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Effect of material properties on reverse flow in nematic liquid crystal devices with homeotropic alignment

Vanbrabant, PJM; Beeckman, J; Neyts, K; James, R; Fernandez, FA; (2009) Effect of material properties on reverse flow in nematic liquid crystal devices with homeotropic alignment. APPL PHYS LETT , 95 (15) , Article 151108. 10.1063/1.3242018.

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Abstract

Reverse flow is undesirable in liquid crystal devices with vertical alignment. The influence of the material properties on the onset of backflow is investigated for commercially available negative dielectric liquid crystals. It is shown that the threshold voltage V-BF for the occurrence of backflow is an important material characteristic. This threshold is relevant for applications and a large value is desired in devices to avoid backflow while keeping a wide applicable voltage range. Accurate finite element simulation of the liquid crystal hydrodynamics allows extraction of V-BF and the unknown Miesowicz coefficients eta(ij). The resulting values are tabulated at 20.0 degrees C. (C) 2009 American Institute of Physics. [doi:10.1063/1.3242018]

Type:Article
Title:Effect of material properties on reverse flow in nematic liquid crystal devices with homeotropic alignment
DOI:10.1063/1.3242018
Keywords:DYNAMIC-BEHAVIOR, COEFFICIENTS, DEFORMATION, ORIENTATION, EQUATIONS, FIELDS, MBBA
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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