Tactile Display Presenting a Surface Texture Sensation

概要

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Along with force sensations, tactile sensations originating in the surface textures of physical objects are principal clues enabling users of a virtual environment to perceive those objects. We have developed a tactile display that depicts tactile surface textures while a user is exploring a virtual object surface with his or her fingertip. The display imparts a vibratory stimulus to the fingertip, which is placed in contact with a vibrating tactor matrix. A piezo-electric actuator drives the individual tactors in accordance with both the finger movement and the surface texture being traced. Spatiotemporal display control schemes for presenting the fundamental surface texture elements were examined. The duration of the vibratory stimulus was experimentally optimized to simulate the adaptation process in the cutaneous sensation. For some edge shapes, a method based on augmented duration was investigated, in which afterimages of boundary edges are emphasized. The spatial resolution of the display was measured, with a number of lines presented both perpendicular and parallel to the axis of the finger. The ability of users to discriminate a mean density was also measured, with the texture presented by random dots to produce a pseudo-gray scale.
一般社団法人情報処理学会の論文
1996-03-15