Advantageous voltage-holding ratio characteristics induced by in-plane electric fields, and the optimization concept of liquid crystals for an in-plane switching electro-optical effect
Advantageous voltage-holding ratio characteristics induced by in-plane electric fields, and the optimization concept of liquid crystals for an in-plane switching electro-optical effect
复制标题
面内电场诱导的有利电压保持比特性以及面内切换电光效应的液晶优化概念
DOI：
10.1080/026782998205714
复制
发表时间：
1998
期刊：
影响因子：
2.2
通讯作者：
M. Oh
中科院分区：
文献类型：
--
作者：
M. Oh
液晶的面内开关（IPS）显示出有利的电压保持比（VHR）特性，使得具有低电阻率的液晶可以提供与扭曲的双折射效应相比更高的VHR。当使用IPS电光效应近似平行于衬底平面施加电场时，获得该实验结果。我们发现，面内电场产生辅助电容，其支持在有源矩阵驱动方案的非选择周期期间在液晶层上保持外部施加的电压，因为液晶层可以与绝缘层、取向层甚至基板并联连接。基于这些有利的VHR特性，适当地优化适合于IPS效应的液晶材料。我们建议的评估参数，来自液晶的物理开关原理，以获得更低的驱动电压和更快的分辨率。
In-plane switching (IPS) of liquid crystals showed advantageous voltage-holding ratio (VHR) characteristics so that liquid crystals with low resistivity could provide higher VHRs compared with the twisted nematic effect. This experimental result was obtained when electric fields were applied approximately parallel to the substrate plane using the IPS electro-optical effect. We found that the in-plane electric field generates supplementary capacities which support retention of an externally applied voltage over the liquid crystal layer during non-selected periods of the active matrix driving scheme, because the liquid crystal layer can be connected with an insulating layer, an orientation layer and even a substrate in parallel. Based on these advantageous VHR characteristics, liquid crystal materials suitable for the IPS effect were appropriately optimized. We propose evaluation parameters, derived from the physical switching principles of the liquid crystals, to obtain lower driving voltage and faster res...