Design and Fabrication of an ultra-thin under-display fingerprint sensor

Wei Jei Peng, Jhe Syuan Lin, Yuan Chieh Cheng, Ming Fu Chen, Wen Shing Sun

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Recently, the phones with high screen-to-body ratio are popular in the market, and it leads to the demand of in-display fingerprint recognition. The optical fingerprint sensor is based on frustrated total internal reflection (FTIR), and the camera type independent on the panel process is cost-effective and with high yield rate. To meet the volume constraint of the smart phone, a miniaturized compact lens is designed. For maximizing the sensing area in the limited space, the field of view can reach 128°. To increase the accuracy and speed of the recognition, the design has extremely small distortion and low f-number. Mostly importantly, the resolution should be sufficient for the fingerprint extraction algorithm. To achieve the specifications, the lens is designed with three aspheric plastic lenses using injection molding. In this paper, the procedure of optical design, mechanical design, lens fabrication and assembly of the prototype is presented. Finally, the prototype is employed for fingerprint identification.

原文???core.languages.en_GB???
主出版物標題Optical Design and Testing X
編輯Yongtian Wang, Tina E. Kidger, Osamu Matoba, Rengmao Wu
發行者SPIE
ISBN(電子)9781510639119
DOIs
出版狀態已出版 - 2020
事件Optical Design and Testing X 2020 - Virtual, Online, China
持續時間: 11 10月 202016 10月 2020

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
11548
ISSN(列印)0277-786X
ISSN(電子)1996-756X

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???event.eventtypes.event.conference???Optical Design and Testing X 2020
國家/地區China
城市Virtual, Online
期間11/10/2016/10/20

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