WO2014061389A1 - 光学積層フィルムの製造方法 - Google Patents

光学積層フィルムの製造方法 Download PDF

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Publication number
WO2014061389A1
WO2014061389A1 PCT/JP2013/075151 JP2013075151W WO2014061389A1 WO 2014061389 A1 WO2014061389 A1 WO 2014061389A1 JP 2013075151 W JP2013075151 W JP 2013075151W WO 2014061389 A1 WO2014061389 A1 WO 2014061389A1
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Prior art keywords
rubbing
film
optical laminated
angle
laminated film
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PCT/JP2013/075151
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English (en)
French (fr)
Japanese (ja)
Inventor
祥一 麻野井
祥一 松田
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日東電工株式会社
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Publication of WO2014061389A1 publication Critical patent/WO2014061389A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0073—Optical laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
    • B29C55/026—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets of preformed plates or sheets coated with a solution, a dispersion or a melt of thermoplastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00634—Production of filters
    • B29D11/00644—Production of filters polarizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/325—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polycycloolefins
    • 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
    • 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
    • G02F1/133528—Polarisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0034—Polarising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • 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
    • G02F1/133528—Polarisers
    • G02F1/133541—Circular polarisers

Definitions

  • the present invention relates to a method for producing an optical laminated film in which an optical laminated film is produced by laminating a polarizing film on a drawn film having a drawn axis.
  • a dichroic substance having lyotropic liquid crystallinity is applied to the surface of a substrate film and the dichroic material is oriented in the application direction. Further, by performing rubbing treatment in a direction substantially parallel to the orientation direction of the dichroic material, the orientation direction of the dichroic material, that is, the absorption axis direction of the polarizing film is controlled to obtain a polarizing film having a high degree of orientation. A method of manufacturing is described. JP 2009-139825 A
  • the present invention has been made in order to solve the above-mentioned problems of the prior art, and the orientation direction of the dichroic substance is desired for orienting the dichroic substance in the desired direction on the stretched film having the stretching axis.
  • An object of the present invention is to provide a method for producing an optical laminate that can be arbitrarily controlled in the direction and that can easily produce a circularly polarizing plate.
  • an optical laminated film manufacturing method is an optical laminated film in which an optical laminated film is produced by laminating a polarizing film on a drawn film having a drawing axis in one direction in the plane. And a rubbing process for rubbing the surface of the stretched film in a predetermined rubbing direction, and applying a liquid crystalline solution containing a dichroic material to the surface of the stretched film that has been rubbed in the rubbing process.
  • the rubbing direction in the process is based on the rubbing angle larger than the crossing angle formed by the stretching axis of the stretched film and the absorption axis of the polarizing film. Characterized in that it is a constant.
  • the method for producing an optical laminate according to claim 2 is the method for producing an optical laminate film according to claim 1, wherein the stretched film is a retardation film, and the optical laminate film is a circularly polarizing plate.
  • the method for producing an optical laminated film according to claim 3 is the method for producing an optical laminated film according to claim 1 or 2, wherein the rubbing direction is determined such that the rubbing angle is 45 ° or more.
  • the method for producing an optical laminated film according to claim 4 is the method for producing an optical laminated film according to claim 3, wherein the rubbing direction is determined so that the rubbing angle is in a range of 46 ° to 60 °.
  • a liquid crystalline solution containing a dichroic substance is applied to the surface of a stretched film that has been rubbed in a rubbing process, and the dichroic substance is orthogonal to the rubbing direction.
  • the rubbing direction in the rubbing process is determined by the stretching axis of the stretched film and the orthogonal direction, and the intersection of the stretching axis of the stretched film and the absorption axis of the polarizing film Since it is determined based on a rubbing angle larger than the angle, the crossing angle between the stretched axis of the stretched film and the absorption axis of the polarizing film is substantially adjusted by adjusting the rubbing direction with respect to the stretched film as the retardation film.
  • a circularly polarizing plate can be easily manufactured by setting it to 45 °.
  • FIG. 1 shows the slow axis direction and dichroism of a retardation film when a circularly polarizing plate is produced by applying a liquid crystalline solution containing a dichroic substance on a retardation film which is a stretched film by a conventional production method. It is explanatory drawing which shows typically the relationship with the orientation direction of a substance.
  • FIG. 2 shows the slow axis direction and position of the retardation film when a circularly polarizing plate is produced by applying a liquid crystalline solution containing a dichroic substance on the retardation film which is a stretched film by the production method according to the present invention. It is explanatory drawing which shows typically the relationship between the rubbing process direction of a phase difference film, and the orientation direction of a dichroic substance.
  • a polarizing film by orienting a dichroic material on the film substrate by applying a liquid crystalline solution containing the dichroic material on the film substrate.
  • a polarizing film can be formed on a film without using an adhesive.
  • the dichroic material 3 is oriented so that the absorption axis direction 4 (major axis direction of the molecule) and the slow axis direction 1 of the retardation film are parallel based on the orientation regulating force acting in the slow axis direction 1. Tend. For this reason, it is difficult to orient the absorption axis direction 4 of the dichroic material 3 in one direction in an arbitrary angle range with respect to the slow axis direction 1 in the plane of the retardation film 2. .
  • the dichroic substance 3 may be oriented so that the long axis direction 4 of the dichroic substance 3 is orthogonal to the slow axis direction 1.
  • the surface of the retardation film 2 is rubbed so that the dichroic material 3 is perpendicular to the rubbing direction.
  • the retardation film 2 It is necessary to determine the rubbing direction in consideration of both the orientation regulating force in the slow axis direction 1 of 2 and the orientation regulating force in the direction orthogonal to the rubbing direction by the rubbing process.
  • the absorption axis direction 4 of the dichroic substance 3 (the long axis direction of the molecule and the orientation direction) is in the rubbing direction 5 based on the orientation regulating force based on the slow axis direction 1 and the rubbing treatment in the retardation film 2. It is determined by the balance with the orientation regulating force in the orthogonal direction 6, and tends to be a substantially intermediate direction between the slow axis direction 1 and the direction 6 orthogonal to the rubbing direction 5.
  • the angle formed by the slow axis direction 1 and the absorption axis direction 4 of the dichroic substance 3 is set as shown by the xy coordinates in FIG.
  • the rubbing angle ⁇ is composed of a slow axis direction 1 (45 ° with respect to the longitudinal direction of the retardation film 2) that is larger than the crossing angle ⁇ and a direction orthogonal to the rubbing direction 5.
  • the rubbing direction 5 is determined based on the above.
  • the dichroic material 3 has the absorption axis direction 4 (major axis direction of the molecule) in the slow axis direction. 1 and a direction 6 approximately perpendicular to the rubbing direction 5.
  • the absorption axis direction 4 of the dichroic material 3 exists within a desired angle range from the slow axis with reference to the slow axis direction 1.
  • the rubbing angle ⁇ formed by the orthogonal direction 6 is set to be larger than the crossing angle ⁇ formed by the slow axis direction 1 and the absorption axis direction 4, and the rubbing direction 5 is set based on the thus set rubbing angle ⁇ .
  • a circularly polarizing plate existing in the direction can be produced.
  • the ideal angle of the crossing angle ⁇ is 45 °.
  • the retardation film 2 The rubbing direction 5 is determined based on the rubbing angle ⁇ larger than the crossing angle ⁇ in consideration of the balance between the alignment regulating force based on the slow axis direction 1 and the alignment regulating force based on the direction 6 orthogonal to the rubbing direction 5. Therefore, the crossing angle ⁇ can be brought as close as possible to the ideal angle of 45 ° by adjusting the rubbing direction 5 in various ways. This makes it possible to manufacture a circularly polarizing plate that can generate ideal circularly polarized light.
  • the slow axis direction of the retardation film when producing a circularly polarizing plate by applying a liquid crystalline solution containing a dichroic substance on the retardation film which is a stretched film by the production method according to the present invention It is explanatory drawing which shows typically the relationship between a rubbing process direction and the orientation direction of a dichroic substance. It is explanatory drawing which shows the relationship between the rubbing angle and the crossing angle in Example 1-5 which created the circularly-polarizing plate by changing the rubbing process direction variously.
  • the manufacturing method of the circularly-polarizing plate concerning this embodiment is with respect to the retardation film which has a slow axis in one direction in a surface, and the slow axis direction of a retardation film. And a polarizing film having an absorption axis in one direction in a range of 35 ° to 53 °.
  • Such a circularly polarizing plate is manufactured by performing a rubbing step and a polarizing film forming step described later. Note that an optional step may be included between the rubbing step and the polarizing film forming step.
  • the rubbing process performed in the rubbing process is performed in order to orient the dichroic substance 3 when a liquid crystalline solution containing the dichroic substance 3 is applied to the surface of the retardation film 2.
  • This is a process of rubbing the surface of 2 with a rubbing cloth.
  • the rubbing process is performed by, for example, winding a rubbing cloth having a raised pile around an iron core and pressing the cloth against the surface of the retardation film 2.
  • a rubbing cloth For example, a cotton, rayon, etc. are used.
  • the rubbing direction with respect to the retardation film 2 is determined by the rubbing angle ⁇ (determined by the slow axis direction 1 of the retardation film 2 and the direction 6 orthogonal to the rubbing direction 5). It is determined to be larger than the crossing angle ⁇ formed by the slow axis and the absorption axis direction 4 of the dichroic material 3.
  • a liquid crystal solution containing the dichroic material 3 is applied to the surface of the retardation film 2 that has been rubbed in the rubbing step, and is polarized by applying it. This is a step of forming a film.
  • the liquid crystalline solution usually contains a dichroic substance 3 and a solvent.
  • the dichroic material 3 is preferably a lyotropic liquid crystal compound.
  • a lyotropic liquid crystal compound is a compound that causes a phase change from an isotropic phase to a liquid crystal phase (or vice versa) by a change in concentration, temperature, etc. in the solution in a state dissolved in a solvent.
  • lyotropic liquid crystal compound for example, an azo compound, an anthraquinone compound, a perylene compound, a quinophthalone compound, a naphthoquinone compound, a merocyanine compound, and the like are preferable. This is because it exhibits absorption dichroism in the visible light region and excellent orientation.
  • the concentration of the dichroic substance 3 is preferably 2 to 30% by weight of the dichroic substance 3 with respect to the total weight of the liquid crystal solution.
  • the liquid crystal solution may be applied by any method that can uniformly cast the liquid crystal solution. For example, a wire bar, a gap coater, a comma coater, a gravure coater, a slot die, or the like can be used. At this time, the applied liquid crystalline solution may be naturally dried or heat dried.
  • the liquid crystalline solution is preferably applied in a concentration lower than the isotropic phase-liquid crystal phase transition concentration, that is, in an isotropic phase state. In this case, the orientation regulating force due to the shear stress at the time of coating is not received, and stable orientation can be achieved between the slow axis direction and the rubbing treatment direction.
  • Circularly polarizing plate obtained by the manufacturing method according to the present embodiment has a circular shape with any wavelength in the visible light region (wavelength 380 nm to 780 nm) when linearly polarized light is incident from a specific direction. It generates polarized light.
  • the circularly polarizing plate includes a retardation film 2 having a slow axis in one direction in the plane (slow axis direction 1), and a range of 35 ° to 53 ° with respect to the slow axis direction 1 of the retardation film 2. And a polarizing film having an absorption axis in one direction (absorption axis direction 4).
  • the circularly polarizing plate converts natural light or linearly polarized light into circularly polarized light. Can do.
  • the total thickness of the circularly polarizing plate is preferably 50 ⁇ m or less, more preferably 20 ⁇ m to 40 ⁇ m.
  • the retardation film 2 has a slow axis in one direction in the plane (slow axis direction 1).
  • the slow axis direction 1 of the retardation film 2 is preferably 25 ° to 65 ° with respect to its length direction.
  • the thickness of the retardation film 2 is preferably 10 ⁇ m to 45 ⁇ m.
  • the material for forming the retardation film 2 is not particularly limited, and examples thereof include norbornene polymer films, polyester resins, cellulose resins, cycloolefin resins, and acrylic resins.
  • norbornene polymer films polyester resins, cellulose resins, cycloolefin resins, and acrylic resins.
  • the retardation film 2 having the slow axis in one direction in the range of 25 ° to 65 ° in the plane with respect to the longitudinal direction of the retardation film 2 is used, the slow axis and absorption It is possible to easily obtain a long circularly polarizing plate having an intersection angle ⁇ formed with the axis of about 45 °.
  • the polarizing film exhibits absorption dichroism at any wavelength in the visible light region, and has an absorption axis in one direction in the plane (absorption axis direction 4). Absorption dichroism is obtained by orienting the dichroic material 3 in the polarizing film.
  • the concentration of the dichroic substance 3 in the polarizing film is preferably 80% by weight to 100% by weight with respect to the total weight of the polarizing film.
  • the thickness of the polarizing film is preferably 0.1 ⁇ m to 5 ⁇ m.
  • the circularly polarizing plate obtained by this embodiment is used for a liquid crystal display or an organic EL display, for example, and can realize high contrast even on a large screen.
  • Example 1 A norbornene polymer film having a slow axis in the 45 ° direction (slow axis direction 1) is used as the retardation film 2 (trade name “ZD series” manufactured by Nippon Zeon Co., Ltd.), and the rubbing angle is based on the slow axis direction 1
  • the rubbing process was performed by setting the rubbing direction 5 so that ⁇ was 42 °.
  • microfiber manufactured by Kuraray Co., Ltd.
  • the rubbing cloth was used in a state of being wound around an iron core.
  • the phase difference film 2 after the rubbing treatment is subjected to corona treatment, and a coating solution is applied in a rubbing direction 5 using a bar coater (product name “Mayer rot HS5” manufactured by BUSHMAN), and then naturally dried in a thermostatic chamber at 23 ° C.
  • a bar coater product name “Mayer rot HS5” manufactured by BUSHMAN
  • the absorption axis angle of the circularly polarizing plate thus produced was measured using KOBRA-WPR (manufactured by Oji Scientific Instruments).
  • the absorption axis direction 4 is inclined to the slow axis direction 1 side with respect to the direction 6 orthogonal to the rubbing direction 5, and the crossing angle ⁇ is 35 °.
  • Example 2 A circularly polarizing plate was prepared in the same manner as in Example 1 except for the rubbing treatment.
  • the direction 6 perpendicular to the rubbing direction 5 in the rubbing process is directed downward by 3 ° from the case of the first embodiment, and the rubbing angle ⁇ is 45 ° as shown in FIG. ⁇ was 40 °.
  • Example 3 A circularly polarizing plate was prepared in the same manner as in Example 1 except for the rubbing treatment.
  • the direction 6 perpendicular to the rubbing direction 5 in the rubbing process is directed downward by 5 ° from the case of the second embodiment, and the rubbing angle ⁇ is 50 ° as shown in FIG.
  • the angle ⁇ was 44 °.
  • Example 4 A circularly polarizing plate was prepared in the same manner as in Example 1 except for the rubbing treatment.
  • the direction 6 orthogonal to the rubbing direction 5 in the rubbing process is directed downward by 5 ° from the case of the third embodiment, and the rubbing angle ⁇ is 55 ° as shown in FIG.
  • the angle ⁇ was 49 °.
  • Example 5 A circularly polarizing plate was prepared in the same manner as in Example 1 except for the rubbing treatment.
  • the direction 6 orthogonal to the rubbing direction 5 in the rubbing process is directed downward by 5 ° from the case of the fourth embodiment, and the rubbing angle ⁇ is 60 ° as shown in FIG.
  • the angle ⁇ was 53 °.
  • the rubbing roll which performs the rubbing process at the same time while conveying the long retardation film 2 is used. If the roll axis of the rubbing roll is set in the range of ⁇ 45 ° on the conveyance direction side or the opposite direction side with respect to the orthogonal direction, the circularly polarizing plate can be continuously produced by Roll to Roll. .
  • Measurement Method Used in Examples (1) Measurement of Thickness Measurement was performed using a digital gauge (manufactured by Ozaki Seisakusho, product name “PEACOCK”). (2) Quality evaluation A sample cut out from the long circular polarizing plate of the example was placed on a white light source, the sample was rotated left and right, and the size and amount of scratches caused by the rubbing treatment were visually observed. did.
  • the present invention allows the dichroic material to be oriented in a desired direction on a stretched film having a stretching axis, and the orientation direction of the dichroic material can be arbitrarily controlled in the desired direction. It is possible to provide a method for producing an optical laminate that can be easily produced, and the effect produced in the industry is great.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Dispersion Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Electroluminescent Light Sources (AREA)
PCT/JP2013/075151 2012-10-17 2013-09-18 光学積層フィルムの製造方法 WO2014061389A1 (ja)

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JP7322628B2 (ja) * 2019-09-20 2023-08-08 Jsr株式会社 円偏光板の製造方法

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JP2004070344A (ja) * 2002-07-23 2004-03-04 Nitto Denko Corp 光学フィルムおよびそれを用いた液晶表示装置
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