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).

  • Patent number: 8079113
    Abstract: The present invention discloses a vacuum cleaner including a main body (1) of the vacuum cleaner, a wheel (2) rotatably mounted at the body, a driving unit for driving the wheel (2), a sensor (71) positioned at the main body, for sensing an inclined direction of the main body (1), and a control unit for controlling the driving unit according to the inclined direction of the main body (1) sensed by the sensor (71). In this configuration, the posture of the main body (1) of the vacuum cleaner can be controlled according to the inverted pendulum control theory. Therefore, the main body (1) of the vacuum cleaner can maintain the posture thereof not to fall down.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: December 20, 2011
    Assignee: LG Electronics Inc.
    Inventors: Chung-Ook Chong, Kyeong-Seon Jeong, Kie-Tak Hyun, Seong-Koo Cho, Geun-Bae Hwang, Kyu-Chun Choi, Jin-Hyouk Shin, Jong-Kyu Jang
  • Patent number: 7874179
    Abstract: A method for removal of gaseous inclusions from a viscous liquid in which a layer of filter particles is positioned in the viscous liquid and the viscous liquid is passed through the layer of filter particles, whereby the gaseous inclusions combine or coalesce within the layer of filter particles, forming larger gaseous inclusions which rise to the top of the viscous liquid and escape therefrom.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: January 25, 2011
    Assignee: Gas Technology Institute
    Inventors: David M. Rue, Chun Choi
  • Publication number: 20100287725
    Abstract: A nozzle for a vacuum cleaner is provided, the nozzle having a structure in which suction performance may be improved. The nozzle may include a nozzle body, and an agitator rotatably installed in the nozzle body. Air may follow a first flow path through the nozzle, and a second flow path which diverges from the second flow path at the agitator, so as to uniformly distribute air flow through the nozzle.
    Type: Application
    Filed: May 14, 2010
    Publication date: November 18, 2010
    Inventors: Kyeong Seon Jeong, Geun Bae Hwang, Kie Tak Hyun, Kyu Chun Choi, Chang Hwa Sun
  • Patent number: 7810211
    Abstract: A vacuum cleaner is provided that includes a vacuum cleaner main body having a suction pump, a suction nozzle portion that sucks impurities by a suction force supplied by the suction pump, a suction passage that connects the suction nozzle portion to the suction pump, an agitator installed at the suction passage, and a driving device that makes the agitator perform a linear translation. As the agitator is formed narrow and long, a bottom surface of the suction nozzle portion may 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: Grant
    Filed: July 17, 2007
    Date of Patent: October 12, 2010
    Assignee: LG Electronics Inc.
    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
  • Publication number: 20100132149
    Abstract: The present embodiments relate to a vacuum cleaner. The vacuum cleaner according to present embodiments includes a main body; a wheel for moving the main body; a driving unit for driving the wheel; a sensor for sensing movement of the main body; and a controller for controlling the driving unit according to data sensed by the sensor.
    Type: Application
    Filed: March 14, 2008
    Publication date: June 3, 2010
    Applicant: LG Electronics Inc.
    Inventors: Kyeong-Seon Jeong, Kyu-Chun Choi, Geun-Bae Hwang, Chang-Hwa Sun, Ju-Young Min, Chung-Ook Chong
  • Patent number: 7714808
    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: Grant
    Filed: December 26, 2006
    Date of Patent: May 11, 2010
    Assignee: LG Electronics Inc.
    Inventors: Dongki Paik, Jongrae Lim, Tae Heon Kim, Wootae Kim, Sung Chun Choi
  • Publication number: 20090249834
    Abstract: A method for removal of gaseous inclusions from a viscous liquid in which a layer of filter particles is positioned in the viscous liquid and the viscous liquid is passed through the layer of filter particles, whereby the gaseous inclusions combine or coalesce within the layer of filter particles, forming larger gaseous inclusions which rise to the top of the viscous liquid and escape therefrom.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Applicant: GAS TECHNOLOGY INSTITUTE
    Inventors: David M. Rue, Chun Choi
  • Publication number: 20090217478
    Abstract: The present invention discloses a vacuum cleaner including a main body (1) of the vacuum cleaner, a wheel (2) rotatably mounted at the body, a driving unit for driving the wheel (2), a sensor (71) positioned at the main body, for sensing an inclined direction of the main body (1), and a control unit for controlling the driving unit according to the inclined direction of the main body (1) sensed by the sensor (71). In this configuration, the posture of the main body (1) of the vacuum cleaner can be controlled according to the inverted pendulum control theory. Therefore, the main body (1) of the vacuum cleaner can maintain the posture thereof not to fall down.
    Type: Application
    Filed: August 14, 2007
    Publication date: September 3, 2009
    Applicant: LG ELECTRONICS. INC.
    Inventors: Chung-Ook Chong, Kyeong-Seon Jeong, Kie-Tak Iiyun, Seong-Koo Cho, Geun-Bae Hwang, Kyu-Chun Choi, Jin-Hyouk Shin, Jong-Kyu Jang
  • Publication number: 20090085204
    Abstract: Provided is a wafer-level package including a wafer-level semiconductor chip having a plurality of integrated circuits (ICs) and pads formed on the top surface thereof; a molding material of which the outer portion is supported by the top surface of the semiconductor chip such that a cavity is provided on the semiconductor chip; and a conducive member filled in a plurality of vias which are formed in arbitrary positions of the molding material so as to pass through the molding material, the conductive member being connected to the pads.
    Type: Application
    Filed: July 8, 2008
    Publication date: April 2, 2009
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seung Wook Park, Chun Choi, Ju Pyo Hong, Si Joong Yang, Dae Jun Kim
  • Patent number: 7495893
    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: Grant
    Filed: July 13, 2006
    Date of Patent: February 24, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jae-chun Choi
  • Patent number: 7473426
    Abstract: A yeast extract or yeast-derived bioactive peptide having an activity of selectively inhibiting reuptake of serotonin and norepinephrine, which can be effectively used in preventing or treating various diseases related to reuptake of serotonin and norepinephrine, especially depression, anxiety, stress, fatigue and obesity is provided. Also, a yeast extract or 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 is provided. The yeast extract or yeast-derived bioactive peptide is effective in relieving stress, nervousness, anxiety, tension, insomnia, fatigue, and imbalance in the autonomic nerve regulation.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: January 6, 2009
    Inventors: Yun Seok Choe, Il Jun Kang, Hyung Joo Suh, Young Chun Choi, Hee Sun Yun, Kyung Mi Kim, Sang Wook Ahn, Ki Won Kim, Won Jun Hwang, Jin Man Kim
  • Publication number: 20080265740
    Abstract: A plasma display panel is disclosed, which includes a first panel provided with an address electrode, a first dielectric, and a phosphor on a first substrate, and a second panel bonded to the first panel by interposing a barrier therebetween, including a transparent electrode, a bus electrode, a second dielectric provided with high dielectric particles, and a protective layer on a second substrate.
    Type: Application
    Filed: April 2, 2008
    Publication date: October 30, 2008
    Inventors: Young Han Lee, Ho Seong Choi, Sung Chun Choi
  • Publication number: 20080231163
    Abstract: A plasma display panel and a method for manufacturing the same are disclosed. The plasma display panel includes a first substrate comprising first electrodes, a second substrate arranged to face the first substrate, the second substrate comprising second electrodes, barrier ribs formed between the first and second substrates, to define discharge cells, and a phosphor layer formed in each of the discharge cells. The phosphor layer includes a phosphor and a dielectric having a secondary electron emission coefficient higher than the phosphor.
    Type: Application
    Filed: March 19, 2008
    Publication date: September 25, 2008
    Inventor: Sung Chun CHOI
  • Publication number: 20080158099
    Abstract: A plasma display panel comprises a front panel having a front glass, and a rear panel opposing the front panel. The rear panel includes a rear glass positioned to face the front glass, an address electrode formed on the rear glass, a lower dielectric layer covering the address electrode, a barrier rib, positioned on the lower dielectric layer, partitioning a discharge cell. At least one of a scan electrode and a sustain electrode is formed inside the barrier rib. A gap between the scan electrode and the sustain electrode is greater than a height of the barrier rib. The address electrode intersects with the scan electrode and the sustain electrode, and has a protrusion electrode in proximity to the scan electrode.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Inventors: Dongki Paik, Kwang Yeol Choi, Jongrae Lim, Wootae Kim, Sung Chun Choi
  • Publication number: 20080157668
    Abstract: Disclosed are a plasma display panel and a method of manufacturing the same. The plasma display panel includes a scan electrode and a sustain electrode formed on a glass substrate, each including a discharge ignition part for generating initial discharge and a discharge diffusion portion for diffusing discharge to the entirety using the initial discharge, and the plasma display panel includes a dielectric layer disposed on a upper side of the glass substrate to cover the scan electrode and sustain electrode.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Inventors: Dongki Paik, Kwang Yeol Choi, Jongrae Lim, Wootae Kim, Sung Chun Choi
  • Publication number: 20080157670
    Abstract: A plasma display panel and a method of manufacturing the plasma display panel are disclosed. The plasma display panel includes a scan electrode, a sustain electrode, and a barrier rib formed on a glass, and an upper dielectric layer having a differential thickness formed on the glass. The upper dielectric layer covers the scan electrode and the sustain electrode. As the upper dielectric layer is far away from a discharge region portion between the scan electrode and sustain electrode, the width of the upper dielectric layer gradually increases. A distance 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, Kwang Yeol Choi, Jongrae Lim, Wootae Kim, Sung Chun Choi
  • Publication number: 20080158214
    Abstract: A method of driving a plasma display panel is disclosed. According to a negative sustain driving method for a plasma display panel using a negative sustain voltage, the negative sustain voltage and the ground level voltage are alternately applied to each of scan electrode Y and sustain electrode Z in a sustain period, and the negative sustain voltage is first applied to the sustain electrode Z.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 3, 2008
    Inventors: Dongki Paik, Jongrae Lim, Tae Heon Kim, Wootae Kim, Sung Chun Choi
  • 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