LED display screen detection equipment and detection method thereof

Abstract

The invention discloses LED display screen detection equipment and a detection method thereof, and relates to the technical field of digital television testing instruments.The LED display screen detection equipment comprises a frame, the side wall of the frame is fixedly connected with a control box, the lower end in the frame is rotationally connected with a lead screw, the other end of the lead screw is fixedly connected with a handle, and the inner side wall of the frame is rotationally connected with a one-way bearing; an inner ring of the one-way bearing is fixedly connected with the gear, and an outer ring of the one-way bearing is fixedly connected with the lead screw. A telescopic rod is fixedly connected to the bottom in the frame, a contact plate is fixedly connected to the top of the telescopic rod, a rack is fixedly connected to the bottom of the contact plate, a sliding plate drives a first electric push rod to move downwards, so that the telescopic end of the first electric push rod makes extrusion contact with the top of the contact plate, and a lead screw drives a limiting plate and an LED display screen detector to move on the X-axis by a small distance. The LED display screen detector can move to the next detection area of the display screen, automatic cycle detection is achieved, it is ensured that each area of the display screen can be accurately detected, and omission is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of digital television testing instruments, in particular to a LED display screen testing device and a testing method thereof. Background Art

[0002] The patent with publication (announcement) number CN221323773U discloses a 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 direction and a mounting platform that can slide along the X-axis direction. The LED display screen detector and the mounting platform are connected by a reciprocating moving device, and the reciprocating moving device includes a driving mechanism and a transmission mechanism.

[0003] In the above-mentioned prior art, the installation platform is controlled to move along the X-axis direction by setting a linear motor guide rail and a linear motor slider, and the cylinder is driven to rotate by the motor. Because the slider is slidably connected inside the spiral slide groove and the linear slide groove at the same time, when the cylinder starts to rotate, the slider is pushed to move back and forth along the Z-axis direction inside the linear slide groove, and the slide plate and the LED display screen detector are driven to move back and forth in the Z-axis direction; when the display screen is detected, the Z-axis and X-axis movements of the LED display screen detector are controlled separately, and when the LED display screen detector moves to the bottom of the display screen, it is necessary to control the linear motor guide rail and the linear motor slider to control the installation platform to move along the X-axis direction, adjust the position of the LED display screen detector, and increase the difficulty of operation. Summary of the invention

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

[0005] The present invention is achieved in this way: an LED display screen detection device and a detection method thereof are constructed, the device comprises a frame, a control box is fixedly connected to the side wall of the frame, a screw is rotatably connected to the lower end inside the frame, the other end of the screw is fixedly connected to the handle, a one-way bearing is rotatably connected to the inner side wall of the frame, the inner ring of the one-way bearing is fixedly connected to the gear, and the outer ring of the one-way bearing is fixedly connected to the screw; a telescopic rod is fixedly connected to the bottom of the frame, a contact plate is fixedly connected to the top of the telescopic rod, a rack is fixedly connected to the bottom of the contact plate, the rack is meshed with the gear, the side wall of the screw is threadedly connected to the lower end of the limiting plate, a reciprocating screw is rotatably connected inside the limiting plate, the bottom of the reciprocating screw is fixedly connected to the output shaft of the motor, the side wall of the limiting plate is fixedly connected to a sliding rod, the sliding rod is slidably connected to the inner side wall of the sliding plate, a sliding block is rotatably connected to the sliding plate, and the sliding block is slidably connected to the sliding groove on the reciprocating screw; an LED display screen detector is fixedly connected to the sliding plate.

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

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

[0008] Preferably, a third electric push rod is bolted to the side wall of the outer cylinder, and a 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 wall of the cross frame, a belt pulley is rotatably connected to the sliding column, and four groups of sliding columns and belt pulleys are provided, which are respectively arranged at the four corner areas of the cross frame.

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

[0011] Preferably, the space inside the outer cylinder is communicated with the interior of the vertical rod.

[0012] A method for detecting an LED display screen comprises the following steps:

[0013] S1: When testing the LED display screen, the LED display screen is placed between two sets of squeezing plates, and the squeezing plates are driven by the first electric push rod to move and squeeze and fix the display screen;

[0014] S2: Pre-twist the handle to drive the screw to rotate, and the screw drives the limiting plate to move to the edge, then turn on the motor, the motor applies power to drive the reciprocating screw to rotate, the reciprocating screw drives the sliding plate and the LED display detector to move up and down on 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, when the LED display detector completes a round trip, the sliding plate drives the first electric push rod to move downward, so that the telescopic end of the first electric push rod is pressed and contacted with the top of the contact plate, and then the contact plate drives the rack to move downward, the rack meshes and drives the gear to rotate, the gear applies torque to drive the screw to rotate, the screw drives the limiting plate to move a small distance, and the limiting plate drives the LED display detector to move to another area of ​​the display, and the cycle continues;

[0015] S3: Turn on the servo motor to drive the sliding column to rotate, the sliding column drives the transmission belt to rotate, the transmission belt drives the other three sets of pulleys to rotate, the transmission belt drives the color difference detector to move along the front end of the display screen shell, and the color difference detector is used to detect the display screen shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The sliding plate drives the first electric push rod to move downward, so that the telescopic end of the first electric push rod is squeezed and contacted with the top of the contact plate. The screw drives the limiting plate and the LED display screen detector to move a small distance on the X-axis. The LED display screen detector can move to the next detection area of ​​the display screen to realize automatic cycle detection, ensuring that every area of ​​the display screen can be accurately detected to avoid 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 limiting plate and the LED display screen detector on the X-axis is controlled by the rack indirectly driving the limiting plate and the LED display screen detector through the screw rod when the first electric push rod contacts the contact plate once.

[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 on 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, and then adjusting the position of the sliding column and the conveyor belt, it can adapt to display screen shells of different sizes and shapes, thereby improving the flexibility and accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0027] Among them: frame-1, control box-2, screw-3, handle-4, gear-5, telescopic rod-6, rack-7, contact plate-8, limit plate-9, reciprocating screw-10, motor-11, slide rod-12, slide plate-13, LED display screen detector-14, first electric push rod-15, slide block-16, first electric push rod-17, extrusion plate-18, vertical rod-19, cross frame-20, outer cylinder-21, inner cylinder-22, third electric push rod-23, transmission belt-24, color difference detector-25, servo motor-26, sliding column-27, pulley-28. DETAILED DESCRIPTION

[0028] The following will be combined with the attached Figure 1-Figure 6 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are made clear. The complete description is obvious. The described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. 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 those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

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

[0032] Specifically, a telescopic rod 6 is fixedly connected to the bottom of the frame 1, and the telescopic rod 6 is composed of an inner frame, an outer frame and a spring. The inner frame slides in the outer frame, and 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, and a rack 7 is fixedly connected to the bottom of the contact plate 8. The rack 7 is meshed with the gear 5. The side wall of the screw rod 3 is threadedly connected to the lower end of the limiting plate 9. A reciprocating screw rod 10 is rotatably connected to the limiting plate 9, and the bottom of the reciprocating screw rod 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, and the sliding rod 12 is slidably connected to the inner wall of the sliding plate 13. A sliding block 16 is rotatably connected to the sliding plate 13, and the sliding block 16 is slidably connected to the sliding groove on the reciprocating screw rod 10; an LED display screen detector 14 is fixedly connected to the sliding plate 13.

[0033] Specifically, the side wall of the frame 1 is bolted to a first electric push rod 17, the telescopic end of the first electric push rod 17 is fixedly connected to the extrusion plate 18, the bottom of the frame 1 is fixedly connected to a vertical rod 19, the top of the vertical rod 19 is fixedly connected to a cross frame 20, the surface of the cross frame 20 is bolted to an outer cylinder 21, the inner cylinder 21 is slidably connected to an inner cylinder 22, the side wall of the outer cylinder 21 is bolted to a third electric push rod 23, the telescopic end of the third electric push rod 23 is fixedly connected to the inner cylinder 22, the inner side wall of the cross frame 20 is slidably connected to a sliding column 27, the sliding column 27 is rotatably connected to a pulley 28, the pulley 28 is transmission-connected to a 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; four groups of sliding columns 27 and pulleys 28 are provided, which are respectively arranged at the four corners of the cross frame 20.

[0034] Specifically, the space inside the outer cylinder 21 is communicated with the interior of the vertical rod 19 .

[0035] Specifically, when testing the LED display screen, the LED display screen is placed between two sets of extrusion plates 18, and the first electric push rod 17 drives the extrusion plates 18 to move and squeeze and fix the display screen; the stability of the display screen during the testing process is ensured, and the testing error caused by movement or shaking is avoided.

[0036] Specifically, the handle 4 is twisted in advance to drive the screw rod 3 to rotate, and the screw rod 3 drives the limiting plate 9 to move to the edge, and then the motor 11 is turned on. The motor 11 applies power to drive the reciprocating screw rod 10 to rotate. The reciprocating screw rod 10 drives the sliding plate 13 and the LED display screen detector 14 to move up and down on the Y axis through the sliding block 16. The LED display screen detector 14 can traverse the vertical direction of the display screen and perform color difference judgment on each pixel point. The LED display screen detector 14 can detect the pixel points on the LED display screen and perform color difference judgment on the pixel points. When the LED display screen detector 13 completes a 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 is squeezed and contacted with the top of the contact plate 8, and then the contact plate 8 drives the rack 7 to move downward, and the rack 7 engages to drive the gear 5 to rotate. The gear 5 applies torque to drive the screw rod 3 to rotate, and the screw rod 3 drives the limiting plate 9 to move a small distance. The limiting plate 9 also drives the LED display screen detector 13 to move to another area of ​​the display screen, and the cycle is repeated.

[0037] Specifically, the downward movement amount of the rack 7 is controlled by adjusting the overall length of the first electric push rod 15, and the rotation angle of the gear 5 driven by the meshing of the rack 7 is adjusted to control the movement amount 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 shell, and the color difference detector 25 is used to detect the display screen shell.

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

[0040] The above shows and describes the basic principle, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0041] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An LED display screen detection device and a detection method thereof, comprising a frame (1), a control box (2) is fixedly connected to the side wall of the frame (1), a screw rod (3) is rotatably connected to the lower end of the frame (1), the other end of the screw rod (3) is fixedly connected to a handle (4), the inner side wall of the frame (1) is rotatably connected to a one-way bearing, the inner ring of the one-way bearing is fixedly connected to a gear (5), and the outer ring of the one-way bearing is fixedly connected to the screw rod (3); Features: 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 bottom of the contact plate (8), the rack (7) is meshed with the gear (5), the side wall of the screw rod (3) is threadedly connected to the lower end of the limiting plate (9), a reciprocating screw rod (10) is rotatably connected to the limiting plate (9), the bottom of the reciprocating screw rod (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), and the sliding block (16) is slidably connected to the sliding groove on the reciprocating screw rod (10); and an LED display screen detector (14) is fixedly connected to the sliding plate (13).

2. According to claim 1, a LED display screen detection device is characterized in that: A first electric push rod (17) is bolted to the side wall of the frame (1), the telescopic end of the first electric push rod (17) is fixedly connected to the extrusion plate (18), a vertical rod (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 rod (19).

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

4. The LED display screen detection device according to claim 1, characterized in that: A third electric push rod (23) is bolted to the side wall of the outer cylinder (21), and a telescopic end of the third electric push rod (23) is fixedly connected to the inner cylinder (22).

5. The LED display screen detection device according to claim 1, characterized in that: The inner wall of the cross frame (20) is slidably connected with a sliding column (27), and a belt pulley (28) is rotatably connected to the sliding column (27). Four groups of sliding columns (27) and belt pulleys (28) are provided, which are respectively arranged at the four corners of the cross frame (20).

6. The LED display screen detection device according to claim 1, characterized in that: The belt pulley (28) is connected to the transmission belt (24) by transmission. A servo motor (26) is bolted to the sliding column (27). The servo motor (26) is fixedly connected to the center of the belt pulley (28).

7. The LED display screen detection device according to claim 1, characterized in that: The space inside the outer cylinder (21) is communicated with the interior of the vertical rod (19).

8. A method for detecting an LED display screen, using the LED display screen detection device according to claim 7, characterized in that: The method comprises the following steps: S1: When testing the LED display screen, the LED display screen is placed between two groups of squeezing plates (18), and the squeezing plates (18) are driven by the first electric push rod (17) to move and squeeze and fix the display screen; S2: Pre-twist the handle (4) to drive the screw (3) to rotate, the 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 screw (10) to rotate, the reciprocating screw (10) drives the sliding plate (13) and the LED display screen detector (14) to move up and down on the Y axis through the sliding block (16), the LED display screen detector (14) can detect the pixel points on the LED display screen, and judge the color difference of the pixel points. When the LED display screen detector (13 ) 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) is pressed and contacted with the top of the contact plate (8), and 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 a torque to drive the screw (3) to rotate, the screw (3) drives the limiting plate (9) to move a small distance, and the limiting plate (9) drives the LED display screen detector (13) to move to another area of ​​the display screen, and this cycle is repeated; 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 shell of the display screen, and the shell of the display screen is detected by the color difference detector (25).

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