Vehicle-mounted die casting backlight module with reflection function

Abstract

The utility model discloses a vehicle-mounted die casting backlight module with a reflection function, which comprises a backlight module, the backlight module comprises a back plate and a middle frame, the back plate is internally provided with a die casting, a light guide plate and a diffusion film, the middle frame is internally provided with a lower brightness enhancement film, an upper brightness enhancement film and a middle metal plate, and the lower brightness enhancement film and the middle metal plate are arranged in the middle frame. A reflecting film is arranged on the contact face of the die casting and the light guide plate, a paint spraying face is arranged outside the reflecting film, the paint spraying face is white high-reflection paint, and the die casting and the reflecting film are combined into an assembly through the paint baking technology, so that the reflecting film does not need to be installed again in the later assembling process of the backlight module. According to the backlight module, the phenomena of extrusion, friction and wrinkles in the installation process of the reflecting film are effectively avoided, through the die casting with the reflection function, the backlight module achieves the original functional characteristics, meanwhile, the cost for later assembly of the reflecting part is omitted, it is guaranteed that the precision of the backlight module is improved, and the stability is more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle-mounted backlight module technical field, concretely is a kind of vehicle-mounted die casting with reflection function backlight module. BACKGROUND

[0002] With the development of intelligent driving and intelligent cockpit technology, the demand for vehicle-mounted display screens is increasing, and the requirements for backlight modules are also increasing. Modern vehicle-mounted backlight modules use advanced optical technology and local dimming technology, such as 2D local dimming technology, to provide better display quality and energy consumption control.

[0003] ‌Vehicle-mounted backlight module‌ is a kind of light source assembly installed on the back of vehicle-mounted display screen, its main function is to provide necessary light for display screen, so that it can normally display images and text. Backlight module is usually composed of light source, light guide plate, reflector, diffuser and prism sheet, etc. Components work together to ensure the brightness and uniformity of the display screen. The main function of vehicle-mounted backlight module is to provide uniform and high-brightness backlight illumination for vehicle-mounted display screen. Vehicle-mounted backlight module can be divided into side-light type and direct type according to the arrangement position of light source. Side-light type backlight module is mainly used for small and medium size liquid crystal display panel, and the overall thickness is reduced to optimize the design.

[0004] According to the authorized announcement number CN 213904016 U, a kind of vehicle-mounted backlight module is disclosed, including back shell, light guide plate, side-in type light bar, diaphragm assembly and middle frame, the side-in type light bar is fixed in back shell, and the light-emitting surface of side-in type light bar faces the side of light guide plate;The light guide plate is arranged in back shell, the diaphragm assembly is arranged on light guide plate, the middle frame is fixed on back shell, and the diaphragm assembly and light guide plate are pressed solid in back shell;The diaphragm assembly is fixed on light guide plate by positioning structure, and is clamped between middle frame and light guide plate by soft rubber pad, and the soft rubber pad is fixed on the back of middle frame.

[0005] The traditional die casting backlight module design, process assembly more paste a reflection film, yield and production efficiency bottleneck is encountered on promotion, reflection film assembly in die casting structure piece, there is friction extrusion white spot risk, film arch wrinkle risk under super high temperature harsh environment, so now need a kind of vehicle-mounted die casting with reflection function backlight module. SUMMARY

[0006] The utility model aims at providing a kind of vehicle-mounted die casting with reflection function backlight module, by the die casting with reflection function of being set, make the backlight module inside save a film, avoid friction and wrinkle, to solve the technical problem mentioned in background art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] The utility model provides a kind of vehicle-mounted die casting self-backlight module with reflection function, including backlight module, the backlight module includes backplate and middle frame, the inside of backplate is equipped with die casting, light guide plate and diffusion film, the inside of middle frame is equipped with lower light-increasing sheet, upper light-increasing sheet and middle sheet metal piece, the contact surface of die casting and light guide plate is provided with reflective film, the outside of reflective film is provided with paint spraying surface.

[0009] Preferably, the paint spraying surface is a white high-reflective paint, and the thickness of the paint spraying surface is 0.5 mm.

[0010] Preferably, the die casting is installed on the upper part of the backplate, the light guide plate is installed on the upper part of the die casting, and the diffusion film is arranged on the upper surface of the light guide plate.

[0011] Preferably, the inside of the middle frame is provided with the lower light-increasing sheet on the upper part of the diffusion film, the upper light-increasing sheet is arranged on the upper part of the lower light-increasing sheet, and the middle sheet metal piece is arranged on the upper part of the upper light-increasing sheet.

[0012] Preferably, the middle part of the backplate is provided with a clamping groove, the side surface of the middle frame is provided with a clamping block corresponding to the clamping groove, and the clamping block is clamped and installed in the inside of the clamping groove.

[0013] Preferably, the inside of the backplate is provided with an extension block, and the die casting, the light guide plate and the diffusion film are provided with notches corresponding to the extension block.

[0014] Preferably, the middle part of the extension block is provided with a positioning groove, and a positioning column is arranged in the middle part of the lower light-increasing sheet, the upper light-increasing sheet and the middle sheet metal piece and penetrates through the positioning groove.

[0015] Preferably, the middle part of the middle frame is provided with a mounting groove, the inside of the mounting groove is filled with foam glue, and the liquid crystal panel is arranged on the upper part of the middle frame.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The die casting and the reflective film are combined into one component through the baking process, so that the backlight module does not need to install the reflective film again during the later assembly, effectively avoiding the phenomenon of wrinkle caused by extrusion and friction of the reflective film during installation, and through the die casting with reflection function, the cost of installing the reflective component in the later assembly is omitted while achieving the original function characteristics, so as to improve the precision of the backlight module and make the stability more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a split schematic diagram of the overall structure of the utility model;

[0020] Figure 3 This is a schematic diagram showing the disassembled installation structure of the restraint strap of this utility model;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the arc-shaped cover of this utility model;

[0022] Figure 5 This is a split view of the installation structure of the limiting platform of this utility model.

[0023] In the diagram: 1. Backlight module; 11. Back plate; 12. Middle frame; 13. Die-cast part; 14. Light guide plate; 15. Diffuser film; 16. Lower brightness enhancement film; 17. Upper brightness enhancement film; 18. Middle sheet metal sheet; 19. Painted surface; 2. Clip groove; 3. Clip block; 4. Extension block; 5. Positioning groove; 6. Positioning post; 7. Foam adhesive; 8. LCD panel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides: a vehicle-mounted die-cast backlight module with built-in reflective function, such as... Figures 1-5 As shown, the backlight module 1 includes a backplate 11 and a middle frame 12. The backplate 11 houses a die-cast part 13, a light guide plate 14, and a diffuser film 15. The middle frame 12 houses a lower light enhancement film 16, an upper light enhancement film 17, and a middle sheet metal sheet 18. A reflective film is provided on the contact surface between the die-cast part 13 and the light guide plate 14. A painted surface 19 is provided on the exterior of the reflective film. The backplate 11 is used to mount other components of the backlight module 1, allowing the die-cast part 13, light guide plate 14, and diffuser film 15 to be mounted. The light plate 14 and the diffusion film 15 are clipped inside the back plate 11. The middle frame 12 is installed on the upper part of the back plate 11 and is used to fix the lower light enhancement sheet 16, the upper light enhancement sheet 17 and the middle sheet metal sheet 18 on the upper part of the diffusion film 15. The painted surface 19 is used to fix the reflective film to the side of the die-cast part 13, so that the die-cast part 13 has its own reflective function. There is no need to install the reflective film inside the backlight assembly 1 again, which effectively avoids the phenomenon of wrinkles caused by squeezing and friction during the installation of the reflective film.

[0026] Preferably, the painted surface 19 is a white high-reflectivity paint with a thickness of 0.05-0.15mm. The white high-reflectivity paint can reflect light to the maximum extent, ensuring that the light utilization rate of the backlight module reaches the optimal level, thereby improving the display brightness and uniformity. The spraying process is simple, easy to achieve mass production, and the thickness is precisely controlled, making it suitable for industrial manufacturing. The coating is uniform and can perfectly adhere to the surface of the die-cast part 13, ensuring the stable performance of the reflective film. The thickness of 0.05-0.15mm can ensure the reflection effect without adding too much weight or occupying extra space, which meets the requirements of vehicle equipment for lightweight and compact design.

[0027] Preferably, the die-cast part 13 is mounted on the upper part of the back plate 11, the light guide plate 14 is mounted on the upper part of the die-cast part 13, and the diffusion film 15 is disposed on the upper surface of the light guide plate 14. The die-cast part 13 serves as a reflective base, which can efficiently reflect light into the light guide plate 14, ensuring maximum light utilization. The light guide plate 14 is located on the upper part of the die-cast part 13, which can evenly distribute the reflected light into the entire backlight module. The diffusion film 15 is disposed on the upper surface of the light guide plate 14, which can further homogenize the light, eliminate hot spots and dark areas, and ensure the uniformity of the display effect.

[0028] Furthermore, a lower brightness enhancement sheet 16 is provided inside the middle frame 12 above the diffuser film 15, an upper brightness enhancement sheet 17 is provided above the lower brightness enhancement sheet 16, and a middle sheet metal sheet 18 is provided above the upper brightness enhancement sheet 17. The lower brightness enhancement sheet 16 and the upper brightness enhancement sheet 17, through the multi-layer brightness enhancement structure, can significantly improve the overall brightness of the backlight module. The superimposed design of the lower brightness enhancement sheet 16 and the upper brightness enhancement sheet 17 can further homogenize the light and eliminate the light unevenness problem that the diffuser film 15 may not completely eliminate.

[0029] Furthermore, a snap-fit ​​groove 2 is provided in the middle of the back panel 11, and a snap-fit ​​block 3 is installed on the side of the middle frame 12 corresponding to the snap-fit ​​groove 2. The snap-fit ​​block 3 is snapped into the inside of the snap-fit ​​groove 2. The design of the snap-fit ​​groove 2 and the snap-fit ​​block 3 makes the assembly process of the back panel 11 and the middle frame 12 simple and quick, without the need for additional screws, and can ensure that the connection between the back panel 11 and the middle frame 12 is stable, preventing loosening or falling off due to vibration or impact in the vehicle environment.

[0030] It is worth noting that an extension block 4 is installed inside the back plate 11. The die-cast part 13, the light guide plate 14 and the diffusion film 15 are provided with notches corresponding to the extension block 4. The extension block 4 serves as a positioning reference, which can ensure that the die-cast part 13, the light guide plate 14 and the diffusion film 15 are accurately aligned during installation, avoiding the decrease in optical performance caused by positional deviation. The notch design and the cooperation with the extension block 4 can effectively prevent the components from shifting or rotating during installation.

[0031] Specifically, a positioning groove 5 is provided in the middle of the extension block 4. A positioning post 6 is installed in the middle of the lower brightening sheet 16, the upper brightening sheet 17 and the middle sheet metal sheet 18 through the positioning groove 5. The positioning groove 5 is used to install the fixing post 6, so that the lower brightening sheet 16, the upper brightening sheet 17 and the middle sheet metal sheet 18 are fixed inside the middle frame 12.

[0032] More specifically, a mounting groove is provided in the middle of the middle frame 12, and the inside of the mounting groove is filled with foam adhesive 7. An LCD panel 8 is mounted on the upper part of the middle frame 12. The mounting groove is used to install the foam adhesive 7 and fix the LCD panel 8 to the upper part of the middle frame 12.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle-mounted die-cast backlight module with built-in reflective function, comprising a backlight module (1), characterized in that: The backlight module (1) includes a back plate (11) and a middle frame (12). The back plate (11) is equipped with a die-cast part (13), a light guide plate (14) and a diffusion film (15). The middle frame (12) is equipped with a lower light enhancement film (16), an upper light enhancement film (17) and a middle sheet metal sheet (18). The contact surface between the die-cast part (13) and the light guide plate (14) is provided with a reflective film. The outside of the reflective film is provided with a painted surface (19).

2. The vehicle-mounted die-cast backlight module with built-in reflective function according to claim 1, characterized in that: The painted surface (19) is a white high-reflectivity paint, and the thickness of the painted surface (19) is 0.05-0.15mm.

3. A vehicle-mounted die-cast backlight module with built-in reflective function according to claim 2, characterized in that: The die-cast part (13) is installed on the upper part of the back plate (11), the light guide plate (14) is installed on the upper part of the die-cast part (13), and the diffusion film (15) is disposed on the upper surface of the light guide plate (14).

4. A vehicle-mounted die-cast backlight module with built-in reflective function according to claim 3, characterized in that: The inner part of the middle frame (12) is provided with a lower brightening sheet (16) above the diffusion film (15), and an upper brightening sheet (17) is provided above the lower brightening sheet (16). A middle sheet metal sheet (18) is provided above the upper brightening sheet (17).

5. A vehicle-mounted die-cast backlight module with built-in reflective function according to claim 4, characterized in that: The back plate (11) has a snap-fit ​​groove (2) in the middle, and the side of the middle frame (12) is fitted with a snap-fit ​​block (3) corresponding to the snap-fit ​​groove (2). The snap-fit ​​block (3) is snap-fitted into the inside of the snap-fit ​​groove (2).

6. A vehicle-mounted die-cast backlight module with built-in reflective function according to claim 5, characterized in that: An extension block (4) is installed inside the back plate (11), and the die-cast part (13), the light guide plate (14) and the diffusion film (15) have notches corresponding to the extension block (4).

7. A vehicle-mounted die-cast backlight module with built-in reflective function according to claim 6, characterized in that: The extension block (4) has a positioning groove (5) in the middle, and a positioning post (6) is installed inside the positioning groove (5) through the lower brightening sheet (16), the upper brightening sheet (17) and the middle sheet metal sheet (18).

8. A vehicle-mounted die-cast backlight module with built-in reflective function according to claim 7, characterized in that: The middle frame (12) has a mounting groove in the middle, the inside of which is filled with foam adhesive (7), and a liquid crystal panel (8) is mounted on the upper part of the middle frame (12).

Images