Effects of viscosities on the transient current in homeotropic nematic liquid crystal cells

被引：5

作者：

Iwata, Yosuke ^{[1
]}

Naito, Hiroyoshi ^{[1
,2
]}

Inoue, Masaru ^{[3
]}

Ichinose, Hideo ^{[4
]}

Klasen-Memmer, Melanie ^{[5
]}

Tarumi, Kazuaki ^{[5
]}

机构：

[1] Osaka Prefecture Univ, Dept Phys & Elect, Naka Ku, Sakai, Osaka 5998531, Japan

[2] Osaka Prefecture Univ, Res Inst Mol Elect Devises, Naka Ku, Sakai, Osaka 5998531, Japan

[3] TOYO Corp, FPD Measurement Syst Project, Chuo Ku, Tokyo 1038284, Japan

[4] Merck Ltd, Liquid Crystal Div, Kanagawa 2430303, Japan

[5] Merck KGaA, Liquid Crystal Div, D-64293 Darmstadt, Germany

来源：

THIN SOLID FILMS | 2008年 / 517卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Nematic liquid crystal; Viscosities; Negative dielectric anisotropy; Transient current; Flow effects;

D O I：

10.1016/j.tsf.2008.09.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of the Leslie viscosity coefficients alpha(i) (i=1, 2, ..., 5) of nematic liquid crystals (NLCs) with negative dielectric anisotropy (Delta epsilon<0) on the electric-field-induced director reorientation in homeotropic NLC cells have been studied from the analysis of the transient current induced by step voltage application. The transient current in a homeotropic NLC cell with Delta epsilon<0 was well reproduced by computer simulation, based on the theory of NLCs in which the flow effects and the free-slip boundary condition are taken into account. It is found that the response time of vertical alignment NLC displays is dominantly governed by alpha(2) and alpha(4) + alpha(5) of NLCs with Delta epsilon<0. (C) 2008 Elsevier B.V. All rights reserved

引用

页码：1417 / 1420

页数：4

共 13 条

[1]

Blinov L. M., 1994, ELECTROOPTIC EFFECTS

[2]

Chandrasekhar S., 1992, Liquid Crystals, V2nd ed.

[3]

de Gennes PG., 1994, The physics of liquid crystals

[4]

ERICKSEN JL, 1960, ARCH RATION MECH AN, V4, P231

[5] METHOD FOR DETERMINATION OF ROTATIONAL VISCOSITY IN NEMATIC LIQUID-CRYSTALS [J].

IMAI, M ;

NAITO, H ;

OKUDA, M ;

SUGIMURA, A .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1994, 33 (1B) :L119-L121

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

IMAI, M ;

NAITO, H ;

OKUDA, M ;

SUGIMURA, A .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1995, 34 (6A) :3170-3176

[7] Transient current of nematic liquid crystals with negative dielectric anisotropy induced by step-voltage excitation [J].

Iwata, Y ;

Naito, H ;

Inoue, M ;

Ichinose, H ;

Klasen-Memmer, M ;

Tarumi, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2004, 43 (12B) :L1588-L1591

[8] Effects of Fluid Flow on Electric-Field-Induced Director Reorientation in Homogeneous and Homeotropic Nematic Liquid Crystal Cells, Probed by Transient Current Measurements [J].

Iwata, Yosuke ;

Naito, Hiroyoshi ;

Inoue, Masaru ;

Ichinose, Hideo ;

Kiasen-Memmer, Melanie ;

Tarumi, Kazuaki .

JAPANESE JOURNAL OF APPLIED PHYSICS, 2008, 47 (10) :8230-8235

[9] New liquid-crystal materials for active matrix displays with negative dielectric anisotropy and low rotational viscosity [J].

Klasen, M ;

Bremer, M ;

Tarumi, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2000, 39 (11B) :L1180-L1182

[10]

Kleman M., 2003, SOFT MATTER PHYS INT

← 1 2 →