Configuration optimization of a reflective bistable-twisted-nematic cell for high-contrast operation

In this study, the configuration of a reflective bistable-twisted-nematic ( BTN) liquid-crystal cell is optimized for high contrast and high brightness operation. We searched for the optimum optical parameters of a reflective BTN cell by calculating its optical performances at three wavelengths; red, green, and blue. By studying the effect of each optical parameter on the o ptical performances, we found that the angle of the polarizer is more impor tant than any other optical parameter in the design of a reflective BTN cel l. We fabricated a reflective BTN cell with a wide-band retardation film, w hose measured contrast ratio is 10.6 : 1.