US 12,257,039 B2
Heart rate detecting device capable of alleviating motion interference
Ren-Hau Gu, Hsin-Chu County (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu County (TW)
Filed by PixArt Imaging Inc., Hsin-Chu County (TW)
Filed on Aug. 31, 2021, as Appl. No. 17/462,622.
Application 17/462,622 is a continuation in part of application No. 15/460,893, filed on Mar. 16, 2017, abandoned.
Prior Publication US 2021/0393156 A1, Dec. 23, 2021
Int. Cl. A61B 5/024 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/02433 (2013.01) [A61B 5/02438 (2013.01); A61B 5/7271 (2013.01); A61B 2560/04 (2013.01); A61B 2562/0238 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A heart rate detecting device, comprising:
a first light source, configured to emit a first wavelength light;
a second light source, configured to emit a second wavelength light; and
an image sensor configured to generate a first mixed signal within a first interval upon the first light source and the second light source emitting light together and generate a second mixed signal within a second interval upon the first light source and the second light source emitting light together,
wherein the first wavelength light and the second wavelength light have a first intensity ratio within the first interval, and have a second intensity ratio, different from the first intensity ratio, within the second interval, and
decorrelation of the first mixed signal and the second mixed signal is configured to calculate a heart rate value.