WO2015060275A1 - Corps stratifié - Google Patents

Corps stratifié Download PDF

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Publication number
WO2015060275A1
WO2015060275A1 PCT/JP2014/077891 JP2014077891W WO2015060275A1 WO 2015060275 A1 WO2015060275 A1 WO 2015060275A1 JP 2014077891 W JP2014077891 W JP 2014077891W WO 2015060275 A1 WO2015060275 A1 WO 2015060275A1
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WO
WIPO (PCT)
Prior art keywords
layer
polymer
retardation
transparent conductive
conductive layer
Prior art date
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PCT/JP2014/077891
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English (en)
Japanese (ja)
Inventor
彩美 中藤
由紀 長谷川
祥一 松田
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日東電工株式会社
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Publication of WO2015060275A1 publication Critical patent/WO2015060275A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display

Definitions

  • the present invention relates to a laminate.
  • a touch panel is frequently used as an input device, and a touch panel that can be operated by directly touching with a finger is known as the touch panel.
  • the operation of the touch panel is an operation of touching a flat and smooth operation surface, and thus a certain input feeling cannot be obtained like a keyboard input device. Therefore, a technique for introducing a so-called tactile feedback sensor into the touch panel, which feeds back a tactile sensation when an operator touches the operation surface, has been studied.
  • a touch panel in which an operation surface vibrates when touched by an operator is practically used.
  • a technology that controls the charge on the operation surface of the touch panel and gives a tactile sensation to the operator with an electric sense has been proposed (for example, Patent Document 1).
  • a touch panel having a tactile feedback function as described above can be applied to an image display device including a polarizing plate such as a liquid crystal display device.
  • a polarizing plate such as a liquid crystal display device.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is a laminate including a predetermined transparent conductive layer to provide a tactile feedback function, and an image display including a polarizing plate.
  • an apparatus it is providing the laminated body which can contribute to the improvement of the visibility through a polarizing lens.
  • the laminate of the present invention comprises a retardation layer and a transparent conductive layer disposed on one side or both sides of the retardation layer, and the front retardation at a wavelength of 590 nm of the retardation layer is 90 nm to 190 nm.
  • the surface resistance value of the transparent conductive layer is greater than 10 3 ⁇ / ⁇ and 10 12 ⁇ / ⁇ or less.
  • the transparent conductive layer includes a conductive polymer.
  • the conductive polymer is at least one selected from the group consisting of a polyacetylene polymer, a polyparaphenylene polymer, a polyaniline polymer, a polythiophene polymer, a polyparaphenylene vinylene polymer, and a polypyrrole polymer. It is.
  • the laminated body of the present invention further includes a hard coat layer disposed on the opposite side of the transparent conductive layer from the retardation layer.
  • the laminated body of this invention is further equipped with the adhesive layer arrange
  • the laminated body of this invention is equipped with the said adhesive layer, the said phase difference layer, the said transparent conductive layer, and the said hard-coat layer in this order.
  • a display device including a touch panel including a tactile feedback sensor and a polarizing plate by including a retardation layer having a specific front phase difference and a transparent conductive layer having a specific surface resistance value.
  • a retardation layer having a specific front phase difference
  • a transparent conductive layer having a specific surface resistance value
  • FIG. 1 is a schematic cross-sectional view of a laminate according to one embodiment of the present invention.
  • the laminate 110 of the present invention includes a retardation layer 10 and a transparent conductive layer 20 disposed on one side or both sides (one side in the illustrated example) of the retardation layer 10.
  • the retardation layer may be a single layer or a multilayer.
  • the single-layer retardation layer can be composed of a single retardation film.
  • the multilayer retardation layer is composed of a plurality of retardation films. When using a plurality of retardation films, the same retardation film may be used or different retardation films may be used.
  • the laminate of the present invention is applied to, for example, an image display device including a polarizing plate.
  • the laminate of the present invention can be used as a member of a tactile feedback sensor.
  • the laminate is used as a member of a tactile feedback sensor provided in the touch panel. It is done.
  • the tactile feedback sensor means a sensor that is provided in the touch panel and is provided to feed back the tactile sensation when the operator touches the touch panel.
  • FIG. 2 is a schematic cross-sectional view of a laminate according to another embodiment of the present invention.
  • the stacked body 110 ′ shown in FIG. 2 further includes a hard coat layer 30.
  • the hard coat layer 30 is disposed on the opposite side of the transparent conductive layer 20 from the retardation layer 10.
  • the laminate of the present invention further comprises an adhesive layer.
  • the pressure-sensitive adhesive layer can be provided on the outermost side of the laminate.
  • the laminate of the present invention can include an adhesive layer, a retardation layer, and a transparent conductive layer in this order.
  • the laminated body of this invention can be equipped with the adhesive layer 40, the phase difference layer 10, the transparent conductive layer 20, and the hard-coat layer 30 in this order, for example, as shown in FIG.
  • the total light transmittance of the laminate of the present invention is preferably 80% or more, more preferably 85% or more, and particularly preferably 90% or more.
  • the retardation layer can function as a so-called ⁇ / 4 plate.
  • ⁇ / 4 plate refers to a plate having a function of converting linearly polarized light having a specific wavelength into circularly polarized light (or circularly polarized light into linearly polarized light).
  • the front retardation R 0 of the retardation layer at a wavelength of 590 nm is 90 nm to 190 nm, preferably 100 nm to 180 nm, and more preferably 110 nm to 170 nm.
  • the front phase difference R 0 when applied to an image display device including a touch panel having a tactile feedback sensor and a polarizing plate, light transmitted through the polarizing plate can be converted into circularly polarized light. it can.
  • Such a laminated body can contribute to the improvement of visibility when the polarizing lens is interposed in the image display device. More specifically, by using the laminate of the present invention, it is possible to provide an image display device that can be visually recognized even when a polarizing lens is interposed, and in which unnecessary coloring, color unevenness, and the like are difficult to be visually recognized. be able to.
  • the front phase difference R 0 is the refractive index in the direction in which the in-plane refractive index is maximum (that is, the slow axis direction) at 23 ° C., and the slow axis in the plane is nx.
  • R 0 (nx ⁇ ny) ⁇ d, where ny is the refractive index in the orthogonal direction (that is, the fast axis direction) and d (nm) is the thickness of the retardation film.
  • the retardation film exhibits any suitable refractive index ellipsoid as long as it has a relationship of nx> ny.
  • the refractive index ellipsoid of the retardation film shows a relationship of nx>nz> ny or nx> ny ⁇ nz.
  • the thickness of the retardation layer is preferably 200 ⁇ m or less, more preferably 10 ⁇ m to 180 ⁇ m, and still more preferably 10 ⁇ m to 160 ⁇ m. If it is such a range, when it applies to a touch panel, the laminated body which does not inhibit the responsiveness of this touch panel can be obtained.
  • the total light transmittance of the retardation layer is preferably 80% or more, more preferably 85% or more, and further preferably 90% or more.
  • the relative dielectric constant of the retardation layer is preferably 2 to 5, and more preferably 2 to 4. If the dielectric constant of the retardation layer is in such a range, it contributes to improvement of the function of the tactile feedback sensor using an electrical action (specifically, improvement of tactile sensitivity) in combination with the transparent conductive layer described later.
  • the resulting laminate can be obtained.
  • the dielectric constant can be measured by a trade name “4294A Precision Impedance Analyzer” (measurement frequency 100 kHz) manufactured by Agilent.
  • the elastic modulus at 25 ° C. of the retardation layer is preferably 1 GPa to 10 GPa, more preferably 2 GPa to 9 GPa, and further preferably 3 GPa to 8 GPa. If it is such a range, when it applies to a touch panel, the laminated body which can endure the pressing force at the time of operation and can implement
  • achieve favorable responsiveness can be obtained.
  • the above elastic modulus can be measured by an autograph (for example, trade name “Autograph AG-IS” manufactured by Shimadzu Corporation) by a stress-strain curve when a tensile load is applied to a measurement sample up to 20N. it can.
  • the retardation film constituting the retardation layer can be formed of any appropriate material as long as the effects of the present invention can be obtained.
  • a typical example is a stretched polymer film.
  • the resin that forms the polymer film include polycarbonate resins and cycloolefin resins.
  • the retardation film can be formed by stretching the polymer film.
  • the front retardation and the thickness direction retardation of the retardation film can be controlled by adjusting the stretching ratio and stretching temperature of the polymer film.
  • Stretch ratio depends on front retardation desired for retardation film, retardation in thickness direction, desired thickness for retardation film, type of resin used, thickness of polymer film used, stretching temperature, etc. Depending on the situation, it can be changed appropriately. Specifically, the draw ratio is preferably 1.1 times to 2.5 times, more preferably 1.25 times to 2.45 times, and still more preferably 1.4 times to 2.4 times.
  • Stretching temperature depends on front retardation desired for retardation film, retardation in thickness direction, desired thickness for retardation film, type of resin used, thickness of polymer film used, stretching ratio, etc. Depending on the situation, it can be changed appropriately. Specifically, the stretching temperature is preferably 100 ° C. to 250 ° C., more preferably 105 ° C. to 240 ° C., and further preferably 110 ° C. to 240 ° C.
  • any appropriate method can be adopted as long as the above optical characteristics and thickness can be obtained.
  • Specific examples include free end stretching and fixed end stretching.
  • free end uniaxial stretching is used, and more preferably free end longitudinal uniaxial stretching is used.
  • the retardation film may further contain any appropriate additive as necessary.
  • additives include plasticizers, heat stabilizers, light stabilizers, lubricants, antioxidants, ultraviolet absorbers, flame retardants, colorants, antistatic agents, compatibilizers, crosslinking agents, and thickeners. Etc. The kind and amount of the additive used can be appropriately set according to the purpose.
  • various surface treatments may be performed on the retardation layer.
  • the surface treatment any appropriate method is adopted depending on the purpose. For example, low-pressure plasma treatment, ultraviolet irradiation treatment, corona treatment, flame treatment, acid or alkali treatment may be mentioned.
  • the retardation layer is surface-treated to hydrophilize the retardation layer surface. If the retardation layer is hydrophilized, the processability when applying a conductive composition (described later) prepared with an aqueous solvent is excellent. Moreover, the laminated body excellent in the adhesiveness of a phase difference layer and a transparent conductive layer can be obtained.
  • the transparent conductive layer preferably contains a conductive polymer. If a transparent conductive layer is formed of a conductive polymer, a laminate having a desired surface resistivity can be formed.
  • the transparent conductive layer containing a conductive polymer can be formed, for example, by coating a conductive composition containing a conductive polymer on the retardation layer.
  • the surface resistivity of the transparent conductive layer is more than 10 3 ⁇ / ⁇ and 10 12 ⁇ / ⁇ or less, preferably 10 4 ⁇ / ⁇ to 10 10 ⁇ / ⁇ , and more preferably 10 5 ⁇ / ⁇ .
  • charges can be charged and released appropriately, and appropriate functions (eg, responsiveness, tactile diversity, etc.) are imparted to tactile feedback sensors that use electrical action. Can be obtained.
  • the surface resistivity of the transparent conductive layer is in the above range, it is possible to suppress unnecessary electrical influence on the touch sensor of the touch panel when the tactile feedback sensor including the laminate is applied to the touch panel.
  • the surface resistivity of the transparent conductive layer can be adjusted by the composition of the conductive composition, the thickness of the transparent conductive layer, and the like.
  • the thickness of the transparent conductive layer is preferably 1 nm to 200 nm, more preferably 1 nm to 180 nm, and further preferably 1 nm to 160 nm. If it is such a range, the transparent conductive layer which can charge and release an electric charge favorably will be formed. Moreover, the laminated body provided with such a transparent conductive layer can contribute to the improvement of the visibility through a polarizing lens when applied to an image display device provided with a polarizing plate.
  • the total light transmittance of the transparent conductive layer is preferably 80% or more, more preferably 85% or more, and further preferably 90% or more.
  • the conductive polymer contained in the conductive composition examples include a polyacetylene polymer, a polyparaphenylene polymer, a polyaniline polymer, a polythiophene polymer, a polyparaphenylene vinylene polymer, a polypyrrole polymer, a polyphenylene polymer, and an acrylic polymer.
  • the transparent conductive layer includes at least one polymer selected from the group consisting of a polyacetylene polymer, a polyparaphenylene polymer, a polyaniline polymer, a polythiophene polymer, a polyparaphenylene vinylene polymer, and a polypyrrole polymer. .
  • a polythiophene polymer is used as the conductive polymer. If a polythiophene polymer is used, a transparent conductive layer excellent in transparency and chemical stability can be formed.
  • Specific examples of the polythiophene-based polymer include: polythiophene; poly (3-C 1-8 alkyl-thiophene) such as poly (3-hexylthiophene); poly (3,4-ethylenedioxythiophene), poly (3,4 -Propylenedioxythiophene), poly [3,4- (1,2-cyclohexylene) dioxythiophene] and other poly (3,4- (cyclo) alkylenedioxythiophene); polythienylene vinylene and the like .
  • the conductive polymer is polymerized in the presence of an anionic polymer.
  • the polythiophene polymer is preferably oxidatively polymerized in the presence of an anionic polymer.
  • an anionic polymer the polymer which has a carboxyl group, a sulfonic acid group, and / or its salt is mentioned.
  • an anionic polymer having a sulfonic acid group such as polystyrene sulfonic acid is used.
  • the conductive polymer, a transparent conductive layer composed of the conductive polymer, and a method for forming the transparent conductive layer are described in, for example, JP2011-175601A and JP2012-146620A, These descriptions are incorporated herein by reference.
  • the transparent conductive layer can be formed by any appropriate method.
  • the transparent conductive layer can be formed, for example, by coating a conductive composition on the retardation layer.
  • the conductive composition is, for example, a dispersion liquid containing the conductive polymer and any appropriate solvent (for example, water), and the conductive polymer dispersed in the solvent.
  • the dispersion concentration of the conductive polymer in the dispersion is preferably 0.01 wt% to 50 wt%, more preferably 0.01 wt% to 30 wt%.
  • any appropriate method can be adopted as a method for applying the conductive composition. Examples thereof include a bar coating method, a roll coating method, a gravure coating method, a rod coating method, a slot orifice coating method, a curtain coating method, a fountain coating method, and a comma coating method.
  • the drying temperature is typically 50 ° C. or higher, preferably 90 ° C. or higher, more preferably 110 ° C. or higher.
  • the drying temperature is preferably 200 ° C. or lower, more preferably 180 ° C. or lower.
  • the drying time is preferably 1 minute to 1 hour, more preferably 1 minute to 30 minutes, and even more preferably 1 minute to 10 minutes.
  • the conductive composition may further include any appropriate additive as necessary.
  • the additive include a dispersion stabilizer, a surfactant, and an antifoaming agent.
  • the kind and amount of the additive used can be appropriately set according to the purpose.
  • the hard coat layer has a function of imparting chemical resistance, scratch resistance and surface smoothness to the laminate.
  • any appropriate material can be adopted as the material constituting the hard coat layer.
  • the material constituting the hard coat layer include an epoxy resin, an acrylic resin, a silicone resin, a urethane acrylate resin, and a mixture thereof.
  • an acrylic resin can be preferably used from the viewpoint of easily forming a hard coat layer having high hardness.
  • the hard coat layer can be obtained, for example, by applying a composition for forming a hard coat layer containing these resins or a precursor (monomer or oligomer) of the resin and curing it with heat or active energy rays.
  • the thickness of the hard coat layer can be set to any appropriate thickness depending on the application.
  • the thickness of the hard coat layer is, for example, 2 ⁇ m to 20 ⁇ m.
  • the hard coat layer forming composition may further contain any appropriate additive.
  • additives include polymerization initiators, antifouling agents, leveling agents, antiblocking agents, dispersion stabilizers, thixotropic agents, antioxidants, ultraviolet absorbers, antifoaming agents, thickeners, dispersants, and interfaces. Activators, catalysts, fillers, lubricants, antistatic agents and the like can be mentioned.
  • the pressure-sensitive adhesive layer is formed of any appropriate pressure-sensitive adhesive.
  • the adhesive includes an adhesive resin, and examples of the resin include acrylic resins, acrylic urethane resins, urethane resins, and silicone resins. Among these, an acrylic pressure-sensitive adhesive containing an acrylic resin is preferable.
  • the pressure-sensitive adhesive may further contain any appropriate additive as required.
  • the additive include a crosslinking agent, a tackifier, a plasticizer, a pigment, a dye, a filler, an anti-aging agent, a conductive material, an ultraviolet absorber, a light stabilizer, a release modifier, a softener, and a surfactant. , Flame retardants, antioxidants and the like.
  • crosslinking agent isocyanate crosslinking agent, epoxy crosslinking agent, peroxide crosslinking agent, melamine crosslinking agent, urea crosslinking agent, metal alkoxide crosslinking agent, metal chelate crosslinking agent, metal salt crosslinking agent, A carbodiimide type crosslinking agent, an oxazoline type crosslinking agent, an aziridine type crosslinking agent, an amine type crosslinking agent, etc. are mentioned.
  • the thickness of the pressure-sensitive adhesive layer is preferably 5 ⁇ m to 100 ⁇ m, more preferably 10 ⁇ m to 50 ⁇ m.
  • the laminate of the present invention can be used for a tactile feedback sensor.
  • the tactile feedback sensor may further include any appropriate member in addition to the laminated body.
  • the tactile feedback sensor includes, for example, an insulating layer, a protective layer, and the like provided on the viewing side of the laminate (the side opposite to the phase difference layer of the transparent conductive layer or the side opposite to the transparent conductive layer of the hard coat layer). It may further include other layers, and a control unit that senses contact and controls charge.
  • the tactile feedback sensor is provided on the viewing side (operation surface side) of the touch panel including the touch sensor, and more preferably, on the transparent conductive layer side of the laminate (in the form of FIGS. 2 and 3, a hard coat).
  • the control unit controls the energization of the electrodes of the touch sensor to induce charge of the stacked body.
  • the operator who touches the tactile feedback sensor senses tactile sensations such as unevenness by the strength of electrostatic force caused by the electric charge. Details of the tactile feedback sensor are described in Japanese Patent Application Laid-Open No. 2009-087359, and the description thereof is incorporated herein by reference.
  • the transparent conductive layer of the laminate has a function of accumulating the charges induced as described above.
  • the insulating layer has a function of preventing current based on the electric charge accumulated in the transparent conductive layer from flowing directly into the operator.
  • the protective layer has a function of imparting antifouling, water repellency and the like to the tactile feedback sensor.
  • the insulating layer and the protective layer may further have a function of another layer.
  • the insulating layer may have a protective function in addition to the insulating function.
  • any appropriate material can be used as long as it has insulating properties and light transmittance.
  • a resin material such as an acrylic resin can be used.
  • the thickness of the insulating layer can be set to any appropriate thickness depending on the application.
  • any appropriate material can be adopted as the material constituting the hard coat layer.
  • the material constituting the hard coat layer include an epoxy resin, an acrylic resin, a silicone resin, and a mixture thereof.
  • an acrylic resin can be preferably used from the viewpoint of easily forming a hard coat layer having high hardness.
  • the hard coat layer can be obtained by curing these resins with heat or active energy rays.
  • the thickness of the hard coat layer can be set to any appropriate thickness depending on the application.
  • any appropriate material can be adopted as a material for forming the protective layer.
  • the material constituting the protective layer include epoxy resins, acrylic resins, silicone resins, and mixtures thereof.
  • the thickness of the protective layer can be set to any appropriate thickness depending on the application.
  • the other layers can be laminated via any suitable adhesive or pressure-sensitive adhesive.
  • a touch panel including the tactile feedback sensor may be provided.
  • the touch panel includes a touch sensor and the tactile feedback sensor disposed on the touch sensor.
  • the arrangement method of the tactile feedback sensor is as described in the above section B.
  • any appropriate touch sensor may be used as the touch sensor, and examples thereof include a resistive touch sensor and a capacitive touch sensor.
  • a capacitive touch sensor is used.
  • the capacitive touch sensor typically includes a pair of arbitrary appropriate electrodes (for example, ITO electrodes) and an arbitrary appropriate insulating film disposed between the electrodes.
  • the touch sensor may further include any appropriate member.
  • a cover sheet for protecting the touch sensor may be provided outside the touch sensor, that is, between the touch sensor and the tactile feedback sensor.
  • the touch sensor may further include any appropriate optical film.
  • an image display apparatus provided with the above-mentioned touch panel may be provided.
  • the image display device includes the touch panel and a polarizing plate. Examples of such an image display device include a liquid crystal display device and an organic EL display device.
  • the image display device of the present invention may include any appropriate member other than the touch panel and the polarizing plate.
  • a liquid crystal display device shown in the schematic cross-sectional view of FIG.
  • the liquid crystal display device 500 includes a touch panel 300 and a liquid crystal panel 400. Touch panel 300 is arranged on the viewing side of liquid crystal panel 400.
  • the touch panel 300 includes the tactile feedback sensor 100 and the touch sensor 200 described above, and is arranged with the touch sensor 200 facing the liquid crystal panel 400 side.
  • the tactile feedback sensor 100 includes the laminate described above (in the illustrated example, the laminate 110).
  • the tactile feedback sensor 100 may further include various other layers as described in the above section B.
  • FIG. 4 a tactile feedback sensor including the stacked body 110 and the insulating layer 120 is shown as a representative example.
  • the tactile feedback sensor 100 is arranged with the stacked body 110 on the touch sensor 200 side.
  • the touch sensor 200 typically includes a first transparent electrode 210, a second transparent electrode 220, and an insulating film 230 disposed between the first transparent electrode 210 and the second transparent electrode 220. Is provided.
  • the touch panel 300 and the touch sensor 200 may include any appropriate member in addition to the illustrated members.
  • the liquid crystal panel 400 typically includes two polarizing plates (a viewing-side polarizing plate 410 and a back-side polarizing plate 410 ′) and a liquid crystal cell 420 disposed between the two polarizing plates. Arbitrary appropriate things may be used as a polarizing plate and a liquid crystal cell.
  • the liquid crystal panel 400 may include any appropriate member in addition to the illustrated members.
  • the angle formed by the absorption axis of the viewing-side polarizing plate provided in the image display device and the slow axis of the retardation layer provided in the laminate is preferably 30 ° to 60 °, The angle is more preferably 35 ° to 55 °, and further preferably 43 ° to 47 °.
  • an image display device provided with a tactile feedback function can be provided by using the laminate, the tactile feedback sensor including the laminate, and the touch panel including the tactile feedback sensor. Further, by using the laminate, it is possible to provide an image display device that has a polarizing plate and is excellent in visibility through a polarizing lens.
  • the evaluation methods in the examples are as follows.
  • the thickness was measured using a digital gauge cordless type “DG-205” manufactured by Ozaki Seisakusho Co., Ltd.
  • Retardation value The retardation value of the retardation layer was measured using a trade name “KOBRA-WRP” manufactured by Oji Scientific Instruments. The measurement temperature was 23 ° C. and the measurement wavelength was 590 nm.
  • Second Surface Resistance Value The surface resistance value of the obtained laminate was measured by a four-terminal method using a trade name “HIRESTA UP MCP-HT450” manufactured by Mitsubishi Chemical Analytech. The measurement temperature was 23 ° C.
  • Total light transmittance The total light transmittance of the obtained laminate was measured at room temperature using a trade name “HR-100” manufactured by Murakami Color Research Laboratory. In addition, it measured 3 times each, and made the average value the measured value.
  • a polarizing plate (manufactured by Nitto Denko Corporation, trade name “NPF-SEG1425DU”) is placed on the backlight, and the laminate obtained on the polarizing plate is further bonded to the polarizing plate.
  • the angle between the absorption axis and the slow axis of the retardation layer was 45 °. Thereafter, colorless light transmitted through the laminate was visually recognized through a polarizing lens.
  • a retardation layer was formed using a stretched polycarbonate film (manufactured by Teijin Chemicals Ltd., trade name “Pure Ace”, front retardation: 147 nm, thickness: 40 ⁇ m) as a retardation film.
  • a PEDOT / PSS dispersion manufactured by Heraeus, trade name “Clevios FE-T”; a dispersion of a conductive polymer composed of polyethylenedioxythiophene and polystyrene sulfonic acid; conductivity in the dispersion Conductive composition was prepared by adding 5 parts by weight of a conductive polymer dispersion concentration of 4% by weight.
  • the obtained conductive composition was applied to the retardation layer and dried in a 120 ° C. blow dryer for 2 minutes. I let you.
  • a laminate in which a transparent conductive layer (thickness 200 nm) was formed on the retardation layer was obtained.
  • the surface resistance of the laminate was 3.41 ⁇ 10 6 ⁇ / ⁇ , and the total light transmittance was 88.4%.
  • the transmitted light can be transmitted regardless of the angle between the absorption axis of the polarizer of the polarizing plate on the backlight and the absorption axis of the polarizing lens. was successfully visually recognized.
  • Example 2 Instead of a stretched polycarbonate film (trade name “Pure Ace” manufactured by Teijin Chemicals Ltd.) as a retardation film, a norbornene-based cycloolefin film (trade name “Zeonor” manufactured by Nippon Zeon Co., Ltd.) is used with a front retardation R 0 of 140 nm.
  • a laminate (retardation layer (thickness: 33 ⁇ m) / transparent conductive layer (thickness: 200 nm)) was obtained in the same manner as in Example 1 except that a uniaxially stretched film was used.
  • the surface resistance of the laminate was 2.01 ⁇ 10 6 ⁇ / ⁇ , and the total light transmittance was 88.5%.
  • the transmitted light can be transmitted regardless of the angle between the absorption axis of the polarizer of the polarizing plate on the backlight and the absorption axis of the polarizing lens. was successfully visually recognized.
  • an acrylic resin trade name “Biscoat # 300” manufactured by Osaka Organic Chemical Industry Co., Ltd., a
  • a composition was prepared. On the transparent conductive layer of the laminate (retardation layer / transparent conductive layer) obtained in Example 1 using a bar coater (trade name “Bar Coater No. 06”, manufactured by Daiichi Science Co., Ltd.), the above hard The composition for forming a coat layer was applied and dried in a blow dryer at 80 ° C. for 2 minutes to obtain a laminate (retardation layer / transparent conductive layer / hard coat layer) having a hard coat layer having a thickness of 5 ⁇ m. The total light transmittance of the obtained laminate was 88.5%.
  • the transmitted light can be transmitted regardless of the angle between the absorption axis of the polarizer of the polarizing plate on the backlight and the absorption axis of the polarizing lens. was successfully visually recognized.
  • Example 4 A 23 ⁇ m thick adhesive layer was formed on the retardation layer of the laminate (retardation layer / transparent conductive layer / hard coat layer) obtained in the same manner as in Example 3, and the laminate (adhesive layer / position) A phase difference layer / transparent conductive layer / hard coat layer) was obtained.
  • a transparent pressure-sensitive adhesive layer having an elastic modulus of 10 N / cm 2 was formed from the pressure-sensitive adhesive.
  • the total light transmittance of the obtained laminate was 89.2%.
  • the transmitted light can be transmitted regardless of the angle between the absorption axis of the polarizer of the polarizing plate on the backlight and the absorption axis of the polarizing lens. was successfully visually recognized.
  • the transmitted light is not visible when the absorption axis of the polarizer of the polarizing plate on the backlight and the absorption axis of the polarizing lens are orthogonal to each other. It was. Moreover, when the absorption axis of the polarizer of the polarizing plate on the backlight and the absorption axis of the polarizing lens were not orthogonal, the transmitted light was colored and visually recognized.
  • the transmitted light can be transmitted regardless of the angle between the absorption axis of the polarizer of the polarizing plate on the backlight and the absorption axis of the polarizing lens.

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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)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)
  • Non-Insulated Conductors (AREA)

Abstract

L'invention concerne un corps stratifié doté d'une couche conductrice transparente déterminée destinée à conférer un effet de rétroaction tactile, ledit corps stratifié étant capable de contribuer à l'amélioration de la visibilité à travers une lentille polarisée si le corps stratifié est appliqué à un dispositif d'affichage d'image doté d'une plaque de polarisation. Un corps stratifié selon la présente invention est doté d'une couche de retard et d'une couche conductrice transparente prévue sur un côté ou sur les deux côtés de la couche de retard. Le retard frontal de la couche de retard pour une longueur d'onde de 590 nm est de 90 nm à 190 nm. La résistance superficielle de la couche conductrice transparente est supérieure à 103 Ω/carré et inférieure ou égale à 1012 Ω/carré.
PCT/JP2014/077891 2013-10-23 2014-10-21 Corps stratifié WO2015060275A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2013220207 2013-10-23
JP2013-220207 2013-10-23
JP2014196519A JP2015107637A (ja) 2013-10-23 2014-09-26 積層体
JP2014-196519 2014-09-26

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WO2015060275A1 true WO2015060275A1 (fr) 2015-04-30

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002040243A (ja) * 2000-07-19 2002-02-06 Fuji Photo Film Co Ltd 円偏光板、タッチパネルおよび反射型液晶表示装置
JP2002048913A (ja) * 2000-08-04 2002-02-15 Fuji Photo Film Co Ltd 位相差板、円偏光板および反射型液晶表示装置
JP2006313330A (ja) * 2005-05-04 2006-11-16 Samsung Electronics Co Ltd 偏光板アセンブリとその製造方法、及びそれを用いたパネルアセンブリの製造方法
JP2009117071A (ja) * 2007-11-02 2009-05-28 Kaneka Corp 透明導電膜
JP2009222743A (ja) * 2008-03-13 2009-10-01 Toray Ind Inc 偏光子保護フィルム
JP2012027191A (ja) * 2010-07-22 2012-02-09 Fujifilm Corp 光反射性フィルムの製造方法、及び光反射性フィルム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002040243A (ja) * 2000-07-19 2002-02-06 Fuji Photo Film Co Ltd 円偏光板、タッチパネルおよび反射型液晶表示装置
JP2002048913A (ja) * 2000-08-04 2002-02-15 Fuji Photo Film Co Ltd 位相差板、円偏光板および反射型液晶表示装置
JP2006313330A (ja) * 2005-05-04 2006-11-16 Samsung Electronics Co Ltd 偏光板アセンブリとその製造方法、及びそれを用いたパネルアセンブリの製造方法
JP2009117071A (ja) * 2007-11-02 2009-05-28 Kaneka Corp 透明導電膜
JP2009222743A (ja) * 2008-03-13 2009-10-01 Toray Ind Inc 偏光子保護フィルム
JP2012027191A (ja) * 2010-07-22 2012-02-09 Fujifilm Corp 光反射性フィルムの製造方法、及び光反射性フィルム

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TW201523383A (zh) 2015-06-16

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