US4129861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex addressing of electrochromic displays
Assignee: Wyeth Holdings LLC
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Filing: 1976-01-27
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Granted: 1978-12-12
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Expires: 1996-01-27
Abstract
Abstract An electrochromic data display and imaging device which may be formed by sandwich arrangement of the imaging area and the counter-electrode area with a suitable ion-conducting layer between. The imaging area is in the form of discrete electrochromic areas in a desired pattern, and a circuit is provided for multiplexing these areas to provide alphanumeric or other type displays.
Inventors
- 👤 Robert D. Giglia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:56
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G09G3/16; G09G3/19
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A display system comprising a plurality of persistent electrochromic display elements and means to multiplex said display elements, said means comprising diode means to provide a sufficient threshold voltage only to each display element to be displayed or erased and voltage threshold conduction means connected to each display element so that only a directly addressed element will be activated.
Claim 2
Dependent Claim
59 words
A display system comprising a plurality of persistent electrochromic display elements and means to multiplex said display elements, said means comprising diode means to provide a sufficient threshold voltage only to each display element to be displayed or erased and voltage threshold conduction means connected to each display element so that only a directly addressed element will be activated.
Claim 3
Dependent Claim
32 words
The device of claim 1 wherein said persistent electrochromic display elements comprise layered arrangements of a persistent electrochromic material and an ion-conducting medium in contact with a first electrode and a counter-electrode.
Claim 4
Dependent Claim
13 words
The device of claim 2 wherein said persistent electrochromic material is tungsten oxide.
Claim 5
Dependent Claim
17 words
The device of claim 2 wherein said ion-conducting medium is a mixture of sulfuric acid and glycerin.
Claim 6
Dependent Claim
11 words
The device of claim 2 wherein said counter-electrode comprises tungsten oxide.
Claim 7
Dependent Claim
27 words
A display means defined by claim 1 further comprising capacitor means in the supply circuit to each element in parallel with the opposed electrodes of the element.
References Cited (Backward Citations)
US2892968A
Cited
US3609747A
Cited
US3708220A
Cited
US3756693A
Cited
US3904924A
Cited
US4028692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |