MULTIPLE LIGHT PATHS ARCHITECTURE AND OBSCURATION METHODS FOR SIGNAL AND PERFUSION INDEX OPTIMIZATION
First Claim
1. An electronic device comprising:
- one or more light emitters configured to generate a plurality of light paths, wherein at least two of the plurality of light paths have separation distances with a predetermined relationship;
one or more light sensors configured to detect the at least two light paths having the predetermined relationship; and
logic coupled to the one or more light sensors and configured to detect a physiological signal from the at least two light paths.
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Accused Products
Abstract
A photoplethysmographic (PPG) device is disclosed. The PPG device can include one or more light emitters and one or more light sensors to generate the multiple light paths for measuring a PPG signal and perfusion indices of a user. The multiple light paths between each pair of light emitters and light detectors can include different separation distances to generate both an accurate PPG signal and a perfusion index value to accommodate a variety of users and usage conditions. In some examples, the multiple light paths can include the same separation distances for noise cancellation due to artifacts resulting from, for example, tilt and/or pull of the device, a user'"'"'s hair, a user'"'"'s skin pigmentation, and/or motion. The PPG device can further include one or more lenses and/or reflectors to increase the signal strength and/or and to obscure the optical components and associated wiring from being visible to a user'"'"'s eye.
94 Citations
26 Claims
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1. An electronic device comprising:
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one or more light emitters configured to generate a plurality of light paths, wherein at least two of the plurality of light paths have separation distances with a predetermined relationship; one or more light sensors configured to detect the at least two light paths having the predetermined relationship; and logic coupled to the one or more light sensors and configured to detect a physiological signal from the at least two light paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for determining a physiological signal from an electronic device, the electronic device including one or more light emitters and one or more light sensors, the method comprising:
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emitting light from the one or more light emitters to generate a plurality of light paths, wherein at least two of the plurality of light paths have separation distances with a predetermined relationship; receiving light from the one or more light sensors; and determining the physiological signal from the received light. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification