OLED display screen defect detection production line and detection method

Abstract

The invention relates to the technical field of visual inspection, in particular to an OLED display screen defect detection production line and a detection method.The OLED display screen defect detection production line comprises a first elevator, a rack is arranged on the left side of the first elevator, a conveying belt used for conveying OLED display screens is arranged on the rack, and a second elevator is arranged on the left side of the rack; the first detection box and the second detection box which are identical in structure are arranged in the middle of the rack in a bilateral symmetry mode, the CCD image detection module is driven by the reciprocating swing mechanism to swing along the curved surface radian of the curved surface display screen, thorough shooting of the curved surface display screen is facilitated, shooting dead angles are avoided, the accuracy of follow-up detection is improved, and the detection efficiency is improved. After the reciprocating swing mechanism swings and shoots once, the reciprocating swing mechanism and the pressing mechanism are matched for use to drive the pressing mechanism to swing synchronously, and meanwhile, the pressing mechanism carries out pressing shooting on the curved-surface display screen, so that the curved-surface display screen is shot under the pressing working condition, and the accuracy of subsequent detection is improved.

Description

Technical Field

[0001] This invention belongs to the field of visual inspection technology, specifically relating to an OLED display defect detection production line and detection method. Background Technology

[0002] OLED is an advanced self-emissive display technology. With its superior image quality and unique physical properties, it has become the mainstream choice for high-end display products such as smartphones, televisions, and wearable devices. OLED displays include various types such as curved displays, flat displays, and flexible displays. Curved OLED displays, in particular, are already the main displays for high-end electronics. Curved OLED displays require testing before leaving the factory, and the following issues arise during the testing process:

[0003] 1. When performing defect detection on curved OLED displays, CCD image acquisition cameras are typically used to acquire images. The acquired images are then compared and analyzed with images of qualified products in a database to identify defects in the display. However, because the display is curved, the CCD image acquisition camera is usually positioned perpendicular to the display when acquiring images, resulting in an angle between the camera and the edge of the curved surface. This makes it difficult to guarantee the accuracy of the captured images and reduces the accuracy of subsequent inspections.

[0004] 2. When testing curved OLED displays, compared to traditional flat screens, curved screens need to undergo pressure testing to check for water ripple defects and pressure marks under pressure. However, since curved OLED displays are curved, the traditional top-down pressing method can easily damage the display. Furthermore, the pressing angle is not perpendicular to the curved OLED display, meaning the side of the pressing head contacts the display, making it difficult to completely simulate the usage situation of the display under pressure. Summary of the Invention

[0005] The purpose of this invention is to provide a simple and reasonably designed OLED display defect detection production line and detection method to solve the above problems.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] An OLED display defect detection production line includes a No. 1 elevator, a frame is set on the left side of the No. 1 elevator, a conveyor belt for transporting OLED displays is set on the frame, a No. 2 elevator is set on the left side of the frame, and a No. 1 inspection box and a No. 2 inspection box with identical structures are symmetrically arranged in the middle of the frame.

[0008] Also includes:

[0009] A lifting and clamping mechanism symmetrically arranged on the left and right sides in the middle of the frame for clamping and fixing OLED displays;

[0010] A pressing mechanism is installed inside the No. 1 testing box;

[0011] Two top plates are symmetrically fixedly connected to the top surface inside the No. 1 detection box. The bottom of the two top plates is fixedly connected to an electric slide rail. An electric slider is slidably connected to the bottom of the electric slide rail. A side plate is fixedly connected to the bottom of the electric slider. A reciprocating swing mechanism is set on the side plate. A CCD image detection module is set on the reciprocating swing mechanism.

[0012] Preferably, the lifting and clamping mechanism includes a hydraulic cylinder fixedly installed on the frame, a lifting plate fixedly connected to the output end of the hydraulic cylinder, a No. 1 connecting rod fixedly connected to the four corners of the top of the lifting plate, a support plate for supporting the OLED display fixedly connected to the top of the No. 1 connecting rod, a No. 1 fixing plate fixedly installed on the edge of the lifting plate, an active extrusion wedge fixedly connected to the top of the No. 1 fixing plate, and a clamping assembly is provided between the active extrusion wedge and the frame.

[0013] Preferably, the clamping assembly includes a limiting slide rail fixedly connected to the frame, a limiting slider slidably connected on the limiting slide rail, a mounting plate fixedly connected to the top of the limiting slider, two clamping rods for centering and clamping the OLED display screen symmetrically fixedly connected to the top of the mounting plate, two driven pressure wedges cooperating with the active compression wedges symmetrically installed on the side of the mounting plate away from the OLED display screen, and a No. 1 spring fixedly connected between the side of the limiting slide rail near the OLED display screen and the mounting plate.

[0014] Preferably, the reciprocating swing mechanism includes a power component and a lifting adjustment component. The power component is mounted on the side plate, and the lifting adjustment component is mounted on the power component. The power component includes a support fixedly connected to the bottom front side of the side plate. A servo motor is fixedly connected to the top of the support. A rotating disk is fixedly connected to the output end of the servo motor. A rotating rod is rotatably mounted on the top front side of the side plate. A swing arm is fixedly sleeved at the front end of the rotating rod. A triangular tooth block is fixedly mounted at the front end of the swing arm. A limit groove is formed inside the swing arm. A limit pin is fixedly connected to the edge of the rotating disk and slidably connected inside the limit groove. A fixing frame is fixedly mounted on the front side of the support. A connecting shaft rotatably passes through the top of the fixing frame. A gear that meshes with the triangular tooth block is fixedly sleeved at one end of the connecting shaft.

[0015] Preferably, the lifting adjustment assembly includes a swing plate fixedly installed at the other end of the connecting shaft, a sliding sleeve slidably installed on the swing plate, a spring rod provided on the sliding sleeve, an installation arm fixedly installed at the bottom front side of the sliding sleeve, a connecting block fixedly installed at the bottom of the installation arm, a fixing ring fixedly installed at the front side of the connecting block, the inner wall of the fixing ring being fixedly connected to the outer wall of the CCD image detection module, and an arc-shaped hemispherical head fixedly installed on the outside of the fixing ring.

[0016] Preferably, the pressing mechanism includes an unlocking component located on the right side inside the first detection box, a fixing rod located on the left side inside the first detection box, a limiting sleeve fixedly installed at one end of the fixing rod, an arc-shaped movable rod slidingly passing through the limiting sleeve, an automatic locking component located at the bottom end of the arc-shaped movable rod, and a squeezing component located between the automatic locking component and the fixing rod.

[0017] Preferably, the unlocking component includes a connecting plate fixedly connected to the right side inside the No. 1 detection box, a U-shaped frame fixedly installed at the end of the connecting plate away from the No. 1 detection box, and arc-shaped extrusion heads fixedly connected to both ends of the U-shaped frame.

[0018] Preferably, the automatic locking assembly includes a snap-fit ​​cylinder fixedly installed at the bottom of the arc-shaped movable rod. Two mounting sleeves are fixedly installed on the front and rear sides of the snap-fit ​​cylinder. A pull rod is movably passed through the interior of the mounting sleeves and the snap-fit ​​cylinder. An arc-shaped pressure head is fixedly installed at one end of the pull rod inside the snap-fit ​​cylinder. A baffle is fixedly sleeved in the middle of the pull rod. A No. 4 spring is sleeved in the middle of the pull rod. The No. 4 spring is located between the baffle and the inner wall of the mounting sleeve. A No. 2 connecting rod is fixedly installed at the end of the pull rod away from the arc-shaped pressure head. A compression plate is fixedly installed at one end of the No. 2 connecting rod.

[0019] Preferably, the extrusion assembly includes a second fixing plate fixedly installed on the outer wall of the snap-fit ​​cylinder. Several telescopic rods are movably passed through the second fixing plate. A fixing seat is fixedly installed at the end of the telescopic rod away from the second fixing plate. An extrusion wheel is rotatably installed on the fixing seat. A second spring is sleeved on the outside of the telescopic rod. The second spring is located between the fixing seat and the second fixing plate. A second hinge seat is hinged to the top left side of the snap-fit ​​cylinder. A first hinge seat is hinged to the bottom of the fixing rod. A third spring is fixedly installed between the first hinge seat and the second hinge seat.

[0020] The OLED display defect detection method includes the following steps:

[0021] S1. Curved display screen loading: The curved display screen is loaded by conveying it through the frame and the conveyor belt on it;

[0022] S2. Lifting and clamping: After the material is loaded into the No. 1 inspection box, the curved display screen is lifted by the lifting and clamping mechanism. During the lifting process, the curved display screen is simultaneously centered and clamped.

[0023] S3, One swing shot: After centering and clamping, the CCD image detection module is driven by the reciprocating swing mechanism to swing and shoot along the curve of the curved display screen.

[0024] S4. Secondary Press and Swing Shooting: After the first swing shooting, the curved display screen is simultaneously shot while being pressed by the reciprocating swing mechanism and the pressing mechanism. This allows for a second shooting of the curved display screen under the pressing condition. The captured image is transmitted to the database and compared with qualified curved display screen images in the database. If no scratches, foreign objects, white spots, or light leakage are found, the product is considered qualified. If the above defects are found after comparison, the product is considered unqualified.

[0025] S5. Automatic unlocking and reset: The pressing mechanism automatically resets after the detection is completed.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention uses a reciprocating swing mechanism to drive the CCD image detection module to swing along the curvature of the curved display screen, which facilitates thorough imaging of the curved display screen, avoids blind spots in the imaging, and improves the accuracy of subsequent inspections. After the reciprocating swing mechanism swings and takes one image, the reciprocating swing mechanism and the pressing mechanism work together to drive the pressing mechanism to swing synchronously. At the same time, the pressing mechanism presses and takes images of the curved display screen, realizing imaging of the curved display screen under pressing conditions, which improves the accuracy of subsequent inspections.

[0028] 2. By setting up a lifting and clamping mechanism, the present invention simultaneously centers and clamps the curved display screen during the lifting process of the curved display disk, thereby achieving centering and clamping of the curved display screen, realizing precise positioning, and ensuring the accuracy of subsequent testing.

[0029] 3. The reciprocating swing mechanism of the present invention achieves two shots of the curved display screen during one reciprocating swing. After the reciprocating swing mechanism drives the pressing mechanism to swing once, the pressing mechanism automatically releases and resets to the initial position, realizing automatic locking swing and automatic reset of the pressing mechanism without manual control, and has a high degree of automation. Attached Figure Description

[0030] Figure 1 This is a three-dimensional view of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the No. 1 detection box of the present invention;

[0032] Figure 3 This is a perspective view of the lifting clamping mechanism, reciprocating swing mechanism and pressing mechanism of the present invention;

[0033] Figure 4 This is a three-dimensional bottom view of the lifting and clamping mechanism of the present invention;

[0034] Figure 5 This is an exploded view of the lifting and clamping mechanism of the present invention;

[0035] Figure 6 This is a perspective view of the reciprocating swing mechanism and pressing mechanism of the present invention;

[0036] Figure 7 This is a perspective view of the reciprocating swing mechanism of the present invention;

[0037] Figure 8 This is an exploded view of the reciprocating swing mechanism of the present invention;

[0038] Figure 9 This is a perspective view of the pressing mechanism of the present invention;

[0039] Figure 10 This is the invention Figure 9 Enlarged view of region A in the middle;

[0040] Figure 11 This is a flowchart of the method of the present invention.

[0041] In the diagram: 1. Hoist No. 1; 2. Frame; 3. Conveyor Belt; 4. Inspection Box No. 1; 5. Inspection Box No. 2; 6. Hoist No. 2; 7. Lifting and Clamping Mechanism; 71. Hydraulic Cylinder; 72. Lifting Plate; 73. Connecting Rod No. 1; 74. Support Plate; 75. Clamping Assembly; 751. Driven Pressure Wedge; 752. Clamping Rod; 753. Mounting Plate; 754. Limiting Rail; 755. Limiting Slider; 756. Spring No. 1 76. Spring; 77. Active compression wedge; 78. Fixed plate No. 1; 89. Reciprocating swing mechanism; 80. Power assembly; 811. Rotating rod; 812. Triangular gear block; 813. Servo motor; 814. Swing arm; 815. Gear; 816. Connecting shaft; 817. Fixing frame; 818. Rotating disk; 819. Limiting groove; 82. Lifting adjustment assembly; 821. Spring insert rod; 822. Sliding sleeve; 823. Installation 824. Arm; 825. Swing plate; 826. Fixing ring; 827. Connecting block; 9. Pressing mechanism; 91. Fixing rod; 92. Extrusion assembly; 921. Fixing plate No. 2; 922. Extrusion wheel; 923. Spring No. 2; 924. Telescopic rod; 925. Hinge seat No. 1; 926. Spring No. 3; 927. Hinge seat No. 2; 93. Arc-shaped movable rod; 94. Unlocking assembly; 941. Connecting plate; 942. U-shaped frame; 943. Arc-shaped extrusion head; 95. Automatic locking assembly; 951. No. 2 connecting rod; 952. Extrusion plate; 953. Mounting sleeve; 954. Arc-shaped pressure head; 955. Pull rod; 956. No. 4 spring; 957. Baffle; 958. Snap-fit ​​sleeve; 96. Limiting sleeve; 10. Top plate; 11. Electric slide rail; 12. Electric slider; 13. Side plate; 14. Arc-shaped hemispherical head; 15. CCD image detection module. Detailed Implementation

[0042] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0043] Example: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 The OLED display defect inspection production line includes a first elevator 1, a frame 2 on the left side of the first elevator 1, a conveyor belt 3 for transporting OLED displays on the frame 2, a second elevator 6 on the left side of the frame 2, and the conveyor belt 3 consisting of upper and lower layers. Working in conjunction with the first elevator 1 and the second elevator 6, it achieves the cyclical transport of curved displays and transfers defective products to the lower conveyor belt 3. A first inspection box 4 and a second inspection box 5 with identical structures are symmetrically arranged on the left and right sides of the middle of the frame 2. 2. A lifting and clamping mechanism 7 for clamping and fixing the OLED display is symmetrically arranged on the left and right sides of the middle section; a pressing mechanism 9 is arranged inside the No. 1 inspection box 4; two top plates 10 are symmetrically fixedly connected to the top surface inside the No. 1 inspection box 4, and electric slide rails 11 are fixedly connected to the bottom of the two top plates 10. Electric sliders 12 are slidably connected to the bottom of the electric slide rails 11. Side plates 13 are fixedly connected to the bottom of the electric sliders 12. A reciprocating swing mechanism 8 is arranged on the side plates 13. A CCD image detection module 15 is arranged on the reciprocating swing mechanism 8.

[0044] In use, the conveyor belt 3 is used to transport the curved OLED display screen. The first inspection box 4 and the second inspection box 5 simultaneously perform defect detection on the curved OLED display screen, realizing two inspections of the curved OLED display screen and improving the accuracy of the inspection. The lifting and clamping mechanism 7 is used to lift and center the curved OLED display screen. The reciprocating swing mechanism 8 drives the CCD image detection module 15 to reciprocate. The arc of the swing matches the arc of the curved OLED display screen, realizing no blind spots in the shooting of the curved OLED display screen. The combined use of the pressing mechanism 9 and the reciprocating swing mechanism 8 realizes that the pressing mechanism 9 swings synchronously during the swing process, realizing the shooting and inspection of the curved OLED display screen under the extrusion condition.

[0045] Please see Figure 2 , Figure 3 and Figure 4The lifting and clamping mechanism 7 includes a hydraulic cylinder 71 fixedly installed on the frame 2. The output end of the hydraulic cylinder 71 is fixedly connected to a lifting plate 72. A first connecting rod 73 is fixedly connected to the four corners of the top of the lifting plate 72. A support plate 74 for supporting the OLED display is fixedly connected to the top of the first connecting rod 73. The top of the support plate 74 is arc-shaped and is used to support the bottom of the curved display. A first fixing plate 77 is fixedly installed on the edge of the lifting plate 72. An active extrusion wedge 76 is fixedly connected to the top of the first fixing plate 77. A clamping assembly 75 is provided between the active extrusion wedge 76 and the frame 2.

[0046] Please see Figure 1 , Figure 4 and Figure 5 The clamping assembly 75 includes a limiting slide rail 754 fixedly connected to the frame 2. A limiting slider 755 is slidably connected to the limiting slide rail 754. The limiting slider 755 and the limiting slide rail 754 slide linearly to ensure accurate clamping of the curved display screen. A mounting plate 753 is fixedly connected to the top of the limiting slider 755. Two clamping rods 752 for centering and clamping the OLED display screen are symmetrically fixedly connected to the top of the mounting plate 753. Two driven pressure wedges 751 that cooperate with the active compression wedges 76 are symmetrically installed on the side of the mounting plate 753 away from the OLED display screen. A first spring 756 is fixedly connected between the side of the limiting slide rail 754 near the OLED display screen and the mounting plate 753. The first spring 756 is used to realize the automatic reset of the mounting plate 753 and the clamping rods 752.

[0047] In use, the conveyor belt 3 first transports the curved display screen to be inspected to the top of the lifting and clamping mechanism 7. The hydraulic cylinder 71 in the lifting and clamping mechanism 7 is activated, and the output end of the hydraulic cylinder 71 extends, driving the lifting plate 72 and the first connecting rod 73 on it to move upward. Simultaneously, the support plate 74 and the curved display screen on it move upward. During the upward movement, the first fixing plate 77 and the active pressing wedge 76 on it also move upward. The active pressing wedge 76 presses the driven pressure wedge 751, simultaneously driving the driven pressure wedge 751 and the mounting plate 753 on it to move in the center. At the same time, the clamping rod 752 is driven to center and clamp, realizing the centering, clamping and fixing of the curved display screen, and achieving precise positioning and clamping of the curved display screen.

[0048] Please see Figure 2 , Figure 3 , Figure 6 and Figure 7The reciprocating swing mechanism 8 includes a power component 81 and a lifting adjustment component 82. The power component 81 is mounted on the side plate 13, and the lifting adjustment component 82 is mounted on the power component 81. The power component 81 includes a support fixedly connected to the bottom front side of the side plate 13. A servo motor 813 is fixedly connected to the top of the support. A rotating disk 818 is fixedly connected to the output end of the servo motor 813. A rotating rod 811 is rotatably mounted on the top front side of the side plate 13. A swing arm 814 is fixedly sleeved at the front end of the rotating rod 811. A triangular tooth block 812 is fixedly mounted at the front end of the swing arm 814. A limit groove 819 is opened inside the swing arm 814. A limit pin is fixedly connected to the edge of the rotating disk 818 and slidably connected inside the limit groove 819. A fixing frame 817 is fixedly mounted on the front side of the support. A connecting shaft 816 rotatably passes through the top of the fixing frame 817. A gear 815 that meshes with the triangular tooth block 812 is fixedly sleeved at one end of the connecting shaft 816.

[0049] Please see Figure 6 , Figure 7 and Figure 8 The lifting adjustment assembly 82 includes a swing plate 824 fixedly installed at the other end of the connecting shaft 816. A sliding sleeve 822 is slidably installed on the swing plate 824. A spring rod 821 is provided on the sliding sleeve 822. An installation arm 823 is fixedly installed at the bottom front side of the sliding sleeve 822. A connecting block 826 is fixedly installed at the bottom of the installation arm 823. A fixing ring 825 is fixedly installed at the front side of the connecting block 826. The inner wall of the fixing ring 825 is fixedly connected to the outer wall of the CCD image detection module 15. An arc-shaped hemispherical head 14 is fixedly installed on the outside of the fixing ring 825. The CCD image detection module 15 is a CCD industrial camera.

[0050] After the curved display screen is precisely positioned and clamped using the lifting and clamping mechanism 7, the electric slide rail 11 and electric slider 12 are activated, driving the reciprocating swing mechanism 8 and its CCD image detection module 15 to move to the frontmost side of the curved display screen. Initially, the CCD image detection module 15 is in the rightmost position. At this time, the servo motor 813 is activated, and the output end of the servo motor 813 drives the rotating disk 818 to rotate, which in turn drives the limit pin on it to rotate. The limit pin slides up and down in the limit groove 819, thereby driving the swing arm 814 to swing from left to right, and at the same time driving the triangular tooth block 812 to swing from left to right. Since the triangular tooth block 812 meshes with the gear 815, it drives the gear 815 and its... The connecting shaft 816 rotates, synchronously driving the swing plate 824 and its mounting arm 823 to swing from right to left, indirectly driving the CCD image detection module 15 to take pictures from right to left, realizing the swinging picture of the curved display screen, avoiding the generation of blind spots, and improving the accuracy of subsequent detection. The position of the CCD image detection module 15 is adjustable. Pulling the handle in the spring plug 821 releases the locking and fixing of the spring plug 821 to the plug hole on the swing plate 824. At this time, the sliding sleeve 822 moves up and down along the direction of the swing plate 824, indirectly driving the CCD image detection module 15 to slide up and down, which makes it easy to adjust the position of the CCD image detection module 15 according to the position of the curved display screen.

[0051] Please see Figure 2 , Figure 3 , Figure 6 and Figure 9 The pressing mechanism 9 includes an unlocking component 94 located on the right side inside the first detection box 4. A fixing rod 91 is located on the left side inside the first detection box 4. A limiting sleeve 96 is fixedly installed at one end of the fixing rod 91. An arc-shaped movable rod 93 slides through the limiting sleeve 96. An automatic locking component 95 is located at the bottom end of the arc-shaped movable rod 93. A squeezing component 92 is located between the automatic locking component 95 and the fixing rod 91.

[0052] Please see Figure 2 , Figure 3 , Figure 6 , Figure 9 and Figure 10The unlocking component 94 includes a connecting plate 941 fixedly connected to the right side inside the first detection box 4. A U-shaped frame 942 is fixedly installed at the end of the connecting plate 941 away from the first detection box 4. Arc-shaped extrusion heads 943 are fixedly connected to both ends of the U-shaped frame 942. The automatic locking component 95 includes a locking cylinder 958 fixedly installed at the bottom end of the arc-shaped movable rod 93. Two mounting sleeves 953 are fixedly installed on the front and rear sides of the locking cylinder 958. The mounting sleeves 953 and the locking cylinder 958 share a common interior space. The movement is traversed by a pull rod 955. One end of the pull rod 955, located inside the snap-fit ​​sleeve 958, is fixedly installed with an arc-shaped pressure head 954. A baffle 957 is fixedly sleeved in the middle of the pull rod 955. A fourth spring 956 is sleeved in the middle of the pull rod 955. The fourth spring 956 is located between the baffle 957 and the inner wall of the mounting sleeve 953. A second connecting rod 951 is fixedly installed at the end of the pull rod 955 away from the arc-shaped pressure head 954. A compression plate 952 is fixedly installed at one end of the second connecting rod 951.

[0053] Please see Figure 2 , Figure 6 and Figure 9 The extrusion assembly 92 includes a second fixing plate 921 fixedly installed on the outer wall of the snap-fit ​​cylinder 958. Several telescopic rods 924 are movably inserted through the second fixing plate 921. A fixing seat is fixedly installed at the end of the telescopic rod 924 away from the second fixing plate 921. An extrusion wheel 922 is rotatably installed on the fixing seat. A second spring 923 is sleeved on the outside of the telescopic rod 924. The second spring 923 is located between the fixing seat and the second fixing plate 921. A second hinge seat 927 is hinged to the top left side of the snap-fit ​​cylinder 958. A first hinge seat 925 is hinged to the bottom of the fixing rod 91. A third spring 926 is fixedly installed between the first hinge seat 925 and the second hinge seat 927.

[0054] After the CCD image detection module 15 swings from right to left to capture an image, the arc-shaped hemispherical head 14 swings into the retaining cylinder 958. As it continues to swing, the arc-shaped hemispherical head 14 presses against the arc-shaped pressure head 954, simultaneously causing the two arc-shaped pressure heads 954 to move apart. This also causes the pull rod 955 and its baffle 957 to move apart, compressing the fourth spring 956. After the arc-shaped hemispherical head 14 passes the arc-shaped pressure head 954, the restoring force of the fourth spring 956 causes the arc-shaped pressure head 954 to move in a centered position. At this point, the straight surface of the arc-shaped pressure head 954 is aligned with the arc-shaped... When the hemispherical head 14 contacts, the arc-shaped hemispherical head 14 and the arc-shaped pressure head 954 are locked together. Driven by the reciprocating swing mechanism 8, the arc-shaped hemispherical head 14 and the arc-shaped pressure head 954 move from right to left, simultaneously driving the locking cylinder 958 and the second fixing plate 921 to move from right to left, and synchronously driving the telescopic rod 924 and the extrusion wheel 922 to move from left to right. The extrusion wheel 922 is used to extrude the surface of the curved display screen, and the CCD image detection module 15 is extruded while the display screen surface is photographed, realizing the defect detection of the display screen under the extrusion condition. When the third spring 926 is stretched synchronously, causing the pressing mechanism 9 to swing to the far right, the arc-shaped extrusion head 943 presses the extrusion plate 952, causing the extrusion plate 952 and the second connecting rod 951 on it to move apart, indirectly causing the arc-shaped pressure head 954 to move apart. At this time, the arc-shaped pressure head 954 releases its engagement with the arc-shaped hemispherical head 14. Under the restoring force of the third spring 926, the automatic locking component 95 and the extrusion component 92 move from right to left, returning to their initial positions. Thus, under the swing of the reciprocating swing mechanism 8, the CCD image detection module is realized. The CCD image detection module 15 is subjected to a first swing shot and a second swing shot under the extrusion condition, simulating different working conditions for display screen detection. After one round of swing shot, the electric slide rail 11 and the electric slider 12 drive the CCD image detection module 15 to move backward a certain distance, repeating the above swing shot, thus realizing a comprehensive image of the curved display screen surface. The captured images are transmitted to the database and compared with qualified products in the database. If the two are completely identical and there are no scratches, foreign objects, white spots, or light leakage, the product is qualified. If the above defects appear after comparison, it is unqualified.

[0055] Please see Figure 11 The OLED display defect detection method includes the following steps:

[0056] S1. Curved display screen loading: The curved display screen is loaded by conveying it using the frame 2 and the conveyor belt 3 on it;

[0057] S2. Lifting and Clamping: After the material is loaded into the No. 1 inspection box 4, the curved display screen is lifted and clamped by the lifting and clamping mechanism 7. The hydraulic cylinder 71 in the lifting and clamping mechanism 7 is activated, and the output end of the hydraulic cylinder 71 extends, driving the lifting plate 72 and the No. 1 connecting rod 73 on it to move upward. At the same time, the support plate 74 and the curved display screen on it move upward. During the upward movement, the No. 1 fixing plate 77 and the active pressing wedge 76 on it move upward. The active pressing wedge 76 presses the driven pressure wedge 751, and at the same time, the driven pressure wedge 751 and the mounting plate 753 on it move in the center. At the same time, the clamping rod 752 is centered and clamped, realizing the centering, clamping and fixing of the curved display screen.

[0058] S3. Single swing shooting: After centering and clamping, the servo motor 813 is started. The output end of the servo motor 813 drives the rotating disk 818 to rotate, and at the same time drives the limit pin on it to rotate. The limit pin slides up and down in the limit slide groove 819, thereby driving the swing arm 814 to swing from left to right, and at the same time driving the triangular tooth block 812 to swing from left to right. Since the triangular tooth block 812 meshes with the gear 815, it drives the gear 815 and the connecting shaft 816 on it to rotate, and synchronously drives the swing plate 824 and the mounting arm 823 on it to swing from right to left, indirectly driving the CCD image detection module 15 to shoot from right to left, realizing a single swing shooting of the curved display screen;

[0059] S4. Secondary Pressing and Swinging Shooting: After the first swinging shooting, the arc-shaped hemispherical head 14 swings into the snap-fit ​​cylinder 958. As it continues to swing, the arc-shaped hemispherical head 14 squeezes the arc-shaped pressure head 954. The simultaneous squeezing drives the two arc-shaped pressure heads 954 to move away from each other until the arc-shaped pressure head 954 and the straight surface snap into contact with the straight surface of the arc-shaped hemispherical head 14. At this time, driven by the swing of the reciprocating swing mechanism 8, the squeezing component 92 presses the surface of the curved display screen. During the pressing of the curved display screen, the curved display screen is simultaneously photographed, realizing the second shooting of the curved display screen under the pressing condition. The captured image is transmitted to the database and compared with the qualified curved display screen images in the database. If no scratches, foreign objects, white spots, or light leakage are found, the product is qualified. If the above defects are found after comparison, it is unqualified.

[0060] S5. Automatic unlocking and reset: After the test is completed, the pressing mechanism 9 will automatically reset.

[0061] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An OLED display defect detection production line, comprising a No. 1 hoist (1), characterized in that: The first hoist (1) is provided with a frame (2) on the left side, and a conveyor belt (3) for transporting OLED displays is provided on the frame (2). The second hoist (6) is provided on the left side of the frame (2). The first detection box (4) and the second detection box (5) with identical structures are symmetrically arranged in the middle of the frame (2). Also includes: A lifting clamping mechanism (7) symmetrically arranged in the middle of the frame (2) for clamping and fixing the OLED display screen; A pressing mechanism (9) is installed inside the No. 1 detection box (4); Two top plates (10) are symmetrically fixedly connected to the top surface inside the No. 1 detection box (4). The bottom of the two top plates (10) is fixedly connected to an electric slide rail (11). The bottom of the electric slide rail (11) is slidably connected to an electric slider (12). The bottom of the electric slider (12) is fixedly connected to a side plate (13). A reciprocating swing mechanism (8) is provided on the side plate (13). A CCD image detection module (15) is provided on the reciprocating swing mechanism (8).

2. The OLED display defect detection production line according to claim 1, characterized in that: The lifting and clamping mechanism (7) includes a hydraulic cylinder (71) fixedly installed on the frame (2). The output end of the hydraulic cylinder (71) is fixedly connected to a lifting plate (72). A first connecting rod (73) is fixedly connected to the four corners of the top of the lifting plate (72). A support plate (74) for supporting the OLED display is fixedly connected to the top of the first connecting rod (73). A first fixing plate (77) is fixedly installed on the edge of the lifting plate (72). An active squeezing wedge (76) is fixedly connected to the top of the first fixing plate (77). A clamping assembly (75) is provided between the active squeezing wedge (76) and the frame (2).

3. The OLED display defect detection production line according to claim 2, characterized in that: The clamping assembly (75) includes a limiting slide rail (754) fixedly connected to the frame (2), a limiting slider (755) slidably connected to the limiting slide rail (754), a mounting plate (753) fixedly connected to the top of the limiting slider (755), two clamping rods (752) for centering and clamping the OLED display screen symmetrically fixedly connected to the top of the mounting plate (753), two driven pressure wedges (751) cooperating with the active compression wedges (76) symmetrically installed on the side of the mounting plate (753) away from the OLED display screen, and a No. 1 spring (756) fixedly connected between the side of the limiting slide rail (754) close to the OLED display screen and the mounting plate (753).

4. The OLED display defect detection production line according to claim 1, characterized in that: The reciprocating swing mechanism (8) includes a power assembly (81) and a lifting adjustment assembly (82). The power assembly (81) is mounted on the side plate (13), and the lifting adjustment assembly (82) is mounted on the power assembly (81). The power assembly (81) includes a support fixedly connected to the bottom front side of the side plate (13). A servo motor (813) is fixedly connected to the top of the support. A rotating disk (818) is fixedly connected to the output end of the servo motor (813). A rotating rod (811) is rotatably mounted on the top front side of the side plate (13). 1) A swing arm (814) is fixedly sleeved at the front end. A triangular tooth block (812) is fixedly installed at the front end of the swing arm (814). A limit groove (819) is opened inside the swing arm (814). A limit pin that is slidably connected inside the limit groove (819) is fixedly connected to the edge of the rotating disk (818). A fixed frame (817) is fixedly installed on the front side of the support. A connecting shaft (816) is rotatably passed through the top of the fixed frame (817). A gear (815) that meshes with the triangular tooth block (812) is fixedly sleeved at one end of the connecting shaft (816).

5. The OLED display defect detection production line according to claim 4, characterized in that: The lifting adjustment assembly (82) includes a swing plate (824) fixedly installed at the other end of the connecting shaft (816). A sliding sleeve (822) is slidably installed on the swing plate (824). A spring rod (821) is provided on the sliding sleeve (822). An installation arm (823) is fixedly installed at the bottom front side of the sliding sleeve (822). A connecting block (826) is fixedly installed at the bottom of the installation arm (823). A fixing ring (825) is fixedly installed at the front side of the connecting block (826). The inner wall of the fixing ring (825) is fixedly connected to the outer wall of the CCD image detection module (15). An arc-shaped hemispherical head (14) is fixedly installed on the outside of the fixing ring (825).

6. The OLED display defect detection production line according to claim 1, characterized in that: The pressing mechanism (9) includes an unlocking component (94) located on the right side inside the first detection box (4), a fixing rod (91) located on the left side inside the first detection box (4), a limiting sleeve (96) fixedly installed at one end of the fixing rod (91), an arc-shaped movable rod (93) slidingly passing through the limiting sleeve (96), an automatic locking component (95) located at the bottom end of the arc-shaped movable rod (93), and a squeezing component (92) located between the automatic locking component (95) and the fixing rod (91).

7. The OLED display defect detection production line according to claim 6, characterized in that: The unlocking component (94) includes a connecting plate (941) fixedly connected to the right side inside the first detection box (4). A U-shaped frame (942) is fixedly installed at one end of the connecting plate (941) away from the first detection box (4). Arc-shaped extrusion heads (943) are fixedly connected to both ends of the U-shaped frame (942).

8. The OLED display defect detection production line according to claim 6, characterized in that: The automatic locking assembly (95) includes a snap-fit ​​cylinder (958) fixedly installed at the bottom of the arc-shaped movable rod (93). Two mounting sleeves (953) are fixedly installed on the front and rear sides of the snap-fit ​​cylinder (958). A pull rod (955) is movably passed through the interior of the mounting sleeves (953) and the snap-fit ​​cylinder (958). An arc-shaped pressure head (954) is fixedly installed at one end of the pull rod (955) inside the snap-fit ​​cylinder (958). A baffle (957) is fixedly sleeved in the middle of the pull rod (955). A fourth spring (956) is sleeved in the middle of the pull rod (955). The fourth spring (956) is located between the baffle (957) and the inner wall of the mounting sleeve (953). A second connecting rod (951) is fixedly installed at the end of the pull rod (955) away from the arc-shaped pressure head (954). A compression plate (952) is fixedly installed at one end of the second connecting rod (951).

9. The OLED display defect detection production line according to claim 8, characterized in that: The extrusion assembly (92) includes a second fixing plate (921) fixedly installed on the outer wall of the snap-fit ​​cylinder (958). Several telescopic rods (924) are movably passed through the second fixing plate (921). A fixing seat is fixedly installed at the end of the telescopic rod (924) away from the second fixing plate (921). An extrusion wheel (922) is rotatably installed on the fixing seat. A second spring (923) is sleeved on the outside of the telescopic rod (924). The second spring (923) is located between the fixing seat and the second fixing plate (921). A second hinge seat (927) is hinged to the top left side of the snap-fit ​​cylinder (958). A first hinge seat (925) is hinged to the bottom of the fixing rod (91). A third spring (926) is fixedly installed between the first hinge seat (925) and the second hinge seat (927).

10. An OLED display defect detection method, based on the OLED display defect detection production line according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Curved display screen loading: The curved display screen is loaded by conveying it using the frame (2) and the conveyor belt (3) on it; S2, Lifting and clamping: After the material is loaded into the No. 1 inspection box (4), the curved display screen is lifted by the lifting and clamping mechanism (7). During the lifting process, the curved display screen is simultaneously centered and clamped. S3, One swing shot: After centering and clamping, the reciprocating swing mechanism (8) drives the CCD image detection module (15) to perform one swing shot along the curve of the curved display screen; S4. Secondary press and swing shooting: After the first swing shooting, under the combined use of the reciprocating swing mechanism (8) and the pressing mechanism (9), the curved display screen is pressed and the curved display screen is simultaneously shot, realizing the curved display screen is shot again under the pressing condition. The shot image is transmitted to the database and compared with the qualified curved display screen image in the database. If there are no scratches, foreign objects, white spots and light leakage, the curved display screen is qualified. If the above phenomena occur, the display screen is unqualified. S5. Automatic unlocking and reset: After the detection is completed, the pressing mechanism (9) will automatically reset.

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