US4883344A
Expired / Lapsed
US
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Liquid crystal device having a modified polyvinyl alcohol alignment layer
Assignee: Canon Inc
•
Filing: 1989-01-24
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Granted: 1989-11-28
•
Expires: 2009-01-24
Abstract
Abstract A liquid crystal device comprises a pair of parallel substrates and a ferroelectric liquid crystal disposed between the substrates so as to have an arrangement of molecules forming a plurality of layers perpendicular to the faces of the substrates. At least one of the pair of substrates has an alignment control film formed of a modified polyvinyl alcohol resin having a function of aligning said plurality of layers preferentially in one direction. The modified polyvinyl alcohol resin film stably provides a uniform alignment state with a large tilt angle than a conventional alignment control film of polyimide or unmodified polyvinyl alcohol.
Inventors
- 👤 Shinjiro Okada
- 👤 Kazuo Yoshinaga
- 👤 Osamu Taniguchi
- 👤 Hideyuki Kawagishi
- 👤 Akira Tsuboyama
- 👤 Yukio Hanyu
- 👤 Masataka Yamashita
- 👤 Kazuharu Katagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:13
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133719; C; C09; C09K; C09K2323/00; C09K2323/02; C09K2323/023; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 68
Claim 1
Independent Claim
190 words
In a liquid crystal device, comprising: a pair of parallel substrates and a ferroelectric liquid crystal disposed between the substrates so as to have an arrangement of molecules forming a plurality of layers perpendicular to the faces of said pair of parallel substrates; the improvement wherein at least one of said pair of parallel substrates has an alignment control film formed of a modified polyvinyl alcohol resin containing a material selected from the group consisting of sulfur; boron; ##STR70## wherein R 12-1 and R 12-2 independently represent hydrogen, alkyl, aryl, alkyl having aryl, halogen, cyano or a residue derived from a heterocyclic ring; ##STR71## wherein R 13-1 is hydrogen or methyl and R 13-2 is hydrogen or C 1-4 alkyl; ##STR72## R 14-2 , wherein R 14-1 is hydrogen or methyl and R 14-2 is C 1-4 alkyl; and ##STR73## , wherein R 15-1 and R 15-2 are independently hydrogen, alkyl, aryl, allyl, lower alkyl having aryl, allyl, alkynyl or a saturated hydrocarbon group formed by cyclizing R 15-1 and R 15-2 , said modified polyvinyl alcohol having a function of aligning said plurality of layers preferentially in one direction.
Claim 2
Dependent Claim
190 words
In a liquid crystal device, comprising: a pair of parallel substrates and a ferroelectric liquid crystal disposed between the substrates so as to have an arrangement of molecules forming a plurality of layers perpendicular to the faces of said pair of parallel substrates; the improvement wherein at least one of said pair of parallel substrates has an alignment control film formed of a modified polyvinyl alcohol resin containing a material selected from the group consisting of sulfur; boron; ##STR70## wherein R 12-1 and R 12-2 independently represent hydrogen, alkyl, aryl, alkyl having aryl, halogen, cyano or a residue derived from a heterocyclic ring; ##STR71## wherein R 13-1 is hydrogen or methyl and R 13-2 is hydrogen or C 1-4 alkyl; ##STR72## R 14-2 , wherein R 14-1 is hydrogen or methyl and R 14-2 is C 1-4 alkyl; and ##STR73## , wherein R 15-1 and R 15-2 are independently hydrogen, alkyl, aryl, allyl, lower alkyl having aryl, allyl, alkynyl or a saturated hydrocarbon group formed by cyclizing R 15-1 and R 15-2 , said modified polyvinyl alcohol having a function of aligning said plurality of layers preferentially in one direction.
Claim 3
Dependent Claim
22 words
A liquid crystal device according to claim 1, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol resin containing sulfur.
Claim 4
Dependent Claim
31 words
A liquid crystal device according to claim 2, wherein said modified polyvinyl alcohol resin is a sulfur-containig polyvinyl alcohol obtained by the reaction of an alkylvinyl sulfoxide with a polyvinyl alcohol.
Claim 5
Dependent Claim
23 words
A liquid crystal device according to claim 3, wherein said modified polyvinyl alcohol is modified to a degree of 30 mol% or less.
Claim 6
Dependent Claim
25 words
A liquid crystal device according to claim 3, wherein said modified polyvinyl alcohol is modified to a degree of 1 to 20 mol% or less.
Claim 7
Dependent Claim
25 words
A liquid crystal device according to claim 3, wherein said modified polyvinyl alcohol is modified to a degree of 1 to 10 mol% or less.
Claim 8
Dependent Claim
21 words
A liquid crystal device according to claim 3, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 9
Dependent Claim
21 words
A liquid crystal device according to claim 3, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
Claim 10
Dependent Claim
56 words
A liquid crystal device according to claim 2, wherein said modified polyvinyl alcohol resin has a film of a modified polyvinyl alcohol containing structural units represented by the formula (9) below: ##STR74## (wherein R 9-1 is an alkyl group having 1 to 10 carbon atoms, an aryl group or a lower alkyl group having aryl group).
Claim 11
Dependent Claim
20 words
A liquid crystal device according to claim 9, wherein said modified polyvinyl alcohol is a modified polyvinyl resin containing sulfoxide.
Claim 12
Dependent Claim
23 words
A liquid crystal device according to claim 9, wherein said modified polyvinyl alcohol is modified to a degree of 30 mol% or less.
Claim 13
Dependent Claim
25 words
A liquid crystal device according to claim 9, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 20 mol% or less.
Claim 14
Dependent Claim
25 words
A liquid crystal device according to claim 9, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 10 mol% or less.
Claim 15
Dependent Claim
21 words
A liquid crystal device according to claim 9, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 16
Dependent Claim
21 words
A liquid crystal device according to claim 9, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
Claim 17
Dependent Claim
55 words
A liquid crystal device according to claim 2, wherein said modified polyvinyl alcohol resin has a film of a modified polyvinyl alcohol containing structural units represented by the formula (10) below: ##STR75## (wherein R 10-1 is an alkyl group having 1 to 10 carbon atoms, an aryl group or a lower alkyl having aryl group).
Claim 18
Dependent Claim
23 words
A liquid crystal device according to claim 16, wherein said modified polyvinyl alcohol is modified to a degree of 30 mol% or less.
Claim 19
Dependent Claim
25 words
A liquid crystal device according to claim 16, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 20 mol% or less.
Claim 20
Dependent Claim
25 words
A liquid crystal device according to claim 16, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 10 mol% or less.
Claim 21
Dependent Claim
21 words
A liquid crystal device according to claim 16, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 22
Dependent Claim
21 words
A liquid crystal device according to claim 16, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
Claim 23
Dependent Claim
66 words
A liquid crystal device according to claim 2, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol having a repeating unit represented by the formula (11) shown below and also having at least one --SR group at the terminal end (wherein R represents a hydrocarbon group or mono- or poly-hydroxy hydrocarbon group having 1 to 18 carbon atoms, and S represents sulfur atom): ##STR76##
Claim 24
Dependent Claim
23 words
A liquid crystal device according to claim 22, wherein said modified polyvinyl alcohol is modified to a degree of 30 mol% or less.
Claim 25
Dependent Claim
25 words
A liquid crystal device according to claim 22, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 20 mol% or less.
Claim 26
Dependent Claim
25 words
A liquid crystal device according to claim 22, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 10 mol% or less.
Claim 27
Dependent Claim
21 words
A liquid crystal device according to claim 22, wherein said modified polyvinyl alcohol has a polymerization degree of 10 to 10000.
Claim 28
Dependent Claim
21 words
A liquid crystal device according to claim 22, wherein said modified polyvinyl alcohol has a polymerization degree of 10 to 2000.
Claim 29
Dependent Claim
36 words
A liquid crystal device according to claim 22, wherein said modified polyvinyl alcohol has a polymerization degree of 10 to 200, and a ratio of weight-average polymerization degree to number-average polymerization degree of 2.0 to 3.0.
Claim 30
Dependent Claim
64 words
A liquid crystal device according to claim 1, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol containing structural units represented by the formula (12): ##STR77## (wherein R 12-1 and R 12-2 each represent hydrogen atom, an alkyl group, an aryl group, an alkyl group having aryl group, a halogen atom, a cyano group or a residue derived from a heterocyclic ring).
Claim 31
Dependent Claim
23 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is a modified polyvinyl alcohol resin containing an ethylenic site.
Claim 32
Dependent Claim
31 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is a modified polyvinyl alcohol resin containing an ethylenic site having an alkyl group in the side chain.
Claim 33
Dependent Claim
23 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is a modified polyvinyl alcohol resin containing a vinylhalide site.
Claim 34
Dependent Claim
31 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is a modified polyvinyl alcohol resin containing an ethylenic site having a residue derived from a heterocyclic ring.
Claim 35
Dependent Claim
21 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 36
Dependent Claim
21 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
Claim 37
Dependent Claim
23 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is modified to a degree of 50 mol% or less.
Claim 38
Dependent Claim
23 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 30 mol%.
Claim 39
Dependent Claim
23 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 20 mol%.
Claim 40
Dependent Claim
23 words
A liquid crystal device according to claim 29, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 10 mol%.
Claim 41
Dependent Claim
55 words
A liquid crystal device according to claim 1, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol containing structural units represented by the formula (13): ##STR78## (wherein R 13-1 represents a hydrogen atom or a methyl group, R 13-2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms).
Claim 42
Dependent Claim
20 words
A liquid crystal device according to claim 40, wherein said polyvinyl alcohol is a modified polyvinyl alcohol resin containing amide.
Claim 43
Dependent Claim
23 words
A liquid crystal device according to claim 40, wherein said modified polyvinyl alcohol is modified to a degree of 30 mol% or less.
Claim 44
Dependent Claim
23 words
A liquid crystal device according to claim 40, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 20 mol%.
Claim 45
Dependent Claim
23 words
A liquid crystal device according to claim 40, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 10 mol%.
Claim 46
Dependent Claim
21 words
A liquid crystal device according to claim 40, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 47
Dependent Claim
21 words
A liquid crystal device according to claim 40, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
Claim 48
Dependent Claim
51 words
A liquid crystal device according to claim 1, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol containing structural units represented by the formula (14): ##STR79## (wherein R 14-1 represents a hydrogen atom or a methyl group, R 14-2 represents an alkyl group having 1 to 4 carbon atoms).
Claim 49
Dependent Claim
21 words
A liquid crystal device according to claim 49, wherein said modified polyvinyl alcohol is a modified polyvinyl alcohol resin containing amide.
Claim 50
Dependent Claim
23 words
A liquid crystal device according to claim 47, wherein said modified polyvinyl alcohol is modified to a degree of 30 mol% or less.
Claim 51
Dependent Claim
25 words
A liquid crystal device according to claim 47, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 20 mol% or less.
Claim 52
Dependent Claim
25 words
A liquid crystal device according to claim 47, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 10 mol% or less.
Claim 53
Dependent Claim
21 words
A liquid crystal device according to claim 47, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 54
Dependent Claim
21 words
A liquid crystal device according to claim 47, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
Claim 55
Dependent Claim
74 words
A liquid crystal device according to claim 1, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol containing structural units represented by the formula (15): ##STR80## (wherein R 15-1 and R 15-2 each represent hydrogen atom, an alkyl group, an aryl group, a lower alkyl group having aryl group, an allyl group or an alkynyl group, or a cyclic saturated hydrocarbon group formed by cyclization of R 15-1 and R 15-2 ).
Claim 56
Dependent Claim
22 words
A liquid crystal device according to claim 54, wherein said modified polyvinyl alcohol is a modified polyvinyl alcohol resin containing 1,3-dioxane ring.
Claim 57
Dependent Claim
23 words
A liquid crystal device according to claim 54, wherein said modified polyvinyl alcohol is modified to a degree of 80 mol% or less.
Claim 58
Dependent Claim
25 words
A liquid crystal device according to claim 54, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 50 mol% or less.
Claim 59
Dependent Claim
25 words
A liquid crystal device according to claim 54, wherein said modified polyvinyl alcohol is modified to a degree of 0.05 to 20 mol% or less.
Claim 60
Dependent Claim
21 words
A liquid crystal device according to claim 54, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 61
Dependent Claim
21 words
A liquid crystal device according to claim 54, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
Claim 62
Dependent Claim
22 words
A liquid crystal device according to claim 1, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol resin containing boron.
Claim 63
Dependent Claim
29 words
A liquid crystal device according to claim 61, wherein said modified polyvinyl alcohol resin is a modified polyvinyl alcohol containing structural units represented by the following formula (16): ##STR81##
Claim 64
Dependent Claim
23 words
A liquid crystal device according to claim 62, wherein said modified polyvinyl alcohol is modified to a degree of 30 mol% or less.
Claim 65
Dependent Claim
25 words
A liquid crystal device according to claim 62, wherein said modified polyvinyl alcohol is modified to a degree of 1 to 20 mol% or less.
Claim 66
Dependent Claim
25 words
A liquid crystal device according to claim 62, wherein said modified polyvinyl alcohol is modified to a degree of 1 to 10 mol% or less.
Claim 67
Dependent Claim
21 words
A liquid crystal device according to claim 62, wherein said modified polyvinyl alcohol has a polymerization degree of 100 to 10000.
Claim 68
Dependent Claim
21 words
A liquid crystal device according to claim 62, wherein said modified polyvinyl alcohol has a polymerization degree of 500 to 2000.
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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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |