Patents by Inventor Ji-Yun Ryu

Ji-Yun Ryu 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).

  • Publication number: 20230173614
    Abstract: Provided are ceramic cutting methods and equipment: a beam irradiation unit for irradiating a beam of a wavelength absorbed by a pattern formed on an upper surface of a ceramic and partially absorbed by the ceramic; a coolant spraying unit for spraying a coolant onto the ceramic irradiated with the beam, wherein the pattern is removed by heating and cooling the ceramic , and is cut by reducing thermal damage by using the stress caused by the recrystallization of an upper layer or all of the ceramic or the stress generated by the thermal expansion and contraction of the upper layer or the entire ceramic, thereby recrystallizing the ceramic by heating and cooling the ceramic , or cutting the ceramic by heating until the ceramic melts, and cooling to apply thermal stress to the inside of the ceramic, followed by an additional separation process of a ceramic material without loss.
    Type: Application
    Filed: April 21, 2021
    Publication date: June 8, 2023
    Inventors: Jung Joon LEE, Ji Yun RYU
  • Patent number: 10483799
    Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: November 19, 2019
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dong Ho Cho, Joung Ho Kim, Yang Bae Chun, Eun-Jung Kim, Ji-Yun Ryu, Mi-Joo Kim, Il-Song Han, Seung-Young Ahn, Gyeng-Chul Kim, Gu Ho Jeong
  • Patent number: 10476303
    Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: November 12, 2019
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dong Ho Cho, Joung Ho Kim, Yang Bae Chun, Eun-Jung Kim, Ji-Yun Ryu, Mi-Joo Kim, Ii-Song Han, Seung-Young Ahn, Gyeng-Chul Kim, Gu Ho Jeong
  • Publication number: 20190267839
    Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.
    Type: Application
    Filed: January 15, 2019
    Publication date: August 29, 2019
    Inventors: Dong Ho Cho, Joung Ho Kim, Yang Bae Chun, Eun-Jung Kim, Ji-Yun Ryu, Mi-Joo Kim, II-Song Han, Seung-Young Ahn, Gyeng-Chul Kim, Gu Ho Jeong
  • Publication number: 20190207421
    Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.
    Type: Application
    Filed: January 15, 2019
    Publication date: July 4, 2019
    Inventors: Dong Ho Cho, Joung Ho Kim, Yang Bae Chun, Eun-Jung Kim, Ji-Yun Ryu, Mi-Joo Kim, II-Song Han, Seung-Young Ahn, Gyeng-Chul Kim, Gu Ho Jeong
  • Patent number: 10230268
    Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: March 12, 2019
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dong Ho Cho, Joung Ho Kim, Yang Bae Chun, Eun-Jung Kim, Ji-Yun Ryu, Mi-Joo Kim, Il-Song Han, Seung-Young Ahn, Gyeng-Chul Kim, Gu Ho Jeong
  • Publication number: 20140319927
    Abstract: The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency.
    Type: Application
    Filed: September 25, 2012
    Publication date: October 30, 2014
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Dong Ho Cho, Joung Ho Kim, Yang Bae Chun, Eun-Jung Kim, Ji-Yun Ryu, Mi-Joo Kim, Il-Song Han, Seung-Young Ahn, Gyeng-Chul Kim, Gu Jeong