The switch from an optical under-display fingerprint sensor to the newer ultrasonic technology in Google's Pixel 9 lineup aims to provide a more reliable and accurate fingerprint scanning experience, capable of reading even wet or oily fingerprints.
Unlike optical scanners that rely on light and visual detection, ultrasonic sensors bounce ultrasonic pulses off fingerprints, allowing for greater accuracy and less susceptibility to environmental factors, such as changes in light levels or finger dryness.
The Pixel 9 is rumored to use Qualcomm's 3D Sonic Gen 2 (QFS4008) ultrasonic fingerprint scanner, the same model featured in the Samsung Galaxy S24 Ultra, promising a high level of technology consistency across flagship devices.
While the ultrasonic fingerprint scanner will be present in all Pixel 9 models except the Fold 2, which will retain its power button-based sensor, more details are anticipated to be revealed during Google's hardware event scheduled for August 13th.
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