https://wccftech.com/xiaomi-teases-in-display-fingerprint-scanner-whole-front/

Smartphone manufacturers are slowly phasing out traditional fingerprint readers in favor of in-display scanners, but since the technology is still new, it has its own share of problems. Most of the first-generation in-display fingerprint readers are not as fast as their conventional counterparts and setting them up often takes a couple of attempts. Moreover, the scanning area is also limited which means a user cannot just put his finger anywhere on the display and expect the device to unlock. However, it seems that Xiaomi has finally found a way to remedy all these issues.

Xiaomi’s co-founder and president Lin Bin recently took to Weibo to demo a prototype device that is integrated with the company’s next-generation in-display fingerprint reader. The video shows that it takes just one tap to register the fingerprint and practically the whole screen can be used as a scanning area. This is a significant improvement over the current implementation of the technology, which restricts users to a pre-defined sensing area.