US 11,998,304 B2
Ring for optically measuring biometric data
Jaclyn Leverett Wasson, Alameda, CA (US); Peter W. Richards, San Francisco, CA (US); Lindsey Michelle Sunden, San Francisco, CA (US); Corey Stephen O'Connor, Walnut Creek, CA (US); Conor Joseph Heneghan, Campbell, CA (US); Xi Zhang, San Francisco, CA (US); Hamed Vavadi, Fremont, CA (US); Chris Hanrahan Sarantos, San Francisco, CA (US); and Peter Colin Dess, San Francisco, CA (US)
Assigned to FITBIT, INC., San Francisco, CA (US)
Filed by Fitbit, Inc., San Francisco, CA (US)
Filed on Dec. 16, 2020, as Appl. No. 17/123,248.
Application 17/123,248 is a continuation of application No. 16/439,467, filed on Jun. 12, 2019, granted, now 10,918,289.
Prior Publication US 2021/0169345 A1, Jun. 10, 2021
Int. Cl. A61B 5/1455 (2006.01); A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/145 (2006.01); G01N 21/3577 (2014.01); G01N 33/49 (2006.01); A61B 5/021 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/0205 (2013.01) [A61B 5/0002 (2013.01); A61B 5/14532 (2013.01); A61B 5/14535 (2013.01); A61B 5/14546 (2013.01); A61B 5/14552 (2013.01); A61B 5/6826 (2013.01); G01N 21/3577 (2013.01); G01N 33/4925 (2013.01); A61B 5/021 (2013.01); A61B 5/02438 (2013.01); A61B 2562/0219 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A monitoring device, comprising:
a housing, wherein the housing is a ring-shaped housing having an opening configured to at least partially receive a digit of a wearer;
at least two light sources directed toward the opening of the housing and configured to emit light over at least two wavelengths;
at least one photodetector;
at least one processor;
a motion-detecting sensor positioned in the housing and configured to detect motion data representative of motion of the monitoring device; and
memory including instructions that, when executed by the at least one processor, cause the monitoring device to:
activate the at least two light sources;
acquire data to determine which of the at least two light sources have adequate contact with skin of the wearer;
analyze the data to determine which, if any, of the at least two light sources have adequate contact with the skin of the wearer and which, if any, of the at least two light sources do not have adequate contact with the skin of the wearer by identifying measurements having sudden changes or low variance;
deactivate any of the at least two light sources only if any of the at least two light sources are determined to not have adequate contact with the skin of the wearer;
if it is determined that at least one light source has adequate contact with the skin of the wearer, detect, using the at least one photodetector, light emitted by the at least one light source having adequate contact with the skin of the wearer and corresponding to at least one light paths, wherein light activation and detection are triggered by a determination that motion data is indicative of the monitoring device being substantially still; and
determine biometric information when light passes through the digit of the wearer based on the light detected by the at least one photodetector.