Liquid crystal mixture

Details Liquid crystal mixture Liquid crystal mixture

1982-06-10

1984-07-17

Gron, Teddy S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

2522996, 25229961, 25229963, 25229964, 25229965, 25229966, 260465D, 260465F, 260465G, 260465H, 350350R, 350350S, 350346, 544335, C09K 334, G02F 113, G09F 935, C07C12160, C07D23960

Patent

active

044607709

ABSTRACT:
There is described a liquid crystalline mixture for electro-optical devices which are operated according to the two-frequency matrix addressing procedure. The mixture consists of three components A, B and C, each of which contains one or more compounds. Component A has a viscosity of at most about 40 cp, a clearing point of at least about 40.degree. C. and a dielectric anisotropy between about -2 and about +1. Component B has a dielectric anisotropy below about -2 and component C has a dielectric anisotropy above about +10, a clearing point of at least about 100.degree. C. and there is a cross-over frequency in the total mixture of at most about 15 kHz at 20.degree. C.
Novel compounds for such mixtures and their manufacture and use are also described.
The novel mixtures make possible especially high multiplex rates and short response times.

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