WO2017098970A1 - Plaque de polarisation circulaire et dispositif d'affichage d'image flexible l'utilisant - Google Patents

Plaque de polarisation circulaire et dispositif d'affichage d'image flexible l'utilisant Download PDF

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Publication number
WO2017098970A1
WO2017098970A1 PCT/JP2016/085470 JP2016085470W WO2017098970A1 WO 2017098970 A1 WO2017098970 A1 WO 2017098970A1 JP 2016085470 W JP2016085470 W JP 2016085470W WO 2017098970 A1 WO2017098970 A1 WO 2017098970A1
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Prior art keywords
polarizing plate
layer
film
retardation
circularly polarizing
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PCT/JP2016/085470
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English (en)
Japanese (ja)
Inventor
理 小島
清水　享
武田　健太郎
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日東電工株式会社
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Priority claimed from JP2016222204A external-priority patent/JP6920047B2/ja
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to CN201680071187.1A priority Critical patent/CN108292005A/zh
Priority to KR1020187016410A priority patent/KR102563679B1/ko
Priority to SG11201804822YA priority patent/SG11201804822YA/en
Publication of WO2017098970A1 publication Critical patent/WO2017098970A1/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
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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 circularly polarizing plate and a flexible image display device using the same.
  • the organic EL display device having a flexible or bendable (foldable) structure is being put into practical use by making use of a characteristic that the liquid crystal display device does not have.
  • a conventional circularly polarizing plate is used, there is a problem that undesired bending and / or warping occurs in the organic EL display device.
  • the present invention has been made to solve the above-described conventional problems, and a main object of the present invention is to reduce the curl due to both state change and change over time, and when applied to a flexible image display device, the image display device.
  • An object of the present invention is to provide a circularly polarizing plate that can suppress undesired bending and warping.
  • the circularly polarizing plate of the present invention has a first protective layer, a polarizer, a second protective layer, and a retardation layer having an in-plane retardation Re (550) of 80 nm to 200 nm in this order.
  • the moisture permeability of the second protective layer at 40 ° C. and a relative humidity of 92% is less than 160 g / m 2 / 24H.
  • This circularly polarizing plate is used for a flexible image display device.
  • the second protective layer is omitted, and the retardation layer also serves as a protective layer of the polarizer, and the moisture permeability of the retardation layer at 40 ° C. and a relative humidity of 92% is 160 g / m.
  • an angle ⁇ between the absorption axis of the polarizer and the slow axis of the retardation layer is 35 ° to 55 °.
  • the circularly polarizing plate further has a hard coat layer on the outside of the first protective layer.
  • the circularly polarizing plate further has an adhesive layer on the outermost side on the retardation layer side, and a release liner is temporarily attached to the surface of the adhesive layer.
  • the circularly polarizing plate has a surface protective film temporarily attached to the outermost part on the first protective layer side.
  • the circularly polarizing plate has a state in which the release liner and the surface protective film are temporarily attached; a state in which the release liner is peeled and removed, and a state in which the surface protective film is temporarily attached; and In each state where the release liner and the surface protective film are peeled and removed, the curl amount when placed in an environment of 25 ° C. ⁇ 5 ° C. and a relative humidity of 55% ⁇ 10% for 72 hours is within ⁇ 6 mm.
  • a flexible image display device is provided. This image display device includes the circularly polarizing plate described above.
  • the state change (typically peeling of the surface protective film and / or peeling of the release liner) is achieved by optimizing the moisture permeability of the layer adjacent to the display cell side of the polarizer in the circularly polarizing plate. ) As well as a change with time, a circularly polarizing plate having a small curl can be realized. As a result, when the circularly polarizing plate is applied to a flexible image display device, undesired bending and warping of the image display device can be satisfactorily suppressed.
  • 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 a circularly polarizing plate according to one embodiment of the present invention.
  • the circularly polarizing plate 100 of the present embodiment includes the first protective layer 11, the polarizer 20, the second protective layer 12, and the retardation layer 30 in this order.
  • the first protective layer 11 is on the viewing side
  • the retardation layer 30 is on the display cell side of the image display device.
  • the in-plane retardation Re (550) of the retardation layer 30 is 80 nm to 200 nm.
  • the retardation layer 30 typically functions as a so-called ⁇ / 4 plate.
  • the angle ⁇ formed by the absorption axis of the polarizer 20 and the slow axis of the retardation layer 30 is typically 35 ° to 55 °, preferably 38 ° to 52 °, more preferably 42 ° to 48 °, more preferably about 45 °.
  • the circularly polarizing plate 100 may further include a hard coat layer 40 on the outer side of the first protective layer 11 as shown in the illustrated example.
  • the circularly polarizing plate 100 may further include another retardation layer (not shown).
  • the optical characteristics for example, in-plane retardation, thickness direction retardation, Nz coefficient, refractive index characteristic), number, combination, arrangement position, and the like of another retardation layer can be appropriately set according to the purpose.
  • the circularly polarizing plate 100 may further include a conductive layer or an isotropic substrate with a conductive layer (both not shown). In this case, the circularly polarizing plate can be applied to a so-called inner touch panel type input display device in which a touch sensor is incorporated between a display cell (for example, an organic EL cell) and a polarizing plate.
  • the circularly polarizing plate 100 may further include an adhesive layer 50 on the outermost side on the phase difference layer 30 side as shown in the example of the drawing.
  • the pressure-sensitive adhesive layer By providing the pressure-sensitive adhesive layer in advance, it can be easily bonded to another optical member (for example, a display cell of an image display device).
  • the release liner 60 is temporarily attached to the surface of the pressure-sensitive adhesive layer 50 to protect the pressure-sensitive adhesive layer 50 until the circularly polarizing plate is used.
  • the surface protective film 70 may be temporarily attached to the outermost part by the side of the 1st protective layer 11 like the example of illustration.
  • surface protective film means a film that temporarily protects the circularly polarizing plate during work, and a protective layer of a polarizer such as the first protective layer 11 and the second protective layer 12. It is different from (polarizer protective film).
  • Each layer or optical film constituting the circularly polarizing plate is laminated via any appropriate adhesive layer (adhesive layer or pressure-sensitive adhesive layer).
  • adhesive layer adhesive layer or pressure-sensitive adhesive layer.
  • a typical example of the adhesive constituting the adhesive layer is a polyvinyl alcohol-based adhesive.
  • a typical example of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is an acrylic pressure-sensitive adhesive.
  • the moisture permeability of the second protective layer 12 at 40 ° C. and a relative humidity of 92% is less than 160 g / m 2 / 24H.
  • the second protective layer 12 is omitted, and the retardation layer 30 can also serve as the protective layer of the polarizer 20.
  • the moisture permeability of the retardation layer 30 at 40 ° C. and a relative humidity of 92% may be less than 160 g / m 2 / 24H. That is, according to the embodiment of the present invention, by changing the moisture permeability of the layer adjacent to the display cell side of the polarizer 20, the state change (typically, the peeling of the surface protective film and / or the release liner is performed).
  • a circularly polarizing plate having a small curl can be realized by any of the above-mentioned and peeling over time.
  • the embodiment of the present invention solves the problem that has become apparent for the first time when a circularly polarizing plate is applied to a flexible (or foldable) image display device.
  • the moisture permeability of the film is affected by both the properties of the film constituent material itself and the film thickness, while maintaining the optical properties desired for the layer (film) adjacent to the display cell side of the polarizer, This is an unexpected and excellent effect obtained through repeated trial and error regarding optimization of materials and thickness.
  • the moisture permeability can be measured according to JIS Z 0208 (cup method).
  • the release liner 60 and the surface protective film 70 are temporarily attached; (ii) the release liner 60 is peeled and removed, and the surface protective film 70 is temporarily attached. And (iii) in an environment of 25 ° C. ⁇ 5 ° C. and a relative humidity of 55% ⁇ 10% in each state where the release liner 60 and the surface protection film 70 are peeled and removed (typically, a clean room environment)
  • the curl amount when placed in the lower part for 72 hours is preferably within ⁇ 6 mm, more preferably within ⁇ 5 mm, and even more preferably within ⁇ 4 mm.
  • the circularly polarizing plate according to the embodiment of the present invention is characterized in that the curl amount due to the change with time in the state (iii) is small. That is, the curl control in the states (i) and (ii) has been conventionally performed, and in the conventional rigid image display device, only the curl control in these states is sufficient. On the other hand, it has been found that by setting the curl amount due to a change with time in the state (iii) within the above range, bending and warping of the flexible (or foldable) image display device itself can be satisfactorily suppressed. By optimizing the moisture permeability of the layer adjacent to the display cell side of the polarizer as described above, it is possible to control the curl amount due to the change with time in the state (iii).
  • the first protective layer 11 is formed of any appropriate 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 thickness of the first protective layer any appropriate thickness can be adopted as long as the effect of the present invention is obtained.
  • the thickness of the first protective layer is, for example, 5 ⁇ m to 70 ⁇ m, preferably 15 ⁇ m to 50 ⁇ m.
  • the thickness of the first protective layer is a thickness including the thickness of the surface treatment layer.
  • the circularly polarizing plate of the present invention is typically disposed on the viewing side of the image display device, and the first protective layer 11 is typically disposed on the viewing side. Therefore, the first protective layer 11 may be subjected to any appropriate surface treatment depending on the purpose.
  • a hard coat process is performed and the hard coat layer 40 may be provided as described above.
  • the material constituting the hard coat layer include an ultraviolet curable resin mainly composed of an acrylic resin (acrylate, urethane acrylate) and an epoxy resin.
  • the hard coat layer is formed by coating and drying a solution containing such a monomer or oligomer of an ultraviolet curable resin and, if necessary, a photopolymerization initiator and a leveling agent on the first protective layer.
  • the first protective layer 11 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.
  • polarized sunglasses typically, imparting an (elliptical) circular polarization function, (Giving an ultrahigh phase difference) may be applied.
  • Polarizer 20 Any appropriate polarizer may be adopted as the polarizer 20.
  • 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 25 ⁇ m or less, more preferably 1 ⁇ m to 22 ⁇ m, still more preferably 1 ⁇ m to 12 ⁇ m, and particularly preferably 3 ⁇ m to 12 ⁇ m.
  • the thickness of the polarizer is in such a range, curling during heating can be satisfactorily suppressed, and good appearance durability during heating can be obtained.
  • 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 second protective layer 12 has a moisture permeability of less than 160 g / m 2 / 24H, preferably 155 g / m 2 / 24H or less, as described above, at 40 ° C. and a relative humidity of 92%. Preferably it is 150 g / m ⁇ 2 > / 24H or less.
  • the circularly polarizing plate has a small curl due to any of the state change (typically peeling of the surface protective film and / or release liner) and change with time. Can be realized.
  • the minimum of the water vapor transmission rate of a 2nd protective layer is 10 g / m ⁇ 2 > / 24H, for example.
  • the second protective layer is formed of any appropriate film that can be used as a protective layer for the polarizer as long as it can have the above moisture permeability.
  • a typical example of a material for forming the second protective layer is an acrylic resin.
  • a (meth) acrylic resin having a glutarimide structure is used as the acrylic resin.
  • Examples of the (meth) acrylic resin having a glutarimide structure include, for example, JP-A-2006-309033, JP-A-2006-317560, JP-A-2006-328329, JP-A-2006-328334, and JP-A-2006.
  • a (meth) acrylic resin having a lactone ring structure is used as the acrylic resin.
  • (meth) acrylic resins having a lactone ring structure include, for example, JP 2000-230016, JP 2001-151814, JP 2002-120326, JP 2002-254544, and JP 2005. -146084. These descriptions are incorporated herein by reference.
  • the (meth) acrylic resin has a Tg (glass transition temperature) of preferably 115 ° C. or higher, more preferably 120 ° C. or higher, still more preferably 125 ° C. or higher, and particularly preferably 130 ° C. or higher. It is because it can be excellent in durability.
  • Tg glass transition temperature
  • the upper limit of Tg of the said (meth) acrylic-type resin is not specifically limited, From viewpoints of a moldability etc., Preferably it is 170 degrees C or less.
  • the (meth) acrylic resin has a mass average molecular weight (sometimes referred to as a weight average molecular weight) of preferably 1,000 to 2,000,000, more preferably 5,000 to 1,000,000, still more preferably 10,000 to 500,000, and particularly preferably 50,000 to 500,000. It is.
  • the second protective layer 12 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 15 ⁇ m to 25 ⁇ m. With such a thickness, the above moisture permeability can be realized while maintaining desired optical characteristics as a protective layer on the inner side (display cell side) of the polarizer.
  • the retardation layer 30 may have any suitable optical and / or mechanical properties depending on the purpose.
  • the retardation layer 30 typically has a slow axis.
  • the angle ⁇ formed by the slow axis of the retardation layer 30 and the absorption axis of the polarizer 11 is typically 35 ° to 55 °, preferably 38 ° to 52 °, and more preferably. Is between 42 ° and 48 °, more preferably about 45 °. If the angle ⁇ is in such a range, the retardation layer 30 is a ⁇ / 4 plate as will be described later, thereby having very excellent circular polarization characteristics (as a result, very excellent antireflection characteristics). A circularly polarizing plate can be obtained.
  • the retardation layer 30 preferably has a relationship in refractive index characteristics of nx> ny ⁇ nz.
  • the retardation layer is typically provided for imparting antireflection properties to the polarizing plate and can function as a ⁇ / 4 plate.
  • the in-plane retardation Re (550) of the retardation layer is from 80 nm to 200 nm, preferably from 100 nm to 180 nm, and more preferably from 110 nm to 170 nm.
  • the Nz coefficient of the 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. .
  • the retardation layer may exhibit reverse dispersion wavelength characteristics in which the retardation value increases with the wavelength of the measurement light, or may exhibit positive wavelength dispersion characteristics in which the retardation value decreases with the wavelength of the measurement light.
  • the phase difference value may exhibit a flat chromatic dispersion characteristic that hardly changes depending on the wavelength of the measurement light.
  • the retardation layer exhibits reverse dispersion wavelength characteristics.
  • Re (450) / Re (550) of the retardation layer is preferably 0.8 or more and less than 1, and more preferably 0.8 or more and 0.95 or less. With such a configuration, very excellent antireflection characteristics can be realized.
  • the retardation layer exhibits flat chromatic dispersion characteristics.
  • Re (450) / Re (550) of the retardation layer is preferably from 0.99 to 1.03, and Re (650) / Re (550) is preferably from 0.98 to 1.02. is there.
  • the absolute value of photoelastic coefficient of preferably 2 ⁇ 10 -11 m 2 / N or less, more preferably 2.0 ⁇ 10 -13 m 2 /N ⁇ 1.5 ⁇ 10 -11 m 2 / N, more preferably includes a resin of 1.0 ⁇ 10 -12 m 2 /N ⁇ 1.2 ⁇ 10 -11 m 2 / N.
  • the retardation layer has a moisture permeability of 160 g / m at 40 ° C. and a relative humidity of 92% as described above. It is less than 2 / 24H, preferably 120 g / m 2 / 24H or less, more preferably 100 g / m 2 / 24H or less.
  • the moisture permeability is less than 2 / 24H, preferably 120 g / m 2 / 24H or less, more preferably 100 g / m 2 / 24H or less.
  • the circularly polarizing plate has a small curl due to any of the state change (typically peeling of the surface protective film and / or release liner) and change with time. Can be realized.
  • the minimum of the water vapor transmission rate of a phase difference layer is 10 g / m ⁇ 2 > / 24H, for example.
  • the thickness of the retardation layer is preferably 60 ⁇ m or less, and preferably 30 ⁇ m to 58 ⁇ m. With such a thickness, the above moisture permeability can be realized while maintaining desired optical characteristics as a ⁇ / 4 plate imparting a circularly polarizing function.
  • the retardation layer 30 can be composed of any appropriate resin film that can satisfy the above-described characteristics.
  • 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 polycarbonate-based resin can be suitably used, and when it is composed of a resin film exhibiting flat wavelength dispersion characteristics, a cyclic olefin-based resin is suitable. Can be used.
  • the polycarbonate resin any appropriate polycarbonate resin can be used as long as the effects of the present invention can be obtained.
  • the polycarbonate resin includes a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, an alicyclic diol, an alicyclic dimethanol, di, tri, or polyethylene glycol, and an alkylene.
  • the polycarbonate resin is derived from a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, a structural unit derived from an alicyclic dimethanol and / or a di-, tri- or polyethylene glycol. More preferably, a structural unit derived from a fluorene-based dihydroxy compound, a structural unit derived from an isosorbide-based dihydroxy compound, and a structural unit derived from di, tri, or polyethylene glycol.
  • the polycarbonate resin may contain structural units derived from other dihydroxy compounds as necessary. Details of the polycarbonate resin that can be suitably used in the present invention are described in, for example, Japanese Patent Application Laid-Open Nos. 2014-10291 and 2014-26266, and the description is incorporated herein by reference. The
  • a polycarbonate-based resin containing an oligofluorene structural unit can be used.
  • the polycarbonate-based resin containing an oligofluorene structural unit include a resin containing a structural unit represented by the following general formula (1) and / or a structural unit represented by the following general formula (2).
  • R 5 and R 6 are each independently a direct bond, a substituted or unsubstituted alkylene group having 1 to 4 carbon atoms (preferably on the main chain).
  • R 7 is a direct bond, a substituted or unsubstituted alkylene group having 1 to 4 carbon atoms (preferably having 1 to 2 carbon atoms on the main chain).
  • R 8 to R 13 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms (preferably 1 to 4, more preferably 1 to 2), substituted or unsubstituted A substituted aryl group having 4 to 10 carbon atoms (preferably 4 to 8, more preferably 4 to 7), a substituted or unsubstituted carbon group having 1 to 10 carbon atoms (preferably 1 to 4, more preferably 1 to 2) Acyl group, substituted or unsubstituted, 1 to 0 (preferably 1 to 4, more preferably 1 to 2) alkoxy group, substituted or unsubstituted aryloxy group having 1 to 10 carbon atoms (preferably 1 to 4, more preferably 1 to 2), substituted or unsubstituted An unsubstituted acyloxy group having 1 to 10 carbon atoms (preferably 1 to 4, more preferably 1 to 2), a substituted or unsubstituted amino group, and a substituted or unsubstituted carbon
  • the fluorene ring contained in the oligofluorene structural unit has a configuration in which all of R 8 to R 13 are hydrogen atoms, or R 8 and / or R 13 is a halogen atom or an acyl group. , A nitro group, a cyano group, and a sulfo group, and R 9 to R 12 are hydrogen atoms.
  • the glass transition temperature of the polycarbonate resin is preferably 110 ° C. or higher and 150 ° C. or lower, more preferably 120 ° C. or higher and 140 ° C. or lower. If the glass transition temperature is excessively low, the heat resistance tends to deteriorate, there is a possibility of causing a dimensional change after film formation, and the image quality of the resulting organic EL panel may be lowered. If the glass transition temperature is excessively high, the molding stability at the time of film molding may deteriorate, and the transparency of the film may be impaired.
  • the glass transition temperature is determined according to JIS K 7121 (1987).
  • the molecular weight of the polycarbonate resin can be represented by a reduced viscosity.
  • the reduced viscosity is measured using a Ubbelohde viscometer at a temperature of 20.0 ° C. ⁇ 0.1 ° C., using methylene chloride as a solvent, precisely adjusting the polycarbonate concentration to 0.6 g / dL.
  • the lower limit of the reduced viscosity is usually preferably 0.30 dL / g, more preferably 0.35 dL / g or more.
  • the upper limit of the reduced viscosity is usually preferably 1.20 dL / g, more preferably 1.00 dL / g, still more preferably 0.80 dL / g.
  • the reduced viscosity is less than the lower limit, there may be a problem that the mechanical strength of the molded product is reduced.
  • the reduced viscosity is larger than the upper limit, the fluidity at the time of molding is lowered, and there may be a problem that productivity and moldability are lowered.
  • a commercially available film may be used as the polycarbonate resin film.
  • Specific examples of commercially available products include “Pure Ace WR-S”, “Pure Ace WR-W”, “Pure Ace WR-M” manufactured by Teijin Limited, and “NRF” manufactured by Nitto Denko Corporation. It is done.
  • 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.
  • 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 retardation layer 30 is obtained, for example, by stretching a film formed from the resin.
  • Any appropriate forming method can be adopted as a method of forming a film from a 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 polycarbonate-type resin or cyclic olefin-type resin, you may use the said commercial film as it is for a extending
  • the thickness of the resin film can be set to any appropriate value depending on the desired thickness of the 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 retardation film is produced by uniaxially stretching a resin film or uniaxially stretching a fixed end.
  • the fixed end uniaxial stretching there is a method of stretching in the width direction (lateral direction) while running the resin film in the longitudinal direction.
  • the draw ratio is preferably 1.1 to 3.5 times.
  • the retardation film can be produced by continuously stretching a long resin film obliquely in the direction of the angle ⁇ described above with respect to the longitudinal direction.
  • a long stretched film having an orientation angle of ⁇ with respect to the longitudinal direction of the film (slow axis in the direction of angle ⁇ ) can be obtained.
  • the angle ⁇ may be an angle formed by the absorption axis of the polarizer and the slow axis of the retardation layer in the circularly polarizing plate.
  • the angle ⁇ is typically 35 ° to 55 °, preferably 38 ° to 52 °, more preferably 42 ° to 48 °, and further preferably about 45 °.
  • 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 retardation layer having the desired in-plane retardation and having the slow axis in the desired direction (substantially long) Shaped 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 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 + 60 ° C, more preferably Tg-15 ° C to Tg + 55 ° C, and most preferably Tg-10 ° C to Tg + 50 ° C. By extending
  • 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.
  • Conductive layer or isotropic substrate with conductive layer The conductive layer can be formed by any suitable film formation method (for example, vacuum deposition method, sputtering method, CVD method, ion plating method, spray method, etc.).
  • a metal oxide film can be formed thereon.
  • 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. Of these, indium-tin composite oxide (ITO) is preferable.
  • 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 conductive layer may be transferred from the base material to the retardation layer, and the conductive layer alone may be a constituent layer of a circularly polarizing plate, and is laminated on the retardation layer as a laminate (base material with a conductive layer) with the base material. May be.
  • the base material is optically isotropic, and therefore the conductive layer can be used for a circularly polarizing plate as an isotropic base material with a conductive layer.
  • any appropriate isotropic substrate can be adopted.
  • a material constituting the isotropic substrate for example, a material having a main skeleton such as a norbornene resin or an olefin resin as a main skeleton, or a cyclic structure such as a lactone ring or a glutarimide ring is used for an acrylic resin. Examples thereof include materials possessed in the main chain. When such a material is used, when an isotropic substrate is formed, it is possible to suppress the expression of the phase difference accompanying the orientation of the molecular chain.
  • the thickness of the isotropic substrate is preferably 50 ⁇ m or less, more preferably 35 ⁇ m or less.
  • the lower limit of the thickness of the isotropic substrate is, for example, 20 ⁇ m.
  • the conductive layer and / or the conductive layer of the isotropic base material with the conductive layer may be patterned as necessary. By conducting the patterning, a conductive portion and an insulating portion can be formed. As a result, an electrode can be formed.
  • the electrode can function as a touch sensor electrode that senses contact with the touch panel. 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.
  • the circularly polarizing plate described in the items A to F can be applied to a flexible image display device. Therefore, the present invention includes a flexible image display device using such a circularly polarizing plate.
  • a typical example of a flexible image display device is an organic EL display device.
  • the flexible image display apparatus by embodiment of this invention is equipped with the circularly-polarizing plate as described in said A term to F term in the visual recognition side.
  • the circularly polarizing plate is laminated so that the retardation layer is on the display cell (for example, organic EL cell) side (so that the polarizer is on the viewing side).
  • a flexible organic EL display device can be realized, for example, by configuring a substrate of an organic EL cell with a flexible or foldable material.
  • a material typically, thin glass provided with flexibility, a thermoplastic resin or a thermosetting resin film, an alloy, and a metal can be given.
  • the thermoplastic resin or thermosetting resin include polyester resins, polyimide resins, epoxy resins, polyurethane resins, polystyrene resins, polyolefin resins, polyamide resins, polycarbonate resins, silicone resins, fluorine And acrylonitrile-butadiene-styrene copolymer resin.
  • the alloy include stainless steel, 36 alloy, and 42 alloy.
  • the metal include copper, nickel, iron, aluminum, and titanium.
  • 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.
  • Thickness The thickness was measured using a digital micrometer (KC-351C manufactured by Anritsu).
  • Retardation value of retardation layer Refractive index nx, ny and nz of the retardation layer used in the examples and comparative examples were determined using 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.
  • Moisture permeability The film constituting the second protective layer or retardation layer was measured according to JIS Z 0208 (cup method).
  • 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 polarizer 1.
  • a methacrylic resin film having a glutarimide ring structure (thickness: 20 ⁇ m, corresponding to the second protective layer) and a TAC film are hard coated on both sides of the obtained polarizer 1 via a polyvinyl alcohol adhesive.
  • HC-TAC films (thickness: 47 ⁇ m, corresponding to the first protective layer) each having a hard coat (HC) layer formed by the treatment were bonded together, and the first protective layer / polarizer 1 / second
  • the polarizing plate 1 which has the structure of a protective layer was obtained.
  • the methacrylic resin film which has a glutarimide ring structure was produced as follows.
  • the methacrylic resin pellets having a glutarimide ring structure were dried at 100.5 kPa and 100 ° C. for 12 hours, and extruded from a T-die at a die temperature of 270 ° C. with a single screw extruder to form a film.
  • the obtained film is stretched in the transport direction (MD) in an atmosphere 10 ° C. higher than the glass transition temperature Tg of the resin, and then the glass transition of the resin in the direction (TD) orthogonal to the transport direction.
  • the film was stretched in an atmosphere 7 ° C. higher than the temperature Tg.
  • the resulting film was substantially optically isotropic.
  • HC-PC film (thickness: 25 ⁇ m, having a hard coat (HC) layer formed on one side of the polycarbonate resin film on one side of the obtained polarizer 2 via a polyvinyl alcohol adhesive by a hard coat treatment.
  • the polarizing plate 2 having the configuration of the first protective layer / polarizer 2 was obtained.
  • the pressure in the reaction vessel was changed from normal pressure to 13.3 kPa, and the generated phenol was extracted out of the reaction vessel while the temperature of the heat medium in the reaction vessel was increased to 190 ° C. over 1 hour.
  • the pressure in the reaction vessel is set to 6.67 kPa, and the heat medium temperature of the reaction vessel is increased to 230 ° C. in 15 minutes.
  • the generated phenol was extracted out of the reaction vessel. Since the stirring torque of the stirrer increased, the temperature was raised to 250 ° C. in 8 minutes, and the pressure in the reaction vessel was reduced to 0.200 kPa or less in order to remove the generated phenol.
  • the obtained polycarbonate resin had a glass transition temperature of 136.6 ° C. and a reduced viscosity of 0.395 dL / g.
  • the obtained polycarbonate resin was vacuum-dried at 80 ° C. for 5 hours, and then a single-screw extruder (made by Isuzu Chemical Industries, screw diameter 25 mm, cylinder set temperature: 220 ° C.), T-die (width 200 mm, set temperature: 220). ° C.), a chill roll (set temperature: 120 to 130 ° C.), and a film forming apparatus equipped with a winder, a 120 ⁇ m thick polycarbonate resin film was produced.
  • Retardation Film Using a tenter stretching machine, the obtained polycarbonate resin film was horizontally stretched to obtain a retardation film having a thickness of 50 ⁇ m. At that time, the draw ratio was 250%, and the draw temperature was 137 to 139 ° C. Re (550) of the obtained retardation film is 137 to 147 nm, Re (450) / Re (550) is 0.89, Nz coefficient is 1.21, orientation angle (slow axis) Direction) was 90 ° with respect to the longitudinal direction. This retardation film was used as the retardation layer 1.
  • Re (550) of the obtained retardation film is 147 nm
  • Re (450) / Re (550) is 0.89
  • Nz coefficient is 1.21
  • orientation angle (direction of slow axis) was 90 ° with respect to the longitudinal direction. This retardation film was used as the retardation layer 2.
  • Re (550) of the obtained retardation film is 141 nm, Re (450) / Re (550) is 0.83, Nz coefficient is 1.1, and photoelastic coefficient is 16 ⁇ 10 ⁇ 12.
  • the orientation angle (the direction of the slow axis) was 45 ° with respect to the longitudinal direction. This retardation film was used as the retardation layer 3.
  • Example 1 The second protective layer surface of the polarizing plate 1 and the retardation layer 1 are bonded via an acrylic pressure-sensitive adhesive so that the angle formed by the absorption axis of the polarizer and the slow axis of the retardation layer is 45 °.
  • a circularly polarizing plate 1 was obtained.
  • An acrylic pressure-sensitive adhesive layer (thickness 15 ⁇ m) was provided on the phase difference layer surface of the obtained circularly polarizing plate 1, and a release liner was temporarily attached to the surface of the pressure-sensitive adhesive layer.
  • a surface protective film was temporarily attached to the first protective layer surface.
  • the protective film used was a 38 ⁇ m thick PET film coated with a 10 ⁇ m thick adhesive.
  • the moisture permeability of the second protective layer at 40 ° C. and a relative humidity of 92% was 150 g / m 2 / 24H.
  • the obtained circularly polarizing plate 1 was subjected to the curl amount evaluation described in (4) above. The results are shown in Table 1. Furthermore, the organic EL cell was taken out from a flexible organic EL display device (product name “Galaxy S6 Edge” manufactured by Samsung). On the other hand, the release liner was peeled from the circularly polarizing plate 1, and the circularly polarizing plate 1 was bonded to the organic EL cell via an adhesive layer. Furthermore, the surface protective film was peeled from the circularly polarizing plate bonded to the organic EL cell. The organic EL cell on which the circularly polarizing plate 1 was bonded was allowed to stand for 72 hours at 23 ° C. and 55% RH, and then visually observed for warpage. As a result, neither warping nor bending was observed.
  • Example 2 The polarizer surface of the polarizing plate 2 and the retardation layer 2 are bonded through a PVA adhesive so that the angle formed by the absorption axis of the polarizer and the slow axis of the retardation layer is 45 °.
  • a circularly polarizing plate 2 was obtained.
  • An acrylic pressure-sensitive adhesive layer (thickness 15 ⁇ m) was provided on the phase difference layer surface of the obtained circularly polarizing plate 2, and a release liner was temporarily attached to the surface of the pressure-sensitive adhesive layer. Furthermore, a surface protective film was temporarily attached to the first protective layer surface.
  • the water permeability of the retardation layer at 40 ° C. and a relative humidity of 92% was 70 g / m 2 / 24H.
  • the obtained circularly polarizing plate 2 was subjected to the curl amount evaluation of (4) above. The results are shown in Table 1. Further, the obtained circularly polarizing plate 2 was bonded to an organic EL cell in the same manner as in Example 1, and subjected to the same evaluation as in Example 1. As a result, neither warping nor bending was observed.
  • Example 3 The polarizer surface of the polarizing plate 5 and the retardation layer 3 are bonded together via a PVA adhesive so that the angle between the absorption axis of the polarizer and the slow axis of the retardation layer is 45 °.
  • a circularly polarizing plate 5 was obtained.
  • An acrylic pressure-sensitive adhesive layer (thickness 20 ⁇ m) was provided on the phase difference layer surface of the obtained circularly polarizing plate 5, and a release liner was temporarily attached to the surface of the pressure-sensitive adhesive layer. Furthermore, a surface protective film was temporarily attached to the first protective layer surface.
  • the water vapor permeability of the retardation layer at 40 ° C. and a relative humidity of 92% was 80 g / m 2 / 24H.
  • the obtained circularly polarizing plate 5 was subjected to the evaluation of the curl amount of (4) above. The results are shown in Table 1. Further, the obtained circularly polarizing plate 5 was bonded to an organic EL cell in the same manner as in Example 1, and subjected to the same evaluation as in Example 1. As a result, neither warping nor bending was observed.
  • the obtained circularly polarizing plate 3 was subjected to the curl amount evaluation of (4) above. The results are shown in Table 1. Further, the obtained circularly polarizing plate 3 was bonded to an organic EL cell in the same manner as in Example 1, and subjected to the same evaluation as in Example 1. As a result, warpage was recognized.
  • the obtained circularly polarizing plate 4 was subjected to the evaluation of the curl amount of (4) above. The results are shown in Table 1. Further, the obtained circularly polarizing plate 4 was bonded to an organic EL cell in the same manner as in Example 1, and subjected to the same evaluation as in Example 1. As a result, warpage was recognized.
  • the circularly polarizing plate of the present invention is suitably used for a flexible image display device (for example, an organic EL display device).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Polarising Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne une plaque de polarisation circulaire qui présente une faible tendance à s'enrouler suite à des changements d'état ou à des modifications au fil du temps et qui, lorsqu'elle est utilisée dans un dispositif d'affichage d'image flexible, peut supprimer une courbure et un gauchissement indésirables dans le dispositif d'affichage d'image. La plaque de polarisation circulaire d'après la présente invention comprend, dans l'ordre suivant, une première couche de protection, un polariseur, une seconde couche de protection et une couche de retard présentant un retard dans le plan Re (550) de 80 à 200 nm. La perméabilité à l'humidité de la seconde couche de protection à 40 °C et 92 % d'humidité relative est inférieure à 160 g/m2/24H. Une telle plaque de polarisation circulaire peut être utilisée dans un dispositif d'affichage d'image flexible.
PCT/JP2016/085470 2015-12-10 2016-11-30 Plaque de polarisation circulaire et dispositif d'affichage d'image flexible l'utilisant WO2017098970A1 (fr)

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CN201680071187.1A CN108292005A (zh) 2015-12-10 2016-11-30 圆偏振片及使用了其的柔性图像显示装置
KR1020187016410A KR102563679B1 (ko) 2015-12-10 2016-11-30 원편광판 및 이를 이용한 플렉시블한 화상 표시 장치
SG11201804822YA SG11201804822YA (en) 2015-12-10 2016-11-30 Circular polarizing plate and flexible image display device using same

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110531455A (zh) * 2018-05-23 2019-12-03 日东电工株式会社 带表面保护膜的偏振片
JP2020034790A (ja) * 2018-08-30 2020-03-05 住友ベークライト株式会社 透光性樹脂シート、投射型表示器および移動体
WO2020196146A1 (fr) * 2019-03-27 2020-10-01 日東電工株式会社 Lame polarisante ayant une couche de retard
WO2021172089A1 (fr) * 2020-02-28 2021-09-02 日東電工株式会社 Procédé d'inspection de stratifié optiquement transmissif
WO2023095789A1 (fr) * 2021-11-25 2023-06-01 日東電工株式会社 Film optique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006317560A (ja) * 2005-05-10 2006-11-24 Kaneka Corp 偏光子保護フィルムならびにそれを用いた偏光板
JP2008536178A (ja) * 2005-04-08 2008-09-04 イーストマン コダック カンパニー 偏光子板の形成方法
JP2010277063A (ja) * 2009-04-27 2010-12-09 Sumitomo Chemical Co Ltd 液晶表示装置
JP2011018015A (ja) * 2009-07-10 2011-01-27 Suregiant Technology Co Ltd 偏光板保護膜製造装置及びその偏光板保護膜
JP2014010291A (ja) * 2012-06-29 2014-01-20 Nitto Denko Corp 円偏光板および表示装置
JP2014026266A (ja) * 2012-06-21 2014-02-06 Nitto Denko Corp 偏光板および有機ｅｌパネル
JP2014119502A (ja) * 2012-12-13 2014-06-30 Nitto Denko Corp 偏光板の製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008536178A (ja) * 2005-04-08 2008-09-04 イーストマン コダック カンパニー 偏光子板の形成方法
JP2006317560A (ja) * 2005-05-10 2006-11-24 Kaneka Corp 偏光子保護フィルムならびにそれを用いた偏光板
JP2010277063A (ja) * 2009-04-27 2010-12-09 Sumitomo Chemical Co Ltd 液晶表示装置
JP2011018015A (ja) * 2009-07-10 2011-01-27 Suregiant Technology Co Ltd 偏光板保護膜製造装置及びその偏光板保護膜
JP2014026266A (ja) * 2012-06-21 2014-02-06 Nitto Denko Corp 偏光板および有機ｅｌパネル
JP2014010291A (ja) * 2012-06-29 2014-01-20 Nitto Denko Corp 円偏光板および表示装置
JP2014119502A (ja) * 2012-12-13 2014-06-30 Nitto Denko Corp 偏光板の製造方法

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110531455A (zh) * 2018-05-23 2019-12-03 日东电工株式会社 带表面保护膜的偏振片
CN110531455B (zh) * 2018-05-23 2023-03-14 日东电工株式会社 带表面保护膜的偏振片
JP2020034790A (ja) * 2018-08-30 2020-03-05 住友ベークライト株式会社 透光性樹脂シート、投射型表示器および移動体
WO2020196146A1 (fr) * 2019-03-27 2020-10-01 日東電工株式会社 Lame polarisante ayant une couche de retard
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
JPWO2020196146A1 (ja) * 2019-03-27 2021-12-09 日東電工株式会社 位相差層付偏光板
WO2021172089A1 (fr) * 2020-02-28 2021-09-02 日東電工株式会社 Procédé d'inspection de stratifié optiquement transmissif
JP2023053294A (ja) * 2020-02-28 2023-04-12 日東電工株式会社 光透過性積層体
JP7498815B2 (ja) 2020-02-28 2024-06-12 日東電工株式会社 光透過性積層体
WO2023095789A1 (fr) * 2021-11-25 2023-06-01 日東電工株式会社 Film optique

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