Patents by Inventor Min Goo Choi

Min Goo 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).

  • Patent number: 7627259
    Abstract: A method and apparatus for fuser cooling fan control is provided. An image forming apparatus so configured comprises a fixing unit, a cooling fan for cooling the fixing unit, a detecting sensor for measuring ambient temperature and humidity of the image forming apparatus, and a controller for recognizing ambient temperature and humidity change from the measurement provided by the detecting sensor. The controller controls operation of the cooling fan according to the temperature and humidity change detected. The controller delays operation of the cooling fan by an amount of time if the ambient temperature and/or humidity is below a reference temperature and humidity level.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: December 1, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Kyung-Shig Chung, Min-Goo Choi, Sung-Hoon Hong
  • Patent number: 7486899
    Abstract: A fusing unit and a fusing apparatus using the fusing unit are provided. The fusing unit includes a pipe-shaped fusing roller having a heat generating unit and electrode members at both ends thereof. A power supply unit contacts the electrode members and supplies current thereto. A blocking member is disposed between the electrode members and the power supply units to block current by separating the power supply unit from the electrode members when a temperature of the heat generating unit rapidly increases.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: February 3, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min-goo Choi, Kyung-shig Chung, Sung-hoon Hong
  • Patent number: 7328735
    Abstract: An apparatus for forming phosphor layers on a display panel includes a base plate on which a display panel is placed. The base plate is inclined at an adjustable angle. The display panel, having a panel plate and barrier ribs formed on the panel plate is placed on the base plate. A spray unit includes a nozzle assembly for spraying a slurry containing phosphors into spaces between the barrier ribs. A charged unit for exerting electrostatic force on the phosphors is positioned adjacent to the display panel. The apparatus enables rapid formation of uniform phosphor layers on a display panel with the phosphor particles located adjacent to the surfaces of the phosphor layers.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: February 12, 2008
    Assignee: LG Electronics Inc.
    Inventors: Hyeon Seok O, Min Goo Choi
  • Publication number: 20070154230
    Abstract: A method and apparatus are provided for controlling a fixing temperature of an image forming device. The method includes measuring a temperature of a heat roller and a temperature of a pressure roller, which are included in a fixing unit, calculating a temperature difference between the temperature of the heat roller and the temperature of the pressure roller and if the calculated temperature difference is less than or equal to a predetermined value, beginning a printing job, and if the calculated temperature difference exceeds the predetermined value, the heat roller is continuously heated. Accordingly, when a print command is received after the image forming device is turned on or while in the power saving mode, a temperature of a heat roller and a temperature of a pressure roller are measured, and if a temperature difference between the temperature of the heat roller and the temperature of the pressure roller is less than or equal to a predetermined value, a printing job starts.
    Type: Application
    Filed: December 8, 2006
    Publication date: July 5, 2007
    Inventor: Min-goo Choi
  • Publication number: 20070134009
    Abstract: A fusing unit of an image forming apparatus and method for preventing defective fusing of an image are provided, in which a heating roller includes a heat source and is rotatably installed on a frame, a pressing roller presses a sheet of paper toward the heating roller to fuse a toner image on the paper, a pressing unit elastically bias the pressing roller to the heating roller, and a pressure sensor measures a pressure of the pressing roller. Accordingly, defective fusing of a toner image onto the paper and overheating of the fusing unit can be prevented.
    Type: Application
    Filed: November 27, 2006
    Publication date: June 14, 2007
    Inventors: Min-Goo Choi, Kyung-shig Chung, Sung-hoon Hong
  • Publication number: 20070019974
    Abstract: A fusing unit and a fusing apparatus using the fusing unit are provided. The fusing unit includes a pipe-shaped fusing roller having a heat generating unit and electrode members at both ends thereof. A power supply unit contacts the electrode members and supplies current thereto. A blocking member is disposed between the electrode members and the power supply units to block current by separating the power supply unit from the electrode members when a temperature of the heat generating unit rapidly increases.
    Type: Application
    Filed: May 16, 2006
    Publication date: January 25, 2007
    Inventors: Min-goo Choi, Kyung-shig Chung, Sung-hoon Hong
  • Publication number: 20060291894
    Abstract: A method and apparatus for fuser cooling fan control is provided. An image forming apparatus so configured comprises a fixing unit, a cooling fan for cooling the fixing unit, a detecting sensor for measuring ambient temperature and humidity of the image forming apparatus, and a controller for recognizing ambient temperature and humidity change from the measurement provided by the detecting sensor. The controller controls operation of the cooling fan according to the temperature and humidity change detected. The controller delays operation of the cooling fan by an amount of time if the ambient temperature and/or humidity is below a reference temperature and humidity level.
    Type: Application
    Filed: April 12, 2006
    Publication date: December 28, 2006
    Inventors: Kyung-Shig Chung, Min-Goo Choi, Sung-Hoon Hong
  • Publication number: 20050076836
    Abstract: An apparatus for forming phosphor layers on a display panel includes a base plate on which a display panel is placed. The base plate is inclined at an adjustable angle. The display panel, having a panel plate and barrier ribs formed on the panel plate is placed on the base plate. A spray unit includes a nozzle assembly for spraying a slurry containing phosphors into spaces between the barrier ribs. A charged unit for exerting electrostatic force on the phosphors is positioned adjacent to the display panel. The apparatus enables rapid formation of uniform phosphor layers on a display panel with the phosphor particles located adjacent to the surfaces of the phosphor layers.
    Type: Application
    Filed: September 2, 2004
    Publication date: April 14, 2005
    Applicant: LG Electronics Inc.
    Inventors: Hyeon O, Min Goo Choi