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Printerface: Screen Printed Electroluminescent Touch Interface

Printerface proposes a visual design technique to create customized and interactive icons that may be applied to paper or textile substrates. The icons are screen printed electroluminescent (EL) and conductive inks. Research in the field of printed electronics traditionally uses either dot-matrix or multiple capacitive buttons for interaction. Current low-resolution interfaces limit customizability and user interaction. The Printerface demo suggest a new method which allows a designer visual freedom over low-resolution displays. The graphical nature of the screen print process allows a series of communicative icons to follow a defined visual language. Special steps were taken during the design process to create icons that illuminate from a single layout of segments. A microcontroller illuminates specified segments of EL to display each icon of a music playback interface: play, pause, back, and skip (figure 1a). Each electrode of the display additionally acts as a capacitive sensor to interpret user interaction. The capabilities of this technology allow new notification and interactive possibilities for low-resolution, flexible interfaces.