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An advanced fingerprint sensor LSI and its application to a fingerprint identification system

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9 Author(s)
H. Morimura ; NTT Lifestyle & Environ. Technol. Labs., Kanagawa, Japan ; S. Shigematsu ; T. Shimamura ; K. Fujii
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We developed an advanced fingerprint sensor LSI that features a novel sensor structure, sensing circuit, and calibration circuit, using the 0.5-/spl mu/m CMOS process/sensor process. The LSI is reliable, sensitive, and tolerant to changes in the sensor surface conditions for capturing clear fingerprint image over long-term use. We also introduce a fingerprint-image adjustment scheme with an adjustable A/D converter to obtain image quality suitable for identification. The fingerprint sensor LSI was applied to a fingerprint identification system with the fingerprint-image adjustment scheme and achieved sufficient performance for a practical fingerprint identification system.

Published in:

VLSI Circuits Digest of Technical Papers, 2002. Symposium on

Date of Conference:

13-15 June 2002