Oblique light incidence onto hybrid aligned nematic (HAN) cells for optical compensators

Design and fabrication methods of HAN cells with arbitrary LC pretilt angle value are described. Phase retardation ΔΦ values for the hybrid LC vs. the LC pretilt angles θ0(1), θ0(2) on the opposite cell's substrates are calculated for arbitrary light incidence angle. LC director configuration is suggested for its application in optical compensators. LC pretilt angle value is measured in the HAN cells with given planar or vertical LC alignment on one of the substrates. © 2014 Society for Information Display.