Liquid crystalline compound having a negative dielectric anisotr

Details Liquid crystalline compound having a negative dielectric anisotr Liquid crystalline compound having a negative dielectric anisotr

1998-08-18

2000-11-14

Wu, Shean C.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

25229961, 25229962, 25229963, 549428, C09K 1930, C09K 1934, G02F 113, C07D30902, C07D31500

Patent

active

061467189

ABSTRACT:
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.
There 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.

REFERENCES:
CA 129: 129082, 1998.
CA 105: 190850, 1985.
Ca 79: 66277, 1973.
CA 73: 119856, 1970.

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