Passive electronic paper chest card

Abstract

The invention discloses a passive electronic paper chest card which comprises a main control chip, a display module, a driving module, an electromagnetic induction module and a connecting piece. The display module is configured to display an image. And the driving module is configured to drive the display module to display an image under the control of the main control chip. The electromagnetic induction module is configured to convert induced magnetic energy into electric energy and supply power to the electronic paper chest card. And the connecting piece is connected with the main control chip and the driving module. And the connecting piece is configured to be connected with an external controller, so that the external controller is allowed to supply power to the main control chip and the driving module through the connecting piece. And the external controller provides an image refreshing signal for the main control chip through the connecting piece, so that the main control chip controls the driving module to refresh an image displayed by the display module according to the provided image refreshing signal. The connecting piece can be connected with an external controller, the data transmission requirement and the power supply requirement of color picture refreshing of the passive electronic paper chest card are met, the display picture refreshing failure is avoided, and the picture refreshing quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic display screens, and more specifically, to a passive electronic paper badge. Background Art

[0002] Passive electronic paper badges (EPDs) can convert the sensed magnetic energy into electrical energy based on near field communication (NFC) technology, and power the passive electronic paper badges instead of external power supply and battery power supply.

[0003] When the passive electronic paper badge refreshes the display screen, data transmission can be achieved based on NFC technology, and the sensed magnetic energy can be converted into electrical energy to power the main control chip and driver module of the passive electronic paper badge to achieve display screen refresh. However, due to the limited electromagnetic conversion energy of NFC, data transmission and power supply are difficult to meet the refresh requirements of the passive electronic paper badge, which will cause the display screen to fail to refresh or the refreshed image quality to be poor. Summary of the invention

[0004] The embodiments of the present application provide a passive electronic paper badge.

[0005] The passive electronic paper badge provided in the embodiment of the present application includes a main control chip, a display module, a driving module, an electromagnetic induction module and a connector. The display module is configured to display an image. The driving module is configured to drive the display module to display an image under the control of the main control chip. The electromagnetic induction module is configured to convert the induced magnetic energy into electrical energy and power the electronic paper badge. The connector is connected to the main control chip and the driving module. The connector is configured to be connected to an external controller to allow the external controller to power the main control chip and the driving module through the connector. The external controller provides an image refresh signal to the main control chip through the connector, so that the main control chip controls the driving module to refresh the image displayed by the display module according to the provided image refresh signal.

[0006] The connector can be connected to an external controller, so that the external controller can supply power to the main control chip and the driver module in the electronic paper badge through the connector, meeting the power supply requirements of the main control chip and the driver module. At the same time, the connector can also realize reliable data transmission, ensuring that the external controller provides the image refresh signal to the main control chip, meeting the data transmission requirements and power supply requirements of the color screen refresh of the passive electronic paper badge, avoiding the failure of display screen refresh, and improving the quality of the refreshed screen. Since the electronic paper badge has a bistable property, when the electronic paper badge does not need to refresh the screen, the displayed image can be kept unchanged, and the main control chip and the driver module do not consume additional power to maintain the image display. At this time, the electronic paper badge does not need external power supply, and the electromagnetic induction module can convert the induced magnetic energy into electrical energy, replacing the traditional battery to power the electronic paper badge, so as to meet the power supply requirements of the electronic paper badge and realize the low power consumption concept of the passive electronic paper badge.

[0007] In some embodiments, the electronic paper badge further includes a communication chip. The communication chip is isolated from the main control chip, the electromagnetic induction module is configured to supply power to the communication chip, and the electromagnetic induction module is further configured to sense the magnetic signals generated by the external card reader and the main control chip, and convert the magnetic signals generated by the external card reader and the main control chip into communication signals to achieve communication connection between the communication chip and the external card reader.

[0008] In the passive electronic paper badge provided in the embodiment of the present application, the communication chip is isolated from the main control chip to ensure the electromagnetic induction distance of the communication chip, that is, to ensure the card reading distance of the electronic paper badge.

[0009] In some embodiments, the electromagnetic induction module includes a coil unit, which is configured to sense the magnetic signal generated by the external card reader and convert it into a corresponding communication signal to the communication chip. The coil unit is isolated from the main control chip, the display module and the driving module.

[0010] In some embodiments, the electronic paper badge further includes a driving circuit board, a communication circuit board and an electronic paper display screen. The main control chip and the driving module are integrated and arranged on the driving circuit board. The electronic paper display screen is located on one side of the driving circuit board, and the display module is arranged on the electronic paper display screen. The communication circuit board is located on the side of the driving circuit board away from the electronic paper display screen, the coil unit and the communication chip are arranged on the communication circuit board, and the orthographic projection of the communication circuit board on the driving circuit board does not overlap with the electronic devices on the driving circuit board.

[0011] In some embodiments, the driving circuit board is provided with a copper layer, the electronic components on the driving circuit board are arranged on the copper layer and electrically connected through the copper layer, and the orthographic projection of the communication circuit board on the driving circuit board does not overlap with the copper layer.

[0012] In some embodiments, the orthographic projection of the communication circuit board on the driving circuit board is arranged around the copper layer.

[0013] In some implementations, the communication chip is in communication connection with the external card reader to implement the simulation function of the electronic paper badge.

[0014] In some embodiments, the communication chip includes multiple storage units and a control unit, each of the storage units is configured to store a corresponding segment of encrypted data, the control unit is configured to store passwords corresponding to the corresponding multiple segments of the encrypted data, and the control unit is configured to decrypt the corresponding encrypted data according to the communication signal of the external card reader to realize the simulation function of the electronic paper badge.

[0015] In some embodiments, the simulated functions of the electronic paper badge include at least one of access control, cafeteria, and attendance functions.

[0016] In some embodiments, the electronic paper badge further includes a shell, the main control chip and the driving module are accommodated inside the shell, and the connecting member is arranged outside the shell.

[0017] In some embodiments, the driving module is configured to drive the display module to display images of multiple colors.

[0018] The embodiment of the present application provides a passive electronic paper badge, including a main control chip, a display module, a driving module, an electromagnetic induction module and a connector. The display module is configured to display an image. The driving module is configured to drive the display module to display an image under the control of the main control chip. The electromagnetic induction module is configured to convert the induced magnetic energy into electrical energy and power the electronic paper badge. The connector is connected to the main control chip and the driving module. The connector is configured to be connected to an external controller to allow the external controller to power the main control chip and the driving module through the connector. The external controller provides an image refresh signal to the main control chip through the connector, so that the main control chip controls the driving module to refresh the image displayed by the display module according to the provided image refresh signal.

[0019] The connector can be connected to an external controller, so that the external controller can supply power to the main control chip and the driver module in the electronic paper badge through the connector, meeting the power supply requirements of the main control chip and the driver module. At the same time, the connector can also realize reliable data transmission, ensuring that the external controller provides the image refresh signal to the main control chip, meeting the data transmission requirements and power supply requirements of the color screen refresh of the passive electronic paper badge, avoiding the failure of display screen refresh, and improving the quality of the refreshed screen. Since the electronic paper badge has a bistable property, when the electronic paper badge does not need to refresh the screen, the displayed image can be kept unchanged, and the main control chip and the driver module do not consume additional power to maintain the image display. At this time, the electronic paper badge does not need external power supply, and the electromagnetic induction module can convert the induced magnetic energy into electrical energy, replacing the traditional battery to power the electronic paper badge, so as to meet the power supply requirements of the electronic paper badge and realize the low power consumption concept of the passive electronic paper badge.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic diagram of an electronic paper badge according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of an electronic paper badge according to some embodiments of the present application;

[0024] Figure 3 is a schematic diagram of an electronic paper badge according to some embodiments of the present application;

[0025] Figure 4 is a schematic diagram of an electronic paper badge according to some embodiments of the present application;

[0026] Figure 5 is a schematic diagram of an electronic paper badge according to some embodiments of the present application;

[0027] Figure 6 is a schematic diagram of an electronic paper badge according to certain embodiments of the present application.

[0028] Description of main component symbols:

[0029] Electronic paper badge 100, main control chip 11, drive module 12, display module 13, electromagnetic induction module 20, coil unit 21, connector 30, communication chip 40, storage unit 41, control unit 42, drive circuit board 50, copper layer 51, communication circuit board 60, electronic paper display screen 70, shell 80, front cover 81, rear cover 82, fixing part 90, screw 91, foam double-sided tape 92, hot melt adhesive 93. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0031] All directional indications (such as up, down, left, right, front, and back) in the embodiments of the present application are only used to explain the relative positional relationship, movement, etc. between the components under a certain posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the related art, a passive electronic paper badge (EPD) can convert the sensed magnetic energy into electrical energy based on the Near Field Communication (NFC) technology, and power the passive electronic paper badge instead of external power supply and battery power supply.

[0033] When the passive electronic paper badge refreshes the display screen, data transmission can be achieved based on NFC technology, and the sensed magnetic energy can be converted into electrical energy to power the main control chip and driver module of the passive electronic paper badge to achieve display screen refresh. However, due to the limited electromagnetic conversion energy of NFC, data transmission and power supply are difficult to meet the refresh requirements of the passive electronic paper badge, which will cause the display screen to fail to refresh or the refreshed image quality to be poor.

[0034] In order to solve the above technical problems, the present application embodiment provides an electronic paper badge (such as Figure 1 to Figure 6 As shown), when the electronic paper badge provided by the embodiment of the present application is refreshing the screen, it can ensure the data transmission and power supply stability of the passive electronic paper badge, meet the screen refresh requirements of the passive electronic paper badge, avoid display screen refresh failure, and improve the quality of the refreshed image.

[0035] The electronic paper badge 100 provided in the embodiment of the present application includes a main control chip 11, a display module 13, a driving module 12, an electromagnetic induction module 20 and a connector 30. Among them, the display module 13 is configured to display an image. The driving module 12 is configured to drive the display module 13 to display an image under the control of the main control chip 11. The electromagnetic induction module 20 is configured to convert the induced magnetic energy into electrical energy and power the electronic paper badge 100. The connector 30 is connected to the main control chip 11 and the driving module 12. The connector 30 is configured to be connected to an external controller to allow the external controller to power the main control chip 11 and the driving module 12 through the connector 30. The external controller provides an image refresh signal to the main control chip 11 through the connector 30, so that the main control chip 11 controls the driving module 12 to refresh the image displayed by the display module 13 according to the image refresh signal provided.

[0036] Specifically, the main control chip 11 can receive and process signals from an external controller (such as a host computer such as a computer or a smart phone), and then control the working state of each pixel according to the signal from the host computer, so as to display the desired image on the electronic paper screen.

[0037] The driving module 12 can convert the control signal generated by the chip into voltage or current, thereby driving the transistor in the pixel circuit to work. The driving module 12 may include a source driver and a gate driver. The source driver is responsible for providing a control signal to the source of the pixel circuit, while the gate driver controls the gate signal to control the switching state of the pixel. In this way, the driving module 12 can achieve precise adjustment of the color and brightness of each pixel, ultimately presenting rich colors and clear images.

[0038] The display module 13 may include a corresponding pixel circuit, and the pixel circuit may include a pixel unit and a corresponding driving element. The pixel unit is responsible for storing and displaying the color information of a single pixel (generally the three primary colors of red, green and blue). The driving element includes a transistor and a possible capacitor that control the pixel to be turned on or off, and is used to maintain the brightness or color of the pixel. Through different combinations and control of the pixel circuit, a variety of images and texts can be formed to achieve a high-resolution and high-contrast display effect.

[0039] The working principle of the electromagnetic induction module 20 is based on the law of electromagnetic induction, that is, when a conductor is in a changing magnetic field, an electromotive force (induced electromotive force) will be generated in the conductor, thereby generating current. The electromagnetic induction module 20 can convert the induced magnetic energy into electrical energy and supply power to the electronic paper badge 100.

[0040] In some embodiments, the main control chip 11 may be a driver chip, such as a TFT-LCD driver IC, an AMOLED driver IC, etc. The driver chip may integrate the functions of the main control chip 11 and the driver module 12 .

[0041] In some embodiments, the main control chip 11 may include a graphics processing unit (GPU), which accelerates image processing and rendering processes through its powerful computing power, thereby improving display performance and the quality of displayed images.

[0042] In some embodiments, the connector 30 can be connected to the main control chip 11 through a voltage conversion circuit. The connector 30 can be connected to a 5V power supply voltage, and the 5V power supply voltage is converted into a 3.3V power supply voltage for the main control chip 11 through the voltage conversion circuit.

[0043] The connector 30 can be any one of a plug, a connecting wire, a connecting port, a magnetic attraction or a pin. The connector 30 can be connected to an external controller, so that the external controller can supply power to the main control chip 11 and the driving module 12 in the electronic paper badge 100 through the connector 30, thereby meeting the power supply requirements of the main control chip 11 and the driving module 12. At the same time, the connector 30 can also realize reliable data transmission, ensuring that the external controller provides the image refresh signal to the main control chip 11, meeting the data transmission requirements and power supply requirements of the passive EPD color screen refresh, avoiding the failure of display screen refresh, and improving the quality of the refreshed screen.

[0044] In addition, since the display module 13 of the electronic paper badge 100 has a bistable property, the display module 13 can keep the displayed image unchanged, and the main control chip 11, the drive module 12 and the display module 13 do not consume additional power to maintain the display of the image. At this time, the electronic paper badge 100 does not need external power supply, and the electromagnetic induction module 20 can convert the sensed magnetic energy into electrical energy, replacing the traditional battery to power the electronic paper badge 100, so as to meet the power supply requirements of the main control chip 11, the drive module 12 and other functional modules of the electronic paper badge 100, and realize the low power consumption concept of passive EPD. Figure 2 In some embodiments, the electronic paper badge 100 may include a communication chip 40 , and the electromagnetic induction module 20 replaces a traditional battery to power the communication chip 40 to meet the power supply requirements of the communication chip 40 .

[0045] In the relevant technology, passive EPD has the following characteristics: using electronic paper to replace traditional paper, updating display information at any time, but the black and white color display is single; no external power supply is required, using NFC near-field induction to convert magnetic energy into electrical energy, using farad capacitors for energy storage, replacing traditional batteries; using NFC near-field communication, data transmission, and updating display screens, but the passive NFC electromagnetic conversion energy is limited, and the screen refresh often fails; the function is single, and the white cards on the market can only be used to obtain IDs, and cannot be customized to update the screen display information.

[0046] Compared with the passive EPD in the related art, the electronic paper badge 100 provided in the embodiment of the present application can be connected to an external controller through a connector 30. When the passive EPD needs to refresh the display screen, the screen that needs to be refreshed can be customized on the host computer. The connector 30 can meet the data transmission requirements and power supply requirements of the passive EPD color screen refresh, avoid failure to refresh the display screen, and ensure the quality of the refreshed image. The quality of the refreshed image can be a high-definition color image. When the passive EPD does not need to refresh the display screen, the electromagnetic induction module 20 can convert the induced magnetic energy into electrical energy, replacing the traditional battery to power the electronic paper badge 100, so as to meet the power supply requirements of the electronic paper badge 100 and realize the low power consumption concept of the passive EPD.

[0047] Reference Figure 2 In some embodiments, the electronic paper badge 100 further includes a communication chip. The communication chip is isolated from the main control chip 11, and the electromagnetic induction module 20 is configured to supply power to the communication chip. The electromagnetic induction module 20 is also configured to sense the magnetic signals generated by the external card reader and the main control chip 11, and convert the magnetic signals generated by the external card reader and the main control chip 11 into communication signals to achieve communication connection between the communication chip and the external card reader.

[0048] Specifically, the communication chip and the main control chip 11 are isolated from each other to avoid mutual interference between the communication chip and the main control chip 11 , which helps to improve the display function and electromagnetic induction function of the electronic paper badge 100 .

[0049] The communication chip is connected to the external card reader through the electromagnetic induction module 20, and can identify and control specific electromagnetic induction events, such as wireless charging, induction operations in the access control system, etc. The independently set communication chip can make the design of the electromagnetic induction function more flexible, and the electromagnetic induction function can be increased or decreased according to different application scenarios without affecting the integrity of the display function of the electronic paper badge 100.

[0050] The function of the main control chip 11 focuses on the generation and display of visual information such as images and text. The main control chip 11 can be independently set to optimize the display effect, such as color saturation, contrast, refresh rate, etc., and can also support different display technologies (such as LCD, OLED, LED, etc.) and resolutions as needed.

[0051] The communication chip can be designed to be in low power consumption mode, the electromagnetic induction module 20 can power the communication chip, and the main control chip 11 can be disabled when the display screen does not need to be refreshed, and enabled when the display screen needs to be refreshed, so as to reduce the power consumption of the electronic paper badge 100.

[0052] Reference Figure 3In some embodiments, the electromagnetic induction module 20 includes a coil unit 21, which is configured to sense the magnetic signal generated by the external card reader and convert it into a corresponding communication signal to the communication chip. The coil unit 21 is isolated from the main control chip 11, the display module 13 and the driving module 12.

[0053] Specifically, when the external card reader communicates with the communication chip, a specific changing magnetic field can be generated. When the coil unit 21 is in the changing magnetic field, an electromotive force (induced electromotive force) is generated, thereby generating a current. The coil unit 21 can convert the induced magnetic energy into a corresponding communication signal to the communication chip. The communication chip identifies the magnetic field generated by the external card reader by obtaining the corresponding communication signal, thereby realizing the communication connection between the external card reader and the communication chip.

[0054] The communication chip can also control the coil unit 21 to generate a changing magnetic field, and the external card reader can achieve communication connection between the external card reader and the communication chip by identifying the magnetic field generated by the coil unit.

[0055] The coil unit 21 is isolated from the main control chip 11 to prevent the main control chip 11 from affecting the coil unit 21 in identifying the magnetic field generated by the external card reader or generating a changing magnetic field, so as to ensure the sensing distance between the communication chip and the external card reader.

[0056] Reference Figure 4 as well as Figure 5 In some embodiments, the electronic paper badge 100 further includes a driving circuit board 50, a communication circuit board 60 and an electronic paper display screen 70. The main control chip 11 and the driving module 12 are integrated and arranged on the driving circuit board 50. The electronic paper display screen 70 is located on one side of the driving circuit board 50, and the display module 13 is arranged on the electronic paper display screen 70. The communication circuit board 60 is located on the side of the driving circuit board 50 away from the electronic paper display screen 70, and the coil unit 21 and the communication chip are arranged on the communication circuit board 60, and the orthographic projection of the communication circuit board 60 on the driving circuit board 50 does not overlap with the electronic devices on the driving circuit board 50.

[0057] Specifically, the communication circuit board 60 may cover the driving circuit board 50 , and the communication circuit board 60 and the electronic devices on the driving circuit board 50 do not overlap.

[0058] The electronic devices on the driving circuit board 50 include a driving module 12 and a main control chip 11. The coil unit 21 and the communication chip are integrated on the communication circuit board 60. The communication circuit board 60 does not overlap with the electronic devices on the driving circuit board 50, that is, the coil unit 21 and the communication chip do not overlap with the coil unit 21 and the main control chip 11.

[0059] In this way, the coil unit 21 and the communication chip do not overlap with the coil unit 21 and the main control chip 11 , thereby achieving isolation between the coil unit 21 and the communication chip and the coil unit 21 and the main control chip 11 .

[0060] Reference Figure 4 In some embodiments, the driving circuit board 50 is provided with a copper layer 51, the electronic components on the driving circuit board 50 are arranged on the copper layer 51 and are electrically connected through the copper layer 51, and the orthographic projection of the communication circuit board 60 on the driving circuit board 50 does not overlap with the copper layer 51.

[0061] Specifically, the copper layer 51 provides a stable reference plane for the driving circuit board 50 , and the electronic devices on the driving circuit board 50 are electrically connected through the copper layer 51 , which helps to reduce the wiring of signal lines of the electronic devices on the driving circuit board 50 .

[0062] The copper layer 51 can also serve as an electromagnetic shielding layer, which can prevent electromagnetic radiation inside the driver circuit board 50 from leaking to the outside, and also prevent external electromagnetic interference from entering the driver circuit board 50. The orthographic projection of the communication circuit board 60 on the driver circuit board 50 does not overlap with the copper layer 51, that is, the electromagnetic isolation of the coil unit 21 and the communication chip from the driver circuit board 50 is achieved, eliminating the magnetic field interference of the driver circuit board 50 on the coil unit 21 and the communication chip, and ensuring the sensing distance of the communication chip.

[0063] Reference Figure 4 In some embodiments, the orthographic projection of the communication circuit board 60 on the driving circuit board 50 is arranged around the copper layer 51 .

[0064] Specifically, the orthographic projection of the communication circuit board 60 on the driving circuit board 50 can be arranged around the copper layer 51, and an avoidance distance can be set between the copper layer 51. The avoidance distance can be determined according to the manufacturing tolerance of the communication circuit board 60 and the driving circuit board 50, at least ensuring that the orthographic projection of the communication circuit board 60 on the driving circuit board 50 is isolated from the copper layer 51.

[0065] In some embodiments, the orthographic projection of the communication circuit board 60 on the driving circuit board 50 is located inside the communication circuit board 60 .

[0066] Reference Figure 4 as well as Figure 5 In some embodiments, the electronic paper badge 100 may include a housing 80 , the main control chip 11 and the driving module 12 are accommodated inside the housing 80 , and the connector 30 is disposed outside the housing 80 .

[0067] Specifically, the housing 80 may include a front cover plate 81 and a rear cover plate 82, wherein the front cover plate may be disposed on a side of the electronic display screen away from the driver circuit board 50, and the rear cover plate 82 may be disposed on a side of the communication circuit board 60 away from the driver circuit board 50. The front cover plate 81 and the rear cover plate 82 cooperate to form a closed housing 80, and the main control chip 11, the driver module 12 and the display module 13 are accommodated inside the housing 80.

[0068] The connector 30 may be disposed outside the housing 80 , so that the external controller can connect the main control chip 11 and the driving module 12 inside the housing 80 through the connector 30 outside the housing 80 .

[0069] by Figure 4 For example, the connector 30 may be a Type-C interface provided on the driver circuit board 50, and the external controller may be electrically connected to the main control chip 11 and the driver module 12 provided on the driver circuit board 50 through the Type-C interface, so that the external controller may power the main control chip 11 and the driver module 12 in the electronic paper badge 100 through the connector 30, thereby satisfying the power supply requirements of the main control chip 11 and the driver module 12, and the connector 30 may also realize reliable data transmission.

[0070] In some embodiments, the electronic paper badge 100 may include a fixing member 90 . The driving circuit board 50 , the communication circuit board 60 , the electronic paper display screen 70 and the housing 80 may be fixedly connected by the fixing member 90 .

[0071] The fixing member may include a screw 91, a foam double-sided adhesive 92, and a hot melt adhesive 93. The foam double-sided adhesive 92 is located between the driving circuit board 50 and the electronic paper display screen 70, and serves as an adhesive layer between the driving circuit board 50 and the electronic paper display screen 70. The screw 91 may be connected through a through hole on the driving circuit board 50 to fix the position of the driving circuit board 50. The hot melt adhesive 93 is located between the front cover plate 81 and the electronic paper display screen 70, and serves as an adhesive layer between the front cover plate 81 and the electronic paper display screen 70.

[0072] In some implementations, the communication chip is in communication with an external card reader to implement the analog function of the electronic paper badge 100 .

[0073] Specifically, the communication chip is connected to the external card reader through the electromagnetic induction module 20, and can identify and control specific electromagnetic induction events, such as wireless charging, induction operations in the access control system, etc., and realize the simulation function of the electronic paper badge 100 by communicating with the external card reader.

[0074] For example, communication chips can be used in conferences, events, exhibitions and other occasions to identify the identities of participants, speakers, and staff, and may include some additional functions such as displaying personal information, participating in voting, and receiving notifications.

[0075] In some implementations, the simulated functions of the electronic paper badge 100 include at least one of access control, cafeteria, and attendance functions.

[0076] Specifically, the external card reader can be an access control system, a cafeteria system or an attendance system. The communication chip recognizes the induction operation in the access control system through the electromagnetic induction module 20 to realize the access control function of the electronic paper badge 100. The communication chip recognizes the induction operation in the cafeteria system through the electromagnetic induction module 20 to realize the cafeteria function of the electronic paper badge 100. The communication chip recognizes the induction operation in the attendance system through the electromagnetic induction module 20 to realize the attendance function of the electronic paper badge 100.

[0077] In some embodiments, the communication chip includes multiple storage units 41 and a control unit 42, each storage unit 41 is configured to store a corresponding segment of encrypted data, the control unit 42 is configured to store passwords corresponding to the corresponding multiple segments of encrypted data, and the control unit 42 is configured to decrypt the corresponding encrypted data according to the communication signal of the external card reader to realize the simulation function of the electronic paper badge 100.

[0078] In some implementations, when the electronic paper badge 100 refreshes the display screen, the host computer can customize the screen that needs to be refreshed, and send a data transmission instruction through the connector 30 to send the data to the main control chip 11.

[0079] After identifying the data transmission instruction, the main control chip 11 performs task scheduling and transmits data to control the operation of the driving module 12, and the driving module 12 drives the display module 13 to refresh the screen. The tasks processed by the main control chip 11 include task scheduling, time management, interface communication, interrupt processing, watchdog, message queue, etc.

[0080] Reference Figure 6 In some embodiments, the communication chip includes multiple storage units 41 and a control unit 42, each storage unit 41 is configured to store a corresponding segment of encrypted data, the control unit 42 is configured to store passwords corresponding to the corresponding multiple segments of encrypted data, and the control unit 42 is configured to decrypt the corresponding encrypted data according to the communication signal of the external card reader to realize the simulation function of the electronic paper badge 100.

[0081] Specifically, to ensure the security of user information, a security encryption algorithm can be customized in the communication chip to encrypt data to prevent user information from being stolen.

[0082] The data inside the communication chip can be divided into several data segments of fixed length (such as 128 bits), and then each segment of data is encrypted. The encrypted data can be stored in each sector of the communication chip.

[0083] The communication chip may include multiple sectors, each sector includes multiple storage units 41 and corresponding control units 42, each storage unit 41 may be used to store a corresponding segment of encrypted data, the control unit 42 is configured to store passwords corresponding to the corresponding multiple segments of encrypted data, and the control unit 42 is configured to execute corresponding control information according to the communication signal of the external card reader, decrypt the corresponding encrypted data, so as to read the corresponding segment of encrypted data, and realize the simulation function of the electronic paper badge 100.

[0084] In some embodiments, the communication chip may include 16 sectors, each sector has 4 blocks, where blocks 0, 1, and 2 are used as storage units 41 to store data, and block 3 is used as a control unit 42 to store passwords and access control information.

[0085] In the related art, under a magnetic field strength of 2A / m (ordinary card reader), a conventional passive EPD can only achieve a card reading distance of about 1-3cm, and a mobile phone NFC card reading distance is also about 1-3cm.

[0086] The electronic paper badge 100 provided in the embodiment of the present application is tested under the same magnetic field strength and can achieve a card reading distance of 7 cm. Compared with conventional passive EPD, the electronic paper badge 100 provided in the embodiment of the present application has greatly improved sensitivity and greatly enhanced user experience.

[0087] In some embodiments, the driving module 12 is configured to drive the display module 13 to display images in multiple colors.

[0088] Specifically, the electronic paper badge 100 provided in the embodiment of the present application can display color images, and while realizing the design of a color EPD badge, the card simulation function is optimized to ensure the card reading distance of the electronic paper badge 100.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0090] In addition, the term "connection" should be understood in a broad sense, for example, it can include fixed connection, detachable connection, or integral connection; it can include direct connection, indirect connection through an intermediate medium, and internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electronic paper badge, characterized in that: include: Main control chip; A display module configured to display an image; A driving module, configured to drive the display module to display an image under the control of the main control chip; An electromagnetic induction module, configured to convert the sensed magnetic energy into electrical energy and supply power to the electronic paper badge; A connector is connected to the main control chip and the driving module, and the connector is configured to be connected to an external controller to allow the external controller to power the main control chip and the driving module through the connector, and the external controller provides an image refresh signal to the main control chip through the connector, so that the main control chip controls the driving module to refresh the image displayed by the display module according to the provided image refresh signal.

2. The electronic paper badge according to claim 1, characterized in that: The electronic paper badge also includes: The communication chip is isolated from the main control chip, and the electromagnetic induction module is configured to power the communication chip. The electromagnetic induction module is also configured to sense the magnetic signals generated by the external card reader and the main control chip, and convert the magnetic signals generated by the external card reader and the main control chip into communication signals to achieve communication connection between the communication chip and the external card reader.

3. The electronic paper badge according to claim 2, characterized in that: The electromagnetic induction module includes a coil unit, which is configured to sense the magnetic signal generated by the external card reader and convert it into a corresponding communication signal to the communication chip. The coil unit is isolated from the main control chip, the display module and the driving module.

4. The electronic paper badge according to claim 3, characterized in that: The electronic paper badge also includes: A driving circuit board, on which the main control chip and the driving module are integrated; An electronic paper display screen is located on one side of the driving circuit board, and the display module is arranged on the electronic paper display screen; A communication circuit board is located on a side of the driving circuit board away from the electronic paper display screen. The coil unit and the communication chip are arranged on the communication circuit board. The orthographic projection of the communication circuit board on the driving circuit board does not overlap with the electronic devices on the driving circuit board.

5. The electronic paper badge according to claim 4, characterized in that: The driving circuit board is provided with a copper layer, the electronic components on the driving circuit board are arranged on the copper layer and are electrically connected through the copper layer, and the orthographic projection of the communication circuit board on the driving circuit board does not overlap with the copper layer.

6. The electronic paper badge according to claim 5, characterized in that: The orthographic projection of the communication circuit board on the driving circuit board is arranged around the copper layer.

7. The electronic paper badge according to claim 2, characterized in that: The communication chip is in communication connection with the external card reader to realize the simulation function of the electronic paper badge.

8. The electronic paper badge according to claim 7, characterized in that: The communication chip includes multiple storage units and a control unit, each of the storage units is configured to store a corresponding segment of encrypted data, the control unit is configured to store passwords corresponding to the corresponding multiple segments of the encrypted data, and the control unit is configured to decrypt the corresponding encrypted data according to the communication signal of the external card reader to realize the simulation function of the electronic paper badge.

9. The electronic paper badge according to claim 7, characterized in that: The simulated functions of the electronic paper badge include at least one of access control, canteen, and attendance functions.

10. The electronic paper badge according to claim 1, characterized in that: The electronic paper badge also includes: The main control chip and the driving module are accommodated inside the shell, and the connecting member is arranged outside the shell.

11. The electronic paper badge according to claim 1, characterized in that: The driving module is configured to drive the display module to display images of multiple colors.

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