Gradual power wake-up mechanism
First Claim
Patent Images
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, and continuing to monitor the first metric level of the first set of regions of the fingerprint image in response to the first metric level being less than a first threshold, wherein the first metric level represents an acoustic energy level of the 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 the first threshold, wherein the second set of regions includes more pixels than the first set of regions, and wherein the second metric level represent an acoustic energy level of the second set of regions of the fingerprint image; 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.
12 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, and continuing to monitor the first metric level of the first set of regions of the fingerprint image in response to the first metric level being less than a first threshold, wherein the first metric level represents an acoustic energy level of the 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 the first threshold, wherein the second set of regions includes more pixels than the first set of regions, and wherein the second metric level represent an acoustic energy level of the second set of regions of the fingerprint image; 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, and continue to monitor the first metric level of the first set of regions of the fingerprint image in response to the first metric level being less than a first threshold, wherein the first metric level represents an acoustic energy level of the 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 the first threshold, wherein the second set of regions includes more pixels than the first set of regions, and wherein the second metric level represent an acoustic energy level of the second set of regions of the fingerprint image; 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, and continuing to monitor the first metric level of the first set of regions of the fingerprint image in response to the first metric level being less than a first threshold, wherein the first metric level represents an acoustic energy level of the first set of regions of the 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 the first threshold, wherein the second set of regions includes more pixels than the first set of regions, and wherein the second metric level represent an acoustic energy level of the second set of regions of the fingerprint image; 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 a fingerprint image, and continuing to monitor the first metric level of the first set of regions of the fingerprint image in response to the first metric level being less than a first threshold, wherein the first metric level represents an acoustic energy level of the 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 the first threshold, wherein the second set of regions includes more pixels than the first set of regions, and wherein the second metric level represent an acoustic energy level of the second set of regions of the fingerprint image; 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