The front-mounted fingerprint scanner is being phased out as bezels keep shrinking. The trend led to the implementation of under-display fingerprint scanners, first introduced by vivo X20 Plus UD, later followed by the X21 UD, Xiaomi Mi 8 Explorer, and a few other manufacturers.
According to numbers from Sigmaintell, reported by Digitimes, shipments of in-display scanners will reach 42 million by the end of 2018, while in 2019 the amount will reach 100 million.
The new type of technology comes either with an optical scanner or an ultrasonic scanner. For example, vivo uses the…