Safe and simple grounding test liquid crystal display screen
By integrating large-sized grounding test pads on the FPC, the challenge of cumbersome testing and gold finger damage is resolved, enabling safe and efficient grounding connectivity verification.
Patent Information
- Application Number
- CN202422302880.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, the grounding conductivity test of the FPC and the lower frame of the liquid crystal display screen is difficult to be carried out safely and easily, and it is easy to damage the gold fingers, resulting in poor contact.
Set large-size grounding test copper leakage points on the FPC, and bend them to the surface of the bottom plate of the lower iron frame by conductive double-sided adhesive. Combined with the EMI shielding film and PET film design, ensure the safety and reliability of the test process.
It realizes a safe and simple test of the ground conductivity between the FPC and the iron frame, avoids damage to the gold finger, improves the testing efficiency and the electromagnetic shielding ability of the product, and enhances signal transmission stability and production yield.
Smart Images
Figure CN223108190U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal display, and more specifically, to a liquid crystal display screen for grounding test which is safe and simple. Background Art
[0002] In order to improve the anti-static ability of a liquid crystal display screen, generally, a grounding copper leakage block is made on the FPC of the display screen. After the FPC is bent onto the lower iron frame, the grounding copper leakage block is conducted to the lower iron frame through a conductive double-sided adhesive for grounding. After assembly, it is necessary to measure the conductivity between the FPC and the lower iron frame to determine the grounding effect. The general test method is to use the probes of a multimeter to contact the gold fingers of the FPC interface pins and a corner of the lower iron frame respectively to test the conductivity and resistance value. However, due to the overly small size of the gold fingers, it is inconvenient to test and operate with the probes during this process, and the probes are likely to damage the gold fingers during the test, thus causing poor contact of the gold fingers. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is how to safely and simply test the grounding conductivity between the FPC and the lower iron frame, and avoid damaging the gold fingers to cause poor contact of the gold fingers.
[0004] The technical problem to be solved by the utility model is realized through the following technical solutions:
[0005] To solve the above technical problem, the utility model provides a liquid crystal display screen for grounding test which is safe and simple, which includes a lower iron frame, a backlight module and a display module. The lower iron frame includes a bottom plate and side walls extending upward from the edge of the bottom plate; the backlight module is arranged on the upper surface of the bottom plate; the display module is arranged above the backlight module. The display module leads out an FPC. A grounding copper leakage block is arranged on the lower surface of the FPC. A conductive double-sided adhesive is pasted on the lower surface of the grounding copper leakage block. A large-size grounding test copper leakage point is arranged on the upper surface of the FPC. The FPC at the grounding copper leakage block and the grounding test copper leakage point is bent to the lower surface of the bottom plate and is pasted and fixed through the conductive double-sided adhesive.
[0006] As a preferred embodiment of the liquid crystal display screen for grounding test which is safe and simple provided by the utility model, the shape of the grounding test copper leakage point is circular.
[0007] As a preferred embodiment of the liquid crystal display screen for grounding test which is safe and simple provided by the utility model, the diameter of the grounding test copper leakage point is greater than or equal to 1 mm.
[0008] As a preferred embodiment of the safe and simple grounding test liquid crystal display provided by the present utility model, pads are provided on the upper surface of the FPC, EMI shielding films are covered on both the upper surface and the lower surface of the FPC, and an avoidance position is provided on the EMI shielding film at the position of the pads.
[0009] As a preferred embodiment of the safe and simple grounding test liquid crystal display provided by the present utility model, the edge of the EMI shielding film located at the avoidance position is more than 0.5 mm away from the edge of the pad.
[0010] As a preferred embodiment of the safe and simple grounding test liquid crystal display provided by the present utility model, a PET film is provided between the FPC and the EMI shielding film, and the edge of the PET film near the avoidance position extends beyond the edge of the EMI shielding film.
[0011] As a preferred embodiment of the safe and simple grounding test liquid crystal display provided by the present utility model, the edge of the PET film near the avoidance position extends beyond the edge of the EMI shielding film by more than 0.5 mm.
[0012] As a preferred embodiment of the safe and simple grounding test liquid crystal display provided by the present utility model, double-sided adhesives are provided at the bottom of the PET film.
[0013] As a preferred embodiment of the safe and simple grounding test liquid crystal display provided by the present utility model, insulating glue is provided at the edge of the pad.
[0014] As a preferred embodiment of the safe and simple grounding test liquid crystal display provided by the present utility model, the insulating glue covers the avoidance position.
[0015] The present utility model has the following beneficial effects:
[0016] Since large-size grounding test exposed copper points are provided on the upper surface of the FPC, and the grounding test exposed copper points are located on the lower surface after bending, the probes of the multimeter can easily test the conductivity and resistance value between the grounding test exposed copper points and a corner of the lower iron frame. The size of the grounding test exposed copper points is large, and the probes are very convenient for testing operations during this process. Moreover, even if the probes damage the grounding test exposed copper points during the testing process, it will not affect the use of the FPC. It can safely and simply test the grounding conductivity between the FPC and the lower iron frame, and avoid damaging the gold fingers and causing poor contact of the gold fingers. Description of the Drawings
[0017] To more clearly illustrate the solutions in this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic structural diagram of a safe and simple grounding test liquid crystal display screen provided by the present utility model.
[0019] Figure 2 For Figure 1 the front elevation view before the FPC is bent.
[0020] Figure 3 For Figure 2 the schematic structural diagram after the conductive double-sided adhesive is hidden.
[0021] Figure 4 For Figure 1 the front elevation view after the FPC is bent.
[0022] Figure 5 It is the schematic structural diagram of Embodiment 2.
[0023] Figure 6 For Figure 5 the schematic laminated structure diagram.
[0024] Explanation of the reference numerals in the drawings:
[0025] Lower iron frame 1; backlight module 2; display module 3; bottom plate 11; side wall 12; FPC 4; grounding copper leakage block 5; conductive double-sided adhesive 6; grounding test copper leakage point 7;
[0026] Pad 8; EMI shielding film 9; PET film 10. Detailed implementation manners
[0027] To enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.
[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0029] In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0030] The present utility model provides a safe and simple grounding test liquid crystal display screen, which includes a lower iron frame, a backlight module and a display module. The lower iron frame includes a bottom plate and side walls extending upward from the edge of the bottom plate; the backlight module is arranged on the upper surface of the bottom plate; the display module is arranged above the backlight module. The display module leads out an FPC. A grounding leakage copper block is arranged on the lower surface of the FPC. A conductive double-sided adhesive is pasted on the lower surface of the grounding leakage copper block. A large-size grounding test leakage copper point is arranged on the upper surface of the FPC. The FPC at the grounding leakage copper block and the grounding test leakage copper point is bent to the lower surface of the bottom plate and fixed by pasting with the conductive double-sided adhesive.
[0031] Since a large-size grounding test leakage copper point is arranged on the upper surface of the FPC, after bending, the grounding test leakage copper point is located on the lower surface. In this way, the probe of the multimeter can easily test the conductivity and resistance value between the grounding test leakage copper point and a corner of the lower iron frame. The size of the grounding test leakage copper point is large, and the probe is very convenient for testing operation during this process. Moreover, even if the probe damages the grounding test leakage copper point during the test process, it will not affect the use of the FPC. It can safely and simply test the grounding conductivity between the FPC and the lower iron frame, avoiding damage to the gold fingers and causing poor contact of the gold fingers.
[0032] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings. The following describes the present utility model in detail with reference to the drawings and embodiments. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, but should not be construed as a limitation to the present utility model.
[0033] Embodiment 1, please refer to Figures 1 to 4 , a safe and simple grounding test liquid crystal display screen provided by the present utility model, which includes a lower iron frame 1, a backlight module 2 and a display module 3. The lower iron frame 1 includes a bottom plate 11 and side walls 12 extending upward from the edge of the bottom plate 11; the backlight module 2 is arranged on the upper surface of the bottom plate 11; the display module 3 is arranged above the backlight module 2. An FPC 4 is led out from the display module 3. A grounding copper leakage block 5 is arranged on the lower surface of the FPC 4, and a conductive double-sided adhesive 6 is pasted on the lower surface of the grounding copper leakage block 5. A large-size grounding test copper leakage point 7 is arranged on the upper surface of the FPC 4. The FPC 4 at the grounding copper leakage block 5 and the grounding test copper leakage point 7 is bent to the lower surface of the bottom plate 11 and fixed by pasting with the conductive double-sided adhesive 6. Since the large-size grounding test copper leakage point 7 is arranged on the upper surface of the FPC 4, after bending, the grounding test copper leakage point 7 is located on the lower surface. In this way, the probe of the multimeter can easily test the conductivity and resistance value between the grounding test copper leakage point 7 and a corner of the lower iron frame 1. The size of the grounding test copper leakage point 7 is large, and the probe is very convenient for testing operation in this process. Moreover, even if the probe damages the grounding test copper leakage point 7 during the test process, it will not affect the use of the FPC 4. It can safely and simply test the grounding conductivity between the FPC 4 and the lower iron frame 1, and avoid damaging the gold fingers and causing poor contact of the gold fingers.
[0034] Furthermore, the shape of the grounding test copper leakage point 7 is circular, and the diameter of the grounding test copper leakage point 7 is greater than or equal to 1 mm, so as to facilitate the probe to perform the test operation and avoid damaging the gold fingers and causing poor contact of the gold fingers.
[0035] Embodiment 2, please refer to Figure 5 and Figure 6 , as a further optimized solution of Embodiment 1, in this embodiment, a pad 8 is arranged on the upper surface of the FPC 4, and EMI shielding films 9 are covered on both the upper surface and the lower surface of the FPC 4. The EMI shielding film 9 is provided with an avoidance position at the pad 8. Since the EMI shielding films 9 are arranged on both the upper and lower surfaces of the FPC 4, the electromagnetic shielding ability of the FPC 4 can be greatly improved, the stability of signal transmission is improved, various functional problems and problems of poor display effect are avoided, and the competitiveness of the product is improved.
[0036] Furthermore, the edge of the EMI shielding film 9 located at the avoidance position is more than 0.5 mm away from the edge of the pad 8, preventing the edge of the EMI shielding film 9 from contacting the pad 8 and causing an open circuit.
[0037] Furthermore, a PET film 10 is provided between the FPC 4 and the EMI shielding film 9, and the edge of the PET film 10 near the avoidance position extends beyond the edge of the EMI shielding film 9. By extending the edge of the PET film 10 at the position near the pad 8, a certain distance is created between the edge of the PET film 10 and the edge of the EMI shielding film 9, ensuring that even if there are certain operation errors during attachment by the staff, the edge of the EMI shielding film 9 will not touch the edge of the pad 8, thus insulating the edge of the EMI shielding film 9 and preventing the occurrence of short - circuit problems caused by the edge of the EMI shielding film 9 touching the pad 8, and improving the attachment efficiency and production yield.
[0038] Furthermore, the edge of the PET film 10 near the avoidance position extends beyond the edge of the EMI shielding film 9 by more than 0.5 mm. This ensures that the edge of the EMI shielding film 9 does not touch the pad 8, thus insulating the edge of the EMI shielding film 9 and preventing the occurrence of short - circuit problems caused by the edge of the EMI shielding film 9 touching the pad 8, and improving the attachment efficiency and production yield.
[0039] Furthermore, a double - sided adhesive is provided at the bottom of the PET film 10 or glue is coated on the bottom of the PET film 10. Since some PET films 10 do not have adhesiveness or have insufficient adhesiveness, a double - sided adhesive is provided at the bottom of the PET film 10 or glue is coated on it, enabling the PET film 10 to adhere to the FPC 4.
[0040] Furthermore, an insulating glue is provided at the edge of the pad 8, and the insulating glue covers the avoidance position to protect the edge of the pad 8.
[0041] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present utility model can be understood according to specific circumstances.
[0042] Obviously, the embodiments described above are only a part of the embodiments of this application, rather than all the embodiments. The accompanying drawings show the preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of this application more thorough and comprehensive. Although this application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure made by using the content of the specification and drawings of this application, directly or indirectly applied in other related technical fields, is similarly within the scope of patent protection of this application.
Claims
1. A safe and simple grounding test liquid crystal display screen, characterized in that, It includes: A lower iron frame, which includes a bottom plate and side walls extending upward from the edge of the bottom plate; A backlight module, which is arranged on the upper surface of the bottom plate; A display module, which is arranged above the backlight module. The display module leads out an FPC. A grounding copper pour is arranged on the lower surface of the FPC. A conductive double-sided tape is pasted on the lower surface of the grounding copper pour. A large-size grounding test copper pour point is arranged on the upper surface of the FPC. The FPC at the grounding copper pour and the grounding test copper pour point is bent to the lower surface of the bottom plate and fixed by pasting with the conductive double-sided tape.
2. The safe and simple grounding test liquid crystal display screen according to claim 1, wherein, The shape of the grounding test copper pour point is circular.
3. The safe and simple grounding test liquid crystal display screen according to claim 2, wherein The diameter of the grounding test copper pour point is greater than or equal to 1 mm.
4. The safe and simple grounding test liquid crystal display screen according to claim 1, wherein Pads are arranged on the upper surface of the FPC. EMI shielding films cover both the upper surface and the lower surface of the FPC. The EMI shielding films are provided with avoidance positions at the pads.
5. The safety and simplicity ground testing liquid crystal display screen according to claim 4, wherein The edge of the EMI shielding film at the avoidance position is more than 0.5 mm away from the edge of the pad.
6. The safe and simple grounding test liquid crystal display screen according to claim 4, wherein A PET film is arranged between the FPC and the EMI shielding film. The edge of the PET film near the avoidance position extends beyond the edge of the EMI shielding film.
7. The safe and simple grounding test liquid crystal display screen according to claim 6, characterized in that, The edge of the PET film near the avoidance position extends beyond the edge of the EMI shielding film by more than 0.5 mm.
8. The safe and simple grounding test liquid crystal display screen according to claim 6, characterized in that, Double-sided tape is arranged at the bottom of the PET film.
9. The safe and simple grounding test liquid crystal display screen according to claim 4, wherein Insulating glue is arranged at the edge of the pad.
10. The safe and simple grounding test liquid crystal display screen according to claim 9, characterized in that The insulating glue covers the avoidance position.