Browse Prior Art Database

Liquid Crystals

IP.com Disclosure Number: IPCOM000081391D
Original Publication Date: 1974-May-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 19K

Publishing Venue

IBM

Related People

Sprokel, GJ: AUTHOR

Abstract

A nematic liquid crystal composition for an optical display comprises a nematic material having dissolved therein an additive of the form (C(6)H(5)-CH(2))(2)(R)(2)N/+/X/-/ where R is a methyl or ethyl radical and X/-/ is Cl/-/, Br/-/ or I/-/.

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Liquid Crystals

A nematic liquid crystal composition for an optical display comprises a nematic material having dissolved therein an additive of the form (C(6)H(5)- CH(2))(2)(R)(2)N/+/X/-/ where R is a methyl or ethyl radical and X/-/ is Cl/-/, Br/-/ or I/-/.

The nematic material is preferably one having a negative dielectric anisotropy, and the effect of the additive is to lower the resistivity, and, therefore, the response time of the liquid crystals.

The additive is preferably dibenzyl-dimethyl ammonium chloride or dibenzyl- diethyl ammonium chloride, and is present in the nematic material in the range
0.56 - 10.9 x 10/-6/ mol/ml.

The nematic material is preferably p-methoxy-benzylidene p-butylaniline, or a mixture of p-methoxy-benzylidene p-butylaniline and p-ethoxy-benzylidene p- butylaniline.

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