公开(公告)号：US20210059585A1

公开(公告)日：2021-03-04

申请号：US17001902

申请日：2020-08-25

Applicant: NANOLAMBDA KOREA

Inventor： Byung IL CHOI ,  Cheng-Chun CHANG ,  Chien-Ta WU

IPC: A61B5/1455 ,  H01L31/02 ,  H01L31/0203 ,  H01L31/0216 ,  H01L31/173 ,  A61B5/00 ,  G01N21/31

Abstract: A chip-scale integrated multi-wavelength biological sensing device employing a plurality of filter-sensor assemblies is provided. The plurality of filter-sensor assemblies can include sufficient number of optical channels enabled by plasmonic filters having different nanoscale patterns and provided directly on an array of photodetectors. Combined with simultaneous illumination of light including multiple peak wavelengths with small full width at half maximum values, the independent optical channels of the plurality of filter-sensor assemblies enable correlation of detected optical signals with biological parameters. Signal processing methods for robustly extracting The PPG signals can be extracted by a robust signal processing method. Successful measurement of peripheral blood oxygen (SpO2) and blood pressure has been demonstrated.

公开(公告)号：US20190041263A1

公开(公告)日：2019-02-07

申请号：US16051834

申请日：2018-08-01

Applicant: NANOLAMBDA KOREA

Inventor： Byung IL CHOI

IPC: G01J3/02 ,  G01J3/28 ,  G01J3/12

Abstract: An array of sensor pixels is formed on a substrate, and a signal processing unit is connected to the array of sensor pixels. The signal processing unit includes multiple spectral channels that are defined by a respective transmission curve of each optical filter of at least one associated sensor pixel. Each of the sensor pixels includes a stack of a respective photodetector and a respective optical filter. Each spectral channel receives an output signal from one or more sensor pixels including an optical filter having the same transmission curve. At least one spectral channel has a greater number of sensor pixels than another spectral channel among the multiple spectral channels. The different number of pixels for the spectral channels can be employed to compensate for variations of sensor efficiency as a function of wavelength. Adjustment to sensor gain can be minimized through use of different number of pixels for different spectral channels.