EP0219479A2
Expired / Lapsed
EP
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Improvements of ferroelectric liquid crystal devices
Assignee: FLC Innovation AB
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Filing: 1986-10-14
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Granted: —
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Expires: 2006-10-14
Abstract
Abstract The invention regards surface-stabilized ferro-electric liquid crystals (SSLFC). It is proposed to make the surface treatment of the two limiting surfaces ensure symmetric behaviour between separate bistable states. Means are further proposed to ensure freedom of long-run net transport of impurities in any one direction due to electric fields used for switching, particularly in array systems.
Inventors
- 👤 Sven T. Lagerwall
- 👤 Jürgen Wahl
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
45 words
A liquid crystal device having a liquid crystal layer arranged between two parallel surfaces and comprising a ferroelectric liquid crystal substance, wherein said surfaces are treated so as to obtain symmetrization between energies of polarization states obtainable by switching by means of applied electrical fields.
Claim 2
Dependent Claim
45 words
A liquid crystal device having a liquid crystal layer arranged between two parallel surfaces and comprising a ferroelectric liquid crystal substance, wherein said surfaces are treated so as to obtain symmetrization between energies of polarization states obtainable by switching by means of applied electrical fields.
Claim 3
Dependent Claim
48 words
A liquid crystal device having a liquid crystal layer arranged between two prallel surfaces and comprising a ferroelectric liquid crystal substance, wherein liquid crystal materials having opposite polarity preferences are mixed for obtaining symmetrization between energies of polarization states obtainable by switching by means of applied electrical fields.
Claim 4
Dependent Claim
48 words
A liquid crystal device having a liquid crystal layer arranged between two prallel surfaces and comprising a ferroelectric liquid crystal substance, wherein liquid crystal materials having opposite polarity preferences are mixed for obtaining symmetrization between energies of polarization states obtainable by switching by means of applied electrical fields.
Claim 5
Dependent Claim
12 words
A liquid crystal device of Claim l or 2 having grey-scale properties.
References Cited (Backward Citations)
No citation records indexed.
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