Excess Adhesive Detection Device and Detection Method

Abstract

This application provides an adhesive overflow detection device and method for detecting adhesive overflow. The detection device includes a support mechanism, a laser detection mechanism, a moving mechanism, and a control device. The laser detection mechanism includes a laser emitter and a laser detector. The laser emitter emits laser light to multiple detection points within the inspection area of ​​the workpiece. The laser detector detects the laser light reflected back from the multiple detection points on the workpiece. The control device controls the moving mechanism to drive the laser detection mechanism and the support mechanism to move relative to each other, so that the laser emitter marks multiple detection points within the inspection area of ​​the workpiece with laser light for adhesive overflow detection. The laser detection mechanism generates detection phase shift information and, based on this information, determines whether the detection phase shift information and reference phase shift information meet the adhesive overflow range, thereby determining whether adhesive overflow has occurred. Therefore, this application does not require destructive testing to inspect the adhesive overflow of the display screen.

Description

Technical Field

[0001] This application relates to the field of adhesive overflow detection technology, specifically to adhesive overflow detection devices and detection methods. Background Technology

[0002] In the manufacturing process of electronic devices, the functionality of the display screen is often verified. In some cases, the display screen may malfunction during the testing phase. For example, vertical lines may appear on the screen. This could be because the glue inside the display screen has overflowed into the touch circuitry, causing the touch function to fail.

[0003] However, this glue overflow phenomenon usually exists inside the display screen, making it difficult to detect with traditional visual inspection. Therefore, inspection often requires disassembling the display screen, which is a destructive test. Summary of the Invention

[0004] To address the shortcomings of existing technologies, it is necessary to provide an adhesive overflow detection device.

[0005] In addition, this application also provides a method for detecting adhesive overflow.

[0006] This application provides an adhesive overflow detection device for detecting adhesive overflow. The detection device includes a carrier mechanism, a laser detection mechanism, a moving mechanism, and a control device. The carrier mechanism is configured to hold a workpiece to be inspected. The laser detection mechanism includes a laser emitter and a laser detector. The laser emitter is configured to emit laser light at multiple detection points within the inspection area of ​​the workpiece. The laser detector is configured to detect laser light reflected back from the multiple detection points of the workpiece. The moving mechanism is connected to at least one of the carrier mechanism and the laser detection mechanism, and is configured to drive at least one of the carrier mechanism and the laser detection mechanism to move relative to each other. The control device is electrically connected to the moving mechanism and the laser detection mechanism. The control device is configured to control the moving mechanism to drive the laser detection mechanism and the carrier mechanism to move relative to each other, so that the laser emitter performs laser dotting at multiple detection points within the inspection area of ​​the workpiece to detect adhesive overflow, and the laser detection mechanism generates detection phase shift information. The control device is also configured to determine whether the detected phase shift information and the reference phase shift information meet preset conditions based on the detected phase shift information, and to determine that the workpiece under inspection has overflowed adhesive when the preset conditions are met.

[0007] Compared to existing technologies, this application employs a laser detection mechanism. A laser emitter emits a laser beam into the area to be inspected on the component, and a laser detector detects the reflected laser beam. A moving mechanism moves a supporting mechanism relative to the laser detection mechanism, causing it to generate detection phase shift information. By inspecting the display screen, it is determined whether the detected phase shift information and the reference phase shift information meet the glue overflow range, thus identifying whether glue overflow has occurred. Therefore, this application eliminates the need for destructive testing to inspect the glue overflow of the display screen, ensuring the structural stability and functional integrity of the product. This effectively promotes structural and process optimization and improves the problem of product malfunction caused by glue overflow. Furthermore, the thermal signal reflected by the medium at the detection point is converted into a stable phase shift value. When the medium changes, the phase shift value differs, indirectly reflecting the glue overflow condition inside the product. Therefore, the aforementioned laser detection mechanism does not damage the product and will not cause product defects.

[0008] In some embodiments of this application, determining whether the detected phase shift information and the reference phase shift information meet preset conditions, and determining that the workpiece under inspection has adhesive overflow when the preset conditions are met, includes determining the phase shift difference between the detected phase shift information and the reference phase shift information. It is then determined whether the phase shift difference meets a preset range, and the degree of adhesive overflow in the workpiece under inspection is determined.

[0009] In some embodiments of this application, determining the degree of adhesive overflow of the test piece by determining the preset range satisfied by the phase shift difference includes: determining multiple differences between each phase shift value of multiple detection points in the detection phase shift information and the corresponding reference detection value in the reference phase shift information, and determining the adhesive overflow level based on the multiple differences.

[0010] In some embodiments of this application, multiple differences are determined between each phase shift value at multiple detection points in the detected phase shift information and the corresponding reference detection value in the reference phase shift information, and the glue overflow level is determined based on the multiple differences. This includes: if the fluctuation range of the multiple differences is within a first preset fluctuation range, it is determined to be slight glue overflow; if the fluctuation range of the multiple differences is within a second preset fluctuation range, it is determined to be moderate glue overflow; if the fluctuation range of the multiple differences is within a third preset fluctuation range, it is determined to be severe glue overflow. Wherein, the first preset fluctuation range is smaller than the second preset fluctuation range, and the second preset fluctuation range is smaller than the third preset fluctuation range.

[0011] In some embodiments of this application, a camera mechanism is also included, configured to perform a first adhesive overflow detection on the area to be inspected to generate an inspection image. The control device is further configured to determine, based on the inspection image, whether an area of ​​adhesive overflow exists in the inspection image. When no adhesive overflow is found, a control movement mechanism drives the laser inspection mechanism and the carrier mechanism to move relative to each other, so that the laser emitter performs laser dotting on multiple inspection points in the area to be inspected on the workpiece, for a second adhesive overflow detection.

[0012] In some embodiments of this application, the control device is further configured to determine whether there is an adhesive overflow area in the detection image based on the detection image, including determining whether there is adhesive overflow by comparing the color changes of corresponding areas in the detection image and the reference image. When no adhesive overflow is found, the control device controls the moving mechanism to drive the laser detection mechanism and the supporting mechanism to move relative to each other, and performs a second adhesive overflow detection on the workpiece to be inspected. The workpiece to be inspected is a display screen, which contains a marker, and the area corresponding to the marker has adhesive. The control device is also configured to control the moving mechanism to drive the laser detection mechanism to make dots along a dotting path, the dotting path being consistent with the outline shape of the marker.

[0013] In some embodiments of this application, the dot-marking path includes a first laser path and a second laser path. The first laser path and the second laser path extend in the same direction. The distance d between the first laser path and the marker is 0.35 mm to 0.4 mm. In some embodiments of this application, the laser emitter emits for 1 s to 2 s at each detection point.

[0014] In some embodiments of this application, the radius of each detection point is 0.10 mm to 0.20 mm; and / or, the spacing D between adjacent detection points is 0.30 mm to 0.40 mm.

[0015] This application also provides a method for detecting adhesive overflow, including emitting lasers to multiple detection points in the inspection area of ​​a workpiece. The lasers reflected back from the multiple detection points are detected. Detection phase shift information is generated based on the reflected lasers. It is determined whether the detection phase shift information and reference phase shift information meet a preset condition, and if the preset condition is met, it is determined that adhesive overflow has occurred in the workpiece.

[0016] Compared with existing technologies, the adhesive overflow detection method provided in this application first emits lasers to multiple detection points in the inspection area of ​​the part to be inspected, detects the lasers reflected back from the multiple detection points of the part to be inspected, generates detection phase shift information, and determines whether the detection phase shift information and the reference phase shift information meet preset conditions. This solves the problem that the detection of adhesive overflow in the display screen requires destructive disassembly, and provides a guarantee for the structural stability and functional integrity of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an adhesive overflow detection device provided in this application.

[0018] Figure 2 yes Figure 1 A partially enlarged view of the glue overflow detection device.

[0019] Figure 3 yes Figure 2 An enlarged view of the supporting mechanism.

[0020] Figure 4 yes Figure 2 A top view showing the unlocked state of the load-bearing mechanism.

[0021] Figure 5 yes Figure 2 A top view showing the locked state of the load-bearing mechanism.

[0022] Figure 6 yes Figure 2 An exploded view of the moving mechanism in the diagram.

[0023] Figure 7 yes Figure 2 An exploded view of the glue overflow detection device.

[0024] Figure 8 This is a schematic diagram of the area to be inspected on the display screen.

[0025] Figure 9 This is a comparison chart of phase shift data before and after adhesive overflow on the display screen.

[0026] Figure 10 This is a phase shift diagram showing slight adhesive overflow on the display screen.

[0027] Figure 11 This is a phase shift diagram of moderate glue overflow on a display screen.

[0028] Figure 12 This is a phase shift diagram of a display screen with severe adhesive overflow.

[0029] Figure 13 This is a flowchart of a glue overflow detection method provided in this application.

[0030] Explanation of key component symbols:

[0031] Glue overflow detection device 100; workpiece to be inspected 10; bearing mechanism 20; moving mechanism 30; camera mechanism 40; laser detection mechanism 50; control device 60; laser emitter 501; laser detector 502; bearing plate 21; clamping mechanism 22; first positioning component 222; second positioning component 223; first clamping assembly 220; first clamping part 2202; handle 2203; first transmission rod 2204; second clamping assembly 221; second clamping part 2212; second transmission rod 2213; transmission component 23; third end 2203a; fourth end 2203b; first hinge part 2203c; first conveying component 301; second conveying component 302; marker 101; gap 102; detection point 103; area to be inspected 110.

[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also include a component that is centered on it. When a component is considered to be "set on" another component, it can be directly set on the other component or may also include a component that is centered on it.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Please see Figure 1 and Figure 2 This application provides an adhesive overflow detection device 100 for detecting whether adhesive overflow occurs on a workpiece 10 to be inspected. The adhesive overflow detection device 100 includes a support mechanism 20, a laser detection mechanism 50, a moving mechanism 30, and a control device 60. The support mechanism 20 is configured to hold the workpiece 10 to be inspected. The workpiece 10 to be inspected may be a display screen.

[0037] Please see Figure 3 In some embodiments, the supporting mechanism 20 includes a supporting plate 21 and a clamping mechanism 22 for fixing the display screen. The clamping mechanism 22 includes a sliding plate, a first positioning member 222, and a second positioning member 223. The sliding plate is slidably connected to the moving mechanism 30. The first positioning member 222 is disposed on the sliding plate and is used to position the workpiece 10 to be inspected in a first direction X. The second positioning member 223 is disposed on the sliding plate and is used to position the workpiece 10 to be inspected in a second direction Y, wherein the first direction X is perpendicular to the second direction Y.

[0038] The clamping mechanism 22 may further include a first clamping assembly 220, a second clamping assembly 221, and a transmission member 23. The first clamping assembly 220 includes a first clamping portion 2202, a handle 2203, and a first transmission rod 2204. The first clamping portion 2202 is movably disposed on the sliding plate relative to the first positioning member 222. One end of the first transmission rod 2204 passes through the first clamping portion 2202 and is hinged to the handle 2203. When the handle 2203 rotates around the first hinge portion 2203c, the first transmission rod 2204 drives the first clamping portion 2202 to move closer to and further away from the first positioning member 222, thereby locking and unlocking the workpiece 10 to be inspected. The second clamping assembly 221 includes a second clamping portion 2212 and a second transmission rod 2213. The second clamping portion 2212 is movably disposed on the sliding plate relative to the second positioning member 223, and the second transmission rod 2213 passes through the second clamping portion 2212. The transmission component 23 is hinged to the sliding plate and connected to the first clamping component 220 and the second clamping component 221 respectively. When the first clamping component 220 moves toward the first positioning component 222, the transmission component 23 drives the second clamping component 221 to move toward the second positioning component 223.

[0039] Please see Figure 4 and Figure 5 The handle 2203 includes a third end 2203a and a fourth end 2203b. The distance from the third end 2203a to the first hinge portion 2203c is less than the distance from the fourth end 2203b to the first hinge portion 2203c, so that when the handle 2203 rotates clockwise around the first hinge portion 2203c to the third end 2203a, it drives the first transmission rod 2204 to move closer to the first positioning member 222. When the handle 2203 rotates counterclockwise around the first hinge portion 2203c to the fourth end 2203b, it drives the first transmission rod 2204 to move away from the first positioning member 222.

[0040] Please see Figure 6 The moving mechanism 30 is connected to at least one of the carrying mechanism 20 and the laser detection mechanism 50. The moving mechanism 30 is configured to drive at least one of the carrying mechanism 20 and the laser detection mechanism 50 to move relative to each other. Through the moving mechanism 30, fully automated scanning of the workpiece 10 can be achieved, reducing the need for manual operation, lowering labor costs, and improving the uniformity and stability of the inspection. In some embodiments, the moving mechanism 30 includes a first conveyor 301 and a second conveyor 302. The carrying mechanism is slidably connected to the first conveyor 301, which is disposed along a first direction X. The second conveyor 302 is slidably connected to the first conveyor 301, which is disposed along a second direction Y and is used to move the first conveyor 301.

[0041] Please see Figure 7 The laser detection mechanism 50 includes a laser emitter 501 and a laser detector 502, please refer to the above. Figure 8 A laser emitter 501 is configured to emit a laser beam towards detection points 103 within the inspection area 110 of the workpiece 10. The laser emitter 501 can be a laser dotting device, which uniformly dots the inspection area 110 at the detection points 103, causing the inspection area 110 to exhibit a temperature rise. Laser technology can objectively and accurately capture minute changes on the surface of the workpiece 10, especially minute deformations or temperature changes related to adhesive overflow. This improves the accuracy of adhesive overflow detection and reduces missed detections and false positives. Under the action of laser dotting, a laser detector 502 is configured to detect the laser beam reflected back from the detection points 103 of the workpiece 10. The laser detector 502 detects changes on the surface of the inspection area 110 and the fluctuations in the detection data.

[0042] Please refer to the reference. Figure 1 The control device 60 is electrically connected to the moving mechanism 30 and the laser detection mechanism 50. The control device 60 is configured to control the moving mechanism 30 to drive the laser detection mechanism 50 and the supporting mechanism 20 to move relative to each other, so that the laser emitter 501 laser-marks multiple detection points 103 on the inspection area 110 of the workpiece 10, thereby generating detection phase shift information by the laser detection mechanism 50. The thermal signal reflected by the medium at the detection point 103 is converted into a stable phase shift value. When the medium changes (e.g., when adhesive overflow occurs), the phase shift value will differ. The phase shift value formed by the multiple detection points 103 is the aforementioned detection phase shift information. Therefore, the aforementioned detection phase shift information can indirectly reflect the adhesive overflow condition inside the workpiece 10. In some embodiments, as shown... Figure 8 Multiple detection points a1, b1, c1, d1, e1, f1, g1; a2, b2, c2, d2, e2, f2, and g2 are shown. Each detection point 103 is sequentially subjected to laser detection, generating a detection phase shift value. Referring to 9, in one example, when the medium remains unchanged (i.e., before adhesive overflow), the generated detection phase shift values ​​at different detection points 103 are above 2.36°. The differences between the detection phase shift values ​​at multiple detection points 103 and the phase shift values ​​in the reference phase shift information are small, and the fluctuations are relatively small. When the medium changes (i.e., after adhesive overflow), the detection phase shift values ​​generated at different detection points 103 decrease significantly, all falling below 2.33°. The differences between the detection phase shift values ​​at multiple detection points 103 and the phase shift values ​​in the reference phase shift information are large, and the fluctuations are relatively large. Therefore, by comparing the differences before and after adhesive overflow, it can be determined whether adhesive overflow exists in the inspected part 10.

[0043] The control device 60 is also configured to determine, based on the detected phase shift information, whether a preset condition is met between the detected phase shift information and reference phase shift information. If the condition is met, it is determined that adhesive overflow has occurred in the workpiece 10 under inspection. The reference phase shift information is the phase shift information of the workpiece 10 without adhesive overflow, which can be obtained by laser detection of the workpiece 10 without adhesive overflow. The control device 60 compares the phase shift information according to the preset condition to determine whether adhesive overflow exists. This allows the adhesive overflow detection device 100 to exhibit high consistency and reliability under different production environments or material conditions.

[0044] Compared to existing technologies, this application utilizes a laser detection mechanism 50. A laser emitter 501 emits a laser beam into the inspection area 110 of the workpiece 10, and a laser detector 502 detects the laser beam reflected from the detection point 103. A moving mechanism 30 moves the supporting mechanism 20 relative to the laser detection mechanism 50, causing the laser detection mechanism 50 to generate detection phase shift information. By determining whether the detected phase shift information and the reference phase shift information meet the glue overflow range, it is determined whether glue overflow has occurred. Therefore, this application does not require destructive testing to inspect the glue overflow of the workpiece 10, ensuring the structural stability and functional integrity of the product, effectively promoting structural process optimization and improvement, and avoiding corrosion of the touch circuit area due to glue overflow, which could cause functional defects. The thermal signal reflected by the medium at the detection point 103 is converted into a stable phase shift value. When the medium changes, the phase shift value differs, indirectly reflecting the glue overflow condition inside the product. This not only does not damage the product or cause defects, but also has low technical barriers, short development cycles, and saves resource and time costs.

[0045] In some embodiments, the example of the device under inspection 10 being a display screen will be used for illustration. Figure 8As shown, when the part to be inspected 10 is a display screen, there is a marker 101 inside the display screen, and the area corresponding to the marker 101 has adhesive. The marker 101 can be a connecting structure; that is, when the part to be inspected 10 is a display screen, the marker 101 serves as a connector between the display screen and the rear housing. In some embodiments, the marker 101 is foam. In some embodiments, after the display screen and the rear housing are glued and assembled, there is a gap 102 between the rear housing and the front panel screen. Adhesive may overflow into this area and corrode the lines of the front panel screen; it is necessary to ensure that no excess adhesive seeps into this area and corrodes the lines. Because this inspection location is inside the product, surrounded by the front panel screen and the rear housing, visual inspection is not possible; previously, inspection could only be done by disassembling the product for visual observation, which is destructive and cannot meet the requirements of full inspection in mass production. In some embodiments, a laser inspection mechanism 50 can be set to make dots along a dotting path, the dotting path being roughly consistent with the outline shape of the marker 101. The dotting path is the arrangement path of multiple inspection points 103. By setting the path of the dots, the area to be dotted can be reduced, because the markers can be structures such as foam with adhesive, which are the main areas where adhesive overflow is likely to occur. Therefore, when performing laser dotted detection, the detection is mainly carried out along the dotted area, and the area where adhesive overflow may occur can be quickly detected.

[0046] In one embodiment of this application, determining whether a preset condition is met between the detected phase shift information and the reference phase shift information, and determining that adhesive overflow has occurred in the test piece 10 when the preset condition is met, includes the following steps:

[0047] S100, Determine the phase shift difference between the detected phase shift information and the reference phase shift information.

[0048] The phase shift difference is the difference between the detected phase shift information and the reference phase shift information. The detected phase shift information is obtained by the laser detection mechanism 50 emitting a laser to the area 110 under inspection and receiving the reflected phase shift information through the laser detector 502. The reference phase shift information is obtained by performing laser detection on the under-inspection piece 10 without adhesive overflow using a similar method. The detected phase shift information includes the phase shift values ​​of multiple detection points 103, and the reference phase shift information includes the reference phase shift values ​​of multiple detection points 103.

[0049] When calculating the difference in phase shift values ​​between the detected phase shift information and the reference phase shift information, the difference between the phase shift value corresponding to each check point 103 and the reference phase shift value can be calculated. The difference between multiple check points 103 is the phase shift difference between the detected phase shift information and the reference phase shift information. The higher the phase shift difference, the greater the degree of adhesive overflow.

[0050] S200: Determine if the phase shift difference meets the preset range and determine the degree of adhesive overflow in the part to be inspected.

[0051] In some embodiments, there may be one or more preset ranges. In some embodiments, when there is one preset range, the preset range refers to the range of phase shift values ​​in which glue overflow occurs.

[0052] In some embodiments, if the phase shift difference meets a preset condition, the result is recorded and marked as non-conforming (NG). Simultaneously, subsequent processing steps can be triggered, such as marking as non-conforming, conducting further inspections, or issuing an alarm. The entire detection process enables efficient and accurate detection of excess adhesive. This not only improves the quality control level in the production process but also provides reliable data support for subsequent production and inspection processes. By systematically judging the state of the part to be inspected 10, potential quality problems can be identified and addressed in a timely manner, thereby reducing the defect rate and enhancing the product's market competitiveness.

[0053] Please see Figure 9 By setting multiple detection points 103 and sequentially performing laser dotting detection on these points before and after glue overflow, reference phase shift information is obtained. Points 1 to 10 represent the detection points before glue overflow, and points 11 to 20 represent the detection points after glue overflow. Points 1 to 10 correspond one-to-one with points 11 to 20. Data comparison shows a significant phase shift difference between before and after glue overflow. For example, the phase shift difference between points 1 and 11 in path 1-1 before and after glue overflow is 4.50°, indicating a significant degree of glue overflow. The presence of severe glue overflow can be determined by calculating the phase shift difference. Correspondingly, mild and moderate glue overflow can also be identified subsequently.

[0054] In another embodiment, the aforementioned preset range can be multiple. When multiple preset ranges exist, the multiple preset ranges refer to the range of phase shift values ​​corresponding to different degrees of adhesive overflow. At this time, S200 determines the preset range satisfied by the phase shift difference and determines the degree of adhesive overflow of the test piece, specifically including: determining multiple differences between each phase shift value of multiple detection points in the detection phase shift information and the corresponding reference detection value in the reference phase shift information, and determining the adhesive overflow level based on the multiple differences.

[0055] The level of glue overflow can be determined by comparing the phase shift values ​​at multiple detection points of the phase shift information with the corresponding reference detection values ​​in the reference phase shift information. For example, the phase shift values ​​at detection points a1, b1, c1, d1, e1, f1, g1, a2, b2, c2, d2, e2, f2, and g2 before and after detection are compared. The difference between the phase shift at each detection point and the corresponding phase shift in the reference phase shift information is then used. When glue overflow occurs, the phase shift difference at at least one detection point fluctuates; the greater the degree of glue overflow, the larger the range of fluctuation. It should be noted that when the fluctuation range of the multiple phase shift values ​​in the reference phase shift information is small, their average value can be taken as the reference phase shift value. That is, the multiple differences between the phase shift values ​​at multiple detection points of the phase shift information and the corresponding phase shift values ​​in the reference phase shift information can be the differences between the phase shift values ​​at multiple detection points of the phase shift information and the reference phase shift value.

[0056] In some implementations, multiple differences are determined between each phase shift value at multiple detection points in the detected phase shift information and the corresponding reference detection value in the reference phase shift information. The level of adhesive overflow is determined based on these multiple differences, including: if the fluctuation range of the multiple differences is within a first preset fluctuation range, it is determined to be slight adhesive overflow. The fluctuation range refers to the curve change between each difference point. When the workpiece 10 has slight adhesive overflow, it may be because some of the multiple differences have slight fluctuations; for example, the fluctuation range of the multiple differences is less than or equal to 1°. Please refer to [link to relevant documentation]. Figure 10 The phase shift difference between the phase shift information obtained from multiple detection points fluctuates around 1°. Due to the influence of thermal effects, there may be a very small number of points where the phase shift value of c1 is as high as 2.10° and the phase shift value of g2 is as high as 4.90°. These are a very small number of abnormal points that can be excluded from analysis.

[0057] When the fluctuation range of multiple differences falls within the second preset fluctuation range, it is determined to be moderate glue overflow. Specifically, when the inspected part 10 has moderate glue overflow, it may mean that most of the multiple differences exhibit moderate fluctuations; for example, the fluctuation range of multiple differences is greater than 1° and less than or equal to 3°. Please refer to [link / reference]. Figure 11 The phase shift values ​​of the detection phase shift information obtained from multiple detection points fluctuate around 1.50°.

[0058] When the fluctuation range of multiple differences falls within a third preset fluctuation range, it is determined to be severe adhesive overflow. Specifically, when the inspected part has severe adhesive overflow (e.g., 10), it may be that each of the multiple differences exhibits significant fluctuations, for example, the fluctuation range of multiple differences is greater than 3°. Please refer to [link / reference]. Figure 12The phase shift value of the phase shift difference between the detection phase shift information obtained from multiple detection points fluctuates around 3.90°. By dividing the reference phase shift difference into multiple preset ranges, the condition of the part under inspection 10 can be evaluated more precisely. This graded detection helps to more accurately identify different degrees of adhesive overflow, making the detection results more reliable. The systematic graded detection method enriches the data background, facilitating statistical analysis and trend judgment.

[0059] Among them, the first preset fluctuation range is smaller than the second preset fluctuation range, and the second preset fluctuation range is smaller than the third preset fluctuation range.

[0060] It should be noted that the reference phase shift information can be obtained by using the material before dispensing as a reference material and analyzing the corresponding detection points. The first preset fluctuation range is less than or equal to 1°, and slight adhesive overflow is typically located at the connection between the marker 101 on the lower part of the casing and the display screen. The overflow does not contact the casing; therefore, only a few points on the actual casing come into contact with the overflow.

[0061] Please see Figure 11 In one embodiment of this application, the second preset fluctuation range is greater than 1° and less than or equal to 3°. Moderate adhesive overflow is usually located on the back of the housing, and the thickness of the adhesive overflow is less than the thickness of the marker 101. That is, the fluctuation range of the phase shift value of the test piece 10 is large, and it overlaps with the range of the phase shift value of the reference phase shift information (i.e., the range of phase shift values ​​without adhesive overflow). The overlap of the ranges means that there is a numerical overlap between the phase shift difference of the second preset fluctuation range and the range of phase shift values ​​without adhesive overflow.

[0062] Please see Figure 12 In one embodiment of this application, the third preset fluctuation range is greater than 3°. Severe adhesive overflow typically occurs on the back of the casing, with the thickness of the overflow being approximately equal to the thickness of the marker 101. That is, the detected phase shift value of the test piece 10 is 3°-5° lower than the phase shift value of the reference phase shift information, a significant difference that can be clearly distinguished from no adhesive overflow.

[0063] Therefore, the default fluctuation range corresponding to different glue overflow levels can be determined based on the degree of glue overflow of different thicknesses. Different glue overflow thicknesses can be set to correspond to different degrees of glue overflow. For example, the first preset fluctuation range can be determined based on the first glue overflow thickness (the thickness can be less than 1 / 4 of the thickness of marker 101); the second preset fluctuation range can be determined based on the second glue overflow thickness (the thickness can be more than 2 / 4 to 3 / 4 of the thickness of marker 101); and the third preset fluctuation range can be determined based on the third glue overflow thickness (the thickness can be between 3 / 4 and 1 of the thickness of marker 101).

[0064] Please see Figure 1 and Figure 2In one embodiment of this application, the adhesive overflow detection device 100 further includes a camera mechanism 40 configured to perform a first adhesive overflow detection on the workpiece 10 to generate a detection image. The control device 60 is further configured to determine whether an adhesive overflow area exists in the detection image based on the detection image. When no adhesive overflow is detected, the control movement mechanism 30 drives the laser detection mechanism 50 and the carrier mechanism 20 to move relative to each other, so that the laser emitter 501 performs laser dotting on multiple detection points 103 of the inspection area 110 of the workpiece 10 to perform a second adhesive overflow detection. By setting the camera mechanism 40, it is possible to directly detect whether visually visible adhesive overflow occurs on the display screen, thereby rejecting products with visible adhesive overflow. Furthermore, when no adhesive overflow is detected, the control device 60 can move at least one of the carrier mechanism 20 or the laser detection mechanism 50 to accurately identify the inspection area based on visual guidance and uniformly dot the inspection area. In some embodiments, the camera mechanism 40 may include a charge-coupled device (CCD). The inspection piece 10 is scanned by the camera mechanism 40 under the movement of the moving mechanism 30.

[0065] In some embodiments, the camera mechanism 40 can determine whether there is excess adhesive by comparing the color changes of corresponding areas in the detection image and the reference image. When no excess adhesive is found, the control device 60 controls the moving mechanism 30 to drive the laser detection mechanism 50 and the supporting mechanism 20 to move relative to each other, and performs a second excess adhesive detection on the workpiece 10 to be inspected.

[0066] Please see Figure 8 In one embodiment of this application, the laser detection mechanism 50 includes a first laser path and a second laser path. The first and second laser paths extend in the same direction. The distance d between the first laser path and the marker 101 is 0.35 mm to 0.4 mm. By setting two laser paths with the same extension direction, the situation of accidental laser marking on the marker 101 can be effectively improved, increasing the reliability of the detected phase shift information. Setting the distance d between the first laser path and the marker 101 to 0.35 mm to 0.4 mm can improve the situation of accidental marking on the marker 101. In some embodiments, please refer to... Figure 8 The first laser path can be a1, b1, c1, d1, e1, f1, and g1, and the second laser path can be a2, b2, c2, d2, e2, f2, and g2. Please refer to the following: Figure 10 , Figure 11 and Figure 12When slight adhesive overflow occurs, the difference between the phase shift at multiple detection points 103 and the phase shift value in the reference phase shift information is very small, less than or equal to 1°, with only c1 and g2 exhibiting excessively large phase shift differences (interference can be eliminated). When moderate adhesive overflow occurs, the phase shift difference at each detection point 103 fluctuates, with the difference between the phase shift at each detection point 103 and the phase shift value in the reference phase shift information greater than 1° and less than or equal to 3°. When severe adhesive overflow occurs, the difference between the phase shift at each detection point 103 and the phase shift value in the reference phase shift information is greater than 3°.

[0067] In one embodiment of this application, the laser emitter 501 emits for 1 to 2 seconds at each detection point 103. This shorter emission time allows for phase shift to be achieved while preventing the laser from penetrating the back cover of the display screen.

[0068] In one embodiment of this application, the radius of each detection point 103 is 0.10 mm to 0.20 mm. By setting the radius of each detection point to 0.1 mm to 0.20 mm, damage to the back cover of the display screen can be prevented due to excessively large radii. And / or, the spacing between adjacent detection points is 0.30 mm to 0.40 mm, so that the laser points do not overlap, keeping the maximum fluctuation of phase shift between detection points within 0.5°, ensuring that different degrees of adhesive overflow can be covered and distinguished.

[0069] Please see Figure 13 This application also provides a method for detecting adhesive overflow, comprising the following steps:

[0070] Step S1: Emit lasers to multiple detection points 103 in the inspection area 110 of the workpiece to be inspected 10.

[0071] In some embodiments, the camera mechanism 40 can identify whether there is excess adhesive on the surface of the inspection area 110 of the workpiece 10. If excess adhesive is found, the workpiece 10 is rejected for subsequent steps. By first identifying excess adhesive in the inspection area 110 of the workpiece 10, products with visible excess adhesive can be directly rejected without the need for a further laser dotting step, thus reducing the cost of laser inspection.

[0072] Step S2: Detect the laser reflected back from multiple detection points 103 of the workpiece under inspection 10.

[0073] Step S3: Generate detection phase shift information based on the reflected laser, determine whether the detection phase shift information and the reference phase shift information meet the preset conditions, and determine that the workpiece 10 under inspection has overflowed adhesive when the preset conditions are met.

[0074] The adhesive overflow detection method provided in this application determines whether adhesive overflow has occurred by determining that the detected phase shift information and the reference phase shift information meet preset conditions, and when the preset conditions are met, it is determined that adhesive overflow has occurred in the test piece 10. Therefore, this application does not require destructive testing to inspect the adhesive overflow of the test piece 10, ensuring the structural stability and functional integrity of the product, effectively promoting structural process optimization and improvement, and avoiding corrosion of the touch circuit area due to adhesive overflow, which could cause functional defects. The thermal signal reflected by the medium at detection point 103 is converted into a stable phase shift value. When the medium changes, the phase shift value differs, indirectly reflecting the adhesive overflow condition inside the product. This method not only does not damage the product and will not cause product defects, but also has low technical barriers, short development cycles, and saves resource and time costs.

[0075] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and substance of the technical solutions of this application.

Claims

1. An adhesive overflow detection device for detecting adhesive overflow, characterized in that, The adhesive overflow detection device includes: The support mechanism is configured to hold the items to be inspected; A laser inspection mechanism, comprising a laser emitter and a laser detector, wherein the laser emitter is configured to emit laser light to a plurality of inspection points within an inspection area of ​​the workpiece to be inspected, and the laser detector is configured to detect laser light reflected back from the plurality of inspection points of the workpiece to be inspected. A moving mechanism, connected to at least one of the supporting mechanism and the laser detection mechanism, the moving mechanism being configured to drive at least one of the supporting mechanism and the laser detection mechanism to cause relative movement between the supporting mechanism and the laser detection mechanism; and A control device, electrically connected to the moving mechanism and the laser detection mechanism, is configured to control the moving mechanism to drive the laser detection mechanism and the carrying mechanism to move relative to each other, so that the laser emitter performs laser dotting on the plurality of detection points in the inspection area of ​​the workpiece to perform glue overflow detection, so that the laser detection mechanism generates detection phase shift information, and the control device is further configured to determine the phase shift difference between the detection phase shift information and reference phase shift information based on the detection phase shift information, determine a plurality of differences between each phase shift value of the plurality of detection points in the detection phase shift information and the corresponding reference detection value in the reference phase shift information, and determine the glue overflow level based on the plurality of differences.

2. The adhesive overflow detection device according to claim 1, characterized in that, The step of determining multiple differences between each phase shift value of multiple detection points in the detected phase shift information and the corresponding reference detection value in the reference phase shift information, and determining the glue overflow level based on the multiple differences, includes: If the fluctuation range of multiple differences is within the first preset fluctuation range, it is determined to be slight glue overflow; When the fluctuation range of multiple differences falls within the second preset fluctuation range, it is determined to be moderate glue overflow; When the fluctuation range of multiple differences falls within a third preset fluctuation range, it is determined to be severe glue overflow; Wherein, the first preset fluctuation range is smaller than the second preset fluctuation range, and the second preset fluctuation range is smaller than the third preset fluctuation range.

3. The adhesive overflow detection device according to claim 1, characterized in that, It also includes a camera mechanism configured to perform a first adhesive overflow detection on the surface of the area to be inspected in order to generate a detection image; The control device is further configured to determine whether there is an area of ​​glue overflow in the detection image based on the detection image. When no glue overflow occurs, the control device controls the moving mechanism to drive the laser detection mechanism and the carrying mechanism to move relative to each other, so that the laser emitter can perform laser dotting on multiple detection points in the area to be inspected of the workpiece, in order to perform a second glue overflow detection.

4. The adhesive overflow detection device according to claim 3, characterized in that, The step of determining whether there is an area of ​​adhesive overflow in the detection image based on the detection image includes: By comparing the color changes of corresponding areas in the detection image and the reference image, it is determined whether there is excess adhesive on the surface of the area to be inspected. When no adhesive overflow appears on the surface of the area to be inspected, the control device controls the moving mechanism to drive the laser detection mechanism and the supporting mechanism to move relative to each other to perform a second adhesive overflow detection on the part to be inspected; wherein, the part to be inspected is a display screen, the display screen has a marker, the area corresponding to the marker has adhesive, and the control device is also configured to control the moving mechanism to drive the laser detection mechanism to make dots along the dotting path, the dotting path being consistent with the outline shape of the marker.

5. The adhesive overflow detection device according to claim 4, characterized in that, The dotting path includes a first laser path and a second laser path, the first laser path and the second laser path extend in the same direction, and the distance d between the first laser path and the marker is 0.35mm to 0.4mm.

6. The adhesive overflow detection device according to claim 1, characterized in that, The laser emitter emits for 1 to 2 seconds at each detection point.

7. The adhesive overflow detection device according to claim 1, characterized in that, The radius of each detection point is 0.10 mm to 0.20 mm; and / or the spacing D between adjacent detection points is 0.30 mm to 0.40 mm.

8. A method for detecting adhesive overflow, characterized in that, Using the adhesive overflow detection device as described in any one of claims 1-7, the adhesive overflow detection method includes: Lasers are emitted towards multiple detection points in the inspection area of ​​the part to be inspected; Detecting the laser light reflected back from the plurality of detection points on the test piece; and Based on the reflected laser, phase shift information is generated to determine whether the detected phase shift information and the reference phase shift information meet a preset condition. When the preset condition is met, it is determined that the workpiece under inspection has excess adhesive.

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