Display screen surface inspection equipment and process based on low-loss alignment clamping

Abstract

The present invention discloses a display screen inspection device and process based on low-loss alignment and clamping, the device comprising a carrier, a transfer unit, a front lighting detection unit, a back appearance detection unit, an electrostatic eliminator and a plurality of auxiliary light sources. On the one hand, the present invention is based on the lifting of the rolling support formed by the ball and the synchronous retraction and alignment of the sides to achieve low-wear alignment and clamping of the display screen. At the same time, due to space layout limitations, based on the display screen being separated from the table panel, the viewing angle formed upward from the detection window covers the back appearance detection surface to meet the requirements of one-time clamping and needle mold alignment, synchronous front lighting detection and back appearance detection; on the other hand, based on the cooperation of auxiliary light and ion wind, static electricity is removed while neutralizing the surface static charge and blowing away loose dust. The auxiliary light used will mark the coordinates of the dust that is difficult to remove. At the same time, the area corresponding to the dust coordinates is automatically shielded in the acquired image to eliminate the negative impact of the detection results caused by dust and static electricity.

Description

Technical Field

[0001] The present invention belongs to the technical field of display screen detection, and in particular relates to a display screen surface inspection device based on low-loss alignment clamping, and also relates to a display screen surface inspection process based on low-loss alignment clamping. Background Art

[0002] At present, the inspection of display screens mainly includes front lighting inspection and back appearance inspection (cracks, damage, missing, etc.). The lighting and appearance inspections are basically carried out in batches, and the lighting inspection process basically includes alignment clamping, transfer, and alignment circuit connection. During the lighting of the front of the display screen, the image is captured based on the camera, and the lighting performance is determined based on the acquired image. At the same time, after completing the lighting test, the display screen needs to be removed and flipped over, and then the camera captures the image, and the appearance performance of the back of the display screen is determined based on the acquired image.

[0003] Therefore, the above-mentioned face-to-face inspection process has the following technical defects:

[0004] 1) Because the front lighting inspection and the back appearance inspection cannot be performed simultaneously, not only is the efficiency of the front inspection low, but the probability of accidental scratches on the display screen increases during the inspection process;

[0005] 2) Whether it is front lighting inspection or back appearance inspection, alignment adjustment is required. During the alignment adjustment process, friction between the display and the carrier will definitely occur. Therefore, the probability of wear is very high, which in turn increases the NG rate (failure rate) of the display.

[0006] 3) Whether it is front lighting inspection or back appearance inspection, a camera is required to capture images. If there is dust on the surface of the display, bright spots, dark spots, line defects, etc. will appear during the inspection. At the same time, static electricity on the display will interfere and cause control signal disorder, resulting in flickering of the display, distorted images, or failure to light up, etc. Therefore, dust and static electricity will directly affect the effectiveness of the surface inspection. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved display screen surface inspection device based on low-loss alignment clamping.

[0008] At the same time, the present invention also relates to a display screen surface inspection process based on low-loss alignment clamping.

[0009] To achieve the above object, the present invention adopts the following scheme:

[0010] A display screen inspection device based on low-loss alignment clamping includes a carrier, a transfer unit, a front lighting inspection unit and a back appearance inspection unit, in particular,

[0011] The carrier includes a table panel forming a detection window, a lifting module arranged around the detection window, an alignment module that moves along the sides of the detection window with the center of the detection window as a reference, and a touch module that is aligned one by one with the alignment points of each alignment module, wherein the detection window area is S1, the front light-up detection screen display area is S2, and the back appearance detection area is S3, where S2>S3>S1; each touch module is synchronized with each alignment point and cooperates with the lifting module to ensure that the display screen is synchronously aligned during lifting; the top support surface of the lifting module is composed of multiple ball bearings with flush top surfaces, and based on the display screen being lifted off the table panel, the viewing angle formed from the detection window upwards covers the back appearance detection surface;

[0012] The front lighting detection unit and the back appearance detection unit are aligned up and down and are respectively located at the top and bottom of the detection station. The front lighting detection unit includes an alignment platform forming an alignment window, a needle mold mechanism, an alignment power component, and a front image acquisition component; the back appearance detection unit includes a back image acquisition component, and the display screen surface inspection equipment also includes an electrostatic eliminator based on ion gas to eliminate static electricity on the surface of the display screen, and multiple auxiliary light sources, wherein the multiple auxiliary light sources include a front dust removal group and a back dust removal group. The front dust removal group forms different angles from the alignment window and the intersecting light beams cover the front lighting detection screen. The back dust removal group forms different angles from the detection window and the intersecting light beams cover the back appearance detection surface. Based on the cooperation of the airflow and the auxiliary light, an airflow is formed to blow away the loose dust on the front and back of the display screen. The dust information on the front and back of the display screen is located based on the auxiliary light, and the front image acquisition component and the back image acquisition component synchronously obtain the automatic shielding dust area information in the image.

[0013] Preferably, in the downward orthographic projection of the table panel, the lifting module is arranged in the area between the edge of the display screen and the edge of the detection window to avoid the lifting module causing obstruction to the back appearance detection surface.

[0014] According to a specific implementation and preferred aspect of the present invention, a plurality of slide grooves extending along the direction of the alignment movement are provided on the table panel, each slide groove having a proximal end close to the detection window and a distal end away from the detection window, and the lifting module includes a top support module that is arranged based on the proximal end of the slide groove and can slide up and down, and a ball formed on the top of the top support module and flush with the top surface. The design based on the slide groove not only meets the layout requirements of the alignment module, but also enables the layout of the lifting module and the touch module. Moreover, the main technical purposes of the setting of the ball are: a) forming rolling friction to reduce the damage rate of the back of the display screen; b) in the alignment movement, due to the free guide formed, the occurrence rate of the side material of the display screen is effectively reduced; c) as the alignment points converge, the auxiliary display screen is adjusted for alignment in a gradually smaller area.

[0015] Preferably, each support module has a notched corner at its base. The trigger module includes a contact module that corresponds to each support module and slides within a slot. The ends of the contact modules form contact tips that align with the notched corners. The contact tips and notched corners cooperate to drive the display screen to lift, disengage, or reset and unload from the tabletop. Here, a sloped, interlocking mechanism is employed for lift adjustment, enabling rapid alignment of the display screen from the tabletop.

[0016] According to a specific implementation and preferred aspect of the present invention, the alignment module includes an alignment rod extending along the length direction of the slide groove and arranged one by one, an alignment module located at the end of each alignment rod and sliding in the slide groove, and an alignment power device driving the alignment rod to move along its own length direction, wherein the alignment module contacts the side of the display screen to form an alignment point.

[0017] Preferably, there are multiple slides on the same side of the detection window, and multiple alignment rods are relatively fixedly connected based on a fixed seat. A slide rail extending along the length of the slide is also provided on the same side of the detection window, wherein the fixed seat is slidably connected to the slide rail, and the alignment motors are arranged one by one based on the side of the detection window, and the power end of each alignment motor is connected to the fixed seat on the corresponding side, so that the alignment rods on the same side move synchronously to align. In short, the detection window has four sides, that is, there are four alignment motors, then during the alignment operation, the four alignment motors align at the same time, thereby quickly realizing the alignment of the display screen based on a gradually shrinking area, and under the rolling support formed by the ball bearings, not only the wear on the back of the display screen is avoided, but also the motion guide formed is more flexible, which is conducive to the alignment of the display screen.

[0018] In some embodiments, the alignment modules are rubber wheels, each rotatably mounted on an alignment end of an alignment rod via a wheel axle. Each wheel rolls along the sidewalls of a chute to achieve alignment. This arrangement not only ensures that the alignment point remains constant despite the rotation of the wheels, but also releases torque during alignment, eliminating the risk of damage to the display screen caused by torque.

[0019] Preferably, the trigger module is fixed to the bottom end of the wheel axle, with the trigger end exposed on the side of the rubber wheel where the snapping point is located. Simply put, the trigger end contacts the lifting module first, and the rubber wheel contacts the display screen later. This prevents wear caused by snapping the display screen against the tabletop before it is raised or lowered. Furthermore, in this application, while the robot is placing the display screen on the tabletop, there are coordinate constraints. However, during the unloading process, the display screen will inevitably shift. Therefore, the alignment amplitude formed by snapping is relatively small, meaning that the display screen cannot contact the rubber wheel first.

[0020] According to another specific implementation and preferred aspect of the present invention, the needle mold mechanism includes a rack installed on the inner side of the alignment window and aligned with the interface of the display screen, and a needle mold installed at the end of each rack, wherein the rack and the alignment module are relatively staggered; the alignment window and the alignment module form a motion avoidance.

[0021] According to another specific embodiment and preferred aspect of the present invention, the alignment power assembly includes two opposing vertically extending frames, a shift frame that slides on each frame, and an alignment power unit that drives the shift frame in vertical motion. The alignment platforms are secured to the shift frames on both sides. Generally, a single synchronizing shaft is used to synchronize the power output from both sides, thereby achieving synchronized lifting and lowering motion of the two shift frames under a single power drive. Conventionally, an endless transmission belt or chain is used to convert the power from the synchronizing shaft end into the power for the shift frame to move up and down.

[0022] According to another specific embodiment and preferred aspect of the present invention, the front image acquisition assembly includes a top camera located directly above the alignment window and side cameras corresponding to and at the same angle as the auxiliary light sources. The incident angle of the auxiliary light sources and the shooting angle of the side cameras are both adjustable. Based on the settings of the top and side cameras, more accurate detection images can be acquired.

[0023] Preferably, the front dust removal system has four auxiliary light sources, each extending along the side of the display screen and positioned around the alignment platform. Each auxiliary light source emits a yellow light beam. Yellow light-based dust removal assists in capturing images of the illuminated display screen surface. Typically, the display screen is square, meaning four auxiliary light sources are used, forming a square. Yellow light is used for dust removal. The basic principle is that when yellow light illuminates the display screen surface, photon energy of a specific wavelength interacts with the electron cloud of dust or the substrate material, weakening the van der Waals or electrostatic attraction between the dust and the surface, making it easier for dust to be removed by subsequent airflow or vibration. For example, yellow light can reduce the adhesion of dust to glass substrates and polarizers, which are prone to dust attraction. Alternatively, in the case of OLED screens, where flexible materials are sensitive to static electricity, yellow light can neutralize the charge and reduce dust attraction. Preferably, the light source is a sodium lamp (589nm) or a yellow LED (customized wavelength 580-600nm). The illumination angle should be tilted 30-60° to enhance the contrast of dust edge shadows.

[0024] Similarly, the back dust removal group has four auxiliary light sources, which extend along the side of the detection window and surround the back of the table panel. The light beams emitted by each auxiliary light source are yellow light, and the irradiation angles of the light beams formed by each auxiliary light source can be adjusted.

[0025] According to another specific embodiment and preferred aspect of the present invention, the static eliminator is mounted on the alignment platform, and the airflow sweeping angle can be adjusted. The yellow light-assisted, combined with the airflow sweeping, improves dust removal efficiency. However, for difficult-to-remove dust layers, only the dust coordinate information generated by the yellow light is fed back, and dust area information is automatically masked when acquiring the inspection image.

[0026] The platform also includes a carrier for supporting the table panel, and the transfer unit includes a shift track that crosses the detection station and a transfer power device, wherein the carrier slides on the shift track and is driven by the transfer power device to move the carrier horizontally in and out of the detection station.

[0027] Another technical solution of the present invention is: a display screen surface inspection process based on low-loss alignment clamping, which adopts the above-mentioned display screen surface inspection equipment based on low-loss alignment clamping and includes the following steps:

[0028] S1. Display screen clamping and alignment

[0029] The display screen is mounted on the inspection window with the front side facing up and the back side facing down. Then, with the center of the inspection window as the reference, the touch module and the lifting module cooperate to lift the display screen upwards. During the lifting and lowering motion, the alignment operation is performed synchronously to clamp the display screen between the supporting surface formed by multiple balls and the alignment point. The center of the display screen is aligned, and the viewing angle formed from the inspection window upwards covers the back appearance inspection surface.

[0030] S2, needle mold alignment

[0031] The carrier is moved horizontally to the inspection station based on the transfer unit, and the alignment window and the inspection window are aligned vertically, the interface on the display screen is aligned vertically with the needle mold, and the alignment platform is lowered to align the needle mold with the interface;

[0032] S3, front and back simultaneous inspection

[0033] Turn on the auxiliary light source, and the front dust removal group forms intersecting light beams at different angles from the alignment window to cover the front detection screen. The back dust removal group forms intersecting light beams at different angles from the detection window to cover the back appearance detection surface. At the same time, turn on the static eliminator, and based on the cooperation of airflow and auxiliary light, form an airflow to blow away the loose dust on the front and back of the display screen, and locate the dust information on the front and back of the display screen based on the auxiliary light. Then turn off the auxiliary light source and static eliminator, and light up the display screen. The front image acquisition component and the back image acquisition component synchronously acquire detection pictures, and at the same time, shield the dust area information when acquiring the detection pictures.

[0034] In step S3, the auxiliary light covers the entire display surface and is preheated for 5-10 seconds to weaken the adhesion of dust. At the same time, the surface static charge is neutralized through electrostatic discharge, and the clean air flow at a pressure of 0.1-0.3MPa is synchronized with the auxiliary light irradiation to blow away the loose dust. The auxiliary light is turned off, the display light source is lit, and the image is captured by a high-speed camera. The dust coordinates recorded in the auxiliary light stage are used to automatically shield the corresponding area in the detection image.

[0035] The static eliminator (ion bar) ionizes the air to generate positive and negative ions, which are then transported to statically charged surfaces via airflow, neutralizing the charge and eliminating static electricity. The airflow nozzles formed by the ion bar are arranged in an array. Based on the distribution of dust located by yellow light, they spray air in a targeted manner while also increasing negative pressure recovery. The dust collection port surrounds the edge of the display to prevent secondary contamination.

[0036] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0037] In the existing display screen inspection process, firstly, the front lighting inspection and the back appearance inspection cannot be performed simultaneously, which not only reduces the inspection efficiency but also increases the probability of accidental scratches on the display screen during the inspection process. Secondly, both the front lighting inspection and the back appearance inspection require alignment adjustment, and during the alignment adjustment process, friction between the display screen and the carrier will definitely be caused. Therefore, the probability of wear is very high, thereby increasing the NG rate (failure rate) of the display screen. Furthermore, both the front lighting inspection and the back appearance inspection require a camera to capture the image. If there is dust on the surface of the display screen, bright spots, dark spots, line defects, etc. will appear during the inspection. At the same time, static electricity on the display screen will interfere, causing the control signal to be disordered, resulting in flickering of the display screen. , image disorder or failure to light up, etc., the present invention cleverly solves the various existing deficiencies through the overall design of the display screen surface inspection equipment based on low-loss alignment clamping. After adopting the display screen surface inspection equipment based on low-loss alignment clamping, first, the display screen is mounted on the inspection window with the front side facing up and the back side facing down, and then the center of the inspection window is used as a reference, and the touch module and the lifting module cooperate to lift the display screen upward, and the alignment operation is performed synchronously during the lifting movement to clamp the display screen between the top support surface and the alignment point formed by multiple ball bearings, thereby completing the center alignment of the display screen, and the viewing angle formed from the inspection window upward covers the back appearance inspection surface; secondly, the carrier is moved horizontally to the inspection station based on the transfer unit, and the alignment window and the inspection window are moved up and down. For alignment, the interface on the display screen is aligned with the needle mold up and down, and the needle mold is aligned and connected to the interface based on the descent of the alignment platform; finally, the auxiliary light source is turned on, and the front dust removal group forms different angles from the alignment window and the intersecting light beams cover the front to light up the detection screen, and the back dust removal group forms different angles from the detection window and the intersecting light beams cover the back appearance detection surface, and the static eliminator is turned on at the same time, based on the cooperation of the airflow and the auxiliary light, an airflow is formed to blow away the loose dust on the front and back of the display screen, and the dust information on the front and back of the display screen is located based on the auxiliary light, then the auxiliary light source and the static eliminator are turned off, the display screen is lit, and the front image acquisition component and the back image acquisition component synchronously acquire the detection picture, and at the same time, the dust area information is shielded when acquiring the detection picture. Therefore, this On the one hand, the invention is based on the lifting of the rolling support formed by the ball and the synchronous retraction and alignment of the sides to achieve low-loss alignment and clamping of the display screen. At the same time, due to spatial layout limitations, based on the display screen being separated from the table panel, the viewing angle formed upward from the detection window covers the back appearance detection surface to meet the one-time clamping and needle mold alignment, synchronous front lighting detection and back appearance detection, which not only improves the efficiency of surface inspection, but also reduces the probability of accidental scratches on the display screen; on the other hand, based on the collaboration of auxiliary light and ion wind, static electricity is removed while neutralizing the surface static charge and blowing away loose dust. The auxiliary light used will mark the coordinates of the dust that is difficult to remove, and the area corresponding to the dust coordinates is automatically shielded in the acquired image to eliminate the negative impact of dust and static electricity on the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the structure of the display screen surface inspection device based on low-loss alignment clamping of the present invention;

[0039] Figure 2 for Figure 1 The main schematic diagram of

[0040] Figure 3 for Figure 2 Schematic diagram of part of the structure;

[0041] Figure 4 for Figure 3 Schematic diagram of the right side;

[0042] Figure 5 for Figure 1 Schematic diagram of the middle part structure;

[0043] Figure 6 for Figure 5 Schematic diagram of part of the structure;

[0044] Figure 7 for Figure 6 Schematic top view of

[0045] Figure 8 for Figure 7 Schematic diagram of the middle platform viewed from above;

[0046] Figure 9 for Figure 7 A magnified schematic diagram of the AA section;

[0047] Figure 10 for Figure 9 The enlarged schematic diagram of point Ⅰ in the middle;

[0048] Figure 11 for Figure 10 Schematic diagram of the middle display screen in the clamping state;

[0049] Figure 12 for Figure 1 A schematic diagram of the structure of the front lighting detection unit;

[0050] Figure 13 for Figure 12 Schematic diagram of the structure of the alignment platform and the needle mold;

[0051] Figure 14 for Figure 13 Schematic top view of

[0052] Wherein: 1. Carrier; 10. Carrier panel; 100. Detection window; 101. Slideway; 11. Lifting module; 110. Support module; 111. Ball bearing; 12. Alignment module; 120. Alignment rod; 121. Alignment module; 122. Alignment actuator; 123. Fixing base; 124. Slideway; 13. Trigger module; 130. Trigger module; c. Trigger terminal; 14. Carrier;

[0053] 2. Transfer unit; 20. Shift rail; 21. Transfer power device;

[0054] 3. Front lighting detection unit; 30. Alignment platform; 300. Alignment window; 31. Needle mold mechanism; 310. Frame; 311. Needle mold; 32. Alignment power assembly; 320. Frame; 321. Shift seat; 322. Alignment power unit; 33. Front image acquisition assembly; 330. Top camera; 331. Side camera;

[0055] 4. Back appearance inspection unit; 40. Back image acquisition component; 400. Base frame; 401. Bottom camera;

[0056] 5. Static eliminator;

[0057] 6. Auxiliary light source; 60. Front dust removal unit; 61. Back dust removal unit;

[0058] X. Display screen. DETAILED DESCRIPTION

[0059] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0062] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0063] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0064] like Figures 1 to 14 As shown, the display screen surface inspection equipment based on low-loss alignment clamping of this embodiment includes a carrier 1, a transfer unit 2, a front lighting detection unit 3 and a back appearance detection unit 4, an electrostatic eliminator 5 based on ion gas to eliminate static electricity on the surface of the display screen X, and multiple auxiliary light sources 6.

[0065] Specifically, the carrier 1 includes a table panel 10 that forms a detection window 100, a lifting module 11 arranged around the detection window 100, an alignment module 12 that takes the center of the detection window 100 as a reference and moves along the sides of the detection window 100, a touch module 13 that is aligned one by one with the alignment points of each alignment module 12, and a carrier 14 for supporting the table panel 10.

[0066] In this example, in the downward projection of the table panel 10, the lifting module 11 is arranged in the area between the edge of the display screen and the edge of the detection window 100. This prevents the lifting module from causing obstruction and interference to the back appearance detection surface; at the same time, the detection window 100 area is S1, the front light detection screen area is S2, and the back appearance detection area is S3, S2>S3>S1. In short, when the display screen X is mounted on the detection window 100, the back of the detection window 100 cannot fully see the required detection. The main reason why the detection window 100 is not enlarged in this application is that there needs to be enough space to arrange the lifting module 11. Each trigger module 13 is synchronized with each alignment point and cooperates with the lifting module 11 to synchronize the display screen X during the lifting process. The lifting surface of the lifting module 11 is composed of multiple balls with flush top surfaces. Based on the lifting of the display screen from the table panel, the viewing angle formed from the detection window upwards covers the back appearance detection surface. The carrier 14 is a commonly used stand, wherein the stand can be adjusted in a horizontal plane (along the length and / or width direction of the display screen), and an escape space is formed inside the stand.

[0067] In some specific embodiments, a plurality of slide grooves 101 extending along the aligning motion direction are provided on the table panel 10 , and each slide groove 101 has a proximal end close to the detection window 100 and a distal end away from the detection window 100 .

[0068] The lifting module 11 includes a supporting module 110 that is positioned proximally of the chute 101 and can slide up and down, and a ball bearing 111 formed on top of the supporting module 110 and flush with the top surface. The chute-based design not only meets the layout requirements of the alignment module, but also allows for the layout of the lifting module and the trigger module. Furthermore, the provision of the ball bearings serves the following technical purposes: a) to generate rolling friction, reducing the damage rate to the back of the display screen; b) to effectively reduce the incidence of side jamming of the display screen due to the free guide formed during the alignment movement; and c) to assist in the alignment adjustment of the display screen within a gradually smaller area as the alignment points converge. The alignment module 12 includes alignment rods 120 extending along the length of the chute 101 and arranged in a one-to-one correspondence; alignment modules 121 located at the ends of each alignment rod 120 and sliding within the chute 101; and an alignment actuator 122 that drives the alignment rods 120 along their length. The alignment modules 121 contact the sides of the display screen X to form alignment points. A notch is formed at the bottom of each supporting module 110. The trigger module 13 includes a trigger module 130 that corresponds one-to-one with each supporting module 110 and slides within a slot. The ends of the trigger modules 130 form a trigger tip c that matches the notch. The trigger tip c cooperates with the notch to drive the display screen X to lift, release, or reset relative to the tabletop 10. Here, a sloped, interfering mechanism is used for lifting and lowering adjustment, allowing for rapid alignment of the display screen from the tabletop.

[0069] In this example, the detection window 100 is square, and each side corresponds to two slide grooves 101. Two alignment rods 120 are relatively fixedly connected based on a fixed seat 123. A slide rail 124 extending along the length of the slide groove 101 is also provided on the same side of the detection window 100, wherein the fixed seat 123 is slidably connected to the slide rail 124. The alignment actuators 122 are arranged one by one based on the side of the detection window 100, and the power end of each alignment actuator 122 is connected to the corresponding side fixed seat 123, so that the alignment rods on the same side move synchronously. In short, the detection window 100 has four sides, that is, there are four alignment actuators 122. Then, during the alignment operation, the four alignment actuators 122 align simultaneously, thereby quickly achieving the alignment of the display screen based on a gradually shrinking area. Moreover, under the rolling support formed by the ball bearings, not only is the wear on the back of the display screen avoided, but the resulting motion guide is more flexible, which is conducive to the alignment of the display screen.

[0070] In some embodiments, the alignment module 121 comprises rubber wheels, each of which is rotatably mounted on the alignment end of the alignment rod 120 via an axle. Each wheel rolls along the sidewalls of the chute 101 to achieve alignment. This arrangement not only ensures that the alignment point remains constant despite the rotation of the wheels, but also releases torque when applied during alignment, eliminating the possibility of damage to the display screen caused by torque during alignment. The touch module 130 is fixed to the bottom end of the axle, with the touch end c exposed from the side where the rubber wheel's alignment point is located. Simply put, the touch end contacts the lifting module first, before the rubber wheel contacts the display screen. This prevents wear caused by the display screen being aligned with the tabletop before being raised or lowered. Furthermore, while the robot arm places the display screen on the tabletop, there are coordinate constraints. However, the display screen will inevitably shift during unloading, resulting in a smaller alignment margin. This means that the display screen will not contact the rubber wheel first.

[0071] The transfer unit 2 includes a shift track 20 that crosses the inspection station and a transfer power device 21, wherein the carrier 14 slides on the shift track 20, and the transfer power device 21 drives the lower carrier 14 to move horizontally in and out of the inspection station (using conventional linear motion methods in this field, such as: telescopic rod, ring belt drive).

[0072] The front lighting detection unit 3 and the back appearance detection unit 4 are aligned up and down and are respectively located at the top and bottom of the detection station, wherein the front lighting detection unit 3 includes an alignment platform 30 forming an alignment window 300, a needle mold mechanism 31, an alignment power assembly 32, and a front image acquisition assembly 33; the needle mold mechanism 31 includes a rack 310 installed on the inner side of the alignment window 300 and aligned with the interface of the display screen X, and a needle mold 311 installed at the end of each rack 310, wherein the rack 310 is relatively staggered with the alignment module 12; the alignment window 300 and the alignment module 12 form a motion avoidance. The alignment power assembly 32 includes a rack 320 located on opposite sides and extending up and down, a shifting seat 321 sliding on the rack 320, and an alignment power device 322 driving the shifting seat 321 to move in the up and down direction, wherein the alignment platform 30 is fixed on the shifting seat 321 from both sides. In general, a synchronization shaft is used to synchronize the power output on both sides. Therefore, under one power drive, the two shift seats can achieve synchronous lifting and lowering movements. Conventionally, an annular transmission belt or a transmission chain is used to convert the power of the synchronization shaft end into the power for the shift seat to move up and down. The front image acquisition component 33 includes a top camera 330 located directly above the alignment window 300, and a side camera 331 that corresponds to the auxiliary light source one by one and has the same angle, wherein the incident angle of the auxiliary light source and the shooting angle of the side camera 331 can be adjusted. Based on the settings of the top camera and the side camera, the detection image can be acquired more accurately.

[0073] The back appearance inspection unit 4 includes a back image acquisition component 40, which includes a base frame 400 located below the inspection station and a bottom camera 401 installed on the base frame 400. The bottom camera 401 can capture the back appearance of the display screen X to be inspected during lifting through the avoidance space inside the carrier 14 and the self-inspection window 100.

[0074] In some specific embodiments, multiple auxiliary light sources 6 include a front dust removal group 60 and a back dust removal group 61. The front dust removal group 60 forms different angles from the alignment window 300 and the intersecting light beams cover the front lighting detection screen. The back dust removal group 61 forms different angles from the detection window 100 and the intersecting light beams cover the back appearance detection surface.

[0075] In this example, the front dust removal assembly 60 includes four auxiliary light sources, each extending along the side of the display screen and positioned around the alignment platform. Each auxiliary light source emits a yellow light beam. Yellow light-based dust removal assists in capturing images of the illuminated display screen surface. Typically, the display screen is square, meaning four auxiliary light sources are used, forming a square. Yellow light is used for dust removal. The basic principle is that when yellow light illuminates the display screen surface, photon energy of a specific wavelength interacts with the electron cloud of dust or the substrate material, weakening the van der Waals or electrostatic attraction between the dust and the surface, making it easier for dust to be removed by subsequent airflow or vibration. For example, yellow light can reduce the adhesion of dust to glass substrates and polarizers, which are prone to dust attraction. Alternatively, in the case of OLED screens, where flexible materials are sensitive to static electricity, yellow light can neutralize charges and reduce dust attraction. Preferably, the light source is a sodium lamp (589nm) or a yellow LED (customized wavelength 580-600nm). The illumination angle should be tilted 30-60° to enhance the contrast of dust edge shadows. Similarly, the back dust removal group 61 has four auxiliary light sources, which extend along the side of the detection window and surround the back of the table panel. The light beams emitted by each auxiliary light source are yellow light, and the irradiation angles of the light beams formed by each auxiliary light source can be adjusted.

[0076] The static eliminator 5 is mounted on the alignment platform 30 and uses airflow and auxiliary light to create an airflow to remove loose dust from the front and back of the display. The airflow sweeping angle can be adjusted. The yellow light-assisted, combined with the airflow sweeping, improves dust removal efficiency. However, for difficult-to-remove dust layers, the yellow light generates dust coordinate information, automatically masking dust area information when capturing the inspection image.

[0077] In summary, the implementation process of this embodiment is as follows:

[0078] S1. Display screen clamping and alignment

[0079] The display screen is mounted on the inspection window with the front side facing up and the back side facing down. Then, with the center of the inspection window as the reference, the touch module and the lifting module cooperate to lift the display screen upwards. During the lifting and lowering motion, the alignment operation is performed synchronously to clamp the display screen between the supporting surface formed by multiple balls and the alignment point. The center of the display screen is aligned, and the viewing angle formed from the inspection window upwards covers the back appearance inspection surface.

[0080] S2, needle mold alignment

[0081] The carrier is moved horizontally to the inspection station based on the transfer unit, and the alignment window and the inspection window are aligned vertically, the interface on the display screen is aligned vertically with the needle mold, and the alignment platform is lowered to align the needle mold with the interface;

[0082] S3, front and back simultaneous inspection

[0083] Turn on the auxiliary light source, and the front dust removal group forms intersecting light beams at different angles from the alignment window to cover the front detection screen. The back dust removal group forms intersecting light beams at different angles from the detection window to cover the back appearance detection surface. At the same time, turn on the static eliminator, and based on the cooperation of airflow and auxiliary light, form an airflow to blow away the loose dust on the front and back of the display screen, and locate the dust information on the front and back of the display screen based on the auxiliary light. Then turn off the auxiliary light source and static eliminator, and light up the display screen. The front image acquisition component and the back image acquisition component synchronously acquire detection pictures, and at the same time, shield the dust area information when acquiring the detection pictures.

[0084] In step S3, the auxiliary light covers the entire display surface and is preheated for 5-10 seconds to weaken the adhesion of dust. At the same time, the surface static charge is neutralized through electrostatic discharge, and the clean air flow at a pressure of 0.1-0.3MPa is synchronized with the auxiliary light irradiation to blow away the loose dust. The auxiliary light is turned off, the display light source is lit, and the image is captured by a high-speed camera. The dust coordinates recorded in the auxiliary light stage are used to automatically shield the corresponding area in the detection image.

[0085] The static eliminator (ion bar) ionizes the air to generate positive and negative ions, which are then transported to statically charged surfaces via airflow, neutralizing the charge and eliminating static electricity. The airflow nozzles formed by the ion bar are arranged in an array. Based on the distribution of dust located by yellow light, they spray air in a targeted manner while also increasing negative pressure recovery. The dust collection port surrounds the edge of the display to prevent secondary contamination.

[0086] In summary, after adopting the display screen inspection equipment based on low-loss alignment clamping, first, the display screen is mounted on the inspection window with the front side facing up and the back side facing down, and then the center of the inspection window is used as a reference, and the touch module and the lifting module cooperate to lift the display screen upward, and the alignment operation is performed synchronously during the lifting movement, so that the display screen is clamped between the top support surface and the alignment point formed by multiple balls, and the center alignment of the display screen is completed, and the viewing angle formed from the inspection window upward covers the back appearance inspection surface; secondly, based on the transfer unit, the carrier is moved horizontally to the inspection station, and the alignment window and the inspection window are aligned up and down, the interface on the display screen is aligned with the needle mold up and down, and based on the descent of the alignment platform, the needle mold is aligned and connected with the interface; finally, the auxiliary light source is turned on, The front dust removal group forms different angles from the self-alignment window and the intersecting light beams cover the front light-up detection screen. The back dust removal group forms different angles from the self-detection window and the intersecting light beams cover the back appearance detection surface. At the same time, the static eliminator is turned on. Based on the cooperation of airflow and auxiliary light, airflow is formed to blow away the loose dust on the front and back of the display screen, and the dust information on the front and back of the display screen is located based on the auxiliary light. Then the auxiliary light source and the static eliminator are turned off, the display screen is illuminated, and the front image acquisition component and the back image acquisition component synchronously acquire detection pictures. At the same time, the dust area information is shielded when acquiring the detection pictures. Therefore, on the one hand, the present invention is based on the lifting of the rolling support formed by the ball and the synchronous retraction and alignment of the sides to achieve low-loss alignment clamping of the display screen. At the same time, due to Due to the limitation of spatial layout, the display screen is separated from the table panel, and the viewing angle formed by the inspection window upwards covers the back appearance inspection surface, so as to meet the requirements of one-time clamping and needle mold alignment, and synchronize the front lighting inspection and back appearance inspection, which not only improves the efficiency of surface inspection, but also reduces the probability of accidental scratches on the display screen; on the other hand, based on the cooperation of auxiliary light and ion wind, static electricity is removed while the loose dust is blown away based on the neutralization of surface static charge, and the auxiliary light used will mark the coordinates of the dust that is difficult to remove, and the corresponding area of ​​the dust coordinates is automatically shielded in the acquired image to eliminate the negative impact of dust and static electricity on the inspection results; thirdly, in the downward orthographic projection of the table panel, the lifting module is arranged in the area between the edge of the display screen and the edge of the inspection window, To avoid the obstruction interference of the back appearance inspection surface caused by the lifting module, the area of ​​the inspection window 100 is S1, the front light-up inspection screen area is S2, and the back appearance inspection area is S3, S2>S3>S1. In short, when the display screen X is mounted on the inspection window 100, the back of the inspection window 100 cannot see the full range of the required inspection. The main reason why the inspection window 100 is not enlarged in this application is that there needs to be enough space to layout the lifting module 11; the fourth aspect is based on the design of the slide groove, which not only meets the layout requirements of the alignment module, but also can be used for the layout of the lifting module and the touch module. Moreover, the setting of the ball has the following technical purposes: a) forming rolling friction to reduce the damage rate of the back of the display screen;b) During the alignment movement, the free guide formed can effectively reduce the incidence of side jamming of the display screen; c) As the alignment points converge, the auxiliary display screen is adjusted in position in a gradually smaller area; the fifth aspect is based on the cooperation between the touch end and the notch to drive the lifting, separation or reset unloading of the display screen relative to the table panel. Here, the lifting and lowering adjustment is carried out by the slope matching and resistance method to quickly achieve the alignment adjustment of the display screen from the table panel; the sixth aspect is based on the method of gradually shrinking the area to quickly achieve the alignment of the display screen, and under the rolling support formed by the ball, not only the wear on the back of the display screen is avoided, but also the movement guide formed is more flexible, which is conducive to the alignment of the display screen; based on the setting of the rubber wheel, not only the alignment position formed by the rotation of the rubber wheel can be changed while the alignment point remains unchanged; and when subjected to torque during alignment, the release is formed based on the rotation of the rubber wheel, eliminating the display screen caused by the torque during alignment. The probability of screen damage; at the same time, the touch end contacts the lifting module first, and the rubber wheel contacts the display screen later, to avoid wear and tear caused by the display screen not being raised or lowered but being aligned with the table panel. In addition, this application has coordinate restrictions when the manipulator places the display screen on the table panel, but it is inevitable that the display screen will be offset during the unloading process, so the alignment formed by the alignment is small, that is, it is impossible for the display screen to touch the rubber wheel first; the seventh aspect is that the front dust removal group has four auxiliary light sources, and they are respectively extended along the side of the display screen and arranged on the alignment platform, and the light beams emitted by each auxiliary light source are yellow light. Yellow light dust removal is used to assist in obtaining the surface image after the display screen is lit. Typically, the display screen is square, meaning four auxiliary light sources are used, forming a square. Yellow light is used to assist in dust removal. The basic principle is that when yellow light illuminates the display screen surface, photon energy of a specific wavelength interacts with the electron cloud of dust or the substrate material, weakening the van der Waals or electrostatic attraction between the dust and the surface, making the dust more easily removed by subsequent airflow or vibration. For example, glass substrates and polarizers are prone to dust adsorption, and yellow light can reduce their adhesion strength. Alternatively, in the case of OLED screens, where flexible materials are sensitive to static electricity, yellow light neutralizes the charge and reduces dust adsorption. Preferably, the light source is a sodium lamp (589nm) or yellow LED light (customized wavelength 580-600nm), with an illumination angle of 30°-60° to enhance the contrast of dust edge shadows. Similarly, the back dust removal group has four auxiliary light sources, extending along the side of the detection window and surrounding the back of the table panel. The beams emitted by each auxiliary light source are yellow, and the illumination angle of each auxiliary light source can be adjusted. The static eliminator is mounted on the alignment platform, and the airflow sweeping angle can be adjusted. With the aid of yellow light and combined with airflow, the dust removal rate is improved. However, the dust layer that is difficult to remove can only be fed back based on the dust coordinate information formed by the yellow light, and the dust area information is automatically shielded when acquiring the detection image.Eighth, auxiliary light covers the entire display surface, preheating for 5-10 seconds to weaken dust adhesion and neutralizing surface static charge through electrostatic discharge. A clean airflow at a pressure of 0.1-0.3MPa is synchronized with auxiliary light illumination to blow away loose dust. The auxiliary light is then turned off, and the display illuminates. A high-speed camera captures the image, and the corresponding dust coordinates recorded during the auxiliary light phase are automatically masked in the detection image. The static eliminator (ion rod) ionizes the air to generate positive and negative ions, which are then delivered to the surface of the statically charged object using airflow to neutralize the charge and eliminate static electricity. The airflow nozzles formed by the ion rod are arranged in an array, directional according to the dust distribution located by the yellow light, while also increasing negative pressure recovery. The dust suction port surrounds the edge of the display to prevent secondary contamination.

[0087] This embodiment is intended only to illustrate the technical concepts and features of the present invention. Its purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. It is not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the spirit and essence of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A display screen inspection device based on low-loss alignment clamping, comprising a carrier, a transfer unit, a front lighting inspection unit, and a back appearance inspection unit, characterized in that: The carrier includes a table panel forming a detection window, a lifting module arranged around the detection window, an alignment module that moves along the sides of the detection window with the center of the detection window as a reference, and a touch module that is aligned one by one with the alignment points of each alignment module, wherein the detection window area is S1, the front light-up detection screen display area is S2, and the back appearance detection area is S3, where S2>S3>S1; each touch module is synchronized with each alignment point and cooperates with the lifting module to ensure that the display screen is synchronously aligned during lifting; the top support surface of the lifting module is composed of multiple ball bearings with flush top surfaces, and based on the display screen being lifted off the table panel, the viewing angle formed from the detection window upwards covers the back appearance detection surface; The front lighting detection unit and the back appearance detection unit are aligned up and down and are respectively located at the top and bottom of the detection station. The front lighting detection unit includes an alignment platform forming an alignment window, a needle mold mechanism, an alignment power component, and a front image acquisition component; the back appearance detection unit includes a back image acquisition component, and the display screen surface inspection equipment also includes an electrostatic eliminator based on ion gas to eliminate static electricity on the surface of the display screen, and multiple auxiliary light sources, wherein the multiple auxiliary light sources include a front dust removal group and a back dust removal group. The front dust removal group forms different angles from the alignment window and the intersecting light beams cover the front lighting detection screen. The back dust removal group forms different angles from the detection window and the intersecting light beams cover the back appearance detection surface. Based on the cooperation of the airflow and the auxiliary light, an airflow is formed to blow away the loose dust on the front and back of the display screen. The dust information on the front and back of the display screen is located based on the auxiliary light, and the front image acquisition component and the back image acquisition component synchronously obtain the automatic shielding dust area information in the image.

2. The display screen inspection device based on low-loss alignment clamping according to claim 1 is characterized in that: In the downward orthographic projection of the table panel, the lifting module is arranged in the area between the edge of the display screen and the edge of the detection window.

3. The display screen inspection device based on low-loss alignment clamping according to claim 1 is characterized in that: A plurality of slide grooves extending along the direction of the aligning movement are provided on the table panel, and each slide groove has a proximal end close to the detection window and a distal end away from the detection window. The lifting module includes a supporting module based on the proximal layout of the slide groove and capable of sliding up and down, and a ball formed on the top of the supporting module and flush with the top surface.

4. The display screen inspection device based on low-loss alignment clamping according to claim 3 is characterized in that: A notch is formed at the bottom of each top support module, and the touch module includes a touch module that corresponds one-to-one to the top support module and slides in the slide groove, wherein the end of the touch module forms a touch end that matches the notch. Based on the cooperation between the touch end and the notch, the display screen is driven to be lifted, disengaged, or reset and unloaded relative to the table panel.

5. The display screen inspection device based on low-loss alignment clamping according to claim 4 is characterized in that: The alignment module includes alignment rods extending along the length of the slide groove and arranged one by one, an alignment module located at the end of each alignment rod and sliding in the slide groove, and an alignment power device that drives the alignment rod to move along its own length direction, wherein the alignment module contacts the side of the display screen to form an alignment point.

6. The display screen inspection device based on low-loss alignment clamping according to claim 5 is characterized in that: There are multiple slide grooves located on the same side of the detection window, and multiple alignment rods are relatively fixedly connected based on the fixed seat. A slide rail extending along the length of the slide groove is also provided on the same side of the detection window, wherein the fixed seat is slidably connected to the slide rail, and the alignment motors are arranged one by one based on the side of the detection window, and the power end of each alignment motor is connected to the fixed seat on the corresponding side, so that the alignment rods on the same side can move synchronously and align.

7. The display screen inspection device based on low-loss alignment clamping according to claim 5 or 6, characterized in that: The alignment modules are rubber wheels, wherein each rubber wheel is freely rotatably mounted on the alignment end of the alignment rod through a wheel axle, and each rubber wheel rolls based on the side wall of the slide groove to form alignment.

8. The display screen inspection device based on low-loss alignment clamping according to claim 7 is characterized in that: The touch module is fixed to the bottom end of the wheel shaft, and the touch end is exposed from the side where the aligning point formed by the rubber wheel is located.

9. The display screen inspection device based on low-loss alignment clamping according to claim 1, characterized in that: The needle mold mechanism includes a rack installed inside the alignment window and aligned with the interface of the display screen, and a needle mold installed at the end of each rack, wherein the rack and the alignment module are relatively staggered; the alignment window and the alignment module form a motion avoidance.

10. The display screen inspection device based on low-loss alignment clamping according to claim 1, characterized in that: The alignment power assembly includes two frames located on opposite sides and extending up and down, shifting frames sliding on the frames respectively, and an alignment power device driving the shifting frames to move in the up and down directions, wherein the alignment platforms are fixed on the shifting frames from both sides respectively.

11. The display screen inspection device based on low-loss alignment clamping according to claim 1, characterized in that: The front image acquisition component includes a top camera located directly above the alignment window and a side camera that corresponds one-to-one to the auxiliary light source and has the same angle as the auxiliary light source, wherein the incident angle of the auxiliary light source and the shooting angle of the side camera can both be adjusted and set.

12. The display screen inspection device based on low-loss alignment clamping according to claim 11, characterized in that: The front dust removal group has four auxiliary light sources, which are respectively extended along the side of the display screen and arranged around the alignment platform, wherein the light beam emitted by each auxiliary light source is yellow light.

13. The display screen inspection device based on low-loss alignment clamping according to claim 1, characterized in that: The back dust removal group has four auxiliary light sources, which are extended along the side of the detection window and surrounded by the back of the table panel. The light beams emitted by each auxiliary light source are yellow light, and the irradiation angles of the light beams formed by each auxiliary light source can be adjusted.

14. The display screen inspection device based on low-loss alignment clamping according to claim 1, characterized in that: The static eliminator is installed on the alignment platform, and the air flow sweeping angle can be adjusted.

15. The display screen inspection device based on low-loss alignment clamping according to claim 1, characterized in that: The platform also includes a carrier for supporting the platform panel, and the transfer unit includes a shift track and a transfer power device that crosses the detection station, wherein the carrier slides on the shift track and is driven by the transfer power device to move the carrier horizontally in and out of the detection station.

16. A display screen inspection process based on low-loss alignment clamping, characterized in that: It adopts the display screen surface inspection device based on low-loss alignment clamping according to any one of claims 1 to 15, and includes the following steps: S1. Display screen clamping and alignment The display screen is mounted on the inspection window with the front side facing up and the back side facing down. Then, with the center of the inspection window as the reference, the touch module and the lifting module cooperate to lift the display screen upwards. During the lifting and lowering motion, the alignment operation is performed synchronously to clamp the display screen between the supporting surface formed by multiple balls and the alignment point. The center of the display screen is aligned, and the viewing angle formed from the inspection window upwards covers the back appearance inspection surface. S2, needle mold alignment The carrier is moved horizontally to the inspection station based on the transfer unit, and the alignment window and the inspection window are aligned vertically, the interface on the display screen is aligned vertically with the needle mold, and the alignment platform is lowered to align the needle mold with the interface; S3, front and back simultaneous inspection Turn on the auxiliary light source, and the front dust removal group forms intersecting light beams at different angles from the alignment window to cover the front detection screen. The back dust removal group forms intersecting light beams at different angles from the detection window to cover the back appearance detection surface. At the same time, turn on the static eliminator, and based on the cooperation of airflow and auxiliary light, form an airflow to blow away the loose dust on the front and back of the display screen, and locate the dust information on the front and back of the display screen based on the auxiliary light. Then turn off the auxiliary light source and static eliminator, and light up the display screen. The front image acquisition component and the back image acquisition component synchronously acquire detection pictures, and at the same time, shield the dust area information when acquiring the detection pictures.

Images