Middle-frame-free vehicle-mounted backlight structure and vehicle-mounted display module

Abstract

The utility model discloses a vehicle-mounted backlight structure without a middle frame and a vehicle-mounted display module. The middle-frame-free vehicle-mounted backlight structure comprises a back plate with a containing cavity, a cover plate connected to the back plate and located on one side of an opening of the containing cavity, an LCD panel, dustproof foam, an optical film, a brightness enhancement film, a diffusion film, a light guide plate, a reflector plate and a light bar, and the LCD panel, the dustproof foam, the optical film, the brightness enhancement film, the diffusion film, the light guide plate, the reflector plate and the light bar are arranged in the containing cavity. The LCD panel is connected to the inner side of the cover plate, the dustproof foam is connected to the bottom of the LCD panel, the optical film is located below the dustproof foam, and the distance between the bottom of the dustproof foam and the optical film is 0-0.2 mm; the vehicle-mounted display module comprises the middle-frame-free vehicle-mounted backlight structure. According to the utility model, the dustproof foam is pasted on the glass of the LCD, so that a middle frame for supporting the dustproof foam can be removed, the space is saved, the material is less, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field, concretely relates to a no middle frame vehicle-mounted backlight structure and vehicle-mounted display module. BACKGROUND

[0002] At present, part of automobile display module requires that the frame is narrower and narrower, so that the design space of the middle frame is compressed infinitely, and there is no space to design the position of the middle frame. At present, a new structure of backlight needs to be designed, the middle frame is removed, and the problems of supporting dustproof foam and preventing the film from moving upward and rubbing the polarizing plate of the LCD are solved. UTILITY MODEL CONTENTS

[0003] In order to realize the purpose of the background art, the utility model provides a no middle frame vehicle-mounted backlight structure and vehicle-mounted display module, which pastes the dustproof foam to the glass of the LCD. In this way, the middle frame supporting the dustproof foam can be removed to save space, reduce materials and reduce costs.

[0004] On the one hand, the utility model provides a basic technical scheme:

[0005] A no middle frame vehicle-mounted backlight structure, comprising a back plate having a containing cavity, a cover plate connected to the back plate on one side of the containing cavity opening, and an LCD panel, dustproof foam, optical film, light enhancement sheet, diffusion sheet, light guide plate, reflective sheet and lamp strip arranged in the containing cavity, the LCD panel comprising liquid crystal glass and polarizing plates arranged on both sides of the liquid crystal glass, the LCD panel being connected to the inner side of the cover plate, the dustproof foam being connected to the bottom of the LCD panel, the optical film being located below the dustproof foam, and the distance between the bottom of the dustproof foam and the optical film being 0-0.2mm.

[0006] As a further improvement of the above technical scheme, the lamp strip is an LED lamp bead, and the LED lamp bead is connected to one side of the containing cavity.

[0007] As a further improvement of the above technical scheme, one side of the light guide plate faces the LED lamp bead, and the reflective sheet surrounds the other three side surfaces and the bottom surface of the light guide plate.

[0008] As a further improvement of the above technical scheme, on the side close to the LED lamp bead, the top of the dustproof foam and the LCD panel are bonded by double-sided tape, and the bottom of the dustproof foam and the back plate are bonded by double-sided tape.

[0009] As a further improvement of the above technical scheme, on the side away from the LED lamp bead, the cover plate and the back plate are bonded by VHB tape, and the dustproof foam and the LCD panel are bonded by double-sided tape.

[0010] As a further improvement of the above technical solution, the light enhancement sheet comprises an upper light enhancement sheet and a lower light enhancement sheet arranged in superposition.

[0011] As a further improvement of the above technical solution, the LCD panel, the optical film sheet, the upper light enhancement sheet, the lower light enhancement sheet, the diffusion sheet, the light guide plate and the reflective sheet in the accommodating cavity are sequentially arranged from top to bottom.

[0012] As a further improvement of the above technical solution, the optical film sheet is a privacy film sheet.

[0013] As a further improvement of the above technical solution, the optical film sheet is a DBEF film sheet.

[0014] In another aspect, the utility model also provides a technical scheme:

[0015] A vehicle-mounted display module comprises the frameless vehicle-mounted backlight structure in the above technical solution.

[0016] The utility model has the advantages of:

[0017] The backlight structure of the utility model removes the original middle iron frame (and removes the fixing adhesive tape and assembly buckle of the middle iron frame), thereby saving space, reducing materials and lowering cost, and meeting the design of a narrower and narrower frame and avoiding abnormality caused by deformation of the middle iron frame, powder dust scraped by the middle iron frame and bottom shell assembly and powder dust caused by friction between the middle iron frame and the film sheet.

[0018] In the utility model, the dustproof foam is attached to the LCD panel, the gap between the original dustproof foam and the LCD panel is adjusted to the gap between the dustproof foam and the backlight film sheet, the width of the gap is 0-0.2 mm, the dustproof effect is ensured, and the LCD panel and the optical film sheet are kept apart in the vertical direction, thereby avoiding contact and friction between the optical film sheet and the polarizer of the LCD panel when the optical film sheet jumps upward, and preventing foreign matter or damage to the polarizer. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described below in combination with the drawings and examples.

[0020] Fig. 1 is an assembly schematic view of the frameless vehicle-mounted backlight structure of the utility model example;

[0021] Fig. 2 is a partial sectional view of the frameless vehicle-mounted backlight structure of the utility model example on the light source side;

[0022] Fig. 3 is a partial sectional view of the frameless vehicle-mounted backlight structure of the utility model example on the opposite side of the light source or the left and right sides of the light source.

[0023] Reference numerals: 1. Backplate; 2. Cover plate; 3. LCD panel; 4. First dustproof foam; 5. Optical film; 6. Brightness enhancement film; 7. Diffuser film; 8. Light guide plate; 9. Reflective sheet; 10. LED beads; 11. Second dustproof foam; 12. VHB tape; 13. Double-sided tape. Detailed Implementation

[0024] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0025] Reference Figs. 1-3 This utility model provides a frameless automotive backlight structure, including a back plate 1, a cover plate 2, an LCD panel 3, dustproof foam, an optical film 5, a brightness enhancement film 6, a diffuser 7, a light guide plate 8, a reflector 9, and a light strip. The back plate 1 adopts an aluminum frame structure with a receiving cavity. The cover plate 2 is connected to the back plate 1 and located on one side of the receiving cavity opening. The LCD panel 3 includes liquid crystal glass and polarizers disposed on both sides of the liquid crystal glass. The LCD panel 3 is connected to the inner side of the cover plate 2. On the side, the LCD panel 3, dustproof foam, optical film 5, brightness enhancement film 6, diffuser 7, light guide plate 8, reflector 9, and lamp strip are all disposed within the receiving cavity, and the LCD panel 3, optical film 5, brightness enhancement film 6, diffuser 7, light guide plate 8, and reflector 9 are arranged sequentially from top to bottom. The dustproof foam is connected to the bottom of the LCD panel 3, and the optical film 5 is located below the dustproof foam, with a distance of 0-0.2mm between the bottom of the dustproof foam and the optical film 5.

[0026] Compared to existing backlight structures, this embodiment removes the central iron frame (and also removes the fixing tape and assembly buckles used to attach the central iron frame), in order to save space, use less material, and reduce costs. This not only meets the design requirements for increasingly narrow bezels, but also avoids abnormalities caused by deformation of the central iron frame, powder scraping from the central iron frame and the bottom shell, and powder friction between the central iron frame and the diaphragm.

[0027] In this embodiment, the dustproof foam is attached to the LCD panel 3, and the original gap between the dustproof foam and the LCD panel 3 is adjusted to the gap between the dustproof foam and the backlight film. The width of the gap is 0-0.2mm to ensure its dustproof function. Through this design, the LCD panel 3 and the optical film 5 are kept in a sufficient gap in the vertical direction to avoid the optical film 5 from contacting and rubbing against the polarizer of the LCD panel 3 when it jumps, which could cause abnormalities or damage to the polarizer.

[0028] In this embodiment, the light strip is an LED bead 10, which is connected to one side of the receiving cavity (this side is the light source side). One side of the light guide plate 8 faces the LED bead 10, and the reflective sheet 9 surrounds the other three sides and the bottom surface of the light guide plate 8. Thus, the light guide plate 8 guides the direction of light propagation, allowing the optical fibers of the LED bead 10 to be uniformly emitted from the front of the light guide plate 8, providing uniform backlight to the LCD panel 3. The reflective sheet 9 also reflects light leaking from the bottom of the light guide plate 8 back into the light guide plate 8, improving the overall brightness of the backlight structure. Since the light guide plate 8 cannot completely prevent light from propagating downwards, some light will be lost through the bottom of the light guide plate 8. The reflective sheet 9, with its excellent light reflection properties, reflects this lost light back to the light guide plate 8, allowing the light to be reused and helping to improve the overall brightness of the backlight module.

[0029] In this embodiment, the dustproof foam includes a first dustproof foam 4 and a second dustproof foam 11. The backlight structure is located on the side of the LED bead 10 (light source side). The top of the second dustproof foam 11 is bonded to the LCD panel 3 with double-sided tape 13, and the bottom of the second dustproof foam 11 is bonded to the back plate 1 with double-sided tape 13. The backlight structure is located away from the LED beads 10 on one side (opposite to the light source and on both sides of the light source). The cover plate 2 and the back plate 1 are bonded together with VHB tape 12, which can firmly bond them together and play a role in dust prevention and shock absorption. The first dustproof foam 4 is bonded to the liquid crystal glass of the LCD panel 3 with double-sided tape 13. The height of the first dustproof foam 4, the second dustproof foam 11 and the double-sided tape 13 after being bonded together is 0.2 or more, preferably 0.4 or more, so that there is a sufficient gap between the optical film 5 and the polarizer of the LCD panel 3 in the vertical direction, and prevents the optical film 5 from moving upward and rubbing against the polarizer of the LCD panel 3 when it jumps, which would cause abnormal problems.

[0030] In some embodiments, the brightness enhancement film 6 includes a middle brightness enhancement film 6 and a lower brightness enhancement film 6 stacked vertically. The lower brightness enhancement film 6 processes the light emitted from the light guide plate 8 before transmitting the light to the LCD panel 3. Adding a middle brightness enhancement film 6 as needed can converge the light guided by the light guide plate 8, improving the brightness and contrast of the LCD panel 3, enhancing the visual experience, and saving energy.

[0031] In some embodiments, the optical film 5 is a privacy film to prevent others from peeping at the screen content of the vehicle display device from the side.

[0032] In some embodiments, the optical film 5 is a DBEF film, which can provide a stable brightening effect in complex vehicle environments, ensuring that drivers and passengers can clearly see display information, such as navigation information and vehicle status information, under various lighting conditions.

[0033] An embodiment of this utility model also provides an in-vehicle display module, including the above-mentioned frameless in-vehicle backlight structure, such an in-vehicle display module has a narrower bezel.

[0034] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A frameless vehicle-mounted backlight structure, characterized in that: The device includes a back plate with a receiving cavity, a cover plate connected to the back plate on one side of the receiving cavity opening, and an LCD panel, dustproof foam, optical film, brightness enhancement film, diffuser film, light guide plate, reflector film, and lamp strip disposed within the receiving cavity. The LCD panel includes liquid crystal glass and polarizers disposed on both sides of the liquid crystal glass. The LCD panel is connected to the inside of the cover plate. The dustproof foam is connected to the bottom of the LCD panel. The optical film is located below the dustproof foam, and the distance between the bottom of the dustproof foam and the optical film is 0-0.2 mm.

2. The frameless vehicle backlight structure according to claim 1, characterized in that: The light strip is an LED light bead, and the LED light bead is connected to one side of the receiving cavity.

3. The frameless vehicle backlight structure according to claim 2, characterized in that: One side of the light guide plate faces the LED beads, and the reflective sheet surrounds the other three sides and the bottom of the light guide plate.

4. The frameless vehicle backlight structure according to claim 2, characterized in that: On the side near the LED beads, the top of the dustproof foam is bonded to the LCD panel with double-sided tape, and the bottom of the dustproof foam is bonded to the back plate with double-sided tape.

5. A frameless vehicle backlight structure according to claim 4, characterized in that: On the side away from the LED beads, the cover plate is bonded to the back plate with VHB tape, and the dustproof foam is bonded to the LCD panel with double-sided tape.

6. The frameless vehicle backlight structure according to claim 1, characterized in that: The brightness enhancement film includes an overlapping middle brightness enhancement film and a lower brightness enhancement film.

7. A frameless vehicle backlight structure according to claim 6, characterized in that: The LCD panel, optical film, intermediate brightness enhancement film, lower brightness enhancement film, diffuser, light guide plate and reflector are arranged sequentially from top to bottom within the cavity.

8. A frameless vehicle backlight structure according to claim 7, characterized in that: The optical film is a privacy film.

9. A frameless vehicle backlight structure according to claim 7, characterized in that: The optical film is a DBEF film.

10. A vehicle-mounted display module, characterized in that: Includes the frameless vehicle backlight structure as described in any one of claims 1-9.

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