An automatic optical defect detection device for OLED display screen production

Abstract

The present application relates to the technical field of display screen detection, and specifically relates to an automatic optical defect detection device for OLED display screen production, which comprises an optical detection module, a detection table, a posture adjusting mechanism and a jig loading mechanism, and the detection table is provided with a plurality of loading grooves; a jig is installed in each loading groove; the jig loading mechanism comprises a loading frame, a flexible guide mechanism, a first jacking mechanism and a second jacking mechanism; after the detection table detects an OLED display screen with defects, the next batch of OLED display screens can be detected without resetting, thereby reducing the resetting steps of the detection table; meanwhile, the OLED display screens to be detected cannot be replaced in the prior art because the detection table is in an inclined state, but the jig loading mechanism can realize the replacement of OLED display screens in the inclined state of the detection table, thereby improving the subsequent detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of display screen inspection technology, specifically to an automatic optical defect inspection device for OLED display screen production. Background Technology

[0002] In practical use, OLED displays are observed from various angles, necessitating flawless performance from any viewing angle to guarantee superior display quality and user experience. However, current market testing methods for displays and industrial touchscreens primarily focus on frontal viewing angle testing, failing to comprehensively inspect from any direction, including frontal, left / right, and front / backward viewing angles. This results in defects visible to the naked eye at certain angles going undetected by the testing system, impacting product quality and user experience. Furthermore, current OLED testing equipment typically employs multiple cameras, requiring complex calibration and adjustments, leading to high equipment costs. The entire testing process often relies on manual intervention, resulting in low efficiency and failing to meet the high-precision, high-efficiency testing requirements of high-end OLED screen production.

[0003] Chinese patent application publication number CN109142226A discloses a multi-angle automatic optical inspection device for displays, which includes a machine base, a multi-directional moving mechanism, an inspection camera, a loading platform, a testing platform, a testing fixture, and multiple sets of motors for controlling forward, backward, left, and right rotation. A PLC controller is used to coordinate the control of each component. This patented solution utilizes a multi-directional moving mechanism and a rotatable platform to achieve multi-view inspection through a set of inspection cameras, effectively solving the problem of multi-angle defect testing in traditional solutions, saving inspection costs, and improving inspection efficiency. The entire inspection process requires no manual intervention. In existing technologies, when an OLED display is detected as defective while the inspection platform is tilted, the inspection platform needs to be restored to its initial position, i.e., reset to a horizontal state, before the loading mechanism can replace the OLED display on the inspection platform, resulting in low inspection efficiency. Summary of the Invention

[0004] To address the aforementioned issues, an automatic optical defect detection device for OLED display production is provided. Through the fixture loading mechanism, the inspection station can proceed to inspect the next batch of OLED displays without resetting after detecting a defective one, reducing the need for station resetting. Furthermore, since the inspection station is tilted, existing technologies cannot replace the OLED display to be inspected. The fixture loading mechanism enables the replacement of OLED displays while the inspection station is tilted, improving subsequent inspection efficiency.

[0005] To address the problems of existing technologies, this invention provides an automatic optical defect detection device for OLED display production, comprising: an optical inspection module; an inspection table having several loading slots for loading fixtures; a fixture for loading the OLED display to be inspected being detachably mounted in the loading slots; a posture adjustment mechanism for controlling the rotation and tilt of the inspection table; and a fixture loading mechanism comprising: a loading frame for placing the fixture loaded with the OLED display to be inspected; a flexible guide mechanism having several telescopic guide cables, the loading frame being movably mounted on the flexible guide mechanism along the telescopic guide cables; a primary lifting mechanism for driving the loading frame to move, wherein when the primary lifting mechanism drives the loading frame to move along the flexible guide mechanism to dock with the bottom of the inspection table, the loading frame docks with the loading slots; and a secondary lifting mechanism is further provided at the bottom of the loading frame for lifting the fixture inside the loading frame into the loading slots.

[0006] Preferably, the fixture loading mechanism further includes a horizontal support platform, one end of a telescopic guide cable is hinged to the bottom of the testing platform, and the other end of the telescopic guide cable movably passes through the support platform. A tightening mechanism connected to the end of the telescopic guide cable is provided on the support platform; when the attitude adjustment mechanism controls the testing platform to tilt relative to the support platform, the tightening mechanism tightens the telescopic guide cable.

[0007] Preferably, the tightening mechanism includes a take-up drum mounted on the bottom of the support platform and a take-up motor that drives the take-up drum to rotate.

[0008] Preferably, the output shaft of the winding motor is equipped with a torque sensor.

[0009] Preferably, the tightening mechanism includes a limiting block and a first elastic element. The limiting block is fixedly connected to the end of the telescopic guide cable, and the first elastic element is sleeved on the telescopic guide cable. The two ends of the first elastic element are fixedly connected to the limiting block and the support platform, respectively.

[0010] Preferably, the inner wall of the loading groove is provided with a locking block driven by electromagnetic force, and the side of the fixture is provided with a groove that matches the locking block.

[0011] Preferably, the primary lifting mechanism includes a cylinder and a ball joint disposed on the cylinder output shaft. The cylinder is disposed below the support platform, and the support platform is provided with a clearance hole for avoiding the cylinder output shaft.

[0012] Preferably, the secondary lifting mechanism includes a lifting rod, a second elastic element, and a drive plate. The lifting rod is vertically mounted on the loading frame and is driven by electromagnetic force. The drive plate is fixedly connected to the bottom of the lifting rod. The second elastic element is mounted on the lifting rod, and both ends of the second elastic element are fixedly connected to the drive plate and the bottom of the loading frame, respectively.

[0013] Preferably, the loading frame is provided with a guide groove for guiding the fixture, and the fixture is provided with protrusions that match the guide groove.

[0014] An automated optical defect detection method for OLED display manufacturing, applied to the aforementioned automated optical defect detection device for OLED display manufacturing, includes the following steps:

[0015] S1. The inspection platform is adjusted to the preset initial inspection angle by the attitude adjustment mechanism, and the loading frame is moved to the docking position at the bottom of the inspection platform by the flexible guide mechanism.

[0016] S2. The tilt angle of the inspection table is dynamically adjusted by the attitude adjustment mechanism to complete the multi-angle defect detection of the OLED display. The mounting plate is rotated by the rotating shaft, which drives multiple OLED displays on the inspection table to move sequentially to the area under the visual inspection camera for inspection.

[0017] S3. If a defect in the OLED display is detected, the secondary lifting mechanism is activated to drive the loading frame to rise to the bottom of the inspection platform, so that the loading frame docks with the fixture of the defective OLED display. The inspection platform is then controlled to release the fixture, so that the defective OLED display can descend to the bottom of the inspection platform along with the loading frame.

[0018] S4. The first-stage lifting mechanism drives the loading frame to reset to the initial position, and the defective OLED display is removed by the external transfer mechanism and the OLED display to be tested is loaded.

[0019] S5. Through the cooperation of the primary lifting mechanism and the secondary lifting mechanism, the fixture containing the OLED display to be tested is lifted into the empty loading slot of the testing table.

[0020] The advantages of this invention compared to the prior art are:

[0021] 1. The present invention, through the setting of the fixture loading mechanism, enables the inspection station to inspect the next batch of OLED displays without resetting after detecting a defective OLED display, thus reducing the step of resetting the inspection station; at the same time, since the inspection station is in a tilted state, the existing technology cannot replace the OLED display to be inspected, but the fixture loading mechanism enables the replacement of OLED displays in a tilted state, thereby improving the efficiency of subsequent inspections.

[0022] 2. Because the testing platform tilts within a certain range, the length of the telescopic guide cable changes accordingly, necessitating real-time adjustment of the cable's length. A take-up motor drives the take-up drum to automatically tighten or release the telescopic guide cable when the testing platform tilts, ensuring it remains under appropriate stress. This allows the fixture loading mechanism to flexibly adapt to different angles, enabling rapid OLED display replacement even without the testing platform resetting, thus improving testing efficiency. Simultaneously, the fixture loading mechanism prevents fixture wobbling or positional shifts, improving testing accuracy. A torque sensor monitors the torque of the take-up motor in real time, dynamically adjusting the tightening force of the telescopic guide cable based on the testing platform's tilt angle. This ensures the fixture remains under stable stress, preventing structural damage due to excessive force or fixture wobbling due to insufficient force.

[0023] Torque sensors transmit measured torque data to the backend control system, which then dynamically adjusts the operating state of the winding motor based on this data. This ensures the tension of the telescopic guide cable remains within the optimal range, achieving intelligent adjustment and improving the equipment's adaptability. By dynamically monitoring load changes in the winding motor, torque sensors prevent overload operation, reduce wear and tear on mechanical components, extend equipment lifespan, and enhance the overall safety and reliability of the equipment.

[0024] Because the testing platform tilts, traditional mechanical lifting mechanisms can experience vibrations or jamming during the lifting process of the loading frame due to frictional resistance or structural errors, affecting the stable transmission of the fixture. By using a cylinder drive and incorporating a ball joint on the cylinder output shaft, frictional resistance during lifting can be reduced, allowing the ball joint to slide at the bottom of the loading frame and resulting in a smoother lifting process.

[0025] 3. This invention features a ball joint on the output shaft of the primary lifting mechanism, which provides adaptive adjustment during the lifting of the fixture. Compared to traditional rigid connections, this compensates for positional deviations caused by the tilt of the testing table, improving equipment compatibility and reducing debugging costs. The ball joint structure also ensures a more uniform distribution of lifting force, reducing wear and tear on the equipment from lateral forces generated during lifting, improving equipment durability, extending service life, and reducing maintenance costs. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of an automated optical defect detection device for OLED display production.

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of an OLED screen before it is loaded into an automated optical defect detection device used in OLED display production.

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0029] Figure 4 This is a three-dimensional structural diagram of the loading frame being lifted when the inspection table is tilted in an automatic optical defect inspection device for OLED display production.

[0030] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0031] Figure 6 This is a three-dimensional structural diagram of the loading frame falling when the inspection table is tilted in an automatic optical defect inspection device for OLED display production.

[0032] Figure 7 yes Figure 6 Enlarged view of point C in the middle.

[0033] Figure 8 This is a three-dimensional structural diagram of the jig being fed into the loading frame in an automatic optical defect detection device for OLED display production.

[0034] Figure 9 This is a three-dimensional structural diagram of an automated optical defect detection device for OLED display production, showing the tilting of the inspection table and the replacement of the OLED screen.

[0035] Figure 10 This is a three-dimensional structural diagram of the inspection stage and attitude adjustment mechanism in an automatic optical defect inspection device for OLED display production.

[0036] Figure 11 This is a three-dimensional structural diagram of a support platform in an automated optical defect detection device for OLED display production.

[0037] Figure 12 This is a three-dimensional structural diagram of the loading frame and fixture in an automated optical defect detection device for OLED display production.

[0038] The numbers on the map are:

[0039] 1. Optical inspection module; 11. Visual inspection camera; 2. Inspection table; 21. Support plate; 211. Rotating shaft; 212. Clearance groove; 22. Mounting plate; 23. Guide block; 3. Loading groove; 31. Fixture; 311. Groove; 312. Protrusion; 32. Locking block; 4. Attitude adjustment mechanism; 5. Fixture loading mechanism; 51. Loading frame; 511. Secondary lifting mechanism; 5111. Lifting rod; 5112. Secondary lifting mechanism; Elastic element; 5113, drive plate; 512, guide groove; 513, mounting hole; 52, flexible guide mechanism; 521, telescopic guide cable; 53, first-stage lifting mechanism; 531, cylinder; 5311, ball head; 54, support platform; 541, tightening mechanism; 5411, winding drum; 5412, winding motor; 5413, torque sensor; 5414, limit block; 5415, first elastic element; 542, clearance hole. Detailed Implementation

[0040] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figures 8 to 11 The following describes an automated optical defect inspection device for OLED display production: an optical inspection module 1; an inspection stage 2, the inspection stage 2 having several loading slots 3 for loading fixtures 31; fixtures 31 for loading the OLED display to be inspected are detachably mounted in the loading slots 3; a posture adjustment mechanism 4 for controlling the rotation and tilt of the inspection stage 2; and a fixture 31 loading mechanism, the fixture 31 loading mechanism including: a loading frame 51 for placing the fixtures 31 loaded with the OLED display to be inspected; and a flexible guiding mechanism 52. The structure 52 has several telescopic guide cables 521, and the loading frame 51 is movably mounted on the flexible guide mechanism 52 along the telescopic guide cables 521; a primary lifting mechanism 53 is used to drive the loading frame 51 to move. When the primary lifting mechanism 53 drives the loading frame 51 to move along the flexible guide mechanism 52 to dock with the bottom of the detection table 2, the loading frame 51 docks with the loading groove 3; a secondary lifting mechanism 511 is also provided at the bottom of the loading frame 51, which is used to lift the fixture 31 in the loading frame 51 into the loading groove 3.

[0042] The testing platform 2 includes a support plate 21 and a mounting plate 22. A rotating shaft 211 is provided in the center of the support plate 21. The mounting plate 22 is sleeved on the rotating shaft 211. The loading groove 3 is provided on the mounting plate 22. The support plate 21 is provided with a clearance groove 212 that matches the loading groove 3.

[0043] The optical inspection module 1 is equipped with a vision inspection camera 11. One of the loading slots 3 on the inspection table 2 is located below the vision inspection camera 11. Through the cooperation of the rotating shaft 211 and the mounting plate 22, the mounting plate 22 can rotate around the rotating shaft 211, so that the fixture 31 in the loading slot 3 can move alternately, thereby placing the OLED display to be inspected on the fixture 31 below the vision inspection camera 11. With the help of the attitude adjustment mechanism 4, the inspection table 2 can be rotated and tilted, which facilitates the vision inspection camera 11 to perform multi-angle inspection of the OLED display.

[0044] In existing technology, when a defect is detected in an OLED display while the inspection table 2 is tilted, the inspection table 2 needs to be restored to its initial position, i.e., it needs to be reset to a horizontal state before the OLED display on the inspection table 2 can be replaced by the loading mechanism, resulting in low inspection efficiency. This device, however, uses a loading mechanism with fixture 31. After replacing two OLED displays on the inspection table 2, the first-stage lifting mechanism 53 drives the loading frame 51, causing the loading frame 51 to move along the flexible guide mechanism 52 to the bottom of the inspection table 2. At this point, the loading frame 51 aligns with the loading slot 3, and the second-stage lifting mechanism... The lifting mechanism 511 moves the loading frame 51 to below the fixture 31 in the loading slot 3. At this time, the loading slot 3 lowers the fixture 31 into the loading frame 51. The secondary lifting mechanism 511 retracts, moving the loading frame 51 and fixture 31 to below the inspection table 2. At this time, the primary lifting mechanism 53 retracts, causing the loading frame 51 to reset. The fixture 31 in the loading slot 3 is replaced by an external transmission mechanism, robot, or transfer mechanism. By repeating the above steps, the replaced OLED display is moved to the empty loading slot 3 on the inspection table 2, thereby completing the replacement of the OLED display and improving the inspection efficiency.

[0045] Through the above process, after the inspection station 2 detects a defective OLED display, it can proceed to inspect the next batch of OLED displays without resetting, reducing the resetting steps of the inspection station 2. At the same time, since the inspection station 2 is in a tilted state, the existing technology cannot replace the OLED display to be inspected. The loading mechanism of the fixture 31 enables the replacement of the OLED display in the tilted state of the inspection station 2, improving the subsequent inspection efficiency.

[0046] It should be noted that the testing station 2 does not need to be reset, but the testing station 2 will complete all angles of the OLED display testing process, but it does not need to return to start from the original steps again.

[0047] The adjustable angles of the inspection station 2 do not include all angles. When the OLED display is close to horizontal (0° to 15°), the reflected light from the screen may be too straight, making it difficult to clearly show defects. Therefore, this range of angles needs to be avoided. At the same time, when the OLED display is close to vertical (75° to 90°), the reflected light from the OLED display cannot fully enter the field of view of the visual inspection module, which can easily lead to blind spots and limit the function of the visual inspection camera 11. Therefore, the inspection angle range of the inspection station 2 is 15° to 75°. Within this range, the flexible guide mechanism 52 and the fixture 31 loading mechanism can work together to ensure that the inspection station 2 can flexibly change the fixture 31 at different angles.

[0048] The attitude adjustment mechanism 4 consists of two rotating frames with their axes perpendicular to each other. The detection table 2 is mounted on the top of one of the rotating frames, thereby controlling the rotation and tilt of the detection table 2.

[0049] like Figures 1 to 7 As shown: The loading mechanism of the fixture 31 also includes a horizontal support platform 54. One end of the telescopic guide cable 521 is hinged to the bottom of the detection platform 2, and the other end of the telescopic guide cable 521 movably passes through the support platform 54. The support platform 54 is provided with a tightening mechanism 541 connected to the end of the telescopic guide cable 521. When the attitude adjustment mechanism 4 controls the detection platform 2 to tilt relative to the support platform 54, the tightening mechanism 541 tightens the telescopic guide cable 521.

[0050] The support platform 54 ensures that the OLED display remains stably supported during replacement, providing stable support for the testing platform 2. A section of the telescopic guide cable 521 passes through the support platform 54, and under the action of the tightening mechanism 541, the telescopic guide cable 521 remains taut. This facilitates the sliding of the loading frame 51 along the telescopic guide cable 521, allowing the loading frame 51 to automatically adapt to changes in the angle of the testing platform 2 and remain stable, ensuring a smooth replacement of the OLED display.

[0051] like Figures 2 to 5 As shown: The tightening mechanism 541 includes a take-up drum 5411 mounted on the bottom of the support platform 54 and a take-up motor 5412 that drives the take-up drum 5411 to rotate.

[0052] Because the testing platform 2 tilts within a certain range, the length of the telescopic guide cable 521 changes with the tilt of the testing platform 2, thus requiring real-time adjustment of the telescopic guide cable 521's length. The take-up motor 5412 drives the take-up drum 5411, which in turn causes the telescopic guide cable 521 to automatically tighten or release when the testing platform 2 tilts, ensuring that the telescopic guide cable 521 is always under appropriate stress. This allows the fixture 31 loading mechanism to flexibly adapt to different angles, enabling rapid replacement of the OLED display screen without the testing platform 2 resetting, thus improving testing efficiency. Simultaneously, the fixture 31 loading mechanism prevents the fixture 31 from shaking or shifting position, improving testing accuracy.

[0053] like Figures 2 to 5 As shown: The output shaft of the winding motor 5412 is equipped with a torque sensor 5413.

[0054] The torque sensor 5413 monitors the torque of the winding motor 5412 in real time, and dynamically adjusts the tightening force of the telescopic guide cable 521 according to the tilt angle of the detection table 2 to ensure that the fixture 31 is in a stable stress state and prevent structural damage caused by excessive force or shaking of the fixture 31 due to insufficient force.

[0055] The torque sensor 5413 transmits the measured torque data to the backend control system. Based on this data, the control system dynamically adjusts the operating state of the take-up motor 5412, ensuring the tension of the telescopic guide cable 521 remains within the optimal range. This intelligent adjustment enhances the equipment's adaptability. By dynamically monitoring the load changes of the take-up motor 5412 using the torque sensor 5413, overload operation is avoided, reducing wear and tear on mechanical components, extending the equipment's lifespan, and improving the overall safety and reliability of the equipment.

[0056] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown: The tightening mechanism 541 includes a limiting block 5414 and a first elastic element 5415. The limiting block 5414 is fixedly connected to the end of the telescopic guide cable 521. The first elastic element 5415 is sleeved on the telescopic guide cable 521, and the two ends of the first elastic element 5415 are fixedly connected to the limiting block 5414 and the support platform 54, respectively.

[0057] Traditional rigid tightening methods may damage the telescopic guide cable 521 due to excessive instantaneous tension when the testing table 2 is tilted. The first elastic element 5415 provides a buffering effect; when the testing table 2 changes angle, the first elastic element 5415 absorbs part of the instantaneous impact force, reducing direct impact on the limiting block 5414 and the support platform 54, preventing equipment damage, and improving the reliability and durability of the equipment.

[0058] The first elastic element 5415 automatically adjusts the tension at different angles to ensure that the telescopic guide cable 521 is always in a reasonable tension state, thereby ensuring the stability of the fixture 31 and preventing swaying due to insufficient tension or structural deformation due to excessive tension.

[0059] In addition to the above structure, a rotatable spring can also be installed at the bottom of the support platform 54 to connect the end of the telescopic guide cable 521 to the end of the spring. This can also serve to adjust the telescopic guide cable 521. When the length of the telescopic guide cable 521 changes, it will drive the spring to rotate. The elasticity of the spring will tighten the telescopic guide cable 521, thereby ensuring the tension of the telescopic guide cable 521.

[0060] like Figures 2 to 4 , Figure 10 and Figure 12 As shown: The inner wall of the loading groove 3 is provided with a locking block 32 driven by electromagnetic force, and the side of the fixture 31 is provided with a groove 311 that matches the locking block 32.

[0061] When the fixture 31 is placed onto the loading slot 3, the loading slot 3 needs to position the fixture 31 to facilitate the subsequent replacement of the OLED display. Traditional mechanical fixing methods (such as bolts or clips) may loosen due to vibration or repeated operation during high-frequency testing, affecting the positioning accuracy of the OLED display. By using an electromagnetically driven locking block 32, the fixture 31 can be automatically locked after placement, ensuring a tight fit between the fixture 31 and the loading slot 3. This ensures that the OLED display will not experience testing errors due to shaking during testing, improving testing stability and accuracy.

[0062] The electromagnetically driven locking block 32 enables remote automatic control. Simply energizing the block generates magnetism, allowing it to slide along the inner wall of the loading slot 3, thus securing or releasing the fixture 31. This simplifies the loading and unloading process, reduces manual intervention, and improves the automation level of the testing equipment, thereby increasing production efficiency. This invention utilizes the electromagnetically driven locking block 32, which can be linked with an automated control system. Combined with a PLC or robot control system, it achieves automatic detection, automatic fixture 31 replacement, automatic locking, and release, making it suitable for intelligent manufacturing production lines and further enhancing the intelligence level of OLED display testing equipment.

[0063] like Figure 2 , Figure 4 and Figure 11 As shown: The first-stage lifting mechanism 53 includes a cylinder 531 and a ball head 5311 disposed on the output shaft of the cylinder 531. The cylinder 531 is disposed below the support platform 54, and the support platform 54 is provided with a clearance hole 542 for avoiding the output shaft of the cylinder 531.

[0064] Because the testing platform 2 tilts, traditional mechanical lifting structures may experience vibration or jamming during the lifting process of the loading frame 51 due to frictional resistance or structural errors, affecting the stable transmission of the fixture 31. By using a cylinder 531 for driving and setting a ball head 5311 on the output shaft of the cylinder 531, the frictional resistance during lifting can be reduced, allowing the ball head 5311 to slide at the bottom of the loading frame 51, making the lifting process more stable.

[0065] Due to the unique design of the ball joint 5311, it possesses a certain degree of self-adjustment capability during the lifting process. Compared to traditional rigid connection methods, it can compensate for positional deviations caused by the tilt of the testing platform 2, improving equipment compatibility and reducing debugging costs. The ball joint 5311 structure also ensures a more uniform distribution of lifting force, reducing wear and tear on the equipment caused by lateral forces generated during lifting, improving equipment durability, extending service life, and reducing maintenance costs.

[0066] By setting the clearance hole 542, the overall equipment structure can be made more compact, the equipment volume can be reduced, and the space utilization rate can be improved while ensuring the lifting stroke of the cylinder 531. This makes it suitable for large-scale deployment in automated production lines and enhances the industrial application value of the equipment.

[0067] like Figure 2 , Figure 4 , Figure 6 and Figure 12 As shown: The secondary lifting mechanism 511 includes a lifting rod 5111, a second elastic element 5112, and a drive plate 5113. The lifting rod 5111 is vertically mounted on the loading frame 51 and is driven by electromagnetic force. The drive plate 5113 is fixedly connected to the bottom of the lifting rod 5111. The second elastic element 5112 is mounted on the lifting rod 5111, and both ends of the second elastic element 5112 are fixedly connected to the drive plate 5113 and the bottom of the loading frame 51, respectively.

[0068] The lifting rod 5111 is electromagnetically driven, and its position can be precisely controlled by adjusting the current or pulse signal, making the lifting height of the fixture 31 inside the loading frame 51 more precise and controllable. Furthermore, the electromagnetic drive method facilitates integration with sensors and intelligent control systems to achieve automated adjustment of the lifting height without manual intervention. This is suitable for intelligent OLED display inspection equipment, improving the automation level of the production line.

[0069] Traditional fixed rigid lifting structures may lead to the accumulation of docking errors, affecting the installation accuracy of fixture 31. By setting a drive plate 5113 at the bottom of the lifting rod 5111 and utilizing the elastic restoring force of the second elastic element 5112, the installation error caused by the slight displacement of fixture 31 can be automatically compensated, improving docking accuracy, reducing the requirements for equipment assembly accuracy, and improving equipment compatibility.

[0070] The second elastic element 5112 effectively reduces vibrations generated during the lifting and releasing of the fixture 31, thereby improving the overall stability of the testing equipment and increasing testing accuracy. Furthermore, the secondary lifting mechanism 511 uses a vertically arranged lifting rod 5111 and a drive plate 5113 at the bottom of the loading frame 51, which, while fulfilling the elastic buffer function, minimizes space occupation, improves the equipment's compactness, and is suitable for large-scale integration into automated OLED testing equipment, thus increasing the space utilization of the production line.

[0071] like Figure 2 , Figure 4 , Figure 6 , Figure 8 , Figures 10 to 12 As shown: The loading frame 51 is provided with a guide groove 512 for guiding the fixture 31, and the fixture 31 is provided with a protrusion 312 that matches the guide groove 512.

[0072] The cooperation between the guide groove 512 and the protrusion 312 ensures that the jig 31 is stably positioned and aligned with the detection position within the loading frame 51, avoiding detection errors caused by jig 31 offset. This allows the jig 31 within the loading frame 51 to be stably transferred to the loading groove 3, thereby ensuring the accuracy and reliability of visual inspection.

[0073] The testing table 2 has a mounting groove that matches the guide groove 512, which facilitates the docking of the fixture 31 with the testing table. Anti-slip strips (not shown in the figure) are provided inside the loading frame 51 to ensure that the fixture 31 does not slide out of the loading frame 51. It should be noted that the guide groove 512 has both a vertical and a horizontal guide groove 512. The vertical guide groove 512 is used for lifting and lowering the fixture 31, while the horizontal guide groove 512 is used for replacing the OLED display on the support table 54.

[0074] like Figure 2 , Figure 4 , Figure 6 , Figure 10 and Figure 11As shown: both the top of the testing platform 2 and the top of the support platform 54 are provided with conical guide blocks 23. The number of guide blocks 23 is the same as the number of telescopic guide cables 521 and they correspond one-to-one. The loading frame 51 is provided with mounting holes 513 that match the guide blocks 23.

[0075] By setting the tapered guide block 23 and the mounting hole 513, when the loading frame 51 approaches the inspection table 2, the tapered guide block 23 can automatically guide the loading frame 51 to slide into the correct position, ensuring the height accuracy when the loading frame 51 docks with the inspection table 2, thereby improving the docking accuracy between the loading frame 51 and the loading slot 3, thus ensuring the lifting effect of the subsequent fixture 31, thereby improving the stability and accuracy of OLED display inspection.

[0076] Because the telescopic guide cable 521 is a flexible structure, the position of the loading frame 51 may have some error when it slides along the telescopic guide cable 521. The tapered guide block 23 provides a clear alignment guide, and the loading frame 51 can quickly slide into the correct detection position when it is replaced, avoiding repeated adjustments due to improper alignment, reducing loading time, and improving the overall efficiency of the OLED display detection production line.

[0077] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figures 8 to 11 As shown: An automatic optical defect detection method for OLED display manufacturing, applied to the aforementioned automatic optical defect detection device for OLED display manufacturing, includes the following steps:

[0078] S1. The posture adjustment mechanism 4 adjusts the detection table 2 to the preset initial detection angle, and the flexible guide mechanism 52 moves the loading frame 51 to the docking position at the bottom of the detection table 2.

[0079] S2. The tilt angle of the inspection stage 2 is dynamically adjusted by the attitude adjustment mechanism 4 to complete the multi-angle defect detection of the OLED display. The mounting plate 22 is rotated by the rotating shaft 211, which drives the multiple OLED displays on the inspection stage 2 to move sequentially to the area below the visual inspection camera 11 for inspection.

[0080] S3. If a defect in the OLED display is detected, the secondary lifting mechanism 511 is activated to drive the loading frame 51 to rise to the bottom of the inspection platform 2, so that the loading frame 51 docks with the fixture 31 of the defective OLED display. The inspection platform 2 is then controlled to release the fixture 31, so that the defective OLED display can descend to the bottom of the inspection platform 2 along with the loading frame 51.

[0081] S4. The first-stage lifting mechanism 53 drives the loading frame 51 to reset to the initial position, removes the defective OLED display through the external transmission mechanism, and loads the OLED display to be tested.

[0082] S5. Through the cooperation of the primary lifting mechanism 53 and the secondary lifting mechanism 511, the fixture 31 containing the OLED display to be tested is lifted into the empty loading slot 3 of the testing table 2.

[0083] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection 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 all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An automated optical defect detection device for OLED display manufacturing, comprising: Optical inspection module (1); The testing platform (2) is provided with several loading slots (3) for loading fixtures (31); The loading slot (3) is detachably fitted with a fixture (31) for loading the OLED display to be tested. The attitude adjustment mechanism (4) is used to control the rotation and tilt of the testing table (2); The feature is that it further includes a fixture loading mechanism (5), which includes a loading frame (51) for placing a fixture (31) loaded with the OLED display to be tested. A flexible guide mechanism (52) having a plurality of telescopic guide cables (521), wherein a loading frame (51) is movably mounted on the flexible guide mechanism (52) along the telescopic guide cables (521); The first-stage lifting mechanism (53) is used to drive the loading frame (51) to move. When the first-stage lifting mechanism (53) drives the loading frame (51) to move along the flexible guide mechanism (52) to dock with the bottom of the detection table (2), the loading frame (51) docks with the loading groove (3). The bottom of the loading frame (51) is also provided with a secondary lifting mechanism (511), which is used to lift the jig (31) in the loading frame (51) into the loading slot (3); The testing station (2) includes a support plate (21) and a mounting plate (22). A rotating shaft (211) is provided in the center of the support plate (21), and the mounting plate (22) is sleeved on the rotating shaft (211).

2. The automatic optical defect detection device for OLED display production according to claim 1, characterized in that, The fixture loading mechanism (5) also includes a horizontal support platform (54), one end of a telescopic guide cable (521) is hinged to the bottom of the testing platform (2), and the other end of the telescopic guide cable (521) moves through the support platform (54). The support platform (54) is provided with a tightening mechanism (541) connected to the end of the telescopic guide cable (521). When the attitude adjustment mechanism (4) controls the testing platform (2) to tilt relative to the support platform (54), the tightening mechanism (541) tightens the telescopic guide cable (521).

3. The automatic optical defect detection device for OLED display production according to claim 2, characterized in that, The tightening mechanism (541) includes a take-up drum (5411) mounted on the bottom of the support platform (54) and a take-up motor (5412) that drives the take-up drum (5411) to rotate.

4. The automatic optical defect detection device for OLED display production according to claim 3, characterized in that, The output shaft of the winding motor (5412) is equipped with a torque sensor (5413).

5. An automatic optical defect detection device for OLED display production according to claim 2, characterized in that, The tightening mechanism (541) includes a limiting block (5414) and a first elastic element (5415). The limiting block (5414) is fixedly connected to the end of the telescopic guide cable (521), and the first elastic element (5415) is sleeved on the telescopic guide cable (521). The two ends of the first elastic element (5415) are fixedly connected to the limiting block (5414) and the support platform (54) respectively.

6. The automatic optical defect detection device for OLED display production according to claim 1, characterized in that, The inner wall of the loading slot (3) is provided with a locking block (32) driven by electromagnetic force, and the side of the fixture (31) is provided with a groove (311) that matches the locking block (32).

7. The automatic optical defect detection device for OLED display production according to claim 1, characterized in that, The first-stage lifting mechanism (53) includes a cylinder (531) and a ball head (5311) disposed on the output shaft of the cylinder (531). The cylinder (531) is disposed below the support platform (54), and the support platform (54) is provided with a clearance hole (542) for avoiding the output shaft of the cylinder (531).

8. The automatic optical defect detection device for OLED display production according to claim 1, characterized in that, The secondary lifting mechanism (511) includes a lifting rod (5111), a second elastic element (5112), and a drive plate (5113). The lifting rod (5111) is vertically mounted on the loading frame (51). The lifting rod (5111) is driven by electromagnetic force. The drive plate (5113) is fixedly connected to the bottom of the lifting rod (5111). The second elastic element (5112) is mounted on the lifting rod (5111), and both ends of the second elastic element (5112) are fixedly connected to the drive plate (5113) and the bottom of the loading frame (51), respectively.

9. An automatic optical defect detection device for OLED display manufacturing according to claim 1, characterized in that, The loading frame (51) is provided with a guide groove (512) for guiding the fixture (31), and the fixture (31) is provided with a protrusion (312) that matches the guide groove (512).

10. An automatic optical defect detection method for OLED display manufacturing, applied to the automatic optical defect detection device for OLED display manufacturing as described in any one of claims 1-9, characterized in that, It includes the following steps: S1. The inspection table (2) is adjusted to the preset initial inspection angle by the posture adjustment mechanism (4), and the loading frame (51) is moved to the docking position at the bottom of the inspection table (2) by the flexible guide mechanism (52). S2. The tilt angle of the inspection table (2) is dynamically adjusted by the posture adjustment mechanism (4) to complete the multi-angle defect detection of the OLED display screen. The mounting plate (22) is rotated by the rotating shaft (211) to drive the multiple OLED displays on the inspection table (2) to move in sequence to the area below the visual inspection camera (11) for inspection. S3. If a defect in the OLED display is detected, the secondary lifting mechanism (511) is activated to drive the loading frame (51) to rise to the bottom of the inspection platform (2), so that the loading frame (51) docks with the fixture (31) of the defective OLED display, and the inspection platform (2) is controlled to release the fixture (31), so that the defective OLED display can descend to the bottom of the inspection platform (2) along with the loading frame (51). S4. The first-stage lifting mechanism (53) drives the loading frame (51) to reset to the initial position, removes the defective OLED display and loads the OLED display to be tested through the external transmission mechanism; S5. Through the cooperation of the first-level lifting mechanism (53) and the second-level lifting mechanism (511), the fixture (31) containing the OLED display to be tested is lifted into the empty loading slot (3) of the testing table (2).

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