Patents by Inventor Don-Bok Choi

Don-Bok Choi 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).

  • Blue light emitting diode with electrode structure for distributing a current density
    Patent number: 6603152
    Abstract: Disclosed is a blue light emitting diode comprising a laminate structure formed in the center of a first conductive nitride semiconductor layer, a first electrode formed on a part of a transparent metal layer included in the laminate structure and a second electrode formed on a peripheral part of the first conductive nitride semiconductor layer, which is not covered by the laminate structure. By altering the locations of the first electrode and the second electrode and forming electrode extensions thereof, it is possible to disperse effectively the current density. Accordingly, the concentration of the current density contributing to the rapid increase of the temperature can be avoided without a significant change of the laminate structure of the conventional light emitting diode. In addition it is possible to improve resistance to electrostatic discharge and to reduce the driving voltage.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: August 5, 2003
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kyung-Sub Song, Young-Ho Park, Don-Bok Choi
  • Blue light emitting diode with electrode structure for distributing a current density
    Publication number: 20020047128
    Abstract: Disclosed is a blue light emitting diode comprising a laminate structure formed in the center of a first conductive nitride semiconductor layer, a first electrode formed on a part of a transparent metal layer included in the laminate structure and a second electrode formed on a peripheral part of the first conductive nitride semiconductor layer, which is not covered by the laminate structure. By altering the locations of the first electrode and the second electrode and forming electrode extensions thereof, it is possible to disperse effectively the current density. Accordingly, the concentration of the current density contributing to the rapid increase of the temperature can be avoided without a significant change of the laminate structure of the conventional light emitting diode. In addition it is possible to improve resistance to electrostatic discharge and to reduce the driving voltage.
    Type: Application
    Filed: July 9, 2001
    Publication date: April 25, 2002
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kyung-Sub Song, Young-Ho Park, Don-Bok Choi