WO2017056756A1 - Film anti-reflet - Google Patents

Film anti-reflet Download PDF

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Publication number
WO2017056756A1
WO2017056756A1 PCT/JP2016/073830 JP2016073830W WO2017056756A1 WO 2017056756 A1 WO2017056756 A1 WO 2017056756A1 JP 2016073830 W JP2016073830 W JP 2016073830W WO 2017056756 A1 WO2017056756 A1 WO 2017056756A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
light control
film
light
control film
Prior art date
Application number
PCT/JP2016/073830
Other languages
English (en)
Japanese (ja)
Inventor
久美子 神原
憲雄 石井
川島　朋也
Original Assignee
大日本印刷株式会社
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
Application filed by 大日本印刷株式会社 filed Critical 大日本印刷株式会社
Publication of WO2017056756A1 publication Critical patent/WO2017056756A1/fr

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    • 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
    • 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

Definitions

  • the present invention relates to a light control film that can be used for, for example, an electronic blind that is attached to a window to control the transmission of extraneous light.
  • Patent Documents 1 and 2 various devices related to a light control film that controls the transmission of extraneous light by being attached to a window have been proposed (Patent Documents 1 and 2).
  • One such light control film uses liquid crystal.
  • the light control film using the liquid crystal is produced by sandwiching a liquid crystal material with a transparent film material on which a transparent electrode is produced, and producing the liquid crystal cell with a linear polarizing plate.
  • the orientation of the liquid crystal is changed by changing the electric field applied to the liquid crystal, thereby blocking or transmitting the extraneous light, and further changing the amount of transmitted light. To control.
  • JP 03-47392 A Japanese Patent Laid-Open No. 08-184273
  • the present invention has been made in view of such a situation, and an object of the present invention is to make it possible to more reliably block transmitted light as compared with the related art with respect to a light control film.
  • the present inventor conducted extensive research to solve the above-mentioned problems, and arranged the transparent film so that the optical axes (slow axis directions) are orthogonal on both sides of the liquid crystal layer.
  • the idea of eliminating the influence and reducing the transmittance at the time of shading was led to the completion of the present invention.
  • the slow axis is the direction in which the refractive index of a material having refractive index anisotropy is maximized.
  • the present invention provides the following.
  • a liquid crystal layer is sandwiched between first and second laminates obtained by providing at least an alignment layer on a substrate made of a transparent film material, Controlling the light distribution of the liquid crystal according to the liquid crystal layer by driving the transparent electrode provided in the first and / or the second laminate to control the transmitted light;
  • the light control film in which the optical axis of the base material of the said 1st and 2nd laminated body orthogonally crosses.
  • the phase difference of transmitted light imparted by the substrate of the first or second laminate can be canceled by the phase difference of the substrate of the second or first laminate, This effectively avoids an increase in transmittance due to optical anisotropy of the base material and can reduce the transmittance during light shielding, thereby blocking the transmitted light more reliably than in the past. it can.
  • a light control film comprising an optical functional layer of a linearly polarizing plate on a side surface opposite to the liquid crystal layer of the first and second laminates.
  • the transmitted light can be more reliably shielded by a more specific configuration than in the past.
  • the transparent film material is A light control film that is either a polycarbonate film or a COP film.
  • the transmitted light can be more reliably shielded by a more specific configuration of the substrate as compared with the conventional case.
  • the transmitted light can be shielded more reliably than in the past.
  • FIG. 1 is a cross-sectional view showing a light control film according to the first embodiment of the present invention.
  • This light control film 1 is used by being attached to an area for light control such as a window glass of a building, a showcase, an indoor transparent partition, etc. with an adhesive layer or the like, and the amount of transmitted light can be reduced by changing the applied voltage. Control.
  • This light control film 1 is a film material that controls transmitted light using liquid crystal, and is configured by sandwiching a liquid crystal cell 4 for light control film between linear polarizing plates 2 and 3.
  • the linear polarizing plates 2 and 3 are formed by impregnating polyvinyl alcohol (PVA) with iodine or the like, and then stretched to form an optical functional layer that performs an optical function as a linear polarizing plate.
  • PVA polyvinyl alcohol
  • TAC triacetyl cellulose
  • the optical functional layer is sandwiched between base materials made of a transparent film material such as the above.
  • the linearly polarizing plates 2 and 3 are arranged in the liquid crystal cell 4 by an adhesive layer made of an ultraviolet curable resin or the like in a crossed Nicol arrangement.
  • the linear polarizing plates 2 and 3 are provided with retardation films 2A and 3A for optical compensation on the liquid crystal cell 4 side, respectively, but the retardation films 2A and 3A may be omitted as necessary.
  • the liquid crystal cell 4 controls the polarization plane of transmitted light by an applied voltage to a transparent electrode described later.
  • the light control film 1 is comprised so that transmitted light can be controlled and various light control can be aimed at.
  • the liquid crystal cell 4 is configured by sandwiching a liquid crystal layer 8 between an upper laminate 5U and a lower laminate 5D which are first and second laminates in a film shape.
  • the lower laminate 5D is formed by producing the transparent electrode 11, the spacer 12, and the alignment layer 13 on the base 6 made of a transparent film material.
  • the upper laminate 5U is formed by laminating a transparent electrode 16 and an alignment layer 17 on a base material 15 made of a transparent film material.
  • the liquid crystal cell 4 controls the orientation of the liquid crystal material provided in the liquid crystal layer 8 by the TN (Twisted Nematic) method by driving the transparent electrodes 11 and 16 provided in the upper laminate 5U and the lower laminate 5D. This controls the plane of polarization of the transmitted light.
  • TN Transmission Nematic
  • a driving system such as a VA (Virtual Alignment) system or an IPS (In-Place-Switching) system may be applied.
  • VA Virtual Alignment
  • IPS In-Place-Switching
  • a film material with small optical anisotropy Although various transparent film materials applicable to this kind of film material can be applied to the base materials 6 and 15, it is desirable to apply a film material with small optical anisotropy.
  • a polycarbonate film is applied to the base materials 6 and 15, a COP (cycloolefin polymer) film or the like may be applied.
  • the transparent electrodes 11 and 16 various electrode materials applied to this type of film material can be applied.
  • the transparent electrodes 11 and 16 are formed of a transparent electrode material made of ITO (Indium Tin Oxide).
  • the spacer 12 is provided to define the thickness of the liquid crystal layer 8 and various resin materials can be widely applied.
  • the spacer 12 is made of a photoresist, and a substrate formed by producing the transparent electrode 11. It is produced by applying a photoresist on 6 and exposing and developing.
  • the spacer 12 may be provided in the upper laminate 5U, or may be provided in both the upper laminate 5U and the lower laminate 5D.
  • the alignment layers 13 and 17 are produced by rubbing a polyimide resin layer.
  • the alignment layers 13 and 17 can be applied with various configurations capable of expressing the alignment regulating force with respect to the liquid crystal material related to the liquid crystal layer 8, and may be formed by a so-called photo-alignment layer. You may form and form the fine line-shaped uneven
  • the spacer 12 may be provided on the alignment layer 13.
  • the alignment is not changed by ultraviolet irradiation after the alignment, for example, a light dimerization type.
  • a light dimerization type material “M. Schadt, K. Schmitt, V. Kozinkov and V. Chigrinov: Jpn. J. Appl. Phys., 31, 2155 (1992)”, “M. Schadt. Seiberle and A. Schuster: Nature, 381, 212 (1996).
  • liquid crystal materials applicable to this kind of light control film can be widely applied to the liquid crystal layer 8.
  • a sealing material 19 is disposed so as to surround the liquid crystal layer 8, and the upper stacked body 5 ⁇ / b> U and the lower stacked body 5 ⁇ / b> D are integrally held by the sealing material 19, thereby preventing leakage of the liquid crystal material. .
  • FIG. 2 is a diagram for explaining the arrangement of the base materials 6 and 15 in the light control film 1.
  • the transparent material by the same material and thickness is applied to the base materials 6 and 15, and the base materials 6 and 15 are arrange
  • the range perpendicular to the optical axis L1 includes practically sufficient transmittance at the time of light shielding although the angle formed by the two optical axes L1 including the measurement error and the manufacturing error is within 90 ° ⁇ 5 °. From the viewpoint of suppressing the angle, it is preferably within 90 ° ⁇ 2 °, and more preferably within 90 ° ⁇ 1 °.
  • the thickness of the base material varies, and when the same film material is applied to the base materials 6 and 15, the thickness of the base material 6 is ⁇ 10 ⁇ m, which is the thickness of the base material 15; From the viewpoint of sufficiently suppressing the thickness of the base material 6, the thickness of the base material 6 is preferably ⁇ 10 ⁇ m, and the thickness of the base material 6 is more preferably ⁇ 5 ⁇ m. preferable.
  • the thickness of the base material 6 is preferably ⁇ 10 ⁇ m, and the thickness of the base material 6 is more preferably ⁇ 5 ⁇ m. preferable.
  • the transmitted light is controlled.
  • the base materials 6 and 15 of the cell 4 have optical anisotropy
  • the incident light of the liquid crystal layer 8 enters the liquid crystal layer 8 by elliptical polarization due to the optical anisotropy of the base materials 6 and 15. .
  • transmitted light including the transmission axis direction component of the output side linearly polarizing plate is transmitted from the liquid crystal layer 8.
  • a transparent film material with sufficiently small optical anisotropy is applied to the base materials 6 and 15.
  • a polycarbonate film or the like is applied to the base materials 6 and 15, and this polycarbonate film has an extremely small in-plane retardation of about 10 nm.
  • the incident-side base material gives the transmitted light.
  • the phase difference thus made can be canceled out by the substrate on the emission side, whereby the transmittance during light shielding can be significantly reduced.
  • the transmittance at the time of light shielding is about 2%, whereas the optical axis of this substrate is orthogonal.
  • the transmittance at the time of light shielding can be reduced to about 0.2%, whereby the transmittance can be reduced to 1/10 as compared with the case of the optical axis parallel arrangement.
  • the light control film 1 has the transmission axes L2 parallel to the linear polarizing plates 3 and 2 laminated on the substrates 6 and 15 with respect to the optical axes L1 of the substrates 6 and 15, respectively.
  • the linearly polarizing plates 3 and 2 are arranged in a crossed Nicol arrangement so as to correspond to the alignment direction of the liquid crystal material by the alignment layers 13 and 17. What is necessary is just to be sufficient and can arrange
  • Example 1 A polycarbonate film material having a thickness of 100 ⁇ m formed by forming hard coat layers on both sides was applied to the base materials 6 and 15, and a light control film was produced according to the configuration of the first embodiment described above.
  • the retardation films 2A and 3A are omitted.
  • the arrangement of the base materials 6 and 15 and the linear polarizing plates 2 and 3 is an arrangement according to the inclination described above with reference to FIG.
  • the transmittance was 0.2% when there was no electric field, and it was confirmed that the transmitted light could be sufficiently shielded when shielded.
  • Example 2 In Example 2, as shown in FIG. 3, the transmission axes L ⁇ b> 2 of the linearly polarizing plates 2 and 3 are arranged so as to form an angle of 45 degrees with respect to the optical axis L ⁇ b> 1 of the base materials 15 and 6. As a result, in Example 2, the alignment layers 13 and 17 are set to the rubbing direction at an angle of 45 degrees with respect to the optical axis L1 of the base materials 6 and 15.
  • the second embodiment has the same configuration as that of the first embodiment except that the configuration regarding the arrangement of the linearly polarizing plates 2 and 3 is different. Also in Example 2, the transmittance was 0.2% when there was no electric field, and it was confirmed that the transmitted light could be sufficiently shielded when shielded.
  • Comparative Example 1 As shown in FIG. 4, Comparative Example 1 was configured in the same manner as Example 1 except that the optical axes L1 of the base materials 5 and 16 were arranged in parallel. In Comparative Example 1, it was found that the transmittance was 2.0% when no electric field was applied, and the transmittance was high.
  • Comparative Example 2 As shown in FIG. 5, Comparative Example 2 was configured in the same manner as Example 2 except that the optical axes L1 of the base materials 5 and 16 were arranged in parallel. In Comparative Example 2, it was found that the transmittance was 2.0% when no electric field was applied, and the transmittance was high.
  • FIG. 6 is a flowchart showing the manufacturing process of the light control film.
  • transparent electrodes 11 and 16 are respectively formed on the substrates 6 and 15 by applying a photolithography technique in the electrode manufacturing process SP2.
  • a photoresist film is prepared on the substrate 6, and then exposed and developed, whereby the spacer 12 is prepared.
  • the manufacturing step SP4 of the alignment layer the polyimide resin layer coating solution is formed on the base material 6 formed of the spacer 12 and on the base material 15 formed of the transparent electrode 16. After coating, drying and heat treatment are performed, thereby producing a polyimide film.
  • the polyimide film is rubbed to produce the alignment layers 13 and 17.
  • a sealant is applied in a frame shape using a dispenser to the substrate 6 formed with the alignment layer 13, and then a predetermined position surrounded by the frame shape.
  • the liquid crystal material according to the liquid crystal layer 8 is dropped using a dispenser.
  • the upper laminated body 5U and the lower laminated body 5D are sealed by the sealing material 19 so that the liquid crystal layer 8 is sandwiched by pressing and heating.
  • the light control film 1 is produced by bonding and integrating.
  • the present invention is not limited to this and can be widely applied to the case where the liquid crystal material is driven by the VA method and the IPS method.
  • the spacer is manufactured using the photoresist.
  • the present invention is not limited to this, and a so-called bead spacer may be applied.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)

Abstract

L'objectif de la présente invention est, en ce qui concerne un film anti-reflet, de bloquer de manière plus fiable une lumière transmise que dans l'état de la technique. Une couche de cristaux liquides (8) est prise en sandwich entre un premier et un second corps stratifiés (5D, 5U) dans lesquels au moins des couches d'alignement (13, 17) sont disposées sur des matériaux de base (6, 15) constitués d'un matériau de film transparent. La distribution de lumière des cristaux liquides dans la couche de cristaux liquides (8) est commandée par des électrodes transparentes de commande (11, 16) disposées au niveau des première et seconds corps stratifiés (5D, 5U), ce qui permet de commander la transmission de la lumière. Les axes optiques des matériaux de base (6, 15) des premiers et secondes corps stratifiés (5D, 5U) sont orthogonaux l'un par rapport à l'autre.
PCT/JP2016/073830 2015-09-28 2016-08-15 Film anti-reflet WO2017056756A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-190322 2015-09-28
JP2015190322A JP5950014B1 (ja) 2015-09-28 2015-09-28 調光フィルム

Publications (1)

Publication Number Publication Date
WO2017056756A1 true WO2017056756A1 (fr) 2017-04-06

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PCT/JP2016/073830 WO2017056756A1 (fr) 2015-09-28 2016-08-15 Film anti-reflet

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JP (1) JP5950014B1 (fr)
TW (1) TWI592724B (fr)
WO (1) WO2017056756A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6128270B1 (ja) * 2016-07-11 2017-05-17 大日本印刷株式会社 調光フィルム
JP7074071B2 (ja) * 2016-12-27 2022-05-24 大日本印刷株式会社 調光フィルム
JP7110547B2 (ja) * 2016-12-27 2022-08-02 大日本印刷株式会社 調光フィルム
JP7155503B2 (ja) * 2016-12-28 2022-10-19 大日本印刷株式会社 調光部材、構造物、調光部材の配置方法
JP7536417B2 (ja) * 2016-12-28 2024-08-20 大日本印刷株式会社 調光部材、構造体、調光部材の配置方法
JP2019101384A (ja) * 2017-12-08 2019-06-24 大日本印刷株式会社 調光フィルム、調光部材

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933428A (ja) * 1982-08-19 1984-02-23 Asahi Glass Co Ltd 液晶表示素子
JPS6432229A (en) * 1987-07-28 1989-02-02 Ricoh Kk Liquid crystal display element having plastic substrate
JPH1138408A (ja) * 1997-07-17 1999-02-12 Asahi Glass Co Ltd 調光素子
JP2007249125A (ja) * 2006-03-20 2007-09-27 Nec Corp 視野角制御表示装置及びこれを備えた端末機
JP2009103828A (ja) * 2007-10-22 2009-05-14 Hitachi Displays Ltd 液晶表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933428A (ja) * 1982-08-19 1984-02-23 Asahi Glass Co Ltd 液晶表示素子
JPS6432229A (en) * 1987-07-28 1989-02-02 Ricoh Kk Liquid crystal display element having plastic substrate
JPH1138408A (ja) * 1997-07-17 1999-02-12 Asahi Glass Co Ltd 調光素子
JP2007249125A (ja) * 2006-03-20 2007-09-27 Nec Corp 視野角制御表示装置及びこれを備えた端末機
JP2009103828A (ja) * 2007-10-22 2009-05-14 Hitachi Displays Ltd 液晶表示装置

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TWI592724B (zh) 2017-07-21
TW201712416A (zh) 2017-04-01
JP5950014B1 (ja) 2016-07-13
JP2017067869A (ja) 2017-04-06

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