Development of a Pitch Conversion Tactile Display with Spatial Resolution Higher than Human's Two-point Discrimination Ability

In this paper, we have proposed a pitch-converting mechanism to realize a tactile display with both spatial resolution and vibration stimulation, aiming to present fine texture to human fingertips. To optimize the design of the proposed tactile display, we proposed a theoretical model of the relationship between design parameters and vibration amplitude. Based on the results, we designed and fabricated the 7 elements pitch conversion tactile display. In the prototype display, 15 um displacement was obtained at a voltage of 25 V, and independent drives of each diaphragm were demonstrated, respectively.