Device and method for rapidly detecting defects of LED display screen

Abstract

The invention belongs to the field of display screen detection, and particularly relates to LED display screen defect rapid detection equipment and method.The LED display screen defect rapid detection equipment comprises a detection table, and a mark type visual detection assembly is arranged on the detection table; the marking type visual detection assembly comprises first cross beams fixedly connected to the two sides of the upper end face of the detection table, a second cross beam is jointly connected between the two first cross beams in a sliding mode, a sliding block is connected to one side of the second cross beam in a sliding mode, two first guide rods are connected to the sliding block in a sliding mode, and detection cameras are fixedly connected to the lower ends of the first guide rods. And a marking pen is arranged on one side of the detection camera. According to the invention, the marking type visual detection assembly is utilized, when one defect is detected, the marking pen is utilized to mark the corresponding position of the screen, and during subsequent maintenance, maintenance personnel can determine the position of the defect by observing the mark.

Description

Technical Field

[0001] This invention belongs to the field of display screen inspection, specifically a rapid defect detection device and method for LED display screens. Background Technology

[0002] LED displays are a new type of imaging electronic device made by arranging light-emitting diodes in sequence. Due to their high brightness, wide viewing angle, and long lifespan, they are widely used in products such as outdoor advertising screens. During the manufacturing process, improper installation or malfunctions in the circuitry, optical films, and other structures can easily lead to gray-black dot-like defects when the screen is lit. To prevent defective LED displays from entering subsequent use, defect detection is necessary.

[0003] Patent CN214121967U discloses an optical device for dust removal during surface defect detection of LCD screens, relating to the field of display screen inspection. The device includes a placement stage, LED lights, a support frame, and an LCD screen. The support frame is fixedly installed on the upper end of the placement stage, and a CCD camera is placed on top of the support frame. LED lights are fixedly installed on both sides of the placement stage, and the LCD screen is placed between adjacent LED lights. A power supply device for providing power to the LCD screen is installed on one side above the placement stage. This patent, by setting up a placement stage, LED lights, support frame, CCD camera, and power supply device, first illuminates the screen, allowing the CCD to capture defects and dust. Then, the screen is turned off, and the CCD can only capture dust on the screen. Finally, by combining the results of the above two steps, dust can be accurately removed, and the location of defects can be determined, solving the technical problem of false detection in existing inspection methods.

[0004] However, the above technical solutions still have the following shortcomings in practical applications:

[0005] When performing defect detection on an LED display screen, the screen is first turned on, and then a CCD camera is used to take a picture of the screen. The picture is then uploaded to an image analysis system to detect whether the screen has defects. If a defect is detected, repair is required.

[0006] However, LED displays are typically inspected in batches, and defective displays are repaired after the inspection. During the repair process, due to the large number of LED displays, repair personnel find it difficult to accurately remember the location of the defect for each one, thus affecting repair efficiency. Furthermore, even if the fault location is recorded using a mobile phone, computer, or paper, repeated searching and verification are necessary during repair, which is cumbersome and prone to confusion. Summary of the Invention

[0007] To overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a rapid detection device and method for defects in LED displays.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a rapid defect detection device for LED display screens, including a detection platform, wherein a marker-type visual inspection component is provided on the detection platform;

[0009] The marking-type visual inspection component includes a crossbeam 1 fixedly connected to both sides of the upper surface of the inspection platform, a crossbeam 2 slidably connected between the two crossbeams 1, a slider slidably connected to one side of the crossbeam 2, two guide rods 1 slidably connected to the slider, an inspection camera fixedly connected to the lower end of the guide rods, and a marker pen provided on one side of the inspection camera.

[0010] It also includes marker-assisted protection components;

[0011] The marking auxiliary protection component includes a roller rotatably mounted on one side of the upper surface of the testing platform, with a film wound around the roller. A fixing frame is fixedly connected to one side of the upper surface of the testing platform, and two guide rods are slidably connected to the fixing frame. A blade is fixedly connected to the upper end of the two guide rods. A support column is fixedly connected to one side of the upper surface of the testing platform, and a rack is slidably connected to the upper end of the support column. A transverse plate is fixedly connected to one end of the rack, and two finger cylinders are fixedly connected to one side of the transverse plate.

[0012] Preferably, one end of the crossbeam 2 is threadedly connected to a threaded rod 1, both ends of the threaded rod 1 are rotatably mounted on the crossbeam 1, one end of the crossbeam 1 is fixedly connected to a motor 5, the output end of the motor 5 is fixedly connected to one end of the threaded rod 1, one end of the slider is threadedly connected to a threaded rod 2, both ends of the threaded rod 2 are rotatably mounted on the crossbeam 2, one side of the crossbeam 2 is fixedly connected to a motor 6, the output end of the motor 6 is fixedly connected to one end of the threaded rod 2, one side of the slider is fixedly connected to a cylinder 2, the piston end of the cylinder 2 is fixedly connected to one side of the detection camera.

[0013] Preferably, a motor is fixedly connected to one side of the upper end of the testing platform, and the output end of the motor is fixedly connected to one end of the roller. Two support rods are fixedly connected to one side of the testing platform, and a sliding column is fixedly connected to the upper end of the support rod. The two sliding columns are slidably connected to a pressure roller, and a support roller is fixedly connected between the two support rods. A spring is sleeved on one side of the sliding column, and one end of the spring is fixedly connected to one end of the pressure roller, and the other end is fixedly connected to the end of the sliding column.

[0014] Preferably, a cylinder three is fixedly connected to one side of the fixing frame, and the piston end of the cylinder three is fixedly connected to one side of the bottom of the blade.

[0015] Preferably, a gear is rotatably mounted on one side of the upper end of the support column, the gear meshing with a rack, and a motor is fixedly connected to one side of the upper end of the support column, the output end of the motor being fixedly connected to the gear.

[0016] Preferably, it also includes a display positioning component;

[0017] The display screen positioning assembly includes two positioning plates, which are symmetrically slidably arranged on both sides of the upper surface of the testing platform. A bidirectional threaded rod is rotatably provided on one side of the upper surface of the testing platform, and the two sides of the bidirectional threaded rod are respectively threaded to the two positioning plates. A motor is fixedly connected to one side of the upper surface of the testing platform, and the output end of the motor is fixedly connected to one end of the bidirectional threaded rod.

[0018] Preferably, it also includes reinforcement auxiliary components;

[0019] The reinforcement auxiliary component includes a support plate fixedly connected to one side of the upper surface of the testing platform. A lifting plate is slidably connected to one side of the support plate, and two rigid tubes are slidably connected to one side of the lifting plate. Multiple air inlets are equidistantly arranged along the lower side of the rigid tubes, and suction cups are provided at the air inlets. Electrostatic generating rods are provided on both sides of the upper surface of the testing platform, and an electric heating plate is provided on one side of the outer wall of the rigid tubes.

[0020] Preferably, a bidirectional threaded rod is rotatably provided at both ends on one side of the lifting plate, and the two sides of the bidirectional threaded rod are respectively threaded to the ends of two rigid pipes. A motor is fixedly connected to one end of the lifting plate, and the output end of the motor is fixedly connected to one end of the bidirectional threaded rod.

[0021] Preferably, a cylinder is fixedly connected to one side of the support plate, the piston end of the cylinder is fixedly connected to one side of the bottom of the lifting plate, an air pump is fixedly connected to one side of the lifting plate, the air pump inlet is connected to a hose, and the two ends of the hose are respectively connected to two rigid pipes.

[0022] A rapid defect detection method for LED displays includes the following specific steps:

[0023] S1. First, place the LED display screen between two positioning plates, bringing the two positioning plates close together to clamp the LED display screen. Then, turn on the LED display screen. Next, turn on the detection camera and use the detection camera to take pictures of the LED display screen. Upload the pictures to the image analysis system. Adjust the position of the detection camera to expand the shooting range and ensure that all positions on the surface of the LED display screen are captured.

[0024] S2. When a defect is detected on the screen, the position of the slider can be adjusted so that the marker tip is aligned with the defect location. Then the marker is lowered so that the marker tip contacts the defect location on the screen, leaving a mark at the defect location. The above operation is repeated. Each time a defect is detected, it is marked with the marker.

[0025] S3. During the inspection process, the defect location can be recorded first. After a full inspection of an LED display screen is completed, the rack moves laterally on the support column. Since the film end is initially between the pressure roller and the support roller, and the pressure roller holds the film end in place under the action of the spring, when the rack moves laterally to the appropriate position, the edge of the film end is at the clamping end of the two finger cylinders. Then, the finger cylinders are used to clamp the film end, and then the finger cylinders are reset to the right. At the same time, the film is unwound until the unwound part of the film covers the top of the LED display screen. At this time, the marker pen is aligned with the defect location on the screen and driven to descend, so that a mark can be made on the film surface. After the marker pen has completed all the marks on the film surface, the blade rises and cuts one side of the film. The cut film will cover the LED display screen. Then, the LED display screen and the film are removed together and stored.

[0026] S4. The film can be wound up again by driving the roller to rotate, so that the broken end of the film is returned to the space between the pressure roller and the support roller for subsequent reuse.

[0027] S5. After the marker pen marks the film surface, the suction cup is attached to the film surface. The film is then adsorbed onto the suction cup by negative pressure. At this time, the finger cylinder can release the film, and the blade cuts the film. Then, the cut film is driven down again. At this time, the electrostatic generators on both sides are turned on to charge the film surface, which generates an adsorption force. After the film is attached to the LED display surface, the edge of the film will be adsorbed onto the screen frame. At this time, the suction cup is released to release the film. Then, the electric heating plate is energized and heated, and the electric heating plate is aligned with the screen frame. Then, both electric heating plates are brought close to the two sides of the screen frame at the same time until the electric heating plate presses down the edge of the film. The film will soften due to the heat and adhere more firmly to the frame, forming a firm bond between the film and the screen frame.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. The present invention discloses a rapid defect detection device and method for LED displays. Utilizing a marker-based visual inspection component, each detected defect is marked on the corresponding location on the screen with a marker pen. During subsequent repairs, maintenance personnel can determine the defect location by observing the markings. Furthermore, compared to recording fault locations using mobile phones, computers, or paper, this method eliminates the need for repeated searching and verification, thus improving the efficiency of batch repairs of LED displays.

[0030] 2. The LED display screen defect rapid detection device and method of the present invention utilizes a marking-assisted protective component. Before marking, a thin film is covered on the surface of the LED display screen, and then the film is marked with a marker pen, with each mark vertically corresponding to the location of the screen defect. The film is then cut, and the LED display screen and the film are removed and stored together. When repairing the LED display screen later, the location of the screen defect can be determined by observing the marks on the film. This makes it easier for maintenance personnel to find the location of the screen defect without leaving paint on the screen surface, thus saving the subsequent paint cleaning process, which is more convenient.

[0031] 3. The LED display screen defect rapid detection device and method of the present invention utilizes a reinforcement auxiliary component, which can achieve a firm adhesion between the film and the screen frame through electrostatic adsorption and by heat-softening the edge of the film and then hot-pressing it with the frame. This ensures that the film is not easily shifted or detached due to external force when the LED display screen is subsequently stored, thereby ensuring that the marking points are accurately aligned with the defect area and further improving maintenance efficiency. Attached Figure Description

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 This is a three-dimensional structural diagram of the lifting platform;

[0035] Figure 3 This is a schematic diagram of the three-dimensional structure of the rigid pipe.

[0036] Figure 4 This is a schematic diagram of the hidden three-dimensional structure of the detection platform of the present invention;

[0037] Figure 5 This is a schematic diagram of the three-dimensional structure at the transverse sliding plate.

[0038] Figure 6 This is a schematic diagram of the three-dimensional structure at the roller.

[0039] Figure 7 yes Figure 6 Enlarged view of a portion of point A in the middle;

[0040] Figure 8 This is a schematic diagram of a three-dimensional structure of a crossbeam.

[0041] In the diagram: 1. Testing table; 2. Crossbeam 1; 3. Support column; 4. Roller; 5. Crossbeam 2; 6. Support plate; 7. Cylinder 1; 8. Lifting plate; 9. Double-ended threaded rod 1; 10. Motor 1; 11. Air pump; 12. Rigid pipe; 13. Electric heating plate; 14. Positioning plate; 15. Motor 2; 16. Double-ended threaded rod 2; 17. Static electricity generator; 18. Blade; 19. Suction cup; 20. Motor 3; 21. Gear; 22. Rack; 23. Horizontal movement plate 24. Finger cylinder; 25. Membrane; 26. Motor 4; 27. Support rod; 28. Fixing frame; 29. ​​Threaded rod 1; 30. Motor 5; 31. Air inlet; 32. Threaded rod 2; 33. Motor 6; 34. Cylinder 2; 35. Guide rod 1; 36. Slider; 37. Detection camera; 38. Marker pen; 39. Pressure roller; 40. Support roller; 41. Sliding column; 42. Spring; 43. Cylinder 3; 44. Guide rod 2; 45. Hose. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please refer to Figures 1-8 The present invention provides a technical solution: a rapid defect detection device for LED display screens, including a detection table 1, on which a marker-type visual inspection component is provided;

[0044] The marking-type visual inspection component includes a crossbeam 1 2 fixedly connected to both sides of the upper surface of the inspection table 1, a crossbeam 2 5 slidably connected between the two crossbeams 1 2, a slider 36 slidably connected to one side of the crossbeam 2 5, two guide rods 1 35 slidably connected to the slider 36, an inspection camera 37 fixedly connected to the lower end of the guide rods 1 35, and a marker pen 38 provided on one side of the inspection camera 37.

[0045] It also includes marker-assisted protection components;

[0046] The marking auxiliary protection component includes a roller 4 rotatably mounted on one side of the upper surface of the detection table 1, with a film 25 wound on the roller 4. A fixing frame 28 is fixedly connected to one side of the upper surface of the detection table 1, and two guide rods 44 are slidably connected to the fixing frame 28. A blade 18 is fixedly connected to the upper end of the two guide rods 44. A support column 3 is fixedly connected to one side of the upper surface of the detection table 1, and a rack 22 is slidably connected to the upper end of the support column 3. A transverse plate 23 is fixedly connected to one end of the rack 22, and two finger cylinders 24 are fixedly connected to one side of the transverse plate 23.

[0047] In this embodiment, as Figure 2 , Figures 4-8 As shown, one end of the crossbeam 2 5 is threadedly connected to a threaded rod 29, both ends of which are rotatably mounted on the crossbeam 2 5. One end of the crossbeam 2 5 is fixedly connected to a motor 30, the output end of which is fixedly connected to one end of the threaded rod 29. One end of the slider 36 is threadedly connected to a threaded rod 32, both ends of which are rotatably mounted on the crossbeam 2 5. One side of the crossbeam 2 5 is fixedly connected to a motor 33, the output end of which is fixedly connected to one end of the threaded rod 32. One side of the slider 36 is fixedly connected to a cylinder 34, the piston end of which is fixedly connected to one side of the detection camera 37.

[0048] A motor 26 is fixedly connected to one side of the upper end of the testing table 1. The output end of the motor 26 is fixedly connected to one end of the roller 4. Two support rods 27 are fixedly connected to one side of the testing table 1. A sliding column 41 is fixedly connected to the upper end of the support rod 27. The two sliding columns 41 are slidably connected to the pressure roller 39. A support roller 40 is fixedly connected between the two support rods 27. A spring 42 is sleeved on one side of the sliding column 41. One end of the spring 42 is fixedly connected to one end of the pressure roller 39, and the other end is fixedly connected to the end of the sliding column 41.

[0049] A cylinder 43 is fixedly connected to one side of the mounting bracket 28, and the piston end of the cylinder 43 is fixedly connected to one side of the bottom of the blade 18.

[0050] A gear 21 is rotatably mounted on one side of the upper end of the support column 3. The gear 21 meshes with the rack 22. A motor 20 is fixedly connected to one side of the upper end of the support column 3. The output end of the motor 20 is fixedly connected to the gear 21.

[0051] It also includes a display positioning component;

[0052] The display screen positioning assembly includes two positioning plates 14, which are symmetrically slidably arranged on both sides of the upper end face of the testing table 1. A bidirectional threaded rod 16 is rotatably arranged on one side of the upper end face of the testing table 1. The two sides of the bidirectional threaded rod 16 are threadedly connected to the two positioning plates 14 respectively. A motor 15 is fixedly connected to one side of the upper end face of the testing table 1. The output end of the motor 15 is fixedly connected to one end of the bidirectional threaded rod 16.

[0053] Specifically, in existing technologies, when performing defect detection on an LED display screen, the LED display screen is first turned on, and then a CCD camera is used to take a picture of the LED display screen. The picture is then uploaded to an image analysis system to detect whether the screen has defects. Furthermore, when defects are detected on the screen, repairs are required.

[0054] However, LED displays are typically inspected in batches, and defective displays are repaired after the inspection. During the repair process, due to the large number of LED displays, repair personnel find it difficult to accurately remember the location of the defect for each one, thus affecting repair efficiency. Furthermore, even if the fault location is recorded using a mobile phone, computer, or paper, repeated searching and verification are necessary during repair, which is cumbersome and prone to confusion.

[0055] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0056] First, the LED display screen is placed between two positioning plates 14. Then, motor 2 15 drives the bidirectional threaded rod 2 16 to rotate, so that the two positioning plates 14 move closer together to clamp the LED display screen. Then, the LED display screen is lit up. Subsequently, the detection camera 37 is turned on to take pictures of the LED display screen and upload the pictures to the image analysis system. In addition, motor 5 30 drives the threaded rod 1 29 to rotate, so that the crossbeam 2 5 slides on the crossbeam 1 2. Motor 6 33 drives the threaded rod 2 32 to rotate, so that the slider 36 slides on the crossbeam 2 5. The position of the detection camera 37 can be adjusted to expand the shooting range and ensure that all positions on the surface of the LED display screen are captured.

[0057] When a defect is detected on the screen, the position of slider 36 can be adjusted to align the tip of marker pen 38 with the defect location. Then, cylinder 34 lowers the detection camera 37 and marker pen 38, bringing the marker pen tip into contact with the defect location on the screen, thus leaving a mark. This process is repeated; each time a defect is detected, it is marked with marker pen 38. During subsequent repairs, maintenance personnel can determine the defect location by observing these marks. Furthermore, compared to using mobile phones, computers, or paper to record fault locations, this method eliminates the need for repeated searching and verification, thus improving the efficiency of batch repairs of LED displays.

[0058] While the above method can mark the defect location, it leaves pigment on the screen surface. To ensure the screen's appearance quality, this pigment needs to be removed after repair, making the whole process quite troublesome. Therefore, to solve this problem, the defect location can be recorded during the inspection process. After a full inspection of an LED display screen is completed, motor 20 drives gear 21 to rotate, causing rack 22 to move laterally on support 3. Since the end of film 25 is initially positioned between pressure roller 39 and support roller 40, and pressure roller 39 holds the end of film 25 in place by spring 42. Therefore, when the rack 22 moves laterally to the appropriate position, the edge of the film 25 is clamped by the two finger cylinders 24. Then, the finger cylinders 24 clamp the end of the film 25 and then reset to the right. At the same time, the motor 4 26 drives the roller 4 to rotate and unwind the film 25 until the unwound part of the film 25 covers the top of the LED display screen. At this time, the marker 38 is aligned with the defect position of the screen and driven to descend, so that a mark can be made on the surface of the film 25. After the marker 38 has completed all the marks on the surface of the film 25, the cylinder 43 drives the blade 18 to rise, which can cut one side of the film 25. The cut film 25 will cover the LED display screen. Then, the LED display screen and the film 25 are removed and stored together. When repairing the LED display screen later, the position of the screen defect can be determined by observing the marks on the film 25. This makes it easier for maintenance personnel to find the position of the screen defect and avoids leaving paint on the screen surface, thus saving the subsequent process of cleaning the paint, which is more convenient.

[0059] Subsequently, the film 25 can be wound up again by driving the roller 4 to return the broken end of the film 25 to the space between the pressure roller 39 and the support roller 40 for later reuse.

[0060] In this embodiment, as Figure 2 and Figure 3 As shown, it also includes reinforcement auxiliary components;

[0061] The reinforcement auxiliary components include a support plate 6 fixedly connected to one side of the upper surface of the test platform 1, a lifting plate 8 slidably connected to one side of the support plate 6, two rigid pipes 12 slidably connected to one side of the lifting plate 8, multiple air inlets 31 are equidistantly arranged on the lower side of the rigid pipes 12 along the horizontal direction, and suction cups 19 are provided at the air inlets 31. Static electricity generating rods 17 are provided on both sides of the upper surface of the test platform 1, and an electric heating plate 13 is provided on one side of the outer wall of the rigid pipes 12.

[0062] The lifting plate 8 has a double-threaded rod 9 rotatably installed at both ends on one side. The two sides of the double-threaded rod 9 are respectively threaded to the ends of two rigid pipes 12. A motor 10 is fixedly connected to one end of the lifting plate 8, and the output end of the motor 10 is fixedly connected to one end of the double-threaded rod 9.

[0063] A cylinder 7 is fixedly connected to one side of the support plate 6. The piston end of the cylinder 7 is fixedly connected to one side of the bottom of the lifting plate 8. An air pump 11 is fixedly connected to one side of the lifting plate 8. The air inlet of the air pump 11 is connected to a hose 45. The two ends of the hose 45 are connected to the two rigid pipes 12 respectively.

[0064] Specifically, in the above embodiments, although the pigment can be prevented from directly contacting the screen by covering the surface of the LED display with a thin film 25, the thin film 25 is prone to shifting or even falling off due to external force during subsequent storage, which causes the marking points to no longer align with the defective area, thus affecting subsequent repair work.

[0065] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0066] After the marker 38 marks the surface of the film 25, the cylinder 7 lowers the lifting plate 8, causing the suction cup 19 to adhere to the surface of the film 25. Then, the air pump 11 is turned on, and the film 25 is adsorbed onto the suction cup 19 through negative pressure adsorption. At this time, the finger cylinder 24 can release the film 25, and the blade 18 cuts the film 25. Then, the cut film 25 is lowered again. At this time, the electrostatic generators 17 on both sides are turned on, which charges the surface of the film 25, generating an adsorption force on the surface of the film 25. After the film 25 is adhered to the surface of the LED display screen, the edge of the film 25 will adhere to the screen frame. At this point, the suction cup 19 releases the film 25. Then, the electric heating plate 13 is energized and heated, and aligned with the screen frame. The motor 10 drives the bidirectional threaded rod 9 to rotate, so that the two electric heating plates 13 simultaneously approach the two sides of the screen frame until the electric heating plates 13 press the edge of the film 25. The film 25 will soften due to heat and fit the frame better, thus forming a firm adhesion between the film 25 and the screen frame. When the LED display is stored later, the film 25 is not easy to shift or fall off due to external force, thereby ensuring that the marking points and defect areas are accurately aligned, further ensuring maintenance efficiency.

[0067] Furthermore, since the two rigid tubes 12 move laterally at the same time, when fixing the LED display screen, the distance between the two edges of the LED display screen and the two rigid tubes 12 can be the same, which can ensure that the two electric heating plates 13 contact the frame of the LED display screen at the same time.

[0068] A rapid defect detection method for LED displays includes the following specific steps:

[0069] S1. First, place the LED display screen between two positioning plates 14, so that the two positioning plates 14 are close to each other to clamp the LED display screen, then turn on the LED display screen, then turn on the detection camera 37, use the detection camera 37 to take pictures of the LED display screen, and upload the captured images to the image analysis system. In addition, adjust the position of the detection camera 37 to expand the shooting range and ensure that all positions on the surface of the LED display screen are captured.

[0070] S2. When a defect is detected on the screen, the position of the slider 36 can be adjusted so that the tip of the marker 38 is aligned with the defect location. Then the marker 38 is lowered so that the tip of the marker 38 contacts the defect location on the screen, thus leaving a mark at the defect location. The above operation is repeated. Whenever a defect is detected, the marker 38 is used to mark it.

[0071] S3. During the inspection process, the defect location can be recorded first. After a full inspection of an LED display screen is completed, the rack 22 is moved laterally on the support column 3. Since the end of the film 25 is initially located between the pressure roller 39 and the support roller 40, and the pressure roller 39 presses the end of the film 25 under the action of the spring 42, when the rack 22 moves laterally to the appropriate position, the edge of the end of the film 25 is located at the clamping end of the two finger cylinders 24. Then, the end of the film 25 is clamped by the finger cylinders 24. Subsequently, the finger cylinders 24 are reset to the right. At the same time, the film 25 is unwound until the unwound part of the film 25 covers the top of the LED display screen. At this time, the marker pen 38 is aligned with the defect location of the screen and driven to descend, so that a mark can be made on the surface of the film 25. After the marker pen 38 has completed all the marks on the surface of the film 25, the blade 18 rises and cuts off one side of the film 25. The cut film 25 will cover the LED display screen. Then, the LED display screen and the film 25 are removed together and stored.

[0072] S4. The film 25 can be wound up again by driving the roller 4 to return the broken end of the film 25 to the space between the pressure roller 39 and the support roller 40 for subsequent reuse.

[0073] S5. After the marker 38 marks the surface of the film 25, the suction cup 19 is attached to the surface of the film 25. The film 25 is adsorbed onto the suction cup 19 by negative pressure adsorption. At this time, the finger cylinder 24 can release the film 25, and the blade 18 cuts the film 25. Then, the cut film 25 is driven down again. At this time, the electrostatic generators 17 on both sides are turned on, so that the surface of the film 25 is charged, and the surface of the film 25 generates an adsorption force. When the film 25 is attached to the surface of the LED display screen, the edge of the film 25 will be adsorbed onto the screen frame. At this time, the suction cup 19 is released from the film 25. Then, the electric heating plate 13 is energized and heated, and the electric heating plate 13 is aligned with the screen frame. Then, the two electric heating plates 13 are brought close to the two sides of the screen frame at the same time until the electric heating plates 13 press the edge of the film 25. The film 25 will soften due to heat and adhere more to the frame. The film 25 and the screen frame are firmly attached.

[0074] Working principle: First, place the LED display screen between two positioning plates 14, so that the two positioning plates 14 are close to each other to clamp the LED display screen. Then, turn on the LED display screen. Then, turn on the detection camera 37 to take pictures of the LED display screen and upload the pictures to the image analysis system. In addition, adjust the position of the detection camera 37 to expand the shooting range and ensure that all positions on the surface of the LED display screen are captured.

[0075] When a defect is detected on the screen, the position of the slider 36 can be adjusted so that the tip of the marker 38 is aligned with the defect location. Then, the marker 38 is lowered so that the tip of the marker 38 contacts the defect location on the screen, thus leaving a mark at the defect location. The above operation is then repeated, and each time a defect is detected, it is marked with the marker 38. During the inspection process, the defect location is recorded first. After a full inspection of an LED display screen is completed, the rack 22 is moved laterally on the support column 3. Since the end of the film 25 is initially located between the pressure roller 39 and the support roller 40, and the pressure roller 39 presses down the end of the film 25 under the action of the spring 42, when the rack 22 moves laterally to the appropriate position, the edge of the end of the film 25 is located at the clamping end of the two finger cylinders 24. Then, the end of the film 25 is clamped by the finger cylinders 24. Subsequently, the finger cylinders 24 are reset to the right. At the same time, the film 25 is unwound until the unwound part of the film 25 covers the top of the LED display screen. At this time, the marker pen 38 is aligned with the defect location of the screen and driven to descend, so that a mark can be made on the surface of the film 25. After the marker pen 38 has completed all the marks on the surface of the film 25, the blade 18 rises and cuts off one side of the film 25. The cut film 25 will cover the LED display screen. Then, the LED display screen and the film 25 are removed together and stored.

[0076] The film 25 can be wound up again by driving the roller 4 to return the broken end of the film 25 to between the pressure roller 39 and the support roller 40 for subsequent use. After the marker 38 marks the surface of the film 25, the suction cup 19 is attached to the surface of the film 25, and the film 25 is adsorbed onto the suction cup 19 by negative pressure adsorption. At this time, the finger cylinder 24 can release the film 25, and the blade 18 cuts the film 25. Then, the cut film 25 is driven down again. At this time, the electrostatic generators 17 on both sides are turned on to make... When the surface of the film 25 is charged, an adsorption force is generated on the surface of the film 25. After the film 25 is attached to the surface of the LED display screen, the edge of the film 25 will be adsorbed on the screen frame. At this time, the suction cup 19 is released to release the film 25. Then, the electric heating plate 13 is energized and heated, and the electric heating plate 13 is aligned with the screen frame. Then, the two electric heating plates 13 are brought close to the two side frames of the screen at the same time until the electric heating plates 13 press the edge of the film 25. The film 25 will soften due to heat and adhere more to the frame. The film 25 and the screen frame are firmly attached.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid defect detection device for LED displays, comprising a detection table (1), characterized in that: The detection station (1) is equipped with a marker-type visual inspection component; The marking-type visual inspection component includes a crossbeam 1 (2) fixedly connected to both sides of the upper surface of the inspection table (1), a crossbeam 2 (5) slidably connected between the two crossbeams 1 (2), a slider (36) slidably connected to one side of the crossbeam 2 (5), two guide rods 1 (35) slidably connected to the slider (36), an inspection camera (37) fixedly connected to the lower end of the guide rods 1 (35), and a marker pen (38) provided on one side of the inspection camera (37). It also includes marker-assisted protection components; The marking auxiliary protection component includes a roller (4) rotatably mounted on one side of the upper end face of the detection table (1), a film (25) is wound on the roller (4), a fixed frame (28) is fixedly connected to one side of the upper end face of the detection table (1), two guide rods (44) are slidably connected to the fixed frame (28), and a blade (18) is fixedly connected to the upper ends of the two guide rods (44). A support column (3) is fixedly connected to one side of the upper end face of the detection table (1), a rack (22) is slidably connected to the upper end of the support column (3), a transverse plate (23) is fixedly connected to one end of the rack (22), and two finger cylinders (24) are fixedly connected to one side of the transverse plate (23).

2. The LED display screen defect rapid detection device according to claim 1, characterized in that: One end of the second crossbeam (5) is threadedly connected to a threaded rod (29), both ends of the threaded rod (29) are rotatably mounted on the first crossbeam (2). One end of the first crossbeam (2) is fixedly connected to a motor (30), the output end of the motor (30) is fixedly connected to one end of the threaded rod (29). One end of the slider (36) is threadedly connected to a threaded rod (32), both ends of the threaded rod (32) are rotatably mounted on the second crossbeam (5). One side of the second crossbeam (5) is fixedly connected to a motor (33), the output end of the motor (33) is fixedly connected to one end of the threaded rod (32). One side of the slider (36) is fixedly connected to a cylinder (34), the piston end of the cylinder (34) is fixedly connected to one side of the detection camera (37).

3. The LED display screen defect rapid detection device according to claim 1, characterized in that: A motor (26) is fixedly connected to one side of the upper end of the testing platform (1). The output end of the motor (26) is fixedly connected to one end of the roller (4). Two support rods (27) are fixedly connected to one side of the testing platform (1). A sliding column (41) is fixedly connected to the upper end of the support rod (27). The two sliding columns (41) are slidably connected to the pressure roller (39). A support roller (40) is fixedly connected between the two support rods (27). A spring (42) is sleeved on one side of the sliding column (41). One end of the spring (42) is fixedly connected to one end of the pressure roller (39), and the other end is fixedly connected to the end of the sliding column (41).

4. The LED display screen defect rapid detection device according to claim 1, characterized in that: A cylinder (43) is fixedly connected to one side of the fixed frame (28), and the piston end of the cylinder (43) is fixedly connected to one side of the bottom of the blade (18).

5. The LED display screen defect rapid detection device according to claim 1, characterized in that: A gear (21) is rotatably mounted on one side of the upper end of the support column (3). The gear (21) meshes with the rack (22). A motor (20) is fixedly connected to one side of the upper end of the support column (3). The output end of the motor (20) is fixedly connected to the gear (21).

6. The LED display screen defect rapid detection device according to claim 1, characterized in that: It also includes a display positioning component; The display screen positioning assembly includes two positioning plates (14). The two positioning plates (14) are symmetrically slidably arranged on both sides of the upper end face of the testing platform (1). A bidirectional threaded rod (16) is rotatably arranged on one side of the upper end face of the testing platform (1). The two sides of the bidirectional threaded rod (16) are threadedly connected to the two positioning plates (14) respectively. A motor (15) is fixedly connected to one side of the upper end face of the testing platform (1). The output end of the motor (15) is fixedly connected to one end of the bidirectional threaded rod (16).

7. The LED display screen defect rapid detection device according to claim 1, characterized in that: It also includes reinforcement auxiliary components; The reinforcement auxiliary component includes a support plate (6) fixedly connected to one side of the upper surface of the testing platform (1). A lifting plate (8) is slidably connected to one side of the support plate (6). Two rigid tubes (12) are slidably connected to one side of the lifting plate (8). Multiple air inlets (31) are equidistantly arranged on the lower side of the rigid tubes (12) along the horizontal direction. A suction cup (19) is provided at the air inlet (31). Static electricity generators (17) are provided on both sides of the upper surface of the testing platform (1). An electric heating plate (13) is provided on one side of the outer wall of the rigid tubes (12).

8. The LED display screen defect rapid detection device according to claim 7, characterized in that: The lifting plate (8) has a double-threaded rod (9) rotatably installed at both ends on one side. The two sides of the double-threaded rod (9) are threadedly connected to the ends of two hard pipes (12) respectively. The lifting plate (8) has a motor (10) fixedly connected to one end. The output end of the motor (10) is fixedly connected to one end of the double-threaded rod (9).

9. The LED display screen defect rapid detection device according to claim 7, characterized in that: A cylinder (7) is fixedly connected to one side of the support plate (6). The piston end of the cylinder (7) is fixedly connected to one side of the bottom of the lifting plate (8). An air pump (11) is fixedly connected to one side of the lifting plate (8). The air inlet of the air pump (11) is connected to a hose (45). The two ends of the hose (45) are connected to the two hard pipes (12) respectively.

10. A rapid defect detection method for LED displays, characterized in that, The detection is performed using the detection equipment described in any one of claims 1-9, comprising the following specific steps: S1. First, place the LED display screen between two positioning plates (14) so ​​that the two positioning plates (14) are close to each other to clamp the LED display screen. Then, turn on the LED display screen. Then, turn on the detection camera (37) and use the detection camera (37) to take pictures of the LED display screen. Upload the captured images to the image analysis system. Adjust the position of the detection camera (37) to expand the shooting range and ensure that each position on the surface of the LED display screen is captured. S2. When a defect is detected on the screen, the position of the slider (36) can be adjusted so that the tip of the marker (38) is aligned with the defect position. Then the marker (38) is lowered so that the tip of the marker (38) contacts the defect position on the screen, thus leaving a mark at the defect position. The above operation is repeated. Whenever a defect is detected, the marker (38) is used to mark it. S3. During the inspection process, the defect location can be recorded first. After a full inspection of an LED display screen is completed, the rack (22) is moved laterally on the support (3). Since the end of the film (25) is initially located between the pressure roller (39) and the support roller (40), and the pressure roller (39) presses the end of the film (25) under the action of the spring (42), when the rack (22) moves laterally to the appropriate position, the edge of the end of the film (25) is located at the clamping end of the two finger cylinders (24). Then, the end of the film (25) is clamped by the finger cylinders (24). The finger cylinder (24) is reset to the right. At the same time, the film (25) is unwound until the unwound part of the film (25) covers the top of the LED display screen. At this time, the marker (38) is aligned with the defect position of the screen and driven down. Markings can be made on the surface of the film (25). After the marker (38) has completed all the markings on the surface of the film (25), the blade (18) rises and cuts off one side of the film (25). The cut film (25) will cover the LED display screen. Then the LED display screen and the film (25) are removed and stored together. S4. The film (25) can be wound up again by driving the roller (4) to return the broken end of the film (25) to the space between the pressure roller (39) and the support roller (40) for subsequent use. S5. After the marker (38) marks the surface of the film (25), the suction cup (19) is made to adhere to the surface of the film (25). The film (25) is adsorbed onto the suction cup (19) by negative pressure adsorption. At this time, the finger cylinder (24) can release the film (25), and the blade (18) cuts the film (25). Then, the cut film (25) is driven down again. At this time, the electrostatic generators (17) on both sides are turned on, so that the surface of the film (25) is charged, and an adsorption force is generated on the surface of the film (25). After the film (25) is attached to the surface of the LED display screen, the edge of the film (25) will be adsorbed onto the screen frame. At this time, the suction cup (19) is used to release the film (25). Then, the electric heating plate (13) is powered on and heated, and the electric heating plate (13) is aligned with the screen frame. Then, the two electric heating plates (13) are brought close to the two sides of the screen frame at the same time until the electric heating plate (13) presses the edge of the film (25). The film (25) will soften due to heat and fit the frame better. The film (25) and the screen frame are firmly attached.

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