Abstract
In this paper we discuss about the tactile information required for touchscreen interfaces, and propose a lateral-force-based 2.5-dimensional haptic display. The use of a lateral-force-based display enabled virtual bump sensations to be presented. 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, previous studies have some operational disadvantages for 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.
