Passive Acoustic Fingerprint Sensor

By using transmitter-free dynamic friction acoustic sensor technology in the biometric authentication system, the problems of insufficient performance and high cost in the prior art are solved, and safe, reliable and low-cost biometric identification and access control are achieved.

CN113874872BActive Publication Date: 2025-03-18QUALCOMM INC
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Patent Information

Application Number
CN202080038144.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2019-05-30
Filing Date
2020-05-27
Publication Date
2025-03-18
Estimated Expiration
2040-05-27

AI Technical Summary

Technical Problem

There is room for improvement in performance in existing biometric authentication technologies, especially while improving security and reducing costs, providing more reliable access control.

Method used

A transmitter-free sensor system is used to perform biometric identification by dynamic friction sound waves generated in the relative motion between the outer surface of the device and the target object. The system includes a sound receiver system and a control system, which uses a piezoelectric receiver array or an ultrasonic receiver system to receive dynamic friction sound waves, and extracts the characteristics of the target object through a digital signal processor or application-specific integrated circuit for authentication.

Benefits of technology

It realizes biometric identification without an ultrasonic transmitter, reduces equipment costs and energy consumption, improves system reliability and security, and avoids the risk of fingerprint residue.

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Abstract

The acoustic receiver system may be configured to receive dynamic friction acoustic waves generated via relative motion between an outer surface of the device and a target object in contact with the outer surface. The control system may be configured to receive an acoustic signal from the acoustic receiver system. The acoustic signal may correspond to a first instance of the dynamic friction acoustic wave. The control system may be configured to extract a target object feature from the first acoustic signal; and perform an authentication process based at least in part on the target object feature.
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