Data underlying the publication - Sliding Speed Influences Electrovibration-Induced Finger Friction Dynamics on Touchscreens

This study investigates how exploration conditions affect electrovibration-induced finger friction on touchscreens and the role of skin mechanics. Ten participants slid their index fingers across an electrovibration-enabled touchscreen at five speeds ($20\sim100$~mm/s) and force levels ($0.2\sim0.6$~N). Contact forces and skin accelerations were measured while applying amplitude-modulated voltage signals spanning the tactile frequency range. The finger-display interaction was modeled as a first-order system and the skin mechanics as a mass-spring-damper system. Results showed that higher sliding speeds increased the cutoff frequency of the interaction response, likely due to higher finger stiffness. Inter-participant variability affected the model parameters of both responses. Based on these findings, a speed-dependent friction model was developed to deliver consistent electrovibration stimuli across varying exploratory conditions.