KR20220115599A - liquid crystal panel - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a liquid crystal panel capable of improving visibility of a liquid crystal display device while preventing display defects due to charging of the liquid crystal display device. The liquid crystal panel of the present invention has an antireflection film 10 , a polarizing film 20 , and an adhesive layer 30 in this order in the lamination direction, and a polarizing film 15 with an antireflection film further having a conductive layer 40 . ) and a liquid crystal cell 25 . A conductive layer is not provided between the polarizing film with an antireflection film and a liquid crystal cell. The surface resistivity of the conductive layer which the polarizing film with antireflection film has is 1.0x10 ⁶ ohm/square or less. The polarizing film with an antireflection film has a luminous reflectance Y when light from the CIE standard light source D65 is incident from the surface opposite to the pressure-sensitive adhesive layer in a state in which the pressure-sensitive adhesive layer is laminated with alkali-free glass so that the pressure-sensitive adhesive layer is in direct contact with the alkali-free glass. 1.1% or less of reflected light is generated.

Description

liquid crystal panel

The present invention relates to a liquid crystal panel.

A liquid crystal display device is equipped with the liquid crystal panel which has a structure in which a polarizing film is arrange|positioned on the visual recognition side rather than a liquid crystal cell, for example, and the illumination system which irradiates light to a liquid crystal panel. A liquid crystal display device displays an image by applying a voltage to a liquid crystal cell and adjusting the orientation of the liquid crystal molecule contained in a liquid crystal cell.

In a liquid crystal display device, static electricity is generated at the time of manufacture, for example, when bonding a polarizing film to a liquid crystal cell via an adhesive layer, or when using, for example, when a user contacts a liquid crystal display device. This static electricity may cause the liquid crystal display to be charged. When the liquid crystal display device is charged, the alignment of liquid crystal molecules included in the liquid crystal cell may be disturbed, and display defects may occur. In order to prevent the display defect by charging of a liquid crystal display device, it is known, for example to arrange|position an ITO (indium tin oxide) layer on the surface of the liquid crystal cell by the side of a polarizing film.

However, the said ITO layer may be abbreviate|omitted from a viewpoint of cost etc. For example, an ITO layer is not arrange|positioned on the surface of the liquid crystal cell by the side of a polarizing film by patent document 1 and 2, but the liquid crystal panel in which the polarizing film with an adhesive layer is in direct contact with a liquid crystal cell is disclosed.

International Publication No. 2018/181477 Japanese Patent No. 5679337 Publication

When the liquid crystal display device in which the ITO layer is not disposed on the surface of the liquid crystal cell on the polarizing film side is used in an environment where static electricity is particularly likely to occur, for example, in an environment where other electronic devices are present, such as inside a vehicle. Therefore, it is difficult to sufficiently prevent display defects due to charging. Moreover, good visibility is calculated|required from a viewpoint of safety|security, when a liquid crystal display device is used as an on-vehicle display, for example.

Then, an object of this invention is to provide the liquid crystal panel which can improve the visibility of a liquid crystal display device while preventing the display defect by charging of a liquid crystal display device.

The present invention is

A polarizing film with an antireflection film which has an antireflection film, a polarizing film, and an adhesive layer in this order in a lamination direction, and further has a conductive layer;

liquid crystal cell

to provide

A conductive layer is not provided between the polarizing film with an antireflection film and the liquid crystal cell,

The surface resistivity of the conductive layer of the polarizing film with an antireflection film is 1.0×10 ⁶ Ω/□ or less,

When the polarizing film with an antireflection film is in a state in which the pressure-sensitive adhesive layer is laminated with the alkali-free glass so that the pressure-sensitive adhesive layer is in direct contact with the alkali-free glass, light from the CIE standard light source D65 is incident from the surface opposite to the pressure-sensitive adhesive layer, A liquid crystal panel that generates reflected light having a luminous reflectance Y of 1.1% or less is provided.

Advantageous Effects of Invention According to the present invention, it is possible to provide a liquid crystal panel capable of preventing display defects due to charging of the liquid crystal display and improving the visibility of the liquid crystal display.

1 is a cross-sectional view of a liquid crystal panel according to an embodiment of the present invention.
2 is a cross-sectional view showing an example of an antireflection film.
3 is a cross-sectional view showing another example of the antireflection film.
4 is a cross-sectional view showing a modified example of the liquid crystal panel.
5 is a cross-sectional view showing another modified example of the liquid crystal panel.
It is a graph which shows the relationship between the a ^* value and b ^* value of the reflected light from the polarizing film with an antireflection film of an Example and a comparative example.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail, but the following description is not intended to limit the present invention to specific embodiments.

(Embodiment of liquid crystal panel)

As shown in FIG. 1 , the liquid crystal panel 100 of the present embodiment includes a polarizing film 15 with an antireflection film and a liquid crystal cell 25 . A conductive layer, for example, an ITO layer is not provided between the polarizing film 15 with an antireflection film and the liquid crystal cell 25 , and the polarizing film 15 with an antireflection film is in direct or indirect contact with the liquid crystal cell 25 , have. Between the polarizing film 15 with an antireflection film and the liquid crystal cell 25, other layers other than a conductive layer may be arrange|positioned in the range which does not impair the effect of this invention. The polarizing film 15 with an antireflection film further has the conductive layer 40 while having the antireflection film 10, the polarizing film 20, and the adhesive layer 30 in this order in a lamination|stacking direction. The conductive layer 40 is arrange|positioned between the polarizing film 20 and the adhesive layer 30, and is in contact with each of the polarizing film 20 and the adhesive layer 30, for example. When the conductive layer 40 is arrange|positioned between the polarizing film 20 and the adhesive layer 30, there exists a tendency for deterioration of the conductive layer 40 to be suppressed. However, the conductive layer 40 may be arrange|positioned other than between the polarizing film 20 and the adhesive layer 30, and may be arrange|positioned between the antireflection film 10 and the polarizing film 20, for example.

In the polarizing film 15 with an antireflection film, the surface resistivity of the conductive layer 40 is 1.0x10 ⁶ ohm/square or less. The conductive layer 40 having such a low surface resistivity can prevent display defects due to charging of the liquid crystal display device including the liquid crystal panel 100 even in an environment in which static electricity is easily generated. The surface resistivity of the conductive layer 40 can be specified by the following method. First, a laminate in which the surface of the conductive layer 40 is exposed to the outside is prepared. As such a laminated body, the laminated body L which consists of the polarizing film 20 and the conductive layer 40 is mentioned, for example. Next, with respect to the surface of the conductive layer 40 in the prepared laminated body, the surface resistivity is measured. The measurement of surface resistivity can be performed based on the method prescribed|regulated to JISK7194:1994 or JISK6911:1995. As an example, when the surface resistivity of the conductive layer 40 is less than 1.0×10 ⁵ Ω/□, the surface resistivity of the conductive layer 40 is Loresta-GP MCP-T600 (manufactured by Mitsubishi Chemical Analytech). , can be measured in accordance with the method specified in JIS K7194:1994. When the surface resistivity of the conductive layer 40 is 1.0×10 ⁵ Ω/□ or more, the surface resistivity of the conductive layer 40 is JIS K6911 using Hirestar-UP MCP-HT450 (manufactured by Mitsubishi Chemical Analytech). : It can be measured according to the method specified in 1995. The measured value obtained by the said measurement can be regarded as the surface resistivity of the conductive layer 40 in the polarizing film 15 with an antireflection film.

The surface resistivity of the conductive layer 40 is preferably 5.0×10 ⁵ Ω/□ or less, more preferably 1.0×10 ⁵ Ω/□ or less, and still more preferably 1.0×10 ⁴ Ω/□ or less. , particularly preferably 1.0×10 ³ Ω/□ or less. The lower limit of the surface resistivity of the conductive layer 40 is not particularly limited, and is, for example, 1.0×10 ² Ω/□. When the liquid crystal panel 100 is used in a liquid crystal display device having a touch sensor or a touch panel, the surface resistivity of the conductive layer 40 is from the viewpoint of sufficiently ensuring the sensitivity of the touch sensor or touch panel provided in the liquid crystal display device. may be larger than 5.0×10 ² Ω/□.

The polarizing film 15 with an antireflection film is in a state in which the pressure-sensitive adhesive layer 30 is laminated with alkali-free glass so that it is in direct contact with the alkali-free glass, and the light from the CIE standard light source D65 is on the opposite side to the pressure-sensitive adhesive layer 30 . When incident from (typically the surface of the antireflection film 10), reflected light having a luminous reflectance Y of 1.1% or less is generated. According to the polarizing film 15 with an antireflection film which generate|occur|produces such reflected light, reflection of the light in the liquid crystal panel 100 can be suppressed, and, thereby, the visibility of a liquid crystal display device can be improved. The luminous reflectance Y means the Y value of the tristimulus values (X, Y, and Z) in the XYZ color system (CIE1931). The tristimulus value is specified in detail in JIS Z8701:1999.

Specifically, the luminous reflectance Y can be specified by the following method. First, with the adhesive layer 30, the polarizing film 15 with an antireflection film is affixed to alkali free glass. Alkali-free glass is glass which does not contain an alkali component (alkali metal oxide) substantially, Specifically, the weight ratio of the alkali component in glass is 1000 ppm or less, for example, Furthermore, it is 500 ppm or less. Alkali-free glass is plate-shaped, for example, and has thickness 0.5 mm or more. Next, a black film is affixed on the surface of the alkali free glass on the opposite side to the surface bonded with the polarizing film 15 with an antireflection film. Next, the light from the CIE standard light source D65 is made incident on the surface of the polarizing film 15 with an antireflection film on the antireflection film 10 side at an incident angle of 5°. With respect to the spectral reflected light generated at this time, the spectral reflectance in the wavelength range of 360 nm to 740 nm can be specified, and the luminous reflectance Y in the XYZ color space system (CIE1931) can be specified from the spectral reflectance.

The luminous reflectance Y is preferably 1.0% or less, more preferably 0.9% or less, still more preferably 0.8% or less, and particularly preferably 0.7% or less. The lower limit of the luminous reflectance Y is not particularly limited, and is, for example, 0.1%.

Although the a ^* value and b ^* value in the L ^* a ^* b ^* color space system (CIE1976) of the said reflected light are not specifically limited, It is preferable that the following relational expressions (1) and (2) are satisfied.

The above a ^* values and b ^* values are calculated using the tristimulus values (X, Y, and Z) in the XYZ color system of the reflected light to the following formulas (i) and (ii) defined in JIS Z8781-4:2013. can be specified by

The a ^* value is preferably -6 or more and 6 or less, and more preferably -3 or more and 3 or less. The b ^* value is preferably -15 or more and 3 or less, more preferably -10 or more and 2 or less, still more preferably -6 or more and 2 or less, and particularly preferably -5 or more and 2 or less. In some cases, the a ^* value and the b ^* value may satisfy the following relational expressions (3) and (4).

In addition, the a ^* value and the b ^* value may satisfy|fill the following relational expressions (5) and (6).

The L ^* value of the reflected light is, for example, 12 or less, preferably 10 or less, more preferably 8 or less, and still more preferably 7 or less. The lower limit of the L ^* value is not particularly limited, and is, for example, three. L ^* value can be specified by the following formula (iii) prescribed|regulated by JIS Z8781-4:2013 using the said tristimulus value.

The color difference ΔE between light satisfying L ^* value=0, a ^* value=0 and b ^* value=0 (light with a completely neutral color) and the reflected light is, for example, 22 or less, preferably 18 or less , more preferably 15 or less, still more preferably 10 or less, and particularly preferably 8 or less. The lower limit of the color difference ΔE is not particularly limited, and is, for example, three. The color difference ΔE can be calculated based on the following formula (iv) using the L ^* value, a ^* value, and b ^* value of the reflected light.

[Anti-reflection film]

As shown in FIG. 2 , the antireflection film 10 includes a first high refractive index layer 1 , a first low refractive index layer 2 , a second high refractive index layer 3 , and a second low refractive index layer 4 . has in this order in the stacking direction. The first high refractive index layer 1 is in contact with the polarizing film 20 , for example. The second low-refractive-index layer 4 is, for example, located on the most visible side among these layers.

The high-refractive-index layers 1 and 3 are layers having a higher refractive index than the low-refractive-index layers 2 and 4, and the refractive index is in the range of, for example, 1.6 to 3.2. The refractive index of the first high refractive index layer 1 may be the same as or different from that of the second high refractive index layer 3 . In this specification, unless otherwise indicated, "refractive index" means a value measured in accordance with JIS K0062:1992 using light having a wavelength of λ=550 nm at a temperature of 25°C.

In one preferred embodiment of the present invention, the high refractive index layers 1 and 3 include, for example, a binder resin and inorganic fine particles dispersed in the binder resin. Binder resin is typically the hardened|cured material of ionizing-ray-curable resin, and more specifically, it is hardened|cured material of ultraviolet curable resin. As ultraviolet curable resin, the resin containing the polymer or oligomer which has a substituent which can radically superpose|polymerize, for example, (meth)acrylate resin is mentioned. The (meth)acrylate resin as the ultraviolet curable resin includes, for example, polymers or oligomers such as epoxy (meth)acrylate, polyester (meth)acrylate, acrylic (meth)acrylate, ether (meth)acrylate do. (meth)acrylate resin may further contain the radically polymerizable monomer (precursor) in addition to the said polymer or oligomer. The molecular weight of this monomer is 200-700, for example. As a specific example of this monomer, pentaerythritol triacrylate (PETA: molecular weight 298), neopentyl glycol diacrylate (NPGDA: molecular weight 212), dipentaerythritol hexaacrylate (DPHA: molecular weight 632), dipentaerythritol pentaacrylate (DPPA: molecular weight 578) and trimethylolpropane triacrylate (TMPTA: molecular weight 296) are mentioned. Ionizing-ray-curable resin may contain the initiator as needed. Examples of the initiator include UV radical generators (Irgacure 907, Copper 127, Copper 192, etc. manufactured by Ciba Specialty Chemicals) and benzoyl peroxide. The said binder resin may contain other resin other than the hardened|cured material of ionizing-ray-curable resin. A thermosetting resin may be sufficient as another resin, and a thermoplastic resin may be sufficient as it. As other resin, an aliphatic resin (for example, polyolefin), a urethane resin, etc. are mentioned.

The refractive index of binder resin is 1.40-1.60, for example. The blending amount of the binder resin is, for example, 10 parts by weight to 80 parts by weight, and preferably 20 parts by weight to 70 parts by weight with respect to 100 parts by weight of the high refractive index layer to be formed.

The material of the inorganic fine particles is, for example, a metal oxide. Specific examples of the metal oxide include zirconium oxide (zirconia) (refractive index: 2.19), aluminum oxide (refractive index: 1.56 to 2.62), titanium oxide (refractive index: 2.49 to 2.74), and silicon oxide (refractive index: 1.25 to 1.46). . These metal oxides are suitable for adjustment of the refractive index of the high refractive index layers 1 and 3 because not only light absorption is small, but also has a refractive index higher than organic materials such as ionizing ray-curable resins and thermoplastic resins. It is preferable that an inorganic fine particle contains a zirconium oxide or a titanium oxide.

The refractive index of the inorganic fine particles is, for example, 1.60 or more, preferably 1.70 to 2.80, and more preferably 2.00 to 2.80. The inorganic fine particles having a refractive index of 1.60 or more are suitable for adjusting the refractive index of the high refractive index layers 1 and 3 . The average particle diameter of the inorganic fine particles is, for example, 1 nm to 100 nm, preferably 10 nm to 80 nm, and more preferably 20 nm to 70 nm. The average particle diameter of the inorganic fine particles means a particle diameter (d50) corresponding to 50% of the cumulative volume in a particle size distribution measured by, for example, a laser diffraction particle size meter or the like.

Although the inorganic fine particles do not need to be surface-modified, it is preferable that the surface-modification is carried out. The surface-modified inorganic fine particles tend to be well dispersed in the binder resin. Surface modification is performed, for example by apply|coating a surface modifier to the surface of an inorganic fine particle, and forming a surface modifier layer. As a surface modifier, For example, coupling agents, such as a silane-type coupling agent and a titanate-type coupling agent; Surfactants, such as fatty acid type surfactant, are mentioned. When such a surface modifier is used, the wettability between the binder resin and the inorganic fine particles is improved, and the interface between the binder resin and the inorganic fine particles tends to be stabilized.

The blending amount of the inorganic fine particles is, for example, 10 parts by weight to 90 parts by weight, and more preferably 20 parts by weight to 80 parts by weight with respect to 100 parts by weight of the high refractive index layer to be formed. When the compounding amount of the inorganic fine particles is within the above range, the antireflection film tends to have sufficient mechanical properties and can sufficiently reduce the luminous reflectance Y of the reflected light.

The refractive indices of the high refractive index layers 1 and 3 containing binder resin and inorganic fine particles are, for example, 1.6 to 2.6, preferably 1.7 to 2.2.

In another preferred embodiment of the present invention, the high refractive index layers 1 and 3 contain a metal oxide or a metal nitride, and preferably substantially consist of a metal oxide or a metal nitride. Specific examples of the metal oxide include titanium oxide (TiO ₂ ), indium/tin oxide (ITO), niobium oxide (Nb ₂ O ₅ ), yttrium oxide (Y ₂ O ₃ ), indium oxide (In ₂ O ₃ ), and tin oxide. (SnO ₂ ), zirconium oxide (ZrO ₂ ), hafnium oxide (HfO ₂ ), antimony oxide (Sb ₂ O ₃ ), tantalum oxide (Ta ₂ O ₅ ), zinc oxide (ZnO), tungsten oxide (WO ₃ ) can be heard Specific examples of the metal nitride include silicon nitride (Si ₃ N ₄ ). The high refractive index layers 1 and 3 preferably include niobium oxide (Nb ₂ O ₅ ) or titanium oxide (TiO ₂ ). The refractive index of the high refractive index layer composed of a metal oxide or a metal nitride is, for example, 2.00 to 2.60, preferably 2.10 to 2.45.

The material of the first high refractive index layer 1 may be the same as or different from that of the second high refractive index layer 3 .

The physical film thickness of the first high refractive index layer 1 is, for example, 9 nm to 15 nm, preferably 11 nm to 13 nm. The optical film thickness of the first high refractive index layer 1 is, for example, 20 nm to 35 nm, preferably 25 nm to 30 nm. In addition, in this specification, the optical film thickness is a value represented by the product of the refractive index of light of wavelength 550nm, and the physical film thickness.

The physical film thickness of the second high refractive index layer 3 is, for example, 98 nm to 124 nm, preferably 111 nm to 120 nm. The optical film thickness of the second high refractive index layer 3 is, for example, 230 nm to 290 nm, preferably 260 nm to 280 nm.

The low-refractive-index layers 2 and 4 are layers having a lower refractive index than the high-refractive-index layers 1 and 3, and the refractive index is, for example, 1.35 to 1.55, preferably 1.40 to 1.50. By appropriately adjusting the difference in refractive index between the low-refractive-index layers 2 and 4 and the high-refractive-index layers 1 and 3, there is a tendency that light reflection can be suppressed. The refractive index of the 1st low-refractive-index layer 2 may be the same as that of the 2nd low-refractive-index layer 4, and may differ.

As a material of the low-refractive-index layers 2 and 4, a metal oxide and a metal fluoride are mentioned, for example. Silicon oxide (SiO2) is mentioned as a specific example _of a metal oxide. Specific examples of the metal fluoride include magnesium fluoride and fluorosilicic acid. As for the material of the low refractive index layers 2 and 4, magnesium fluoride and fluorosilicic acid are preferable from the viewpoint of refractive index, and silicon oxide is preferable from the viewpoint of ease of manufacture, mechanical strength, moisture resistance, etc., and various characteristics are comprehensively considered. Silicon oxide is preferred. The material of the 1st low-refractive-index layer 2 may be the same as that of the 2nd low-refractive-index layer 4, and may differ.

The material of the low-refractive-index layers 2 and 4 may be a cured product of curable fluorine-containing resin. The curable fluorine-containing resin has, for example, a structural unit derived from a fluorine-containing monomer and a structural unit derived from a crosslinkable monomer. Specific examples of the fluorine-containing monomer include fluoroolefins (fluoroethylene, vinylidene fluoride, tetrafluoroethylene, hexafluoroethylene, hexafluoropropylene, perfluoro-2,2-dimethyl-1 , 3-dioxol, etc.), (meth)acrylic acid ester derivatives having a partially or completely fluorinated alkyl group (Viscoat 6FM (manufactured by Yuki Chemical, Osaka), M-2020 (manufactured by Daikin Corporation), etc.), completely or partially and fluorinated vinyl ethers. As a crosslinkable monomer, For example, (meth)acrylate monomer which has a crosslinkable functional group in a molecule|numerator, such as glycidyl methacrylate; (meth)acrylate monomers ((meth)acrylic acid, methylol (meth)acrylate, hydroxyalkyl (meth)acrylate, allyl (meth)acrylate having a functional group such as a carboxyl group, a hydroxyl group, an amino group, and a sulfonic acid group etc.) can be mentioned. The fluorine-containing resin may have a structural unit derived from a monomer other than the above-mentioned compound (eg, an olefin-based monomer, a (meth)acrylate-based monomer, or a styrene-based monomer).

The physical film thickness of the first low refractive index layer 2 is, for example, 26 nm to 34 nm, preferably 27 nm to 31 nm. The optical film thickness of the 1st low-refractive-index layer 2 is 38 nm - 50 nm, for example, Preferably they are 40 nm - 45 nm.

The physical film thickness of the second low refractive index layer 4 is, for example, 68 nm to 88 nm, preferably 72 nm to 79 nm. The optical film thickness of the 2nd low-refractive-index layer 4 is 100 nm - 128 nm, for example, Preferably they are 105 nm - 115 nm.

The manufacturing method of a high refractive index layer and a low refractive index layer is not specifically limited. When these layers contain a resin, these layers can be formed by what is called a wet process (curing after apply|coating a resin composition). When these layers are composed of a metal oxide, metal fluoride, metal nitride or the like, these layers can be formed by a so-called dry process. Specific examples of the dry process include a PVD (Physical Vapor Deposition) method and a CVD (Chemical Vapor Deposition) method. Examples of the PVD method include a vacuum vapor deposition method, a reactive vapor deposition method, an ion beam assist method, a sputtering method, and an ion plating method. As CVD method, plasma CVD method is mentioned, for example. From a viewpoint of reducing the fluctuation|variation in the hue of reflected light, as a dry process, the sputtering method is preferable.

The antireflection film 10 of FIG. 2 may further have other members other than the high refractive index layer and the low refractive index layer. 3 shows another example of the antireflection film. The antireflection film 11 of FIG. 3 further has the base material 5 and the adhesive layer 6 . The base material 5 is arrange|positioned between the 1st high refractive index layer 1 and the polarizing film 20, and is in contact with the 1st high refractive index layer 1, for example. The adhesive layer 6 is arrange|positioned between the base material 5 and the polarizing film 20, and is in contact with each of the base material 5 and the polarizing film 20, for example.

The base material 5 contains a resin film which has transparency, for example. As a material for such a resin film, for example, a cellulose resin (triacetyl cellulose, diacetyl cellulose, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose, nitrocellulose, etc.), polyamide resin (nylon-6, Nylon-66, etc.), polyimide resin, polycarbonate resin, polyester resin (polyethylene terephthalate, polyethylene naphthalate, poly-1,4-cyclohexanedimethylene terephthalate, polyethylene-1,2- Diphenoxyethane-4,4'-dicarboxylate, polybutylene terephthalate, etc.), polyolefin-based resins (polyethylene, polypropylene, polymethylpentene, etc.), polysulfone-based resins, polyethersulfone-based resins, polya Relative resin, polyetherimide resin, polymethyl methacrylate resin, polyether ketone resin, polystyrene resin, polyvinyl chloride resin, polyvinyl alcohol resin, ethylene vinyl alcohol resin, (meth)acrylic resin, (meth) ) and acrylonitrile resins. A layer of a single resin film may be sufficient as the base material 5, the laminated body of several resin films may be sufficient, and the laminated body of a resin film and the hard-coat layer mentioned later may be sufficient as it. The base material 5 may contain the additive. As a specific example of an additive, an antistatic agent, a ultraviolet absorber, a plasticizer, a lubricant, a coloring agent, antioxidant, a flame retardant, etc. are mentioned.

In one preferred embodiment of the present invention, the substrate 5 is a triacetyl cellulose (TAC) film. A triacetyl cellulose film can also function as a protective film of a polarizer. Therefore, by using the antireflection film 11 which has the base material 5 which consists of a triacetyl cellulose film, the transparent protective film which the polarizing film 20 has on the visual recognition side may be abbreviate|omitted.

In another preferable aspect of this invention, the base material 5 contains a hard-coat layer. The base material 5 may be comprised by the hard-coat layer, and the laminated body of a resin film and a hard-coat layer may be sufficient as it. A hard-coat layer is a hardened layer of ionizing-ray-curable resin, for example. As an ionizing beam, an ultraviolet-ray, visible light, infrared rays, and an electron beam are mentioned, for example, Preferably it is an ultraviolet-ray. That is, the ionizing ray-curable resin is preferably an ultraviolet-curable resin. Examples of the ultraviolet curable resin include (meth)acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, and epoxy resins. As (meth)acrylic-type resin, the hardened|cured material (polymer) in which the polyfunctional monomer containing a (meth)acryloyloxy group was hardened|cured by ultraviolet-ray is mentioned, for example. A polyfunctional monomer is used 1 type or in combination of 2 or more type, for example. The polyfunctional monomer is used, for example, in combination with a photopolymerization initiator.

In the hard coat layer, inorganic fine particles or organic fine particles may be dispersed. The average particle diameter (d50) of the microparticles|fine-particles is 0.01 micrometer - 3 micrometers, for example. As microparticles|fine-particles disperse|distributed in the hard-coat layer, a viewpoint of _a refractive index, stability, heat resistance, etc. to silicon oxide (SiO2) is preferable. The hard-coat layer may contain the additive. As a specific example of an additive, a leveling agent, a filler, a dispersing agent, a plasticizer, a ultraviolet absorber, surfactant, antioxidant, and a thixotropy agent are mentioned. Moreover, the uneven|corrugated shape may be formed in the surface of a hard-coat layer. The hard-coat layer which has an uneven|corrugated shape on the surface has a light-diffusion function (anti-glare).

The physical film thickness of the base material 5 is not particularly limited. When the substrate 5 is a layer of a single resin film or a laminate of a plurality of resin films, the physical film thickness of the substrate 5 is, for example, in the range of 10 µm to 200 µm. When the base material 5 includes a hard coat layer, the physical film thickness of the hard coat layer is, for example, in the range of 1 µm to 50 µm.

The refractive index of the base material 5 (the refractive index of the layer on the first high refractive index layer 1 side when the base material 5 has a laminated structure) is, for example, 1.3 to 1.8, preferably 1.4 to 1.7 to be.

The adhesive layer 6 is a layer containing an adhesive. As an adhesive contained in the adhesive layer 6, resin which has adhesiveness is mentioned, for example. As such resin, an acrylic resin, an acrylic urethane resin, a urethane resin, silicone resin, etc. are mentioned. It is preferable that the adhesive layer 6 contains the acrylic adhesive comprised from an acrylic resin.

The adhesive layer 6 may further contain an additive as needed. Examples of additives include crosslinking agents, tackifiers, plasticizers, pigments, dyes, fillers, antioxidants, conductive materials, ultraviolet absorbers, light stabilizers, peeling modifiers, softeners, surfactants, flame retardants, antioxidants, and the like. Examples of the crosslinking agent include an isocyanate crosslinking agent, an epoxy crosslinking agent, a peroxide crosslinking agent, a melamine crosslinking agent, a urea crosslinking agent, a metal alkoxide crosslinking agent, a metal chelate crosslinking agent, a metal salt crosslinking agent, a carbodiimide crosslinking agent, an oxazoline crosslinking agent, an aziridine crosslinking agent. A crosslinking agent, an amine type crosslinking agent, etc. are mentioned.

The physical film thickness of the pressure-sensitive adhesive layer 6 is, for example, 5 µm to 100 µm, preferably 10 µm to 50 µm.

The antireflection film 11 may further have other members other than the base material 5 and the adhesive layer 6 . The antireflection film 11 may further have an antiglare layer disposed between the base material 5 and the first high refractive index layer 1 , for example. The anti-reflection film 11 is disposed between specific members (eg, between the substrate 5 and the first high refractive index layer 1 , or between the antiglare layer and the first high refractive index layer 1 ). You may have more layers. An adhesion layer is a layer which improves the adhesiveness of members, and contains silicon|silicone and SiOx ( _x <2), for example. The physical film thickness of the adhesion layer is, for example, 1 nm to 10 nm, preferably 2 nm to 5 nm. The refractive index of the adhesive layer is, for example, 1 to 2.5.

The antireflection films 10 and 11 are disposed on the viewing side rather than the second low-refractive-index layer 4 , and may further have an antifouling layer in contact with the second low-refractive-index layer 4 . The antifouling layer is a layer having an antifouling effect, and includes, for example, at least one selected from a fluorine-based resin and a silicone-based resin. The physical film thickness of the antifouling layer is, for example, 5 nm to 13 nm, preferably 5 nm to 10 nm. The refractive index of the antifouling layer is, for example, 1-2.

It is preferable that the absolute values of the a ₁ ^* value and the b ₁ ^* value in the L ^* a ^* b ^* color space are small for the reflected light generated when light is incident on the anti-reflection films 10 and 11 from the CIE standard light source D65. . a ₁ ^* value is, for example, -6 or more and 6 or less, More preferably, it is -3 or more and 3 or less. The b ₁ ^* value is, for example, -15 or more and 3 or less, preferably -10 or more and 2 or less, and more preferably -5 or more and 2 or less. The a ₁ ^* value and the b ₁ ^* value can be specified by the following method. First, the first high refractive index layer (1), the first low refractive index layer (2), the second high refractive index layer (3), and the second low refractive index layer (4) of the antireflection film (10) in this order on the black film The antireflection film 11 is affixed to the black film by lamination or by the adhesive layer 6 of the antireflection film 11 . Next, light from the CIE standard light source D65 is made incident on the surface of the antireflection film 10 or 11 on the second low-refractive-index layer side at an incident angle of 5°. With respect to the spectral reflected light generated at this time, the spectral reflectance in the wavelength range of 360 nm to 740 nm is specified, and the tristimulus value in the XYZ color space is specified from the spectral reflectance. Using the obtained tristimulus values, a ₁ ^* value and b ₁ ^* value are specified by the above formulas (i) and (ii).

The luminous reflectance Y ₁ of the reflected light is, for example, 0.3% or less, and preferably 0.2% or less.

[Polarizing film]

The polarizing film 20 is a laminate including a polarizer and a transparent protective film. A transparent protective film is arrange|positioned, for example in contact with the main surface (surface which has the largest area) of a layered polarizer. A polarizer may be arrange|positioned between two transparent protective films. The polarizer is not particularly limited, and for example, to a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, an ethylene/vinyl acetate copolymer-based partially saponified film, iodine, a dichroic dye, etc. uniaxial stretching by adsorbing a dichroic material; Polyene-type oriented films, such as a dehydration-processed material of polyvinyl alcohol, and a dehydrochloric acid-treated product of polyvinyl chloride, etc. are mentioned. The polarizer is preferably made of a polyvinyl alcohol-based film and a dichroic substance such as iodine.

The thickness of a polarizer is not specifically limited, For example, it is 80 micrometers or less. The thickness of the polarizer may be 10 µm or less, preferably 1 to 7 µm. Such a thin polarizer has little thickness nonuniformity and is excellent in visibility. A dimensional change is suppressed and the thin polarizer is excellent in durability. According to the thin polarizer, the polarizing film 20 can be made thin.

As a material of a transparent protective film, the thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy, etc. is used, for example. Specific examples of such a thermoplastic resin include cellulose resins such as triacetyl cellulose, polyester resins, polyethersulfone resins, polysulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, and (meth)acrylic resins. Resin, cyclic polyolefin resin (norbornene resin), polyarylate resin, polystyrene resin, polyvinyl alcohol resin, and these mixtures are mentioned. The material of the transparent protective film may be a thermosetting resin or ultraviolet curable resin such as (meth)acrylic, urethane, acrylic urethane, epoxy, or silicone. When the polarizing film 20 has two transparent protective films, the material of two transparent protective films may mutually be same or different. For example, a transparent protective film made of a thermoplastic resin is bonded to one main surface of the polarizer via an adhesive, and a transparent protective film made of a thermosetting resin or an ultraviolet curable resin is bonded to the other main surface of the polarizer. it may be The transparent protective film may contain one or more types of arbitrary additives.

The transparent protective film may have optical characteristics, such as an anti-glare characteristic and an antireflection characteristic. The transparent protective film may be a film functioning as a retardation film. In this specification, the retardation film means a film|membrane which has birefringence in an in-plane direction or thickness direction. As a film which functions as a retardation film, the thing which stretched the polymer film, orientated and fixed the liquid crystal material, etc. are mentioned, for example.

The adhesive for bonding the polarizer and the transparent protective film is not particularly limited as long as it is optically transparent. For example, an adhesive such as a water-based, solvent-based, hot-melt-based, radical-curable, or cation-curable adhesive, preferably a water-based adhesive and A radical hardening-type adhesive agent is mentioned.

The thickness of the polarizing film 20 is 10 micrometers - 500 micrometers, for example. The total light transmittance of the polarizing film 20 is not specifically limited, For example, it is 30 % - 50 %. In this specification, "total light transmittance" means the transmittance|permeability of the light in the range of wavelength 380nm - 700nm. A total light transmittance can be measured based on the prescription|regulation of JISK7361-1:1997. For the measurement of the total light transmittance, a CIE standard light source D65 is used.

-6.0 to 0 are preferable, as for the a-value in Hunter Lab colorimetric system of transmitted light when light from CIE standard light source D65 is incident with respect to polarizing film 20, -3.0 to -0.5 are more preferable, - 1.8 to -1.2 are particularly preferred. 1.0-10 are preferable, as for the b-value in the Hunter Lab colorimetric system of the said transmitted light, 1.5-5.0 are more preferable, 2.2-4.0 are especially preferable. The a-value and the b-value in the Hunter Lab colorimetric system of transmitted light can be specified by the following method. First, the transmittance|permeability of the light from CIE standard light source D65 in the polarizing film 20 is measured using the integrating sphere of a spectrophotometer. With respect to the obtained transmittance, a value and b value in the Hunter Lab colorimetric system of transmitted light are specified by performing visibility correction (780 to 380 nm: every 5 nm) by the 2 degree field of view XYZ system prescribed in JIS Z8701:1999. can do.

[Electroconductive layer which polarizing film with antireflection film has]

The conductive layer 40 is a layer containing a conductive material. The conductive material may be a material other than ITO, and for example, a conductive polymer, a composite of a conductive polymer and a dopant, an ionic surfactant, conductive fine particles, an ionic compound, and the like. It is preferable that the conductive layer 40 contains a conductive polymer from a stability viewpoint of transparency, a total light transmittance, an external appearance, an antistatic effect, and the antistatic effect in a high-temperature or high-humidity environment. When the conductive layer 40 contains a conductive polymer as an electrically conductive material, compared with the case where it contains electrically conductive fine particles, even if it adjusts comparatively large thickness of the conductive layer 40, it is hard to generate|occur|produce a haze. Therefore, even when the conductive layer 40 is disposed between the liquid crystal cell 25 and the polarizer, the conductive layer 40 containing the conductive polymer hardly causes depolarization, and the image displayed by the liquid crystal display device It is difficult to lower the contrast of When the conductive layer 40 contains a conductive polymer as a conductive material, the refractive index of the conductive layer 40 tends to be low compared to the case where conductive fine particles are included. Therefore, the conductive layer 40 containing a conductive polymer is suitable for reducing the reflectance of the light of the liquid crystal panel 100 more.

Examples of the conductive polymer include polythiophene, polyaniline, polypyrrole, polyquinoxaline, polyacetylene, polyphenylenevinylene, polynaphthalene, and derivatives thereof. The electrically-conductive material may contain the 1 type(s) or 2 or more types of these conductive polymers. As the conductive polymer, polythiophene, polyaniline and derivatives thereof are preferable, and polythiophene derivatives are particularly preferable. Polythiophene, polyaniline, and derivatives thereof function, for example, as a conductive polymer having water solubility or water dispersibility. When the conductive polymer has water solubility or water dispersibility, the conductive layer 40 may be prepared using an aqueous solution or aqueous dispersion of the conductive polymer. In this case, since it is not necessary to use a non-aqueous organic solvent for preparation of the conductive layer 40, the quality change of the polarizing film 20 etc. by an organic solvent can be suppressed.

The conductive polymer may have a hydrophilic functional group. Examples of the hydrophilic functional group include a sulfone group, an amino group, an amide group, an imino group, a hydroxyl group, a mercapto group, a hydrazino group, a carboxyl group, a sulfate ester group, a phosphoric acid ester group, and salts thereof (eg, quaternary ammonium salts). group) can be mentioned. When the conductive polymer has a hydrophilic functional group, the conductive polymer tends to dissolve in water, or the conductive polymer in particulate form tends to be easily dispersed in water.

From the viewpoint of conductivity and chemical stability, the conductive polymer is preferably poly(3,4-2-substituted thiophene). As poly(3,4-2 substituted thiophene), poly(3,4-alkylenedioxythiophene) and poly(3,4- dialkoxythiophene) are mentioned, for example, Preferably poly( 3,4-alkylenedioxythiophene). Poly(3,4-alkylenedioxythiophene) has a structural unit represented by the following formula (I), for example.

In formula (I), R< ¹ > is a C1-C4 alkylene group, for example. The alkylene group may be linear or branched. Examples of the alkylene group include a methylene group, 1,2-ethylene group, 1,3-propylene group, 1,4-butylene group, 1-methyl-1,2-ethylene group, 1-ethyl-1,2- ethylene group, 1-methyl-1,3-propylene group, and 2-methyl-1,3-propylene group are exemplified, preferably methylene group, 1,2-ethylene group, 1,3-propylene group, more Preferably, it is a 1,2-ethylene group. The conductive polymer is preferably poly(3,4-ethylenedioxythiophene) (PEDOT).

As a dopant, a polyvalent anion is mentioned, for example. When the conductive polymer is polythiophene (or a derivative thereof), the polyvalent anion forms an ion pair with polythiophene (or a derivative thereof), and polythiophene (or a derivative thereof) can be stably dispersed in water. . It does not specifically limit as a polyhydric anion, For example, Carboxylic acid polymers, such as polyacrylic acid, polymaleic acid, and polymethacrylic acid; Sulfonic acid polymers, such as polystyrene sulfonic acid, polyvinyl sulfonic acid, and polyisoprene sulfonic acid, etc. are mentioned. The polyvalent anion may be a copolymer of vinyl carboxylic acids or vinyl sulfonic acids and other monomers. As other monomers, For example, (meth)acrylate compound; and aromatic vinyl compounds such as styrene and vinylnaphthalene. The polyvalent anion is particularly preferably polystyrene sulfonic acid (PSS). Examples of the composite of the conductive polymer and the dopant include a composite of poly(3,4-ethylenedioxythiophene) and polystyrenesulfonic acid (PEDOT/PSS).

As an ionic surfactant, For example, Cationic surfactant, such as a quaternary ammonium salt type, a phosphonium salt type, and a sulfonium salt type; anionic surfactants such as carboxylic acid type, sulfonate type, sulfate type, phosphate type and phosphite type; amphoteric surfactants such as sulfobetaine type, alkylbetaine type, and alkylimidazolium betaine type; and nonionic surfactants such as polyhydric alcohol derivatives, β-cyclodextrin inclusion compounds, sorbitan fatty acid monoesters, sorbitan fatty acid diesters, polyalkylene oxide derivatives, and amine oxides.

Examples of the conductive fine particles include fine metal oxide fine particles such as a tin oxide type, an antimony oxide type, an indium oxide type, and a zinc oxide type, and a tin oxide type fine particle is preferable. Examples of the material of the tin oxide-based fine particles include tin oxide, antimony-doped tin oxide, indium-doped tin oxide, aluminum-doped tin oxide, tungsten-doped tin oxide, titanium oxide-cerium oxide-tin oxide composite, titanium oxide-tin oxide. and complexes of The average particle diameter of electroconductive fine particles is 1-100 nm, for example, Preferably it is 2-50 nm. The average particle diameter of electroconductive fine particles means the particle diameter (d50) corresponding to 50% of volume accumulation in the particle size distribution measured by the laser diffraction type particle size meter etc., for example.

Examples of the ionic compound include alkali metal salts and/or organic cation-anion salts. As an alkali metal salt, the organic salt and inorganic salt of an alkali metal are mentioned, for example. In the present specification, the organic cation-anion salt means an organic salt containing an organic cation. An organic anion may be sufficient as the anion contained in organic cation-anion salt, and an inorganic anion may be sufficient as it. The organic cation-anion salt is sometimes called an ionic liquid or an ionic solid.

As an alkali metal ion contained in an alkali metal salt, a lithium ion, a sodium ion, and a potassium ion are mentioned, for example, A lithium ion is preferable.

As an anion contained in the organic salt of an alkali metal, For example, CH ₃ COO ⁻ , CF ₃ COO ⁻ , CH ₃ SO ₃ ⁻ , CF ₃ SO ₃ ⁻ , (CF ₃ SO ₂ ) ₃ C ⁻ , C ₄ F ₉ SO ₃ ^- , C ₃ F ₇ COO ^- , (CF ₃ SO ₂ )(CF ₃ CO)N ^- , ^- O ₃ S(CF ₂ ) ₃ SO ₃ ^- , (CN) ₂ N ^- and the following general formula (a ) to the anions represented by (d) are mentioned.

(a) (C _n F _{2n + 1} SO ₂ ) ₂ N ^- (provided that n is an integer of 1 to 10)

(b) CF ₂ (C _m F _2m SO ₂ ) ₂ N ^- (provided that m is an integer of 1 to 10)

(c) ^-O ₃ S(CF ₂ ) _l SO ₃ ^- (provided that l is an integer of 1 to 10)

(d) (C _p F _{2p + 1} SO ₂ )N ^- (C _q F _{2q + 1} SO ₂ ) (provided that p and q are each independently an integer of 1 to 10)

It is preferable that the anion contained in the organic salt of an alkali metal contains a fluorine atom. According to the anion containing a fluorine atom, the organic salt of an alkali metal functions as an ionic compound excellent in ionic dissociation.

Examples of the anion contained in the inorganic salt of alkali metal include Cl ^- , Br ^- , I ^- , AlCl ₄ ^- , Al ₂ Cl ₇ ^- , BF ₄ ^- , PF ₆ ^- , ClO ₄ ^- , NO ₃ ^- , AsF ₆ ^- , SbF ₆ ^- , NbF ₆ ^- , TaF ₆ ^- , (FSO ₂ ) ₂ N ^- , CO ₃ ^2- , and the like.

Examples of the anion contained in the alkali metal salt include (perfluoroalkylsulfonyl)imides represented by the general formula (a), such as (CF ₃ SO ₂ ) ₂ N ^- and (C ₂ F ₅ SO ₂ ) ₂ N ^- preferred, and particularly preferred is (trifluoromethanesulfonyl)imide represented by (CF ₃ SO ₂ ) ₂ N ⁻ .

As an organic salt of an alkali metal, For example, sodium acetate, sodium alginate, sodium ligninsulfonate, sodium toluenesulfonate, LiCF3SO3 _, Li _{( CF3SO2} ) _{2N , Li ( C2F5SO2} ) _2N , Li(C ₄ F ₉ SO ₂ ) ₂ N, Li(CF ₃ SO ₂ ) ₃ C, KO ₃ S(CF ₂ ) ₃ SO ₃ K, LiO ₃ S(CF ₂ ) ₃ SO ₃ K, etc. and preferably LiCF ₃ SO ₃ , Li(CF ₃ SO ₂ ) ₂ N, Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C ₄ F ₉ SO ₂ ) ₂ N, Li(CF ₃ SO ₂ ) ) ₃ C, and more preferably Li(CF ₃ SO ₂ ) ₂ N, Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C ₄ F ₉ SO ₂ ) ₂ N. It is preferable that it is a fluorine-containing lithium imide salt, and, as for the organic salt of an alkali metal, it is especially preferable that it is a (perfluoroalkyl sulfonyl) imi lithium salt.

As an inorganic salt of an alkali metal, lithium perchlorate and lithium iodide are mentioned, for example.

Examples of the organic cation contained in the organic cation-anion salt include a pyridinium cation, a piperidinium cation, a pyrrolidinium cation, a cation having a pyrroline skeleton, a cation having a pyrrole skeleton, an imidazolium cation, tetrahydropyri and a midinium cation, a dihydropyrimidinium cation, a pyrazolium cation, a pyrazolinium cation, a tetraalkylammonium cation, a trialkylsulfonium cation, and a tetraalkylphosphonium cation.

Examples of the anion contained in the organic cation-anion salt include Cl ^- , Br ^- , I ^- , AlCl ₄ ^- , Al ₂ Cl ₇ ^- , BF ₄ ^- , PF ₆ ^- , ClO ₄ ^- , NO ₃ ^- , CH ₃ COO ^- , CF ₃ COO ^- , CH ₃ SO ₃ ^- , CF ₃ SO ₃ ^- , (CF ₃ SO ₂ ) ₃ C ^- , AsF ₆ ^- , SbF ₆ ^- , NbF ₆ ^- , TaF ₆ ^- , (CN) ₂ N ^- , C ₄ F ₉ SO ₃ ^- , C ₃ F ₇ COO ^- , (CF ₃ SO ₂ )(CF ₃ CO)N ^- , (FSO ₂ ) ₂ N ^- , ^- O ₃ S(CF ₂ ) ₃ SO ₃ ⁻ and anions represented by the general formulas (a) to (d) described above. It is preferable that the anion contained in organic cation-anion salt contains a fluorine atom. According to the anion containing a fluorine atom, an organic cation-anion salt functions as an ionic compound excellent in ionic dissociation.

The ionic compound is not limited to the alkali metal salts and organic cation-anion salts described above, and examples thereof include inorganic salts such as ammonium chloride, aluminum chloride, copper chloride, ferrous chloride, ferric chloride and ammonium sulfate. have. The electrically-conductive material may contain the above-mentioned ionic compound 1 type(s) or 2 or more types.

As an electrically-conductive material, It is not limited to the material mentioned above, For example, Carbon materials, such as acetylene black, Ketjen black, natural graphite, and artificial graphite; titanium black; A homopolymer of a monomer having a cationic conductive group such as a quaternary ammonium salt, an amphoteric conductive group such as a betaine compound, an anionic conductive group such as a sulfonate, or a nonionic conductive group such as glycerin, or the monomer and copolymers of other monomers (for example, polymers having ion conductivity, such as polymers having structural units derived from acrylates or methacrylates having a quaternary ammonium base); Also mentioned are those obtained by alloying a hydrophilic polymer such as a copolymer of ethylene and methacrylate with an acrylic resin or the like (permanent antistatic agent).

The conductive layer 40 may further contain other materials, such as a binder, other than an electrically-conductive material. A binder tends to improve the adhesiveness of the conductive layer 40 with respect to the polarizing film 20, and adhesiveness (an anchoring force), while improving the film-forming property of an electrically-conductive material, for example. As the binder, for example, an oxazoline group-containing polymer, polyurethane-based resin, polyester-based resin, acrylic resin, polyether-based resin, cellulose-based resin, polyvinyl alcohol-based resin, epoxy resin, polyvinylpyrrolidone, polystyrene-based resin Resin, polyethylene glycol, pentaerythritol, etc. are mentioned, Preferably they are an oxazoline group containing polymer, a polyurethane resin, a polyester resin, and an acrylic resin, Especially preferably, it is a polyurethane resin. The conductive layer 40 may contain 1 type, or 2 or more types of these binders. The content of the binder in the conductive layer 40 is, for example, 1 wt% to 90 wt%, preferably 10 wt% to 80 wt%.

The thickness of the conductive layer 40 is, for example, 5 nm to 180 nm, preferably 150 nm, more preferably 120 nm or less, still more preferably 100 nm or less, particularly preferably 80 nm. or less, and particularly preferably 50 nm or less. 10 nm or more may be sufficient as the thickness of the conductive layer 40, and 20 nm or more may be sufficient as it.

In the polarizing film 15 with an antireflection film, the loss A of the total light transmittance by the conductive layer 40 is, for example, 0.9% or less, Preferably it is 0.8% or less, More preferably, it is 0.6% or less, More preferably, it is 0.5 % or less, Especially preferably, it is 0.4 % or less, Especially preferably, it is less than 0.2 % of them. The lower limit of the loss A is not particularly limited, and is, for example, 0.01%. The loss A can be specified by the following method. First, the total light transmittance T1 of the polarizing film 20 and the total light transmittance T2 of the laminated body L which consists of the polarizing film 20 and the conductive layer 40 are measured. The total light transmittance T2 of the laminate L is a value when light is made to enter from the polarizing film 20 side. The difference (T1-T2) between the total light transmittance T1 and the total light transmittance T2 can be specified as the loss A.

In the polarizing film 15 with an antireflection film, when the said loss A is larger than 0.5 %, the value especially low in surface resistivity of the conductive layer 40 may be sufficient. As an example, in the polarizing film 15 with an antireflection film, (i) the loss A is 0.5% or less, and the surface resistivity of the conductive layer 40 is 1.0×10 ⁶ Ω/□ or less, and (ii) At least one of the loss A of 0.9% or less and the surface resistivity of the conductive layer 40 being 1.0×10 ⁴ Ω/square or less may be established.

The anchoring force of the conductive layer 40 and the polarizing film 20 is, for example, 10.0 N/25 mm or more, preferably 12.0 N/25 mm or more, more preferably 14.0 N/25 mm or more, More preferably, it is 18.0 N/25 mm or more. The anchoring force can be measured by the following method. First, the polarizing film 15 with an antireflection film which is an evaluation object is cut out in width 25mm x length 150mm, and it is set as a test piece. Next, through a double-sided tape, the entire surface of the antireflection film 10 included in the test piece is overlaid on a stainless steel test plate, and a 2 kg roller is made one reciprocating motion, and these are crimped. Next, the pressure-sensitive adhesive layer 30 included in the test piece is overlaid on the evaluation sheet, and a 2 kg roller is made one reciprocating motion, and these are crimped. The sheet for evaluation has a size of 30 mm in width x 150 mm in length, and is not particularly limited as long as it does not peel from the pressure-sensitive adhesive layer 30 during the test. As the sheet for evaluation, for example, an ITO film (125 Tetraite OES (manufactured by Oike Kogyo Co., Ltd.) or the like) can be used. Next, the pressure-sensitive adhesive layer 30 and the conductive layer 40 were separated from the polarizing film 20 at a peeling angle of 180° and a tensile rate of 300 mm/min in a state in which the sheet for evaluation was gripped using a commercially available tensile tester. The average value of the peeling force at the time of peeling is specified as anchoring force of the conductive layer 40 and the polarizing film 20. In addition, the said test is performed in 23 degreeC atmosphere.

[Adhesive layer]

The adhesive layer 30 is a layer containing an adhesive. As the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 30, for example, a rubber-based pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a vinyl alkyl ether-based pressure-sensitive adhesive, a polyvinylpyrrolidone-based pressure-sensitive adhesive, a polyacrylamide-based pressure-sensitive adhesive, a cellulose-based pressure-sensitive adhesive, etc. can be heard As an adhesive contained in the adhesive layer 30, it is excellent in optical transparency, has adhesive characteristics, such as appropriate wettability, cohesiveness, adhesiveness, and is excellent in weather resistance, heat resistance, etc., an acrylic adhesive is preferable.

An acrylic adhesive contains a (meth)acrylic-type polymer as a base polymer. The (meth)acrylic polymer contains, for example, a structural unit derived from (meth)acrylic acid ester as a main component. In this specification, "(meth)acrylic acid" means acrylic acid and/or methacrylic acid. "Main component" means a structural unit that is included in the polymer the most on a weight basis.

The number of carbon atoms of the ester moiety (parts other than the (meth)acrylic acid group) contained in the (meth)acrylic acid ester for forming the main skeleton of the (meth)acrylic polymer is not particularly limited, and is, for example, 1 to 18. The ester part of (meth)acrylic acid ester may contain aromatic rings, such as a phenyl group and a phenoxy group, and may contain the alkyl group. Linear may be sufficient as this alkyl group, and branched form may be sufficient as it. The (meth)acrylic polymer may contain 1 type(s) or 2 or more types of structural units derived from (meth)acrylic acid ester. (meth)acrylic polymer WHEREIN: It is preferable that the average value of carbon number of the ester part contained in the structural unit derived from (meth)acrylic acid ester is 3-9. It is preferable that the (meth)acrylic-type polymer has a structural unit derived from the (meth)acrylic acid ester containing an aromatic ring from viewpoints of adhesive characteristics, durability, adjustment of retardation, adjustment of refractive index, etc. By adjusting the retardation of the pressure-sensitive adhesive layer 30 with (meth)acrylic acid ester containing an aromatic ring, the polarizing film 20 heat-shrinks and the pressure-sensitive adhesive layer 30 is stretched to reduce light leakage of the liquid crystal display device. can be suppressed Moreover, this (meth)acrylic acid ester adjusts the refractive index of the adhesive layer 30, and is suitable for reducing the difference of the refractive index of the adhesive layer 30 and to-be-adhered body (liquid crystal cell). When the difference in refractive index is reduced, reflection of light at the interface between the pressure-sensitive adhesive layer 30 and the adherend is suppressed, and the visibility of the display can be improved.

As (meth)acrylic acid ester containing an aromatic ring, For example, benzyl (meth)acrylate, phenyl (meth)acrylate, o-phenylphenol (meth)acrylate, phenoxy (meth)acrylate, phenoxyethyl (meth)acrylate, phenoxypropyl (meth)acrylate, phenoxydiethylene glycol (meth)acrylate, ethylene oxide-modified nonylphenol (meth)acrylate, ethylene oxide-modified cresol (meth)acrylate, phenol ethylene Oxide-modified (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, methoxybenzyl (meth)acrylate, chlorobenzyl (meth)acrylate, cresyl (meth)acrylate, (meth)acrylic acid ester containing benzene rings, such as styryl (meth)acrylate; Hydroxyethylated β-naphthol acrylate, 2-naphthoethyl (meth) acrylate, 2-naphthoxyethyl acrylate, 2-(4-methoxy-1-naphthoxy) ethyl (meth) acrylate, etc. (meth)acrylic acid ester containing a naphthalene ring; (meth)acrylic acid ester containing biphenyl rings, such as biphenyl (meth)acrylate, etc. are mentioned. Among these, from a viewpoint of improving the adhesive characteristic and durability of the adhesive layer 30, benzyl (meth)acrylate and phenoxyethyl (meth)acrylate are preferable.

When the refractive index of the pressure-sensitive adhesive layer 30 is adjusted by the (meth)acrylic acid ester containing an aromatic ring, the structure derived from the (meth)acrylic acid ester containing the aromatic ring in all structural units of the (meth)acrylic polymer It is preferable that the content rate of a unit is 3 weight% - 25 weight%. 22 weight% or less is more preferable, and, as for this content rate, 20 weight% or less is still more preferable. 8 weight% or more is more preferable, and, as for this content rate, 12 weight% or more is still more preferable. When the content rate of the structural unit derived from (meth)acrylic acid ester containing an aromatic ring is 25 weight% or less, while being able to suppress the light leakage of the liquid crystal display device by shrinkage|contraction of the polarizing film 20, an adhesive layer ( 30) tends to improve the reworkability. There exists a tendency which can fully suppress the light leakage of a liquid crystal display device as this content rate is 3 weight% or more.

The (meth)acrylic polymer, in addition to the structural unit derived from the (meth)acrylic acid ester containing the aromatic ring described above, from the viewpoint of improving adhesiveness and heat resistance, (meth)acryloyl group, unsaturated double bonds such as vinyl group You may have one or more types of structural units derived from the copolymerization monomer which has a polymerizable functional group containing. As this copolymerization monomer, for example, (meth)acrylic acid 2-hydroxyethyl, (meth)acrylic acid 3-hydroxypropyl, (meth)acrylic acid 4-hydroxybutyl, (meth)acrylic acid 6-hydroxyhexyl, (meth)acrylic acid ) hydroxyl group-containing monomers such as 8-hydroxyoctyl acrylic acid, 10-hydroxydecyl (meth)acrylic acid, 12-hydroxylauryl (meth)acrylic acid, and (4-hydroxymethylcyclohexyl)methyl acrylate; carboxyl group-containing monomers such as (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itaconic acid, maleic acid, fumaric acid, and crotonic acid; acid anhydride group-containing monomers such as maleic anhydride and itaconic anhydride; caprolactone adduct of acrylic acid; Sulfonic acid groups such as styrenesulfonic acid, allylsulfonic acid, 2-(meth)acrylamide-2-methylpropanesulfonic acid, (meth)acrylamidopropanesulfonic acid, sulfopropyl (meth)acrylate, and (meth)acryloyloxynaphthalenesulfonic acid containing monomers; Phosphoric acid group containing monomers, such as 2-hydroxyethyl acryloyl phosphate, etc. are mentioned.

As said copolymerization monomer, For example, (meth)acrylamide, N,N- dimethyl (meth)acrylamide, N-butyl (meth)acrylamide, N-methylol (meth)acrylamide, N-methylolpropane ( (N-substituted) amide-based monomers such as meth)acrylamide; (meth)acrylic acid alkylaminoalkyl ester monomers such as (meth)acrylic acid aminoethyl, (meth)acrylic acid N,N-dimethylaminoethyl, and (meth)acrylic acid t-butylaminoethyl; (meth)acrylic acid alkoxyalkyl monomers such as methoxyethyl (meth)acrylate and ethoxyethyl (meth)acrylate; N-(meth)acryloyloxymethylenesuccinimide, N-(meth)acryloyl-6-oxyhexamethylenesuccinimide, N-(meth)acryloyl-8-oxyoctamethylenesuccinimide, etc. of succinimide-based monomers; morpholine-based monomers such as N-acryloylmorpholine; maleimide-based monomers such as N-cyclohexyl maleimide, N-isopropyl maleimide, N-lauryl maleimide, and N-phenyl maleimide; N-methylitaconimide, N-ethyl itaconimide, N-butyl itaconimide, N-octyl itaconimide, N-2-ethylhexyl itaconimide, N-cyclohexyl itaconimide Itaconimide-type monomers, such as mide|mid and N- lauryl itaconimide, etc. are mentioned.

Examples of the copolymer monomer include vinyl acetate, vinyl propionate, N-vinylpyrrolidone, methylvinylpyrrolidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperazine, vinylpyrazine, vinylpyrrole, and vinyl. vinyl-based monomers such as midazole, vinyloxazole, vinylmorpholine, N-vinylcarboxylic acid amides, styrene, α-methylstyrene, and N-vinylcaprolactam; cyanoacrylate-based monomers such as acrylonitrile and methacrylonitrile; Epoxy group-containing acrylic monomers, such as (meth)acrylic-acid glycidyl; glycol-based acrylic ester monomers such as (meth)acrylic acid polyethylene glycol, (meth)acrylic acid polypropylene glycol, (meth)acrylic acid methoxyethylene glycol, and (meth)acrylic acid methoxypolypropylene glycol; Acrylic acid ester-type monomers, such as (meth)acrylic-acid tetrahydrofurfuryl, fluorine (meth)acrylate, silicone (meth)acrylate, 2-methoxyethyl acrylate, etc. are mentioned. Moreover, as a copolymerization monomer, For example, Olefin monomers, such as isoprene, a butadiene, and isobutylene; Ether group-containing vinyl monomers, such as vinyl ether, are also mentioned.

Examples of the copolymer monomer include 3-acryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-vinylbutyltriethoxysilane, and 8- Vinyloctyltrimethoxysilane, 8-vinyloctyltriethoxysilane, 10-methacryloyloxydecyltrimethoxysilane, 10-acryloyloxydecyltrimethoxysilane, 10-methacryloyloxydecyltri Silane-type monomers, such as ethoxysilane and 10-acryloyloxydecyl triethoxysilane, are also mentioned.

As said copolymerization monomer, for example, tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, bisphenol A diglycidyl ether di( Meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate, such as (meth) acrylic acid and an ester of a polyhydric alcohol ((meth) acryloyl group, polyfunctional monomers having two or more unsaturated double bonds such as vinyl groups); A compound in which two or more compounds having an unsaturated double bond such as a (meth)acryloyl group or a vinyl group are added to a skeleton of polyester, epoxy, or urethane (for example, polyester (meth)acrylate, epoxy (meth) ) acrylate and urethane (meth)acrylate) may be used.

The content rate of the structural unit derived from the above-mentioned copolymerization monomer in the (meth)acrylic polymer is not particularly limited, and is, for example, 0 wt% to 20 wt%, preferably 0.1 wt% to 15 wt%, more preferably It is preferably 0.1 wt% to 10 wt%.

As a copolymerization monomer, a hydroxyl-group containing monomer and a carboxyl group containing monomer are preferable from a viewpoint of adhesiveness and durability. As a copolymerization monomer, you may use together a hydroxyl-group containing monomer and a carboxyl group containing monomer. A copolymerization monomer functions as a reaction point with a crosslinking agent, when the adhesive composition for forming the adhesive layer 30 contains a crosslinking agent, for example. Since a hydroxyl group-containing monomer, a carboxyl group-containing monomer, etc. are excellent in reactivity with an intermolecular crosslinking agent, it is suitable for improving the cohesiveness and heat resistance of the adhesive layer 30 obtained. In particular, the hydroxyl group-containing monomer is suitable for improving the reworkability of the pressure-sensitive adhesive layer 30 . A carboxyl group-containing monomer is suitable for making the durability of the adhesive layer 30 and rework property compatible.

When a hydroxyl group-containing monomer is used as the copolymerization monomer, the content rate of the structural unit derived from the hydroxyl group-containing monomer in the (meth)acrylic polymer is preferably 0.01 wt% to 15 wt%, and 0.03 wt% to 0.03 wt% It is more preferable that it is 10 wt%, and it is still more preferable that it is 0.05 wt% - 7 wt%. When a carboxyl group-containing monomer is used as the copolymerization monomer, the content rate of the structural unit derived from the carboxyl group-containing monomer in the (meth)acrylic polymer is preferably 0.05 wt% to 10 wt%, and 0.1 wt% to 8 wt% It is more preferable, and it is still more preferable that it is 0.2 wt% - 6 wt%.

The weight average molecular weight of the (meth)acrylic polymer is, for example, 500,000 to 3 million, preferably 700,000 to 2.7 million, more preferably 800,000 to 2.5 million from the viewpoint of durability and particularly heat resistance. When the weight average molecular weight of the (meth)acrylic polymer is 500,000 or more, the pressure-sensitive adhesive layer 30 tends to have practically sufficient heat resistance. When the weight average molecular weight of the (meth)acrylic polymer is 3 million or less, there exists a tendency that the viscosity of the coating liquid for producing the adhesive layer 30 can be adjusted easily. Since it is not necessary to add a large amount of diluent solvent to a coating liquid if the viscosity of a coating liquid can be adjusted easily, the manufacturing cost of the adhesive layer 30 can be suppressed. In this specification, a weight average molecular weight means the value which carried out polystyrene conversion of the measurement result by GPC (gel permeation chromatography).

A (meth)acrylic polymer can be produced by well-known polymerization reactions, such as solution polymerization, block polymerization, emulsion polymerization, and various radical polymerization. The (meth)acrylic polymer may be a random copolymer, a block copolymer, or a graft copolymer.

The pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 30 may have a structure in which a base polymer is crosslinked with a crosslinking agent. For example, when a (meth)acrylic polymer is used as the base polymer, an organic crosslinking agent or a polyfunctional metal chelate may be used as the crosslinking agent. As an organic type crosslinking agent, an isocyanate type crosslinking agent, a peroxide type crosslinking agent, an epoxy type crosslinking agent, an imine type crosslinking agent, etc. are mentioned, for example. The polyfunctional metal chelate means that a polyvalent metal is covalently bonded or coordinated with an organic compound. Examples of the atoms constituting the polyvalent metal include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn , Ti, and the like. The organic compound contained in the polyfunctional metal chelate contains, for example, an oxygen atom and the like. Examples of the organic compound include an alkyl ester, an alcohol compound, a carboxylic acid compound, an ether compound, and a ketone compound.

In the pressure-sensitive adhesive, the amount of the crosslinking agent used is preferably 3 parts by weight or less, more preferably 0.01 to 3 parts by weight, still more preferably 0.02 to 2 parts by weight, and 0.03 to 1 parts by weight with respect to 100 parts by weight of the (meth)acrylic polymer. Particular preference is given to

The adhesive layer 30 may further contain other materials other than an adhesive. As another material, an electrically-conductive material, a silane coupling agent, and other additives are mentioned, for example. An electrically-conductive material reduces the surface resistivity of the adhesive layer 30, and is suitable for preventing the display defect by charging of a liquid crystal display device. Examples of the conductive material include those described above for the conductive layer 40 . It is preferable that the electrically-conductive material contained in the adhesive layer 30 is an ionic compound from a viewpoint of compatibility with a base polymer, and transparency of the adhesive layer 30. In particular, when the pressure-sensitive adhesive layer 30 includes an acrylic pressure-sensitive adhesive containing a (meth)acrylic polymer as a base polymer, it is preferable to use an ionic compound as the conductive material. It is preferable that an ionic compound is an ionic liquid from a viewpoint of antistatic performance.

It is preferable that the adhesive layer 30 contains 0.05 to 20 parts by weight of a conductive material (eg, an ionic compound) with respect to 100 parts by weight of the base polymer (eg, (meth)acrylic polymer) of the adhesive. . When the pressure-sensitive adhesive layer 30 contains 0.05 parts by weight or more of the conductive material, the surface resistivity of the pressure-sensitive adhesive layer 30 is sufficiently reduced, and the antistatic performance of the pressure-sensitive adhesive layer 30 tends to be sufficiently improved. It is preferable to contain 0.1 weight part or more of an electrically-conductive material with respect to 100 weight part of base polymers of an adhesive, and, as for the adhesive layer 30, it is more preferable to contain 0.5 weight part or more. From the viewpoint of imparting practically sufficient durability to the pressure-sensitive adhesive layer 30, the pressure-sensitive adhesive layer 30 preferably contains 20 parts by weight or less of a conductive material with respect to 100 parts by weight of the base polymer of the pressure-sensitive adhesive, and 10 parts by weight or less It is more preferable to include

Examples of other additives include polyether compounds such as polyalkylene glycol (eg, polypropylene glycol), colorants, pigments, dyes, surfactants, plasticizers, tackifiers, surface lubricants, leveling agents, softeners, It can be used suitably according to the use which uses antioxidant, antioxidant, a light stabilizer, a ultraviolet absorber, a polymerization inhibitor, an inorganic filler, an organic filler, metal powder, etc. The additive may be powder, particulate, or thin. As an additive, you may comprise a redox system by using a reducing agent within a controllable range. By adding a dye such as a colorant to the pressure-sensitive adhesive layer 30 , the color of the reflected light from the liquid crystal panel 100 can be adjusted in some cases. The pressure-sensitive adhesive layer 30 preferably contains 5 parts by weight or less of other additives with respect to 100 parts by weight of the base polymer (eg, (meth)acrylic polymer) of the pressure-sensitive adhesive, and more preferably contains 3 parts by weight or less. Preferably, it is more preferable to contain 1 part by weight or less.

The thickness of the adhesive layer 30 is not specifically limited, For example, it is 5-100 micrometers, Preferably it is 10-50 micrometers.

In the polarizing film 15 with an antireflection film, although the surface resistivity of the adhesive layer 30 is not specifically limited, It may be less than 1.0x10 ¹⁴ Ω/square, and it is preferable that it is 1.0x10 ¹² Ω/square or less. Although the lower limit of the surface resistivity of the adhesive layer 30 is not specifically limited, From a durable viewpoint, it is 1.0x10< ⁸ >(ohm)/square, for example. The surface resistivity of the pressure-sensitive adhesive layer 30 can be measured by the following method. First, a laminate in which the surface of the pressure-sensitive adhesive layer 30 is exposed to the outside is prepared. As such a laminated body, the laminated body by which the adhesive layer 30 was arrange|positioned on separator films, such as a polyethylene terephthalate film, is mentioned, for example. Next, with respect to the surface of the adhesive layer 30 in the prepared laminated body, the surface resistivity is measured. The measurement of surface resistivity can be measured based on the method prescribed|regulated to JISK6911:1995 using Hiresta-UP MCP-HT450 (made by Mitsubishi Chemical Analytech). The measured value obtained by this measurement can be regarded as the surface resistivity of the pressure-sensitive adhesive layer 30 .

[Other floor]

The polarizing film 15 with an antireflection film may further be equipped with layers other than the antireflection film 10, the polarizing film 20, the conductive layer 40, and the adhesive layer 30. The polarizing film 15 with an antireflection film may contain the other layer of 1 or 2 or more. The other layer is disposed, for example, on the viewing side rather than the antireflection film 10 and is in contact with the antireflection film 10 . As another layer, a surface protection film and retardation film are mentioned, for example.

A surface protection film has a support film and the adhesive layer arrange|positioned at the at least single side|surface of a support film, for example. The adhesive layer of a surface protection film may contain the light peeling agent, an electrically-conductive material, etc. When the pressure-sensitive adhesive layer of the surface protection film contains a conductive material, the surface protection film is bonded to the antireflection film 10, and then the surface protection film is peeled off to contain the conductive material in the antireflection film 10, A conductive function can be imparted to the surface. Examples of the conductive material include those described above for the conductive layer 40 . In order to provide an electrically conductive function to the surface of the antireflection film 10 by peeling of a surface protection film, it is preferable that the adhesive layer of a surface protection film contains an electrically-conductive material and a light release agent. As a light release agent, silicone resins, such as polyorganosiloxane, are mentioned, for example. The electrically conductive function provided to the surface of the antireflection film 10 can be suitably adjusted with the usage-amount of an electrically-conductive material and a light-release agent.

Another layer may contain the easily bonding layer for improving the adhesiveness between members. When another layer is an easily bonding layer, the said easily bonding layer may be arrange|positioned on the surface of the polarizing film 20. In addition, instead of the easily bonding layer, the surface of the polarizing film 20 may be subjected to a treatment for facilitating adhesion such as a corona treatment or a plasma treatment.

[Method for producing polarizing film with anti-reflection film]

The polarizing film 15 with an antireflection film which has the conductive layer 40 can be produced by the following method, for example. First, a solution or dispersion of an electrically-conductive material is prepared. The solvent of the solution or dispersion is, for example, water, and may further contain a water-soluble organic solvent. Examples of the water-soluble organic solvent include methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, n-amyl alcohol, isoamyl alcohol, sec-amyl alcohol, tert- and alcohols such as amyl alcohol, 1-ethyl-1-propanol, 2-methyl-1-butanol, n-hexanol and cyclohexanol.

Next, a solution or dispersion of a conductive material is applied to the surface of the polarizing film 20 . The conductive layer 40 is formed on the polarizing film 20 by drying the obtained coating film. Thereby, the laminated body L which consists of the polarizing film 20 and the conductive layer 40 is obtained.

Next, the antireflection film 10 (or 11) is arrange|positioned on the polarizing film 20 of the laminated body L, and the laminated body L1 is produced. Next, a solution containing an adhesive is prepared. A coating film is obtained by apply|coating this solution to the surface of a separator. A separator is not specifically limited, For example, the polyethylene terephthalate film processed with the silicone type release agent can be used. Next, the pressure-sensitive adhesive layer 30 is formed on the separator by drying the coating film. By transcribe|transferring the obtained adhesive layer 30 on the conductive layer 40 of laminated body L1, the polarizing film 15 with an antireflection film can be produced.

[Liquid Crystal Cell]

The liquid crystal cell 25 includes, for example, a liquid crystal layer 50 , a first transparent substrate 60 , and a second transparent substrate 70 . The liquid crystal layer 50 is, for example, disposed between the first transparent substrate 60 and the second transparent substrate 70 , and in contact with each of the first transparent substrate 60 and the second transparent substrate 70 , have. The adhesive layer 30 of the polarizing film 15 with an antireflection film is in contact with the 1st transparent substrate 60 of the liquid crystal cell 25, for example. The liquid crystal panel 100 does not have an ITO layer between the adhesive layer 30 and the 1st transparent substrate 60, for example.

The liquid crystal layer 50 includes, for example, liquid crystal molecules that are homogeneously aligned in the absence of an electric field. The liquid crystal layer 50 including such liquid crystal molecules is suitable for an In-Plane-Switching (IPS) method. However, the liquid crystal layer 50 may be used for a TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, π type, VA (Vertical Alignment) type, or the like. The thickness of the liquid crystal layer 50 is, for example, 1.5 µm to 4 µm.

As a material of the 1st transparent substrate 60 and the 2nd transparent substrate 70, glass and a polymer are mentioned, for example. In this specification, the transparent substrate comprised from a polymer may be called a polymer film. Examples of the polymer constituting the transparent substrate include polyethylene terephthalate, polycycloolefin, and polycarbonate. The thickness of the transparent substrate comprised from glass is 0.1 mm - 1 mm, for example. The thickness of the transparent substrate comprised of a polymer is 10 micrometers - 200 micrometers, for example.

The liquid crystal cell 25 may further include layers other than the liquid crystal layer 50 , the first transparent substrate 60 , and the second transparent substrate 70 . As another layer, a color filter, an easily bonding layer, and a hard-coat layer are mentioned, for example. The color filter is disposed, for example, on the viewing side rather than the liquid crystal layer 50 , and is preferably positioned between the first transparent substrate 60 and the pressure-sensitive adhesive layer 30 of the polarizing film 15 with an antireflection film. The easily bonding layer and the hard-coat layer are arrange|positioned on the surface of the 1st transparent substrate 60 or the 2nd transparent substrate 70, for example.

[Other Absence]

The liquid crystal panel 100 may further include other members other than the polarizing film 15 with an antireflection film and the liquid crystal cell 25 . For example, the liquid crystal panel 100 may further be equipped with the conduction|electrical_connection structure (not shown) electrically connected to the side surface of the polarizing film 15 with an antireflection film. When the conduction structure is connected to the ground, it is easy to suppress that the polarizing film 15 with an antireflection film is charged by static electricity. The conduction structure may cover the whole side surface of the polarizing film 15 with an antireflection film, and may cover the side surface of the polarizing film 15 with an antireflection film partially. The ratio of the area of the side surface of the polarizing film 15 with an antireflection film covered by the conduction structure with respect to the area of the whole side surface of the polarizing film 15 with an antireflection film is, for example, 1 % or more, Preferably it is 3 % or more. to be.

As a material of a conduction structure, For example, the electrically conductive paste comprised from metals, such as silver and gold|metal|money; conductive adhesive; Another electrically conductive material is mentioned. The conduction|electrical_connection structure may be wiring extended from the side surface of the polarizing film 15 with an antireflection film.

The liquid crystal panel 100 may further include other optical films other than the polarizing film 20 . As another optical film, the film used for liquid crystal display devices, such as a polarizing film, a reflecting plate, a transflective plate, retardation film, a viewing angle compensation film, and a brightness improvement film, is mentioned, for example. The retardation film includes, for example, a 1/2 wave plate, a 1/4 wave plate, and the like. The liquid crystal panel 100 may be equipped with 1 type, or 2 or more types of other optical films among these.

When the other optical film is a polarizing film, the polarizing film is bonded to the second transparent substrate 70 of the liquid crystal cell 25 via, for example, an adhesive layer. This polarizing film has the structure mentioned above with respect to the polarizing film 20, for example. Polarizing film as another optical film WHEREIN: The transmission axis (or absorption axis) of a polarizer is orthogonal to the transmission axis (or absorption axis) of the polarizer in the polarizing film 20, for example. As a material of the adhesive layer for bonding a polarizing film and the 2nd transparent substrate 70, what was mentioned above with respect to the adhesive layer 30 can be used. The thickness of this adhesive layer is not specifically limited, For example, it is 1-100 micrometers, Preferably it is 2-50 micrometers, More preferably, it is 2-40 micrometers, More preferably, it is 5-35 micrometers. .

According to the liquid crystal panel 100 of the present embodiment, the surface resistivity of the conductive layer 40 of the polarizing film 15 with an antireflection film is adjusted to 1.0×10 ⁶ Ω/□ or less, even in an environment prone to static electricity. , it is possible to prevent display defects due to charging of the liquid crystal display device. For example, the liquid crystal panel 100 shows a favorable result when ESD (Electro-Static Discharge) test is performed. The ESD test is performed, for example, by the following method. First, the liquid crystal panel 100 is set on the backlight device. Next, static electricity is applied to the viewing side (the anti-reflection film 10 side) of the liquid crystal panel 100 . For the application of static electricity, an electrostatic discharge gun in which the applied voltage is adjusted to 10 kV is used. When static electricity is applied, a part of the liquid crystal panel 100 becomes white. After the application of static electricity, the time T until the whitened portion disappears is measured. In the liquid crystal panel 100, the time T is, for example, 10 seconds or less, preferably 1 second or less, and more preferably 0.5 second or less. In addition, the ESD test is performed on 23 degreeC and 55 %RH conditions.

The present inventors, by adopting a configuration in which a conductive layer such as an ITO layer is not provided between the polarizing film 15 with an antireflection film and the liquid crystal cell 25, the reflection of light in the liquid crystal panel 100 can be greatly suppressed. newly discovered that The liquid crystal panel 100 is suitable for a use in which good visibility is required, particularly a use for a vehicle-mounted display. As a vehicle-mounted display, the panel for car navigation apparatuses, a cluster panel, a mirror display etc. are mentioned, for example. The cluster panel is a panel that displays the traveling speed of the vehicle, the rotation speed of the engine, and the like. In particular, the liquid crystal panel 100 is suitable for a use that does not require a touch sensor, for example, a cluster panel or a mirror display.

(Modified example of liquid crystal panel)

The polarizing film 15 with an antireflection film with which the liquid crystal panel 100 is equipped may further be equipped with other members other than the member mentioned above. As shown in FIG. 4 , in the liquid crystal panel 110 according to the present modification, the polarizing film 16 with an antireflection film 16 is a transparent substrate 45 disposed between the antireflection film 10 and the polarizing film 20 . ) and an adhesive layer 46 . Except for the transparent substrate 45 and the pressure-sensitive adhesive layer 46 , the structure of the liquid crystal panel 110 is the same as that of the liquid crystal panel 100 . Accordingly, elements common to the liquid crystal panel 100 and the liquid crystal panel 110 of the modified example are denoted by the same reference numerals, and descriptions thereof may be omitted in some cases. That is, the description regarding each embodiment below is applied to each other unless there is a technical contradiction. Each of the following embodiments may be combined with each other as long as there is no technical contradiction.

The transparent substrate 45 is in contact with the first high refractive index layer 1 of the antireflection film 10 , for example. However, the polarizing film 16 with an antireflection film may have the antireflection film 11 demonstrated with FIG. 3 instead of the antireflection film 10. As shown in FIG. At this time, the pressure-sensitive adhesive layer 6 of the antireflection film 11 is in contact with the transparent substrate 45 . The adhesive layer 46 is arrange|positioned between the transparent substrate 45 and the polarizing film 20, and is in contact with each of the transparent substrate 45 and the polarizing film 20, for example.

As the transparent substrate 45, what was mentioned above with respect to the 1st transparent substrate 60 and the 2nd transparent substrate 70 can be used, Preferably it is comprised from glass. In this specification, the transparent substrate 45 comprised with glass may be called "cover glass."

As the adhesive layer 46, what was mentioned above with respect to the adhesive layer 30 can be used. In particular, it is preferable that the adhesive layer 46 contains a commercially available optical clear adhesive (OCA: Optical Clear Adhesive). The adhesive layer 46 can be formed using adhesive tapes, such as LUCIACS (trademark) CS9621T, for example.

(Another modification of the liquid crystal panel)

The liquid crystal panel 100 or 110 may further include a touch sensor or a touch panel. 5 shows a liquid crystal panel 120 having a touch panel 80 . Except for the touch panel 80 , the structure of the liquid crystal panel 120 is the same as that of the liquid crystal panel 100 .

In the liquid crystal panel 120 , the touch panel 80 is disposed on the viewing side rather than the antireflection film 10 , for example. The touch panel 80 is not in contact with the polarizing film 15 with an antireflection film, but the space|gap (air layer) is formed between the touch panel 80 and the polarizing film 15 with an antireflection film. The liquid crystal panel 120 is a so-called out-cell type liquid crystal panel. As the touch panel 80 , an optical method, an ultrasonic method, a capacitive method, a resistive film method, or the like can be employed. When the touch panel 80 is a resistive film type, the touch panel 80 has, for example, a spacer interposed therebetween, and has a structure in which two electrode plates having a transparent conductive thin film are disposed to face each other. When the touch panel 80 is a capacitive type, the touch panel 80 is composed of, for example, a transparent conductive film provided with a transparent conductive thin film having a predetermined pattern shape.

(Embodiment of liquid crystal display device)

The liquid crystal display device of this embodiment is equipped with the liquid crystal panel 100 and the illumination system, for example. In the liquid crystal display device, instead of the liquid crystal panel 100 , the liquid crystal panel 110 or 120 may also be used. In a liquid crystal display device, the liquid crystal panel 100 is arrange|positioned on the visual recognition side rather than the illumination system, for example. The lighting system has, for example, a backlight or a reflector, and irradiates light to the liquid crystal panel 100 .

Example

Hereinafter, the present invention will be described in more detail by way of Examples. This invention is not limited to the Example shown below. In the following, unless otherwise specified, "%" indicates "weight %", "part" indicates "part by weight", and "thickness" indicates "physical film thickness". Unless otherwise specified, the indoor temperature and humidity are 23°C and 65%RH.

<Weight average molecular weight of (meth)acrylic polymer>

In the following examples, the weight average molecular weight (Mw) of the (meth)acrylic polymer was measured by GPC (gel permeation chromatography). Mw/Mn of the (meth)acrylic polymer was similarly measured.

Analysis device: Tosoh Corporation, HLC-8120GPC

·Column: Tosoh Corporation, G7000H _XL +GMH _XL +GMH _XL

·Column size: 7.8 mm φ × 30 cm each, 90 cm in total

·Column temperature: 40℃

Flow rate: 0.8 mL/min

・Injection amount: 100μL

·Eluent: tetrahydrofuran

Detector: Differential Refractometer (RI)

・Standard sample: polystyrene

<Adhesive layer A>

First, a monomer mixture by introducing 76.9 parts of butyl acrylate, 18 parts of benzyl acrylate, 5 parts of acrylic acid, and 0.1 parts of 4-hydroxybutyl acrylate into a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube and a cooler. got Furthermore, 0.1 parts of 2,2'- azobisisobutyronitrile as a polymerization initiator were thrown in with 100 parts of ethyl acetate with respect to 100 parts of monomer mixture (solid content). While the mixture was gently stirred, nitrogen gas was introduced into the flask to replace nitrogen. An acrylic polymer solution having a weight average molecular weight (Mw) of 2 million and Mw/Mn = 4.1 was prepared by carrying out a polymerization reaction for 8 hours while maintaining the liquid temperature in the flask at around 55°C.

Next, with respect to 100 parts of the solid content of the acrylic polymer solution, 0.45 parts of an isocyanate crosslinking agent (Coronate L manufactured by Tosoh Corporation, trimethylolpropantolylene diisocyanate), 0.1 parts of a peroxide crosslinking agent (Nyper BMT manufactured by Nippon Yushi Corporation), and 0.2 parts of a silane coupler The acrylic adhesive composition solution was prepared by further mix|blending the ring agent (KBM-403 by Shin-Etsu Chemical Co., Ltd., γ-glycidoxypropylmethoxysilane).

Next, the obtained solution was apply|coated to the single side|surface of a separator (MRF38 manufactured by Mitsubishi Chemical Polyester Film). The separator was a polyethylene terephthalate film treated with a silicone-based release agent. By drying the obtained coating film at 155 degreeC for 1 minute, the adhesive layer A was formed on the surface of a separator. The thickness of the adhesive layer A was 20 micrometers.

<Adhesive layer B>

With respect to 100 parts of the solid content of the acrylic polymer solution, 1 part of bis(trifluoromethanesulfonyl)imilithium (LiTFSI, manufactured by Mitsubishi Materials) was further blended to prepare an acrylic pressure-sensitive adhesive composition solution, except that the pressure-sensitive adhesive layer A and By the same method, the adhesive layer B was produced.

<Adhesive layer C>

First, a monomer mixture was obtained by putting 94.9 parts of butyl acrylate, 5 parts of acrylic acid, and 0.1 parts of 4-hydroxybutyl acrylate into a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube and a cooler. Moreover, 0.1 part of 2,2'- azobisisobutyronitrile as a polymerization initiator was thrown in with 100 parts of ethyl acetate with respect to 100 parts of monomer mixture (solid content). While the mixture was gently stirred, nitrogen gas was introduced into the flask to replace nitrogen. An acrylic polymer solution having a weight average molecular weight (Mw) of 2.1 million and Mw/Mn = 4.0 was prepared by maintaining the liquid temperature in the flask at around 55°C and performing a polymerization reaction for 8 hours.

Next, with respect to 100 parts of the solid content of the acrylic polymer solution, 0.45 parts of an isocyanate crosslinking agent (Coronate L manufactured by Tosoh Corporation, trimethylolpropantolylene diisocyanate), 0.1 parts of a peroxide crosslinking agent (Niper BMT manufactured by Nippon Yushi Corporation), and 0.2 parts of silane An acrylic pressure-sensitive adhesive composition solution was prepared by further adding a coupling agent (KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd., γ-glycidoxypropylmethoxysilane).

Next, the obtained solution was apply|coated to the single side|surface of a separator (MRF38 manufactured by Mitsubishi Chemical Polyester Film). The separator was a polyethylene terephthalate film treated with a silicone-based release agent. By drying the obtained coating film at 155 degreeC for 1 minute, the adhesive layer C was formed in the surface of a separator. The thickness of the adhesive layer C was 12 micrometers.

<Anti-reflection film AR1>

First, as a resin for forming the anti-glare layer, 50 parts by weight of an ultraviolet curable urethane acrylate resin (manufactured by Mitsubishi Chemical Co., Ltd., trade name "UV1700TL", solid content concentration 80% by weight), and pentaerythritol triacrylate as main components 50 parts by weight of polyfunctional acrylate (manufactured by Osaka Yuki Chemical Co., Ltd., trade name "Viscoat #300", solid content concentration 100% by weight) of Per 100 parts by weight of the solid content of these resins, 4 weights of particles containing a copolymer of (meth)acrylic acid ester and styrene (manufactured by Sekisui Chemical Co., Ltd., trade name "Techpolymer SSX504TNR", weight average particle diameter: 3.0 µm) Part, as a thixotropy imparting agent, 1.5 parts by weight of synthetic smectite (manufactured by Kunimine Kogyo Co., Ltd., trade name "Smekuton SAN"), which is an organoclay, 3 parts by weight of a photopolymerization initiator (manufactured by BASF, trade name "OMNIRAD907"), leveling 0.015 parts by weight of (DIC Co., Ltd. product, brand name "GRANDIC PC4100", solid content concentration of 10% by weight) was mixed. With respect to this mixture, it diluted with toluene/cyclopentanone mixed solvent (weight ratio 80/20) so that solid content concentration might be 50 weight%, and the material (coating liquid) for forming an antiglare layer was prepared.

Next, a triacetyl cellulose (TAC) film (manufactured by Fuji Film Co., Ltd., trade name "TD60UL") was prepared. A material (coating solution) for forming an anti-glare layer was applied to one side of this transparent plastic film (TAC film) using a bar coater to form a coating film. Next, the coating film was dried by heating the transparent plastic film on which the coating film was formed at 80 degreeC for 1 minute. Next, the hardening process was performed with respect to this coating film by irradiating the ultraviolet-ray of 300 mJ/cm<2> of accumulated light quantity with a high-pressure mercury-vapor lamp. Thereby, the 8.0-micrometer-thick anti-glare layer was formed, and the TAC film with an anti-glare layer was obtained. The haze of the TAC film with an anti-glare layer was 8 %.

Next, this TAC film with an anti-glare layer was introduced into a roll-to-roll sputtering film forming apparatus, and the surface of the anti-glare layer was subjected to bombardment treatment (plasma treatment with Ar gas) by running the film. Next, an SiO _x layer (x<2) having a physical film thickness of 3 nm (x<2) was formed as an adhesive layer on the surface of the antiglare layer. Next, on the adhesion layer, an Nb ₂ O ₅ layer having a physical film thickness of 12 nm (first high refractive index layer), a SiO ₂ layer having a physical film thickness of 29 nm (first low refractive index layer), and a physical film thickness were A 116 nm Nb ₂ O ₅ layer (second high refractive index layer) and a SiO ₂ layer (second low refractive index layer) having a physical film thickness of 78 nm were sequentially formed to prepare a laminate a. When these oxide thin films were formed, the amount of oxygen introduced was adjusted by plasma emission monitoring (PEM) control while the pressure in the apparatus was kept constant by adjusting the amount of argon introduced and the amount of exhaust.

Next, on the surface of the second low-refractive-index layer (SiO ₂ layer) of the laminate a, as an antifouling layer, a layer (physical film thickness: 9 nm) made of a fluorine-based resin was formed. Furthermore, the antireflection film AR1 was produced by transcribe|transferring the adhesive layer C on the surface of the TAC film of the laminated body a.

<Anti-reflection film AR2 to AR10>

Antireflection films AR2 to AR10 were produced in the same manner as for the antireflection film AR1, except that the physical film thickness of each layer was changed to the value shown in Table 1.

<Polarizing film P1>

First, an acrylic film was produced by the following method. In a kiln-type reactor with a capacity of 30 L equipped with a stirring device, a temperature sensor, a cooling tube, and a nitrogen introduction tube, 8,000 g of methyl methacrylate (MMA), 2,000 g of 2-(hydroxymethyl) methyl acrylate (MHMA), 10,000 g of 4-methyl-2-pentanone (methylisobutyl ketone, MIBK) and 5 g of n-dodecyl mercaptan were added. While introducing nitrogen into the reactor, the temperature of the mixture in the reactor was raised to 105° C. and refluxed. Next, while adding 5.0 g of t-butylperoxyisopropyl carbonate (Kayacarbon BIC-7, manufactured by Kayaku Corporation) as a polymerization initiator, 10.0 g of t-butylperoxyisopropylcarbonate The solution consisting of nitrate and 230 g of MIBK was dripped over 4 hours, and solution polymerization was performed. Solution polymerization was performed at about 105-120 degreeC under reflux. After the solution was added dropwise, aging was further performed for 4 hours.

Next, to the obtained polymer solution, 30 g of a stearyl phosphate/distearyl phosphate mixture (Phoslex A-18, manufactured by Sakai Chemical Co., Ltd.) was added, and the cyclization condensation reaction was carried out at about 90 to 120° C. under reflux for 5 hours. was done. Next, the obtained solution was subjected to a barrel temperature of 260° C., a rotation speed of 100 rpm, a pressure reduction degree of 13.3 to 400 hPa (10 to 300 mmHg), a vent type screw twin screw extruder (φ=29.75) with one rear vent and four fore vents. mm, L/D = 30) at a treatment rate of 2.0 kg/h in terms of the amount of resin. In the extruder, devolatilization proceeded with further cyclization condensation reaction. Thereby, the transparent pellet of a lactone ring containing polymer was obtained.

With respect to the obtained lactone ring containing polymer, when dynamic TG was measured, the mass decrease of 0.17 mass % was detected. Moreover, this lactone ring containing polymer had a weight average molecular weight of 133,000, a melt flow rate of 6.5 g/10min, and a glass transition temperature of 131 degreeC.

The obtained pellets and acrylonitrile-styrene (AS) resin (Toyo AS AS20, Toyo Styrene Co., Ltd. make) were kneaded and extruded using a single screw extruder (screw 30 mmφ) at a mass ratio of 90/10 to obtain transparent pellets. The glass transition temperature of the obtained pellets was 127 degreeC.

A film having a thickness of 120 µm was produced by melt-extruding this pellet from a coat hanger type T-die having a width of 400 mm using a 50 mm phi single screw extruder. A 30-micrometer-thick stretched film (acrylic film) was obtained by extending|stretching a film to 2.0 times in length and 2.0 times in width under 150 degreeC temperature conditions using the biaxial stretching apparatus. When the optical properties of this stretched film were measured, the total light transmittance was 93%, the in-plane retardation Δnd was 0.8 nm, and the thickness direction retardation Rth was 1.5 nm.

Next, the polarizing film P1 was produced by the following method. First, between a plurality of rolls having different speed ratios, a polyvinyl alcohol film having a thickness of 45 µm was stretched so that the draw ratio became 3 times while dyeing for 1 minute in an iodine solution having a concentration of 0.3% (temperature of 30° C.). Next, the obtained stretched film was stretched so that the total draw ratio was 6 times while immersing the resulting stretched film in an aqueous solution having a concentration of boric acid of 4% and a concentration of potassium iodide of 10% (temperature of 60°C) for 0.5 minutes. Next, the stretched film was washed by immersing it in an aqueous solution (temperature: 30°C) containing potassium iodide having a concentration of 1.5% for 10 seconds. Next, the 18-micrometer-thick polarizer was obtained by drying a stretched film at 50 degreeC for 4 minutes. A 40-micrometer-thick TAC film (made by Konica Minolta, trade name "KC4UY") was bonded to one main surface of the obtained polarizer via a polyvinyl alcohol-type adhesive agent. The 30-micrometer-thick acrylic film mentioned above was bonded to the other main surface of a polarizer via a polyvinyl alcohol-type adhesive agent. Thereby, the polarizing film P1 was obtained.

(Example 1)

First, the coating liquid whose solid content concentration is 0.5 weight% was prepared by mixing 50 parts of solutions (Denatron PT-436 manufactured by Nagase Chemtex Co., Ltd.) and 50 parts of water containing PEDOT/PSS. Next, the coating liquid was apply|coated to the surface of the acrylic film side of the polarizing film P1. The conductive layer was produced by drying the obtained coating film at 80 degreeC for 2 minutes. Thereby, the polarizing film with a conductive layer was obtained. The thickness of the conductive layer was 30 nm.

Next, the adhesive layer C of the antireflection film AR1 was bonded together on the surface of the TAC film of the polarizing film P1. Moreover, the polarizing film with an antireflection film of Example 1 which has the structure of antireflection film AR1/polarizing film P1/conductive layer/adhesive layer A was produced by transferring the adhesive layer A to the surface of a conductive layer.

(Example 2)

The polarizing film with an antireflection film of Example 2 was produced by the method similar to Example 1 except having apply|coated the coating liquid of PEDOT/PSS to the polarizing film P1 so that the thickness of a conductive layer might be set to 90 nm.

(Examples 3 to 12 and Comparative Examples 1 to 2)

In the same manner as in Example 1, except that the antireflection film, the conductive layer and the pressure-sensitive adhesive layer were changed to the combination shown in Table 2, the polarizing films with the antireflection film of Examples 3 to 12 and Comparative Examples 1 to 2 were produced. . In addition, in the comparative example 2, the adhesive layer A was directly bonded to the surface by the side of the acryl film of the polarizing film P1, without providing a conductive layer in the polarizing film P1.

(Example 13)

First, a coating liquid having a solid content concentration of 0.27 wt% was prepared by mixing 9 parts of a solution containing PEDOT/PSS (Denatron P-580W manufactured by Nagase Chemtex Co., Ltd.) and 91 parts of water. Next, the coating liquid was apply|coated to the surface of the acrylic film side of the polarizing film P1. The conductive layer was produced by drying the obtained coating film at 80 degreeC for 2 minutes. Thereby, the polarizing film with a conductive layer was obtained. The thickness of the conductive layer was 100 nm.

Next, the adhesive layer C of the antireflection film AR4 was bonded together on the surface of the TAC film of the polarizing film P1. Moreover, the polarizing film with an antireflection film of Example 13 which has the structure of antireflection film AR4/polarizing film P1/conductive layer/adhesive layer A was produced by transferring the adhesive layer A to the surface of a conductive layer.

(Comparative Example 3)

First, 8.6 parts of a solution containing PEDOT/PSS (Denatron P-580W manufactured by Nagase Chemtex Co., Ltd.), and 1 part of a solution containing an oxazoline group-containing acrylic polymer (trade name: Epocross WS-700, manufactured by Nippon Shokubai) and 90.4 parts of water were mixed to prepare a coating liquid (solid content concentration of 0.5% by weight) for forming a conductive layer. The obtained coating liquid WHEREIN: The density|concentration of a polythiophene type polymer was 0.04 weight%, and the density|concentration of an oxazoline group containing acrylic polymer was 0.25 weight%.

Next, the obtained coating liquid was apply|coated to the main surface by the side of the acrylic film of the polarizing film P1. The conductive layer was produced by drying the obtained coating film at 80 degreeC for 2 minutes. Thereby, the polarizing film with a conductive layer was obtained. The thickness of the conductive layer was 60 nm.

Next, the adhesive layer C of the antireflection film AR10 was bonded together on the surface of the TAC film of the polarizing film P1. Moreover, the polarizing film with an antireflection film of the comparative example 3 which has the structure of antireflection film AR10/polarizing film P1/conductive layer/adhesive layer A was produced by transferring the adhesive layer A to the surface of a conductive layer.

<Optical properties of polarizing film with anti-reflection film>

With respect to the polarizing film with antireflection film obtained in Examples and Comparative Examples, in a state in which the pressure-sensitive adhesive layer is laminated with alkali-free glass so that it is in direct contact with the alkali-free glass, light from the CIE standard light source D65 is incident from the antireflection film. The method described above for the luminous reflectance Y, L ^* value, a ^* value and b ^* value of the reflected light, and the color difference ΔE between light and reflected light satisfying L ^* value=0, a ^* value=0 and b ^* value=0 was evaluated by At this time, the polarizing film with an antireflection film was cut out into the square whose one side is 50 mm, and was used. As the alkali-free glass, EG-XG (thickness 0.7 mm) manufactured by Corning Corporation was used. As a black film, the thing made from polyethylene terephthalate (PET) was used. The spectral reflectance was measured using a spectrophotometer (manufactured by Konica Minolta, trade name "CM2600D"). The evaluation sample for evaluating an optical characteristic had the structure of polarizing film with antireflection film/alkali free glass/black PET film. However, about the polarizing film with an antireflection film of the comparative example 1, the reflected light was evaluated using the alkali free glass in which the amorphous ITO layer (thickness 20 nm) was formed in the surface. That is, in the comparative example 1, the evaluation sample had the structure of polarizing film with antireflection film/ITO layer/alkali free glass/black PET film. Sputtering was used for preparation of the ITO layer. The Sn ratio of ITO contained in the ITO layer was 3 weight%. The Sn ratio was calculated from the weight/(weight of Sn atom + weight of In atom) of Sn atoms in ITO.

<Optical properties of anti-reflection film>

For the antireflection films AR1 to AR10, the luminous reflectance Y ₁ , a ₁ ^* value, and b ₁ ^* value of the reflected light generated when light from the CIE standard light source D65 was incident was evaluated by the method described above. The black film, the spectrophotometer, etc. used the thing similar to what was used for evaluation of the optical characteristic of the polarizing film with an antireflection film.

<Surface resistivity of adhesive layer>

The surface resistivity (Ω/□) of the pressure-sensitive adhesive layers A and B was measured at the stage in which the pressure-sensitive adhesive layer A or B was formed on the surface of the separator. For the measurement of the surface resistivity, a resistivity meter (Hiresta-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech) was used. As for measurement conditions, the applied voltage was 250 V, and the application time was 10 seconds.

<Surface resistivity of conductive layer>

In an Example and a comparative example, the surface resistivity (Ω/□) of the conductive layer was measured at the stage in which the conductive layer was formed in the surface of the polarizing film P1. In Example 13 and Comparative Example 3, the measurement of the surface resistivity of the conductive layer used a resistivity meter (Hiresta-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech Co., Ltd.) and conformed to the method specified in JIS K6911:1995. was done. The measurement conditions were that the applied voltage was 10 V and the application time was 10 seconds. In Examples 1 to 12 and Comparative Example 1, the measurement of the surface resistivity of the conductive layer uses a resistivity meter (Loresta-GP MCP-T600 manufactured by Mitsubishi Chemical Analytech), and the method specified in JIS K7194:1994 was carried out in accordance with The measurement conditions were that the applied voltage was 10 V and the application time was 10 seconds.

<Surface resistivity of polarizing film>

In the comparative example 2, based on the method prescribed|regulated to JISK6911:1995, the surface resistivity of the polarizing film P1 was measured using the resistivity meter (The Mitsubishi Chemical Analytech company Hiresta-UP MCP-HT450). The measurement conditions were that the applied voltage was 10 V and the application time was 10 seconds. The surface resistivity of the polarizing film P1 exceeded 1.0×10 ¹⁴ Ω/□.

<Loss A of total light transmittance due to conductive layer>

First, the total light transmittance T1 of the polarizing film P1 was measured using the spectrophotometer (Nippon Bunko Corporation V7100) based on the prescription|regulation of JISK7361-1:1997. In the same manner, at the stage in which the conductive layer was formed on the surface of the polarizing film P1, the total light transmittance T2 of the laminate L consisting of the polarizing film P1 and the conductive layer was measured. The total light transmittance T2 of the laminated body L was measured by injecting light from the polarizing film P1 side. The difference (T1-T2) of the total light transmittance T1 of the polarizing film P1 and the total light transmittance T2 was computed, and the calculated value obtained was regarded as the loss A of the total light transmittance by a conductive layer.

<ESD Test>

First, the polarizing film with an antireflection film obtained by the Example and the comparative example was bonded together on the surface of the visual recognition side of a liquid crystal cell, and the liquid crystal panel was produced. However, for Comparative Example 1, a liquid crystal cell in which an amorphous ITO layer (thickness 20 nm) was formed on the surface was used. That is, in the comparative example 1, the liquid crystal panel had the structure of polarizing film/ITO layer/liquid crystal cell with antireflection film. Sputtering was used for preparation of the ITO layer. The Sn ratio of ITO contained in the ITO layer was 3 weight%. Next, the silver paste was apply|coated in 5 mm width|variety so that the side surface of the polarizing film with an antireflection film might be covered. By drying the silver paste, a conductive structure composed of silver was formed. Through this conduction structure, the liquid crystal panel was electrically connected to an external ground electrode. Next, the liquid crystal panel was set on the backlight device. Next, static electricity was applied to the viewing side (anti-reflection film side) of the liquid crystal panel using an electrostatic discharge (ESD) gun whose applied voltage was adjusted to 10 kV. Thereby, a part of the liquid crystal panel became white. After the application of static electricity, the time T until the whitened portion disappeared was measured. In Table 2, the results of the ESD test were evaluated based on the following criteria regarding time T. In addition, the ESD test was performed on 23 degreeC and 55 %RH conditions.

(Evaluation standard)

A: 0.5 seconds or less

B: Exceeds 0.5 second and less than 1 second

C: More than 1 second and less than 10 seconds

D: Exceeded 10 seconds

<Color>

The liquid crystal panel produced in the ESD test was visually observed from the visual side (anti-reflection film side) to evaluate the color tone. In the item of color in Table 2, A means that no color is confirmed. B means that very little color was confirmed. C means that a little color was confirmed. D means that the color was confirmed.

As can be seen from Table 2, the polarizing films with an antireflection film of Examples 1 to 13 having a conductive layer having a surface resistivity of 1.0 × 10 ⁶ Ω/□ or less have better ESD test results than Comparative Examples 2 and 3 Therefore, it is estimated that charging of the liquid crystal panel can be sufficiently suppressed. From the results of the ESD test of Example 3 and Comparative Example 1, it was found that by using the adhesive layer to which the conductive material was added together with the conductive layer, the charging of the liquid crystal panel can be sufficiently suppressed compared to the case where the ITO layer is used. can

Moreover, in the liquid crystal panel provided with the polarizing film with an antireflection film of Examples 1-13 whose value of the luminous reflectance Y of reflected light is sufficiently low, reflection of light was fully suppressed. It is estimated that these liquid crystal panels are suitable for improving the visibility of a liquid crystal display device. On the other hand, in the comparative example 1, the luminous reflectance Y was raised largely by presence of an ITO layer, and reflection of the light in a liquid crystal panel could not fully be suppressed.

The liquid crystal panel of this invention can be used suitably for the use by which favorable visibility is calculated|required, for example, uses, such as an in-vehicle display.

Claims (15)

A polarizing film with an antireflection film which has an antireflection film, a polarizing film, and an adhesive layer in this order in a lamination direction, and further has a conductive layer;
liquid crystal cell
to provide
A conductive layer is not provided between the polarizing film with an antireflection film and the liquid crystal cell,
The surface resistivity of the conductive layer of the polarizing film with an antireflection film is 1.0×10 ⁶ Ω/□ or less,
The polarizing film with an anti-reflection film, when the pressure-sensitive adhesive layer is laminated with the alkali-free glass so that it is in direct contact with the alkali-free glass, light from the CIE standard light source D65 is incident from the surface opposite to the pressure-sensitive adhesive layer, A liquid crystal panel that generates reflected light having a luminous reflectance Y of 1.1% or less. According to claim 1,
The said conductive layer which the said polarizing film with an antireflection film has is arrange|positioned between the said polarizing film and the said adhesive layer, The liquid crystal panel. 3. The method of claim 1 or 2,
The liquid crystal panel, wherein the surface resistivity is 1.0×10 ⁴ Ω/□ or less. 4. The method according to any one of claims 1 to 3,
The liquid crystal panel, wherein the surface resistivity is greater than 5.0×10 ² Ω/□. 5. The method according to any one of claims 1 to 4,
The luminous reflectance Y is 0.9% or less, the liquid crystal panel. 6. The method according to any one of claims 1 to 5,
The liquid crystal panel whose loss of total light transmittance by the said conductive layer which the said polarizing film with an antireflection film has is 0.9 % or less. 7. The method according to any one of claims 1 to 6,
A liquid crystal panel wherein the a ^* value and the b ^* value in the L ^* a ^* b ^* color space system of the reflected light satisfy the following relational expressions (1) and (2).

8. The method of claim 7,
The a ^* value is -6 or more and 6 or less, the liquid crystal panel. 9. The method of claim 8,
The a ^* value is -3 or more and 3 or less, the liquid crystal panel. 10. The method according to any one of claims 7 to 9,
wherein the b ^* value is -15 or more and 3 or less. 11. The method of claim 10,
The b ^* value is -10 or more and 2 or less, the liquid crystal panel. 12. The method of claim 11,
wherein the b ^* value is -6 or more and 2 or less. 13. The method according to any one of claims 1 to 12,
The said antireflection film has a 1st high refractive index layer, a 1st low refractive index layer, a 2nd high refractive index layer, and a 2nd low refractive index layer in this order in a lamination direction, The liquid crystal panel. 14. The method of claim 13,
The optical film thickness of the first high refractive index layer is 20 nm to 35 nm,
The optical film thickness of the first low refractive index layer is 38 nm to 50 nm,
An optical film thickness of the second high refractive index layer is 230 nm to 290 nm,
An optical film thickness of the second low refractive index layer is 100 nm to 128 nm, a liquid crystal panel. 15. The method according to any one of claims 1 to 14,
A liquid crystal panel comprising a conductive material in the pressure-sensitive adhesive layer.

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