Liquid crystal module ACF interconnection automatic optical detection system and method based on high-precision image recognition

Abstract

The liquid crystal module ACF interconnection automatic optical detection system based on high-precision image recognition comprises a mounting frame, a conveying belt is fixedly mounted at the top of the mounting frame, and a guide assembly used for guiding a liquid crystal module is arranged at the feeding end of the conveying belt; a visual detection assembly used for detecting the ACF interconnection position of the liquid crystal module is arranged in the middle of the conveying belt, a moving-out assembly used for moving out the defective liquid crystal module is arranged at the top of the discharging end of the conveying belt, and a control assembly used for controlling the conveying belt and the moving-out assembly is arranged on the front side face of the conveying belt. Through the arrangement of the conveying belt, the guide assembly, the visual detection assembly, the moving-out assembly and the control assembly, the complete liquid crystal module detection and processing system is formed, all links from feeding to discharging are in close fit, the automation degree and efficiency of liquid crystal module detection are effectively improved, the product quality is guaranteed, and manual intervention and errors are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical detection systems, and in particular relates to an automatic optical detection system and method for ACF interconnection of a liquid crystal module based on high-precision image recognition. Background Art

[0002] Liquid crystal module ACF interconnection refers to a technology that uses anisotropic conductive film to achieve electrical connection between different components during the manufacturing process of liquid crystal display modules. It can effectively avoid short circuit problems between different signal lines while achieving electrical connection, ensure accurate signal transmission between various components in the liquid crystal module, and tightly connect various components together to form a stable overall structure.

[0003] In the existing inspection of ACF interconnection of liquid crystal modules, most of them rely on the inspection personnel to directly observe the appearance of the ACF interconnection with the naked eye or with the help of a magnifying glass or a microscope. However, the inspection efficiency is low, it is difficult to meet the needs of large-scale and rapid inspection, and the labor cost is high. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic optical inspection system for ACF interconnection of liquid crystal modules based on high-precision image recognition, so as to solve the technical defects mentioned in the background technology that the inspection of ACF interconnection of existing liquid crystal modules mostly relies on manual inspection by inspectors, has low inspection efficiency, is difficult to meet the needs of large-scale rapid inspection, and has high labor costs.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An automatic optical inspection system for ACF interconnection of a liquid crystal module based on high-precision image recognition comprises a mounting frame, a conveyor belt is fixedly mounted on the top of the mounting frame, a guide component for guiding the liquid crystal module is arranged at the feeding end of the conveyor belt, a visual inspection component for inspecting the ACF interconnection of the liquid crystal module is arranged in the middle of the conveyor belt, a removal component for removing a defective liquid crystal module is arranged at the top of the discharging end of the conveyor belt, and a control component for controlling the conveyor belt and the removal component is arranged on the front side of the conveyor belt.

[0007] As a further scheme of the present invention, the guide assembly includes limit baffles respectively arranged on the inner walls of the side ribs on both sides of the feed end of the conveyor belt, and the right end of the two groups of limit baffles is provided with a notch, and the inside of the two groups of notches are respectively fixedly connected with connecting rods, and the surfaces of the two groups of connecting rods are rotatably sleeved with connecting rings, one side of the two groups of connecting rings are respectively fixedly connected to the inner walls of the corresponding side ribs of the conveyor belt, and the other ends of the two groups of limit baffles are respectively connected to the first push rods through rotating connecting pieces, and one end of the two groups of first push rods respectively penetrates the corresponding side ribs of the conveyor belt, and both sides of the conveyor belt are provided with fixing parts for fixing the first push rods.

[0008] The visual inspection component includes a fixed plate fixedly installed on the top of the conveyor belt guard, a mounting seat is fixedly inserted on the top of the right side of the fixed plate, a fixing ring is connected to the right side of the mounting seat through a displacement piece, a camera is arranged in the inner cavity of the fixing ring, a limit piece is arranged on the top of the fixing ring to prevent the camera from falling out, and a lighting component is arranged on the right side of the fixed plate.

[0009] The lighting assembly comprises lighting lamps arranged at two ends of the right side of the fixing plate, and both groups of lighting lamps are connected to the corresponding side surfaces of the fixing plate through mounting parts.

[0010] The removal component includes a support plate fixedly installed on the top of the retaining edge on one side of the feeding end of the conveyor belt, one side of the support plate is fixedly connected to a limiting plate, the other end of the limiting plate extends upward to the other side of the conveyor belt, one side of the limiting plate is provided with a mounting plate, the top of the mounting plate is fixedly connected with an electric push rod, the telescopic end of the electric push rod penetrates downwardly through the mounting plate and is fixedly connected with a pneumatic suction cup for adsorbing the liquid crystal module, the other side surface of the conveyor belt is fixedly connected with a placement box, a limiting groove is provided inside the limiting plate, and a pushing component is provided inside the limiting groove for pushing the mounting plate toward the other side to move the pneumatic suction cup for adsorbing the liquid crystal module to the top of the placement box.

[0011] The control component includes a mounting plate and a carrier plate fixedly mounted on the surface of one side of the mounting frame, a controller is fixedly connected to the surface of the mounting plate, a workstation is placed on the top of the carrier plate, a laser sensor is embedded in the inner wall of one side of the conveyor belt and at a position corresponding to the pneumatic suction cup, the signal output end of the laser sensor is electrically connected to the signal input end of the controller through a wire, the signal output end of the controller is electrically connected to the signal input end of the workstation through a wire, and the signal output end of the camera is electrically connected to the signal input end of the workstation through a wire.

[0012] The workstation is integrated with an image recognition module for recognizing pictures input into the workstation by a camera.

[0013] As a further solution of the present invention, the displacement member includes a sliding groove opened on the right side surface of the mounting seat, the middle part of the sliding groove is rotatably connected to a second vertically arranged lead screw, a second servo motor is fixedly installed on the top of the mounting seat, the output shaft of the second servo motor extends downward and is connected to one end of the second lead screw through a coupling, the surface of the second lead screw is threadedly connected to a second nut seat, one side of the fixing ring is fixedly connected to the surface of the second nut seat, and the signal input end of the second servo motor is electrically connected to the signal output end of the controller through a wire.

[0014] As a further solution of the present invention, the pushing component includes a first servo motor fixedly connected to the outer side of the support plate, the output shaft of the first servo motor extends toward the inner cavity of the limiting groove, the output shaft of the first servo motor is connected to the first lead screw through a coupling, the other end of the first lead screw is sleeved with a bearing, the bearing is embedded in the corresponding side surface of the limiting plate, the surface of the first lead screw is threadedly connected to the first nut seat, one side of the first nut seat is fixedly connected to a connecting plate, the connecting plate is slidably connected to the mouth of the limiting groove, the other end of the connecting plate is fixedly connected to the surface of the mounting disk, and the signal input end of the first servo motor is electrically connected to the signal output end of the controller through a wire.

[0015] As a further solution of the present invention, the mounting parts include circular rings respectively fixed at both ends of the right side of the plate, the inner cavities of the two groups of circular rings are rotatably inserted with fixing rods, one ends of the two groups of fixing rods are respectively fixedly connected to the surface of the corresponding side lighting lamps, the tops of the two groups of circular rings are respectively threaded with first bolts, and the two groups of first bolts are respectively threaded downward through the circular rings and abut against the surface of the corresponding side fixing rods.

[0016] As a further solution of the present invention, the rotating connecting member includes a C-shaped frame fixedly installed on the opposite ends of the two groups of first push rods, and the top of the left end of the two groups of limit baffles are provided with limit holes set along the length. The inner cavities of the two groups of limit holes are respectively provided with limit rods, and the upper and lower ends of the two groups of limit rods are respectively fixedly connected to the upper and lower inner walls of the corresponding side C-shaped frames.

[0017] As a further solution of the present invention, the fixing device includes limiting rings fixedly installed on both sides of the conveyor belt and at positions corresponding to the outer cylindrical surface of the first push rod. The tops of the two groups of limiting rings are respectively threadedly connected with hand bolts, and the two groups of hand bolts are respectively threaded downward and abut against the surface of the first push rod on the corresponding side.

[0018] As a further solution of the present invention, a groove is provided on one side surface of the first push rod, and a scale line is provided in the inner cavity of the groove.

[0019] As a further solution of the present invention, the limiting member includes two groups of mounting rings at the top left side of the fixing ring, the inner rings of the two groups of mounting rings are rotatably plugged with round rods, limiting strips are arranged in the middle of the two groups of mounting rings, the two groups of round rods are respectively fixedly installed on the surface of the limiting strips, the right end of the limiting strips extends to the top right side of the fixing ring, the right end of the limiting strips is fixedly connected with a snap-in piece, a snap-in groove is provided at the top right side of the fixing ring and at a position corresponding to the snap-in piece, and the snap-in piece is snapped into the inner cavity of the snap-in groove.

[0020] The present invention also provides a detection method of a liquid crystal module ACF interconnection automatic optical detection system based on high-precision image recognition, comprising the following steps:

[0021] S1: One end of the limit baffle is connected to the inner wall of the conveyor belt rib through a limit rod and a connecting ring, and the other end is connected to the first push rod by means of a rotating connecting piece. The first push rod passes through the conveyor belt rib, and its position is fixed by tightening the hand-tightened bolt threaded through the limit ring and abutting against the surface of the first push rod. At the same time, the scale line in the groove on one side of the first push rod is checked. The operator can accurately adjust the position of the first push rod and then determine the position of the limit baffle to adapt it to the LCD module to be detected and guide the LCD module to accurately enter the middle area of ​​the conveyor belt.

[0022] S2: With the operation of the conveyor belt, the LCD module is conveyed to the position of the visual inspection component in the middle. At this time, the controller controls the second servo motor to start according to the preset instructions. The second servo motor drives the second lead screw connected to it to rotate in the sliding groove, and then drives the second nut seat to make vertical linear motion along the sliding groove. The fixed ring fixedly connected to it and the camera in the inner cavity of the fixed ring also move up and down accordingly. The height of the camera is adjusted to a suitable height, and the image of the ACF interconnection of the LCD module is collected. The lighting is turned on to provide good lighting conditions for the camera to ensure that the camera can clearly capture the appearance of the ACF interconnection of the LCD module and other image information.

[0023] S3: The image data collected by the camera will be transmitted in real time through wires to the image recognition module integrated in the workstation. The module uses its built-in multiple visual algorithms to pre-process the image, such as removing noise and enhancing contrast, and then extract image features. It then analyzes whether there are defects in the ACF interconnection of the LCD module based on preset judgment criteria, and feeds back the recognition results to the controller.

[0024] S4: If the image recognition module determines that a certain LCD module has a defect, when the LCD module continues to be conveyed forward along the conveyor belt to near the top of the discharge end, the removal component on the support plate at the top of the sidewall on the feed end of the conveyor belt starts to operate. After the laser sensor embedded in the inner wall of the sidewall on one side of the conveyor belt detects that the defective LCD module has arrived at the corresponding position, it will transmit the detection signal to the controller to trigger the subsequent removal action.

[0025] S5: The controller controls the telescopic end of the electric push rod to extend downward, so that the pneumatic suction cup contacts and absorbs the defective LCD module, and then the electric push rod moves upward with the absorbed LCD module. Next, the controller controls the first servo motor to start, and the output shaft of the first servo motor drives the first lead screw to rotate. The first nut seat threaded on the surface of the first lead screw moves to the other side along the limit groove. Since the first nut seat is fixedly connected to the mounting plate through the connecting plate, the pneumatic suction cup that absorbs the LCD module is driven to move to the other side together, and the pneumatic suction cup that absorbs the defective LCD module is moved to the top of the placement box. Then the electric push rod extends again to place the LCD module in the placement box, completing the removal operation of the defective LCD module, so that the qualified LCD module can continue to be conveyed forward along the conveyor belt, thereby realizing effective detection of the LCD module and separation of defective products.

[0026] Compared with the prior art, the liquid crystal module ACF interconnection automatic optical detection system based on high-precision image recognition provided by the present invention has the following beneficial effects:

[0027] 1. The inspection system, through the conveyor belt, is equipped with guide components, visual inspection components, removal components and control components to form a complete LCD module inspection and processing system. From feeding to discharging, each link works closely together, which can effectively improve the automation and efficiency of LCD module inspection, ensure product quality, and reduce manual intervention and errors.

[0028] 2. The system is equipped with visual inspection components and camera equipment to collect images of the ACF interconnection of the LCD module, clearly capturing the detailed features of the part, thereby accurately detecting various defects such as cracks, bubbles, short circuits, and open circuits. At the same time, there is no need for direct human intervention in the inspection process, which greatly improves the inspection efficiency and reduces labor costs. It can also perform inspection work stably and avoid false detection problems caused by manual inspection.

[0029] 3. The system, through the setting of the removal component, the support plate, the limit plate, the mounting plate, the electric push rod and the pneumatic suction cup structure, cooperates with the pushing component in the limit groove. After detecting the defective LCD module, it can accurately and efficiently remove it from the conveyor belt and place it in the placement box, so as to realize the automatic separation of defective products, avoid the defective products from mixing with qualified products, improve the product qualification rate, and greatly reduce the cost compared with the use of robotic arms. At the same time, the technology of electric push rods and pneumatic suction cups is relatively mature, so it has a lower failure rate. At the same time, the simple structure is convenient for operators to repair and maintain.

[0030] 4. The system controls the components through the setting. The controller, workstation and laser sensor in the control components cooperate with each other. The controller receives the laser sensor signal and exchanges information with the workstation. According to the results of the image recognition module, the conveyor belt and the removal component are precisely controlled to realize the automation and intelligent coordination of the detection process and ensure the stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only examples of the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the opening position of the limiting hole in an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the internal structure of the sliding groove in the embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the opening position of the clamping slot in an embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the pneumatic suction cup in an embodiment of the present invention;

[0037] Figure 6 Schematic diagram of the internal structure of the limiting groove in the embodiment of the present invention;

[0038] Figure 7 Schematic diagram of the structure of the first push rod in an embodiment of the present invention.

[0039] Reference numerals:

[0040] 100. mounting frame; 101. conveyor belt;

[0041] 200, placement box; 201, electric push rod; 202, limit plate; 203, mounting plate; 204, first servo motor; 205, pneumatic suction cup; 206, connecting plate; 207, first nut seat; 208, first lead screw; 209, bearing; 210, limit groove; 211, support plate;

[0042] 300, second servo motor; 301, mounting seat; 302, fixing plate; 303, sliding groove; 304, second lead screw; 305, second nut seat; 306, fixing ring; 307, camera;

[0043] 400, connecting ring; 401, limiting baffle; 402, first push rod; 403, hand-tightening bolt; 404, limiting ring; 405, notch; 406, connecting rod; 407, limiting hole; 408, handle; 409, groove; 410, scale line; 411, U-shaped frame; 412, limiting rod;

[0044] 500, mounting plate; 501, controller; 502, workstation; 503, carrier board; 504, laser sensor;

[0045] 600, first bolt; 601, lighting lamp; 602, fixing rod; 603, ring;

[0046] 700, mounting ring; 701, round rod; 702, limiting strip; 703, snap-in piece; 704, snap-in groove. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0048] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0049] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0050] See attached Figure 1-7As shown, an automatic optical inspection system for ACF interconnection of a liquid crystal module based on high-precision image recognition according to an embodiment of the present invention comprises a mounting frame 100, a conveyor belt 101 is fixedly mounted on the top of the mounting frame 100, a guide component for guiding the liquid crystal module is arranged at the feeding end of the conveyor belt 101, a visual inspection component for inspecting the ACF interconnection of the liquid crystal module is arranged in the middle of the conveyor belt 101, a removal component for removing a defective liquid crystal module is arranged at the top of the discharging end of the conveyor belt 101, and a control component for controlling the conveyor belt 101 and the removal component is arranged on the front side of the conveyor belt 101. A complete liquid crystal module inspection and processing system is formed through the conveyor belt 101 and equipped with the setting of the guide component, the visual inspection component, the removal component and the control component. From feeding to discharging, each link cooperates closely, which can effectively improve the automation degree and efficiency of liquid crystal module inspection, ensure product quality, and reduce manual intervention and errors.

[0051] See also Figure 1-2 As shown, the guide assembly includes limit baffles 401 respectively arranged on the inner walls of the side ribs on both sides of the feed end of the conveyor belt 101, and the right ends of the two groups of limit baffles 401 are each provided with a notch 405, and the insides of the two groups of notches 405 are respectively fixedly connected with connecting rods 406, and the surfaces of the two groups of connecting rods 406 are both rotatably sleeved with connecting rings 400, and one side of the two groups of connecting rings 400 is respectively fixedly connected to the inner walls of the corresponding side ribs of the conveyor belt 101, and the other ends of the two groups of limit baffles 401 are respectively connected to the first push rods 402 through the rotating connecting pieces, and one end of the two groups of first push rods 402 respectively penetrates the conveyor belt 101. Corresponding to the side guards, the ends of the two groups of first push rods 402 facing each other are fixedly connected with handles 408, and both sides of the conveyor belt 101 are provided with fixing parts for fixing the first push rods 402. Through the setting of the guide component, limit baffles 401 are set on the inner walls of the guards on both sides of the feeding end of the conveyor belt 101, which can perform preliminary and accurate positioning of the liquid crystal module to ensure that it moves along the correct path on the conveyor belt 101. The limit baffle 401 is connected to the guard of the conveyor belt 101 through the notch 405, the limit rod 412 and the connecting ring 400, which not only ensures the stability of the structure but also allows a certain degree of flexibility.

[0052] See also Figure 3As shown, the visual inspection component includes a fixed plate 302 fixedly installed on the top of the conveyor belt 101, a mounting seat 301 is fixedly inserted on the top of the right side of the fixed plate 302, a fixing ring 306 is connected to the right side of the mounting seat 301 through a displacement member, a camera 307 is arranged in the inner cavity of the fixing ring 306, a limiting member is arranged on the top of the fixing ring 306 to prevent the camera 307 from falling out, and a lighting component is arranged on the right side of the fixed plate 302. Through the setting of the visual inspection component, the camera 307 and other equipment can collect images of the ACF interconnection of the liquid crystal module, and can clearly capture the detailed features of the part, so as to accurately detect various defects such as cracks, bubbles, short circuits, open circuits, etc., and at the same time, there is no need for direct human intervention in the inspection process, which greatly improves the inspection efficiency and reduces the labor cost. Moreover, the inspection work can be carried out stably for a long time, avoiding the problems of visual fatigue and misjudgment that may occur in manual inspection.

[0053] The lighting assembly includes lighting lamps 601 arranged at both ends of the right side of the fixed plate 302. The two sets of lighting lamps 601 are connected to the corresponding side surfaces of the fixed plate 302 through mounting parts. Through the setting of the lighting assembly, good lighting conditions are provided for the camera 307, shadows and reflections are reduced, image quality is improved, and it is helpful to more accurately detect defects at the ACF interconnection of the liquid crystal module.

[0054] See also Figure 5 As shown, the removal component includes a support plate 211 fixedly installed on the top of the retaining edge on one side of the feeding end of the conveyor belt 101, one side of the support plate 211 is fixedly connected to a limiting plate 202, the other end of the limiting plate 202 extends upward to the other side of the conveyor belt 101, one side of the limiting plate 202 is provided with a mounting plate 203, the top of the mounting plate 203 is fixedly connected with an electric push rod 201, the telescopic end of the electric push rod 201 downwardly penetrates the mounting plate 203 and is fixedly connected with a pneumatic suction cup 205 for adsorbing the liquid crystal module, the other side surface of the conveyor belt 101 is fixedly connected with a placement box 200, a limiting groove 210 is provided inside the limiting plate 202, and a mechanism is provided inside the limiting groove 210 to push the mounting plate 203 toward the other side so as to adsorb the liquid crystal module The pneumatic suction cup 205 of the group is moved to the pushing component above the placement box 200. By setting the removal component, the support plate 211, the limit plate 202, the mounting plate 203, the electric push rod 201 and the pneumatic suction cup 205 and other structures, together with the pushing component in the limit groove 210, can accurately and efficiently remove the defective LCD module from the conveyor belt 101 and place it in the placement box 200 after the defective LCD module is detected, so as to realize the automatic separation of defective products, avoid the mixing of defective products into qualified products, improve the product qualification rate, and greatly reduce the cost compared with the use of a robotic arm. At the same time, the technology of the electric push rod 201 and the pneumatic suction cup 205 is relatively mature, so it has a lower failure rate, and the structure is simple, which is convenient for operators to repair and maintain.

[0055] See also Figure 1 As shown, the control component includes a mounting plate 500 and a carrier plate 503 fixedly mounted on the surface of one side of the mounting frame 100, a controller 501 is fixedly connected to the surface of the mounting plate 500, a workstation 502 is placed on the top of the carrier plate 503, a laser sensor 504 is embedded in the inner wall of the side rib of the conveyor belt 101 and at a position corresponding to the pneumatic suction cup 205, the signal output end of the laser sensor 504 is electrically connected to the signal input end of the controller 501 through a wire, the signal output end of the controller 501 is electrically connected to the signal input end of the workstation 502 through a wire, and the signal output end of the camera 307 is electrically connected to the signal input end of the workstation 502 through a wire. Through the setting of the control component, the controller 501, the workstation 502 and the laser sensor 504 in the control component cooperate with each other. The controller 501 receives the signal of the laser sensor 504, and exchanges information with the workstation 502, and accurately controls the conveyor belt 101 and the removal component according to the result of the image recognition module, so as to realize the automation and intelligent coordination of the entire detection process and ensure the stable operation of the system.

[0056] Among them, the workstation 502 is integrated with an image recognition module for identifying the pictures input into the workstation 502 by the camera 307. Through the setting of the recognition module, the image recognition module can conduct in-depth analysis of the images of the ACF interconnection of the liquid crystal module collected by the visual inspection component, accurately identify various defects, such as cracks, bubbles, short circuits, open circuits, etc., and classify and mark information such as the type, size, and location of the defects, so as to help staff quickly locate and evaluate product quality and decide whether the liquid crystal module needs further processing or repair.

[0057] The camera 307 is one of a line array camera, an area array camera, a telecentric lens camera, and a macro lens camera.

[0058] The image recognition module pre-processes the original image captured by the camera 307 to improve the image quality and enhance the recognizability of features so as to better extract features.

[0059] Extract information that can represent the essential characteristics of the image from the preprocessed image, such as edge detection, which determines the edge of the object by detecting the place where the pixel value changes dramatically in the image, so as to obtain the contour information of the ACF interconnection of the LCD module; texture feature extraction, analyze the grayscale distribution and periodic changes of the pixels in the image to identify whether the texture characteristics of the interconnection are normal; shape feature extraction, calculate the geometric shape characteristics of the object, such as area, perimeter, circularity, etc., to determine whether the shape of the LCD module meets the standards.

[0060] The features of the extracted image to be detected are matched and compared with the feature patterns stored in the model, and indicators such as similarity or distance are calculated to determine the category to which the image most likely belongs, that is, to determine whether the LCD module has defects and the type of defects. Based on the results of model matching, the image recognition module classifies the image and determines it as normal or belonging to a certain defect type.

[0061] See also Figure 3 As shown, the displacement member includes a sliding groove 303 opened on the right side surface of the mounting seat 301, and the middle part of the sliding groove 303 is rotatably connected to a second lead screw 304 arranged vertically. A second servo motor 300 is fixedly installed on the top of the mounting seat 301, and the output shaft of the second servo motor 300 extends downward and is connected to one end of the second lead screw 304 through a coupling. The surface of the second lead screw 304 is threadedly connected to a second nut seat 305, and one side of the fixing ring 306 is fixedly connected to the surface of the second nut seat 305. The signal input end of the second servo motor 300 is electrically connected to the signal output end of the controller 501 through a wire. Through the setting of the displacement member, the vertical position adjustment of the camera 307 is more precise. The control of the second servo motor 300 by the controller 501 can realize fine adjustment of the position of the camera 307, so as to better adapt to liquid crystal modules of different sizes and shapes, obtain clearer and more accurate images of the ACF interconnection of the liquid crystal module, and improve the detection accuracy.

[0062] See also Figure 6 As shown, the pushing assembly includes a first servo motor 204 fixedly connected to the outer side of the support plate 211, the output shaft of the first servo motor 204 extends to the inner cavity of the limit groove 210, the output shaft of the first servo motor 204 is connected to the first lead screw 208 through a coupling, the other end of the first lead screw 208 is sleeved with a bearing 209, the bearing 209 is embedded in the corresponding side surface of the limit plate 202, the surface of the first lead screw 208 is threadedly connected to the first nut seat 207, one side of the first nut seat 207 is fixedly connected to the connecting plate 206, and the connecting plate 206 is slidably connected At the mouth of the limiting groove 210, the other end of the connecting plate 206 is fixedly connected to the surface of the mounting plate 203 on the outside, and the signal input end of the first servo motor 204 is electrically connected to the signal output end of the controller 501 through a wire. By pushing the setting of the component, the stable movement of the mounting plate 203 in the limiting groove 210 is achieved, ensuring that the electric push rod 201 and the pneumatic suction cup 205 accurately reach the target position, stably adsorbing and moving the defective liquid crystal module, reducing errors caused by shaking or deviation during movement, and improving the work efficiency and reliability of removing components.

[0063] The mounting parts include circular rings 603 respectively fixing the two ends of the right side of the plate 302, the inner cavities of the two groups of circular rings 603 are rotatably plugged with fixing rods 602, one ends of the two groups of fixing rods 602 are respectively fixedly connected to the surface of the corresponding side lighting lamps 601, the tops of the two groups of circular rings 603 are respectively threadedly connected with first bolts 600, the two groups of first bolts 600 respectively thread downwardly penetrate the circular rings 603 and abut against the surface of the corresponding side fixing rods 602, through the setting of the mounting parts, the angle of the lighting lamp 601 is adjustable, the operator can flexibly adjust the angle of the lighting lamp 601 according to the actual lighting requirements and the position of the liquid crystal module, so that the light is evenly irradiated on the ACF interconnection of the liquid crystal module, further improving the quality of image acquisition and enhancing the detection effect.

[0064] See also Figure 7 As shown, the rotating connecting member includes a U-shaped frame 411 fixedly installed on the opposite ends of the two groups of first push rods 402, and the top of the left end of the two groups of limiting baffles 401 are provided with limiting holes 407 set along the length, and the inner cavities of the two groups of limiting holes 407 are respectively provided with limiting rods 412, and the upper and lower ends of the two groups of limiting rods 412 are respectively fixedly connected to the upper and lower inner walls of the corresponding side U-shaped frames 411. Through the setting of the rotating connecting member, a stable and reliable rotating connection is formed between the first push rod 402 and the limiting baffle 401, which can ensure that the limiting baffle 401 can flexibly adjust the angle according to the movement of the first push rod 402 while bearing the collision and friction of the liquid crystal module during the transportation process, thereby ensuring the stability of the guiding structure and improving the accuracy of the guiding.

[0065] See also Figure 1 As shown, the fixing parts include limit rings 404 fixedly installed on both sides of the conveyor belt 101 and at positions corresponding to the outer cylindrical surface of the first push rod 402. The tops of the two sets of limit rings 404 are respectively threadedly connected with hand bolts 403. The two sets of hand bolts 403 are respectively threaded downward and abut against the surfaces of the first push rods 402 on the corresponding sides. Through the setting of the fixing parts, the position of the first push rod 402 can be fixed conveniently and quickly. The operator only needs to tighten the hand bolts 403 to easily adjust and fix the first push rod 402, which improves the convenience of operation. At the same time, this fixing method can ensure the stability of the first push rod 402 during operation and ensure that the limit baffle 401 is always in the correct guide position.

[0066] It is worth mentioning that a groove 409 is provided on one side surface of the first push rod 402, and a scale line 410 is provided in the inner cavity of the groove 409. Through the setting of the scale line 410, the operator can have a clear reference when adjusting the position of the push rod. By reading the scale value, the first push rod 402 can be accurately adjusted to a suitable position, thereby realizing precise control of the position of the limit baffle 401 and further improving the guiding accuracy of liquid crystal modules of different sizes.

[0067] See also Figure 4 As shown, the limiting member includes two sets of mounting rings 700 at the top of the left side of the fixing ring 306, the inner rings of the two sets of mounting rings 700 are rotatably plugged with round rods 701, the middle parts of the two sets of mounting rings 700 are provided with limiting strips 702, the two sets of round rods 701 are respectively fixedly installed on the surface of the limiting strips 702, the right end of the limiting strips 702 extends to the right top of the fixing ring 306, the right end of the limiting strips 702 is fixedly connected with a clamping piece 703, the right top of the fixing ring 306 and the clamping piece 703 A snap-in slot 704 is provided at the corresponding position, and the snap-in sheet 703 is snapped into the inner cavity of the snap-in slot 704. Through the setting of the limiter, the camera 307 is provided with reliable anti-escape protection. During the operation of the equipment, even if it is subjected to external forces such as vibration and collision, the camera 307 can be firmly maintained in the fixing ring 306, ensuring that the camera 307 works stably during the detection process and continuously collects high-quality images. At the same time, it is easy to disassemble the camera 307, which is beneficial for the staff to perform regular maintenance.

[0068] The present invention also provides a detection method of a liquid crystal module ACF interconnection automatic optical detection system based on high-precision image recognition, comprising the following steps:

[0069] One end of the limit baffle 401 is connected to the inner wall of the conveyor belt 101 through the limit rod 412 and the connecting ring 400, and the other end is connected to the first push rod 402 by means of a rotating connecting piece. The first push rod 402 passes through the conveyor belt 101. The position of the first push rod 402 is fixed by tightening the hand bolt 403 that threads through the limit ring 404 and abuts against the surface of the first push rod 402. At the same time, the scale line 410 in the groove 409 on the surface of one side of the first push rod 402 is checked. The operator can accurately adjust the position of the first push rod 402, and then determine the position of the limit baffle 401, so that it adapts to the LCD module to be detected, and guides the LCD module to accurately enter the middle area of ​​the conveyor belt 101.

[0070] As the conveyor belt 101 operates, the liquid crystal module is conveyed to the middle position of the visual inspection component. At this time, the controller 501 controls the second servo motor 300 to start according to the preset instructions. The second servo motor 300 drives the second screw 304 connected thereto to rotate in the sliding groove 303, and then drives the second nut seat 305 to make vertical linear motion along the sliding groove 303. The fixed ring 306 fixedly connected thereto and the camera 307 in the inner cavity of the fixed ring 306 also move up and down accordingly. The height of the camera 307 is adjusted to a suitable height, and the image of the ACF interconnection of the liquid crystal module is collected. The lighting lamp 601 is turned on to provide good lighting conditions for the camera 307 to ensure that the camera 307 can clearly capture the appearance of the ACF interconnection of the liquid crystal module and other image information.

[0071] The image data collected by the camera 307 will be transmitted in real time via wires to the image recognition module integrated in the workstation 502. The module uses its built-in multiple visual algorithms to pre-process the image, such as removing noise, enhancing contrast, etc., and then extract image features. It then analyzes whether there are defects in the ACF interconnection of the liquid crystal module based on preset judgment criteria, and feeds back the recognition results to the controller 501.

[0072] If the image recognition module determines that a certain LCD module has a defect, when the LCD module continues to be conveyed forward along the conveyor belt 101 to near the top of the discharge end, the removal component on the support plate 211 located at the top of the sidewall on the feed end side of the conveyor belt 101 starts to operate, and the laser sensor 504 embedded in the inner wall of the sidewall on one side of the conveyor belt 101 detects that the defective LCD module has arrived at the corresponding position, and transmits the detection signal to the controller 501, thereby triggering the subsequent removal action.

[0073] The controller 501 controls the telescopic end of the electric push rod 201 to extend downward, so that the pneumatic suction cup 205 contacts and absorbs the defective LCD module, and then the electric push rod 201 moves upward with the absorbed LCD module. Then, the controller 501 controls the first servo motor 204 to start, and the output shaft of the first servo motor 204 drives the first lead screw 208 to rotate. The first nut seat 207 threadedly connected to the surface of the first lead screw 208 moves along the limiting groove 210 to the other side. The connecting plate 206 is fixedly connected to the mounting plate 203, thereby driving the pneumatic suction cup 205 that adsorbs the LCD module to move to the other side, and the pneumatic suction cup 205 that adsorbs the defective LCD module is moved above the placement box 200. Then the electric push rod 201 is extended again to place the LCD module into the placement box 200, completing the removal operation of the defective LCD module, so that the qualified LCD module can continue to be conveyed forward along the conveyor belt 101, thereby realizing effective detection of the LCD module and separation of defective products.

[0074] In summary, the embodiment of the present invention is an automatic optical inspection system for ACF interconnection of liquid crystal modules based on high-precision image recognition, which forms a complete liquid crystal module inspection and processing system. From feeding to discharging, each link cooperates closely, which can effectively improve the automation and efficiency of liquid crystal module inspection, ensure product quality, and reduce manual intervention and errors.

[0075] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic optical inspection system for ACF interconnection of a liquid crystal module based on high-precision image recognition, comprising a mounting frame (100), characterized in that: A conveyor belt (101) is fixedly mounted on the top of the mounting frame (100); a guide component for guiding the liquid crystal module is arranged at the feed end of the conveyor belt (101); a visual inspection component for inspecting the ACF interconnection of the liquid crystal module is arranged at the middle of the conveyor belt (101); a removal component for removing a defective liquid crystal module is arranged at the top of the discharge end of the conveyor belt (101); and a control component for controlling the conveyor belt (101) and the removal component is arranged on the front side of the conveyor belt (101).

2. The liquid crystal module ACF interconnection automatic optical inspection system based on high-precision image recognition according to claim 1, characterized in that: The guide assembly comprises limit baffles (401) respectively arranged on the inner walls of the side ribs on both sides of the feed end of the conveyor belt (101); a notch (405) is opened at one end of the right side of the two groups of limit baffles (401); the inside of the two groups of notches (405) is respectively fixedly connected with a connecting rod (406); the surfaces of the two groups of connecting rods (406) are rotatably sleeved with a connecting ring (400); one side of the two groups of connecting rings (400) is respectively fixedly connected to the inner wall of the corresponding side rib of the conveyor belt (101); the other ends of the two groups of limit baffles (401) are respectively connected to the first push rods (402) via a rotating connecting piece; one end of the two groups of the first push rods (402) respectively penetrates the corresponding side rib of the conveyor belt (101); and fixing pieces for fixing the first push rods (402) are respectively provided on both sides of the conveyor belt (101); The visual detection component comprises a fixing plate (302) fixedly mounted on the top of the sidewall of the conveyor belt (101); a mounting seat (301) is fixedly plugged into the top of the right side of the fixing plate (302); a fixing ring (306) is connected to the right side of the mounting seat (301) via a displacement member; a camera (307) is arranged in the inner cavity of the fixing ring (306); a limiting member for preventing the camera (307) from falling out is arranged on the top of the fixing ring (306); and a lighting component is arranged on the right side of the fixing plate (302); The lighting assembly comprises lighting lamps (601) arranged at two ends of the right side of the fixing plate (302), and two groups of the lighting lamps (601) are connected to corresponding side surfaces of the fixing plate (302) via mounting parts; The removal component comprises a support plate (211) fixedly mounted on the top of the retaining edge on one side of the feed end of the conveyor belt (101); one side of the support plate (211) is fixedly connected to a limit plate (202); the other end of the limit plate (202) extends upward to the other side of the conveyor belt (101); a mounting plate (203) is arranged on one side of the limit plate (202); the top of the mounting plate (203) is fixedly connected to an electric push rod (201); the telescopic end of the electric push rod (201) passes through the mounting plate (203) downward and is fixedly connected to a pneumatic suction cup (205) for adsorbing a liquid crystal module; the other side surface of the conveyor belt (101) is fixedly connected to a placement box (200); a limit groove (210) is provided inside the limit plate (202); a pushing component is arranged inside the limit groove (210) for pushing the mounting plate (203) toward the other side, thereby moving the pneumatic suction cup (205) for adsorbing the liquid crystal module to the top of the placement box (200); The control component comprises a mounting plate (500) and a carrier plate (503) fixedly mounted on a surface of one side of the mounting frame (100); a controller (501) is fixedly connected to the surface of the mounting plate (500); a workstation (502) is placed on the top of the carrier plate (503); a laser sensor (504) is embedded in an inner wall of a side rib of the conveyor belt (101) and at a position corresponding to the pneumatic suction cup (205); a signal output end of the laser sensor (504) is electrically connected to a signal input end of the controller (501) via a wire; the signal output end of the controller (501) is electrically connected to a signal input end of the workstation (502) via a wire; and the signal output end of the camera is electrically connected to a signal input end of the workstation (502) via a wire; The workstation (502) is integrated with an image recognition module for recognizing pictures input into the workstation (502) by the camera (307).

3. The liquid crystal module ACF interconnection automatic optical inspection system based on high-precision image recognition according to claim 2, characterized in that: The displacement member comprises a sliding groove (303) opened on the right side surface of the mounting seat (301); a second lead screw (304) arranged vertically is rotatably connected to the middle part of the sliding groove (303); a second servo motor (300) is fixedly mounted on the top of the mounting seat (301); an output shaft of the second servo motor (300) extends downward and is connected to one end of the second lead screw (304) through a coupling; a second nut seat (305) is threadedly connected to the surface of the second lead screw (304); one side of the fixing ring (306) is fixedly connected to the surface of the second nut seat (305); and a signal input end of the second servo motor (300) is electrically connected to a signal output end of the controller (501) through a wire.

4. The liquid crystal module ACF interconnection automatic optical inspection system based on high-precision image recognition according to claim 3 is characterized in that: The pushing assembly comprises a first servo motor (204) fixedly connected to the outside of the support plate (211), the output shaft of the first servo motor (204) extending toward the inner cavity of the limiting groove (210), the output shaft of the first servo motor (204) being connected to a first lead screw (208) via a coupling, the other end of the first lead screw (208) being sleeved with a bearing (209), the bearing (209) being embedded in the corresponding side surface of the limiting plate (202), the surface of the first lead screw (208) being threadedly connected to a first nut seat (207), one side of the first nut seat (207) being fixedly connected to a connecting plate (206), the connecting plate (206) being slidably connected to the mouth of the limiting groove (210), the other end of the connecting plate (206) being fixedly connected to the surface of the mounting plate (203), and the signal input end of the first servo motor (204) being electrically connected to the signal output end of the controller (501) via a wire.

5. The liquid crystal module ACF interconnection automatic optical inspection system based on high-precision image recognition according to claim 4, characterized in that: The mounting member comprises circular rings (603) respectively fixed at two ends of the right side of the plate (302); the inner cavities of the two groups of circular rings (603) are both rotatably plugged with fixing rods (602); one end of the two groups of fixing rods (602) are respectively fixedly connected to the surface of the corresponding side lighting lamps (601); the tops of the two groups of circular rings (603) are respectively threadedly connected with first bolts (600); the two groups of first bolts (600) are respectively threaded downwardly through the circular rings (603) and abut against the surface of the corresponding side fixing rods (602).

6. The liquid crystal module ACF interconnection automatic optical inspection system based on high-precision image recognition according to claim 5, characterized in that: The rotating connecting member comprises a C-shaped frame (411) fixedly mounted on opposite ends of the two groups of the first push rods (402), and the top of the left end of the two groups of the limiting baffles (401) are provided with a limiting hole (407) arranged along the length, and the inner cavities of the two groups of the limiting holes (407) are respectively provided with limiting rods (412), and the upper and lower ends of the two groups of the limiting rods (412) are respectively fixedly connected to the upper and lower inner walls of the corresponding side C-shaped frames (411).

7. The liquid crystal module ACF interconnection automatic optical inspection system based on high-precision image recognition according to claim 6, characterized in that: The fixing member comprises a limiting ring (404) fixedly mounted on both sides of the conveyor belt (101) and at a position corresponding to the outer circumferential surface of the first push rod (402), the tops of the two groups of limiting rings (404) are respectively threadedly connected with hand bolts (403), and the two groups of hand bolts (403) are respectively threadedly penetrated downward and abut against the surface of the first push rod (402) on the corresponding side.

8. The automatic optical inspection system for ACF interconnection of liquid crystal modules based on high-precision image recognition according to claim 7, characterized in that: A groove (409) is provided on one side surface of the first push rod (402), and a scale line (410) is provided in the inner cavity of the groove (409).

9. The automatic optical inspection system for ACF interconnection of liquid crystal modules based on high-precision image recognition according to claim 8, characterized in that: The limiting member comprises two groups of mounting rings (700) at the top left side of the fixing ring (306); the inner rings of the two groups of mounting rings (700) are rotatably plugged with round rods (701); a limiting strip (702) is arranged in the middle of the two groups of mounting rings (700); the two groups of round rods (701) are respectively fixedly mounted on the surface of the limiting strip (702); the right end of the limiting strip (702) extends to the top right side of the fixing ring (306); the right end of the limiting strip (702) is fixedly connected with a snap-in plate (703); a snap-in groove (704) is provided at the top right side of the fixing ring (306) and at a position corresponding to the snap-in plate (703); the snap-in plate (703) is snap-into the inner cavity of the snap-in groove (704).

10. A detection method of a liquid crystal module ACF interconnection automatic optical detection system based on high-precision image recognition according to any one of claims 1 to 9, characterized in that: The steps include: S1: One end of the limit baffle (401) is connected to the inner wall of the rib of the conveyor belt (101) through a limit rod (412) and a connecting ring (400), and the other end is connected to the first push rod (402) by means of a rotating connecting piece, and the first push rod (402) passes through the rib of the conveyor belt (101). The position of the first push rod (402) is fixed by tightening the hand-tightening bolt (403) which is threadedly passed through the limit ring (404) and abuts against the surface of the first push rod (402). At the same time, the scale line (410) in the groove (409) on one side of the surface of the first push rod (402) is checked. The operator can accurately adjust the position of the first push rod (402) and then determine the position of the limit baffle (401) so that it is suitable for the liquid crystal module to be detected and guides the liquid crystal module to accurately enter the middle area of ​​the conveyor belt (101); S2: As the conveyor belt (101) operates, the liquid crystal module is conveyed to the position of the visual inspection component in the middle. At this time, the controller (501) controls the second servo motor (300) to start according to the preset instruction. The second servo motor (300) drives the second lead screw (304) connected thereto to rotate in the sliding groove (303), thereby driving the second nut seat (305) to make vertical linear motion along the sliding groove (303). The fixed ring (306) fixedly connected thereto and the camera in the inner cavity of the fixed ring (306) also move up and down accordingly. The height of the camera (307) is adjusted to a suitable height, and the image of the ACF interconnection of the liquid crystal module is collected. The lighting lamp (601) is turned on to provide good lighting conditions for the camera, so as to ensure that the camera (307) can clearly capture the appearance and other image information of the ACF interconnection of the liquid crystal module; S3: The image data collected by the camera (307) is transmitted in real time via a wire to an image recognition module integrated in the workstation (502). The module uses its built-in multiple visual algorithms to pre-process the image, such as removing noise, enhancing contrast, etc., and then extract image features. It then analyzes whether there are defects at the ACF interconnection of the liquid crystal module according to a preset judgment standard, and feeds back the recognition result to the controller (501); S4: If the image recognition module determines that a certain liquid crystal module has a defect, when the liquid crystal module continues to be conveyed forward along the conveyor belt (101) to the vicinity of the top of the discharge end, the removal component on the support plate (211) located at the top of the sidewall on the feeding end side of the conveyor belt (101) starts to operate, and after the laser sensor embedded in the inner wall of the sidewall on the side of the conveyor belt (101) detects that the defective liquid crystal module has arrived at the corresponding position, it transmits a detection signal to the controller (501), thereby triggering a subsequent removal action; S5: The controller (501) controls the telescopic end of the electric push rod (201) to extend downward, so that the pneumatic suction cup (205) contacts and absorbs the defective liquid crystal module, and then the electric push rod (201) moves upward with the absorbed liquid crystal module. Then, the controller (501) controls the first servo motor (204) to start, and the output shaft of the first servo motor (204) drives the first lead screw (208) to rotate. The first nut seat (207) threadedly connected to the surface of the first lead screw (208) moves along the limiting groove (210) to the other side. Since the first nut seat ( 207) is fixedly connected to the mounting plate (203) through the connecting plate (206), thereby driving the pneumatic suction cup (205) for adsorbing the liquid crystal module to move to the other side, and the pneumatic suction cup (205) adsorbing the defective liquid crystal module is moved to the top of the placement box (200), and then the electric push rod (201) is extended again to place the liquid crystal module into the placement box (200), completing the removal operation of the defective liquid crystal module, so that the qualified liquid crystal module can continue to be conveyed forward along the conveyor belt (101), thereby achieving effective detection of the liquid crystal module and separation of defective products.

Images