Optimization of the contrast ratio and the luminance in 2 polarizer TN dye-doped reflective display

The aim of our work has been the optimization procedures to obtain TN reflective display for different application. For optimization procedure the computer program worked by authors has been used. This program makes possible to obtain the contrast ratio and luminance of the display for different: spectral characteristics of the lighting source, human eye sensitivity, anisotropic and dichroic (dye-doped layer) properties of the liquid crystal layer, polarization properties of the used polarizing films ect. The calculation done by this program take into account the reflection and interference phenomena and also the real curve of the director profile in the liquid crystal layer. In this case the results obtained by this program are very similar to the real experimental results. The optimization procedure for reflective TN 2 polarizers display has been done. The influence of the display elements properties for finally contrast ratio and luminance has been described. The difference of optical parameters obtained for real director profile and ideal profile has been shown. As the result of our work one has obtained the close relationships between the properties of individual display elements and the display optical parameters. This knowledge makes possible for correctly choice of the display elements for different application of the 2 polarizers TN reflective display.