Appearance detection machine for LCD (Liquid Crystal Display) panel

Abstract

The utility model discloses a liquid crystal display (LCD) panel appearance detection machine which comprises a machine table, a feeding conveying mechanism, a first detection mechanism, a second detection mechanism, a finished product discharging mechanism, an NG product discharging mechanism, a first taking and placing mechanism, a second taking and placing mechanism and a transverse moving mechanism are arranged on the machine table, the first detection mechanism is arranged at the discharging end of the feeding conveying mechanism, and the second detection mechanism is arranged at the discharging end of the NG product discharging mechanism. The second detection mechanism is arranged adjacent to the first detection mechanism, the feeding end of the NG product discharging mechanism is arranged adjacent to the second detection mechanism, the feeding end of the finished product discharging mechanism is arranged adjacent to the feeding end of the NG product discharging mechanism, and the transverse moving mechanism extends from the feeding conveying mechanism to the finished product discharging mechanism. The first taking and placing mechanism and the second taking and placing mechanism are both arranged on the transverse moving mechanism. Compared with the prior art, on the basis of the principle, manual operation steps are greatly reduced, so that the automatic performance is higher, the visual detection efficiency is higher, and the process requirements are better met.

Description

Technical Field

[0001] This utility model relates to product testing equipment, and more particularly to an appearance inspection machine for LCD liquid crystal display panels. Background Technology

[0002] Currently, LCD glass products require a full inspection of their appearance before shipment, with as many as twenty or thirty items to be checked. This task cannot be completed manually, and prolonged inspection under light sources can cause visual fatigue, easily leading to missed inspections. With the application of automated equipment, although some equipment can judge the quality of product appearance through visual inspection, equipment that requires front and back inspection still requires manual assistance to flip the product and move its position, which also results in low inspection efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an LCD panel appearance inspection machine with stronger automation performance and higher visual inspection efficiency, in order to address the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] An LCD panel appearance inspection machine includes a machine table. The machine table is equipped with a feeding conveying mechanism, a first inspection mechanism, a second inspection mechanism, a finished product discharge mechanism, a defective product discharge mechanism, a first pick-and-place mechanism, a second pick-and-place mechanism, and a transverse movement mechanism. The first inspection mechanism is located at the discharge end of the feeding conveying mechanism. The second inspection mechanism is adjacent to the first inspection mechanism. The feed end of the defective product discharge mechanism is adjacent to the second inspection mechanism. The feed end of the finished product discharge mechanism is adjacent to the feed end of the defective product discharge mechanism. The transverse movement mechanism extends from the feeding conveying mechanism towards the finished product discharge mechanism. Both the first pick-and-place mechanism and the second pick-and-place mechanism are mounted on the transverse movement mechanism. The first pick-and-place mechanism is used to pick up the workpiece from the discharge end of the feed conveyor and place it at the first detection station of the first detection mechanism, and to acquire an image of the top surface of the workpiece using the first detection mechanism. The second pick-and-place mechanism is used to pick up the workpiece from the first detection mechanism and place it at the second detection station of the second detection mechanism, and to acquire an image of the bottom surface of the workpiece using the second detection mechanism. The second pick-and-place mechanism is also used to pick up the workpiece from the second detection mechanism and place it at the feed end of the finished product discharge mechanism or the feed end of the NG product discharge mechanism according to a preset control command.

[0006] Preferably, the first inspection mechanism includes a first industrial camera, the lens of which is directed toward the first inspection station.

[0007] Preferably, a first lighting mechanism is provided above the first inspection station, and the first lighting mechanism is used to illuminate the workpiece on the first inspection station.

[0008] Preferably, the first lighting mechanism is provided with a clearance opening, which is located between the lens of the first industrial camera and the first inspection station.

[0009] Preferably, the first pick-and-place mechanism includes a first translation support, a first upright plate on the first translation support, a first lifting cylinder on the first upright plate, a first lifting arm on the lifting movement end of the first lifting cylinder, and a first suction claw for picking up the workpiece on the first lifting arm.

[0010] Preferably, the second pick-and-place mechanism includes a second translation support, a second upright plate on the second translation support, a second lifting cylinder and a third lifting cylinder on the second upright plate, a second lifting arm on the lifting movement end of the second lifting cylinder, a second suction claw on the second lifting arm for picking up the workpiece, and a third lifting arm on the lifting movement end of the third lifting cylinder for picking up the workpiece.

[0011] In the LCD panel appearance inspection machine disclosed in this utility model, the LCD workpieces to be inspected are placed one by one on the feeding conveyor mechanism using a front-end device. The feeding conveyor mechanism transports the flat LCD workpieces. Then, the first pick-and-place mechanism picks up the workpieces from the discharge end of the feeding conveyor mechanism and moves them to place them at the first inspection station of the first inspection mechanism. The first inspection mechanism acquires an image of the top surface of the workpiece. Then, the second pick-and-place mechanism moves and picks up the workpieces from the first inspection mechanism and moves them to place them at the second inspection station of the second inspection mechanism. The second inspection mechanism acquires an image of the bottom surface of the workpiece. The images acquired by the first and second inspection mechanisms are uploaded to a preset control system for image processing. The system compares and analyzes whether there are defects in the workpiece surface images. During the unloading process, the second pick-and-place mechanism places qualified workpieces at the inlet end of the finished product unloading mechanism and unqualified workpieces at the inlet end of the NG product unloading mechanism. Compared with the prior art, this utility model greatly reduces the manual operation steps based on the above principle, thus achieving stronger automation performance, higher visual inspection efficiency, and better meeting process requirements. Attached Figure Description

[0012] Figure 1 This utility model provides a three-dimensional inspection machine for the appearance of LCD liquid crystal display panels. Figure 1 ;

[0013] Figure 2 for Figure 1 Enlarged view of section A;

[0014] Figure 3 for Figure 1 Enlarged view of section B;

[0015] Figure 4 This utility model provides a three-dimensional inspection machine for the appearance of LCD liquid crystal display panels. Figure 2 . Detailed Implementation

[0016] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0017] This utility model discloses an LCD liquid crystal display panel appearance inspection machine, combined with Figures 1 to 4 As shown, it includes an organic platform 1, on which are provided a feeding conveying mechanism 2, a first detection mechanism 3, a second detection mechanism 4, a finished product discharge mechanism 5, an NG product discharge mechanism 6, a first pick-and-place mechanism 7, a second pick-and-place mechanism 8, and a transverse movement mechanism 9. The first detection mechanism 3 is located at the discharge end of the feeding conveying mechanism 2. The second detection mechanism 4 is adjacent to the first detection mechanism 3. The feed end of the NG product discharge mechanism 6 is adjacent to the second detection mechanism 4. The feed end of the finished product discharge mechanism 5 is adjacent to the feed end of the NG product discharge mechanism 6. The transverse movement mechanism 9 extends from the feeding conveying mechanism 2 toward the finished product discharge mechanism 5. The first pick-and-place mechanism 7, the second pick-and-place mechanism 8, and the first pick-and-place mechanism 9 are also located at the discharge end of the feeding conveying mechanism 2. Both mechanism 7 and the second pick-and-place mechanism 8 are mounted on the transverse mechanism 9. The first pick-and-place mechanism 7 is used to pick up the workpiece from the discharge end of the feed conveying mechanism 2 and place it at the first detection station of the first detection mechanism 3, and use the first detection mechanism 3 to acquire an image of the top surface of the workpiece. The second pick-and-place mechanism 8 is used to pick up the workpiece from the first detection mechanism 3 and place it at the second detection station of the second detection mechanism 4, and use the second detection mechanism 4 to acquire an image of the bottom surface of the workpiece. The second pick-and-place mechanism 8 is also used to pick up the workpiece from the second detection mechanism 4 and place the workpiece at the feed end of the finished product discharge mechanism 5 or the feed end of the NG product discharge mechanism 6 according to a preset control command.

[0018] In the above structure, the LCD workpieces to be inspected are placed one by one on the feeding conveyor 2 using the front-end equipment. The feeding conveyor 2 transports the flat LCD workpieces. Then, the first pick-and-place mechanism 7 picks up the workpiece from the discharge end of the feeding conveyor 2 and moves it to place it at the first inspection station of the first inspection mechanism 3. The first inspection mechanism 3 acquires an image of the top surface of the workpiece. Then, the second pick-and-place mechanism 8 moves and picks up the workpiece from the first inspection mechanism 3 and moves it to place it at the second inspection station of the second inspection mechanism 4. The second inspection mechanism 4 acquires an image of the bottom surface of the workpiece. The images acquired by the first inspection mechanism 3 and the second inspection mechanism 4 are uploaded to a preset control system for image processing. The images of the workpiece surface are compared and analyzed to see if there are defects. During the unloading process, the second pick-and-place mechanism 8 places qualified workpieces at the feeding end of the finished product unloading mechanism 5 and unqualified workpieces at the feeding end of the NG product unloading mechanism 6. Compared with existing technologies, this invention greatly reduces manual operation steps based on the above principles, thus achieving stronger automation performance, higher visual inspection efficiency, and better meeting process requirements.

[0019] For details regarding the structure of the first testing mechanism 3, please refer to [link / reference]. Figure 1 The first testing mechanism 3 includes a first industrial camera 30, the lens of which faces the first testing station.

[0020] Based on this, a first lighting mechanism 31 is provided above the first inspection station, which is used to illuminate the workpiece on the first inspection station. Further, the first lighting mechanism 31 is provided with a clearance opening 32, which is located between the lens of the first industrial camera 30 and the first inspection station. In this embodiment, the second inspection mechanism 4 has the same working principle, and a second lighting mechanism and a second industrial camera are provided below the second inspection station.

[0021] Please see Figure 2 To achieve material loading and horizontal conveying, in this embodiment, the first pick-and-place mechanism 7 includes a first translation support 70, a first upright plate 71 on the first translation support 70, a first lifting cylinder 72 on the first upright plate 71, a first lifting arm 73 at the lifting end of the first lifting cylinder 72, and a first suction claw for picking up workpieces on the first lifting arm 73. This embodiment preferably uses a cylinder to drive the lifting arm, ensuring accurate and reliable movement and enabling precise pick-and-place actions.

[0022] Please see Figure 3In this embodiment, the second pick-and-place mechanism 8 includes a second translational support 80, a second upright plate 81 on the second translational support 80, a second lifting cylinder 82 and a third lifting cylinder 83 on the second upright plate 81, a second lifting arm 84 on the lifting end of the second lifting cylinder 82, a second suction claw 85 for picking up workpieces on the second lifting arm 84, and a third lifting arm 86 on the lifting end of the third lifting cylinder 83, a third suction claw 87 for picking up workpieces on the third lifting arm 86. During the specific movement, the second upright plate 81 drives the second lifting cylinder 82 and the third lifting cylinder 83 to move synchronously. The second suction claw 85 on the second lifting arm 84 is used to pick up workpieces from the first detection mechanism 3 and place them at the second detection station of the second detection mechanism 4. The third suction claw 87 on the third lifting arm 86 is used to pick up workpieces from the second detection mechanism 4 and place them at the inlet end of the finished product discharge mechanism 5 or the inlet end of the NG product discharge mechanism 6 according to a preset control command.

[0023] The LCD panel appearance inspection machine disclosed in this utility model realizes the function of synchronously transporting workpieces through multi-mechanism linkage, which improves the efficiency of workpiece handling. At the same time, this utility model uses different angles of lighting to present various defects of LCD products on the image, and analyzes and processes the defects through the image processing system, thereby achieving the purpose of visual inspection.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. An appearance inspection machine for LCD liquid crystal display panels, characterized in that, The machine includes an organic platform, which is equipped with a feeding conveyor mechanism, a first detection mechanism, a second detection mechanism, a finished product discharge mechanism, a non-compliant product discharge mechanism, a first pick-and-place mechanism, a second pick-and-place mechanism, and a traversing mechanism. The first detection mechanism is located at the discharge end of the feeding conveyor mechanism, the second detection mechanism is adjacent to the first detection mechanism, the discharge end of the non-compliant product discharge mechanism is adjacent to the second detection mechanism, the discharge end of the finished product discharge mechanism is adjacent to the discharge end of the non-compliant product discharge mechanism, and the traversing mechanism extends from the feeding conveyor mechanism toward the finished product discharge mechanism. The first pick-and-place mechanism and the second detection mechanism are also located on the platform. The second pick-up and place mechanism is mounted on the transverse movement mechanism. The first pick-up and place mechanism is used to pick up the workpiece from the discharge end of the feed conveyor and place it at the first detection station of the first detection mechanism, and use the first detection mechanism to acquire an image of the top surface of the workpiece. The second pick-up and place mechanism is used to pick up the workpiece from the first detection mechanism and place it at the second detection station of the second detection mechanism, and use the second detection mechanism to acquire an image of the bottom surface of the workpiece. The second pick-up and place mechanism is also used to pick up the workpiece from the second detection mechanism and place it at the feed end of the finished product discharge mechanism or the feed end of the NG product discharge mechanism according to a preset control command.

2. The LCD liquid crystal display panel appearance inspection machine as described in claim 1, characterized in that, The first testing mechanism includes a first industrial camera, the lens of which is directed toward the first testing station.

3. The LCD liquid crystal display panel appearance inspection machine as described in claim 2, characterized in that, A first lighting mechanism is provided above the first inspection station, which is used to illuminate the workpiece on the first inspection station.

4. The LCD liquid crystal display panel appearance inspection machine as described in claim 3, characterized in that, The first lighting mechanism is provided with a clearance opening, which is located between the lens of the first industrial camera and the first inspection station.

5. The LCD liquid crystal display panel appearance inspection machine as described in claim 1, characterized in that, The first pick-and-place mechanism includes a first translation support, a first upright plate on the first translation support, a first lifting cylinder on the first upright plate, a first lifting arm on the lifting movement end of the first lifting cylinder, and a first suction claw for picking up the workpiece on the first lifting arm.

6. The LCD liquid crystal display panel appearance inspection machine as described in claim 1, characterized in that, The second pick-and-place mechanism includes a second translation support, a second upright plate on the second translation support, a second lifting cylinder and a third lifting cylinder on the second upright plate, a second lifting arm on the lifting movement end of the second lifting cylinder, a second suction claw on the second lifting arm for picking up the workpiece, and a third lifting arm on the lifting movement end of the third lifting cylinder for picking up the workpiece.

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