Liquid-crystalline medium and liquid-crystal display

A liquid-crystalline medium, comprising

• one or more dielectrically positive compounds of formula IA,
• one or more dielectrically positive compounds of formula IB,
• one or more dielectrically positive compounds of formula IC, and
• one or more dielectrically neutral compounds of formula V
• in which
• R1 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms,
• independently of one another, denote
• independently of one another, denote
• Z11 to Z16, independently of one another, denote —CH2CH2—, —CF2CF2—, —COO—, trans-CH═CH—, trans-CF═CF—, —C≡C—, —CH2O—, —CF2O— or a single bond,
• L11 and L12, independently of one another, denote H, F or Cl,
• X1 denotes H or F,
• Y1 denotes CH2 or O,
• R51 and R52, independently of one another, denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms,
• on each occurrence, independently of one another, denotes
• Z51 and Z52, independently of one another and, if Z51 occurs twice, also these independently of one another, denote —CH2CH2—, —COO—, trans-CH═CH—, trans-CF═CF—, —CH5O—, —CF2O— or a single bond, and
• r denotes 0, 1 or 2.