Patent US5374371A successfully refreshed from Google Patents.
US5374371A
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Liquid crystal device
Assignee: Kawamura Institute of Chemical Research
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Filing: 1993-07-29
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Granted: 1994-12-20
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Expires: 2013-07-29
Abstract
Abstract A liquid crystal device which comprises a pair of substrates having an electrode layer, at least one of said substrates being transparent, and a light-control layer supported between the substrate is disclosed, wherein said light-control layer comprises a continuous liquid crystal phase composed of a nematic liquid crystal material and a transparent solid substance having the three dimensional network existing in said continuous liquid crystal phase, said nematic liquid crystal material having an optical anisotropy ( DELTA n) ranging from 0.18 to 0.3 and a dielectric anisotropy ( DELTA epsilon ) ranging from 15 to 30. The device can be driven at a low voltage to provide a display of sufficient contrast and is applicable to a multiplexing drive system.
Inventors
- 👤 Kiyofumi Takeuchi
- 👤 Haruyoshi Takatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:54
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/02; C09K19/0208; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1334; C09K2323/00; G02F1/13345
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
89 words
A liquid crystal device which comprises a pair of substrates having an electrode layer, at least one of said substrates being transparent, and a light-control layer supported between the substrates, wherein said light-control layer comprises a continuous liquid crystal phase composed of a nematic liquid crystal material and a transparent solid substance having a three dimensional network existing in said continuous liquid crystal phase, said nematic liquid crystal material having an optical anisotropy (Δn) ranging from 0.18 to 0.3 and a dielectric anisotropy (Δε) ranging from 15 to 25.
Claim 2
Dependent Claim
89 words
A liquid crystal device which comprises a pair of substrates having an electrode layer, at least one of said substrates being transparent, and a light-control layer supported between the substrates, wherein said light-control layer comprises a continuous liquid crystal phase composed of a nematic liquid crystal material and a transparent solid substance having a three dimensional network existing in said continuous liquid crystal phase, said nematic liquid crystal material having an optical anisotropy (Δn) ranging from 0.18 to 0.3 and a dielectric anisotropy (Δε) ranging from 15 to 25.
Claim 3
Dependent Claim
31 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a nematic liquid crystal compound having an optical anisotropy (Δn) ranging from 0.19 to 0.4.
Claim 4
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR124## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 5
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR125## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 6
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (III): ##STR126## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 7
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (IV): ##STR127## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 8
Dependent Claim
59 words
A liquid crystal-device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (V): ##STR128## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 9
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (VI): ##STR129## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 10
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (VII): ##STR130## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 11
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (VIII): ##STR131## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 12
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (IX): ##STR132## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 13
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (X): ##STR133## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 14
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (XI): ##STR134## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 15
Dependent Claim
60 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (XII): ##STR135## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom.
Claim 16
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR136## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (IV): ##STR137## wherein R, X, and Y are as defined above.
Claim 17
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR138## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (V): ##STR139## wherein R, X, and Y are as defined above.
Claim 18
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR140## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VI): ##STR141## wherein R, X, and Y are as defined above.
Claim 19
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR142## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VII): ##STR143## wherein R, X, and Y are as defined above.
Claim 20
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR144## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VIII): ##STR145## wherein R, X, and Y are as defined above.
Claim 21
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR146## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (IX): ##STR147## wherein R, X, and Y are as defined above.
Claim 22
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR148## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (X): ##STR149## wherein R, X, and Y are as defined above.
Claim 23
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR150## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (XI): ##STR151## wherein R, X, and Y are as defined above.
Claim 24
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (I): ##STR152## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (XII): ##STR153## wherein R, X, and Y are as defined above.
Claim 25
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula II: ##STR154## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (IV): ##STR155## wherein R, X, and Y are as defined above.
Claim 26
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR156## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (V): ##STR157## wherein R, X, and Y are as defined above.
Claim 27
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR158## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VI): ##STR159## wherein R, X, and Y are as defined above.
Claim 28
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR160## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VII): ##STR161## wherein R, X, and Y are as defined above.
Claim 29
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR162## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VIII): ##STR163## wherein R, X, and Y are as defined above.
Claim 30
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR164## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (IX): ##STR165## wherein R, X, and Y are as defined above.
Claim 31
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR166## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (X): ##STR167## wherein R, X, and Y are as defined above.
Claim 32
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR168## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (XI): ##STR169## wherein R, X, and Y are as defined above.
Claim 33
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (II): ##STR170## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (XII): ##STR171## wherein R, X, and Y are as defined above.
Claim 34
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (III): ##STR172## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (IV): ##STR173## wherein R, X, and Y are as defined above.
Claim 35
Dependent Claim
77 words
A liquid crystal device a claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (III): ##STR174## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VII): ##STR175## wherein R, X, and Y are as defined above.
Claim 36
Dependent Claim
77 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material contains a compound represented by formula (III): ##STR176## wherein R represents a straight chain alkyl, alkoxyl or alkenyl group having from 1 to 10 carbon atoms; X represents a fluorine atom or a cyano group; and Y represents a hydrogen atom or a fluorine atom, and a compound represented by formula (VIII): ##STR177## wherein R, X, and Y are as defined above.
Claim 37
Dependent Claim
31 words
A liquid crystal device as claimed in claim 1, wherein said nematic liquid crystal material is present in an amount of at least 60% by weight based on the light-control layer.
Claim 38
Dependent Claim
18 words
A liquid crystal device as claimed in claim 1, wherein said transparent solid substance is a synthetic resin.
Claim 39
Dependent Claim
22 words
A liquid crystal device as claimed in claim 1, wherein said light-control layer has a thickness of from 5 to 30 μm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |