A flexible large curved screen adhesion quality detection system and method, and a storage medium

Abstract

The application provides a flexible large curved screen adhesion quality detection system, method and 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, a defective product marking device and a mechanical arm device. The model identification device identifies the product model based on the comparison of product size parameters and BOM; the position detection device detects the initial adhesion position of the product; the curved surface compatibility detection device detects the curved surface compatibility of the product; the comprehensive performance verification device detects the adhesion accuracy, optical performance, structural stability and functional compatibility of the product; the defective product marking device marks the product according to the defect type; and the mechanical arm device clamps and adjusts the position of the product. Through the multi-stage detection process, the system sequentially performs model identification, position detection, curved surface compatibility detection and comprehensive performance verification, can accurately detect the adhesion quality of the flexible large curved screen, reduces the false detection rate and the missed detection rate, and improves the product quality control level.

Description

Technical Field

[0001] This invention belongs to the field of screen assembly quality control technology, specifically relating to a flexible large curved screen bonding quality inspection system, method and storage medium. Background Technology

[0002] With the rapid development of the consumer electronics market, flexible 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 mainstream mobile phone brands have launched models equipped with curved screens to meet consumers' pursuit of a high-quality display experience. However, the bonding quality of flexible curved screens directly affects the final product's display effect, structural stability, and user experience. Therefore, precision testing and quality control during the bonding process have become crucial aspects of the manufacturing process.

[0003] Existing bonding quality inspection technologies primarily employ a combination of single-source lighting and a fixed curvature inspection platform, which has numerous limitations and shortcomings, specifically:

[0004] 1. Insufficient compatibility

[0005] Current inspection systems are primarily designed for specific curvatures (such as 2.5D or hyperboloids) and are difficult to integrate with complex screen shapes such as quad-curved or irregularly shaped screens. For example, when inspecting a quad-curved screen, traditional ring light sources cannot uniformly cover all curved areas, resulting in blurred images at the edges. This necessitates frequent changes to inspection fixtures or parameter adjustments, increasing production costs and time.

[0006] 2. Imaging effect and detection accuracy issues

[0007] Single light sources (such as pure white backlight) are prone to glare or shadows in curved screen inspection, especially at the transition between the AA area (effective display area) and the VA area (border ink area), resulting in low imaging contrast and large errors in the detection of key parameters such as edge distance accuracy and hole position. According to statistics, the false detection rate of traditional systems in curved screen inspection can reach 15%, and the false negative rate can reach 8%.

[0008] 3. Inefficient and inefficient testing process.

[0009] The existing inspection process lacks a tiered mechanism, and all parameters (such as basic dimensions, edge accuracy, and optical performance) are inspected at once, resulting in:

[0010] Waste of resources: Low-risk parameters (such as basic size) and high-risk parameters (such as touch sensitivity) are detected together, taking up the same amount of time;

[0011] Risk masking: High-risk issues may be masked by low-level testing. For example, partial screen adhesive failure may not be detected in the early stages of testing and may only be exposed during the final functional test.

[0012] 4. Poor adaptability to light sources

[0013] Screens made of different materials (such as CPI film and ultra-thin glass) and surface treatment processes (such as AG frosted and AF anti-fingerprint) have significantly different light source reflection characteristics. Traditional light sources cannot be dynamically adjusted, resulting in large fluctuations in the imaging effect of different products on the same testing platform and unstable yield. Summary of the Invention

[0014] To address the shortcomings of existing technologies, this application proposes a highly efficient, accurate, and compatible solution. This solution utilizes an innovative light source combination lighting method (blue 45° ring light + white backlight), a multi-level testing process design (first-level basic parameter testing → second-level curved surface compatibility testing → third-level comprehensive performance verification), and intelligent testing parameter management to achieve accurate testing of the bonding quality of flexible curved screens. This improves testing compatibility to over 90%, reduces the false detection rate to below 3%, and shortens the single-piece testing time by 30%, thereby meeting the stringent quality control requirements of high-end consumer electronics products.

[0015] The technical solution adopted in this invention is as follows:

[0016] A flexible curved screen bonding quality inspection system is provided, including a main control unit, a model identification device, a position detection device, a surface compatibility detection device, a comprehensive performance verification device, a defect marking device, and a robotic arm device electrically connected to the main control unit. The model identification device identifies the product model by comparing the product's dimensional parameters with the product's Bill of Materials (BOM). The position detection device detects the initial bonding position of the product. The surface compatibility detection device detects the surface compatibility of the product. The comprehensive performance verification device detects the product's bonding accuracy, optical performance, structural stability, and functional compatibility. The defect marking device classifies and marks the product based on different defect types. The robotic arm device clamps and adjusts the position of the product.

[0017] Preferably, the main control device controls the robotic arm device to be normally open, and controls the model identification device, position detection device, surface compatibility detection device, comprehensive performance verification device, and defect marking device to be normally closed.

[0018] Furthermore, after the flexible curved screen is laminated, the system controls the robotic arm to place the product to be inspected (such as the finished product after CG and Panel lamination) at the initial inspection position. The system then activates the model recognition device, which uses image recognition technology to detect the product's size parameters and identify the product's model. Different models have different inspection parameter standards. Next, the system activates the position detection device to inspect the initial lamination position. If it meets the standard (i.e., the product position is within the allowable range), a secondary inspection is triggered, and the robotic arm moves the product to the secondary inspection position. Otherwise, the system controls the robotic arm to adjust the product's position or size and repeats the primary inspection until the conditions are met. Finally, the system activates the surface compatibility inspection device, which uses a vision system (first using a blue 45° ring light to locate the VA ink area). Next, a detailed photograph of the product is taken using a white backlight (positioning area AA) to evaluate the imaging effect of the product under different types of light sources (blue 45° ring light + white backlight) to verify surface compatibility. If the surface compatibility does not meet the standard, it is marked as a defective product using a defective product marking device. Otherwise, the system controls a robotic arm to move the product to the third-level inspection position. The system then controls the activation of a comprehensive performance verification device to test the product's bonding accuracy, optical performance, structural stability, and functional compatibility. If all of these meet the standard, the comprehensive performance is considered satisfactory, and the long-term stability is good. The product passes the inspection and enters the next production stage or is packaged and shipped. Conversely, if any test fails to meet the standard, it is marked as a defective product using a defective product marking device. The marked product is then repaired or scrapped, and the problem is recorded to optimize subsequent production processes.

[0019] Furthermore, the comprehensive performance verification device comprises a bonding accuracy detection unit, an optical performance detection unit, a structural stability detection unit, and a functional compatibility detection unit. The bonding accuracy detection unit detects the margin error around the perimeter of the CG (cover glass) and Panel (display screen) after bonding, the positional deviation and diameter of screen openings (such as cameras and fingerprint recognition holes), and the uniformity of gaps in the curved bonding area. The optical performance detection unit detects the light transmittance of different areas of the screen, the deviation of the screen's displayed colors from standard values, and the brightness difference between the screen's center and edges. The structural stability detection unit uses a tensile testing machine to detect the bonding strength between the CG and Panel, simulates the structural integrity after repeated bending of the screen, evaluates the bending resistance of the curved screen, and tests the screen's deformation or performance degradation under extreme conditions in an environmental test chamber. The functional compatibility detection unit uses a touch tester to detect the response speed and accuracy of multi-touch on the screen, verifies the unlocking success rate of the fingerprint sensor under the screen, and, for screens supporting pressure sensing, detects the recognition accuracy of layered touch. It should be noted that the test content standards of the comprehensive performance verification device are based on the industry standards for bonding processes of flexible large curved surface products (such as GB / T 36643-2018 "Technical Specification for Touch Screen Cover Glass").

[0020] Preferably, the specific testing standards for various product parameters by the system are as follows: The model identification device is activated to detect the curvature radius of the product surface, based on different curvature radii corresponding to different product models (e.g., 2.5D screen: R3000-5000mm; quad-curved screen: R2000-3000mm); The position detection device calculates the deviation between the actual bonding position and the designed position through an image recognition algorithm. The detection standards include the X / Y / Z axis offset of CG (cover glass) and Panel (display screen) ≤0.1mm, the rotation angle deviation ≤0.5°, and the bonding area coverage ≥99.5%; The surface compatibility detection device uses a vision system to detect the edge clarity of the VA ink area under blue 45° ring light, the contrast ratio ≥50:1, and the display uniformity of the AA area under white backlight, with a brightness difference ≤5%. If the imaging effect is substandard under any light source (e.g., the ink area is blurry or displays dark spots), it is determined that the surface compatibility is insufficient.

[0021] Furthermore, the comprehensive performance verification device specifies the following testing standards for various product parameters: The bonding accuracy testing unit uses a laser profilometer or high-precision vision system for measurement; exceeding the tolerance indicates poor bonding. The testing standards are as follows: edge distance accuracy: gap between CG and Panel edges ≤ 0.05mm; concentricity of circular holes: camera hole deviation ≤ 0.03mm; uniformity of curved surface bonding gap: maximum gap - minimum gap ≤ 0.08mm. The optical performance testing unit uses a spectrophotometer and luminance meter for measurement; any parameter failing to meet the standard indicates an optical defect. The testing standards are as follows: transmittance: AA area ≥ 92%, VA area ≤ 5%; color difference: ΔE ≤ 1.5, conforming to the sRGB color gamut standard; brightness uniformity: center to edge brightness ratio ≥ 90%. The structural stability testing unit verifies through a tensile testing machine, bending testing machine, and environmental test chamber; failure in any test indicates structural instability. The testing standards are as follows: peel strength: CG to Panel adhesion ≥ 5N / ; Bending resistance: no delamination after 100,000 bends with a curvature radius of 1.5mm; High temperature and humidity resistance: no deformation after 48 hours in an environment of 85℃ / 85%RH; Functional compatibility testing unit is verified using a touch tester and fingerprint simulation device. If the functional parameters do not meet the standards, it is judged as insufficient compatibility. The testing standards are as follows: Touch sensitivity: 10-point touch response time ≤50ms; Fingerprint recognition rate: recognition success rate ≥98% under dry / wet hand conditions; 3D touch depth detection: pressure sensing layer recognition error ≤0.05mm.

[0022] The present invention also provides a method for detecting the bonding quality of flexible curved screens, which is based on the above-mentioned flexible curved screen bonding quality detection system. This method is used to accurately detect the bonding quality of flexible curved screens, reduce the false detection rate and the missed detection rate, and improve product quality control.

[0023] The present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the aforementioned flexible large curved screen bonding quality detection method.

[0024] The beneficial effects of this invention are:

[0025] 1. Improved compatibility: The combination of blue 45° ring light and white backlight effectively supports flexible curved screens of various shapes, such as 2.5D curved, double-curved, and quad-curved, reducing the deviation in imaging effect caused by differences in screen shape.

[0026] 2. Optimize imaging effect and detection accuracy: By complementing different types of light sources, improve the imaging clarity of key parts such as screen edges and curved transition areas, reduce the alarm rate of equipment, and reduce false detection and missed detection.

[0027] 3. Multi-level testing process design: Design a multi-level testing process with primary, secondary, and tertiary levels, clearly defining the parameter ranges and risk levels for each level to ensure efficient utilization of testing resources and comprehensiveness of test results. Simultaneously, through logical relationship design, ensure the rigor and reliability of the testing process.

[0028] In summary, the present invention provides an efficient, accurate, and highly compatible solution for the bonding quality inspection of flexible curved screens, which helps to improve the overall quality and market competitiveness of consumer electronics products. Attached Figure Description

[0029] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a flowchart of the flexible large curved screen bonding quality detection method in this invention;

[0031] Figure 2 This is a schematic diagram of the flexible large curved screen bonding quality detection system of the present invention;

[0032] Figure 3 This is a schematic diagram of the comprehensive performance verification device in this invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] Example 1

[0035] A flexible curved screen bonding quality inspection system, see reference. Figure 2 The system includes a main control unit, a model identification unit, a position detection unit, a curved surface compatibility testing unit, a comprehensive performance verification unit, a defect marking unit, and a robotic arm unit. All these units are electrically connected to the main control unit and work together to perform comprehensive testing of the bonding quality of the flexible curved screen.

[0036] The main control unit is the core of the entire system, responsible for coordinating the work of various functional modules. It employs a high-performance industrial computer equipped with dedicated testing system software, possessing functions such as data processing, instruction distribution, and result analysis. The main control unit keeps the robotic arm normally open and the model identification device, position detection device, surface compatibility testing device, comprehensive performance verification device, and defect marking device normally closed, ensuring that the system performs each testing task in an orderly manner according to the preset procedures during the testing process.

[0037] The model identification device is equipped with a high-definition industrial camera and image processing unit. It identifies the product model by comparing the product's dimensional parameters with the product's Bill of Materials (BOM). This device can also detect the radius of curvature of the product's surfaces. Different radii of curvature correspond to different product models; for example, the radius of curvature for a 2.5D screen is R3000-5000mm, and for a four-curved screen it is R2000-3000mm. By accurately measuring the product's geometric features and comparing them with standard parameters in a database, the model identification device determines the specific product model, providing a parameter basis for subsequent testing.

[0038] The position detection device is equipped with a precision positioning system and position sensors to detect the initial bonding position of the product. The device uses image recognition algorithms to calculate the deviation between the actual bonding position and the designed position. Detection standards include an X / Y / Z axis offset of no more than 0.1mm between the CG (cover glass) and the Panel (display screen), a rotation angle deviation of no more than 0.5°, and a bonding area coverage of no less than 99.5%. The position detection device can monitor the product's position on the detection platform in real time, ensuring the accuracy and stability of the product's position during the detection process.

[0039] The curved surface compatibility testing device is equipped with a multi-source illumination system and high-precision imaging equipment to test the curved surface compatibility of products. Based on a vision system, the device tests the edge sharpness of the VA ink area under blue 45° ring light, with a contrast ratio of no less than 50:1, and the uniformity of the AA area under white backlight, with a brightness difference not exceeding 5%. If the imaging effect fails to meet the standards under any light source, such as blurred ink areas or dark spots, the curved surface compatibility is deemed insufficient. The curved surface compatibility testing device comprehensively evaluates the display effect and visual performance of products in practical applications by simulating lighting conditions under different usage environments.

[0040] See Figure 3 The comprehensive performance verification device consists of a bonding accuracy testing unit, an optical performance testing unit, a structural stability testing unit, and a functional compatibility testing unit. It is used to test the bonding accuracy, optical performance, structural stability, and functional compatibility of products.

[0041] The bonding accuracy detection unit uses a laser profilometer or high-precision vision system to measure the edge distance error, screen opening position deviation and diameter, and gap uniformity of the curved bonding area after the CG and Panel are bonded. The detection standards include: edge distance accuracy (the gap between the CG and Panel edges does not exceed 0.05mm); circular hole concentricity (the camera hole deviation does not exceed 0.03mm); and curved bonding gap uniformity (the difference between the maximum and minimum gaps does not exceed 0.08mm). Any deviation exceeding these limits indicates poor bonding.

[0042] The optical performance testing unit uses a spectrophotometer and a luminance meter to measure the transmittance of different areas of the screen, the deviation of the screen's displayed colors from standard values, and the brightness difference between the center and edges of the screen. Testing standards include: transmittance (AA area not less than 92%, VA area not more than 5%); color difference (ΔE not exceeding 1.5, conforming to the sRGB color gamut standard); and brightness uniformity (center to edge brightness ratio not less than 90%). Failure to meet any of these parameters constitutes an optical defect.

[0043] The structural stability testing unit is validated using a tensile testing machine, a bending testing machine, and an environmental test chamber. The tensile testing machine measures the bond strength between the CG and the panel, simulates repeated bending of the screen to assess its structural integrity, and evaluates the bending resistance of the curved screen. The environmental test chamber tests the screen's deformation or performance degradation under extreme conditions. Testing standards include: peel strength, with the CG-panel bond strength not less than 5 N / m². ; Bending resistance: no delamination after 100,000 bends with a curvature radius of 1.5mm; High temperature and humidity resistance: no deformation after 48 hours in an environment of 85℃ / 85%RH. Failure of any test indicates structural instability.

[0044] The functional compatibility testing unit uses a touch tester and a fingerprint simulator for verification. The touch tester checks the response speed and accuracy of multi-touch on the screen, verifies the unlocking success rate of the fingerprint sensor under the screen, and, for screens supporting pressure sensing, tests the recognition accuracy of layered touch. Testing standards include: touch sensitivity (10-point touch response time no more than 50ms); fingerprint recognition rate (success rate no less than 98% under dry / wet hand conditions); and 3D touch depth detection (pressure sensing layered recognition error no more than 0.05mm). Failure to meet these functional parameters indicates insufficient compatibility.

[0045] The defect marking device is equipped with an automatic marking system and a classification management unit, which classifies and marks products based on different defect types. This device can accurately mark non-conforming products according to the inspection results, facilitating subsequent repair or scrapping. The defect marking device uses a non-damaging marking method, ensuring that the marking process does not cause any additional damage to the products.

[0046] The robotic arm device is equipped with a multi-jointed industrial robotic arm and precision gripping tools for gripping and positioning products. The robotic arm device features high-precision positioning capabilities and flexible movement trajectories, enabling it to accurately place products at various inspection stations according to inspection requirements and make corresponding adjustments or transfers based on the inspection results.

[0047] After the flexible curved screen is laminated, the system inspection process is as follows: The system controls the robotic arm to place the product to be inspected (such as the finished product after CG and Panel lamination) at the initial inspection position; the system controls the model recognition device to activate, and uses image recognition technology to detect the product's size parameters and identify the product's model. Different models have different inspection parameter standards; then the system controls the position detection device to activate, and detects the initial lamination position. If it meets the standard (i.e., the product position is within the allowable range), a secondary inspection is triggered, and the robotic arm moves the product to the secondary inspection position. Otherwise, the system controls the robotic arm to adjust the product's position or size and repeats the primary inspection until the conditions are met; the system controls the curved surface compatibility detection device to activate, and uses a vision system (first using a blue 45° ring light to position the VA ink) to detect the product's size. In the designated area (AA zone), detailed photographs are taken of the product using white backlighting to evaluate its imaging effect under different light sources (blue 45° ring light + white backlight) to verify surface compatibility. If the surface compatibility does not meet the standard, the product is marked as defective using a defective marking device. Otherwise, the system controls a robotic arm to move the product to the third-level inspection position. The system then controls the activation of the comprehensive performance verification device to test the product's bonding accuracy, optical performance, structural stability, and functional compatibility. If all of these meet the standard, the comprehensive performance is considered satisfactory, and the product demonstrates good long-term stability. The product passes the inspection and proceeds to the next production stage or is packaged and shipped. Conversely, if any test fails to meet the standard, the product is marked as defective using a defective marking device. Marked products are then repaired or scrapped, and the issues are recorded to optimize subsequent production processes.

[0048] The testing standards of the comprehensive performance verification device are based on industry standards for the bonding process of flexible curved screen products (such as GB / T 36643-2018 "Technical Specification for Touch Screen Cover Glass"), ensuring the authority and reliability of the test results. Through this series of rigorous testing procedures, the system can comprehensively evaluate the bonding quality of flexible curved screens, effectively identify and mark various defects, and improve product qualification rate and production efficiency.

[0049] Example 2

[0050] A method for detecting the bonding quality of flexible curved screens is provided, based on the flexible curved screen bonding quality detection system described in Embodiment 1. This method is used to accurately detect the bonding quality of flexible curved screens, reduce false detection rate and missed detection rate, and improve product quality control.

[0051] 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:

[0052] Step 1: Product Placement

[0053] 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.

[0054] Step 2: Model Identification

[0055] 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.

[0056] Step 3: Position Detection

[0057] 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.

[0058] Step 4: Surface Compatibility Test

[0059] 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.

[0060] Step 5: Comprehensive Performance Verification

[0061] The main control unit activates the comprehensive performance verification device to test the product's bonding accuracy, optical performance, structural stability, and functional compatibility.

[0062] 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.

[0063] Optical performance testing: Spectrophotometers and luminance meters are used to measure the transmittance of different areas of the screen, the deviation of the screen's displayed colors from standard values, and the brightness difference between the center and edges of the screen.

[0064] Structural stability testing: The bonding strength between CG and Panel is tested using a tensile testing machine, the structural integrity is simulated after repeated bending of the screen, the bending resistance of the curved screen is evaluated, and the deformation or performance degradation of the screen under extreme conditions is tested in an environmental test chamber.

[0065] Functional compatibility testing: The response speed and accuracy of multi-touch on the screen are tested using a touch tester; the unlocking success rate of the fingerprint sensor under the screen is verified; and for screens that support pressure sensing, the recognition accuracy of layered touch is tested.

[0066] Step Six: Result Determination and Processing

[0067] If all tests in the comprehensive performance verification meet the standards, that is, the comprehensive performance meets the standards and the long-term stability is good, then the product is deemed to have passed the test and can proceed to the next production stage or be packaged and shipped; if any test fails to meet the standards, the product is marked as defective using a defect marking device, and the marked product is repaired or scrapped, and the problem is recorded to optimize the subsequent production process.

[0068] The above-mentioned testing methods can comprehensively evaluate the bonding quality of flexible curved screens, enabling precise control over product quality. This method utilizes various advanced testing technologies and stringent testing standards to effectively identify various potential defects, significantly reducing false positive and false negative rates, improving product quality and production efficiency, and providing reliable quality assurance for the large-scale production of flexible curved screens.

[0069] Example 3

[0070] A computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a method for detecting the bonding quality of a flexible, large-curved screen. The computer-readable storage medium can be any medium capable of storing program code, such as a read-only memory (ROM), random access memory (RAM), optical disc, USB flash drive, portable hard drive, or flash memory card.

[0071] When executed by a processor, the computer program implements the flexible curved screen bonding quality detection method described in Embodiment 2. Specifically, the computer program includes program code for performing steps such as product placement, model identification, position detection, curved surface compatibility detection, comprehensive performance verification, and result judgment and processing.

[0072] In this embodiment, when the computer program is executed by the processor, it can control the main control device, model identification device, position detection device, curved surface compatibility detection device, comprehensive performance verification device, defect marking device and robotic arm device described in Embodiment 1 to work together to achieve accurate detection of the bonding quality of the flexible curved screen.

[0073] The algorithm modules in the computer program include an image recognition module, a position deviation calculation module, a surface compatibility evaluation module, and a comprehensive performance analysis module. These modules correspond to the detection steps described in Embodiment 2. The processor executes the corresponding program code to complete various detection tasks, ultimately achieving a comprehensive evaluation of the bonding quality of the flexible curved screen.

[0074] In a preferred embodiment, the computer-readable storage medium further includes a database module for data storage, which stores standard parameters, historical test data, and defect type libraries for various products, providing a reference for the testing process and enabling the optimization of testing algorithms through data analysis to improve testing accuracy.

[0075] By implementing the bonding quality inspection method of flexible curved screens into a computer program and storing it on a computer-readable storage medium, the inspection process can be made more standardized and automated, reducing human interference, improving inspection efficiency and accuracy, and providing reliable quality assurance for the large-scale production of flexible curved screens.

[0076] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible large curved screen bonding quality inspection system, characterized in that, include: The main control unit, the model identification device electrically connected to the main control unit, the position detection device, the surface compatibility detection device, the comprehensive performance verification device, the defect marking device, and the robotic arm device; The model identification device identifies the product model by comparing the product's size parameters with the product's bill of materials; The position detection device is used to detect the initial bonding position of the product; The surface compatibility testing device is used to test the surface compatibility of the product. The comprehensive performance verification device is used to test the product's bonding accuracy, optical performance, structural stability, and functional compatibility. The defect marking device classifies and marks products based on different defect types; The robotic arm device is used to clamp and adjust the position of the product; After the flexible curved screen is bonded, the system controls the robotic arm to place the product to be inspected at the initial inspection position; The system controls the model identification device to activate, and uses image recognition technology to detect the product's size parameters and identify the product's model. Then, the control position detection device is turned on to detect the initial fitting position. If it meets the standard, the secondary detection is triggered, and the control robot arm is used to move the product to the secondary detection position. Otherwise, the system controls the robot arm to adjust the product position or size and repeat the primary detection until the conditions are met. The system controls the surface compatibility detection device to start, and takes detailed pictures of the product based on the vision system to evaluate the imaging effect of the product under different types of light sources in order to verify the surface compatibility. If the surface compatibility does not meet the standard, it is marked as a defective product by the defective product marking device. Otherwise, the system controls the robotic arm to move the product to the third-level detection position. The system controls the comprehensive performance verification device to start, and tests the product's bonding accuracy, optical performance, structural stability and functional compatibility. If all of them meet the standards, the product passes the test and enters the next production stage or is packaged and shipped. Otherwise, if any test fails to meet the standard, the product is marked as defective by the defect marking device. The marked product is then repaired or scrapped.

2. The flexible large curved screen bonding quality inspection system according to claim 1, characterized in that, The main control device controls the robotic arm device to be normally open, and controls the model identification device, position detection device, surface compatibility detection device, comprehensive performance verification device, and defective product marking device to be normally closed.

3. The flexible large curved screen bonding quality inspection system according to claim 2, characterized in that, The comprehensive performance verification device consists of a bonding accuracy detection unit, an optical performance detection unit, a structural stability detection unit, and a functional compatibility detection unit. The bonding accuracy detection unit is used to detect the edge distance error around the cover glass and the display screen after they are bonded together, the position deviation and diameter of the screen opening, and the uniformity of the gap in the curved bonding area. The optical performance detection unit 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 structural stability testing unit uses a tensile testing machine to test the bonding strength between the cover glass and the display screen, simulate the structural integrity of the screen after repeated bending, evaluate the bending resistance of the curved screen, and test the deformation or performance degradation of the screen under extreme conditions in an environmental test chamber. The functional compatibility testing unit uses a touch tester to test the response speed and accuracy of multi-touch on the screen, verify the unlocking success rate of the fingerprint sensor under the screen, and, for screens that support pressure sensing, test the recognition accuracy of layered touch.

4. The flexible large curved screen bonding quality inspection system according to claim 3, characterized in that, The specific testing standards for various parameters of the product by the system are as follows: The model identification device is activated to detect the radius of curvature of the product surface, and different product models are corresponding to different radii of curvature; The position detection device calculates the deviation between the actual bonding position and the designed position using an image recognition algorithm. The detection standards include X / Y / Z axis offset of the cover glass display screen ≤ 0.1mm, rotation angle deviation ≤ 0.5°, and bonding area coverage ≥ 99.5%. The curved surface compatibility testing device uses a vision system to detect the edge clarity of the VA ink area under blue 45° ring light, with a contrast ratio ≥50:1, and the display uniformity of the AA area under white backlight, with a brightness difference ≤5%. If the imaging effect does not meet the standards under any light source, it is judged as insufficient curved surface compatibility.

5. The flexible large curved screen bonding quality inspection system according to claim 4, characterized in that, The specific testing standards for various parameters of the product by the comprehensive performance verification device are as follows: The testing standards for the bonding accuracy testing unit are as follows: Margin accuracy: the gap between the CG and the panel edge is ≤0.05mm; Concentricity of the circular holes, camera hole deviation ≤ 0.03mm; Uniformity of curved surface fitting gap: maximum gap - minimum gap ≤ 0.08mm; The testing standards for the optical performance testing unit are as follows: Light transmittance: AA area ≥ 92%, VA area ≤ 5%; Color difference, ΔE≤1.5, conforms to sRGB color gamut standard; Brightness uniformity, with a center-to-edge brightness ratio ≥90%; The testing standards for the structural stability testing unit are as follows: Peel strength, CG to Panel adhesion ≥5N / ; It exhibits excellent bending resistance, remaining intact after 100,000 bends with a curvature radius of 1.5mm. High temperature and high humidity resistance; no deformation after 48 hours at 85℃ / 85%RH. The testing standards for the functional compatibility testing unit are as follows: Touch sensitivity, 10-point touch response time ≤50ms; Fingerprint recognition rate, success rate ≥98% under dry / wet hand conditions; 3D touch depth detection, pressure sensing layer recognition error ≤0.05mm.

6. A method for detecting the bonding quality of a flexible curved screen, characterized in that, The system is based on any one of the flexible curved screen bonding quality detection systems described in claims 1-5, and is used to accurately detect the bonding quality of flexible curved screens, thereby reducing the false detection rate and the missed detection rate.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the flexible curved screen bonding quality detection method as described in claim 6.

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