Thin vehicle-mounted backlight module and vehicle-mounted display device

Abstract

The utility model provides a thinned vehicle-mounted backlight module, which comprises a lower frame, a middle frame, a reflecting film, a light guide plate and an optical film, the reflecting film, the light guide plate and the optical film are fixedly connected in the lower frame in sequence, the lower frame comprises a bottom plate and a side frame, the side frame is fixedly connected with the bottom plate, and the middle frame is fixedly connected with the side frame. The side frame comprises an inner side face and an outer side face, the inner side face is sunken in the direction close to the outer side face to form a plurality of clamping grooves, the middle frame is provided with a plurality of clamping blocks, and the clamping blocks are matched with the clamping grooves to enable the middle frame to be connected with the lower frame. The thinned vehicle-mounted backlight module can meet the thinned requirement, and the quality and the strength of products are improved. The utility model further relates to a vehicle-mounted display device.

Description

TECHNICAL FIELD

[0001] The utility model relates to display screen technical field especially is related to a kind of thin type vehicle-mounted backlight module and vehicle-mounted display device. BACKGROUND

[0002] The thickness of the display screen for the current automobile is gradually designed thinner and thinner, and the thickness of the corresponding backlight module is also required to be thinned. Figures 1 to 3 As shown in the figure, the existing backlight module includes a lower iron frame 21 and a middle frame. The lower iron frame 21 includes a bottom plate 211 and a side frame 212 fixedly connected with the bottom plate 211. The side frame 212 is provided with a plurality of positioning holes 201, and the positioning holes 201 are arranged through the side frame 212. The middle frame is provided with a plurality of positioning blocks, and the positioning blocks are matched with the positioning holes 201 to realize the fixed connection of the middle frame and the lower iron frame 21. Then, the positioning holes 201 are covered by the adhesive tape pasted on the outside of the middle frame to avoid the phenomenon of light leakage. Since the positioning holes 201 are arranged through the side frame 212, the thickness L between the positioning holes 201 and the top surface 2121 of the side frame 212 is at least 1.5 mm to ensure the molding of the positioning holes 201 and the strength of the top surface 2121 of the side frame 212. Since the thickness L between the positioning holes 201 and the top surface 2121 of the side frame 212 is at least 1.5 mm, the overall thickness of the side frame 212 cannot meet the requirement of thinness. Otherwise, not only the phenomenon of deformation will occur, but also the quality problem will occur. SUMMARY

[0003] Therefore, the purpose of the utility model is to provide a thin type vehicle-mounted backlight module, which can solve the problems existing in the prior art, realize thinness, and improve the quality and strength of the product.

[0004] The utility model provides a thin type vehicle-mounted backlight module, which comprises a lower frame, a middle frame, a reflective film, a light guide plate and an optical film piece. The reflective film, the light guide plate and the optical film piece are fixedly connected in the lower frame in sequence. The lower frame comprises a bottom plate and a side frame. The side frame is fixedly connected to the bottom plate. The side frame comprises an inner side and an outer side. The inner side is recessed in the direction close to the outer side to form a plurality of clamping grooves. The middle frame is provided with a plurality of clamping blocks. The clamping blocks are matched with the clamping grooves to connect the middle frame and the lower frame.

[0005] In an embodiment, the groove comprises a top wall and a bottom wall. The top wall and the bottom wall are oppositely arranged. The bottom wall is arranged close to the bottom plate. The side frame further comprises a top surface and a bottom surface oppositely arranged. The bottom surface is fixedly connected to the bottom plate. The distance between the top wall and the top surface is 0.3 mm to 0.8 mm.

[0006] In an embodiment, the depth of the clamping groove is less than the distance between the inner surface and the outer surface.

[0007] In an embodiment, the clamping block comprises a first side edge, a second side edge and a third side edge, the second side edge is fixedly connected between the first side edge and the third side edge, and the first side edge and the third side edge are inclined and symmetrically arranged.

[0008] In an embodiment, the first side edge is arcuately connected with the second side edge, and the second side edge is arcuately connected with the third side edge.

[0009] In an embodiment, the clamping block further comprises oppositely arranged first and second surfaces, the second side edge is arranged between the first and second surfaces, the second surface is arranged close to the bottom plate, the second surface is fixedly connected with a sliding block, the side frame is provided with a sliding groove, the sliding groove is arranged on the inner surface and penetrates through the top surface and the top wall, when the middle frame and the lower frame are clamped, the sliding block slides in the sliding groove, and when the clamping of the middle frame and the lower frame is completed, the sliding block is located between the clamping block and the bottom wall.

[0010] In an embodiment, the side frame comprises oppositely arranged first and second side plates and oppositely arranged third and fourth side plates, the first and second side plates are fixedly connected between the third and fourth side plates respectively, and the second side plate, the third side plate and the fourth side plate are respectively provided with the clamping groove.

[0011] In an embodiment, the thin-type vehicle-mounted backlight module further comprises a light bar, and the light bar is fixedly connected to the inner wall of the first side plate.

[0012] In an embodiment, the optical film comprises a diffusion film, a lower light enhancement film, an upper light enhancement film and a brightness enhancement film, the diffusion film is fixedly connected to the light guide plate, the lower light enhancement film is fixedly connected to the diffusion film, the upper light enhancement film is fixedly connected to the lower light enhancement film, and the brightness enhancement film is fixedly connected to the upper light enhancement film.

[0013] The utility model also relates to a kind of vehicle-mounted display device, comprising the thin-type vehicle-mounted backlight module of above.

[0014] The lower frame of the thin-type vehicle-mounted backlight module is provided with a plurality of clamping grooves, the clamping grooves are formed by the inner side of the side frame being recessed towards the outer side of the side frame, and the clamping grooves do not penetrate the inner side and the outer side. This not only avoids the phenomenon of light leakage, but also the structure of the side frame where the clamping grooves are located has greater strength because it penetrates the side frame, so it will not break. On this basis, the height of the side frame can be reduced to achieve a thin backlight module and improve the quality of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0016] Figure 1 is a structural schematic diagram of a lower iron frame of the prior art.

[0017] Figure 2 is Figure 1 is an enlarged structural schematic diagram of the front of A in the figure.

[0018] Figure 3 is Figure 1 is an enlarged structural schematic diagram of the back of A in the figure.

[0019] Figure 4 is a structural schematic diagram of a lower frame of the present application.

[0020] Figure 5 is Figure 4 is an enlarged structural schematic diagram of the front of B in the figure.

[0021] Figure 6 is Figure 4 is an enlarged structural schematic diagram of the back of B in the figure.

[0022] Figure 7 is a split structural schematic diagram of a thin type vehicle-mounted backlight module of the present application.

[0023] Figure 8 is Figure 7 is an enlarged structural schematic diagram of C in the figure.

[0024] Explanation of the reference numerals: card slot - 101; top wall - 1011; bottom wall - 1012; lower frame - 11; bottom plate - 111; side frame - 112; first side plate - 112a; second side plate - 112b; third side plate - 112c; fourth side plate - 112d; inner surface - 1121; outer surface - 1122; top surface - 1123; middle frame - 12; clamping block - 121; first side edge - 1211; second side edge - 1212; third side edge - 1213; first surface - 1214; second surface - 1215; reflective film - 13; light guide plate - 14; optical film - 15; diffusion film - 151; lower light enhancement film - 152; upper light enhancement film - 153; brightness enhancement film - 154; light bar - 16; foam glue - 17; heat-conducting double-sided adhesive - 18.

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be described in detail hereinafter with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the description of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0027] In the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "install", "connect" and the like should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the present application when it is usually placed, which is only for the convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] The terms "first", "second", "third" and the like are only for distinguishing similar attributes of elements, and do not indicate or imply relative importance or a particular order.

[0030] The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to containing the listed elements, other elements not explicitly listed can also be contained.

[0031] As Figures 4 to 8As shown, the thin type vehicle-mounted backlight module comprises a lower frame 11, a middle frame 12, a reflective film 13, a light guide plate 14 and an optical film 15, the reflective film 13, the light guide plate 14 and the optical film 15 are sequentially fixedly connected in the lower frame 11, 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, the side frame 112 comprises an inner side and an outer side, the inner side is recessed to form a plurality of clamping grooves 101 in a direction close to the outer side, the middle frame 12 is provided with a plurality of clamping blocks 121, the clamping blocks 121 are matched with the clamping grooves 101 to connect the middle frame 12 and the lower frame 11. In the embodiment, the reflective film 13 is fixedly connected to the bottom plate 111, the light guide plate 14 is fixedly connected to the reflective film 13, and the optical film 15 is fixedly connected to the light guide plate 14. The fixed connection mode is, for example, double-sided adhesive fixed connection, limiting block and limiting groove matched fixed connection, or a combination of the two, etc. The side frame 112 comprises a first side plate 112a and a second side plate 112b which are oppositely arranged, and a third side plate 112c and a fourth side plate 112d which are oppositely arranged. The first side plate 112a and the second side plate 112b are fixedly connected between the third side plate 112c and the fourth side plate 112d, respectively. The second side plate 112b, the third side plate 112c and the fourth side plate 112d are respectively provided with clamping grooves 101. The depth of the clamping groove 101 is less than the distance between the inner surface 1121 and the outer surface 1122. The clamping groove 101 does not penetrate the inner side and the outer side, so there is no light leakage phenomenon. The structural strength of the side frame 112 at the position provided with the clamping groove 101 is large, so there is no fracture phenomenon. On this basis, the height of the side frame 112 can be reduced.

[0032] The lower frame 11 of the thin type vehicle-mounted backlight module is provided with a plurality of clamping grooves 101. The clamping grooves 101 are recessed from the inner side of the side frame 112 towards the outer side of the side frame 112. The clamping grooves 101 do not penetrate the inner side and the outer side. Not only can the light leakage phenomenon be avoided, but also the structural strength of the side frame 112 at the position provided with the clamping groove 101 is large, so there is no fracture phenomenon. On this basis, the height of the side frame 112 can be reduced to realize the thin type backlight module and improve the quality of the product.

[0033] As shown in the figure, Figure 5 The groove comprises a top wall 1011 and a bottom wall 1012. The top wall 1011 and the bottom wall 1012 are oppositely arranged. The bottom wall 1012 is arranged close to the bottom plate 111. The side frame 112 further comprises a top surface 1123 and a bottom surface which are oppositely arranged. The bottom surface is fixedly connected to the bottom plate 111. The distance between the top wall 1011 and the top surface 1123 is 0.3mm-0.8mm, so as to reduce the thickness of the side frame and achieve the effect of thin type. Preferably, the distance is 0.3mm, 0.45mm, 0.55mm, 0.65mm or 0.8mm, but it is not limited thereto.

[0034] As shown in the figure, Figure 8As shown, the clamping block 121 comprises a first side 1211, a second side 1212 and a third side 1213, the second side 1212 is fixedly connected between the first side 1211 and the third side 1213, and the first side 1211 and the third side 1213 are inclined and symmetrically arranged; the first side 1211 and the second side 1212 are arcuately connected, and the second side 1212 and the third side 1213 are arcuately connected, so as to avoid the phenomenon that iron filings or dusts are generated due to scratching the side frame 112 when the clamping block 121 is matched with the clamping groove 101, thereby causing pollution to the display area of the backlight module.

[0035] In the embodiment, the middle frame 12 and the lower frame 11 are connected by interference fit to make the clamping block 121 and the clamping groove 101 be connected by clamping, and the middle frame 12 and the lower frame 11 are pasted together by double-sided adhesive.

[0036] In another preferred embodiment, the clamping block 121 further comprises a first surface 1214 and a second surface 1215 arranged oppositely, the second side 1212 is arranged between the first surface 1214 and the second surface 1215, the second surface 1215 is arranged close to the bottom plate 111, and the second surface 1215 is fixedly connected with a sliding block, the side frame 112 is provided with a sliding groove, the sliding groove is arranged on the inner surface 1121 and penetrates through the top surface 1123 and the top wall 1011, when the middle frame 12 and the lower frame 11 are clamped, the sliding block slides in the sliding groove, which facilitates the clamping block 121 to slide into the clamping groove 101 and reduces the force of manual operation when the middle frame 12 and the lower frame 11 are clamped; when the middle frame 12 and the lower frame 11 are clamped, the sliding block is located between the clamping block 121 and the bottom wall 1012, the middle frame 12 and the lower frame 11 are connected by clamping through the clamping block 121 and the clamping groove 101, and the middle frame 12 and the lower frame 11 are pasted together by double-sided adhesive.

[0037] As shown in the drawings, Figure 7 As shown, the thin vehicle-mounted backlight module further comprises a lamp strip 16, and the lamp strip 16 is fixedly connected to the inner wall of the first side plate 112a. In the embodiment, the lamp strip 16 comprises a flexible circuit board and a plurality of LED lamps, the plurality of LED lamps are electrically connected to the flexible circuit board, each LED lamp is arranged along the length direction of the flexible circuit board, and the flexible circuit board is fixedly connected to the first side plate 112a by the heat-conducting double-sided adhesive 18.

[0038] Preferably, the optical film 15 comprises a diffusion film 151, a lower light-enhancing film 152, an upper light-enhancing film 153 and a brightness enhancement film 154, the diffusion film 151 is fixedly connected to the light guide plate 14, the lower light-enhancing film 152 is fixedly connected to the diffusion film 151, the upper light-enhancing film 153 is fixedly connected to the lower light-enhancing film 152, and the brightness enhancement film 154 is fixedly connected to the upper light-enhancing film 153. Among them, the diffusion film 151, the lower light-enhancing film 152, the upper light-enhancing film 153 and the brightness enhancement film 154 are fixedly connected to each other by double-sided adhesive.

[0039] Preferably, the thin back light module further comprises a foam tape 17, one side of the foam tape 17 is connected to the middle frame 12, and the foam tape 17 is used for buffering and fixing the display screen.

[0040] The present application also relates to a vehicle display device comprising the thin back light module.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A thin automotive backlight module, characterized in that, The device includes a lower frame (11), a middle frame (12), a reflective film (13), a light guide plate (14), and an optical film (15). The reflective film (13), the light guide plate (14), and the optical film (15) are sequentially fixedly connected to the lower frame (11). The lower frame (11) includes a base plate (111) and a side frame (112). The side frame (112) is fixedly connected to the base plate (111). The side frame (112) includes an inner side and an outer side. The inner side is recessed towards the outer side to form multiple slots (101). The middle frame (12) is provided with multiple locking blocks (121). The locking blocks (121) cooperate with the slots (101) to connect the middle frame (12) to the lower frame (11).

2. The thin automotive backlight module as described in claim 1, characterized in that, The groove includes a top wall (1011) and a bottom wall (1012), the top wall (1011) and the bottom wall (1012) are arranged opposite to each other, the bottom wall (1012) is arranged close to the base plate (111), the side frame (112) also includes a top surface (1123) and a bottom surface arranged opposite to each other, the bottom surface is fixedly connected to the base plate (111), and the distance between the top wall (1011) and the top surface (1123) is 0.3mm to 0.8mm.

3. The thin automotive backlight module as described in claim 2, characterized in that, The depth of the slot (101) is less than the distance between the inner surface (1121) and the outer surface (1122).

4. The thin automotive backlight module as described in claim 2, characterized in that, The card block (121) includes a first side (1211), a second side (1212) and a third side (1213). The second side (1212) is fixedly connected between the first side (1211) and the third side (1213). The first side (1211) and the third side (1213) are inclined and symmetrically arranged.

5. The thin automotive backlight module as described in claim 4, characterized in that, The first side (1211) and the second side (1212) are connected by an arc, and the second side (1212) and the third side (1213) are connected by an arc.

6. The thin automotive backlight module as described in claim 4, characterized in that, The locking block (121) further includes a first surface (1214) and a second surface (1215) disposed opposite to each other. The second side (1212) is disposed between the first surface (1214) and the second surface (1215). The second surface (1215) is disposed close to the bottom plate (111). A slider is fixedly connected to the second surface (1215). The side frame (112) is provided with a sliding groove. The sliding groove is disposed on the inner surface (1121) and passes through the top surface (1123) and the top wall (1011). When the middle frame (12) is engaged with the lower frame (11), the slider slides in the sliding groove. When the middle frame (12) and the lower frame (11) are engaged, the slider is located between the locking block (121) and the bottom wall (1012).

7. The thin automotive backlight module as described in claim 1, characterized in that, The side frame (112) includes a first side plate (112a), a second side plate (112b), and a third side plate (112c) and a fourth side plate (112d) arranged opposite to each other. The first side plate (112a) and the second side plate (112b) are respectively fixedly connected between the third side plate (112c) and the fourth side plate (112d). The second side plate (112b), the third side plate (112c), and the fourth side plate (112d) are respectively provided with the slot (101).

8. The thin automotive backlight module as described in claim 7, characterized in that, The thin-film vehicle backlight module also includes a light strip (16), which is fixedly connected to the inner wall of the first side panel (112a).

9. The thin automotive backlight module as described in any one of claims 1 to 8, characterized in that, The optical film (15) includes a diffusion film (151), a lower brightness enhancement film (152), an upper brightness enhancement film (153), and a brightness enhancement film (154). The diffusion film (151) is fixedly connected to the light guide plate (14), the lower brightness enhancement film (152) is fixedly connected to the diffusion film (151), the upper brightness enhancement film (153) is fixedly connected to the lower brightness enhancement film (152), and the brightness enhancement film (154) is fixedly connected to the upper brightness enhancement film (153).

10. A vehicle-mounted display device, characterized in that, Including the thin-film automotive backlight module as described in any one of claims 1 to 9.

Images