WO2012141534A2 - Pellicule optique - Google Patents

Pellicule optique Download PDF

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Publication number
WO2012141534A2
WO2012141534A2 PCT/KR2012/002829 KR2012002829W WO2012141534A2 WO 2012141534 A2 WO2012141534 A2 WO 2012141534A2 KR 2012002829 W KR2012002829 W KR 2012002829W WO 2012141534 A2 WO2012141534 A2 WO 2012141534A2
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Prior art keywords
degrees
liquid crystal
film
optical film
group
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PCT/KR2012/002829
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English (en)
Korean (ko)
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WO2012141534A3 (fr
Inventor
윤혁
전병건
박문수
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주식회사 엘지화학
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Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to JP2014505082A priority Critical patent/JP2014513325A/ja
Priority to CN201280018479.0A priority patent/CN103477255B/zh
Priority claimed from KR1020120038465A external-priority patent/KR101576324B1/ko
Priority to US13/584,544 priority patent/US9201183B2/en
Publication of WO2012141534A2 publication Critical patent/WO2012141534A2/fr
Publication of WO2012141534A3 publication Critical patent/WO2012141534A3/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
    • G02B5/3083—Birefringent or phase retarding 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • 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 application relates to an optical film, a circular polarizing plate, and a display device.
  • Retardation films can be used for various applications.
  • the retardation film may be disposed on one side or both sides of the liquid crystal cell in order to improve the viewing angle characteristics of the liquid crystal display (LCD).
  • the retardation film is also used for antireflection and securing visibility in a reflective LCD, OLED (Organic Light Emitting Device) or the like (Japanese Patent Laid-Open No. 1996-321381).
  • the retardation film includes 1/2 wavelength or 1/4 wavelength retardation film or the like depending on the phase retardation characteristic.
  • the conventional 1/2 or 1/4 wavelength retardation film has a problem that the phase difference is changed for each wavelength, and thus the range of the wavelength acting as the 1/2 or 1/4 wavelength retardation film is limited to only a partial range.
  • a film that functions as a quarter-wave retardation film for light at a wavelength of 550 nm often does not function as a quarter-wave retardation film for light at a wavelength of 450 nm or 650 nm.
  • the present application provides an optical film, a circular polarizer and a display device.
  • An exemplary optical film may include an optically anisotropic polymer layer and a liquid crystal layer present on the polymer layer.
  • the polymer layer and the liquid crystal layer may be disposed such that the optical axis of the polymer layer and the optical axis of the liquid crystal layer are perpendicular to each other or about 61.5 degrees.
  • optical axis means a slow axis or a fast axis, and may mean a slow axis unless otherwise specified.
  • vertical, orthogonal, horizontal or parallel herein means substantially vertical, orthogonal, horizontal or parallel in a range which does not impair the desired effect.
  • each term may include, for example, an error within ⁇ 15, within ⁇ 10, within ⁇ 5, or within ⁇ 3.
  • the angle 61.5 degrees means a substantial 61.5 degrees within a range that does not impair the desired effect, and thus the angle is, for example, within ⁇ 15, ⁇ 10, ⁇ 5 or ⁇ It can include an error within three.
  • FIG. 1 is a cross-sectional view of an exemplary optical film 100 and shows a case including a polymer layer 101 and a liquid crystal layer 102.
  • the optical film 200 may further include an alignment layer 201 existing between the polymer layer 101 and the liquid crystal layer 102 as shown in FIG. 2.
  • an example of the optical film may include a film having a quarter wavelength phase retardation property.
  • the term "n-wavelength phase retardation characteristic" may mean a characteristic capable of retarding incident light by n times the wavelength of the incident light within at least a portion of the wavelength range.
  • the optical film may have a phase retardation of 110 nm to 220 nm or 140 nm to 170 nm with respect to light having a wavelength of 550 nm.
  • the term "plane film phase difference of an optical film, a polymer layer, or a liquid crystal layer” is a numerical value calculated by "(nx-ny) xd", and nx is a planar ground of an optical film, a polymer layer, or a liquid crystal layer. It is the refractive index of an axial direction, ny is the refractive index of the planar fast-axis direction of an optical film, a polymer layer, or a liquid crystal layer, and d is the thickness of an optical film, a polymer layer, or a liquid crystal layer.
  • the optical film may, for example, have reverse wavelength dispersion.
  • the optical film may be a film in which R (650) / R (550) has a larger value than R (450) / R (550).
  • R (X) may mean a planar phase difference of an optical film, a polymer layer, or a liquid crystal layer with respect to light having a wavelength of "X" nm.
  • the optical film has R (450) / R (550) of 0.81 to 0.99, 0.82 to 0.98, 0.83 to 0.97, 0.84 to 0.96, 0.85 to 0.95, 0.86 to 0.94, 0.87 to 0.93, 0.88 to 0.92 Or 0.89 to 0.91, and R (650) / R (550) is 1.01 to 1.19, 1.02 to 1.18, 1.03 to 1.17, 1.04 to 1.16, 1.05 to 1.15, 1.06 to 1.14, 1.07 to 1.13, 1.08 to 1.12 or 1.09 to 1.11.
  • the polymer layer included in the optical film may be, for example, having a half wavelength phase retardation characteristic.
  • the polymer layer may have a phase retardation of 200 nm to 290 nm or 220 nm to 270 nm with respect to light having a wavelength of 550 nm.
  • the polymer layer may have an absolute value of a difference between R (450) / R (550) and R (650) / R (550) within 5, 4, 3, 2, 1, or substantially zero.
  • the polymer layer, R (450) / R (550) is 0.95 to 1.05 or 0.99 to 1.01
  • R (650) / R (550) may be 0.95 to 1.05 or 0.99 to 1.01.
  • the polymer layer may be, for example, a polymer film.
  • stretching in a suitable way can be used for the said polymer layer.
  • an unstretched polymer film can also be used for the said polymer layer.
  • a light transmittance of 70% or more, 80% or more or 85% or more, and a film manufactured by an absorbent cast method may be used.
  • a film having a thickness of 3 mm or less, 1 ⁇ m to 1 mm or 5 ⁇ m to 500 ⁇ m may be used in consideration of the possibility of producing a homogeneous stretched film.
  • a polyolefin film such as a polyethylene film or a polypropylene film
  • a cyclic olefin polymer (COP: Cycloolefin polymer) film such as a polynorbornene film, a polyvinyl chloride film, a polyacrylonitrile film, poly Cellulose ester-based polymer films such as sulfone films, polyacrylate films, polyvinyl alcohol films, or triacetyl cellulose (TAC) films, or copolymer films of two or more monomers among the monomers forming the polymers.
  • a cyclic olefin polymer film may be used as the polymer film.
  • cyclic olefin polymer examples include ring-opening polymers of cyclic olefins such as norbornene or hydrogenated products thereof, addition polymers of cyclic olefins, copolymers of other comonomers such as cyclic olefins and alpha-olefins, or the polymers Or a graft polymer in which a copolymer is modified with an unsaturated carboxylic acid or a derivative thereof, and the like, but is not limited thereto.
  • the polymer layer may be formed in a direction parallel to the longitudinal direction (MD) or the transverse direction (TD) or may be a polymer layer having an optical axis formed to have a predetermined angle with the longitudinal or transverse direction.
  • the optical axis of the polymer layer may form 45 degrees or 67.5 degrees with the longitudinal or transverse direction of the polymer layer, or may be formed to form any one angle within the range of 45 degrees to 67.5 degrees.
  • the angle, such as 45 degrees or 67.5 degrees means a substantial 45 degrees or 67.5 degrees in a range that does not impair the desired effect, for example, within ⁇ 10, ⁇ 5 or ⁇ 3 errors It may include.
  • the optical axis of the polymer layer may be controlled by adjusting the stretching axis in the process of stretching the film, for example, if the polymer layer is a stretched polymer film.
  • the polymer layer may have a thickness of about 1 mm or less, about 1 ⁇ m to 500 ⁇ m, or about 5 ⁇ m to 300 ⁇ m, but this may be changed according to the purpose.
  • the liquid crystal layer of the optical film may have a quarter wavelength phase delay characteristic, for example.
  • the liquid crystal layer may have a phase retardation of 95 nm to 145 nm or 105 nm to 120 nm with respect to light having a wavelength of 550 nm.
  • the liquid crystal layer may be a liquid crystal layer in which R (450) / R (550) has a larger value than R (650) / R (550).
  • R (450) / R (550) of the liquid crystal layer is 1.01 to 1.19, 1.02 to 1.18, 1.03 to 1.17, 1.04 to 1.16, 1.05 to 1.15, 1.06 to 1.14, 1.07 to 1.13 or 1.08 to 1.12
  • R (650) / R (550) may be between 0.81 and 0.99, 0.82 and 0.98, 0.83 and 0.97, 0.84 and 0.96, 0.85 and 0.95 or 0.86 and 0.94.
  • the liquid crystal layer may include, for example, a polymerizable liquid crystal compound.
  • the liquid crystal layer may include a polymerizable liquid crystal compound in a polymerized form.
  • the term "polymerizable liquid crystal compound” may mean a compound containing a site capable of exhibiting liquid crystallinity, for example, a mesogen skeleton, and the like, and further including at least one polymerizable functional group.
  • the polymerizable liquid crystal compound is included in a polymerized form may mean a state in which the liquid crystal compound is polymerized to form a skeleton such as a main chain or side chain of the liquid crystal polymer in the liquid crystal layer.
  • the liquid crystal layer may further include a polymerizable liquid crystal compound in a non-polymerized state, or may further include a known additive such as a polymerizable non-liquid crystal compound, a stabilizer, a non-polymerizable non-liquid crystal compound, or an initiator.
  • the polymerizable liquid crystal compound included in the liquid crystal layer may include a polyfunctional polymerizable liquid crystal compound and a monofunctional polymerizable liquid crystal compound.
  • polyfunctional polymerizable liquid crystal compound may mean a compound containing two or more polymerizable functional groups in the liquid crystal compound.
  • the multifunctional polymerizable liquid crystal compound has 2 to 10, 2 to 8, 2 to 6, 2 to 5, 2 to 4, 2 to 3 polymerizable functional groups Or two.
  • the term "monofunctional polymerizable liquid crystal compound” can mean a compound having one polymerizable functional group in the liquid crystal compound.
  • phase retardation characteristics of the liquid crystal layer can be effectively controlled, and the phase retardation characteristics implemented, for example, the optical axis of the phase retardation layer and the phase retardation value can be stably maintained. Can be.
  • the liquid crystal layer is a monofunctional polymerizable liquid crystal compound, more than 0 parts by weight to 100 parts by weight, 1 part by weight to 90 parts by weight, 1 part by weight to 80 parts by weight, 1 part by weight relative to 100 parts by weight of the polyfunctional polymerizable liquid crystal compound.
  • To 70 parts by weight 1 to 60 parts by weight, 1 to 50 parts by weight, 1 to 30 parts by weight or 1 to 20 parts by weight.
  • the unit "parts by weight” may mean a ratio of weight.
  • the multifunctional or monofunctional polymerizable liquid crystal compound may be a compound represented by the following Chemical Formula 1.
  • A is a single bond, -COO- or -OCO-
  • R 1 to R 10 are each independently hydrogen, halogen, alkyl group, alkoxy group, alkoxycarbonyl group, cyano group, nitro group, -OQP or Or a pair of two adjacent substituents of R 1 to R 5 or a pair of two adjacent substituents of R 6 to R 10 are connected to each other to form a benzene substituted with -OQP, wherein R 1 At least one of R 10 to -OQP or a substituent of Formula 2 below, at least one pair of two adjacent substituents of R 1 to R 5 or two adjacent substituents of R 6 to R 10 are connected to each other- Form a benzene substituted with OQP, wherein Q is an alkylene group or an alkylidene group, and P is an alkenyl group, epoxy group, cyano group, carboxyl group, acryloyl group, methacryloyl group,
  • B is a single bond, -COO- or -OCO-
  • R 11 to R 15 are each independently hydrogen, halogen, alkyl group, alkoxy group, alkoxycarbonyl group, cyano group, nitro group or -OQP
  • a pair of adjacent two substituents of R 11 to R 15 are connected to each other to form a benzene substituted with -OQP
  • at least one of R 11 to R 15 is -OQP
  • two adjacent R 11 to R 15 Pairs of substituents are connected to each other to form a benzene substituted with -OQP
  • Q is an alkylene group or an alkylidene group
  • P is an alkenyl group, epoxy group, cyano group, carboxyl group, acryloyl group, methacryl It is a polymerizable functional group, such as a loyl group, acryloyloxy group, or methacryloyloxy group.
  • two adjacent substituents may be linked to each other to form a benzene substituted with -OQP, which may mean that two adjacent substituents are linked to each other to form a naphthalene skeleton substituted with -OQP. have.
  • single bond means a case where no separate atom is present in a portion represented by A or B.
  • A is a single bond in Formula 1
  • benzene on both sides of A may be directly connected to form a biphenyl structure.
  • halogen in Chemical Formulas 1 and 2 for example, chlorine, bromine or iodine may be exemplified.
  • alkyl group includes, for example, a straight or branched chain alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms. It may mean, or may mean, for example, a cycloalkyl group having 3 to 20 carbon atoms, 3 to 16 carbon atoms, or 4 to 12 carbon atoms.
  • the alkyl group may be optionally substituted by one or more substituents.
  • alkoxy group may mean, for example, an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms. Can be.
  • the alkoxy group may be linear, branched or cyclic. In addition, the alkoxy group may be optionally substituted by one or more substituents.
  • alkylene group or "alkylidene group” is, for example, unless otherwise specified, for example, an alkylene group or an alkylidene group having 1 to 12 carbon atoms, 4 to 10 carbon atoms or 6 to 9 carbon atoms. Can mean.
  • the alkylene group or alkylidene group may be, for example, linear, branched or cyclic.
  • the alkylene group or alkylidene group may be optionally substituted by one or more substituents.
  • an "alkenyl group” is an alkenyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified. Can mean.
  • the alkenyl group may be, for example, linear, branched or cyclic.
  • the alkenyl group may be optionally substituted by one or more substituents.
  • P may be, for example, acryloyl group, methacryloyl group, acryloyloxy group or methacryloyloxy group, may be acryloyloxy group or methacryloyloxy group, In another example, it may be an acryloyloxy group.
  • an alkyl group, an alkoxy group, an alkenyl group, an epoxy group, an oxo group, an oxetanyl group, a thiol group, a cyano group, a carboxyl group, acryloyl group, a methacryloyl group, Acryloyloxy group, methacryloyloxy group or an aryl group may be exemplified, but is not limited thereto.
  • At least one of -OQP or a residue of Formula 2, which may be present in Formulas 1 and 2, may be, for example, present at a position of R 3 , R 8, or R 13 .
  • the substituents connected to each other to constitute benzene substituted with -OQP may be, for example, R 3 and R 4 or R 12 and R 13 .
  • substituents other than -OQP or residues of the formula (2) or substituents other than the substituents connected to each other to form benzene in the compound of the formula (1) or the formula (2) for example, hydrogen, halogen, straight chain of 1 to 4 carbon atoms Or an alkoxycarbonyl group including a branched alkyl group, a straight or branched alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 4 to 12 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cyano group or a nitro group, and in another example Alkoxycarbonyl group or cyano group including chlorine, a linear or branched alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 4 to 12 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a straight or branched chain alkoxy group having 1 to 4 carbon atoms Can be.
  • the polymerizable liquid crystal compound may be included in the liquid crystal layer in a horizontally aligned state.
  • the compound may be polymerized in a horizontal alignment state and included in the liquid crystal layer.
  • horizontal alignment means that the optical axis of the liquid crystal layer containing the liquid crystal compound is about 0 degrees to about 25 degrees, about 0 degrees to about 15 degrees, about 0 degrees to about 10 degrees, with respect to the plane of the liquid crystal layer, It may mean a case having an inclination angle of about 0 degrees to about 5 degrees or about 0 degrees.
  • the liquid crystal layer may have a difference between a refractive index in the planar slow axis direction and a refractive index in the planar fast axis direction in a range of 0.05 to 0.2, 0.07 to 0.2, 0.09 to 0.2, or 0.1 to 0.2.
  • the refractive index in the plane slow axis direction means the refractive index in the direction showing the highest refractive index in the plane of the liquid crystal layer
  • the refractive index in the fast axis direction means the refractive index in the direction showing the lowest refractive index on the plane of the liquid crystal layer.
  • the fast axis and the slow axis are formed in a direction perpendicular to each other.
  • Each of the refractive indices may be a refractive index measured for light having a wavelength of 550 nm or 589 nm.
  • the difference in refractive index can be measured according to the manufacturer's manual, for example, using Axoscan, Axoscan.
  • the liquid crystal layer may also have a thickness of about 0.5 ⁇ m to 2.0 ⁇ m or about 0.5 ⁇ m to 1.5 ⁇ m.
  • the liquid crystal layer having the relationship and thickness of the refractive index may implement a phase delay characteristic suitable for the application to be applied.
  • the exemplary optical film 200 may further include an alignment layer 201 between the polymer layer 101 and the liquid crystal layer 102.
  • the alignment layer may be a layer which serves to adjust the optical axis of the liquid crystal layer by orienting the liquid crystal compound in the process of forming the optical film.
  • a conventional alignment layer known in the art for example, an alignment layer, a photo alignment layer, a rubbing alignment layer, or the like formed by an imprinting method, may be used.
  • the alignment layer may have an arbitrary configuration, and in some cases, the alignment may be imparted without the alignment layer by directly rubbing or stretching the polymer layer.
  • An exemplary manufacturing method may include, for example, forming a liquid crystal layer on the optically anisotropic polymer layer to have an optical axis perpendicular to the optical axis of the polymer layer or about 61.5 degrees.
  • the details of the polymer layer and the liquid crystal layer may be the same as described above.
  • liquid crystal layer for example, an alignment layer is formed on the polymer layer, and the liquid crystal composition is oriented after forming an application layer of the liquid crystal composition containing the polymerizable liquid crystal compound described above on the alignment layer. It can be prepared by the method of polymerization.
  • the alignment layer may be, for example, a method of forming a polymer film such as polyimide in a polymer layer, rubbing treatment, coating a photo-alignment compound, or performing alignment treatment through irradiation of linearly polarized light, or a nano imprinting method. It can be formed by a printing method.
  • an alignment layer is formed in consideration of a desired alignment direction, for example, an alignment direction for forming a liquid crystal layer having an optical axis in a direction perpendicular to the optical axis of the polymer layer or about 61.5 degrees as described. Various ways of doing this are known.
  • the coating layer of the liquid crystal composition may be formed, for example, by coating the composition on the alignment layer of the polymer layer in a known manner.
  • the liquid crystal layer may be formed by aligning according to the alignment pattern of the alignment layer existing under the coating layer, followed by polymerization.
  • the manufacturing method may be performed by forming a liquid crystal layer on the polymer layer while transferring the optically anisotropic polymer layer in one direction.
  • the transport direction of the optically anisotropic polymer layer may be such that the optical axis of the polymer layer forms 45 degrees or 67.5 degrees with the transport direction, or any angle within the range of 45 degrees to 67.5 degrees.
  • the transport direction M of the polymer layer 101 forms an angle of 1 with the optical axis OP of the polymer layer 101.
  • the ⁇ 1 may be 45 degrees or 67.5 degrees, or any angle within the range of 45 degrees to 67.5 degrees.
  • the liquid crystal layer While transferring the polymer layer 101 in the transport direction M, the liquid crystal layer is perpendicular to the optical axis OP of the polymer layer 101 and the optical axis OL of the liquid crystal layer, or about 61.5 degrees. To form.
  • the liquid crystal layer can be formed in the manner described above.
  • the optical film can be produced more efficiently.
  • the above method can enable efficient continuous production of the optical film when it is associated with the integration process with the linear polarizer described later.
  • An exemplary circular polarizer may include a linear polarizer and the optical film.
  • the optical film may be attached to one surface of the linear polarizer.
  • the light absorption axis of the linear polarizer may form 45 degrees or 67.5 degrees with the optical axis of the polymer layer of the optical film, or may form any angle within 45 degrees to 67.5 degrees.
  • the optical axis of the polymer layer of the optical film and the light absorption axis of the linear polarizer may be about 45 degrees or 67.5 degrees.
  • the optical axis of the polymer layer and the optical axis of the liquid crystal layer may be substantially perpendicular to each other, and the optical axis of the polymer layer and the linear polarizer
  • the optical axis of the polymer layer and the optical axis of the liquid crystal layer may be about 61.5 degrees.
  • FIG. 4 is a diagram illustrating an exemplary circular polarizer 400, and the optical film 402 is attached to the linear polarizer 401.
  • the optical film 402 is included in the circular polarizer 400 such that the polymer layer 101 is located closer to the linear polarizer 401 than the liquid crystal layer 102. It may be.
  • the linear polarizer is a functional element that can extract light oscillating in one direction from incident light oscillating in various directions.
  • a conventional linear polarizer such as poly (vinyl alcohol) linear polarizer can be used.
  • the linear polarizer may be a polyvinyl alcohol film or sheet to which dichroic dyes or iodine are adsorbed and oriented.
  • the polyvinyl alcohol can be obtained, for example, by gelling polyvinylacetate.
  • polyvinyl acetate Homopolymer of vinyl acetate; And copolymers of vinyl acetate and other monomers, and the like.
  • the gelation degree of polyvinylacetate is generally about 85 mol% to about 100 mol% or 98 mol% to 100 mol%.
  • the degree of polymerization of the polyvinyl alcohol used in the linear polarizer may generally be about 1,000 to about 10,000 or about 1,500 to about 5,000.
  • the linear polarizer and the liquid crystal layer may be attached to each other by an adhesive layer.
  • 5 exemplarily shows a circularly polarizing plate 500 having an optical film 402 attached to the linear polarizer 401 by an adhesive layer 501.
  • the adhesive layer may have a glass transition temperature of 36 ° C, 37 ° C, 38 ° C, 39 ° C, 40 ° C, 50 ° C, 60 ° C, 70 ° C, 80 ° C, or 90, for example. It may be at least °C.
  • the upper limit of the glass transition temperature of the adhesive layer is not particularly limited, but may be, for example, about 200 ° C, about 150 ° C, or about 120 ° C.
  • the adhesive layer can also be up to 6 ⁇ m, up to 5 ⁇ m, or up to 4 ⁇ m. At such a thickness, the durability of the optical film can be properly maintained.
  • the lower limit of the thickness of the adhesive layer may be, for example, 0.1 ⁇ m, 0.3 ⁇ m or 0.5 ⁇ m.
  • the adhesive layer may be an active energy ray curable adhesive layer. That is, the adhesive layer may include an adhesive composition cured by irradiation of active energy rays.
  • curing adhesive composition may refer to a process of inducing physical or chemical action or reaction of components included in the composition to express adhesiveness.
  • an "active energy ray hardening type" can mean the adhesive agent or adhesive composition of the type in which the said hardening is guide
  • active energy rays microwaves, infrared rays (IR), ultraviolet rays (UV), X-rays and gamma rays, as well as alpha-particle beams, proton beams, Particle beams such as neutron beams or electron beams can be included, and typically ultraviolet or electron beams can be used.
  • An adhesive bond layer can contain a radically polymerizable compound or a cationically polymerizable compound.
  • the radical or cationically polymerizable compound may be included in the adhesive layer in a polymerized form.
  • the radically polymerizable compound may mean a compound which is polymerized by a radical reaction, for example, a radical reaction by irradiation of an active energy ray, to form an adhesive
  • the cationically polymerizable compound is a cationic reaction, for example.
  • it may mean a compound that is polymerized by a cationic reaction by irradiation of active energy rays to form an adhesive.
  • Each compound may be included in an adhesive composition to form an adhesive through a curing reaction of the composition.
  • the adhesive composition may include only one kind of the radical polymerizable compound or the cationically polymerizable compound, or may include both kinds.
  • Examples of the cationically polymerizable compound include an epoxy compound, a vinyl ether compound, an oxetane compound, an oxolane compound, a cyclic acetal compound, a cyclic lactone compound, a thiirane compound, a thiovinyl ether compound, and a spirosoo ester ( spirortho ester) compounds, ethylenically unsaturated compounds, cyclic ether compounds or cyclic thioether compounds and the like can be exemplified, for example epoxy compounds can be used.
  • an epoxy resin an alicyclic epoxy compound, an aliphatic epoxy compound, an aromatic epoxy compound, etc. can be illustrated, for example.
  • the epoxy resin may have a weight average molecular weight (M w ) in the range of 1000 to 5000 or 2000 to 4000.
  • M w weight average molecular weight
  • the weight average molecular weight means a conversion value with respect to standard polystyrene measured by GPC (Gel Permeation Chromatograph), and unless otherwise specified, the term "molecular weight” means "weight average molecular weight”.
  • the alicyclic epoxy compound may mean a compound including at least one alicyclic epoxy group.
  • the term "alicyclic epoxy group” means a functional group having an aliphatic saturated hydrocarbon ring, and the two carbon atoms constituting the ring also constitute an epoxy group.
  • Epoxycyclohexylmethyl epoxycyclohexane carboxylate type compound For example, Epoxycyclohexane carboxylate type compound; Epoxycyclohexane carboxylate compounds of alkanediols; Epoxy cyclohexylmethyl ester compounds of dicarboxylic acids; Epoxycyclohexylmethyl ether compounds of polyethylene glycol; Epoxycyclohexylmethyl ether compounds of alkanediols; Diepoxy citris-pyro compounds; Diepoxy monospiro compounds; Vinylcyclohexene diepoxide compound; Epoxycyclopentyl ether compounds or diepoxy tricyclo decane compounds and the like can be exemplified, specifically, 7-oxabicyclo [4,1,0] heptan-3-carboxylic acid and (7-oxa-bicyclo [4, 1,0] hepto-3-yl) methanol; Ester of 4-methyl-7-oxabicyclo [4,1,
  • alicyclic epoxy compound as a bifunctional epoxy compound, that is, a compound having two epoxy, a compound in which the two epoxy groups are both alicyclic epoxy groups can be used.
  • the epoxy compound which has an aliphatic epoxy group other than an alicyclic epoxy group can be illustrated.
  • polyglycidyl ether of aliphatic polyhydric alcohol Polyglycidyl ethers of alkylene oxide adducts of aliphatic polyhydric alcohols; Polyglycidyl ethers of polyester polyols of aliphatic polyhydric alcohols and aliphatic polyhydric carboxylic acids; Polyglycidyl ethers of aliphatic polyvalent carboxylic acids; Polyglycidyl ethers of polyester polycarboxylic acids of aliphatic polyhydric alcohols and aliphatic polyhydric carboxylic acids; Dimers, oligomers or polymers obtained by vinyl polymerization of glycidyl acrylate or glycidyl methacrylate; Or oligomers or polymers obtained by vinyl polymerization of glycidyl acrylate or glycidyl meth
  • aliphatic polyhydric alcohol for example, an aliphatic polyhydric alcohol having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms or 2 to 4 carbon atoms may be exemplified.
  • Ethylene glycol 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 1,4-butanediol, neo Pentyl glycol, 3-methyl-2,4-pentanediol, 2,4-pentanediol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 2-methyl-2,4-pentanediol, 2,4-diethyl-1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 3,5-heptanediol, 1,8-octanediol, 2-methyl-1,8- Aliphatic diols such as octanediol, 1,9-nonane
  • alkylene oxide of 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms can be exemplified, for example, ethylene jade Seeds, propylene oxide or butylene oxide and the like can be used.
  • aliphatic polyhydric carboxylic acid for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, subberic acid, azelaic acid, sebacic acid, dodecaneic acid, 2-methyl succinic acid , 2-methyl adipic acid, 3-methyl adipic acid, 3-methylpentaneic acid, 2-methyloctanoic acid, 3,8-dimethyldecane diacid, 3,7-dimethyldecane diacid, 1,20-eicosamethylene Dicarboxylic acid, 1,2-cyclopentanedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1 , 4-cyclohexanedicarboxylic acid, 1,4-dicarboxymethylenecyclohexane, 1,2,
  • aliphatic epoxy compound it is appropriate to use a compound which does not contain an alicyclic epoxy group but also contains three or more epoxy groups or three epoxy groups, in consideration of curability, weather resistance and refractive index characteristics, but is not limited thereto.
  • an aromatic epoxy compound As an epoxy compound containing an aromatic group in a molecule
  • numerator for example, Bisphenol-type epoxy resins, such as a bisphenol A type epoxy, a bisphenol F type epoxy, a bisphenol S epoxy, or a brominated bisphenol type epoxy; Novolac type epoxy resins such as phenol novolac type epoxy resins or cresol novolac type epoxy resins; Cresol epoxy resin, resorcinol glycidyl ether, etc. can be illustrated.
  • Bisphenol-type epoxy resins such as a bisphenol A type epoxy, a bisphenol F type epoxy, a bisphenol S epoxy, or a brominated bisphenol type epoxy
  • Novolac type epoxy resins such as phenol novolac type epoxy resins or cresol novolac type epoxy resins
  • Cresol epoxy resin resorcinol glycidyl ether, etc.
  • a silane compound having a cationically polymerizable functional group may also be exemplified, and such a compound may be used as a component capable of improving adhesion by controlling the surface energy of the adhesive, for example.
  • a silane compound the compound represented by following formula (3) can be used, for example.
  • R 1 is a cationically polymerizable functional group bonded to a silicon atom
  • R 2 is a hydrogen, hydroxy group, alkyl group or alkoxy group as a functional group bonded to a silicon atom
  • n is a number from 1 to 4.
  • Examples of the cationically polymerizable functional group include a cyclic ether or a vinyloxy group such as an alkenyl group such as a vinyl group, a glycidyl group or an oxetanyl group, or the like, or the alkenyl group, a cyclic ether group or a vinyloxy group.
  • a functional group etc. which are mentioned can be illustrated.
  • N in Formula 3 may be, for example, 1 or 2.
  • silane compound an oligomer-type silane compound in which the cationically polymerizable functional group is introduced into a molecule of a siloxane oligomer which is a low molecular weight silicone resin whose terminal of the molecular chain is sealed with an alkoxysilyl group can also be used.
  • the compound which has a radically polymerizable functional group such as an acryloyl group or a methacryloyl group, can superpose
  • polymerize and form an adhesive agent can be used.
  • the radically polymerizable compound may be an acrylamide-based compound.
  • the acrylamide-based radically polymerizable compound include compounds represented by the following general formula (4).
  • R 1 and R 2 are each independently hydrogen, an alkyl group, or a hydroxyalkyl group, or R 1 and R 2 are connected to form a heterocyclic structure including nitrogen, and R 3 is hydrogen or an alkyl group.
  • heterocyclic structure may refer to a structure of a cyclic compound including at least two or more different atoms as ring constituent atoms, unless otherwise specified.
  • the heterocyclic structure may include, for example, 3 to 20, 3 to 16, 3 to 12, or 3 including nitrogen of Formula 1 to which R 1 and R 2 are linked. It may contain from 8 to 8 ring constituent atoms. Examples of atoms that may be included in the heterocyclic structure in addition to the nitrogen may include carbon, oxygen, or sulfur, and additional nitrogen atoms other than the nitrogen of Formula 4 to which the R 1 and R 2 are connected as long as the heterocyclic structure is formed. It may also include.
  • the heterocyclic structure may not include an unsaturated bond such as a carbon carbon double bond, may include one or more as necessary, and may be optionally substituted by one or more substituents.
  • Examples of the compound of formula 4 include (meth) acrylamide, N-alkyl acrylamide, N-hydroxyalkyl (meth) acrylamide, N-acryloyl morpholine, and the like, but are not limited thereto.
  • heterocyclic acetal structure may refer to a heterocyclic structure including a structure in which two oxygen atoms are bonded to one same carbon atom by a single bond. That is, the compound may be, for example, a compound including a heterocyclic acetal structure and the radical polymerizable functional group at the same time.
  • the compound may, for example, serve as a diluent for adjusting the viscosity of the composition, and may also be used to improve adhesion with the liquid crystal layer.
  • the heterocyclic acetal structure may include 4 to 20, 4 to 16, 4 to 12, or 4 to 8 ring constituent atoms, and may be optionally substituted by one or more substituents. have.
  • the radically polymerizable compound may include a monovalent moiety derived from the compound of Formula 5 or 6 together with the radical polymerizable functional group.
  • R 4 and R 5 each independently represent a hydrogen or an alkyl group
  • Q, P, R and T are each independently a carbon atom or an oxygen atom
  • two of Q, P, R and T are It is an oxygen atom
  • a and B respectively independently represent a C1-C5 alkylene group or an alkylidene group.
  • a compound represented by the following Chemical Formula 7 may be exemplified.
  • R 6 represents hydrogen or an alkyl group
  • R 7 is an alkyl group substituted with a monovalent residue or the monovalent residue derived from the structure of Formula 5 or 6 above.
  • Examples of the compound represented by the formula (7) include (2-ethyl-2-methyl-1,3-dioxolan-4yl) methyl acrylate ((2-ethyl-2-methyl-1,3-dioxolane-4- yl) methyl acylate), (2-isobutyl-2-methyl-1,3-dioxolan-4-yl) methylacrylate ((2-isobutyl-2-methyl-1,3-dioxolane-4-yl ) methyl acylate) or (1,4-dioxaspiro [4,5] dec-2-yl) methyl acrylate ((1,4-dioxaspiro [4,5] dec-2-yl) methyl acylate) It may be illustrated, but is not limited thereto.
  • the monomer represented by either of the following general formula (8-10) can also be illustrated.
  • R is hydrogen or an alkyl group
  • A, B, T, U and W are each independently an alkylene group or an alkylidene group
  • Q is an alkyl group or an aryl group
  • n is a number of 0 to 5 to be.
  • aryl group may mean a monovalent moiety derived from a compound or derivative thereof including benzene or a structure containing two or more benzenes condensed or bonded. have.
  • the aryl group may be, for example, an aryl group having 6 to 22 carbon atoms, 6 to 16 carbon atoms, or 6 to 13 carbon atoms, and for example, a phenyl group, phenylethyl group, phenylpropyl group, benzyl group, tolyl group, and xylyl group. (xylyl group) or a naphthyl group.
  • N in Formula 8 may be, for example, a number of 0 to 3 or 0 to 2.
  • 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate , 8-hydroxyoctyl (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate or 2-hydroxypropylene glycol (meth) acrylate and the like can be exemplified, but is not limited thereto.
  • T may be, for example, an alkylene group having 1 to 4 carbon atoms
  • beta carboxyethyl (meth) acrylate may be exemplified
  • Q may be, for example, an alkyl group having 1 to 4 carbon atoms
  • U and W may be each independently an alkylene group having 1 to 4 carbon atoms.
  • Such compounds include, but are not limited to, 2- (2-ethoxyethoxy) ethyl (meth) acrylate.
  • the radically polymerizable compound may also be exemplified by the compound represented by the following formula (11), and such a compound may be used, for example, for improving the durability of the adhesive.
  • R is hydrogen or an alkyl group
  • P is a monovalent moiety derived from an aliphatic saturated hydrocarbon cyclic compound.
  • the monovalent moiety may mean an aliphatic saturated hydrocarbon cyclic compound, specifically, a compound having a carbon atom bonded in a ring shape, and a monovalent moiety derived from a compound other than an aromatic compound or a derivative thereof.
  • the aliphatic saturated hydrocarbon cyclic compound may be, for example, an aliphatic saturated hydrocarbon cyclic compound having 3 to 20 carbon atoms, 6 to 15 carbon atoms, or 8 to 12 carbon atoms.
  • Examples of such monovalent residues include isobornyl group, cyclohexyl group, norbornanyl group, norbornanyl group, norbornenyl group, dicyclopentadienyl group, ethynylcyclohexane group, and ethynyl
  • a cyclohexene group or an ethynyl decahydronaphthalene group may be exemplified, and in one example, an isobornyl group may be used, but is not limited thereto.
  • an isocyanate functional acrylic ester compound may also be used.
  • any compound may be used without particular limitation, as long as it is a compound containing an isocyanate group and an acryl group at the same time.
  • an isocyanate-functional aliphatic acrylic ester can be used, and for example, a compound represented by the following formula (12) can be used.
  • R represents hydrogen or an alkyl group
  • L represents a divalent hydrocarbon group
  • a divalent aliphatic hydrocarbon group may be used, and specifically, 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
  • Divalent aliphatic hydrocarbon groups can be used.
  • Examples of the divalent hydrocarbon group include a linear, branched or cyclic alkylene group or alkynylene group; Linear, branched or cyclic alkenylene groups; Or linear, branched or cyclic alkynylene groups.
  • the hydrocarbon group may be, for example, a linear or branched alkylene group or alkynylene group having 1 to 8 carbon atoms.
  • Examples of the compound include (meth) acryloyloxyalkyl isocyanate and the like, and (meth) acryloyloxy (C 1-8 ) alkyl isocyanate and (meth) acryloyloxy (C 1-4 ) Alkyl isocyanate or (meth) acryloyloxyethyl isocyanate, etc. may be illustrated, but is not limited thereto.
  • (C 1-8 ) alkyl means straight, branched or cyclic alkyl having 1, 2, 3, 4, 5, 6, 7 or 8 carbon atoms
  • (C 1-4 ) alkyl is By straight, branched or cyclic alkyl of 1, 2, 3 or 4 carbon atoms is meant.
  • the compound represented by following formula (13) can also be used, for example.
  • R represents hydrogen or an alkyl group
  • Z represents a tetravalent hydrocarbon group
  • a tetravalent hydrocarbon group for example, a tetravalent aliphatic hydrocarbon group can be used, and specifically, a tetravalent aliphatic hydrocarbon having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
  • Groups can be used.
  • the hydrocarbon group may be, for example, a tetravalent hydrocarbon group derived from straight or branched alkanes having 1 to 8 carbon atoms.
  • a compound having a heterocyclic moiety such as tetrahydrofurfuryl (meth) acrylate or (meth) acryloyl morpholine may also be used. May also be used.
  • a cationic curable adhesive composition containing an alicyclic and / or aliphatic epoxy compound as a main component as a cationically polymerizable compound, and optionally comprising an oxetane compound or a silane compound having the cationically polymerizable functional group as a diluent or additive.
  • Radical curable adhesive composition which contains the said acrylamide compound as a main component as a radically polymerizable compound, and contains another radically polymerizable compound as a subcomponent as needed;
  • An adhesive comprising a mixture of a compound and a hybrid curable adhesive composition comprising a radically polymerizable compound represented by any one of Formulas 8 to 10 in a cured state may be used, but is not limited thereto.
  • the adhesive composition for forming the adhesive may further include a polymerization initiator.
  • the polymerization initiator may be selected according to the components included in the adhesive composition, for example, cationic polymerization initiator and / or radical polymerization initiator may be used.
  • initiators such as a benzoin system, a hydroxy ketone compound, an amino ketone compound, or a phosphine oxide compound
  • a phosphine oxide compound etc. can be used.
  • Specific examples of the radical polymerization initiators include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, benzoin isobutyl ether, acetophenone and dimethylanino acetophenone.
  • a cationic polymerization initiator for example, as an initiator for releasing a component capable of initiating cationic polymerization by irradiation with an active energy ray, an ionizing cationic initiator of an onium salt or an organometallic salt series Or non-ionized cation initiators such as organic silanes or latent sulfonic acid series or other non-ionized compounds.
  • the adhesive composition may further contain a thermosetting agent, a catalyst, a UV curing agent, a low molecular weight, a silane coupling agent, a scattering agent, an ultraviolet stabilizer, a colorant, a reinforcing agent, a filler, an antifoaming agent, a surfactant, a photosensitizer and a plasticizer, as necessary. It may further include additives such as one or more kinds.
  • the optical film and the linear polarizer may be directly attached through the adhesive layer, and if necessary, further include a primer layer between the linear polarizer and the adhesive layer or between the optical film and the adhesive layer.
  • a primer layer may be positioned between the linear polarizer 401 and the adhesive layer 501 or between the adhesive layer 501 and the optical film 402. .
  • the type of the primer layer is not particularly limited, and in general, all of the various kinds used for improving adhesion may be used.
  • the circular polarizing plate may further include a protective layer of the linear polarizer existing on one side of the linear polarizer, for example, on the side opposite to the surface in contact with the optical film of the linear polarizer, or present on both sides of the linear polarizer.
  • the present application also relates to a method of manufacturing a circularly polarizing plate.
  • An exemplary method of manufacturing may include attaching a linear polarizer and an optical film.
  • the linear polarizer and the optical film may be attached such that the light absorption axis of the linear polarizer and the optical axis of the polymer layer of the optical film form 45 degrees or 67.5 degrees, or any angle in the range of 45 degrees to 67.5 degrees. have.
  • the method of attaching the optical film and the linear polarizer is not particularly limited.
  • the adhesive composition described above is coated on one surface of the linear polarizer or the optical film, and the linear polarizer and the optical film are laminated through the coating layer to cure the adhesive composition or dropping using the adhesive composition.
  • curing an adhesive composition can be used. Curing of the adhesive composition in the above, for example, in consideration of the components contained in the composition may be carried out by irradiating an active energy ray of a suitable intensity with an appropriate amount of light.
  • the manufacturing method of the circular polarizing plate may be continuously performed following the manufacturing method of the optical film described above.
  • the polymer layer 101 forms 45 degrees or 67.5 degrees with one direction M, for example, the optical axis OP of the polymer layer 101, or 45 degrees.
  • the optical film is manufactured by forming a liquid crystal layer on the polymer layer 101 while transferring in a direction forming any one angle in the range of 67.5 degrees.
  • the liquid crystal layer may be formed such that the optical axis OP of the liquid crystal layer and the optical axis OP of the polymer layer 101 are substantially perpendicular or approximately 61.5 degrees.
  • the circularly polarizing plate may be manufactured by attaching a linear polarizer while continuously transporting the manufactured optical film in the transport direction M. In this process, when the light absorption axis of the linear polarizer is made horizontal with the transport direction M of the film, the circularly polarizing plate can be efficiently and continuously manufactured.
  • the linear polarizer When the linear polarizer is attached, for example, when the optical axis of the polymer layer and the optical axis of the liquid crystal layer are perpendicular to each other, the linear polarizer may be attached such that the optical absorption axis of the linear polarizer and the optical axis of the polymer layer are about 45 degrees. When the optical axis of and the optical axis of the liquid crystal layer are 61.5 degrees, the light absorption axis of the linear polarizer and the optical axis of the polymer layer may be attached so as to form about 67.5 degrees.
  • the present application also relates to a display device.
  • An exemplary display device may include the circular polarizer.
  • the specific kind of the display device including the circular polarizer is not particularly limited.
  • the device may be, for example, an LCD such as a liquid crystal display (LCD) or a transflective LCD, or an organic light emitting device (OLED).
  • LCD liquid crystal display
  • OLED organic light emitting device
  • the arrangement of the circular polarizing plate in the display device is not particularly limited, and a known form may be adopted, for example.
  • the circular polarizing plate may be used as one of the polarizing plates of the polarizing plate of the LCD panel in order to prevent anti-reflective and visibility of external light.
  • the circularly polarizing plate may be disposed outside the electrode layer of the OLED.
  • Exemplary optical films of the present application can, for example, exhibit desired phase retardation characteristics in a relatively thin thickness but in a broad wavelength range.
  • the optical film may exhibit a quarter wavelength phase delay property.
  • the said optical film can be manufactured by a simple process.
  • the optical film may be used, for example, in an LCD or OLED, such as a reflective LCD or the like.
  • 1 and 2 are schematic diagrams of exemplary optical films.
  • FIG 3 is a schematic view for explaining one exemplary manufacturing method of an optical film.
  • 4 and 5 are schematic diagrams of exemplary circular polarizing plates.
  • ⁇ 1 Angle between the optical axis (OP) and the transport direction (M) of the polymer layer
  • ⁇ 2 angle formed between the optical axis OP of the polymer layer and the optical axis OL of the liquid crystal layer
  • optical film will be described in more detail with reference to Examples and Comparative Examples, but the scope of the optical film is not limited by the Examples given below.
  • each physical property may be evaluated in the following manner.
  • Axoscan manufactured by Axomatrics
  • 16 Muller Matrix 16 Muller Matrix
  • Polarizance Ellipticity is a numerical value representing the circular polarization efficiency of the optical film or circular polarizing plate manufactured in the Examples or Comparative Examples, and can be measured according to the manufacturer's manual using Axoscan (manufactured by Axomatrics).
  • a liquid crystal layer having a retardation of approximately 105 nm for a wavelength of 550 nm was formed in the following manner.
  • the composition for forming the photo-alignment layer on one surface of the cyclic olefin polymer film was coated so that the thickness after drying was about 1,000 mm 3, and dried in an oven at 80 ° C. for 2 minutes.
  • the dried composition for forming an optical alignment layer was subjected to alignment treatment, and the optical alignment layer was formed by performing alignment treatment such that the optical axis of the liquid crystal layer formed by the alignment layer was about 61.5 degrees with the optical axis of the cyclic olefin polymer film.
  • a wire grid polarizer capable of generating linearly polarized light on the dried composition is positioned in consideration of the formation position of the optical axis, while moving the cyclic olefin polymer film at a speed of about 3 m / min.
  • an alignment treatment was performed by irradiating ultraviolet (300 mW / cm 2 ) to the composition for forming an optical alignment layer through the polarizing plate for about 30 seconds. Subsequently, a liquid crystal layer was formed on the alignment layer subjected to the alignment treatment.
  • a liquid crystal composition comprising 70 parts by weight of the polyfunctional polymerizable liquid crystal compound represented by the following general formula (B) and 30 parts by weight of the monofunctional polymerizable liquid crystal compound represented by the following general formula (C), comprising an appropriate amount of a photoinitiator:
  • ultraviolet light 300 mW / cm 2
  • a liquid crystal layer having an optical axis of about 61.5 degrees to prepare an optical film.
  • a circularly polarizing plate was manufactured by attaching a conventional polyvinyl alcohol linear polarizer to the prepared optical film.
  • the adhesion was performed such that the linear polarizer was attached to the cyclic olefin film, and in this process, the optical absorption axis of the linear polarizer and the optical axis of the cyclic olefin film were about 67.5 degrees.
  • An optical film and a circular polarizing plate were manufactured in the same manner as in Example 1, except that the phase retardation was about 135 nm with respect to the wavelength of 550 nm of the liquid crystal layer, and the optical axis of the liquid crystal layer and the optical axis of the cyclic olefin polymer film were substantially
  • An optical film and a circular polarizer were manufactured by vertically forming the optical axis of the cyclic olefin film and the optical absorption axis of the linear polarizer.
  • a circular polarizing plate was prepared by attaching a cyclic olefin film having a plane phase difference of about 140 nm to a light having a wavelength of 550 nm with a polyvinyl alcohol-based linear polarizer, wherein the optical absorption axis of the linear polarizer and the optical axis of the cyclic olefin film were A circularly polarizing plate was prepared at about 45 degrees.
  • a circularly polarizing plate was manufactured by forming a liquid crystal layer on a polyvinyl alcohol linear polarizer in a similar manner as in Example 1.
  • the liquid crystal layer had a planar phase difference of about 550 nm of light at a wavelength of about 135 nm, and the circular polarizing plate was manufactured such that the optical axis of the liquid crystal layer and the light absorption axis of the linear polarizer were about 45 degrees.
  • Angle Ellipticity Polarizance Ellipticity measured for light with a wavelength of 450 nm, 550 nm or 650 nm. Evaluated by evaluating the anti-reflective properties of the manufactured circularly polarizing plate. If it is close, it is indicated by O, and if it is colored, it is indicated by X)
  • An optical film and a circularly polarizing plate were manufactured in the same manner as in Example 1, except that the polymer film had a retardation of about 270 nm with respect to light having a wavelength of 550 nm, and R (450) / R (550) was 1,
  • a cyclic olefin polymer film having R (650) / (R550) of 1 is used, and as the liquid crystal layer, the surface retardation with respect to light having a wavelength of 550 nm is about 135 nm, and R (450) / R (550).
  • ) was 1.09, and the liquid crystal layer formed using the liquid crystal composition adjusted so that R (650) / (R550) might be 0.93 was used.
  • the optical axis of the liquid crystal layer and the optical axis of the cyclic olefin polymer film were substantially perpendicular, and the optical axis of the cyclic olefin film and the light absorption axis of the linear polarizer were about 45 degrees.
  • the Polarizance Elliptcicity measured in the same manner as in Examples and Comparative Examples above was about 0.88 for 450 nm light, about 0.94 for 550 nm light, and about 0.81 for 650 nm light.
  • black visibility was confirmed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente application concerne une pellicule optique, une plaque de polarisation circulaire, et un dispositif d'affichage. Une pellicule optique d'exemple de l'application, par exemple, peut présenter des caractéristiques de retard de phase dans une large plage de longueurs d'ondes même avec une épaisseur relativement mince. Dans un mode de réalisation, la pellicule optique peut présenter des caractéristiques de retard de phase de 1/4 de longueur d'onde. La pellicule optique peut être fabriquée au moyen d'un processus simple et utilisée pour les LCD comme les LCD réfléchissants, etc., ou les OLED, etc.
PCT/KR2012/002829 2011-04-13 2012-04-13 Pellicule optique WO2012141534A2 (fr)

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JP2014228864A (ja) * 2013-05-27 2014-12-08 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 逆波長分散位相遅延フィルムおよびこれを備える表示装置

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JP2003014928A (ja) * 2001-06-28 2003-01-15 Hayashi Telempu Co Ltd 光学異方素子の製造方法、および光学異方素子
KR20050084525A (ko) * 2003-02-03 2005-08-26 닛토덴코 가부시키가이샤 위상차 필름 및 그 제조방법

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WO2014065515A1 (fr) * 2012-10-23 2014-05-01 동우화인켐 주식회사 Composition servant à former une couche de cristaux liquides, et retardateur préparé avec ladite composition
JP2014228864A (ja) * 2013-05-27 2014-12-08 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 逆波長分散位相遅延フィルムおよびこれを備える表示装置
KR102057611B1 (ko) * 2013-05-27 2019-12-20 삼성전자주식회사 역파장 분산 위상 지연 필름 및 이를 포함하는 표시 장치

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