An LED display screen testing device and its testing method

Abstract

This invention discloses an LED display screen testing device and its testing method, relating to the technical field of digital television testing instruments. The device includes a frame, with a control box fixedly connected to the side wall of the frame. A lead screw is rotatably connected to the lower end of the frame, with the other end of the lead screw fixedly connected to a handle. A one-way bearing is rotatably connected to the inner side wall of the frame, with its outer ring fixedly connected to a gear and its inner ring fixedly connected to the lead screw. A telescopic rod is fixedly connected to the bottom of the frame, with a contact plate fixedly connected to the top of the telescopic rod. A rack is fixedly connected to the side of the contact plate. A sliding plate drives a first electric push rod to move downwards, causing the telescopic end of the first electric push rod to press against the top of the contact plate. The lead screw drives a limiting plate and an LED display screen detector to move a small distance along the X-axis. The LED display screen detector can move to the next testing area of ​​the display screen, achieving automatic cyclic testing and ensuring that every area of ​​the display screen is accurately tested, avoiding omissions.

Description

Technical Field

[0001] This invention relates to the field of digital television testing instruments, specifically to an LED display screen testing device and its testing method. Background Technology

[0002] The patent with publication number CN221323773U discloses an LED display screen brightness and color difference detection and correction device, which belongs to the field of LED display screen technology. It includes an LED display screen detector that can slide along the Z-axis and a mounting platform that can slide along the X-axis. The LED display screen detector and the mounting platform are connected by a reciprocating moving device, which includes a driving mechanism and a transmission mechanism.

[0003] In the aforementioned prior art, the mounting platform is controlled to move along the X-axis by a linear motor guide rail and a linear motor slider, and the cylinder is rotated by a motor. Because the slider is simultaneously slidably connected inside the spiral groove and the linear groove, when the cylinder starts to rotate, it pushes the slider to move back and forth along the Z-axis inside the linear groove, and drives the slide plate and the LED display detector to move back and forth along the Z-axis. When detecting the display screen, the movement of the LED display detector along the Z-axis and X-axis is controlled separately. When the LED display detector moves to the bottom of the display screen, the linear motor guide rail and the linear motor slider are controlled to move the mounting platform along the X-axis to adjust the position of the LED display detector, which increases the difficulty of operation. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides an LED display screen testing device and a testing method thereof.

[0005] This invention is implemented as follows: An LED display screen testing device and its testing method are constructed. The device includes a frame, a control box fixedly connected to the side wall of the frame, a lead screw rotatably connected to the lower end of the frame, the other end of the lead screw being fixedly connected to a handle, a one-way bearing rotatably connected to the inner side wall of the frame, the outer ring of the one-way bearing being fixedly connected to a gear, and the inner ring of the one-way bearing being fixedly connected to the lead screw; a telescopic rod fixedly connected to the bottom of the frame, a contact plate fixedly connected to the top of the telescopic rod, a rack fixedly connected to the side of the contact plate, the rack meshing with the gear; a threaded connection between the side wall of the lead screw and the lower end of a limiting plate; a reciprocating lead screw rotatably connected inside the limiting plate, the bottom of the reciprocating lead screw being fixedly connected to the output shaft of a motor; a sliding rod fixedly connected to the side wall of the limiting plate, the sliding rod slidingly connected to the inner side wall of a sliding plate; a sliding block rotatably connected to the sliding plate, the sliding block slidingly connected to a groove on the reciprocating lead screw; and an LED display screen detector fixedly connected to the sliding plate.

[0006] Preferably, a second electric push rod is bolted to the side wall of the frame, the telescopic end of the second electric push rod is fixedly connected to the extrusion plate, a vertical pole is fixedly connected to the bottom of the frame, and a cross frame is fixedly connected to the top of the vertical pole.

[0007] Preferably, the surface of the cross frame is bolted to an outer cylinder, and an inner cylinder is slidably connected inside the outer cylinder.

[0008] Preferably, a third electric push rod is bolted to the side wall of the outer cylinder, and the telescopic end of the third electric push rod is fixedly connected to the inner cylinder.

[0009] Preferably, a sliding column is slidably connected to the inner side wall of the cross frame, and a pulley is rotatably connected to the sliding column. There are four sets of sliding columns and pulleys, which are respectively located in the four corner areas of the cross frame.

[0010] Preferably, the pulley is connected to the transmission belt, and a servo motor is bolted to the sliding column, with the servo motor fixedly connected to the center of the pulley.

[0011] Preferably, the space inside the outer cylinder is connected to the space inside the upright.

[0012] A method for testing an LED display screen includes the following steps;

[0013] S1: When testing an LED display screen, the LED display screen is placed between two sets of extrusion plates, and the extrusion plates are moved by the second electric push rod to extrude and fix the display screen.

[0014] S2: Twist the handle to rotate the lead screw, which moves the limiting plate to the edge. Then turn on the motor, which applies power to rotate the reciprocating lead screw. The reciprocating lead screw moves the sliding plate and the LED display detector up and down along the Y-axis through the sliding block. The LED display detector can detect the pixels on the LED display and judge the color difference of the pixels. After the LED display detector completes one round trip, the sliding plate moves the first electric push rod downward, so that the extension end of the first electric push rod presses against the top of the contact plate. Then the contact plate moves the rack downward, and the rack meshes with the gear to rotate. The gear applies torque to rotate the lead screw, which moves the limiting plate a small distance. The limiting plate and the LED display detector move to another area of ​​the display, and this cycle continues.

[0015] S3: The servo motor is activated to drive the sliding column to rotate, which in turn drives the conveyor belt to rotate. The conveyor belt then drives three other sets of pulleys to rotate, which in turn drives the color difference detector to move along the front end of the display screen's casing. The color difference detector is used to inspect the display screen's casing.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The sliding plate drives the first electric push rod to move downward, so that the extension end of the first electric push rod is pressed against the top of the contact plate. The screw drives the limiting plate and the LED display detector to move a small distance on the X-axis. The LED display detector can move to the next detection area of ​​the display screen to realize automatic cyclic detection, ensuring that every area of ​​the display screen can be accurately detected and avoiding omissions.

[0018] (2) The amount of downward movement of the rack is controlled by adjusting the overall length of the first electric push rod, and the amount of movement of the rack indirectly through the lead screw to the limiting plate and the LED display detector on the X-axis is controlled when the first electric push rod makes a single contact with the contact plate.

[0019] (3) The servo motor drives the sliding column to rotate, and then drives the color difference detector to move along the front end of the display screen shell through the transmission belt. The color difference detector can perform a comprehensive inspection of the display screen shell to ensure that the color difference of the shell meets the quality standards.

[0020] (4) By controlling the third electric push rod to push the air in the outer cylinder into the cross frame, the position of the sliding column and the conveyor belt can be adjusted, which can adapt to display screen shells of different sizes and shapes, and improve the flexibility and accuracy of detection. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure within the framework of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the limiting plate of the present invention;

[0024] Figure 4 This is a schematic diagram of the cross-shaped frame structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the cross frame of the present invention;

[0026] Figure 6 This is a schematic diagram of the limiting plate structure of the present invention.

[0027] The components include: frame-1, control box-2, lead screw-3, handle-4, gear-5, telescopic rod-6, rack-7, contact plate-8, limiting plate-9, reciprocating lead screw-10, motor-11, slide rod-12, sliding plate-13, LED display detector-14, first electric push rod-15, sliding block-16, second electric push rod-17, extrusion plate-18, upright rod-19, cross frame-20, outer cylinder-21, inner cylinder-22, third electric push rod-23, conveyor belt-24, color difference detector-25, servo motor-26, sliding column-27, and pulley-28. Detailed Implementation

[0028] The following will be combined with the appendix Figures 1-6 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly explained. The described embodiments are obviously only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0029] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have an intervening component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or may have an intervening component. When a component is considered to be "set on" another component, it can be directly set on the other component or may have an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figures 1 to 6The present invention discloses an LED display screen testing device and its testing method, comprising a frame 1, a control box 2 fixedly connected to the side wall of the frame 1, a lead screw 3 rotatably connected to the lower end of the frame 1, the other end of the lead screw 3 being fixedly connected to a handle 4, a one-way bearing rotatably connected to the inner side wall of the frame 1, the outer ring of the one-way bearing being fixedly connected to a gear 5, and the inner ring of the one-way bearing being fixedly connected to the lead screw 3; when the contact plate 8 moves downward, the contact plate 8 drives the rack 7 to move downward and mesh with the gear 5 to rotate, the gear 5 drives the outer ring of the one-way bearing to rotate clockwise, the outer ring drives the inner ring of the one-way bearing to rotate, and the inner ring drives the lead screw 3 to rotate; at the same time, when the rack 7 moves upward, the outer ring does not drive the inner ring to rotate, and the lead screw 3 does not rotate.

[0032] Specifically, a telescopic rod 6 is fixedly connected to the bottom of the frame 1. The telescopic rod 6 consists of an inner frame, an outer frame, and a spring. The inner frame slides within the outer frame. The spring is fixedly connected to the bottom of the inner frame. A contact plate 8 is fixedly connected to the top of the telescopic rod 6. A rack 7 is fixedly connected to the side of the contact plate 8. The rack 7 meshes with a gear 5. The side wall of the lead screw 3 is threadedly connected to the lower end of the limiting plate 9. A reciprocating lead screw 10 is rotatably connected inside the limiting plate 9. The bottom of the reciprocating lead screw 10 is fixedly connected to the output shaft of the motor 11. A sliding rod 12 is fixedly connected to the side wall of the limiting plate 9. The sliding rod 12 is slidably connected to the inner side wall of the sliding plate 13. A sliding block 16 is rotatably connected to the sliding plate 13. The sliding block 16 is slidably connected to the groove on the reciprocating lead screw 10. An LED display detector 14 is fixedly connected to the sliding plate 13.

[0033] Specifically, a second electric push rod 17 is bolted to the side wall of frame 1, and the telescopic end of the second electric push rod 17 is fixedly connected to the extrusion plate 18. A vertical pole 19 is fixedly connected to the bottom of the inner frame 1, and a cross frame 20 is fixedly connected to the top of the vertical pole 19. An outer cylinder 21 is bolted to the surface of the cross frame 20, and an inner cylinder 22 is slidably connected inside the outer cylinder 21. A third electric push rod 23 is bolted to the side wall of the outer cylinder 21, and the telescopic end of the third electric push rod 23 is fixedly connected to the inner cylinder 22. A sliding column 27 is slidably connected to the inner side wall of the cross frame 20, and a pulley 28 is rotatably connected to the sliding column 27. The pulley 28 is connected to the transmission belt 24. A servo motor 26 is bolted to the sliding column 27, and the servo motor 26 is fixedly connected to the center of the pulley 28. There are four sets of sliding columns 27 and pulleys 28, which are respectively located in the four corner areas of the cross frame 20.

[0034] Specifically, the space inside the outer cylinder 21 is connected to the space inside the upright 19.

[0035] Specifically, during the testing of the LED display screen, the LED display screen is placed between two sets of extrusion plates 18, and the extrusion plates 18 are moved by the second electric push rod 17 to extrude and fix the display screen; this ensures the stability of the display screen during the testing process and avoids testing errors caused by movement or shaking.

[0036] Specifically, the handle 4 is pre-twisted to rotate the lead screw 3, which in turn moves the limiting plate 9 to the edge. Then, the motor 11 is turned on, and the motor 11 applies power to rotate the reciprocating lead screw 10. The reciprocating lead screw 10 moves the sliding plate 13 and the LED display detector 14 up and down along the Y-axis via the sliding block 16. The LED display detector 14 can traverse the vertical direction of the display screen and perform color difference judgment on each pixel. The LED display detector 14 can detect the pixels on the LED display screen and judge the color difference of the pixels. After the LED display detector 14 completes one round trip, the sliding plate 13 moves the first electric push rod 15 downward, so that the telescopic end of the first electric push rod 15 presses against the top of the contact plate 8. Then, the contact plate 8 moves the rack 7 downward, and the rack 7 meshes with the gear 5 to rotate. The gear 5 applies torque to rotate the lead screw 3, and the lead screw 3 moves the limiting plate 9 a small distance. The limiting plate 9 and the LED display detector 14 move to another area of ​​the display screen, and this cycle continues.

[0037] Specifically, the downward movement of the rack 7 is controlled by adjusting the overall length of the first electric push rod 15, thereby adjusting the rotation angle of the gear 5 driven by the rack 7, and controlling the movement of the limiting plate 9 driven by the lead screw 3.

[0038] Specifically, the servo motor 26 is turned on to drive the sliding column 27 to rotate, the sliding column 27 drives the transmission belt 24 to rotate, the transmission belt 24 drives the other three sets of pulleys 28 to rotate, and the transmission belt 24 drives the color difference detector 25 to move along the front end of the display screen casing. The color difference detector 25 is used to detect the casing of the display screen.

[0039] Specifically, the third electric push rod 23 is controlled to move the inner cylinder 22 inside the outer cylinder 21, pushing the air inside the outer cylinder 21 into the cross frame 20, causing the sliding column 27 inside the cross frame 20 to move, thereby adjusting the position of the conveyor belt 24.

[0040] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An LED display screen testing device, comprising a frame (1), a control box (2) fixedly connected to the side wall of the frame (1), a lead screw (3) rotatably connected to the lower end of the frame (1), the other end of the lead screw (3) being fixedly connected to a handle (4), a one-way bearing rotatably connected to the inner side wall of the frame (1), the outer ring of the one-way bearing being fixedly connected to a gear (5), and the inner ring of the one-way bearing being fixedly connected to the lead screw (3); Its features are: A telescopic rod (6) is fixedly connected to the bottom of the frame (1), a contact plate (8) is fixedly connected to the top of the telescopic rod (6), a rack (7) is fixedly connected to the side of the contact plate (8), the rack (7) meshes with the gear (5), the side wall of the lead screw (3) is threadedly connected to the lower end of the limiting plate (9), a reciprocating lead screw (10) is rotatably connected inside the limiting plate (9), the bottom of the reciprocating lead screw (10) is fixedly connected to the output shaft of the motor (11), a slide rod (12) is fixedly connected to the side wall of the limiting plate (9), the slide rod (12) is slidably connected to the inner side wall of the sliding plate (13), a sliding block (16) is rotatably connected to the sliding plate (13), the sliding block (16) is slidably connected to the groove on the reciprocating lead screw (10); an LED display detector (14) is fixedly connected to the sliding plate (13). A vertical pole (19) is fixedly connected to the bottom of the frame (1), and a cross frame (20) is fixedly connected to the top of the vertical pole (19). A sliding column (27) is slidably connected to the inner side wall of the cross frame (20), and a pulley (28) is rotatably connected to the sliding column (27). The pulley (28) is connected to the transmission belt (24) for transmission, and a servo motor (26) is bolted to the sliding column (27). The servo motor (26) is fixedly connected to the center of the pulley (28). The conveyor belt (24) drives the color difference detector (25) to move along the front end of the display screen casing, and the color difference detector (25) is used to detect the casing of the display screen.

2. The LED display screen testing equipment according to claim 1, characterized in that: The side wall of the frame (1) is bolted with a second electric push rod (17), and the telescopic end of the second electric push rod (17) is fixedly connected to the extrusion plate (18).

3. The LED display screen testing equipment according to claim 1, characterized in that: The surface of the cross frame (20) is bolted to an outer cylinder (21), and an inner cylinder (22) is slidably connected inside the outer cylinder (21).

4. The LED display screen testing equipment according to claim 3, characterized in that: The outer cylinder (21) is bolted to the side wall with a third electric push rod (23), and the telescopic end of the third electric push rod (23) is fixedly connected to the inner cylinder (22).

5. The LED display screen testing equipment according to claim 1, characterized in that: There are four sets of sliding columns (27) and pulleys (28), which are respectively located in the four corner areas of the cross frame (20).

6. The LED display screen testing equipment according to claim 3, characterized in that: The space inside the outer cylinder (21) is connected to the space inside the upright (19).

7. A method for testing an LED display screen, using the LED display screen testing equipment described in claim 2, characterized in that: Includes the following steps; S1: When testing the LED display screen, the LED display screen is placed between two sets of extrusion plates (18), and the extrusion plates (18) are moved by the second electric push rod (17) to extrude and fix the display screen. S2: Twist the handle (4) in advance to drive the lead screw (3) to rotate. The lead screw (3) drives the limiting plate (9) to move to the edge. Then turn on the motor (11). The motor (11) applies power to drive the reciprocating lead screw (10) to rotate. The reciprocating lead screw (10) drives the sliding plate (13) and the LED display detector (14) to move up and down along the Y-axis through the sliding block (16). The LED display detector (14) can detect the pixels on the LED display and judge the color difference of the pixels. When the LED display detector (14) After completing one round trip, the sliding plate (13) drives the first electric push rod (15) to move downward, so that the telescopic end of the first electric push rod (15) presses against the top of the contact plate (8). Then the contact plate (8) drives the rack (7) to move downward. The rack (7) meshes and drives the gear (5) to rotate. The gear (5) applies torque to drive the lead screw (3) to rotate. The lead screw (3) drives the limiting plate (9) to move a small distance. The limiting plate (9) and the LED display detector (14) move to another area of ​​the display screen, and this cycle continues. S3: Turn on the servo motor (26) to drive the sliding column (27) to rotate. The sliding column (27) drives the transmission belt (24) to rotate. The transmission belt (24) drives the other three sets of pulleys (28) to rotate. The transmission belt (24) drives the color difference detector (25) to move along the front end of the display screen shell. The color difference detector (25) is used to detect the shell of the display screen.

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