US4273420A
Expired / Lapsed
US
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Liquid crystal display device
Assignee: Hitachi Ltd
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Filing: 1979-07-09
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Granted: 1981-06-16
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Expires: 1999-07-09
Abstract
Abstract A liquid crystal display device using an alignment film of ladder-type organosilicone polymer or cross-linking product of cross-linkable ladder-type organosilicone polymer makes a homogeneous liquid crystal orientation, irrespectively of the kind of the liquid crystal used, never lowers its orientation ability even when fusion-sealing or sealing of the liquid crystal device is made with glass or thermosetting resin, and makes a clear display owing to the alignment film being colorless. The alignment film is insoluble in the liquid crystal used.
Inventors
- 👤 Takeshi Watanabe
- 👤 Ryoichi Sudo
- 👤 Fusaji Shoji
- 👤 Issei Takemoto
- 👤 Hitoshi Yokono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:05
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; C09K19/40; C09K19/406; C09K19/408; C09K2323/00; C09K2323/02; C09K2323/023; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A liquid crystal display device having a liquid crytal layer between a pair of substrates, each, having an electrode thereon, which comprises an alignment film of ladder-type organosilicone polymer represented by the following general formula of repetition unit being formed on counter-faced sides of said substrates: ##STR17## wherein n=25-5,000, X is Si or one of metals of Al, Ti, B, Ge, Sn, P, As, Mg, Pb, Zr, Sb, Cr, Fe, Co, and Ni, and R is at least one member selected from phenyl group, alkyl-substituted phenyl group, halogen-substituted phenyl group, diphenyl group, alkyl-substituted diphenyl group, halogen-substituted diphenyl group, naphthyl group, alkyl-substituted naphthyl group, halogen-substituted naphthyl group, and alkyl groups including methyl group, ethyl group, propyl group, butyl group, amyl group, hexyl group, etc.
Claim 2
Dependent Claim
123 words
A liquid crystal display device having a liquid crytal layer between a pair of substrates, each, having an electrode thereon, which comprises an alignment film of ladder-type organosilicone polymer represented by the following general formula of repetition unit being formed on counter-faced sides of said substrates: ##STR17## wherein n=25-5,000, X is Si or one of metals of Al, Ti, B, Ge, Sn, P, As, Mg, Pb, Zr, Sb, Cr, Fe, Co, and Ni, and R is at least one member selected from phenyl group, alkyl-substituted phenyl group, halogen-substituted phenyl group, diphenyl group, alkyl-substituted diphenyl group, halogen-substituted diphenyl group, naphthyl group, alkyl-substituted naphthyl group, halogen-substituted naphthyl group, and alkyl groups including methyl group, ethyl group, propyl group, butyl group, amyl group, hexyl group, etc.
Claim 3
Dependent Claim
31 words
A liquid crystal display device according to claim 1, wherein the alignment film of the ladder-type organosilicone polymer is one compound selected from poly(phenylsilsesquioxane), poly(phenylisoamylsilsesquioxane), poly(m-chlorophenylsilsesquioxane), poly(phenylisobutylsilsesquioxane), poly(aluminophenylsiloxane), poly(titanophenylsiloxane), and poly(boronophenylsiloxane).
Claim 4
Dependent Claim
179 words
A liquid crystal display device having a liquid crystal layer between a pair of substrates, each, having an electrode thereon, which comprises an alignment film of cross-linked product of cross-linkable, ladder-type organosilicone polymer represented by the following general formula of repetition unit being formed on counter-faced sides of the substrates: ##STR18## wherein N=25-5,000, X is Si or one of metals of Al, Ti, B, Ge, Sn, P, As, Mg, Pb, Zr, Sb, Cr, Fe, Co, and Ni, and R is such that not more than 30% by mole of R in the repetition unit of said general formula is one group capable of undergoing cross-linking reaction, selected from: --(CH 2 ) n --OH (n=1-5), --(CH 2 ) n --SH (n=1-5), --(CH 2 ) n X (n=1-5; X=Cl, I, Br or F), --(CH 2 ) n NH 2 (n=1-5), ##STR19## and more than 70% of R is at least one group, selected from phenyl group, alkyl-substituted phenyl group, halogen-substituted phenyl group, diphenyl group, alkyl-substituted diphenyl group, halogen-substituted diphenyl group, naphthyl group, alkyl-substituted naphthyl group, halogen-substituted naphthyl group, and alkyl group.
Claim 5
Dependent Claim
179 words
A liquid crystal display device having a liquid crystal layer between a pair of substrates, each, having an electrode thereon, which comprises an alignment film of cross-linked product of cross-linkable, ladder-type organosilicone polymer represented by the following general formula of repetition unit being formed on counter-faced sides of the substrates: ##STR18## wherein N=25-5,000, X is Si or one of metals of Al, Ti, B, Ge, Sn, P, As, Mg, Pb, Zr, Sb, Cr, Fe, Co, and Ni, and R is such that not more than 30% by mole of R in the repetition unit of said general formula is one group capable of undergoing cross-linking reaction, selected from: --(CH 2 ) n --OH (n=1-5), --(CH 2 ) n --SH (n=1-5), --(CH 2 ) n X (n=1-5; X=Cl, I, Br or F), --(CH 2 ) n NH 2 (n=1-5), ##STR19## and more than 70% of R is at least one group, selected from phenyl group, alkyl-substituted phenyl group, halogen-substituted phenyl group, diphenyl group, alkyl-substituted diphenyl group, halogen-substituted diphenyl group, naphthyl group, alkyl-substituted naphthyl group, halogen-substituted naphthyl group, and alkyl group.
Claim 6
Dependent Claim
173 words
A liquid crystal display device having a liquid crystal layer between a pair of substrates, each, having an electrode thereon, which comprises an alignment film of cross-linked product of cross-linkable, ladder-type organosilicone polymer having the following general formula of repetition unit being formed on counter-faced sides of the substrates: ##STR20## wherein n=25-5,000, X is Si or one of metals of Al, Ti, B, Ge, Sn, P, As, Mg, Pb, Zr, Sb, Cr, Fe, Co, and Ni, and R is such that 0.5-30% by mole of R in the repetition unit of said general formula is one group capable of undergoing cross-linking reaction, selected from: --(CH 2 ) n --OH (n=1-5), --(CH 2 ) n --SH (n=1-5), --(CH 2 ) n X (n=1-5; X=Cl, I, Br or F), --(CH 2 ) n NH 2 (n=1-5), ##STR21## and 70-99.5% of R is at least one group, selected from phenyl group, alkyl-substituted phenyl group, halogen-substituted phenyl group, diphenyl group, alkyl-substituted diphenyl group, halogen-substituted diphenyl group, naphthyl group, alkyl-substituted naphthyl group, halogen-substituted napthyl group, and alkyl group.
Claim 7
Dependent Claim
173 words
A liquid crystal display device having a liquid crystal layer between a pair of substrates, each, having an electrode thereon, which comprises an alignment film of cross-linked product of cross-linkable, ladder-type organosilicone polymer having the following general formula of repetition unit being formed on counter-faced sides of the substrates: ##STR20## wherein n=25-5,000, X is Si or one of metals of Al, Ti, B, Ge, Sn, P, As, Mg, Pb, Zr, Sb, Cr, Fe, Co, and Ni, and R is such that 0.5-30% by mole of R in the repetition unit of said general formula is one group capable of undergoing cross-linking reaction, selected from: --(CH 2 ) n --OH (n=1-5), --(CH 2 ) n --SH (n=1-5), --(CH 2 ) n X (n=1-5; X=Cl, I, Br or F), --(CH 2 ) n NH 2 (n=1-5), ##STR21## and 70-99.5% of R is at least one group, selected from phenyl group, alkyl-substituted phenyl group, halogen-substituted phenyl group, diphenyl group, alkyl-substituted diphenyl group, halogen-substituted diphenyl group, naphthyl group, alkyl-substituted naphthyl group, halogen-substituted napthyl group, and alkyl group.
Claim 8
Dependent Claim
65 words
A liquid crystal display device according to claim 4, wherein the alignment film of the cross-linking product of cross-linkable, ladder-type organosilicone polymer is one of cross-linking products of poly(phenylsilsesquioxane) containing 0.5-30% of R by mole of γ-phenylaminopropyl group in the repetition unit, poly(phenylsilsesquioxane) containing 0.5-30% by mole of γ-aminopropyl group in repetition unit, and poly(phenylsilsesquioxane) containing 0.5-30% by mole of tolyl group in repetition unit.
References Cited (Backward Citations)
US4038441A
Cited
US3991241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |