US4067644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic display device with a contrast-enhancing adjuvant and method of producing the same
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1976-04-02
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Granted: 1978-01-10
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Expires: 1996-04-02
Abstract
Abstract An improved electrochromic display device and a method of manufacturing it are disclosed. The improved device includes at least one layer of light absorbing and/or light reflecting fabric as a contrast enhancing adjuvant in the electrolyte of the device. According to the method of the invention a transparent support, at least one layer of fabric and a counter-electrode are assembled in laminated form and sealed together by an adhesive applied at the edges of the assembled structure.
Inventors
- 👤 Jiri Dlouhy
- 👤 Hans-Rudolf Zeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/1533
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
In an electrochromic display device of laminated construction including a liquid electrolyte, a solid electrochromic layer and means acting as a contrast enhancing adjuvant, the improvement comprising: a. fabric means in the electrolyte for acting as a contrast enhancing adjuvant, b. the fabric means comprising layers of a fabric with a mesh aperture of approx. 100 μ, c. the layers comprising at least one layer incorporating a dye or being provided with a layer of electrolyte-resistant metal, d. the layer incorporating a dye being of an electrically insulating material or being positioned on one side of a layer of a transparent and electrically insulating fabric and e. the layer being provided with a layer of electrolyte-resistant metal comprising an electrically insulating layer disposed on the surface of the metal or being positioned on one side of a layer of a transparent and electrically insulating fabric and f. the electrolyte being free of pigments.
Claim 2
Dependent Claim
153 words
In an electrochromic display device of laminated construction including a liquid electrolyte, a solid electrochromic layer and means acting as a contrast enhancing adjuvant, the improvement comprising: a. fabric means in the electrolyte for acting as a contrast enhancing adjuvant, b. the fabric means comprising layers of a fabric with a mesh aperture of approx. 100 μ, c. the layers comprising at least one layer incorporating a dye or being provided with a layer of electrolyte-resistant metal, d. the layer incorporating a dye being of an electrically insulating material or being positioned on one side of a layer of a transparent and electrically insulating fabric and e. the layer being provided with a layer of electrolyte-resistant metal comprising an electrically insulating layer disposed on the surface of the metal or being positioned on one side of a layer of a transparent and electrically insulating fabric and f. the electrolyte being free of pigments.
Claim 3
Dependent Claim
31 words
A display device as in claim 1 wherein the layer of electrolyte-resistant metal consists of gold and the electrically insulating layer disposed on the gold consists of silicon or aluminum oxide.
Claim 4
Dependent Claim
32 words
A display device as in claim 1 wherein the layer of fabric incorporating a dye or being provided with a layer of electrolyte-resistant metal consists of nylon, polytetrafluoro ethylene, glass-fibre or carbon-fibre.
References Cited (Backward Citations)
US3453038A
Cited
US3944333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |