US 12,446,784 B2
Apparatus and method for estimating blood pressure, and sensor for estimating the same
Sang Yun Park, Hwaseong-si (KR); Jae Min Kang, Seoul (KR); Tak Hyung Lee, Seoul (KR); Byung Hoon Ko, Hwaseong-si (KR); Seung Woo Noh, Seongnam-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. 17/748,425.
Claims priority of application No. 10-2021-0185976 (KR), filed on Dec. 23, 2021.
Prior Publication US 2023/0200665 A1, Jun. 29, 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 5/02416 (2013.01); A61B 5/7235 (2013.01); A61B 2562/0247 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for estimating a blood pressure, the apparatus comprising:
a sensor configured to measure a photoplethysmography (PPG) signal and a contact pressure signal from an object that is in contact with the sensor; and
a processor configured to estimate a blood pressure based on the PPG signal and the contact pressure signal which are measured by the sensor,
wherein the sensor comprises:
a transparent elastic body;
a first polarizing film provided on a surface of the transparent elastic body and configured to come into contact with the object;
a light source provided under the transparent elastic body and configured to emit a light toward the object;
a first detector provided under the transparent elastic body and configured to detect a light, passing through the first polarizing film after being emitted by the light source and scattered or reflected from the object, to measure the PPG signal; and
a second detector provided under the transparent elastic body and configured to detect a light, not passing through the first polarizing film, to measure the contact pressure signal.