Patent US3971624A successfully refreshed from Google Patents.
US3971624A
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Controllable electrochromic indicator device with ionic conducting intermediate layer and non-polarizable electrodes
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1975-05-06
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Granted: 1976-07-27
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Expires: 1995-05-06
Abstract
Abstract A controllable electrochromic indicator device is disclosed which includes two electrodes, an electrochromic layer and an adjacent charge-carrier-transmitting insulator layer situated between the two electrodes and at least one of the electrodes being deposited on a supporting plate and at least one of the electrodes being transparent. The charge carrier transmitting insulator layer is a good ion conductor and functions to almost completely block the flow of electrons. At least one of the electrodes is non-polarizable and is disposed in direct contact with the ion conductor.
Inventors
- 👤 Peter Bruesch
- 👤 Fritz Lehmann
- 👤 Claus Schuler
- 👤 Hans-Rudolf Zeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
81 words
A controllable electrochomic indicator device comprising: two electrodes, an electrochromic layer and an adjacent charge-carrier-transmitting insulator layer situated between the two electrodes, at least one of the electrodes being deposited on a supporting plate and at least one of the electrodes being transparent, the charge carrier transmitting insulator layer being a good ion conductor and functioning to almost completely block the flow of electrons, and at least one of the electrodes being non-polarizable and disposed in contact with the ion conductor.
Claim 2
Dependent Claim
81 words
A controllable electrochomic indicator device comprising: two electrodes, an electrochromic layer and an adjacent charge-carrier-transmitting insulator layer situated between the two electrodes, at least one of the electrodes being deposited on a supporting plate and at least one of the electrodes being transparent, the charge carrier transmitting insulator layer being a good ion conductor and functioning to almost completely block the flow of electrons, and at least one of the electrodes being non-polarizable and disposed in contact with the ion conductor.
Claim 3
Dependent Claim
45 words
A controllable electrochomic indicator device as in claim 1 wherein the specific ionic conductivity of the ion conductor lies approximately between 10 - 1 and 10 - 10 Ω - 1 cm - 1 and its film thickness can be as much as 20 μ.
Claim 4
Dependent Claim
17 words
A controllable electrochromic indicator device as in claim 1 wherein the ion conductor is a crystalline substance.
Claim 5
Dependent Claim
16 words
A controllable electrochromic indicator device as in claim 3 wherein the crystalline substance is silver iodide.
Claim 6
Dependent Claim
27 words
A controllable electrochromic indicator device as in claim 3 wherein the crystal is Li 2 SO 4 , CuBr, CuI, Rb 4 AgI 5 or β -alumina.
Claim 7
Dependent Claim
19 words
A controllable electrochromic indicator device as in claim 1 wherein the ion conductor is an amorphous or polycrystalline substance.
Claim 8
Dependent Claim
26 words
A controllable electrochromic indicator device as in claim 6 characterized by the fact that the amorphous substance is a SiO 2 --B 2 O 3 glass.
Claim 9
Dependent Claim
36 words
A controllable electrochromic indicator device as in claim 7 wherein the SiO 2 --B 2 O 3 glass has approximately the mole percent composition 25Li 2 O + 50SiO 2 + 25B 2 O 3 .
Claim 10
Dependent Claim
44 words
A controllable electrochromic indicator device as in claim 7 wherein the SiO 2 --B 2 O 3 glass has approximately the mole percent composition 35Li 2 O + 28Li 2 SO 4 + 7(LiCl) 2 + 4SiO 2 + 26B 2 O 3 .
Claim 11
Dependent Claim
17 words
A controllable electrochromic indicator device as in claim 1 wherein the ion conductor is an ion-conducting polymer.
Claim 12
Dependent Claim
16 words
A controllable electrochromic indicator device as in claim 10 wherein the polymer is perflouorated sulfonic acid.
Claim 13
Dependent Claim
31 words
A controllable electrochromic indicator device as in claim 1 wherein the electrochromic layer comprises oxides and oxide mixtures of the metals manganese, molybdenum, niobium, palladium, platinum, rhenium, titanium, vanadium or tungsten.
Claim 14
Dependent Claim
28 words
A controllable electrochromic indicator device as in claim 12 wherein the oxides and oxide mixtures comprise WO 3 , MoO 3 , and/or WO 3 /MoO 3 .
Claim 15
Dependent Claim
18 words
A controllable electrochromic indicator device as in claim 1 wherein the non-polarizable electrode is a mixed ion-electron conductor.
Claim 16
Dependent Claim
20 words
A controllable electrochromic indicator device as in claim 14 wherein the mixed ion-electron conductor is a tungsten and/or molybdenum bronze.
Claim 17
Dependent Claim
56 words
A controllable electrochromic indicator device as in claim 15 wherein the bronze has the composition MxY, where 0 < x < 1 and M = Li, Na, K, Rb, Cs, Be, Mg, Ca, Ba, Sr, H, NH 4 , Cu or Ag while Y = WO 3 , MoO 3 or WO 3 /MoO 3 .
Claim 18
Dependent Claim
18 words
A controllable electrochromic indicator device as in claim 14 wherein the mixed ion-electron conductor is an electrochromic layer.
Claim 19
Dependent Claim
40 words
A controllable electrochromic indicator device as in claim 16 wherein the non-polarizable electrode is Ag x Y or Li x Y, where Y = WO 3 , MoO 3 , WO 3 /MoO 3 and 0 < x < 1.
Claim 20
Dependent Claim
26 words
A controllable electrochromic indicator device as in claim 18 wherein the proportion x of Ag or Li in the non-polarizable electrode is between 0.7 and 0.85.
Claim 21
Dependent Claim
26 words
A controllable electrochromic indicator device as in claim 18 wherein the proportion x of Ag or Li in the electrochromic layer is between 0 and 0.3.
Claim 22
Dependent Claim
16 words
A controllable electrochromic indicator device as in claim 17 wherein the two electrochromic layers are similar.
Claim 23
Dependent Claim
19 words
A controllable electrochromic indicator device as in claim 14 wherein the mixed ion-electron conductor contains hydrogen-bearing platinum and/or palladium.
Claim 24
Dependent Claim
26 words
A controllable electrochromic indicator device as in claim 14 wherein the mixed ion-electron conductor contains graphite-alkali metal alloys or selenides and sulfides of silver and tungsten.
Claim 25
Dependent Claim
27 words
A controllable electrochromic indicator device as in claim 1 wherein the non-polarizable electrode is coated at least partially on the rear surface with a metallic contact film.
References Cited (Backward Citations)
US3521941A
Cited
US3712710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |