According to foreign media reports, Apple is currently developing "ultrasonic in display fingerprint scanner". Vivo, Huawei and Xiaomi (the flagship machine not released by Xiaomi) have started mass production of mobile phones equipped with fingerprint recognition sensors under the optical screen. Synaptics and Huiding Technology have developed fingerprint recognition technology under the optical screen. Its technical principle is to project users' fingerprints onto the sensor with reflected light to unlock.

It is reported that in addition to Apple, Samsung is also developing fingerprint identification technology under the ultrasonic screen. It is rumored that this technology has a higher accuracy rate than the fingerprint identification technology under the optical screen, but the production is low and the cost is high. Foreign media said that the Samsung Galaxy S10, which will be released next year, will adopt this technology, while it is unlikely that Apple's 2019 new machine will be equipped with this technology.

 vivo APEX

At present, there are three main types of biometric identification used in smart phones on the market. The first is fingerprint identification, which is the most common one. Many flagship phones ranging from 5000 yuan to 6000 yuan and down to 800 entry-level phones are equipped with fingerprint identification; The second is iris recognition, which is common in Samsung flagship mobile phones; The last one is face recognition, such as iPhone X.

Huawei Mate RS Porsche Design

Friends who often play with computers know that there are generally two types of face recognition. One is simple recognition only by front camera, and the other is high-precision face recognition with infrared transmitter, dot matrix projector and other components. There are also two kinds of fingerprint identification. The conventional way is to place the fingerprint sensor outside the display screen, and the other way is to place the fingerprint sensor below the screen, which is called under screen fingerprint or screen fingerprint. The advantage of offline fingerprint is that it can improve the proportion of mobile phone screens while maintaining the integrity of the back of the phone body. At present, Vivo and Huawei are in use. However, although Huawei Mate RS Porsche design uses offline fingerprint, there is still a second fingerprint sensor on the back.

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