An AOI automatic inspection equipment for LCD screen circuits

Abstract

The present invention discloses an automatic AOI detection device for LCD screen circuits, which includes a frame, a control device, a loading device, a detection device, a material taking device and a material unloading device; the loading device includes a front conveying mechanism, a position correction mechanism and a front transfer mechanism, the front conveying mechanism is used to convey the LCD screen to be tested, and the position correction mechanism is used to correct the position of the LCD screen to be tested; the detection device includes a transfer mechanism and a detection mechanism, the transfer mechanism can move along the longitudinal direction of the frame, and the detection mechanism is arranged above the transfer mechanism; the material taking device includes a feeding transfer mechanism and a discharging transfer mechanism, the feeding transfer mechanism transfers the LCD screen to be tested to the transfer mechanism, and the discharging transfer mechanism transfers the LCD screen detected by the detection mechanism to the unloading device; the unloading device is used to convey good LCD screens and bad LCD screens. The present invention not only realizes the automatic loading and unloading of LCD screens, but also can correct the position of the LCD screen when loading, greatly improving the efficiency of LCD screen detection.

Description

Technical Field

[0001] The present invention relates to the field of visual inspection equipment, and in particular to an AOI automatic inspection equipment for liquid crystal screen circuits. Background Art

[0002] LCD screens have the advantages of small size, low power consumption, and low radiation, and have been increasingly widely used in electronic devices. LCD screens are prone to various defects during the production process, such as the screen failing to light up and scratches on the screen appearance. Therefore, it is very necessary to test the LCD screens to prevent defective LCD screens from flowing out.

[0003] In the existing LCD production line, the inspection of LCD screens is completed by manually assisted visual inspection equipment. That is, when the visual inspection equipment is conducting inspection, it is necessary to manually load the LCD screen to be tested onto the inspection table, and unload the inspected LCD screen after the inspection is completed. This LCD screen inspection operation method is very inefficient. For inspecting batches of LCD screens, it requires a large manpower cost, resulting in an increase in product costs.

[0004] At the same time, in order to ensure the accuracy of the inspection, the LCD screen to be tested needs to be accurately placed according to the inspection area of ​​the inspection table when loading materials, so as to ensure that the visual inspection equipment can perform comprehensive and accurate inspections on the LCD screen to be tested, and reduce accidental errors in the inspection process. In existing visual inspection equipment, after manual loading to the inspection table, the LCD screen needs to be placed in the appropriate position on the inspection table to ensure the accuracy of subsequent LCD screen inspection, but this further reduces the efficiency of LCD screen inspection. Summary of the invention

[0005] The purpose of the present invention is to provide an AOI automatic detection device for LCD circuits, which can not only realize automatic loading and unloading of LCDs, but also correct the position of LCDs during loading, thereby greatly improving the efficiency of LCD detection.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An AOI automatic detection device for liquid crystal screen circuits, comprising a frame, a control device, a loading device, a detection device, a material taking device and a material unloading device arranged on the frame, wherein:

[0008] The loading device includes a front conveying mechanism, a position correction mechanism and a front transfer mechanism. The front conveying mechanism is arranged on the frame and is used to convey the LCD screen to be tested. The position correction mechanism is arranged above the front conveying mechanism and is used to correct the position of the LCD screen to be tested and transfer the LCD screen to be tested to the front transfer mechanism.

[0009] The detection device is arranged behind the loading device, and comprises a transfer mechanism and a detection mechanism. The transfer mechanism can move along the longitudinal direction of the frame, and the detection mechanism is arranged above the transfer mechanism, and the LCD screen to be tested is detected by the detection mechanism;

[0010] The material taking device is arranged between the loading device and the unloading device, and comprises a feeding transfer mechanism and a discharging transfer mechanism. The feeding transfer mechanism transfers the LCD screen to be tested on the front transfer mechanism to the transfer mechanism, and the discharging transfer mechanism transfers the LCD screen tested by the detection mechanism on the transfer mechanism to the unloading device.

[0011] The unloading device is arranged behind the detection device and is used to convey good LCD screens and bad LCD screens;

[0012] The feeding device, the detecting device, the taking device and the unloading device are respectively operated through the control device.

[0013] Preferably, the position correction mechanism comprises a first imaging component, a first grabbing component, and a moving component, wherein:

[0014] The first imaging component is arranged directly above the front conveying mechanism and is used to capture the image of the LCD screen to be tested passing by;

[0015] The first grabbing assembly includes a first mounting seat, a rotating member and a first suction cup, wherein the first mounting seat is located above the front conveying mechanism, the rotating member is disposed on the first mounting seat, the first suction cup is disposed on the rotating member, the first suction cup is used to grab the LCD screen to be tested, and the first suction cup can be driven to rotate by the rotating member;

[0016] The moving assembly includes a transverse moving member, a longitudinal moving member and a vertical moving member. The transverse moving member is arranged on the side of the front conveying mechanism, the longitudinal moving member is arranged on the transverse moving member, and it moves in the transverse direction of the front conveying mechanism through the transverse moving member. The vertical moving member is arranged on the longitudinal moving member, and it moves in the longitudinal direction of the front conveying mechanism through the longitudinal moving member. The first mounting seat is arranged on the vertical moving member, and it moves in the vertical direction of the front conveying mechanism through the vertical moving member.

[0017] Preferably, the transverse member comprises a first base, a transverse screw rod, a transverse motor and a transverse slide, wherein the first base is arranged on the frame, the transverse screw rod is rotatably arranged on the first base and driven by the transverse motor, and the transverse slide cooperates with the transverse screw rod;

[0018] The longitudinal moving member comprises a second base, a longitudinal moving screw, a longitudinal moving motor and a longitudinal moving slide, wherein the second base is fixedly mounted on the transverse moving slide, the longitudinal moving screw is rotatably mounted on the second base and driven by the longitudinal moving motor, and the longitudinal moving slide cooperates with the longitudinal moving screw;

[0019] The vertical moving member comprises a third base, a vertical guide rail and a vertical moving cylinder, the third base is fixed on the longitudinal moving slide, the vertical guide rail and the vertical moving cylinder are both arranged on the third base, the first mounting seat is arranged on the vertical guide rail, and is driven by the vertical moving cylinder to move along the vertical guide rail;

[0020] The rotating member comprises a servo motor and a connecting seat. The servo motor is arranged on the first mounting seat. The connecting seat is arranged below the first mounting seat and connected to the shaft of the servo motor. The first suction cup is fixed on the connecting seat.

[0021] Preferably, the front transfer mechanism includes a front turntable and a front flipping assembly; the front turntable and the front flipping assembly are sequentially arranged behind the front conveying mechanism, and the first grabbing assembly is used to transfer the LCD screen to be tested after the position is corrected to the front turntable through the moving assembly; the front flipping assembly includes a flipping seat, a flipping motor, a flipping axis, a second suction cup and an angle sensor, the flipping seat is arranged on the frame, the flipping motor is arranged on the flipping seat, the flipping axis is rotatably arranged on the flipping seat and is connected to the shaft of the flipping motor, the second suction cup and the angle sensor are both connected to the flipping axis and rotate with the flipping axis, and the second suction cup is used to grab the LCD screen to be tested on the front turntable.

[0022] Preferably, the transferring mechanism includes a fourth base, a transferring screw, a transferring motor, a transferring slide and a transferring platform, the fourth base is longitudinally arranged on the frame, the transferring screw is rotatably arranged on the fourth base and driven by the transferring motor, the transferring slide cooperates with the transferring screw, and the transferring platform is fixed on the transferring slide; a first support is provided above the fourth base; the detection mechanism includes a fifth base, a detection screw, a detection motor, a detection slide, a second mounting seat and a second imaging component, the fifth base is transversely arranged on the first support, the detection screw is rotatably arranged on the fifth base and driven by the detection motor, the detection slide cooperates with the detection screw, the second mounting seat is fixed on the detection slide, the second imaging component is arranged on the second mounting seat, and can be moved to directly above the transferring platform.

[0023] Preferably, the second imaging component includes a camera, a third mounting seat, a light source, a code reader and a distance digital display. The camera is mounted on the second mounting seat. The third mounting seat is a frame-shaped structure, which is fixed on the second mounting seat and located on the front side of the camera. The light source and the code reader are mounted on the third mounting seat, and the distance digital display is mounted on the second mounting seat.

[0024] Preferably, the number of the detection devices includes at least four, and the detection devices are arranged in parallel in sequence. The material taking device is arranged between the loading device and the unloading device, and is arranged laterally along the detection devices.

[0025] Preferably, the feeding transfer mechanism and the unloading transfer mechanism both include a sixth base, a pulley assembly, a transfer motor, a transfer slide and a second grabbing assembly. The frame is provided with a second support, the sixth base is laterally arranged on the second support, the pulley assembly is arranged in the sixth base and is driven by the transfer motor, the transfer slide is arranged on the sixth base and is moved by the pulley assembly, the second grabbing assembly is fixed on the transfer slide, the second grabbing assembly of the feeding transfer mechanism transfers the LCD screen to be tested on the front transfer mechanism to the transferring mechanism, and the second grabbing assembly of the unloading transfer mechanism transfers the LCD screen detected by the detection mechanism on the transferring mechanism to the unloading device.

[0026] Preferably, the second grabbing assembly includes a screw module, a fourth mounting seat and a third suction cup, the screw module is fixed on the transfer slide, the fourth mounting seat is connected to the screw module, and the third suction cup is arranged at the bottom of the fourth mounting seat, and is used to grab the LCD screen to be tested on the front transfer mechanism / the LCD screen on the transfer mechanism; a mounting frame is provided under the sixth base, and an ion blower is provided on the mounting frame, and the ion blower is located above each detection mechanism.

[0027] Preferably, the unloading device includes a rear conveying mechanism and a unloading mechanism, the rear conveying mechanism includes a defective product conveying mechanism and a good product conveying mechanism, the unloading mechanism is arranged between the defective product conveying mechanism and the good product conveying mechanism, the unloading mechanism includes a seventh base, a unloading screw rod, a unloading motor, an unloading slide and a rear flipping assembly, the seventh base is longitudinally arranged on the frame, the unloading screw rod is rotatably arranged on the seventh base and is driven by the unloading motor, the unloading slide cooperates with the unloading screw rod, the rear flipping assembly is fixed on the unloading slide, and the structure of the rear flipping assembly is consistent with the structure of the front flipping assembly, the defective LCD screen transferred by the unloading transfer mechanism is placed on the defective product conveying mechanism, and the good LCD screen transferred by the unloading transfer mechanism is placed on the rear flipping assembly, and is transferred to the good product conveying mechanism by the rear flipping assembly.

[0028] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0029] 1. The present invention uses a loading device to correct the position of the LCD screen to be tested and then transfer it to the front transfer mechanism, and then uses a feeding transfer mechanism to transfer the LCD screen to be tested on the front transfer mechanism to the transfer mechanism, and the transfer mechanism moves the LCD screen to be tested to the bottom of the detection mechanism for detection. After the detection is completed, the LCD screen on the transfer mechanism is transferred to the unloading device by the unloading transfer mechanism for unloading of good and bad LCD screens. Not only does it realize automatic loading and unloading of LCD screens, but it can also correct the position of the LCD screen when loading, greatly improving the efficiency of LCD screen detection.

[0030] 2. The number of detection devices in the present invention includes at least four arranged in parallel in sequence. Through continuous loading by a feeding transfer mechanism and continuous unloading by a discharging transfer mechanism, each detection device can perform detection work at the same time, further improving the efficiency of LCD screen detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A perspective view of the present invention;

[0032] Figure 2 It is a three-dimensional diagram of the present invention (without the device housing);

[0033] Figure 3 is a three-dimensional diagram of a feeding device;

[0034] Figure 4 is a structural schematic diagram of a position correction mechanism;

[0035] Figure 5 is one of the installation diagrams of the first grabbing assembly;

[0036] Figure 6 The second installation diagram of the first grabbing component;

[0037] Figure 7 This is a schematic diagram of the structure of the former transfer mechanism;

[0038] Figure 8 is a three-dimensional diagram of the detection device;

[0039] Fig. 9 It is a three-dimensional diagram of the detection device (without the frame);

[0040] Fig.10 is a schematic diagram of the installation of the second imaging component;

[0041] Fig.11 It is a three-dimensional diagram of the material taking device;

[0042] Fig.12 It is a three-dimensional diagram of the material taking device (without the frame);

[0043] Fig.13 is a schematic diagram of the installation of the second grabbing component;

[0044] Fig.14 It is a three-dimensional diagram of the unloading device.

[0045] Description of reference numerals:

[0046] 1. Frame, 2. Loading device, 3. Detection device, 4. Retrieving device, 5. Unloading device, 6. LCD screen to be tested, 7. Tested LCD screen;

[0047] 100. Front conveying mechanism;

[0048] 200. Position correction mechanism, 210. First imaging component, 220. First grasping component, 221. First mounting seat, 222. Rotating member, 2221. Servo motor, 2222. Connecting seat, 223. First suction cup, 230. Moving component, 231. Transverse member, 2311. First base, 2312. Transverse motor, 2313. Transverse slide, 232. Longitudinal member, 2321. Second base, 2322. Longitudinal motor, 2323. Longitudinal slide, 233. Vertical member, 2331. Third base, 2332. Vertical guide rail, 2333. Vertical cylinder;

[0049] 300. front transfer mechanism, 310. front transfer table, 320. front flip assembly, 321. flip seat, 322. flip motor, 323. flip shaft, 324. second suction cup, 325. angle sensor;

[0050] 400. transfer mechanism, 410. fourth base, 420. transfer motor, 430. transfer slide, 440. transfer platform, 450. first support;

[0051] 500. Detection mechanism, 510. Fifth base, 520. Detection motor, 530. Detection slide, 540. Second mounting seat, 550. Second imaging assembly, 551. Camera, 552. Third mounting seat, 553. Light source, 554. Code reader, 555. Distance digital display;

[0052] 600. feeding transfer mechanism, 700. unloading transfer mechanism, 671. sixth base, 672. pulley assembly, 673. transfer motor, 674. transfer slide, 675. second grab assembly, 6751. lead screw module, 6752. fourth mounting seat, 6753. third suction cup, 676. second support, 677. mounting frame, 678. ion blower;

[0053] 800. Rear conveying mechanism, 810 defective product conveying mechanism, 820. Good product conveying mechanism;

[0054] 900. unloading mechanism, 910. seventh base, 920. unloading motor, 930. unloading slide, 940. rear flip assembly. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0056] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] Example

[0058] Cooperate Figures 1 to 7 As shown, the present invention discloses an AOI automatic detection device for liquid crystal screen circuits, comprising a frame 1, a control device (not shown in the figure), a loading device 2 arranged on the frame 1, a detection device 3, a material taking device 4 and a material unloading device 5.

[0059] The loading device 2 includes a front conveying mechanism 100, a position correction mechanism 200 and a front transfer mechanism 300. The front conveying mechanism 100 is arranged on the frame 1, and is used to convey the LCD screen 6 to be tested. The position correction mechanism 200 is arranged above the front conveying mechanism 100, and is used to correct the position of the LCD screen 6 to be tested and transfer the LCD screen 6 to be tested to the front transfer mechanism 300.

[0060] The position correction mechanism 200 includes a first imaging component 210, a first gripping component 220, and a moving component 230. The first imaging component 210 is arranged directly above the front conveying mechanism 100, and is used to capture the image of the passing LCD screen 6 to be tested. An infrared sensor can be arranged above the front conveying mechanism 100 to realize the stopping and running of the front conveying mechanism 100, thereby ensuring the clarity of the images taken by the first imaging component 210.

[0061] The first grabbing assembly 220 includes a first mounting seat 221, a rotating member 222 and a first suction cup 223. The first mounting seat 221 is located above the front conveying mechanism 100. The rotating member 222 is disposed on the first mounting seat 221. The first suction cup 223 is disposed on the rotating member 222. The first suction cup 223 is used to grab the LCD screen 6 to be tested, and can be driven to rotate by the rotating member 222. The rotating member 222 includes a servo motor 2221 and a connecting seat 2222. The servo motor 2221 is disposed on the first mounting seat 221. The connecting seat 2222 is disposed below the first mounting seat 221 and is connected to the shaft of the servo motor 2221. The first suction cup 223 is fixedly disposed on the connecting seat 2222.

[0062] The moving assembly 230 includes a transverse moving member 231, a longitudinal moving member 232 and a vertical moving member 233. The transverse moving member 231 is arranged on the side of the front conveying mechanism 100, and the longitudinal moving member 232 is arranged on the transverse moving member 231. It moves in the transverse direction of the front conveying mechanism 100 through the transverse moving member 231. The vertical moving member 233 is arranged on the longitudinal moving member 232. It moves in the longitudinal direction of the front conveying mechanism 100 through the longitudinal moving member 232. The first mounting seat 221 is arranged on the vertical moving member 233. It moves in the vertical direction of the front conveying mechanism 100 through the vertical moving member 233.

[0063] The transverse moving member 231 includes a first base 2311, a transverse moving screw (not shown in the figure), a transverse moving motor 2312 and a transverse moving slide 2313. The first base 2311 is arranged on the frame 1, the transverse moving screw is rotatably arranged on the first base 2311 and is driven by the transverse moving motor 2312, and the transverse moving slide 2313 cooperates with the transverse moving screw.

[0064] The longitudinal moving member 232 includes a second base 2321, a longitudinal moving screw (not shown in the figure), a longitudinal moving motor 2322 and a longitudinal moving slide 2323. The second base 2321 is fixed on the transverse moving slide 2313. The longitudinal moving screw is rotatably arranged on the second base 2321 and is driven by the longitudinal moving motor 2322. The longitudinal moving slide 2323 cooperates with the longitudinal moving screw.

[0065] The vertical moving member 233 includes a third base 2331, a vertical guide rail 2332 and a vertical moving cylinder 2333. The third base 2331 is fixed on the longitudinal moving slide 2323. The vertical guide rail 2332 and the vertical moving cylinder 2333 are both arranged on the third base 2331. The first mounting seat 221 is arranged on the vertical guide rail 2332 and is driven by the vertical moving cylinder 2333 to move along the vertical guide rail 2332.

[0066] The front transfer mechanism 300 includes a front transfer table 310 and a front flip assembly 320, which are arranged in sequence behind the front conveying mechanism 100. The first grabbing assembly 220 transfers the LCD screen 6 to be tested after the position correction to the front transfer table 310 through the moving assembly 230. The front flip assembly 320 includes a flip seat 321, a flip motor 322, a flip shaft 323, a second suction cup 324 and an angle sensor 325. The flip seat 321 is arranged on the frame 1, the flip motor 322 is arranged on the flip seat 321, the flip shaft 323 is rotatably arranged on the flip seat 321 and is connected to the shaft of the flip motor 322. The second suction cup 324 and the angle sensor 325 are both connected to the flip shaft 323 and rotate with the flip shaft 323. The angle sensor 325 is used to detect the flip angle of the flip shaft 323 so that the second suction cup 324 is flipped into place. The second suction cup 324 is used to grab the LCD screen 6 to be tested on the front transfer table 310.

[0067] After the first imaging component 210 captures the image of the LCD screen 6 to be tested on the front conveying mechanism 100, it is compared with the standard position data stored in the control device, so that the control device generates a position movement signal to the first grabbing component 220, so that the first grabbing component 220 can adjust the position of the LCD screen 6 to be tested. In this embodiment, the image comparison module in the control device can use an existing module, which can compare the acquired image with the pre-stored image. After the first grabbing component 220 grabs and adjusts the position of the LCD screen 6 to be tested, the control device controls the transverse moving member 231, the longitudinal moving member 232 and the vertical moving member 233 to work, so as to realize the horizontal, longitudinal and vertical movement of the first grabbing component 220, and transfer the LCD screen 6 to be tested to the front transfer table 310.

[0068] Cooperate Figure 2 , Figures 8 to 10 As shown, the detection device 3 is arranged behind the loading device 2, and includes a transfer mechanism 400 and a detection mechanism 500. The transfer mechanism 400 can move along the longitudinal direction of the frame 1, and the detection mechanism 500 is arranged above the transfer mechanism 400. The detection mechanism 500 is used to detect the LCD screen 6 to be tested.

[0069] The transfer mechanism 400 includes a fourth base 410, a transfer screw (not shown in the figure), a transfer motor 420, a transfer slide 430 and a transfer platform 440. The fourth base 410 is longitudinally arranged on the frame 1, the transfer screw is rotatably arranged on the fourth base 410 and is driven by the transfer motor 420, the transfer slide 430 cooperates with the transfer screw, the transfer platform 440 is fixed on the transfer slide 430, and a first support 450 is provided above the fourth base 410.

[0070] The detection mechanism 500 includes a fifth base 510, a detection screw (not shown in the figure), a detection motor 520, a detection slide 530, a second mounting seat 540 and a second imaging component 550. The fifth base 510 is horizontally arranged on the first support 450, the detection screw is rotatably arranged on the fifth base 510 and is driven by the detection motor 520, the detection slide 530 cooperates with the detection screw, the second mounting seat 540 is fixed on the detection slide 530, and the second imaging component 550 is arranged on the second mounting seat 540 and can be moved to be directly above the transfer platform 440.

[0071] The second imaging component 550 includes a camera 551, a third mounting seat 552, a light source 553, a barcode reader 554 and a distance digital display 555. The camera 551 is mounted on the second mounting seat 540. The camera 551 collects image information of the LCD screen on the transfer stage 440 and processes it through the control device to identify good products and defective products. The third mounting seat 552 is a frame-shaped structure, which is fixedly mounted on the second mounting seat 540 and is located on the front side of the camera 551. The light source 553 and the barcode reader 554 are mounted on the third mounting seat 552. The distance digital display 555 is mounted on the second mounting seat 540. The distance digital display 555 is used to detect the real-time distance between the object distance barrel and the LCD screen of the camera 551.

[0072] In this embodiment, there are at least four detection devices 3 , which are arranged in parallel in sequence. The material taking device 4 is arranged between the loading device 2 and the unloading device 5 , and is arranged transversely along the detection devices 3 .

[0073] Cooperate Figure 2 , Figures 11 to 13 As shown, the material picking device 4 is arranged between the loading device 2 and the unloading device 5, and includes a feeding transfer mechanism 600 and a unloading transfer mechanism 700. The feeding transfer mechanism 600 transfers the LCD screen 6 to be tested on the front transfer mechanism 300 to the transfer mechanism 400, and the unloading transfer mechanism 700 transfers the LCD screen on the transfer mechanism 400 that has been detected by the detection mechanism 500 to the unloading device 5.

[0074] The feeding transfer mechanism 600 and the unloading transfer mechanism 700 both include a sixth base 671, a pulley assembly 672, a transfer motor 673, a transfer slide 674 and a second grab assembly 675. The frame 1 is provided with a second support 676. The sixth base 671 is transversely arranged on the second support 676. The pulley assembly 672 is arranged in the sixth base 671 and driven by the transfer motor 673. The transfer slide 674 is arranged on the sixth base 671 and is driven by the pulley assembly 672 to move. The second grab assembly 675 is fixed on the transfer slide 674. The second grab assembly 675 of the feeding transfer mechanism 600 transfers the LCD screen 6 to be tested on the front transfer mechanism 300 to the transfer mechanism 400. The second grab assembly 675 of the unloading transfer mechanism 700 transfers the LCD screen on the transfer mechanism 400 that has been detected by the detection mechanism 500 to the unloading device 5.

[0075] The second grabbing assembly 675 includes a screw module 6751, a fourth mounting seat 6752 and a third suction cup 6753. The screw module 6751 is fixed on the transfer slide 674, the fourth mounting seat 6752 is connected to the screw module 6751, and the third suction cup 6753 is arranged at the bottom of the fourth mounting seat 6752, and is used to grab the LCD screen to be tested on the front transfer mechanism 300 / the LCD screen on the transfer mechanism 400. A mounting frame 677 is arranged below the sixth base 671, and an ion blower 678 is arranged on the mounting frame 677, and the ion blower 678 is located above each detection mechanism 500. The ion blower 678 is arranged to remove static electricity on the LCD screen to prevent the generated static electricity from damaging the LCD screen.

[0076] Cooperate Figure 2 , Figure 7 and Fig.14 As shown, the unloading device 5 is arranged behind the detection device 3, and is used to transport good LCD screens and defective LCD screens. The unloading device 5 includes a rear conveying mechanism 800 and a unloading mechanism 900. The rear conveying mechanism 800 includes a defective product conveying mechanism 810 and a good product conveying mechanism 820. The unloading mechanism 900 is arranged between the defective product conveying mechanism 810 and the good product conveying mechanism 820. The unloading mechanism 900 includes a seventh base 910, an unloading screw (not shown in the figure), an unloading motor 920, an unloading slide 930 and a rear flip assembly 940. The seventh base 910 is longitudinally arranged on the frame 1, the unloading screw is rotatably arranged on the seventh base 910 and is driven by the unloading motor 920, the unloading slide 930 cooperates with the unloading screw, the rear flip assembly 940 is fixed on the unloading slide 930, and the structure of the rear flip assembly 940 is consistent with the structure of the front flip assembly 320. The defective LCD screen transferred by the unloading and transferring mechanism 700 is placed on the defective product conveying mechanism 810, and the good product LCD screen transferred by the unloading and transferring mechanism 700 is placed on the rear flip assembly 940 and transferred to the good product conveying mechanism 820 by the rear flip assembly 940.

[0077] The loading device 2, the detection device 3, the material taking device 4 and the unloading device 5 are respectively operated by the control device, and the loading, position correction, transfer, detection and unloading operations of the liquid crystal screen are realized by the control device.

[0078] The working process of the present invention is as follows:

[0079] 1. LCD screen loading and position correction

[0080] The LCD screen 6 to be tested is transported forward to the bottom of the first imaging component 210 by the front transport mechanism 100, so that the first imaging component 210 obtains the position of the LCD screen 6 to be tested, and the first grabbing component 220 rotates the LCD screen 6 to be tested to a suitable angle according to the position to correct the loading position of the LCD screen 6 to be tested. Then, the first grabbing component 220 transfers the LCD screen 6 to be tested to the front transfer table 310 through the moving component 230.

[0081] 2. Material collection and testing

[0082] The second grabbing component 675 of the feed transfer mechanism 600 moves horizontally to the front transfer table 310, grabs the LCD screen 6 to be tested on the front transfer table 310, and transfers the LCD screen 6 to be tested to each detection device 3 in turn, so that the LCD screen 6 to be tested is loaded onto each transfer table 440 respectively, and then the transfer table 440 moves longitudinally to the second imaging component 550 for image acquisition, thereby completing the detection of the LCD screen.

[0083] 3. Cutting

[0084] The second grabbing assembly 675 of the unloading transfer mechanism 700 moves horizontally to each transfer platform 440, grabs the LCD screen that has been inspected on each transfer platform 440, and transfers it to the top of the defective product conveying mechanism 810. The defective LCD screen is directly placed on the defective product conveying mechanism 810 for subsequent processing. For the good LCD screen, the rear flip assembly 940 first moves to the bottom of the second grabbing assembly 675, grabs the LCD screen on the second grabbing assembly 675, and then moves it to the good product conveying mechanism 820, and is conveyed backward by the good product conveying mechanism 820 for collection.

[0085] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An AOI automatic inspection device for LCD screen circuits, characterized in that: The machine comprises a frame, a control device, a loading device, a detection device, a material taking device and a material unloading device arranged on the frame, wherein: The loading device includes a front conveying mechanism, a position correction mechanism and a front transfer mechanism. The front conveying mechanism is arranged on the frame and is used to convey the LCD screen to be tested. The position correction mechanism is arranged above the front conveying mechanism and is used to correct the position of the LCD screen to be tested and transfer the LCD screen to be tested to the front transfer mechanism. The detection device is arranged behind the loading device, and comprises a transfer mechanism and a detection mechanism. The transfer mechanism can move along the longitudinal direction of the frame, and the detection mechanism is arranged above the transfer mechanism, and the LCD screen to be tested is detected by the detection mechanism; The material taking device is arranged between the loading device and the unloading device, and comprises a feeding transfer mechanism and a discharging transfer mechanism. The feeding transfer mechanism transfers the LCD screen to be tested on the front transfer mechanism to the transfer mechanism, and the discharging transfer mechanism transfers the LCD screen tested by the detection mechanism on the transfer mechanism to the unloading device. The unloading device is arranged behind the detection device and is used to convey good LCD screens and bad LCD screens; The feeding device, the detection device, the material taking device and the unloading device are respectively operated by the control device; The number of the detection devices includes at least four, and the detection devices are arranged in parallel in sequence. The material taking device is arranged between the loading device and the unloading device, and is arranged in the transverse direction of the detection devices.

2. The AOI automatic inspection device for LCD circuits according to claim 1, characterized in that: The position correction mechanism includes a first imaging component, a first grabbing component, and a moving component, wherein: The first imaging component is arranged directly above the front conveying mechanism and is used to capture the image of the LCD screen to be tested passing by; The first grabbing assembly includes a first mounting seat, a rotating member and a first suction cup, wherein the first mounting seat is located above the front conveying mechanism, the rotating member is disposed on the first mounting seat, the first suction cup is disposed on the rotating member, the first suction cup is used to grab the LCD screen to be tested, and the first suction cup can be driven to rotate by the rotating member; The moving assembly includes a transverse moving member, a longitudinal moving member and a vertical moving member. The transverse moving member is arranged on the side of the front conveying mechanism, the longitudinal moving member is arranged on the transverse moving member, and it moves in the transverse direction of the front conveying mechanism through the transverse moving member. The vertical moving member is arranged on the longitudinal moving member, and it moves in the longitudinal direction of the front conveying mechanism through the longitudinal moving member. The first mounting seat is arranged on the vertical moving member, and it moves in the vertical direction of the front conveying mechanism through the vertical moving member.

3. The AOI automatic inspection device for LCD circuits according to claim 2, characterized in that: The transverse moving member comprises a first base, a transverse moving screw, a transverse moving motor and a transverse moving slide, wherein the first base is arranged on the frame, the transverse moving screw is rotatably arranged on the first base and driven by the transverse moving motor, and the transverse moving slide cooperates with the transverse moving screw; The longitudinal moving member comprises a second base, a longitudinal moving screw, a longitudinal moving motor and a longitudinal moving slide, wherein the second base is fixedly mounted on the transverse moving slide, the longitudinal moving screw is rotatably mounted on the second base and driven by the longitudinal moving motor, and the longitudinal moving slide cooperates with the longitudinal moving screw; The vertical moving member comprises a third base, a vertical guide rail and a vertical moving cylinder, the third base is fixed on the longitudinal moving slide, the vertical guide rail and the vertical moving cylinder are both arranged on the third base, the first mounting seat is arranged on the vertical guide rail, and is driven by the vertical moving cylinder to move along the vertical guide rail; The rotating member comprises a servo motor and a connecting seat. The servo motor is arranged on the first mounting seat. The connecting seat is arranged below the first mounting seat and connected to the shaft of the servo motor. The first suction cup is fixed on the connecting seat.

4. The AOI automatic inspection device for LCD circuits according to claim 2, characterized in that: The front transfer mechanism includes a front transfer table and a front flip assembly; the front transfer table and the front flip assembly are sequentially arranged behind the front conveying mechanism, and the first grabbing assembly transfers the LCD screen to be tested after the position is corrected to the front transfer table through the moving assembly; the front flip assembly includes a flip seat, a flip motor, a flip shaft, a second suction cup and an angle sensor, the flip seat is arranged on the frame, the flip motor is arranged on the flip seat, the flip shaft is rotatably arranged on the flip seat and is connected to the shaft of the flip motor, the second suction cup and the angle sensor are both connected to the flip shaft and rotate with the flip shaft, and the second suction cup is used to grab the LCD screen to be tested on the front transfer table.

5. The AOI automatic inspection device for LCD circuits according to claim 1, characterized in that: The transferring mechanism includes a fourth base, a transferring screw, a transferring motor, a transferring slide and a transferring platform. The fourth base is longitudinally arranged on the frame, the transferring screw is rotatably arranged on the fourth base and is driven by the transferring motor, the transferring slide cooperates with the transferring screw, and the transferring platform is fixed on the transferring slide; a first support is provided above the fourth base; the detection mechanism includes a fifth base, a detection screw, a detection motor, a detection slide, a second mounting seat and a second imaging component, the fifth base is transversely arranged on the first support, the detection screw is rotatably arranged on the fifth base and is driven by the detection motor, the detection slide cooperates with the detection screw, the second mounting seat is fixed on the detection slide, the second imaging component is arranged on the second mounting seat, and can be moved to the top of the transferring platform.

6. The AOI automatic inspection device for LCD circuits according to claim 5, characterized in that: The second imaging component includes a camera, a third mounting seat, a light source, a code reader and a distance digital display. The camera is mounted on the second mounting seat. The third mounting seat is a frame-shaped structure, which is fixed on the second mounting seat and located on the front side of the camera. The light source and the code reader are mounted on the third mounting seat, and the distance digital display is mounted on the second mounting seat.

7. The AOI automatic inspection device for LCD circuits according to claim 1, characterized in that: The feeding transfer mechanism and the unloading transfer mechanism both include a sixth base, a pulley assembly, a transfer motor, a transfer slide and a second grabbing assembly. The frame is provided with a second support. The sixth base is laterally arranged on the second support. The pulley assembly is arranged in the sixth base and is driven by the transfer motor. The transfer slide is arranged on the sixth base and is moved by the pulley assembly. The second grabbing assembly is fixed on the transfer slide. The second grabbing assembly of the feeding transfer mechanism transfers the LCD screen to be tested on the front transfer mechanism to the transfer mechanism. The second grabbing assembly of the unloading transfer mechanism transfers the LCD screen detected by the detection mechanism on the transfer mechanism to the unloading device.

8. The AOI automatic inspection device for LCD circuits according to claim 7, characterized in that: The second grabbing assembly includes a screw module, a fourth mounting seat and a third suction cup, the screw module is fixed on the transfer slide, the fourth mounting seat is connected to the screw module, and the third suction cup is arranged at the bottom of the fourth mounting seat, and is used to grab the LCD screen to be tested on the front transfer mechanism / the LCD screen on the transfer mechanism; a mounting frame is provided below the sixth base, and an ion blower is provided on the mounting frame, and the ion blower is located above each detection mechanism.

9. The AOI automatic inspection device for LCD circuits according to claim 4, characterized in that: The unloading device includes a rear conveying mechanism and a unloading mechanism, the rear conveying mechanism includes a defective product conveying mechanism and a good product conveying mechanism, the unloading mechanism is arranged between the defective product conveying mechanism and the good product conveying mechanism, the unloading mechanism includes a seventh base, a unloading screw rod, a unloading motor, an unloading slide and a rear flipping assembly, the seventh base is longitudinally arranged on the frame, the unloading screw rod is rotatably arranged on the seventh base and is driven by the unloading motor, the unloading slide cooperates with the unloading screw rod, the rear flipping assembly is fixed on the unloading slide, and the structure of the rear flipping assembly is consistent with the structure of the front flipping assembly, the defective LCD screen transferred by the unloading transfer mechanism is placed on the defective product conveying mechanism, and the good LCD screen transferred by the unloading transfer mechanism is placed on the rear flipping assembly, and is transferred to the good product conveying mechanism by the rear flipping assembly.

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