KR101727702B1 - Anti-glare coating composition for improved contrast ratio and anti-glare film having improved contrast ratio using the same - Google Patents
Anti-glare coating composition for improved contrast ratio and anti-glare film having improved contrast ratio using the same Download PDFInfo
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- KR101727702B1 KR101727702B1 KR1020150085870A KR20150085870A KR101727702B1 KR 101727702 B1 KR101727702 B1 KR 101727702B1 KR 1020150085870 A KR1020150085870 A KR 1020150085870A KR 20150085870 A KR20150085870 A KR 20150085870A KR 101727702 B1 KR101727702 B1 KR 101727702B1
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Abstract
The present invention provides an anti-glare film having high anti-glare properties while exhibiting high contrast ratio and excellent image clarity. In particular, the present invention includes an organic or inorganic fine particle, a photocurable resin, and a photoinitiator, wherein the photocurable resin comprises 2 to 30 parts by weight of a high molecular weight acrylate polymer having a weight average molecular weight of 10,000 or more, And an antiglare film produced using the antiglare coating composition.
Description
The present invention relates to an antiglare coating composition exhibiting a high contrast ratio and excellent image clarity, and an antiglare film using the same.
Flat panel displays (FPDs) such as LCDs, PDPs, OLEDs, and rear-projection TVs, when exposed to external light such as natural light, cause fatigue or headaches in the user's eyes due to reflected light on the surface. And there is a problem that an image formed inside the display is not recognized as a clear image. In order to solve such a disadvantage, an anti-glare film is used to form an unevenness on the display surface to scatter external light on the surface, or to induce internal scattering using the refractive index between the resin forming the coating film and the fine particles. .
For this purpose, an anti-glare film applied to the surface of a display device or the like is required not only to prevent glare, but also to have high sharpness and high contrast ratio. However, in general, the higher the haze value, the greater the degree of diffusion of external light and the better the anti-glare effect. However, the contrast ratio is reduced due to image distortion caused by scattering of the surface and whitening due to internal scattering.
As described above, when the sharpness and the contrast ratio are increased, the anti-glare properties are lowered, and when the anti-glare properties are increased, the image clarity and the contrast ratio are lowered. How to control such properties is not limited to the manufacture of anti- It is an important technology.
Therefore, research for development of anti-glare film having high anti-glare properties while exhibiting high contrast ratio and excellent image clarity is required.
An object of the present invention is to provide an antiglare coating composition which exhibits a high contrast ratio and excellent image clarity and is excellent in anti-glare properties.
The present invention also aims to provide an anti-glare film produced using the coating composition.
The present invention also provides a display device including the anti-glare film.
The present invention relates to a photocurable resin composition comprising an organic or inorganic fine particle, a photocurable resin, and a photoinitiator, wherein the photocurable resin comprises 2 to 30 parts by weight of a high molecular weight acrylate polymer having a weight average molecular weight of 10,000 or more, / RTI >
The present invention also provides an antiglare film produced using the coating composition.
The present invention also provides a display device including the antiglare film.
Hereinafter, an anti-glare coating composition according to a specific embodiment of the present invention, an anti-glare film manufactured using the anti-glare coating composition, and a display device including the film will be described in detail.
The inventors of the present invention have been studying an anti-glare film having high anti-glare properties while exhibiting a high contrast ratio and excellent image clarity. However, when a high molecular weight acrylate polymer is used in a photo-curable resin, The present invention has been accomplished on the basis of the finding that it is possible to produce a film exhibiting high contrast ratio and excellent image clarity.
In general, the higher the haze value, the greater the degree of diffusion of external light, and the better the anti-glare effect. On the other hand, the image degradation due to scattering of the surface and the whitening due to internal scattering cause the contrast ratio to decrease. Therefore, since the sharpness and the contrast ratio are opposite to each other, how to control the two is an important technical factor in manufacturing an anti-glare coating film for a high-resolution display.
According to an embodiment of the present invention, an anti-glare coating composition capable of producing an anti-glare coating film for a high-resolution display having high anti-glare properties while exhibiting high contrast ratio and excellent image clarity is provided. The anti-glare coating composition of the present invention comprises an organic or inorganic fine particle, a photo-curable resin, and a photoinitiator, wherein the photo-curable resin comprises a high molecular weight acrylate polymer having a weight average molecular weight of 10,000 or more, To 30 parts by weight.
In the present invention, the photo-curable resin is a reactive acrylate oligomer group consisting of urethane acrylate oligomer, epoxy acrylate oligomer, polyester acrylate, and polyether acrylate; And dipentaerythritol hexaacrylate, dipentaerythritol hydroxy pentaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, trimethylene propyl triacrylate, propoxylated glycerol triacrylate, trimethyl propane ethoxy tri At least one member selected from the group consisting of polyfunctional acrylate monomers consisting of acrylate, 1,6-hexanediol diacrylate, propoxylated glycerol triacrylate, tripropylene glycol diacrylate, and ethylene glycol diacrylate . ≪ / RTI >
In particular, the photocurable resin may contain a predetermined high-molecular-weight acrylate polymer to control the behavior of particles present in the coating liquid, thereby effectively controlling the surface irregularity phenomenon. Since the acrylate polymer having a high molecular weight is present in the binder resin, the movement of the particles is reduced, and the external irregularities are formed to be low and wide so that the contrast ratio value can be improved.
The high molecular weight acrylate-based polymer may include an acrylate-based functional group or a methacrylate-based functional group. For example, the high molecular weight acrylate-based polymer may be selected from the group consisting of urethane acrylate, epoxy acrylate, polyester acrylate, and polyether acrylate, dipentaerythritol hexaacrylate, dipentaerythritol hydroxy pentaacrylate, pentaerythritol tetraacrylate , Pentaerythritol triacrylate, trimethylene propyl triacrylate, propoxylated glycerol triacrylate, trimethyl propane ethoxy triacrylate, 1,6-hexane diol diacrylate, propoxylated glycerol triacrylate, Triethylene glycol diacrylate, tripropylene glycol diacrylate, ethylene glycol diacrylate, and the like. Of these, an acrylate-based polymer or an acrylate-based polymer or an epoxyacrylate-based polymer containing a urethane group can be used as the high molecular weight acrylate-based polymer.
In the present invention, in the case of the high molecular weight acrylate polymer, there is an acrylate or methacrylate type reactor, and the polymer can react with the polyfunctional monomer used in the binder resin to form a harder coating film. However, in general, there is no reactive functional group such as a known cellulose polymer or the like, so that the hardness of the coating film is relatively lowered, and the surface scratch characteristic is also deteriorated. In addition, the high molecular weight acrylate-based polymer applied to the present invention has particle agglomeration control ability, whereas the cellulose-based polymer can not effectively control surface irregularities.
In particular, the high molecular weight acrylate polymer may have a weight average molecular weight of 10,000 or more, or 10,000 to 100,000, and preferably 30,000 or more. The high molecular weight acrylate polymer used in the photocurable resin should have a weight average molecular weight of 10,000 or more in terms of particle aggregation control.
The high molecular weight acrylate polymer is contained in an amount of 2 to 30 parts by weight, preferably 2 to 20 parts by weight, more preferably 2 to 10 parts by weight, based on the total weight of the photocurable resin. The content of the high molecular weight acrylate polymer should be not less than 2 parts by weight with respect to 100 parts by weight of the total resin in terms of high contrast ratio, and not more than 30 parts by weight from the viewpoint of coating property.
The antireflection coating composition of the present invention has a feature of scattering light including organic or inorganic fine particles together with a photocurable resin. To optimize the scattering effect of light, the organic or inorganic fine particles may be spherical particles having an average particle diameter of 1 to 10 mu m, preferably 1 to 5 mu m, more preferably 1 to 3 mu m. The particle size of the organic or inorganic fine particles may be 1 占 퐉 or more in terms of optimizing the light scattering effect, and may be 10 占 퐉 or less in terms of haze or coating thickness. For example, when the particle size of the fine particles exceeds 10 mu m and becomes excessively large, the thickness of the coating must be increased in order to achieve an appropriate haze, and the crack resistance of the film may be deteriorated.
The organic or inorganic fine particles are used for forming an anti-glare film, and the composition is not limited thereto. Specifically, the organic or inorganic fine particles may be an organic fine particle group composed of an acrylic resin, a styrene resin, an epoxy resin, a nylon resin, and a copolymer resin thereof; And inorganic fine particles made of silicon oxide, titanium dioxide, indium oxide, tin oxide, zirconium oxide, and zinc oxide.
More specifically, the organic fine particles may be at least one selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl Acrylate, stearyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, n-octyl (meth) acrylate, Acrylates such as polyethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, glycidyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, diethylaminoethyl But are not limited to, methylstyrene, m-methylstyrene, p-ethylstyrene, m-ethylstyrene, p-chlorostyrene, m- chlorostyrene, p- chloromethylstyrene, m- chloromethylstyrene, styrenesulfonic acid, m-butoxystyrene, vinyl acetate (Meth) acrylic acid, maleic acid, unsaturated carboxylic acid, alkyl (meth) acrylamide, (meth) acrylonitrile and the like), vinylidene fluoride, (Meth) acrylate, and the like.
The organic fine particles may be selected from the group consisting of polystyrene, polymethyl methacrylate, polymethyl acrylate, polyacrylate, polyacrylate-co-styrene, polymethyl acrylate-co-styrene, polymethyl methacrylate- Polyvinyl chloride resin, polycarbonate resin, polyvinyl chloride resin, polybutylene terephthalate, polyethylene terephthalate, polyamide resin, polyimide resin, polysulfone, polyphenylene oxide, polyacetal, epoxy resin, phenol resin, silicone resin, melamine resin, One single or two or more copolymers thereof selected from amine, polydivinylbenzene, polydivinylbenzene-co-styrene, polydivinylbenzene-co-acrylate, polydiallyl phthalate and triallyl isocyanurate polymer (copolymer) may be used, but the present invention is not limited thereto.
In order to prevent the glare phenomenon recognized by the user, such organic or inorganic fine particles are added to induce a scattering effect of light. In order to optimize such effect, preferably 100 wt.% Of the photo- 1 to 20 parts by weight, more preferably 5 to 15 parts by weight, and most preferably 6 to 10 parts by weight, based on 100 parts by weight of the resin.
When the organic or inorganic fine particles are contained in an amount of less than 1 part by weight based on 100 parts by weight of the photocurable resin, the haze value due to internal scattering may not be sufficiently realized. When the organic or inorganic fine particles are more than 20 parts by weight, The coating property becomes poor, and the haze value due to the internal scattering becomes too large, and the contrast ratio may be lowered.
In the antireflection coating composition of the present invention, the refractive index difference with the organic or inorganic fine particles may be 0.005 to 0.1, preferably 0.01 to 0.07, more preferably 0.015 to 0.05. If the refractive index difference between the fine particles and the photocurable resin is less than 0.005, it may be difficult to obtain an appropriate haze value required for the antiglare film. If the refractive index difference between the fine particles and the photocurable resin exceeds 0.1, the internal haze value becomes large, so that it may be difficult to obtain a high contrast ratio.
The antireflection coating composition of the present invention may contain a photoinitiator for the purpose of curing by ultraviolet irradiation together with a photocurable resin and organic or inorganic fine particles. Wherein the photoinitiator is selected from the group consisting of 1-hydroxycyclohexyl phenyl ketone, benzyl dimethyl ketal, hydroxydimethylacetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin butyl ether A single substance or a mixture of two or more substances may be used, but the present invention is not limited to the examples described above.
At this time, the photoinitiator may be added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the photocurable resin. When the photoinitiator is contained in an amount of less than 0.1 part by weight based on 100 parts by weight of the photo-curable resin, sufficient photo-curing may not be caused by ultraviolet irradiation. If the photoinitiator is contained in an amount exceeding 10 parts by weight based on 100 parts by weight of the photo- The film strength of the anti-glare film may deteriorate.
Meanwhile, the coating composition according to the above embodiments may further include an organic solvent. When such an organic solvent is added, the composition is not limited. However, considering the proper viscosity of the coating composition and the film strength of the finally formed film, the amount of the organic solvent is preferably 50 to 100 parts by weight based on 100 parts by weight of the photo- 500 parts by weight, more preferably 100 to 400 parts by weight, and most preferably 150 to 350 parts by weight.
At this time, the type of the organic solvent that can be used is not limited in its constitution, but may be selected from the group consisting of lower alcohols having 1 to 6 carbon atoms, acetates, ketones, cellosolve, dimethylformamide, tetrahydrofuran, propylene glycol monomethyl ether, And xylene may be used alone or in combination of two or more.
The lower alcohol may be methanol, ethanol, isopropyl alcohol, butyl alcohol, isobutyl alcohol, or diacetone alcohol. However, the present invention is not limited to the above examples. The above-mentioned acetates may be methyl acetate, ethyl acetate, isopropyl acetate, butyl acetate, or cellosolve acetate. The ketones may be methyl ethyl ketone, methyl isobutyl ketone, acetylacetone, or acetone. However, the present invention is not limited to the above-described examples.
In addition, the anti-glare coating composition according to the above embodiments may further include at least one additive selected from the group consisting of a leveling agent, a wetting agent, a defoaming agent, and silica having a volume average particle diameter of 1 to 50 nm. The additive may be added in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the photocurable resin.
The leveling agent serves to uniformize the surface of the coated film using an antiglare coating composition. In addition, since the wetting agent serves to lower the surface energy of the anti-glare coating composition, it helps to uniformly coat the anti-glare coating composition on the transparent substrate layer.
At this time, the antifoaming agent may be added to remove air bubbles in the antiglare coating composition. The silica is added as inorganic particles to improve scratch resistance and film strength in the coating film. When silica having a volume average particle diameter of 1 to 50 nm is used, a transparent coating film can be secured, And thus it is preferable.
In another embodiment of the invention, the present invention provides an anti-glare film made using the anti-glare coating composition as described above. The anti-glare film of the present invention includes a transparent substrate layer and an anti-glare layer formed on the transparent substrate layer and formed of the above-described coating composition.
Meanwhile, the present invention provides an anti-glare film made using the anti-glare coating composition according to another embodiment according to another embodiment. An anti-glare film according to an embodiment of the present invention includes an anti-glare layer laminated on a transparent substrate layer and a transparent substrate layer and made of an anti-glare coating composition according to the above-described embodiment.
The method for forming the anti-glare layer using the anti-glare coating composition on the transparent substrate layer is not limited in its constitution. However, the anti-glare layer may be formed by a method such as roll coating, bar coating, spray coating, dip coating, Coating method. The structure of the antiglare layer thus formed is replaced with the description of the antiglare coating composition described above.
The material of the transparent base material of the transparent base layer is not particularly limited in its constitution, and any material conventionally used in the technical field of the production of the anti-glare film may be used. Specifically, it may be at least one member selected from the group consisting of triacetylcellulose (TAC) polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC) and norbornene polymers. However, . Preferably, when an anti-glare film is applied to a polarizing plate for a high-resolution display, it can be produced using triacetyl cellulose (TAC). The transparent base layer preferably has a transmittance of at least 85%. Further, the haze value may be 1% or less and the thickness may be 30 to 120 탆, but the present invention is not limited to the above-mentioned haze value and thickness.
Such an anti-glare film is characterized in that the anti-glare layer contains an olefin oxide compound represented by the above formula (1) or (2) and has excellent physical properties required for anti-glare films such as transmittance, haze, reflection gloss, image clarity and contrast ratio .
Specifically, the anti-glare film according to the above-described embodiment has a transmittance of 90% or more, a haze of 5 or less, a 60-degree reflection gloss of 70 to 90, a phase clearness of 250% or less as measured in accordance with JIS- And the contrast ratio measured according to KS C IEC 61988-2-1 is not less than 400, and the physical properties required for the anti-glare film for display devices are excellent.
Meanwhile, the anti-glare film according to the above-described embodiment may further include a low reflection layer which is further laminated on the anti-glare layer and / or the back surface of the transparent base layer. At this time, the thickness of the low reflection layer may be 40 to 200 nm, and the refractive index may be 1.2 to 1.45. As a low refractive index material for forming such a low reflection layer, metal fluorides such as NaF, LiF, AlF 3 , Na 5 AlF 6 , MgF 2 and YF 3 having a refractive index of 1.40 or less may be used alone or in combination of two or more And a particle diameter of 1 to 100 nm can be preferably used.
In addition, the low-reflection layer may further include fluorine-based silane. Specifically, tridecafluorooctyltriethoxysilane, heptadecafluorodecyltrimethoxysilane, and heptadecafluorodecyltriisopropoxysilane may be used. , And one kind or two or more kinds of such fluorine silanes may be used, but the present invention is not limited to the above examples.
According to another embodiment, the anti-glare film may further include an anti-glare layer stacked on the back surface of the transparent substrate layer of the anti-glare film and / or the anti-glare layer. The thickness of the contaminant layer may be greater than 0 and less than 100 nm, and the contaminant layer may be formed using a monofunctional and polyfunctional acrylate containing a fluorine group, but the present invention is not limited thereto.
On the other hand, the present invention provides a display device comprising the anti-glare film according to another embodiment. Such a display device may be a high-resolution flat panel display, specifically, an LCD, a PDP, an OLED, or a rear-projection TV.
In the present invention, matters other than those described above can be added or subtracted as required, and therefore, the present invention is not particularly limited thereto.
INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to manufacture an anti-glare film which exhibits excellent physical property values required for anti-glare films such as transmittance, haze, reflection gloss, image clarity and contrast ratio, The present invention can be applied to an industrial sale related to the production of a protective film.
1 is a micrograph of an anti-glare film according to Example 1 of the present invention.
2 is a photomicrograph of an anti-glare film according to Comparative Example 1 of the present invention.
3 is a micrograph showing the particle agglomerated shape of a film using cellulose acetate butyrate according to Comparative Example 3 of the present invention.
Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.
<Examples>
Example 1
30 g of a polyfunctional monomer (PETA, molecular weight 298), 2.5 g of polymer (BEAMSET 371, Arakawa, epoxy acrylate, molecular weight 40,000), 20 g of methyl ethyl ketone as solvent, 2 g of photoinitiator (Irgacure 184, Ciba) 2 g of an acrylic-styrene copolymer resin (manufactured by Sekisui Plastic), which is spherical organic fine particles having an average particle diameter of 2 占 퐉 and a refractive index of 1.525, was added to the hard coating liquid composition prepared by uniformly mixing 0.5 g of a thermosetting resin (Tego wet 270) , An antiglare coating composition was prepared.
After coating using a bar coated on a transparent substrate of an antiglare coating composition prepared by a triacetylcellulose thickness 80 ㎛, that the anti-glare coating composition dried thickness such that the 4 ㎛, irradiation of ultraviolet light of 280 mJ / cm 2 To thereby obtain an antiglare film.
Example 2
An anti-glare film was prepared in the same manner as in Example 1 except that 2.5 g of methyl methacrylate (MMA, methylmethacrylate) having a molecular weight of 30,000 was used instead of the polymer having a molecular weight of 40,000 used in Example 1.
Comparative Example 1
A film having a dry thickness of 2 탆 was prepared in the same manner as in Example 1, except that 35 g of the polyfunctional monomer (PETA) was used in Example 1 and no acrylate polymer was used.
Comparative Example 2
A film was prepared in the same manner as in Comparative Example 1, except that the dry thickness was changed to 4 탆.
Comparative Example 3
Except that 2.5 g of a cellulose polymer (cellulose acetate butyrate, CAM 381-2, molecular weight: 40,000) was used in place of the acrylate polymer in Example 1, and a dry thickness of 2 탆 Lt; / RTI >
<Experimental Example>
The anti-glare films according to Examples 1 and 2 and Comparative Examples 1 to 3 were evaluated for physical properties by the following methods, and the measurement results thereof are shown in Table 1 below.
1) Transmittance / haze measurement
The transmittance and haze value were measured using HM-150 manufactured by Murakami Color Research Laboratory Co., Ltd. according to JIS-K-7105.
2) 60 ° reflection Gloss measurement
Using a micro-TRI-gloss manufactured by BYK Gardner, a 60 ° reflection gloss was measured.
3) Phase Sharpness (%)
The image clarity was measured using ICM-1T manufactured by Suga Test Instrument Co., LTD.
4) Flammability (Fluorescent spreading)
A black tape was attached to the back of the anti-glare film, and then a fluorescent lamp was irradiated to observe the degree of formation of a fluorescent lamp image on the film surface. Observation results were classified as follows.
◎: Fluorescent lamp shape is not observed
○: Although the shape of the fluorescent lamp is formed, it is seen as a whole.
X: The shape of the fluorescent lamp is clearly visible.
5) Contrast ratio
The contrast was measured according to Korean Industrial Standard (KS C IEC 61988-2-1).
As shown in Table 1, in the case of the coating films of Examples 1 and 2 using the high molecular weight acrylate polymer according to the present invention, it can be seen that the coating film has a high contrast ratio and a high contrast ratio. However, in the case of Comparative Examples 1 and 2, when the coating thickness is coated by the particle size, the contrast ratio is greatly reduced while having a severe scattering property. On the contrary, when the coating thickness becomes thick, The antiglare property remarkably decreases and the antireflection film can not function. In the case of Comparative Example 3 using a cellulose-based polymer instead of an acrylate-based polymer, the haze was high and the contrast ratio was deteriorated with severe retardation.
1 and 2, micrographs of the anti-glare film according to Example 1 and Comparative Example 1 of the present invention are shown, respectively. Particularly, in the case of using an acrylate polymer having a high molecular weight according to the present invention, the movement of particles is low and uneven as shown in FIG. 1, and the contrast ratio value is improved. However, as shown in Fig. 2, when the high molecular weight polymer was not used, the contrast ratio value was low when the coating thickness was 2 占 퐉 according to Comparative Example 1, and the coating thickness was 4 占 퐉 or thicker In this case, there is no flashing. Particularly, when a cellulose polymer having no reactive functional group is used in accordance with Comparative Example 3, unevenness is formed as shown in FIG. 3D, resulting in a problem that the haze is high and the contrast ratio value is low.
Claims (11)
Wherein the high molecular weight acrylate-based polymer comprises an epoxy acrylate-based functional group or a methacrylate-based functional group, and the organic or inorganic fine particles have an average particle diameter of 1 to 3 μm.
The photocurable resin may be at least one selected from the group consisting of dipentaerythritol hexaacrylate, dipentaerythritol hydroxypentaacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, trimethylene propyl triacrylate, propoxylated glycerol triacrylate, trimethyl Selected from the group of multifunctional acrylate monomers consisting of propane ethoxy triacrylate, 1,6-hexane diol diacrylate, propoxylated glycerol triacrylate, tripropylene glycol diacrylate, and ethylene glycol diacrylate ≪ / RTI > further comprising one or more of the following ingredients.
The organic or inorganic fine particles may be an organic fine particle group composed of an acrylic resin, a styrene resin, an epoxy resin and a nylon resin; And at least one inorganic fine particle group selected from the group consisting of silicon oxide, titanium dioxide, indium oxide, tin oxide, zirconium oxide and zinc oxide.
Wherein the photocurable resin has a refractive index difference of 0.005 to 0.1 with organic or inorganic fine particles.
Wherein the photoinitiator is selected from the group consisting of 1-hydroxycyclohexyl phenyl ketone, benzyl dimethyl ketal, hydroxydimethylacetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin butyl ether At least one anti-glare coating composition selected.
An anti-glare film laminated on said transparent substrate layer and comprising an anti-glare layer formed from the coating composition according to any one of claims 1, 4, or 6 to 8.
A transmittance measured according to JIS-K-7105 of not less than 90%, a haze of not more than 5, a 60 ° reflection gloss of 70 to 90, a phase clearness of not less than 250% An anti-glare film having a measured contrast ratio of 722 or more.
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| CN109804277B (en) * | 2016-12-12 | 2022-01-11 | 株式会社Lg化学 | Optical film and image display device including the same |
| KR101988548B1 (en) | 2016-12-12 | 2019-06-12 | 주식회사 엘지화학 | Optical film and display device comprising the same |
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| WO2019107923A1 (en) * | 2017-11-28 | 2019-06-06 | 주식회사 엘지화학 | Visibility improving film for display panel, and display device comprising same |
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| WO2019172731A1 (en) * | 2018-03-09 | 2019-09-12 | 주식회사 엘지화학 | Visibility improvement film for display panel, and display device comprising same |
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| CN115651433A (en) * | 2022-10-24 | 2023-01-31 | 江苏日久光电股份有限公司 | Hardened coating and preparation method thereof, hardened layer and protective film containing hardened layer |
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2015
- 2015-06-17 KR KR1020150085870A patent/KR101727702B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008225195A (en) * | 2007-03-14 | 2008-09-25 | Daicel Chem Ind Ltd | Antiglare film and method for manufacturing the same |
| JP2014525056A (en) | 2011-07-18 | 2014-09-25 | エルジー・ケム・リミテッド | Anti-glare film exhibiting high contrast ratio and method for producing the same |
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| Publication number | Publication date |
|---|---|
| KR20150144724A (en) | 2015-12-28 |
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