Mini LED appearance defect detection system

Abstract

The invention is suitable for the technical field of Mini LED appearance detection, and provides a Mini LED appearance defect detection system, which comprises a detection frame, a placement frame and a plurality of LED lamp beads, the placing frame comprises a U-shaped plate; an L-shaped plate is fixed on the bottom surface of the U-shaped plate; the surface of the supporting plate is provided with sliding grooves in sliding fit with the positive electrode welding foot and the negative electrode welding foot. An annular groove communicating with the sliding groove is formed in the surface of the fixing table. A positive electrode welding pin and a negative electrode welding pin on the corresponding LED lamp bead are rotationally arranged in the annular groove; vertical plates are symmetrically fixed on the bottom surface of the fixed table; an L-shaped strip is fixed on the side surface of the L-shaped plate; according to the device, through linkage matching of all the parts, the positions of the positive electrode and the negative electrode of an LED lamp bead adsorbed in the rotating pipe are replaced, so that the positive electrode welding foot and the negative electrode welding foot of the LED lamp bead in the same placing frame are kept to be placed in the same direction, and the LED lamp bead placing efficiency is improved. And the follow-up rapid detection on the appearance defects of the LED lamp beads is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of MiniLED appearance detection technology, and more specifically, to a MiniLED appearance defect detection system. Background Art

[0002] LED devices with chip sizes between 50 and 200 μm are called MiniLEDs. MiniLEDs are the result of the continued reduction in the size of small-pitch LEDs. MiniLED technology is mature and mass production is feasible, and it is expected to be widely used in mid-to-high-end LCD backlights and LED displays. With the rapid development of MiniLED display technology, MiniLED display products have begun to be used in ultra-large-screen high-definition displays, such as monitoring and command, high-definition broadcasting, high-end cinemas, medical diagnosis, advertising displays, conferences and exhibitions, office displays, virtual reality and other commercial fields.

[0003] In terms of controlling the quality of products leaving the factory, machine vision inspection is the main direction of industrial inspection. Defects and errors are inevitable in production, resulting in defective parts or products. Therefore, an inspection link is required at the back end of the assembly line. Since the existing MiniLED tape production process requires the appearance inspection of the front of the LED lamp bead and the periphery of the chip, the appearance inspection is performed by connecting the positive and negative solder pins of the LED lamp bead to the probe during the inspection process. However, due to the uncertainty of the placement of the positive and negative solder pins of the LED lamp bead during the appearance inspection process, the efficiency of appearance defect detection is reduced. At the same time, it is impossible to inspect and screen products with appearance defects or dirt on the front of the LED lamp bead and around the chip, resulting in appearance defects in the inspected LED lamp bead products. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a MiniLED appearance defect detection system, which places each group of LED lamp beads to be detected one by one along the slide groove. Under the action of gravity, adjacent LED lamp beads fit each other, and each LED lamp bead is coaxially arranged with the corresponding annular groove. By controlling the lifting member to rise, the LED lamp beads with reversed positive and negative welding feet are lifted up and sent into the corresponding rotating tubes to be sucked by negative pressure, and each group of rotating tubes is controlled to rotate 180° synchronously to achieve the replacement of the positive and negative positions of the LED lamp beads adsorbed in the rotating tubes, so that the positive and negative welding feet of the LED lamp beads in the same placement rack are kept in the same direction, which is convenient for the subsequent rapid detection of appearance defects of the LED lamp beads and improves the detection efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions: A MiniLED appearance defect detection system comprises a detection frame, a placement frame evenly fixed on the detection frame, and a plurality of LED lamp beads slidably arranged on the placement frame; the LED lamp bead comprises a lamp bead body; a positive electrode welding foot and a negative electrode welding foot are respectively welded on both sides of the front of the lamp bead body; the placement frame comprises a U-shaped plate; an L-shaped plate is fixed to the bottom surface of the U-shaped plate; baffles are fixed at both ends of the U-shaped plate tilted downward; a support plate is arranged at the end of the L-shaped plate tilted downward; a slide groove is provided on the surface of the support plate to slide with the positive electrode welding foot and the negative electrode welding foot; a plurality of fixed platforms are evenly fixed on the surface of the support plate; an annular groove connected with the slide groove is provided on the surface of the fixed platform; the positive electrode welding foot and the negative electrode welding foot on the LED lamp bead are rotatably arranged in the annular groove; vertical plates are symmetrically fixed to the bottom surface of the fixed platform; an L-shaped bar is fixed to the side of the L-shaped plate; each of the vertical plates is fixed on the surface of the L-shaped bar; a lifting member slidingly matched with each relative two vertical plates is slidably arranged on the surface of the L-shaped bar.

[0006] The present invention is further configured as follows: a guide groove is opened on the side of the vertical plate; a fixed plate is fixed between the two relatively vertical plates; the lifting member includes a bottom plate; a plurality of threaded sleeves are evenly fixed on the surface of the bottom plate; a screw is threaded in the threaded sleeve; a slider is fixed on the top of the screw rod and slides with the corresponding two relatively guide grooves; a reset spring is fixed between the top of the slider and the bottom surface of the fixed plate.

[0007] The present invention is further configured as follows: a plastic body is filled inside the lamp bead body; a chip is arranged inside the plastic body; both ends of the chip are electrically connected with gold wires; the two ends of the chip are respectively connected to the positive electrode welding foot and the negative electrode welding foot through gold wires; a first L-shaped rod is fixed to one side of the slider, and a second L-shaped rod is fixed to the other opposite side thereof; the height of the first L-shaped rod is higher than that of the second L-shaped rod; the height of the first L-shaped rod is consistent with the length of the positive electrode welding foot; the height of the second L-shaped rod is consistent with the length of the negative electrode welding foot.

[0008] The present invention is further configured as follows: a first iron block is fixed to the bottom surface of the base plate; a first electromagnetic suction cup is fixed to the surface of the L-shaped strip; a micro-electric control box is fixedly installed between the U-shaped plate and the L-shaped plate by fastening bolts; a control module is arranged inside the micro-electric control box; the output end of the control module is electrically connected to the first electromagnetic suction cup; a shading plate is pasted on the side of the L-shaped strip; the detection frame includes a mounting plate; mounting legs are fixed to the surface of the mounting plate, and a first extension plate and a second extension plate are fixed to the surrounding side surfaces in sequence; a connecting plate is fixed to the end of the first extension plate tilted downward; a Z-shaped plate is fixed to the side of the connecting plate; an infrared travel switch electrically connected to the input end of the control module is installed on the side of the Z-shaped plate; the ends of the first L-shaped rod and the second L-shaped rod are both provided with pressure sensing probes electrically connected to the input end of the control module.

[0009] The present invention is further configured as follows: a number of rotating tubes with sealed tops are evenly penetrated and rotatably arranged on the surface of the connecting plate; a partition is fixed on the inner wall of the rotating tube; a pressure sensor electrically connected to the input end of the control module is installed on the bottom surface of the partition; a first air hole is evenly opened on the surface of the partition; ear tubes are sealed and rotatably arranged on the top of the rotating tube; a positioning plate is fixed on the surface of the connecting plate; an exhaust pipe is penetrated and fixed on the side of the positioning plate; each of the ear tubes is fixed on the exhaust pipe and is evenly connected to the exhaust pipe; a ventilation pipe is connected to the exhaust pipe; and a solenoid valve is arranged on the ventilation pipe.

[0010] The present invention is further configured as follows: a mounting seat is fixed between the first extension plate and the second extension plate; a controller and an air pump are fixed on the surface of the mounting seat in sequence; the air suction end of the air pump and the air suction pipe are connected by a hose; a gear ring is fixed on the side surface of the rotating tube; a sliding sleeve is symmetrically fixed on the surface of the connecting plate; a toothed plate meshing with each gear ring is slidably arranged between the two sliding sleeves; a guide tube is fixed on the side surface of the Z-shaped plate; a sliding rod is slidably arranged inside the guide tube; one end of the sliding rod is fixedly connected to the gear plate, and the other end thereof is connected to the guide tube by a connecting spring; a third iron block is fixed on the end of the sliding rod; a third electromagnetic suction cup electrically connected to the output end of the controller is fixed on the inner wall of the guide tube; the output end of the controller is electrically connected to the air suction pump and the electromagnetic valve, respectively.

[0011] The present invention is further configured as follows: a servo motor electrically connected to an output end of a controller is fixedly mounted on the bottom surface of the mounting seat; a fixed disk is fixed to the output end of the servo motor; a plurality of first ear plates are evenly fixed to the circumferential side of the fixed disk; a second ear plate is fixed to the side of the U-shaped plate; and the first ear plate and the second ear plate are fixedly connected by fastening bolts.

[0012] The present invention is further configured as follows: a plurality of screw holes are evenly opened on the side of the baffle; a clamping piece is screwed in the screw hole; the clamping piece includes a piston cylinder; a piston is slidably arranged inside the piston cylinder; an extrusion spring is connected between the piston and the piston cylinder; a second iron block is fixed to the side of the piston; a second electromagnetic suction cup electrically connected to the output end of the control module is fixed to the inner wall of the piston cylinder; an elastic diaphragm is arranged at the end of the piston cylinder; and a plurality of anti-slip protrusions are evenly arranged on the outer surface of the elastic diaphragm.

[0013] The present invention is further configured as follows: a U-shaped seat is fixed on the side of the second extension plate; limiting grooves are provided on both sides of the inner wall of the U-shaped plate; a slide plate is slidably arranged between the two limiting grooves; a supporting spring is symmetrically connected between the slide plate and the U-shaped seat; a first armature column is fixed on the bottom surface of the slide plate; a first electromagnetic coil electrically connected to the output end of the controller is installed on the inner bottom surface of the U-shaped seat; a cross plate is fixed to the end of the slide plate; support plates are symmetrically fixed on both ends of the cross plate; a guide rod is fixed between the two relatively support plates; a second electromagnetic coil and a third electromagnetic coil electrically connected to the output end of the controller are installed in sequence between the two adjacent support plates at both ends of the cross plate; a sliding box is slidably arranged between the two guide rods; a mounting spring sleeved on the corresponding guide rod is fixedly connected between the sliding box and each support plate; a number of second air holes are evenly arranged on the bottom surface of the sliding box; the sliding box is connected to the air outlet end of the vacuum pump by a hose; a second armature column and a third armature column are installed in sequence on two opposite sides of the sliding box.

[0014] The present invention is further configured as follows: an image recognition module is fixedly installed on the side of the U-shaped seat; the image recognition module includes a high-definition camera and an identification host electrically connected to the high-definition camera; a first inclined plate and a second inclined plate for placing qualified products and defective products are installed on two opposite sides of the U-shaped seat in sequence, tilted downward; the surfaces of the first inclined plate and the second inclined plate are provided with mounting grooves that slide with the positive electrode welding foot and the negative electrode welding foot; an electric push rod electrically connected to the output end of the controller is fixed on the side of the second inclined plate; a power-on seat is fixed to the telescopic end of the electric push rod; and a positive electrode detection probe and a negative electrode detection probe are electrically connected to the surface of the power-on seat in sequence.

[0015] The advantages of the present invention are: The LED lamp beads in the same placement rack of the present invention are coaxially arranged with the corresponding annular grooves, and the lifting member is controlled to rise, so that the LED lamp beads with the positive and negative welding legs reversed are lifted up and sent into the corresponding rotating tubes to be sucked by negative pressure, and each group of rotating tubes is controlled to rotate 180 degrees synchronously, and the positive and negative positions of the LED lamp beads adsorbed in the rotating tubes are replaced, so that the positive and negative welding legs of the LED lamp beads in the same placement rack are kept in the same direction, which is convenient for the subsequent rapid detection of appearance defects of the LED lamp beads and improves the detection efficiency.

[0016] When inspecting appearance defects, the present invention adsorbs the fixed LED lamp beads through the sliding box, pulls out the corresponding LED lamp beads and aligns them with the image recognition module, then controls the positive electrode detection probe and the negative electrode detection probe to extend and conduct at the positive electrode welding foot and the negative electrode welding foot, drives the chip set inside the LED lamp bead to light up, and the chip releases light to illuminate the front of the LED lamp bead and the surrounding of the chip, so that the camera can take clear images of the front of the LED lamp bead and the surrounding of the chip, and save them inside the host, so as to identify and screen defective products, thereby improving the appearance quality of the inspected LED lamp bead products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a MiniLED appearance defect detection system of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the detection frame of the present invention.

[0019] Figure 3 For the present invention Figure 2 A magnified image of area A.

[0020] Figure 4 It is a structural schematic diagram of the detection frame of the present invention from another angle.

[0021] Figure 5 For the present invention Figure 4 A magnified view of area B.

[0022] Figure 6 It is a structural schematic diagram of the placement rack of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the placement rack of the present invention when viewed from above.

[0024] Figure 8 For the present invention Figure 7 Magnified view of area C.

[0025] Fig. 9 It is a schematic diagram of the structure of the LED lamp bead of the present invention.

[0026] Fig.10 It is a schematic structural diagram of the pressing member of the present invention.

[0027] Fig.11 It is a structural schematic diagram of the lifting member of the present invention.

[0028] Fig.12 It is a structural schematic diagram of the placement rack and LED lamp bead assembly of the present invention.

[0029] Fig.13 For the present invention Figure 1 Schematic diagram of the structure from a frontal perspective.

[0030] Fig.14 For the present invention Fig.13 Magnified view of area D.

[0031] Fig.15 For the present invention Figure 1 A schematic diagram of the structure from another angle.

[0032] Fig.16 For the present invention Fig.15 Enlarged view of area E.

[0033] In the figure: 1. detection rack; 2. placement rack; 3. LED lamp beads; 4. lamp bead body; 5. positive electrode welding foot; 6. negative electrode welding foot; 7. U-shaped plate; 8. L-shaped plate; 9. baffle; 10. slideway; 11. fixed platform; 12. annular groove; 13. vertical plate; 14. L-shaped strip; 15. lifting member; 16. guide groove; 17. fixed plate; 18. bottom plate; 19. threaded sleeve; 20. slider; 21. reset spring; 22. plastic body; 23. wafer; 24. gold wire; 25. first L-shaped rod ; 26, second L-shaped rod; 27, first iron block; 28, first electromagnetic suction cup; 29, micro electric control box; 30, shading plate; 31, mounting plate; 32, mounting leg; 33, first extension plate; 34, second extension plate; 35, connecting plate; 36, Z-shaped plate; 37, infrared travel switch; 38, rotating tube; 39, partition; 40, first air hole; 41, ear tube; 42, positioning plate; 43, exhaust pipe; 44, ventilation pipe; 45, solenoid valve; 46, mounting seat; 47, controller; 48. vacuum pump; 49. gear ring; 50. sleeve; 51. gear plate; 52. guide tube; 53. slide rod; 54. servo motor; 55. fixed plate; 56. first ear plate; 57. second ear plate; 58. screw hole; 59. pressing piece; 60. piston cylinder; 61. piston; 62. extrusion spring; 63. second iron block; 64. second electromagnetic suction cup; 65. elastic diaphragm; 66. U-shaped seat; 67. limit groove; 68. slide plate; 69. support spring; 70. first armature column; 71. The first electromagnetic coil; 72, the horizontal plate; 73, the support plate; 74, the guide rod; 75, the second electromagnetic coil; 76, the third electromagnetic coil; 77, the sliding box; 78, the second air hole; 79, the second armature column; 80, the third armature column; 81, the image recognition module; 82, the first inclined plate; 83, the second inclined plate; 84, the mounting groove; 85, the electric push rod; 86, the power socket; 87, the positive pole detection probe; 88, the negative pole detection probe; 89, the baffle; 90, the mounting spring; 91, the pressure sensor. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0037] For example, see Figure 1-16 , the present invention provides the following technical solutions: A MiniLED appearance defect detection system, specifically, comprises a detection frame 1, a placement frame 2 uniformly fixed on the detection frame 1, and a plurality of LED lamp beads 3 slidably arranged on the placement frame 2; the LED lamp beads 3 comprise a lamp bead body 4; a positive electrode welding foot 5 and a negative electrode welding foot 6 are respectively welded on both sides of the front of the lamp bead body 4; the placement frame 2 comprises a U-shaped plate 7; an L-shaped plate 8 is fixed to the bottom surface of the U-shaped plate 7; baffles 89 are fixed at both ends of the U-shaped plate 7 tilted downward; a support plate 9 is arranged at the end of the L-shaped plate 8 tilted downward; a surface of the support plate 9 is provided with a A slide groove 10 is slidably matched with the positive electrode welding leg 5 and the negative electrode welding leg 6; a plurality of fixing platforms 11 are evenly fixed on the surface of the support plate 9; an annular groove 12 connected with the slide groove 10 is provided on the surface of the fixing platform 11; the positive electrode welding leg 5 and the negative electrode welding leg 6 on the corresponding LED lamp bead 3 are rotatably arranged in the annular groove 12; vertical plates 13 are symmetrically fixed on the bottom surface of the fixing platform 11; an L-shaped bar 14 is fixed on the side of the L-shaped plate 8; each vertical plate 13 is fixed on the surface of the L-shaped bar 14; a lifting member 15 that slidably matches with each opposite vertical plate 13 is slidably arranged on the surface of the L-shaped bar 14.

[0038] The working principle of the first embodiment is as follows: each group of LED lamp beads 3 to be detected is placed one by one along the slide groove 10, and the positive electrode welding foot 5 and the negative electrode welding foot 6 slide in the slide groove 10. Under the action of gravity, the adjacent LED lamp beads 3 are fitted with each other, and each LED lamp bead 3 is coaxially arranged with the corresponding annular groove 12. At this time, the positive electrode welding foot 5 and the negative electrode welding foot 6 on each group of LED lamp beads 3 are placed in the corresponding annular groove 12, and the lifting member 15 is controlled to rise, and the LED lamp beads 3 with the positive electrode welding foot 5 and the negative electrode welding foot 6 reversed are lifted up and sent into the corresponding rotating tube 38, and are sucked by negative pressure, and each group of rotating tubes 38 is controlled to rotate synchronously by 180°, so as to realize the replacement of the position of the positive electrode welding foot 5 and the negative electrode welding foot 6 of the LED lamp beads 3 adsorbed in the rotating tube 38, so that the positive electrode welding foot 5 and the negative electrode welding foot 6 of the LED lamp beads 3 in the same placement rack 2 are kept in the same direction, which is convenient for the subsequent rapid detection of the appearance defects of the LED lamp beads 3 and improves the detection efficiency.

[0039] For example 2, please refer to Figure 1-16The second embodiment is improved on the basis of the first embodiment as follows. Specifically, a guide groove 16 is provided on the side of the vertical plate 13; a fixing plate 17 is fixed between the two opposite vertical plates 13; the lifting member 15 includes a bottom plate 18; a plurality of threaded sleeves 19 are evenly fixed on the surface of the bottom plate 18; a screw is screwed in the threaded sleeve 19; a slider 20 is fixed on the top of the screw to slide with the two corresponding guide grooves 16; a return spring 21 is fixed between the top of the slider 20 and the bottom of the fixing plate 17; a plastic body 22 is filled inside the lamp bead body 4; a crystal is arranged inside the plastic body 22 The wafer 23 is electrically connected to both ends of the wafer 23 with gold wires 24; the two ends of the wafer 23 are respectively connected to the positive electrode welding leg 5 and the negative electrode welding leg 6 through the gold wires 24; a first L-shaped rod 25 is fixed to one side of the slider 20, and a second L-shaped rod 26 is fixed to the other opposite side thereof; the height of the first L-shaped rod 25 is higher than the second L-shaped rod 26; the height of the first L-shaped rod 25 is consistent with the length of the positive electrode welding leg 5; the height of the second L-shaped rod 26 is consistent with the length of the negative electrode welding leg 6; a first iron block 27 is fixed to the bottom surface of the bottom plate 18; a first electromagnetic chuck 28 is fixed to the surface of the L-shaped bar 14; A micro electric control box 29 is fixedly installed between the U-shaped plate 7 and the L-shaped plate 8 by fastening bolts; a control module is arranged inside the micro electric control box 29; the output end of the control module is electrically connected to the first electromagnetic suction cup 28; a light shielding plate 30 is pasted on the side of the L-shaped strip 14; the detection frame 1 includes a mounting plate 31; a mounting leg 32 is fixed on the surface of the mounting plate 31, and a first extension plate 33 and a second extension plate 34 are fixed on the side of the mounting plate 31 in sequence; a connecting plate 35 is fixed on the end of the first extension plate 33 tilted downward; a Z-shaped plate 36 is fixed on the side of the connecting plate 35; An infrared travel switch 37 electrically connected to the input end of the control module is installed on the surface; the ends of the first L-shaped rod 25 and the second L-shaped rod 26 are provided with pressure sensing probes electrically connected to the input end of the control module; a servo motor 54 electrically connected to the output end of the controller 47 is fixedly installed on the bottom surface of the mounting seat 46; a fixing plate 55 is fixed to the output end of the servo motor 54; a plurality of first ear plates 56 are evenly fixed on the side surface of the fixing plate 55; a second ear plate 57 is fixed to the side surface of the U-shaped plate 7; the first ear plate 56 and the second ear plate 57 are fixedly connected by fastening bolts.

[0040] The working principle of the second embodiment is as follows: the servo motor 54 is controlled to start and drive the fixed plate 55 to rotate. When the shading plate 30 on a set of placement racks 2 rotates to block the infrared travel switch 37, the infrared travel switch 37 transmits a signal to the controller 47. The controller 47 controls the servo motor 54 to stop. The controller 47 is connected with each control module through communication. At the same time, the first electromagnetic suction cup 28 is controlled to lose power. Under the elastic reset force of the reset spring 21, the lifting member 15 is driven to rise. Note that along the length direction of the baffle 89, the positive electrode welding foot 5 on the LED lamp bead 3 is on the right, and the negative electrode welding foot 6 is on the left. This type of LED lamp bead 3 is in the correct placement position. The positive electrode welding foot 5 is on the left and the negative electrode welding foot 6 is on the right, which is a reversed state. When the lifting member 15 rises, the positive electrode welding foot 5 on the LED lamp bead 3 in the reversed state contacts the corresponding first L-shaped rod 25 first, and the pressure sensing probe on the corresponding first L-shaped rod 25 is triggered first, and the corresponding second L-shaped rod 26 never contacts the corresponding negative electrode welding foot 6. When the lifting member 15 rises, each group of LED lamp beads 3 in the reversed state are synchronously lifted up, and the lifted LED lamp beads 3 are inserted into the corresponding rotating tubes 38, while the LED lamp beads 3 in the correctly placed state remain motionless, thereby completing the rapid positioning and extraction of the LED lamp beads 3 in the reversed state.

[0041] For example 3, please refer to Figure 1-16 , the third embodiment of the present invention is improved as follows on the basis of the second embodiment. Specifically, a plurality of rotating tubes 38 with sealed tops are evenly and rotatably arranged on the surface of the connecting plate 35; a partition 39 is fixed on the inner wall of the rotating tube 38; a pressure sensor 91 electrically connected to the input end of the control module is installed on the bottom surface of the partition 39; a first air hole 40 is evenly opened on the surface of the partition 39; an ear tube 41 is sealed and rotatably arranged on the top of the rotating tube 38; a positioning plate 42 is fixed on the surface of the connecting plate 35; an exhaust pipe 43 is fixed on the side of the positioning plate 42; each ear tube 41 is fixed on the exhaust pipe 43, and the exhaust pipe 43 is evenly connected; a ventilation pipe 44 is connected to the exhaust pipe 43; an electromagnetic valve 45 is arranged on the ventilation pipe 44; a mounting seat 4 is fixed between the first extension plate 33 and the second extension plate 34 6; a controller 47 and an air pump 48 are fixed to the surface of the mounting seat 46 in sequence; the air extraction end of the air pump 48 is connected to the air extraction pipe 43 through a hose; a gear ring 49 is fixed to the side surface of the rotating tube 38; a sliding sleeve 50 is symmetrically fixed to the surface of the connecting plate 35; a tooth plate 51 meshing with each gear ring 49 is slidably arranged between the two sliding sleeves 50; a guide tube 52 is fixed to the side surface of the Z-shaped plate 36; a sliding rod 53 is slidably arranged inside the guide tube 52; one end of the sliding rod 53 is fixedly connected to the tooth plate 51, and the other end thereof is connected to the guide tube 52 by a connecting spring; a third iron block is fixed to the end of the sliding rod 53; a third electromagnetic suction cup electrically connected to the output end of the controller 47 is fixed to the inner wall of the guide tube 52; the output end of the controller 47 is electrically connected to the air extraction pump 48 and the electromagnetic valve 45, respectively.

[0042] The working principle of the third embodiment is as follows: the lifted LED lamp bead 3 is inserted into the corresponding rotating tube 38 and squeezed to the corresponding pressure sensor 91. The corresponding pressure sensor 91 transmits a signal to the controller 47. The controller 47 controls the vacuum pump 48 to start. A closed environment is formed between the lamp holder 4 and the corresponding rotating tube 38. The air therein is extracted through the corresponding ear tube 41 to form a negative pressure environment, thereby achieving the adsorption and fixation of the corresponding reversed LED lamp bead 3. The third electromagnetic suction cup is controlled to be energized to attract the third iron block, so that the slide bar 53 is stored in the guide tube 52. The corresponding connecting spring is compressed, thereby driving the tooth plate 51 to slide, and then driving each group of rotating The movable tube 38 rotates 180° together with the corresponding LED lamp beads 3 to realize synchronous rotation of each group of LED lamp beads 3 in the reversed state, so that the initial state of the positive electrode welding foot 5 on the left and the negative electrode welding foot 6 on the right is converted to the positive electrode welding foot 5 on the right and the negative electrode welding foot 6 on the left. After completion, the vacuum pump 48 is controlled to stop working and the first electromagnetic suction cup 28 is controlled to be energized, so that the lifting member 15 descends, and at the same time, under the action of gravity, each group of LED lamp beads 3 descends synchronously, and the positive electrode welding foot 5 and the negative electrode welding foot 6 of the LED lamp beads 3 in the same placement rack 2 are kept in the same direction, which is convenient for the subsequent rapid detection of appearance defects of the LED lamp beads 3 and improves the detection efficiency.

[0043] Example 4, please refer to Figure 1-16 , the fourth embodiment makes the following improvements on the basis of the third embodiment. Specifically, a baffle 89 is evenly provided with a plurality of screw holes 58; a pressing member 59 is screwed into the screw hole 58; the pressing member 59 includes a piston cylinder 60; a piston 61 is slidably arranged inside the piston cylinder 60; an extrusion spring 62 is connected between the piston 61 and the piston cylinder 60; a second iron block 63 is fixed to the side of the piston 61; a second electromagnetic suction cup 64 electrically connected to the output end of the control module is fixed to the inner wall of the piston cylinder 60; an elastic diaphragm 65 is arranged at the end of the piston cylinder 60; and a plurality of anti-slip protrusions are evenly arranged on the outer surface of the elastic diaphragm 65.

[0044] The working principle of the fourth embodiment of the present invention is as follows: after completing the loading of each group of LED lamp beads 3, the control module controls each group of second electromagnetic suction cups 64 to lose power synchronously, and under the elastic reset force of the extrusion spring 62, drives the piston 61 to move along the piston cylinder 60 toward the elastic diaphragm 65, so that the elastic diaphragm 65 is expanded and presses the corresponding LED lamp beads 3, and when the pressure sensing probe on the corresponding first L-shaped rod 25 is triggered first, the corresponding pressure sensing probe transmits the signal to the control module, controls the corresponding second electromagnetic suction cup 64 to be energized to attract the second iron block 63, so that the expanded elastic diaphragm 65 is reset, and the limit on the corresponding lamp holder 4 is released, that is, it is ensured that each LED lamp bead 3 in the correctly placed state remains in a clamped state to prevent it from being affected by the movement of adjacent LED lamp beads 3, thereby improving the practicability of the device and ensuring the normal movement of the LED lamp beads 3 in the reversed state.

[0045] For example 5, please refer to Figure 1-16 , the fifth embodiment is improved as follows on the basis of the fourth embodiment. Specifically, a U-shaped seat 66 is fixed on the side of the second extension plate 34; both sides of the inner wall of the U-shaped plate 7 are provided with a limit groove 67; a slide plate 68 is slidably arranged between the two limit grooves 67; a support spring 69 is symmetrically connected between the slide plate 68 and the U-shaped seat 66; a first armature column 70 is fixed to the bottom surface of the slide plate 68; a first electromagnetic coil 71 electrically connected to the output end of the controller 47 is installed on the inner bottom surface of the U-shaped seat 66; a cross plate 72 is fixed to the end of the slide plate 68; support plates 73 are symmetrically fixed at both ends of the cross plate 72; a guide rod 74 is fixed between the two opposite support plates 73; the second electromagnetic coil 75 and the third electromagnetic coil 76 electrically connected to the output end of the controller 47 are installed in sequence at both ends of the cross plate 72 between the adjacent two support plates 73; a sliding box 77 is slidably arranged between the two guide rods 74; the sliding box 77 and each support plate 73 are fixedly connected with an installation sleeved on the corresponding guide rod 74 A spring 90 is installed; a plurality of second air holes 78 are evenly provided on the bottom surface of the sliding box 77; the sliding box 77 is connected to the air outlet of the vacuum pump 48 by a hose; a second armature column 79 and a third armature column 80 are installed in sequence on two opposite sides of the sliding box 77; an image recognition module 81 is fixedly installed on the side of the U-shaped seat 66; the image recognition module 81 includes a high-definition camera and an identification host electrically connected to the high-definition camera; a first inclined plate 82 and a second inclined plate 83 for placing qualified products and defective products are installed in sequence on two opposite sides of the U-shaped seat 66 tilted downward; the surfaces of the first inclined plate 82 and the second inclined plate 83 are provided with mounting grooves 84 that slide with the positive electrode welding foot 5 and the negative electrode welding foot 6; an electric push rod 85 that is electrically connected to the output end of the controller 47 is fixed on the side of the second inclined plate 83; an energizing seat 86 is fixed on the telescopic end of the electric push rod 85; the surface of the energizing seat 86 is electrically connected to a positive electrode detection probe 87 and a negative electrode detection probe 88 in sequence.

[0046] Working principle of the fifth embodiment: after completing the replacement of the positive electrode welding foot 5 and the negative electrode welding foot 6 of each group of LED lamp beads 3 in the placement state, the corresponding placement rack 2 is controlled to rotate until the shading plate 30 on the next group of placement racks 2 blocks the infrared travel switch 37, and the rotation is stopped. In the initial state, the first electromagnetic coil 71 is energized to attract the first armature column 70, and the corresponding support spring 69 is compressed. At this time, the placement rack 2 that has completed the replacement of the positive electrode welding foot 5 and the negative electrode welding foot 6 is placed directly under the U-shaped seat 66. At this time, the lowest LED lamp bead is placed directly under the sliding box 77, and the vacuum pump 48 is controlled to start to extract the air in the sliding box 77 to form a negative pressure environment, thereby the corresponding LED lamp bead 3 The first electromagnetic coil 71 is sucked tightly and controlled to lose power. Under the elastic restoring force of the supporting spring 69, the horizontal plate 72 and the sucked LED lamp bead 3 are driven to rise until they are aligned with the image recognition module 81. The electric push rod 85 is controlled to start, driving the positive electrode detection probe 87 and the negative electrode detection probe 88 to extend and conduct at the positive electrode welding foot 5 and the negative electrode welding foot 6, driving the chip 23 set inside the LED lamp bead 3 to light up, and the chip 23 releases light to illuminate the front of the LED lamp bead 3 and the surrounding area of ​​the chip, so that the camera can take a clear image of the front of the LED lamp bead 3 and the surrounding area of ​​the chip, and save it inside the host, so as to identify and screen defective products and improve the appearance quality of the inspected LED lamp bead 3 products.

[0047] When the LED lamp bead 3 is judged to be a qualified product, the second electromagnetic coil 75 is controlled to be energized to attract the second armature column 79, driving the cross plate 72 together with the adsorbed LED lamp bead 3 to move to the top of the first inclined plate 82, and a conducting pipe is arranged on the hose between the sliding box 77 and the vacuum pump 48, and an electromagnetic valve is arranged on the conducting pipe. The electromagnetic valve is controlled to open to release the negative pressure environment of the sliding box 77, and under the action of gravity, the positive electrode welding foot 5 and the negative electrode welding foot 6 on the qualified LED lamp bead 3 fall into the corresponding installation groove 84 and are stored; when the LED lamp bead 3 is judged to be an unqualified product, the third electromagnetic coil 76 is controlled to be energized to attract the third armature column 80, and the above operation is performed similarly, so that the positive electrode welding foot 5 and the negative electrode welding foot 6 on the unqualified LED lamp bead 3 fall into the corresponding installation groove 84 and are stored.

[0048] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0052] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A MiniLED appearance defect detection system, comprising a detection frame (1), a placement frame (2) uniformly fixed on the detection frame (1), and a plurality of LED lamp beads (3) slidably arranged on the placement frame (2); characterized in that: The LED lamp bead (3) comprises a lamp bead body (4); a positive electrode welding foot (5) and a negative electrode welding foot (6) are respectively welded on both sides of the front side of the lamp bead body (4); The placement rack (2) comprises a U-shaped plate (7); an L-shaped plate (8) is fixed to the bottom surface of the U-shaped plate (7); baffles (89) are fixed at both ends of the U-shaped plate (7) in a manner tilted downward; a support plate (9) is provided at the end of the L-shaped plate (8) in a manner tilted downward; a sliding groove (10) is provided on the surface of the support plate (9) for slidingly cooperating with the positive electrode welding leg (5) and the negative electrode welding leg (6); A plurality of fixing platforms (11) are evenly fixed on the surface of the support plate (9); an annular groove (12) communicating with the slide groove (10) is provided on the surface of the fixing platform (11); the positive electrode welding pin (5) and the negative electrode welding pin (6) on the LED lamp bead (3) are rotatably arranged in the annular groove (12); The bottom surface of the fixed platform (11) is symmetrically fixed with vertical plates (13); the side surface of the L-shaped plate (8) is fixed with an L-shaped strip (14); each of the vertical plates (13) is fixed on the surface of the L-shaped strip (14); and the surface of the L-shaped strip (14) is slidably provided with a lifting member (15) that slidably cooperates with each of the two opposite vertical plates (13).

2. The MiniLED appearance defect detection system according to claim 1, characterized in that: The vertical plate (13) is provided with a guide groove (16) on the side surface; a fixing plate (17) is fixed between the two vertical plates (13) opposite to each other; the lifting member (15) comprises a bottom plate (18); a plurality of threaded sleeves (19) are evenly fixed on the surface of the bottom plate (18); a screw rod is threaded in the threaded sleeve (19); a slider (20) is fixed on the top of the screw rod and is slidably matched with the two corresponding guide grooves (16); a return spring (21) is fixed between the top of the slider (20) and the bottom surface of the fixing plate (17).

3. The MiniLED appearance defect detection system according to claim 2, characterized in that: The interior of the lamp bead body (4) is filled with a plastic body (22); a chip (23) is arranged inside the plastic body (22); both ends of the chip (23) are electrically connected to gold wires (24); the two ends of the chip (23) are respectively connected to the positive electrode welding foot (5) and the negative electrode welding foot (6) through the gold wires (24); A first L-shaped rod (25) is fixed to one side of the slider (20), and a second L-shaped rod (26) is fixed to the other opposite side thereof; the first L-shaped rod (25) is higher than the second L-shaped rod (26); the height of the first L-shaped rod (25) is consistent with the length of the positive electrode welding leg (5); and the height of the second L-shaped rod (26) is consistent with the length of the negative electrode welding leg (6).

4. The MiniLED appearance defect detection system according to claim 3, characterized in that: A first iron block (27) is fixed to the bottom surface of the bottom plate (18); a first electromagnetic suction cup (28) is fixed to the surface of the L-shaped strip (14); a micro-electric control box (29) is fixedly installed between the U-shaped plate (7) and the L-shaped plate (8) by means of fastening bolts; a control module is arranged inside the micro-electric control box (29); an output end of the control module is electrically connected to the first electromagnetic suction cup (28); a light shielding plate (30) is attached to the side surface of the L-shaped strip (14); The detection frame (1) comprises a mounting plate (31); a mounting leg (32) is fixed on the surface of the mounting plate (31), and a first extension plate (33) and a second extension plate (34) are fixed to the circumferential side surfaces thereof in sequence; a connecting plate (35) is fixed to the end of the first extension plate (33) in an inclined manner downward; a Z-shaped plate (36) is fixed to the side of the connecting plate (35); an infrared travel switch (37) electrically connected to the input end of a control module is installed on the side of the Z-shaped plate (36); and pressure sensing probes electrically connected to the input end of the control module are arranged at the ends of the first L-shaped rod (25) and the second L-shaped rod (26).

5. The MiniLED appearance defect detection system according to claim 4, characterized in that: The surface of the connection plate (35) is evenly penetrated and rotatably provided with a plurality of rotating tubes (38) with sealed tops; a partition (39) is fixed to the inner wall of the rotating tube (38); a pressure sensor (91) electrically connected to the input end of a control module is installed on the bottom surface of the partition (39); a first air hole (40) is evenly opened on the surface of the partition (39); an ear tube (41) is sealed and rotatably provided on the top of the rotating tube (38); a positioning plate (42) is fixed to the surface of the connection plate (35); an exhaust pipe (43) is penetrated and fixed to the side of the positioning plate (42); each of the ear tubes (41) is fixed on the exhaust pipe (43) and is evenly connected to the exhaust pipe (43); a ventilation pipe (44) is connected to the exhaust pipe (43); and a solenoid valve (45) is provided on the ventilation pipe (44).

6. The MiniLED appearance defect detection system according to claim 5, characterized in that: A mounting seat (46) is fixed between the first extension plate (33) and the second extension plate (34); a controller (47) and an air pump (48) are fixed to the surface of the mounting seat (46) in sequence; an air pumping end of the air pump (48) is connected to the air pumping pipe (43) via a hose; a gear ring (49) is fixed to the side surface of the rotating tube (38); sliding sleeves (50) are symmetrically fixed to the surface of the connecting plate (35); a gear plate (51) meshing with each gear ring (49) is slidably arranged between the two sliding sleeves (50); the Z A guide tube (52) is fixed to the side of the toothed plate (36); a slide rod (53) is slidably arranged inside the guide tube (52); one end of the slide rod (53) is fixedly connected to the toothed plate (51), and a connecting spring is connected between the other end of the slide rod and the guide tube (52); a third iron block is fixed to the end of the slide rod (53); a third electromagnetic suction cup electrically connected to the output end of the controller (47) is fixed to the inner wall of the guide tube (52); and the output end of the controller (47) is electrically connected to the air pump (48) and the electromagnetic valve (45), respectively.

7. The MiniLED appearance defect detection system according to claim 6, characterized in that: A servo motor (54) electrically connected to an output end of a controller (47) is fixedly mounted on the bottom surface of the mounting seat (46); a fixing plate (55) is fixed to the output end of the servo motor (54); a plurality of first ear plates (56) are evenly fixed to the side surface of the fixing plate (55); a second ear plate (57) is fixed to the side surface of the U-shaped plate (7); and the first ear plate (56) and the second ear plate (57) are fixedly connected by fastening bolts.

8. The MiniLED appearance defect detection system according to claim 7, characterized in that: A plurality of screw holes (58) are evenly formed on the side of the baffle (89); a pressing member (59) is screwed into the screw hole (58); the pressing member (59) comprises a piston cylinder (60); a piston (61) is slidably arranged inside the piston cylinder (60); a compression spring (62) is connected between the piston (61) and the piston cylinder (60); a second iron block (63) is fixed to the side of the piston (61); a second electromagnetic suction cup (64) electrically connected to the output end of the control module is fixed to the inner wall of the piston cylinder (60); an elastic diaphragm (65) is arranged at the end of the piston cylinder (60); and a plurality of anti-slip protrusions are evenly arranged on the outer surface of the elastic diaphragm (65).

9. The MiniLED appearance defect detection system according to claim 8, characterized in that: A U-shaped seat (66) is fixed to the side of the second extension plate (34); limiting grooves (67) are provided on both sides of the inner wall of the U-shaped plate (7); a slide plate (68) is slidably arranged between the two limiting grooves (67); a support spring (69) is symmetrically connected between the slide plate (68) and the U-shaped seat (66); a first armature column (70) is fixed to the bottom surface of the slide plate (68); and a first electromagnetic coil (71) electrically connected to the output end of the controller (47) is installed on the inner bottom surface of the U-shaped seat (66); A transverse plate (72) is fixed to the end of the slide plate (68); support plates (73) are symmetrically fixed to both ends of the transverse plate (72); a guide rod (74) is fixed between two opposing support plates (73); a second electromagnetic coil (75) and a third electromagnetic coil (76) are sequentially installed between two adjacent support plates (73) at both ends of the transverse plate (72) and are electrically connected to the output end of the controller (47); A sliding box (77) is slidably arranged between the two guide rods (74); a mounting spring (90) sleeved on the corresponding guide rod (74) is fixedly connected between the sliding box (77) and each support plate (73); a plurality of second air holes (78) are evenly arranged on the bottom surface of the sliding box (77); the sliding box (77) is connected to the air outlet of the air pump (48) through a hose; and a second armature column (79) and a third armature column (80) are sequentially mounted on two opposite side surfaces of the sliding box (77).

10. The MiniLED appearance defect detection system according to claim 9, characterized in that: An image recognition module (81) is fixedly mounted on the side of the U-shaped seat (66); the image recognition module (81) comprises a high-definition camera and a recognition host electrically connected to the high-definition camera; a first inclined plate (82) and a second inclined plate (83) for placing qualified products and defective products are successively installed on two opposite side surfaces of the U-shaped seat (66) in an inclined manner downward; the surfaces of the first inclined plate (82) and the second inclined plate (83) are provided with mounting grooves (84) for slidingly cooperating with the positive electrode welding leg (5) and the negative electrode welding leg (6); An electric push rod (85) electrically connected to an output end of a controller (47) is fixed to the side surface of the second inclined plate (83); an electric socket (86) is fixed to the telescopic end of the electric push rod (85); and a positive electrode detection probe (87) and a negative electrode detection probe (88) are electrically connected in sequence to the surface of the electric socket (86).

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