Dopant-induced contrast enhancement of vertically aligned liquid crystal cells

Author

Wen, Chien-Hui ; Wu, Benjamin ; Gauza, Sebastian ; Wu, Shin-Tson

Author_Institution

Coll. of Opt. & Photonics, Univ. of Central Florida, Orlando, FL, USA

Volume

1

Issue

2

fYear

2005

Firstpage

234

Lastpage

239

Abstract

A simple method is developed for aligning the laterally difluorinated high birefringence liquid crystal (LC) compounds and mixtures in a homeotropic cell. Adding a few percent positive dielectric anisotropic or nonpolar LC material not only enhances the contrast ratio but also improves the overall figure-of-merit. Several negative LC compounds with a wide variation of birefringence are used to investigate this phenomenon. Molecular modeling and experimentation are demonstrated to support this concept.

Keywords

birefringence; dielectric materials; image enhancement; liquid crystal displays; conjugation length; dopant-induced contrast enhancement; fast response time; figure-of-merit improvement; high birefringence liquid crystal; high contrast; homeotropic alignment; molecular modeling; negative dielectric anisotropic liquid crystal; nonpolar LC material; vertically aligned liquid crystal cells; Anisotropic magnetoresistance; Birefringence; Delay; Dielectric liquids; Dielectric materials; Liquid crystal displays; Liquid crystals; Polyimides; Temperature; Viscosity; Birefringence; conjugation length; fast response time; high contrast; homeotropic alignment; negative dielectric anisotropic liquid crystal (LC); vertical alignment;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2005.858916

Filename

1545787