US4639088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-color display device and process of fabricating same
Assignee: Seiko Instruments Inc
•
Filing: 1984-07-19
•
Granted: 1987-01-27
•
Expires: 2004-07-19
Abstract
Abstract A liquid crystal display having a multi-color display is fabricated with a plurality of display electrodes on a first substrate, on which a color filter is selectively formed by electro-depositing a polymer together with coloring matter and electroconductive particles so that the display electrodes have different colors and electroconductivity. A counter electrode is formed on a second substrate and a liquid crystal material is sandwiched between the first and second substrates, so that the material serves, in operation, as a light shutter controlled by the voltage applied between said color filter via said display electrodes and the counter electrode.
Inventors
- 👤 Mitsuru Suginoya
- 👤 Koji Iwasa
- 👤 Hitoshi Kamamori
- 👤 Yutaka Sano
- 👤 Yumiko Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:24
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/15; G02F1/153; G02F1/1533; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
103 words
A process of fabricating a multi-color display device comprising the steps of: forming a plurality of display electrodes on a first substrate, selectively forming a color filter on each display electrode by electrodepositing a polymer together with coloring matter and electroconductive particles so that the display electrodes have different colors and electroconductivity, forming a counter electrode on a surface of a second substrate, and sandwiching a display material between said first substrate and said second substrate, said display material serving, in operation, as a light shutter controlled by the voltage applied between said color filter via said display electrodes and the counter electrode.
Claim 2
Dependent Claim
103 words
A process of fabricating a multi-color display device comprising the steps of: forming a plurality of display electrodes on a first substrate, selectively forming a color filter on each display electrode by electrodepositing a polymer together with coloring matter and electroconductive particles so that the display electrodes have different colors and electroconductivity, forming a counter electrode on a surface of a second substrate, and sandwiching a display material between said first substrate and said second substrate, said display material serving, in operation, as a light shutter controlled by the voltage applied between said color filter via said display electrodes and the counter electrode.
Claim 3
Dependent Claim
43 words
A process of fabricating a multicolor display device as set forth in claim 1, wherein said electroconductive particles are made of a substance selected from the group consisting of tin oxide, indium oxide, antimony oxide, zinc oxide, cadmium oxide, gold, silver and nickel.
Claim 4
Dependent Claim
33 words
A process of fabricating a multicolor display device as set forth in claim 1, wherein said polymer has an anionic deposition characteristic and is electrolytically deposited on said display electrodes by anodic electrolysis.
Claim 5
Dependent Claim
63 words
A process of fabricating a multicolor display device as set forth in claim 3, wherein said polymer having an anionic deposition characteristic is made of an acrylic resin containing carboxyl group or a polyester resin containing carboxyl group these being neutralized by alkali and made water-soluble or made of a mixture of water-soluble melamine resin and said acrylic resin or said polyester resin.
Claim 6
Dependent Claim
28 words
A process of fabricating multi-color display device as set forth in claim 1, wherein said coloring matter comprises a dye which is barely soluble or insoluble in water.
Claim 7
Dependent Claim
24 words
A process of fabricating multi-color display device as set forth in claim 5 wherein said dye is a dispersion dye or an oil-soluble dye.
Claim 8
Dependent Claim
30 words
A process of fabricating multicolor display device as set forth in claim 6, wherein said oil-soluble dye has a metal complex salt structure and is soluble in a hydrophilic solvent.
Claim 9
Dependent Claim
11 words
A multi-color display device fabricated by the method of claim 1.
Claim 10
Dependent Claim
80 words
A process of fabricating a multi-color display device comprising the steps of: forming a plurality of display electrodes on a first substrate; forming electrically conductive color filters of different colors on different respective groups of the display electrodes by electrodeposition from a solution containing polymer, coloring matter and electroconductive particles; forming a counter electrode on a surface of a second substrate; and sandwiching an electrooptic display material between the display and counter electrodes formed on the first and second substrates.
Claim 11
Dependent Claim
80 words
A process of fabricating a multi-color display device comprising the steps of: forming a plurality of display electrodes on a first substrate; forming electrically conductive color filters of different colors on different respective groups of the display electrodes by electrodeposition from a solution containing polymer, coloring matter and electroconductive particles; forming a counter electrode on a surface of a second substrate; and sandwiching an electrooptic display material between the display and counter electrodes formed on the first and second substrates.
Claim 12
Dependent Claim
35 words
A process according to claim 9; wherein said electroconductive particles are made of a substance selected from the group consisting of tin oxide, indium oxide, antimony oxide, zinc oxide, cadmium oxide, gold, silver and nickel.
Claim 13
Dependent Claim
25 words
A process according to claim 9; wherein said polymer has an anionic deposition characteristic and is electrolytically deposited on said display electrodes by anodic electolysis.
Claim 14
Dependent Claim
55 words
A process according to claim 11; wherein said polymer having an anionic deposition characteristic is made of an acrylic resin containing carboxyl group or a polyester resin containing carboxyl group these being neutralized by alkali and made water-soluble or made of a mixture of water-soluble melamine resin and said acrylic resin or said polyester resin.
Claim 15
Dependent Claim
21 words
A process according to claim 9; wherein said coloring matter comprises a dye which is barely soluble or insoluble in water.
Claim 16
Dependent Claim
17 words
A process according to claim 13; wherein said dye is a dispersion dye or an oil-soluble dye.
Claim 17
Dependent Claim
23 words
A process according to claim 14; wherein said oil-soluble dye has a metal complex salt structure and is soluble in a hydrophilic solvent.
Claim 18
Dependent Claim
12 words
A multi-color display device fabricated according to the process of claim 9.
References Cited (Backward Citations)
JPS5846325A
Cited
US4494824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |