Designing Of 2d Illusory Tactile Feedback For Hand-Held Tablets

In this paper, we investigate whether the "out of body" tactile illusion can be extended or applied to a relatively large hand-held device such as a tablet for which the hands/fingers would not be in direct contact with the vibration motors. We derived guidelines for applying tactile illusion techniques in 2D space with regards to operational conditions such as the size of the device, holding position, minimally required vibration amplitudes, and the effects of matching visual feedback. For this purpose, a series of exploratory pilot experiments were first conducted in 1D space. Based on the results, a 2D illusory tactile rendering method was devised and tested for its effectiveness. We have found that for a tablet sized device (e. g. iPad mini and iPad), the illusory perception was possible with a rectilinear grid resolution of 5 x 7 ( with a grid size of 2.5 cm) with matching visual feedback.