Low temperature poly-Si TFT-electrophoretic displays (TFT-EPDs) with four level gray scale

In order to realize low power consumption and high resolution displays, we have investigated electrophoretic displays (EPDs) combined with low temperature (/spl les/425/spl deg/C) polycrystalline-silicon thin film transistors (poly-Si TFTs). The electrophoretic microcapsule layer was coated on TFT array. As a result, we could successfully fabricate quarter VGA reflective type displays with bistability, wide-viewing angle and an 18 V operation. In addition, four level gray scale images were also obtained using an area ratio gray scale (ARG) driving method.