Patents by Inventor Hwarim Im

Hwarim Im 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: 12183273
    Abstract: An emission driver includes stages. At least one of the stages has a carry control node outputting a carry signal and an emission control node outputting an emission signal that are separated. Further, a second low gate voltage may be used that may be lower that a first low gate voltage. Further, transistors between each of the carry and emission control nodes and a second low voltage line transferring the second low gate voltage may have a series two transistor structure. Further, a transistor outputting the second low gate voltage as the carry signal may be repeatedly turned on and off in response to an inverted low clock signal. Accordingly, operation reliability of the emission driver of the display device may be improved.
    Type: Grant
    Filed: June 6, 2023
    Date of Patent: December 31, 2024
    Assignees: SAMSUNG DISPLAY CO., LTD., RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
    Inventors: Haemin Kim, Yong-Sang Kim, Kyunghoon Chung, Eun Kyo Jung, Hwarim Im
  • Publication number: 20240355270
    Abstract: An emission driving circuit comprises a pull-up circuit configured to output a first power voltage as an emission signal in response to a voltage of a pull-up control node, a first pull-down control circuit configured to control a voltage of a pull-down control node in response to the voltage of the pull-up control node, and a pull-down circuit configured to output a second power voltage as the emission signal in response to the voltage of the pull-down control node, wherein the first pull-down control circuit comprises a first transistor and a second transistor which are electrically connected in series.
    Type: Application
    Filed: October 24, 2023
    Publication date: October 24, 2024
    Applicants: Samsung Display Co., LTD., Research & Business Foundation SUNGKYUNKWAN UNIVERSITY
    Inventors: Haemin Kim, Yong-Sang Kim, Kyunghoon Chung, Eun Kyo Jung, Hwarim Im
  • Publication number: 20240346997
    Abstract: An emission driver includes stages. At least one of the stages has a carry control node outputting a carry signal and an emission control node outputting an emission signal that are separated. Further, a second low gate voltage may be used that may be lower that a first low gate voltage. Further, transistors between each of the carry and emission control nodes and a second low voltage line transferring the second low gate voltage may have a series two transistor structure. Further, a transistor outputting the second low gate voltage as the carry signal may be repeatedly turned on and off in response to an inverted low clock signal. Accordingly, operation reliability of the emission driver of the display device may be improved.
    Type: Application
    Filed: June 6, 2023
    Publication date: October 17, 2024
    Applicants: Samsung Display Co., LTD., Research & Business Foundation SUNGKYUNKWAN UNIVERSITY
    Inventors: HAEMIN KIM, Yong-Sang Kim, KYUNGHOON CHUNG, Eun Kyo Jung, Hwarim Im