Scientists developed Tactile Rendering of 3D Features on touch surfaces,to simulate geometric features. By modulating the friction forces between the fingertip and the touch surface, an illusion of surface variations is created. Watch the videos…
Teams from Disney Research and the University of Bristol, they develop and apply a tactile rendering algorithm to simulate rich 3D geometric features (such as bumps, ridges, edges, protrusions, texture etc.) on touch screen surfaces.
“The underlying hypothesis is that when a finger slides on an object then minute surface variations are sensed by friction-sensitive mechanoreceptors in the skin. Thus, modulating the friction forces between the fingertip and the touch surface would create illusion of surface variations. We propose that the perception of a 3D “bump” is created when local gradients of the virtual bump are mapped to lateral friction forces.”
Ultra-Haptics is a system for creating haptic feedback in mid-air. Waves of ultrasound displace the air, creating a pressure difference. By causing many waves to arrive at the same place simultaneously, a noticeable pressure difference is created at that point. With this method, we are able to create multiple, concurrent points of haptic feedback in mid-air.
sources University of Bristol, Disney Research