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US 8,805,031 B2Granted
Method and system for acoustic impediography biometric sensing
AssigneeSonavation, Inc.
InventorRainer M. Schmitt
Life of this patent
Estimating the term…
Abstract
Provided is a method for analyzing a fingerprint, including storing a captured fingerprint in a memory; and analyzing the stored fingerprint using acoustic sensing principles.
Claims13
A method for capturing an image of a fingerprint in a sensing device, comprising:
- placing fingerprint tissue of a finger in acoustical contact with a sensor matrix comprising an arrangement of piezo pillars:
- generating oscillations and acoustic waves within said piezo pillars via an inverse piezo-eleetrical effect;
- measuring an acoustic impedance load for each of said piezo pillars by measuring damping of oscillations for each of said piezo pillars;
- distinguishing at least ore ridge from at least one valley of said fingerprint tissue based upon said acoustic impedance load for each of a plurality of said piezo pillars, and wherein
- a first pillar within said matrix is configured to receive oscillation simultaneously with a second set of pillars within said matrix, said second set of pillars including at least one pillar that is adjacent to said first pillar, and including at least one pillar that is not adjacent to said first pillar, and wherein none of said second set of pillars has a surface that faces and is adjacent to a surface of said first pillar, and wherein
- said pillars other than said first pillar and said second set of pillars, are not configured to receive said oscillation simultaneously with said first pillar and said second set of pillars.
3 more elements
A fingerprint sensing apparatus, comprising:
- one or more devices for capturing an image of a fingerprint, each device including a matrix of piezo pillars;
- and wherein
- said pillars are configured to receive oscillation via excitation forces and wherein said oscillation is affected by damping in response to an acoustic impedance load being applied to said pillars, and wherein
- a first pillar within said matrix, is configured to receive oscillation simultaneously with a second set of pillars within said matrix, said second set ofpillais including at least one pillar that is adjacent to said first pillar, and including at least one pillar that is not adjacent to said first pillar, and wherein none of said second set of pillars has a surface that faces and is adjacent to a surface of said first pillar, and Wherein
- said pillars other than said first pillar and said second set of pillars, are not configured to receive said oscillation simultaneously with said first pillar and said second set of pillars.
2 more elements
Dependencies are inferred from the claim text.