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features a dedicated sensor at the back. It is also worth noting that the Vivo
under-display technology is said to work with metal, OLED display, and also

certain type of plastic. It can not only be embedded under the display but also
behind the metal shell or even in the frame, as Vivo suggests.

The technology teased by Qualcomm could only penetrate 400um of
glass and capacitive scanners only go up to 300um. However, the Vivo under-

display improves on the sensing capabilities and as it can penetrate 1.3 mm of OLED,
525um of aluminium or 800um of glass.

With capacitive sensors, the water resistant capabilities is amiss. If you
have soiled or wet fingers, a capacitive sensor fails to scan your finger
impression. Similarly, instances where a smartphone is otherwise claimed to be

water resistant, the fingerprint sensing fails to work under water.

In contrast, the Vivo under- display is claimed to be
waterproof, dustproof and sweat proof, something we witnessed at the
experience zone. It is also worth mentioning that capacitive sensors as seen on

the Apple iPhone line-up, recognizes the finger impression through electronic
signals and does not support OLED screen or metal surface, whereas the

ultrasonic sensors use ultrasonic waves for fingerprint identification and support
OLED screen, metal and allow underwater usage.

By

Rinkumoni
PGDCA,SCC

Edition
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