Quantitative evaluation of an illusion of fingertip motion

In recent years, touch panels have become widespread as an intuitive means to activate device operations. Because the touch panel has a space over which a finger and a corresponding cursor moves, certain actions become intuitive compared to force input-type devices such as a pointing stick. If we could add an illusory feeling of finger motion with the force input interface, it would become more intuitive. We have found a new haptic illusion of "motion", which occurs when an electrical tactile flow is presented on the fingertip while experiencing a shearing force. We have also investigated occurrence conditions, focusing on the relation between shear force and movement speed of the electrical tactile stimulation. In our study, we investigated directional characteristic focusing on the illusory position of the finger perceived using a new electrocutaneous display mounted on a six-axis force sensor.