User identification system based on plethysmography
First Claim
1. A method of an electronic device including a plurality of light sensors and light emitters, the method comprising:
- receiving first light information at a first light sensor co-located with a first light emitter of at least a first wavelength, the first light information based on a reflection of light emitted by the first light emitter, wherein receiving the first light information includes receiving a plurality of first light information data points over a plurality of collection times;
receiving second light information at a second light sensor co-located with a second light emitter of at least a second wavelength, different from the first wavelength, the second light information based on a reflection of light emitted by the second light emitter, the second light sensor and the second light emitter separate and distinct from the first light sensor and the first light emitter, respectively,wherein receiving the second light information includes receiving a plurality of second light information data points over the plurality of collection times;
for each of the plurality of collection times, associating the first information with the collection time to the second information associated with the collection time;
generating a scatterplot using the associations of the first information to the second information with the collection time;
comparing the generated scatterplot to a stored scatterplot;
determining one or more physical characteristics of a vasculature of a user based on the comparison; and
identifying the user of the electronic device based on the one or more physical characteristics of the vasculature.
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Accused Products
Abstract
A light emitter and light sensor pair can be used to determine one or more characteristics of a user'"'"'s vasculature. For example, a pulse oximeter employs a light emitter and a light sensor to measure the percentage of oxygenated blood in a subject. In examples of the present disclosure, light emitters and light sensors can be used to perform biometric identification of a user based on identifying characteristics of the user'"'"'s vasculature. For example, light information can be obtained at one or more light sensors, and the information can be compared to stored information associated with a user identity. Based on the comparison, the user of the device can be identified as having the user identity.
89 Citations
20 Claims
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1. A method of an electronic device including a plurality of light sensors and light emitters, the method comprising:
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receiving first light information at a first light sensor co-located with a first light emitter of at least a first wavelength, the first light information based on a reflection of light emitted by the first light emitter, wherein receiving the first light information includes receiving a plurality of first light information data points over a plurality of collection times; receiving second light information at a second light sensor co-located with a second light emitter of at least a second wavelength, different from the first wavelength, the second light information based on a reflection of light emitted by the second light emitter, the second light sensor and the second light emitter separate and distinct from the first light sensor and the first light emitter, respectively, wherein receiving the second light information includes receiving a plurality of second light information data points over the plurality of collection times; for each of the plurality of collection times, associating the first information with the collection time to the second information associated with the collection time; generating a scatterplot using the associations of the first information to the second information with the collection time; comparing the generated scatterplot to a stored scatterplot; determining one or more physical characteristics of a vasculature of a user based on the comparison; and identifying the user of the electronic device based on the one or more physical characteristics of the vasculature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An electronic device, comprising:
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a first light emitter configured to emit at least a first wavelength; a second light emitter configured to emit at least a second wavelength; a first light sensor co-located with the first light emitter and configured to detect a reflection of light emitted by the first light emitter; a second light sensor co-located with the second light emitter and configured to detect a reflection of light emitted by the second light emitter; and a processor configured to; receive first light information from the first light sensor including receiving a plurality of first light information data points over a plurality of collection times; receive second light information at the second light sensor including receiving a plurality of second light information data points over a plurality of collection times; for each of the plurality of collection times, associating the first information with the collection time to the second information associated with the collection time; generating a scatterplot using the associations of the first information to the second information with the collection time; comparing the generated scatterplot to a stored scatterplot; determine one or more physical characteristics of a vasculature of a user based on the comparison; and identify a user of the electronic device based on the physical characteristics of the vasculature. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification