Qualcomm Incorporated

Nirma Lnu

Raj Kumar

John Keith Schneider

Hrishikesh Vijaykumar Panchawagh

Yipeng Lu

Nicholas Ian Buchan

Sandeep Louis D'Souza

Stephen Michael Gojevic

Sai Praneeth Sreeram

Rakesh Pallerla

Fitzgerald John Archibald

Jack Conway Kitchens, Ii

Chin-Jen Tseng

Evan Michael Breloff

Alexei Stoianov

Livingstone Song

James Anthony Miranto

Emily Kathryn Brooks

Chandrika Singasani

A method may involve obtaining a latent fingerprint on a surface, storing the latent fingerprint, obtaining a live fingerprint on the surface, and authenticating the live fingerprint based in part on the stored latent fingerprint and in part on previously-authenticated fingerprint data. The method may involve rejecting authentication of the live fingerprint as a potential spoof, if the live fingerprint matches the latent fingerprint under a relatively strict correlation test. The method may also involve, when the live fingerprint doesn't closely match the latent fingerprint, granting authentication of the live fingerprint if the live fingerprint matches the previously-authenticated fingerprint data under a relatively loose correlation test.

Fingerprint sensor with detection of latent fingerprints

Methods, devices and systems for controlling an ultrasonic fingerprint sensor are disclosed. Some examples involve determining that a first bias voltage is not sufficient for one or more affected ultrasonic receiver pixels of the ultrasonic receiver array and determining one or more affected regions of the ultrasonic receiver array in which the one or more affected ultrasonic receiver pixels are located. Some examples involve determining one or more unaffected regions of the ultrasonic receiver array in which the one or more affected ultrasonic receiver pixels are not located. Some examples involve determining a second bias voltage for the one or more affected regions and recalibrating the ultrasonic fingerprint sensor to apply the second bias voltage to the affected regions and to apply the first bias voltage to the one or more unaffected regions when the ultrasonic receiver array receives ultrasound signals.

Application of different bias voltages to regions of an ultrasonic fingerprint sensor

An apparatus may include a cover layer, a layer of first metamaterial proximate (or in) the cover layer, a light source system configured for providing light to the layer of first metamaterial and a receiver system. The first metamaterial may include nanoparticles configured to create ultrasonic waves when illuminated by light. The receiver system may include an ultrasonic receiver system configured to receive ultrasonic waves reflected from a target object in contact with, or proximate, a surface of the cover layer. The control system may be configured to receive ultrasonic receiver signals from the ultrasonic receiver system corresponding to the ultrasonic waves reflected from the target object and to perform an authentication process and/or an imaging process that is based, at least in part, on the ultrasonic receiver signals.

Fingerprint sensor system including metamaterial

Growing community of inventors

Hyderabad Telangana, India

Nirma Lnu