Patents by Inventor Jeong Pil Choi

Jeong Pil 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: 7598930
    Abstract: Disclosed therein is an apparatus for driving a plasma display panel, with a simple structure.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: October 6, 2009
    Assignee: LG Electronics Inc.
    Inventors: Jeong Pil Choi, Seong Hee Park
  • Patent number: 7592973
    Abstract: The present invention relates to a plasma display panel, and more particularly, to an apparatus for driving a plasma display panel and method thereof. The method for driving the PDP according to the present invention includes the steps of: setting a sustain period where a specific voltage is maintained for a predetermined time period between first and second periods whose voltage varies, in the ramp waveform, and supplying the ramp waveform to electrodes. The apparatus for driving the PDP according to the present invention includes an initialization driving circuit for generating a ramp waveform including a sustain period where a specific voltage is maintained for a predetermined time period between first and second periods whose voltage varies and supplying the ramp waveform to electrodes.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: September 22, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Patent number: 7567224
    Abstract: The present invention relates to a driving device and a driving method of a plasma display panel that lowers power consumption and enables high-speed driving. The driving device of the plasma display panel includes a data-loading detection part that comprehends data-loading provided for each of sub-fields and generates a first control signal and a second control signal in response to the data-loading, a direct current voltage supply part that provides direct-current voltage in response to the first control signal from the data-loading detection part, an energy recovery circuit that provides data voltage in response to the second control signal from the data-loading detection part, and address driving part that generates data pulse with either direct-current voltage or data voltage provided by the energy recovery circuit and the direct current voltage supply part.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: July 28, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Patent number: 7567226
    Abstract: The present invention relates to a method and apparatus for driving a plasma display panel (PDP) for reducing an address period and stabilizing discharge. The method for driving the PDP includes a first step of, during the address period, supplying a scan voltage to the scan electrodes and a data voltage to the address electrodes to select a cell, and supplying a DC bias voltage to the sustain electrodes; a second step of, between the address period and the sustain period, lowering a voltage of the scan electrodes and maintaining a voltage on the sustain electrodes in the DC bias voltage; and a third step of during the sustain period, alternately applying a sustain pulse to the scan electrodes and the sustain electrodes to generate sustain discharge.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: July 28, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Patent number: 7564430
    Abstract: A plasma display apparatus and a driving method thereof are provided. In the inventive plasma display apparatus and the driving method, when an image is displayed by dividing one subfield into a reset period, an address period, and a sustain period, a second sustain pulse applied in the sustain period of the one subfield has a sustain voltage applying time point different from that of a first sustain pulse.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: July 21, 2009
    Assignee: LG Electronics Inc.
    Inventors: Jeong Pil Choi, Beong Ha Lim
  • Publication number: 20090167642
    Abstract: Provided are a method and apparatus for driving a PDP for widening a driving margin and improving contrast. The method for driving a PDP includes a first step of forming wall charges in cells with a set-up discharge using a set-up signal in a first sub-field and erasing the wall charges with a set-down discharge using a first set-down signal to initialize the cells, and a second step of erasing the wall charges with a set-down discharge generated using a second set-down signal different from the first set-down signal in a second sub-field, to initialize the cells. The method and apparatus for driving a PDP uniformly initialize sub-fields to widen the driving margin of PDP and remove a set-up discharge in at least one sub-field to improve the contrast of PDP.
    Type: Application
    Filed: February 27, 2009
    Publication date: July 2, 2009
    Inventors: Hee Jae Kim, Chang Young Kwon, Jeong Pil Choi, Seong Ho Kang
  • Publication number: 20090128532
    Abstract: A method for driving a plasma display panel is disclosed. The driving method alternately applies sustain pulses to a scanning electrode and a sustain electrode during a sustain period in a selective writing subfield followed by a selective erasing subfield. The driving method applies a first voltage to an address electrode in the selective writing subfield, the first voltage applied to the address electrode except a time when at least a last pair of sustain pulses is alternately applied to the scanning and sustain electrodes during the sustain period. The driving method applies a second voltage to the address electrode during the time when the last pair of sustain pulses is alternately applied to the scanning and sustain electrodes in the selective writing subfield. The driving method applies a second voltage to the address electrode during a sustain period in the selective erasing subfield.
    Type: Application
    Filed: January 7, 2009
    Publication date: May 21, 2009
    Inventor: Jeong Pil Choi
  • Patent number: 7532177
    Abstract: Disclosed herein is a method and apparatus for driving a plasma display panel, which improves contrast characteristics and preventing a low discharge making a cell non-luminous at a specific gray scale.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: May 12, 2009
    Assignee: LG Electronics Inc.
    Inventors: Chang Young Kwon, Seong Ho Kang, Hee Jae Kim, Jeong Pil Choi
  • Publication number: 20090109136
    Abstract: The present invention relates to a driving apparatus for supplying a driving signal to a plasma display panel, and a plasma display apparatus employing the same. A reset signal supplied during a reset period of a first subfield of a plurality of subfields includes a first rising period where a voltage rises up to a first voltage, and a first sustain period where the first voltage is sustained. A reset signal supplied during a reset period of a second subfield includes a second rising period where a voltage rises up to a second voltage lower than the first voltage, and a second sustain period where the second voltage is sustained. The second voltage is higher than a sustain voltage. In accordance with the present invention, if it is sought to reset discharge cells of a PDP in a reset period, a signal whose voltage gradually rises up to a voltage higher than the sustain voltage is applied to a scan electrode.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventors: Jeong Pil CHOI, Seong Ho KANG
  • Patent number: 7525516
    Abstract: A PDP energy recovery apparatus and method controls the time point of charging and discharging energy to a plasma display panel (PDP) optimally and performs a high speed addressing. The PDP energy recovery apparatus includes a PDP, a driving integrated circuit unit for driving the PDP; and a PDP energy recovery circuit units for supplying energy to the PDP, charging an electric charge in the PDP at the time point when the electric charge discharged from the PDP is outputted the smallest, discharging the electric charge charged in the PDP, to thereby quicken the operating speed of the PDP.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 28, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Patent number: 7525515
    Abstract: A PDP energy recovery apparatus and method controls the time point of charging and discharging energy to a plasma display panel (PDP) optimally and performs a high speed addressing. The PDP energy recovery apparatus includes a PDP, a driving integrated circuit unit for driving the PDP; and a PDP energy recovery circuit units for supplying energy to the PDP, charging an electric charge in the PDP at the time point when the electric charge discharged from the PDP is outputted the smallest, discharging the electric charge charged in the PDP, to thereby quicken the operating speed of the PDP.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 28, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Patent number: 7525517
    Abstract: A PDP energy recovery apparatus and method controls the time point of charging and discharging energy to a plasma display panel (PDP) optimally and performs a high speed addressing. The PDP energy recovery apparatus includes a PDP, a driving integrated circuit unit for driving the PDP; and a PDP energy recovery circuit units for supplying energy to the PDP, charging an electric charge in the PDP at the time point when the electric charge discharged from the PDP is outputted the smallest, discharging the electric charge charged in the PDP, to thereby quicken the operating speed of the PDP.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: April 28, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Publication number: 20090102825
    Abstract: The present invention relates to an energy recovery circuit for supplying driving signals to a plasma display panel (PDP), and a plasma display apparatus employing the same. The plasma display apparatus includes a PDP, and a driver for generating a driving signal for driving the PDP. The driver includes a first capacitor that charges a voltage recovered from the PDP, an inductor that forms a resonant circuit together with the first capacitor, a voltage source that supplies a voltage for generating the driving signal, and a second capacitor connected between one end of the inductor and a voltage source. According to the present invention, in the event that a driving signal is to be supplied to a PDP using an energy recovery circuit, a capacitor is connected to one end of the inductor of the energy recovery circuit.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 23, 2009
    Inventor: Jeong Pil CHOI
  • Patent number: 7514870
    Abstract: A plasma display panel and a method and apparatus for driving the same are provided that are capable of preventing miss-writing and improving discharge and light-emission efficiencies. In the panel, an upper substrate and a lower substrate are opposed to each other and have a plurality of discharge cells therebetween. A first upper electrode group is formed on the upper substrate and includes at least one electrode. A second upper electrode group is formed on the upper substrate in such a manner to be adjacent to the first upper electrode group and includes at least one electrode having a different width from the first upper electrode group. A data electrode is provided on the lower substrate in such a manner to be perpendicular to the first and second upper electrode groups.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: April 7, 2009
    Assignee: LG Electronics Inc.
    Inventors: Eun-Cheol Lee, Jae-Sung Kim, Young-Joon Ahn, Seok Dong Kang, Young-Kyo Shin, Sung-Yong Ahn, Song-Won Chi, Jae-Hong Lee, Tae-Wan Choi, Jeong-Pil Choi, Tae-Hyung Kim, Geun-Soo Lim
  • Patent number: 7511685
    Abstract: Provided are a method and apparatus for driving a PDP for widening a driving margin and improving contrast. The method for driving a PDP includes a first step of forming wall charges in cells with a set-up discharge using a set-up signal in a first sub-field and erasing the wall charges with a set-down discharge using a first set-down signal to initialize the cells, and a second step of erasing the wall charges with a set-down discharge generated using a second set-down signal different from the first set-down signal in a second sub-field, to initialize the cells. The method and apparatus for driving a PDP uniformly initialize sub-fields to widen the driving margin of PDP and remove a set-up discharge in at least one sub-field to improve the contrast of PDP.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: March 31, 2009
    Assignee: LG Electronics Inc.
    Inventors: Hee Jae Kim, Chang Young Kwon, Jeong Pil Choi, Seong Ho Kang
  • Patent number: 7511686
    Abstract: A PDP energy recovery apparatus and method controls the time point of charging and discharging energy to a plasma display panel (PDP) optimally and performs a high speed addressing. The PDP energy recovery apparatus includes a PDP, a driving integrated circuit unit for driving the PDP; and a PDP energy recovery circuit units for supplying energy to the PDP, charging an electric charge in the PDP at the time point when the electric charge discharged from the PDP is outputted the smallest, discharging the electric charge charged in the PDP, to thereby quicken the operating speed of the PDP.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: March 31, 2009
    Inventor: Jeong Pil Choi
  • Publication number: 20090058766
    Abstract: The present invention relates to a method for resetting a plasma display panel which can improve contrast by reducing unnecessary light in a set-up period, and apparatus thereof. The method for resetting the plasma display panel, includes the steps of: forming initial wall charges in the discharge cells by means of a reset discharge in a set-up period; and erasing unnecessary wall charges of the initial wall charges from the discharge cells by means of an erasing discharge in a set-down period, wherein a period where the sustain electrodes are floated during the set-up period is set in one or more sub-fields.
    Type: Application
    Filed: August 1, 2008
    Publication date: March 5, 2009
    Inventor: Jeong Pil CHOI
  • Patent number: 7489287
    Abstract: The present invention relates to a method for resetting a plasma display panel which can improve contrast by reducing unnecessary light in a set-up period, and apparatus thereof. The method for resetting the plasma display panel, includes the steps of: forming initial wall charges in the discharge cells by means of a reset discharge in a set-up period; and erasing unnecessary wall charges of the initial wall charges from the discharge cells by means of an erasing discharge in a set-down period, wherein a period where the sustain electrodes are floated during the set-up period is set in one or more sub-fields.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: February 10, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jeong Pil Choi
  • Patent number: 7479935
    Abstract: Disclosed is a plasma display apparatus and a method of driving the same. The plasma display apparatus and method of driving the same, in which a plasma display panel displays images by constituting a plurality of sub-fields including a reset period in one frame, are characterized in that: gray levels are controlled by applying a sustain voltage supplied during the sustain period of a specific one of the sub-fields at a different time than the sustain voltage supplied during the sustain period of the other sub-fields.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: January 20, 2009
    Assignee: LG Electronics Inc.
    Inventors: Jeong Pil Choi, Beong Ha Lim
  • Patent number: 7471263
    Abstract: Disclosed herein is an apparatus for driving a plasma display panel in which a gray scale inversion phenomenon can be prevented. According to the present invention, the apparatus for driving the PDP includes an error diffusion unit for diffusing error of data received from an inverse gamma correction unit, a gray scale inversion check unit connected to the inverse gamma correction unit, for checking whether a gray scale value of the data received from the inverse gamma correction unit is a gray scale value where a gray scale inversion phenomenon is generated, and generating a 1-bit control signal according to the check result, an adder disposed between the error diffusion unit and the gray scale inversion check unit, for adding the 1-bit control signal to lower bits of the data received from the error diffusion unit, and a dithering unit for performing dithering by using the lower bits received from the adder.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: December 30, 2008
    Assignee: LG Electronics Inc.
    Inventors: Jun Hak Lee, Jeong Pil Choi, Seong Hee Park