Integrated system for detecting and matching fingerprints
First Claim
1. A method of obtaining a quality image by the use of at least one biometric capacitive fingerprint sensor having a plurality of capacitive sensor cells arranged underneath a surface of dielectric material and each comprising at least one capacitor plate, and a plurality of registers, wherein it comprises the step of modulating any electromagnetic field generated at each capacitor plate in accordance with worst cleaning conditions of said surface of dielectric material, thereby obtaining a quality image with a correct contrast between ridge and valley of a detected fingerprint.
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Accused Products
Abstract
A system for obtaining a quality image by the use of at least one biometric capacitive fingerprint sensor having a plurality of capacitive sensor cells arranged underneath a surface of dielectric material (11a) and each including at least one capacitor plate, and a plurality of registers, the system comprises the step of modulating any electromagnetic field generated at each capacitor plate in accordance with worst cleaning conditions of said surface (11a) of dielectric material, thereby obtaining a quality image with a correct contrast between ridge and valley of a detected fingerprint.
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Citations
29 Claims
- 1. A method of obtaining a quality image by the use of at least one biometric capacitive fingerprint sensor having a plurality of capacitive sensor cells arranged underneath a surface of dielectric material and each comprising at least one capacitor plate, and a plurality of registers, wherein it comprises the step of modulating any electromagnetic field generated at each capacitor plate in accordance with worst cleaning conditions of said surface of dielectric material, thereby obtaining a quality image with a correct contrast between ridge and valley of a detected fingerprint.
- 10. A biometric integrated system including a biometric database, at least one biometric capacitive fingerprint sensor having a plurality of capacitive sensor cells arranged underneath a surface of dielectric material and each comprising at least one capacitor plate, wherein each biometric fingerprint sensor comprises a protection case, a swinging frame supported in said protection case and arranged to be angularly moved between an inoperative stand-by position and an operating position in which a fingerprint sensor is facing a user'"'"'s finger
Specification