FERROELECTRIC LIQUID CRYSTAL COMPOSITION AND FERROELECTRIC LIQUID CRYSTAL ELEMENT AND DRIVING METHOD THEREFOR

PROBLEM TO BE SOLVED: To obtain a ferroelectric liq. crystal compsn. having a large temp. dependence of spontaneous polarization and a liq. crystal element prepd. from the same, having a small temp. dependence of response speed, and providing a wide temp. margin in its practical use by compounding a...

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Bibliographic Details
Main Authors KANEKO TAKESHI, HARUFUJI TATSUJI, SAITO SHINICHI, KOUDEN MITSUHIRO, SAITO HIDEO, OKABE EIJI
Format Patent
LanguageEnglish
Published 08.09.1998
Edition6
Subjects
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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Summary:PROBLEM TO BE SOLVED: To obtain a ferroelectric liq. crystal compsn. having a large temp. dependence of spontaneous polarization and a liq. crystal element prepd. from the same, having a small temp. dependence of response speed, and providing a wide temp. margin in its practical use by compounding a specific ferroelectric compd. and two specific compds. SOLUTION: This compsn. is prepd. by compounding 0.5-60wt.%, pref. 0.5-30wt.% compd. represented by formula I (wherein R1 is 4-16C alkyl; and R2 is 2-12C alkyl) with at least one compd. represented by formula II (wherein R3 and R4 are each 1-15C alkyl or alkoxy; and A is a group represented by formula III) and at least one compd. represented by formula IV (wherein R5 and R6 are each 1-18C alkyl or alkoxy; and X is H or one or two fluorine atoms) in a wt. ratio of the compd. represented by formula II to the compd. represented by formula IV of (40/60)-(90/10). Since the compsn. contains the compd. represented by formula I in a low concn. and has a relatively low spontaneous polarization. a good ferroelectric liq. crystal element hardly causing image persistence can be obtd.
Bibliography:Application Number: JP19970046528