NHK has improved the resolution of their organic TFT (OTFT) flexible OLED panel by four times. The flexible OLED is a 5" 320x240 (QVGA), 80ppi panel. In its 318um-wide pixel (their previous panel's pixel size was 600um) the red, green and blue subpixels are transversely arranged. Its frame frequency is 60Hz.
The gate insulating film was formed by a coating method, which is suited for a large-area panel. The OLED layer was formed by an evaporation method using a low-molecular phosphorescent material.