Electro-optical liquid-crystal

Abstract

The invention relates to an electrooptical liquid-crystal display having a realignment layer for realigning the liquid crystals, where the field thereof has a significant component parallel to the liquid-crystal layer, containing a liquid-crystalline medium having positive dielectric anisotropy, where the medium comprises at least one mesogenic compound which contains a group of the formula I and at least one compound of formula II wherein L1 is H or F; R1 R2 are H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which may be substituted; Q is a radical of the formula —(O)q (CH2)r—(CF2)s— in which q is 0 or 1; r is 0 or an integer of 1 to 6, and s is an integer of 0 to 6; X is F or Cl, and in the case where s ≠0, is alternatively H, and A1 and A2 are each, independently of one another, a 1,4-cyclohexenylene or trans-1,4-cyclohexylene which may be substituted; 1,4-phenylene in which may be substituted, 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4 tetrahydronaphthalene-2,6-diyl, which may be substituted; L2 and L3 are each, independently of one another, H or F; Z1 and Z2 are each, independently of one another, —CO—O—, —O—CO—, —CH2O—, —OCH2—, —CH2CH2—, —CH═CH—, —C≡C— or a single bond, or one of the radicals Z1 and Z2 is alternatively —(CH2)4— or —CH═CH—CH2CH2—, and m is 0, 1 or 2.

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