WEARABLE MULTI-MODAL PHYSIOLOGICAL SENSING SYSTEM
First Claim
1. A method of an electronic device including a plurality of light emitters, a plurality of light sensors, and a plurality of light guides, the method comprising:
- emitting light from a first light emitter through a first light guide, wherein the first light emitter is located a first distance away from a tissue of a user;
receiving first light information from the first light guide;
emitting light from a second light emitter through a second light guide, wherein the second light emitter is located a second distance, greater than the first distance, away from the tissue of the user;
receiving second light information from the second light guide; and
computing a heart rate signal based on the first and second light information.
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Accused Products
Abstract
A PPG signal may be obtained from a pulse oximeter, which employs a light emitter and a light sensor to measure the perfusion of blood to the skin of a user. However, the signal may be compromised by noise due to motion artifacts. To address the presence of motion artifacts, examples of the present disclosure can receive light information from each of two light guides, one in contact with the tissue of the user and one not in contact with the tissue of the user. First light information can be obtained from the first light guide, and second light information can be obtained from the second light guide. A heart rate signal can then be computed from the first and second light information, for example, by using blind source separation and/or cross-correlation.
59 Citations
27 Claims
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1. A method of an electronic device including a plurality of light emitters, a plurality of light sensors, and a plurality of light guides, the method comprising:
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emitting light from a first light emitter through a first light guide, wherein the first light emitter is located a first distance away from a tissue of a user; receiving first light information from the first light guide; emitting light from a second light emitter through a second light guide, wherein the second light emitter is located a second distance, greater than the first distance, away from the tissue of the user; receiving second light information from the second light guide; and computing a heart rate signal based on the first and second light information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9-16. -16. (canceled)
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17. An electronic device, comprising:
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a first light guide; a first light emitter configured to emit light through the first light guide; a first light sensor configured to receive first light information from the first light guide; a second light guide; a second light emitter configured to emit light through the second light guide; a second light sensor configured to receive second light information from the second light guide; and processor configured to; compute a heart rate signal based on the first and second light information. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification