Patents by Inventor Joon-koo Kim

Joon-koo Kim 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).

  • Publication number: 20050093778
    Abstract: A panel driving method includes performing an addressing operation in scan lines only when at least one or more subfield data to be turned on exist in the scan lines in at least one or more subfields.
    Type: Application
    Filed: October 13, 2004
    Publication date: May 5, 2005
    Inventors: Joon-Koo Kim, Nam-Sung Jung
  • Publication number: 20050093777
    Abstract: A panel driving apparatus includes a first subfield data generator which converts input data of an odd frame into subfield data, a second subfield data generator which converts input data of an even frame into subfield data, an adder which adds the subfield data of the odd frame and the subfield data of the even frame, a frame memory which is subject to writing and reading of an output of the adder in response to a second clock, and a buffer memory connected to an output terminal of the frame memory, the buffer memory being subject to writing in response to the second clock and subject to reading in response to a first clock.
    Type: Application
    Filed: October 7, 2004
    Publication date: May 5, 2005
    Inventors: Myoung-Kwan Kim, Joon-Koo Kim
  • Patent number: 6867754
    Abstract: In a method of resetting a plasma display panel inclu/ding a front substrate and a rear substrate separated from each other and facing each other, in which a first electrode line and second display electrode line are formed parallel to each other on the front substrate and address electrode lines are formed perpendicular to the first electrode line and the second display electrode lines, a voltage applied to the first display electrode lines is gradually increased up to a first voltage. Then, a voltage applied to the second display electrode lines is gradually increased up to a second voltage higher than the first voltage while the voltage applied to the first display electrode lines is gradually increased up to a third voltage lower than the first voltage. The voltage applied to the first display electrode lines is maintained at the first voltage while the voltage applied to the second display electrode lines is gradually decreased down to a fourth voltage lower than the third voltage.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: March 15, 2005
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Joon-koo Kim, Hak-ki Choi, Seong-charn Lee, Nam-sung Jung
  • Publication number: 20040222949
    Abstract: A PDP address data processor, a method thereof, and a recording medium for storing a program used to perform the method. The address data processor generates subfield data corresponding to RGB input video data, divides them into two sets of subfield data, and stores them in a frame memory using rising and falling edges of a reference clock signal of a frame memory. The address data processor reads and arranges the stored subfield data using the rising and falling edges to generate address data for representing gray on the PDP. The address data processor uses an RGB mixing algorithm for selecting two different video data from among the RGB input video data to select video data, and generates the subfield data corresponding to the selected video data.
    Type: Application
    Filed: May 6, 2004
    Publication date: November 11, 2004
    Inventors: Myoung-Kwan Kim, Jae-Seok Jeong, Joon-Koo Kim, Nam-Sung Jung, Tae-Kyoung Kang
  • Publication number: 20040075625
    Abstract: The present invention relates to an apparatus and method for driving a PDP (plasma display panel). An image signal processor of the apparatus performs gamma correction and error diffusion processes of input image signals. A quantization error compensator compensates quantization errors with respect to an automatic power control (APC) level of image data output from the image signal processor. An error diffuser sets part of the image data output from the quantization error compensator as display errors and diffuses the display errors to peripheral pixels. A memory control and address driver generates sub-field and address data corresponding to image data that have undergone error diffusion by the error diffuser, and applies the data to the PDP. An APC and sustain/scan pulse generator generates a sub-field arrangement structure according to the APC level, generates control signals based on the generated sub-field arrangement, and applies the control signals to the PDP.
    Type: Application
    Filed: July 3, 2003
    Publication date: April 22, 2004
    Inventor: Joon-Koo Kim
  • Publication number: 20020180669
    Abstract: In a method of resetting a plasma display panel inclu/ding a front substrate and a rear substrate separated from each other and facing each other, in which a first electrode line and second display electrode line are formed parallel to each other on the front substrate and address electrode lines are formed perpendicular to the first electrode line and the second display electrode lines, a voltage applied to the first display electrode lines is gradually increased up to a first voltage. Then, a voltage applied to the second display electrode lines is gradually increased up to a second voltage higher than the first voltage while the voltage applied to the first display electrode lines is gradually increased up to a third voltage lower than the first voltage. The voltage applied to the first display electrode lines is maintained at the first voltage while the voltage applied to the second display electrode lines is gradually decreased down to a fourth voltage lower than the third voltage.
    Type: Application
    Filed: May 31, 2002
    Publication date: December 5, 2002
    Inventors: Joon-Koo Kim, Hak-Ki Choi, Seong-Charn Lee, Nam-Sung Jung
  • Patent number: 5789876
    Abstract: The invention provides a novel laser-plasma-based source of relativistic electrons; and a method to use laser-driven plasma waves as the basis for the source of electrons. The technique involves a combination of laser beams, which are focused in a plasma. One beam creates a wakefield plasma wave. In one embodiment, the one beam creates a wakefield plasma wave and the other beam alters the trajectory of background electrons, such that they become trapped in the plasma wave and are then accelerated to relativistic velocities, preferably in a distance less than a millimeter. In another embodiment, the second beam removes electrons from atomic ions previously generated by the first beam thereby providing electrons which become trapped in the plasma wave and then accelerated to relativistic velocities.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: August 4, 1998
    Assignee: The Regents of the Univeristy of Michigan
    Inventors: Donald Umstadter, Joon-Koo Kim, Evan Dodd