Smart projection picture automatic correction device based on mobile phone / tablet posture sensing

Abstract

The utility model discloses a smart projection picture automatic correction device based on cell -phone / tablet posture response relates to projection equipment technical field. This smart projection picture automatic correction device based on cell -phone / tablet posture response, including device shell, the device shell is the cuboid hollow structure and the front side is open state, the front side fixedly connected with the front cover of device shell, the top is equipped with the heat dissipation hole, the back fixedly connected with the light supplementing lamp, and the bottom side of device shell is provided with fixed base mechanism, and the back of device shell has projection lens. This smart projection picture automatic correction device based on cell -phone / tablet posture response, and the device shell is the cuboid hollow structure, and the front side is equipped with the front cover of dustproof, and the top heat dissipation hole radiates heat, and the back light supplementing lamp light supplementing keeps picture collection accurate. The bottom side fixed base is stable, and the back projection lens projects, and the inside mechanism adjusts the angle, and the circuit control mechanism coordinates the machine realization picture automatic correction.

Description

Technical Field

[0001] This utility model relates to the field of projection equipment technology, and in particular to an intelligent projection image automatic correction device based on mobile phone / tablet posture sensing. Background Technology

[0002] With the development of technology, portable home projectors are becoming increasingly popular among consumers due to their compact size, portability, and flexible use. Users often move projectors around in different home settings, such as from the living room to the bedroom or from indoors to outdoor camping. However, during frequent moves, the projector's orientation can change, leading to problems such as trapezoidal distortion and tilting of the projected image, which can affect the viewing experience.

[0003] Currently, projection devices on the market have many shortcomings in image calibration. Traditional manual calibration methods are cumbersome, requiring users to physically adjust the device angle or manually set parameters in complex menus. Each calibration takes a long time, making it difficult to meet users' needs for quick use. Some projectors with automatic calibration functions either have a slow response, with the calibration process taking several seconds or even longer, or insufficient calibration accuracy, making them prone to deviations in complex environments such as strong light or device vibration. Some products also have excessively high costs due to the use of high-precision cameras, TOF ranging modules, and other hardware, which hinders the widespread adoption of these products.

[0004] For portable home projectors, the limited internal space presents a significant challenge: how to integrate calibration-related hardware modules effectively while ensuring heat dissipation and structural stability. Therefore, developing an efficient, accurate, stable, and low-cost intelligent automatic projection image calibration device based on smartphone / tablet posture sensing has become a crucial topic in the current projection equipment technology field. Utility Model Content

[0005] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a solution that can solve the above-mentioned problem.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an intelligent projection screen automatic correction device based on mobile phone / tablet posture sensing, including a device shell, wherein the device shell is a hollow cuboid structure and the front side is open.

[0007] The device housing has a front cover fixedly connected to the front, heat dissipation holes on the top, and a supplementary light fixedly connected to the rear. A fixed base mechanism is provided on the bottom side of the device housing.

[0008] The device housing has a projection lens on the rear side, and a lens fine-tuning drive mechanism is installed inside the device housing. The device housing also has a circuit control mechanism inside.

[0009] Preferably, the fixed base mechanism includes a base support, the bottom of which is triangular, the top of which is rectangular, and the middle of which is cylindrical;

[0010] The top of the base bracket is fixedly connected with two fixing screws, and the bottom of the device housing has bracket mounting holes corresponding to the fixing screws.

[0011] The fixing screws are fixedly connected to the mounting holes of the bracket.

[0012] Preferably, the lens fine-tuning mechanism includes a lens mounting base, which is a ring structure and is fixedly connected inside the device housing at the position corresponding to the projection lens;

[0013] The projection lens is fixedly connected to a lens mounting base at one end inside the device housing, and the lens mounting base is rotatably connected to the lens fixing base;

[0014] A spur gear is fixedly connected to the outside of the lens mount.

[0015] Preferably, a motor mounting base is fixedly connected inside the housing of the device, and a miniature stepper motor is fixedly connected to the motor mounting base;

[0016] The output end of the micro stepper motor is fixedly connected to a bevel gear, which meshes with a spur gear.

[0017] Preferably, the circuit control mechanism includes a circuit board located inside the device housing, and four mounting columns are fixedly connected inside the device housing.

[0018] The circuit board is fixedly connected to the four corners with fixing screws, which are fixedly connected to the mounting column. The main control module, storage module and communication module are fixedly connected to the circuit board.

[0019] Preferably, an antenna is fixedly connected to the right side of the device housing, and the output end of the antenna extends into the interior of the device housing and is fixedly connected to the communication module.

[0020] Preferably, a battery is fixedly connected inside the housing of the device, and a charging port is provided on the rear side of the housing.

[0021] Preferably, a screen is fixedly connected to the front cover.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] (1) The core function of the fixed base mechanism of the intelligent projection screen automatic correction device based on mobile phone / tablet posture sensing is to provide stable support for the device and ensure that the screen correction accuracy will not be affected by shaking during the projection process. The bottom of the base bracket adopts a triangular structure, which utilizes the stability principle of triangle to greatly improve the anti-tipping ability of the device when placed, and adapts to different placement surfaces such as desktops and ground. The cylindrical design in the middle can buffer the slight external vibration to a certain extent and reduce the impact on the precision components inside the device. The rectangular structure at the top is firmly connected to the bracket mounting hole at the bottom of the device shell through two fixing screws, ensuring that the base bracket and the device shell form an integral whole, avoiding relative displacement, and laying the foundation for subsequent angle adjustment of the projection lens and stable projection of the screen.

[0024] (2) The intelligent projection screen automatic correction device based on mobile phone / tablet posture sensing has a ring-shaped lens mount that is compatible with the projection lens and is securely installed in the corresponding position inside the device housing, providing a reference for lens adjustment. The lens mounting base inside the projection lens is rotatably connected to the lens mount, allowing the projection lens to rotate around the center of the lens mount to achieve angle adjustment. The spur gear on the outside of the lens mount serves as a transmission component. When driven, it drives the lens mount to rotate, thereby changing the projection angle of the projection lens. Combined with the posture sensing signal, it can accurately adjust the projection direction of the screen to ensure that the angle between the screen and the projection surface is appropriate. The motor mount securely fixes the micro stepper motor inside the device housing to ensure stable motor operation. The micro stepper motor has high-precision control characteristics and can accurately rotate a specific angle according to the pulse signal of the circuit control mechanism, providing precise power for lens fine adjustment. The bevel gear at its output end meshes with the spur gear, transmitting the motor rotation motion to the lens mount. The meshing transmission can change the direction of force transmission, so that the motor driving force is efficiently converted into lens rotation power, realizing fine adjustment of the projection lens angle and meeting the accuracy requirements of automatic screen correction.

[0025] (3) The intelligent projection screen automatic correction device based on mobile phone / tablet posture sensing has a circuit control mechanism as its control core, which is responsible for signal processing and command transmission. The four mounting columns are fixed to the circuit board inside the device shell by fixing screws to prevent the circuit board from shaking and affecting the operation of the components. The main control module on the circuit board is the core processor, which receives the posture sensing signal from the mobile phone / tablet, analyzes the deviation of the projected screen in combination with the preset algorithm, and then sends adjustment commands to the lens fine-tuning drive mechanism. The storage module is used to store data such as correction algorithm and device parameters to ensure that the information is not lost after the device is powered off. The communication module establishes a wireless connection with the mobile phone / tablet through the right antenna, receives posture sensing data in real time, and feeds back the working status of the device to the external device to realize two-way data interaction and ensure the real-time performance and accuracy of automatic screen correction. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Figure 1 This is a front structural diagram of the intelligent projection screen automatic correction device based on mobile phone / tablet posture sensing of this utility model;

[0028] Figure 2 This is a side view of the intelligent projection screen automatic correction device based on mobile phone / tablet posture sensing according to the present invention.

[0029] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0030] Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0031] Reference numerals: 1. Device housing; 2. Front cover; 3. Heat dissipation hole; 4. Charging port; 5. Bracket mounting hole; 6. Base bracket; 7. Fill light; 8. Projection lens; 9. Lens mount; 10. Lens mounting base; 11. Spur gear; 12. Motor mount; 13. Miniature stepper motor; 14. Bevel gear; 15. Mounting column; 16. Circuit board; 17. Main control module; 18. Storage module; 19. Communication module; 20. Antenna; 21. Fixing screw; 22. Battery; 23. Screen. Detailed Implementation

[0032] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0034] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] Please see Figure 1-4 This utility model provides a technical solution: an intelligent projection screen automatic correction device based on mobile phone / tablet posture sensing, including device shell 1, which is a rectangular hollow structure with the front side open.

[0037] The front cover 2 is fixedly connected to the front side of the device housing 1, the top has a heat dissipation hole 3, the rear is fixedly connected to a supplementary light 7, and the bottom side of the device housing 1 is provided with a fixed base mechanism.

[0038] The device housing 1 has a projection lens 8 on the rear side. The projection lens 8 extends into the device housing 1 and is equipped with a lens fine-tuning drive mechanism. The device housing 1 is equipped with a circuit control mechanism.

[0039] The outer shell 1 serves as the core load-bearing structure. Its hollow cuboid design provides installation space for the internal components. The open front, combined with the front cover 2, forms a closed protection to prevent dust from entering and affecting the internal components. The top heat dissipation holes 3 can dissipate the heat generated during device operation in a timely manner, avoiding overheating that could lead to performance degradation. The rear supplementary light 7 enhances brightness when ambient light is insufficient, ensuring the accuracy of the projected image acquisition. The bottom fixed base mechanism ensures stable placement of the device. The rear projection lens 8 is responsible for image projection. Its internal lens fine-tuning drive mechanism can adjust the angle according to the attitude sensing signal. The circuit control mechanism receives, processes, and coordinates the operation of each component to achieve automatic image correction.

[0040] Furthermore, the fixed base mechanism includes a base support 6, which has a triangular bottom, a rectangular top, and a cylindrical middle.

[0041] The top of the base bracket 6 is fixedly connected with two fixing screws 21, and the bottom of the device housing 1 is provided with bracket mounting holes 5 corresponding to the fixing screws 21.

[0042] The fixing screw 21 is fixedly connected to the bracket mounting hole 5;

[0043] The core function of the fixed base mechanism is to provide stable support for the device, ensuring that the image correction accuracy is not affected by shaking during projection. The bottom of the base bracket 6 adopts a triangular structure, which utilizes the stability principle of triangles to greatly improve the anti-tipping ability of the device when placed, and adapts to different placement surfaces such as desktops and floors. The cylindrical design in the middle can buffer minor external vibrations to a certain extent, reducing the impact on the precision components inside the device. The rectangular structure at the top is firmly connected to the bracket mounting hole 5 at the bottom of the device shell 1 by two fixing screws 21, ensuring that the base bracket 6 and the device shell 1 form a whole, avoiding relative displacement, and laying the foundation for subsequent angle adjustment of the projection lens 8 and stable image projection.

[0044] Furthermore, the lens fine-tuning mechanism includes a lens mounting base 9, which is a ring structure and is fixedly connected inside the device housing 1 at the position corresponding to the projection lens 8.

[0045] The projection lens 8 is fixedly connected to a lens mounting base 10 at one end inside the device housing 1, and the lens mounting base 10 is rotatably connected to the lens fixing base 9.

[0046] A spur gear 11 is fixedly connected to the outer side of the lens mount 10;

[0047] A motor mounting base 12 is fixedly connected inside the outer casing 1 of the device, and a micro stepper motor 13 is fixedly connected to the motor mounting base 12.

[0048] The output end of the micro stepper motor 13 is fixedly connected to a bevel gear 14, which meshes with a spur gear 11.

[0049] The lens mount 9 is a ring-shaped structure that fits the projection lens 8 and is securely installed inside the housing 1 of the device, providing a reference for lens adjustment. The lens mounting base 10 on the inner side of the projection lens 8 is rotatably connected to the lens mount 9, allowing the projection lens 8 to rotate around the center of the lens mount 9 to achieve angle adjustment. The spur gear 11 on the outer side of the lens mount 10 serves as a transmission component. When driven, it drives the lens mount 10 to rotate, thereby changing the projection angle of the projection lens 8. Combined with the attitude sensing signal, the projection direction of the image can be precisely adjusted to ensure that the angle between the image and the projection surface is consistent. The motor mounting bracket 12 securely fixes the micro stepper motor 13 inside the device housing 1, ensuring stable motor operation. The micro stepper motor 13 has high-precision control characteristics and can precisely rotate a specific angle according to the pulse signal of the circuit control mechanism, providing precise power for lens fine adjustment. The bevel gear 14 at its output end meshes with the spur gear 11, transmitting the motor rotation motion to the lens mounting bracket 10. The meshing transmission can change the direction of force transmission, so that the motor driving force is efficiently converted into lens rotation power, realizing fine adjustment of the projection lens 8 angle and meeting the accuracy requirements of automatic image correction.

[0050] Furthermore, the circuit control mechanism includes a circuit board 16, which is located inside the device housing 1. Four mounting posts 15 are fixedly connected inside the device housing 1.

[0051] The four corners of the circuit board 16 are fixedly connected with fixing screws 21, which are fixedly connected to the mounting column 15. The main control module 17, the storage module 18 and the communication module 19 are fixedly connected to the circuit board 16.

[0052] An antenna 20 is fixedly connected to the right side of the device housing 1. The output end of the antenna 20 extends into the interior of the device housing 1 and is fixedly connected to the communication module 19.

[0053] The circuit control mechanism is the core of the device, responsible for signal processing and command transmission. Four mounting columns 15 securely fix the circuit board 16 inside the device housing 1 with fixing screws 21 to prevent the circuit board 16 from shaking and affecting the operation of the components. The main control module 17 on the circuit board 16 acts as the core processor, receiving the attitude sensing signals from the mobile phone / tablet, analyzing the deviation of the projected image with a preset algorithm, and then sending adjustment commands to the lens fine-tuning drive mechanism. The storage module 18 is used to store data such as correction algorithms and device parameters to ensure that information is not lost after the device is powered off. The communication module 19 establishes a wireless connection with the mobile phone / tablet through the right antenna 20, receives attitude sensing data in real time, and feeds back the device's working status to external devices to achieve two-way data interaction and ensure the real-time performance and accuracy of automatic image correction.

[0054] Furthermore, a battery 22 is fixedly connected inside the device housing 1, and a charging port 4 is provided on the rear side of the device housing 1.

[0055] The battery 22 and the charging port 4 together provide power support for the device to ensure its continuous operation. When the battery 22 is low on power, it can be charged by connecting an external power source through the rear charging port 4.

[0056] Furthermore, a screen 23 is fixedly connected to the front cover 2;

[0057] The screen 23 on the front cover 2 is mainly used for information display and interaction, enhancing the interactivity and ease of use of the device.

[0058] Working principle: The core function of the fixed base mechanism is to provide stable support for the device, ensuring that the image correction accuracy will not be affected by shaking during projection. The bottom of the base bracket 6 adopts a triangular structure, which utilizes the stability principle of triangles to greatly improve the anti-tipping ability of the device when placed, and adapts to different placement surfaces such as desktops and floors. The cylindrical design in the middle can buffer minor external vibrations to a certain extent, reducing the impact on the precision components inside the device. The rectangular structure at the top is firmly connected to the bracket mounting hole 5 at the bottom of the device shell 1 by two fixing screws 21, ensuring that the base bracket 6 and the device shell 1 form a whole, avoiding relative displacement, and laying the foundation for subsequent angle adjustment of the projection lens 8 and stable image projection.

[0059] The lens mount 9 is a ring-shaped structure that fits the projection lens 8 and is securely installed inside the housing 1 of the device, providing a reference for lens adjustment. The lens mounting base 10 on the inner side of the projection lens 8 is rotatably connected to the lens mount 9, allowing the projection lens 8 to rotate around the center of the lens mount 9 to achieve angle adjustment. The spur gear 11 on the outer side of the lens mount 10 serves as a transmission component. When driven, it drives the lens mount 10 to rotate, thereby changing the projection angle of the projection lens 8. Combined with the attitude sensing signal, the projection direction of the image can be precisely adjusted to ensure that the angle between the image and the projection surface is consistent. The motor mounting bracket 12 securely fixes the micro stepper motor 13 inside the device housing 1, ensuring stable motor operation. The micro stepper motor 13 has high-precision control characteristics and can precisely rotate a specific angle according to the pulse signal of the circuit control mechanism, providing precise power for lens fine adjustment. The bevel gear 14 at its output end meshes with the spur gear 11, transmitting the motor's rotational motion to the lens mounting bracket 10. The meshing transmission can change the direction of force transmission, so that the motor driving force is efficiently converted into lens rotation power, realizing fine adjustment of the projection lens 8 angle and meeting the accuracy requirements of automatic image correction.

[0060] The circuit control mechanism is the core of the device, responsible for signal processing and command transmission. Four mounting columns 15 securely fix the circuit board 16 inside the device housing 1 with fixing screws 21 to prevent the circuit board 16 from shaking and affecting the operation of the components. The main control module 17 on the circuit board 16 acts as the core processor, receiving the attitude sensing signals from the mobile phone / tablet, analyzing the deviation of the projected image with a preset algorithm, and then sending adjustment commands to the lens fine-tuning drive mechanism. The storage module 18 is used to store data such as correction algorithms and device parameters to ensure that information is not lost after the device is powered off. The communication module 19 establishes a wireless connection with the mobile phone / tablet through the right antenna 20, receives attitude sensing data in real time, and feeds back the device's working status to external devices to achieve two-way data interaction and ensure the real-time performance and accuracy of automatic image correction.

[0061] Structural Description:

[0062] Device housing 1: A rectangular hollow ABS structure with a model number of W200×D150×H80mm, open at the front, with a wall thickness of 2mm, making it lightweight and sturdy; providing a neat installation space for the internal components, and forming a tight seal with the front cover 2 to effectively prevent dust and moisture from entering; the top heat dissipation hole 3 is designed to accelerate air convection, dissipate operating heat in time, prevent components from aging due to high temperature, and ensure long-term stable operation of the device;

[0063] Front cover 2: Made of the same ABS material, it is fixed to the outer shell 1 by clips and 4 screws. The size is precisely matched to the open front part, and the rounded corners are treated to prevent bumps. Together with the outer shell, it forms a closed space to protect the internal components in all directions. At the same time, it provides a flat and stable mounting base for the screen 23, ensuring that the screen does not loosen when the device is moved and can stably perform display and interaction functions.

[0064] Heat dissipation hole 3: Six sets of elongated holes at the top and rear end of the outer casing 1, each set is 100×10mm, with a hole spacing of 5mm, and a fine dustproof mesh inside; the ample opening area ensures efficient ventilation and heat dissipation, the dustproof mesh effectively intercepts dust particles in the air, maintains a suitable internal temperature, extends the service life of each component, and ensures stable and uninterrupted projection.

[0065] Charging port 4: A standard USB-C port on the lower rear side of the casing 1. The port is surrounded by a rubber dust plug, which can be tightly closed when not in use. It is designed for charging battery 22. During charging, the indicator light next to the port displays the power status in real time. It is compatible with most chargers and also supports reverse charging to ensure that the device can continue to work in scenarios without a fixed power source.

[0066] Bracket mounting holes 5: Near the four corners of the bottom of the outer shell 1, there are four threaded holes corresponding to the screws at the top of the base bracket 6. The hole diameter matches the screw and the depth is 10mm. These provide a firm support for the connection between the base bracket and the outer shell. After the screws are screwed in, sufficient pre-tightening force is generated to lock the two into a whole, effectively preventing displacement and loosening, and ensuring the stability of the device.

[0067] Base bracket 6: Made of high-strength engineering plastic through one-piece injection molding, with an equilateral triangle at the bottom with a side length of 80mm, anti-slip rubber pads at the three corners, a rectangular 50×30mm top with screw holes, and a cylindrical connecting rod in the middle with a diameter of 20mm; the triangular structure, through geometric stability, greatly improves the device's resistance to tipping on different planes; the cylindrical connecting rod can deform slightly to buffer vibration; the connection between the top and the outer shell ensures overall rigidity, laying a solid foundation for the angle adjustment of the projection lens 8 and image projection;

[0068] The fill light 7 is a 5W high-brightness LED lamp bead installed next to the projection lens 8. It is equipped with a small reflector to enhance light focusing, and the angle can be adjusted ±15° via a fine-tuning bracket. In dim ambient light, it emits soft light to illuminate the projection area, improves image contrast and clarity, and ensures that the correction algorithm can accurately identify image features and optimize the projection effect.

[0069] Projection Lens 8: It adopts a 6-layer coated optical glass lens group, with an adjustable focal length of 10-20mm. The metal shell is treated with anti-oxidation to effectively reduce light reflection loss. As the core projection component, it is closely connected with the lens fine adjustment mechanism and can flexibly adjust the angle according to the posture sensing signal to ensure that the projected image is always square and clear, presenting a high-quality image.

[0070] Lens mount 9: A ring structure machined from metal, with an inner diameter that precisely matches the outer diameter of the lens 8. It is fixed to the corresponding position inside the outer shell 1 by three screws, and a wear-resistant bearing is embedded on the inner side. It provides stable rotation support for the lens mount 10. The bearing design greatly reduces friction and noise during rotation, making the angle adjustment of the lens 8 smoother and more precise.

[0071] Lens mount 10: Made of high-strength plastic and metal inserts, one end is fixedly connected to the lens 8, and the other end is engaged with the bearing of the lens mount 9 to achieve rotation. The connection part is sealed to prevent dust. It can drive the lens 8 to rotate around the center of the mount 9 to achieve horizontal and pitch angle adjustment, providing a reliable mechanical basis for fine image adjustment.

[0072] Spur gear 11: Made of high-strength alloy material, with a module of 0.5 and 40 teeth. The tooth surface is high-frequency quenched to enhance wear resistance. It is fixed on the outside of the lens mount 10. It meshes precisely with bevel gear 14 to transmit power to the lens mount 10, thereby driving the lens 8 to achieve precise angle adjustment and ensuring that the angle between the image and the projection surface is appropriate.

[0073] Motor mounting bracket 12: Made of cast iron, it is fixed inside the housing 1 by 4 screws, with a positioning groove that matches the micro stepper motor 13, and the surface is rust-proofed; it can firmly fix the motor, ensure that the motor output shaft is coaxial with the gear transmission system, absorb the vibration of the motor operation, ensure accurate and stable power output, and provide a reliable power source for lens fine adjustment;

[0074] Miniature stepper motor 13: Model 28BYJ-48, connected to the main control module 17 via a driver chip, with a step angle of 5.625° / 64 and a reduction ratio of 1:64; it can precisely rotate a specific angle according to the pulse signal sent by the main control module, with stable output torque, providing precise power for lens fine adjustment and ensuring that the angle adjustment error is controlled within a very small range;

[0075] Bevel gear 14: Made of the same material as spur gear 11, with a module of 0.5 and 10 teeth. The tooth surface is precision ground and fixed at the motor output end. It meshes perpendicularly with gear 11, transmits the motor's rotational motion and changes the direction of force, saves internal space, and efficiently converts the motor power into the lens rotation power to meet the requirements of image correction accuracy.

[0076] Mounting column 15: 4 metal cylinders, 30mm high and 8mm in diameter, with threaded holes at the top, are welded to the four corners inside the outer casing 1; support and fix the circuit board 16, so that the circuit board and the outer casing maintain a 10mm gap, which is conducive to heat dissipation and vibration buffering, prevents the components on the circuit board from loosening due to vibration, and ensures the stable operation of the circuit system.

[0077] Circuit board 16: FR-4 epoxy glass cloth substrate, 1.6mm thick, 120×80mm in size, fixed to the mounting column 15 with screws at the four corners, with a reasonable surface circuit layout; it carries all circuit modules such as main control, storage, and communication, realizes the electrical connection of each module, and the strong and weak current separation design reduces interference. It is the core hardware carrier of the device's intelligent control.

[0078] Main control module 17: STM32F103 chip, located in the center of the circuit board, surrounded by capacitors, resistors and other components to form a minimum system, with fast operation speed; it receives attitude sensing signals in real time, analyzes the image deviation by combining the stored correction algorithm, and quickly sends adjustment instructions to the actuator to coordinate the orderly operation of each component and ensure real-time and efficient correction.

[0079] Storage module 18: 16GB NAND flash memory chip, connected to the main control module via SPI interface, with fast read and write speeds and non-volatile storage; stores operating system, correction algorithm, device parameters and other data, information is not lost after power failure, supports algorithm upgrades, and improves device scalability and lifespan;

[0080] Communication module 19: A composite module integrating Bluetooth 5.0 and Wi-Fi 6, soldered to the edge of the circuit board, with signal isolation circuit; it establishes a stable wireless connection with mobile phone / tablet through antenna 20, transmits attitude data in real time, and provides feedback on the device's working status to ensure the real-time performance and accuracy of image correction.

[0081] Antenna 20: A 150mm long, high-gain omnidirectional antenna, fixed to the right side of housing 1 via an SMA interface, capable of 360° rotation, with the output connected to a communication module; enhancing signal transmission and reception capabilities, expanding communication coverage, ensuring stable connection even with obstructions, and providing reliable data transmission assurance.

[0082] Fixing screw 21: M3×8mm stainless steel, galvanized for rust prevention, with cross-slot countersunk head design; used to fix components such as base brackets, circuit boards, and motor mounting brackets, generating sufficient clamping force to prevent component displacement and ensure the rigidity and stability of the overall structure of the device;

[0083] Battery 22: 5000mAh lithium polymer battery, 8mm thick, fixed inside the lower part of the shell by a bracket, with overcharge and over-discharge protection circuit; provides independent power support, can maintain 4-6 hours of operation on a full charge, and is compatible with charging port 4 to achieve cyclic charging and discharging, ensuring continuous power supply to the device and safe use.

[0084] The screen is a 23.5-inch high-definition TFT touchscreen with a resolution of 1280×720. It is connected to the circuit board driver chip via a ribbon cable and is covered with scratch-resistant tempered glass. It clearly displays the device status and parameters, supports multi-touch operation, and allows users to intuitively set and calibrate, reducing the barrier to entry and improving the user experience.

[0085] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A smart projection picture automatic correction device based on mobile phone / tablet posture sensing, comprising a device shell (1), characterized in that: The outer shell (1) of the device is a hollow cuboid structure with the front side open; The front cover (2) is fixedly connected to the front side of the device housing (1), the top is provided with heat dissipation holes (3), the rear is fixedly connected with a supplementary light (7), and the bottom side of the device housing (1) is provided with a fixed base mechanism. The device housing (1) has a projection lens (8) on the rear side. The projection lens (8) extends into the device housing (1) and is equipped with a lens fine-tuning drive mechanism. The device housing (1) is equipped with a circuit control mechanism. 2.The smart projection picture automatic correction device based on mobile phone / tablet posture sensing according to claim 1, characterized in that: The fixed base mechanism includes a base support (6), the bottom of which is triangular, the top is rectangular, and the middle is cylindrical; The top of the base bracket (6) is fixedly connected with two fixing screws (21), and the bottom of the device housing (1) is provided with bracket mounting holes (5) corresponding to the fixing screws (21); The fixing screw (21) is fixedly connected to the bracket mounting hole (5). 3.The smart projection picture automatic correction device based on mobile phone / tablet posture sensing of claim 2, characterized in that: The lens fine-tuning mechanism includes a lens mounting base (9), which is a ring structure and is fixedly connected inside the device housing (1) at the position corresponding to the projection lens (8); The projection lens (8) is fixedly connected to a lens mounting base (10) at one end inside the device housing (1), and the lens mounting base (10) is rotatably connected to the lens fixing base (9); A spur gear (11) is fixedly connected to the outside of the lens mount (10). 4.The smart projection picture automatic correction device based on mobile phone / tablet posture sensing according to claim 3, characterized in that: The device housing (1) is fixedly connected to a motor mounting base (12), and a micro stepper motor (13) is fixedly connected to the motor mounting base (12); The output end of the micro stepper motor (13) is fixedly connected to a bevel gear (14), which meshes with a spur gear (11). 5.The smart projection picture automatic correction device based on mobile phone / tablet posture sensing according to claim 4, characterized in that: The circuit control mechanism includes a circuit board (16), which is located inside the device housing (1). Four mounting columns (15) are fixedly connected inside the device housing (1). The four corners of the circuit board (16) are fixedly connected with fixing screws (21), which are fixedly connected to the mounting column (15). The main control module (17), storage module (18) and communication module (19) are fixedly connected to the circuit board (16). 6.The smart projection picture automatic correction device based on mobile phone / tablet posture sensing according to claim 5, characterized in that: An antenna (20) is fixedly connected to the right side of the device housing (1). The output end of the antenna (20) extends into the interior of the device housing (1) and is fixedly connected to the communication module (19). 7.The smart projection picture automatic correction device based on mobile phone / tablet posture sensing according to claim 6, characterized in that: A battery (22) is fixedly connected inside the outer casing (1) of the device, and a charging hole (4) is provided on the rear side of the outer casing (1). 8.The smart projection picture automatic correction device based on mobile phone / tablet posture sensing according to claim 7, characterized in that: A screen (23) is fixedly connected to the front cover (2).

Images