ディスコティック液晶の傾斜配向を利用したTFT-LCDの視野角拡大フイルムの開発

抄録

The Wide View Film, a novel optical compensation film for TFT-LCDs was developed to realize wide viewing angle characteristics, without sacrificing brightness of LCDs, utilizing negative birefringence of a discotic liquid cristal. The optical compensation of the Wide View film is to make the coating layer of negative birefringence material have the same orientation structure as that of TN liquid crystals in dark state of a TFT-LCD so that all components of positive birefringence of TN liquid crystals can be compensated. It was found that thin coating layer can be made of discotic liquid crystals which align obliquely and optically in high order. Therefore discotic liquid crystals were utilized as the negative birefringence material for the WV film. In this paper we describe mainly the characteristics and behavior of discotic liquid crystals on alignment layers and the application of the thin coating layer to optical compensation film for improving the viewing angle of TFT-LCDs.