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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.
- Fingerprint recognition
- Opaque display panel
- Optical waveguide
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- 1 Finished
Design of Large Diameter Projector Lens for Dlp Four Million Pixel and Discussion on Temperature and Relative Illumination
1/08/19 → 31/07/20