US4469409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous alignment layer for liquid crystal display device
Assignee: Hitachi Ltd
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Filing: 1982-08-18
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Granted: 1984-09-04
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Expires: 2002-08-18
Abstract
Abstract A liquid crystal display device comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by an aromatic ring-containing silane group, and an organic polymer at the electrode side, where the heat resistance and adhesiveness of the coating film to the electrode substrates are improved without any undercoating film therebetween.
Inventors
- 👤 Fumio Nakano
- 👤 Kishiro Iwasaki
- 👤 Seikichi Tanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133719; C; C09; C09K; C09K2323/00; C09K2323/02; C09K2323/023
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
38 words
A liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by an aromatic ring-containing silane group, and an organic polymer at the electrode side.
Claim 2
Dependent Claim
38 words
A liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by an aromatic ring-containing silane group, and an organic polymer at the electrode side.
Claim 3
Dependent Claim
51 words
The liquid crystal display device according to claim 1, wherein the aromatic ring of the silanol oligomer modified by the aromatic ring-containing silane group is one of the groups represented by the following formulae: ##STR7## wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
Claim 4
Dependent Claim
40 words
A twist-nematic type liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by an aromatic ring-containing silane group, and an organic polymer at the electrode side.
Claim 5
Dependent Claim
40 words
A twist-nematic type liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by an aromatic ring-containing silane group, and an organic polymer at the electrode side.
Claim 6
Dependent Claim
51 words
The liquid crystal display device according to claim 3, wherein the aromatic ring of the silanol oligomer modified by the aromatic ring-containing silane group is one of the groups represented by the following formulae: ##STR8## wherein R is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
Claim 7
Dependent Claim
27 words
The liquid crystal display device according to any one of claims 1 to 4 wherein the aligning coating film has a refractive index of 1.65 to 1.85.
Claim 8
Dependent Claim
30 words
The liquid crystal display device according to any one of claims 1 to 4 wherein the organic polymer is a polyamic acid capable of forming polyimide by ring closure reaction.
Claim 9
Dependent Claim
30 words
The liquid crystal display device according to any one of claims 1 to 4 wherein the organic polymer is selected from soluble aromatic polyamide, aromatic polyether amide and aliphatic polyamide.
Claim 10
Dependent Claim
48 words
The liquid crystal display device according to any one of claims 1 to 4 wherein the silanol oligomer modified by an aromatic ring-containing silane group is the one, 10 to 90% by mole of OH groups of whose silanol oligomer is substituted by the aromatic ring-containing silane groups.
Claim 11
Dependent Claim
47 words
The liquid crystal display device according to any one of claims 1 to 4 wherein the homogeneous mixture has a mixing ratio of the silanol oligomer modified by an aromatic ring-containing silane group to the organic polymer of about 1:1 by weight in terms of solid matters.
Claim 12
Dependent Claim
50 words
A liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by a silane group with one aromatic ring having an alkyl group having 1 to 8 carbon atoms, and an organic polymer at the electrode side.
Claim 13
Dependent Claim
50 words
A liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by a silane group with one aromatic ring having an alkyl group having 1 to 8 carbon atoms, and an organic polymer at the electrode side.
Claim 14
Dependent Claim
52 words
A twist-nematic type liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by a silane group with one aromatic ring having an alkyl group having 1 to 8 carbon atoms, and an organic polymer at the electrode side.
Claim 15
Dependent Claim
52 words
A twist-nematic type liquid crystal display device which comprises transparent electrode substrates having an aligning coating film of a homogeneous mixture comprising a silanol oligomer modified by a silane group with one aromatic ring having an alkyl group having 1 to 8 carbon atoms, and an organic polymer at the electrode side.
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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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |