单倍盒厚间距垂直排列和混合排列半透半反式液晶显示模式

Single Cell Gap Vertical Alignment and Hybrid Alignment Transflective Liquid Crystal Display

提出了一种采用垂直排列模式与混合排列模式相搭配的单倍盒间距的半透半反式液晶显示模式,液晶材料为负性。基于液晶分子的初始取向,反射区为混合排列模式,其关态和开态有效相位延迟在π/2和π之间变化;透射区为平行排列模式,其关态和开态有效相位延迟在0和π之间变化。采用半波延迟膜补偿的方法可以使器件工作于常黑模式。对于透射区下层偏振片吸收轴和上层偏振片吸收轴分别平行和垂直放置时,下层的半波延迟膜光轴的方位角不同,导致光谱响应曲线和视角锥对比度分布不同。用扩展琼斯矩阵方法模拟分析了这两种器件结构的电光响应及光谱响应特性以及视角锥对比度分布特性。

In order to obtain high transmission and reflection of liquid crystal display （LCD） simultaneously, this paper proposed a single-cell-gap transflective LCD with dual orientation of LC at an initial state, which adopted negative liquid crystal material. The liquid crystal director in the pixel of reflective re- gion was hybrid aligned, with its effect phase retardation changed from π/2 to n, and in the other pixel of transmissive region was homogenously aligned, with its effect phase retardation changes from 0 to π. The transmissive region was divided into two mode based on whether the adsorption axis of the top polarizer and the bottom polarizer were parallel or perpendicular, the optical axis orientation of the bottom half wave film was difference in the two mode. The character of voltage/wavelength dependent normalized light efficiency and that of the iso-contrast contour dependent on the viewing angle at an incident wavelength of 550 nm was calculated by the extended Jones matrix method for the two difference mode.