Liquid crystal display screen quality detection device and method

Abstract

The invention relates to a liquid crystal display screen quality detection device and method, and the device comprises an operation table which is rotatably provided with a transmission belt, and the transmission belt is provided with a plurality of driving frames; the bearing plate is rotationally arranged at the top of the driving frame, and the bearing plate bears a display screen; the number of the portal frames is at least two, the portal frames are arranged on the operation table corresponding to the upper portion of the conveying belt, and swing arms are rotationally arranged on the portal frames; and the detection mechanism is used for detecting the display screen. According to the invention, the overall image and edge quality of the liquid crystal display screen can be comprehensively detected, the overall structural design is compact and reasonable, and the detection efficiency and accuracy are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid crystal display screen quality detection, and in particular to a liquid crystal display screen quality detection device and method. BACKGROUND

[0002] At present, liquid crystal display screens are indispensable key components in modern electronic equipment. In order to ensure product quality, strict quality detection is required during production. The existing liquid crystal display screen quality detection method mainly relies on manual inspection and simple automatic equipment, which can meet the basic needs, but the efficiency and accuracy still need to be improved.

[0003] For the quality detection of liquid crystal display screens, the common solution includes using a camera to capture images and identifying defects on the screen through image processing technology. The main defect of the above prior art is that the image capture range of the camera is limited and cannot fully cover all areas of the entire display screen, especially the details of the edge part are difficult to accurately capture. There is also a problem of insufficient flexibility, especially when dealing with display screens of different sizes and shapes, it is complex and time-consuming to adjust the equipment. When detecting liquid crystal display screens in batches, the detection angle is single and cannot adapt to the horizontal angle of the liquid crystal display screen during transmission, which easily leads to missed detection areas, affecting the comprehensiveness and accuracy of the detection.

[0004] For the related technology in the above, it is necessary to propose a liquid crystal display screen quality detection device and method to solve one of the technical problems above. SUMMARY

[0005] In order to solve one of the technical problems above, the present application provides a liquid crystal display screen quality detection device and method.

[0006] The liquid crystal display screen quality detection device and method provided by the present application adopts the following technical solution: A liquid crystal display screen quality detection device, comprising: An operation table, a transmission belt is rotatably arranged on the operation table, and a plurality of driving frames are arranged on the transmission belt; A bearing plate rotatably arranged on the top of the driving frame, the bearing plate bearing the display screen; At least two gantry frames are arranged on the operation table above the transmission belt, and a swing arm is rotatably arranged on the gantry frame; and The detection mechanism is used for detecting the display screen and comprises a combination frame, a support frame, a plurality of first cameras and second cameras used for image acquisition of the display screen, the combination frame is arranged at the end of the swing arm, the first camera is arranged at the bottom of the combination frame and is used for acquiring the overall image of the display screen, the support frame is arranged at the inner side of the gantry frame, and the second camera is arranged at one end of the support frame and is close to the upper surface of the bearing plate, and is used for detecting the quality at the edge of the display screen when the bearing plate passes through the gantry frame.

[0007] By adopting the above technical scheme, the overall image and the quality at the edge of the display screen are comprehensively detected, the transmission belt on the operation table drives the driving frame to move, the bearing plate sequentially passes through below the plurality of gantry frames, and the driving frame can change the levelness of the bearing plate horizontally when passing below the plurality of gantry frames, so that each display screen to be detected can be fully detected, the combination frame is arranged at the end of the swing arm, the first camera is located at the bottom of the combination frame and can be flexibly adjusted in angle, so that the overall image of the display screen is effectively acquired, the support frame is arranged at the inner side of the gantry frame, and the second camera is fixed at one end of the support frame, so that the edge part of the display screen can be accurately photographed when the bearing plate passes through the gantry frame, and accurate detection of local details is realized.

[0008] Optionally, the bottom of the combination frame is provided with a mounting groove on the front and rear surfaces, the first camera is arranged in the mounting groove, a limiting plate is arranged outside the first camera, a magnetic piece is arranged on the outer side of the limiting plate, an electromagnet is arranged on the inner wall of the mounting groove, and the electromagnet is magnetically attracted to the magnetic piece when powered.

[0009] By adopting the above technical scheme, the first camera can be stably installed in the mounting groove and quickly replaced and positioned through cooperation of the limiting plate and the magnetic piece, so that the flexibility and maintenance convenience of the detection device are improved; meanwhile, power control of the electromagnet makes the position adjustment of the first camera more convenient, and the reliability and accuracy of the detection process are enhanced.

[0010] Optionally, the support frame comprises a support frame, an extension rod and a support seat, the support frame is arranged at the inner side of the gantry frame, a driving cylinder is arranged in the support frame, the extension rod is horizontally arranged at one side of the support frame, the rod tail of the extension rod is arranged on the output end of the driving cylinder, one end of the support seat is connected with the rod head of the extension rod, and the second camera is slidingly arranged at one side of the support seat above the bearing plate.

[0011] By adopting the technical scheme, the design of the support frame enables the second camera to move flexibly, ensuring that the quality detection of the edge of the display screen is more accurate and comprehensive, the support frame is arranged on the inner side of the gantry and is internally provided with a driving cylinder, the horizontal movement of the extension rod can be accurately controlled by the driving cylinder, the horizontal movement of the extension rod is driven by the driving cylinder, ensuring that the second camera can smoothly slide above the bearing plate, adapting to display screens of different sizes, the support seat is connected with the extension rod, making the position adjustment of the second camera more convenient and improving the detection efficiency and accuracy.

[0012] Optionally, a top block is arranged on the support seat, a lifting cylinder is arranged on the top block, an output end of the lifting cylinder is provided with a lifting ring, the lifting ring is sleeved outside the second camera, and the second camera is adjusted to be close to the edge of the display screen.

[0013] By adopting the technical scheme, the position of the second camera can be accurately adjusted by the top block and the lifting cylinder on the support seat, so that the second camera can more accurately perform high-quality detection close to the edge of the display screen.

[0014] Optionally, a warning mechanism is arranged at the lower end edge of the lifting ring, the warning mechanism comprises a telescopic rod and a warning sensor, the top end of the telescopic rod is arranged at the lower end of the lifting ring, and the warning sensor is arranged at the bottom end of the telescopic rod, so as to warn the distance between the lens of the second camera and the display screen.

[0015] By adopting the technical scheme, the warning mechanism can monitor the distance between the second camera and the display screen in real time, preventing the lens from being damaged or affecting the detection accuracy due to too close distance.

[0016] Optionally, a side edge detection mechanism is further arranged, which is used for detecting the four side edges of the lifted display screen, the side edge detection mechanism comprises an adjusting block, two groups of adjustable arc-shaped plates and a third camera, the adjusting block is arranged above the operation table, the arc-shaped plates are horizontally arranged on both sides of the adjusting block, the inner side of the arc-shaped plate is arranged corresponding to the side edge of the display screen, and the third camera is arranged on the inner side of the arc-shaped plate and is used for detecting the side edge of the display screen.

[0017] By adopting the technical scheme, in order to further detect the side edge of the display screen at the edge, the detection comprehensiveness is improved, the third camera on the inner side of the arc-shaped plate is used for detecting the side edge of the display screen, and the omission of the side edge detection of the display screen in the batch detection process is avoided.

[0018] Optionally, the two sides of the adjusting block are provided with translation air cylinders, the output ends of the translation air cylinders are provided with translation plates, the translation plates are connected with the upper surface of the arc-shaped plate, the operating table is provided with an adjusting air cylinder, the output end of the adjusting air cylinder is provided with a positioning plate, one end of the positioning plate is provided with a rotary motor, and the output end of the rotary motor is connected with the top of the adjusting block.

[0019] By adopting the above technical scheme, the horizontal position of the arc-shaped plate is adjusted to adapt to display screens of different sizes, the height of the third camera at the arc-shaped plate is adjusted by using the adjusting air cylinder, the horizontal rotation of the adjusting block is realized by the output end of the rotary motor, and the detection range of the third camera is expanded.

[0020] Optionally, the bearing plate is provided with a bearing concave surface for bearing the display screen, a plurality of bearing shafts are arranged in the bearing concave surface, flexible blocks are arranged on the bearing shafts, and the flexible blocks support the bottom of the display screen.

[0021] By adopting the above technical scheme, the bearing concave surface can better fit the shape of the display screen, and the stability during detection is improved; the flexible blocks on the plurality of bearing shafts can uniformly disperse the pressure of the display screen, avoid damage of the screen due to excessive local stress, and ensure that the screen remains flat during detection, thereby improving detection accuracy.

[0022] Optionally, the push-lifting mechanism comprises a plurality of push-lifting seats and push-lifting air cylinders, the push-lifting seats are arranged at the bottom of the bearing concave surface, the bottom ends of the push-lifting air cylinders are arranged on the push-lifting seats, and the output ends of the push-lifting air cylinders are connected with the bottom ends of the bearing shafts.

[0023] By adopting the above technical scheme, the push-lifting mechanism can effectively lift the display screen on the bearing plate, and the display screen is more convenient to detect.

[0024] A method for detecting the quality of a liquid crystal display screen, comprising the following steps: Placing the display screen to be detected on the bearing plate, starting the conveying belt on the operating table, and conveying the bearing plate along a predetermined path to below the gantry frame; When the bearing plate passes through the gantry frame, the swing arm starts to act, drives the combined frame to move along a preset track, and the first camera collects the overall image of the display screen, and the image data is transmitted to the processing unit for analysis; The second camera on the support frame also starts to work, adjusts the position as needed, realizes fine detection of the edge of the display screen, adjusts the height of the second camera close to the display screen, and the image data collected by the second camera is also transmitted to the processing unit for analysis, and the quality condition of the edge of the display screen is further confirmed.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the first camera and the second camera, the effective collection and detection of the overall image and edge details of the display screen are realized, significantly improving the comprehensiveness and accuracy of detection; 2. The design of the support frame allows the second camera to move flexibly in the horizontal direction, thereby adapting to display screens of different sizes and shapes, enhancing the flexibility and scope of application of the detection system; 3. The dust removal mechanism removes dust from the surface of the display screen before detection, avoiding the influence of impurities on the accuracy of the detection results, and further improving the reliability and stability of the detection. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a three-dimensional view of a liquid crystal display screen quality detection device in the present application.

[0027] Figure 2 is a side view of a liquid crystal display screen quality detection device in the present application.

[0028] Figure 3 is a three-dimensional view of a bearing plate of a liquid crystal display screen quality detection device in the present application.

[0029] Figure 4 is Figure 1 is a structural enlarged view of position A in

[0030] Figure 5 is a three-dimensional view of embodiment two of a liquid crystal display screen quality detection device in the present application.

[0031] Figure 6 is a side sectional view of a combination frame of a liquid crystal display screen quality detection device in the present application.

[0032] Figure 7 is a three-dimensional view of a side edge detection mechanism of a liquid crystal display screen quality detection device in the present application.

[0033] Figure 8 is a side view of a liquid crystal display screen quality detection device (with a side edge detection mechanism) in the present application.

[0034] In the figure: 1. operating table; 11. conveyor belt; 12. drive frame; 121. drive motor; 13. dust collecting mechanism; 131. fixed frame; 132. negative pressure vacuum cleaner; 133. telescopic pipe; 134. suction plate; 2. bearing plate; 21. bearing concave surface; 22. bearing shaft; 23. flexible block; 3. gantry; 31. swing arm; 4. detection mechanism; 41. combination frame; 411. placement slot; 412. electromagnet; 42. support frame; 421. support frame; 422. extension rod; 423. support seat; 424. Driving cylinder; 43. First camera; 431. Limiting plate; 432. Magnetic sheet; 44. Second camera; 5. Top block; 51. Lifting cylinder; 52. Lifting ring; 6. Early warning mechanism; 61. Telescopic rod; 62. Early warning sensor; 7. Side detection mechanism; 71. Adjusting block; 72. Arc plate; 73. Third camera; 74. Translation cylinder; 75. Translation plate; 76. Adjusting cylinder; 77. Positioning plate; 78. Rotating motor; 8. Lifting mechanism; 81. Lifting seat; 82. Lifting cylinder; 9. Display screen. DETAILED DESCRIPTION

[0035] The following is combined with the accompanying drawings Figures 1-8 This application is described in further detail.

[0036] Example 1, reference Figure 1 and Figure 2 The embodiment of the present application discloses a liquid crystal display screen quality inspection device, including: an operating table 1, a carrying plate 2, a gantry 3 and a detection mechanism 4.

[0037] A conveyor belt 11 is rotatably provided on the operating table 1. The conveyor belt 11 is an existing transmission device. A plurality of drive racks 12 are provided on the conveyor belt 11. A supporting plate 2 is rotatably provided on the top of the drive rack 12. The supporting plate 2 carries the display screen 9. A drive motor 121 is provided on the drive rack 12. The output shaft of the drive motor 121 is connected to the supporting plate 2 for changing the horizontal position of the supporting plate 2 so as to improve the efficiency of edge detection of the display screen 9. At least two gantries 3 are provided. The gantries 3 are provided on the operating table 1 corresponding to the top of the conveyor belt 11. A swing arm is rotatably provided on the gantry 3. 31; The detection mechanism 4 is used to detect the display screen 9. The detection mechanism 4 includes a combination frame 41, a support frame 42, a plurality of first cameras 43 and a second camera 44 for capturing images of the display screen 9. The combination frame 41 is arranged at the end of the swing arm 31, the first camera 43 is arranged at the bottom of the combination frame 41, and is used to capture the overall image of the display screen 9. The support frame 42 is arranged on the inner side of the gantry 3, and the second camera 44 is arranged at one end of the support frame 42, close to the upper surface of the supporting plate 2, and is used to detect the quality of the edge of the display screen 9 when the supporting plate 2 passes through the gantry 3.

[0038] The overall image and the quality at the edge of the display screen 9 are comprehensively detected, the transmission belt 11 on the operation table 1 drives the driving frame 12 to move, so that the carrying plate 2 passes under the multiple gantry frames 3 in turn, and when passing under the multiple gantry frames 3, the driving frame 12 can change the levelness of the carrying plate 2 horizontally, so as to ensure that each display screen 9 to be detected can be fully detected, the combination frame 41 is installed at the end of the swing arm 31, the first camera 43 is located at the bottom of the combination frame 41, which can flexibly adjust the angle and effectively collect the overall image of the display screen 9, the supporting frame 42 is arranged on the inner side of the gantry frame 3, and the second camera 44 is fixed at one end of the supporting frame 42, which can accurately shoot the edge part of the display screen 9 when the carrying plate 2 passes through the gantry frame 3, so as to realize accurate detection of local details, the overall structure is compact and reasonable, the detection efficiency and accuracy are improved, the need for manual intervention is reduced, and the automation level is improved.

[0039] With reference to Figure 2 and Figure 6 In the embodiment, more specifically, the bottom of the combination frame 41 is provided with a mounting groove 411 on the front and rear surfaces, the first camera 43 is arranged in the mounting groove 411, the first camera 43 is externally sleeved with a limiting plate 431, the outer side of the limiting plate 431 is provided with a magnetic piece 432, the inner wall of the mounting groove 411 is provided with an electromagnet 412, the electromagnet 412 is magnetically attracted to the magnetic piece 432 under power-on, the first camera 43 can be stably installed in the mounting groove 411 and quickly replaced and positioned through cooperation of the limiting plate 431 and the magnetic piece 432, so as to improve the flexibility and maintenance convenience of the detection device; meanwhile, power-on control of the electromagnet 412 makes the position adjustment of the first camera 43 more convenient, and the reliability and accuracy of the detection process are enhanced.

[0040] With reference to Figure 1 and Figure 4In the embodiment, more specifically, the support frame 42 comprises a support frame 421, an extension rod 422 and a support seat 423. The support frame 421 is arranged at the inner side of the gantry 3. A driving cylinder 424 is arranged in the support frame 421. The extension rod 422 is horizontally arranged at one side of the support frame 421, and the tail of the extension rod 422 is arranged on the output end of the driving cylinder 424. One end of the support seat 423 is connected with the head of the extension rod 422. The second camera 44 is slidingly arranged at one side of the support seat 423 corresponding to the upper side of the bearing plate 2. The design of the support frame 42 enables the second camera 44 to move flexibly, ensuring that the quality detection of the edge of the display screen 9 is more accurate and comprehensive. The support frame 421 is arranged at the inner side of the gantry 3 and is internally provided with the driving cylinder 424, so that the horizontal movement of the extension rod 422 can be accurately controlled. The horizontal movement of the extension rod 422 is driven by the driving cylinder 424, so that the second camera 44 can stably slide above the bearing plate 2 and adapt to display screens 9 of different sizes. The support seat 423 is connected with the extension rod 422, so that the position adjustment of the second camera 44 is more convenient, and the detection efficiency and accuracy are improved.

[0041] Reference Figure 4 In the embodiment, more specifically, the support seat 423 is provided with a top block 5. The top block 5 is provided with a lifting cylinder 51. The output end of the lifting cylinder 51 is provided with a lifting ring 52. The lifting ring 52 is sleeved outside the second camera 44, for adjusting the second camera 44 to approach the edge of the display screen 9. The top block 5 and the lifting cylinder 51 on the support seat 423 can accurately adjust the position of the second camera 44, so that the second camera 44 can more accurately approach the edge of the display screen 9 for high-quality detection. The design of the lifting ring 52 not only improves the flexibility of the second camera 44, but also ensures a safe distance between the second camera 44 and the display screen 9, avoiding damage to the equipment or distortion of data caused by collision.

[0042] Reference Figure 3 In the embodiment, more specifically, the bearing plate 2 is provided with a bearing concave surface 21 for bearing the display screen 9. A plurality of bearing shafts 22 are arranged in the bearing concave surface 21. Flexible blocks 23 are arranged on the bearing shafts 22. The flexible blocks 23 support the bottom of the display screen 9. The bearing concave surface 21 can better fit the shape of the display screen 9, improving the stability during detection. The flexible blocks 23 on the plurality of bearing shafts 22 can uniformly disperse the pressure of the display screen 9, avoiding damage to the screen caused by excessive local stress, while ensuring that the screen remains flat during detection, improving detection accuracy.

[0043] In this embodiment, more specifically, it also includes a lifting mechanism 8, which includes a plurality of lifting seats 81 and lifting cylinders 82. The lifting seats 81 are arranged at the bottom of the bearing concave surface 21, the bottom end of the lifting cylinders 82 is arranged on the lifting seats 81, and the output end of the lifting cylinders 82 is connected with the bottom end of one of the bearing shafts 22. The lifting mechanism 8 can effectively lift the display screen 9 on the bearing plate 2, making it more convenient to detect. Specifically, the arrangement of the lifting cylinders 82 enables the bearing shaft 22 to be precisely controlled in terms of lifting height, thereby ensuring that the display screen 9 is in the best position during the detection process, improving the detection accuracy and efficiency. At the same time, the stable design of the lifting seats 81 ensures the safety and reliability of the entire lifting process.

[0044] The implementation principle of the liquid crystal display screen quality detection device according to an embodiment of the present application is as follows: the display screen 9 to be detected is placed on the bearing plate 2 and conveyed to the lower side of the gantry 3 along a predetermined path by the conveying belt 11. The dust suction mechanism 13 is started to remove dust on the surface of the display screen 9. The display screen 9 is detected at the gantry 3 by the detection mechanism 4, the overall image of the display screen 9 is effectively collected, and accurate detection of local details is realized. The overall structure is compact and reasonable, the detection efficiency and accuracy are improved, the need for manual intervention is reduced, and the automation level is improved.

[0045] Embodiment two, refer to Figure 5 The difference between this embodiment and embodiment one is that the lower end edge of the lifting ring 52 is provided with a warning mechanism 6, which includes a telescopic rod 61 and a warning sensor 62. The top end of the telescopic rod 61 is arranged at the lower end of the lifting ring 52, and the warning sensor 62 is arranged at the bottom end of the telescopic rod 61, which is used to warn the distance between the lens of the second camera 44 and the display screen 9. The warning mechanism 6 can monitor the distance between the second camera 44 and the display screen 9 in real time, preventing the lens from being damaged or affecting the detection accuracy due to too close distance. Specifically, the design of the telescopic rod 61 enables the warning sensor 62 to effectively warn at different height positions, ensuring that the camera is always within a safe working range. At the same time, the telescopic telescopic rod 61 can also adapt to different detection environments, improving the flexibility and reliability of the equipment.

[0046] Embodiment three, refer to Figure 1The difference between this embodiment and the first embodiment is that a dust collection mechanism 13 is provided on the side of the operating table 1 close to the gantry 3 for removing dust from the surface of the display screen 9 before detection. The dust collection mechanism 13 includes a fixed frame 131, a negative pressure dust collector 132, a telescopic pipe 133 and a suction plate 134. The fixed frame 131 is provided on the top side of the operating table 1, the negative pressure dust collector 132 is provided on the fixed frame 131, the telescopic pipe 133 is connected to the suction end of the negative pressure dust collector 132, and the suction plate 134 is provided on the telescopic pipe 131 above the conveyor belt 11. The nozzle of 33 can effectively remove dust from the surface of the display screen 9 and improve the detection accuracy. The fixing frame 131 is set on the top side of the operating table 1 to ensure that the dust collection mechanism 13 is firmly installed. The negative pressure vacuum cleaner 132 is set on the fixing frame 131 to generate a strong attraction to quickly remove dust. The telescopic pipe 133 is connected to the adsorption end of the negative pressure vacuum cleaner 132, so that the adsorption plate 134 can be flexibly moved to the required position. The adsorption plate 134 is set at the nozzle of the telescopic pipe 133 above the corresponding conveyor belt 11, accurately covering the area to be inspected to avoid omissions.

[0047] Example 4, reference Figure 7 and Figure 8 , the difference between this embodiment and the first embodiment is that: it also includes a side detection mechanism 7 for detecting the four sides of the raised display screen 9, the side detection mechanism 7 includes an adjustment block 71, two sets of adjustable curved plates 72 and a third camera 73, the adjustment block 71 is arranged above the operating table 1, the curved plates 72 are horizontally arranged on both sides of the adjustment block 71, the inner side of the curved plates 72 corresponds to the side of the display screen 9, the third camera 73 is arranged on the inner side of the curved plates 72, and is used to detect the side of the display screen 9. In order to further detect the side of the display screen 9 at the edge and improve the comprehensiveness of the detection, the side of the display screen 9 is detected by the third camera 73 on the inner side of the curved plate 72 to avoid omissions in the side detection of the display screen 9 during batch detection.

[0048] refer to Figure 7 In this embodiment, more specifically, translation cylinders 74 are provided on both sides of the adjustment block 71, and a translation plate 75 is provided at the output end of the translation cylinder 74. The translation plate 75 is connected to the upper surface of the arc plate 72, and an adjustment cylinder 76 is provided on the operating table 1. A positioning plate 77 is provided at the output end of the adjustment cylinder 76. A rotating motor 78 is provided at one end of the positioning plate 77. The output end of the rotating motor 78 is connected to the top of the adjustment block 71 to achieve horizontal position adjustment of the arc plate 72 to adapt to display screens 9 of different sizes, and by using the adjustment cylinder 76, it is convenient to adjust the height of the third camera 73 at the arc plate 72, and the horizontal rotation of the adjustment block 71 is achieved through the output end of the rotating motor 78, thereby expanding the detection range of the third camera 73.

[0049] Embodiment five, a method for detecting the quality of a liquid crystal display screen, comprising the following steps: Place the display screen 9 to be detected on the carrier plate 2, start the conveying belt 11 on the operation platform 1, and convey the carrier plate 2 along the predetermined path to below the gantry 3; at this time, the dust collection mechanism 13 on the side of the operation platform 1 close to the gantry 3 is started to remove the dust on the surface of the display screen 9; When the carrier plate 2 passes through the gantry 3, the swing arm 31 starts to act, driving the combined frame 41 to move along the preset track; the first camera 43 collects the overall image of the display screen 9, and the image data is transmitted to the processing unit for analysis; The second camera 44 on the support frame 42 also starts to work, adjusts the position as needed, and realizes fine detection of the edge of the display screen 9; adjust the height of the second camera 44 close to the display screen 9; the image data collected by the second camera 44 is also transmitted to the processing unit for analysis, and the quality condition of the edge of the display screen 9 is further confirmed.

[0050] In this embodiment, more specifically, the processing unit uses image processing algorithms to preprocess the image, such as denoising, enhancement, and segmentation, and then uses a machine learning model to identify the defect type and location, and generates a detailed detection report.

[0051] The above are preferred embodiments of the present application, and are not limited to the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A liquid crystal display screen quality detection device, characterized in that: include: An operating table (1), wherein a conveyor belt (11) is rotatably provided on the operating table (1), and a plurality of drive racks (12) are provided on the conveyor belt (11); A carrying plate (2) is rotatably arranged on the top of the driving frame (12), and the carrying plate (2) carries the display screen (9); At least two gantries (3) are provided, the gantries (3) being provided on the operating platform (1) above the corresponding conveyor belt (11), and the gantries (3) being provided with swing arms (31) for rotation; and A detection mechanism (4) is used to detect the display screen (9), and the detection mechanism (4) includes a combination frame (41), a support frame (42), a plurality of first cameras (43) and second cameras (44) for collecting images of the display screen (9), the combination frame (41) is arranged at the end of the swing arm (31), the first camera (43) is arranged at the bottom of the combination frame (41), and is used to collect the entire image of the display screen (9), the support frame (42) is arranged on the inner side of the gantry (3), and the second camera (44) is arranged at one end of the support frame (42), close to the upper surface of the bearing plate (2), and is used to detect the quality of the edge of the display screen (9) when the bearing plate (2) passes through the gantry (3).

2. The liquid crystal display screen quality detection device according to claim 1, characterized in that: The front and rear sides of the bottom of the assembly frame (41) are both provided with a placement groove (411), the first camera (43) is arranged in the placement groove (411), a limiting plate (431) is provided on the outside of the first camera (43), a magnetic attraction sheet (432) is provided on the outside of the limiting plate (431), and an electromagnet (412) is provided on the inner wall of the placement groove (411), and the electromagnet (412) is magnetically attracted to the magnetic attraction sheet (432) when power is supplied.

3. The liquid crystal display screen quality inspection device according to claim 1, characterized in that: The support frame (42) comprises a support frame (421), an extension rod (422) and a support seat (423); the support frame (421) is arranged on the inner side of the gantry (3); a driving cylinder (424) is arranged in the support frame (421); the extension rod (422) is horizontally arranged on one side of the support frame (421), and the rod tail of the extension rod (422) is arranged on the output end of the driving cylinder (424); one end of the support seat (423) is connected to the rod head of the extension rod (422); and the second camera (44) is slidably arranged on one side of the support seat (423) corresponding to the upper side of the bearing plate (2).

4. The liquid crystal display screen quality inspection device according to claim 3, characterized in that: A top block (5) is provided on the support seat (423), a lifting cylinder (51) is provided on the top block (5), a lifting ring (52) is provided at the output end of the lifting cylinder (51), and the lifting ring (52) is sleeved on the outside of the second camera (44) and is used to adjust the second camera (44) close to the edge of the display screen (9).

5. The liquid crystal display screen quality inspection device according to claim 4, characterized in that: An early warning mechanism (6) is provided at the lower edge of the lifting ring (52), and the early warning mechanism (6) includes a retractable telescopic rod (61) and an early warning sensor (62). The top end of the telescopic rod (61) is provided at the lower end of the lifting ring (52), and the early warning sensor (62) is provided at the bottom end of the telescopic rod (61) for early warning of the distance between the lens of the second camera (44) and the display screen (9).

6. The liquid crystal display screen quality inspection device according to claim 1, characterized in that: The device further includes a side detection mechanism (7) for detecting the four sides of the raised display screen (9), wherein the side detection mechanism (7) includes an adjustment block (71), two sets of adjustable curved plates (72) and a third camera (73), wherein the adjustment block (71) is arranged above the operating table (1), the curved plates (72) are horizontally arranged on both sides of the adjustment block (71), the inner side of the curved plates (72) corresponds to the side of the display screen (9), and the third camera (73) is arranged on the inner side of the curved plates (72) for detecting the side of the display screen (9).

7. The liquid crystal display screen quality inspection device according to claim 6, characterized in that: Both sides of the adjustment block (71) are provided with translation cylinders (74), the output end of the translation cylinder (74) is provided with a translation plate (75), and the translation plate (75) is connected to the upper surface of the arc plate (72). The operating table (1) is provided with an adjustment cylinder (76), the output end of the adjustment cylinder (76) is provided with a positioning plate (77), and one end of the positioning plate (77) is provided with a rotary motor (78), and the output end of the rotary motor (78) is connected to the top of the adjustment block (71).

8. The liquid crystal display screen quality inspection device according to claim 1, characterized in that: The bearing plate (2) is provided with a bearing concave surface (21) for bearing the display screen (9), a plurality of bearing shafts (22) are provided in the bearing concave surface (21), and flexible blocks (23) are provided on the bearing shafts (22), and the flexible blocks (23) support the bottom of the display screen (9).

9. The liquid crystal display screen quality inspection device according to claim 8, characterized in that: It also includes a pushing mechanism (8), which includes a plurality of pushing seats (81) and a pushing cylinder (82), wherein the pushing seat (81) is arranged at the bottom of the bearing concave surface (21), the bottom end of the pushing cylinder (82) is arranged on the pushing seat (81), and the output end of the pushing cylinder (82) is connected to the bottom end of one of the bearing shafts (22).

10. A method for detecting the quality of a liquid crystal display screen, characterized in that: The following steps are involved: Placing the display screen (9) to be inspected on the carrier plate (2), starting the conveyor belt (11) on the operating table (1), and conveying the carrier plate (2) along a predetermined path to the bottom of the gantry (3); When the carrier plate (2) passes through the gantry (3), the swing arm (31) starts to move, driving the assembly frame (41) to move along a preset trajectory; the first camera (43) collects the entire image of the display screen (9), and the image data is transmitted to the processing unit for analysis; The second camera (44) on the support frame (42) also starts to work, and adjusts its position as needed to achieve fine detection of the edge of the display screen (9); adjusts the height of the second camera (44) close to the display screen (9); The image data collected by the second camera (44) is also transmitted to the processing unit for analysis to further confirm the quality of the edge of the display screen (9).

Images