US4842375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the orientation of liquid crystals
Assignee: Werk fuer Fernsehelektronik im VEB Kombinat Mikroelektronik VEB
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Filing: 1987-07-10
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Granted: 1989-06-27
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Expires: 2007-07-10
Abstract
Abstract The orientation of a thermotropic LC volume is achieved by means of thermotropic LC molecules firmly bonded chemically to a matrix. The orientation takes place due to the physical and chemical properties of the LC volume, chemically bonded to the matrix on the disordered LC volume. Hydrocarbon polymers or organosilanes are used as the matrix, to the functional groups of which the thermotropic liquid crystal molecules, which also have functional groups suitable for bonding to the matrix, are chemically linked. The chemically linked thermotropic LC may be a nematic, cholesterinic, discotic or smectic LC, with which nematic, cholesterinic, discotic or smectic LC volumes can be oriented. The matrix is chemically bonded covalently to the substrate surface and may be colored due to additional coupling of reactive dyes.
Inventors
- 👤 Arno Seeboth
- 👤 Joerg Gloede
- 👤 Hans-Dieter Koswig
- 👤 Horst Ladwig
- 👤 Hartwin Obernik
- 👤 Helmuth Seeboth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:25
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133719
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
47 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of a copolymer of maleic acid and maleic anhydride, and then linking the matrix as an orienting layer to a substrate surface.
Claim 2
Independent Claim
47 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of a copolymer of maleic acid and maleic anhydride, and then linking the matrix as an orienting layer to a substrate surface.
Claim 3
Independent Claim
57 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of a copolymer of monomers including a monomer selected from the group consisting of methacryllic acid and methacrylic anhydride, and then linking the matrix as an orienting layer to a substrate surface.
Claim 4
Independent Claim
57 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of a copolymer of monomers including a monomer selected from the group consisting of methacryllic acid and methacrylic anhydride, and then linking the matrix as an orienting layer to a substrate surface.
Claim 5
Independent Claim
60 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of a polymer of a single monomer, the polymer including a carbon atom-containing chain and hydrogen atoms pendent from said carbon atoms, and then linking the matrix as an orienting layer to a substrate surface.
Claim 6
Independent Claim
60 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of a polymer of a single monomer, the polymer including a carbon atom-containing chain and hydrogen atoms pendent from said carbon atoms, and then linking the matrix as an orienting layer to a substrate surface.
Claim 7
Independent Claim
45 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of polyvinyl alcohol, and then through a coupling agent linking the matrix as an orienting layer to a substrate surface.
Claim 8
Independent Claim
45 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a portion of functional groups of a matrix of polyvinyl alcohol, and then through a coupling agent linking the matrix as an orienting layer to a substrate surface.
Claim 9
Independent Claim
55 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a first portion of the functional groups of a matrix, chemically bonding reactive dyes to a second portion of the functional groups of the matrix, and then linking the matrix as an orienting layer to a substrate surface.
Claim 10
Independent Claim
55 words
A method for orienting liquid crystals uniformly on a substrate surface, comprising bonding thermotropic liquid crystals to a first portion of the functional groups of a matrix, chemically bonding reactive dyes to a second portion of the functional groups of the matrix, and then linking the matrix as an orienting layer to a substrate surface.
Claim 11
Dependent Claim
23 words
A method as in claim 5, wherein reactive dyes are chemically bonded to 1 to 30% of the functional groups of the matrix.
Claim 12
Dependent Claim
23 words
A method as in claim 6, wherein reactive dyes are chemically bonded to 2 to 4% of the functional groups of the matrix.
Claim 13
Dependent Claim
61 words
A liquid crystal display comprising a substrate having a surface, a matrix of a copolymer of maleic acid and maleic anhydride, said matrix being linked to the substrate surface and having functional groups, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 14
Dependent Claim
61 words
A liquid crystal display comprising a substrate having a surface, a matrix of a copolymer of maleic acid and maleic anhydride, said matrix being linked to the substrate surface and having functional groups, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 15
Dependent Claim
71 words
A liquid crystal display comprising a substrate having a surface, a matrix of a copolymer of monomers including a monomer selected from the group consisting of methacrylic acid and methacrylic anhydride, said matrix being linked to the substrate surface and having functional groups, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 16
Dependent Claim
71 words
A liquid crystal display comprising a substrate having a surface, a matrix of a copolymer of monomers including a monomer selected from the group consisting of methacrylic acid and methacrylic anhydride, said matrix being linked to the substrate surface and having functional groups, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 17
Dependent Claim
74 words
A liquid crystal display comprising a substrate having a surface, a matrix of a polymer of a single monomer, the polymer including a carbon atom-containing chain and hydrogen atoms pendent from said carbon atoms, said matrix being linked to the substrate surface and having functional groups, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 18
Dependent Claim
74 words
A liquid crystal display comprising a substrate having a surface, a matrix of a polymer of a single monomer, the polymer including a carbon atom-containing chain and hydrogen atoms pendent from said carbon atoms, said matrix being linked to the substrate surface and having functional groups, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 19
Dependent Claim
59 words
A liquid crystal display comprising a substrate having a surface, a matrix of polyvinyl alcohol, said matrix having functional groups and being linked to the substrate surface through a coupling agent, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermoplastic liquid crystals are oriented uniformly on the substrate surface.
Claim 20
Dependent Claim
59 words
A liquid crystal display comprising a substrate having a surface, a matrix of polyvinyl alcohol, said matrix having functional groups and being linked to the substrate surface through a coupling agent, and thermotropic liquid crystals bonded to at least some of the functional groups of the matrix, whereby the thermoplastic liquid crystals are oriented uniformly on the substrate surface.
Claim 21
Dependent Claim
65 words
A liquid crystal display comprising a substrate having a surface, a matrix linked to the substrate surface, the matrix having functional groups, thermotropic liquid crystals bonded to a first portion of the functional groups of the matrix, and reactive dyes chemically bonded to a second portion of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 22
Dependent Claim
65 words
A liquid crystal display comprising a substrate having a surface, a matrix linked to the substrate surface, the matrix having functional groups, thermotropic liquid crystals bonded to a first portion of the functional groups of the matrix, and reactive dyes chemically bonded to a second portion of the functional groups of the matrix, whereby the thermotropic liquid crystals are oriented uniformly on the substrate surface.
Claim 23
Dependent Claim
25 words
A liquid crystal display as in claim 12, wherein reactive dyes are chemically bonded to 1 to 30% of the functional groups of the matrix.
Claim 24
Dependent Claim
25 words
A liquid crystal display as in claim 13, wherein reactive dyes are chemically bonded to 2 to 4% of the functional groups of the matrix.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |