Patents by Inventor Seung-Mook Baek

Seung-Mook Baek 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: 10662511
    Abstract: A nitride semiconductor light-emitting device comprises a substrate; a first conductivity type semiconductor layer formed on the substrate; a high-resistance semiconductor layer formed on the first conductivity type semiconductor layer; an active layer formed on the high-resistance semiconductor layer and having multiple quantum wells; and a second conductivity type semiconductor layer formed on the active layer. A first v-pit structure is formed between the high-resistance semiconductor layer and the first conductivity type semiconductor layer, and a second v-pit structure is formed between the active layer and the second conductivity type semiconductor layer. The second v-pit structure is formed such that a lowest part of the second conductivity type semiconductor layer contacts a lowest quantum well of the multiple quantum wells of the active layer through the second v-pit structure.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: May 26, 2020
    Assignee: KOREA PHOTONICS TECHNOLOGY INSTITUTE
    Inventors: Seung-Jae Lee, Sung-Chul Choi, Jong-Hyeob Baek, Seong-Ran Jeon, Sang-Mook Kim, Tae Hoon Chung
  • Patent number: 10396559
    Abstract: The present invention relates to an apparatus for managing voltage stability of an electrical power grid and a method therefor.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: August 27, 2019
    Assignee: Korea Electric Power Corporation
    Inventors: Jeong-Hoon Shin, Su-Chul Nam, Ji-Young Song, Seung-Mook Baek
  • Patent number: 9871377
    Abstract: The device for cooperation control of the EMS and the DMS comprises: a calculation unit for calculating an AQI index on the basis of target system information and power flow calculation data; a determination unit which determines whether or not to perform reactive power cooperation control switching of the DMS on the basis of the calculated AQI index and the amount of needed local reserve reactive power (Qreq), and which determines a suppliable reactive power capacity on the basis of the amount of needed local reserve reactive power (Qreq) and a suppliable reactive power range; and a control unit which transmits a cooperation control mode switching control signal so as to switch the DMS to a reactive power cooperation control mode if it is determined that reactive power cooperation control switching of the DMS is to be performed, and which controls the DMS to supply reactive power.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: January 16, 2018
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Jeong-Hoon Shin, Jae-Gul Lee, Seung-Mook Baek, Sang-Wook Han, Ji-Young Song, Tae-Kyun Kim
  • Publication number: 20170302078
    Abstract: The present invention relates to an apparatus for managing voltage stability of an electrical power grid and a method therefor.
    Type: Application
    Filed: June 2, 2015
    Publication date: October 19, 2017
    Inventors: Jeong-Hoon SHIN, Su-Chul NAM, Ji-Young SONG, Seung-Mook BAEK
  • Publication number: 20150214739
    Abstract: The device for cooperation control of the EMS and the DMS comprises: a calculation unit for calculating an AQI index on the basis of target system information and power flow calculation data; a determination unit which determines whether or not to perform reactive power cooperation control switching of the DMS on the basis of the calculated AQI index and the amount of needed local reserve reactive power (Qreq), and which determines a suppliable reactive power capacity on the basis of the amount of needed local reserve reactive power (Qreq) and a suppliable reactive power range; and a control unit which transmits a cooperation control mode switching control signal so as to switch the DMS to a reactive power cooperation control mode if it is determined that reactive power cooperation control switching of the DMS is to be performed, and which controls the DMS to supply reactive power.
    Type: Application
    Filed: September 17, 2013
    Publication date: July 30, 2015
    Inventors: Jeong-Hoon Shin, Jae-Gul Lee, Seung-Mook Baek, Sang-Wook Han, Ji-Young Song, Tae-Kyun Kim