25.2: Photo‐Sensor Thin Film Transistor based on Double Metal‐Oxide Layer for In‐cell Remote Touch Screen

Abstract

Abstract 16 inch LCD in‐cell remote touch screen with photo sensor in which the active structure is comprised of double metal‐oxide semiconductor layers (GIZO/IZO) in its pixels has been developed. Double metal‐oxide thin film transistor (TFT) for both switch and sensor elements shows high photo current as I light /I dark >10 6 , a mobility of >10cm 2 /Vs and high stability under LCD operation condition. In this paper, the possibility of a novel application of an optical touch screen which is entirely based on the metal oxide TFT is proposed.