Xiaomi 12 fingerprint unlocking is fast.
The under-screen optical fingerprint solution adopted by Xiaomi Mi 12 is specifically a short-focus under-screen optical fingerprint located slightly lower. Ultrasonic screen fingerprints are not used. Although the fingerprint of Xiaomi Mi 12 is located lower, thanks to the compact body, the fingerprint pressing process of Xiaomi Mi 12 will not be inconvenient due to the lower position.
Xiaomi 12 screen fingerprint:
This phone provides users with a good under-screen ultrasonic fingerprint design. The characteristics of the ultrasonic under-screen fingerprint solution are strong penetration, high anti-fouling ability, and high recognition, but the cost is very expensive.
The principle is to emit ultrasonic waves to the finger surface through the sensor, using the difference in density of skin and air on the fingerprint surface to construct a 3D image. After the sensor receives the ultrasonic echo information, it compares the fingerprint information to achieve fingerprint recognition. . In addition to ultrasonic fingerprint recognition, many mobile phones actually use under-screen optical fingerprints.
One problem is that it can only be applied to OLED screens and has high power consumption. The good news is that LCD under-screen fingerprint recognition is also slowly being improved and may appear soon. Fingerprint unlocking is a biometric technology. Users can turn on the device they need to use through the entered fingerprint information.