CN102778712B - Optical diffusion barrier - Google Patents
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Abstract
The invention relates to an optical diffusion barrier which comprises a substrate, a diffusion layer and a back layer, wherein the diffusion layer is ultraviolet-cured on any one of the surfaces of the substrate by coating solution comprising optical diffusion particles A, resin A and photo-initiator, wherein the resin A consists of epoxy acrylate resin and urethane acrylate with 8 degrees of functionality in the weight ratio of 1:9-9:1; the back layer is ultraviolet-cured on the other surface of the substrate by coating solution comprising optical diffusion particles B, resin B, photo-initiator and antistatic agent, wherein the resin B consists of pentaerythritol triacrylate and caprolactone modified dipentaerythritol penta/hexa-acrylate in the weight ratio of 1:9-9:1; the optical diffusion particles A consist of high polymer micro-spheres in particle sizes of 10-25 microns and inorganic particles in the particle sizes of 1-4 microns, in the weight ratio of 2:1-4:1; the optical diffusion particles B are inorganic particles in the particle sizes of 2-4 microns; and the diffusion barrier has high hardness, thin coating layer and high transmittance, full diffusion performance and good antistatic property and can meet the development direction of a flat panel display in large size, thinning, light weight and low cost.
Description
Technical field
The present invention relates to a kind of optical diffusion for LCDs.
Background technology
All the time, flat-panel monitor is widely used in TV, computer monitor, notebook computer, mobile phone, digital camera, palm PC, GPS navigator etc.The picture light source of these liquid crystal display provided by backlight module wherein, is even, high brightness to the requirement of light source.
The effect of optical diffusion is, by refraction effect, the light of pointolite or line source is evenly diffused into area source that is homogeneous, high brightness.This optical diffusion is widely used in the backlight module of liquid crystal display or plasma display.
The typical structure of flat panel display backlight die set is: light is emitted by light source, through reflectance coating, light guide plate and reflector plate, carry out diffuseing to form area source through optical diffusion again, optical diffusion is generally configured between light guide plate and brightness enhancement film, and the light penetrated by light guide plate in order to diffusion also reuses brightness enhancement film part reflected light.
Flat-panel monitor is except except large scale development, also wish can take into account slimming, lightweight and the requirement such as reduce costs simultaneously, and the diffusion barrier in existing backlight module is main mainly with heat curing mode, adopt the diffusion barrier obtained in this way and there is the low shortcoming of hardness, in order to obtain certain hardness and ensure its diffusivity simultaneously, the thickness of coating must be improved, so namely add the cost of backlight module, again reduce transmittance, reduce sharpness and the colour vividness of display; In addition, the production cycle of heat curing mode is long, is unfavorable for enhancing productivity.
In addition, in existing optical diffusion, the lower surface of the backing layer scratch-resistant layer of diffusion barrier is smooth surface, and this easily causes and to produce displacement between diffusion barrier and light guide plate or stick together, and diffusion barrier in use exists the phenomenons such as Electrostatic Absorption contaminating impurity.
Summary of the invention
The technical problem to be solved in the present invention is: in view of the foregoing defects the prior art has, provides a kind of optical diffusion, and this optical diffusion has high rigidity, coating is thin, transmitance is high; There is sufficient diffusion and good antistatic behaviour.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of optical diffusion, comprise base material, diffusion layer and backing layer, it is characterized in that, described diffusion layer is by the arbitrary surface of the coating fluid ultra-violet curing containing optics diffusion particle A, Resin A and light trigger at base material, described Resin A is made up of epoxy acrylic resin and 8 functionality urethane acrylates, and its weight ratio is: 1:9 ~ 9:1; Described backing layer is by another surface at base material of the coating fluid ultra-violet curing containing optics diffusion particle B, resin B, light trigger and antistatic agent, described resin B is made up of pentaerythritol triacrylate and caprolactone modification bipentaerythrite five/six acrylate, and its mass ratio is 1:9 ~ 9:1; By particle diameter, to be the superpolymer microballon of 10 ~ 25 μm and particle diameter be described optics diffusion particle A that the inorganic particulate of 1 ~ 4 μm forms, and its weight ratio is 12:1 ~ 4:1; Described optics diffusion grain B to be particle diameter the be inorganic particulate of 2 ~ 4 μm.
In above-mentioned diffusion barrier, described superpolymer microballon is for being polystyrene, polymethylmethacrylate, methyl methacrylate and styrene copolymerized compound, polycarbonate, tygon, silicones.
In above-mentioned diffusion barrier, described inorganic particulate is calcium carbonate, silicon dioxide, titania.
In above-mentioned diffusion barrier, described initiating agent is 1-hydroxy phenyl cyclohexanone and 2-(2,4,6-trimethylbenzoyl)-phenylphosphine oxide.
In above-mentioned diffusion barrier, described thickness of diffusion layer is 8 ~ 14 μm, and backing layer thickness is 1 ~ 3 μm.
In above-mentioned diffusion barrier, described antistatic agent is nanometer grade indium tin oxide.
Base material in the present invention requires from operating characteristic, the material with excellent surface flatness, physical strength, temperature tolerance and weatherability can be used as the base material of optical diffusion, as polyolefin, polystyrene, Polyvinylchloride, polycarbonate, polyamide, polyimide, polyester (polyethylene terephthalate, poly-how naphthalate etc.), polyacrylate, polymethacrylate, polyesteramide etc.The thickness of base material needs to choose according to processing characteristics, as resistance to thermal dimensional stability, transmitance etc., generally chooses 20 ~ 300 μm.If the thickness of base material is excessively thin, so its heat-resistant stability declines, and affects the manufacturing of optical diffusion, equipped processing and heat-resisting operating characteristic.If the thickness of base material is blocked up, so its transmitance reduces, and certainly will affect the optical indexes such as the transmitance of optical diffusion and mist degree.For improving the wetting and spreading characteristic of substrate surface and coating fluid, improve the adherence of substrate surface and coating layer, base material can pass through surface treatment, as corona treatment, Cement Composite Treated by Plasma, also bottoming process can be carried out to its surface, as coating improves the resin of adherence.
Diffusion layer in the present invention is by the arbitrary surface of the coating fluid ultra-violet curing containing optics diffusion particle A, Resin A and light trigger at base material.
The optics diffusion particle A used in diffusion layer is spherical or non-spherical microballon, or be both composition, optics diffusion particle A is made up of superpolymer microballon and inorganic particulate, superpolymer microballon generally can use the microballon of following material: polystyrene, polyacrylate, polymethylmethacrylate, methyl methacrylate and styrene copolymerized compound, polycarbonate, tygon, silicones, hydroxyethyl methylacrylate, hydroxy propyl methacrylate, acrylamide, polysiloxane etc., preferred polystyrene, polymethylmethacrylate, methyl methacrylate and styrene copolymerized compound, polycarbonate, tygon, silicones, inorganic particulate is calcium carbonate, silicon dioxide, titania.Just because of the structure of high-crosslinking-degree, above-mentioned microballon is made to have very strong thermotolerance and solvent resistance, and above-mentioned polymer microbeads can maintain the high transparent of material itself in diffusion barrier, meet the optical requirement such as the necessary transmitance of optical diffusion and mist degree, due to the hollow structure that inorganic particulate is special, not only there is high transparent in the coating but also the round of light can be changed, thus possessed the optical requirement such as high permeability and mist degree harmony, in addition, the concavo-convex of purpose can also be obtained by oarse-grained polymer microbeads and the used in combination of short grained inorganic particulate, make diffusion barrier exquisite in texture, reach sufficient diffusion effect.The particle diameter of superpolymer microballon is 10 ~ 25 μm, and the particle diameter of inorganic particulate is 1 ~ 4 μm, and its weight ratio is 12:1 ~ 4:1, because when superpolymer microballon and inorganic particle ratio are greater than 12:1, can make diffusion barrier rough surface, texture is fineless and smooth, and mist degree reduces; When the ratio of superpolymer microballon and inorganic particle is less than 4:1, a large amount of inorganic particle can be made to be buried in coating, reduce the transmittance of diffusion barrier.
Resin A in diffusion layer chooses ultra-violet curing high functionality resin.High functionality resin can be: epoxy acrylate, tetramethylol methane tetraacrylate, bipentaerythrite five/six acrylate, pentaerythritol triacrylate, polyfunctionality urethane acrylate, may also be ethoxy, methoxyl or caprolactone graft modification and there is the acrylic monomers of more than three-functionality-degree, this resinoid reduces coating weight, also hardness and the mist degree of coating can be kept, and light penetration is high, the briliancy of diffusion barrier can be increased, Resin A in the present invention is made up of epoxy acrylic resin (EA) and 8 functionality urethane acrylates (PUA), its weight ratio is: 1:9 ~ 9:1, to ensure that coating hardness can reach more than 3H, in addition, because diffusion barrier is formed in photocuring mode, shorten the time of diffusion material solidification, improve production efficiency, and the object making large scale diffusion barrier can be reached.
The light trigger used in diffusion layer can adopt the known light trigger in ultra-violet curing field; can be generally 1-hydroxy-cyclohexyl-phenyl ketone (184), 2-(2; 4; 6-trimethylbenzoyl)-phenylphosphine oxide (850), 2-hydroxy-2-methyl-1-phenyl-1-acetone (1173) etc.; can choose according to the requirement of coating hardness and the transparency; 184 are applicable to top layer curing system; 850 are applicable to deep cure system, so carry out the composite solidification effect that can reach the best both selecting in the present invention.
For the consideration preventing slip or adhesion aspect between diffusion barrier and light guide plate, optical diffusion of the present invention is provided with backing layer.Described backing layer is by another surface at base material of the coating fluid ultra-violet curing containing optics diffusion particle B, resin B, light trigger and antistatic agent.With diffusion layer unlike to be particle diameter the be inorganic particulate of 2 ~ 4 μm of the optics diffusion particle B in backing layer; Resin B is made up of pentaerythritol triacrylate (PETA) and caprolactone modification bipentaerythrite five/six acrylate (DPHA), and its mass ratio is 1:9 ~ 9:1, to ensure that coating hardness can reach more than 2H.In addition, in order to improve the antistatic behaviour of optical diffusion, meet the antistatic requirement in optical diffusion production and application, nano inorganic metal oxide antistatic agent is used in backing layer of the present invention, for the requirement of backing layer thickness property and diffusion barrier transmittance, preferred nanometer grade indium tin oxide is as antistatic agent.Nanometer grade indium tin oxide antistatic agent, can modulate the surface resistance of coating face within the specific limits, and makes coating face have good hardness.
When selecting coating thickness, need the particle diameter considering emphatically optics diffusion particle in coating.If coating thickness is little compared with the mean grain size of optics diffusion particle many, coating bulky grain easily comes off, and this is that then area relative grain size surface area is less caused due to resin; If coating thickness is many greatly compared with the mean grain size of optics diffusion particle, there is incoordination in the mist degree index of coating.In the present invention, for ensureing that rete has good hardness, the harmony of transmitance and mist degree is good, and main diffusion layer thickness is 8 ~ 14 μm, and backing layer thickness is 1 ~ 3 μm.
By implementing technical scheme provided by the invention, the diffusion barrier obtained has high rigidity, coating is thin, transmitance is high; There is sufficient diffusion and good antistatic behaviour, flat-panel monitor large scale, slimming, lightweight, developing direction that cost is low can be met.
Embodiment
Below in conjunction with specific embodiment, the present invention is specifically described, but the present invention is not limited to this.
Embodiment 1
The preparation of diffusion layer coating fluid:
EA 5 parts
8 functionality PUA 45 parts
184 1.2 parts
850 1.2 parts
BYK307 0.25 part
Butanone 100 parts
Toluene 200 parts
PMMA microballon (14 μm) 161.5 parts
Silicon dioxide (A-380) (2 μm) 13.5 parts
The preparation of backing layer coating fluid:
PETA 5 parts
Caprolactone modification DPHA 45 parts
184 1.2 parts
850 1.2 parts
BYK307 0.20 part
Butanone 250 parts
Isopropyl alcohol 100 parts
Silicon dioxide (A-380, Degussa) (3 μm) 9 parts
Antistatic agent (Adnano ITO, Degussa) 0.2 part
High for above-mentioned material stirring is uniformly dispersed, obtained diffusion layer applying material is applied to polyethylene terephthalate thin film (the Chinese Lekai Film Group Co's manufacture as base material, trade name: FG22-188) a face on, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the front of diffusion barrier, the thickness of coating is 10 microns; Obtained backsize material is applied on another face of base material, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the back side of diffusion barrier, the thickness of coating is 1.8 microns, obtains diffusion barrier.The assessment result of the diffusion barrier obtained is listed in table 1.
Embodiment 2
The preparation of diffusion layer coating fluid:
EA 45 parts
8 functionality PUA 5 parts
184 1.2 parts
850 1.2 parts
BYK307 0.25 part
Butanone 150 parts
Toluene 150 parts
Polystyrene microbeads (25 μm) 150 parts
Titania (4 μm) 25 parts
The preparation of backing layer coating fluid:
PETA 45 parts
Caprolactone modification DPHA 5 parts
184 1.2 parts
850 1.2 parts
BYK307 0.20 part
Butanone 200 parts
Toluene 150 parts
Titania (2 μm) 9 parts
Antistatic agent (Adnano ITO, Degussa) 0.2 part
High for above-mentioned material stirring is uniformly dispersed, obtained diffusion layer applying material is applied to polyethylene terephthalate thin film (the Chinese Lekai Film Group Co's manufacture as base material, trade name: FG22-188) a face on, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the front of diffusion barrier, the thickness of coating is 14 microns; Obtained backsize material is applied on another face of base material, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the back side of diffusion barrier, the thickness of coating is 1.0 microns, obtains diffusion barrier.The assessment result of the diffusion barrier obtained is listed in table 1.
Embodiment 3
The preparation of diffusion layer coating fluid:
EA 15 parts
8 functionality PUA 35 parts
184 1.0 parts
850 1.4 parts
BYK307 0.25 part
Butanone 100 parts
Isopropyl alcohol 50 parts
Toluene 150 parts
PMMA microballon (16 μm) 150 parts
Silicon dioxide (A-380, Degussa) (2 μm) 25 parts
The preparation of backing layer coating fluid:
PETA 15 parts
Caprolactone modification DPHA 35 parts
184 1.2 parts
850 1.2 parts
BYK307 0.20 part
Butanone 175 parts
Toluene 175 parts
9 parts, calcium carbonate (3 μm)
Antistatic agent (Adnano ITO, Degussa) 0.2 part
High for above-mentioned material stirring is uniformly dispersed, obtained diffusion layer applying material is applied to polyethylene terephthalate thin film (the Chinese Lekai Film Group Co's manufacture as base material, trade name: FG22-188) a face on, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the front of diffusion barrier, the thickness of coating is 11 microns; Obtained backsize material is applied on another face of base material, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the back side of diffusion barrier, the thickness of coating is 2.0 microns, obtains diffusion barrier.The assessment result of the diffusion barrier obtained is listed in table 1.
Embodiment 4
The preparation of diffusion layer coating fluid:
EA 35 parts
8 functionality PUA 15 parts
184 1.0 parts
850 1.4 parts
BYK377 0.25 part
Butanone 100 parts
Toluene 200 parts
Polycarbonate microballon (18 μm) 157.5 parts
17.5 parts, calcium carbonate (3 μm)
The preparation of backing layer coating fluid:
PETA 35 parts
Caprolactone modification DPHA 15 parts
184 1.2 parts
850 1.2 parts
BYK377 0.20 part
Butanone 175 parts
Methyl isobutyl ketone 80 parts
Toluene 95 parts
Silicon dioxide (A-380, Degussa) (3.5 μm) 9 parts
Antistatic agent (Adnano ITO, Degussa) 0.2 part
High for above-mentioned material stirring is uniformly dispersed, obtained diffusion layer applying material is applied to polyethylene terephthalate thin film (the Chinese Lekai Film Group Co's manufacture as base material, trade name: FG22-188) a face on, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the front of diffusion barrier, the thickness of coating is 13 microns; Obtained backsize material is applied on another face of base material, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the back side of diffusion barrier, the thickness of coating is 2.5 microns, obtains diffusion barrier.The assessment result of the diffusion barrier obtained is listed in table 1.
Embodiment 5
The preparation of diffusion layer coating fluid:
EA 25 parts
8 functionality PUA 25 parts
184 1.2 parts
850 1.2 parts
BYK307 0.25 part
Butanone 100 parts
Toluene 188 parts
PMMA and styrene copolymerized compound microballon (10 μm) 150 parts
Titania (1 μm) 37 parts
The preparation of backing layer coating fluid:
PETA 25 parts
Caprolactone modification DPHA 25 parts
184 1.2 parts
850 1.2 parts
BYK377 0.20 part
Butanone 175 parts
Isopropyl alcohol 55 parts
Toluene 120 parts
Silicon dioxide (A-380, Degussa) (4 μm) 11 parts
Antistatic agent (Adnano ITO, Degussa) 0.2 part
High for above-mentioned material stirring is uniformly dispersed, obtained diffusion layer applying material is applied to polyethylene terephthalate thin film (the Chinese Lekai Film Group Co's manufacture as base material, trade name: FG22-188) a face on, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the front of diffusion barrier, the thickness of coating is 8 microns; Obtained backsize material is applied on another face of base material, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the back side of diffusion barrier, the thickness of coating is 3.0 microns, obtains diffusion barrier.The assessment result of the diffusion barrier obtained is listed in table 1.
Comparative example 1
The preparation of diffusion layer coating fluid:
Polyacrylate resin binder (solid content 50%, hydroxyl value 50) 100 parts
Isocyanate crosslinking IPDI (NCO content 37%) 7.0 parts
BYK307 0.25 part
Butanone 50 parts
Toluene 200 parts
Acryl resin microballon (30 μm) 150 parts
Silicon dioxide (A-380) (5 μm) 25 parts
The preparation of backing layer coating fluid:
Polyacrylate resin binder (solid content 50%, hydroxyl value 50) 100 parts
Isocyanate crosslinking IPDI (NCO content 37%) 7.0 parts
BYK307 0.20 part
Butanone 150 parts
Toluene 150 parts
Silicon dioxide (A-380, Degussa) (5 μm) 9 parts
Antistatic agent (Adnano ITO, Degussa) 0.2 part
High for above-mentioned material stirring is uniformly dispersed, obtained diffusion layer applying material is applied to polyethylene terephthalate thin film (the Chinese Lekai Film Group Co's manufacture as base material, trade name: FG22-188) a face on, heated-air drying makes its build be 22 microns; Applied by obtained backsize material on another face of base material, heated-air drying makes its build be 2.0 microns, after completing coating, and with the heat aging process carrying out 48 hours under 40 DEG C of constant temperature, make optical diffusion, its assessment result is listed in table 1.
Comparative example 2
The preparation of diffusion layer coating fluid:
PUA(2 functionality) 50 parts
184 1.2 parts
850 1.2 parts
BYK377 0.25 part
Butanone 100 parts
Toluene 188 parts
Acryl resin microballon (15 μm) 150 parts
Silicon dioxide (A-380, Degussa) (3 μm) 37 parts
The preparation of backing layer coating fluid:
PUA(2 functionality) 50 parts
184 1.2 parts
850 1.2 parts
BYK307 0.20 part
Butanone 245 parts
Isopropyl alcohol 105 parts
Silicon dioxide (A-380, Degussa) (3 μm) 11 parts
High for above-mentioned material stirring is uniformly dispersed, obtained diffusion layer applying material is applied to polyethylene terephthalate thin film (the Chinese Lekai Film Group Co's manufacture as base material, trade name: FG22-188) a face on, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the front of diffusion barrier, the thickness of coating is 10 microns; Obtained backsize material is applied on another face of base material, after 90 DEG C to the dry 2.0min of the coating formed, with 700mj/cm
2light quantity, be cured by the coating of Ultraviolet radiation to drying and form the back side of diffusion barrier, the thickness of coating is 2.5 microns.The assessment result of the diffusion barrier obtained is listed in table 1.
Table 1 performance data table
The method of testing of product properties is as follows:
(1) transmittance, mist degree test
Haze meter is utilized [to be manufactured by Hitachi, Ltd; Model: " U3000 "], measure total transmittance (Tt) and mist degree (H).
(2) pencil hardness test
According to the method for standard GB/T6739-1996, the hardness of film tester of being swiped by pencil is utilized [to be manufactured by Shanghai Pu Shen chemical machinery company limited; Model: BY] measure pencil hardness.
(3) resistance to deciduous evaluation
By damage resistant tester sheen705, under adopting the condition of 20gf load, 40mm/s, reciprocal 50 friction optics diffusion coating faces.Optical diffusion coating after friction is cut 10mm × 10mm sample, and carry out microballon with optical microscope and to come off observation, evaluation criterion is as follows:
0: do not observe the place that comes off; Y: the place that comes off is for 1-3; X: the place that comes off is more than 4.
(4) thickness measuring
The thickness of optical diffusion is measured by CH-1-S hand formula thousand points of thicknessmeters of Shanghai six water chestnut instrument plant.
(5) surface resistance test
By surface resistance tester ACL-385, measure the surface resistance of optical diffusion.
As can be seen from Table 1, adopt technical scheme of the present invention, while ensureing that coating has high rigidity (coating hardness of diffusion layer reach more than 3H, the coating hardness of backing layer reach more than 2H), the lower thickness of coating; Under the diffusible prerequisite of guarantee, transmittance improves more than 12%, mist degree>=93%, achieves the good coordination of transmittance and mist degree; Surface resistivity≤10
10Ω/, shows good antistatic behaviour.
Claims (5)
1. an optical diffusion, comprise base material, diffusion layer and backing layer, it is characterized in that, described diffusion layer is by the arbitrary surface of the coating fluid ultra-violet curing containing optics diffusion particle A, Resin A and light trigger at base material, described Resin A is made up of epoxy acrylic resin and 8 functionality urethane acrylates, and its weight ratio is: 1:9 ~ 9:1; Described backing layer is by another surface at base material of the coating fluid ultra-violet curing containing optics diffusion particle B, resin B, light trigger and antistatic agent, described resin B is made up of pentaerythritol triacrylate and caprolactone modification bipentaerythrite five/six acrylate, and its mass ratio is 1:9 ~ 9:1; By particle diameter, to be the superpolymer microballon of 10 ~ 25 μm and particle diameter be described optics diffusion particle A that the inorganic particulate of 1 ~ 4 μm forms, and its weight ratio is 12:1 ~ 4:1; Described optics diffusion particle B to be particle diameter the be inorganic particulate of 2 ~ 4 μm;
Described thickness of diffusion layer is 8 ~ 14 μm, and backing layer thickness is 1 ~ 3 μm.
2. diffusion barrier according to claim 1, is characterized in that, described superpolymer microballon is polystyrene, polymethylmethacrylate, methyl methacrylate and styrene copolymerized compound, polycarbonate, tygon, silicones.
3. diffusion barrier according to claim 2, is characterized in that, described inorganic particulate is calcium carbonate, silicon dioxide, titania.
4. diffusion barrier according to claim 3, is characterized in that, described initiating agent is 1-hydroxy phenyl cyclohexanone and 2-(2,4,6-trimethylbenzoyl)-phenylphosphine oxide.
5. diffusion barrier according to claim 4, is characterized in that, described antistatic agent is nanometer grade indium tin oxide.
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| CN1825140A (en) * | 2005-02-23 | 2006-08-30 | 第一毛织株式会社 | Brightness-enhanced multilayer optical film with low reflectivity for display and organic light emitting diode display using the same |
| CN101074996A (en) * | 2006-05-16 | 2007-11-21 | 日东电工株式会社 | Hard-coated antiglare film, polarizing plate, and image display |
| CN101603664A (en) * | 2009-06-23 | 2009-12-16 | 中国乐凯胶片集团公司 | A kind of optical diffusion |
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| CN102778712A (en) | 2012-11-14 |
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