Active capacitive stylus supporting WiFi data transmission and multi-device synchronization method thereof

Abstract

The invention relates to the field of active capacitance pens, in particular to an active capacitance pen supporting WiFi data transmission and a multi-device synchronization method thereof.The active capacitance pen comprises a capacitance pen body and further comprises a capacitance pen point, a data processing module, a WiFi communication module, a storage module, a power module and a signal amplification module, and the capacitance pen point is arranged at the right end of the capacitance pen body; a touch electrode used for touching a touch device screen and generating an original writing signal is arranged in the capacitive pen point, and the data processing module is electrically connected to the left side of the capacitive pen point. Compared with the prior art, the wireless communication chip is matched with the transmission antenna, 2.4 G / 5G double-frequency dynamic switching is supported (a frequency band with less interference is automatically selected through a DFS function), radio frequency signal enhancement of the signal amplification module is combined, the transmission rate and the coverage range are considered, and the wireless communication antenna adapts to a complex electromagnetic environment; the low-power-consumption control circuit board triggers the data processing module and the WiFi module to sleep when the capacitance pen body is idle, so that standby power consumption is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the field of active capacitive pens, in particular to an active capacitive pen supporting WiFi data transmission and a multi-device synchronization method thereof. BACKGROUND

[0002] An active capacitive pen is a high-precision input device that interacts with a touch screen through an internal circuit. Compared with a passive capacitive pen (only simulating finger touch), the active capacitive pen has advantages such as pressure sensing, tilt detection, low delay, and is widely used in fields such as drawing, note-taking, and design.

[0003] However, the existing active capacitive pen has the following defects when in operation: poor signal transmission stability, dependence on a single WiFi module, no active signal enhancement design, easy packet loss in weak signal environment, high delay, poor battery life, no low-power sleep mechanism, high power consumption during continuous transmission, and only single-device connection, unable to automatically adapt to multiple devices active state, thus lacking a design that can ensure signal transmission stability, strong battery life, and multi-device data synchronization. SUMMARY

[0004] The application aims to provide an active capacitive pen supporting WiFi data transmission and a multi-device synchronization method thereof, mainly to solve the technical problems of unstable transmission, high synchronization delay, single data dimension, poor scene adaptability, and lack of multi-device data synchronization in the prior art in a multi-device scenario.

[0005] To solve the above technical problems, the application provides the following technical solutions:

[0006] The application discloses an active capacitive pen supporting WiFi data transmission, which comprises a capacitive pen body, a capacitive pen tip, a data processing module, a WiFi communication module, a storage module, a power module and a signal amplification module; the capacitive pen tip is arranged at the right end of the capacitive pen body, and a touch electrode for contacting a touch device screen and generating original writing signals is arranged in the capacitive pen tip; the data processing module is electrically connected to the left side of the capacitive pen tip, and a data encapsulation transmission unit for encapsulating standardized writing data is arranged in the data processing module; the WiFi communication module is electrically connected to the left side of the data processing module, and a wireless communication chip for connecting with external multiple devices is arranged in the WiFi communication module; a switch key electrically connected with the wireless communication chip is arranged on the outer wall of the capacitive pen body; a master control chip is arranged in the middle of the capacitive pen body; the storage module is electrically connected to the left side of the data processing module and located at the left side of the master control chip; the storage module is provided with a nonvolatile memory for pre-storing device pairing information, synchronous configuration parameters and historical writing data; the power module is arranged at the left end in the capacitive pen body, and a low-power control circuit board for reducing standby power consumption is arranged in the power module; the signal amplification module is slidably arranged at one end of the capacitive pen body and located at the left side of the capacitive pen body; the signal amplification module is electrically connected with the WiFi communication module; and a signal amplifier for amplifying signals is arranged in the signal amplification module.

[0007] The working principle and beneficial effects of the application are as follows:

[0008] 1. Working principle: when a user uses the capacitive pen body to write or touch, the touch electrode in the capacitive pen tip contacts a touch device screen, senses the electric field change on the screen surface, generates original writing signals (including coordinate position, pressure value, moving track and other original data), and transmits the signals to the data processing module through the capacitive pen tip; a data encapsulation transmission unit encapsulates standardized data into data packets conforming to a wireless communication protocol, for subsequent transmission; in one way, the data packets are transmitted into the nonvolatile memory of the storage module, and historical writing data, device pairing information and synchronous configuration parameters are long-term stored, so that subsequent data calling or cross-device synchronization is facilitated; in another way, the data packets are synchronously transmitted to the wireless communication chip of the WiFi communication module, the chip sends the data packets to external multiple devices through the WiFi protocol according to the current connection mode (such as 2.4G / 5G frequency band, target device priority), realizes wireless projection of real-time writing content, and a master control chip monitors the states of each module (such as data processing load, WiFi signal strength, power supply capacity) in real time and performs the following coordination functions: the power module provides power support for each module, the low-power control circuit board triggers the data processing module and the WiFi module to sleep when the capacitive pen body is idle, reduces standby power consumption, and the signal amplification module enhances the radio frequency signal, balances transmission rate and coverage range, and adapts to complex electromagnetic environments.

[0009] 2. Benefits:

[0010] (1) Through the wireless communication chip and the transmission antenna, support 2.4G / 5G dual-frequency dynamic switching (select the frequency band with less interference automatically through DFS function), combined with the radio frequency signal enhancement of the signal amplification module, both transmission rate and coverage range are considered, and the complex electromagnetic environment is adapted.

[0011] (2) Through the low-power control circuit board, the data processing module and the WiFi module are triggered to sleep when the capacitive pen body is idle, and the standby power consumption is reduced.

[0012] (3) Through manual triggering and state synchronization triggering of the switching key, the diversified scene needs of users from daily writing to cross-device collaboration are covered.

[0013] (4) Through real-time monitoring of the target device running state by the main control chip, when the device state changes to active writing, the last synchronization position is automatically synchronized and the historical data is supplemented, and this process avoids the content fault through the historical backup of the non-volatile memory.

[0014] The capacitive pen tip further comprises a pressure sensor and a gyroscope, the pressure sensor is electrically connected to one end of the touch electrode, and the pressure sensor is electrically connected to the left side of the pressure sensor; the touch electrode inside the capacitive pen tip contacts the screen to generate an original writing signal, the pressure sensor inside the capacitive pen tip detects the writing pressure in real time to output a pressure value signal, and the gyroscope detects the inclination angle of the capacitive pen to output a posture signal.

[0015] The data processing module further comprises a signal receiving unit and a signal conversion unit, the signal receiving unit is installed inside the capacitive pen body, the signal conversion unit is installed on the left side of the signal receiving unit, and the data packaging transmission unit is installed outside the signal conversion unit; the signal receiving unit converts the original signal into a digital quantity and transmits it to the signal conversion unit, and the signal conversion unit filters and denoises the data, calibrates the coordinates, and generates standardized writing data.

[0016] The WiFi communication module further comprises a transmission antenna and a microcontroller, the transmission antenna is arranged inside the capacitive pen body, one end of the transmission antenna is electrically connected with the wireless communication chip, and the other end is electrically connected with the signal amplification module, the wireless communication chip is installed inside the capacitive pen body, and the microcontroller is installed on the wireless communication chip; the user presses the switching key to send a manual synchronization instruction to the microcontroller of the WiFi communication module, the microcontroller calls the synchronization strategy priority of the main device, the timestamp rule or the user-defined rule in the data packaging transmission unit to determine the current main synchronization device.

[0017] The non-volatile memory is installed inside the body of the capacitive pen, and the non-volatile memory is arranged on the left side of the master control chip; after the master control chip is started, pre-stored device pairing information, such as the MAC address and name of the paired device, synchronization configuration parameters, such as the priority rule of the master device, the timestamp rule and the historical writing data index, are read from the non-volatile memory.

[0018] The power module further comprises a rechargeable lithium battery, a power management chip, a charging port, an indicator light and an on-off key. The low-power consumption control circuit board is installed inside the body of the capacitive pen, and the low-power consumption control circuit board is located on the left side of the storage module. The rechargeable lithium battery is installed on the low-power consumption control circuit board, and the power management chip is installed on the low-power consumption control circuit board close to the right side of the rechargeable lithium battery. The charging port is installed on the outer wall of the body of the capacitive pen corresponding to the outer side of the rechargeable lithium battery. The indicator light is installed on the outer wall of the body of the capacitive pen corresponding to the outer side of the rechargeable lithium battery. The on-off key is installed on the outer wall of the body of the capacitive pen corresponding to the outer side of the rechargeable lithium battery. When the user presses the on-off key on the outer wall of the body of the capacitive pen, the rechargeable lithium battery supplies power to each module through the low-power consumption control circuit board. The low-power consumption control circuit board enters the low-power consumption mode by default, only maintaining the basic circuit operation, and reducing the standby power consumption.

[0019] The signal amplifier is slidably installed at one end of the body of the capacitive pen, and one end of the signal amplifier is provided with a ball head. Through the signal amplifier, the signal can be actively enhanced in a weak signal environment, and the reliability of long-distance transmission is improved.

[0020] The WiFi communication module sends a synchronization success instruction to all target devices, and the target device end displays the synchronization state. The WiFi communication module sends a synchronization success instruction to all target devices, and the target device displays a state prompt such as synchronization completion or update through the screen.

[0021] The WiFi communication module supports IEEE802.11 series protocols (including 2.4G / 5G dual frequency). It can automatically avoid the occupied 2.4GHz channel or switch to the 5GHz frequency band, thereby reducing the packet loss rate (the actual test packet loss rate is less than 1% in a weak interference environment, and the packet loss rate is reduced to less than 3% in a strong interference environment).

[0022] A kind of active capacitive pen multi-device synchronization method supporting WiFi data transmission, comprising the following steps:

[0023] Comprising the following steps:

[0024] S1, search device: scan the WiFi beacon frame in the local area network through the wireless communication chip in cooperation with the signal amplifier, identify the paired target device with broadcasted pairing identifier, and generate a device list containing device name, MAC address and type;

[0025] S2, synchronizing multi-terminal device: detecting whether there are at least two target devices in an active state in the device list, if yes, triggering a multi-device synchronization process, and a user can send a manual synchronization instruction to a microcontroller in a WiFi communication module by pressing a switching key, so that the target device end sends a multi-terminal synchronization request;

[0026] S3, priority identification: a data packaging and transmission unit determines a current master synchronization device based on a pre-stored synchronization strategy in a non-volatile memory, including a master device priority, a timestamp rule or a user-defined rule;

[0027] S4, identifying device: a master control chip monitors the running state of each target device in real time, and obtains a state change notification sent by the device through a wireless communication chip, when a signal is received through a transmission antenna and any target device state change is detected to be an active writing state, a microcontroller reads the last synchronization position of the device from a non-volatile memory, and broadcasts a state synchronization instruction to all devices, requiring to synchronize the current writing context. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a three-dimensional structure diagram of the active capacitive pen supporting WiFi data transmission;

[0029] Figure 2 It is a module diagram of the active capacitive pen supporting WiFi data transmission

[0030] Figure 3 It is a diagram of the active capacitive pen supporting WiFi data transmission and its multi-device synchronization method.

[0031] The reference signs in the drawings of the specification include:

[0032] 1, capacitive pen body;

[0033] 2, capacitive pen tip; 201, pressure sensor; 202, gyroscope; 203, touch electrode;

[0034] 3, data processing module; 301, signal receiving unit; 302, signal conversion unit; 303, data packaging and transmission unit

[0035] 4, WiFi communication module; 401, wireless communication chip; 402, transmission antenna; 403, microcontroller; 404, switching key;

[0036] 5, storage module; 501, non-volatile memory

[0037] 6. Power module; 601. Rechargeable lithium battery; 602. Power management chip; 603. Low-power control circuit board; 604. Charging port; 605. Indicator light; 606. Power switch;

[0038] 7. Main control chip;

[0039] 10. Signal amplification module; 1001. Signal amplifier; 1002. Ball joint. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1, such as Figures 1-2 As shown, an active capacitive pen supporting WiFi data transmission includes a pen body 1, a pen tip 2, a data processing module 3, a WiFi communication module 4, a storage module 5, a power module 6, and a signal amplification module 10. A main control chip 7 is installed in the middle of the pen body 1. The pen tip 2 is located at the right end of the pen body 1. The pen tip 2 has a touch electrode 203 inside for contacting the screen of a touch device and generating a raw writing signal. The pen tip 2 also includes a pressure sensor 201 and a gyroscope 202. The pressure sensor 201 is electrically connected to one end of the touch electrode 203. The left side of the pressure sensor 201 is also electrically connected to the pressure sensor 202. When a user holds the pen body 1 and touches the pen tip 2 to the screen of a touch device, the touch electrode 203 inside the pen tip 2 contacts the screen and generates a raw writing signal. The pressure sensor 201 inside the pen tip 2 detects the writing pressure in real time and outputs a pressure value signal. The gyroscope 202 detects the tilt angle of the pen and outputs an attitude signal.

[0042] The data processing module 3 is electrically connected to the left side of the capacitive pen nib 2, and the data processing module 3 is internally provided with a data packaging transmission unit 303 for packaging standardized writing data. The data processing module 3 further comprises a signal receiving unit 301 and a signal conversion unit 302. The signal receiving unit 301 is installed inside the capacitive pen body 1, and the signal conversion unit 302 is installed on the left side of the signal receiving unit 301. The data packaging transmission unit 303 is installed outside the signal conversion unit 302. The signal is synchronously transmitted to the signal receiving unit 301. The signal receiving unit 301 converts the original signal into a digital quantity and transmits it to the signal conversion unit 302. The signal conversion unit 302 filters and denoises the data, calibrates the coordinates, generates standardized writing data, and transmits the standardized data to the data packaging transmission unit 303. In combination with the pre-stored device pairing information in the non-volatile memory 501, the standardized data is packaged into a formatted data packet in accordance with the WiFi transmission protocol, which includes device identification, time stamp and data content.

[0043] The WiFi communication module 4 is electrically connected to the left side of the data processing module 3. The capacitive pen body 1 is provided with a switch key 404 electrically connected to a wireless communication chip 401. The WiFi communication module 4 is internally provided with a wireless communication chip 401 for connecting with external devices. The WiFi communication module 4 further comprises a transmission antenna 402 and a microcontroller 403. The transmission antenna 402 is installed inside the capacitive pen body 1, and one end of the transmission antenna 402 is electrically connected to the wireless communication chip 401, and the other end is electrically connected to the signal amplification module 10. The wireless communication chip 401 is installed inside the capacitive pen body 1, and the microcontroller 403 is installed on the wireless communication chip 401. The user presses the switch key 404 to send a manual synchronization instruction to the microcontroller 403 of the WiFi communication module 4. The microcontroller 403 calls the synchronization strategy priority of the main device, the time stamp rule or the user-defined rule in the data packaging transmission unit 303 to determine the current main synchronization device. The WiFi communication module 4 sends a synchronization success instruction to all target devices, and the target device displays the synchronization state. The WiFi communication module 4 sends a synchronization success instruction to all target devices, and the target device displays a state prompt such as synchronization completion or update through the screen. The WiFi communication module 4 supports IEEE802.11 series protocol (including 2.4G / 5G dual frequency), can automatically avoid the occupied 2.4GHz channel, or switch to 5GHz frequency band, and reduce the packet loss rate (the packet loss rate is less than 1% in weak interference environment, and is reduced to less than 3% in strong interference environment);

[0044] The storage module 5 is electrically connected to the left side of the data processing module 3 and located at the left side of the main control chip 7. The storage module 5 is provided with a non-volatile memory 501 for pre-storing device pairing information, synchronization configuration parameters and historical writing data. The non-volatile memory 501 is installed in the body 1 of the capacitive pen, and the non-volatile memory 501 is arranged at the left side of the main control chip 7. After the main control chip 7 is started, the pre-stored device pairing information such as the MAC address and name of the paired device, the synchronization configuration parameters such as the priority rule of the master device, the timestamp rule and the historical writing data index are read from the non-volatile memory 501. The main control chip 7 obtains the state change notification of the master device through the wireless communication chip 401, reads the last synchronization position of the device in the non-volatile memory 501, broadcasts the state synchronization instruction to all target devices, and requires to synchronize the current writing context, which includes the latest coordinates, pressure value and global timestamp.

[0045] The power module 6 is arranged at the left end in the body 1 of the capacitive pen. The power module 6 is internally provided with a low-power control circuit board 603 for reducing standby power consumption. The power module 6 further includes a rechargeable lithium battery 601, a power management chip 602, a charging port 604, an indicator light 605 and an on-off key 606. The low-power control circuit board 603 is installed in the body 1 of the capacitive pen and located at the left side of the storage module 5. The rechargeable lithium battery 601 is installed on the low-power control circuit board 603, and the power management chip 602 is installed on the low-power control circuit board 603 near the right side of the rechargeable lithium battery 601. The charging port 604 is installed on the outer wall of the body 1 of the capacitive pen corresponding to the outer side of the rechargeable lithium battery 601. The indicator light 605 is installed on the outer wall of the body 1 of the capacitive pen corresponding to the outer side of the rechargeable lithium battery 601. The on-off key 606 is installed on the outer wall of the body 1 of the capacitive pen corresponding to the outer side of the rechargeable lithium battery 601. When the user presses the on-off key 606 on the outer wall of the body 1 of the capacitive pen, the rechargeable lithium battery 601 supplies power to each module through the low-power control circuit board 603. The low-power control circuit board 603 enters the low-power mode by default, only maintains the basic circuit operation, and reduces the standby power consumption.

[0046] The signal amplification module 10 is slidably arranged at one end of the body 1 of the capacitive pen and located at the left side of the body 1 of the capacitive pen. The signal amplification module 10 is electrically connected to the WiFi communication module 4. The signal amplification module 10 is internally provided with a signal amplifier 1001 for amplifying signals. The signal amplifier 1001 is slidably installed at one end of the body 1 of the capacitive pen, and one end of the signal amplifier 1001 is provided with a ball head 1002. The signal amplifier 1001 can actively enhance the signal in a weak signal environment, improve the reliability of long-distance transmission, and the data packaging and transmission unit 303 transmits the formatted data packet to the wireless communication chip 401. The wireless communication chip 401 preliminarily emits radio frequency signals through the transmission antenna 402 and the signal amplifier 1001.

[0047] Embodiment two, as shown in Figure 3 A method for active capacitive pen multi-device synchronization supporting WiFi data transmission, comprising the following steps:

[0048] S1, search for devices: scan the WiFi beacon frame in the local area network through the wireless communication chip 401 in cooperation with the signal amplifier 1001, identify the paired target devices that have broadcasted the pairing identifier, and generate a device list containing the device name, MAC address and type;

[0049] S2, synchronize multi-end devices: detect whether there are at least two target devices in the active state in the device list, if yes, trigger the multi-device synchronization process, and the user can send a manual synchronization instruction to the microcontroller 403 in the WiFi communication module 4 by pressing the switch key 404, so that the target device end sends a multi-end synchronization request;

[0050] S3, priority identification: the data encapsulation and transmission unit 303 determines the current master synchronization device based on the pre-stored synchronization strategy in the non-volatile memory 501, including the master device priority, the timestamp rule or the user-defined rule;

[0051] S4, identify the device: the master control chip 7 monitors the running state of each target device in real time, and obtains the state change notification sent by the device through the wireless communication chip 401, when the signal is received through the transmission antenna 402, and any target device state change is detected to be active writing state, the microcontroller 403 reads the last synchronization position of the device from the non-volatile memory 501, and broadcasts the state synchronization instruction to all devices, requiring to synchronize the current writing context.

[0052] From the above, the specific implementation of the present application is as follows: the user presses the key 606 on the outer wall of the capacitive pen body 1, and the rechargeable lithium battery 601 supplies power to each module through the low-power control circuit board 603; the low-power control circuit board 603 enters the low-power mode by default, only maintaining the basic circuit operation, reducing standby power consumption;

[0053] After the master control chip 7 is started, the pre-stored device pairing information is read from the non-volatile memory 501, such as the MAC address and name of the paired device, the synchronization configuration parameters such as the master device priority rule, the timestamp rule and the historical writing data index;

[0054] The user holds the capacitive pen body 1, and contacts the capacitive pen tip 2 with the touch device screen; the touch electrode 203 in the capacitive pen tip 2 contacts the screen to generate an original writing signal; the pressure sensor 201 in the capacitive pen tip 2 detects the writing pressure in real time and outputs a pressure value signal; the gyroscope 202 detects the tilt angle of the capacitive pen and outputs a posture signal; the two signals are synchronously transmitted to the signal receiving unit 301; the signal receiving unit 301 converts the original signal into a digital quantity and transmits it to the signal conversion unit 302; the signal conversion unit 302 filters and denoises the data, calibrates the coordinates, generates standardized writing data, and transmits the standardized data to the data packaging transmission unit 303; the data packaging transmission unit 303 packages the data into a formatted data packet in accordance with the WiFi transmission protocol, including device identification, time stamp and data content, and transmits the formatted data packet to the wireless communication chip 401; the wireless communication chip 401 preliminarily transmits a radio frequency signal through the transmission antenna 402 and the signal amplifier 1001, and combines the radio frequency signal enhancement of the signal amplifier 1001 to balance the transmission rate and coverage range, and adapt to complex electromagnetic environments.

[0055] The user presses the switch key 404 to send a manual synchronization instruction to the microcontroller 403 of the WiFi communication module 4; the microcontroller 403 calls the synchronization strategy in the data packaging transmission unit 303, including the priority of the master device, the time stamp rule or the user-defined rule, to determine the current master synchronization device.

[0056] The master control chip 7 obtains the state change notification of the master device through the wireless communication chip 401, reads the last synchronization position of the device in the non-volatile memory 501, and broadcasts a state synchronization instruction to all target devices to synchronize the current writing context, including the latest coordinates, pressure value and global time stamp.

[0057] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be regarded as the protection scope of the present application, and these will not affect the effect and practicality of the patent. The protection scope claimed in this application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. An active capacitive stylus supporting WiFi data transmission, characterized in that, The application relates to a capacitive pen, which comprises a capacitive pen body (1), a capacitive pen tip (2), a data processing module (3), a WiFi communication module (4), a storage module (5), a power module (6) and a signal amplification module (10). The capacitive pen tip (2) is arranged at the right end of the capacitive pen body (1), and a touch electrode (203) for contacting a touch screen of a touch device and generating original writing signals is arranged in the capacitive pen tip (2). The data processing module (3) is electrically connected to the left side of the capacitive pen tip (2), and a data encapsulation transmission unit (303) for encapsulating standard writing data is arranged in the data processing module (3). The WiFi communication module (4) is electrically connected to the left side of the data processing module (3), and a wireless communication chip (401) for connecting with external devices is arranged in the WiFi communication module (4). A switch key (404) electrically connected with the wireless communication chip (401) is arranged on the outer wall of the capacitive pen body (1). A main control chip (7) is arranged in the middle of the capacitive pen body (1). The storage module (5) is electrically connected to the left side of the data processing module (3) and located at the left side of the main control chip (7). The storage module (5) is provided with a nonvolatile memory (501) for pre-storing device pairing information, synchronization configuration parameters and historical writing data. The power module (6) is arranged at the left end in the capacitive pen body (1), and a low-power consumption control circuit board (603) for reducing standby power consumption is arranged in the power module (6). The signal amplification module (10) is slidably arranged at one end of the capacitive pen body (1), and one end of the signal amplification module (10) is located at the left side of the capacitive pen body (1). The signal amplification module (10) is electrically connected with the WiFi communication module (4), and a signal amplifier (1001) for amplifying signals is arranged in the signal amplification module (10).

2. The active capacitive stylus supporting WiFi data transmission according to claim 1, wherein: The capacitive pen tip (2) further comprises a pressure sensor (201) and a gyroscope (202). The pressure sensor (201) is electrically connected to one end of the touch electrode (203), and a pressure sensor (201) is electrically connected to the left side of the pressure sensor (201).

3. The active capacitive stylus supporting WiFi data transmission according to claim 1, wherein: The data processing module (3) further comprises a signal receiving unit (301) and a signal conversion unit (302). The signal receiving unit (301) is arranged in the capacitive pen body (1), and the signal conversion unit (302) is arranged at the left side of the signal receiving unit (301). The data encapsulation transmission unit (303) is arranged outside the signal conversion unit (302).

4. The active capacitive stylus supporting WiFi data transmission according to claim 1, wherein: The WiFi communication module (4) further comprises a transmission antenna (402) and a microcontroller (403). The transmission antenna (402) is arranged in the capacitive pen body (1), and one end of the transmission antenna (402) is electrically connected with the wireless communication chip (401), and the other end is electrically connected with the signal amplification module (10). The wireless communication chip (401) is arranged in the capacitive pen body (1), and the microcontroller (403) is arranged on the wireless communication chip (401).

5. The active capacitive stylus supporting WiFi data transmission according to claim 1, wherein: The non-volatile memory (501) is installed inside the body (1) of the capacitive pen, and the non-volatile memory (501) is arranged on the left side of the master control chip (7).

6. The active capacitive stylus supporting WiFi data transmission according to claim 1, wherein: The power module (6) further comprises a rechargeable lithium battery (601), a power management chip (602), a charging port (604), an indicator light (605) and an on-off key (606), the low-power consumption control circuit board (603) is installed inside the body (1) of the capacitive pen, and the low-power consumption control circuit board (603) is located on the left side of the storage module (5), the rechargeable lithium battery (601) is installed on the low-power consumption control circuit board (603), the power management chip (602) is installed on the low-power consumption control circuit board (603) close to the right side of the rechargeable lithium battery (601), the charging port (604) is installed on the outer wall of the body (1) of the capacitive pen corresponding to the outside of the rechargeable lithium battery (601), the indicator light (605) is installed on the outer wall of the body (1) of the capacitive pen corresponding to the outside of the rechargeable lithium battery (601), and the on-off key (606) is installed on the outer wall of the body (1) of the capacitive pen corresponding to the outside of the rechargeable lithium battery (601).

7. The active capacitive stylus supporting WiFi data transmission according to claim 1, wherein: The signal amplifier (1001) is slidably installed at one end of the body (1) of the capacitive pen, and one end of the signal amplifier (1001) is provided as a ball head (1002).

8. The active capacitive stylus supporting WiFi data transmission according to claim 1, wherein: The WiFi communication module (4) sends a synchronization success instruction to all target devices, and the target device end displays a synchronization state.

9. The active capacitive stylus supporting WiFi data transmission according to claim 7, wherein: The WiFi communication module (4) supports IEEE802.11 series protocols (including 2.4G / 5G dual frequency).

10. An active capacitive stylus multi-device synchronization method supporting WiFi data transmission, characterized in that, The method comprises the following steps: S1, searching for a device: scanning a WiFi beacon frame in a local area network through the wireless communication chip (401) in cooperation with the signal amplifier (1001), identifying a paired target device having broadcasted a pairing identifier, and generating a device list containing a device name, a MAC address and a type; S2, synchronizing multiple device ends: detecting whether there are at least two target devices in an active state in the device list, if yes, triggering a multi-device synchronization process, and a user can press the switching key (404) to send a manual synchronization instruction to the microcontroller (403) in the WiFi communication module (4), so that the target device end sends a multi-end synchronization request; S3, preferentially identifying: determining a current main synchronization device based on a synchronization strategy including a main device priority, a timestamp rule or a user-defined rule pre-stored in the non-volatile memory (501); S4, identifying a device: monitoring running states of each target device in real time through the master control chip (7), and acquiring a state change notification sent by the device through the wireless communication chip (401), when a signal is received through the transmission antenna (402) and it is detected that a state of any target device is changed to an active writing state, the microcontroller (403) reads a last synchronization position of the device from the non-volatile memory (501), and broadcasts a state synchronization instruction to all devices, requiring to synchronize a current writing context.

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