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US4472027A
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US
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Method for the orientation of liquid crystal and liquid crystal display device
Assignee: Canon Inc
•
Filing: 1981-12-14
•
Granted: 1984-09-18
•
Expires: 2001-12-14
Abstract
Abstract A method for orienting a liquid crystal comprises bringing a liquid crystal into contact with a heat treated surface of an electrode substrate provided with a film formed by coating a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue, the heat treatment being effected under vacuum or under the conditions that the heating temperature and the treating time are within the region of a triangle having the vertexes at (1.75, 0), (2.5, 0) and (1.75, 3.7) in a coordinate with 1000 x (x being the reciprocal of absolute temperature) on the abscissa and ln k' on the ordinate where k' is the ratio of 300 min. to the treating time (min.). Liquid crystal display devices utilize the electrode substrate thus treated.
Inventors
- 👤 Yukitoshi Okubo
- 👤 Yoshiyuki Osada
- 👤 Masao Sugata
- 👤 Takashi Nakagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:16
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133719; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 83
Claim 1
Independent Claim
118 words
A method for orienting a liquid crystal which comprises bringing a liquid crystal into contact with a heat treated surface of an electrode substrate having a thin film transistor array, provided with a film formed by coating a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hrydrocarbon residue, the heat treatment being effected under the conditions that the heating temperature and the treating time are within the region of a triangle having the vertexes at (1.75, 0), (2.36, 0) and (1.75, 3.15) in a coordinate with 1000x (x reciprocal of absolute temperature on the abscissa and ln k' on the ordinate where k' is the ratio of 300 min. to the treating time(min.).
Claim 2
Independent Claim
118 words
A method for orienting a liquid crystal which comprises bringing a liquid crystal into contact with a heat treated surface of an electrode substrate having a thin film transistor array, provided with a film formed by coating a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hrydrocarbon residue, the heat treatment being effected under the conditions that the heating temperature and the treating time are within the region of a triangle having the vertexes at (1.75, 0), (2.36, 0) and (1.75, 3.15) in a coordinate with 1000x (x reciprocal of absolute temperature on the abscissa and ln k' on the ordinate where k' is the ratio of 300 min. to the treating time(min.).
Claim 3
Dependent Claim
16 words
A method according to claim 1 in which the liquid crystal is a nematic liquid crystal.
Claim 4
Dependent Claim
21 words
A method according to claim 2 in which the liquid crystal is a nematic liquid crystal of a negative dielectric anisotropy.
Claim 5
Dependent Claim
18 words
A method according to claim 1 in which the liquid crystal is oriented perpendicular to the electrode substrate.
Claim 6
Dependent Claim
34 words
A method according to claim 1 in which the silane compound is that of the formula (1) below: CF.sub.3 (CF.sub.2).sub.n --Si(OR).sub.3 ( 1) where R is alkyl and n is an integer of 1-20.
Claim 7
Dependent Claim
13 words
A method according to claim 5 in which R is methyl or ethyl.
Claim 8
Dependent Claim
14 words
A method according to claim 5 in which n is an integer of 3-7.
Claim 9
Dependent Claim
66 words
A method according to claim 1 in which the silane compound is at least one member selected from the group consisting of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 10
Dependent Claim
59 words
A method according to claim 8 in which the silane compound is a mixture of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 11
Dependent Claim
23 words
A method according to claim 1 in which the substrate is provided with a thin film transistor array of an amorphous silicon semiconductor.
Claim 12
Dependent Claim
17 words
A method according to claim 1 in which the heat treated surface is rubbed to one direction.
Claim 13
Dependent Claim
115 words
A liquid crystal display device which comprises a liquid crystal sandwiched between an electrode substrate having a thin film transistor array, provided with a film formed by coating a silane compound having alkoxy and an organic residue having at least a flourine-substituted hydrocarbon residue and heat-treated under the conditions that the heating temperature and the treating time are within the region of a triangle having the vertexes at (1.75, 0), (2.36, 0) and (1.75, 3.15) in a coordinate with 1000x (x: reciprocal of absolute temperature) on the abscissa and ln k' on the ordinate where k' is the ratio of 300 min. to the treating time(min.), and a counter substrate provided with a counter electrode.
Claim 14
Dependent Claim
115 words
A liquid crystal display device which comprises a liquid crystal sandwiched between an electrode substrate having a thin film transistor array, provided with a film formed by coating a silane compound having alkoxy and an organic residue having at least a flourine-substituted hydrocarbon residue and heat-treated under the conditions that the heating temperature and the treating time are within the region of a triangle having the vertexes at (1.75, 0), (2.36, 0) and (1.75, 3.15) in a coordinate with 1000x (x: reciprocal of absolute temperature) on the abscissa and ln k' on the ordinate where k' is the ratio of 300 min. to the treating time(min.), and a counter substrate provided with a counter electrode.
Claim 15
Dependent Claim
21 words
A device according to claim 12 in which the liquid crystal is a nematic liquid crystal of a negative dielectric anisotropy.
Claim 16
Dependent Claim
22 words
A device according to claim 12 in which the liquid crystal is a nematic liquid crystal composition of a negative dielectric anisotropy.
Claim 17
Dependent Claim
16 words
A device according to claim 12 in which the liquid crystal is in a homeotropic alignment.
Claim 18
Dependent Claim
34 words
A device according to claim 12 in which the silane compound is that of the formula (1) below: CF.sub.3 (CF.sub.2).sub.n --Si--(OR).sub.3 ( 1) where R is alkyl and n is an integer of 1-20.
Claim 19
Dependent Claim
13 words
A device according to claim 16 in which R is methyl or ethyl.
Claim 20
Dependent Claim
14 words
A device according to claim 16 in which n is an integer of 3-7.
Claim 21
Dependent Claim
66 words
A device according to claim 12 in which the silane compound is at least one member selected from the group consisting of CF 3 (CF 2 ) 3 --Si(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 22
Dependent Claim
59 words
A device according to claim 12 in which the silane compound is a mixture of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 23
Dependent Claim
26 words
A device according to claim 12 in which one of the electrode substrares is provided with a thin film transistor array of an amorphous silicon semiconductor.
Claim 24
Dependent Claim
21 words
A device according to claim 12 in which the liquid crystal is in a homeotropic alignment with a uniform tilting direction.
Claim 25
Dependent Claim
29 words
A device according to claim 21 in which the surface of the electrode substrate provided with a switching array of an amorphous silicon semiconductor is rubbed to one direction.
Claim 26
Dependent Claim
18 words
A device according to claim 12 in which the substrate constituting the electrode substrate is glass or plastics.
Claim 27
Independent Claim
70 words
A method for orienting a liquid crystal in a homeotropic alignment with a uniform tilting direction which comprises applying a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue to an electrode substrate having a thin film transistor array, heat-treating the coated silane compound under vacuum, and bringing a liquid crystal into contact with the rubbed surface of the silane compound coating thus heat-treated.
Claim 28
Independent Claim
70 words
A method for orienting a liquid crystal in a homeotropic alignment with a uniform tilting direction which comprises applying a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue to an electrode substrate having a thin film transistor array, heat-treating the coated silane compound under vacuum, and bringing a liquid crystal into contact with the rubbed surface of the silane compound coating thus heat-treated.
Claim 29
Dependent Claim
16 words
A method according to claim 25 in which the liquid crystal is a nematic liquid crystal.
Claim 30
Dependent Claim
21 words
A method according to claim 26 in which the liquid crystal is a nematic liquid crystal of a negative dielectric anisotropy.
Claim 31
Dependent Claim
18 words
A method according to claim 25 in which the liquid crystal is oriented perpendicular to the electrode substrate.
Claim 32
Dependent Claim
34 words
A method according to claim 25 in which the silane compound is that of the formula (1) below: CF.sub.3 (CF.sub.2).sub.n --Si(OR).sub.3 ( 1) where R is alkyl and n is an integer of 1-20.
Claim 33
Dependent Claim
13 words
A method according to claim 29 in which R is methyl or ethyl.
Claim 34
Dependent Claim
14 words
A method according to claim 29 in which n is an integer of 3-7.
Claim 35
Dependent Claim
66 words
A method according to claim 25 in which the silane compound is at least one member selected from the group consisting of CF 3 (CF 2 ) 3 --Si(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 36
Dependent Claim
59 words
A method according to claim 32 in which the silane compound is a mixture of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 37
Dependent Claim
24 words
A method according to claim 25 in which the electrode substrate is provided with a thin film transistor array of an amorphous silicon semiconductor.
Claim 38
Dependent Claim
24 words
A method according to claim 25 in which the heating in vacuum is effected at a temperature of from 60° C. to 200° C.
Claim 39
Dependent Claim
25 words
A method according to claim 25 in which the heating under vacuum is effected at a pressure of from 10 -2 mmHg to 10 mmHg.
Claim 40
Dependent Claim
27 words
A method according to claim 2 in which the heating in vacuum is effected at 60° C.-200° C. at 10 -2 mmHg-10 mmHg for 10 min.-3 hours.
Claim 41
Dependent Claim
70 words
A liquid crystal display device which comprises a liquid crystal in a homeotropic alignment with a uniform tilting direction sandwiched between an electrode substrate having a thin film transistor array, provided with a film formed by coating a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue, heating under vacuum and rubbing the heat-treated surface, and a counter substrate provided with a counter electrode.
Claim 42
Dependent Claim
70 words
A liquid crystal display device which comprises a liquid crystal in a homeotropic alignment with a uniform tilting direction sandwiched between an electrode substrate having a thin film transistor array, provided with a film formed by coating a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue, heating under vacuum and rubbing the heat-treated surface, and a counter substrate provided with a counter electrode.
Claim 43
Dependent Claim
21 words
A device according to claim 38 in which the liquid crystal is a nematic liquid crystal of a negative dielectric anisotropy.
Claim 44
Dependent Claim
22 words
A device according to claim 38 in which the liquid crystal is a nematic liquid crystal composition of a negative dielectric anisotropy.
Claim 45
Dependent Claim
16 words
A device according to claim 38 in which the liquid crystal is in a homeotropic alignment.
Claim 46
Dependent Claim
34 words
A device according to claim 38 in which the silane compound is that of the formula (1) below: CF.sub.3 (CF.sub.2).sub.n --Si(OR).sub.3 ( 1) where R is alkyl and n is an integer of 1-20.
Claim 47
Dependent Claim
13 words
A device according to claim 42 in which R is methyl or ethyl.
Claim 48
Dependent Claim
14 words
A device according to claim 42 in which n is an integer of 3-7.
Claim 49
Dependent Claim
66 words
A device according to claim 38 in which the silane compound is at least one member selected from the group consisting of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 50
Dependent Claim
59 words
A device according to claim 45 in which the silane compound is a mixture of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 51
Dependent Claim
26 words
A device according to claim 38 in which one of the electrode substrate is provided with a thin film transistor array of an amorphous silicon semiconductor.
Claim 52
Dependent Claim
29 words
A device according to claim 47 in which the surface of the electrode substrate provided with a switching array of an amorphous silicon semiconductor is rubbed to one direction.
Claim 53
Dependent Claim
18 words
A device according to claim 38 in which the substrate constituting the electrode substrate is glass or plastics.
Claim 54
Independent Claim
105 words
A method for orienting a liquid crystal which comprises bringing a liquid crystal into contact with the surface of a film comprising a layer of a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue overlying a layer of a condensate of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form which overlies an electrode substrate, or the surface of a film compound of a mixture of the condensates of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form and said silane compound overlying an electrode substrate.
Claim 55
Independent Claim
105 words
A method for orienting a liquid crystal which comprises bringing a liquid crystal into contact with the surface of a film comprising a layer of a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue overlying a layer of a condensate of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form which overlies an electrode substrate, or the surface of a film compound of a mixture of the condensates of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form and said silane compound overlying an electrode substrate.
Claim 56
Dependent Claim
33 words
A method according to claim 50 in which said condensate of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form is tetramer or hexamer of ethyl orthosilicate.
Claim 57
Dependent Claim
34 words
A method according to claim 50 in which the silane compound is that of the formula (1) below: CF.sub.3 (CF.sub.2).sub.n --Si(OR).sub.3 ( 1) where R is alkyl and n is an integer of 1-20.
Claim 58
Dependent Claim
13 words
A method according to claim 52 in which R is methyl or ethyl.
Claim 59
Dependent Claim
14 words
A method according to claim 52 in which n is an integer of 3-7.
Claim 60
Dependent Claim
66 words
A method according to claim 50 in which the silane compound is at least one member selected from the group consisting of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 61
Dependent Claim
59 words
A method according to claim 55 in which the silane compound is a mixture of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 62
Dependent Claim
16 words
A method according to claim 50 in which the liquid crystal is a nematic liquid crystal.
Claim 63
Dependent Claim
21 words
A method according to claim 57 in which the liquid crystal is a nematic liquid crystal of a negative dielectric anisotropy.
Claim 64
Dependent Claim
20 words
A method according to claim 50 in which the liquid crystal is a nematic liquid crystal containing a dichroic dye.
Claim 65
Dependent Claim
18 words
A method according to claim 50 in which the liquid crystal is oriented perpendicular to the electrode substrate.
Claim 66
Dependent Claim
22 words
A method according to claim 50 in which the electrode substrate is provided with a switching array of an amorphous silicon semiconductor.
Claim 67
Dependent Claim
23 words
A method according to claim 50 in which the surface of the electrode substrate to be contacted with the liquid crystal is rubbed.
Claim 68
Dependent Claim
107 words
A liquid crystal display device which comprises a liquid crystal sandwiched between an electrode substrate having a film comprising a layer of a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue overlying a layer of a condensate of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form which overlies the electrode substrate, or a film composed of a mixture of the condensates of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form and said silane compound overlying the electrode substrate, and a counter substrate having a counter electrode.
Claim 69
Dependent Claim
107 words
A liquid crystal display device which comprises a liquid crystal sandwiched between an electrode substrate having a film comprising a layer of a silane compound having alkoxy and an organic residue having at least a fluorine-substituted hydrocarbon residue overlying a layer of a condensate of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form which overlies the electrode substrate, or a film composed of a mixture of the condensates of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form and said silane compound overlying the electrode substrate, and a counter substrate having a counter electrode.
Claim 70
Dependent Claim
21 words
A device according to claim 63 in which the liquid crystal is a nematic liquid crystal having a negative dielectric anisotropy.
Claim 71
Dependent Claim
22 words
A device according to claim 63 in which the liquid crystal is a nematic liquid crystal composition of a negative dielectric anisotropy.
Claim 72
Dependent Claim
20 words
A device according to claim 63 in which the liquid crystal is a nematic liquid crystal containing a dichroic dye.
Claim 73
Dependent Claim
33 words
A device according to claim 63 in which said condensate of several molecules of alkyl orthosilicate in a straight chain form or a branched chain form is tetramer or hexamer of ethyl orthosilicate.
Claim 74
Dependent Claim
34 words
A device according to claim 63 in which the silane compound is that of the formula (1) below: CF.sub.3 (CF.sub.2).sub.n --Si(OR).sub.3 ( 1) where R is alkyl and n is an integer of 1-20.
Claim 75
Dependent Claim
13 words
A device according to claim 68 in which R is methyl or ethyl.
Claim 76
Dependent Claim
14 words
A device according to claim 68 in which n is an integer of 3-7.
Claim 77
Dependent Claim
66 words
A device according to claim 63 in which the silane compound is at least one member selected from the group consisting of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 78
Dependent Claim
59 words
A device according to claim 71 in which the silane compound is a mixture of CF 3 (CF 2 ) 3 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 4 --Si--(OCH 3 ) 3 , CF 3 (CF 2 ) 5 --Si--(OCH 3 ) 3 and CF 3 (CF 2 ) 6 --Si--(OCH 3 ) 3 .
Claim 79
Dependent Claim
24 words
A device according to claim 63 in which one of the electrode substrates is provided with a switching array of an amorphous silicon semiconductor.
Claim 80
Dependent Claim
21 words
A device according to claim 63 in which the liquid crystal is in a homeotropic alignment with a uniform tilting direction.
Claim 81
Dependent Claim
29 words
A device according to claim 74 in which the surface of the electrode substrate provided with a switching array of an amorphous silicon semiconductor is rubbed to one direction.
Claim 82
Dependent Claim
18 words
A device according to claim 63 in which the substrate constituting the electrode substrate is glass or plastics.
Claim 83
Dependent Claim
21 words
A device according to claim 12 or claim 38 in which the device is a guest-host type liquid crystal display device.
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| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |