Patents by Inventor Hwan Seok Choe

Hwan Seok Choe 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: 6943490
    Abstract: A deflection yoke mounted on a rear portion of a cathode ray tube (CRT) to deflect an electron beam emitted from an electron gun of the CRT includes a coil separator mounted on the CRT, a horizontal deflection coil mounted on an inside of the coil separator, having a first section generating a horizontal deflection magnetic field deflecting the electron in a horizontal direction and having a first radius, having a second section generating a magnetic field to weaken the horizontal deflection magnetic field and having a second radius different from the first radius, a vertical deflection coil mounted on an outside of the coil separator and generating a vertical deflection magnetic field deflecting the electron beam in a vertical direction, and a ferrite core covering a portion of the vertical deflection coil to strengthen the horizontal deflection magnetic field and the vertical deflection magnetic field.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: September 13, 2005
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chang Ju Lim, Jae Jung Kim, Hwan Seok Choe
  • Patent number: 6888325
    Abstract: Disclosed is a method for correcting inner pin distortion generated in the CRT product and deflection yoke thereof. According to the disclosed method and deflection yoke thereof, the additional circuit for suppressing inner pin distortion phenomenon on the screen is not required as the related art, reduction in manufacturing costs is possibly achieved. Also, as the circuit for suppressing pincushion is not used, power dissipation could be reduced, and instability in dispersion and characteristics of a pin in the middle portion due to increase of dispersion generation by a wiring of a coil could be resolved.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: May 3, 2005
    Assignee: Samsung Electro-Mechanics Co., Ltd
    Inventors: Yun Ki Hong, Hwan Seok Choe, Gong Hee Park
  • Publication number: 20040017165
    Abstract: Disclosed is a method for correcting inner pin distortion generated in the CRT product and deflection yoke thereof. According to the disclosed method and deflection yoke thereof, the additional circuit for suppressing inner pin distortion phenomenon on the screen is not required as the related art, reduction in manufacturing costs is possibly achieved. Also, as the circuit for suppressing pincushion is not used, power dissipation could be reduced, and instability in dispersion and characteristics of a pin in the middle portion due to increase of dispersion generation by a wiring of a coil could be resolved.
    Type: Application
    Filed: June 23, 2003
    Publication date: January 29, 2004
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Yun Ki Hong, Hwan Seok Choe, Gong Hee Park
  • Publication number: 20040012323
    Abstract: A deflection yoke includes a coil separator having a screen portion, a neck portion, and a connection portion, and having at least one protrusion formed on at least one of the screen portion and the neck portion, a horizontal deflection coil disposed on an inside of the coil separator to generate a horizontal magnetic field, a vertical deflection disposed on an outside of the coil separator to generate a vertical magnetic field, and having a pin hole formed on a position corresponding to the at least one protrusion coupling the vertical deflection coil to the coil separator.
    Type: Application
    Filed: July 1, 2003
    Publication date: January 22, 2004
    Inventors: Hwan-Seok Choe, Sung-Woon Kim
  • Publication number: 20040007958
    Abstract: A deflection yoke mounted on a rear portion of a cathode ray tube (CRT) to deflect an electron beam emitted from an electron gun of the CRT includes a coil separator mounted on the CRT, a horizontal deflection coil mounted on an inside of the coil separator, having a first section generating a horizontal deflection magnetic field deflecting the electron in a horizontal direction and having a first radius, having a second section generating a magnetic field to weaken the horizontal deflection magnetic field and having a second radius different from the first radius, a vertical deflection coil mounted on an outside of the coil separator and generating a vertical deflection magnetic field deflecting the electron beam in a vertical direction, and a ferrite core covering a portion of the vertical deflection coil to strengthen the horizontal deflection magnetic field and the vertical deflection magnetic field.
    Type: Application
    Filed: December 13, 2002
    Publication date: January 15, 2004
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Chang Ju Lim, Jae Jung Kim, Hwan Seok Choe
  • Patent number: 6501238
    Abstract: The present invention relates to a deflection yoke, and in particular, to an apparatus for correcting a mis-convergence and geometric distortion in a deflection yoke using a variable resistance, proving a more convenient way to adjust VCR by adjusting the current flowing in a comma-free coil using a variable resistance, instead of attaching a magnetic member as in the conventional method for the products associated with VCR (Vertial Green) properties.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: December 31, 2002
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Sung Yong Lim, Hwan Seok Choe, Jin Young Park
  • Patent number: 6215257
    Abstract: An apparatus for correcting a misconvergence and geometric distortion of a deflection yoke, comprising a generally conical coil separator having a neck part and screen part, a left vertical deflection coil and right vertical deflection coil disposed respectively on the left and right portions of the outer surface of the screen part, first to sixth coma precoils disposed respectively on the left upper portion, right upper portion, left lower portion, right lower portion, left middle portion and right middle portion of the neck part via E-shaped iron pieces in such a manner that they can generate 6-pole magnetic fields, the coma precoils being electrically connected to the left and right vertical deflection coils, a distortion adjustment unit for controlling the relative amounts of current flowing respectively through the left and right vertical deflection coils to adjust a geometric distortion on a screen, a first misconvergence adjustment unit for controlling the relative amounts of current flowing respective
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: April 10, 2001
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Hwan Seok Choe