An optical inspection device for liquid crystal display modules

Abstract

This utility model relates to the field of optical inspection technology, specifically to an optical inspection device for liquid crystal display modules. It includes a conveying device and an inspection device. The inspection device includes a housing, with a mounting frame fixedly installed on the inner wall of the housing. A mounting column is fixedly connected to the bottom end of the mounting frame, and a mounting plate is fixedly connected to the bottom end of the mounting column. An inspection lens is fixedly installed at the bottom end of the mounting plate. Symmetrically arranged limiting structures one and two are installed inside the housing. Limiting structure one includes an electric cylinder one, which is fixedly installed on the inner wall of the housing. The output end of the electric cylinder one is fixedly connected to the limiting plate one. This optical inspection device for liquid crystal display modules can accurately position the display screen, thereby greatly improving the inspection effect. It has high applicability and is conducive to practical application.

Description

Technical Field

[0001] This utility model relates to the field of optical inspection technology, specifically to an optical inspection device for liquid crystal display modules. Background Technology

[0002] Liquid crystal display (LCD) is a type of flat panel display used in televisions and computers. Its advantages include low power consumption, small size, and low radiation. LCDs utilize a liquid crystal solution in two polarizing materials; when an electric current passes through the liquid, the crystals rearrange to achieve image formation. Current technology primarily uses industrial cameras, lenses, light sources, image acquisition cards, and industrial computers to acquire and process images of appearance defects in LCDs, ultimately providing visual inspection results to ensure product appearance quality control.

[0003] A search revealed that Chinese Patent Publication No. CN119574564A discloses an optical inspection device for liquid crystal display modules. Its main function is to perform optical inspection from multiple angles and facilitate double-sided inspection, effectively reducing the limitations of optical inspection of liquid crystal display modules. However, in actual use, it lacks a positioning device for the display screen. When the position of the display screen deviates from the required inspection position, it is easy to cause poor accuracy of the inspection results, thereby reducing the inspection effect.

[0004] To address this issue, we propose an optical inspection device for liquid crystal display modules. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an optical inspection device for liquid crystal display modules, thereby solving the problem mentioned in the background art where the existing technology lacks a positioning device for the display screen, resulting in low inspection performance.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an optical inspection device for a liquid crystal display module, comprising a conveying device and an inspection device, characterized in that: the inspection device comprises an outer shell, an installation frame is fixedly installed on the inner wall of the outer shell, an installation column is fixedly connected to the bottom end of the installation frame, an installation plate is fixedly connected to the bottom end of the installation column, an inspection lens is fixedly installed at the bottom end of the installation plate, and a symmetrically arranged limiting structure one and limiting structure two are installed inside the outer shell; The limiting structure includes an electric cylinder, which is fixedly installed on the inner wall of the outer shell, and the output end of the electric cylinder is fixedly connected to a limiting plate. The limiting structure two includes an electric cylinder two, the output end of the electric cylinder two is fixedly connected to a moving plate, the inside of the moving plate is fixedly installed with an electric cylinder three, and the output end of the electric cylinder three is fixedly connected to the limiting plate two. The conveying device includes a conveyor frame, inside which two conveyor rollers 1 and multiple conveyor rollers 2 are rotatably mounted. A conveyor belt is driven between the two conveyor rollers 1. A conveyor motor is fixedly mounted on the outer wall of the conveyor frame, and the output end of the conveyor motor is fixedly connected to the conveyor rollers 1.

[0008] Preferably, a positioning structure is installed inside the outer shell. The positioning structure includes a fixing block, which is fixedly connected to the bottom end of the mounting bracket. A bidirectional screw is rotatably installed inside the fixing block, and two symmetrically arranged sliders are slidably arranged inside the fixing block. The bidirectional screw is threadedly connected to the sliders, and a positioning block is fixedly connected to the bottom end of the slider.

[0009] Preferably, there are two positioning structures, which are arranged perpendicularly to each other on a horizontal plane.

[0010] Preferably, a contact switch is fixedly installed inside the positioning block, a pointer is fixedly connected to the outer wall of the positioning block, an indicator scale is engraved on the outer wall of the fixed block, and a crank is fixedly connected to the outer wall of the bidirectional screw.

[0011] Preferably, a limiting telescopic rod is installed between the outer shell and the limiting plate.

[0012] Preferably, a limiting rod is fixedly connected to the top of the second limiting plate, and the limiting rod is slidably installed inside the movable plate.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides an optical inspection device for liquid crystal display modules, which has the following beneficial effects: When the first electric cylinder of this LCD module is working, it enables the first limiting plate to clamp the display screen on the conveyor belt. When the third electric cylinder is working, it enables the second limiting plate to move downward and fit against the conveyor belt. When the second electric cylinder is working, it can drive the second limiting plate to further clamp the display screen, thereby facilitating the fixation of the display screen position and preventing the actual position of the display screen from deviating from the position required for inspection. This facilitates the inspection lens to inspect the display screen, greatly improves the accuracy of inspection, and thus improves the inspection effect, which is beneficial for practical applications. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the outer shell of this utility model; Figure 3 This is a cross-sectional view of the internal structure of the conveyor frame of this utility model; Figure 4 This is a cross-sectional view of the internal structure of the fixing block of this utility model.

[0016] In the diagram: 1. Outer shell; 2. Mounting bracket; 3. Mounting column; 4. Mounting plate; 5. Detection lens; 6. Electric cylinder one; 7. Limiting plate one; 8. Electric cylinder two; 9. Moving plate; 10. Electric cylinder three; 11. Limiting plate two; 12. Conveyor frame; 13. Conveyor roller one; 14. Conveyor roller two; 15. Conveyor belt; 16. Conveyor motor; 17. Fixing block; 18. Bidirectional screw; 19. Slider; 20. Positioning block; 21. Contact switch; 22. Pointer; 23. Indicating scale; 24. Handle; 25. Limiting telescopic rod; 26. Limiting rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] Please see Figure 1-4 An optical inspection device for liquid crystal display modules includes a conveying device and an inspection device. The inspection device includes a housing 1, a mounting frame 2 fixedly mounted on the inner wall of the housing 1, a mounting post 3 fixedly connected to the bottom end of the mounting frame 2, a mounting plate 4 fixedly connected to the bottom end of the mounting post 3, and an inspection lens 5 fixedly mounted to the bottom end of the mounting plate 4. A symmetrically arranged limiting structure one and a limiting structure two are installed inside the housing 1. The limiting structure one includes an electric cylinder 6, which is fixedly mounted on the inner wall of the housing 1. The output end of the electric cylinder 6 is fixedly connected to a limiting structure. Plate 1 7, limiting structure 2 includes electric cylinder 2 8, the output end of electric cylinder 2 8 is fixedly connected to a moving plate 9, electric cylinder 3 10 is fixedly installed inside the moving plate 9, the output end of electric cylinder 3 10 is fixedly connected to a limiting plate 2 11, the conveying device includes a conveying frame 12, two conveying rollers 1 13 and multiple conveying rollers 2 14 are rotatably installed inside the conveying frame 12, a conveyor belt 15 is connected between the two conveying rollers 1 13, a conveying motor 16 is fixedly installed on the outer wall of the conveying frame 12, and the output end of the conveying motor 16 is fixedly connected to the conveying rollers 1 13.

[0019] When the conveyor motor 16 is working, it drives the conveyor roller 13 to rotate, which in turn drives the conveyor belt 15 to move, thus facilitating the transportation of the display screen. The conveyor roller 14 provides additional support for the conveyor belt 15, ensuring the stability of the transportation process. When the electric cylinder 6 is working, it drives the limiting plate 7 to move, causing the limiting plate 7 to contact the display screen and limit its position. When the electric cylinder 10 is working, it causes the limiting plate 11 to contact the conveyor belt 15. When the electric cylinder 8 is working, it causes the moving block to move, causing the limiting plate 11 to contact the display screen, further positioning the display screen. Under the combined action of the limiting plate 7 and the limiting plate 11, the position of the display screen is prevented from deviating from the actual required detection position, facilitating the detection lens 5 to detect the display screen and improving the accuracy of the detection results, thus improving the detection effect. Since the limiting plate 11 can move under the action of the electric cylinder 10, it ensures that the display screen is transported normally by the conveyor belt 15.

[0020] Please see Figure 2 and Figure 4 The housing 1 has a positioning structure installed inside. The positioning structure includes a fixing block 17, which is fixedly connected to the bottom of the mounting bracket 2. A bidirectional screw 18 is rotatably installed inside the fixing block 17, and two symmetrically arranged sliders 19 are slidably arranged inside the fixing block 17. The bidirectional screw 18 is threadedly connected to the sliders 19, and a positioning block 20 is fixedly connected to the bottom of the sliders 19.

[0021] By rotating the bidirectional screw 18, the slider 19 can drive the positioning block 20 to move. There are two positioning structures, which are perpendicular to each other on the horizontal plane. The positioning block 20 facilitates the positioning of the first and second limiting structures, thereby improving the positioning effect of the display screen and further improving the positioning accuracy.

[0022] Please see Figure 2 and Figure 4 A contact switch 21 is fixedly installed inside the positioning block 20. A pointer 22 is fixedly connected to the outer wall of the positioning block 20. An indicator scale 23 is engraved on the outer wall of the fixing block 17. A crank 24 is fixedly connected to the outer wall of the bidirectional screw 18.

[0023] The crank handle 24 facilitates the rotation of the bidirectional screw 18, and the real-time position of the positioning block 20 can be determined by observing the value indicated by the pointer 22 on the scale 23. When the limit plate 7 or the moving block contacts the contact switch 21, the electric cylinder 6 or the electric cylinder 8 can be stopped by setting the corresponding electrical connection method, which further facilitates the positioning of the display screen. Since the positioning block 20 can move, it is also convenient to position the display screen of different sizes, which helps to improve the applicability of the device.

[0024] Please see Figure 2 A limit telescopic rod 25 is installed between the outer shell 1 and the limit plate 7.

[0025] The limiting telescopic rod 25 can provide a limiting support effect for the limiting plate 7, thereby improving the stability of the limiting plate 7.

[0026] Please see Figure 2 The top of the limiting plate 21 is fixedly connected to the limiting rod 26, which is slidably installed inside the moving plate 9.

[0027] The limiting rod 26 can provide a limiting effect on the limiting plate 2 11, making the limiting plate 2 11 more stable.

[0028] In summary, the working principle and process of this optical inspection equipment for LCD modules are as follows: First, place the equipment at the desired location. Then, based on the actual length and width of the display screen to be inspected, turn the crank handle 24. The positioning block 20 will move accordingly. During this process, observe the indicator scale 23 pointed to by the pointer 22 until the positioning block 20 is in the correct position. Before placing the display screen onto the conveyor belt 15, ensure that the limiting plate 11 does not contact the conveyor belt 15 to ensure the display screen can be properly conveyed by the conveyor belt 15. Afterward, the display screen can be... The display screen is placed on the conveyor belt 15, and the conveyor motor 16 is started, causing the display screen to move to the bottom of the detection lens 5. The conveyor motor 16 is stopped, and the electric cylinder 10 is started, causing the limiting plate 11 to contact the conveyor belt 15. Then, the electric cylinders 6 and 8 are started, causing the limiting plate 7 and the moving block to contact the positioning block 20. The electric cylinders 6 and 8 can then be stopped, thus completing the positioning process of the shell on the display screen. Finally, the display screen can be detected through the detection lens 5, which can greatly improve the detection effect, has high applicability, and is conducive to practical promotion and application.

[0029] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An optical detection apparatus for liquid crystal display modules, comprising a transport device and a detection device, characterized in that: The detection device includes an outer shell (1), an mounting frame (2) is fixedly installed on the inner wall of the outer shell (1), a mounting column (3) is fixedly connected to the bottom end of the mounting frame (2), a mounting plate (4) is fixedly connected to the bottom end of the mounting column (3), a detection lens (5) is fixedly installed at the bottom end of the mounting plate (4), and a symmetrically arranged limiting structure one and limiting structure two are installed inside the outer shell (1). The limiting structure includes an electric cylinder (6), which is fixedly installed on the inner wall of the outer shell (1), and the output end of the electric cylinder (6) is fixedly connected to a limiting plate (7). The second limiting structure includes an electric cylinder two (8), the output end of which is fixedly connected to a moving plate (9), and an electric cylinder three (10) is fixedly installed inside the moving plate (9), and the output end of the electric cylinder three (10) is fixedly connected to a limiting plate two (11). The conveying device includes a conveyor frame (12), inside which two conveyor rollers (13) and multiple conveyor rollers (14) are rotatably installed. A conveyor belt (15) is connected between the two conveyor rollers (13). A conveyor motor (16) is fixedly installed on the outer wall of the conveyor frame (12). The output end of the conveyor motor (16) is fixedly connected to the conveyor rollers (13).

2. The optical detection device for liquid crystal display module according to claim 1, wherein: The outer shell (1) is equipped with a positioning structure, which includes a fixing block (17). The fixing block (17) is fixedly connected to the bottom end of the mounting bracket (2). A bidirectional screw (18) is rotatably installed inside the fixing block (17), and two symmetrically arranged sliders (19) are slidably arranged inside the fixing block (17). The bidirectional screw (18) is threadedly connected to the sliders (19), and a positioning block (20) is fixedly connected to the bottom end of the sliders (19).

3. The optical detection device for liquid crystal display module according to claim 2, wherein: The positioning structure is provided in two parts, and is arranged perpendicular to each other on the horizontal plane.

4. The optical detection device for liquid crystal display module according to claim 2, wherein: A contact switch (21) is fixedly installed inside the positioning block (20), a pointer (22) is fixedly connected to the outer wall of the positioning block (20), an indicator scale (23) is engraved on the outer wall of the fixing block (17), and a crank (24) is fixedly connected to the outer wall of the bidirectional screw (18).

5. The optical detection device for liquid crystal display module according to claim 1, wherein: A limiting telescopic rod (25) is installed between the outer shell (1) and the limiting plate (7).

6. The optical detection device for liquid crystal display module according to claim 1, wherein: The top of the limiting plate 2 (11) is fixedly connected to a limiting rod (26), and the limiting rod (26) is slidably installed inside the movable plate (9).

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