US 12,290,343 B2
Apparatus and method for estimating bio-information
Tak Hyung Lee, Seoul (KR); Byung Hoon Ko, Hwaseong-si (KR); Seung Woo Noh, Seongnam-si (KR); Sang Yun Park, Hwaseong-si (KR); and Jin Woo Choi, Ansan-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on May 19, 2022, as Appl. No. 17/748,187.
Claims priority of application No. 10-2022-0022557 (KR), filed on Feb. 21, 2022.
Prior Publication US 2023/0263412 A1, Aug. 24, 2023
Int. Cl. A61B 5/021 (2006.01); A61B 5/00 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/02116 (2013.01) [A61B 5/02125 (2013.01); A61B 5/02416 (2013.01); A61B 5/681 (2013.01); A61B 5/7235 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An apparatus for estimating bio-information, the apparatus comprising:
a main body;
a photoplethysmogram (PPG) sensor disposed in the main body and configured to measure a PPG signal from an object of a user;
a composite sensor disposed in a closed space formed in the main body, and configured to measure, in a first time period, a change in volume of the closed space and determine a pressure applied to the closed space based on the change in the volume of the closed space when the object applies force to a surface of the main body, and measure, in a second time period different from the first time period, an external atmospheric pressure,
wherein the composite sensor comprises
an opening and closing part;
a composite sensor driver configured to:
set the opening and closing part to a closed state that prevents entry of external air when the composite sensor measures the pressure applied to the closed space in the first time period, and
set the opening and closing part to an open state that allows entry of external air when the composite sensor measures the external atmospheric pressure in the second time period; and
a processor configured to determine a contact pressure between the object and the PPG sensor based on the pressure applied to the closed space and the external atmospheric pressure, and estimate the bio-information of the user based on the PPG signal and the contact pressure.