Simplified light sensing circuit, light sensing apparatus including the light sensing circuit, method of driving the light sensing apparatus, and image acquisition apparatus and optical touch screen apparatus including the light sensing apparatus

摘要

In a simplified light sensing circuit, a light sensing apparatus including the light sensing circuit, a method of driving the light sensing apparatus, and an image acquisition apparatus and optical touch screen apparatus including the light sensing apparatus, the light sensing circuit includes an oxide semiconductor transistor including a channel layer (15) including an oxide semiconductor material, for each pixel. The oxide semiconductor transistor is configured to operate as a light sensing device that senses light and a switch that outputs light sensing data. The oxide semiconductor material includes one or more of ZnO, InO, SnO, InZnO, ZnSnO, or InSnO, or a material formed by adding at least one of Hf, Zr, Ti, Ta, Ga, Nb, V, AI, and Sn to one of ZnO, InO, SnO, InZnO, ZnSnO, or InSnO.