| abstract |
The present invention provides a liquid crystal compoundnhaving a negative dielectric constant anisotropy value of anlarge absolute value, a controlled optically anisotropy value,na high resistivity, a high voltage retention, and high stabilitynagainst heat and ultraviolet radiation; a liquid crystalncomposition containing such a liquid crystal compound; and anliquid crystal display element fabricated from such a liquidncrystal composition. n There is disclosed a liquid crystal compound havingn6,6-difluorotetrahydropyran-2,5-diyl, 6,6-difluoro-2,3-dihydro-6H-pyran-2,5-diyl,nand/or 6-fluoro-3,4-dihydro-2H-pyran-2,5-diylnin the skeleton thereof; a liquid crystalncomposition containing such a liquid crystal compound; and anliquid crystal display element fabricated from such a liquidncrystal composition. |