Touch module and touch display device

Abstract

The application discloses a touch module and a touch display device. The touch module comprises a touch panel, a touch driving chip and an electromagnetic induction chip. The touch panel comprises a substrate, a capacitive touch layer and an electromagnetic coil layer. The electromagnetic coil layer and the capacitive touch layer are sequentially stacked on the substrate and insulated from each other. The touch driving chip is electrically connected with the capacitive touch layer and is configured to sequentially output a touch driving signal and an electromagnetic excitation signal. The touch driving signal is used to drive the capacitive touch layer to generate an electric field to sense a finger touch. The electromagnetic excitation signal is used to drive the electromagnetic coil layer or the capacitive touch layer to generate a magnetic field to excite an electromagnetic pen to emit an electromagnetic signal. The electromagnetic induction chip is electrically connected with the electromagnetic coil layer and is configured to acquire an electromagnetic induction signal generated by the electromagnetic coil layer in response to the electromagnetic signal and determine the position of the electromagnetic pen.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to a touch module and a touch display device. Background Technology

[0002] With the development of display technology, touch technology has been increasingly applied to the interaction between users and display products. Touch technology allows users to directly touch or approach the display screen with their hands or other objects to input information or operation commands, thereby reducing or even eliminating users' reliance on input devices such as mice and keyboards, facilitating user operation, and improving user experience. According to their principles, touch technology includes capacitive touch technology and electromagnetic touch technology. Electromagnetic touch technology utilizes an object with a magnetic field (such as an electromagnetic pen) brought close to the display product. By changing the relative spatial position between the magnetic object and the display product, the electromagnetic induction coil within the display product generates a change in magnetic field, thus producing a weak current. Based on the changes in the induced current in two different directions, the corresponding touch point coordinates can be detected, and the touch position can be obtained. However, the implementation cost of electromagnetic touch technology is currently relatively high. Summary of the Invention

[0003] This application provides a touch module and a touch display device, which aims to at least partially solve the problem of high implementation cost of electromagnetic touch technology.

[0004] In a first aspect of this application, a touch module is provided, the touch module comprising: A touch panel includes a substrate, a capacitive touch layer, and an electromagnetic coil layer, wherein the electromagnetic coil layer and the capacitive touch layer are sequentially stacked on the substrate and are insulated from each other. A touch driver chip, electrically connected at least to the capacitive touch layer, is configured to sequentially output a touch driving signal and an electromagnetic excitation signal; the touch driving signal is used to drive the capacitive touch layer to generate an electric field to sense finger touch; the electromagnetic excitation signal is used to drive the electromagnetic coil layer or the capacitive touch layer to generate a magnetic field to excite the electromagnetic pen to emit electromagnetic signals. An electromagnetic induction chip, electrically connected to the electromagnetic coil layer, is configured to acquire the electromagnetic induction signal generated by the electromagnetic coil layer in response to the electromagnetic signal, and determine the position of the electromagnetic pen.

[0005] In some embodiments, the output signal of the touch driver chip includes a periodic signal, each period of which includes a capacitive touch phase, a capacitive sensing phase, an electromagnetic touch phase, and an electromagnetic sensing phase. The touch driver signal is the periodic signal of the capacitive touch phase, and the electromagnetic excitation signal is the periodic signal of the electromagnetic touch phase.

[0006] In some implementations, the electromagnetic induction chip is also electrically connected to the touch driver chip and is configured to establish timing synchronization with the touch driver chip.

[0007] In some embodiments, the capacitive touch layer includes: Multiple emitting electrodes are arranged in an array on the side of the electromagnetic coil layer away from the substrate; each of the emitting electrodes in the same row is connected in series, and one of the emitting electrodes is connected to the touch driver chip; Multiple receiving electrodes are arranged in an array on the side of the electromagnetic coil layer away from the substrate and are insulated from the transmitting electrodes; each of the receiving electrodes in the same column is connected in series and one of the receiving electrodes is connected to the touch driver chip; The touch driver chip is configured to sequentially output the touch driving signal to each row of the transmitting electrodes, drive each of the transmitting electrodes in the same row to generate the electric field, and acquire the capacitive sensing signal generated by each column of the receiving electrodes under the action of the electric field to determine the position of the finger touch.

[0008] In some embodiments, when the electromagnetic excitation signal is used to drive the capacitive touch layer to generate a magnetic field, the capacitive touch layer further includes: A control circuit, connected in series between the transmitting electrode and the touch driver chip, is configured to sequentially output the touch driving signal to each row of transmitting electrodes during the capacitive touch phase, and to connect the transmitting electrodes into a coil during the electromagnetic touch phase, and output the electromagnetic excitation signal to the coil.

[0009] In some embodiments, the capacitive touch layer includes a plurality of emitter electrode combinations, each emitter electrode combination including two adjacent rows of emitter electrodes; the control circuit includes: Multiple switching circuits correspond one-to-one with the multiple emitter electrode combinations; the switching circuits are connected in series between one row of emitter electrodes in the corresponding emitter electrode combination and the touch driver chip; the switching circuits are configured to connect the emitter electrode to the touch driver signal input during the capacitive touch phase and to ground the connected emitter electrode during the electromagnetic touch phase. Multiple switching circuits correspond one-to-one with the multiple emitting electrode combinations; the switching circuits are connected in series between two rows of emitting electrodes in the corresponding emitting electrode combination; the switching circuits are configured to connect the two rows of emitting electrodes in the corresponding emitting electrode combination in series during the electromagnetic touch phase to form the coil.

[0010] In some embodiments, the substrate has a first side, a second side, a third side, and a fourth side that are connected end to end in sequence, and the plurality of emission electrodes are arranged at intervals in sequence along the direction from the first side to the third side to form 2*N emission electrode combinations, where N is a positive integer; The switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the second side, while the switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the fourth side; or, The switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the second side, while the switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the fourth side.

[0011] In some implementations... In the emitter electrode combinations from row 1 to row N, the emitter electrode in the row closest to the first side is connected to the switching circuit; in the emitter electrode combinations from row N+1 to row 2*N, the emitter electrode in the row closest to the third side is connected to the switching circuit; or, In the emitting electrode combinations from row 1 to row N, the emitting electrode in the row closest to the third side is connected to the switching circuit; in the emitting electrode combinations from row N+1 to row 2*N, the emitting electrode in the row closest to the first side is connected to the switching circuit.

[0012] In some implementations, when the electromagnetic excitation signal is used to drive the electromagnetic coil layer to generate a magnetic field, the touch driver chip is also electrically connected to the electromagnetic coil layer.

[0013] In a second aspect of this application, a touch display device is provided, the touch display device including a display panel and a touch module as provided in any embodiment of the first aspect.

[0014] According to one or more embodiments of this application, a touch module and a touch display device are provided. A touch driver chip sequentially outputs a touch driving signal and an electromagnetic excitation signal. The touch driving signal drives the capacitive touch layer to generate an electric field that senses finger touch. The electromagnetic excitation signal drives the electromagnetic coil layer or the capacitive touch layer to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals. Thus, the driving parts for both electromagnetic and capacitive touch are integrated into the touch driver chip. The electromagnetic induction chip only acquires the electromagnetic induction signal generated by the electromagnetic coil layer in response to the electromagnetic signal to determine the position of the electromagnetic pen. It does not need to drive the electromagnetic coil layer to generate a magnetic field. Therefore, the driving module in the electromagnetic induction chip can be reduced, lowering the implementation cost and size of the electromagnetic induction chip, meeting customer needs, and enhancing product competitiveness. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of a touch module in one or more embodiments of this application is shown.

[0017] Figure 2 A schematic diagram of the output signals of the touch driver chip is shown.

[0018] Figure 3 It shows Figure 1 A schematic diagram of the capacitive touch layer.

[0019] Figure 4 It shows Figure 3 The circuit state diagram of the capacitive touch layer during the capacitive touch stage.

[0020] Figure 5 It shows Figure 3 The circuit state diagram of the electromagnetic touch layer during the capacitive touch stage.

[0021] Figure 6 A schematic diagram of the structure of the touch module in another embodiment of this application is shown.

[0022] Figure 7 It shows Figure 6 A schematic diagram of the capacitive touch layer.

[0023] Figure 8 A schematic diagram of the structure of a touch display device in one or more embodiments of this application is shown.

[0024] Figure 9A schematic diagram of the structure of a touch system in one or more embodiments of this application is shown.

[0025] Figure 10 A schematic diagram of the structure of an electronic device in one or more embodiments of this application is shown.

[0026] Figure 11 A flowchart illustrating an electromagnetic touch method in one or more embodiments of this application is shown.

[0027] Explanation of reference numerals in the attached drawings: 10-Touch panel, 11-Substrate, 12-Capacitive touch layer, 120-Emitting electrode assembly, 121-Emitting electrode, 122-Receiving electrode, 123-Control circuit, 1231-Switching circuit, 1232-Switch circuit, 13-Electromagnetic coil layer, 131-First electromagnetic induction coil, 132-Second electromagnetic induction coil, 20-Touch driver chip, 30-Electromagnetic induction chip, 40-Display panel, 50-Electromagnetic pen, 60-Processor. Detailed Implementation

[0028] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] Figure 1 For a schematic diagram of the touch module in one or more embodiments of this application, please refer to [link / reference]. Figure 1 According to a first aspect of this application, a touch module is provided, which includes a touch panel 10, a touch driver chip 20 and an electromagnetic induction chip 30.

[0030] The touch panel 10 includes a substrate 11, a capacitive touch layer 12 and an electromagnetic coil layer 13, which are stacked sequentially on the substrate 10 and are insulated from each other.

[0031] The touch driver chip 20 is electrically connected to at least the capacitive touch layer 12 and is configured to sequentially output a touch drive signal and an electromagnetic excitation signal. The touch drive signal is used to drive the capacitive touch layer 12 to generate an electric field to sense finger touch. The electromagnetic excitation signal is used to drive the electromagnetic coil layer 13 or the capacitive touch layer 12 to generate a magnetic field to excite the electromagnetic pen to emit electromagnetic signals.

[0032] The electromagnetic induction chip 30 is electrically connected to the electromagnetic coil layer 13 and is configured to acquire the electromagnetic induction signal generated by the electromagnetic coil layer 13 in response to the electromagnetic signal, and determine the position of the electromagnetic pen.

[0033] In this embodiment, the capacitive touch operation process is as follows: The touch driver chip 20 outputs a touch driving signal to the capacitive touch layer 12. Driven by the touch driving signal, the capacitive touch layer 12 generates an electric field that senses finger touch and generates a capacitive sensing signal in response to the electric field. Because the electric field in the finger-touched area changes, the capacitive sensing signal differs from that in the non-touched area. Therefore, the touch driver chip 20 can determine the position of the finger touch based on the capacitive sensing signal.

[0034] The electromagnetic touch operation process is as follows: The touch driver chip 20 outputs an electromagnetic excitation signal to the electromagnetic coil layer 13 (or the capacitive touch layer 12). Driven by the electromagnetic excitation signal, the electromagnetic coil layer 13 (or the capacitive touch layer 12) generates a magnetic field that excites the electromagnetic pen to emit electromagnetic signals. The electromagnetic pen emits electromagnetic signals under the excitation of the magnetic field. The electromagnetic coil layer 13 responds to the electromagnetic signal by generating an electromagnetic induction signal. Because the phase and amplitude of the electromagnetic signals received by different areas of the electromagnetic coil layer 13 are different, the electromagnetic induction chip 30 can determine the position of the electromagnetic pen based on the differences between the electromagnetic induction signals.

[0035] Furthermore, the pressure applied when writing or drawing with an electromagnetic pen is directly proportional to the tightness of contact between the pen and the screen. The tighter the contact, the smaller the distance between the pen and the screen; therefore, this distance can be used to measure the pressure applied during writing or drawing. Moreover, the distance between the pen and the screen affects the degree of electromagnetic field coupling, which in turn affects the electromagnetic induction signal. Therefore, by detecting changes in the electromagnetic induction signal when the pen contacts the screen, the pressure applied during writing or drawing can be indirectly calculated.

[0036] For example, the touch driver chip 20 can be electrically connected to the capacitive touch layer 12, and sequentially output touch driving signals and electromagnetic excitation signals to the capacitive touch layer 12. Alternatively, the touch driver chip 20 can be electrically connected to both the capacitive touch layer 12 and the electromagnetic coil layer 13, respectively, outputting touch driving signals to the capacitive touch layer 12 and electromagnetic excitation signals to the electromagnetic coil layer 13.

[0037] The aforementioned touch module includes a touch panel 10, a touch driver chip 20, and an electromagnetic induction chip 30. The touch panel 10 includes a substrate 11, a capacitive touch layer 12, and an electromagnetic coil layer 13. The electromagnetic coil layer 13 and the capacitive touch layer 12 are sequentially stacked on the substrate 10 and are insulated from each other, enabling electromagnetic touch and capacitive touch responses, respectively. The touch driver chip 20 is electrically connected to at least the capacitive touch layer 12 and sequentially outputs a touch drive signal and an electromagnetic excitation signal. The touch drive signal is used to drive the capacitive touch layer 12 to generate an electric field that senses finger touch, and the electromagnetic excitation signal is used to drive the electromagnetic coil layer 13 or the capacitive touch layer 12 to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals. Thus, both the electromagnetic touch driving part and the capacitive touch driving part are integrated into the touch driver chip. The electromagnetic induction chip 30 is electrically connected to the electromagnetic coil layer 13 and obtains the electromagnetic induction signal generated by the electromagnetic coil layer 13 in response to the electromagnetic signal to determine the position of the electromagnetic pen. It does not require driving the electromagnetic coil layer 13 to generate a magnetic field, which can reduce the driving module in the electromagnetic induction chip 30, reduce the implementation cost and size of the electromagnetic induction chip 30, meet customer needs, and enhance product competitiveness.

[0038] In some embodiments, the touch driver chip 20 and the electromagnetic induction chip 30 can be connected to the touch panel 10 via an FPC (Flexible Printed Circuit).

[0039] For example, the touch driver chip 20 can be connected to the capacitive touch layer 12 via FPC in a P2P (Peer-to-Peer) manner.

[0040] In some embodiments, please refer to Figure 1 The electromagnetic induction chip 30 can also be electrically connected to the touch driver chip 20 and configured to establish timing synchronization with the touch driver chip 20.

[0041] In this embodiment, the touch driver chip 20 outputs an electromagnetic excitation signal to the electromagnetic coil layer 13 (or the capacitive touch layer 12) to drive the electromagnetic coil layer 13 (or the capacitive touch layer 12) to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals. The electromagnetic induction chip 30 obtains the electromagnetic induction signal generated by the electromagnetic coil layer 13 in response to the electromagnetic signal to determine the position of the electromagnetic pen. The electromagnetic induction chip 30 is electrically connected to the touch driver chip 20 and a timing synchronization is established, which helps to accurately determine the position of the electromagnetic pen and improve the accuracy of electromagnetic touch.

[0042] For example, the electromagnetic induction chip 30 and the touch driver chip 20 can communicate through an interface such as SPI (Serial Peripheral Interface).

[0043] Figure 2 Please refer to the schematic diagram of the output signals of the touch driver chip. Figure 2 In some embodiments, the output signal of the touch driver chip 20 may include a periodic signal. Each period of the periodic signal includes a capacitive touch phase T1, a capacitive sensing phase T2, an electromagnetic touch phase T3, and an electromagnetic sensing phase T4. The touch driving signal is the periodic signal of the capacitive touch phase T1, and the electromagnetic excitation signal is the periodic signal of the electromagnetic touch phase T3.

[0044] For example, please refer to Figure 2 The touch driver chip 20 operates as follows in each cycle: First, in the capacitive touch phase T1, a touch driving signal is output to drive the capacitive touch layer 12 to generate an electric field that senses the touch of a finger. Then, in the capacitive sensing phase T2, a capacitive sensing signal is obtained from the capacitive touch layer 12 to determine the position of the finger touch; therefore, there is no output signal in the capacitive sensing phase T2. Next, in the electromagnetic touch phase T3, an electromagnetic excitation signal is output to excite the electromagnetic pen to emit an electromagnetic signal. Finally, there is no output signal in the electromagnetic induction phase T4, which allows the electromagnetic induction chip 30 to obtain the electromagnetic induction signal generated by the electromagnetic coil layer 13 in response to the electromagnetic signal, and to determine the position of the electromagnetic pen.

[0045] The following sections will describe two scenarios: one where the electromagnetic excitation signal drives the electromagnetic coil layer 13 to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals, and the other where the electromagnetic excitation signal drives the capacitive touch layer 12 to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals.

[0046] When the electromagnetic excitation signal drives the capacitive touch layer 12 to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals, the capacitive touch layer 12 needs to realize the function of capacitive touch on the one hand, and the function of excitation coil on the other hand.

[0047] Figure 3 for Figure 1 Please refer to the structural diagram of the capacitive touch layer. Figure 3 In some embodiments, the capacitive touch layer 12 may include a plurality of transmitting electrodes 121 and a plurality of receiving electrodes 122.

[0048] Multiple emitting electrodes 121 are arranged in an array on the side of the electromagnetic coil layer 13 away from the substrate 10. The emitting electrodes 121 in the same row are connected in series, and one emitting electrode 121 is connected to the touch driver chip 20.

[0049] Multiple receiving electrodes 122 are arranged in an array on the side of the electromagnetic coil layer 13 away from the substrate 10 and are insulated from the transmitting electrode 121. The receiving electrodes 122 in the same column are connected in series, and one receiving electrode 122 is connected to the touch driver chip 20.

[0050] Accordingly, the touch driver chip 20 is configured to sequentially output touch driving signals to each row of transmitting electrodes 121, drive each transmitting electrode 121 in the same row to generate an electric field, and acquire the capacitive sensing signals generated by each column of receiving electrodes 122 under the action of the electric field to determine the position of the finger touch.

[0051] In the above embodiments, the capacitive touch layer 12 may include a plurality of emitting electrodes 121 and a plurality of receiving electrodes 122 respectively arranged in an array on the side of the electromagnetic coil layer 13 away from the substrate 10. The emitting electrodes 121 in the same row are connected in series and one emitting electrode 121 is connected to the touch driver chip 20. The receiving electrodes 122 in the same column are connected in series and one receiving electrode 122 is connected to the touch driver chip 20. The touch driver chip 20 sequentially outputs touch driving signals to the emitting electrodes 121 in each row, drives the emitting electrodes 121 in the same row to generate an electric field, and acquires the capacitive sensing signals generated by the receiving electrodes 122 in each column under the action of the electric field to determine the position of the finger touch, thereby realizing the function of capacitive touch.

[0052] In one possible embodiment, please refer to Figure 3 The transmitting electrode 121 and the receiving electrode 122 can be arranged in the same layer, and one of the transmitting electrode 121 and the receiving electrode 122 can be connected through a connecting bridge between different layers, thereby achieving mutual insulation between the transmitting electrode 121 and the receiving electrode 122. In another possible embodiment, the transmitting electrode 121 and the receiving electrode 122 can also be arranged in different layers, and an insulating layer is provided between the transmitting electrode 121 and the receiving electrode 122, which can also achieve mutual insulation between the transmitting electrode 121 and the receiving electrode 122.

[0053] For example, please refer to Figure 3 Each row of emitting electrodes 121 can be arranged sequentially at intervals along a direction away from the touch driver chip 20. The emitting electrodes 121 located in the first or last column of each row are connected to the touch driver chip 20. By selecting the emitting electrodes 121 located at the edge of the emitting electrode array to connect to the touch driver chip 20, wiring can be facilitated.

[0054] For example, please refer to Figure 3 The first column of the emitter electrode 121 in one half of the rows of emitter electrodes 121 is connected to the touch driver chip 121, and the last column of the emitter electrode 121 in the other half of the rows of emitter electrodes 121 is connected to the touch driver chip 121. In this way, the connection lines between each row of emitter electrodes 121 and the touch driver chip 121 can be evenly distributed on both sides of the emitter electrode 121 array, which is beneficial to reduce the bezel.

[0055] For example, please refer to Figure 3Each row of receiving electrodes 122 can be arranged sequentially at intervals along one side of the touch driver chip 20, and the receiving electrode 122 closest to the touch driver chip 20 in each row is connected to the touch driver chip 121. By selecting the receiving electrode 122 closest to the touch driver chip 20 to connect to the touch driver chip 121, wiring can be facilitated.

[0056] In this embodiment, please refer to Figure 3 The capacitive touch layer 12 may also include a control circuit 123. The control circuit 123 is connected in series between the emitting electrode 121 and the touch driver chip 20, and is configured to output touch driving signals to each row of emitting electrodes 121 in sequence during the capacitive touch stage, and to connect the emitting electrodes 121 into a coil during the electromagnetic touch stage, and output electromagnetic excitation signals to the coil.

[0057] In the above embodiment, by connecting a control circuit 123 in series between the transmitting electrode 121 and the touch driver chip 20, the control circuit 123 sequentially outputs touch driving signals to each row of transmitting electrodes 121 during the capacitive touch stage, and connects the transmitting electrodes 121 into a coil during the electromagnetic touch stage, and outputs an electromagnetic excitation signal to the coil, so that the capacitive touch layer 12 can realize both the function of capacitive touch and the function of excitation coil.

[0058] Please see Figure 3 The capacitive touch layer 12 may include multiple emitter electrode combinations 120, each emitter electrode combination including two adjacent rows of emitter electrodes 121.

[0059] For example, the control circuit 123 may include a plurality of switching circuits 1231 and a plurality of switching circuits 1232.

[0060] Multiple switching circuits 1231 correspond one-to-one with multiple emitter electrode combinations 120. Each switching circuit 1231 is connected in series between a row of emitter electrodes 121 in the corresponding emitter electrode combination 120 and the touch driver chip 20. The switching circuit 1231 is configured to input the touch driving signal to the connected emitter electrode 121 during the capacitive touch phase and to ground the connected emitter electrode 121 during the electromagnetic touch phase.

[0061] Multiple switching circuits 1232 correspond one-to-one with multiple emitting electrode combinations 120. Each switching circuit 1232 is connected in series between two rows of emitting electrodes 121 in a corresponding emitting electrode combination 120. The switching circuit 1232 is configured to connect the two rows of emitting electrodes 121 in series during the electromagnetic touch phase to form a coil.

[0062] In the above embodiment, the multiple rows of emitting electrodes 121 are divided into multiple emitting electrode combinations 120. Each pair of adjacent rows of emitting electrodes 121 constitutes one emitting electrode combination 120. The control circuit 123 is configured with a switching circuit 1231 and a switching circuit 1232 for each emitting electrode combination 120. The switching circuit 1231 is connected in series between one row of emitting electrodes 121 in the corresponding emitting electrode combination 120 and the touch driver chip 20. During the capacitive touch stage, the touch driving signal is input to the connected emitting electrode 121, and during the electromagnetic touch stage, the connected emitting electrode 121 is grounded. The switching circuit 1232 is connected in series between two rows of emitting electrodes 121 in the corresponding emitting electrode combination 120. During the electromagnetic touch stage, the two rows of emitting electrodes 121 in the corresponding emitting electrode combination 120 are connected in series to form a coil. In this way, during the capacitive touch stage, each row of emitting electrodes 121 is independent of each other, and the switching circuit 1231 inputs the touch driving signal to the emitting electrode 121 of the corresponding row to realize the function of capacitive touch. During the electromagnetic touch control stage, the switching circuit 1232 connects two rows of transmitting electrodes 121 in the corresponding transmitting electrode combination 120 in series to form a coil, and the switching circuit 1231 grounds the corresponding connected transmitting electrodes 121. The electromagnetic excitation signal passes through each transmitting electrode 121 forming the coil in sequence to realize the function of exciting the coil.

[0063] In one possible embodiment, the substrate 10 may include a display area and a border area that at least partially surrounds the display area, and the switching circuit 1231 and the switching circuit 1232 may be located in the border area. In another possible embodiment, the substrate 10 may also include a bonding area connected to the border area, and the switching circuit 1231 and the switching circuit 1232 may also be bonded to a circuit board, such as an FPC or PCB (Printed Circuit Board), in the bonding area.

[0064] For example, please refer to Figure 3 The switching circuit 1231 may include a multiplexer switch. The first selection terminal of the multiplexer switch is connected to the touch driver chip 20, the second selection terminal of the multiplexer switch is grounded, and the fixed terminal of the multiplexer switch is connected to a row of emitter electrodes 121 in the corresponding emitter electrode assembly 120.

[0065] During the capacitive touch phase, the first selection terminal of the multiplexer is connected to the fixed terminal, thereby connecting a row of transmitting electrodes 121 connected to the multiplexer to the touch driver chip 20 to input touch driving signals to this row of transmitting electrodes 121. During the electromagnetic touch phase, the second selection terminal of the multiplexer is connected to the fixed terminal, thereby connecting a row of transmitting electrodes 121 connected to the multiplexer to ground to receive electromagnetic excitation signals from another row of transmitting electrodes 121 of the same transmitting electrode assembly 120.

[0066] Please see Figure 3 Each multiplexer's first selection terminal is connected to the touch driver chip 20. The second selection terminals of each multiplexer can be interconnected, and the control terminals of each multiplexer can also be interconnected, facilitating wiring. The control terminals of the multiplexers can be connected to the touch driver chip 20.

[0067] In one possible embodiment, the multiplexer switch can be an SPDT (Single Pole Double Throw) switch, a multiplexer, a relay, etc. In another possible embodiment, the multiplexer switch can also be a combination of a PIN (positive intrinsic negative) diode or a field-effect transistor, such as a MOSFET (metal-oxide-semiconductor field-effect transistor) or a GaAs FET (field-effect transistor).

[0068] For example, please refer to Figure 3 The switching circuit 1232 may include a field-effect transistor (FET). The gate of the FET is connected to the touch driver chip 20, the source of the FET is connected to one row of emitter electrodes 121 in the corresponding emitter electrode combination 120, and the drain of the FET is connected to another row of emitter electrodes 121 in the corresponding emitter electrode combination 120.

[0069] In the capacitive touch stage, the gate of the field-effect transistor (FET) controls the source and drain of the FET to be disconnected. The two rows of emitter electrodes 121 in the same emitter electrode assembly 120 are independent of each other and receive touch drive signals to generate an electric field that senses finger touch. In the electromagnetic touch stage, the gate of the FET controls the source and drain of the FET to be connected. The two rows of emitter electrodes 121 in the same emitter electrode assembly 120 are connected to form a coil, which generates a magnetic field that excites the electromagnetic pen to emit electromagnetic signals under the drive of an electromagnetic excitation signal.

[0070] Please see Figure 3 The gates of each field-effect transistor can be interconnected, facilitating wiring. The gates of the field-effect transistors can also be interconnected with the control terminals of the multiplexer, which is beneficial for synchronous control and also facilitates wiring.

[0071] In one possible embodiment, the field-effect transistor can be an NMOS (Negative channel Metal Oxide Semiconductor) transistor. In another possible embodiment, the field-effect transistor can also be a PMOS (Positive channel Metal Oxide Semiconductor) transistor.

[0072] Figure 4 for Figure 3 Please refer to the circuit state diagram of the capacitive touch layer during the capacitive touch phase. Figure 4 During the capacitive touch stage, the gate of the field-effect transistor controls the source and drain of the field-effect transistor to disconnect. The two rows of emitter electrodes 121 in the same emitter electrode combination 120 are independent of each other. At the same time, the first selection terminal of the multiplexer is connected to the fixed terminal, so that the row of emitter electrodes 121 connected by the multiplexer is connected to the touch driver chip 20. In this way, the two rows of emitter electrodes 121 in the same emitter electrode combination 120 are independent of each other and can receive touch drive signals to generate an electric field that senses finger touch.

[0073] Figure 5 for Figure 3 Please refer to the circuit state diagram of the capacitive touch layer during the electromagnetic touch phase. Figure 5 During the electromagnetic touch stage, the gate of the field-effect transistor controls the source and drain of the field-effect transistor to connect. The two rows of emitter electrodes 121 in the same emitter electrode assembly 120 are connected to form a coil. At the same time, the second selection terminal of the multiplexer is connected to the fixed terminal, so that the row of emitter electrodes 121 connected to the multiplexer is connected to ground. In this way, the electromagnetic excitation signal is input from the row of emitter electrodes 121 in the same emitter electrode assembly 120 to the other row of emitter electrodes 121, thereby generating a magnetic field that excites the electromagnetic pen to emit electromagnetic signals.

[0074] For example, please refer to Figure 3 One emitter electrode 121 connected to the source of the field-effect transistor is the first emitter electrode, and one emitter electrode 121 connected to the drain of the field-effect transistor is the second emitter electrode. The first emitter electrode and the second emitter electrode in the same emitter electrode combination 120 can be located on the same side of the array of emitter electrodes 121, which facilitates wiring.

[0075] For example, please refer to Figure 3 The switching circuit 1231 and the switch circuit 1232 corresponding to the same emitter electrode combination 120 can be located on opposite sides of the array of emitter electrodes 121, which facilitates wiring and helps to reduce the bezel.

[0076] The substrate 10 may have a first side, a second side, a third side and a fourth side connected end to end in sequence, and a plurality of emission electrodes 121 are arranged in sequence at intervals along the direction from the first side to the third side to form 2*N emission electrode combinations 120, where N is a positive integer.

[0077] In one possible embodiment, please refer to Figure 3 The switching circuit 1231 corresponding to the 1st to Nth transmitting electrode combinations 120 and the switching circuit 1232 corresponding to the (N+1)th to 2*Nth transmitting electrode combinations 120 are located on the second side, while the switching circuit 1232 corresponding to the 1st to Nth transmitting electrode combinations 120 and the switching circuit 1231 corresponding to the (N+1)th to 2*Nth transmitting electrode combinations 120 are located on the fourth side. This ensures that the current direction of different coils remains consistent at the same time, preventing differences in the magnetic induction direction of different coils.

[0078] For example, please refer to Figure 3 In the first to Nth rows of transmitting electrode combinations 120, the row of transmitting electrodes 121 closest to the first side is connected to the switching circuit 1231. In the (N+1)th to 2*Nth rows of transmitting electrode combinations 120, the row of transmitting electrodes 121 closest to the third side is connected to the switching circuit 1231. This ensures that the current direction of different coils remains consistent at the same time, preventing differences in the magnetic induction direction of different coils.

[0079] For example, in the 1st to Nth row of transmitting electrode combinations 120, the row of transmitting electrodes 121 closest to the third side is connected to the switching circuit 1231. In the N+1th to 2*Nth row of transmitting electrode combinations 120, the row of transmitting electrodes 121 closest to the first side is connected to the switching circuit 1231. In this way, the current direction of different coils can be kept consistent at the same time, which can prevent differences in the magnetic induction direction of different coils.

[0080] In another possible embodiment, the switching circuit 1232 corresponding to the 1st to Nth emitter electrode combinations 120 and the switching circuit 1231 corresponding to the (N+1)th to 2*Nth emitter electrode combinations 120 are located on the second side, and the switching circuit 1231 corresponding to the 1st to Nth emitter electrode combinations 120 and the switching circuit 1232 corresponding to the (N+1)th to 2*Nth emitter electrode combinations 120 are located on the fourth side.

[0081] For example, in the first to Nth rows of the emitter electrode assembly 120, the row of emitter electrodes 121 closest to the first side is connected to the switching circuit 1231. In the N+1th to 2*Nth rows of the emitter electrode assembly 120, the row of emitter electrodes 121 closest to the third side is connected to the switching circuit 1231. In this way, the current direction of different coils can be kept consistent at the same time, which can prevent differences in the magnetic induction direction of different coils.

[0082] For example, in the 1st to Nth row of transmitting electrode combinations 120, the row of transmitting electrodes 121 closest to the third side is connected to the switching circuit 1231. In the N+1th to 2*Nth row of transmitting electrode combinations 120, the row of transmitting electrodes 121 closest to the first side is connected to the switching circuit 1231. In this way, the current direction of different coils can be kept consistent at the same time, which can prevent differences in the magnetic induction direction of different coils.

[0083] In the two possible embodiments described above, the wiring of the switching circuit 1231 is more complex than that of the switching circuit 1232. By evenly distributing the connections between each row of transmitting electrodes 121 and the touch driver chip 20 on both sides of the transmitting electrode 121 array, it is beneficial to reduce the bezel.

[0084] When the electromagnetic excitation signal drives the electromagnetic coil layer 13 to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals, the capacitive touch layer 12 only needs to implement the capacitive touch function, while the electromagnetic coil layer 13 implements the coil function.

[0085] Figure 6 For a schematic diagram of the touch module in another embodiment of this application, please refer to [link / reference]. Figure 6 The touch driver chip 20 can also be electrically connected to the electromagnetic coil layer 13. Through the electrical connection between the touch driver chip 20 and the electromagnetic coil layer 13, the touch driver chip 20 outputs an electromagnetic excitation signal to the electromagnetic coil layer 13 to drive the electromagnetic coil layer 13 to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals.

[0086] Figure 7 for Figure 6 Please refer to the structural diagram of the capacitive touch layer. Figure 7 In some embodiments, the capacitive touch layer 12 may include a plurality of transmitting electrodes 121 and a plurality of receiving electrodes 122.

[0087] Multiple emitting electrodes 121 are arranged in an array on the side of the electromagnetic coil layer 13 away from the substrate 10. The emitting electrodes 121 in the same row are connected in series, and one emitting electrode 121 is connected to the touch driver chip 20.

[0088] Multiple receiving electrodes 122 are arranged in an array on the side of the electromagnetic coil layer 13 away from the substrate 10 and are insulated from the transmitting electrode 121. The receiving electrodes 122 in the same column are connected in series, and one receiving electrode 122 is connected to the touch driver chip 20.

[0089] Accordingly, the touch driver chip 20 is configured to sequentially output touch driving signals to each row of transmitting electrodes 121, drive each transmitting electrode 121 in the same row to generate an electric field, and acquire the capacitive sensing signals generated by each column of receiving electrodes 122 under the action of the electric field to determine the position of the finger touch.

[0090] In the above embodiments, the capacitive touch layer 12 may include a plurality of emitting electrodes 121 and a plurality of receiving electrodes 122 respectively arranged in an array on the side of the electromagnetic coil layer 13 away from the substrate 10. The emitting electrodes 121 in the same row are connected in series and one emitting electrode 121 is connected to the touch driver chip 20. The receiving electrodes 122 in the same column are connected in series and one receiving electrode 122 is connected to the touch driver chip 20. The touch driver chip 20 sequentially outputs touch driving signals to the emitting electrodes 121 in each row, drives the emitting electrodes 121 in the same row to generate an electric field, and acquires the capacitive sensing signals generated by the receiving electrodes 122 in each column under the action of the electric field to determine the position of the finger touch, thereby realizing the function of capacitive touch.

[0091] In one possible embodiment, please refer to Figure 7 The transmitting electrode 121 and the receiving electrode 122 can be arranged in the same layer, and one of the transmitting electrode 121 and the receiving electrode 122 can be connected through a connecting bridge between different layers, thereby achieving mutual insulation between the transmitting electrode 121 and the receiving electrode 122. In another possible embodiment, the transmitting electrode 121 and the receiving electrode 122 can also be arranged in different layers, and an insulating layer is provided between the transmitting electrode 121 and the receiving electrode 122, which can also achieve mutual insulation between the transmitting electrode 121 and the receiving electrode 122.

[0092] For example, please refer to Figure 7 Each row of emitting electrodes 121 can be arranged sequentially at intervals along a direction away from the touch driver chip 20. The emitting electrodes 121 located in the first or last column of each row are connected to the touch driver chip 20. By selecting the emitting electrodes 121 located at the edge of the emitting electrode array to connect to the touch driver chip 20, wiring can be facilitated.

[0093] For example, please refer to Figure 7The first column of the emitter electrode 121 in one half of the rows of emitter electrodes 121 is connected to the touch driver chip 121, and the last column of the emitter electrode 121 in the other half of the rows of emitter electrodes 121 is connected to the touch driver chip 121. In this way, the connection lines between each row of emitter electrodes 121 and the touch driver chip 121 can be evenly distributed on both sides of the emitter electrode 121 array, which is beneficial to reduce the bezel.

[0094] For example, please refer to Figure 7 Each row of receiving electrodes 122 can be arranged sequentially at intervals along one side of the touch driver chip 20, and the receiving electrode 122 closest to the touch driver chip 20 in each row is connected to the touch driver chip 121. By selecting the receiving electrode 122 closest to the touch driver chip 20 to connect to the touch driver chip 121, wiring can be facilitated.

[0095] In some embodiments, the electromagnetic coil layer 13 may include a plurality of first electromagnetic induction coils 131 and a plurality of second electromagnetic induction coils 132.

[0096] Multiple first electromagnetic induction coils 131 are arranged at intervals along a first direction on one side of the substrate 10. The first electromagnetic induction coils 131 extend along a second direction, which intersects with the first direction.

[0097] A plurality of second electromagnetic induction coils 132 are arranged at intervals along a second direction on one side of the substrate 10 and are insulated from the first electromagnetic induction coil 131. The second electromagnetic induction coils 132 extend along a first direction.

[0098] In the above embodiments, by separately setting the electromagnetic coil layer 13 to generate an electromagnetic induction signal in response to the electromagnetic signal, the requirements of the passive electromagnetic pen for the extremely high impedance and number of turns of the coil can be met.

[0099] For example, when the electromagnetic excitation signal drives the electromagnetic coil layer 13 to generate a magnetic field that excites the electromagnetic pen to emit electromagnetic signals, at least one of the first electromagnetic induction coil 131 and the second electromagnetic induction coil 132 generates a magnetic field that excites the electromagnetic pen to emit electromagnetic signals under the drive of the electromagnetic excitation signal.

[0100] Figure 8 For a schematic diagram of the structure of the touch display device in one or more embodiments of this application, please refer to [link / reference]. Figure 8 According to a second aspect of this application, a touch display device is provided, which may include a display panel 40 and a touch module as provided in any embodiment of the first aspect.

[0101] In some embodiments, the display panel 40 and the touch module can be integrated as one unit or can be independent of each other.

[0102] For example, please refer to Figure 8 The display panel 40 can be located between the capacitive touch layer 12 and the electromagnetic coil layer 13.

[0103] For example, the display panel can be an OLED (Organic Light-Emitting Diode) display panel, an LCD (Liquid Crystal Display) display panel, or a Mini LED (Mini Light-Emitting Diode) display panel.

[0104] In some embodiments, the touch display device may further include a display chip. The display chip is connected to the display panel 40 and configured to control the content display of the display panel 40.

[0105] For example, a display chip may include timing control circuitry and display driver circuitry.

[0106] Figure 9 For a schematic diagram of the touch system in one or more embodiments of this application, please refer to [link / reference]. Figure 9 According to a third aspect of this application, a touch system is provided, which includes an electromagnetic pen 50 and a touch display device as provided in any embodiment of the second aspect.

[0107] In this embodiment, the electromagnetic pen 50 is a passive electromagnetic pen, that is, the electromagnetic pen 50 does not contain a power source, does not require charging or battery replacement, is more convenient to use, and has lower latency and higher positioning accuracy.

[0108] Exemplarily, the electromagnetic pen 50 may include a coil and a resonant circuit connected to the coil. The touch driver chip 20 in the touch display device can drive an array of excitation coils (electromagnetic coil layer 13 or capacitive touch layer 12) to generate a high-frequency AC electromagnetic field covering the entire touch area. When the electromagnetic pen 50 enters this external magnetic field, the coil in the electromagnetic pen 50 generates an induced current. This induced current causes resonance in the resonant circuit, forming an electromagnetic field that emits an electromagnetic signal.

[0109] Figure 10 For a schematic diagram of the electronic device in one or more embodiments of this application, please refer to [link / reference]. Figure 10 According to a fourth aspect of this application, an electronic device is provided, which includes a processor 60 and a touch display device as provided in any embodiment of the second aspect, wherein the touch display device is connected to the processor 60.

[0110] In this embodiment, the processor can combine the screen position (the position of the finger touch or the position of the electromagnetic pen) determined by the touch module and the display content of the display panel to determine the user operation (such as drawing, erasing, etc.), and control the display panel to change the display content according to the user operation.

[0111] Figure 11 For a flowchart illustrating the electromagnetic touch method in one or more embodiments of this application, please refer to [link / reference]. Figure 11 According to a fifth aspect embodiment of this application, an electromagnetic touch method is provided, which may include the following steps S101 to S106.

[0112] In step S101, the touch driver chip drives the capacitive touch layer (or electromagnetic coil layer) to generate a magnetic field.

[0113] In this embodiment, the electromagnetic pen is a passive electromagnetic pen, which requires a magnetic field provided by the touch module to excite the electromagnetic pen to emit electromagnetic signals.

[0114] For example, before the touch driver chip's capacitive touch layer generates a magnetic field, the method may further include the following step S100: the touch driver chip controls the switching circuit to connect two adjacent rows of emitting electrodes in series to form a coil, and controls the switching circuit to switch one end of one row of emitting electrodes connected to the touch driver chip to ground.

[0115] In step S102, the electromagnetic pen emits electromagnetic signals under the excitation of a magnetic field.

[0116] For example, step S102 may include the following steps: the coil in the electromagnetic pen generates an induced current under the excitation of a magnetic field; the resonant circuit in the electromagnetic pen resonates under the action of the induced current, and forms an electromagnetic field through the coil in the electromagnetic pen to emit an electromagnetic signal.

[0117] Step S103: The electromagnetic coil layer generates an electromagnetic induction signal in response to the electromagnetic signal.

[0118] In step S104, the electromagnetic induction chip determines the position and pressure of the electromagnetic pen based on the electromagnetic induction signal.

[0119] In practical applications, the phase and amplitude of the electromagnetic signals received by different regions of the electromagnetic coil layer are different, and the generated electromagnetic induction signals are also different. The electromagnetic induction chip can determine the position of the electromagnetic pen based on the differences between the electromagnetic induction signals.

[0120] Furthermore, the pressure applied when writing or drawing with an electromagnetic pen is directly proportional to the tightness of contact between the pen and the screen. The tighter the contact, the smaller the distance between the pen and the screen; therefore, this distance can be used to measure the pressure applied during writing or drawing. Moreover, the distance between the pen and the screen affects the degree of electromagnetic field coupling, which in turn affects the electromagnetic induction signal. Therefore, by detecting changes in the electromagnetic induction signal when the pen contacts the screen, the pressure applied during writing or drawing can be indirectly calculated.

[0121] In step S105, the processor obtains the display content of the display panel and, in conjunction with the position and pressure of the electromagnetic pen, determines the user operation.

[0122] In step S106, the processor controls the display panel to change the displayed content according to the user's operation.

[0123] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0124] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0125] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0126] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0127] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A touch module, characterized in that, The touch module includes: A touch panel includes a substrate, a capacitive touch layer, and an electromagnetic coil layer, wherein the electromagnetic coil layer and the capacitive touch layer are sequentially stacked on the substrate and are insulated from each other. A touch driver chip, electrically connected at least to the capacitive touch layer, is configured to sequentially output a touch driving signal and an electromagnetic excitation signal; the touch driving signal is used to drive the capacitive touch layer to generate an electric field to sense finger touch; the electromagnetic excitation signal is used to drive the capacitive touch layer to generate a magnetic field to excite the electromagnetic pen to emit electromagnetic signals. An electromagnetic induction chip, electrically connected to the electromagnetic coil layer, is configured to acquire the electromagnetic induction signal generated by the electromagnetic coil layer in response to the electromagnetic signal, and determine the position of the electromagnetic pen. The capacitive touch layer includes: Multiple emitting electrodes are arranged in an array on the side of the electromagnetic coil layer away from the substrate; each of the emitting electrodes in the same row is connected in series, and one of the emitting electrodes is connected to the touch driver chip; A control circuit, connected in series between the transmitting electrode and the touch driver chip, is configured to sequentially output the touch driving signal to each row of the transmitting electrode during the capacitive touch stage, and to connect the transmitting electrode into a coil during the electromagnetic touch stage, and output the electromagnetic excitation signal to the coil. The capacitive touch layer includes multiple emitter electrode combinations, each emitter electrode combination including two adjacent rows of emitter electrodes; the control circuit includes: Multiple switching circuits correspond one-to-one with the multiple emitter electrode combinations; the switching circuits are connected in series between one row of emitter electrodes in the corresponding emitter electrode combination and the touch driver chip; the switching circuits are configured to connect the emitter electrode to the touch driver signal input during the capacitive touch phase and to ground the connected emitter electrode during the electromagnetic touch phase. Multiple switching circuits correspond one-to-one with the multiple emitting electrode combinations; the switching circuits are connected in series between two rows of emitting electrodes in the corresponding emitting electrode combination; the switching circuits are configured to connect the two rows of emitting electrodes in the corresponding emitting electrode combination in series during the electromagnetic touch phase to form the coil.

2. The touch module according to claim 1, characterized in that, The output signal of the touch driver chip includes a periodic signal. Each period of the periodic signal includes a capacitive touch stage, a capacitive sensing stage, an electromagnetic touch stage, and an electromagnetic sensing stage. The touch driver signal is the periodic signal of the capacitive touch stage, and the electromagnetic excitation signal is the periodic signal of the electromagnetic touch stage.

3. The touch module according to claim 1 or 2, characterized in that, The electromagnetic induction chip is also electrically connected to the touch driver chip and is configured to establish timing synchronization with the touch driver chip.

4. The touch module according to claim 1 or 2, characterized in that, The capacitive touch layer also includes: Multiple receiving electrodes are arranged in an array on the side of the electromagnetic coil layer away from the substrate and are insulated from the transmitting electrodes; each of the receiving electrodes in the same column is connected in series and one of the receiving electrodes is connected to the touch driver chip; The touch driver chip is configured to sequentially output the touch driving signal to each row of the transmitting electrodes, drive each of the transmitting electrodes in the same row to generate the electric field, and acquire the capacitive sensing signal generated by each column of the receiving electrodes under the action of the electric field to determine the position of the finger touch.

5. The touch module according to claim 1, characterized in that, The substrate has a first side, a second side, a third side, and a fourth side that are connected end to end in sequence. The plurality of emission electrodes are arranged at intervals in sequence along the direction from the first side to the third side to form 2*N emission electrode combinations, where N is a positive integer. The switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the second side, while the switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the fourth side; or, The switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the second side, while the switching circuits corresponding to the 1st to Nth emitter electrode combinations and the switching circuits corresponding to the (N+1)th to 2*Nth emitter electrode combinations are located on the fourth side.

6. The touch module according to claim 5, characterized in that, In the emitter electrode combinations from row 1 to row N, the emitter electrode in the row closest to the first side is connected to the switching circuit; in the emitter electrode combinations from row N+1 to row 2*N, the emitter electrode in the row closest to the third side is connected to the switching circuit; or, In the emitting electrode combinations from row 1 to row N, the emitting electrode in the row closest to the third side is connected to the switching circuit; in the emitting electrode combinations from row N+1 to row 2*N, the emitting electrode in the row closest to the first side is connected to the switching circuit.

7. A touch display device, characterized in that, The touch display device includes a display panel and a touch module as described in any one of claims 1-6.

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