Patent US4749260A successfully refreshed from Google Patents.
US4749260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable color transparent panels
Assignee: Rhode Island Department of Elementary and Secondary Education
•
Filing: 1986-05-01
•
Granted: 1988-06-07
•
Expires: 2006-05-01
Abstract
Abstract An electronic display device having a polyaniline film coated on a transparent electrode. The film has electrochromic properties and will display at least three distinct reproducible color changes.
Inventors
- 👤 Sze C. Yang
- 👤 Richard R. Durand, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:51
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525; G02F1/1516; G02F1/15165; G02F1/13; G02F1/133; G02F1/1333; G02F1/1347; G02F1/13471; G02F1/13473
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
A transparent color panel which comprises: first and second transparent electrodes spaced apart in facing relationship; a polymer formed from monomeric aniline coated on said second electrode and facing the first electrode; and an electrolyte disposed between the first and second electrodes; the polymer adapted to display at least three distinctive color changes in response to voltages applied to the electrodes which color changes are reproduceable.
Claim 2
Dependent Claim
66 words
A transparent color panel which comprises: first and second transparent electrodes spaced apart in facing relationship; a polymer formed from monomeric aniline coated on said second electrode and facing the first electrode; and an electrolyte disposed between the first and second electrodes; the polymer adapted to display at least three distinctive color changes in response to voltages applied to the electrodes which color changes are reproduceable.
Claim 3
Dependent Claim
31 words
The panel of claim 1 wherein the electrodes each comprise a transparent sheet having an electrolytic material disposed thereon said electrolytic material on the opposed facing surfaces of said transparent sheets.
Claim 4
Dependent Claim
34 words
The panel of claim 1 which includes a plurality of polymer layers formed in said panel each said layer sandwiched between two transparent electrodes adapted to change color in response to a voltage change.
Claim 5
Dependent Claim
10 words
The panel of claim 3 wherein said electrodes are transparent.
Claim 6
Dependent Claim
24 words
The panels of claims 1 or 3 wherein the electrodes are selected from the group consisting of tin oxide, indium oxide, gold and/or platinum.
Claim 7
Dependent Claim
30 words
The panel of claim 1 wherein the electrolyte is selected from the group consisting of trifluoroacetate, trifluoromethane sulfonate, trifluoroacetic acid, sodium trifluoroacetate, hydrochloric acid, potasium chloride and phthalate buffer solutions.
Claim 8
Dependent Claim
79 words
The panel of claim 1 wherein the polymer is formed by the polymerization of the monomers selected from the group consisting of: ##STR5## where R 1 -R 8 =any one of the following groups: --H, --(CH 2 ) n CH 3 (n=0 to 10), --OCH 3 , --OC 2 H 5 --Cl, --F, --Br, --I, --CN, --SO 3 H, ##STR6## (where m, n, l=0 to 5 and X=any of the above groups) that define R 1 -R 8 .
Claim 9
Dependent Claim
16 words
The panel of claim 1 wherein the polymer has absorption range between 400 to 800 nm.
Claim 10
Dependent Claim
22 words
The panel of claim 1 which includes: means to apply voltage changes to said polymer whereby the polymer displays different gray scales.
Claim 11
Independent Claim
88 words
A method for the transmission of color through a panel wherein the panel comprises first and second transparent electrodes and a polymer formed from monomeric analine is coated on one of said electrodes and an electrolyte is disposed between the first and second electrodes which includes; applying a voltage to the polymer the polymer changing to a first color; applying a second voltage to the polymer the polymer changing to a second color; and applying a third voltage to the polymer the polymer changing to a third color.
Claim 12
Independent Claim
88 words
A method for the transmission of color through a panel wherein the panel comprises first and second transparent electrodes and a polymer formed from monomeric analine is coated on one of said electrodes and an electrolyte is disposed between the first and second electrodes which includes; applying a voltage to the polymer the polymer changing to a first color; applying a second voltage to the polymer the polymer changing to a second color; and applying a third voltage to the polymer the polymer changing to a third color.
Claim 13
Dependent Claim
43 words
the method of claim 10 wherein the transparent display panel includes a plurality of layers of polymer each layer disposed between opposed electrodes and which includes: applying independently voltages to each of said layers to control the color of each of the polymers.
Claim 14
Dependent Claim
12 words
The panel of claim 1 wherein the electrolyte is a liquid electrolyte.
Claim 15
Dependent Claim
12 words
The panel of claim 1 wherein the electrolyte is a solid electrolyte.
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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |