Haptic device with controlled traction forces

摘要

A haptic device includes a substrate that is subjected to lateral motion such as lateral oscillation with one or more degrees of freedom together with modulation of a friction reducing oscillation in a manner that can create a shear force on the user's finger or on an object on the device.

主权项

1. A haptic device comprising
a substrate having a surface, a first actuator that modulates a friction experienced by user's finger touching the substrate surface; a second actuator that oscillates the substrate surface laterally, such that the combined effect of the first and second actuator is a net shear force applied to the user's finger; a finger position sensor that detects and measures location of the user's finger relative to the substrate surface, and a control device that controls the first actuator and second actuator and varies the magnitude and direction of the net shear force applied to the user's finger as a function of at least the measured location of the user's finger on the surface of the substrate, wherein a force field is created that acts upon the user's finger on the surface of the substrate.