US 11,717,228 B2
Heart rate detection device and physiological detection device
Ren-Hau Gu, Hsin-Chu County (TW); and Chih-Hsin Lin, Hsin-Chu County (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu County (TW)
Filed by PIXART IMAGING INC., Hsin-Chu County (TW)
Filed on Nov. 10, 2021, as Appl. No. 17/523,609.
Application 17/523,609 is a division of application No. 16/177,433, filed on Nov. 1, 2018, granted, now 11,224,384.
Prior Publication US 2022/0061769 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/00 (2006.01); A61B 5/024 (2006.01); A61B 5/0245 (2006.01); A61B 5/25 (2021.01)
CPC A61B 5/7207 (2013.01) [A61B 5/0006 (2013.01); A61B 5/0064 (2013.01); A61B 5/02416 (2013.01); A61B 5/0245 (2013.01); A61B 5/02405 (2013.01); A61B 5/02438 (2013.01); A61B 5/25 (2021.01); A61M 2205/3303 (2013.01)] 20 Claims
OG exemplary drawing
 
12. A heart rate detection device, comprising:
at least one light source configured to emit light covering multiple wavelengths to illuminate a first skin surface of a user in a first time interval and a second skin surface of the user in a second time interval;
a light detector configured to sense emergent light from the second skin surface in the second time interval and output multiple light detection signals associated with different light colors corresponding to the multiple wavelengths; and
a processor configured to perform a vector calculation between the multiple light detection signals and an intensity distribution, obtained according to emergent light from the first skin surface sensed by the light detector in the first time interval, of the different light colors to remove a motion artifact.