Liquid crystal display screen capable of improving FPC grounding reliability
By opening a through hole on the FPC and covering the solder layer, and connecting the FPC with the metal grounding device with the soldering technology, the problem of low cleanliness and flatness affecting the FPC grounding is solved, and effective static electricity is derived and the reliability of FPC grounding is improved.
Patent Information
- Application Number
- CN202421751144.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In the presence of low cleanliness and flatness, the FPC grounding effect is poor, resulting in the inability to effectively export static electricity, reducing the reliability of FPC grounding.
A through hole is opened on the FPC, and a solder layer is covered at the exposed copper portion and through holes. The solder layer covers the surface of the metal grounding device, and the FPC is soldered together with the metal grounding device by welding.
Connecting the FPC with the metal grounding device through welding significantly reduces the dependence on the cleanliness and flatness of the adhesive surface, ensures that static electricity can be effectively exported, and improves the reliability of FPC grounding.
Smart Images
Figure CN222965513U_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 improving the grounding reliability of FPC. Background Art
[0002] In order to improve the anti-static performance of the liquid crystal display screen, usually the copper on the surface of the FPC of the display screen is exposed, then a conductive adhesive is pasted at the exposed copper part, and then the FPC is bent to the back of the backlight module. The exposed copper part of the FPC is attached to the metal grounding device on the back of the backlight module through the conductive adhesive, so as to realize the electrical connection between the FPC of the display screen and the metal grounding device on the back of the backlight module, and to export the static electricity of the display screen. However, since the conductive adhesive is easily affected by the cleanliness and flatness of the pasting surface, the grounding effect is poor in some occasions with low cleanliness and flatness, and thus the static electricity cannot be effectively exported, reducing the grounding reliability of the FPC. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is how to avoid the influence of the cleanliness and flatness on the static electricity export of the FPC as much as possible, ensure that the static electricity can be effectively exported, and improve the grounding reliability of the FPC.
[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 improving the grounding reliability of FPC, which includes a backlight module and a display module. A metal grounding device is arranged on the back of the backlight module. The display module is arranged above the backlight module. The display module leads out an FPC outwards. The FPC is bent to the lower surface of the backlight module. At least one through hole is opened on the FPC located on the lower surface of the backlight module. An exposed copper part is arranged on the FPC. The number of the exposed copper parts is equal to the number of the through holes. The exposed copper parts are arranged around the through holes. A solder layer is arranged at each through hole. The solder layer covers the surface of the exposed copper part, the through hole and the surface of the metal grounding device.
[0006] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of FPC provided by the utility model, the metal grounding device is a lower iron frame, a client case or a main board.
[0007] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of FPC provided by the utility model, there are two through holes.
[0008] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of FPC provided by the utility model, a trace label paper is arranged on the surface of the FPC.
[0009] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of the FPC provided by the present utility model, a shielding paper is provided on the surface of the FPC, and the shielding paper covers the surface of the FPC and the trace label paper.
[0010] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of the FPC provided by the present utility model, the shielding paper includes a shielding layer, an adhesive layer, and a non-adhesive layer which are sequentially stacked from top to bottom. The size and position of the non-adhesive layer correspond to the size and position of the trace label paper. The non-adhesive layer covers the trace label paper, and the adhesive layer covers the surface of the FPC.
[0011] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of the FPC provided by the present utility model, the thickness of the non-adhesive layer is 0.03 mm - 0.06 mm.
[0012] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of the FPC provided by the present utility model, the edge of the non-adhesive layer extends 1.5 mm to 3 mm beyond the edge of the trace label paper.
[0013] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of the FPC provided by the present utility model, the appearance colors of the non-adhesive layer and the shielding layer are different.
[0014] As a preferred embodiment of the liquid crystal display screen for improving the grounding reliability of the FPC provided by the present utility model, the color of the non-adhesive layer is white, and the color of the shielding layer is black.
[0015] The present utility model has the following beneficial effects:
[0016] Since through holes are provided on the FPC, and the solder layer covers the exposed copper part, the through holes, and the metal grounding device, in specific implementation, the FPC and the metal grounding device can be welded together by welding. It is hardly affected by the cleanliness and flatness of the bonding surface, which can ensure that static electricity is effectively conducted out, thereby improving the grounding reliability of the FPC and enhancing the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the solutions in the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1Schematic diagram of a liquid crystal display structure for improving the grounding reliability of an FPC provided by the present utility model.
[0019] Figure 2 is Figure 1 bottom view of.
[0020] Figure 3 is Figure 2 schematic diagram of the improved structure at the FPC in.
[0021] Figure 4 Schematic diagram of the shielding paper structure.
[0022] Figure 5 Schematic diagram of the laminated structure of the shielding paper.
[0023] Explanation of the reference numerals in the drawings:
[0024] Backlight module 1; Display module 2; Metal grounding device 3; FPC 4; Through hole 41; Exposed copper part 42; Solder layer 5;
[0025] Trace label paper 6; Shielding paper 7; Shielding layer 71; Adhesive layer 72; Non-adhesive layer 73. Specific implementation manners
[0026] In order to enable those skilled in the art of the present technology to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying 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 making creative efforts shall fall within the protection scope of the present utility model.
[0027] 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 the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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, and therefore should not be construed as a limitation to the present utility model.
[0028] In addition, the terms "first", "second", and "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, features defined with "first", "second", and "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.
[0029] The present utility model provides a liquid crystal display screen for improving the grounding reliability of an FPC, which includes a backlight module and a display module. A metal grounding device is provided on the back surface of the backlight module. The display module is disposed above the backlight module. The display module leads out an FPC outward, and the FPC is bent to the lower surface of the backlight module. At least one through hole is formed in the FPC located on the lower surface of the backlight module. An exposed copper portion is provided on the FPC, and the number of the exposed copper portions is equal to the number of the through holes. The exposed copper portions are disposed around the through holes. A solder layer is provided at each through hole, and the solder layer covers the surface of the exposed copper portion, the through hole, and the surface of the metal grounding device.
[0030] Since through holes are formed in the FPC and the solder layer covers the exposed copper portion, the through hole, and the metal grounding device, in specific implementation, the FPC and the metal grounding device can be welded together by welding, and it is hardly affected by the cleanliness and flatness of the bonding surface, which can ensure effective electrostatic conduction, thereby improving the grounding reliability of the FPC and enhancing the competitiveness of the product.
[0031] To enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. The present utility model will be described in detail below with reference to the drawings and embodiments. The examples of the embodiments are shown in the drawings, in which 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 with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.
[0032] Please refer to Figure 1 and Figure 2, a liquid crystal display screen for improving the grounding reliability of FPC4 provided by the present utility model, which includes a backlight module 1 and a display module 2. A metal grounding device 3 is arranged on the back surface of the backlight module 1. The display module 2 is arranged above the backlight module 1. An FPC4 is led out from the display module 2 and bent to the lower surface of the backlight module 1. At least one through hole 41 is formed in the FPC4 on the lower surface of the backlight module 1. An exposed copper part 42 is arranged on the FPC4, and the number of the exposed copper parts 42 is equal to the number of the through holes 41. The exposed copper parts 42 are arranged around the through holes 41. A solder layer 5 is arranged at each through hole 41, and the solder layer 5 covers the surface of the exposed copper part 42, the through hole 41 and the surface of the metal grounding device 3. Since the through holes 41 are formed in the FPC4 and the solder layer 5 covers the exposed copper part 42, the through hole 41 and the metal grounding device 3, in specific implementation, the FPC4 and the metal grounding device 3 can be welded together by welding. It is hardly affected by the cleanliness and flatness of the bonding surface, and can ensure that static electricity is effectively conducted out, thereby improving the grounding reliability of the FPC4 and enhancing the competitiveness of the product.
[0033] Further, the metal grounding device 3 is a lower iron frame, a client case or a main board. If the metal grounding device 3 is a lower iron frame, it can be directly welded to the FPC4. In this embodiment, the metal grounding device 3 is a lower iron frame, and the lower surface of the lower iron frame has a nickel plating layer and can be directly welded to the FPC4.
[0034] Further, there are two through holes 41 to prevent the ineffective conduction of static electricity when a certain circuit fails.
[0035] Please refer to Figures 3 to 5 , as a further optimized solution of Embodiment 1, in this embodiment, a trace label paper 6 and a shielding paper 7 are arranged on the surface of the FPC4. The trace label paper 6 is pasted on the surface of the FPC4, and the shielding paper 7 covers the surface of the FPC4 and the trace label paper 6. The shielding paper 7 includes a shielding layer 71, an adhesive layer 72 and a non-adhesive layer 73 which are sequentially stacked from top to bottom. The size and position of the non-adhesive layer 73 correspond to the size and position of the trace label paper 6, and the non-adhesive layer 73 covers the trace label paper 6, and the adhesive layer 72 covers the surface of the FPC4. Since the non-adhesive layer 73 is arranged at the lowermost layer of the shielding paper 7 and the non-adhesive layer 73 covers the trace label paper 6, while the adhesive layer 72 covers other areas on the surface of the FPC4, that is, by adding a non-adhesive non-adhesive layer 73 in the corresponding area of the trace label paper 6, the adhesiveness of the shielding paper 7 is isolated from the trace label paper 6, which can avoid the problem that the trace code on the trace label paper 6 is easily peeled off due to the adhesiveness of the shielding paper 7 during rework and improve the traceability of product accessories.
[0036] Further, the thickness of the non-adhesive layer 73 is 0.03 mm - 0.06 mm. The edge of the non-adhesive layer 73 extends 1.5 mm to 3 mm beyond the edge of the trace label paper 6 to ensure that the non-adhesive layer 73 can still completely cover the trace label paper 6 in case of an application deviation. Additionally, the appearance colors of the non-adhesive layer 73 and the shielding layer 71 are different so that it is easy to visually distinguish whether there is a problem of missed application of the non-adhesive layer 73, ensuring product consistency. More preferably, the color of the non-adhesive layer 73 is white and the color of the shielding layer 71 is black. Using white and black can better distinguish the non-adhesive layer 73 and the shielding layer 71.
[0037] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may 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 terms in the present utility model can be understood according to specific circumstances.
[0038] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all embodiments. The accompanying drawings show preferred embodiments of the present application, but do not limit the patent scope of the present application. The present 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 the present application more thorough and comprehensive. Although the present 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 described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structures directly or indirectly using the content of the specification and drawings of the present application in other related technical fields shall be similarly within the scope of patent protection of the present application.
Claims
1. A liquid crystal display screen for improving the grounding reliability of FPC, characterized in that: It includes a backlight module and a display module. A metal grounding device is arranged on the back of the backlight module. The display module is arranged above the backlight module. An FPC is led outward from the display module. The FPC is bent to the lower surface of the backlight module. At least one through hole is opened on the FPC located on the lower surface of the backlight module. Copper exposed parts are arranged on the FPC. The number of the copper exposed parts is equal to the number of the through holes. The copper exposed parts are arranged around the through holes. A solder layer is arranged at each of the through holes. The solder layer covers the surface of the copper exposed part, the through hole and the surface of the metal grounding device.
2. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 1, characterized in that: The metal grounding device is a lower iron frame, a client housing or a mainboard.
3. The liquid crystal display screen for improving FPC grounding reliability according to claim 1, characterized in that: There are two through holes.
4. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 1, characterized in that: A traceability label paper is provided on the surface of the FPC.
5. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 4, characterized in that: Shielding paper is arranged on the surface of the FPC, and the shielding paper covers the surface of the FPC and the traceability label paper.
6. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 5, characterized in that: The shielding paper includes a shielding layer, a glue layer and a non-adhesive layer stacked in sequence from top to bottom, the size and position of the non-adhesive layer correspond to the size and position of the traceability label paper, the non-adhesive layer covers the traceability label paper, and the glue layer covers the surface of the FPC.
7. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 6, characterized in that: The thickness of the non-adhesive layer is 0.03 mm to 0.06 mm.
8. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 6, characterized in that: The edge of the non-adhesive layer exceeds the edge of the traceability label paper by 1.5 mm to 3 mm.
9. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 6, characterized in that: The non-adhesive layer and the shielding layer have different appearance colors.
10. The liquid crystal display screen for improving the grounding reliability of FPC according to claim 6, characterized in that: The color of the non-adhesive layer is white, and the color of the shielding layer is black.