EP0132068A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multi-colour display device and process of fabricating same
Assignee: Seiko Instruments Inc
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Filing: 1984-06-27
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Granted: —
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Expires: 2004-06-27
Abstract
Abstract A multi-colour display device comprises a first substrate (1), a second substrate (5) spaced from the first substrate (1), a display material (7) disposed between the first substrate (1) and the second substrate (5) and a plurality of display electrodes (2) provided on an inner surface of the first substrate (1). A counter electrode (4) is provided on an inner surface of the second substrate (5) and a plurality of different colour filters (3) are disposed on the display electrodes (2). The colour filters (3) contain electro-conductive particles whereby a drive voltage fed to the display electrodes (2) is applied via the colour filters (3) to the display material (7) substantially without voltage drop.
Inventors
- 👤 Mitsuru Suginoya
- 👤 Koji Iwasa
- 👤 Hitoshi Kamamori
- 👤 Yutaka Sano
- 👤 Yumiko Terada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 14:43
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: 8
Claim 1
Independent Claim
117 words
A multi-colour display device comprising: a first substrate (1); a second substrate (5) spaced apart from said first substrate (1); a display material (7) disposed between the first substrate (1) and the second substrate (5); a plurality of display electrodes (2) provided on an inner surface of said first substrate (1); a counter electrode (4) provided on an inner surface of said second substrate (5); and a plurality of different colour filters (3) disposed on said plurality of display electrodes (2) characterised in that the colour filters (3) contain electro-conductive particles whereby a drive voltage fed to said display electrodes (2) is applied via said colour filters (3) to said display material (7) substantially without voltage drop.
Claim 2
Dependent Claim
117 words
A multi-colour display device comprising: a first substrate (1); a second substrate (5) spaced apart from said first substrate (1); a display material (7) disposed between the first substrate (1) and the second substrate (5); a plurality of display electrodes (2) provided on an inner surface of said first substrate (1); a counter electrode (4) provided on an inner surface of said second substrate (5); and a plurality of different colour filters (3) disposed on said plurality of display electrodes (2) characterised in that the colour filters (3) contain electro-conductive particles whereby a drive voltage fed to said display electrodes (2) is applied via said colour filters (3) to said display material (7) substantially without voltage drop.
Claim 3
Dependent Claim
117 words
A process of fabricating a multi-colour display device characterised by comprising the steps of: forming a plurality of display electrodes (2) on a first substrate (1); selectively forming a colour filter (3) on each display electrode (2) by electrodepositing a polymer together with colouring matter and electro-conductive particles so that the display electrodes (2) have different colours; forming a counter electrode (4) on a surface of a second substrate (5); and disposing a display material (7) between said first substrate (1) and said second substrate (5), said display material (7) serving, in operation, as a light shutter controlled by the voltage applied between said colour filters (3) via said display electrode (2) and the counter electrode (4).
Claim 4
Dependent Claim
117 words
A process of fabricating a multi-colour display device characterised by comprising the steps of: forming a plurality of display electrodes (2) on a first substrate (1); selectively forming a colour filter (3) on each display electrode (2) by electrodepositing a polymer together with colouring matter and electro-conductive particles so that the display electrodes (2) have different colours; forming a counter electrode (4) on a surface of a second substrate (5); and disposing a display material (7) between said first substrate (1) and said second substrate (5), said display material (7) serving, in operation, as a light shutter controlled by the voltage applied between said colour filters (3) via said display electrode (2) and the counter electrode (4).
Claim 5
Dependent Claim
33 words
A process as claimed in claim 2 characterised in that said electro-conductive particles are any one or more of tin oxide, indium oxide, antimony oxide, zinc oxide, cadmium oxide, gold, silver and nickel.
Claim 6
Dependent Claim
30 words
A process as claimed in claim 2 or 3 characterised in that said polymer has an anionic deposition characteristic and is electrolytically deposited on said display electrodes by anodic electrolysis.
Claim 7
Dependent Claim
51 words
A process as claimed in claim 4 characterised in that said polymer is an acrylic resin containing carboxyl groups or a polyester resin containing carboxyl groups these 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 8
Dependent Claim
28 words
A process as claimed in any of claims 2 to 5 characterised in that said colouring matter is a dye which is barely soluble or insoluble in water.
References Cited (Backward Citations)
No citation records indexed.
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