Operating a fingerprint sensor comprised of ultrasonic transducers
First Claim
1. A method for operating a fingerprint sensor comprising a plurality of ultrasonic transducers, the method comprising:
- activating a first subset of ultrasonic transducers of the fingerprint sensor, the first subset of ultrasonic transducers for detecting interaction between an object and the fingerprint sensor; and
subsequent to detecting interaction between an object and the fingerprint sensor, activating a second subset of ultrasonic transducers of the fingerprint sensor, the second subset of ultrasonic transducers for determining whether the object is a human finger, wherein the second subset of ultrasonic transducers comprises a greater number of ultrasonic transducers than the first subset of ultrasonic transducers.
1 Assignment
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Accused Products
Abstract
In a method for operating a fingerprint sensor comprising a plurality of ultrasonic transducers, a first subset of ultrasonic transducers of the fingerprint sensor are activated, the first subset of ultrasonic transducers for detecting interaction between an object and the fingerprint sensor. Subsequent to detecting interaction between an object and the fingerprint sensor, a second subset of ultrasonic transducers of the fingerprint sensor are activated, the second subset of ultrasonic transducers for determining whether the object is a human finger, wherein the second subset of ultrasonic transducers comprises a greater number of ultrasonic transducers than the first subset of ultrasonic transducers.
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Citations
23 Claims
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1. A method for operating a fingerprint sensor comprising a plurality of ultrasonic transducers, the method comprising:
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activating a first subset of ultrasonic transducers of the fingerprint sensor, the first subset of ultrasonic transducers for detecting interaction between an object and the fingerprint sensor; and subsequent to detecting interaction between an object and the fingerprint sensor, activating a second subset of ultrasonic transducers of the fingerprint sensor, the second subset of ultrasonic transducers for determining whether the object is a human finger, wherein the second subset of ultrasonic transducers comprises a greater number of ultrasonic transducers than the first subset of ultrasonic transducers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A non-transitory computer-readable storage medium comprising instructions which when executed on one or more data processors, cause the one or more data processors to perform a method for operating a fingerprint sensor comprising a plurality of ultrasonic transducers, the method comprising:
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activating a first subset of ultrasonic transducers of the fingerprint sensor, the first subset of ultrasonic transducers for detecting interaction between an object and the fingerprint sensor; subsequent to detecting interaction between an object and the fingerprint sensor, activating a second subset of ultrasonic transducers of the fingerprint sensor, the second subset of ultrasonic transducers for determining whether the object is a human finger, wherein the second subset of ultrasonic transducers comprises a greater number of ultrasonic transducers than the first subset of ultrasonic transducers. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A fingerprint sensor comprising:
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a plurality of ultrasonic transducers; a memory; and a processor coupled to the memory and the plurality of ultrasonic transducers, the processor configured to; activate a first subset of ultrasonic transducers of the plurality of ultrasonic transducers, the first subset of ultrasonic transducers for detecting interaction between an object and the fingerprint sensor; subsequent to detecting interaction between an object and the fingerprint sensor, activate a second subset of ultrasonic transducers of the plurality of ultrasonic transducers of the fingerprint sensor, the second subset of ultrasonic transducers for determining whether the object is a human finger, wherein the second subset of ultrasonic transducers comprises a greater number of ultrasonic transducers than the first subset of ultrasonic transducers; and responsive to determining that the object is a human finger, capture an image of a fingerprint of the finger.
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Specification