Tribo Touch: Micro Patterned Surfaces for Low Latency Touchscreens
Touchscreen tracking latency, often 80ms or more, creates a rubberbanding effect in everyday direct manipulation tasks such as dragging, scrolling, and drawing. This has been shown to decrease system preference, user performance, and overall realism of these interfaces. In this research, we demonstrate how the addition of a thin, 2D micropatterned surface with 5 micron spaced features can be used to reduce motorvisual touchscreen latency. When a finger, stylus, or tangible is translated across this textured surface frictional forces induce acoustic vibrations which naturally encode sliding velocity. This acoustic signal is sampled at 192kHz using a conventional audio interface pipeline with an average latency of 28ms. When fused with conventional lowspeed, but highspatialaccuracy 2D touch position data, our machine learning model can make accurate predictions of realtime touch location. Published at CHI 2022. Research Team: Craig Shultz, Daewha Kim, Karan Ahuja and Chris Harrison Citation Shultz C. ,
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