单块偏振片反射式向列相液晶显示器的理论设计与实验制造研究

反射式液晶显示器(RLCDs)具有亮度高、无视差等优点,并且结构简单,适合于现行的制造工艺和驱动方式.本文利用我们提出的参数空间法(偏振片角度、扭曲角及双折射率的函数)研究了适用于反射式液晶显示器,这种研究表明所有的反射式液晶显示模式都可以在这个参数空间里得以表述,如扭曲向列型的电控双折射模式(TN-ECB),混合场效应模式(HFE),混合向列型模式(MTN),以及自补偿向列型模式(SCTN).在此基础上我们提出几种新的反射模式,如反射向列型及反射超扭曲向列型(通过搜索参数空间得到),二者均适用于直视型和投影型显示方式.我们已制成反射向列型及反射超扭曲向列型样品,实验结果和理论设计符合一致.

DESIGN AND FABRICATION OF REFLECTIVE NEMATIC DISPLAYS WITH ONLY ONE POLARIZER

Reflective liquid crystal display (RLCDs) are characterized by high brightnessand free from viewing parallax.It also costs less material to construct and is compatible with existing manufacturing and driving practices.A parameter space for RLCD as a function of polarizer angle,liquid crystal twist angle and birefringence is constructed and discussed in this paper.It is shown that all published RLCD modes can be depicted in this parameter space,including the twisted-nematic-electrically controlled birefringence (TN-ECB) modes,the hybrid field effect (HFE) mode,the mixed-mode TN (MTN),and the self-compensated TN (SCTN) mode.Additionally it is shown several new RLCD modes,including the reflective TN (RTN) and the reflective STN (RSTN) which can be obtained from searching the parameter space systematically.All RLCD modes are related by a variation of the 3 LCD parameters.The RTN and RSTN modes have applications to both directive view and projection display systems.Sample RTN and RSTN displays were fabricated.Experimental results show good agreement with the theoretical design.