A 368 × 184 Optical Under-Display Fingerprint Sensor with Global Shutter and High-Dynamic-Range Operation

Ping Hung Yin, Chih Wen Lu, Jia Shyang Wang, Keng Li Chang, Fu Kuo Lin, Chia Jung Chang, Gen Chiuan Bai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study proposes a 368 × 184 optical under-display fingerprint sensor designed and prototyped using 0.11-μ m CIS technology. The prototype sensor with global shutter operation and an ADC-embedded in an 8-pixel configuration features low noise, low-power consumption, fast response time, and a smaller signal processing circuit area. Two sets of memory (184 × 92 bytes) are also embedded in the pixel array to save external memory cost. A dynamic range of 126 dB is achieved with 8-segment auto exposure and dark level adjustment with programmable gain control. The prototype fingerprint sensor was successfully embedded in a mobile phone for functional verification, and the power consumption was only 25 mW with a 3.3 V supply voltage. The sensor has a chip size of 9.74 mm × 4.6 mm, a resolution of 1154 dpi, and a sensing area of 73%.

Original languageEnglish
Title of host publication2020 IEEE Custom Integrated Circuits Conference, CICC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728160313
DOIs
StatePublished - Mar 2020
Event2020 IEEE Custom Integrated Circuits Conference, CICC 2020 - Boston, United States
Duration: 22 Mar 202025 Mar 2020

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2020-March
ISSN (Print)0886-5930

Conference

Conference2020 IEEE Custom Integrated Circuits Conference, CICC 2020
CountryUnited States
CityBoston
Period22/03/2025/03/20

Keywords

  • CMOS image sensor
  • fingerprint sensor
  • global shutter
  • high dynamic range
  • under-display fingerprint sensor

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  • Cite this

    Yin, P. H., Lu, C. W., Wang, J. S., Chang, K. L., Lin, F. K., Chang, C. J., & Bai, G. C. (2020). A 368 × 184 Optical Under-Display Fingerprint Sensor with Global Shutter and High-Dynamic-Range Operation. In 2020 IEEE Custom Integrated Circuits Conference, CICC 2020 [9075898] (Proceedings of the Custom Integrated Circuits Conference; Vol. 2020-March). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC48029.2020.9075898