Liquid crystalline compound having a negative dielectric anisotropy value, liquid crystal composition containing the liquid crystalline compound, and liquid crystal display element produced utilizing the liquid crystal composition

摘要

The present invention provides a liquid crystal compound having a negative dielectric constant anisotropy value of a large absolute value, a controlled optically anisotropy value, a high resistivity, a high voltage retention, and high stability against heat and ultraviolet radiation; a liquid crystal composition containing such a liquid crystal compound; and a liquid crystal display element fabricated from such a liquid crystal composition.PPThere is disclosed a liquid crystal compound having 6,6-difluorotetrahydropyran-2, 5-diyl, 6,6- difluoro-2,3- dihydro-6H-pyran-2,5-diyl, and/or 6-fluoro-3,4- dihydro-2H- pyran-2,5-diyl in the skeleton thereof; a liquid crystal composition containing such a liquid crystal compound; and a liquid crystal display element fabricated from such a liquid crystal composition.