The matrix methods are extended to calculate the optical behaviors of reflective liquid-crystal displays with asymmetric incident and exit angles. Both the unfolding method and the backward-eigenwave method are employed to derive the matrix representations. The simulation results for symmetric incident and exit angles from these two methods are identical and agree well with those obtained from the matrix method when the air–panel surface reflections are neglected. Further, the derived matrix methods are applied to the asymmetric cases with different incident and exit angles. The simulated results on the normally black vertical alignment and normally white mixed-mode twisted nematic reflective displays show reasonably good agreement with the reported experimental data. In addition, a rubbing effect related to contrast values is observed and analyzed in asymmetric reflective cases. We also find that this effect has a significant influence on the contrast ratios once the difference between the incident and exit angles becomes large.
© 2005 Optical Society of AmericaFull Article | PDF Article
F. H. Yu and H. S. Kwok
J. Opt. Soc. Am. A 16(11) 2772-2780 (1999)
C.-J. Chen, A. Lien, and M. I. Nathan
J. Opt. Soc. Am. A 14(11) 3125-3134 (1997)
Jesper Osterman and Kent Skarp
Opt. Express 11(10) 1197-1202 (2003)