Visual detection device and method for lamination bubble defects of flexible OLED display screen

Abstract

The invention relates to the technical field of OLED display screens, in particular to a flexible OLED display screen lamination bubble defect visual detection device and method.The flexible OLED display screen lamination bubble defect visual detection device comprises a workbench and a translation assembly arranged on the workbench, a movable plate is connected to the translation assembly, a supporting plate is fixed to the movable plate, and a detector is fixed to the supporting plate; the negative pressure air pumping mechanism is arranged on the supporting plate, the supporting plate is further provided with a purging assembly, the purging assembly comprises an air supply nozzle, and the negative pressure air pumping mechanism can perform purging treatment on the display screen through the purging assembly and the air supply nozzle; the angle adjusting mechanism is arranged on the purging assembly, the air supply nozzle is provided with a conduction regulation and control assembly, through cooperation of the angle adjusting mechanism and the conduction regulation and control assembly, necking and pressurization can be conducted when airflow purges the display screen, so that the purging effect is enhanced, chambering treatment is conducted when the airflow is separated from the display screen, and therefore the display screen can be effectively purged. And the suspended dust is blown away.

Description

Technical Field

[0001] This invention relates to the field of OLED display technology, specifically to a visual inspection device and method for detecting bubble defects in flexible OLED display bonding. Background Technology

[0002] Flexible OLED displays are a display technology that uses flexible substrates (such as polyimide PI). They are characterized by being flexible, thin, and having high contrast, and are widely used in foldable phones, wearable devices, and other fields.

[0003] The bonding process of flexible OLED displays is more complex than that of traditional rigid screens, requiring a balance between flexibility and high precision. In the bonding process of flexible OLED displays, bubble detection and handling are key quality control steps. Since bubbles can affect the propagation of light, if bubbles are generated during the bonding process, they will inevitably damage the uniformity of the image when the display is in use.

[0004] Therefore, visual inspection of the display screen is required after bonding to detect whether air bubbles are generated. However, in existing visual inspection, dust may adhere to the surface of the display screen, which will scatter light during optical inspection, forming bright or dark spots similar to air bubbles. This will inevitably affect the accuracy of the inspection results.

[0005] To address this, a blowing assembly can be used to blow away dust from the display screen before visual inspection. The airflow is continuously blown towards the display surface at an angle, which can blow away the dust adhering to the display surface and ensure that the visual inspection results are not affected by dust interference. However, during the blowing process, after the dust is detached from the display screen by the airflow, some dust is moved to one side by the wind force to detach from the display screen. But after the wind blows on the display screen, the air will deflect at a certain angle, causing some dust to move upward and become suspended above the display screen. When the blowing assembly is removed, the dust falls back onto the display screen under the action of gravity, forming false defects in the visual inspection and affecting the inspection results. Summary of the Invention

[0006] The purpose of this invention is to provide a visual inspection device and method for defects in the bonding of flexible OLED displays, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A visual inspection device for bubble defects in flexible OLED display bonding includes:

[0009] A workbench, and a translation assembly disposed on the workbench, a movable plate connected to the translation assembly, a support plate fixed on the movable plate, and a detector for visual inspection fixed on the support plate;

[0010] Also includes:

[0011] A negative pressure pumping mechanism is provided on the support plate, and a purging assembly is also provided on the support plate. The purging assembly includes an air nozzle, and the negative pressure pumping mechanism can perform purging treatment on the display screen through the purging assembly and the air nozzle.

[0012] An angle adjustment mechanism is provided on the purging assembly, and a conduction control component is provided on the air delivery nozzle. The angle adjustment mechanism can adjust the purging angle of the air delivery nozzle, and the conduction control component can adjust the air delivery pressure of the air delivery nozzle.

[0013] As a further aspect of the present invention: the negative pressure pump mechanism includes a negative pressure pipe fixed on the support plate, an air intake nozzle connected to the negative pressure pipe, and a filter screen fixed inside the negative pressure pipe;

[0014] It also includes a suction assembly disposed on the support plate for adjusting the pressure inside the negative pressure tube.

[0015] As a further embodiment of the present invention: the suction assembly includes a pump cylinder fixed on the support plate, a cylinder fixed on the pump cylinder, and a suction pipe connected to the negative pressure pipe.

[0016] As a further embodiment of the present invention: the suction assembly further includes a piston disc that is slidably and sealed within the pump cylinder, a movable rod that passes through the pump cylinder is fixed on the piston disc, and a push plate that is fixedly connected to the telescopic end of the cylinder is fixed at the end of the movable rod.

[0017] As a further embodiment of the present invention: the purging assembly includes a fixing plate fixed on the support plate, a rotating rod fixedly connected to the air delivery nozzle is rotatably mounted on the fixing plate, and an air delivery pipe connected to the air delivery nozzle is connected to the pump cylinder.

[0018] As a further embodiment of the present invention: the angle adjustment mechanism includes a corrugated plate fixed on the worktable, a support sleeve that slides axially on the rotating rod, and a limiting wheel that abuts against the corrugated plate is fixed at the end of the support sleeve;

[0019] It also includes a follower assembly disposed on the fixed plate for driving the rotating rod to rotate.

[0020] As a further embodiment of the present invention: the follower component includes a guide groove formed on the outer circumference of the rotating rod, and a limiting block is fixed on the inner wall of the support sleeve to slide and engage with the guide groove.

[0021] As a further embodiment of the present invention: the follower assembly further includes a first support column fixed on the fixed plate, the first support column having a guide plate slidably connected to the support sleeve along its axial direction, the support sleeve having a follower plate that abuts against the guide plate along its axial direction, and springs being sleeved on the support sleeve and the rotating rod, the two ends of the springs abutting against the fixed plate and the follower plate respectively.

[0022] As a further embodiment of the present invention: the conduction control component includes a second support column fixed on the air nozzle and passing through the follower plate, a conduction plate is slidably installed at the end of the air nozzle, and a connecting rod hinged to the conduction plate is hinged to the follower plate.

[0023] A visual inspection method for bubble defects in flexible OLED display bonding includes the following steps:

[0024] Step 1: Place the display screen to be tested on the worktable;

[0025] Step 2: Control the movement of the movable plate and support plate through the translation component to drive the movement of the negative pressure air pump mechanism. Under the action of the negative pressure air pump mechanism, the dust on the display screen is adsorbed, and the air nozzle is controlled by the blowing component to blow the display screen.

[0026] Step 3: After the display screen is cleaned, a visual inspection can be performed on the display screen using a detector;

[0027] Step 4: The purging assembly will also drive the angle adjustment mechanism and the conduction control assembly to move, so as to adjust the purging angle of the air nozzle and simultaneously change the purging intensity.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: This application can achieve comprehensive cleaning of dust adhering to the display screen by adjusting the angle and conduction size of the air nozzle, so as to ensure the accuracy of subsequent visual inspection. When the air nozzle is at the lowest tilt angle, the air outlet area of ​​the air nozzle is the smallest, and the air speed is the fastest under the premise of constant pressure, which enhances the local impact force and efficiently removes stubborn dust. When the air nozzle is rotated upward, the air outlet area of ​​the air nozzle gradually increases to improve the blowing range, thereby blowing away the dust floating in the air and preventing more dust from falling back onto the display screen, thus improving the cleaning effect.

[0029] By using the bidirectional suction pump of the pump cylinder, after the air delivery nozzle is cleaned once, the suction nozzle performs a second negative pressure cleaning, eliminating some of the dust that falls back down and completely removing dust from the surface of the flexible OLED display and the suspended dust. This effectively prevents dust from forming false defects in visual inspection and significantly improves the accuracy of bubble defect detection. Attached Figure Description

[0030] Figure 1 A schematic diagram of an embodiment of a visual inspection device for bubble defects in flexible OLED displays.

[0031] Figure 2 A schematic diagram of the structure from the first angle in an embodiment of a visual inspection device for bubble defects in flexible OLED displays.

[0032] Figure 3 This is a schematic diagram of the second angle of a visual inspection device for bubble defects in flexible OLED displays.

[0033] Figure 4 A schematic diagram of the structure of some negative pressure pump mechanism and translation component in an embodiment of a visual inspection device for bubble defects in flexible OLED display bonding.

[0034] Figure 5 This is a schematic diagram showing the connection relationship between part of the negative pressure pump mechanism, part of the angle adjustment mechanism, and the conduction control component in an embodiment of a visual inspection device for bonding bubble defects to a flexible OLED display.

[0035] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point A in the middle.

[0036] Figure 7 This is a schematic diagram of the structure of a portion of the negative pressure pump mechanism, detector, and angle adjustment mechanism in an embodiment of a visual inspection device for bubble defects in flexible OLED displays.

[0037] Figure 8 A partial cross-sectional schematic diagram of a visual inspection device for bubble defects in flexible OLED displays.

[0038] Figure 9 This is a schematic diagram of the structure of some angle adjustment mechanisms and conduction control components in an embodiment of a visual inspection device for bubble defects in flexible OLED displays.

[0039] Figure 10 A schematic diagram of part of the negative pressure pump mechanism in an embodiment of a visual inspection device for bubble defects in flexible OLED display bonding.

[0040] Figure 11This is a schematic diagram of the structure of some angle adjustment mechanisms and some conduction control components in an embodiment of a visual inspection device for bonding bubble defects to a flexible OLED display.

[0041] Figure 12 This is an exploded structural diagram of some angle adjustment mechanisms and conduction control components in an embodiment of a visual inspection device for bonding bubble defects to a flexible OLED display.

[0042] Figure 13 for Figure 12 Enlarged schematic diagram of the structure at point B.

[0043] Figure 14 A schematic diagram of the air nozzle in the narrowed state in an embodiment of a visual inspection device for bonding air bubbles to a flexible OLED display.

[0044] In the diagram: 1. Workbench; 2. Motor; 3. Lead screw; 4. Threaded sleeve; 5. Guide column; 6. Guide sleeve; 7. Movable plate; 8. Support plate; 9. Corrugated plate; 10. Pump cylinder; 11. Cylinder; 12. Push plate; 13. Movable rod; 14. Piston disc; 15. Suction pipe; 16. Negative pressure pipe; 17. Filter screen; 18. Suction nozzle; 19. Fixed plate; 20. Rotating rod; 2001. First straight groove; 2002. Spiral groove; 2003. Second straight groove; 21. Air nozzle; 22. Air supply pipe; 23. Guide plate; 24. Detector; 25. Support sleeve; 2501. Limit block; 26. Limit wheel; 27. First support column; 28. Guide plate; 29. ​​Follower plate; 30. Second support column; 31. Connecting rod; 32. Spring. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0047] Please see Figures 1 to 14 In this embodiment of the invention, the visual inspection device for bubble defects in flexible OLED display bonding includes:

[0048] The worktable 1 and the translation assembly disposed on the worktable 1 are provided. The translation assembly is connected to the movable plate 7, the movable plate 7 is fixed to the support plate 8, and the support plate 8 is fixed to the detector 24 for visual inspection. The translation assembly includes a motor 2 fixed on the worktable 1, a lead screw 3 rotatably mounted on the worktable 1 and connected to the output shaft of the motor 2, a threaded sleeve 4 threadedly connected to the lead screw 3, and symmetrically arranged guide columns 5 fixed on the worktable 1. The guide column 5 is axially slidably connected to the guide sleeve 6, and the guide sleeve 6 and the threaded sleeve 4 are fixedly connected to the movable plate 7.

[0049] Also includes:

[0050] A negative pressure air pump mechanism is provided on the support plate 8. The support plate 8 is also provided with a purging assembly. The purging assembly includes an air nozzle 21. The negative pressure air pump mechanism can perform purging treatment on the display screen through the purging assembly and the air nozzle 21.

[0051] An angle adjustment mechanism is provided on the purging assembly, and a conduction control component is provided on the air nozzle 21. The angle adjustment mechanism can adjust the purging angle of the air nozzle 21, and the air pressure delivered by the air nozzle 21 can be adjusted by the conduction control component.

[0052] Specifically, when the display screen is placed on the workbench 1, the translation component controls the negative pressure pump mechanism to move smoothly along the length of the display screen. The negative pressure pump mechanism pumps gas into the air nozzle 21 through the purging component, and the display screen is purged through the air nozzle 21. The negative pressure pump mechanism also drives the angle adjustment mechanism to move, and the air delivery angle of the air nozzle 21 is continuously changed under the action of the angle adjustment mechanism. At the same time, under the action of the conduction control component, the conduction range of the air nozzle 21 is adjusted according to the air delivery angle of the air nozzle 21. When the air nozzle 21 is at the lowest tilt angle, the air outlet area of ​​the air nozzle 21 is the smallest. Under the premise of constant pressure, the speed of the blown gas is the fastest, which enhances the local impact force and effectively removes stubborn dust. When the air nozzle 21 rotates upward, the air outlet area of ​​the air nozzle 21 gradually increases to increase the blowing range, thereby blowing away the dust floating in the air and preventing more dust from falling back onto the display screen, thus improving the cleaning effect.

[0053] The negative pressure pump mechanism can perform a second negative pressure cleaning on the suction nozzle 18 after the air delivery nozzle 21 has been cleaned once. This eliminates some of the dust that falls back down, and to a certain extent, thoroughly removes the dust on the surface of the flexible OLED display and the suspended dust. This effectively prevents dust from forming false defects in visual inspection and significantly improves the accuracy of bubble defect detection.

[0054] Please see Figures 1-5, Figure 7 , Figure 8 , Figure 10 The negative pressure pump mechanism includes a negative pressure pipe 16 fixed on the support plate 8, a suction nozzle 18 connected to the negative pressure pipe 16, and a filter screen 17 fixed inside the negative pressure pipe 16. It also includes a suction assembly mounted on the support plate 8 for adjusting the pressure inside the negative pressure pipe 16. The suction assembly includes a pump cylinder 10 fixed on the support plate 8, a cylinder 11 fixed on the pump cylinder 10, and a suction pipe 15 connected to the negative pressure pipe 16. The suction assembly also includes a piston disc 14 slidably and sealingly installed inside the pump cylinder 10, a movable rod 13 fixed on the piston disc 14 that penetrates the pump cylinder 10, and a push plate 12 fixedly connected to the telescopic end of the cylinder 11 at the end of the movable rod 13.

[0055] Please see Figures 1-3 , Figure 5 , Figure 8 The purging assembly includes a fixing plate 19 fixed on the support plate 8, a rotating rod 20 fixedly connected to the air nozzle 21 and rotatably mounted on the fixing plate 19, and an air delivery pipe 22 connected to the air nozzle 21 and connected to the pump cylinder 10.

[0056] Please see Figure 8In detail, when cleaning the display screen, to ensure that no dust remains on the screen, negative pressure suction and positive pressure blowing are used in combination to achieve the best cleaning effect. To this end, the piston disc 14 divides the pump cylinder 10 into two cavities, both of which can absorb and pump air. The pump cylinder 10 is equipped with four one-way valves, two of which are connected to the suction pipe 15, and the other two are connected to the delivery pipe 22. Under the action of the one-way valves, gas can only enter the pump cylinder 10 through the suction pipe 15 and then exit through the delivery pipe 22. Initially, the piston disc 14 is located at the end of its stroke on one side of the pump cylinder 10, maximizing the insertion size of the movable rod 13 into the pump cylinder 10, so that the push plate 12 is located at the end of its stroke facing the pump cylinder 10. When the cylinder 11 works, the push plate 12 drives the movable rod 13 to move, thereby driving the piston disc 14 to move synchronously. Under the action of the piston disc 14... The volume of one cavity gradually decreases, allowing air from that cavity to be delivered to the air nozzle 21 via the air supply pipe 22 for initial cleaning of the display screen. The volume of the other cavity gradually increases, creating a negative pressure. Under this negative pressure, air from the negative pressure pipe 16 is drawn into the cavity through the suction pipe 15. Simultaneously, the negative pressure pipe 16 draws in outside air through the suction nozzle 18. During the suction process at the suction nozzle 18, suction is generated to draw dust remaining on the display screen into the negative pressure pipe 16. The filter 17 inside the negative pressure pipe 16 filters the air to prevent dust from entering the pump cylinder 10. When the volumes of the two cavities are interchanged, it indicates that the piston disc 14 has reached the end of its stroke. At this point, the cylinder 11 controls the piston disc 14 to reset and resumes pumping and suction to achieve a dual process of absorbing and cleaning dust from the display screen.

[0057] Preferably, the bidirectional suction and pumping of the pump cylinder 10 can continuously perform dual processing of absorption and blowing on the dust on the display screen. This ensures the accuracy of the detection results when the detector 24 is used for detection. At the same time, the filter 17 ensures that the air entering the pump cylinder 10 does not contain impurities, thereby avoiding the problem of dust adhering to the display screen due to impurities during the pumping process. The detector 24 is a visual detector used to visually detect bubble defects generated during the bonding of the display screen. This is an application of the prior art and will not be described in detail in this application.

[0058] Please see Figures 1-6 , Figure 8 , Figure 9 , Figures 11-13The angle adjustment mechanism includes a corrugated plate 9 fixed on the worktable 1, a support sleeve 25 slidably attached to the rotating rod 20, and a limiting wheel 26 fixed at the end of the support sleeve 25 to abut against the corrugated plate 9; it also includes a follower assembly disposed on the fixed plate 19 for driving the rotating rod 20 to rotate, the follower assembly including a guide groove formed on the outer circumference of the rotating rod 20, a limiting block 2501 fixed on the inner wall of the support sleeve 25 to slide and engage with the guide groove, the follower assembly including a first support column 27 fixed on the fixed plate 19, a guide plate 28 fixedly connected to the support sleeve 25 slidably attached to the first support column 27 slidably attached to the first support column 27 slidably attached to the first support column 27 slidably attached to the first support sleeve 27 slidably attached to the first support sleeve 25 ... second support sleeve 25 slidably attached to the first support sleeve 25 slidably attached to the second support sleeve 25 slidably attached to the second support sleeve 25 slidably attached to the second support sleeve 25 slidably attached to the second support sleeve 25 slidably attached to the second support sleeve 25

[0059] Please see Figure 5 , Figure 8 , Figure 9 , Figure 11 , Figure 12 The conduction control component includes a second support column 30 fixed on the air nozzle 21 and passing through the follower plate 29. A guide plate 23 is slidably installed at the end of the air nozzle 21. A connecting rod 31 hinged to the guide plate 23 is hinged on the follower plate 29.

[0060] Please see Figure 13 Furthermore, the guide plate 23 is provided with a through groove that communicates with the air nozzle 21. The corrugated plate 9 is arranged in a wave shape. The guide groove can be divided into three sections, namely the first straight groove 2001, the spiral groove 2002, and the second straight groove 2003. The first straight groove 2001, the spiral groove 2002, and the second straight groove 2003 are connected to each other in sequence.

[0061] When the spring 32 is in a pre-compressed state, and the limiting wheel 26 is in the most concave position of the corrugated plate 9, the follower plate 29 is at the end of its stroke away from the fixed plate 19. The distance between the follower plate 29 and the fixed plate 19 is less than the elongation of the spring 32 in its natural state. Therefore, the spring 32 always provides the follower plate 29 with a force away from the fixed plate 19, thereby controlling the guide plate 28 to be at the end of its stroke away from the fixed plate 19 through the follower plate 29. At this time, the size of the support sleeve 25 and the rotating rod 20 is the smallest. The limiting block 2501 is at the end of its stroke on the side of the first straight groove 2001 away from the spiral groove 2002. The limiting wheel 26 and the concave position of the corrugated plate 9 are in a contact state. Under the action of the limiting block 2501 and the first straight groove 2001, the air delivery direction of the air nozzle 21 is controlled towards the surface of the display screen through the rotating rod 20.

[0062] Please see Figure 14 Under the action of the follower plate 29, the connecting rod 31 controls the guide plate 23 to be located at the end of the stroke facing the display screen, so that the conduction size between the through groove and the air nozzle 21 is minimized, so that the air nozzle 21 is in a constricted state.

[0063] When the surface of the display screen needs to be treated, the motor 2 works and drives the lead screw 3 to rotate, thereby driving the threaded sleeve 4 to move. The threaded sleeve 4 will drive the guide sleeve 6 to move along the length direction of the guide post 5 through the movable plate 7. The guide sleeve 6 and the guide post 5 have a guiding function, so that the threaded sleeve 4 can only move along the length direction of the lead screw 3 and will not rotate with the lead screw 3, thereby ensuring that the movable plate 7 will not deviate during movement. The movable plate 7 will drive the air nozzle 21 to move along the required blowing direction of the display screen through the support plate 8, and under the action of the negative pressure pumping mechanism, continuously pump gas into the air nozzle 21. Since the air nozzle 21 is in a constricted state at this time and the air delivery direction is towards the display screen, the airflow is pressurized and blown to the surface of the display screen, which can enhance the blowing force on the display screen, enhance the local impact force, and efficiently remove stubborn dust.

[0064] During the blowing process, dust may be suspended above the display screen due to airflow. To address this, as the air nozzle 21 moves, the limiting wheel 26 will move along the trajectory of the corrugated plate 9. When the limiting wheel 26 disengages from the recessed position of the corrugated plate 9 and gradually moves towards the protruding position, it will drive the support sleeve 25 to move towards the fixed plate 19. This causes the size of the support sleeve 25 fitting onto the rotating rod 20 to gradually increase, thereby causing the limiting block 2501 to slide along the first straight groove 2001. At the same time, the support sleeve 25 will also drive the guide plate 28 to move along the length direction of the first support column 27. Under the action of the guide plate 28 and the first support column 27, it can be ensured that the support sleeve 25 will not rotate during movement. The guide plate 28 will also drive the follower plate 29 to move along the length direction of the second support column 30, thereby adjusting the position of the guide plate 23 through the connecting rod 31, so that the connection size between the through groove and the air nozzle 21 is increased, so as to flare the air nozzle 21. The follower plate 29 will also compress the spring 32.

[0065] Subsequently, when the limiting block 2501 disengages from the first straight groove 2001 and enters the spiral groove 2002, the rotating rod 20 will rotate and drive the air nozzle 21 to move, causing the angle between the air delivery direction of the air nozzle 21 and the display screen to gradually increase. When the limiting block 2501 disengages from the spiral groove 2002 and enters the second straight groove 2003, the angle between the air nozzle 21 and the display screen reaches its maximum. The limiting block 2501 continues to move until it reaches the end of the stroke of the second straight groove 2003. At this time, the limiting wheel 26 moves to the most protruding position of the corrugated plate 9, and the conduction size between the through groove and the air nozzle 21 is at its maximum, so that the flare size of the air nozzle 21 reaches its maximum and the airflow purging range reaches its maximum. The airflow blown by the air nozzle 21 can blow the dust suspended above the display screen away from the display screen to prevent the dust from falling back onto the display screen surface and affecting the test results.

[0066] The limiting wheel 26 continues to move toward the recessed position of the corrugated plate 9. The spring 32 is released elastically, causing the follower plate 29, guide plate 28, and support sleeve 25 to move toward the initial position. Under the action of the limiting block 2501 and the guide groove, the air nozzle 21 is controlled to blow gas toward the display screen again. At the same time, the guide plate 23 can be controlled to reset so that the air nozzle 21 can be re-pressurized and narrowed. The above steps are repeated to achieve comprehensive treatment of dust adhering to the display screen.

[0067] Preferably, by adjusting the air delivery angle of the air delivery nozzle 21, the conduction size of the air delivery nozzle 21 can be adjusted synchronously and adaptively. This allows the air delivery nozzle 21 to automatically adjust the airflow by both constriction and pressure increase and expansion and diffusion according to the blowing angle. In this way, the blowing force of the airflow can be enhanced when blowing the display screen, and the dust suspended above the display screen due to the blowing can be blown away from the display screen area. This ensures that the detection results of the subsequent visual inspection of the display screen surface by the detector 24 will not have errors.

[0068] A visual inspection method for bubble defects in flexible OLED display bonding includes the following steps:

[0069] Step 1: Place the display screen to be tested on workbench 1;

[0070] Step 2: Control the movement of the movable plate 7 and the support plate 8 through the translation component to drive the movement of the negative pressure pump mechanism. Under the action of the negative pressure pump mechanism, the dust on the display screen is adsorbed, and the air nozzle 21 is controlled by the blowing component to blow the display screen.

[0071] Step 3: After the display screen is cleaned, a visual inspection can be performed on the display screen using detector 24;

[0072] Step 4: The purging assembly will also drive the angle adjustment mechanism and the conduction control assembly to move, so as to adjust the purging angle of the air nozzle 21 and simultaneously change the purging intensity.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A visual inspection device for bubble defects in flexible OLED display bonding, comprising: A workbench, and a translation assembly disposed on the workbench, a movable plate connected to the translation assembly, a support plate fixed on the movable plate, and a detector for visual inspection fixed on the support plate; Its characteristic is that it further includes: A negative pressure pumping mechanism is provided on the support plate, and a purging assembly is also provided on the support plate. The purging assembly includes an air nozzle, and the negative pressure pumping mechanism can perform purging treatment on the display screen through the purging assembly and the air nozzle. An angle adjustment mechanism is provided on the purging assembly, and a conduction control component is provided on the air delivery nozzle. The angle adjustment mechanism can adjust the purging angle of the air delivery nozzle, and the conduction control component can adjust the air delivery pressure of the air delivery nozzle.

2. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 1, characterized in that, The negative pressure pump mechanism includes a negative pressure pipe fixed on the support plate, an air intake nozzle connected to the negative pressure pipe, and a filter screen fixed inside the negative pressure pipe. It also includes a suction assembly disposed on the support plate for adjusting the pressure inside the negative pressure tube.

3. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 2, characterized in that, The suction assembly includes a pump cylinder fixed on the support plate, a cylinder fixed on the pump cylinder, and a suction pipe connected to the negative pressure pipe.

4. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 3, characterized in that, The suction assembly also includes a piston disc that is slidably and sealed inside the pump cylinder. A movable rod that passes through the pump cylinder is fixed on the piston disc, and a push plate that is fixedly connected to the telescopic end of the cylinder is fixed at the end of the movable rod.

5. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 3, characterized in that, The purging assembly includes a fixed plate fixed to the support plate, a rotating rod fixedly connected to the air delivery nozzle is rotatably mounted on the fixed plate, and an air delivery pipe connected to the air delivery nozzle is connected to the pump cylinder.

6. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 5, characterized in that, The angle adjustment mechanism includes a corrugated plate fixed on the worktable, a support sleeve that slides axially on the rotating rod, and a limiting wheel that abuts against the corrugated plate is fixed at the end of the support sleeve. It also includes a follower assembly disposed on the fixed plate for driving the rotating rod to rotate.

7. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 6, characterized in that, The follower assembly includes a guide groove formed on the outer circumference of the rotating rod, and a limiting block that slides and engages with the guide groove is fixed on the inner wall of the support sleeve.

8. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 6, characterized in that, The follower assembly further includes a first support column fixed on the fixed plate, the first support column having an axially sliding guide plate fixedly connected to the support sleeve, the support sleeve having an axially sliding follower plate that abuts against the guide plate, and springs being sleeved on the support sleeve and the rotating rod, with the two ends of the springs abutting against the fixed plate and the follower plate respectively.

9. The visual inspection device for bonding bubble defects in flexible OLED displays according to claim 8, characterized in that, The conduction control component includes a second support column fixed on the air nozzle and passing through the follower plate. A conduction plate is slidably installed at the end of the air nozzle, and a connecting rod hinged to the follower plate is hinged to the conduction plate.

10. A method for visually inspecting bonding bubble defects in flexible OLED displays, comprising the visual inspection device for bonding bubble defects in flexible OLED displays as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Place the display screen to be tested on the worktable; Step 2: Control the movement of the movable plate and support plate through the translation component to drive the movement of the negative pressure air pump mechanism. Under the action of the negative pressure air pump mechanism, the dust on the display screen is adsorbed, and the air nozzle is controlled by the blowing component to blow the display screen. Step 3: After the display screen is cleaned, a visual inspection can be performed on the display screen using a detector; Step 4: The purging assembly will also drive the angle adjustment mechanism and the conduction control assembly to move, so as to adjust the purging angle of the air nozzle and simultaneously change the purging intensity.

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