聚合物稳定蓝相液晶显示器存在驱动电压高和"磁滞效应"的缺点,是其应用之路上的难题.本文在深入研究蓝相液晶显示器中所使用的各种材料介电常数的基础上,结合电动力学中电介质中的电场和电位移之间关系的知识,解释了蓝相液晶显示器驱动电压高的原因为聚合物材料和绝缘层材料的介电常数远低于蓝相液晶材料的介电常数.研究中发现提高聚合物材料和绝缘层材料的介电常数,将会明显降低聚合物蓝相液晶显示器驱动电压.理论和模拟结果表明:当聚合物材料和绝缘层的介电常数达到蓝相液晶的平均介电常数,该聚合物稳定蓝相液晶显示器的驱动电压降低一半.研究结果将对聚合物稳定蓝相液晶显示器的产业化应用起到促进作用.
Polymer stabilized blue phase liquid crystal display (PS-BPLCD) is difficult to be used in production because of its high operating voltage and hysteresis effect.In this paper, we analyzed the reason of the high operating voltage of BPLCD based on the relationship between the electric field and electric displacement in electrodynamics and the dielectric constants of every material used in BPLCD.The reason is that the dielectric constant of polymer and insulator layer's material is far less than that of blue phase liquid crystal.The operating voltage of PS-BPLCD can be obviously reduced by increasing the dielectric constant of polymer and insulator layer's material.The results show that the operating voltage is reduced to the half when the dielectric constants of polymer and insulator layer's material reach the average dielectric constant of liquid crystal.These results have promotion effect in the industrialization of PS-BPLCD.
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