LIQUID CRYSTAL COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION CONTAINING THE LIQUID CRYSTAL COMPOUND AND LIQUID CRYSTAL DISPLAY ELEMENT PRODUCED BY USING THE LIQUID CRYSTAL COMPOSITION

PROBLEM TO BE SOLVED: To obtain a liquid crystal compound having low viscosity, negative dielectric anisotropy and excellent optical anisotropy, voltage-retention, stability and compatibility and useful for liquid crystal display element, etc., by introducing a specific group into a skeleton structu...

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Hauptverfasser:	KOIZUMI YASUYUKI, YANO HITOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS 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 HETEROCYCLIC COMPOUNDS 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 ORGANIC CHEMISTRY PAINTS PHYSICS POLISHES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a liquid crystal compound having low viscosity, negative dielectric anisotropy and excellent optical anisotropy, voltage-retention, stability and compatibility and useful for liquid crystal display element, etc., by introducing a specific group into a skeleton structure. SOLUTION: The compound has a group of C(CF3 )2 G and/or GC(CF3 )2 [G is O, a (1-10C alkyl-substituted)imino, etc.] in the skeleton structure and is expressed by the formula [R and Y are each a 1-20C alkyl, H, a halogen cyano, etc.; X to X are each (CH2 )2 , CH=CH, C≡C, COO, C(CF3 )2 G, etc.; the rings A to A are each trans-cyclohexane-1,4-diyl, cyclohex-1-ene-1,4-diyl, 1,4-phenylene, etc.; a to a are each 0 or 1; a +a +a +a +a >=1].