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WO2015107395A1 - Procédé de réalisation d'une ouverture dans un composant, et composant associé - Google Patents

Procédé de réalisation d'une ouverture dans un composant, et composant associé Download PDF

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Publication number
WO2015107395A1
WO2015107395A1 PCT/IB2014/058401 IB2014058401W WO2015107395A1 WO 2015107395 A1 WO2015107395 A1 WO 2015107395A1 IB 2014058401 W IB2014058401 W IB 2014058401W WO 2015107395 A1 WO2015107395 A1 WO 2015107395A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
component
sealing material
previous
display layer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB2014/058401
Other languages
English (en)
Inventor
Andrei Papshev
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WHAT WATCH AG
Original Assignee
WHAT WATCH AG
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 WHAT WATCH AG filed Critical WHAT WATCH AG
Priority to PCT/IB2014/058401 priority Critical patent/WO2015107395A1/fr
Publication of WO2015107395A1 publication Critical patent/WO2015107395A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1679—Gaskets; Spacers; Sealing of cells; Filling or closing of cells
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/12—Selection of materials for dials or graduations markings
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G17/00—Structural details; Housings
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals

Definitions

  • the invention relates to a method for providing a hole or opening into a component, such as e.g. to a watch dial, where the component comprises protective layers and a display layer arranged between the protective layers and wherein said display layer comprises an electrophoretic ink paper layer or other polymer film having cavities with fluid used advantageously for displaying purposes.
  • a component such as a watch dial, which comprises at least one hole or opening manufactured by the method.
  • Electrophoretic ink paper displays are nowadays used also in components, such as in watch dials, where holes or other openings must be provided to the electrophoretic ink paper display for example for axis of quartz or mechanical movement of the watch.
  • the hole or opening may also be provided for other purposes, and it might be provided only to a certain depth of the layer (partially through) or totally through said display layer of the electrophoretic ink paper.
  • another display or other relevance may be located below the first one so that the opening in the first one will enable view of the second display or other relevance.
  • Electrophoretic display comprises titanium dioxide particles dispersed in oil based or other highly viscous medium, e.g. hydrocarbon oil, and some dye- material is also used along with surfactants and charging agents that cause the particles to take on an electric charge.
  • the medium are arranged typically into cavities forming pixels of the display, and the cavities are approximately in a range of micrometers in diameter.
  • the cavities having oil based or other highly viscous medium, ink or dye-material and other particles will be broken, whereupon the medium leaks away from the cavities, which again make the display non-active also at the rim area of the hole or opening.
  • moisture will also be absorbed or diffused into or out the structure of the electrophoretic display, which additionally destroy the active area of the electrophoretic display.
  • the component 100 typically comprises protective layers 101 , 102 and a display layer 103 arranged between the protective layers.
  • the component 100 also comprises a printed circuit 104 or other backplane with suitable electronics for controlling the display.
  • the protective layer 101 is manipulated, such as treated by heating treatment, after the hole drilling to cover the surface of the hole 105 so to prevent the moisture absorption or diffusion to the structure of the electrophoretic ink paper 103.
  • the non-active area 105a of the hole is quite large, typically 5-7 millimeters, even though the final diameter 105b of the through hole is very often around of 2 millimeters.
  • the non- active or blind area is at least the area covered by the initial diameter 105a or even little bit larger due to moisture absorption, diffusion or leaking of the oil based medium of the electrophoretic display, which is clearly a disadvantage.
  • the active are is denoted by reference number 106.
  • An object of the invention is to alleviate and eliminate the problems relating to the known prior art.
  • Especially the object of the invention is to provide a method for providing a hole or opening into a component, such as a watch dial, comprising protective layers and a display layer between the protective layers, wherein said display layer comprises an electrophoretic ink paper layer or other polymer film having cavities with fluid used advantageously for displaying purposes.
  • the object of the invention is to provide the hole or opening so that to minimize the non-active area and maximizing the active area of the display.
  • the object of the invention can be achieved by the features of independent claims.
  • the invention relates to a method for providing a hole or opening according to claim 1.
  • the invention relates to a component, such as a watch dial, with a hole or opening manufactured with the method, according to claim 14.
  • a hole or opening is provided into a component, such as a watch dial, where the component comprises protective layers and a display layer between the protective layers.
  • the display layer comprises an electrophoretic ink paper layer known from the prior art related to technical field of electrophoretic ink papers.
  • a first hole is provided at least partially through the display layer of the component, the first hole having a first diameter.
  • the hole is provided advantageously by laser.
  • the diameter of the first hole is advantageously in a range of 1-5 mm.
  • moisture sealing material differing from the material of the protective layer is provided in the contact with the first hole in order to seal the surface of the hole of the electrophoretic ink paper layer.
  • the embodiment offers clear advantages namely when using the moisture sealing material, which is separate from the protective layer, the diameter of the first hole (and the blind area) can be very small.
  • the sealing material separate from the protective layer can be applied very accurately in the contact with the hole surface, which still seal the surface of the hole and thereby prevents any leakages or moisture absorption or diffusion in an effective way.
  • the separate moisture sealing material is very easy, cost effective and fast way to seal the hole.
  • the surface of the first hole is cleaned before applying said sealing material in order to remove damaged capsules or cavities of electrophoretic ink and thereby enabling more reliable contact and sealing with the moisture sealing material.
  • the cleaning can be done mechanically and/or using specific chemical agent.
  • the first hole is filled with the moisture sealing material, whereafter a second hole with a second diameter is provided essentially concentrically with the first one.
  • the sealing material may be provided by a dispenser or screen printing method, as an example. According to an advantageously embodiment at least partial vacuum may be introduced into the first hole for facilitating the sealing material apply into the first hole.
  • the sealing material may be e.g. UV curable, thermally curable, room temperature curable, and/or humidity curable sealing material, whereupon it is cured after introduction to the hole by suitable treatment, such as UV radiation, thermal treatment or humidity treatment before providing said second hole, for example.
  • the sealing material may comprises silicone, UV acrylate, epoxy or polyurethane, for example.
  • the second hole is advantageously provided to said first hole filled by said sealing material in order to provide a second hole to said component, the second hole having a second diameter being smaller than said first diameter of the first hole.
  • the diameter of the second hole is typically in a range of 0.3-2 mm, for example.
  • the first hole may be provided to so enable bending of the component around said opening.
  • the component is a display of a watch dial, which should be bent along the wristband.
  • the sealing material may be provided in the contact with the surface of the opening for example at the same time when the component is bent and there might be no need to fill the hole before that.
  • the first hole may be totally filled with the sealing material, after which said second hole is provided at least partially though the sealing material for example after the sealing material is cured, e.g. hardened. This is the case e.g. when a axis of a quartz or mechanical movement is introduced through the hole.
  • the first hole is advantageously provided by a first laser beam.
  • the second hole may be provided e.g. by a second laser beam or drilling the moisture sealing material. This is advantageously done after hardening the moisture sealing material.
  • the component is advantageously e.g. a watch dial comprising protective layers and an electrophoretic ink paper layer between the protective layers.
  • the final product, such as the watch dial comprises suitable controlling means in the connection with the electrophoretic ink paper layer.
  • the controlling means are advantageously configured to manipulate charging agents of the electrophoretic ink paper layer in order to provide an electrophoretic display, and the controlling means are advantageously arranged in a printed circuit, or other backplane, which can be flexible or rigid.
  • the controlling means are formed in a segmented form in order to achieve segmented display. Also other implementations are naturally possible.
  • the component additionally comprises at least a first hole or opening provided at least partially through the display layer. Additionally the component may also be provided with a second hole or opening. The component with the hole(s) is manufactured by processes as discussed in this description.
  • the present invention offers advantages over the known prior art, such as very accurate and fast method for providing holes or openings into the electrophoretic ink paper layer as well as also to or other polymer film having cavities with fluid.
  • the non-active area can be kept very small, whereupon the active area of the component, such as a watch dial, can be maximized.
  • the sealing material separate from the protective layer can be applied very accurately in the contact with the hole surface, which still seal the surface of the hole and thereby prevents any leakages or moisture absorption or diffusion in an effective way.
  • the separate moisture sealing material is very easy, cost effective and fast way to seal the hole.
  • the final product, such as a watch dial is aesthetically very high quality because the very small hole through which the axis of the movement can be applied.
  • Figure 1 illustrates a prior art method for providing a hole to the component
  • Figures 2A-2D illustrate a principle of an exemplary method for providing a first and second holes to the component according to an advantageous embodiment of the invention
  • Figures 3A-3D illustrate a principle of an exemplary method for providing a hole to the component to be bent according to an advantageous embodiment of the invention.
  • Figure 1 illustrates a prior art method for providing a hole to the component and is already discussed in the connection of the background of the invention portion of this document.
  • Figures 2A-2D illustrate a principle of an exemplary method 200 for providing a first 201 and second 202 holes to the component 203 according to an advantageous embodiment of the invention.
  • the exemplary component in Figures 2A-3D is a watch dial comprising an electrophoretic ink paper layer 204 as a display, and protective layers 205, 206 around the electrophoretic ink paper layer 204 (display layer hereafter).
  • the first hole 201 is provided at least partially through the display layer 204 of the component.
  • the first hole has a first diameter and is advantageously provided by a laser 207.
  • moisture sealing material 213 differing from the material of the protective layers 205, 206 is provided into the first hole 201 in order to seal the surface of the hole 201 of the electrophoretic ink paper layer 204 and thereby preventing moisture absorption or diffusion to the electrophoretic ink paper as well as preventing also leakages of the oil based or other medium from the electrophoretic ink paper.
  • the surface of the first hole 201 may also be rinsed by suitable rinsing apparatus 208 before applying the sealing material.
  • the sealing material may be provided by a dispenser 209 or screen printing, as an example.
  • partial vacuum may be introduced into the first hole 201 advantageously via opposite side than where the sealing material is introduced.
  • the vacuum can be introduced via a small hole 210 at the bottom of the component (extending through the bottom plate, such as a printed circuit 212) by using suitable vacuum pump 21 1.
  • the small hole 210 may be provided e.g. by the laser 207 or drilling.
  • the sealing material may be e.g. UV curable, thermally curable, room temperature curable, and/or humidity curable sealing material, whereupon it is cured after introduction by a suitable treatment means 215, such as by a UV radiator, heater or humidity damper.
  • a suitable treatment means 215, such as by a UV radiator, heater or humidity damper such as by a UV radiator, heater or humidity damper.
  • the second hole 202 with a second diameter is then provided essentially concentrically with the first hole 201 into the sealing material 206 for example by laser 207 or drilling 214.
  • the diameter of the second hole is advantageously smaller than the diameter of the first hole.
  • the difference of the diameters is provided so that enough sealing material is left in the contact with the electrophoretic display 204 and thereby preventing moisture absorption.
  • the holes 201 , 202 may be provided to the component 203 having only protective layers 205, 206 and the electrophoretic layer 204 between them, whereupon the suitable printed circuit 212 or other backplane with suitable controlling means for controlling the component and especially the display 204 is provided.
  • the suitable printed circuit 212 or other backplane with suitable controlling means for controlling the component and especially the display 204 is provided.
  • the printed circuit or other backplane comprises material differing from the protective layers as well as from the electrophoretic display, such as at least one of the following: Au (gold), Ni (Nickel) or Cu (Copper), (Ag) Silver.
  • the power and/or the wavelength of the laser beams used for providing the hole(s) are advantageously chosen so to machining the display layer comprising the electrophoretic ink paper layer in suitable manner.
  • at least the second hole 202 is advantageously provided to extend through the printed circuit 212 or other backplane in order to provide hole for the axis of the movement.
  • Figures 3A-3D illustrate a principle of an exemplary method 300 for providing a hole (or opening) 301 to the component 203 to be bent.
  • the hole 301 is not extending through the component, but only thought the bottom protective layer 206 and at least partially through the electrophoretic display 204.
  • the hole is provided advantageously by the laser 207 and can be provided similarly than in the method 100.
  • the form of the hole 301 is advantageously formed as an opening (with a certain angle, such as an opening triangle) so to provide a structure, which is easy to bend around said opening (see especially Figures 3C-3D). It is to be noted that one or more holes or openings can be provided.
  • the moisture sealing material 213 may be applied either at least partially into the hole 301 or alternatively arranged so that it will be applied in the contact 302, 303 of the first hole at least when the component is bent and/or arranged on the top of the printed circuit 212 or other backplane.
  • the invention has been explained above with reference to the aforementioned embodiments, and several advantages of the invention have been demonstrated. It is clear that the invention is not only restricted to these embodiments, but comprises all possible embodiments within the spirit and scope of the inventive thought and the following patent claims. It is to be noted plurality of different kinds of holes and openings can be provided to the component, such as the component may comprise both the holes 201 , 202 for inserting e.g. a axis through the component, as well as openings 301 so to bend said component around the openings.
  • the invention can also be applied with other polymer film layers having cavities with fluid and used advantageously for displaying purposes.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

L'invention concerne un procédé (200) destiné à pratiquer un trou ou une ouverture (201, 202) dans un composant (203), comme un cadran de montre, comportant des couches protectrices (205, 206) et une couche (204) d'affichage disposée entre lesdites couches protectrices, ladite couche d'affichage comportant des cavités renfermant un fluide, comme une couche (204) de papier pour encre électrophorétique. Le premier trou (201, 301) est réalisé au moins partiellement à travers la couche d'affichage (204) et un matériau (213) d'étanchéité à l'humidité est placé en contact avec le premier trou (201) afin d'étanchéifier la surface du trou (201) de la couche (204) de papier pour encre électrophorétique. Le matériau (213) d'étanchéité à l'humidité diffère du matériau des couches protectrices (205, 206).
PCT/IB2014/058401 2014-01-20 2014-01-20 Procédé de réalisation d'une ouverture dans un composant, et composant associé Ceased WO2015107395A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2014/058401 WO2015107395A1 (fr) 2014-01-20 2014-01-20 Procédé de réalisation d'une ouverture dans un composant, et composant associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2014/058401 WO2015107395A1 (fr) 2014-01-20 2014-01-20 Procédé de réalisation d'une ouverture dans un composant, et composant associé

Publications (1)

Publication Number Publication Date
WO2015107395A1 true WO2015107395A1 (fr) 2015-07-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/058401 Ceased WO2015107395A1 (fr) 2014-01-20 2014-01-20 Procédé de réalisation d'une ouverture dans un composant, et composant associé

Country Status (1)

Country Link
WO (1) WO2015107395A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020118982A (ja) * 2016-05-31 2020-08-06 イー インク コーポレイション 伸展可能電気光学ディスプレイ

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080123178A1 (en) * 2006-11-28 2008-05-29 Seiko Epson Corporation Electro-optical device, method of manufacturing electro-optical device and electronic apparatus
JP2008225038A (ja) * 2007-03-13 2008-09-25 Seiko Epson Corp 電気泳動式表示パネル及び電気泳動式表示パネルの製造方法
JP2009217128A (ja) * 2008-03-12 2009-09-24 Seiko Epson Corp 電気泳動表示装置及び電子機器
EP2163945A1 (fr) * 2008-09-11 2010-03-17 Seiko Epson Corporation Dispositif d'affichage électrophorétique, procédé de fabrication pour un dispositif d'affichage électrophorétique et montre-bracelet
WO2013062707A1 (fr) * 2011-10-28 2013-05-02 Apple Inc. Dispositif d'affichage à trous d'interconnexion pour fixation de circuits imprimés et de composants dissimulés

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080123178A1 (en) * 2006-11-28 2008-05-29 Seiko Epson Corporation Electro-optical device, method of manufacturing electro-optical device and electronic apparatus
JP2008225038A (ja) * 2007-03-13 2008-09-25 Seiko Epson Corp 電気泳動式表示パネル及び電気泳動式表示パネルの製造方法
JP2009217128A (ja) * 2008-03-12 2009-09-24 Seiko Epson Corp 電気泳動表示装置及び電子機器
EP2163945A1 (fr) * 2008-09-11 2010-03-17 Seiko Epson Corporation Dispositif d'affichage électrophorétique, procédé de fabrication pour un dispositif d'affichage électrophorétique et montre-bracelet
WO2013062707A1 (fr) * 2011-10-28 2013-05-02 Apple Inc. Dispositif d'affichage à trous d'interconnexion pour fixation de circuits imprimés et de composants dissimulés

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020118982A (ja) * 2016-05-31 2020-08-06 イー インク コーポレイション 伸展可能電気光学ディスプレイ

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