RESPONSE-TIMES AND VOLTAGES FOR PDLC LIGHT SHUTTERS
RESPONSE-TIMES AND VOLTAGES FOR PDLC LIGHT SHUTTERS
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DOI：
10.1080/02678298908027783
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发表时间：
1989-01-01
期刊：
影响因子：
2.2
通讯作者：
DOANE, JW
中科院分区：
文献类型：
--
作者：
WU, BG;ERDMANN, JH;DOANE, JW
对聚合物分散液晶（PDLCs）光闸的响应时间和工作电压进行了实验研究，并与基于非球形微滴模型的计算结果进行了比较。实验在具有细长且均匀排列的液滴的光闸上进行，其中测量弛豫时间和电压响应。结果表明，液滴的形状可以是一个主导因素，特别是对于松弛时间，和数据进行了比较与方程中推导出的液滴的纵横比l = a/B，其中和裸的半长轴和半短轴的长度，分别延长液滴。它进一步表明，液滴内的电场可以大大小于所施加的字段，由于聚合物和液晶材料的导电性和介电性能。这些数据用于获得聚合物粘合剂和液晶液滴的电导率之比的值，以及液晶中电导率的各向异性。
The response times and operating voltages of light shutters formed from polymer dispersed liquid crystals (PDLCs) have been studied experimentally and the results compared with calculations based on non-sperhically shaped nematic droplet models. The experiments were performed on light shutters with elongated and uniformly aligned droplets where the relaxation time and voltage response were measured. It is shown that the droplet shape can be a dominant factor, particularly for the relaxation time, and the data are compared with equations derived in terms of the aspect ratio of the dropletl = a/b, whereaandbare the lengths of the semi-major and semi-minor axes, respectively, of the elongated droplet. It is further demonstrated that the electric field inside the droplet can be considerably smaller than the applied field, due to the conductivity and dielectric properties of the polymer and liquid crystal materials. These data are used to obtain values for the ratio of the conductivities of the polymer binder and liquid crystal droplet, as well as the anisotropy of the conductivity in the liquid crystal.