CN211826591U - Diffusion film and backlight module thereof - Google Patents
Diffusion film and backlight module thereof Download PDFInfo
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- CN211826591U CN211826591U CN202020462371.2U CN202020462371U CN211826591U CN 211826591 U CN211826591 U CN 211826591U CN 202020462371 U CN202020462371 U CN 202020462371U CN 211826591 U CN211826591 U CN 211826591U
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Abstract
The utility model discloses a diffusion barrier and backlight unit thereof, including the printing opacity substrate layer, the top of printing opacity substrate layer is provided with the light diffusion layer, the light diffusion layer is formed by the seamless concatenation of a plurality of regular octagon scattering boards, square scattering board, isosceles triangle scattering board and right angled triangle scattering board, regular octagon scattering board comprises large granule scattering particle, tiny particle scattering particle and resin binder, square scattering board, isosceles triangle scattering board and right angled triangle scattering board comprise well granule scattering particle and resin binder, large granule scattering particle, tiny particle scattering particle and well granule scattering particle's refracting index is all inequality. The utility model provides a diffusion barrier and backlight unit thereof, there is not the gap when the light source throws, and even light effect and colourity are stable better, can compromise the luminance of diffusion barrier when ensureing haze moreover, and whole more balanced is worth promoting very much.
Description
Technical Field
The utility model relates to a diffusion barrier technical field specifically is a diffusion barrier and backlight unit thereof.
Background
Among the prior art, a light diffusion membrane of application number "201810437043.4", including diffusion functional layer, substrate layer and anti-scratch layer, the diffusion functional layer reaches anti-scratch layer set up respectively in on the two relative sides of substrate layer, anti-scratch layer includes interval particle and polyester resin, the diffusion functional layer contains the diffusion particle, the substrate layer is the transparency, and the resin material commonly used among the polyester resin prior art is more soft, thereby has improved the compliance of light diffusion membrane and has promoted the elastic deformation volume on whole light diffusion membrane anti-scratch layer for the light diffusion membrane can not crush the light guide plate in the use, has reached the purpose of protection light guide plate.
However, the method still has the obvious defects in the using process: 1. the device is provided with the diffusion particles and the spacing particles, but gaps still exist at the arc splicing positions, and the gaps can influence the uniformity of the light source in projection, so that the brightness difference between points is large, the device is not perfect in terms of uniformity of light source processing, and the light homogenizing effect and the chromaticity stability are poor; 2. in order to improve the haze, the diffusion particles with smaller particle size are required to be used in the diffusion function layer, so that the luminous flux is inevitably reduced, while in order to improve the brightness, the diffusion particles with relatively larger particle size are required to be used to increase the luminous flux, so that the brightness is difficult to be considered while the haze is improved, the technical requirements for the brightness and the haze of the light diffusion film are contradictory, and the device cannot effectively solve the problem, so that the brightness of the diffusion film is difficult to be improved on the premise of ensuring the haze.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a diffusion barrier and backlight unit thereof to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a diffusion film comprises a light-transmitting base material layer, wherein an anti-scraping layer is arranged below the light-transmitting base material layer, and anti-scraping layer scattering particles are arranged in the anti-scraping layer;
the top of printing opacity substrate layer is provided with the light diffusion layer, the light diffusion layer is formed by the seamless concatenation of a plurality of regular octagon scattering boards, square scattering board, isosceles triangle scattering board and right angle triangle scattering board, regular octagon scattering board comprises large granule scattering particle, tiny particle scattering particle and resin binder, square scattering board, isosceles triangle scattering board and right angle triangle scattering board constitute by well granule scattering particle and resin binder, large granule scattering particle, tiny particle scattering particle and well granule scattering particle's refracting index is all inequality.
Preferably, the particle size of the scattering particles of the scratch-resistant layer is 3-15 micrometers, and the thickness of the scratch-resistant layer is 1.2-2.0 times of the diameter of the scattering particles of the scratch-resistant layer.
Preferably, one side of the scratch-resistant layer, which is far away from the light-transmitting base material layer, is provided with a release film.
Preferably, the particle size of the large-particle scattering particles is 18-30 micrometers, the particle size of the small-particle scattering particles is 6-10 micrometers, the number ratio of the large-particle scattering particles is 8% -15%, the number ratio of the small-particle scattering particles is 85% -92%, and the particle size of the medium-particle scattering particles is 11-16 micrometers.
Preferably, the ratio of the sum of the volumes of the large particle scattering particles and the small particle scattering particles to the volume of the corresponding resin binder is 1: 0.1-1: 0.3, the ratio of the volume of the medium particle scattering particles to the volume of the corresponding resin binder is 1: 0.1-1: 0.3.
A backlight module comprises the diffusion film.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the light diffusion layer of the utility model is formed by seamlessly splicing a plurality of regular octagon scattering plates, square scattering plates, isosceles triangle scattering plates and right-angled triangle scattering plates, and the transition is natural, so that the light homogenizing effect and the chromaticity stability of the diffusion film are better;
2. the utility model discloses a regular octagon scatter plate is by the large granule scattering particle, tiny particle scattering particle and resin binder constitute, the square scatter plate, isosceles triangle scatter plate and right angled triangle scatter plate constitute by well granule scattering particle and resin binder, above-mentioned two kinds of structure intervals set up, tiny particle scattering particle mainly used in the former improves the haze, the large granule scattering particle is used for the light filling, avoid the tiny particle scattering particle too much to lead to luminous flux too little, and well granule scattering particle mainly used in the latter improves luminance, and because its particle diameter is in medium, also can not lead to the point of lighting excessively, whole light sense is more even.
The utility model provides a diffusion barrier and backlight unit thereof, there is not the gap when the light source throws, and even light effect and colourity are stable better, can compromise the luminance of diffusion barrier when ensureing haze moreover, and whole more balanced is worth promoting very much.
Drawings
FIG. 1 is a schematic sectional view of the overall structure of the present invention;
fig. 2 is a schematic diagram of the light diffusion layer of the present invention, which is assembled from a top view (excluding scattering particles).
In the figure: the light-transmitting substrate layer comprises a light-transmitting substrate layer 1, a scratch-resistant layer 2, a scratch-resistant layer 3, scattering particles, a release film 4, a light diffusion layer 5, a regular octagonal scattering plate 511, a square scattering plate 521, an isosceles triangular scattering plate 522, a right-angled triangular scattering plate 523, large-particle scattering particles 6, small-particle scattering particles 7, medium-particle scattering particles 8 and a resin binder 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution:
the utility model provides a diffusion barrier, including printing opacity substrate layer 1, printing opacity substrate layer 1 is PU, PP, PMMA, PET, PC, one or more mixture of vinyl class, the below of printing opacity substrate layer 1 is provided with anti scratch layer 2, anti setting up of scratch layer 2 mainly prevents that printing opacity substrate layer 1 from being cut the piece and scratch appears, can scribble between printing opacity substrate layer 1 and the anti scratch layer 2 and establish antistatic agent layer and anti blue light agent layer, its effect prevents that the diffusion barrier from producing the electrostatic absorption dust in use, too much blue light can cause harmful effects to user's eyesight when also preventing to use, be provided with anti scratch layer scattering particle 3 in the anti scratch layer 2.
The light diffusion layer 5 is arranged above the light-transmitting substrate layer 1, the light diffusion layer 5 is formed by seamlessly splicing a plurality of regular octagonal scattering plates 511, square scattering plates 521, isosceles triangle scattering plates 522 and right-angle triangle scattering plates 523, wherein the regular octagonal scattering plates 511 adopt the proportion of one scattering particle and resin binder 9, the square scattering plates 521, the isosceles triangle scattering plates 522 and the right-angle triangle scattering plates 523 adopt the proportion of another scattering particle and resin binder 9, the former mainly has the function of ensuring haze and preventing the small-particle scattering particles 7 from being too much to cause over-darkness, the latter mainly has the function of improving brightness, the regular octagonal scattering plates 511 are composed of large-particle scattering particles 6, small-particle scattering particles 7 and resin binder 9, and the square scattering plates 521, the isosceles triangle scattering plates 522 and the right-angle triangle scattering plates 523 are all composed of medium-particle scattering particles 8 and resin binder 9, the refractive indices of the large particle scattering particles 6, the small particle scattering particles 7 and the medium particle scattering particles 8 are different.
Preferably, the particle size of the scratch-resistant layer scattering particles 3 is 3-15 microns, and the thickness of the scratch-resistant layer 2 is 1.2-2.0 times of the diameter of the scratch-resistant layer scattering particles 3, so that the scratch-resistant layer 2 can play an effective protection role and cannot lose the effect due to being too thin.
Preferably, the side of the scratch-resistant layer 2 away from the transparent substrate layer 1 is provided with a release film 4, and the release film 4 can prevent the diffusion film from being polluted during storage.
Preferably, the particle size of the large particle scattering particles 6 is 18 to 30 micrometers, the particle size of the small particle scattering particles 7 is 6 to 10 micrometers, the number proportion of the large particle scattering particles 6 is 8 to 15%, and the number proportion of the small particle scattering particles 7 is 85 to 92%, which is related to the particle size of the small particle scattering particles, and the scattering particles with larger particle sizes have correspondingly larger surface areas and smaller numbers, so as to balance the scattering particles with smaller particle sizes, and the particle size of the medium particle scattering particles 8 is 11 to 16 micrometers.
As one preferable, the ratio of the sum of the volumes of the large-particle scattering particles 6 and the small-particle scattering particles 7 to the volume of the corresponding resin binder 9 is 1: 0.1-1: 0.3, wherein the corresponding resin binder 9 refers to the resin binder 9 in the regular octagonal scattering plate 511, and the ratio of the volume of the medium particle scattering particles 8 to the volume of the corresponding resin binder 9 is 1: 0.1-1: 0.3, wherein the corresponding resin adhesive 9 refers to the resin adhesive 9 in the square scattering plate 521, the isosceles triangle scattering plate 522 and the right-angle triangle scattering plate 523.
A backlight module comprises the diffusion film.
The working principle is as follows: when the light guide plate is used, the release film 4 is taken down, the light guide plate irradiates to the diffusion film from the lower part, the light source firstly reaches the light-transmitting base material layer 1 through the scratch-resistant layer 2, the scratch-resistant layer scattering particles 3 in the scratch-resistant layer 2 preliminarily atomize the light source, then the light source penetrates through the light-transmitting base material layer 1 to reach the light diffusion layer 5, the light diffusion layer 5 is formed by splicing a plurality of regular octagonal scattering plates 511, square scattering plates 521, isosceles triangle scattering plates 522 and right-angled triangle scattering plates 523 in a seamless mode, the light uniformizing effect and the chromaticity are better, the regular octagonal scattering plates 511 are composed of large-particle scattering particles 6, small-particle scattering particles 7 and resin binders 9 and are mainly used for ensuring the haze of the diffusion film, and the large-particle scattering particles 6 are arranged to avoid local over-darkness caused by too many small-particle scattering particles 7; the square scattering plate 521, the isosceles triangle scattering plate 522 and the right-angle triangle scattering plate 523 are all composed of medium particle scattering particles 8 and resin binder 9, and mainly have the effects of improving the brightness of the diffusion film on the premise of ensuring the haze, and because the particle size of the diffusion film is medium, over-bright points cannot be caused, and the overall light sensation is more uniform.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A diffusion film, includes a light-transmitting substrate layer (1), its characterized in that: an anti-scratch layer (2) is arranged below the light-transmitting substrate layer (1), and anti-scratch layer scattering particles (3) are arranged in the anti-scratch layer (2);
the light-transmitting substrate layer (1) is provided with light diffusion layer (5) above, light diffusion layer (5) are formed by seamlessly splicing a plurality of regular octagon scattering plates (511), square scattering plates (521), isosceles triangle scattering plates (522) and right-angled triangle scattering plates (523), regular octagon scattering plates (511) are composed of large-particle scattering particles (6), small-particle scattering particles (7) and resin binder (9), square scattering plates (521), isosceles triangle scattering plates (522) and right-angled triangle scattering plates (523) are composed of medium-particle scattering particles (8) and resin binder (9), and the refractive indexes of large-particle scattering particles (6), small-particle scattering particles (7) and medium-particle scattering particles (8) are different.
2. A diffusion membrane according to claim 1, wherein: the particle size of the scratch-resistant layer scattering particles (3) is 3-15 micrometers, and the thickness of the scratch-resistant layer (2) is 1.2-2.0 times of the diameter of the scratch-resistant layer scattering particles (3).
3. A diffusion membrane according to claim 1, wherein: one side of the scratch-resistant layer (2) far away from the light-transmitting base material layer (1) is provided with a release film (4).
4. A diffusion membrane according to claim 1, wherein: the particle size of the large-particle scattering particles (6) is 18-30 micrometers, the particle size of the small-particle scattering particles (7) is 6-10 micrometers, and the particle size of the medium-particle scattering particles (8) is 11-16 micrometers.
5. A backlight module is characterized in that: comprising a diffusion membrane according to any of the preceding claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020462371.2U CN211826591U (en) | 2020-04-02 | 2020-04-02 | Diffusion film and backlight module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020462371.2U CN211826591U (en) | 2020-04-02 | 2020-04-02 | Diffusion film and backlight module thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211826591U true CN211826591U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020462371.2U Active CN211826591U (en) | 2020-04-02 | 2020-04-02 | Diffusion film and backlight module thereof |
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|---|---|
| CN (1) | CN211826591U (en) |
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2020
- 2020-04-02 CN CN202020462371.2U patent/CN211826591U/en active Active
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Address after: 230012 The first floor of Phase I plant of Boxun Optoelectronics Technology (Hefei) Co., Ltd. at the intersection of Yuhuangshan Road and Dayu Road, Xinzhan District, Hefei, Anhui Province Patentee after: Hefei Xingchen New Materials Co.,Ltd. Address before: 230012 plant of Hanbo high tech materials (Hefei) Co., Ltd., north of Tianshui Road, Xinzhan District, Hefei City, Anhui Province Patentee before: HEFEI HANBOGAOXIN NEW MATERIAL CO.,LTD. |
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