Vivo Mobiles

Vivo Presents Under Screen Finger Lock

The Chinese company's solution, called Vivo Under Display, is a fingerprint sensor that can be placed under glass, an OLED screen, or even aluminum(!), making it completely invisible and unobtrusive. It works by emitting ultrasonic sound waves which penetrate the skin of your finger and capture a precise, 3D image of your fingerprint. 

Vivo's sensor can penetrate glass, aluminum, and OLED deeper — the company claims — than any similar technology out there. More precisely, Vivo Under Display can penetrate 1.3mm of OLED, 525μm of aluminum or 800μm of glass. For comparison, Qualcomm's previous technology could only penetrate 400μm of glass, and capacitive scanners only go up to 300μm. 

Source Google

This should be enough for a phone manufacturer to place the sensor under the display — a more elegant solution than placing it, well, anywhere else. And there are other benefits: For example, Vivo's new fingerprint sensor is not affected by ambient light and it will work with wet fingers and sweat marks. The company is also working on a variant that also works underwater.