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US 6,289,114 B1Granted
Fingerprint-reading system
AssigneeThomson-CSF
InventorJean-François Mainguet
Life of this patent
Estimating the term…
Abstract
A fingerprint-reading system includes a fingerprint sensor having an active surface sensitive to the pressure and temperature of a finger. The surface area of this sensor is far smaller than the surface area of the fingerprint to be read. The reading is done when the sensor and the finger are in contact and in a relative motion of sliding of the sensor and the finger with respect to each other. The system reconstitutes a complete image of the fingerprint from the partial images given by the sensor during this motion.
Claims20
A fingerprint reading system comprising:
- means for reading a fingerprint including a sensor having a sensing surface coupled to a matrix of contact sensitive elements for generating a series of partial images of a finger, placed in direct contact with said sensing surface, from relative sliding contact between said sensing surface and said finger, said sensing surface having a surface area smaller than a surface area of said fingerprint to be read;
- and
- means for reconstituting a total image of the fingerprint from said partial images.
A fingerprint reading system comprising:
- means for reading a fingerprint including a sensor having a sensing surface coupled to a matrix of several lines of sensing elements for generating a series of overlapping successive partial images of a finger placed in contact with said sensing surface from relative sliding contact between said sensing surface and said finger, said sensing surface having a surface area smaller than a surface area of said fingerprint to read;
- and
- means for reconstituting a total image of the fingerprint from said overlapping partial images.
Dependencies are inferred from the claim text.