A METHOD FOR DETERMINATION OF ROTATIONAL VISCOSITY AND PRETILT ANGLE FROM TRANSIENT CURRENT IN TWISTED NEMATIC LIQUID-CRYSTAL CELLS

Authors
IMAI M NAITO H OKUDA M SUGIMURA A
Citation
M. Imai et al., A METHOD FOR DETERMINATION OF ROTATIONAL VISCOSITY AND PRETILT ANGLE FROM TRANSIENT CURRENT IN TWISTED NEMATIC LIQUID-CRYSTAL CELLS, JPN J A P 1, 34(6A), 1995, pp. 3170-3176
Citations number
24
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS → ACNP
Volume
34
Issue
6A
Year of publication
1995
Pages
3170 - 3176
Database
ISI
Abstract
A method for the determination of rotational viscosity gamma(1) and pr etilt angle theta(o) in twisted nematic liquid crystal cells is propos ed. The method is based on the analysis of transient current of a cell excited by a de voltage pulse. The accuracy of gamma(1) and theta(o) values determined by the method is demonstrated by means of numerical calculation of exact basic equations. Experimental results for a ZLI22 93 (Merck) cell are presented, and the gamma(1) values obtained are fo und to be in excellent agreement with values in the literature.