| abstract |
A liquid crystal medium is based on a mixture of polar compounds having negative dielectric anisotropy and contains at least one fluorinated indan compound. A liquid crystal medium (I) is based on a mixture of polar compounds having negative dielectric anisotropy and contains at least one fluorinated indan compound of formula (I). [Image] R 0>, R 1>H or upto 15C alkyl or alkenyl, optionally monosubstituted by CN or CF 3or halogenated whereby non-neighboring CH 2groups are optionally replaced by -O-, -S-, 1,4-cyclobutyl, -CC- or -O-CO-; A 1>1,4-cyclohexenylene or 1,4-cyclohexylene optionally having non-neighboring CH 2groups replaced by -O- or -S-, 1,4-phenylene optionally having 1-2 CH groups replaced by N, piperidin-1,4-diyl, 1,4-bicyclo[2,2,2]-octylene , naphthalin-2,6-diyl, decahydronaphthalin-2,6-diyl, 1,2,3,4-tetrahydronaphthalin-2,6-diyl, phenanthren-2,7-diyl or fluroen-2,7-diyl with A 1>optionally halogenated; Z 1>-CO-O-, -CF 2O-, -CH 2O-, -CH 2CH 2, -(CH 2) 4-, -C 2F 4-, -CH2CF 2-, -CFCF-, =-CHCF-, -CHCH-, -CC- or a single bond; m : 0-2. An independent claim is included for an electrooptical display having active matrix addressing based on the electrically controlled birefringence (ECB) effect, PALC or IPS (in plane switching) effect and containing the liquid crystal medium (I) as the dielectric. |