electromagnetic signal. This allows for a wider touch coverage area and more diverse and refined detectable electromagnetic signal changes, facilitating precise recognition and enhancing touch sensitivity and accuracy.

[0084] In one possible implementation, the orthographic projection of the first region on the first insulating layer 30 and the orthographic projection of the second region on the first insulating layer 30 have the same projected area, and the area of ​​the orthographic projection of the first region on the first insulating layer 30 is smaller than the area of ​​the orthographic projection of the region outside the first region of the first electrode 101 on the first insulating layer 30. Furthermore, the sum of the areas of the orthographic projection of the first region on the first insulating layer 30 and the overlapping area Q of the projections is smaller than the area of ​​the orthographic projection of the region outside the first region of the first electrode 101 on the first insulating layer 30.

[0085] For example, please refer to Figures 8 to 11 , Figure 8 is a plan view of another embodiment of the first touch layer, Figure 9 for Figure 8 An enlarged view of any first electrode in Figure 10 is a plan view of another embodiment of the second touch layer, Figure 11 for Figure 10 Assume that the values ​​of M1, M2, N1 and N2 are all 4, and each first sub-electrode 101a is represented by A ij , each second sub-electrode 201a is represented by B ij , where i represents the position of the first sub-electrode and the second sub-electrode in the second direction, and j represents the position of the first sub-electrode and the second sub-electrode in the first direction. That is, in the first electrode 101, the first sub-electrode that is the jth in the first direction and the ith in the second direction is represented by A ij In the second electrode 201, the second sub-electrode which is the jth in the first direction and the ith in the second direction is represented by B ij .

[0086] like Figures 8 and 9 As shown, the first area is as Figure 9 As shown in the red solid line frame, it includes a first sub-region C11 and a second sub-region C12. The first sub-region C11 includes a first sub-electrode A 12 and A 22 , the first sub-electrode A 12 and A 22 interconnected, the second sub-region C12 includes the first sub-electrode A 33 and A 43 , the first sub-electrode A 33 and A 43 The first sub-electrodes in the first sub-region C11 are connected to the adjacent first coil structure 102, and the first sub-electrodes in the second sub-region C12 are connected to the adjacent second coil structure 102; at the same time, the first sub-electrodes outside the first region of the first electrode 101 are connected to each other, such as Figure 9 As shown, the third area C3 outside the first area is as shown in FIG. Figure 9 As shown in the green solid line frame, it includes the first sub-electrode A 11 、A 13 、A 14 、A 21 、A 23 、A 24 、A 31 、A 32 、A 34 、A 41 、A 42 、A 44 , and the first sub-electrodes are connected to each other.

[0087] like Figures 10 and 11 As shown, the second area is Figure 11 As shown in the green solid line frame, it includes a third sub-region C21 and a fourth sub-region C22. The third sub-region C21 includes the second sub-electrode B 31 and B 32 , the second sub-electrode B 31 and B 32 interconnected, the fourth sub-region C22 includes the second sub-electrode B 23 and B 24 , the second sub-electrode B 23 and B 24 The second sub-electrodes in the third sub-region C21 are connected to the adjacent second coil structure 202, and the second sub-electrodes in the fourth sub-region C22 are connected to the adjacent second coil structure 202. At the same time, the second sub-electrodes outside the second region of the second electrode 201 are connected to each other, such as Figure 11 As shown, the fourth area C4 outside the second area is as shown in FIG. Figure 9 As shown in the green solid line box, it includes the second sub-electrode B 11 、B 12 、B 13 、B 14 、B 21 、B 22 、B 33 、B 34 、B 41 、B 42 、B 43 、B 44 , and each second sub-electrode is connected to each other.

[0088] In the embodiment of the present disclosure, the four first sub-electrodes 101a in the first electrode 101 are connected to the first coil structure 102, and the four second sub-electrodes 201a in the second electrode 201 are connected to the second coil structure 202, which is equivalent to about a quarter of the area of ​​the first electrode 101 or the second electrode 201 being used for electromagnetic touch, and the remaining about three-quarters of the area being used for capacitive touch. Figures 4 to 7 Compared with the illustrated embodiment, the electromagnetic touch area is reduced and the capacitive touch area is increased, which can improve the strength and coverage of the capacitive touch, making the capacitive touch area cover a wider area, helping to achieve fine recognition and improve the sensitivity and accuracy of the capacitive touch.

[0089] It will be appreciated that in the disclosed embodiment, the first sub-electrodes 101a within the first sub-region C11 and the second sub-region C12 need to be connected to their respective adjacent first electromagnetic coils 102. Since the first electromagnetic coil 102 extends along the first direction, the first sub-region C11 can include at least one first sub-electrode 101a adjacent to the first electromagnetic coil 102 in the second direction, and the second sub-region C12 can include at least one first sub-electrode 101a adjacent to the first electromagnetic coil 102 in the second direction. Similarly, for the third sub-region C21 and the fourth sub-region C22, since the second electromagnetic coil 202 extends along the second direction, the third sub-region C21 can include at least one second sub-electrode 201a adjacent to the second electromagnetic coil 202 in the first direction, and the fourth sub-region C22 can include at least one second sub-electrode 201a adjacent to the second electromagnetic coil 202 in the first direction. With such a configuration, the connection between the first sub-electrode 101a and the first electromagnetic coil 102 in the first sub-area C11 and the second sub-area C12, and the connection between the second sub-electrode 201a and the second electromagnetic coil 202 in the third sub-area C21 and the fourth sub-area C22 can be achieved through a connection portion with a simple structure and the shortest path.

[0090] Optionally, the first touch layer 10 and the second touch layer 20 in the embodiments of the present disclosure can be made of materials such as nickel, platinum, copper, selenium, cobalt, aluminum, copper, metal foil, and conductive silver paste. It is understood that the first sub-region C11, the second sub-region C12, the third sub-region C21, the fourth sub-region C22, the third region C3, and the fourth region C4 described in the above embodiments, where the sub-electrodes within each region are connected, can also be understood to be integrally formed during the manufacturing process and manufactured in a single step through the manufacturing process.

[0091] It is understood that in the disclosed embodiment, the first electrodes 101 and the second electrodes 201 are arranged in a grid structure arranged in an array along the first and second directions. On the one hand, the grid structure can be made of low-cost conductive materials such as copper, which has a higher cost-performance ratio than other materials. On the other hand, the grid structure design makes the manufacturing process of the touch electrodes simpler and more efficient, helping to reduce production costs and improve production efficiency. In addition, the grid structure makes the electrodes denser within a limited space, capable of more precisely capturing changes in touch position, thereby improving touch sensitivity and accuracy. Compared with sparsely distributed electrodes, the grid structure reduces blind spots in the touch area, making touch operation smoother and more precise.

[0092] Similarly, the first electrode 101 is further designed to include a plurality of first sub-electrodes arranged in an array along the first direction and the second direction, and the second electrode 201 is further designed to include a plurality of second sub-electrodes arranged in an array along the first direction and the second direction, which also has the advantages of the above-mentioned grid structure. In addition, by setting each first sub-electrode in the first electrode to a grid structure, and setting each second sub-electrode in the second electrode to a grid structure, it is also convenient to use some of the first sub-electrodes as electromagnetic touch, and some of the second sub-electrodes as electromagnetic touch. Specifically, the grid electrode can be designed as a modular structure, which is convenient for expansion or adjustment according to actual needs. For example, when it is necessary to enhance electromagnetic induction, the number of sub-electrodes in the first area or the second area can be conveniently increased or the layout of the sub-electrodes in the first area or the second area can be adjusted. By adjusting the arrangement and size of the sub-electrodes in the grid, the area and range of electromagnetic induction can also be precisely controlled to meet the needs of different application scenarios.

[0093] Optional, such as Figure 3 、 Figure 6 、 Figure 8 as well as Figure 10 As shown, in the first touch layer 10, in the first direction, the first sub-electrodes 101a in the third region C3 of two adjacent first electrodes 101 are connected via a first connecting portion 104. That is, in the first direction, the first sub-electrodes 101a used in the capacitive sensing structure of the two adjacent first electrodes 101 are connected via the first connecting portion 104. Similarly, in the second touch layer 20, in the second direction, the second sub-electrodes 201a in the fourth region C4 of two adjacent second electrodes 201 are connected via a second connecting portion 204. That is, in the second direction, the second sub-electrodes 201a used in the capacitive sensing structure of the two adjacent second electrodes 201 are connected.

[0094] Optionally, the width of the first connecting portion 104 and the second connecting portion 204 is 5 to 30 microns. Figure 3 As shown, the width of the first connecting portion 104 is recorded as W1, which represents the length of the first connecting portion 104 in the first direction; Figure 6 As shown, the width of the second connection portion 204 is recorded as W2, which represents the length of the second connection portion 204 in the second direction.

[0095] In one possible implementation, the first electromagnetic coil 102 includes two first conductors 1021 that are parallel to each other and extend along a first direction. The two first conductors 1021 are connected to form a U-shaped structure. The second electromagnetic coil 202 includes two second conductors 2021 that are parallel to each other and extend along a second direction. The two second conductors 2021 are connected to form a U-shaped structure. Optionally, the orthographic projections of the first conductors 1021 on the first insulating layer 30 are located within a first gap formed in the second direction between adjacent first electrodes 101 when the first electrodes 101 are arranged in an array. The orthographic projections of the second conductors 2021 on the first insulating layer 30 are located within a second gap formed in the first direction between adjacent second electrodes 201 when the second electrodes 201 are arranged in an array.

[0096] Among them, for the U-shaped first electromagnetic coil 102 and second electromagnetic coil 202, the larger the distance between the two first conductors 1021, the larger the loop area of ​​the first electromagnetic coil 102, and the larger the distance between the two second conductors 2021, the larger the loop area of ​​the second electromagnetic coil 202.

[0097] Optionally, the loop of the first electromagnetic coil 102 includes a row of first electrodes 101, and the loop of the second electromagnetic coil 202 includes a column of second electrodes 201. With this arrangement, due to the small spacing between the two first conductors 1021 or the two second conductors 2021, the loop area of ​​the first electromagnetic coil 102 and the second electromagnetic coil 202 is also small, resulting in a larger resistance of the first electromagnetic coil 102 and the second electromagnetic coil 202, and more lead wires to the electromagnetic coils.

[0098] In order to solve the above problem, the circuit of the first electromagnetic coil 102 is configured to include multiple rows of first electrodes 101, and the circuit of the second electromagnetic coil 202 is configured to include multiple columns of second electrodes 201. For example, Figure 3 、 Figure 6 As shown, the loop of the first electromagnetic coil 102 includes two rows of first electrodes 101 , and the loop of the second electromagnetic coil 202 includes two columns of second electrodes 201 .

[0099] In a possible implementation, every three rows of first electrodes are surrounded by at least two first electromagnetic coils, and every three columns of second electrodes are surrounded by at least two second electromagnetic coils.

[0100] Optionally, in the second direction, the plurality of first electromagnetic coils 102 form at least one first electromagnetic coil group 102A, wherein the first electromagnetic coil group 102A includes at least two adjacent first electromagnetic coils 102, and the at least two adjacent first electromagnetic coils 102 partially overlap to form a first overlapping region. In the first direction, the plurality of second electromagnetic coils 202 form at least one second electromagnetic coil group 202A, wherein the second electromagnetic coil group 202A includes at least two adjacent second electromagnetic coils 202, and the at least two adjacent second electromagnetic coils 202 partially overlap to form a second overlapping region.

[0101] For example, please refer to Figure 12 , Figure 12 is a structural diagram of another embodiment of a touch module, Figure 12 The film layer where the blue line is located represents the first touch layer 10, the film layer where the red line is located represents the second touch layer 20, and the first insulating layer 30 is located in the middle. Figure 12 The electrodes T filled with shadows and arranged in an array are only used to illustrate the positions of the first electrodes 101 and the second electrodes 201, and the connection relationship between the first electrodes 101 and the connection relationship between the second electrodes 201 are not shown in the figure. Figure 12 As shown in the figure. Figure 12 As shown, any first electromagnetic coil assembly 102A includes two first electromagnetic coils 102, each of which includes two rows of first electrodes 101 within its loop. The loops of the two first electromagnetic coils 102 have an overlapping region, which includes a row of first electrodes 101. Correspondingly, any second electromagnetic coil assembly 202A includes two second electromagnetic coils 202, each of which includes two columns of second electrodes 201 within its loop. The loops of the two second electromagnetic coils 202 have an overlapping region, which includes a row of second electrodes 201.

[0102] In the disclosed embodiments, adjacent electromagnetic coils within the first or second electromagnetic coil groups are arranged to partially overlap. This partially overlapping arrangement increases the number of turns of the electromagnetic coils, forming a denser magnetic field network and helping to improve the precise identification of the touch point location. When the stylus approaches the touch module, the electromagnetic signal it generates interacts with the multiple overlapping electromagnetic coils. Comprehensive analysis of the signals sensed by the multiple electromagnetic coils provides more accurate coordinate information, effectively reducing positioning errors and improving the precision of touch recognition. Furthermore, the overlapping arrangement of electromagnetic coils increases the surface area for signal reception, thereby increasing the sensitivity of signal reception, helping to accurately identify touch operations even in weak signal environments and improving the precision and stability of touch recognition. Furthermore, in applications requiring high-precision touch, such as drawing tablets and handwriting input devices, the overlapping arrangement of electromagnetic coils can provide more accurate pen positioning and a smoother writing experience, helping users more accurately express their creativity and ideas, thereby improving work efficiency and creative quality.

[0103] When the two first electromagnetic coils 102 within the first electromagnetic coil assembly 102A partially overlap, the routing of the two first electromagnetic coils 102 may cross. To prevent this, interlayer jumper technology is used at the intersection. Similarly, when the two second electromagnetic coils 202 within the second electromagnetic coil assembly 202A partially overlap, the routing of the two second electromagnetic coils 202 may also cross. This can also be avoided by using interlayer jumper technology. Interlayer jumper technology is a common technique in multi-layer PCB design, used to connect signal lines between different layers, thereby optimizing wiring, reducing routing length, and avoiding unnecessary signal crossing, thereby reducing interference.

[0104] In one possible implementation, Figure 12 As shown, the first insulating layer 30 is provided with a first via in the first overlapping area, the second touch layer 20 also includes a second connecting coil 205 provided in the first overlapping area, and the partially overlapping first electromagnetic coil 102 realizes interlayer jumper through the first via and the second connecting coil 205; the first insulating layer 30 is provided with a second via in the second overlapping area, the first touch layer 10 also includes a first connecting coil 105 provided in the second overlapping area, and the partially overlapping second electromagnetic coil 202 realizes interlayer jumper through the second via 302 and the first connecting coil 105.

[0105] In one possible implementation, the opening directions of the first electromagnetic coils in the first electromagnetic coil group are the same, and the opening directions of the first electromagnetic coils in adjacent first electromagnetic coil groups are different; and / or the opening directions of the second electromagnetic coils in the second electromagnetic coil group are the same, and the opening directions of the second electromagnetic coils in adjacent second electromagnetic coil groups are different.

[0106] For example, please refer to Figure 13 , Figure 13 This is a structural diagram of another embodiment of the touch module provided by the embodiment of the present disclosure. Figure 13 The film layer where the blue line is located represents the first touch layer 10, the film layer where the red line is located represents the second touch layer 20, and the first insulating layer 30 is located in the middle. Figure 13 Not shown, such as Figure 13 As shown, the opening directions of the first electromagnetic coils 102 in the first electromagnetic coil group 102A are the same, as shown in FIG. Figure 13 Y1 to Y4 are located on the same side, Y5 to Y8 are located on the same side, and the opening directions of the first electromagnetic coils 102 of adjacent first electromagnetic coil groups 102A are different, such as Figure 13 In the Y direction, from top to bottom of the three first electromagnetic coil groups 102A, the opening direction of the first first electromagnetic coil group 102A is the left side, the opening direction of the second first electromagnetic coil group 102A is the right side, the opening direction of the third first electromagnetic coil group 102A is the left side, and so on.

[0107] It is understandable that Figure 13 In the illustrated embodiment, the opening directions of the second electromagnetic coils 202 of adjacent second electromagnetic coil groups 202A are the same. In other embodiments, the opening directions of the second electromagnetic coils 202 of adjacent second electromagnetic coil groups 202A may also be different.

[0108] Furthermore, in other embodiments, in the touch module, in the second direction, such as from top to bottom in the Y direction, the opening direction of the upper half of the first electromagnetic coil assembly 102A is to the left, and the opening direction of the lower half of the first electromagnetic coil assembly 102A is to the right. Similarly, in the first direction, such as from left to right in the X direction, the opening direction of the left half of the second electromagnetic coil assembly 202A is to the bottom, and the opening direction of the right half of the second electromagnetic coil assembly 202A is to the top.

[0109] In an electromagnetic touch structure, when an electromagnetic pen, such as a stylus or a conductive object like a finger, moves over the touch module, it changes the magnetic field distribution within the electromagnetic coil within the touch module, generating an electrical signal. When the electromagnetic coil's opening is oriented both upward and downward, and both left and right, a more complex magnetic field distribution can be formed, making the electromagnetic induction more sensitive. This helps improve the touch module's responsiveness to subtle movements and enables more precise touch operations.

[0110] In one possible implementation, the first touch layer 10 further includes a plurality of first traces 103 extending along a first direction, the first traces 103 being connected to a first sub-electrode 101a outside the first region of the first electrode 101. The second touch layer 20 further includes a plurality of second traces 203 extending along a second direction, the second traces 203 being connected to a second sub-electrode 301a outside the second region of the second electrode 201. Assuming that the area outside the first region of the first electrode 101 is denoted as a third region C3, and the area outside the second region of the second electrode 201 is denoted as a fourth region C4, the first sub-electrode 101a within the third region C3 of the first electrode 101 serves as one of the two electrodes of the capacitive sensing structure (e.g., a driving electrode or a sensing electrode), and the second sub-electrode 201a within the fourth region C4 of the second electrode 201 serves as the other of the two electrodes of the capacitive sensing structure (e.g., a sensing electrode or a driving electrode).

[0111] For example, please refer to Figures 14 and 15 , Figure 14 is a schematic diagram of the first electrode and the first trace on the first touch layer, Figure 15 is a schematic diagram of the second electrode and the second trace on the second touch layer, as shown Figures 14 and 15 As shown, the first touch layer includes first electrodes arranged in a 9*9 array, and the second touch layer includes second electrodes arranged in a 9*9 array. Assuming that the first electrodes serve as sensing electrodes and the second electrodes serve as driving electrodes, the first traces 103 serve as sensing lines and the second traces 203 serve as driving lines. The first traces 103 (for example, R1, R2, R3, R4, R5, R6, R7, R8, and R9 in the figure) are used to receive sensing signals at the first sub-electrode 101a in the third area C3 of the first electrode 101, and the second traces 203 (for example, T1, T2, T3, T4, T5, T6, T7, T8, and T9 in the figure) are used to send driving signals to the second sub-electrode 201a in the fourth area C4 of the sensing electrode 202.

[0112] It is understandable that Figure 14 The first coil structure is not shown in the figure. The connection relationship between the first coil structure and the first electrode can be referred to Figure 3 、 Figure 8 、 Figure 12 、 Figure 13The embodiment shown, and Figure 14 The specific structure of the first electrode 101 and the first connecting portion 104 can be referred to Figures 3 and 4 as well as Figures 8 and 9 The embodiment shown; Figure 15 The second coil structure is not shown in the figure. The second coil structure and the connection relationship between the second coil structure and the second electrode can be referred to Figure 6 、 Figure 10 、 Figure 12 、 Figure 13 In the embodiment shown, the specific details of the second electrode 201 and the second connecting portion 204 can be referred to Figures 6 and 7 as well as Figures 10 and 11 The embodiment shown.

[0113] In one possible implementation, the touch module further includes: a touch detection circuit, which is connected to the capacitive sensing structure, the first electromagnetic induction structure, and the second electromagnetic induction structure, and is configured to sequentially drive the capacitive sensing structure, the first electromagnetic induction structure, and the second electromagnetic induction structure in a preset order to perform touch detection.

[0114] For example, please refer to Figure 16 , Figure 16 The timing diagram of the touch detection circuit controlling the capacitive sensing structure (denoted as FMLOC), the first electromagnetic induction structure (denoted as EMR1) and the second electromagnetic induction structure (denoted as EMR2) to perform touch detection is shown as follows: Figure 16 As shown, the capacitive sensing structure, the first electromagnetic induction structure, and the second electromagnetic induction structure perform touch detection in different time periods. For example, the capacitive sensing structure is first controlled to work, then the first electromagnetic induction structure is controlled to work, and finally the second electromagnetic induction structure is controlled to work, and then the capacitive sensing structure is controlled to work again, and the cycle is repeated in sequence to achieve time-sharing detection of capacitive touch and electromagnetic touch.

[0115] When the capacitive sensing structure is operating, the second trace T1 is used to transmit the drive signal, and the first trace R1 is used to transmit the sensing signal. Specifically, the touch detection circuit generates a drive signal of a specific frequency and transmits the drive signal to the second electrode connected to the second trace T1 via the second trace T1. Simultaneously, the touch detection circuit receives the sensing signal from the first electrode connected to the first trace R1 via the first trace R1. The touch detection circuit determines the location of the touch point by analyzing certain properties of the sensing signal, such as phase difference, time difference, or frequency change.

[0116] The operation of either the first or second electromagnetic induction structure includes a charging phase and a sensing phase. During the charging phase, the touch module sends a low-frequency electromagnetic signal to the electromagnetic pen, charging the pen's circuit or activating its sensing mechanism. Once activated, the pen generates its own high-frequency signal based on the received energy. During the sensing phase, the touch module receives and analyzes the signal from the electromagnetic pen to determine its position and possible pressure or tilt information.

[0117] It is understandable that Figure 16 The driving timing of a single capacitive sensing unit and a single electromagnetic induction unit is only schematically described, where a single capacitive sensing unit refers to a capacitive sensing structure formed by a first electrode and a second electrode, such as the capacitive sensing unit defined by R1 and T1, and a single electromagnetic induction unit refers to a single first electromagnetic coil (such as the first electromagnetic coil corresponding to Y1 and Y3) or a single second electromagnetic coil (such as the second electromagnetic coil corresponding to X10 and X12). In specific implementations, when the capacitive sensing structure is operating, the touch detection circuit will simultaneously send drive signals to each capacitive sensing unit in the touch module and receive sensing signals; and when the first electromagnetic induction structure or the second electromagnetic induction structure is operating, it controls all first electromagnetic coils in the first electromagnetic induction structure or all second electromagnetic coils in the second electromagnetic induction structure for charging or sensing.

[0118] Based on the same inventive concept, a second aspect of the present disclosure provides a touch display device comprising a display panel and the aforementioned touch module, the touch module being disposed on the light-emitting side of the display panel. Specifically, the touch module comprises a first touch layer, a first insulating layer, and a second touch layer stacked in sequence. In one implementation, the first touch layer is disposed on the side closest to the display panel. In other implementations, the second touch layer may also be disposed on the side closest to the display panel.

[0119] Optionally, an inorganic layer and a barrier layer may be provided between the display panel and the touch module. Figure 17 , Figure 17 FIG. 1 is a structural diagram of a touch display device according to an embodiment of the present disclosure. Figure 17 As shown, the touch display device includes a display panel 40, a first inorganic layer 401, a first barrier layer 402, a first touch layer 10, a first insulating layer 30, a second touch layer 20 and a cover layer 50 stacked in sequence in the light emitting direction of the display panel.

[0120] For example, the first inorganic layer 401 can be formed of inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride, and can be prepared by a chemical vapor deposition (CVD) process.

[0121] For example, the first barrier layer 402 may be formed of an inorganic insulating material such as silicon oxide, silicon nitride, or silicon oxynitride.

[0122] Exemplarily, the cover layer 50 may be prepared by using a ToC (Touch of Color) glaze process.

[0123] The display panel may be an organic light-emitting diode (OLED) display panel. It is understood that the display panel may be of other types according to actual needs. For example, the display panel may be a quantum dot light-emitting diode (QLED) display panel or a micro light-emitting diode (MicroLED) display panel.

[0124] Exemplarily, the touch display device can be any product or component with display and touch functions, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc., which is not limited in this embodiment.

[0125] Based on the same inventive concept, the second aspect of the present disclosure provides a method for preparing a touch module. Figure 18 , including the following steps:

[0126] Step S10: preparing a first touch layer, the first touch layer comprising a plurality of first electrodes and a plurality of first electromagnetic coils, the plurality of first electrodes being arranged in an array along a first direction and a second direction, the plurality of first electromagnetic coils extending along the first direction and arranged in an array along the second direction, the first electrode comprising a plurality of first sub-electrodes arranged in an array, the first sub-electrodes within a first region of the first electrode being connected to the first electromagnetic coil, and the first sub-electrodes outside the first region of the first electrode being electrically connected;

[0127] Step S20, preparing a first insulating layer on the first touch layer;

[0128] Step S30: Forming a second touch layer on the first insulating layer, the second touch layer comprising a plurality of second electrodes and a plurality of second electromagnetic coils, the plurality of second electrodes being arranged in an array along a first direction and a second direction, the plurality of second electromagnetic coils extending along the second direction and arranged in an array along the first direction, the second electrode comprising a plurality of second sub-electrodes arranged in an array, the second sub-electrodes in a second region of the second electrode being connected to the second electromagnetic coils, the second sub-electrodes outside the second region of the second electrode being electrically connected, the orthographic projections of the first region and the second region on the first insulating layer not overlapping, and the orthographic projections of the first sub-electrodes outside the first region of the first electrode on the first insulating layer at least partially overlapping with the orthographic projections of the second sub-electrodes outside the second region of the second electrode on the first insulating layer;

[0129] The first sub-electrode outside the first region of the first electrode and the second sub-electrode outside the second region of the second electrode form a capacitive sensing structure, the first sub-electrode within the first region of the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode within the second region of the second electrode and the second electromagnetic coil form a second electromagnetic induction structure.

[0130] Please refer to Figure 19 , Figure 19 The process flow chart for preparing a touch module on a display panel is as follows: Figure 19 As shown, the overall process includes:

[0131] (1) depositing a first inorganic layer 401;

[0132] (2) preparing a first barrier layer 402 on the first inorganic layer 401;

[0133] (3) preparing a first touch layer 10 on the first barrier layer 402;

[0134] (4) preparing a first insulating layer 30 on the first touch layer 10;

[0135] (5) preparing a second touch layer 20 on the first insulating layer 30;

[0136] (6) A cover layer 50 is prepared on the second touch layer 20 .

[0137] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not intended to limit the implementation methods of the present disclosure. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to enumerate all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present disclosure are still within the scope of protection of the present disclosure.

Claims

1. A touch module, characterized in that: It includes a first touch layer, a first insulating layer and a second touch layer stacked in sequence; The first touch layer includes a plurality of first electrodes and a plurality of first electromagnetic coils, the plurality of first electrodes are arranged in an array along a first direction and a second direction, the plurality of first electromagnetic coils extend along the first direction and are arranged in an array along the second direction, and the second touch layer includes a plurality of second electrodes and a plurality of second electromagnetic coils, the plurality of second electrodes are arranged in an array along the first direction and the second direction, the plurality of second electromagnetic coils extend along the second direction and are arranged in an array along the first direction; The first electrode includes a plurality of first sub-electrodes arranged in an array, wherein the first sub-electrodes in a first region of the first electrode are connected to the first electromagnetic coil, and the first sub-electrodes outside the first region of the first electrode are connected to each other. The second electrode includes a plurality of second sub-electrodes arranged in an array, wherein the second sub-electrodes in a second region of the second electrode are connected to the second electromagnetic coil, and the second sub-electrodes outside the second region of the second electrode are connected to each other. The orthographic projections of the first region and the second region on the first insulating layer do not overlap, and the orthographic projections of the first sub-electrodes outside the first region of the first electrode on the first insulating layer at least partially overlap with the orthographic projections of the second sub-electrodes outside the second region of the second electrode on the first insulating layer. The first sub-electrode outside the first area of ​​the first electrode and the second sub-electrode outside the second area of ​​the second electrode form a capacitive sensing structure, the first sub-electrode within the first area of ​​the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode within the second area of ​​the second electrode and the second electromagnetic coil form a second electromagnetic induction structure.

2. The touch module according to claim 1, wherein: The first electrode includes N1*M1 first sub-electrodes arranged in an array along the first direction and the second direction, and the second electrode includes N2*M2 second sub-electrodes arranged in an array along the first direction and the second direction, wherein N1 and N2 are natural numbers greater than or equal to 3, M1 and M2 are natural numbers greater than or equal to 3, the first area includes at least one of the first sub-electrodes, and the second area includes at least one of the second sub-electrodes.

3. The touch module according to claim 2, wherein: The projection area of ​​the orthographic projection of the first region on the first insulating layer is the same as the projection area of ​​the orthographic projection of the second region on the first insulating layer, and the sum of the areas of the orthographic projection of the first region on the first insulating layer, the orthographic projection of the second region on the first insulating layer, and the projection overlapping area is the area of ​​the orthographic projection of the first electrode or the second electrode on the first insulating layer, and the projection overlapping area is the overlapping area of ​​the orthographic projection of each first sub-electrode outside the first region in the first electrode on the first insulating layer and the orthographic projection of each second sub-electrode outside the second region in the second electrode on the first insulating layer.

4. The touch module according to claim 3, wherein: The values ​​of N1, N2, M1 and M2 are all 4; in the first electrode, the first sub-electrode which is the jth in the first direction and the ith in the second direction is represented by A ij In the second electrode, the second sub-electrode which is the jth in the first direction and the ith in the second direction is represented by B ij ; The first region includes a first sub-region and a second sub-region. The first sub-region includes a first sub-electrode A 11 、A 12 、A 13 and A 22 The second sub-region includes a first sub-electrode A 33 、A 42 、A 43 and A 44 , the first sub-electrode in the first sub-region is connected to the adjacent first coil structure, and the first sub-electrode in the second sub-region is connected to the adjacent second coil structure; The second region includes a third sub-region and a fourth sub-region, and the third sub-region includes a second sub-electrode B 21 、B 31 、B 41 and B 32 The fourth sub-region includes the second sub-electrode B 14 、B 24 、B 34 and B 23 The second sub-electrode in the third sub-region is connected to the adjacent second coil structure, and the second sub-electrode in the fourth sub-region is connected to the adjacent second coil structure.

5. The touch module according to claim 2, wherein: The projected area of ​​the orthographic projection of the first region on the first insulating layer is the same as the projected area of ​​the orthographic projection of the second region on the first insulating layer, and the sum of the areas of the orthographic projection of the first region on the first insulating layer and the overlapping area of ​​the projections is smaller than the area of ​​the orthographic projection of the area outside the first region in the first electrode on the first insulating layer, and the overlapping area of ​​the projections is the overlapping area of ​​the orthographic projection of each first sub-electrode outside the first region in the first electrode on the first insulating layer and the orthographic projection of each second sub-electrode outside the second region in the second electrode on the first insulating layer.

6. The touch module according to claim 5, wherein: The values ​​of N1, N2, M1 and M2 are all 4; in the first electrode, the first sub-electrode which is the jth in the first direction and the ith in the second direction is represented by A ij In the second electrode, the second sub-electrode which is the jth in the first direction and the ith in the second direction is represented by B ij ; The first region includes a first sub-region and a second sub-region. The first sub-region includes a first sub-electrode A 12 and A 22 The second sub-region includes a first sub-electrode A 33 and A 43 , the first sub-electrode in the first sub-region is connected to the adjacent first coil structure, and the first sub-electrode in the second sub-region is connected to the adjacent second coil structure; The second region includes a third sub-region and a fourth sub-region, and the third sub-region includes a second sub-electrode B 31 and B 32 The fourth sub-region includes the second sub-electrode B 23 and B 24 The second sub-electrode in the third sub-region is connected to the adjacent second coil structure, and the second sub-electrode in the fourth sub-region is connected to the adjacent second coil structure.

7. The touch module according to claim 1, wherein: In the second direction, the plurality of first electromagnetic coils form at least one first electromagnetic coil group, the first electromagnetic coil group includes at least two adjacent first electromagnetic coils, and the at least two adjacent first electromagnetic coils partially overlap to form a first overlapping area; In the first direction, the plurality of second electromagnetic coils form at least one second electromagnetic coil group, the second electromagnetic coil group includes at least two adjacent second electromagnetic coils, and the at least two adjacent second electromagnetic coils partially overlap to form a second overlapping area.

8. The touch module according to claim 7, wherein: The first insulating layer is provided with a first via hole in the first overlapping area, the first touch layer further includes a first connecting coil provided in the second overlapping area, and the second touch layer further includes a second connecting coil provided in the first overlapping area, and the partially overlapping first electromagnetic coils realize interlayer jumper through the first via hole and the first connecting coil; The first insulating layer is provided with a second via hole in the second overlapping area, and the partially overlapping second electromagnetic coil realizes an interlayer jumper through the second via hole and the first connecting coil.

9. The touch module according to claim 7, wherein: The first electromagnetic coil includes two first conductors parallel to each other and extending along a first direction, the two first conductors being connected to form a U-shaped structure, the opening directions of the first electromagnetic coils in the first electromagnetic coil group being the same, and the opening directions of the first electromagnetic coils in adjacent first electromagnetic coil groups being different; The second electromagnetic coil includes two second conductors parallel to each other and extending along the second direction. The two second conductors are connected to form a U-shaped structure. The opening directions of the second electromagnetic coils in the second electromagnetic coil group are the same, and the opening directions of the second electromagnetic coils in adjacent second electromagnetic coil groups are different.

10. The touch module according to claim 1, wherein: The touch module also includes: a touch detection circuit, which is connected to the capacitive sensing structure, the first electromagnetic induction structure, and the second electromagnetic induction structure, and is used to drive the capacitive sensing structure, the first electromagnetic induction structure, and the second electromagnetic induction structure in a preset order to perform touch detection.

11. A method for preparing a touch module, characterized in that: The following steps are involved: Prepare a first touch layer, the first touch layer comprising a plurality of first electrodes and a plurality of first electromagnetic coils, the plurality of first electrodes being arranged in an array along a first direction and a second direction, the plurality of first electromagnetic coils extending along the first direction and arranged in an array along the second direction, the first electrode comprising a plurality of first sub-electrodes arranged in an array, the first sub-electrodes within a first region of the first electrode being connected to the first electromagnetic coil, and the first sub-electrodes outside the first region of the first electrode being electrically connected; preparing a first insulating layer on the first touch layer; A second touch layer is prepared on the first insulating layer, the second touch layer comprising a plurality of second electrodes and a plurality of second electromagnetic coils, the plurality of second electrodes being arranged in an array along a first direction and a second direction, the plurality of second electromagnetic coils extending along the second direction and being arranged in an array along the first direction, the second electrode comprising a plurality of second sub-electrodes arranged in an array, the second sub-electrodes in a second region of the second electrode being connected to the second electromagnetic coils, the second sub-electrodes outside the second region of the second electrode being electrically connected, the orthographic projections of the first region and the second region on the first insulating layer not overlapping, and the orthographic projections of the first sub-electrodes outside the first region of the first electrode on the first insulating layer at least partially overlapping with the orthographic projections of the second sub-electrodes outside the second region of the second electrode on the first insulating layer; The first sub-electrode outside the first region of the first electrode and the second sub-electrode outside the second region of the second electrode form a capacitive sensing structure, the first sub-electrode within the first region of the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode within the second region of the second electrode and the second electromagnetic coil form a second electromagnetic induction structure.

12. A touch display device, characterized in that: The device comprises a display panel and a touch module according to any one of claims 1 to 10, wherein the touch module is arranged on the light-emitting side of the display panel.

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