Patents by Inventor Eung Kwan Lee

Eung Kwan Lee 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: 7026765
    Abstract: An energy recovery apparatus including a sustaining voltage source for applying a sustaining voltage to a first electrode and a second electrode formed on an upper substrate; a equivalent capacitive load formed between the first electrode and the second electrode; and a power source capacitor disposed between the sustaining voltage source and a ground voltage source, for being charged with a voltage charged in the equivalent capacitive load and preventing a voltage drop phenomenon when a voltage of the sustaining voltage source is applied to the equivalent capacitive load.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: April 11, 2006
    Assignee: LG Electronics Inc.
    Inventor: Eung Kwan Lee
  • Patent number: 6956331
    Abstract: A plasma display panel driving method that is adaptive for improving contrast. In the method, at least one of the first and second electrodes keeps a floating state in an initialization period of at least one sub-field of a plurality of sub-fields.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: October 18, 2005
    Assignee: LG Electronics Inc.
    Inventors: Eun Cheol Lee, Eung Kwan Lee, Jae Hwa Ryu, Chung Hoo Park, Dong Hyun Kim, Sung Hyun Lee
  • Publication number: 20040212557
    Abstract: A plasma display panel and a driving method thereof that is capable of generating a sinusoidal initialization waveform. In the panel, a sinusoidal wave is used for forming wall charges.
    Type: Application
    Filed: July 10, 2003
    Publication date: October 28, 2004
    Inventors: Bon-Cheol Koo, Eung-Kwan Lee, Bong-Koo Kang, Young-Hwan Kim, Sang-Jin Yun, Yun-Kwon Jung, Ju-Won Seo, Joong-Min Ra, Bong-Hyun Lee, Hyun-Mok Yu
  • Publication number: 20040036686
    Abstract: There is disclosed an energy recovering circuit with boosting voltage-up and an energy efficient method using the same that are capable of boosting the voltage factor of an energy recovered from the panel to rapidly re-appl it to the panel, to thereby reduce the charging time of a panel capacitor and improve its energy recovery efficiency. An energy recovering circuit according to the present invention includes a voltage boosting circuit for boosting a voltage factor of an energy recovered from a panel and supplying the boosted energy to the panel. An energy efficient method according to the present invention includes steps of recovering an energy from a panel to a closed loop; and a controlling the closed loop in order to supplying the energy with its voltage factor boosted to the panel.
    Type: Application
    Filed: May 9, 2003
    Publication date: February 26, 2004
    Inventors: Jang-Hwan Cho, Nam-Kyu Lee, Cheul-U Kim, Feel-Soon Kang, Eung-Kwan Lee, Jae-Hwa Ryu, Sung-Ho Kang
  • Patent number: 6653795
    Abstract: A plasma display panel driving method and apparatus that is capable of driving a PDP at a high speed as well as improving the contrast. In the method, at least one selective writing sub-field is used to turn on discharge cells selected in an address interval. At least one selective erasing sub-field is used to turn off the discharge cells selected in the address interval. The selective writing sub-field and the selective erasing sub-field are arranged within one frame.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: November 25, 2003
    Assignee: LG Electronics Inc.
    Inventors: Seong Ho Kang, Jang Hwan Cho, Gop Sick Kim, Eung Kwan Lee
  • Publication number: 20030201726
    Abstract: There is explained a method and apparatus of driving a plasma display panel that is capable of increasing a driving margin upon a selective writing and a selective erasing in case that not only the selective writing but also the selective erasing are carried out within one frame period.
    Type: Application
    Filed: December 23, 2002
    Publication date: October 30, 2003
    Applicant: LG Electronics Inc.
    Inventors: Seong Ho Kang, Jang Hwan Cho, Gop Sick Kim, Eung Kwan Lee
  • Publication number: 20030117384
    Abstract: A plasma display panel driving method that is adaptive for improving contrast. In the method, at least one of the first and second electrodes keeps a floating state in an initialization period of at least one sub-field of a plurality of sub-fields.
    Type: Application
    Filed: October 9, 2002
    Publication date: June 26, 2003
    Inventors: Eun Cheol Lee, Eung Kwan Lee, Jae Hwa Ryu, Chung Hoo Park, Dong Hyun Kim, Sung Hyun Lee
  • Publication number: 20030098822
    Abstract: An apparatus and method for driving a plasma display panel wherein an initializing discharge can be weakened to lower a dark room brightness and an initialization time can be shortened to permit a single scanning. In the apparatus, a sensing device senses an electrical signal with an initialization waveform applied from a voltage source to a display panel. A controlling device controls said electrical signal with an initialization waveform applied from the voltage source to the display panel by the sensed electrical signal.
    Type: Application
    Filed: August 21, 2002
    Publication date: May 29, 2003
    Inventors: Chung Hoo Park, Dong Hyun Kim, Sung Hyun Lee, Young Kee Kim, Jeong Eun Heo, Joong Hong Shin, Ho Jun Lee, Eung Kwan Lee
  • Publication number: 20030099024
    Abstract: The present invention relates to an energy recovery apparatus without a source capacitor.
    Type: Application
    Filed: November 27, 2002
    Publication date: May 29, 2003
    Applicant: LG Electronics Inc.
    Inventor: Eung Kwan Lee
  • Publication number: 20020033675
    Abstract: A plasma display panel driving method and apparatus that is capable of driving a PDP at a high speed as well as improving the contrast. In the method, at least one selective writing sub-field is used to turn on discharge cells selected in an address interval. At least one selective erasing sub-field is used to turn off the discharge cells selected in the address interval. The selective writing sub-field and the selective erasing sub-field are arranged within one frame.
    Type: Application
    Filed: March 13, 2001
    Publication date: March 21, 2002
    Inventors: Seong Ho Kang, Jang Hwan Cho, Gop Sick Kim, Eung Kwan Lee
  • Patent number: 6281633
    Abstract: A plasma display panel driving apparatus that is capable of reducing the number of optical conductive devices. In the plasma display panel driving apparatus, a first controller generates control data for controlling the driving integrated circuits. A second controller drives the first controller. An optical conductive device for transmitting a light signal from the second control to the first control.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: August 28, 2001
    Assignee: LG Electronics Inc.
    Inventors: Eung Kwan Lee, Seong Ho Kang
  • Patent number: 6281635
    Abstract: A separate voltage driving apparatus for a plasma display panel that is capable of restraining an abnormal brightness caused by a characteristic deviation of the panel as well as preventing a damage of switching devices caused by an overcurrent. Any one of sustaining drivers of the apparatus can include a writing voltage generator, a sustaining voltage generator that generates pulses, each of which has a voltage level and a pulse width required for sustaining the writing discharge of the entire cells between the first and second electrodes, having a phase contrary to and being synchronized with each other, and an erasure scanning voltage generator. A voltage driving apparatus can further include a voltage recovering stage and a voltage input/output stage.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: August 28, 2001
    Assignee: LG Electronics Inc.
    Inventor: Eung Kwan Lee