Multifunctional screen detection device and detection method thereof

Abstract

The present application relates to screen quality inspection technical field, especially in kind of multi-functional screen detection equipment and its detection method, its detection equipment includes frame module, man-machine interaction module and main control analysis module, man-machine interaction module, main control analysis module fixed installation is in frame module, still includes sealed light-proof detection mechanism, multi-station revolution revolution stable posture mechanism, self-adapting clamping mistake proofing mechanism, fixed point thimble conductive mechanism, multi-dimension optical detection module and environment compensation calibration module.The present application is suitable for various LCD, OLED display screen large-scale high-precision quality inspection scene, solves the traditional equipment light interference, screen posture deviation, unstable conduction, high false rejection rate, the core problem of insufficient beat, has the advantages of novel structure, strong stability, high detection precision, high automation degree.

Description

Technical Field

[0001] This invention relates to the field of screen quality inspection technology, and in particular to a multifunctional screen inspection device and its inspection method. Background Technology

[0002] As the core display component of mobile phones, tablets, automotive displays, and industrial intelligent control devices, the appearance integrity and display performance of the display directly determine the product quality and user experience. During the mass production process of screens, defects such as dead pixels, screen light leakage, uneven color, image retention, and minor scratches are easily generated due to the influence of manufacturing processes. Therefore, high-precision and high-stability automated testing is the core process for screen mass production and delivery.

[0003] Existing mass-produced screen inspection equipment is mostly based on an open assembly line inspection structure, which has several inherent technical defects: First, the open inspection environment cannot isolate natural light, stray lighting, and dust interference from the workshop, resulting in poor optical inspection accuracy and a high risk of false positives and false negatives, failing to meet the high-precision quality inspection requirements of high-end screens; Second, traditional single-station inspection equipment can only inspect one screen at a time, resulting in low inspection cycle and poor mass production efficiency, making it unsuitable for large-scale assembly line production needs; Third, conventional rotary inspection equipment is prone to screen angular shifts and tilts during station switching, leading to image acquisition deviations and defect recognition failures, and lacks a posture compensation structure, resulting in poor inspection consistency; Fourth, the existing inspection equipment has an unreasonable conduction structure, often resulting in contact with the front and sides of the screen, easily damaging the screen display area, and failing to accurately match the industry-standard process of bottom contact conduction for mass production of screens, resulting in poor conduction stability and easy contact failure; Fifth, traditional equipment lacks functions such as placement error prevention, airtight light protection, and dynamic environmental compensation, making it easy for screens to be installed backwards or improperly, and minor environmental interference cannot be eliminated, resulting in insufficient long-term mass production stability.

[0004] In summary, existing technologies lack an integrated high-precision testing device that can achieve sealed, light-proof, and dust-proof operation, continuous multi-station operation, automatic screen posture compensation, precise and non-invasive bottom conduction, and dynamic environmental calibration. It is difficult to balance mass production efficiency and testing accuracy, and optimization and improvement are urgently needed. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a multifunctional screen detection device and its detection method.

[0006] The technical solution of the present invention: On one hand, the present invention proposes a multi-functional screen testing device, including a rack module, a human-computer interaction module and a main control analysis module. The human-computer interaction module and the main control analysis module are fixedly installed on the rack module. It also includes a sealed light-shielding testing mechanism, a multi-station revolution and rotation posture stabilization mechanism, an adaptive clamping error prevention mechanism, a fixed-point pin conductive mechanism, a multi-dimensional optical testing module and an environmental compensation calibration module. The rack module is set as a chassis, with a test chamber formed inside the chassis. The bottom of the chassis has an opening for loading and unloading that communicates with the test chamber. The side of the chassis has a hinged door that can be sealed and closed. The human-machine interaction module includes a control panel located on the door. The multi-station revolution and rotation attitude stabilization mechanism includes a bracket fixed to the inner wall of the detection chamber and a disc rotatably mounted on the bracket. The disc is axially arranged in the horizontal direction, and several placement slots are opened in a ring array on the circumference of the disc. Each placement slot is rotatably mounted with an axially horizontal turntable. The inner wall of the machine is provided with a drive mechanism for driving the disc to rotate. The adaptive clamping error prevention mechanism includes several U-shaped frames that can be detachably installed on the corresponding turntable. The U-shaped frame consists of a horizontal section and two spaced-apart support arms that are perpendicularly connected to the horizontal section. The two support arms are provided with support plates for supporting the screen on their inner sides. The inner side of the U-shaped frame is provided with pressure sensors for detecting when the screen is placed in place. The fixed-point pin conductive mechanism includes a guide frame, a clamping component, and a conductive component fixed inside the box door and located at the testing station. The clamping component is used to horizontally clamp and position the screen at the testing station. The conductive component is located on the clamping component and can be raised and lowered vertically. It is used to abut against the reserved test contact on the bottom surface of the screen from the bottom of the screen to achieve non-invasive power-on lighting. The multi-dimensional optical inspection module includes a high-precision imaging camera located at the top of the inspection chamber. The high-precision imaging camera is a 20-megapixel global shutter industrial color camera, used to capture high-definition images from top to bottom for full-area display on the screen. The environmental compensation calibration module includes a temperature sensor, a light sensor, a vibration detection sensor, and a data compensation chip arranged in the testing chamber. It is used to collect the environmental parameters inside the sealed testing chamber in real time and complete dynamic data calibration compensation. The main control and analysis module is electrically linked with the drive mechanism, pressure sensor, clamping component, conductive component, multi-dimensional optical detection module, and environmental compensation and calibration module to realize equipment timing control, precise screen illumination, image acquisition, environmental error compensation, defect identification and classification, and data storage and output.

[0007] Preferably, the door is equipped with hinges and a latch lock. The door is hinged to the chassis via the hinges, and after the door is closed, it is locked and fixed to the chassis via the latch lock. The door and the chassis form a sealed fit, making the testing chamber a sealed, light-proof, and dustproof cavity.

[0008] Preferably, a positioning pin is fixed on the turntable and is coaxial with it. The positioning pin passes through the horizontal part of the U-shaped frame and extends to the concave side of the U-shaped frame. The U-shaped frame is locked and fixed to the turntable by bolts, so as to realize the detachable and interchangeable adaptation to screens of different sizes.

[0009] Preferably, the pressure sensor is fixedly installed at the end of the positioning pin located on the concave side of the U-shaped frame, and the detection end of the pressure sensor is horizontally facing the screen placement area for contact sensing with the end of the screen.

[0010] Preferably, an installation shaft is fixedly provided on the bracket, and the installation shaft is coaxially fixedly connected to the disc. A cylindrical groove is coaxially provided at the end of the disc away from the bracket. A fixed plate coaxial with the disc is fixedly provided on the inner wall of the detection chamber. The end of the fixed plate is inserted into the cylindrical groove, and the outer arc surface of the fixed plate and the inner arc surface of the cylindrical groove are rotated and sealed to achieve a sealed cavity that prevents dust and light.

[0011] Preferably, the drive mechanism includes a servo motor with a built-in encoder, gear A, and gear B. The servo motor is fixed on the bracket, and the output shaft of the servo motor is coaxially connected to the mounting shaft to drive the disc to rotate intermittently, so that each placement slot is switched to the detection station in sequence. The number of gears A is the same as the number of turntables and they are respectively fixed coaxially to the support shaft of the corresponding turntable. Gear B is fixed coaxially to the fixed disk. Each gear A meshes with gear B, and gears A and B have the same number of teeth. When the disc revolves, gear A revolves around gear B and rotates on its own axis, so that the turntable drives the U-shaped frame and the screen to rotate synchronously to compensate, and always keep the screen's posture horizontal.

[0012] Preferably, the clamping component includes a guide frame, a push plate, and a servo electric cylinder A. The guide frame is vertically fixed to the inner end face of the door. A guide rod is slidably mounted on the guide frame. The push plate is fixed to the end of the guide rod and located between the disc and the guide frame. The servo electric cylinder A is fixed on the guide frame. The output shaft of the servo electric cylinder A is hinged to the push plate and is used to drive the push plate to move horizontally, thereby achieving adaptive clamping and positioning of the screen.

[0013] Preferably, the conductive component includes a support base, a slider, a conductive contact, and a servo electric cylinder B. The support base is fixed to one end of the push plate near the disk. The support base has a guide groove along the height direction. The slider is slidably assembled in the guide groove. The conductive contact is detachably installed on the upper surface of the slider by a snap-fit, adapting to different screen contact position changes. The servo electric cylinder B is fixed to the bottom of the support base. The output shaft of the servo electric cylinder B is hinged to the bottom surface of the slider. In the retracted state, the conductive contact is lower than the bottom surface of the screen. In the extended state, the conductive contact is vertically lifted to abut against the test contact on the bottom surface of the screen to complete the energization.

[0014] Preferably, the chassis is equipped with a suction cup robot arm, which is arranged corresponding to the pick-up and drop-off port at the bottom of the chassis, for automating the loading, unloading and transfer of screens.

[0015] On the other hand, the present invention proposes a multifunctional screen detection method, applied to the aforementioned screen detection device, the detection method comprising the following steps: S1. Equipment Sealed Self-Test Calibration: After the equipment is powered on, the cabinet door is closed and the latch is locked to form a sealed, light-proof and dust-proof environment in the testing chamber. The environmental compensation calibration module collects the initial temperature, residual light, and equipment vibration parameters in the testing chamber, completes the zero-point calibration of the sensor, and generates environmental compensation reference parameters. S2. Automated loading and placement: The suction cup robot moves the screen to be tested through the pick-and-place port and places it on the support plate of the empty U-shaped frame, with the front of the screen facing up and the bottom contact point facing down. The pressure sensor is attached to the end of the screen to complete the placement and detection. S3, Stable rotation of workstation switching: The servo motor drives the disc to revolve intermittently. During the rotation of the disc, gear A meshes with the fixed gear B and rotates, driving the turntable and screen to rotate synchronously to compensate. The screen maintains a horizontal posture throughout the rotation of the disc, and accurately rotates to switch to the inspection workstation. S4. Precise positioning and bottom conduction: After the testing station is in place, the servo electric cylinder A drives the push plate to move horizontally and clamp the screen to complete the precise positioning; then the servo electric cylinder B drives the slider and conductive contact to rise vertically, so that the conductive contact can non-invasively abut against the test PAD contact point reserved on the bottom surface of the screen to complete the circuit conduction. S5, Multi-screen High-definition Light-Avoiding Detection: The main control analysis module controls the screen to light up line by line from bottom to top, and sequentially switches between pure white, pure black, red, green and blue standard detection screens. The sealed detection chamber isolates external stray light interference, and a 20-megapixel global shutter industrial camera instantly exposes and captures a ripple-free high-definition image of the entire screen area from top to bottom. S6. Dynamic Environmental Compensation and Defect Analysis: The data compensation chip performs dynamic error compensation on image data and optical parameters based on real-time environmental parameters in the testing room, eliminating interference from trace temperature and vibration in the testing room; the main control analysis module compares the standard image and the image under test pixel by pixel through the image difference comparison algorithm, accurately identifying defects such as bad spots, bright spots, dark spots, light leakage, color difference, afterimages, and scratches, and completing the defect level classification judgment. S7. Power-off Reset and Cyclic Operation: After a single screen is tested, the conductive contact descends to reset and disconnect the circuit. The clamping part releases the screen and resets. The disc continues to rotate to switch the next screen to be tested to the testing station. At the same time, the suction cup robot completes the unloading of the tested screen and the loading of the new screen, realizing continuous cyclic automated testing, real-time storage of test data and output of quality inspection results.

[0016] Preferably, in step S5, the switching interval between each standard screen is 2 to 3 seconds, the global shutter camera instantaneously synchronizes exposure and captures images, there are no screen refresh ripples or motion blur, and the time to complete the acquisition of a single-screen multi-view full-coverage image is ≤15 seconds.

[0017] Preferably, in step S6, the environmental dynamic compensation includes closed cavity temperature drift compensation, residual dim light compensation, and turntable rotation vibration displacement compensation, which controls the detection data error within ±1%, and the overall screen detection accuracy is ≥99.5%.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: This invention features a novel sealed, light-proof, and dust-proof detection chamber structure that completely isolates the chamber from stray light, dust, and airflow interference. It addresses the industry pain points of traditional open-type detection, such as poor accuracy and high false positive and false negative rates, from a hardware perspective. Combined with an internal environment dynamic compensation algorithm, it achieves dual anti-interference detection, controlling the detection error within ±1% and achieving a detection accuracy of ≥99.5%. By setting up a synchronous attitude compensation mechanism for revolution and rotation, and through the meshing compensation of gears with equal number of teeth, the screen station switching process is made absolutely horizontal and stable, which completely solves the problems of screen tilt, offset and image acquisition failure in traditional turntable detection, and greatly improves the consistency of detection. It adopts a structure with the screen facing upwards and the bottom contact pins providing non-invasive conductivity. It does not touch the screen display surface or sides, eliminating the risk of screen damage. It precisely matches the industry-standard design of the bottom test PAD reserved in the factory of the screen. It has no fictitious structure and is highly adaptable to mass production. It integrates pressure error prevention, self-adaptive clamping, and detachable and interchangeable functions, and can be adapted to LCD and OLED screens of different sizes and types; Multi-station circular intermittent flow operation enables simultaneous staggered loading and unloading, positioning, connection, detection and unloading, without equipment downtime. Single screen detection time is ≤15s, which greatly improves the mass production detection cycle and adapts to the large-scale mass production quality inspection needs. The entire process is automated and closed-loop, with robotic arms for loading and unloading, automatic posture stabilization, automatic clamping, automatic lighting, automatic detection, and automatic grading and archiving. No human intervention is required, the detection standards are uniform, and the errors of human detection are avoided, making it extremely valuable for engineering promotion. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall appearance of the present invention; Figure 2 This is a schematic diagram of the connection structure of the various components inside the chassis. Figure 3 A schematic diagram showing the connection structure of the disc, U-shaped frame, gear A, gear B and servo motor; Figure 4 A schematic diagram showing the connection structure between the turntable, the U-shaped frame, and gear A; Figure 5 This is a schematic diagram of the connection structure of the various components on the guide frame.

[0020] Reference numerals: 1. Chassis; 101. Testing chamber; 102. Pick-up and drop-off port; 2. High-precision imaging camera; 3. Door; 31. Control panel; 32. Hook and loop lock; 4. Bracket; 5. Disc; 51. Placement slot; 52. Cylindrical slot; 6. Servo motor; 7. Turntable; 71. Positioning pin; 8. U-shaped frame; 9. Bolt; 10. Support plate; 11. Pressure sensor; 12. Gear A; 13. Fixed plate; 14. Gear B; 15. Guide frame; 16. Push plate; 17. Servo electric cylinder A; 18. Support base; 19. Slider; 20. Conductive contact; 21. Servo electric cylinder B; 22. Suction cup robot arm. Detailed Implementation

[0021] Example 1, as Figures 1-5 As shown, the present invention proposes a multifunctional screen inspection device, which includes a rack module, a human-computer interaction module, and a main control and analysis module. The human-computer interaction module and the main control and analysis module are fixedly installed on the rack module. It also includes a sealed light-shielding inspection mechanism, a multi-station revolution and rotation posture stabilization mechanism, an adaptive clamping error prevention mechanism, a fixed-point pin conductive mechanism, a multi-dimensional optical inspection module, and an environmental compensation and calibration module.

[0022] The frame module is a chassis 1, with a testing chamber 101 formed inside the chassis 1. A loading / unloading port 102 communicating with the testing chamber 101 is located at the bottom of the chassis 1. A sealable door 3 is hinged to the side of the chassis 1. The human-machine interface module includes a control panel 31 located on the door 3. The door 3 is equipped with hinges and a latch lock 32. The door 3 is hinged to the chassis 1 via the hinges, and after closing, the door 3 is locked and fixed to the chassis 1 via the latch lock 32, forming a sealed fit between the door 3 and the chassis 1, making the testing chamber 101 a sealed, light-proof, and dustproof cavity.

[0023] The chassis 1 is equipped with a suction cup robot 22, which is arranged corresponding to the pick-up and drop-off port 102 at the bottom of the chassis 1, and is used to automatically complete the loading and unloading transfer of the screen.

[0024] The multi-station revolution and rotation attitude stabilization mechanism includes a bracket 4 fixed to the inner wall of the testing chamber 101 and a disc 5 rotatably mounted on the bracket 4. The disc 5 is axially arranged in a horizontal direction, and several placement slots 51 are arranged in a ring array around the disc 5. Each placement slot 51 contains a horizontally mounted axially rotating disc 7. The inner wall of the housing 1 is provided with a drive mechanism for driving the disc 5 to rotate. A mounting shaft is fixedly mounted on the bracket 4 and coaxially fixedly connected to the disc 5. A cylindrical groove 52 is coaxially opened at the end of the disc 5 away from the bracket 4. A fixed plate 13 coaxial with the disc 5 is fixedly mounted on the inner wall of the testing chamber 101. The end of the fixed plate 13 is inserted into the cylindrical groove 52, and the outer arc surface of the fixed plate 13 and the inner arc surface of the cylindrical groove 52 are rotatably sealed to achieve a sealed cavity that prevents dust and light.

[0025] The drive mechanism includes a servo motor 6 with a built-in encoder, gears A12 and B14. The servo motor 6 is fixed to the bracket 4, and its output shaft is coaxially connected to the mounting shaft, driving the disc 5 to rotate intermittently, causing each placement slot 51 to sequentially switch to the detection station. The number of gears A12 is the same as the number of turntables 7, and each gear A12 is coaxially fixed to the support shaft of its corresponding turntable 7. Gear B14 is coaxially fixed to the fixed disk 13. Each gear A12 meshes with gear B14, and gears A12 and B14 have the same number of teeth. When the disc 5 revolves, gear A12 revolves around gear B14 and rotates on its own axis, causing the turntable 7 to drive the U-shaped frame 8 and the screen to rotate synchronously for compensation, always maintaining the screen's horizontal orientation.

[0026] The adaptive clamping error-proof mechanism includes several U-shaped frames 8 detachably mounted on corresponding turntables 7. Specifically, a positioning pin 71 coaxially mounted on the turntable 7 is fixed thereon. The positioning pin 71 passes through the horizontal section of the U-shaped frame 8 and extends to the concave side of the U-shaped frame 8. The U-shaped frame 8 is locked and fixed to the turntable 7 by bolts 9, realizing detachable and adaptable design to different screen sizes. The U-shaped frame 8 consists of a horizontal section and two spaced-apart support arms perpendicularly connected to the horizontal section. Each of the two support arms has a support plate 10 for supporting the screen on its inner side. A pressure sensor 11 for detecting when the screen is placed in position is provided on the inner side of the U-shaped frame 8. The pressure sensor 11 is fixedly mounted at the end of the positioning pin 71 located on the concave side of the U-shaped frame 8. The detection end of the pressure sensor 11 faces horizontally towards the screen placement area for contact sensing with the end of the screen.

[0027] The fixed-point ejector pin conductive mechanism includes a guide frame 15 fixed to the inside of the door 3 and located at the testing station, a clamping component, and a conductive component. The clamping component includes the guide frame 15, a push plate 16, and a servo electric cylinder A17. The guide frame 15 is vertically fixed to the inner end face of the door 3. A guide rod is slidably mounted on the guide frame 15. The push plate 16 is fixed to the end of the guide rod and located between the disc 5 and the guide frame 15. The servo electric cylinder A17 is fixed to the guide frame 15. The output shaft of the servo electric cylinder A17 is hinged to the push plate 16 and is used to drive the push plate 16 to move horizontally, thereby achieving adaptive clamping and positioning of the screen.

[0028] The conductive components include a support base 18, a slider 19, a conductive contact 20, and a servo electric cylinder B21. The support base 18 is fixed to one end of the push plate 16 near the disk 5. The support base 18 has a guide groove along its height direction, and the slider 19 is slidably assembled in the guide groove. The conductive contact 20 is detachably installed on the upper surface of the slider 19 via a snap-fit, adapting to different screen contact position changes. The servo electric cylinder B21 is fixed to the bottom of the support base 18, and the output shaft of the servo electric cylinder B21 is hinged to the bottom surface of the slider 19. In the retracted state, the conductive contact 20 is lower than the bottom surface of the screen. In the extended state, the conductive contact 20 is vertically lifted to abut against the test contact on the bottom surface of the screen to complete the energization.

[0029] The multi-dimensional optical inspection module includes a high-precision imaging camera 2 located at the top of the inspection chamber 101. The high-precision imaging camera 2 is a 20-megapixel global shutter industrial color camera used to acquire high-definition images from top to bottom for full-area display on the screen.

[0030] The environmental compensation calibration module includes a temperature sensor, a light sensor, a vibration detection sensor, and a data compensation chip arranged in the test chamber 101. It is used to collect the internal environmental parameters of the sealed test chamber 101 in real time and complete dynamic data calibration compensation.

[0031] The main control and analysis module is electrically linked with the drive mechanism, pressure sensor 11, clamping parts, conductive parts, multi-dimensional optical detection module, and environmental compensation and calibration module to realize equipment timing control, precise screen lighting, image acquisition, environmental error compensation, defect identification and classification, and data storage and output.

[0032] Example 2: This invention proposes a multifunctional screen detection method, applied to the multifunctional screen detection device described in Example 1, comprising the following steps: S1. Equipment Sealed Self-Test Calibration: After the equipment is powered on, close the cabinet door 3 and lock the latch lock 32 to make the test chamber 101 a sealed, light-proof and dust-proof environment. The environmental compensation calibration module collects the initial temperature, residual light and equipment vibration parameters in the test chamber 101, completes the zero-point calibration of the sensor, and generates environmental compensation reference parameters. S2. Automated loading and placement: The suction cup robot 22 transports the screen to be tested through the pick-and-place port 102 and places it on the support plate 10 of the empty U-shaped frame 8 with the front of the screen facing up and the bottom contact point facing down. The pressure sensor 11 is attached to the end of the screen to complete the placement and detection. S3, Stable rotation of workstation switching: Servo motor 6 drives disk 5 to revolve intermittently. During the rotation of disk 5, gear A12 meshes with fixed gear B14 and rotates, driving turntable 7 and screen to rotate synchronously for compensation. The screen maintains a horizontal posture throughout the rotation of disk 5, and accurately rotates to switch to the inspection workstation. S4. Precise Positioning and Bottom Conductivity: After the testing station is in place, the servo electric cylinder A17 drives the push plate 16 to move horizontally and clamp the screen, completing precise positioning. Subsequently, the servo electric cylinder B21 drives the slider 19 and the conductive contact 20 to rise vertically, so that the conductive contact 20 non-invasively abuts against the reserved test PAD contact on the bottom surface of the screen, completing circuit conduction. S5, Multi-screen High-definition Light-Avoiding Detection: The main control analysis module controls the screen to light up line by line from bottom to top, and sequentially switches between pure white, pure black, red, green and blue standard detection screens. The sealed detection chamber 101 isolates external stray light interference, and the 20-megapixel global shutter industrial camera instantly exposes and captures the entire screen area of ​​high-definition images without ripples from top to bottom. S6. Dynamic Environmental Compensation and Defect Analysis: The data compensation chip dynamically compensates for errors in image data and optical parameters based on real-time environmental parameters within the testing chamber 101, eliminating interference from minute temperature and vibration within the chamber. The main control analysis module uses an image differential comparison algorithm to compare the standard image and the image under test pixel by pixel, accurately identifying defects such as bad spots, bright spots, dark spots, light leaks, color differences, afterimages, and scratches, and completing the defect level classification. S7. Power-off Reset and Cyclic Operation: After a single screen test is completed, the conductive contact 20 descends to reset and disconnect the circuit, the clamping part releases the screen and resets, the disc 5 continues to rotate to switch the next screen to be tested to the test station, and at the same time the suction cup robot 22 completes the unloading of the tested screen and the loading of the new screen, realizing continuous cyclic automated testing, real-time storage of test data and output of quality inspection results.

[0033] In step S5, the interval between switching between the standard images on the screen is 2-3 seconds. The global shutter camera instantaneously synchronizes the exposure and captures images, with no screen refresh ripples or motion blur. The time to complete the image capture of a single screen with full coverage of multiple images is ≤15 seconds.

[0034] In step S6, the environmental dynamic compensation includes closed cavity temperature drift compensation, residual dim light compensation, and turntable rotation vibration displacement compensation, which controls the detection data error within ±1%, and the overall screen detection accuracy is ≥99.5%.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A multifunctional screen inspection device, characterized in that, It includes a rack module, a human-machine interaction module, and a main control and analysis module. The human-machine interaction module and the main control and analysis module are fixedly installed on the rack module. It also includes a sealed light-shielding detection mechanism, a multi-station revolution and rotation attitude stabilization mechanism, an adaptive clamping error prevention mechanism, a fixed-point pin conductive mechanism, a multi-dimensional optical detection module, and an environmental compensation and calibration module. The frame module is set as a chassis (1), and the chassis (1) has a test chamber (101) formed inside. The bottom of the chassis (1) has a pick-up and put-out port (102) that communicates with the test chamber (101). The side of the chassis (1) is hinged with a sealable door (3). The human-machine interaction module includes a control panel (31) set on the door (3). The multi-station revolution and rotation attitude stabilization mechanism includes a bracket (4) fixed to the inner wall of the testing chamber (101) and a disc (5) rotatably mounted on the bracket (4). The disc (5) is axially arranged in the horizontal direction. Several placement slots (51) are opened in a ring array around the disc (5). Each placement slot (51) is rotatably mounted with an axially horizontal turntable (7). The inner wall of the machine box (1) is provided with a drive mechanism for driving the disc (5) to rotate. The adaptive clamping error prevention mechanism includes several U-shaped frames (8) that can be detachably installed on the corresponding turntable (7). The U-shaped frame (8) consists of a horizontal section and two spaced support arms that are perpendicularly connected to the horizontal section. The two support arms are provided with support plates (10) for supporting the screen on their inner sides. The U-shaped frame (8) is provided with pressure sensors (11) for detecting when the screen is placed in position. The fixed-point pin conductive mechanism includes a guide frame (15) fixed inside the box door (3) and located at the testing station, a clamping component and a conductive component. The clamping component is used to horizontally clamp and position the screen of the testing station. The conductive component is set on the clamping component and can be raised and lowered vertically. It is used to abut the reserved test contact on the bottom surface of the screen from the bottom of the screen to achieve non-invasive power-on lighting. The multi-dimensional optical inspection module includes a high-precision imaging camera (2) located at the top of the inspection chamber (101). The high-precision imaging camera (2) is a 20-megapixel global shutter industrial color camera used to capture high-definition images from top to bottom for full-area display on the screen. The environmental compensation calibration module includes a temperature sensor, a light sensor, a vibration detection sensor and a data compensation chip arranged in the test chamber (101), which are used to collect the environmental parameters inside the sealed test chamber (101) in real time and complete dynamic data calibration compensation. The main control analysis module is electrically linked with the drive mechanism, pressure sensor (11), clamping component, conductive component, multi-dimensional optical detection module, and environmental compensation calibration module to realize equipment timing control, precise screen lighting, image acquisition, environmental error compensation, defect identification and classification, and data storage output.

2. The multifunctional screen detection device according to claim 1, characterized in that, The door (3) is equipped with a hinge and a latch lock (32). The door (3) is hinged to the chassis (1) through the hinge. After the door (3) is closed, it is locked and fixed to the chassis (1) through the latch lock (32). The door (3) and the chassis (1) form a sealed fit, so that the testing chamber (101) forms a sealed light-proof and dustproof cavity.

3. The multifunctional screen detection device according to claim 1, characterized in that, A positioning pin (71) is fixed on the turntable (7) and is coaxial with it. The positioning pin (71) passes through the horizontal part of the U-shaped frame (8) and extends to the concave side of the U-shaped frame (8). The U-shaped frame (8) is locked and fixed to the turntable (7) by bolts (9) to realize detachable replacement to adapt to different screen sizes.

4. The multifunctional screen detection device according to claim 3, characterized in that, The pressure sensor (11) is fixedly installed at the end of the positioning pin (71) located on the concave side of the U-shaped frame (8). The detection end of the pressure sensor (11) is horizontally facing the screen placement area for contact sensing with the end of the screen.

5. The multifunctional screen detection device according to claim 1, characterized in that, A mounting shaft is fixedly provided on the bracket (4), and the mounting shaft is coaxially fixedly connected to the disc (5). A cylindrical groove (52) is coaxially provided at one end of the disc (5) away from the bracket (4). A fixed plate (13) coaxial with the disc (5) is fixedly provided on the inner wall of the detection chamber (101). The end of the fixed plate (13) is inserted into the cylindrical groove (52), and the outer arc surface of the fixed plate (13) and the inner arc surface of the cylindrical groove (52) rotate and seal together to achieve a sealed cavity that prevents dust and light.

6. The multifunctional screen detection device according to claim 5, characterized in that, The drive mechanism includes a servo motor (6) with a built-in encoder, gear A (12) and gear B (14). The servo motor (6) is fixed on the bracket (4). The output shaft of the servo motor (6) is coaxially connected to the mounting shaft and is used to drive the disc (5) to rotate intermittently, so that each placement slot (51) is switched to the detection station in sequence. The number of gears A (12) is the same as the number of turntables (7) and they are coaxially fixed with the support shaft of the corresponding turntable (7). Gear B (14) is coaxially fixed with the fixed disk (13). Each gear A (12) meshes with gear B (14), and gears A (12) and gear B (14) have the same number of teeth. When the disc (5) revolves, gear A (12) revolves around gear B (14) and rotates on its own axis, so that the turntable (7) drives the U-shaped frame (8) and the screen to rotate synchronously to compensate for the rotation, and always keep the screen posture horizontal.

7. The multifunctional screen detection device according to claim 1, characterized in that, The clamping components include a guide frame (15), a push plate (16), and a servo electric cylinder A (17). The guide frame (15) is vertically fixed to the inner end face of the door (3). A guide rod is slidably mounted on the guide frame (15). The push plate (16) is fixed to the end of the guide rod and located between the disc (5) and the guide frame (15). The servo electric cylinder A (17) is fixed on the guide frame (15). The output shaft of the servo electric cylinder A (17) is hinged to the push plate (16) to drive the push plate (16) to move horizontally and realize screen adaptive clamping positioning.

8. The multifunctional screen detection device according to claim 7, characterized in that, The conductive components include a support base (18), a slider (19), a conductive contact (20), and a servo electric cylinder B (21). The support base (18) is fixed to one end of the push plate (16) near the disk (5). The support base (18) has a guide groove along the height direction. The slider (19) is slidably assembled in the guide groove. The conductive contact (20) is detachably installed on the upper surface of the slider (19) by a snap fastener to adapt to different screen contact position changes. The servo electric cylinder B (21) is fixed to the bottom of the support base (18). The output shaft of the servo electric cylinder B (21) is hinged to the bottom surface of the slider (19). In the retracted state, the conductive contact (20) is lower than the bottom surface of the screen. In the extended state, the conductive contact (20) is vertically lifted to abut the bottom surface of the screen to complete the power supply.

9. A multifunctional screen detection device according to claim 1, characterized in that, The chassis (1) is equipped with a suction cup robot (22) on the outside. The suction cup robot (22) is arranged in relation to the bottom pick-up and drop-off port (102) of the chassis (1) and is used to automatically complete the loading and unloading transfer of the screen.

10. A multifunctional screen detection method, applied to the detection device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Equipment sealed self-test calibration: After the equipment is powered on, close the box door (3) and lock the latch lock (32) to make the test chamber (101) form a sealed light-proof and dust-proof environment. The environmental compensation calibration module collects the initial temperature, residual light and equipment vibration parameters in the test chamber (101), completes the zero-point calibration of the sensor, and generates environmental compensation reference parameters. S2, Automated loading and placement: The suction cup robot (22) transports the screen to be tested through the pick-and-place port (102) and places it on the support plate (10) of the empty U-shaped frame (8), with the front of the screen facing up and the bottom contact point facing down. The pressure sensor (11) is attached to the end of the screen to complete the placement and detection. S3, Station switching and stable rotation: Servo motor (6) drives disk (5) to revolve intermittently. During the revolve of disk (5), gear A (12) meshes with fixed gear B (14) and rotates, driving the turntable (7) and screen to rotate synchronously and compensate. The screen maintains a horizontal posture throughout the rotation of disk (5) and accurately rotates to the detection station. S4. Precise positioning and bottom conduction: After the test station is in place, the servo electric cylinder A (17) drives the push plate (16) to move horizontally and clamp the screen to complete the precise positioning; then the servo electric cylinder B (21) drives the slider (19) and the conductive contact (20) to rise vertically, so that the conductive contact (20) non-invasively abuts against the reserved test PAD contact on the bottom surface of the screen to complete the circuit conduction; S5, Multi-screen high-definition light-avoidance detection: The main control analysis module controls the screen to light up line by line from bottom to top, and switches between pure white, pure black, red, green and blue standard detection screens in sequence. The sealed detection chamber (101) isolates external stray light interference, and the 20 million pixel global shutter industrial camera instantly exposes and collects the screen's full area of ​​high-definition images without ripples from top to bottom. S6. Environmental dynamic compensation and defect analysis: The data compensation chip performs dynamic error compensation on image data and optical parameters based on real-time environmental parameters in the testing chamber (101) to eliminate minor temperature and vibration interference in the testing chamber (101); The main control analysis module compares the standard image and the image under test pixel by pixel through the image difference comparison algorithm to accurately identify defects such as bad spots, bright spots, dark spots, light leakage, color difference, afterimages, and scratches, and completes the defect level classification judgment. S7. Power-off reset and cyclic operation: After the single screen test is completed, the conductive contact (20) descends to reset and disconnect the circuit, the clamping part releases the screen and resets, the disc (5) continues to rotate to switch the next screen to be tested to the test station, and at the same time the suction cup robot (22) completes the unloading of the tested screen and the loading of the new screen, realizing continuous cyclic automated testing, real-time storage of test data and output of quality inspection results.

11. A multifunctional screen detection method according to claim 10, characterized in that, In step S5, the interval between switching between the standard images on the screen is 2-3 seconds. The global shutter camera instantaneously synchronizes the exposure and captures images, with no screen refresh ripples or motion blur. The time to complete the image capture of a single screen with full coverage of multiple images is ≤15 seconds.

12. A multifunctional screen detection method according to claim 10, characterized in that, In step S6, the environmental dynamic compensation includes closed cavity temperature drift compensation, residual dim light compensation, and turntable rotation vibration displacement compensation, which controls the detection data error within ±1%, and the overall screen detection accuracy is ≥99.5%.

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