Tactile sample for tactile display

Abstract

Currently, Research and development of tactile displays as data presentation devices using the tactile sense are making great progress. However, the challenge is that the presented sensation cannot be quantitatively evaluated because there is no index of tactile sensation. We propose a new evaluation method by measuring and quantifying the tactile sensation using tactile samples with variation of a single parameter, such as surface roughness and hardness. In this work, we demonstrate micro-patterned tactile samples made of SU-8. They have a concavo-convex shape of stripes. Differences in roughness were expressed by changing the pitch and width of the stripes and height of the concavo-convex. We also made tactile samples made of PDMS. The polymerization ratio of base resin and hardener ware changed to produce tactile samples with identical surface roughness but different hardness.