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Molecular Crystals and Liquid Crystals Volume 477, 2007 - Issue 1
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Dynamics

Viscosity Response Measurement of Nematic Liquid Crystal under Application of Electric Field Using Shear Horizontal Wave

Masashi Aoki Department of Electrical and Electronic Engineering, National Defense Academy, Yokosuka, Kanagawa, Japan
,
Ryotaro Ozaki Department of Electrical and Electronic Engineering, National Defense Academy, Yokosuka, Kanagawa, JapanCorrespondence[email protected]
,
Hiroshi Moritake Department of Electrical and Electronic Engineering, National Defense Academy, Yokosuka, Kanagawa, Japan
,
Katsumi Yoshino Research Project Promotion Institute, Shimane University, Matsue, Shimane, Japan
&
Kohji Toda Mechanical System Engineering, Faculty of Engineering, Musashi Institute of Technology, Tamazutsumi, Tokyo, Japan
Pages 113/[607]-124/[618] | Published online: 22 Sep 2010
 
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Abstract

The Propagation characteristics of a shear horizontal (SH) wave in a trilayer structure having a viscous fluid layer is analyzed from a numerical analysis. Acoustic phase changes under application of electric fields in a nematic liquid crystal cell are measured using the SH wave. The acoustic phase advances with increasing the applied electric field. This result corresponds with the viscosity change based on a molecular reorientation of the liquid crystal. In dynamic response measurement, the response times in the phase and the optical measurements are different, because the measured area of the acoustic phase is only the vicinity of the glass surface.

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