PA29 Alignment Material Dependence of Director Configuration Transition and Relaxation in Reverse Twisted Nematic LCD

Abstract

In the Reverse Twisted Nematic (RTN) LCD, the RTN LC director configuration is realized by applying an AC voltage to a splayed twist cell. The RTN configuration relaxes to an original splayed twist configuration if removing the applying voltage. This process is regarded as a configuration transition and relaxation. To clarify alignment material dependence of this configuration transition/relaxation we fabricated a couple of series of RTN-LCDs by using different polyimide materials as alignment layers and quantified the transitional/relaxational behavior. In this report we are going to give a criterion to realize a stable RTN-LCD and investigate its relation to the LCD performance.