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CN106908875B - Brightness enhancement film, backlight module and display device - Google Patents

Brightness enhancement film, backlight module and display device Download PDF

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Publication number
CN106908875B
CN106908875B CN201710201304.8A CN201710201304A CN106908875B CN 106908875 B CN106908875 B CN 106908875B CN 201710201304 A CN201710201304 A CN 201710201304A CN 106908875 B CN106908875 B CN 106908875B
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Prior art keywords
brightness enhancement
enhancement film
micro
protrusion
application
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CN201710201304.8A
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CN106908875A (en
Inventor
丁清华
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Zhangjiagang Kangdexin Optronics Material Co Ltd
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Zhangjiagang Kangdexin Optronics Material Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/04Prisms
    • G02B5/045Prism arrays

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)

Abstract

This application provides a kind of brightness enhancement film, backlight module and display devices.The brightness enhancement film includes prism layer, and prism layer includes the micro-structure of multiple prism-likes being arranged successively, and the material of micro-structure is elastic material, and the top of at least one micro-structure is provided with protrusion, and the material of each protrusion is non-elastic material.In the brightness enhancement film, stiff protrusion is set at least one micro-structure of prism layer, when by brightness enhancement film application in a display device, since the hardness of raised material is larger, in the effect by power, deformation is less likely to occur, and then is stained with glutinous problem caused by can directly contacting to avoid micro-structure with the other materials layer in protrusion, so that more uniform using the display picture of the display device of the brightness enhancement film and no biggish dirty sense.

Description

Brightness enhancement film, backlight module and display device
Technical field
This application involves display fields, in particular to a kind of brightness enhancement film, backlight module and display device.
Background technique
As shown in Figure 1, brightness enhancement film 1'(is referred to as prismatic lens according to external form), as disclosed by patent No. US4883341, by folding The promotion of luminous efficiency is realized in the application of setting rate and geometric optics.Patent No. US5161041, which is disclosed, is applied to brightness enhancement film In flat-panel screens, for improving the luminous intensity of display forward direction, this belongs to quite mature technology.
Brightness enhancement film is most important at present uses difficult point, is that its surface micro-structure is destroyed vulnerable to external force, causes the flaw of picture Defect, there are many solutions at present.
Such as improving the pressure-resistant, wear-resisting of membrane surface, scratch-resistant characteristic, on the one hand predominantly two aspects change The material of brightness enhancement film, such as the patent application of Publication No. CN104749682A and CN104629575A are disclosed using resilience Material form brightness enhancement film to promote the wearability of diaphragm;On the other hand change the micro-structure of brightness enhancement film, such as by prism vertex angle Passivation, the patent application of Publication No. CN1902511A and CN101981474A, which are disclosed through the change of micro-structure external form, to be mentioned The technical solution of high-wearing feature.The former mainly improves Wear Resistance by the elasticity of material, and the latter is by reducing micro-structure A possibility that being destroyed promotes wearability.
Brightness enhancement film formed by elastic material, though the micro-structure that can solve brightness enhancement film is easy the problem of fraying, by In the raising of material viscoelasticity, it will cause and be stained with glutinous problem between brightness enhancement film and the diaphragm for being in contact with it setting, display device is come It says, is stained with the picture that glutinous problem can make display screen show uneven or dirty sense.
Summary of the invention
The main purpose of the application is to provide a kind of brightness enhancement film, backlight module and display device, to alleviate the prior art In the brightness enhancement film that is formed of elastic material be stained with glutinous problem.
To achieve the goals above, according to the one aspect of the application, a kind of brightness enhancement film is provided, which includes: Prism layer, the micro-structure including multiple prism-likes being arranged successively, the material of above-mentioned micro-structure are elastic material, at least one The top for stating micro-structure is provided with protrusion, and the material of each above-mentioned protrusion is non-elastic material.
Further, above-mentioned elastic material includes ethoxy group.
Further, the top of each above-mentioned micro-structure is provided with a protrusion.
Further, the surface far from above-mentioned micro-structure of above-mentioned protrusion includes cambered surface and/or plane.
Further, the refractive index of above-mentioned protrusion is n1, the refractive index of above-mentioned micro-structure is n2, | n1-n2|<0.01。
Further, above-mentioned non-elastic material is selected from bis-phenol (methyl) acrylate acrylate, bisphenol fluorene (methyl) third One of olefin(e) acid ester, urethane acrylate and polyester acrylate are a variety of.
Further, above-mentioned brightness enhancement film further include: the surface of the not set above-mentioned protrusion of prism layer is arranged in substrate layer On.
Further, the material of above-mentioned substrate layer is selected from one of PET, PE and PEN or a variety of.
To achieve the goals above, according to further aspect of the application, a kind of backlight module is provided, the backlight module Including brightness enhancement film, which is any of the above-described kind of brightness enhancement film.
To achieve the goals above, according to the application's in another aspect, provide a kind of display device, the display device packet Backlight module is included, which is above-mentioned backlight module.
Using the technical solution of the application, stiff protrusion is set at least one micro-structure of prism layer, by this When brightness enhancement film is applied in a display device, since the hardness of raised material is larger, in the effect by power, it is not easy to shape occur Become, and then be stained with glutinous problem caused by can directly contacting to avoid micro-structure with the other materials layer in protrusion, so that answering More uniform with the display picture of the display device of the brightness enhancement film and no biggish dirty sense.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 shows a kind of structural schematic diagram of brightness enhancement film in the prior art;
Fig. 2 shows the structural schematic diagrams for the brightness enhancement film that a kind of embodiment of the application provides;And
The structural schematic diagram for the brightness enhancement film that another embodiment that Fig. 3 shows the application provides.
Wherein, the above drawings include the following reference numerals:
1', brightness enhancement film;1, substrate layer;2, prism layer;3, raised;20, micro-structure.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, brightness enhancement film in the prior art improves the wear-resisting resistance to of diaphragm using elastic material For scraping characteristic, but elastic material will cause and be stained with glutinous problem, and in order to alleviate technical problem as above, present applicant proposes one Kind brightness enhancement film, backlight module and display device.
In a kind of typical embodiment of the application, a kind of brightness enhancement film is provided, as shown in Fig. 2, the brightness enhancement film packet Prism layer 2 is included, the micro-structure 20 including multiple prism-likes being arranged successively, the material of above-mentioned micro-structure 20 is elastic material, until The top of a few above-mentioned micro-structure 20 is provided with protrusion 3, and each above-mentioned raised 3 material is non-elastic material.
Differentiation according to this field to elastic material and non-elastic material, the shore hardness of elastic material generally 19~ Between 40D, the shore hardness of non-elastic material is generally between 70~95D.
In above-mentioned brightness enhancement film, stiff protrusion is set at least one micro-structure of prism layer, by the brightness enhancement film Using in a display device when, since the hardness of raised material is larger, in the effect by power, it is not easy to deformation occurs, into And it is stained with glutinous problem caused by can directly contacting to avoid micro-structure with the other materials layer in protrusion, so that using the increasing The display picture of the display device of bright film is more uniform and without biggish dirty sense.
In a kind of embodiment of the application, above-mentioned elastic material includes ethoxy group, which provides elasticity, into one Step guarantees the elasticity of micro-structure.
In order to further eliminate glutinous problem of being stained with, in a kind of embodiment of the application, as shown in Fig. 2, each above-mentioned micro-structure 20 Top be provided with a protrusion 3.
In another embodiment of the application, above-mentioned raised 3 far from above-mentioned micro-structure 20 surface include cambered surface and/or Plane.That is the surface far from above-mentioned micro-structure 20 of the protrusion 3 can only include cambered surface, as shown in Figure 2 and Figure 3;? It can only include plane, i.e., multiple planes are connected to form protrusion;It can also be both including cambered surface or including plane.Those skilled in the art Member can according to the actual situation set the surface to the surface of suitable shape.
In order to alleviate atomizating phenomenon caused by refringence, to keep brightness enhancement film that there is preferable optical brightness, this Shen In a kind of embodiment please, the refractive index of above-mentioned protrusion is n1, the refractive index of above-mentioned micro-structure is n2, | n1-n2|≤0.1。
In another embodiment of the application, above-mentioned non-elastic material is selected from bis-phenol (methyl) acrylate, bisphenol fluorene One of (methyl) acrylate, urethane acrylate and polyester acrylate are a variety of.I.e. in the material of the protrusion not Including ethoxy group, which can be using conventional blast membrane material.
But the non-elastic material of the application is not limited to above-mentioned material, those skilled in the art can be according to reality Situation selects suitable material as non-elastic material.
In order to further ensure micro-structure has preferable optical characteristics and appropriate elasticity, a kind of embodiment of the application In, above-mentioned elastic material includes the acrylate selected from the group containing ethoxy, such as: it can be adjacent phenyl benzene ethoxyethyl group propylene Acid esters, 2- hydroxyl -3- phenyl benzene ethoxycarbonyl propyl acrylate, ethoxylated bisphenol A diacrylate, ethoxyquin (4) bisphenol-A two Acrylate, ethoxyquin (10) one or more of bisphenol a diacrylate and ethoxy diphenyl base fluorenes diacrylate.This Field technical staff can select suitable material to form micro-structure according to the actual situation.
In the another embodiment of the application, as shown in figure 3, above-mentioned brightness enhancement film further includes substrate layer 1, substrate layer 1 is arranged On not set above-mentioned raised 3 surface of prism layer 2.
The material of above-mentioned substrate layer can be any material that can be used as brightness enhancement film substrate in the prior art, ability Field technique personnel can select material of the suitable material as substrate according to the actual situation.
In another embodiment of the application, the material of above-mentioned substrate layer is selected from one of PET, PE and PEN or a variety of.
In the typical embodiment of the another kind of the application, a kind of backlight module is provided, which includes blast Film, the brightness enhancement film are above-mentioned any brightness enhancement film.
The backlight module is due to including above-mentioned brightness enhancement film, so that it not only has preferable wear-resisting scratch-resistant characteristic, and Be not in be stained with glutinous phenomenon between brightness enhancement film and material layer thereon, in a display device by its application so that display image compared with Uniformly and without too big dirty sense.
In the typical embodiment of another of the application, a kind of display device is provided, which includes backlight Mould group, the backlight module are above-mentioned backlight module.
The display device is stronger, and reliability is higher, and shows that image is more uniform and does not have too big dirty sense.
In order to enable those skilled in the art more understand the technical solution of the application, below with reference to specific embodiment To illustrate the technical solution of the application.
Embodiment
The specific structure of brightness enhancement film is shown in Fig. 3, wherein substrate layer is pet layer, and the material of micro-structure is that Zhangjiagang health obtains brand-new The model KSSQ563 made, shore hardness is between 19~40D, which is elastic material, and including ethoxy group, Refractive index n2=1.56.The material of protrusion is that Zhangjiagang health obtains the model KSHG561 of coming of new, shore hardness 80~ It is non-elastic material between 95D, and does not include ethoxy group, refractive index n1=1.56, n1-n2=0.
Comparative example 1
The difference from embodiment 1 is that being not provided with protrusion in each micro-structure.
Comparative example 2
The difference from embodiment 1 is that raised material is identical as the material of micro-structure, it is to obtain brand-new for Zhangjiagang health The model KSSQ563 made.
In a display device by the brightness enhancement film application in above-described embodiment and comparative example, also, these display devices in addition to Except brightness enhancement film is different, other structures are all the same with material.The display picture of each display device is observed using observation method of naked eye, See that it shows whether picture is uneven or has dirty sense.Specific test result is shown in Table 1.
Table 1
By the result in above-mentioned table 1 it is found that the image quality of the display device formed using the brightness enhancement film of the application is preferable, Picture is more uniform, and the picture of the display device in comparative example is uneven.
It can be seen from the above description that the application the above embodiments realize following technical effect:
1, in the brightness enhancement film of the application, stiff protrusion is set at least one micro-structure of prism layer, by the increasing When bright film is applied in a display device, since the hardness of raised material is larger, in the effect by power, it is not easy to shape occur Become, and then be stained with glutinous problem caused by can directly contacting to avoid micro-structure with the other materials layer in protrusion, so that answering More uniform with the display picture of the display device of the brightness enhancement film and no biggish dirty sense.
2, the backlight module of the application is due to including above-mentioned brightness enhancement film, so that it not only has preferable wear-resisting scratch-resistant Characteristic, and be not in be stained with glutinous phenomenon between brightness enhancement film and material layer thereon, in a display device by its application, so that display Image is more uniform and without too big dirty sense.
3, the display device of the application is stronger, and reliability is higher, and shows that image is more uniform and without too big dirty Sense.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.

Claims (10)

1. a kind of brightness enhancement film, which is characterized in that the brightness enhancement film includes:
Prism layer (2), the micro-structure (20) including multiple prism-likes being arranged successively, the material of the micro-structure (20) are elasticity Material, the top of at least one micro-structure (20) are provided with raised (3), and the material of each raised (3) is non-resilient material Material.
2. brightness enhancement film according to claim 1, which is characterized in that the elastic material includes ethoxy group.
3. brightness enhancement film according to claim 1, which is characterized in that the top of each micro-structure (20) is provided with one Raised (3).
4. brightness enhancement film according to claim 1, which is characterized in that separate the micro-structure (20) of the protrusion (3) Surface includes cambered surface and/or plane.
5. brightness enhancement film according to claim 1, which is characterized in that the refractive index of the protrusion (3) is n1, the micro-structure (20) refractive index is n2, | n1-n2|<0.01。
6. brightness enhancement film according to claim 1, which is characterized in that the non-elastic material is selected from bis-phenol (methyl) acrylic acid One of ester acrylate, bisphenol fluorene (methyl) acrylate, urethane acrylate and polyester acrylate are a variety of.
7. brightness enhancement film according to claim 1, which is characterized in that the brightness enhancement film further include:
Substrate layer (1) is arranged on the surface of not set raised (3) of prism layer (2).
8. brightness enhancement film according to claim 7, which is characterized in that the material of the substrate layer (1) is selected from PET, PE and PEN One of or it is a variety of.
9. a kind of backlight module, including brightness enhancement film, the brightness enhancement film is brightness enhancement film described in any one of claim 1 to 8.
10. a kind of display device, including backlight module, which is characterized in that the backlight module is backlight as claimed in claim 9 Mould group.
CN201710201304.8A 2017-03-30 2017-03-30 Brightness enhancement film, backlight module and display device Active CN106908875B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112630875B (en) * 2020-12-28 2022-06-24 江苏双星彩塑新材料股份有限公司 High haze POP composite membrane

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5932626A (en) * 1997-05-09 1999-08-03 Minnesota Mining And Manufacturing Company Optical product prepared from high index of refraction brominated monomers
CN101285961A (en) * 2007-04-13 2008-10-15 株式会社常宝 Multifunctional optical multilayer film using optical diffuser
CN102027393A (en) * 2008-05-16 2011-04-20 可隆工业株式会社 Optical sheet
CN102067011A (en) * 2008-06-18 2011-05-18 3M创新有限公司 Films enabling autostereoscopy
CN104698517A (en) * 2013-12-09 2015-06-10 纬创资通股份有限公司 Optical film, optical film assembly and manufacturing method of optical film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5932626A (en) * 1997-05-09 1999-08-03 Minnesota Mining And Manufacturing Company Optical product prepared from high index of refraction brominated monomers
CN101285961A (en) * 2007-04-13 2008-10-15 株式会社常宝 Multifunctional optical multilayer film using optical diffuser
CN102027393A (en) * 2008-05-16 2011-04-20 可隆工业株式会社 Optical sheet
CN102067011A (en) * 2008-06-18 2011-05-18 3M创新有限公司 Films enabling autostereoscopy
CN104698517A (en) * 2013-12-09 2015-06-10 纬创资通股份有限公司 Optical film, optical film assembly and manufacturing method of optical film

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