Patents by Inventor Seung Ryung RYU

Seung Ryung 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).

  • Power supply device and control circuit thereof
    Patent number: 9066395
    Abstract: There are provided a power supply device switching power input to a primary side to supply the power to a predetermined load connected to a secondary side electrically insulated from the primary side and a control circuit thereof. The control circuit generates a predetermined PWM signal to apply the PWM signal to a dimming switch connected to an end of the load and controls a switching frequency of the primary side, based on a control voltage generated according to a feedback signal according to the power supplied to the load and the PWM signal, and the control voltage maintains a constant difference between a minimum voltage level and a maximum voltage level regardless of a duty of the PWM signal.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: June 23, 2015
    Assignees: SAMSUNG ELECTRO-MECHANICS CO., LTD., UNIVERSITY OF SEOUL INDUSTRY COOPERATION FOUNDATION
    Inventors: Dae Hoon Han, Seo Hyung Kim, Seung Ryung Ryu, Joong Ho Choi, Joo Hyung Lee, Hong Jin Kim, Jae Shin Lee, Kang Yoon Lee
  • POWER SUPPLY DEVICE AND CONTROL CIRCUIT THEREOF
    Publication number: 20150002044
    Abstract: There are provided a power supply device switching power input to a primary side to supply the power to a predetermined load connected to a secondary side electrically insulated from the primary side and a control circuit thereof. The control circuit generates a predetermined PWM signal to apply the PWM signal to a dimming switch connected to an end of the load and controls a switching frequency of the primary side, based on a control voltage generated according to a feedback signal according to the power supplied to the load and the PWM signal, and the control voltage maintains a constant difference between a minimum voltage level and a maximum voltage level regardless of a duty of the PWM signal.
    Type: Application
    Filed: October 25, 2013
    Publication date: January 1, 2015
    Applicants: University of Seoul Industry Cooperation Foundation, SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Dae Hoon HAN, Seo Hyung KIM, Seung Ryung RYU, Joong Ho CHOI, Joo Hyung LEE, Hong Jin KIM, Jae Shin LEE, Kang Yoon LEE
  • POWER SUPPLY APPARATUS AND CONTROL CIRCUIT THEREOF
    Publication number: 20150002043
    Abstract: There are provided a power supply apparatus switching a power input to a primary side to supply the power to a predetermined load connected to a secondary side electrically insulated from the primary side and a control circuit thereof, the control circuit generating a predetermined PWM signal to apply the generated PWM signal to a dimming switch connected to an end of the load and controlling a switching frequency of the primary side based on a control voltage generated according to a feedback signal depending on the power supplied to the load and the PWM signal, wherein a voltage variation amount of the control voltage may be constantly maintained regardless of a duty of the PWM signal.
    Type: Application
    Filed: October 25, 2013
    Publication date: January 1, 2015
    Applicants: University of Seoul Industry Cooperation Foundation, SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Dae Hoon HAN, Seo Hyung KIM, Seung Ryung RYU, Joong Ho CHOI, Hong Jin KIM, Joo Hyung LEE, Jae Shin LEE, Kang Yoon LEE