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Patent EP0219965A1 successfully refreshed from Google Patents.
EP0219965A1
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EP
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A ferroelectric liquid crystal electro-optical device
Assignee: Seiko Instruments Inc
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Filing: 1986-09-09
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Granted: —
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Expires: 2006-09-09
Abstract
Abstract A ferroelectric liquid crystal electro-optical device comprising: two opposed plates (1,2) having electrodes (3) on the inner surfaces thereof, the inner surface of one of the two plates having an uni-axial alignment characteristic (8) and the inner surface of the other plate having a random alignment characteristic; and ferroelectric liquid crystal material (4) sandwiched between said plates, the random alignment characteristic being provided on a layer (9) of water repellent material.
Inventors
- 👤 Takamasa Harada
- 👤 Masaaki Taguchi
- 👤 Sadashi Shimoda
- 👤 Kokichi Ito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/137; G02F1/139; G02F1/141; G02F1/1335; G02F1/13363; G02F1/133638
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A ferroelectric liquid crystal electro-optical device comprising: two opposed plates (1,2) having electrodes (3) on the inner surfaces thereof, the inner surface of one of said two plates having an uni-axial alignment characteristic (8) and the inner surface of the other plate having a random alignment characteristic; and ferro-electric liquid crystal material (4) sandwiched between said plates characterised in that the random alignment characteristic is provided on a layer (9) of water repellent material.
Claim 2
Dependent Claim
74 words
A ferroelectric liquid crystal electro-optical device comprising: two opposed plates (1,2) having electrodes (3) on the inner surfaces thereof, the inner surface of one of said two plates having an uni-axial alignment characteristic (8) and the inner surface of the other plate having a random alignment characteristic; and ferro-electric liquid crystal material (4) sandwiched between said plates characterised in that the random alignment characteristic is provided on a layer (9) of water repellent material.
Claim 3
Dependent Claim
30 words
A ferroelectric liquid crystal electro-optical device as claimed in claim 1 characterised in that said layer of water repellent material has a contact angle of at least 60 °water droplets.
Claim 4
Dependent Claim
21 words
A ferroelectric liquid crystal electro-optical device as claimed in claim 2 characterised in that said contact angle is at least 80°.
Claim 5
Dependent Claim
25 words
A ferroelectric liquid crystal electro-optical device as claimed in any preceding claim characterised in that said water repellent material is an A-B type block polymer.
Claim 6
Dependent Claim
39 words
A ferroelectric liquid crystal electro-optical device as claimed in claim 4 characterised in that said A-B type block polymer has a functional segment providing water repellency and a compatible segment which is compatible with a resin of said layer.
Claim 7
Dependent Claim
22 words
A ferroelectric liquid crystal electro-optical device as claimed in claim 5 characterised in that said functional segment is a fluorinated alkyl group.
Claim 8
Dependent Claim
30 words
A ferroelectric liquid crystal electro-optical device as claimed in claim 5 or 6 characterised in that said resin is an acrylic resin and said compatible segment is an acrylic polymer.
Claim 9
Dependent Claim
53 words
A ferroelectric liquid crystal electro-optical device as claimed in any preceding claim characterised in that said uni-axial alignment characteristic is obtained by rubbing or obliquely evaporating a thin layer made of at least one of polyimide, polyvinyl alcohol, fluorine-containing polymer, silane, SiO₂ and MgF₂ provided on the inner surface of said one plate.
References Cited (Backward Citations)
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