Sony developed a 13.3" flexible color e-paper prototype (based on E Ink's EPD). The panel is only 150?m thick and weights 20g. The display features 800x1200 (75ppi) resolution,13% NSTC color gamut, 10% reflectance and 10:1 contrast ratio.
The prototype is made on a plastic substrate. Sony says that the key to high color gamut and reflectance was to attach a TFT substrate to an E Ink front plate with high precision (0.35?m), which reduced the margin between sub-pixels and increasing the aperture ratio of pixels. This is quite an achievement compared to the monochrome flexible prototype shown in September 2010.