US4879144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal element
Assignee: Canon Inc
•
Filing: 1989-04-06
•
Granted: 1989-11-07
•
Expires: 2009-04-06
Abstract
Abstract A liquid crystal element comprises a cell structure where a liquid crystal is disposed between a pair of electrode substrates, a first electrode substrate of said pair of electrode substrates having a first resin layer formed at the surface contacting the liquid crystal of the first electrode substrate by thermal curing resulted from dehydration ring closure, the first resin layer being able to control orientation of the liquid crystal, and a second electrode substrate having a second resin layer formed at the surface contacting the liquid crystal of the second electrode substrate by thermal curing at a temperature lower than that at which the first resin layer is formed, the second resin layer being able to control orientation of the liquid crystal.
Inventors
- 👤 Yoshiyuki Nakura
- 👤 Yasuo Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:52
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; C; C09; C09K; C09K19/00; C09K19/02; C09K19/0208; C09K2323/00; C09K2323/02; C09K2323/025; C09K2323/027
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
103 words
A liquid crystal element, comprising: a pair of transparent substrates including a first substrate having disposed thereon a transparent electrode and an orientation controlling film and a second transparent substrate having disposed thereon a transparent electrode and an orientation controlling film: a ferroelectric liquid crystal disposed between the pair of substrates, wherein at least one of the first or second substrates further comprises a color filter having a protecting layer which prevents the color filter from directly contacting the ferroelectric liquid crystal, said orientation controlling films comprising materials which are independently selected from the group consisting of polymides, polyvinyl alcohols and polyether amides.
Claim 2
Dependent Claim
103 words
A liquid crystal element, comprising: a pair of transparent substrates including a first substrate having disposed thereon a transparent electrode and an orientation controlling film and a second transparent substrate having disposed thereon a transparent electrode and an orientation controlling film: a ferroelectric liquid crystal disposed between the pair of substrates, wherein at least one of the first or second substrates further comprises a color filter having a protecting layer which prevents the color filter from directly contacting the ferroelectric liquid crystal, said orientation controlling films comprising materials which are independently selected from the group consisting of polymides, polyvinyl alcohols and polyether amides.
Claim 3
Dependent Claim
19 words
The liquid crystal element according to claim 1 in which the ferroelectric liquid crystal is a chiral smectic phase.
Claim 4
Dependent Claim
22 words
The liquid crystal element according to claim 1 in which the ferroelectric liquid crystal is a chiral smectic phase of non-spiral structure.
Claim 5
Dependent Claim
17 words
The liquid crystal element according to claim 1 in which the protecting layer comprises a resin layer.
Claim 6
Dependent Claim
43 words
The liquid crystal element according to claim 1 in which the protecting layer is disposed at a position where the protecting layer directly contacts the ferroelectric liquid crystal and comprises a resin film capable of controlling the orientation of the ferroelectric liquid crystal.
Claim 7
Dependent Claim
17 words
The liquid crystal element according to claim 1 in which the protecting layer is 600-2000 Å thick.
Claim 8
Dependent Claim
49 words
A liquid crystal element according to claim 1, wherein said protecting layer on one of the pair of the substrates serves as an orientation controlling film and is composed of a polyvinyl alcohol, and the other substrate is provided with an orientation controlling film thereon composed of a polyimide.
Claim 9
Dependent Claim
25 words
The liquid crystal element according to claim 7 in which the polyvinyl alcohol film is a film cured in the presence of a cross-linking agent.
Claim 10
Dependent Claim
18 words
The liquid crystal element according to claim 8 in which the cross-linking agent is an organic titanium compound.
Claim 11
Dependent Claim
24 words
The liquid crystal element according to claim 7 in which the orientation treating axes of the orientation controlling films are parallel to each other.
Claim 12
Dependent Claim
21 words
The liquid crystal element according to claim 10 in which each of the orientation treating axes is a rubbing treating axis.
Claim 13
Dependent Claim
49 words
A liquid crystal element according to claim 1, wherein said protecting layer on one of the pair of the substrates serves as an orientation controlling film and is composed of a polyether amide, and the other substrate is provided with an orientation controlling film thereon composed of a polyimide.
Claim 14
Dependent Claim
70 words
A liquid crystal element according to claim 12, wherein said orientation controlling film composed of a polyether amide has a recurring unit of the formula: ##STR4## where R 1 , R 2 , R 3 and R 4 are selected from the group consisting of hydrogen, straight or branched chain lower alkyl, lower alkoxy and halogen, R 5 and R 6 are hydrogen or lower alkyl, and Ar is arylene.
Claim 15
Dependent Claim
25 words
A liquid crystal element according to claim 12, wherein said orientation controlling film composed of a polyimide has a recurring unit of the formula: ##STR5##
Claim 16
Dependent Claim
25 words
A liquid crystal element according to claim 12, wherein said orientation controlling film composed of a polyimide has a recurring unit of the formula: ##STR6##
References Cited (Backward Citations)
GB1490110A
Cited
US4068923A
Cited
JPS5625714A
Cited
US4367924A
Cited
US4456638A
Cited
GB2111285A
Cited
US4561725A
Cited
US4615919A
Cited
US4729637A
Cited
US4618514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |