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. https://www.bekindtopets.com/great-deal-Caster-Wheel-for-Flybar-Electric-Bumper-Cars-flash-find/