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作为开发液晶流动驱动的第一步,运用宏观ELP模型及Frank弹性理论对电场作用下液晶盒内向列相液晶的指向矢旋转与所引起的液晶流动之间的耦合机理进行了理论与实验研究。通过对液晶盒进行施加及撤销电场的操作,得到了液晶盒内瞬间液晶指向矢的旋转及所引起的液晶流动的变化情况。电场施加瞬间指向矢的旋转控制着流动的变化,二者同时达到最大值:指向矢旋转为350(°)/s,引流速度为30μm/s;而电场撤销的瞬间流动的变化控制着指向矢的旋转,流动特征与电场施加瞬间很相似,但持续时间很短。实验验证采用最直接的观察法,用显微镜自带CCD拍摄液晶盒在电场施加和解除过程中内部液晶引流发生的过程,通过图像分析得到实验数据,每个数据点分别通过取10次实验的平均值得到,实验结果与理论计算结果吻合。
As the first step in the development of liquid crystal mobility, theoretical and experimental studies on the coupling mechanism between the director rotation of liquid crystal in nematic nematic liquid crystal and the liquid crystal flow induced by the electric field are carried out using the macroscopic ELP model and Frank elasticity theory. The rotation of the liquid crystal director and the change of the liquid crystal flow caused by the instantaneous application of the liquid crystal cell and the withdrawal of the electric field are obtained. The rotation of the instantaneous director of the electric field controls the change of the flow, both reaching the maximum at the same time: the director rotation is 350 (°) / s and the drainage speed is 30μm / s; and the change of the instantaneous flow of the electric field control the director Of the rotation, the flow characteristics and electric field moment is very similar, but the duration is very short. Experimental verification using the most direct observation method, with a microscope with a CCD camera LCD cell in the process of electric field application and release of internal liquid crystal drainage process, the experimental data obtained by image analysis, each data point by taking 10 experiments average Worthwhile, the experimental results are in good agreement with the theoretical ones.