Patents by Inventor Hong Yoep Na

Hong Yoep Na 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).

  • ELECTRON BUFFERING MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20170117485
    Abstract: The present invention relates to an electron buffering material and an organic electroluminescent device comprising the same in an electron buffer layer. It is possible to provide an organic electroluminescent device having excellent luminous efficiency and lifespan characteristics by using the electron buffering material according to the present invention.
    Type: Application
    Filed: March 17, 2015
    Publication date: April 27, 2017
    Applicant: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Sang-He Cho, Jeong-Hwan Jeon, Hong-Yoep Na, Ji-Song Jun, Jae-Hoon Shim, Kyung-Hoon Choi, Chi-Sik Kim, Young-Jun Cho
  • ELECTRON BUFFERING MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE
    Publication number: 20170005276
    Abstract: The present disclosure relates to an electron buffering material, and an organic electroluminescent device comprising a first electrode, a second electrode facing the first electrode, a light-emitting layer between the first electrode and the second electrode, and an electron transport zone and an electron buffering layer between the light-emitting layer and the second electrode. The organic electroluminescent device comprising the electron buffering material of the present disclosure has a low driving voltage, excellent luminous efficiency, and long lifespan.
    Type: Application
    Filed: March 17, 2015
    Publication date: January 5, 2017
    Applicants: Rohm and Haas Electronic Materials Korea Ltd., Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Chi-Sik Kim, Hyo-Jung Lee, Su-Hyun Lee, Ji-Song Jun, Jeong-Eun Yang, Jae-Hoon Shim, Kyung-Hoon Choi, Young-Jun Cho, Jeong-Hwan Jeon, Hong-Yoep Na, Sang-He Cho
  • Compounds for organic electronic material and organic electroluminescent device using the same
    Patent number: 9136484
    Abstract: The present invention relates to electroluminescent compounds of formula 1 where A and/or B represent fluorene, carbazole, dibenzo[b,d]thiophene or dibenzo[b,d]furan derivatives and L1, X1, Ar1, Ar2, R5, R6 and R7 are as defined herein, and organic electroluminescent devices comprising the same. The compounds according to the present invention have an advantage in manufacturing an organic electroluminescent device which has a high luminous efficiency and a long operational lifetime.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: September 15, 2015
    Assignee: Rohm and Haas Electronics Materials Korea Ltd.
    Inventors: Hee-Sook Kim, Seok-Keun Yoon, Kyung-Joo Lee, Hong-Yoep Na, Nam-Kyun Kim, Young-Jun Cho, Hyuck-Joo Kwon, Bong-Ok Kim
  • NOVEL COMPOUNDS FOR ORGANIC ELECTRONIC MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
    Publication number: 20140114069
    Abstract: The present invention relates to electroluminescent compounds of formula 1 where A and/or B represent fluorene, carbazole, dibenzo[b,d]thiophene or dibenzo[b,d]furan derivatives and L1, X1, Ar1, Ar2, R5, R6 and R7 are as defined herein, and organic electroluminescent devices comprising the same. The compounds according to the present invention have an advantage in manufacturing an organic electroluminescent device which has a high luminous efficiency and a long operational lifetime.
    Type: Application
    Filed: March 23, 2012
    Publication date: April 24, 2014
    Applicant: Ronm and Haas Electronic Materials Korea Ltd.
    Inventors: Hee-Sook Kim, Seok-Keun Yoon, Kyung-Joo Lee, Hong-Yoep Na, Nam-Kyun Kim, Young-Jun Cho, Hyuck-Joo Kwon, Bong-Ok Kim
  • NOVEL COMPOUNDS FOR ORGANIC ELECTRONIC MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
    Publication number: 20140100367
    Abstract: The present invention relates to a novel compound and an organic electroluminescent device containing the same. The compound according to the present invention can manufacture an organic electroluminescent device which has high luminous efficiency and a long operation lifetime.
    Type: Application
    Filed: May 30, 2012
    Publication date: April 10, 2014
    Applicant: Rohm and Haas Electronics Materials Korea Ltd.
    Inventors: Seok-Keun Yoon, Hong-Yoep NA
  • NOVEL COMPOUND FOR ORGANIC ELECTRONIC MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
    Publication number: 20140077179
    Abstract: Provided are a novel compound for an organic electronic material and an organic electroluminescent device using the same. The compound for an organic electronic material according to the present invention has high electron transport efficiency, thereby preventing crystallization at the time manufacturing of a device, and allows a layer to be easily formed, thereby improving current characteristics of the device, and thus an OLED device having a lowered driving voltage and improved power efficiency as well as superior luminous efficiency and lifespan characteristics as compared with the existing material can be manufactured.
    Type: Application
    Filed: November 16, 2011
    Publication date: March 20, 2014
    Applicant: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Hyo Nim Shin, Chi Sik Kim, Su Hyun Lee, Hong Yoep Na, Seok-Keun Yoon, Soo Jin Yang, Soo Yong Lee, Young Jun Cho, Kyoung-Jin Park, Kyung Joo Lee, Bong Ok Kim