FR2473203A1 - Electrochemical display cell - with methylene blue soln. between electrodes at least one of which is transparent - Google Patents
Electrochemical display cell - with methylene blue soln. between electrodes at least one of which is transparent Download PDFInfo
- Publication number
- FR2473203A1 FR2473203A1 FR8000080A FR8000080A FR2473203A1 FR 2473203 A1 FR2473203 A1 FR 2473203A1 FR 8000080 A FR8000080 A FR 8000080A FR 8000080 A FR8000080 A FR 8000080A FR 2473203 A1 FR2473203 A1 FR 2473203A1
- Authority
- FR
- France
- Prior art keywords
- soln
- electrodes
- cell according
- solution
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229960000907 methylthioninium chloride Drugs 0.000 title abstract description 4
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 title abstract description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 11
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 claims abstract description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims abstract description 3
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 3
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 3
- 229920000642 polymer Polymers 0.000 claims abstract description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 3
- 239000007787 solid Substances 0.000 claims abstract 3
- 239000000654 additive Substances 0.000 claims abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000243 solution Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000008151 electrolyte solution Substances 0.000 claims 4
- 239000003125 aqueous solvent Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 claims 1
- 210000004027 cell Anatomy 0.000 abstract description 15
- 230000005284 excitation Effects 0.000 abstract description 4
- CMSGUKVDXXTJDQ-UHFFFAOYSA-N 4-(2-naphthalen-1-ylethylamino)-4-oxobutanoic acid Chemical compound C1=CC=C2C(CCNC(=O)CCC(=O)O)=CC=CC2=C1 CMSGUKVDXXTJDQ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011521 glass Substances 0.000 abstract description 2
- 235000011149 sulphuric acid Nutrition 0.000 abstract description 2
- 210000002421 cell wall Anatomy 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 230000003446 memory effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 210000001874 anterior cell Anatomy 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229910000457 iridium oxide Inorganic materials 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium(II) oxide Chemical compound [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 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
- G02F1/1503—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 oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
Description
La présente invention a pour objet une. cellule. The present invention relates to a. cell.
,d'affichage électrochimique. Elle trouve une application dans l'affichage de caractères alphanumériques., electrochemical display. It finds an application in the display of alphanumeric characters.
Les cellules d'affichage électrochimiques constituent un moyen intéressant pour réaliser des écrans de visualisa- tison. Les phénomènes qui sont à la base du fonctionnement de ces dispositifs peuvent être de natures diverses : dépôt de couches métalliques réfléchissantes ou absorbantes (cas des couches d'argent par exemple) ou changement de coloration sous l'action d'un courant (cas de l'oxyde de tungsttne par exemple, ou de l'oxyde d'iridium, etc.). Electrochemical display cells constitute an interesting means for producing display screens. The phenomena which are at the basis of the functioning of these devices can be of various natures: deposition of reflective or absorbent metallic layers (case of silver layers for example) or change of coloration under the action of a current (case of tungsten oxide for example, or iridium oxide, etc.).
La présente invention se rapporte au second type de cellule, dans lequel un affichage est obtenu par changement de coloration ou apparition.de coloration sous l'effet du passage d'un courant électrique dans un sens et un effacement est réalisé par le passage diun courant. dans l'autre sens. The present invention relates to the second type of cell, in which a display is obtained by change of coloration or appearance of coloration under the effect of the passage of an electric current in one direction and an erasure is carried out by the passage of a current . in the other direction.
La plupart des cellules d'affichage de ce genre souffrent d'inconvénients liés au fat que les produits entrant dans la composition du milieu reactif sont coteaux et difficiles de mise en oeuvre. Most display cells of this kind suffer from drawbacks linked to the fact that the products used in the composition of the reactive medium are hillsides and difficult to use.
La présente invention a justement pour but de proposer une cellule d'affichage électrochimique dans laquelle le milieu réactionnel soit particulièrement bon marché et de mise en oeuvre aisée. The object of the present invention is precisely to propose an electrochemical display cell in which the reaction medium is particularly inexpensive and easy to implement.
Ce but est atteint selon l'invention par l'utilisa- tion de bleu de méthylbne en association avec un électrolyte. This object is achieved according to the invention by the use of methylene blue in combination with an electrolyte.
De préférence, cette solution est mélangée a de l'oxyde de titane (TiO) en poudre. D'autres poudres peuvent être utilisées comme ZnO, A1203 et GeO2, ou des mélanges de ces poudres (par exemple TiO2 + GeO2). Preferably, this solution is mixed with powdered titanium oxide (TiO). Other powders can be used such as ZnO, A1203 and GeO2, or mixtures of these powders (for example TiO2 + GeO2).
Le solvant utilisé peut être une solution aqueuse ac.tde sulfurique par exemple, additionné éventuellement d'autres produits (glycérol, alcool polyvinylique ou autres polymères) qui améliorent les performances et notamment l'effet mémoire. The solvent used may be an aqueous solution of sulfuric acid, for example, optionally added with other products (glycerol, polyvinyl alcohol or other polymers) which improve performance and in particular the memory effect.
Mais le solvant peut être aussi un électrolyte solide tel par exemple qu'une résine échangeuse d'ions. However, the solvent can also be a solid electrolyte such as, for example, an ion exchange resin.
En ce qui concerne la réalisation des électrodes et des parois de la cellule, la technologie utilisée pour les cellules connues reste applicable dans l'invention. With regard to the production of the electrodes and the walls of the cell, the technology used for the known cells remains applicable in the invention.
Le verre dit "NESA" est utilisable.The glass called "NESA" can be used.
La cellule de l'invention offre un aspect blanc ou bleu contrasté, selon son excitation. L'effet mémoire est supérieur à 1 mn et le temps d'inscription inférieur la seconde. Un nombre de cycles affichage-effacement supérieur à 104 peut être atteint. The cell of the invention offers a contrasting white or blue appearance, depending on its excitation. The memory effect is greater than 1 minute and the registration time less than one second. A number of display-erase cycles greater than 104 can be reached.
La tension d'excitation de la cellule est faible et inférieure à 2V. Le circuit électronique de commande est donc particulièrement simple à réaliser, contrairement à d'autres cellules de l'art antérieur qui requièrent des tensions de quelques dizaines de volts qui s'accommodent mal avec l'utilisation de circuits intégrés. The cell excitation voltage is low and less than 2V. The electronic control circuit is therefore particularly simple to produce, unlike other cells of the prior art which require voltages of a few tens of volts which do not accommodate well with the use of integrated circuits.
L'intensité peut être de l'ordre de 10 mA/cm2. Une énergie de 1 mJ suffit en général pour une inscription sur 1 cm2. Avec de telles conditions, un changement de teinte peut être obtenu en moins de 40 ms. On observera que cette durée permet d'obtenir une cadence d'affichage de 25 images par seconde comme pour le cinéma ou la télévision. The intensity can be of the order of 10 mA / cm2. An energy of 1 mJ is generally sufficient for an inscription on 1 cm2. With such conditions, a color change can be obtained in less than 40 ms. It will be observed that this duration makes it possible to obtain a display rate of 25 images per second as for cinema or television.
L'invention peut donc s'appliquer aisément à ces deux domaines.The invention can therefore easily be applied to these two fields.
Enfin, les tolérances sur la géométrie de la cellule et notamment sur son épaisseur sont plus grandes que pour. Finally, the tolerances on the geometry of the cell and in particular on its thickness are greater than for.
les cellules antérieures. Cette épaisseur peut être comprise entre 10 et 100 m environ.the anterior cells. This thickness can be between 10 and 100 m approximately.
On observera que les produits mentionnés plus haut ne se décomposent pas, ne s'altèrent pas à l'air et ne sont pas toxiques, ce qui confère à la cellule de l'n-- vention une grande facilité de mise en oeuvre. It will be observed that the products mentioned above do not decompose, do not deteriorate in air and are not toxic, which gives the cell of the invention great ease of use.
A titre indicatif, une composition possible conforme à l'invention est la suivante - TiO2 50 % en poids - H2SO4 0,5 % en poids - bleu de méthylène 2 % - glycérol 20 % -H20 q.s. 100* As an indication, a possible composition in accordance with the invention is as follows - TiO2 50% by weight - H2SO4 0.5% by weight - methylene blue 2% - glycerol 20% -H20 q.s. 100 *
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8000080A FR2473203A1 (en) | 1980-01-03 | 1980-01-03 | Electrochemical display cell - with methylene blue soln. between electrodes at least one of which is transparent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8000080A FR2473203A1 (en) | 1980-01-03 | 1980-01-03 | Electrochemical display cell - with methylene blue soln. between electrodes at least one of which is transparent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2473203A1 true FR2473203A1 (en) | 1981-07-10 |
Family
ID=9237190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8000080A Withdrawn FR2473203A1 (en) | 1980-01-03 | 1980-01-03 | Electrochemical display cell - with methylene blue soln. between electrodes at least one of which is transparent |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2473203A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2516680A1 (en) * | 1981-11-16 | 1983-05-20 | Anizan Paul | Electrolytic display cell contg. phenothiazine derivs. - with two oxidn. states of differing colour |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3451741A (en) * | 1966-06-15 | 1969-06-24 | Du Pont | Electrochromic device |
| FR2060355A1 (en) * | 1969-09-02 | 1971-06-18 | Polaroid Corp | |
| FR2245042A1 (en) * | 1973-09-21 | 1975-04-18 | Matsushita Electric Ind Co Ltd | |
| US3951521A (en) * | 1964-06-02 | 1976-04-20 | Xerox Corporation | Reversible radiant energy filter and process of using same |
| FR2325955A1 (en) * | 1975-09-24 | 1977-04-22 | Timex Corp | ELECTROCHROIC DEVICE EQUIPPED WITH A SEPARATOR FORMED BY A CATION EXCHANGER RESIN |
| FR2334737A1 (en) * | 1975-12-08 | 1977-07-08 | Ici Ltd | Electrochromic display compsn. - contg. an electrolyte and an opacifier |
-
1980
- 1980-01-03 FR FR8000080A patent/FR2473203A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3951521A (en) * | 1964-06-02 | 1976-04-20 | Xerox Corporation | Reversible radiant energy filter and process of using same |
| US3451741A (en) * | 1966-06-15 | 1969-06-24 | Du Pont | Electrochromic device |
| FR2060355A1 (en) * | 1969-09-02 | 1971-06-18 | Polaroid Corp | |
| FR2245042A1 (en) * | 1973-09-21 | 1975-04-18 | Matsushita Electric Ind Co Ltd | |
| FR2325955A1 (en) * | 1975-09-24 | 1977-04-22 | Timex Corp | ELECTROCHROIC DEVICE EQUIPPED WITH A SEPARATOR FORMED BY A CATION EXCHANGER RESIN |
| FR2334737A1 (en) * | 1975-12-08 | 1977-07-08 | Ici Ltd | Electrochromic display compsn. - contg. an electrolyte and an opacifier |
Non-Patent Citations (3)
| Title |
|---|
| EXBK/62 * |
| EXBK/72 * |
| EXBK/75 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2516680A1 (en) * | 1981-11-16 | 1983-05-20 | Anizan Paul | Electrolytic display cell contg. phenothiazine derivs. - with two oxidn. states of differing colour |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4573768A (en) | Electrochromic devices | |
| US4325611A (en) | Electrochromic material and electro-optical display using same | |
| JPS6027002B2 (en) | Controllable electrochromic indicator | |
| US4182551A (en) | Electrochromic display device | |
| FR2671558A1 (en) | ELECTROLYTIC MATERIAL FOR THE MODULATION OF LIGHT AND ELECTRO-OPTICAL DEVICES USING THE MATERIAL | |
| US5274485A (en) | Liquid crystal display | |
| SE7903659L (en) | GALVANIC PRIMER CELL AND WAY TO IMPROVE THE ELECTRICAL PROPERTIES OF SUCH CELL | |
| FR2473203A1 (en) | Electrochemical display cell - with methylene blue soln. between electrodes at least one of which is transparent | |
| US4699471A (en) | Electrochromic display device | |
| US4960323A (en) | Method for maintaining the electrochromic activity of an electrochromic material | |
| US4762401A (en) | Electrochromatic system with third electrode | |
| EP0020468A1 (en) | Optoelectric cell | |
| CH616244A5 (en) | ||
| US4365010A (en) | Photoelectrochromic generator and display device | |
| DE7517076U (en) | ELECTROCHROME DISPLAY DEVICE | |
| Kuwabara et al. | All-solid-state electrochromic device. 2. Characterization of transition-metal oxide thin films for counter electrode | |
| JPS56143419A (en) | All solid-state type electrochromic display cell having anodically oxidized dielectric layer | |
| DE2538204A1 (en) | DEVICE WITH VARIABLE LIGHT TRANSMISSION | |
| Harima et al. | C-photoelectrolytic formation of free patterns of color images | |
| JPS607672B2 (en) | solid display | |
| JPS6360366B2 (en) | ||
| JPS60188931A (en) | Manufacture of electrochromic display element | |
| YOSHINO et al. | Electrolytic Synthesis of Hydrated IrOx Thin Films and Their Electrochromic Properties | |
| KR20030040653A (en) | A method for preparing a titanium oxide film for counter electrode of electrochromic display device and the film prepared thereby | |
| JP2642884B2 (en) | Method for producing nickel oxide film by thermal oxidation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |