Won-Ho Lee

P‐141: The Advanced Transflective IPS LCD by Photo Alignment Technology

We have developed 2.4″ QVGA transflective IPS LCDs with novel cell configuration. Transflective LCDs have intrinsically the difference of the optical phase retardation between the transmissive part and the reflective part. In order to compensate for this optical path length difference, we have newly designed the separate LC alignments for each transmissive and reflective parts with photo-alignment technique. The transmissive part has a homogenous liquid crystal alignment driven by an in plane electric switching field, which exhibits superb wide viewing angle characteristics. In the reflective part, the twisted liquid crystal alignment is adopted. Based on this new configuration, high reflectance and better contrast ratio can be provided without any compensation film or patterned retarder unlike conventional transflective LCDs.