Enlarged electro-tactile display with repeated structure

An electro-tactile display is a possible candidate for a tangible touch panel, because it only requires an electrode substrate that can be made transparent. However, although it needs relatively few components, it does still require several transistors per electrode, and wiring each electrode thus poses practical problems. This study therefore proposes the use of a repeated electrode structure to enlarge the display area of the electro-tactile display, without the need for additional electrical components. Skin impedance measurement, which was previously used for the stabilization of skin sensation, was utilized for sensing finger position, and the tactile pattern was presented only around the finger, enabling a larger presentation area.