Vehicle-mounted backlight module and vehicle-mounted display device for preventing light guide plate positioning column from breaking

Abstract

The utility model provides a vehicle-mounted backlight module for preventing the breakage of the positioning column of the light guide plate, comprising a lower frame, a reflective film, a light guide plate, a flexible cover and an optical film, wherein the reflective film is arranged in the lower frame, the light guide plate is arranged on the reflective film, the light guide plate is fixedly connected with a positioning column, the bottom plate of the lower frame is provided with a positioning groove, the positioning column is arranged in the positioning groove, the flexible cover is arranged between the bottom plate and the positioning column, the flexible cover covers the positioning column, and the optical film is arranged on the light guide plate. The vehicle-mounted backlight module for preventing the breakage of the positioning column of the light guide plate of the utility model can avoid the breakage of the positioning column of the light guide plate and improve the quality of the vehicle-mounted backlight module. The utility model also 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 and a vehicle-mounted display device capable of preventing a light guide plate positioning column from breaking. Background Art

[0002] Intelligent society The application of display screens is becoming more and more extensive. With the application of electric vehicles and autonomous driving, the demand for vehicle-mounted electronic products, such as central control displays, instrument panels, rearview mirrors, armrest screens, etc., has also steadily increased. As a result, more backlight manufacturers from other fields (mobile phones, tablets, computers, TVs) have also joined the vehicle-mounted backlight industry, resulting in the entire vehicle-mounted backlight industry's requirements for abnormal noise of backlight modules and fracture of light guide plate columns to increase.

[0003] Since vehicle-mounted products have very high requirements for vibration, it is critical to prevent optical structural parts from breaking and making abnormal noises during vibration. The traditional light guide plate column is covered with a ring-shaped hollow structure of silicone and then assembled into the iron frame sink groove. This design has produced more and more hidden dangers in the actual assembly process. Since the light guide plate column is covered with a ring-shaped hollow structure of silicone, it will rub against the sink groove of the lower iron frame during the assembly process, causing the silicone to be squeezed, deformed and displaced, and cannot be effectively installed in the sink groove, causing the light guide column to jump out, and the light guide plate and the iron frame cannot be effectively fixed, which will cause abnormal noise and column breakage during the vibration of the light guide plate. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a vehicle-mounted backlight module that prevents the positioning columns of the light guide plate from breaking, which can solve the problems existing in the prior art, avoid the positioning columns of the light guide plate from breaking, and improve the quality of the vehicle-mounted backlight module.

[0005] The utility model provides a vehicle-mounted backlight module for preventing the breakage of a positioning column of a light guide plate, comprising a lower frame, a reflective film, a light guide plate, a flexible cover and an optical film, wherein the reflective film is arranged in the lower frame, the light guide plate is arranged on the reflective film, the light guide plate is fixedly connected with a positioning column, the bottom plate of the lower frame is provided with a positioning groove, the positioning column is arranged in the positioning groove, the flexible cover is arranged between the bottom plate and the positioning column, the flexible cover covers the positioning column, and the optical film is arranged on the light guide plate.

[0006] In one embodiment, the flexible cover includes a first flexible portion and a second flexible portion fixedly connected, a mounting groove is formed between the first flexible portion and the second flexible portion, the positioning column is arranged in the mounting groove, the first flexible portion is arranged circumferentially around the positioning column, and the second flexible portion is arranged to cover the first end surface of the positioning column.

[0007] In one embodiment, the second flexible portion is fixedly connected to the first end surface of the positioning post by means of an adhesive tape.

[0008] In one embodiment, at least two first limit blocks are provided at one end of the first flexible portion close to the second flexible portion, and the first limit blocks are spaced apart from each other. The positioning column is provided with a plurality of first limit grooves corresponding to the first limit blocks, and when the positioning column is assembled with the flexible cover, the first limit blocks are arranged in the first limit grooves.

[0009] In one embodiment, the first flexible portion includes a second end surface and an inner surface and an outer surface arranged oppositely, the second end surface is arranged at an end of the first flexible portion away from the second flexible portion, the second end surface is fixedly connected between the inner surface and the outer surface, and the second end surface is connected to the inner surface in an arc shape.

[0010] In one embodiment, at least two second limit blocks are provided at one end of the first flexible portion away from the second flexible portion, and the second limit blocks are spaced apart from each other. The positioning column is provided with a plurality of second limit grooves corresponding to the second limit blocks, and when the positioning column is assembled with the flexible cover, the second limit blocks are arranged in the second limit grooves.

[0011] In one embodiment, the depth of the mounting groove is 1.0 mm to 1.5 mm.

[0012] In one embodiment, the optical film comprises a diffusion film, a light enhancement film and a brightness enhancement film, the diffusion film is arranged on the light guide plate, the light enhancement film is arranged on the diffusion film, and the brightness enhancement film is arranged on the light enhancement film.

[0013] In one embodiment, the vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking further includes a light bar, and the light bar is fixedly connected to the side wall of the lower frame.

[0014] The utility model also relates to a vehicle-mounted display device, comprising the vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking.

[0015] The vehicle-mounted backlight module of the utility model sets the flexible cover between the bottom plate of the lower frame and the positioning column, and the flexible cover covers the positioning column. When the light guide plate is assembled, since the flexible cover covers the positioning column, the positioning column covered by the flexible cover will not be deformed during installation, thereby avoiding the vehicle-mounted backlight module from making abnormal noises or breaking the positioning column during vibration, thereby improving the quality of the vehicle-mounted backlight module. 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 schematic diagram of the disassembled structure of the lower frame and the light guide plate of the first embodiment of the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 It is a schematic diagram of the top view of the flexible cover of the first embodiment of the utility model;

[0020] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at the middle BB;

[0021] Figure 5 This is a schematic diagram of the disassembled structure of the vehicle-mounted backlight module of the first embodiment of the utility model;

[0022] Figure 6 It is a cross-sectional structural schematic diagram of another preferred embodiment of the utility model;

[0023] Description of the accompanying drawings: mounting groove -101; positioning groove -102; lower frame -11; bottom plate -111; reflective film -12; light guide plate -13; positioning column -131; first end surface -1311; optical film -14; diffusion film -141; brightness enhancement film -142; brightness enhancement film -143; flexible cover -15; first flexible part -151; second end surface -1511; inner surface -1512; outer surface -1513; second flexible part -152; tape -16; first limit block -171; light strip -18; foam glue -19.

[0024] 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

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] First embodiment

[0031] like Figures 1 to 5 As shown, the vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking comprises a lower frame 11, a reflective film 12, a light guide plate 13, a flexible cover 15 and an optical film 14, the reflective film 12 is arranged in the lower frame 11, the light guide plate 13 is arranged on the reflective film 12, the light guide plate 13 is fixedly connected with a positioning column 131, the bottom plate 111 of the lower frame 11 is provided with a positioning groove 102, the positioning column 131 is arranged in the positioning groove 102, the flexible cover 15 is arranged between the bottom plate 111 and the positioning column 131, the flexible cover 15 covers the positioning column 131, and the optical film 14 is arranged on the light guide plate 13. The flexible cover 15 is preferably made of rubber or silicone, but is not limited thereto.

[0032] The vehicle-mounted backlight module of the utility model sets the flexible cover 15 between the bottom plate 111 of the lower frame 11 and the positioning column 131, and the flexible cover 15 covers the positioning column 131. When the light guide plate 13 is assembled, since the flexible cover 15 covers the positioning column 131, the positioning column 131 covered by the flexible cover 15 will not be deformed during installation, thereby avoiding the vehicle-mounted backlight module from generating abnormal noise during vibration or the positioning column 131 from breaking, thereby improving the quality of the vehicle-mounted backlight module.

[0033] like Figure 3 and Figure 4 As shown, the flexible cover 15 includes a first flexible portion 151 and a second flexible portion 152 that are fixedly connected. A mounting groove 101 is formed between the first flexible portion 151 and the second flexible portion 152. The positioning column 131 is arranged in the mounting groove 101. The depth of the mounting groove 101 is 1.0 mm to 1.5 mm, preferably 1.0 mm, 1.28 mm or 1.5 mm, etc. The first flexible portion 151 is circumferentially arranged around the positioning column 131, that is, the first flexible portion 151 is an annular hollow structure or a rectangular middle frame structure, and the second flexible portion 152 is arranged to cover the first end face 1311 of the positioning column 131. The second flexible portion 152 and the first end face 1311 of the positioning column 131 are fixedly connected by a tape 16. The tape 16 is preferably a double-sided tape, so that the second flexible portion 152 is fixed to the first end face 1311 of the positioning column 131, ensuring that the positioning column 131 can be effectively installed in the positioning groove 102. The thickness of the first flexible portion 151 is 0.5 mm to 0.7 mm, preferably 0.5 mm, 0.6 mm or 0.7 mm, and the thickness of the second flexible portion 152 is 0.2 mm to 0.4 mm, preferably 0.2 mm, 0.3 mm or 0.4 mm.

[0034] In another preferred embodiment, Figure 6 As shown, at least two first limit blocks 171 are provided at one end of the first flexible portion 151 close to the second flexible portion 152, and the first limit blocks 171 are arranged at intervals. The positioning column 131 is provided with a plurality of first limit grooves corresponding to the first limit blocks 171. When the positioning column 131 is assembled with the flexible cover 15, the first limit block 171 is arranged in the first limit groove. The first limit block 171 can limit the positioning column 131 to prevent the positioning column 131 from falling off from the installation groove 101 when the tape 16 fails, so that the silicone sleeve can play a buffering role during the vibration of the vehicle-mounted backlight module, thereby preventing the positioning column 131 of the light guide plate 13 from colliding with the lower frame 11 and causing the positioning column 131 to break.

[0035] like Figure 3 and Figure 4 As shown, the first flexible portion 151 includes a second end face 1511 and an inner surface 1512 and an outer surface 1513 that are relatively arranged. The second end face 1511 is arranged at an end of the first flexible portion 151 away from the second flexible portion 152. The second end face 1511 is fixedly connected between the inner surface 1512 and the outer surface 1513. The second end face 1511 and the inner surface 1512 are connected in an arc shape, which facilitates the assembly of the flexible cover 15 and the positioning column 131 and reduces the friction force of the flexible cover 15 on the positioning column 131.

[0036] like Figure 5As shown, the optical film 14 includes a diffusion film 141, a brightness enhancement film 142 and a brightness enhancement film 143. 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 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.

[0037] Preferably, the vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking further includes a light bar 18, which is fixedly connected to the side wall of the lower frame 11. In this embodiment, the light bar 18 includes a flexible circuit board and a plurality of LED lights, which are electrically connected to the flexible circuit board, and each LED light is arranged along the length direction of the flexible circuit board, and the flexible circuit board is fixedly connected to the inner wall of the lower frame 11 by a heat-conductive double-sided adhesive.

[0038] Preferably, the vehicle-mounted backlight module for preventing the light guide plate 13 from shifting further includes foam glue 19 , which is disposed on the side wall of the lower frame 11 , and is used for buffering and fixing the display screen.

[0039] Second embodiment

[0040] The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking of the present invention is substantially the same in structure as the vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking of the first embodiment, except that the structure of the flexible cover 15 is different.

[0041] Specifically, at least two second limit blocks are provided at one end of the first flexible portion 151 away from the second flexible portion 152, and the second limit blocks are arranged at intervals. The positioning column 131 is provided with a plurality of second limit grooves corresponding to the second limit blocks. When the positioning column 131 is assembled with the flexible cover 15, the second limit block is arranged in the second limit groove. The second limit block can limit the positioning column 131 to prevent the positioning column 131 from falling off from the installation groove 101 when the tape 16 fails, so that the silicone sleeve can play a buffering role during the vibration of the vehicle-mounted backlight module, and prevent the positioning column 131 of the light guide plate 13 from colliding with the lower frame 11 and causing the positioning column 131 to break. Among them, the number of the second limit blocks is preferably 2, 3 or 4, etc., but is not limited thereto.

[0042] The utility model also relates to a vehicle-mounted display device, including the vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking. The vehicle-mounted display device of the utility model is, for example, a high-end vehicle-mounted instrument, a vehicle-mounted central control display, a vehicle-mounted driving recorder, a vehicle-mounted DVD navigation, a vehicle-mounted integrated display screen for the driving console, or a vehicle-mounted streaming media rearview mirror, but is not limited thereto.

[0043] 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 for preventing the light guide plate positioning column from breaking, characterized in that: The invention comprises a lower frame (11), a reflective film (12), a light guide plate (13), a flexible cover (15) and an optical film (14); the reflective film (12) is arranged in the lower frame (11); the light guide plate (13) is arranged on the reflective film (12); the light guide plate (13) is fixedly connected with a positioning column (131); a bottom plate (111) of the lower frame (11) is provided with a positioning groove (102); the positioning column (131) is arranged in the positioning groove (102); the flexible cover (15) is arranged between the bottom plate (111) and the positioning column (131); the flexible cover (15) covers the positioning column (131); and the optical film (14) is arranged on the light guide plate (13).

2. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 1, characterized in that: The flexible cover (15) comprises a first flexible portion (151) and a second flexible portion (152) which are fixedly connected, a mounting groove (101) is formed between the first flexible portion (151) and the second flexible portion (152), the positioning column (131) is arranged in the mounting groove (101), the first flexible portion (151) is circumferentially arranged around the positioning column (131), and the second flexible portion (152) is arranged to cover a first end surface (1311) of the positioning column (131).

3. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 2, characterized in that: The second flexible portion (152) is fixedly connected to the first end surface (1311) of the positioning column (131) via an adhesive tape (16).

4. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 2, characterized in that: At least two first limit blocks (171) are provided at one end of the first flexible portion (151) close to the second flexible portion (152), and the first limit blocks (171) are arranged at intervals. The positioning column (131) is provided with a plurality of first limit grooves corresponding to the first limit blocks (171). When the positioning column (131) is assembled with the flexible cover (15), the first limit blocks (171) are arranged in the first limit grooves.

5. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 3 or 4, characterized in that: The first flexible portion (151) comprises a second end surface (1511) and an inner surface (1512) and an outer surface (1513) arranged opposite to each other, wherein the second end surface (1511) is arranged at an end of the first flexible portion (151) away from the second flexible portion (152), the second end surface (1511) is fixedly connected between the inner surface (1512) and the outer surface (1513), and the second end surface (1511) and the inner surface (1512) are connected in an arc shape.

6. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 5, characterized in that: At least two second limit blocks are provided at one end of the first flexible portion (151) away from the second flexible portion (152), and the second limit blocks are arranged at intervals. The positioning column (131) is provided with a plurality of second limit grooves corresponding to the second limit blocks. When the positioning column (131) is assembled with the flexible cover (15), the second limit blocks are arranged in the second limit grooves.

7. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 5, characterized in that: The depth of the installation groove (101) is 1.0 mm to 1.5 mm.

8. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 5, characterized in that: The optical film (14) comprises a diffusion film (141), a brightness enhancement film (142) and a brightness enhancement film (143); 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).

9. The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as claimed in claim 8, characterized in that: The vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking also includes a light bar (18), and the light bar (18) is fixedly connected to the side wall of the lower frame (11).

10. A vehicle-mounted display device, characterized in that: A vehicle-mounted backlight module for preventing the light guide plate positioning column from breaking as described in any one of claims 1 to 9.

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