Abstract
In this paper, we propose a tactile display that uses acoustic radiation pressure. We fabricated a prototype. The prototype display consists of an annular array, a 12 channel driving circuit, and a PC. The array has 91 pieces of 40 kHz ultrasound transducer. We measured the output force, the frequency characteristics and the spatial distribution of radiation pressure. We confirmed that the output force were 0.8 gf at the focal region and 2.9 gf just above the surface of the array. The frequency characteristics were fine up to 1 kHz. The spatial resolution was about 20 mm.
