REFLECTIVE SURFACES FOR PPG SIGNAL DETECTION
First Claim
1. An electronic device comprising:
- one or more light emitters configured to generate one or more light paths through one or more apertures;
one or more sensors configured to detect a reflection of the one or more light paths;
one or more reflective surfaces in contact with the one or more apertures; and
logic coupled to the one or more sensors and configured to detect a signal from the one or more reflected light paths.
1 Assignment
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Accused Products
Abstract
Reflective surfaces for the apertures of PPG optical components in PPG systems is disclosed. In a PPG system or device, the addition of reflective surfaces around, under, or near the apertures of the optical components can enhance the amount of light received by the light detector. As a result, the measured PPG signal strength can be higher and more accurate compared to the same PPG device without reflective surfaces. The reflective surfaces can reflect and/or recycle light that is incident upon the reflective surfaces back into the skin for eventual capture of the light by the light detectors. In some examples, the reflective surfaces can be diffuse or specular reflectors and/or can be configured to selectively reflect one or more wavelengths of light. In some examples, the back crystal and/or component mounting plane of the PPG system can be made of the same material as the reflective surfaces.
97 Citations
20 Claims
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1. An electronic device comprising:
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one or more light emitters configured to generate one or more light paths through one or more apertures; one or more sensors configured to detect a reflection of the one or more light paths; one or more reflective surfaces in contact with the one or more apertures; and logic coupled to the one or more sensors and configured to detect a signal from the one or more reflected light paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for determining a physiological signal from an electronic device, the method comprising:
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emitting light through one or more apertures to generate one or more light paths; receiving light from a reflection of the one or more light paths off at least one or more reflective surfaces in contact with the one or more apertures; and determining the physiological signal from the received light. - View Dependent Claims (17, 18, 19)
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20. A method of a first device communicating with a second device, the method comprising:
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sending, to a second device, a measured reflected signal from one or more reflective surfaces in contact with one or more apertures of the first device; and receiving, from the second device, a physiological signal.
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Specification