WO2000036580A1 - Reversible electrochemical mirror for modulation of reflected radiation - Google Patents
Reversible electrochemical mirror for modulation of reflected radiation Download PDFInfo
- Publication number
- WO2000036580A1 WO2000036580A1 PCT/US1999/017990 US9917990W WO0036580A1 WO 2000036580 A1 WO2000036580 A1 WO 2000036580A1 US 9917990 W US9917990 W US 9917990W WO 0036580 A1 WO0036580 A1 WO 0036580A1
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- WIPO (PCT)
- Prior art keywords
- electrode
- mirror
- metal
- substrate
- disposed
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—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
Definitions
- This invention is concerned with devices, such as mirrors and windows, having controllable transmittance and reflectivity.
- Electrolytes described in the prior art literature contain auxiliary redox species (e.g., bromide, iodide, or chloride) that are oxidized (e.g.. to bromine, iodine, or chlorine) at the counter electrode during metal deposition, introducing chemistry-related instabilities during long term operation and greatly reducing the memory effect by o causing dissolution of the metal deposit on open circuit, e.g., 2Ag + Br 2 — > 2AgBr.
- auxiliary redox species e.g., bromide, iodide, or chloride
- oxidized e.g. to bromine, iodine, or chlorine
- this auxiliary redox process hinders metal deposition at the counter electrode during erasure of the light modulating deposit, introducing a threshold voltage that is desirable for display applications.
- This auxiliary redox process represents a significant side reaction even when metal plating/deplating occurs at the counter electrode and a threshold voltage is not observed. See, e.g., Warszawski, Columns 3-4
- Warszawski teaches that the use of a grid counter electrode would give a less uniform deposit since deposition on the transparent working electrode is highly localized m the vicinity of the counter electrode grid lines (a consequence of the very thin film of gel electrolyte used). Warszawski also teaches the use of an aqueous gel electrolyte to minimize sensitivity to atmospheric contaminants and to avoid the necessity of having a leak tight seal. Such electrolytes, however, have much more limited temperature and voltage operating ranges compared with organic-based electrolytes with high boiling solvents.
- Reversible electrodeposition devices known in the prior art have exhibited high-reflectivity mirror deposits as needed for applications requiring adjustable reflectivity.
- Reversible electrodeposition of mirror deposits could be used to automatically adjust the reflectivity of automotive rear and side view mirrors for optimum viewing under various lighting conditions.
- dissolution of some or all of the mirror deposit from a transparent electrode on a glass or plastic substrate could reduce mirror glare from headlights of following vehicles.
- the reversible electrodeposition approach for adjustable mirrors offers significant cost and safety advantages compared to available electrochromic mirrors, which require a relatively invariant cell gap and involve toxic chemicals (e.g., vioiogen).
- the electrochemical mirror of this invention permits efficient and precise control over the reflection of visible light and other electromagnetic radiation.
- the mirror includes a transparent first electrode, a surface modification layer on the first electrode, and a second electrode.
- An electrolytic solution is disposed between the first and second electrodes such that ions of a metal which can electrodeposit on the first and second electrodes are soluble in the electrolytic solution.
- the applied potential tends to cause deposited metal to be dissolved from the second electrode into the electrolytic solution and to be electrodeposited from the solution onto the first electrode.
- the surface modification layer facilitates substantially uniform nucleation of the electrodeposited metal in a mirror surface on the first electrode, such that the amount of deposited metal subsisting on the first electrode affects the reflectivity of the mirror for the radiation.
- the applied potential tends to cause deposited metal to be dissolved from the first electrode and electrodeposited from the solution onto the second electrode, thereby decreasing the reflectivity of the mirror.
- the reflectivity of the mirror deposit can be selectively adjusted from near 0% to almost 100%, depending on the amount of metal deposited on the conducting film.
- the second electrode may be a continuous or discontinuous electrical conductor.
- An underlayer may be provided between the second electrode and the second substrate to improve adhesion.
- the first electrode may be disposed uniformly on a first substrate, or may be disposed in a pattern.
- the surface modification layer may be a thin layer (i.e., sufficiently thin to be nominally transparent) of an inert metal which is electrochemically more stable towards oxidation than the electrodeposited metal.
- the surface modification layer may also be disposed uniformly on the first electrode, or may be disposed in a pattern.
- An underlayer may be added between the first electrode and the surface modification layer to improve adhesion.
- the electrolytic solution may include a gelling agent to form an aqueous or a non- aqueous gel electrolyte.
- Figure 1 is a cross sectional view depicting the general design of an electrochemical mirror constructed according to the invention for modulation of reflected radiation.
- Figure 2 is a cross sectional view similar to Figure 1 , but illustrating the state of the mirror when sufficient negative electrical potential has been applied to the first electrode relative to the second electrode to cause substantial quantities of the metal to deposit onto the first electrode.
- Figure 3 is a cross sectional view similar to Figures 1 and 2, but depicting the state of the mirror when sufficient positive electrical potential has been applied to the first electrode relative to the second electrode to cause substantially all of the metal to deposit on the second electrode.
- Figure 1 is a cross sectional view depicting the general design of an electrochemical mirror constructed according to our invention (some dimensions, particularly layer thicknesses, are disproportionate in the drawings in order to more effectively illustrate the structure and function of the invention).
- the mirror which allows precise, reversible control over the reflection of electromagnetic radiation, includes a first substrate 102, which is substantially transparent to the radiation to be controlled, and a second substrate 104.
- An electrically conducting film 106 which is also substantially transparent, is deposited on the first substrate.
- the film 106 with the addition of an electrochemically stable surface modification layer 108, functions as a first electrode.
- a second electrode 1 10 is deposited on the second substrate 104.
- the second electrode can alternatively be a bulk electrode, a metal plate or sheet for example, with sufficient rigidity that the second substrate 104 would not be needed.
- the second electrode 110 is electrochemically stable or is covered with a sufficient thickness of an active metal layer 114 to avoid exposure of the second electrode surface.
- the surface of electrode 110 may be roughened to reduce reflection of radiation from the electrode or to improve switching speed by lowering the current density.
- An electrolytic solution 112 is located between and in electrical contact with the electrodes 106 and 110.
- the mirror may be initially charged by depositing the metallic layer 114 on the electrode 110, i.e., the layer
- such a metallic layer may, alternatively, be initially deposited on the electrode 110, on the electrode 106 (i.e., on the surface modification layer 108 as a layer 120), or, as depicted in Figure 1, divided between a partial deposit on the electrode
- Electrode 110 If the electrode 110 is not itself composed of the mirror metal, the amount of metal in these initially deposited layers constitutes the maximum amount of metal which will be available for deposit, as explained in more detail below, to control the reflectivity of the mirror.
- the surface modification layer 108 applied to the first electrode 106 facilitates the nucleation on this electrode of electrodeposited metal from the ions 116.
- the mirror is intended for use in conjunction with a source of electrical potential 1 18, which has a reversible polarity and adjustable or pre-set positive and negative potential values, connected between the first and second electrodes 106 and 110.
- a source of electrical potential 1 18, which has a reversible polarity and adjustable or pre-set positive and negative potential values connected between the first and second electrodes 106 and 110.
- metal 114 deposited on the second electrode 110 will tend to be dissolved from the second electrode into the electrolytic solution 112, while metal ions 1 16 in the solution will tend to be electrodeposited from the solution onto the surface modification layer 108 of the first electrode 106.
- the surface modification layer 108 will tend to cause the metal to deposit in a substantially uniform layer, forming a mirror surface.
- the amount of deposited metal which remains on the first electrode will determine the reflectivity which the mirror demonstrates for radiation.
- the process is reversible and may be maintained at virtually any point between substantially complete deposition on and substantially complete erasure from the first electrode 106.
- the mirror may be adjusted to any reflective value from approximately 0% reflective to approximately 100% reflective.
- the lower limit of reflectivity for the mirror is affected by the reflectivities of the nucleation layer 108, the electrode 106, and the substrate 102; these reflectivities may be reduced by use of anti-reflection coatings of the type commonly employed, or by adjusting the layer thicknesses.
- Figure 2 is a cross sectional view similar to Figure 1, but illustrating the performance of the mirror when sufficient negative electrical potential has been applied to the first electrode relative to the second electrode for a sufficient period of time to cause a substantial layer of the metal to deposit onto the first electrode.
- the layer 120 created by the deposited metal, will function as a highly reflective mirror and will tend to reflect radiation, illustrated by the light beam 122, which impinges on the mirror.
- Figure 3 is a cross sectional view similar to Figures 1 and 2, but illustrating the behavior of the mirror when sufficient positive electrical potential has been applied to the first electrode relative to the second electrode for a sufficient period of time to cause substantially all of the metal to dissolve from the first electrode and to deposit as the metallic layer 1 14 on the second electrode.
- the mirror will impose a minimal impediment to incoming radiation, thereby allowing substantially all such incoming radiation to be transmitted through the first electrode 106 and surface modification layer 108 and to then be absorbed or dispersed by the electrolyte 112 or the deposited metal 114 on the second electrode 110, as illustrated by the light beam 124.
- the transmitted light might be absorbed or dispersed by a gel matrix if a gelled electrolyte is employed.
- An absorbing dye might also be added to the electrolyte or gel matrix to enhance light abso ⁇ tion.
- the amount of reflected light will be minimal.
- the preferred first electrode utilizes a glass or plastic substrate which is uniformly coated on one side with an optically transparent, low resistivity (about 10 ⁇ /square) ITO (indium tin oxide) or FTO (fluorine-doped tin oxide) film.
- An adherent inert metal such as Pt, is vapor deposited, preferably by sputtering, onto the ITO or FTO surface to enhance the rate of nucleation for metal deposition to yield a mirror deposit; other electrochemically inert metals can also be used, e.g., gold, palladium, rhodium, iridium, ruthenium, rhenium, etc.
- a duplex metal film e.g.. Ti/Au or Cr/Au, in which the underlayer metal (e.g., Ti or Cr) serves to improve adhesion of the noble metal to the substrate.
- An electrical bus connection is formed around the perimeter of the ITO or FTO coating.
- the preferred second electrode includes a sheet of the mirror metal (silver, for example) or of another metal, which has been roughened (by bead blasting, for example) to reduce reflection of radiation from the second electrode.
- a protective layer of an electrochemically inert metal, such as platinum, is used between the reactive substrate and the mirror metal.
- the second electrode Prior to cell assembly, the second electrode, if other than the mirror metal, is plated with a quantity of mirror metal sufficient to provide the desired amount of reflectivity when deposited on the first electrode and to prevent exposure of the second electrode substrate metal to the electrolyte. (Alternatively, the first electrode can be plated with the mirror metal).
- the preferred electrolyte is a gel electrolyte that is both chemically and electrochemically stable except with regard to electrodeposition of the mirror metal.
- the mirror metal is silver added to the electrolyte as a silver halide and stabilized in the electrolyte by addition of an excess of halide ions derived from addition of a halide salt having a cation that is not electroactive (e.g., lithium, sodium or potassium).
- halide ions derived from addition of a halide salt having a cation that is not electroactive (e.g., lithium, sodium or potassium).
- Other mirror metals having relatively low toxicity and good electrochemical characteristics include copper and bismuth.
- a mixture of halide ions chloride, iodide, bromide
- the solvent is chosen with respect to its freezing and boiling point to provide the desired temperature operating range, as well as good electrolyte stability and good mirror cycling characteristics.
- Preferred solvents include water, dimethylsulfoxide (DMSO), ethylene glycol, gamma-butyrolactone (GBL), dimethyl formamide (DMF) and mixtures of these.
- DMSO dimethylsulfoxide
- GBL gamma-butyrolactone
- DMF dimethyl formamide
- Ag(I) and Cu(I) can also be stabilized by nitriles.
- amines, phosphines, sulfur donors, etc., e.g. [Cu(nitrile) 4 ]CF3SO 3 Additives that are electroactive or decomposed during electrodeposition of the mirror metal, such as organic compounds normally used for leveling and brightening electrodeposits. should be avoided since they would limit the mirror cycle life.
- electrolyte stiffener is preferred to facilitate mirror fabrication, to minimize electrolyte loss that may affect mirror performance or create a chemical safety hazard, and to adhesively hold glass fragments formed during accidental breakage that could otherwise cause physical personal injury.
- Preferred electrolyte stiffeners include organic gelling agents, e.g., polyacrylonitrile (PAN), polyvinylalcohol (PVA), polyvinylacetate (PVOAc), and polymethylmethacrylate (PMMA), which dissolve in liquid electrolytes to form transparent plastic-like gels at ambient temperatures.
- the electrolyte can retain the conductivity of the liquid electrolyte, yet be cut and applied as a "solid state" component.
- the specific organic polymer gelling agent is chosen based on chemical and electrochemical compatibility with a given electrolyte and metal mirror reaction.
- Other possible electrolyte stiffeners include porous solid polymers that absorb large quantities of electrolyte, e.g., ormasils and porous polypropylene.
- the reversible electrochemical cells of this invention can be fabricated using spacers and a polymer sealant, or using a gasket or o-ring to provide both the proper spacing and a seal.
- the spacer and seal materials must be chemically compatible with the electrolyte. Good results have been obtained with polypropylene spacers and silicone sealants.
- the preferred electrode separation is about 0.05 - 3.0 mm. Electrical contact is made to the metal bus on each electrode and connected to a voltage source for switching.
- An adjustable reflectivity cell having a viewing area of 7.6 x 12.7 cm was constructed using a mirror electrode comprised of a 30 A sputtered platinum nucleation layer on
- the counter electrode was a 25 ⁇ m thick silver foil (99.99% purity) that had been roughened by bead blasting (170 grit) and was mechanically supported by a thick plastic backing plate.
- the electrolyte was
- An adjustable reflectivity cell having a viewing area of 7.6 x 12.7 cm was constructed using a mirror electrode comprised of a 30 A sputtered platinum nucleation layer on
- Example 1 11 ohm/square FTO film on a glass substrate.
- the counter electrode was 25 ⁇ m thick silver electrodeposited from a commercial plating bath on a copper plate that had been roughened by sanding (400 grit).
- Cell fabrication procedures and the electrolyte were the same as for Example 1. This cell also exhibited excellent mirror formation and erasure and was cycled between -0.4 V for 25 s and +0.25 V for 65 s for 100,000 cycles without significant degradation in the mirror quality.
- the transparent conducting film of the first electrode to improve nucleation, e.g., by vapor deposition of a very thin, yet optically transparent (-15-200 A) "seed" layer of an electrochemically inert metal (e.g., platinum or gold).
- This seed layer minimizes metal deposition overvoltage and enhances the rate of nucleation so that mirror deposits are obtained.
- Other surface treatments e.g., electrodeposition of an inert metal layer
- the nucleation layer must be microscopically continuous, which may not be the case for some metallization treatments on some transparent conductor substrates.
- the two-step process commonly used to metallize printed wiring boards prior to copper plating may not produce sufficiently continuous films with adequate adhesion.
- the transparent conductor e.g., ITO or FTO
- the metal nucleation layer can be patterned as desired.
- Also useful in attaining a mirror deposit are additives that adsorb on the electrode surface, thereby inhibiting the metal deposition process, and additives that complex the mirror metal ions, thereby raising the overvoltage for metal deposition.
- additives that adsorb on the electrode surface, thereby inhibiting the metal deposition process and additives that complex the mirror metal ions, thereby raising the overvoltage for metal deposition.
- Most of the organic addition agents used in the plating industry to brighten and level deposits are electrochemically consumed during the metal deposition process and would be inappropriate.
- the mirror of this invention is an electroreflective device (light reflection changed by application of voltage), rather than an electrochromic device (light abso ⁇ tion changed by applied voltage) as is typical of the devices taught in the prior art.
- the electrochemical mirror is operated well within the electrolyte stability region, so that excessive metal plating or deplating is not harmful.
- the mirror is self- limiting for the mirror electrode when biased within the voltage stability region, since the current will practically cease when the deposited metal is depleted at that electrode.
- a porous cell separator e.g., porous polypropylene, may be used to provide a matrix for containing a liquid electrolyte and to prevent shorting of the two electrodes in the event of extreme flexure of the cell.
- a wide temperature operating range is obtained by using electrolytes based on high boiling organic solvents, e.g.. dimethylsulfoxide, ethylene glycol, propylene carbonate, sulfoiane, ⁇ -butyrolactone, tetraglyme, etc. Use of mixtures of these solvents can extend the temperature range to lower operating temperatures.
- organic solvents e.g.. dimethylsulfoxide, ethylene glycol, propylene carbonate, sulfoiane, ⁇ -butyrolactone, tetraglyme, etc.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99942046A EP1159727A4 (en) | 1998-12-15 | 1999-08-09 | Reversible electrochemical mirror for modulation of reflected radiation |
JP2000588749A JP2003522338A (en) | 1998-12-15 | 1999-08-09 | Reversible electrochemical mirror for adjustment of reflected radiation |
BR9916346-2A BR9916346A (en) | 1998-12-15 | 1999-08-09 | Electrochemical mirror to reversibly control the reflection of electromagnetic radiation |
AU55509/99A AU5550999A (en) | 1998-12-15 | 1999-08-09 | Reversible electrochemical mirror for modulation of reflected radiation |
CA002355156A CA2355156C (en) | 1998-12-15 | 1999-08-09 | Reversible electrochemical mirror for modulation of reflected radiation |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
USPCT/US98/26610 | 1998-12-15 | ||
PCT/US1998/026610 WO1999032929A1 (en) | 1997-12-19 | 1998-12-15 | Electrodeposition cell with high light transmission |
US09/333,385 US6166847A (en) | 1997-12-19 | 1999-06-15 | Reversible electrochemical mirror for modulation of reflected radiation |
US09/333,385 | 1999-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000036580A1 true WO2000036580A1 (en) | 2000-06-22 |
Family
ID=26794553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/017990 WO2000036580A1 (en) | 1998-12-15 | 1999-08-09 | Reversible electrochemical mirror for modulation of reflected radiation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1159727A4 (en) |
JP (1) | JP2003522338A (en) |
CA (1) | CA2355156C (en) |
WO (1) | WO2000036580A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1228398A1 (en) * | 1999-09-30 | 2002-08-07 | Innovative Technology Licensing, LLC | Diffusely-reflecting reversible electrochemical mirror |
US9651844B2 (en) | 2014-11-27 | 2017-05-16 | Electronics And Telecommunications Research Institute | Reversible electrochemical mirror |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5008273B2 (en) * | 2005-05-06 | 2012-08-22 | アンデス電気株式会社 | Electrochemical display element |
JP5649272B2 (en) * | 2008-08-19 | 2015-01-07 | キヤノン株式会社 | Reflective display device |
JP6461643B2 (en) * | 2015-02-26 | 2019-01-30 | スタンレー電気株式会社 | Optical device |
Citations (6)
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US4153345A (en) * | 1976-05-19 | 1979-05-08 | Commissariat A L'energie Atomique | Electrolytic display device |
US4283121A (en) * | 1978-06-30 | 1981-08-11 | Commissariat L'energie | Electrolytic display cells with a metal deposit |
US4361386A (en) * | 1979-10-17 | 1982-11-30 | Commissariat A L'energie Atomique | Electrolytic display cell |
US4431989A (en) * | 1980-07-03 | 1984-02-14 | Commissariat A L'energie Atomique | Apparatus for electrolytic clear display on a dull base |
US5056899A (en) * | 1987-07-24 | 1991-10-15 | Alpine Polyvision, Inc. | Material for light modulation and manufacturing processes |
US5912759A (en) * | 1997-04-28 | 1999-06-15 | Wisconsin Label Corporation | Electrochemical display cell with focused field |
Family Cites Families (6)
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US3153113A (en) * | 1961-01-26 | 1964-10-13 | Eastman Kodak Co | Electroplating light valve |
FR2505068A1 (en) * | 1981-04-30 | 1982-11-05 | Jaeger | PERFECTED ELECTRODE FOR ELECTROLYTIC DISPLAY CELLS AND METHOD FOR MANUFACTURING THE SAME |
DE3513988A1 (en) * | 1985-04-18 | 1986-10-23 | Robert Bosch Gmbh, 7000 Stuttgart | APPLICATION OF THE ELECTROLYSIS METHOD FOR CHANGING THE REFLECTION LEVEL OF MIRRORS |
US5293546A (en) * | 1991-04-17 | 1994-03-08 | Martin Marietta Corporation | Oxide coated metal grid electrode structure in display devices |
US5774255A (en) * | 1996-09-23 | 1998-06-30 | Mcdonnell Douglas Corporation | Adaptive infrared modulator |
US5923456A (en) * | 1997-12-19 | 1999-07-13 | Rockwell International Corporation | Reversible electrochemical mirror |
-
1999
- 1999-08-09 CA CA002355156A patent/CA2355156C/en not_active Expired - Fee Related
- 1999-08-09 WO PCT/US1999/017990 patent/WO2000036580A1/en active IP Right Grant
- 1999-08-09 JP JP2000588749A patent/JP2003522338A/en not_active Withdrawn
- 1999-08-09 EP EP99942046A patent/EP1159727A4/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4153345A (en) * | 1976-05-19 | 1979-05-08 | Commissariat A L'energie Atomique | Electrolytic display device |
US4283121A (en) * | 1978-06-30 | 1981-08-11 | Commissariat L'energie | Electrolytic display cells with a metal deposit |
US4361386A (en) * | 1979-10-17 | 1982-11-30 | Commissariat A L'energie Atomique | Electrolytic display cell |
US4431989A (en) * | 1980-07-03 | 1984-02-14 | Commissariat A L'energie Atomique | Apparatus for electrolytic clear display on a dull base |
US5056899A (en) * | 1987-07-24 | 1991-10-15 | Alpine Polyvision, Inc. | Material for light modulation and manufacturing processes |
US5912759A (en) * | 1997-04-28 | 1999-06-15 | Wisconsin Label Corporation | Electrochemical display cell with focused field |
Non-Patent Citations (1)
Title |
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See also references of EP1159727A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1228398A1 (en) * | 1999-09-30 | 2002-08-07 | Innovative Technology Licensing, LLC | Diffusely-reflecting reversible electrochemical mirror |
EP1228398A4 (en) * | 1999-09-30 | 2005-09-14 | Rockwell Scient Licensing Llc | Diffusely-reflecting reversible electrochemical mirror |
US9651844B2 (en) | 2014-11-27 | 2017-05-16 | Electronics And Telecommunications Research Institute | Reversible electrochemical mirror |
Also Published As
Publication number | Publication date |
---|---|
CA2355156A1 (en) | 2000-06-22 |
EP1159727A4 (en) | 2002-01-30 |
CA2355156C (en) | 2004-07-06 |
JP2003522338A (en) | 2003-07-22 |
EP1159727A1 (en) | 2001-12-05 |
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