Vehicle-mounted display screen aluminum foil tape electromagnetic shielding and heat dissipation structure

Abstract

The utility model discloses a vehicle-mounted display screen aluminum foil tape electromagnetic shielding and heat dissipation structure which comprises a glass cover plate, sheet optical cement, polyurethane hot melt adhesive, a display screen assembly, a backlight source assembly, a magnesium alloy outer shell, a printed circuit board and a metal plate rear shell which are sequentially arranged from front to back. The glass cover plate is connected with the display screen assembly through sheet optical cement, the display screen assembly comprises a display screen and an aluminum foil tape, the display screen is connected with the sheet optical cement through polyurethane hot melt adhesive, the aluminum foil tape is arranged at the turning position of the display screen, the backlight source assembly is arranged on the display screen, and the magnesium alloy shell is arranged on the backlight source assembly. The printed circuit board is arranged on the magnesium alloy shell, and the metal plate rear shell is arranged on the printed circuit board. Therefore, the surface temperature of the display screen is reduced, the increasingly strict temperature rise requirement of the display screen is met, the service life of the whole display screen is prolonged, and the user experience is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle-mounted displays, and in particular to an electromagnetic shielding and heat dissipation structure for an aluminum foil tape on a vehicle-mounted display. Background Technology

[0002] With the widespread adoption of 5G and vehicle-to-everything (V2X) technologies, the shielding requirements for high-frequency electromagnetic interference in automotive electronic devices are increasing. New shielding tapes are increasingly employing nanomaterials (such as carbon nanotubes and graphene) and metallized fibers to enhance shielding effectiveness in high-frequency bands. For example, 3M's fourth-generation conductive fabric tapes (such as the 511XDF series) maintain stable impedance performance during aging tests through optimized material structure, adapting to the harsh automotive environment.

[0003] Shielding tapes are no longer limited to a single function, but are developing towards an integrated approach of "electromagnetic shielding + heat dissipation + structural bonding". For example, CEF-3BV conductive tape replaces the traditional iron frame design, combining the advantages of light shielding, EMI shielding and simplified bonding process, with a cost of only 1 / 6 of that of an iron frame.

[0004] New energy vehicles have higher requirements for electromagnetic compatibility and heat dissipation. Conductive tape eliminates potential differences through grounding, reducing signal interference. 3M's CEF-3BV tape features a full-lamination design, outperforming traditional metal structures in ESD testing and reducing the risk of light leakage. High thermal conductivity adhesive films (e.g., 1.3–1.5 W / m·K) effectively solve the heat generation problem of OLED modules, preventing screen burn-in and extending component lifespan. These materials, by optimizing the substrate and adhesive structure, balance thermal conductivity and bond strength, adapting to the requirements of thinner and lighter automotive displays and higher heat dissipation.

[0005] In the future, as in-vehicle displays develop towards larger sizes and multi-screen collaboration, shielding tape will focus more on material innovation and process optimization to cope with complex electromagnetic environments and heat dissipation challenges. Utility Model Content

[0006] This utility model aims to at least partially solve one of the technical problems in the related art.

[0007] To achieve the above objectives, this utility model proposes an electromagnetic shielding and heat dissipation structure for an aluminum foil tape on a vehicle-mounted display screen, comprising, from front to back, a glass cover plate, a sheet optical adhesive, a polyurethane hot melt adhesive, a display screen assembly, a backlight assembly, a magnesium alloy shell, a printed circuit board, and a sheet metal back cover. The glass cover plate is connected to the display screen assembly via the sheet optical adhesive. The display screen assembly includes a display screen and an aluminum foil tape, wherein the display screen is connected to the sheet optical adhesive via the polyurethane hot melt adhesive. The aluminum foil tape is positioned at the bends of the display screen. The backlight assembly is positioned on the display screen. The magnesium alloy shell is positioned on the backlight assembly. The printed circuit board is positioned on the magnesium alloy shell. The sheet metal back cover is positioned on the printed circuit board.

[0008] In addition, the electromagnetic shielding and heat dissipation structure of the aluminum foil tape for the vehicle display screen proposed in the above application may also have the following additional technical features:

[0009] Specifically, the backlight assembly includes an optical film, a light guide plate, a light strip, and a backlight aluminum shell, wherein the optical film is disposed on the display screen; the light guide plate is connected to the optical film via aluminum foil tape; the light strip is disposed on the backlight aluminum shell; and the backlight aluminum shell is disposed on the magnesium alloy shell.

[0010] Specifically, the bottom of the magnesium alloy shell is provided with a buffer component, which consists of four sets and is a buffer pad.

[0011] Specifically, the aluminum foil tape includes a black aluminum foil layer, a PET layer, and a transparent double-sided adhesive layer, wherein the black aluminum foil layer, the PET layer, and the transparent double-sided adhesive layer are arranged sequentially from the outside to the inside.

[0012] Specifically, the backlight aluminum shell is formed by stamping aluminum sheet.

[0013] Specifically, the sheet metal rear shell is formed by stamping 0.6mm thick hot-dip galvanized sheet metal.

[0014] This utility model provides an electromagnetic shielding and heat dissipation structure for an aluminum foil tape used in a vehicle-mounted display screen, which has the following advantages:

[0015] 1. The display screen of this patent is first installed inside the backlight assembly and fixed to the backlight assembly with aluminum foil tape around its perimeter. The aluminum foil tape serves to prevent static electricity and improve the safety of the display screen; at the same time, the aluminum foil tape is bonded to the back of the backlight aluminum plate, which can quickly transfer the heat of the display screen to the backlight aluminum plate, thereby reducing the surface temperature of the display screen and improving the user experience.

[0016] 2. This patented back cover is made of magnesium alloy semi-solid die casting and is also spray-painted as an exterior component. Traditional floating screen back covers are made of spray-painted plastic parts, but these cannot meet the technical requirements of narrow bezels and have problems such as uneven gaps with the glass cover and cracking of the glass cover due to pressure. This patented back cover uses magnesium alloy spraying, which reduces the number of parts while ensuring the overall strength of the product, effectively reducing the thickness of the display screen. Through this patent, lightweight and integrated design is achieved while meeting the customer's strict experimental requirements, simplifying overall assembly and improving production efficiency.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the display screen assembly structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the aluminum foil tape connection structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the backlight assembly structure of this utility model.

[0023] As shown in the figure: 1. Glass cover plate; 2. Optical adhesive sheet; 3. Polyurethane hot melt adhesive; 4. Display screen assembly; 5. Backlight assembly; 6. Magnesium alloy shell; 7. Printed circuit board; 8. Sheet metal back shell; 9. Display screen; 10. Aluminum foil tape; 11. Optical film; 12. Light guide plate; 13. Light strip; 14. Backlight aluminum shell; 15. Buffer component. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the appended spirit and connotation.

[0025] The electromagnetic shielding and heat dissipation structure of an aluminum foil tape for a vehicle-mounted display screen according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown in the figure, an embodiment of the present invention provides an electromagnetic shielding and heat dissipation structure for an aluminum foil tape used in a vehicle display screen, comprising a glass cover plate 1, a sheet optical adhesive 2, a polyurethane hot melt adhesive 3, a display screen assembly 4, a backlight assembly 5, a magnesium alloy shell 6, a printed circuit board 7, and a sheet metal back shell 8 arranged sequentially from front to back.

[0027] The glass cover plate 1 is connected to the display assembly 4 via sheet optical adhesive 2. The display assembly 4 includes a display screen 9 and aluminum foil tape 10.

[0028] It should be noted that the aluminum foil tape 10 has a strip structure design. Two aluminum foil tapes 10 are provided at the bend of the display screen 9 and are crisscrossed and bonded together, which can effectively play an anti-static role. The aluminum foil tape 10 fixes the display screen 9 inside the backlight assembly 5 and then extends to the back of the backlight aluminum shell 14, which can quickly conduct the heat of the display screen 9 to the backlight aluminum shell 14.

[0029] The display screen 9 is connected by polyurethane hot melt adhesive 3 and sheet optical adhesive 2. Aluminum foil tape 10 is placed at the bend of the display screen 9, and the backlight assembly 5 is placed on the display screen 9. The magnesium alloy shell 6 is placed on the backlight assembly 5, the printed circuit board 7 is placed on the magnesium alloy shell 6, and the sheet metal back shell 8 is placed on the printed circuit board 7.

[0030] It should be noted that the optical adhesive 2 has high light transmittance, bonding and peel strength, and is resistant to high temperature, high humidity, and UV light, making it widely applicable in automotive displays and the consumer electronics industry. The magnesium alloy shell 6 is made of magnesium alloy through semi-solid die casting and is used as a surface coating for exterior parts. Magnesium alloy is characterized by high strength and light weight, and is widely used in the automotive industry. Semi-solid die casting offers advantages such as low energy consumption, high precision, dense metallographic structure, fewer product defects, and excellent mechanical properties, making it very suitable for use as an exterior part.

[0031] In one embodiment of this utility model, such as Figure 1-4 As shown, the backlight assembly 5 includes an optical film 11, a light guide plate 12, a light strip 13, and a backlight aluminum shell 14.

[0032] Among them, the optical film 11 is set on the display screen 9, the light guide plate 12 is connected to the optical film 11 through the aluminum foil tape 10, the light strip 13 is set on the backlight aluminum shell 14, and the backlight aluminum shell 14 is set on the magnesium alloy shell 6.

[0033] It should be noted that the optical film 11 and the light guide plate 12 act on the display screen 9 to enhance the brightness. Subsequently, the display screen 9, aluminum foil tape 10, optical film 11, light guide plate 12 and light strip 13 are sequentially installed in the backlight aluminum shell 14.

[0034] In one embodiment of this utility model, such as Figure 1 As shown, the bottom of the magnesium alloy shell 6 is provided with a buffer component 15, which consists of four sets and is a buffer pad.

[0035] It should be noted that the four buffer components 15 use buffer rubber pads to effectively prevent vibration and abnormal noise of the whole machine.

[0036] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the aluminum foil tape 10 includes a black aluminum foil layer, a PET layer, and a transparent double-sided adhesive layer.

[0037] The black aluminum foil layer, PET layer, and transparent double-sided adhesive layer are arranged sequentially from the outside to the inside.

[0038] It should be noted that the aluminum foil tape 10 adopts a three-layer structure: the surface is a black aluminum foil layer, which mainly serves to prevent static electricity and conduct heat; the middle layer is a PET layer; and the inner layer is a transparent double-sided adhesive, which serves both as an adhesive and a heat conductor. The surface aluminum foil layer can effectively reduce the impact of external static electricity on the display screen's display effect. The aluminum foil tape 10 fixes the display screen 9 inside the backlight assembly 5 and then extends to the back of the backlight aluminum shell 14, enabling the heat from the display screen 9 to be quickly transferred to the backlight aluminum shell 14.

[0039] In one embodiment of this utility model, such as Figure 1 and Figure 3 As shown, the backlight aluminum shell 14 is formed by stamping aluminum sheet.

[0040] It should be noted that the backlight aluminum shell 14 is made of 5052 aluminum plate, which is precision stamped and formed. It has good ductility and thermal conductivity, and the cost can be reduced by 40% compared with die-cast aluminum.

[0041] In one embodiment of this utility model, such as Figure 1 As shown, the sheet metal back cover 8 is formed by stamping 0.6mm thick hot-dip galvanized sheet metal.

[0042] It should be noted that the sheet metal back cover 8 is made of 0.6mm thick hot-dip galvanized sheet metal, which serves as both a shield and a protector of the printed circuit board 7.

[0043] Specifically, the steps for electromagnetic shielding and heat dissipation of the vehicle display screen using aluminum foil tape 10 are as follows: the display screen 9 is installed inside the backlight assembly 5. During the installation process, two aluminum foil tapes 10 are poorly bonded together at the bend of the display screen 9. By fixing the display screen 9 inside the backlight assembly 5, the aluminum foil tape 10 is extended to the back of the backlight aluminum shell 14, thereby quickly transferring the heat of the display screen 9 to the backlight aluminum shell 14.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electromagnetic shielding and heat dissipation structure for an aluminum foil tape used in vehicle-mounted displays, characterized in that, The components, arranged sequentially from front to back, include a glass cover (1), sheet optical adhesive (2), polyurethane hot melt adhesive (3), a display assembly (4), a backlight assembly (5), a magnesium alloy housing (6), a printed circuit board (7), and a sheet metal back cover (8). The glass cover plate (1) is connected to the display screen assembly (4) via the sheet optical adhesive (2); The display assembly (4) includes a display screen (9) and aluminum foil tape (10), wherein, The display screen (9) is connected by the polyurethane hot melt adhesive (3) and the sheet optical adhesive (2); The aluminum foil tape (10) is placed at the bend of the display screen (9); The backlight assembly (5) is disposed on the display screen (9); The magnesium alloy shell (6) is disposed on the backlight assembly (5); The printed circuit board (7) is disposed on the magnesium alloy casing (6); The sheet metal back cover (8) is mounted on the printed circuit board (7).

2. The electromagnetic shielding and heat dissipation structure of aluminum foil tape for vehicle-mounted displays according to claim 1, characterized in that, The backlight assembly (5) includes an optical film (11), a light guide plate (12), a light strip (13), and a backlight aluminum shell (14), wherein, The optical film (11) is disposed on the display screen (9); The light guide plate (12) is connected to the optical film (11) via the aluminum foil tape (10). The light strip (13) is disposed on the aluminum shell (14) of the backlight source; The backlight aluminum shell (14) is mounted on the magnesium alloy shell (6).

3. The electromagnetic shielding and heat dissipation structure of aluminum foil tape for vehicle-mounted displays according to claim 1, characterized in that, The bottom of the magnesium alloy shell (6) is provided with a buffer component (15), which consists of four sets and is a buffer pad.

4. The electromagnetic shielding and heat dissipation structure of aluminum foil tape for vehicle-mounted displays according to claim 2, characterized in that, The aluminum foil tape (10) comprises a black aluminum foil layer, a PET layer, and a transparent double-sided adhesive layer, wherein, The black aluminum foil layer, PET layer, and transparent double-sided adhesive layer are arranged sequentially from the outside to the inside.

5. The electromagnetic shielding and heat dissipation structure of aluminum foil tape for vehicle-mounted displays according to claim 2, characterized in that, The backlight aluminum shell (14) is formed by stamping aluminum plate.

6. The electromagnetic shielding and heat dissipation structure of aluminum foil tape for vehicle-mounted display screen according to claim 1, characterized in that, The sheet metal rear shell (8) is formed by stamping 0.6mm thick hot-dip galvanized sheet metal.

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