WO2003001289A1 - Dispositif d'affichage et son procede de fabrication - Google Patents
Dispositif d'affichage et son procede de fabrication Download PDFInfo
- Publication number
- WO2003001289A1 WO2003001289A1 PCT/JP2002/005699 JP0205699W WO03001289A1 WO 2003001289 A1 WO2003001289 A1 WO 2003001289A1 JP 0205699 W JP0205699 W JP 0205699W WO 03001289 A1 WO03001289 A1 WO 03001289A1
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- WIPO (PCT)
- Prior art keywords
- polymer electrolyte
- electrode
- display element
- polymer
- group
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000004040 coloring Methods 0.000 claims abstract description 54
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- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 5
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- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 3
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- OTKCEEWUXHVZQI-UHFFFAOYSA-N 1,2-diphenylethanone Chemical group C=1C=CC=CC=1C(=O)CC1=CC=CC=C1 OTKCEEWUXHVZQI-UHFFFAOYSA-N 0.000 description 2
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- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical group C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
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- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 2
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- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical group C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
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- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000005207 tetraalkylammonium group Chemical group 0.000 description 1
- 150000005621 tetraalkylammonium salts Chemical class 0.000 description 1
- DZLFLBLQUQXARW-UHFFFAOYSA-N tetrabutylammonium Chemical compound CCCC[N+](CCCC)(CCCC)CCCC DZLFLBLQUQXARW-UHFFFAOYSA-N 0.000 description 1
- KBLZDCFTQSIIOH-UHFFFAOYSA-M tetrabutylazanium;perchlorate Chemical compound [O-]Cl(=O)(=O)=O.CCCC[N+](CCCC)(CCCC)CCCC KBLZDCFTQSIIOH-UHFFFAOYSA-M 0.000 description 1
- WGHUNMFFLAMBJD-UHFFFAOYSA-M tetraethylazanium;perchlorate Chemical compound [O-]Cl(=O)(=O)=O.CC[N+](CC)(CC)CC WGHUNMFFLAMBJD-UHFFFAOYSA-M 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229960000834 vinyl ether Drugs 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- G02F1/15—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 an electrochromic effect
- G02F1/1506—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 an electrochromic effect caused by electrodeposition, e.g. electrolytic deposition of an inorganic material on or close to an electrode
- G02F1/1508—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 an electrochromic effect caused by electrodeposition, e.g. electrolytic deposition of an inorganic material on or close to an electrode using a solid electrolyte
-
- 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
- G02F1/15—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 an electrochromic effect
- G02F2001/164—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 an electrochromic effect the electrolyte is made of polymers
Definitions
- the present invention relates to a display element using a material that precipitates, dissolves or discolors by, for example, electrochemical reduction or oxidation as a display material, and a method for manufacturing the same.
- the information has been read from a cathode ray tube (CRT) or a liquid crystal display of a computer.
- CTR cathode ray tube
- liquid crystal display of a computer.
- light-emitting displays are extremely fatigued for ergonomic reasons and cannot withstand long hours of reading.
- Another drawback is that the place to read is limited to the vicinity of the location where the computer is installed.
- An electrochromic display which develops a color based on an electrochemical action, is superior to the above-mentioned electrophoresis system in terms of high contrast, and has already been used for a dimming glass or watch. It has been put to practical use in displays for personal computers. However, in the case of dimming glass and timepiece displays, there is no need to drive the matrix in the first place, so they cannot be applied to display applications that repeat display or non-display, such as electronic vapor. In addition to poor quality, lack of flexibility and low reflectivity.
- the inventors of the present invention focused on a device of a system for forming a color using deposition and dissolution of metal ions (electrolyte).
- this device uses a solution of metal ions, it has problems such as liquid leakage and uneven thickness. It is difficult to manufacture and use electronic paper or paper-like displays. It had the following.
- the present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to provide a high-quality display element having good workability and a method of manufacturing the same. Disclosure of the invention
- a coloring substance that precipitates, dissolves, or discolors by electrochemical reduction or oxidation, and a polymer electrolyte are disposed between the first electrode and the second electrode, and are in an uncrosslinked state.
- the polymer (which includes a linear polymer, a linear polymer having a relatively low molecular weight, for example, a weight-average molecular weight of 400,000, and a oligomer. The same applies to the following.)
- the present invention relates to a display element in which the polymer electrolyte is formed by crosslinking polymerization or polymerization between a first electrode and a second electrode.
- the present invention also provides a method for manufacturing a display element in which a coloring substance that precipitates, dissolves or discolors by electrochemical reduction or oxidation, and a polymer electrolyte are disposed between the first electrode and the second electrode.
- a coloring substance that precipitates, dissolves or discolors by electrochemical reduction or oxidation and a polymer electrolyte are disposed between the first electrode and the second electrode.
- the starting material is disposed between the first electrode and the second electrode together with the coloring substance, and in this state, the polymer is cross-linked and polymerized or polymerized to form the polymer electrolyte. It is related.
- the starting material is crosslinked or polymerized. Since the starting material has a low viscosity before or before cross-linking polymerization, its shape can be adjusted arbitrarily by using this starting material. Thus, even a thin and flexible polymer electrolyte layer can be easily formed with good reproducibility.
- the starting material has a low viscosity, various substances to be mixed with the starting material are easily dispersed uniformly.
- a uniform cross-linked polymer three-dimensional cross-linked polymer electrolyte
- the coloring substance is selectively colored and decolored by electrochemical reduction and oxidation of the coloring substance between the first electrode and the second electrode, and the polymer electrolyte promotes this and acts to carry ions. Coloring and decoloring are quick and The contrast and the coloring density (for example, black density) are increased, and no problem such as fading occurs even when used for a long time.
- a polymer that has already been cross-linked and polymerized is applied to an electrode, dried and dried. It is conceivable to form a layer, but in this case, it is difficult to cope with various shapes due to the use of a polymer that has been previously bridged and bridge-polymerized.For example, it is difficult to reduce the thickness of the polymer electrolyte layer.
- the concentration of the polymer electrolyte may be non-uniform due to aggregation of the polymer, or a problem such as a deposition phenomenon, a change in concentration, or deterioration may easily occur.
- FIGS. 1A to 1C are cross-sectional views showing the steps of a method for manufacturing a display element according to the embodiment of the present invention.
- 2A to 2B are cross-sectional views showing the steps of a method for manufacturing a display element in the same manner.
- FIG. 3 is a partial cross-sectional perspective view of the display device.
- FIG. 4 is a sectional view of the display device.
- FIG. 5 is an equivalent circuit diagram of the display device according to the embodiment of the present invention.
- FIG. 6 is a partial plan view of the same display element on the transparent pixel electrode side.
- FIG. 7 is a perspective view of the same polymer electrolyte layer containing a spacer.
- FIG. 8A is a perspective view of the same spacer
- FIG. 8B is a perspective view of the same polymer electrolyte layer containing the spacer.
- FIG. 9 is a graph showing a time change of the optical density value of the display cell according to the embodiment of the present invention.
- FIG. 10 is a graph showing a time change of an optical density value of a display cell according to another embodiment of the present invention.
- the polymer electrolyte and the coloring substance are mixed with each other in order to promote the electrolyte function (ion propagation action) and promote the coloring function (electron supply action during ion reduction). It is preferable to form a polymer electrolyte composed of these mixtures.
- the coloring substance is made of bismuth, copper, silver, It is preferable that the electrolyte be an electrolyte containing at least one electrodepositable ion selected from the group consisting of lithium, iron, chromium, nickel and cadmium.
- the starting material is cross-linked or polymerized by at least one polymerization method selected from the group consisting of thermal polymerization, photopolymerization and radiation polymerization. Is preferred.
- thermal polymerization initiator such as a peroxide and an azobis compound in the thermal polymerization.
- a photopolymerization initiator for the photopolymerization.
- at least one photopolymerization initiator selected from the group consisting of a derivative having a benzoin group, an anthraquinone group or a phenylacetophenone group, benzophenone, thiophenol and the like may be used.
- the starting material to be the polymer electrolyte has a skeletal unit of each of [[(CH 2 ) m O] n- , one [(CH 2 ) B N] n —, or one [(CH 2 ) m S] n — represented by a polyalkylene oxide such as polyethylene oxide, a polyalkyleneimine such as polyethyleneimine, polyethylene Polyalkylene sulfides such as sulfides, or polymer materials branched with these as the main chain structure, polyacrylate, polymethyl methacrylate, polyvinylidene fluoride, polyacrylonitrile, polyacrylonitrile, polyvinyl alcohol And at least one selected from the group consisting of these and mixtures thereof. These may be liquid or powder.
- plasticizers include, for example, water, ethyl alcohol, isopropyl alcohol and mixtures thereof when the polymer is hydrophilic, and ethylene carbonate, propylene glycol, butylene carbonate when the polymer is hydrophilic.
- Dimethylcapone Dimethylcapone, getylcapone, ethylmethylcarbonate, ⁇ butyrolactone, acetonitrile, propionitrile, sulfolane, dimethoxyethane, dietoxetane, tetrahydrofuran, methyl acetate, ethyl acetate, ethyl propionate, formamide Dimethylformamide, dimethylformamide, dimethylsulfoxide, dimethylacetamide, n-methylpyrrolidone, etc. (especially aprotic solvents), and mixtures thereof. At least one selected Ri and the like.
- the polymer electrolyte contains at least one whitening auxiliary material selected from the group consisting of white particles, white cloth, and white paper.
- white particles for coloring at least one selected from the group consisting of titanium dioxide, calcium carbonate, silicon dioxide (silica), magnesium oxide, aluminum oxide and the like can be used.
- a dye for coloring can also be used.
- the display element 18 shown in FIGS. 3 and 4 is a transparent pixel electrode which is a first transparent electrode controlled by a thin film transistor (TFT) 3 which is a driving element. 2 (first electrode), a polymer electrolyte layer 5 containing metal ions (electrolyte as a coloring substance), a polymer electrolyte and a whitening agent, and a second electrode opposed to the first transparent pixel electrode
- TFT thin film transistor
- a plurality of display pixels 17 each including a common electrode 6 (second electrode) provided in common for each pixel are configured as a planar display.
- the display element 18 forms one pixel by a combination of a transparent pixel electrode 2 and a thin film transistor (TFT) 3, and these pixels are arranged on the transparent support 1 in, for example, a dot (or matrix) shape.
- TFT thin film transistor
- the material of the transparent support 1 it is possible to use a transparent glass substrate such as a quartz glass plate or a white plate glass plate, but it is not limited thereto, and esters such as polyethylene naphthalate and polyethylene terephthalate; Polyamides, polycarbonates, cellulose esters such as cellulose acetate, fluorine-containing polymers such as polyvinylidene fluoride, polytetrafluoroethylene, hexafluoropropylene, polyethers such as polyoxymethylene, polyacetals, Examples include polyolefins such as polystyrene, polyethylene, polypropylene, and methylpentene polymer, and polyimides such as polyimidamide / polyetherimide.
- esters such as polyethylene naphthalate and polyethylene terephthalate
- the transparent pixel electrode 2 is made of a transparent conductive film formed in a substantially rectangular or square pattern, and as shown in FIG. 3, the pixels 17 are separated from each other.
- a thin film transistor (hereinafter abbreviated as TFT) 3 is provided for each 17.
- I n 2 ⁇ 3 and S ITO N_ ⁇ a mixture of 2, S N_ ⁇ 2, I n 2 0 3, M g O , or sputtering Ya vacuum deposited Z n O, etc. It is preferable to use a film formed by a method or the like. These films may be doped with Sn or Sb.
- the TFT 3 formed for each pixel 17 is selected by a wiring (not shown), and controls the driving of the corresponding transparent pixel electrode 2.
- TFT 3 is extremely effective in preventing crosstalk between the pixels 17.
- the TFT 3 is formed, for example, so as to occupy one corner of the transparent pixel electrode 2, but may have a structure in which the transparent pixel electrode 2 overlaps the TFT 3.
- a gate line 15 and a data line 14 are connected to the TFT 3
- a gate electrode of each TFT 3 is connected to each gate line 15.
- the source and the drain of each TFT 3 are connected to each data line 14, and the other of the source and the drain is electrically connected to the transparent pixel electrode 2.
- the polymer electrolyte layer 5 contains a metal ion (electrolyte) as a coloring substance, which is used for discoloration.
- the metal ion (electrolyte) derived from a metal halide such as silver halide used for this discoloration is discolored or electrochemically deposited, and is electrolyzed (coloring) A, and the reverse reaction, elution (dissipation). ) are reversibly generated, whereby the display is performed.
- This coloring pattern A is made of, for example, precipitated silver, and can be visually recognized as a display color from the side of the transparent support 1 (see FIG. 4).
- the material of the metal ion (electrolyte) capable of developing and decoloring by such electrochemical deposition and elution is not particularly limited, but includes bismuth, copper, silver, Examples include ions of each metal such as lithium, iron, chromium, nickel, force dome, and the like, and ions of a metal composed of a combination thereof. Particularly preferred metal ions are bismuth ions and silver ions.
- bismuth or silver is preferable is that, for example, a reversible reaction (a reaction in which color development and decoloration are repeated) can easily proceed, and the degree of discoloration at the time of deposition is high.
- the polymer electrolyte layer 5 will be described later in detail.
- a common electrode 6 is formed as a second electrode.
- the common electrode 6 may be made of any metal that is electrochemically stable, but is preferably formed of platinum, chromium, aluminum, cobalt, palladium, or the like.
- the film can be formed by a method or a vacuum evaporation method.
- carbon can be used for the common electrode if the metal used for the main reaction can be sufficiently supplemented beforehand or at any time. Carbon for this purpose may be carried on, for example, a metal electrode.
- a method for this for example, there is a method of printing on a substrate surface a carbon paint that has been inked by using a resin. The cost of the common electrode 6 can be reduced.
- the material of the support 7 is not necessarily required to be transparent, and a substrate, a film, or the like that can securely hold the common electrode 6 and the polymer electrolyte layer 5 can be used.
- a glass substrate such as a quartz glass plate or a white plate glass plate, a ceramic substrate, a paper substrate, a wood substrate, or the like, but is not limited thereto, and a synthetic resin substrate can be used.
- Esters such as ethylene oxide, polyethylene terephthalate, etc., polyamides.
- Polyesters such as cellulose acetate, fluorine-containing polymers such as polyvinylidene fluoride, polytetrafluoroethylene, hexafluoropropylene, poly And polyolefins such as polystyrene, polyethylene, polypropylene, and methylpentene polymer, and polyimides such as polyimidamide / polyetherimide.
- fluorine-containing polymers such as polyvinylidene fluoride, polytetrafluoroethylene, hexafluoropropylene, poly And polyolefins such as polystyrene, polyethylene, polypropylene, and methylpentene polymer
- polyimides such as polyimidamide / polyetherimide.
- these synthetic resins When used as the support 7, they can be made into a rigid substrate shape that does not easily bend, but they can also be made into a flexible film-like structure. It is.
- the support 7 need not be provided.
- a sealing resin portion 10 holding both supports 1 and 7 is formed around the transparent pixel electrode 2 and the common electrode 6 so as to face each other.
- the sealing resin portion 10 securely holds both the supports 1 and 7, the transparent pixel electrode 2 ⁇ TFT 3, the polymer electrolyte layer 5, and the common electrode 6 disposed therebetween. Will be.
- active matrix driving can be performed using the TFT 3, and deposition and dissolution of metal ions (electrolyte) contained in the polymer electrolyte layer 5 are performed. Thereby, the contrast and the coloring density can be increased.
- a monomer constituting the polymer electrolyte layer 5 or an uncrosslinked polymer is placed between the transparent pixel electrode 2 and the common electrode 6 which face each other while maintaining a predetermined gap.
- a mixed solution of a starting material composed of coalescing and a coloring material (metal ions derived from a metal halide such as silver halide) is injected and placed, the starting material is cross-linked by heating or light irradiation.
- the polymer electrolyte layer 5 is formed by combining or polymerizing.
- the starting material is used as a low-viscosity solution and injected between the electrodes, it can be adjusted to a thin shape (or any shape), and thus a thin film and flexible polymer Even the electrolyte layer 5 can be easily formed with good reproducibility.
- the starting material solution has a low viscosity, various substances to be mixed with the starting material are easily dispersed uniformly, so that a uniform polymer (polymer electrolyte) can be formed in a uniform thickness.
- the coloring substance is selectively colored and decolored by electrochemical reduction and oxidation of the coloring substance between the transparent pixel electrode 2 and the common electrode 6, and this is supplied by ion supply by the ion propagation action of the polymer electrolyte. Since it can be accelerated, the contrast and coloring density are increased, and problems such as fading do not occur even when used for a long time.
- a transparent pixel electrode 2 made of an ITO film and a TFT 3 are formed for each pixel 17 on a transparent support 1 such as a glass substrate.
- the transparent pixel electrode (ITO film) 2 is formed by physical film formation such as vapor deposition and sputtering and photo etching. These transparent pixel electrodes 2 and TFT 3 are formed for each pixel 17, and each pixel 17 is arranged on the transparent support 1 in a dot shape (or a matrix shape).
- a solution 5A of a starting material such as a monomer constituting the polymer electrolyte layer 5 is applied to a predetermined thickness on the transparent support 1 and polymerized by a method described later.
- the polymer electrolyte layer 5 is formed.
- a common electrode 6 made of a palladium film having a required thickness is formed on a support 7 made of a polyethylene terephthalate film or the like by a physical film forming method such as sputtering.
- the support 7 was placed on the support 1 so that the common electrode 6 was in contact with the solution 5A, and the solution 5A was held between the two supports 7-1.
- the state is as shown in FIG. 2A.
- the substance in the solution 5A is cross-linked or polymerized by a treatment such as heating described below in the state of FIG. 2A, and the polymer electrolyte layer 5 is supported. It is formed between 7 and the transparent support 1.
- This method is mainly divided into three types of polymerization methods: thermal polymerization type, photopolymerization type and radiation polymerization type.
- FIGS. 3 and 4 show the structure of a display element having a thermopolymerization type polymer electrolyte layer. The same applies to each of the photopolymerization and radiation polymerization types described below.
- a monomer molecule or a low-molecular-weight linear polymer serving as a basic skeleton of a polymer electrolyte is dissolved in a suitable nonaqueous solvent (such as an organic solvent) in advance.
- a suitable nonaqueous solvent such as an organic solvent
- the applicable organic solvent is not particularly limited, and may be, for example, a known general-purpose battery solvent.
- Such general-purpose battery solvents include, for example, ethylene carbonate, propylene carbonate, butylene carbonate, dimethyl carbonate, getylcapone, ethylmethyl carbonate, methyl acetate, acetic acid Ethyl, propethylate, dimethylsulfoxide, polybutyrolactone, dimethyloxetane, jetoxetane, tetrahydrofuran, formamide, dimethylformamide, getylformamide, dimethylacetamide, acetonitrile, propionitrile, methylpyrrolidone, etc.
- a water solvent is suitable.
- a display element manufacturing environment for example, when a display element is manufactured using a highly volatile material (specifically, at the time of polymerization of a starting material or after polymerization), The solvent can be removed by reducing the pressure or heating.
- a display element may be manufactured by leaving a part of the solvent therein.
- the skeletal unit is — [(CH 2 ) ⁇ ⁇ one] ⁇ ⁇ , one [(CH 2 ) ra N] n ⁇ or Represented by [(CH 2 ) m S-] n —, a polyalkylene oxide such as polyethylene oxide, a polyalkylene imide such as polyethylene imine, a polyalkylene sulfide such as polyethylene sulfide, or At least one selected from the group consisting of a polymer material branched from these as a main chain structure, polyacrylate, polymethyl methacrylate, polyvinylidene fluoride, polycarbonate, polyacrylonitrile, polypinyl alcohol, and a mixture thereof Seeds can be used.
- a coloring substance (electrolyte) is dissolved in the above solvent.
- the coloring substance include silver nitrate, silver borofluoride, silver halide (eg, Ag1) silver perchlorate, silver cyanide, and thiocyanide.
- quaternary ammonium halides halogens are F, Cl, Br, I, etc.
- alkali metal halides LiCl, LiB
- a supporting electrolyte composed of at least one selected from alkali metal cyanide salts and alkali metal thiocyanate salts (all of which are Na, Li, K, etc.) is preferred.
- plasticizers include, for example, water, ethyl alcohol, isopropyl alcohol and mixtures thereof when the polymer is hydrophilic, and ethylene carbonate, propylene carbonate, and the like when the polymer is hydrophobic.
- a coloring agent is added to the polymer electrolyte layer 5 in order to improve contrast.
- a white material having a high concealing property is added as the background.
- white cloth, white paper, white particles for coloring and the like are used.
- white particles for coloring include titanium dioxide, calcium carbonate, silicon dioxide (silica), magnesium oxide, aluminum oxide and the like. At least one selected from the group can be used. Further, a color element for coloring can also be used.
- the mixing ratio of the coloring agent is preferably about 1 to 50% by weight (wt)%, more preferably about 1 to 101%, and more preferably about 5 to 100%. 1 O wt%.
- Inorganic white particles such as titanium dioxide do not dissolve in polymer materials and only disperse.Therefore, if the mixing ratio increases, the inorganic particles aggregate and the optical density becomes uneven. It is because. In addition, since the inorganic particles do not have ionic conductivity, an increase in the mixing ratio causes a decrease in the conductivity of the polymer electrolyte. Therefore, considering both, the upper limit of the mixing ratio is preferably set at about 20 wt%.
- the mixing amount may be 10 wt%. This is because the coloring efficiency of the dye is much higher than that of the inorganic particles. Therefore, if the dye is electrochemically stable, contrast can be obtained even in a small amount.
- oil-soluble dyes are preferred as pigments.
- the thickness of the polymer electrolyte layer 5 is preferably from 20 / m to 200 m, and more preferably 50 n! M. To 150 m, and more preferably 70 m to 150 m.
- the mechanical strength decreases If it is too thin, the whiteness (contrast) becomes insufficient because the amount of white particles mixed is small.
- a solution prepared by dissolving a coloring substance (metal ions such as a silver salt), a supporting electrolyte, and a starting material (a raw material for a polymer electrolyte layer) composed of a polymer or monomer in an uncrosslinked state in the above-described solvent Further, a thermal polymerization initiator is added.
- a thermal polymerization initiator an azobis compound such as benzobisisobutyronitrile peroxide such as benzoyl peroxide is used, but other known materials may be used.
- One of these thermal polymerization initiators may be used alone, or a plurality of them may be used in combination.
- the above solution 5 A (starting material (raw material), metal ion, supporting electrolyte, polymerization initiator, , And a coloring agent) are coated on the transparent support 1 by a wet film forming method selected from, for example, a casting method, a coating method, and a printing method.
- the solution 5A applied on the transparent support 1 maintains a flat and desired thickness due to surface tension, so that the polymer electrolyte layer 5 formed after polymerization always has a set thickness.
- a support 7 is put on the solution 5A, and the electrodes 6 and 2 are connected between the support 7 and the transparent support 1. And sandwich the polymer electrolyte solution 5A. .
- a rod-shaped reinforcing material 9a having an arbitrary particle size or length is mixed in advance in the solution 5A to maintain the strength of the element (or supported). Place it on the body 1) and use it as a spacer.
- a gap is secured between the electrodes by sandwiching a spacer 9b made of non-woven fabric or paper, and as shown in FIG. By impregnating the solution with a 9b spacer made of non-woven fabric or paper, it is possible to secure an optimal distance between the electrodes.
- the starting material in the solution is heated for several minutes to 5 hours at an optimal polymerization temperature of room temperature to 200 ° C. Polymerization is performed, whereby the solution is gelled to form a polymer electrolyte layer 5 containing the above-mentioned various substances, thereby producing a display element.
- the above-mentioned linear polymer compounds as starting materials are chemically bonded to each other.
- Crosslinking polymerization A crosslinking agent is preferably used in order to obtain a polymer compound having a three-dimensional network structure.
- the cross-linking reaction is caused by previously mixing with the starting material or that the cross-linking reaction is caused simultaneously with the linear polymerization reaction.
- Such crosslinking agents include divinylbenzene, 1,5-hexadiene-3-yne, hexatriene, divinylether, divinylsulfone, and other divinyl compounds, aryl phthalate, 2,6-diacrylphenol, diaryl carbyl. And diaryl compounds such as knol.
- the cross-linking agent may be a cross-linking by an ionic mechanism, a condensation reaction or an addition reaction.
- Aldehydes, dialdehydes, urea derivatives, glycols, dicarboxylic acids, mono- and diamines are used for the condensation reaction, and diisocyanates, bisepoxy compounds, bisethyleneimine compounds, etc. for the addition reaction Is used.
- the display element having the thermopolymerized polymer electrolyte layer 5 of the present example is a linear polymer or a polymer composed of a polymer electrolyte such as polyethylene oxide between the transparent pixel electrode 2 and the common electrode 6.
- a solution 5 A containing a monomer and a coloring substance such as Ag I, the linear polymer and the like are crosslinked and thermally polymerized to form the polymer electrolyte layer 5, so that the viscosity is low before polymerization.
- the shape can be adjusted arbitrarily, and it can be easily formed with good reproducibility even with a thin polymer electrolyte layer.
- the starting material has a low viscosity, various substances mixed with the starting material are easily dispersed uniformly, so that a uniform polymer (polymer electrolyte) can be formed with a uniform thickness.
- an electric field applied between the first electrode and the second electrode selectively causes coloring between the two electrodes by electrochemical reduction of a coloring substance (silver salt) (precipitation of silver).
- a coloring substance silver salt
- the desired display pattern can be obtained by decoloring due to oxidization (dissolution of silver).
- the polyelectrolyte promotes this oxidation and reduction, and coloring and decoloring are carried out quickly and sufficiently by the action of transporting ions, increasing the contrast and coloring concentration, and causing problems such as fading even after prolonged use. Does not occur.
- the display element according to the present example is effective for producing a display medium very similar to paper, such as a paper-like display (electronic paper). That is, since the polymer electrolyte raw material solution 5A is rich in fluidity and the like, the formability is improved even in a thin shape, and the polymer electrolyte layer 5 is formed as a thin, flexible and durable thin layer. Thus, a thin display medium such as a high-quality flexible flexible display can be manufactured.
- the precipitated coloring substance A remains for a certain period of time as shown in FIG. 4 (that is, because it has memory uniformity). It can be used as a recording medium instead of printed matter as electronic paper, and has good contrast and is easy to see.
- a photopolymerization method is used as a method for polymerizing the above-mentioned starting materials.
- the optimum ultraviolet (UV) light output 5 to 2 0 0 m W, the irradiation dose and ⁇ 5 0 0 0 J _ cm 2, about several minutes to 3 0 min, UV raw material dissolved solution Irradiation is carried out in the same manner as in the above-mentioned example except that photopolymerization is performed.
- UV raw material dissolved solution Irradiation is carried out in the same manner as in the above-mentioned example except that photopolymerization is performed.
- the use of ultraviolet rays that act as radiation results in radiation polymerization.
- At least one photopolymerization initiator selected from the group consisting of a derivative having a benzoin group, an anthraquinone group or a phenylacetophenone group, benzophenone, thiophenol and the like is used.
- a starting material composed of a polymer electrolyte such as polyethylene oxide and a solution containing a coloring material such as AgI are arranged between the transparent pixel electrode 2 and the common electrode 6, the starting material Is photopolymerized to form the polymer electrolyte layer 5, so that a thin polymer electrolyte layer can be easily formed with good reproducibility and a uniform polymer (polymer electrolyte) can be formed as described above. It can also be formed to a uniform thickness.
- a potential detection electrode 8 independent of the transparent pixel electrode 2 and the common electrode 6 (second electrode) is provided as a third electrode. May be formed.
- This potential detecting electrode 8 is provided on the transparent support 1 in the same plane as the transparent pixel electrode 2 or the common electrode 6. It is disposed as an insulated member and is used to detect the potential of the transparent pixel electrode 2 or the common electrode 6 on the transparent support 1.
- a transparent pixel electrode 2 and a TFT 3 as a driving element are formed on a transparent support 1 for each pixel 17, and a potential detection electrode 8 is provided in a space between the pixels 17.
- a cross-shaped pattern is formed, and the end 19 (shown by a black circle in the figure) is a silver electrode or an aluminum electrode having a thickness of about 100 nm, for example.
- the ends 19-19 are connected by a wiring portion of a silver wire or an aluminum wire having a width of, for example, about 1 Zm.
- the potential detecting electrode 8 is formed as an electrically insulated member in the same plane as the transparent pixel electrode 2, the potential of the transparent pixel electrode 2 can be accurately monitored, and The reaction occurring at the transparent pixel electrode 2 can be detected.
- the material of the potential detection electrode 8 it is preferable to select a stable metal material that does not participate in the reaction at all and does not spontaneously elute into the medium.
- a stable metal material that does not participate in the reaction at all and does not spontaneously elute into the medium.
- platinum and chromium similar to the second electrode 6 are used.
- Aluminum, cobalt, palladium, silver, etc. can be selected.
- FIG. 5 is an equivalent circuit diagram of a display device 20 including the display element 18 provided with the potential detection electrode 8.
- pixels 17 each including a thin film transistor (TFT) 3, a transparent pixel electrode 2, and a common electrode 6 are arranged in a matrix, and a data line driving circuit 12a for selecting each pixel 17 is provided.
- TFT thin film transistor
- 1 2 t> and a gate line driving IK path 13 are provided, and a predetermined data line 14 and a gate line 15 are respectively controlled by a signal control unit 16.
- a potential detection electrode 8 is connected to the signal control unit 16 so that the pixel potential detected by the potential detection electrode 8 can be monitored.
- This potential detection In the monitoring by the electrode 8, for example, when a sufficient deposition or electrochemical reaction has occurred, the further reaction (that is, voltage application between the electrodes) can be stopped by the control signal of the control unit 16.
- the display electrode transparent pixel electrode
- an ITO film 2 and a thin film transistor (TF ⁇ ) 3 are arranged in a plane at a pitch of 150 m on a glass substrate 1 having a thickness of 1.5 mm and a size of 10 cm ⁇ 10 cm.
- TF ⁇ thin film transistor
- the solution was stirred under heating, and the solution started to aggregate at a temperature of 20 by this heating and stirring, and a stringing state occurred at 40, and furthermore, Even at 60 ° C, the stringing state continued, and at 80, the tendency of thickening was observed.
- the thickening tendency of the solution was confirmed by a cone-and-plate type rotary viscometer (manufactured by Toki Sangyo Co., Ltd.). It was found to thicken to S.
- the rotation conditions of the cone-to-plate rotary viscometer were such that the tip cone angle ( ⁇ ) was The mixture was stirred at 60 ° C. for 5 seconds at 1 ° 3 4 ′, with a radius (R) of 24 mm.
- the tendency to thicken was interpreted as thermal polymerization, and a silver ion-containing polyethylene oxide film capable of electrodeposition was obtained by this thermal polymerization.
- the thickness of a common electrode formed by forming a 300- ⁇ -thick palladium film as a common electrode by sputtering is 0.
- the solution is sandwiched by placing a support 7 made of polyethylene terephthalate film of 5 mm and measuring 10 cm XI 0 cm, and the solution is sandwiched.In this state, the solution is treated at 80 ° C or more for several minutes or more, Polyethylene oxide was subjected to heat crosslinking polymerization.
- the constant current drive of 1 OmAZcm 2 is shown , and the optical density value of the cell reflected light (that is, the amount of deposited metal ions) with respect to the time on the horizontal axis is expressed on a log scale.
- the optical density value is — log (II.). (I: transmitted light density, I: incident light intensity)
- the transmittance is 10% and the reflectance is 90%
- the transmittance is 100% and the reflectance is 100%.
- ethoxyphenylphenylacetophenone which is a photosensitizer as a photopolymerization initiator was added to the raw material solution of the polymer electrolyte used in Example 1. 1% by weight was added, and photopolymerization was used as a monomer polymerization method. That is, the procedure was the same as in Example 1 except that photopolymerization was carried out by irradiating ultraviolet rays for 30 seconds with a low-pressure mercury lamp (output: 8 mW).
- the shape of the electrode is not limited to the dot shape as in the above embodiments and examples, but may be, for example, a striped electrode.
- the present invention disposes a starting material composed of an uncrosslinked polymer or monomer of a polymer electrolyte and a coloring material between a first electrode and a second electrode, and then converts the starting material. Since the polymer electrolyte layer is formed by cross-linking polymerization or polymerization, its shape can be arbitrarily adjusted by using a low-viscosity starting material before cross-linking polymerization or before polymerization, and it is thin and flexible. It can be easily formed with good reproducibility even with a polymer electrolyte layer having a property.
- the starting material has a low viscosity
- various substances to be mixed with the starting material are easily dispersed uniformly, so that a uniform polymer (polymer electrolyte) can be formed to a uniform thickness.
- the coloring substance is selectively colored and decolored by electrochemical reduction and oxidation of the coloring substance between the first electrode and the second electrode, and the polymer electrolyte promotes this, so that the contrast and the coloring concentration are increased.
- problems such as fading do not occur.
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-7016840A KR20040011553A (ko) | 2001-06-26 | 2002-06-07 | 표시소자 및 그 제조방법 |
EP02736031A EP1424590B1 (en) | 2001-06-26 | 2002-06-07 | Method of manufacturing a display device |
US10/482,265 US7072091B2 (en) | 2001-06-26 | 2002-06-07 | Display element and production thereof |
DE60239472T DE60239472D1 (de) | 2001-06-26 | 2002-06-07 | Verfahren zur herstellung einer anzeigeeinrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-192204 | 2001-06-26 | ||
JP2001192204A JP3804822B2 (ja) | 2001-06-26 | 2001-06-26 | 表示素子及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
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WO2003001289A1 true WO2003001289A1 (fr) | 2003-01-03 |
Family
ID=19030692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/005699 WO2003001289A1 (fr) | 2001-06-26 | 2002-06-07 | Dispositif d'affichage et son procede de fabrication |
Country Status (7)
Country | Link |
---|---|
US (1) | US7072091B2 (ja) |
EP (1) | EP1424590B1 (ja) |
JP (1) | JP3804822B2 (ja) |
KR (1) | KR20040011553A (ja) |
CN (1) | CN1239953C (ja) |
DE (1) | DE60239472D1 (ja) |
WO (1) | WO2003001289A1 (ja) |
Cited By (2)
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CN102417310A (zh) * | 2011-08-23 | 2012-04-18 | 陕西科技大学 | 无机基电致变色复合膜的制备方法 |
CN102417607A (zh) * | 2011-08-23 | 2012-04-18 | 陕西科技大学 | 有机基电致变色复合膜的制备方法 |
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JP3669363B2 (ja) | 2003-03-06 | 2005-07-06 | ソニー株式会社 | エレクトロデポジション型表示パネルの製造方法、並びにエレクトロデポジション型表示パネルおよびエレクトロデポジション型表示装置 |
JP4508544B2 (ja) * | 2003-04-07 | 2010-07-21 | ソニー株式会社 | 電気化学表示装置 |
JP2004309946A (ja) * | 2003-04-10 | 2004-11-04 | Sony Corp | 電気化学表示装置及びその製造方法 |
JP2004327167A (ja) * | 2003-04-23 | 2004-11-18 | Sony Corp | 電解液の注入方法、湿式光電変換素子の製造方法および湿式装置の製造方法 |
JP4527364B2 (ja) * | 2003-05-08 | 2010-08-18 | 富士通株式会社 | シート型表示装置 |
JP4534436B2 (ja) * | 2003-06-27 | 2010-09-01 | ソニー株式会社 | 表示素子、表示装置及びこれらの製造方法 |
JP2005189384A (ja) * | 2003-12-25 | 2005-07-14 | Sony Corp | 電気化学調光装置及びその駆動方法 |
JP4506171B2 (ja) * | 2003-12-25 | 2010-07-21 | ソニー株式会社 | 電気化学調光装置及びその製造方法 |
WO2006129429A1 (ja) | 2005-06-02 | 2006-12-07 | Konica Minolta Holdings, Inc. | 表示素子 |
JP2006350110A (ja) * | 2005-06-17 | 2006-12-28 | Mitsubishi Pencil Co Ltd | 画像表示媒体 |
WO2007017472A1 (de) | 2005-08-08 | 2007-02-15 | Siemens Aktiengesellschaft | Verfahren zur herstellung eines elektrochromen displays |
US8107116B2 (en) | 2006-05-18 | 2012-01-31 | Konica Minolta Business Technologies, Inc. | Image forming apparatus |
ITMI20070301A1 (it) * | 2007-02-16 | 2008-08-17 | Getters Spa | Supporti comprendenti materiali getter e sorgenti di metalli alcalini o alcalino-terrosi per sistemi di termoregolazione basati su effetto tunnel |
JP5104860B2 (ja) | 2007-06-08 | 2012-12-19 | コニカミノルタホールディングス株式会社 | 電気化学表示素子の製造方法及び電気化学表示素子 |
JP5742440B2 (ja) * | 2010-05-13 | 2015-07-01 | 株式会社リコー | エレクトロクロミック表示素子 |
US9858520B2 (en) * | 2015-09-21 | 2018-01-02 | Microsoft Technology Licensing, Llc | Controllable marking |
CN107203052A (zh) * | 2017-05-05 | 2017-09-26 | 柯剑 | 电沉积显示组件及其制备方法 |
KR102467612B1 (ko) * | 2017-12-27 | 2022-11-15 | 엘지디스플레이 주식회사 | 프라이버시 보호 필름 및 이를 포함하는 표시 장치 |
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- 2002-06-07 KR KR10-2003-7016840A patent/KR20040011553A/ko not_active Ceased
- 2002-06-07 CN CNB02812877XA patent/CN1239953C/zh not_active Expired - Fee Related
- 2002-06-07 DE DE60239472T patent/DE60239472D1/de not_active Expired - Lifetime
- 2002-06-07 US US10/482,265 patent/US7072091B2/en not_active Expired - Fee Related
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CN102417310A (zh) * | 2011-08-23 | 2012-04-18 | 陕西科技大学 | 无机基电致变色复合膜的制备方法 |
CN102417607A (zh) * | 2011-08-23 | 2012-04-18 | 陕西科技大学 | 有机基电致变色复合膜的制备方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1424590A1 (en) | 2004-06-02 |
EP1424590A4 (en) | 2005-09-14 |
JP2003005224A (ja) | 2003-01-08 |
KR20040011553A (ko) | 2004-02-05 |
EP1424590B1 (en) | 2011-03-16 |
US7072091B2 (en) | 2006-07-04 |
JP3804822B2 (ja) | 2006-08-02 |
CN1239953C (zh) | 2006-02-01 |
DE60239472D1 (de) | 2011-04-28 |
US20040207899A1 (en) | 2004-10-21 |
CN1520531A (zh) | 2004-08-11 |
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