A method and system for intelligent control of light guide plate production based on information collaboration

Abstract

This invention discloses an intelligent control method and system for light guide plate production based on information collaboration, relating to the field of light guide plate production technology. The method includes acquiring information on the light guide plate substrate material, obtaining light guide plate forming process parameters, and, based on these parameters, acquiring light guide plate processing technology information according to the substrate material information. This invention obtains a light guide plate forming process quality index by analyzing the pass rate, process coefficient, and transmittance corresponding to each forming process. This index is used to screen light guide plate forming processes, improving production efficiency and ensuring the stability and reliability of the light guide plates. Furthermore, by dividing the basic light guide plate into regions, basic light guide plate row area information is obtained. This information is then used to inspect the quality of the light guide plates, improving inspection efficiency while ensuring accuracy.

Description

Technical Field

[0001] This invention relates to the field of light guide plate manufacturing technology, specifically to an intelligent control method and system for light guide plate manufacturing based on information collaboration. Background Technology

[0002] Most electronic devices currently use flat panel displays (FPS) for image display, with liquid crystal displays (LCDs) being the most mature and widely used technology. However, since the LCD panel itself cannot emit light, a backlight assembly is needed beneath it to provide the necessary illumination for the displayed image. Backlight assemblies can be mainly divided into edge-lit backlight assemblies and direct-lit backlight assemblies. Edge-lit backlight assemblies utilize a light guide plate to direct light emitted from a light source positioned on the light-incident side of the light guide plate to the light-emitting surface, thereby forming a surface light source. Therefore, the quality of the light guide plate directly affects the image display effect.

[0003] Currently, the production control of light guide plates faces challenges such as the inability to accurately assess the material properties of the light guide plates, the inability to select suitable processing techniques, and the inability to accurately test the light guide plates. Often, the brightness of the light guide plate is directly measured by the area brightness, but the area brightness of the light guide plate is directly related to the dot matrix. Using the area brightness of the light guide plate as the testing standard cannot accurately determine the specific brightness center, and it is impossible to accurately assess the quality of the light guide plate. If every dot matrix is ​​tested, not only will the testing cost increase, but the testing efficiency will also be greatly affected. Summary of the Invention

[0004] To address the aforementioned technical problems, this paper provides an intelligent control method and system for light guide plate production based on information collaboration. This technical solution solves the problems mentioned in the background art, such as the inability to accurately assess the material properties of light guide plates, the inability to select suitable processing technology, and the inability to accurately inspect light guide plates. Often, the brightness of a region of the light guide plate is directly measured, but the brightness of a region of the light guide plate is directly related to the dot matrix. Using the brightness of a region of the light guide plate as the inspection standard cannot accurately determine the specific brightness center, and it is impossible to accurately assess the quality of the light guide plate. If every dot matrix is ​​inspected, not only will the inspection cost increase, but the inspection efficiency will also be greatly affected.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for intelligent control of light guide plate production based on information collaboration, comprising:

[0007] Obtain information on the substrate material of the light guide plate, including substrate material type information and substrate material parameter information;

[0008] Based on the light guide plate forming process, the light guide plate forming process parameters are obtained. The light guide plate forming process includes injection molding, compression, and hot pressing.

[0009] Based on the light guide plate forming process parameters, and according to the light guide plate substrate material information, the light guide plate processing technology information is obtained.

[0010] Based on the light guide plate processing technology information, the light guide plate substrate material is shaped to obtain the basic light guide plate;

[0011] Based on the basic light guide plate, obtain the dot location information and light incident side information of the light guide plate;

[0012] The thickness of the basic light guide plate is measured to obtain the maximum and minimum thickness of the light guide plate.

[0013] Based on the maximum thickness of the light guide plate, the minimum thickness of the light guide plate, and the information of the light incident side, the basic light guide plate is divided into regions to obtain the row region information of the basic light guide plate.

[0014] Based on the dot location information of the light guide plate and the row area information of the basic light guide plate, determine whether the basic light guide plate is qualified. If not, adjust the light guide plate according to the row area information of the basic light guide plate. If yes, the basic light guide plate is qualified.

[0015] Preferably, the step of obtaining light guide plate processing information based on the light guide plate molding process parameters and the light guide plate substrate material information specifically includes:

[0016] Based on the light guide plate forming process parameters, obtain the light transmittance and material limit light transmittance corresponding to each light guide plate forming process;

[0017] Obtain historical production data of light guide plates, which includes historical data of light guide plates corresponding to each light guide plate forming process;

[0018] Based on historical production data of light guide plates, obtain the pass rate and cost information corresponding to each light guide plate molding process;

[0019] The proportion of cost information corresponding to each light guide plate forming process is used as the process coefficient of that light guide plate forming process;

[0020] Based on the pass rate information, process coefficient and light transmittance corresponding to each light guide plate forming process, the quality index of the light guide plate forming process is obtained;

[0021] The light guide plate forming process with the highest quality index is taken as the light guide plate processing process, and information on the light guide plate processing process is obtained.

[0022] The formula for calculating the quality index of the light guide plate molding process is as follows:

[0023]

[0024] In the formula, Let x be the quality index of the light guide plate forming process for the xth light guide plate forming process. This represents the light transmittance of the x-th light guide plate forming process. This represents the pass rate of the xth light guide plate forming process. This represents the process coefficient for the x-th light guide plate forming process. This indicates the material's maximum light transmittance.

[0025] Preferably, obtaining the light transmittance and material limit light transmittance corresponding to each light guide plate forming process based on the light guide plate forming process parameters specifically includes:

[0026] Based on the material information of the light guide plate substrate, the material characteristic temperature information is obtained, including the Vicat softening temperature and the heat distortion temperature.

[0027] Based on the requirements of the light guide plate molding process parameters, the Vicat softening temperature is used as the hot pressing process temperature, and the heat distortion temperature is used as the injection molding process temperature.

[0028] Based on the substrate material parameter information in the light guide plate substrate material information, obtain the temperature change curve of the substrate material transmittance;

[0029] Based on the hot pressing process temperature and the injection molding process temperature, the transmittance of the hot pressing process and the transmittance of the injection molding process are obtained according to the transmittance temperature change curve of the substrate material.

[0030] Based on the information about the light guide plate substrate material, obtain the light transmittance and the material's limiting light transmittance of the substrate material;

[0031] The light transmittance of the substrate material is used as the light transmittance of the compression process.

[0032] Based on the light transmittance of the hot pressing process, the light transmittance of the injection molding process, and the light transmittance of the compression process, the light transmittance corresponding to each light guide plate forming process is obtained.

[0033] Preferably, the step of forming the light guide plate substrate material based on the light guide plate processing technology information to obtain the basic light guide plate specifically includes:

[0034] Based on the light guide plate processing technology information, obtain the light guide plate processing parameters;

[0035] The light guide plate substrate material is shaped based on the light guide plate processing parameters to obtain the basic light guide plate;

[0036] If the light guide plate is processed by injection molding, the light guide plate substrate material is injection molded at the injection molding temperature to obtain the light guide plate substrate.

[0037] If the light guide plate is processed by compression, the light guide plate substrate material is compressed and molded to obtain the light guide plate substrate.

[0038] Based on the dot matrix processing technology, the light guide plate substrate is processed to obtain the basic light guide plate;

[0039] If the light guide plate is manufactured using a hot pressing process, the substrate material of the light guide plate is hot-pressed at the hot pressing process temperature to obtain the basic light guide plate.

[0040] Preferably, the step of dividing the basic light guide plate into regions based on the maximum thickness, minimum thickness, and incident light side information to obtain the basic light guide plate row region information specifically includes:

[0041] Based on the light guide plate detection requirements, obtain the threshold width of the light guide plate row area;

[0042] Using the light-incident side as the bottom edge, obtain the width value of the basic light guide plate;

[0043] The initial width of the light guide plate row area is obtained based on the basic light guide plate width value and the light guide plate row area width threshold.

[0044] Based on the light guide plate production standards, obtain the standard thickness of the light guide plate;

[0045] The thickness deviation coefficient of the light guide plate is obtained based on the maximum thickness, minimum thickness, and standard thickness of the light guide plate.

[0046] The width of the light guide plate row area is obtained based on the initial width of the light guide plate row area and the thickness deviation coefficient of the light guide plate.

[0047] Using the light-incident side as the initial boundary of the row area, and using the width of the row area of ​​the light guide plate as the reference, the basic light guide plate is divided into areas to obtain the row area information of the basic light guide plate.

[0048] Specifically, the initial width of the light guide plate row area is:

[0049]

[0050] In the formula, This indicates the initial width of the light guide plate row area. This represents the width of the basic light guide plate, where n is a constant. Let n gradually increase until... ;

[0051] The width of the light guide plate row area is specifically:

[0052]

[0053] In the formula, D is the width of the light guide plate row area. This is the thickness deviation coefficient of the light guide plate. This is the minimum thickness of the light guide plate. This is the maximum thickness of the light guide plate. This refers to the standard thickness of the light guide plate.

[0054] Preferably, the step of determining whether the basic light guide plate is qualified based on the dot location information of the light guide plate and the row area information of the basic light guide plate specifically includes:

[0055] Based on the dot location information of the light guide plate and the area information of the basic light guide plate row, obtain the dot location information within each basic light guide plate row area;

[0056] Using the light-incident side as the bottom edge, obtain the length value of the basic light guide plate, that is, the length of the row area of ​​the basic light guide plate;

[0057] Based on the dot location information, the length value, and the width value of the basic light guide plate within each basic light guide plate row area, obtain the dot density information of the basic light guide plate row area;

[0058] Based on the dot density information of the basic light guide plate row area, the model is fitted based on the dot processing technology to obtain the dot density model;

[0059] Based on the dot density model, obtain the standard dot density corresponding to each basic light guide plate row area;

[0060] Based on the dot density information of the basic light guide plate row area, obtain the difference between the dot density of each basic light guide plate row area and the standard dot density;

[0061] The area of ​​the basic light guide plate with the largest difference between the dot density and the standard dot density is taken as the first feature area, and the area of ​​the basic light guide plate with the smallest difference between the dot density and the standard dot density is taken as the second feature area.

[0062] Based on the first feature region, the sum of the positional distances between each point in the first feature region and the other points is taken as the concentration coefficient of the point, and the point with the largest concentration coefficient is taken as the first feature point.

[0063] Based on the second feature region, the sum of the positional distances between each point in the second feature region and the other points is taken as the concentration coefficient of that point, and the point with the largest concentration coefficient is taken as the second feature point.

[0064] Using the incident light side as a reference, light guiding tests are performed on the first and second feature dots to obtain the brightness of the first and second feature dots.

[0065] Based on the standard for brightness difference of light guide plates, the maximum brightness difference value of light guide plates is obtained.

[0066] The difference between the brightness of the first and second feature dots is compared with the maximum brightness difference value of the light guide plate. If the difference between the brightness of the first and second feature dots exceeds the maximum brightness difference value of the light guide plate, the basic light guide plate is unqualified. The dots are adjusted according to the difference between the brightness of the first and second feature dots. If the difference between the brightness of the first and second feature dots does not exceed the maximum brightness difference value of the light guide plate, the basic light guide plate is qualified.

[0067] Furthermore, an intelligent control system for light guide plate production based on information collaboration is proposed to implement the control methods described above, including:

[0068] The main control module is used to perform light guiding tests on the first and second feature dots with the light incident side as a reference, obtain the brightness of the first and second feature dots, compare the difference between the brightness of the first and second feature dots with the maximum brightness difference value of the light guide plate to determine whether the basic light guide plate is qualified, divide the basic light guide plate into regions according to the maximum thickness, minimum thickness and light incident side information of the light guide plate, obtain the row region information of the basic light guide plate, obtain the maximum brightness difference value of the light guide plate based on the brightness difference standard of the light guide plate, and adjust the dots according to the difference between the brightness of the first and second feature dots.

[0069] The information acquisition module is used to acquire information on the substrate material of the light guide plate, the type of substrate material, and the parameter information of the substrate material. Based on the light guide plate forming process, it acquires the forming process parameters of the light guide plate, acquires historical production data of the light guide plate, acquires the pass rate information and cost information corresponding to each forming process of the light guide plate based on the historical production data, acquires the dot position information and light incident side information of the light guide plate based on the basic light guide plate, detects the thickness of the basic light guide plate, acquires the maximum thickness and minimum thickness of the light guide plate, and acquires the material characteristic temperature information based on the substrate material information of the light guide plate.

[0070] The evaluation module is used to obtain the quality index of the light guide plate forming process based on the pass rate information, process coefficient and transmittance corresponding to each light guide plate forming process. The light guide plate forming process with the highest quality index is taken as the light guide plate processing process. The light guide plate processing process information is obtained. Based on the dot density information of the basic light guide plate row area, the model is fitted based on the dot processing process to obtain the dot density model. Based on the dot density model, the standard dot density corresponding to each basic light guide plate row area is obtained. Based on the dot density information of the basic light guide plate row area, the difference between the dot density of each basic light guide plate row area and the standard dot density is obtained.

[0071] The display module interacts with the main control module and is used to output and display the light guide plate processing technology information, light guide plate dot position information, light incident side information, basic light guide plate row area information, and dot density model.

[0072] Optionally, the main control module specifically includes:

[0073] The control unit is used to divide the basic light guide plate into regions based on the maximum thickness of the light guide plate, the minimum thickness of the light guide plate, and the incident light side information, obtain the basic light guide plate row region information, obtain the maximum brightness difference value of the light guide plate based on the brightness difference standard of the light guide plate, and adjust the dots according to the difference between the brightness of the first feature dot and the brightness of the second feature dot.

[0074] An information receiving unit interacts with the information acquisition module and the evaluation module to receive data and transmit it to the judgment unit.

[0075] The judgment unit is used to perform light guiding tests on the first feature dot and the second feature dot with the light incident side as a reference, obtain the brightness of the first feature dot and the brightness of the second feature dot, compare the difference between the brightness of the first feature dot and the brightness of the second feature dot with the maximum brightness difference value of the light guide plate, and determine whether the basic light guide plate is qualified.

[0076] Optionally, the information acquisition module specifically includes:

[0077] The first acquisition unit is used to acquire information on the substrate material of the light guide plate, information on the type of substrate material, and information on the substrate material parameters. Based on the light guide plate forming process, it acquires the light guide plate forming process parameters, acquires historical production data of the light guide plate, and acquires the pass rate information and cost information corresponding to each light guide plate forming process based on the historical production data of the light guide plate.

[0078] The second acquisition unit is used to acquire dot position information and incident light side information of the light guide plate based on the base light guide plate, detect the thickness of the base light guide plate, acquire the maximum thickness and minimum thickness of the light guide plate, and acquire material characteristic temperature information based on the substrate material information of the light guide plate.

[0079] Optionally, the evaluation module specifically includes:

[0080] The first evaluation unit is used to obtain the quality index of the light guide plate forming process based on the pass rate information, process coefficient and light transmittance corresponding to each light guide plate forming process, and to take the light guide plate forming process with the largest quality index as the light guide plate processing process, and to obtain the light guide plate processing process information.

[0081] The second evaluation unit is used to fit the model based on the dot density information of the basic light guide plate row area and the dot processing technology to obtain the dot density model. Based on the dot density model, the standard dot density corresponding to each basic light guide plate row area is obtained. Based on the dot density information of the basic light guide plate row area, the difference between the dot density of each basic light guide plate row area and the standard dot density is obtained.

[0082] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0083] This invention proposes an intelligent control method and system for light guide plate production based on information collaboration. By obtaining the pass rate information, process coefficient, and light transmittance corresponding to each light guide plate forming process, a light guide plate forming process quality index is obtained. The light guide plate forming process quality index is used to screen light guide plate forming processes, thereby improving the production efficiency of light guide plates and ensuring the stability and reliability of light guide plates. By dividing the basic light guide plate into regions, basic light guide plate row area information is obtained. The quality of the light guide plate is detected using the basic light guide plate row area information, which improves the detection efficiency while ensuring detection accuracy. Attached Figure Description

[0084] Figure 1 This is a flowchart of an intelligent control method for light guide plate production based on information collaboration proposed in this invention.

[0085] Figure 2 This is a flowchart of the light guide plate processing technology information acquisition process in this invention;

[0086] Figure 3 This is a flowchart illustrating the process of obtaining basic light guide plate row area information in this invention.

[0087] Figure 4 This is a flowchart illustrating the process of obtaining the brightness of the first and second feature dots in this invention.

[0088] Figure 5 This is a structural block diagram of an intelligent control system for light guide plate production based on information collaboration proposed in this invention. Detailed Implementation

[0089] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0090] Reference Figure 1 - Figure 4 As shown in the figure, an intelligent control method for light guide plate production based on information collaboration in an embodiment of the present invention includes:

[0091] Obtain information on the substrate material of the light guide plate, including substrate material type information and substrate material parameter information;

[0092] Based on the light guide plate forming process, the light guide plate forming process parameters are obtained. The light guide plate forming process includes injection molding, compression, and hot pressing.

[0093] Based on the light guide plate forming process parameters, and according to the light guide plate substrate material information, the light guide plate processing technology information is obtained.

[0094] Specifically, based on the light guide plate forming process parameters, and according to the light guide plate substrate material information, the light guide plate processing technology information is obtained, including:

[0095] Based on the light guide plate forming process parameters, obtain the light transmittance and material limit light transmittance corresponding to each light guide plate forming process;

[0096] Obtain historical production data of light guide plates, which includes historical data of light guide plates corresponding to each light guide plate forming process;

[0097] Based on historical production data of light guide plates, obtain the pass rate and cost information corresponding to each light guide plate molding process;

[0098] The proportion of cost information corresponding to each light guide plate forming process is used as the process coefficient of that light guide plate forming process;

[0099] Based on the pass rate information, process coefficient and light transmittance corresponding to each light guide plate forming process, the quality index of the light guide plate forming process is obtained;

[0100] The light guide plate forming process with the highest quality index is taken as the light guide plate processing process, and information on the light guide plate processing process is obtained.

[0101] The formula for calculating the quality index of the light guide plate molding process is as follows:

[0102]

[0103] In the formula, Let x be the quality index of the light guide plate forming process for the xth light guide plate forming process. This represents the light transmittance of the x-th light guide plate forming process. This represents the pass rate of the xth light guide plate forming process. This represents the process coefficient for the x-th light guide plate forming process. This indicates the material's maximum light transmittance.

[0104] Specifically, based on the light guide plate forming process parameters, the light transmittance and material limit light transmittance corresponding to each light guide plate forming process are obtained, including:

[0105] Based on the material information of the light guide plate substrate, the material characteristic temperature information is obtained, including the Vicat softening temperature and the heat distortion temperature.

[0106] Based on the requirements of the light guide plate molding process parameters, the Vicat softening temperature is used as the hot pressing process temperature, and the heat distortion temperature is used as the injection molding process temperature.

[0107] Based on the substrate material parameter information in the light guide plate substrate material information, obtain the temperature change curve of the substrate material transmittance;

[0108] Based on the hot pressing process temperature and the injection molding process temperature, the transmittance of the hot pressing process and the transmittance of the injection molding process are obtained according to the transmittance temperature change curve of the substrate material.

[0109] Based on the information about the light guide plate substrate material, obtain the light transmittance and the material's limiting light transmittance of the substrate material;

[0110] The light transmittance of the substrate material is used as the light transmittance of the compression process.

[0111] Based on the light transmittance of the hot pressing process, the light transmittance of the injection molding process, and the light transmittance of the compression process, the light transmittance corresponding to each light guide plate forming process is obtained.

[0112] In this solution, historical production data of light guide plates are used to obtain the pass rate and cost information corresponding to each light guide plate forming process. The proportion of the cost information corresponding to each light guide plate forming process is used as the process coefficient of that light guide plate forming process. Based on the pass rate information, process coefficient and light transmittance corresponding to each light guide plate forming process, the quality index of the light guide plate forming process is obtained. The light guide plate forming process with the highest quality index is used as the light guide plate processing process, and the light guide plate processing process information is obtained. This improves the production efficiency of light guide plates and ensures the stability and reliability of light guide plate quality.

[0113] Understandably, light transmittance is one of the key performance indicators of a light guide plate, directly affecting its optical performance. By obtaining the light transmittance corresponding to each light guide plate molding process (hot pressing, injection molding, compression molding), and combining it with the material's ultimate light transmittance, we can intuitively compare the impact of different processes on the light guide plate's light transmittance performance. This helps to produce light guide plates with superior optical performance, meeting the high-quality requirements of products in lighting, display, and other application scenarios.

[0114] Based on the light guide plate processing technology information, the light guide plate substrate material is shaped to obtain the basic light guide plate;

[0115] Specifically, based on the light guide plate processing technology information, the light guide plate substrate material is shaped to obtain a basic light guide plate, which includes:

[0116] Based on the light guide plate processing technology information, obtain the light guide plate processing parameters;

[0117] The light guide plate substrate material is shaped based on the light guide plate processing parameters to obtain the basic light guide plate;

[0118] If the light guide plate is processed by injection molding, the light guide plate substrate material is injection molded at the injection molding temperature to obtain the light guide plate substrate.

[0119] If the light guide plate is processed by compression, the light guide plate substrate material is compressed and molded to obtain the light guide plate substrate.

[0120] Based on the dot matrix processing technology, the light guide plate substrate is processed to obtain the basic light guide plate;

[0121] If the light guide plate is manufactured using a hot pressing process, the substrate material of the light guide plate is hot-pressed at the hot pressing process temperature to obtain the basic light guide plate.

[0122] In this solution, processing parameters for the light guide plate are obtained through the processing technology information. Based on these parameters, the substrate material is shaped to obtain a basic light guide plate. Thermopressing involves creating microstructures (such as dots) on a roller, then heating the roller. While the substrate material is being thermally compressed, the dots on the roller are simultaneously transferred to both sides of the substrate, directly forming a complete light guide plate without the need for separate dot structure processing. Thermopressed light guide plates are suitable for products with larger dimensions and ultra-thin requirements (such as laptops). Furthermore, the front light guide plates used in EPDs and reflective RLCDs are primarily thermopressed. However, for light guide plates formed by injection molding or compression processes, further dot processing (such as etching, laser dotting, mechanical dotting, screen printing, and hot rolling) is required.

[0123] Based on the basic light guide plate, obtain the dot location information and light incident side information of the light guide plate;

[0124] The thickness of the basic light guide plate is measured to obtain the maximum and minimum thickness of the light guide plate.

[0125] Based on the maximum thickness of the light guide plate, the minimum thickness of the light guide plate, and the information of the light incident side, the basic light guide plate is divided into regions to obtain the row region information of the basic light guide plate.

[0126] Specifically, based on the maximum thickness and minimum thickness of the light guide plate, as well as the information on the light incident side, the basic light guide plate is divided into regions to obtain the row region information of the basic light guide plate, including:

[0127] Based on the light guide plate detection requirements, obtain the threshold width of the light guide plate row area;

[0128] Using the light-incident side as the bottom edge, obtain the width value of the basic light guide plate;

[0129] The initial width of the light guide plate row area is obtained based on the basic light guide plate width value and the light guide plate row area width threshold.

[0130] Based on the light guide plate production standards, obtain the standard thickness of the light guide plate;

[0131] The thickness deviation coefficient of the light guide plate is obtained based on the maximum thickness, minimum thickness, and standard thickness of the light guide plate.

[0132] The width of the light guide plate row area is obtained based on the initial width of the light guide plate row area and the thickness deviation coefficient of the light guide plate.

[0133] Using the light-incident side as the initial boundary of the row area, and using the width of the row area of ​​the light guide plate as the reference, the basic light guide plate is divided into areas to obtain the row area information of the basic light guide plate.

[0134] Specifically, the initial width of the light guide plate row area is:

[0135]

[0136] In the formula, This indicates the initial width of the light guide plate row area. This represents the width of the basic light guide plate, where n is a constant. Let n gradually increase until... ;

[0137] The width of the light guide plate row area is specifically:

[0138]

[0139] In the formula, D is the width of the light guide plate row area. This is the thickness deviation coefficient of the light guide plate. This is the minimum thickness of the light guide plate. This is the maximum thickness of the light guide plate. This refers to the standard thickness of the light guide plate.

[0140] In this solution, the initial width of the light guide plate row area is determined by obtaining the threshold width of the light guide plate row area and the basic width value of the light guide plate. This provides an initial basis for subsequent area division, making the division quantifiable and ensuring its accuracy and consistency. This helps improve precision control during the production process. The light guide plate thickness deviation coefficient is calculated based on the maximum, minimum, and standard thickness of the light guide plate, fully considering the impact of thickness variations on area division. Excessive thickness deviation can affect the optical performance of the light guide plate. Therefore, the light guide plate thickness deviation coefficient is used to adjust the row area width; the larger the deviation, the smaller the row area width, i.e., the greater the detection accuracy, ensuring the stability of the light guide plate quality.

[0141] Based on the dot location information of the light guide plate and the row area information of the basic light guide plate, determine whether the basic light guide plate is qualified. If not, adjust the light guide plate according to the row area information of the basic light guide plate. If yes, the basic light guide plate is qualified.

[0142] Specifically, the qualification of the basic light guide plate is determined based on the dot location information of the light guide plate and the row area information of the basic light guide plate. This includes:

[0143] Based on the dot location information of the light guide plate and the area information of the basic light guide plate row, obtain the dot location information within each basic light guide plate row area;

[0144] Using the light-incident side as the bottom edge, obtain the length value of the basic light guide plate, that is, the length of the row area of ​​the basic light guide plate;

[0145] Based on the dot location information, the length value, and the width value of the basic light guide plate within each basic light guide plate row area, obtain the dot density information of the basic light guide plate row area;

[0146] Based on the dot density information of the basic light guide plate row area, the model is fitted based on the dot processing technology to obtain the dot density model;

[0147] Based on the dot density model, obtain the standard dot density corresponding to each basic light guide plate row area;

[0148] Based on the dot density information of the basic light guide plate row area, obtain the difference between the dot density of each basic light guide plate row area and the standard dot density;

[0149] The area of ​​the basic light guide plate with the largest difference between the dot density and the standard dot density is taken as the first feature area, and the area of ​​the basic light guide plate with the smallest difference between the dot density and the standard dot density is taken as the second feature area.

[0150] Based on the first feature region, the sum of the positional distances between each point in the first feature region and the other points is taken as the concentration coefficient of the point, and the point with the largest concentration coefficient is taken as the first feature point.

[0151] Based on the second feature region, the sum of the positional distances between each point in the second feature region and the other points is taken as the concentration coefficient of that point, and the point with the largest concentration coefficient is taken as the second feature point.

[0152] Using the incident light side as a reference, light guiding tests are performed on the first and second feature dots to obtain the brightness of the first and second feature dots.

[0153] Based on the standard for brightness difference of light guide plates, the maximum brightness difference value of light guide plates is obtained.

[0154] The difference between the brightness of the first and second feature dots is compared with the maximum brightness difference value of the light guide plate. If the difference between the brightness of the first and second feature dots exceeds the maximum brightness difference value of the light guide plate, the basic light guide plate is unqualified. The dots are adjusted according to the difference between the brightness of the first and second feature dots. If the difference between the brightness of the first and second feature dots does not exceed the maximum brightness difference value of the light guide plate, the basic light guide plate is qualified.

[0155] In this solution, by acquiring the dot position information within each basic light guide plate row area and calculating the dot density information, the uniformity of the dot distribution on the light guide plate can be intuitively reflected. Dot density is one of the key factors affecting the optical performance of the light guide plate. When the energy of light entering the light guide plate is constant, the dot density of the light guide plate follows the principle that light energy gradually decreases with distance. Therefore, the dot density of the light guide plate is sparse near the light-incident side, gradually increases in density in the middle area of ​​the light guide plate, and is most dense in the tail area of ​​the light guide plate. This dot arrangement ensures the overall brightness and uniformity of the light guide plate.

[0156] Understandably, near the light-incident side, the increase in dot density is relatively slow. As distance increases, the rate of increase in dot density gradually accelerates to compensate for light attenuation. This non-linear dot density distribution allows for more efficient use of light, improving the optical performance of the light guide plate and making the light output more uniform across the entire plate. Therefore, by using a dot density model to evaluate the dot density of each row region and comparing the evaluation results with the actual dot density, problematic or representative areas and dots on the light guide plate can be accurately located. This allows for focusing on these key areas during quality inspection and troubleshooting, improving the efficiency and accuracy of problem detection, avoiding a comprehensive and untargeted inspection of the entire light guide plate, and saving time and costs.

[0157] In this embodiment, the basic light guide plate rows are numbered starting from the light-incident side, i.e., the first basic light guide plate row region, the second basic light guide plate row region, the third basic light guide plate row region, ... the nth basic light guide plate row region. The dot density of each basic light guide plate row region is used to fit the model to obtain the dot density model:

[0158]

[0159] In the formula, This represents the standard dot density of the y-th basic light guide plate row area. Indicates the minimum dot density. Indicates the maximum dot density. The density variation coefficient is obtained through data fitting.

[0160] Reference Figure 5 As shown, further, combining the above-mentioned intelligent control method for light guide plate production based on information collaboration, an intelligent control system for light guide plate production based on information collaboration is proposed, including:

[0161] The main control module is used to perform light guiding tests on the first and second feature dots with the light incident side as a reference, obtain the brightness of the first and second feature dots, compare the difference between the brightness of the first and second feature dots with the maximum brightness difference value of the light guide plate to determine whether the basic light guide plate is qualified, divide the basic light guide plate into regions according to the maximum thickness, minimum thickness and light incident side information of the light guide plate, obtain the row region information of the basic light guide plate, obtain the maximum brightness difference value of the light guide plate based on the brightness difference standard of the light guide plate, and adjust the dots according to the difference between the brightness of the first and second feature dots.

[0162] The information acquisition module is used to acquire information on the substrate material of the light guide plate, the type of substrate material, and the parameter information of the substrate material. Based on the light guide plate forming process, it acquires the forming process parameters of the light guide plate, acquires historical production data of the light guide plate, acquires the pass rate information and cost information corresponding to each forming process of the light guide plate based on the historical production data, acquires the dot position information and light incident side information of the light guide plate based on the basic light guide plate, detects the thickness of the basic light guide plate, acquires the maximum thickness and minimum thickness of the light guide plate, and acquires the material characteristic temperature information based on the substrate material information of the light guide plate.

[0163] The evaluation module is used to obtain the quality index of the light guide plate forming process based on the pass rate information, process coefficient and transmittance corresponding to each light guide plate forming process. The light guide plate forming process with the highest quality index is taken as the light guide plate processing process. The light guide plate processing process information is obtained. Based on the dot density information of the basic light guide plate row area, the model is fitted based on the dot processing process to obtain the dot density model. Based on the dot density model, the standard dot density corresponding to each basic light guide plate row area is obtained. Based on the dot density information of the basic light guide plate row area, the difference between the dot density of each basic light guide plate row area and the standard dot density is obtained.

[0164] The display module interacts with the main control module and is used to output and display the light guide plate processing technology information, light guide plate dot position information, light incident side information, basic light guide plate row area information, and dot density model.

[0165] The main control module specifically includes:

[0166] The control unit is used to divide the basic light guide plate into regions based on the maximum thickness of the light guide plate, the minimum thickness of the light guide plate, and the incident light side information, obtain the basic light guide plate row region information, obtain the maximum brightness difference value of the light guide plate based on the brightness difference standard of the light guide plate, and adjust the dots according to the difference between the brightness of the first feature dot and the brightness of the second feature dot.

[0167] An information receiving unit interacts with the information acquisition module and the evaluation module to receive data and transmit it to the judgment unit.

[0168] The judgment unit is used to perform light guiding tests on the first feature dot and the second feature dot with the light incident side as a reference, obtain the brightness of the first feature dot and the brightness of the second feature dot, compare the difference between the brightness of the first feature dot and the brightness of the second feature dot with the maximum brightness difference value of the light guide plate, and determine whether the basic light guide plate is qualified.

[0169] The information acquisition module specifically includes:

[0170] The first acquisition unit is used to acquire information on the substrate material of the light guide plate, information on the type of substrate material, and information on the substrate material parameters. Based on the light guide plate forming process, it acquires the light guide plate forming process parameters, acquires historical production data of the light guide plate, and acquires the pass rate information and cost information corresponding to each light guide plate forming process based on the historical production data of the light guide plate.

[0171] The second acquisition unit is used to acquire dot position information and incident light side information of the light guide plate based on the base light guide plate, detect the thickness of the base light guide plate, acquire the maximum thickness and minimum thickness of the light guide plate, and acquire material characteristic temperature information based on the substrate material information of the light guide plate.

[0172] The evaluation module specifically includes:

[0173] The first evaluation unit is used to obtain the quality index of the light guide plate forming process based on the pass rate information, process coefficient and light transmittance corresponding to each light guide plate forming process, and to take the light guide plate forming process with the largest quality index as the light guide plate processing process, and to obtain the light guide plate processing process information.

[0174] The second evaluation unit is used to fit the model based on the dot density information of the basic light guide plate row area and the dot processing technology to obtain the dot density model. Based on the dot density model, the standard dot density corresponding to each basic light guide plate row area is obtained. Based on the dot density information of the basic light guide plate row area, the difference between the dot density of each basic light guide plate row area and the standard dot density is obtained.

[0175] In summary, the advantages of this invention are as follows: by obtaining the pass rate information, process coefficient, and light transmittance corresponding to each light guide plate forming process, a light guide plate forming process quality index is obtained. This index is then used to screen light guide plate forming processes, improving production efficiency and ensuring the stability and reliability of the light guide plate. Furthermore, by dividing the basic light guide plate into regions, basic light guide plate row area information is obtained. This information is then used to inspect the quality of the light guide plate, ensuring inspection accuracy while improving inspection efficiency.

[0176] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A method for intelligent control of light guide plate production based on information collaboration, characterized in that, include: Obtain information on the substrate material of the light guide plate, including substrate material type information and substrate material parameter information; Based on the light guide plate forming process, the light guide plate forming process parameters are obtained. The light guide plate forming process includes injection molding, compression, and hot pressing. Based on the light guide plate forming process parameters, and according to the light guide plate substrate material information, the light guide plate processing technology information is obtained. Based on the light guide plate processing technology information, the light guide plate substrate material is shaped to obtain the basic light guide plate; Based on the basic light guide plate, obtain the dot location information and light incident side information of the light guide plate; The thickness of the basic light guide plate is measured to obtain the maximum and minimum thickness of the light guide plate. Based on the maximum thickness of the light guide plate, the minimum thickness of the light guide plate, and the information of the light incident side, the basic light guide plate is divided into regions to obtain the row region information of the basic light guide plate. Based on the dot location information of the light guide plate and the row area information of the basic light guide plate, determine whether the basic light guide plate is qualified. If not, adjust the light guide plate according to the row area information of the basic light guide plate. If yes, the basic light guide plate is qualified. The step of determining whether the basic light guide plate is qualified based on the dot location information of the light guide plate and the row area information of the basic light guide plate specifically includes: Based on the dot location information of the light guide plate and the area information of the basic light guide plate row, obtain the dot location information within each basic light guide plate row area; Using the light-incident side as the bottom edge, obtain the length value of the basic light guide plate, that is, the length of the row area of ​​the basic light guide plate; Based on the dot location information, the length value, and the width value of the basic light guide plate within each basic light guide plate row area, obtain the dot density information of the basic light guide plate row area; Based on the dot density information of the basic light guide plate row area, the model is fitted based on the dot processing technology to obtain the dot density model; Based on the dot density model, obtain the standard dot density corresponding to each basic light guide plate row area; Based on the dot density information of the basic light guide plate row area, obtain the difference between the dot density of each basic light guide plate row area and the standard dot density; The area of ​​the basic light guide plate with the largest difference between the dot density and the standard dot density is taken as the first feature area, and the area of ​​the basic light guide plate with the smallest difference between the dot density and the standard dot density is taken as the second feature area. Based on the first feature region, the sum of the positional distances between each point in the first feature region and the other points is taken as the concentration coefficient of the point, and the point with the largest concentration coefficient is taken as the first feature point. Based on the second feature region, the sum of the positional distances between each point in the second feature region and the other points is taken as the concentration coefficient of that point, and the point with the largest concentration coefficient is taken as the second feature point. Using the incident light side as a reference, light guiding tests are performed on the first and second feature dots to obtain the brightness of the first and second feature dots. Based on the standard for brightness difference of light guide plates, the maximum brightness difference value of light guide plates is obtained. The difference between the brightness of the first and second feature dots is compared with the maximum brightness difference value of the light guide plate. If the difference between the brightness of the first and second feature dots exceeds the maximum brightness difference value of the light guide plate, the basic light guide plate is unqualified. The dots are adjusted according to the difference between the brightness of the first and second feature dots. If the difference between the brightness of the first and second feature dots does not exceed the maximum brightness difference value of the light guide plate, the basic light guide plate is qualified.

2. The intelligent control method for light guide plate production based on information collaboration according to claim 1, characterized in that, The process of obtaining light guide plate processing information based on light guide plate molding process parameters and substrate material information specifically includes: Based on the light guide plate forming process parameters, obtain the light transmittance and material limit light transmittance corresponding to each light guide plate forming process; Obtain historical production data of light guide plates, which includes historical data of light guide plates corresponding to each light guide plate forming process; Based on historical production data of light guide plates, obtain the pass rate and cost information corresponding to each light guide plate molding process; The proportion of cost information corresponding to each light guide plate forming process is used as the process coefficient of that light guide plate forming process; Based on the pass rate information, process coefficient and light transmittance corresponding to each light guide plate forming process, the quality index of the light guide plate forming process is obtained; The light guide plate forming process with the highest quality index is taken as the light guide plate processing process, and information on the light guide plate processing process is obtained. The formula for calculating the quality index of the light guide plate molding process is as follows: In the formula, Let x be the quality index of the light guide plate forming process for the xth light guide plate forming process. This represents the light transmittance of the x-th light guide plate forming process. This represents the pass rate of the xth light guide plate forming process. This represents the process coefficient for the x-th light guide plate forming process. This indicates the material's maximum light transmittance.

3. The intelligent control method for light guide plate production based on information collaboration according to claim 2, characterized in that, The step of obtaining the light transmittance and material limit light transmittance corresponding to each light guide plate forming process based on the light guide plate forming process parameters specifically includes: Based on the material information of the light guide plate substrate, material characteristic temperature information is obtained, including Vicat softening temperature and heat distortion temperature. Based on the requirements of the light guide plate forming process parameters, the Vicat softening temperature is used as the hot pressing process temperature, and the heat distortion temperature is used as the injection molding process temperature. Based on the substrate material parameter information in the light guide plate substrate material information, obtain the temperature change curve of the substrate material transmittance; Based on the hot pressing process temperature and the injection molding process temperature, the transmittance of the hot pressing process and the transmittance of the injection molding process are obtained according to the transmittance temperature change curve of the substrate material. Based on the information about the light guide plate substrate material, obtain the light transmittance and the material's limiting light transmittance of the substrate material; The light transmittance of the substrate material is used as the light transmittance of the compression process. Based on the light transmittance of the hot pressing process, the light transmittance of the injection molding process, and the light transmittance of the compression process, the light transmittance corresponding to each light guide plate forming process is obtained.

4. The intelligent control method for light guide plate production based on information collaboration according to claim 1, characterized in that, The process of molding the light guide plate substrate material based on the light guide plate processing technology information to obtain the basic light guide plate specifically includes: Based on the light guide plate processing technology information, obtain the light guide plate processing parameters; The light guide plate substrate material is shaped based on the light guide plate processing parameters to obtain the basic light guide plate; If the light guide plate is processed by injection molding, the light guide plate substrate material is injection molded at the injection molding temperature to obtain the light guide plate substrate. If the light guide plate is processed by compression, the light guide plate substrate material is compressed and molded to obtain the light guide plate substrate. Based on the dot matrix processing technology, the light guide plate substrate is processed to obtain the basic light guide plate; If the light guide plate is manufactured using a hot pressing process, the substrate material of the light guide plate is hot-pressed at the hot pressing process temperature to obtain the basic light guide plate.

5. The intelligent control method for light guide plate production based on information collaboration according to claim 1, characterized in that, The process of dividing the basic light guide plate into regions based on the maximum thickness, minimum thickness, and incident light side information to obtain the basic light guide plate row region information specifically includes: Based on the light guide plate detection requirements, obtain the threshold width of the light guide plate row area; Using the light-incident side as the bottom edge, obtain the width value of the basic light guide plate; The initial width of the light guide plate row area is obtained based on the basic light guide plate width value and the light guide plate row area width threshold. Based on the light guide plate production standards, obtain the standard thickness of the light guide plate; The thickness deviation coefficient of the light guide plate is obtained based on the maximum thickness, minimum thickness, and standard thickness of the light guide plate. The width of the light guide plate row area is obtained based on the initial width of the light guide plate row area and the thickness deviation coefficient of the light guide plate. Using the light-incident side as the initial boundary of the row area, and using the width of the row area of ​​the light guide plate as the reference, the basic light guide plate is divided into areas to obtain the row area information of the basic light guide plate. Specifically, the initial width of the light guide plate row area is: In the formula, This indicates the initial width of the light guide plate row area. This represents the width of the basic light guide plate, where n is a constant. Let n gradually increase until... ; The width of the light guide plate row area is specifically: In the formula, D is the width of the light guide plate row area. This is the thickness deviation coefficient of the light guide plate. This is the minimum thickness of the light guide plate. This is the maximum thickness of the light guide plate. This refers to the standard thickness of the light guide plate.

6. An intelligent control system for light guide plate production based on information collaboration, used to implement the control method as described in any one of claims 1-5, characterized in that, include: The main control module is used to perform light guiding tests on the first and second feature dots with the light incident side as a reference, obtain the brightness of the first and second feature dots, compare the difference between the brightness of the first and second feature dots with the maximum brightness difference value of the light guide plate to determine whether the basic light guide plate is qualified, divide the basic light guide plate into regions according to the maximum thickness, minimum thickness and light incident side information of the light guide plate, obtain the row region information of the basic light guide plate, obtain the maximum brightness difference value of the light guide plate based on the brightness difference standard of the light guide plate, and adjust the dots according to the difference between the brightness of the first and second feature dots. The information acquisition module is used to acquire information on the substrate material of the light guide plate, the type of substrate material, and the parameter information of the substrate material. Based on the light guide plate forming process, it acquires the forming process parameters of the light guide plate, acquires historical production data of the light guide plate, acquires the pass rate information and cost information corresponding to each forming process of the light guide plate based on the historical production data, acquires the dot position information and light incident side information of the light guide plate based on the basic light guide plate, detects the thickness of the basic light guide plate, acquires the maximum thickness and minimum thickness of the light guide plate, and acquires the material characteristic temperature information based on the substrate material information of the light guide plate. The evaluation module is used to obtain the quality index of the light guide plate forming process based on the pass rate information, process coefficient and transmittance corresponding to each light guide plate forming process. The light guide plate forming process with the highest quality index is taken as the light guide plate processing process. The light guide plate processing process information is obtained. Based on the dot density information of the basic light guide plate row area, the model is fitted based on the dot processing process to obtain the dot density model. Based on the dot density model, the standard dot density corresponding to each basic light guide plate row area is obtained. Based on the dot density information of the basic light guide plate row area, the difference between the dot density of each basic light guide plate row area and the standard dot density is obtained. The display module interacts with the main control module and is used to output and display the light guide plate processing technology information, light guide plate dot position information, light incident side information, basic light guide plate row area information, and dot density model.

7. The intelligent control system for light guide plate production based on information collaboration according to claim 6, characterized in that, The main control module specifically includes: The control unit is used to divide the basic light guide plate into regions based on the maximum thickness of the light guide plate, the minimum thickness of the light guide plate, and the incident light side information, obtain the basic light guide plate row region information, obtain the maximum brightness difference value of the light guide plate based on the brightness difference standard of the light guide plate, and adjust the dots according to the difference between the brightness of the first feature dot and the brightness of the second feature dot. An information receiving unit interacts with the information acquisition module and the evaluation module to receive data and transmit it to the judgment unit. The judgment unit is used to perform light guiding tests on the first feature dot and the second feature dot with the light incident side as a reference, obtain the brightness of the first feature dot and the brightness of the second feature dot, compare the difference between the brightness of the first feature dot and the brightness of the second feature dot with the maximum brightness difference value of the light guide plate, and determine whether the basic light guide plate is qualified.

8. The intelligent control system for light guide plate production based on information collaboration according to claim 6, characterized in that, The information acquisition module specifically includes: The first acquisition unit is used to acquire information on the substrate material of the light guide plate, information on the type of substrate material, and information on the substrate material parameters. Based on the light guide plate forming process, it acquires the light guide plate forming process parameters, acquires historical production data of the light guide plate, and acquires the pass rate information and cost information corresponding to each light guide plate forming process based on the historical production data of the light guide plate. The second acquisition unit is used to acquire dot position information and incident light side information of the light guide plate based on the base light guide plate, detect the thickness of the base light guide plate, acquire the maximum thickness and minimum thickness of the light guide plate, and acquire material characteristic temperature information based on the substrate material information of the light guide plate.

9. The intelligent control system for light guide plate production based on information collaboration according to claim 6, characterized in that, The evaluation module specifically includes: The first evaluation unit is used to obtain the quality index of the light guide plate forming process based on the pass rate information, process coefficient and light transmittance corresponding to each light guide plate forming process, and to take the light guide plate forming process with the largest quality index as the light guide plate processing process, and to obtain the light guide plate processing process information. The second evaluation unit is used to fit the model based on the dot density information of the basic light guide plate row area and the dot processing technology to obtain the dot density model. Based on the dot density model, the standard dot density corresponding to each basic light guide plate row area is obtained. Based on the dot density information of the basic light guide plate row area, the difference between the dot density of each basic light guide plate row area and the standard dot density is obtained.

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