Vehicle-mounted backlight module with narrow frame and vehicle-mounted display device

Abstract

The utility model provides a narrow frame's vehicle-mounted backlight module, including lower frame, reflecting film, light guide plate and optical membrane, lower frame includes bottom plate and side frame, side frame is fixedly connected with the bottom plate and forms the accommodation cavity, side frame includes first surface and second surface that are arranged opposite to each other, the first surface is provided in the accommodation cavity, the second surface is provided in the accommodation cavity, the reflecting film is provided in the first surface, and the light guide plate is provided in the second surface. The first surface is recessed towards the second surface to form a groove, the groove is communicated with the accommodating cavity, the reflecting film, the light guide plate and the optical film are respectively arranged in the accommodating cavity, and the groove can provide an expansion space for the reflecting film, the light guide plate and the optical film. According to the vehicle-mounted backlight module with the narrow frame, the film arching phenomenon can be avoided, and the product quality is improved. The utility model further relates to a vehicle-mounted display device.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to a vehicle-mounted backlight module with a narrow frame and a vehicle-mounted display device. Background Art

[0002] In recent years, with the continuous improvement of people's awareness of driving safety, car displays have developed rapidly in the field of automotive electronics. It can provide real-time monitoring and display of the environment outside the car for drivers and passengers, provide protection for safe driving, and has become one of the indispensable equipment for traffic safety. Automobile manufacturers have higher and higher requirements for the quality of car displays, and at the same time, they have also put forward higher requirements for car displays in terms of narrow borders and high-temperature film supply.

[0003] A traditional vehicle-mounted backlight module includes a die-casting, a reflective film, a light guide plate, an optical film and a middle frame. The die-casting is provided with a accommodating cavity, in which the reflective film, the light guide plate and the optical film are arranged. The middle frame is fixedly connected to the die-casting. When the vehicle-mounted backlight module is subjected to three comprehensive tests, the reflective film, the light guide plate and the optical film will swell to varying degrees. When the film swells, the edge of the reflective film, the light guide plate or the optical film will abut against the inner wall of the side frame, resulting in a film arch, which affects the quality of the vehicle-mounted backlight module. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a vehicle-mounted backlight module with a narrow frame, which can solve the problems existing in the prior art, avoid the film arch phenomenon, and improve the quality of the product.

[0005] The utility model provides a vehicle-mounted backlight module with a narrow frame, comprising a lower frame, a reflective film, a light guide plate and an optical film, wherein the lower frame comprises a bottom plate and a side frame, the side frame is fixedly connected to the bottom plate and forms a receiving cavity, the side frame comprises a first surface and a second surface which are arranged opposite to each other, the first surface is arranged in the receiving cavity, the first surface is recessed in a direction close to the second surface to form a groove, the groove is connected to the receiving cavity, the reflective film, the light guide plate and the optical film are respectively arranged in the receiving cavity, and the groove can provide expansion space for the reflective film, the light guide plate and the optical film.

[0006] In one embodiment, the side frame includes a first side panel, a second side panel and a third side panel, and a fourth side panel that are relatively arranged. The first side panel and the second side panel are fixedly connected to the third side panel and the fourth side panel, respectively, and the groove is provided on the second side panel, the third side panel and the fourth side panel.

[0007] In one embodiment, the groove includes a top surface and a side wall, the top surface is fixedly connected to the side wall, the side wall is fixedly connected to the inner surface of the bottom plate, and the distance between the top surface and the inner surface is 3.0 mm to 3.6 mm.

[0008] In one embodiment, the distance between the first surface and the side wall is 0.2 mm to 0.8 mm.

[0009] In one embodiment, the distance between the light guide plate and the side wall is 0 mm to 1.7 mm.

[0010] In one embodiment, the narrow-frame vehicle-mounted backlight module further includes a buffer layer, and the buffer layer is fixedly connected to the side wall.

[0011] In one embodiment, the narrow-frame vehicle-mounted backlight module further includes a light bar, and the light bar is fixedly connected to the first side panel.

[0012] In one embodiment, the narrow-frame vehicle-mounted backlight module further includes a middle frame and a plurality of dust-proof adhesives, the middle frame is fixedly connected to the lower frame, and the dust-proof adhesives are connected between the middle frame and the lower frame.

[0013] In one embodiment, the narrow-frame vehicle-mounted backlight module further includes foam glue, which is connected to an end of the middle frame away from the lower frame, and is used for buffering and fixing the display screen.

[0014] The utility model also relates to a vehicle-mounted display device, comprising the above-mentioned vehicle-mounted backlight module with a narrow frame.

[0015] The vehicle-mounted backlight module of the utility model is provided with a groove on the side wall of the lower frame. When the vehicle-mounted backlight module is subjected to three comprehensive tests or used under high temperature conditions, the reflective film, the light guide plate and the optical film will swell to varying degrees. The groove can provide expansion space for them, thereby preventing the film from abutting against the lower frame after expansion and causing a film arch, thereby improving the product quality of the vehicle-mounted backlight module and providing a better display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the lower frame of the utility model;

[0018] Figure 2It is a partial cross-sectional structural schematic diagram of the vehicle-mounted backlight module of the utility model;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the vehicle-mounted backlight module of the utility model;

[0020] Description of the accompanying drawings: groove-101; top surface-1011; side wall-1012; accommodating cavity-102; lower frame-11; bottom plate-111; side frame-112; first side plate-1121; second side plate-1122; third side plate-1123; fourth side plate-1124; first surface-112a; second surface-112b; reflective film-12; light guide plate-13; optical film-14; diffusion film-141; brightness enhancement film-142; brightness enhancement film-143; light strip-15; dust-proof glue-16; foam glue-17; middle frame-18.

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0025] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0026] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0027] like Figure 1 and Figure 2 As shown, the narrow-frame vehicle backlight module includes a lower frame 11, a reflective film 12, a light guide plate 13 and an optical film 14. The lower frame 11 includes a bottom plate 111 and a side frame 112. The side frame 112 is fixedly connected to the bottom plate 111 and forms a receiving cavity 102. The side frame 112 includes a first surface 112a and a second surface 112b that are oppositely arranged. The first surface 112a is arranged in the receiving cavity 102. The first surface 112a is recessed in a direction close to the second surface 112b to form a groove 101. The groove 101 is connected to the receiving cavity 102. The reflective film 12, the light guide plate 13 and the optical film 14 are respectively arranged in the receiving cavity 102. The groove 101 can provide expansion space for the reflective film 12, the light guide plate 13 and the optical film 14.

[0028] The vehicle-mounted backlight module of the utility model is provided with a groove 101 on the side wall 1012 of the lower frame 11. When the vehicle-mounted backlight module is subjected to three comprehensive tests or used under high temperature conditions, the reflective film 12, the light guide plate 13 and the optical film 14 will swell to varying degrees. The groove 101 can provide expansion space for them, thereby preventing the film from abutting against the lower frame 11 after expansion and causing a film arch, thereby improving the product quality of the vehicle-mounted backlight module and providing a better display effect.

[0029] Preferably, the side frame 112 includes a first side panel 1121 and a second side panel 1122 that are arranged opposite to each other, and a third side panel 1123 and a fourth side panel 1124 that are arranged opposite to each other. The first side panel 1121 and the second side panel 1122 are fixedly connected to the third side panel 1123 and the fourth side panel 1124, respectively. The groove 101 is provided on the second side panel 1122, the third side panel 1123 and the fourth side panel 1124. The vehicle-mounted backlight module with a narrow frame also includes a light bar 15, and the light bar 15 is fixedly connected to the first side panel 1121. In this embodiment, the light bar 15 includes a flexible circuit board and a plurality of LED lights, and the plurality of LED lights are electrically connected to the flexible circuit board. Each LED light is arranged along the length direction of the flexible circuit board, and the flexible circuit board is fixedly connected to the first side panel 1121 by a heat-conductive double-sided adhesive.

[0030] Preferably, the groove 101 includes a top surface 1011 and a side wall 1012, the top surface 1011 is fixedly connected to the side wall 1012, the side wall 1012 is fixedly connected to the inner surface of the bottom plate 111, and the distance between the top surface 1011 and the inner surface is 3.0 mm to 3.6 mm, preferably 3 mm, 3.5 mm or 3.6 mm, etc., but not limited to this.

[0031] Preferably, the distance between the first surface 112 a and the side wall 1012 is 0.2 mm to 0.8 mm, preferably 0.2 mm, 0.5 mm or 0.8 mm, but not limited thereto.

[0032] Preferably, the distance between the light guide plate 13 and the side wall 1012 is 0 mm to 1.7 mm, preferably 0.5 mm, 1.0 mm or 1.7 mm, etc. When the light guide plate 13 has not expanded, the distance between the light guide plate 13 and the side wall 1012 is 1.7 mm. When the light guide plate 13 expands to the maximum, the light guide plate 13 contacts the side wall 1012, but does not abut against the side wall 1012.

[0033] In another preferred embodiment, the narrow-frame vehicle-mounted backlight module also includes a buffer layer, which is fixedly connected to the side wall 1012. When the reflective film 12, the light guide plate 13 or the optical film 14 expands into the groove 101, the buffer layer can provide a buffering force therefor to prevent any of the reflective film 12, the light guide plate 13 or the optical film 14 from abutting against the side wall 1012, thereby causing a film arch phenomenon.

[0034] Preferably, the narrow-frame vehicle-mounted backlight module also includes a middle frame 18 and multiple dust-proof glue 16. The middle frame 18 is fixedly connected to the lower frame 11. The dust-proof glue is connected between the middle frame 18 and the lower frame 11 to isolate dust or foreign matter and prevent dust or foreign matter from entering the display area to affect the display effect of the backlight module.

[0035] Preferably, the narrow-frame vehicle-mounted backlight module further includes foam glue 17 , which is connected to one end of the middle frame 18 away from the lower frame 11 , and is used for buffering and fixing the display screen.

[0036] Preferably, the optical film 14 includes a diffusion film 141, a brightness enhancement film 142 and a brightness enhancement film 143, wherein the diffusion film 141 is arranged on the light guide plate 13, the brightness enhancement film 142 is arranged on the diffusion film 141, and the brightness enhancement film 143 is arranged on the brightness enhancement film 142. The diffusion film 141 is fixedly connected to the light guide plate 13 by double-sided adhesive tape, and the diffusion film 141, the brightness enhancement film 142 and the brightness enhancement film 143 can be fixedly connected by double-sided adhesive tape; or they can be positioned by means of a card block and a card slot, and then fixed by double-sided adhesive tape, so as to increase the firmness of the connection between the films.

[0037] The utility model also relates to a vehicle display device, including the above-mentioned vehicle backlight module with a narrow frame. The vehicle display device of the utility model is, for example, a high-end vehicle instrument, a vehicle central control display, a vehicle driving recorder, a vehicle DVD navigation, etc., but is not limited thereto.

[0038] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A vehicle-mounted backlight module with a narrow frame, characterized in that: The optical film (14) comprises a lower frame (11), a reflective film (12), a light guide plate (13) and an optical film (14); the lower frame (11) comprises a bottom plate (111) and a side frame (112); the side frame (112) is fixedly connected to the bottom plate (111) and forms a receiving cavity (102); the side frame (112) comprises a first surface (112a) and a second surface (112b) which are arranged opposite to each other; the first surface (112a) is arranged in the receiving cavity (102); The first surface (112a) is recessed in a direction close to the second surface (112b) to form a groove (101); the groove (101) is connected to the accommodating cavity (102); the reflective film (12), the light guide plate (13) and the optical film (14) are respectively arranged in the accommodating cavity (102); and the groove (101) can provide expansion space for the reflective film (12), the light guide plate (13) and the optical film (14).

2. The narrow-frame vehicle-mounted backlight module according to claim 1, characterized in that: The side frame (112) comprises a first side plate (1121), a second side plate (1122) which are arranged opposite to each other, and a third side plate (1123), and a fourth side plate (1124) which are arranged opposite to each other; the first side plate (1121) and the second side plate (1122) are fixedly connected to the third side plate (1123) and the fourth side plate (1124) respectively; and the groove (101) is provided on the second side plate (1122), the third side plate (1123) and the fourth side plate (1124).

3. The narrow-frame vehicle-mounted backlight module according to claim 2, characterized in that: The groove (101) comprises a top surface (1011) and a side wall (1012); the top surface (1011) is fixedly connected to the side wall (1012); the side wall (1012) is fixedly connected to the inner surface of the bottom plate (111); and the distance between the top surface (1011) and the inner surface is 3.0 mm to 3.6 mm.

4. The narrow-frame vehicle-mounted backlight module according to claim 3, characterized in that: The distance between the first surface (112a) and the side wall (1012) is 0.2 mm to 0.8 mm.

5. The narrow-frame vehicle-mounted backlight module according to claim 3, characterized in that: The distance between the light guide plate (13) and the side wall (1012) is 0 mm to 1.7 mm.

6. The narrow-frame vehicle-mounted backlight module according to claim 5, characterized in that: The narrow-frame vehicle-mounted backlight module further comprises a buffer layer, and the buffer layer is fixedly connected to the side wall (1012).

7. The narrow-frame vehicle-mounted backlight module according to claim 5 or 6, characterized in that: The narrow-frame vehicle-mounted backlight module further comprises a light bar (15), and the light bar (15) is fixedly connected to the first side plate (1121).

8. The narrow-frame vehicle-mounted backlight module according to claim 7, characterized in that: The narrow-frame vehicle-mounted backlight module further comprises a middle frame (18) and a plurality of dustproof adhesives (16); the middle frame (18) is fixedly connected to the lower frame (11); and the dustproof adhesives are connected between the middle frame (18) and the lower frame (11).

9. The narrow-frame vehicle-mounted backlight module according to claim 8, characterized in that: The narrow-frame vehicle-mounted backlight module further comprises foam glue (17), wherein the foam glue (17) is connected to an end of the middle frame (18) away from the lower frame (11), and the foam glue (17) is used for buffering and fixing the display screen.

10. A vehicle-mounted display device, characterized in that: A vehicle-mounted backlight module with a narrow frame comprising the narrow frame as claimed in any one of claims 1 to 9.

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