US 11,806,168 B2
Physiological detection system with adjustable signal source
Sheau-Foong Chong, Penang (MY); and Chun-Wei Chen, Hsin-Chu County (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu County (TW)
Filed by PixArt Imaging Inc., Hsin-Chu County (TW)
Filed on Jan. 23, 2019, as Appl. No. 16/254,923.
Application 16/254,923 is a continuation of application No. 14/825,272, filed on Aug. 13, 2015, granted, now 10,244,987.
Prior Publication US 2019/0150845 A1, May 23, 2019
Int. Cl. A61B 5/00 (2006.01); A61B 5/1455 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/7221 (2013.01) [A61B 5/02416 (2013.01); A61B 5/1455 (2013.01); A61B 5/14551 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A physiological detection system, comprising:
a physiological detection module comprising:
a light source configured to provide light to illuminate a skin region;
an image sensor configured to detect light passing the skin region using a focus length and output an image signal;
a first processor configured to calculate a first confident level according to the image signal and adjust the focus length according to the first confident level; and
an application module, coupled to the physiological detection module to receive an intensity variation signal, and comprising a second processor configured to calculate a second confident level according to the intensity variation signal, and the focus length is further adjusted according to the second confident level.