CN218037621U

CN218037621U - Vehicle-mounted backlight module for preventing diaphragm from loosening and vehicle-mounted display device

Info

Publication number: CN218037621U
Application number: CN202222715292.XU
Authority: CN
Inventors: 赖小波; 曹俊威; 刘子平; 冯超
Original assignee: Shenzhen Hadbest Electronics Co ltd
Current assignee: Shenzhen Hadbest Electronics Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2022-12-13
Anticipated expiration: 2032-10-11

Abstract

The utility model provides a prevent not hard up on-vehicle backlight unit of diaphragm, including lower frame, reflectance coating, light guide plate and optics diaphragm, the reflectance coating sets up in the lower frame, and the light guide plate sets up on the reflectance coating, and the play plain noodles of light guide plate is fixed with first locating post, and the reference column is located the income light side of light guide plate, and the optics diaphragm is equipped with first locating post complex locating hole, and the locating hole runs through the setting of optics diaphragm, and first locating post setting is in the locating hole. The utility model discloses a backlight unit can avoid the aversion of optics diaphragm to lead to showing unusual problem. The utility model discloses still relate to an on-vehicle display device.

Description

Vehicle-mounted backlight module for preventing diaphragm from loosening and vehicle-mounted display device

Technical Field

The utility model relates to a display screen technical field especially relates to a prevent not hard up on-vehicle backlight unit of diaphragm and on-vehicle display device.

Background

Fig. 1 is a schematic view of a local splitting structure of a conventional backlight module, as shown in fig. 1, the backlight module includes a lower iron frame, a light guide plate 21 and an optical film 22, the light guide plate 21 is disposed in the lower iron frame, a light-emitting surface of the light guide plate 21 is provided with a positioning column 211, the optical film 22 is provided with a U-shaped groove 201 matched with the positioning column 211, the positioning column 211 is disposed in the U-shaped groove 201, the light guide plate 21 and the optical film 22 are fixed by a double-sided adhesive, so that the optical film 22 and the light guide plate 21 are fixed, but when the backlight module performs a vibration test with temperature, the double-sided adhesive may have a viscosity drop and fail due to high temperature, so as to cause a loose phenomenon between the optical film 22 and the light guide plate 21, the U-shaped groove 201 of the optical film 22 has a large displacement space in an X direction, and when the double-sided adhesive is implemented, the optical film 22 has a large displacement in the X direction, thereby causing an abnormal phenomenon of liquid crystal glass display.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a prevent that diaphragm is not hard up on-vehicle backlight unit, this backlight unit can solve the problem that exists among the prior art, avoids the aversion of optics diaphragm to lead to showing unusual problem.

The utility model provides a prevent not hard up on-vehicle backlight unit of diaphragm, including lower frame, reflectance coating, light guide plate and optics diaphragm, the reflectance coating sets up in the lower frame, and the light guide plate sets up on the reflectance coating, and the play plain noodles of light guide plate is fixed with first locating post, and the reference column is located the income light side of light guide plate, and the optics diaphragm is equipped with first locating post complex locating hole, and the locating hole runs through the setting of optics diaphragm, and first locating post setting is in the locating hole.

In an embodiment, the light guide plate includes a first side, a second side and a third side, the first side, the second side and the third side are opposite to each other, the third side is disposed on the light incident side, the first side and the second side are respectively and fixedly connected to two ends of the third side, and the first positioning column is disposed on one side of the third side close to the first side.

In one embodiment, the first positioning column comprises a limiting part and a supporting part, a limiting table is formed between the limiting part and the supporting part, and the upper surface of the optical membrane is in contact with or arranged opposite to the limiting table.

In one embodiment, the outer diameter of the limiting part is larger than that of the supporting part.

In an embodiment, the vehicle-mounted backlight module for preventing the diaphragm from loosening further includes a second positioning column, the second positioning column is disposed on one side of the third side close to the second side, the optical diaphragm is provided with a first positioning groove matched with the second positioning column, and the second positioning column is disposed in the first positioning groove.

In an embodiment, the third side edge is provided with an avoiding groove, and the avoiding groove is arranged between the first positioning column and the second positioning column.

In an embodiment, the vehicle-mounted backlight module for preventing the diaphragm from loosening further comprises a light bar, the light bar is fixedly connected to the inner wall of the lower frame, and the light bar is arranged in the avoiding groove.

In an embodiment, the lower frame includes a bottom plate and a side frame, the side frame is fixedly connected to the bottom plate, the bottom plate is provided with a second positioning groove, one side of the light guide plate away from the optical film is provided with a third positioning column, and the third positioning column is disposed in the second positioning groove.

In one embodiment, the optical film comprises a diffusion film, a lower brightness enhancement film and an upper brightness enhancement film, the diffusion film is arranged on the light guide plate, the lower brightness enhancement film is arranged on the diffusion film, the upper brightness enhancement film is arranged on the lower brightness enhancement film, and the diffusion film, the lower brightness enhancement film and the upper brightness enhancement film are respectively provided with a positioning hole.

The utility model discloses still relate to an on-vehicle display device, including foretell the not hard up on-vehicle backlight unit of diaphragm that prevents.

The utility model discloses a vehicle-mounted backlight module is at optics diaphragm setting in first locating column complex locating hole, sets up first locating column in the locating hole, and the locating hole is the annular hole, and when first locating column set up in the locating hole, the locating hole can restrict the displacement of locating column in X direction and Y direction, avoids the optics diaphragm to appear great aversion in the vibration test of taking the temperature; after backlight unit assembly is on-vehicle display device, use under the environment of high temperature and vibration and can avoid the display screen to show unusual phenomenon.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of a partially disassembled structure of a conventional backlight module.

Fig. 2 is a schematic view of a partially disassembled structure of the vehicular backlight module according to the first embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a structure at a in fig. 2.

Fig. 4 is an enlarged schematic view of B in fig. 2.

Fig. 5 is a schematic view of a split structure of the vehicle-mounted backlight module according to the first embodiment of the present invention.

Fig. 6 is a schematic side view of a light guide plate according to a second embodiment of the present invention.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. All other embodiments obtained by a person skilled in the art without any inventive work based on the description of the present invention belong to the protection scope of the present invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", and the like refer to orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally used to place the products of the present invention, and are used for convenience of description and simplicity of illustration, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the invention.

The terms "first," "second," "third," and the like are used solely to distinguish between similar elements and not to indicate or imply relative importance or a particular order.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

First embodiment

As shown in fig. 2 to 4, the on-vehicle backlight module for preventing the film loosening includes a lower frame 11, a reflective film 12, a light guide plate 13 and an optical film 14, wherein the reflective film 12 is disposed in the lower frame 11, the light guide plate 13 is disposed on the reflective film 12, a first positioning post 131 is fixed on a light-emitting surface 13a of the light guide plate 13, the positioning post is disposed on a light-entering side of the light guide plate 13, the optical film 14 is provided with a positioning hole 101 matched with the first positioning post 131, the positioning hole 101 is disposed through the optical film 14, and the first positioning post 131 is disposed in the positioning hole 101.

The utility model discloses a vehicle-mounted backlight module sets up in first locating column 131 complex locating hole 101 at optics diaphragm 14, sets up first locating column 131 in locating hole 101, and locating hole 101 is the annular hole, and when first locating column 131 set up in locating hole 101, locating hole 101 can restrict the displacement of reference column in X direction and Y direction, avoids optics diaphragm 14 to appear great aversion in the vibration test of taking the temperature; after the backlight module is assembled into the vehicle-mounted display device, the phenomenon that the display screen is abnormal in display can be avoided when the backlight module is used in a high-temperature and vibrating environment.

As shown in fig. 2, the optical film 14 includes a diffusion film 141, a lower brightness enhancement film 142, and an upper brightness enhancement film 143, the diffusion film 141 is disposed on the light guide plate 13, the lower brightness enhancement film 142 is disposed on the diffusion film 141, the upper brightness enhancement film 143 is disposed on the lower brightness enhancement film 142, and the diffusion film 141, the lower brightness enhancement film 142, and the upper brightness enhancement film 143 are respectively provided with positioning holes 101. In this embodiment, the diffusion film 141, the lower brightness enhancement film 142, and the upper brightness enhancement film 143 are also fixed by a double-sided tape.

Further, the light guide plate 13 includes a first side edge 135, a second side edge 136 and a third side edge 137 which are oppositely disposed, the third side edge 137 is disposed on the light incident side, the first side edge 135 and the second side edge 136 are respectively and fixedly connected to two ends of the third side edge 137, and the first positioning column 131 is disposed on one side of the third side edge 137 close to the first side edge 135. In this embodiment, the second side 136 is provided with a clamping plate 138, the clamping plate 138 is fixedly connected to the second side 136, the clamping plate 138 is an arc-shaped plate, the lower frame 11 is provided with a clamping groove matched with the clamping plate 138, and the clamping plate 138 is disposed in the clamping groove.

As shown in fig. 2 and fig. 4, the vehicle-mounted backlight module for preventing the film from loosening further includes a second positioning pillar 132, the second positioning pillar 132 is disposed on a side of the third side edge 137 close to the second side edge 136, the optical film 14 is provided with a first positioning groove 102 engaged with the second positioning pillar 132, the first positioning groove 102 is formed by the second side edge 136 being recessed toward the first side edge 135, the second positioning pillar 132 is disposed in the first positioning groove 102, and the first positioning groove 102 is beneficial for the optical film 14 to extend along the long axis direction of the light guide plate 13 under the condition of high temperature, so as to prevent the optical film 14 from having an arch film phenomenon.

As shown in fig. 5, the vehicle-mounted backlight module for preventing the diaphragm from loosening further includes a light bar 16, the light bar 16 is fixedly connected to the inner wall of the lower frame 11, the third side edge 137 is provided with an avoiding groove 103, the avoiding groove 103 is arranged between the first positioning column 131 and the second positioning column 132, and the light bar 16 is arranged in the avoiding groove 103.

Further, the lower frame 11 includes a bottom plate and a side frame, the side frame is fixedly connected to the bottom plate, the bottom plate is provided with a second positioning groove, one side of the light guide plate 13, which is away from the optical film 14, is provided with a third positioning column 133, the third positioning column 133 is disposed in the second positioning groove, and the third positioning column 133 can fix the relative position of the light guide plate 13 and the bottom plate, so as to avoid the light guide plate 13 from loosening.

Further, prevent that the not hard up on-vehicle backlight unit of diaphragm still includes reflectance coating 12, reflectance coating 12 passes through double faced adhesive tape fixed connection in the bottom plate, and light guide plate 13 fixed connection is on reflectance coating 12.

Further, prevent that on-vehicle backlight unit of diaphragm not hard up still includes center 15, is equipped with the mounting groove on center 15, is equipped with the installation piece on the side frame, through mounting groove and installation piece fixed connection between center 15 and the side frame.

Further, prevent that flexible on-vehicle backlight unit of diaphragm still includes lamp strip 16, and lamp strip 16 passes through the heat conduction double faced adhesive tape to be fixed on the side frame, and lamp strip 16 sets up with light guide plate 13's income light side is relative, and the heat conduction double faced adhesive tape is used for dispelling the heat for lamp strip 16.

Further, prevent that on-vehicle backlight unit that the diaphragm is not hard up still includes the bubble celloidin, and bubble celloidin fixed connection is on center 15, and the bubble celloidin is used for buffering fixed display screen.

Second embodiment

The utility model discloses a prevent that flexible on-vehicle backlight unit of diaphragm and the on-vehicle backlight unit that prevents of first embodiment from flexible are structurally roughly the same, and the difference lies in the structure difference of first reference column 131.

As shown in fig. 6, the first positioning column 131 includes a stopper 1311 and a support 1312, a stopper 1313 is formed between the stopper 1311 and the support 1312, the upper surface of the optical film 14 is in contact with or opposite to the stopper 1313, and the upper surface of the upper brightness enhancement film 143 is in contact with or opposite to the stopper 1313. The outer diameter of the position-limiting portion 1311 is larger than the outer diameter of the supporting portion 1312, and after the first positioning column 131 penetrates through the positioning hole 101, the positioning hole 101 of the optical film 14 is clamped on the position-limiting table 1313, so that abnormal noise caused by up-and-down movement of the optical film 14 is avoided.

The utility model discloses still relate to an on-vehicle display device, including foretell on-vehicle backlight unit that prevents that the diaphragm is not hard up. In the present embodiment, the on-board display device is, for example, a meter display screen, a head-up display screen, a center control display screen, a rear seat entertainment display screen, or the like, but not limited thereto.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a prevent on-vehicle backlight unit that diaphragm is not hard up, its characterized in that, includes lower frame (11), reflectance coating (12), light guide plate (13) and optics diaphragm (14), reflectance coating (12) set up in lower frame (11), light guide plate (13) set up on reflectance coating (12), light-emitting surface (13 a) of light guide plate (13) are fixed with first locating column (131), the reference column is located the income light side of light guide plate (13), optics diaphragm (14) be equipped with first locating column (131) complex locating hole (101), locating hole (101) run through optics diaphragm (14) set up, first locating column (131) set up in locating hole (101).

2. The on-vehicle backlight module for preventing the diaphragm from loosening as claimed in claim 1, wherein the light guide plate (13) includes a first side (135), a second side (136) and a third side (137) disposed opposite to each other, the third side (137) is disposed at the light incident side, the first side (135) and the second side (136) are respectively and fixedly connected to two end portions of the third side (137), and the first positioning pillar (131) is disposed at a side of the third side (137) close to the first side (135).

3. The on-vehicle backlight module for preventing the membrane from loosening as claimed in claim 2, wherein the first positioning column (131) comprises a limiting portion (1311) and a supporting portion (1312), a limiting platform (1313) is formed between the limiting portion (1311) and the supporting portion (1312), and the upper surface of the optical membrane (14) is in contact with or opposite to the limiting platform (1313).

4. The on-vehicle backlight module for preventing the diaphragm from loosening as claimed in claim 3, wherein the outer diameter of the limiting portion (1311) is larger than the outer diameter of the supporting portion (1312).

5. The on-vehicle backlight module for preventing the diaphragm from loosening according to claim 2, wherein the on-vehicle backlight module for preventing the diaphragm from loosening further includes a second positioning pillar (132), the second positioning pillar (132) is disposed on a side of the third side edge (137) close to the second side edge (136), the optical diaphragm (14) is provided with a first positioning groove (102) engaged with the second positioning pillar (132), and the second positioning pillar (132) is disposed in the first positioning groove (102).

6. The vehicular backlight module for preventing the diaphragm from loosening as claimed in claim 5, wherein the third side (137) is provided with an avoiding groove (103), and the avoiding groove (103) is disposed between the first positioning column (131) and the second positioning column (132).

7. The vehicle-mounted backlight module for preventing the diaphragm from loosening as claimed in claim 6, further comprising a light bar (16), wherein the light bar (16) is fixedly connected to an inner wall of the lower frame (11), and the light bar (16) is disposed in the avoiding groove (103).

8. The vehicular backlight module for preventing the film loosening as claimed in claim 1, wherein the lower frame (11) comprises a bottom plate and a side frame, the side frame is fixedly connected to the bottom plate, the bottom plate is provided with a second positioning groove, a side of the light guide plate (13) away from the optical film (14) is provided with a third positioning column (133), and the third positioning column (133) is disposed in the second positioning groove.

9. The vehicle-mounted backlight module for preventing the film from loosening as claimed in claim 1, wherein the optical film (14) comprises a diffusion film (141), a lower light enhancement film (142) and an upper light enhancement film (143), the diffusion film (141) is disposed on the light guide plate (13), the lower light enhancement film (142) is disposed on the diffusion film (141), the upper light enhancement film (143) is disposed on the lower light enhancement film (142), and the diffusion film (141), the lower light enhancement film (142) and the upper light enhancement film (143) are respectively provided with a positioning hole (101).

10. An on-vehicle display device, comprising the on-vehicle backlight module for preventing the membrane from loosening of any claim 1 to 9.