Fabrication and electro-optic characteristics of polymer-stabilized V-mode ferroelectric liquid crystal display and intrinsic H-V-mode ferroelectric liquid crystal displays: their application to field sequential fullcolor active matrix liquid crystal displays

Abstract

Shunsuke KobayashiJun XuHirokazu FurutaYuji MurakamiSatoru KawamotoMasafumi Oh-kouchiTokyo University of ScienceLiquid Crystal Institute and the GraduateSchool of Engineering ScienceYamaguchi, OnodaYamaguchi 756-0884, JapanHiroshi HasebeHaruyoshi TakatsuDainippon Ink. and Chemical Ind.Ina-machi, Kitaadachi-gunSaitama 362-8577, JapanAbstract. We fabricate ferroelectric liquid crystal display (FLCD) de-vices exhibiting a thresholdless V-shaped switching by adopting a me-sogenic liquid crystal polymer stabilization and also FLCDs exhibitinghalf-V-shaped switching using an undoped FLC material. These FLCDsare respectively called polymer-stabilization (PS)-V-mode FLCDs and in-trinsic H-V-mode FLCDs. By using especially developed polyimide ma-terials such as RN-1199 and RN-1411 series (from Nissan Chem., Ind.)for the surface alignment and together with a well-controlled rubbingtechnique, photoalignment, and ion-beam alignment, we succeed in fab-ricating zigzag defect-free FLCDs. In particular, the PS-V-mode FLCDfabricated in this way exhibits continuous operation with a high contrastratio of 700:1, and the intrinsic H-V-mode FLCD has good temperaturestability by using the combined alignment technique. Particularly, a field-sequential full-color (FS-FC) LCD using PS-V-mode FLCD shows goodlong-term stability for a continual operation. Using these FLCDs, we alsodevelop several prototype models of FS-FC active matrix LCDs with thespecification of video graphics arrays (VGAs) and extended graphicsarrays (XGAs), where we take advantage of their high-speed response(time constants 100 to 500 ms).