Polarization visual detection device and method for tiny point pollution defect of OLED (Organic Light Emitting Diode) display screen

Abstract

The invention relates to the technical field of OLED display screen detection, in particular to an OLED display screen tiny point pollution defect polarized light visual detection device and method.The OLED display screen tiny point pollution defect polarized light visual detection device comprises a detection cabinet, a transverse table arranged in the detection cabinet and a camera installed on the top wall of the detection cabinet and further comprises a frame movably arranged in the detection cabinet and two movable seats symmetrically arranged in the frame in a sliding mode; the frame body can move in the length direction of the transverse table, two vertical plates are movably arranged on the movable seat, a rotating shaft is rotationally installed between the two vertical plates, an assembling frame is fixed to the rotating shaft, and an electrostatic adsorption plate is arranged in the assembling frame; by means of the two small electrostatic adsorption plates, through lifting, translation and deflection of the two small electrostatic adsorption plates, dust on the surface of a screen can be comprehensively removed, and the problem that the adsorption effect is poor due to the fact that a plate with the same area as the screen is adopted for adsorbing dust and the voltage and electric field intensity are difficult to control is solved; and an effective guarantee is provided for the accuracy of subsequent detection.

Description

Technical Field

[0001] This invention relates to the field of OLED display inspection technology, specifically to a polarized visual inspection device and method for micro-dot contamination defects in OLED displays. Background Technology

[0002] OLED displays, as a novel display technology, have been widely used in numerous fields due to their superior display effects and unique performance advantages. During the manufacturing process of OLED displays, minor contamination defects may appear on their surface. Although these defects are small, they can significantly impact the actual performance of the OLED display, such as reducing display quality and shortening its lifespan. The causes of these minor defects are mainly related to various factors in the production process, such as insufficient purity of raw materials, inadequate cleanliness of production equipment, dust contamination in the production environment, and improper operation during production.

[0003] To ensure the quality of OLED displays, prevent defective products from entering the market, and facilitate improvements in production processes, rigorous defect detection of the OLED display surface is typically required during manufacturing. Currently, visual inspection is one of the commonly used methods. This involves capturing images of the display surface using a camera, and then analyzing these images using a computer to determine the presence of defects. However, in actual inspection, if dust is present on the display surface, the computer may misidentify removable dust as defects, leading to inaccurate results. To address this issue, some existing inspection equipment incorporates dust removal mechanisms to clean the display surface before inspection. However, traditional contact wiping methods have drawbacks. Dust accumulates on the wiping components, and the friction between the dust and the display surface can easily cause scratches, creating new defects. Therefore, electrostatic adsorption, a non-contact dust removal method, has become a better choice.

[0004] However, for large screens, using an electrostatic adsorption plate of the same size for dust removal presents significant challenges in controlling voltage and electric field strength. The electric field distribution may become uneven, leading to poor adsorption performance. Conversely, using a smaller electrostatic adsorption plate can result in reduced adsorption capacity in areas with higher dust levels, causing missed areas and ultimately hindering accurate testing. Summary of the Invention

[0005] The purpose of this invention is to provide a polarized visual inspection device and method for detecting minute contamination defects in OLED displays, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A polarized visual inspection device for micro-contamination defects in OLED displays includes an inspection cabinet, a horizontal platform inside the inspection cabinet, and a camera mounted on the top wall of the inspection cabinet. It also includes: The frame is movable inside the testing cabinet and two movable seats are symmetrically slidably installed inside the frame. The frame can move along the length of the horizontal platform. Two vertical plates are movably installed on the movable seats. A rotating shaft is rotatably installed between the two vertical plates. An assembly frame is fixed on the rotating shaft. An electrostatic adsorption plate is provided in the assembly frame. The vertical plate can be driven by a power mechanism on the frame to slide relative to the movable seat, so that the electrostatic adsorption plate can move closer to or away from the screen on the horizontal platform. The two movable seats can be driven away from the movable seats by opposing drive mechanisms on the frame, so that the two docked electrostatic adsorption plates can be separated. The rotating shaft is also connected to two sets of elastic mechanisms. The elastic mechanisms are triggered after the two electrostatic adsorption plates are separated, driving the assembly frame to move the electrostatic adsorption plates to perform a swaying action so that the dust-collecting surface of the electrostatic adsorption plates is away from the horizontal platform. The collection mechanism on the frame transfers the dust on the electrostatic adsorption plates.

[0007] As a further aspect of the present invention: the assembly frame is arranged in a U-shape, and its inner wall is provided with an assembly groove adapted to the electrostatic adsorption plate. A power supply module is also provided on the side of the assembly frame away from the electrostatic adsorption plate. When the collection mechanism is working, the power supply module switches the power-on state of the electrostatic adsorption plate to the power-off state.

[0008] As a further embodiment of the present invention: the power mechanism includes a pneumatic lifting structure mounted on the frame and a transmission structure connecting the pneumatic lifting structure and the vertical plate. The pneumatic lifting structure can drive the vertical plate to slide relative to the movable seat through the transmission structure, and when the movable seat slides in the frame, it can drive the transmission structure to move along the length direction of the frame.

[0009] As a further embodiment of the present invention: a guide member is fixed to the side of the frame, and the pneumatic lifting mechanism includes a vertical arm that is slidably connected to the frame through the guide member and a horizontal arm that is fixedly connected to the vertical arm. The horizontal arm is arranged along the length direction of the frame, and a cylinder is rotatably mounted on the side of the frame. The movable end of the cylinder is hinged to the end of the vertical arm away from the horizontal arm.

[0010] As a further embodiment of the present invention: the transmission structure includes a follower block fixedly connected to the end of the vertical plate away from the rotating shaft, and the horizontal arm is provided with a sliding groove along its own length direction, and the follower block is slidably fitted into the sliding groove.

[0011] As a further embodiment of the present invention: the vertical plate is provided with an installation chamber, the elastic mechanism includes a guide post fixed in the installation chamber and a spring sleeved on the guide post, a slider is also slidably provided in the installation chamber, the slider is slidably connected to the guide post, one end of the spring is connected to the slider, and the other end is connected to the bottom wall of the installation chamber; The slider has a sliding fit structure between one side and the rotating shaft, and a rolling fit structure between the other side and the frame.

[0012] As a further embodiment of the present invention: the rolling fit structure includes a roller installed on the side of the slider and a limiting plate fixed to the bottom of the frame, wherein the bottom of the limiting plate has a connected inclined surface and a flat surface; After the two electrostatic adsorption plates separate, the roller rolls along the inclined surface, causing the slider to slide in the mounting cavity and compressing the spring.

[0013] As a further embodiment of the present invention: the sliding fit structure includes a sleeve slidably sleeved on the rotating shaft, a drive post fixed on the sleeve, and a groove in a spiral shape that is adapted to the drive post on the outer wall of the rotating shaft, the drive post extending into the groove and slidably connected to the rotating shaft. The sleeve and the slider are further provided with a connecting rod, and the two ends of the connecting rod are respectively hinged to the sleeve and the slider.

[0014] As a further embodiment of the present invention: the collection mechanism includes a housing fixedly connected to the frame and a vacuum cleaner installed on the side of the frame. The vacuum cleaner is connected to the housing through a conduit, and the housing is adapted to the assembly frame.

[0015] A method for detecting minute contamination defects in OLED displays, using the aforementioned polarized visual inspection device, includes the following steps: Step 1: The screen to be inspected is transferred to the horizontal platform; Step 2: The power mechanism drives the vertical plate to descend, bringing the electrostatic adsorption plate close to the screen surface for dust adsorption. The two movable seats move away from each other, and the elastic mechanism drives the electrostatic adsorption plate to deflect. The collection mechanism removes dust from the electrostatic adsorption plate. Step 3: The frame moves intermittently along the length of the horizontal platform, and Step 2 is repeated before each movement; Step 4: After dust removal is complete, the camera captures an image of the screen surface. Step 5: Analyze the image information to identify contamination defects on the screen surface.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention sets up two electrostatic adsorption plates distributed along the width of the screen, and at the same time moves the frame along the length of the screen, so that the two electrostatic adsorption plates can effectively perform comprehensive dust removal on the screen. After each dust removal operation, the opposing drive mechanism can switch the docking state of the two plates to the separation state, and with the triggering of the elastic mechanism, the two plates will swing, that is, the side that adsorbs dust will turn away from the horizontal platform to collect dust. To address this, two smaller electrostatic adsorption plates are used. By raising, lowering, translating, and deflecting these plates, dust on the screen surface can be thoroughly removed. This avoids the problem of poor adsorption caused by using a plate the same size as the screen, where the voltage and electric field strength are difficult to control. This provides an effective guarantee for the accuracy of subsequent testing. Moreover, the dust collection mechanism can promptly transfer dust, preventing the localized reduction in dust adsorption capacity caused by dust accumulation on the electrostatic adsorption plates and avoiding the problem of missed dust removal points. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one embodiment of a polarized visual inspection device for micro-dot contamination defects in OLED displays.

[0018] Figure 2 This is a schematic diagram of another aspect of an embodiment of a polarized visual inspection device for tiny dot contamination defects in OLED displays.

[0019] Figure 3 This is a schematic diagram of the structure of a polarized visual inspection device for micro-dot contamination defects in OLED displays from another angle.

[0020] Figure 4 This is a schematic diagram of the internal structure of the inspection cabinet in one embodiment of a polarized visual inspection device for micro-dot contamination defects in OLED displays.

[0021] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0022] Figure 6 This is a side view of the internal structure of the inspection cabinet in one embodiment of a polarized visual inspection device for micro-dot contamination defects in OLED displays.

[0023] Figure 7 This is a schematic diagram of the frame structure in one embodiment of a polarized visual inspection device for micro-dot contamination defects in OLED displays.

[0024] Figure 8 for Figure 7 A structural diagram from another angle.

[0025] Figure 9 for Figure 7Enlarged view of the structure at point B in the middle.

[0026] Figure 10 for Figure 8 Enlarged view of the structure at point C.

[0027] Figure 11 An exploded view of the power mechanism in one embodiment of a polarized visual inspection device for micro-dot contamination defects in OLED displays.

[0028] Figure 12 An exploded view of the elastic mechanism in one embodiment of a polarized visual inspection device for micro-dot contamination defects in OLED displays.

[0029] In the diagram: 1. Inspection cabinet; 2. Horizontal platform; 3. Linear drive module; 4. Frame; 401. Guide component; 5. Movable seat; 6. Vertical plate; 7. Vertical arm; 8. Horizontal arm; 801. Slide groove; 9. Follower block; 10. Cylinder; 11. Guide column; 12. Spring; 13. Rotating shaft; 1301. Groove; 14. Assembly frame; 15. Electrostatic adsorption plate; 16. Power supply module; 17. Slider; 1701. Roller; 18. Connecting rod; 19. Sleeve; 1901. Drive column; 20. Limiting plate; 2001. Inclined surface; 2002. Flat surface; 21. Housing; 22. Vacuum cleaner; 23. Conduit; 24. Camera. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] Please see Figures 1-12 In this embodiment of the invention, the polarization visual inspection device for micro-point contamination defects in an OLED display includes an inspection cabinet 1, a horizontal platform 2 disposed inside the inspection cabinet 1, and a camera 24 mounted on the top wall of the inspection cabinet 1, and further includes: The frame 4 is movable inside the testing cabinet 1 and two movable seats 5 are symmetrically slidably installed inside the frame 4. The frame 4 can move along the length of the horizontal platform 2. Two vertical plates 6 are movably installed on the movable seats 5. A rotating shaft 13 is rotatably installed between the two vertical plates 6. An assembly frame 14 is fixed on the rotating shaft 13. An electrostatic adsorption plate 15 is provided in the assembly frame 14. Among them, the vertical plate 6 can be driven by the power mechanism on the frame 4 to slide relative to the movable seat 5 so that the electrostatic adsorption plate 15 is close to or away from the screen on the horizontal platform 2. The two movable seats 5 can be driven away by the opposing drive mechanism on the frame 4 so that the two docked electrostatic adsorption plates 15 are separated. The rotating shaft 13 is also connected to two sets of elastic mechanisms. The elastic mechanisms are triggered after the two electrostatic adsorption plates 15 are separated, driving the assembly frame 14 to drive the electrostatic adsorption plates 15 to perform a swaying action so that the dust-collecting surface of the electrostatic adsorption plates 15 is away from the horizontal platform 2. The collection mechanism provided on the frame 4 transfers the dust on the electrostatic adsorption plates 15.

[0033] It should be further explained that in this invention, the camera 24 is used in conjunction with a polarizing filter. Specifically, a polarizing filter is an optical element that allows light polarized in a specific direction to pass through while blocking light polarized in other directions. When the polarizing filter is used in conjunction with the camera 24, polarization detection of the screen can be achieved. When the screen displays an image, the light on its surface will have different polarization states due to factors such as the screen's material and structure. Through the filtering effect of the polarizing filter, the camera 24 can capture light with a specific polarization direction, thereby more clearly observing the details of the screen surface, such as the arrangement of liquid crystal molecules inside the screen, scratches, stains, and other defects on the screen surface. These defects will exhibit different polarization characteristics under polarization detection, making them easier to identify and thus improving the accuracy of the detection.

[0034] Furthermore, during inspection, after the electrostatic adsorption plate 15 removes dust from the screen to be inspected, the camera 24 acquires images of the screen surface. After acquiring the images, the camera 24 sends the acquired image information to the image processing system for analysis. The image processing system first preprocesses the acquired images, including grayscale conversion and filtering / denoising, to improve image quality and analyzability. Subsequently, the system uses advanced image analysis algorithms, such as edge detection and feature extraction, to perform a detailed analysis of the screen surface in the image. Based on a preset contamination defect feature model, such as the shape of scratches and the texture of stains, the system identifies and marks abnormal areas in the image. Finally, based on the number, size, and distribution of the identified abnormal areas, the system determines whether contamination defects exist on the screen surface and generates a corresponding inspection report, providing an accurate basis for subsequent screen quality assessment and processing.

[0035] Before the camera 24 performs image acquisition, the electrostatic adsorption plate 15 is used to adsorb and remove dust and foreign objects that may exist on the screen surface, so as to avoid the image processing system from misjudging these dust as defects during analysis, which would cause the detection results to deviate from the actual situation. Specifically, with attachment Figure 8 Taking the state shown as an example, at this time, the two electrostatic adsorption plates 15 are in a docking state, the power mechanism works, and drives the vertical plate 6 to move downward relative to the movable seat 5 until the electrostatic adsorption plate 15 is close to the screen and successfully adsorbs the dust on the screen surface. Whenever the electrostatic adsorption plate 15 completes the dust transfer treatment of a certain area of ​​the screen, it needs to change its position. For this purpose, two sets of linear drive modules 3 are also provided in the detection cabinet 1. The two sets of linear drive modules 3 are respectively connected to the two ends of the frame 4 and are used to drive the frame 4 to move intermittently along the length direction of the horizontal platform 2 to change the working position of the electrostatic adsorption plate 15. After the electrostatic adsorption plate 15 completes one operation, the power mechanism drives the vertical plate 6 to lift the electrostatic adsorption plate 15. Subsequently, the opposing drive mechanism drives the two movable seats 5 to move away from each other. Accordingly, the two electrostatic adsorption plates 15 that were in the docking state separate. In the latter part of this process, the elastic mechanism is triggered, causing the rotating shaft 13 to drive the electrostatic adsorption plate 15 to perform a swinging action through the assembly frame 14, so that the electrostatic adsorption plate 15 switches from a horizontal state to a vertical state, and its dust adsorption surface faces away from the horizontal platform 2. The collection mechanism then transfers the dust on the electrostatic adsorption plate 15. Therefore, by setting two electrostatic adsorption plates 15 distributed along the width of the screen, and cooperating with the movement of the frame 4 along the length of the screen, the two electrostatic adsorption plates 15 can effectively perform comprehensive dust removal on the screen. After each dust removal operation, the opposing drive mechanism can switch the docking state of the two plates to the separation state, and with the triggering of the elastic mechanism, the two plates will swing, that is, the side adsorbing dust will turn away from the horizontal platform 2 to collect dust. To address this, two smaller electrostatic adsorption plates 15 are used. By raising, lowering, translating, and deflecting these plates, the dust on the screen surface can be completely removed. This avoids the problem of poor adsorption effect caused by using a plate of the same size as the screen area, which is difficult to control due to voltage and electric field strength. This provides an effective guarantee for the accuracy of subsequent testing. In addition, the dust collection mechanism can transfer the dust in a timely manner, avoiding the problem of reduced local dust collection capacity caused by dust accumulation on the electrostatic adsorption plates 15, which could lead to missed dust removal points.

[0036] Furthermore, it should be noted that the linear drive module 3 is an application of existing technology, which uses a unidirectional lead screw and a servo motor to drive the frame 4 to perform linear motion. Similarly, for the opposing drive mechanism, it includes a bidirectional lead screw (not labeled in the figure) rotatably mounted on the frame 4. Two connecting blocks that are threadedly connected to the bidirectional lead screw are symmetrically provided on the bidirectional lead screw. The connecting blocks are fixed to the movable seat 5. Furthermore, a guide groove is provided on the inner side of the frame 4, and the frame 4 is slidably fitted into the frame 4 through the guide groove.

[0037] Please refer to it again. Figure 12 The assembly frame 14 is U-shaped and has an assembly groove on its inner wall that is compatible with the electrostatic adsorption plate 15. A power supply module 16 is also provided on the side of the assembly frame 14 away from the electrostatic adsorption plate 15. When the collection mechanism is working, the power supply module 16 switches the power-on state of the electrostatic adsorption plate 15 to the power-off state.

[0038] The two electrostatic adsorption plates 15 are moved away from each other. After the elastic mechanism causes the assembly frame 14 to switch the electrostatic adsorption plates 15 from a horizontal state to a vertical state, the power supply module 16 disconnects the power supply to the electrostatic adsorption plates 15. As a result, the electrostatic adsorption plates 15 lose their adsorption force on dust, so that the dust can be transferred in the collection process, avoiding the problem of dust accumulation on the electrostatic adsorption plates 15, which would lead to a reduction in the subsequent local dust collection capacity.

[0039] Please refer to it again. Figure 5 , Figure 7 , Figure 8 as well as Figure 11 The power mechanism includes a pneumatic lifting structure mounted on the frame 4 and a transmission structure connecting the pneumatic lifting structure and the vertical plate 6. The pneumatic lifting structure can drive the vertical plate 6 to slide relative to the movable seat 5 through the transmission structure, and when the movable seat 5 slides within the frame 4, it can drive the transmission structure to move along the length direction of the frame 4. A guide member 401 is fixed to the side of the frame 4. The pneumatic lifting mechanism includes a vertical arm 7 slidably connected to the frame 4 through the guide member 401 and a horizontal arm 8 fixedly connected to the vertical arm 7. The horizontal arm 8 is arranged along the length direction of the frame 4. A cylinder 10 is also rotatably mounted on the side of the frame 4. The movable end of the cylinder 10 is hinged to the end of the vertical arm 7 away from the horizontal arm 8. The transmission structure includes a follower block 9 fixedly connected to the end of the vertical plate 6 away from the rotating shaft 13. A sliding groove 801 is provided on the horizontal arm 8 along its own length direction, and the follower block 9 is slidably fitted into the sliding groove 801.

[0040] Specifically, when the two movable seats 5 slide away from each other within the frame 4 to make the two electrostatic adsorption plates 15 move away from each other, the movable seats 5 drive the follower block 9 to slide within the slide groove 801 via the vertical plate 6. Before dust removal, the movable end of the cylinder 10 extends, which can drive the vertical arm 7 to slide downward relative to the frame 4. Then, the horizontal arm 8 can drive the vertical plate 6 to slide downward relative to the movable seat 5 through the follower block 9, so that the electrostatic adsorption plate 15 is close to the screen. Conversely, after the electrostatic adsorption plate 15 completes the dust removal of a local area of ​​the screen, the movable end of the cylinder 10 retracts so that the electrostatic adsorption plate 15 is raised away from the screen, thereby facilitating the smooth switching of the electrostatic adsorption plate 15 from a horizontal state to a vertical state.

[0041] Please refer to it again. Figure 9 , Figure 10 as well as Figure 12 The vertical plate 6 has an installation chamber. The elastic mechanism includes a guide post 11 fixed in the installation chamber and a spring 12 sleeved on the guide post 11. A slider 17 is also slidably installed in the installation chamber. The slider 17 is slidably connected to the guide post 11. One end of the spring 12 is connected to the slider 17, and the other end is connected to the bottom wall of the installation chamber. One side of the slider 17 has a sliding fit structure with the rotating shaft 13, and the other side has a rolling fit structure with the frame 4.

[0042] The rolling engagement structure includes a roller 1701 mounted on the side of the slider 17 and a limiting plate 20 fixed to the bottom of the frame 4. The bottom of the limiting plate 20 has a connected inclined surface 2001 and a flat surface 2002. After the two electrostatic adsorption plates 15 separate, the roller 1701 rolls along the inclined surface 2001, causing the slider 17 to slide in the mounting cavity and compressing the spring 12. The sliding engagement structure includes a sleeve 19 slidably sleeved on the rotating shaft 13. A drive column 1901 is fixed on the sleeve 19. The outer wall of the rotating shaft 13 has a spirally arranged groove 1301 that matches the drive column 1901. The drive column 1901 extends into the groove 1301 and is slidably connected to the rotating shaft 13. A connecting rod 18 is also provided between the sleeve 19 and the slider 17. The two ends of the connecting rod 18 are respectively hinged to the sleeve 19 and the slider 17.

[0043] In detail, whenever the electrostatic adsorption plate 15 finishes cleaning the dust in a local area of ​​the screen, the power mechanism drives the vertical plate 6 to lift the electrostatic adsorption plate 15 so that the electrostatic adsorption plate 15 has a certain deflection space. At this time, the roller 1701 corresponds to the limiting plate 20. Subsequently, the two movable seats 5 move away from each other. This process is divided into three stages, specifically: In the first stage, the roller 1701 moves toward the inclined surface 2001, but does not contact the inclined surface 2001. During this process, the two electrostatic adsorption plates 15 separate. In the second stage, the roller 1701 rolls on the inclined surface 2001, causing the slider 17 to move aside, so that the slider 17 slides downward in the mounting cavity. The spring 12 is compressed. Correspondingly, the slider 17 pushes the sleeve 19 to slide along the axis of the rotating shaft 13 through the connecting rod 18. The drive column 1901 slides with the rotating shaft 13 through the groove 1301, causing the rotating shaft 13 to rotate. Thus, the rotating shaft 13 drives the assembly frame 14 and the electrostatic adsorption plate 15 to deflect by 90°. In the third stage, the roller 1701 rolls on the flat surface 2002, while the electrostatic adsorption plate 15 remains vertical and moves toward the collection mechanism.

[0044] Please refer to it again. Figure 9 The collection mechanism includes a housing 21 fixedly connected to the frame 4 and a vacuum cleaner 22 installed on the side of the frame 4. The vacuum cleaner 22 is connected to the housing 21 through a conduit 23, and the housing 21 is adapted to the assembly frame 14.

[0045] As the two movable seats 5 move away from each other, the electrostatic adsorption plate 15 will swing from a horizontal state to a vertical state. As the movable seats 5 continue to move, the electrostatic adsorption plate 15 moves towards the housing 21 while maintaining a vertical state. Finally, the assembly frame 14 abuts against the side of the housing 21. Then, the vacuum cleaner 22 is turned on, and the power supply module 16 disconnects the power supply to the electrostatic adsorption plate 15. Thus, the vacuum cleaner 22 can remove the dust that falls from the electrostatic adsorption plate 15, achieving timely cleaning of the electrostatic adsorption plate 15 and avoiding the problem of reduced suction capacity in local areas of the electrostatic adsorption plate 15 due to dust accumulation.

[0046] As another embodiment of the present invention, a method for detecting micro-dot contamination defects in OLED displays is also proposed, which employs the aforementioned polarized visual inspection device and includes the following steps: Step 1: The screen to be inspected is transferred to the horizontal platform 2; Step 2: The power mechanism drives the vertical plate 6 to descend, bringing the electrostatic adsorption plate 15 close to the screen surface for dust adsorption. The two movable seats 5 move away from each other, and the elastic mechanism drives the electrostatic adsorption plate 15 to deflect. The collection mechanism removes dust from the electrostatic adsorption plate 15. Step 3: The frame 4 moves intermittently along the length of the platform 2, and Step 2 is repeated before each movement; Step 4: After dust removal is complete, camera 24 captures an image of the screen surface; Step 5: Analyze the image information to identify contamination defects on the screen surface.

[0047] 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.

[0048] 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. A polarized visual inspection device for micro-dot contamination defects in OLED displays, comprising an inspection cabinet, a horizontal platform inside the inspection cabinet, and a camera mounted on the top wall of the inspection cabinet; Its features are, Also includes: The frame is movable inside the testing cabinet and two movable seats are symmetrically slidably installed inside the frame. The frame can move along the length of the horizontal platform. Two vertical plates are movably installed on the movable seats. A rotating shaft is rotatably installed between the two vertical plates. An assembly frame is fixed on the rotating shaft. An electrostatic adsorption plate is provided in the assembly frame. The vertical plate can be driven by a power mechanism on the frame to slide relative to the movable seat, so that the electrostatic adsorption plate can move closer to or away from the screen on the horizontal platform. The two movable seats can be driven away from the movable seats by opposing drive mechanisms on the frame, so that the two docked electrostatic adsorption plates can be separated. The rotating shaft is also connected to two sets of elastic mechanisms. The elastic mechanisms are triggered after the two electrostatic adsorption plates are separated, driving the assembly frame to move the electrostatic adsorption plates to perform a swaying action so that the dust-collecting surface of the electrostatic adsorption plates is away from the horizontal platform. The collection mechanism on the frame transfers the dust on the electrostatic adsorption plates.

2. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 1, characterized in that, The assembly frame is U-shaped and has an assembly groove on its inner wall that is compatible with the electrostatic adsorption plate. A power supply module is also provided on the side of the assembly frame away from the electrostatic adsorption plate. When the collection mechanism is working, the power supply module switches the power supply state of the electrostatic adsorption plate to the power-off state.

3. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 1, characterized in that, The power mechanism includes a pneumatic lifting structure mounted on the frame and a transmission structure connecting the pneumatic lifting structure and the vertical plate. The pneumatic lifting structure can drive the vertical plate to slide relative to the movable seat through the transmission structure, and when the movable seat slides in the frame, it can drive the transmission structure to move along the length direction of the frame.

4. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 3, characterized in that, A guide is fixed to the side of the frame. The pneumatic lifting mechanism includes a vertical arm that is slidably connected to the frame through the guide and a horizontal arm that is fixedly connected to the vertical arm. The horizontal arm is arranged along the length of the frame. A cylinder is also rotatably mounted on the side of the frame. The movable end of the cylinder is hinged to the end of the vertical arm away from the horizontal arm.

5. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 4, characterized in that, The transmission structure includes a follower block fixedly connected to the end of the vertical plate away from the rotating shaft, and a sliding groove is provided on the horizontal arm along its own length direction, and the follower block is slidably fitted into the sliding groove.

6. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 1, characterized in that, The vertical plate has an installation chamber. The elastic mechanism includes a guide post fixed in the installation chamber and a spring sleeved on the guide post. A slider is also slidably provided in the installation chamber. The slider is slidably connected to the guide post. One end of the spring is connected to the slider, and the other end is connected to the bottom wall of the installation chamber. The slider has a sliding fit structure between one side and the rotating shaft, and a rolling fit structure between the other side and the frame.

7. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 6, characterized in that, The rolling engagement structure includes a roller installed on the side of the slider and a limiting plate fixed to the bottom of the frame. The bottom of the limiting plate has a connected inclined surface and a flat surface. After the two electrostatic adsorption plates separate, the roller rolls along the inclined surface, causing the slider to slide in the mounting cavity and compressing the spring.

8. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 7, characterized in that, The sliding fit structure includes a sleeve slidably fitted on the rotating shaft, a drive post fixed on the sleeve, and a spiral groove on the outer wall of the rotating shaft that is adapted to the drive post. The drive post extends into the groove and is slidably connected to the rotating shaft. The sleeve and the slider are further provided with a connecting rod, and the two ends of the connecting rod are respectively hinged to the sleeve and the slider.

9. The polarized visual inspection device for micro-dot contamination defects in OLED displays according to claim 1, characterized in that, The collection mechanism includes a housing fixedly connected to the frame and a vacuum cleaner installed on the side of the frame. The vacuum cleaner is connected to the housing through a conduit, and the housing is adapted to the assembly frame.

10. A method for detecting micro-dot contamination defects in an OLED display, employing the polarized visual inspection device as described in claim 1, characterized in that, Includes the following steps: Step 1: The screen to be inspected is transferred to the horizontal platform; Step 2: The power mechanism drives the vertical plate to descend, bringing the electrostatic adsorption plate close to the screen surface for dust adsorption. The two movable seats move away from each other, and the elastic mechanism drives the electrostatic adsorption plate to deflect. The collection mechanism removes dust from the electrostatic adsorption plate. Step 3: The frame moves intermittently along the length of the horizontal platform, and Step 2 is repeated before each movement; Step 4: After dust removal is complete, the camera captures an image of the screen surface. Step 5: Analyze the image information to identify contamination defects on the screen surface.

Images