New under-display fingerprint sensor is slow but promising

Tech

Now that edge-to-edge displays are commonplace on smartphones, the new holy grail for mobile engineering is the creation of the under-display fingerprint sensor. Not under glass — that’s easy — but under the thickness of the glass plus display, something nobody has quite mastered on a production scale yet.

Yesterday Mashable brought us word of a new generation fingerprint sensor installed in a prototype Vivo smartphone. Today Engadget’s Richard Lai got to test it out at a trade show in Shanghai. The sensor, as it turns out, is the latest ultrasonic fingerprint sensor from Qualcomm that now works through OLED display stacks up to 1.2mm thick, up to 0.8mm of cover glass, or up to 0.65mm of aluminum (an increase from 0.4mm for both glass or…

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