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

液晶显示器(LCD)被认为是下一代平板显示的主要技术之一。然而，对于许多类型的LCD来说，窄视角锥体是获得高质量显示器的限制因素之一。为了解决这一问题，进行了以下调查，并达到了目标。窄视锥是液晶分子双折射各向异性的结果。本文的主要研究内容如下：1.提出了一种新型双层电控双折射液晶显示器(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电池的电光特性进行了实验研究。结果表明，D-ECB细胞极大地扩大了视角锥体。只有在施加一定电压时，D-ECB的光学补偿才会发生。研究了薄膜补偿的D-ECB在关态下的补偿。实现了关机状态下的宽视锥视场。为了实现宽视角锥体液晶显示器件，对薄膜补偿D-ECB的最佳工艺条件进行了全面的考察，证实了本研究提出的薄膜补偿电控双折射液晶显示器可以通过叠加光学补偿介质来制作大视角锥体液晶显示器。

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.