LIQUID CRYSTAL DISPLAY CELL WITH CHIRAL FERROELECTRIC SMECTIC LIQUID CRYSTAL LAYER

The liquid-crystal display cell contains an oriented chiral ferroelectric smectic liquid-crystal layer comprising an achiral SC host mixture and one or more chiral dopes. The host mixture comprises at least two LC components, of which at least one has a tilted smectic phase (for example SC). The dop...

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Bibliographische Detailangaben
Hauptverfasser:	SCHADT, MARTIN, CHERNOVA, NINA I, BUCHECKER, RICHARD, CHIGRINOV, VLADIMIR G, PANARIN, YURI P, BEROSNEV, LEONID A, POZHIDAEV, FVGENIY P, FUENFSCHILLING, JUERY, LOSEVA, MARINA V
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DYES FREQUENCY-CHANGING MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PAINTS PHYSICS POLISHES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	The liquid-crystal display cell contains an oriented chiral ferroelectric smectic liquid-crystal layer comprising an achiral SC host mixture and one or more chiral dopes. The host mixture comprises at least two LC components, of which at least one has a tilted smectic phase (for example SC). The dopes, individually or together, induce a helix pitch p of < 1 mu m. The total mixture has a polarisability P of > 10 nC/cm and an SC tilt angle theta of > 10 DEG . After activation in an electrical field at zero voltage and with crossed polarisers, dark parallel bars indicate the existence of an inhomogeneous structure.