Electrooptical liquid crystal system

Details Electrooptical liquid crystal system Electrooptical liquid crystal system

1995-06-07

1998-05-05

Wu, Shean C.

Compositions

Liquid crystal compositions

25229965, 25229966, 349 89, 349 92, 428 1, C09K 1952, G02F 113

Patent

active

057469385

ABSTRACT:
An electrooptical system is disclosed in which a PDLC film is positioned between 2 electrode layers. The PDLC film contains a liquid crystal mixture forming microdroplets in an optically isotropic, transparent polymer matrix. The liquid crystal mixture comprises one or more compounds of formula I ##STR1## wherein R, A.sup.1, A.sup.2, Z.sup.1, Z.sup.2, X.sup.1, X.sup.2, Q, Y and n are as herein defined, and one or more reactive liquid crystalline compounds. The PDLC film exhibits improved switching times, especially at low temperatures.

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