WO2017094539A1 - Corps stratifié optique long et dispositif d'affichage d'image - Google Patents

Corps stratifié optique long et dispositif d'affichage d'image Download PDF

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Publication number
WO2017094539A1
WO2017094539A1 PCT/JP2016/084385 JP2016084385W WO2017094539A1 WO 2017094539 A1 WO2017094539 A1 WO 2017094539A1 JP 2016084385 W JP2016084385 W JP 2016084385W WO 2017094539 A1 WO2017094539 A1 WO 2017094539A1
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Prior art keywords
layer
retardation
retardation layer
polarizer
film
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PCT/JP2016/084385
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English (en)
Japanese (ja)
Inventor
丈治 喜多川
明憲 西村
彩香 梅本
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日東電工株式会社
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to CN201680070747.1A priority Critical patent/CN108292004B/zh
Priority to KR1020187015396A priority patent/KR102014924B1/ko
Publication of WO2017094539A1 publication Critical patent/WO2017094539A1/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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

  • the present invention relates to a long optical laminate and an image display device using the same.
  • the polarizing plate (or circularly polarizing plate) for the inner touch panel type input display device the polarizing plate (or circularly polarizing plate) and the conductivity for the touch sensor are used from the viewpoints of thinning, prevention of variation in quality, and improvement of manufacturing efficiency. Integration with film is under consideration. For example, an attempt has been made to bond a long polarizing plate (or a circular polarizing plate) and a long conductive film by so-called roll-to-roll. However, the polarizing plate in which the conductive film is integrated by roll-to-roll has a problem that the variation in characteristics in the width direction is large. As a result, when a polarizing plate in which such a conductive film is integrated is cut into a predetermined size and applied to an image display device, there may be an unacceptable variation in display characteristics for each product.
  • the present invention has been made to solve the above-described conventional problems, and a main object of the present invention is to reduce variations in display characteristics of each product when applied to an image display device by cutting into a predetermined size.
  • the object is to provide a long optical laminate.
  • the optical layered body of the present invention is long, and includes a polarizer, a polarizing plate including a protective layer on at least one side of the polarizer, a first retardation layer, and a second retardation layer.
  • the conductive layer and the base material adhered and laminated on the conductive layer in this order.
  • the in-plane retardation Re (550) of the substrate is 3 nm to 6 nm, the variation in the retardation in the width direction of the substrate is 10% to 30%, and the slow axis direction in the width direction of the substrate The variation is 1 ° to 5 °.
  • the in-plane retardation Re (550) of the first retardation layer is 220 nm to 250 nm, and the slow axis of the first retardation layer and the absorption axis of the polarizer
  • the in-plane retardation Re (550) of the second retardation layer is 110 nm to 125 nm, and the slow axis of the second retardation layer and the polarization
  • the angle formed with the absorption axis of the child is 65 ° to 85 °.
  • the optical layered body has a roll shape.
  • the optical layered body has a width of 500 mm or more.
  • the 1st phase contrast layer and the 2nd phase contrast layer are constituted by cyclic olefin system resin film.
  • the first retardation layer and the second retardation layer are alignment solidified layers of a liquid crystal compound.
  • an image display device is provided. This image display device includes the above-described optical laminated body cut into a predetermined size.
  • the present invention in a long optical laminate having a polarizing plate, a retardation layer, and a touch sensor conductive layer, by optically compensating by combining two specific retardation layers as a retardation layer,
  • the optical laminate is cut into a predetermined size regardless of variations in the width direction of the optical laminate due to the retardation of the substrate on which the conductive layer is formed and the width of the retardation.
  • FIG. 1 It is a schematic sectional drawing of the optical laminated body by one Embodiment of this invention. It is a schematic plan view explaining the whole structure of the diagonal stretch apparatus used in Reference Example 4. It is a principal part schematic plan view for demonstrating the link mechanism which changes a clip pitch in the diagonal stretch apparatus of FIG. 2, and shows the state where a clip pitch is the minimum. It is a principal part schematic plan view for demonstrating the link mechanism which changes a clip pitch in the diagonal stretch apparatus of FIG. 2, and shows the state where a clip pitch is the maximum. It is a schematic diagram explaining embodiment of diagonal stretch employ
  • Refractive index (nx, ny, nz) “Nx” is the refractive index in the direction in which the in-plane refractive index is maximum (ie, the slow axis direction), and “ny” is the direction orthogonal to the slow axis in the plane (ie, the fast axis direction). “Nz” is the refractive index in the thickness direction.
  • Refractive index (nx, ny, nz) “Nx” is the refractive index in the direction in which the in-plane refractive index is maximum (ie, the slow axis direction), and “ny” is the direction orthogonal to the slow axis in the plane (ie, the fast axis direction). “Nz” is the refractive index in the thickness direction.
  • In-plane retardation (Re) “Re ( ⁇ )” is an in-plane retardation measured with light having a wavelength of ⁇ nm at 23 ° C.
  • Re (550) is an in-plane retardation measured with light having a wavelength of 550 nm at 23 ° C.
  • Thickness direction retardation (Rth) is a retardation in the thickness direction measured with light having a wavelength of ⁇ nm at 23 ° C.
  • Rth (550) is a retardation in the thickness direction measured with light having a wavelength of 550 nm at 23 ° C.
  • FIG. 1 is a schematic cross-sectional view of an optical laminate according to one embodiment of the present invention.
  • the optical laminated body 100 of this embodiment has the polarizing plate 10, the 1st phase difference layer 20, the 2nd phase difference layer 30, the conductive layer 41, and the base material 42 in this order.
  • the polarizing plate 10 includes a polarizer 11, a first protective layer 12 disposed on one side of the polarizer 11, and a second protective layer 13 disposed on the other side of the polarizer 11. .
  • one of the first protective layer 12 and the second protective layer 13 may be omitted.
  • the first retardation layer 20 can also function as a protective layer for the polarizer 11
  • the second protective layer 13 may be omitted.
  • the base material 42 is closely adhered to the conductive layer 41.
  • adhered to the conductive layer 41 “adhesion lamination” means that two layers are directly and firmly laminated without an adhesive layer (for example, an adhesive layer or an adhesive layer).
  • the conductive layer 41 and the base material 42 can be typically introduced into the optical laminate 100 as a laminate of the base material 42 and the conductive layer 41.
  • the ratio of the thickness of each layer in drawing differs from actual.
  • the optical layered body of the embodiment of the present invention has a long shape. Therefore, the constituent elements (for example, a polarizing plate, a retardation layer, and a base material) of the optical laminate are also long.
  • the optical layered body is wound in a roll shape.
  • “long shape” means an elongated shape having a sufficiently long length with respect to the width. For example, an elongated shape having a length that is 10 times or more, preferably 20 times or more the width.
  • the optical layered body 100 includes, for example, the long retardation film 10 that forms the long polarizing plate 10 and the first retardation layer 20 and the long retardation film 30 that forms the second retardation layer 30.
  • roll to roll means aligning and sticking together each other's elongate direction, conveying a roll-shaped film.
  • the optical laminate 100 has two retardation layers (the first retardation layer 20 and the second retardation layer 30).
  • the first retardation layer 20 has a slow axis.
  • the angle formed by the slow axis of the first retardation layer 20 and the absorption axis of the polarizer 11 is 10 ° to 20 °, preferably 13 ° to 17 °, and more preferably about 15 °.
  • the first retardation layer preferably has a relationship of refractive index characteristics of nx> ny ⁇ nz.
  • the in-plane retardation Re (550) of the first retardation layer is 220 nm to 250 nm, preferably 230 nm to 240 nm.
  • the second retardation layer 30 also has a slow axis.
  • the angle formed by the slow axis of the second retardation layer 30 and the absorption axis of the polarizer 11 is 65 ° to 85 °, preferably 72 ° to 78 °, more preferably about 75 °.
  • the second retardation layer preferably has a relationship of refractive index characteristics of nx> ny ⁇ nz.
  • the in-plane retardation Re (550) of the second retardation layer is 110 nm to 125 nm, preferably 115 nm to 120 nm. As described above, the in-plane retardation of the first retardation layer is set slightly smaller than the so-called ⁇ / 2 plate, and the in-plane retardation of the second retardation layer is slightly smaller than the so-called ⁇ / 4 plate.
  • the optical retardation can be optically compensated by combining two retardation layers having the above-described characteristics, thereby causing the optical laminate to be subjected to the width direction of the optical laminate due to the retardation of the substrate and the variation in the width direction of the retardation.
  • the variation in display characteristics for each product can be reduced.
  • Such an effect cannot be obtained with a single retardation layer having characteristics optically equivalent to the combination of the two retardation layers. That is, such an effect is obtained only when an optical layered body is manufactured using a combination of the two retardation layers, and the optical layered body is further cut into a predetermined size and applied to an image display device. It is an unexpectedly excellent effect.
  • the in-plane retardation Re (550) of the substrate 42 is 3 nm to 6 nm, preferably 4 nm to 5 nm.
  • the variation of the retardation in the width direction of the substrate 42 is 10% to 30%, preferably 15% to 25%.
  • the variation in the slow axis direction in the width direction of the substrate 42 is 1 ° to 5 °, and preferably 1 ° to 3 °.
  • phase difference there is a phase difference in the base material, and even if there are variations in the width direction characteristics of the optical laminate due to variations in the phase difference and slow axis direction in the width direction,
  • optical compensation is performed by combining two specific retardation layers, thereby reducing variation in display characteristics for each product when the optical laminate is cut into a predetermined size and applied to an image display device.
  • “variation in phase difference” refers to the maximum value of variation with respect to the set phase difference
  • variant in the slow axis direction refers to the maximum value of variation in the set slow axis direction.
  • the width of the optical laminate is preferably 500 mm or more, and more preferably 800 mm or more.
  • the upper limit of the width is, for example, 1500 mm. The wider the width, the greater the variation in the characteristics in the width direction of the optical laminate due to the retardation of the substrate, and the effect of the present invention is remarkably exhibited.
  • first retardation layer 20 and the second retardation layer 30 are each made of a resin film.
  • first retardation layer 20 and the second retardation layer 30 may each be an alignment solidified layer of a liquid crystal compound.
  • the resin film will be described in detail in the sections C-2 and D-2, and the alignment solidified layer of the liquid crystal compound will be described in detail in the sections C-3 and D-3.
  • Each layer constituting the optical laminate other than the adhesion lamination of the conductive layer 41 and the substrate 42 may be laminated via any appropriate adhesive layer (adhesive layer or pressure-sensitive adhesive layer: not shown).
  • adhesive layer adhesive layer or pressure-sensitive adhesive layer: not shown.
  • they may be closely stacked.
  • the optical layered body preferably has a dimensional change rate of 1% or less, more preferably 0.95% or less.
  • the lower limit of the dimensional change rate of the optical laminated body is, for example, 0.01%. If the dimensional change rate of the optical laminate is in such a range, the occurrence of cracks in the conductive layer under high temperature and high humidity can be remarkably suppressed.
  • the total thickness of the optical laminated body is preferably 220 ⁇ m or less, more preferably 80 ⁇ m to 190 ⁇ m.
  • the total thickness of the optical laminate is preferably 175 ⁇ m or less, more preferably 80 ⁇ m to 140 ⁇ m. is there.
  • Polarizing plate B-1 Polarizer Any appropriate polarizer may be adopted as the polarizer 11.
  • the resin film forming the polarizer may be a single-layer resin film or a laminate of two or more layers.
  • polarizers composed of a single-layer resin film include hydrophilic polymer films such as polyvinyl alcohol (PVA) films, partially formalized PVA films, and ethylene / vinyl acetate copolymer partially saponified films.
  • PVA polyvinyl alcohol
  • polyene-based oriented films such as those subjected to dyeing treatment and stretching treatment with dichroic substances such as iodine and dichroic dyes, PVA dehydrated products and polyvinyl chloride dehydrochlorinated products.
  • a polarizer obtained by dyeing a PVA film with iodine and uniaxially stretching is used because of excellent optical properties.
  • the dyeing with iodine is performed, for example, by immersing a PVA film in an aqueous iodine solution.
  • the stretching ratio of the uniaxial stretching is preferably 3 to 7 times.
  • the stretching may be performed after the dyeing treatment or may be performed while dyeing. Moreover, you may dye
  • the PVA film is subjected to swelling treatment, crosslinking treatment, washing treatment, drying treatment and the like. For example, by immersing the PVA film in water and washing it before dyeing, not only can the surface of the PVA film be cleaned of dirt and anti-blocking agents, but the PVA film can be swollen to cause uneven staining. Can be prevented.
  • a polarizer obtained by using a laminate a laminate of a resin substrate and a PVA resin layer (PVA resin film) laminated on the resin substrate, or a resin substrate and the resin
  • a polarizer obtained by using a laminate with a PVA resin layer applied and formed on a substrate examples thereof include a polarizer obtained by using a laminate with a PVA resin layer applied and formed on a substrate.
  • a polarizer obtained by using a laminate of a resin base material and a PVA resin layer applied and formed on the resin base material may be obtained by, for example, applying a PVA resin solution to a resin base material and drying it.
  • a PVA-based resin layer is formed thereon to obtain a laminate of a resin base material and a PVA-based resin layer; the laminate is stretched and dyed to make the PVA-based resin layer a polarizer; obtain.
  • stretching typically includes immersing the laminate in an aqueous boric acid solution and stretching.
  • the stretching may further include, if necessary, stretching the laminate in the air at a high temperature (for example, 95 ° C. or higher) before stretching in the aqueous boric acid solution.
  • the obtained resin base material / polarizer laminate may be used as it is (that is, the resin base material may be used as a protective layer of the polarizer), and the resin base material is peeled from the resin base material / polarizer laminate.
  • Any appropriate protective layer according to the purpose may be laminated on the release surface. Details of a method for manufacturing such a polarizer are described in, for example, Japanese Patent Application Laid-Open No. 2012-73580. This publication is incorporated herein by reference in its entirety.
  • the thickness of the polarizer is preferably 18 ⁇ m or less, more preferably 1 ⁇ m to 12 ⁇ m, still more preferably 3 ⁇ m to 12 ⁇ m, and particularly preferably 5 ⁇ m to 12 ⁇ m.
  • the boric acid content of the polarizer is preferably 18% by weight or more, more preferably 18% by weight to 25% by weight. If the content of boric acid in the polarizer is in such a range, the ease of curling adjustment at the time of bonding is well maintained and the curling at the time of heating is achieved by a synergistic effect with the iodine content described later. It is possible to improve the appearance durability during heating while satisfactorily suppressing.
  • the boric acid content can be calculated as the amount of boric acid contained in the polarizer per unit weight using, for example, the following formula from the neutralization method.
  • the iodine content of the polarizer is preferably 2.1% by weight or more, more preferably 2.1% by weight to 3.5% by weight. If the iodine content of the polarizer is in this range, the curl adjustment at the time of bonding is well maintained and the curl at the time of heating is maintained by a synergistic effect with the boric acid content. It is possible to improve the appearance durability during heating while satisfactorily suppressing.
  • iodine content means the amount of all iodine contained in a polarizer (PVA resin film).
  • iodine exists in the form of iodine ions (I ⁇ ), iodine molecules (I 2 ), polyiodine ions (I 3 ⁇ , I 5 ⁇ ), etc. in the polarizer.
  • Iodine content means the amount of iodine encompassing all these forms.
  • the iodine content can be calculated, for example, by a calibration curve method of fluorescent X-ray analysis.
  • the polyiodine ion exists in a state where a PVA-iodine complex is formed in the polarizer. By forming such a complex, absorption dichroism can be developed in the wavelength range of visible light.
  • the complex of PVA and triiodide ions (PVA ⁇ I 3 ⁇ ) has an absorption peak around 470 nm, and the complex of PVA and pentaiodide ions (PVA ⁇ I 5 ⁇ ) is around 600 nm. Have an absorption peak.
  • polyiodine ions can absorb light in a wide range of visible light depending on their form.
  • iodine ion (I ⁇ ) has an absorption peak near 230 nm and is not substantially involved in the absorption of visible light. Therefore, polyiodine ions present in a complex state with PVA can be mainly involved in the absorption performance of the polarizer.
  • the polarizer preferably exhibits absorption dichroism at any wavelength between 380 nm and 780 nm.
  • the single transmittance of the polarizer is 43.0% to 46.0%, preferably 44.5% to 46.0%.
  • the polarization degree of the polarizer is preferably 97.0% or more, more preferably 99.0% or more, and further preferably 99.9% or more.
  • the first protective layer 12 is formed of any suitable film that can be used as a protective layer for a polarizer.
  • the material as the main component of the film include cellulose resins such as triacetyl cellulose (TAC), polyester-based, polyvinyl alcohol-based, polycarbonate-based, polyamide-based, polyimide-based, polyethersulfone-based, and polysulfone-based materials.
  • transparent resins such as polystyrene, polynorbornene, polyolefin, (meth) acryl, and acetate.
  • thermosetting resins such as (meth) acrylic, urethane-based, (meth) acrylurethane-based, epoxy-based, and silicone-based or ultraviolet curable resins are also included.
  • a glassy polymer such as a siloxane polymer is also included.
  • a polymer film described in JP-A-2001-343529 (WO01 / 37007) can also be used.
  • a resin composition containing a thermoplastic resin having a substituted or unsubstituted imide group in the side chain and a thermoplastic resin having a substituted or unsubstituted phenyl group and nitrile group in the side chain for example, a resin composition having an alternating copolymer of isobutene and N-methylmaleimide and an acrylonitrile / styrene copolymer can be mentioned.
  • the polymer film can be, for example, an extruded product of the resin composition.
  • the optical layered body of the present invention is typically disposed on the viewing side of the image display device, and the first protective layer 12 is typically disposed on the viewing side. Therefore, the first protective layer 12 may be subjected to a surface treatment such as a hard coat treatment, an antireflection treatment, an antisticking treatment, and an antiglare treatment as necessary. Further / or, if necessary, the first protective layer 12 is provided with a treatment for improving visibility when viewed through polarized sunglasses (typically, imparting an (elliptical) circular polarization function, (Giving an ultrahigh phase difference) may be applied. By performing such processing, excellent visibility can be achieved even when the display screen is viewed through a polarizing lens such as polarized sunglasses. Therefore, the optical laminate can be suitably applied to an image display device that can be used outdoors.
  • polarized sunglasses typically, imparting an (elliptical) circular polarization function, (Giving an ultrahigh phase difference
  • the thickness of the first protective layer any appropriate thickness can be adopted as long as the difference between the thickness of the desired polarizing plate and the thickness of the second protective layer can be obtained.
  • the thickness of the first protective layer is, for example, 10 ⁇ m to 50 ⁇ m, preferably 15 ⁇ m to 40 ⁇ m.
  • the thickness of the first protective layer is a thickness including the thickness of the surface treatment layer.
  • the second protective layer 13 is also formed of any suitable film that can be used as a protective layer for the polarizer.
  • the material constituting the main component of the film is as described in the section B-2 regarding the first protective layer.
  • the second protective layer 13 is preferably optically isotropic.
  • “optically isotropic” means that the in-plane retardation Re (550) is 0 nm to 10 nm and the thickness direction retardation Rth (550) is ⁇ 10 nm to +10 nm.
  • the thickness of the second protective layer is, for example, 15 ⁇ m to 35 ⁇ m, preferably 20 ⁇ m to 30 ⁇ m.
  • the difference between the thickness of the first protective layer and the thickness of the second protective layer is preferably 15 ⁇ m or less, more preferably 10 ⁇ m or less. If the difference in thickness is within such a range, curling at the time of bonding can be satisfactorily suppressed.
  • the thickness of the first protective layer and the thickness of the second protective layer may be the same, the first protective layer may be thicker, and the second protective layer may be thicker. . Typically, the first protective layer is thicker than the second protective layer.
  • the first retardation layer 20 has a slow axis as described above.
  • the angle formed between the slow axis of the first retardation layer 20 and the absorption axis of the polarizer 11 is preferably 10 ° to 20 °, more preferably 13 ° to 17 °, and even more preferably about 15 °. °. If the angle formed by the slow axis of the first retardation layer 20 and the absorption axis of the polarizer 11 is within such a range, the surfaces of the first retardation layer and the second retardation layer will be described later.
  • the circular polarization characteristics excellent in a wide band ( As a result, an optical laminate having very excellent antireflection properties can be obtained.
  • the first retardation layer preferably has a relationship in which the refractive index characteristic is nx> ny ⁇ nz.
  • the in-plane retardation Re (550) of the first retardation layer is 220 nm to 250 nm, preferably 230 nm to 240 nm.
  • the Nz coefficient of the first retardation layer is preferably 0.9 to 3, more preferably 0.9 to 2.5, still more preferably 0.9 to 1.5, and particularly preferably 0.9 to 1. 3. By satisfying such a relationship, a very excellent reflection hue can be achieved when the obtained optical laminate is used in an image display device.
  • the first retardation layer may exhibit a reverse dispersion wavelength characteristic in which the retardation value increases according to the wavelength of the measurement light, and has a positive chromatic dispersion characteristic in which the retardation value decreases according to the wavelength of the measurement light. It may also be possible to show a flat chromatic dispersion characteristic in which the phase difference value hardly changes depending on the wavelength of the measurement light. In one embodiment, the first retardation layer exhibits a flat wavelength dispersion characteristic in which the retardation value hardly changes depending on the wavelength of the measurement light.
  • Re (450) / Re (550) of the retardation layer is preferably from 0.99 to 1.03
  • Re (650) / Re (550) is preferably from 0.98 to 1.02. is there.
  • a first retardation layer having a flat chromatic dispersion characteristic and having a predetermined in-plane retardation and a second retardation layer having a flat chromatic dispersion characteristic and having a predetermined in-plane retardation have a predetermined slow axis.
  • the absolute value of the photoelastic coefficient of the first retardation layer is preferably 2 ⁇ 10 ⁇ 11 m 2 / N or less, more preferably 2.0 ⁇ 10 ⁇ 13 m 2 / N to 1.5 ⁇ 10 ⁇ 11. m 2 / N, more preferably from 1.0 ⁇ 10 -12 m 2 /N ⁇ 1.2 ⁇ 10 -11 m 2 / N resin.
  • the dimensional change rate of the first retardation layer is preferably 1% or less, and more preferably 0.95% or less.
  • the lower limit of the dimensional change rate of the first retardation layer is, for example, 0.01%.
  • the thickness is preferably 60 ⁇ m or less, and preferably 30 ⁇ m to 50 ⁇ m. If the thickness of the first retardation layer is in such a range, a desired in-plane retardation can be obtained.
  • the first retardation layer 20 can be composed of any appropriate resin film that can satisfy the characteristics described in the above section C-1.
  • Typical examples of such resins include cyclic olefin resins, polycarbonate resins, cellulose resins, polyester resins, polyvinyl alcohol resins, polyamide resins, polyimide resins, polyether resins, polystyrene resins, acrylic resins. Based resins.
  • a cyclic olefin-based resin can be suitably used.
  • the cyclic olefin-based resin is a general term for resins that are polymerized using a cyclic olefin as a polymerization unit, and is described in, for example, JP-A-1-240517, JP-A-3-14882, JP-A-3-122137, and the like. Resin. Specific examples include ring-opening (co) polymers of cyclic olefins, addition polymers of cyclic olefins, copolymers of cyclic olefins and ⁇ -olefins such as ethylene and propylene (typically random copolymers).
  • graft modified products in which these are modified with an unsaturated carboxylic acid or a derivative thereof, and hydrides thereof.
  • the cyclic olefin include norbornene monomers.
  • the norbornene-based monomer include norbornene and alkyl and / or alkylidene substituted products thereof such as 5-methyl-2-norbornene, 5-dimethyl-2-norbornene, 5-ethyl-2-norbornene, 5-butyl- 2-Norbornene, 5-ethylidene-2-norbornene, etc.
  • Polar group substitution products such as halogens; dicyclopentadiene, 2,3-dihydrodicyclopentadiene, etc .; dimethanooctahydronaphthalene, alkyl and / or alkylidene substitution thereof
  • polar group substituents such as halogen, for example, 6-methyl-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6-ethyl -1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahi Lonaphthalene, 6-ethylidene-1,4: 5,8-dimethano-1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6-chloro-1,4: 5,8-dimethano -1,4,4a, 5,6,7,8,8a-octahydronaphthalene, 6-cyano
  • cycloolefins capable of ring-opening polymerization can be used in combination as long as the object of the present invention is not impaired.
  • cycloolefins include compounds having one reactive double bond such as cyclopentene, cyclooctene, and 5,6-dihydrodicyclopentadiene.
  • the cyclic olefin resin preferably has a number average molecular weight (Mn) measured by a gel permeation chromatograph (GPC) method using a toluene solvent, preferably 25,000 to 200,000, more preferably 30,000 to 100,000. 000, most preferably 40,000 to 80,000.
  • Mn number average molecular weight measured by a gel permeation chromatograph (GPC) method using a toluene solvent, preferably 25,000 to 200,000, more preferably 30,000 to 100,000. 000, most preferably 40,000 to 80,000.
  • the hydrogenation rate is preferably 90% or more, more preferably 95% or more, Most preferably, it is 99% or more. Within such a range, the heat deterioration resistance and light deterioration resistance are excellent.
  • a commercially available film may be used as the cyclic olefin resin film.
  • Specific examples include trade names “ZEONEX” and “ZEONOR” manufactured by ZEON CORPORATION, “Arton” manufactured by JSR, “TOPAS” trade name manufactured by TICONA, and trade names manufactured by Mitsui Chemicals, Inc. “APEL” may be mentioned.
  • the first retardation layer 20 is obtained, for example, by stretching a film formed from the above cyclic olefin resin.
  • Any appropriate molding method can be adopted as a method of forming a film from a cyclic olefin-based resin. Specific examples include compression molding methods, transfer molding methods, injection molding methods, extrusion molding methods, blow molding methods, powder molding methods, FRP molding methods, cast coating methods (for example, casting methods), calendar molding methods, and hot presses. Law. Extrusion molding or cast coating is preferred. This is because the smoothness of the resulting film can be improved and good optical uniformity can be obtained.
  • the molding conditions can be appropriately set according to the composition and type of the resin used, the properties desired for the retardation layer, and the like. In addition, as above-mentioned, since many film products are marketed for cyclic olefin resin, you may use the said commercial film for an extending
  • the thickness of the resin film can be set to any appropriate value depending on the desired thickness of the first retardation layer, the desired optical properties, the stretching conditions described below, and the like.
  • the thickness is preferably 50 ⁇ m to 300 ⁇ m.
  • Any appropriate stretching method and stretching conditions may be employed for the stretching.
  • various stretching methods such as free end stretching, fixed end stretching, free end contraction, and fixed end contraction can be used singly or simultaneously or sequentially.
  • the stretching direction can also be performed in various directions and dimensions such as a length direction, a width direction, a thickness direction, and an oblique direction.
  • the stretching temperature is preferably Tg-30 ° C. to Tg + 60 ° C., more preferably Tg-10 ° C. to Tg + 50 ° C. with respect to the glass transition temperature (Tg) of the resin film.
  • a retardation film having the desired optical characteristics (for example, refractive index characteristics, in-plane retardation, Nz coefficient) can be obtained by appropriately selecting the stretching method and stretching conditions.
  • the retardation film can be produced by continuously stretching a long resin film obliquely in a direction at a predetermined angle with respect to the longitudinal direction.
  • a long stretched film having an orientation angle of a predetermined angle with respect to the longitudinal direction of the film (slow axis in the direction of the angle) can be obtained.
  • lamination with a polarizer At this time, roll-to-roll is possible, and the manufacturing process can be simplified.
  • the angle may be an angle formed between the absorption axis of the polarizer and the slow axis of the first retardation layer in the optical layered body. As described above, the angle is preferably 10 ° to 20 °, more preferably 13 ° to 17 °, and further preferably about 15 °.
  • Examples of the stretching machine used for the oblique stretching include a tenter type stretching machine capable of adding feed forces, pulling forces, or pulling forces at different speeds in the lateral and / or longitudinal directions.
  • the tenter type stretching machine includes a horizontal uniaxial stretching machine, a simultaneous biaxial stretching machine, and the like, but any suitable stretching machine can be used as long as a long resin film can be continuously stretched obliquely.
  • the first retardation layer substantially having the desired in-plane retardation and having the slow axis in the desired direction.
  • a long retardation film can be obtained.
  • the stretching temperature of the film can vary depending on the in-plane retardation value and thickness desired for the first retardation layer, the type of resin used, the thickness of the film used, the stretching ratio, and the like. Specifically, the stretching temperature is preferably Tg-30 ° C to Tg + 30 ° C, more preferably Tg-15 ° C to Tg + 15 ° C, and most preferably Tg-10 ° C to Tg + 10 ° C. By extending
  • the first retardation layer 20 may be a liquid crystal compound alignment solidified layer.
  • the difference between nx and ny of the obtained retardation layer can be remarkably increased as compared with the non-liquid crystal material. Therefore, the first retardation for obtaining a desired in-plane retardation is obtained.
  • the thickness of the layer can be significantly reduced. As a result, the optical laminate can be further reduced in thickness.
  • the first retardation layer 20 is composed of an alignment solidified layer of a liquid crystal compound, the thickness is preferably 1 ⁇ m to 7 ⁇ m, more preferably 1.5 ⁇ m to 2.5 ⁇ m.
  • the “alignment solidified layer” refers to a layer in which a liquid crystal compound is aligned in a predetermined direction in the layer and the alignment state is fixed.
  • the “alignment solidified layer” is a concept including an alignment cured layer obtained by curing a liquid crystal monomer as described later.
  • rod-like liquid crystal compounds are aligned in a state where they are aligned in the slow axis direction of the first retardation layer (homogeneous alignment).
  • the liquid crystal compound include a liquid crystal compound (nematic liquid crystal) whose liquid crystal phase is a nematic phase.
  • a liquid crystal compound for example, a liquid crystal polymer or a liquid crystal monomer can be used.
  • the liquid crystal compound may exhibit liquid crystallinity either lyotropic or thermotropic.
  • the liquid crystal polymer and the liquid crystal monomer may be used alone or in combination.
  • the liquid crystal monomer is preferably a polymerizable monomer and a crosslinkable monomer. This is because the alignment state of the liquid crystal monomer can be fixed by polymerizing or crosslinking (that is, curing) the liquid crystal monomer. After aligning the liquid crystal monomers, for example, if the liquid crystal monomers are polymerized or cross-linked, 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 first retardation layer for example, 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 first retardation layer is an extremely stable retardation layer that is not affected by temperature changes.
  • the temperature range in which the liquid crystal monomer exhibits liquid crystal properties varies depending on its type. Specifically, the temperature range is preferably 40 ° C. to 120 ° C., more preferably 50 ° C. to 100 ° C., and most preferably 60 ° C. to 90 ° C.
  • liquid crystal monomer any appropriate liquid crystal monomer can be adopted as the liquid crystal monomer.
  • the polymerizable mesogenic compounds described in JP-T-2002-533742 WO00 / 37585
  • EP358208 US521118)
  • EP66137 US4388453
  • WO93 / 22397 EP0266172
  • DE195504224 DE44081171
  • GB2280445 Specific examples of such a polymerizable mesogenic compound include, for example, trade name LC242 of BASF, trade name E7 of Merck, and trade name LC-Silicon-CC3767 of Wacker-Chem.
  • the liquid crystal monomer for example, a nematic liquid crystal monomer is preferable.
  • the alignment solidified layer of the liquid crystal compound is subjected to an alignment treatment on the surface of a predetermined substrate, and a coating liquid containing the liquid crystal compound is applied to the surface to align the liquid crystal compound in a direction corresponding to the alignment treatment, It can be formed by fixing the alignment state.
  • the liquid crystal compound can be aligned in a predetermined direction with respect to the long direction of the long substrate, and as a result, the liquid crystal compound is delayed in the predetermined direction of the formed retardation layer.
  • a phase axis can be developed. For example, a retardation layer having a slow axis in a direction of 15 ° with respect to the longitudinal direction can be formed on a long substrate.
  • Such a retardation layer can be laminated using roll-to-roll even when it is desired to have a slow axis in an oblique direction, so the productivity of the optical laminate is greatly improved.
  • the substrate is any suitable resin film, and the alignment solidified layer formed on the substrate can be transferred to the surface of the polarizing plate 10.
  • the substrate can be the second protective layer 13. In this case, the transfer step is omitted, and the lamination can be performed by roll-to-roll continuously from the formation of the alignment solidified layer (first retardation layer), so that the productivity is further improved.
  • any appropriate alignment treatment can be adopted as the alignment treatment.
  • 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.
  • Specific examples of 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.
  • Arbitrary appropriate conditions may be employ
  • the alignment of the liquid crystal compound is performed by processing at a temperature showing a liquid crystal phase according to the type of the liquid crystal compound.
  • the liquid crystal compound takes a liquid crystal state, and the liquid crystal compound is oriented according to the orientation treatment direction of the substrate surface.
  • the alignment state is fixed by cooling the liquid crystal compound aligned as described above.
  • the alignment state is fixed by subjecting the liquid crystal compound aligned as described above to a polymerization treatment or a crosslinking treatment.
  • liquid crystal compound and details of the method of forming the alignment solidified layer are described in JP-A No. 2006-163343. The description in this publication is incorporated herein by reference.
  • the second retardation layer 30 has a slow axis as described above.
  • the angle formed between the slow axis of the second retardation layer 30 and the absorption axis of the polarizer 11 is preferably 65 ° to 85 °, more preferably 72 ° to 78 °, and even more preferably about 75. °.
  • the angle formed by the slow axis of the second retardation layer 30 and the slow axis of the first retardation layer 20 is preferably 52 ° to 68 °, more preferably 57 ° to 63 °. More preferably, it is about 60 °.
  • the in-plane retardation of the first retardation layer is set within a predetermined range as described above.
  • the slow axis of the first retardation layer is arranged at a predetermined angle with respect to the absorption axis of the polarizer, and the in-plane retardation of the second retardation layer is set within a predetermined range as will be described later.
  • the second retardation layer preferably has a relationship of refractive index characteristics of nx> ny ⁇ nz.
  • the in-plane retardation Re (550) of the second retardation layer is 110 nm to 125 nm, preferably 115 nm to 120 nm.
  • the dimensional change rate of the second retardation layer is preferably 1% or less, more preferably 0.95% or less.
  • the lower limit of the dimensional change rate of the second retardation layer is, for example, 0.01%.
  • the thickness is preferably 40 ⁇ m or less, and preferably 25 ⁇ m to 35 ⁇ m. If the thickness of the second retardation layer is within such a range, a desired in-plane retardation can be obtained.
  • the second retardation layer is formed of a resin film, the material, characteristics, manufacturing method, and the like are as described in the above section C-2 for the first retardation layer.
  • the second retardation layer 30 may be a liquid crystal compound alignment / solidification layer in the same manner as the first retardation layer.
  • the thickness is preferably 0.5 ⁇ m to 2 ⁇ m, more preferably 1 ⁇ m to 1.5 ⁇ m.
  • the second retardation layer is composed of an alignment solidified layer of a liquid crystal compound, the material, characteristics, manufacturing method, and the like are as described in the above section C-3 for the first retardation layer.
  • first retardation layer and the second retardation layer may be used as any appropriate combination.
  • the first retardation layer may be composed of a resin film
  • the second retardation layer may be composed of an alignment solidified layer of a liquid crystal compound; the first retardation layer is aligned and solidified of a liquid crystal compound.
  • the second retardation layer may be composed of a resin film; both the first retardation layer and the second retardation layer may be composed of a resin film; Both the phase difference layer and the second phase difference layer may be composed of an alignment solidified layer of a liquid crystal compound.
  • the second retardation layer is also composed of a resin film; the first retardation layer is composed of an alignment solidified layer of a liquid crystal compound.
  • the second retardation layer is also composed of an alignment solidified layer of a liquid crystal compound.
  • the first retardation layer and the second retardation layer may be the same, and the detailed configuration May be different. The same applies to the case where both the first retardation layer and the second retardation layer are composed of an alignment solidified layer of a liquid crystal compound.
  • the conductive layer can be formed on a metal oxide film on any suitable substrate by any suitable film formation method (eg, vacuum deposition, sputtering, CVD, ion plating, spraying, etc.). Can be formed. After film formation, heat treatment (for example, 100 ° C. to 200 ° C.) may be performed as necessary. By performing the heat treatment, the amorphous film can be crystallized.
  • suitable film formation method eg, vacuum deposition, sputtering, CVD, ion plating, spraying, etc.
  • heat treatment for example, 100 ° C. to 200 ° C.
  • the metal oxide include indium oxide, tin oxide, zinc oxide, indium-tin composite oxide, tin-antimony composite oxide, zinc-aluminum composite oxide, and indium-zinc composite oxide.
  • the indium oxide may be doped with divalent metal ions or tetravalent metal ions.
  • Indium composite oxides are preferable, and indium-tin composite oxide (ITO) is more preferable.
  • Indium composite oxides are characterized by high transmittance (for example, 80% or more) in the visible light region (380 nm to 780 nm) and low surface resistance per unit area.
  • the thickness of the conductive layer is preferably 50 nm or less, more preferably 35 nm or less.
  • the lower limit of the thickness of the conductive layer is preferably 10 nm.
  • the surface resistance value of the conductive layer is preferably 300 ⁇ / ⁇ or less, more preferably 150 ⁇ / ⁇ or less, and further preferably 100 ⁇ / ⁇ or less.
  • the conductive layer can be patterned as needed. By conducting the patterning, a conductive portion and an insulating portion can be formed. Any appropriate method can be adopted as the patterning method. Specific examples of the patterning method include a wet etching method and a screen printing method.
  • Base material Any appropriate resin film may be used as the base material.
  • a resin film having excellent transparency is preferable.
  • Specific examples of the constituent material include a cyclic olefin resin, a polycarbonate resin, a cellulose resin, a polyester resin, and an acrylic resin.
  • the base material has an in-plane retardation and a slow axis, and the in-plane retardation and the slow axis have variations in the width direction.
  • the optical laminate is cut into a predetermined size and applied to the image display device even in the case where there is a variation in characteristics in the width direction due to such a base material. In this case, variation in display characteristics for each product can be reduced.
  • the thickness of the substrate is preferably 10 ⁇ m to 200 ⁇ m, more preferably 20 ⁇ m to 60 ⁇ m.
  • a hard coat layer (not shown) may be provided between the conductive layer 41 and the base material 42.
  • a hard coat layer having any appropriate configuration can be used.
  • the thickness of the hard coat layer is, for example, 0.5 ⁇ m to 2 ⁇ m. If the haze is in an allowable range, fine particles for reducing Newton rings may be added to the hard coat layer.
  • the anchor coat layer for improving the adhesion of the conductive layer and / or the reflectance is adjusted between the conductive layer 41 and the base material 42 (a hard coat layer if present).
  • a refractive index adjustment layer may be provided. Arbitrary appropriate structures may be employ
  • the anchor coat layer and the refractive index adjusting layer can be thin layers of several nm to several tens of nm.
  • the hard coat layer typically includes a binder resin layer and spherical particles, and the spherical particles protrude from the binder resin layer to form convex portions. Details of such a hard coat layer are described in JP-A-2013-145547, and the description of the gazette is incorporated herein by reference.
  • the optical layered body according to the embodiment of the present invention may further include other retardation layers.
  • the optical characteristics for example, refractive index characteristics, in-plane retardation, Nz coefficient, photoelastic coefficient
  • thickness, arrangement position, and the like of other retardation layers can be appropriately set according to the purpose.
  • an adhesive layer (not shown) for bonding to the display cell is provided on the surface of the base material 42. It is preferable that a release film is bonded to the surface of the pressure-sensitive adhesive layer until the optical layered body is used.
  • the present invention includes an image display device using such an optical laminate.
  • Typical examples of the image display device include a liquid crystal display device and an organic EL display device.
  • An image display device according to an embodiment of the present invention includes the optical layered body described in the items A to G cut to a predetermined size on the viewing side.
  • the optical laminated body is laminated so that the conductive layer is on the display cell (for example, liquid crystal cell, organic EL cell) side (so that the polarizer is on the viewing side).
  • the image display device can be a so-called inner touch panel type input display device in which a touch sensor is incorporated between a display cell (for example, a liquid crystal cell or an organic EL cell) and a polarizing plate.
  • the touch sensor can be disposed between the conductive layer (or the conductive layer with the base material) and the display cell.
  • a configuration well known in the industry can be adopted, and a detailed description thereof will be omitted.
  • the present invention will be specifically described by way of examples, but the present invention is not limited to these examples.
  • the measuring method of each characteristic is as follows.
  • the applied retardation layer (alignment solidified layer of liquid crystal compound) was measured by an interference film thickness measurement method using MCPD2000 manufactured by Otsuka Electronics. The other films were measured using a digital micrometer (KC-351C manufactured by Anritsu).
  • Retardation value Refractive index nx, ny and nz of the retardation layer and the base material used in the examples and comparative examples are determined based on an automatic birefringence measuring device (manufactured by Oji Scientific Instruments, automatic birefringence meter KOBRA-WPR). ).
  • the measurement wavelength of the in-plane retardation Re was 450 nm and 550 nm
  • the measurement wavelength of the thickness direction retardation Rth was 550 nm
  • the measurement temperature was 23 ° C.
  • Variation in retardation value and slow axis direction In the width direction of the film roll (polycycloolefin film roll of Reference Example 5) constituting the base material of the conductive layer with base material used in Examples and Comparative Examples Five samples of 50 mm ⁇ 50 mm were cut out at intervals.
  • an in-plane phase difference Re (550) and a slow axis were determined using an automatic birefringence measuring apparatus (manufactured by Oji Scientific Instruments Co., Ltd., automatic birefringence meter KOBRA-WPR).
  • the maximum variation (%) with respect to the set phase difference was defined as the phase difference variation
  • the maximum variation with respect to the set slow axis direction was defined as the slow axis direction variation.
  • (4) Display characteristics of image display device A smartphone (Galaxy-S5) manufactured by Samsung Radio Co., Ltd. was disassembled and an organic EL panel was taken out.
  • the weight ratio of iodine and potassium iodide is 1: 7, the iodine concentration of which is adjusted so that the single transmittance of the obtained polarizer is 45.0%.
  • the film was stretched 1.4 times.
  • the crosslinking treatment employed a two-stage crosslinking treatment, and the first-stage crosslinking treatment was stretched 1.2 times while being treated in an aqueous solution in which boric acid and potassium iodide were dissolved at 40 ° C.
  • the boric acid content of the aqueous solution of the first-stage crosslinking treatment was 5.0% by weight, and the potassium iodide content was 3.0% by weight.
  • the cross-linking treatment at the second stage was stretched 1.6 times while being treated in an aqueous solution in which boric acid and potassium iodide were dissolved at 65 ° C.
  • the boric acid content of the aqueous solution of the second crosslinking treatment was 4.3% by weight, and the potassium iodide content was 5.0% by weight.
  • the cleaning treatment was performed with an aqueous potassium iodide solution at 20 ° C.
  • the potassium iodide content of the aqueous solution for the washing treatment was 2.6% by weight.
  • the drying process was performed at 70 ° C. for 5 minutes to obtain a long polarizer 1.
  • HC-TAC film thickness: 32 ⁇ m, corresponding to the first protective layer
  • HC hard coat
  • the conditions of the alignment treatment are as follows: the number of rubbing times (the number of rubbing rolls) is 1, the rubbing roll radius r is 76.89 mm, the rubbing roll rotational speed nr is 1500 rpm, the film transport speed v is 83 mm / sec, the rubbing strength RS and the pushing amount M was performed under five conditions (a) to (e) as shown in Table 1.
  • the direction of the orientation treatment was set to a ⁇ 75 ° direction when viewed from the viewing side with respect to the direction of the absorption axis of the polarizer when being bonded to the polarizing plate.
  • the liquid crystal coating liquid was applied to the alignment-treated surface with a bar coater, and the liquid crystal compound was aligned by heating and drying at 90 ° C. for 2 minutes. Under the conditions (a) to (c), the alignment state of the liquid crystal compound was very good. Under the conditions (d) and (e), a slight disturbance occurred in the alignment of the liquid crystal compound, but the level was not problematic for practical use.
  • the liquid crystal layer thus formed is irradiated with 1 mJ / cm 2 of light using a metal halide lamp, and the liquid crystal layer is cured to form a retardation layer (liquid crystal alignment solidified on a long PET film).
  • Layer 1 was formed.
  • the thickness of the retardation layer 1 was 2 ⁇ m, and the in-plane retardation Re (550) was 236 nm.
  • Nitrogen was introduced into the first reactor and the pressure was once restored to atmospheric pressure, and then the oligomerized reaction liquid in the first reactor was transferred to the second reactor. Subsequently, the temperature increase and pressure reduction in the second reactor were started, and the internal temperature was 240 ° C. and the pressure was 0.2 kPa in 50 minutes. Thereafter, polymerization was allowed to proceed until a predetermined stirring power was obtained.
  • the obtained polycarbonate resin was vacuum-dried at 80 ° C. for 5 hours, and then a single-screw extruder (manufactured by Isuzu Chemical Industries, screw diameter 25 mm, cylinder set temperature: 220 ° C.), T-die (width 900 mm, set temperature: 220). ° C), a chill roll (set temperature: 125 ° C), and a film-forming apparatus equipped with a winder, a polycarbonate resin film having a thickness of 130 ⁇ m was produced.
  • the polycarbonate resin film obtained as described above was obliquely stretched by a method according to Example 1 of JP 2014-194383 A to obtain a retardation film. That is, using the apparatus shown in FIGS. 2 to 5, the film was subjected to pre-heat treatment, oblique stretching and MD shrinkage treatment with a clip pitch profile as shown in FIG. 6 to obtain a retardation film.
  • the description in Japanese Patent Application Laid-Open No. 2014-194383 is incorporated herein by reference.
  • the specific production procedure of the retardation film is as follows: A polycarbonate resin film (thickness 130 ⁇ m, width 765 mm) was preheated to 142 ° C.
  • the clip pitch of the left and right clips was 125 mm.
  • the clip pitch of the right clip began to increase and increased from 125 mm to 177.5 mm in the first oblique stretching zone C1.
  • the clip pitch change rate was 1.42.
  • the clip pitch of the left clip started to decrease and decreased from 125 mm to 90 mm in the first oblique stretching zone C1.
  • the clip pitch change rate was 0.72.
  • the clip pitch of the left clip started to increase and increased from 90 mm to 177.5 mm in the second oblique stretching zone C2.
  • the clip pitch of the right clip was maintained at 177.5 mm in the second oblique stretching zone C2.
  • stretching in the width direction was performed 1.9 times.
  • the oblique stretching was performed at 135 ° C.
  • MD shrinkage treatment Next, MD shrinkage treatment was performed in the shrinkage zone. Specifically, the clip pitches of the left clip and right clip were both reduced from 177.5 mm to 165 mm. The shrinkage rate in the MD shrinkage treatment was 7.0%.
  • a retardation film (thickness 50 ⁇ m) was obtained as described above.
  • the retardation Re (550) of the obtained retardation film was 141 nm, the birefringence [Delta] n xy was 0.00282.
  • the obtained retardation film was designated as a retardation layer 3.
  • the polycycloolefin film on which the amorphous layer of indium tin oxide was formed was heat-treated in a heating oven at 130 ° C. for 90 minutes to produce a transparent conductive film having a surface resistance value of 100 ⁇ / ⁇ .
  • the in-plane retardation Re (550) of the substrate was 4 nm, the variation in retardation in the width direction was 20%, and the variation in orientation angle (slow axis direction) in the width direction was 2 °.
  • Reference Example 6 Production of conductive film (conductive layer with substrate)]
  • a transparent conductive film having a surface resistance value of 100 ⁇ / ⁇ was prepared in the same manner as in Reference Example 5 except that a PET film having a thickness of 50 ⁇ m (trade name “Lumirror # 50” manufactured by Toray Industries, Inc.) was used as the substrate.
  • Example 1 The 2nd protective layer surface of the polarizing plate 1 and the phase difference layer 1 were bonded together by the roll toe roll through the acrylic adhesive with a thickness of 5 micrometers. As a result, the angle formed by the absorption axis of the polarizer and the slow axis of the retardation layer 1 was 15 °. Next, the PET film on which the retardation layer 1 was formed was peeled off, and the retardation layer 2 was bonded to the peeled surface by roll-to-roll through an acrylic adhesive having a thickness of 5 ⁇ m. As a result, the angle formed by the absorption axis of the polarizer and the slow axis of the retardation layer 2 was 75 °.
  • the PET film on which the retardation layer 2 was formed was peeled off to obtain a circularly polarizing plate 1 having a configuration of polarizing plate / first retardation layer / second retardation layer.
  • the second retardation layer of the circularly polarizing plate 1 and the conductive layer of the conductive layer with the base material obtained in Reference Example 5 were bonded together by a roll-to-roll through the adhesive layer A, and were elongated (with a width of 500 mm).
  • a roll-shaped optical laminate 1 was obtained.
  • the obtained optical laminated body 1 was used for evaluation of said (4). The results are shown in Table 2.
  • the optical layered body of the present invention is suitably used for image display devices such as liquid crystal display devices and organic EL display devices, and can be particularly suitably used as an antireflection film for organic EL display devices. Furthermore, the optical layered body of the present invention can be suitably used for an inner touch panel type input display device.

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Abstract

L'invention concerne un corps stratifié optique long grâce auquel une variation dans des caractéristiques d'affichage entre chaque produit peut être réduite lorsque le corps stratifié optique long est découpé à une dimension prédéterminée et appliqué dans un dispositif d'affichage d'image. Le corps stratifié optique est long, et a une plaque de polarisation comprenant un polariseur et une couche protectrice sur au moins un côté du polariseur, une première couche à différence de phase, une seconde couche à différence de phase, une couche électroconductrice, et un substrat stratifié de façon adhésive sur la couche électroconductrice, dans cet ordre. La différence de phase dans le plan Re (550) du substrat est de 3 nm à 6 nm, la variation de différence de phase dans la direction de la largeur est de 10 % à 30 %, et la variation de direction d'axe lent dans la direction de la largeur est de 1° à 5°. La différence de phase dans le plan Re (550) de la première couche à différence de phase est de 220 nm à 250 nm, l'angle formé par l'axe lent de la première couche à différence de phase et l'axe d'absorption du polariseur est de 10° à 20°, la différence de phase dans le plan Re (550) de la seconde couche à différence de phase est de 110 nm à 125 nm, et l'angle formé par l'axe lent de la seconde couche à différence de phase et l'axe d'absorption du polariseur est de 65° à 85°.
PCT/JP2016/084385 2015-12-02 2016-11-21 Corps stratifié optique long et dispositif d'affichage d'image WO2017094539A1 (fr)

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WO2019203008A1 (fr) * 2018-04-20 2019-10-24 日東電工株式会社 Plaque polarisante avec couche de déphasage et dispositif d'affichage el organique

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112105970B (zh) * 2018-04-27 2022-05-31 日本瑞翁株式会社 宽带波长膜及其制造方法、以及圆偏振膜的制造方法
KR102521527B1 (ko) * 2018-10-15 2023-04-14 닛토덴코 가부시키가이샤 위상차층 부착 편광판 및 이를 이용한 화상 표시 장치
CN111045135B (zh) * 2018-10-15 2023-08-22 日东电工株式会社 带相位差层的偏振片及使用了该带相位差层的偏振片的图像显示装置
KR102476698B1 (ko) * 2018-10-15 2022-12-14 닛토덴코 가부시키가이샤 위상차층 부착 편광판 및 이를 이용한 화상 표시 장치
KR102536728B1 (ko) * 2018-10-15 2023-05-26 닛토덴코 가부시키가이샤 위상차층 부착 편광판 및 이를 이용한 화상 표시 장치
JP6890162B2 (ja) * 2018-10-15 2021-06-18 日東電工株式会社 位相差層付偏光板およびそれを用いた画像表示装置
JP6890160B2 (ja) * 2018-10-15 2021-06-18 日東電工株式会社 位相差層付偏光板およびそれを用いた画像表示装置
JP6890161B2 (ja) * 2018-10-15 2021-06-18 日東電工株式会社 位相差層付偏光板およびそれを用いた画像表示装置
CN113631972A (zh) * 2019-03-27 2021-11-09 日东电工株式会社 带相位差层的偏光板
JPWO2020241705A1 (fr) * 2019-05-28 2020-12-03
JP7382801B2 (ja) * 2019-11-12 2023-11-17 日東電工株式会社 位相差層付偏光板および画像表示装置
JP6986616B2 (ja) 2019-12-10 2021-12-22 住友化学株式会社 積層体及び光学積層体
CN111308603A (zh) * 2020-04-09 2020-06-19 四川龙华光电薄膜股份有限公司 一种斜向光轴相位差膜
KR20210135888A (ko) * 2020-05-06 2021-11-16 삼성에스디아이 주식회사 편광판 및 이를 포함하는 광학표시장치
JP7046127B6 (ja) * 2020-07-28 2023-12-18 日東電工株式会社 光学積層体および該光学積層体の位相差層付偏光板を含む画像表示装置
CN114495721B (zh) * 2022-02-07 2023-09-01 武汉华星光电半导体显示技术有限公司 显示面板及显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000111896A (ja) * 1998-08-04 2000-04-21 Kanegafuchi Chem Ind Co Ltd タッチパネル付き液晶表示装置及びタッチパネル
JP2002311239A (ja) * 2001-04-16 2002-10-23 Nitto Denko Corp １／４波長板、円偏光板及び表示装置
JP2004020701A (ja) * 2002-06-13 2004-01-22 Nippon Zeon Co Ltd 光学積層体
JP2015069158A (ja) * 2013-09-30 2015-04-13 大日本印刷株式会社 光学フィルム、画像表示装置及び光学フィルムの製造方法
JP2015232647A (ja) * 2014-06-10 2015-12-24 日東電工株式会社 積層体および画像表示装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1457792A1 (fr) 1998-10-30 2004-09-15 Teijin Limited Film à différence de phase et dispositif optique dans lequel il est utilisé
JP2002372622A (ja) 2001-06-14 2002-12-26 Nitto Denko Corp 複合位相差板、円偏光板及び液晶表示装置、有機ｅｌ表示装置
JP2003036143A (ja) 2001-07-25 2003-02-07 Sumitomo Chem Co Ltd インナータッチパネル
JP2003311239A (ja) 2002-04-23 2003-11-05 Matsushita Electric Works Ltd 生ごみ処理装置
TWI308659B (en) * 2004-09-27 2009-04-11 Far Eastern Textile Ltd Process for orienting rod-like liquid crystal molecules, and optical elements produced by using the same
TW201145112A (en) * 2010-02-24 2011-12-16 Alps Electric Co Ltd Operating device
JP4963523B2 (ja) * 2010-07-07 2012-06-27 アルプス電気株式会社 入力装置
JP5576238B2 (ja) * 2010-10-25 2014-08-20 京セラディスプレイ株式会社 液晶表示装置
TW201425814A (zh) * 2012-12-26 2014-07-01 鴻海精密工業股份有限公司 發光二極體模組及其製造方法
JP2014170221A (ja) * 2013-02-07 2014-09-18 Nitto Denko Corp 円偏光板および屈曲可能な表示装置
KR102401054B1 (ko) * 2013-04-10 2022-05-20 니폰 제온 가부시키가이샤 정전 용량식 터치 패널 부착 표시 장치
KR102158658B1 (ko) * 2013-05-16 2020-09-22 니폰 제온 가부시키가이샤 정전 용량식 터치 패널 부착 표시 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000111896A (ja) * 1998-08-04 2000-04-21 Kanegafuchi Chem Ind Co Ltd タッチパネル付き液晶表示装置及びタッチパネル
JP2002311239A (ja) * 2001-04-16 2002-10-23 Nitto Denko Corp １／４波長板、円偏光板及び表示装置
JP2004020701A (ja) * 2002-06-13 2004-01-22 Nippon Zeon Co Ltd 光学積層体
JP2015069158A (ja) * 2013-09-30 2015-04-13 大日本印刷株式会社 光学フィルム、画像表示装置及び光学フィルムの製造方法
JP2015232647A (ja) * 2014-06-10 2015-12-24 日東電工株式会社 積層体および画像表示装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019203008A1 (fr) * 2018-04-20 2019-10-24 日東電工株式会社 Plaque polarisante avec couche de déphasage et dispositif d'affichage el organique
JP2019191282A (ja) * 2018-04-20 2019-10-31 日東電工株式会社 位相差層付き偏光板および有機ｅｌ表示装置

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