CN101520524B - Optical diffusion film - Google Patents
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- CN101520524B CN101520524B CN2008100816067A CN200810081606A CN101520524B CN 101520524 B CN101520524 B CN 101520524B CN 2008100816067 A CN2008100816067 A CN 2008100816067A CN 200810081606 A CN200810081606 A CN 200810081606A CN 101520524 B CN101520524 B CN 101520524B
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Abstract
The invention provides an optical diffusion film, which comprises a hardened resin that is made from the cross bonding and hardening of a double hexacyclic acrylic acid monomer and a urethane acrylatemonomer, an optical diffusing particle and a hardening agent; wherein the introduction of the double hexacyclic acrylic acid monomer can raise the surface hardness and the yellowing resistance, and t he addition of the urethane acrylate monomer can increase the adhesiveness to a base material.
Description
Technical field
The present invention relates to a kind of optical diffusion film, and particularly relates to a kind of tool high rigidity, work simplification and optical diffusion film that can anti-xanthochromia.
Background technology
(liquid crystal display LCD) has that volume is little, an advantage such as light weight and low operating voltage to LCD, widely is applied in personal mobile communication and the household appliances in recent years.Because liquid crystal panel itself is not luminous, so need to add a backlight module, and general backlight film group comprises: light source, light guide plate, optical diffusion film and brightness enhancement film, wherein the optical diffusion film function is that (light emitting diode, pointolite LED) converts a uniform surface light source to the line source of cold-cathode tube or light emitting diode.Because day by day improve for large-sized demand in market, higher to the picture quality requirement of LCD, in order to obtain more uniform surface light source, it is important that the development research of optical diffusion film more seems.
In the technology of general optical diffusion film, mainly be on transparent plastic substrate, the resin that coating one deck contains diffusion particle forms a diffusion layer, because of refractive index difference between resin and diffusion particle, when making incident light, cause optical effect (refraction, reflection or diffraction) through diffusion layer.
Jap.P. JP 2006126822 provides an optical diffusion film, it comprises the diffusion particle of acrylic acid ammonia ester (acryl-urethane) and the cross-linked resin of acrylate (acrylate) and isocyanates (isocyanate), owing between diffusion particle and the resin identical functional group is arranged, so tack is good, and, skin hardness is improved by the ratio of regulation and control resin.
U.S. Pat 2006/0246233 provides an optical diffusion film, and its composition comprises: (1) diffusion particle; (2) resin; (3) smoothing agent comprises fluorine-containing alkyl (fluoroalkyl) polymkeric substance and alkyl acryloxy (alkylacryloxy) polymkeric substance.This diffusion barrier can reduce point defect (point defect), effectively promotes the quality of diffusion light.
Yet at present optical diffusion film needs a large amount of organic solvents mainly with solvent cast technology, is quite not environmental protection.Moreover the hardness of optical diffusion film is low excessively, when contacting with base material, causes trickle scratch easily, also has optical diffusion film to produce xanthochromia because of heat, and above-mentioned phenomenon all can make picture quality reduce.
Therefore, industry is needed the optical diffusion film of high picture quality of a kind of tool and work simplification badly.
Summary of the invention
One of purpose of the present invention just provides a kind of optical diffusion film with high picture quality and work simplification.
For reaching above-mentioned and other purpose, the present invention mainly provides a kind of optical diffusion film, and it comprises: a hardening resin by two six cyclic group acrylic monomerss and the crosslinked sclerosis of an ammonia ester acrylic monomers form, a smooth diffusion particle and a rigidizer.
For above and other objects of the present invention, feature and advantage can be become apparent, cited below particularlyly go out preferred embodiment, be described in detail below:
Embodiment
The invention provides a kind of hardening resin, its composition comprises two six cyclic group acrylic monomerss and an ammonia ester acrylic monomers.This sclerosis resin can be arranged in pairs or groups with the light diffusion particle, forms an optical diffusion film.
Two six cyclic group acrylic acid of the present invention (DHA) structure of monomer is suc as formula (I) for decahydronaphthalene acrylate, decahydronaphthyl acrylate:
R wherein
1, R
2Independent separately is H or C1-C5 alkyl, for example: 2-decahydronaphthalene acrylate (2-DHA) monomer.The ring texture of six cyclic groups can promote the hardness on surface in the structure, reduces the trickle scratch on surface, and avoids the generation of xanthochromia phenomenon.
The structure of ammonia ester acrylic monomers of the present invention is suc as formula (II):
Formula (II)
R wherein
1Be C1～C12 aliphatics or aromatic series; R
2Be C1～C4 straight chain aliphatics.In one embodiment, this ammonia ester acrylic monomers be methylene tri isocyanide acrylate (hexamethylenepolyisocyanate triacrylate HPT), has structural formula (III):
Formula (III)
The advantage of ammonia ester acrylic monomers of the present invention is to have good then property between this structure and the base material.
Two six cyclic group acrylic monomerss of the present invention are with after ammonia ester acrylic monomers mixes according to part by weight 5/95～50/50, and the adding part by weight accounts for the rigidizer of hardening resin 1～7%, forms a hardening resin.The kind of rigidizer can be thermoinitiators or photo-hardening agent.Thermoinitiators can be azo-compound (azocompound), superoxide (peroxide) and persulfate compounds (persulfate compound).Azo-compound comprises following compounds: 2,2 '-two (the 4-methoxies-2 of azo, the 4-methyl pentane nitrile) (2,2 '-azobis (4-methoxy-2,4-dimethylvaleronitrile)), 2,2 '-azo diisobutyl amidine dihydrochloride (2,2 '-azobis (2-amidinopropane) dihydrochloride), 2,2 '-ABVN (2,2 '-azobis (2,4-dimethylvaleronitrile)), 2,2 '-azoisobutyronitrile (2,2 '-azobis (isobutyronitrile)) or 2,2 '-azo 2-methyl n-Butyronitrile (2,2 '-azobis-2-methylbutyronitrile); Superoxide comprises following compounds: peroxidating benzene (benzoylperoxide), acetyl peroxide (acetyl peroxide), lauroyl peroxide base (lauroyl peroxide), didecyl acyl peroxide (decanoyl peroxide), the heavy phosphoric acid (di (2-ethylhexyl) peroxydicarbonate) of two-(2-ethylhexyl) peroxidating or peroxide trimethylace tonitric t-butyl ester (t-butylperoxypivalate); Persulfate compounds comprises following compounds: potassium persulfate (potassiumpersulfate), sodium peroxydisulfate (sodium persulfate) or ammonium persulfate (ammonium persulfate), these thermoinitiators can be used alone or as a mixture.
The photo-hardening agent can be the acetophenone based compound, for example: diethoxy acetophenone, 2-hydroxy-2-methyl-1-phenyl-propane-1-ketone, benzyl dimethyl acetal, 1-(4-isopropyl phenyl)-2-hydroxy-2-methyl propane-1-ketone, 4-(2-hydroxyl-oxethyl) phenyl-(2-hydroxyl-2-propyl group) ketone, 1-hydroxy-cyclohexyl benzophenone or 2-methyl Lin Ji-(4-sulphomethyl phenyl) propane-1-ketone; Dehydrogenation type benzophenone Photoepolymerizationinitiater initiater; for example: benzophenone, o-benzoyl benzoic acid methyl-4-phenyl benzophenone, 4-4 '-dichloro benzophenone, dihydroxy benaophenonel, 4-benzoyl-4 '-methyl-diphenylsulfide, acrylated benzophenone, 3-3 '-4-4 '-four (normal-butyl hydrop) benzophenone or 3-3 '-dimethyl-4-methoxy benzophenone, these photo-hardening agent can be used alone or as a mixture.
Smooth diffusion particle of the present invention is organic particle or inorganic fine particles, for example is polystyrene, polymethylmethacrylate, methyl methacrylate and styrene copolymerized compound, polycarbonate, tygon, silicon resin, lime carbonate, silicon dioxide, titania or aforesaid combination.The size distribution of light diffusion particle is 3 μ m～25 μ m.
Smooth diffusion particle of the present invention is with after hardening resin mixes according to part by weight 1/99～50/50, evenly coat on the base material, as polyethylene terephthalate (polyethylene terephthalate, PET) base material, the about 10-50 μ of thickness m, via ultraviolet light or heat treated, make hardening of resin again.The mode of coating can be coating technique known in the field, as: flywheel knife formula, air-blade type, scraper type, reverse formula cylinder or slit coating.
Method with ultraviolet light polymerization is exemplified below: the light diffusion particle is with after hardening resin can mix according to part by weight 1/99～50/50, add light trigger (as Ciba Irgacure 184), evenly coat polyethylene terephthalate (polyethylene terephthalate, PET) on the base material, shine with ultraviolet light (600W), the time in about 5～30 seconds, can obtain optical diffusion film.Utilize the method for UV-irradiation, can effectively shorten the process time, reduce the solvent use amount.
Method with heat curing is exemplified below: the light diffusion particle is with after hardening resin can mix according to part by weight 1/99～50/50, add 2,2 '-azoisobutyronitrile (2,2 '-azobis (isobutyronitrile)) and peroxidating benzene (benzoyl peroxide) as thermoinitiators, evenly coat polyethylene terephthalate (polyethylene terephthalate, PET) on the base material, under 100～120 ℃ of high temperature, (be preferably 120 ℃), after about 3～5 hours, can obtain optical diffusion film.
Resin of the present invention is through a series of physical property measurement, and data presentation resin hardness can reach more than the pencil hardness H, and the best can reach 2H.And surperficial then property (test of hundred lattice) is all passed through, and has well all property really between expression resin and the base material.Learn the anti-xanthochromia characteristic of resin tool by hot and humid test result.
Optical diffusion film of the present invention is measured through a series of character, and experimental result shows that its penetration all can reach 70%, is silicon dioxide (SiO when adding particle
2) time, penetration more can reach more than 91%.And mist degree and diffusibleness can influence with quantity along with the kind of adding the light diffusion particle, and when the polystyrene (PS) of interpolation 25%, mist degree can reach 83%; As the silicon dioxide (SiO that adds 25%
2) time, diffusibleness can reach more than 7, is learnt by above-mentioned data, and every optical property of optical diffusion film of the present invention can meet the requirement of commercially produced product.
[embodiment]
Employed measuring method among the embodiment is described below:
1. penetration/mist degree: use Nippon Denshoku NDH2000, test method conforms ASTMD1003 standard.
2. property (test of hundred lattice) is followed on the surface: measure resin and polyethylene terephthalate (polyethylene terephthalate, PET) the base material property followed, use ZENHTNER ZCC 2087.5cross-cut tester, meet ASTM D3359-02 standard.
3. glass transition temperature (Tg): use type Seiko SSC-5200 type DSC, temperature is done correction with indium (Indium), sample thief amount 5-10 milligram, and sweep speed is 10 ℃/min, test gas flow velocity 100ml/min under nitrogen.
4. thermal cracking temperature (Td): use Perkin Elmer Pyris I type, operating temperature is 25 ℃～400 ℃, and programming rate is 10 ℃/min.
5. hardness (pencil hardness): use Elcometer 3086M002 electric pencil sclerometer, meet ASTM D3363-05 standard.
6. water absorptivity: operating process meets ASTM D570-98 standard.Elder generation's cutting specimen is toasted sample 24 hours under 60 ℃ of vacuum environments to 5cm * 5cm size again, to remove moisture content, measures its dry weight W
DryThe back sample that will dewater is inserted in the Water Tank with Temp.-controlled, leaves standstill under 30 ℃ of environment 24 hours and takes out immediately, with the light press mold material of dried cloth surface, guarantees to measure its weight in wet base W again after the surperficial exclusion accumulation
WetThe sample water-intake rate can see through following formula and calculate it:
Water-intake rate (Water Absorption Rate)=(W
Wet-W
Dry)/W
Dry* 100%
7. refractive index: use incidence angle variable Stoker formula elliptical polarizer (L116SF), test method conforms ASTM D542 standard.
8. hot and humid test: use THS A4L
+/ 150 types, service condition are that (5cm * 5cm) in relative humidity 85%, temperature was tested 300 hours down for 60 ℃, and this type meets the ASTMG154 standard with sample.
9. diffusibleness: use Nippon Denshoku GC5000L, test method conforms JIS 8113 standards.
Embodiment 1 preparation ammonia ester acrylic monomers
Flow process 1
The 2-hydroxy ethyl methacrylate
Get 2-hydroxy ethyl methacrylate (2-hydroethyl acrylate) monomer 0.051mole and be dissolved in 1 of 0.017mole, 6-hexa-methylene triisocyanate oligomerization compound (1,6-hexamethylene polyisocyanatetrimer), reacted 8 hours down in 80 ℃ of nitrogen environments, obtain 1,6-hexa-methylene three isocyanide acrylate (1,6-hexamethylene polyisocyanate triacrylate, HPT).
Embodiment 2 resin formulas and rerum natura measure
With 1,6-hexa-methylene three isocyanide acrylate (1,6-hexamethylene polyisocyanatetriacrylate, HPT) monomer and 2-hydroxy ethyl methacrylate (2-hydroethyl acrylate, 2-DHA) monomer mixes according to the part by weight of table 1, (Igracure 184,5wt%), mix obtaining a cold coating to add the photo-hardening agent afterwards.(polyethyleneterephthalate, PET) on the base material, the about 24 μ m of thickness then with ultraviolet light (600W) irradiation, the time in about 30 seconds, can obtain hardening resin afterwards coating to be coated polyethylene terephthalate.Afterwards this resin is measured in regular turn its penetration, mist degree, surface then property, glass transition temperature (Tg), thermal cracking temperature (Td), hardness, water absorptivity, refractive index and hot and humid test, data are referring to table 1.
By learning in the table 1, the hardness of resin all reaches more than the H grade, represents that this resin has good hardness.Follow property testing by the surface and learn, resin all passes through test, represents the good then property of tool between this resin and the base material.Can learn that by hot and humid test the numerical value change before and after the experiment is little, the anti-xanthochromia characteristic of expression resin tool.
Table 1
| HPT | HPT- DHA5 | HPT-DHA10 | HPT-DHA20 | HPT- DHA30 | HPT- DHA40 | |
| Form | ||||||
| HPT(％) | 100 | 95 | 90 | 80 | 70 | 60 |
| 2-DHA(％) | 0 | 5 | 10 | 20 | 30 | 40 |
| Irgacure?184 | 5 | 5 | 5 | 5 | 5 | 5 |
| Fundamental property | ||||||
| Penetration | 91.22 | 91.32 | 91.21 | 90.98 | 91.29 | 91.31 |
| Mist degree | 1.73 | 1.48 | 1.32 | 1.58 | 1.55 | 1.67 |
| The surface is property then | By | By | By | By | By | By |
| Tg(℃) | 95.87 | 94.24 | 97.02 | 95.73 | 88.33 | 90.02 |
| Td(℃) | 338.96 | 340.66 | 337.88 | 332.11 | 330.63 | 331.99 |
| Hardness | B | HB | H | 2H | 2H | H |
| Water absorptivity (%) | 0.67 | 0.63 | 0.63 | 0.56 | 0.52 | 0.47 |
| Refractive index | 1.5148 | 1.5144 | 1.5145 | 1.5150 | 1.5165 | 0.5163 |
| Hot and humid test (before/afterwards) | (0.3106，0.3 166) | (0.3105，0. 3164)/(0.3 105，0.316 5) | (0.3105，0.3166)/(0.3106，0.3166) | (0.3105，0.3165)/(0.3106，0.3165) | (0.3104， 0.3164/ (0.3105， 0.3165) | (0.3104， 0.3164)/ (0.3105， 0.3165) |
Embodiment 3 optical diffusion film prescriptions and character measure
In regular turn with HPT, 2-DHA and light diffusion particle, as: polystyrene (PS), polymethylmethacrylate (PMMA) or silicon dioxide (SiO
2), according to the part by weight preparation of table 2, (Irgacure 184,5wt%) get a diffusion barrier coating to add the photo-hardening agent afterwards again.Coating is coated polyethylene terephthalate, and (polyethylene terephthalate PET) on the base material, is 24 μ m with film thickness monitoring.Then with ultraviolet light (600W) irradiation, the time in about 30 seconds is carried out photopolymerization reaction, obtains optical diffusion film.Measure the character of penetration, mist degree and the diffusibleness of diffusion barrier in regular turn, obtain table 3, inquire into the influence of diffusion particle kind and quantity thus above-mentioned characteristic.
Referring to table 3-1, when adding the light diffusion particle of polystyrene (PS), penetration is all greater than 75%.And the PS adding proportion can make mist degree and diffusibleness all improve when improving.
Referring to table 3-2, add silicon dioxide (SiO
2) the light diffusion particle, can make penetration all greater than 90%.And the silicon dioxide adding proportion can make mist degree and diffusibleness all improve when improving.Wherein when adding 25% silicon dioxide, penetration is greater than 93%, and mist degree is greater than 63%, and diffusibleness can reach the level of commercial goods greater than more than 7.
Referring to table 3-3, add the light diffusion particle of polymethylmethacrylate (PMMA), can make penetration all greater than 88%.And the PMMA adding proportion is benefited not quite mist degree and diffusibleness when improving, and is because the refractive index (about 1.53) of PMMA is little with the refractive index difference of resin (about 1.51～1.52), so the ratio raising of interpolation PMMA can't improve mist degree and diffusibleness.
Table 2
| EX1 | EX2 | EX3 | EX4 | EX5 | EX6 | EX7 | EX8 | EX9 | EX10 | EX11 | EX12 | |
| The light diffusion particle | polystyrene | SiO 2 | PMMA | |||||||||
| 2-DHA | 0 | 5 | 10 | 20 | 30 | 40 | 0 | 10 | 20 | 0 | 10 | 20 |
| HPT | 100 | 95 | 90 | 80 | 70 | 60 | 100 | 90 | 80 | 100 | 90 | 80 |
| I-184 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | |
Table 3-1
| EX1 | EX2 | EX3 | EX4 | EX5 | EX6 | ||
| Polystyrene 5％ | Penetration (%) | 89.28 | 89.11 | 89.17 | 89.11 | 89.31 | 89.36 |
| Mist degree (%) | 40.55 | 37.34 | 29.23 | 28.62 | 27.67 | 28.37 | |
| Diffusibleness | 0.56 | 0.81 | 1.09 | 2.44 | 0.56 | 1.19 |
| Polystyrene 10％ | Penetration (%) | 88.75 | 83.40 | 84.13 | 84.15 | 830.5 | 83.78 |
| Mist degree (%) | 48.62 | 70.97 | 72.04 | 71.17 | 69.70 | 72.61 | |
| Diffusibleness | 1.16 | 3.34 | 2.51 | 3.86 | 6.84 | 5.63 | |
| Polystyrene 15％ | Penetration (%) | 85.43 | 76.77 | 82.61 | 79.83 | 79.34 | 86.64 |
| Mist degree (%) | 86.25 | 85.47 | 88.43 | 82.16 | 82.95 | 80.31 | |
| Diffusibleness | 2.43 | 1.54 | 1.77 | 3.37 | 2.79 | 3.93 | |
| Polystyrene 20％ | Penetration (%) | 85.57 | 84.56 | 83.62 | 84.13 | 85.58 | 86.42 |
| Mist degree (%) | 84.90 | 86.71 | 86.72 | 86.70 | 81.93 | 80.20 | |
| Diffusibleness | 2.58 | 4.25 | 2.43 | 2.92 | 1.92 | 2.01 | |
| Polystyrene 25％ | Penetration (%) | 95.36 | 94.59 | 94.71 | 94.21 | 93.91 | 93.94 |
| Mist degree (%) | 90.13 | 87.48 | 88.00 | 85.76 | 84.20 | 83.74 | |
| Diffusibleness | 4.8 | 2.7 | 2.73 | 2.33 | 2.13 | 2.58 |
Table 3-2
| EX7 | EX8 | EX9 | ||
| SiO 2 5％ | Penetration (%) | 92.22 | 91.72 | 91.53 |
| Mist degree (%) | 28.90 | 25.59 | 23.22 | |
| Diffusibleness | 1.66 | 2.61 | 1.68 | |
| SiO 2 10％ | Penetration (%) | 92.50 | 92.81 | 92.35 |
| Mist degree (%) | 41.47 | 44.51 | 40.49 | |
| Diffusibleness | 3.23 | 3.7 | 4.42 | |
| SiO 2 15％ | Penetration (%) | 93.09 | 93.23 | 92.12 |
| Mist degree (%) | 53.72 | 54.91 | 46.18 | |
| Diffusibleness | 5.48 | 5.13 | 4.88 |
| SiO 2 20％ | Penetration (%) | 94.22 | 93.95 | 94.53 |
| Mist degree (%) | 67.63 | 67.08 | 69.62 | |
| Diffusibleness | 8.38 | 8.59 | 7.11 | |
| SiO 2 25％ | Penetration (%) | 93.95 | 93.62 | 94.27 |
| Mist degree (%) | 68.81 | 63.92 | 68.28 | |
| Diffusibleness | 9.17 | 7.11 | 10.84 |
Table 3-3
| EX10 | EX11 | EX12 | ||
| PMMA 5％ | Penetration (%) | 90.21 | 87.90 | 89.58 |
| Mist degree (%) | 6.00 | 12.92 | 9.77 | |
| Diffusibleness | 0 | 0 | 0 | |
| PMMA 10％ | Penetration (%) | 89.22 | 89.16 | 89.18 |
| Mist degree (%) | 12.07 | 17.85 | 18.04 | |
| Diffusibleness | 0 | 0.56 | 0 | |
| PMMA?15％ | Penetration (%) | 88.81 | 88.86 | 89.17 |
| Mist degree (%) | 18.27 | 26.41 | 18.08 | |
| Diffusibleness | 0 | 0 | 0 | |
| PMMA?20％ | Penetration (%) | 88.65 | 89.27 | 89.29 |
| Mist degree (%) | 17.85 | 16.66 | 22.46 | |
| Diffusibleness | 0 | 0.53 | 1.63 |
| PMMA 25％ | Penetration (%) | 88.74 | 89.09 | 89.46 |
| Mist degree (%) | 18.03 | 24.75 | 18.77 | |
| Diffusibleness | 0.47 | 0.39 | 0.45 |
Though the present invention discloses as above with a plurality of preferred embodiments; right its is not in order to limit the present invention; those of ordinary skill in the technical field under any; without departing from the spirit and scope of the present invention; when can changing arbitrarily and retouching, so protection scope of the present invention is as the criterion when looking the accompanying Claim book person of defining.
Claims (11)
1. optical diffusion film comprises: a hardening resin by two six cyclic group acrylic monomerss and the crosslinked sclerosis of an ammonia ester acrylic monomers form, a smooth diffusion particle and a rigidizer.
2. optical diffusion film according to claim 1, the structure of wherein said two six cyclic group acrylic monomerss are suc as formula (I):
Formula (I)
R wherein
1, R
2Independent separately is H or C1-C5 alkyl.
3. optical diffusion film according to claim 2, wherein said two six cyclic group acrylic monomerss are 2-decahydronaphthalene acrylate (2-DHA).
4. optical diffusion film according to claim 1, the structure of wherein said ammonia ester acrylic monomers are suc as formula (II):
Formula (II)
R wherein
1Be C1～C12 aliphatics or aromatic series; R
2Be C1～C4 straight chain aliphatics.
5. optical diffusion film according to claim 4, wherein said ammonia ester acrylic monomers is 1,6-hexa-methylene three isocyanide acrylate have structural formula (III):
Formula (III).
6. optical diffusion film according to claim 1, wherein said two six cyclic group acrylic monomerss and described ammonia ester acrylic monomers mixed weight ratio are 5/95～50/50.
7. optical diffusion film according to claim 1, wherein said smooth diffusion particle are organic particle, inorganic fine particles or aforesaid combination.
8. optical diffusion film according to claim 1, wherein said smooth diffusion particle are polystyrene, polymethylmethacrylate, methyl methacrylate and styrene copolymerized compound, polycarbonate, tygon, silicon resin, lime carbonate, silicon dioxide, titania or aforesaid combination.
9. optical diffusion film according to claim 1, the size distribution of wherein said smooth diffusion particle are 3 μ m～25 μ m.
10. optical diffusion film according to claim 1, wherein said smooth diffusion particle and described hardening resin mixed weight ratio are 1/99～50/50.
11. optical diffusion film according to claim 1, wherein said rigidizer part by weight accounts for 1～7% of described hardening resin.
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| CN102925036B (en) * | 2012-11-01 | 2015-07-08 | 昆山乐凯锦富光电科技有限公司 | Coating composition and optical diffusion film |
| CN105572774A (en) * | 2014-10-13 | 2016-05-11 | 鸿富锦精密工业（深圳）有限公司 | Diffusion film, preparation method thereof, backlight module, display device and electronic device |
| CN107831560A (en) * | 2017-11-30 | 2018-03-23 | 宁波激智科技股份有限公司 | A kind of Pasting type optical diffusion and preparation method thereof |
| CN114114498B (en) * | 2020-08-31 | 2023-06-02 | 宁波激智科技股份有限公司 | Polarization-preserving optical film and polarization-preserving diffusion film |
| CN114114499B (en) * | 2020-08-31 | 2024-07-19 | 宁波激智科技股份有限公司 | Polarization-maintaining optical film, polarization-maintaining diffusion film and double-sided fog polarization-maintaining diffusion film |
| CN112433279B (en) * | 2020-12-04 | 2023-03-14 | 宁波东旭成新材料科技有限公司 | Preparation method of light diffusion film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003215325A (en) * | 2002-01-25 | 2003-07-30 | Kureha Chem Ind Co Ltd | Optical material |
| JP2006126822A (en) * | 2004-09-30 | 2006-05-18 | Dainippon Ink & Chem Inc | Light diffusion film |
| CN101116013A (en) * | 2005-03-30 | 2008-01-30 | 大日本油墨化学工业株式会社 | Light diffusion film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003215325A (en) * | 2002-01-25 | 2003-07-30 | Kureha Chem Ind Co Ltd | Optical material |
| JP2006126822A (en) * | 2004-09-30 | 2006-05-18 | Dainippon Ink & Chem Inc | Light diffusion film |
| CN101116013A (en) * | 2005-03-30 | 2008-01-30 | 大日本油墨化学工业株式会社 | Light diffusion film |
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