a-Si:H Thin-Film Transistor-Driven Flexible Color E-Paper Display on Flexible Substrates

A 14.3-in flexible color electronic-paper display with the highest resolution has been developed. This display uses an electrophoretic material between a-Si:H thin-film transistors (TFTs) on a metal foil and a color filter array (CFA) coated onto a plastic substrate, allowing it to recover its original shape after being bent and to produce color images. To make this new display possible, low-temperature processes ( <; 150°C) for TFT and CFA on flexible substrates have been developed, resulting in the minimization of panel deformation and the prevention of circuit structure change. Here, we also develop a U-type dual TFT structure and a quad-type CFA pattern suitable for this reflective-type display.