Screen fingerprint

The fingerprints under the screen did not appear this year, but it was really popular this year. It only appeared last year, but few mobile phones are used, so this technology is classified as this year.
The full screen has changed many aspects of the mobile phone, including unlocking. In the case where the fingerprint module cannot be placed on the front side, the back fingerprint not only affects the overall aesthetics of the back but also has no positive effect on the experience, so the screen fingerprint is applied in the high voice. .
Vivo was the first vendor to release screen fingerprints, and it gradually became popular as technology matured and costs fell. The principle of screen fingerprinting is based on the self-illumination and ultra-thin characteristics of the OLED screen, so that the light penetrates the cover plate to illuminate the fingerprint, and then the fingerprint reflection light passes through the screen return sensor for recognition, thereby unlocking.