LIQUID CRYSTAL COMPOSITION

摘要

Liquid crystal compositions containing at least one compound of formula: R-Dio-Ph-CN wherein R is alkyl of 2 to 5 carbon atoms, Dio is trans-1,3-dioxane-2,5-diyl and Ph is 1,4-phenylene, and at least one compound of each of the following groups A to D: A) R<1>-Cy-Ph-R<2>, B) R<3>-Cy-Ph-Ph-R<4>, C) R<5>-Cy-Ph-CN, D) R<6>-Cy-COO-Ph-O-R<7> and, in addition in a total amount of 10 to 26% by weight at least five compounds of formula E R<8>-Pyr-Ph-O-R<9> or at least one compound of each of the following groups F to K: F) R<10>-Ph-COO-Ph-R<11>, G) R<12>-Cy-COO-Ph-Ph-CN, H) R<13>-Ph-Ph-COO-Ph-Ph-CN, J) R<14>-Ph-COO-Ph-COO-Ph-R<15>, K) R<16>-Ph-Ph-COO-PhF-R<17> result in surprisingly steep electrooptical characteristics and surprisingly low viewing-angle dependence of the contrast at simultaneously acceptable threshold voltages for commercially available drivers and multiplex ratios up to 1:100 when used in matrix displays.