Patents by Inventor Doo Hwa Jang

Doo Hwa Jang 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).

  • Safety ignition device for high altitude dual pulse motor including the same
    Patent number: 11952968
    Abstract: The present invention relates a safety ignition device for a high altitude dual pulse motor according to the present invention, and can prevent accidental ignition of an ignition device or a propulsion engine while efficiently using a space by installing the safety ignition device in front of a combustion pipe, increase the reliability of ignition, and maintain the air tightness of the inside of the propulsion engine and the ignition device even in a high altitude environment.
    Type: Grant
    Filed: July 18, 2023
    Date of Patent: April 9, 2024
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Seung Gyo Jang, Doo Hee Han, Young Hwa Kwon
  • Mura correction driver
    Patent number: 11114017
    Abstract: A Mura correction driver which corrects Mura detected in a detection image obtained by photographing a display panel. The Mura correction driver uses Mura correction data including a position value of a Mura block for a display panel and coefficient values for the Mura block, and corrects display data corresponding to the position value of the Mura block, by using a Mura correction equation to which the coefficient values of the Mura block are applied.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: September 7, 2021
    Assignee: Silicon Works Co., Ltd.
    Inventors: Ki Taek Kim, Jun Young Park, Doo Hwa Jang, Seung Wan Yu, Do Yeon Kim
  • Mura correction system
    Patent number: 10964241
    Abstract: A Mura correction system which detects and corrects Mura in a detection image obtained by photographing a display panel. The Mura correction system detects a Mura block by checking, based on a brightness value, detection images obtained by photographing test images displayed on a display panel, generates coefficient values of coefficients of a Mura correction equation, and generates Mura correction data including a position value of the Mura block and the coefficient values of the coefficients of the Mura correction equation.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: March 30, 2021
    Assignee: Silicon Works Co., Ltd.
    Inventors: Ki Taek Kim, Jun Young Park, Doo Hwa Jang, Seung Wan Yu, Do Yeon Kim
  • Mura correction system
    Patent number: 10839731
    Abstract: A Mura correction system which performs correction of a Mura pixel in a detection image obtained by photographing a display panel. The Mura correction system may detect an individual Mura pixel and realize correction on the detected one Mura pixel, and may realize block-based correction on Mura pixels of some region of a Mura block.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: November 17, 2020
    Assignee: Silicon Works Co., Ltd.
    Inventors: Ki Taek Kim, Jun Young Park, Doo Hwa Jang, Seung Wan Yu, Do Yeon Kim
  • MURA CORRECTION DRIVER
    Publication number: 20200211442
    Abstract: A Mura correction driver which corrects Mura detected in a detection image obtained by photographing a display panel. The Mura correction driver uses Mura correction data including a position value of a Mura block for a display panel and coefficient values for the Mura block, and corrects display data corresponding to the position value of the Mura block, by using a Mura correction equation to which the coefficient values of the Mura block are applied.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 2, 2020
    Applicant: Silicon Works Co., Ltd.
    Inventors: Ki Taek Kim, Jun Young Park, Doo Hwa Jang, Seung Wan Yu, Do Yeon Kim
  • MURA CORRECTION SYSTEM
    Publication number: 20200211502
    Abstract: A Mura correction system which performs correction of a Mura pixel in a detection image obtained by photographing a display panel. The Mura correction system may detect an individual Mura pixel and realize correction on the detected one Mura pixel, and may realize block-based correction on Mura pixels of some region of a Mura block.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 2, 2020
    Applicant: Silicon Works Co., Ltd.
    Inventors: Ki Taek Kim, Jun Young Park, Doo Hwa Jang, Seung Wan Yu, Do Yeon Kim
  • MURA CORRECTION SYSTEM
    Publication number: 20200211429
    Abstract: A Mura correction system which detects and corrects Mura in a detection image obtained by photographing a display panel. The Mura correction system detects a Mura block by checking, based on a brightness value, detection images obtained by photographing test images displayed on a display panel, generates coefficient values of coefficients of a Mura correction equation, and generates Mura correction data including a position value of the Mura block and the coefficient values of the coefficients of the Mura correction equation.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 2, 2020
    Applicant: Silicon Works Co., Ltd.
    Inventors: Ki Taek Kim, Jun Young Park, Doo Hwa Jang, Seung Wan Yu, Do Yeon Kim