Patents by Inventor Ka Hyun Lee

Ka Hyun Lee 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).

  • Apparatus and method for estimating body temperature, and healthcare device
    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
  • Motor drive system comprising power network between inverter and motor
    Patent number: 11711041
    Abstract: Embodiments relate to a motor driving system comprising a power network between an inverter and a motor and a method for designing such motor drive system, the motor drive system comprising: an AC motor; an inverter unit for applying a voltage to the AC motor; a controller configured for controlling an output voltage of the inverter unit; and a power network circuit disposed between the inverter unit and the AC motor, wherein the power network circuit is configured with passive element.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: July 25, 2023
    Assignee: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Jung-Ik Ha, Yong Su Han, Ka Hyun Lee, Hyeon Gyu Choi
  • MOTOR DRIVE SYSTEM COMPRISING POWER NETWORK BETWEEN INVERTER AND MOTOR
    Publication number: 20210194403
    Abstract: Embodiments relate to a motor driving system comprising a power network between an inverter and a motor and a method for designing such motor drive system, the motor drive system comprising: an AC motor; an inverter unit for applying a voltage to the AC motor; a controller configured for controlling an output voltage of the inverter unit; and a power network circuit disposed between the inverter unit and the AC motor, wherein the power network circuit is configured with passive element.
    Type: Application
    Filed: February 11, 2019
    Publication date: June 24, 2021
    Inventors: Jung-Ik Ha, Yong Su Han, Ka Hyun Lee, Hyeon Gyu Choi