According to AppleInsider Beijing time on August 29, local time on Tuesday, the US Patent and Trademark Office granted Apple a patent for sonic fingerprint imaging technology, the accuracy is enough to replace the current Touch ID optical fingerprint sensor, boosting the iPhone entity Home button "Time No more than the credibility of rumors.
After processing, the collected fingerprint image can be used to verify the identity of the user, much like the Touch ID. Unlike Apple's current fingerprint scanning hardware, sonic imaging technology does not require optical contact to evaluate objects, meaning that ultrasonic sensors can be placed under operating components, such as display screens.
Apple claims in the patent application that there are many limitations in traditional sonic imaging systems. For example, driving piezoelectric components has higher requirements for electrical energy. Apple estimates that the driving voltage of the piezoelectric components is between 0 and 100 volts, and the sensing system voltage is between 0 and 3.3 volts.
It is unclear whether Apple intends to use this sonic imaging technology in its products. Earlier this year, there were rumors that Apple was considering adopting an on-screen fingerprint sensor in the iPhone 8. The on-screen fingerprint sensor will replace the iPhone's iconic Home button to make more room for the full screen. Recently, insiders said that Apple has cancelled plans to integrate Touch ID in a new generation of iPhone.
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