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向列相液晶电流体不稳定性——偏置电场效应

王心宜 林磊

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向列相液晶电流体不稳定性——偏置电场效应

王心宜, 林磊

ELECTROHYDRODYNAMIC INSTABILITIES OF NEMATIC LIQUID CRYSTALS——EFFECT OF AN INCLINED ELECTRIC FIELD

WANG XIN-YI, LIN LEI
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  • 本文考虑了外电场与液晶盒玻璃片法线成倾角θ0时,沿面排列的向列相液晶(θαα>0)的电流体不稳定性现象。在Dubois-Violette等人的一维理论的基础上,我们获得了直流、正弦波和矩形波三种电场激发下的失稳条件。重要结果包括:(1)电荷弛豫时间随θ0单调上升。(2)对于MBBA液晶,存在一个临界角θc(ω)(ω是外场频率),当θ0>θc(ω)
    Electrohydrodynamic instabilities of a planar nematic liquid crystal (εαα>0) under an inclined electric field (at an angle θ0 with the normal of the glass plates of the cell) are considered. On the basis of the one-dimensional theory of Dubois-Violette et al, conditions for the onset of instabilities under the excitation of static, sinusoidal and square wave electric Fields, respectively, are obtained. Major results include: (1) Relaxation time of charge increases monotonically with θ0. (2) For MBBA, there exists a critical angle θc(ω)(ω is frequency of external field), when θ0> θc(ω) instability cannot occur. θc(0) =54.2°. (3) For MBBA, threshold voltage is a monotonic increasing function of θ0.
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出版历程
  • 收稿日期:  1982-07-20
  • 刊出日期:  1983-06-05

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