Lateral Force Based 2.5 Dimensional Display

Recently touchscreen interfaces have become popular worldwide. However, few touchscreens provide tactile feedback. Little hardware is commercialized for such kind of touchscreen. Some studies have focused on developing touchscreens that also provide tactile feedback. From our consideration, ``press,'' ``guide,'' and ``sweep'' movement are essential information for touchscreens. However, these devices have some operational disadvantages of these information. We intend to cope with these disadvantages by introducing the new idea of lateral-force-based display. We developed an experimental prototype of lateral-force-based display, investigated 2.5-dimensional sensations, realized a part of these essential information, and confirmed the linearity between the presented force and the bump amplitude. The use of a lateral-force-based display enabled virtual bump sensations to be presented with touchscreen.

Concept of Display