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In-display fingerprint readers: How they work plus optical vs ultrasonic

One year ago   |   By Pocket-lint

An increasing number of phones feature in-display fingerprint reader. But how do they work and how is the tech evolving? Although the iPhone has moved to Face ID on new models, all of the big Android phones offer fingerprint ID as the main biometric entry point to your phone - even if they also hedge their bets in terms of supporting improved facial recognition as well. Huawei and Oppo/OnePlus were first to seriously incorporate fingerprint sensors under the screen and they remain some of the key advocates. Let's look at the technologies involved in bringing under-display fingerprint...
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