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US5330803A
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Liquid crystal device
Assignee: Canon Inc
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Filing: 1992-08-06
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Granted: 1994-07-19
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Expires: 2012-08-06
Abstract
Abstract A liquid crystal device is constituted by a pair of substrates, at least one of which has an alignment film thereon, and a liquid crystal disposed between the substrates, The alignment film is formed of a resin including a first polyamide represented by formula (I) below and a second polyamide represented by formula (II) below: ##STR1## wherein R 1 -R 4 independently denote a group of CF 3 (CF 2 ) 1 (CH 2 ) m wherein l and m are integers satisfying 1≧0 and m ≧O; A 1 and A 2 are mutually different divalent organic residues; and n1 and n2 are integers satisfying n1≧2 and n2 ≧2.
Inventors
- 👤 Hideaki Takao
- 👤 Masanobu Asaoka
- 👤 Makoto Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:32
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133723; C; C09; C09K; C09K2323/00; C09K2323/02; C09K2323/025
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
106 words
A liquid crystal device, comprising: a pair of substrates, at least one of which has an alignment film thereon, and a liquid crystal disposed between the substrates; wherein said alignment film comprises a resin including a first polyamide represented by formula (I) below and a second polyamide represented by formula (II) below: ##STR15## wherein R 1 -R 4 independently denote a group of CF 3 (CF 2 ) 1 (CH 2 ) m wherein l and m are integers satisfying 1≧0 and m≧0; and A 1 l and A 2 are mutually different divalent organic residues; and n1 and n2 are integers satisfying n1≧2 and n2≧2.
Claim 2
Dependent Claim
106 words
A liquid crystal device, comprising: a pair of substrates, at least one of which has an alignment film thereon, and a liquid crystal disposed between the substrates; wherein said alignment film comprises a resin including a first polyamide represented by formula (I) below and a second polyamide represented by formula (II) below: ##STR15## wherein R 1 -R 4 independently denote a group of CF 3 (CF 2 ) 1 (CH 2 ) m wherein l and m are integers satisfying 1≧0 and m≧0; and A 1 l and A 2 are mutually different divalent organic residues; and n1 and n2 are integers satisfying n1≧2 and n2≧2.
Claim 3
Dependent Claim
22 words
A device according to claim 1, wherein at least one of A 1 and A 2 has a linear molecular chain structure.
Claim 4
Dependent Claim
16 words
A device according to claim 2, wherein said linear molecular chain structure is represented by ##STR16##
Claim 5
Dependent Claim
16 words
A device according to claim 1, wherein said liquid crystal is a chiral smectic liquid crystal.
Claim 6
Dependent Claim
24 words
A device according to claim 1, wherein A 1 has a linear molecular chain structure and A 2 has a non-linear molecular chain structure.
Claim 7
Dependent Claim
24 words
A device according to claim 5, wherein said linear molecular chain structure is represented by ##STR17## linear molecular chain structure is represented by ##STR18##
Claim 8
Dependent Claim
19 words
A device according to claim 1, wherein said alignment film comprises a blend of the first and second polyamides.
Claim 9
Dependent Claim
19 words
A device according to claim 1, wherein said alignment film comprises a copolymer of the first and second polyamides.
Claim 10
Dependent Claim
19 words
A device according to claim 1, wherein said alignment film comprises a laminate of the first and second polyamides.
Claim 11
Dependent Claim
18 words
A device according to claim 1, wherein said alignment film has a thickness of at most 200 Å.
Claim 12
Dependent Claim
18 words
A device according to claim 1, wherein said alignment film has a thickness of at most 100 Å.
Claim 13
Dependent Claim
16 words
A device according to claim 1, wherein said alignment film has been rubbed in one direction.
Claim 14
Dependent Claim
33 words
A device according to claim 1, wherein said alignment film is provided to both substrates, and the two alignment films have been rubbed in directions which are parallel and identical to each other.
Claim 15
Dependent Claim
40 words
A device according to claim 1, wherein said alignment film is provided to both substrates, and the two alignment films have been rubbed in directions which are almost identical but cross each other at an intersection angle of 2-20 degrees.
Claim 16
Dependent Claim
33 words
A device according to claim 1, wherein said alignment film is provided to both substrates, and the two alignment films have been rubbed in directions which are parallel and reverse to each other.
Claim 17
Dependent Claim
97 words
An electrode plate for a liquid crystal device, comprising: a substrate and an alignment film formed on the substrate; wherein said alignment film comprises a resin including a first polyamide represented by formula (I) below and a second polyamide represented by formula (II) below: ##STR19## wherein R 1 -R 4 independently denote a group of CF 3 (CF 2 ) l (CH 2 ) m wherein l and m are integers satisfying l≧0 and m ≧0; A 1 and A 2 are mutually different divalent organic residues; and n1 and n2 are integers satisfying n1≧2 and n2≧2.
Claim 18
Dependent Claim
97 words
An electrode plate for a liquid crystal device, comprising: a substrate and an alignment film formed on the substrate; wherein said alignment film comprises a resin including a first polyamide represented by formula (I) below and a second polyamide represented by formula (II) below: ##STR19## wherein R 1 -R 4 independently denote a group of CF 3 (CF 2 ) l (CH 2 ) m wherein l and m are integers satisfying l≧0 and m ≧0; A 1 and A 2 are mutually different divalent organic residues; and n1 and n2 are integers satisfying n1≧2 and n2≧2.
Claim 19
Dependent Claim
23 words
An electrode plate according to claim 16, wherein at least one of A 1 and A 2 has a linear molecular chain structure.
Claim 20
Dependent Claim
17 words
An electrode plate according to claim 17, wherein said linear molecular chain structure is represented by ##STR20##
Claim 21
Dependent Claim
17 words
An electrode plate according to claim 16, wherein said liquid crystal is a chiral smectic liquid crystal.
Claim 22
Dependent Claim
25 words
An electrode plate according to claim 16, wherein A 1 has a linear molecular chain structure and A 2 has a non-linear molecular chain structure.
Claim 23
Dependent Claim
27 words
An electrode plate according to claim 20, wherein said linear molecular chain structure is represented by ##STR21## and said non-linear molecular chain structure is represented by ##STR22##
Claim 24
Dependent Claim
20 words
An electrode plate according to claim 16, wherein said alignment film comprises a blend of the first and second polyamides.
Claim 25
Dependent Claim
20 words
An electrode plate according to claim 16, wherein said alignment film comprises a copolymer of the first and second polyamides.
Claim 26
Dependent Claim
20 words
An electrode plate according to claim 16, wherein said alignment film comprises a laminate of the first and second polyamides.
Claim 27
Dependent Claim
153 words
A liquid crystal apparatus, including: (a) a liquid crystal panel comprising a pair of substrates having thereon scanning electrodes and data electrodes, respectively, so as to form an electrode matrix, at least one of the substrates further having thereon an alignment film; and a liquid crystal disposed between the substrates; (b) drive means for applying a scanning signal to the scanning electrodes and applying data signals to the data electrodes in synchronism with the scanning signal; wherein said alignment film comprises a resin including a first polyamide represented by formula (I) below and a second polyamide represented by formula (II) below: ##STR23## wherein R 1 -R 4 independently denote a group of CF 3 (CF 2 ) l (CH 2 ) m wherein l and m are integers satisfying l≧0 and m≧0; A 1 and A 2 are mutually different divalent organic residues; and n1 and n2 are integers satisfying n1≧2 and n2≧2.
Claim 28
Dependent Claim
153 words
A liquid crystal apparatus, including: (a) a liquid crystal panel comprising a pair of substrates having thereon scanning electrodes and data electrodes, respectively, so as to form an electrode matrix, at least one of the substrates further having thereon an alignment film; and a liquid crystal disposed between the substrates; (b) drive means for applying a scanning signal to the scanning electrodes and applying data signals to the data electrodes in synchronism with the scanning signal; wherein said alignment film comprises a resin including a first polyamide represented by formula (I) below and a second polyamide represented by formula (II) below: ##STR23## wherein R 1 -R 4 independently denote a group of CF 3 (CF 2 ) l (CH 2 ) m wherein l and m are integers satisfying l≧0 and m≧0; A 1 and A 2 are mutually different divalent organic residues; and n1 and n2 are integers satisfying n1≧2 and n2≧2.
Claim 29
Dependent Claim
22 words
An apparatus according to claim 25, wherein at least one of A 1 and A 2 has a linear molecular chain structure.
Claim 30
Dependent Claim
16 words
An apparatus according to claim 26, wherein said linear molecular chain structure is represented by ##STR24##
Claim 31
Dependent Claim
16 words
An apparatus according to claim 25, wherein said liquid crystal is a chiral smectic liquid crystal.
Claim 32
Dependent Claim
24 words
An apparatus according to claim 25, wherein A 1 has a linear molecular chain structure and A 2 has a non-linear molecular chain structure.
Claim 33
Dependent Claim
26 words
An apparatus according to claim 29, wherein said linear molecular chain structure is represented by ##STR25## and said non-linear molecular chain structure is represented by ##STR26##
Claim 34
Dependent Claim
19 words
An apparatus according to claim 25, wherein said alignment film comprises a blend of the first and second polyamides.
Claim 35
Dependent Claim
19 words
An apparatus according to claim 25, wherein said alignment film comprises a copolymer of the first and second polyamides.
Claim 36
Dependent Claim
19 words
An apparatus according to claim 25, wherein said alignment film comprises a laminate of the first and second polyamides.
Claim 37
Dependent Claim
18 words
An apparatus according to claim 25, wherein said alignment film has a thickness of at most 200 Å.
Claim 38
Dependent Claim
18 words
An apparatus according to claim 25, wherein said alignment film has a thickness of at most 100 Å.
Claim 39
Dependent Claim
16 words
An apparatus according to claim 25, wherein said alignment film has been rubbed in one direction.
Claim 40
Dependent Claim
33 words
An apparatus according to claim 25, wherein said alignment film is provided to both substrates, and the two alignment films have been rubbed in directions which are parallel and identical to each other.
Claim 41
Dependent Claim
40 words
An apparatus according to claim 25, wherein said alignment film is provided to both substrates, and the two alignment films have been rubbed in directions which are almost identical but cross each other at an intersection angle of 2-20 degrees.
Claim 42
Dependent Claim
33 words
An apparatus according to claim 25, wherein said alignment film is provided to both substrates, and the two alignment films have been rubbed in directions which are parallel and reverse to each other.
References Cited (Backward Citations)
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