| abstract |
PCT No. PCT/JP94/00389 Sec. 371 Date Oct. 26, 1995 Sec. 102(e) Date Oct. 26, 1995 PCT Filed Mar. 10, 1994 PCT Pub. No. WO94/20443 PCT Pub. Date Sep. 15, 1994As a liquid crystal compound, a dicyclohexylethylene derivative, which has a wide liquid crystal phase temperature range, a low viscosity, a large DELTA epsilon value, a high stability, and an excellent compatibility with other liquid crystal compounds. The dicyclohexylethylene derivative is represented by general formula (I), <IMAGE> (I) wherein R represents C1-C10 linear alkyl; and X represents fluorine or trifluoromethyl. This compound can widen the working range of a liquid crystal display element because of its high NI point, can improve the response speed of the display element because of its low viscosity, and can lower the voltage for driving the display element because of its high positive DELTA epsilon value. Furthermore, it is so stable against changes in environmental factors that it can be used in various liquid crystal display elements of, for example, active matrix drive type using TFT. |