Patents by Inventor Hyung-Seok Chang

Hyung-Seok Chang 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).

  • QUANTUM DOTS, DISPLAY APPARATUS INCLUDING THE SAME, AND METHOD FOR MANUFACTURING THE DISPLAY APPARATUS
    Publication number: 20240114709
    Abstract: The quantum dot comprises a ligand which is a copolymer comprising a first repeating unit comprising at least one or more hole transporting functional groups and a second repeating unit comprising at least one or more photocrosslinking functional groups.
    Type: Application
    Filed: September 22, 2020
    Publication date: April 4, 2024
    Applicants: LG DISPLAY CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Joona BANG, Ki Seok CHANG, Jeong Min MOON, Soon Shin JUNG, Dong Hoon CHOI, Hyung Jong KIM, Jae Wan KO
  • Electrophotographic image forming apparatus and development cartridge
    Patent number: 9058017
    Abstract: An electrophotographic image forming apparatus and development cartridge are provided. The apparatus including a separating member mounted in a development cartridge. The separating member includes a development nip separating portion and a charging nip separating portion respectively separating a development nip and a charging nip when the development cartridge is mounted in a mounting portion of a photoreceptor cartridge mounted in a body.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: June 16, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-geun Lee, Sung-jin Kim, Yong-Il Moon, Ji-won Moon, Seung-chan Park, Hyung-seok Chang
  • Electrophotographic image forming apparatus and development cartridge
    Patent number: 9042773
    Abstract: An electrophotographic image forming apparatus and a development cartridge are provided. The electrophotographic image forming apparatus includes a body including an opening, a photoreceptor cartridge attached to, or detached from, the body through the opening, a photoconductive drum and a mounting portion, a development cartridge attached to, or detached from, the mounting portion through the opening while the photoreceptor cartridge is mounted in the body, a development roller supplying toner to an electrostatic latent image formed on the photoconductive drum, a cover for opening or closing the opening, and a pressurizing unit fixing the development cartridge to the mounting portion by providing a pressing force to the development cartridge in a direction parallel to a center line connecting centers of the photoconductive drum and development roller while the opening is closed.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung-seok Chang, Byeong-no Jeong, Seong-ho Jeong, Ji-won Moon, Jong-won Han
  • ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND DEVELOPMENT CARTRIDGE
    Publication number: 20140205316
    Abstract: An electrophotographic image forming apparatus and development cartridge are provided. The apparatus including a separating member mounted in a development cartridge. The separating member includes a development nip separating portion and a charging nip separating portion respectively separating a development nip and a charging nip when the development cartridge is mounted in a mounting portion of a photoreceptor cartridge mounted in a body.
    Type: Application
    Filed: September 17, 2013
    Publication date: July 24, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-geun LEE, Sung-jin Kim, YONG-IL MOON, Ji-won Moon, Seung-chan Park, Hyung-seok Chang
  • ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS AND DEVELOPMENT CARTRIDGE
    Publication number: 20140205314
    Abstract: An electrophotographic image forming apparatus and a development cartridge are provided. The electrophotographic image forming apparatus includes a body including an opening, a photoreceptor cartridge attached to, or detached from, the body through the opening, a photoconductive drum and a mounting portion, a development cartridge attached to, or detached from, the mounting portion through the opening while the photoreceptor cartridge is mounted in the body, a development roller supplying toner to an electrostatic latent image formed on the photoconductive drum, a cover for opening or closing the opening, and a pressurizing unit fixing the development cartridge to the mounting portion by providing a pressing force to the development cartridge in a direction parallel to a center line connecting centers of the photoconductive drum and development roller while the opening is closed.
    Type: Application
    Filed: May 31, 2013
    Publication date: July 24, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyung-seok CHANG, Byeong-no JEONG, Seong-ho JEONG, Ji-won MOON, Jong-won HAN
  • Toner cartridge for a printer
    Patent number: D692944
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: November 5, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Hwan Noh, Ji-Won Moon, Young-Chae Kim, Jin-Hong Kim, Jong-Hwa Park, Hyung-Seok Chang, Dong-Kyu Lee, Ki-Hyun Yoo, Yong-Nam Ahn
  • Toner cartridge for a printer
    Patent number: D692945
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: November 5, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Hwan Noh, Ji-Won Moon, Young-Chae Kim, Jin-Hong Kim, Jong-Hwa Park, Hyung-Seok Chang, Dong-Kyu Lee, Ki-Hyun Yoo, Yong-Nam Ahn