The effect of driving waveform, reflective vs backlit transmissive mode, and contrast polarity, on the legibility of a multiplexed twisted nematic (TN) LCD were investigated. The backlit transmissive mode with a white display pattern on dark background (W/B contrast) resulted in superior display legibility, while the reflective mode TN LCD with a dark display pattern on white background (B/W contrast) resulted in the second best legibility. The maximum legibility was obtained at a lower operating voltage for the LCD with W/B contrast compared with the B/W contrast; we believe this can be attributed to the nonlinear response of the human eye.
© 1987 Optical Society of America
Hiroshi Kubota, Takeshi Marushige, Takahiko Takabayashi, Teruo Shimomura, and Shunsuke Kobayashi, "Legibility study of multiplexed twisted nematic LCDs based on colorimetry and matching tests," Appl. Opt. 26, 1709-1713 (1987)