US 12,064,224 B2
Concentric architecture for optical sensing
Ueyn L. Block, Menlo Park, CA (US); Guocheng Shao, San Jose, CA (US); Itaru L. Hiromi, Cupertino, CA (US); Mathieu Charbonneau-LeFort, San Jose, CA (US); and Tobias J. Harrison-Noonan, San Francisco, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Feb. 18, 2022, as Appl. No. 17/675,399.
Application 17/675,399 is a continuation of application No. 16/126,970, filed on Sep. 10, 2018, granted, now 11,266,320.
Claims priority of provisional application 62/563,594, filed on Sep. 26, 2017.
Prior Publication US 2022/0167864 A1, Jun. 2, 2022
Int. Cl. A61B 5/024 (2006.01); A61B 5/00 (2006.01); A61B 5/026 (2006.01); A61B 5/0295 (2006.01); A61B 5/1455 (2006.01); H01L 25/16 (2023.01); H01L 31/0232 (2014.01); H01L 31/16 (2006.01)
CPC A61B 5/02433 (2013.01) [A61B 5/02438 (2013.01); A61B 5/0261 (2013.01); A61B 5/0295 (2013.01); A61B 5/14551 (2013.01); A61B 5/681 (2013.01); H01L 25/167 (2013.01); H01L 31/02327 (2013.01); H01L 31/16 (2013.01); A61B 2562/0238 (2013.01); A61B 2562/0242 (2013.01); A61B 2562/046 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wearable electronic device comprising:
a device housing;
a strap attached to the device housing and configured to retain the device housing on a user's wrist;
a processor positioned within the device housing; and
an optical sensing unit positioned at least partially within the device housing and comprising:
a central region;
a peripheral region surrounding the central region;
a first light emitter positioned in the central region and configured to emit first light in a first wavelength range;
a second light emitter positioned in the central region and configured to emit second light in a second wavelength range that is different from the first wavelength range;
a set of light detectors positioned in the peripheral region and configured to detect the first light and the second light, the set of light detectors at least partially surrounding the first light emitter and the second light emitter; and
a selective transparent layer positioned in the peripheral region and comprising:
a first section positioned over a light detector of the set of light detectors and transparent to the second wavelength range; and
a second section surrounding the first section, the second section at least partially transparent to the first wavelength range and opaque to the second wavelength range.