Patents by Inventor Yongsang RYU

Yongsang 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).

  • Patent number: 10656082
    Abstract: A system for adjusting transmittance, according to the present disclosure, includes a sensing device configured to amplify electromagnetic waves of a specific frequency and a squeegee configured to concentrate a target material inside a slot formed in the sensing device. A transmittance of the sensing device is adjusted according to concentration of the target material concentrated inside the slot by the squeegee.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: May 19, 2020
    Assignee: Korea Institute of Science and Technology
    Inventors: Minah Seo, Yongsang Ryu, Young Min Jhon, Jaehun Kim, Taikjin Lee, Chulki Kim
  • Patent number: 10630045
    Abstract: The present disclosure discloses a double trigger type single pulse laser apparatus configured to suppress additional pulses to increase single pulse energy and improve stability of output as compared to a conventional single trigger type single pulse laser apparatus. According to the present invention, there is provided a single pulse laser apparatus including a resonator which has a first mirror, a second mirror, a gain medium, an electro-optic modulator and an acousto-optic modulator configured to respectively perform Q-switching and mode-locking, the single pulse laser apparatus including a first photodiode configured to measure a laser beam oscillated by the resonator.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: April 21, 2020
    Assignee: Korea Institute of Science and Technology
    Inventors: Young Min Jhon, Hui Dong Yang, Byunghyuck Moon, Minah Seo, Chulki Kim, Taikjin Lee, Yongsang Ryu, Hyunseok Song, Jaehun Kim
  • Publication number: 20190383922
    Abstract: The present invention relates to integrated localization method and apparatus of high accuracy, and estimates a relative position of a moving node, based on motion sensing of the moving node, estimates an absolute position of the moving node, based on a change pattern of at least one signal strength received from at least one fixed node over a plurality of time points, calculates accuracy of the absolute position of the moving node that changes along a movement route of the moving node, and determines a current position of the moving node from at least one of the relative position and the absolute position estimated as such in accordance with the accuracy of the absolute position of the moving node. Accordingly, it is possible to accurately estimate a position of a moving node using a radio signal which not only accurately estimates the position of the moving node even in a change of wireless environment or various route changes but also has almost no change in signal strength over a wide region.
    Type: Application
    Filed: December 28, 2017
    Publication date: December 19, 2019
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Taikjin LEE, Chulki KIM, Yongsang RYU, Beomju SHIN
  • Publication number: 20190204215
    Abstract: A system for adjusting transmittance, according to the present disclosure, includes a sensing device configured to amplify electromagnetic waves of a specific frequency and a squeegee configured to concentrate a target material inside a slot formed in the sensing device. A transmittance of the sensing device is adjusted according to concentration of the target material concentrated inside the slot by the squeegee.
    Type: Application
    Filed: December 28, 2018
    Publication date: July 4, 2019
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Minah SEO, Yongsang RYU, Young Min JHON, Jaehun KIM, Taikjin LEE, Chulki KIM
  • Patent number: 10170884
    Abstract: Disclosed herein is a single pulse laser apparatus which includes a first mirror and a second mirror disposed at both ends of the single pulse laser apparatus and having reflectivities of a predetermined level or more; a gain medium rotated at a predetermined angle and configured to oscillate a laser beam in a manual mode-locking state; a linear polarizer configured to output a beam having a specific polarized component of the oscillated laser beam; an etalon configured to adjust a pulse width of the oscillated laser beam; and an electro-optic modulator configured to perform Q-switching and single pulse switching.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: January 1, 2019
    Assignee: Korea Institute of Science and Technology
    Inventors: Young Min Jhon, Byunghyuck Moon, Young In John, Minah Seo, Jaehun Kim, Yongsang Ryu, Taikjin Lee, Seok Lee
  • Publication number: 20180309260
    Abstract: Disclosed herein is a single pulse laser apparatus which includes a first mirror and a second mirror disposed at both ends of the single pulse laser apparatus and having reflectivities of a predetermined level or more; a gain medium rotated at a predetermined angle and configured to oscillate a laser beam in a manual mode-locking state; a linear polarizer configured to output a beam having a specific polarized component of the oscillated laser beam; an etalon configured to adjust a pulse width of the oscillated laser beam; and an electro-optic modulator configured to perform Q-switching and single pulse switching.
    Type: Application
    Filed: April 19, 2018
    Publication date: October 25, 2018
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Young Min JHON, Byunghyuck MOON, Young In JOHN, Minah SEO, Jaehun KIM, Yongsang RYU, Taikjin LEE, Seok LEE