CN101833126A - Optical film and manufacturing method thereof - Google Patents
Optical film and manufacturing method thereof Download PDFInfo
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- CN101833126A CN101833126A CN200910008774A CN200910008774A CN101833126A CN 101833126 A CN101833126 A CN 101833126A CN 200910008774 A CN200910008774 A CN 200910008774A CN 200910008774 A CN200910008774 A CN 200910008774A CN 101833126 A CN101833126 A CN 101833126A
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Abstract
The invention relates to an optical film and a manufacturing method thereof, which comprises a light-permeable base material, a plurality of diffusion micro-particles distributed on the base material and a light collection layer arranged on the surface of the base material. Part of the diffusion micro-particles lead at least one surface of the base material to form bulges, and the protrusive height of part of the bulges is larger than or equal to 0.5 mu m. The manufacturing method of the optical film mainly comprises the following steps: heating the base material for leading the base material to be in molten state, adding the diffusion micro-particles on the surface of the base material, curing the base material for forming the base material, and finally forming the light collection layer on the surface of the base material. The optical film only contains the double-layer structure of the base material and the light collection layer, and can still achieve the effects of light collection and light diffusion atomization while reducing the number of film layers, so that the manufacturing method has the advantages of easy manufacture and reduced cost.
Description
Technical field
The present invention relates to a kind of blooming and manufacture method thereof, particularly a kind of being applied in the display, and have the blooming and the manufacture method thereof of light harvesting and light diffusion atomizing concurrently.
Background technology
Brightness enhancement film and diffusion barrier all are the critical elements in the LCD (LCD), and described brightness enhancement film is used to make light to penetrate more concentratedly, and concentrate in the scope of user perspective, so as to promoting the brightness of LCD.On the other hand, owing to have multi-layer optical membrane to pile up in the module, each diaphragm optical interference to each other is easy to generate Newton ring (Newton-ring), perhaps diaphragm itself has optics flaws such as rainbow lines, therefore must be by the light diffusion atomizing effect of diffusion barrier, avoid above-mentioned optics flaw on indicator screen, to be observed, so that good lcd screen image quality and visual sense to be provided.
And, many diffusion function and development researches of being integrated into a blooming of the light harvesting function of brightness enhancement film with diffusion barrier are arranged at present in order to reach lightening, the purpose such as reduce cost of LCD.Described blooming is in two opposed surface of a base material, form a diffusion layer and a light-collecting layer respectively, this diffusion layer is towards the light source of LCD, this light-collecting layer is towards the liquid crystal board of LCD, utilize the coarse structure on diffusion layer surface, perhaps in diffusion layer, add the effect that diffusion particulate, bubble with light diffusion reach light diffusion atomizing; In addition, also have diffusion layer is located in design between this base material and the light-collecting layer, in this diffusion layer, add diffusion particulate or bubble again.The aforementioned patent of utilizing rough surface or non-flat configuration to reach atomizing effect; for example: U.S. Pat 5600462; US5841572; US5598280; US6322236; US6880946; patent cases such as US6356389; and the patent of utilization diffusion particulate or doping bubble; for example: U.S. Pat 2006-0114567; US2006-0290253; US2007-0126074; US2007-0128413; US2007-0164274; US7006293; US20070236938; US5995288; U6280063, Taiwan patent TWI264578; TWM296993; patent cases such as TWM293442.
The patent of above-mentioned doping diffusion particulate or bubble, its diffusion particulate all must make an addition in this diffusion layer, therefore; the blooming of this type all includes three-deckers such as base material, light-collecting layer and diffusion layer simultaneously; in fact, the rete quantity of blooming does not drop to minimum yet, and cost is still high.And the method for making of this type of blooming, must be used to form the diffusion layer material of this diffusion layer prior to the surface coated one of base material, be added with the diffusion particulate in this material, treat that diffusion layer material solidifies the back and forms this diffusion layer, afterwards again in another surface coated light-collecting layer material and the described sheet feeding type of moulding of this base material, then also to wait until this light-collecting layer material cured and form light-collecting layer.
Because each rete of moulding all must be through the rete program curing, cause processing procedure time of above-mentioned blooming long and efficient is slow, cause production capacity can't promote the disappearance still high with manufacturing cost.And this light-collecting layer and base material are unlike material, base material and diffusion layer also are that unlike material is made, combination between the rete of unlike material also must be considered linking steady character to each other, so the rete quantity of blooming will more be unfavorable for the more the time making, therefore its processing procedure is comparatively difficult, if any disappearance is arranged in the processing procedure, just may cause the firmly combination of each rete of this blooming.
Summary of the invention
The purpose of this invention is to provide a kind of blooming and a kind of manufacture method that can shorten manufacturing time, improve the blooming of making efficient, reduction manufacturing cost that can reduce rete quantity, reduce cost and be easy to make.
The invention provides a kind of blooming, comprise: the base material of a light-permeable, a plurality of diffusion particulates and that are distributed in this base material are arranged on the light-collecting layer on the surface of this base material.Several at least at least one surface of this base material that make in the described diffusion particulate form a plurality of projections, and the several at least projecting height in the described projection is more than or equal to 0.5 micron (μ m).
Blooming of the present invention, this base material comprises first and second of back span, contiguous this first of described diffusion particulate, and several at least first the aforementioned projection of formation that makes this base material in the described diffusion particulate, this light-collecting layer is arranged on second of this base material.
Blooming of the present invention, this base material comprises first and second of back span, this light-collecting layer is arranged on second of this base material, contiguous this second of described diffusion particulate, and several at least this base material and this light-collecting layers of being arranged in simultaneously in the described diffusion particulate.
Blooming of the present invention, the refractive index of described diffusion particulate are n1, and the refractive index of this base material is n2, and | n2-n1|＞0.01.
Blooming of the present invention, n2-n1＞0.01.
Blooming of the present invention, this light-collecting layer have a plurality of adjacent sheet feeding types, and described sheet feeding type is prismatic mirror structure or prismatic mirror structure.
Need to prove, though the quantity of diffusion particulate is a plurality of, but be not that whole diffusion particulates all will make first of this base material to form projection, just can reach effect of the present invention, as long as the wherein several projections that cause in whole diffusion particulates are just passable, and " several at least " are meant the qualification of minimum level, in other words, in all diffusion particulates, a plurality of first projection that can cause base material to be arranged at least wherein.
Same, the projection that the diffusion particulate causes has a plurality of, but is not the qualification that all projections all must meet this projecting height, if in the middle of whole projections wherein several meet this and highly limit.And define the qualification that " several at least " are meant minimum level.
The manufacture method of blooming of the present invention comprises: steps A: a substrate material that is molten state is provided; Step B: add the diffusion particulate on the surface of this substrate material; Step C: make this substrate material that is added with the diffusion particulate be solidified to form this base material, the diffusion particulate can be distributed in this base material, and the several at least surfaces of this base material that make in the described diffusion particulate form projection; And step D: form this light-collecting layer in the surface of this base material.
The manufacture method of blooming of the present invention, described substrate material is selected from: polyethylene terephthalate, polycarbonate, polymethylmethacrylate, tygon, polypropylene, polyvinyl alcohol (PVA), Polyvinylchloride, polyurethane, or above-mentioned arbitrary combination.
The manufacture method of blooming of the present invention, the light-collecting layer of step D are formed on the surface of the described diffusion particulate of vicinity of this base material.
The manufacture method of blooming of the present invention, the light-collecting layer of step D are formed on the surface away from described diffusion particulate of this base material.
Beneficial effect of the present invention is: this blooming only comprises the double-decker of base material and light-collecting layer, and make the surface of this base material form projection by described diffusion particulate, increase surfaceness to promote the light diffusion effect, therefore the present invention is when reducing rete quantity, can reach light harvesting and light diffusion atomizing effect equally, and then have the advantage that reduces cost.And only need make two-layer rete and can shorten time, raising processing procedure efficient, the reduction manufacturing cost that rete solidifies.
Description of drawings
Fig. 1 is the cut-open view of one first most preferred embodiment of blooming of the present invention;
Fig. 2 is a cut-open view, shows the another kind of structure kenel of blooming of the present invention;
Fig. 3 is the process flow diagram of one first most preferred embodiment of the manufacture method of blooming of the present invention;
Fig. 4 is the cut-open view of one second most preferred embodiment of blooming of the present invention.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples, is noted that in the following description content, similar elements is represented with identical numbering.
Consult Fig. 1, first most preferred embodiment of blooming of the present invention comprises: a base material 1, a plurality of diffusion particulates 2 and that are distributed in this base material 1 are arranged on the light-collecting layer 3 on the surface of this base material 1.
This base material 1 comprises one first 11 and 1 second 12 of back span, this first 11 towards the unshowned light source of a figure, the light of this light emitted is in regular turn by this base material 1 and this light-collecting layer 3, but embodiment is not restriction with the relative position of this light source and blooming of the present invention.Though second 12 of the base material 1 of present embodiment is straight extension, also can be the curve of bending extension when implementing.The thickness of this base material 1 is about 20 to 1000 microns (μ m), selected base material 1 material of the present invention is except needs have light transmission, there is no other particular restriction, the for example following resin of its material: polyethylene terephthalate (polyethylene terephthalate, PET), polycarbonate (polycarbonate, PC), polymethylmethacrylate (polymethylmethacrylate, PMMA), tygon (polyethylene, PE), polypropylene (polypropylene, PP), polyvinyl alcohol (PVA) (polyvinyl alcohol, PVA), Polyvinylchloride (polyvinyl chloride, PVC), polyurethane (polyurethane, PU), or arbitrary combination of above-mentioned material, but be not limited to above-mentioned material.The base material 1 of present embodiment uses PET to make.
The diffusion particulate 2 of present embodiment is distributed in this base material 1 and is close to this first 11, and the part in the described diffusion particulate 2 is several to be imbedded in this base material 1 fully, and other diffusion particulate 2 parts are imbedded in the base material 1 and local outstanding first 11 of exposing to this base material 1.Described diffusion particulate 2 can adopt for example PMMA, PC, PE, polystyrene (Polystyrene, PS), the organic filler made of the co-polymer materials such as (MS resins just) formed for primary raw material of methyl methacrylate (MMA) and styrene (SM), or titania (TiO
2), silicon dioxide (SiO
2), aluminium oxide (Al
2O
3), boron oxide (B
2O
3), the inorganic particulate made of calcium oxide (CaO), magnesium oxide materials such as (MgO).Diffusion particulate 2 can be that solid particle also can be a hollow granule, and its shape can must not limited for spherical or irregular, and the particle diameter of each diffusion particulate 2 can be identical also can be for inequality.
The diffusion particulate 2 of present embodiment is made by PMMA, and particle diameter is about 1 to 7 μ m.And protrude in these a plurality of diffusion particulates 2 of first 11, the projecting height d1 of each projection of causing of diffusion particulate 2 differs and establishes a capital identical and vary, but the several at least projecting height d1 in the described projection is greater than or equals 0.5 μ m, just Bu Fen d1 〉=0.5 μ m.Described projecting height d1 is meant diffusion particulate 2 formed outstanding minimum points and this distance of first 11.Just can make light be subjected to enough atomizings whereby and eliminate optical interference effect between two interfaces, to reach atomizing and to eliminate the effect of the interface interference of light.
And the present invention is when being arranged on the display module, can be stacked in the top of other blooming piece, the diaphragm of first 11 below of can directly not fitting of this base material 1, but utilize outstanding diffusion particulate 2 to contact the surface of below diaphragms, its advantage is: if when this surface of first 11 is smooth, easy and below diaphragm produces interference of light effect, just be easy to generate Newton ring this moment, and the projection that present embodiment diffusion particulate 2 is caused, make this first 11 with the below diaphragm keep certain distance, and increase the air dielectric that is present between this base material 11 and below diaphragm whereby, just can slow down the Newton ring interference phenomenon between this blooming and below diaphragm.Described diffusion particulate 2 can be the individual layer setting during enforcement, also can be multilayer and height arrangement, as long as there is the diffusion particulate 2 of part can cause this projection of first 11 just passable.
The refractive index of described diffusion particulate 2 is n1, and the refractive index of aforementioned substrates 1 is n2, when the difference of n1 and n2 greater than 0.01 the time, just | n2-n1|＞0.01 just can reach light refraction and atomizing effect by the material of described different refractivity.And the material that present embodiment is selected for use makes n2-n1＞0.01, wherein, n1=1.49, n2=1.6, refractive index n 1 by diffusion particulate 2 is less than the refractive index n 2 of base material 1, when making light enter described diffusion particulate 2, can reduce the reflex that light is subjected to the interface, enter ratio in the diffusion particulate 2 to promote light by 1 refraction of this base material, light is reflected away after spreading particulate 2 really again, and then reach preferable light diffusion atomizing effect.
This light-collecting layer 3 is arranged on second 12 of this base material 1, and have a plurality of adjacent and be the sheet feeding type 31 of the prismatic mirror of prismatic mirror or class, described sheet feeding type 31 also can have the shape of light harvesting effect for other during enforcement, for example is that the surface is to upper process or to prismatic mirror structure, the class prismatic mirror structure of lower recess.The material of this light-collecting layer 3 is without any particular restriction, for example: acrylate, amine ethyl formate acrylate (urethaneacrylate), polyester acrylate materials such as (polyester acrylate) can.The light-collecting layer 3 of present embodiment is to adopt the acryl based material, and thickness is about about 6 to 30 μ m.
Consult Fig. 2, need to prove, diffusion particulate 2 causes a plurality of projections on base material 1 surface, and described projection can be that diffusion particulate 2 itself directly protrudes in base material 1 surface, or diffusion particulate 2 is imbedded in the base material 1 but caused base material 1 surface formation projection because of graininess.
Consult Fig. 1,3, first most preferred embodiment of the manufacture method of blooming of the present invention comprises:
(1) carry out step 41: get a substrate material that is used for this base material 1 of moulding, substrate material is poured in the module of a make-up machine, and heat this substrate material and make it be molten state.The concrete example of described make-up machine is the extrusion molding machine.
(2) carry out step 42: be at this substrate material under the state of fusion, add diffusion particulate 2 in the surface of this substrate material, make the surface of described diffusion particulate 2 contiguous these substrate materials, and wherein several diffusion particulates 2 can imbed in this substrate material fully, and other diffusion particulate 2 can cause the substrate material surface to produce overshooting shape.Described overshooting shape can be that diffusion particulate 2 directly protrudes in the surface of substrate material, or imbeds in the substrate material but cause formation projection in substrate material surface because of graininess.
(3) carry out step 43: make this substrate material that is added with diffusion particulate 2 via extrusion molding and cooling curing, just form this base material 1.
(4) carry out step 44: in another surface of this base material 1, the light-collecting layer material that coating one is used for this light-collecting layer 3 of moulding on second 12 just, after the described sheet feeding type 31 of roller rolling moulding, the light-collecting layer material cured just forms this light-collecting layer 3 by the time.
Consult Fig. 1 and table 1, sample 1,2 all is the structure of the present invention's first most preferred embodiment, the thickness of the base material 1 of sample 1,2 all is 125 μ m, penetrability 91%, mist degree 2.1%, about 2 to the 4 μ m of projecting height that diffusion particulate 2 causes, sample 1,2 different places are the size of structure live width d2 (Fig. 1), and described structure live width d2 is meant the spacing of adjacent sheet feeding type 31.Comparative example 1 is meant general conventional optical film, only comprises a base material and a light-collecting layer, and do not mix any diffusion particulate or coating diffusion layer.Comparative example 2 is produced for 3M company, and model is the prism film of BEF II-M.
Wherein, the luminance gain value is produced with TOPCON company, and model is that the beam split brightness photometer of SR-3A carries out the briliancy measurement.The Newton ring phenomenon is directly to carry out surface observation can get.
By the test result of table 1 as can be known, the Newton ring phenomenon of sample 1 of the present invention is extremely slight, and sample 2 is not observed Newton ring, and sample 1,2 is with under comparative example 1 conventional optical film is compared, and the present invention obviously improves the optics flaw of Newton ring really.Though and the 3M company prism film of comparative example 2 can improve Newton ring, but its structure comprises three-deckers such as base material, light-collecting layer and diffusion layer, the present invention is with under comparative example 2 is compared, and has the rete of minimizing quantity reducing cost, and possesses the advantage of higher briliancy performance.
Table 1
| Sample | Structure live width (um) | Luminance gain value (%) | Newton ring | Judge |
| Sample 1 | 50 | ??50.6 | Extremely slight | ?? |
| Sample | ||||
| 2 | 24 | ??48.3 | Do not have | ??OK |
| Comparative example 1 | 50 | ??52.1 | Obviously | ??NG |
| Comparative example 2 | 24 | ??46.5 | Do not have | ??OK |
By above explanation as can be known, blooming of the present invention only comprises the double-decker of base material 1 and light-collecting layer 3, compared with the past under, when reducing rete quantity, can reach light harvesting and light equally and spread atomizing effect, and then have the advantage that reduces cost.And the diffusion particulate 2 of part makes this surface of first 11 form projection, increases by first 11 surfaceness whereby, to promote the light diffusion effect.In addition, when making this blooming, can shorten the time that rete solidifies owing to only need to make two-layer rete, promote the production efficiency of blooming simultaneously, and only consider the set combination of two membranes interlayer, its linking steady character is easy to reach, so manufacture method of the present invention can reach effects such as shortening processing procedure time, raising processing procedure efficient, reduction manufacturing cost really.
Consult Fig. 4, second most preferred embodiment of blooming of the present invention, roughly the same with this first most preferred embodiment, different places are: the diffusion particulate 2 of present embodiment is contiguous this second 12 and be provided with, wherein several the projecting upwards in this second 12 of described diffusion particulate 2 is arranged in base material 1 and light-collecting layer 3 simultaneously, and outstanding diffusion particulate 2 makes second 12 and forms projection.Certainly, though the projection of present embodiment all is by diffusion particulate 2 directly outstanding this second 12 and form, in fact, described projection also can be that diffusion particulate 2 is imbedded fully in the base material 1 but caused second 12 protrusion of surface because of graininess.And the projecting height d1 of the part projection that caused of diffusion particulate 2 is greater than equally or equals 0.5 μ m.
Because as long as diffusion particulate 2 can make any one surface of this base material 1 present the rough surface of recessed prominent injustice, just can promote the light diffusion effect of this base material 1, therefore spreading particulate 2 can also can be provided with as this this first 11 of first most preferred embodiment vicinity as contiguous this second 12 of present embodiment.
The manufacture method of present embodiment and this first most preferred embodiment are roughly the same, and different places are: when adding described diffusion particulate 2 and coating light-collecting layer material, all be the same surface at this base material 1, just carry out on second 12.
Claims (10)
1. blooming, comprise: the base material of a light-permeable and one deck are arranged on the light-collecting layer on the surface of this base material, it is characterized in that,
This blooming also comprises a plurality of diffusion particulates that are distributed in this base material, and several at least at least one surface of this base material that make in the described diffusion particulate form a plurality of projections, and the several at least projecting height in the described projection is more than or equal to 0.5 micron.
2. blooming according to claim 1, it is characterized in that, this base material comprises first and second of back span, contiguous this first of described diffusion particulate, and several at least first the aforementioned projection of formation that makes this base material in the described diffusion particulate, this light-collecting layer is arranged on second of this base material.
3. blooming according to claim 1, it is characterized in that, this base material comprises first and second of back span, this light-collecting layer is arranged on second of this base material, contiguous this second of described diffusion particulate, and several at least this base material and this light-collecting layers of being arranged in simultaneously in the described diffusion particulate.
4. blooming according to claim 1 is characterized in that, the refractive index of described diffusion particulate is n1, and the refractive index of this base material is n2, and | n2-n1|＞0.01.
5. blooming according to claim 4 is characterized in that, n2-n1＞0.01.
6. according to each described blooming in the claim 1 to 5, it is characterized in that this light-collecting layer has a plurality of adjacent sheet feeding types, described sheet feeding type is prismatic mirror structure or prismatic mirror structure.
7. the manufacture method of a blooming, comprise: steps A: a substrate material that is molten state is provided, it is characterized in that, the manufacture method of this blooming also comprises:
Step B: add a plurality of diffusion particulates on the surface of this substrate material;
Step C: make this substrate material that is added with the diffusion particulate be solidified to form a base material, described diffusion Particle Distribution is in this base material, and the several at least surfaces of this base material that make in the described diffusion particulate form projection; And
Step D: the surface in this base material forms one deck light-collecting layer.
8. the manufacture method of blooming according to claim 7, it is characterized in that, described substrate material is selected from: polyethylene terephthalate, polycarbonate, polymethylmethacrylate, tygon, polypropylene, polyvinyl alcohol (PVA), Polyvinylchloride, polyurethane, or above-mentioned arbitrary combination.
9. the manufacture method of blooming according to claim 7 is characterized in that, the light-collecting layer of step D is formed on the surface of the described diffusion particulate of vicinity of this base material.
10. the manufacture method of blooming according to claim 7 is characterized in that, the light-collecting layer of step D is formed on the surface away from described diffusion particulate of this base material.
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| CN2009100087748A CN101833126B (en) | 2009-03-09 | 2009-03-09 | Optical film and manufacturing method thereof |
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| CN102540288A (en) * | 2011-12-28 | 2012-07-04 | 广州市白云信达反光材料有限公司 | High-light-transmittance diffusion type thin film and preparation method thereof |
| CN102565914A (en) * | 2010-12-09 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Light guide body and manufacturing method thereof |
| CN104749667A (en) * | 2013-12-26 | 2015-07-01 | 昆山国显光电有限公司 | Antireflective substrate and preparation method and application thereof |
| CN106154368A (en) * | 2015-03-23 | 2016-11-23 | 宁波激智科技股份有限公司 | A kind of multi-functional complex optical film |
| CN106597584A (en) * | 2016-12-15 | 2017-04-26 | 张家港康得新光电材料有限公司 | Anti-absorption diffusion barrier |
| CN108627896A (en) * | 2017-12-27 | 2018-10-09 | 深圳市长松科技有限公司 | A kind of optical diffusion film |
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| CN2791693Y (en) * | 2005-04-29 | 2006-06-28 | 群康科技(深圳)有限公司 | Light-collecting sheet and backlinght module adopting same |
| CN101373228A (en) * | 2007-08-23 | 2009-02-25 | 开曼群岛商亚岗科技股份有限公司 | Optical film directly with base layer as light diffusion layer and its preparing method |
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| CN102565914A (en) * | 2010-12-09 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Light guide body and manufacturing method thereof |
| CN102565914B (en) * | 2010-12-09 | 2016-03-09 | 鸿富锦精密工业（深圳）有限公司 | Light conductor and manufacture method thereof |
| CN102540288A (en) * | 2011-12-28 | 2012-07-04 | 广州市白云信达反光材料有限公司 | High-light-transmittance diffusion type thin film and preparation method thereof |
| CN104749667A (en) * | 2013-12-26 | 2015-07-01 | 昆山国显光电有限公司 | Antireflective substrate and preparation method and application thereof |
| CN106154368A (en) * | 2015-03-23 | 2016-11-23 | 宁波激智科技股份有限公司 | A kind of multi-functional complex optical film |
| CN106597584A (en) * | 2016-12-15 | 2017-04-26 | 张家港康得新光电材料有限公司 | Anti-absorption diffusion barrier |
| CN108627896A (en) * | 2017-12-27 | 2018-10-09 | 深圳市长松科技有限公司 | A kind of optical diffusion film |
| CN113504592A (en) * | 2021-07-08 | 2021-10-15 | 江西盛汇光学科技协同创新有限公司 | Diffusion film for printing display and preparation method thereof |
| CN113504592B (en) * | 2021-07-08 | 2023-04-18 | 江西盛汇光学科技协同创新有限公司 | Diffusion film for printing display and preparation method thereof |
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| CN101833126B (en) | 2012-06-13 |
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