No abstract

No abstract

We have developed a novel transflective TFT‐LCD with a hybrid aligned nematic compensator (NH film). We discuss the effects of the optical parameters of NH film based on the results of computer simulations. When the parameters are optimized, a newly developed display made with NH film exhibits a high contrast ratio and good grayscale stability over a wide range of viewing angles in the transmissive mode. In particular, grayscale inversion in the vertical direction is well restrained.

The performance of a reflective color NB-STN-LCD with a single polarizer in combination with a twisted-nematic compensator is discussed. In contrast to combined uniaxial retarder sheets, it is possible to create a display with a high contrast ratio using only a single sheet, which is one of the advantages of the twisted-nematic compensator. For optimizing the performance of the display, the dispersion of the birefringence was found to be essential as well as the twist angle and the retardation of the compensator.

We have developed a novel ultra-thin homeotropically aligned liquid crystalline polymer (LCP) film called "NV film". NV film allows In-Plane-Switching (IPS) and Circularly-Polarized Vertical-Alignment (CPVA) LCDs to have excellent viewing angle performance with only a slight increase in the total thickness just by attaching the film to the panel.