A 368 x 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-Chivan Bai

*Corresponding author for this work

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

Abstract

This study proposes a 368 x 184 optical underdisplay fingerprint sensor designed and prototyped using 0.11-mu 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 x 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 x 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)
PublisherIEEE
Number of pages4
ISBN (Print)9781728160313
StatePublished - Mar 2020
EventIEEE Custom Integrated Circuits Conference (CICC) - Boston, Morocco
Duration: 22 Mar 202025 Mar 2020

Publication series

NameIEEE Custom Integrated Circuits Conference
PublisherIEEE

Conference

ConferenceIEEE Custom Integrated Circuits Conference (CICC)
CountryMorocco
CityBoston
Period22/03/2025/03/20

Keywords

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

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 x 184 Optical Under-Display Fingerprint Sensor With Global Shutter and High-Dynamic-Range Operation. In 2020 IEEE CUSTOM INTEGRATED CIRCUITS CONFERENCE (CICC) (IEEE Custom Integrated Circuits Conference). IEEE.