An inspection device and method for display panel AOI

Abstract

This invention relates to an AOI (Automated Optical Inspection) device and method for display panels. The inspection device includes a mounting frame with a fixed fork, an optical film moving mechanism, and an AOI inspection mechanism mounted on it. The fixed fork carries the product to be inspected. The optical film moving mechanism is located on one side of the fixed fork and includes an optical film carrier and a moving component. The moving component and the optical film carrier are fixedly connected, and the moving component drives the optical film carrier to move above the fixed fork. The AOI inspection mechanism is fixedly mounted on one side of the fixed fork and includes an AOI optical engine and an optical engine moving component. By placing the AOI optical engine on a moving component with a long travel distance, AOI inspection of large-sized products is achieved. Simultaneously, the optical film moving mechanism enables the switching of optical films, effectively improving the imaging effect.

Description

Technical Field

[0001] This invention belongs to the field of display panel inspection, and particularly relates to an AOI inspection device and method for display panels. Background Technology

[0002] With the continuous development of technology, digital products such as smartphones and iPads are constantly being upgraded, and the display panel is a crucial component, directly determining the value of the product. The manufacturing process of an LCD screen involves multiple steps, including wafer expansion, dispensing, glue preparation, pressure welding, and sealing. After processing, the LCD screen also requires testing to evaluate its photoelectric parameters and verify that its dimensions meet standards.

[0003] AOI (Automated Optical Inspection) is a device that detects surface defects in workpieces based on optical principles. During inspection, a camera automatically scans the workpiece, acquiring images. The image data is then compared with acceptable parameters in a database. After image processing, defects are detected, and finally displayed or marked on a monitor or with automatic indicators for subsequent correction. In existing technologies, the travel of the moving components in the AOI inspection mechanism is relatively small, making it unsuitable for larger products. Existing technologies typically only perform one AOI inspection without an optical film, resulting in poor image quality in subsequent stages. While some existing technologies incorporate filter switching mechanisms, they are only suitable for smaller filters and cannot be applied to the inspection of large-sized products.

[0004] Therefore, there is a need to find an AOI inspection mechanism with a large travel moving component to meet the needs of AOI inspection of large-size products; at the same time, it is also necessary to realize the switching of large-size filter films to effectively improve the subsequent imaging effect of the AOI inspection device and method. Summary of the Invention

[0005] In view of all or part of the deficiencies of the prior art described above, the purpose of this invention is to provide an AOI inspection device and method for display panels, which realizes AOI inspection of large-size products by setting the AOI optical engine on a moving component with a long stroke; at the same time, the switching of optical films is realized by setting an optical film moving mechanism, which effectively improves the imaging effect.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: An AOI inspection device for display panels is provided, comprising a mounting frame, on which a fixed tooth fork, an optical film moving mechanism, and an AOI inspection mechanism are mounted; the fixed tooth fork carries the product to be tested and is fixedly mounted on the mounting frame; the optical film moving mechanism includes a moving component and an optical film carrier disposed on the moving component, the moving component driving the optical film carrier to move above the fixed tooth fork; the AOI inspection mechanism is fixedly mounted on one side of the fixed tooth fork and includes an AOI optical engine and an optical engine moving component, the optical engine moving component driving the AOI optical engine to move and complete product inspection. The beneficial effects of this technical solution are that by setting up an AOI inspection mechanism and using the optical engine moving component to drive the AOI optical engine to move and complete the AOI inspection of the product to be tested; by adding an optical film moving mechanism to the setup, after AOI inspection of the product, the filter can be switched through the optical film moving mechanism, and the product to be tested can be re-inspected while the optical film is present, thereby effectively improving the subsequent imaging effect and improving the inspection quality.

[0007] The moving component includes a lead screw and an auxiliary guide rail, which are arranged in parallel. The optical film carrier is slidably connected to the lead screw and the auxiliary guide rail. The beneficial effect of this technical solution is that by setting a lead screw and slidingly mounting the optical film carrier on it, the purpose of filter switching is achieved by using the lead screw to drive the optical film carrier to move; and by adding an auxiliary guide rail, which is parallel to the lead screw, the optical film carrier moves smoothly.

[0008] The optical film carrier includes a carrier platform and an auxiliary component. The carrier platform and the auxiliary component are hinged on one side, and the other side of the auxiliary component is indirectly connected to the carrier platform via a lifting component. By setting up the carrier platform, the optical film (filter) is placed on it and covered over the product under test during AOI inspection to improve subsequent imaging quality. By setting up the auxiliary component, which is hinged to one side of the carrier platform and connected to the other side via the lifting component, when the optical film carrier moves towards the fixed tooth fork, the lifting component raises the side of the optical film carrier closest to the fixed tooth fork to avoid the fixed tooth fork in front and the product under test placed on it. Through the above configuration, when the optical film is not needed, the optical film carrier can be placed parallel to the back of the fixed tooth fork, effectively improving space utilization.

[0009] Preferably, the lifting component is a lifting cylinder or a component with lifting function.

[0010] The support platform is a hollow frame with an embedded optical film, and it is positioned above the auxiliary component. Both the support platform and the auxiliary component are frames, which reduces material usage and lowers equipment manufacturing costs; at the same time, they have the same shape, so as to achieve the purpose of covering the auxiliary component with the support platform.

[0011] The AOI inspection mechanism also includes an optomechanical mounting frame. The optomechanical moving component is fixedly mounted on the mounting frame. The optomechanical moving component includes an X-axis, a Y-axis, and a Z-axis. The Y-axis is slidably mounted on the X-axis, and the X-axis is slidably mounted on the Z-axis. The AOI optomechanical unit is fixedly connected to the Y-axis. By setting the optomechanical mounting frame and fixing the optomechanical moving mechanism thereon, which is vertically mounted on the mounting frame behind the fixed tooth fork, space is effectively utilized. By setting the X-axis, Y-axis, and Z-axis in the optomechanical moving component, the AOI optomechanical unit mounted on it can move in the X, Y, and Z directions to achieve AOI inspection of the product under test.

[0012] A balancing component is also fixedly installed on the optical engine mounting bracket, and the balancing component is located on one side of the Z-axis; the stroke of the Z-axis is greater than 100cm. The beneficial effect of this technical solution is that, since the product size detected by the AOI detection setup in this disclosure is relatively large, a Z-axis with a long stroke is required; and since the Z-axis in this disclosure has a long stroke, a balancing component is installed on one side of it to maintain the stability of its operation.

[0013] The balancing component is a first auxiliary guide rail, and the stroke of the first auxiliary guide rail is the same as the stroke of the Z-axis.

[0014] The fixed tooth fork is placed at one end of the mounting bracket, and the AOI inspection mechanism is vertically fixed on the mounting bracket on the side away from the fixed tooth fork. The advantage of this technical solution is that by placing the fixed tooth fork at one end of the mounting bracket, placing the optical film carrier on the mounting bracket on the side of the fixed tooth fork, and vertically setting the AOI inspection mechanism on the mounting bracket on the side away from the fixed tooth fork, the layout is optimized, effectively improving space utilization.

[0015] The fixed toothed fork is equipped with a vacuum suction cup and a sensor.

[0016] An AOI (Automated Optical Inspection) method for display panels includes the following steps: S1, placing the product under test (DUT) on a fixed toothed fork based on a reference line, and moving the AOI optical engine (AOI) with a moving component to move it above a first side of the DUT for inspection; S2, moving the AOI with the moving component to move it above a second side of the DUT for inspection; the second side is opposite to the first side; S3, moving the Z-axis to raise the AOI with the moving component to move an optical film carrier to cover the fixed toothed fork; S4, moving the AOI with the moving component to move the AOI with the moving component to the first side of the DUT for inspection; repeating step S2 to complete the inspection of the DUT. The beneficial effect of this technical solution is that the product to be tested is fed onto the fixed toothed fork. Without an optical filter, the AOI optical engine is driven by the moving component to move to the upper left side of the product to inspect the left side of the product. Then, the AOI optical engine moves to the upper right side of the product to inspect the right side of the product. After that, the Z-axis moves the AOI optical engine to rise to make room for the optical film carrier behind it. The moving component then drives the optical film carrier to move to the upper left side of the fixed toothed fork, and the first AOI inspection step is repeated. With the optical film present, both sides of the product to be tested are inspected. This method effectively improves the imaging quality of product inspection.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: 1) By setting an optical film moving mechanism, after AOI inspection of the product, the filter can be switched through the optical film moving mechanism, and the product to be tested can be re-inspected in the presence of the optical film, so as to effectively improve the subsequent imaging effect and improve the inspection quality; 2) By setting a Z-axis with a long stroke, the needs of AOI inspection of large-size products can be met, and auxiliary parts are set parallel to one side of the Z-axis to ensure the stable operation of the equipment; 3) By placing the fixed tooth fork at the front of the mounting frame, placing the optical film carrier on the mounting frame directly behind the fixed tooth fork, and setting the AOI inspection mechanism vertically at the rear of the mounting frame, the layout is optimized and the space utilization is effectively improved. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of Embodiment 1 of the present invention. The arrows in the diagram indicate the direction of movement of the optical film moving mechanism.

[0020] Figure 2 for Figure 1 A three-dimensional diagram from another perspective.

[0021] Figure 3 for Figure 1 A schematic diagram of the fixed tooth fork structure.

[0022] Figure 4 for Figure 1 A top view of the optical film moving mechanism.

[0023] Figure 5 for Figure 4 A schematic diagram of the three-dimensional mechanism.

[0024] Figure 6 for Figure 1 A side view of the optical film moving mechanism.

[0025] Figure 7 for Figure 5 Enlarged schematic diagram of a local part of the structure.

[0026] Figure 8 for Figure 1 A three-dimensional structural diagram of an AOI (Automated Guided Inspection) institution.

[0027] Reference numerals: 1-Mounting bracket; 10-Mounting platform; 101-Shock damping pad; 2-Fixing toothed fork; 210-Fixing fork; 211-Sensor; 212-Vacuum suction cup; 3-Optical film moving mechanism; 301-Lead screw; 302-Servo motor; 303-Auxiliary guide rail; 304-Lead screw cable chain; 3041-Cable chain fixing bracket; 305-Mounting sheet metal; 310-Optical film carrier; 311-Elastic connection Components; 3110-Scale; 3111-Scale; 312-Lifting cylinder; 313-Optical film; 314-Rotating shaft; 315-Bearing platform; 316-Auxiliary components; 4-AOI inspection mechanism; 41-AOI optical engine; 42-Optical engine moving assembly; 421-Optical engine mounting bracket; 422-First auxiliary guide rail; 423-Z moving axis; 424-X moving axis; 425-Y moving axis; 5-Product. Detailed Implementation

[0028] The technical solutions in specific embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0029] Example 1

[0030] This embodiment provides an AOI detection device for display panels, such as... Figure 1 and Figure 2 As shown, the device includes a mounting frame 1, on which a fixed toothed fork 2, an optical film moving mechanism 3, and an AOI detection mechanism 4 are mounted. Figure 1 In the example, the fixed tooth fork 2 is positioned at the front of the mounting frame 1, the optical film moving mechanism 3 is positioned on the mounting frame 1 directly behind the fixed tooth fork 2, and the AOI detection mechanism 4 is vertically positioned at the rear of the mounting frame 1. This arrangement maximizes space utilization and effectively improves space efficiency. In a better example, the fixed tooth fork 2, the optical film moving mechanism 3, and the AOI detection mechanism 4 are positioned on the mounting platform 10. In this embodiment, the mounting platform 10 is a marble platform, and a shock-absorbing pad 101 is also provided between the mounting frame 1 and the marble platform. In this embodiment, the shock-absorbing pad 101 is distributed at the four corners of the mounting platform. In other embodiments, the shock-absorbing pad 101 can also be a large square structure, and is not limited thereto.

[0031] Among them, by Figure 3 It is known that the fixed tooth fork 2 includes 5 identical fixed forks 210. Vacuum suction cups 212 for adsorbing product 5 are provided on the three middle fixed forks 210, and the vacuum suction cups 212 are arranged in a square. A sensor 211 for sensing whether product 5 is placed on the fixed tooth fork is also provided on the middle fixed fork 210.

[0032] In this embodiment, as Figure 4-6 As shown, the optical film moving mechanism 3 includes an optical film carrier 310 and a moving assembly. The moving assembly includes a lead screw 301, a lead screw fixing frame, and a servo motor 302. The lead screw 301 is fixed to the lead screw fixing frame and driven by the servo motor 302. The lead screw fixing frame is fixedly mounted on the mounting platform 10 on the left or right side of the fixed tooth fork 2. A lead screw drag chain 304 for storing lines and air pipes is also provided on one side of the lead screw 301. The lead screw 301 and the lead screw drag chain 304 are fixedly connected by a drag chain mounting sheet metal 305. In this embodiment, an auxiliary guide rail 303 is symmetrically arranged on one side of the lead screw 301. A slider is provided on the auxiliary guide rail 303. The optical film carrier 310 is fixedly connected to the slider and slides along the auxiliary guide rail 303. By arranging the auxiliary guide rail 303 parallel to the lead screw 301, the optical film carrier 310 located on it maintains stable movement, ensuring the orderly operation of the equipment. Of course, in other embodiments, the optical film carrier 310 can be made to ensure stable operation by providing lead screws 301 on both sides below the optical film carrier 310, or other components that can achieve this purpose can be used, which are not limited here.

[0033] The optical film carrier 310 includes a carrier platform 315 and an auxiliary component 316. Specifically, in this embodiment, the carrier platform 315 is a hollow rectangular frame, which can be made of steel or other materials with a certain degree of hardness. An optical film 313 (the optical film here includes the mold body and the optical glass used to support the mold body) is embedded in the middle of the rectangular frame. The auxiliary component 316 is a rectangular hollow frame with the same shape and size as the carrier platform 315. The material used for its frame can be the same as or different from that of the carrier platform 315. Of course, in other embodiments, the shape and size of the auxiliary component 316 may be different from those of the carrier platform 315, as long as it meets the purpose of this invention. In this embodiment, the carrier platform 315 covers the auxiliary component 316. The rear sides of the carrier platform 315 and the auxiliary component 316 are hinged by a long strip-shaped rotating shaft 314, and their front sides are connected by a lifting component. In this embodiment, the lifting component is a lifting cylinder 312, which is located in the middle of the front side of the support platform 315 and the auxiliary component 316. More specifically, its fixed end is fixedly connected to the auxiliary component 316, and its output end is fixedly connected to the support platform 315. Furthermore, elastic connectors 311 are provided on the left and right sides of the optical film support component 310. One end of the elastic connector 311 is fixedly connected to the auxiliary component 316, and the other end is elastically connected to the support platform 315. More specifically, the optical film support component 310 is fixedly connected to the lead screw 301 and the slider on the auxiliary guide rail 303 through the elastic connector 311. Figure 7 As shown, a scale 3110 is also provided on the outside of the elastic connector 311, and a ruler 3111 is also provided on the left and / or right side of the bearing platform 315 near the elastic connector 311. The ruler 3111, together with the scale 3110, can display the height of the bearing platform 315 during its movement, which is convenient for control and adjustment in actual work.

[0034] In this embodiment, initially, the optical film carrier 310 in the optical film moving mechanism 3 is located on the mounting platform 10 directly behind the fixed tooth fork 2. When it is necessary to switch the optical film 313, the servo motor 302 drives the lead screw 301 to move, causing the optical film carrier 310 located on it to move along the lead screw 301 and the auxiliary guide rail 303 towards the fixed tooth fork 2. When the optical film carrier 310 starts to move, the lifting cylinder 312 extends, driving the carrier platform 315 connected to its output end to move upward. With the cooperation of the rotating shaft 314, the side of the optical film carrier 310 closest to the fixed tooth fork 2 is lifted upward by a certain height, such as 5mm or 6mm, etc. The specific height can be set according to actual needs and is not limited here. Through the above steps, the front side of the optical film carrier 310 is lifted to avoid the fixed tooth fork 2 in front and the product to be tested 5 located on it, ensuring smooth operation of the equipment. After the optical film carrier 310 moves to directly above the fixed tooth fork 2 (i.e., the optical film carrier 310 covers the fixed tooth fork 2), the lifting cylinder 312 retracts, causing the carrier platform 315, which is fixedly connected to its output end, to descend to the initial position, maintaining a horizontal state and completing the switching of the optical film 313.

[0035] Of course, in some embodiments, the optical film moving mechanism 3 can also be set on the mounting bracket 1 on the left or right side of the fixed tooth fork 2, and the moving component is set on the mounting bracket 1 on the upper and lower sides of the fixed tooth fork 2. When product testing is required in the presence of the optical film, the moving component drives the optical film carrier 310 to move from the left or right side of the fixed tooth fork 2 to the right or left side of the fixed tooth fork 2 until the optical film carrier 310 covers the fixed tooth fork 2.

[0036] The AOI inspection mechanism 4 is mounted on the mounting platform 10 behind the optical film moving mechanism 3. Specifically, as follows: Figure 8 As shown, it includes an AOI optical engine 41, an optical engine moving assembly 42, and an optical engine mounting frame 421. In this embodiment, the optical engine mounting frame 421 is generally L-shaped and is vertically fixed on the mounting platform 10. The optical engine moving assembly 42 includes an X-axis moving axis 424, a Y-axis moving axis 425, and a Z-axis moving axis 423. Specifically, the Z-axis moving axis 423 is fixedly mounted on the Z-axis support of the optical engine mounting frame 421, the X-axis moving axis 424 is slidably mounted on the Z-axis moving axis 423, the Y-axis moving axis 425 is slidably mounted on the X-axis moving axis 424, and the AOI optical engine 41 is slidably mounted on the Y-axis moving axis 425.

[0037] In this embodiment, the Z-axis 423 has a relatively long travel (175cm). To ensure the smooth movement of the AOI optical engine 41, a balancing component is also provided on the Z-axis bracket of the optical engine mounting frame 421. In this embodiment, the balancing component is a first auxiliary guide rail 422, which is arranged side by side with the Z-axis 423. The X-axis 424 slides simultaneously on both the first auxiliary guide rail 422 and the Z-axis 423. Of course, in some embodiments, two Z-axis 423s can be arranged in parallel to achieve stable movement of the AOI optical engine 41. By setting a Z-axis 423 with a long travel, AOI inspection of large-sized products such as 200*100mm-450*900mm can be achieved. In addition, cable chains for accommodating cables are provided on one side of the X-axis 424, Y-axis 425, and Z-axis 423 to keep the overall equipment neat.

[0038] In this embodiment, since the optical film carrier 310 is located behind the mounting platform 10 in the initial state, in order to avoid this component and improve space utilization, the present disclosure provides an initial fixed height at the lower end of the optical engine mounting frame 421, and the Z-axis moving axis 423 is set from this initial fixed height.

[0039] Example 2

[0040] Based on the device disclosed in Embodiment 1, this embodiment provides a method for AOI inspection of display panels, which includes the following steps: S1, the product to be tested 5 is fed onto the fixed tooth fork 2, and the product to be tested 5 is vacuum-adsorbed by the vacuum suction cup set on the fixed tooth fork 2, so that the product to be tested 5 is fixed on the fixed tooth fork 2; thereafter, when the sensor set on the fixed tooth fork 2 senses that there is a product 5 on it, the information is fed back to the external control device, and the external device drives the AOI inspection mechanism 4 to move after receiving the information. Specifically, the X-axis 424 moves to move the AOI optical machine 41 to the upper left side of the product under test 5, and after alignment and correction by the X-axis 424 and Y-axis 425, the AOI optical machine 41 is used to inspect the left side (i.e., the left half of the screen) of the product under test 5; S2, after the left side inspection is completed, the X-axis 424 moves to move the AOI optical machine 41 to the upper right side of the product under test 5, and after alignment and correction by the X-axis 424 and Y-axis 425, the AOI optical machine 41 is used to inspect the right side of the product under test 5.

[0041] S3, after the left and right sides of the product under test 5 are inspected, the Z-axis 423 drives the AOI optical engine 41 to rise to a predetermined height (pre-set according to the product size), and the optical film moving mechanism 3 starts to move. Of course, in some embodiments, the rising of the AOI optical engine 41 and the moving of the optical film moving mechanism 3 can be carried out simultaneously. Specifically, the lifting cylinder 312 extends to raise the support platform 315. With the cooperation of the rotating shaft 314, the front side of the optical film support 310 (i.e., the side near the fixed tooth fork 2) is raised to a certain height (the specific height is set according to the size of the product 5 to be tested, such as 5mm or 4mm). After that, the servo motor 302 drives the lead screw 301 to move, causing the optical film support 310 to move along the lead screw 301 and the auxiliary guide rail 303 towards the fixed tooth fork 2 until the entire optical film support 310 is located directly above the fixed tooth fork 2 (i.e., the optical film support 310 covers the product 5 adsorbed on the fixed tooth fork 2). The lifting cylinder 312 retracts to lower the support platform 315 to the initial height, so that the support platform 315 and the auxiliary component 316 are parallel and in a horizontal state, completing the switching of the optical film 313.

[0042] S4, the X-axis 424 moves, causing the AOI optical machine 41 to move to the upper left side of the product under test 5. After alignment correction via the X-axis 424 and Y-axis 425, the AOI optical machine 41 inspects the left side (i.e., the left half of the screen) of the product under test 5 in the presence of the optical film 313. S2, after the left side inspection is completed, the X-axis 424 moves, causing the AOI optical machine 41 to move to the upper right side of the product under test 5. After alignment correction via the X-axis 424 and Y-axis 425, the AOI optical machine 41 inspects the right side of the product under test 5 in the presence of the optical film 313. Through the above steps, two inspections of the product under test 5 are completed: one without the optical film 313 and one with the optical film 313 present. Combining the images obtained from the two inspections makes the inspection results more accurate. In addition, the above steps enable the inspection of the left and right sides of the product 5 separately, meeting the requirements of AOI inspection for large-size products.

[0043] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An AOI detection device for a display panel, characterized in that, Including the mounting frame (1), the mounting frame (1) is provided with fixed prongs (2), optical film moving mechanism (3) and AOI detection mechanism (4); The fixed prongs (2) are used for carrying the product to be measured; The optical film moving mechanism (3) is provided on one side of the fixed prongs (2), including a moving assembly and an optical film carrier (310) provided on the moving assembly, the moving assembly drives the optical film carrier (310) to move above the fixed prongs (2); The side of the optical film carrier (310) close to the fixed prongs (2) is provided with a lifting piece, when the optical film carrier (310) starts to move, the lifting piece lifts the side of the optical film carrier (310) close to the fixed prongs (2) to a certain height, after the optical film carrier (310) covers above the fixed prongs (2), the lifting piece returns to the initial position; The AOI detection mechanism (4) is fixedly installed on one side of the fixed prongs (2), including AOI light machine (41) and light machine moving assembly (42), the light machine moving assembly (42) drives the AOI light machine (41) to move to complete product detection, the light machine moving assembly (42) is provided with an initial fixed height, and the stroke in the Z axis direction is greater than 100 cm; The moving assembly includes a lead screw (301) and an auxiliary guide rail (303), the lead screw (301) and the auxiliary guide rail (303) are arranged in parallel, and the optical film carrier (310) is slidably connected to the lead screw (301) and the auxiliary guide rail (303) on both sides. 2.The AOI detection device for a display panel according to claim 1, wherein, The optical film carrier (310) includes a bearing platform (315) and an auxiliary part (316), one side of the bearing platform (315) and the auxiliary part (316) is hinged, and the other side of the auxiliary part (316) is indirectly connected with the bearing platform (315) through the lifting piece. 3.The AOI detection device for display panel of claim 2, wherein, The bearing platform (315) is a hollow frame body with an embedded optical film, and the auxiliary part (316) is arranged below the bearing platform (315).

4. The AOI detection device for display panel according to claim 1, wherein, The AOI detection mechanism (4) further includes a light machine mounting frame (421), the light machine moving assembly (42) is fixedly installed on the light machine mounting frame (421), the light machine moving assembly (42) includes a Z moving shaft (423), an X moving shaft (424) and a Y moving shaft (425), the Y moving shaft (425) is slidably arranged on the X moving shaft (424), the X moving shaft (424) is slidably arranged on the Z moving shaft (423), and the AOI light machine (41) is slidably connected with the Y moving shaft (425).

5. The AOI detection device for display panel according to claim 4, wherein, The light machine mounting frame (421) is further provided with a balancing piece, and the balancing piece is arranged on one side of the Z moving shaft (423).

6. The AOI detection device for display panel according to claim 5, wherein, The balancing piece is a first auxiliary guide rail (422), and the stroke of the first auxiliary guide rail (422) is the same as the stroke of the Z moving shaft (423).

7. The AOI detection device for display panel according to claim 1, wherein, The fixed fork (2) is placed at one end of the mounting frame (1), and the AOI detection mechanism (4) is vertically fixed on the mounting frame (1) away from the fixed fork (2).

8. An AOI detection method for a display panel, characterized in that, The device is implemented based on any one of claims 4-6, Comprising the following steps, S1, the product to be tested is placed on the fixed fork (2) based on the reference line of the fixed fork (2), and the optical machine moving assembly (42) drives the AOI optical machine (41) to move above the first side of the product to be tested for detection; S2, the optical machine moving assembly (42) drives the AOI optical machine (41) to move above the second side of the product to be tested, which is away from the first side; S3, the Z moving shaft (423) drives the AOI optical machine (41) to rise, and the moving assembly drives the optical film carrier (310) to move and cover above the fixed fork (2); S4, the optical machine moving assembly (42) drives the AOI optical machine (41) to move to the first side of the product to be tested for detection; repeat step S2 to complete the detection of the product to be tested.

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