A hidden fingerprint device on an opaque display panel

Jhe Syuan Lin, Wen Shing Sun

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


In recent years, fingerprint recognition has become more and more widely used in mobile phones. A fingerprint recognition device hidden under an opaque display panel designed based on a waveguide and frustrated total internal reflection (FTIR) is proposed and demonstrated herein. In order to meet the demand for a high screen ratio for mobile phone displays, we use a symmetrical zoom-in and zoom-out coupler design. With this comprehensive coupler and waveguide design, not only can fingerprint recognition be achieved using an opaque display panel, but it also meets the appearance requirements for a mobile phone with a high screen ratio.

Original languageEnglish
Article number2188
JournalApplied Sciences (Switzerland)
Issue number6
StatePublished - 1 Mar 2020


  • Fingerprint recognition
  • Opaque display panel
  • Optical waveguide


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