Preparation method of touch module, touch module and touch display device

Abstract

The invention provides a preparation method of a touch module, the touch module and a touch display device. The touch module comprises a first touch layer, a first insulating layer and a second touch layer, the first touch layer comprises a plurality of first electrodes and first electromagnetic coils, the first electrodes are arranged in an array mode in the first direction and the second direction, the first electromagnetic coils extend in the first direction and are arranged in an array mode in the second direction, the second touch layer comprises second electrodes and second electromagnetic coils, and the second electrodes are arranged in an array mode in the first direction and the second direction. The second electromagnetic coils extend in the second direction and are arranged in an array mode in the first direction. The first electrode comprises a plurality of first sub-electrodes, the first sub-electrodes in a first area of the first electrode are connected with the first electromagnetic coil, the first sub-electrodes outside the first area are connected, the second electrode comprises a plurality of second sub-electrodes, and the second sub-electrodes in a second area of the second electrode are connected with the second electromagnetic coil. And the second sub-electrodes outside the second area are 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, stylus, as an important tool for interacting with touch screens, has attracted increasing attention from users for its diverse performance and functions. Traditionally, stylus pens are mainly divided into two categories: active stylus and passive stylus.

[0003] Among them, passive stylus pens have occupied a place in the entry-level market with their low price and convenience of no battery maintenance. However, passive stylus pens are difficult to achieve fine touch recognition, which directly affects the user's writing accuracy and interactive experience. Summary of the invention

[0004] The purpose of the present disclosure is 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 a passive stylus pen in the related art.

[0005] In order to achieve the above objectives, the present invention 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 comprises 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, the second touch layer comprises 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 comprises a plurality of first sub-electrodes arranged in an array, 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 comprises a plurality of second sub-electrodes arranged in an array, 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 overlapping area of ​​the projections is the area of ​​the orthographic projection of the first electrode or the second 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.

[0012] Optionally, the values ​​of N and M are both 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 ;

[0013] The first region includes a first sub-region and a second sub-region, and 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 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.

[0016] Optionally, the values ​​of N and M are both 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 ;

[0017] The first region includes a first sub-region and a second sub-region, and 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, and the partially overlapping second electromagnetic coil realizes an 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 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, the first electrode comprises a plurality of first sub-electrodes arranged in an array, the first sub-electrodes in a first area of ​​the first electrode are connected to the first electromagnetic coil, and the first sub-electrodes outside the first area of ​​the first electrode are electrically connected;

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

[0029] A second touch layer is prepared on the first insulating layer, the second touch layer comprises a plurality of second electrodes and a plurality of second electromagnetic coils, the plurality of second electrodes are arranged in an array along a first direction and a second direction, the plurality of second electromagnetic coils extend along the second direction and are arranged in an array along the first direction, the second electrode comprises a plurality of second sub-electrodes arranged in an array, a second sub-electrode in a second region of the second electrode is connected to the second electromagnetic coil, each second sub-electrode outside the second region of the second electrode is electrically connected, the orthographic projections of the first region and the second region on the first insulating layer do not overlap, and the orthographic projections of each first sub-electrode outside the first region of the first electrode on the first insulating layer at least partially overlap with the orthographic projections of each second sub-electrode outside the second region of the second electrode on the first insulating layer;

[0030] Among them, 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 in the first area of ​​the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode in the second area 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 a 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 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, the sub-electrodes inside each first electrode and each second electrode are designed to be arranged in a grid 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 sophisticated touch detection, and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The specific implementation methods of the present disclosure are 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 The schematic diagram of the film structure of the touch module shown;

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

[0043] Fig. 9 for Figure 8 An enlarged view of any first electrode;

[0044] Fig.10 is a schematic plan view of another embodiment of the second touch layer;

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

[0046] Fig.12 It is a structural schematic diagram of another embodiment of a touch module;

[0047] Fig.13 It is a structural schematic diagram of another embodiment of a touch module;

[0048] Fig.14 is a schematic diagram of a first electrode and a first wiring on a first touch layer;

[0049] Fig.15 is a schematic diagram of a second electrode and a second wiring on a second touch layer;

[0050] Fig.16 A timing diagram for the touch detection circuit to control the capacitive sensing structure, the first electromagnetic sensing structure and the second electromagnetic sensing structure to perform touch detection;

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

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

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

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the 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 terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can 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 described object 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] Among them, the active stylus, as a representative of the high-end market, brings users a richer and more natural writing and drawing experience with its excellent basic performance such as high precision and fast response, as well as the additional functions it provides (such as pen pressure sensing, hover function, integrated buttons, etc.). These functions not only improve work efficiency, but also greatly enhance the possibility of creative expression. However, the active stylus also faces significant technical challenges and market bottlenecks. On the one hand, its built-in battery needs to be charged regularly, which makes it unusable during charging, affecting the user's continuous use experience; on the other hand, the high cost and dependence on power supply limit its popularity among a wider user group, especially those who are price-sensitive or pursue a lightweight and unfettered experience.

[0058] In contrast, passive stylus pens have gained a place in the entry-level market with their low price and convenience of no battery maintenance. However, their technical limitations cannot be ignored - it is difficult to achieve fine touch recognition, which directly affects the user's writing accuracy and interactive experience.

[0059] In order to solve the technical problem of low touch recognition accuracy of passive stylus, the disclosed embodiment provides a dual touch solution combining EMR (Electromagnetic Resonance) touch and 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 driving electrodes and sensing electrodes. 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 of magnetic field. Therefore, the process is very sensitive and can capture tiny magnetic field changes, thereby achieving high-precision touch positioning. In the 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 preparation method of the touch module, the touch module and the touch display device disclosed in the present invention are described below in combination 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, Figure 2 for Figure 1 The schematic diagram of the membrane structure of the touch module 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 view of area C in the middle, 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 101a arranged in an array. The first sub-electrodes 101a in the first region of the first electrode 101 are connected to the first electromagnetic coil 102, and the first sub-electrodes 101a 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 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 region can also be understood as the region 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 region can also be understood as the region formed by each connected first sub-electrode outside the first region; the second region can be understood as the region 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 region can also be understood as the region formed by each connected second sub-electrode outside the second region.

[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 a 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 of the first sub-electrodes 101a, and the second region includes at least one of the second sub-electrodes 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 embodiment 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 may be 3, 4, 5, etc. For example, Figure 3 As shown, taking the case where the values ​​of M1, M2, N1 and N2 are all 4 as an example, the first electrode 101 includes 4*4 first sub-electrodes 101a, the second electrode 201 includes 4*4 second sub-electrodes 201a, and the positive 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, and 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 manner.

[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 capacitive touch area and the electromagnetic touch area in the touch module can be flexibly adjusted in the embodiment of the present disclosure, thereby flexibly adjusting the capacitive touch sensing capability and the 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 of the first sub-electrodes 101a, and the second region includes at least one of the second sub-electrodes 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 included 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, the more second sub-electrodes 201a included in the second region, the stronger the electromagnetic touch sensing capability.

[0076] The connection structure of the first sub-electrode 101a in the first region of the first electrode 101 and the first electromagnetic coil 102 can be referred to as 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 the two 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, and 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 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-electrode in the first sub-region C11 is connected to the adjacent first coil structure 102, and the first sub-electrode in the second sub-region C12 is 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 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 each first sub-electrode is 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 are connected to each other, 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 Figure 7 As shown in the red solid line frame, 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 can be 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 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, in the process of preparing the first touch layer 10, a first sub-region C11, a second sub-region C12 and a third region C3 are formed by a single patterning process; in the process of preparing the second touch layer 20, a third sub-region C21, a fourth sub-region C22 and a fourth region C4 are formed by a single patterning process.

[0083] In the disclosed embodiment, one-half of the first sub-electrode 101a in the first electrode 101 is connected to the first electromagnetic coil 102 on both sides of the first electrode 101, which is used for electromagnetic touch, and one-half of the first sub-electrode 101a is used for capacitive touch. This embodiment uses part of the structure of the first electrode 101 as electromagnetic touch, which can enhance the electromagnetic touch area, thereby improving the strength and coverage of the electromagnetic signal, so that the touch area covers a wider area, and the electromagnetic signal changes that can be detected are more diverse and fine, which helps to achieve fine recognition and improve the sensitivity and accuracy of touch.

[0084] In a possible implementation, the orthographic projection of the first region on the first insulating layer 30 is the same as the orthographic projection of the second region on the first insulating layer 30, and the orthographic projection area of ​​the first region on the first insulating layer 30 is smaller than the orthographic projection area of ​​the region outside the first region in the first electrode 101 on the first insulating layer 30. Further, the sum of the orthographic projection area Q of the first region on the first insulating layer 30 and the orthographic projection overlap area of ​​the first region is smaller than the orthographic projection area of ​​the region outside the first region in 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, Fig. 9 for Figure 8 An enlarged view of any first electrode in Fig.10 is a plan view of another embodiment of the second touch layer, Fig.11 for Fig.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 which 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 to 9 As shown, the first region is Fig. 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 a 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 Fig. 9 As shown, the third area C3 outside the first area is as shown in Fig. 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 each first sub-electrode is connected to each other.

[0087] like Figure 10 to Figure 11 As shown, the second region is Fig.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 are connected to each other, 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 Fig.11 As shown, the fourth area C4 outside the second area is as shown in Fig. 9 As shown in the green solid line frame, 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, four first sub-electrodes 101a in the first electrode 101 are connected to the first coil structure 102, and four second sub-electrodes 201a in the second electrode 201 are connected to the second coil structure 202, which is equivalent to about one quarter of the area of ​​the first electrode 101 or the second electrode 201 being used for electromagnetic touch control, and the remaining about three quarters of the area being used for capacitive touch control. 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, so that the capacitive touch area covers a wider area, which helps to achieve fine recognition and improve the sensitivity and accuracy of the capacitive touch.

[0089] It can be understood that, in the embodiment of the present disclosure, the first sub-electrodes 101a in the first sub-region C11 and the second sub-region C12 need to be connected to the first electromagnetic coils 102 adjacent to each other. Since the first electromagnetic coil 102 extends along the first direction, the first sub-region C11 can be set to 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 be set to 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 be set to 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 be set to include at least one second sub-electrode 201a adjacent to the second electromagnetic coil 202 in the first direction. With such arrangement, the connection between the first sub-electrode 101a and the first electromagnetic coil 102 in the first sub-region C11 and the second sub-region C12, and the connection between the second sub-electrode 201a and the second electromagnetic coil 202 in the third sub-region C21 and the fourth sub-region 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 embodiment of the present disclosure can be made of materials such as nickel, platinum, copper, selenium, cobalt, aluminum, copper, metal foil, conductive silver paste, etc. It can be 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 embodiment, the sub-electrodes in each region are connected, and in specific implementation, it can also be understood that they are integrally formed during the manufacturing process and are prepared once through the manufacturing process.

[0091] It is understandable that in the embodiment of the present disclosure, the first electrode 101 and the second electrode 201 are arranged in a grid structure in an array along the first direction and the second direction. On the one hand, the grid structure can be made of low-cost conductive materials such as copper, which has a higher cost-effectiveness than other materials. On the other hand, the design of the grid structure makes the manufacturing process of the touch electrode simpler and more efficient, which helps to reduce production costs and improve production efficiency. In addition, the grid structure makes the electrodes denser in a limited space, and can more finely capture changes in the touch position, thereby improving the sensitivity and accuracy of the touch; and compared with sparsely distributed electrodes, the grid structure reduces the blind area of ​​the touch area, making the touch operation smoother and more accurate.

[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 includes 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 grid structure. In addition, by setting each first sub-electrode in the first electrode to be a grid structure, and setting each second sub-electrode in the second electrode to be a grid structure, it is also convenient to use part of the first sub-electrodes as electromagnetic touch, and part 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, and by adjusting the arrangement and size of the sub-electrodes in the grid, the area and range of electromagnetic induction can also be accurately controlled to meet the needs of different application scenarios.

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

[0094] Optionally, the width of the first connection portion 104 and the second connection portion 204 is 5 to 30 micrometers. Figure 3 As shown, the width of the first connection portion 104 is recorded as W1, which represents the length of the first connection 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 a possible implementation, the first electromagnetic coil 102 includes two first conductors 1021 that are parallel to each other and extend along the first direction, and 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 the second direction, and the two second conductors 2021 are connected to form a U-shaped structure. Optionally, the orthographic projection of the first conductor 1021 on the first insulating layer 30 is located in a first gap formed by adjacent first electrodes 101 in the second direction when the first electrodes 101 are arranged in an array, and the orthographic projection of the second conductor 2021 on the first insulating layer 30 is located in a second gap formed by adjacent second electrodes 201 in the first direction when the second electrodes 201 are arranged in an array.

[0096] Among them, for the U-shaped first electromagnetic coil 102 and the 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. In this configuration, since the spacing between the two first conductors 1021 or the two second conductors 2021 is small, the loop area of ​​the first electromagnetic coil 102 and the second electromagnetic coil 202 will also be small, resulting in a larger resistance of the first electromagnetic coil 102 and the second electromagnetic coil 202, and more lead wires of 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, 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, 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 Fig.12 , Fig.12 is a structural diagram of another embodiment of a touch module, Fig.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 Fig.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. Fig.12 As shown in Fig.12 As shown, for any first electromagnetic coil group 102A, it includes two first electromagnetic coils 102, and the loop of each first electromagnetic coil 102 includes two rows of first electrodes 101, and the loops of the two first electromagnetic coils 102 have an overlapping area, and the overlapping area includes a row of first electrodes 101. Correspondingly, for any second electromagnetic coil group 202A, it includes two second electromagnetic coils 202, and the loop of each second electromagnetic coil 202 includes two columns of second electrodes 201, and the loops of the two second electromagnetic coils 202 have an overlapping area, and the overlapping area includes a column of second electrodes 201.

[0102] In the disclosed embodiment, adjacent electromagnetic coils in the first electromagnetic coil group or the second electromagnetic coil group are arranged to partially overlap. On the one hand, the partially overlapping arrangement can increase the number of turns of the electromagnetic coils, forming a denser magnetic field network, which helps to improve the accurate recognition of the touch point position. When the stylus is close to the touch module, the electromagnetic signal generated by it interacts with multiple overlapping electromagnetic coils. By comprehensively analyzing the signals sensed by multiple electromagnetic coils, more accurate coordinate information can be provided, effectively reducing positioning errors and improving the precision of touch recognition. On the other hand, the overlapping electromagnetic coils increase the surface area of ​​signal reception, thereby improving the sensitivity of signal reception, which helps to accurately identify touch operations even in weak signal environments, and improves the precision and stability of touch recognition. In addition, in application scenarios that require high-precision touch, such as drawing boards and handwriting input devices, the overlapping electromagnetic coils can provide more accurate pen positioning and a smooth writing experience, which helps users express their creativity and ideas more accurately and improve work efficiency and creative quality.

[0103] When the two first electromagnetic coils 102 in the first electromagnetic coil group 102A partially overlap, the routing of the two first electromagnetic coils 102 will cross. In order to avoid the crossing of the routing, the interlayer jumper technology is used at the crossing position. Similarly, when the two second electromagnetic coils 202 in the second electromagnetic coil group 202A partially overlap, the routing of the two second electromagnetic coils 202 will also cross. The interlayer jumper technology can also be used to avoid the crossing of the routing of the second electromagnetic coils 202. Interlayer jumpers are a commonly used technology in multi-layer PCB design, which is 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, Fig.12 As shown, the first insulating layer 30 is provided with a first via hole in the first overlapping area, the second touch layer 20 also includes a second connecting coil 205 arranged in the first overlapping area, and the partially overlapping first electromagnetic coil 102 realizes interlayer jumper through the first via hole and the second connecting coil 205; the first insulating layer 30 is provided with a second via hole in the second overlapping area, the first touch layer 10 also includes a first connecting coil 105 arranged in the second overlapping area, and the partially overlapping second electromagnetic coil 202 realizes interlayer jumper through the second via hole 302 and the first connecting coil 105.

[0105] In a 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 Fig.13 , Fig.13 A structural diagram of another embodiment of the touch module provided in the embodiment of the present disclosure, Fig.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 Fig.13 Not shown, such as Fig.13 As shown, the opening directions of the first electromagnetic coils 102 in the first electromagnetic coil group 102A are the same. Fig.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. Fig.13 In the Y direction, among the three first electromagnetic coil groups 102A from top to bottom, 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] Understandably, Fig.13 In the illustrated embodiment, the opening directions of the second electromagnetic coils 202 of adjacent second electromagnetic coil groups 202A are the same, while in other embodiments, the opening directions of the second electromagnetic coils 202 of adjacent second electromagnetic coil groups 202A may also be different.

[0108] In addition, in other embodiments, it may also be that: 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 group 102A is the left side, and the opening direction of the lower half of the first electromagnetic coil group 102A is the right side. 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 group 202A is the bottom side, and the opening direction of the right half of the second electromagnetic coil group 202A is the top side.

[0109] For the electromagnetic touch structure, when an electromagnetic pen, such as a conductive object such as a stylus or a finger, moves on the touch module, it will change the magnetic field distribution in the electromagnetic coil in the touch module, thereby generating an electrical signal. When the opening direction of the electromagnetic coil is both upward and downward, both left and right, a more complex magnetic field distribution can be formed, making the electromagnetic induction more sensitive, which helps to improve the touch module's ability to respond to tiny movements and make touch operations more precise.

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

[0111] For example, please refer to Figure 14 to Figure 15 , Fig.14 is a schematic diagram of a first electrode and a first wiring on a first touch layer, Fig.15 is a schematic diagram of the second electrode and the second wiring on the second touch layer, such as Figure 14 to Figure 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 are used as sensing electrodes and the second electrodes are used as driving electrodes, the first wiring 103 is used as a sensing line, and the second wiring 203 is used as a driving line. The first wiring 103 (for example, R1, R2, R3, R4, R5, R6, R7, R8, and R9 in the figure) is used to receive a sensing signal at the first sub-electrode 101a in the third area C3 of the first electrode 101, and the second wiring 203 (for example, T1, T2, T3, T4, T5, T6, T7, T8, and T9 in the figure) is used to send a driving signal to the second sub-electrode 201a in the fourth area C4 of the sensing electrode 202.

[0112] Understandably, Fig.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 , Fig.12 , Fig.13The embodiment shown, and Fig.14 The specific structure of the first electrode 101 and the first connecting portion 104 can be referred to Figure 3 to Figure 4 as well as Figures 8 to 9 The embodiment shown; Fig.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 , Fig.10 , Fig.12 , Fig.13 For details of the second electrode 201 and the second connecting portion 204, please refer to Figure 6 to Figure 7 as well as Figure 10 to Figure 11 The embodiment shown.

[0113] In a possible implementation, 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.

[0114] For example, please refer to Fig.16 , Fig.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 in FIG. Fig.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 working, the second wire T1 is used to transmit the driving signal, and the first wire R1 is used to transmit the sensing signal. Specifically, the touch detection circuit sends a driving signal of a specific frequency, and transmits the driving signal to the second electrode connected to the second wire T1 via the second wire T1. At the same time, the touch detection circuit receives the sensing signal at the first electrode connected to the first wire R1 via the first wire R1. The touch detection circuit can determine the position of the touch point by analyzing certain properties of the sensing signal, such as phase difference, time difference or frequency change.

[0116] When the first electromagnetic induction structure or the second electromagnetic induction structure is working, it includes a charging stage and a sensing stage. In the charging stage: the touch module sends a low-frequency electromagnetic signal to the electromagnetic pen to charge the circuit in the pen or activate its sensing mechanism. After the electromagnetic pen is activated, the electromagnetic pen will generate its own high-frequency signal based on the received energy; in the sensing stage: the touch module receives and analyzes the signal from the electromagnetic pen to determine the position of the electromagnetic pen and possible pressure or tilt information.

[0117] Understandably, Fig.16 The driving timing of a single capacitive sensing unit and a single electromagnetic induction unit is only schematically described, wherein a single capacitive sensing unit refers to a capacitive sensing structure formed by a first electrode and a second electrode, such as a 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 implementation, when the capacitive sensing structure is working, the touch detection circuit will simultaneously send a driving signal to each capacitive sensing unit in the touch module and receive a sensing signal; and when the first electromagnetic induction structure or the second electromagnetic induction structure is working, all the first electromagnetic coils in the first electromagnetic induction structure or all the second electromagnetic coils in the second electromagnetic induction structure are controlled to charge or sense.

[0118] Based on the same inventive concept, the second aspect of the present disclosure provides a touch display device, including 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. Specifically, the touch module includes a first touch layer, a first insulating layer, and a second touch layer stacked in sequence, and in one implementation, the first touch layer is arranged on a side close to the display panel, and in other implementations, the second touch layer may also be arranged on a side close to the display panel.

[0119] Optionally, an inorganic layer and a barrier layer may be provided between the display panel and the touch module. Fig.17 , Fig.17 is a schematic diagram of the structure of the touch display device according to an embodiment of the present disclosure, such as Fig.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 which are sequentially stacked in the light emitting direction of the display panel.

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

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

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

[0123] The display panel may be an organic light-emitting diode (OLED) display panel. It is understandable that the display panel may be set to 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 (Micro LED) 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, please refer to Fig.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 being 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 in a first area of ​​the first electrode being connected to the first electromagnetic coil, and the first sub-electrodes outside the first area of ​​the first electrode being electrically connected;

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

[0128] Step S30, preparing 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 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 the second region of the second electrode being connected to the second electromagnetic coil, 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] Among them, 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 in the first area of ​​the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode in the second area of ​​the second electrode and the second electromagnetic coil form a second electromagnetic induction structure.

[0130] Please refer to Fig.19 , Fig.19 The process flow chart for preparing a touch module on a display panel is as follows: Fig.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 limitations on the implementation methods of the present disclosure. For ordinary technicians in this field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present disclosure are still within the protection scope 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 which are stacked in sequence; The first touch layer comprises 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, the second touch layer comprises 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 comprises a plurality of first sub-electrodes arranged in an array, 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 comprises a plurality of second sub-electrodes arranged in an array, 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, characterized in that: 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.

3. The touch module according to claim 2, characterized in that: 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 overlapping area of ​​the projections is the area of ​​the orthographic projection of the first electrode or the second 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.

4. The touch module according to claim 3, characterized in that: 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, and 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, characterized in that: 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 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, characterized in that: 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, and 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, characterized in that: 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, characterized in that: 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 coil realizes an 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, the first touch layer further includes a first connecting coil provided 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, characterized in that: The first electromagnetic coil comprises two first conductors which 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; 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, characterized in that: 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.

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 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, the first electrode comprises a plurality of first sub-electrodes arranged in an array, the first sub-electrodes in a first area of ​​the first electrode are connected to the first electromagnetic coil, and the first sub-electrodes outside the first area of ​​the first electrode are electrically connected; preparing a first insulating layer on the first touch control layer; A second touch layer is prepared on the first insulating layer, the second touch layer comprises a plurality of second electrodes and a plurality of second electromagnetic coils, the plurality of second electrodes are arranged in an array along a first direction and a second direction, the plurality of second electromagnetic coils extend along the second direction and are arranged in an array along the first direction, the second electrode comprises a plurality of second sub-electrodes arranged in an array, a second sub-electrode in a second region of the second electrode is connected to the second electromagnetic coil, each second sub-electrode outside the second region of the second electrode is electrically connected, the orthographic projections of the first region and the second region on the first insulating layer do not overlap, and the orthographic projections of each first sub-electrode outside the first region of the first electrode on the first insulating layer at least partially overlap with the orthographic projections of each second sub-electrode outside the second region of the second electrode on the first insulating layer; Among them, 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 in the first area of ​​the first electrode and the first electromagnetic coil form a first electromagnetic induction structure, and the second sub-electrode in the second area of ​​the second electrode and the second electromagnetic coil form a second electromagnetic induction structure.

12. A touch display device, characterized in that: The invention comprises a display panel and a touch module as claimed in 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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