L‐4: <i>Late‐New Paper:</i> Active‐Matrix Operation of Electrophoretic Devices with Inkjet‐Printed Polymer Thin Film Transistors

Abstract

Abstract Active‐matrix operation of an electrophoretic device has been achieved with all‐polymer thin film transistors (TFTs). The source/drain, gate electrodes and gate lines of the TFTs were fabricated by inkjet printing with a conductive polymer, polyethylenedioxythiophene (PEDOT). Electrophoretic material was prepared from TiO 2 particles suspended in dyed solution, and was microencapsulated in polymer membrane spheres. The microcapsules were sandwiched between the polymer active‐matrix array and a counter electrode. The voltage of each pixel was independently changed by switching the printed polymer TFT, and contrast in the electrophoretic material was successfully obtained.