Fingerprint recognition module, electronic device employing same, and method for manufacturing sound wave control member therefor

摘要

In a module for detecting a fingerprint, an electronic device using the module and a method for manufacturing an acoustic control member for the module, the module includes a contact member, a transducer, an impedance matching member, an acoustic control member and a signal processor. A fingerprint makes contact with the contact member. The transducer outputs an ultrasonic signal to the contact member and receives the ultrasonic signal reflected from the contact member. The impedance matching member is charged between the contact member and the transducer, to transmit the ultrasonic signal between the contact member and the transducer. The acoustic control member is inserted between the contact member and the transducer. The impedance matching member is charged inside of the acoustic control member. The signal processor makes electric contact with the transducer, to sense the fingerprint based on the received ultrasonic signal.