Vehicle-mounted central control display screen with narrow frame and no backlight rubber frame structure

Abstract

The utility model discloses a vehicle-mounted central control display screen with a narrow frame and no backlight rubber frame structure, which comprises a display screen component, polyurethane hot melt adhesive, a backlight source component, a printed circuit board and a plastic rear shell which are sequentially arranged from front to back, the polyurethane hot melt adhesive is arranged between the display screen component and the backlight source component, and the printed circuit board is arranged between the display screen component and the backlight source component. The polyurethane hot melt adhesive is sprayed on the periphery of the backlight source assembly, the printed circuit board is arranged on the backlight source assembly, and the plastic rear shell is connected with the printed circuit board and the backlight source assembly. Therefore, a middle rubber frame is omitted, the narrow frame design is realized while the cost is reduced, and in order to realize fixation of the optical film in the backlight source assembly, the assembly hole is formed in the side edge of the die-casting magnesium alloy rear shell, so that shaking and abnormal sound of the optical film and the light guide plate are prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle display screens, and in particular to a vehicle central control display screen with a narrow bezel and no backlight frame structure. Background Technology

[0002] As consumers demand larger screens and superior visual experiences, in-vehicle displays are increasingly adopting narrow bezel designs. Narrow bezels not only make the screen look more modern and premium, but also provide a wider field of view, enhancing the driving experience. They offer a larger viewing area, optimize the display's appearance, and improve the usability and user experience of in-vehicle displays. By reducing bezel width, the display can provide more screen space, making information presentation richer and more intuitive.

[0003] Traditional automotive displays typically use a snap-fit ​​method to fix a metal base to a plastic frame. In pursuit of a narrow bezel, the cross-sectional width of the frame is significantly compressed, resulting in insufficient mechanical strength and a susceptibility to warping and deformation. For example, plastic frames are prone to warping at the edges under high temperatures or prolonged vibration, which can lead to loosening of the display components or even malfunction. Furthermore, traditional frames rely on backlight modules and multiple layers of optical films for support, resulting in a complex overall structure and increased thickness, making it difficult to meet ultra-thin design requirements.

[0004] Traditional automotive display backlights consist of components such as a frame, light guide plate, reflective film, brightness enhancement film, and light-diffusing film. The frame is used to secure these components and prevent rattling and shaking during transportation. However, because the frame is made of plastic, friction during assembly and vibration can generate debris at the edges, affecting display uniformity. Foreign matter has become a major problem in the backlight industry. Furthermore, with increasing competition within the automotive industry, component manufacturers are facing growing cost pressures. The frame not only increases product costs but also easily generates foreign matter, leading to a high scrap rate for backlights. Solutions include reducing the number of components through an integrated glue-and-iron structure, optimizing the light guide plate positioning protrusions to replace the frame for fixation, and reducing the risk of foreign matter intrusion through a frameless backlight module design. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] To achieve the above objectives, this utility model proposes a vehicle-mounted central control display screen with a narrow bezel and no backlight frame, comprising a display screen assembly, a polyurethane hot melt adhesive, a backlight assembly, a printed circuit board, and a plastic back cover arranged sequentially from front to back. The polyurethane hot melt adhesive is disposed between the display screen assembly and the backlight assembly; the polyurethane hot melt adhesive is sprayed around the backlight assembly; the printed circuit board is disposed on the backlight assembly; and the plastic back cover connects the printed circuit board and the backlight assembly.

[0007] In addition, the vehicle-mounted central control display screen with a narrow bezel and no backlight frame structure proposed in the above application may also have the following additional technical features:

[0008] Specifically, the display assembly includes a glass cover, a liquid optical adhesive, and a display screen, wherein the glass cover and the display screen are bonded together by UV-activated curing of the liquid optical adhesive.

[0009] Specifically, the backlight assembly includes a die-cast magnesium alloy back shell, a reflective film, a light guide plate, a lamp strip, a thermally conductive tape, a brightness enhancement film, and a light-diffusing film. The die-cast magnesium alloy back shell has mounting holes on its side. The reflective film, the light guide plate, the lamp strip, the thermally conductive tape, the brightness enhancement film, and the light-diffusing film are installed inside the die-cast magnesium alloy back shell by screws that mate with the mounting holes.

[0010] Specifically, the die-cast magnesium alloy back cover material is magnesium alloy formed by semi-solid die casting, and the assembly hole is surrounded by light-shielding tape, which is fixed to the side of the die-cast magnesium alloy back cover.

[0011] Specifically, the thermally conductive tape has double-sided adhesive backing, and the thermally conductive tape connects the light strip and the die-cast magnesium alloy back cover respectively.

[0012] Specifically, the printed circuit board is screwless and sandwiched between the plastic back cover and the die-cast magnesium alloy back cover.

[0013] In summary, this utility model provides a vehicle-mounted central control display screen with a narrow bezel and no backlight frame. The beneficial effects of this utility model are:

[0014] 1. To reduce the cost of the backlight assembly, this patent employs a frameless design. The die-cast magnesium alloy back cover has mounting holes on its side. The reflective film, light guide plate, brightness enhancement film, and light-diffusing film are fixed inside the die-cast magnesium alloy back cover through these mounting holes. To prevent light leakage, light-shielding tape is used to secure the mounting holes to the side of the die-cast magnesium alloy back cover. This frameless design reduces material costs while further minimizing the generation of foreign matter, thus improving product yield.

[0015] 2. This patented backlight adopts a frameless structure design, enabling a narrow bezel design. Structural adhesive is directly sprayed onto the perimeter of the die-cast magnesium alloy back cover of the backlight via an electronic spray valve, bonding it to the glass cover of the display module, thus achieving automated production. This product design allows for automated production by a single person from incoming materials to the final product, significantly improving production efficiency.

[0016] 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

[0017] 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:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the backlight assembly structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the glass cover plate connection structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the die-cast magnesium alloy rear shell connection structure of this utility model.

[0022] As shown in the figure: 1. Display screen assembly; 2. Polyurethane hot melt adhesive; 3. Backlight assembly; 4. Printed circuit board; 5. Plastic back cover; 6. Glass cover; 7. Liquid optical adhesive; 8. Display screen; 9. Die-cast magnesium alloy back cover; 10. Reflective film; 11. Light guide plate; 12. LED strip; 13. Thermal conductive tape; 14. Brightness enhancement film; 15. Light diffusion film; 16. Assembly hole; 17. Light-shielding tape. Detailed Implementation

[0023] 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.

[0024] The following description, in conjunction with the accompanying drawings, describes a vehicle-mounted central control display screen with a narrow bezel and no backlight frame structure, according to an embodiment of the present invention.

[0025] like Figure 1-4As shown in the figure, a vehicle central control display screen with a narrow bezel and no backlight frame structure according to an embodiment of the present utility model includes a display screen assembly 1, a polyurethane hot melt adhesive 2, a backlight assembly 3, a printed circuit board 4, and a plastic back cover 5 arranged sequentially from front to back.

[0026] Among them, polyurethane hot melt adhesive 2 is provided between the display screen assembly 1 and the backlight assembly 3. The polyurethane hot melt adhesive 2 is sprayed around the backlight assembly 3. The printed circuit board 4 is set on the backlight assembly 3. The plastic back cover 5 connects the printed circuit board 4 and the backlight assembly 3.

[0027] It should be noted that the polyurethane hot melt adhesive 2 is sprayed around the backlight assembly 3 through a screw valve. The screw valve is an existing technology. The automatic spraying through the screw valve ensures the dispensing accuracy and achieves narrow bezel dispensing.

[0028] In one embodiment of this utility model, such as Figure 1 As shown, the display assembly 1 includes a glass cover plate 6, a liquid optical adhesive 7, and a display screen 8.

[0029] The glass cover 6 and the display screen 8 are bonded together by UV-activated curing of liquid optical adhesive 7.

[0030] It should be noted that liquid optical adhesive 7 is filled between the glass cover plate 6 and the display screen 8, and the display screen assembly 1 is formed by UV activation and bonding.

[0031] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the backlight assembly 3 includes a die-cast magnesium alloy back shell 9, a reflective film 10, a light guide plate 11, a light strip 12, a thermally conductive tape 13, a brightness enhancement film 14, and a light diffusion film 15.

[0032] The die-cast magnesium alloy back cover 9 has an assembly hole 16 on its side. The reflective film 10, light guide plate 11, lamp strip 12, heat-conducting tape 13, brightness enhancement film 14 and light-diffusing film 15 are installed in the die-cast magnesium alloy back cover 9 by screws that mate with the assembly hole 16.

[0033] It should be noted that, in order to reduce costs, the backlight assembly 3 adopts a frameless structure design.

[0034] In one embodiment of this utility model, such as Figure 4 As shown, the die-cast magnesium alloy back cover 9 is made of magnesium alloy through semi-solid die casting. The assembly hole 16 is surrounded by a light-shielding tape 17, which is fixed to the side of the die-cast magnesium alloy back cover 9.

[0035] It should be noted that the die-cast magnesium alloy back shell 9 is prepared by semi-solid die casting of magnesium alloy, which ensures that the die-cast magnesium alloy back shell 9 has good strength and thermal conductivity. The whole machine mounting structure is directly integrally formed on the back of the die-cast magnesium alloy back shell 9, which can effectively improve the overall strength and prevent abnormal noise and uneven display during vibration.

[0036] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the thermally conductive tape 13 has double-sided adhesive backing and connects the light strip 12 and the die-cast magnesium alloy back cover 9 respectively.

[0037] It should be noted that the thermally conductive tape 13 is first assembled with the light strip 12, and then the thermally conductive tape 13 is installed on the inner side of the die-cast magnesium alloy back shell 9. The thermally conductive tape 13 has good thermal conductivity and can quickly transfer the heat of the LED on the light strip 12 through the die-cast magnesium alloy back shell 9.

[0038] In one embodiment of this utility model, such as Figure 1 As shown, the printed circuit board 4 adopts a screwless structure sandwiched between the plastic back cover 5 and the die-cast magnesium alloy back cover 9, which effectively improves production efficiency.

[0039] Specifically, the installation steps for the narrow-bezel, frameless in-vehicle central control display screen are as follows: the reflective film 10, light guide plate 11, brightness enhancement film 14, and light-diffusing film 15 are fixed to the side of the die-cast magnesium alloy rear shell 9 by clips. The side of the die-cast magnesium alloy rear shell 9 has mounting holes 16. To prevent light leakage, light-shielding tape 17 is applied around the mounting holes 16, and the light-shielding tape 17 is adhered to the outside of the die-cast magnesium alloy rear shell 9 using double-sided adhesive. The backlight assembly 3 eliminates the central frame, achieving a narrow bezel design while reducing costs. To secure the optical film within the backlight assembly 3, mounting holes 16 are provided on the side of the die-cast magnesium alloy rear shell 9 to prevent the optical film and light guide plate 11 from shaking or making noise.

[0040] 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. A vehicle-mounted central control display screen with a narrow bezel and no backlight frame, characterized in that, The components, arranged sequentially from front to back, include a display screen assembly (1), polyurethane hot melt adhesive (2), a backlight assembly (3), a printed circuit board (4), and a plastic back cover (5). The polyurethane hot melt adhesive (2) is provided between the display assembly (1) and the backlight assembly (3). The polyurethane hot melt adhesive (2) is sprayed around the backlight assembly (3); The printed circuit board (4) is disposed on the backlight assembly (3); The plastic back cover (5) connects the printed circuit board (4) and the backlight assembly (3).

2. The vehicle-mounted central control display screen with a narrow bezel and no backlight frame structure according to claim 1, characterized in that, The display assembly (1) includes a glass cover (6), liquid optical adhesive (7), and a display screen (8), wherein, The glass cover (6) and the display screen (8) are bonded together by UV-activated curing of the liquid optical adhesive (7).

3. The vehicle-mounted central control display screen with a narrow bezel and no backlight frame structure according to claim 1, characterized in that, The backlight assembly (3) includes a die-cast magnesium alloy back shell (9), a reflective film (10), a light guide plate (11), a light strip (12), a thermally conductive tape (13), a brightness enhancement film (14), and a light diffusion film (15), wherein, The die-cast magnesium alloy rear shell (9) has an assembly hole (16) on its side. The reflective film (10), the light guide plate (11), the lamp strip (12), the thermally conductive tape (13), the brightness enhancement film (14), and the light uniformity film (15) are installed inside the die-cast magnesium alloy back shell (9) by screws that mate with the mounting hole (16).

4. The vehicle-mounted central control display screen with a narrow bezel and no backlight frame structure according to claim 3, characterized in that, The die-cast magnesium alloy back shell (9) is made of magnesium alloy through semi-solid die casting. The assembly hole (16) is surrounded by a light-shielding tape (17), and the light-shielding tape (17) is fixed to the side of the die-cast magnesium alloy back shell (9).

5. A vehicle-mounted central control display screen with a narrow bezel and no backlight frame structure according to claim 3, characterized in that, The thermally conductive tape (13) has double-sided adhesive backing, and the thermally conductive tape (13) connects the light strip (12) and the die-cast magnesium alloy back shell (9) respectively.

6. The vehicle-mounted central control display screen with a narrow bezel and no backlight frame structure according to claim 3, characterized in that, The printed circuit board (4) is screwless and sandwiched between the plastic back shell (5) and the die-cast magnesium alloy back shell (9).

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