Raspberry Pi intelligent practice digital panel

Abstract

The invention discloses a Raspberry Pi intelligent practice digital panel, and belongs to the technical field of intelligent input equipment. Comprising a shell, a mounting groove is formed in the right side of the shell, a digital panel is fixedly connected into the mounting groove, bayonets are symmetrically formed in the left side of the shell, a display screen is connected into the upper bayonet in a clamped mode, and a keyboard bottom plate with holes is connected into the lower bayonet in a clamped mode; the rear surface of the display screen is fixedly connected with a circuit board; according to the Raspberry Pi intelligent practice digital panel, hardware and software functions are deeply integrated, the core pain point that a traditional digital panel only records and has no guidance is effectively solved, and intelligent and multi-dimensional practice support is provided for a user. In the hardware level, a pressure sensor and a coordinate sensor of the digital panel can accurately capture detail data of writing / drawing tracks, and a built-in raspberry Pi main control chip of the circuit board is matched.

Description

Technical Field

[0001] This invention relates to intelligent input device technology, and more particularly to a Raspberry Pi intelligent practice tablet. Background Technology

[0002] Currently, graphics tablets are widely used as common tools in calligraphy, painting, and other fields, and are applied in personal practice and teaching training. However, existing technologies still have many problems that urgently need to be solved. On the one hand, traditional graphics tablets have limited functions, mostly only possessing basic writing / drawing signal transmission capabilities. They cannot intelligently analyze and guide the user's practice process. When using them, users can only adjust their movements based on subjective judgment, making it difficult to know key parameters such as the accuracy of writing or drawing and the smoothness of lines, resulting in low practice efficiency, especially for novice users. Furthermore, most traditional graphics tablets rely on a fixed power supply and lack portable design, failing to meet the needs of users in outdoor or temporary teaching locations where there is no fixed power supply. On the other hand, existing graphics tablets with some intelligent functions suffer from poor expandability and insufficient interactive experience. These devices often adopt an all-in-one structure, making it impossible to connect external storage devices, large-screen displays, etc., according to user needs, and thus difficult to adapt to diverse scenarios such as teaching demonstrations and team collaboration. Furthermore, feedback methods are limited, mostly presenting simple data on the screen, lacking interactive designs such as audio guidance and multi-button shortcuts, failing to provide users with an immersive and convenient learning experience. In addition, some intelligent graphics tablets are expensive and have poor hardware and software compatibility, making it difficult for ordinary users to upgrade functions according to their needs, thus limiting their widespread application. These technical pain points make the market urgently need a graphics tablet product that combines intelligence, portability, and strong expandability. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to solve the problems of traditional digital tablets, which can only realize basic writing / drawing signal transmission, lack intelligent feedback functions for practice scenarios, and have a single input method that cannot meet users' needs for real-time guidance on practice results; Another purpose of this invention is to solve the problems that existing intelligent practice devices are mostly fixed structures, not easy to carry, and have poor flexibility in functional expansion.

[0004] Technical solution: A Raspberry Pi smart practice tablet includes a shell. The right side of the shell has a mounting slot, and the tablet is fixedly connected inside the mounting slot. The left side of the shell has symmetrical slots. The upper slot is fitted with a display screen, and the lower slot is fitted with a perforated keyboard base plate. A circuit board is fixedly connected to the rear surface of the display screen.

[0005] Furthermore, speakers are symmetrically soldered to the top of the front surface of the circuit board, a power indicator light is soldered to the left side of the front surface of the circuit board, and a charging indicator light is fixedly connected to the left side of the front surface of the circuit board, below the power indicator light.

[0006] Furthermore, a power interface is soldered to the upper right side of the rear surface of the circuit board, a MIPI protocol screen interface is soldered to the upper left side of the rear surface of the circuit board, an antenna interface is soldered to the right side of the MIPI protocol screen interface on the upper rear surface of the circuit board, and a USB-A interface, a Type-C charging interface, a micro HDMI interface, and a 3.5mm headphone jack are soldered downwards on the left side of the rear surface of the circuit board in sequence.

[0007] Furthermore, a TF card slot is soldered to the lower rear surface of the circuit board, a power button is soldered to the lower rear surface of the circuit board below the TF card slot, and a universal 40-pin connector is soldered to the lower rear surface of the circuit board to the right of the TF card slot.

[0008] Furthermore, an expansion board interface is soldered to the right side of the rear surface of the circuit board.

[0009] Furthermore, a multi-functional hole is provided between the two bayonets, and a multi-functional button is soldered to the front surface of each circuit board. An mounting sleeve is snapped onto the outer wall of each multi-functional button, and the mounting sleeve is slidably connected to the interior of the adjacent multi-functional hole.

[0010] Furthermore, on the front surface of the circuit board, below the perforated keyboard base plate, there are keyboard buttons. Multiple keycaps are internally engaged with the keyboard buttons, and the keycaps are in contact with the keyboard buttons.

[0011] Furthermore, the multi-function buttons include: gamepad directional buttons, mouse buttons, physical mini trackball, gamepad function buttons, exit button, start button, enter button, and tab button.

[0012] Furthermore, a battery compartment is fixedly connected to the lower rear surface of the circuit board.

[0013] Beneficial Effects: This Raspberry Pi Smart Practice Tablet effectively addresses the core pain point of traditional tablets—"only recording, no guidance"—by deeply integrating hardware and software functions, providing users with intelligent, multi-dimensional practice support. At the hardware level, the tablet's pressure and coordinate sensors accurately capture detailed data of writing / drawing trajectories. Combined with the Raspberry Pi main control chip built into the circuit board, it can quickly run practice algorithms such as stroke similarity comparison and line smoothness analysis. At the feedback level, the display screen simultaneously presents real-time trajectories, scoring results, and optimization suggestions, while the speaker or 3.5mm headphone jack provides audio guidance, forming a dual feedback system of "visual + auditory." Simultaneously, the combination of multi-function buttons, a perforated keyboard base, and keyboard buttons enriches input methods, allowing users to flexibly switch operating modes. This closed-loop design of "accurate input - intelligent processing - multi-dimensional feedback" allows users to promptly identify problems and adjust their movements during practice, avoiding blind practice. Compared to traditional tablets, practice efficiency is improved by more than 50%, and the interactive experience is closer to real teaching scenarios, making it especially suitable for calligraphy, painting, and other practice needs requiring detailed guidance. This device boasts significant advantages in structural design and functional expansion, meeting both daily portability needs and flexibly adapting to functional upgrades in various scenarios. Regarding portability, the snap-fit ​​design of the casing allows for easy removal of the display screen and perforated keyboard base, reducing the overall size and weight of the device, making it easy for users to carry to homes, classrooms, and outdoor locations. The battery compartment eliminates reliance on a fixed power source, supporting 4-6 hours of offline practice. In terms of expandability, the circuit board is equipped with a TF card slot, USB-A interface, micro HDMI interface, universal 40-pin interface, and expansion board interface, enabling multi-dimensional functional extensions. The TF card slot and USB-A interface support massive data storage and export of practice materials, the micro HDMI interface allows connection to a large-screen display for teaching demonstrations, and the expansion board interface and universal 40-pin interface can connect to additional sensors, control modules, etc., achieving functional upgrades. This "portable foundation + flexible expansion" design allows the device to meet individual daily practice needs as well as be adapted to training institutions, team collaboration, and other scenarios, significantly broadening its applicability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 A magnified structural diagram at point A; Figure 3 This is a front view of the circuit board of the present invention; Figure 4 This is a rear view of the circuit board of the present invention.

[0015] In the diagram: 1. Outer shell; 2. Mounting slot; 3. Graphics tablet; 4. Bayonet; 5. Display screen; 6. Keyboard base with holes; 7. Circuit board; 8. Speaker; 9. Power indicator light; 10. Charging indicator light; 11. Power interface; 12. MIPI protocol screen interface; 13. Antenna interface; 14. USB-A interface; 15. Type-C charging interface; 16. Mini HDMI interface; 17. 3.5mm headphone jack; 18. TF card slot; 19. Power button; 20. Expansion board interface; 21. Multi-function hole; 22. Multi-function button; 23. Mounting sleeve; 24. Universal 40-pin interface; 25. Keyboard buttons; 26. Keycaps; 27. Battery compartment; 2201. Controller directional pad; 2202. Mouse buttons; 2203. Physical mini trackball; 2204. Controller function buttons; 2205. Exit button; 2206. Start button; 2207. Enter key; 2208. Tab key. Detailed Implementation

[0016] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example like Figures 1-4 As shown, a Raspberry Pi smart practice tablet is provided, including a shell 1. A mounting slot 2 is provided on the right side of the shell 1, and a tablet 3 is fixedly connected inside the mounting slot 2. A bayonet 4 is symmetrically provided on the left side of the shell 1. A display screen 5 is snapped into the upper bayonet 4, and a keyboard base plate with holes is snapped into the lower bayonet 4. A circuit board 7 is fixedly connected to the rear surface of the display screen 5. A speaker 8 is symmetrically soldered to the upper front surface of the circuit board 7. A power indicator light 9 is soldered to the left front surface of the circuit board 7. A charging indicator light 10 is fixedly connected to the left front surface of the circuit board 7 below the power indicator light 9. A power interface 11 is soldered to the upper right side of the rear surface of the circuit board 7. A MIPI protocol screen interface 12 is soldered to the upper left side of the rear surface of the circuit board 7. An antenna interface 13 is soldered to the upper right side of the MIPI protocol screen interface 12. A USB-A interface 14, a Type-C charging interface 15, a micro HDMI interface 16, and a 3.5mm headphone jack 17 are soldered downwards from the left rear surface of the circuit board 7. Power is supplied via the Type-CC charging port 15 on the left rear surface of circuit board 7, connecting to an external power source. Current is transmitted to the power management module of circuit board 7. At this time, the power indicator 9 on the left front surface of circuit board 7 lights up green, indicating that the device is powered on. The charging indicator 10 is initially red to indicate battery charging. If a built-in battery is used, it turns green and stays lit after charging is complete. Then, circuit board 7, as the core control unit, starts the built-in Raspberry Pi main control chip and sends a start signal to the display screen 5, which is locked in the upper slot 4, through the MIPI protocol screen interface 12. The display screen 5 lights up and enters standby mode. Subsequently, circuit board 7 detects the perforated keyboard base plate 6 locked in the lower slot 4 through a preset circuit and establishes a signal connection, enabling it to enter the input state. At the same time, the antenna interface 13 on the rear surface of circuit board 7 starts searching for and connecting to wireless networks. If network access is required, the USB-A interface 14, micro HDMI interface 16, and 3.5mm headphone jack 17 are in standby mode. The digitizer 3 in the mounting slot 2 establishes communication with circuit board 7 through the built-in data cable. The circuit board 7 sends a calibration signal to the digitizer 3. The digitizer 3 completes the initialization of parameters such as pressure sensing and coordinate positioning and feeds back a ready signal. Entering the core practice function operation phase, when the user writes or draws on the surface of the digitizer 3 with a stylus, the pressure sensor of the digitizer 3 detects the pressure value, and the coordinate sensor captures the position coordinates, converting the data into electrical signals and transmitting them to the circuit board 7. If text or commands need to be input, the user presses a key on the perforated keyboard base 6, which transmits the corresponding electrical signal to the circuit board 7. The circuit board 7 parses the signal and converts it into command or text data. The main control chip of the circuit board 7 then receives this input data and, combined with preset practice programs such as calligraphy scoring and drawing assistance, generates feedback results such as writing accuracy scores and line optimization suggestions. These results are then transmitted in real-time to the display screen 5 via the MIPI protocol screen interface 12, showing the writing trajectory, feedback text, and scoring charts. If the practice program has an audio prompt function, the circuit board 7 transmits the audio signal to the speakers 8 symmetrically soldered to the front surface to play the prompt sound.The 5mm headphone jack 17 automatically switches the audio signal to headphone output for private feedback. During data transfer and expansion, if practice data needs to be exported, a USB flash drive or external hard drive can be connected via the USB-A port 14. The circuit board 7 will then transfer internal practice records, writing files, and scoring data to an external storage device. It can also connect peripherals such as a mouse and keyboard to expand operation. For a larger display, an external monitor can be connected via the micro HDMI port 16. The circuit board 7 will then simultaneously transmit the content from the display screen 5 for dual-screen or large-screen viewing. For uploading data or downloading resources online, the circuit board 7 uses a wireless network connected via the antenna port 13 to complete the operation, processing the network signal in real-time to ensure stability. Simultaneously, the Type-CC charging port 15 provides continuous power and charges the battery. If needed, the power port 11 serves as a backup power source. Connecting an external DC power supply ensures normal device operation even in the event of a Type-CC interface failure. Finally, the device enters the shutdown and state switching phase. The user inputs a shutdown command via the perforated keyboard base 6 or presses and holds the preset shutdown button on the circuit board 7. If present, the circuit board 7 receives the command and sends a shutdown signal to all peripherals. The digitizer 3 stops sensing and enters sleep mode, the display 5 gradually dims, the speaker 8 stops audio output, the antenna interface 13 disconnects from the network, and the USB-A interface 14, mini HDMI interface 16, and 3.5mm headphone jack 17 cut off signal transmission and enter power-off mode. After all peripherals are shut down, the main control chip on the circuit board 7 executes the shutdown procedure to cut off the internal power supply circuit. The power indicator 9 and charging indicator 10 both turn off. If the device is still connected to power during shutdown, the charging indicator 10 remains red to continue charging the battery.

[0018] In this embodiment, a TF card slot 18 is soldered to the lower rear surface of the circuit board 7. A power button 19 is soldered to the lower rear surface of the circuit board 7, below the TF card slot 18. A universal 40-pin interface 24 is soldered to the lower rear surface of the circuit board 7, to the right of the TF card slot 18. An expansion board interface 20 is soldered to the right rear surface of the circuit board 7. A multi-function hole 21 is provided between the two bayonet slots 4. Multi-function buttons 22 are soldered to the front surface of the circuit board 7. Mounting sleeves 23 are snapped onto the outer walls of the multi-function buttons 22. All 23 are slidably connected to the interior of the adjacent multi-function hole 21. The front surface of the circuit board 7 is located below the perforated keyboard base plate 6 and keyboard buttons 25 are provided. Multiple keycaps 26 are snapped together inside the keyboard buttons 6. The keycaps 26 are in contact with the keyboard buttons 25. The multi-function buttons 22 include: gamepad directional keys 2201, mouse buttons 2202, physical mini trackball 2203, gamepad function keys 2204, exit key 2205, start key 2206, enter key 2207 and tab key 2208. A battery box 27 is fixedly connected to the lower rear surface of the circuit board 7. The device can be powered on by pressing and holding the power button 19 soldered to the bottom rear surface of the circuit board 7. If the device relies on the internal power supply, the battery compartment 27 fixedly connected to the bottom rear surface of the circuit board 7 will supply power to the circuit board 7. If an external power supply is required, it can be connected through the Type-CC charging port 15 on the left side of the rear surface of the circuit board 7. The current is transmitted to the power management module of the circuit board 7 through the port. At this time, the power indicator 9 on the left side of the front surface of the circuit board 7 lights up green to indicate that the device is powered on. The charging indicator 10 is initially red to indicate that the battery in the battery compartment 27 is charging. After charging is complete, it turns green and stays on. The circuit board 7, as the core control unit, starts the built-in Raspberry Pi. The main control chip is dispatched, and simultaneously, a start signal is sent to the display screen 5, which is locked in the upper slot 4, via the MIPI protocol screen interface 12. The display screen 5 lights up and enters standby mode. The circuit board 7 detects the TF card slot 18 soldered on the lower rear surface. If a TF card is inserted, a data connection is established to read practice resources or store data on the card. The universal 40-pin interface 24 located to the right of the TF card slot 18 on the lower rear surface and the expansion board interface 20 on the right side of the rear surface both enter standby mode and can be connected to the corresponding expansion module at any time. Then, the circuit board 7 detects the perforated keyboard base 6 locked in the lower slot 4 through a preset circuit and establishes a signal connection to enable it to... When the input state is entered, the keyboard button 25 located on the front surface of the circuit board 7 below the perforated keyboard base plate 6 is also activated. Multiple keycaps 26 inside the keyboard button 25 contact the keyboard button 25. Pressing the keycaps 26 will trigger the corresponding key function. The multi-function button 22 soldered on the front surface of the circuit board 7 includes the gamepad directional keys 2201, mouse buttons 2202, physical mini trackball 2203, gamepad function keys 2204, exit key 2205, start key 2206, enter key 2207, and tab key 2208. The mounting sleeve 23 that engages with the outer wall is slidably connected to the multi-function hole 21 opened between the two bayonet slots 4. At this time, the multi-function button 22 can be precisely operated by positioning it in the multi-function hole 21 through the mounting sleeve 23. The user can control the cursor movement through the gamepad directional buttons 2201, click the mouse button 2202, fine-tune the cursor position through the physical mini trackball 2203, trigger custom functions through the gamepad function button 2204, exit the current interface through the exit button 2205, start the program through the start button 2206, confirm the command through the enter key 2207, and indent the character through the tab key 2208. At the same time, the antenna interface 13 on the rear surface of the circuit board 7 starts searching for and connecting to the wireless network, and the USB-A interface 14, mini HDMI interface 16, and 3.The 5mm headphone jack 17 is in standby mode. The digitizer 3 in the mounting slot 2 establishes communication with the circuit board 7 via a built-in data cable. The circuit board 7 sends a calibration signal to the digitizer 3. The digitizer 3 completes the initialization of parameters such as pressure sensing and coordinate positioning and feeds back a ready signal. Entering the core practice function operation stage, when the user writes or draws on the surface of the digitizer 3 with a stylus, the pressure sensor of the digitizer 3 detects the pressure value, and the coordinate sensor captures the position coordinates, converting the data into electrical signals and transmitting them to the circuit board 7. If text or commands need to be input, the user can press the keys on the perforated keyboard base 6, or press the keycaps 26 on the keyboard button 25, or operate the corresponding keys in the multi-function button 22. These input devices transmit electrical signals. The data is then processed by circuit board 7, which converts it into instructions or text data. The main control chip on circuit board 7 receives this input data and, in conjunction with preset practice programs such as calligraphy scoring and drawing assistance, generates feedback results such as writing accuracy scores and line optimization suggestions. These results, including the writing trajectory, feedback text, and scoring charts, are transmitted in real-time to display screen 5 via the MIPI protocol screen interface 12 for simultaneous display. If the practice program has an audio prompt function, circuit board 7 transmits the audio signal to the speakers symmetrically soldered to the front surface to play the prompt tone. If a 3.5mm headphone jack 17 is connected, the audio signal automatically switches to headphone output. During the data transmission and expansion function phase, if practice data needs to be exported, it can be done via USB- USB-A interface 14 connects to a USB flash drive or external hard drive, or a TF card inserted through TF card slot 18 stores data. Circuit board 7 transmits internal practice records to the corresponding storage device. It can also connect peripherals such as a mouse and keyboard via USB-A interface 14 to expand operation. For a larger external display, it connects via micro HDMI interface 16, allowing circuit board 7 to synchronously transmit content from display screen 5 for dual-screen or large-screen viewing. For uploading data or downloading resources online, circuit board 7 connects to a wireless network via antenna interface 13. It can also connect to an expansion board via expansion board interface 20 to add functionality. The universal 40-pin interface 24 connects to corresponding modules for hardware expansion. Meanwhile, the Type-CC charging interface 15 supports charging... The device continues to be powered and the battery in the battery box 27 is charged. The power interface 11 serves as a backup power interface. Connecting an external DC power supply can ensure normal operation of the device when the Type-CC interface fails. Finally, the device enters the shutdown and state switching stage. The user can input the shutdown command through the perforated keyboard base 6, press the exit key 2205 in the multi-function key 22 in combination with the start key 2206 to trigger shutdown, or press and hold the power button 19 on the rear surface of the circuit board 7. After receiving the command, the circuit board 7 sends a shutdown signal to all peripherals. The digitizer 3 stops sensing and enters sleep mode. The display screen 5 gradually turns off, the speaker 8 stops audio output, the antenna interface 13 disconnects the network connection, and the USB-A interface 14, mini HDMI interface 16, and 3 are connected.The 5mm headphone jack 17, TF card slot 18, universal 40-pin connector 20, and expansion board connector 20 cut off signal transmission and enter a power-off state. The keyboard base 6 with holes, keyboard buttons 25, and multi-function keys 22 stop responding. After all peripherals are turned off, the main control chip on circuit board 7 executes the shutdown procedure to cut off the internal power supply circuit. The power indicator 9 and charging indicator 10 both turn off. If the device is still connected to power when powered off, the charging indicator 10 remains red, continuing to charge the battery in the battery compartment 27.

[0019] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A Raspberry Pi smart practice tablet, comprising a casing (1), characterized in that: The outer casing (1) has a mounting slot (2) on the right side, and a digital tablet (3) is fixedly connected inside the mounting slot (2). The outer casing (1) has symmetrically arranged slots (4) on the left side. The upper slot (4) is fitted with a display screen (5), and the lower slot (4) is fitted with a perforated keyboard base plate (6). The rear surface of the display screen (5) is fixedly connected with a circuit board (7).

2. The Raspberry Pi smart practice tablet according to claim 1, characterized in that: A speaker (8) is symmetrically soldered to the top of the front surface of the circuit board (7). A power indicator light (9) is soldered to the left side of the front surface of the circuit board (7). A charging indicator light (10) is fixedly connected to the left side of the front surface of the circuit board (7) below the power indicator light (9).

3. The Raspberry Pi smart practice tablet according to claim 2, characterized in that: A power interface (11) is soldered to the upper right side of the rear surface of the circuit board (7). A MIPI protocol screen interface (12) is soldered to the upper left side of the rear surface of the circuit board (7). An antenna interface (13) is soldered to the upper right side of the MIPI protocol screen interface (12) on the rear surface of the circuit board (7). A USB-A interface (14), a Type-C charging interface (15), a micro HDMI interface (16), and a 3.5mm headphone jack (17) are soldered to the lower left side of the rear surface of the circuit board (7).

4. A Raspberry Pi smart practice tablet according to claim 2, characterized in that: A TF card slot (18) is soldered to the lower rear surface of the circuit board (7). A power button (19) is soldered to the lower rear surface of the circuit board (7) below the TF card slot (18). A universal 40-pin interface (24) is soldered to the lower right side of the TF card slot (18) below the rear surface of the circuit board (7).

5. A Raspberry Pi smart practice tablet according to claim 2, characterized in that: An expansion board interface (20) is soldered to the right side of the rear surface of the circuit board (7).

6. A Raspberry Pi smart practice tablet according to claim 1, characterized in that: A multi-functional hole (21) is provided between the two bayonet slots (4). A multi-functional button (22) is welded to the front surface of the circuit board (7). An installation sleeve (23) is snapped onto the outer wall of the multi-functional button (22). The installation sleeve (23) is slidably connected to the interior of the adjacent multi-functional hole (21).

7. A Raspberry Pi smart practice tablet according to claim 2, characterized in that: On the front surface of the circuit board (7), a keyboard button (25) is provided below the perforated keyboard base plate (6). Multiple keycaps (26) are engaged inside the keyboard button (6), and the keycaps (26) are in contact with the keyboard button (25).

8. A Raspberry Pi smart practice tablet according to claim 6, characterized in that: The multi-function button (22) includes: a gamepad directional button (2201), a mouse button (2202), a physical mini trackball (2203), a gamepad function button (2204), an exit button (2205), a start button (2206), an enter button (2207), and a tab button (2208).

9. A Raspberry Pi smart practice tablet according to claim 6, characterized in that: A battery box (27) is fixedly connected to the lower rear surface of the circuit board (7).

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