A Tactile Display using Ultrasound Linear Phased Array

We developed a new tactile display using acoustic radiation pressure. The display can produce a 1 mm diameter focal point and 2 gf total force. By steering the focal point using a linear phased array, the display creates various spatiotemporal patterns of pressure distribution on the skin precisely. We carried out experiments on “tactile apparent movement” with the tactile display and found that tactile apparent movement is evoked quite stably even if the successive stimuli are not vibration but indentation.