Mobile phone screen defect detection device and detection method

Abstract

The invention relates to a mobile phone screen defect detection device and a detection method, the mobile phone screen defect detection device is used for detecting defects of a mobile phone screen, the mobile phone screen defect detection device comprises: a rotating dust removal assembly, the rotating dust removal assembly comprises a rotating piece and a plurality of groups of rotating clamping pieces arranged on one side surface of the rotating piece in a protruding manner, and the groups of rotating clamping pieces are arranged at intervals along the vertical direction; the at least two groups of rotary clamping pieces are used for clamping a mobile phone screen; the flaw detection assembly comprises a camera and a light source, the light source can move to the lower side of the mobile phone screen, and the camera is located on one side of the mobile phone screen in the horizontal direction; therefore, the problem of screen edge detection blind areas can be solved through the rotary dust removal assembly and the defect detection assembly, and the yield of mobile phone screens is effectively guaranteed.

Description

Technical Field

[0001] This invention patent relates to the field of electronic component testing, and in particular to a device and method for detecting defects in mobile phone screens. Background Technology

[0002] With the widespread use of smartphones, the phone screen, as the core interface for human-computer interaction, faces increasingly stringent quality requirements. After cleaning and drying, phone screens undergo inspection. Current inspection equipment typically involves placing the cleaned and dried screen on a conveyor belt to the inspection station, where it is then gripped and inspected by robotic arms or similar devices. However, the gripping of the screen by these robotic arms can easily result in indentations, dust, and other defects along the edges. Furthermore, existing inspection devices primarily inspect the two larger sides of the screen, offering limited effectiveness in inspecting the edges.

[0003] Invention Patent Content

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing mainstream mobile phone screen inspection technology, such as the single viewing angle and the failure to detect curved surface defects, so as to provide a mobile phone screen defect detection device and detection method.

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

[0006] A mobile phone screen defect detection device, comprising:

[0007] A rotating dust removal assembly includes a rotating component and multiple sets of rotating clamping components protruding from one side of the rotating component. Each set of rotating clamping components is spaced apart in the vertical direction, and at least two sets of rotating clamping components clamp the mobile phone screen.

[0008] The defect detection component includes a camera and a light source, wherein the light source is movable to the lower side of the mobile phone screen and the camera is located on one side of the mobile phone screen in the horizontal direction.

[0009] Preferably, the defect detection component further includes a semi-transparent mirror located between the light source and the mobile phone screen. The semi-transparent mirror is set at an angle to the horizontal direction. Part of the light from the light source passes through the semi-transparent mirror and enters the lower side of the mobile phone screen in a vertical direction, while another part of the light from the light source is refracted by the semi-transparent mirror to the camera.

[0010] Preferably, the light source includes a main body, a light-emitting element, and a diffuser. The main body includes a light-emitting surface. The light-emitting element is fixedly disposed within the main body and corresponds to the light-emitting surface. The diffuser is disposed on the light-emitting surface. The thickness of the light-emitting surface is greater than the thickness of the mobile phone screen.

[0011] Preferably, the rotating dust removal assembly further includes a flipping component, which is fixedly disposed with the rotating component, and the rotating clamping component is fixed to the output end of the flipping component. The flipping component can drive the rotating component and the mobile phone screen to flip.

[0012] Preferably, the mobile phone screen defect detection device further includes a horizontal conveying component, which includes a horizontal moving part and a horizontal clamping part disposed on the horizontal moving part; along the horizontal direction, the projection of the horizontal clamping part is located between the projections of the two sets of rotating clamping parts.

[0013] Preferably, the mobile phone screen rotation detection device further includes a vertical conveying component, which is located between the horizontal conveying component and the rotation component; the vertical conveying component includes a vertical moving member and a vertical clamping member disposed on the vertical moving member, the vertical clamping member clamping multiple mobile phone screens; along the horizontal direction, the projection of the horizontal clamping member and the projection of the vertical clamping member located at the highest position are spaced apart.

[0014] Preferably, the mobile phone screen defect detection device further includes a recycling component, which includes a recycling robot, a laminating machine, and a recycling bin. The recycling robot can move the mobile phone screen to the laminating machine or the recycling bin.

[0015] A method for detecting defects in a mobile phone screen includes the following steps: S1, a rotating component drives a rotating clamping component and the mobile phone screen to rotate along a first direction and a first preset angle to a detection station; S2, a light source moves to the underside of the mobile phone screen, and the light from the light source shines vertically into the underside of the mobile phone screen; S3, the first set of rotating clamping components is released, the second set of rotating clamping components is clamped, and the camera takes a first picture; the second set of rotating clamping components is released, the first set of rotating clamping components is clamped, and the camera takes a second picture; S4, a flipping component drives the mobile phone screen to flip along a second direction and a second preset angle, and the camera takes a third picture; the flipping component drives the mobile phone screen to flip along the second direction and a third preset angle, and the camera takes a fourth picture.

[0016] Preferably, before step S1, the vertical conveying component is at its highest position, the vertical clamping member clamps multiple cleaned and dried mobile phone screens, the horizontal clamping member clamps one mobile phone screen, the vertical moving member drives the vertical clamping member and the remaining mobile phone screens to move downwards to the lowest position, the horizontal moving member drives the horizontal clamping member and the mobile phone screens to move horizontally to the rotating component, the rotating clamping member clamps the mobile phone screen, the horizontal clamping member releases the mobile phone screen, and the horizontal moving member drives the horizontal clamping member back to its original position.

[0017] Preferably, the method further includes step S5, which determines whether the mobile phone screen has defects based on the results of four shootings. If there are defects, the recycling robot transports the mobile phone screen to the recycling bin. If there are no defects, the recycling robot transports the mobile phone screen to the laminating machine for lamination.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The rotating dust removal assembly provided in the above technical solution drives the rotating clamping component and the mobile phone screen to rotate, thereby removing at least part of the dust from the mobile phone screen and ensuring the yield rate of the mobile phone screen. The light source illuminates the mobile phone screen by transmitting light vertically upward from the bottom of the screen, and through the clamping of two sets of rotating clamping components, the camera can completely capture the edge of the mobile phone screen, thus achieving a better inspection effect. Attached Figure Description

[0020] To more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific implementation methods or the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a main view of a mobile phone screen production line provided in the first embodiment of the present invention;

[0022] Figure 2 This is a top view of a mobile phone screen production line provided in the first embodiment of the present invention;

[0023] Figure 3 This is an assembly diagram of the defect detection component, horizontal conveying component, and rotating dust removal component shown in this invention.

[0024] Figure 4 This is an enlarged assembly diagram of the vertical conveying assembly and the horizontal conveying assembly shown in this invention;

[0025] Figure 5 For the present invention Figure 1 An enlarged schematic diagram of the defect detection component shown;

[0026] Figure 6 For the present invention Figure 1 An enlarged schematic diagram of the rotating dust removal assembly shown;

[0027] Figure 7 For the present invention Figure 1 A magnified schematic diagram of the light source of the defect detection component shown;

[0028] Figure 8 For the present invention Figure 1 An enlarged schematic diagram of the mobile phone screen container of the transport component shown.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Rotary dust removal assembly; 11. Rotating component; 111. Rotating clamping component; 12. Flipping component; 2. Defect detection assembly; 21. Camera; 22. Light source; 221. Main body; 2211. Light-emitting surface; 222. Light-emitting component; 223. Diffuser; 23. Semi-transparent and semi-reflective mirror; 3. Horizontal conveying assembly; 31. Horizontal moving component; 311. Horizontal clamping component; 4. Vertical conveying assembly; 41. Vertical moving component; 5. Recycling assembly; 6. Transportation assembly; 61. Mobile phone screen material box. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0032] Please see Figures 1 to 6 The mobile phone screen defect detection device provided in this embodiment includes a rotating dust removal component 1, a defect detection component 2, a horizontal conveying component 3, a vertical conveying component 4, and a recycling component 5.

[0033] The rotating dust removal assembly 1 includes a rotating component 11 and multiple sets of rotating clamping components 111 protruding from one side of the rotating component 11. Each set of rotating clamping components 111 is spaced apart horizontally along the rotating component 11, clamping the upper and lower edges of the short side of the mobile phone screen. The projection of the clamping component of the horizontal conveying assembly 3 is located between the projections of the two sets of rotating clamping components 111, preventing collision between the horizontal clamping component 311 and the rotating clamping component 111. Two sets of rotating clamping components 111 clamp one mobile phone screen. Each set of flipping components 12 includes two symmetrically arranged motors and two symmetrically arranged cover plates. The cover plates are fixedly connected to the output shafts of the motors. The motors can drive the cover plates and the two rotating clamping components to rotate. The cover plates are driven by the motors to move along the length of the rotating component 11. A 1.2mm thick flexible silicone pad is attached to the inner side of the rotating clamping component 111 to prevent damage to the screen. The rotating clamping components 111 achieve synchronous movement through their internal connecting rods, ensuring uniform distribution of clamping force. Each set of rotating clamping parts 111 is respectively set on both sides of the inner side of the cover plate. When clamping the mobile phone screen, the connecting rod driven by the two cylinders moves inward synchronously to close the rotating clamping parts 111 and clamp the screen, or moves outward synchronously to open the rotating clamping parts 111 and release the mobile phone screen, ensuring that the mobile phone screen is accurately positioned without deviation.

[0034] The defect detection component 2 includes a camera 21 and a light source 22. The light source 22 can be moved to the lower side of the mobile phone screen. The camera 21 is located on one side of the mobile phone screen in the horizontal direction and is parallel to the mobile phone screen. The defect detection component 2 also includes a semi-transparent mirror 23 located between the light source 22 and the mobile phone screen. The semi-transparent mirror 23 is set at a 45° angle to the horizontal direction. Part of the light from the light source 22 passes through the semi-transparent mirror 23 and enters the lower side of the mobile phone screen in the vertical direction, while the other part of the light is refracted by the semi-transparent mirror 23 into the camera 21. The light is directly refracted to the camera 21 through the semi-transparent mirror 23, shortening the optical path distance, avoiding ambient light interference, and improving image clarity and signal-to-noise ratio. The light is perpendicularly transmitted into the inside of the mobile phone screen, making scratches, cracks, and other defects at the edge of the mobile phone screen significantly prominent in the image of the camera 21 due to the difference in refraction, greatly improving the detection rate of edge defects. The diffuser 223 design, which works in conjunction with the light source 22, reduces reflective interference and particularly improves the detection adaptability of curved mobile phone screens.

[0035] The light source 22 includes a main body 221, a light-emitting element 222, and a diffuser 223. The main body 221 includes a light-emitting surface 2211. The light-emitting element 222 is fixedly disposed within the main body 221 and corresponds to the light-emitting surface 2211. The diffuser 223 is attached to the light-emitting surface 2211. Considering the convenience and reliability of attachment, the diffuser 223 is a diffuse film, and its size is consistent with that of the light-emitting surface 2211. Since the diffuser film can precisely control the light distribution and physically disrupt the specular reflection path of the curved mobile phone screen, the addition of the diffuser film ensures that the light intensity of the light source 22 illuminating the mobile phone screen reaches the applicable range for defect detection. At the same time, it significantly improves the camera 21's ability to resist glare interference when inspecting curved mobile phone screens. Furthermore, the width of the light-emitting surface 2211 is greater than the thickness of the mobile phone screen. This design not only adapts to mobile phone screens of all thicknesses / curvatures but also solves the industry technical problems of "insufficient edge illumination" and "curvature artifact interference."

[0036] The rotating dust removal assembly 1 also includes a flipping component 12, which includes a motor and a cover plate. The motor drives the transmission shaft to rotate, and the cover plate is fixed to the output shaft as a whole, causing the rotating cover plate to rotate. The rotating clamping component 111 is connected to the cover plate by threads, allowing the rotating clamping component 111 to clamp the mobile phone screen and achieve a 360° counterclockwise rotation. The flipping component 12 can drive the rotating clamping component 111 and the mobile phone screen to flip, so that the edge of the mobile phone screen faces the camera 21, thereby achieving the effect of detecting the edge of the mobile phone screen. The rotating component 11 is a vertically mounted turntable, driven by a motor to rotate around its own central axis, which can drive the rotating component 11 to rotate 360° counterclockwise.

[0037] The horizontal conveying assembly 3 includes a horizontal moving member 31 and a horizontal clamping member 311 disposed on the horizontal moving member 31. The horizontal moving member 31 drives the horizontal clamping member 311 to move the mobile phone screen in the horizontal direction. Its projection is strictly centered in the projection gap of the rotating clamping member 111 to ensure zero collision during transfer. The mobile phone screen rotation detection device also includes a vertical conveying assembly 4, which is located between the horizontal conveying assembly 3 and the rotating dust removal assembly 1. The vertical conveying assembly 4 includes a vertical moving member 41 and a vertical clamping member disposed on the vertical moving member 41. The vertical clamping member clamps multiple mobile phone screens. In the horizontal direction, the projection of the horizontal clamping member 311 is set at an interval of ≥15mm from the projection of the vertical clamping member located at the highest position to achieve three-dimensional avoidance.

[0038] The mobile phone screen defect detection device also includes a recycling component 5, which comprises a recycling robot, a laminating machine, and a recycling bin. The recycling robot is a multi-joint servo robotic arm with an integrated adaptive pneumatic gripper at its end, capable of moving the mobile phone screen to the laminating machine or the recycling bin. The laminating machine has a laminating unit integrated into the side of the recycling path. The recycling bin has a sorting compartment, which is the portion of the recycling bin that vertically stores the mobile phone screens.

[0039] The mobile phone screen defect detection device also includes a transport component 6, which includes a mobile phone screen material box 61 and a conveyor belt. The mobile phone screen material box 61 includes a main body, a support member, and a clamping member. Both ends of the support member are connected to the main body. The clamping members are spaced apart on the main body, and the clamping members 3 are located on the upper side of the support member.

[0040] The specific implementation steps are as follows:

[0041] S1, the rotating component 11 drives the rotating clamping component 111 and the mobile phone screen to rotate 360° vertically along the central axis of the rotating dust removal component 1 to the inspection station, using centrifugal force to remove residual dust, while exposing the screen edge completely to prepare for inspection;

[0042] S2, the light source 22 moves to the bottom of the phone screen, and the light from the light source 22 shines into the bottom of the phone screen in a vertically upward direction, so that all areas of the phone screen are illuminated. The light penetrates the edge area and enhances the contrast of the defects through the difference in refraction.

[0043] S3, release the first set of rotating clamps 111, clamp the second set of rotating clamps 111, exposing the top edge of the phone screen. Camera 21 captures the top imperfection and takes the first picture. Release the second set of rotating clamps 111, clamp the first set of rotating clamps 111, exposing the bottom edge of the phone screen. Camera 21 captures the bottom imperfection and takes the second picture. By taking pictures in two alternating clamping positions, the technical problem of blind spots in camera 21 shooting during clamping is solved, achieving 100% edge coverage detection.

[0044] S4, the flipping component 12 rotates the phone screen 90° counterclockwise along the width of the rotating dust removal component 1, so that the side edge of the phone screen faces the camera 21 to detect side defects. The camera 21 then takes a third picture. Next, the flipping component 12 rotates the phone screen 180° counterclockwise along the width of the rotating dust removal component 1, so that the back edge of the phone screen faces the camera 21 to detect back edge defects. The camera 21 then takes a fourth picture. Through multi-angle flipping detection, blind spots in the viewing angle of the curved phone screen are eliminated, ensuring no defects are missed.

[0045] Before step S1, the vertical conveyor assembly 4 is at its highest position, with the vertical clamp holding multiple cleaned and dried mobile phone screens, and the horizontal clamp 311 holding one mobile phone screen. The vertical moving component 41 moves the vertical clamp and the remaining mobile phone screens downwards to the lowest position, achieving precise feeding. The horizontal moving component 31 moves the horizontal clamp 311 and the mobile phone screens horizontally to the rotating component, where the rotating clamp 111 holds the mobile phone screen. The horizontal clamp 311 releases the mobile phone screen, and the horizontal moving component 31 moves the horizontal clamp 311 back to its original position. The centered projection design of the horizontal clamp 311 during transport avoids potential collisions. Through the coordinated processing of the vertical conveyor assembly 4 and the horizontal conveyor assembly 3, the mobile phone screen conveying process is seamlessly connected to the inspection process, effectively improving the production capacity of the mobile phone screen production line.

[0046] The process also includes step S5, which determines whether the phone screen has defects based on the results of four shots. If defects are found, the recycling robot transports the phone screen to a recycling bin to isolate the defective product; if no defects are found, the recycling robot transports the phone screen to a laminating machine for lamination, completing immediate lamination to prevent damage. Step S5 completes the closed-loop product processing, effectively improving the yield rate.

[0047] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A mobile phone screen defect detection device, used to detect defects on a mobile phone screen, characterized in that, include: The rotating dust removal assembly (1) includes a rotating component (11) and multiple sets of rotating clamping components (111) protruding from one side of the rotating component (11). Each set of rotating clamping components (111) is spaced apart in the vertical direction, and at least two sets of rotating clamping components (111) clamp the mobile phone screen. The defect detection component (2) includes a camera (21) and a light source (22), wherein the light source (22) is movable to the lower side of the mobile phone screen and the camera (21) is located on one side of the mobile phone screen in the horizontal direction.

2. The mobile phone screen defect detection device according to claim 1, characterized in that, The defect detection component (2) also includes a semi-transparent mirror (23) located between the light source (22) and the mobile phone screen. The semi-transparent mirror (23) is set at an angle to the horizontal direction. Part of the light from the light source (22) passes through the semi-transparent mirror (23) and enters the lower side of the mobile phone screen in a vertical direction. Another part of the light from the light source (22) is refracted by the semi-transparent mirror (23) to the camera (21).

3. The mobile phone screen defect detection device according to claim 1, characterized in that, The light source (22) includes a main body (221), a light-emitting element (222), and a diffuser (223). The main body (221) includes a light-emitting surface (2211). The light-emitting element (222) is fixedly disposed in the main body (221) and corresponds to the light-emitting surface (2211). The diffuser (223) is disposed on the light-emitting surface (2211). The width of the light-emitting surface (2211) is greater than the thickness of the mobile phone screen.

4. The mobile phone screen defect detection device according to claim 1, characterized in that, The rotating dust removal assembly (1) also includes a flipping component (12), which is fixedly disposed with the rotating component (11). The rotating clamping component (111) is fixed to the output end of the flipping component (12). The flipping component (12) can drive the rotating component (11) and the mobile phone screen to flip.

5. The mobile phone screen defect detection device according to claim 1, characterized in that, The mobile phone screen defect detection device further includes a horizontal conveying component (3), which includes a horizontal moving part (31) and a horizontal clamping part (311) disposed on the horizontal moving part (31). Along the horizontal direction, the projection of the horizontal clamp (311) lies between the projections of the two sets of rotating clamps (111).

6. The mobile phone screen defect detection device according to claim 1, characterized in that, The mobile phone screen rotation detection device further includes a vertical conveying component, which is located between the horizontal conveying component (3) and the rotating dust removal component (1); the vertical conveying component includes a vertical moving part and a vertical clamping part disposed on the vertical moving part, the vertical clamping part clamping multiple mobile phone screens; Along the horizontal direction, the projection of the horizontal clamp (311) is spaced apart from the projection of the vertical clamp located at the highest position.

7. The mobile phone screen defect detection device according to claim 1, characterized in that, The mobile phone screen defect detection device also includes a recycling component, which includes a recycling robot, a laminating machine, and a recycling bin. The recycling robot can move the mobile phone screen to the laminating machine or the recycling bin.

8. A method for detecting defects in mobile phone screens, characterized in that, The mobile phone screen defect detection device according to any one of claims 1-7 includes the following steps: S1, the rotating component (1) drives the rotating clamping component (111) and the mobile phone screen to rotate along the first direction to the detection station by a first preset angle; S2, the light source (22) moves to the bottom side of the mobile phone screen, and the light from the light source (22) shines vertically into the bottom side of the mobile phone screen; S3, release the first set of rotating clamps (111), clamp the second set of rotating clamps (111), and the camera (21) takes the first picture; release the second set of rotating clamps (111), clamp the first set of rotating clamps (111), and the camera (21) takes the second picture. S4, the flipping component (12) drives the mobile phone screen to flip along the second direction to a second preset angle, and the camera (21) takes a third shot. The flipping component (12) drives the mobile phone screen to flip along the second direction to a third preset angle, and the camera (21) takes a fourth shot.

9. The method for detecting defects in a mobile phone screen according to claim 8, characterized in that, Before step S1, the vertical conveying component (4) is in the highest position, the vertical clamping member (41) clamps multiple cleaned and dried mobile phone screens, the horizontal clamping member (311) clamps one mobile phone screen, the vertical moving member (41) drives the vertical clamping member (41) and the remaining mobile phone screens to move downward to the lowest position, the horizontal moving member (31) drives the horizontal clamping member (311) and the mobile phone screen to move horizontally to the rotating dust removal component (1), the rotating clamping member (111) clamps the mobile phone screen, the horizontal clamping member (311) releases the mobile phone screen, and the horizontal moving member (31) drives the horizontal clamping member (311) back to the original position.

10. The method for detecting defects in a mobile phone screen according to claim 8, characterized in that, The method also includes step S5, which determines whether the mobile phone screen has defects based on the results of the four shots. If there are defects, the recycling robot will transport the mobile phone screen to the recycling bin. If there are no defects, the recycling robot will transport the mobile phone screen to the laminating machine for lamination.

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