Liquid crystal display screen capable of avoiding static accumulation
By setting a twistable twisting foot on the bottom of the side wall of the iron frame on the surface of the liquid crystal display screen and in contact with the metal exposed copper block on the PCB, the problem of additional leads in the prior art is solved, and the effective transfer of static electricity and the reduction of product costs are achieved.
Patent Information
- Application Number
- CN202420605187.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-03-26
AI Technical Summary
In the design of existing LCD screens, the surface iron frame still needs to be connected to the ground wire of the PCB through leads to avoid static electricity accumulation and increase product cost and complexity.
A liquid crystal display screen is designed, with a twisted foot on the bottom of the side wall of the iron frame on the surface. The twisted foot can contact and fix it with the metal copper exposed on the PCB, and the static electricity is drawn out to the ground through the metal copper exposed on the ground to avoid accumulation of static electricity.
The static electricity of the surface iron frame can be drawn out without additional leads, reducing product costs, simplifying design, and improving product competitiveness.
Smart Images
Figure CN222784678U_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 which can avoid static electricity accumulation. Background Art
[0002] The display modules used in large-scale equipment are required to have strong anti-collision capabilities, and often adopt a module design scheme in which the surface iron frame is connected to the back PCB. The surface iron frame and the back PCB fix the LCD and backlight between the two. The surface iron frame and the PCB can be fixed by welding or twisting the feet. Although these two methods can fix the PCB board to avoid static electricity accumulation, it is still necessary to conduct the surface iron frame and the ground wire of the PCB through a lead wire, so as to transfer the static electricity accumulated on the surface iron frame to avoid static electricity accumulation and damage to the LCD screen. Utility Model Content
[0003] The technical problem to be solved by the utility model is.
[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:
[0005] In order to solve the above technical problems, the utility model provides a liquid crystal display screen for avoiding static electricity accumulation, which includes a PCB, a backlight module, an LCD module and a surface iron frame, the PCB is provided with a plurality of metal exposed copper blocks, and the metal exposed copper blocks are conductive with a ground wire; the backlight module is arranged above the PCB; the LCD module is arranged above the backlight module; the surface iron frame is arranged above the LCD module, the surface iron frame includes a top plate and a side wall extending downward from the edge of the top plate, the side wall wraps the PCB, the backlight module and the LCD module, the bottom of the side wall is provided with a twist foot, the twist foot can be twisted, and the twist foot can contact the metal exposed copper block and fix the PCB after being twisted, and the number and position of the twist foot correspond to the number and position of the metal exposed copper block.
[0006] As a preferred implementation of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, there are six metal copper-exposed blocks, and the six metal copper-exposed blocks are respectively arranged on the edges of the four sides of the PCB board.
[0007] As a preferred implementation of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, the top plate is provided with a window gap.
[0008] As a preferred embodiment of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, the PCB includes a substrate layer, a circuit layer arranged on the upper surface of the substrate layer, and a metal heat dissipation layer arranged on the lower surface of the substrate layer.
[0009] As a preferred embodiment of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, the PCB also includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and the inner wall of the through-hole is provided with a thermal conductive layer in contact with the circuit layer and the metal heat dissipation layer.
[0010] As a preferred implementation of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, a heat conductor connected to an external heat-conducting structure is arranged in the through hole, and the heat conductor is in contact with the heat-conducting layer.
[0011] As a preferred implementation of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, the structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wavy structure or a honeycomb structure.
[0012] As a preferred embodiment of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, the backlight module includes a reflective sheet, a light guide plate and an optical film group which are stacked in sequence from bottom to top, the upper surface of the light guide plate is provided with at least one glue column, the optical film group is provided with a positioning hole corresponding to the glue column, and the optical film group is mounted on the glue column.
[0013] As a preferred implementation of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, an annular groove surrounding the glue column is provided on the upper surface of the light guide plate at the connection between the light guide plate and the glue column.
[0014] As a preferred implementation of the liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, the cross-sectional shape of the annular groove is square, arc or triangle.
[0015] The utility model has the following beneficial effects:
[0016] Since the bottom of the side wall is provided with a twisting foot, the twisting foot can be twisted, and after being twisted, the twisting foot can contact the metal exposed copper block and fix the PCB, so that the twisting foot can not only fix the PCB but also lead the static electricity of the surface iron frame to the ground wire through the metal exposed copper block, thereby transferring the static electricity accumulated on the surface iron frame to avoid static electricity accumulation and damage to the LCD screen. It does not need to add additional leads to connect the surface iron frame with the ground wire of the PCB, which can save lead materials and wiring costs, reduce product costs, and improve product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 The present invention is a schematic structural diagram of a liquid crystal display screen for preventing static electricity accumulation.
[0019] Figure 2 for Figure 1 Cross-sectional view at AA in the middle.
[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the middle surface iron frame.
[0021] Figure 4 This is a schematic diagram of the structure of Example 2.
[0022] Figure 5 This is a schematic diagram of the structure of Example 3.
[0023] Figure 6 for Figure 5 Schematic diagram of the improved structure.
[0024] Description of Figure Numbers:
[0025] PCB1; backlight module 2; LCD module 3; surface iron frame 4; metal exposed copper block 5; top plate 41; side wall 42; window notch 43; twist foot 44;
[0026] Base material layer 11; circuit layer 12; metal heat dissipation layer 13; through hole 14;
[0027] Reflecting sheet 21 ; light guide plate 22 ; optical film assembly 23 ; adhesive column 24 ; annular groove 25 . DETAILED DESCRIPTION
[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0030] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0031] The utility model provides a liquid crystal display screen for avoiding static electricity accumulation, which comprises a PCB, a backlight module, an LCD module and a surface iron frame, wherein the PCB is provided with a plurality of metal exposed copper blocks, and the metal exposed copper blocks are connected to a ground line; the backlight module is arranged above the PCB; the LCD module is arranged above the backlight module; the surface iron frame is arranged above the LCD module, and the surface iron frame comprises a top plate and a side wall extending downward from the edge of the top plate, the side wall wraps the PCB, the backlight module and the LCD module, and a twist foot is arranged at the bottom of the side wall, the twist foot can be twisted, and after the twist foot is twisted, the twist foot can contact with the metal exposed copper block and fix the PCB, and the number and position of the twist foot correspond to the number and position of the metal exposed copper block.
[0032] Since the bottom of the side wall is provided with a twisting foot, the twisting foot can be twisted, and after being twisted, the twisting foot can contact the metal exposed copper block and fix the PCB, so that the twisting foot can not only fix the PCB but also lead the static electricity of the surface iron frame to the ground wire through the metal exposed copper block, thereby transferring the static electricity accumulated on the surface iron frame to avoid static electricity accumulation and damage to the LCD screen. It does not need to add additional leads to connect the surface iron frame with the ground wire of the PCB, which can save lead materials and wiring costs, reduce product costs, and improve product competitiveness.
[0033] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.
[0034] Example 1
[0035] See also Figures 1 to 3 , a liquid crystal display screen for avoiding static electricity accumulation provided by the utility model, comprises PCB1, a backlight module 2, an LCD module 3 and a surface iron frame 4, PCB1 is provided with a plurality of metal exposed copper blocks 5. In this embodiment, there are six metal exposed copper blocks 5, and the six metal exposed copper blocks 5 are respectively arranged on the edges of the four sides of the PCB1 board. The metal exposed copper block 5 is connected to the ground wire; the backlight module 2 is arranged above the PCB1; the LCD module 3 is arranged above the backlight module 2; the surface iron frame 4 is arranged above the LCD module 3, and the surface iron frame 4 includes a top plate 41 and a side wall 42, the side wall 42 is formed by extending downward from the edge of the top plate 41, the top plate 41 is provided with a window gap 43, the window gap 43 is located in the display area, the side wall 42 wraps the PCB1, the backlight module 2 and the LCD module 3, and the bottom of the side wall 42 is provided with a twist foot 44, the twist foot 44 can be twisted, and the twist foot 44 can contact with the metal exposed copper block 5 and fix the PCB1 after being twisted, and the number and position of the twist foot 44 correspond to the number and position of the metal exposed copper block 5. Since the bottom of the side wall 42 is provided with a twisting foot 44, the twisting foot 44 can be twisted, and after being twisted, the twisting foot 44 can contact with the metal exposed copper block 5 and fix the PCB1, so that the twisting foot 44 can not only fix the PCB1 but also lead the static electricity of the surface iron frame 4 to the ground through the metal exposed copper block 5, thereby transferring the static electricity accumulated on the surface iron frame 4 to avoid static electricity accumulation and damage to the liquid crystal display. It does not need to add additional leads to connect the surface iron frame 4 with the ground of PCB1, which can save lead materials and wiring costs, reduce product costs, and improve product competitiveness.
[0036] Example 2
[0037] See also Figure 4As a further optimization scheme of Example 1, in this embodiment, the PCB1 includes a substrate layer 11, a circuit layer 12 arranged on the upper surface of the substrate layer 11, and a metal heat dissipation layer 13 arranged on the lower surface of the substrate layer 11. The arrangement method can be that the circuit layer 12 and the metal heat dissipation layer 13 are respectively attached to the substrate layer 11 by double-sided adhesive. Since the thickness of the substrate layer 11 is relatively thin, the heat on the PCB1 can be diffused to the metal heat dissipation layer 13 through the substrate layer 11. The metal heat dissipation layer 13 can effectively increase the heat dissipation area of the PCB1 and play a role in uniform heat dissipation, thereby improving the heat dissipation efficiency of the PCB1. The substrate layer 11 can be any one of polyimide, polyester, polysulfone or polytetrafluoroethylene, the double-sided adhesive is any one of an acrylic adhesive layer or an epoxy resin adhesive layer, and the metal heat dissipation layer 13 can be a copper foil layer.
[0038] Furthermore, PCB1 further includes at least one through-hole 14 penetrating the substrate layer 11, the circuit layer 12 and the metal heat dissipation layer 13, and the inner wall of the through-hole 14 is provided with a heat-conducting layer in contact with the circuit layer 12 and the metal heat dissipation layer 13. By utilizing the good thermal conductivity of the through-hole 14, the circuit layer 12 and the metal heat dissipation layer 13 on both sides of the substrate layer 11 can be electrically connected to play a good thermal conductivity function, and the thermal conductive layer can provide a thermal conductive function to achieve a good heat dissipation effect. Among them, the thermal conductive layer can be a copper glue conductive ink layer.
[0039] Furthermore, a heat conductor connected to an external heat-conducting structure is disposed in the through hole 14. The heat conductor is connected to the external heat-conducting structure from one side of the circuit layer 12 and is also in contact with the heat-conducting layer in the through hole 14, so that the circuit layer 12 and the metal heat dissipation layer 13 can be connected to the external heat-conducting structure through the through hole 14, so that the heat in the PCB 1 is diffused to the external heat-conducting structure through the heat conductor in the through hole 14, so as to further improve the heat dissipation efficiency of the PCB 1. Preferably, in order to enable the through hole 14 to be connected to the external heat-conducting structure, the through hole 14 is disposed at the edge of the PCB 1.
[0040] Furthermore, the metal heat dissipation layer 13 is a uniform heat dissipation structure, and its structure can be any one of a mesh structure, a strip structure, a wavy structure or a honeycomb structure. Through the uniform heat dissipation structure, the heat dissipation effect can be better improved.
[0041] Example 3
[0042] See also Figure 5As a further optimization scheme of Embodiment 1, in this embodiment, the backlight module 2 includes a reflective sheet 21, a light guide plate 22 and an optical film group 23 which are sequentially stacked from bottom to top. At least one glue column 24 is provided on the upper surface of the light guide plate 22. In this embodiment, four are preferably provided, which are evenly distributed at the four corners of the light guide plate 22. The optical film group 23 is provided with positioning holes corresponding to the glue columns 24, and the optical film group 23 is sleeved on the glue columns 24. The positioning holes on the optical film group 23 can be positioned and fixed by the glue columns 24, and there is no need to use auxiliary jigs for positioning. The assembly process is simple and the assembly accuracy is high, which can reduce the production cost of the backlight module 2.
[0043] See also Figure 6 , because when the number of molds manufactured is large, the mold at the glue column 24 will be worn to a certain extent, and the wear here will cause a fillet to be formed between the light guide plate 22 and the glue column 24 produced later. When the fillet exists, the optical film group 23 will interfere with the fillet, resulting in the inability to install the optical film group 23. Therefore, preferably, the upper surface of the light guide plate 22 is provided with a ring groove 25 surrounding the glue column 24 at the connection between the light guide plate 22 and the glue column 24. When the mold is worn, it will only be worn at the ring groove 25, so as to avoid the edge corner of the glue column 24 being rounded due to the wear of the mold, which will interfere with other parts and affect the assembly accuracy, thereby improving the yield rate and assembly efficiency.
[0044] Furthermore, the cross-sectional shape of the annular groove 25 is square, arc or triangle, but not limited thereto. The square, arc and triangle structures are simple and easy to manufacture; and the assembly accuracy will not be affected after the mold is worn.
[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0046] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they 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 disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.
Claims
1. A liquid crystal display screen for preventing static electricity accumulation, characterized in that: It includes: A PCB is provided with a plurality of metal exposed copper blocks, wherein the metal exposed copper blocks are connected to a ground wire; A backlight module is arranged above the PCB; An LCD module is arranged above the backlight module; A surface iron frame is arranged above the LCD module, the surface iron frame comprises a top plate and side walls extending downward from the edge of the top plate, the side walls wrap the PCB, the backlight module and the LCD module, and twist feet are arranged at the bottom of the side walls, the twist feet can be twisted, and after being twisted, the twist feet can contact with the metal exposed copper blocks and fix the PCB, and the number and positions of the twist feet correspond to the number and positions of the metal exposed copper blocks.
2. The liquid crystal display screen for preventing static electricity accumulation according to claim 1, characterized in that: There are six metal copper-exposed blocks, and the six metal copper-exposed blocks are respectively arranged on the edges of the four sides of the PCB board.
3. The liquid crystal display screen for preventing static electricity accumulation according to claim 1, characterized in that: The top plate is provided with a window opening.
4. The liquid crystal display screen for preventing static electricity accumulation according to claim 1, characterized in that: The PCB includes a substrate layer, a circuit layer arranged on the upper surface of the substrate layer, and a metal heat dissipation layer arranged on the lower surface of the substrate layer.
5. The liquid crystal display screen for preventing static electricity accumulation according to claim 4, characterized in that: The PCB further includes at least one through-hole penetrating the substrate layer, the circuit layer and the metal heat dissipation layer, and an inner wall of the through-hole is provided with a heat-conducting layer in contact with the circuit layer and the metal heat dissipation layer.
6. The liquid crystal display screen for preventing static electricity accumulation according to claim 5, characterized in that: A heat conductor connected to an external heat-conducting structure is arranged in the through hole, and the heat conductor is in contact with the heat-conducting layer.
7. The liquid crystal display screen for preventing static electricity accumulation according to claim 4, characterized in that: The structure of the metal heat dissipation layer is a mesh structure, a strip structure, a wave structure or a honeycomb structure.
8. The liquid crystal display screen for preventing static electricity accumulation according to claim 1, characterized in that: The backlight module includes a reflective sheet, a light guide plate and an optical film group which are stacked in sequence from bottom to top. The upper surface of the light guide plate is provided with at least one glue column. The optical film group is provided with a positioning hole corresponding to the glue column. The optical film group is sleeved on the glue column.
9. The liquid crystal display screen for preventing static electricity accumulation according to claim 8, characterized in that: An annular groove surrounding the glue column is provided on the upper surface of the light guide plate at the connection between the light guide plate and the glue column.
10. The liquid crystal display screen for preventing static electricity accumulation according to claim 9, characterized in that: The cross-sectional shape of the annular groove is square, arc or triangle.