Electronic handwriting board, control method and readable storage medium

Abstract

The invention discloses an electronic handwriting board, a control method and a computer readable storage medium, the electronic handwriting board comprises a control module and a handwriting board main body, and the handwriting board main body comprises a bistable liquid crystal layer, a shielding layer and a touch sensing layer which are stacked in sequence; the bistable liquid crystal layer is used for detecting and presenting a touch track to execute a handwriting board function; the control module is connected with the touch sensing layer and is used for detecting a touch track through the touch sensing layer to obtain touch track information and storing the touch track information; the shielding layer is used for shielding interference signals generated when the touch sensing layer works. Therefore, according to the technical scheme, the content presented in the electronic handwriting board can be conveniently stored, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to an electronic handwriting tablet, a control method, and a computer-readable storage medium. Background Technology

[0002] Electronic writing tablets using bistable liquid crystal technology are widely used in various scenarios such as children's drawing boards, classroom draft notebooks, meeting signature boards, and cleanroom environment notebooks due to their long battery life, instant writing and display, portability, durability, and low price.

[0003] When users need to record or save the content displayed on the aforementioned electronic handwriting tablet, they can usually only take photos with their mobile phones or transcribe them onto paper or other storable electronic documents. Therefore, existing electronic handwriting tablets are inconvenient for recording or saving their displayed content. Thus, how to conveniently save the content displayed on an electronic handwriting tablet is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide an electronic handwriting tablet, a control method, and a computer-readable storage medium that enables convenient saving of the content displayed on the electronic handwriting tablet.

[0005] To achieve the above objectives: In a first aspect, embodiments of this application provide an electronic handwriting tablet, including: a control module and a handwriting tablet body. The handwriting tablet body includes a bistable liquid crystal layer, a shielding layer, and a touch sensing layer stacked sequentially. The bistable liquid crystal layer is used to detect and display touch trajectories to perform handwriting tablet functions. The control module is connected to the touch sensing layer and is used to detect touch trajectories through the touch sensing layer to obtain touch trajectory information and store touch trajectory information. The shielding layer is used to shield interference signals generated when the touch sensing layer is working.

[0006] In one embodiment, the touch sensing layer has light-transmitting properties and flexibility; and / or, the shielding layer has light-transmitting properties and flexibility.

[0007] In one embodiment, the control module is also connected to the bistable liquid crystal layer; the control module is also used to output a reset signal to the bistable liquid crystal layer to clear the touch trajectory presented by the bistable liquid crystal layer, and at the same time store the touch trajectory information.

[0008] In one embodiment, the control module includes a first control unit, a switch assembly, a second control unit, and a reset switch assembly. The first control unit is connected to the touch sensing layer and is used to detect touch traces through the touch sensing layer during operation to obtain touch trace information and store the touch trace information. The switch assembly is connected to the first control unit and is used to control the first control unit to work or stop working. The second control unit is connected to the bistable liquid crystal layer and the reset switch assembly and is used to trigger and output a reset signal to the bistable liquid crystal layer through the reset switch assembly to clear the touch traces presented by the bistable liquid crystal layer.

[0009] In one embodiment, the first control unit includes a control chip, an image processing subunit, a storage subunit, and a communication subunit. The control chip is connected to the touch sensing layer and is used to send the touch coordinate information corresponding to the touch trajectory to the image processing subunit when the touch trajectory is sensed by the touch sensing layer. The image processing subunit is also connected to the second control unit and is used to generate and transmit touch trajectory information in image format to the storage subunit based on the acquired touch coordinate information when a reset signal triggered by the second control unit is received, so that the storage subunit stores the touch trajectory information. The communication subunit is connected to the storage subunit and is used to establish a communication connection with an external device and send the touch trajectory information stored in the storage subunit to the external device.

[0010] Secondly, embodiments of this application provide a control method applicable to any of the electronic handwriting tablets described above. The control method includes the following steps: S1: controlling the handwriting tablet body of the electronic handwriting tablet to detect touch trajectory, wherein the bistable liquid crystal layer included in the handwriting tablet body is used to present the touch trajectory in real time; S2: acquiring and storing touch trajectory information based on the touch trajectory.

[0011] In one embodiment, step S2 includes: in response to the triggering of a reset signal, acquiring and storing touch trajectory information based on the touch trajectory, and controlling the bistable liquid crystal layer to clear the presented touch trajectory.

[0012] In one embodiment, after step S2, the method includes: sending the stored touch trajectory information to an external device that has established a communication connection with the electronic writing tablet.

[0013] In one embodiment, the reset signal is triggered in at least one of the following ways: Operate the reset switch assembly in the electronic writing tablet; The preset content is identified based on the touch trajectory. The preset content is used to map and trigger the generation instruction of the reset signal.

[0014] In one embodiment, acquiring and storing touch trajectory information based on the touch trajectory includes: acquiring touch trajectory information in image format based on the touch trajectory; identifying preset content in the touch trajectory information and eliminating the preset content in the touch trajectory information to update the touch trajectory information; and storing the updated touch trajectory information.

[0015] Thirdly, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements any of the control methods described above.

[0016] The electronic writing tablet, control method, and computer-readable storage medium provided in this application embodiment include: an electronic writing tablet comprising a control module and a writing tablet body. The writing tablet body includes a bistable liquid crystal layer, a shielding layer, and a touch sensing layer stacked sequentially. The bistable liquid crystal layer is used to detect and display touch trajectories to execute the writing tablet function. The control module is connected to the touch sensing layer and is used to detect touch trajectories through the touch sensing layer to obtain touch trajectory information and to store the touch trajectory information. The shielding layer is used to shield interference signals generated when the touch sensing layer is working. Thus, in the technical solution of this application, the electronic writing tablet has a touch sensing layer configured on the side of the bistable liquid crystal layer that supports the writing tablet function, and a shielding layer configured between the bistable liquid crystal layer and the touch sensing layer. Therefore, when the user performs a touch action on the electronic writing tablet, the bistable liquid crystal layer can display the touch trajectory corresponding to the touch action, and the touch sensing layer can detect the touch trajectory and cause the electronic writing tablet to generate and store the corresponding touch trajectory information. The shielding layer can prevent the touch sensing layer from interfering with the bistable liquid crystal layer when it is working. Therefore, the technical solution of this application can conveniently save the content presented in the electronic handwriting tablet and improve the user experience. 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. To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the electronic handwriting tablet body provided in the first embodiment of this application.

[0019] Figure 2 This is a flowchart illustrating the control method for an electronic handwriting tablet provided in the second embodiment of this application.

[0020] Figure 3This is a structural diagram of the core component of the electronic handwriting tablet in this application example.

[0021] Figure 4 This is a flowchart illustrating the control method for an electronic handwriting tablet as exemplified in this application.

[0022] Figure 5 This is a schematic diagram of the control module in the electronic handwriting tablet of this application example.

[0023] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0025] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0026] It should be understood that although the terms first, second, third, etc., may be used herein to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this document, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if," as used herein, can be interpreted as "when," "when," or "in response to determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising," "including," indicate the presence of the stated feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are to be interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C". Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0027] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0028] It should be noted that step designations such as S1 and S2 are used in this document for the purpose of more clearly and concisely describing the corresponding content, and do not constitute a substantial limitation on the order. In specific implementation, those skilled in the art may execute S2 first and then S1, etc., but these should all be within the protection scope of this application.

[0029] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0030] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0031] First Embodiment See Figure 1 The first embodiment of this application (hereinafter referred to as "this embodiment") provides an electronic handwriting tablet, including: a control module and a handwriting tablet body. The handwriting tablet body includes a bistable liquid crystal layer 102, a shielding layer 103 and a touch sensing layer 104 stacked in sequence.

[0032] The bistable liquid crystal layer 102 is used to detect and display touch trajectories to perform handwriting tablet functions.

[0033] In one embodiment, the bistable liquid crystal layer 102 can be referred to as a cholesteric liquid crystal panel or a cholesteric liquid crystal layer. The bistable liquid crystal layer 102 can be formed by adding an optical rotator to a nematic liquid crystal, giving it a helical arrangement structure. Its molecular arrangement has the following three main states: Planar State (P-state): Liquid crystal molecules are arranged in a helical pattern, with the helical axis parallel to the screen surface. In this state, the liquid crystal can reflect light of a specific wavelength (according to the Bragg reflection principle, the reflected wavelength is related to the helical pitch and birefringence), causing the writing area to display color; Focal Conic State (FC State): The helical structure of liquid crystal molecules is relatively disordered. Most of the incident light passes through, and a small part is scattered. At this time, the writing area appears as a semi-transparent and semi-scattered light milky white state. Homeotropic State (H-state): The long axis of the liquid crystal molecules is aligned perpendicular to the screen surface, allowing light to pass through completely, and the writing area appears transparent.

[0034] Understandably, both the P-state and the FC-state are stable states. Even after the external force or driving voltage disappears, the liquid crystal molecules can still maintain this state, which is the key to achieving bistable properties.

[0035] Understandably, the bistable liquid crystal layer 102 is used to detect and display touch traces to perform the handwriting tablet function. (1) Handwriting process: When a user touches the main body of the handwriting tablet with a stylus or finger, the pressure is transmitted to the bistable liquid crystal layer 102. The pressure causes the arrangement of liquid crystal molecules in the bistable liquid crystal layer 102 to change from the initial FC state (displaying the background color, such as the color of the substrate 101 in the main body of the handwriting tablet) to the P state. Since the liquid crystal molecules reflect light of a specific wavelength in the P state, the corresponding color can be displayed on the handwriting tablet, thus presenting the touch trajectory corresponding to the stylus or finger. The thickness of the touch trajectory can be determined by the magnitude of the touch pressure. The greater the pressure, the more liquid crystal molecules are twisted, and the thicker the trajectory. (2) Clearing process: The control module can apply voltage (i.e., reset signal) to the bistable liquid crystal layer 102. The voltage stimulation causes the liquid crystal molecules to recover from the P state to the FC state or H state. At this time, the characteristics of the reflected light change, the touch track disappears, and the handwriting tablet body returns to the initial blank state.

[0036] The control module is connected to the touch sensing layer 104 and is used to detect touch trajectory through the touch sensing layer 104 to obtain touch trajectory information and to store touch trajectory information.

[0037] In one embodiment, the touch sensing layer 104 can employ capacitive touch technology or other touch technologies (such as resistive touch technology, infrared touch technology, etc.). Capacitive touch technology can include mutual capacitive architecture and self-capacitive architecture. Optionally, this embodiment employs a self-capacitive architecture, which has a simpler manufacturing process and lower power consumption compared to the mutual capacitive architecture.

[0038] In one embodiment, the control module periodically reads the sensing signals of the touch sensing layer 104, uses a differential detection method to record the initial capacitance value (baseline value when not touched) of each touch point, and records the change in capacitance value after touch. By comparing the difference between the two values, the touch position can be determined, and thus the touch trajectory can be detected. The touch trajectory can represent a set of one or more detected touch positions, and each touch position can be assigned coordinates and a timestamp.

[0039] In one embodiment, the touch trajectory information is information that can characterize the touch trajectory and can be stored or processed by a computer.

[0040] In one embodiment, the touch trajectory information can be stored in a local storage sub-unit of the electronic writing tablet, and / or in an external device (such as a mobile phone, cloud server, etc.) that establishes a communication connection with the electronic writing tablet.

[0041] The shielding layer 103 is used to shield the interference signals generated when the touch sensing layer 104 is working.

[0042] In one embodiment, the shielding layer 103 can be an insulating material. Optionally, depending on the direction the electronic writing tablet faces when the user operates it, if the touch sensing layer 104 is located above the bistable liquid crystal layer 102, the shielding layer 103 can be an insulating material with light-transmitting properties (e.g., a transparent insulating material), and the touch sensing layer 104 can also be light-transmitting to avoid obstructing the bistable liquid crystal layer 102 from displaying touch traces. Optionally, depending on the direction the electronic writing tablet faces when the user operates it, if the touch sensing layer 104 is located below the bistable liquid crystal layer 102, the shielding layer 103 can be a flexible insulating material (e.g., a transparent insulating material), and the touch sensing layer 104 can be a sensing layer using resistive touch technology.

[0043] In one embodiment, depending on the direction the user is facing when operating the electronic writing tablet, if the touch sensing layer 104 is located above the bistable liquid crystal layer 102, in order to better ensure that the user's touch pressure is transmitted to the bistable liquid crystal layer 102 and to better ensure the presentation effect of the bistable liquid crystal layer 102 on the touch trajectory, the shielding layer 103 may have light-transmitting properties and flexibility (e.g., a transparent flexible insulating material), and the touch sensing layer 104 may have light-transmitting properties and flexibility.

[0044] In one embodiment, the shielding layer 103 includes, but is not limited to, at least one of OC material (optically transparent composite material), non-conductive adhesive, etc.

[0045] In one embodiment, the handwriting tablet body may further include a substrate 101. The substrate 101 is used to support the bistable liquid crystal layer 102, the shielding layer 103, and the touch sensing layer 104.

[0046] The handwriting tablet body provided in this embodiment includes a bistable liquid crystal layer 102, a shielding layer 103, and a touch sensing layer 104 stacked sequentially. The bistable liquid crystal layer 102 is used to detect and display touch trajectories to perform handwriting tablet functions. The control module is connected to the touch sensing layer 104 and is used to detect touch trajectories through the touch sensing layer 104 to obtain touch trajectory information and store touch trajectory information. The shielding layer 103 is used to shield interference signals generated when the touch sensing layer 104 is working. Thus, in this embodiment, the electronic writing tablet has a touch sensing layer 104 disposed on one side of the bistable liquid crystal layer 102 that supports the writing tablet function, and a shielding layer 103 disposed between the bistable liquid crystal layer 102 and the touch sensing layer 104. When the user performs a touch action on the electronic writing tablet, the bistable liquid crystal layer 102 can display the touch trajectory corresponding to the touch action, and the touch sensing layer 104 can detect the touch trajectory and cause the electronic writing tablet to generate and store the corresponding touch trajectory information. The shielding layer 103 can prevent the touch sensing layer 104 from interfering with the bistable liquid crystal layer 102 when it is working. Therefore, the technical solution of this embodiment can conveniently save the content displayed on the electronic writing tablet, improving the user experience.

[0047] In one embodiment, the control module is also connected to the bistable liquid crystal layer 102; the control module is also used to output a reset signal to the bistable liquid crystal layer 102 to clear the touch traces presented by the bistable liquid crystal layer 102, and simultaneously store the touch trace information. Thus, the technical solution of this embodiment can configure the control functions of the bistable liquid crystal layer 102 and the touch sensing layer 104 in the same control module, thereby improving the integration of the internal circuitry of the electronic writing tablet. Therefore, the control module can also output a reset signal to the bistable liquid crystal layer 102 to clear the touch traces presented by the bistable liquid crystal layer 102 so that the electronic writing tablet can be reused. Furthermore, the control module in this embodiment can control the clearing of the touch traces presented by the bistable liquid crystal layer 102 while simultaneously controlling the storage of touch trace information, improving the collaborative operation of multiple modules.

[0048] In one embodiment, the control module includes a first control unit, a switch assembly, a second control unit, and a reset switch assembly. The first control unit is connected to the touch sensing layer 104 and is used to detect touch traces through the touch sensing layer 104 to obtain touch trace information and store the touch trace information during operation. The switch assembly is connected to the first control unit and is used to control the first control unit to work or stop working. The second control unit is connected to the bistable liquid crystal layer 102 and the reset switch assembly and is used to trigger and output a reset signal to the bistable liquid crystal layer 102 through the reset switch assembly to clear the touch traces presented by the bistable liquid crystal layer 102. Thus, the technical solution of this embodiment can be configured with two physical switches; one physical switch (switch assembly) can be used to control the first control unit to work to enable the touch sensing layer 104 to detect touch traces, or to control the first control unit to stop working so that the touch sensing layer 104 stops detecting touch traces; the other physical switch (reset switch assembly) is used to control the second control unit to trigger and output a reset signal to the bistable liquid crystal layer 102 to clear the touch traces presented by the bistable liquid crystal layer 102. Furthermore, in this embodiment, the electronic handwriting tablet achieves efficient detection and storage of touch trajectories through a first control unit and a switch assembly. Simultaneously, the switch assembly shuts down the touch sensing layer 104 during non-touch periods, significantly reducing power consumption and extending device lifespan. The coordinated operation of the second control unit and the reset switch assembly ensures rapid clearing of touch trajectories from the bistable liquid crystal layer 102, improving operational smoothness and response speed. This embodiment's electronic handwriting tablet design optimizes hardware resource utilization and enhances stability and user experience, resulting in improvements in energy efficiency, stability, and ease of operation.

[0049] In one embodiment, the first control unit includes a control chip, an image processing subunit, a storage subunit, and a communication subunit.

[0050] The control chip is connected to the touch sensing layer 104 and is used to send the touch coordinate information corresponding to the touch trajectory to the image processing subunit when the touch sensing layer 104 senses the touch trajectory.

[0051] The image processing subunit is also connected to the second control unit. When a reset signal triggered by the second control unit is received, it generates and transmits touch trajectory information in image format to the storage subunit based on the acquired touch coordinate information, so that the storage subunit stores the touch trajectory information. Thus, the image processing subunit can simultaneously generate and store touch trajectory information in image format while the second control unit controls the bistable liquid crystal layer 102 to clear the displayed touch trajectory.

[0052] The communication subunit is connected to the storage subunit and is used to establish a communication connection with external devices and to send the touch trajectory information stored in the storage subunit to the external devices.

[0053] In one embodiment, the communication subunit may be built based on, but is not limited to, mature short-range communication technology and long-range communication technology. The short-range communication technology includes, but is not limited to, Bluetooth communication technology and WIFI communication technology, while the long-range communication technology includes, but is not limited to, server communication technology and cellular communication technology.

[0054] In one embodiment, the communication subunit may include a communication function module corresponding to various communication technologies and an indicator light. The indicator light can display a corresponding equivalent based on the communication connection status between the communication function module and the external device. For example, when the Bluetooth communication function module establishes a communication connection with the external device, the indicator light displays a blue light; when the Bluetooth communication function module does not establish a communication connection with the external device, the indicator light displays a red light.

[0055] In one embodiment, the electronic writing tablet may further include a power module for supplying power to various modules or components within the electronic writing tablet that require power. Optionally, the power module may include a charging interface to enable the power module to connect to an external power source.

[0056] Second Embodiment See Figure 2 This application provides a control method applied to an electronic writing tablet as described in the first embodiment (such as a control module applied to the electronic writing tablet as described in the first embodiment). The control method includes steps (e.g., steps S1 to S2): S1: The main body of the electronic handwriting tablet controls the detection of touch trajectory, wherein the bistable liquid crystal layer included in the main body of the handwriting tablet is used to display the touch trajectory in real time.

[0057] S2: Obtain and store touch trajectory information based on the touch trajectory.

[0058] In one embodiment, step S2, acquiring and storing touch trajectory information based on the touch trajectory, includes: in response to the triggering of a reset signal, acquiring and storing touch trajectory information based on the touch trajectory, and controlling the bistable liquid crystal layer to clear the presented touch trajectory. Thus, the technical solution of this embodiment can control the bistable liquid crystal layer to clear the presented touch trajectory by triggering a reset signal, while simultaneously controlling the image processing subunit to synchronously generate and store touch trajectory information in image format.

[0059] In one embodiment, after obtaining and storing the touch trajectory information based on the touch trajectory, step S2 includes sending the stored touch trajectory information to an external device that has established a communication connection with the electronic handwriting tablet.

[0060] In one embodiment, the reset signal is triggered in at least one of the following ways: Operate the reset switch assembly in the electronic writing tablet; The preset content is identified based on the touch trajectory. The preset content is used to map and trigger the generation instruction of the reset signal.

[0061] For example, an application scenario where a user identifies preset content based on a touch trajectory to trigger a reset signal is as follows: When a user writes any content on an electronic writing tablet, and wants to include the written content, they can draw a preset specific symbol (i.e., preset content, such as a circle or a checkmark image / trajectory) at any position on the writing tablet. When this specific symbol is recognized by the control module, it can determine the generation instruction of the reset signal it maps to. Thus, the control module triggers the reset signal according to the generation instruction. Furthermore, the control module can acquire and store the touch trajectory information based on the touch trajectory, and control the bistable liquid crystal layer to clear the presented touch trajectory.

[0062] Thus, the technical solution of this embodiment can increase the triggering method of the reset signal (other than the reset switch component) for users to choose from, and can improve the intelligence of the electronic handwriting tablet and enhance the user experience.

[0063] In one embodiment, acquiring and storing touch trajectory information based on the touch trajectory includes: acquiring touch trajectory information in image format based on the touch trajectory; identifying preset content in the touch trajectory information and eliminating the preset content in the touch trajectory information to update the touch trajectory information; and storing the updated touch trajectory information.

[0064] For example, when the control module obtains an image of important content that the user wants to record (or the initial touch trajectory information), it can delete a preset specific symbol in the image that triggers a reset signal, thereby deleting irrelevant content and improving the user experience.

[0065] The control method provided in this embodiment can be applied to the electronic handwriting tablet provided in the first embodiment, including the following steps: S1: Controlling the handwriting tablet body to detect touch trajectory, wherein the bistable liquid crystal layer included in the handwriting tablet body is used to display the touch trajectory in real time; S2: Obtaining and storing touch trajectory information based on the touch trajectory. Thus, the technical solution of this embodiment can conveniently save the content displayed in the electronic handwriting tablet, improving the user experience.

[0066] Based on the same inventive concept as the foregoing embodiments, the first embodiment described above will be illustrated by a specific example below, in which an electronic handwriting tablet will be used as an example.

[0067] See Figure 1 and Figure 3 The electronic handwriting tablet in this example includes a control module 200, a handwriting tablet body, a power module 400 (including a battery), a charging interface 500, a switch button 600 (i.e., a switch assembly), and a reset button 700 (i.e., a reset switch assembly). The handwriting tablet body includes a bistable liquid crystal layer 102, a shielding layer 103, and a touch sensing layer 104 (or TP layer) stacked in sequence. The control module includes a first control unit 200 and a reset unit 300 (i.e., the aforementioned second control unit).

[0068] The first control unit 200 includes a control chip 201 (or TP IC), an image processing subunit 202, a storage subunit 203, and a Bluetooth communication subunit 204. The Bluetooth communication subunit 204 is also connected to an indicator light 800.

[0069] The switch button 600 controls the operation of the control chip 201, image processing subunit 202, storage subunit 203, Bluetooth communication subunit 204, and indicator light 800. When the switch button 600 controls the control chip 201 (or TP IC), image processing subunit 202, storage subunit 203, Bluetooth communication subunit 204, and indicator light 800, the control chip 201 detects the touch trajectory of the touch sensing layer 104 and provides the touch coordinates corresponding to the touch trajectory to the image processing subunit 202. The reset unit 300, controlled by the reset button, outputs a reset signal to the bistable liquid crystal layer 102 to clear the touch trajectory on the bistable liquid crystal layer 102. Simultaneously, it outputs a reset signal to the image processing subunit 202, causing the image processing subunit 202 to convert the processed touch coordinates into image-format touch trajectory information and store it in the storage subunit 203. The indicator light 800 is used to indicate to the user whether the Bluetooth communication subunit 204 is properly connected. When Bluetooth is connected, the indicator light 800 is blue, and the Bluetooth communication subunit 204 transmits the touch trajectory information in image format from the storage subunit 203 to the external device that has established a Bluetooth communication connection with the Bluetooth communication subunit 204 in real time. When Bluetooth is not connected, the indicator light 800 is red, and the touch trajectory information in image format is stored in the storage subunit 203.

[0070] The electronic writing tablet provided in this application retains the advantages of existing electronic writing tablets, such as long battery life, instant display, portability, durability, and low price, and adds the function of saving important information. It can connect with other devices, allowing users to save important information written on the tablet for later use. Furthermore, the electronic writing tablet provided in this application can be used in electronic blackboards, thus achieving both low cost and the ability to save the teacher's blackboard writing for students to review after class.

[0071] Based on the same inventive concept as the foregoing examples and embodiments, the foregoing examples and embodiments will be illustrated by a specific example below. In this example, the control method of the electronic handwriting tablet for the above examples will be used as an example for illustration.

[0072] See Figure 4 The control method for electronic handwriting tablets includes the following steps: 4.1 The user performs touch actions on the electronic writing tablet; 4.2 Determine whether the switch button is turned on; if it is not turned on, the bistable liquid crystal layer displays the touch trajectory in real time; if it is turned on, the bistable liquid crystal layer displays the touch trajectory in real time, and the touch sensing layer detects the touch action, and the control chip of the first control unit reports the point so that the image processing subunit can process and obtain the touch coordinates. 4.3 Determine if the reset button has been pressed; if not, continue with the steps of real-time display of the touch trajectory by the bistable liquid crystal layer, simultaneous detection of touch action by the touch sensing layer, and reporting of touch coordinates by the control chip of the first control unit; if yes, the reset module outputs a voltage signal (reset signal) to the bistable liquid crystal layer and the image processing subunit, the bistable liquid crystal layer eliminates the touch trajectory, and the image processing subunit generates an image of the touch trajectory (image-format touch trajectory information) based on the set of touch coordinates received this time, and stores it in the storage subunit; 4.4 Determine if Bluetooth is connected; if not, the indicator light is red, and the image information of the touch trajectory is continuously stored in the storage sub-unit; if yes, the indicator light is blue, and the image information of the touch trajectory is transmitted to the connected external device in real time.

[0073] Based on the same inventive concept as the foregoing embodiments, this application provides a control device (i.e., the aforementioned control module), such as... Figure 5 As shown, the device includes: a processor 310 and a memory 311 storing a computer program; wherein, Figure 5 The processor 310 shown in the diagram does not indicate that there is only one processor 310, but only indicates the positional relationship of the processor 310 relative to other devices. In practical applications, there can be one or more processors 310; similarly, Figure 5 The memory 311 shown in the diagram has the same meaning, that is, it is only used to indicate the positional relationship of memory 311 relative to other devices. In practical applications, there can be one or more memories 311. When the processor 310 runs the computer program, it implements the control method applied to the above-mentioned device.

[0074] The device may also include at least one network interface 312. The various components of the device are coupled together via a bus system 313. It is understood that the bus system 313 is used to implement communication between these components. In addition to a data bus, the bus system 313 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 5 The general designated all buses as Bus System 313.

[0075] The memory 311 can be volatile memory or non-volatile memory, or both. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM); magnetic surface memory can be disk storage or magnetic tape storage. Volatile memory can be random access memory (RAM), used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), SyncLink Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM).The memory 311 described in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0076] The memory 311 in this embodiment is used to store various types of data to support the operation of the device. Examples of this data include any computer programs used to operate on the device, such as operating systems and applications. The operating system includes various system programs, such as framework layers, core library layers, and driver layers, used to implement various basic business functions and handle hardware-based tasks. Applications can include various applications, such as media players and browsers, used to implement various application services. Here, the program implementing the method of this embodiment can be included in the application.

[0077] Based on the same inventive concept as the foregoing embodiments, this embodiment also provides a computer-readable storage medium storing a computer program. The computer-readable storage medium can be a magnetic random access memory (FRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM), etc.; it can also be various devices including one or any combination of the above-mentioned memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc. When the computer program stored in the computer-readable storage medium is executed by a processor, it implements the above-described control method. For the specific steps implemented when the computer program is executed by the processor, please refer to [link to relevant documentation]. Figure 1 The description of the illustrated embodiments will not be repeated here.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electronic handwriting tablet, characterized in that, include: The control module and the main body of the handwriting tablet, wherein the main body of the handwriting tablet includes a bistable liquid crystal layer, a shielding layer and a touch sensing layer stacked in sequence; The bistable liquid crystal layer is used to detect and display touch trajectories to perform handwriting tablet functions; The control module is connected to the touch sensing layer and is used to detect the touch trajectory through the touch sensing layer to obtain touch trajectory information and to store the touch trajectory information; The shielding layer is used to shield the interference signals generated when the touch sensing layer is working.

2. The electronic handwriting tablet according to claim 1, characterized in that, The touch-sensing layer has light-transmitting properties and is flexible; and / or, The shielding layer has light-transmitting properties and is flexible.

3. The electronic handwriting tablet according to claim 1, characterized in that, The control module is also connected to the bistable liquid crystal layer; The control module is also used to output a reset signal to the bistable liquid crystal layer to clear the touch trajectory presented by the bistable liquid crystal layer, and at the same time store the touch trajectory information.

4. The electronic handwriting tablet according to any one of claims 1 to 3, characterized in that, The control module includes a first control unit, a switch assembly, a second control unit, and a reset switch assembly; The first control unit is connected to the touch sensing layer and is used to detect the touch trajectory through the touch sensing layer to obtain touch trajectory information and store the touch trajectory information during operation. The switch assembly is connected to the first control unit and is used to control the first control unit to work or stop working; The second control unit is connected to the bistable liquid crystal layer and the reset switch assembly, and is used to trigger and output a reset signal to the bistable liquid crystal layer through the reset switch assembly to clear the touch trace presented by the bistable liquid crystal layer.

5. The electronic handwriting tablet according to claim 4, characterized in that, The first control unit includes a control chip, an image processing subunit, a storage subunit, and a communication subunit; The control chip is connected to the touch sensing layer and is used to send the touch coordinate information corresponding to the touch trajectory to the image processing subunit when the touch trajectory is sensed by the touch sensing layer. The image processing subunit is also connected to the second control unit, and is used to generate and transmit the touch trajectory information in image format to the storage subunit according to the obtained touch coordinate information when the reset signal triggered by the second control unit is obtained, so that the storage subunit stores the touch trajectory information. The communication subunit is connected to the storage subunit and is used to establish a communication connection with an external device and to send the touch trajectory information stored in the storage subunit to the external device.

6. A control method, characterized in that, The control method, applied to an electronic handwriting tablet as described in any one of claims 1 to 5, comprises the steps of: S1: Control the main body of the electronic handwriting tablet to detect the touch trajectory, wherein the bistable liquid crystal layer included in the main body of the handwriting tablet is used to display the touch trajectory in real time; S2: Obtain and store touch trajectory information based on the touch trajectory.

7. The control method according to claim 6, characterized in that, Step S2 includes: In response to a reset signal, the system acquires and stores the touch trajectory information based on the touch trajectory, and controls the bistable liquid crystal layer to clear the presented touch trajectory; and / or, After step S2, the following is included: The stored touch trajectory information is sent to an external device that establishes a communication connection with the electronic writing tablet.

8. The control method according to claim 7, characterized in that, The reset signal is triggered in at least one of the following ways: Operate the reset switch assembly in the electronic handwriting tablet; The preset content is identified based on the touch trajectory, wherein the preset content is used to map and trigger the generation instruction of the reset signal.

9. The method according to claim 8, characterized in that, The touch trajectory information is obtained and stored based on the touch trajectory, including: The touch trajectory information in image format is obtained based on the touch trajectory. The preset content in the touch trajectory information is identified and eliminated to update the touch trajectory information; Store the updated touch trajectory information.

10. A computer-readable storage medium, characterized in that, The device contains a computer program that, when executed by a processor, implements the steps of the control method according to any one of claims 6 to 9.

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