Backlight detection jig for liquid crystal screen

Abstract

The utility model relates to liquid crystal screen backlight production technical field, and disclose a kind of liquid crystal screen backlight detection fixture, including detection table, the detection table top is fixedly connected with support, the support inner chamber top is fixedly connected with camera, the support one side is fixedly connected with transmission motor, the transmission motor output end is fixedly connected with threaded rod, the threaded rod surface is connected with threaded sleeve in screw thread, the threaded sleeve one side is fixedly connected with moving frame, the moving frame one side bottom is fixedly connected with drive motor.The utility model is through the setting of electrostatic adsorption roller, can be driven under transmission motor along screen surface movement, and accurate adsorption dust and particulate matter, and through the setting of air outlet, electrostatic adsorption roller surface can be self-cleaning, ensure that screen surface is clean before detection, effectively eliminate the brightness distortion or misjudgment defect caused by dust interference, significantly improve detection accuracy and yield determination reliability.

Description

Technical Field

[0001] This utility model relates to the field of LCD screen backlight production technology, and in particular to an LCD screen backlight testing fixture. Background Technology

[0002] LCD backlight testing fixture is a specialized tool used to test the performance of LCD backlight modules. Its main function is to quickly and accurately evaluate the backlight's brightness uniformity, color temperature consistency, and the presence of defects such as dark spots or light leakage by simulating actual working conditions. At the same time, it can also test whether the backlight's driving circuit is working properly, ensuring that the brightness and color performance of the display screen meet quality standards. It is widely used in LCD screen production, repair, and quality control to improve testing efficiency and product yield.

[0003] Existing LCD screen backlight testing fixtures still have some problems during use. For example, when testing LCD screen backlight, it is impossible to pre-clean the LCD screen backlight and surface. This not only leads to distortion in the measurement of backlight brightness and uniformity, but may also be misjudged as display defects (such as dark spots or bright spots), which seriously affects the accuracy of testing and the determination of product yield.

[0004] To address these issues, we provide a liquid crystal display backlight testing fixture. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage of not being able to pre-clean the backlight of the LCD screen, which affects the accuracy of the detection. To this end, we propose an LCD screen backlight detection fixture.

[0006] To achieve the above objectives, this application adopts the following technical solution: a liquid crystal screen backlight testing fixture, comprising a testing platform, a bracket fixedly connected to the top of the testing platform, a camera fixedly connected to the top of the inner cavity of the bracket, a drive motor fixedly connected to one side of the bracket, a threaded rod fixedly connected to the output end of the drive motor, a threaded sleeve threadedly connected to the surface of the threaded rod, a movable frame fixedly connected to one side of the threaded sleeve, a drive motor fixedly connected to the bottom of one side of the movable frame, a drive rod fixedly connected to the output end of the drive motor, an electrostatic adsorption roller fixedly connected to the surface of the drive rod, and a transmission gear fixedly connected to one side of the surface of the drive rod. A driven gear is engaged at the top. A rotating rod is fixedly connected to one side of the driven gear. A first pulley is fixedly connected to one side of the rotating rod. An air outlet is provided on one side of the surface of the electrostatic adsorption roller. A connecting pipe is connected to one side of the air outlet. A blower box is fixedly connected to one end of the connecting pipe. A rotating rod is rotatably connected inside the blower box. A second pulley is fixedly connected to one side of the rotating rod. A circular plate is fixedly connected to one end of the rotating rod. A sliding rod is fixedly connected to the top of one side of the circular plate. A movable plate is provided on one side of the circular plate. A connecting plate is fixedly connected to the bottom of the movable plate. A piston plate is fixedly connected to the bottom of the connecting plate. An air suction pipe is connected to one side of the blower box.

[0007] Preferably, a first one-way valve is provided on the surface of the connecting pipe, and a second one-way valve is provided on the surface of the suction pipe.

[0008] Preferably, a support frame is fixedly connected to one side of the top of the testing platform, and both ends of the rotating rod are rotatably connected to one side of the inner wall of the support frame through rotating shafts.

[0009] Preferably, a through groove is provided on one side of the top of the detection table, which is used to collect impurities on the surface of the electrostatic adsorption roller.

[0010] Preferably, a collection box is slidably connected inside the detection platform, and a handle is fixedly connected to one side of the collection box.

[0011] Preferably, the movable plate has a sliding groove inside, and the slide rod is slidably connected inside the sliding groove.

[0012] Preferably, a guide rod is fixedly connected to one side of the inner cavity of the bracket, and a sliding sleeve is slidably connected to the surface of the guide rod, with one side of the sliding sleeve fixedly connected to one side of the movable frame.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model, through the setting of the electrostatic adsorption roller, can move along the screen surface under the drive of the transmission motor and accurately adsorb dust and particulate matter. Furthermore, through the setting of the air blowing port, the surface of the electrostatic adsorption roller can be self-cleaned, avoiding secondary pollution and ensuring that the screen surface is clean before testing. This effectively eliminates brightness distortion or misjudgment defects caused by dust interference, and significantly improves the accuracy of testing and the reliability of yield determination.

[0015] 2. This utility model, through the setting of guide rods and sliding sleeves, can ensure the smooth operation of the moving frame and ensure the stability of the cleaning and testing process. Through the setting of collection box and through groove, it can automatically recover pollutants, keep the working environment clean, significantly shorten the interval between cleaning and testing in traditional testing, reduce the need for manual intervention, and ensure the accuracy of test results. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a perspective view of a liquid crystal screen backlight testing fixture.

[0018] Figure 2 This is a schematic diagram of the internal structure of a bracket in a liquid crystal screen backlight testing fixture.

[0019] Figure 3 This is a schematic diagram of the electrostatic adsorption roller in a liquid crystal screen backlight testing fixture.

[0020] Figure 4 This is a schematic diagram of the transmission gear and driven gear in a liquid crystal screen backlight testing fixture.

[0021] Figure 5 This is a schematic diagram of the internal structure of the blower box in a liquid crystal screen backlight testing fixture.

[0022] Legend: 1. Testing table; 2. Support; 3. Camera; 4. Drive motor; 5. Threaded rod; 6. Threaded sleeve; 7. Moving frame; 8. Drive motor; 9. Drive rod; 10. Electrostatic adsorption roller; 11. Transmission gear; 12. Driven gear; 13. Rotating rod; 14. First pulley; 15. Air outlet; 16. Connecting pipe; 17. Air box; 18. Rotating rod; 19. Second pulley; 20. Circular plate; 21. Slide rod; 22. Movable plate; 23. Connecting plate; 24. Piston plate; 25. Suction pipe; 26. First one-way valve; 27. Second one-way valve; 28. Support frame; 29. ​​Through groove; 30. Collection box; 31. Sliding groove; 32. Guide rod; 33. Sliding sleeve. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Example 1

[0025] Please see Figures 1-5 This utility model is a fixture for testing LCD screen backlights, including a testing platform 1. The top of the testing platform 1 has a placement slot for convenient placement of the LCD screen backlight. A bracket 2 is fixedly connected to the top of the testing platform 1. A camera 3 is fixedly connected to the top of the inner cavity of the bracket 2. The camera 3 can record in real time during the testing of the LCD screen backlight and surface defects, displaying the results on an external display screen. A drive motor 4 is fixedly connected to one side of the bracket 2. A threaded rod 5 is fixedly connected to the output end of the drive motor 4. One end of the threaded rod 5 is fixedly connected to the output end of the drive motor 4, and the other end is rotatably connected to one side of the inner wall of the bracket 2 via a rotating shaft. A threaded sleeve 6 is threadedly connected to the surface of the threaded rod 5. A movable frame 7 is fixedly connected to one side of the threaded sleeve 6. A drive motor 8 is fixedly connected to the bottom of one side of the movable frame 7. The drive motor 8 can drive an electrostatic adsorption roller 10 to rotate via a drive rod 9, thereby adsorbing dust from the surface of the LCD screen backlight. A drive rod 9 is fixedly connected to the output end of the drive motor 8. An electrostatic adsorption roller 10 is fixedly connected to the surface of the drive rod 9. A transmission gear 11 is fixedly connected, and a driven gear 12 meshes with the top of the transmission gear 11. A rotating rod 13 is fixedly connected to one side of the driven gear 12, and a first pulley 14 is fixedly connected to one side of the rotating rod 13. An air outlet 15 is provided on one side of the surface of the electrostatic adsorption roller 10, and a connecting pipe 16 is connected to one side of the air outlet 15. A blower box 17 is fixedly connected to one end of the connecting pipe 16, and a rotating rod 18 is rotatably connected inside the blower box 17. A second pulley 19 is fixedly connected to one side of the surface of the rotating rod 18. The first pulley 14 and the second pulley 19... All pulleys 19 are connected by belt drive. One end of the rotating rod 18 is fixedly connected to a circular plate 20. A sliding rod 21 is fixedly connected to the top of one side of the circular plate 20. A movable plate 22 is provided on one side of the circular plate 20. A connecting plate 23 is fixedly connected to the bottom of the movable plate 22. A piston plate 24 is fixedly connected to the bottom of the connecting plate 23. The piston plate 24 can draw outside air into the blower box 17 and blow it onto the surface of the electrostatic adsorption roller 10 through the air outlet 15, thereby automatically cleaning it. A suction pipe 25 is connected to one side of the blower box 17.

[0026] Example 2

[0027] Please see Figures 1-5Based on Embodiment 1, a first one-way valve 26 is provided on the surface of the connecting pipe 16, and a second one-way valve 27 is provided on the surface of the suction pipe 25. The first one-way valve 26 and the second one-way valve 27 can control the airflow direction, thereby achieving the purpose of reciprocating piston. A support frame 28 is fixedly connected to one side of the top of the detection platform 1. The two ends of the rotating rod 13 are respectively rotatably connected to one side of the inner wall of the support 2 through rotating shafts. A through groove 29 is opened on one side of the top of the detection platform 1. The through groove 29 is used to collect impurities on the surface of the electrostatic adsorption roller 10. The detection platform 1 is slidably connected to the inside. The collection box 30 has a handle fixedly connected to one side. The collection box 30 can collect dust on the surface of the electrostatic adsorption roller 10, which facilitates subsequent unified treatment. The movable plate 22 has a sliding groove 31 inside. The slide rod 21 is slidably connected to the inside of the sliding groove 31. The guide rod 32 is fixedly connected to one side of the inner cavity of the bracket 2. The slide sleeve 33 is slidably connected to the surface of the guide rod 32. One side of the slide sleeve 33 is fixedly connected to one side of the movable frame 7. The guide rod 32 and the slide sleeve 33 can limit the threaded sleeve 6 to ensure that it can move normally laterally.

[0028] Working principle: When the backlight of the LCD screen needs to be pre-processed, the user first places the backlight board of the LCD screen to be tested in the placement slot of the test stage 1 and fixes it. Then, the external controller starts the drive motor 4, which drives the threaded rod 5 to rotate, so that the threaded sleeve 6 moves horizontally along the guide rod 32, thereby driving the moving frame 7 and the electrostatic adsorption roller 10 to cover the screen surface.

[0029] Simultaneously, the drive motor 8 drives the electrostatic adsorption roller 10 to rotate via the drive rod 9. The electrostatic adsorption force on its surface can precisely capture dust and particles on the screen. Meanwhile, the transmission gear 11 drives the rotating rod 13 to rotate via the driven gear 12. The rotating rod 13 drives the first pulley 14 to rotate, which in turn drives the second pulley 19 via a belt. The second pulley 19 drives the rotating rod 18 to rotate, which in turn drives the circular plate 20 to rotate. The circular plate 20 then drives the sliding rod 21 to reciprocate within the sliding groove 31 of the movable plate 22. The connecting plate 23 is pushed to move, which in turn pushes the piston plate 24 to move. When the piston plate 24 moves upward, the second one-way valve 27 opens and the first one-way valve 26 closes, allowing external air to enter the housing through the suction pipe 25. When the piston plate 24 is pressed down, the first one-way valve 26 opens and the second one-way valve 27 closes, allowing the airflow to be ejected from the air outlet 15 through the connecting pipe 16. This provides real-time self-cleaning of the surface of the electrostatic adsorption roller 10, while the removed impurities fall into the collection box 30 through the through groove 29, ensuring accurate and reliable subsequent test results.

[0030] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A fixture for detecting backlight of a liquid crystal display screen, characterized in that, The system includes a testing platform (1), a bracket (2) fixedly connected to the top of the testing platform (1), a camera (3) fixedly connected to the top of the inner cavity of the bracket (2), a drive motor (4) fixedly connected to one side of the bracket (2), a threaded rod (5) fixedly connected to the output end of the drive motor (4), a threaded sleeve (6) threadedly connected to the surface of the threaded rod (5), a movable frame (7) fixedly connected to one side of the threaded sleeve (6), a drive motor (8) fixedly connected to the bottom of one side of the movable frame (7), a drive rod (9) fixedly connected to the output end of the drive motor (8), an electrostatic adsorption roller (10) fixedly connected to the surface of the drive rod (9), a drive gear (11) fixedly connected to one side of the surface of the drive rod (9), a driven gear (12) meshing with the top of the drive gear (11), and a rotating rod (13) fixedly connected to one side of the driven gear (12). A first pulley (14) is fixedly connected to one side of the rotating rod (13). An air blowing port (15) is provided on one side of the surface of the electrostatic adsorption roller (10). A connecting pipe (16) is connected to one side of the air blowing port (15). A blower box (17) is fixedly connected to one end of the connecting pipe (16). A rotating rod (18) is rotatably connected inside the blower box (17). A second pulley (19) is fixedly connected to one side of the rotating rod (18). A circular plate (20) is fixedly connected to one end of the rotating rod (18). A sliding rod (21) is fixedly connected to the top of one side of the circular plate (20). A movable plate (22) is provided on one side of the circular plate (20). A connecting plate (23) is fixedly connected to the bottom of the movable plate (22). A piston plate (24) is fixedly connected to the bottom of the connecting plate (23). An air suction pipe (25) is connected to one side of the blower box (17).

2. The LCD screen backlight detection fixture according to claim 1, characterized in that: The surface of the connecting pipe (16) is provided with a first one-way valve (26), and the surface of the suction pipe (25) is provided with a second one-way valve (27).

3. The LCD screen backlight detection fixture according to claim 1, characterized in that: The top side of the testing platform (1) is fixedly connected to a support frame (28), and the two ends of the rotating rod (13) are rotatably connected to one side of the inner wall of the support (2) through rotating shafts.

4. The LCD screen backlight detection fixture according to claim 1, characterized in that: The top side of the testing station (1) is provided with a through groove (29), which is used to collect impurities on the surface of the electrostatic adsorption roller (10).

5. The LCD backlight testing fixture according to claim 1, characterized in that: The detection station (1) has a collection box (30) slidably connected inside, and a handle is fixedly connected to one side of the collection box (30).

6. The LCD backlight testing fixture according to claim 1, characterized in that: The movable plate (22) has a sliding groove (31) inside, and the slide rod (21) is slidably connected inside the sliding groove (31).

7. The LCD screen backlight detection fixture according to claim 1, characterized in that: A guide rod (32) is fixedly connected to one side of the inner cavity of the bracket (2), and a sliding sleeve (33) is slidably connected to the surface of the guide rod (32). One side of the sliding sleeve (33) is fixedly connected to one side of the movable frame (7).

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