Gradual Power Wake-Up Mechanism
First Claim
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1. A method for use in activating a device based on detection of a fingerprint image, the method comprising:
- monitoring a first metric level of a first set of regions of a fingerprint image;
determining a second metric level of a second set of regions of the fingerprint image in response to the first metric level exceeding a first threshold, wherein the second set of regions includes more pixels than the first set of regions; and
activating the device based on the second metric level of the second set of regions of the fingerprint image.
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Abstract
Apparatuses and methods of a gradual power wake-up mechanism are disclosed. In one embodiment, a method of activating a device based on detection of a fingerprint image may include monitoring a first metric level of a first set of regions of the fingerprint image, determining a second metric level of a second set of regions of the fingerprint image in response to the first metric level exceeding a first threshold, and activating the device based on the second metric level of the second set of regions of the fingerprint image.
61 Citations
30 Claims
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1. A method for use in activating a device based on detection of a fingerprint image, the method comprising:
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monitoring a first metric level of a first set of regions of a fingerprint image; determining a second metric level of a second set of regions of the fingerprint image in response to the first metric level exceeding a first threshold, wherein the second set of regions includes more pixels than the first set of regions; and activating the device based on the second metric level of the second set of regions of the fingerprint image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device, comprising:
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a sensor having a plurality of sensor pixels configured to sense a fingerprint image; a memory configured to store the fingerprint image; and a controller coupled to the sensor and the memory and configured to; monitor a first metric level of a first set of regions of the fingerprint image; determine a second metric level of a second set of regions of the fingerprint image in response to the first metric level exceeding a first threshold, wherein the second set of regions includes more pixels than the first set of regions; and activate the device based on the second metric level of the second set of regions of the fingerprint image. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A non-transitory medium storing instructions for execution by one or more processors of a device, the instructions comprising:
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instructions for monitoring a first metric level of a first set of regions of a fingerprint image; instructions for determining a second metric level of a second set of regions of the fingerprint image in response to the first metric level exceeding a first threshold, wherein the second set of regions includes more pixels than the first set of regions; and instructions for activating the device based on the second metric level of the second set of regions of the fingerprint image. - View Dependent Claims (24, 25, 26, 27)
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28. A device, comprising:
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means for use in sensing a fingerprint image using a plurality of sensor pixels; means for use in storing the fingerprint image; means for monitoring a first metric level of a first set of regions of the fingerprint image; means for determining a second metric level of a second set of regions of the fingerprint image in response to the first metric level exceeding a first threshold, wherein the second set of regions includes more pixels than the first set of regions; and means for activating the device based on the second metric level of the second set of regions of the fingerprint image. - View Dependent Claims (29, 30)
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Specification