QUALCOMM Incorporated
Apparatus and method for ultrasonic fingerprint and force sensing

Abstract:

A method may involve estimating a force applied by a target object on a surface, determining at least one ultrasonic fingerprint sensor parameter modification based, at least in part, on the force and updating at least one setting of an ultrasonic fingerprint sensor based, at least in part, on the ultrasonic fingerprint sensor parameter modification. The method may involve controlling the ultrasonic fingerprint sensor to transmit first and second ultrasonic waves towards the target object and receiving first and second ultrasonic receiver signals, including signals corresponding to reflections of the first and second ultrasonic waves from the target object, from the ultrasonic fingerprint sensor. The method may involve performing an authentication process based, at least in part, on the first and second ultrasonic receiver signals.