OLED display screen tiny point pollution defect polarized visual detection device and method

Abstract

The application relates to the technical field of OLED display screen detection, in particular to an OLED display screen micro-point pollution defect polarized visual detection device and method, which comprises a detection cabinet, a horizontal table arranged in the detection cabinet and a camera arranged on the top wall of the detection cabinet, and further comprises a frame body movably arranged in the detection cabinet and two movable seats symmetrically and slidably arranged in the frame body, the frame body can move along the length direction of the horizontal table, two vertical plates are movably arranged on the movable seats, a rotating shaft is rotatably arranged between the two vertical plates, an assembling frame is fixed on the rotating shaft, and an electrostatic adsorption plate is arranged in the assembling frame; the two smaller electrostatic adsorption plates can comprehensively remove dust on the screen surface through lifting, translation and deflection of the two electrostatic adsorption plates, the problem that the adsorption effect is poor due to the difficulty in controlling the voltage and the electric field intensity when a plate with the same area as the screen is used to adsorb dust is avoided, and effective guarantee is provided for the accuracy of subsequent detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of OLED display screen detection, in particular to an OLED display screen micro-point pollution defect polarized visual detection device and method. BACKGROUND

[0002] As a new type of display technology, OLED display screens have been widely used in many fields due to their excellent display effect and unique performance advantages. During the production process of OLED display screens, some micro-pollution defects may appear on the surface of the OLED display screens. These defects, although small, can significantly affect the actual use performance of the OLED display screens, such as reducing display quality and shortening service life. The causes of these micro-point defects are mainly related to various factors in the production process, such as insufficient purity of raw materials, insufficient cleanliness of production equipment, dust pollution in the production environment, and improper operation in the production process, etc.

[0003] In order to ensure the quality of OLED display screens, avoid substandard products from entering the market, and improve the production process, it is necessary to conduct strict defect detection on the surface of OLED display screens during the production process. At present, visual detection is one of the commonly used detection methods. Through image acquisition of the display screen surface by a camera, and then analyzing the collected images by a computer, it can be determined whether there are defects on the surface of the display screen. However, in the actual detection process, if there is dust on the surface of the display screen, the computer may misjudge these removable dust as defect points when analyzing, resulting in inaccurate detection results. In order to solve this problem, some existing detection equipment is equipped with a dust removal structure to clean the dust on the surface of the display screen before starting detection. However, the traditional contact wiping method has certain disadvantages. Since dust accumulates on the wiping component, the dust and the display screen surface are scraped, which can easily cause scratches on the display screen surface, thereby causing new defects. Therefore, using electrostatic adsorption, a non-contact dust removal method, becomes a better choice.

[0004] However, for a larger screen, if a static adsorption plate with the same area is used for dust removal, it is difficult to control the voltage and electric field intensity, and the electric field distribution may become uneven. This uneven electric field distribution can result in poor adsorption effect. If a static adsorption plate with a smaller area is used, but as dust accumulates on the static adsorption plate, the dust removal capacity of the part with more dust may decrease, thereby causing dust removal omissions and poor dust removal effect, making it difficult to effectively ensure the accuracy of the detection results. SUMMARY

[0005] The present application relates to the technical field of OLED display screen detection, in particular to an OLED display screen micro-point pollution defect polarized visual detection device and method.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] The device for detecting the polarization vision of the micro-point pollution defects of the OLED display screen comprises a detection cabinet, a horizontal table arranged in the detection cabinet, and a camera arranged on the top wall of the detection cabinet, and further comprises:

[0008] The frame body is movably arranged in the detection cabinet, and the two movable seats are symmetrically and slidably arranged in the frame body; the frame body can move along the length direction of the horizontal table; two vertical plates are movably arranged on the movable seats; a rotating shaft is rotatably arranged between the two vertical plates; an assembly frame is fixedly arranged on the rotating shaft; and an electrostatic adsorption plate is arranged in the assembly frame.

[0009] The vertical plates can be driven by a power mechanism arranged on the frame body to slide relative to the movable seats, so that the electrostatic adsorption plate is close to or away from the screen on the horizontal table; the two movable seats can be driven by a facing driving mechanism arranged on the frame body to move away from each other, so that the two electrostatic adsorption plates are separated from each other.

[0010] The rotating shaft is further connected with two elastic mechanisms; the elastic mechanisms are triggered after the two electrostatic adsorption plates are separated from each other, so as to drive the assembly frame to drive the electrostatic adsorption plate to perform a swing action, so that the dust suction surface of the electrostatic adsorption plate is away from the horizontal table; and a collecting mechanism arranged on the frame body is used to transfer the dust on the electrostatic adsorption plate.

[0011] As a further scheme of the present application: the assembly frame is arranged in a shape similar to a "U", and an assembly groove matched with the electrostatic adsorption plate is arranged on the inner wall of the assembly frame; and a power supply module is further arranged on the side of the assembly frame away from the electrostatic adsorption plate; when the collecting mechanism works, the power supply module switches the power-on state of the electrostatic adsorption plate to a power-off state.

[0012] As a further scheme of the present application: the power mechanism comprises a pneumatic lifting structure arranged on the frame body 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 body, the transmission structure can be driven to move along the length direction of the frame body.

[0013] As a further scheme of the present application: a guide member is fixedly arranged on the side of the frame body; the pneumatic lifting structure comprises a vertical arm slidably connected with the frame body through the guide member and a horizontal arm fixedly connected with the vertical arm; the horizontal arm is arranged along the length direction of the frame body; a pneumatic cylinder is rotatably arranged on the side of the frame body; and the movable end of the pneumatic cylinder is hingedly connected with one end of the vertical arm away from the horizontal arm.

[0014] As a further scheme of the present application: the transmission structure comprises a follower block fixedly connected to the vertical plate away from the rotating shaft, and a sliding groove is arranged on the cross arm along the length direction of the cross arm, and the follower block is slidingly embedded in the sliding groove.

[0015] As a further scheme of the present application: the vertical plate is provided with a mounting cavity, the elastic mechanism comprises a guide column fixed in the mounting cavity and a spring sleeved on the guide column, and a sliding block is further slidingly arranged in the mounting cavity, the sliding block is slidingly connected with the guide column, one end of the spring is connected with the sliding block, and the other end is connected with the bottom wall of the mounting cavity.

[0016] Wherein, a sliding cooperation structure is arranged between one side of the sliding block and the rotating shaft, and a rolling cooperation structure is arranged between the other side of the sliding block and the frame body.

[0017] As a further scheme of the present application: the rolling cooperation structure comprises a roller mounted on the side of the sliding block and a limiting plate fixed on the bottom of the frame body, and the bottom of the limiting plate is formed with a connected inclined surface and a flat surface.

[0018] When the roller rolls along the inclined surface after the two electrostatic adsorption plates are separated, the sliding block slides in the mounting cavity, and the spring is compressed.

[0019] As a further scheme of the present application: the sliding cooperation structure comprises a sleeve slidingly sleeved on the rotating shaft, a driving column is fixed on the sleeve, a groove is arranged on the outer wall of the rotating shaft in a spiral shape and matched with the driving column, the driving column is inserted into the groove and slidingly connected with the rotating shaft.

[0020] Wherein, a connecting rod is further arranged between the sleeve and the sliding block, and the two ends of the connecting rod are respectively hinged with the sleeve and the sliding block.

[0021] As a further scheme of the present application: the collecting mechanism comprises a shell fixedly connected with the frame body and a dust collector mounted on the side end of the frame body, the dust collector is connected with the shell through a conduit, and the shell is matched with the assembly frame.

[0022] The OLED display screen micro-point pollution defect detection method adopts the polarized visual detection device, and comprises the following steps:

[0023] Step one: the screen to be detected is transferred to the horizontal table;

[0024] Step two: the power mechanism drives the vertical plate to descend, the electrostatic adsorption plate approaches the surface of the screen, dust adsorption is carried out, the two movable seats are away from each other, the elastic mechanism drives the electrostatic adsorption plate to deflect, and the collecting mechanism removes the dust on the electrostatic adsorption plate;

[0025] Step three, the frame moves intermittently along the length direction of the horizontal table, and step two is repeated before each movement;

[0026] Step four, after the dust removal is completed, the camera collects the surface image of the screen;

[0027] Step five, analyze the image information to determine the pollution defect points on the surface of the screen.

[0028] Compared with the prior art, the beneficial effects of the present application are:

[0029] The present application sets two electrostatic adsorption plates distributed along the width direction of the screen, and simultaneously cooperates with the movement of the frame along the length direction of the screen, so that the two electrostatic adsorption plates can effectively perform comprehensive dust removal on the screen, and after each dust removal work is completed, the facing driving mechanism can switch the butt joint state of the two electrostatic adsorption plates to the separated state, and cooperates with the elastic mechanism to trigger, so that the two electrostatic adsorption plates are deflected, that is, the side of the electrostatic adsorption plate that adsorbs dust deviates from the horizontal table, and dust collection is performed.

[0030] For this purpose, two smaller electrostatic adsorption plates are used, which can realize comprehensive removal of dust on the surface of the screen through lifting, translation and deflection of the two electrostatic adsorption plates, avoid the problem of poor adsorption effect caused by difficulty in controlling voltage and electric field intensity when a plate with the same area as the screen is used to adsorb dust, and provide effective guarantee for the accuracy of subsequent detection. Moreover, the dust collection mechanism can timely transfer the dust, avoid the problem of local dust removal capacity reduction caused by dust accumulation on the electrostatic adsorption plate, and cause dust removal omission. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 Structure schematic diagram of one embodiment of the OLED display screen micro-point pollution defect polarized light visual detection device.

[0032] Figure 2 Structure schematic diagram of another angle of one embodiment of the OLED display screen micro-point pollution defect polarized light visual detection device.

[0033] Figure 3 Structure schematic diagram of another angle of one embodiment of the OLED display screen micro-point pollution defect polarized light visual detection device.

[0034] Figure 4 Internal structure schematic diagram of the detection cabinet in one embodiment of the OLED display screen micro-point pollution defect polarized light visual detection device.

[0035] Figure 5 For Figure 4 Structure enlarged view of A in the middle.

[0036] Figure 6A side view of the internal structure of the detection cabinet in one embodiment of the OLED display screen micro-point pollution defect polarized visual detection device.

[0037] Figure 7 A structural schematic diagram of the frame body in one embodiment of the OLED display screen micro-point pollution defect polarized visual detection device.

[0038] Figure 8 For Figure 7 A structural schematic diagram from another angle.

[0039] Figure 9 For Figure 7 An enlarged view of the structure at B.

[0040] Figure 10 For Figure 8 An enlarged view of the structure at C.

[0041] Figure 11 An exploded view of the power mechanism in one embodiment of the OLED display screen micro-point pollution defect polarized visual detection device.

[0042] Figure 12 An exploded view of the elastic mechanism in one embodiment of the OLED display screen micro-point pollution defect polarized visual detection device.

[0043] In the figure: 1, detection cabinet; 2, horizontal table; 3, linear drive module; 4, frame body; 401, guide piece; 5, movable seat; 6, vertical plate; 7, vertical arm; 8, horizontal arm; 801, sliding groove; 9, follower block; 10, air cylinder; 11, guide column; 12, spring; 13, rotating shaft; 1301, groove; 14, assembly frame; 15, electrostatic adsorption plate; 16, power supply module; 17, sliding block; 1701, roller; 18, connecting rod; 19, sleeve; 1901, drive column; 20, limiting plate; 2001, inclined surface; 2002, flat surface; 21, shell; 22, dust collector; 23, conduit; 24, camera. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] In addition, elements in the present application can be referred to as being "fixed" or "settled" on another element, which can be directly on the other element or can have a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or can have a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0046] Referring to Figures 1-12 In the embodiment of the present application, the OLED display screen micro-point pollution defect polarized visual detection device comprises a detection cabinet 1, a horizontal table 2 arranged in the detection cabinet 1, and a camera 24 mounted on the top wall of the detection cabinet 1, and further comprises:

[0047] The frame body 4 is movably arranged in the detection cabinet 1, and the two movable seats 5 are symmetrically and slidably arranged in the frame body 4. The frame body 4 can move along the length direction of the horizontal table 2. Two vertical plates 6 are movably arranged on the movable seats 5. A rotating shaft 13 is rotatably arranged between the two vertical plates 6. An assembly frame 14 is fixed on the rotating shaft 13. An electrostatic adsorption plate 15 is arranged in the assembly frame 14.

[0048] The vertical plate 6 can be driven by a power mechanism arranged on the frame body 4 to slide relative to the movable seat 5, so that the electrostatic adsorption plate 15 approaches or moves away from the screen on the horizontal table 2. The two movable seats 5 can be driven away from the movable seat 5 by a facing driving mechanism arranged on the frame body 4, so that the two electrostatic adsorption plates 15 are separated.

[0049] The rotating shaft 13 is further connected with two elastic mechanisms. The elastic mechanisms are triggered after the two electrostatic adsorption plates 15 are separated, drive the assembly frame 14 to drive the electrostatic adsorption plate 15 to perform a swing action, so that the dust collection surface of the electrostatic adsorption plate 15 is away from the horizontal table 2. A collection mechanism arranged on the frame body 4 transfers the dust on the electrostatic adsorption plate 15.

[0050] It should be noted that in the present application, the camera 24 is used in cooperation with the polarizer. Specifically, the polarizer is an optical element that can allow polarized light of a specific direction to pass through while blocking polarized light of other directions. When the polarizer is used in cooperation with the camera 24, polarized detection of the screen can be achieved. When the screen displays an image, the light on the surface of the screen will have different polarization states due to factors such as the material and structure of the screen. Through the screening effect of the polarizer, the camera 24 can capture light of a specific polarization direction, thereby more clearly observing the details on the surface of the screen, such as the arrangement of liquid crystal molecules inside the screen, scratches and stains on the surface of the screen, and other defects. These defects will exhibit different polarization characteristics under polarized detection, making them easier to identify, thereby improving the accuracy of detection.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Therefore, the present application sets two electrostatic adsorption plates 15 distributed along the screen width direction, and cooperates with the movement of the frame body 4 along the screen length direction, so that the two electrostatic adsorption plates 15 can effectively perform comprehensive dust removal on the screen, and after each dust removal work is completed, the facing driving mechanism can switch the butt joint state of the two to the separated state, and cooperates with the elastic mechanism to trigger the deflection of the two, that is, the side of the dust adsorption is away from the horizontal table 2, and the dust collection is performed.

[0056] For this, two smaller electrostatic adsorption plates 15 are used to realize comprehensive removal of dust on the screen surface through lifting, translation and deflection of the two, avoid using a plate with the same area as the screen to adsorb dust, and the problem of poor adsorption effect caused by difficult control of voltage and electric field strength, which provides effective guarantee for the accuracy of subsequent detection, and the dust collection mechanism can timely transfer the dust to avoid the problem of local dust removal capacity reduction caused by dust accumulation on the electrostatic adsorption plate 15.

[0057] In addition, it should be pointed out that the linear drive module 3 is an application of prior art, which uses a one-way screw rod and a servo motor to drive the frame body 4 to move linearly, and similarly, the facing driving mechanism includes a bidirectional screw rod (not labeled in the figure) rotatably installed on the frame body 4, two connecting blocks symmetrically arranged on the bidirectional screw rod and threadedly connected with the bidirectional screw rod, and the connecting blocks are fixed with the movable seat 5, and further, the inner side of the frame body 4 is provided with a guide groove, and the frame body 4 is slidably embedded in the frame body 4 through the guide groove.

[0058] Please refer again to Figure 12 , the assembly frame 14 is arranged in a "U" shape, and the inner wall is provided with an assembly groove matched with the electrostatic adsorption plate 15, and the side away from the electrostatic adsorption plate 15 is also provided with a power supply module 16, and when the collection mechanism works, the power supply module 16 switches the power-on state of the electrostatic adsorption plate 15 to the power-off state.

[0059] When the two electrostatic adsorption plates 15 are away from each other, the elastic mechanism promotes the assembly frame 14 to drive the electrostatic adsorption plate 15 to switch from the horizontal state to the vertical state, and the power supply module 16 disconnects the power supply to the electrostatic adsorption plate 15, so that the electrostatic adsorption plate 15 loses the adsorption force to the dust, so that the collection work can transfer the dust, avoiding the problem of local dust removal capacity reduction caused by dust accumulation on the electrostatic adsorption plate 15.

[0060] Please refer again to Figure 5 , Figure 7 , Figure 8 and Figure 11The power mechanism comprises 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 in the frame 4, the transmission structure can be driven to move along the length direction of the frame 4. The side of the frame 4 is fixed with a guide 401, the pneumatic lifting structure comprises a vertical arm 7 slidably connected with the frame 4 through the guide 401 and a horizontal arm 8 fixedly connected with the vertical arm 7, the horizontal arm 8 is arranged along the length direction of the frame 4, and a pneumatic cylinder 10 is rotatably mounted on the side of the frame 4, the movable end of the pneumatic cylinder 10 is hingedly connected with one end of the vertical arm 7 away from the horizontal arm 8. The transmission structure comprises a follower 9 fixedly connected with the vertical plate 6 away from the rotating shaft 13, and a sliding groove 801 is arranged on the horizontal arm 8 along the length direction of the horizontal arm 8, and the follower 9 is slidably embedded in the sliding groove 801.

[0061] Specifically, when the two movable seats 5 slide away from each other in the frame 4 so that the two electrostatic adsorption plates 15 move away from each other, the movable seat 5 drives the follower 9 to slide in the sliding groove 801 through the vertical plate 6;

[0062] Before dust removal, the movable end of the pneumatic cylinder 10 is extended, so as to drive the vertical arm 7 to slide downward relative to the frame 4, and then the horizontal arm 8 drives the vertical plate 6 to slide downward relative to the movable seat 5 through the follower 9, so that the electrostatic adsorption plate 15 approaches the screen;

[0063] Conversely, after the electrostatic adsorption plate 15 completes dust removal on the local area of the screen, the movable end of the pneumatic cylinder 10 is retracted, so that the electrostatic adsorption plate 15 is lifted and moves away from the screen, thereby facilitating the electrostatic adsorption plate 15 to be switched from the horizontal state to the vertical state smoothly.

[0064] Please refer to Figure 9 , Figure 10 and Figure 12 again, the vertical plate 6 is provided with a mounting chamber, the elastic mechanism comprises a guide column 11 fixed in the mounting chamber and a spring 12 sleeved on the guide column 11, and a sliding block 17 is slidably arranged in the mounting chamber, the sliding block 17 is slidably connected with the guide column 11, one end of the spring 12 is connected with the sliding block 17, and the other end is connected with the bottom wall of the mounting chamber; the sliding block 17 is provided with a sliding cooperation structure between one side and the rotating shaft 13, and is provided with a rolling cooperation structure between the other side and the frame 4.

[0065] The rolling fit structure comprises a roller 1701 mounted on the side of the sliding block 17 and a limiting plate 20 fixed on the bottom of the frame body 4, and the bottom of the limiting plate 20 is formed with a connected inclined surface 2001 and a flat surface 2002; when the two electrostatic adsorption plates 15 are separated and the roller 1701 rolls along the inclined surface 2001, the sliding block 17 is caused to slide in the mounting chamber, and the spring 12 is compressed. The sliding fit structure comprises a sleeve 19 sleeved on the rotating shaft 13, a driving column 1901 is fixed on the sleeve 19, a groove 1301 is arranged on the outer wall of the rotating shaft 13 in a spiral manner and is matched with the driving column 1901, the driving column 1901 extends into the groove 1301 and is in sliding connection with the rotating shaft 13; a connecting rod 18 is further arranged between the sleeve 19 and the sliding block 17, and the two ends of the connecting rod 18 are respectively hinged to the sleeve 19 and the sliding block 17.

[0066] In detail, when the electrostatic adsorption plate 15 completes dust removal on 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;

[0067] Subsequently, the two movable seats 5 move away from each other, and this process is divided into three stages, specifically:

[0068] In the first stage, the roller 1701 moves towards the inclined surface 2001, but does not contact the inclined surface 2001, in this process, the two electrostatic adsorption plates 15 are separated;

[0069] In the second stage, the roller 1701 rolls on the inclined surface 2001, drives the sliding block 17 to make room, so that the sliding block 17 slides downward in the mounting chamber, the spring 12 is compressed, correspondingly, the sliding block 17 pushes the sleeve 19 to slide on the rotating shaft 13 along the axial direction of the rotating shaft 13 through the connecting rod 18, the driving column 1901 is in sliding fit with the rotating shaft 13 through the groove 1301, so that the rotating shaft 13 rotates, then the rotating shaft 13 drives the assembly frame 14 and the electrostatic adsorption plate 15 to deflect 90°;

[0070] In the third stage, the roller 1701 rolls on the flat surface 2002, the electrostatic adsorption plate 15 remains in a vertical state and moves towards the collecting mechanism.

[0071] Please refer to Figure 9 , the collecting mechanism comprises a shell 21 fixedly connected with the frame body 4 and a dust collector 22 mounted on the side end of the frame body 4, the dust collector 22 is connected with the shell 21 through a conduit 23, and the shell 21 is matched with the assembly frame 14.

[0072] During the process of moving away from each other, the electrostatic adsorption plate 15 is inclined from the horizontal state to the vertical state, and with the continuous movement of the movable seat 5, the electrostatic adsorption plate 15 keeps the vertical state and moves towards the shell 21, finally, the assembly frame 14 abuts against the side of the shell 21, then the dust collector 22 is started, the power supply module 16 is disconnected from the electrostatic adsorption plate 15, so that the dust collector 22 can suck the dust falling from the electrostatic adsorption plate 15, realizing the timely cleaning of the electrostatic adsorption plate 15, avoiding the problem of reducing the dust suction capacity of the local area of the electrostatic adsorption plate 15 caused by dust accumulation.

[0073] As another embodiment of the present application, an OLED display screen micro-point pollution defect detection method is also proposed, which adopts the polarized visual detection device and includes the following steps:

[0074] Step one, the screen to be detected is transferred to the horizontal table 2;

[0075] Step two, the power mechanism drives the vertical plate 6 to descend, so that the electrostatic adsorption plate 15 approaches the screen surface to adsorb dust, the two movable seats 5 move away from each other, the elastic mechanism drives the electrostatic adsorption plate 15 to deflect, and the collection mechanism removes the dust on the electrostatic adsorption plate 15;

[0076] Step three, the frame body 4 moves intermittently along the length direction of the horizontal table 2, and step two is repeated before each movement;

[0077] Step four, after the dust removal, the camera 24 collects the surface image of the screen;

[0078] Step five, the image information is analyzed to determine the pollution defect points on the screen surface.

[0079] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the foregoing description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be construed as limiting the claims to which they belong.

[0080] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

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; characterized in that 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. 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. 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. 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. 2.The device 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 device 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 OLED display screen micro-particle contamination defect polarized visual inspection device according to claim 3, characterized in that, A guide is fixed to the side of the frame. The pneumatic lifting structure 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 installed 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 OLED display screen micro-particle contamination defect polarized visual inspection device 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 device 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.

7. 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