Touch module and touch display device

Abstract

The invention 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 capacitance touch layer and an electromagnetic coil layer, wherein the electromagnetic coil layer and the capacitance touch layer are sequentially stacked on the substrate and are insulated from each other. And the touch driving chip is at least 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 for driving the capacitive touch layer to generate an electric field so as to sense finger touch. The electromagnetic excitation signal is used for driving the electromagnetic coil layer or the capacitive touch layer to generate a magnetic field so as to excite an electromagnetic pen to emit an electromagnetic signal. And the electromagnetic induction chip is electrically connected with the electromagnetic coil layer and is configured to obtain 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] The present application belongs to the field of display technology, and specifically relates to a touch module and a touch display device. Background Art

[0002] With the development of display technology, touch technology has been increasingly used in the interaction process between users and display products. Touch technology means that users can directly touch or approach the display screen with their hands or other objects to input information or operating instructions, thereby reducing or even eliminating the user's dependence on input devices such as the mouse and keyboard, facilitating user operations, and improving user experience. According to the principle classification, touch technology includes capacitive touch technology, electromagnetic touch technology, etc. Among them, electromagnetic touch technology uses an object with a magnetic field (such as an electromagnetic pen) to approach the display product. By changing the relative spatial position between the object with a magnetic field and the display product, the electromagnetic induction coil in the display product can generate a magnetic field change, thereby generating a weak current. According to the changes in the induced current in two different directions, the corresponding touch point coordinates can be detected to obtain the touch position. However, the current implementation cost of electromagnetic touch technology is relatively high. Summary of the Invention

[0003] The present application provides a touch module and a touch display device, which aim to at least to some extent solve the problem of high implementation cost of electromagnetic touch technology.

[0004] In a first aspect of the present application, a touch module is provided, comprising: A touch panel comprises a base 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 base substrate and insulated from each other; a touch driver chip electrically connected to at least the capacitive touch layer and configured to sequentially output a touch driver signal and an electromagnetic excitation signal; the touch driver 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 stimulate the electromagnetic pen to emit an electromagnetic signal; The electromagnetic induction chip is electrically connected to the electromagnetic coil layer and is configured to obtain an electromagnetic induction signal generated by the electromagnetic coil layer in response to the electromagnetic signal, so as to determine the position of the electromagnetic pen.

[0005] In some embodiments, the output signal of the touch driving 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 induction stage, the touch driving signal is the periodic signal of the capacitive touch stage, and the electromagnetic excitation signal is the periodic signal of the electromagnetic touch stage.

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

[0007] In some embodiments, the capacitive touch layer includes: A plurality of emitting electrodes are distributed in an array on a side of the electromagnetic coil layer away from the base substrate; the emitting electrodes in the same row are connected in series, and one of the emitting electrodes is connected to the touch driver chip; A plurality of receiving electrodes are distributed in an array on a side of the electromagnetic coil layer away from the base substrate and are insulated from the transmitting electrode; the receiving electrodes in the same column are connected in series, and one receiving electrode is connected to the touch driver chip; The touch driver chip is configured to output the touch drive signal to each row of the transmitting electrodes in sequence, drive each of the transmitting electrodes in the same row to generate the electric field, and obtain the capacitance 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: The control circuit is connected in series between the emitting electrodes and the touch driver chip, and is configured to output the touch drive signal to each row of the emitting electrodes in sequence during the capacitive touch stage, and to connect the emitting electrodes into a coil and output the electromagnetic excitation signal to the coil during the electromagnetic touch stage.

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

[0010] In some embodiments, the substrate has a first side, a second side, a third side, and a fourth side connected end to end, and the plurality of emitting electrodes are sequentially spaced apart in a direction from the first side to the third side to form 2*N emitting electrode combinations, where N is a positive integer; The switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the second side, and the switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the fourth side; or The switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the second side, and the switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the fourth side.

[0011] In some embodiments, In the emitting electrode combinations from row 1 to row N, the emitting electrodes in a row close to the first side are connected to the switching circuit; in the emitting electrode combinations from row N+1 to row 2*N, the emitting electrodes in a row close to the third side are connected to the switching circuit; or In the emitting electrode combinations from row 1 to row N, a row of emitting electrodes close to the third side is connected to the switching circuit; in the emitting electrode combinations from row N+1 to row 2*N, a row of emitting electrodes close to the first side is connected to the switching circuit.

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

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

[0014] According to one or more embodiments of the present application, the touch module and touch display device provide a touch drive signal and an electromagnetic excitation signal, which are sequentially output by a touch driver chip. The touch drive signal is used to drive the capacitive touch layer to generate an electric field that senses finger touch, and the electromagnetic excitation signal is used to drive the electromagnetic coil layer or the capacitive touch layer to generate a magnetic field that stimulates the electromagnetic pen to emit an electromagnetic signal. In this way, both the electromagnetic touch drive and the capacitive touch drive are integrated into the touch driver chip. The electromagnetic induction chip only receives the electromagnetic induction signal generated by the electromagnetic coil layer in response to the electromagnetic signal to determine the position of the electromagnetic pen, without having to drive the electromagnetic coil layer to generate a magnetic field. This reduces the number of driver modules in the electromagnetic induction chip, reduces the cost and size of the electromagnetic induction chip, meets customer needs, and enhances product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0017] Figure 2 A schematic diagram showing the output signal of the touch driver chip.

[0018] Figure 3 Shown Figure 1 Schematic diagram of the structure of the capacitive touch layer.

[0019] Figure 4 Shown Figure 3 Circuit state diagram of the capacitive touch layer in the capacitive touch stage.

[0020] Figure 5 Shown Figure 3 Circuit state diagram of the electromagnetic touch layer during the capacitive touch stage.

[0021] Figure 6 FIG2 shows a structural diagram of a touch module in another embodiment of the present application.

[0022] Figure 7 Shown Figure 6 Schematic diagram of the structure of the capacitive touch layer.

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

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

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

[0026] Figure 11 A schematic flow chart of an electromagnetic touch method in one or more embodiments of the present application is shown.

[0027] Explanation of the accompanying drawings: 10-touch panel, 11-base substrate, 12-capacitive touch layer, 120-transmitting electrode combination, 121-transmitting electrode, 122-receiving electrode, 123-control circuit, 1231-switching circuit, 1232-switching 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 DESCRIPTION

[0028] In order to enable those skilled in the art to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0029] Figure 1 For a structural diagram of the touch module in one or more embodiments of the present application, please refer to Figure 1 In a first embodiment of the present application, a touch module is provided. The touch module includes a touch panel 10 , a touch driving chip 20 and an electromagnetic induction chip 30 .

[0030] The touch panel 10 includes a base 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 base substrate 10 and 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 drives the capacitive touch layer 12 to generate an electric field to sense a finger touch. The electromagnetic excitation signal drives the electromagnetic coil layer 13 or the capacitive touch layer 12 to generate a magnetic field to stimulate the electromagnetic pen to emit an electromagnetic signal.

[0032] The electromagnetic induction chip 30 is electrically connected to the electromagnetic coil layer 13 and is configured to obtain an 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, capacitive touch operates as follows: the touch driver chip 20 outputs a touch drive signal to the capacitive touch layer 12. Driven by the touch drive signal, the capacitive touch layer 12 generates an electric field that senses a finger's touch and, in response to this electric field, generates a capacitive sensing signal. Because the electric field in the area touched by the finger changes, the capacitive sensing signal differs from that in the untouched area. Therefore, the touch driver chip 20 can determine the finger's touch location based on the capacitive sensing signal.

[0034] The electromagnetic touch process works 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 stimulates the electromagnetic pen to emit an electromagnetic signal. The electromagnetic pen emits the electromagnetic signal under the stimulation of the magnetic field. In response to the electromagnetic signal, the electromagnetic coil layer 13 generates an electromagnetic induction signal. Because the electromagnetic signals received by different areas of the electromagnetic coil layer 13 have different parameters such as phase and amplitude, 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 positively correlated with 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, the distance between the pen and the screen can be used to measure the pressure applied when writing or drawing with the pen. Furthermore, 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 when writing or drawing can be indirectly inferred.

[0036] For example, the touch driver chip 20 can be electrically connected to the capacitive touch layer 12, and sequentially output a touch drive signal and an electromagnetic excitation signal to the capacitive touch layer 12. The touch driver chip 20 can also be electrically connected to the capacitive touch layer 12 and the electromagnetic coil layer 13, respectively, to output a touch drive signal to the capacitive touch layer 12 and an electromagnetic excitation signal to the electromagnetic coil layer 13.

[0037] The touch module includes a touch panel 10, a touch driver chip 20, and an electromagnetic induction chip 30. The touch panel 10 includes a base 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 base substrate 10 and insulated from each other, respectively enabling electromagnetic touch and capacitive touch responses. 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 an electromagnetic signal. In this way, the electromagnetic touch drive portion and the capacitive touch drive portion are both 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. There is no need to drive 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 driving chip 20 and the electromagnetic induction chip 30 may be connected to the touch panel 10 via an FPC (Flexible Printed Circuit).

[0039] Exemplarily, the touch driving chip 20 may be connected to the capacitive touch layer 12 through an FPC in a P2P (Peer-to-Peer, Point-to-Point) manner.

[0040] In some embodiments, see 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 an electromagnetic signal. 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 establishes timing synchronization, which is conducive to accurately determining the position of the electromagnetic pen and improving the accuracy of electromagnetic touch.

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

[0043] Figure 2 For a schematic diagram of the output signal of the touch driver chip, please refer to 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 stage T1, a capacitive sensing stage T2, an electromagnetic touch stage T3 and an electromagnetic induction stage T4, the touch driver signal is a periodic signal of the capacitive touch stage T1, and the electromagnetic excitation signal is a periodic signal of the electromagnetic touch stage T3.

[0044] For example, see Figure 2 The touch driver chip 20 operates as follows in each cycle: First, in the capacitive touch phase T1, it outputs a touch drive signal to drive the capacitive touch layer 12 to generate an electric field that senses finger touch. Then, in the capacitive sensing phase T2, it obtains a capacitive sensing signal from the capacitive touch layer 12 to determine the location of the finger touch. Therefore, no signal is output in the capacitive sensing phase T2. Then, in the electromagnetic touch phase T3, it outputs an electromagnetic excitation signal to stimulate the electromagnetic pen to emit an electromagnetic signal. Finally, in the electromagnetic sensing phase T4, it also does not output a signal, which helps the electromagnetic sensing chip 30 obtain the electromagnetic induction signal generated by the electromagnetic coil layer 13 in response to the electromagnetic signal and determine the location of the electromagnetic pen.

[0045] The following describes two cases respectively: 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 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 an electromagnetic signal, the capacitive touch layer 12 needs to realize the function of capacitive touch on the one hand, and the function of the excitation coil on the other hand.

[0047] Figure 3 for Figure 1 For a schematic diagram of the capacitive touch layer structure, please refer to 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] The plurality of emitting electrodes 121 are distributed in an array on a side of the electromagnetic coil layer 13 away from the base substrate 10 . The emitting electrodes 121 in the same row are connected in series, and one emitting electrode 121 is connected to the touch control driver chip 20 .

[0049] The receiving electrodes 122 are distributed in an array on a side of the electromagnetic coil layer 13 away from the base substrate 10 and are insulated from the transmitting electrodes 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 output touch drive signals to each row of transmitting electrodes 121 in sequence, drive each transmitting electrode 121 in the same row to generate an electric field, and obtain the capacitive sensing signal 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 embodiment, the capacitive touch layer 12 may include a plurality of transmitting electrodes 121 and a plurality of receiving electrodes 122 respectively distributed in an array on the side of the electromagnetic coil layer 13 away from the base substrate 10. The transmitting electrodes 121 in the same row are connected in series, and one transmitting 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 outputs touch drive signals to the transmitting electrodes 121 in each row in turn, drives the transmitting electrodes 121 in the same row to generate an electric field, and obtains the capacitive sensing signals generated by the receiving electrodes 122 in each column under the action of the electric field, determines the position of the finger touch, and can realize the capacitive touch function.

[0052] In one possible embodiment, see Figure 3 The transmitting electrode 121 and the receiving electrode 122 may be arranged in the same layer, and one of the transmitting electrode 121 and the receiving electrode 122 may be connected via a connecting bridge on a different layer, 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 may also be arranged in different layers, and an insulating layer may be provided between the transmitting electrode 121 and the receiving electrode 122, thereby also achieving mutual insulation between the transmitting electrode 121 and the receiving electrode 122.

[0053] For example, see Figure 3 The rows of emitter electrodes 121 can be arranged in a sequentially spaced order in a direction away from the touch driver chip 20, and the emitter electrodes 121 in the first or last column of the rows of emitter electrodes 121 are connected to the touch driver chip 121. By selecting emitter electrodes 121 and the touch driver chip 20 at the edge of the array of emitter electrodes 121, wiring can be facilitated.

[0054] For example, see Figure 3 In the half rows of emitting electrodes 121, the emitting electrodes 121 located in the first column are connected to the touch driver chip 121, and in the other half rows of emitting electrodes 121, the emitting electrodes 121 located in the last column are connected to the touch driver chip 121. In this way, the connection lines between the emitting electrodes 121 in each row and the touch driver chip 121 can be evenly distributed on both sides of the emitting electrode 121 array, which is conducive to reducing the frame.

[0055] For example, see Figure 3The columns of receiving electrodes 122 can be sequentially spaced apart along one side of the touch driver chip 20, and the receiving electrodes 122 closest to the touch driver chip 20 in the columns of receiving electrodes 122 are connected to the touch driver chip 121. By selecting the receiving electrodes 122 closest to the touch driver chip 20 for connection to the touch driver chip 121, wiring can be facilitated.

[0056] In this example, see Figure 3 The capacitive touch layer 12 may further include a control circuit 123. The control circuit 123 is connected in series between the emitting electrodes 121 and the touch driver chip 20. The control circuit 123 is configured to sequentially output a touch drive signal to each row of emitting electrodes 121 during the capacitive touch phase, and to connect the emitting electrodes 121 into a coil and output an electromagnetic excitation signal to the coil during the electromagnetic touch phase.

[0057] In the above embodiment, by connecting the control circuit 123 in series between the emitting electrode 121 and the touch driver chip 20, the control circuit 123 outputs a touch drive signal to each row of emitting electrodes 121 in sequence during the capacitive touch stage, and connects the emitting 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 exciting the coil.

[0058] See also Figure 3 The capacitive touch layer 12 may include a plurality of emitting electrode assemblies 120 , and each emitting electrode assembly includes two adjacent rows of emitting electrodes 121 .

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

[0060] Multiple switching circuits 1231 correspond one-to-one to multiple transmitting electrode assemblies 120. The switching circuits 1231 are connected in series between a row of transmitting electrodes 121 in a corresponding transmitting electrode assembly 120 and the touch driver chip 20. The switching circuits 1231 are configured to input touch drive signals to the connected transmitting electrodes 121 during the capacitive touch phase and to ground the connected transmitting electrodes 121 during the electromagnetic touch phase.

[0061] Multiple switching circuits 1232 correspond one-to-one to multiple transmitting electrode assemblies 120. The switching circuits 1232 are connected in series between two rows of transmitting electrodes 121 in a corresponding transmitting electrode assembly 120. The switching circuits 1232 are configured to connect the two rows of transmitting electrodes 121 in a corresponding transmitting electrode assembly 120 in series during the electromagnetic touch phase to form a coil.

[0062] In the above embodiment, multiple rows of emitting electrodes 121 are divided into multiple emitting electrode groups 120, with each two adjacent rows of emitting electrodes 121 forming a emitting electrode group 120. The control circuit 123 configures a switching circuit 1231 and a switch circuit 1232 for each emitting electrode group 120. The switching circuit 1231 is connected in series between a row of emitting electrodes 121 in the corresponding emitting electrode group 120 and the touch driver chip 20, and inputs a touch drive signal to the connected emitting electrodes 121 during the capacitive touch phase and grounds the connected emitting electrodes 121 during the electromagnetic touch phase. The switch circuit 1232 is connected in series between two rows of emitting electrodes 121 in the corresponding emitting electrode group 120, and connects the two rows of emitting electrodes 121 in the corresponding emitting electrode group 120 in series during the electromagnetic touch phase to form a coil. Thus, during the capacitive touch phase, each row of emitting electrodes 121 is independent of each other, and the switching circuit 1231 inputs a touch drive signal to the corresponding row of emitting electrodes 121, thereby implementing the capacitive touch function. During the electromagnetic touch stage, the switching circuit 1232 connects the 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 turn to realize the function of exciting the coil.

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

[0064] For example, see Figure 3 The switching circuit 1231 may include a multi-way selection switch, a first selection end of the multi-way selection switch is connected to the touch driver chip 20, a second selection end of the multi-way selection switch is grounded, and a fixed end of the multi-way selection switch is connected to a row of emitting electrodes 121 in the corresponding emitting electrode combination 120.

[0065] During the capacitive touch stage, the first selection terminal of the multi-way selection switch is connected to the fixed terminal, so that the row of emitting electrodes 121 connected to the multi-way selection switch is connected to the touch driver chip 20, thereby inputting the touch drive signal to this row of emitting electrodes 121. During the electromagnetic touch stage, the second selection terminal of the multi-way selection switch is connected to the fixed terminal, so that the row of emitting electrodes 121 connected to the multi-way selection switch is connected to the ground, thereby receiving the electromagnetic excitation signal from another row of emitting electrodes 121 in the same emitting electrode combination 120.

[0066] See also Figure 3 The first selection terminals of each multi-way selection switch are respectively connected to the touch driver chip 20, the second selection terminals of each multi-way selection switch can be connected to each other, and the control terminals of each multi-way selection switch can also be connected to each other, which can facilitate wiring. The control terminals of the multi-way selection switches can be connected to the touch driver chip 20.

[0067] In one possible embodiment, the multi-way selector switch may be an SPDT (Single Pole Double Throw) switch, a multiplexer, a relay, etc. In another possible embodiment, the multi-way selector switch may 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, see Figure 3 The switching circuit 1232 may include a field effect transistor, a gate of the field effect transistor being connected to the touch driver chip 20 , a source of the field effect transistor being connected to a row of emitter electrodes 121 in the corresponding emitter electrode combination 120 , and a drain of the field effect transistor being connected to another row of emitter electrodes 121 in the corresponding emitter electrode combination 120 .

[0069] During the capacitive touch phase, the gate of the FET disconnects the source and drain of the FET. The two rows of emitter electrodes 121 in the same emitter electrode assembly 120 are independent of each other and each receives a touch drive signal to generate an electric field that senses a finger's touch. During the electromagnetic touch phase, the gate of the FET connects the source and drain of the FET. The two rows of emitter electrodes 121 in the same emitter electrode assembly 120 form a coil, which, driven by the electromagnetic excitation signal, generates a magnetic field that excites the electromagnetic pen to emit an electromagnetic signal.

[0070] See also Figure 3 The gates of the FETs can be connected to each other, which facilitates wiring. The gates of the FETs and the control terminals of the multiplexer switches can be connected to each other, which facilitates synchronous control and wiring.

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

[0072] Figure 4 for Figure 3 For a circuit diagram of the capacitive touch layer in the capacitive touch stage, please refer to Figure 4 In the capacitive touch stage, the gate of the field-effect transistor controls the source of the field-effect transistor to be disconnected from the drain of the field-effect transistor. The two rows of emitting electrodes 121 in the same emitting electrode combination 120 are independent of each other. At the same time, the first selection end of the multi-way selection switch is connected to the fixed end, so that the row of emitting electrodes 121 connected by the multi-way selection switch is connected to the touch driver chip 20. In this way, the two rows of emitting electrodes 121 in the same emitting electrode combination 120 are independent of each other and can respectively receive touch drive signals to generate electric fields to sense finger touch.

[0073] Figure 5 for Figure 3 For a circuit diagram of the capacitive touch layer in the electromagnetic touch stage, please refer to Figure 5 During the electromagnetic touch stage, the gate of the field-effect transistor controls the connection between the source and drain of the field-effect transistor. The two rows of emitting electrodes 121 in the same emitting electrode combination 120 are connected to form a coil. At the same time, the second selection end of the multi-way selection switch is connected to the fixed end, so that the row of emitting electrodes 121 connected by the multi-way selection switch is connected to the ground. In this way, the electromagnetic excitation signal is input from one row of emitting electrodes 121 in the same emitting electrode combination 120 to another row of emitting electrodes 121, thereby generating a magnetic field that excites the electromagnetic pen to emit an electromagnetic signal.

[0074] For example, see Figure 3 An emitter electrode 121 connected to the source of the field effect transistor is a first emitter electrode, and an emitter electrode 121 connected to the drain of the field effect transistor is a 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 the emitter electrodes 121, which can facilitate routing.

[0075] For example, see Figure 3 The switching circuit 1231 and the switch circuit 1232 corresponding to the same transmitting electrode combination 120 can be located on opposite sides of the array of the transmitting electrode 121, which can facilitate wiring and help reduce the frame.

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

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

[0078] For example, see Figure 3 In the 1st to Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the first side is connected to the switching circuit 1231. In the N+1th to 2*Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the third side is connected to the switching circuit 1231. This allows the current directions of different coils to remain consistent at the same time, preventing differences in the magnetic induction directions of different coils.

[0079] For example, in the 1st to Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the third side is connected to the switching circuit 1231. In the N+1th to 2*Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the first side is connected to the switching circuit 1231. This allows the current directions of different coils to remain consistent at the same time, preventing differences in the magnetic induction directions of different coils.

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

[0081] For example, in the 1st to Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the first side is connected to the switching circuit 1231. In the N+1th to 2*Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the third side is connected to the switching circuit 1231. This allows the current directions of different coils to remain consistent at the same time, preventing differences in the magnetic induction directions of different coils.

[0082] For example, in the 1st to Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the third side is connected to the switching circuit 1231. In the N+1th to 2*Nth rows of transmitting electrode combinations 120, a row of transmitting electrodes 121 close to the first side is connected to the switching circuit 1231. This allows the current directions of different coils to remain consistent at the same time, preventing differences in the magnetic induction directions of different coils.

[0083] In the above two possible embodiments, the routing of the switching circuit 1231 is more complex than that of the switch circuit 1232 . Evenly distributing the connections between the rows of emitting electrodes 121 and the touch driver chip 20 on both sides of the emitting electrode 121 array helps to reduce the frame.

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

[0085] Figure 6 For a structural diagram of a touch module in another embodiment of the present application, please refer to 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 an electromagnetic signal.

[0086] Figure 7 for Figure 6 For a schematic diagram of the capacitive touch layer structure, please refer to 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] The plurality of emitting electrodes 121 are distributed in an array on a side of the electromagnetic coil layer 13 away from the base substrate 10 . The emitting electrodes 121 in the same row are connected in series, and one emitting electrode 121 is connected to the touch control driver chip 20 .

[0088] The receiving electrodes 122 are distributed in an array on a side of the electromagnetic coil layer 13 away from the base substrate 10 and are insulated from the transmitting electrodes 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 output touch drive signals to each row of transmitting electrodes 121 in sequence, drive each transmitting electrode 121 in the same row to generate an electric field, and obtain the capacitive sensing signal 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 embodiment, the capacitive touch layer 12 may include a plurality of transmitting electrodes 121 and a plurality of receiving electrodes 122 respectively distributed in an array on the side of the electromagnetic coil layer 13 away from the base substrate 10. The transmitting electrodes 121 in the same row are connected in series, and one transmitting 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 outputs touch drive signals to the transmitting electrodes 121 in each row in turn, drives the transmitting electrodes 121 in the same row to generate an electric field, and obtains the capacitive sensing signals generated by the receiving electrodes 122 in each column under the action of the electric field, determines the position of the finger touch, and can realize the capacitive touch function.

[0091] In one possible embodiment, see Figure 7 The transmitting electrode 121 and the receiving electrode 122 may be arranged in the same layer, and one of the transmitting electrode 121 and the receiving electrode 122 may be connected via a connecting bridge on a different layer, 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 may also be arranged in different layers, and an insulating layer may be provided between the transmitting electrode 121 and the receiving electrode 122, thereby also achieving mutual insulation between the transmitting electrode 121 and the receiving electrode 122.

[0092] For example, see Figure 7 The rows of emitter electrodes 121 can be arranged in a sequentially spaced order in a direction away from the touch driver chip 20, and the emitter electrodes 121 in the first or last column of the rows of emitter electrodes 121 are connected to the touch driver chip 121. By selecting emitter electrodes 121 and the touch driver chip 20 at the edge of the array of emitter electrodes 121, wiring can be facilitated.

[0093] For example, see Figure 7In the half rows of emitting electrodes 121, the emitting electrodes 121 located in the first column are connected to the touch driver chip 121, and in the other half rows of emitting electrodes 121, the emitting electrodes 121 located in the last column are connected to the touch driver chip 121. In this way, the connection lines between the emitting electrodes 121 in each row and the touch driver chip 121 can be evenly distributed on both sides of the emitting electrode 121 array, which is conducive to reducing the frame.

[0094] For example, see Figure 7 The columns of receiving electrodes 122 can be sequentially spaced apart along one side of the touch driver chip 20, and the receiving electrodes 122 closest to the touch driver chip 20 in the columns of receiving electrodes 122 are connected to the touch driver chip 121. By selecting the receiving electrodes 122 closest to the touch driver chip 20 for connection 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] A plurality of first electromagnetic induction coils 131 are arranged at intervals along a first direction on one side of the base substrate 10. The first electromagnetic induction coils 131 extend along a second direction that intersects the first direction.

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

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

[0099] Exemplarily, when the electromagnetic excitation signal drives the electromagnetic coil layer 13 to generate a magnetic field that excites the electromagnetic pen to emit an electromagnetic signal, 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 an electromagnetic signal under the drive of the electromagnetic excitation signal.

[0100] Figure 8 For a structural diagram of a touch display device in one or more embodiments of the present application, please refer to Figure 8 According to a second embodiment of the present application, a touch display device is provided. The touch display device 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 may be integrated into one body or may be independent of each other.

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

[0103] Exemplarily, the display panel may be an OLED (Organic Light-Emitting Diode) display panel, an LCD (Liquid Crystal Display) display panel, or a Mini LED (Sub-millimeter Light-Emitting Diode) display panel.

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

[0105] Exemplarily, the display chip may include a timing control circuit and a display driving circuit.

[0106] Figure 9 For a structural diagram of a touch control system in one or more embodiments of the present application, please refer to Figure 9 According to a third embodiment of the present 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 and does not require charging or battery replacement. It is more convenient to use and has lower latency and higher positioning accuracy.

[0108] For example, 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 the excitation coil array (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. The induced current causes resonance in the resonant circuit, forming an electromagnetic field, thereby emitting an electromagnetic signal.

[0109] Figure 10 For a structural diagram of an electronic device in one or more embodiments of the present application, please refer to Figure 10 According to a fourth embodiment of the present application, an electronic device is provided, comprising 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 determine the user operation (such as drawing, erasing, etc.) by combining the screen position determined by the touch module (the position touched by the finger or the position of the electromagnetic pen) and the display content of the display panel, and control the display panel to change the display content according to the user operation.

[0111] Figure 11 For a flow chart of the electromagnetic touch method in one or more embodiments of the present application, please refer to Figure 11 In a fifth embodiment of the present application, an electromagnetic touch method is provided. The electromagnetic touch method may include the following steps S101 to S106.

[0112] In step S101 , the touch driving 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, and the touch module needs to provide a magnetic field to stimulate the electromagnetic pen to emit an electromagnetic signal.

[0114] Illustratively, before the capacitive touch layer of the touch driver chip 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 transmitting electrodes in series to form a coil, and controls the switching circuit to switch one end of one row of transmitting electrodes connected to the touch driver chip to ground.

[0115] In step S102 , the electromagnetic pen emits an electromagnetic signal under the stimulation of a magnetic field.

[0116] Exemplarily, step S102 may include the following steps: the coil in the electromagnetic pen generates an induced current under the excitation of the magnetic field; the resonant circuit in the electromagnetic pen causes resonance 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] Step S104: The electromagnetic induction chip determines the position and pressure of the electromagnetic pen according to the electromagnetic induction signal.

[0119] In actual applications, the phase and amplitude and other parameters of the electromagnetic signals received by different areas 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 positively correlated with 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, the distance between the pen and the screen can be used to measure the pressure applied when writing or drawing with the pen. Furthermore, 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 when writing or drawing can be indirectly inferred.

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

[0122] Step S106: The processor controls the display panel to change display content according to user operation.

[0123] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0124] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0125] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0126] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

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

Claims

1. A touch module, characterized in that: The touch module includes: A touch panel comprises a base 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 base substrate and insulated from each other; a touch driver chip electrically connected to at least the capacitive touch layer and configured to sequentially output a touch driver signal and an electromagnetic excitation signal; the touch driver 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 stimulate the electromagnetic pen to emit an electromagnetic signal; The electromagnetic induction chip is electrically connected to the electromagnetic coil layer and is configured to obtain an electromagnetic induction signal generated by the electromagnetic coil layer in response to the electromagnetic signal, so as to determine the position of the electromagnetic pen.

2. The touch module according to claim 1, wherein: The output signal of the touch driving 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 induction stage, the touch driving 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 control driving chip and is configured to establish timing synchronization with the touch control driving chip.

4. The touch module according to claim 1 or 2, characterized in that: The capacitive touch layer includes: A plurality of emitting electrodes are distributed in an array on a side of the electromagnetic coil layer away from the base substrate; the emitting electrodes in the same row are connected in series, and one of the emitting electrodes is connected to the touch driver chip; A plurality of receiving electrodes are distributed in an array on a side of the electromagnetic coil layer away from the base substrate and are insulated from the transmitting electrode; the receiving electrodes in the same column are connected in series, and one receiving electrode is connected to the touch driver chip; The touch driver chip is configured to output the touch drive signal to each row of the transmitting electrodes in sequence, drive each of the transmitting electrodes in the same row to generate the electric field, and obtain the capacitance 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 4, wherein: When the electromagnetic excitation signal is used to drive the capacitive touch layer to generate a magnetic field, the capacitive touch layer further includes: The control circuit is connected in series between the emitting electrodes and the touch driver chip, and is configured to output the touch drive signal to each row of the emitting electrodes in sequence during the capacitive touch stage, and to connect the emitting electrodes into a coil and output the electromagnetic excitation signal to the coil during the electromagnetic touch stage.

6. The touch module according to claim 5, wherein: The capacitive touch layer includes a plurality of emitting electrode combinations, each of which includes two adjacent rows of emitting electrodes; and the control circuit includes: a plurality of switching circuits corresponding one to each of the plurality of emitting electrode combinations; the switching circuits being connected in series between a row of emitting electrodes in a corresponding emitting electrode combination and the touch driver chip; the switching circuits being configured to input the touch drive signal to the connected emitting electrodes during the capacitive touch phase and to ground the connected emitting electrodes during the electromagnetic touch phase; Multiple switching circuits correspond one-to-one to the multiple transmitting electrode combinations; the switching circuits are connected in series between two rows of transmitting electrodes in the corresponding transmitting electrode combination; the switching circuits are configured to connect the two rows of transmitting electrodes in the corresponding transmitting electrode combination in series during the electromagnetic touch stage to form the coil.

7. The touch module according to claim 6, wherein: The substrate has a first side, a second side, a third side, and a fourth side connected end to end, and the plurality of emitting electrodes are sequentially spaced from the first side to the third side to form 2*N emitting electrode combinations, where N is a positive integer; The switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the second side, and the switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the fourth side; or The switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the second side, and the switching circuits corresponding to the 1st to Nth transmitting electrode combinations and the switching circuits corresponding to the N+1th to 2*Nth transmitting electrode combinations are located on the fourth side.

8. The touch module according to claim 7, wherein: In the emitting electrode combinations from row 1 to row N, the emitting electrodes in a row close to the first side are connected to the switching circuit; in the emitting electrode combinations from row N+1 to row 2*N, the emitting electrodes in a row close to the third side are connected to the switching circuit; or In the emitting electrode combinations from row 1 to row N, a row of emitting electrodes close to the third side is connected to the switching circuit; in the emitting electrode combinations from row N+1 to row 2*N, a row of emitting electrodes close to the first side is connected to the switching circuit.

9. The touch module according to claim 1 or 2, characterized in that: When the electromagnetic excitation signal is used to drive the electromagnetic coil layer to generate a magnetic field, the touch driving chip is also electrically connected to the electromagnetic coil layer.

10. A touch display device, characterized in that: The touch display device includes a display panel and a touch module according to any one of claims 1 to 9.

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