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Please use this identifier to cite or link to this item: http://elib.bsu.by/handle/123456789/170204
Title: Fast-switching effect using viscous chiral-nematic materials
Authors: Lapanik, Valeri
Timofeev, Sergei
Sasnouski, Genadz
Bezborodov, Vladimir
Haase, Wolfgang
Keywords: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Issue Date: 2016
Publisher: Taylor & Francis Group
Citation: Liquid Crystals. - 2016.
Abstract: We report on chiral-nematic mixtures containing viscous chiral dopants, composed of rigid rod-like chiral molecules, in order to solve the problem of backflow in the middle layers of the liquid crystal cells. During the study, the viscoelastic properties of the liquid crystal compositions have been optimised, as well as the helical twisting power of the chiral compounds, the anchoring energy and the pre-tilt angle of alignment materials, the ratio between the cell gap and the helical pitch (d/P0). After optimisation, we prepared test cells with low operating voltage – from 1.5 till 5.0 V, fast response time (τon+ τoff) – less than 1 ms, wide operating temperature range from −40°C till +100°C, and good thermal stability. It should be noted that the response time of the new electro-optical mode does not strongly depend on the cell gap, which is in contrast to other known operating modes. We have achieved rather linear than quadratic dependence of the response time when changing the thickness of the cell
URI: http://elib.bsu.by/handle/123456789/170204
ISSN: 0267-8292; 1366-5855 (online)
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