Lin Chi-Huang
Department of Physics, National Sun Yat-Sen University, Kaohsiung, Taiwan 80424, Republic of China.
Opt Express. 2008 Aug 18;16(17):13276-86. doi: 10.1364/oe.16.013276.
An optical compensation principle of the crossed circular polarizers is developed to widen the viewing angle of high-transmittance multi-domain vertical-alignment liquid crystal displays (MVA-LCDs). The optical properties of a biaxial film are analyzed by the Berreman 4x4 matrix method, and the analytical solution for the slow-axis orientation of a biaxial film is calculated to obtain the compensation principle of the crossed circular polarizers. Based on this compensation principle, the high-transmittance MVA-LCD theoretically has a complete 80 degrees viewing cone for contrast ratio (CR)>100:1 and experimental results reveal that the compensated high-transmittance MVA-LCD can achieve a viewing angle of over the entire 80 degrees viewing cone for CR>20:1. Practical application as a mobile display is emphasized.
为拓宽高透过率多畴垂直取向液晶显示器（MVA-LCD）的视角，提出了一种交叉圆偏振器的光学补偿原理。采用Berreman 4x4矩阵法分析了双轴薄膜的光学特性，并计算了双轴薄膜慢轴取向的解析解，以获得交叉圆偏振器的补偿原理。基于该补偿原理，理论上高透过率MVA-LCD在对比度（CR）>100:1时有完整的80度视角锥，实验结果表明，补偿后的高透过率MVA-LCD在CR>20:1时可实现超过整个80度视角锥的视角。文中强调了其作为移动显示器的实际应用。
