WO2015012617A1 - High-luminance polarizing plate and liquid crystal display device including same - Google Patents

High-luminance polarizing plate and liquid crystal display device including same Download PDF

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WO2015012617A1
WO2015012617A1 PCT/KR2014/006752 KR2014006752W WO2015012617A1 WO 2015012617 A1 WO2015012617 A1 WO 2015012617A1 KR 2014006752 W KR2014006752 W KR 2014006752W WO 2015012617 A1 WO2015012617 A1 WO 2015012617A1
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Prior art keywords
polarizing plate
high
polarizer
liquid crystal
refractive index
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PCT/KR2014/006752
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French (fr)
Korean (ko)
Inventor
홍경기
정재호
박준욱
이병민
심재훈
유제혁
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주식회사 엘지화학
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    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of optical devices, e.g. polarisers, reflectors or illuminating devices, with the cell
    • G02F1/133528Polarisers
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made
    • G02B1/10Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/105Protective coatings
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made
    • G02B1/10Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14Protective coatings, e.g. hard coatings
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • G02B5/3025Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033Polarisers, 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
    • G02B5/3041Polarisers, 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
    • G02B5/305Polarisers, 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 including organic materials, e.g. polymeric layers

Abstract

The present invention relates to a high-luminance polarizing plate and a liquid crystal display device including the high-luminance polarizing plate as a lower polarizing plate, the high-luminance polarizing plate including: a polarizer; and a protection film arranged on one surface of the polarizer, wherein the protection film is arranged to face a backlight unit and a primer layer containing a low refractive polymer resin, and hollow fine particles are formed on a surface opposite to a surface facing the polarizer.

Description

A polarizing plate and a high-brightness liquid crystal display device comprising the same

The present invention relates to a liquid crystal display comprising a high luminance polarizing plate and this, and more specifically to a liquid crystal display device of anti-blocking property is excellent, and includes the high luminance polarizing plate and it may help improve the brightness of the liquid crystal display device.

Recently, a liquid crystal display device is widely used ranging from a large electronic device such as the portable phone or a portable small electronic device, a personal computer or television, and its use has been increasingly expanding. This liquid crystal display apparatus was typically by placing the light source such as a light unit on the back surface of the lower polarizing plate is provided on the liquid crystal cell lower side, transmits light emitted from the light source to the liquid crystal cell because they are not elements of the self-emission type image displays.

On the other hand, the liquid crystal display device can implement a bright image the higher the luminance, the higher the brightness of the white state study for the brightness enhancement of the bar, the liquid crystal display device capable of implementing a clear image increases the contrast ratio are being actively conducted.

In this regard, the prior art has a low degree of polarization of the problems for increasing the brightness by lowering the concentration of the iodine polarizer has been proposed a method for lowering the concentration of iodine in the polarizer as a method for improving luminance of the liquid crystal display device. Further, of the light emitted from the backlight unit and having a reflecting-type polarizing plate in the outer shell of the lower polarizing plate to selectively reflect the light of the unwanted polarization state in the lower polarizer make better use of light over the re-reflected in the light unit reflector techniques It proposed, but, how to take advantage of the reflection type polarizing plate has the disadvantage that an additional process and expensive materials enter.

On the other hand, in general, to exist in the air gap (air gap) between the lower polarizing plate of the liquid crystal display device and a backlight unit, and that the light reflection caused by a refractive index difference between the air gap and the lower polarizing plate, due to the reflective light unit the amount of light incident on the lower polarizing plate of the light emitted from the less is the luminance is dropped. However, improvements of the proposed methods so far luminance was not prevent the intended as such air gap (air gap) as the luminance decreases due to increase utilization of light.

Therefore, to prevent luminance deterioration caused by the air gap (air gap) between the lower polarizer and the backlight unit, a new technology capable of improving the brightness of the liquid crystal display device has been required.

The present invention for solving the above problems, anti-blocking properties as well as superior air gap between the lower polarizer and the backlight unit in a simple way (air gap) to improve the luminance by preventing from luminance deterioration which it intends to provide a liquid crystal display comprising a polarizing plate and a high-luminance them.

On the other hand, object of the present invention is not limited to the above-described information. An object of the present invention will be understood from the overall context of the present specification, Those having ordinary skill in the art will not have any difficulty to understanding an additional object of the present invention.

In one aspect, the present invention provides a polarizer; And a protective film disposed on one side of the polarizer, wherein the protective film is disposed so as to face the backlight unit, and a primer layer to the reverse side of the surface facing the polarizer comprises a low refractive index polymer resin and the hollow fine particles It provides a high-brightness polarizing plate that is formed.

In this case, the high-brightness polarizing plate is preferably in the lower polarizing plate of the liquid crystal display device.

On the other hand, the primer layer preferably has a refractive index of 1.48 or less.

Further, the primer layer preferably has a static friction coefficient of 0.8 or less.

Further, the primer layer preferably has a dynamic friction coefficient of 0.8 or less.

On the other hand, the hollow fine particles is preferably in a hollow silica.

Moreover, the hollow fine particles is preferably a refractive index of 1.40 or less.

Moreover, the hollow fine particles preferably have an average particle size of 10 to 200㎚.

Moreover, the hollow fine particles is preferably an amount of 10 to 300 parts by weight per 100 parts by weight of the low refractive index polymer resin.

On the other hand, the low refractive index polymeric resin may be polyurethane resin, acrylic resin, polyester resin, or a combination thereof.

At this time, the refractive index of the low refractive index polymer resin is preferably not more than 1.55.

On the other hand, the thickness of the primer layer is preferably from 10 to 500㎚.

On the other hand, is the reflectance of the protective film is preferably 3.5% or less.

Further, the permeability of the protective film is preferably not less than 93%.

In another aspect, the invention provides a liquid crystal cell; An upper polarizer provided on the upper part of the liquid crystal cell; A lower polarizer provided on the lower layer portion of the liquid crystal cell; And a backlight unit provided at the lower part of the lower polarizing plate, and provides a high luminance of the lower polarizing plate The polarizing plate of the liquid crystal display device.

In addition, solving means of the above-described problems is, it is not enumerate all features of the present invention. The various features and advantages and effects thereof of the present invention will be understood in more detail with reference to specific embodiments below.

High brightness polarizing plate of the present invention includes a primer layer containing a low refractive index polymer resin and the hollow fine particles to the surface adjacent to the backlight unit, in which the primer layer is an anti-blocking properties (slip properties), excellent bar, the winding of the film during the manufacturing process there is an advantage that a separate functional coating is required for protection.

Further, the high-brightness polarizing plate of the present invention can prevent the reflection of light generated in the air gap between the high luminance polarizing plate and a backlight unit by the primer layer, and as a result may increase the amount of light incident on the liquid crystal cell, and therefore this the liquid crystal display device including can obtain a high brightness enhancement effect.

Further, the high-brightness polarizing plate of the present invention has the advantage of the method of forming the primer layer is extremely simple, and the material for forming the unit price competitive excellent low.

1 is a sectional view illustrating a liquid crystal display of the present invention.

2 and 3 are cross-sectional views for explaining the high-brightness polarizing plate of the present invention.

Hereinafter, it will be described with reference to the drawings, preferred embodiments of the present invention. However, embodiments of the present invention can be modified in many different forms and is not limited to the embodiments and the scope of the present invention described below. In addition, embodiments of the present invention is provided in order to explain more fully the present invention to those having ordinary skill in the art. In addition, to the elements shown in figures are exaggerated or reduced to facilitate explanation, it may be omitted.

The inventors of the present invention to a protective film adjacent to the backlight unit of the lower polarizing plate is provided in the lower part of the liquid crystal cell in the result, the liquid crystal display device of extensive studies to achieve the foregoing object comprises a low refractive index polymer resin and the hollow fine particles when used to form a primer layer, determine that the anti-blocking properties is that the advantage of being solid, as well as, further to have excellent brightness enhancement effect by reducing the reflection of light incident from a separate backlight unit in a simple way without the need for treatment out the present invention has been completed.

Figure 1 shows an example implementation of a liquid crystal display of the present invention.

A liquid crystal display device shown in Figure 1, cell 20, the liquid crystal; An upper polarizing plate 10 provided on the upper part of the liquid crystal cell 20; High brightness polarizing plate 30 is provided in the lower part of the liquid crystal cell 20; And a backlight unit 40 provided in the lower part of the high-brightness polarizing plate 30, this time is the high-brightness polarizing plate 30 is provided with a primer layer 34 on the side adjacent to the light unit.

Hereinafter, a look at in more detail with respect to the respective structures of the liquid crystal display of the present invention.

1. The high-brightness polarizing plate

First, description will be made on the high-brightness polarizing plate 30 used in the liquid crystal display apparatus according to the present invention;

High brightness polarizer 30 of the present invention comprises a protective film (31, 33) disposed on at least one surface of the upper layer and the polarizer 32 of the polarizer 32. In this case, the protective film may be provided with both the upper part and lower part of both sides, that is, the polarizer 32 of the polarizer 32 may be provided only on lower layer of the polarizer 32.

On the other hand, high-intensity polarizer 30 of the present invention, including a lower layer, i.e. the primer layer on the opposite side of the side facing the protective film 33, the polarizers that are disposed so as to face the backlight unit 34 of the polarizer 32 do.

In Fig 2 and 3 are embodiments of high brightness polarizing plate 30 of this invention are shown.

As it is shown in Figure 2, the high-brightness polarizing plate 30 of the present invention a polarizer (32); The liquid crystal cell side protective film 31, which is provided in the upper part of the polarizer (32); A backlight-unit-side protective film 33 is provided in the lower part of the polarizer (32); And it may include a primer layer 34 is provided on the side close to the backlight unit of the backlight unit side protective film 33.

Alternatively, as shown in Figure 3, the high-brightness polarizing plate 30 of the present invention a polarizer (32); A backlight-unit-side protective film 33 is provided in the lower part of the polarizer (32); And it may include a primer layer 34 is provided on the side close to the backlight unit of the backlight unit side protective film 33.

On the other hand, it Figures 2 and although not shown in Figure 3, in the high-brightness polarizing plate 30 of the present invention may contain a retardation film for compensation period to the optical phase difference generated in the liquid crystal cell 20. In this case the structure with, for example, the liquid crystal cell side protective film 31 in this case is provided there may be a phase difference film is provided on the liquid crystal cell side protective film 31, a backlight-unit-side protective film 33 only If it is provided with can have a phase difference film is provided on the polarizer (32). At this time, the available retardation film in the present invention is not particularly limited, and a phase difference film which is generally used in the art based on various liquid crystal mode of the liquid crystal display device may be used.

Hereinafter, more specific description with respect to each component of the high-intensity polarizer 30.

end. Polarizers

First, the polarizer 32 according to the present invention may be used without limitation that is known in the art, can be used, for example a film made of a polyvinyl alcohol (PVA) comprising iodine or a dichroic dye. Although the polarizer can be manufactured by dyeing iodine or a dichroic dye to a polyvinyl alcohol film, and does also not particularly limited and a method of manufacturing.

On the other hand, in the polarizer herein it is meant the state which does not include the protective film, and the polarizing plate means a state including the polarizer and the protective film.

I. Protection Film

Next, the protective film (31, 33) are for now protect the polarizer and the protective film (31, 33) is low birefringence according to the present invention, transparency, mechanical strength, heat stability, excellent moisture and shielding it is preferred to use a film made of a polymer. For example, it is used as the acrylic film, a polyethylene terephthalate (PET) films, triacetyl cellulose (TAC) film, poly-norbornene (PNB) film, cyclo olefin polymer (COP) film, polycarbonate (PC) film.

On the other hand, in the present invention, the liquid crystal cell side protective film 31 and the backlight unit side protective film 33 is not limited thereto but are, among acrylic film, a polyethylene terephthalate (PET) film or a triacetyl cellulose (TAC ) it can be preferably used a film. Among them, it is considering the optical characteristics, durability and economical aspects, it is particularly preferred acrylic film.

On the other hand, a molding material using an acrylic film available in the present invention contains as a main component an acrylate-based resin (meth) can be obtained by molding by extrusion molding. In this case, the (meth) acrylate-based resin is a (meth) by a resin containing an acrylate-based unit as a main component, a (meth) as well as a homopolymer resin consisting of acrylate-based unit of the (meth) acrylate based unit in addition to the (meth) acrylate-based resin to the concept of another resin it includes a blend resin blends, such as other monomer units, the copolymer resin and the copolymer.

On the other hand, the (meth) acrylate-based unit may be, for example, alkyl (meth) acrylate-based unit. Here, the alkyl (meth) acrylate-based unit is to mean all of the system unit and an alkyl methacrylate unit alkyl acrylate, the alkyl (meth) alkyl acrylate-based unit is preferably of 1 to 10 carbon atoms , and more preferably a carbon number of 1-4.

Further, as the (meth) acrylate-based monomer unit copolymerizable with the unit, there may be mentioned styrene-based unit, maleic anhydride-based units, maleimide-based units.

At this time, as the styrene-based unit, but are not limited to, styrene, α- methylstyrene, 3-methylstyrene, 4-methylstyrene, 2,4-dimethyl styrene, 2,5-dimethyl styrene, 2-methyl- 4-chlorostyrene, 2,4,6-trimethyl styrene, cis-β- methylstyrene, trans-β- methylstyrene, 4-methyl -α- methyl styrene, 4-fluorine -α- methyl styrene, 4-chloro- α- methyl styrene, 4-bromo -α- methyl styrene, 4-t- butylstyrene, 2-fluoro styrene, styrene-3-fluoro, 4-fluoro-styrene, 2,4-difluoro styrene, 2,3 , a 4,5,6- pentafluoro styrene, 2-chlorostyrene, 3-chlorostyrene, 4-chlorostyrene, 2,4-dichloro-styrene, 2,6-dichloro styrene, octa-chlorostyrene, 2-bromostyrene and the like, 3-bromostyrene, 4-bromostyrene, 2,4-di-bromo-styrene, bromostyrene α-, β- bromostyrene, 2-hydroxystyrene, 4-hydroxystyrene coming Examples can be mentioned styrene, α- methyl Of styrene it is more preferable. These may be used alone or in combination.

In addition, in the maleic acid anhydride-based monomer it includes, but are not limited to, maleic anhydride, methyl maleic anhydride, ethyl maleic anhydride, propyl maleic anhydride, isopropyl maleic anhydride, cyclohexyl maleic anhydride, phenyl maleic an acid anhydride, etc. for example, and these may be used alone or in combination.

In addition, to the maleimide-based monomers, but are not limited to, maleimide, N- methyl maleimide, N- ethyl maleimide, N- propyl maleimide, N- isopropyl maleimide, N- cyclohexyl maleimide , a N- phenyl maleimide, etc. may be mentioned that for example, they may be used alone or in combination.

On the other hand, not the manufacturing method of the acrylic film is not particularly limited, and examples thereof include (meth) acrylate-based resin and the other polymer, and sufficiently mixed by the additives and the like in any suitable mixing method it after producing the thermoplastic resin composition after producing a molded and prepared by the film, or (meth) acrylate-based resin, other polymers, additives and the like as a separate solution and then form a homogeneous mixture by mixing them may be molded film. As the method of film forming, for example, it can be given any suitable film forming method such as a solution casting method (solvent casting method), a melt extrusion method, a calendar method, a compression molding method.

On the other hand, an acrylic film can be any of the non-stretched film or a stretched film. When the stretched film may be any of a uniaxial oriented film or a biaxially stretched film may be, and, in the simultaneous biaxial stretching film or a sequentially biaxially oriented film when the biaxially oriented film. In particular, when a biaxially stretched has improved mechanical strength is improved film performance. On the other hand, the stretching may be performed in a known stretching method in the art.

On the other hand, in the case of acrylic film generally anti-blocking properties to a surface, such as to give the anti-blocking properties (or slip) is includes the excellent functional coating layer. However, for high brightness polarizing plate 30 of the present invention, the backlight unit side protective film 33 comprises a primer layer (34) on one side, a primer layer is anti-blocking properties (or slip) is also excellent bar, this as there is an advantage that you can have excellent anti-blocking properties (or slip) does not include a separate functional coating layers.

On the other hand, in the high-brightness polarizing plate 30 of the present invention, the attachment of the polarizer 32 and the protective film (31, 33) is a roll coater, a gravure coater, a bar coater, a knife coater or a cache polarizer using a capillary coater 32 or after coating the adhesive on the surface of the protective film (31, 33), and these can be carried out by a heat laminating roll lamination, or by room temperature compression bonding method for laminating or after laminating the UV irradiation method. On the other hand, the adhesive may be used without the glue used in the art, for example, a polyvinyl alcohol-based adhesive, a polyurethane-based adhesive, an acrylic adhesive, a cationic or radical-based UV adhesive or the like limits.

All. A primer layer

Next, the primer layer 34 is given an excellent anti-blocking properties, and further to from the backlight unit to prevent reflection of light entering that for increasing the amount of light incident on the liquid crystal cell, the primer layer 34 is low by using a coating composition comprising a polymer resin and the refractive hollow fine particles is formed on the reverse side of the surface facing the polarizer of the backlight unit side protective film 33.

On the other hand, the liquid crystal display device of the present invention can achieve the high brightness enhancement effect in a simple manner by such a primer layer (34). Since More specifically, the primer layer 34 is lower than the refractive index of the protective film 33 is provided so as to be opposite to the backlight unit, of the small difference in refractive index between the air gap, the reflectance of the light passes through them enters the polarizing plate lowering, and increases the transmittance.

On the other hand, the method of forming the primer layer 34 on the backlight unit side protective film 33 is a well-known coating methods in the art, for example, a bar coating method, gravure coating method, a slot die coating method and the like can be carried out in a method for coating the coating composition on the base film and dried. At this time, the drying, but can be carried out through convection (convection) the oven or the like, without being limited thereto.

In addition, the protection in order to improve the adhesion between the film and the primer layer may be a surface treatment such as alkali treatment, a corona treatment or a plasma treatment performed on the surface of the protective film, if necessary.

On the other hand, the primer layer 34 and a refractive index of preferably 1.48 or less, more preferably 1.30 to 1.48 or 1.35 to 1.47. Since the refractive index of the primer layer 34 is not born in many cases higher than the above range, the refractive index higher or more, such as triacetyl cellulose film, a cyclo-olefin polymer film, an acrylic film to be used as a protective film, difference less the antireflection effect transmittance increases it is difficult to obtain the effect, is lower than the above range, it is difficult to screen coating.

Further, the primer layer 34 is preferably a static friction coefficient of 0.8 or less, more preferably 0.6 or less or 0.5 or less. When the static friction coefficient of the primer layer 34 is higher than the above range, it is difficult have a superior anti-blocking properties (or slip).

Further, the primer layer 34 is preferably a dynamic friction coefficient of 0.8 or less, more preferably 0.6 or less or 0.5 or less. Similarly, if the dynamic friction coefficient of the primer layer 34 is higher than the above range, it is difficult have a superior anti-blocking properties (or slip).

Further, preferably in the thickness of the primer layer 34 is from 10 to 500nm, and more preferably from 50 to 300nm. When the thickness of the primer layer 34 satisfy the above-mentioned range, due to high anti-reflection efficiency in a visible light region it is higher transmittance synergy.

On the other hand, the primer layer 34 is the backlight unit side protective film 33 which is coated is more preferable, and the reflectance is preferably not more than 3.5%, not more than 3.0%. The lower the reflectance of greater permeability synergistic effect.

Further, the primer layer 34 is the backlight unit side protective film 33 that is coated is preferably less than 93% transmittance, more preferably at least 93.5%. As the primer coating layer on a protective film and an effect of permeability is increased, this case can have a high brightness enhancement more effective.

Hereinafter, more detailed look at with respect to the low refractive index polymer resin and the hollow particles contained in the coating composition for forming the primer layer.

First, the as being low refractive index polymer resin is contained in the coating composition to the excellent adhesion obtained and the anti-reflection effect improvement of the primer layer and the protective film, a low refractive index polymer resin usable in the present invention include, but are not limited to , it can be exemplified polyurethane resin, acrylic resin, polyester resin or combinations of these, and the like.

On the other hand, low refractive index polymer resin such as the polyurethane-based resin, acrylic resin, polyester-based resins may be holy water-soluble, water-dispersible, organic solvent soluble or organic solvent dispersion. At this time, the organic solvent that can be used gender organic solvent soluble or organic solvent dispersion is not particularly limited, and the low refractive index and can dissolve or disperse the polymer resin, a surface that can be used in conventional coating processes organic solvents are all available .

On the other hand, the case that the refractive polymeric resin is water dispersible low refractive index polymer resin, and glass to lower the viscosity of the coating compared to the water-soluble, even in the case of coating the primer layer on the base film there is insufficient solvent resistance, such as acrylic films as compared to solvent-based without causing mechanical property degradation or the like surface defects caused by erosion of the solvent, there is an advantage that a uniform coating is possible. In addition, the environmentally-friendly and production of the film does not require a separate explosion-proof equipment-has the advantage that can be coated with a line (in-line).

On the other hand, the polyurethane resin can be obtained by reacting a polyol and a polyisocyanate. Examples of the polyols do as long as it is not particularly limited having a hydroxyl group in the molecule two or more, there may be employed any suitable polyol. For example, the polyol can be used in combination with polyester polyols, polycarbonate diols, polyether polyols, and the like, at least one or more alone or two or more selected from the group consisting of.

The polyester polyols typically may be obtained by reacting a polybasic acid component and a polyol component. As the polybasic acid component, for example ortho (ortho) - phthalic acid, isophthalic acid, terephthalic acid, 1,4-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, a non- phenyl-dicarboxylic acid, tetrahydrophthalic acid and aromatic dicarboxylic acids; Oxalic acid, succinic acid, malonic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, and linoleic acid, maleic acid, fumaric acid, mesaconic acid, itaconic acid, an aliphatic dicarboxylic acid; Hexahydrophthalic acid, tetrahydrophthalic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexane dicarboxylic acid, such as alicyclic dicarboxylic acids; Or the like can be mentioned acid anhydrides thereof, alkyl esters, acid halides such as the reactive derivative. These may be used alone or in combination of two or more. Further, the polyol is ethylene glycol, 1,2-propanediol on-diol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, pentyl glycol, borneol, pentanediol, 1,6-hexanediol, 1 , 8-octanediol, 1,10-decanediol, 4,4-dihydroxy-phenylpropane, 4,4'-hydroxymethyl methane, diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, 1,4-cyclohexanedimethanol, 1,4-cyclohexanediol, bisphenol A, bisphenol F, glycerol, 1,1,1-trimethylolpropane, 1,2,5-hexahydro-triol, penta Erie triol, preferably at least one member selected from glucose, sucrose, and the group consisting of sorbitol.

The polycarbonate diol is preferably all-die aliphatic polycarbonate. Polyurethane resin synthesized in these aliphatic polycarbonate diol is advantageous to implement the anti-reflection effect due to excellent mechanical properties as well as water resistance, oil resistance and long-term weather resistance is excellent, in particular, have a low refractive index compared to the aromatic group. On the other hand, as the aliphatic polycarbonate diol is, this but are not limited, for example, poly, and the like (hexamethylene carbonate) glycol, poly (cyclohexane carbonate) glycol. These compounds can be used singly or in combination of two or more.

The polyether polyols typically may be obtained by ring-opening polymerization of a polyhydric addition of an alkylene oxide to alcohol. As the polyhydric alcohol for example ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, and trimethylolpropane. These compounds can be used singly or in combination of two or more.

The polyisocyanate is not limited if the compound having two or more NCO, for example, toluene diisocyanate (TDI), 4,4- diphenylmethane diisocyanate (MDI), 1,5- naphthalene diisocyanate (NDI), Tolly dindi diisocyanate (TODI), hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), p- phenylene diisocyanate, 1,4-diisocyanate, Xi diisocyanate (XDI), etc. alone or two or more of to be used in combination.

On the other hand, production method of the polyurethane-based resin may employ any suitable method known in the art. Specifically, there may be mentioned a multi-stage method in which a one-shot method, the stepwise reaction of reacting the above components at a time. Further, in the production of the polyurethane-based resin may be used any suitable urethane reaction catalyst. On the other hand, when the polyurethane-based resin is a water-dispersible, it is preferable to manufacture by a multi-stage process in order to facilitate introduction of a hydrophilic group such as a carboxyl group.

On the other hand, in the production of the polyurethane-based resin, in addition to the above components can be reacted to other polyols, and / or other chain extender. As another polyol, for example the number of hydroxyl groups such as sorbitol, glycerin, trimethylolethane, trimethylolpropane, pentaerythritol can be given three or more polyols. Further, as the other chain extender, for example, ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, pentanediol, 1, 6 - hexanediol, glycols such as propylene glycol; Ethylene diamine, propylene diamine, hexamethylene diamine, 1,4 butane diamine, an aliphatic diamine, such as the aminoethyl kanol amine; An alicyclic diamine such as isophorone diamine, 4,4'-dicyclohexylmethane diamine; Xylene, and the like tolylene diamine, aromatic diamines such as tolylenediamine.

On the other hand, if the polyurethane-based resin may be used for neutralizing agent when moisture adult. By using a neutralizing agent it can be improved the stability of the polyurethane-based resin in the water. As the neutralizing agent, for example there may be mentioned ammonia, N- methylmorpholine, triethylamine, dimethyl ethanolamine, methyl diethanolamine, triethanolamine alkynyl, morpholine, tripropylamine, ethanolamine, triisopropanolamine and the like. These compounds can be used singly or in combination of two or more.

On the other hand, preferably in the production of the polyurethane-based resin is used an organic solvent which is inert and commercial water with respect to the polyisocyanate. Art the organic solvent is an ester solvent such as ethyl acetate, ethylcellosolve acetate and the like; Ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone; Dioxane tetrahydro may be mentioned ether solvents such as tetrahydrofuran. These compounds can be used singly or in combination of two or more.

On the other hand, the polyurethane resin is preferably 10,000 to all people having a weight average molecular weight of 100. If the molecular weight is less than 10,000 has an adhesion problem, if it exceeds 1,000,000 it is difficult to manufacture a polyurethane resin.

On the other hand, when the polyurethane-based resin is a water-dispersible it is preferably comprises a carboxyl group. If included in the polyurethane resin is a carboxyl group, to form the anion in the manufacture of polyurethane based resin, and that dispersed in water, and thus serves to increase the adhesion. Polyurethane-based resin containing the carboxyl group include, for example, in addition to the polyol and a polyisocyanate can be obtained by reacting a chain extender having a free carboxyl group. A chain extender having a carboxyl group may be mentioned di-hydroxycarboxylic acids, dihydroxy-succinic acid. Dihydroxy carboxylic acid, for example, include dimethylolpropionic acid, dimethyl olbu acid, dimethylol propionic acid, dimethylol butyric acid, dimethyl dialkyl olpen all acids including a dimethylol alkanoic acid such as carbonic acid. These may be used alone or in combination of two or more.

The acrylic resins usable in the low refractive index polymer resin can be prepared by polymerizing an acrylic monomer, at this time, it is preferable that a glass transition temperature of use higher than the acrylic monomer at room temperature. This include, but are not limited thereby but are, for example, there may be mentioned methyl methacrylate, ethyl methacrylate, isobutyl methacrylate and mixtures thereof. It is also possible to use a mixture of one or more lower acrylic monomer than the room temperature, the glass transition temperature, such as methoxy in order to improve adhesion and coating film physical properties ethoxyethyl amino acrylate, butyl acrylate, hexyl acrylate, ethylhexyl acrylate.

In addition, when the acrylic resin is a water-soluble or water-dispersible include may include at least one kind of water-soluble acrylic monomers such as hydroxyethyl acrylate, hydroxyethyl acrylamide, meth may acrylic acid or the like mixtures thereof.

The low-refractive system as much as possible the polyester used as the polymer resin, the resin can be produced by polymerization by a polyol with a dicarboxylic acid in the esterification method may, or polyol with a dicarboxylic acid diester to be manufactured by polymerization by the ester exchange method is.

As the dicarboxylic acid or dicarboxylic acid diester is not particularly limited, it is possible to use a raw material of a general polyester resin. For example, aliphatic dicarboxylic acids, alicyclic dicarboxylic acids, aromatic dicarboxylic acids and those of the di-ester form, such as may be used either individually or in combination of two or more, an acid anhydride to form an ester, the acid halide can be also used, such as. Further, when the polyester resin is a water-dispersible, you may use an isophthalic acid substituted with the sulfonic acid salt with a dicarboxylic acid.

On the other hand, the polyester resin, as needed, by copolymerizing the acrylic monomer component additionally, it may be a polyester acrylic resin which comprises an acrylic ester unit with a unit. The acrylic monomers used in the present invention include, for example, alkyl (meth) acrylate, an alkyl acrylate, an epoxy (meth) acrylate, hydroxy alkyl acrylate, alkyl (meth) acrylate, an alkyl acrylate including a carboxyl group, It may be at least one member selected from the group consisting of acrylate, including acid salt.

On the other hand, low refractive index polymer resin used in the present invention is preferable to a particular refractive index among the above-described low refractive index polymer resin used is not more than 1.55, it is more preferable to use a refractive index of 1.53 or less to 1.50 or less. When using a low refractive index polymer resin that satisfies the above-described range it is because it can be implemented more efficiently antireflection effect.

Next, the hollow fine particles is the refractive index of the primer layer to be included in the coating composition in order to lower the refractive index of 34 to maximize the anti-reflection properties, the hollow fine particles is the low refractive index polymer resin and mixed with a primer layer 34 is used without limitation so long as it can be lowered to the above-described range can be a. For example, but are not limited thereto, the hollow fine particles may be organic fine particles such as silica-based, aluminum-based, or inorganic fine particles such as titanium oxide-based, acryl-based, silicone-based, polystyrene-based oxide.

On the other hand, the hollow fine particles is inter alia particularly preferably hollow silica. When using the hollow silica is mixed with a low refractive index polymer resin, because the effect of lowering the refractive index of the primer layer 34 is very good. In this case, the hollow silica particles, may be a crystalline or non-crystalline particles, particularly preferably monodisperse particles. Further, one when considering the shape, spherical particles are the most preferred, it is possible to use particles of irregular shapes without problems. In addition, the hollow silica can be used that subjected to a silane coupling agent surface treatment, in this case, thereby improving the dispersibility of the solvent is involved in the curing process, cured to improve the durability of the coating layer via a network formed of a binder . Meanwhile, the method for producing the hollow silica is not particularly limited, and can be easily prepared by the method known in the art.

On the other hand, the refractive index of the hollow fine particles is preferably 1.40 or less, for example, can be on the order of about 1.17 to 1.35, or 1.17 to 1.30. The refractive index is not to mean refractive index, i.e. a refractive index of the outer frame to form a hollow particle of the fine particles, to mean the refractive index of the entire particles. If the refractive index of the hollow fine particles is larger than the above range, there can be implemented an anti-reflection characteristics of the present invention desired.

Further, the void ratio is preferably in the range of 10 to 60% in the hollow fine particles, more preferably in the range of 20 to 60%, and most preferably in the range of 30 to 60%. When satisfying the above range can realize an excellent antireflection property than.

Further, it is the average particle size of the hollow fine particles is preferably 10 to 200㎚ and more preferably, 30 to 80㎚. Is within the average particle size of the hollow fine particles range described above, the production of a transparent film, it is possible because of the scattering of light in the visible region does not occur.

On the other hand, the hollow fine particles is preferably comprises of 10 to 300 parts by weight with respect to the low dispersion polymeric resin 100 parts by weight, it is more preferable that an amount of 40 to 200 wt. When the amount of the hollow fine particles fall within the above range it can be achieved preferably the refractive index control is possible, and anti-reflection characteristics of the primer layer (34).

On the other hand, the hollow fine particles may holy water-soluble, water-dispersible, organic solvent soluble or organic solvent dispersion. More specifically, the case of using the low refractive index polymer resin, a water-soluble or water-dispersible low refractive index polymer resin, it is preferable to use a water-soluble or water-dispersible hollow fine particles, wherein the low refractive index polymer resin, an organic solvent soluble or organic solvent dispersible when using a low refractive index polymer resin, it is preferable to use an organic solvent soluble or organic solvent dispersible hollow fine particles.

2. The upper polarizer

Next, explanation will be given regarding the upper polarizing plate 10 used in the liquid crystal display device of the present invention will be in view.

The upper polarizing plate 10 of the present invention can be used without limitation as long as it is generally used in a liquid crystal display device, and the structure is for example a protective film / polarizer, the polarizer / protective film or protective film / polarizer / protective film may be a .

In this case, the polarizer is used for the upper polarizing plate 10 can be used without limitation that is known in the film and the art as consisting of a polyvinyl alcohol containing iodine or a dichroic dye and the manufacturing method it is also not particularly limited .

Further, the protection used for the upper polarizing plate 10, the film is an acrylic film, a polyethylene terephthalate (PET) films, triacetyl cellulose (TAC) film, poly-norbornene (PNB) film, cyclo olefin polymer (COP) film, poly carbonate, and the like (PC) film, and especially an acrylic film is preferred. Specific information on the acrylic film are as described above.

On the other hand, adhesion of the polarizer and the protective film is a roll coater, a gravure coater, a bar coater, a knife coater or capping after capillary coater coating an adhesive to the surface of polarizer or protective film using, laminated heating them laminating roll, or It may be performed by a method of room temperature compression bonding by lamination. On the other hand, the adhesive may be used without the glue used in the art, for example, a polyvinyl alcohol-based adhesive, a polyurethane-based adhesive, an acrylic adhesive, a cationic or radical-based UV adhesive or the like limits.

On the other hand, the upper polarizing plate 10 of the present invention may contain a retardation film for compensation period to the optical phase difference generated in the liquid crystal cell 20. In this case, the structure may be for example a protective film / polarizer / protective film / or the like the retardation film. At this time, the available retardation film in the present invention is not particularly limited, and a phase difference film which is generally used in the art based on various liquid crystal mode of the liquid crystal display device may be used.

3. The liquid crystal cell

Next, to explain about the liquid crystal cell 20 used in the liquid crystal display of the present invention will be in view.

The liquid crystal cell 20 of the present invention and can be used without limitation as long as it is generally used in a liquid crystal display device, the structure is for example a transparent substrate / color filter / protection film / transparent conductive electrode / orientation layer / liquid crystal / orientation layer / thin film It may be a transistor / and the transparent substrate. On the other hand, the liquid crystal may be used in various modes, for example, Double Domain TN (Twisted Nematic), ASM (axially symmetric aligned microcell), OCB (optically compensated blend), VA (vertical alig㎚ent) the liquid crystal cell 20, such as MVA (multidomain VA), SE (surrounding electrode), PVA (patterned VA), IPS (in-plane switching), FFS (fringe-field switching) mode may be used.

On the other hand, in the liquid crystal display of the present invention, the adhesion of the liquid crystal cell 20 and polarizing plates 10 and 30 a is not particularly limited, and can be attached in a manner commonly used in the art.

4. The backlight unit

Next, explanation will be given regarding the back light unit 40 used in the liquid crystal display device of the present invention will be in view.

The backlight unit 40 of the present invention may be used without limitation as long as it is generally used in a liquid crystal display device, for example, it may comprise a light source and a plurality of optical films. At this time, the backlight has a light source used in the unit 40 can be used a variety of light sources, such as cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a light emitting diode (LED), a surface light source lamp (FFL), etc. this may be used. Further, as the optical film may be used without the prism sheet, a diffusion film, a light guide plate, a diffusion plate, a reflection film is well-known the art optical film of the backlight unit in the art, such as restriction.

Hereinafter the present invention will be described in more detail through specific examples.

Preparation 1 - Primer layer coating solution

(1) A primer layer coating solution

Dispersed polyurethane resin (aliphatic polycarbonate diol type, ㈜ light-paint-PUD CK-PF, solid content of 30%, refractive index 1.50) 2.53g, dispersion of hollow silica (Japanese ilhwi catalytic chemical conversion (JGC) 社, solid content 8.8%, refractive index 1.29) by mixing 3.45g, pure 14.01g to prepare a total solids content of 5% in the coating solution a (dispersion of polyurethane resin 100 parts by weight of hollow silica dispersion, 30 parts by weight) per.

(2) a primer layer coating liquid B

Dispersed polyurethane resin (aliphatic polycarbonate diol type, ㈜ dimming paint CK-PUD-PF: solid content of 30%, refractive index 1.50) 2.33g, dispersion of hollow silica (Japanese ilhwi catalytic chemical conversion (JGC) 社, solid content 8.8%, refractive index 1.29) by mixing 3.18g, pure 14.48g to prepare a total solids content of 5% in the coating liquid B (aqueous dispersion of polyurethane resin 100 parts by weight of hollow silica dispersion, 40 parts by weight) per.

(3) the primer layer coating liquid C

Dispersed polyacrylonitrile / polyester resin (TAKAMATSU 社, solid content of 30% in Japan, refractive index 1.50) 2.33g, dispersion of hollow silica (社, solid content 8.8%, Japanese ilhwi catalytic chemical conversion (JGC), refractive index 1.29) to 3.18g, pure 14.48g It was mixed to prepare a total solids content of 5% in the coating solution C (dispersion of polyacrylonitrile / polyester resin 100 parts by weight of hollow silica dispersion, 30 parts by weight per).

4, the primer layer coating liquid D

It was prepared a dispersion of polyurethane resin (aliphatic polycarbonate diol type, ㈜ light-paint-PUD CK-PF, solid content of 30%, refractive index 1.50) 3.33g, a mixture of pure water 16.67g The total solid content of 5% in the coating solution D.

5, the primer layer coating liquid E

Can prepare a silicone-modified polyurethane resin dispersion (TEGO 社, SILICOPUR-808, solid content of 33%, refractive index 1.47), the coating solution E by mixing 3.03g, pure water 16.97g The total solid content of 5%.

6, the primer layer coating liquid F

Dispersed polyurethane resin (aliphatic polycarbonate diol type, ㈜ light-paint-PUD CK-PF, solid content of 30%, refractive index 1.50) 3.33g, dispersion of silica (RANCO 社, solid content 20%), a mixture of 15.67g of pure the total solid content to prepare a coating solution of 5% F.

Preparation 2 - adhesive composition

3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate (Celloxide 2021P Dicel 社) 20g, 1,4- cyclohexanedimethanol diglycidyl ether 20g, 3- ethyl-3 - [(3 -ethyl oxetane-3-yl) methoxymethyl] the oxetane (Toagosei 社 oxt-221) 45g, triaryl sulfonium hexafluoro-adhesive composition to the phosphate (Dow Chemical 社 UVI-6992) was prepared by adding 5g.

Example 1

Poly (cyclohexylmaleimide -co- methylmethacrylate-laid) (㈜LGMMA PMMA830HR) of after using the T- die block under the 250 ℃, 250rpm conditions resin to prepare a non-stretched acrylic film having a width of 800mm, 135 ℃ at a temperature in the MD direction it was stretched 1.8 times. The above-mentioned acrylic film stretched in the MD direction were subjected to corona treatment under the condition of 50 W / m 2 / min. That was dried over # 3 Meyer bar (Mayer bar) for 3 min at 90 ℃ hot air and then coating the primer layer coating liquid A prepared above. Finally, 2.4 times stretched in the TD direction at a temperature of 135 ℃, to prepare an acryl-based protective film (thickness 50 ㎛) including a primer layer on one surface of 300㎚ thickness.

Prepared above was applied to the prepared adhesive composition to the reverse side of the surface primer layer is formed of an acrylic protective film polarizer (PVA devices), a multilayer, and the polarizer (PVA devices), the opposite surface is coated with the above-prepared adhesive composition was then laminated to a retardation film (Konica 社 K10) for VA through the next, after setting the condition that the thickness of the final adhesive layer so that the 1 ~ 2㎛, laminator (5m / min). Then, using these, UV irradiator (Metal halide lamp), to thereby prepare a polarizing plate is irradiated with ultraviolet rays of 1000mJ / cm 2.

Example 2

In the first embodiment, a polarizing plate was prepared in the same manner except in place of the primer layer coating liquid A was used for the primer layer coating liquid B.

Example 3

In the first embodiment, a polarizing plate was prepared in the same manner except in place of the primer layer coating liquid A was used for the primer layer coating liquid C.

Comparative Example 1

In the first embodiment, a polarizing plate was prepared in the same manner except in place of the primer layer coating liquid A was used for the primer layer coating liquid D.

Comparative Example 2

In the first embodiment, a polarizing plate was prepared in the same manner except in place of the primer layer coating liquid A was used for the primer layer coating liquid E.

Comparative Example 3

In the first embodiment, a polarizing plate was prepared in the same manner, except that the primer layer coating liquid F in place of the primer layer coating liquid A.

Experimental Example 1

To measure the above Examples and Comparative Examples The refractive index of the prepared polarizing plate at a reflectance, transmittance, haze value, coefficient of static friction, and the dynamic friction coefficient are shown in Table 1 below. Measurement is as follows:

1. Refractive index: applying the above coating liquid was dried by Meyer bar # 20 on the organic board, and one minute at 140 ℃, the prism increases with the Fuller (. SARION TECHNOLOGY, INC SPA-3DR) the refractive index by the average value was measured three times It was measured.

2. reflectance: given the primer layer on the back side is introduced a protective film backsheet (black PET film), using a spectral color system side (KONICA MINOLTA 社 CM-2600d) was measured as an average value of reflectance was measured three times.

3. transmittance: Using a primer layer a haze meter (HM-150) for the introduction of the protective film was measured by the average permeability was measured three times. The light source is a D65, transmission specifications were compliant with JTS K 7361.

4. The polarizing plate transmission: using a JASCO (V-7100) was measured as the average transmission rate polarizing plate was measured three times.

5. Haze: Using a haze meter the introduction of the protective film a primer layer (HM-150) was measured as the average permeability was measured three times. The light source is a D65, transmission specifications were compliant with JTS K 7361.

6. The static friction coefficient: After placing a primer layer is to fix the introduction of a protective film (10x20cm) to the friction coefficient measuring instrument (FP-2260), place the sled of the non-coated protective film (6x6cm) attached to 20g, the sled 15.0 cm / min at a rate of pulling 8cm, and the average value as a coefficient of static friction is measured three times the maximum value in the initial 1cm total of 8cm section.

7. The dynamic friction coefficient: according to the coefficient of static friction measured, and the measured three times and the average value of the average value after the initial 1cm from the 8cm interval measured by the dynamic friction coefficient.

Table 1

division The refractive index reflectivity(%) Transmittance (%) Polarizer transmission (%) Haze (%) Static friction coefficient Dynamic friction coefficient
Example 1 1.47 2.62 93.6 43.64 0.3 0.53 0.48
Example 2 1.45 2.33 93.9 43.92 0.4 0.54 0.47
Example 3 1.47 2.36 93.6 43.66 0.3 0.55 0.46
Comparative Example 1 1.50 4.10 92.3 43.17 0.2 1.10 0.85
Comparative Example 2 1.48 3.23 92.8 43.44 0.5 1.22 0.90
Comparative Example 3 1.49 3.85 92.4 43.22 0.3 0.52 0.46

As can be seen in Table 1, a primer layer is included in the high-brightness polarizing plate of the present invention and a refractive index of less than 1.48, the reflectance is not more than 3.5%, and the transmittance is 93% or more, all of the further static friction coefficient and dynamic friction coefficient of 0.8 or less, it can be seen that all of the anti-reflective properties and excellent anti-blocking properties.

On the other hand, the primer layer of the comparative example 1 it can be seen that all the properties such as the bar, the refractive index, reflectance, transmittance, coefficient of friction, comprising a binder but poor. In addition, a primer layer of Comparative Example 2 is a case of using a binder resin having a lower refractive index, the refractive index, reflectance transmittance of the primer layer, but can be lowered to some degree, still can be seen that the poor anti-blocking properties. In addition, a primer layer of Comparative Example 3 it can be seen that the anti-blocking bar comprising silica castle poor excellent one, anti-reflection characteristics.

Experimental Example 2

When applied to a polarizing plate in the normal state without a primer layer In order to examine whether the improved practice brightness effect when applying the polarizing plate of the present invention prepared in Example on the lower polarizing plate to the lower polarizing plate to measure the contrast relative luminance rate It is shown in Table 2 below. More specifically, after attaching the polarizers prepared in Examples and Comparative Examples on a back light unit (BLU) to liquid crystal cell (CMI 社, 31.5 in.) To the primer layer is adjacent to the backlight unit, the brightness measuring camera in the darkroom environment (Topcon 社, SRUL 1R) were compared to evaluate the degree of rise measurement of the standard state by measuring the white luminance without a primer layer (white luminance 430) used.

Table 2

division A luminance increase rate (%)
Example 1 1.52
Example 2 1.78
Example 3 1.54

As it can be seen from Table 2, when applying the polarizing plate of the present invention to the lower polarizer plate when applying the conventional general polarizing plate without a primer layer on a backlight-unit-side protective film than 1.5% in a simple way without the need for brightness enhancement film it can be seen that to improve the brightness or more.

Although detailed description will be given of an embodiment of the present invention at least the scope of the present invention, this limited rather, various changes and modifications may be that it is the art may be made without departing from the scope of the invention as set forth in the claims it will be apparent to those skilled in the art.

Reference Numerals

10: upper polarizing plate

20: liquid crystal cell,

30: high-brightness polarizing plate

31: Liquid crystal cell side protective film

32: polarizer

33: Backlight unit-side protective film

34: Primer layer

40: back light unit

41: light emitted from the backlight unit

Claims (15)

  1. Polarizer; And
    The high-brightness polarizing plate comprising the protective film disposed on one side of the polarizer,
    The protective film has a high brightness and polarizing plates disposed so as to face the backlight unit, to the primer layer to the surface opposite to the surface facing the polarizer comprises a low refractive index polymer resin and the hollow fine particles is formed.
  2. According to claim 1,
    The high-brightness polarizing plate is a polarizing plate of high luminance lower polarizing plate of the liquid crystal display device.
  3. According to claim 1,
    The primer layer has a refractive index of 1.48 or less high luminance polarizer.
  4. According to claim 1,
    The primer layer is a high-intensity polarizer static friction coefficient of 0.8 or less.
  5. According to claim 1,
    The primer layer is 0.8 or less high brightness polarizing plate and the dynamic friction coefficient.
  6. According to claim 1,
    The hollow fine particles are hollow silica of high-brightness polarizing plate.
  7. According to claim 1,
    The hollow fine particles is the refractive index of the high luminance polarizing plate of 1.17 to 1.40.
  8. According to claim 1,
    The hollow fine particles of high-brightness polarizing plate have an average particle size of 10 to 200㎚.
  9. According to claim 1,
    The hollow fine particles of high-brightness polarizing plate will be an amount of 10 to 300 parts by weight per 100 parts by weight of the low refractive index polymer resin.
  10. According to claim 1,
    The low refractive index polymer resin is a polyurethane resin, an acrylic resin, a polyester resin or a high-intensity polarizer combination thereof.
  11. According to claim 1,
    The refractive index of the low refractive index polymer resin is 1.55 or less high luminance polarizer.
  12. According to claim 1,
    The high-brightness polarizing plate thickness of the primer layer is 10 to 500㎚.
  13. According to claim 1,
    The reflectance of the protective film is 3.5% or less, high-intensity polarizer.
  14. According to claim 1,
    Permeability of the protective film is not less than 93% high-intensity polarizer.
  15. A liquid crystal cell;
    An upper polarizer provided on the upper part of the liquid crystal cell;
    A lower polarizer provided on the lower layer portion of the liquid crystal cell; And
    Includes a back light unit that is provided in the lower part of the lower polarizing plate,
    The lower polarizing plate of claim 1 to claim 14 any one of the high-brightness polarizing plate of the liquid crystal display apparatus of the claims.
PCT/KR2014/006752 2013-07-26 2014-07-24 High-luminance polarizing plate and liquid crystal display device including same WO2015012617A1 (en)

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KR20140093138A KR101692109B1 (en) 2013-07-26 2014-07-23 High brightness polarizing plate and liquid crystal display device comprizing the same

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CN 201480000974 CN104487876B (en) 2013-07-26 2014-07-24 High brightness and a liquid crystal polarizing plate comprising the polarizing plate of the display device of high luminance
US14389681 US20160266293A1 (en) 2013-07-26 2014-07-24 High brightness polarizing plate and liquid crystal display device including the same
JP2016525305A JP6216049B2 (en) 2013-07-26 2014-07-24 The liquid crystal display device

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6368699B1 (en) * 1995-06-26 2002-04-09 3M Innovative Properties Company Multilayer polymer film with additional coatings or layers
JP2003149413A (en) * 2001-08-28 2003-05-21 Fuji Photo Film Co Ltd Light diffusing film, antidazzle film, polarizing plate and liquid crystal display device
KR20050108239A (en) * 2004-05-12 2005-11-16 제일모직주식회사 Light diffusing film having excellent anti-refraction ability and backlight unit using the same
KR20120071745A (en) * 2010-12-23 2012-07-03 동우 화인켐 주식회사 Method for preparing liquid display device
KR20120107256A (en) * 2011-03-21 2012-10-02 동우 화인켐 주식회사 Polarizing plate and liquid crystal display device comprising the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6368699B1 (en) * 1995-06-26 2002-04-09 3M Innovative Properties Company Multilayer polymer film with additional coatings or layers
JP2003149413A (en) * 2001-08-28 2003-05-21 Fuji Photo Film Co Ltd Light diffusing film, antidazzle film, polarizing plate and liquid crystal display device
KR20050108239A (en) * 2004-05-12 2005-11-16 제일모직주식회사 Light diffusing film having excellent anti-refraction ability and backlight unit using the same
KR20120071745A (en) * 2010-12-23 2012-07-03 동우 화인켐 주식회사 Method for preparing liquid display device
KR20120107256A (en) * 2011-03-21 2012-10-02 동우 화인켐 주식회사 Polarizing plate and liquid crystal display device comprising the same

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