Patents by Inventor Geum-Jong Roh

Geum-Jong Roh 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: 8877557
    Abstract: An organic light emitting display device is manufactured by: preparing a target substrate that includes sub-pixel areas (each having a thin film transistor) and pixel defining areas (each having a conductive layer) between the sub-pixel areas; preparing an ionized deposition material by vaporizing and ionizing a deposition material; applying a ground voltage to one of the sub-pixel areas while applying a voltage having a same polarity as the ionized deposition material to the neighboring ones of the sub-pixel areas and to the pixel defining areas; and depositing the ionized deposition material on the one of the sub-pixel areas to form an organic thin layer while the one of the sub-pixel areas is polarized by an electric field generated by the voltage being applied to the conductive layer of the pixel defining areas.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: November 4, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Geum Jong Roh
  • Publication number: 20140011312
    Abstract: An organic light emitting display device is manufactured by: preparing a target substrate that includes sub-pixel areas (each having a thin film transistor) and pixel defining areas (each having a conductive layer) between the sub-pixel areas; preparing an ionized deposition material by vaporizing and ionizing a deposition material; applying a ground voltage to one of the sub-pixel areas while applying a voltage having a same polarity as the ionized deposition material to the neighboring ones of the sub-pixel areas and to the pixel defining areas; and depositing the ionized deposition material on the one of the sub-pixel areas to form an organic thin layer while the one of the sub-pixel areas is polarized by an electric field generated by the voltage being applied to the conductive layer of the pixel defining areas.
    Type: Application
    Filed: December 14, 2012
    Publication date: January 9, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventor: Geum Jong Roh
  • Publication number: 20120321813
    Abstract: A thin film deposition apparatus including a vacuum chamber; a substrate arranged inside the vacuum chamber; a container unit containing a deposition material and including a discharge opening to discharge the deposition material in a vaporized state; a first heating unit configured to heat at least a portion of the container unit; and a vapor discharge tube including a first opening connected to the discharge opening, and a second opening to discharge the vaporized deposition material to an outside of the vapor discharge tube, a length of a path connecting a center of the first opening to a center of the second opening along a centerline of the vapor discharge tube being greater than a length of a straight line interconnecting the centers of the first and second openings, the thin film deposition apparatus being configured to apply an electric field to the vapor discharge tube.
    Type: Application
    Filed: April 6, 2012
    Publication date: December 20, 2012
    Inventors: Geum-Jong Roh, Tae-Wook Kim