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US 12,230,393 B2Granted
Multiple wavelength sensor emitters
AssigneeWillow Laboratories, Inc.
InventorsRobert A. Smith, David Dalke, Ammar Al-Ali, Mohamed K Diab, Marcelo M. Lamego
Life of this patent
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Abstract
A physiological sensor has light emitting sources, each activated by addressing at least one row and at least one column of an electrical grid. The light emitting sources are capable of transmitting light of multiple wavelengths and a detector is responsive to the transmitted light after attenuation by body tissue.
Claims7
A physiological monitoring device comprising:
- at least two groups of LEDs coupled to a substrate, the at least two groups of LEDs configured to emit light of at least two different wavelengths, wherein each group comprises at least a plurality of LEDs, wherein a thermal mass of the substrate stabilizes a bulk temperature of the at least two groups of LEDs;
- at least one detector configured to detect at least a portion of the light emitted from the at least two groups of LEDs after at least a portion of the light has been attenuated by tissue, the at least one detector configured to output at least one signal responsive to the detected light;
- a substrate temperature sensor coupled to the substrate, wherein the substrate temperature sensor is configured to measure a temperature of the substrate and wherein the temperature of the substrate is responsive to the bulk temperature of the at least two groups of LEDs;
- and
- at least one hardware processor configured to:
- control an operating condition of the physiological monitoring device based on the bulk temperature of the at least two groups of LEDs;
- and
- process one or more signals responsive to the outputted at least one signal to determine a physiological parameter of a user responsive to the one or more signals.
5 more elements
Dependencies are inferred from the claim text.