CN218068344U

CN218068344U - Vehicle-mounted backlight module for preventing light guide plate from swinging and vehicle-mounted display device

Info

Publication number: CN218068344U
Application number: CN202222715204.6U
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: 2022-10-10
Filing date: 2022-10-10
Publication date: 2022-12-16
Anticipated expiration: 2032-10-10

Abstract

The utility model provides a prevent on-vehicle backlight unit of light guide plate wobbling, including lower frame, light guide plate and lamp strip, lamp strip fixed connection is in the inner wall of lower frame, the lower frame include the bottom plate and with bottom plate fixed connection's side frame, the side frame is equipped with at least one first locating groove, the light guide plate be equipped with first locating groove complex locating piece, the locating piece setting is at first locating groove. The utility model discloses an on-vehicle backlight unit can avoid the light guide plate to lead to the phenomenon that the light guide plate is beated because of the vibration. The utility model discloses still relate to an on-vehicle display device.

Description

Vehicle-mounted backlight module capable of preventing light guide plate from swinging and vehicle-mounted display device

Technical Field

The utility model relates to a display screen technical field especially relates to a prevent on-vehicle backlight unit and on-vehicle display device of light guide plate wobbling.

Background

Current backlight unit includes chase down, reflectance coating and light guide plate, the reflectance coating passes through the double faced adhesive tape to be fixed under in the chase, the light guide plate passes through the double faced adhesive tape to be fixed on the reflectance coating, when backlight unit is in under the vibration environment, the double faced adhesive tape became invalid easily and drops among the vibration process, lead to the light guide plate to beat from top to bottom in backlight unit's inside, after backlight unit installation display screen, the light guide plate beat from top to bottom can lead to setting up the optics diaphragm friction FOG liquid crystal glazing on the light guide plate, thereby arouse FOG liquid crystal glazing and show unusual phenomenon.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a prevent wobbling on-vehicle backlight unit of light guide plate, this backlight unit can solve the problem that exists among the prior art, avoids the light guide plate to lead to the phenomenon that the light guide plate is beated because of the vibration.

The utility model provides a prevent on-vehicle backlight unit of light guide plate wobbling, including lower frame, light guide plate and lamp strip, lamp strip fixed connection is in the inner wall of lower frame, the lower frame include the bottom plate and with bottom plate fixed connection's side frame, the side frame is equipped with at least one first locating groove, the light guide plate be equipped with first locating groove complex locating piece, the locating piece setting is at first locating groove.

In one embodiment, the side frame includes a first side plate, a second side plate, a third side plate and a fourth side plate, the first side plate and the second side plate are disposed opposite to each other, the third side plate and the fourth side plate are disposed opposite to each other, the first side plate and the second side plate are respectively and fixedly connected to the third side plate and the fourth side plate, the light bar is fixedly connected to the first side plate, and the first positioning slot is disposed in the second side plate; or the first positioning groove is arranged on the third side plate; or the first positioning groove is arranged on the fourth side plate.

In an embodiment, the light guide plate includes a side surface, a first surface and a second surface that are oppositely disposed, the side surface is fixedly connected between the first surface and the second surface, the first surface is disposed near the bottom plate, and the positioning block is fixedly connected to the side surface.

In an embodiment, the positioning block includes a first side and a second side opposite to each other, and a third side and a fourth side opposite to each other, the first side and the second side are fixedly connected to the third side and the fourth side, respectively, the first side is fixedly connected to the side surface, and the length of the first side is greater than the length of the second side.

In one embodiment, the second side edge is connected with the third side edge in an arc shape, and the second side edge is connected with the fourth side edge in an arc shape.

In one embodiment, the third side is connected with the side in an arc shape, and the fourth side is connected with the side in an arc shape.

In an embodiment, the positioning block includes a first side and a second side that are oppositely disposed, the first side is fixedly connected to the side surface, and two ends of the second side are respectively arc-connected to the side surface.

In an embodiment, the vehicle-mounted backlight module for preventing the light guide plate from swinging further comprises a reflective film and an adhesive tape, the reflective film is arranged on the bottom plate, the adhesive tape is fixedly connected between the reflective film and the light guide plate, and the adhesive tape is located on one side of the light guide plate close to the positioning block.

In an embodiment, the vehicle-mounted backlight module for preventing the light guide plate from swinging further comprises an optical diaphragm, the optical diaphragm is arranged on the light guide plate and provided with a second positioning groove, one side, close to the light bar, of the light guide plate is provided with a positioning column matched with the second positioning groove, and the positioning column is arranged in the second positioning groove.

The utility model discloses still relate to an on-vehicle display device, including foretell on-vehicle backlight unit who prevents light guide plate wobbling.

The utility model discloses a backlight unit sets up the locating piece at the light guide plate, sets up first constant head tank at the side frame, inserts the locating piece in the constant head tank, can fix the light guide plate, avoids the light guide plate to beat from top to bottom, behind backlight unit installation display screen, can avoid the demonstration of display screen unusual, improves the quality of product, improves customer's use and experiences.

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 view of a partially disassembled structure of a backlight module according to a first embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic diagram of a partially enlarged structure of a light guide plate according to a first embodiment of the present invention.

Fig. 4 is a schematic view of a split structure of a backlight module according to a first embodiment of the present invention.

Fig. 5 is a partially enlarged schematic structural 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 an orientation or positional relationship based on that shown in the drawings, or that is conventionally placed during use of the invention, for convenience of description and simplicity of illustration, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not 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. 1, 2 and 3, the vehicle-mounted backlight module for preventing the light guide plate from swinging includes a lower frame 11, a light guide plate 12 and a light bar 13, the light bar 13 is fixedly connected to the inner wall of the lower frame 11, the lower frame 11 includes a bottom plate 111 and a side frame 112 fixedly connected to the bottom plate 111, the side frame 112 is provided with at least one first positioning groove 101, the light guide plate 12 is provided with a positioning block 121 matched with the first positioning groove 101, the positioning block 121 and the light guide plate 12 are of an integral structure, and the positioning block 121 is disposed in the first positioning groove 101. In this embodiment, the lower frame 11 is a die-cast component, the side frame 112 and the bottom plate 111 are of an integral structure, the number of the first positioning grooves 101 is, for example, two or three, when the number of the first positioning grooves 101 is two, the two first positioning grooves 101 are arranged at intervals, the number of the positioning blocks 121 matches with the number and shape of the first positioning grooves 101, and the light guide plate 12 and the side frame 112 are matched to increase the stability of the light guide plate 12, thereby preventing the light guide plate 12 from loosening and jumping.

The utility model discloses a backlight unit sets up locating piece 121 at light guide plate 12, sets up first constant head tank 101 at side frame 112, inserts the constant head tank with locating piece 121 in, can fix light guide plate 12, avoids light guide plate 12 to beat from top to bottom, behind backlight unit installation display screen, can avoid the demonstration of display screen unusual, improves the quality of product, improves customer's use and experiences.

Further, the side frame 112 includes a first side plate 1121, a second side plate 1122, a third side plate 1123, and a fourth side plate 1124, the first side plate 1121 and the second side plate 1122 are disposed opposite to each other, the third side plate 1123 and the fourth side plate 1124 are disposed opposite to each other, the first side plate 1121 and the second side plate 1122 are respectively and fixedly connected to the third side plate 1123 and the fourth side plate 1124, the light bar 13 is fixedly connected to the first side plate 1121 through a heat conductive double-sided adhesive tape, the first positioning slot 101 is disposed on the second side plate 1122, the positioning block 121 is disposed on one side of the light guide plate 12 close to the second side plate 1122, the positioning block 121 is inserted into the first positioning slot 101, so that the light guide plate 12 can be fixed, and the second side plate 1122 is a long-axis edge of the lower frame 11.

In another preferred embodiment, the first positioning groove 101 is formed on a third side plate 1123, and the third side plate 1123 is a short side of the lower frame 11.

In another preferred embodiment, the first positioning groove 101 is disposed on the fourth side plate 1124.

Further, the light guide plate 12 includes a side surface 12a, a first surface and a second surface 12b disposed opposite to each other, the side surface 12a is fixedly connected between the first surface and the second surface 12b, the first surface is disposed near the bottom plate 111, and the positioning block 121 is fixedly connected to the side surface 12a.

Further, the positioning block 121 includes a first side (not shown), a second side 1211, a third side 1212 and a fourth side 1213, wherein the first side 1211 and the fourth side 1213 are disposed opposite to each other, the first side and the second side 1211 are respectively and fixedly connected to the third side 1212 and the fourth side 1213, the first side is fixedly connected to the side 12a, and the length of the first side is greater than the length of the second side 1211, so that the positioning block 121 can be conveniently inserted into the positioning slot.

Further, the second side 1211 is connected to the third side 1212 in an arc shape, and the second side 1211 is connected to the fourth side 1213 in an arc shape, so as to prevent the light guide plate 12 from being damaged by the lower bezel when the positioning block 121 is inserted into the positioning slot.

Further, the third side 1212 is connected to the side surface 12a in an arc shape, the fourth side 1213 is connected to the side surface 12a in an arc shape, and after the positioning block 121 is inserted into the positioning groove, the positioning block 121 and the light guide plate 12 are prevented from being torn after the light guide plate 12 is used for a long time, so that the light guide plate 12 is prevented from swinging left and right, and abnormal sound of the light guide plate 12 is prevented.

As shown in fig. 4, the vehicle-mounted backlight module for preventing the light guide plate from swinging further includes a reflective film 17 and an adhesive tape 16, the reflective film 17 is disposed on the bottom plate 111, the adhesive tape 16 is fixedly connected between the reflective film 17 and the light guide plate 12, the adhesive tape 16 is located on one side of the light guide plate 12 close to the positioning block 121, and the adhesive tape 16 is, for example, a double-sided tape, so that the connection between the light guide plate 12 and the reflective film 17 is stable.

Further, prevent that light guide plate wobbling vehicle-mounted backlight unit still includes optics diaphragm 14, optics diaphragm 14 sets up on light guide plate 12, and optics diaphragm 14 is equipped with second constant head tank (not shown), and one side that light guide plate 12 is close to lamp strip 13 is equipped with second constant head tank complex reference column 122, and reference column 122 sets up in the second constant head tank, and reference column 122 is used for fixing a position optics diaphragm 14, avoids optics diaphragm 14 to rock and produces the abnormal sound.

Further, 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 fixedly connected to the light guide plate 12, the lower brightness enhancement film 142 is fixedly connected to the diffusion film 141, and the upper brightness enhancement film 143 is fixedly connected to the lower brightness enhancement film 142; the fixing connection manner is, for example, a fixing manner such as fixing with a double-sided tape, matching a limiting block with a limiting groove, etc., but not limited thereto.

Further, prevent that wobbling on-vehicle backlight unit of light guide plate still includes shading bubble cotton 15, shading bubble cotton 15 fixed connection on last membrane 143 that adds lustre to, shading bubble cotton 15 sets up around last membrane 143 circumference that adds lustre to, and shading bubble cotton 15 is used for the shading, avoids backlight unit to appear the phenomenon of bright edge.

Second embodiment

The vehicle-mounted backlight module for preventing the light guide plate from swinging of the present embodiment is substantially the same in structure as the vehicle-mounted backlight module for preventing the light guide plate from swinging of the first embodiment, and is different in structure of the positioning block 121.

As shown in fig. 5, the positioning block 121 includes a first side and a second side 1211 disposed opposite to each other, the first side is fixedly connected to the side surface 12a, and two ends of the second side 1211 are respectively connected to the side surface 12a in an arc shape, so as to improve the smoothness of the positioning block 121 inserted into the first positioning groove 101.

The utility model discloses still relate to an on-vehicle display device, including foretell on-vehicle backlight unit who prevents light guide plate wobbling. The on-vehicle display device of the present embodiment is, for example, an on-vehicle center control display, an on-vehicle drive recorder, an on-vehicle DVD navigation, an on-vehicle console integrated display, an on-vehicle streaming rear view mirror, a car seat headrest display, or the like, but is 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 of light guide plate wobbling, its characterized in that, includes lower frame (11), light guide plate (12) and lamp strip (13), lamp strip (13) fixed connection in the inner wall of lower frame (11), lower frame (11) including bottom plate (111) and with bottom plate (111) fixed connection's side frame (112), side frame (112) are equipped with at least one first locating slot (101), light guide plate (12) be equipped with first locating slot (101) complex locating piece (121), locating piece (121) set up in first locating slot (101).

2. The vehicular backlight module for preventing the light guide plate from swinging as claimed in claim 1, wherein the side frame (112) comprises a first side plate (1121), a second side plate (1122), a third side plate (1123) and a fourth side plate (1124), the first side plate (1121) and the second side plate (1122) are arranged oppositely, the third side plate (1123) and the fourth side plate (1124) are arranged oppositely, the first side plate (1121) and the second side plate (1122) are respectively fixedly connected to the third side plate (1123) and the fourth side plate (1124), the light bar (13) is fixedly connected to the first side plate (1121), and the first positioning slot (101) is arranged on the second side plate (1122); or the first positioning groove (101) is arranged on the third side plate (1123); or the first positioning groove (101) is arranged on the fourth side plate (1124).

3. The vehicular backlight module for preventing the light guide plate from swinging as claimed in claim 2, wherein the light guide plate (12) comprises a side surface (12 a), a first surface and a second surface (12 b) which are oppositely arranged, the side surface (12 a) is fixedly connected between the first surface and the second surface (12 b), the first surface is arranged close to the bottom plate (111), and the positioning block (121) is fixedly connected to the side surface (12 a).

4. The on-board backlight module for preventing the light guide plate from swinging as claimed in claim 3, wherein the positioning block (121) includes a first side and a second side (1211) disposed oppositely, and a third side (1212) and a fourth side (1213) disposed oppositely, the first side and the second side (1211) are respectively and fixedly connected to the third side (1212) and the fourth side (1213), the first side is fixedly connected to the side surface (12 a), and the length of the first side is greater than the length of the second side (1211).

5. The vehicular backlight module according to claim 4, wherein the second side (1211) is connected to the third side (1212) in an arc shape, and the second side (1211) is connected to the fourth side (1213) in an arc shape.

6. The backlight module for preventing the swinging of the light guide plate according to claim 5, wherein the third side edge (1212) is connected to the side surface (12 a) in an arc shape, and the fourth side edge (1213) is connected to the side surface (12 a) in an arc shape.

7. The backlight module for preventing light guide plate from swinging as claimed in claim 3, wherein the positioning block (121) comprises a first side and a second side (1211) opposite to each other, the first side is fixedly connected to the side surface (12 a), and two ends of the second side (1211) are respectively connected to the side surface (12 a) in an arc shape.

8. The backlight module for preventing the light guide plate from swinging as claimed in claim 1, further comprising a reflective film (17) and an adhesive tape (16), wherein the reflective film (17) is disposed on the bottom plate (111), the adhesive tape (16) is fixedly connected between the reflective film (17) and the light guide plate (12), and the adhesive tape (16) is located on a side of the light guide plate (12) close to the positioning block (121).

9. The backlight module for preventing swinging of a light guide plate according to claim 8, wherein the backlight module for preventing swinging of a light guide plate further comprises an optical film (14), the optical film (14) is disposed on the light guide plate (12), the optical film (14) is provided with a second positioning groove, a side of the light guide plate (12) close to the light bar (13) is provided with a positioning column (122) engaged with the second positioning groove, and the positioning column (122) is disposed in the second positioning groove.

10. An in-vehicle display device, comprising the in-vehicle backlight module for preventing the light guide plate from swinging of any one of claims 1 to 9.