Approaches to Realizing Sheet-Type Scanner with Scanning Light Source

Organic devices have attracted much attention because it could realize the fabrication of lightweight and flexible devices. Among these devices is the sheet-type scanner. In order to fabricate organic devices on a film substrate, self-alignment (SA) techniques would be useful. First, SA techniques for an organic or oxide thin-film transistor (TFT) were introduced. After that, our study on the structure and property of a scanner device with a scanning light source were reported. Our device had organic photodiodes (OPDs) and organic light-emitting diodes (OLEDs) on the same substrate. The OLEDs were used as the scanning light source and SA-TFTs were used for the active device. The device output signal depended on the distance between reflecting electrodes of OPDs and OLEDs, and the color density of the scanned target was confirmed by the signal. (C) 2013 The Japan Society of Applied Physics