Browse Prior Art Database

Dyes for Guest Host Liquid Crystal Displays

IP.com Disclosure Number: IPCOM000052039D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Clecak, NJ: AUTHOR [+2]

Abstract

We have prepared dyes based on the 2,6 benzylidene-4-methylcyclohexanon system and found them to meet the requirements for use in guest-host liquid crystal displays. The general structure of these dyes is shown below. See Original.

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Dyes for Guest Host Liquid Crystal Displays

We have prepared dyes based on the 2,6 benzylidene-4- methylcyclohexanon system and found them to meet the requirements for use in guest-host liquid crystal displays. The general structure of these dyes is shown below. See Original.

Two examples were prepared. In one R=NO(2), and in the other See Original.

Either of these compounds dissolves readily in a commercial nematic mixture (E-7), and when this solution is put into a 10-micron cell, equipped with transparent electrodes, it aligns readily in a direction parallel to the alignment direction of the liquid crystal. The absorption spectrum of such a cell shows a strong peak at 430 mu.

On the application of 10 volts (60 Hz) across the cell, the yellow color due to this absorption disappears. A calculation shows this transition to have an order parameter of about 0.7.

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