ELECTROOPTICS OF A TWISTED NEMATIC LIQUID-CRYSTAL DISPLAY BY 2X2 PROPAGATION MATRIX AT OBLIQUE ANGLE

We present a new 2 x 2 propagation matrix for calculating the electro-optics of a liquid crystal display as a function of applied voltage and viewing angle. The 2 x 2 matrix method is obtained with the use of a new 2 x 2 propagation matrix for obliquely propagating light in a layered-inhomogeneous anisotropic medium. We show that the transmissions in a 90-degrees twisted nematic cell at various applied voltages and viewing angles that are computed by the 2 x 2 matrix method are in good agreement with the experimental results and with those computed by the 4 x 4 propagation matrix and by the generalized geometrical optics approximation.