US4239350A
Expired / Lapsed
US
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Electrochromic display device
Assignee: Toshiba Corp
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Filing: 1979-04-18
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Granted: 1980-12-16
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Expires: 1999-04-18
Abstract
Abstract An electrochromic display device comprises a display electrode, a counter electrode spaced from the display electrode, an electrolyte filled in the space between the display and counter electrodes, a first coloring layer formed on the display electrode and a second coloring layer laid on the first coloring layer. The first coloring layer is a crystalline layer containing electrochromic material and having a specific pattern. The second coloring layer is an amorphous layer containing electrochromic material.
Inventors
- 👤 Hiroshi Morita
- 👤 Hiroshi Washida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/1533; G02F1/1514; G02F1/1523; G02F1/1524; G02F1/161
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
An electrochromic display device comprising: a display electrode; a counter electrode spaced from the display electrode; an electrolyte filled in the space between the display electrode and the counter electrode; a first coloring crystalline layer formed on the display electrode, containing electrochromic material and having a specific pattern; and a second coloring amorphous layer laid on the first coloring layer and containing electrochromic material.
Claim 2
Dependent Claim
64 words
An electrochromic display device comprising: a display electrode; a counter electrode spaced from the display electrode; an electrolyte filled in the space between the display electrode and the counter electrode; a first coloring crystalline layer formed on the display electrode, containing electrochromic material and having a specific pattern; and a second coloring amorphous layer laid on the first coloring layer and containing electrochromic material.
Claim 3
Dependent Claim
15 words
A device according to claim 1, wherein said first coloring layer is formed of cermet.
Claim 4
Dependent Claim
30 words
A device according to claim 2, wherein said cermet layer is formed of at least one metal selected from the group consisting of gold and platinum, besides the electrochromic material.
Claim 5
Dependent Claim
22 words
A device according to claim 1, wherein said first coloring layer is obtained by heating an electrochromic layer formed by vacuum deposition.
Claim 6
Dependent Claim
15 words
A device according to claim 1, wherein said first coloring layer is formed by sputtering.
Claim 7
Dependent Claim
16 words
A device according to claim 1, wherein said second coloring layer is formed by vacuum deposition.
Claim 8
Dependent Claim
23 words
A device according to claim 1, wherein the electrochromic material forming said first and second coloring layers is tungsten oxide or molybdenum oxide.
Claim 9
Dependent Claim
27 words
A device according to claim 1, wherein said first coloring layer consists of tungsten oxide and has a density ranging from 7.0 to 7.5 g/cm 3 .
Claim 10
Dependent Claim
27 words
A device according to claim 1, wherein said second coloring layer consists of tungsten oxide and has a density ranging from 5.5 to 6.5 g/cm 3 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |