Tip-Tap: Battery-free Discrete 2D Fingertip Input
summary
Tip-Tap implements fingertip input with battery-free RFID circuitry that senses intersections between a three-by-three thumb and index contact grid to detect 3x3 discrete positions (nine commands). Two studies with eight participants define reachable contact locations and a 3x3 evaluation shows eyes-free accuracy around 86% after brief practice; 4x4 was unreliable for users (~50% accuracy). Prototypes include a glove and a temporary-tattoo antenna, detection range about 4 m (chip nominally 7 m); smooth contacts outperform magnetic bumps.
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chapters (7)
- 0:00Introduction to Tip-Tap
- 2:17Designing the Tip-Tap system
- 5:29Two-dimensional input space
- 8:49Battery-free RFID sensing
- 10:37Prototypes and detection range
- 11:45Summary and contributions
- 12:13Q&A session
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