Vehicle-mounted backlight module

Abstract

The utility model provides a vehicle-mounted backlight module which comprises a hollow rubber frame, a display area is arranged in the rubber frame, a plurality of LEDs are arranged on the side face of the rubber frame in a surrounding mode, a light guide plate is arranged in the display area, a positioning column is arranged on the edge of the light guide plate, the side, close to the display area, of the positioning column is an elliptic curve section, and the side, close to the LEDs, of the positioning column is a straight section. The length of each positioning column is more than two times of the width of the positioning column so as to reduce light leakage near the positioning column, a diffusion film, a brightness enhancement film and a peep-proof film are sequentially arranged on the light guide plate, avoiding spaces matched with the positioning columns are arranged on the diffusion film, the brightness enhancement film and the peep-proof film, a first reflector plate is arranged on the inner side face of the rubber frame, and a second reflector plate is arranged at the bottom of the light guide plate. The first reflector plate and the second reflector plate are used for reflecting light emitted by the LEDs back and forth in the display area so as to improve the display effect of the display area. The vehicle-mounted backlight module provided by the utility model is uniform in display brightness and good in effect.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display preparation, in particular to a vehicle-mounted backlight module. Background Art

[0002] Most of the liquid crystal display devices on the market are backlight type liquid crystal display modules. At present, the automotive industry is developing rapidly, the market demand is increasing, the competition of vehicle-mounted modules is fierce, and the yield of vehicle-mounted backlights affects the quality of products. The backlight takes the display effect of the display area as the main core technology.

[0003] A good backlight display effect can meet the matching of various display screens, the effect of the backlight LED lamp ports is good, the mold design is optimized, and the defects caused by assembly are reduced; however, in the existing vehicle-mounted backlight modules, due to the existence of positioning posts on the light guide plate, strong light bright spots will be generated at the edges of the positioning posts, affecting the overall display effect. Summary of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide a vehicle-mounted backlight module to solve the technical problems existing in the prior art.

[0005] The utility model provides a vehicle-mounted backlight module, which includes a hollow rubber frame. A display area is arranged inside the rubber frame. A plurality of LEDs are arranged around the side surface of the rubber frame, and the LEDs are used to light up the display area. A light guide plate is arranged inside the display area. Positioning posts are arranged on the edge of the light guide plate. The side of the positioning post close to the display area is an elliptical curve segment, and the side of the positioning post close to the LED is a straight segment. The length of the positioning post is more than twice its width. A diffusion film, a brightness enhancement film and a privacy film are sequentially arranged on the light guide plate. Avoidance spaces adapted to the positioning posts are arranged on the diffusion film, the brightness enhancement film and the privacy film. A first reflector is arranged on the inner side surface of the rubber frame, and a second reflector is arranged at the bottom of the light guide plate. The first reflector and the second reflector are used to reflect the light emitted by the LEDs back and forth in the display area to improve the display effect of the display area.

[0006] Preferably, the outer dimension of the light guide plate is smaller than the hollow dimension of the rubber frame, so that a accommodating space is formed between the outer side of the light guide plate and the inner wall of the rubber frame, and the first reflector is arranged in the accommodating space.

[0007] Preferably, a support platform is annularly arranged on the inner wall of the rubber frame, and the inner dimension of the support platform is smaller than the dimension of the light guide plate, so that the support platform supports the bottom edge of the light guide plate.

[0008] Preferably, the bottom area of the positioning post is 4mm 2 -4.5mm 2 .

[0009] Preferably, a buffer section is provided between the elliptical curve section and the straight section of the positioning post, and the buffer section is perpendicular to the straight section.

[0010] Preferably, the diffusion film, the brightness enhancement film, and the anti-peeping film are all fixed by film material fixing glue, and a side edge of the anti-peeping film and the glue frame are bonded with a single-sided edge wrapping glue.

[0011] Preferably, the distance between the positioning post and the edge of the display area is greater than 3.5 mm.

[0012] The beneficial effects of the present utility model are as follows: The in-vehicle backlight module provided by the present utility model includes a hollow glue frame. The middle area of the glue frame is a display area. A plurality of LEDs are provided on the side surface of the glue frame. The light emitted by the LEDs propagates from the outside to the inside to the display area, so that the display area emits light and is visible. A light guide plate is provided in the display area for guiding light. The edge of the light guide plate is provided with positioning posts for facilitating the positioning of the light guide plate. The positioning posts are strip-shaped positioning posts. Specifically, the inner side of the positioning post is an elliptical curve section, and the outer side is a straight section. The length of the positioning post 21 is more than twice its width; on the light guide plate, the straight section is formed on the surface of the positioning post facing the LED surface, reducing the refraction of light when passing through the positioning post, making it difficult for light to directly enter the display area and cause light leakage, forming a display bright spot; further, on the light guide plate, the surface of the positioning post facing the display area is an elliptical curve section, making the light transmitted by the LED not gather but scatter, and not forming a display bright spot in the display area near the positioning post; further, a diffusion film, a brightness enhancement film, and an anti-peeping film are sequentially provided on the light guide plate; the diffusion film and the brightness enhancement film are used to improve the display brightness of the module, and the anti-peeping film is used to prevent the displayed picture from being peeked at from the side. The inner side surface of the glue frame is provided with a first reflector, and the bottom of the light guide plate is provided with a second reflector. The light emitted by the LED can be reflected multiple times in the internal space of the glue frame, and only the light exits from the display area at the top of the glue frame for display.

[0013] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an exploded structural schematic diagram of the in-vehicle backlight module according to an embodiment of the present utility model;

[0015] Figure 2 is Figure 1 a structural schematic diagram of the light guide plate in

[0016] Figure 3 is Figure 2 a partially enlarged structural schematic diagram of part A in

[0017] Figure 4 isFigure 1 Schematic diagram of the structure of the middle rubber frame;

[0018] Figure 5 is Figure 4 Schematic diagram of the locally enlarged structure at position B in the middle.

[0019] Description of main component symbols:

[0020] 10. Rubber frame; 11. Display area; 12. LED; 13. First reflector; 14. Support platform; 20. Light guide plate; 21. Positioning post; 211. Elliptical curve segment; 212. Straight segment; 213. Buffer segment; 22. Diffusion film; 23. Brightness enhancement film; 24. Anti-peeking film; 25. Second reflector.

[0021] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific embodiments

[0022] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Specifically, such as Figures 1 to 5As shown in the figure, in the embodiment of the present utility model, a vehicle-mounted backlight module provided in this embodiment includes a hollow glue frame 10. A display area 11 is provided inside the glue frame 10. A light guide plate 20 is provided inside the display area 11. A number of LEDs 12 are arranged around the side surface of the glue frame 10. The LEDs 12 are used to light up the display area. A positioning post 21 is provided at the edge of the light guide plate 20. One side of the positioning post 21 close to the display area 11 is an elliptical curve segment 211, and one side of the positioning post 21 close to the LEDs 12 is a straight segment 212. The length of the positioning post 21 is more than twice its width to reduce light leakage near the positioning post 21. A diffusion film 22, a brightness enhancement film 23, and an anti-peeking film 24 are sequentially provided on the light guide plate 20. Avoidance spaces adapted to the positioning post 21 are provided on the diffusion film 22, the brightness enhancement film 23, and the anti-peeking film 24. A first reflective sheet 13 is arranged on the inner side surface of the glue frame 10. A second reflective sheet 25 is provided at the bottom of the light guide plate 20. The first reflective sheet 13 and the second reflective sheet 25 are used to reflect the light emitted by the LEDs 12 back and forth inside the display area 11 to improve the display effect of the display area 11.

[0026] Optionally, in this embodiment, the vehicle-mounted backlight module includes a hollow glue frame 10. The middle area of the glue frame 10 is the display area. A number of LEDs are provided on the side surface of the glue frame 10. The light emitted by the LEDs propagates from the outside to the inside to the display area 11, so that the display area 11 emits light and is visible. A light guide plate 20 is provided inside the display area 11. The light guide plate 20 is used for light guiding. A positioning post 21 is provided at the edge of the light guide plate 20 to facilitate the positioning of the light guide plate 20. The positioning post 21 is a long strip-shaped positioning post. Specifically, the inner side of the positioning post 21 is an elliptical curve segment 211, and the outer side is a straight segment 212. The length of the positioning post 21 is more than twice its width; on the light guide plate 20, the side of the positioning post 21 facing the LEDs is a straight segment, reducing the refraction of light when passing through the positioning post, making it difficult for light to directly enter the display area and cause light leakage to form display bright spots; further, the side of the positioning post 21 on the light guide plate 20 facing the display area is an elliptical curve segment, making the light transmitted by the LEDs not gather but scatter, and not forming display bright spots in the display area near the positioning post.

[0027] Optionally, in this embodiment, a diffusion film 22, a brightness enhancement film 23, and an anti-peeking film 24 are sequentially provided on the light guide plate 20; the diffusion film 22 and the brightness enhancement film 23 are used to improve the display brightness of the module, and the anti-peeking film 24 is used to prevent the displayed picture from being peeked from the side. A first reflective sheet 13 is arranged on the inner side surface of the glue frame 10. A second reflective sheet 25 is provided at the bottom of the light guide plate 20. The light emitted by the LEDs 12 can be reflected multiple times inside the internal space of the glue frame 10, and only the display area at the top of the glue frame emits light for display, and the other surfaces of the glue frame do not emit light.

[0028] Optionally, in this embodiment, the outer dimension of the light guide plate 20 is smaller than the hollow dimension of the glue frame 10, so that a receiving space is formed between the outer side of the light guide plate and the inner wall of the glue frame. The first reflective sheet 13 is arranged in the receiving space. The first reflective sheet 13 can be adhered to the side wall of the glue frame 10. The light guide plate 20 is a rectangular light guide plate. Therefore, the positioning posts 21 are also set to be strip-shaped, which is beneficial to increasing the structural strength of the positioning posts 21, facilitating mechanical or vibration experiments on the whole vehicle, and preventing the positioning posts from being broken in subsequent experiments. Optionally, a support platform 14 is provided around the inner wall of the glue frame 10. The inner dimension of the support platform 14 is smaller than the dimension of the light guide plate 20, so that the support platform 14 supports the bottom edge of the light guide plate 20.

[0029] Optionally, in this embodiment, the bottom area of the positioning post 21 is 4 mm 2 -4.5 mm 2 ; a buffer section 213 is provided between the elliptical curve section 211 and the straight section 212 of the positioning post 21. The buffer section 213 is perpendicular to the straight section 212. The diffusion film 22, the brightness enhancement film 23, and the anti-peep film 24 are all fixed by film fixing glue. A side of the anti-peep film 24 is adhered to the glue frame 10 with a single-sided edge glue. The edge dimension between the positioning post 21 and the display area 11 is greater than 3.5 mm. Compared with conventional positioning posts, the refracted light is farther from the display area, and even if some light penetrates, it will not affect the display area.

[0030] In summary, the in-vehicle backlight module provided in this embodiment includes a hollow glue frame 10. The middle area of the glue frame 10 is the display area. A plurality of LEDs are provided on the side of the glue frame 10. The light emitted by the LEDs propagates from the outside to the inside to the display area 11, so that the display area 11 emits light and is visible. A light guide plate 20 is provided in the display area 11 for guiding light. Positioning posts 21 are provided at the edges of the light guide plate 20 to facilitate positioning of the light guide plate 20. The positioning posts 21 are strip-shaped positioning posts. Specifically, the inner side of the positioning post 21 is an elliptical curve section 211, and the outer side is a straight section 212. The length of the positioning post 21 is more than twice its width. On the light guide plate 20, the straight section of the positioning post 21 faces the LED surface, reducing the refraction of light when passing through the positioning post, making it difficult for light to directly enter the display area and cause light leakage to form display bright spots. Further, on the light guide plate 20, the elliptical curve section of the positioning post 21 faces the display area surface, so that the light transmitted by the LEDs does not gather and is scattered, and no display bright spots are formed in the display area near the positioning post. Further, the diffusion film 22 and the brightness enhancement film 23 are used to improve the display brightness of the module, and the anti-peep film 24 is used to prevent the displayed image from being peeked at from the side. The first reflective sheet 13 is arranged on the inner side surface of the glue frame 10, and the second reflective sheet 25 is provided at the bottom of the light guide plate 20. The light emitted by the LED 12 can be reflected multiple times in the internal space of the glue frame 10, and only the light exits from the top display area of the glue frame for display.

[0031] It should be noted that the above implementation process is only to illustrate the feasibility of the present application. However, this does not mean that there are only the above several implementation processes for the in-vehicle backlight module of the present application. On the contrary, as long as the in-vehicle backlight module of the present application can be implemented, it can be included in the feasible implementation solutions of the present application.

[0032] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0033] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A vehicle-mounted backlight module, characterized in that, It includes a hollow rubber frame. A display area is provided inside the rubber frame. Several LEDs are arranged around the side of the rubber frame. The LEDs are used to light up the display area. A light guide plate is provided inside the display area. Positioning posts are provided at the edge of the light guide plate. The side of the positioning post close to the display area is an elliptical curve segment, and the side of the positioning post close to the LEDs is a straight segment. The length of the positioning post is more than twice its width. A diffusion film, a brightness enhancement film and a privacy film are sequentially provided on the light guide plate. Avoidance spaces adapted to the positioning posts are provided on the diffusion film, the brightness enhancement film and the privacy film. A first reflective sheet is arranged on the inner side surface of the rubber frame. A second reflective sheet is provided at the bottom of the light guide plate. The first reflective sheet and the second reflective sheet are used to reflect the light emitted by the LEDs back and forth inside the display area to improve the display effect of the display area.

2. The in-vehicle backlight module according to claim 1, wherein The outer dimension of the light guide plate is smaller than the hollow dimension of the rubber frame, so that a receiving space is formed between the outer side of the light guide plate and the inner wall of the rubber frame. The first reflective sheet is arranged in the receiving space.

3. The in-vehicle backlight module according to claim 1, characterized in that, A support platform is annularly provided on the inner wall of the rubber frame. The inner dimension of the support platform is smaller than the dimension of the light guide plate, so that the support platform supports the bottom edge of the light guide plate.

4. The vehicle-mounted backlight module according to claim 1, wherein, The bottom area of the positioning post is 4 mm 2 -4.5 mm 2 .

5. The vehicle-mounted backlight module according to claim 1, wherein A buffer segment is provided between the elliptical curve segment and the straight segment of the positioning post. The buffer segment is perpendicular to the straight segment.

6. The vehicle-mounted backlight module according to claim 1, characterized in that, The diffusion film, the brightness enhancement film and the privacy film are all fixed by film material fixing glue. A side of the privacy film and the rubber frame are bonded with a side-edge single-sided glue.

7. The vehicle-mounted backlight module according to claim 1, wherein, The edge dimension of the positioning post from the edge of the display area is greater than 3.5 mm.

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