公开(公告)号：US20230293041A1

公开(公告)日：2023-09-21

申请号：US18202965

申请日：2023-05-29

Applicant: PixArt Imaging Inc.

Inventor： MING-CHANG LI

IPC: A61B5/08 ,  A61B5/00

CPC classification number: A61B5/0816 ,  A61B5/721 ,  A61B5/0077 ,  A61B2562/0219

Abstract: A respiration rate detection device including a photoplethysmography (PPG) detector, an acceleration detector and a processing unit is provided. The processing unit calculates an acceleration peak frequency in an acceleration frequency spectrum, and takes a PPG acceleration peak frequency in a PPG frequency spectrum corresponding to the acceleration peak frequency as a respiration rate.

公开(公告)号：US20190261890A1

公开(公告)日：2019-08-29

申请号：US16412500

申请日：2019-05-15

Applicant: PixArt Imaging Inc.

Inventor： MING-CHANG LI

IPC: A61B5/08 ,  A61B5/00

Abstract: A respiration rate detection device including a photoplethysmography (PPG) detector, an acceleration detector and a processing unit is provided. The processing unit calculates an acceleration peak frequency in an acceleration frequency spectrum, and takes a PPG acceleration peak frequency in a PPG frequency spectrum corresponding to the acceleration peak frequency as a respiration rate.

公开(公告)号：US20240245297A1

公开(公告)日：2024-07-25

申请号：US18628841

申请日：2024-04-08

Applicant: PixArt Imaging Inc.

Inventor： MING-CHANG LI ,  REN-HAU GU

IPC: A61B5/00 ,  A61B5/024 ,  A61B5/1455

CPC classification number: A61B5/0059 ,  A61B5/02427 ,  A61B5/02438 ,  A61B5/14558 ,  A61B5/7246 ,  A61B2562/046

Abstract: There is provided a physiological detection device including a light source, a light detector, a processing unit and a display device. The light source emits light to illuminate a skin surface. The light detector receives the light from the skin surface to output detected signals. The processing unit confirms an attached state according to the detected signals and controls the display device to show an indication signal or a warning message when the attached state is confirmed not good.

公开(公告)号：US20200029909A1

公开(公告)日：2020-01-30

申请号：US16595006

申请日：2019-10-07

Applicant: PixArt Imaging Inc.

Inventor： REN-HAU GU ,  YEN-MIN CHANG ,  MING-CHANG LI ,  CHIH-HSIN LIN

IPC: A61B5/00 ,  G16H50/30 ,  G16H40/63 ,  A61B5/024

Abstract: There is provided a system architecture including a PPG hardware module and a MEMS hardware module. The PPG hardware module processes PPG raw data, which is generally composed of analog signals or digital signals. The PPG hardware module filters the raw data for later digital calculation to, for example, find out frequency signals with higher peak values. The PPG hardware module then outputs the selected frequency signals to an MCU for heart rate calculation. The MEMS hardware module receives MEMS raw data from a motion detector made of MEMS elements. The MEMS raw data represents motion status of a user that could possibly affect the heart rate determination result. The MEMS hardware module filters the raw data for later digital calculation to find out frequency signals with higher peak values caused by motion.