WO2017170019A1 - Ensemble de plaques de polarisation, et afficheur à cristaux liquides en mode ips utilisant cet ensemble - Google Patents

Ensemble de plaques de polarisation, et afficheur à cristaux liquides en mode ips utilisant cet ensemble Download PDF

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Publication number
WO2017170019A1
WO2017170019A1 PCT/JP2017/011362 JP2017011362W WO2017170019A1 WO 2017170019 A1 WO2017170019 A1 WO 2017170019A1 JP 2017011362 W JP2017011362 W JP 2017011362W WO 2017170019 A1 WO2017170019 A1 WO 2017170019A1
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WIPO (PCT)
Prior art keywords
plate
liquid crystal
polarizing plate
side polarizing
positive
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PCT/JP2017/011362
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English (en)
Japanese (ja)
Inventor
寿和 松本
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住友化学株式会社
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Priority claimed from JP2016217007A external-priority patent/JP2018060149A/ja
Priority claimed from JP2016217006A external-priority patent/JP6699513B2/ja
Priority claimed from JP2016217009A external-priority patent/JP6699514B2/ja
Priority claimed from JP2016217010A external-priority patent/JP2018060152A/ja
Application filed by 住友化学株式会社 filed Critical 住友化学株式会社
Priority to KR1020187030437A priority Critical patent/KR102290943B1/ko
Priority to CN201780021170.XA priority patent/CN108885369B/zh
Publication of WO2017170019A1 publication Critical patent/WO2017170019A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent

Definitions

  • the present invention relates to a polarizing plate and an IPS mode liquid crystal display device using the same.
  • liquid crystal displays In recent years, low-power consumption, low-voltage, light-weight and thin liquid crystal displays are rapidly spreading as information display devices such as mobile phones, portable information terminals, computer monitors, and televisions. With the development of liquid crystal technology, liquid crystal displays in various modes have been proposed, and problems with liquid crystal displays such as response speed, contrast, and narrow viewing angle are being solved.
  • liquid crystal display devices equipped with a conventional liquid crystal cell and a conventional polarizing plate set do not A problem has arisen that the liquid crystal screen is difficult to see because of strong reflection.
  • the visibility is remarkably lowered in an environment where the illuminance of outside light exceeds 5000 lux only with the low reflection layer.
  • the in-plane retardation value is usually 250 nm to 380 nm, and it is difficult to dispose a circularly polarizing plate as the viewing side polarizing plate.
  • An object of the present invention is to provide a set of polarizing plates for a specific IPS mode liquid crystal cell and an IPS mode liquid crystal display device using the same, which can ensure good visibility even in an environment where the illuminance of external light exceeds 5000 lux. There is to do.
  • Embodiment 1 A set of polarizing plates for bonding to both surfaces of an IPS mode liquid crystal cell having an in-plane retardation value of 100 nm to 200 nm, comprising a viewing side polarizing plate and a back side polarizing plate, The absorption axis of the polarizing plate and the absorption axis of the back side polarizing plate are substantially orthogonal,
  • the viewing side polarizing plate has a polarizer and a ⁇ / 4 plate, The angle formed by the absorption axis of the viewing side polarizing plate and the slow axis of the ⁇ / 4 plate is approximately 45 °,
  • An IPS mode liquid crystal display device in which the set of polarizing plates according to any one of [1] to [4] is disposed in an IPS mode liquid crystal cell having an in-plane retardation value of 100 nm to 200 nm.
  • the IPS mode liquid crystal display device according to [5] wherein the size of the IPS mode liquid crystal display device is not more than 15 inches diagonal.
  • the viewing side polarizing plate has a polarizer and a ⁇ / 4 plate, The angle formed by the absorption axis of the viewing side polarizing plate and the slow axis of the ⁇ / 4 plate is approximately 45 °,
  • An IPS mode liquid crystal display device comprising a set of polarizing plates according to any one of [7] to [10] arranged in an IPS mode liquid crystal cell having an in-plane retardation value of 400 nm to 500 nm.
  • the viewing side polarizing plate has a first polarizer and a ⁇ / 4 plate, The ⁇ / 4 plate is disposed between the first polarizer and the liquid crystal cell,
  • the angle formed by the absorption axis of the viewing side polarizing plate and the slow axis of the ⁇ / 4 plate is approximately 45 °,
  • the back side polarizing plate has a second polarizer and a ⁇ / 2 plate, The angle formed by the absorption axis of the back side polarizing plate and the slow axis of the ⁇ /
  • the viewing side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 4 plate, The set of polarizing plates according to [13], wherein the back-side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 2 plate.
  • the viewing side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 4 plate, The set of polarizing plates according to [13], wherein the back-side polarizing plate includes a positive C plate disposed between the second polarizer and the ⁇ / 2 plate.
  • the viewing-side polarizing plate includes a positive C plate disposed between the first polarizer and the ⁇ / 4 plate, The set of polarizing plates according to [13], wherein the back-side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 2 plate.
  • the viewing-side polarizing plate includes a positive C plate disposed between the first polarizer and the ⁇ / 4 plate, The set of polarizing plates according to [13], wherein the back-side polarizing plate includes a positive C plate disposed between the second polarizer and the ⁇ / 2 plate.
  • the viewing side polarizing plate has a first polarizer and a ⁇ / 4 plate, The ⁇ / 4 plate is disposed between the first polarizer and the liquid crystal cell,
  • the angle formed by the absorption axis of the viewing side polarizing plate and the slow axis of the ⁇ / 4 plate is approximately 45 °,
  • the back side polarizing plate has a second polarizer and a ⁇ / 2 plate, The angle formed by the absorption axis of the back side polarizing plate and the slow axis of the ⁇ /
  • the viewing side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 4 plate, The set of polarizing plates according to [22], wherein the back side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 2 plate.
  • the viewing side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 4 plate, The set of polarizing plates according to [22], wherein the back-side polarizing plate includes a positive C plate disposed between the second polarizer and the ⁇ / 2 plate.
  • the viewing-side polarizing plate includes a positive C plate disposed between the first polarizer and the ⁇ / 4 plate, The set of polarizing plates according to [22], wherein the back side polarizing plate includes a positive C plate disposed between the liquid crystal cell and the ⁇ / 2 plate.
  • the viewing-side polarizing plate includes a positive C plate disposed between the first polarizer and the ⁇ / 4 plate, The set of polarizing plates according to [22], wherein the back-side polarizing plate includes a positive C plate disposed between the second polarizer and the ⁇ / 2 plate.
  • the set of polarizing plates of the present invention it is possible to provide a liquid crystal display device that can suppress reflection of external light and ensure good visibility even in an environment with strong external light such as outdoors. .
  • FIGS. 1A to 1B are schematic cross-sectional views showing examples of preferable layer structures in polarizing plates according to Embodiments 1 and 2 of the present invention.
  • the polarizing plate set shown in FIGS. 1A to 1B includes a viewing side polarizing plate 10 in which a ⁇ / 4 plate 34 and a positive C plate 35 are laminated on one side of a polarizing plate 30, and a back side polarizing plate.
  • 20 includes one in which the brightness enhancement film 61 is laminated on one surface of the polarizing plate 50.
  • FIGS. 2A to 2D are schematic cross-sectional views showing examples of preferable layer structures in the polarizing plates according to Embodiments 3 and 4 of the present invention.
  • the polarizing plate set shown in FIGS. 2A to 2D is a viewing side polarizing plate 10 in which a ⁇ / 4 plate 34 and a positive C plate 35 are laminated on one side of a polarizing plate 30, and a back side polarizing plate.
  • 20 includes a laminate in which a ⁇ / 2 plate 54 and a positive C plate 55 are laminated on one side of a polarizing plate 50, and a brightness enhancement film 61 is laminated on the other side of the polarizing plate 50.
  • the viewing side polarizing plate and the back side polarizing plate of the present invention include a polarizing plate 30 and a polarizing plate 50.
  • the polarizers 32 (first polarizer 32 ′) and 52 (second polarizer 52 ′) are usually a step of uniaxially stretching a polyvinyl alcohol resin film, and the polyvinyl alcohol resin film is dyed with a dichroic dye.
  • polyvinyl alcohol resin a saponified polyvinyl acetate resin
  • examples of the polyvinyl acetate resin include, in addition to polyvinyl acetate, which is a homopolymer of vinyl acetate, copolymers with other monomers copolymerizable with vinyl acetate.
  • examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and acrylamides having an ammonium group.
  • the degree of saponification of the polyvinyl alcohol-based resin is usually about 85 to 100 mol%, preferably 98 mol% or more.
  • This polyvinyl alcohol resin may be modified, and for example, polyvinyl formal and polyvinyl acetal modified with aldehydes can also be used.
  • the degree of polymerization of the polyvinyl alcohol resin is usually about 1,000 to 10,000, preferably about 1,500 to 5,000.
  • a film obtained by forming such a polyvinyl alcohol resin is used as a raw film of the polarizer 32 (first polarizer 32 ') and 52 (second polarizer 52').
  • the method for forming a polyvinyl alcohol-based resin is not particularly limited, and can be formed by a known method.
  • the film thickness of the polyvinyl alcohol-based raw film is not particularly limited, but is about 10 ⁇ m to 150 ⁇ m, for example.
  • the uniaxial stretching of the polyvinyl alcohol-based resin film can be performed before, simultaneously with, or after the dyeing of the dichroic dye.
  • this uniaxial stretching may be performed before boric acid treatment or during boric acid treatment. Moreover, you may uniaxially stretch in these several steps.
  • rolls having different peripheral speeds may be uniaxially stretched or may be stretched uniaxially using a hot roll.
  • the uniaxial stretching may be dry stretching in which stretching is performed in the air, or may be wet stretching in which stretching is performed in a state where a solvent is used and the polyvinyl alcohol-based resin film is swollen.
  • the draw ratio is usually about 3 to 8 times.
  • a method for dyeing a polyvinyl alcohol resin film with a dichroic dye for example, a method of immersing the polyvinyl alcohol resin film in an aqueous solution containing the dichroic dye is employed. Specifically, iodine or a dichroic dye is used as the dichroic dye. In addition, it is preferable that the polyvinyl alcohol-type resin film performs the immersion process to water before a dyeing process.
  • iodine When iodine is used as the dichroic dye, a method of dyeing a polyvinyl alcohol-based resin film in an aqueous solution containing iodine and potassium iodide is usually employed.
  • the content of iodine in this aqueous solution is usually about 0.01 to 1 part by weight per 100 parts by weight of water.
  • the content of potassium iodide is usually about 0.5 to 20 parts by weight per 100 parts by weight of water.
  • the temperature of the aqueous solution used for dyeing is usually about 20 to 40 ° C.
  • the immersion time (dyeing time) in this aqueous solution is usually about 20 to 1,800 seconds.
  • a method of immersing and dyeing a polyvinyl alcohol-based resin film in an aqueous solution containing a water-soluble dichroic dye is usually employed.
  • the content of the dichroic dye in this aqueous solution is usually about 1 ⁇ 10 ⁇ 4 to 10 parts by weight per 100 parts by weight of water, and preferably about 1 ⁇ 10 ⁇ 3 to 1 part by weight.
  • This aqueous solution may contain an inorganic salt such as sodium sulfate as a dyeing assistant.
  • the temperature of the aqueous dichroic dye solution used for dyeing is usually about 20 to 80 ° C.
  • the immersion time (dyeing time) in this aqueous solution is usually about 10 to 1,800 seconds.
  • the boric acid treatment after dyeing with a dichroic dye can usually be performed by immersing the dyed polyvinyl alcohol resin film in a boric acid-containing aqueous solution.
  • the amount of boric acid in the boric acid-containing aqueous solution is usually about 2 to 15 parts by weight per 100 parts by weight of water, and preferably 5 to 12 parts by weight.
  • the boric acid-containing aqueous solution preferably contains potassium iodide.
  • the amount of potassium iodide in the boric acid-containing aqueous solution is usually about 0.1 to 15 parts by weight and preferably about 5 to 12 parts by weight per 100 parts by weight of water.
  • the immersion time in the boric acid-containing aqueous solution is usually about 60 to 1,200 seconds, preferably about 150 to 600 seconds, and more preferably about 200 to 400 seconds.
  • the temperature of the boric acid-containing aqueous solution is usually 50 ° C. or higher, preferably 50 to 85 ° C., more preferably 60 to 80 ° C.
  • the polyvinyl alcohol resin film after the boric acid treatment is usually washed with water.
  • the water washing treatment can be performed, for example, by immersing a boric acid-treated polyvinyl alcohol resin film in water.
  • the temperature of water in the water washing treatment is usually about 5 to 40 ° C.
  • the immersion time is usually about 1 to 120 seconds.
  • a drying process is performed to obtain polarizers 32 (first polarizer 32 ') and 52 (second polarizer 52').
  • the drying process can be performed using a hot air dryer or a far infrared heater.
  • the temperature for the drying treatment is usually about 30 to 100 ° C., preferably 50 to 80 ° C.
  • the drying treatment time is usually about 60 to 600 seconds, and preferably 120 to 600 seconds.
  • the moisture content of the polarizer 32 (first polarizer 32 ') and 52 (second polarizer 52') is reduced to a practical level.
  • the water content is usually 5 to 20% by weight, preferably 8 to 15% by weight.
  • the flexibility of the polarizers 32 (first polarizer 32 ′) and 52 (second polarizer 52 ′) is lost, and the polarizer 32 (first polarizer) is lost.
  • 32 ′) and 52 (second polarizer 52 ′) may be damaged or break after drying. If the moisture content exceeds 20% by weight, the thermal stability of the polarizers 32 (first polarizer 32 ') and 52 (second polarizer 52') may be inferior.
  • a polarizer having a dichroic dye adsorbed and oriented on a polyvinyl alcohol resin film can be produced.
  • the stretching, dyeing, boric acid treatment, water washing step, and drying step of the polyvinyl alcohol-based resin film in the production process of the polarizer may be performed in accordance with, for example, the method described in JP2012-159778A. . It is also useful to use a method of forming a polyvinyl alcohol resin layer serving as a polarizer by coating a base film with a polyvinyl alcohol resin as in the method described in this document.
  • the thickness of the polarizer is preferably 15 ⁇ m or less, and more preferably 12 ⁇ m or less.
  • the thickness of the polarizer is usually 3 ⁇ m or more in that good optical properties can be imparted.
  • the polarizer preferably has a shrinkage force of 2 N / 2 mm or less per 2 mm width in the absorption axis direction when held at 80 ° C. for 240 minutes. If the shrinkage force is greater than 2N / 2 mm, the amount of dimensional change under a high temperature environment increases, and the shrinkage force of the polarizer increases, so that the ⁇ / 2 plate and the ⁇ / 4 plate are easily distorted. Tends to cause cracks in the polarizer. The contraction force of the polarizer tends to be 2N / 2 mm or less when the draw ratio is lowered and when the thickness of the polarizer is reduced. The measuring method of contraction force follows the method of the below-mentioned Example.
  • a protective film is preferably laminated on at least one surface of the polarizer, and may have a protective film on both surfaces.
  • the protective films 31a, 31b, 51a, 51b can be made of a transparent resin film.
  • the transparent resin film means a resin film having a single transmittance of 80% or more in the visible light region.
  • the protective films 31b and 51b can be omitted by providing the positive C plates 35 and 55, the ⁇ / 4 plate 34, and the ⁇ / 2 plate 54 as a protective film, so that the polarizing plate can be thinned. It is an effective means. Similarly, omitting the protective film 51a by providing the brightness enhancement film 61 as a protective film is also an effective means for reducing the thickness of the polarizing plate.
  • protective films 31a, 31b, 51a, 51b As the protective films 31a, 31b, 51a, 51b, cellulose-based resins, chain polyolefin-based resins, cyclic polyolefin-based resins, acrylic resins, polyimide-based resins, polycarbonate-based resins, polyester-based resins, and the like have been conventionally used in this field.
  • a film formed from a material widely used as a forming material can be used.
  • These resins may contain appropriate additives as long as the transparency is not impaired. Additives such as antioxidants, ultraviolet absorbers, antistatic agents, lubricants, nucleating agents, antifogging agents, antiblocking agents, phase difference reducing agents, stabilizers, processing aids, plasticizers, impact aids , Matting agents, antibacterial agents, fungicides and the like. A plurality of these additives may be used in combination.
  • any optimum method may be appropriately selected.
  • a solvent cast method in which a resin dissolved in a solvent is cast on a metal band or drum, and the solvent is removed by drying to obtain a film.
  • the resin is heated above its melting temperature, kneaded and extruded from a die.
  • a melt extrusion method for obtaining a film by cooling can be used.
  • a single layer film can be extruded or a multilayer film can be coextruded.
  • a retardation film obtained by performing a stretching process on the film for improving the visibility when the screen is viewed through polarized sunglasses may be used as the protective film 31a.
  • the retardation plate it is desirable to arrange the retardation plate so that the angle formed by the slow axis of the ⁇ / 4 plate and the absorption axis of the polarizing film is about 45 °.
  • the angle formed by the slow axis of the ⁇ / 4 plate and the absorption axis of the polarizing film is about 45 °.
  • stacking with the polarizing film on long when the angle
  • the protective film 31a may have a surface treatment layer 36 on the surface opposite to the surface bonded to the polarizer 32 (first polarizer 32 ′).
  • Examples of the surface treatment layer 36 include a hard coat layer having a fine surface irregularity shape.
  • the hard coat layer preferably has a pencil hardness higher than H. If the pencil hardness is H or smaller, the surface is likely to be scratched, and if the pencil hardness is scratched, the visibility of the liquid crystal display device is deteriorated.
  • Pencil hardness is determined according to JIS K 5600-5-4: 1999 “General test methods for paints – Part 5: Mechanical properties of coating films – Section 4: Scratch hardness (pencil method)”. It is represented by the hardness of the hardest pencil that does not cause scratches when scratched with a pencil.
  • the protective film 31a having the surface treatment layer 36 preferably has a haze value in the range of 0.1 to 45%, more preferably in the range of 5 to 40%.
  • a haze value is determined in accordance with “JIS K 7136: 2000“ Plastics—Method for determining haze of transparent material ”.
  • the hard coat layer with fine surface irregularities forms a method of forming a coating film containing organic fine particles or inorganic fine particles on the surface of the resin film, or a coating film containing or not containing organic fine particles or inorganic fine particles. Then, it can be formed by a method of pressing against a roll having an uneven shape, such as an embossing method.
  • a coating film can be formed by, for example, a method of applying a coating liquid (curable resin composition) containing a binder component made of a curable resin and organic fine particles or inorganic fine particles to the surface of the resin film. .
  • the protective film 31a has various additional surface treatments such as an antireflection layer, an antistatic treatment, an antifouling treatment, or an antibacterial treatment. It may be applied, and a coating layer made of a liquid crystalline compound or a high molecular weight compound thereof may be formed. In particular, when an antireflection layer having a reflectance of 3% or less is formed, it is preferably used because visibility can be maintained even at 10000 Lux or more.
  • the antistatic function may be imparted to other portions of the polarizing plate such as an adhesive layer.
  • a cellulose resin or a cyclic polyolefin resin is preferable because the retardation value can be easily controlled and is easily available.
  • the cellulose resin may be an organic acid ester or mixed organic acid ester of cellulose in which part or all of the hydrogen atoms in the hydroxyl group of cellulose are substituted with an acetyl group, a propionyl group and / or a butyryl group.
  • examples include cellulose acetate, propionate, butyrate, and mixed esters thereof. Of these, triacetyl cellulose, diacetyl cellulose, cellulose acetate propionate, cellulose acetate butyrate and the like are preferable.
  • the cyclic polyolefin resin is obtained by polymerizing cyclic olefin monomers such as norbornene and other cyclopentadiene derivatives in the presence of a catalyst.
  • cyclic olefin-based resin When such a cyclic polyolefin-based resin is used, a protective film having a predetermined retardation value described later can be easily obtained.
  • cyclic polyolefin-based resin for example, ring-opening metathesis polymerization is performed from cyclopentadiene and olefins or (meth) acrylic acid or esters thereof using norbornene obtained by Diels-Alder reaction or a derivative thereof as a monomer.
  • a cyclic olefin such as norbornene, tetracyclododecene, or a derivative thereof with a
  • any optimum method may be appropriately selected.
  • a solvent cast method in which a resin dissolved in a solvent is cast on a metal band or drum, and the solvent is removed by drying to obtain a film.
  • the resin is heated above its melting temperature, kneaded and extruded from a die.
  • a melt extrusion method for obtaining a film by cooling can be used.
  • a single layer film can be extruded or a multilayer film can be coextruded.
  • the protective films 31b and 51b preferably have a thickness direction retardation value Rth of 10 nm or less in order to suppress a decrease in the degree of polarization due to depolarization.
  • the retardation value Rth in the thickness direction is a value obtained by multiplying the value obtained by subtracting the refractive index in the thickness direction from the in-plane average refractive index, and is defined by the following formula (a).
  • the in-plane retardation value Re is preferably 10 nm or less.
  • the in-plane retardation value Re is a value obtained by multiplying the in-plane refractive index difference by the film thickness, and is defined by the following formula (b).
  • Rth [(n x + ny ) / 2 ⁇ n z ] ⁇ d (a)
  • Re (n x ⁇ n y ) ⁇ d (b)
  • n x is a refractive index in x-axis direction in the film plane (in-plane slow axis direction)
  • n y is a y-axis direction (in-plane fast axis direction in the film plane, the plane In the direction perpendicular to the x-axis)
  • nz is the refractive index in the z-axis direction (thickness direction) perpendicular to the film surface
  • d is the thickness of the film.
  • the phase difference value can be a value at an arbitrary wavelength in the range of about 500 to 650 nm near the center of visible light, but in this specification, the phase difference value at a wavelength of 590 nm is used as a standard.
  • the retardation value Rth in the thickness direction and the in-plane retardation value Re can be measured using various commercially available retardation meters.
  • Examples of a method for controlling the in-plane and thickness direction retardation value Rth of the resin film within a range of 10 nm or less include a method of minimizing the distortion remaining in the in-plane and thickness directions as much as possible.
  • a method of relaxing residual shrinkage strain in the plane and in the thickness direction generated when the cast resin solution is dried by heat treatment can be employed.
  • the melt extrusion method the distance from the die to the cooling drum is reduced as much as possible in order to prevent the resin film from being drawn from the die and cooled, and the extrusion amount and the rotation speed of the cooling drum are reduced.
  • a method of controlling the film so that the film is not stretched can be employed.
  • the method of relieving the distortion which remains in the obtained film by heat processing similarly to the solvent casting method is also employable.
  • the ⁇ / 4 plate 34 is particularly preferably made of a material excellent in transparency, mechanical strength, thermal stability, moisture shielding properties, and the like.
  • polyolefin resin such as chain polyolefin resin (polypropylene resin, etc.), cyclic polyolefin resin (norbornene resin, etc.); cellulose resin such as cellulose ester resin, such as cellulose triacetate and cellulose diacetate; Polyester resin; polycarbonate resin; (meth) acrylic resin; polystyrene resin; liquid crystal composition; or a mixture or copolymer thereof.
  • a film made of a polycarbonate resin and a liquid crystal composition is preferably used because it has a positive wavelength dispersion.
  • positive wavelength dispersion means that the following formula (c) is satisfied.
  • the number in parentheses is the measurement wavelength (unit: nm) of the phase difference value.
  • the retardation value of the ⁇ / 4 plate means that the retardation value Re is 120 nm to 160 nm at a measurement wavelength of 590 nm.
  • ⁇ / 4 plate may be blended with appropriate additives as long as transparency is not impaired.
  • Additives such as antioxidants, ultraviolet absorbers, antistatic agents, lubricants, nucleating agents, antifogging agents, antiblocking agents, phase difference reducing agents, stabilizers, processing aids, plasticizers, impact aids , Matting agents, antibacterial agents, fungicides and the like. A plurality of these additives may be used in combination.
  • Polycarbonate resin refers to aromatic polycarbonate.
  • a polycarbonate resin is a method in which a dihydric phenol and a carbonate precursor are reacted by an interfacial polycondensation method or a melt transesterification method; a method in which a carbonate prepolymer is polymerized by a solid phase transesterification method; It can be obtained by a method of polymerizing by a ring-opening polymerization method.
  • dihydric phenols examples include bisphenol A, 2,2-bis ⁇ (4-hydroxy-3-methyl) phenyl ⁇ propane, 2,2-bis (4-hydroxyphenyl) butane, and 2,2-bis (4-hydroxy). Phenyl) -3-methylbutane, 2,2-bis (4-hydroxyphenyl) -3,3-dimethylbutane, 2,2-bis (4-hydroxyphenyl) -4-methylpentane, 1,1-bis (4 Single weight obtained from at least one dihydric phenol selected from the group consisting of -hydroxyphenyl) -3,3,5-trimethylcyclohexane and ⁇ , ⁇ '-bis (4-hydroxyphenyl) -m-diisopropylbenzene Polymers or copolymers are preferred, especially bisphenol A homopolymers and 1,1-bis (4-hydroxyphenyl) ) -3,3,5-trimethylcyclohexane and bisphenol A, 2,2-bis ⁇ (4-hydroxy-3-methyl) phenyl ⁇ propane and
  • carbonate precursor carbonyl halide, carbonate ester, haloformate or the like is used, and specific examples include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol, and the like.
  • any optimum method may be appropriately selected.
  • a solvent cast method in which a resin dissolved in a solvent is cast on a metal band or drum, and the solvent is removed by drying to obtain a film.
  • the resin is heated above its melting temperature, kneaded and extruded from a die.
  • a melt extrusion method for obtaining a film by cooling can be used.
  • a single layer film can be extruded or a multilayer film can be coextruded.
  • Stretching can employ any optimum stretching method such as uniaxial stretching / sequential biaxial stretching / simultaneous biaxial stretching.
  • the liquid crystal composition preferably has a nematic phase as a liquid crystal phase (nematic liquid crystal).
  • the liquid crystal material may have a lyotropic or thermotropic mechanism.
  • the alignment state of the liquid crystal material is preferably homogeneous alignment.
  • a liquid crystal polymer or a liquid crystal monomer can be used as the liquid crystal material.
  • the liquid crystal polymer and the liquid crystal monomer may be used alone or in combination.
  • the liquid crystal composition When used as a ⁇ / 4 plate in the present invention, it is preferably a cured layer of a liquid crystal composition.
  • the liquid crystal monomer when the liquid crystal composition contains a liquid crystal monomer, the liquid crystal monomer preferably contains a polymerizable monomer and / or a crosslinkable monomer.
  • the alignment state of the liquid crystalline monomer can be fixed by polymerizing or crosslinking the liquid crystalline monomer. After aligning the liquid crystalline monomers, for example, if the liquid crystalline monomers are polymerized or crosslinked, the alignment state can be fixed thereby.
  • a polymer is formed by polymerization and a three-dimensional network structure is formed by crosslinking, but these are non-liquid crystalline.
  • the retardation layer for example, a transition to a liquid crystal phase, a glass phase, or a crystal phase due to a temperature change specific to the liquid crystal compound does not occur.
  • the retardation layer can be an extremely stable layer that is not affected by temperature changes.
  • liquid crystalline monomer examples include BASF trade name LC242, Merck trade name E7, and Wacker-Chem trade name LC-Silicon-CC3767. These liquid crystalline monomers can be used alone or in combination of two or more.
  • the temperature range in which the liquid crystalline monomer exhibits liquid crystallinity varies depending on the type. Specifically, the temperature range is preferably 40 to 120 ° C., more preferably 50 to 100 ° C., and most preferably 60 to 90 ° C.
  • the liquid crystal cured layer can be set so as to function most appropriately as a ⁇ / 4 plate.
  • the thickness can be set so as to obtain desired optical characteristics.
  • the thickness of the retardation layer is preferably 0.5 to 10 ⁇ m, more preferably 0.5 to 8 ⁇ m, and particularly preferably 0.5 to 5 ⁇ m.
  • any appropriate method can be adopted as a method for producing a film that exhibits optical anisotropy by application and orientation of the liquid crystal composition.
  • the surface of base films such as a polyethylene terephthalate film
  • a coating liquid containing the liquid crystal composition may be applied to the surface to form a liquid crystal cured layer.
  • the coating liquid may contain a polymerization initiator, a crosslinking agent, a surfactant, a solvent and the like.
  • Any appropriate alignment treatment can be adopted as the alignment treatment. Specifically, a mechanical alignment process, a physical alignment process, and a chemical alignment process are mentioned. Specific examples of the mechanical alignment treatment include rubbing treatment and stretching treatment.
  • the physical alignment process include a magnetic field alignment process and an electric field alignment process.
  • Specific examples of the chemical alignment treatment include oblique vapor deposition and photo-alignment treatment.
  • a rubbing process is preferred.
  • the alignment treatment may be performed directly on the surface of the base film, and any appropriate alignment film (typically, a silane coupling agent layer, a polyvinyl alcohol layer or a polyimide layer) is formed on the base film. You may give to alignment film.
  • the rubbing treatment is performed, it is preferably performed directly on the substrate film surface.
  • the orientation direction of the orientation treatment can be set according to the desired angle.
  • the liquid crystal material can be aligned according to the alignment direction of the base film, so that the slow axis of the formed liquid crystal cured layer is substantially the same as the alignment direction of the base film. Therefore, for example, when the polarizer 32 (first polarizer 32 ′) (long shape) has an absorption axis in the longitudinal direction, the angle is approximately 135 ° with respect to the longitudinal direction of the substrate (long shape).
  • An orientation process is performed in the direction of.
  • the polarizer 32 (first polarizer 32 ′) (polarizing plate) and the ⁇ / 4 plate 34 can be continuously laminated in a roll-to-roll manner. As a result, the manufacturing process can be significantly shortened.
  • ⁇ / 2 plate 54 As the ⁇ / 2 plate 54 used in the set of polarizing plates according to Embodiment 3 and Embodiment 4 of the present invention, a retardation film made of the same material as the ⁇ / 4 plate 34 can be used. For the ⁇ / 2 plate and the ⁇ / 4 plate, a retardation film made of the same material may be used, or a retardation film made of a different material may be used.
  • a polycarbonate resin film or a film that exhibits optical anisotropy by applying and orienting a liquid crystalline compound is used in the same manner as the ⁇ / 4 plate. It is preferable.
  • the retardation value of the ⁇ / 2 plate means that the retardation value Re is 200 nm to 300 nm at a measurement wavelength of 590 nm.
  • the Nz coefficient of the ⁇ / 2 plate is preferably in the range of 0.8 to 1.2. More preferably, it is in the range of 0.95 to 1.05.
  • the thickness of the retardation layer is preferably 0.5 to 20 ⁇ m, more preferably 0.5 to 16 ⁇ m. Particularly preferably, the thickness is 0.5 to 8 ⁇ m.
  • the second polarizer 52 ′ (long shape) has an absorption axis in its longitudinal direction
  • the substrate (long length)
  • the orientation treatment is performed in a direction whose angle is approximately 135 ° with respect to the longitudinal direction of the shape.
  • n x and n y are referred to a retardation film having an optical axis in the film normal direction at substantially equal positive uniaxial.
  • a phase difference film having the relationship of n x ⁇ n y ⁇ n z .
  • the in-plane retardation Re of the positive C plates 35 and 55 is preferably 20 nm or less, and more preferably 10 nm or less.
  • the thickness direction retardation value Rth is preferably ⁇ 50 nm to ⁇ 150 nm. More preferably, it is -70 nm to -120 nm.
  • the material and form thereof are not particularly limited.
  • a retardation film made of a birefringent polymer film and a retardation film having a retardation layer formed by applying or transferring a low-molecular or high-molecular liquid crystalline compound on a transparent support are used. be able to.
  • each can also be laminated
  • the retardation film made of a birefringent polymer film having the above optical properties is obtained by laminating a heat-shrinkable film and applying a predetermined tension while heating, and stretching a polymer film in the thickness direction of the film, or vinyl carbazole. It can be easily formed by a method in which a polymer is applied and dried.
  • a retardation layer formed from a liquid crystalline compound having the above optical characteristics a cholesteric discotic liquid crystal compound or composition containing a chiral structural unit is fixed after its helical axis is aligned substantially perpendicular to the substrate.
  • Examples thereof include a layer formed by forming a rod-like liquid crystal compound or composition having a positive refractive index anisotropy and a layer formed by orienting the substrate substantially vertically to a substrate and then immobilizing it.
  • the rod-like liquid crystal compound may be a low molecular compound or a high molecular compound.
  • not only one retardation layer but also a plurality of retardation layers can be laminated to form a retardation layer exhibiting the above optical characteristics.
  • the retardation layer may be configured so that the entire laminated body of the support and the retardation layer satisfies the optical characteristics.
  • rod-like liquid crystal compound to be used those that take a nematic liquid crystal phase, a smectic liquid crystal phase, and a lyotropic liquid crystal phase in a temperature range in which the orientation is fixed are preferably used.
  • a liquid crystal exhibiting a smectic A phase and a B phase that can obtain uniform vertical alignment without fluctuation is preferable.
  • These phases are preferable in that the birefringence is larger than that of the nematic liquid crystal phase and the thickness of the film can be reduced.
  • a rod-like liquid crystalline compound that becomes a liquid crystal state in an appropriate orientation temperature range is formed by using a composition containing the additive and the rod-like liquid crystalline compound. Is also preferable.
  • rod-like liquid crystalline compounds examples include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano-substituted phenylpyrimidines, alkoxy-substituted phenylpyrimidines. , Phenyldioxanes, tolanes and alkenylcyclohexylbenzonitriles are preferably used.
  • high-molecular liquid crystalline molecules can also be used.
  • the liquid crystal molecules those having a partial structure capable of causing polymerization or crosslinking reaction by actinic rays, electron beams, heat, or the like are preferably used.
  • the number of the partial structures is 1 to 6, preferably 1 to 3.
  • the retardation layer formed by fixing the rod-like liquid crystalline compound in the alignment state it is preferable to use the retardation layer formed by substantially vertically aligning the rod-like liquid crystalline compound and fixing in the state.
  • substantially perpendicular means that the angle formed between the film surface and the director of the rod-like liquid crystal compound is within a range of 70 ° to 90 °.
  • These liquid crystalline compounds may be obliquely aligned or may be inclined so that the inclination angle gradually changes (hybrid alignment). Even in the case of oblique orientation or hybrid orientation, the average inclination angle is preferably 70 ° to 90 °, more preferably 80 ° to 90 °, and most preferably 85 ° to 90 °.
  • the retardation layer formed from the rod-like liquid crystalline compound is formed on the support with a coating liquid containing the rod-like liquid crystalline compound and, if desired, the following polymerizable initiator, air interface vertical alignment agent and other additives. It can be formed by coating on the vertical alignment film formed, vertically aligning, and fixing the alignment state. When it is formed on a temporary support, it can also be produced by transferring the retardation layer onto the support. Furthermore, not only a single retardation layer but also a plurality of retardation layers can be laminated to form a retardation layer exhibiting the above optical characteristics. In addition, the retardation layer may be configured so that the entire laminated body of the support and the retardation layer satisfies the optical characteristics.
  • a positive C plate layer formed of a liquid crystal compound may be formed on the ⁇ / 4 plate 34 or the ⁇ / 2 plate 54 in an overlapping manner.
  • the two positive C plates 35 and 55 used in the present invention preferably have substantially equal retardation values in the thickness direction.
  • substantially equal means that the difference in retardation value in the thickness direction is 20 nm or less.
  • the brightness enhancement film 61 is also referred to as a reflective polarizer, and a polarization conversion element having a function of separating outgoing light from a light source (backlight) into transmitted polarized light and reflected polarized light or scattered polarized light is used.
  • a polarization conversion element having a function of separating outgoing light from a light source (backlight) into transmitted polarized light and reflected polarized light or scattered polarized light is used.
  • the return efficiency of the linearly polarized light emitted from the polarizing plate 50 is improved by using retroreflected light that is reflected polarized light or scattered polarized light. Can do.
  • the brightness enhancement film 61 can be, for example, an anisotropic reflective polarizer.
  • An example of an anisotropic reflective polarizer is an anisotropic multiple thin film that transmits linearly polarized light in one vibration direction and reflects linearly polarized light in the other vibration direction, and a specific example thereof is DBEF made of 3M ( JP-A-4-268505).
  • Another example of the anisotropic reflective polarizer is a composite of a cholesteric liquid crystal layer and a ⁇ / 4 plate, and a specific example thereof is a PCF manufactured by Nitto Denko (Japanese Patent Laid-Open No. 11-231130).
  • an anisotropic reflective polarizer is a reflective grid polarizer, a specific example of which is a metal grid reflective polarizer (US) that emits reflected polarized light even in the visible light region by finely processing the metal.
  • a metal grid reflective polarizer US
  • Patent No. 6288840 and the like discloses a film obtained by adding metal fine particles into a polymer matrix and stretching.
  • An optical layer such as a hard coat layer, an antiglare layer, a light diffusion layer, or a retardation layer having a retardation value of 1 ⁇ 4 wavelength may be provided on the surface of the brightness enhancement film 61 opposite to the polarizing plate 50. Good. By forming the optical layer, the adhesion to the backlight tape and the uniformity of the display image can be improved.
  • the thickness of the brightness enhancement film 61 can be about 10 to 100 ⁇ m, but is preferably 10 to 50 ⁇ m, more preferably 10 to 30 ⁇ m from the viewpoint of thinning the polarizing plate.
  • any appropriate pressure-sensitive adhesive layer or adhesive layer is preferably provided between the members constituting the polarizing plate of the present invention.
  • an adhesive layer is preferably provided on the surface of the polarizing plate in order to bond the polarizing plate to the liquid crystal cell.
  • an adhesive layer can be provided outside the ⁇ / 4 plate 34 and an adhesive layer can be provided outside the protective film 51b.
  • an adhesive layer can be provided outside the ⁇ / 4 plate 34 and an adhesive layer can be provided outside the ⁇ / 2 plate 54.
  • Examples of the adhesive that forms the adhesive layer include water-based adhesives and active energy ray-curable adhesives that are cured by irradiation with ultraviolet rays or electron beams.
  • Examples of the active energy ray-curable adhesive include a composition containing a radical polymerizable compound such as an acrylic compound and a composition containing a cationic polymerizable compound such as an epoxy compound. Each of these compositions preferably contains a radical polymerization initiator or a cationic polymerization initiator.
  • the adhesive (acrylic adhesive) containing acrylic resin is preferable.
  • the liquid crystal cell includes a pair of substrates and a liquid crystal layer as a display medium sandwiched between the substrates.
  • One substrate color filter substrate
  • the other substrate active matrix substrate
  • a switching element typically a TFT
  • the color filter may be provided on the active matrix substrate side.
  • the distance between the substrates (cell gap) is controlled by a spacer.
  • An alignment film made of, for example, polyimide is provided on the side of the substrate in contact with the liquid crystal layer.
  • the driving mode of the liquid crystal cell for disposing the set of polarizing plates of Embodiments 1 and 3 of the present invention is IPS (In-Plane Switching) having an in-plane retardation value of 100 to 200 nm at a wavelength of 590 nm. ) Mode is adopted. Since the liquid crystal cell itself has an in-plane retardation value close to ⁇ / 4 wavelength, it becomes possible to arrange a circularly polarizing plate as a viewing side polarizing plate, and greatly reduce reflection of external light. become able to.
  • IPS In-Plane Switching
  • the in-plane retardation of the liquid crystal cell As a method of setting the in-plane retardation of the liquid crystal cell to 100 nm to 200 nm at a wavelength of 590 nm, it can be produced by adjusting the thickness of the liquid crystal of the liquid crystal cell.
  • a liquid crystal cell having a desired in-plane retardation value can be produced by adjusting the thickness of the liquid crystal of the liquid crystal cell to about 1 to 2 ⁇ m.
  • the driving mode of the liquid crystal cell for disposing the set of polarizing plates of Embodiments 2 and 4 of the present invention is IPS (In-Plane Switching) having an in-plane retardation value of 400 to 500 nm at a wavelength of 590 nm. ) Mode is adopted. Since the liquid crystal cell itself has an in-plane retardation value close to 3 ⁇ / 4 wavelength, it becomes possible to arrange a circularly polarizing plate as a viewing side polarizing plate, and greatly reduce reflection of external light. become able to.
  • the in-plane retardation of the liquid crystal cell As a method for setting the in-plane retardation of the liquid crystal cell to 400 nm to 500 nm at a wavelength of 590 nm, it can be produced by adjusting the thickness of the liquid crystal of the liquid crystal cell.
  • a liquid crystal cell having a desired in-plane retardation value can be produced by adjusting the thickness of the liquid crystal of the liquid crystal cell to about 1 to 6 ⁇ m.
  • the liquid crystal display device of the present invention includes the set of polarizing plates of the present invention and the liquid crystal cell.
  • the liquid crystal display device of the present invention is particularly suitable for small and medium-sized liquid crystal display devices because it is excellent in visibility even in the strong outdoor light. For example, it is suitable when the size of the liquid crystal display device is 15 inches diagonal.
  • the initial alignment direction of the liquid crystal cell used in the present invention is defined as 0 °
  • the counterclockwise angle is defined as positive when the back side polarizing plate is viewed from the viewing side polarizing plate.
  • the slow axis of the ⁇ / 4 plate 34 is arranged at approximately ⁇ 90 ° with respect to the initial alignment direction.
  • the absorption axis of the viewing side polarizing plate is arranged at about ⁇ 45 ° with respect to the initial alignment direction
  • the absorption axis of the back side polarizing plate is arranged at about 45 ° with respect to the initial alignment direction.
  • it represents that the value is within the range of ⁇ 5 °, and preferably represents within the range of ⁇ 2 °.
  • the slow axis of the ⁇ / 4 plate 34 is arranged at approximately 0 ° with respect to the initial alignment direction of the liquid crystal cell. Further, the absorption axis of the viewing side polarizing plate is arranged at about 45 ° with respect to the initial alignment direction, and the absorption axis of the back side polarizing plate is arranged at about 135 ° with respect to the initial alignment direction.
  • the value is within the range of ⁇ 5 °, and preferably represents within the range of ⁇ 2 °.
  • the slow axis of the ⁇ / 4 plate 34 is arranged at about ⁇ 90 ° with respect to the initial alignment direction of the liquid crystal cell, and the slow axis of the ⁇ / 2 plate 54 is arranged at about 0 ° with respect to the initial alignment direction.
  • the absorption axis of the viewing side polarizing plate is arranged at about ⁇ 45 ° with respect to the initial alignment direction
  • the absorption axis of the back side polarizing plate is arranged at about ⁇ 45 ° with respect to the initial alignment direction.
  • it represents that the value is within the range of ⁇ 5 °, and preferably represents within the range of ⁇ 2 °.
  • the slow axis of the ⁇ / 4 plate 34 is disposed at approximately 0 ° with respect to the initial alignment direction of the liquid crystal cell, and the slow axis of the ⁇ / 2 plate 54 is disposed at approximately 90 ° with respect to the initial alignment direction.
  • the absorption axis of the viewing side polarizing plate is arranged at about 45 ° with respect to the initial alignment direction
  • the absorption axis of the back side polarizing plate is arranged at about 45 ° with respect to the initial alignment direction.
  • it represents that the value is within the range of ⁇ 5 °, and preferably represents within the range of ⁇ 2 °.
  • the initial alignment direction of the liquid crystal cell means the alignment direction of liquid crystal molecules in an initial state where no driving voltage is applied to the liquid crystal cell, and the initial alignment angle is an angle formed with respect to the long side of the liquid crystal cell. Is preferably approximately 45 °.
  • Measurement of thickness Measurement was performed using a digital micrometer “MH-15M” manufactured by Nikon Corporation.
  • the temperature in the sample room is raised from 23 ° C. to 80 ° C. over 1 minute, and the temperature in the sample room is maintained at 80 ° C.
  • the contraction force in the long side direction of the test piece was measured in an environment at 80 ° C. In this measurement, the static load was 0 mN, and a SUS probe was used as the jig.
  • Adhesives A and B The following two types of pressure-sensitive adhesives were prepared.
  • Adhesive A 25 ⁇ m thick sheet adhesive (“P-3132” manufactured by Lintec Corporation)
  • Adhesive B 5 ⁇ m thick sheet adhesive (“NCF # L2” manufactured by Lintec Corporation)
  • Protective films A, B, C, D The following four types of protective films were prepared.
  • Protective film A Triacetyl cellulose film with hard coat manufactured by Konica Minolta, Inc .; 25KCHCN-TC (thickness 32 ⁇ m)
  • Protective film B Triacetyl cellulose film manufactured by Konica Minolta, Inc .; KC2UA (thickness 25 ⁇ m)
  • Protective film D Anti-reflection film made of a triacetyl cellulose-based resin manufactured by Toppan TOMOEGAWA Optical Products Co., Ltd .; 40KSPLR (thickness 44 ⁇ m, Y value 1.1% according to JIS-Z87
  • Brightness enhancement film A 26 ⁇ m thick brightness enhancement film (trade name “Advanced Polarized Film, Version 3 made by 3M”)
  • the liquid crystal layer thus formed was irradiated with 20 mJ / cm 2 of light using a metal halide lamp to cure the liquid crystal layer, thereby forming a retardation layer on the substrate.
  • the thickness of the obtained retardation layer was 1 ⁇ m, and the in-plane retardation value was 139.8 nm at a wavelength of 590 nm.
  • the liquid crystal layer thus formed was irradiated with 20 mJ / cm 2 of light using a metal halide lamp to cure the liquid crystal layer, thereby forming a retardation layer on the substrate.
  • the thickness of the obtained retardation layer was 2 ⁇ m, and the in-plane retardation value was 258.6 nm at a wavelength of 590 nm.
  • a commercially available vertical alignment film (JALS-204R, manufactured by Nippon Synthetic Rubber Co., Ltd.) was diluted 1: 1 with methyl ethyl ketone on the surface of a base film (triacetylcellulose film, thickness 80 ⁇ m) and then applied with a wire bar coater ( Application amount 2.4 ml / m 2 ). Immediately, the film was dried with warm air of 120 ° C. for 120 seconds.
  • the rod-shaped liquid crystal compound was crosslinked by UV irradiation for 20 seconds with a 120 W / cm 2 high-pressure mercury lamp at 80 ° C., and then allowed to cool to room temperature to produce a retardation layer having the characteristics of a positive C plate.
  • the thickness of the obtained retardation layer was 0.6 ⁇ m, and the retardation value in the thickness direction was ⁇ 109.4 nm at a wavelength of 590 nm.
  • Air interface side vertical alignment agent Exemplary compounds (II-4) described in Japanese Patent Application No. 2003-119959
  • the protective film A was subjected to saponification treatment, and the bonding surface of the protective film C to the polarizer was subjected to corona treatment.
  • the protective film A, the polarizer and the protective film C are bonded with a water-based adhesive so that the triacetyl cellulose surface of the protective film A and the corona-treated surface of the protective film C become a bonding surface with the polarizer. A was obtained.
  • the protective film B was subjected to saponification treatment, and the bonding surface of the protective film C with the polarizer was subjected to corona treatment.
  • the protective film B, the polarizer, and the protective film C were bonded with a water-based adhesive so that the corona-treated surface of the protective film B and the protective film C became a bonding surface with the polarizer to obtain a polarizing plate.
  • An adhesive B was bonded to the protective film B side of the polarizing plate B. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film B and the adhesive B.
  • the brightness enhancement film A was bonded to the adhesive B surface of the polarizing plate to obtain a polarizing plate B.
  • the ⁇ / 4 plate 1 surface of the glass to which the ⁇ / 4 plate 1 was bonded and another glass adhesive B surface of the glass were bonded to produce a pseudo liquid crystal cell A.
  • corona treatment was performed on one surface of the ⁇ / 4 plate and the bonding surface of the adhesive B.
  • the slow axis direction of the ⁇ / 4 plate 1 was manufactured to be ⁇ 45 ° when the long side direction of the glass was 0 °.
  • the initial alignment direction of the pseudo liquid crystal cell A is 45 ° in the long side direction of the glass, and the pseudo liquid crystal cell A is subjected to a driving voltage.
  • a liquid crystal cell in the case of white display
  • the ⁇ / 4 plate 1 and the adhesive B surface were subjected to corona treatment.
  • the ⁇ / 4 plate 1 was further bonded to the adhesive B surface.
  • the ⁇ / 4 plate 1 and the adhesive B surface were subjected to corona treatment.
  • one glass ⁇ / 4 plate 1 surface and another glass adhesive B surface were bonded to prepare a pseudo liquid crystal cell B.
  • corona treatment was performed on one surface of the ⁇ / 4 plate and the bonding surface of the adhesive B.
  • the slow axis directions of all the ⁇ / 4 plates 1 were made to be 45 ° when the long side direction of the glass was 0 °.
  • Embodiment 2 or Embodiment 4 of the present invention it is assumed that the initial alignment direction of the pseudo liquid crystal cell B is ⁇ 45 ° in the long side direction of the glass, and the pseudo liquid crystal cell B is applied with a driving voltage.
  • the liquid crystal cell in the case (in the case of white display) is assumed.
  • Example 1-1 (Preparation of viewing side polarizing plate 1-1) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Next, the ⁇ / 4 plate 1 was laminated on the pressure-sensitive adhesive B surface of the produced polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of adhesive B and (lambda) / 4 board 1.
  • the angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is 45 ° (when the protective film C is viewed from the protective film A, ⁇ / so that the angle is 45 ° counterclockwise with respect to the absorption axis of the polarizing plate.
  • the slow axis of 4 plates 1 was arranged.
  • the adhesive B was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A.
  • the corona treatment was performed on one surface of the ⁇ / 4 plate of the polarizing plate A and the bonding surface of the adhesive B.
  • the positive C plate 1 was bonded to the adhesive B surface of the polarizing plate A.
  • the corona treatment was performed on the adhesive B surface and the bonding surface of the positive C plate 1.
  • the adhesive A was bonded to the surface of the positive C plate 1 of the polarizing plate A.
  • the corona treatment was performed on one surface of the positive C plate and the bonding surface of the adhesive A. In this way, a viewing side polarizing plate 1-1 was produced.
  • Adhesive A was bonded to the protective film C surface of the polarizing plate B to prepare a back side polarizing plate 1-1. Under the present circumstances, the corona treatment was performed to the protective film C surface and the bonding surface of the adhesive A.
  • FIG. 1 Preparation of back side polarized light 1-1
  • Adhesive A was bonded to the protective film C surface of the polarizing plate B to prepare a back side polarizing plate 1-1.
  • the corona treatment was performed to the protective film C surface and the bonding surface of the adhesive A.
  • the manufactured viewing-side polarizing plate 1-1 and back-side polarizing plate 1-1 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, when the protective film A of the viewing-side polarizing plate 1-1 is viewed as the upper surface, the viewing-side polarizing plate is cut so that the absorption axis is parallel to the short side direction. When the ⁇ 1 protective film B surface was viewed as the top surface, the back side polarizing plate 1-1 was cut so that the absorption axis was parallel to the long side direction.
  • the viewing side polarizing plate 1-1 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell A was drawn, and the back side polarizing plate 1-1 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 1-2 A pseudo liquid crystal panel was produced in the same manner as in Example 1-1 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 1-3 A pseudo liquid crystal panel was produced in the same manner as in Example 1-1 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 1-4 A pseudo liquid crystal panel was produced in the same manner as in Example 1-1 except that the protective film A of the viewing side polarizing plate 1-1 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 1-5 A pseudo liquid crystal panel was produced in the same manner as in Example 1-4 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 1-6 A pseudo liquid crystal panel was produced in the same manner as in Example 1-4 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 1-7 (Preparation of viewing side polarizing plate 1-2) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Subsequently, the positive C plate 1 was bonded to the adhesive B surface of the produced polarizing plate A. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the positive C plate 1. Furthermore, the adhesive B was bonded to the surface of the positive C plate of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the positive C plate of the polarizing plate A and the bonding surface of the adhesive B.
  • the ⁇ / 4 plate 1 was bonded to the adhesive B surface of the polarizing plate A.
  • the corona treatment was performed to the bonding surface of adhesive B and (lambda) / 4 board 1.
  • FIG. The angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is 45 ° (when the protective film C is viewed from the protective film A, ⁇ / so that the angle is 45 ° counterclockwise with respect to the absorption axis of the polarizing plate.
  • the slow axis of 4 plates 1 was arranged.
  • the adhesive A was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A.
  • the corona treatment was performed on one surface of the ⁇ / 4 plate and the adhesive surface of the adhesive A. In this way, a viewing side polarizing plate 1-2 was produced.
  • the manufactured viewing-side polarizing plate 1-2 and back-side polarizing plate 1-1 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, when the protective film A of the viewing side polarizing plate 1-2 is viewed as the upper surface, the back side polarizing plate 1 is cut so that the absorption axis of the viewing side polarizing plate is parallel to the short side direction. When the ⁇ 1 protective film B surface was viewed as the top surface, the back side polarizing plate 1-1 was cut so that the absorption axis was parallel to the long side direction.
  • a viewing-side polarizing plate 1-2 was bonded to the glass surface on which a picture of the pseudo liquid crystal cell A was drawn, and a back-side polarizing plate 1-1 was bonded to the opposite glass surface to prepare a pseudo-liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 1-8 A pseudo liquid crystal panel was produced in the same manner as in Example 1-7, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 1-9 A pseudo liquid crystal panel was produced in the same manner as in Example 1-7, except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 1-10 A pseudo liquid crystal panel was produced in the same manner as in Example 1-7 except that the protective film A of the viewing side polarizing plate 1-2 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 1-11 A pseudo liquid crystal panel was produced in the same manner as in Example 1-10 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 1-12 A pseudo liquid crystal panel was produced in the same manner as in Example 1-10 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Examples 1-13 to 1-24 Pseudo liquid crystal panels were similarly produced except that the ⁇ / 4 plate 1 of Examples 1-1 to 1-12 was changed to the ⁇ / 4 plate 2.
  • Table 1 below shows the correspondence between the numbers of the respective examples.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux in all the pseudo liquid crystal panels.
  • Example 2-1 (Preparation of viewing side polarizing plate 2-1) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Next, the ⁇ / 4 plate 1 was laminated on the pressure-sensitive adhesive B surface of the produced polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of adhesive B and (lambda) / 4 board 1.
  • the angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is ⁇ 45 ° (when the protective film C is viewed from the protective film A, ⁇ / The slow axis of 4 plates 1 was arranged.) Furthermore, the adhesive B was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the ⁇ / 4 plate of the polarizing plate A and the bonding surface of the adhesive B. Next, the positive C plate 1 was bonded to the adhesive B surface of the polarizing plate A. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the positive C plate 1.
  • the adhesive A was bonded to the surface of the positive C plate 1 of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the positive C plate and the bonding surface of the adhesive A. In this way, a viewing side polarizing plate 2-1 was produced.
  • Adhesive A was bonded to the protective film C surface of the polarizing plate B to prepare a back side polarizing plate 2-1. Under the present circumstances, the corona treatment was performed to the protective film C surface and the bonding surface of the adhesive A.
  • FIG. 1 Preparation of back side polarizing plate 2-1
  • the manufactured viewing-side polarizing plate 2-1 and back-side polarizing plate 2-1 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, when the protective film A of the viewing-side polarizing plate 2-1 is viewed as the upper surface, the viewing-side polarizing plate is cut so that the absorption axis is parallel to the short side direction. When the -1 protective film B surface was viewed as the top surface, the back side polarizing plate 2-1 was cut so that the absorption axis was parallel to the long side direction.
  • a viewing-side polarizing plate 2-1 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell B was drawn, and a back-side polarizing plate 2-1 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 2-2 A pseudo liquid crystal panel was produced in the same manner as in Example 2-1, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 2-3 A pseudo liquid crystal panel was produced in the same manner as in Example 2-1, except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 2-4 A pseudo liquid crystal panel was produced in the same manner as in Example 2-1, except that the protective film A of the viewing side polarizing plate 2-1 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 2-5 A pseudo liquid crystal panel was produced in the same manner as in Example 2-4 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 2-6 A pseudo liquid crystal panel was produced in the same manner as in Example 2-4 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 2-7 (Preparation of viewing side polarizing plate 2-2) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Next, the positive C plate 1 was laminated on the pressure-sensitive adhesive B surface of the produced polarizing plate A. At this time, corona treatment was performed on the bonding surfaces of the adhesive B and the positive C plate 1. Furthermore, the adhesive B was bonded to the surface of the positive C plate of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the positive C plate of the polarizing plate A and the bonding surface of the adhesive B.
  • the ⁇ / 4 plate 1 was bonded to the adhesive B surface of the polarizing plate A. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the ⁇ / 4 plate 1. The angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is ⁇ 45 ° (when the protective film C is viewed from the protective film A, ⁇ / The slow axis of 4 plates 1 was arranged.) Finally, the adhesive A was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A. Also in this case, the corona treatment was performed on one surface of the ⁇ / 4 plate and the adhesive surface of the adhesive A. In this way, a viewing side polarizing plate 2-2 was produced.
  • the manufactured viewing-side polarizing plate 2-2 and back-side polarizing plate 2-1 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, when the protective film A of the viewing-side polarizing plate 2-2 is viewed as the upper surface, the viewing-side polarizing plate is cut so that the absorption axis is parallel to the short side direction. When the -1 protective film B surface was viewed as the top surface, the back side polarizing plate 2-1 was cut so that the absorption axis was parallel to the long side direction.
  • the viewing side polarizing plate 2-2 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell B was drawn, and the back side polarizing plate 2-1 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 2-8 A pseudo liquid crystal panel was produced in the same manner as in Example 2-7, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 2-9 A pseudo liquid crystal panel was produced in the same manner as in Example 2-7, except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 2-10 A pseudo liquid crystal panel was produced in the same manner as in Example 2-7 except that the protective film A of the viewing side polarizing plate 2-2 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 2-11 A pseudo liquid crystal panel was produced in the same manner as in Example 2-10, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 2-12 A pseudo liquid crystal panel was produced in the same manner as in Example 2-10 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Examples 2-13 to 2-24 Pseudo liquid crystal panels were similarly produced except that the ⁇ / 4 plate 1 was changed to the ⁇ / 4 plate 2 in Examples 2-1 to 2-12.
  • Table 2 below shows the correspondence between the numbers of the respective examples.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux in all the pseudo liquid crystal panels.
  • Example 3-1 (Preparation of viewing side polarizing plate 3-1) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Next, the ⁇ / 4 plate 1 was laminated on the pressure-sensitive adhesive B surface of the produced polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of adhesive B and (lambda) / 4 board 1.
  • the angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is 45 ° (when the protective film C is viewed from the protective film A, ⁇ / so that the angle is 45 ° counterclockwise with respect to the absorption axis of the polarizing plate. 4 plates 1 were disposed). Furthermore, the adhesive B was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the ⁇ / 4 plate of the polarizing plate A and the bonding surface of the adhesive B. Next, the positive C plate 1 was bonded to the adhesive B surface of the polarizing plate A.
  • the corona treatment was performed on the adhesive B surface and the bonding surface of the positive C plate 1.
  • the adhesive A was bonded to the surface of the positive C plate 1 of the polarizing plate A.
  • the corona treatment was performed on one surface of the positive C plate and the bonding surface of the adhesive A. In this way, a viewing side polarizing plate 3-1 was produced.
  • a back side polarizing plate 3-1 was prepared in the same manner as the viewing side polarizing plate 3-1, except that the polarizing plate A was changed to the polarizing plate B and the ⁇ / 4 plate 1 was changed to the ⁇ / 2 plate 1.
  • the angle formed between the absorption axis of the polarizing plate and the ⁇ / 2 plate 1 is 45 ° (when the protective film B is viewed from the protective film C, ⁇ / The two plates 1 were disposed.).
  • the retardation value in the thickness direction at a wavelength of 590 nm was the same for the positive C plate of the viewing side polarizing plate and the positive C plate of the back side polarizing plate.
  • the manufactured viewing-side polarizing plate 3-1 and back-side polarizing plate 3-1 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • a viewing-side polarizing plate 3-1 was bonded to the glass surface on which a picture of the pseudo liquid crystal cell A was drawn, and a back-side polarizing plate 3-1 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-2 A pseudo liquid crystal panel was produced in the same manner as in Example 3-1, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-3 A pseudo liquid crystal panel was produced in the same manner as in Example 3-1, except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-4 A pseudo liquid crystal panel was produced in the same manner as in Example 3-1, except that the protective film A of the viewing side polarizing plate 3-1 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-5 A pseudo liquid crystal panel was produced in the same manner as in Example 3-4 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-6 A pseudo liquid crystal panel was produced in the same manner as in Example 3-4 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Adhesive B was bonded to the protective film C surface of polarizing plate B. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Subsequently, the positive C plate 1 was bonded to the adhesive B surface of the produced polarizing plate B. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the positive C plate 1. Furthermore, the adhesive B was bonded to the surface of the positive C plate of the polarizing plate B. Also at this time, the corona treatment was performed on the positive C plate 1 surface of the polarizing plate B and the adhesive surface of the adhesive B.
  • the ⁇ / 2 plate 1 was bonded to the adhesive B surface of the polarizing plate B. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the ⁇ / 2 plate 1. The angle formed between the absorption axis of the polarizing plate and the ⁇ / 2 plate 1 is 45 ° (when the protective film B is viewed from the protective film C, ⁇ / The two plates 1 were disposed.). Finally, the pressure-sensitive adhesive A was bonded to one surface of the ⁇ / 2 plate of the polarizing plate B. Also at this time, a corona treatment was performed on one surface of the ⁇ / 2 plate and the bonding surface of the adhesive A.
  • a back side polarizing plate 3-2 was produced.
  • the retardation value in the thickness direction at a wavelength of 590 nm was the same for the positive C plate of the viewing side polarizing plate 3-1 and the positive C plate of the back side polarizing plate.
  • the manufactured viewing-side polarizing plate 3-1 and back-side polarizing plate 3-2 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • a viewing-side polarizing plate 3-1 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell A was drawn, and a back-side polarizing plate 3-2 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-8 A pseudo liquid crystal panel was produced in the same manner as in Example 3-7, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-9 A pseudo liquid crystal panel was produced in the same manner as in Example 3-7, except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-10 A pseudo liquid crystal panel was produced in the same manner as in Example 3-7, except that the protective film A of the viewing side polarizing plate 3-1 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-11 A pseudo liquid crystal panel was produced in the same manner as in Example 3-10 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-12 A pseudo liquid crystal panel was produced in the same manner as in Example 3-10 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-13 (Preparation of viewing side polarizing plate 3-2) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Subsequently, the positive C plate 1 was bonded to the adhesive B surface of the produced polarizing plate A. At this time, corona treatment was performed on the bonding surfaces of the adhesive B and the positive C plate 1. Furthermore, the adhesive B was bonded to the surface of the positive C plate of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the positive C plate of the polarizing plate A and the bonding surface of the adhesive B.
  • the ⁇ / 4 plate 1 was bonded to the adhesive B surface of the polarizing plate A. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the ⁇ / 4 plate 1.
  • the angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is 45 ° (when the protective film C is viewed from the protective film A, ⁇ / so that the angle is 45 ° counterclockwise with respect to the absorption axis of the polarizing plate. 4 plates 1 were disposed). Finally, the adhesive A was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A.
  • the corona treatment was performed on one surface of the ⁇ / 4 plate and the adhesive surface of the adhesive A.
  • the viewing side polarizing plate 2 was produced.
  • the retardation value in the thickness direction at a wavelength of 590 nm was the same for the positive C plate of the viewing side polarizing plate 3-2 and the positive C plate of the back side polarizing plate 3-1.
  • the manufactured viewing-side polarizing plate 3-2 and back-side polarizing plate 3-1 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • the viewing side polarizing plate 3-2 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell A was drawn, and the back side polarizing plate 3-1 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-14 A pseudo liquid crystal panel was produced in the same manner as in Example 3-13 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-15 A pseudo liquid crystal panel was produced in the same manner as in Example 3-13 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-16 A pseudo liquid crystal panel was produced in the same manner as in Example 3-13 except that the protective film A of the viewing side polarizing plate 3-2 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-17 A pseudo liquid crystal panel was produced in the same manner as in Example 3-16 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-18 A pseudo liquid crystal panel was produced in the same manner as in Example 3-16 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-19 The manufactured viewing side polarizing plate 3-2 and back side polarizing plate 3-2 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • the viewing side polarizing plate 3-2 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell A was drawn, and the back side polarizing plate 3-2 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-20 A pseudo liquid crystal panel was produced in the same manner as in Example 3-19 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-21 A pseudo liquid crystal panel was produced in the same manner as in Example 3-19 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 3-22 A pseudo liquid crystal panel was produced in the same manner as in Example 3-19 except that the protective film A of the viewing-side polarizing plate 2 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-23 A pseudo liquid crystal panel was produced in the same manner as in Example 3-22 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 3-24 A pseudo liquid crystal panel was produced in the same manner as in Example 3-22 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Examples 3-25 to 3-48 Pseudo liquid crystal panels were similarly produced except that the ⁇ / 4 plate 1 in Examples 3-1 to 3-24 was changed to the ⁇ / 4 plate 2 and the ⁇ / 2 plate 1 was changed to the ⁇ / 2 plate 2.
  • Table 3 shows the correspondence between the numbers of the respective examples.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux in all the pseudo liquid crystal panels.
  • Example 4-1 (Preparation of viewing side polarizing plate 4-1) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Next, the ⁇ / 4 plate 1 was laminated on the pressure-sensitive adhesive B surface of the produced polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of adhesive B and (lambda) / 4 board 1.
  • FIG. The angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is ⁇ 45 ° (when the protective film C is viewed from the protective film A, ⁇ / 4 plates 1 were disposed).
  • the adhesive B was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the ⁇ / 4 plate of the polarizing plate A and the bonding surface of the adhesive B. Next, the positive C plate 1 was bonded to the adhesive B surface of the polarizing plate A. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the positive C plate 1. Finally, the adhesive A was bonded to the surface of the positive C plate 1 of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the positive C plate and the bonding surface of the adhesive A. In this way, a viewing side polarizing plate 4-1 was produced.
  • a rear side polarizing plate 4-1 was produced in the same manner as the viewing side polarizing plate 4-1 except that the polarizing plate A was changed to the polarizing plate B and the ⁇ / 4 plate 1 was changed to the ⁇ / 2 plate 1. That is, the ⁇ / 2 plate 1 is bonded on the protective film C in the polarizing plate B via the adhesive B, then the positive C plate 1 is bonded via the adhesive B, and finally on the positive C plate. Adhesive A was laminated.
  • the angle formed between the absorption axis of the polarizing plate and the ⁇ / 2 plate 1 is 45 ° (when the protective film B is viewed from the protective film C, ⁇ / The two plates 1 were disposed.).
  • the retardation value in the thickness direction at a wavelength of 590 nm was the same for the positive C plate of the viewing side polarizing plate and the positive C plate of the back side polarizing plate.
  • the manufactured viewing side polarizing plate 4-1 and back side polarizing plate 4-1 were cut into a size of 155 mm length ⁇ 96 mm width. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • a viewing-side polarizing plate 4-1 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell B was drawn, and a back-side polarizing plate 4-1 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-2 A pseudo liquid crystal panel was produced in the same manner as in Example 4-1, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-3 A pseudo liquid crystal panel was produced in the same manner as in Example 4-1, except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-4 A pseudo liquid crystal panel was produced in the same manner as in Example 4-1, except that the protective film A of the viewing side polarizing plate 4-1 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-5 A pseudo liquid crystal panel was produced in the same manner as in Example 4-4 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-6 A pseudo liquid crystal panel was produced in the same manner as in Example 4-4 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-7 (Preparation of back side polarizing plate 4-2)
  • Adhesive B was bonded to the protective film C surface of polarizing plate B.
  • the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B.
  • the positive C plate 1 was laminated on the adhesive B surface of the produced polarizing plate B.
  • corona treatment was performed on the bonding surfaces of the adhesive B and the positive C plate 1.
  • the adhesive B was bonded to the surface of the positive C plate of the polarizing plate B.
  • the corona treatment was performed on the positive C plate 1 surface of the polarizing plate B and the adhesive surface of the adhesive B.
  • the ⁇ / 2 plate 1 was bonded to the adhesive B surface of the polarizing plate B. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the ⁇ / 2 plate 1. The angle formed between the absorption axis of the polarizing plate and the ⁇ / 2 plate 1 is 45 ° (when the protective film B is viewed from the protective film C, ⁇ / The two plates 1 were disposed.). Finally, the pressure-sensitive adhesive A was bonded to one surface of the ⁇ / 2 plate of the polarizing plate B. Also at this time, a corona treatment was performed on one surface of the ⁇ / 2 plate and the bonding surface of the adhesive A. In this way, a back side polarizing plate 4-2 was produced.
  • the manufactured viewing-side polarizing plate 4-1 and back-side polarizing plate 4-2 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • the viewing side polarizing plate 4-1 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell B was drawn, and the back side polarizing plate 4-2 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-8 A pseudo liquid crystal panel was produced in the same manner as in Example 4-7, except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-9 A pseudo liquid crystal panel was produced in the same manner as in Example 4-7, except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-10 A pseudo liquid crystal panel was produced in the same manner as in Example 4-7 except that the protective film A of the viewing side polarizing plate 4-1 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-11 A pseudo liquid crystal panel was produced in the same manner as in Example 4-10 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-12 A pseudo liquid crystal panel was produced in the same manner as in Example 4-10 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-13 (Preparation of viewing side polarizing plate 4-2) An adhesive B was bonded to the protective film C surface of the polarizing plate A. Under the present circumstances, the corona treatment was performed to the bonding surface of the protective film C surface and the adhesive B. Next, the positive C plate 1 was laminated on the pressure-sensitive adhesive B surface of the produced polarizing plate A. At this time, corona treatment was performed on the bonding surfaces of the adhesive B and the positive C plate 1. Furthermore, the adhesive B was bonded to the surface of the positive C plate of the polarizing plate A. Also at this time, the corona treatment was performed on one surface of the positive C plate of the polarizing plate A and the bonding surface of the adhesive B.
  • the ⁇ / 4 plate 1 was bonded to the adhesive B surface of the polarizing plate A. Also at this time, the corona treatment was performed on the adhesive B surface and the bonding surface of the ⁇ / 4 plate 1. The angle formed between the absorption axis of the polarizing plate and the ⁇ / 4 plate 1 is ⁇ 45 ° (when the protective film C is viewed from the protective film A, ⁇ / 4 plates 1 were disposed). Finally, the adhesive A was bonded to one surface of the ⁇ / 4 plate of the polarizing plate A. Also in this case, the corona treatment was performed on one surface of the ⁇ / 4 plate and the adhesive surface of the adhesive A. In this way, a viewing side polarizing plate 4-2 was produced.
  • the manufactured viewing-side polarizing plate 4-2 and back-side polarizing plate 4-1 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • the viewing side polarizing plate 4-2 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell B was drawn, and the back side polarizing plate 4-1 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-14 A pseudo liquid crystal panel was produced in the same manner as in Example 4-13 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-15 A pseudo liquid crystal panel was produced in the same manner as in Example 4-13 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-16 A pseudo liquid crystal panel was produced in the same manner as in Example 4-13 except that the protective film A of the viewing side polarizing plate 4-2 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-17 A pseudo liquid crystal panel was produced in the same manner as in Example 4-16 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-18 A pseudo liquid crystal panel was produced in the same manner as in Example 4-16 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-19 The manufactured viewing-side polarizing plate 4-2 and back-side polarizing plate 4-2 were cut into a size of 155 mm long ⁇ 96 mm wide. At this time, each polarizing plate was cut so that the absorption axis was 90 ° with respect to the long side direction.
  • the viewing-side polarizing plate 4-2 was bonded to the glass surface on which the picture of the pseudo liquid crystal cell B was drawn, and the back-side polarizing plate 4-2 was bonded to the opposite glass surface to prepare a pseudo liquid crystal panel.
  • the shaft configuration was as shown in FIG.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-20 A pseudo liquid crystal panel was produced in the same manner as in Example 4-19 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-21 A pseudo liquid crystal panel was produced in the same manner as in Example 4-19 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 7500 Lux.
  • Example 4-22 A pseudo liquid crystal panel was produced in the same manner as in Example 4-19 except that the protective film A of the viewing side polarizing plate 4-2 was changed to the protective film D.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-23 A pseudo liquid crystal panel was produced in the same manner as in Example 4-22 except that the positive C plate 1 was changed to the positive C plate 2.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Example 4-24 A pseudo liquid crystal panel was produced in the same manner as in Example 4-22 except that the positive C plate 1 was changed to the positive C plate 3.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux.
  • Examples 4-25 to 4-48 Pseudo liquid crystal panels were similarly produced except that the ⁇ / 4 plate 1 in Examples 4-1 to 4-24 was changed to the ⁇ / 4 plate 2 and the ⁇ / 2 plate 1 was changed to the ⁇ / 2 plate 2.
  • Table 4 below shows the correspondence between the numbers of the respective examples.
  • the pseudo liquid crystal panel thus produced was placed on the produced backlight, and it was confirmed that the picture was visible. When the visibility was confirmed under external light, the visibility was good even at 10,000 Lux in all the pseudo liquid crystal panels.
  • the set of polarizing plates of the present invention it is possible to provide a liquid crystal display device that can suppress reflection of external light and ensure good visibility even in an environment with strong external light such as outdoors. So it is useful.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

La présente invention a trait à un ensemble de plaques de polarisation qui est constitué d'une plaque de polarisation côté visualisation (30, 34) et d'une plaque de polarisation côté surface arrière (50), et qui est fixé aux deux côtés d'une cellule à cristaux liquides en mode IPS (60) ayant un déphasage dans le plan de 100 à 200 nm. L'axe d'absorption (1) de la plaque de polarisation côté visualisation (30, 34) et l'axe d'absorption (5) de la plaque de polarisation côté surface arrière sont sensiblement orthogonaux. Ladite plaque de polarisation côté visualisation (30, 34) a un polariseur (30) et une plaque λ/4 (34). L'angle formé par l'axe d'absorption (1) de cette plaque de polarisation côté visualisation (30, 34) et l'axe lent (2) de la plaque λ/4 (34) est d'environ 45°. L'axe lent (2) de ladite plaque λ/4 (34) est disposé de manière à avoir une relation sensiblement orthogonale avec la direction d'orientation initiale (3) de la cellule à cristaux liquides en mode IPS (60). La présente invention concerne également un dispositif d'affichage à cristaux liquides en mode IPS qui utilise cet ensemble. Il est possible d'obtenir un ensemble de plaques de polarisation pour une cellule à cristaux liquides en mode IPS précise et un dispositif d'affichage à cristaux liquides en mode IPS utilisant cet ensemble, qui peuvent assurer une excellente visibilité même dans un environnement avec une lumière extérieure forte.
PCT/JP2017/011362 2016-03-31 2017-03-22 Ensemble de plaques de polarisation, et afficheur à cristaux liquides en mode ips utilisant cet ensemble WO2017170019A1 (fr)

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CN201780021170.XA CN108885369B (zh) 2016-03-31 2017-03-22 偏振板组和使用了该偏振板组的ips模式液晶显示装置

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JP2016217007A JP2018060149A (ja) 2016-03-31 2016-11-07 偏光板のセット及びそれを用いたｉｐｓモード液晶表示装置
JP2016217006A JP6699513B2 (ja) 2016-03-31 2016-11-07 偏光板のセット及びそれを用いたｉｐｓモード液晶表示装置
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JP2016217009A JP6699514B2 (ja) 2016-05-27 2016-11-07 Ｉｐｓモード用の偏光板のセット及びそれを用いたｉｐｓモード液晶表示装置
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JP2009227667A (ja) * 2008-02-27 2009-10-08 Sumitomo Chemical Co Ltd 化合物および該化合物を含む光学フィルム
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JP7390101B2 (ja) 2018-05-10 2023-12-01 住友化学株式会社 光学積層体および表示装置

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