Study on New Chiral Pitch Measurement Method using Amorphous-alignment Structure

Abstract

A TN-LCD is one of major display modes for small-size LCD monitors. In the LCD, an appropriate amount of a chiral material doped into a liquid crystal medium is an important factor to determine the performance of the display mode. Until now, several methods have been proposed, but the methods have inherent problems to use. In this study, we have proposed a new method to measure the twist angle of LC medium having amorphous-alignment structure and demonstrate the usefulness the method by showing the experimental results of the chiral twisting power of two chiral dopants.