Patents by Inventor Doo Hoon Ahn

Doo Hoon Ahn 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
  • 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
  • Method for producing molding compound resin tablet for wavelength conversion, and method for manufacturing white light emitting diode by using the production method
    Patent number: 7560057
    Abstract: Disclosed herein is a method for producing a molding compound resin tablet for wavelength conversion. The method comprises the steps of wet-dispersing a phosphor powder in a translucent liquid resin to form a molding compound resin body in which the phosphor powder is dispersed, and grinding the molding compound resin body into a powder form and applying a predetermined pressure to the resin powder. Further disclosed is a method for manufacturing a white light emitting diode using the molding compound resin tablet by a transfer molding process.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: July 14, 2009
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joon Ho Yoon, Seon Goo Lee, Doo Hoon Ahn
  • METHOD FOR PRODUCING MOLDING COMPOUND RESIN TABLET FOR WAVELENGTH CONVERSION, AND METHOD FOR MANUFACTURING WHITE LIGHT EMITTING DIODE BY USING THE PRODUCTION METHOD
    Publication number: 20070120290
    Abstract: Disclosed herein is a method for producing a molding compound resin tablet for wavelength conversion. The method comprises the steps of wet-dispersing a phosphor powder in a translucent liquid resin to form a molding compound resin body in which the phosphor powder is dispersed, and grinding the molding compound resin body into a powder form and applying a predetermined pressure to the resin powder. Further disclosed is a method for manufacturing a white light emitting diode using the molding compound resin tablet by a transfer molding process.
    Type: Application
    Filed: December 29, 2006
    Publication date: May 31, 2007
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Joon Ho YOON, Seon Goo LEE, Doo Hoon AHN
  • Method for producing molding compound resin tablet for wavelength conversion, and method for manufacturing white light emitting diode by using the production method
    Patent number: 7157029
    Abstract: Disclosed herein is a method for producing a molding compound resin tablet for wavelength conversion. The method comprises the steps of wet-dispersing a phosphor powder in a translucent liquid resin to form a molding compound resin body in which the phosphor powder is dispersed, and grinding the molding compound resin body into a powder form and applying a predetermined pressure to the resin powder. Further disclosed is a method for manufacturing a white light emitting diode using the molding compound resin tablet by a transfer molding process.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: January 2, 2007
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joon Ho Yoon, Seon Goo Lee, Doo Hoon Ahn
  • Light-emitting diode
    Patent number: D495668
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: September 7, 2004
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chang Wook Kim, Doo Hoon Ahn