WO2013005821A1 - Appareil d'affichage d'image, film de protection et procédé de fabrication d'un film de protection - Google Patents

Appareil d'affichage d'image, film de protection et procédé de fabrication d'un film de protection Download PDF

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Publication number
WO2013005821A1
WO2013005821A1 PCT/JP2012/067274 JP2012067274W WO2013005821A1 WO 2013005821 A1 WO2013005821 A1 WO 2013005821A1 JP 2012067274 W JP2012067274 W JP 2012067274W WO 2013005821 A1 WO2013005821 A1 WO 2013005821A1
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WO
WIPO (PCT)
Prior art keywords
image display
protective film
film
angle
display unit
Prior art date
Application number
PCT/JP2012/067274
Other languages
English (en)
Japanese (ja)
Inventor
祐也 北出
大輔 山川
佑輔 高橋
佳美 杉浦
Original Assignee
Dic株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2011150837A external-priority patent/JP2013019941A/ja
Priority claimed from JP2012053029A external-priority patent/JP2013185121A/ja
Application filed by Dic株式会社 filed Critical Dic株式会社
Priority to KR1020147003273A priority Critical patent/KR20140045543A/ko
Priority to CN201280043470.5A priority patent/CN103782229A/zh
Publication of WO2013005821A1 publication Critical patent/WO2013005821A1/fr

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    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • 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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G02B1/105—
    • 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
    • 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
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133311—Environmental protection, e.g. against dust or humidity
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses
    • 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
    • G02F1/133635—Multifunctional compensators

Definitions

  • the present invention includes an image display module in which light emitted from the image display unit is linearly polarized light, and a transparent panel provided on an upper portion of the image display module, and a protective film is attached to at least one surface of the transparent panel.
  • the present invention relates to an image display apparatus. Moreover, this invention relates to the manufacturing method of the protective film used for the said image display apparatus, and the said protective film.
  • Image display devices such as liquid crystal displays (LCD) and organic EL displays are used in a wide range of fields including personal computers.
  • LCD liquid crystal displays
  • organic EL displays are used in a wide range of fields including personal computers.
  • electronic notebooks, cellular phones, portable audio players, and the like have been increasingly reduced in size and thickness in recent years, and further, there has been a demand for higher definition due to support for moving image playback functions and the like.
  • an image display image display module such as an LCD module or an organic EL module is included in the configuration, and a transparent panel that protects the image display image display module above the image display image display module Is used.
  • glass panels are often used as the above transparent panels for the purpose of improving the design and texture of electronic devices, and transparent panels are used to prevent damage to glass and to prevent glass from scattering when broken. (See, for example, Patent Document 1).
  • the emitted light is often linearly polarized due to the configuration of the module. Therefore, when viewing an image using polarized sunglasses or the like, there is a problem that the emitted linearly polarized light is orthogonal to the polarized sunglasses and the image cannot be seen.
  • the problem to be solved by the present invention is to realize an image display device capable of visually recognizing an image through polarized sunglasses even when a protective film for preventing panel scattering and scratches is provided.
  • the present invention has an object to provide a method for easily and inexpensively manufacturing a protective film that allows a user to visually recognize an image even when viewed through polarized sunglasses and to prevent panel scattering and scratches. To do.
  • the protective film of the transparent panel is a protective film based on a biaxially stretched resin film, and on the surface of the image display module, the polarization direction of linearly polarized light emitted from the image display unit, and biaxially stretched
  • the angle ⁇ 1 formed by one orientation axis direction of the resin film and the angle ⁇ 2 formed by the polarization direction of the linearly polarized light emitted from the image display unit and the other orientation axis direction of the biaxially stretched resin film are both The above-mentioned problem is solved by an image display device having an angle of 15 to 75 °.
  • the present invention provides an image display device having an image display module in which light emitted from the image display unit is linearly polarized light and a transparent panel provided on an upper portion of the image display module, and is attached to at least one surface of the transparent panel.
  • a method of manufacturing a protective film to be attached wherein the protective film is a protective film having a film base layer made of a biaxially stretched polyethylene-based resin film, And a step of obtaining a protective film having a substantially rectangular shape, and when the transparent panel having the protective film attached to the upper part of the image display module is provided in the punching process to the substantially rectangular shape,
  • the angle ⁇ 1 formed by the polarization axis of the linearly polarized light emitted and one of the orientation axes of the molecules of the film base material layer, and the light emitted from the image display unit The method for manufacturing a polarization axis and the protective film the other alignment axis and the angle ⁇ 2 of the molecules of the film substrate layer is punched to be 15 ⁇
  • the biaxially stretched resin film is used as a base material, so that the refractive index is increased in the two stretched axial directions. Further, by setting the orientation axis direction and the polarization direction of the linearly polarized light emitted from the image display module to 15 to 75 °, when the linearly polarized light is transmitted through the protective film, the influence of a plurality of refractive indexes is exerted.
  • Polarized sunglasses can be transmitted by rotating linearly polarized light.
  • the light transmittance is not lowered and the thickness of the image display portion is not increased.
  • the present invention uses a biaxially stretched protective film for the transparent panel as a base material, not only the optical rotation of light but also the scratch resistance and durability against impacts required for the protective film. Excellent.
  • a general-purpose biaxially stretched polyethylene resin film can be used as a base material, and a protective film having a desired optical axis can be obtained from the entire raw film of the protective film.
  • the manufacturing method of the present invention when the emitted light is used for the transparent panel of the linearly polarized image display device, the image can be satisfactorily viewed through the polarized sunglasses, and the panel is preferably scattered or damaged.
  • the protective film which can be prevented can be manufactured easily and inexpensively.
  • the present invention includes an image display module in which light emitted from the image display unit is linearly polarized light, and a transparent panel provided on an upper portion of the image display module, and a protective film is attached to at least one surface of the transparent panel.
  • the protective film is a protective film having a biaxially stretched resin film as a base material, and on the surface of the image display surface, the polarization direction of linearly polarized light emitted from the image display unit, An angle ⁇ 1 formed by one orientation axis direction of the axially stretched resin film, and an angle ⁇ 2 formed by the polarization direction of linearly polarized light emitted from the image display unit and the other orientation axis direction of the biaxially stretched resin film, Are both 15 to 75 °.
  • the image display module in the present invention is not particularly limited as long as the emitted light from the image display unit is linearly polarized light, and examples thereof include an LCD module and an organic EL module.
  • the module of the present invention also includes a module laminate in which a touch panel module or the like is provided on the upper part of these modules.
  • the shape of the image display unit of the image display module is preferably a substantially square shape.
  • the substantially square shape facilitates incorporation into various display devices, particularly small electronic terminals.
  • the substantially square shape means a rectangular or square square shape (FIG. 1 (a)), as well as a shape in which arbitrary corners of the square shape, preferably four corners are chamfered (FIG. 1 (b)). , (C)) and the like approximate to a square shape.
  • the polarization direction of linearly polarized light in the present invention is an image display device having a transparent panel 2 above an image display module 1 that emits linearly polarized light 3, and the transparent panel 2 is a surface layer of the image display device.
  • the polarization direction 5 (polarization axis) of the linearly polarized light 3 on the image display surface 4 is referred to.
  • an angle ⁇ 1 formed by the polarization direction of the linearly polarized light emitted from the image display unit and the side of the image display unit is 0 to 5 °. It is preferably 0 ° to 10 °. Since the polarization direction of the linearly polarized light can be easily recognized when the angle ⁇ 1 is within this range, the polarization axis of the linearly polarized light emitted from the image display unit and the one orientation axis direction of the biaxially stretched resin film of the protective film It is easy to adjust the angle ⁇ 1 formed by and the angle ⁇ 2 formed by the other orientation axis direction.
  • the angle ⁇ 2 formed by the polarization direction of the linearly polarized light emitted from the image display unit and the base of the image display unit is preferably 0 to 5 °, and more preferably 0 to 10 °. . In this range as well, the polarization direction of linearly polarized light can be easily recognized, so that the angle ⁇ 1 and the angle ⁇ 2 can be easily adjusted.
  • the transparent panel used for this invention is not specifically limited, As a panel generally used, there exist a glass plate, (meth) acrylic resin, polycarbonate resin, polyethylene terephthalate resin, etc. Particularly in recent years, it is preferable to use a glass panel for the purpose of improving the design and texture of an electronic device.
  • the glass panel is preferably a tempered glass plate.
  • the tempered glass include tempered glass manufactured by HOYA, Gorilla glass manufactured by Corning, and IG3 manufactured by Ishizuka Glass.
  • Examples of a method for strengthening the glass plate include a physical strengthening method and a chemical strengthening method.
  • chemical strengthening methods include an ion exchange method and an air cooling strengthening method.
  • Examples of the material of the glass plate include float glass, alkali glass, and alkali-free glass.
  • the transparent panel includes a case where an electrode layer or the like is patterned and has a function such as a touch sensor itself.
  • Decorative parts may be provided on transparent panels.
  • the decoration portion includes characters and figures that are visually recognized around the screen display portion of the mobile electronic terminal, or a black or white background provided on the back of these. These decorative portions are preferable because they can be easily provided by printing on a transparent panel.
  • the printing method and printing ink are not particularly limited, and a commonly used printing method such as silk printing or pad printing or printing ink can be used.
  • the thickness of the transparent panel is preferably 50 ⁇ m to 3 mm, preferably 75 ⁇ m to 2 mm, and more preferably 100 ⁇ m to 1 mm. When the thickness of the transparent panel is within the above range, the thickness can be reduced when applied to an electronic terminal.
  • the protective film used for this invention should just have a biaxially stretched resin film base material.
  • a biaxially stretched resin film substrate is a film produced by stretching biaxially in a film stretching process.
  • the shape of the protective film used in the present invention may be any shape, but it is preferable to use a substantially rectangular shape because it can be easily incorporated into various display devices, particularly small electronic terminals.
  • the angle ⁇ 2 formed between the other orientation axis direction of the stretched resin film substrate and the side perpendicular to one side of the substrate is preferably 5 to 85 °, more preferably 15 to 75 °.
  • an angle ⁇ 1 formed by the side of the substantially rectangular protective film and one orientation axis direction of the biaxially stretched resin film substrate is 5 to 85 °
  • An angle ⁇ 2 formed by the other orientation axis direction of the biaxially stretched resin film substrate is set to 5 to 85 °.
  • ⁇ 1 and ⁇ 2 are angles on the narrow angle side among the angles formed by each side of the protective film and the alignment axis direction, and the alignment axis direction may be based on either.
  • ⁇ 2 is also in the above range by setting ⁇ 1 in the above range.
  • the biaxially stretched resin film can be stretched in any direction so that the orientation axes are not orthogonal to each other, but suitable strength and optical properties can be obtained by stretching the biaxially stretched resin film so that the orientation axes are substantially orthogonal. In order to easily obtain the characteristics, it is preferable that the biaxially stretched resin film has two orientation axes that are orthogonal in the plane.
  • the use of the protective film in which the sides of the protective film and the orientation axis directions do not coincide with each other in this way allows linearly polarized light from the image display module and the biaxially stretched resin film substrate used for the protective film.
  • the angles ⁇ 1 and ⁇ 2 formed by the orientation axis direction can be easily adjusted suitably.
  • the total thickness of the protective film used in the present invention is preferably 50 to 300 ⁇ m or less, more preferably 100 to 250 ⁇ m. By setting the thickness within this range, it is possible to achieve both prevention of damage to the panel and durability against impacts and reduction in the thickness of the image display device.
  • the protective film used in the present invention preferably has an adhesive layer on one side or both sides. By having the pressure-sensitive adhesive layer, it can be easily attached to the transparent panel of the image display device.
  • the protective film may have a hard coat layer on one side or both sides of the film substrate.
  • the total thickness of the protective film used in the present invention is 300 ⁇ m or less, preferably 50 to 300 ⁇ m, and more preferably 100 to 250 ⁇ m. By setting the thickness within this range, it is possible to achieve both prevention of damage to the panel and durability against impacts and reduction in the thickness of the image display device. In addition, it becomes easy to achieve both stamping accuracy and durability against damage to the panel and durability against impact.
  • the protective film of the present invention preferably has high transparency from the viewpoint of use in an image display device.
  • the total light transmittance in the visible light wavelength region of the protective film of the present invention is preferably 85% or more, more preferably 90% or more, haze of 1.0 or less, particularly preferably 0.5 or less.
  • the protective film has high transparency, and the display screen is easily refined.
  • biaxially stretched resin film substrate examples of the biaxially stretched resin film substrate used for the protective film include biaxially stretched polyethylene terephthalate, polycarbonate film, polypropylene film, and polyethylene naphthalate film.
  • a biaxially stretched polyethylene resin film such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) can be preferably used, and a polyethylene terephthalate film is particularly desirable.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • the substrate preferably has a total light transmittance of 85% or more.
  • the thickness of the substrate is preferably 25 to 200 ⁇ m, and more preferably 50 to 150 ⁇ m. By making the thickness within this range, it becomes easy to achieve both prevention of damage to the panel and durability against impacts and reduction in thickness of the image display device.
  • the protective film used for this invention should just have the said biaxially stretched resin film base material, and is fixed to a transparent panel via an adhesive or an adhesive agent.
  • a protective adhesive film having a configuration in which an adhesive layer is provided on one surface of a biaxially stretched resin film substrate is preferable because it can be easily attached to a transparent panel.
  • the pressure-sensitive adhesive layer it is preferable to use a pressure-sensitive adhesive layer having a thickness of 5 to 50 ⁇ m.
  • a pressure-sensitive adhesive layer having a thickness of 5 to 50 ⁇ m.
  • the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer known acrylic, rubber-based, and silicone-based pressure-sensitive resins can be used.
  • an acrylic copolymer containing a (meth) acrylic acid ester monomer having a C 2-14 alkyl group as a repeating unit as a main monomer component has transparency, light resistance and heat resistance. From the point of view, it is preferable.
  • (meth) acrylic acid ester monomer having 2 to 14 carbon atoms include ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, sec-butyl acrylate, t-butyl acrylate, n -Hexyl acrylate, cyclohexyl acrylate, n-octyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate, isononyl acrylate, isodecyl acrylate, lauryl acrylate, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate , Sec-butyl methacrylate, t-butyl methacrylate, n-hexyl methacrylate, cyclohexyl
  • a methacrylic acid alkyl ester monomer having an alkyl side chain having 4 to 9 carbon atoms or an acrylic acid alkyl ester monomer having an alkyl side chain having 4 to 9 carbon atoms is preferable, and the carbon number is More preferred are alkyl acrylate monomers having 4 to 9 alkyl side chains.
  • alkyl acrylate monomers having 4 to 9 alkyl side chains are particularly preferable.
  • the content of the (meth) acrylic acid ester monomer having 2 to 14 carbon atoms in the monomer constituting the acrylic copolymer used for the pressure-sensitive adhesive layer is preferably 60% by mass or more.
  • the content is more preferably at least mass%, more preferably from 90 to 99 mass%, particularly preferably from 90 to 96 mass%.
  • Acrylic copolymers further contain (meth) acrylic acid ester monomers and other vinyl monomers having polar groups such as hydroxyl, carboxyl and amino groups in the side chain as monomer components. It is preferable to do.
  • Examples of the monomer having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, hydroxypropyl (meth) acrylate, and caprolactone-modified (meth) acrylate.
  • Hydroxyl group-containing (meth) acrylates such as polyethylene glycol mono (meth) acrylate and polypropylene glycol (meth) acrylate can be used, among which 2-hydroxyethyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxy It is preferred to use hexyl (meth) acrylate as a copolymerization component.
  • acrylic acid methacrylic acid, itaconic acid, maleic acid, crotonic acid, (meth) acrylic acid dimer, ethylene oxide-modified succinic acid acrylate, etc.
  • acrylic acid dimer ethylene oxide-modified succinic acid acrylate, etc.
  • ethylene oxide-modified succinic acid acrylate etc.
  • copolymerization component it is preferable to use it as a copolymerization component.
  • Examples of the monomer having a nitrogen atom include N-vinyl-2-pyrrolidone, N-vinylcaprolactam, acryloylmorpholine, acrylamide, N, N-dimethylacrylamide, and 2- (perhydrophthalimido-N-yl) ethyl acrylate.
  • Amide group-containing vinyl monomers can be used, and among them, N-vinyl-2-pyrrolidone, N-vinylcaprolactam, and acryloylmorpholine are preferably used as copolymerization components.
  • vinyl monomers having a polar group include vinyl acetate, acrylonitrile, maleic anhydride, itaconic anhydride and the like.
  • the content of the monomer having a polar group is preferably 0.1 to 20% by weight of the monomer component constituting the acrylic copolymer, more preferably 1 to 13% by weight, More preferably, it is 1.5 to 8% by weight. By containing in the said range, it is easy to adjust the cohesive force, holding force, and adhesiveness of an adhesive to a suitable range.
  • a crosslinking agent to the pressure-sensitive adhesive.
  • a crosslinking agent an isocyanate type crosslinking agent, an epoxy type crosslinking agent, a chelate type crosslinking agent etc. are mentioned, for example.
  • the addition amount of the crosslinking agent is preferably adjusted so that the gel fraction of the pressure-sensitive adhesive layer is 30 to 90%. A more preferable gel fraction is 50 to 85%. Among these, 60 to 80% is most preferable. It becomes easy to suppress the fall of the surface pencil hardness when a protective adhesive film is affixed on a panel as a gel fraction is 30% or more. On the other hand, when the gel fraction is 90% or less, suitable adhesiveness can be easily obtained.
  • the gel fraction is expressed as a percentage of the original weight by measuring the weight after drying the insoluble content remaining after 24 hours of immersion in the adhesive layer after curing.
  • a tackifier resin may be added to improve the adhesive strength of the adhesive layer.
  • the tackifier resin to be added to the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tape of the present invention includes acrylic copolymers, rosin resins such as rosin and rosin esterified products; terpenes such as diterpene polymers and ⁇ -pinene-phenol copolymers Examples of such resins include: petroleum resins such as aliphatic (C5) and aromatic (C9); styrene resins, phenolic resins, xylene resins, and the like.
  • C5 aliphatic
  • C9 styrene resins
  • phenolic resins xylene resins
  • the addition amount of the tackifying resin when the pressure-sensitive adhesive resin is an acrylic copolymer, it is preferable to add 10 to 60 parts by weight with respect to 100 parts by weight of the acrylic copolymer. When importance is attached to adhesiveness, it is most preferable to add 20 to 50 parts by weight. Further, when the adhesive resin is a rubber-based resin, it is preferable to add 80 to 150 parts by weight of the tackifier resin to 100 parts by weight of the rubber-based resin. In general, when the adhesive resin is a silicone resin, no tackifying resin is added.
  • a silane coupling agent can be added in the range of 0.001 to 0.005.
  • plasticizers, softeners, fillers, pigments, flame retardants, and the like can be added.
  • the weight average molecular weight Mw of the acrylic copolymer used for the pressure-sensitive adhesive layer is preferably 400,000 to 1,400,000, and more preferably 600,000 to 1,200,000.
  • the weight average molecular weight Mw of the acrylic copolymer is within the above range, it is easy to secure a suitable adhesive force, and when a protective adhesive film is obtained, the load on the film surface can be relaxed suitably.
  • the weight average molecular weight Mw of the acrylic copolymer can be measured by gel permeation chromatography (GPC).
  • the said protective film it is also preferable to have a hard-coat layer on one surface of a biaxially stretched resin film base material.
  • a hard-coat layer By having a hard-coat layer, the damage prevention property to a transparent panel can be improved.
  • the hard coat layer preferably has a pencil hardness of F or more, more preferably H or more, It is especially preferable to set it as 3H or more. By setting the hardness to F or higher, the ability to prevent scratches on the transparent panel can be improved.
  • the hard coat layer is preferable because it is easy to produce by providing the hard coat layer on the surface opposite to the surface having the pressure-sensitive adhesive layer of the biaxially stretched resin film substrate, and the effect of suppressing scratches on the surface is easily obtained.
  • a hard coat layer is preferable because it has high transparency and does not contain a polarizing substance because it becomes easy to obtain suitable visibility.
  • the hard coat layer has high transparency or does not contain a polarizing substance because suitable visibility can be easily obtained.
  • the transparency of the hard coat layer the total light transmittance of the hard coat layer is 85%, preferably 90% or more.
  • the haze value is preferably 1.0 or less, and particularly preferably 0.5 or less.
  • the hard coat agent used in the hard coat layer is not particularly limited as long as it has the above-mentioned characteristics. However, since the hard coat layer can be easily formed, a hard coat comprising an active energy ray-curable resin composition is used. An agent can be preferably used. As such an active energy ray-curable resin composition, a polyfunctional acrylate resin composition is preferable, and a urethane acrylate hard coat agent is particularly preferable.
  • urethane acrylate-based hard coat agents include urethane, which is an addition reaction product of polyisocyanate (a1) and acrylate (a2) having one hydroxyl group and two or more (meth) acryloyl groups in one molecule.
  • a hard coat agent containing an acrylate (A) can be preferably used.
  • the urethane acrylate (A) has an ⁇ , ⁇ -unsaturation having a functional group capable of reacting with the reactive functional group in the (meth) acrylate polymer (b1) having a reactive functional group in the side chain. It is also preferred to use a polymer (B) having a (meth) acryloyl group obtained by reacting the compound (b2).
  • polyisocyanate (a1) examples include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylylene diisocyanate, 4,4′-diphenyl diisocyanate, 1,5-naphthalene diisocyanate, 4 Aromatic isocyanate compounds such as 4,4'-diphenylmethane diisocyanate; alicyclic hydrocarbons such as dicyclohexylmethane diisocyanate, isophorone diisocyanate, norbornane diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated methylene bisphenylene diisocyanate, and 1,4-cyclohexane diisocyanate.
  • Aromatic isocyanate compounds such as 4,4'-diphenylmethane diisocyanate
  • alicyclic hydrocarbons such as dicyclohexylmethane diisocyanate, isophorone diisocyanate,
  • alicyclic diisocyanate Compound having two bonded isocyanate groups
  • trimethylene diisocyanate hexamethylene diisocyanate
  • aliphatic diisocyanates Compounds having two isocyanate groups attached to aliphatic hydrocarbons sulfonates like
  • polyisocyanates (a1) aliphatic diisocyanates or alicyclic diisocyanates are preferable, and isophorone diisocyanate, norbornane diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated methylene bisphenylene diisocyanate and hexamethylene diisocyanate are particularly preferable.
  • norbornane diisocyanate is most preferable.
  • acrylate (a2) having one hydroxyl group and two or more (meth) acryloyl groups in one molecule for example, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta
  • examples include polyacrylates of polyhydric hydroxyl group-containing compounds such as (meth) acrylate, adducts of these polyacrylates with ⁇ -caprolactone, adducts of these polyacrylates with alkylene oxide, epoxy acrylates, etc. Can be mentioned.
  • These acrylates (a2) can be used alone or in combination of two or more.
  • acrylates (a2) acrylates having one hydroxyl group and 3 to 5 (meth) acryloyl groups in one molecule are preferable.
  • examples of such acrylates include pentaerythritol triacrylate, dipentaerythritol pentaacrylate, and the like, and these are particularly preferable because a cured film having high hardness can be obtained.
  • the urethane acrylate (A) used in the present invention is obtained by subjecting two components of the polyisocyanate (a1) and the acrylate (a2) to an addition reaction.
  • the ratio of the acrylate (a2) to the equivalent of isocyanate in the polyisocyanate (a1) is usually preferably 0.1 to 50, more preferably 0.1 to 10, and preferably 0.9 to 1.2 as the hydroxyl equivalent. Is more preferable.
  • the reaction temperature between the polyisocyanate (a1) and the acrylate (a2) is preferably 30 to 150 ° C., more preferably 50 to 100 ° C.
  • the blending amount of the urethane acrylate (A) in 100 parts by weight of the resin component in the resin composition is preferably 5 to 90 parts by weight, more preferably 10 to 70 parts by weight, and even more preferably 10 to 60 parts by weight. . If the blending amount of the urethane acrylate (A) is within this range, a cured film having a sufficiently high hardness can be obtained, and there is no coating film defect, excellent surface antifouling properties, and curing shrinkage is reduced. Curling of a film having a cured coating can also be reduced.
  • the molecular weight of the urethane acrylate (A) is preferably in the range of 500 to 1,500. When the molecular weight is within this range, a cured film having a sufficiently high hardness can be obtained and the curing shrinkage can be reduced, so that the curl of the film having the cured film can also be reduced.
  • the blending amount of the urethane acrylate (A) in 100 parts by weight of the resin component in the resin composition is preferably 5 to 90 parts by weight, more preferably 10 to 70 parts by weight, and even more preferably 10 to 60 parts by weight. . If the blending amount of the urethane acrylate (A) is within this range, a cured film having a sufficiently high hardness can be obtained, and there is no coating film defect, excellent surface antifouling properties, and curing shrinkage is reduced. Curling of a film having a cured coating can also be reduced.
  • the reactive functional group of the (meth) acrylate polymer (b1) having a reactive functional group in the side chain used in the present invention is preferably a hydroxyl group, a carboxyl group, an epoxy group or the like.
  • the functional group of the ⁇ , ⁇ -unsaturated compound (b2) capable of reacting with these reactive functional groups is preferably an isocyanate group, a carboxyl group, an acid halide group, a hydroxyl group, an epoxy group, or the like.
  • the (meth) acrylate polymer (b1) having a reactive functional group in the side chain was reacted with an ⁇ , ⁇ -unsaturated compound (b2) having a functional group capable of reacting with the reactive functional group.
  • the method for producing the polymer (B) having a (meth) acryloyl group is not particularly limited and can be produced by various methods.
  • the hard coat film used in the present invention can be produced by applying a hard coat agent on a film substrate and curing it.
  • Examples of methods for applying the hard coating agent to the film substrate include gravure coating, roll coating, comma coating, air knife coating, kiss coating, spray coating, transfer coating, dip coating, spinner coating, wheeler coating, brush coating, and silk. Examples thereof include a solid coat using a screen, a wire bar coat, and a flow coat. Also, printing methods such as offset printing and letterpress printing may be used. Among these, gravure coating, roll coating, comma coating, air knife coating, kiss coating, wire bar coating, and flow coating are preferable because a coating film having a more constant thickness can be obtained.
  • Curing of the hard coating agent may be appropriately performed according to the hard coating agent to be used, but when the active energy ray-curable resin composition is used as the hard coating agent, the activity of light, electron beam, radiation, etc. What is necessary is just to harden with an energy ray.
  • Specific energy sources or curing devices include, for example, germicidal lamps, ultraviolet fluorescent lamps, carbon arc, xenon lamps, high pressure mercury lamps for copying, medium or high pressure mercury lamps, ultrahigh pressure mercury lamps, electrodeless lamps, metal halide lamps, natural light, etc. Or an electron beam using a scanning type or curtain type electron beam accelerator.
  • ultraviolet rays are particularly preferable, and irradiation in an inert gas atmosphere such as nitrogen gas is preferable in terms of increasing the polymerization efficiency.
  • heat may be used as an energy source and heat treatment may be performed after curing with active energy rays.
  • the light source is a low pressure mercury lamp, high pressure mercury lamp, ultra high pressure mercury lamp, metal halide lamp, electrodeless lamp (fusion lamp), chemical lamp, black light. Lamp, mercury-xenon lamp, short arc lamp, helium / cadmium laser, argon laser, sunlight, LED, and the like.
  • a flashing xenon-flash lamp is used. This is preferable because the influence of heat can be reduced.
  • an angle ⁇ 1 formed by the polarization direction of linearly polarized light emitted from the image display unit and one orientation axis direction of the biaxially stretched resin film, And the angle ⁇ 2 formed by the polarization direction of the linearly polarized light emitted from the image display unit and the other orientation axis direction of the biaxially stretched resin film is 15 to 75 °.
  • an image display device provided with a transparent panel to which the protective film is attached is attached.
  • the polarization direction of linearly polarized light refers to an image display device having a transparent panel 2 on an upper part of an image display module 1 that emits linearly polarized light 3, and the transparent panel 2 covers the image display surface 4 on the surface of the image display device.
  • it refers to the polarization direction 5 (polarization axis) of the linearly polarized light 3 on the image display surface 4 (FIG. 2).
  • the polarization direction may be any direction, but when the image display unit has a substantially square shape, as described above, the angle ⁇ 1 formed by the polarization direction and the side of the image display unit or the polarization direction and the bottom side It is preferable that an angle ⁇ 2 formed by the above is 0 to 15 °.
  • the orientation axis direction of the biaxially stretched resin film used for the protective film is the direction of the orientation axis of the resin molecules when stretched in the film stretching process.
  • a protective film having a biaxially stretched resin film as a base material is formed into a desired shape, preferably a square shape, by punching or the like according to the mode of use.
  • the orientation axis direction in a protective film may be arbitrary directions. For example, in the case of a rectangular protective film, each side of the protective film 6 is aligned with each side of the protective film 6 even if the side of the protective film 6 is aligned with the alignment axis directions 7 and 8 (FIG. 3A). It may be a protective film (FIG. 3B) in which the axial directions 7 and 8 do not match (the arrow in FIG. 3 is the orientation axis direction during the production of the biaxially stretched resin film).
  • the protective film 6 (FIG. 3B) in which the sides of the protective film 6 do not coincide with the orientation axis directions 7 and 8 is a resin in the flow direction and the width direction of the resin film when the biaxially stretched resin film is manufactured.
  • a method of stretching the film and punching so that the orientation axis direction and the corners are not orthogonal or parallel at the time of punching, or when producing a biaxially stretched resin film, orthogonal to the flow direction and the width direction of the resin film Alternatively, it can be obtained by a method of stretching in a direction that is not parallel and punching according to the flow direction and the width direction.
  • the image display device of the present invention includes an angle ⁇ 1 formed by the polarization direction 5 of linearly polarized light emitted from the image display surface and one orientation axis direction of the biaxially stretched resin film on the surface of the image display surface, and image display
  • the angle ⁇ 2 formed by the polarization direction of the linearly polarized light emitted from the part and the other orientation axis direction of the biaxially stretched resin film is 15 to 75 °, preferably 25 to 65 °. Further, it is more preferably 35 to 55 °, and most preferably 40 to 50 °.
  • these ⁇ 1 and ⁇ 2 within the above ranges, visibility from all directions can be ensured easily and inexpensively even when polarized sunglasses are used.
  • ⁇ 1 and ⁇ 2 in the rectangular protective film are as shown in FIGS. 4 (a) and 4 (b).
  • the polarization direction 5 of the linearly polarized light emitted from the image display unit and the biaxially stretched resin The angle formed by one orientation axis direction 7 of the film is ⁇ 1, and the angle formed by the polarization direction 5 of linearly polarized light emitted from the image display unit and the other orientation axis direction 8 of the biaxially stretched resin film is ⁇ 2.
  • ⁇ 1 and ⁇ 2 are angles on the narrow angle side among the angles formed by the polarization direction and the alignment axis direction. Further, any orientation axis direction may be used as a reference.
  • the image display device may be configured such that each of ⁇ 1 and ⁇ 2 falls within the above range.
  • the protective film used in the image display device of the present invention is manufactured by an arbitrary manufacturing method, and the following manufacturing method can be exemplified as a particularly preferable manufacturing method. According to the following production method, a protective film that can be seen well when viewed through polarized sunglasses and that can prevent panel scattering and scratches can be easily and inexpensively produced.
  • An image display device having an image display module in which light emitted from an image display unit is linearly polarized light and a transparent panel provided on the image display module, and manufacturing a protective film to be attached to at least one surface of the transparent panel
  • the protective film is a protective film having a film base layer made of a biaxially stretched polyethylene resin film, The process of punching the original film of the protective film to obtain a substantially rectangular protective film,
  • the transparent panel with the protective film attached to the upper part of the image display module is provided in the substantially rectangular shape, the polarization axis of linearly polarized light emitted from the image display unit, and the film base layer
  • the angle ⁇ 1 formed by one of the alignment axes of the molecules of the film and the angle ⁇ 2 formed by the polarization axis of the linearly polarized light emitted from the image display unit and the other alignment axis of the molecules of the film substrate layer are 15 to 75 °.
  • a method for producing a protective film which is preferably a punch
  • the protective film is obtained by punching into a substantially rectangular shape from the original film of the protective film.
  • the protective film is made of a biaxially stretched polyethylene resin film, and is provided with a pressure-sensitive adhesive layer or hard coat layer as necessary. It may be in various forms used.
  • the manufactured protective film has a substantially square shape, and the substantially square shape has a rectangular shape such as a rectangular shape or a square shape as described above, and an arbitrary angle of the rectangular shape, preferably four corners. Includes shapes approximate to square shapes such as chamfered shapes.
  • the process of punching the protective film from the original fabric into a substantially square shape is the polarization of linearly polarized light emitted from the image display unit when a transparent panel with a protective film attached is provided on the top of the image display module.
  • the angle ⁇ 1 formed by the axis and one of the alignment axes of the molecules of the film substrate layer, and the angle ⁇ 2 formed by the polarization axis of the linearly polarized light emitted from the image display unit and the other alignment axis of the molecules of the film substrate layer Is a punching process of 15 to 75 °, preferably 20 to 70 °.
  • angles ⁇ 1 and ⁇ 2 formed by the polarization axis of linearly polarized light emitted from the image display unit of the image display device and the molecular orientation axis of the polyethylene-based resin film substrate layer of the protective film are preferably 30 to 60 °. 35 to 55 ° is more preferable, and 40 to 50 ° is most preferable.
  • ⁇ 1 and ⁇ 2 in the substantially rectangular protective film are as shown in FIGS. 4A and 4B, and the polarization direction 5 of the linearly polarized light emitted from the image display unit of the image display module on the image display surface 4 is shown.
  • the angle between one orientation axis direction 6 of the substrate layer of the protective film is ⁇ 1
  • the angle between the polarization direction 5 of the linearly polarized light emitted from the image display unit and the other orientation axis direction 7 is ⁇ 2. It is.
  • ⁇ 1 and ⁇ 2 are angles on the narrow angle side among the angles formed by the polarization direction and the alignment axis direction. Further, any axial direction may be used as a reference.
  • the above-described punching to the angles of ⁇ 1 and ⁇ 2 is a polyethylene-based resin film stretched biaxially in the protective film according to the polarization axis of linearly polarized light emitted from the image display unit of the image display device to be applied.
  • the punching angle is appropriately adjusted so that the orientation axis of the molecules of the base material layer becomes a desired angle after the punching.
  • the biaxially stretched polyethylene resin film used as the base material of the protective film is manufactured by stretching in the flow direction and the width direction at the time of film production, due to the bowing phenomenon during the stretching process, The orientation axis of the molecule is shifted with respect to the flow direction and the stretching direction in the width direction. Therefore, the punching process is performed at a punching angle corresponding to the shift in the stretching direction of the orientation axes of the molecules in the polyethylene-based resin film, depending on the punching position of the original film of the protective film.
  • the molecular orientation axis in the width direction exists at an angle shifted from 0 to 45 ° from the stretch direction. For this reason, the protective film original fabric using the biaxially stretched polyethylene resin film as a base material layer is subjected to a punching process by appropriately adjusting a punching angle in the width direction. A protective film having ⁇ 2 can be obtained.
  • FIG. 5 shows an example of a raw film of a protective film using a biaxially stretched polyethylene resin film stretched in the flow direction and the width direction as a base material layer.
  • the biaxially stretched polyethylene resin film in the original film 10 of the protective film is stretched in the stretching direction 11 in the flow direction and the stretching direction 12 in the width direction, and with respect to the stretching direction 12 in the width direction,
  • the molecular orientation axis 13 of the biaxially stretched polyethylene resin film has a shift angle ⁇ from the stretch direction 12 at each position in the width direction.
  • the molecular orientation axis 13 in the width direction is the orientation axis at the position where the punching process is performed, and is preferably based on the orientation axis at the center position of the substantially square shape after the punching process.
  • the punching angle from the protective film original fabric is the angle formed by the stretching direction in the width direction of the biaxially stretched polyethylene resin film of the protective film raw material and one side of the substantially rectangular shape to be punched. It is preferably a punching process of ⁇ 30 ° of the optimum punching angle ⁇ represented by the formula (1), more preferably a punching process of ⁇ 25 °, further preferably ⁇ ⁇ 15 °, Most preferably, it is within ⁇ ⁇ 5 °.
  • ⁇ ⁇ [( ⁇ 45 °) ⁇ ] + (90 ° ⁇ n) (1)
  • ⁇ is an angle formed by the horizontal axis of the image display unit and the polarization axis of linearly polarized light emitted from the image display unit
  • ⁇ is a biaxially stretched polyethylene-based protective film raw material.
  • the angle formed by the stretching direction in the width direction of the resin film and the molecular orientation axis in the width direction of the polyethylene-based resin film of the original protective film, n is an integer of -3 to 3.
  • the horizontal axis of the image display unit indicates the horizontal axis when the image display unit is viewed when the image is displayed.
  • the image display unit has a substantially square shape, the upper side or the lower side thereof A parallel axis. 6A or 6B, the angle ⁇ formed by the horizontal axis 22 of the image display unit 21 and the polarization axis 23 of the linearly polarized light emitted from the image display unit is the image display unit. Is an angle in the counterclockwise direction from the horizontal axis of the image display unit to the polarization axis of the linearly polarized light, and 0 ° ⁇ ⁇ ⁇ 180 °.
  • the angle ⁇ between the stretching direction in the width direction of the biaxially stretched polyethylene resin film of the original protective film and the molecular orientation axis in the width direction in the polyethylene resin film of the protective film original is the polyethylene resin. It is a shift angle of molecules with respect to the stretching direction in the width direction of the film. Since ⁇ is a shift angle, as shown in FIG. 7, from the stretching direction 12 in the width direction of the polyethylene resin film to the molecular orientation axis 13 in the width direction of the polyethylene resin film at an arbitrary point.
  • the counterclockwise angle ( ⁇ 1) is a positive angle
  • the clockwise angle ( ⁇ 2) from the stretching direction 12 in the width direction of the film to the molecular orientation axis 13 in the width direction of the polyethylene resin film at an arbitrary point. ) Is a negative angle.
  • the angle between the width direction and the alignment axis in the width direction is within 45 °, it can be expressed as ⁇ 45 ° ⁇ ⁇ ⁇ 0 ° or 0 ° ⁇ ⁇ ⁇ 45 °.
  • the transparent panel on the image display module side It is installed on the surface opposite to the surface so that the surface of the punched protective film is a surface layer.
  • the said protective film when applying the said protective film to the surface at the side of the image display module of a transparent panel, what is necessary is just to install so that the back surface side of the cut-out protective film may become a table
  • the angle formed by the stretching direction in the width direction of the biaxially stretched polyethylene resin film of the original film of the protective film and one side of the substantially rectangular shape to be punched is expressed by the following formula (2): It is preferably a punching process of ⁇ 30 ° of the optimum cutting process angle ⁇ represented, and more preferably a punching process at a punching angle of ⁇ 25 °.
  • ⁇ [( ⁇ 45 °) + ⁇ ] + (90 ° ⁇ n) (2)
  • ⁇ is an angle formed by the horizontal axis of the image display unit and the polarization axis of linearly polarized light emitted from the image display unit
  • ⁇ is a biaxially stretched polyethylene-based protective film raw material.
  • the angle formed by the width direction of the resin film and the orientation axis in the width direction of the polyethylene film of the protective film, n is an integer of -3 to 3.
  • the punching angle ⁇ ⁇ 15 ° is more preferable, and it is most preferably within ⁇ 5 °.
  • the optimum punching angles ⁇ and ⁇ are formed in a width direction of the biaxially stretched polyethylene resin film 12 of the original film 10 of the protective film and a substantially rectangular shape to be punched.
  • the counterclockwise angle ( ⁇ 1) from the stretching direction in the width direction of the film to one side of the substantially rectangular protective film 14 to be punched is defined as a positive angle.
  • a clockwise angle from the width direction to one side of the substantially rectangular protective film 15 to be punched is defined as a negative angle ( ⁇ 2).
  • One side of the substantially square shape to be punched is an arbitrary side. Although it may be, it is preferable to use the side which becomes the side of the image display visually recognized when provided in the image display unit of the image display device as a reference. Further, it is preferable to perform the punching process so that the center point of the substantially square shape to be punched coincides with the point for confirming the orientation axis in the width direction of the polyethylene-based resin film because the punching process can be performed with high accuracy.
  • the angle ⁇ of the orientation axis in the width direction of the protective film raw material in the present invention, the punching angles ⁇ , ⁇ are angles when the protective film raw material is viewed from the surface side, for example, a protective film having an adhesive layer on one side If so, it means the angle when the film is viewed from the side opposite to the pressure-sensitive adhesive layer.
  • the stretching direction in the width direction of the biaxially stretched polyethylene resin film in the original film of the protective film It is particularly preferable to perform the substantially square-shaped punching process at an angle other than the range of ⁇ 5 ° to 5 ° with respect to the side of the substantially square shape to be processed because the effect of the present invention is high.
  • the punching process into a substantially square shape may be any punching process such as a punching process with a substantially square-shaped cutting blade having a desired size or a laser punching process.
  • the punching with the punching blade is preferable because it is easy to adjust the angle of the punching blade.
  • the size of the protective film that is punched into a substantially square shape may be adjusted as appropriate according to the size suitable for the image display unit of the image display device to be applied.
  • the size is preferably adapted to a portable electronic device having an image display portion of 5 to 16 inches, preferably 3.5 to 12.1 inches.
  • the size of the protective film suitable for the portable electronic device is preferably 3.5 to 16 inches diagonal, more preferably 3.5 to 12.1 inches diagonal.
  • an isocyanate-based cross-linking agent (Coronate HL solid content 75% manufactured by Nippon Polyurethane Co., Ltd.) was added and stirred with a stirrer for 20 minutes to obtain an adhesive composition. .
  • the protective film was prepared as follows using the said adhesive composition.
  • ⁇ Preparation of protective film A> The pressure-sensitive adhesive composition prepared by the above method was applied to one side of a biaxially stretched polyethylene terephthalate film (Cosmo Shine A4100 manufactured by Toyobo Co., Ltd.) having a thickness of 100 ⁇ m and orthogonal to each orientation axis, and dried at 90 ° C. for 90 seconds.
  • a protective film A having a pressure-sensitive adhesive layer having a thickness of 10 ⁇ m after drying was obtained.
  • ⁇ Preparation of protective film B> A pressure-sensitive adhesive composition prepared by the above method was applied to one side of a biaxially stretched polyethylene terephthalate film (Cosmo Shine A4100 manufactured by Toyobo Co., Ltd.) having a thickness of 50 ⁇ m and orthogonal to each orientation axis, and dried at 90 ° C. for 90 seconds.
  • ⁇ Preparation of protective film C> The pressure-sensitive adhesive composition prepared by the above method was applied to one side of a 100 ⁇ m thick biaxially stretched polyethylene naphthalate film (Teonex manufactured by Teijin DuPont Co., Ltd.) with each orientation axis orthogonal, and dried at 90 ° C. for 90 seconds. A protective film C having an adhesive layer having a thickness of 10 ⁇ m after drying was obtained.
  • ⁇ Preparation of protective film D> The pressure-sensitive adhesive composition prepared by the above method was applied to one side of an unstretched polycycloolefin polymer film having a thickness of 100 ⁇ m (ZEONOR film manufactured by Nippon Zeon Co., Ltd.) and dried at 90 ° C. for 90 seconds.
  • the protective film D which has a 10 micrometer adhesive layer was obtained.
  • ⁇ Preparation of protective film E> A pressure-sensitive adhesive composition prepared by the above method was applied to one side of a 50 ⁇ m-thick unstretched acrylic film (Acryprene manufactured by Mitsubishi Rayon Co., Ltd.), dried at 90 ° C. for 90 seconds, and a thickness of 10 ⁇ m after drying. The protective film E which has this was obtained.
  • a protective film A cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film A is bonded together and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 45 °.
  • the image display apparatus was manufactured by fixing at an angle.
  • a protective film A cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film A is bonded together and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 30 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film A cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film A is bonded together and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 60 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film A cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film A is bonded together and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 15 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film A cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film A is bonded together and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 75 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film B cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film B is bonded, and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 45 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film B cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film B is bonded, and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 30 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film B cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film B is bonded, and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 60 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film C cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film C is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PEN film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 45 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film C cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film C is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PEN film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 30 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film C cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film C is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PEN film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 60 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film A cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film A is bonded together and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • an angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 90 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film A cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film A is bonded together and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part. At this time, on the glass panel surface (image display surface surface), the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module becomes 0 °. An image display device was manufactured by fixing at an angle.
  • a protective film B cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film B is bonded, and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • an angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 90 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film B cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film B is bonded, and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part. At this time, on the glass panel surface (image display surface surface), the angle formed by one orientation axis direction of the PET film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module becomes 0 °. An image display device was manufactured by fixing at an angle.
  • a protective film C cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film C is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the angle formed by one orientation axis direction of the PEN film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module is 90 °.
  • An image display device was manufactured by fixing at an angle.
  • a protective film C cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film C is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part. At this time, on the glass panel surface (image display surface surface), the angle formed by one orientation axis direction of the PEN film as the base material of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module becomes 0 °. An image display device was manufactured by fixing at an angle.
  • a protective film D cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film D is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 45 °.
  • a protective film D cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film D is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 30 °.
  • a protective film D cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film D is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 60 °.
  • a protective film D cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film D is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film and the linearly polarized light emitted from the liquid crystal module to 90 °.
  • a protective film D cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel includes a glass panel in which the protective film D is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 0 °.
  • a protective film E cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel is composed of a glass panel in which the protective film E is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 45 °.
  • a protective film E cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel is composed of a glass panel in which the protective film E is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 30 °.
  • a protective film E cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel is composed of a glass panel in which the protective film E is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 60 °.
  • a protective film E cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel is composed of a glass panel in which the protective film E is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film and the linearly polarized light emitted from the image display unit of the liquid crystal module to 90 °.
  • a protective film E cut out in a rectangular shape is bonded to one surface of a transparent glass panel, and the glass panel is composed of a glass panel in which the protective film E is bonded and a liquid crystal module in which light emitted from the image display unit is linearly polarized light. It fixed so that it might be located in the upper part.
  • the image display device was manufactured by fixing the angle ⁇ formed by the side of the protective film at this time and the linearly polarized light emitted from the image display unit of the liquid crystal module to be 0 °.
  • An image display device was manufactured by fixing a transparent glass panel and a liquid crystal module in which light emitted from the image display unit is linearly polarized so that the glass panel is positioned on the upper part.
  • FIG. 10 shows the result of confirming the visibility of the image display device of Example 1
  • FIG. 11 shows the result of confirming the visibility in the region where the luminance is lowered in the image display device of Example 3, and Comparative Example 1
  • FIG. 10 shows the result of confirming the visibility of the image display device of Example 1
  • FIG. 11 shows the result of confirming the visibility in the region where the luminance is lowered in the image display device of Example 3, and Comparative Example 1
  • FIGS. 6 to 8 are images on the image display unit.
  • X The image becomes dark in a part of the rotation region, and the image is hardly visible in the region.
  • the protective film attached to the glass panel is a protective film based on a biaxially stretched resin film, and both the angles ⁇ 1 and ⁇ 2 are 15 to 75 °.
  • the image display devices of Examples 1 to 11 can improve the strength of the glass panel, prevent the glass from being scattered when cracks occur, and can view the image satisfactorily when viewed through the polarizing plate. .
  • a urethane acrylate (UA1) / PE4A mixture (a mixture of 80/20 by weight, non-volatile) 80% by weight butyl acetate solution).
  • the molecular weight of urethane acrylate (UA1) was 818.
  • the reaction solution was bubbled with air, heated to 110 ° C., and reacted for 8 hours. Thereafter, 1.4 parts by weight of p-methoxyphenol was added, and after cooling to room temperature, MIBK was added so that the nonvolatile content was 50% by weight to obtain the above polymer (MIBK solution having a nonvolatile content of 50% by weight). .
  • the weight average molecular weight of the obtained polymer was 31,000 (in terms of polystyrene by GPC), and the (meth) acryloyl group equivalent was 300 g / eq.
  • ethyl acetate 40.0 parts by weight of a butyl acetate solution (non-volatile content 80%) of a urethane acrylate (UA1) / PE4A mixture (a mixture of 80/20 by weight), a MIBK solution (non-volatile content) of the above polymer 50%) 64.0 parts by weight, dipentaerythritol hexaacrylate (hereinafter referred to as “DPHA”) 16.0 parts by weight, photoinitiator 1-hydroxycyclohexyl phenyl ketone (hereinafter referred to as “HCPK”) 1.63 Part by weight, 1.16 parts by weight of photoinitiator diphenyl-2,4,6-trimethylbenzoylphosphine oxide (hereinafter referred to as “TPO”) are uniformly mixed to prepare a resin composition (non-volatile content: 65%). did.
  • DPHA dipentaerythritol hexaacrylate
  • HCPK photo
  • OPTOOL DAC reactive fluorine antifouling agent
  • a protective film original fabric was prepared as follows.
  • ⁇ Preparation of protective film F> On one side of a 100 ⁇ m-thick biaxially stretched polyethylene terephthalate film (Cosmo Shine A4100 manufactured by Toyobo Co., Ltd.) having an angle ⁇ of ⁇ 30 ° formed by the width direction of the original film and the orientation axis in the width direction in the film, After applying the hard coating agent (A) prepared above and drying at 60 ° C.
  • an ultraviolet irradiation apparatus (“F450” manufactured by Fusion UV Systems Japan Co., Ltd., lamp: 120 W / cm, H bulb) ) was used to irradiate ultraviolet rays at an irradiation light amount of 0.5 J / cm 2 to form a hard coat layer having a thickness of 10 ⁇ m.
  • the pressure-sensitive adhesive (a) was applied to the surface of the hard coat film opposite to the hard coat layer so that the thickness of the pressure-sensitive adhesive layer after drying was 10 ⁇ m, and dried at 85 ° C. for 2 minutes.
  • a 38 ⁇ m thick polyester film (hereinafter referred to as # 38 release film) having one surface peeled off with a silicone compound was bonded to the obtained pressure-sensitive adhesive layer surface and aged at 40 ° C. for 2 days to produce a protective film original fabric F having a total thickness of 158 ⁇ m. Obtained.
  • ⁇ Preparation of protective film G> On one side of a 100 ⁇ m-thick biaxially stretched polyethylene terephthalate film (Cosmo Shine A4100 manufactured by Toyobo Co., Ltd.) having an angle ⁇ of 0 ° between the width direction of the original film and the orientation axis in the width direction in the film, After applying the hard coating agent (A) prepared in step 1 and drying at 60 ° C.
  • an ultraviolet irradiation device in an air atmosphere (“F450” manufactured by Fusion UV Systems Japan Co., Ltd., lamp: 120 W / cm, H bulb) was used to irradiate ultraviolet rays at an irradiation light amount of 0.5 J / cm 2 to form a hard coat layer having a thickness of 10 ⁇ m.
  • the pressure-sensitive adhesive (a) was applied to the surface of the hard coat film opposite to the hard coat layer so that the thickness of the pressure-sensitive adhesive layer after drying was 10 ⁇ m, and dried at 85 ° C. for 2 minutes.
  • a 38 ⁇ m thick polyester film (hereinafter referred to as “# 38 release film”) having one surface peeled off with a silicone compound was bonded to the obtained pressure-sensitive adhesive layer surface, and aged at 40 ° C. for 2 days to produce a protective film original fabric G having a total thickness of 158 ⁇ m. Obtained.
  • ⁇ Preparation of protective film original fabric H> On one side of a 100 ⁇ m-thick biaxially stretched polyethylene terephthalate film (Cosmo Shine A4100 manufactured by Toyobo Co., Ltd.) having an angle ⁇ of 20 ° formed by the width direction of the original film and the orientation axis in the width direction in the film, After applying the hard coating agent (A) prepared in step 1 and drying at 60 ° C.
  • an ultraviolet irradiation device in an air atmosphere (“F450” manufactured by Fusion UV Systems Japan Co., Ltd., lamp: 120 W / cm, H bulb) was used to irradiate ultraviolet rays at an irradiation light amount of 0.5 J / cm 2 to form a hard coat layer having a thickness of 10 ⁇ m.
  • the pressure-sensitive adhesive (a) was applied to the surface of the hard coat film opposite to the hard coat layer so that the thickness of the pressure-sensitive adhesive layer after drying was 10 ⁇ m, and dried at 85 ° C. for 2 minutes.
  • a 38 ⁇ m thick polyester film (hereinafter referred to as # 38 release film) having one surface peeled off with a silicone compound was bonded to the obtained pressure-sensitive adhesive layer surface and aged at 40 ° C. for 2 days to produce a protective film original fabric H having a total thickness of 158 ⁇ m. Obtained.
  • ⁇ Preparation of protective film I> On one side of a 100 ⁇ m-thick biaxially stretched polyethylene naphthalate film (Teonex manufactured by Teijin DuPont) with an angle ⁇ formed by the width direction of the original film and the orientation axis in the width direction of the film being 0 °, After applying the hard coating agent (A) prepared in step 1 and drying at 60 ° C. for 90 seconds, an ultraviolet irradiation device in an air atmosphere (“F450” manufactured by Fusion UV Systems Japan Co., Ltd., lamp: 120 W / cm, H bulb) was used to irradiate ultraviolet rays at an irradiation light amount of 0.5 J / cm 2 to form a hard coat layer having a thickness of 10 ⁇ m.
  • F450 manufactured by Fusion UV Systems Japan Co., Ltd., lamp: 120 W / cm, H bulb
  • the pressure-sensitive adhesive (a) was applied to the surface of the hard coat film opposite to the hard coat layer so that the thickness of the pressure-sensitive adhesive layer after drying was 10 ⁇ m, and dried at 85 ° C. for 2 minutes.
  • a 38 ⁇ m-thick polyester film (hereinafter referred to as # 38 release film) with one side peel-treated with a silicone compound was bonded to the obtained pressure-sensitive adhesive layer surface, and aged at 40 ° C. for 2 days to produce a protective film original fabric I with a total thickness of 158 ⁇ m. Obtained.
  • the hard coating agent (A) prepared above was applied to one side of a 125 ⁇ m thick unstretched acrylic film (Acryprene manufactured by Mitsubishi Rayon Co., Ltd.), dried at 60 ° C. for 90 seconds, and then irradiated with an ultraviolet irradiation device (fusion) in an air atmosphere.
  • a “F450” manufactured by UV Systems Japan, Inc. a lamp: 120 W / cm, an H bulb, ultraviolet rays were irradiated at an irradiation light amount of 0.5 J / cm 2 to form a hard coat layer having a thickness of 10 ⁇ m.
  • the pressure-sensitive adhesive (a) was applied to the surface of the hard coat film opposite to the hard coat layer so that the thickness of the pressure-sensitive adhesive layer after drying was 10 ⁇ m, and dried at 85 ° C. for 2 minutes.
  • a 38 ⁇ m thick polyester film (hereinafter referred to as # 38 release film) having one surface peeled with a silicone compound was bonded to the obtained pressure-sensitive adhesive layer surface, and aged at 40 ° C. for 2 days to produce a protective film original fabric J having a total thickness of 183 ⁇ m. Obtained.
  • Example 12 The protective film original fabric F was punched so that the film punching angle (angle formed by the width direction of the film original fabric and one side of the rectangular shape to be punched) was ⁇ 10 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 13> The protective film original fabric F was punched so that the punching angle was 0 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 14> The protective film original fabric F was punched so that the punching angle was 15 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 15 The protective film original fabric F was punched so that the punching angle was 30 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 16> The protective film original fabric F was punched so that the punching angle was 40 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 17 The protective film original fabric G was punched so that the punching angle was 45 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 18 The protective film original fabric H was punched so that the punching angle was 65 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 19 The protective film original fabric F was punched so that the punching angle was ⁇ 15 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 30 ° were fixed so that the protective film was positioned on the top.
  • Example 20> The protective film original fabric G was punched so that the punching angle was 15 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 30 ° were fixed so that the protective film was positioned on the top.
  • Example 21 The protective film original fabric H was punched so that the punching angle was 35 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 30 ° were fixed so that the protective film was positioned on the top.
  • Example 22> The protective film original fabric F was punched so that the punching angle was 35 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 160 ° were fixed so that the protective film was positioned on the top.
  • Example 23 The protective film original fabric G was punched so that the punching angle was 65 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 160 ° were fixed so that the protective film was positioned on the top.
  • Example 24 The protective film original fabric H was punched so that the punching angle was 85 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 160 ° were fixed so that the protective film was positioned on the top.
  • Example 25 The protective film original fabric I was punched so that the punching angle was 20 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 26 The protective film original fabric I was punched so that the punching angle was 45 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • Example 27 The protective film original fabric I was punched so that the punching angle was 65 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • the protective film original fabric F was punched so that the punching angle was ⁇ 30 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • the protective film original fabric F was punched so that the punching angle was ⁇ 20 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • the protective film original fabric F was punched so that the punching angle was 50 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • the protective film original fabric F was punched so that the punching angle was 65 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • the protective film original fabric I was punched so that the punching angle was 0 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • the protective film original fabric I was punched so that the punching angle was 90 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • ⁇ Comparative Example 25> The protective film original fabric J was punched so that the punching angles were 0, ⁇ 20, ⁇ 45, ⁇ 70, and ⁇ 90 ° to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 0 ° were fixed so that the protective film was positioned on the top.
  • the protective film original fabric J was punched so that the punching angle was 0, 20, 45, 70, and 90 ° clockwise to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 30 ° were fixed so that the protective film was positioned on the top.
  • ⁇ Comparative Example 27> The protective film original fabric J was punched so that the punching angle was 0, ⁇ 20, ⁇ 45, ⁇ 70, and ⁇ 90 ° counterclockwise to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 30 ° were fixed so that the protective film was positioned on the top.
  • ⁇ Comparative Example 28> The protective film original fabric J was punched so that the punching angle was 0, 20, 45, 70, and 90 ° clockwise to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 160 ° were fixed so that the protective film was positioned on the top.
  • ⁇ Comparative Example 29> The protective film original fabric J was punched so that the punching angle was 0, ⁇ 20, ⁇ 45, ⁇ 70, and ⁇ 90 ° counterclockwise to obtain a protective film.
  • This protective film was bonded to one surface of a transparent rectangular glass panel, and the glass panel and a liquid crystal module having a polarization axis angle ⁇ of 160 ° were fixed so that the protective film was positioned on the top.
  • FIG. 9 shows the visibility of the image emitted from the image display device.
  • the evaluation criteria were as follows. The evaluation results are shown in Tables 4-7. Further, FIG. 13 shows the result of confirming the visibility of the image display device of Example 12, FIG. 14 shows the result of confirming the visibility in the region where the brightness is lowered in the image display device of Example 14, and Comparative Example 18 FIG.
  • FIGS. 13 to 15 shows the result of confirming the visibility in the area where the image becomes dark in the image display apparatus of FIG.
  • the cursors in FIGS. 13 to 15 are images on the image display unit.
  • ⁇ There is a region where the luminance falls in a part of the rotation region, and a slight darkness is felt in the region, but the image visibility is practical in the entire rotation region.
  • Glass panel scattering prevention The evaluation of the glass scattering prevention property was performed based on the three-point bending test method of JIS R1601 standard.
  • the evaluation criteria for glass scattering were as follows. ⁇ : No glass fragments scattered ⁇ : Glass fragments scattered
  • the protective film was affixed to a glass plate having a thickness of 0.5 mm, a length of 50 mm, and a width of 40 mm, and then fixed by performing heat and pressure treatment at 5 atm, 50 ° C. for 20 minutes.
  • the total light transmittance and haze were measured based on JIS K7105 and JIS K7136 of samples using “HR-100 Model” manufactured by Murakami Color Research Laboratory.
  • the protective film produced by the production method of the present invention was able to realize suitable visibility while having good protective performance as a protective film.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Dans la présente invention, une image peut être visible de manière favorable même à travers une paire de lunettes de soleil polarisantes, dans un appareil d'affichage d'image dans lequel un film de protection d'un panneau transparent est un film de protection dont le matériau de base est un film en résine orienté de manière biaxiale, et à la fois l'angle (θ1) entre la direction de polarisation d'une lumière polarisée de manière linéaire pour émerger à partir d'une unité d'affichage d'image et la direction d'un axe d'orientation du film en résine orienté de manière biaxiale, et l'angle (θ2) entre la direction de polarisation de la lumière polarisée de manière linéaire pour émerger à partir de l'unité d'affichage d'image et la direction de l'autre axe d'orientation du film en résine orienté de manière biaxiale sont compris dans une plage de 15° à 75° à la surface du module d'affichage d'image.
PCT/JP2012/067274 2011-07-07 2012-07-06 Appareil d'affichage d'image, film de protection et procédé de fabrication d'un film de protection WO2013005821A1 (fr)

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KR1020147003273A KR20140045543A (ko) 2011-07-07 2012-07-06 화상 표시 장치, 보호 필름 및 보호 필름의 제조 방법
CN201280043470.5A CN103782229A (zh) 2011-07-07 2012-07-06 图像显示装置、保护膜和保护膜的制造方法

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JP2011-150837 2011-07-07
JP2011150837A JP2013019941A (ja) 2011-07-07 2011-07-07 画像表示装置及び保護フィルム
JP2012053029A JP2013185121A (ja) 2012-03-09 2012-03-09 保護フィルムの製造方法及び保護フィルム
JP2012-053029 2012-03-09

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JP7389656B2 (ja) * 2019-02-08 2023-11-30 日東電工株式会社 画像表示装置およびその製造方法

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