US5024850A
Expired / Lapsed
US
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Method of manufacturing a polarization filter and a polarization filter so obtained
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1989-12-06
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Granted: 1991-06-18
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Expires: 2009-12-06
Abstract
Abstract A method of manufacturing a polarization filter, in which a mixture of a liquid crystalline diacrylate monomer or dimethacrylate monomer and a dichroic colorant is provided on a substrate, oriented and polymerized by exposing it to radiation, as well as a polarization filter which is manufactured according to the above method, and a display comprising the polarization filter.
Inventors
- 👤 Dirk J. Broer
- 👤 Jan van der Veen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133528; G02B; G02B5/00; G02B5/20; C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/52; C09K19/60; G02B5/30; G02B5/3016; C09K2323/00; C09K2323/03; C09K2323/031; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31623; Y10T428/31721
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A method of manufacturing a polarization filter, in which a mixture of a liquid crystalline monomer and a dichroic colorant is oriented on a substrate, and the monomer is polymerized by exposing it to uniform radiation, characterized in that a monomer is used which corresponds to the formula ##STR18## wherein B is a bridging group, R is a hydrogen atom or a methyl group, and M is a mesogenic group comprising at least a phenyl group and/or a cyclohexyl group, so that the monomer as a whole acquires a nematic or smectic phase.
Claim 2
Independent Claim
93 words
A method of manufacturing a polarization filter, in which a mixture of a liquid crystalline monomer and a dichroic colorant is oriented on a substrate, and the monomer is polymerized by exposing it to uniform radiation, characterized in that a monomer is used which corresponds to the formula ##STR18## wherein B is a bridging group, R is a hydrogen atom or a methyl group, and M is a mesogenic group comprising at least a phenyl group and/or a cyclohexyl group, so that the monomer as a whole acquires a nematic or smectic phase.
Claim 3
Dependent Claim
52 words
A method as claimed in claim 1, characterized in that a monomer is used which corresponds to the formula ##STR19## wherein m is equal to 1-15, n is equal to 0 to 1, R is a hydrogen atom or a methyl group, and P is the group ##STR20## or the group ##STR21##
Claim 4
Dependent Claim
46 words
A method as claimed in claim 2, characterized in that the mixture of the liquid crystalline monomer and a dichroic colorant applied to the substrate is directed (oriented) under the influence of an external field of force, in particular a magnetic field or an electric field.
Claim 5
Dependent Claim
46 words
A method as claimed in claim 1, characterized in that the mixture of the liquid crystalline monomer and a dichroic colorant applied to the substrate is directed (oriented) under the influence of an external field of force, in particular a magnetic field or an electric field.
Claim 6
Dependent Claim
94 words
A polarization filter obtained by using the method as claimed in claim 1, characterized in that the filter comprises a substrate which is provided on one side with a layer of an oriented and polymerized monomer in which a dichroic colorant is incorporated, said monomer corresponding to the formula ##STR22## wherein B is a bridging group, R is a hydrogen atom or a methyl group, and M is a mesogenic group comprising at least a phenyl group and/or a cyclohexyl group, so that the monomer as a whole acquires a nematic or smectic phase.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-17 | 1994-12-17 | 1995-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-17 | 1998-12-17 | 1999-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-17 | 2002-12-17 | 2003-06-18 | $7700.00 | Window Closed / Lapsed |