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Joined 1 year ago
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Cake day: July 26th, 2023

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  • Mind you, there are two types of under screen fingerprint sensors: optical and ultrasonic.

    Optical blasts the finger with light and forms a 2d scan. It’s pretty slow and arguably worse than conventional (capacitive) scanner on the back of the phone.

    Ultrasonic, however, because it uses sound waves, maps a 3d scan. It is significantly faster than conventional scanner, and it also doesn’t care about your fingers being wet.

    Ultrasonic sensor only requires a quick tap to unlock the phone. It’s actually really convenient to use, I like those. I’d take the capacitive sensor over optical one, though.