Liquid crystal glass substrate edge detection mechanism

Abstract

The utility model discloses a kind of liquid crystal glass substrate edge detection mechanisms, belong to liquid crystal glass substrate detection technical field.The device includes the driving device being arranged in double-track conveying device inside, driving device output end is installed with driving box, driving box is provided with the lifting mechanism for lifting liquid crystal glass substrate on double-track conveying device, double-track conveying device side is provided with support frame, support frame extends to driving device top, the position of support frame above driving device is cooperatively provided with guide rail, and the electric slide block that moves laterally along guide rail.The utility model when using, when driving device drives liquid crystal glass substrate to rotate, two groups of electric slide block will follow the corresponding one side edge of liquid crystal glass substrate and move, to realize the all-round detection to edge state, two groups of high-precision camera detect together, improve overall detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal glass substrate inspection technology, and in particular to an edge inspection mechanism for liquid crystal glass substrates. Background Technology

[0002] Liquid crystal glass substrate inspection is the process of quality assessment of the liquid crystal glass substrate, a key material in the manufacture of liquid crystal display panels. The inspection covers aspects such as appearance, dimensions, and physical and chemical properties. Visually, it involves checking for defects such as scratches and bubbles.

[0003] In the LCD glass substrate production process, edge inspection is crucial because the edges of LCD glass substrates are relatively weak, with poor impact and deformation resistance. During cutting, uneven stress on the edges can easily lead to cracks, burrs, or scratches, affecting substrate quality. During inspection, the LCD glass substrates are transferred to the inspection station via a conveyor, where a high-definition camera inspection system is installed. The camera, with its high resolution and precise imaging capabilities, performs a comprehensive scan of the substrate edges, identifying cracks, chipped edges, and excess burrs. The system's built-in intelligent algorithm quickly analyzes and compares the images; once a substrate is determined to be defective, its code is automatically recorded. Subsequently, a suction cup device precisely locates the defective substrate, lifts it, and smoothly transfers it to a transport box. When repairing LCD glass substrates, staff retrieve the defective product code information, pinpoint the specific defect location, and implement targeted remedial measures to minimize losses.

[0004] The shortcomings of the existing technical solutions are as follows: In the edge detection stage of the liquid crystal glass substrate, due to the large area and long edges of the substrate, the camera needs to move a considerable distance to complete a full-range scan. This increases the detection time, and the liquid crystal glass substrate remains stuck at the edge detection position for an extended period, unable to proceed to subsequent processes in a timely manner, severely impacting overall production efficiency. Utility Model Content

[0005] This invention provides an edge detection mechanism for a liquid crystal glass substrate, which can solve the problem of low camera detection efficiency due to the large substrate area and long edges in the prior art.

[0006] An edge detection mechanism for a liquid crystal glass substrate includes a driving device disposed inside a dual-track conveyor. A drive box is mounted on the output end of the driving device. The drive box is provided with a lifting mechanism for lifting the liquid crystal glass substrate on the dual-track conveyor. A support frame is provided on the side of the dual-track conveyor, extending above the driving device. Guide rails are provided on both sides of the support frame. An electric slider is provided on each set of guide rails. A high-precision camera for inspecting the edge of the liquid crystal glass substrate is provided at the bottom of each set of electric sliders.

[0007] As a further embodiment of this utility model: the lifting mechanism includes an electric extension and lifting device fixedly installed inside the drive box, and the electric extension and lifting device is provided with a negative pressure adsorption component for fixing the liquid crystal glass substrate.

[0008] As a further embodiment of this utility model: a connecting plate is fixedly provided at the output end of the electric extension and lifting device, and multiple sets of support rods are fixedly arranged around the connecting plate, with the negative pressure adsorption component positioned above the support rods.

[0009] As a further embodiment of this utility model: the connecting plate is located inside the drive box, and multiple sets of through holes are opened around the drive box, with each set of support rods passing through the corresponding through hole.

[0010] As a further embodiment of this utility model: the negative pressure adsorption assembly includes a support ring fixedly fitted to the upper end of the support rod, an elastic negative pressure disk fixedly disposed inside the support ring, a connector fixedly disposed at the upper end of the drive box, and the upper end of the connector being fixedly connected to the bottom of the elastic negative pressure disk.

[0011] As a further embodiment of this utility model: the elastic negative pressure disc is in the shape of a bucket with high edges and low center.

[0012] As a further embodiment of this utility model: a silicone pad that contacts the liquid crystal glass substrate is fixedly provided on the upper edge of the support ring.

[0013] As a further embodiment of this utility model: the driving device includes a servo motor, and the output end of the servo motor is fixedly connected to the drive box.

[0014] As a further embodiment of this utility model: the electric extension and lifting device is an electric telescopic rod.

[0015] As a further embodiment of this invention, the support ring is made of a rigid material.

[0016] The beneficial effects of this utility model are:

[0017] 1. In use, when the driving device rotates the liquid crystal glass substrate, two sets of electric sliders move along the corresponding edge of the liquid crystal glass substrate, ensuring that the high-precision camera is always aligned with the continuously moving edge of the liquid crystal glass substrate. When the liquid crystal glass substrate rotates 180°, its two edges are fully scanned by the high-precision cameras on both sides, thereby achieving all-round detection of the edge condition. The two sets of high-precision cameras work together to improve the overall detection efficiency.

[0018] 2. In use, when fixing the liquid crystal glass substrate, the support ring fixed at the upper end of the support rod rises accordingly, lifting the liquid crystal glass substrate on the dual-track conveyor. As the support ring continues to move upward, the support ring, the elastic negative pressure plate fixed inside the support ring, and the lifted liquid crystal glass substrate together form a sealed space. Since the bottom of the elastic negative pressure plate is fixedly connected to the drive box through a connector, when the support ring moves upward, the bottom of the elastic negative pressure plate is relatively fixed, while the edge stretches as the support ring moves upward, creating a negative pressure state inside the sealed space. This achieves negative pressure adsorption and fixation of the liquid crystal glass substrate, ensuring its stability during the testing process. The lifting mechanism adopts a negative pressure adsorption and fixation method to ensure the stability of the liquid crystal glass substrate during testing, avoiding testing errors caused by shaking or displacement. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a liquid crystal glass substrate edge detection mechanism for detecting a liquid crystal glass substrate provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of a liquid crystal glass substrate edge detection mechanism after detecting a liquid crystal glass substrate, provided by this utility model;

[0021] Figure 3 A schematic diagram of the structure of a liquid crystal glass substrate edge detection mechanism for negative pressure fixing of a liquid crystal glass substrate provided by this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of a liquid crystal glass substrate edge detection mechanism that supports the liquid crystal glass substrate according to the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Dual-track conveyor; 2. Drive unit; 3. Drive box; 301. Through-hole; 4. Lifting mechanism; 401. Electric extension and lifting device; 402. Connecting plate; 403. Support rod; 404. Support ring; 405. Elastic negative pressure plate; 406. Connecting piece; 5. Support frame; 6. Electric slider; 7. High-precision camera. Detailed Implementation

[0025] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0026] like Figures 1 to 4As shown in the figure, the embodiment of this utility model provides a liquid crystal glass substrate edge detection mechanism, including a driving device 2 disposed inside a dual-track conveying device 1. In practical applications, the driving device 2 is preferably a servo motor. The servo motor has high-precision speed and position control capabilities, which can provide stable and accurate power support for subsequent operations. In addition to the servo motor, other devices with rotational functions can also be used as alternatives to the driving device 2 to meet different production needs and cost control requirements, and all fall within the scope of protection of this patent.

[0027] A drive box 3 is installed on the output end of the drive device 2. The drive box 3 is equipped with a lifting mechanism 4 for supporting the liquid crystal glass substrate on the dual-track conveyor 1. The specific structure of the lifting mechanism 4 is as follows: Inside the drive box 3, an electric extension and lifting device 401 is fixedly installed. The electric extension and lifting device 401 is preferably an electric telescopic rod, and the electric extension and lifting device 401 has precise lifting control capability. The output end of the electric extension and lifting device 401 is fixedly connected to a connecting plate 402. Multiple sets of through holes 301 are opened around the drive box 3, and multiple sets of support rods 403 are fixedly installed around the connecting plate 402. These support rods 403 pass through the corresponding through holes 301 one by one, thereby realizing the connection between the connecting plate 402 and the external components. A support ring 404 is fixedly fitted at the upper end of all support rods 403. The support ring 404 is made of hard metal and serves as a component that directly supports the liquid crystal glass substrate. An elastic negative pressure plate 405 is fixedly installed on the inner side of the support ring 404. The elastic negative pressure plate 405 is shaped like a bucket with high edges and low center, which lays the foundation for its subsequent negative pressure adsorption function.

[0028] In actual operation, the electric lifting device 401 drives the support rod 403 to move up and down, and the movement of the support rod 403 further drives the support ring 404 to move up and down. A connector 406 is also fixedly installed at the upper end of the drive box 3, and the upper end of the connector 406 is fixedly connected to the bottom of the elastic negative pressure plate 405. When the support ring 404 moves upward, it gradually lifts the liquid crystal glass substrate located on the dual-track conveyor 1. As the support ring 404 continues to move upward, the support ring 404, the elastic negative pressure plate 405, and the liquid crystal glass substrate together form a sealed space. At this time, because the bottom of the elastic negative pressure plate 405 moves downward under the action of the connector 406, the air volume inside the sealed space increases, thus forming a negative pressure state. This negative pressure state generates a certain adsorption force, thereby achieving a negative pressure adsorption and fixation effect on the liquid crystal glass substrate, ensuring that the liquid crystal glass substrate remains stable during subsequent testing and operation, without shaking or displacement.

[0029] In addition, to ensure a proper seal between the supporting mechanism 4 and the liquid crystal glass substrate, a silicone pad is fixedly installed on the upper edge of the support ring 404, which contacts the liquid crystal glass substrate. The silicone pad has good flexibility and sealing properties, effectively filling the gap between the liquid crystal glass substrate and the support ring 404, preventing air leakage, thereby further ensuring the negative pressure effect of the sealed space and improving the overall reliability and stability of the supporting mechanism 4.

[0030] A support frame 5 is provided on the side of the dual-track conveyor 1, extending above the drive unit 2. A guide rail and an electric slider 6 capable of lateral movement along the guide rail are installed on the support frame 5 above the drive unit 2. A high-precision camera 7 for inspecting the edges of the liquid crystal glass substrate is installed at the bottom of the electric slider 6. The high-precision camera 7 is the "eye" of the entire inspection system. It analyzes and processes the acquired images using advanced image algorithms (edge ​​detection operators), accurately identifying grayscale changes and thus detecting minute anomalies such as burrs and scratches on the edges of the liquid crystal glass substrate. These minute anomalies have a significant impact on the quality of the liquid crystal glass substrate; the high-precision camera 7 can detect and record them in a timely manner, providing a basis for subsequent processing.

[0031] In this embodiment, two sets of guide rails, electric sliders 6, and high-precision cameras 7 are provided. Each set of high-precision cameras 7 is mounted on a corresponding electric slider 6, and the two sets of guide rails and electric sliders 6 are symmetrically arranged on the support frame 5 above the drive device 2. This symmetrical arrangement design allows the two sets of detection components to simultaneously detect both sides of the liquid crystal glass substrate, greatly improving detection efficiency. When the drive device 2 rotates the liquid crystal glass substrate, the two sets of electric sliders 6 move accordingly with one side of the liquid crystal glass substrate, ensuring that the high-precision cameras 7 are always aligned with the continuously moving edge of the liquid crystal glass substrate. When the liquid crystal glass substrate rotates 180°, the edges on both sides of the glass substrate are fully scanned by the high-precision cameras 7 on both sides, thereby achieving omnidirectional detection of the edge state.

[0032] However, special attention needs to be paid to the wiring during the rotation of the drive unit 2 and the drive housing 3. Since the drive housing 3 is connected to multiple sets of wires (not shown in the figure), to prevent damage from excessive pulling, the drive unit 2 rotates the liquid crystal glass substrate 180° counterclockwise and clockwise alternately in sequence while rotating the drive housing 3. This alternating rotation effectively prevents wire tangling, ensures proper wire connection and signal transmission, and guarantees the stable operation of the entire detection system.

[0033] Working principle: First, the liquid crystal glass substrate is conveyed to the inspection station via a dual-track conveyor 1. At this time, the drive device 2, located inside the dual-track conveyor 1, is activated, causing the drive box 3 mounted on its output end to rotate. The lifting mechanism 4 on the drive box 3 then actuates, activating the electric extension and lifting device 401 fixed inside the drive box 3. Its output end drives the connecting plate 402 to rise, thereby causing the support rod 403, which passes through the through-hole 301 on the drive box 3, to move upward. The support ring 404 fixed at the upper end of the support rod 403 then rises, lifting the liquid crystal glass substrate on the dual-track conveyor 1.

[0034] As the support ring 404 continues to move upward, the support ring 404, the elastic negative pressure plate 405 fixed inside the support ring 404, and the lifted liquid crystal glass substrate together form a sealed space. Since the bottom of the elastic negative pressure plate 405 is fixedly connected to the drive box 3 through the connector 406, when the support ring 404 moves upward, the bottom of the elastic negative pressure plate 405 is relatively fixed, while the edge stretches as the support ring 404 moves upward, creating a negative pressure state inside the sealed space. This achieves negative pressure adsorption and fixation of the liquid crystal glass substrate, ensuring its stability during the testing process.

[0035] Simultaneously, two sets of electric sliders 6, mounted on the side support frame 5 of the dual-rail conveyor 1, begin operation. These two sets of electric sliders 6 are symmetrically positioned on the guide rail above the drive device 2 and move laterally along the guide rail to adapt to the edge position of the liquid crystal glass substrate. Each set of electric sliders 6 is equipped with a high-precision camera 7 at its bottom. The high-precision camera 7 is aimed at the edge of the liquid crystal glass substrate and performs real-time scanning of the edge using image algorithms to detect any minor abnormalities such as burrs or scratches.

[0036] When the drive unit 2 rotates the liquid crystal glass substrate, the two sets of electric sliders 6 move along the corresponding edge of the liquid crystal glass substrate, ensuring that the high-precision camera 7 is always aligned with the constantly moving edge of the liquid crystal glass substrate. When the liquid crystal glass substrate rotates 180°, its two edges are fully scanned by the high-precision cameras 7 on both sides, thus achieving all-round detection of the edge status. To avoid the wires on the drive box 3 from getting tangled due to rotation, the drive unit 2 uses an alternating 180° counterclockwise and clockwise rotation method.

[0037] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A liquid crystal glass substrate edge detection mechanism comprising a driving device (2) arranged inside a double-track conveying device (1), characterized in that, The drive unit (2) is equipped with a drive box (3) at its output end. The drive box (3) is provided with a lifting mechanism (4) for lifting the liquid crystal glass substrate on the dual-track conveyor (1). The dual-track conveyor (1) is provided with a support frame (5) on its side. The support frame (5) extends above the drive unit (2). The support frame (5) is provided with guide rails on both sides. Each set of guide rails is provided with an electric slider (6). Each set of electric sliders (6) is provided with a high-precision camera (7) at the bottom for checking the edge condition of the liquid crystal glass substrate.

2. The liquid crystal glass substrate edge detection mechanism according to claim 1, wherein The lifting mechanism (4) includes an electric lifting device (401) fixedly installed inside the drive box (3), and the electric lifting device (401) is provided with a negative pressure adsorption component for fixing the liquid crystal glass substrate.

3. The liquid crystal glass substrate edge detection mechanism according to claim 2, wherein The output end of the electric extension and lifting device (401) is fixedly provided with a connecting plate (402), and multiple sets of support rods (403) are fixedly arranged around the connecting plate (402). The negative pressure adsorption component is arranged above the support rods (403).

4. The liquid crystal glass substrate edge detection mechanism according to claim 3, wherein The connecting plate (402) is located inside the drive box (3). Multiple sets of through holes (301) are opened around the drive box (3), and each set of support rods (403) passes through the corresponding through hole (301).

5. The liquid crystal glass substrate edge detection mechanism according to claim 4, wherein The negative pressure adsorption assembly includes a support ring (404) fixedly fitted to the upper end of the support rod (403), an elastic negative pressure plate (405) fixedly disposed inside the support ring (404), and a connector (406) fixedly disposed at the upper end of the drive box (3), the upper end of the connector (406) being fixedly connected to the bottom of the elastic negative pressure plate (405).

6. The liquid crystal glass substrate edge detection mechanism according to claim 5, wherein The elastic negative pressure plate (405) is in the shape of a bucket with high edges and low center.

7. The liquid crystal glass substrate edge detection mechanism according to claim 5, wherein The upper edge of the support ring (404) is fixedly provided with a silicone pad that contacts the liquid crystal glass substrate.

8. The liquid crystal glass substrate edge detection mechanism according to claim 4, wherein The drive device (2) includes a servo motor, and the output end of the servo motor is fixedly connected to the drive box (3).

9. The liquid crystal glass substrate edge detection mechanism of claim 2, wherein, The electric telescopic lifting device (401) is an electric telescopic rod.

10. The liquid crystal glass substrate edge detection mechanism of claim 5, wherein, The support ring (404) is made of a rigid material.

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