Pressure-sensitive adhesive linear defect detection device and method
The polarized aurora detection device detects and projectes the linear defects of the polarizing plate, which solves the problem that traditional detection methods are difficult to detect linear defects, and achieves efficient and accurate detection, reducing production losses and defect rates.
Patent Information
- Application Number
- CN202311739225.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2025-06-20
AI Technical Summary
Traditional reflector lamp detection methods are difficult to detect linear defects caused by pressure-sensitive adhesives in the manufacturing process of polarizers, resulting in abnormal leakage and quality risks.
The polarized aurora detection device is adopted to detect the detection sample through the polarized aurora formed by the polarized aurora device, and the linear defect is projected and imaged on the projection screen to realize visual detection of linear defects.
It effectively overcomes the problem that traditional detection methods are difficult to detect linear defects. It is simple to operate and can promptly detect problems, reduce production losses, improve work efficiency, and reduce defect rate.
Smart Images
Figure CN120177478A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of polarized light detection, and specifically to a device and method for detecting linear defects of pressure-sensitive adhesive. Background Art
[0002] The polarizer is an important component of a liquid crystal display device (LCD). Polarizers are widely used in televisions, computers, tablets, mobile phones, and vehicles to improve display quality. The finished polarizer is formed by laminating multiple layers of films, specifically composed of a release film, a pressure-sensitive adhesive, a lower TAC film, a PVA film, an upper TAC film, and a protective film.
[0003] During the manufacturing process of the polarizer, linear defects will occur in the pressure-sensitive adhesive coating process due to factors such as raw materials, process conditions, and the environment.
[0004] Currently, traditional reflection lamp detection methods are not easy to detect such linear defects, which may lead to abnormal leakage to the client, affecting the client's partial lamination effect, thus increasing the quality risk. Summary of the Invention
[0005] The purpose of the present invention is to provide a device and method for detecting linear defects of pressure-sensitive adhesive, which can overcome the problem that traditional reflection lamp detection methods are not easy to detect linear defects.
[0006] To achieve the above purpose, the present invention provides the following technical solutions: In the first aspect, the present invention provides a device for detecting linear defects of pressure-sensitive adhesive, including: A polarized light device (1): used to form polarized light (11) to detect a test sample (3); A projection screen (2): used to project and image the detected linear defects; Among them, the polarized light device (1) includes: A light source (4): used to emit white light (9); A 3LCD component (5): including a beam splitter (7) for decomposing the white light (9) emitted by the light source (4) into red, green, and blue primary color lights (10), and a liquid crystal panel (8) for making the red, green, and blue primary color lights (10) converge and form an image; A convex lens (6): used to converge the red, green, and blue primary color lights (10) decomposed by the 3LCD component (5) into polarized light (11).
[0007] Combined with the first aspect, further, the horizontal central axes of the light source (4), the beam splitter (7), the liquid crystal panel (8), the convex lens (6), and the projection screen (2) are on the same straight line.
[0008] In combination with the first aspect, further, the height of the polarized light device (1) from the ground is 60 to 80 cm.
[0009] In combination with the first aspect, further, the distance between the polarized light device (1) and the projection screen (2) is 100 to 120 cm.
[0010] In combination with the first aspect, further, the illuminance of the polarized light (11) is greater than 15000 LUX.
[0011] In combination with the first aspect, further, the projection screen (2) is a white screen.
[0012] In the second aspect, the present invention provides a method for detecting linear defects of pressure-sensitive adhesives, including: Place the adhesive surface of the test sample (3) facing the polarized light device (1) and perpendicular to the polarized light (11) at 90° between the polarized light device (1) and the projection screen (2), so that the absorption axis of the test sample (3) is parallel to the polarized light (11); Move the test sample (3) downward once by a preset distance from top to bottom. Along with the movement of the test sample (3), observe from left to right on the projection screen (2). If the projected image (12) of a linear defect is observed, mark the corresponding position on the test sample (3) until the test sample (3) has moved from top to bottom completely; According to the marks on the test sample (3), confirm the marked area under a reflection lamp. If it is confirmed that there are linear defects in the marked area, determine the defect risk of the test sample (3) according to the shape and degree presented by the linear defects.
[0013] In combination with the second aspect, further, the preset distance is 10 cm.
[0014] In combination with the second aspect, further, when the adhesive surface of the test sample (3) is placed facing the polarized light device (1) and perpendicular to the polarized light (11) at 90° between the polarized light device (1) and the projection screen (2), the distance between the test sample (3) and the polarized light device (1) is 50 to 70 cm.
[0015] In combination with the second aspect, further, the detection process is carried out in a dark room.
[0016] Compared with the prior art, the beneficial effects of the present invention are: The pressure-sensitive adhesive linear defect detection device and method provided by the present invention are based on the optical properties of a polarizing plate and use polarized light to detect linear defects generated during the production process of the pressure-sensitive adhesive. It can overcome the problem that traditional reflection lamp detection methods are not easy to detect linear defects, is easy to operate, and is easy to detect linear defects of test samples during the production process. The pressure-sensitive adhesive linear defect detection device and method provided by the present invention use polarized light to magnify and project the linear defects on the polarizing plate onto a screen, can discover problems in a timely manner, reduce production losses, improve work efficiency, effectively reduce the defective rate, monitor the production quality, and avoid abnormal leakage to the client. Description of the Drawings
[0017] Figure 1 It is a schematic diagram of the pressure-sensitive adhesive linear defect detection device provided by an embodiment of the present invention.
[0018] In the figure: 1 - Polarized light device; 2 - Projection screen; 3 - Test sample; 4 - Light source; 5 - 3LCD component; 6 - Convex lens; 7 - Beam splitter; 8 - Liquid crystal panel; 9 - White light; 10 - Red, green, and blue primary colors of light; 11 - Polarized light; 12 - Projection imaging of linear defects; R - Red light; G - Green light; B - Blue light. Detailed Embodiments
[0019] The technical solutions of the present application will be further described in detail below in conjunction with the specific embodiments.
[0020] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application. Without conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.
[0021] Embodiment 1: This embodiment provides a pressure-sensitive adhesive linear defect detection device, as Figure 1 shown, including a polarized light device 1 for forming polarized light 11 to detect the test sample 3 and a projection screen 2 for projecting and imaging the detected linear defects.
[0022] In this embodiment, as Figure 1 shown, the polarized light device 1 includes a light source 4, a 3LCD component 5, and a convex lens 6. The light source 4 is a bulb for emitting white light 9. The 3LCD component 5 includes a beam splitter 7 for decomposing the white light 9 emitted by the light source 4 into red, green, and blue primary colors of light 10 and a liquid crystal panel 8 for converging and imaging the red, green, and blue primary colors of light 10. As Figure 1As shown in the figure, the liquid crystal panel 8 includes a liquid crystal panel corresponding to red light R, a liquid crystal panel corresponding to green light G, and a liquid crystal panel corresponding to blue light B. The red light R, green light G, and blue light B respectively pass through their corresponding liquid crystal panels for imaging. The convex lens 6 is used to converge the red, green, and blue primary color lights 10 decomposed by the 3LCD module 5 into polarized light 11.
[0023] The white light 9 emitted by the light source 4 is decomposed into red, green, and blue primary color lights 10 by the 3LCD module 5 and then converged into polarized light 11 by the convex lens 6. The test sample 3 is placed between the polarizing light device 1 and the projection screen 2. Based on the optical properties of the polarizing plate, the polarized light 11 passes through the test sample 3 to perform linear defect detection on the test sample 3. If there are linear defects in the test sample 3, the projected image 12 of the linear defects can be observed on the projection screen 2.
[0024] In this embodiment, the horizontal central axes of the light source 4, the beam splitter 7, the liquid crystal panel 8, the convex lens 6, and the projection screen 2 are set on the same straight line. The height of the polarizing light device 1 from the ground is set to 60 - 80 cm. The distance between the polarizing light device 1 and the projection screen 2 is set to 100 - 120 cm. The illuminance of the polarized light 11 is set to be greater than 15000 LUX. The projection screen 2 is set as a white screen.
[0025] When the test sample 3 is placed between the polarizing light device 1 and the projection screen 2, the distance between the test sample 3 and the polarizing light device 1 is set to 50 - 70 cm, ensuring that the adhesive surface of the test sample 3 faces the polarizing light device 1 and is perpendicular to the polarized light 11 at 90°, so that the absorption axis of the test sample 3 is parallel to the polarized light 11.
[0026] The pressure - sensitive adhesive linear defect detection device provided in this embodiment, based on the optical properties of the polarizing plate, uses polarized light to detect the linear defects generated in the production process of the pressure - sensitive adhesive, can overcome the problem that it is difficult to detect linear defects by the traditional reflection lamp detection method, is easy to operate, and is easy to perform linear defect detection on the test sample during the production process.
[0027] Embodiment 2: This embodiment provides a method for detecting linear defects of a pressure - sensitive adhesive, which specifically includes the following steps: Step 1: Place the test sample 3 with its adhesive surface facing the polarizing light device 1 and perpendicular to the polarized light 11 at 90° between the polarizing light device 1 and the projection screen 2, so that the absorption axis of the test sample 3 is parallel to the polarized light 11; In this embodiment, when the test sample 3 is placed with its adhesive surface facing the polarizing light device 1 and perpendicular to the polarized light 11 at 90° between the polarizing light device 1 and the projection screen 2, the distance between the test sample 3 and the polarizing light device 1 is 50 - 70 cm.
[0028] The detection process is carried out in a darkroom.
[0029] Step 2: Move the detection sample 3 downward in a single pass by a preset distance. Along with the movement of the detection sample 3, observe from left to right on the projection screen 2. If the projected image 12 of a linear defect is observed, mark the corresponding position on the detection sample 3 until the detection sample 3 has completed its downward movement. In this embodiment, the preset distance is 10 cm. Slowly move the detection sample 3 downward, stop after each 10-cm movement. Along with the movement of the detection sample 3, carefully observe from left to right on the projection screen 2 whether there is a projected image 12 of a linear defect. If the projected image 12 of a linear defect, i.e., a black shadow, is observed, immediately use a MARK pen to mark the corresponding position on the detection sample 3, and then continue to slowly move the detection sample 3 downward by 10 cm. Observe whether there is a projected image 12 of a linear defect during each movement segment on the projection screen 2. For each observed projected image 12 of a linear defect, mark the corresponding position on the detection sample 3 until the detection sample 3 has completed its entire downward movement.
[0030] Step 3: According to the marks on the detection sample 3, confirm the marked area under a reflection lamp. If it is confirmed that there is a linear defect in the marked area, determine the defect risk of the detection sample 3 based on the shape and degree of the linear defect.
[0031] In this embodiment, according to the marks on the detection sample 3, use a reflection lamp to confirm whether there is a linear defect in the marked area. If it is confirmed that there is a linear defect in the marked area, determine the defect risk of the detection sample 3 based on the shape and degree of the linear defect, so as to screen out the detection samples 3 with high defect risk, reduce the defective rate of the product, monitor the production quality, and prevent abnormal leakage to the client.
[0032] The method for detecting linear defects of the pressure-sensitive adhesive provided in this embodiment is based on the optical properties of a polarizing plate, and uses polarized light to detect linear defects generated during the production process of the pressure-sensitive adhesive. It can overcome the problem that traditional reflection lamp detection methods are not easy to detect linear defects, is simple to operate, and is easy to detect linear defects of detection samples during the production process. Using polarized light to magnify and project the linear defects on the polarizing plate onto the screen can timely discover problems, reduce production losses, and improve work efficiency. Using a reflection lamp to perform a secondary confirmation on the marked area can improve the accuracy of detection, avoid misjudgment, and further determine the defect risk of the detection sample based on the shape and degree of the linear defect.
[0033] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.
Claims
1. A pressure - sensitive adhesive linear defect detection device, characterized in that, Comprising: Polarized light device (1): Used to form polarized light (11) for detecting a detection sample (3); Projection screen (2): Used to project and image the detected linear defects; Wherein, the polarized light device (1) comprises: Light source (4): Used to emit white light (9); 3LCD component (5): Comprising a beam splitter (7) for decomposing the white light (9) emitted by the light source (4) into red, green, and blue primary color lights (10), and a liquid crystal panel (8) for aggregating and imaging the red, green, and blue primary color lights (10); Convex lens (6): Used to aggregate the red, green, and blue primary color lights (10) decomposed by the 3LCD component (5) into polarized light (11).
2. The pressure - sensitive adhesive linear defect detection device according to claim 1, characterized in that, The horizontal central axes of the light source (4), beam splitter (7), liquid crystal panel (8), convex lens (6), and projection screen (2) are on the same straight line.
3. The pressure - sensitive adhesive linear defect detection device according to claim 1, characterized in that, The height of the polarized light device (1) from the ground is 60 - 80 cm.
4. The pressure - sensitive adhesive linear defect detection device according to claim 1, characterized in that, The distance between the polarized light device (1) and the projection screen (2) is 100 - 120 cm.
5. The pressure - sensitive adhesive linear defect detection device according to claim 1, characterized in that, The illuminance of the polarized light (11) is greater than 15000 LUX.
6. The pressure - sensitive adhesive linear defect detection device according to claim 1, characterized in that, The projection screen (2) is a white screen.
7. A pressure - sensitive adhesive linear defect detection method for the device according to any one of claims 1 - 6, characterized in that, Comprising: Place the adhesive surface of the detection sample (3) facing the polarized light device (1) and perpendicular to the polarized light (11) at 90° between the polarized light device (1) and the projection screen (2), so that the absorption axis of the detection sample (3) is parallel to the polarized light (11); Move the detection sample (3) downward once from top to bottom by a preset distance. Along with the movement of the detection sample (3), observe from left to right on the projection screen (2). If a projected image (12) of a linear defect is observed, mark the corresponding position on the detection sample (3) until the detection sample (3) has moved from top to bottom completely; According to the marks on the detection sample (3), confirm the marked area under a reflection lamp. If it is confirmed that there are linear defects in the marked area, determine the defect risk of the detection sample (3) according to the form and degree presented by the linear defects.
8. The pressure - sensitive adhesive linear defect detection method according to claim 7, characterized in that, The preset distance is 10 cm.
9. The pressure - sensitive adhesive linear defect detection method according to claim 7, characterized in that, When the adhesive surface of the detection sample (3) is facing the polarized light device (1) and perpendicular to the polarized light (11) at 90° between the polarized light device (1) and the projection screen (2), the distance between the detection sample (3) and the polarized light device (1) is 50 - 70 cm.
10. The pressure - sensitive adhesive linear defect detection method according to claim 7, characterized in that, The detection process is carried out in a darkroom.