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US5377033A
Expired / Lapsed
US
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Ferroelectric liquid crystal device with an organosilesquioxane alignment layer and a polyamide or polyester alignment layer
Assignee: 3M Innovative Properties Co
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Filing: 1994-01-13
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Granted: 1994-12-27
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Expires: 2014-01-13
Abstract
Abstract A bistable ferroelectric liquid crystal display device is provided. The device comprises a first substrate, a second substrate opposed to said first substrate, said substrates disposed to provide a non-helicoidal alignment of the ferroelectric liquid crystal material and electrodes on said substrates to define one or a plurality of pixels, said electrode bearing first substrate having an aliphatic polyamide or polyester alignment coating thereon and said electrode bearing second substrate having an organosilsesquioxane polymer coating thereon, and a ferroelectric liquid crystal mixture comprising compounds having fluorinated tail portions with multiple CF 2 groups disposed between said substrates with the proviso that at least one of said substrates is transparent. Also provided is a method for providing an aligned ferroelectric liquid crystal display device.
Inventors
- 👤 Marc D. Radcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
104 words
A bistable ferroelectric liquid crystal display device comprising a first substrate, a second substrate opposed to said first substrate, said substrates disposed to provide a non-helicoidal alignment of the ferroelectric liquid crystal material and electrodes on said substrates to define one or a plurality of pixels, said electrode bearing first substrate having an aliphatic polyamide or polyester alignment coating thereon and said electrode bearing second substrate having an organosilsesquioxane polymer coating thereon, and a ferroelectric liquid crystal mixture comprising compounds having fluorinated tail portions comprising multiple-CF 2 -groups disposed between said substrates with the proviso that at least one of said substrates is transparent.
Claim 2
Dependent Claim
104 words
A bistable ferroelectric liquid crystal display device comprising a first substrate, a second substrate opposed to said first substrate, said substrates disposed to provide a non-helicoidal alignment of the ferroelectric liquid crystal material and electrodes on said substrates to define one or a plurality of pixels, said electrode bearing first substrate having an aliphatic polyamide or polyester alignment coating thereon and said electrode bearing second substrate having an organosilsesquioxane polymer coating thereon, and a ferroelectric liquid crystal mixture comprising compounds having fluorinated tail portions comprising multiple-CF 2 -groups disposed between said substrates with the proviso that at least one of said substrates is transparent.
Claim 3
Dependent Claim
11 words
The device of claim 1 wherein said polyamide coating is nylon.
Claim 4
Dependent Claim
28 words
The device of claim 2 wherein said nylon coating is nylon 6, nylon 6/6, nylon 11, nylon 12, nylon 6/10 or nylon 6/12, copolymers thereof or mixtures thereof.
Claim 5
Dependent Claim
17 words
The device of claim 1 wherein said polyester coating is poly(ethylene terephthalate), poly(butylene terephthalate) or poly(hexylene terephthalate).
Claim 6
Dependent Claim
46 words
The device of claim 1 wherein said organosilsesquioxane polymers have pendant moieties selected from hydrogen atoms, alkyl groups having 1 to 4 carbon atoms, phenyl groups, substituted phenyl groups or vinyl groups and functional groups selected from hydroxy, methoxy, ethoxy or chloro groups or mixtures thereof.
Claim 7
Dependent Claim
16 words
The device of claim 1 wherein both said first substrate and said second substrate are transparent.
Claim 8
Independent Claim
141 words
A method for providing an aligned ferroelectric liquid crystal display device comprising 1) coating a first substrate bearing at least one electrode with a solution of aliphatic polyamide material or polyester material; 2) curing said coated first substrate; 3) rubbing said coating to align said polyamide or polyester; 4) coating a second substrate bearing at least one electrode with a solution of organosilsesquioxane polymer; 5) curing said coated second substrate; 6) placing said substrates with coated faces in opposing position and disposed to provide a non-helicoidal alignment of a ferroelectric liquid crystal material when said liquid crystal material is placed between said coated substrates; 7) securing said so disposed substrates, with the proviso that at least one of said substrates is transparent; 8) disposing between said substrates a ferroelectric liquid crystal mixture comprising fluorinated tail potions comprising multiple CF 2 groups.
Claim 9
Independent Claim
141 words
A method for providing an aligned ferroelectric liquid crystal display device comprising 1) coating a first substrate bearing at least one electrode with a solution of aliphatic polyamide material or polyester material; 2) curing said coated first substrate; 3) rubbing said coating to align said polyamide or polyester; 4) coating a second substrate bearing at least one electrode with a solution of organosilsesquioxane polymer; 5) curing said coated second substrate; 6) placing said substrates with coated faces in opposing position and disposed to provide a non-helicoidal alignment of a ferroelectric liquid crystal material when said liquid crystal material is placed between said coated substrates; 7) securing said so disposed substrates, with the proviso that at least one of said substrates is transparent; 8) disposing between said substrates a ferroelectric liquid crystal mixture comprising fluorinated tail potions comprising multiple CF 2 groups.
Claim 10
Dependent Claim
11 words
The method of claim 7 wherein said polyamide coating is nylon.
Claim 11
Dependent Claim
28 words
The method of claim 8 wherein said nylon coating is nylon 6, nylon 6/6, nylon 11, nylon 12, nylon 6/10 or nylon 6/12, copolymers thereof or mixtures thereof.
Claim 12
Dependent Claim
17 words
The method of claim 7 wherein said polyester coating is poly(ethylene terephthalate), poly(butylene terephthalate) or poly(hexylene terephthalate).
Claim 13
Dependent Claim
46 words
The method of claim 7 wherein said organosilsesquioxane polymers have pendant moieties selected from hydrogen atoms, alkyl groups having 1 to 4 carbon atoms, phenyl groups, substituted phenyl groups or vinyl groups and functional groups selected from hydroxy, methoxy, ethoxy or chloro groups or mixtures thereof.
Claim 14
Dependent Claim
16 words
The method of claim 7 wherein both said first substrate and said second substrate are transparent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |