Patents by Inventor Chun Choi

Chun 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).

  • Publication number: 20080158098
    Abstract: A method of driving a plasma display panel is disclosed. The method including a scan electrode, a sustain electrode, and a barrier rib includes applying a scan pulse of a positive polarity to the scan electrode for an address period, and applying a data pulse of a negative polarity corresponding to the scan pulse of the positive polarity to the address electrode for the address period. A gap between the scan electrode and the sustain electrode positioned within a discharge cell partitioned by the barrier rib is more than a height of the barrier rib.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Dongki Paik, Jongrae Lim, Tae Heon Kim, Wootae Kim, Sung Chun Choi
  • Publication number: 20080150836
    Abstract: A plasma display apparatus comprises a scan electrode and a sustain electrode; a data electrode for intersecting the scan electrode and the sustain electrode; and a pulse controller for controlling to apply a pulse having an opposite phase to the scan electrode and the sustain electrode during a reset period and apply a negative sustain pulse to the scan electrode and the sustain electrode during a sustain period, wherein a distance between the scan electrode and the sustain electrode is longer than that between the sustain electrode and the data electrode. Therefore, a surface discharge mode can be used even when applying negative pulses to the sustain electrode in a reset period, and a size and cost of a plasma display apparatus can be reduced by applying a negative pulse of the same magnitude as a sustain voltage without a separate negative voltage source.
    Type: Application
    Filed: December 26, 2006
    Publication date: June 26, 2008
    Inventors: Dongki Paik, Jongrae Lim, Tae Heon Kim, Wootae Kim, Sung Chun Choi
  • Publication number: 20080150835
    Abstract: Disclosed are a plasma display apparatus and a driving method thereof. The plasma display apparatus includes a plasma display panel comprising a plurality of scan electrodes and sustain electrodes, a driver driving the plurality of scan electrodes and sustain electrodes, and a negative sustain pulse controller controlling the driver and adjusting each of an energy supply time and an energy recovery time of a negative sustain pulse supplied to one or more of the scan electrodes or sustain electrodes during a sustain period.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 26, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Dongki PAIK, Jongrae Lim, Tae Heon Kim, Wootae Kim, Sung Chun Choi
  • Publication number: 20080111770
    Abstract: A method for driving a plasma display panel is disclosed. The panel comprises a scan electrode and a sustain electrode, which are formed on an upper substrate in parallel to each other, and an address electrode formed on a lower substrate in the direction where the address electrode intersects the scan electrode and the sustain electrode. The method comprises generating an opposite discharge between one of the scan electrode and the sustain electrode and the address electrode during a sustain period, and generating a surface discharge between the scan electrode and the sustain electrode after the opposite discharge is generated.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 15, 2008
    Inventors: Sung Chun CHOI, Jungwon Kang, Jun Weon Song
  • Publication number: 20080028571
    Abstract: The present invention discloses a vacuum cleaner including a vacuum cleaner main body having a suction pump, a suction nozzle portion for sucking impurities by a suction force supplied by the suction pump, a suction passage for connecting the suction nozzle portion to the suction pump, an agitator installed at the suction passage, and a driving unit for making the agitator perform linear translation. As the agitator is formed narrow and long, the bottom surface of the suction nozzle portion can maintain a small suction area. Therefore, the vacuum cleaner attains a high surface pressure which is an advantage of an ordinary type suction nozzle portion, and a high drag coefficient of impurities which is an advantage of a brush type suction nozzle portion.
    Type: Application
    Filed: July 17, 2007
    Publication date: February 7, 2008
    Inventors: Chung-ook Chong, Keyong-seon Jeong, Kie-tak Hyun, Seong-koo Cho, Geun-bae Hwang, Kyu-chun Choi, Jin-hyouk Shin, Jong-kyu Jang
  • Patent number: 7319292
    Abstract: A plasma display panel is disclosed. More particularly, the present invention relates to a plasma display panel, which can improve discharge stability as well as brightness and efficiency. The plasma display panel according to the present invention includes transparent electrodes (ITO electrodes) spaced in parallel to each other at a predetermined distance; and metal electrodes each formed on the transparent electrodes (ITO electrodes) in parallel to the transparent electrodes (ITO electrodes) so that the respective transparent electrodes (ITO electrodes) are inclined toward the side where the transparent electrodes face.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: January 15, 2008
    Assignee: LG Electronics Inc.
    Inventors: Sung Chun Choi, Jungwon Kang, Jun Weon Song
  • Patent number: 7310075
    Abstract: A PDP and a driving method thereof are disclosed in which luminous efficiency can be improved. The PDP includes: a pair of sustain electrodes formed at a peripheral portion of an upper substrate; and a trigger electrode formed at the center of the upper substrate.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: December 18, 2007
    Assignee: LG Electronics Inc.
    Inventors: Sung Ju Yoon, Sung Chun Choi, Insook Lee
  • Patent number: 7310073
    Abstract: The present invention relates to a plasma display panel, and more particularly, to an electrode structure of a plasma display panel capable of improving brightness and efficiency. According to a first embodiment of the present invention, in a plasma display panel of a long column structure having a front substrate and a rear substrate that are opposite to each other, the transparent electrodes of the scan electrodes or the sustain electrodes include projections projected toward the center of the discharge cells every discharge cell. Also, a discharge start voltage and a discharge sustain voltage can be lowered and brightness and efficiency can be increased. It is also possible to maintain color temperature equilibrium every RGB cell and to reduce an erroneous discharge of each cell.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: December 18, 2007
    Assignee: LG Electronics Inc.
    Inventors: Jae Bum Park, Sung Chun Choi
  • Publication number: 20070286766
    Abstract: Disclosed is an apparatus for cleaning an exhaust line of reaction chambers. The apparatus comprises plasma chambers into which a fluorine or chlorine gas is induced from a gas supply unit as a source of fluorine or chlorine radicals for removing solid deposits in the exhaust line, and a plasma source supply mechanism to convert the fluorine or chlorine gas into the fluorine or chlorine radicals through application of power to the fluorine or chlorine gas. The plasma source supply mechanism comprises an RF generator, antennas surrounding the plasma chamber to convert the fluorine or chlorine gas into the fluorine or chlorine radicals after receiving RF power, a relay switch for selection of RF supply to connect the RF generator with the plasma chambers, and a controller to control the RF power. The radicals are supplied to the exhaust line, and serve to remove the solid deposits.
    Type: Application
    Filed: November 8, 2006
    Publication date: December 13, 2007
    Applicant: TERATECH CO., LTD.
    Inventor: Byoung-Chun Choi
  • Publication number: 20070070592
    Abstract: A portable computer includes a main body, a keyboard assembly and an interface unit. The main body has a main circuit substrate received in the main body and a main body connector. The interface unit has a plurality of signal pads and a plurality of groups of branch pads split from an end of a line extended from each signal pad into a plurality of branches, The keyboard assembly has a plurality of keyboard signal pins connected to one of either each of the branch pads of each group or the signal pad, and a main body cable unit of which one side is provided with a cable connector connected to the main body connector, and the other side is provided with main body signal pins connected to the other of either each of the branch pads of each group or the signal pad.
    Type: Application
    Filed: July 13, 2006
    Publication date: March 29, 2007
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Jae-chun Choi
  • Publication number: 20050128724
    Abstract: A method and a device for coupling a PCB sheet are disclosed. If a defective PCB is found after the manufacture of continuously arranged circuit patterns, then the defective PCB sheet portion is removed to replace it with a new PCB sheet portion. That is, a defective circuit pattern sheet 2? is removed from continuously arranged circuit patterns of a first PCB sheet 4a. After removal of the defective circuit pattern sheet 2?, the first PCB sheet 4a is position-located by means of a position locating means 12. Then the space which is formed by removing the defective circuit pattern sheet 2? is filled with a second PCB sheet 4b on which a good quality circuit pattern 2b is printed. Then the first PCB sheet 4a and the second PCB sheet 4b are coupled together by using an adhesive means 14.
    Type: Application
    Filed: January 21, 2005
    Publication date: June 16, 2005
    Inventors: Bong Choi, Chun Choi
  • Publication number: 20050128725
    Abstract: A method and a device for coupling a PCB sheet are disclosed. If a defective PCB is found after the manufacture of continuously arranged circuit patterns, then the defective PCB sheet portion is removed to replace it with a new PCB sheet portion. That is, a defective circuit pattern sheet 2? is removed from continuously arranged circuit patterns of a first PCB sheet 4a. After removal of the defective circuit pattern sheet 2?, the first PCB sheet 4a is position-located by means of a position locating means 12. Then the space which is formed by removing the defective circuit pattern sheet 2? is filled with a second PCB sheet 4b on which a good quality circuit pattern 2b is printed. Then the first PCB sheet 4a and the second PCB sheet 4b are coupled together by using an adhesive means 14.
    Type: Application
    Filed: January 21, 2005
    Publication date: June 16, 2005
    Inventors: Bong Choi, Chun Choi
  • Publication number: 20050120549
    Abstract: A method and a device for coupling a PCB sheet are disclosed. If a defective PCB is found after the manufacture of continuously arranged circuit patterns, then the defective PCB sheet portion is removed to replace it with a new PCB sheet portion. That is, a defective circuit pattern sheet 2? is removed from continuously arranged circuit patterns of a first PCB sheet 4a. After removal of the defective circuit pattern sheet 2?, the first PCB sheet 4a is position-located by means of a position locating means 12. Then the space which is formed by removing the defective circuit pattern sheet 2? is filled with a second PCB sheet 4b on which a good quality circuit pattern 2b is printed. Then the first PCB sheet 4a and the second PCB sheet 4b are coupled together by using an adhesive means 14.
    Type: Application
    Filed: January 21, 2005
    Publication date: June 9, 2005
    Inventors: Bong Choi, Chun Choi
  • Publication number: 20050026499
    Abstract: The present invention relates to a connector and a notebook computer system having the same, wherein the connector comprises a connector body provided in the first electronic device and having at least one terminal; a shield combined with the connector body and grounded to a grounding part of the first electronic device; and at least one grounding member provided on the shield so as to grounding-connect a grounding part of the second electronic device with the shield. With this configuration, the present invention provides a connector and a notebook computer system using the same, which is improved in suppressing RF noise between the pair of electronic devices connected by the connector, assembling the notebook computer system efficiently, and decreasing production cost thereof.
    Type: Application
    Filed: June 22, 2004
    Publication date: February 3, 2005
    Inventor: Jae-chun Choi
  • Publication number: 20040233128
    Abstract: A plasma display panel is disclosed. More particularly, the present invention relates to a plasma display panel, which can improve discharge stability as well as brightness and efficiency. The plasma display panel according to the present invention includes transparent electrodes (ITO electrodes) spaced in parallel to each other at a predetermined distance; and metal electrodes each formed on the transparent electrodes (ITO electrodes) in parallel to the transparent electrodes (ITO electrodes) so that the respective transparent electrodes (ITO electrodes) are inclined toward the side where the transparent electrodes face.
    Type: Application
    Filed: March 3, 2004
    Publication date: November 25, 2004
    Inventors: Sung Chun Choi, Jungwon Kang, Jun Weon Song
  • Patent number: 6791517
    Abstract: A PDP and a driving method thereof are disclosed in which luminous efficiency can be improved. The PDP includes a scan/sustain electrode formed at a peripheral portion of a discharge cell, a common sustain electrode formed to oppose the scan/sustain electrode at the peripheral portion of the discharge cell, a first trigger electrode formed to be adjacent to the scan/sustain electrode, and a second trigger electrode formed to be adjacent to the common sustain electrode.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: September 14, 2004
    Assignee: LG Electronics Inc.
    Inventor: Sung Chun Choi
  • Publication number: 20040101934
    Abstract: A yeast-derived bioactive peptide having activities as an anti-stress agent, an anti-fatigue agent, premenstrual syndrome(PMS) and menstrual pain relaxants, and a brain-neurotrophic factor, and a method for preparing the bioactive peptide are provided. The preparation method involves incubating a strain of yeast, which is a natural source reconigzed as safe, until a maximum growth phase. The generation and release of anti-stress substances beneficial to the human body from the yeast are induced by properly applying a physical or chemical stress, such as high-temperature heating, ultrasonic waves, vibration, pH variations, etc. Next the yeast is autolyzed and purified to obtain the bioactive peptide. The yeast-derived bioactive peptide is effective in relieving stress, nervousness, anxiety, tension, insomnia, fatigue, and imbalance in the autonomic nerve regulation.
    Type: Application
    Filed: August 27, 2003
    Publication date: May 27, 2004
    Inventors: Yun Seok Choe, Il Jun Kang, Hyung Joo Suh, Young Chun Choi, Hee Sun Yun, Kyung Mi Kim, Sang Wook Ahn
  • Publication number: 20020084953
    Abstract: A PDP and a driving method thereof are disclosed in which luminous efficiency can be improved. The PDP includes includes: a pair of sustain electrodes formed at a peripheral portion of an upper substrate; and a trigger electrode formed at the center of the upper substrate.
    Type: Application
    Filed: November 30, 2001
    Publication date: July 4, 2002
    Applicant: LG ELECTRONICS INC.
    Inventors: Sung Ju Yoon, Sung Chun Choi, Insook Lee
  • Publication number: 20020074944
    Abstract: A mixed discharge gas of a PDP is disclosed, which includes at least one inert gas. At this time, Xe is contained at a ratio of 3˜20% in the mixed discharge gas, and a pressure is kept between 300 torr and 700 torr, thereby enhancing efficiency and a life span of the PDP.
    Type: Application
    Filed: December 12, 2001
    Publication date: June 20, 2002
    Applicant: LG Electronics Inc.
    Inventors: Insook Lee, Seong Ju Yoon, Sung Chun Choi
  • Publication number: 20020053883
    Abstract: A PDP and a driving method thereof are disclosed in which luminous efficiency can be improved. The PDP includes a scan/sustain electrode formed at a peripheral portion of a discharge cell, a common sustain electrode formed to oppose the scan/sustain electrode at the peripheral portion of the discharge cell, a first trigger electrode formed to be adjacent to the scan/sustain electrode, and a second trigger electrode formed to be adjacent to the common sustain electrode.
    Type: Application
    Filed: November 6, 2001
    Publication date: May 9, 2002
    Applicant: LG Electronics Inc.
    Inventor: Sung Chun Choi