CN101377552B - Optical film - Google Patents
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- CN101377552B CN101377552B CN2008101493621A CN200810149362A CN101377552B CN 101377552 B CN101377552 B CN 101377552B CN 2008101493621 A CN2008101493621 A CN 2008101493621A CN 200810149362 A CN200810149362 A CN 200810149362A CN 101377552 B CN101377552 B CN 101377552B
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Abstract
The invention discloses an optical film which comprises a substrate with a microstructure and a resin coating which is positioned on the microstructure of the substrate; wherein, the resin coating comprises a plurality of organic particles and binding agents; the microstructure comprises a plurality of column-shaped structures which are in equilateral column-shaped structures; the organic particles are mutually tangent to the column-shaped structures; and the height of the organic particles is not higher than the height difference between the top of the column-shaped structures and the bottom of the column-shaped structures of the parent metal. The optical film of the invention enables the organic particles to be evenly and orderly distributed on the surface of the substrate so as to homogenize the light and improve the optical luminance.
Description
Technical field
The invention relates to a kind of blooming, refer to a kind of backlight module that is used for especially, have high all bloomings of the optical characteristics of homogeneous with surface micro-structure.
Background technology
Because liquid crystal panel originally as non-luminous display assembly, therefore must use backlight module, so that the light source that brightness is sufficient and be evenly distributed to be provided, makes normally show image of display equipment.Prior art is used for the backlight module of LCD (LCD), mainly utilizes diffuser plate, diffusion barrier and condensing film to reach the purpose of even light and light harvesting.Diffuser plate, diffusion barrier major function are for providing the LCD uniform surface light source.The condensing film industry is practised and is called brightness enhancement film (brightnessenhancement film) or prismatic lens (prism film), the condensing film major function is for passing through refraction and inner full-reflection with ray-collecting at random, and be concentrated to positive visual angle (on-axis) direction of degree approximately ± 35, to improve the briliancy of LCD.
Prior art condensing film as shown in Figure 1 is (as No. the 96/23649th, open case of PCT and United States Patent (USP) the 5th, 626, No. 800), a plurality of prism structures 2 that it comprises a base material 1 and is positioned at base material 1 top, described prism structure is parallel each other, wherein each prism structure system is made of two inclined surfaces, and this two inclined surface forms peak 3 in the prism roof intersection, and intersects formation paddy 4 with another inclined surface of adjacent prisms in the prism bottom separately.
When the prism structure of known condensing film contacts with panel or other diaphragm, easily produce scratch, influence its optical property.The method of industry solution at present is mainly utilizes protectiveness diffusion barrier (or being called diffusion barrier) to prevent that condensing film and panel or other diaphragm from producing vibration and causing mutual damage when carrying.Cause the scratch except that utilizing the protectiveness diffusion barrier to prevent that condensing film from contacting with panel, before assembling, also need attach the damage of diaphragm to avoid condensing film during storing and/or transporting, may cause.Use protectiveness diffusion barrier and diaphragm, improve required cost all relatively.
The prior art diffusion barrier mainly is on transparent base, coating resin cement and form diffusion layer as the chemical particle of granule proliferation.When this diffusion layer of light process, because of producing refraction, reflection and scattering, can effectively spread light, and then reach the effect of equalizing light rays by two different media of refractive index.And the granule proliferation that uses in the skill is generally particle diameter and differs, strengthening the light diffusion effect of diffusion barrier, yet, though it can make the light diffusion effect give full play to, but owing to can make scattering of light very at random, therefore can waste the part light source simultaneously, can't effectively utilize light source.In addition, in the middle of the blooming process, granule proliferation is easily assembled mutually or is sticked each other and influences the uniformity coefficient of diffusion light or make and produce dim spot on the display surface.
In addition, in various blooming pieces, optically focused diaphragm price is higher relatively, therefore in the backlight modular structure of new development, in order to reduce cost, tendency develops the blooming piece of new kenel or upward does to change with replacement optically focused diaphragm with other blooming piece and combination thereof.As form transparent microlens structure (microlens) at substrate surface, utilize this structure and properties of materials, optical film material has the effect of diffusion and optically focused simultaneously, (United States Patent (USP) the 7th as shown in Figure 2,265, No. 907), blooming has a transparent base 4, and base material on by formed microlens structure 20a of different lines and 20b, each microlens structure then comprises a plurality of single microlens structure 2a and 2b.But the manufacture method processing procedure speed of this structure is all too slow at present, therefore significantly reduces its industry applications.For example United States Patent (USP) the 7th, 265, No. 907 No. the 287644th, Republic of China's patent (or) discloses and forms transparent microlens structure with drop (droplet) method at substrate surface, though declare to use volume to volume formula (roll to roll) technology production, but when drop forms microlens structure on substrate, must allow substrate stop scrolling a period of time earlier, formation microlens structure that could be complete, the continuous volume to volume formula technology that (slot die coating) or the roller methods such as (roller coating) that is coated with that can't be coated with as slit can need not stop to be made fast.
Summary of the invention
In sum, the invention provides a kind of blooming to improve above-mentioned shortcoming, it can utilize structural configuration, make organic granular be subjected to arround the barrier effect of structure, thereby limit its degree of freedom, and then reduce the arrangement that preface is assembled or sticked and have to organic granular each other, can take into account optically focused and diffusion effect, reach homogenize light, promote the effect of optics briliancy.
The present invention provides a kind of blooming piece with surface micro-structure that can realize with the continuous production technology manufacturing of volume to volume formula on the other hand, can significantly promote the industry applications of this blooming piece.
The technical scheme taked of the present invention is to achieve these goals: a kind of blooming comprises: the base material with microstructure; And be positioned at resinous coat on the microstructure of described base material, it comprises a plurality of organic granulars and cement, wherein said microstructure comprises a plurality of column structures, described column structure is equilateral column structure, described organic granular and column structure are tangent to each other, and Hb ≧ H, wherein Hb is the vertical range of relative this column structure bottom, summit of described organic granular, H is the vertical range of relative this column structure bottom, the peak of column structure.
Described microstructure comprises the plurality of parallel column structure.
Described parallel column structure has equal height, width and drift angle angle.
Described column structure is to be prism column structure, arc column structure or its mixing.
Described column structure is to be the prism column structure, and described prism column structure is to join and satisfied following formula:
Wherein H is meant the vertical range of relative this column structure bottom, peak of column structure, and 2 θ are meant the drift angle angle of column structure, and R is meant the radius of organic granular.
Described column structure is to be linear column structure, curve column structure, broken line column structure or its mixing.
Described organic granular has single mean grain size, and the size distribution of described organic granular is to fall within this mean grain size in ± 30% scope; And described organic granular is the organic granulars of per 100 weight portion cement solids between 100 to 300 weight portions with respect to the amount of cement solid.
The mean grain size of described organic granular is in 1 to 100 micrometer range.
The size distribution of described organic granular is to fall within the mean grain size of described organic granular in ± 15% scope.
Described base material with microstructure is integrally formed.
Described base material with microstructure is by forming at a plurality of column structures of base material one surface coated.
Described organic granular is the group that is made up of acrylate resin, methacrylate resin, styrene resin, amido formate resin, silicone resin and composition thereof for being selected from.
Described base material has an adherence in another surface with respect to this resin-coated surface and prevents layer.
The described a kind of blooming of the other embodiment of the present invention comprises: the base material with microstructure; And be positioned at resinous coat on the microstructure of described base material, it comprises a plurality of organic granulars and cement, these described organic granulars are polyacrylate resins, its acrylic ester monomer that comprises the acrylic ester monomer of at least a monofunctional and at least a multiple functional radical is as polymerized unit, and wherein the acrylic ester monomer of all multiple functional radicals system accounts for total monomer weight between 30 to 70%; Described organic granular has single mean grain size, and the size distribution of described organic granular is to fall within this mean grain size in ± 30% scope; And described organic granular is the organic granulars of per 100 weight portion cement solids between 100 to 300 weight portions with respect to the amount of cement solid.
Described microstructure comprises plurality of parallel prism column structure, described column structure is to join and is equilateral column structure, described organic granular and column structure are tangent to each other, and Hb ≧ H, wherein Hb is the vertical range of relative this column structure bottom, summit of described organic granular, and H is the vertical range of relative this column structure bottom, the peak of column structure.
Described polyacrylate resin is made of the monomer that comprises methyl methacrylate and ethylene glycol dimethacrylate.
Described resinous coat has the thickness between 5 microns to 30 microns.
The mean grain size system of described organic granular is between 2 to 50 microns.
The organic granular that is comprised in the described resinous coat is the organic granulars of per 100 weight portion cement solids between 120 weight portion to 220 weight portions with respect to the amount of cement solid.
Described base material is to be group that free polyethylene terephthalate, polymethylmethacrylate, poly-cyclic olefin resins, Triafol T, PLA and composition thereof constitute.
Described cement is to be selected from by group that ultraviolet hardening resin, thermoset resin, thermoplastic resin and composition thereof constitute.
The invention has the beneficial effects as follows: compared to existing technology, blooming of the present invention utilizes structural configuration, make organic granular be subjected to arround the barrier effect of structure, thereby limit its degree of freedom, and then reduce the arrangement that preface is assembled or sticked and have to organic granular each other, can take into account optically focused and diffusion effect, reach homogenize light, promote the effect of optics briliancy.
Description of drawings
Fig. 1 is the synoptic diagram of prior art condensing film;
Fig. 2 is the synoptic diagram of prior art microlens structure diaphragm;
Fig. 3 is a synoptic diagram of blooming of the present invention;
Fig. 4 is another sectional view of blooming of the present invention;
Fig. 5 is the column structure of blooming of the present invention and the geometric representation of organic granular;
Fig. 6 is the geometric representation of the column structure bottom of blooming of the present invention to the organic granular centre of sphere;
Fig. 7 is another synoptic diagram of blooming of the present invention;
Fig. 8 is another synoptic diagram of blooming of the present invention;
Fig. 9 is another synoptic diagram of blooming of the present invention;
Figure 10 has the constructed profile of arc column structure microstructured layers for the present invention;
Figure 11 is a vertical view of blooming of the present invention;
Figure 12 is another vertical view of blooming of the present invention.
[primary clustering symbol description]
101: base material,
103: the column structure bottom,
107 and 301: microstructured layers,
109: column structure,
113,123 and 302: organic granular,
121: adherence prevents layer,
110 and 122: cement,
105: the peak of column structure.
Embodiment
Employed in this article term is not in order to restriction protection domain of the present invention only for describing described embodiment.Say it for example, employed term " " in the instructions, unless clear and definite explanation is arranged in the literary composition in addition, term " " is encompasses singular and most form.
In this article, column structure is meant prism column structure or arc column structure or its mixed structure.
In this article, " prism column structure " is made of two inclined surfaces, and above-mentioned inclined surface can be the plane, and described two inclined surfaces form a curved surface in column structure roof intersection formation peak or passivation.
In this article, " arc column structure " is made of two inclined surfaces, and above-mentioned inclined surface can be curved surface, and above-mentioned two inclined surfaces form a curved surface in column structure roof intersection formation peak or passivation.
In this article, " linear column structure " is crest line (ridge) (linear) column structure that extends linearly that is defined as column structure.
In this article, " curve column structure " is that the crest line that is defined as column structure is the column structure that bending change is extended, the described crooked crest line system of extending forms suitable surface curvature change, described crooked surface curvature change system of extending crest line is 0.2% to 100% of a benchmark with this curve (serpentine) column structure height, and being preferably with described curve column structure height is 1% to 20% of benchmark.
In this article, " broken line column structure " is that the crest line that is defined as column structure is the column structure that broken line (zigzag) changes extension.
In this article, H represents the height of column structure, is meant the vertical range of relative this column structure bottom, peak of described column structure.
In this article, H
bRepresent the height of organic granular, be meant the vertical range of the described relatively column structure bottom, summit of above-mentioned organic granular.
In this article, 2 θ represent the drift angle angle that two inclined surfaces of column structure intersect.
In this article, R represents the radius of organic granular, and Ra represents the mean radius of organic granular.
In this article, r represents the radius-of-curvature of arcuate furrow.
Blooming of the present invention comprises a base material with microstructure; One resinous coat, above-mentioned microstructure comprises a plurality of column structures, above-mentioned column structure can be used to limit the degree of freedom of described a plurality of organic granulars, reduce described organic granular and assemble or stick and have the arrangement of preface each other, can take into account optically focused and diffusion effect, and then reach homogenize light, promote the optics brightness value.
Base material with microstructure used in the present invention, can use the known any way preparation of persond having ordinary knowledge in the technical field of the present invention, for example: can prepare in integrally formed mode with base material, for example make with impression (emboss), the modes such as (injection) that penetrates; Or use commercially available condensing film lamination (laminate) on base material; Or with volume to volume formula (roll to roll) continuously production technology on base material, be coated with and have a plurality of patterned surfaces that spotlight effect is provided.Can be used for commercially available condensing film of the present invention comprises: produced by Sumitomo3M company, commodity are by name
Or BEF II90/
The person; Produced by Mitsubishi Rayon company, commodity are called DIA ART
Or P210 person etc.
According to a better embodiment of the present invention, the formation method with base material of microstructure is with the continuous production technology of volume to volume formula, is coated with a plurality of column structures in base material one side.
Above-mentioned column structure can be linearity (linear), curve (serpentine) or broken line (zigzag) column structure, and two adjacent column structures can be parallel or not parallel, be preferably parallel, two adjacent column structures can join or not join each other, and formed groove comprises V-arrangement, arc or trapezoidal between adjacent two column structures.
Column structure used in the present invention is equilateral column structure, can be contour or not contour, wide or not wide, can be prism column structure or arc column structure or its mixing, and be preferably the prism column structure.The drift angle angle of prism column structure used in the present invention or arc column structure can be mutually the same or inequality, and it is between 40 ° to 120 °.
Be persond having ordinary knowledge in the technical field of the present invention institute well known in order to the resin that forms above-mentioned column structure, for example, thermmohardening (thermal setting) resin or energy ray curable resin, above-mentioned energy-ray is meant the light source of certain limit wavelength, and for example it can be ultraviolet light, infrared light, visible light or hot line (radiation or radiation) etc.Exposure intensity can be from 1 to 500 millijoule/square centimeter (mJ/cm
2), preferable system from 50 to 300mJ/cm
2Be preferably ultraviolet curable resin (UV curable resin), the example that is applicable to ultraviolet curable resin of the present invention comprises acrylic resin (acrylate resins), the kind of acrylic resin is preferably (methyl) acrylate resin such as but not limited to (methyl) acrylate resin, acrylic amine carbamate (urethane acrylate) resin, polyester acrylate (polyester acrylate) resin, epoxy acrylate (epoxy acrylate) resin or its potpourri.
The material that blooming of the present invention is base materials employed can be any the technical field of the invention and has and know the knowledgeable institute well known, for example glass or plastics usually.Above-mentioned plastic basis material can be made of one or more polymer resin layer.Kind in order to the resin that constitutes above-mentioned polymer resin layer there is no particular restriction, it for example is selected from following group: vibrin (polyester resin), as polyethylene terephthalate (polyethylene terephthalate, PET) or Polyethylene Naphthalate (polyethylene naphthalate, PEN), polyacrylate resin (polyacrylateresin), as polymethylmethacrylate (polymethyl methacrylate, PMMA), polyolefin resin (polyolefin resin), as tygon (PE) or polypropylene (PP), poly-cyclic olefin resins (polycycloolefinresin), polyimide resin (polyimide resin), polycarbonate resin (polycarbonate resin), polyurethane resin (polyurethane resin), Triafol T (triacetyl cellulose, TAC), PLA (polylactic acid) and combination thereof, but not as limit.Wherein, preferable system is selected from vibrin, polycarbonate resin and combination thereof; Better is polyethylene terephthalate.The thickness of base material depend on usually the demand of the optical articles desiring to make, be generally 15 microns to 300 microns.
For reaching the light diffusion effect, contain the resinous coat of organic granular and cement having coating on the substrate surface of microstructure.The organic granular that is comprised in the resinous coat there is no particular restriction, it is such as but not limited to acrylate resin, styrene resin, amido formate resin, silicone resin or they's potpourri, be preferably acrylate resin or silicone resin, be more preferred from acrylate resin, its acrylic ester monomer that comprises the acrylic ester monomer of at least a monofunctional and at least a multiple functional radical is as polymerized unit, and wherein the acrylic ester monomer of all multiple functional radicals system accounts for about 30 to 70% of total monomer weight.The present invention uses at least a monomer with multiple functional radical, makes to carry out cross-linking reaction between monomer, to increase the degree of crosslinking of prepared organic particle.By this, can increase the hardness of organic granular, promote its scratch resistance fastness to rubbing, improve the solvent resistance of particle simultaneously cement.
The acrylic ester monomer that is applicable to monofunctional of the present invention can be selected from, but is not limited to, by methyl methacrylate (methyl methacrylate; MMA), butyl methacrylate, 2-phenoxyethyl acrylate (2-phenoxyethyl acrylate), ethoxyquin 2-phenoxyethyl acrylate (ethoxylated2-phenoxy ethylacrylate), 2-(2-ethoxy ethoxy) ethyl propylene acid esters (2-(2-ethoxyethoxy) ethylacrylate), ring trimethylolpropane dimethoxym ethane acrylate (cyclic trimethylolpropane formalacrylate), β-propyloic acrylic ester (β-carboxyethyl acrylate), lauric acid methacrylate (lauryl methacrylate), isooctyl acrylate (isooctyl acrylate), stearic acid methacrylate (stearyl methacrylate), isodecyl acrylate (isodecyl acrylate), isobornyl methacrylate (isoborny methacrylate) Benzyl base acrylate (benzyl acrylate), 2-hydroxyethyl methacrylate phosphate (2-hydroxyethyl metharcrylate phosphate), hydroxy-ethyl acrylate (hydroxyethyl acrylate, HEA), methacrylic acid-2-hydroxy methacrylate (2-hydroxyethylmethacrylate, HEMA) and the group that forms of they's potpourri.
The acrylic ester monomer that is applicable to multiple functional radical of the present invention can be selected from, but be not limited to, by 3-hydroxyl-2,2-neopentanoic acid 3-hydroxyl-2,2-dimethyl propyl ester diacrylate (hydroxypivalyl hydroxypivalatediacrylate), ethoxyquin 1,6-hexanediyl ester (ethoxylated1,6-hexanedioldiacrylate), propylene glycol diacrylate (dipropylene glycol diacrylate), tristane dimethanol diacrylate (Tricyclodecane dimethanol diacrylate), ethoxyquin propylene glycol diacrylate (ethoxylated dipropylene glycol diacrylate), neopentylglycol diacrylate (neopentyl glycol diacrylate), the third oxidation neopentylglycol diacrylate (propoxylatedneopentyl glycol diacrylate), ethoxyquin bisphenol a dimethacrylate (ethoxylatedbisphenol-A dimethacrylate), the 2-methyl isophthalic acid, ammediol diacrylate (2-methyl-1,3-propanediol diacrylate), ethoxyquin-2-methyl isophthalic acid, ammediol diacrylate (ethoxylated2-methyl-1,3-propanediol diacrylate), 2-butyl-2-ethyl-1, ammediol diacrylate (2-butyl-2-ethyl-1,3-propanediol diacrylate), ethylene glycol dimethacrylate (ethylene glycol dimethacrylate; EGDMA), diethylene glycol dimethylacrylate (diethyleneglycol dimethacrylate), three (2-hydroxyethyl) isocyanic acid triacrylate (Tris (2-hydroxyethyl) isocyanurate triacrylate), pentaerythritol triacrylate (pentaerythritoltriacrylate), ethoxyquin trimethylolpropane triacrylate (ethoxylated trimethylolpropanetriacrylate), the third oxidation trimethylolpropane triacrylate (propoxylated trimethylolpropanetriacrylate), trimethylol-propane trimethacrylate (trimethylolpropanetrimethacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), ethoxyquin tetramethylol methane tetraacrylate (ethoxylated pentaerythritol tetraacrylate), two-trimethylolpropane tetra-acrylate (ditrimethylolpropane tetraacrylate), the third oxidation tetramethylol methane tetraacrylate (propoxylated pentaerythritol tetraacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), dipentaerythritol acrylate (dipentaerythritolhexaacrylate), tripropylene glycol dimethylacrylate (tripropylene glycol dimethacrylate), 1,4-butanediol dimethylacrylate (1,4-butanediol dimethacrylate), 1,6-hexanediol dimethacrylate (1,6-hexanediol dimethacrylate), allylation dimethacrylate cyclohexyl (allylatedcyclohexyl dimethacrylate), dimethacrylate isocyanates (isocyanuratedimethacrylate), ethoxylated trimethylolpropane trimethyl acrylic ester (ethoxylated trimethylolpropane tri-methacrylate), propoxylated glycerol trimethyl acrylic ester (propoxylated glyceroltri-methacrylate), trimethylol-propane trimethacrylate (trimethylol propanetri-methacrylate), the group that three (propylene oxygen ethyl) isocyanates (tris (acryloxyethyl) isocyanurate) and they's potpourri is formed.
According to a better embodiment of the present invention, the organic granular that is comprised in the resinous coat is by the polyacrylate resin particle that monomer constituted that comprises methyl methacrylate and ethylene glycol dimethacrylate, wherein the weight ratio of methyl methacrylate monomer and ethylene glycol dimethacrylate monomer can be 70:30,60:40,50:50,40:60 or 30:70 etc., consumption when the ethylene glycol dimethacrylate monomer, count at about 30 to about 70% o'clock with the total monomer consumption, its degree of crosslinking is preferable.
According to the present invention, the shape of a plurality of organic granulars that comprised in the above-mentioned resinous coat there is no particular restriction, for example can be spheroidal, oval sphere or irregular shape etc., is preferably spheroidal.Described organic granular has single mean grain size, and it is between about 1 micron to about 100 microns, and is preferable between about 2 microns to about 50 microns, best between about 8 microns to about 20 microns.Described organic granular is better to have about 8,10,12,15,18 or 20 microns mean grain size.Above-mentioned organic granular has the light scatter effect.In order to improve the briliancy of optical thin film, organic granular used in the present invention has narrow size distribution, and the size distribution of described organic granular is in pact ± 30% scope that falls within described mean grain size, preferable falling within pact ± 15% scope.For example, according to the present invention, when using mean grain size to be the organic granular that falls within ± 30% scope approximately of described mean grain size for about 15 microns and size distribution, the size distribution of the organic granular in the described resinous coat is to fall within about 10.5 microns extremely in about 19.5 microns scope.Use mean grain size to fall within about 1 organic granular compared to existent technique to about 30 micrometer ranges for about 15 microns and size distribution, organic granular of the present invention not only only has single mean grain size value, and particle size distribution range is narrow, so the present invention can avoid having big difference because of the organic granular size, make the light scatter scope excessive and cause light source waste, so can improve the briliancy of optical thin film.
In the resinous coat of the present invention, organic granular is per 100 weight portion cement solids about 100 organic granulars to about 300 weight portions with respect to the amount of cement solid, is preferably the organic granular of about 120 to 220 weight portions of per 100 weight portion cement solids.The distribution of organic granular of the present invention in resinous coat there is no particular restriction, evenly distributes but preferable organic granular system is individual layer.Individual layer evenly distributes except that reducing the raw materials cost, also can reduce the light source waste, and then promotes the briliancy of optical thin film.
Be used in the cement among the present invention, owing to must allow light see through, it is preferably water white transparency person.The optional free ultraviolet hardening resin of cement of the present invention, thermoset resin (thermal setting resin), thermoplastic resin (thermal plasticresin) and composition thereof constitute group, and optionally be heating and curing, ultraviolet curing or heating and two (dual curing) modes of solidifying of ultraviolet ray handle and form resinous coat of the present invention.In one embodiment of the present invention, for the hardness that strengthens coating and prevent film warpage (warp), the cement that uses comprises ultraviolet hardening resin and is selected from the resin of selecting in the group that is made up of thermoset resin, thermoplastic resin and composition thereof, and handle by heating and two (dual curing) modes of solidifying of ultraviolet ray, make the resinous coat of formation have remarkable thermotolerance and minimum volumetric shrinkage (shrinkage).
Can be used for ultraviolet hardening resin resin system of the present invention and constituted, be preferably acrylic ester monomer by comprising at least a acrylic monomer or acrylic ester monomer with one or more functional group.Can be used for the acrylic ester monomer among the present invention, such as but not limited to, methacrylate monomers, acrylate monomer, amido formate acrylate (urethane acrylate) monomer, polyester acrylate (polyester acrylate) monomer or epoxy acrylate (epoxy acrylate) monomer etc. are preferably acrylate monomer.
Say it for example, the acrylic ester monomer that is applicable to ultraviolet hardening resin of the present invention can be selected from and comprise methyl methacrylate, butyl acrylate, 2-phenoxyethyl acrylate (2-phenoxy ethyl acrylate), ethoxyquin 2-phenoxyethyl acrylate (ethoxylated2-phenoxy ethyl acrylate), 2-(2-ethoxy ethoxy) ethyl propylene acid esters (2-(2-ethoxyethoxy) ethyl acrylate), ring trimethylolpropane dimethoxym ethane acrylate (cyclic trimethylolpropane formal acrylate), β-propyloic acrylic ester (β-carboxyethyl acrylate), lauric acid methacrylate (lauryl methacrylate), isooctyl acrylate (i sooctyl acrylate), stearic acid methacrylate (stearyl methacrylate), isodecyl acrylate (isodecyl acrylate), isobornyl methacrylate (isoborny methacrylate) Benzyl base acrylate (benzylacrylate), 3-hydroxyl-2,2-neopentanoic acid 3-hydroxyl-2,2-dimethyl propyl ester diacrylate (hydroxypivalyl hydroxypivalate diacrylate), ethoxyquin 1,6-hexanediyl ester (ethoxylated1,6-hexanediol diacrylate), propylene glycol diacrylate (dipropyleneglycol diacrylate), tristane dimethanol diacrylate (Tricyclodecane dimethanoldiacrylate), ethoxyquin propylene glycol diacrylate (ethoxylated dipropylene glycoldiacrylate), neopentylglycol diacrylate (neopentyl glycol diacrylate), the third oxidation neopentylglycol diacrylate (propoxylated neopentyl glycol diacrylate), ethoxyquin bisphenol a dimethacrylate (ethoxylated bisphenol-A dimethacrylate), the 2-methyl isophthalic acid, ammediol diacrylate (2-methyl-1,3-propanediol diacrylate), ethoxyquin-2-methyl isophthalic acid, ammediol diacrylate (ethoxylated2-methyl-1,3-propanediol diacrylate), 2-butyl-2-ethyl-1, ammediol diacrylate (2-butyl-2-ethyl-1,3-propanediol diacrylate), ethylene glycol dimethacrylate (ethylene glycol dimethacrylate), diethylene glycol dimethylacrylate (diethylene glycoldimethacrylate), 2-hydroxyethyl methacrylate phosphate (2-hydroxyethyl metharcrylatephosphate), three (2-hydroxyethyl) isocyanic acid triacrylate (Tris (2-hydroxyethyl) isocyanurate triacrylate), pentaerythritol triacrylate (pentaerythritoltriacrylate), ethoxyquin trimethylolpropane triacrylate (ethoxylated trimethylolpropanetriacrylate), the third oxidation trimethylolpropane triacrylate (propoxylated trimethylolpropanetriacrylate), trimethylol-propane trimethacrylate (trimethylolpropanetrimethacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), ethoxyquin tetramethylol methane tetraacrylate (ethoxylated pentaerythritol tetraacrylate), two-trimethylolpropane tetra-acrylate (ditrimethylolpropane tetraacrylate), the third oxidation tetramethylol methane tetraacrylate (propoxylated pentaerythritol tetraacrylate), tetramethylol methane tetraacrylate (pentaerythritol tetraacrylate), dipentaerythritol acrylate (dipentaerythri tolhexaacrylate), hydroxy-ethyl acrylate (hydroxyethyl acrylate, HEA), methacrylic acid-2-hydroxy methacrylate (2-hydroxyethyl methacrylate, HEMA), tripropylene glycol dimethylacrylate (tripropylene glycol dimethacrylate), 1,4-butanediol dimethylacrylate (1,4-butanediol dimethacrylate), 1, the 6-hexanediol dimethacrylate (1,6-hexanedioldimethacrylate), allylation dimethacrylate cyclohexyl (allylated cyclohexyldimethacrylate), dimethacrylate isocyanates (i socyanurate dimethacrylate), ethoxylated trimethylolpropane trimethyl acrylic ester (ethoxylated trimethylol propanetri-methacrylate), propoxylated glycerol trimethyl acrylic ester (propoxylated glyceroltri-methacrylate), trimethylol-propane trimethacrylate (trimethylol propanetri-methacrylate), the group that three (propylene oxygen ethyl) isocyanates (tris (acryloxyethyl) isocyanurate) and they's potpourri is formed.Preferably, this acrylic ester monomer comprises dipentaerythritol acrylate, trimethylolpropane triacrylate and pentaerythritol triacrylate.
For increasing the film forming of resinous coat 203, ultraviolet hardening resin used in the present invention can optionally comprise molecular weight between about 10
3To about 10
4Oligomer, this type of oligomer is a persond having ordinary knowledge in the technical field of the present invention institute well known, acrylic ester oligomer for example, it is such as but not limited to the amido formate acrylate, as fatty amine carbamate acrylate (aliphatic urethane acrylate), fatty amine carbamate six acrylate (aliphatic urethane hexaacrylate), aromatic amine carbamate six acrylate (aromaticurethane hexaacrylate); Epoxy acrylate is as bisphenol-A epoxy diacrylate (bisphenol-A epoxydiacrylate), phenolic aldehyde epoxy acrylate (novolac epoxy acrylate); Polyester acrylate is as polyester diacrylate (polyester diacrylate); Or pure acrylic acid ester.
Can be used for thermoset resin of the present invention, its mean molecular weight is generally between about 10
4To about 2 * 10
6Between, preferable between about 2 * 10
4To about 3 * 10
5Between, better for about 4 * 10
4To about 10
5Between.Thermoset resin of the present invention is optional from containing carboxyl (COOH) and/or the hydroxyl (group that vibrin OH), epoxy resin, polymethacrylate resin, polyamide resin, fluoroplast, polyimide resin, polyurethane resin, alkyd resin (alkyd resin) and composition thereof are formed, be preferably contain carboxyl (COOH) and/or hydroxyl (polymethacrylate resin OH) or polyacrylate resin are as the polymethylacrylic acid polyol resin.
Can be used for the optional autopolyester resin of thermoplastic resin of the present invention; Polymethacrylate resin is as polymethylmethacrylate (PMMA); And the group that forms of they's potpourri.
The employed resinous coat of optical thin film of the present invention, its thickness depends on the demand of the optical articles of wishing to get usually, and is between general about 5 microns to about 30 microns, preferable between about 10 microns to about 25 microns
Resinous coat of the present invention, except that comprising organic granular and cement, also can optionally comprise any persond having ordinary knowledge in the technical field of the present invention's known additives, it is such as but not limited to leveling agent, stabilization agent, antistatic agent, rigidizer, fluorescer, light initiator or ultraviolet light absorber.
In addition, when base material is plastic basis material, for avoiding the plastic basis material yellow, can in resinous coat, add the inorganic particles that tool absorbs ultraviolet ability, such as but not limited to zinc paste, strontium titanates, zirconia, aluminium oxide, titania, calcium sulphate, barium sulphate, lime carbonate or its potpourri, be preferably titania, zirconia, aluminium oxide, zinc paste or its potpourri.The particle diameter of above-mentioned inorganics be generally about 1 to about 100 how rice (nanometer, nm), be preferably about 20 how rice to about 50 rice how.
For avoiding optical thin film of the present invention and other backlight module component to produce suction-operated, improve diffusion effect, as shown in Figure 3, optical thin film of the present invention can prevent layer 121, about 5 microns to about 10 microns of its thickness range with respect to another surface-coated one adherence of microstructured layers 107 if necessary in base material 101.Be applicable to adherence prevent layer in 121 cement 122 and the kind of organic granular 123 be as the definien of the previous institute of this paper.
Adherence of the present invention prevents that organic granular in the layer from being the organic granular of about 0.1 weight portion of per 100 weight portion cement solids to about 5 weight portions with respect to the amount of this cement solid.The mean grain size of organic granular is for about 5 microns to about 10 microns, is preferably about 5,8 or 10 microns, and the best is about 8 microns.
The adherence of optical thin film of the present invention prevents that layer can have component identical or inequality with resinous coat.
Blooming of the present invention has according to JIS K7136 standard method measures mist degree between about 80 to about 98%, and preferably, and described optical thin film has and is not less than about 60% total light transmittance according to JIS K7136 standard method measurement.Therefore, optical thin film of the present invention can be used in the light source device, for example: advertising lamp box and flat-panel screens etc., especially can be used in LCD, and be arranged on the exiting surface top of planar light source device, as light-collecting component.In addition, blooming of the present invention is effective uniform light not only, and has good briliancy simultaneously, therefore can use two or three bloomings of the present invention, replaces the previous design of using concentration piece (prism film) to add diffusion barrier.
In addition, blooming of the present invention has the effect of even light and optically focused, and because the organic granular of blooming of the present invention is scattered in formed groove between adjacent two column structures, the organic granular that therefore can solve the prior art diffusion barrier is assembled each other or is sticked and influences the uniformity coefficient of organic granular or make and produce dim spot on the display surface.
Below about aforementioned and other technology contents, characteristics and effect of the present invention, cooperate the graphic structure that illustrates blooming of the present invention now, only non-in order to limit the scope of the invention.Modification and change that any personage who is familiar with this skill can reach easily are included in this case instructions disclosure.
Fig. 4 is a better embodiment of the present invention, and it illustrates that a blooming of the present invention is to comprise base material 101, and described substrate surface has a microstructured layers 107.Described microstructured layers comprises plurality of parallel column structure 109; And a resinous coat, described resinous coat comprises a plurality of organic granulars 113 and cement 110.Form groove between wherein adjacent two parallel column structures, 113 of described cement 110 and organic granulars are arranged in formed groove, at least partly the height difference of the summit of described organic granular and the column structure bottom 103 of base material is greater than 103 height difference bottom the column structure of the peak 105 of column structure and described base material.
Fig. 7, Fig. 8 and Fig. 9 are respectively other better embodiment of the present invention, and adjacent column structure can join or not join each other.
The embodiment that adjacent column structure joins each other, as shown in Figure 4, be that the paddy of arbitrary column structure 109 and the paddy of adjacent column structure are joined each other, the vertical range of described relatively column structure bottom, the peak 105 of described column structure 103 is H, the drift angle angle of column structure is 20, the radius of organic granular 113 is R, and described organic granular 113 is tangent to each other with obelisk shape structure, and in the described organic granular at least partly organic granular satisfy following formula:
As Fig. 5 and shown in Figure 6.
The embodiment that adjacent column structure does not join each other, as Fig. 7 and shown in Figure 9, promptly separated by a distance between column structure 109 and column structure, form the flat type groove between the paddy of adjacent two column structures, wherein Fig. 7 and Fig. 9 are different microstructured layers 107 generation types, Fig. 7 forms at base material one surface coated plurality of parallel column structure, and Fig. 9 prepares in integrally formed mode with base material.
Column structure can be prism column structure (shown in column structure 109 among Fig. 4, Fig. 7 and Fig. 9) or arc column structure (shown among Fig. 8 109).When column structure is prism column structure and adjacent column structure when joining each other, what form between adjacent obelisk shape structure is shaped as vee-cut, and organic granular 113 promptly is arranged in the groove of V-arrangement, as shown in Figure 4.When column structure is arc column structure and adjacent column structure when joining each other, can form arcuate furrow, as shown in Figure 8.Groove structure of the present invention is preferably the arcuate furrow structure.
Blooming of the present invention, the shape of the arcuate furrow of wherein said microstructured layers 301 there is no particular restriction, for example can be circular arc, ellipse arc or parabolic arc groove, be preferably arc-shaped groove, the radius-of-curvature r of described arcuate furrow, the mean radius Ra of radius-of-curvature r and organic granular 302 is a ratio, as shown in figure 10, the ratio of the mean radius Ra of its radius-of-curvature r and organic granular can be 1:100 to 100:1, preferable ratio is 1:5 to 5:1, and best ratio is 1:2 to 2:1.
The linear column structure that blooming of the present invention, wherein said column structure can extend straight, as shown in figure 11.Described column structure also can curved extension the curve column structure, as shown in figure 12.
Blooming of the present invention utilizes structural configuration, make organic granular be subjected to arround the barrier effect of structure, thereby limit its degree of freedom, and then reduce the arrangement that preface is assembled or sticked and have to organic granular each other, can take into account optically focused and diffusion effect, reach homogenize light, promote the effect of optics briliancy.
Above-described embodiment, the present invention embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (21)
1. a blooming is characterized in that: comprise: the base material with microstructure; And be positioned at resinous coat on the microstructure of described base material, it comprises a plurality of organic granulars and cement, wherein said microstructure comprises a plurality of column structures, described column structure is equilateral column structure, described organic granular is the organic granulars of per 100 weight portion cement solids between 100 to 300 weight portions with respect to the amount of cement solid, described organic granular and column structure are tangent to each other, and Hb 〉=H, wherein Hb is the vertical range of relative this column structure bottom, summit of described organic granular, and H is the vertical range of relative this column structure bottom, the peak of column structure.
2. blooming as claimed in claim 1 is characterized in that: described microstructure comprises the plurality of parallel column structure.
3. blooming as claimed in claim 2 is characterized in that: described parallel column structure has equal height, width and drift angle angle.
4. blooming as claimed in claim 1 is characterized in that: described column structure is to be prism column structure, arc column structure or its mixing.
5. blooming as claimed in claim 4 is characterized in that: described column structure is to be the prism column structure, and described prism column structure is to join and satisfied following formula:
Wherein H is meant the vertical range of relative this column structure bottom, peak of column structure, and 2 θ are meant the drift angle angle of column structure, and R is meant the radius of organic granular.
6. blooming as claimed in claim 1 is characterized in that: described column structure is to be linear column structure, curve column structure, broken line column structure or its mixing.
7. blooming as claimed in claim 1 is characterized in that: described organic granular has single mean grain size, and the size distribution of described organic granular is to fall within this mean grain size in ± 30% scope.
8. blooming as claimed in claim 1 is characterized in that: the mean grain size of described organic granular is in 1 to 100 micrometer range.
9. blooming as claimed in claim 7 is characterized in that: the size distribution of described organic granular is to fall within the mean grain size of described organic granular in ± 15% scope.
10. blooming as claimed in claim 1 is characterized in that: described base material with microstructure is integrally formed.
11. blooming as claimed in claim 1 is characterized in that: described base material with microstructure is by forming at a plurality of column structures of base material one surface coated.
12. blooming as claimed in claim 1 is characterized in that: described organic granular is the group that is made up of acrylate resin, methacrylate resin, styrene resin, amido formate resin, silicone resin and composition thereof for being selected from.
13. blooming as claimed in claim 1 is characterized in that: described base material has an adherence in another surface with respect to this resin-coated surface and prevents layer.
14. a blooming is characterized in that: comprise: the base material with microstructure; And be positioned at resinous coat on the microstructure of described base material, it comprises a plurality of organic granulars and cement, these described organic granulars are polyacrylate resins, its acrylic ester monomer that comprises the acrylic ester monomer of at least a monofunctional and at least a multiple functional radical is as polymerized unit, and wherein the acrylic ester monomer of all multiple functional radicals system accounts for total monomer weight between 30 to 70%; Described organic granular has single mean grain size, and the size distribution of described organic granular is to fall within this mean grain size in ± 30% scope; And described organic granular is the organic granulars of per 100 weight portion cement solids between 100 to 300 weight portions with respect to the amount of cement solid, described organic granular and column structure are tangent to each other, and Hb 〉=H, wherein Hb is the vertical range of relative this column structure bottom, summit of described organic granular, and H is the vertical range of relative this column structure bottom, the peak of column structure.
15. blooming as claimed in claim 14 is characterized in that: described microstructure comprises plurality of parallel prism column structure, and described column structure is to join and is equilateral column structure.
16. blooming as claimed in claim 14 is characterized in that: described polyacrylate resin is made of the monomer that comprises methyl methacrylate and ethylene glycol dimethacrylate.
17. blooming as claimed in claim 14 is characterized in that: described resinous coat has the thickness between 5 microns to 30 microns.
18. blooming as claimed in claim 16 is characterized in that: the mean grain size system of described organic granular is between 2 to 50 microns.
19. blooming as claimed in claim 14 is characterized in that: the organic granular that is comprised in the described resinous coat is the organic granulars of per 100 weight portion cement solids between 120 weight portion to 220 weight portions with respect to the amount of cement solid.
20. blooming as claimed in claim 14 is characterized in that: described base material is to be group that free polyethylene terephthalate, polymethylmethacrylate, poly-cyclic olefin resins, Triafol T, PLA and composition thereof constitute.
21. blooming as claimed in claim 14 is characterized in that: described cement is to be selected from by group that ultraviolet hardening resin, thermoset resin, thermoplastic resin and composition thereof constitute.
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| CN2008101493621A CN101377552B (en) | 2008-09-23 | 2008-09-23 | Optical film |
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