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
IMAI, M
NAITO, H
OKUDA, M
SUGIMURA, A
[J]. 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
IMAI, M
NAITO, H
OKUDA, M
SUGIMURA, A
[J]. 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
Iwata, Y
Naito, H
Inoue, M
Ichinose, H
Klasen-Memmer, M
Tarumi, K
[J]. 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
Iwata, Yosuke
Naito, Hiroyoshi
Inoue, Masaru
Ichinose, Hideo
Kiasen-Memmer, Melanie
Tarumi, Kazuaki
[J]. 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
Klasen, M
Bremer, M
Tarumi, K
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2000, 39 (11B): : L1180 - L1182
[10] Kleman M., 2003, SOFT MATTER PHYS INT

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