Flexible large-curved-surface screen fitting quality detection system and method and storage medium

Abstract

The invention provides a flexible large-curved-surface screen fitting quality detection system and method and a storage medium. The system comprises a main control device, a model identification device, a position detection device, a curved surface compatibility detection device, a comprehensive performance verification device, an inferior-quality product marking device and a mechanical arm device. The model identification device identifies the model of the product based on comparison between the product size parameter and the BOM; the position detection device detects the preliminary fitting position of the product; the curved surface compatibility detection device detects the curved surface compatibility of the product; the comprehensive performance verification device is used for detecting the fitting precision, the optical performance, the structural stability and the functional compatibility of the product; the inferior-quality product marking device marks products in a classified manner according to defect types; and the mechanical arm device is used for clamping the product and adjusting the position. The system performs model identification, position detection, curved surface compatibility detection and comprehensive performance verification in sequence through a multi-stage detection process, can accurately detect the fitting quality of the flexible large curved surface screen, reduces the false detection rate and the omission ratio, and improves the product quality control level.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of screen assembly quality control, and particularly relates to a flexible large curved screen bonding quality detection system and method and a storage medium. BACKGROUND

[0002] With the rapid development of the consumer electronics market, flexible large curved screens have been widely used in portable devices such as smartphones and tablets due to their unique visual effects, comfortable feel, and innovative design concepts. Currently, almost all major mobile phone brands have launched models equipped with curved screens to meet consumers' pursuit of high-quality display experiences. However, the bonding quality of flexible large curved screens directly affects the display effect, structural stability, and user experience of the final product, so the precision detection and quality control during the bonding process become a key link in the manufacturing process.

[0003] The existing bonding quality detection basically adopts a single light source lighting combined with a fixed curvature detection platform, which has many limitations and deficiencies, specifically as follows: 1. Insufficient compatibility Current detection systems are mainly designed for specific curvatures (such as 2.5D or double curved surfaces), making it difficult to accommodate complex screen shapes such as four curved surfaces and irregular curved surfaces. For example, when detecting a four curved screen, the traditional ring light source cannot uniformly cover all curved surface areas, resulting in blurred imaging at the edge area, which requires frequent replacement of detection tools or adjustment of parameters, increasing production costs and time.

[0004] 2. Imaging effect and detection accuracy issues A single light source (such as a pure white backlight) is prone to produce reflections or shadows during curved screen detection, especially at the transition between the AA area (effective display area) and the VA area (frame ink area) of the screen, resulting in low imaging contrast and large detection error for key parameters such as edge margin accuracy and round hole position. According to statistics, the misdiagnosis rate of traditional systems in curved screen detection can reach 15%, and the missed diagnosis rate can reach 8%.

[0005] 3. Low detection process and efficiency The existing detection process lacks a grading mechanism, with all parameters (such as basic dimensions, edge margin accuracy, and optical performance) detected at once, resulting in: Waste of resources: low-risk parameters (such as basic dimensions) are mixed with high-risk parameters (such as touch sensitivity) for detection, occupying the same amount of time; Risk concealment: high-risk issues may be concealed by low-level detection, such as local screen delamination not found in early detection, which is only exposed in final functional testing.

[0006] 4. Poor light source adaptability Different materials (such as CPI film, ultra-thin glass) and surface treatment processes (such as AG frosted, AF anti-fingerprint) have significant differences in screen light source reflection characteristics, and traditional light sources cannot be dynamically adjusted, resulting in large fluctuations in imaging effects of the same detection platform for different products, and unstable yield. SUMMARY

[0007] To solve the defects of the prior art, the present application provides an efficient, accurate and highly compatible solution, which aims to realize accurate detection of the bonding quality of flexible large curved screens by innovative light source combination lighting mode (blue 45° ring light + white backlight), multi-stage detection process design (one-stage basic parameter detection → two-stage curved surface compatibility detection → three-stage comprehensive performance verification) and intelligent detection parameter management, improve the detection compatibility to more than 90%, reduce the false detection rate to less than 3%, and shorten the single piece detection time by 30%, so as to meet the stringent requirements of high-end consumer electronic products on quality control.

[0008] The technical scheme adopted by the present application is as follows: A flexible large curved screen bonding quality detection system is provided, comprising a main control device, a model identification device electrically connected to the main control device, a position detection device, a curved surface compatibility detection device, a comprehensive performance verification device, a defective product marking device and a mechanical arm device; the model identification device compares the size parameters of the product with the product BOM to identify the product model; the position detection device is used to detect the preliminary bonding position of the product; the curved surface compatibility detection device is used to detect the curved surface compatibility of the product; the comprehensive performance verification device is used to detect the bonding accuracy, optical performance, structural stability and functional compatibility of the product; the defective product marking device classifies and marks the product based on different defect types; and the mechanical arm device is used to clamp and adjust the position of the product.

[0009] Preferably, the main control device controls the mechanical arm device to be always on, and controls the model identification device, the position detection device, the curved surface compatibility detection device, the comprehensive performance verification device and the defective product marking device to be always off.

[0010] Further, after the flexible large curved screen is pasted, the system controls the robot device to place the product to be detected (such as the finished product after the CG and the Panel are pasted) on the initial detection position; the system controls the type identification device to start, detects the size parameters of the product based on the image recognition technology, identifies the type of the product, and based on different types, the detection parameter standards of different types are different; then controls the position detection device to start, detects the initial pasting position, if it meets the standard (i.e. within the allowable range of the product position), triggers the secondary detection, controls the robot to move the product to the secondary detection position, otherwise, the system controls the robot to adjust the product position or size, re-performs the primary detection, until the conditions are met; the system controls the curved surface compatibility detection device to start, based on the vision system (first uses the blue 45° ring light to position the VA ink area, and then uses the white backlight to position the AA area), takes a fine photo of the product, evaluates the imaging effect of the product under different types of light sources (blue 45° ring light + white backlight), to verify the curved surface compatibility, if the curved surface compatibility meets the standard, marks the defective product through the defective product marking device, otherwise, the system controls the robot to move the product to the tertiary detection position; the system controls the comprehensive performance verification device to start, respectively detects the pasting precision, optical performance, structural stability and functional compatibility of the product, if all meet the standard, i.e. the comprehensive performance meets the standard, the long-term stability is good, the product passes the detection, enters the next production link or is packaged and shipped, otherwise, any item does not meet the standard, marks the defective product through the defective product marking device, the marked product is repaired or disposed of, and the problems are recorded to optimize the subsequent production process.

[0011] Further, the comprehensive performance verification device is composed of a lamination precision detection unit, an optical performance detection unit, a structural stability detection unit, and a functional compatibility detection unit; the lamination precision detection unit is used to detect the margin error of the four sides of the CG (cover glass) and Panel (display screen) after lamination, the position deviation and diameter size of the screen opening (such as camera, fingerprint recognition hole), and the gap uniformity of the curved lamination area; the optical performance detection unit is used to detect the light transmittance of different areas of the screen, the deviation of the screen display color from the standard value, and the brightness difference between the center and the edge of the screen; the structural stability detection unit detects the bonding strength of the CG and Panel through a tensile testing machine, simulates the structural integrity after repeated bending of the screen, evaluates the bending resistance of the curved screen, and tests the deformation or performance attenuation of the screen under extreme conditions in an environmental test chamber; the functional compatibility detection unit detects the response speed and accuracy of multi-point touch of the screen through a touch tester, verifies the unlocking success rate of the fingerprint sensor under the screen, and detects the identification accuracy of hierarchical touch for screens supporting pressure sensing. It should be noted that the test content standard of the comprehensive performance verification device is based on the industry standard of the lamination process of flexible large curved surface products (such as GB / T 36643-2018 “Technical Specification for Touch Screen Cover Glass”).

[0012] Preferably, the detection standards of the system for various parameters of the product are as follows: the type identification device detects the curvature radius of the product curved surface, and different curvature radii correspond to different product models (such as 2.5D screen: R3000-5000mm; four curved surface screen: R2000-3000mm); the position detection device calculates the deviation between the actual lamination position and the design position through image recognition algorithm, and the detection standards include X / Y / Z axis offset of CG (cover glass) and Panel (display screen) ≤0.1mm, rotation angle deviation ≤0.5°, and lamination area coverage rate ≥99.5%; the curved surface compatibility detection device detects the edge definition of the VA ink area under blue 45° annular light based on a vision system, contrast ≥50:1, AA area display uniformity under white backlight, brightness difference ≤5%, and if the imaging effect under any light source is not up to standard (such as ink area blur or display dark spot), it is determined that the curved surface compatibility is insufficient.

[0013] Further, the detection standards of each parameter of the product by the comprehensive performance verification device are as follows: the bonding precision detection unit uses a laser profiler or a high-precision vision system to measure, and if the tolerance is exceeded, it is determined that the bonding is poor, and the content standards of the detection are as follows: the edge precision, the gap between CG and Panel is less than or equal to 0.05 mm; the hole concentricity, the camera hole deviation is less than or equal to 0.03 mm; the curved surface bonding gap uniformity, the maximum gap minus the minimum gap is less than or equal to 0.08 mm; the optical performance detection unit uses a spectrophotometer and a brightness meter to measure, and if any parameter is not up to standard, it is determined that there is an optical defect, and the content standards of the detection are as follows: the light transmittance, the AA area is greater than or equal to 92%, and the VA area is less than or equal to 5%; the color difference, the delta E is less than or equal to 1.5, which meets the sRGB color gamut standard; the brightness uniformity, the ratio of the center brightness to the edge brightness is greater than or equal to 90%; the structure stability detection unit is verified by a tensile testing machine, a bending tester and an environmental test chamber, and if any test fails, it is determined that the structure is unstable, and the content standards of the detection are as follows: the peeling strength, the bonding force between CG and Panel is greater than or equal to 5N ; the bending resistance, the peeling is not caused after 100,000 times of bending with a curvature radius of 1.5 mm; the high temperature and high humidity resistance, no deformation is caused after 48 hours in an environment of 85 DEG C / 85%RH; the function compatibility detection unit is verified by a touch tester and a fingerprint simulation device, and if the function parameter is not up to standard, it is determined that the compatibility is insufficient, and the content standards of the detection are as follows: the touch sensitivity, the response time of 10-point touch is less than or equal to 50 ms; the fingerprint recognition rate, the recognition success rate is greater than or equal to 98% under dry hand / wet hand conditions; the 3D touch depth detection, the pressure sensing level recognition error is less than or equal to 0.05 mm.

[0014] The application also provides a flexible large curved screen bonding quality detection method, which is realized based on the flexible large curved screen bonding quality detection system, and is used for realizing accurate detection of the bonding quality of the flexible large curved screen, reducing the false detection rate and the missed detection rate, and increasing product quality control.

[0015] The application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the flexible large curved screen bonding quality detection method.

[0016] The application has the following beneficial effects: 1. Improved compatibility: the combination of blue 45-degree ring light and white backlight effectively compatible with various forms of flexible large curved screens such as 2.5D curved screen, double curved screen and four curved screen, reduces the imaging effect deviation caused by the difference in screen form.

[0017] 2. Optimized imaging effect and detection accuracy: through the complementary effect of different types of light sources, the imaging clarity of key parts such as screen edge and curved surface transition area is improved, the device alarm rate is reduced, and the false detection and missed detection phenomenon is reduced.

[0018] 3. Multi-stage detection process design: design one-stage, two-stage and three-stage multi-stage detection process, clearly define the parameter range and risk level of each stage detection, ensure the efficient use of detection resources and the comprehensiveness of detection results. At the same time, through the logical relationship design, ensure the rigor and reliability of the detection process.

[0019] In summary, the present application provides an efficient, accurate and highly compatible solution for flexible large curved screen bonding quality detection, which helps to improve the overall quality and market competitiveness of consumer electronic products. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be described by way of example and with reference to the accompanying drawings, in which: Figure 1 The flow chart of the flexible large curved screen bonding quality detection method in the present application; Figure 2 The structure schematic diagram of the flexible large curved screen bonding quality detection system in the present application; Figure 3 The structure schematic diagram of the comprehensive performance verification device in the present application. DETAILED DESCRIPTION

[0021] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Embodiment one A flexible large curved screen bonding quality detection system, referring to Figure 2 , comprising a main control device, a model identification device, a position detection device, a curved compatibility detection device, a comprehensive performance verification device, a defective product marking device and a mechanical arm device. These devices are electrically connected with the main control device, and cooperate to complete the comprehensive detection of the bonding quality of the flexible large curved screen.

[0023] The main control device is the control core of the entire system, responsible for coordinating the work of each functional module. The main control device uses a high-performance industrial computer, equipped with a dedicated detection system software, with functions such as data processing, instruction distribution, and result analysis. The main control device controls the mechanical arm device to be always open, controls the model identification device, position detection device, curved surface compatibility detection device, comprehensive performance verification device, and defective product marking device to be always closed, ensuring that the system performs each detection work in an orderly manner according to the preset process during the detection process.

[0024] The model identification device is equipped with a high-definition industrial camera and an image processing unit, which compares the size parameters of the product with the product BOM (Bill of Materials) to identify the product model. This device can detect the curvature radius of the product curved surface, and different curvature radii correspond to different product models, such as the curvature radius of a 2.5D screen is R3000-5000mm, and the curvature radius of a four-curved surface screen is R2000-3000mm. The model identification device accurately measures the geometric characteristics of the product and compares them with the standard parameters in the database to determine the specific model of the product, providing parameter basis for subsequent detection.

[0025] The position detection device is equipped with a precision positioning system and a position sensor, which is used to detect the initial fitting position of the product. This device calculates the deviation between the actual fitting position and the design position through image recognition algorithms, and the detection standards include that the X / Y / Z axis offset between the CG (cover glass) and the Panel (display screen) is not more than 0.1mm, the rotation angle deviation is not more than 0.5°, and the fitting area coverage rate is not less than 99.5%. The position detection device can monitor the position state of the product on the detection platform in real time, ensuring the accuracy and stability of the product position during the detection process.

[0026] The curved surface compatibility detection device is equipped with a multi-light source illumination system and a high-precision imaging device, which is used to detect the curved surface compatibility of the product. This device detects the VA ink area edge definition under blue 45° ring light, contrast not less than 50:1, AA area display uniformity under white backlight, brightness difference not more than 5%. If the imaging effect under any light source does not meet the standard, such as ink area blur or display dark spots, it is determined that the curved surface compatibility is insufficient. The curved surface compatibility detection device simulates different light conditions in different use environments to comprehensively evaluate the display effect and visual performance of the product in actual application.

[0027] Referring to Figure 3 , the comprehensive performance verification device is composed of a fitting accuracy detection unit, an optical performance detection unit, a structural stability detection unit, and a functional compatibility detection unit, which is used to detect the fitting accuracy, optical performance, structural stability, and functional compatibility of the product.

[0028] The fit accuracy detection unit is measured by a laser profiler or a high-precision vision system, which is used to detect the margin error of the four sides of the CG and the panel after fitting, the position deviation and diameter size of the screen aperture, and the gap uniformity of the curved fitting area. The detection standards include: margin accuracy, the gap between the CG and the panel edge is not more than 0.05 mm; round hole concentricity, the camera hole deviation is not more than 0.03 mm; curved fitting gap uniformity, the difference between the maximum gap and the minimum gap is not more than 0.08 mm. Exceeding the standard is judged as poor fit.

[0029] The optical performance detection unit is measured by a spectrophotometer and a brightness meter, which is used to detect the transmittance of different areas of the screen, the deviation of the screen display color from the standard value, and the brightness difference between the center and the edge of the screen. The detection standards include: transmittance, AA area not less than 92%, VA area not more than 5%; color difference, ΔE not more than 1.5, meeting the sRGB color gamut standard; brightness uniformity, the brightness ratio of the center to the edge is not less than 90%. Any parameter that does not meet the standard is judged as optical defect.

[0030] The structural stability detection unit is verified by a tensile testing machine, a bending tester and an environmental test chamber. The tensile testing machine is used to detect the bonding strength of the CG and the panel, the structural integrity after repeated bending of the screen, and the bending resistance of the curved screen. The environmental test chamber is used to test the deformation or performance decay of the screen under extreme conditions. The detection standards include: peel strength, the bonding force of the CG and the panel is not less than 5N / ; bending resistance, no delamination after 100,000 times of bending with a radius of 1.5 mm; high temperature and humidity resistance, no deformation after 48 hours in an environment of 85°C / 85%RH. Any test failure is judged as structural instability.

[0031] The functional compatibility detection unit uses a touch tester and a fingerprint simulation device to verify. The touch tester is used to detect the response speed and accuracy of multi-point touch of the screen, verify the unlocking success rate of the fingerprint sensor under the screen, and detect the recognition accuracy of the level touch for screens supporting pressure sensing. The detection standards include: touch sensitivity, 10-point touch response time is not more than 50ms; fingerprint recognition rate, recognition success rate is not less than 98% under dry / humid conditions; 3D touch depth detection, pressure sensing level recognition error is not more than 0.05mm. Any parameter that does not meet the standard is judged as insufficient compatibility.

[0032] The defective product marking device is equipped with an automatic marking system and a classification management unit, which classifies and marks products based on different defect types. The device can accurately mark unqualified products according to the test results, facilitating subsequent repair or scrap processing. The defective product marking device uses a marking method that does not damage the product, ensuring that the marking process does not cause additional damage to the product.

[0033] The mechanical arm device is equipped with a multi-joint industrial robot arm and a precision clamping tool for clamping and positioning the product. The mechanical arm device has high-precision positioning capability and flexible motion trajectory, and can accurately place the product at each detection station according to the detection requirements, and make corresponding adjustments or transfers according to the detection results.

[0034] When the flexible large curved screen is attached, the system detection process is as follows: the system controls the mechanical arm device to place the product to be detected (such as the finished product after the CG and Panel are attached) on the initial detection position; the system controls the model recognition device to start, detects the size parameters of the product based on image recognition technology, identifies the model of the product, and based on different models, different detection parameter standards are different; then control the position detection device to start, detect the preliminary attachment position, if it meets the standard (i.e. within the allowable range of product position), trigger secondary detection, control the mechanical arm to transfer the product to the secondary detection position, otherwise, the system controls the mechanical arm to adjust the product position or size, and re-performs primary detection until the conditions are met; the system controls the curved surface compatibility detection device to start, based on the vision system (first use blue 45° ring light to position the VA ink area, then use white backlight to position the AA area) to take fine photos of the product, evaluate the imaging effect of the product under different types of light sources (blue 45° ring light + white backlight) to verify the curved surface compatibility, if the curved surface compatibility meets the standard, mark the defective product through the defective product marking device, otherwise, the system controls the mechanical arm to transfer the product to the third detection position; the system controls the comprehensive performance verification device to start, respectively detects the attachment precision, optical performance, structural stability and functional compatibility of the product, if all meet the standard, i.e. the comprehensive performance meets the standard, the long-term stability is good, the product passes the detection, enters the next production link or is packaged and shipped, otherwise, any item that does not meet the standard is marked as defective through the defective product marking device, the marked product is repaired or disposed of, and the problem is recorded to optimize the subsequent production process.

[0035] The test content standard of the comprehensive performance verification device is based on the industry standard of the flexible large curved product attachment process (such as GB / T 36643-2018 “Technical Specification for Touch Screen Cover Glass”), to ensure the authority and reliability of the detection results. Through this series of strict detection process, the system can comprehensively evaluate the attachment quality of the flexible large curved screen, effectively identify and mark various defects, and improve the product qualification rate and production efficiency.

[0036] Embodiment Two A flexible large curved screen attachment quality detection method based on the flexible large curved screen attachment quality detection system described in embodiment one, for realizing accurate detection of the attachment quality of the flexible large curved screen, reducing the false rejection rate and the missed detection rate, and increasing product quality control.

[0037] This method utilizes the hardware devices described in Embodiment 1, including the main control device, model identification device, position detection device, surface compatibility detection device, comprehensive performance verification device, defect marking device, and robotic arm device. (See also...) Figure 1 The following steps are used to test the bonding quality of the flexible curved screen: Step 1: Product Placement The robotic arm places the product to be inspected (such as the finished product after CG and panel are bonded together) at the initial inspection position, ready to start the inspection process.

[0038] Step 2: Model Identification The main control unit activates the model identification device, which uses image recognition technology to detect product dimensions and identify the product model. The model identification device measures the product's surface curvature radius and compares it with the product's BOM (Bill of Materials) to determine the specific product model, providing corresponding parameter standards for subsequent testing.

[0039] Step 3: Position Detection The main control unit activates the position detection device to initially detect the product's bonding position. The position detection device uses image recognition algorithms to calculate the deviation between the actual bonding position and the designed position, detecting whether the X / Y / Z axis offsets, rotation angle deviations, and bonding area coverage of the CG and Panel meet the standards. If they meet the standards, a secondary detection is triggered, and the main control unit controls the robotic arm to move the product to the secondary detection position. If they do not meet the standards, the main control unit controls the robotic arm to adjust the product's position or size, and the primary detection is repeated until the conditions are met.

[0040] Step 4: Surface Compatibility Test The main control unit activates the surface compatibility testing device, which uses a vision system to take detailed photos of the product. The testing process first uses a blue 45° ring light to locate the VA ink area, then uses a white backlight to locate the AA area, evaluating the product's imaging effect under different light sources to verify surface compatibility. If the surface compatibility does not meet the standard, it is marked as defective using a defect marking device; if it meets the standard, the main control unit controls the robotic arm to move the product to the third-level testing position.

[0041] Step 5: Comprehensive Performance Verification The main control unit activates the comprehensive performance verification device to test the product's bonding accuracy, optical performance, structural stability, and functional compatibility. Fitting accuracy inspection: Use a laser profilometer or high-precision vision system to measure the margin error around the CG and Panel after they are bonded, the position deviation and diameter of the screen openings, and the uniformity of the gap in the curved bonding area.

[0042] Optical performance detection: Use a spectrophotometer and a brightness meter to measure the transmittance of different areas of the screen, the deviation of the screen display color from the standard value, and the brightness difference between the center and the edge of the screen.

[0043] Structural stability detection: Detect the bonding strength of CG and Panel, the structural integrity after repeated bending of the screen, evaluate the bending resistance of the curved screen, and test the deformation or performance degradation of the screen under extreme conditions in the environmental test chamber.

[0044] Functional compatibility detection: Detect the response speed and accuracy of multi-point touch of the screen, verify the unlocking success rate of the fingerprint sensor under the screen, and detect the recognition accuracy of hierarchical touch for screens supporting pressure sensing.

[0045] Step six: result determination and processing If all the detections of comprehensive performance verification meet the standards, that is, the comprehensive performance meets the standards and the long-term stability is good, the product is determined to pass the detection and enters the next production link or is packaged for delivery; if any detection does not meet the standards, the substandard product is marked by a substandard marking device, the marked product is repaired or disposed of, and the problem is recorded to optimize the subsequent production process.

[0046] Through the above detection method, the bonding quality of the flexible large curved screen can be comprehensively evaluated, and the product quality can be accurately controlled. This method uses various advanced detection technologies and strict detection standards, which can effectively identify various potential defects, greatly reduce the false rejection rate and the missed detection rate, improve the product quality and production efficiency, and provide reliable quality assurance for the large-scale production of flexible large curved screens.

[0047] Example three A computer readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement a flexible large curved screen bonding quality detection method. The computer readable storage medium can be a read-only memory (ROM), a random access memory (RAM), an optical disc, a U disk, a mobile hard disk, a flash card, and various media that can store program codes.

[0048] The computer program is executed by the processor to implement the flexible large curved screen bonding quality detection method described in example two. Specifically, the computer program includes program codes for performing product placement, model identification, position detection, curved screen compatibility detection, comprehensive performance verification, and result determination and processing.

[0049] In the embodiment, the computer program can control the main control device, the model identification device, the position detection device, the curved surface compatibility detection device, the comprehensive performance verification device, the defective product marking device, and the mechanical arm device and other hardware devices described in embodiment one to work cooperatively when executed by the processor, so as to realize accurate detection of the flexible large curved screen bonding quality.

[0050] The algorithm modules in the computer program include an image recognition module, a position deviation calculation module, a curved surface compatibility evaluation module, and a comprehensive performance analysis module. These modules correspond to the detection steps described in embodiment two respectively, and complete various detection tasks by executing corresponding program codes by the processor, so as to finally realize comprehensive evaluation of the flexible large curved screen bonding quality.

[0051] In a preferred embodiment, the computer readable storage medium further contains a database module for data storage, for storing standard parameters, historical detection data, and defect type library of various products, providing a reference basis for the detection process, and being able to optimize the detection algorithm through data analysis to improve the detection accuracy.

[0052] By realizing the flexible large curved screen bonding quality detection method as a computer program and storing it on the computer readable storage medium, the detection process can be more standardized and automated, human factor interference can be reduced, and the detection efficiency and accuracy can be improved, so as to provide reliable quality guarantee for the large-scale production of the flexible large curved screen.

[0053] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible large curved screen adhesion quality detection system, characterized in that, The application relates to a flexible large-curved-surface-screen detection system. The system comprises a main control device, a model identification device, a position detection device, a curved-surface compatibility detection device, a comprehensive performance verification device, a defective product marking device and a mechanical arm device. The model identification device compares product size parameters with a product bill of materials to identify the product model. The position detection device is used to detect the initial fitting position of the product. The curved-surface compatibility detection device is used to detect the curved-surface compatibility of the product. The comprehensive performance verification device is used to detect the fitting accuracy, optical performance, structural stability and functional compatibility of the product. The defective product marking device classifies and marks the product based on different defect types. The mechanical arm device is used to clamp and position the product. 2.The flexible large curved screen quality detection system according to claim 1, characterized in that, The main control device controls the mechanical arm device to be always open, and controls the model identification device, the position detection device, the curved-surface compatibility detection device, the comprehensive performance verification device and the defective product marking device to be always closed. 3.The flexible large curved screen quality detection system according to claim 2, characterized in that, After the flexible large-curved-surface screen is fitted, the system controls the mechanical arm device to place the product to be detected on an initial detection position. The system controls the model identification device to be turned on, detects the size parameters of the product based on image recognition technology, and identifies the product model. The system controls the position detection device to be turned on, detects the initial fitting position of the product, and triggers secondary detection if the initial fitting position meets the standard. The system controls the curved-surface compatibility detection device to be turned on, takes fine photos of the product based on a vision system, evaluates the imaging effect of the product under different types of light sources, and verifies the curved-surface compatibility. The system controls the comprehensive performance verification device to be turned on, detects the fitting accuracy, optical performance, structural stability and functional compatibility of the product.

4. The flexible large curved screen adhesion quality detection system according to claim 3, characterized in that, The comprehensive performance verification device comprises a fitting accuracy detection unit, an optical performance detection unit, a structural stability detection unit and a functional compatibility detection unit. The fitting accuracy detection unit is used to detect the margin error of the four sides of the cover plate glass and the display screen after fitting, the position deviation and diameter size of the screen opening and the gap uniformity of the curved fitting area. The optical performance detection unit is used to detect the light transmittance of different areas of the screen, the deviation of the screen display color from the standard value and the brightness difference between the center and the edge of the screen. The structural stability detection unit detects the bonding strength of the cover plate glass and the display screen through a tensile testing machine, simulates the structural integrity of the screen after repeated bending, evaluates the bending resistance of the curved screen and tests the deformation or performance attenuation of the screen under extreme conditions in an environmental test chamber. The function compatibility detection unit detects the response speed and accuracy of multi-point touch of the screen through a touch tester, verifies the unlocking success rate of the fingerprint sensor under the screen, and detects the identification accuracy of hierarchical touch for a screen supporting pressure sensing.

5. The flexible large curved screen adhesion quality detection system according to claim 4, characterized in that, The detection standards of the system for various parameters of the product are as follows: The type identification device detects the curvature radius of the product curved surface, and different curvature radius corresponds to different product type; The position detection device calculates the deviation between the actual fitting position and the design position through image recognition algorithm, and the detection standards include that the X / Y / Z axis offset of the cover glass display screen is ≤0.1mm, the rotation angle deviation is ≤0.5°, and the fitting area coverage is ≥99.5%; The curved surface compatibility detection device detects the VA ink area edge definition under the blue 45° annular light based on the visual system, the contrast is ≥50:1, the AA area display uniformity under white backlight is ≤5%, and if the imaging effect under any light source does not meet the standard, it is determined that the curved surface compatibility is insufficient. 6.The flexible large curved screen quality detection system according to claim 5, characterized in that, The detection standards of the comprehensive performance verification device for various parameters of the product are as follows: The fitting accuracy detection unit has the following detection content standards: Edge margin accuracy, CG and panel edge gap ≤0.05mm; Camera hole deviation ≤0.03mm; Curved surface fitting gap uniformity, maximum gap-minimum gap ≤0.08mm; The optical performance detection unit has the following detection content standards: Transmittance, AA area ≥92%, VA area ≤5%; Color difference, ΔE ≤1.5, meeting the sRGB color gamut standard; Luminance uniformity, center and edge luminance ratio ≥90%; The structure stability detection unit has the following detection content standards: Peel strength, CG to Panel adhesion ≥ 5 N ; Bending resistance, 10 million times of bending without delamination under a curvature radius of 1.5mm; High temperature and humidity resistance, no deformation under 85℃ / 85%RH environment for 48 hours; The function compatibility detection unit has the following detection content standards: Touch sensitivity, 10-point touch response time ≤50ms; Fingerprint recognition rate, recognition success rate ≥98% under dry hand / wet hand conditions; 3D touch depth detection, pressure sensing level identification error ≤0.05mm.

7. A flexible large curved screen adhesion quality detection method, characterized in that, The flexible large curved surface screen fitting quality detection system based on any one of claims 1-6 is used to realize accurate detection of the fitting quality of the flexible large curved surface screen, and to reduce the false detection rate and the missed detection rate.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the flexible large curved surface screen fitting quality detection method as claimed in claim 7.

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