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US5129727A
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Liquid crystal device having the orientation control films which comprise a fluorine-containing aliphatic or alicyclic polyimide and display apparatus
Assignee: Canon Inc
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Filing: 1991-03-28
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Granted: 1992-07-14
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Expires: 2011-03-28
Abstract
Abstract A ferroelectric liquid crystal device and apparatus having a pair of substrates with orientation control films of a fluorine-containing aliphatic polyimide or a fluorine-containing alicyclic polyimide. The fluorine-containing aliphatic polyimide or alicyclic polyimide has a structural unit expressed by the following general formula [I]: <CHEM> wherein R1 is a tetravalent organic residue and R2 is a divalent organic residue, at least one of R1 and R2 being an alicyclic or aliphatic organic residue containing fluorine and n is 0 or 1. <IMAGE>
Inventors
- 👤 Yukio Hanyu
- 👤 Masanobu Asaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:23
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1039; C09; C09K; C09K19/00; C09K19/02; C09K19/0225; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133723; C09K2323/00; C09K2323/02; C09K2323/027; C09K2323/0271
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
53 words
A liquid crystal device, comprising: a pair of substrates and a pair of orientation control films disposed on said substrates, said liquid crystal device further comprising a ferroelectric liquid crystal layer disposed between said pair of orientation control films, wherein both of said orientation control films comprise a fluorine-containing aliphatic or alicyclic polyimide.
Claim 2
Dependent Claim
53 words
A liquid crystal device, comprising: a pair of substrates and a pair of orientation control films disposed on said substrates, said liquid crystal device further comprising a ferroelectric liquid crystal layer disposed between said pair of orientation control films, wherein both of said orientation control films comprise a fluorine-containing aliphatic or alicyclic polyimide.
Claim 3
Dependent Claim
67 words
A liquid crystal device according to claim 1, wherein said fluorine-containing aliphatic or alicyclic polyimide has a structural unit expressed by the following general formula [I]: ##STR20## wherein R 1 is a tetravalent organic residue and R 2 is a divalent organic residue, at least one of R 1 and R 2 includes an alicyclic or aliphatic organic residue having fluorine and n is 0 or 1.
Claim 4
Dependent Claim
41 words
A liquid crystal device according to claim 1, wherein said fluorine-containing aliphatic polyimide has a structural unit expressed by the following formula [Ia]: ##STR21## wherein R 3 is an aliphatic group and R 4 is an aromatic is 0 or 1.
Claim 5
Dependent Claim
16 words
A liquid crystal device according to claim 3, wherein R 3 is a fluorine-containing aliphatic group.
Claim 6
Dependent Claim
16 words
A liquid crystal device according to claim 3, wherein R 4 is a fluorine-containing aromatic group.
Claim 7
Dependent Claim
56 words
A liquid crystal device according to claim 2, wherein said fluorine-containing aliphatic polyimide has a structural unit expressed by the following formula [Ib]: ##STR22## ##STR23## wherein R 5 is an aromatic group and R 6 is an aliphatic group, at least one of R 5 and R 6 containing fluorine and n is 0 or 1.
Claim 8
Dependent Claim
16 words
A liquid crystal device according to claim 6, wherein R 5 is a fluorine-containing aromatic group.
Claim 9
Dependent Claim
16 words
A liquid crystal device according to claim 6, wherein R 6 is a fluorine-containing aliphatic group.
Claim 10
Dependent Claim
54 words
A liquid crystal device according to claim 2, wherein said fluorine-containing alicyclic polyimide has a structural unit expressed by the following formula [Ic]: ##STR24## wherein R 7 is an aromatic group and R 8 is an alicycle, at least one of R 7 and R 8 containing fluorine and n is 0 or 1.
Claim 11
Dependent Claim
17 words
A liquid crystal device according to claim 9, wherein R 7 is a fluorine containing aromatic group.
Claim 12
Dependent Claim
15 words
A liquid crystal device according to claim 9, wherein R 8 is a fluorine-containing alicycle.
Claim 13
Dependent Claim
54 words
A liquid crystal device according to claim 2, wherein said fluorine-containing alicyclic polyimide contains a structural unit expressed by the following formula [Id]: ##STR25## wherein R 9 is an alicycle and R 10 is an aromatic group, at least one of R 9 and R 10 containing fluorine and n is 0 or 1.
Claim 14
Dependent Claim
15 words
A liquid crystal device according to claim 12, wherein R 9 is a fluorine-containing alicycle.
Claim 15
Dependent Claim
16 words
A liquid crystal device according to claim 12, wherein R 10 is a fluorine-containing aromatic group.
Claim 16
Dependent Claim
50 words
A liquid crystal device according to claim 2, wherein said fluorine-containing aliphatic polyimide contains a structural unit expressed by the following formula [Ie]: ##STR26## wherein R 11 and R 12 are aliphatic groups, at least one of R 11 and R 12 containing fluorine and n is 0 or 1.
Claim 17
Dependent Claim
16 words
A liquid crystal device according to claim 15, wherein R 11 is a fluorine-containing aliphatic group.
Claim 18
Dependent Claim
16 words
A liquid crystal device according to claim 15, wherein R 12 is a fluorine-containing aliphatic group.
Claim 19
Dependent Claim
54 words
A liquid crystal device according to claim 2, wherein said fluorine-containing aliphatic polyimide contains a structural unit expressed by the following formula [Ie]: ##STR27## wherein R 13 is an aliphatic group, and R 14 is an alicycle, at least one of R 13 and R 14 containing fluorine and n is 0 or 1.
Claim 20
Dependent Claim
16 words
A liquid crystal device according to claim 18, wherein R 13 is a fluorine-containing aliphatic group.
Claim 21
Dependent Claim
15 words
A liquid crystal device according to claim 18, wherein R 14 is a fluorine-containing alicycle.
Claim 22
Dependent Claim
54 words
A liquid crystal device according to claim 2, wherein said fluorine-containing aliphatic polyimide contains a structural unit expressed by the following formula [Ig]: ##STR28## wherein R 15 is an alicycle, and R 16 is an aliphatic group, at least one of R 13 and R 14 containing fluorine and n is 0 or 1.
Claim 23
Dependent Claim
15 words
A liquid crystal device according to claim 21, wherein R 15 is a fluorine-containing alicycle.
Claim 24
Dependent Claim
16 words
A liquid crystal device according to claim 21, wherein R 16 is a fluorine-containing aliphatic group.
Claim 25
Dependent Claim
18 words
A liquid crystal device according to claim 1, wherein said orientation control film has a uni-axial orientation axis.
Claim 26
Dependent Claim
20 words
A liquid crystal device according to claim 24, wherein said uni-axial orientation axis has been realized by a rubbing treatment.
Claim 27
Dependent Claim
23 words
A liquid crystal device according to claim 1, wherein said orientation control film has a thickness ranging from 30 Å to 1 μ.
Claim 28
Dependent Claim
23 words
A liquid crystal device according to claim 1, wherein said orientation control film has a thickness ranging from 200 Å to 300 Å.
Claim 29
Dependent Claim
95 words
A display apparatus, comprising: a liquid crystal device comprising a pair of substrates and a pair of orientation control films disposed on said substrates, said liquid crystal device further comprising a ferroelectric liquid crystal layer disposed between said pair of orientation control films, wherein both of said orientation control films comprise a fluorine-containing aliphatic or alicyclic polyimide; said liquid crystal device further comprising operatively connected means including: a clock generator means; a scanning electrode selector means; a scanning electrode driver means; a data generator means; a data modulator means; and a signal electrode driver means.
Claim 30
Dependent Claim
95 words
A display apparatus, comprising: a liquid crystal device comprising a pair of substrates and a pair of orientation control films disposed on said substrates, said liquid crystal device further comprising a ferroelectric liquid crystal layer disposed between said pair of orientation control films, wherein both of said orientation control films comprise a fluorine-containing aliphatic or alicyclic polyimide; said liquid crystal device further comprising operatively connected means including: a clock generator means; a scanning electrode selector means; a scanning electrode driver means; a data generator means; a data modulator means; and a signal electrode driver means.
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) | 1995-07-14 | 1996-01-13 | 1996-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-14 | 2000-01-13 | 2000-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-14 | 2004-01-13 | 2004-07-14 | $7700.00 | Window Closed / Lapsed |