Wearable device with physiological parameters monitoring
A wearable health monitoring device can include a physiological parameter measurement sensor or module configured to be in contact with a wearer's skin when the device is worn by the wearer on the wrist. The physiological parameter measurement sensor can noninvasively and optionally continuously measure one or more physiological parameters, for example, the oxygen saturation, of the wearer. The sensor can include a convex curvature to improve pressure, and therefore optical coupling, between the wearer's skin and the physiological parameter measurement sensor while balancing the pressure and the wearer's comfort. The sensor can include a light barrier between emitters and detectors and other light barriers to improve signal strength and reduce noise.
1. An optical physiological sensor integrated into a watch configured to monitor health of a wearer, the optical physiological sensor configured to face a tissue of the wearer when the watch is worn by the wearer, the optical physiological sensor configured to measure physiological parameters of the wearer using information from the optical physiological sensor, the optical physiological sensor comprising:
a first emitter grouping comprising a first plurality of light emitting diodes (LEDs);
a second emitter grouping comprising a second plurality of LEDs, wherein the second emitter grouping comprises a same number and type of LEDs as the first emitter grouping, and wherein the first emitter grouping and the second emitter grouping are adjacent to each other;
one or more light blocks separating the first emitter grouping from the second emitter grouping;
light diffusing material configured to diffuse light emitted by each of the first and second pluralities of LEDs;
a plurality of detectors including four or more photodiodes; and
a surface configured to be positioned between (i) the tissue of the wearer and (ii) all of the first and second emitter groupings and the four or more photodiodes, the surface comprising one or more surface materials.
2. The optical physiological sensor of claim 1 , wherein the one or more surface materials comprise at least a portion of the one or more light blocks and a light transmission material.
3. The optical physiological sensor of claim 1 , wherein the LEDs in the first or second emitter grouping are not electrically connected to one another.
4. The optical physiological sensor of claim 1 , wherein the first or second emitter grouping defines a group of emitters located in close proximity.
5. The optical physiological sensor of claim 1 , wherein the plurality of detectors are individually both a near detector and far detector for each of the first emitter grouping and the second emitter grouping.
6. The optical physiological sensor of claim 1 , wherein the first and second emitter groupings are located at non-central locations of a printed circuit board (PCB) of the optical physiological sensor.
7. The optical physiological sensor of claim 1 , wherein the one or more light blocks extend from a surface of the optical physiological sensor positioning the first and second pluralities of LEDs and past the first and second pluralities of LEDs towards the tissue of the wearer when the watch is worn.
8. The optical physiological sensor of claim 1 , wherein each of the first or second emitter grouping is surrounded by its own diffusing material.
9. The optical physiological sensor of claim 1 , wherein at least some of the plurality of detectors extend around a circumference of the optical physiological sensor.
10. The optical physiological sensor of claim 9 , wherein the plurality of detectors are positioned in a grid pattern and/or across from one another.
11. The sensor optical physiological of claim 9 , wherein locations of the first and second emitter groupings are interleaved with the plurality of detectors.
12. A watch comprising the optical physiological sensor of claim 1 , further comprising a processor configured to determine an oxygen saturation measurement based on signals from the optical physiological sensor.
13. The watch of claim 12 , further comprising one or more of an ECG sensor; one or more temperature sensors; or an accelerometer.
14. The watch of claim 12 , further comprising a display screen to display one or both of the oxygen saturation measurement or a heart rate measurement.
15. The optical physiological sensor of claim 1 , further comprising light diffusing material positioned around each of the plurality of detectors.
16. The optical physiological sensor of claim 1 , wherein the surface is a convex surface.
17. An optical physiological sensor integrated into a watch configured to monitor health of a wearer, the optical physiological sensor configured to face a tissue of the wearer when the watch is worn by the wearer, the optical physiological sensor configured to measure physiological parameters of the wearer using information from the optical physiological sensor, the optical physiological sensor comprising:
a first emitter grouping comprising a first plurality of light emitting diodes (LEDs) at a first location;
a second emitter grouping comprising a second plurality of LEDs at a second location different from the first location, wherein the second emitter grouping comprises a same number and type of LEDs as the first emitter grouping;
one or more light blocks separating the first emitter grouping from the second emitter grouping;
a plurality of detectors including four or more photodiodes;
light diffusing material positioned between the plurality of detectors and the tissue of the wearer; and
a surface configured to be positioned between (i) the tissue of the wearer and (ii) all of the first and second emitter groupings and the four or more photodiodes, the surface comprising one or more surface materials.
18. The optical physiological sensor of claim 17 , wherein the first location is adjacent to the second location.
19. The optical physiological sensor of claim 17 , wherein the one or more surface materials comprise at least a portion of the one or more light blocks and a light transmission material.
20. The optical physiological sensor of claim 17 , wherein the one or more light blocks extend from a surface of the optical physiological sensor positioning the first and second pluralities of LEDs and past the first and second pluralities of LEDs towards the tissue of the wearer when the watch is worn.
21. The optical physiological sensor of claim 17 , wherein the plurality of detectors are individually both a near detector and far detector for each of the first emitter grouping and the second emitter grouping.
22. The optical physiological sensor of claim 17 , wherein at least some of the plurality of detectors extend around a circumference of the optical physiological sensor.
23. The optical physiological sensor of claim 17 , wherein each of the first or second emitter grouping is surrounded by its own diffusing material.
24. The optical physiological sensor of claim 17 , wherein the surface is a convex surface.