KR101978876B1 - Polarizing plate comprising optical film and display device using the same - Google Patents
Polarizing plate comprising optical film and display device using the same Download PDFInfo
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- KR101978876B1 KR101978876B1 KR1020170040626A KR20170040626A KR101978876B1 KR 101978876 B1 KR101978876 B1 KR 101978876B1 KR 1020170040626 A KR1020170040626 A KR 1020170040626A KR 20170040626 A KR20170040626 A KR 20170040626A KR 101978876 B1 KR101978876 B1 KR 101978876B1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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Abstract
The polarizing plate according to the present invention comprises a polarizer; A substrate on the polarizer; And a surface treatment film provided on at least one surface of the substrate and satisfying the formula (1).
The polarizing plate of the present invention has the effect of suppressing the occurrence of Newton ring mura.
Description
The present invention relates to a polarizing plate and an image display device including an optical film.
Generally, a polarizing plate used in an image display apparatus such as a liquid crystal display (LCD), a plasma display (PDP), a cathode ray tube (CRT) and an electroluminescence display (EL) generally has an iodine compound or a dichroic polarizing plate And a function coating film such as a hard coating layer, an antistatic coating layer, and a low reflection coating layer is laminated on the surface of the polarizing plate in order to impart various functions to the polarizing plate.
However, when a coating for forming such a functional optical coating film is performed, an interference effect similar to a rainbow color occurs due to interference between the reflected light on the surface of the functional coating layer and the interface reflected light between the base film and the functional coating layer. Particularly, when the refractive index of the base film and the refractive index of the functional coating layer are different from each other, this interference effect is strongly generated, and there is a problem that image deterioration occurs to a large extent.
Particularly, as public information display (PID) system is widely used for various purposes such as outdoor advertisement or electronic blackboard, visibility for clarification of information transmission is becoming the most important factor. In order to improve this, a panel having a relatively long width is manufactured as compared with the conventional panel. In addition, as the touch sensor is enlarged, the radius of curvature becomes larger during operation of the touch panel, .
Korean Unexamined Patent Publication No. 2003-0077976 discloses a Newton ring prevention sheet having a Newton ring prevention layer on at least one side of a transparent polymer film, wherein the Newton ring prevention layer is formed of at least a binder resin and particles , And the particles are monodisperse spherical particles having an average particle diameter of not less than 0.4 μm and not more than 2.0 μm and are mixed in a ratio of not less than 0.5 parts by weight and not more than 3 parts by weight based on 100 parts by weight of the binder resin Discloses a sheet for preventing a Newton ring.
However, in the above literature, since a coating layer having a separate optical characteristic must be formed, it is not excellent in terms of process as well as cost, and its effect is not sufficient for application to a PID system.
Therefore, there is a demand for the development of a polarizing plate including an optical film capable of suppressing the occurrence of Newton rings when applied to a PID system such as an outdoor advertisement or an electronic blackboard.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a polarizing plate comprising an optical film capable of suppressing the occurrence of Newton rings.
It is another object of the present invention to provide an image display apparatus in which no new-ring is generated.
According to an aspect of the present invention, there is provided a polarizer comprising: a polarizer; A substrate on the polarizer; And a surface treatment film provided on at least one side of the substrate and satisfying the following formula (1).
[Formula 1]
EIT x Rz > 10 x 10 < 3 > N / m
In Equation (1)
EIT is the compressive modulus (GPa) of the surface treated film,
Rz is the 10-point average roughness (탆).
The present invention also provides an image display device including the above-mentioned polarizing plate.
The polarizing plate of the present invention has an advantage that the occurrence of Newton rings can be suppressed.
Further, the image display apparatus including the polarizing plate of the present invention has an advantage that no new ring is generated.
1 is a diagram illustrating a Newton ring Mura generated when a load is loaded.
Figures 2A and 2B are diagrams illustrating an optical film capable of suppressing Newton ring Mura under load loading in accordance with some embodiments of the present invention.
Hereinafter, the present invention will be described in more detail.
When a member is referred to as being " on " another member in the present invention, this includes not only when a member is in contact with another member but also when another member exists between the two members.
Whenever a part is referred to as " including " an element in the present invention, it is to be understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.
<Polarizing plate containing optical film>
An aspect of the present invention relates to a polarizer comprising: a polarizer; A substrate on the polarizer; And a surface-treated film provided on at least one side of the substrate and satisfying the following formula (1).
[Formula 1]
EIT x Rz > 10 x 10 < 3 > N / m
In Equation (1)
EIT is the compressive modulus (GPa) of the surface treated film,
Rz is the 10-point average roughness (탆).
The polarizing plate according to the present invention includes a surface treatment film satisfying the following formula (1). Specifically, the polarizing plate according to the present invention includes an optical film including a surface treatment film satisfying the following formula (1).
[Formula 1]
EIT x Rz > 10 x 10 < 3 > N / m
In Equation (1)
EIT is the compressive modulus (GPa) of the surface treated film,
Rz is the 10-point average roughness (탆).
The 10-point average roughness can be measured using a 3D microscope. Since it is usually difficult to objectively compare the curves themselves, various roughness indices can be calculated from the profile curve data. In the present invention, the 10-point average roughness (Rz) is calculated using the measurement results. Specifically, the 10-point average roughness refers to an average of the values of the upper five deviations from the maximum value of the deviations obtained from the average value of the profile curve data and a mean value of the absolute values of the values of the lower five deviations from the minimum value Can be expressed as the sum of the values of the averages.
In one embodiment of the present invention, EIT x Rz in Equation (1) may be 15 x 10 3 N / m or more.
The surface-treated film included in the polarizing plate according to the present invention satisfies the above-mentioned formula (1) and preferably satisfies EIT x Rz? 15 x 10 3 N / m, When the film is loaded, there is an advantage that the distortion of the glass curvature can be minimized by suppressing the surface roughness of the surface of the film and the flexural modulus of the base material, thereby suppressing the Newton ring.
The surface-treated film may have surface irregularities. Specifically, the surface-treated film may be formed by coating a solvent on at least one surface of the surface-treated film, and then roughening the surface-treated film by drying. In this case, the suppression of the Newton ring can be maximized.
The surface-treated film may be any plastic film having transparency, and may be appropriately selected depending on the use of the surface-treated film. For example, cycloolefin-based derivatives having units of monomers including cycloolefins such as norbornene and polycyclic norbornene monomers, cellulose (such as diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, isobutyl ester cellulose, propionyl cellulose , Butyryl cellulose and acetyl propionyl cellulose), ethylene vinyl acetate copolymer, polyester, polystyrene, polyamide, polyetherimide, polyacrylic, polyimide, polyethersulfone, polysulfone, polyethylene, , Polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate , Paul Carbonate, it is possible to use one selected from polyurethane and epoxy, it can be used an undrawn, uniaxially or biaxially stretched film.
Among the resins exemplified above, uniaxial or biaxially oriented polyester films excellent in transparency and heat resistance, cycloolefin-based derivative films excellent in transparency and heat resistance and capable of coping with the enlargement of the film, or transparency and optical anisotropy Triacetylcellulose film may be suitable.
In still another embodiment of the present invention, the surface-treated film is a single layer or two or more composite layers selected from the group consisting of a hard coating layer, an antistatic hard coating layer, an antiglare coating layer, an antistatic antiglare coating layer and a low- .
Specifically, the surface-treated film may serve as a hard coating layer, an antistatic hard coating layer, an anti-glare coating layer, an antistatic anti-glare coating layer or a low reflection coating layer. And the like are commonly used in the art and are not particularly limited and can be used.
For example, the hard coating layer may be formed using a hard coating liquid composition comprising 10 to 60 wt% of a polyfunctional (meth) acrylate, 1 to 10 wt% of a photopolymerization initiator, and 30 to 80 wt% of an organic solvent as an ultraviolet ray curable resin composition can do. Here, the (meth) acrylate means both acrylate and methacrylate.
The polyfunctional (meth) acrylate is specifically exemplified by dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra Acrylate, trimethylolpropane tri (meth) acrylate, glycerol tri (meth) acrylate, tris (2-hydroxyethylhydroxyethyl) isocyanurate tri (meth) acrylate, ethylene glycol di (Meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, , Neopentyl glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) Acrylates such as bis (2-hydroxyethyl) isocyanurate di (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (Meth) acrylate, stearyl (meth) acrylate, tetrapurfuryl (meth) acrylate and phenoxyethyl (meth) acrylate, or a mixture of two or more thereof .
Specific examples of the photopolymerization initiator include diphenyl ketone benzyl dimethyl ketal, acetophenone dimethyl ketal, p-dimethyl amine benzoate, 2-hydroxy-2-methyl-1-phenyl-1-on, 4- Dimethoxyacetophenone, 4,4-dimethoxyacetophenone, dimethoxy-2-phenylacetophenone, anthraquinone, 2-aminoanthraquinone, fluorene, triphenylamine, carbazole, benzophenone, Phenol, 4,4-diaminobenzophenone, benzoin and 2-ethylthioxanthone, or a mixture of two or more thereof.
The organic solvent is used for controlling the thickness of the hard coating layer and maintaining a good coating property. Any organic solvent which does not cause compatibility with the polyfunctional (meth) acrylate can be used. Specific examples of the solvent include methanol, ethanol, isopropanol, propanol, butanol, isobutanol, ethylcellosolve, methylcellosolve, butyl acetate, dimethylformamide, diacetone alcohol, ethylene glycol isopropyl alcohol, propylene glycol isopropyl alcohol, Ethyl ketone and N-methyl pyrrolidone, or a mixture of two or more thereof.
Inorganic hybrid type nanosilica particles in which the hydroxyl group on the surface of the silica is substituted with acrylate in order to improve the surface strength of the surface-treated film; A photopolymerization initiator such as triethylamine, diethylamine, methyldiethanolamine, ethanolamine, 4-dimethylamino-benzoic acid and isoamyl-4-dimethylaminobenzoate for improving photopolymerization efficiency; And additives such as fillers, leveling agents, antifoaming agents, ultraviolet absorbers, antioxidants, and the like.
The antistatic hard coating layer is formed by adding a conductive material to the hard coating liquid composition or using an antistatic hard coating liquid composition in which a part of the conductive material is replaced with a conductive material. The conductive material is generally used in the art and is not particularly limited, and specifically, a cationic surfactant such as a quaternary ammonium salt, phosphonium salt, or sulfonium salt; Anionic surfactants such as carboxylic acid type, sulfonate type, sulfuric acid type, phosphate type, and phosphite type; Cationic surfactants such as sulfobetaine, alkylbetaine, and alkylimidazoliumbetaine; And nonionic surfactants such as polyhydric alcohol derivatives, sorbitan fatty acid monoester diesters, polyalkylene oxide derivatives, and the like, but the present invention is not limited thereto.
In addition, a homopolymer of a monomer having a cationic system such as a quaternary ammonium salt or a cationic system such as a betaine compound, an anionic system such as a sulfonic acid salt or a sulfonic acid salt, or a nonionic system ionic conductive group such as glycerin, or other monomer capable of copolymerizing with the above- A polymer having an ionic conductivity such as a copolymer having a repeating unit derived from an acrylate or methacrylate having a quaternary ammonium salt group; A permanent antistatic agent obtained by mixing a hydrophilic polymer such as polyethylene methacrylate and an acrylic resin; Tin oxide, tin oxide, tin-coated titanic acid compound, nickel flake, indoped tin oxide, antimony doped tin oxide, antimony oxide, indium tin oxide, cerium oxide, aluminum oxide, diatomaceous earth Conductive fillers such as titanium and zirconium oxide; Inorganic hybrid type nano-metal oxide particles by replacing the hydroxyl group on the surface of the metal oxide particles with acrylate; And conductive polymers such as polypyrrole, polythiophene, and polyaniline, or a mixture of the two. It is preferable to use a metal compound of antimony-doped tin oxide particles.
The antiglare coating layer or antistatic antiglare coating layer may be formed using an antiglare coating composition or antistatic antiglare coating composition in which microparticles for imparting antifogging properties are dispersed in the hard coating composition or antistatic hard coating composition .
The microparticles for imparting the above-mentioned antiglare property are generally used in the art and are not particularly limited. In general, inorganic particles such as silica or polymer particles such as polymethylmethacrylate (PMMA) can be used. Such particles may be monodisperse particles, polydisperse particles or monodisperse and polydisperse particles having a size of 1 to 20 mu m in consideration of improvement in dispersibility.
The surface treatment film may have a thickness of 0.1 to 200 탆, preferably 1 to 50 탆, more preferably 1 to 20 탆, but is not limited thereto. However, within the above-mentioned range, there is an advantage that it is easy to apply to a large-area image display apparatus because of its excellent strength and easy handling.
As long as the surface-treated film satisfies the above-mentioned formula (1), commercially available products may be used, and they may be directly produced. For example, it may be formed using a die coater, an air knife, a reverse roll, a blade, a casting, a gravure, or the like, or the formed or purchased surface treatment film may be roughened.
The optical film according to the present invention includes a substrate. In still another embodiment of the present invention, the substrate may be an optical transparent substrate.
For example, the substrate may be any plastic film having transparency. Specific examples of the cycloolefin-based derivative having a monomer unit including a cycloolefin such as a norbornene-based or polycyclic norbornene-based monomer include diacetylcellulose, triacetylcellulose, acetylcellulosebutylate, isobutylestercellulose, ethylene-acetic acid Cellulose-based polymers such as vinylcellulose copolymer, propionylcellulose, butyrylcellulose and acetylpropionylcellulose; Or polyolefins such as polycycloolefin, polyester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyethersulfone, polysulfone, polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl A thermoplastic polymer such as an alcohol, a polyvinyl acetal, a polyether ketone, a polyether ether ketone, a polyether sulfone, a polymethyl methacrylate, a polyethylene terephthalate, a polycarbonate, a polybutylene terephthalate, a polyethylene naphthalate, a polyurethane and an epoxy , Or a mixture of two kinds of them may be used. These may be unoriented, uniaxial or biaxially oriented films. A monoaxially or biaxially stretched polyester film preferably having transparency and heat resistance, a polymethylmethacrylate film, a polycycloolefin-based film, a film made of triacetylcellulose or isobutylester cellulose in terms of transparency and optical anisotropy Film or the like is preferably used.
The substrate may have a thickness of, for example, 5 to 1000 탆, preferably 10 to 500 탆, more preferably 15 to 80 탆. In this case, the substrate is advantageous in workability and transparency.
In general, to increase visibility, the PDI is made of a panel with a longer length such as 5: 2 than conventional panels of 4: 3 or 16: 9, and the touch sensor is also enlarged. As a result, the radius of curvature becomes larger when the touch panel is operated, so that a Newton ring is easily generated. When a convex lens having a large radius of curvature is placed on a glass plate, a thin air layer is formed between the curved surface of the lens and the glass surface. When a light beam is vertically incident on the lens, the light reflected from the spherical surface of the lens and the reflection Means that a light interferes with each other and a round interference fringe appears when viewed from above. This is a factor for lowering the visibility of an optical film, an image display device including the optical film, and the like (see FIG. 1).
Generally, in the case of an image display device for use in a PID system, the length of the horizontal portion is designed to have a relatively longer length than the vertical length. In this case, the load of the glass itself is concentrated in the central portion, There was a problem that Newton Ring Mura easily occurred (see Fig. 2a).
Since the polarizing plate according to the present invention includes the surface treatment film satisfying the formula 1, there is an advantage that the generation of the interference effect, which is generally likely to occur in the surface treatment film and the polarizing plate including the same, is suppressed and excellent visibility is obtained ). Therefore, it can exhibit excellent performance when applied to a PID, particularly an image display device for outdoor display.
The polarizing plate according to the present invention includes a polarizer and the optical film described above, and may further include a known film other than the optical film.
Specifically, the polarizing plate may be a multilayer film in which one polarizer and a transparent protective film are laminated on at least one side thereof, and may further include a known optical functional film if the optical film is included. For example, the polarizing plate may further include, but not limited to, an optical compensation film, a reflection type polarization separation film, a retardation film, an antiglare function film, an additional film treated with a surface reflection device, a reflection film, and a transflective film.
However, the optical film is provided at the outermost portion of the polarizing plate, and in this case, the substrate of the optical film is provided so as to be in contact with another constitution of the polarizing plate. That is, the surface treatment film of the optical film is provided at the outermost part of the polarizing plate.
The polarizing plate may have a composition and composition commonly used in the art, and the polarizing plate and the polarizing plate included in the polarizing plate are not limited in the present invention.
For example, the polarizer is one in which a dichroic dye is adsorbed and oriented on an oriented polymer film, and the type of the polymer film constituting the polarizer is not particularly limited as long as it is a film that can be dyed with a dichroic material, such as iodine. A hydrophilic polymer film such as an alcohol-based film, an ethylene-vinyl acetate copolymer film, an ethylene-vinyl alcohol copolymer film, a cellulose film, and partially saponified films thereof; Or a dehydrated polyvinyl alcohol film, a dehydrochloric acid-treated polyvinyl alcohol film, and the like. Of these, a polyvinyl alcohol-based film is preferable because it has an excellent effect of enhancing the uniformity of the degree of polarization in the plane and is excellent in dye affinity for a dichroic substance.
The polarizer may further include a polarizer protective film on at least one side thereof, if necessary. As the usable protective film, a film superior in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy, etc. may be used. Specific examples include polyester resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate and polybutylene terephthalate; Cellulose-based resins such as diacetylcellulose and triacetylcellulose; Polycarbonate resin; Acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene resins such as polystyrene and acrylonitrile-styrene copolymer; Polyolefin resins such as polyethylene, polypropylene, cyclo- or norbornene-structured polyolefins, ethylene-propylene copolymers; Vinyl chloride resin; Amide resins such as nylon and aromatic polyamide; Imide resin; Polyether sulfone type resin; Sulfone based resin; Polyether ether ketone resin; A sulfided polyphenylene resin; Vinyl alcohol-based resin; Vinylidene chloride resins; Vinyl butyral resin; Allylate series resin; Polyoxymethylene type resin; Epoxy resin, and the like, and a film composed of the blend of the thermoplastic resin may also be used. Further, a film made of a thermosetting resin such as (meth) acrylic, urethane, acrylic urethane, epoxy, or silicone or a film made of an ultraviolet curable resin may be used.
The conventional optical compensation film may be grounded on the back surface of the polarizer, and then the adhesive may be grounded, but the present invention is not limited thereto.
The protective film may also function as a retardation film, but is not limited thereto.
The polarizing plate is applicable to various image display devices, and includes a polarizer; And a substrate on the polarizer; And a surface-treated film provided on at least one surface of the substrate and satisfying the following formula (1): " (1) "
[Formula 1]
EIT x Rz > 10 x 10 < 3 > N / m
In Equation (1)
EIT is the compressive modulus (GPa) of the surface treated film,
Rz is the 10-point average roughness (mu m) of the surface-treated film.
<Image Display Device>
Another aspect of the present invention relates to an image display apparatus including the above-mentioned polarizing plate.
In still another embodiment of the present invention, the image display apparatus may be a PID (public information display).
Specifically, the image display device may be an outdoor display.
Since the image display apparatus according to the present invention includes the polarizing plate including the optical film including the surface treatment film satisfying the formula 1, the distance between the irregularities of the surface treatment film and the glass provided on the surface treatment film, There is an advantage that the Newton ring mura does not occur by controlling the flexural modulus of the treated film and the like.
The image display device may include the polarizing plate, and may further include a glass substrate on the polarizing plate, and may further include a structure commonly used in the art.
Hereinafter, the present invention will be described in detail by way of examples to illustrate the present invention. However, the embodiments according to the present disclosure can be modified in various other forms, and the scope of the present specification is not construed as being limited to the above-described embodiments. Embodiments of the present disclosure are provided to more fully describe the present disclosure to those of ordinary skill in the art. In the following, "% " and " part " representing the content are by weight unless otherwise specified.
Example And Comparative Example
≪ Compressive modulus ( EIT ) ≫
The measurement of the compressive modulus (EIT) was carried out by measuring the compressive modulus when the surface treated film, that is, the antifogging coating film, was bonded and fixed to the glass and then the Vickers Indenter HM500 (manufactured by Fischer) And the pressing pressure was set to 500 mN.
<10 point average roughness ( Rz ) ≫
The 10-point average roughness (Rz) is measured by measuring the 10-point average roughness (Rz) of the surface-treated film using a 3D microscope (KEYENCE, VK9500). The 10-point average roughness (Rz) is calculated by taking the average of the values of the upper five deviations from the maximum value and the average value of the absolute values of the values of the lower five deviations from the minimum value Respectively.
Examples 1, 6 and 7
A surface treatment film of Dai Nippon Printing made by coating an antiglare layer on a substrate made of an acrylic resin (Sumitomo Chemical, TECHNOLLOY ™ film, 60 μm) was coated with a UV adhesive on one surface of a polarizer (Kuressa, VF-PE # 4500) To thereby obtain a polarizing plate. At this time, Rz and EIT of each surface-treated film are shown in Table 1 below.
Examples 2, 3 and 4
A polarizing plate was produced in the same manner as in Example 1 except that a substrate made of a cellulose resin (TJ25UL, manufactured by Fuji Film Co., Ltd.) was used in place of the acrylic resin. At this time, Rz and EIT of each surface-treated film are shown in Table 1 below.
Example 5 and 8
A polarizing plate was produced in the same manner as in Example 1 except that a substrate made of a cellulose resin (Konica Minolta Opto, KC4UAW) was used in place of the acrylic resin. At this time, Rz and EIT of each surface-treated film are shown in Table 1 below.
Comparative Example 1 and 2
A polarizing plate was produced in the same manner as in Example 1 except that a substrate made of a cellulose resin (TJ25UL, manufactured by Fuji Film Co., Ltd.) was used in place of the acrylic resin. At this time, Rz and EIT of each surface-treated film are shown in Table 1 below.
Comparative Example 3 and 4
Using a substrate made of the same acrylic resin as that of Example 1 (Sumitomo Chemical, TECHNOLLOY ™ film, 60 μm), a polarizing plate was produced in the same manner. At this time, Rz and EIT of each surface-treated film are shown in Table 1 below.
Experimental Example
The values obtained by multiplying the compressive moduli of the surface-treated films according to Examples and Comparative Examples by 10-point average roughness (Rz) were measured and Newton ring interference was determined, and the results are shown in Table 1 below.
Newton Ring Interference Judgment
The surface-treated films of Comparative Examples and Examples were bonded to a blackboard using an adhesive, and then a glass having a thickness of 1 mm or less was laminated on the surface-treated film while being bonded to the panel, and then the glass surface was pressed on the glass surface with a thumb. At this time, it was visually confirmed whether or not the Newton ring maze was observed on the inclined surface. The case where Newton ring maze occurred was judged as defective and the case where Newton ring maze did not occur was judged as good.
10 point average roughness
Referring to Table 1, the larger the 10-point average roughness (Rz) is, or the larger the compressive modulus of elasticity is, the more effective the Newton ring interference is. However, even if one of the 10-point average roughness and compressive modulus has a relatively small value When the multiplied value (× 10 3 N / m) is more than 10, which satisfies Equation 1, it is effective to improve Newton ring.
Claims (6)
A substrate on the polarizer; And
A surface-treating film provided on at least one side of the substrate and satisfying the following formula 1:
[Formula 1]
EIT x Rz > 10 x 10 < 3 > N / m
In Equation (1)
EIT is the compressive modulus (GPa) of the surface treated film,
Rz is the 10-point average roughness (탆).
Wherein EIT x Rz is 15 x 10 < 3 > N / m or more in the above formula (1).
Wherein the substrate is a transparent substrate for optical use.
Wherein the surface treatment film is a single layer or a composite layer of two or more selected from the group consisting of a hard coating layer, an antistatic hard coating layer, an antiglare coating layer, an antistatic antiglare coating layer and a low reflection coating layer.
Wherein the image display device is a PID (public information display).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170040626A KR101978876B1 (en) | 2017-03-30 | 2017-03-30 | Polarizing plate comprising optical film and display device using the same |
| PCT/KR2017/012036 WO2018182118A1 (en) | 2017-03-30 | 2017-10-30 | Polarizing plate comprising optical film, and image display device |
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| KR1020170040626A KR101978876B1 (en) | 2017-03-30 | 2017-03-30 | Polarizing plate comprising optical film and display device using the same |
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| KR20180110819A KR20180110819A (en) | 2018-10-11 |
| KR101978876B1 true KR101978876B1 (en) | 2019-05-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007301970A (en) | 2005-08-03 | 2007-11-22 | Fujifilm Corp | Antireflection film, polarizing plate, and image display apparatus |
| WO2011055624A1 (en) | 2009-11-06 | 2011-05-12 | コニカミノルタオプト株式会社 | Polarizing plate and liquid crystal display device |
| JP2012078420A (en) * | 2010-09-30 | 2012-04-19 | Sumitomo Chemical Co Ltd | Light diffusing polarizer plate, and liquid crystal display device |
| JP2012180422A (en) * | 2011-02-28 | 2012-09-20 | Sumitomo Chemical Co Ltd | Acrylic resin film, polarizing plate using the same and method for producing acrylic resin film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4033695B2 (en) | 2002-03-25 | 2008-01-16 | 株式会社きもと | Newton ring prevention sheet |
| TW200632002A (en) * | 2004-11-30 | 2006-09-16 | Fuji Photo Film Co Ltd | Polarizing plate and liquid crystal display device comprising the same |
| JP5959799B2 (en) * | 2010-02-25 | 2016-08-02 | 住友化学株式会社 | Manufacturing method of polarizing plate |
| JP6249820B2 (en) * | 2014-02-27 | 2017-12-20 | 住友化学株式会社 | Manufacturing method of polarizing plate and polarizing plate |
| KR102225056B1 (en) * | 2014-12-03 | 2021-03-09 | 엘지디스플레이 주식회사 | Curved liquid crystal display device |
-
2017
- 2017-03-30 KR KR1020170040626A patent/KR101978876B1/en active IP Right Grant
- 2017-10-30 WO PCT/KR2017/012036 patent/WO2018182118A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007301970A (en) | 2005-08-03 | 2007-11-22 | Fujifilm Corp | Antireflection film, polarizing plate, and image display apparatus |
| WO2011055624A1 (en) | 2009-11-06 | 2011-05-12 | コニカミノルタオプト株式会社 | Polarizing plate and liquid crystal display device |
| JP2012078420A (en) * | 2010-09-30 | 2012-04-19 | Sumitomo Chemical Co Ltd | Light diffusing polarizer plate, and liquid crystal display device |
| JP2012180422A (en) * | 2011-02-28 | 2012-09-20 | Sumitomo Chemical Co Ltd | Acrylic resin film, polarizing plate using the same and method for producing acrylic resin film |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018182118A1 (en) | 2018-10-04 |
| KR20180110819A (en) | 2018-10-11 |
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