Patent US4494824A successfully refreshed from Google Patents.
US4494824A
Expired / Lapsed
US
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Liquid crystal display with small impedance orienting film
Assignee: Sharp Corp
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Filing: 1982-12-17
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Granted: 1985-01-22
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Expires: 2002-12-17
Abstract
Abstract A liquid crystal display device comprises a pair of opposed substrates, a transparent electrode on at least one of the substrates, a liquid crystal composition, a characteristic orienting film comprising an organic high copolymer resin film formed at least over the surface of the electrode, and which shows an excellent orientation, and conductive particles mixed within the orienting film to reduce the resistance of the orienting film.
Inventors
- 👤 Takeshi Nakamura
- 👤 Seiji Okamoto
- 👤 Kazuyoshi Hirayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:59
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/32; C09K2019/328; C09K2323/00; C09K2323/05; C09K2323/053
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A liquid crystal display device comprising a pair of opposed substrates, a transparent electrode provided on at least one of the substrates, a liquid crystal composition sandwiched between the substrates, an orienting film of an organic high copolymer resin formed at least over the surface of the electrode which is on the substrate and is to be in contact with the liquid crystal composition, and conductive particles mixed within the orienting film to reduce the resistance of the orienting film.
Claim 2
Dependent Claim
80 words
A liquid crystal display device comprising a pair of opposed substrates, a transparent electrode provided on at least one of the substrates, a liquid crystal composition sandwiched between the substrates, an orienting film of an organic high copolymer resin formed at least over the surface of the electrode which is on the substrate and is to be in contact with the liquid crystal composition, and conductive particles mixed within the orienting film to reduce the resistance of the orienting film.
Claim 3
Dependent Claim
15 words
The device of claim 1, wherein the conductive particles are made of Ag or C.
Claim 4
Dependent Claim
20 words
The device of claim 1, wherein the conductive particles are mixed within the orienting film in about 1 wt %.
Claim 5
Dependent Claim
21 words
The device of claim 1, wherein the diameters of the conductive particles are in the range of about 0.1-about 0.2 μm.
Claim 6
Dependent Claim
105 words
The device of claim 1, wherein the organic high copolymer resin is a polyimide-siloxane copolymer resin formed by copolymerizing, in an organic solvent, a diaminosiloxane having the formula (I): ##STR8## wherein R is a bivalent organic group, R' is a monovalent organic group and x is an integer from 1 to 4, with a diamine having the formula (II): H.sub.2 N--Q--NH.sub.2 wherein Q is a bivalent organic group free from silicon atom, and a tetracarboxylic acid dianhydride having the formula (III): ##STR9## wherein R" is a tetravalent organic group, to yield a polyamido acid-siloxane copolymer resin, and subjecting it to an internal condensation under heating.
Claim 7
Dependent Claim
78 words
A liquid crystal display device comprising a pair of opposed substrates, a transparent electrode provided on at least one of the substrates, a liquid crystal composition sandwiched between the substrates, an orienting film of an organic high copolymer resin formed at least over the surface of the electrode which is on the substrate and is to be in contact with the liquid crystal composition, and holes within the orienting film to reduce the resistance of the orienting film.
Claim 8
Dependent Claim
78 words
A liquid crystal display device comprising a pair of opposed substrates, a transparent electrode provided on at least one of the substrates, a liquid crystal composition sandwiched between the substrates, an orienting film of an organic high copolymer resin formed at least over the surface of the electrode which is on the substrate and is to be in contact with the liquid crystal composition, and holes within the orienting film to reduce the resistance of the orienting film.
References Cited (Backward Citations)
US4038441A
Cited
JPS5553317A
Cited
JPS55105224A
Cited
JPS56114926A
Cited
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Cited
US4381886A
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |