KR20120121121A - E-Papar ane method of manufacturing the same - Google Patents

E-Papar ane method of manufacturing the same Download PDF

Info

Publication number
KR20120121121A
KR20120121121A KR1020110038904A KR20110038904A KR20120121121A KR 20120121121 A KR20120121121 A KR 20120121121A KR 1020110038904 A KR1020110038904 A KR 1020110038904A KR 20110038904 A KR20110038904 A KR 20110038904A KR 20120121121 A KR20120121121 A KR 20120121121A
Authority
KR
South Korea
Prior art keywords
electronic paper
ferroelectric
substrate
electrode
ferroelectric layer
Prior art date
Application number
KR1020110038904A
Other languages
Korean (ko)
Inventor
박병은
Original Assignee
서울시립대학교 산학협력단
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 서울시립대학교 산학협력단 filed Critical 서울시립대학교 산학협력단
Priority to KR1020110038904A priority Critical patent/KR20120121121A/en
Priority to PCT/KR2011/003721 priority patent/WO2011145901A2/en
Publication of KR20120121121A publication Critical patent/KR20120121121A/en

Links

Images

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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • 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
    • G02F2001/1678—Constructional details characterised by the composition or particle type
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/02—Materials and properties organic material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Computer Hardware Design (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

The present invention relates to an electronic paper and a method of manufacturing the same, which are capable of providing a stable display effect using ferroelectric materials. The electronic paper according to 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 spaces. It is characterized in that it comprises a charged fine particles, and a driving means formed in the lower portion of the cell space and to align the positive or negative charged fine particles to the upper or lower side of the cell space.

Description

Electronic paper and its manufacturing method {E-Papar ane method of manufacturing the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention 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.

Currently, various types of display devices such as CRT, LCD, PDP, etc. have been developed and used. 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.

On the other hand, in recent years, display apparatuses called electronic paper have been developed and widely studied. 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.

However, 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.

In addition, 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.

Accordingly, 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, And a ferroelectric layer which is filled in the cell space and positively or negatively charged, 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 side or the lower side of the cell space. It is characterized by.

Electronic paper according to a 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; 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 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, one side hemisphere portion and the other half hemisphere portion of the sphere 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.

An electronic paper according to a fourth aspect of the present invention includes a lower substrate, a lower electrode formed on the lower substrate, an upper substrate made of a transparent material, and an upper electrode formed on the upper substrate and made of a transparent material. And a plurality of partition walls disposed between the lower substrate and the upper substrate to form a plurality of cell spaces, fine particles charged and charged in the cell space, and ferroelectric layers formed on the lower electrodes. It is characterized by.

An electronic paper according to a fifth aspect of the present invention includes a lower substrate, a lower electrode formed on the lower substrate, an upper substrate made of a transparent material, and an upper electrode formed on the upper substrate and made of a transparent material. It is installed between the lower substrate and the upper substrate, characterized in that it comprises a microcapsule having positive or negatively charged fine particles therein, and a ferroelectric layer formed on the upper electrode.

An electronic paper according to a sixth aspect of the present invention includes a lower substrate, a lower electrode formed on the lower substrate, an upper substrate formed of a transparent material, an upper electrode formed on the upper substrate, and between the lower substrate and the upper substrate. In addition to being installed in the shape of a sphere, and having one side hemisphere portion and the other side hemisphere portion of the sphere is charged with different potentials and the rotating ball is colored in different colors, and a ferroelectric layer formed on the lower electrode It is characterized by.

In addition, the upper electrode is characterized by consisting of a conductive organic material or a mixture of a conductive organic material and a conductive inorganic material.

In addition, the ferroelectric layer is characterized in that composed of at least one of a ferroelectric inorganic material and a ferroelectric organic material or a mixture of organic materials.

In addition, the ferroelectric layer is characterized by consisting of a mixture of ferroelectric material and metal.

In addition, the metal is characterized in that the iron (Fe).

In addition, the upper electrode is characterized in that it is formed in a direction orthogonal to the lower electrode.

In addition, an insulating layer is further provided on the upper electrode.

In addition, the ferroelectric layer is characterized in that formed in the intersection region of the upper electrode and the lower electrode.

In addition, the ferroelectric layer is characterized in that the entire coating is formed on the lower substrate on which the lower electrode is formed.

In addition, the lower substrate is characterized in that consisting of paper.

In addition, the lower substrate is characterized in that the organic material.

In addition, the lower electrode is characterized by consisting of at least one of a conductive organic material, a mixture of a conductive organic material or a compound.

According to a seventh aspect of the present invention, there is provided a method of manufacturing an electronic paper, comprising: preparing a lower substrate, forming a lower electrode on the lower substrate, and a ferroelectric layer on the lower electrode. Forming a cell space by forming a barrier rib on the ferroelectric layer formed structure, filling fine particles in the cell space, preparing an upper substrate, and forming an upper electrode on the upper substrate. And coupling an upper substrate on which an upper electrode is formed above the cell space.

In addition, the lower substrate is characterized in that the paper.

In addition, the lower substrate is characterized in that the organic material.

In addition, 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.

In addition, 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.

In addition, the formation of the ferroelectric layer is characterized in that it comprises a step of forming a mixture of the ferroelectric inorganic material and the ferroelectric organic material, and forming a ferroelectric layer using the mixture.

In addition, 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.

In addition, the formation of the ferroelectric layer is characterized in that it comprises a step of forming a mixture by mixing a ferroelectric inorganic material and a metal, and forming a ferroelectric layer using the mixture.

In addition, the metal is characterized in that the iron (Fe).

In addition, the forming of the barrier rib may include forming a photoresist layer on a structure having a lower electrode, curing the photoresist layer, and etching a portion of the cured photoresist layer corresponding to a cell space. Characterized in that comprises a.

In addition, the step of forming an insulating layer on the upper electrode is characterized in that it is configured to further comprise.

According to the present invention having the above-described configuration, 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.

1 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to 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.
3 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to another embodiment of the present invention.
4 is a cross-sectional view showing a cross-sectional structure of an electronic paper according to another embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. However, the embodiments described below show one preferred embodiment of the present invention, and examples of such embodiments are not intended to limit the scope of the present invention. The present invention can be variously modified without departing from the technical idea thereof.

1 illustrates a cross-sectional structure of an electronic paper according to the present invention, which shows an example in which the present invention is applied to a dry electronic paper using collision charge type or electrophoresis.

In FIG. 1, 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 (UF), unsaturated polyester (UP), epoxy resin (EP), diallyl phthalate resin (DAP), polyurethane (PUR), polyamide (PA), silicone resin (SI) or mixtures and combinations thereof Water can be used.

 In addition, 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. For example, a mixture of polyaniline, poly (3,4-ethylenedioxythiophene) / polystyrenesulfonate (PEDOT: PSS), a compound, or a multilayered material may be used.

Subsequently, a ferroelectric layer 3 is formed on the lower electrode 2. As the 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 such as polymer ferroelectrics can be used.

Examples of the oxide ferroelectrics 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.

Examples of the ferroelectric semiconductors include Group 2-6 compounds such as CdZnTe, CdZnS, CdZnSe, CdMnS, CdFeS, CdMnSe, and CdFeSe.

As the polymer ferroelectric, for example, polyvinylidene fluoride (PVDF), a polymer, a copolymer, or a terpolymer containing the PVDF is included. In addition, an odd number of nylons, cyano polymers, polymers thereof and air Coalescing and the like.

The ferroelectric material may be a mixture of ferroelectric minerals and organics, mixtures of ferroelectric minerals and ferroelectric organics, mixtures of solid solutions and organics of ferroelectric minerals, mixtures of solid solutions of ferroelectric minerals and ferroelectric organics, mixtures of ferroelectric inorganics and ferroelectric inorganics or organics. For example, a mixture of metals such as Fe, silicides, or silicates may be used.

Further, preferably, a mixture of a metal such as Fe mixed with a ferroelectric inorganic material such as PZT may be used as the ferroelectric material.

As the 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.

In addition, the organic materials mixed with ferroelectric water include fluorinated para-xylene, fluoropolyarylether, fluorinated polyimide, polystyrene, poly (α-methyl styrene). (poly (α-methyl styrene)), poly (α-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 (α-α-α'-α'-tetrafluoro-p-xylylene) (poly (α-α-α'-α'-tetrafluoro-p- xylylene)), poly [1,1- (2-methyl propane) bis (4-phenyl Carbonate] (poly [1,1- (2-methyl propane) bis (4-phenyl) carbonate]), poly (cyclohexyl methacrylate), poly (chlorostyrene) (poly ( chlorostyrene)), poly (2,6-dimethyl-1,4-phenylene ether) (poly (2,6-dimethyl-1,4-phenylene ether)), polyisobutylene, poly (vinyl cyclo Non-polar organic substances such as hexane) (poly (vinyl cyclohexane)), poly (arylene ether) and polyphenylene, or poly (ethylene / tetrafluoroethylene) (poly (ethylene / tetrafluoroethylene), poly (ethylene / chlorotrifluoroethylene), fluorinated ethylene / propylene copolymer, polystyrene-co-α-methyl styrene (polystyrene-co- α-methyl styrene), ethylene / ethyl acrylate copolymer, poly (styrene / 10% butadiene), poly (styrene / 10% butadiene), poly ( Styrene / 15% butadiene) (poly (styrene / 15% butadiene), poly (styrene / 2,4-dimethylstyrene) (poly (styrene / 2,4-dimethylstyrene), Cytop, Teflon AF, polypropylene-co-1 Low dielectric constant copolymers such as -butene (polypropylene-co-1-butene) and the like can be used.

And other 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; Poly (3-substituted thiophene), poly (3,4-bisubstituted thiophene), polybenzothiophene, poly Isothianaphthene, poly (N-substituted pyrrole), poly (3-substituted pyrrole), poly (3,4-disubstituted pyrrole) ) (poly (3,4-bisubstituted pyrrole)), polyfuran, polypyridine, poly-1,3,4-oxadiazoles, polyiso Polyisothianaphthene, poly (N-substituted aniline), poly (2-substituted aniline), poly (2-substituted aniline), poly (3-substituted aniline) (poly Conjugated heterocyclic polymers such as (3-substituted aniline), poly (2,3-bisubstituted aniline), polyazulene, polypyrene; Pyrazoline compounds; Polyselenophene; Polybenzofuran; Polyindole; Polypyridazine; Benzidine compounds; Stilbene compounds; Triazines; Substituted metallo- or metal-free porphines, phthalocyanines, fluorophthalocyanines, naphthalocyanines or fluoronaphthalocyanines; C 60 and C 70 fullerenes; N, N'-dialkyl, substituted dialkyl, diaryl or substituted diaryl-1,4,5,8-naphthalenetetracarboxylic diimide (N, N'-dialkyl, substituted dialkyl, diaryl or substituted diaryl-1,4,5,8-naphthalenetetracarboxylic diimide) and fluorinated derivatives; N, N'-dialkyl, substituted dialkyl, diaryl or substituted diaryl 3,4,9,10-perylenetetracarboxylic diimide (N, N'-dialkyl, substituted dialkyl, diaryl or substituted diaryl 3,4,9,10-perylenetetracarboxylic diimide); Bathophenanthroline; Diphenoquinones; 1,3,4-oxadiazoles (1,3,4-oxadiazoles); 11,11,12,12-tetracyanonaphtho-2,6-quinodimethane (11,11,12,12-tetracyanonaptho-2,6-quinodimethane); α, α'-bis (dithieno [3,2-b2 ', 3'-d] thiophene) (α, α'-bis (dithieno [3,2-b2', 3'-d] thiophene) ); 2,8-dialkyl, substituted dialkyl, diaryl or substituted diaryl anthrathiothiophenes (2,8-dialkyl, substituted dialkyl, diaryl or substituted diaryl anthradithiophene); Organic groups such as 2,2'-bibenzo [1,2-b: 4,5-b '] dithiophene (2,2'-bibenzo [1,2-b: 4,5-b'] dithiophene) Semi-conducting materials or their compounds, oligomers and compound derivatives can be used.

In general, inorganic ferroelectric materials have high dielectric constants but high formation temperatures. In addition, the 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.

A plurality of barrier ribs 4 are formed on the lower electrode 2 and the ferroelectric layer 3 to partition each cell. This partition 4 is produced, for example, by a method of UV curing the photoresist and then etching appropriately.

In the cell space formed by the partitions 4, fine particles 5 such as toner particles or metal nano particles are filled. At this time, 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.

Subsequently, an upper electrode 6 is provided above the partition 5 and the cell space in a direction orthogonal to the lower electrode 2. The upper electrode 6 is preferably composed of a transparent electrode such as ITO or IZO.

In addition, an insulating layer may be provided below the upper electrode 6 to prevent the upper electrode 6 and the fine particles 5 from directly contacting each other.

The upper substrate 7 is provided on the upper electrode 6, for example, which is made of organic material of glass or transparent material.

Hereinafter, the operation of the electronic paper having the above structure will be described.

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. In the present invention, on the other hand, the ferroelectric layer 3 is provided as a driving means for continuously providing a polarized electric field to the fine particles 6 filled in the cell space under the cell space, that is, the lower substrate 1. .

When voltage is applied to the ferroelectric layer 3 through the lower electrode 2 and the upper electrode 6, 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 6. For example, when a predetermined positive voltage (+) is applied to the upper electrode 6 while the lower electrode 2 is grounded, a positive electric field is generated in an upward direction, and the lower electrode 2 is grounded. When a negative voltage (-) is applied to the upper electrode 6, a negative electric field is generated in the upward direction. 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 6 are interrupted.

When a field is generated from the driving means under the cell space, that is, the ferroelectric layer 3 composed of a plurality of barrier ribs 4, that is, positive or negatively charged black is filled in the cell space. The white charged particles 5 are aligned above and below.

Accordingly, 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.

In the above structure, separate driving means are provided for each cell constituting the pixel, and these driving means drive the charged particles 6 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. 2 is a cross-sectional view for each step illustrating a manufacturing step of the electronic paper shown in FIG. 1. FIG.

First, as shown in FIG. 2A, 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.

Next, as shown in FIG. 2C, a ferroelectric layer 3 made of a ferroelectric material is formed on the lower electrode 3. In this case, the ferroelectric layer 3 may be formed only in a region where the lower electrode 3 and the upper electrode 6 cross each other, or may be formed entirely on the lower substrate 1 and the lower electrode 2.

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.

1. After mixing inorganic powder and organic powder, dissolve it in solvent to produce mixed solution.

2. Dissolve organic powder in mineral solution to produce mixed solution.

3. Dissolve the inorganic powder in the organic solution to produce a mixed solution.

4. Mix the inorganic and organic solutions to form a mixed solution.

In the above manner, 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.

Next, as shown in FIG. 2D, barrier ribs 4 are formed on the lower electrode 2 and the ferroelectric layer 3 to form a cell space using, for example, a photoresist.

In addition, an upper structure filled with positive (+) and negative (-) charged toner or metal nanoparticles (5) in a cell space constituted by the barrier ribs (4), and formed of a transparent material on the lower structure, for example. The electronic paper is completed by bonding using an adhesive or the like.

In addition, the upper structure is formed by forming an upper electrode 6 made of a transparent conductive material on the upper substrate 7 made of a transparent material as in a conventional method. At this time, the upper electrode is arranged in a direction orthogonal to the lower electrode (2).

In addition, a transparent conductive organic material may be used as the upper substrate 7, and a conductive organic material, or a mixture of conductive organic materials and conductive inorganic materials may be used as the upper electrode 6.

In addition, an insulating layer may be selectively formed on the upper electrode 6, that is, the cell space, to prevent direct contact between the nanoparticles 5 and the upper electrode 6.

On the other hand, the embodiment 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.

3 is a cross-sectional view showing an example in which the present invention is applied to an electronic paper using a microcapsule.

In FIG. 3, the lower substrate 1, the lower electrode 2, the upper substrate 7, and the upper electrode 6 are provided on the lower side and the upper side of the cavity filled with fluid, and the above-described lower electrode 2 is described above. As in Fig. 1, the ferroelectric layer 3 is provided as a driving means. In addition, inside the cavity, the microcapsules 30 having the positive and negatively charged particles 31 are dispersed.

In this embodiment, 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.

4 is a cross-sectional view showing the case where the present invention is applied to an electronic paper using a rotating ball as an example.

In FIG. 4, a rotating ball 40 is provided between the lower electrode 2 and the upper electrode 6, and the ferroelectric layer 3 is provided on the lower electrode 2 as in FIG. 1. Drive means are installed. 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.

In this embodiment, as the rotary ball 40 rotates according to the driving of the driving means provided on the lower substrate 1, white or black portions are aligned upward to generate a specific character or image.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment and can be implemented in various modifications. That is, for example, in the above-described embodiment, an electronic paper that provides a black and white image by configuring one pixel in one cell space is described. However, one pixel is R (Red), G (Green), B ( It is possible to implement a color image through electronic paper by configuring three cells of Blue).

In addition, in the above-described embodiment, the structure using the ferroelectric layer 3 as the driving means formed on the lower substrate 1 has been described as an example, but the present invention is provided between the lower substrate 1 and the upper substrate 7. Other forms of drive means capable of providing a constant electric field to the charged particles or charged spheres present may be employed in the same manner.

1: lower substrate, 2: lower electrode,
3: ferroelectric layer, 4: bulkhead,
5: fine particles, 6: upper electrode,
7: upper substrate.

Claims (50)

Lower substrate,
An upper substrate composed 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,
Positive and negatively charged fine particles filled in the cell space,
And a ferroelectric layer formed below the cell space and aligning the positive or negatively charged fine particles to the upper side or the lower side of the cell space. Lower substrate,
An upper substrate composed of a transparent material,
A microcapsule installed between the lower substrate and the upper substrate, the microcapsules having positive or negatively charged microparticles therein;
Electronic paper, characterized in that formed on the lower portion of the microcapsule and provided with 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. Lower substrate,
An upper substrate composed of a transparent material,
The rotating ball is installed between the lower substrate and the upper substrate and has a circular shape, and the one side hemisphere portion and the other side hemisphere portion of the sphere are charged with different potentials and are colored in different colors;
The electronic paper, characterized in that it is provided in the lower portion of the rotating ball having a ferroelectric layer for rotating the rotating ball. Lower substrate,
A lower electrode formed on the lower substrate,
An upper substrate composed of a transparent material,
An upper electrode formed on the upper substrate and composed 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,
Positive and negatively charged fine particles filled in the cell space,
An electronic paper comprising a ferroelectric layer formed on the lower electrode. 5. The method of claim 4,
Electronic paper, characterized in that the upper electrode is composed of a conductive organic material or a mixture of conductive organic material and conductive inorganic material. 5. The method of claim 4,
Electronic paper, characterized in that the ferroelectric layer is composed of at least one of a ferroelectric inorganic material and a ferroelectric organic material or a mixture of organic materials. The method according to claim 4 or 6,
Electronic paper, characterized in that the ferroelectric layer is composed of a mixture of ferroelectric material and metal. The method of claim 7, wherein
Electronic paper, characterized in that the metal is iron (Fe). 5. The method of claim 4,
Electronic paper, characterized in that the upper electrode is formed in a direction orthogonal to the lower electrode. 5. The method of claim 4,
Electronic paper, characterized in that the insulating layer is further provided on the upper electrode. 5. The method of claim 4,
Electronic paper, characterized in that the ferroelectric layer is formed in the intersection region of the upper electrode and the lower electrode. 5. The method of claim 4,
The ferroelectric layer is an electronic paper, characterized in that formed on the entire lower substrate is formed on the lower electrode. 5. The method of claim 4,
Electronic paper, characterized in that the lower substrate is composed of paper. 5. The method of claim 4,
Electronic paper, characterized in that the lower substrate is composed of an organic material. 5. The method of claim 4,
The lower electrode is an electronic paper, characterized in that composed of at least one of a conductive organic material, a mixture of a conductive organic material or a compound. Lower substrate,
A lower electrode formed on the lower substrate,
An upper substrate composed of a transparent material,
An upper electrode formed on the upper substrate and composed of a transparent material;
A microcapsule installed between the lower substrate and the upper substrate, the microcapsules having positive or negatively charged microparticles therein;
An electronic paper comprising a ferroelectric layer formed on the upper electrode. 17. The method of claim 16,
Electronic paper, characterized in that the upper electrode is composed of a mixture of a conductive organic material or a conductive inorganic material. 17. The method of claim 16,
Electronic paper, characterized in that the ferroelectric layer is composed of at least one of a ferroelectric inorganic material and a ferroelectric organic material or a mixture of organic materials. 17. The method of claim 16,
Electronic paper, characterized in that the ferroelectric layer is composed of a mixture of ferroelectric material and metal. 20. The method of claim 19,
Electronic paper, characterized in that the metal is iron (Fe). 17. The method of claim 16,
Electronic paper, characterized in that the upper electrode is formed in a direction orthogonal to the lower electrode. 17. The method of claim 16,
Electronic paper, characterized in that the ferroelectric layer is formed in the intersection region of the upper electrode and the lower electrode. 17. The method of claim 16,
The ferroelectric layer is an electronic paper, characterized in that formed on the entire lower substrate is formed on the lower electrode. 17. The method of claim 16,
Electronic paper, characterized in that the lower substrate is composed of paper. 17. The method of claim 16,
Electronic paper, characterized in that the lower substrate is composed of an organic material. 17. The method of claim 16,
The lower electrode is an electronic paper, characterized in that composed of at least one of a conductive organic material, a mixture of a conductive organic material or a compound. 17. The method of claim 16,
Electronic paper, characterized in that the insulating layer is further provided on the upper electrode. Lower substrate,
A lower electrode formed on the lower substrate,
An upper substrate composed of a transparent material,
An upper electrode formed on the upper substrate,
The rotating ball is installed between the lower substrate and the upper substrate and has a circular shape, and the one side hemisphere portion and the other side hemisphere portion of the sphere are charged with different potentials and are colored in different colors;
An electronic paper comprising a ferroelectric layer formed on the lower electrode. 29. The method of claim 28,
Electronic paper, characterized in that the upper electrode is composed of a mixture of a conductive organic material or a conductive inorganic material. 29. The method of claim 28,
Electronic paper, characterized in that the ferroelectric layer is composed of at least one of a ferroelectric inorganic material and a ferroelectric organic material or a mixture of organic materials. 29. The method of claim 28,
Electronic paper, characterized in that the ferroelectric layer is composed of a mixture of ferroelectric material and metal. 32. The method of claim 31,
Electronic paper, characterized in that the metal is iron (Fe). 29. The method of claim 28,
Electronic paper, characterized in that the upper electrode is formed in a direction orthogonal to the lower electrode. 29. The method of claim 28,
Electronic paper, characterized in that the ferroelectric layer is formed in the intersection region of the upper electrode and the lower electrode. 29. The method of claim 28,
The ferroelectric layer is an electronic paper, characterized in that formed on the entire lower substrate is formed on the lower electrode. 29. The method of claim 28,
Electronic paper, characterized in that the insulating layer is further provided on the upper electrode. 29. The method of claim 28,
Electronic paper, characterized in that the lower substrate is composed of paper. 29. The method of claim 28,
Electronic paper, characterized in that the lower substrate is composed of an organic material. 29. The method of claim 28,
The lower electrode is an electronic paper, characterized in that composed of at least one of a conductive organic material, a mixture of a conductive organic material or a compound. In the method of manufacturing the electronic paper,
Preparing a lower substrate;
Forming a lower electrode on the lower substrate;
Forming a ferroelectric layer on the lower electrode;
Forming a cell space by forming a partition on the ferroelectric layer formed structure,
Filling fine particles into the cell space;
Preparing the upper substrate,
Forming an upper electrode on the upper substrate;
And coupling an upper substrate on which an upper electrode is formed above the cell space. 41. The method of claim 40,
The lower substrate is a paper manufacturing method, characterized in that the paper. 41. The method of claim 40,
And the lower substrate is an organic material. 41. The method of claim 40,
The lower electrode or the upper electrode is a conductive organic material, a mixture or a compound of a conductive organic material, characterized in that the manufacturing method of electronic paper. 44. The method of claim 43,
The lower electrode or the upper electrode is an electronic paper manufacturing method, characterized in that formed by any one of the method of inkjet, spin coating method or screen printing. 41. The method of claim 40,
Formation of the ferroelectric layer is
Forming a mixture of ferroelectric minerals and ferroelectric organics,
Forming a ferroelectric layer using the mixture characterized in that it comprises a step of forming an electronic paper. 41. The method of claim 40,
Formation of the ferroelectric layer is
Forming a mixture of ferroelectric minerals and organics,
Forming a ferroelectric layer using the mixture characterized in that it comprises a step of forming an electronic paper. 41. The method of claim 40,
Formation of the ferroelectric layer is
Mixing the ferroelectric inorganics and the metal to form a mixture,
Forming a ferroelectric layer using the mixture characterized in that it comprises a step of forming an electronic paper. 49. The method of claim 47,
Method for producing electronic paper, characterized in that the metal is iron (Fe). 41. The method of claim 40,
Forming the partition wall is
Forming a photoresist layer on the structure on which the lower electrode is formed;
Curing the photoresist layer;
And etching the portion corresponding to the cell space of the cured photoresist layer. 41. The method of claim 40,
And forming an insulating layer on the upper electrode.
KR1020110038904A 2010-05-19 2011-04-26 E-Papar ane method of manufacturing the same KR20120121121A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020110038904A KR20120121121A (en) 2011-04-26 2011-04-26 E-Papar ane method of manufacturing the same
PCT/KR2011/003721 WO2011145901A2 (en) 2010-05-19 2011-05-19 Electronic paper and manufacturing method therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110038904A KR20120121121A (en) 2011-04-26 2011-04-26 E-Papar ane method of manufacturing the same

Publications (1)

Publication Number Publication Date
KR20120121121A true KR20120121121A (en) 2012-11-05

Family

ID=47507628

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110038904A KR20120121121A (en) 2010-05-19 2011-04-26 E-Papar ane method of manufacturing the same

Country Status (1)

Country Link
KR (1) KR20120121121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015080385A1 (en) * 2013-11-28 2015-06-04 (주)엘지하우시스 Transmittance-variable film and method for producing same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015080385A1 (en) * 2013-11-28 2015-06-04 (주)엘지하우시스 Transmittance-variable film and method for producing same
US10067399B2 (en) 2013-11-28 2018-09-04 Lg Hausys, Ltd. Transmittance-variable film and method for producing same

Similar Documents

Publication Publication Date Title
KR101329628B1 (en) Circuit board and manufacturing method thereof, electro-optical device, and electronic apparatus
KR100876136B1 (en) Field Effect Transistor and Ferroelectric Memory Device Having MFC Structure and Manufacturing Method Thereof
CN101038952B (en) Circuit board, electro-optical device, and electric apparatus
CN101438382B (en) Electronic device including a guest material within a layer and a process for forming the same
CN1494743A (en) Electrochemical device
CN1879236B (en) Organic layered material with a region including a guest material and organic electronic devices incorporating the same
CN104350625B (en) Ferroelectric devices, each interconnection and its manufacturing method
WO2000036465A1 (en) Assembly of microencapsulated electronic display
Hong et al. Solid-State Dual Function Electrochemical Devices: Energy Storage and Light-Emitting Applications.
KR20160048621A (en) Apparatus for displaying photonic crystal
KR100893764B1 (en) Ferroelectric material and method of forming ferroelectric layer using the same
KR20230098600A (en) organic thin film transistor
KR100876135B1 (en) Memory device and manufacturing method thereof
KR20060116726A (en) Ferrodielectric memory device and manufacturing method thereof
WO2008126961A1 (en) Mfmis-fet, mfmis-ferroelectric memory device, and methods of manufacturing the same
KR20120121121A (en) E-Papar ane method of manufacturing the same
KR101678692B1 (en) E-Papar ane method of manufacturing the same
KR101797759B1 (en) E-Papar ane method of manufacturing the same
WO2011145901A2 (en) Electronic paper and manufacturing method therefor
KR101763434B1 (en) Solar cell and method of manufacturing the same
KR20080097977A (en) Ferroelectric memory device, fet, and methods of manufacturing the same
KR101710726B1 (en) Paper-substrate transistor and memory device, and methods of manufacturing the same
KR20130021836A (en) Ferroelectric memory device, fet, and methods of manufacturing the same
KR20130033006A (en) Electronic book and mathod of manufacturing the same
KR20080063033A (en) Fet, ferroelectric memory device, and methods of manufacturing the same

Legal Events

Date Code Title Description
A201 Request for examination
AMND Amendment
AMND Amendment
E601 Decision to refuse application
AMND Amendment