Surface electric-field-induced instabilities in a homeotropically oriented nematic liquid crystal sample

2000 ◽  
Vol 3 (2) ◽  
pp. 123-130 ◽  
Author(s):  
H.A. Pereira ◽  
L.R. Evangelista
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Crystal Sample ◽  
Surface Electric Field

LIQUID CRYSTLASLIGHT SCATTERING BY FLUCTUATIONS INDUCED BY AN APPLIED ELECTRIC FIELD IN A NEMATIC LIQUID CRYSTAL (APAPA)

1972 ◽  
Vol 33 (C1) ◽  
pp. C1-63-C1-67 ◽  
Author(s):  
M. BERTOLOTTI ◽  
B. DAINO ◽  
P. Di PORTO ◽  
F. SCUDIERI ◽  
D. SETTE
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Applied Electric Field

scholarly journals Modeling Static Electric Field Effect on Nematic Liquid Crystal Director Orientation in Side-Electrode Cell

2018 ◽  
Vol 173 ◽  
pp. 03002 ◽  
Author(s):  
Alexander Ayriyan ◽  
Edik Ayryan ◽  
Alexandre Egorov ◽  
Maria Dencheva-Zarkova ◽  
Georgi Hadjichristov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Finite Difference Methods ◽  
Electric Field Effect ◽  
Dimensional Model ◽  
Static Electric Field ◽  
Electrode Cell ◽  
Field Influence ◽  
Director Orientation

A two-dimensional model of Fredericks effect was used for the investigation of the static electric field influence on nematic liquid crystal director orientation in the side-electrode cell. The solutions of the equations describing the model were obtained by finite-difference methods. Fredericks transition threshold for the central part of the cell, as well as dependencies of the distribution of the director orientation patterns on the electric field and location, were obtained. The numerical results are found to agree qualitatively with the experiment. Further investigations are needed to elucidate completely the Fredericks effect.

Wide-Viewing-Angle Hybrid Aligned Nematic Liquid Crystal Cell Controlled by Complex Electric Field

2002 ◽  
Vol 41 (Part 1, No. 7A) ◽  
pp. 4571-4576 ◽  
Author(s):  
Seung Ho Hong ◽  
Hyang Yul Kim ◽  
Jae-Hyung Kim ◽  
Sang-Hee Nam ◽  
Myong-Hoon Lee ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Liquid Crystal Cell ◽  
Viewing Angle ◽  
Crystal Cell ◽  
Wide Viewing Angle ◽  
Complex Electric Field

CARS Microscopic Observation of a Nematic Liquid Crystal Droplet in an Electric Field

2013 ◽  
Vol 63 (4) ◽  
pp. 466-472
Author(s):  
Jin-Soon PARK* ◽  
Jong-Hyun KIM ◽  
Eun Seong LEE ◽  
Ju Hyun PARK ◽  
Satoshi KAWATA
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Microscopic Observation ◽  
Liquid Crystal Droplet

Bistable nematic liquid crystal device with flexoelectric switching

2006 ◽  
Vol 17 (4) ◽  
pp. 435-463 ◽  
Author(s):  
L. J. CUMMINGS ◽  
G. RICHARDSON
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Liquid Crystal Display ◽  
Parallel Plates ◽  
Stable States ◽  
Numerical Work ◽  
Potential Applications ◽  
Simplifying Assumptions ◽  
Bistable Device

Motivated generally by potential applications in the liquid crystal display industry [8,35], and specifically by recent experimental, theoretical and numerical work [6,7,13,14,21,25,30,31], we consider a thin film of nematic liquid crystal (NLC), sandwiched between two parallel plates. Under certain simplifying assumptions, laid out in £2, we find that for monostable surfaces (i.e. only a single preferred director anchoring angle at each surface), two optically-distinct, steady, stable (equal energy) configurations of the director are achievable, that is, a bistable device. Moreover, it is found that the stability of both of these steady states may be destroyed by the application of a sufficiently large electric field, and that switching between the two states is possible, via the flexoelectric effect. Such a phenomenon could be used in NLC display devices, to reduce power consumption drastically. Previous theoretical demonstrations of such (switchable) bistable devices have either relied on having bistable bounding surfaces, that is, surfaces at which there are two preferred director orientations at the surface [7,14]; on having special (nonplanar) surface morphology within the cell that allows for two stable states (the zenithal bistable device (ZBD) [4,21], or, in the case of the Nemoptic BiNem technology [11,19], on flow effects and a very carefully applied electric field to effect the switching.

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