Visual inspection device for backlight module

Abstract

The utility model discloses a backlight module visual inspection device, and belongs to the technical field of visual inspection. The device mainly comprises a first base, and a working table is arranged on the first base; the detection station is fixed on the working table through bolts, and two groups of detection grooves are formed in the detection station; and the pre-detection assembly is arranged on the working table. According to the backlight module visual inspection device, the first rack, the second rack, the gear, the cleaning sliding rail and the cleaning brush are arranged, when the suction cup is driven by the sliding part to move, the cleaning brush moves synchronously, the cleaning brush and the suction cup move relatively and make contact, the cleaning brush cleans the bottom of the suction cup, and the cleaning efficiency of the suction cup is improved. And dust adhering to the suction cup is removed, so that the effect of cleaning the mechanical clamp is achieved, and the dust on the mechanical clamp is prevented from affecting subsequent visual detection of the backlight module.

Description

Technical Field

[0001] This application relates to the field of visual inspection technology, specifically a visual inspection device for backlight modules. Background Technology

[0002] The backlight module is one of the key components in LCD display devices. Its main function is to provide a uniform and stable light source for the LCD panel, enabling images to be displayed clearly. Since the liquid crystal itself does not emit light, it must rely on the backlight module to achieve the visual display effect. The quality of the backlight module directly affects the key performance indicators of the display device, such as brightness, contrast, color performance, and energy consumption. Visual inspection of the backlight module is a key quality control link in the modern display panel manufacturing field, using machine vision technology to achieve high-precision and high-efficiency defect identification and quality control.

[0003] Existing backlight module visual inspection devices typically consist of two main parts: a mechanical transmission component and an optical imaging component. The mechanical transmission component transports backlight modules in batches, while the optical imaging component performs visual inspection on the backlight modules during the transport process and sends the inspection results to an external data analysis device.

[0004] Although the aforementioned device completes the visual inspection of backlight modules, backlight module visual inspection is usually performed in batches using automation. Workers only need to place batches of backlight modules on mechanical transmission components, and then a mechanical gripper picks up each backlight module for individual inspection. Since one set of mechanical grippers needs to contact multiple sets of backlight modules, and the mechanical grippers need to move constantly, after long-term use, the mechanical grippers that pick up the backlight modules inevitably accumulate dust and other impurities. When a mechanical gripper with some dust continues to pick up backlight modules, it will carry the dust to other backlight modules. If the mechanical grippers are not cleaned regularly, it will affect the subsequent visual inspection of backlight modules. Therefore, it is necessary to provide a backlight module visual inspection device to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a visual inspection device for backlight modules, which solves the problem of not being able to regularly clean the mechanical transmission components for gripping backlight modules.

[0007] The technical solution adopted by this application to solve its technical problem is: a visual inspection device for a backlight module, comprising: a first base on which a worktable is provided; an inspection station fixed to the worktable by bolts, the inspection station having two sets of inspection slots; a pre-inspection component disposed on the worktable, the pre-inspection component including a first slide rail fixedly installed on both sides of the worktable, the first slide rail having a first sliding member slidably installed thereon; a second slide rail fixedly installed on the first sliding member, the second slide rail having a second sliding member slidably installed thereon; and a vertical slide rail fixedly installed on the second sliding member. On one side, a third sliding member is fixedly installed on one side of the vertical slide rail; a box body is fixedly installed on one side of the third sliding member, a blower box is fixedly installed inside the box body, at least two sets of suction cups are fixedly installed at the bottom of the blower box, and an imaging component is also fixedly installed on one side of the box body; a connecting rod is fixedly installed at the bottom of the second slide rail, a first rack is fixedly installed at the bottom of the connecting rod, a gear is engaged on one side of the first rack, and a second rack is engaged on one side of the gear; a cleaning brush is disposed on the workbench, a connecting plate is fixedly installed on one side of the cleaning brush, and the other end of the connecting plate is fixedly connected to the second rack.

[0008] Furthermore, a cleaning slide rail is fixedly installed on the workbench, and the cleaning slide rail is slidably connected to the bottom of the cleaning brush.

[0009] Furthermore, a rotating shaft is rotatably connected to the center of the gear via a bearing, and the bottom of the rotating shaft is rotatably connected to the worktable surface via a bearing.

[0010] Furthermore, a PLC control system is provided inside the first base, and a drive device is provided on the workbench, the drive device being electrically connected to the PLC control system.

[0011] Furthermore, a second base is provided on one side of the first base, and a second conveyor belt is fixedly installed on the second base.

[0012] Furthermore, a third base is provided on the other side of the first base, and a first conveyor belt is fixedly installed on the third base. At least two sets of conveying tracks are provided on the first conveyor belt.

[0013] The beneficial effects of this application are as follows: The visual inspection device for a backlight module provided by this application is equipped with a first rack, a second rack, a gear, a cleaning slide rail, and a cleaning brush. When the suction cup moves under the drive of the sliding component, the cleaning brush moves synchronously. The cleaning brush moves relative to and contacts the suction cup, and the cleaning brush cleans the bottom of the suction cup, removing the dust adhering to the suction cup, thereby achieving the function of cleaning the mechanical fixture, so as to avoid the dust on the mechanical fixture affecting the subsequent visual inspection of the backlight module.

[0014] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is an overall schematic diagram of a backlight module visual inspection device according to this application;

[0017] Figure 2 for Figure 1 Side view of the overall structure;

[0018] Figure 3 for Figure 1 Enlarged view of the structure of region A in the middle;

[0019] Figure 4 for Figure 3 Schematic diagram of the overall structure after cross-section of the middle box structure;

[0020] Figure 5 for Figure 2 Enlarged view of the structure of region B in the middle;

[0021] The following are the labeling elements in the figure:

[0022] 1. First base; 2. Second base; 3. Third base; 4. First conveyor belt; 5. Second conveyor belt; 6. First slide rail; 61. First sliding member; 62. Second slide rail; 63. Second sliding member; 64. Vertical slide rail; 7. Connecting rod; 71. First rack; 72. Second rack; 73. Gear; 74. Rotating shaft; 75. Cleaning slide rail; 76. Cleaning brush; 77. Connecting plate; 8. Box body; 81. Blower box; 82. Imaging assembly; 83. Inspection station; 84. Suction cup. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] like Figures 1-4 As shown, this application provides a backlight module visual inspection device, including a first base 1, which is a support part of the backlight module visual inspection device and provides a stable support for subsequent backlight module visual inspection. A second base 2 and a third base 3 are respectively provided on both sides of the first base 1, which are also support parts of the backlight module visual inspection device.

[0026] A first conveyor belt 4 is fixedly installed on the third base 3. At least two sets of conveyor tracks are provided on the first conveyor belt 4, and multiple sets of backlight modules are placed on each set of conveyor tracks, which are mainly used to transport the backlight modules to be tested.

[0027] A second conveyor belt 5 is fixedly installed on the second base 2. The second conveyor belt 5 is only equipped with one set of conveying tracks, which are mainly used to transport the backlight module that has completed the pre-inspection. The second conveyor belt 5 is also equipped with a camera shooting component and other visual inspection components to perform secondary inspection on the backlight module during the transport process, thereby completing the visual inspection of the backlight module.

[0028] A worktable is set on the first base 1, and a pre-inspection component is set on the worktable. The pre-inspection component is mainly used to pre-inspect the backlight module. It is located between the first conveyor belt 4 and the second conveyor belt 5. The first conveyor belt 4 temporarily stores and transports the backlight module. The pre-inspection component clamps and inspects the backlight module and then transports it to the second conveyor belt 5. The second conveyor belt 5 completes the subsequent visual inspection of the backlight module.

[0029] The pre-detection component includes a first slide rail 6 fixedly installed on both sides of the workbench. The first slide rail 6 is set in the same direction as the first conveyor belt 4 and the second conveyor belt 5. A first sliding member 61 is slidably installed on the first slide rail 6. The first sliding member 61 is adapted to slide along the first slide rail 6 under the drive of an external force.

[0030] A second slide rail 62 is fixedly installed on the first slide member 61. The second slide rail 62 is arranged along the vertical direction of the first slide rail 6. A second slide member 63 is slidably installed on the second slide rail 62. The second slide member 63 is adapted to slide along the second slide rail 62 under the drive of an external force.

[0031] A vertical slide rail 64 is fixedly installed on one side of the second sliding member 63. The vertical slide rail 64 is set in a vertical direction. A third sliding member is slidably installed on one side of the vertical slide rail 64. A box body 8 is fixedly installed on one side of the third sliding member. The third sliding member is adapted to slide along the setting direction of the vertical slide rail 64 under the drive of external force.

[0032] It should be noted that in this application, a driving device (not shown in the figure) is provided on the workbench. The first sliding member 61, the second sliding member 63 and the third sliding member are all driven by the driving device. The driving device can be a motor screw structure of the prior art. When performing visual inspection of the backlight module, the first sliding member 61, the second sliding member 63 and the third sliding member move in the same position and direction each time. Therefore, the movement process can be pre-programmed by electronic control without manual intervention. At the same time, a PLC control system is provided in the first base 1. The PLC control system is electrically connected to the driving device to facilitate the control of the opening and closing of each electrical component.

[0033] by Figure 1 Taking the perspective as an example, when the first slider 61 moves, the box 8 can be adjusted to be close to the first conveyor belt 4 or close to the second conveyor belt 5. When the second slider 63 moves, the box 8 can be adjusted in the horizontal direction. When the third slider moves, the vertical height of the box 8 can be adjusted. The position of the box 8 can be adjusted from three different directions.

[0034] like Figures 3-5 As shown, a blower box 81 is fixedly installed inside the box 8. At least two sets of suction cups 84 are fixedly installed at the bottom of the blower box 81. A blower pipe is opened in the middle of the suction cup 84 and is connected to the blower box 81. When the blower box 81 is opened, the blower pipe sucks air upward, and the suction cup 84 has suction force. When the blower box 81 is closed, the blower pipe no longer has suction force, and the object sucked on the suction cup 84 falls freely. At the same time, a detection station 83 is fixed on the workbench by bolts. Two sets of detection slots are opened on the detection station 83. The backlight module is placed in the detection slot for pre-detection. At the same time, an imaging component 82 is also fixedly installed on one side inside the box 8. The imaging component 82 is existing technology and is mainly used for pre-detection of the backlight module.

[0035] In this application, the blower box 81 and suction cup 84 are mainly used to pick up and put down the backlight module to be inspected. During the visual inspection process, the PLC control system controls the external drive device to start, which drives the first sliding member 61 to slide and adjust the box 8 onto the first conveyor belt 4. Then the blower box 81 is turned on and blows air upward. The suction cup 84 has suction force and picks up and clamps the backlight module on the first conveyor belt 4. During this process, the height of the box 8 can be adjusted by controlling the external drive device to move the third sliding member, thereby adjusting the height of the suction cup 84.

[0036] After the suction cup 84 picks up the backlight module, the external drive device is controlled to start and drive the first sliding member 61 to move, moving the suction cup 84 to the top of the inspection station 83. Then the blower box 81 is turned off, and the backlight module picked up by the suction cup 84 falls into the inspection slot. Then the imaging component 82 performs pre-inspection on the backlight module.

[0037] After the pre-inspection is completed, the PLC control system controls the blower box 81 to open, pick up the backlight module, and then controls the first sliding member 61 to slide towards the position of the second conveyor belt 5, bringing the suction cup 84 onto the second conveyor belt 5. The blower box 81 is then closed, and the backlight module falls onto the second conveyor belt 5 for transportation and subsequent visual inspection. The pre-inspection of the backlight module is then completed.

[0038] During the above process, suction cup 84 will inevitably accumulate dust after prolonged use, thus requiring cleaning. Figures 2-5 As shown, a connecting rod 7 is fixedly installed at the bottom of the second slide rail 62, and a first rack 71 is fixedly installed at the bottom of the connecting rod 7. A gear 73 is meshed on one side of the first rack 71, and a rotating shaft 74 is rotatably connected to the center of the gear 73 through a bearing. The bottom of the rotating shaft 74 is rotatably connected to the worktable surface through a bearing. When the second slide rail 62 moves under the drive of the first sliding member 61, the first rack 71 moves synchronously, driving the gear 73 to rotate.

[0039] A second rack 72 meshes with the gear 73 on the other side. A connecting plate 77 is fixedly installed at the bottom of the second rack 72, and a cleaning brush 76 is fixedly installed at the other end of the connecting plate 77. It should be noted that the top of the cleaning brush 76 is adapted to contact the bottom of the suction cup 84. At the same time, a cleaning slide rail 75 is fixedly installed on the worktable. The cleaning slide rail 75 is fixedly connected to the cleaning brush 76. The movement trajectory of the cleaning brush 76 can be further limited by the cleaning slide rail 75. When the gear 73 rotates, the second rack 72 moves under the drive of the gear 73. At this time, the movement direction of the second rack 72 is opposite to the movement direction of the first rack 71, and the movement of the second rack 72 will drive the cleaning brush 76 to move synchronously.

[0040] During the visual inspection of the backlight module, the PLC control system starts the drive device, which moves the second sliding member 63 to adjust the box 8 to the same horizontal position as the cleaning brush 76. Then, the drive device corresponding to the first sliding member 61 is started, which moves the box 8 toward the position of the first conveyor belt 4. During the movement, the second slide rail 62 moves the first rack 71, the first rack 71 rotates the gear 73, the gear 73 rotates and moves the second rack 72, the second rack 72 moves the connecting plate 77, the connecting plate 77 moves the cleaning brush 76, and the cleaning brush 76 slides on the cleaning slide rail 75.

[0041] When the box 8 slides toward the position of the first conveyor belt 4 under the drive of the first sliding member 61, since the second rack 72 moves in the opposite direction, the cleaning brush 76 and the suction cup 84 move in opposite directions. During the movement, the top of the cleaning brush 76 contacts the bottom of the suction cup 84, and the cleaning brush 76 cleans the dust on the suction cup 84.

[0042] Furthermore, to ensure the cleaning effect of the cleaning brush 76, the cleaning brush 76 is made of flexible material and has a high arrangement density, thereby increasing the contact surface with the suction cup 84 and cleaning the suction cup 84 better. It should be noted that the PLC control system will only start the drive device to move the second sliding member 63 to move the box 8 to a position where it is at the same level as the cleaning brush 76 when the suction cup 84 needs to be cleaned. During normal operation, there is no need to control the movement of the second sliding member 63. At this time, the suction cup 84 and the cleaning brush 76 are not at the same level, which will not affect the normal operation of the suction cup 84.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for visual inspection of a backlight module, characterized in that: include: A first base (1) is provided with a work surface; Inspection station (83), which is fixed to the workbench by bolts, and the inspection station (83) is provided with two sets of inspection slots; A pre-detection component is disposed on the workbench surface. The pre-detection component includes a first slide rail (6) fixedly installed on both sides of the workbench surface. A first sliding member (61) is slidably installed on the first slide rail (6). The second slide rail (62) is fixedly installed on the first sliding member (61), and the second sliding member (63) is slidably installed on the second slide rail (62). A vertical slide rail (64) is fixedly installed on one side of the second sliding member (63), and a third sliding member is fixedly installed on one side of the vertical slide rail (64); Box (8), which is fixedly installed on one side of the third sliding member, blower box (81) is fixedly installed inside the box (8), at least two sets of suction cups (84) are fixedly installed at the bottom of the blower box (81), and an imaging component (82) is also fixedly installed on one side inside the box (8). A connecting rod (7) is fixedly installed at the bottom of the second slide rail (62). A first rack (71) is fixedly installed at the bottom of the connecting rod (7). A gear (73) meshes with one side of the first rack (71), and a second rack (72) meshes with one side of the gear (73). A cleaning brush (76) is provided on the workbench. A connecting plate (77) is fixedly installed on one side of the cleaning brush (76), and the other end of the connecting plate (77) is fixedly connected to the second rack (72). 2.The visual inspection device of a backlight module according to claim 1, wherein: A cleaning slide rail (75) is fixedly installed on the workbench, and the cleaning slide rail (75) is slidably connected to the bottom of the cleaning brush (76). 3.The visual inspection device of a backlight module according to claim 2, wherein: The gear (73) is rotatably connected to a shaft (74) at its center via a bearing, and the bottom of the shaft (74) is rotatably connected to the worktable via a bearing.

4. The visual inspection apparatus for backlight module according to claim 3, wherein: The first base (1) is equipped with a PLC control system, and the workbench is equipped with a drive device, which is electrically connected to the PLC control system.

5. The visual inspection apparatus of claim 4, wherein: A second base (2) is provided on one side of the first base (1), and a second conveyor belt (5) is fixedly installed on the second base (2).

6. The visual inspection apparatus of claim 5, wherein: A third base (3) is provided on the other side of the first base (1), and a first conveyor belt (4) is fixedly installed on the third base (3). At least two sets of conveying tracks are provided on the first conveyor belt (4).

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