Patents by Inventor Jae Kwang Shim

Jae Kwang Shim 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).

  • ORGANIC ELECTROLUMINESCENT DEVICE
    Publication number: 20240147845
    Abstract: The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure shows high luminous efficiency and good lifespan by comprising a specific combination of the plural kinds of host compounds and a specific hole transport compound.
    Type: Application
    Filed: December 6, 2023
    Publication date: May 2, 2024
    Inventors: Kyoung-Jin PARK, Tae-Jin LEE, Jae-Hoon SHIM, Yoo Jin DOH, Hee-Choon AHN, Young-Kwang KIM, Doo-Hyeon MOON, Jeong-Eun YANG, Su-Hyun LEE, Chi-Sik KIM, Ji-Song JUN
  • MULTI-COMPONENT HOST MATERIAL AND AN ORGANIC ELECTROLUMINESCENCE DEVICE COMPRISING THE SAME
    Publication number: 20240090328
    Abstract: The present invention relates to a multi-component host material and an organic electroluminescent device comprising the same. By comprising a specific combination of the multi-component host compounds, the organic electroluminescent device according to the present invention can provide high luminous efficiency and excellent lifespan characteristics.
    Type: Application
    Filed: October 26, 2023
    Publication date: March 14, 2024
    Inventors: Hee-Choon AHN, Young-Kwang KIM, Su-Hyun LEE, Ji-Song JUN, Seon-Woo LEE, Chi-Sik KIM, Kyoung-Jin PARK, Nam-Kyun KIM, Kyung-Hoon CHOI, Jae-Hoon SHIM, Young-Jun CHO, Kyung-Joo LEE
  • Organic electroluminescent device
    Patent number: 11917907
    Abstract: The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure shows high luminous efficiency and good lifespan by comprising a specific combination of the plural kinds of host compounds and a specific hole transport compound.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: February 27, 2024
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Kyoung-Jin Park, Tae-Jin Lee, Jae-Hoon Shim, Yoo Jin Doh, Hee-Choon Ahn, Young-Kwang Kim, Doo-Hyeon Moon, Jeong-Eun Yang, Su-Hyun Lee, Chi-Sik Kim, Ji-Song Jun
  • Read/write control circuit for semiconductor memory device
    Patent number: 5877988
    Abstract: A write error preventing circuit for a semiconductor memory device prevents an erroneous reading operation an input buffer compares an externally applied write enable signal to an effective level signal, which is preset therein. A write error preventive circuit outputs a disable signal to the input buffer during an interval of time when a ground voltage bounces in accordance with an internal output signal from a NAND gate of an output buffer. The circuit prevents the outputting of a write signal from the input buffer during a read operation in accordance with the internal output signal from the output buffer when the ground voltage bounces.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: March 2, 1999
    Assignee: LG Semicon Co., Ltd.
    Inventors: Jae Kwang Shim, Sang Ho Lee