Investigating Reaction Accuracy of Extended Touchscreen with Conductive Ink for Mobile Virtual Piano

ABSTRACTVarious methods have been researched to extend the interaction spaces around mobile devices. The method of using conductive ink extends touch interaction space using a sheet with a pattern of conductive ink, which is attached to a capacitive touchscreen. However, the extended area of the interaction space with this method depends on the size of the sheet on which the conductive ink can be printed. We propose a method of connecting sheets using conductive aluminum foil tape. As a test system and an application of this method, we fabricated a mobile virtual piano system with a two-octave keyboard and evaluated the reaction accuracy.