Display screen detection device and method

Abstract

The present invention discloses a display screen detection device and method, including an equipment frame and a visual camera, wherein a support platform is rotatably installed on the top of the equipment frame, and a driving motor is installed on the equipment frame; an abutment plate is slidably arranged in the slide seat, and an elastic member acting as the abutment plate is arranged in the slide seat, a push rod is slidably arranged in the support arm, and a magnetic member is arranged on the support arm; a transmission member is arranged on the equipment frame, and the slide seat drives the corresponding rotary sleeve to rotate through the transmission member when sliding. In the present invention, firstly, through the arrangement of the elastic member and the magnetic member, after the display screen is centered, the visual camera will also follow to a position close to the side of the display screen, so as to meet the precise detection of display screens of different sizes, and secondly, as the two slide seats slide into place, the visual camera performs defect detection on the unobstructed side of the screen that is neatly placed relative to the support platform, which is conducive to ensuring the perfection and accuracy of the detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen detection, and in particular to a display screen detection device and method. Background Art

[0002] Display screen is a device that converts electronic signals into visual images and is widely used in electronic products such as televisions, computers, and mobile devices. Display screen defect detection is a key link in ensuring display quality. Machine vision systems are used for optical inspection to determine whether the product appearance is qualified.

[0003] In the prior art, according to patent application number: CN202111409212.1, a display screen edge defect detection device controls a visual camera to perform a rectangular surround rotation outside the display screen to achieve multi-directional edge defect detection of the display screen. However, the prior art has the following problems:

[0004] Since the rectangular slide rail that cooperates with the sliding of the limiting roller is fixed on the main body, the guide path of the rectangular slide rail cannot be adjusted at will, so that the visual camera can only perform surround detection on the outer edge of a specific model of display screen along a fixed line, resulting in poor applicability of the existing detection device.

[0005] In the process of the visual camera rectangular surround detecting the display screen, as the lifting and rotating cylinder rotates, the shooting angle of the visual camera lens relative to the same side of the display screen will also change accordingly, resulting in the problem of deviation in detection data. Summary of the invention

[0006] The purpose of the present invention is to provide a display screen detection device and method to solve the above problems.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a display screen detection device, including an equipment frame and a visual camera, the top of the equipment frame is rotatably mounted with a support table that matches the display screen frame, the equipment frame is mounted with a driving motor that controls the rotation of the support table, the equipment frame is mounted with two slides and a second power rail that controls the horizontal movement of the two slides, the slide is mounted with a visual camera and a first power rail that controls the sliding of the visual camera;

[0008] A contact plate is slidably arranged in the slide seat, an elastic member acting on the contact plate is arranged in the slide seat, a first pressing member driving the contact plate to move upward relative to the slide seat is arranged on the equipment frame, two pairs of rotary sleeves corresponding to the slide seats are rotatably connected on the equipment frame, a support arm is fixed on the rotary sleeve, a push rod is slidably arranged in the support arm, a magnetic attraction member acting on the push rod is arranged on the support arm, and a second pressing member driving the push rod to move downward relative to the support arm is arranged on the equipment frame;

[0009] The equipment frame is provided with a transmission member, and the sliding seat drives the corresponding rotating sleeve to rotate through the transmission member when sliding.

[0010] Preferably, the sliding seat is formed with a transverse groove and a vertical groove for cooperating with the movement of the abutment plate, a sliding block is slidably embedded inside the abutment plate, a cross bar is fixed on the sliding block, a sliding cavity is formed in the sliding seat, and a limit plate fixed to the cross bar is slidably embedded in the sliding cavity.

[0011] Preferably, the elastic member comprises a return spring arranged in the sliding cavity for pressing the limit plate outwards, and the bottom of the sliding block is abutted against a compression spring acting downward against the plate.

[0012] Preferably, the first pressing member comprises a trapezoidal block fixed on a slide seat, a groove is formed at the bottom of the slide seat for sliding through the trapezoidal block, and an inclined surface is formed at the bottom of the abutment plate for slidingly fitting with the inclined surface of the trapezoidal block.

[0013] Preferably, a sliding rod is fixedly provided on the push rod, and a sliding groove cooperating with the horizontal sliding of the sliding rod and an open groove cooperating with the vertical sliding of the push rod are formed in the support arm, and the open groove is connected to the sliding groove.

[0014] Preferably, the magnetic attraction component includes a shell sleeve fixed on the support arm, a slide is slidably connected to the shell sleeve, and a slide rod slides through the slide, a magnetic ring for magnetically attracting an upward push rod is fixed at the bottom of the slide, and a magnetic block for magnetically attracting the slide is fixed on the inner wall of the shell sleeve.

[0015] Preferably, the second pressing member includes a column fixedly mounted on the equipment frame and corresponding to the rotating sleeve, the column having a bracket fixedly mounted at one end thereof that passes through the support arm upward, a push block fixedly mounted at the bottom of the bracket, and the end surface of the push block that slides in contact with the slide rod forms a slope that presses the slide rod downward.

[0016] Preferably, the transmission member includes a sliding frame slidably arranged in the equipment frame corresponding to the rotary sleeve, and a component driving the sliding frame to slide. A wheel disc is rotatably connected to the equipment frame. When the sliding frame slides, the wheel disc is driven to rotate through a linkage component. A chain for meshing transmission is provided on the outer side of the wheel disc and the rotary sleeve.

[0017] Preferably, the component driving the sliding frame to slide comprises a round block fixed to the bottom of the slide seat, and a strip groove cooperating with the sliding of the round block is formed in the sliding frame, and the strip groove consists of an oblique section and a transverse section.

[0018] Preferably, the linkage assembly includes a first swing arm rotatably connected to the bottom of the equipment frame and coaxially fixed with the wheel disc, the free end of the first swing arm is rotatably connected to the second swing arm, and the second swing arm is rotatably connected to the sliding frame via a rotating shaft that slides through the equipment frame.

[0019] A detection method for a display screen detection device, the detection method comprising the following steps:

[0020] S1, place the display screen on the equipment rack, and control the two slides to move toward the side of the display screen through the second power rail;

[0021] S2, after the opposite sides of the display screen are centered by the push rod and the abutment plate, the first power rail is started to control the movement of the visual camera to detect the side of the display screen;

[0022] S3, start the second power rail to control the two slides to move in the opposite direction, and control the rotation of the support table through the drive motor to switch the side of the display screen;

[0023] S4. Execute steps S1 and S2 to complete a comprehensive inspection of the side of the display screen.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present application, by setting the elastic part and the magnetic part, after the push rod completes the centering correction of the side of the screen, it can automatically release the blocking of the side of the display screen upwards under the action of the magnetic part. When the abutment plate completes the centering correction of the other two sides of the display screen, it can automatically release the blocking of the side of the display screen downwards under the action of the elastic part, so that the device can meet the needs of centering screens of different sizes. After the display screen is centered, the visual camera will also follow to a position close to the side of the display screen, so as to meet the precise detection of display screens of different sizes.

[0026] 2. When the two slides move in opposite directions, the push rod acts on the sides of the display screen, so that two sides of the display screen are first centered relative to the support platform, and then the two abutment plates act on the other two opposite sides of the display screen, driving the display screen to be centered relative to the support platform. As the two slides slide into place, the visual camera performs defect detection on the unobstructed sides of the screen that is neatly placed relative to the support platform, which is conducive to ensuring the perfection and accuracy of the detection results.

[0027] 3. In the present application, the visual camera is controlled by the first power guide rail to slide horizontally along the slide seat to detect edge defects of the display screen. During the mobile detection process, the lens of the visual camera always maintains an equidistant and unchanged angle with the edge of the display screen, thereby meeting the requirements for accurate detection of the side of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional schematic diagram of a detection device provided according to an embodiment of the present invention is shown;

[0029] Figure 2A schematic diagram of an exploded structure of a detection device provided according to an embodiment of the present invention is shown;

[0030] Figure 3 A schematic diagram of the matching structure of a slide seat and a trapezoidal block according to an embodiment of the present invention is shown;

[0031] Figure 4 A cross-sectional schematic diagram of a slide provided according to an embodiment of the present invention is shown;

[0032] Figure 5 A cross-sectional schematic diagram of an equipment rack provided according to an embodiment of the present invention is shown;

[0033] Figure 6 A cross-sectional schematic diagram of a support arm provided according to an embodiment of the present invention is shown.

[0034] Legend:

[0035] 1. Equipment rack; 2. Driving motor; 3. Support platform; 4. Slide seat; 5. First power guide rail; 6. Visual camera; 7. Abutment plate; 8. Sliding block; 9. Compression spring; 10. Cross bar; 11. Limiting plate; 12. Reset spring; 13. Trapezoidal block; 1301. Horizontal groove; 1302. Vertical groove; 14. Second power guide rail; 15. Sliding frame; 16. Strip groove; 17. Round block; 18. Column; 19. Bracket; 20. Push block; 21. Rotary sleeve; 22. Wheel; 23. Chain; 24. First rotary arm; 25. Second rotary arm; 26. Support arm; 27. Push rod; 28. Sliding rod; 29. ​​Shell; 30. Slide plate; 31. Magnetic ring; 32. Magnetic block; 33. Slide groove; 34. Open groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-6 The present invention provides a technical solution: a display screen detection device, including an equipment frame 1 and a visual camera 6, a support 3 for cooperating with the display screen frame is rotatably installed on the top of the equipment frame 1, a driving motor 2 for controlling the rotation of the support 3 is installed on the equipment frame 1, two slides 4 and a second power guide rail 14 for controlling the horizontal movement of the two slides 4 are installed on the equipment frame 1, and a visual camera 6 and a first power guide rail 5 for controlling the sliding of the visual camera 6 are installed on the slide 4.

[0038] The first power rail 5 and the second power rail 14 are driven by existing motors, pneumatic or hydraulic systems. A ball bearing that rotates on the support 3 to cooperate with the moving contact of the display is used to reduce the friction between the support 3 and the screen. The two slides 4 are controlled by the second power rail 14 to move toward the side opposite the display screen, and then the visual camera 6 is controlled by the first power rail 5 to slide horizontally along the slide 4. The visual camera 6 moves along the outside of the display screen to detect edge defects of the display screen. After completing the defect detection of the two opposite sides of the display screen, the two slides 4 are controlled by the second power rail 14 to move and open, and then the support 3 is controlled by the driving motor 2 to drive the display screen to rotate, and the edge of the display screen to be detected is switched, thereby achieving a comprehensive detection of the edge of the display screen.

[0039] Visual camera 6 defect detection is an existing technology and a quality control technology widely used in industrial automation. Its core principle is to use machine vision system to identify defects in display screens. First, the image of the side of the display screen is acquired through the cooperation of camera, lens and light source. The acquired image data will be preprocessed to enhance the image features and make them more obvious. Based on the image preprocessing, the features in the image are finally extracted through algorithms. These features include the shape, size and other attributes of the defects.

[0040] A contact plate 7 is slidably arranged in the slide 4, an elastic member acting on the contact plate 7 is arranged in the slide 4, a first pressing member driving the contact plate 7 to move upward relative to the slide 4 is arranged on the equipment frame 1, two pairs of rotary sleeves 21 corresponding to the slide 4 are rotatably connected on the equipment frame 1, a support arm 26 is fixed on the rotary sleeve 21, a push rod 27 is slidably arranged in the support arm 26, a magnetic attraction member acting on the push rod 27 is arranged on the support arm 26, and a second pressing member driving the push rod 27 to move downward relative to the support arm 26 is arranged on the equipment frame 1.

[0041] When the two slides 4 move in opposite directions, the rotary sleeve 21 will drive the support arm 26 to rotate under the action of the transmission member. During this process, the push rod 27 acts on the side of the display screen, so that two sides of the display screen are first placed in the center relative to the support platform 3. As the two slides 4 continue to approach the display screen, the push rod 27 will release the blocking state of the side of the display screen under the action of the magnetic suction member, and the two abutment plates 7 will act on the other two opposite sides of the display screen, thereby driving the display screen to be arranged in the center relative to the support platform 3. As the two slides 4 slide into place, the abutment plates 7 will release the blocking state of the corresponding sides of the display screen under the action of the elastic member, so that the visual camera 6 can perform defect detection on the unobstructed side of the screen that is neatly placed relative to the support platform 3, which is conducive to ensuring the perfection and accuracy of the detection results.

[0042] By setting the elastic part and the magnetic part, after the push rod 27 completes the centering correction of the side of the screen, it can automatically release the blocking of the side of the display screen upwards under the action of the magnetic part, thereby not restricting the slide 4 from continuing to approach the side of the display screen; when the abutment plate 7 completes the centering correction of the other two sides of the display screen, it can automatically release the blocking of the side of the display screen downwards under the action of the elastic part, thereby enabling the device to meet the requirements of centering adjustment of screens of different sizes, and after the display screen is centered, the visual camera 6 will also follow to a position close to the side of the display screen, so as to meet the requirements of accurate detection of display screens of different sizes.

[0043] The equipment frame 1 is provided with a transmission member, and the slide 4 drives the corresponding rotary sleeve 21 to rotate through the transmission member when sliding. Through the setting of the transmission member, when the slide 4 starts to approach the screen, the rotary sleeve 21 rotates under the action of the transmission member, and two opposite sides of the display screen are centered.

[0044] Specifically, Figure 2-4 As shown, a transverse groove 1301 and a vertical groove 1302 for cooperating with the movement of the abutment plate 7 are formed in the slide seat 4, a slider 8 is slidably embedded inside the abutment plate 7, a cross bar 10 is fixed on the slider 8, a sliding cavity is formed in the slide seat 4, a limit plate 11 fixed to the cross bar 10 is slidably embedded in the sliding cavity; the elastic member includes a return spring 12 arranged in the sliding cavity for pressing the limit plate 11 outward, and the bottom of the slider 8 is abutted against a compression spring 9 that acts downward on the abutment plate 7.

[0045] After the abutment plate 7 completes the centering of the opposite sides of the display screen, as the two slide seats 4 continue to move toward each other, the abutment plate 7 will drive the slider 8 to slide along the horizontal groove 1301 under the pressure of the side of the display screen. During this process, the cross bar 10 fixed to the slider 8 will extend into the sliding cavity along the sliding cavity and compress the reset spring 12. When the abutment plate 7 slides to the intersection of the horizontal groove 1301 and the vertical groove 1302, the abutment plate 7 will slide downward along the vertical groove 1302 under the elastic force of the compression spring 9, thereby releasing the blocking of the side of the display screen.

[0046] The first pressing member includes a trapezoidal block 13 fixed on the slide 4. The bottom of the slide 4 is formed with a groove for the trapezoidal block 13 to slide through. The bottom of the abutment plate 7 is formed with an inclined surface for the trapezoidal block 13 to slide in contact with.

[0047] When the two slides 4 are reset in the opposite direction, as the slides 4 slide, the abutment plate 7 will slide upward along the vertical groove 1302 of the slide 4 under the pressure of the inclined surface of the trapezoidal block 13. When the abutment plate 7 slides upward to the horizontal top end surface of the trapezoidal block 13, as the deformation of the reset spring 12 is restored, the slider 8 fixed to the cross bar 10 will drive the abutment plate 7 to move and reset relative to the slide 4. Through the setting of the first pressure piece, after the two slides 4 are reset by sliding in the opposite direction, the abutment plate 7 automatically returns to its original position elastically relative to the slide 4, so that the next time the two slides 4 are close to the display screen, the abutment plate 7 continues to meet the push correction of the side of the display screen.

[0048] Specifically, Figure 2 , Figure 5 and Figure 6 As shown, a slide bar 28 is fixed on the push rod 27, and a slide groove 33 for cooperating with the slide bar 28 for horizontal sliding and an open groove 34 for cooperating with the push rod 27 for vertical sliding are formed in the support arm 26, and the open groove 34 is connected to the slide groove 33; the magnetic attraction component includes a shell sleeve 29 fixed on the support arm 26, a slide plate 30 is slidably connected in the shell sleeve 29, and the slide bar 28 slides through the slide plate 30, a magnetic attraction ring 31 for magnetically attracting the push rod 27 upward is fixed at the bottom of the slide plate 30, and a magnetic block 32 for magnetically attracting the slide plate 30 is fixed on the inner wall of the shell sleeve 29.

[0049] When the push rod 27 is on the side of the display screen and corrects the center of the display screen, as the support arm 26 continues to rotate, the push rod 27 will drive the slide plate 30 to separate from the magnetic block 32 through the slide rod 28 under the resistance of the side of the display screen. When the slide rod 28 slides from the slide groove 33 into the open groove 34, the push rod 27 will penetrate the open groove 34 upward and be attracted by the magnetic ring 31.

[0050] The second pressing member includes a column 18 fixedly mounted on the equipment frame 1 and corresponding to the rotary sleeve 21. The column 18 has a bracket 19 fixedly mounted on one end thereof that passes through the support arm 26 upward. A push block 20 is fixedly mounted on the bottom of the bracket 19. The end surface of the push block 20 that slides in contact with the slide rod 28 forms a slope that presses the slide rod 28 downward.

[0051] When the support arm 26 is reset as the rotary sleeve 21 rotates, as the support arm 26 rotates to the bottom of the bracket 19, the slide bar 28 of the slide plate 30 extends upward, and will drive the push rod 27 to withdraw downward from the outlet groove 34 under the pressure of the slope of the push block 20. Subsequently, the slide plate 30 will drive the slide bar 28 and the push rod 27 to slide horizontally and reset under the magnetic attraction of the magnetic block 32, so that the next time the support arm 26 turns to the display screen, the push rod 27 continues to meet the push correction of the side of the display screen.

[0052] Ribs are arranged on the inner wall of the slide plate 30, and limiting grooves are formed on the side walls of the slide bar 28 to cooperate with the sliding of the ribs. The ribs and the limiting grooves are arranged to limit the sliding range of the slide bar 28, thereby preventing the slide bar 28 from falling off the slide plate 30 downward.

[0053] Specifically, Figure 1 , Figure 2 and Figure 5 As shown, the transmission member includes a sliding frame 15 slidably arranged in the equipment frame 1 corresponding to the rotary sleeve 21, and a component driving the sliding frame 15 to slide. A wheel plate 22 is rotatably connected to the equipment frame 1. When sliding, the sliding frame 15 drives the wheel plate 22 to rotate through the linkage component. The outer side of the wheel plate 22 and the rotary sleeve 21 is provided with a chain 23 for meshing transmission.

[0054] When the wheel disc 22 rotates, the rotary sleeve 21 will rotate synchronously under the meshing action of the chain 23 , and meshing teeth for meshing with the chain 23 are formed on the side walls of the wheel disc 22 and the rotary sleeve 21 .

[0055] The components driving the sliding frame 15 to slide include a round block 17 fixed to the bottom of the slide seat 4. A strip groove 16 for matching the round block 17 to slide is formed in the sliding frame 15. The strip groove 16 consists of an oblique section and a transverse section.

[0056] A notch is formed on the equipment frame 1 to cooperate with the sliding of the sliding frame 15. When the slide seat 4 slides toward the support platform 3, the round block 17 fixed at the bottom of the slide seat 4 will first slide along the oblique section of the strip groove 16. The round block 17 presses the oblique section to drive the sliding frame 15 to slide along the notch. When the round block 17 slides along the lateral section of the strip groove 16, the sliding frame 15 will remain stationary relative to the notch.

[0057] The linkage assembly includes a first swing arm 24 rotatably connected to the bottom of the equipment frame 1 and coaxially fixed with the wheel disc 22. The free end of the first swing arm 24 is rotatably connected to the second swing arm 25. The second swing arm 25 is rotatably connected to the sliding frame 15 via a rotating shaft that slides through the equipment frame 1.

[0058] When the sliding frame 15 slides along the notch, the second swing arm 25 rotatably connected to the bottom of the sliding frame 15 will act on the first swing arm 24, driving the first swing arm 24 to drive the wheel plate 22 coaxially fixed therewith to rotate.

[0059] Specifically, Figure 1-6 As shown, a detection method for a display screen detection device comprises the following steps:

[0060] S1, the display is placed on the equipment rack 1, through the second power rail 14 to control the two slides 4 move toward the side of the display;

[0061] S2, through the push rod 27 and the abutment plate 7 on the opposite side of the display screen is centered, the first power rail 5 is started to control the visual camera 6 to move, the side of the display screen is detected;

[0062] S3, start the second power rail 14 to control the two slides 4 to move in the opposite direction, and through the drive motor 2 to control the carriage 3 to rotate, the side of the display switch;

[0063] S4. Execute steps S1 and S2 to complete a comprehensive inspection of the side of the display screen.

[0064] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display screen detection device, comprising a device frame and a visual camera, characterized in that: A support platform for matching the display screen is rotatably mounted on the top of the equipment rack, a driving motor for controlling the rotation of the support platform is mounted on the equipment rack, two slides and a second power rail for controlling the horizontal movement of the two slides are mounted on the equipment rack, a visual camera and a first power rail for controlling the sliding of the visual camera are mounted on the slide; A contact plate is slidably arranged in the slide seat, an elastic member acting on the contact plate is arranged in the slide seat, a first pressing member driving the contact plate to move upward relative to the slide seat is arranged on the equipment frame, two pairs of rotary sleeves corresponding to the slide seats are rotatably connected on the equipment frame, a support arm is fixed on the rotary sleeve, a push rod is slidably arranged in the support arm, a magnetic attraction member acting on the push rod is arranged on the support arm, and a second pressing member driving the push rod to move downward relative to the support arm is arranged on the equipment frame; A transmission member is provided on the equipment frame, and when the slide seat slides, the transmission member drives the corresponding rotary sleeve to rotate; The slide seat is formed with a transverse groove and a vertical groove for cooperating with the movement of the abutting plate, a slider is slidably embedded in the interior of the abutting plate, a cross bar is fixed on the slider, a sliding cavity is formed in the slide seat, a limit plate fixed with the cross bar is slidably embedded in the sliding cavity, the elastic member includes a return spring arranged in the sliding cavity to press the limit plate outward, and the bottom of the slide block is abutted with a compression spring that acts downward on the abutting plate; A slide bar is fixed on the push rod, and a slide groove for horizontal sliding of the slide bar and an open groove for vertical sliding of the push rod are formed in the support arm, and the open groove is connected with the slide groove; The magnetic attraction component includes a shell sleeve fixed on the support arm, a slide plate is slidably connected in the shell sleeve, and a slide rod slides through the slide plate, a magnetic attraction ring for an upward magnetic push rod is fixed at the bottom of the slide plate, and a magnetic block for the magnetic slide plate is fixed on the inner wall of the shell sleeve.

2. A display screen detection device according to claim 1, characterized in that: The first pressing member comprises a trapezoidal block fixed on the slide seat, the bottom of the slide seat is formed with a groove for the trapezoidal block to slide through, and the bottom of the abutting plate is formed with an inclined surface for slidingly fitting with the inclined surface of the trapezoidal block.

3. A display screen detection device according to claim 1, characterized in that: The second pressing member includes a column fixedly mounted on the equipment frame and corresponding to the rotating sleeve. The column passes through one end of the support arm upward and is fixedly provided with a bracket. A push block is fixedly provided at the bottom of the bracket. The end surface of the push block that slides in contact with the slide rod forms a slope that presses the slide rod downward.

4. A display screen detection device according to claim 1, characterized in that: The transmission member includes a sliding frame slidably arranged in the equipment frame corresponding to the rotating sleeve, and a component driving the sliding frame to slide. A wheel disc is rotatably connected to the equipment frame. When the sliding frame slides, the wheel disc is driven to rotate through the linkage component. A chain for meshing transmission is provided on the outer side of the wheel disc and the rotating sleeve.

5. A display screen detection device according to claim 4, characterized in that: The component driving the sliding frame to slide comprises a round block fixed at the bottom of the slide seat, and a strip groove matching the sliding of the round block is formed in the sliding frame, and the strip groove consists of an oblique section and a transverse section.

6. A display screen detection device according to claim 4, characterized in that: The linkage assembly comprises a first swing arm rotatably connected to the bottom of the equipment frame and fixed coaxially with the wheel disc, a free end of the first swing arm is rotatably connected to a second swing arm, and the second swing arm is rotatably connected to the sliding frame through a rotating shaft that slides through the equipment frame.

7. A detection method based on the display screen detection device according to any one of claims 1 to 6, characterized in that: The detection method includes the following steps: S1, place the display screen on the equipment rack, and control the two slides to move toward the side of the display screen through the second power rail; S2, after the opposite sides of the display screen are centered by the push rod and the abutment plate, the first power rail is started to control the movement of the visual camera to detect the side of the display screen; S3, start the second power rail to control the two slides to move in the opposite direction, and control the rotation of the support table through the drive motor to switch the side of the display screen; S4. Execute steps S1 and S2 to complete a comprehensive inspection of the side of the display screen.

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