To do this, hypersensitive organic photodiodes are placed on the screen. Therefore, the seller does not need to equip their smartphones with a separate fingerprint scanner. So the screen is the browser.
But what the new technology means is that along with fingerprints, sensors read the pressure and pulse level. As mentioned, it is enough to stick a few fingers of one hand on the screen to obtain data, but for absolute accuracy, you should still measure pressure and heart rate by placing the fingers of both hands alternately.
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