Patent ID: 9733720
Date: 2017-08-15
CPC Classifications: G06F,G09G,Y02D

Claim:
1. An electronic device comprising an ultrasound transmitter, an ultrasound receiver, a display screen, and a processing system, wherein the device is configured to: transmit ultrasonic signals from the ultrasound transmitter; receive ultrasound signals, through air, at the ultrasound receiver; use signals transmitted by the ultrasound transmitter and received at the ultrasound receiver to determine, at intervals, whether or not an object is present within a three-dimensional detection zone adjacent the device, by determining whether or not a set of presence conditions is met; alter the display screen when the results of two successive such determinations differ; and use signals transmitted by the ultrasound transmitter and received at the ultrasound receiver to detect a movement of an input object, and control a further operation of the device in response to said detection.