Recent development of liquid crystal materials for AM-LCD use

Abstract

Small elastic constants and large dielectric anisotropy (/spl Delta//spl epsi/) LC substances are needed to develop the low driving voltage LCD. The phenomenological and theoretical calculation can be applied to develop large /spl Delta//spl epsi/ LC substances. It is very important to reduce the ion density of LC cell for good reliability LCD that is characterized by small residual DC and high voltage holding ratio. It has been found that the coexistence of large /spl Delta/ /spl epsi/ and good reliability are possible by the screening of LC substances. Non-polar substances featuring small /spl gamma//sub 1/ and low /spl Delta/n also have been developed, and they can be applied for not only to TN but also for IPS and VA modes.