Transient dielectric study of bistable reflective cholesteric displays and design of rapid drive scheme
- 28 August 1995
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 67 (9) , 1211-1213
- https://doi.org/10.1063/1.115010
Abstract
Transient dielectric measurement is used to study the transitions among the planar, focal conic, and homeotropic states of cholesteric liquid crystals. If the initial state is the field-induced homeotropic state, at low bias fields, the liquid crystal transforms to the planar state in a sequence of homeotropic-transient planar–planar; at high bias fields, the liquid crystal transforms to the focal conic state. The homeotropic-transient planar transition is on the order of 1 ms while the homeotropic-focal conic transition is on the order of 100 ms. Large hysteresis is observed in the transitions between the homeotropic and the focal conic state. Based on the rapid homeotropic-transient planar transition and the hysteresis effect in the focal conic-homeotropic transition, we have designed a drive scheme which can address bistable reflective cholesteric displays at the speed of one line per millisecond.Keywords
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