摘要：

1. The use of perylene derivatives of the general formula see diagramm : EP0081143,P5,F1 where Hal is chlorine or bromine, or chlorine and bromine, n is 2 to 14, and the pair of A's in the 3- and 4-positions and the pair of A's in the 9- and 10-positions are each a group of the formula II or III see diagramm : EP0081143,P5,F2 or see diagramm : EP0081143,P5,F3 and R**3 and R**4 are each hydrogen or one of the radicals R**3 or R**4 is alkyl of 1 to 12 carbon atoms, cyclohexyl, chlorine or bromine, in electrooptical displays containing liquid crystals.

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