Patents by Inventor KA RAM CHOI

KA RAM CHOI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11986271
    Abstract: An apparatus for measuring a bio-signal includes: a light source configured to emit light; an ultrasonic transducer configured to obtain a photoacoustic signal generated from an object; a photoacoustic coupler disposed in contact with the ultrasonic transducer and configured to direct the light transmitted from the light source to a scanner and to direct the photoacoustic signal generated from the object to the ultrasonic transducer; the scanner configured to reflect the light incident from the photoacoustic coupler to the object, and reflect the photoacoustic signal generated from the object to the photoacoustic coupler; a scanner controller configured to adjust a light incident position on the object by controlling the angle of the scanner; a light detector configured to obtain a light signal by detecting the light scattered or reflected from the object; and a processor configured to obtain bio-information based on the light signal and the photoacoustic signal.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: May 21, 2024
    Assignees: SAMSUNG ELECTRONICS CO., LTD., POSTECH Research and Business Development Foundation
    Inventors: Sung Hyun Nam, Chulhong Kim, Ka Ram Choi, Jin Young Kim, Jin Woo Baik, Joongho Ahn
  • Patent number: 11925438
    Abstract: An apparatus for estimating body temperature of an object is provided. The apparatus for estimating body temperature includes: a sensor configured to obtain spectra through a plurality of light paths of an object; and a processor configured to obtain a temperature slope between temperatures corresponding to the plurality of light paths based on the spectra of the plurality of light paths and a reference spectrum measured at a reference temperature, and estimate the body temperature of the object based on the temperature slope.
    Type: Grant
    Filed: October 17, 2022
    Date of Patent: March 12, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Hyun Nam, So Young Lee, Ka Ram Choi
  • Patent number: 11911188
    Abstract: Provided is an apparatus for non-invasively monitoring a health condition. The apparatus for monitoring health according to an example embodiment of the disclosure includes: a pulse wave sensor configured to obtain a first pulse wave signal in a first contact state of an object and a second pulse wave signal in a second contact state of the object; and a processor configured to estimate a degree of vasodilation based on an alternating current (AC) component of each of the first pulse wave signal and the second pulse wave signal, configured to monitor a vascular health condition based on the estimated degree of vasodilation, and configured to output a result of monitoring the vascular health condition.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: February 27, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: So Young Lee, Jeong Eun Hwang, Ka Ram Choi
  • Patent number: 11815454
    Abstract: A method of transforming Monte Carlo (MC) simulations for diffuse reflectance spectroscopy (DRS) may include obtaining, by a DRS device, MC simulated DRS measurements using a pre-defined number of photons; pre-processing, by the DRS device, the MC simulated DRS measurements to obtain normalized DRS measurements; correcting, by the DRS device, non-monotonicity of the normalized DRS measurements to obtain monotonic DRS measurements; converting, by the DRS device, the monotonic DRS measurements to a logarithmic domain to obtain logarithmic DRS measurements; performing, by the DRS device, curve fitting on the logarithmic DRS measurements in the logarithmic domain to obtain curve-fitted logarithmic DRS measurements; and transforming, by the DRS device, the curve-fitted logarithmic DRS measurements to a non-logarithmic domain to obtain transformed MC simulated DRS measurements.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: November 14, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sreejith Kallummil, Sujit Jos, Ibrahim A, Ka Ram Choi, Sang Kyu Kim
  • Patent number: 11786151
    Abstract: An apparatus for obtaining a target signal spectrum includes: a spectrum measurer configured to measure a plurality of spectra from an object; and a processor configured to obtain a difference spectrum matrix by subtracting a reference spectrum from each of the plurality of spectra, and to obtain a spectrum of a target signal based on the obtained difference spectrum matrix.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: October 17, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka Ram Choi, So Young Lee, Jun Ho Lee, Sang Kyu Kim, Hyeong Seok Jang
  • Patent number: 11723596
    Abstract: A healthcare apparatus according to an embodiment includes: a plurality of light sources configured to emit light of different wavelengths onto an object; a light detector configured to measure an optical signal of each of the wavelengths by receiving light reflected or scattered from the object; and a processor configured to obtain a blood glucose level and a blood flow index by using the optical signal of each of the wavelengths, and to estimate at least one from among dietary information and dietary metabolism state information by monitoring a blood glucose level change and a blood flow index change after ingestion of a food.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: August 15, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka Ram Choi, Hyo Sun Hwang, Jin Young Park, Jae Wook Shim, So Young Lee, Sang Kon Bae, Eui Seok Shin
  • Patent number: 11717171
    Abstract: An apparatus for estimating body temperature of an object is provided. The apparatus for estimating body temperature includes: a sensor configured to obtain spectra through a plurality of light paths of an object; and a processor configured to obtain a temperature slope between temperatures corresponding to the plurality of light paths based on the spectra of the plurality of light paths and a reference spectrum measured at a reference temperature, and estimate the body temperature of the object based on the temperature slope.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: August 8, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Hyun Nam, So Young Lee, Ka Ram Choi
  • Publication number: 20230200744
    Abstract: An apparatus for estimating a target component may include: a spectrometer configured to acquire training spectra; and a processor configured to extract a set number of principal components from the training spectra, determine whether the set number of principal components is appropriate based on randomness of residual in the set number of principal components, and based on the set number of principal components being determined to be appropriate, generate a target component estimation model based on the set number of principal components.
    Type: Application
    Filed: April 18, 2022
    Publication date: June 29, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka Ram CHOI, June Young Lee, Ho Jun Chang
  • Publication number: 20230157551
    Abstract: An apparatus for measuring a bio-signal includes: a light source configured to emit light; an ultrasonic transducer configured to obtain a photoacoustic signal generated from an object; a photoacoustic coupler disposed in contact with the ultrasonic transducer and configured to direct the light transmitted from the light source to a scanner and to direct the photoacoustic signal generated from the object to the ultrasonic transducer; the scanner configured to reflect the light incident from the photoacoustic coupler to the object, and reflect the photoacoustic signal generated from the object to the photoacoustic coupler; a scanner controller configured to adjust a light incident position on the object by controlling the angle of the scanner; a light detector configured to obtain a light signal by detecting the light scattered or reflected from the object; and a processor configured to obtain bio-information based on the light signal and the photoacoustic signal.
    Type: Application
    Filed: February 22, 2022
    Publication date: May 25, 2023
    Applicants: SAMSUNG ELECTRONICS CO., LTD., POSTECH Research and Business Development Foundation
    Inventors: Sung Hyun NAM, Chulhong KIM, Ka Ram CHOI, Jin Young KIM, Jin Woo BAIK, Joongho AHN
  • Patent number: 11642087
    Abstract: A method and apparatus for pre-processing a photoplethysmogram (PPG) signal include receiving, by an apparatus, the PPG signal including a plurality of pulses, obtaining, by the apparatus, a smoothed PPG signal based on smoothing the PPG signal using a moving average filter, obtaining, by the apparatus, a drift removed PPG signal based on removing drift from the smoothed PPG signal using a fitted polynomial function, and obtaining, by the apparatus, a rectified PPG signal based on correcting a motion artifact of the drift removed PPG signal by replacing each of the plurality of pulses using a combination of a global signal pulse and a corresponding local signal pulse.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: May 9, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ibrahim Abdul Majeed, Sujit Jos, Rahul Arora, Ka Ram Choi, Sang Kon Bae
  • Patent number: 11607178
    Abstract: The present disclosure relates to a method and system for processing a photoplethysmogram (PPG) signal to improve accuracy of measurement of physiological parameters of a subject. The method may include removing a baseline drift from the PPG signal; obtaining a drift removed signal; filtering the drift removed signal; obtaining a filtered signal; performing motion artifact correction on the filtered signal; and obtaining a corrected signal.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: March 21, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Rahul Arora, Sujit Jos, Ibrahim Abdul Majeed, Ka Ram Choi, Sang Kon Bae
  • Publication number: 20230034618
    Abstract: An apparatus for estimating body temperature of an object is provided. The apparatus for estimating body temperature includes: a sensor configured to obtain spectra through a plurality of light paths of an object; and a processor configured to obtain a temperature slope between temperatures corresponding to the plurality of light paths based on the spectra of the plurality of light paths and a reference spectrum measured at a reference temperature, and estimate the body temperature of the object based on the temperature slope.
    Type: Application
    Filed: October 17, 2022
    Publication date: February 2, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Hyun NAM, So Young Lee, Ka Ram Choi
  • Patent number: 11564622
    Abstract: An apparatus for generating a metabolism model may include a processor configured to obtain a predetermined number of bio-information profiles from a bio-sensor, extract a representative bio-information profile from the obtained predetermined number of bio-information profiles, and generate the metabolism model for correcting an error of the bio-sensor by using the extracted representative bio-information profile.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: January 31, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang Kyu Kim, So Young Lee, Ka Ram Choi
  • Publication number: 20230009905
    Abstract: An apparatus for estimating blood glucose is provided. The apparatus for estimating blood glucose may include a spectrometer configured to measure a spectrum from an object, and a processor configured to monitor a change in a contact state between the object and the spectrometer, determine a calibration section based on the monitored change in the contact state, extract a background signal from a spectrum of the determined calibration section, and generate a personalized blood glucose estimation model based on the extracted background signal.
    Type: Application
    Filed: April 20, 2022
    Publication date: January 12, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Ka Ram CHOI, So Young Lee, Ho Jun Chang, Yun S Park, Hyeong Seok Jang
  • Patent number: 11517223
    Abstract: An apparatus for estimating blood glucose using a photoplethysmography (PPG) signal is provided. The apparatus for estimating blood glucose includes: a pulse wave sensor configured to obtain a pulse wave signal from an object; and a processor configured to obtain at least two points from a waveform of the pulse wave signal, to extract a feature based on time values of the obtained at least two points, and to estimate blood glucose based on the extracted feature.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: December 6, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka Ram Choi, Sang Kon Bae, So Young Lee, Seung Keun Yoon
  • Patent number: 11399746
    Abstract: A personalized bio-information correcting apparatus includes a communication interface configured to acquire original bio-information value data of a user, and a processor configured to obtain a personalized bio-information guideline, based on a personalized physiological model, identify whether at least one value among the acquired original bio-information value data is an outlier, based on the obtained personalized bio-information guideline, and based on the at least one value among the acquired original bio-information value data being identified to be the outlier, obtain final bio-information value data by correcting the at least one value among the acquired original bio-information value data.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: August 2, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka Ram Choi, So Young Lee
  • Publication number: 20220160239
    Abstract: An apparatus for estimating body temperature of an object is provided. The apparatus for estimating body temperature includes: a sensor configured to obtain spectra through a plurality of light paths of an object; and a processor configured to obtain a temperature slope between temperatures corresponding to the plurality of light paths based on the spectra of the plurality of light paths and a reference spectrum measured at a reference temperature, and estimate the body temperature of the object based on the temperature slope.
    Type: Application
    Filed: March 30, 2021
    Publication date: May 26, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Hyun NAM, So Young LEE, Ka Ram CHOI
  • Publication number: 20220104776
    Abstract: A method of optimizing a bio-information estimation model by reflecting temperature variation characteristics for each wavelength is disclosed. According to an embodiment of the present disclosure, the method of optimizing a bio-information estimation model includes: obtaining a plurality of spectra according to a temperature variation; obtaining a rate of change in absorbance at each wavelength of the plurality of spectra according to the temperature variation by subtracting a reference spectrum from the plurality of spectra; generating a characteristic matrix for each wavelength based on the rate of change in absorbance at each wavelength according to the temperature variation; obtaining a temperature signal spectrum based on the characteristic matrix for each wavelength; and optimizing a bio-information estimation model based on the temperature signal spectrum.
    Type: Application
    Filed: April 7, 2021
    Publication date: April 7, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka Ram CHOI, So Young Lee, Jun Ho Lee, Sang Kyu Kim
  • Patent number: 11291374
    Abstract: Provided is an apparatus for estimating bio-information which estimates bio-information from a user. The apparatus for estimating bio-information according to an embodiment of the present disclosure includes: a spectrometer configured to obtain, absorbance from a user; a physiological information obtainer configured to obtain metabolic and physiological information including a concentration of carbon dioxide (CO2); and a processor configured to estimate bio-information based on the absorbance and the metabolic, and physiological information by using a predictive model corresponding to the obtained metabolic and physiological information.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: April 5, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: So Young Lee, Ka Ram Choi
  • Publication number: 20220061755
    Abstract: A healthcare apparatus according to an embodiment includes: a plurality of light sources configured to emit light of different wavelengths onto an object; a light detector configured to measure an optical signal of each of the wavelengths by receiving light reflected or scattered from the object; and a processor configured to obtain a blood glucose level and a blood flow index by using the optical signal of each of the wavelengths, and to estimate at least one from among dietary information and dietary metabolism state information by monitoring a blood glucose level change and a blood flow index change after ingestion of a food.
    Type: Application
    Filed: November 9, 2021
    Publication date: March 3, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ka Ram CHOI, Hyo Sun HWANG, Jin Young PARK, Jae Wook SHIM, So Young LEE, Sang Kon BAE, Eui Seok SHIN