CN211455152U

CN211455152U - Improve not hard up on-vehicle backlight unit of light guide plate and on-vehicle display screen

Info

Publication number: CN211455152U
Application number: CN202020541303.5U
Authority: CN
Inventors: 曹俊威; 冯超
Original assignee: Shenzhen Hadbest Electronics Co ltd
Current assignee: Shenzhen Hadbest Electronics Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-09-08
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses an improve not hard up on-vehicle backlight unit of light guide plate, including light guide plate, setting with reflective membrane, the setting of the relative surperficial below of light guide plate play plain noodles are in the light source of light guide plate income plain noodles side, and be used for the laminating the reflective membrane with the first double faced adhesive tape of light guide plate, the reflective membrane includes bottom and three turn-ups, wherein, the laminating is glued to first double faced adhesive tape arbitrary in three turn-ups the turn-ups inboard with the light guide plate side, and extend to the laminating the upper surface of bottom with the relative surface of light guide plate play plain noodles. The utility model also discloses an on-vehicle display screen, including foretell on-vehicle backlight unit that improves the light guide plate and become flexible. Through above-mentioned structure, increased and pasted the face, effectively solved and prevented the not hard up abnormal sound that the light guide plate produced at backlight unit, improved the reliability of product greatly.

Description

Improve not hard up on-vehicle backlight unit of light guide plate and on-vehicle display screen

Technical Field

The utility model relates to an on-vehicle demonstration technical field especially relates to an improve not hard up on-vehicle backlight unit of light guide plate and on-vehicle display screen.

Background

The greatest change in automobile development in recent years is the higher and higher configuration, wherein the greatest change in interior decoration is that the display screen in the automobile is used more and more, the size of the display screen is larger and larger, the luxury degree and the experience are better and better, therefore, the demand for automobile consumption is increasingly expanded in recent years, China also becomes one of the countries with the fastest global automobile market growth, and the demand brought by the automobile electronic industry is also very beneficial. The reliability quality requirement of the display screen module in the automobile industry is much higher than that of consumer electronics, wherein the problem which most easily troubles automobile assembly manufacturers and consumers is abnormal sound in an automobile, if the conventional display screen module is slightly insufficient in design or material management and control, abnormal sound is easily caused in the driving process of the automobile, one factor of the abnormal sound generated by the display screen module is the loose abnormal sound of a light guide plate from the inside of a backlight source, countermeasures are required to be taken in the design for fixing the light guide plate, and the conventional design is that the light guide plate is fixed by limiting the silica gel inside a lower iron frame through edges or corners so as to achieve the relative fixation of the light guide plate without generating the loose abnormal sound. But because the discreteness in actual production and management and control process, can cause the light guide plate in iron frame inside under and the continuous vibrations extrusion of silica gel, make silica gel receive the compression can not kick-back, produce certain gap between light guide plate and the silica gel, the violent jolting of driving in-process, the sound of light guide plate production striking. Therefore, it is necessary to continuously optimize and improve the fixing mode of the light guide plate to prevent the problem of light guide plate looseness and abnormal sound in the later period.

The foregoing description is provided for general background information and is not admitted to be prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improve the not hard up on-vehicle backlight unit of light guide plate and on-vehicle display screen, paste the face and solve the not hard up purpose of light guide plate in can utilizing the increase.

The utility model provides an improve not hard up on-vehicle backlight unit of light guide plate, including light guide plate, setting with reflective membrane, the setting of the relative surperficial below of light guide plate play plain noodles are in the light source of light guide plate income plain noodles side, and be used for the laminating the reflective membrane with the first double faced adhesive tape of light guide plate, the reflective membrane includes bottom and three turn-ups, wherein, the laminating is glued to first double faced adhesive tape arbitrary in three turn-ups the turn-ups inboard with the light guide plate side, and extend to the laminating the upper surface of bottom with the relative surface of light guide plate play plain noodles.

In one embodiment, the width of the part of the first double-sided adhesive extending to the bottom is greater than 1.0 mm.

In one embodiment, the edge of the portion of the first double-sided adhesive extending to the bottom is more than 1.0mm away from the light emitting region of the light guide plate.

In one embodiment, the double-sided tape is disposed on one side of a long side of the light guide plate, and the long side is not a light incident side of the light guide plate.

In one embodiment, the backlight module further comprises a second double-sided adhesive and a lower iron frame, wherein the second double-sided adhesive is strip-shaped, the lower iron frame comprises a bottom plate and a frame arranged around the bottom plate, the lower iron frame contains the light guide plate, the reflective film, the light source, the first double-sided adhesive and the second double-sided adhesive, and the second double-sided adhesive is arranged between the reflective film and the lower iron frame.

In one embodiment, the second double-sided adhesive is attached to the outer side of the flange and the inner side of the frame.

In one embodiment, the second double-sided adhesive is attached to the lower surface of the bottom and the upper surface of the bottom plate.

In one embodiment, the reflective film further comprises silica gel, the silica gel is arranged at two ends of the lower iron frame at the same side, and the silica gel is in contact with the side face of the reflective film.

The utility model also provides an on-vehicle display screen, improve the not hard up on-vehicle backlight unit of light guide plate including the aforesaid.

The utility model provides an improve not hard up on-vehicle backlight unit of light guide plate, through the laminating is glued to first double faced adhesive tape arbitrary one in three turns-ups the turn-ups inboard with the light guide plate side, and extend to the laminating the upper surface of bottom with the surface that the light guide plate goes out the plain noodles is relative has increased and has pasted the face, effectively solves and prevents the not hard up abnormal sound that the light guide plate produced at backlight unit, has improved the reliability of product greatly.

Drawings

Fig. 1 is a structural diagram of a reflection film and a first double-sided adhesive according to an embodiment of the present invention after being attached;

FIG. 2 is a block diagram of another perspective of FIG. 1;

fig. 3 is a structural diagram of the embodiment of the present invention, which improves the looseness of the light guide plate.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 to 3, an embodiment of the present invention provides a vehicle-mounted backlight module for improving light guide plate looseness, including a light guide plate 4, a reflective film 3 disposed below a surface opposite to a light exit surface of the light guide plate 4, a light source 2 disposed at a light entrance side of the light guide plate 4, and a first double-sided adhesive 91 for attaching the reflective film 3 to the light guide plate 4. The reflective film 3 includes a bottom and three flanges. The first double-sided adhesive 91 is attached to the inner side of any one of the three flanges and the side face of the light guide plate 4, and extends to the surface of the attached bottom, which is opposite to the light-emitting surface of the light guide plate 4.

The three flanges of the reflective film 3 are not disposed on the side close to the light source 2, so as to prevent the light emitted from the light source 2 from entering the light guide plate 3 from the light incident side of the light guide plate 3.

The first double-sided adhesive 91 is disposed on one side of the long side of the light guide plate 4, and the long side is the non-incident side of the light guide plate 4. Thus, the bonding area of the first double-sided adhesive 91 can be ensured, and the light emitting effect of the light guide plate 4 is not affected.

The width of the portion of the first double-sided adhesive 91 extending to the bottom of the reflective film 3 is greater than 1.0mm, thereby minimally securing the fixing effect to the light guide plate 4. However, if the first double-sided adhesive 91 extends too long, the light emitting brightness of the light guide plate 4 is affected, and therefore, the edge of the portion of the first double-sided adhesive 91 extending to the bottom of the reflective film 3 is more than 1.0mm away from the light emitting area of the light guide plate 4.

In this embodiment, the thickness of the first double-sided adhesive is 0.05 mm; the material is double-sided adhesive tape which is resistant to high temperature and does not turn yellow, such as double-sided adhesive tape with the model number of 3M/55256P.

Improve the not hard up on-vehicle backlight unit of light guide plate still includes the second double faced adhesive tape 92 and the chase 1 down that are the bar. The lower bezel 1 includes a bottom plate 11 and a frame 12 surrounding the bottom plate 11, and the lower bezel 1 accommodates the light guide plate 4, the reflective film 3, the light source 2, the first double-sided adhesive 91, and the second double-sided adhesive 92. The second double-sided adhesive 91 is attached to the lower surface of the bottom of the reflective film 3 and the upper surface of the bottom plate 11 of the lower bezel 1 to fix the reflective film 3, thereby achieving the purpose of fixing the light guide plate 4.

Specifically, the second double-sided adhesive 92 is selected to be as thick as possible, and the length of the second double-sided adhesive 92 is 1/2-2/3 of the length of the lower iron frame 1; when the width of the adopted second double-sided adhesive 92 is less than 9 inches, preferably, the width of the second double-sided adhesive is 5-10 mm; when the width of the second double-sided adhesive 92 is more than 9 inches, the width of the second double-sided adhesive 92 is preferably 10-15 mm.

In this embodiment, the thickness of the second double-sided adhesive 92 is 0.1mm, and the material thereof may be double-sided adhesive of type TESA/4982 or 3M/55261P.

In other embodiments, the second double-sided adhesive 92 is attached to the outside of the flange of the reflective film 3 and the inside of the bezel 12 of the lower bezel 1. At this time, the length of the second double-sided adhesive 92 is greater than 1.5mm, but does not exceed the length of the long edge of the lower iron frame 1, and the width does not exceed the edge of the frame 12 of the lower iron frame 1; preferably, the thickness of the second double-sided adhesive 92 is 0.05mm, and the material thereof may be double-sided adhesive of type TESA/4972 or 3M/55256P.

Of course, the second double-sided adhesive 92 may also be provided in plurality, so that one of the second double-sided adhesive 92 may be attached to the outer side of the flange of the reflective film 3 and the inner side of the frame 12 of the lower bezel 1, and the other second double-sided adhesive 92 may be attached to the lower surface of the bottom of the reflective film 3 and the upper surface of the bottom plate 11 of the lower bezel 1.

Improve the not hard up on-vehicle backlight unit of light guide plate still includes silica gel 10, and silica gel 10 sets up at the both ends of iron frame with one side down, and the side contact of silica gel 10 and reflectance coating 3. The number of the silica gel 10 is 2, wherein one silica gel is in a straight shape, and the other silica gel is in an L shape; the L-shaped silica gel 10 is disposed at the intersection of two adjacent frames 1, so that the light guide plate 4 is horizontally fixed.

The vehicle-mounted backlight module for improving the looseness of the light guide plate further comprises a diffusion Film 5, a Brightness Enhancement Film 6, a DBEF (Dual Brightness Enhancement Film)7 and a middle iron frame 8 from bottom to top. The diffusion film 5 is disposed on the light-emitting surface of the light guide plate 4, and the middle bezel 8 and the lower bezel 1 engage with each other to accommodate the reflection film 3, the first double-sided adhesive 91, the second double-sided adhesive 92, the light source 2 diffusion film 5, the brightness enhancement film 6, and the DBEF 7.

The utility model also provides a display device, including foretell vehicle-mounted backlight.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the sake of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

As used herein, 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.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an improve not hard up on-vehicle backlight unit of light guide plate, its characterized in that, including the light guide plate, set up with the reflection film, the setting of the relative surperficial below of light guide plate play plain noodles are in the light source of light guide plate income light side, and be used for the laminating the reflection film with the first double faced adhesive tape of light guide plate, the reflection film includes bottom and three turn-ups, wherein, the laminating is glued to first double faced adhesive tape arbitrary in three turn-ups the turn-ups inboard with the light guide plate side, and extend to the laminating the upper surface of bottom with the relative surface of light guide plate play plain noodles.

2. The vehicular backlight module for improving the looseness of the light guide plate according to claim 1, wherein a width of a portion of the first double-sided adhesive extending to the bottom is greater than 1.0 mm.

3. The vehicular backlight module for improving the looseness of the light guide plate according to claim 1, wherein an edge of a portion of the first double-sided adhesive extending to the bottom is more than 1.0mm away from a light emitting region of the light guide plate.

4. The vehicular backlight module for improving the looseness of the light guide plate according to claim 1, wherein the first double-sided adhesive is disposed on one side of a long side of the light guide plate, and the long side is a non-light-incident side of the light guide plate.

5. The vehicular backlight module for improving the looseness of the light guide plate according to claim 1, further comprising a second double-sided adhesive and a lower iron frame in a strip shape, wherein the lower iron frame comprises a bottom plate and a frame surrounding the bottom plate, the lower iron frame accommodates the light guide plate, the reflective film, the light source, the first double-sided adhesive and the second double-sided adhesive, and the second double-sided adhesive is disposed between the reflective film and the lower iron frame.

6. The on-vehicle backlight module for improving the looseness of the light guide plate of claim 5, wherein the second double-sided adhesive is attached to the outer side of the turned-up edge and the inner side of the frame.

7. The vehicular backlight module for improving the looseness of the light guide plate according to claim 5, wherein the second double-sided adhesive is attached to the lower surface of the bottom part and the upper surface of the bottom plate.

8. The on-vehicle backlight module for improving the looseness of the light guide plate according to claim 5, further comprising silica gel, wherein the silica gel is disposed at both ends of the same side of the lower iron frame, and the silica gel is in contact with the side surface of the reflection film.

9. An on-vehicle display screen, characterized in that, include according to any claim 1 to 8 of the on-vehicle backlight module of light guide plate looseness of improvement.