Indium tin oxide (ITO) circuit defect detection equipment for liquid crystal display screen

Abstract

The utility model discloses liquid crystal display screen ITO circuit defect detection equipment which comprises a machine table, a bearing table used for bearing a liquid crystal display screen is installed on the upper surface of the machine table, and a jacking assembly used for driving the bearing table to ascend is installed in the middle of the upper surface of the machine table. Positioning blocks used for carrying out extrusion positioning on the borne liquid crystal display screen are installed on the four edges of the bearing table, positioning assemblies used for driving the positioning blocks to move are installed between the four edges of the bearing table and the machine table, and a fixing frame is fixedly installed at one end of the machine table; an industrial camera is installed at the position, corresponding to an ITO circuit of the liquid crystal display screen, of one side of the fixing frame, and when the bearing table is driven to ascend through operation of the jacking assembly, the liquid crystal display screen can be moved to the position where the liquid crystal display screen and the industrial camera are focused. Through cooperative operation of the jacking assembly and the positioning assembly, the four positioning blocks are driven to extrude and position the liquid crystal display screen, lifting and positioning operation of the liquid crystal display screen can be achieved at the same time, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display screen defect detection technology, specifically to a liquid crystal display screen ITO circuit defect detection device. Background Technology

[0002] The ITO circuitry in a liquid crystal display (LCD) is the space between the upper and lower glass plates in the liquid crystal cell. The circuitry is formed on the display by etching indium tin oxide (ITO) using an etching technique. When inspecting for defects in the ITO circuitry of an LCD, the LCD is placed under an industrial camera to observe the ITO circuitry.

[0003] The "An ITO Circuit Defect Detection Device for Liquid Crystal Display Screens" with authorization announcement number "CN218788003U" includes a machine base, and an X-axis moving module and an axis moving module are provided on the machine base. The X-axis moving module is connected to an adjusting slide and drives the adjusting slide to move along the X-axis direction. An industrial camera is provided on the adjusting slide and the adjusting slide can drive the industrial camera to move along the Z-axis direction. The axis moving module is connected to an electric rotary table and drives the electric rotary table to move along the Y-axis direction.

[0004] In the aforementioned prior art, during the defect detection of the ITO circuit of the liquid crystal display screen, the liquid crystal display screen to be inspected is directly placed on the electric rotary table without any positioning components. This causes the liquid crystal display screen to move relative to the electric rotary table. At the same time, during the inspection, the industrial camera needs to be moved along the Z-axis by adjusting the slide table for focusing, which is a rather cumbersome operation. Utility Model Content

[0005] The purpose of this invention is to provide a defect detection device for ITO circuits in a liquid crystal display screen to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a defect detection device for ITO circuits in a liquid crystal display screen, comprising a machine base, a support platform for supporting the liquid crystal display screen mounted on the upper surface of the machine base, a lifting component for driving the support platform to rise mounted in the middle of the upper surface of the machine base, positioning blocks for squeezing and positioning the liquid crystal display screen mounted on the four sides of the support platform, positioning components for driving the positioning blocks to move mounted between the four sides of the support platform and the machine base, a fixed frame fixedly mounted at one end of the machine base, and an industrial camera mounted on one side of the fixed frame corresponding to the position of the ITO circuits in the liquid crystal display screen.

[0007] As a further preferred embodiment of this technical solution, the lifting assembly includes a motor, a screw, a threaded sleeve, a limiting rod, and a limiting sleeve. The motor is fixedly installed in the middle of the upper surface of the machine platform, and the screw is fixedly installed at the output end of the motor. The threaded sleeve is fixedly installed in the middle of the lower surface of the support platform, and the threaded sleeve is threadedly connected to the screw. Limiting rods are symmetrically fixedly installed at the bottom of the four sides of the support platform, and limiting sleeves are fixedly installed on the upper surface of the machine platform at positions corresponding to the limiting rods. The limiting sleeves are slidably connected to the limiting rods.

[0008] As a further preferred embodiment of this technical solution, the positioning assembly includes a positioning rod, a movable plate, a positioning hole, and a connecting rod. The positioning rods are symmetrically fixedly installed on the four sides of the support platform. The movable plate is slidably installed between two positioning rods. The movable plate has a positioning hole corresponding to the position of the positioning rod. The positioning hole is slidably connected to the positioning rod. The bottom of the movable plate is rotatably installed with a connecting rod through a pin. The end of the connecting rod away from the movable plate is rotatably connected to the upper surface of the machine platform through a pin. The positioning block is movably installed on one side of the movable plate.

[0009] As a further preferred embodiment of this technical solution, the top of the movable plate is symmetrically provided with movable holes, and movable rods are slidably installed inside the movable holes. The positioning block is fixedly installed at one end of the two movable rods. A buffer spring is sleeved on the outer side of the end of the movable rod away from the positioning block. One end of the buffer spring is fixedly connected to the end of the movable rod away from the positioning block, and the other end of the buffer spring is fixedly connected to the movable plate.

[0010] As a further preferred embodiment of this technical solution, a rubber pad is installed at the end of the positioning block away from the movable rod.

[0011] As a further preferred embodiment of this technical solution, a fixed frame is fixedly installed on the top of the fixed frame, a movable block is slidably installed in the middle of the fixed frame, the industrial camera is fixedly installed at the bottom of the movable block, and a screw moving assembly for driving the movable block to move is installed inside the fixed frame.

[0012] This utility model provides a defect detection device for ITO circuits in liquid crystal displays, which has the following beneficial effects:

[0013] (1) This utility model uses the operation of the lifting component to drive the support platform to rise. At the same time, the connection between the connecting rod and the machine platform will drive the connecting rod to pull the moving plate, which will cause the moving plate to slide between the two positioning rods. The four moving plates will move closer to each other, and the four positioning blocks will squeeze and position the LCD screen to prevent the LCD screen from moving relative to the support platform.

[0014] (2) When the lifting component drives the support platform to rise, the LCD screen can be moved to the position where it is focused with the industrial camera. At the same time, the lifting component and the positioning component work together to drive the four positioning blocks to squeeze and position the LCD screen. The lifting and positioning operations of the LCD screen can be realized at the same time, which is convenient to operate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] In the diagram: 1. Machine base; 2. Support platform; 3. Positioning block; 4. Fixing frame; 5. Industrial camera; 6. Motor; 7. Screw; 8. Threaded sleeve; 9. Limiting rod; 10. Limiting sleeve; 11. Positioning rod; 12. Moving plate; 13. Positioning hole; 14. Connecting rod; 15. Movable hole; 16. Movable rod; 17. Buffer spring; 18. Rubber pad; 19. Fixing frame; 20. Moving block; 21. Screw moving assembly. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] This utility model provides a technical solution: such as Figures 1 to 3 As shown in this embodiment, a liquid crystal display screen ITO circuit defect detection device includes a machine base 1. A support platform 2 for supporting the liquid crystal display screen is installed on the upper surface of the machine base 1. A lifting component for driving the support platform 2 to rise is installed in the middle of the upper surface of the machine base 1. Positioning blocks 3 for squeezing and positioning the liquid crystal display screen are installed on the four sides of the support platform 2. A positioning component for driving the positioning blocks 3 to move is installed between the four sides of the support platform 2 and the machine base 1. A fixing frame 4 is fixedly installed at one end of the machine base 1. An industrial camera 5 is installed on one side of the fixing frame 4 corresponding to the position of the liquid crystal display screen ITO circuit. The liquid crystal display screen is placed on the support platform 2, and the position of the ITO circuit on the liquid crystal display screen is aligned with the industrial camera 5. The lifting component drives the support platform 2 to rise. At the same time, the lifting component and the positioning component work together to drive the four positioning blocks 3 to squeeze and position the liquid crystal display screen.

[0021] like Figures 1 to 3As shown, the lifting assembly includes a motor 6, a screw 7, a threaded sleeve 8, a limiting rod 9, and a limiting sleeve 10. The motor 6 is fixedly installed in the middle of the upper surface of the machine platform 1, and the screw 7 is fixedly installed in the output end of the motor 6. The threaded sleeve 8 is fixedly installed in the middle of the lower surface of the support platform 2, and the threaded sleeve 8 is threadedly connected to the screw 7. The limiting rods 9 are symmetrically fixedly installed on the bottom of the four sides of the support platform 2. The limiting sleeves 10 are fixedly installed on the upper surface of the machine platform 1 at the positions corresponding to the limiting rods 9, and the limiting sleeves 10 are slidably connected to the limiting rods 9.

[0022] The screw 7 is driven to rotate by the motor 6, and the bearing platform 2 will be raised by the threaded connection between the threaded sleeve 8 and the screw 7, as well as the limiting sliding between the limiting sleeve 10 and the limiting rod 9.

[0023] like Figures 1 to 3 As shown, the positioning assembly includes a positioning rod 11, a movable plate 12, a positioning hole 13, and a connecting rod 14. The four sides of the support platform 2 are symmetrically and fixedly equipped with positioning rods 11. The movable plate 12 is slidably installed between two positioning rods 11. The movable plate 12 has a positioning hole 13 at the position corresponding to the positioning rod 11. The positioning hole 13 is slidably connected to the positioning rod 11. The bottom of the movable plate 12 is rotatably installed with a connecting rod 14 through a shaft pin. The end of the connecting rod 14 away from the movable plate 12 is rotatably connected to the upper surface of the machine base 1 through a shaft pin. The positioning block 3 is movably installed on one side of the movable plate 12.

[0024] When the support platform 2 rises, the connection between the moving plate 12 and the machine base 1 via the connecting rod 14 will cause the connecting rod 14 to pull the moving plate 12, which will cause the moving plate 12 to slide between the two positioning rods 11. The four moving plates 12 will move closer to each other, and the four positioning blocks 3 will squeeze and position the LCD screen.

[0025] like Figures 1 to 3 As shown, the top of the movable plate 12 is symmetrically provided with movable holes 15, and movable rods 16 are slidably installed inside the movable holes 15. The positioning block 3 is fixedly installed at one end of the two movable rods 16. A buffer spring 17 is sleeved on the outer side of the end of the movable rod 16 away from the positioning block 3. One end of the buffer spring 17 is fixedly connected to the end of the movable rod 16 away from the positioning block 3, and the other end of the buffer spring 17 is fixedly connected to the movable plate 12.

[0026] When the four positioning blocks 3 press and position the LCD screen, the reaction force of the LCD screen on the positioning blocks 3 will drive the movable rod 16 to slide inside the movable hole 15. The reverse pull of the positioning blocks 3 by the buffer spring 17 will buffer the force of the positioning blocks 3 pressing the LCD screen, thus protecting the LCD screen.

[0027] like Figures 1 to 3As shown, a rubber pad 18 is installed at the end of the positioning block 3 away from the movable rod 16.

[0028] The rubber pad 18 is used to protect the position where the positioning block 3 presses against the LCD screen, preventing the LCD screen from breaking due to the pressure of the positioning block 3.

[0029] like Figures 1 to 3 As shown, a fixed frame 19 is fixedly installed on the top of the fixed frame 4, and a movable block 20 is slidably installed in the middle of the fixed frame 19. The industrial camera 5 is fixedly installed at the bottom of the movable block 20, and a screw moving assembly 21 for driving the movable block 20 to move is installed inside the fixed frame 19.

[0030] The industrial camera 5 can be moved by the screw moving assembly 21, which can perform overall inspection of the entire ITO circuit on the LCD screen.

[0031] This utility model provides a defect detection device for ITO circuits in a liquid crystal display screen, and its working principle is as follows:

[0032] When the device is in use, the LCD screen is placed on the support platform 2, and the ITO line position on the LCD screen is aligned with the industrial camera 5. The motor 6 drives the screw 7 to rotate. The threaded connection between the threaded sleeve 8 and the screw 7, and the limiting sliding between the limiting sleeve 10 and the limiting rod 9 will drive the support platform 2 to rise. At the same time, the connection between the connecting rod 14 and the moving plate 12 and the machine base 1 will drive the connecting rod 14 to pull the moving plate 12, which will cause the moving plate 12 to slide between the two positioning rods 11. The four moving plates 12 will move closer to each other, and the four positioning blocks 3 will squeeze and position the LCD screen.

[0033] When the four positioning blocks 3 press and position the LCD screen, the reaction force of the LCD screen on the positioning blocks 3 will drive the movable rod 16 to slide inside the movable hole 15. The reverse pull of the positioning blocks 3 by the buffer spring 17 will buffer the force of the positioning blocks 3 pressing the LCD screen, thus protecting the LCD screen.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A defect detection device for ITO circuits in a liquid crystal display screen, comprising a machine base (1), characterized in that: The upper surface of the machine (1) is equipped with a support platform (2) for carrying the liquid crystal display screen. A lifting component for driving the support platform (2) to rise is installed in the middle of the upper surface of the machine (1). Positioning blocks (3) for squeezing and positioning the liquid crystal display screen are installed on the four sides of the support platform (2). Positioning components for driving the positioning blocks (3) to move are installed between the four sides of the support platform (2) and the machine (1). A fixing frame (4) is fixedly installed at one end of the machine (1). An industrial camera (5) is installed on one side of the fixing frame (4) corresponding to the position of the liquid crystal display screen ITO line.

2. The liquid crystal display screen ITO circuit defect detection device according to claim 1, characterized in that: The lifting assembly includes a motor (6), a screw (7), a threaded sleeve (8), a limiting rod (9), and a limiting sleeve (10). The motor (6) is fixedly installed in the middle of the upper surface of the machine platform (1). The screw (7) is fixedly installed at the output end of the motor (6). The threaded sleeve (8) is fixedly installed in the middle of the lower surface of the support platform (2). The threaded sleeve (8) is threadedly connected to the screw (7). The limiting rods (9) are symmetrically fixedly installed at the bottom of the four sides of the support platform (2). The limiting sleeves (10) are fixedly installed on the upper surface of the machine platform (1) at the position corresponding to the limiting rods (9). The limiting sleeves (10) are slidably connected to the limiting rods (9).

3. The liquid crystal display screen ITO circuit defect detection device according to claim 2, characterized in that: The positioning assembly includes a positioning rod (11), a movable plate (12), a positioning hole (13), and a connecting rod (14). The four sides of the support platform (2) are symmetrically fixedly equipped with positioning rods (11). A movable plate (12) is slidably installed between the two positioning rods (11). The movable plate (12) has a positioning hole (13) at the position corresponding to the positioning rod (11). The positioning hole (13) is slidably connected to the positioning rod (11). A connecting rod (14) is rotatably installed at the bottom of the movable plate (12) through a shaft pin. The end of the connecting rod (14) away from the movable plate (12) is rotatably connected to the upper surface of the machine base (1) through a shaft pin. The positioning block (3) is movably installed on one side of the movable plate (12).

4. The liquid crystal display screen ITO circuit defect detection device according to claim 3, characterized in that: The top of the movable plate (12) is symmetrically provided with movable holes (15), and movable rods (16) are slidably installed inside the movable holes (15). The positioning block (3) is fixedly installed at one end of the two movable rods (16). A buffer spring (17) is sleeved on the outer side of the end of the movable rod (16) away from the positioning block (3). One end of the buffer spring (17) is fixedly connected to the end of the movable rod (16) away from the positioning block (3), and the other end of the buffer spring (17) is fixedly connected to the movable plate (12).

5. The liquid crystal display screen ITO circuit defect detection device according to claim 4, characterized in that: A rubber pad (18) is installed at the end of the positioning block (3) away from the movable rod (16).

6. The liquid crystal display screen ITO circuit defect detection device according to claim 1, characterized in that: A fixed frame (19) is fixedly installed on the top of the fixed frame (4), and a movable block (20) is slidably installed in the middle of the fixed frame (19). The industrial camera (5) is fixedly installed on the bottom of the movable block (20), and a screw moving assembly (21) for driving the movable block (20) to move is installed inside the fixed frame (19).

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