Liquid crystal display screen quality detection device

Abstract

The utility model discloses a quality detection device for a liquid crystal display screen. The quality detection device comprises a workbench, a test board and a copper bar pressing mechanism, a test board placing area is arranged on the workbench and is used for placing the test board; the top surface of the test board is provided with a display screen placing area and a copper bar placing area. Wherein the copper bar placing area is conductive and can be used for placing a copper bar connected with a display screen to be tested; the copper bar pressing mechanism comprises an upper die holder, a lower die holder and a rotary handle; a rotating groove is formed in the middle of the upper die base. The lower die base ascends and descends along the stand column. A pressing plate is arranged on the lower die holder; an insulating flexible material protruding out of the bottom surface is embedded in the bottom of the pressing plate; the rotating handle is rotationally mounted in the rotating groove through a rotating shaft; a roller is embedded in the bottom face of the rotary handle and provided with a containing face and a pressing face, and the roller extends out of the containing face and the pressing face. For display screen copper bars of the same specification and thickness, display screen pressing with the set pressing stroke can be achieved only by rotating the rotating handle, operation is convenient, the pressing force is consistent, detection is reliable, and cost is low.

Description

Technical Field

[0001] The utility model relates to the field of display screen quality detection, in particular to a liquid crystal display screen quality detection device. Background Art

[0002] As an output medium for image information, display screens provide people with many entertainment and work conveniences. Nowadays, display screens can be seen in almost all homes and workplaces, such as mobile phones, televisions, computers, etc. They are around us every day. Basically, every electronic device needs to use a display screen, so a large number of display screens are produced each year. When the production quantity is large or the equipment is damaged and the display screen quality needs to be tested, it is necessary to have a convenient display screen quality detection device.

[0003] Patent application CN112461510A discloses a quality inspection device for a liquid crystal display backlight module, which mainly proposes a solution to the problem of low efficiency of manual lighting inspection of existing liquid crystal display backlight modules, reduces the workload of workers, and improves the accuracy and efficiency of inspection; Patent application CN115791836A discloses a display inspection device and a display inspection method, which solve the problem of inconvenience in quickly inspecting defects of a display, and the problem of a relatively single inspection angle during the inspection of the display, which may cause the defective points of the display to be missed; Patent application CN211043866U discloses a liquid crystal display inspection device, which mainly utilizes a mounting plate and a spring to fix the display, can adapt to the inspection of display screens of different sizes and thicknesses, and can adjust the angle of the inspection table to adapt to operators of different heights.

[0004] The existing LCD screen detection device usually comes with a copper bar. The current power-on detection method for the screen is usually that the inspector wears insulating gloves, places the copper bar in the conductive area and presses it to perform power-on performance detection. This detection method has low detection efficiency and cannot maximize the work efficiency of workers. Moreover, since each inspector has different pressing forces, if the pressing force is small, misjudgment will occur; if the pressing force is large, the copper bar may be damaged, resulting in defective products. In addition, the existing automated detection equipment has a complex structure, is difficult to produce and process, has high costs, and is inconvenient to operate, which increases the cost of detection and is not suitable for mass production and promotion. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a liquid crystal display screen quality detection device in view of the deficiencies of the above-mentioned prior art. The liquid crystal display screen quality detection device can realize the pressing of the display screen with a set pressing stroke by only turning the knob for the display screen copper bars of the same specification and thickness, and has convenient operation, consistent pressing force, reliable detection and low cost. Furthermore, it can also adapt to the detection of display screen copper bars of different thickness specifications.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A liquid crystal display screen quality detection device comprises a workbench, a test board and a copper bar pressing mechanism.

[0008] A test board placement area is provided on the workbench for placing the test board.

[0009] The top surface of the test board is provided with a display screen placement area and a copper busbar placement area; wherein the display screen placement area can be used to place the display screen to be tested; the copper busbar placement area is conductive and can be used to place the copper busbar connected to the display screen to be tested.

[0010] The copper bar pressing mechanism comprises an upper die base, a lower die base and a rotary handle.

[0011] The upper die seat is located above the copper bar placement area and is installed on a workbench outside the copper bar placement area through a column. A rotating groove is arranged in the middle of the upper die seat.

[0012] The lower die seat is located between the upper die seat and the copper bar placement area, and is sleeved on the column and can be lifted up and down along the column; a spring is sleeved on the column located below the lower die seat.

[0013] A pressing plate located just above the copper bar placement area is arranged on the lower die seat; an insulating flexible material protruding from the bottom surface is embedded at the bottom of the pressing plate.

[0014] The rotary handle is rotatably installed in the rotating groove of the upper die seat through the rotating shaft.

[0015] A roller is embedded in the bottom surface of the rotary handle; the rotary handle has a receiving surface and a pressing surface, and the roller extends from the receiving surface and the pressing surface respectively.

[0016] The distance from the center of the shaft to the outer edge of the roller on the receiving surface is L1, the distance from the center of the shaft to the outer edge of the roller on the pressing surface is L2, and the height of the upper die seat is H, then L1≤H, L2>H.

[0017] The maximum pressing displacement of the lower die seat is Δ, then Δ=L2-H.

[0018] The rotating shaft is detachably connected to the rotating slot.

[0019] A pressing groove is arranged at the bottom of the pressing plate, and an insulating flexible material is embedded in the pressing groove.

[0020] The insulating flexible material is silicone or rubber.

[0021] The pressing plate is detachably connected to the end surface of the lower die seat.

[0022] The rotating groove of the upper mold base has a vertical gear position of the handle and a horizontal gear position of the handle; when the handle is in the vertical gear position, the outer roller edge of the storage surface of the handle contacts the top surface of the lower mold base; when the handle is in the horizontal gear position, the outer roller edge of the pressing surface of the handle contacts the top surface of the lower mold base.

[0023] The vertical gear position of the handle and the horizontal gear position of the handle are both provided with locking pins in place.

[0024] The workbench is provided with function buttons, including a power switch, a test button and a power indicator light.

[0025] The copper busbar placement area is connected to the power supply stored in the workbench through a built-in connecting cable.

[0026] The utility model has the following beneficial effects:

[0027] 1. This application is for display copper bars of the same specification and thickness. Only by turning the knob can the display screen be pressed with a set pressing stroke. It is easy to operate, has consistent pressing force, and reliable detection. It can be used by operators with different technical levels and proficiency.

[0028] 2. This application has strong versatility. For display copper bars of different specifications and thicknesses, it is only necessary to replace the rotary handle and adjust the distance L2 from the center of the shaft to the edge of the roller outside the pressing surface.

[0029] 3. The pressing plate of the present application presses the copper bar of the display screen through the pressing plate during the detection process of the liquid crystal display screen, thereby preventing the relative movement of the display screen during the detection process from causing poor contact of the display screen and poor detection effect, thereby improving the working efficiency of the detection device and ensuring the correctness of the detection results and the stability of the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The utility model shows a structural schematic diagram of a liquid crystal display screen quality detection device when the handle is vertically retracted.

[0031] Figure 2 The utility model shows a structural schematic diagram of a liquid crystal display screen quality detection device when the rotary handle is pressed horizontally.

[0032] Figure 3 The schematic diagram of the structure of the rotating handle in the utility model is shown.

[0033] Figure 4 The schematic diagram of the structure of the upper die seat in the utility model is shown.

[0034] Figure 5 The schematic diagram of the structure of the lower die base in the utility model is shown.

[0035] Figure 6 The exploded structural diagram of the copper bar pressing mechanism in the utility model is shown.

[0036] Figure 7 The cross-sectional schematic diagram of the pressing plate embedded with insulating sealing material in the utility model is shown.

[0037] Among them are:

[0038] 10. Workbench; 11. Test board placement area; 12. Power switch; 13. Test button; 14. Power indicator light; 15. Connection cable;

[0039] 20. Test board; 21. Display screen placement area; 22. Copper busbar placement area;

[0040] 30. Copper busbar pressing mechanism;

[0041] 31. Upper mold base; 311. Column; 312. Rotation slot; 313. Column bolt;

[0042] 32. Lower die base; 321. Pressing plate; 322. Extrusion groove; 323. Insulating sealing material; 324. Spring; 325. Pressing plate bolt;

[0043] 33. Rotating handle; 331. Rotating shaft; 332. Roller; 333. Storage surface; 334. Pressing surface;

[0044] 40. Display screen; 41. Copper busbar. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0046] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0047] like Figure 1 and Figure 2As shown, a liquid crystal display screen quality inspection device includes a workbench 10, a test board 20 and a copper bar pressing mechanism 30.

[0048] The workbench is provided with a test board placement area 11 and function keys.

[0049] The test board placement area is used to place the test board.

[0050] The function keys include a power switch 12, a test key 13 and a power indicator light 14. The test key 13 is mainly used for font display detection in the horizontal and vertical screens of the display screen.

[0051] The top surface of the test board is provided with a display screen placement area 21 and a copper busbar placement area 22; wherein the display screen placement area can be used to place the display screen to be tested; the copper busbar placement area is conductive, preferably connected to a power supply stored in the workbench through a built-in connecting cable 15, and can be used to place a copper busbar 41 connected to the display screen 40 to be tested. The copper busbar is usually provided by the display screen, and for some display screens without their own copper busbars, they can be tested by means of external copper busbars.

[0052] like Figures 2 to 6 As shown, the copper bar pressing mechanism includes an upper die base 31 , a lower die base 32 and a rotary handle 33 .

[0053] The upper die seat is located above the copper bar placement area and is installed on a workbench outside the copper bar placement area through a column 311. A rotation groove 312 is provided in the middle of the upper die seat. In this embodiment, the upper die seat is preferably threadedly connected to the column through a column bolt 313.

[0054] The lower die seat is located between the upper die seat and the copper bar placement area, and is sleeved on the column, and can be lifted up and down along the column; a spring 324 is sleeved on the column located below the lower die seat.

[0055] The lower die base is preferably detachably connected to a pressing plate 321 located just above the copper busbar placement area through a pressing plate bolt 325, and an insulating flexible material 323 (also called a pressure strip) protruding from the bottom surface is embedded at the bottom of the pressing plate. In this embodiment, a pressing groove 322 is provided at the bottom of the pressing plate, and an insulating flexible material such as silicone or rubber is embedded in the pressing groove. The provision of the insulating flexible material can prevent the copper busbar from being damaged by pressing while ensuring the reliability of the power-on test.

[0056] The above-mentioned rotary handle is installed in the rotating groove of the upper mold base through the rotating shaft 331.

[0057] Furthermore, the rotating groove of the upper mold base has a vertical gear position of the handle and a horizontal gear position of the handle; when the handle is in the vertical gear position, the outer roller edge of the storage surface of the handle contacts the top surface of the lower mold base; when the handle is in the horizontal gear position, the outer roller edge of the pressing surface of the handle contacts the top surface of the lower mold base.

[0058] Furthermore, both the vertical gear position and the horizontal gear position of the handle are provided with locking pins, so that the pressing stroke control of the pressing plate is simpler and more accurate, and the operation is more convenient.

[0059] A roller 332 is embedded in the bottom surface of the handle, which has a receiving surface and a pressing surface, and the roller extends from the receiving surface and the pressing surface respectively.

[0060] The above-mentioned handle is preferably L-shaped, the storage surface is also the bottom end of the L-shape, the pressing surface is also the end surface of the short leg of the L-shape, and the long leg of the L-shape is the pressing handle.

[0061] The distance from the center of the rotating shaft to the outer edge of the roller of the storage surface is L1, the distance from the center of the rotating shaft to the outer edge of the roller of the pressing surface is L2, and the height of the upper mold seat is H, then L1≤H, L2>H.

[0062] The maximum pressing displacement of the lower die seat is Δ, then Δ=L2-H.

[0063] In this embodiment, the rotating shaft is preferably detachably connected to the rotating slot. In this way, by disassembling the rotating shaft and replacing the handle with different L2 values, it can adapt to the detection of copper bars of different specifications and thicknesses, and has strong versatility.

[0064] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A liquid crystal display screen quality detection device, characterized in that: It includes a workbench, a test board and a copper busbar pressing mechanism; A test board placement area is provided on the workbench for placing the test board; The top surface of the test board is provided with a display screen placement area and a copper busbar placement area; wherein the display screen placement area can be used to place the display screen to be tested; the copper busbar placement area is conductive and can be used to place the copper busbar connected to the display screen to be tested; The copper bar pressing mechanism includes an upper die base, a lower die base and a rotary handle; The upper die seat is located above the copper bar placement area and is installed on a workbench outside the copper bar placement area through a column. A rotating groove is provided in the middle of the upper die seat; The lower die seat is located between the upper die seat and the copper bar placement area, and is sleeved on the column, and can be lifted up and down along the column; a spring is sleeved on the column located below the lower die seat; The lower die base is provided with a pressing plate located just above the copper bar placement area; the bottom of the pressing plate is embedded with an insulating flexible material protruding from the bottom surface; The rotary handle is rotatably installed in the rotating groove of the upper die seat through the rotating shaft; A roller is embedded in the bottom surface of the rotary handle; the rotary handle has a receiving surface and a pressing surface, and the roller extends from the receiving surface and the pressing surface respectively; The distance from the center of the shaft to the outer edge of the roller on the receiving surface is L1, the distance from the center of the shaft to the outer edge of the roller on the pressing surface is L2, and the height of the upper die seat is H, then L1≤H, L2>H.

2. The liquid crystal display screen quality detection device according to claim 1, characterized in that: The maximum pressing displacement of the lower die seat is Δ, then Δ=L2-H.

3. The liquid crystal display screen quality detection device according to claim 1, characterized in that: The rotating shaft is detachably connected to the rotating slot.

4. The liquid crystal display screen quality detection device according to claim 1, characterized in that: A pressing groove is arranged at the bottom of the pressing plate, and an insulating flexible material is embedded in the pressing groove.

5. The liquid crystal display screen quality detection device according to claim 1 or 4, characterized in that: The insulating flexible material is silicone or rubber.

6. The liquid crystal display screen quality inspection device according to claim 1, characterized in that: The pressing plate is detachably connected to the end surface of the lower die seat.

7. The liquid crystal display screen quality detection device according to claim 1, characterized in that: The rotating groove of the upper mold base has a vertical gear position of the handle and a horizontal gear position of the handle; when the handle is in the vertical gear position, the outer roller edge of the storage surface of the handle contacts the top surface of the lower mold base; when the handle is in the horizontal gear position, the outer roller edge of the pressing surface of the handle contacts the top surface of the lower mold base.

8. The liquid crystal display screen quality inspection device according to claim 1, characterized in that: The vertical gear position of the handle and the horizontal gear position of the handle are both provided with locking pins in place.

9. The liquid crystal display screen quality inspection device according to claim 1, characterized in that: The workbench is provided with function buttons, including a power switch, a test button and a power indicator light.

10. The liquid crystal display screen quality inspection device according to claim 1, characterized in that: The copper busbar placement area is connected to the power supply stored in the workbench through a built-in connecting cable.

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