WO2011145901A2 - Papier électronique et son procédé de fabrication - Google Patents

Papier électronique et son procédé de fabrication Download PDF

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Publication number
WO2011145901A2
WO2011145901A2 PCT/KR2011/003721 KR2011003721W WO2011145901A2 WO 2011145901 A2 WO2011145901 A2 WO 2011145901A2 KR 2011003721 W KR2011003721 W KR 2011003721W WO 2011145901 A2 WO2011145901 A2 WO 2011145901A2
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WO
WIPO (PCT)
Prior art keywords
ferroelectric
electronic paper
substrate
lower substrate
electrode
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PCT/KR2011/003721
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English (en)
Korean (ko)
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WO2011145901A3 (fr
Inventor
박병은
Original Assignee
서울시립대학교산학협력단
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Priority claimed from KR1020100046915A external-priority patent/KR101678692B1/ko
Priority claimed from KR1020110038904A external-priority patent/KR20120121121A/ko
Application filed by 서울시립대학교산학협력단 filed Critical 서울시립대학교산학협력단
Publication of WO2011145901A2 publication Critical patent/WO2011145901A2/fr
Publication of WO2011145901A3 publication Critical patent/WO2011145901A3/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 
    • G02F1/165—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
    • G02F1/1676—Electrodes
    • 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 
    • G02F1/165—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
    • G02F1/1671—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 involving dry toners
    • 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
    • G02F1/1681—Gaskets; Spacers; Sealing of cells; Filling or closing of cells having two or more microcells partitioned by walls, e.g. of microcup type

Definitions

  • the present invention relates to electronic paper, and more particularly, to an electronic paper and a method of manufacturing the same, which are capable of providing a stable display effect using ferroelectric materials.
  • the conventional display apparatuses are all designed to receive and output a video signal such as RGB, and have a disadvantage in that the size of the apparatus is large, heavy, and very high.
  • This electronic paper is produced by making upper and lower electrodes on a plastic substrate and filling, for example, positive and negatively charged toner particles in the space while forming a partition between the two electrodes.
  • Electronic paper has attracted much attention as a next-generation display means because it has the advantage of having a good resolution such as displayed characters and a wide viewing angle.
  • the conventional electronic paper has a disadvantage in that the display image does not last long when the power is cut off from the upper and lower electrodes because the display is performed using charged toner particles, and is greatly affected by external static electricity.
  • the conventional electronic paper has a problem in that the manufacturing process is complicated because the electrodes must be formed on the upper and lower substrates respectively, and the manufacturing cost is high because the ITO electrode or the like having good transparency is used as the upper electrode.
  • the present invention has been made in view of the above circumstances, and a technical object of the present invention is to provide an electronic paper and a method for manufacturing the same, wherein the manufacturing process is simple, stable and provides a clear display screen.
  • Electronic paper according to the first aspect of the present invention for achieving the above object is a lower substrate, an upper substrate made of a transparent material, a plurality of partitions are provided between the lower substrate and the upper substrate to form a plurality of cell spaces, Comprising a positive or negatively charged fine particles filled in the cell space, and a ferroelectric layer formed in the lower portion of the cell space, and aligning the positive or negatively charged fine particles to the upper or lower side of the cell space It is characterized by comprising a drive means for.
  • the electronic paper according to the second aspect of the present invention is a microcapsule provided with a lower substrate, an upper substrate made of a transparent material, between the lower substrate and the upper substrate, and provided with fine or positively charged particles therein.
  • the electronic paper according to the third aspect of the present invention is provided between the lower substrate, the upper substrate made of a transparent material, the lower substrate and the upper substrate, and has a spherical shape, and has one hemisphere portion and the other hemisphere of the sphere.
  • the part is provided with a rotating ball that is charged at different potentials and colored in different colors, and is formed under the rotating ball, and has a ferroelectric layer, and is provided with driving means for rotationally driving the rotating ball. It is characterized by.
  • the driving means may include a lower electrode formed on the lower substrate, a ferroelectric layer formed on the lower electrode, and an upper electrode formed on the ferroelectric layer.
  • the ferroelectric layer is characterized in that it is composed of at least one of a ferroelectric inorganic material and a ferroelectric organic material or a mixture of organic materials.
  • the ferroelectric layer is characterized by consisting of a mixture of ferroelectric material and metal.
  • the metal is characterized in that the iron (Fe).
  • the upper electrode is characterized in that it is formed in a direction orthogonal to the lower electrode.
  • the ferroelectric layer is characterized in that formed in the intersection region of the upper electrode and the lower electrode.
  • the ferroelectric layer is characterized in that the entire coating is formed on the lower substrate on which the lower electrode is formed.
  • the lower substrate is characterized in that consisting of paper.
  • the lower substrate is characterized in that the organic material.
  • the lower electrode or the upper electrode is characterized in that it is composed of at least one of a conductive organic material, a mixture of a conductive organic material or a compound.
  • the method of manufacturing an electronic paper according to a fourth aspect of the present invention comprises the steps of preparing a lower substrate, forming a lower electrode on the lower substrate, forming a ferroelectric layer on the lower electrode, the ferroelectric Forming an upper electrode on the layer, forming a cell space by forming a partition on the structure on which the upper electrode is formed, filling fine particles in the cell space, and forming an upper substrate on the cell space Characterized in that it comprises a step.
  • the lower substrate is characterized in that the paper.
  • the lower substrate is characterized in that the organic material.
  • the lower electrode or the upper electrode is characterized in that the conductive organic material, a mixture or a compound of the conductive organic material.
  • the lower electrode or the upper electrode is characterized in that it is formed through any one method of inkjet, spin coating method or screen printing.
  • the formation of the ferroelectric layer is characterized in that it comprises a step of forming a mixture of ferroelectric inorganic material and ferroelectric organic material, and forming a ferroelectric layer using the mixture.
  • the formation of the ferroelectric layer is characterized in that it comprises a step of forming a mixture of ferroelectric inorganic and organic material, and forming a ferroelectric layer using the mixture.
  • the ferroelectric layer may be formed by mixing a ferroelectric inorganic material and a metal to form a mixture, and forming a ferroelectric layer using the mixture.
  • the metal is characterized in that the iron (Fe).
  • the forming of the partition wall may include forming a photoresist layer on the structure on which the upper electrode is formed, curing the photoresist layer, and etching a portion of the cured photoresist layer corresponding to the cell space. Characterized in that comprises a step.
  • the electronic paper according to the fifth aspect of the present invention includes a lower substrate, an upper substrate made of a transparent material, a plurality of partition walls installed between the lower substrate and the upper substrate to form a plurality of cell spaces, and filled in the cell space.
  • it is characterized in that it comprises a positive or negatively charged fine particles, and a ferroelectric layer which is formed in the lower portion of the cell space and aligns the positive or negatively charged fine particles to the upper or lower side of the cell space.
  • Electronic paper according to a sixth aspect of the present invention is a microcapsule provided with a lower substrate, an upper substrate made of a transparent material, between the lower substrate and the upper substrate, and provided with fine or positively charged particles therein; Formed under the microcapsule, characterized in that it comprises a ferroelectric layer for aligning the positive or negatively charged fine particles provided inside the microcapsule to the upper or lower side of the microcapsule.
  • Electronic paper according to a seventh aspect of the present invention is provided between the lower substrate, the upper substrate made of a transparent material, the lower substrate and the upper substrate and has a spherical shape, one side hemisphere portion and the other half hemisphere portion of the sphere is It is characterized in that it comprises a rotating ball that is charged to different potentials and colored in different colors, and a ferroelectric layer formed on the lower portion of the rotating ball to drive the rotating ball.
  • separate driving means are provided for each cell unit constituting the pixel, and these driving means drive the charged particles continuously filled in the cell space even when the power is cut off. Therefore, even when static electricity or the like is applied through the outside of the electronic paper, a character or an image screen provided through the electronic paper is always kept stable.
  • FIG. 1 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to a first embodiment of the present invention.
  • Figure 2 is a cross-sectional view showing the manufacturing process of the electronic paper according to an embodiment of the present invention.
  • FIG. 3 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to a second embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to a third embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to a fourth embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to a fifth embodiment of the present invention.
  • FIG. 7 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to a sixth embodiment of the present invention.
  • FIG. 1 shows a cross-sectional structure of an electronic paper according to a first embodiment of the present invention, which shows an example in which the present invention is applied to a dry electronic paper using collision charging type or electrophoresis.
  • reference numeral 1 is a lower substrate.
  • the lower substrate 1 may be composed of an organic material such as a general Si, Ge wafer, glass, or plastic having flexibility.
  • the organic materials usable here include, for example, polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyetheretherketone (PEEK), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), poly Vinyl chloride (PVC), polyethylene (PE), ethylene copolymer, polypropylene (PP), propylene copolymer, poly (4-methyl-1-pentene) (TPX), polyarylate (PAR), polyacetal (POM ), Polyphenylene oxide (PPO), polysulfone (PSF), polyphenylene sulfide (PPS), polyvinylidene chloride (PVDC), polyvinyl acetate (PVAC), polyvinyl alcohol (PVAL), polyvinyl acetal, Polystyrene (PS), AS resin, ABS resin, polymethyl methacrylate (PMMA), fluorocarbon resin, phenolic resin (PF), melamine resin (MF), urea resin (
  • the lower substrate 1 may be a paper, a material including a paper, for example, a paper coated with a coding material such as parylene, or a paper coated with or infiltrated with a heat resistant material such as silicon.
  • the lower electrode 2 is formed on the lower substrate 1 by a known method.
  • the lower electrode 2 is based on gold, silver, aluminum, platinum, indium tin compound (ITO), strontium titanate compound (SrTiO 3 ), other conductive metal oxides, alloys and compounds thereof, or conductive polymers.
  • ITO indium tin compound
  • SrTiO 3 strontium titanate compound
  • a mixture of polyaniline, poly (3,4-ethylenedioxythiophene) / polystyrenesulfonate (PEDOT: PSS), a compound, or a multilayered material may be used.
  • ferroelectric layer 3 is formed on the lower electrode 2.
  • ferroelectric material for forming the ferroelectric layer 3 oxide ferroelectrics, fluoride ferroelectrics such as BMF (BaMgF 4 ), inorganic ferroelectrics such as ferroelectric semiconductors, and organic ferroelectrics can be used.
  • oxide ferroelectrics examples include Pseudo-ilmenite ferroelectrics such as Perovskite ferroelectrics such as PZT (PbZr x Ti 1-x O 3 ), BaTiO 3 , and PbTiO 3 , LiNbO 3 , LiTaO 3, and the like.
  • Tungsten-bronze (TB) ferroelectrics such as PbNb 3 O 6 , Ba 2 NaNb 5 O 15 , SBT (SrBi 2 Ta 2 O 9 ), BLT ((Bi, La) 4 Ti 3 O 12 ), Bi 4 Ti 3 O Bismuth layered ferroelectrics such as 12 and Pyrochlore ferroelectrics such as La 2 Ti 2 O 7 and solid solutions of these ferroelectrics, as well as Y, Er, Ho, Tm, Yb, Lu, etc.
  • RMnO 3 containing rare earth element (R), PGO (Pb 5 Ge 3 O 11 ), BFO (BiFeO 3 ), and the like.
  • ferroelectric semiconductors examples include Group 2-6 compounds such as CdZnTe, CdZnS, CdZnSe, CdMnS, CdFeS, CdMnSe, and CdFeSe.
  • polyvinylidene fluoride for example, polyvinylidene fluoride (PVDF), a polymer, a copolymer, or a terpolymer containing the PVDF is included.
  • PVDF polyvinylidene fluoride
  • an odd number of nylons, cyano polymers, polymers thereof and air Coalescing and the like is included.
  • the ferroelectric material may be a mixture of ferroelectric minerals and organics, a mixture of ferroelectric inorganics and ferroelectric organics, a mixture of solid solutions and organics of ferroelectric inorganics, a mixture of solid solutions of ferroelectric inorganics and ferroelectric organics, a mixture of ferroelectric inorganics and ferroelectric inorganics, for example, Fe A mixture of metals, silicides, or silicates such as these may be used.
  • ferroelectric material a mixture of a metal such as Fe mixed with a ferroelectric inorganic material such as PZT may be used as the ferroelectric material.
  • organic material mixed with the ferroelectric inorganic material a general monomer, oligomer, polymer, copolymer, preferably an organic material having a high dielectric constant may be used.
  • Organic materials with high dielectric constants include polyvinyl pyrrolidone (PVP), polycarbonate (PC), polyvinyl chloride (PVC), polystyrene (PS), epoxy (epoxy), polymethyl methacrylate (PMMA), polyimide (PI), polyehylene (PE), PVA (polyvinyl alcohol), nylon 66 (polyhezamethylene adipamide), PEKK (polytherketoneketone) and the like.
  • PVP polyvinyl pyrrolidone
  • PC polycarbonate
  • PVC polyvinyl chloride
  • PS polystyrene
  • epoxy epoxy
  • PMMA polymethyl methacrylate
  • PI polyimide
  • PE polyehylene
  • PVA polyvinyl alcohol
  • nylon 66 polyhezamethylene adipamide
  • PEKK polytherketoneketone
  • the organic materials mixed with ferroelectric water include fluorinated para-xylene, fluoropolyarylether, fluorinated polyimide, polystyrene, poly ( ⁇ -methyl styrene). (poly ( ⁇ -methyl styrene)), poly ( ⁇ -vinylnaphthalene), poly (vinyltoluene), polyethylene, cis-polybutadiene -polybutadiene, polypropylene, polyisoprene, poly (4-methyl-1-pentene), poly (tetrafluoroethylene) (poly (tetrafluoroethylene) )), Poly (chlorotrifluoroethylene), poly (2-methyl-1,3-butadiene) (poly (2-methyl-1,3-butadiene)), poly (p-xylyl (Poly (p-xylylene)), poly ( ⁇ - ⁇ - ⁇ '- ⁇ '-tetrafluoro-p-xylylene) (poly
  • conjugated hydrocarbon polymers such as polyacene, polyphenylene, poly (phenylene vinylene), polyfluorene, and oligomers of such conjugated hydrocarbons.
  • Condensed aromatic hydrocarbons such as anthracene, tetratracene, chrysene, pentacene, pyrene, perylene and coronene; oligomeric para substitutions such as p-quaterphenyl (p-4P), p-quinquephenyl (p-5P), p-sexiphenyl (p-6P) Oligomeric para substituted phenylenes;
  • inorganic ferroelectric materials have high dielectric constants but high formation temperatures.
  • organic material including the organic ferroelectric material has a low dielectric constant while its formation temperature is very low. Therefore, when the inorganic ferroelectric material and the organic or organic ferroelectric material are mixed, the ferroelectric material having a very high dielectric constant and having a very low formation temperature can be obtained.
  • an upper electrode 4 is provided on the ferroelectric layer 3 in a direction orthogonal to the lower electrode 2.
  • the upper electrode 4 is based on gold, silver, aluminum, platinum, indium tin compound (ITO), strontium titanate compound (SrTiO 3 ), other conductive metal oxides, alloys and compounds thereof, or conductive polymers.
  • ITO indium tin compound
  • SrTiO 3 strontium titanate compound
  • a mixture of polyaniline, poly (3,4-ethylenedioxythiophene) / polystyrenesulfonate (PEDOT: PSS), a compound, or a multilayered material may be used.
  • an insulating layer may be provided on the upper electrode 4 to prevent the upper electrode 4 from directly contacting the fine particles 6.
  • a plurality of partitions 5 are formed on the upper and lower electrodes 2 and 4 to partition each cell.
  • This partition 5 is produced by, for example, UV curing the photoresist and then etching it appropriately.
  • fine particles 6 such as toner particles or metal nano particles are filled.
  • the fine particles injected into the cell space include, for example, white and black particles, among which, for example, the white particles are set to a negatively charged state and the black particles are positively charged.
  • an upper substrate 7 made of, for example, glass or a transparent material organic material is provided above the partition 5 and the cell space.
  • the conventional electronic paper drives electrodes charged in the cell space by placing electrodes at the lower and upper portions of the cell space consisting of the partition walls 5 and applying a voltage to these electrodes.
  • a driving means for driving the fine particles 6 filled in the cell space under the cell space, that is, on the lower substrate 1, is provided.
  • This drive means is comprised with the lower electrode 2 and the upper electrode 4, and the ferroelectric layer 3 located between these electrodes 2,4.
  • the ferroelectric layer 3 When voltage is applied to the ferroelectric layer 3 through the lower electrode 2 and the upper electrode 4, the ferroelectric layer 3 is polarized to generate a polarized electric field from the ferroelectric layer 3.
  • the direction of the polarized electric field is changed depending on the voltage applied to the lower electrode 2 and the upper electrode 4. For example, when a predetermined positive voltage (+) is applied to the upper electrode 4 while the lower electrode 2 is grounded, a positive electric field is generated in an upward direction, and the lower electrode 2 is grounded.
  • a negative voltage (-) is applied to the upper electrode 4, a negative electric field is generated in the upward direction. Then, once the ferroelectric layer 3 is polarized, the generation of the electric field is continuously maintained even when the voltages applied to the lower and upper electrodes 2 and 4 are interrupted.
  • the driving means including the lower and upper electrodes 2 and 4 and the ferroelectric layer 3 are driven to generate an electric field in a predetermined direction from the driving means.
  • a method of selectively driving the driving means included in each cell space enables displaying of a character or an image having a desired shape on the upper side of the electronic paper composed of a plurality of cells.
  • a separate transparent electrode is not provided on the upper substrate 7.
  • Transparent electrodes are usually very expensive and can affect the transparency of the upper substrate 7. Therefore, in the above embodiment, it is possible to provide a clearer text or video screen than in the related art, and to lower the manufacturing price thereof.
  • FIG. 2 is a cross-sectional view for each step illustrating a manufacturing step of the electronic paper shown in FIG. 1.
  • FIG. 2 is a cross-sectional view for each step illustrating a manufacturing step of the electronic paper shown in FIG. 1.
  • the lower substrate 1 is prepared, and as shown in FIG. 2B, the lower electrode 2 made of a conductive metal or an organic material is formed on the lower substrate 1.
  • a ferroelectric layer 3 made of a ferroelectric material is formed on the lower electrode 3.
  • the ferroelectric layer 3 may be formed only in a region where the lower electrode 3 and the upper electrode 4 cross each other, or may be formed on the lower substrate 1 and the lower electrode 2 as a whole.
  • the ferroelectric layer 3 In the formation of the ferroelectric layer 3, vacuum deposition, inkjet, spin coating, or screen printing can be used. In the case of using an inorganic substance as the ferroelectric material, the ferroelectric layer 3 can be preferably formed by vacuum deposition. In addition, in the case of using a mixture of inorganic and organic materials as the ferroelectric material, a mixed solution is produced using the ferroelectric inorganic material and the organic material or the ferroelectric organic material, and then the ferroelectric layer 3 is formed by inkjet, spin coating, or screen printing. can do.
  • the following method can be used to generate the mixed solution.
  • the mixing ratio of the inorganic material and the organic material can be appropriately set as necessary. If the mixing ratio of the ferroelectric inorganic material is increased, the dielectric constant of the mixture is increased while the formation temperature is high, and if the mixing ratio of the ferroelectric inorganic material is low, the dielectric constant of the mixture is low while the formation temperature is low.
  • the upper electrode 4 is formed on the ferroelectric layer 3 as shown in FIG. 2D.
  • the upper electrode 4 is arranged in the direction orthogonal to the lower electrode 2.
  • partition walls 5 for forming a cell space are formed on the lower electrode 2 and the upper electrode 4, for example, using photoresist.
  • an insulating layer may be formed on the upper electrode 4 to prevent the upper electrode 4 from directly contacting the fine particles 6.
  • the present invention has been described using the present invention applied to the dry electronic paper using the collision charging type or electrophoresis as an example, the present invention can be applied to the electronic paper of other structures and methods in the same manner. have.
  • FIG 3 is a cross-sectional view showing the structure of an electronic paper according to a second embodiment of the present invention, which shows an example in which the present invention is applied to an electronic paper using a microcapsule.
  • the lower substrate 1 and the upper substrate 7 are respectively provided on the lower side and the upper side of the cavity filled with the fluid, and the lower electrode 2 and the ferroelectric on the lower substrate 1 as in FIG. 1 described above.
  • a drive means comprising a layer 3 and an upper electrode 4 is provided.
  • the microcapsules 30 having the positive and negatively charged particles 31 are dispersed.
  • the charged particles 31 inside the microcapsules 30 are aligned up and down according to the driving of the driving means provided on the lower substrate 1 to generate a specific character or image.
  • FIG. 4 is a cross-sectional view showing a structure of an electronic paper according to a third embodiment of the present invention, which shows an example in which the present invention is applied to an electronic paper using a rotating ball.
  • a rotating ball 40 is provided between the lower substrate 1 and the upper substrate 7, and the lower electrode 2 and the ferroelectric layer 3 are disposed on the lower substrate 1 as in FIG. 1.
  • a drive means comprising the upper electrode 4 is provided.
  • One side hemisphere portion is positively charged, for example, while the other half hemisphere portion is negatively charged.
  • the positively charged portions and negatively-charged portions are colored in different colors, for example, black or white.
  • the metal nanoparticle 6, the microcapsule 30, or the rotating ball 40 are disposed on the upper side of the driving means composed of the lower electrode 2, the ferroelectric layer 3, and the upper electrode 4.
  • the structure of installing is described as an example, the structure of installing the metal nanoparticle 6, the microcapsule 30, or the rotating ball 40 between the ferroelectric layer 3 and the upper electrode 4 is also the same. Can be employed.
  • FIG. 5 is a cross-sectional view showing the structure of an electronic paper according to a fourth embodiment of the present invention.
  • the lower electrode 2 is provided on the lower substrate 1, and the ferroelectric layer 3 is formed above the lower electrode 2.
  • a plurality of partitions 5 are formed on the lower electrode 2 and the ferroelectric layer 3 to partition each cell. In the cell space formed by the partitions 5, fine particles 6 such as toner particles or metal nano particles are filled.
  • an upper electrode 4 is provided above the partition 5 and the cell space in a direction orthogonal to the lower electrode 2.
  • this upper electrode 4 Preferably, it consists of transparent electrodes, such as ITO and IZO.
  • an insulating layer may be provided below the upper electrode 4 to prevent the upper electrode 4 and the fine particles 5 from directly contacting each other.
  • the upper substrate 7 is provided on the upper side of the upper electrode 4, for example, made of glass or an organic material of a transparent material.
  • the ferroelectric layer 3 when a voltage is applied to the ferroelectric layer 3 through the lower electrode 2 and the upper electrode 4, the ferroelectric layer 3 is polarized to generate a polarized electric field from the ferroelectric layer 3.
  • the direction of the polarized electric field is changed depending on the voltage applied to the lower electrode 2 and the upper electrode 4. That is, when a predetermined positive voltage (+) is applied to the upper electrode 4 while the lower electrode 2 is grounded, a positive electric field is generated in an upward direction, and the upper electrode is grounded when the lower electrode 2 is grounded.
  • negative voltage (-) is applied to (4), negative electric field is generated in the upward direction. Then, once the ferroelectric layer 3 is polarized, the generation of the electric field is continuously maintained even when the voltages applied to the lower and upper electrodes 2 and 4 are interrupted.
  • the driving means Under the cell space, that is, the ferroelectric layer 3 composed of a plurality of partition walls 5, the positive or negatively charged black is filled in the cell space.
  • the white charged particles 6 are aligned above and below.
  • a method of selectively driving the driving means included in each cell space enables displaying of a character or an image having a desired shape on the upper side of the electronic paper composed of a plurality of cells.
  • FIG. 5 can be applied in the same manner to the embodiment shown in FIGS. 3 and 4.
  • 6 and 7 are cross-sectional views illustrating a case where the embodiment shown in FIG. 5 is applied to the embodiment shown in FIGS. 3 and 4, respectively. 6 and 7, the microcapsules 30 and the rotating balls 40 are provided between the upper electrode 4 and the ferroelectric layer 3, respectively.
  • the same reference numerals are given to the parts substantially the same as those in Figs. 3 to 5, and the detailed description thereof will be omitted.
  • the structure consisting of the lower electrode 2, the ferroelectric layer 3 and the upper electrode 4 as driving means formed on the lower substrate 1 has been described as an example.
  • Other types of driving means capable of providing an electric field in a predetermined direction to the charged particles or the charged spheres existing between the lower substrate 1 and the upper substrate 7 may be employed in the same manner.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

La présente invention porte sur un papier électronique capable d'offrir un effet d'affichage stable à l'aide d'un matériau ferroélectrique, et sur son procédé de fabrication. Selon la présente invention, un papier électronique comprend : un substrat inférieur ; un substrat supérieur fait d'un matériau transparent ; une pluralité de cloisons de séparation placées entre le substrat inférieur et le substrat supérieur pour former une pluralité d'espaces cellulaires ; de fines particules qui remplissent les espaces cellulaires et sont chargées d'électricité positive ou négative ; et un moyen d'excitation qui est placé sous les espaces cellulaires et dispose les fines particules chargées positivement ou négativement au niveau d'une partie supérieure ou d'une partie inférieure des espaces cellulaires.
PCT/KR2011/003721 2010-05-19 2011-05-19 Papier électronique et son procédé de fabrication WO2011145901A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2010-0046915 2010-05-19
KR1020100046915A KR101678692B1 (ko) 2010-05-19 2010-05-19 전자 종이 및 그 제조방법
KR10-2011-0038904 2011-04-26
KR1020110038904A KR20120121121A (ko) 2011-04-26 2011-04-26 전자 종이 및 그 제조방법

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WO2011145901A2 true WO2011145901A2 (fr) 2011-11-24
WO2011145901A3 WO2011145901A3 (fr) 2012-02-23

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CN110010080B (zh) * 2018-01-05 2020-11-17 元太科技工业股份有限公司 电泳显示器及其驱动方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195603A2 (fr) * 2000-10-04 2002-04-10 Seiko Epson Corporation Appareil d'électrophorèse et méthode pour le fabriquer
KR20070077461A (ko) * 2006-01-23 2007-07-26 세이코 엡슨 가부시키가이샤 전기 영동 표시 시트, 전기 영동 표시 장치, 및 전자 기기
KR20080052022A (ko) * 2006-12-07 2008-06-11 한국전자통신연구원 전기영동방식의 디스플레이장치 및 제조방법
KR20090066534A (ko) * 2007-12-20 2009-06-24 삼성전자주식회사 전기영동 표시 소자 및 그 구동 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195603A2 (fr) * 2000-10-04 2002-04-10 Seiko Epson Corporation Appareil d'électrophorèse et méthode pour le fabriquer
KR20070077461A (ko) * 2006-01-23 2007-07-26 세이코 엡슨 가부시키가이샤 전기 영동 표시 시트, 전기 영동 표시 장치, 및 전자 기기
KR20080052022A (ko) * 2006-12-07 2008-06-11 한국전자통신연구원 전기영동방식의 디스플레이장치 및 제조방법
KR20090066534A (ko) * 2007-12-20 2009-06-24 삼성전자주식회사 전기영동 표시 소자 및 그 구동 방법

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