Interactive display screen, and interactive display system

Abstract

The present application is applicable to the technical field of display devices, and provides an interactive display screen and an interactive display system. The interactive display screen comprises a touch-sensitive writing screen; a stylus pen cavity configured to place a stylus pen, wherein an NFC card is arranged inside the stylus pen, the NFC card stores feature information of the stylus pen, and at least one RFID circuit corresponding to the NFC card is arranged inside the stylus pen cavity; and a main controller, electrically connected to the touch-sensitive writing screen and the RFID circuit.

Description

Interactive display screen and interactive display system

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202422867298.8, filed on November 22, 2024, entitled “Interactive Display Screen and Interactive Display System,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of display device technology, and more specifically, relates to an interactive display screen and an interactive display system. Background Technology

[0004] Current touch writing screens generally place the writing pen on the side or bottom of the screen, using infrared or Hall sensors to detect the pen's placement or removal.

[0005] Infrared detection is susceptible to lighting conditions, leading to errors and misidentification of pen placement / removal status. It also struggles to recognize multiple pen types. Hall effect sensors are easily affected by magnetic fields. Summary of the Invention

[0006] The purpose of this application is to provide an interactive display screen and an interactive display system, aiming to solve the technical problem that interactive display screens are prone to misidentification in related technologies.

[0007] To achieve the above objectives, according to one aspect of this application, an interactive display screen is provided, comprising: a touch writing screen; a pen holder cavity configured to hold a writing pen, wherein the writing pen contains an NFC card storing characteristic information of the writing pen, and the pen holder cavity contains at least one RFID circuit corresponding to the NFC card; and a main controller electrically connected to the touch writing screen and the RFID circuit.

[0008] Alternatively, the pen case cavity may be located below, above, or on the back of the touch writing screen.

[0009] Optionally, the pen box cavity is located directly below, to the lower right or to the lower left of the touch writing screen.

[0010] Optionally, the interactive display screen includes multiple RFID circuits, each corresponding to an NFC card located in the writing pen.

[0011] Optionally, the RFID circuit includes a control chip, a signal transmission circuit connected to the control chip, and an antenna connected to the signal transmission circuit.

[0012] Optionally, the control chip includes a signal output port, a signal input port, and a clock signal port that are connected to the main controller.

[0013] Optionally, the signal output port and signal input port are one of the following: UART port, USART port, SPI port, and IIC port.

[0014] Optionally, the control chip includes a first signal transmitting port, a second signal transmitting port, and a signal receiving port connected to the signal transmission circuit.

[0015] Optionally, the RFID circuit establishes a connection with the main controller via UART, USART, SPI, or IIC communication.

[0016] Optionally, the main controller is provided with a storage unit for storing feature information of at least one writing pen.

[0017] To achieve the above objectives, according to another aspect of this application, an interactive display system is provided, comprising: at least one writing pen and the aforementioned interactive display screen, wherein the writing pen is provided with an NFC card, the NFC card stores the characteristic information of the writing pen, and at least one RFID circuit corresponding to the NFC card is provided inside the pen case cavity.

[0018] The beneficial effects of this application are as follows: The interactive display screen of this application includes a touch writing screen; a pen box cavity for placing a writing pen, wherein the writing pen contains an NFC card, the NFC card stores the characteristic information of the writing pen, and the pen box cavity contains at least one RFID circuit corresponding to the NFC card; and a main controller electrically connected to the touch writing screen and the RFID circuit, which can realize real-time detection of the writing pen status and real-time identification of the writing pen type by corresponding with the NFC card inside the writing pen through the RFID circuit inside the pen box cavity. Attached Figure Description

[0019] To more clearly illustrate the technical features of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is a schematic diagram of the structure of the interactive display screen provided in an embodiment of this application;

[0021] Figure 2 is a schematic diagram of the installation of the interactive display screen provided in the embodiment of this application;

[0022] Figure 3 is a schematic diagram of the writing pen provided in an embodiment of this application;

[0023] Figure 4 is a schematic diagram of the installation of the RFID circuit inside the pen box cavity provided in an embodiment of this application;

[0024] Figure 5 is a functional schematic diagram of the interactive display screen provided in an embodiment of this application;

[0025] Figure 6 is a schematic diagram of the RFID circuit provided in an embodiment of this application.

[0026] The detailed list of reference numerals in the above figures is as follows: 11. Touchscreen writing screen; 12. Pen case cavity; 13. Main controller; 14. Writing pen; 15. NFC card; 16. RFID circuit; 161. Control chip; 162. Signal transmission circuit; 163. Antenna; Y1. Crystal oscillator; C1. First capacitor; C2. Second capacitor; R1. First resistor; R2. Second resistor; R3. Third resistor; R4. Fourth resistor; C3. Third capacitor; C4. Fourth capacitor; C5. Fifth capacitor; C6. Sixth capacitor; C7. Seventh capacitor; C8. Eighth capacitor; C9. Ninth capacitor; C10. Tenth capacitor; C11. Eleventh capacitor; C12. Twelfth capacitor; L1. First inductor; L2. Second inductor. Detailed Implementation

[0027] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific implementation methods of this application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this application. Other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort should all fall within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] In the description of this application, it should be understood that the numbering itself, such as "first", "second", etc., is only used to distinguish the described objects and has no sequential or technical meaning, and should not be construed as specifying or implying the importance of the described objects.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In the description of this application, the term "multiple" refers to two or more. Furthermore, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0032] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the application. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] As described in the background section, related technologies use infrared or Hall sensors to detect the placement or removal of a writing pen. However, infrared detection is easily affected by light, causing detection errors and making it easy to misidentify the placement or removal status of the writing pen. It is also difficult to identify multiple types of pens. Hall sensors are easily affected by magnetic fields, which can easily lead to misidentification.

[0034] To address the aforementioned problems, according to one aspect of this application, an interactive display system is provided, comprising at least one writing pen and an interactive display screen. The writing pen internally houses a Near Field Communication (NFC) card, which stores characteristic information of the writing pen. At least one RFID circuit corresponding to the NFC card is disposed within the pen case cavity. Each NFC card is matched with at least one RFID circuit disposed in the interactive display screen. If the NFC card internal to the writing pen does not match any RFID circuit in the interactive display screen, it indicates that the writing pen does not belong to the interactive display system. The specific structure of the interactive display screen is described below.

[0035] Referring to Figures 1-6, to address the aforementioned problems, according to one aspect of this application, an embodiment of this application provides an interactive display screen, which includes a touch-sensitive writing screen 11, a pen holder cavity 12, and a main controller 13. The pen holder cavity 12 is configured to hold a writing pen 14, and the writing pen 14 contains a Near Field Communication (NFC) card 15. The NFC card 15 stores the characteristic information of the writing pen 14, and the pen holder cavity 12 contains at least one Radio Frequency Identification (RFID) circuit 16 corresponding to the NFC card 15. The main controller 13 is electrically connected to the touch-sensitive writing screen 11 and the RFID circuit 16.

[0036] When the writing pen 14 is taken out of the pen case cavity 12, and the RFID circuit 16 cannot detect a certain NFC card 15, the RFID circuit 16 sends the corresponding pen removal signal and the characteristic signal of the writing pen 14 to the main controller 13. The main controller 13 uses this to identify that a certain type of writing pen 14 has been taken out of the pen case cavity.

[0037] When the writing pen 14 is placed back into the pen case cavity 12, and the RFID circuit 16 detects an NFC card 15, the RFID circuit 16 sends a corresponding pen return signal and the characteristic signal of the writing pen to the main controller 13. The main controller 13 then identifies that a certain type of writing pen has been placed back into the pen case cavity.

[0038] When an NFC card that does not belong to the interactive display system corresponding to the interactive display screen is inserted, the RFID circuit 16 sends a corresponding outlier signal to the main controller 13, and the main controller 13 uses this signal to determine that the NFC card does not belong to the interactive display system.

[0039] In this embodiment, the pen holder cavity is located below, above, or on the back of the touch writing screen. More specifically, the pen holder cavity can be located directly below, to the lower right, or to the lower left of the touch writing screen. As shown in Figure 2, the pen holder cavity 12 is located to the lower right of the touch writing screen 11. It is evident that the position of the pen holder cavity is flexible and its location and structure can be adjusted as needed.

[0040] When multiple writing pens 14 are placed in the pen holder cavity 12, the corresponding interactive display screen in this embodiment includes multiple RFID circuits 16. Each RFID circuit 16 corresponds to an NFC card 15 disposed in a writing pen 14. For example, in Figure 5, all three RFID circuits 16 are connected to the main controller 13, and each RFID circuit corresponds to one NFC card. RFID circuit 1 corresponds to NFC1, RFID circuit 2 corresponds to NFC2, and RFID circuit 3 corresponds to NFC3. In this way, the corresponding writing pen information can be detected and transmitted through the RFID circuits, thereby realizing the detection of the writing pen status and the identification of the writing pen type.

[0041] The RFID circuit 16 includes a control chip 161, a signal transmission circuit 162 connected to the control chip 161, and an antenna 163 connected to the signal transmission circuit 162. The antenna 163 receives signals from the NFC card 15, i.e., the characteristic signal of the writing pen, and transmits these signals to the control chip 161 via the signal transmission circuit 162. The control chip 161 then processes the signals and transmits the corresponding information to the main controller 13 using communication methods such as UART, USART, SPI, or IIC.

[0042] When in operation, the interactive display system is in the state of detecting NFC cards, reading NFC cards, and writing NFC cards.

[0043] When the writing pen 14 is removed from the pen case cavity 12, the RFID circuit 16 cannot detect the corresponding NFC card 15, and the main controller 13 does not receive the NFC card 15 response signal and NFC card feature information received by the RFID circuit 16. The main controller 13 recognizes the writing pen 14 as having been removed from the pen case cavity 12 based on the feature information of the NFC card 15.

[0044] When the writing pen 14 is placed back into the pen case cavity 12, the RFID circuit 16 detects the corresponding NFC card 15. The main controller 13 receives the response signal from the NFC card 15 and the NFC card's feature information received by the RFID circuit 16. Based on the received pen return signal and the writing pen's feature signal, the main controller 13 identifies that the writing pen 14 has been placed back into the pen case cavity 12.

[0045] When another NFC card that does not belong to the interactive display system is inserted, the RFID circuit 16 detects the NFC card 15. The main controller 13 receives the response signal of the NFC card 15 and the feature information of the NFC card received by the RFID circuit 16. If the feature information of the NFC card is inconsistent with that in the memory, the main controller 13 can determine that the NFC card does not belong to the system.

[0046] The control chip 161 includes a signal output port MISO, a signal input port MOSI, and a clock signal port SCK, all connected to the main controller 13. The clock signal port SCK is used to transmit clock signals between the control chip 161 and the main controller 13 to achieve synchronization between them.

[0047] The signal output port MISO, signal input port MOSI, and clock signal port SCK are SPI ports. Of course, in other embodiments of this application, the signal output port MISO and signal input port MOSI can also be I2C ports or serial ports, corresponding to I2C communication or serial communication. That is, the signal output port MISO and signal input port MOSI can be UART ports, USART ports, SPI ports, or IIC ports; no specific limitations are imposed here.

[0048] The control chip 161 includes a first signal transmission port TX1, a second signal transmission port TX2, and a signal reception port RX, which are connected to the signal transmission circuit 162.

[0049] The first signal transmitting port TX1, the second signal transmitting port TX2, and the signal receiving port RX are SPI ports.

[0050] The control chip 161 receives the card search command transmitted by the main controller 13 through the signal input port MOSI, and transmits it to the antenna 163 via the signal transmission circuit 162 through the first signal transmission port TX1 and the second signal transmission port TX2. The antenna 163 then transmits the card search command in the form of electromagnetic waves. The control chip 161 can be an existing control chip or an integrated circuit assembly composed of multiple electronic devices, as long as it can realize the above-mentioned signal transmission function. The control chip 161 is preferably a VRC522 chip.

[0051] Referring again to Figure 6, the RFID circuit 16 also includes a clock generation circuit. This clock generation circuit includes a crystal oscillator Y1, a first capacitor C1, and a second capacitor C2. One end of the crystal oscillator Y1 is connected to pin 21 of the control chip 161 and grounded through the second capacitor C2. The other end of the crystal oscillator Y1 is connected to pin 22 of the control chip 161 and grounded through the first capacitor C1.

[0052] The signal transmission circuit 162 includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a first inductor L1, and a second inductor L2. The signal receiving port RX of the control chip 161 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to pin 16 of the control chip 161 through the second resistor R2. Pin 16 of the control chip 161 is also grounded through the fourth capacitor C4. The other end of the first resistor R1 is connected to one end of the fifth capacitor C5 through the third capacitor C3. The other end of the fifth capacitor C5 is connected to the second signal transmitting port TX2 of the control chip 161 through the first inductor L1 and is grounded through the sixth capacitor C6. One end of the fifth capacitor C5 is also grounded through both the eighth capacitor C8 and the tenth capacitor C10, and is also connected to one end of the antenna 163 through the third resistor R3. One end of the second inductor L2 is connected to the first signal transmission port TX1 of the control chip 161. The other end of the second inductor L2 is grounded through the seventh capacitor C7, and is connected to one end of the ninth capacitor C9, one end of the eleventh capacitor C11, and one end of the fourth resistor R4 through the twelfth capacitor C12. The other ends of the ninth capacitor C9 and the eleventh capacitor C11 are grounded, and the other end of the fourth resistor R4 is connected to the other end of the antenna 163.

[0053] The main controller 13 is provided with a storage unit (not shown) for storing feature information of at least one writing pen 14.

[0054] In actual use, the RFID circuit 16 needs to be initialized first, setting various parameters of the module. Then, the main controller 13 sends a card search command to the control chip 161 of the RFID circuit 16. At this time, the RFID circuit 16 can work in card search mode. The RFID circuit 16 transmits the card search command to the antenna 163 through the first signal transmission port TX1 and the second signal transmission port TX2. The antenna 163 transmits the carrier wave carrying the card search command in the form of electromagnetic waves. When an NFC card 15 approaches, the NFC card 15 receives the command and sends back a response signal. The response signal is received by the antenna 163 and transmitted to the signal receiving port RX. The control chip 161 in the RFID circuit 16 processes the signal receiving port RX signal and converts it into an SPI communication signal, which is transmitted to the main controller 13 through the signal output port MISO. The main controller 13 compares the detected NFC card feature information with the NFC card feature information stored in the storage unit. If the detected NFC card information is different from the stored NFC card information, the main controller 13 knows that the detected NFC card does not exist. If no NFC card 15 is detected, the antenna 163 will emit electromagnetic waves to send a card reading command, but since there is no NFC card present, it will not receive an NFC card response signal. The main controller 13 will then know that no NFC card has been detected.

[0055] The main controller 13 can be an existing processor chip or an integrated circuit assembly composed of multiple electronic devices, as long as it can realize the above-mentioned signal transmission and comparison functions, and no specific restrictions are imposed here.

[0056] In summary, the interactive display screen provided in this embodiment includes a touch writing screen; a pen box cavity, configured to hold a writing pen, the writing pen having an NFC card inside, the NFC card storing the writing pen's feature information, and at least one RFID circuit corresponding to the NFC card inside the pen box cavity; and a main controller, electrically connected to the touch writing screen and the RFID circuit, capable of real-time detection of the writing pen's status and real-time identification of the writing pen's type.

[0057] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. It should be noted that, for those skilled in the art, several equivalent obvious modifications and / or equivalent substitutions can be made without departing from the technical principles of this application, and these obvious modifications and / or equivalent substitutions should also be considered within the scope of protection of this application.

Claims

1. An interactive display screen, comprising: Touchscreen writing display; The pen case cavity is designed to hold a writing pen. An NFC card is installed inside the writing pen. The NFC card stores the characteristic information of the writing pen. At least one RFID circuit corresponding to the NFC card is installed inside the pen case cavity. The main controller is electrically connected to the touch writing screen and the RFID circuit.

2. The interactive display screen according to claim 1, wherein, The pen box cavity is located below, above, or on the back of the touch writing screen.

3. The interactive display screen according to claim 1, wherein, The pen box cavity is located directly below, to the lower right or to the lower left of the touch writing screen.

4. The interactive display screen according to claim 1, wherein, The interactive display screen includes multiple RFID circuits, each of which corresponds to an NFC card located in the writing pen.

5. The interactive display screen according to claim 1, wherein, The RFID circuit includes a control chip, a signal transmission circuit connected to the control chip, and an antenna connected to the signal transmission circuit.

6. The interactive display screen according to claim 5, wherein the RFID circuit further includes a clock generation circuit, the clock generation circuit including a crystal oscillator, a first capacitor and a second capacitor, one end of the crystal oscillator being connected to pin 21 of the control chip and grounded through the second capacitor, and the other end of the crystal oscillator being connected to pin 22 of the control chip and grounded through the first capacitor.

7. The interactive display screen according to claim 5, wherein, The control chip includes a VRC522 chip.

8. The interactive display screen according to claim 5, wherein, The signal transmission circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a first inductor, and a second inductor. Pin 16 of the control chip is grounded through the fourth capacitor. The other end of the first resistor is connected to one end of the fifth capacitor through the third capacitor. The other end of the fifth capacitor is connected to the second signal transmission port of the control chip through the first inductor and grounded through the sixth capacitor. One end of the fifth capacitor is also grounded through the eighth and tenth capacitors, and connected to one end of the antenna through the third resistor. One end of the second inductor is connected to the first signal transmission port of the control chip. The other end of the second inductor is grounded through the seventh capacitor and connected to one end of the ninth capacitor, one end of the eleventh capacitor, and one end of the fourth resistor through the twelfth capacitor. The other ends of the ninth and eleventh capacitors are grounded. The other end of the fourth resistor is connected to the other end of the antenna.

9. The interactive display screen according to claim 5, wherein, The control chip includes a signal output port, a signal input port, and a clock signal port that are connected to the main controller.

10. The interactive display screen according to claim 9, wherein, The signal output port and the signal input port are one of UART port, USART port, SPI port or IIC port.

11. The interactive display screen according to claim 5, wherein, The control chip includes a first signal transmitting port, a second signal transmitting port, and a signal receiving port connected to the signal transmission circuit.

12. The interactive display screen according to claim 11, wherein, The first signal transmitting port, the second signal transmitting port, and the signal receiving port are SPI ports.

13. The interactive display screen according to claim 1, wherein, The main controller is equipped with a storage unit for storing feature information of at least one of the writing pens.

14. An interactive display system, the interactive display system comprising: At least one writing pen and an interactive display screen as described in any one of claims 1-13, wherein the writing pen is provided with the NFC card, the NFC card stores the feature information of the writing pen, and the pen case cavity is provided with at least one RFID circuit corresponding to the NFC card.

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