US 11,666,277 B2
Apparatus and method for estimating biometric information
Young Zoon Yoon, Hwaseong-si (KR); Jae Min Kang, Seoul (KR); Yong Joo Kwon, Yongin-si (KR); Seung Woo Noh, Seongnam-si (KR); and Sang Yun Park, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Oct. 14, 2020, as Appl. No. 17/70,159.
Application 17/070,159 is a continuation of application No. 15/654,422, filed on Jul. 19, 2017, granted, now 10,820,858.
Claims priority of application No. 10-2016-0132228 (KR), filed on Oct. 12, 2016.
Prior Publication US 2021/0085246 A1, Mar. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/024 (2006.01); A61B 5/00 (2006.01); A61B 5/021 (2006.01); A61B 5/0245 (2006.01); A61B 5/316 (2021.01); A61B 5/318 (2021.01); A61B 5/0205 (2006.01)
CPC A61B 5/681 (2013.01) [A61B 5/0205 (2013.01); A61B 5/0245 (2013.01); A61B 5/02125 (2013.01); A61B 5/02416 (2013.01); A61B 5/02438 (2013.01); A61B 5/316 (2021.01); A61B 5/318 (2021.01); A61B 5/7207 (2013.01); A61B 5/7235 (2013.01); A61B 2560/0468 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wristwatch-type device comprising:
a main body;
a strap connected to the main body and configured to wrap around a wrist of a user;
a display provided on the main body and configured to receive a touch input from the user;
an electrocardiogram (ECG) sensor comprising:
a first electrode disposed at a lower part of the main body to be in contact with the wrist of the user when the user wears the wristwatch-type device; and
a second electrode disposed at a first part of the main body, which is different from the lower part, to be in contact with a finger of the user,
wherein the ECG sensor is configured to measure an ECG signal of the user using the first electrode and the second electrode,
a first pulse wave sensor disposed at the lower part of the main body and configured to measure a wrist photoplethysmogram (PPG) signal at the wrist;
a second pulse wave sensor disposed at a second part of the main body, which is different from the lower part, and configured to measure a finger PPG signal from the user; and
a processor configured to, based on the touch input,
perform a differentiation function on the finger PPG signal and the wrist PPG signal to obtain a derivative finger PPG signal and a derivative wrist PPG signal, respectively,
obtain a differential pulse transit time between the finger PPG signal and the wrist PPG signal, based on time differences between local minimum points of the derivative finger PPG signal and corresponding local minimum points of the derivative wrist PPG signal, respectively, and
obtain biometric information using the ECG signal, the finger PPG signal, the wrist PPG signal, and the differential pulse transit time between the finger PPG signal and the wrist PPG signal.