Black Mura detection device

Abstract

This invention belongs to the field of display panel testing technology, specifically relating to the Black Mura testing equipment. It comprises two testing stations located at two points on a rotating disk, used to support the screen to be tested; a camera module, horizontally positioned above the rotating disk, for acquiring image data from the screen; an automatic door module located in front of the camera module, used to close the testing space after the screen rotates to the corresponding testing space; and a probe module including a lit PCB section and two probe docking assemblies distributed on the rotating disk. The lit PCB section is fixed to one side of the camera module, and multiple probes connected to it are located above the rotating disk. The two probe docking assemblies are located at two points on the rotating disk, each corresponding to one side of a testing station, and are used to fix the PCB. When the probe docking assemblies rotate to a position below the lit PCB section, the probes illuminate the PCB. This solution improves testing efficiency and shortens testing time.

Description

Technical Field

[0001] This utility model belongs to the field of display panel testing technology, specifically relating to the Black Mura testing equipment. Background Technology

[0002] For LCD display panels, various imperfections exist during the manufacturing process, resulting in various types of mura defects. Among the various types of mura, black mura is the most obvious. Black mura refers to brightness and color differences that should not appear on a black LCD display.

[0003] The main functions of automated optical inspection of display modules are divided into appearance inspection and image inspection. Appearance inspection is used to determine whether there are defects such as foreign objects, scratches, color differences, and ink defects on the surface of the display module. Image inspection is used to determine whether there are defects such as bright spots, black spots, bubbles, and uneven brightness (mura) in the image of the display module after it is lit. Generally, traditional inspection methods require multiple technicians to operate multiple devices, resulting in low inspection efficiency, high inspection costs, and long inspection times.

[0004] The prior art CN111693530A describes a testing device and method for testing display modules. The testing device includes: a testing station for carrying the display module; a machine base with a testing channel for the testing station to operate in, the testing channel having an appearance testing station and an image testing station; a first testing mechanism disposed on the machine base, the first testing mechanism being used to perform appearance testing on the display module at the appearance testing station; and a second testing mechanism disposed on the machine base, the second testing mechanism being used to perform image testing on the image displayed by the display module at the image testing station.

[0005] This invention provides a new Black Mura detection device. Utility Model Content

[0006] The problem to be solved by this utility model is: to improve detection efficiency, reduce detection time, and improve the degree of automation of detection.

[0007] The Black Mura inspection equipment includes a machine base; a rotating disk rotatably mounted on the machine base; two inspection stations located at two points on the rotating disk to support the screen to be inspected; a camera module spanning across the rotating disk to acquire image data from the screen to be inspected; an automatic door module spanning across the rotating disk and located in front of the camera module, which closes the inspection space after the screen to be inspected rotates into the inspection space corresponding to the camera module; and a probe module including a lit PCB section and two probe docking assemblies distributed on the rotating disk. The lit PCB section is fixed to one side of the camera module, and multiple probes connected to it are located above the rotating disk. The two probe docking assemblies are located at two points on the rotating disk, corresponding to one side of each inspection station, and are used to fix the PCB. When the probe docking assemblies rotate to a position below the lit PCB section, the probes illuminate the PCB.

[0008] An automatic door module includes a door frame, a door panel, and a second cylinder. The door frame is horizontally mounted above a rotating disk along the X-axis. The door frame has a crossbeam and a vertical post. The bottom of the vertical post of the door frame is mounted on the machine base on both sides of the rotating disk. There are two second cylinders on one side of the crossbeam of the door frame via a second cylinder fixing plate. The bottom ends of the piston rods of the two second cylinders are connected to second cylinder connecting plates, and the second cylinder connecting plates are connected to a horizontal fixing rod mounted on the door panel.

[0009] In this technical solution, when the piston rod of the second cylinder moves up and down, it drives the door panel to move up and down, thereby opening or closing the detection space.

[0010] Furthermore, in the automatic door module, an ion air bar is installed on the other side of the crossbeam of the door frame via an ion air bar fixing plate.

[0011] Furthermore, sealing plates are installed on both sides of the door panel.

[0012] In this technical solution, sealing plates are added to both sides, which increases the width of the door.

[0013] Furthermore, a sealing strip is installed at the bottom of the door panel.

[0014] In this technical solution, the sealing strip can ensure that gaps are isolated after the door panel is lowered.

[0015] Furthermore, the camera module includes a camera mount, the bottom end of the upright of the camera mount is connected to the machine base, and a camera is slidably connected to the crossbeam of the camera mount via a sliding mechanism.

[0016] Furthermore, the sliding mechanism includes a slide rail frame connected to the crossbeam of the camera mount, a lead screw installed inside the slide rail frame, a slider connected to the lead screw, and a camera slider plate connected to the slider. A lead screw motor is connected to the bottom end of the lead screw. The slider is slidably connected to the outside of the slide rail integrally formed on the front side of the slide rail frame. The camera slider plate is connected to the camera, and the slider drives the camera slider plate to move up and down, thereby driving the camera to move up and down.

[0017] Furthermore, an angle adjustment component one is connected below the camera slider plate, and an angle adjustment component two is connected below the angle adjustment component one. The angle adjustment component two is connected to the camera via the camera connection plate.

[0018] Furthermore, the camera used is an LMK camera.

[0019] Furthermore, the PCB lighting section includes a lighting bracket set on one side of the camera and fixed on the machine base, and a probe holder fixing block that is movably connected to the lighting bracket via a first cylinder drive mechanism. Multiple probes are installed in the middle of the probe holder fixing block.

[0020] Furthermore, the first cylinder drive mechanism includes a first cylinder fixing plate connected to the lighting bracket, a first cylinder fixed on the first cylinder fixing plate, a first cylinder connecting plate connected to the bottom of the first cylinder, and a fixing block connecting plate connected below the first cylinder connecting plate, with the fixing block connecting plate connected to the probe seat fixing block.

[0021] Furthermore, the probe docking assembly includes a docking assembly mounting base disposed on a rotating disk; a PCB fixing plate mounting base slidably connected to the docking assembly mounting base; a PCB fixing block disposed on a horizontal plate of the PCB fixing plate mounting base; and a top of the PCB fixing block for fixing the PCB.

[0022] Furthermore, the PCB lighting section also includes guide posts on both sides of the bottom of the probe holder fixing block; openings are provided at both ends of the top of the PCB fixing block; the openings provide guidance for the guide posts of the PCB lighting section and provide the correct direction for the probe to descend.

[0023] Furthermore, the vertical plate of the PCB fixing plate mount passes through the rotating disk; the bottom of the PCB fixing block is provided with three guide posts, and the rotating disk corresponding to the guide posts of the probe docking assembly is also provided with openings, and springs are installed on the guide posts of the probe docking assembly.

[0024] In this technical solution, when the probe docking assembly is subjected to pressure, the vertical plate of the fixed plate mounting base moves downward, the spring is compressed, and three guide posts at the bottom of the PCB fixing block enter the corresponding openings on the rotating disk. Assembly errors are eliminated through spring floating.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention features a rotating disk with two independent inspection stations, each carrying a screen to be inspected. The rotation of the disk alternately feeds the two stations into the inspection space, enabling continuous inspection. The dual-station design allows loading and unloading operations at one station while inspecting another, reducing equipment idle time. The illuminated PCB is fixed to one side of the camera module, with the probe suspended above the rotating disk, directly contacting the probe docking assembly below. When the probe docking assembly rotates with the disk to below the illuminated PCB, it automatically completes the circuit connection, illuminating the screen; saving monitoring time. This solution, through a dual-station rotating disk and automatic docking, improves inspection efficiency and shortens inspection time. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the external structure of the Black Mura detection device of this utility model;

[0028] Figure 2 This is a schematic diagram of the internal structure of the Black Mura detection device of this utility model when it is located in the first direction;

[0029] Figure 3 This is a schematic diagram of the internal structure of the Black Mura detection device of this utility model when it is located in the second direction;

[0030] Figure 4 For the present utility model Figure 1 Top view;

[0031] Figure 5 This is a schematic diagram of the detection station on the rotating disk of this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the automatic door module of this utility model;

[0033] Figure 7 This is a schematic diagram of the camera module of this utility model;

[0034] Figure 7a This is a partial schematic diagram of the camera and its sliding mechanism according to the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the PCB section for lighting up according to this utility model;

[0036] Figure 9 This is a schematic diagram of the distribution structure of the probe docking assembly on the rotating disk of this utility model;

[0037] Figure 10 This is a schematic diagram of the probe docking assembly of this utility model.

[0038] Figure label:

[0039] 110 on the rack;

[0040] 210 Camera module; 211 Camera mount; 212 Camera; 213 Camera mounting plate; 214 Slide rail frame mounting plate; 215 Slide rail frame; 216 Lead screw; 217 Slider; 218 Camera slider plate; 219 Lead screw motor; 220 Electric displacement stage; 221 Slide rail; 222 Camera connecting plate;

[0041] 310 Probe module; 311 Illumination PCB section; 312 Guide post; 313 Illumination bracket; 314 First cylinder fixing plate; 315 First cylinder; 316 First cylinder connecting plate; 317 Fixing block connecting plate; 318 Probe seat fixing block; 319 Probe;

[0042] 320 Probe docking assembly; 321 Dating assembly mounting base; 322 PCB mounting plate mounting base; 323 PCB fixing block; 325 Spring;

[0043] 410 Automatic door module; 411 Door frame; 412 Door panel; 413 Sealing strip; 414 Sealing plate; 415 Ionizing air bar fixing plate; 416 Ionizing air bar; 417 Second cylinder fixing plate; 418 Second cylinder; 419 Second cylinder connecting plate; 420 Horizontal fixing rod;

[0044] 510 Inspection station; 511 First master plate; 512 Second master plate; 513 Angle master plate; 514 Micrometer head;

[0045] 610 rotating disk;

[0046] 710 Lower frame; 711 Machine base; 712 Gear motor;

[0047] 810 Screen to be tested. Detailed Implementation

[0048] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] Combination Figures 1-5 As shown, the Black Mura inspection equipment provided by this utility model includes an upper frame 110, a lower frame 710, a camera module 210, a probe module 310, an automatic door module 410, an inspection station 510, and a rotary table 610.

[0051] A rotating disk 610 is installed on the machine base 711 of the lower frame 710. A geared motor 712 is connected to the bottom center of the rotating disk 610, and the geared motor 712 drives the rotating disk 610 to rotate.

[0052] like Figure 5 As shown, the rotary disk 610 is equipped with two inspection stations 510. The rotary disk 610 drives the inspection stations 510 to rotate.

[0053] Inspection station 510 is used to hold the screen 810 to be inspected.

[0054] The inspection station 510 includes a first master plate 511, a second master plate 512, and an angle master plate 513. The first master plate 511 is mounted on the rotary disk 610, and the second master plate 512 is mounted on the first master plate 511, rotatably connected to it. The angle master plate 513 is mounted on the second master plate 512. The first master plate 511 can be finely adjusted along the X and Y axes using a micrometer 514, and the second master plate 512 can be finely adjusted along the Y axis using the micrometer 514. Rotating the second master plate 512 causes the angle master plate 513 to be finely adjusted. This allows for fine-tuning and angle adjustment of the screen 810 to be inspected.

[0055] Combination Figures 1-4 , Figure 6 As shown, the automatic door module 410 is positioned across the rotating disk 610 and in front of the camera module 210. The automatic door module 410 acts as a protective door for the equipment, controlling the opening and closing of the detection space. When the screen to be detected 810 rotates into the detection space, the automatic door module 410 moves down, closing the detection space.

[0056] like Figure 6 As shown, the automatic door module 410 includes a door frame 411, a door panel 412, a second cylinder 418, and a sealing plate 414. Specifically, the door frame 411 is horizontally positioned above the rotating disk 610 along the X-axis. The door panel 412 is movably connected to the door frame 411.

[0057] The gantry 411 has a crossbeam and uprights. The bottom of the uprights of the gantry 411 is mounted on the machine base 711 on both sides of the rotating disk 610. On one side of the crossbeam of the gantry 411, an ion bar 416 is installed via an ion bar fixing plate 415, and on the other side, two second cylinders 418 are installed via a second cylinder fixing plate 415. The bottom ends of the piston rods of the two second cylinders 418 are connected to second cylinder connecting plates 419, which are connected to a horizontal fixing rod 420 mounted on the door plate 412. When the piston rods of the second cylinders 418 move up and down, they drive the door plate 412 to move up and down, thereby opening or closing the detection space.

[0058] Sealing plates 414 are provided on both sides of the door panel 412, which increases the door width. A sealing strip 413 is provided at the bottom of the door panel 412 to ensure that gaps are isolated after the door panel 412 is lowered. Through the combined action of the upper frame 110, lower frame 710, door panel 412, sealing plates 414, and sealing strip 413, the detection space is ensured to be sealed after the door panel 412 is lowered.

[0059] Combination Figures 1-4 , Figure 7 , Figure 7a As shown, the camera module 210 is positioned horizontally behind the automatic door module 410 and is used to acquire image data of the screen 810 to be inspected. When the rotating disk 610 rotates the screen 810 to be inspected into the field of view of the camera module 210, the camera module 210 acquires image data of the screen 810 to be inspected.

[0060] The camera module 210 includes a camera mount 211 and a camera 212 that is slidably connected to the camera mount 211. Specifically,

[0061] The bottom end of the upright of the camera mount 211 is connected to the machine base 711. A camera mounting plate 213 is connected to the crossbeam of the camera mount 211. A slide rail frame fixing plate 214 is connected to the camera mounting plate 213. A sliding mechanism is connected to the slide rail frame fixing plate 214. A camera 212 is connected to the sliding mechanism.

[0062] The sliding mechanism includes a slide rail frame 215 connected to a slide rail frame fixing plate 214, a lead screw 216 disposed inside the slide rail frame 215, a slider 217 connected to the lead screw 216, and a camera slider plate 218 connected to the slider 217. A lead screw motor 219 is connected to the bottom end of the lead screw 216. The slider 217 is fitted onto the outer side of the slide rail 221 integrally formed on the front side of the slide rail frame 215. The slider 217 moves up and down, driving the camera slider plate 218 to move.

[0063] An electric displacement stage 220 is connected to the lower part of the horizontal plate of the camera slider plate 218. The electric displacement stage 220 is connected to the camera 212 through the camera connection plate 222.

[0064] Camera 212 uses an LMK camera. Camera 212 can perform detection at heights from 300mm to 700mm. It can be adjusted 5 degrees forward, backward, left, and right using an electric displacement stage 220.

[0065] Combination Figures 1-4 , Figure 8 , Figure 9 As shown, the probe module 310 is used to contact the PCB, transmit electrical signals to illuminate the PCB, and provide power and control signals to the screen under test. The probe module 310 includes a PCB-illuminating section 311 and two probe docking assemblies 320 distributed at two corners of the rotating disk 610. The bottom of the PCB-illuminating section 311 is used to fix probes 319, and the top of the probe docking assemblies 320 is used to fix the PCB. When the probe docking assemblies 320 are rotated by the rotating disk 610 to a position directly below the PCB-illuminating section 311, the probes of the PCB-illuminating section 311 contact the PCB of the probe docking assemblies 320, illuminating the PCB.

[0066] like Figure 8 As shown, the illuminated PCB section 311 is located on the right side of the camera module 210. The illuminated PCB section 311 includes an illuminated bracket 313 located on one side of the camera, a first cylinder fixing plate 314 connected to the illuminated bracket 313, a first cylinder 315 fixed on the first cylinder fixing plate 314, a first cylinder connecting plate 316 connected to the bottom of the first cylinder 315, a fixing block connecting plate 317 connected below the first cylinder connecting plate 316, a probe holder fixing block 318 connected to the side of the fixing block connecting plate 317, and guide posts 312 arranged on both sides of the bottom of the probe holder fixing block 318. Multiple probes 319 are installed in the middle of the probe holder fixing block 318. The movement of the first cylinder 315 drives the probes 319 to move up and down.

[0067] like Figure 9 As shown, the two probe docking components 320 are respectively set on one side of a detection station 510.

[0068] Combination Figures 1-4 , Figure 9 , Figure 10 As shown, the probe docking assembly 320 includes a docking assembly mounting base 321 disposed on the rotating disk 610, a PCB fixing plate mounting base 322, and a PCB fixing block 323 disposed on the horizontal plate of the PCB fixing plate mounting base 322; the vertical plate of the PCB fixing plate mounting base 322 penetrates the rotating disk 610. The top of the PCB fixing block 323 is used to fix the PCB, and openings are provided at both ends of the top of the PCB fixing block 323 to provide a guiding direction for the guide post 312 that illuminates the PCB part 311 and to provide the correct direction for the probe 319 to descend.

[0069] The bottom of the PCB fixing block 323 is provided with three guide posts 312. The rotating disk 610 corresponding to the guide posts 312 of the probe docking assembly 320 is also provided with openings. Springs 325 are installed on the guide posts 312 of the probe docking assembly 320, so that the probe docking assembly 320 can float when pressure is applied, eliminating assembly errors. The probe 319 that illuminates the PCB section 311 moves downward, and the probe 319 illuminates the PCB of the probe docking assembly 320.

[0070] How Black Mura testing equipment works:

[0071] Place the screen 810 to be tested in a testing station 510 and adjust the position of the testing station 510;

[0072] Rotating disk 610 rotates, inspection station 510 rotates, and when the screen to be inspected 810 rotates to the inspection space corresponding to the camera, door panel 412 closes.

[0073] The camera 212 is repositioned to ensure that the screen 810 to be tested is within the field of view of the camera 212;

[0074] The control probe 319 contacts the PCB and transmits an electrical signal to illuminate the PCB.

[0075] Camera 212 performs visual inspection, captures images of the screen 810 to be inspected, and detects hidden or specific angles of BlackMura.

[0076] After the test is completed, the door panel 412 opens, the rotary table 610 rotates, the current test station 510 leaves the test space, the screen that has completed the test is taken out, and a new screen to be tested is placed in.

[0077] Meanwhile, another testing station 510 carries the screen to be tested and rotates it into the testing space for testing.

[0078] By using two inspection stations on the rotary table 610 to work alternately, continuous BlackMura inspection of the screen to be inspected is achieved.

[0079] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0080] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A Black Mura testing apparatus, comprising a machine base (711); characterized in that, The Black Mura inspection equipment also includes a rotating disk (610), which is rotatably mounted on a machine base (711); two inspection stations (510), located at two points on the rotating disk (610), for carrying the screen to be inspected (810); a camera module (210), horizontally mounted above the rotating disk (610), for acquiring image data of the screen to be inspected (810); and an automatic door module (410), horizontally mounted above the rotating disk (610) and located in front of the camera module (210), which closes the screen to be inspected (810) after it rotates into the inspection space corresponding to the camera module (210). The detection space includes a probe module (310), comprising a lit PCB section (311) and two probe docking components (320) distributed on a rotating disk (610). The lit PCB section (311) is fixed to one side of the camera module (210), and the multiple probes connected to it are located above the rotating disk (610). The two probe docking components (320) are set at two locations on the rotating disk (610) and are respectively set on one side of a detection station (510). The probe docking components (320) are used to fix the PCB. When the probe docking components (320) rotate to below the lit PCB section (311), the probes light up the PCB.

2. The Black Mura detection device according to claim 1, characterized in that, The automatic door module (410) includes a door frame (411), a door panel (412), and a second cylinder (418). The door frame (411) is horizontally mounted above the rotating disk (610) along the X-axis. The door frame (411) has a crossbeam and a vertical rod. The bottom of the vertical rod of the door frame (411) is mounted on the machine base (711) on both sides of the rotating disk (610). There are two second cylinders (418) on one side of the crossbeam of the door frame (411) via a second cylinder fixing plate (415). The bottom end of the piston rod of the two second cylinders (418) is connected to a second cylinder connecting plate (419), and the second cylinder connecting plate (419) is connected to a horizontal fixing rod (420) mounted on the door panel (412).

3. The Black Mura detection device according to claim 2, characterized in that, The door panel (412) is provided with sealing plates (414) on both sides.

4. The Black Mura detection device according to claim 3, characterized in that, A sealing strip (413) is provided at the bottom of the door panel (412).

5. The Black Mura detection device according to claim 1, characterized in that, The camera module (210) includes a camera mount (211). The bottom end of the upright of the camera mount (211) is connected to the machine base (711). A camera (212) is slidably connected to the crossbeam of the camera mount (211) via a sliding mechanism.

6. The Black Mura detection device according to claim 5, characterized in that, The sliding mechanism includes a slide rail frame (215) connected to the crossbeam of the camera mount (211), a lead screw (216) set inside the slide rail frame (215), a slider (217) connected to the lead screw (216), and a camera slider plate (218) connected to the slider (217). A lead screw motor (219) is connected to the bottom end of the lead screw (216). The slider (217) is slidably connected to the outside of the slide rail integrally set on the front side of the slide rail frame (215). The camera slider plate (218) is connected to the camera. The slider (217) drives the camera slider plate (218) to move up and down, thereby driving the camera to move up and down.

7. The Black Mura detection device according to claim 6, characterized in that, The camera (212) is an LMK camera.

8. The Black Mura detection device according to any one of claims 1-7, characterized in that, The PCB lighting section (311) includes a lighting bracket (313) disposed on one side of the camera and fixed on the machine base (711); a probe holder fixing block (318) that is movably connected to the lighting bracket (313) via a first cylinder drive mechanism; and a plurality of probes (319) installed in the middle of the probe holder fixing block (318).

9. The Black Mura detection device according to claim 8, characterized in that, The probe docking assembly (320) includes a docking assembly mounting base (321) disposed on a rotating disk (610); a PCB fixing plate mounting base (322) slidably connected to the docking assembly mounting base (321); a PCB fixing block (323) disposed on a horizontal plate of the PCB fixing plate mounting base (322); the top of the PCB fixing block (323) is used to fix the PCB; the illuminated PCB part (311) also includes guide posts (312) disposed on both sides of the bottom of the probe base fixing block (318); the top of the PCB fixing block (323) is provided with openings at both ends; the openings provide a guiding direction for the guide posts (312) of the illuminated PCB part (311).

10. The Black Mura detection device according to claim 9, characterized in that, The vertical plate of the PCB fixing plate mounting base (322) passes through the rotating disk (610); the bottom of the PCB fixing block (323) is provided with three guide posts (312), and the rotating disk (610) corresponding to the guide posts (312) of the probe docking assembly (320) is also provided with openings, and springs (325) are provided on the guide posts (312) of the probe docking assembly (320).

Images