Tactile feedback generated by phase conjugation of ultrasound surface acoustic waves

摘要

Described embodiments include a system and a method. A system includes an ultrasound locator transmitter acoustically coupled with an ultrasound-conducting layer of a display surface and configured to broadcast a detection ultrasound wave across at least a portion the ultrasound-conducting layer. An ultrasound receiver is acoustically coupled with the ultrasound-conducting layer and configured to receive a portion of the detection ultrasound wave scattered from a touch by the human appendage to a location on the display surface. A steered-beam ultrasound transmitter is acoustically coupled with the ultrasound-conducting layer and configured to deliver a focused ultrasound wave to the touch location. The focused ultrasound wave has a power density producing a stress pattern directly perceivable or discernible by the human appendage at the touch location. A stimulation controller is configured to initiate a delivery of the focused ultrasound wave to the touch location by the steered-beam ultrasound transmitter.