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CN-122016854-A - Device and method for rapidly detecting defects of LED display screen

CN122016854ACN 122016854 ACN122016854 ACN 122016854ACN-122016854-A

Abstract

The invention belongs to the field of display screen detection, in particular to a device and a method for rapidly detecting defects of an LED display screen, comprising a detection table, wherein a marked visual detection assembly is arranged on the detection table; the marking type visual detection assembly comprises a first cross beam fixedly connected to two sides of the upper end face of the detection table, a second cross beam is connected between the first cross beams in a sliding mode, a sliding block is connected to one side of the second cross beam in a sliding mode, two first guide rods are connected to the sliding block in a sliding mode, a detection camera is fixedly connected to one lower end of each guide rod, and a marking pen is arranged on one side of the detection camera. The invention utilizes the marking type visual detection assembly, and when a defect is detected, a marker pen is used for marking at the corresponding position of the screen, and then a maintenance person can determine the position of the defect by observing the mark during subsequent maintenance.

Inventors

  • ZHANG JIANMING
  • Duan Erxuan
  • HU YONGJIE
  • ZHANG GUANGCHAO

Assignees

  • 山西三晋视界科技有限公司

Dates

Publication Date
20260512
Application Date
20260309

Claims (10)

  1. 1. The rapid defect detection device for the LED display screen comprises a detection table (1) and is characterized in that a marked visual detection assembly is arranged on the detection table (1); The marking type visual detection assembly comprises a first cross beam (2) fixedly connected to two sides of the upper end face of a detection table (1), a second cross beam (5) is connected between the first cross beams (2) in a sliding mode, a sliding block (36) is connected to one side of the second cross beam (5) in a sliding mode, two first guide rods (35) are connected to the sliding block (36) in a sliding mode, a detection camera (37) is fixedly connected to the lower end of each first guide rod (35), and a marking pen (38) is arranged on one side of each detection camera (37); The device also comprises a mark auxiliary protection component; The mark auxiliary protection assembly comprises a roller (4) which is rotatably arranged on one side of the upper end face of a detection table (1), a film (25) is wound on the roller (4), a fixing frame (28) is fixedly connected to one side of the upper end face of the detection table (1), two guide rods (44) are connected to the fixing frame (28) in a sliding mode, blades (18) are fixedly connected to the upper ends of the guide rods (44) together, a support column (3) is fixedly connected to one side of the upper end face of the detection table (1), a rack (22) is connected to the upper end of the support column (3) in a sliding mode, a transverse moving plate (23) is fixedly connected to one end of the rack (22), and two finger cylinders (24) are fixedly connected to one side of the transverse moving plate (23).
  2. 2. The LED display screen defect rapid detection device according to claim 1, wherein one end of the beam II (5) is in threaded connection with a threaded rod I (29), two ends of the threaded rod I (29) are all rotationally arranged on the beam I (2), one end of the beam I (2) is fixedly connected with a motor V (30), the output end of the motor V (30) is fixedly connected with one end of the threaded rod I (29), one end of the sliding block (36) is in threaded connection with a threaded rod II (32), two ends of the threaded rod II (32) are all rotationally arranged on the beam II (5), one side of the beam II (5) is fixedly connected with a motor V (33), the output end of the motor V (33) is fixedly connected with one end of the threaded rod II (32), one side of the sliding block (36) is fixedly connected with a cylinder II (34), and the piston end of the cylinder II (34) is fixedly connected with one side of the detection camera (37).
  3. 3. The LED display screen defect rapid detection device according to claim 1, wherein a motor four (26) is fixedly connected to one side of the upper end of the detection table (1), the output end of the motor four (26) is fixedly connected with one end of the roller (4), two support rods (27) are fixedly connected to one side of the detection table (1), a slide column (41) is fixedly connected to the upper ends of the support rods (27), a compression roller (39) is fixedly connected to the two slide columns (41) in a sliding mode, a support roller (40) is fixedly connected between the two support rods (27) in a sliding mode, a spring (42) is sleeved on one side of the slide column (41), one end of the spring (42) is fixedly connected with one end of the compression roller (39), and the other end of the spring is fixedly connected with the end of the slide column (41).
  4. 4. The rapid detection device for defects of an LED display screen according to claim 1, wherein a third cylinder (43) is fixedly connected to one side of the fixing frame (28), and the piston end of the third cylinder (43) is fixedly connected with one side of the bottom of the blade (18).
  5. 5. The rapid detection device for defects of an LED display screen according to claim 1, wherein a gear (21) is rotatably arranged on one side of the upper end of the support column (3), the gear (21) is meshed with a rack (22), a motor III (20) is fixedly connected to one side of the upper end of the support column (3), and the output end of the motor III (20) is fixedly connected with the gear (21).
  6. 6. The rapid detection device for defects of an LED display screen according to claim 1, further comprising a display screen positioning component; The display screen positioning assembly comprises two positioning plates (14), the two positioning plates (14) are symmetrically arranged on two sides of the upper end face of the detection table (1) in a sliding mode, a two-way threaded rod (16) is rotatably arranged on one side of the upper end face of the detection table (1), two sides of the two-way threaded rod (16) are respectively connected with threads of the two positioning plates (14), a motor (15) is fixedly connected on one side of the upper end face of the detection table (1), and the output end of the motor (15) is fixedly connected with one end of the two-way threaded rod (16).
  7. 7. The rapid detection device for defects of an LED display screen according to claim 1, further comprising a reinforcing auxiliary component; The reinforcing auxiliary assembly comprises a supporting plate (6) fixedly connected to one side of the upper end face of the detection table (1), a lifting plate (8) is slidably connected to one side of the supporting plate (6), two hard pipes (12) are slidably connected to one side of the lifting plate (8), a plurality of air inlets (31) are formed in the lower side of each hard pipe (12) along the transverse direction at equal intervals, sucking discs (19) are arranged at the air inlets (31), electrostatic generation rods (17) are arranged on two sides of the upper end face of the detection table (1), and an electric heating plate (13) is arranged on one side of the outer wall of each hard pipe (12).
  8. 8. The rapid detection device for defects of an LED display screen according to claim 7, wherein a first bidirectional threaded rod (9) is rotatably arranged at two ends of one side of the lifting plate (8), two sides of the first bidirectional threaded rod (9) are respectively connected with end threads of two hard pipes (12), one end of the lifting plate (8) is fixedly connected with a first motor (10), and the output end of the first motor (10) is fixedly connected with one end of the first bidirectional threaded rod (9).
  9. 9. The rapid detection device for defects of an LED display screen according to claim 7, wherein one side of the supporting plate (6) is fixedly connected with a first cylinder (7), a piston end of the first cylinder (7) is fixedly connected with one side of the bottom of the lifting plate (8), one side of the lifting plate (8) is fixedly connected with an air pump (11), an air inlet end of the air pump (11) is communicated with a hose (45), and pipe openings at two sides of the hose (45) are respectively communicated with hard pipes (12) at two sides.
  10. 10. A method for rapidly detecting defects of an LED display screen, characterized in that the detection is performed by using the detection device according to any one of claims 1 to 9, comprising the following steps: S1, firstly, placing an LED display screen between two positioning plates (14), enabling the two positioning plates (14) to be close to each other, clamping the LED display screen, then, lighting the LED display screen, then, starting a detection camera (37), shooting the LED display screen by using the detection camera (37), uploading a shot picture to an image analysis system, and adjusting the position of the detection camera (37), so that the shooting range is enlarged, and shooting all positions on the surface of the LED display screen is ensured; S2, when the defect on the screen is detected, the position of the sliding block (36) can be adjusted to enable the pen point of the marking pen (38) to be aligned with the defect position, then the marking pen (38) is lowered to enable the pen point of the marking pen (38) to be in contact with the defect position of the screen, a mark can be left at the defect position, then the operation is repeated, and each time one defect is detected, the marking is carried out by using the marking pen (38); S3, the defect position can be recorded firstly in the detection process, after the full detection of an LED display screen is finished, the rack (22) is transversely moved on the support column (3), the end part of the film (25) in the initial state is positioned between the press roller (39) and the support roller (40), the end part of the film (25) is pressed by the press roller (39) under the action of the spring (42), therefore, when the rack (22) transversely moves to a proper position, the edge of the end part of the film (25) is positioned at the clamping ends of two finger cylinders (24), then the end part of the film (25) is clamped by the finger cylinders (24), then the finger cylinders (24) are reset rightwards, meanwhile, the film (25) is unreeled until the unreeled part of the film (25) covers the upper part of the LED display screen, at the moment, the marker (38) is aligned with the defect position of the screen, the marker (38) is driven to descend, the surface of the film (25) can be marked, after all the markers are finished on the surface of the film (25), the knife blade (18) is lifted, one side of the film (25) can be cut off, and then the film (25) can be cut off and covered with the LED display screen together; S4, winding the film (25) by driving the roller (4) to rotate again, so that the broken end of the film (25) is reset between the pressing roller (39) and the supporting roller (40) for subsequent re-taking; S5, after marking is completed on the surface of the film (25) by the marking pen (38), enabling the sucker (19) to be attached to the surface of the film (25), enabling the film (25) to be adsorbed on the sucker (19) in a negative pressure adsorption mode, enabling the finger cylinder (24) to loosen the film (25), enabling the blade (18) to cut off the film (25), enabling the cut-off film (25) to descend again, enabling the electrostatic generating rods (17) on two sides to enable the surface of the film (25) to be electrified, enabling the surface of the film (25) to generate adsorption force, enabling the edge of the film (25) to be attached to a screen frame after the film (25) is attached to the surface of an LED display screen, enabling the sucker (19) to loosen the film (25), enabling the electric heating plate (13) to be electrified and enabling the electric heating plate (13) to be aligned to the screen frame, enabling the two electric heating plates (13) to be close to the two side frames of the screen simultaneously until the electric heating plate (13) is enabled to enable the edge of the film (25) to descend, enabling the film (25) to be attached to the side frames to be more firmly attached to the screen frame due to heat change.

Description

Device and method for rapidly detecting defects of LED display screen Technical Field The invention belongs to the field of display screen detection, and particularly relates to a device and a method for rapidly detecting defects of an LED display screen. Background The LED display screen is a novel imaging electronic device which is made of light emitting diodes which are arranged in sequence. Due to the characteristics of high brightness, wide visual angle, long service life and the like, the light-emitting diode is widely applied to products such as outdoor advertising screens and the like. In the production and processing process of the LED display screen, gray black point defects are generated after the screen is lightened due to improper installation or faults of structures such as a circuit and an optical film, and in order to prevent the defective LED display screen from flowing into subsequent use, the defect detection is required to be carried out on the LED display screen. The patent with the bulletin number of CN214121967U discloses a dust removing optical device for detecting surface defects of a liquid crystal display screen, which relates to the field of display screen detection and comprises a placing table, an LED lamp, a supporting frame and a liquid crystal display screen, wherein the supporting frame is fixedly arranged at the upper end of the placing table, the CCD camera is placed to the support frame upper end, places the equal fixed mounting in platform both sides and has LED lamp, and is adjacent place the LCD screen between the LED lamp, place bench side one side and install the power supply unit who provides electric power for the LCD screen. This patent is through setting up and placing platform, LED lamp, support frame, CCD camera and power supply unit, at first lights the screen to the CCD can shoot defect and the dust of screen then close the screen, and the CCD can only shoot the last of dust on the screen, through combining the result of above-mentioned two steps, we can get rid of the dust accurately, judge the position of defect, solved the technical problem that current detection can appear the false detection. However, the above technical solution has the following disadvantages in the practical application process: When the defect detection is carried out on the LED display screen, the LED display screen is firstly lightened, then the CCD camera is utilized to shoot the LED display screen, and the shot picture is uploaded to the image analysis system, so that whether the screen has the defect is detected, and when the defect exists on the screen, the maintenance is needed. However, in general, batch inspection is performed on the LED display screens, and after the inspection is finished, the LED display screens with defects are repaired uniformly. In the repairing process, as the number of the LED display screens is large, a maintainer is difficult to accurately remember the defect position of each LED display screen, so that the maintenance efficiency is affected. In addition, even if the fault position is recorded by means of a mobile phone, a computer or paper, repeated searching and checking are needed during repairing, which is troublesome and is easy to be confused. Disclosure of Invention In order to overcome the defects of the prior art and solve at least one technical problem in the background art, the invention provides a device and a method for rapidly detecting defects of an LED display screen. The technical scheme adopted for solving the technical problems is that the rapid defect detection equipment for the LED display screen comprises a detection table, wherein a marked visual detection component is arranged on the detection table; The marking type visual detection assembly comprises a first cross beam fixedly connected to two sides of the upper end surface of the detection table, a second cross beam is connected between the first cross beams in a sliding manner, a sliding block is connected to one side of the second cross beam in a sliding manner, two first guide rods are connected to the sliding block in a sliding manner, a detection camera is fixedly connected to the lower ends of the first guide rods, and a marking pen is arranged on one side of the detection camera; The device also comprises a mark auxiliary protection component; The auxiliary protection component for marking comprises a roller which is arranged on one side of the upper end face of the detection table in a rotating mode, a film is wound on the roller, a fixing frame is fixedly connected to one side of the upper end face of the detection table, two guide rods are connected to the fixing frame in a sliding mode, a blade is fixedly connected to the two upper ends of the guide rods in a common mode, a support column is fixedly connected to one side of the upper end face of the detection table, a rack is connected to the upper end of the support column in a sliding mode, a transverse movi