Development to a Double-Layr Electrically Controlled Birefringence Liquid-Crystal Display with a Wide-Viewing-Angle cone

液晶显示器（LCD）被认为是下一代的主要平板显示技术之一。然而，对于许多类型的LCD来说，窄视角锥是获得高质量显示器的限制因素之一。为了解决这一问题，本文进行了以下研究，并确定了目标.窄视锥是液晶分子双折射各向异性的结果。提出了一种新型的双层电控双折射型液晶显示器（DECB），并从理论上阐明了光学补偿的最佳设计条件.在理论分析的基础上，对D-ECB盒的电光特性进行了实验研究。阐明了D-ECB单元极大地扩展了视角锥. D-ECB的光学补偿仅在施加一定电压时发生。研究了薄膜补偿D-ECB在关断状态下的补偿特性。实验结果表明，在关闭状态下，实现了宽视锥.全面考察了薄膜补偿D-ECB的最佳条件，以实现具有宽视角锥的器件，证实了本研究提出的薄膜补偿电控双折射液晶显示器将使通过堆叠光学补偿介质来制造宽视角锥LCD成为可能。

Liquid crystal displays (LCDs) are considered one of the main flat-panel-display technology for the next generation. However, a narrow viewing-angle cone for many types of LCDs is one of the limiting factors in obtaining high-quality displays. For solving this problem, the following investigation has been made and the target has been achieved.1. The narrow viewing cone is the result of the anisotropy of birefringence of liquid-crystal molecules. In this research, a novel double-layr electrically controlled birefringence-model LCD (DECB) was proposed and the optimum design condition for the optical compensation was clarified theoretically.2. Based on the theoretical results, the electro-optical properties of the D-ECB cell was investigated experimentally. It was clarified that the D-ECB cell expanded the viewing-angle cone extremely.3. The optical compensation of the D-ECB occurs only when certain voltages are applied. The film compensated D-ECB was investigated for the compensation in off state. As the results, it realized a wide cone of view in off state.4. The optimum condition of the film compensated D-ECB was totally examined in order to realize the device with a wide viewing-angle cone.It is confirmed that the film compensated electrically controlled birefringence liquid crystal display proposed in this research will make it possible to fabricate wide-viewing angle cone LCDs by stacking an optical compensation media.