Device for detecting appearance defects of STN glass PIN

Abstract

The utility model discloses a device for detecting the appearance defect of STN glass PIN, which comprises a vacuum adsorption platform, a flat light source, a camera and an information processing computer, the vacuum adsorption platform is provided with a bearing surface and a detection surface, the flat light source is arranged on the right side of the detection surface, the upper surface of the bearing surface is provided with a vacuum chuck and a positioning column, and the positioning column is arranged on the right side of the detection surface. The positioning columns and the vacuum suction cups are used for positioning the STN display screen and enabling the PINs to be located on the panel light source. According to the device for detecting the appearance defects of the STN glass PIN, the STN display screen is placed on the pre-alignment vacuum adsorption platform, then the panel light source is lightened, the industrial camera images the PIN, and finally the image is processed and compared by utilizing an algorithm and the information processing computer, so that whether the PIN is qualified or not is judged, and the detection accuracy is improved. Manual detection can be replaced, whether the STN glass PIN is an OK product or not can be rapidly judged according to standard requirements, the product yield is improved, and the repair rate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of STN glass pin detection technology, and in particular to a device for detecting appearance defects of STN glass pins. Background Technology

[0002] STN glass typically refers to the glass substrate used in LCD displays. This type of display is widely used in industries such as electronics, machinery, and consumer goods. In the touch screen industry, in order to screen out STN glass that meets performance standards, the appearance defects of the STN glass pins are inspected and verified before the STN glass is bonded to the FPC. This requires manual inspection of each special pin. Due to the large number of STN glass pins that need to be verified, the testing and verification process is time-consuming and inefficient, which seriously affects the speed of product launch and delivery. Utility Model Content

[0003] Therefore, it is necessary to provide a device for detecting appearance defects of STN glass pins to address the aforementioned technical problems. This device involves placing the STN display screen on a pre-alignment vacuum adsorption platform, positioning the pins of the STN display screen on a flat panel light source, then illuminating the flat panel light source to allow an industrial camera to image the pins. Finally, algorithms and information processing computers are used to process and compare the images to determine whether the pins are qualified. This device can not only replace manual inspection but also quickly determine whether STN glass pins are OK products according to standard requirements, thereby improving product yield and reducing rework rate.

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

[0005] An apparatus for detecting appearance defects in STN glass pins, comprising:

[0006] The system includes a vacuum adsorption platform, a flat panel light source, a camera, and an information processing computer. The vacuum adsorption platform has a support surface and a detection surface. The flat panel light source is installed on the right side of the detection surface. A vacuum suction cup and a positioning post are installed on the upper surface of the support surface. The positioning post and the vacuum suction cup are used to position the STN display screen and position the pins on the flat panel light source. The camera is used to photograph the pins on the flat panel light source, and the information processing computer is used to judge the photographed pins.

[0007] Furthermore, the camera is an industrial camera.

[0008] Furthermore, the bearing surface and the detection surface form a 90-degree angle.

[0009] Furthermore, the vacuum adsorption platform includes a mounting plate and a vertical plate fixedly connected to the right side of the mounting plate. The upper surface of the mounting plate has multiple grooves, and the vacuum suction cup is installed inside the grooves. The top end of the vacuum suction cup protrudes from the upper surface of the mounting plate, and the other end of the vacuum suction cup is connected to an external vacuum pump. The bearing surface is located on the upper surface of the mounting plate, and the detection surface is located on the right side of the vertical plate.

[0010] Furthermore, there are multiple positioning posts, which are symmetrically installed on the front and rear sides of the upper surface of the mounting plate.

[0011] Furthermore, a soft pad, made of rubber, is fixedly connected to the outer surface of the positioning post.

[0012] Furthermore, the mounting plate has a mounting groove on its left side, and a movable plate is slidably connected inside the mounting groove. The upper surface of the mounting plate has multiple long grooves that communicate with the mounting groove. The positioning post is located inside the long groove and is fixedly connected to the movable plate. An adjustment component is provided on the left side of the mounting groove, and the adjustment component is used to move the movable plate left and right.

[0013] Furthermore, the adjustment assembly includes a cover plate and a lead screw rotatably connected to the cover plate. The right end of the lead screw is threadedly connected to a movable plate, and the left end of the lead screw is fixedly connected to a handle. The cover plate is fixedly connected to the left side of the mounting plate by a first screw.

[0014] Furthermore, it also includes a base plate, with the vertical plate fixedly connected to the left side of the upper surface of the base plate, and a mounting bracket fixedly connected to the right side of the upper surface of the base plate, with the camera mounted on the top of the mounting bracket.

[0015] Furthermore, a mounting hole is provided on the right side of the camera, and an elongated hole is provided at the top of the mounting bracket. A second screw is provided in the elongated hole and threaded into the mounting hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The device for detecting appearance defects of STN glass pins provided by this utility model has an adjustment component. When in use, turning the handle drives the lead screw to rotate. Since the lead screw is threadedly connected to the movable plate, the lead screw can drive the movable plate and the positioning post to move during the rotation until the STN display screen is placed on the bearing surface, so that the pins are positioned on the flat light source. This allows the distance between the positioning post and the flat light source to be adjusted, so that the bearing surface can be adapted to the detection of STN display screens of different sizes.

[0018] The device for detecting appearance defects of STN glass pins provided by this utility model places the STN display screen on a pre-alignment vacuum adsorption platform, so that the pin ends of the STN display screen are positioned on a flat panel light source. Then, the flat panel light source is turned on, and an industrial camera images the pins. Finally, the image is processed and compared using algorithms and information processing computers to determine whether the pins are qualified. This device can not only replace manual inspection, but also quickly determine whether STN glass pins are OK products according to standard requirements, thereby improving product yield and reducing rework rate. Attached Figure Description

[0019] Figure 1 Right view of the device for detecting appearance defects of STN glass pins provided by this utility model;

[0020] Figure 2 A front view schematic diagram of the device for detecting appearance defects of STN glass pins provided by this utility model;

[0021] Figure 3 A three-dimensional structural diagram of the vacuum adsorption platform of the device for detecting appearance defects of STN glass pins provided by this utility model;

[0022] Figure 4 The present invention provides a device for detecting appearance defects of STN glass pins. Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 A schematic diagram of the camera mounting structure for the device for detecting appearance defects of STN glass pins provided by this utility model.

[0024] The markings in the diagram are explained as follows:

[0025] 1. Vacuum adsorption platform; 2. Flat panel light source; 101. Bearing surface; 102. Detection surface; 103. Vacuum suction cup; 104. Positioning column; 105. Soft pad; 6. STN display screen; 7. Pin; 8. Camera; 9. Information processing computer; 3. Mounting plate; 4. Vertical plate; 5. Mounting slot; 501. Movable plate; 502. Long slot; 503. Adjustment component; 5031. Cover plate; 5032. Lead screw; 5033. Handle; 5034. First screw; 10. Base plate; 11. Mounting bracket; 12. Long hole; 13. Second screw; 801. Mounting hole. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0027] As described in the background section, existing STN glass pin testing requires manual inspection of each pin one by one. Due to the large number of STN glass pins that need to be verified, the testing and verification process is time-consuming and inefficient, which seriously affects the speed of product launch and delivery.

[0028] To address this technical problem, this invention provides a device for detecting appearance defects in STN glass pins. This device can be used to accurately detect defects such as the number of pins, missing lengths, gaps, and tilted connections. It can not only replace manual inspection but also quickly determine whether STN glass pins are OK products according to standard requirements, thereby improving product yield and reducing rework rate.

[0029] For details, please refer to Figure 1-5 The device for detecting appearance defects in STN glass pins specifically includes:

[0030] The vacuum adsorption platform 1 and the flat light source 2 are provided. The vacuum adsorption platform 1 has a bearing surface 101 and a detection surface 102. The flat light source 2 is installed on the right side of the detection surface 102. The upper surface of the bearing surface 101 is equipped with a vacuum suction cup 103 and a positioning post 104. The positioning post 104 and the vacuum suction cup 103 are used to position the STN display screen 6 and make the PIN pin 7 located on the flat light source 2.

[0031] Camera 8 and information processing computer 9 are used to take pictures of pin 7 on the flat panel light source 2, and information processing computer 9 is used to judge the pin 7 in the picture.

[0032] The device for detecting appearance defects of STN glass pins provided by this utility model places the STN display screen 6 on the pre-alignment vacuum adsorption platform 1, so that the pin 7 end of the STN display screen 6 is located on the flat panel light source 2. Then, the flat panel light source 2 is lit, so that the industrial camera 8 images the pin 7. Finally, the image is processed and compared by the algorithm and information processing computer 9 to determine whether the pin 7 is qualified. It can not only replace manual inspection, but also quickly determine whether the STN glass pins are OK products according to standard requirements, improve product yield, and reduce rework rate.

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] Please refer to Figure 1-3 An apparatus for detecting appearance defects of STN glass pins includes a vacuum adsorption platform 1 and a flat light source 2. The vacuum adsorption platform 1 has a bearing surface 101 and a detection surface 102. The flat light source 2 is installed on the right side of the detection surface 102. A vacuum suction cup 103 and a positioning post 104 are installed on the upper surface of the bearing surface 101. The positioning post 104 and the vacuum suction cup 103 are used to position the STN display screen 6 and place the pins 7 on the flat light source 2.

[0037] Camera 8 and information processing computer 9 are used to take pictures of pin 7 on the flat panel light source 2, and information processing computer 9 is used to judge the pin 7 in the picture.

[0038] The device for detecting appearance defects of STN glass pins provided in this embodiment places the STN display screen 6 on the pre-alignment vacuum adsorption platform 1, so that the pin 7 end of the STN display screen 6 is located on the flat panel light source 2. Then, the flat panel light source 2 is lit, so that the industrial camera 8 images the pin 7. Finally, the image is processed and compared by the algorithm and information processing computer 9 to determine whether the pin 7 is qualified. It can not only replace manual inspection, but also quickly determine whether the STN glass pins are OK products according to the standard requirements.

[0039] The apparatus for detecting appearance defects of STN glass pins provided in Example 1 is further optimized, specifically, as follows: Figure 2 As shown, camera 8 is an industrial camera, with a 90-degree angle between the bearing surface 101 and the detection surface 102.

[0040] Through the above structural design, when the industrial camera 8 images the PIN7, there is a high contrast with the flat panel light source 2, so that the image is not overexposed and the edges of the PIN7 are clear and not blurred.

[0041] The apparatus for detecting appearance defects of STN glass pins provided in Example 1 or 2 is further optimized, such as... Figure 3 and Figure 4As shown, the vacuum adsorption platform 1 includes a mounting plate 3 and a vertical plate 4 fixedly connected to the right side of the mounting plate 3. The upper surface of the mounting plate 3 has multiple grooves, and the vacuum suction cup 103 is installed inside the grooves. The top of the vacuum suction cup 103 protrudes from the upper surface of the mounting plate 3, and the other end of the vacuum suction cup 103 is connected to an external vacuum pump. The bearing surface 101 is located on the upper surface of the mounting plate 3, and the detection surface 102 is located on the right side of the vertical plate 4. In this way, when the STN display screen 6 is placed, it can directly contact the vacuum suction cup 103, which not only plays a buffering role, but also has a better adsorption effect.

[0042] There are multiple positioning posts 104, which are symmetrically installed on the front and rear sides of the upper surface of the mounting plate 3. A soft pad 105 is fixedly connected to the outer surface of the positioning post 104. The soft pad 105 is made of rubber. By setting the soft pad 105, the outer side of the positioning post 104 has a certain toughness, so as to avoid impact between the positioning post 104 and the STN display screen 6 when it is placed.

[0043] like Figure 4 As shown, a mounting groove 5 is provided on the left side of the mounting plate 3. A movable plate 501 is slidably connected inside the mounting groove 5. Multiple long grooves 502 communicating with the mounting groove 5 are provided on the upper surface of the mounting plate 3. The positioning post 104 is located inside the long groove 502 and is fixedly connected to the movable plate 501. An adjustment component 503 is provided on the left side of the mounting groove 5. The adjustment component 503 is used to move the movable plate 501 left and right. The adjustment component 503 includes a cover plate 5031 and a screw rod 5032 rotatably connected to the cover plate 5031. The right end of the screw rod 5032 is threadedly connected to the movable plate 501. A handle 5033 is fixedly connected to the left end of the screw rod 5032. The cover plate 5031 is fixedly connected to the left side of the mounting plate 3 by a first screw 5034.

[0044] By setting the adjustment component 503, when in use, turning the handle 5033 drives the lead screw 5032 to rotate. Since the lead screw 5032 is threadedly connected to the movable plate 501, the lead screw 5032 can drive the movable plate 501 and the positioning post 104 to move during the rotation until the STN display screen 6 is placed on the bearing surface 101, so that the PIN 7 is located on the flat light source 2, thereby adjusting the distance between the positioning post 104 and the flat light source 2, so that the bearing surface 101 can adapt to the detection of STN display screens 6 of different sizes.

[0045] The apparatus for detecting appearance defects of STN glass pins provided in the above embodiments is further optimized, such as... Figure 2 and Figure 5As shown, it also includes a base plate 10, a vertical plate 4 fixedly connected to the left side of the upper surface of the base plate 10, and a mounting bracket 11 fixedly connected to the right side of the upper surface of the base plate 10. The camera 8 is mounted on the top of the mounting bracket 11. A mounting hole 801 is provided on the right side of the camera 8. An elongated hole 12 is provided at the top of the mounting bracket 11. A second screw 13 is provided in the elongated hole 12 and threaded into the mounting hole 801. By setting the elongated hole 12 and the second screw 13, the height of the camera 8 can be adjusted, thereby ensuring that the PIN 7 for shooting is always in the center, so as to better process the image.

[0046] The device for detecting appearance defects of STN glass pins provided by this utility model is used as follows:

[0047] 1. By rotating the handle 5033, the lead screw 5032 is rotated. Since the lead screw 5032 is threadedly connected to the movable plate 501, the lead screw 5032 can drive the movable plate 501 and the positioning post 104 to move during the rotation until the STN display screen 6 is placed on the bearing surface 101, so that the PIN 7 is located on the flat panel light source 2, thus completing the adjustment of the positioning post 104.

[0048] 2. Place the STN display screen 6 on the pre-alignment vacuum adsorption platform 1, so that the PIN pin 7 of the STN display screen 6 is located on the flat panel light source 2;

[0049] 3. Turn on the flat panel light source 2, and adjust the focal length and aperture of the industrial camera 8 to make the pin 7 in the image of the industrial camera 8 have a high contrast with the flat panel light source 2, so that the image is not overexposed and the edges of the pin 7 are clear and not blurred.

[0050] 4. Denoise the acquired image and enhance the contrast of pin 7. Use a threshold segmentation algorithm to segment and extract the pin 7 region.

[0051] 5. Count the number of regions in the extracted and segmented PIN 7 area, use the edge extraction algorithm to determine the consistency of the length of PIN 7 and calculate the edge tilt angle, then calculate the distance between the edges of PIN 7 to determine the gap between PIN 7, and then use the dilation and erosion algorithm to determine whether there are missing PIN 7.

[0052] 6. Compare the calculated data with the standard parameters to determine whether pin 7 is qualified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A device for detecting appearance defects in STN glass pins, characterized in that, It includes: A vacuum adsorption platform (1) and a flat light source (2) are provided. The vacuum adsorption platform (1) has a bearing surface (101) and a detection surface (102). The flat light source (2) is installed on the right side of the detection surface (102). A vacuum suction cup (103) and a positioning post (104) are installed on the upper surface of the bearing surface (101). The positioning post (104) and the vacuum suction cup (103) are used to position the STN display screen (6) and place the PIN pin (7) on the flat light source (2). A camera (8) and an information processing computer (9) are provided. The camera (8) is used to take pictures of the pins (7) on the flat panel light source (2), and the information processing computer (9) is used to judge the pins (7) that are taken.

2. The apparatus for detecting appearance defects of STN glass pins according to claim 1, characterized in that, The camera (8) is an industrial camera.

3. The apparatus for detecting appearance defects of STN glass pins according to claim 1, characterized in that, The bearing surface (101) and the detection surface (102) are at a 90-degree angle.

4. The apparatus for detecting appearance defects of STN glass pins according to claim 1, characterized in that, The vacuum adsorption platform (1) includes a mounting plate (3) and a vertical plate (4) fixedly connected to the right side of the mounting plate (3). The upper surface of the mounting plate (3) is provided with multiple grooves. The vacuum suction cup (103) is installed inside the grooves. The top of the vacuum suction cup (103) protrudes from the upper surface of the mounting plate (3). The other end of the vacuum suction cup (103) is connected to an external vacuum pump. The bearing surface (101) is located on the upper surface of the mounting plate (3), and the detection surface (102) is located on the right side of the vertical plate (4).

5. The apparatus for detecting appearance defects of STN glass pins according to claim 4, characterized in that, The number of positioning posts (104) is multiple, and the multiple positioning posts (104) are symmetrically installed on the front and rear sides of the upper surface of the mounting plate (3).

6. The apparatus for detecting appearance defects of STN glass pins according to claim 5, characterized in that, A soft pad (105) is fixedly connected to the outer surface of the positioning post (104), and the soft pad (105) is made of rubber.

7. The apparatus for detecting appearance defects of STN glass pins according to claim 6, characterized in that, The mounting plate (3) has a mounting groove (5) on its left side. A movable plate (501) is slidably connected inside the mounting groove (5). The upper surface of the mounting plate (3) has multiple long grooves (502) that communicate with the mounting groove (5). The positioning post (104) is located inside the long groove (502) and is fixedly connected to the movable plate (501). An adjustment component (503) is provided on the left side of the mounting groove (5). The adjustment component (503) is used to move the movable plate (501) left and right.

8. The apparatus for detecting appearance defects of STN glass pins according to claim 7, characterized in that, The adjustment assembly (503) includes a cover plate (5031) and a lead screw (5032) rotatably connected to the cover plate (5031). The right end of the lead screw (5032) is threadedly connected to the movable plate (501), and the left end of the lead screw (5032) is fixedly connected to a handle (5033). The cover plate (5031) is fixedly connected to the left side of the mounting plate (3) by a first screw (5034).

9. The apparatus for detecting appearance defects of STN glass pins according to claim 4, characterized in that, It also includes a base plate (10), the vertical plate (4) is fixedly connected to the left side of the upper surface of the base plate (10), and a mounting bracket (11) is fixedly connected to the right side of the upper surface of the base plate (10). The camera (8) is mounted on the top of the mounting bracket (11).

10. The apparatus for detecting appearance defects of STN glass pins according to claim 9, characterized in that, The camera (8) has a mounting hole (801) on its right side, and the mounting bracket (11) has a long hole (12) at its top. A second screw (13) is provided in the long hole (12) and threaded into the mounting hole (801).

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