Low power scan for device wake up and unlock
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United States of America Patent
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Dec 26, 2017
Issued Date -
N/A
app pub date -
Aug 28, 2014
filing date -
May 30, 2014
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Abstract
A low power can for device wake up and unlock is disclosed. The low power scan can include one or more algorithms used to detect a sequence and/or one or more gestures to wake up a processor and unlock the device. A sequence and/or one or more gestures can be determined by a microcontroller and/or by a separate hardware component. The microcontroller can send a notification to the processor and/or switch the device from an idle to an active state. By detecting the sequence and gestures in the microcontroller before waking up the processor, the battery life can be extended. In some examples, the microcontroller can determine if the sequence and gestures are due to water splashes, water film, and/or noise. In such examples, the microcontroller can reject the touch without waking up the processor, and further extending the battery life of the device.
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