抄録
Vibrotactile texture stimuli have been commonly used for roughness presentation. The extension of such stimulation to other textural modalities benefits their applications. We found that laterally asymmetric vibrotactile stimuli cause the sense of friction rather than vibration. When the vibrotactile contactor moves one way, it sticks to the finger pad and induces lateral skin stretch. In contrast, when the contactor moves the other way, it slips due to its quick motion and involves little skin stretch. As a result, humans experience frictional sensations in scanning the contactor. We examined subjective responses and measured interactive forces between the finger pad and contactor. Both perceptual and physical experiments corroborated the principle of friction display. The laterally asymmetric vibrotactile stimuli increased the finger pad skin stretches and sense of friction. Such frictional display widens the capability of traditional vibrotactile displays and fosters its commercial values.
