An AOI inspection agency for polarizers

Abstract

This invention relates to the field of polarizer inspection equipment technology, and discloses an AOI inspection mechanism for polarizers, comprising a support assembly, a transmission unit and multiple inspection units on the support assembly, and a cleaning component on the support assembly. The transmission unit is used to transport polarizers, the multiple inspection units are used to perform multi-dimensional defect inspection on the polarizers, and the cleaning component is used to dynamically clean the conveyor belt of the transmission unit to eliminate interference from electrostatically adsorbed particles on the inspection. This invention, through the integrated design of multiple inspection units and synchronous linkage with the cleaning component, combined with the synergistic effect of the vacuum negative pressure box, the perforated conveyor belt, and the gap between the pressure rollers, fundamentally solves the problems of polarizer transport contamination, displacement, and false detection of electrostatically adsorbed particles on the conveyor belt caused by the single-function serial connection of existing equipment. This ensures that the polarizer remains stable and flat throughout the entire inspection process, and achieves dynamic cleanliness of the conveyor belt through reciprocating brushing and ion wind static removal.

Description

Technical Field

[0001] This invention relates to the field of polarizer inspection equipment technology, and more particularly to an AOI inspection mechanism for polarizers. Background Technology

[0002] As a core optical component of LCD panels, polarizers directly determine the final imaging quality and performance of LCD panels through several key parameters, including in-hole defects, front and back surface conditions, MARK dot alignment accuracy, surface bubbles and cracks, indentations, and unevenness. With the rapid iteration of display technologies such as high resolution and high refresh rates, downstream display panel manufacturers have increasingly stringent requirements for polarizer inspection. These requirements not only demand continuous improvement in inspection accuracy but also require comprehensive, multi-parameter inspection of polarizers. Automated Optical Inspection (AOI) technology, with its high efficiency and accuracy, has become a core technology for defect detection in polarizer production. Consequently, the industry has an urgent need for integrated polarizer AOI inspection mechanisms capable of incorporating multiple inspection functions.

[0003] Currently, existing polarizer AOI inspection equipment consists of single-function inspection structures, capable of detecting only one type of defect or parameter of the polarizer. There is no integrated polarizer AOI inspection mechanism that can detect internal defects, orientation, mark points, bubbles and cracks, indentations, and unevenness, thus failing to achieve one-stop comprehensive inspection of multiple key parameters of the polarizer. To achieve full-dimensional inspection of polarizers, multiple single-function inspection devices with different functions need to be used in series on the production line. This not only results in a lengthy production line layout and a significant increase in equipment purchase and maintenance costs, but also greatly increases the risk of secondary contamination and positional misalignment of the polarizer due to the multiple transfers between devices. This directly leads to a decrease in overall inspection accuracy and difficulty in improving inspection efficiency, making it unsuitable for the high-efficiency production rhythm of high-generation display panel production lines.

[0004] Both polarizer testing and production take place in cleanrooms. Even in this clean environment, the conveyor belt used to transport polarizers during testing generates static electricity due to friction with its own transmission components and the polarizers during long-term operation. Existing single-function polarizer testing equipment lacks any cleaning mechanisms for its conveyor belts, making it impossible to effectively treat the belt surface. This results in the conveyor belt surface easily adsorbing trace amounts of dust, adhesive residue, and other microparticles from the environment. These microparticles continuously adhere to the conveyor belt surface and move synchronously with it. When the polarizer passes the testing position, these microparticles on the conveyor belt surface interfere with the camera's field of view and can easily be misinterpreted by the camera as defects in the polarizer itself, significantly reducing the accuracy of the testing results. Furthermore, the adhering microparticles may come into contact with the polarizer surface during transport, causing secondary contamination and further affecting the reliability of the testing results. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing an AOI inspection mechanism for polarizers, enabling integrated inspection of multi-dimensional defects in polarizers, simultaneously cleaning the conveyor belt, resolving false detection issues caused by electrostatic adsorption of particles, improving inspection accuracy and efficiency, and reducing equipment maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An AOI inspection mechanism for polarizers includes a support assembly, on which a transmission unit and multiple inspection units are provided. The support assembly also includes a cleaning component. The transmission unit is used to transport the polarizer, the multiple inspection units are used to perform multi-dimensional defect inspection on the polarizer, and the cleaning component is used to dynamically clean the transmission belt of the transmission unit to eliminate interference from electrostatically adsorbed particles on the inspection.

[0007] Preferably, the plurality of detection units include detection unit one, detection unit two, detection unit three, detection unit four, detection unit five, and detection unit six. Detection unit one is used to detect defects inside the polarizer hole, detection unit two is used to detect the polarizer's front and back states, detection unit three is used to detect the polarizer's MARK point, detection unit four is used to detect bubbles and cracks in the polarizer, detection unit five is used to detect indentations in the polarizer, and detection unit six is ​​used to detect the polarizer's unevenness. This enables integrated detection of all-dimensional defects in the polarizer without the need for multiple single-function devices connected in series, significantly improving detection efficiency and avoiding contamination and displacement problems caused by multiple transfers of the polarizer.

[0008] Preferably, the support assembly includes a support body, on which are mounted supports one, two, three, four, five, and six. Detection unit one has a detection camera one mounted on support one; detection unit two has a detection camera two mounted on support two; detection unit three has a detection camera three mounted on support three; detection unit four has a detection camera four mounted on support four; detection unit five has a detection camera five mounted on support five; and detection unit six has a detection camera six mounted on support six. Below the transmission unit, there is also a camera light source assembly corresponding to each detection camera one-to-one. Each detection camera can adjust its installation height and angle according to its corresponding support, and with the dedicated camera light source assembly, it provides suitable illumination, ensuring image clarity in various detection scenarios and laying the foundation for accurate detection.

[0009] Preferably, the fourth detection unit further includes a vacuum negative pressure box, which is set in the middle space of the transmission belt of the transmission unit. It is used to adsorb the polarizer to ensure the flatness during detection. It can tightly adsorb the polarizer onto the surface of the transmission belt, avoiding false detection and missed detection of bubbles and cracks caused by wrinkles and warping of the polarizer, and greatly improving the accuracy of the detection item.

[0010] Preferably, the transmission unit includes transmission component one, transmission component two, transmission component three, and transmission component four. Transmission component one, transmission component two, and transmission component four are all double-row synchronous belt conveyors. The docking ends of transmission component one and transmission component two, transmission component two and transmission component three, and transmission component three and transmission component four are each provided with a set of pressure rollers. There is a gap between the two pressure rollers for the polarizer to pass through. The gap provides an unobstructed shooting and detection position for the detection camera. The double-row synchronous belt ensures that the polarizer is transmitted smoothly without deviation. The gap between the pressure rollers not only realizes the smooth docking of the polarizer between the various transmission components, but also provides an unobstructed field of view for the detection camera, avoiding interference from the transmission components during shooting.

[0011] Preferably, the first detection unit is disposed on the first transmission component, the second detection unit is disposed on the second transmission component, the third, fourth and fifth detection units are disposed on the third transmission component, and the sixth detection unit is disposed on the fourth transmission component. The detection units are arranged sequentially along the polarizer transmission path to achieve continuous multi-dimensional detection of the polarizer as it is transmitted, with no overlap or omission in the detection area, perfectly adapting to the rhythm of assembly line operation.

[0012] Preferably, there are multiple cleaning components, corresponding to transmission components one, two, three, and four respectively. Each cleaning component includes a fixed frame plate, a brush, an ion bar, a transmission component one, a control component, and a support component. The fixed frame plate is mounted on the bracket assembly, the ion bar is mounted on the fixed frame plate, and the air outlet corresponds to the contact area between the brush and the transmission belt. The transmission component one is used to drive the output shaft of the corresponding transmission component to the control component. The support component is mounted on the fixed frame plate and fixed below the transmission unit. The brush is slidably mounted on the support component. The control component is used to drive the brush to slide back and forth along the support component. Multiple cleaning components are adapted to the transmission components one by one, which can clean the transmission belt of each transmission section in a targeted manner. The ion bar and the brush work together to achieve the dual effect of brushing off particles and eliminating static electricity, preventing particles from sticking back due to static electricity.

[0013] Preferably, the control component includes a first rotating shaft, a second rotating shaft, and a third rotating shaft. One end of the first rotating shaft is connected to a first transmission assembly, and the other end is provided with a bevel gear set, which is connected to one end of the second rotating shaft via the bevel gear set. Both the second and third rotating shafts are rotatably mounted on a fixed frame plate. The other end of the second rotating shaft is provided with a second transmission assembly, which is connected to the third rotating shaft via the second transmission assembly. The upper end of the third rotating shaft is provided with a rotating plate, and a control rod is eccentrically mounted on the rotating plate. The bevel gear set enables vertical conversion of the power direction, which, in conjunction with the second transmission assembly, completes the power transmission. The eccentric control rod can convert the rotational motion of the rotating shaft into the reciprocating linear motion of the brush, resulting in smooth power transmission and a tight transmission structure.

[0014] Preferably, the support member includes two symmetrically arranged support plates, and two parallel support rods are fixedly arranged between the two support plates. The brush removal component includes a movable plate, a row of brushes is fixed above the movable plate, and a protruding end corresponding to the control rod is provided below the movable plate. The protruding end is provided with a limiting groove, and the control rod is located in the limiting groove. A mating block is also symmetrically arranged below the movable plate. The mating block is provided with a through hole, and the mating block is slidably arranged on the support rod through the through hole. A ball bearing sleeve is provided in the through hole to achieve sliding engagement. The ball bearing sleeve greatly reduces the sliding resistance between the brush removal component and the support rod, ensuring that the brush removal component slides smoothly without jamming. The brushes flexibly contact the surface of the conveyor belt, avoiding damage to the conveyor belt while cleaning particles.

[0015] Preferably, the multiple cleaning components are connected to the rotating main shafts of the corresponding transmission components 1, 2, 3, and 4 through their own transmission components 1. The cleaning components are directly driven by the power of the transmission components themselves, without the need for additional drive components. This achieves synchronous linkage between the cleaning action and the operation of the transmission belt, which can promptly remove particles from the transmission belt and prevent particles from interfering with subsequent detection.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention, through the integrated design of multiple detection units and synchronous linkage of cleaning components, combined with the synergistic effect of the vacuum negative pressure box, perforated conveyor belt, and pressure roller gap, fundamentally solves the problems of polarizer transport contamination, misalignment, and false detection of particles adsorbed by electrostatic adsorption on the conveyor belt caused by the single-function serial connection of existing equipment. It ensures that the polarizer remains stable and flat throughout the entire detection process. At the same time, the dual cleaning of reciprocating brushing and ion wind static elimination achieves dynamic cleanliness of the conveyor belt. The detection dimensions are comprehensive, the accuracy is high, and the effect is stable. It is fully adapted to the multi-dimensional and high-precision detection requirements of polarizers for high-generation display panels, effectively reducing equipment purchase and maintenance costs, product loss, and customer quality complaints. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a view showing the positions of each detection unit and each transmission component of the present invention; Figure 3 This is a structural view of the detection unit of the present invention; Figure 4 This is a view showing the connection between the cleaning component and the rotating spindle drive on the transmission unit of the present invention; Figure 5 This is a structural view of the cleaning component of the present invention; Figure 6 This is another structural view of the cleaning component of the present invention; Figure 7 This is an exploded view of the cleaning component structure of the present invention; Figure 8 This is a view of the lower structure of the movable plate of the present invention; Figure 9 A view showing the structure of a collection cover on the movable plate of the present invention.

[0019] Drawing number explanation: 1. Support assembly; 11. Support 1; 12. Support 2; 13. Support 3; 14. Support 4; 15. Support 5; 16. Support 6; 2. Transmission unit; 21. Transmission assembly 1; 22. Transmission assembly 2; 23. Transmission assembly 3; 24. Transmission assembly 4; 3. Detection unit 1; 31. Detection camera 1; 4. Detection unit 2; 41. Detection camera 2; 5. Detection unit 3; 51. Detection camera 3; 6. Detection unit 4; 61. Detection camera 4; 62. Vacuum negative pressure box; 7. Detection unit 5; 71 8. Detection unit 6; 9. Detection camera 6; 10. Cleaning component; 11. Transmission assembly 1; 12. Control component; 13. Rotating shaft 1; 14. Bevel gear assembly; 15. Rotating shaft 2; 16. Transmission assembly 2; 17. Rotating shaft 3; 18. Rotating plate; 19. Control rod; 20. Fixed frame plate; 21. Brush component; 22. Moving plate; 23. Brush; 24. Limiting groove; 25. Mating block; 26. Ionizing air bar; 37. Support component; 48. Support plate; 59. Support rod; 60. Collection cover. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0022] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0023] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0024] Example: Please see Figure 1-9An AOI inspection mechanism for polarizers includes a support assembly 1, a transmission unit 2, a first inspection unit 3, a second inspection unit 4, a third inspection unit 5, a fourth inspection unit 6, a fifth inspection unit 7, a sixth inspection unit 8, and a cleaning component 9. The components work together to achieve multi-dimensional integrated inspection of the polarizer and synchronous cleaning of the transmission belt.

[0025] The support assembly 1 is the installation foundation of the entire testing mechanism, including the support body. The support body is made of rigid material and can provide stable support for the transmission unit 2, each testing unit and cleaning component 9, adapting to the long-term operation requirements in industrial production. The support body is integrally formed or detachably installed with support one 11, support two 12, support three 13, support four 14, support five 15 and support six 16. The six supports correspond to the installation of the testing cameras of the six testing units. Their installation height and angle can be adjusted according to the testing requirements to ensure that the testing camera can be aligned with the corresponding testing area of ​​the polarizer, ensuring the accuracy of the testing.

[0026] The transmission unit 2 is installed on the support body of the support assembly 1 to realize the continuous and stable transport of the polarizer. It includes transmission assembly 1 21, transmission assembly 22, transmission assembly 3 23 and transmission assembly 4 24. The four transmission assemblies are connected in sequence to form a complete transmission path. Transmission assembly 1 21, transmission assembly 22 and transmission assembly 4 24 all adopt double-row synchronous belt conveyor. The double-row synchronous belt structure can improve the stability of the transmission and avoid problems such as offset and wrinkles of the polarizer during the transmission process, which is suitable for the precision testing requirements of the polarizer.

[0027] At the docking ends of transmission component 1 21 and transmission component 22, transmission component 22 and transmission component 3 23, and transmission component 3 23 and transmission component 4 24, a set of pressure rollers is provided. Each set of pressure rollers includes two rollers arranged opposite each other, and a gap is formed between the two rollers to allow the polarizer to pass through. This gap not only helps the polarizer to smoothly transition to the next transmission component and avoids jamming at the docking point, but also provides an unobstructed shooting and detection position for the detection camera at the corresponding position, avoiding the transmission belt, rollers and other transmission components from obstructing the shooting field of the detection camera, and ensuring that the detection camera can clearly capture the detection area of ​​the polarizer.

[0028] Below the transmission unit 2, there are also camera light source components corresponding to each of the detection cameras 31, 41, 51, 61, 71, and 81. Each camera light source component corresponds to a detection position and can provide appropriate light intensity and angle according to the detection requirements of the corresponding detection unit. For example, it provides penetrating light when detecting defects inside holes and reflective light when detecting surface bubbles and cracks, ensuring that the images captured by the detection cameras are clear and providing a reliable basis for defect identification.

[0029] The detection unit of the present invention includes six independent detection units, which respectively realize multi-dimensional defect detection of polarizer. Each detection unit is installed on the bracket assembly 1 and is set in accordance with the transmission path of the transmission unit 2 to ensure that each detection can be completed in sequence during the transmission of polarizer.

[0030] The detection unit 3 is set on the transmission component 21 and has a detection camera 31. The detection camera 31 is fixedly installed above the transmission component 21 by the bracket 11. Its lens is aimed at the polarizer on the transmission component 21 and is used to detect defects in the holes of the polarizer. It can identify problems such as blockage, damage, and dimensional deviation of the preset holes on the polarizer.

[0031] The detection unit 2 4 is set on the transmission component 2 22 and has a detection camera 2 41. The detection camera 2 41 is fixedly installed above the transmission component 2 22 by the bracket 2 12. It is used to detect the positive and negative state of the polarizer. By identifying the preset marks or optical characteristics on the surface of the polarizer, it determines whether the placement direction of the polarizer is correct, so as to prevent the polarizer placed in the opposite direction from entering the subsequent process.

[0032] The detection unit 3 5 is set on the transmission component 3 23 and has a detection camera 3 51. The detection camera 3 51 is fixedly installed above the transmission component 3 23 by the bracket 3 13. It is used to detect the MARK point of the polarizer, identify the position deviation of the positioning MARK point on the polarizer, provide a basis for the positioning of subsequent processes, and avoid positioning errors caused by blurry or missing MARK points.

[0033] Detection unit 4 6 is located on transmission component 3 23, downstream of detection unit 3 5. It has detection camera 4 61 and vacuum negative pressure box 62. Detection camera 4 61 is fixedly installed above transmission component 3 23 by bracket 4 14 and is used to detect bubbles and cracks in polarizer. Vacuum negative pressure box 62 is located in the middle space of the transmission belt of transmission component 3 23, directly below detection camera 4 61. It can generate negative pressure adsorption force to tightly adsorb the polarizer transmitted to this position onto the transmission belt, ensuring that the polarizer is in a flat state during detection and avoiding misjudgment or missed detection of bubbles and cracks caused by wrinkles in the polarizer. Therefore, the transmission belt of transmission component 3 23 has holes to ensure that the polarizer is adsorbed onto the transmission belt by negative pressure.

[0034] The detection unit 5 7 is located on the transmission component 3 23, downstream of the detection unit 4 6, and has a detection camera 5 71. The detection camera 5 71 is fixedly installed above the transmission component 3 23 by the bracket 5 15. It is used to detect the indentation of the polarizer and can identify indentation defects such as dents and scratches caused by extrusion on the surface of the polarizer, so as to avoid the indentation affecting the optical performance of the polarizer.

[0035] The detection unit 6 8 is set on the transmission component 4 24 and has a detection camera 6 81. The detection camera 6 81 is fixedly installed above the transmission component 4 24 by the bracket 6 16. It is used to detect the concavity and convexity of the polarizer and determine whether there are any flatness problems such as protrusions or depressions on the surface of the polarizer, so as to ensure that the polarizer has uniform thickness and flat surface, and meets the assembly requirements of the downstream display panel.

[0036] Each inspection unit's camera is electrically connected to an external control module, enabling it to transmit captured images to the control module. The control module uses a preset image recognition algorithm to determine defects, achieving automated inspection. It can also output corresponding control signals based on the inspection results, such as filtering out unqualified products and diverting them.

[0037] There are multiple cleaning components 9, which are respectively set for transmission components 1 21, 22, 3, and 4. Each cleaning component 9 has the same structure, including a fixed frame plate 93, a brush 94, an ion air bar 95, a transmission component 1 91, a control component 92, and a support component 96. They are used to dynamically and synchronously clean the transmission belts of the corresponding transmission components to eliminate interference from electrostatically adsorbed particles. Each cleaning component 9 is equipped with a blower at the bottom. The dust brushed off is drawn away by the blower. After the dust is filtered by the filter element in the prior art, the clean air can be directly discharged, effectively avoiding dust diffusion and pollution of the cleanroom environment.

[0038] The fixed frame plate 93 is made of rigid material and can be detachably installed on the support body of the support assembly 1. It is located below the corresponding transmission assembly and provides installation support for the other parts of the cleaning component 9, which facilitates subsequent maintenance and replacement.

[0039] The support member 96 is installed on the fixed frame plate 93 and includes two symmetrically arranged support plates 961. The two support plates 961 are vertically fixed to both ends of the fixed frame plate 93. Two parallel support rods 962 are fixedly connected between the two support plates 961. The support rods 962 are made of smooth material and provide guidance for the sliding of the brush 94.

[0040] The brush removal component 94 includes a movable plate 941, brushes 942, and mating blocks 944. The movable plate 941 is horizontally positioned, with a row of brushes 942 fixed on its top. The brushes 942 are made of flexible conductive material, allowing them to flexibly contact the surface of the conveyor belt to avoid damage to the conveyor belt, while also assisting in the conduction of static electricity. The movable plate 941 has a protruding end at its bottom, with a limiting groove 943 for engaging with the control rod 927 of the control component 92. Two mating blocks 944 are also symmetrically fixed at the bottom of the movable plate 941. Each mating block 944 has two through holes, in which ball bearing sleeves are installed. The mating blocks 944 are slidably fitted onto the support rod 962 through the engagement of the through holes and the ball bearing sleeves, allowing the movable plate 941 to slide smoothly back and forth along the support rod 962. The ball bearing sleeves reduce sliding resistance and prevent jamming during sliding.

[0041] The control component 92 is used to drive the brush component 94 to slide back and forth along the support rod 962, and includes a first rotating shaft 921, a bevel gear set 922, a second rotating shaft 923, a second transmission assembly 924, a third rotating shaft 925, a rotating plate 926, and a control rod 927. A rotating shaft 921 is rotatably mounted on a bracket assembly 1, with one end connected to a transmission assembly 91 and the other end fixedly connected to a bevel gear of a bevel gear set 922. The other bevel gear of the bevel gear set 922 is fixedly connected to one end of a rotating shaft 923. The rotating shaft 923 is vertically rotatably mounted on a fixed frame plate 93 to achieve a vertical conversion of the power direction. The other end of the rotating shaft 923 is connected to a transmission assembly 924, and the other end of the transmission assembly 924 is connected to a rotating shaft 925. The rotating shaft 925 is vertically rotatably mounted on a fixed frame plate 93 and is located between two support rods 962. A rotating plate 926 is fixedly mounted on the upper end of the rotating shaft 925. A control rod 927 is eccentrically fixed to the upper surface of the rotating plate 926 and is embedded in the limiting groove 943 of the brush remover 94, allowing it to rotate and slide freely within the limiting groove 943.

[0042] The transmission component 91 adopts any one of gear transmission, chain transmission or belt transmission. One end of it is connected to the rotating main shaft of the corresponding transmission component, and the other end is connected to the rotating shaft 921. It is used to transmit the power of the transmission component to the control component 92 to realize the synchronous linkage between the cleaning action and the operation of the transmission belt.

[0043] The ion air bar 95 is fixedly installed on the fixed frame plate 93, located on one side of the brush removal component 94. Its air outlet is aligned with the contact area between the brush 942 of the brush removal component 94 and the conveyor belt. The ion air bar 95 is connected to an external low-voltage power supply module and can generate ion air to eliminate static electricity on the surface of the conveyor belt, preventing microparticles from being statically attracted to the surface of the conveyor belt. At the same time, it helps the microparticles brushed off by the brush 942 to detach from the conveyor belt, thereby improving the cleaning effect.

[0044] The working process of cleaning component 9: When the transmission component is running, its rotating main shaft drives rotating shaft 921 to rotate via transmission component 1 91. Rotating shaft 921 drives rotating shaft 923 to rotate via bevel gear group 922. Rotating shaft 923 drives rotating shaft 925 to rotate via transmission component 2 924. Rotating shaft 925 drives rotating plate 926 to rotate synchronously. Since the control rod 927 is eccentrically set on rotating plate 926, when rotating plate 926 rotates, it drives control rod 927 to perform circumferential motion. Control rod 927 moves in the limiting groove 943 and pushes moving plate 941 to slide back and forth along support rod 962, thereby driving brush 942 to contact the surface of the transmission belt and perform reciprocating brushing action to remove microparticles from the surface of the transmission belt. At the same time, ion wind bar 95 continuously blows ion wind to the contact area between brush 942 and transmission belt to eliminate static electricity on the surface of the transmission belt and prevent microparticles from being re-adsorbed on the surface of the transmission belt. The brushed microparticles can be collected through a preset collection structure, such as... Figure 9 The movable plate 941 is equipped with a collection hood 10. One side of the collection hood 10 is connected to a blower through a flexible pipe. The blower can suck away the micro particles, and after being filtered by the filter element of the existing technology, the clean air is discharged. The dust is collected and filtered, thereby avoiding pollution of the cleanroom environment.

[0045] When the polarizer AOI inspection mechanism of the present invention is working, the transmission unit 2 and each cleaning component 9 are started first. Transmission component 1 21, transmission component 22, transmission component 3 23 and transmission component 4 24 operate synchronously, driving the polarizer to move along the transmission path. At the same time, the rotating main shaft of each transmission component drives the control component 92 of the corresponding cleaning component 9 through the transmission component 1 91, driving the brush 94 to slide back and forth. The brush 942 brushes and cleans the surface of the transmission belt. The ion wind bar 95 blows out ion wind to eliminate static electricity, realizing synchronous dynamic cleaning of the transmission belt. The dust brushed off is drawn away by the blower and discharged after being filtered by the filter element of the prior art.

[0046] The polarizer first enters transmission assembly 21, where the inspection camera 31 of inspection unit 3 takes a picture of it to detect defects inside the aperture. The camera's light source assembly simultaneously provides appropriate illumination. The polarizer then passes through the gap between the pressure rollers into transmission assembly 22, where the inspection camera 41 of inspection unit 4 detects its orientation. Next, the polarizer enters transmission assembly 23, passing sequentially through inspection units 5, 6, and 7, where it is inspected for marks, bubbles and cracks, and indentations. The vacuum negative pressure chamber of inspection unit 6... The polarizer is adsorbed at 62 to ensure flatness during inspection. Finally, the polarizer enters the transmission assembly 424. The inspection camera 681 of the inspection unit 68 detects the unevenness of the polarizer, completing all inspection procedures. The inspection cameras of each inspection unit transmit the captured images to the external control module. The control module completes defect identification and judgment, and outputs the inspection results. At the same time, unqualified polarizers can be separated by subsequent diversion structure. Each cleaning component 9 continuously cleans the transmission belt to avoid misjudgment caused by microparticle adsorption, ensuring the stability and accuracy of the entire inspection process.

[0047] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. An AOI inspection mechanism for polarizers, characterized in that, The device includes a support assembly (1), on which a transmission unit (2) and multiple detection units are provided. The support assembly (1) is also provided with a cleaning component (9). The transmission unit (2) is used to transport a polarizer. The multiple detection units are used to perform multi-dimensional defect detection on the polarizer. The cleaning component (9) is used to dynamically clean the transmission belt of the transmission unit (2) to eliminate the interference of electrostatically adsorbed particles on the detection.

2. The AOI inspection mechanism for a polarizer according to claim 1, characterized in that, The plurality of detection units include detection unit one (3), detection unit two (4), detection unit three (5), detection unit four (6), detection unit five (7) and detection unit six (8). Detection unit one (3) is used to detect defects inside the polarizer hole. Detection unit two (4) is used to detect the polarizer's positive and negative states. Detection unit three (5) is used to detect the polarizer's MARK point. Detection unit four (6) is used to detect bubbles and cracks in the polarizer. Detection unit five (7) is used to detect indentations in the polarizer. Detection unit six (8) is used to detect the polarizer's unevenness.

3. The AOI inspection mechanism for a polarizer according to claim 2, characterized in that, The support assembly (1) includes a support body, on which are provided a first support (11), a second support (12), a third support (13), a fourth support (14), a fifth support (15), and a sixth support (16). The first detection unit (3) has a first detection camera (31), which is mounted on the first support (11). The second detection unit (4) has a second detection camera (41), which is mounted on the second support (12). The third detection unit (5) The system includes a detection camera three (51) mounted on the bracket three (13), a detection unit four (6) with a detection camera four (61) mounted on the bracket four (14), a detection unit five (7) with a detection camera five (71) mounted on the bracket five (15), and a detection unit six (8) with a detection camera six (81) mounted on the bracket six (16). Below the transmission unit (2) is a camera light source assembly corresponding to each detection camera (31).

4. The AOI inspection mechanism for a polarizer according to claim 3, characterized in that, The detection unit four (6) also includes a vacuum negative pressure box (62), which is set in the middle space of the transmission belt of the transmission unit (2) to adsorb the polarizer to ensure flatness during detection.

5. The AOI inspection mechanism for a polarizer according to claim 3, characterized in that, The transmission unit (2) includes transmission component one (21), transmission component two (22), transmission component three (23) and transmission component four (24). Transmission component one (21), transmission component two (22) and transmission component four (24) are all double-row synchronous belt conveyors. The docking ends of transmission component one (21) and transmission component two (22), transmission component two (22) and transmission component three (23), and transmission component three (23) and transmission component four (24) are all provided with a set of pressure rollers. There is a gap between the two pressure rollers for the polarizer to pass through. The gap provides an unobstructed shooting detection position for the detection camera.

6. The AOI inspection mechanism for a polarizer according to claim 5, characterized in that, The detection unit 1 (3) is disposed on the transmission component 1 (21), the detection unit 2 (4) is disposed on the transmission component 2 (22), the detection unit 3 (5), the detection unit 4 (6) and the detection unit 5 (7) are disposed on the transmission component 3 (23), and the detection unit 6 (8) is disposed on the transmission component 4 (24).

7. The AOI inspection mechanism for a polarizer according to claim 1, characterized in that, The cleaning component (9) is multiple, and is respectively set for transmission component one (21), transmission component two (22), transmission component three (23), and transmission component four (24); Each of the cleaning components (9) includes a fixed frame plate (93), a brush (94), an ion air bar (95), a transmission assembly (91), a control component (92), and a support component (96). The fixed frame plate (93) is mounted on the bracket assembly (1), and the ion air bar (95) is disposed on the fixed frame plate (93), with the air outlet corresponding to the contact area between the brush (94) and the conveyor belt. The transmission component (91) is used to drive the output shaft of the corresponding transmission component to the control component (92). The support component (96) is set on the fixed frame plate (93) and fixed below the transmission unit (2). The brush removal component (94) is slidably set on the support component (96). The control component (92) is used to drive the brush removal component (94) to slide back and forth along the support component (96).

8. The AOI inspection mechanism for a polarizer according to claim 7, characterized in that, The control component (92) includes a first rotating shaft (921), a second rotating shaft (923), and a third rotating shaft (925). One end of the first rotating shaft (921) is connected to a first transmission assembly (91), and the other end is provided with a bevel gear set (922), which is connected to one end of the second rotating shaft (923) through the bevel gear set (922). Both the second rotating shaft (923) and the third rotating shaft (925) are rotatably mounted on the fixed frame plate (93). The other end of the second rotating shaft (923) is provided with a transmission component (924), which is connected to the third rotating shaft (925) through the transmission component (924). The upper end of the third rotating shaft (925) is provided with a rotating plate (926), and a control rod (927) is eccentrically provided on the rotating plate (926).

9. The AOI inspection mechanism for a polarizer according to claim 8, characterized in that, The support member (96) includes two symmetrically arranged support plates (961), and two parallel support rods (962) are fixed between the two support plates (961). The brush removal member (94) includes a movable plate (941), a row of brushes (942) is fixed above the movable plate (941), and a protruding end corresponding to the control rod (927) is provided below the movable plate (941). A limiting groove (943) is provided on the protruding end, and the control rod (927) is located in the limiting groove (943). A mating block (944) is also symmetrically arranged below the movable plate (941). A through hole is provided on the mating block (944), and the mating block (944) is slidably arranged on the support rod (962) through the through hole. A ball bearing sleeve is provided in the through hole to achieve sliding fit.

10. The AOI inspection mechanism for a polarizer according to claim 5, characterized in that, Multiple cleaning components (9) are connected to the rotating spindles of corresponding transmission components (21), (22), (23), and (24) through their own transmission components (91).

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