In concrete fire table hidden propane tank 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 kotha model dress requirements for a mobile phone with a high screen ratio.