US5293546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxide coated metal grid electrode structure in display devices
Assignee: MARTIN MAIETTA Corp 6801 ROCKLEDGE DRIVE BETHESDA MARYLAND 20817 A CORP OF MARYLAND
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Filing: 1991-04-17
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Granted: 1994-03-08
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Expires: 2011-04-17
Abstract
Abstract An improved working electrode for use in display devices is disclosed. The working electrode comprises a transparent metal grid having a coating of metal oxide thereon. Suitable metal grids include Cu, Au, Ag, Al, Pt, Ni and Zn, while suitable metal oxide coatings include In 2 O 3 , SnO 2 and indium tin oxide (ITO). The display devices preferably include an electrochromic material comprising an aqueous solution of an electrochemically depositable metal. Display devices in which the present working electrode is used possess favorable characteristics such as rapid response times, wide dynamic range, high transmittance and improved uniformity. The devices are particularly suitable for large surface area applications.
Inventors
- 👤 Maher E. Tadros
- 👤 James A. Mason
- 👤 Christopher A. Kadoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:30
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/155; G02F1/1506; G02F1/1508
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
55 words
A display device comprising: (a) a working electrode comprising a metal grid having an electrically conductive metal oxide coating disposed thereon; (b) a counter electrode; and (c) an electrochromic material disposed between the working electrode and counter electrode wherein the electrically conductive metal oxide coating is disposed between the metal grid and the electrochromic material.
Claim 2
Dependent Claim
55 words
A display device comprising: (a) a working electrode comprising a metal grid having an electrically conductive metal oxide coating disposed thereon; (b) a counter electrode; and (c) an electrochromic material disposed between the working electrode and counter electrode wherein the electrically conductive metal oxide coating is disposed between the metal grid and the electrochromic material.
Claim 3
Dependent Claim
22 words
A display device according to claim 1, wherein the metal grid comprises Cu, Au, Ag, Al, Pt, Ni, Zn and combinations thereof.
Claim 4
Dependent Claim
13 words
A display device according to claim 1, wherein the metal grid comprises Au.
Claim 5
Dependent Claim
27 words
A display device according to claim 1, wherein the electrically conductive metal oxide coating comprises indium oxide, tin oxide, indium tin oxide, zinc oxide or cadmium stannate.
Claim 6
Dependent Claim
18 words
A display device according to claim 1, wherein the electrically conductive metal oxide coating comprises indium tin oxide.
Claim 7
Dependent Claim
26 words
A display device according to claim 1, wherein the working electrode further comprises a substrate upon which the metal grid and metal oxide coating are disposed.
Claim 8
Dependent Claim
20 words
A display device according to claim 6, wherein the substrate comprises a glass selected from soda glass and borosilicate glass.
Claim 9
Dependent Claim
19 words
A display device according to claim 6, wherein the substrate comprises a polymer selected from polyethylene polytetrafluoroethylene and polyester.
Claim 10
Dependent Claim
12 words
A display device according to claim 6, wherein the substrate comprises polyethylene.
Claim 11
Dependent Claim
19 words
A display device according to claim 1, wherein the electrochromic material comprises an aqueous solution of an electrodepositable metal.
Claim 12
Dependent Claim
18 words
A display device according to claim 10, wherein the electrodepositable metal is Zn, Co, Ni or combinations thereof.
Claim 13
Dependent Claim
25 words
A display device according to claim 10, wherein the electrodepositable metal is provided from a metal salt selected from chlorides, bromides, iodides and combinations thereof.
Claim 14
Dependent Claim
21 words
A display device according to claim 1, wherein the electrochromic material comprises a polymer selected from polyaniline, polyacetylene, polypyrrole and polythiophene.
Claim 15
Dependent Claim
27 words
A display device according to claim 1, wherein the electrochromic material comprises a metal oxide selected from WO 3 , MoO 3 , and Ni(OH) 2 .
Claim 16
Dependent Claim
14 words
A display device according to claim 1, wherein the electrochromic material comprises Prussian blue.
Claim 17
Dependent Claim
20 words
A display device according to claim 1, wherein the device has a response time of less than about 200 milliseconds.
Claim 18
Dependent Claim
21 words
A display device according to claim 16, wherein the device has a surface area of greater than about 1 square inch.
Claim 19
Dependent Claim
32 words
A display device according to claim 1, wherein the device is capable of switching from a reflectance of greater than about 70 percent to a reflectance of less than about 30 percent.
Claim 20
Dependent Claim
16 words
A display device according to claim 1, wherein the electrically conductive metal oxide coating is transparent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-07 | 1997-09-06 | 1998-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-07 | 2001-09-06 | 2002-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-07 | 2005-09-06 | 2006-03-08 | $7700.00 | Window Closed / Lapsed |