A Swipe-Type Fingerprint Sensor Using Fixed-Displacement Shuttering Scheme

Sangwoo Kim, Taehyoung Kim, Jongho Jung, Gunhee Han

Research output: Contribution to journalArticlepeer-review

Abstract

Biometric sensors for wearable devices have a dilemma between the small physical size to fit within the small device and the large sensing area to obtain enough information for reliable recognition. A swipe-type fingerprint sensor is a good candidate that satisfies both of small size and large sensing area. This paper proposes a compact swipe-type fingerprint sensor using a fixed-displacement shuttering scheme to avoid the swiping-speed dependent image distortion. The shutter for a line image sensor is adaptively controlled by the displacement measure unit, which are consist of two lines of pixel array, Soft-XOR circuits and digital control circuits. The displacement of a finger is detected by calculating the pattern matching of two line images, which are separated for fixed distance. The proposed system utilizes optical pixels for high-speed image capturing. The prototype sensor chip was fabricated with 0.25mu text{m} standard CMOS process. The sensor chip occupies only 4mm times 0.9 mm and provides 625 dpi up to 25cm/s of swiping speed. Experimental results obtained from the sensor demonstrate that the proposed shuttering method reduced minutiae distribution by factor of 3 over the conventional fixed-time interval shuttering.

Original languageEnglish
Article number9149575
Pages (from-to)14791-14798
Number of pages8
JournalIEEE Sensors Journal
Volume20
Issue number24
DOIs
Publication statusPublished - 2020 Dec 15

Bibliographical note

Funding Information:
Manuscript received June 21, 2020; accepted July 18, 2020. Date of publication July 27, 2020; date of current version November 18, 2020. This work was supported in part by the Ministry of Science and ICT (MSIT), South Korea, through the “ICT Consilience Creative Program” supervised by the Institute for Information & Communications Technology Planning & Evaluation (IITP) under Grant IITP-2019-2017-0-01015 and in part the Ministry of Trade, Industry & Energy under Project 10080403. The associate editor coordinating the review of this article and approving it for publication was Dr. Zhichao Tan. (Corresponding author: Gunhee Han.) The authors are with the School of Integrated Technology, Yonsei University, Incheon 21983, South Korea (e-mail: gunhee@yonsei.ac.kr). Digital Object Identifier 10.1109/JSEN.2020.3012038

Funding Information:
The EDA Tool was supported by the IC Design Education Center.

Publisher Copyright:
© 2001-2012 IEEE.

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

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