Electro-optical light control element, display and medium

A electro-optical display, containing one or more light modulation elements comprising

• an electrode arrangement,
• at least one element for polarisation of the light, and
• a mesogenic modulation medium having a value of Δ∈ of 30 or more, at a temperature of 4° C. below clearing point of the medium,
• the display is addressed by an active matrix and wherein the mesogenic modulation medium comprises at least one compound of formula I
• in which
• R1 is n-alkyl or n-alkoxy, each having from 1 to 7 carbon atoms, or alkenyl, alkenyloxy, alkynyl car alkoxyalkyl, each having from 2 to 7 carbon atoms,
• are each, independently of one another,
• and one of
• is alternatively
• is alternatively
• is alternatively
• and, if present,
• is alternatively
• Z11 and Z12 are each, independently of one another, a single bond, —CO—O—, trans-CH═CH—, —CH═CF—, —CF═CH—, —CF═CF—, —CH═CH—CO—O—, —CF═CF—CO—O—, —CF═CH—CO—O, —CH═CF—CO—O—, —CF2—O—, —O—CF2— or —C≡C—,
• X1 is F, —OCF3, —CF3, —OCF2H, Cl, CN, —C≡C—CN or NCS, and
• n1 is 0 or 1,
• wherein when X1═F, the phenyl rings carry a total of at least 2 further F atoms, and
• wherein when X1═—OCF3, —CF3, —OCF2H or Cl, the phenyl rings carry a total of at least 1 further F atom.