Large interactive display screen and interactive display system
By setting an NFC card and an RFID circuit of an interactive display screen in the writing pen and combining it with a main controller, the problem of misidentification of the writing pen's placement status in the existing technology is solved, and real-time detection and accurate identification of the writing pen's status are achieved.
Patent Information
- Application Number
- CN202422867298.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing interactive display screens are prone to misidentifying the placement and removal status of writing pens, and are difficult to identify multiple types of pens.
The NFC card is used to store the characteristic information of the writing pen, and the RFID circuit and the main controller are combined to realize real-time detection and identification of the status and type of the writing pen through electrical connection.
It realizes real-time detection and accurate identification of the writing pen status, avoids misidentification, and supports the identification of multiple types of pens.
Smart Images
Figure CN223390105U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of display devices, and more specifically, relates to an interactive display large screen and an interactive display system. Background Art
[0002] Existing touch screens generally place the writing pen on the side or bottom of the screen, and use infrared or Hall sensors to detect the placement of the writing pen.
[0003] Infrared detection is easily affected by light, resulting in detection errors and misidentification of the pen's placement. It also has difficulty identifying multiple pen types. Hall effect sensors are easily affected by magnetic fields. Utility Model Content
[0004] The purpose of the embodiments of the present application is to provide an interactive display large screen and an interactive display system, aiming to solve the technical problem in the prior art that interactive display large screens are prone to misidentification.
[0005] To achieve the above-mentioned purpose, according to one aspect of the present application, an interactive display large screen is provided, including: a touch writing screen; a pen box cavity, configured to place a writing pen, an NFC card is provided inside the writing pen, and 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 box cavity; a main controller, electrically connected to the touch writing screen and the RFID circuit.
[0006] Optionally, the pen box cavity is located below, above or on the back of the touch writing screen.
[0007] Optionally, the pen box cavity is located directly below, to the lower right, or to the lower left of the touch writing screen.
[0008] Optionally, the interactive display screen includes a plurality of the RFID circuits, and each of the RFID circuits corresponds to an NFC card provided in the writing pen.
[0009] 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.
[0010] Optionally, the control chip includes a signal output port, a signal input port and a clock signal port connected to the main controller.
[0011] Optionally, the signal output port and the signal input port are one of a UART port, a USART port, an SPI port, and an IIC port.
[0012] Optionally, the control chip includes a first signal sending port, a second signal sending port and a signal receiving port connected to the signal transmission circuit.
[0013] Optionally, the RFID circuit establishes a connection with the main controller via UART, USART, SPI or IIC communication.
[0014] Optionally, a storage unit is provided in the main controller for storing characteristic information of at least one of the writing pens.
[0015] To achieve the above-mentioned purpose, according to another aspect of the present application, an interactive display system is provided, including: at least one writing pen and the aforementioned interactive display screen, an NFC card is provided inside the writing pen, 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 box cavity of the interactive display screen.
[0016] The beneficial effects of the present application are: the interactive display large screen of the present application includes a touch writing screen; a pen box cavity is configured to place a writing pen, an NFC card is provided inside the writing pen, the NFC card stores characteristic information of the writing pen, and at least one RFID circuit corresponding to the NFC card is provided inside the pen box cavity; a main controller electrically connected to the touch writing screen and the RFID circuit can correspond to the NFC card provided inside the writing pen through the RFID circuit provided inside the pen box cavity, thereby realizing real-time detection of the writing pen status and real-time identification of the writing pen type. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical features of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.
[0018] Figure 1 A schematic diagram of the structure of the interactive display screen provided in an embodiment of the present application;
[0019] Figure 2 A schematic diagram of the installation of an interactive display screen provided in an embodiment of the present application;
[0020] Figure 3 A schematic structural diagram of a writing pen provided in an embodiment of the present application;
[0021] Figure 4 A schematic diagram of the installation of an RFID circuit in a pencil case cavity provided in an embodiment of the present application;
[0022] Figure 5A functional diagram of the interactive display screen provided in an embodiment of the present application;
[0023] Figure 6 A schematic diagram of the structure of the RFID circuit provided in an embodiment of the present application.
[0024] The reference numerals used in the above drawings are as follows:
[0025] 11. Touch 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 DESCRIPTION
[0026] In order to have a clearer understanding of the technical features, purposes, and effects of the present application, the specific embodiments of the present application are described in further detail below in conjunction with the accompanying drawings and Examples. The following examples are only used to illustrate the present application, but are not used to limit the scope of protection of the present application. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without paying creative work should all fall within the scope of protection of the present application.
[0027] In the description of this application, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting this application.
[0028] In the description of this application, it should be understood that the numbers themselves, such as "first", "second", etc., are only used to distinguish the objects described, and have no sequential or technical meaning, and cannot be understood as stipulating or implying the importance of the objects described.
[0029] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0030] In this application, the term "plurality" refers to two or more than two. Furthermore, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.
[0031] 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 meanings as those commonly understood by those skilled in the art. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. Those of ordinary skill in the art will understand the specific meanings of the above terms in this application in specific circumstances.
[0032] As described in the background technology, the existing technology uses infrared or Hall sensors to detect the placement status of the writing pen, but infrared detection is easily affected by light, resulting in detection errors, and is prone to misidentification of the placement status of the writing pen. It is also difficult to identify multiple types of pens, and the use of Hall sensors is easily affected by magnetic fields and is prone to misidentification.
[0033] In order to solve the above problems, according to one aspect of the present application, an interactive display system is provided, comprising at least one writing pen and an interactive display screen. A near field communication (NFC) card is provided inside the writing pen, and the NFC card stores characteristic information of the writing pen. At least one RFID circuit corresponding to the NFC card is provided inside the pen case cavity. Each NFC card matches at least one RFID circuit provided in the interactive display screen. If the NFC card provided inside the writing pen does not match any RFID circuit in the interactive display screen, it means that the writing pen does not belong to the interactive display system. The specific structure of the interactive display screen will be described later.
[0034] Reference Figure 1-4To solve the above-mentioned problems, according to one aspect of the present application, an embodiment of the present application provides an interactive display screen, which includes a touch screen 11. A pen box cavity 12 is configured to accommodate a writing pen 14. A near field communication (NFC) card 15 is provided inside the writing pen 14. The NFC card 15 stores characteristic information of the writing pen 14. At least one radio frequency identification (RFID) circuit 16 corresponding to the NFC card 15 is provided inside the pen box cavity 12. A main controller 13 is electrically connected to the touch screen 11 and the RFID circuit 16.
[0035] When the writing pen is taken out of the pen box cavity and the RFID circuit 16 cannot detect a certain NFC card 15, the RFID circuit 16 sends a corresponding pen removal signal and the characteristic signal of the writing pen 14 to the main controller 13. The main controller 13 recognizes that a certain type of writing pen 14 has been taken out of the pen box cavity.
[0036] When the writing pen is put back into the pen box cavity and the RFID circuit 16 detects a certain 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 uses this to identify that a certain type of writing pen has been put back into the pen box cavity.
[0037] 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 foreign signal to the main controller 13, and the main controller 13 determines that the NFC card does not belong to the interactive display system.
[0038] In the embodiment of the present application, the pen box cavity is located below, above or behind the touch screen. More specifically, the pen box cavity can be located directly below, to the lower right or to the lower left of the touch screen. Figure 2 The middle pen box cavity 12 is located at the lower right position of the touch screen 11. As can be seen, the position of the pen box cavity is flexible and the position and structure can be adjusted as needed.
[0039] When multiple writing pens 14 are placed in the pen box cavity, the interactive display screen of the embodiment of the present application includes multiple RFID circuits 16. Each RFID circuit 16 corresponds to an NFC card 15 set in the writing pen 14. For example Figure 3The three RFID circuits 16 are all connected to the main controller 13, and each RFID circuit corresponds to an 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 RFID circuits can detect and transmit the corresponding stylus information, thereby realizing the detection of the stylus status and the identification of the stylus type.
[0040] 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 the signal from the NFC card 15, i.e., the characteristic signal of the writing pen, and transmits it to the control chip 161 through the signal transmission circuit 162. After being processed by the control chip 161, the corresponding information is transmitted to the main controller 13 via a communication method such as UART, USART, SPI, or IIC.
[0041] When the interactive display system is working, it is in the states of detecting NFC cards, reading NFC cards, and writing NFC cards.
[0042] When the writing pen is removed from the pen case cavity, the RFID circuit 16 cannot detect the corresponding NFC card 15, and the main controller 13 cannot receive the response signal and NFC card characteristic information of the NFC card 15 received by the RFID circuit 16. The main controller 13 recognizes that the writing pen 14 has been removed from the pen case cavity based on the characteristic information of the NFC card 15.
[0043] When the writing pen is returned to the pen case cavity, the RFID circuit 16 detects the corresponding NFC card 15, and the main controller 13 receives the response signal and NFC card characteristic information from the RFID circuit 16. Based on the received pen return signal and the writing pen characteristic signal, the main controller 13 recognizes that the writing pen 14 has been returned to the pen case cavity.
[0044] When another NFC card that does not belong to the interactive display system is inserted, the RFID circuit detects the NFC card 15, and the main controller 13 receives the response signal of the NFC card 15 and the NFC card feature information received by the RFID circuit 16. The main controller 13 compares the feature information of the NFC card with the memory and finds that they are inconsistent. The main controller can then determine that the NFC card does not belong to the system.
[0045] The control chip 161 includes a signal output port MISO, a signal input port MOSI, and a clock signal port SCK connected to the main controller 13. The clock signal port SCK is used to transmit a clock signal between the control chip 161 and the main controller 13 to achieve synchronization between the control chip 161 and the main controller 13.
[0046] The signal output port MISO, the signal input port MOSI, and the clock signal port SCK are SPI ports. Of course, in other embodiments of the present application, the signal output port MISO and the signal input port MOSI may also be I2C ports or serial ports, correspondingly using I2C communication or serial communication. That is, the signal output port and the signal input port may be UART ports, USART ports, SPI ports, or IIC ports, without specific limitation herein.
[0047] The control chip 161 includes a first signal transmitting port TX1 , a second signal transmitting port TX2 , and a signal receiving port RX connected to the signal transmission circuit 162 .
[0048] The first signal transmitting port TX1 , the second signal transmitting port TX2 and the signal receiving port are SPI ports.
[0049] Control chip 161 receives the card search command transmitted by main controller 13 via signal input port MOSI. It then transmits the card search command to antenna 163 via first and second signal transmission ports TX1 and TX2 via signal transmission circuit 162. Antenna 163 then transmits the card search command in the form of electromagnetic waves. Control chip 161 can be an existing control chip or an integrated circuit assembly composed of multiple electronic components, as long as it can perform the aforementioned signal transmission function. Preferably, control chip 161 is a VRC522 chip.
[0050] Continue to see 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 is grounded via the first capacitor C1. The other end of the crystal oscillator Y1 is connected to pin 22 of the control chip 161 and is connected via the second capacitor C2.
[0051] 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. The other end of the first resistor R1 is connected to pin 16 of the control chip 161 via the second resistor R2. Pin 16 of the control chip 161 is also grounded via the fourth capacitor C4. The other end of the first resistor R1 is connected to one end of the fifth capacitor C5 via 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 via the first inductor L1 and to ground via the sixth capacitor. One end of the fifth capacitor C5 is also grounded via the eighth capacitor C8 and the tenth capacitor C10, respectively. It is also connected to one end of the antenna 163 via the third resistor R3. One end of the second inductor L2 is connected to the first signal sending port TX1 of the control chip 161, the other end of the second inductor L2 is grounded through the seventh capacitor, 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, the other end of the ninth capacitor C9 and the other end of the eleventh capacitor C11 are grounded, and the other end of the fourth resistor is connected to the other end of the antenna 163.
[0052] The main controller 13 is provided with a storage unit (not shown) for storing characteristic information of at least one writing pen 14 .
[0053] During actual use, the RFID circuit 16 must first be initialized and the various module parameters set. The main controller 13 then sends a card search command to the control chip 161 of the RFID circuit 16. At this point, the RFID circuit 16 operates in card search mode. The RFID circuit 16 transmits the card search command to the antenna 163 via the first signal transmission port TX1 and the second signal transmission port TX2. Antenna 163 then transmits the carrier wave carrying the card search command as 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 antenna 163 and transmitted to the signal receiving port RX. The control chip 161 within the RFID circuit 16 then processes the signal at the signal receiving port RX and converts it into an SPI communication signal. This signal is then transmitted to the main controller 13 via the signal output port MISO. The main controller 13 then compares the detected NFC card feature information with the NFC card feature information stored in the storage unit. If the detected NFC card information differs from the stored NFC card information, the main controller 13 determines that the NFC card is not present. If no NFC card 15 is detected, the antenna 163 will emit electromagnetic waves of a card reading instruction, but since there is no NFC card, no response signal from the NFC card will be received, and the main controller 13 will know that no NFC card is detected.
[0054] The main controller 13 can be an existing processor chip or an integrated circuit component composed of multiple electronic devices, as long as it can realize the above-mentioned signal transmission function and comparison function, and is not specifically limited here.
[0055] In summary, the interactive display large screen provided in this embodiment includes a touch writing screen; a pen box cavity, which is configured to place a writing pen, an NFC card is provided inside the writing pen, and 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 box cavity; a main controller, which is electrically connected to the touch writing screen and the RFID circuit, can realize real-time detection of the writing pen status and real-time identification of the writing pen type.
[0056] The above is only a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, several equivalent obvious variations and / or equivalent replacements can be made, and these obvious variations and / or equivalent replacements should also be regarded as within the scope of protection of the present application.
Claims
1. An interactive display screen, characterized in that: include: Touch writing screen; A pen case cavity is configured to accommodate a writing pen, wherein an NFC card is disposed inside the writing pen, wherein the NFC card stores characteristic information of the writing pen, and at least one RFID circuit corresponding to the NFC card is disposed inside the pen case cavity; A main controller is electrically connected to the touch writing screen and the RFID circuit.
2. The interactive display screen according to claim 1, characterized in that: 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, characterized in that: 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, characterized in that: The interactive display screen includes a plurality of RFID circuits, and each RFID circuit corresponds to an NFC card set in the writing pen.
5. The interactive display screen according to claim 1, characterized in that: 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, characterized in that: The control chip includes a signal output port, a signal input port and a clock signal port connected to the main controller.
7. The interactive display screen according to claim 6, characterized in that: The signal output port and the signal input port are one of a UART port, a USART port, an SPI port or an IIC port.
8. The interactive display screen according to claim 5, characterized in that: The control chip includes a first signal sending port, a second signal sending port and a signal receiving port connected to the signal transmission circuit.
9. The interactive display screen according to claim 1, characterized in that: The main controller is provided with a storage unit for storing characteristic information of at least one of the writing pens.
10. An interactive display system, characterized in that: The interactive display system includes: at least one writing pen and an interactive display screen as described in any one of claims 1 to 9, an NFC card is provided inside the writing pen, and the NFC card stores characteristic information of the writing pen, and at least one RFID circuit corresponding to the NFC card is provided inside the pen box cavity of the interactive display screen.