PUCs: 静電容量方式マルチタッチパネルにおける���� ユーザの接触を必要としないウィジェット検出手法���� [PUCs: Detecting Transparent, Passive Untouched Capacitive Widgets on Unmodified Multi-Touch Displays]

Capacitive multi-touch displays are not designed to detect passive objects placed on them-in facto,these systems usually contain filters to actively reject such touch data. We present a technical analysis of this problem and introduce Pasive Untouched Capacitive Widgets (PUCs). Unlike previous approaches, PUCs do not require power, they can be made entirely transparent, they are detected reliably even when no user is touching them, and they do not require internal electrical of software modifications of the touch display or its driver. We show the results from testing PUCs on 17 different off-the-shelf capacitive touch display models, and provide initial technical design recommendations.