An OLED screen AOI inspection device and its application in OLED production

Abstract

This invention relates to the field of OLED screen production technology, specifically to an OLED screen AOI inspection device and its application in OLED production. The OLED screen AOI inspection device includes a first conveyor line and a second conveyor line arranged side by side, and multiple cameras installed on the first conveyor line. It also includes a transverse shifter, movably positioned above the first and second conveyor lines. The transverse shifter can move along a conveying direction perpendicular to the screen, and multiple suction cups, each connected to a set of negative pressure suction mechanisms, are movably installed below the transverse shifter. The multiple suction cups can perform expansion or closure actions. This feature allows the device to easily adapt to screens of different specifications without the need to change different suction devices or make complex adjustments. By setting multiple circumferentially distributed and gradually increasing diameter through holes in the pipeline, and using the rotation of the kit to achieve a gradual pressure relief function, it shows significant advantages in terms of safety, stability, and applicability compared to instantaneous pressure relief methods.

Description

Technical Field

[0001] This invention relates to the field of OLED screen production technology, specifically to an OLED screen AOI inspection device and its application in OLED production. Background Technology

[0002] OLED screens are an advanced display technology. They are composed of layers of organic materials that emit light themselves when an electric current passes through them, eliminating the need for a backlight and allowing for thinner and lighter screens. OLED screens boast excellent contrast, as black pixels remain completely black, resulting in pure blacks, and their color reproduction is extremely vibrant and vivid. Their fast response time effectively reduces motion blur, providing excellent support for displaying fast-moving images.

[0003] In OLED screen production, AOI (Automated Optical Inspection) is an essential step. Its purpose is to detect defects such as pixel anomalies, bright spots, dark spots, and murmurs as early as possible, promptly rejecting unqualified products and reducing production costs. Simultaneously, the analysis of inspection data provides a basis for optimizing production processes and sorting out defective screens.

[0004] When sorting out defective screens, appropriate transfer devices are needed. To avoid scratching the screens, negative pressure suction is usually used, which uses the negative pressure suction principle of suction cups to lift and transfer the screens. However, single-point suction can easily lead to excessive local suction force on the screen, causing damage. Alternatively, multi-point suction can be used, but the distribution of suction cups is fixed and difficult to adapt to different screen sizes. Different suction devices or complex adjustments are often required depending on the screen, which is insufficient in terms of applicability.

[0005] In addition, existing negative pressure suction devices typically activate the pressure relief valve instantaneously when releasing the screen. While this method offers advantages such as fast response and high efficiency, the rapid pressure change can cause significant impact on the screen or suction cup due to the instantaneous pressure relief. This makes it difficult to avoid the risks associated with sudden pressure changes caused by instantaneous pressure relief, resulting in deficiencies in safety and stability. Summary of the Invention

[0006] The purpose of this invention is to provide an OLED screen AOI inspection device and its application in OLED production, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An OLED screen AOI inspection device includes a first conveyor line and a second conveyor line arranged side by side, and a plurality of cameras disposed on the first conveyor line, and further includes:

[0009] A transverse shifter is movably disposed above the first conveyor line and the second conveyor line. The transverse shifter can move along a conveying direction perpendicular to the screen, and multiple suction cups are movably disposed below the transverse shifter. The multiple suction cups can be driven by an opening and closing drive mechanism to perform an expansion or closing action.

[0010] When a screen detected as defective by the camera arrives on the second conveyor line, the stabilizing mechanism can perform a pressing action on the screen and cause the negative pressure suction mechanism to release the negative pressure state.

[0011] As a further aspect of the present invention: two cylinders are installed on the transverse shift seat, a disc is fixed to the movable end of the cylinder, and an assembly frame arranged in a cross shape is fixed below the disc through multiple connecting arms, and the opening and closing drive mechanism is installed on the disc.

[0012] As a further embodiment of the present invention: the opening and closing driving mechanism includes a plurality of movable seats slidably disposed on the assembly frame, the plurality of movable seats being equidistantly distributed along the circumference and connected to a threaded driving assembly disposed between the disc and the assembly frame, and the negative pressure suction mechanism being disposed on the movable seats.

[0013] As a further embodiment of the present invention: the threaded drive assembly includes a lead screw rotatably mounted between the disc and the assembly frame, and a threaded sleeve sleeved on the lead screw and threadedly connected to the lead screw. The threaded sleeve is connected to a plurality of movable seats through a plurality of first connecting rods. The two ends of the first connecting rods are respectively hinged to the threaded sleeve and the movable seats, and the lead screw can be driven to rotate by a drive motor mounted on the disc.

[0014] As a further embodiment of the present invention: the suction cup is connected to a negative pressure suction mechanism, the negative pressure suction mechanism includes a negative pressure pump and a pipeline provided on the negative pressure pump, and the suction cup is installed at the end of the pipeline away from the negative pressure pump.

[0015] As a further embodiment of the present invention: the pipeline is provided with a plurality of through holes, the plurality of through holes being distributed circumferentially and having gradually increasing diameters, and a kit is rotatably and sealed on the pipeline, the kit having a through hole, the diameter of the through hole being larger than the diameter of the through hole.

[0016] As a further embodiment of the present invention: a first plate is fixed to the side of the movable seat, and a second plate is fixed to the lower part of the first plate, both the first plate and the second plate being hollow inside;

[0017] The kit is connected to the stabilizing mechanism via a transmission mechanism. The transmission mechanism includes a transmission shaft rotatably mounted in the second plate and connected to the kit via a transmission belt. A second slider is also slidably connected to the transmission shaft in the second plate. The second slider is connected to the stabilizing mechanism.

[0018] The second slider is fixed with a protruding post, and the outer wall of the transmission shaft is provided with a groove adapted to the protruding post. The protruding post extends into the groove and is slidably connected to the transmission shaft. The groove includes a first groove and a second groove connected together. The first groove is arranged along the axial direction of the transmission shaft, and the second groove is arranged in a spiral shape.

[0019] As a further embodiment of the present invention: the stabilizing mechanism includes a first slider slidably disposed within the first plate and an elastic telescopic member connecting the second slider and the first slider, wherein the first slider can be driven by a threaded drive member disposed in the first plate to slide closer to or further away from the movable seat.

[0020] As a further embodiment of the present invention: the elastic telescopic member includes a guide cylinder fixedly connected to the second slider and a telescopic rod slidably fitted with the guide cylinder, and a second connecting rod is provided between the guide cylinder and the first slider, with the two ends of the second connecting rod respectively hinged to the first slider and the guide cylinder;

[0021] The guide cylinder is also equipped with a cylindrical spring, the two ends of which are respectively connected to the inner wall of the guide cylinder and the head of the telescopic rod, and the tail end of the telescopic rod is fixed with a pressing head.

[0022] An application of the aforementioned OLED screen AOI inspection equipment in OLED production employs the OLED screen AOI inspection equipment described above.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] This application achieves multi-point adsorption of the screen by setting multiple suction cups. Compared with the traditional single-point adsorption method, multi-point adsorption can significantly enhance the adsorption stability of the screen surface. Multiple suction cups can perform expansion or closing actions. This feature allows the device to easily adapt to screens of different sizes without the need to replace different adsorption devices or make complex adjustments.

[0025] The gradual pressure relief function of this application has significant advantages in terms of safety. Since the negative pressure value decreases slowly, the screen will not suddenly fall off due to the loss of adhesion, effectively avoiding the risk of the screen falling or colliding due to sudden pressure relief. In terms of stability, gradual pressure relief can ensure that the screen remains stable throughout the release process.

[0026] In terms of applicability, the gradual pressure relief design of this application can adapt to different types of screens and different working scenarios. Whether for thinner and lighter screens or thicker and heavier screens, a gradually stable pressure relief effect can be achieved by gradually adjusting the conductivity of the through holes. Attached Figure Description

[0027] Figure 1 An isometric view of one embodiment of an OLED screen AOI inspection device.

[0028] Figure 2 This is a schematic diagram of one embodiment of an OLED screen AOI inspection device.

[0029] Figure 3 This is a structural schematic diagram from another angle of one embodiment of an OLED screen AOI inspection device.

[0030] Figure 4 This is a structural schematic diagram from another angle of one embodiment of an OLED screen AOI inspection device.

[0031] Figure 5 for Figure 3 Enlarged view of the structure at point A in the middle.

[0032] Figure 6 for Figure 4 Enlarged view of the structure at point B in the middle.

[0033] Figure 7 This is a schematic diagram showing the distribution of multiple suction cups in one embodiment of an OLED screen AOI inspection device.

[0034] Figure 8 for Figure 7 A structural diagram from another angle.

[0035] Figure 9 This is a schematic diagram of the opening and closing drive rod mechanism in one embodiment of an OLED screen AOI inspection device.

[0036] Figure 10 This is an exploded view of the stabilizing mechanism in one embodiment of an OLED screen AOI inspection device.

[0037] Figure 11 for Figure 10 A structural diagram from another angle.

[0038] In the diagram: 1. First conveyor line; 2. Second conveyor line; 3. Frame; 4. Transverse seat; 5. Cylinder; 6. Disc; 7. Connecting arm; 8. Assembly frame; 9. Drive motor; 10. Lead screw; 11. Threaded sleeve; 12. First connecting rod; 13. Movable seat; 14. First plate; 15. Second plate; 16. Negative pressure pump; 17. Pipeline; 1701. Through hole; 18. Suction cup; 19. First slider; 20. Second connecting rod; 21. Second slider; 2101. Protruding post; 22. Drive shaft; 2201. First groove; 2202. Second groove; 23. Kit; 2301. Through hole; 24. Drive belt; 25. Cylindrical spring; 26. Guide cylinder; 27. Telescopic rod; 28. Camera. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0040] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0041] Please see Figures 1-11 In this embodiment of the invention, an OLED screen AOI inspection device includes a first conveyor line 1 and a second conveyor line 2 arranged side by side, and a plurality of cameras 28 mounted on the first conveyor line 1. The cameras 28 are high-definition industrial cameras. The processing system for AOI inspection of the screen using these high-definition industrial cameras mainly consists of an optical imaging unit, an image acquisition and transmission unit, a data processing unit, a software analysis system, and an output and feedback mechanism. The optical imaging unit includes a high-definition industrial camera, a lens, and a light source, responsible for acquiring high-definition images of the screen. The image acquisition and transmission unit rapidly transmits image data to the data processing unit, typically based on high-performance computing hardware such as a GPU or FPGA, to achieve real-time processing. The software analysis system performs preprocessing, feature extraction and matching, and defect identification on the images using preset algorithms. Finally, the system outputs the inspection results and can be linked with production equipment to achieve real-time feedback and automatic adjustment.

[0042] The OLED screen AOI inspection equipment also includes:

[0043] The transverse shift seat 4 is movably disposed above the first conveyor line 1 and the second conveyor line 2. The transverse shift seat 4 can move along the conveying direction perpendicular to the screen. A plurality of suction cups 18, each connected to a set of negative pressure suction mechanisms, are movably disposed below the transverse shift seat 4. The plurality of suction cups 18 can be driven by the opening and closing drive mechanism to perform expansion or closing actions.

[0044] When a screen detected as defective by the camera 28 arrives on the second conveyor line 2, the stabilizing mechanism can perform a pressing action on the screen and cause the negative pressure suction mechanism to release the negative pressure state.

[0045] Furthermore, the camera 28 performs AOI (Automated Optical Inspection) on the OLED screen. Once the defective screen accurately reaches the area beneath the multiple suction cups 18, these suction cups 18 play a crucial role. They work together, using appropriate suction force to steadily lift the defective screen. This process not only avoids secondary damage that may be caused by manual operation but also greatly improves the efficiency and accuracy of sorting. Subsequently, the suction cups 18 will quickly and smoothly transfer the defective screen to the second conveyor line 2 according to a preset path, thereby achieving efficient and accurate sorting of defective products.

[0046] To elaborate, the aforementioned preset path is achieved through a frame 3 installed on the first conveyor line 1 and the second conveyor line 2. The frame 3 includes two side plates fixed to the outside of the first conveyor line 1 and the second conveyor line 2, and two guide rods fixed between the two side plates. The transverse shift seat 4 is slidably mounted on the two guide rods and can be driven by an external hydraulic cylinder to slide along the axial direction of the guide rods. This enables the switching of multiple suction cups 18 above the first conveyor line 1 and the second conveyor line 2. In other words, the suction cups 18 can drive unqualified OLED screens to move along the preset path for sorting.

[0047] Please refer to it again. Figure 5 Two cylinders 5 are installed on the transverse seat 4. A disc 6 is fixed to the movable end of the cylinder 5. An assembly frame 8 arranged in a cross shape is fixed below the disc 6 through multiple connecting arms 7. The opening and closing drive mechanism is installed on the disc 6.

[0048] Specifically, two cylinders 5 are mounted on the transverse support 4, providing stable and sufficient power support for subsequent operations. A disc 6 is fixed to the movable end of each cylinder 5. Driven by the cylinders 5, the disc 6 can achieve a corresponding movement trajectory, allowing the suction cups 18 to move downwards to contact the screen surface and place the screen on the second conveyor line 2 during screen suction and release. Furthermore, an assembly frame 8 arranged in a cross shape is fixed below the disc 6 via multiple connecting arms 7. This unique layout allows the assembly frame 8 to have better stability and balance in space. In addition, the opening and closing drive mechanism is mounted on the disc 6, precisely controlling the opening and closing movements of the multiple suction cups 18 on the assembly frame 8.

[0049] Please refer to it again. Figure 5 and Figure 6 The opening and closing drive mechanism includes multiple movable seats 13 slidably disposed on the assembly frame 8. The multiple movable seats 13 are equidistantly distributed along the circumference and connected to a threaded drive assembly disposed between the disc 6 and the assembly frame 8. The negative pressure suction mechanism is disposed on the movable seats 13. The threaded drive assembly includes a lead screw 10 rotatably mounted between the disc 6 and the assembly frame 8 and a threaded sleeve 11 sleeved on and threadedly connected to the lead screw 10. The threaded sleeve 11 is connected to the multiple movable seats 13 respectively through multiple first connecting rods 12. The two ends of the first connecting rods 12 are respectively hinged to the threaded sleeve 11 and the movable seats 13, and the lead screw 10 can be driven to rotate by a drive motor 9 mounted on the disc 6.

[0050] Furthermore, the drive motor 9 is a servo motor with bidirectional output. During operation, the drive motor 9 drives the lead screw 10 to rotate in the forward or reverse direction, so that the threaded sleeve 11 engages with the lead screw 10 in a threaded engagement and rises or falls.

[0051] When the threaded sleeve 11 descends, it pushes the movable seat 13 to slide away from the lead screw 10 on the assembly frame 8 via the first connecting rod 12. As a result, the multiple suction cups 18 can perform an expansion action. Conversely, when the threaded sleeve 11 rises, it pulls the movable seat 13 to slide closer to the lead screw 10 on the assembly frame 8 via the first connecting rod 12. This causes the multiple suction cups 18 to perform a closing action. Furthermore, through the precision and stability of the threaded engagement drive, the synchronous adjustment of the positions of the multiple suction cups 18 is achieved. In actual inspection and sorting, the coverage area of ​​the multiple suction cups 18 can be adjusted according to the actual size of the screen being inspected.

[0052] In summary, this application achieves multi-point adsorption of the screen by setting multiple suction cups 18. Compared with the traditional single-point adsorption method, multi-point adsorption can significantly enhance the adsorption stability of the screen surface, ensuring that the screen remains stable during the detection and sorting process. This effectively reduces detection errors or sorting mistakes caused by screen shaking or displacement. At the same time, multi-point adsorption can also ensure that the adsorption force on the screen surface is evenly distributed, avoiding problems such as screen falling off due to insufficient local adsorption force or indentation or damage to the screen surface due to excessive local adsorption force. This effectively protects the integrity and appearance quality of the screen.

[0053] In addition, the multiple suction cups 18 can perform expansion or closure actions. This feature allows the equipment to easily adapt to screens of different sizes without the need to change different suction devices or make complex adjustments, which greatly improves work efficiency, reduces production costs, and provides a more convenient, efficient and reliable solution for screen inspection and sorting.

[0054] Please refer to it again. Figure 10 and Figure 11 The negative pressure suction mechanism includes a negative pressure pump 16 mounted on the movable seat 13 and a pipe 17 provided on the negative pressure pump 16. The suction cup 18 is mounted on the end of the pipe 17 away from the negative pressure pump 16. The pipe 17 is provided with a plurality of through holes 1701, which are distributed circumferentially and gradually increase in diameter. A kit 23 is rotatably and sealed on the pipe 17. The kit 23 is provided with a through hole 2301, the diameter of which is larger than the diameter of the through hole 1701. The kit 23 is connected to the stabilizing mechanism through a transmission mechanism.

[0055] Specifically, when the screen is adsorbed, the through hole 2301 is staggered from the multiple through holes 1701. At this time, the kit 23 blocks the multiple through holes 1701. When the defective screen arrives on the second conveyor line 2, the stabilizing mechanism starts to work and applies a small pressure to the screen. Correspondingly, the transmission mechanism drives the kit 23 to rotate. Then, the through hole 2301 will be aligned with the multiple through holes 1701 one by one (from small to large). Therefore, the contact process of the negative pressure state in the suction cup 18 is gradually depressurized to release the adsorption state of the suction cup 18 on the screen. At the same time, under the action of the stabilizing mechanism, it is conducive to the smooth detachment of the suction cup 18 from the screen.

[0056] In summary, compared with traditional instantaneous pressure relief methods, the gradual pressure relief function of this application shows significant advantages in terms of safety. Since the negative pressure value decreases slowly, the screen will not suddenly fall off due to the instantaneous loss of adhesion, effectively avoiding the risks of dropping or collision caused by instantaneous pressure relief. Especially for some high-precision and high-value screens, this feature can provide more reliable protection, reduce economic losses caused by accidental damage, and also help protect the personal safety of operators and avoid accidental injuries that may be caused by the sudden fall of the screen.

[0057] In terms of stability, gradual pressure release ensures that the screen remains stable throughout the release process. Because the reduction of negative pressure is a gradual process, the screen will not shake or vibrate due to sudden changes in pressure, which is crucial for some high-precision inspection and sorting processes.

[0058] In terms of applicability, the gradual pressure relief design of this application can adapt to different types of screens and different working scenarios. Whether for thinner, lighter screens or thicker, heavier screens, a gradual and stable pressure relief effect can be achieved by gradually adjusting the conductivity of the through-hole 1701. Furthermore, for screens made of special materials or that are fragile, the gradual pressure relief function provides a gentler release method, avoiding damage to the screen surface caused by instantaneous pressure relief. This expands the applicability of the device, enhances its versatility and flexibility, meets the diverse production needs of enterprises, and helps improve their competitiveness and adaptability in the market.

[0059] In summary, this application, by setting multiple circumferentially distributed and gradually increasing diameter through holes 1701 on the pipeline 17 and utilizing the rotation of the kit 23 to achieve a gradual pressure relief function, demonstrates significant advantages in terms of safety, stability, and applicability compared to the instantaneous pressure relief method. It effectively reduces the risk of pressure surges caused by instantaneous pressure relief, providing a more reliable, efficient, and stable solution for screen detection and sorting.

[0060] Please refer to it again. Figure 10 and Figure 11 The movable seat 13 has a first plate 14 fixed to its side, and a second plate 15 fixed to its lower part. Both the first plate 14 and the second plate 15 are hollow. The transmission mechanism includes a transmission shaft 22 rotatably mounted in the second plate 15 and connected to the kit 23 via a transmission belt 24. A second slider 21 is also slidably disposed in the second plate 15 and slidably connected to the transmission shaft 22. The second slider 21 is connected to the stabilizing mechanism.

[0061] The second slider 21 is fixed with a protrusion 2101, and the outer wall of the transmission shaft 22 is provided with a groove adapted to the protrusion 2101. The protrusion 2101 extends into the groove and is slidably connected to the transmission shaft 22. The groove includes a first groove 2201 and a second groove 2202 connected to each other. The first groove 2201 is arranged along the axial direction of the transmission shaft 22, and the second groove 2202 is arranged in a spiral shape.

[0062] The stabilizing mechanism includes a first slider 19 slidably disposed within the first plate 14 and an elastic telescopic member connecting the second slider 21 and the first slider 19. The first slider 19 can be driven by a threaded drive member disposed in the first plate 14 to slide closer to or further away from the movable seat 13.

[0063] Specifically, the threaded drive component adopts a threaded engagement drive method to adjust the position of the movable seat 13 in the first plate 14. It includes a drive rod rotatably installed in the first plate 14. The drive rod passes through the first slider 19 and is threadedly connected to the first slider 19. In addition, a drive motor is provided at the end of the first plate 14 away from the movable seat 13.

[0064] The elastic telescopic component includes a guide cylinder 26 fixedly connected to the second slider 21 and a telescopic rod 27 slidably fitted with the guide cylinder 26. A second connecting rod 20 is provided between the guide cylinder 26 and the first slider 19. The two ends of the second connecting rod 20 are respectively hinged to the first slider 19 and the guide cylinder 26.

[0065] The guide cylinder 26 is also provided with a cylindrical spring 25. The two ends of the cylindrical spring 25 are respectively connected to the inner wall of the guide cylinder 26 and the first end of the telescopic rod 27. The tail end of the telescopic rod 27 is fixed with a pressing head.

[0066] When the screen needs to be released onto the second conveyor line 2, the threaded drive causes the first slider 19 to slide towards the movable seat 13 within the first plate 14. The first slider 19 then pushes the guide cylinder 26 downwards via the second connecting rod 20 (simultaneously, the second slider 21 moves downwards along with the guide cylinder 26, and the protrusion 2101 moves axially along the drive shaft 22). Consequently, the pressing head contacts the screen, and with the compression of the cylindrical spring 25, the pressing head applies pressure to the screen. (It should be noted that the cylindrical spring 25 has a low elastic coefficient; this design feature makes the pressure change slow and gentle when the pressing head applies pressure to the screen, avoiding...) To prevent damage to the screen due to excessive pressure or rapid changes, this design effectively ensures the integrity of the screen, especially suitable for some fragile or high-precision screens, reducing production risks and costs for enterprises. This facilitates the smooth detachment of the suction cup 18 from the screen. Before the pressing head contacts the screen, the protrusion 2101 slides in the first groove 2201, and the drive shaft 22 does not rotate. During the compression of the columnar spring 25, the protrusion 2101 slides in the second groove 2202, causing the drive shaft 22 to drive the kit 23 to rotate through the drive belt 24, so that the multiple through holes 1701 can be opened one by one to gradually and stably release the negative pressure state inside the suction cup 18.

[0067] As another embodiment of the present invention, an application of the OLED screen AOI inspection equipment in OLED production is also proposed, which adopts the OLED screen AOI inspection equipment of the above embodiment.

[0068] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0069] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An OLED screen AOI inspection device, comprising a first conveyor line and a second conveyor line arranged side by side, and a plurality of cameras disposed on the first conveyor line; Its features are, Also includes: A transverse shifter is movably disposed above the first conveyor line and the second conveyor line. The transverse shifter can move along the conveying direction perpendicular to the screen. A plurality of suction cups, each connected to a set of negative pressure suction mechanisms, are movably disposed below the transverse shifter. The plurality of suction cups can be driven by an opening and closing drive mechanism to perform an expansion or closing action. The opening and closing drive mechanism includes a plurality of movable seats. When a screen detected as defective by the camera arrives on the second conveyor line, the stabilizing mechanism can perform a pressing action on the screen and cause the negative pressure suction mechanism to release the negative pressure state. A first plate is fixed to the side of the movable seat, and a second plate is fixed to the lower part of the first plate. Both the first plate and the second plate are hollow. The negative pressure suction mechanism includes a negative pressure pump and a pipeline provided on the negative pressure pump, and the suction cup is installed at the end of the pipeline away from the negative pressure pump; The pipeline is provided with multiple through holes, which are distributed circumferentially and gradually increase in diameter. A kit is rotatably and sealed on the pipeline, and the kit is provided with a through hole, the diameter of which is larger than the diameter of the through hole. The kit is connected to the stabilizing mechanism via a transmission mechanism. The transmission mechanism includes a transmission shaft rotatably mounted in the second plate and connected to the kit via a transmission belt. A second slider is also slidably connected to the transmission shaft in the second plate. The second slider is connected to the stabilizing mechanism. The second slider is fixed with a protruding post, and the outer wall of the transmission shaft is provided with a groove adapted to the protruding post. The protruding post extends into the groove and is slidably connected to the transmission shaft. The groove includes a first groove and a second groove connected together. The first groove is arranged along the axial direction of the transmission shaft, and the second groove is arranged in a spiral shape.

2. The OLED screen AOI inspection equipment according to claim 1, characterized in that, Two cylinders are mounted on the transverse shift seat. A disc is fixed to the movable end of the cylinder. An assembly frame arranged in a cross shape is fixed below the disc through multiple connecting arms. The opening and closing drive mechanism is mounted on the disc.

3. The OLED screen AOI inspection equipment according to claim 2, characterized in that, The movable seat is slidably disposed on the assembly frame. Multiple movable seats are distributed equidistantly along the circumference and are connected to a threaded drive assembly disposed between the disc and the assembly frame. The negative pressure suction mechanism is disposed on the movable seat.

4. The OLED screen AOI inspection equipment according to claim 3, characterized in that, The threaded drive assembly includes a lead screw rotatably mounted between the disc and the assembly frame, and a threaded sleeve sleeved on the lead screw and threadedly connected to the lead screw. The threaded sleeve is connected to multiple movable seats through multiple first connecting rods. The two ends of the first connecting rods are respectively hinged to the threaded sleeve and the movable seats, and the lead screw can be driven to rotate by a drive motor mounted on the disc.

5. The OLED screen AOI inspection equipment according to claim 1, characterized in that, The stabilizing mechanism includes a first slider slidably disposed within the first plate and an elastic telescopic member connecting the second slider and the first slider. The first slider can be driven by a threaded drive member disposed in the first plate to slide closer to or further away from the movable seat.

6. The OLED screen AOI inspection equipment according to claim 5, characterized in that, The elastic telescopic component includes a guide cylinder fixedly connected to the second slider and a telescopic rod slidably fitted with the guide cylinder. A second connecting rod is provided between the guide cylinder and the first slider, and the two ends of the second connecting rod are respectively hinged to the first slider and the guide cylinder. The guide cylinder is also equipped with a cylindrical spring, the two ends of which are respectively connected to the inner wall of the guide cylinder and the head of the telescopic rod, and the tail end of the telescopic rod is fixed with a pressing head.

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