Switch element comprising a liquid-crystalline medium

Switch element, characterised in that it is thermoresponsive and that it switches between a less transmissive state for radiant energy and a more transmissive state for radiant energy, comprising a liquid-crystalline medium, which comprises one or more compounds of the formula (I)

• where
• R11,R12 are on each occurrence, identically or differently, F, Cl, CN, NCS, R1—O—CO—, R1—CO—O—, an alkyl, alkoxy or thioalkoxy group having 1 to 10 C atoms, or an alkenyl, alkenyloxy or thioalkenyloxy group having 2 to 10 C atoms, or a monocyclic, bicyclic or tricyclic cycloalkyl or cycloalkenyl group having 3 to 10 C atoms, where one or more H atoms in the groups mentioned above may be replaced by F, Cl, CN, and where one or more CH2 groups in the groups mentioned above may be replaced by O, S, —O—CO— or —CO—O—;
• and where
• R1 is, identically or differently on each occurrence, an alkyl or an alkenyl group having 1 to 10 C atoms, in which one or more H atoms may be replaced by F or Cl;
• and
• is selected from
• is selected from
• and
• X is on each occurrence, identically or differently, F, Cl, CN or an alkyl, alkoxy or thioalkoxy group having 1 to 10 C atoms, where one or more H atoms in the groups mentioned above may be replaced by F or Cl and where one or more CH2 groups may be replaced by O or S;
• and
• Z11 is selected from —CF2O—, —OCF2—, —CH2CH2—, —CF2CF2—, —OCH2—, —CH2O—, —O—, and a single bond.