Electronic pen, screen pen interaction system and control method thereof

Abstract

The invention discloses an electronic pen, a screen pen interaction system and a control method thereof. The system comprises the electronic pen and a tablet provided with a touch screen. The method comprises the steps that a touch screen generates a digital sequence according to a preset rule and sends the digital sequence to an electronic pen; the electronic pen obtains pressure data, generates a pressure data packet according to the pressure data and the received digital sequence, and sends the pressure data packet to the tablet; the touch screen obtains position data, generates a position data packet according to the position data and the digital sequence, and sends the position data packet to the tablet; and the tablet matches the pressure data with the position data according to the received position data packet and pressure data packet to generate complete writing information.

Description

Technical Field

[0001] This application relates to the field of human-computer interaction technology, and in particular to an electronic pen, a screen-pen interaction system, and a control method thereof. Background Technology

[0002] In existing technologies, active capacitive pens typically achieve pen positioning and data transmission by interacting with uplink and downlink signals from the touch panel. Specifically: The touch panel (TP) sends an uplink synchronization signal to the pen via the Tx electrode, and the pen then sends a downlink signal to the touch panel via the Tx. The touch panel calculates the pen's coordinate position based on the received signal. In order to achieve pressure sensitivity, the electronic pen often modulates pressure level information in the downlink signal, and the touch IC demodulates it to obtain the pen pressure data.

[0003] However, the above-mentioned traditional solutions have the following problems: When pressure level information is modulated into the touch link, the touch IC must possess strong demodulation capabilities, increasing circuit complexity and power consumption. With technological advancements, some systems have attempted to transmit position data via the touch link while transmitting pressure-sensitive data through a separate radio frequency (RF) link (such as BLE). However, due to common issues like protocol stack latency and packet loss / retransmission in RF links, pressure data lags behind position data by 50-100ms, making it impossible to guarantee precise correspondence between handwriting thickness and trajectory. This time misalignment between coordinates and pressure sensitivity causes handwriting drift and abrupt changes in thickness, severely impacting the smoothness and naturalness of writing.

[0004] Therefore, existing technologies lack a solution that can accurately synchronize pressure-sensitive data and position data between the touch link and the radio frequency link. Summary of the Invention

[0005] The main objective of this invention is to solve the problems of asynchronous pressure and position data, excessive demodulation burden on touch IC, and unstable RF link transmission in the prior art by using a frame identification mechanism and cross-link synchronization strategy, thereby achieving a low-latency, stable and reliable pressure-coordinate mapping effect.

[0006] To achieve the above objectives, the first aspect of the present invention provides a control method for a screen-pen interaction system, the screen-pen interaction system comprising an electronic pen and a tablet equipped with a touch screen, the electronic pen establishing a radio frequency communication connection with the tablet for sending pressure data packets, and the electronic pen also establishing an electric field coupling connection with the touch screen for receiving digital sequences; the control method includes: The touchscreen generates a digital sequence according to a preset rule and sends the digital sequence to the electronic pen; The electronic pen acquires pressure data, generates a pressure data packet based on the pressure data and the received digital sequence, and sends the pressure data packet to the tablet. The touchscreen acquires location data, generates a location data packet based on the location data and the digital sequence, and sends the location data packet to the tablet; and The tablet matches the pressure data with the location data based on the received location data packet and pressure data packet.

[0007] In one embodiment, the control method further includes: The tablet generates writing information for the electronic pen based on the matched pressure data and position data.

[0008] In one embodiment, the touchscreen generates a number sequence according to a preset rule, including: The touchscreen generates a unique digital sequence in each frame, and the digital sequence is updated in an increasing or decreasing manner, and rolls back to the initial value after reaching a preset maximum value.

[0009] In one embodiment, generating a pressure data packet based on the pressure data and the received digital sequence includes: The electronic pen merges the received digital sequence into the pressure data to generate the pressure data packet.

[0010] In one embodiment, generating a location data packet based on the location data and the digital sequence includes: The touchscreen merges the digital sequence into the location data to generate the location data packet.

[0011] In one embodiment, the matching of pressure data and location data between the flat plate and the received location data packet and pressure data packet includes: After receiving the pressure data packet and the location data packet, the tablet performs a one-to-one matching based on the digital sequence attached to the pressure data packet and the location data packet.

[0012] In one embodiment, the matching of the tablet based on the numerical sequence attached to the pressure data packet and the location data packet further includes: When the tablet detects that the pressure data packet of the current frame is lost, it performs rollback matching on the location data according to the digital sequence of the previous frame.

[0013] The second aspect of the present invention also discloses an electronic pen, the electronic pen comprising a pressure sensor, an uplink signal receiving and parsing module, an electronic pen communication module and an electronic pen main control module; The pressure sensor is used to collect pressure data from the electronic pen. The uplink signal receiving and parsing module establishes an electric field coupling connection with the touch screen to receive uplink signals from the touch screen, parse out the digital sequence in the uplink signal, and transmit the digital sequence to the electronic pen main control module. The electronic pen main control module is electrically connected to the uplink signal receiving and parsing module and the pressure sensor, and is used to merge the digital sequence output by the uplink signal receiving and parsing module with the pressure data to generate a pressure data packet; The electronic pen communication module establishes an radio frequency communication connection with the tablet communication module to send the pressure data packet to the tablet.

[0014] A third aspect of the present invention also discloses a screen-pen interaction system, the screen-pen interaction system comprising: electronic pen; Tablets and touchscreens on the tablets; The tablet also includes a tablet communication module and a tablet main control module; The touch screen includes a display module and a touch module; The electronic pen establishes a radio frequency communication connection with the tablet to send pressure data packets, and the electronic pen also establishes an electric field coupling connection with the touch screen to receive digital sequences. The touch module is used to generate a digital sequence according to a preset rule, modulate it onto an uplink signal, and send it to the electronic pen. The tablet main control module is used to match position data packets from the touch module with pressure data packets from the electronic pen based on digital sequences and generate mapping relationship data. The display module is used to display handwriting based on the mapping relationship data.

[0015] In one embodiment, the present invention also discloses a non-transitory computer-readable storage medium storing a computer program, which, when executed by a processor, performs the control method as described in the first aspect of this application.

[0016] This invention employs dual-link frame synchronization technology, which reduces the pressure on the touch IC while lowering the latency between pressure data and position data. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic flowchart of a control method for a screen-pen interaction system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the system architecture according to another embodiment of the present invention; Figure 3 This is a schematic diagram illustrating an application scenario of another embodiment of the present invention.

[0020] Explanation of icon numbers:

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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. Well-known modules, units, and their connections, links, communications, or operations are not shown or described in detail. Furthermore, the described features, architectures, or functions can be combined in any way in one or more embodiments. Those skilled in the art should understand that the various embodiments described below are only for illustrative purposes and are not intended to limit the scope of protection of the present invention.

[0023] Current technologies typically use a touch link to transmit position data and a separate radio frequency (RF) link (such as BLE) to transmit pressure-sensitive data. However, RF links inevitably suffer from protocol stack latency, packet loss, and retransmission issues, resulting in a 50-100ms lag between the pressure data received by the tablet and the position data at the same time. This prevents precise correspondence between coordinate position and pressure-sensitive data, leading to a mismatch between handwriting thickness and trajectory, impacting writing smoothness and user experience.

[0024] The main solution in this application embodiment is: A cross-link frame synchronization mechanism is introduced between the touch link and the radio frequency link. Specifically, the touch module generates a digital sequence according to preset rules in each frame and modulates this digital sequence into the uplink signal and sends it to the electronic pen. After receiving the digital sequence, the electronic pen merges it into a pressure data packet and sends it to the tablet terminal through the radio frequency link. The touch panel attaches the same digital sequence to the position data packet and sends it to the tablet terminal. Based on the attached digital sequence, the tablet terminal matches and fuses the position data from the touch link and the pressure data from the radio frequency link, thereby achieving accurate synchronization of pressure-sensitive data and position data across links, effectively reducing latency to within one frame and improving the writing experience.

[0025] Explanation of some technical terms in this invention: A digital sequence refers to the identification information generated by the touch module in each frame according to preset rules, used to identify the position data and corresponding pressure data of that frame. The digital sequence can be updated using incrementing, decrementing, or cyclical wrapping methods, and possesses uniqueness or temporal continuity. By simultaneously carrying the same digital sequence in both the position data packet and the pressure data packet, cross-link data correspondence and synchronization can be achieved.

[0026] An uplink signal refers to a signal sent from the touchscreen to the electronic pen for information transmission. In this invention, the uplink signal is modulated with a digital sequence, which the electronic pen acquires by receiving the uplink signal. The uplink signal is generated based on a touch protocol and is related to the communication between the electronic pen and the touchscreen.

[0027] Mapping data refers to the data set formed by the tablet after receiving position data packets and pressure data packets, based on the corresponding digital sequences attached to both, reflecting the one-to-one correspondence between coordinate points and pressure values. This data is used to recover complete writing information, including handwriting trajectory and stroke thickness.

[0028] A tablet communication module refers to a functional unit used for data transmission and reception. In this invention, the tablet communication module establishes an radio frequency communication connection with the electronic pen, receives and demodulates the radio frequency signals from the electronic pen, thereby extracting pressure data packets and transmitting them to the tablet's main control module.

[0029] The touch module refers to the functional unit integrated into the touch screen, including a position sensing unit, a sequence generation unit, and a touch processing unit. The position sensing unit is used to collect position data, the sequence generation unit is used to generate digital sequences, and the touch processing unit is used to combine the position data and the digital sequences to form a position data packet, and modulate the digital sequence into an uplink signal to send it to the electronic pen.

[0030] Electric field coupling refers to a non-contact coupling method that transmits signals through changes in a spatial electric field. Specifically, the touchscreen's transmitting electrode generates an electric field signal modulated with a digital sequence under the drive of the touch IC. The pen tip electrode, located within the range of this electric field, senses the signal through capacitance, and the digital sequence is then analyzed by a front-end amplification and demodulation module. This connection method eliminates the need for wire connections or radio frequency protocol communication; instead, it relies on the near-field coupling effect of the electric field for signal interaction, enabling synchronous control and data recognition between the touchscreen and the pen.

[0031] A location data packet is a data packet generated by the touch module that contains location data information and a corresponding numerical sequence. After being sent to the tablet, this data packet is used to correspond with the pressure data packet based on the numerical sequence.

[0032] A pressure data packet is a data packet generated by the electronic pen based on the collected pressure data and the received digital sequence. The pressure data packet is transmitted to the tablet via an radio frequency link for matching with the location data packet.

[0033] The electronic pen communication module refers to the communication unit set in the electronic pen, which is used to receive uplink signals from the touch screen, obtain the digital sequence therein, establish a radio frequency communication connection with the tablet, and send pressure data packets containing pressure data and digital sequences to the tablet.

[0034] The main control module of a tablet refers to the processor or microcontroller unit set in the tablet. It is used to receive position data packets and pressure data packets, match them based on digital sequences to form mapping relationship data, and transmit the results to the display module for output.

[0035] The display module refers to the display component on a flat panel, such as a liquid crystal display or an organic light-emitting diode display, used to display complete handwriting based on a mapping relationship.

[0036] A touchscreen is an integrated input and display component located on a tablet, comprising a display module and a touch module. The touch module is responsible for capturing touch positions and generating digital sequences, while the display module is responsible for displaying handwriting or images.

[0037] A tablet refers to a smart terminal device that includes a touch screen, a tablet main control module, and a tablet communication module, used to execute the control method of the embodiments of the present invention.

[0038] A pressure sensor is a sensor installed in an electronic pen to detect the pressure applied to the pen tip and output a corresponding electrical signal to generate pressure data.

[0039] Reference Figure 1 In one embodiment of the present invention, the control method of the screen-pen interaction system includes steps S100-S400, wherein: The screen-pen interaction system includes a smart terminal and an electronic pen. The smart terminal is a tablet with a touch screen. The touch screen includes a display module and a touch module. The touch module further includes a position sensing unit, a sequence generation unit, and a touch processing unit.

[0040] In step S100, the touchscreen generates a digital sequence according to preset rules and sends the digital sequence to the electronic pen. Specifically, within each touch frame cycle, the touchscreen generates a unique digital sequence by its internal sequence generation unit. The digital sequence can be updated according to an increasing, decreasing, or other deterministic pattern. When the digital sequence reaches a preset upper limit value, it can automatically roll back to the initial value to achieve cyclic identification. The generated digital sequence is modulated into an uplink signal by the touch module and sent to the electronic pen through the touch communication link (Uplink).

[0041] In step S200, after receiving the uplink signal, the electronic pen parses the digital sequence through its built-in electronic pen communication module and caches it in the local main control module. The pressure sensor inside the electronic pen is used to collect pressure data generated by the pen tip on the touchscreen surface in real time. The electronic pen main control module merges the collected pressure data with the digital sequence to generate a pressure data packet containing frame identification information, and sends it to the tablet via a radio frequency communication link (including but not limited to Bluetooth BLE).

[0042] In step S300, the touchscreen is also responsible for collecting touch point position data. When the touch module detects pen tip contact or movement, it generates corresponding coordinate information. The touch module binds this position data with the aforementioned digital sequence to form a position data packet, which is then transmitted to the tablet's main control module via the tablet's internal bus.

[0043] In step S400, after receiving the pressure data packet from the electronic pen and the position data packet from the touch screen, the tablet's main control module matches the digital sequences carried by both, fusing the pressure data and position data corresponding to the same frame number to form mapping relationship data. This mapping relationship data can be further used by the display module to realize real-time drawing of handwriting lines, making the writing trajectory completely synchronized with pressure sensitivity changes. Furthermore, in another embodiment of the present invention, after the tablet's main control module generates the mapping relationship data based on the position data packet and the pressure data packet, the tablet sends the mapping relationship data to the touch screen through a bus interface, including but not limited to I²C, SPI, or USB interfaces. The mapping relationship data contains a one-to-one correspondence between coordinate points and corresponding pressure values, which can be represented as the handwriting trajectory and its thickness variations.

[0044] After receiving the mapping data, the touch processing unit of the touchscreen transmits the data to the display module. The display module refreshes the display area in real time according to the mapping data to draw the handwriting corresponding to the user's writing action. Specifically, the coordinate information in the mapping data is used to determine the path of the handwriting, and the pressure information is used to adjust the thickness or darkness of the handwriting, so that the final displayed handwriting is consistent with the actual writing effect.

[0045] Furthermore, the mapping data also includes the following: after receiving the position data packet from the touchscreen and the pressure data packet from the electronic pen, the tablet's main control module first reads the numerical sequence attached to both types of data packets. Since each frame has a unique numerical sequence, the tablet's main control module can perform a one-to-one matching of the two types of data based on the numerical sequence field. For example, when both the position data packet and the pressure data packet are accompanied by the sequence number "120", the tablet's main control module can combine the coordinate point of that frame with the corresponding pressure value to form complete mapping data.

[0046] In practical applications, the radio frequency link may experience delays or packet loss, causing some pressure data packets to fail to arrive on time. To address this, the tablet's main control module in this embodiment incorporates a fault-tolerant strategy: when a missing pressure data packet is detected, the main control module uses the digital sequence of the previous frame as a reference to match the position data of the current frame, essentially performing a rollback matching operation. This method ensures the continuity of position data even when pressure data is missing, preventing noticeable breaks in the handwriting trajectory.

[0047] Furthermore, in the event of missing pressure data across multiple consecutive frames, the tablet's main control module can employ an interpolation algorithm to estimate the missing pressure values, thereby maintaining the smoothness of variations in pen stroke thickness. Finally, the tablet's main control module stores or transmits the resulting mapping relationship data to the display module for real-time pen stroke rendering.

[0048] In one embodiment of the present invention, the formation of the location data packet includes: specifically, the touch screen generates a unique digital sequence by a sequence generation unit in each frame period. This digital sequence can be updated in an incrementing or decrementing manner, for example, incrementing in the range of 0 to 255, and automatically reverting to the initial value of 0 when it reaches a preset maximum value of 255, thereby ensuring the continuity and cyclicity of the sequence. In this way, each frame is accompanied by a unique identifier, avoiding cross-frame data confusion.

[0049] When the position signal acquisition unit of the touch module detects the touch position of the electronic pen, the touch processing unit combines the acquired position data with the digital sequence and packages them as a whole to form a position data packet. The position data packet includes at least the following fields: Coordinate information fields (e.g., X and Y coordinate values); The numeric sequence field (i.e., the frame identifier updated by incrementing / decrementing as described above); Optional control fields (such as contact status, valid flags).

[0050] Subsequently, the location data packet is transmitted to the tablet's main control module via the bus interface. Upon receiving the packet, the tablet can use a digital sequence field as a unique identifier to accurately match the frame's location data with the corresponding pressure data, thereby achieving frame-level synchronization of the handwriting.

[0051] Optionally, refer to Figure 2 and Figure 3 Another embodiment of the present invention provides a smart terminal based on the above. Figure 1 The embodiment shown, The smart terminal includes a tablet and a touch screen set on the tablet.

[0052] The tablet includes a tablet communication module and a tablet main control module. The tablet communication module enables communication and interaction with the electronic pen, establishing a radio frequency communication connection and receiving pressure data packets sent by the electronic pen. The tablet main control module receives position data packets transmitted from the touchscreen and matches the position data packets with the pressure data packets based on a digital sequence to form a mapping relationship. The tablet main control module can also transmit the mapping relationship data to the display module for drawing handwriting.

[0053] The touchscreen includes a display module and a touch module. The display module can be a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display, used to display the user's writing trajectory based on a mapping relationship. The touch module further includes a sequence generation unit, a position sensing unit, and a touch processing unit, wherein: The sequence generation unit is used to generate a number sequence according to preset rules and to continuously update the number sequence; The touch processing unit modulates the digital sequence into an uplink signal and sends the uplink signal to the electronic pen via an electric field coupling link. The position sensing unit is used to collect touch position data and combine it with digital sequence to form position data packet, which is then sent to the tablet main control module.

[0054] In use, the touch module generates a unique digital sequence in each frame period and sends an uplink signal containing the digital sequence to the electronic pen via an electric field coupling link. Upon receiving the digital sequence, the electronic pen combines it with pressure data to form a pressure data packet, which is then sent to the tablet's communication module via an radio frequency link. Simultaneously, the touch module packages position data carrying the digital sequence into a position data packet and sends it to the tablet's main control module. Upon receiving the position and pressure data packets, the tablet's main control module performs a matching operation using the digital sequences to generate a mapping relationship. The display module then displays the handwriting based on this mapping relationship, achieving precise synchronization between writing position and pressure information.

[0055] In another embodiment of the present invention, the touch module includes a position sensing unit, a sequence generation unit, and a touch processing unit.

[0056] The position sensing unit is used to collect position data of the electronic pen on the touch screen, such as the coordinates (X, Y) of the contact point of the electronic pen on the touch screen surface. The position sensing unit can be implemented based on capacitance detection, resistance detection, or optical detection methods, and transmits the collected position data to the touch processing unit in real time.

[0057] The sequence generation unit generates a digital sequence according to preset rules, such as updating it incrementally or decrementally in each frame cycle, and wrapping back to the initial value when the maximum value is reached, thereby ensuring that each frame is accompanied by a unique identifier. This digital sequence is then sent to the touch processing unit for combination with location data.

[0058] The touch processing unit receives position data from the position sensing unit and a digital sequence from the sequence generation unit, merges them, and packages them into a position data packet. The position data packet includes at least a coordinate information field and a digital sequence field. The touch processing unit sends the position data packet to the tablet's main control module for matching with the pressure data packet.

[0059] Furthermore, the touch processing unit also modulates the digital sequence into an uplink signal, enabling the uplink signal to carry the digital sequence and transmit it to the electronic pen based on the electric field coupling connection. The electronic pen can obtain the digital sequence by receiving the uplink signal and attach the same digital sequence when generating pressure data packets, thus achieving cross-link correspondence.

[0060] On the other hand, the tablet communication module establishes a radio frequency (RF) communication connection with the electronic pen, for example, based on the Bluetooth Low Energy (BLE) protocol or other 2.4GHz RF protocols. The electronic pen combines the pressure data with the received digital sequence to form a pressure data packet, and sends it to the tablet communication module via the RF link. After receiving the RF signal, the tablet communication module demodulates and parses it to extract the pressure data packet.

[0061] After extracting the pressure data packet, the tablet communication module transmits it to the tablet's main control module. The main control module then matches the pressure data packet with the position data packet transmitted by the touch module to generate mapping data.

[0062] In another embodiment of the present invention, a control method for an electronic pen is provided, comprising establishing an electric field coupling connection between the electronic pen's communication module and a touch screen for receiving uplink signals sent by the touch screen. The uplink signal is modulated with a digital sequence generated according to a preset rule, such as an incrementing or decrementing frame identifier. After receiving the uplink signal, the electronic pen parses the digital sequence from it for subsequent combination with pressure data.

[0063] Subsequently, the electronic pen's pressure sensor collects the pressure information of the pen tip on the touchscreen surface and converts the pressure signal into an electrical signal. The electronic pen's main control module processes this electrical signal to generate pressure data.

[0064] After generating the pressure data, the main control module of the electronic pen identifies the pressure data based on the numerical sequence, that is, by attaching the same numerical sequence to the pressure data, forming a pressure data packet. The pressure data packet includes at least a pressure value field and a numerical sequence field to ensure that it can establish a correspondence with the position data packet uploaded by the touch screen on the tablet.

[0065] Finally, the pressure data packet is transmitted to the tablet terminal via an RF link through the electronic pen's communication module. This RF link can use the Bluetooth Low Energy (BLE) protocol or other short-range wireless communication protocols. After receiving the pressure data packet, the tablet performs digital sequence matching with the position data packet uploaded to the touchscreen to form a mapping relationship, thereby achieving synchronization between the handwriting trajectory and pressure-sensitive information.

[0066] Using the above method, the electronic pen can bind pressure data with the digital sequence generated by the touch screen and transmit it to the tablet without changing the existing communication protocol. This enables the tablet to achieve accurate matching of cross-link data and solves the problem of asynchronous coordinates and pressure caused by radio frequency transmission delay in the existing technology.

[0067] Optionally, another embodiment of the present invention provides an electronic pen, including an electronic pen body, wherein a pressure sensor, an electronic pen communication module and an electronic pen main control module are disposed inside the electronic pen body.

[0068] The pressure sensor is installed at the tip of the electronic pen to detect the amount of pressure applied by the user during writing or drawing. The pressure sensor can be a strain gauge, piezoelectric, or capacitive sensor, and its output is an electrical signal proportional to the pressure applied.

[0069] The electronic pen establishes two types of communication connections: one is a touch protocol connection with the touchscreen to receive the digital sequence carried in the uplink signal from the touchscreen; the other is a radio frequency communication connection with the tablet, such as Bluetooth Low Energy (BLE) or other 2.4GHz wireless communication protocols, to send pressure data packets to the tablet. The communication module can modulate and demodulate the radio frequency signal to ensure the stability of data transmission.

[0070] The electronic pen main control module is electrically connected to the pressure sensor and the electronic pen communication module, and is used to process and control the core functions of the electronic pen. Specifically, the electronic pen main control module receives electrical signals from the pressure sensor, performs analog-to-digital conversion and filtering on them to obtain pressure data. At the same time, the electronic pen main control module extracts digital sequences from the received uplink signals and merges these digital sequences with the pressure data to form a pressure data packet containing a frame identifier.

[0071] After the pressure data packet is generated, the electronic pen main control module sends the pressure data packet to the tablet via the electronic pen communication module. Upon receiving the pressure data packet, the tablet can match the numerical sequence within it with the location data packet uploaded to the touchscreen, thereby achieving cross-link data synchronization and fusion, and restoring the complete handwriting trajectory and thickness variations.

[0072] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for a screen-pen interaction system, characterized in that, The screen-pen interaction system includes an electronic pen and a tablet equipped with a touchscreen. The electronic pen establishes a radio frequency communication connection with the tablet for sending pressure data packets, and also establishes an electric field coupling connection with the touchscreen for receiving digital sequences. The control method includes: The touchscreen generates a digital sequence according to a preset rule and sends the digital sequence to the electronic pen; The electronic pen acquires pressure data, generates a pressure data packet based on the pressure data and the received digital sequence, and sends the pressure data packet to the tablet. The touchscreen acquires location data, generates a location data packet based on the location data and the digital sequence, and sends the location data packet to the tablet; and The tablet matches the pressure data with the location data based on the received location data packet and pressure data packet.

2. The control method for the screen-pen interaction system as described in claim 1, characterized in that, The control method further includes: The tablet generates writing information for the electronic pen based on the matched pressure data and position data.

3. The control method for the screen-pen interaction system as described in claim 1, characterized in that, The touchscreen generates a digital sequence according to preset rules, including: The touchscreen generates a unique digital sequence in each frame, and the digital sequence is updated in an increasing or decreasing manner, and rolls back to the initial value after reaching a preset maximum value.

4. The control method for the screen-pen interaction system as described in claim 1, characterized in that, The step of generating a pressure data packet based on the pressure data and the received digital sequence includes: The electronic pen merges the received digital sequence into the pressure data to generate the pressure data packet.

5. The control method for the screen-pen interaction system as described in claim 1, characterized in that, The step of generating a location data packet based on the location data and the digital sequence includes: The touchscreen merges the digital sequence into the location data to generate the location data packet.

6. The control method for the screen-pen interaction system as described in any one of claims 1 to 5, characterized in that, The matching of pressure data and location data by the flat plate based on the received location data packet and pressure data packet includes: After receiving the pressure data packet and the location data packet, the tablet performs a one-to-one matching based on the digital sequence attached to the pressure data packet and the location data packet.

7. The control method for the screen-pen interaction system as described in claim 6, characterized in that, The matching of the tablet based on the numerical sequence attached to the pressure data packet and the location data packet also includes: When the tablet detects that the pressure data packet of the current frame is lost, it performs rollback matching on the location data according to the digital sequence of the previous frame.

8. An electronic pen, characterized in that, The electronic pen includes a pressure sensor, an uplink signal receiving and parsing module, an electronic pen communication module, and an electronic pen main control module; The pressure sensor is used to collect pressure data from the electronic pen. The uplink signal receiving and parsing module establishes an electric field coupling connection with the touch screen to receive uplink signals from the touch screen, parse out the digital sequence in the uplink signal, and transmit the digital sequence to the electronic pen main control module. The electronic pen main control module is electrically connected to the uplink signal receiving and parsing module and the pressure sensor, and is used to merge the digital sequence output by the uplink signal receiving and parsing module with the pressure data to generate a pressure data packet; The electronic pen communication module establishes an radio frequency communication connection with the tablet communication module to send the pressure data packet to the tablet.

9. A screen-pen interaction system, characterized in that, The screen-pen interaction system includes: electronic pen; Tablets and touchscreens on the tablets; The tablet also includes a tablet communication module and a tablet main control module; The touch screen includes a display module and a touch module; The electronic pen establishes a radio frequency communication connection with the tablet to send pressure data packets, and the electronic pen also establishes an electric field coupling connection with the touch screen to receive digital sequences. The touch module is used to generate a digital sequence according to a preset rule, modulate it onto an uplink signal, and send it to the electronic pen. The tablet main control module is used to match position data packets from the touch module with pressure data packets from the electronic pen based on digital sequences and generate mapping relationship data. The display module is used to display handwriting based on the mapping relationship data.

10. A non-transitory computer-readable storage medium, characterized in that, The system contains a computer program that, when executed by a processor, is used to perform the control method as described in any one of claims 1 to 7.

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