Backlight module and display device
阅读说明:本技术 背光模组和显示装置 (Backlight module and display device ) 是由 王姮若 李伟 于 2020-07-15 设计创作,主要内容包括:本发明公开了一种背光模组和显示装置。其中,该背光模组包括导光板,所述导光板具有呈相对设置的出光面和底面、以及连接所述出光面和所述底面的入光面,所述底面设有微结构,所述微结构为自所述底面向外延伸而成的至少两个导光块;光源,所述光源和所述入光面呈相对设置;以及光学膜片,所述光学膜片和所述出光面呈相对设置。本发明技术方案能够提高背光模组的出光效果,同时保证了光线的使用效率,也使其可以有效的控制出光角度。(The invention discloses a backlight module and a display device. The backlight module comprises a light guide plate, wherein the light guide plate is provided with a light emitting surface, a bottom surface and a light incident surface, the light emitting surface and the bottom surface are oppositely arranged, the light incident surface is connected with the light emitting surface and the bottom surface, the bottom surface is provided with a microstructure, and the microstructure is at least two light guide blocks formed by extending outwards from the bottom surface; the light source and the light incident surface are oppositely arranged; and the optical film and the light-emitting surface are oppositely arranged. The technical scheme of the invention can improve the light-emitting effect of the backlight module, ensure the use efficiency of light rays and effectively control the light-emitting angle.)
1. A backlight module, comprising:
the light guide plate is provided with a light emitting surface, a bottom surface and a light incident surface, wherein the light emitting surface and the bottom surface are oppositely arranged, the light incident surface is connected with the light emitting surface and the bottom surface, the bottom surface is provided with a microstructure, and the microstructure is at least two light guide blocks formed by extending outwards from the bottom surface;
the light source and the light incident surface are oppositely arranged; and
the optical film is arranged opposite to the light emergent surface.
2. The backlight module as claimed in claim 1, wherein the light guide block has a triangular cross section, and the light guide block includes a first extending edge and a second extending edge connected to the bottom surface, and an included angle α is defined between the first extending edge and the bottom surface, and the α is disposed at an acute angle.
3. The backlight module as claimed in claim 2, wherein α is 1 ° or more and 10 ° or less.
4. The backlight module according to claim 1, wherein at least two of the light guide blocks are disposed on the bottom surface continuously or at intervals along a direction of the light source facing the light guide plate.
5. The backlight module according to any one of claims 1 to 4, further comprising a reflective sheet, wherein the reflective sheet is disposed opposite to the bottom surface.
6. The backlight module as claimed in claim 5, wherein the reflective sheet is made of silver.
7. The backlight module of claim 5, further comprising a prism sheet disposed between the reflective sheet and the bottom surface.
8. The backlight module according to any one of claims 1 to 4, wherein a reflective film is disposed on a portion of the bottom surface adjacent to the light incident surface;
or the light guide plate further comprises a side face which is opposite to the light incident face and connected with the light emergent face and the bottom face, the side face is provided with a reflecting film, and the reflecting film is arranged to cover the side face and extend to be turned over and cover part of the bottom face.
9. The backlight module of claim 8, wherein the reflective film is a low reflection film or a low haze film.
10. The backlight module of claim 8, wherein the reflective film is a low reflection coating or a low haze film coating.
11. The backlight module according to any of claims 1-4, wherein the optical film is designed according to the transmittance of the matched glass in the dark state viewing angle, so that the optical film reduces the light emitted from the matched glass in the dark state to form a high contrast ratio.
12. The backlight module according to any of claims 1-4, wherein the optical film comprises an inverse prism film.
13. The backlight module according to claim 12, wherein the surface of the prism film facing the light guide plate forms a sawtooth structure, the sawtooth structure is matched with the microstructures for increasing light reflection, and the sawtooth structure is configured to modulate incident light and emergent light of the inverse prism film to form a 90 ° included angle.
14. The backlight module according to claim 12, wherein the optical film further comprises a diffusion film and a polarizer, and the diffusion film and the polarizer are sequentially disposed along a direction of the light guide plate facing the prism film.
15. The backlight module according to any one of claims 1 to 4, wherein the light source is a quantum dot LED;
or the light source is a combination of quantum powder and LED crystal grains.
16. The backlight module according to any one of claims 1 to 4, wherein a quantum dot film is disposed between the light source and the light incident surface.
17. A display device comprising the backlight module according to any one of claims 1 to 16.
Technical Field
The present invention relates to a display device, and more particularly, to a backlight module and a display device using the same.
Background
The backlight module generally includes a light source, a light guide plate and an optical film, wherein light emitted from the light source is guided to the optical film through the light guide plate. However, the light guide plate of the backlight module in the related art has poor light condensing performance, so that the intensity of light transmitted to the optical film through the light guide plate is weak, and the light emitting effect of the backlight module is reduced. Meanwhile, partial light is easy to leak from the side surface of the light guide plate of the backlight module in the related art, the leaked partial light can form a light package after being diffused and emitted by the backlight module, and the formation of the light package can not only reduce the use efficiency of the light, but also cause that the backlight module cannot effectively control the light emitting angle.
Disclosure of Invention
The present invention provides a backlight module, which aims to improve the light-emitting effect of the backlight module, ensure the utilization efficiency of light and effectively control the light-emitting angle.
The invention provides a backlight module, comprising:
the light guide plate is provided with a light emitting surface, a bottom surface and a light incident surface, wherein the light emitting surface and the bottom surface are oppositely arranged, the light incident surface is connected with the light emitting surface and the bottom surface, the bottom surface is provided with a microstructure, and the microstructure is at least two light guide blocks formed by extending outwards from the bottom surface;
the light source and the light incident surface are oppositely arranged; and
the optical film is arranged opposite to the light emergent surface.
In an embodiment of the present invention, a cross section of the light guide block is triangular, the light guide block includes a first extending edge and a second extending edge connected to the bottom surface, an included angle α between the first extending edge and the bottom surface is defined, and the α is disposed at an acute angle.
In an embodiment of the present invention, α is greater than or equal to 1 ° and less than or equal to 10 °.
In an embodiment of the invention, at least two of the light guide blocks are continuously disposed or spaced apart on the bottom surface along a direction in which the light source faces the light guide plate.
In an embodiment of the invention, the backlight module further includes a reflective sheet, and the reflective sheet and the bottom surface are oppositely disposed.
In an embodiment of the invention, the reflective sheet is made of silver.
In an embodiment of the invention, the backlight module further includes a prism sheet disposed between the reflective sheet and the bottom surface.
In an embodiment of the invention, a reflective film is disposed on a portion of the bottom surface close to the light incident surface;
or the light guide plate further comprises a side face which is opposite to the light incident face and connected with the light emergent face and the bottom face, the side face is provided with a reflecting film, and the reflecting film is arranged to cover the side face and extend to be turned over and cover part of the bottom face.
In an embodiment of the invention, the reflective film is a low-reflection film or a low-haze film.
In an embodiment of the present invention, the reflective film is a low reflective coating or a low haze film coating.
In an embodiment of the invention, the optical film is designed according to the transmittance of the matched glass in a dark state viewing angle, so that the optical film reduces the dark state light emission of the matched glass to form high contrast.
In an embodiment of the invention, the optical film includes an inverse prism film.
In an embodiment of the invention, a sawtooth structure is formed on the surface of the prism film facing the light guide plate, the sawtooth structure is matched with the microstructure and used for increasing light reflection, and the sawtooth structure is configured to modulate incident light and emergent light of the inverse prism film to form a 90-degree included angle.
In an embodiment of the present invention, the optical film further includes a diffusion film and a polarizer, and the diffusion film and the polarizer are sequentially distributed along a direction of the light guide plate facing the prism film.
In an embodiment of the present invention, the light source is a quantum dot LED;
or the light source is a combination of quantum powder and LED crystal grains.
In an embodiment of the invention, a quantum dot film is disposed between the light source and the light incident surface.
The invention also provides a display device, which comprises a backlight module, wherein the backlight module comprises:
the light guide plate is provided with a light emitting surface, a bottom surface and a light incident surface, wherein the light emitting surface and the bottom surface are oppositely arranged, the light incident surface is connected with the light emitting surface and the bottom surface, the bottom surface is provided with a microstructure, and the microstructure is at least two light guide blocks formed by extending outwards from the bottom surface;
the light source and the light incident surface are oppositely arranged; and
the optical film is arranged opposite to the light emergent surface.
When the backlight module is used, light emitted by the light source can enter the light guide plate through the light inlet surface of the light guide plate, and then can be totally reflected in the light guide plate and emitted from the light outlet surface of the light guide plate to be transmitted to the optical film, so that the process of converting a point light source or a linear light source into a surface light source is completed. Because the bottom surface of the light guide plate of the backlight module is provided with the microstructure, the exit angle of the light emitted from the light exit surface of the light guide plate can be reduced through the microstructure, so that the light emitted from the light exit surface of the light guide plate is gathered and transmitted to the optical membrane to enhance the intensity of the light, and the light emitting effect of the backlight module is improved. Moreover, the transmission path of the light emitted by the light source can be changed through the microstructure, so that the light entering the light guide plate can be normally emitted from the light emitting surface of the light guide plate, and the possibility of leakage and emission from the side surface of the light guide plate is reduced. So make backlight unit in this scheme can not appear the light package, and then guaranteed the availability factor of light, also realized carrying out effectual control to backlight unit's light-emitting angle.
Furthermore, the microstructures of the light guide plate are at least two light guide blocks formed by extending outwards from the bottom surface of the light guide plate, so that the microstructures are exposed on the outer surface of the light guide plate, the complexity of forming the microstructures is reduced, the light guide plate is convenient to manufacture and form, and the manufacturing efficiency of the backlight module can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of an overall structure of a backlight module according to an embodiment of the present invention;
fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a backlight module.
Referring to fig. 1, in an embodiment of the present invention, the backlight module includes a
In an embodiment of the invention, the
When the backlight module according to the technical scheme of the invention is used, light emitted by the
Furthermore, the microstructures 17 of the
Referring to fig. 1 and fig. 2, in an embodiment of the invention, the cross section of the
It can be understood that the included angle α between the first extending
Referring to fig. 1, in an embodiment of the invention, at least two light guide blocks 171 are disposed on the
It can be understood that at least two light guide blocks 171 are continuously disposed, so as to increase the distribution area of the micro-structures 17 on the
In an embodiment of the present invention, the backlight module further includes a reflective sheet 70, and the reflective sheet 70 and the
It is understood that the light transmitted from the
In an embodiment of the present invention, the reflective sheet 70 is made of silver.
It can be understood that the reflective sheet 70 made of silver material can improve the light reflection of the reflective sheet 70 due to the high reflectivity of the silver material. Of course, the present application is not limited thereto, and in other embodiments, the material of the reflective sheet 70 may be aluminum, copper, white PET (polyethylene terephthalate), or the like.
In an embodiment of the invention, the backlight module further includes a prism sheet 5580, and the prism sheet 5580 is disposed between the reflective sheet 70 and the
It can be understood that, since the prism sheet 5580 can condense the diffused light within a certain angle, that is, can condense the light emitted from the reflective sheet 70, the intensity of the reflected light is increased, and the intensity of the reflected light re-incident into the
In an embodiment of the present invention, a portion of the
or, the
It is understood that the
In one embodiment of the present invention, the optical film 50 includes an inverse prism film 51.
It can be understood that the light emitted from the light-emitting surface 11 of the
In an embodiment of the present invention, the optical film 50 further includes a diffusion film 53 and a polarizer, and the diffusion film 53 and the polarizer are sequentially distributed along a direction of the
It can be understood that the light emitted from the light-emitting surface 11 of the
In one embodiment of the present invention, the
It can be understood that the
The present invention further provides a display device, which includes a backlight module, and the specific structure of the backlight module refers to the above embodiments, and since the display device adopts all the technical solutions of all the above embodiments, the display device at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
The display device can be a liquid crystal television, a notebook, a tablet or a mobile phone.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
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