Electronic device

Abstract

The invention provides electronic equipment. The electronic equipment comprises a body; the touch module is arranged on the body, the touch module comprises a plurality of first transmitting electrodes and a plurality of receiving electrodes which are arranged in a crossed mode, and the touch module detects touch operation acting on the touch module through a first signal transmission path comprising the first transmitting electrodes and the receiving electrodes; the at least one second emission electrode is arranged on the body, the second emission electrode is in signal connection with a controller of the touch module, and the arrangement position of the second emission electrode is different from that of the first emission electrode; the touch module detects relative position information between the first operation body and the touch surface of the touch module through a second signal transmission path comprising a second transmitting electrode and a receiving electrode; the first signal transmission path and the second signal transmission path are different.

Description

Technical Field

[0001] This disclosure relates to the field of touch technology, and more specifically, to an electronic device. Background Technology

[0002] Capacitive touch technology, with its advantages such as high sensitivity and support for multi-touch, has been widely used in various electronic devices such as smartphones, tablets, and laptops. To meet users' needs for high-precision operations such as writing and drawing, many electronic devices also support input using a stylus.

[0003] However, because the tip of a stylus is typically very small, the coupling capacitance between it and the sensing electrode is extremely weak, resulting in a very low effective signal strength that the controller can receive. This weak signal is highly susceptible to electromagnetic interference from the external environment, which can severely interfere with or even completely drown out the pen signal. This often leads to inaccurate stylus detection in complex electromagnetic environments, impacting the user experience. Summary of the Invention

[0004] In view of this, the present disclosure provides an electronic device.

[0005] One aspect of this disclosure provides an electronic device, comprising: a body; a touch module disposed on the body, the touch module including a plurality of first transmitting electrodes and a plurality of receiving electrodes arranged in a cross pattern, the touch module detecting touch operations applied to the touch module through a first signal transmission path including the first transmitting electrodes and the receiving electrodes; at least one second transmitting electrode disposed on the body, the second transmitting electrode being signal-connected to a controller of the touch module, the second transmitting electrode being disposed at a different position than the first transmitting electrodes, the touch module detecting relative position information between a first operating body and the touch surface of the touch module through a second signal transmission path including the second transmitting electrode and the receiving electrodes; the first signal transmission path and the second signal transmission path are different.

[0006] According to embodiments of this disclosure, the controller transmits a first driving signal through a first transmitting electrode and a second driving signal through a second transmitting electrode, wherein the signal frequency of the second driving signal is greater than or equal to the signal frequency of the first driving signal; and / or, the controller transmits the first driving signal to the first transmitting electrode and the second driving signal to the second transmitting electrode in a time-division manner within the same cycle.

[0007] According to embodiments of this disclosure, the touch module is a touch display screen disposed on the body, the first operating body is a stylus, and the second transmitting electrode is an antenna electrode disposed on at least one edge of the touch display screen; the touch display screen detects the relative position information between the stylus and the touch surface of the touch display screen through a second signal transmission path composed of a controller, the antenna electrode, the human body, the stylus, and the receiving electrode; and / or, the touch display screen detects the touch operation of the stylus on the touch display screen through a first signal transmission path composed of a controller, the first transmitting electrode, the stylus, and the receiving electrode.

[0008] According to embodiments of this disclosure, the body includes a first body and a second body that are rotatably connected;

[0009] The touch module includes a touch display screen disposed on a first surface of a first body, and an input device disposed on a second surface of a second body. When the angle between the first body and the second body is 0 degrees, the first surface is directly opposite the second surface. A second transmitting electrode is disposed at the connection between the first body and the second body, or disposed on the second body; or, the touch module is a touch panel disposed on the second body, with the second transmitting electrode disposed at the periphery of the touch panel. The touch panel detects the relative position information between the touch surface of the touch panel and the touch pen through a second signal transmission path composed of a controller, the second transmitting electrode, the human body, the stylus, and the receiving electrode.

[0010] According to embodiments of this disclosure, the electronic device further includes at least one of the following: the impedance of the material used to fabricate the second transmitting electrode is less than that of the first transmitting electrode; the second transmitting electrode and the first transmitting electrode share the same transmitting channel on the controller, or the second transmitting electrode and the first transmitting electrode are respectively connected to different transmitting channels on the controller; the signal frequency of the second driving signal emitted by the second transmitting electrode is greater than 200kHz.

[0011] According to an embodiment of this disclosure, the controller demodulates the first coupling signal sampled by the receiving electrode to obtain a first sensing signal, and the controller demodulates the second coupling signal sampled by the receiving electrode to obtain a second sensing signal. The first coupling signal is generated by the change in the electric field formed by the first driving signal, and the second coupling signal is generated by the change in the electric field formed by the second driving signal. When the controller determines that the first operating body is close to the touch surface based on the second sensing signal, the electronic device executes a touch response corresponding to the first sensing signal.

[0012] According to embodiments of this disclosure, the touch module is a touch display screen disposed on the main body, and the first operating body is a stylus; the controller sends the touch coordinates of the stylus on the touch display screen determined based on the first sensing signal to the electronic device, so that the electronic device executes a touch response corresponding to the touch coordinates; or, the controller sends the touch coordinates of the stylus on the touch display screen determined based on the first sensing signal and the second sensing signal to the electronic device, so that the electronic device executes a touch response corresponding to the touch coordinates.

[0013] According to embodiments of this disclosure, the touch module is a touch display screen of an electronic device, and the electronic device includes a first mode and a second mode; in the first mode, the controller detects touch operations applied to the touch display screen through a first signal transmission path; in the second mode, the controller detects touch operations applied to the touch display screen through the first signal transmission path and the second signal transmission path.

[0014] According to embodiments of this disclosure, the electronic device can also detect noise interference in the surrounding environment and switch from a first mode to a second mode based on the noise interference.

[0015] According to embodiments of this disclosure, the controller can also control the signal frequency of the first drive signal and / or the second drive signal based on the attribute information of the first operating body that is communicatively connected to the electronic device; and / or, the controller can also adjust the signal frequency of the first drive signal and / or the second drive signal based on the noise interference of the surrounding spatial environment. Attached Figure Description

[0016] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 An electronic device diagram according to an embodiment of the present disclosure is illustrated schematically;

[0018] Figure 2 This schematically illustrates the operating timing diagram of an electronic device according to an embodiment of the present disclosure during a detection cycle;

[0019] Figure 3A A schematic diagram illustrating a physical model of a second signal transmission path in an electronic device according to an embodiment of the present disclosure is shown.

[0020] Figure 3B An equivalent circuit model diagram of a second signal transmission path according to an embodiment of the present disclosure is shown schematically;

[0021] Figure 3C This illustration schematically shows a common-mode noise coupling path diagram of an electronic device according to an embodiment of the present disclosure in a charging scenario;

[0022] Figure 4A This schematically illustrates another structural diagram of an electronic device according to an embodiment of the present disclosure;

[0023] Figure 4B This schematically illustrates another structural diagram of an electronic device according to an embodiment of the present disclosure;

[0024] Figure 5 A touch sensor stack according to an embodiment of the present disclosure is schematically illustrated; and

[0025] Figure 6 This schematically illustrates another structural diagram of an electronic device according to an embodiment of the present disclosure. Detailed Implementation

[0026] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0027] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0028] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0029] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0030] In the embodiments disclosed herein, the collection, updating, analysis, processing, use, transmission, provision, disclosure, and storage of data (e.g., including but not limited to user personal information) comply with relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures have been taken to prevent unauthorized access to user personal information data and to safeguard user personal information security, network security, and national security.

[0031] Figure 1 An electronic device diagram according to an embodiment of the present disclosure is illustrated schematically.

[0032] In embodiments of this disclosure, the electronic device can be a terminal device containing a human-computer interaction interface, such as a laptop computer, tablet computer, or portable display screen. Figure 1 As shown, the electronic device includes a body 100, a touch module 110 disposed on the body, and at least one second transmitting electrode 120 disposed on the body.

[0033] The touch module 110 includes a plurality of first transmitting electrodes 111 and a plurality of receiving electrodes 112 arranged in a cross pattern. The touch module 110 detects touch operations applied to it through a first signal transmission path including the first transmitting electrodes 111 and the receiving electrodes 112. Figure 1As shown, the touch module 110 includes an effective touch sensing area and a border area 113 surrounding the sensing area. Within the touch sensing area, several first transmitting electrodes 111 and several receiving electrodes 112 are arranged in a cross-shaped configuration. The first transmitting electrodes 111 and receiving electrodes 112 are typically made of conductive materials such as metal mesh or indium tin oxide (ITO). They are spatially insulated from each other and arranged in a matrix-like cross-shape to construct a full-screen touch sensing field. The physical process of the first signal transmission path is as follows: the TX generator inside the touch chip (Touch IC) generates a high-frequency AC signal with a fixed frequency. This signal is output through the IC's TX pin and transmitted to the first transmitting electrodes 111 via the transmitting channel (TX channel), causing the first transmitting electrodes 111 to acquire alternating charges and form a periodically changing electrostatic field. Because the first transmitting electrode 111 and the receiving electrode 112 are arranged in a cross pattern, the electric field penetrates the surface layer of the touch panel, forming a mutual capacitance between the first transmitting electrode 111 and the receiving electrode 112 (at this time, the receiving electrode 112 will generate induced charge due to electric field coupling, forming a weak "coupled current"). When the first operating object (such as the tip of a stylus) approaches or contacts the surface of the touch module 110, the first operating object, as a conductor, will shunt part of the TX electric field, causing a change in the total mutual capacitance at the intersection. After sensing the coupling signal of the TX electric field, the receiving electrode 112 converts the "capacitance change" into an "electrical signal change" to form a weak voltage signal, which is transmitted to the RX pin of the touch IC for analysis. Touch operations include contact operations such as clicking and sliding within the touch sensing area, as well as hovering movement operations within the sensing height range.

[0034] The second transmitting electrode 120 is connected to the controller signal of the touch module 110. The position of the second transmitting electrode is different from that of the first transmitting electrode. The touch module detects the relative position information between the first operating body and the touch surface of the touch module through a second signal transmission path including the second transmitting electrode and the receiving electrode. Specifically, the second transmitting electrode 120 is an independent conductive unit disposed in a non-display area or non-touch sensing area of ​​the electronic device. Figure 1 As shown, the second transmitting electrode 120 is arranged within the frame area 113 of the touch module 110. The second transmitting electrode 120 is physically isolated from the first transmitting electrode 111.

[0035] In terms of circuit connectivity, the second emitter electrode 120 can be electrically connected to the TX pin of the touch chip via a flexible printed circuit board (FPC), PCB, or other wiring. The touch chip can reuse an existing emitter pin or use a dedicated emitter pin to drive the second emitter electrode 120.

[0036] The second signal transmission path utilizes the human body as a medium for signal transmission. Specifically, the touch chip emits a specific second driving signal (such as a radio frequency signal) to the second transmitting electrode 120. Since the human hand is usually held at the edge of the electronic device or placed in the keyboard area, the second driving signal is coupled to the human body through the edge electric field, and then conducted to the first operating object (stylus) held by the hand. The stylus, as a radiation source, further couples the electric field carrying the second driving signal to the receiving electrode 112 of the touch module 110, and finally the touch chip demodulates and calculates the position information of the stylus relative to the touch surface.

[0037] The first signal transmission path and the second signal transmission path are different. The first signal transmission path is based on the direct local electric field coupling between the pen tip and the screen electrodes (first transmitting electrode 111 and receiving electrode 112), and the path is short and concentrated in the pen tip area; the second signal transmission path constructs a long loop signal chain of "chip-electrode 120-human body-pen body-pen tip-screen receiving electrode 112-chip".

[0038] According to embodiments of this disclosure, by adding a second transmitting electrode 120 located in the frame region 113 and constructing a second signal transmission path passing through the human body, the deficiency of insufficient signal quantity in the first signal transmission path caused by the small diameter of the stylus tip can be compensated. Furthermore, when the signal-to-noise ratio decreases due to common-mode interference from the charger or high-frequency noise from the display screen in the first signal transmission path, the second signal transmission path provides a strong signal injection method similar to an active pen mechanism, thereby significantly improving the robustness of the electronic device to stylus detection and the accuracy of coordinate recognition.

[0039] Figure 2 The schematic diagram illustrates the operating timing of an electronic device according to an embodiment of the present disclosure during a detection cycle.

[0040] In embodiments of this disclosure, the controller transmits a first driving signal through a first transmitting electrode and a second driving signal through a second transmitting electrode. The signal frequency of the second driving signal is greater than or equal to the signal frequency of the first driving signal. The first driving signal can be a series of coded high-frequency pulse signals, whose fundamental frequency f1 is set within the conventional frequency band of the touch chip's operation, such as 200 kHz to 500 kHz, for performing conventional touch sensing scanning. The second driving signal is also a coded high-frequency pulse signal, and the selection of its fundamental frequency f2 is flexible.

[0041] In a specific application scenario, when an electronic device is connected to an external power adapter (i.e., a charger), the charger's own switching noise may create strong common-mode interference in a specific frequency band. If this interference frequency band happens to overlap with the frequency f1 of the first drive signal, it will severely pollute the induced signal in the first signal transmission path. Therefore, the controller can set the frequency f2 of the second drive signal to a "clean" frequency far from this interference band, for example, selecting a frequency higher than f1, to achieve frequency avoidance. The selection of frequency f2 can be determined by performing a spectrum analysis of common interference sources beforehand, or by the controller dynamically scanning the ambient noise spectrum during operation and adaptively selecting a frequency with the optimal signal-to-noise ratio.

[0042] In another scenario, when the external electromagnetic environment is favorable, the frequency f2 of the second driving signal can also be set to be the same as the frequency f1 of the first driving signal. In this case, although the frequency difference is not used to avoid noise, the stylus's detection capability can still be enhanced by the inherent high signal-to-noise ratio of the second signal transmission path itself.

[0043] In one implementation, the controller transmits a first drive signal through a first transmitting electrode and a second drive signal through a second transmitting electrode, wherein the signal frequency f2 of the second drive signal is greater than or equal to the signal frequency f1 of the first drive signal. In this mode, the two drive signals can be transmitted simultaneously within one detection cycle. Specifically, the signal generator inside the controller can simultaneously generate two signals of different frequencies and transmit them to the first transmitting electrode 111 and the second transmitting electrode through two different TX pins, respectively. The first drive signal (frequency f1) is sent to the first transmitting electrode, and the second drive signal (frequency f2) is sent to the second transmitting electrode. The receiving electrode receives a mixed coupled signal containing both frequency components. The controller's demodulation module needs to have corresponding filtering capabilities, such as setting two parallel bandpass filters with center frequencies of f1 and f2 respectively, to separate the mixed signal and recover the induced signals from the first signal transmission path and the second signal transmission path, respectively.

[0044] And / or, within the same cycle, the controller transmits a first drive signal to the first transmitting electrode and a second drive signal to the second transmitting electrode, respectively, in a time-division manner. See also Figure 2 The diagram illustrates the driving timing within a complete touch scan frame (or detection cycle). The controller employs a time-division multiplexing mechanism to coordinate the operation of the two signal transmission paths. During the initial period of a scan frame, i.e., the first time slot S1, the controller activates the first signal transmission path.

[0045] Specifically, the controller operates strictly according to a preset timing sequence within a complete scan frame. Please refer to [link / reference]. Figure 2In the first time slot S1, the controller transmits a drive signal (frequency f) to the first transmitting electrode, while the second transmitting electrode remains silent. In the immediately following second time slot S2, the controller stops transmitting signals to the first transmitting electrode and instead transmits a drive signal of the same frequency f to the second transmitting electrode. Since the transmission of the two signals is staggered in time, the signals collected by the receiving electrode in different time slots naturally correspond to different transmission paths.

[0046] In one implementation, the two methods described above can be combined, where the controller not only employs time-division driving but also sets different frequencies (f2 > f1) for the two signals. See again... Figure 2 The timing is similar to that of the second implementation. In the first time slot S1 of a scan frame, the controller transmits a first drive signal with a frequency of f1 to the first transmitting electrode. In the second time slot S2, the controller transmits a second drive signal with a frequency of f2 to the second transmitting electrode. This combination utilizes both time and frequency dimensions for signal isolation. For example, when the charger generates strong common-mode interference near frequency f1, conventional touch detection (first time slot S1) may be affected. However, because the second drive signal uses the less interfered frequency f2, the auxiliary signal acquired in the second time slot S2 remains pure and reliable. The controller can use this high-quality auxiliary signal to confirm the presence of the stylus or accurately calculate its coordinates.

[0047] According to embodiments of this disclosure, a combination of one or more of the above-described driving strategies provides high flexibility and robustness for solving the stylus signal detection problem. Employing a frequency differentiation (frequency division) strategy can directly avoid external noise interference at known frequencies, such as charger interference. Employing a time-division driving strategy can fundamentally eliminate internal signal crosstalk between the two detection paths. Combining both strategies can simultaneously address external interference at specific frequencies and internal signal crosstalk, ensuring stable and accurate identification of weak stylus signals even in various complex electromagnetic environments.

[0048] Figure 3A A schematic diagram illustrating a physical model of a second signal transmission path in an electronic device according to an embodiment of the present disclosure is shown. Figure 3B An equivalent circuit model diagram of a second signal transmission path according to an embodiment of the present disclosure is shown schematically. Figure 3C The diagram illustrates a common-mode noise coupling path of an electronic device in a charging scenario according to an embodiment of the present disclosure.

[0049] In this embodiment, the touch module is a touch display screen disposed on the body 100, the first operating body is a stylus 300, and the second transmitting electrode is an antenna electrode 121 disposed on at least one edge of the touch display screen. The antenna electrode 121 may be made of a conductive material (e.g., a metal mesh) at the same level as the first transmitting and receiving electrodes of the touch display screen and is arranged in the non-display bezel area of ​​the touch display screen. The stylus 300 is a passive or active stylus with a small tip diameter, resulting in a weak signal in conventional detection mode.

[0050] The touchscreen detects the relative position information between the stylus 300 and the touch surface of the touchscreen via a second signal transmission path consisting of a controller, antenna electrode 121, human body 200, stylus 300, and receiving electrode; see reference. Figure 3A and Figure 3B The working principle of this second signal transmission path is as follows: The signal source TX in the controller transmits a drive signal to the antenna electrode 121. When the user operates the stylus 300, their body is the human body 200. The drive signal is coupled to the human body 200 through the coupling capacitor Ctx between the antenna electrode 121 and the human body 200. The signal is conducted on the human body 200, and then conducted to the stylus 300 through the coupling capacitor Cfp between the human body 200 and the stylus 300. Finally, the signal is received by the receiving electrode through the coupling capacitor Cp between the stylus tip of the stylus 300 and the receiving electrode of the touch screen. The receiving electrode is connected to the receiving channel 114 of the controller, and the controller processes the received signal to obtain the induced voltage Vrx_pen.

[0051] The core of this approach lies in effectively coupling the drive signal from the antenna electrode 121 to the human body 200. (See also...) Figure 3C This coupling process is primarily achieved through two different physical mechanisms, depending on the relative position between the user's body and the electronic device: Near-field direct coupling: When the user's hand or body is close to the antenna electrode 121, an equivalent parallel-plate capacitor, known as the CHM (Capacitance Human to Module) in the diagram, is formed between the human body and the device. The closer distance and larger relative area result in a larger capacitance value. Since high-frequency signals preferentially choose the path with the larger capacitance for conduction, the driving signal is primarily coupled directly and efficiently to the human body through this CHM path.

[0052] Far-field ground coupling: When the user's body is far from the device, causing the direct coupling capacitance CHM to become very small, the signal will choose an alternative path. In this case, the drive signal will first be coupled to the Earth Ground through the device's coupling capacitance CME (Capacitance Module to Earth), and then coupled to the human body through the coupling capacitance CHE (Capacitance Human to Earth) between the Earth and the human body. Although this path is relatively indirect, it forms the basis of mutual capacitance detection, ensuring that the second signal transmission path can still establish a connection and work effectively even if the user is not in close contact with the device.

[0053] Furthermore, this second signal transmission path can detect not only the stylus 300 but also the user's palm 210. When the palm 210 touches or approaches the touchscreen, the driving signal is also coupled to the human body 200 via Ctx, and then received by the receiving electrode through the coupling capacitor Cpalm between the palm 210 and the receiving electrode. This signal can be received by another receiving channel 115 to obtain the induced voltage Vrx_palm, which is used for palm suppression or recognition.

[0054] Alternatively, the touchscreen display detects touch operations performed by the stylus on the display via a first signal transmission path consisting of a controller, a first transmitting electrode, a stylus, and a receiving electrode. This first signal transmission path is a conventional mutual capacitance or self-capacitance detection path. The controller transmits a drive signal to the first transmitting electrode within the sensing area of ​​the touchscreen display. When the tip of the stylus 300 approaches, it changes the coupling capacitance between the first transmitting electrode and the receiving electrode, thereby causing a change in the signal on the receiving electrode. The controller determines the coordinates of the stylus 300 by detecting this signal change. This path does not depend on the participation of the antenna electrode 121 and the human body 200.

[0055] The touchscreen display utilizes both the first and second signal transmission paths. For example, the high signal strength and good signal-to-noise ratio of the second signal transmission path can be used for "present / absent" detection or hover detection of the stylus 300. Once the presence of the stylus 300 is confirmed, the first signal transmission path is then activated for high-precision coordinate calculation. Alternatively, the signals acquired from the two paths can be fused to calculate a more stable and accurate coordinate system.

[0056] In some embodiments, such as when severe common-mode interference from the charger causes the first signal transmission path to completely fail, the detection and coordinate calculation of the stylus 300 can be performed solely by relying on the second signal transmission path.

[0057] In some embodiments, such as in a favorable electromagnetic environment or to save power, the antenna electrode 121 may be disabled, and the stylus 300 may be detected using only the first signal transmission path.

[0058] According to embodiments of this disclosure, the second transmitting electrode is specifically embodied as an antenna electrode disposed at the edge of the touch screen, and the signal coupling circuit formed by the human body and the stylus is described in detail. This provides a strong signal injection scheme similar to an active pen to solve the problem of weak signals from small-sized pen tips. By constructing a novel, high signal-to-noise ratio signal transmission path, this scheme can reliably identify the presence of the stylus even in harsh environments such as those with charger interference, avoiding recognition failures caused by the confusion between interference signals and pen signals.

[0059] Figure 4A This schematically illustrates another structural diagram of an electronic device according to an embodiment of the present disclosure; Figure 4B This schematically illustrates another structural diagram of an electronic device according to an embodiment of the present disclosure.

[0060] The main body includes a first body 101 and a second body 102 that are rotatably connected; in this embodiment, the electronic device is specifically a product in the form of a laptop computer. Figure 4A and 4B As shown, the first body 101 and the second body 102 are rotatably connected by a pivot structure 103. The first body 101 is typically the upper half containing the display screen (i.e., the B-side housing), and the second body 102 is typically the lower half containing input devices such as a keyboard (i.e., the C-side housing).

[0061] The touch module includes a touch display screen disposed on a first surface of a first body 101, and an input device disposed on a second surface of a second body 102. When the angle between the first body 101 and the second body 102 is 0 degrees, the first surface is directly opposite the second surface. A second emitting electrode 120 is disposed at the connection point between the first body 101 and the second body 102, or disposed on the second body 102. (See reference...) Figure 4A This embodiment corresponds to a laptop computer with a touch screen. The touch screen, as a touch module, is integrated on the inner side of the first body 101, i.e., the first surface (surface B). Input devices such as a keyboard and touchpad are provided on the inner side of the second body 102, i.e., the second surface (surface C). The arrangement position of the second transmitting electrode 120 can be selected in various ways, the core principle being to place it in an area easily accessible or close to the user's hand to enhance signal coupling efficiency.

[0062] In a specific application scenario, the second emitting electrode 120 can be located at the connection point, for example, integrated into the decorative cover plate of the rotating shaft structure 103.

[0063] In another preferred embodiment, the second transmitting electrode 120 can be disposed on the second body 102, for example, on the edge region of the C-side near the hinge 103, i.e., directly above the keyboard. When the user uses the keyboard or performs screen touch, the palm or arm will naturally hover or be placed near this area, thereby forming a stable signal injection path with a large coupling capacitance.

[0064] Alternatively, the touch module is a touchpad mounted on the second body 102, with the second transmitting electrode 120 located around the periphery of the touchpad. The touchpad detects the relative position information between the touch pen and the touch surface of the touchpad through a second signal transmission path consisting of a controller, the second transmitting electrode 120, the human body, the stylus, and the receiving electrode. (See also...) Figure 4B This embodiment corresponds to a touchpad that supports stylus operation. In this case, the touch module is the touchpad disposed on the second body 102 (C-side). The second transmitting electrode 120 is specifically disposed in the peripheral area of ​​the touchpad, such as the palm rest area below or on both sides of the touchpad. When the user holds the stylus and operates on the touchpad, their wrist or palm will usually be naturally placed in the palm rest area, which just covers the second transmitting electrode 120.

[0065] At this time, the working process of the second signal transmission path is as follows: the controller sends a drive signal to the second transmitting electrode 120 around the touchpad. The signal is coupled to the user's palm, conducted through the human body to the stylus, and then coupled to the receiving electrode in the sensing area of ​​the touchpad through the pen tip. Finally, it is detected by the controller. This path can provide signal supplementation for the weak stylus signal detection on the touchpad.

[0066] According to embodiments of this disclosure, by arranging the second transmitting electrode at specific locations such as the hinge of the laptop, above the keyboard on the C-side, or around the touchpad, the natural hand placement posture of the user when using the laptop is fully utilized. These locations ensure the formation of a stable and efficient capacitive coupling channel between the user's body and the second transmitting electrode, thereby injecting a signal of sufficient strength into the second signal transmission path. This allows for flexible application in various touch modules of different forms, such as touch displays and touchpads that support handwriting.

[0067] According to embodiments of this disclosure, the electronic device further includes at least one of the following: the impedance of the material used to fabricate the second transmitting electrode is less than that of the first transmitting electrode; the second transmitting electrode shares the same transmitting channel on the controller with the first transmitting electrode, or the second transmitting electrode and the first transmitting electrode are respectively connected to different transmitting channels on the controller; and the signal frequency of the second driving signal emitted by the second transmitting electrode is greater than 200 kHz.

[0068] The impedance of the material used to fabricate the second emitting electrode is lower than that of the first emitting electrode. To minimize the attenuation of the driving signal during transmission and ensure that the signal can be radiated from the second emitting electrode with high energy efficiency, the second emitting electrode is preferably made of a low-impedance material. Specifically, the first emitting electrode in the touch module, in order to balance light transmittance and conductivity, is typically made of transparent indium tin oxide (ITO) or a fine metal mesh process, and these materials themselves have a certain thin-film resistance.

[0069] Figure 5 A touch sensor stack according to an embodiment of the present disclosure is illustrated schematically.

[0070] See Figure 5 From top to bottom, the layers are: cover glass, optical adhesive (OC0), first metal mesh layer, insulating layer (INS), second metal mesh layer, and optical adhesive (OC2). The first emitting electrode and the receiving electrode are typically fabricated within these two metal mesh layers, respectively. To ensure high light transmittance in the display area, these electrodes must be designed with a very fine mesh structure, which gives them a certain thin-film resistance (i.e., impedance).

[0071] In contrast, since the second transmitting electrode is typically located in a non-display area and light transmittance is not a concern, materials with superior conductivity can be used, such as copper (Cu) meshes with higher areal density or wider linewidths, or copper foil strips directly. By reducing the impedance of the second transmitting electrode itself, the voltage drop along the electrode trace can be effectively reduced, ensuring that the entire electrode surface becomes a uniform and strong signal source. This enhances the coupling strength with the human body and provides a stronger initial signal for the second signal transmission path.

[0072] The second transmitting electrode shares the same transmitting channel on the controller as the first transmitting electrode, or the second transmitting electrode and the first transmitting electrode are respectively connected to different transmitting channels on the controller. Specifically, there are two implementation methods: In one embodiment, a shared transmitting channel design is used to save pin resources on the controller. Specifically, the same transmitting pin (TX pin) of the controller is connected to the drive bus of the first transmitting electrode and the trace of the second transmitting electrode respectively through a switching switch (e.g., an analog multiplexer) controlled by the controller's internal logic. When the controller executes a time-division driving strategy, this switching switch works in concert: in the first time slot of performing regular touch scanning, the switching switch turns on the transmitting pin to the first transmitting electrode; in the second time slot of performing auxiliary detection, it switches to the second transmitting electrode.

[0073] In another implementation, an independent transmit channel design is employed to provide greater driving flexibility. Specifically, the first transmit electrode is connected to a dedicated set of transmit pins on the controller, while the second transmit electrode is connected to another or another set of independent transmit pins. This design allows the controller to perform completely independent timing and signal parameter control on the two paths. For example, the controller can simultaneously transmit drive signals of different frequencies to the two channels (achieving frequency division multiplexing), or scan with more complex interleaved timing, without the need for external switching circuitry.

[0074] The frequency of the second driving signal emitted by the second transmitting electrode is greater than 200kHz. This frequency range is a typical operating frequency band for effective signal coupling in capacitive touch technology. Setting the fundamental frequency of the second driving signal above 200kHz ensures that the driving signal can be effectively transmitted via capacitive coupling through media such as air and the human body. It also provides a basis for avoiding common low-frequency noise (such as interference from power supply frequencies). In practical applications, the controller can intelligently select a "clean" frequency (e.g., up to 500kHz or higher) within this range with minimal noise interference through pre-simulation analysis or noise spectrum detection of the actual working environment. This maximizes the signal-to-noise ratio of the second signal transmission path and achieves optimal detection results.

[0075] According to embodiments of this disclosure, the auxiliary detection path is deeply optimized from multiple dimensions by specifically defining the physical structure of the second transmitting electrode (e.g., employing a low-impedance design), the circuit connection method, and the driving signal frequency. The use of low-impedance materials ensures strong signal transmission; the flexible transmitting channel connection method provides a balance between cost and performance in the circuit design; and setting an effective signal frequency range ensures the physical basis for signal coupling and provides operational controls for advanced anti-interference strategies such as dynamic frequency selection.

[0076] According to embodiments of this disclosure, the controller demodulates a first coupling signal sampled by the receiving electrode to obtain a first inductive signal, and demodulates a second coupling signal sampled by the receiving electrode to obtain a second inductive signal. The first coupling signal is generated by the change in the electric field formed by the first driving signal, and the second coupling signal is generated by the change in the electric field formed by the second driving signal. Here, the coupling signal refers to the original high-frequency AC signal carrying touch information directly acquired by the receiving electrode. Changes in the amplitude or phase of this signal reflect changes in the coupling capacitance. The inductive signal is a DC or low-frequency signal obtained by the controller after filtering, amplifying, and demodulating the coupling signal (e.g., integration or digital quadrature demodulation), and its magnitude directly corresponds to the signal strength.

[0077] Specifically, the first coupling signal is generated through a short path coupling from the first transmitting electrode to the stylus tip and then to the receiving electrode when the first transmitting electrode is in operation. The second coupling signal is generated through a long path coupling from the second transmitting electrode to the human body, the stylus, and then to the receiving electrode when the second transmitting electrode is in operation. The controller independently processes these two coupling signals, which are collected at different times or frequencies, to obtain the first sensing signal and the second sensing signal, respectively.

[0078] When the controller determines that a first operating object is near the touch surface based on a second sensing signal, it causes the electronic device to execute a touch response corresponding to the first sensing signal. Because the second signal transmission path has high signal strength and strong anti-interference capability, the controller first analyzes the strength of the second sensing signal. The controller internally presets one or more existence judgment thresholds. When the controller detects that the amplitude of the second sensing signal exceeds a preset threshold, it can determine with high confidence that a first operating object (stylus) is indeed within the effective sensing range of the touch surface. This range can be defined as a specific hovering height, for example, 5 mm to 15 mm from the touch surface.

[0079] Once the presence of the stylus is confirmed, the controller will trust and further process the first sensing signal generated by the first signal transmission path. Although the first sensing signal may be weak or affected by noise, the controller now knows that these signal changes are caused by the actual stylus, not random noise. The controller will collect the first sensing signal values ​​distributed on all receiving electrodes and calculate the high-precision two-dimensional coordinates of the stylus tip on the touch plane using a centroid algorithm or a more complex interpolation algorithm.

[0080] After calculating the precise coordinates, the controller packages this coordinate information, along with the touch state (e.g., "hover" or "touch"), into a standard data format and sends it to the electronic device's main processor (CPU) via the internal bus. Upon receiving this data packet, the operating system (OS) on the main processor interprets it as a system-level touch event through its input device driver. The OS then distributes this event to the currently active foreground application. For example, if the user is using a drawing application, upon receiving the coordinate event, the application will render a pixel or begin a stroke at the corresponding location on the canvas. If the user is on the operating system's desktop, the system will display a hover cursor at the corresponding location on the screen, following the pen tip's movement in real time.

[0081] According to the embodiments of this disclosure, by adopting the control logic of "first confirming the presence with the second signal, and then accurately locating with the first signal", it is possible to effectively distinguish between weak real pen signals and background noise. This solves the problem that in a strong interference environment, it is difficult to determine whether the stylus is real based on the weak first signal alone, and misjudgment or omission is likely to occur. It ensures that the system only performs high-precision coordinate calculations and touch response when it confirms that the stylus is really close, which greatly improves the reliability and accuracy of stylus detection and avoids "abnormal points" or broken lines on the screen caused by noise interference.

[0082] According to an embodiment of this disclosure, the touch module is a touch display screen mounted on the main body, and the first operating object is a stylus. The controller needs to calculate the coordinates of the stylus tip on the two-dimensional plane of the screen in real time and accurately, and transmit this information to the upper-level operating system.

[0083] In one embodiment, the controller sends the touch coordinates of the stylus on the touchscreen display, determined based on a first sensing signal, to the electronic device, causing the electronic device to execute a touch response corresponding to the touch coordinates. Two signal transmission paths play distinct roles. The second signal transmission path (generating the second sensing signal) is primarily responsible for highly reliable "presence" detection, while the first signal transmission path (generating the first sensing signal) is dedicated to high-precision "coordinate" calculation. Specifically, the controller first analyzes the second sensing signal; when its intensity exceeds a preset threshold, it confirms that the stylus has entered the effective sensing area. After confirming the stylus's presence, the controller shifts its calculation focus entirely to the first sensing signal. The first sensing signal is a two-dimensional signal intensity distribution map formed on all receiving electrodes of the touchscreen display. The receiving electrode directly below the stylus tip and its adjacent electrodes receive the strongest signal. The controller then applies a centroid algorithm to this two-dimensional signal distribution map, calculating the signal intensity-weighted average of the electrode positions to resolve sub-pixel-level precise coordinates with a resolution far exceeding the physical distance between the electrodes. Ultimately, this high-precision coordinate, calculated entirely based on the first sensing signal, is sent to the electronic device's operating system to drive cursor movement or generate handwriting. During this process, the spatial distribution information of the second sensing signal can be ignored; its role is limited to triggering the coordinate calculation "switch."

[0084] Figure 6 This schematically illustrates another structural diagram of an electronic device according to an embodiment of the present disclosure.

[0085] like Figure 6As shown, the second transmitting electrode 120 consists of multiple antenna electrodes disposed around the touch display screen. For example, in the frame area 113 outside the touch sensing area 110 of the electronic device 100, strip-shaped antenna electrodes are arranged along the four edges of the touch display screen, collectively forming a surrounding second transmitting electrode 120. This second transmitting electrode 120 is physically separate from the electrode array formed by the first transmitting electrode 112 and the receiving electrode 111 used for conventional touch detection.

[0086] When the controller transmits a second driving signal to the second transmitting electrode 120, the signal is coupled to the touch sensing area 110 via the human body and the stylus, and is received by a plurality of receiving electrodes 111 arranged in an array within the area. Because the position of the stylus tip varies, the signal strength coupled to different receiving electrodes 111 also varies, thus forming a two-dimensional signal strength distribution map on the receiving electrode array. Based on this signal distribution map, for example using a centroid algorithm, the touch coordinates of the stylus on the touch display screen are calculated.

[0087] For the same reason, when the touch module is a touchpad mounted on the second body 102 (see reference) Figure 4B When the second transmitting electrode is arranged in a manner similar to that of multiple antenna electrodes arranged around the touch panel, the distribution and signal processing method are similar to those of the case where the second transmitting electrode is arranged in a manner similar to that of multiple antenna electrodes arranged around the touch screen, and will not be described in detail here.

[0088] In another implementation, the controller sends the touch coordinates of the stylus on the touchscreen display, determined based on the first and second sensing signals, to the electronic device, causing the electronic device to execute a touch response corresponding to the touch coordinates. The controller fuses the signals from the two paths to calculate a more stable and reliable final touch coordinate in complex environments. For example, the final touch coordinate is obtained by weighted summing of the touch coordinates obtained independently from the two paths.

[0089] For example, a specific implementation could be as follows: The controller first processes two signals in parallel. Based on the distribution of the first sensed signal, it calculates a high-precision "first preliminary coordinate." Simultaneously, based on the distribution of the second sensed signal, it calculates a "second preliminary coordinate." While calculating the coordinates, the controller continuously evaluates the "purity" or "signal-to-noise ratio" of the two original signals. A high-quality signal is characterized by a signal strength significantly higher than the background electrical noise; while a low-quality signal may be mixed with a large amount of interference, making the signal itself weak or unstable. Based on the real-time quality evaluation of the two signals, the controller dynamically determines the composition of the final output coordinates, giving greater "influence" or "weight" to the preliminary coordinates calculated from the high-quality signal, while reducing the influence of the preliminary coordinates calculated from the low-quality signal. Then, the result of an intelligent weighted combination of the two preliminary coordinates based on their real-time reliability is used as the final result.

[0090] For example, when the device is not connected to a charger and the electromagnetic environment is good, both signal quality paths are high, and the controller may prioritize the first preliminary coordinates because they typically have higher spatial resolution. However, when the device is connected to a charger that generates severe interference, if this interference contaminates the first signal path, the controller will detect a sharp drop in the quality of the first induced signal. In this case, the controller will automatically reduce the weight of the first preliminary coordinates and significantly increase the weight of the second preliminary coordinates calculated from the cleaner second induced signal. The final output coordinates will then be primarily determined by the second preliminary coordinates.

[0091] According to embodiments of this disclosure, the solution provides two progressive coordinate calculation strategies, giving electronic devices a high degree of environmental adaptability. The first method utilizes a second signal as a reliable trigger, solving the problem of stylus "false recognition" and "missed recognition" caused by noise interference. The second method, through a dynamic weighted fusion algorithm, further solves the problem that even if the stylus is recognized in a strong interference environment, its positioning coordinates may still "jitter" or "drift" due to noise contamination.

[0092] According to embodiments of this disclosure, the touch module is a touch display screen of an electronic device, which includes a first mode and a second mode. In this embodiment, the touch system of the electronic device is designed with two switchable working states optimized for different input tools. The first mode can be understood as a "standard touch mode," which is the system's default and normal working state. The second mode is a "high-precision pen input mode," an enhanced working state designed to cope with special input tools such as styluses that are small in size and have weak signals.

[0093] In the first mode, the controller detects touch operations applied to the touchscreen display via a first signal transmission path. In this mode, the controller is activated only and relies on the first signal transmission path. The controller transmits a drive signal to the first transmitting electrode within the touchscreen display's sensing area. When a user's finger approaches or touches the screen, the finger, being a good conductor, significantly alters the mutual capacitive coupling electric field between the first transmitting and receiving electrodes. The controller identifies the touch operation and calculates its coordinates by detecting the significant change in the signal on the receiving electrode. In this mode, the second transmitting electrode (antenna electrode) and its corresponding drive circuit are inactive, for example, set to a high-impedance state or completely de-energized.

[0094] In the second mode, the controller detects touch operations applied to the touchscreen display via both the first and second signal transmission paths. In this mode, the controller simultaneously activates both the first and second signal transmission paths, allowing them to work collaboratively. The first signal transmission path (TPIC → first transmitting electrode → pen tip → receiving electrode → TPIC) continues to operate, its primary function being to acquire fine changes in the local electric field caused by the pen tip, providing fundamental data for high-precision coordinate calculations. The second signal transmission path (TPIC → second transmitting electrode → human body → pen body → pen tip → receiving electrode → TPIC) is simultaneously activated. On one hand, it serves as a high-confidence presence confirmation signal; on the other hand, it can be fused with the signal from the first path for coordinate correction and stabilization in environments with strong interference.

[0095] According to embodiments of this disclosure, an intelligent, resource-optimized touch detection strategy is achieved by establishing two different operating modes. When the user performs regular finger touches, the system operates in a low-power first mode, effectively extending the device's battery life. When the user needs to perform precise operations using a stylus, it switches to a high-performance second mode. By activating a second signal transmission path and leveraging the advantages of dual-path signal collaborative detection, the system solves the problems of weak stylus signals and susceptibility to environmental interference.

[0096] According to embodiments of this disclosure, the electronic device can also detect noise interference in its surrounding environment to switch from a first mode to a second mode based on the noise interference. Noise interference can refer to specific electromagnetic interference that poses a threat to stylus detection. Conventional background noise is typically broadband and low-amplitude, while stylus detection is challenged by narrow-band, high-intensity noise that closely resembles the actual, weak stylus signal in amplitude and frequency. A typical example is switching noise generated by a poorly designed third-party power adapter (charger), whose specific harmonic components may fall within the operating frequency band of the touch system, forming a "pseudo-signal" that the controller may misinterpret as a stylus signal.

[0097] The controller can periodically enter a "silent scan" or "listening" phase (e.g., between frames or every few frames). During this phase, the controller pauses the transmission of drive signals from all first and second transmitting electrodes. In silent mode, the controller's receiving channel continuously samples the ambient signals on all receiving electrodes. The controller's internal digital signal processor performs a Fast Fourier Transform on the acquired raw data, converting it from a time-domain signal to a frequency-domain signal. On the resulting noise spectrum, the controller checks for energy peaks exceeding a preset "interference threshold" within the operating frequency band of the first signal transmission path (e.g., 200kHz-500kHz). If such an abnormal, isolated energy peak is detected, the controller determines that significant noise interference exists in the current environment. Based on this detection result, the controller then executes intelligent mode-switching logic.

[0098] For example, a user is using a laptop in its default first mode, where only the first signal transmission path is used for routine finger touch detection. The user then plugs a cheap, non-EMC-certified phone charger into a socket next to the laptop. The charger starts working and radiates strong electromagnetic noise into the surrounding space, with one of its harmonic frequencies at 350kHz. During the next routine silent scan, the laptop's touch controller analyzes the noise and finds an energy spike near 350kHz that far exceeds normal background noise levels. Therefore, it determines that under this interference, if the user uses a stylus, its weak real signal is likely to be drowned out by this strong noise (leading to a missed detection), or the noise itself may be incorrectly identified as a hovering stylus (leading to a false alarm).

[0099] At this point, the system switches from the first mode to the second mode. In the second mode, the controller activates the second signal transmission path, utilizing its high signal strength and good signal-to-noise ratio to combat noise interference. The controller can even be further optimized by selecting a "clean" frequency far removed from the 350kHz interference frequency to drive the second transmitting electrode, thereby achieving active frequency avoidance.

[0100] According to embodiments of this disclosure, the controller can also control the signal frequencies of the first driving signal and / or the second driving signal based on the attribute information of the first operating body communicatively connected to the electronic device. Communicatively connected to the electronic device means that the first operating body (e.g., a stylus) is an active device capable of bidirectional or unidirectional communication with the electronic device, such as via Bluetooth Low Energy or other near-field communication protocols. Attribute information refers to a set of data actively sent by the stylus to the electronic device, which may include its unique model identifier, firmware version, pressure sensitivity level, and its optimal resonant frequency or recommended operating frequency. Different styluses may have the highest signal response efficiency at a specific frequency due to differences in internal circuitry, antenna design, or tip material.

[0101] Furthermore / or, the controller can also adjust the signal frequencies of the first drive signal and / or the second drive signal based on the noise interference in the surrounding environment. As described in the foregoing embodiments, the controller identifies specific interference frequencies in the environment through silent scanning and spectrum analysis. Once interference is identified, the control mechanism is activated, switching the frequency of the drive signal from the contaminated frequency to a relatively "clean" frequency to actively avoid interference.

[0102] In one implementation, optimization is based on the attribute information of a first operating entity, and the frequency adjustment is entirely determined by the attributes of the connected first operating entity. For example, when a user uses a "standard pen," the pen connects to the device via Bluetooth and reports its attribute information, which indicates that its optimal operating frequency is 300kHz. Upon receiving this information, the controller sets the frequency of the first and / or second drive signals to 300kHz. When the user switches to a "professional pen," the attribute information reported by the pen after connection indicates that its optimal operating frequency is 450kHz. The controller then automatically adjusts the drive signal frequency to 450kHz.

[0103] In another implementation, optimization is based on the frequency of ambient noise, with frequency adjustment entirely determined by real-time environmental noise. For example, if a user is using a stylus and someone nearby is using a high-powered appliance or a substandard charger, generating strong noise interference at the device's current operating frequency of 300kHz, the handwriting may become intermittent. The controller performs ambient noise detection during the intervals of regular scans. If spectrum analysis reveals a noise spike near 300kHz that is significantly higher than normal, the controller quickly searches a preset list of available frequencies (e.g., 200kHz to 600kHz) for a "clean" channel with the lowest current noise level (e.g., 480kHz), switches the drive signal frequency to 480kHz, and restores a smooth writing experience.

[0104] In another implementation, optimization can be achieved by combining the attribute information of the first operator with the frequency of the ambient noise, which will not be elaborated here.

[0105] According to embodiments of this disclosure, the frequency control of the touch system is changed from a fixed, static setting to dedicated performance optimization for different hardware peripherals through communication with the active stylus. By actively avoiding environmental noise, a high degree of adaptability to complex and ever-changing usage scenarios is achieved. Furthermore, combining these two aspects allows the electronic device to intelligently calculate and switch to the "optimal solution" operating frequency under any peripheral and any environment.

[0106] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions. Those skilled in the art will understand that the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways, even if such combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments of this disclosure may be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0107] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. An electronic device, comprising: ontology; The touch module disposed on the body includes a plurality of first transmitting electrodes and a plurality of receiving electrodes arranged in a cross pattern. The touch module detects touch operations applied to the touch module through a first signal transmission path including the first transmitting electrodes and the receiving electrodes. At least one second transmitting electrode is disposed on the body, the second transmitting electrode is connected to the controller signal of the touch module, the placement position of the second transmitting electrode is different from the placement position of the first transmitting electrode, and the touch module detects the relative position information between the first operating body and the touch surface of the touch module through a second signal transmission path including the second transmitting electrode and the receiving electrode; The first signal transmission path and the second signal transmission path are different.

2. The electronic device according to claim 1, wherein the controller transmits a first driving signal through the first transmitting electrode, the controller transmits a second driving signal through the second transmitting electrode, and the signal frequency of the second driving signal is greater than or equal to the signal frequency of the first driving signal; And / or, The controller transmits a first driving signal to the first transmitting electrode and a second driving signal to the second transmitting electrode in a time-division manner within the same cycle.

3. The electronic device according to claim 1 or 2, wherein the touch module is a touch display screen disposed on the body, the first operating body is a stylus, and the second transmitting electrode is an antenna electrode disposed on at least one edge of the touch display screen; The touch screen detects the relative position information between the stylus and the touch surface of the touch screen through a second signal transmission path consisting of the controller, the antenna electrode, the human body, the stylus, and the receiving electrode; And / or, The touch screen detects the touch operation of the stylus on the touch screen through a first signal transmission path consisting of the controller, the first transmitting electrode, the stylus, and the receiving electrode.

4. The electronic device according to claim 1 or 2, wherein the body comprises a first body and a second body rotatably connected; The touch module includes a touch display screen disposed on a first side of the first body, and an input device disposed on a second side of the second body. When the angle between the first body and the second body is 0 degrees, the first side is directly opposite the second side. The second transmitting electrode is disposed at the connection between the first body and the second body, or disposed on the second body. or, The touch module is a touch panel disposed on the second body. The second transmitting electrode is disposed on the periphery of the touch panel. The touch panel detects the relative position information between the touch pen and the touch surface of the touch panel through a second signal transmission path composed of the controller, the second transmitting electrode, the human body, the stylus, and the receiving electrode.

5. The electronic device according to claim 1 or 2, wherein, It also includes at least one of the following: The impedance of the material used to fabricate the second emitting electrode is less than that of the first emitting electrode; The second transmitting electrode shares the same transmitting channel on the controller as the first transmitting electrode, or the second transmitting electrode and the first transmitting electrode are respectively connected to different transmitting channels on the controller; The frequency of the second driving signal emitted by the second transmitting electrode is greater than 200kHz.

6. The electronic device according to claim 2, wherein the controller demodulates the first coupling signal sampled by the receiving electrode to obtain a first sensing signal, and the controller demodulates the second coupling signal sampled by the receiving electrode to obtain a second sensing signal, wherein the first coupling signal is generated by the change in the electric field formed by the first driving signal, and the second coupling signal is generated by the change in the electric field formed by the second driving signal; When the controller determines that the first operating body is close to the touch surface based on the second sensing signal, it causes the electronic device to execute a touch response corresponding to the first sensing signal.

7. The electronic device according to claim 6, wherein the touch module is a touch display screen disposed on the main body, and the first operating body is a stylus; The controller sends the touch coordinates of the stylus on the touch display screen, determined based on the first sensing signal, to the electronic device, so that the electronic device executes a touch response corresponding to the touch coordinates; or, The controller sends the touch coordinates of the stylus on the touch display screen, determined based on the first sensing signal and the second sensing signal, to the electronic device, so that the electronic device executes a touch response corresponding to the touch coordinates.

8. The electronic device according to claim 1, wherein the touch module is a touch display screen of the electronic device, and the electronic device includes a first mode and a second mode; In the first mode, the controller detects touch operations applied to the touch display screen through the first signal transmission path; In the second mode, the controller detects touch operations applied to the touch display screen through the first signal transmission path and the second signal transmission path.

9. The electronic device according to claim 8, wherein the electronic device is further capable of detecting noise interference in the surrounding spatial environment, and switching from the first mode to the second mode based on the noise interference.

10. The electronic device according to claim 2, wherein the controller is further capable of controlling the signal frequency of the first drive signal and / or the second drive signal based on the attribute information of the first operating body communicatively connected to the electronic device; And / or, The controller can also adjust the signal frequency of the first drive signal and / or the second drive signal based on the noise interference of the surrounding environment.

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