Patents by Inventor Ho-Jun Chang

Ho-Jun Chang 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: 11911157
    Abstract: Provided is an apparatus for estimating a target component, the apparatus including a temperature controller configured to modulate temperature of an object, a measurer configured to measure a spectrum for each temperature of the object that changes based on the modulation, and a processor configured to obtain effective optical pathlength vectors corresponding to a temperature change based on the spectrum for each temperature of the object, obtain a representative effective optical pathlength based on the obtained effective optical pathlength vectors, and obtain a target component estimation model based on the obtained representative effective optical pathlength.
    Type: Grant
    Filed: May 13, 2021
    Date of Patent: February 27, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyeong Seok Jang, Sung Hyun Nam, Sung Mo Ahn, Jun Ho Lee, Ho Jun Chang
  • Patent number: 11898910
    Abstract: A Raman sensor includes a light source assembly having a plurality of light sources configured to emit light to a plurality of skin points of skin, each of the plurality of skin points having a predetermined separation distance from a light collection region of the skin from which Raman scattered light is collected; a light collector configured to collect the Raman scattered light from the light collection region of the skin; and a detector configured to detect the collected Raman scattered light.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: February 13, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Jun Chang, Sung Hyun Nam, Alexey Anikanov, Yun S Park, Eui Seok Shin, Woochang Lee
  • 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: 20230157645
    Abstract: An apparatus and method for estimating bio-information are provided. The apparatus for estimating bio-information includes: a spectrometer configured to measure a spectrum from an object according to measurement conditions; and a processor configured to obtain signal-to-noise ratio (SNR) values for each wavelength of the spectrum measured by the spectrometer, generate a plurality of simulated absorbance spectra based on the SNR values for each wavelength of the spectrum, and determine an optimal wavelength combination for use in measuring the bio-information based on the plurality of simulated absorbance spectra.
    Type: Application
    Filed: February 11, 2022
    Publication date: May 25, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: June Young LEE, Bok Soon Kwon, Jeong Yun Seo, Woo Chang Lee, Ho Jun Chang
  • Publication number: 20230118582
    Abstract: An apparatus for estimating bio-information, may include: a sensor part having a photoplethysmography (PPG) sensor configured to measure a PPG signal from an object of a user, and a force sensor configured to measure a contact force between the object and the PPG sensor; an output interface, which before the PPG signal is measured, is configured to output first guide information indicating a predetermined number of times the user is required to touch the sensor part, and second guide information indicating a number of times that the sensor part has been touched since the first guide information is output; and a processor configured to estimate bio-information of the user by using the PPG signal based on the number of times that the sensor has been touched since the first guide information is output, corresponding to the predetermined number of times the user is required to touch.
    Type: Application
    Filed: November 30, 2021
    Publication date: April 20, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang Mok CHOI, Tak Hyung LEE, Ho Jun CHANG
  • Patent number: 11627895
    Abstract: A apparatus for estimating concentration may include: a spectrum obtainer configured to obtain Raman spectra of an object; and a processor configured to extract, from the Raman spectra, at least one analyte spectrum related to an analyte and at least one non-analyte spectrum related to a biological component other than the analyte, and estimate concentration of the analyte based on a first area under a curve of the at least one analyte spectrum and a second area under a curve of the at least one non-analyte spectrum.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: April 18, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun S Park, Sung Hyun Nam, Woo Chang Lee, Ho Jun Chang
  • Publication number: 20230055190
    Abstract: A Raman sensor includes a light source assembly having a plurality of light sources configured to emit light to a plurality of skin points of skin, each of the plurality of skin points having a predetermined separation distance from a light collection region of the skin from which Raman scattered light is collected; a light collector configured to collect the Raman scattered light from the light collection region of the skin; and a detector configured to detect the collected Raman scattered light.
    Type: Application
    Filed: November 8, 2022
    Publication date: February 23, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Jun CHANG, Sung Hyun NAM, Alexey ANIKANOV, Yun S PARK, Eui Seok SHIN, Woochang LEE
  • 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: 11530948
    Abstract: A Raman sensor includes a light source assembly having a plurality of light sources configured to emit light to a plurality of skin points of skin, each of the plurality of skin points having a predetermined separation distance from a light collection region of the skin from which Raman scattered light is collected; a light collector configured to collect the Raman scattered light from the light collection region of the skin; and a detector configured to detect the collected Raman scattered light.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: December 20, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Jun Chang, Sung Hyun Nam, Alexey Anikanov, Yun S Park, Eui Seok Shin, Woochang Lee
  • Patent number: 11439327
    Abstract: An apparatus for measuring a Raman spectrum may include a processor configured to adjust a Raman probe parameter, set a Raman probe with the Raman probe parameter, obtain a first Raman spectrum of the sample at a first time point and a second Raman spectrum of the sample at a second time point, obtain a difference spectrum between the first Raman spectrum and the second Raman spectrum, determine a degree of similarity between the difference spectrum and an analyte Raman spectrum, determine an optimal Raman probe parameter based on the degree of similarity, and obtain a Raman spectrum of the sample for measuring bio-information by setting the Raman probe with the optimal Raman probe parameter.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: September 13, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun S Park, Woo Chang Lee, Ho Jun Chang
  • Publication number: 20220280078
    Abstract: Provided is an apparatus for estimating a target component, the apparatus including a temperature controller configured to modulate temperature of an object, a measurer configured to measure a spectrum for each temperature of the object that changes based on the modulation, and a processor configured to obtain effective optical pathlength vectors corresponding to a temperature change based on the spectrum for each temperature of the object, obtain a representative effective optical pathlength based on the obtained effective optical pathlength vectors, and obtain a target component estimation model based on the obtained representative effective optical pathlength.
    Type: Application
    Filed: May 13, 2021
    Publication date: September 8, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyeong Seok JANG, Sung Hyun NAM, Sung Mo AHN, Jun Ho LEE, Ho Jun CHANG
  • Patent number: 11193871
    Abstract: Provided is an apparatus for measuring particulate matter, the apparatus including an air inflow device configured to receive air including particulate matter particles, two or more light sources configured to respectively emit light of different wavelengths to the air received, a pattern measuring device configured to measure scattering patterns for each wavelength of light based on detecting light that is forward-scattered by the particulate matter particles and light that is back-scattered by the particulate matter particles, and a processor configured to obtain a size of the particulate matter particles and a concentration of the particulate matter particles based on the scattering patterns for each wavelength of light.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: December 7, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Jun Chang, Yun S Park, Woo Chang Lee
  • Patent number: 11112363
    Abstract: Provided is an apparatus for measuring particulate matter including an image obtaining device configured to charge particulate matter particles included in air that is introduced to the image obtaining device, and to obtain an image of the charged particulate matter particles based on lens-free imaging, a spectrum obtaining device configured to obtain a Raman spectrum of the charged particulate matter particles, and a processor configured to determine a size of the particulate matter particles and a concentration of the particulate matter particles based on the obtained image, and to determine components of the particulate matter particles based on the obtained Raman spectrum.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: September 7, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo Chang Lee, Yun S Park, Ho Jun Chang, Sung Hyun Nam
  • Publication number: 20210181019
    Abstract: A Raman sensor includes a light source assembly having a plurality of light sources configured to emit light to a plurality of skin points of skin, each of the plurality of skin points having a predetermined separation distance from a light collection region of the skin from which Raman scattered light is collected; a light collector configured to collect the Raman scattered light from the light collection region of the skin; and a detector configured to detect the collected Raman scattered light.
    Type: Application
    Filed: June 29, 2020
    Publication date: June 17, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Jun CHANG, Sung Hyun NAM, Alexey ANIKANOV, Yun S PARK, Eui Seok SHIN, Woochang LEE
  • Publication number: 20210137445
    Abstract: An apparatus for estimating a skin barrier function or transepidermal water loss of an object may include a spectrum acquisition assembly configured to obtain a Raman spectrum of the object, and a processor configured to extract one or more Type-1 Raman band spectra related to lipids from the obtained Rama spectrum; extract one or more Type-2 Raman band spectra related to lipids and proteins from the obtained Raman spectrum; extract respective features of each of the extracted one or more Type-1 Raman band spectra and the extracted one or more Type-2 Raman band spectra; and estimate the skin barrier function or the transepidermal rater loss of the object based on the extracted features.
    Type: Application
    Filed: April 16, 2020
    Publication date: May 13, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun S PARK, Woochang LEE, Ho Jun CHANG, Eui Seok SHIN
  • Patent number: 10983001
    Abstract: A Raman probe includes: a light source configured to emit light onto an object; a light collector configured to collect Raman-scattered light from the object by reflecting the Raman-scattered light, the light collector including a light incident port, a light emitting port, and a reflective surface including a light incident port portion and a light emitting port portion, a slope of the light incident port portion with respect to an optical axis of the light collector being smaller than a slope of the light emitting port portion with respect to the optical axis; a condenser lens configured to collect the Raman-scattered light collected by the light collector; and a photodetector configured to detect the Raman-scattered light collected by the condenser lens.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: April 20, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Ho Jun Chang
  • Publication number: 20210041365
    Abstract: Provided is an apparatus for measuring particulate matter including an image obtaining device configured to charge particulate matter particles included in air that is introduced to the image obtaining device, and to obtain an image of the charged particulate matter particles based on lens-free imaging, a spectrum obtaining device configured to obtain a Raman spectrum of the charged particulate matter particles, and a processor configured to determine a size of the particulate matter particles and a concentration of the particulate matter particles based on the obtained image, and to determine components of the particulate matter particles based on the obtained Raman spectrum.
    Type: Application
    Filed: March 16, 2020
    Publication date: February 11, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: WOO CHANG LEE, YUN S PARK, HO JUN CHANG, SUNG HYUN NAM
  • Publication number: 20210025802
    Abstract: Provided is an apparatus for measuring particulate matter, the apparatus including an air inflow device configured to receive air including particulate matter particles, two or more light sources configured to respectively emit light of different wavelengths to the air received, a pattern measuring device configured to measure scattering patterns for each wavelength of light based on detecting light that is forward-scattered by the particulate matter particles and light that is back-scattered by the particulate matter particles, and a processor configured to obtain a size of the particulate matter particles and a concentration of the particulate matter particles based on the scattering patterns for each wavelength of light.
    Type: Application
    Filed: March 16, 2020
    Publication date: January 28, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Jun Chang, Yun S Park, Woo Chang Lee
  • Publication number: 20200397353
    Abstract: An apparatus for measuring a Raman spectrum may include a processor configured to adjust a Raman probe parameter, set a Raman probe with the Raman probe parameter, obtain a first Raman spectrum of the sample at a first time point and a second Raman spectrum of the sample at a second time point, obtain a difference spectrum between the first Raman spectrum and the second Raman spectrum, determine a degree of similarity between the difference spectrum and an analyte Raman spectrum, determine an optimal Raman probe parameter based on the degree of similarity, and obtain a Raman spectrum of the sample for measuring bio-information by setting the Raman probe with the optimal Raman probe parameter.
    Type: Application
    Filed: March 12, 2020
    Publication date: December 24, 2020
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun S PARK, Woo Chang LEE, Ho Jun CHANG
  • Patent number: 10684226
    Abstract: A Raman probe provided includes a light source part configured to emit light on a sample, and further configured to adjust at least one of an incident angle of the light, a position of an emission point of the light, and a focal point of the light source part, a light collector configured to collect Raman scattered light from the sample, and further configured to adjust a field of view of Raman measurement and a focal point of the light collector, and a photodetector configured to receive the collected Raman scattered light, wherein the light source part comprises a reflection mirror configured to rotate to adjust the position of the emission point of the light.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: June 16, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Jun Chang, Woo Chang Lee