Apple’s smudge-detection patent prevents an iPhone screen from accidentally turning off

iDownload Blog
By Christian ZibregAug 4, 2015, 11:43 am393 pts
When you bring up an iPhone to your ear to take or receive a phone call, the handset taps the built-in proximity sensor near the ear piece to detect that you’re holding your phone up and then turns off the display to prevent spray input from your face. But sometimes a smudge from your finger can block the path…

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