Display screen turnover mechanism and control method

Abstract

The invention relates to the technical field of display screens, in particular to a display screen turnover mechanism and a control method. The movable opening of the mounting box is rotationally connected with the supporting frame; the top of the supporting frame is fixedly connected with the display screen; the fixing block is fixedly connected in the mounting box; the guide frame is fixedly connected in the mounting box; the moving seat is connected to the guide frame in a sliding manner; the screw rod is rotationally connected into the mounting box; the first servo motor is fixedly connected to the fixed block; and the connecting rod is rotationally connected between the end part of the support frame and the movable seat. According to the invention, man-machine interaction can be realized, the visual angle of the device can be controlled and changed by using a non-contact adjustment means, on one hand, the non-contact operation can be conveniently and frequently carried out, and on the other hand, the contact damage risk of traditional adjustment can be avoided, so that the convenience and safety of the device are improved.

Description

Technical Field

[0001] This invention relates to the field of display screen technology, and more particularly to a display screen flipping mechanism and control method. Background Technology

[0002] As the core carrier of human-computer interaction, the angle between the display screen and the user's line of sight directly affects the user's operating experience and visual health. In daily use, users often frequently adjust their sitting posture (leaning forward or backward), causing the screen angle to deviate from the optimal viewing range, leading to visual fatigue or cervical spine pressure. In addition, in public places such as school computer labs, internet cafes, and training classrooms, the display screen is usually used by users of different heights and sitting postures in rotation, thus requiring frequent adjustments to the screen's tilt angle, height, or horizontal orientation. Therefore, the adjustable function of the display screen will become a key breakthrough in improving ergonomics. While current mainstream display adjustment schemes can achieve basic angle adjustments, they still have the following drawbacks: First, they rely on manual mechanical operation, requiring users to stand up, get close to the screen, and apply force through physical pushing, pulling, or knobs, resulting in low operational efficiency. Second, due to insufficient gear meshing precision or aging of damping friction plates, the display is prone to non-linear jerking and angle rebound during adjustment, requiring users to repeatedly apply force to calibrate and eliminate offset errors, severely affecting the smoothness of operation. Third, long-term gravity loads cause structural wear on the joint surfaces of the hinge, leading to screen tilt lock failure and a "self-sinking" phenomenon, resulting in weak mechanical durability. Summary of the Invention

[0003] In view of the deficiencies of the prior art mentioned in the background section, this application proposes a display screen flipping mechanism and control method that can conveniently adjust the reverse viewing angle.

[0004] In a first aspect, the technical implementation of the present invention is as follows: a display screen flipping mechanism, comprising: a mounting box, wherein an opening is provided in the upper part of the mounting box; A support frame is rotatably connected to the movable opening of the mounting box; The display screen is fixedly connected to the top of the support frame; A fixing block is fixedly connected inside the mounting box; Guide frame, a guide frame is fixedly connected inside the mounting box; A movable seat is slidably connected to the guide frame; A screw is rotatably connected inside the mounting box, and the screw is threadedly connected to the movable seat; A first servo motor is fixedly connected to the fixed block, and the output end of the first servo motor is fixedly connected to the screw. A connecting rod is rotatably connected between the end of the support frame and the movable seat; The controller is connected to the first servo motor via a signal, and the controller is used to control the swing angle of the display screen according to human needs.

[0005] More preferably, the support frame has a long and short lever arm structure, with the short lever arm and the pivot shaft of the support frame disposed inside the mounting box, and the long lever arm of the support frame passing through the movable opening and disposed outside the mounting box.

[0006] More preferably, the mechanism further includes a main baffle, which is fixedly connected to the support frame. The main baffle is located at the movable opening of the mounting box and completely seals the movable opening in the initial state.

[0007] More preferably, the mechanism further includes a guide rod, which is fixedly connected inside the mounting box; A sub-baffle is slidably connected to the guide rod, and the sub-baffle is slidably connected to the main baffle; A reset spring is sleeved on the guide rod and fixed between the mounting box and the sub-baffle.

[0008] More preferably, More preferably, the mechanism further includes a slide rail, and the slide rail is fixedly connected inside the mounting box; Rollers are rotatably connected to both the sub-baffle and the main baffle. The main baffle has wheel grooves on both sides inside. The sub-baffle slides with the main baffle through the cooperation of the rollers and wheel grooves. When the rollers on the sub-baffle move to the end of the wheel groove, the main baffle can drive the sub-baffle to move. The main baffle makes rolling contact with the slide rail through the rollers on it.

[0009] More preferably, the mechanism further includes: a base; A rotating plate is rotatably connected to the base, and the mounting box is fixedly connected to the rotating plate. A second servo motor is fixedly connected inside the base, and the output end of the second servo motor is fixed to the rotating plate.

[0010] More preferably, the mechanism further includes a light shield, which is rotatably connected to the display screen.

[0011] More preferably, the mechanism further includes: a third servo motor, which is fixedly connected to the display screen, and the output end of the third servo motor is fixed to the light shield; A display screen image acquisition device is fixedly connected to the top front of the display screen, and the display screen image acquisition device is electrically connected to the third servo motor.

[0012] Secondly, the technical implementation scheme of the present invention is: a control method for a display screen flipping mechanism, applied to the above-mentioned display screen flipping mechanism, the control method comprising: When the display screen is turned on and a user is detected sitting in front of the display screen, the user's offset angle is identified. The offset angle is the angle between the perpendicular line from the midpoint of the user's eye to the center line of the display screen and the symmetrical section of the display screen. The symmetrical section is the plane that is perpendicular to the display screen and contains the center line of the display screen. Based on the offset angle, if it is determined that the offset angle exceeds the first preset offset angle range, then the second servo motor is controlled to drive the rotating plate to rotate the base until the offset angle is within the first preset offset angle range. The angle between the user's horizontal line of sight and the current line of sight of the display screen is obtained. Based on the angle of sight, if it is determined that the angle of sight exceeds the second preset offset angle range, the first servo motor is controlled to drive the support frame to swing, so as to adjust the swing angle of the display screen in the pitch direction until the angle of sight is within the second preset offset angle range. The angle of sight is the angle between the horizontal line of sight from the midpoint of the user's eye to the center line of the display screen and the center line of the display screen.

[0013] More preferably, the control method further includes: Acquire an image of the screen surface of the display screen and convert the screen surface image into a grayscale image; Based on the comparison between the grayscale value of each pixel in the grayscale image and the preset brightness threshold, the reflective areas on the screen surface are obtained. The reflectivity of the display screen is obtained based on the proportion of all the reflective areas on the screen surface, and the position of the light shield is adjusted by the third servo motor according to the reflectivity and the position of the reflective areas.

[0014] The beneficial effects of this invention are as follows: This invention enables human-computer interaction, allowing for non-contact adjustment to control and change the viewing angle. This non-contact operation allows for convenient and frequent operation while avoiding the contact damage risks associated with traditional adjustments, thus improving the convenience and safety of this invention. This invention uses a support frame with a high arm-to-arm ratio for display angle adjustment, balancing precise positioning with a wide range of adjustments, reducing wear on moving parts, and extending the service life of this invention. This invention achieves a fully enclosed protective structural design. Through the elastic compensation mechanism of the main baffle and sub-baffle, the moving opening is sealed in real-time without gaps, preventing dust contamination of the internal components and reducing the additional resistance of the main baffle to the rotational movement of the support frame. Combined with the low-friction structure of the roller-slide rail, this improves the smoothness of operation. This invention uses an automatic light-shielding plate adjustment function to optimize the display effect, comprehensively improving ease of use and environmental adaptability. Attached Figure Description

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a cross-sectional view of the connection structure of the support frame inside the mounting box in this invention.

[0017] Figure 3 This is a schematic diagram of the connection structure after the support frame is rotated in this invention.

[0018] Figure 4 This is a cross-sectional view of the connection structure between the main baffle and the sub-baffle in the mounting box in this invention.

[0019] Figure 5 This is a schematic diagram of the connection structure of the main baffle and the sub-baffle from the lower viewpoint in this invention.

[0020] Figure 6 This is a cross-sectional view of the position structure of the mounting box and the second servo motor in this invention.

[0021] Figure 7 This is a schematic diagram of the position and structure of the light-shielding plate in this invention.

[0022] Figure 8 This is a schematic diagram of the structure of the light-shielding plate after it is unfolded in this invention.

[0023] Figure 9 This is a schematic diagram of the main baffle in this invention.

[0024] Figure 10 This is a schematic diagram of the sub-baffle structure in this invention.

[0025] Figure 11 This is a flowchart illustrating the control method of the present invention.

[0026] Figure 12 This is a schematic diagram illustrating the calibration principle of the offset angle in this invention.

[0027] Figure 13 This is a schematic diagram illustrating the calibration principle of the line-of-sight angle in this invention.

[0028] In the attached diagrams: 1: Mounting box, 2: Support frame, 3: Display screen, 4: Fixing block, 5: Guide frame, 51: Guide rod, 6: Moving seat, 7: Screw, 8: First servo motor, 9: Connecting rod, 10: Main baffle, 101: First protrusion, 102: Second protrusion, 103: Wheel groove, 11: Guide rod, 12: Sub-baffle, 13: Return spring, 14: Slide rail, 15: Roller, 16: Base, 17: Rotating plate, 18: Second servo motor, 19: Light shield, 20: Third servo motor, 21: Display screen image acquisition device. Detailed Implementation

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: Display screen flipping mechanism, combined with Figures 1-3 As shown, it includes: Mounting box 1, with an opening at the top; Support frame 2 is rotatably mounted on mounting box 1. The separation of the pivot of support frame 2 results in a significant long and short lever arm structure. Through the lever principle, it achieves efficient conversion between small displacement input and large angle output. The pivot of support frame 2 and the short lever arm of its lower section are set inside mounting box 1. The long lever arm of the upper section of support frame 2 extends out from the movable opening of mounting box 1 and is set outside mounting box 1. The movable opening is set to support the free rotation of support frame 2 on mounting box 1. Display screen 3 is fixedly installed on the top of the long lever arm of support frame 2; Fixing block 4 is fixedly installed inside the mounting box 1, and the fixing block 4 is matched with the movable port. Guide frame 5 is fixedly installed inside the mounting box 1; The movable seat 6 is slidably mounted on the guide frame 5, and the displacement direction of the movable seat 6 is the front-to-back direction; Screw 7 is rotatably installed inside mounting box 1. Screw 7 is threadedly installed with movable seat 6. The forward and reverse rotation of screw 7 controls the forward and backward displacement of movable seat 6. The first servo motor 8 is fixedly mounted on the fixing block 4. The output end of the first servo motor 8 is fixedly mounted to the screw 7 using a coupling. The first servo motor 8 provides continuous operating power for the rotation of the screw 7. The mechanism is equipped with a controller. The first servo motor 8 is connected to the controller via a signal. The remote control device and the controller establish a stable electrical signal connection to realize remote control of the first servo motor 8. The remote control device is equipped with a screen display to display parameters such as the current angle, working mode, and status of each servo motor in the mechanism in real time, so as to realize intuitive operation. A connecting rod 9 is rotatably mounted between the lower end of the support frame 2 and the movable seat 6. The movable seat 6 will input displacement to the support frame 2 through the connecting rod 9. In this embodiment of the application, there are at least two connecting rods 9, which are respectively located on both sides of the movable seat 6 and connected to the support frame 2 on different sides, thereby driving the support frame 2 to swing stably.

[0031] It should be noted that, see Figure 3 In this embodiment, the support frame 2 includes branch supports connected together by a crossbar. The two branch supports are connected to the movable seat 6 by two connecting rods 9 respectively. The guide frame 5 is located below the crossbar, and the top of the guide frame 5 is arc-shaped. In the position design, the crossbar uses the guide frame 5, which is set below and has a matching rotation arc at the top, as the support point for subsequent circumferential rotation, making it more stable when the short lever arm drives the display screen 3 to swing. At the same time, based on the structural setting of the guide frame 5, guide posts 51 extending along the first direction (see the arrow X in the figure) are set on both sides of its middle part, and a screw 7 with the same extension direction is inserted between the two guide posts 51. Therefore, the guide frame 5 also essentially plays the role of limiting the stroke of the movable seat 6.

[0032] In this embodiment, the first servo motor 8 is activated. The first servo motor 8 drives the moving seat 6 to perform linear displacement in the front-to-back direction along the guide frame 5. Then, through the transmission function of the connecting rod 9, this linear displacement is converted into an angular displacement input with a short lever arm. Based on the lever amplification principle, this embodiment uses a 250mm long lever arm and a 50mm short lever arm to form a 5:1 lever arm ratio. This allows the moving seat 6 to generate only a precise linear displacement of 5mm to drive the support frame 2 and the display screen 3 to achieve an angle adjustment of more than 20°. This not only improves the mechanical gain efficiency but also effectively reduces the relative movement speed between the contact surfaces, thereby reducing the wear rate of the support frame 2.

[0033] In terms of control, this device integrates a control system between the remote control device and the first servo motor 8. The user sends commands to the controller via the remote control device, causing the controller to start the first servo motor 8 and drive the moving base 6 to move smoothly at a constant speed. This ensures that the rotation of the display screen 3 remains smooth and uniform, avoiding screen flickering. This non-contact control method not only avoids the risk of scratches or structural damage to the display screen 3 that may occur with traditional adjustment methods, but also ensures the smoothness and repeatability of the angle adjustment process, improving operational convenience and safety.

[0034] To meet the needs of different application scenarios, this device also provides three intelligent adjustment modes, which users can choose according to their needs: ① Precision mode - controls the support frame 2 to achieve 0.5° step adjustment, meeting the needs of precise control, with an accuracy of ±0.1°; ② Fast mode - supports the support frame 2 to achieve continuous smooth adjustment of 5° / s, so as to quickly adjust large angles; ③ Preset mode - stores and automatically recalls 3 sets of commonly used working angles.

[0035] Combination Figures 4-5 As shown, this organization also includes: The main baffle 10 is fixedly installed on the support frame 2. The main baffle 10 is located at the movable opening of the mounting box 1 and completely seals the movable opening in the initial state. Here, the initial state is defined as follows: Figure 2 The state shown is such that the connecting rod 9 is nearly perpendicular to the support frame 2, and the support frame 2 is in the middle of the movable opening.

[0036] Guide rod 11: A guide rod 11 is fixedly installed inside the mounting box 1. The guide rod 11 is arc-shaped and corresponds to the movement trajectory of the main baffle 10. There are at least two guide rods 11, which are respectively located on both sides of the main baffle 10. Sub-baffles 12 and guide rods 11 are slidably installed on the front and rear sides. The two sub-baffles 12 are slidably installed on the front and rear ends of the main baffle 10 respectively (the front and rear ends are the front and rear ends of the display screen 3 in the swing direction). The return spring 13 is mounted on the guide rod 11. The two ends of the return spring 13 are fixedly installed on the mounting box 1 and the side of the sub-baffle 12, respectively. The return spring 13 has the function of fixing the sub-baffle 12 and assisting the sub-baffle 12 to quickly return to its original position. The slide rail 14 is fixedly installed inside the mounting box 1. The slide rail 14 is designed as an arc shape, corresponding to the movement trajectory of the main baffle 10, and both slide rails 14 are located on the outside of the two guide rods 11 away from the other guide rod 11. Rollers 15 are rotatably connected to the rollers 15, the sub-baffle 12, and the main baffle 10. The main baffle 10 has wheel grooves on both sides inside. The sub-baffle 12 slides with the main baffle 10 through the cooperation of the rollers 15 and the wheel grooves. When the rollers 15 on the sub-baffle 12 move to the end of the wheel groove, the main baffle 10 can drive the sub-baffle 12 to move. The main baffle 10 rolls in contact with the slide rail 14 through the rollers 15 on it.

[0037] The main baffle 10 has a structure in which the support frame 2 passes through the main baffle 10 and enters the mounting box 1. The outer surface of the main baffle 10 is smooth. The inner surface of the main baffle 10 has a first protrusion 101 in the middle and a second protrusion 102 on both sides that follow the trend of the main baffle 10. The inner ends of the second protrusion 102 are respectively provided with wheel grooves 103 for cooperating with the rollers 15 on different sub-baffles 12. The outer side of the second protrusion 102 is provided with multiple rollers 15 that cooperate with the slide rail 14 at intervals. The sub-baffle 12 has a certain outward extension arc at the end that cooperates with the main baffle 10, and a roller 15 is provided at the end of the extension arc. This design makes the cooperation between the main baffle 10 and the sub-baffle 12 more convenient.

[0038] The width of the first protrusion 101 is slightly narrower than the overall structure of the main baffle 10. The gaps on both sides of the lower surface of the main baffle 10, separated by the first protrusion 101, provide space for the two sub-baffles 12 to extend into the main baffle 10. This allows the front and rear ends of the two sub-baffles 12 to overlap with the main baffle 10. To ensure stable movement of the sub-baffles 12 by the main baffle 10, the sub-baffles 12 are preferably smaller than the main baffle 10. For example, their length can be the same as or smaller than the first protrusion 101. After the sub-baffle 12 extends into the gap, the roller 15 at its end can engage with the wheel groove 103 inside the second protrusion 102. The structural gap between the main baffle 10 and the sub-baffle 12 can be shielded by the mounting box 1. The opening diameter of the movable opening is smaller than the structural gap between the baffle 12 and the sub-baffle 12. See [reference needed] for details. Figure 4 The diagram shows the structure.

[0039] To further optimize motion performance, this mechanism adds a roller 15 and a slide rail 14 to improve the smoothness of movement of the main baffle 10 and the sub-baffle 12. Furthermore, wheel grooves 103 are symmetrically arranged on both the left and right sides inside the main baffle 10 (the sidewall of the wheel groove 103 near the roller 15 is an arc shape that matches the shape of the roller 15). In the initial state, the roller 15, located at one end of the overlapping area between the sub-baffle 12 and the main baffle 10, extends into the wheel groove 103 and is located at one end of the wheel groove 103 near the first protrusion 101. This portion of the roller 15 can slide along the wheel groove 103, and when the roller 15 moves to contact the wheel groove wall, it pushes the corresponding sub-baffle 12 to move.

[0040] It should be noted that the roller 15 is made of high-polymer composite material and cooperates with the hardened slide rail 14 to effectively reduce the coefficient of friction between them. On the one hand, this greatly reduces the resistance of the main baffle 10 when it moves, ensuring that the main baffle 10 will not generate additional torque on the rotation of the support frame 2 when it moves, thus solving the negative feedback interference caused by the rotation of the support frame 2 by the main baffle 10. On the other hand, it avoids the sub-baffle 12 from shifting along with the main baffle 10 due to friction when it moves, thus solving the problem of missed gaps. In addition, when the support frame 2 is in the vertical initial position, the main baffle 10 will completely cover the movable opening of the mounting box 1. At the same time, the two sub-baffles 12 and the front and rear ends of the main baffle 10 will overlap, and the return spring 13 will remain in its natural state. This mechanism will use the above-mentioned dynamic closing structure to keep the movable opening of the mounting box 1 continuously closed.

[0041] The movement of the sub-baffle 12, main baffle 10, and roller 15 is described below: During the rotation of support frame 2, taking the forward rotation of the long lever arm of support frame 2 as an example, the main baffle 10... The roller 15, which is slidably connected to the slide rail 14, slides stably. Simultaneously, when the main baffle 10 moves, the wheel groove 103 in its second protrusion 102 contacts the roller 15 on the front terminal baffle 12, pushing the front terminal baffle 12 to slide along the guide rod 11 and compressing the reset spring 13 connected to it. Since the main baffle 10 moves forward, the roller 15 located in the wheel groove on the rear sub-baffle 12 will also slide in the corresponding wheel groove 103. Before contacting the end of the wheel groove 103, the rear sub-baffle 12 will remain in its original position until the roller 15 of the rear terminal baffle 12 contacts the corresponding wheel groove. When the side of the main baffle 10 away from the first protrusion 101 comes into contact with the main baffle 10, it will be driven to move. Therefore, the sub-baffle 12 at the rear position can dynamically fill the gap caused by the displacement of the main baffle 10. During this process, the sub-baffle 12 at the rear position and the main baffle 10 will have relative displacement, but they will still have an overlapping area. Under the constraint of the return spring 13, there will be no excessive movement, thus ensuring that no gaps are missed. Conversely, when the long lever arm of the support frame 2 rotates backward, the sub-baffle 12 at the front position returns to its original position under the action of the return spring 13, and closes the new gap caused by it when the main baffle 10 continues to move backward. This will not be described in detail here. Therefore, this linkage structure can achieve real-time dynamic sealing of the movable opening, which can effectively prevent dust and other impurities from entering the interior of the mounting box 1, avoid affecting the normal operation of the first servo motor 8 and the screw 7, maintain the overall appearance of the mechanism, and avoid the main baffle 10 being too long and restricting the rotation range of the support frame 2.

[0042] Combination Figures 6-7 As shown, the mechanism also includes: a base 16, the bottom of which is provided with a silicone rubber anti-slip block to improve the anti-slip performance of the mechanism on various table surfaces by increasing friction; Rotating plate 17 is rotatably mounted on base 16. Rotating plate 17 is connected to base 16 through precision cross roller bearings to ensure smooth rotation without shaking. Mounting box 1 is fixedly mounted on rotating plate 17. The second servo motor 18 is fixedly installed inside the base 16. The output end of the second servo motor 18 is fixedly installed with the rotating plate 17 using a coupling. The second servo motor 18 is electrically connected to the controller to realize remote control of the second servo motor 18 through a remote control device.

[0043] Using a remote control device to send commands, the controller receives the control signal and controls the second servo motor 18 to drive the rotating plate 17 to rotate smoothly, changing the horizontal angle adjustment of the display screen 3. Similarly, to meet the needs of different application scenarios, this mechanism provides three intelligent adjustment modes: ① Fine adjustment mode - to achieve high-precision angle step adjustment of the rotating plate 17 in 0.1° increments; ② Fast adjustment mode: to adjust at a uniform speed of 5° / s, quickly completing the angle adjustment of the rotating plate 17; ③ Memory mode - to store 3 preset angles, eliminating the need for users to adjust each time, enabling quick use of this mechanism.

[0044] Combination Figure 7-Figure 8 As shown, this mechanism also includes: a light shield 19. Light shields 19 are rotatably installed on both the left and right sides of the display screen 3. The light shield 19 adopts a lightweight aluminum alloy frame with an anti-glare coating. The rear side of the display screen 3 is provided with a notch to accommodate the light shield 19. The structural depth of the notch is 1.2 times the thickness of the light shield 19. It is lined with sound-absorbing felt to ensure that the appearance of the display screen 3 is not affected when the light shield 19 is fully retracted, and to avoid abnormal response when the light shield 19 moves. The third servo motor 20 is fixedly installed at the bottom end of the display screen 3. The output end of the third servo motor 20 is fixedly installed with the light shield 19 using a coupling. The third servo motor 20 is electrically connected to the controller to realize remote control of the third servo motor 20 through a remote control device. A display screen image acquisition device 21 is fixedly installed on the top front of the display screen 3 to sense light intensity and angle. The display screen image acquisition device 21 is electrically connected to the controller. The display screen image acquisition device 21 monitors the image of the display screen 3 to detect whether there is glare on the display screen 3. Based on the degree of glare and the location of the glare area, it obtains a command to activate the light shield 19. If the light shield 19 needs to be activated, it sends an activation signal to the controller. The controller controls the third servo motor 20, which drives the light shield 19 to smoothly unfold from the slot, realizing stepless adjustment of the light shield 19 and ensuring smooth and shock-free movement of the light shield 19. Similarly, to meet the needs of different application scenarios, this device also provides three intelligent adjustment modes: ① Automatic mode - the light shield 19 automatically adjusts its angle according to the position of the glare area, which is convenient to use without user operation; ② Manual mode - the angle of the light shield 19 is directly controlled by the remote control device, cutting off the interaction with ambient light; ③ Memory mode - stores 3 sets of commonly used angles to achieve quick adjustment.

[0045] In summary, this mechanism utilizes the coordinated operation of the first servo motor 8 and the second servo motor 18, along with mechanical transmission, to achieve three-dimensional angle adjustment of the display screen 3: Vertical angle adjustment is achieved by the first servo motor 8 driving the screw 7 to rotate, causing the moving seat 6 to move linearly along the guide frame 5. The linear motion is then converted into angular displacement of the support frame 2 via the connecting rod 9. Horizontal rotation adjustment is achieved by the second servo motor 18 driving the rotating plate 17 to rotate smoothly, thus realizing stepless adjustment of the display screen 3 in all directions. Furthermore, the linkage between the main baffle 10 and the sub-baffle 12 ensures that the opening of the mounting box 1 is always sealed, preventing dust intrusion and improving the safety and aesthetics of the mechanism. In addition, the display screen image acquisition unit 21 monitors the light intensity in real time and controls the third servo motor 20 to control the light-shielding plate 19 to extend steplessly from the slot, forming an adaptive light-shielding system. The three servo motors support remote control device command input and can switch between three adjustment modes: precise, fast, and preset, ensuring operational accuracy and response speed.

[0046] Example 2: Based on the display screen flipping mechanism in Example 1, this application proposes a control method for the display screen flipping mechanism. The method includes: when the display screen 3 is turned on and a user is detected sitting in front of the display screen 3, identifying the offset angle between the user and the display screen 3, the offset angle being the angle between the perpendicular line from the midpoint of the user's eye to the center line of the display screen and the symmetrical section of the display screen, the symmetrical section being the plane perpendicular to the display screen where the center line of the display screen is located; according to the offset angle, controlling the second servo motor 18 to drive the rotating plate 17 to rotate the base 16 until the offset angle is within a first preset offset angle range; obtaining the angle between the user's horizontal line of sight and the current line of sight of the display screen 3, and based on the line of sight angle, controlling the first servo motor 8 to drive the support frame 2 to swing, so as to adjust the swing angle of the display screen 3 in the pitch direction until the line of sight angle is within a second preset offset angle range; the line of sight angle is the angle between the horizontal line of sight from the midpoint of the user's eye to the center line of the display screen and the center line of the display screen.

[0047] As can be seen, this application proposes a corresponding adjustment strategy based on the aforementioned three-dimensional angle adjustment of the display screen 3, enabling precise adaptation to the user's state under the controller and remote control device. This avoids the need for frequent adjustments to the angle of the display screen 3 for different users in scenarios such as school computer labs and internet cafes. First, when adjusting the angle of the display screen 3, this application embodiment needs to accurately obtain key data such as the offset angle between the user's face and the display screen, and the angle of view, by collecting the user's facial information. This provides a reliable basis for subsequent angle adjustments and ensures that the user is in a comfortable posture. All of the above operations are automatically swung to the target angle by the controller, which is connected to the sensors and servo motor signals. No manual adjustment by the user is required, simplifying the operation process. At the same time, the adapted angle can reduce visual fatigue when the user is watching, significantly improving the convenience and comfort of use.

[0048] Specifically, the execution subject of this application embodiment can be a controller or a remote control device, or the controller and the remote control device can coordinate to complete the task. Taking the controller as an example, the various sensors and servo motors configured inside the controller and the display screen flipping mechanism are all connected by signals. It includes a signal receiving module, a central processing unit, a signal output module, and a power management module. The signal receiving module can receive signals from different sensors and transmit the signals to the central processing unit. The central processing unit processes the received signals and finally converts the control commands of the central processing unit into drive signals that the servo motor can recognize to drive the motor to move and complete the corresponding angle adjustment.

[0049] The control method for the display screen flipping mechanism proposed in this application is described below, with the controller as the main actuator. This control method includes: S100. When the display screen 3 is turned on and a user is detected sitting in front of the display screen 3, the user's offset angle is identified. The offset angle is the angle between the perpendicular line from the midpoint of the user's eye to the center line of the display screen and the symmetrical section of the display screen. The symmetrical section is the plane perpendicular to the display screen 3 where the center line of the display screen is located. The display screen adjustment operation is triggered when the display screen 3 is turned on and when a user is detected entering the effective monitoring range (i.e., when a user is detected sitting in front of the display screen 3). Here, the turning on of the display screen 3 can be based on the computer's power-on signal, and the detection of a user entering the effective adjustment range can be based on the detection range of the user by the facial recognition sensor set at the top of the display screen. The monitoring range can be determined by the monitoring field of view of the facial recognition sensor. This is because when adjusting the display screen, information such as the user's posture and position is needed as an adjustment reference. Therefore, the angle adjustment of the display screen can only be triggered when the user enters the field of view of the facial recognition sensor. This also avoids the situation where the display screen makes useless adjustments when the user is only in front of the display screen 3 but has not yet entered the usage state.

[0050] The method for identifying the user's offset angle is as follows: the facial recognition sensor collects the angle between the perpendicular line from the midpoint of the user's eye to the center line of the display screen and the symmetrical section of the display screen; this angle is recorded as the offset angle. This offset angle reflects the relative positional relationship between the user's eye and the center line of the screen, and is used to guide the horizontal rotation of the display screen 3. This offset angle is α; for details, please refer to [link to relevant documentation]. Figure 12 As shown, Figure 12 The dashed lines in the image represent the perpendicular line from the midpoint of the user's eye to the center line of the screen, while the dotted lines represent symmetrical sections. The midpoint of the user's eye can be the center point between the two eyes. This view is a top view of the relationship between the user and the display screen.

[0051] Furthermore, since human posture is influenced by many factors, such as a user standing up, shaking their head, or communicating with a companion, in order to obtain a more accurate offset angle during the acquisition process, the offset angle can be sampled continuously over a period of time. The final offset angle is obtained by filtering out outlier data. For example, the offset angle set obtained within a preset time period can be as follows. A : Because in the set A Based on this, the data to be filtered out should be 100°, 10°, and 107°; the final offset angles are the following set of offset angles. : The final offset angle can be obtained by averaging all offset angle data samples within the offset angle set; no specific method is required.

[0052] S200. Based on the offset angle, if it is determined that the offset angle exceeds the first preset offset angle range, the second servo motor 18 is controlled to drive the rotating plate 17 to rotate the base 16 until the offset angle is within the first preset offset angle range.

[0053] Specifically, as mentioned above, the offset angle is used to guide the display screen 3 to rotate in the horizontal direction. Therefore, after obtaining the offset angle, it is necessary to determine whether the base 16 needs to be rotated and the direction and angle of rotation of the base 16 need to be determined based on the comparison between the current offset angle and the first preset offset angle range.

[0054] For example, suppose the first preset offset angle range is The calculated offset angle is +60°. The positive and negative signs before the angle are used to distinguish the incident direction of the perpendicular line from the user's eye to the center line of the display screen, and are used as directional symbols. It is stipulated that the + sign is used to indicate that the perpendicular line from the user's eye to the center line of the display screen is incident from the left side of the symmetrical section, and the - sign is used to indicate that the perpendicular line from the user's eye to the center line of the display screen is incident from the right side of the symmetrical section, but no special limitation is made.

[0055] Furthermore, based on the comparison between the first preset offset angle range and the current offset angle, it can be seen that the offset angle is not within the first preset offset angle range. Therefore, it is necessary to activate the posture adjustment of the display screen 3, and the angle to be adjusted is at least 50°. At the same time, according to the display of the directional symbols, it can also be seen that the user's eye center is located on the left side of the display screen 3. Therefore, the controller can send a control command to the second servo motor 18, so that the rotating plate 17 drives the base 16 to rotate to the left. .

[0056] In practical applications, the rotation angle of the rotating plate 17 can be obtained by the central processing unit of the controller based on the data generated by the facial recognition sensor (the central processing unit can calculate the rotation angle of the second servo motor 18 based on the difference between the offset angle and the first preset offset angle range), and output the final instruction information to the signal output module. The signal output module starts the second servo motor 18, so that the second servo motor 18 drives the rotating plate 17 to rotate the display screen 3 on the mounting box 1 by the corresponding angle, so that the offset angle is within the first preset offset angle range.

[0057] S300: Obtain the angle between the user's horizontal line of sight and the current display screen 3. Based on the angle of sight, if it is determined that the angle of sight exceeds the second preset offset angle range, control the first servo motor 8 to drive the support frame 2 to swing, so as to adjust the swing angle of the display screen 3 in the pitch direction until the angle of sight is within the second preset offset angle range. The angle of sight is the angle between the horizontal line of sight from the midpoint of the user's eye to the center line of the display screen and the center line of the display screen.

[0058] Next, once the display screen 3 is adjusted to the required horizontal position, the facial recognition sensor can continue to obtain the angle between the horizontal line of sight from the midpoint of the user's eye to the center line of the display screen and the current screen of the display screen 3, and adjust the angle of the display screen 3 in the tilt direction, that is, control the display screen 3 to adjust the tilt direction.

[0059] Specifically, the line-of-sight angle also needs to be obtained from multiple sets at different times, and outliers also need to be filtered out, which will not be elaborated here. The average of the line-of-sight angles is the final line-of-sight angle. Meanwhile, the line-of-sight angle here can be found in [reference needed]. Figure 13 The distance β shown is a side view of the relative position between the user and the display screen 3, with the dashed line representing the user's horizontal line of sight. This line of sight angle can be estimated using a face recognition sensor and a visual algorithm or a camera and a visual algorithm. For example, OpenCV can be used to detect the pupil of the human eye, and the angle between the current user's line of sight extending horizontally to the center line of the display screen and the screen can be calculated by combining the size of the pupil in the image with the focal length of the camera. Further details are omitted here. The final line of sight angle is compared with a second preset offset angle range to guide the tilt angle of the display screen 3. Here, the second preset offset angle range can be set as follows in this embodiment: This can be understood as if the angle between the lines of sight does not belong to... The range needs to be adjusted so that the current user can maintain a relatively comfortable posture when looking at the display screen 3, avoiding fatigue caused by looking up or down at the display screen 3 for a long time.

[0060] It should be noted that the principle behind "adjusting the tilt angle of display screen 3" mentioned here is the same as described above. Assuming the current viewing angle is 70°, based on a comparison with the upper limit of the second preset offset angle range, it can be determined that the screen tilt angle is too high, requiring adjustment of the tilt angle to control the display screen 3 to tilt forward. The required forward tilt angle of display screen 3 can be monitored in real-time by the central processing unit until the real-time adjustment of the viewing angle reaches the specified value. Within the range, the line of sight can be stopped when the angle is within the second preset offset angle range.

[0061] Furthermore, the adjustment of the tilt angle of the display screen 3 in the tilt and horizontal directions also includes: using the central processing unit to lock the current user's line of sight or the position of the center of the face equivalent to the screen, with 90° and 0° as the standard viewing angle and offset angle respectively. When making the corresponding angle adjustment, the adjustment angle required to reach the standard viewing angle and offset angle can be directly calculated. Taking the tilt adjustment of the display screen 3 as an example, if the viewing angle is 70°, the adjustment angle is 20°. After obtaining the adjustment angle, it needs to be converted into motor torque to generate the corresponding drive control command. Finally, the signal output module controls the first servo motor 8 to drive the screw 7 to rotate the corresponding angle according to the drive control command, so that the moving seat 6 can drive the connecting rod 9 and the support frame 2 to swing, and finally make the display screen 3 swing to the standard viewing angle.

[0062] It should be noted that this series of driving processes requires calibration of various data in the initial stage. For example, calibrating the linear distance that the moving block 6 on the screw 7 moves along the axis of the screw 7 for each revolution of the first servo motor 8, the moving distance / angle of the connecting rod 9 and the support frame 2 driven by the linear distance of the moving block 6, and the position of the screen center in the vertical plane under different swing angles of the support frame 2. In this way, the central processing unit can establish the corresponding mathematical model based on these data, and after locking the relative position of the screen center of the current display screen 3 and the human eye, directly output the corresponding drive control command. Since the conversion of control data can be referred to in the current field of mechanical automation control, it will not be elaborated here.

[0063] In a preferred embodiment, after adjusting the tilt angle of the display screen 3 in the pitch direction, the control method further includes the following steps: Step 1: Acquire an image of the screen surface of display screen 3 and convert the screen surface image into a grayscale image; Because the reflectivity and light source of the display screen 3 vary significantly in different scenarios and environments, in addition to adjusting the relative position of the display screen 3 and the user, it is also necessary to pay attention to the issue of screen reflection. First, it is necessary to collect an image of the screen surface of the display screen 3 and convert it into a grayscale image. This grayscale processing removes redundant information from the RGB color channels, thus retaining only the brightness characteristics directly related to reflection. This method is more conducive to the controller comprehensively capturing reflection information and avoiding missing key areas.

[0064] In practical applications, the above-mentioned "converting a screen surface image into a grayscale image" can be directly implemented using the cv2.cvtColor(image,cv2.COLOR_BGR2GRAY) function from visual libraries such as OpenCV. The grayscale value calculation formula is: Gray=0.299×R+0.587×G+0.114×B. In the final processed grayscale image, the brightness of each pixel is represented by a grayscale value of 0-255 (0 is pure black, 255 is pure white). Reflective areas will have high grayscale values ​​(such as 180-255) due to their high brightness, while non-reflective areas will have grayscale values ​​close to those of the screen's normal display (such as 50-150), laying the foundation for subsequent threshold comparison.

[0065] Step 2: Based on the comparison results of the gray values ​​of each pixel in the grayscale image with the preset brightness threshold, obtain the region contours of each reflective area on the screen surface. After obtaining the pixel values ​​in the grayscale image, the grayscale values ​​of each pixel are compared sequentially with a preset brightness threshold by iterating through the direction of each pixel. Pixels with grayscale values ​​greater than the preset brightness threshold are marked as reflective points to be confirmed. Then, morphological operations (such as dilation and erosion) are used to process all reflective points to be confirmed, removing isolated small noise areas and connecting adjacent reflective points to be confirmed to obtain multiple independent reflective areas, ensuring the integrity of the reflective area outline.

[0066] It should be noted that the preset brightness threshold here needs to be adjusted according to the actual ambient light and screen brightness, so it is not specifically limited in this embodiment.

[0067] Step 3: Based on the proportion of all reflective areas on the screen surface, obtain the reflective intensity of the current display screen 3, and control the third servo motor 20 to adjust the position of the light shield 19 according to the reflective intensity and the position of the reflective areas.

[0068] After obtaining the various reflective areas distributed on the screen of display screen 3, the proportion of all reflective areas on the screen surface can be calculated based on the sum of the current screen area of ​​display screen 3 and the area of ​​all reflective areas. After obtaining the proportion, the reflective intensity of display screen 3 can be determined by the magnitude of the proportion value. For example, if the current proportion value is between 0% and 15%, the central processing unit will determine it as slight reflection. If the proportion value is greater than 15%, it will be determined as severe reflection. This avoids the false triggering of light-blocking adjustment due to subjective judgment differences (e.g., if user A believes that the current reflection state is acceptable, the controller will not blindly start adjustment based on the previous user B's standard).

[0069] Next, after obtaining the reflection intensity, if it is confirmed that the current reflection intensity is slight reflection, the position of each reflection area is obtained. If the reflection area is close to the center of the screen, then the shading adjustment needs to be activated; otherwise, the shading adjustment does not need to be activated. In addition, if it is confirmed that the current reflection intensity is severe reflection, the shading adjustment is activated directly.

[0070] Specifically, regarding the confirmation of the relative positional relationship between the reflective area and the center of the screen, in this embodiment of the application, the display screen 3 is divided into regions for judgment; with the center of the display screen 3 as the origin of the ring, the area within ±1 / 3 of the screen center is the core area, that is, the area extending 1 / 3 of the corresponding side length of the screen in both the horizontal and vertical directions from the center of the screen as the origin; the area from the outer edge of the core area to ±2 / 3 (such as the middle ring outside the center area) is the intermediate transition area; the outermost ±1 / 3 of the screen (such as the four corners and the outermost edge area of ​​the screen) is the edge area; in this way, whether the light-blocking adjustment needs to be activated when the reflective intensity is in a state of slight reflection can be confirmed based on whether the reflective area falls into the core area.

[0071] Regarding the light-shielding adjustment operation, based on Embodiment 1, the current display screen flipping mechanism is equipped with a light-shielding plate 19 that can be driven to rotate by the third servo motor 20. Therefore, after obtaining the position of the reflective area, the corresponding side light-shielding plate 19 can be driven to block the incident light source. The specific steps are as follows: The position information of the reflective area is obtained, which is the position of the reflective area relative to the center of the display screen 3. For example, if the reflective area is located on the left side of the screen (including the left side of the core area and the left side of the transition area), then the source of the reflected light must also be from the left side of the user. Therefore, the light shield 19 located on the left side of the display screen 3 needs to be activated. In addition, the central processing unit can obtain the target rotation angle that the light shield 19 should adjust when blocking the current reflective area by the projection range of the light shield 19 on the display screen 3 with different pre-stored rotation angles. The target rotation angle can be directly analyzed by the central processing unit and a PWM drive command is sent to the third servo motor 20 through the signal output module to control the light shield 19 to rotate the target rotation angle to complete the light blocking operation.

[0072] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A display screen flipping mechanism, characterized in that, include: Mounting box (1), the upper part of which has an opening; Support frame (2), the support frame (2) is rotatably connected to the movable opening of the mounting box (1); The display screen (3) is fixedly connected to the top of the support frame (2); Fixing block (4), the mounting box (1) is fixedly connected to the fixing block (4); Guide frame (5), the guide frame (5) is fixedly connected inside the mounting box (1); Movable seat (6), the guide frame (5) is slidably connected to the movable seat (6); Screw (7), the mounting box (1) is rotatably connected to the screw (7), and the screw (7) is threadedly connected to the movable seat (6); The first servo motor (8) is fixedly connected to the fixed block (4), and the output end of the first servo motor (8) is fixedly connected to the screw (7). Link (9), the end of the support frame (2) is rotatably connected to the movable seat (6); The controller is connected to the first servo motor (8) via a signal. The controller is used to control the swing angle of the display screen (3) according to human needs.

2. The display screen flipping mechanism according to claim 1, characterized in that, The support frame (2) has a long and short lever arm structure. The short lever arm and the pivot of the support frame (2) are located inside the mounting box (1), and the long lever arm of the support frame (2) passes through the movable opening and is located outside the mounting box (1).

3. The display screen flipping mechanism according to claim 2, characterized in that, The mechanism also includes a main baffle (10), which is fixedly connected to the support frame (2). The main baffle (10) is located at the movable opening of the mounting box (1) and completely blocks the movable opening in the initial state.

4. The display screen flipping mechanism according to claim 3, characterized in that, The mechanism also includes a guide rod (11), which is fixedly connected inside the mounting box (1). Sub-baffle (12), the guide rod (11) is slidably connected to the sub-baffle (12), and the sub-baffle (12) is slidably connected to the main baffle (10); A reset spring (13) is sleeved on the guide rod (11), and the reset spring (13) is fixed between the mounting box (1) and the sub-baffle (12).

5. The display screen flipping mechanism according to claim 4, characterized in that, The mechanism also includes a slide rail (14), which is fixedly connected inside the mounting box (1). Rollers (15) are rotatably connected to the sub-baffle (12) and the main baffle (10). The main baffle (10) has wheel grooves (103) on both sides inside. The sub-baffle (12) slides with the main baffle (10) through the cooperation of the rollers (15) and the wheel grooves (103). When the rollers (15) on the sub-baffle (12) move to the end of the wheel grooves (103), the main baffle (10) can drive the sub-baffle (12) to move. The main baffle (10) rolls in contact with the slide rail (14) through the rollers (15) on it.

6. The display screen flipping mechanism according to claim 5, characterized in that, The mechanism also includes: a base (16); Rotating plate (17), the base (16) is rotatably connected to the rotating plate (17), and the mounting box (1) is fixedly connected to the rotating plate (17); The second servo motor (18) is fixedly connected inside the base (16), and the output end of the second servo motor (18) is fixed to the rotating plate (17).

7. The display screen flipping mechanism according to claim 6, characterized in that, The mechanism also includes a light shield (19), which is rotatably connected to the display screen (3).

8. The display screen flipping mechanism according to claim 7, characterized in that, The mechanism also includes: a third servo motor (20), which is fixedly connected to the display screen (3), and the output end of the third servo motor (20) is fixed to the light shield (19); The display screen image acquisition device (21) is fixedly connected to the top front of the display screen (3), and the display screen image acquisition device (21) is electrically connected to the third servo motor (20).

9. A control method for a display screen flipping mechanism, characterized in that, The control method, applied to the display screen flipping mechanism according to any one of claims 1-8, comprises: When the display screen (3) is turned on and a user is detected sitting in front of the display screen (3), the user's offset angle is identified. The offset angle is the angle between the perpendicular line from the midpoint of the user's eye to the center line of the display screen and the symmetrical section of the display screen. The symmetrical section is the plane where the center line of the display screen is located and is perpendicular to the display screen (3). According to the offset angle, if it is determined that the offset angle exceeds the first preset offset angle range, then control the second servo motor (18) to drive the rotating plate (17) to drive the base (16) to rotate until the offset angle is within the first preset offset angle range; The angle between the user's horizontal line of sight and the current display screen (3) is obtained. Based on the angle of sight, if it is determined that the angle of sight exceeds the second preset offset angle range, the first servo motor (8) is controlled to drive the support frame (2) to swing, so as to adjust the swing angle of the display screen (3) in the pitch direction until the angle of sight is within the second preset offset angle range. The angle of sight is the angle between the horizontal line of sight from the midpoint of the user's eye to the center line of the display screen and the center line of the display screen.

10. The control method for the display screen flipping mechanism according to claim 9, characterized in that, The control method also includes: Acquire an image of the screen surface of the display screen (3) and convert the image of the screen surface into a grayscale image; Based on the comparison between the grayscale value of each pixel in the grayscale image and the preset brightness threshold, the reflective areas on the screen surface are obtained. The reflectivity of the current display screen (3) is obtained based on the proportion of all the reflective areas on the screen surface, and the position of the third servo motor (20) is adjusted according to the reflectivity and the position of the reflective areas.

Images