OLED flexible screen appearance defect visual inspection device and method

Abstract

The application relates to the technical field of flexible screen detection, in particular to an OLED flexible screen appearance defect visual detection device and method, which comprises two groups of driving assemblies arranged symmetrically, two groups of adsorption devices arranged oppositely arranged at the two ends of the driving assemblies, an elastic traction structure arranged on the driving assembly and connected with the end portions of the adsorption devices, the elastic traction structure can drive the two groups of adsorption devices to move close to each other, and a supporting assembly arranged on the driving assembly, wherein the supporting assembly comprises a pushing structure and a side plate, a guide groove is formed in the side plate, the pushing structure can move in the guide groove, an abutting portion is arranged on the pushing structure, the abutting portion cooperates with the elastic traction structure, the two groups of adsorption devices can be dislocated, the detection integrity is improved, and the edge position detection precision is prevented from being reduced.

Description

Technical Field

[0001] This invention relates to the field of flexible screen inspection technology, specifically to a visual inspection device and method for appearance defects in OLED flexible screens. Background Technology

[0002] OLED flexible screens, with their unique bendable and foldable properties, have been widely used in smartphones, wearable devices, and automotive displays. In the production process of OLED flexible screens, process quality inspection is crucial, requiring the detection of key indicators such as displacement deviation between display layers and the thickness of the colloid between different layered structures. This is typically achieved using optical inspection equipment.

[0003] Although OLED flexible screens are used for display only on one side, in order to ensure the accuracy of the process and the quality of the product, both sides of the screen need to be fully inspected during testing. Currently, common testing equipment uses a clamping mechanism to fix the OLED flexible screen and then tests both sides in turn. However, in actual operation, the clamping mechanism will block some areas when fixing the screen, which will prevent the optical inspection equipment from effectively testing these areas. If there are defects in these blocked areas, they will not be detected, thus directly affecting the quality control of the product. Summary of the Invention

[0004] The purpose of this invention is to provide a visual inspection device and method for appearance defects in OLED flexible screens, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A visual inspection device for appearance defects in OLED flexible screens, including:

[0007] Two sets of driving components are symmetrically arranged, and each end of the driving component is provided with two sets of adsorption devices arranged opposite to each other.

[0008] An elastic traction structure is disposed on the drive assembly and connected to the end of the adsorption device, the elastic traction structure being able to drive the two sets of the adsorption devices to move closer to each other.

[0009] A support component is disposed on the drive component. The support component includes a push structure and a side plate. A guide groove is formed on the side plate. The push structure can move within the guide groove. An abutment part is provided on the push structure. The abutment part cooperates with the elastic traction structure to make the two sets of adsorption devices misaligned.

[0010] As a further aspect of the present invention: the drive assembly includes a connecting plate and a connecting arm rotatably mounted on the connecting plate. A second gear is coaxially fixedly mounted on the rotating shaft of the connecting arm. The second gear meshes with a first gear rotatably mounted on the connecting plate. The first gear is connected to the output shaft of the drive device fixedly mounted on the connecting plate.

[0011] As a further aspect of the present invention, the number of teeth of the first gear is less than the number of teeth of the second gear.

[0012] As a further embodiment of the present invention: the elastic traction structure includes two sets of first inclined grooves symmetrically arranged at one end of the connecting arm and a second grooved wheel rotatably connected to the end of the adsorption device. The second grooved wheel can roll in the first inclined groove, and an abutting wheel is provided at the end of the second grooved wheel away from the adsorption device. The abutting wheel is adapted to the abutting part.

[0013] The elastic traction structure also includes a guide kit that enables the adsorption device to maintain a constant orientation.

[0014] As a further embodiment of the present invention: the guide kit includes a retaining groove disposed on the connecting arm and a follower slidably connected to the adsorption device, the follower being able to slide within the retaining groove, and the follower being connected to the connecting arm by a cylindrical spring.

[0015] As a further embodiment of the present invention: the support assembly includes a first electric telescopic rod fixedly installed on the connecting arm, a vertical guide is connected to the telescopic end of the first electric telescopic rod, a steel connecting rod is slidably installed on the vertical guide, and a first grooved wheel is rotatably installed at the end of the steel connecting rod away from the vertical guide, the first grooved wheel being able to roll in the guide groove;

[0016] The end of the first grooved wheel away from the steel connecting rod is connected to the abutment portion.

[0017] As a further embodiment of the present invention: the guide groove includes two sets of second inclined grooves symmetrically arranged on the side plate, and one end of the two sets of second inclined grooves is connected by a vertical groove;

[0018] The projection of the axis of the second inclined groove along its length direction onto the connecting arm is collinear with the projection of the axis along the length direction of the first inclined groove onto the connecting arm.

[0019] As a further aspect of the present invention, it also includes:

[0020] A quadrilateral structure is provided on the connecting plate, and a second electric telescopic rod is rotatably mounted on the quadrilateral structure. The second electric telescopic rod is rotatably connected to the connecting plate.

[0021] The quadrilateral structure is provided with a linear drive module and a guide shaft, and a sliding sleeve is slidably mounted on the guide shaft.

[0022] The connecting frame is rotatably connected to the linear drive module and the sliding sleeve, and multiple optical modules are installed at equal intervals on the connecting frame.

[0023] As a further embodiment of the present invention: the quadrilateral structure includes a first deflection arm and a second deflection arm that are parallel to and rotatably mounted on the connecting plate. The ends of the first deflection arm and the second deflection arm are connected by a connecting rod. The linear drive module is fixedly connected to the first deflection arm, and the guide shaft is fixedly connected to the second deflection arm.

[0024] The method of using the OLED flexible screen appearance defect visual inspection device as described includes the following steps:

[0025] Step 1: Place the OLED flexible screen to be tested on the two sets of adsorption devices located at the bottom. The adsorption devices fix the OLED flexible screen by generating negative pressure.

[0026] Step 2: The linear drive module moves to drive the optical module to detect one side of the OLED flexible screen.

[0027] Step 3: The support component moves so that the upper adsorption device moves toward the OLED flexible screen and adsorbs the OLED flexible screen. Then the lower adsorption device releases pressure.

[0028] Step four: The supporting components reverse their movement, causing the lower adsorption device to move away from the OLED flexible screen.

[0029] Step 5: Drive the components to move, causing the OLED flexible screen to deflect;

[0030] Step six: The linear drive module reverses its operation to detect the other side of the OLED flexible screen.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] By using the designed drive components, elastic traction structure, and support components, the two sets of adsorption devices can be kept in a staggered state in the initial state. During the inspection, the upper adsorption device will not obstruct the inspection operation, improving the integrity of the inspection. At the same time, the two sets of adsorption devices can alternately adsorb the OLED flexible screen, ensuring the positional stability of the OLED flexible screen throughout the inspection process and improving the inspection accuracy. Meanwhile, the drive components can flip the OLED flexible screen, reducing manual operation and improving production efficiency.

[0033] By using a quadrilateral structure, the optical module is not affected by reflected light when it moves, and it can maintain a constant distance from the OLED flexible screen, thus ensuring the consistency of the detection conditions. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of one embodiment of a visual inspection device for appearance defects in OLED flexible screens.

[0035] Figure 2 This is a schematic diagram of the structure after the outer shell is removed in one embodiment of the visual inspection device for appearance defects of OLED flexible screens.

[0036] Figure 3 This is a schematic diagram of the structure of a visual inspection device for appearance defects of an OLED flexible screen from another angle after the outer shell has been removed, according to one embodiment.

[0037] Figure 4 This is a schematic diagram of the driving component, elastic traction structure, and support component in one embodiment of a visual inspection device for appearance defects of OLED flexible screens.

[0038] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0039] Figure 6 An exploded view of the supporting component structure in one embodiment of a visual inspection device for appearance defects of OLED flexible screens.

[0040] Figure 7 An exploded view of a portion of the elastic traction structure in one embodiment of a visual inspection device for appearance defects in OLED flexible screens.

[0041] Figure 8 This is a schematic diagram of a quadrilateral structure and a connecting frame in one embodiment of a visual inspection device for appearance defects of OLED flexible screens.

[0042] Figure 9 This is a schematic diagram of a quadrilateral structure in one embodiment of a visual inspection device for appearance defects of OLED flexible screens.

[0043] Figure 10 This is a schematic diagram of the structure of a linear drive module, guide shaft, sliding sleeve, and connecting frame in one embodiment of a visual inspection device for appearance defects of OLED flexible screens.

[0044] In the diagram: 1. Outer shell; 2. Connecting plate; 3. Drive device; 4. First gear; 5. Second gear; 6. Connecting arm; 601. First inclined groove; 602. Holding groove; 7. First electric telescopic rod; 8. Vertical guide; 9. Steel connecting rod; 10. First grooved wheel; 1001. Abutment part; 11. Side plate; 1101. Second inclined groove; 1102. Vertical groove; 12. Adsorption device; 13. Second grooved wheel; 1301. Abutment wheel; 14. Follower; 15. Cylindrical spring; 16. Second electric telescopic rod; 17. First deflection arm; 18. Second deflection arm; 19. Connecting rod; 20. Linear drive module; 21. Guide shaft; 22. Sliding sleeve; 23. Connecting frame; 24. Optical module. 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 1-10 In this embodiment of the invention, the OLED flexible screen appearance defect visual inspection device includes: a housing 1, two sets of driving components, an elastic traction structure, and a support component.

[0048] Two sets of driving components are symmetrically arranged, and each end of the driving component is provided with two sets of adsorption devices 12 arranged opposite to each other;

[0049] The drive assembly includes a connecting plate 2 and a connecting arm 6 rotatably mounted on the connecting plate 2. The connecting plate 2 is installed inside the housing 1. A second gear 5 is coaxially fixedly mounted on the rotating shaft of the connecting arm 6. The second gear 5 meshes with a first gear 4 rotatably mounted on the connecting plate 2. The first gear 4 is connected to the output shaft of the drive device 3 fixedly mounted on the connecting plate 2. Specifically, the number of teeth of the first gear 4 is less than the number of teeth of the second gear 5.

[0050] In this embodiment, when the driving device 3 is working, its output shaft can drive the connecting arm 6 connected to it to rotate. In the initial state, one side of the OLED flexible screen is facing upwards, so that one side of the OLED flexible screen can be inspected in this state. After the inspection of this side is completed, the connecting arm 6 can rotate to drive the OLED flexible screen to flip, so that the other side switches to the upward state, so that the other side can be inspected. That is, double-sided inspection of the OLED flexible screen can be realized, improving the comprehensiveness of the inspection. Compared with the traditional method of manually flipping the OLED flexible screen, this device automatically flips the screen after completing the inspection of one side, reducing the amount of manual operation and improving production efficiency.

[0051] Furthermore, by making the number of teeth of the first gear 4 less than the number of teeth of the second gear 5, the load on the drive device 3 when driving the connecting arm 6 to rotate can be effectively reduced, thereby improving the durability of the drive device 3.

[0052] Please see Figure 5 , Figure 7 The elastic traction structure is disposed on the drive assembly and connected to the end of the adsorption device 12. The elastic traction structure can drive the two sets of adsorption devices 12 to move closer to each other.

[0053] The elastic traction structure includes two sets of first inclined grooves 601 symmetrically arranged at one end of the connecting arm 6 and a second grooved wheel 13 rotatably connected to the end of the adsorption device 12. The second grooved wheel 13 can roll in the first inclined groove 601, and an abutting wheel 1301 is provided at the end of the second grooved wheel 13 away from the adsorption device 12. The abutting wheel 1301 is adapted to the abutting part 1001.

[0054] The elastic traction structure also includes a guide kit that enables the adsorption device 12 to maintain a constant orientation.

[0055] Under the pull of the guide assembly, the second grooved wheel 13 maintains its position at the end of the first inclined groove 601. Specifically, the second grooved wheel 13 can be positioned at one end of the first inclined groove 601 near the axis of rotation of the connecting arm 6. The distance between the two symmetrically arranged first inclined grooves 601 gradually decreases along their length toward the axis of rotation of the connecting arm 6. This minimizes the distance between the second grooved wheel 13 and the centerline of the connecting arm 6 along its length when the second grooved wheel 13 is at the end of the first inclined groove 601. This is only the initial position of the lower second grooved wheel 13 and the adsorption device 12. Due to the presence of the support assembly, the abutment wheel 13 on the upper second grooved wheel 13... When 01 is locked, the second set of grooved wheels 13 is positioned at the other end of the corresponding first inclined groove 601, creating a certain gap between the two sets of adsorption devices 12. Furthermore, the two sets are staggered along the length of the connecting arm 6. This ensures that during the inspection process, when the OLED flexible screen is adsorbed and fixed by the lower adsorption device 12, the upper side of the OLED flexible screen is fully exposed. This allows for comprehensive inspection of the upper side of the OLED flexible screen, preventing the obstruction of the clamping and fixing devices from affecting the inspection of the obstructed areas. This improves the comprehensiveness and accuracy of the inspection to a certain extent.

[0056] The guide kit includes a retaining groove 602 disposed on the connecting arm 6 and a follower 14 slidably connected to the adsorption device 12. The follower 14 is slidable within the retaining groove 602 and is connected to the connecting arm 6 by a cylindrical spring 15.

[0057] Since the follower 14 can slide within the holding groove 602 and is slidably connected to the adsorption device 12, under the guidance of the follower 14, when the adsorption device 12 is activated, it can always maintain the orientation relative to the connecting arm 6, so as to improve the orientation stability when the adsorption device 12 adsorbs the OLED flexible screen, improve the stability of the OLED flexible screen during detection, and prevent inaccurate detection results caused by the shaking of the OLED flexible screen.

[0058] By setting the columnar spring 15, it is in a stretched state in the initial state, so that the columnar spring 15 has the tendency to pull the follower 14 toward the rotating shaft of the connecting arm 6. Then, the second grooved wheel 13 on the lower adsorption device 12 can abut against the end of the first inclined groove 601 toward the rotating shaft of the connecting arm 6, so that the adsorption device 12 can have higher stability in this state, preventing the position of the adsorption device 12 from changing during the detection process, causing a small amount of sliding friction between it and the OLED flexible screen, and causing the OLED flexible screen to be in a non-tensioned state after the adsorption device 12 stops.

[0059] Please see Figure 4 , Figure 6 The support component is disposed on the drive component. The support component includes a push structure and a side plate 11. A guide groove is formed on the side plate 11. The push structure can move within the guide groove. The push structure is provided with an abutment part 1001. The abutment part 1001 cooperates with the elastic traction structure to make the two sets of adsorption devices 12 misaligned.

[0060] The support assembly includes a first electric telescopic rod 7 fixedly installed on the connecting arm 6. A vertical guide 8 is connected to the telescopic end of the first electric telescopic rod 7. A steel connecting rod 9 is slidably installed on the vertical guide 8. A first grooved wheel 10 is rotatably installed at the end of the steel connecting rod 9 away from the vertical guide 8. The first grooved wheel 10 can roll in the guide groove.

[0061] The end of the first grooved wheel 10 away from the steel connecting rod 9 is connected to the abutment portion 1001;

[0062] The guide groove includes two sets of second inclined grooves 1101 symmetrically arranged on the side plate 11, and one end of the two sets of second inclined grooves 1101 is connected by a vertical groove 1102.

[0063] The projection of the axis of the second inclined groove 1101 along its length direction onto the connecting arm 6 is collinear with the projection of the axis along the length direction of the first inclined groove 601 onto the connecting arm 6.

[0064] Specifically, the application includes four sets of adsorption devices 12. Two sets of adsorption devices 12 are located at the bottom with their adsorption parts facing upwards, while the other two sets are located at the top with their adsorption parts facing downwards. In the initial state, because the abutting part 1001 acts on the abutting wheel 1301 connected to the upper adsorption device 12, the second grooved wheel 13 connected to the upper adsorption device 12 is positioned away from the first inclined groove 601 and the rotating shaft of the connecting arm 6. Meanwhile, the second grooved wheels 13 on the two lower sets of adsorption devices 12 are pulled by the cylindrical spring 15 and positioned away from the first inclined groove 601 and the rotating shaft of the connecting arm 6. The inclined groove 601 abuts against one end of the connecting arm 6's rotating shaft, meaning the distance between the two sets of adsorption devices 12 at the top is greater than the distance between the two sets of adsorption devices 12 at the bottom, and the two sets of adsorption devices 12 at one end of the connecting arm 6 are in a misaligned state. In this state, the OLED flexible screen to be tested is placed on the lower adsorption device 12, and the OLED flexible screen is kept flat. Then, the two sets of adsorption devices 12 at the bottom are controlled to move, so as to use the negative pressure generated by them to fix the OLED flexible screen and ensure the stability of the OLED flexible screen during the testing process.

[0065] After the inspection of one side of the OLED flexible screen is completed, the actuating end of the first electric telescopic rod 7 is retracted. At this time, the vertical guide 8 connected to it will move synchronously and cause the abutment part 1001 to move. At this time, the abutment wheel 1301 loses the support of the abutment part 1001 and can move along the length direction of the first inclined groove 601 under the pull of the column spring 15. During this process, the upper adsorption device 12 will move toward the lower adsorption device 12 until the second groove wheel 13 on the upper adsorption device 12 moves to the end of the first inclined groove 601. At this time, the upper adsorption device 12 and the lower adsorption device 12 are in the projection overlap state on the OLED flexible screen. At this time, the lower adsorption device 12 is depressurized, while the upper adsorption device 12 generates negative pressure, thereby switching the OLED flexible screen from being adsorbed by the lower adsorption device 12 to being adsorbed by the upper adsorption device 12.

[0066] When the two sets of adsorption devices 12 overlap, the first grooved wheel 10 moves to the end of the upper second inclined groove 1101. At this time, under the action of gravity, the steel connecting rod 9 can drive the first grooved wheel 10 to move downward along the length direction of the vertical guide member 8. During this process, the first grooved wheel 10 can move within the vertical groove 1102. When the first grooved wheel 10 moves to the end of the vertical groove 1102, the first electric telescopic rod 7 will drive the steel connecting rod 9 away from the pivot of the connecting arm 6, so that the first grooved wheel 10 can move along the lower second inclined groove 1101. The device moves 101 and, after contacting the abutting wheel 1301 of the lower adsorption device 12, drives the abutting wheel 1301 to move along the corresponding first inclined groove 601. This allows the lower adsorption device 12 to move away from the OLED flexible screen and be misaligned with the upper adsorption device 12, thereby realizing the alternating adsorption of the OLED flexible screen by the upper and lower adsorption devices 12. Subsequently, the drive component drives the connecting arm 6 to rotate so that the lower side of the OLED flexible screen switches to the upper side, thereby enabling double-sided detection.

[0067] Based on the above settings, firstly, the two sets of adsorption devices 12, one above the other, can maintain a staggered position in the initial state, so that the upper adsorption device 12 will not obstruct the detection operation during the detection process, thus improving the integrity of the detection. Secondly, the two sets of adsorption devices 12 can alternately adsorb the OLED flexible screen, ensuring the positional stability of the OLED flexible screen throughout the detection process and improving the detection accuracy. At the same time, during the first electric telescopic rod 7's extension and retraction action, the two sets of adsorption devices 12 automatically complete the alternating adsorption process, improving the automation level of the device.

[0068] It should be noted that the adsorption position of the adsorption device 12 is provided with a suction cup that is connected to its interior. When the lower adsorption device 12 uses the suction cup to adsorb and fix the OLED flexible screen, the suction cup is in a compressed and deformed state. This means that when the upper adsorption device 12 overlaps with the lower adsorption device 12, the suction cup on the upper adsorption device 12 will not contact the OLED flexible screen, and there is a gap between the two. This avoids the OLED flexible screen from changing position due to friction between the suction cup and the OLED flexible screen when the adsorption device 12 is in operation. When the upper and lower adsorption devices 12 overlap, the lower adsorption device 12 is depressurized. At this time, the suction cup connected to it resets and can lift the OLED flexible screen upward by a certain displacement, so that the OLED flexible screen can fit with the suction cup on the upper adsorption device 12. When the upper adsorption device 12 generates negative pressure, the corresponding suction cup can also be squeezed and deformed, so that the OLED flexible screen can separate from the suction cup on the lower adsorption device 12, so as to better perform the alternating adsorption and fixing operation.

[0069] Please see Figure 2 , Figure 3 , Figures 8-10 The aforementioned OLED flexible screen appearance defect visual inspection device further includes: a quadrilateral structure and a connecting frame 23.

[0070] A quadrilateral structure is provided on the connecting plate 2, and a second electric telescopic rod 16 is rotatably mounted on the quadrilateral structure. The second electric telescopic rod 16 is rotatably connected to the connecting plate 2.

[0071] The quadrilateral structure is provided with a linear drive module 20 and a guide shaft 21, and a sliding sleeve 22 is slidably mounted on the guide shaft 21.

[0072] The quadrilateral structure includes a first deflection arm 17 and a second deflection arm 18 that are parallel to and rotatably mounted on the connecting plate 2. The ends of the first deflection arm 17 and the second deflection arm 18 are connected by a connecting rod 19. The linear drive module 20 is fixedly connected to the first deflection arm 17, and the guide shaft 21 is fixedly connected to the second deflection arm 18.

[0073] The connecting frame 23 is rotatably connected to the linear drive module 20 and the sliding sleeve 22, and multiple optical modules 24 are equidistantly mounted on the connecting frame 23.

[0074] In the initial state, the connecting arm 6 is slightly tilted, and the optical module 24 is vertically oriented. When the illumination light emitted by the optical module 24 acts on the OLED flexible screen, it will not be reflected back vertically, which will not affect the detection of the optical module 24 and improve the detection accuracy.

[0075] Furthermore, in this embodiment, the first deflection arm 17, the second deflection arm 18, and the two sets of connecting rods 19 form a parallelogram structure, ensuring that the two sets of connecting rods 19 remain vertical. The connecting frame 23 is rotatably connected to the sliding sleeve 22 and the linear drive module 20, ensuring that the optical module 24 on the connecting frame 23 remains vertical when it moves. The first deflection arm 17 and the second deflection arm 18 remain parallel to the connecting arm 6, ensuring that the optical module 24 is not affected by reflected light when it moves, and that it maintains a constant distance from the OLED flexible screen, thereby ensuring the consistency of detection conditions and improving the detection structure.

[0076] It is worth noting that the tilt angle of the connecting arm 6 needs to be determined according to the OLED flexible screen in order to minimize the impact of reflected light on the detection structure. That is, the tilt angle of the connecting arm 6 is not consistent for different types of OLED flexible screens. At this time, the second electric telescopic rod 16 can adjust the tilt angle of the first deflection arm 17 and the second deflection arm 18 to ensure that the distance between the optical module 24 and the OLED flexible screen remains constant when the optical module 24 is in motion, and at the same time ensure the vertical state of the optical module 24.

[0077] It should also be noted that in the initial state, the optical module 24 is at the end of its stroke. In this state, the connecting frame 23 and the optical module 24 will not interfere with the rotation of the connecting arm 6. That is, in the initial state, the connecting frame 23 and the optical module 24 are outside the rotation radius of the connecting arm 6.

[0078] As an embodiment of the present invention, a method for using the visual inspection device for appearance defects of OLED flexible screens as described above is also proposed, comprising the following steps:

[0079] Step 1: Place the OLED flexible screen to be tested on the two sets of adsorption devices 12 located at the bottom. The adsorption devices 12 fix the OLED flexible screen by generating negative pressure.

[0080] Step 2: The linear drive module 20 moves, driving the optical module 24 to detect one side of the OLED flexible screen.

[0081] Step 3: The support component moves so that the upper adsorption device 12 moves toward the OLED flexible screen and uses the upper adsorption device 12 to adsorb the OLED flexible screen. Then the lower adsorption device 12 is depressurized.

[0082] Step four: The supporting components reverse their movement, causing the lower adsorption device 12 to move away from the OLED flexible screen.

[0083] Step 5: Drive the components to move, causing the OLED flexible screen to deflect;

[0084] Step six: The linear drive module 20 reverses its movement to detect the other side of the OLED flexible screen.

[0085] 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.

[0086] 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 appearance defects of OLED flexible screens, characterized in that, include: Two sets of driving components are symmetrically arranged, and each end of the driving component is provided with two sets of adsorption devices arranged opposite to each other. An elastic traction structure is disposed on the drive assembly and connected to the end of the adsorption device, the elastic traction structure being able to drive the two sets of the adsorption devices to move closer to each other. A support component is disposed on the drive component. The support component includes a push structure and a side plate. A guide groove is formed on the side plate. The push structure can move within the guide groove. An abutment part is provided on the push structure. The abutment part cooperates with the elastic traction structure to make the two sets of adsorption devices misaligned. The drive assembly includes a connecting plate and a connecting arm rotatably mounted on the connecting plate. A second gear is coaxially fixedly mounted on the rotating shaft of the connecting arm. The second gear meshes with a first gear rotatably mounted on the connecting plate. The first gear is connected to the output shaft of the drive device fixedly mounted on the connecting plate. The elastic traction structure includes two sets of first inclined grooves symmetrically arranged at one end of the connecting arm and a second groove wheel rotatably connected to the end of the adsorption device. The second groove wheel can roll in the first inclined groove, and an abutting wheel is provided at the end of the second groove wheel away from the adsorption device. The abutting wheel is adapted to the abutting part. The elastic traction structure also includes a guide kit that enables the adsorption device to maintain a constant orientation. The support assembly includes a first electric telescopic rod fixedly mounted on the connecting arm. A vertical guide is connected to the telescopic end of the first electric telescopic rod. A steel connecting rod is slidably mounted on the vertical guide. A first grooved wheel is rotatably mounted on the end of the steel connecting rod away from the vertical guide. The first grooved wheel can roll in the guide groove. The end of the first grooved wheel away from the steel connecting rod is connected to the abutment portion.

2. The OLED flexible screen appearance defect visual inspection device according to claim 1, characterized in that, The number of teeth on the first gear is less than the number of teeth on the second gear.

3. The OLED flexible screen appearance defect visual inspection device according to claim 2, characterized in that, The guide kit includes a retaining groove disposed on the connecting arm and a follower slidably connected to the adsorption device. The follower is slidable within the retaining groove and is connected to the connecting arm by a cylindrical spring.

4. The OLED flexible screen appearance defect visual inspection device according to claim 3, characterized in that, The guide groove includes two sets of second inclined grooves symmetrically arranged on the side plate, and one end of the two sets of second inclined grooves is connected by a vertical groove. The projection of the axis of the second inclined groove along its length direction onto the connecting arm is collinear with the projection of the axis along the length direction of the first inclined groove onto the connecting arm.

5. The OLED flexible screen appearance defect visual inspection device according to claim 1, characterized in that, Also includes: A quadrilateral structure is provided on the connecting plate, and a second electric telescopic rod is rotatably mounted on the quadrilateral structure. The second electric telescopic rod is rotatably connected to the connecting plate. The quadrilateral structure is provided with a linear drive module and a guide shaft, and a sliding sleeve is slidably mounted on the guide shaft. The connecting frame is rotatably connected to the linear drive module and the sliding sleeve, and multiple optical modules are installed at equal intervals on the connecting frame.

6. The OLED flexible screen appearance defect visual inspection device according to claim 5, characterized in that, The quadrilateral structure includes a first deflection arm and a second deflection arm that are parallel to and rotatably mounted on the connecting plate. The ends of the first deflection arm and the second deflection arm are connected by a connecting rod. The linear drive module is fixedly connected to the first deflection arm, and the guide shaft is fixedly connected to the second deflection arm.

7. The method of using the OLED flexible screen appearance defect visual inspection device as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Place the OLED flexible screen to be tested on the two sets of adsorption devices located at the bottom. The adsorption devices fix the OLED flexible screen by generating negative pressure. Step 2: The linear drive module moves to drive the optical module to detect one side of the OLED flexible screen. Step 3: The support component moves so that the upper adsorption device moves toward the OLED flexible screen and adsorbs the OLED flexible screen. Then the lower adsorption device releases pressure. Step four: The supporting components reverse their movement, causing the lower adsorption device to move away from the OLED flexible screen. Step 5: Drive the components to move, causing the OLED flexible screen to deflect; Step six: The linear drive module reverses its operation to detect the other side of the OLED flexible screen.

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