Patents by Inventor Choong Keun Yoo

Choong Keun Yoo 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: 7811147
    Abstract: Provided are an organic electroluminescent device and a fabrication method thereof. The organic electroluminescent device includes a first substrate, a second substrate, an organic electroluminescent layer formed on the first substrate, a thin film transistor formed on the second substrate, and first and second seal lines attaching the first and second substrates to each other.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: October 12, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Jeong Hyun Kim, Jae Yoon Lee, Choong Keun Yoo, Heung Lyul Cho, Kang Ju Lee, Se Young Park
  • Publication number: 20100244070
    Abstract: A method of fabricating an organic light emitting display device includes forming a first electrode in both a luminescent region and a part of a non-luminescent region, forming a buffer layer in the non-luminescent region, forming an insulation pattern on the buffer layer in the non-luminescent region, forming an auxiliary electrode on the insulation pattern in the non-luminescent region, forming an organic emission layer in both the luminescent region and the non-luminescent region, forming a second electrode in both the luminescent region and the non-luminescent region, and applying over-voltage to the auxiliary electrode, the organic emission layer on the auxiliary electrode and the second electrode.
    Type: Application
    Filed: December 28, 2009
    Publication date: September 30, 2010
    Inventors: Jong-Kyun Lee, Choong-Keun Yoo
  • Patent number: 7799584
    Abstract: An attaching device and a method of manufacturing a light emitting device using the same are provided. The attaching device includes a process chamber, first and second supporters, and an open-close valve. The first and second supporters are disposed inside the process chamber to safely load and fix substrates. The open-close valve is disposed at a predetermined area of the process chamber to control a pressure inside the process chamber by opening and closing the process chamber. At least one of the first and second substrate supporters includes an electro static chuck including more than two of electrodes having different polarities and a polarity inverting unit for inverting polarities of the electrodes.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: September 21, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Choong Keun Yoo, Ae Kyung Jeon
  • Publication number: 20100136723
    Abstract: A dual panel-type organic electroluminescent display device includes a first substrate on which gate and data lines cross each other to define sub-pixels. Array elements are disposed at the sub-pixels on the first substrate. A first electrode is disposed on substantially the entire surface of a second substrate opposing the first substrate. An insulating pattern is disposed on the first electrode, an organic electroluminescent layer is disposed on the first electrode, and a second electrode is disposed on the organic electroluminescent layer at each sub-pixel. A connection pattern connects the array element and the second electrode at each sub-pixel. The connection pattern contacts the second electrode under the insulating pattern.
    Type: Application
    Filed: February 5, 2010
    Publication date: June 3, 2010
    Applicant: LG Display Co., Ltd.
    Inventors: Choong-Keun Yoo, Kwang-Yeon Lee
  • Patent number: 7710706
    Abstract: An apparatus for demagnetizing a shadow mask includes a shadow mask stocker, a cassette in the shadow mask stocker, wherein at least one shadow mask is disposed in the cassette, and a demagnetizing device that generates a magnetic field by an alternating current (AC), thereby removing magnetism of the at least one shadow mask.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: May 4, 2010
    Assignee: LG. Display Co., Ltd.
    Inventors: Choong-Keun Yoo, Kang-Ju Lee
  • Patent number: 7710021
    Abstract: An organic electroluminescent display (OELD) device comprises a first electrode on a first substrate having an active region and a non-active region at periphery of the active region, the active region including a plurality of pixel regions and the non-active region including a power supply region; an organic luminescent layer on the first electrode in the plurality of pixel regions; a first organic layer on the first electrode in the power supply region; a second organic layer on the first substrate in an outer region of the power supply region; a second electrode on the organic luminescent layer; a driving thin film transistor connected to the second electrode and formed on a second substrate; and a power supply terminal connected to the first organic layer and formed on the second substrate, wherein the first organic layer has substantially the same shape as the organic luminescent layer, and the second organic layer has substantially a different shape from the organic luminescent layer.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: May 4, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Choong-Keun Yoo, Kong-Ju Lee
  • Patent number: 7705532
    Abstract: An organic electroluminescent display device includes first and second substrates facing and spaced apart from each other. A first electrode resides on the first substrate and a separator having dual-layer, reciprocal L-shaped pattern resides on the first electrode. An organic emitting layer having a first thickness resides on the first electrode in a sub-pixel region and a second electrode resides on the organic emitting layer. An array element layer resides on the second substrate, the array element layer including a thin film transistor. A connection pattern electrically connects the second electrode and the thin film transistor.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: April 27, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Choong-Keun Yoo, Tae-Joon Ahn, Jong-Hyun Park
  • Patent number: 7683538
    Abstract: A dual panel-type organic electroluminescent display device includes a first substrate on which gate and data lines cross each other to define sub-pixels. Array elements are disposed at the sub-pixels on the first substrate. A first electrode is disposed on substantially the entire surface of a second substrate opposing the first substrate. An insulating pattern is disposed on the first electrode, an organic electroluminescent layer is disposed on the first electrode, and a second electrode is disposed on the organic electroluminescent layer at each sub-pixel. A connection pattern connects the array element and the second electrode at each sub-pixel. The connection pattern contacts the second electrode under the insulating pattern.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: March 23, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Choong-Keun Yoo, Kwang-Yeon Lee
  • Publication number: 20080203904
    Abstract: Provided are an organic electroluminescent device and a fabrication method thereof. The organic electroluminescent device includes a first substrate, a second substrate, an organic electroluminescent layer formed on the first substrate, a thin film transistor formed on the second substrate, and first and second seal lines attaching the first and second substrates to each other.
    Type: Application
    Filed: June 26, 2007
    Publication date: August 28, 2008
    Inventors: Jeong Hyun Kim, Jae Yoon Lee, Choong Keun Yoo, Heung Lyul Cho, Kang Ju Lee, Se Young Park
  • Publication number: 20080174239
    Abstract: An organic light emitting diode (OLED) device according to the present invention includes a first substrate; a first electrode on the first substrate in the pixel region, the first electrode formed of a metal; an organic light-emitting layer on the first electrode; a second electrode on the organic light-emitting layer, the second electrode formed of a transparent conductive material; and a transparent layer on the second electrode, the transparent layer including an inorganic material or a semiconductor material.
    Type: Application
    Filed: December 20, 2007
    Publication date: July 24, 2008
    Inventors: Choong Keun Yoo, Jeong Hyun Kim
  • Publication number: 20080157651
    Abstract: A method for manufacturing light emitting devices is provided. The method may reduce the inner pressure of a laminated image emitting device panel, thereby preventing failure of the panel. The method includes holding a first substrate with a lower chuck located in a vacuum chamber; holding a second substrate with an upper chuck located opposite the first chuck in the vacuum chamber; creating a high vacuum in the vacuum chamber; correcting positions of the first substrate and the second substrate; supplying gas having a temperature of about 50 to about 200° C. into the vacuum chamber; temporarily laminating the first substrate and the second substrate; venting the vacuum chamber; and bonding the first substrate and the second substrate. The panel is laminated after being filled with a heated gas and thus, when it is exposed to room temperature, the mobility of the gas decreases while reducing its initial inner pressure, thereby preventing panel failure.
    Type: Application
    Filed: November 20, 2007
    Publication date: July 3, 2008
    Inventors: Choong Keun Yoo, In Sun Yoo, Kang Ju Lee
  • Publication number: 20080122372
    Abstract: An organic electroluminescent display (OELD) device comprises a first electrode on a first substrate having an active region and a non-active region at periphery of the active region, the active region including a plurality of pixel regions and the non-active region including a power supply region; an organic luminescent layer on the first electrode in the plurality of pixel regions; a first organic layer on the first electrode in the power supply region; a second organic layer on the first substrate in an outer region of the power supply region; a second electrode on the organic luminescent layer; a driving thin film transistor connected to the second electrode and formed on a second substrate; and a power supply terminal connected to the first organic layer and formed on the second substrate, wherein the first organic layer has substantially the same shape as the organic luminescent layer, and the second organic layer has substantially a different shape from the organic luminescent layer.
    Type: Application
    Filed: June 26, 2007
    Publication date: May 29, 2008
    Inventors: Choong-Keun Yoo, Kong-Ju Lee
  • Patent number: 7321134
    Abstract: An organic electroluminescent display device according to an embodiment includes a connection electrode on a first substrate; and a luminescent element on a second substrate opposite to the first substrate, the luminescent element being connected to the connection electrode, the luminescent element having a contact part at least partially surrounded by a separator, wherein a first electrode, a second electrode and an organic common layer between the first electrode and the second electrode are located in the contact part.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: January 22, 2008
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: Choong Keun Yoo
  • Publication number: 20080012479
    Abstract: Provided are an organic electro-luminescence display device and a method of manufacturing the same. The organic electro-luminescence display device includes a first substrate, a second substrate facing the first substrate and including an organic electro-luminescence diode, and a sealant interposed between the first substrate and the second substrate to seal the organic electro-luminescence diode from outside and attach the first substrate to the second substrate. Herein, the sealant is formed of a frit glass.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 17, 2008
    Inventors: Choong Keun Yoo, In Sun Yoo, Kang Ju Lee
  • Publication number: 20080012476
    Abstract: An organic electro-luminescence display device includes a thin film transistor on a first substrate, where the thin film transistor has a drain region and a common electrode connected to the drain region. An organic electro-luminescence diode resides on a second substrate, where the organic electro-luminescence diode includes a spacer covered with a diode electrode. First and second sealant materials reside at a periphery of the first and second substrates, where the first sealant material surrounds the thin film transistor and the organic electro-luminescence diode, and the second sealant material surrounds an outer perimeter of the first sealant material. The first and second substrates are bonded together, such that the common electrode of the thin film transistor contacts the diode electrode of the organic electro-luminescence diode. The bonding process is carried out by sequentially sealing the first sealant material and the second sealant material.
    Type: Application
    Filed: June 22, 2007
    Publication date: January 17, 2008
    Inventors: Jeong Hyun Kim, Choong Keun Yoo, Kang Ju Lee
  • Publication number: 20080003706
    Abstract: An attaching device and a method of manufacturing a light emitting device using the same are provided. The attaching device includes a process chamber, first and second supporters, and an open-close valve. The first and second supporters are disposed inside the process chamber to safely load and fix substrates. The open-close valve is disposed at a predetermined area of the process chamber to control a pressure inside the process chamber by opening and closing the process chamber. At least one of the first and second substrate supporters includes an electro static chuck including more than two of electrodes having different polarities and a polarity inverting unit for inverting polarities of the electrodes.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 3, 2008
    Inventors: Choong Keun Yoo, Ae Kyung Jeon
  • Publication number: 20070296324
    Abstract: An apparatus for demagnetizing a shadow mask includes a shadow mask stocker, a cassette in the shadow mask stocker, wherein at least one shadow mask is disposed in the cassette, and a demagnetizing means that generates a magnetic field by an alternating current (AC), thereby removing magnetism of the at least one shadow mask.
    Type: Application
    Filed: June 22, 2007
    Publication date: December 27, 2007
    Inventors: Choong-Keun Yoo, Kang-Ju Lee
  • Patent number: 7311577
    Abstract: An organic electroluminescent device and methodology of fabricating the same includes first and second substrates facing and spaced apart from each other, the first and second substrates having a display region and a peripheral region, the display region including a plurality of pixel regions and a dummy pixel region; driving thin film transistors respectively adjacent to each of the plurality of pixel regions on the inner surface of the first substrate; first connection electrodes respectively connected to the driving thin film transistors; a first electrode on an entire inner surface of the second substrate; a sidewall on the first electrode at a boundary of each of the plurality of pixel regions and the dummy pixel region; an organic electroluminescent layer on the first electrode; second electrodes on the organic electroluminescent layer so that a second electrode is present in each of the plurality of pixel regions and the dummy pixel region, respectively, the second electrodes in each of the plurality o
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: December 25, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee
  • Patent number: 7309957
    Abstract: An organic electroluminescent display device includes first and second substrates bonded together, the first and second substrates having a plurality of pixel regions, a plurality of driving elements on an inner surface of the first substrate within each of the plurality of pixel regions, a plurality of connection electrodes contacting the driving elements, a black matrix on an inner surface of the second substrate at a boundary of each of the plurality of pixel regions, a color filter layer including red, green, and blue color filters on the inner surface of the second substrate, each of the red, green, and blue color filters corresponding to each of the plurality of pixel regions, a first electrode on the black matrix and the color filter layer, an organic electroluminescent layer on the first electrode, and at least one second electrode on the organic electroluminescent layer, wherein the at least one second electrode contacts the connection electrodes.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: December 18, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae-Yong Park, Sung-Ki Kim, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee, Kwan-Soo Kim
  • Patent number: 7304427
    Abstract: An organic electroluminescent device and methodology of fabricating the same includes first and second substrates facing and spaced apart from each other, the first and second substrates having a display region and a peripheral region, the display region including a plurality of pixel regions and a dummy pixel region; driving thin film transistors respectively adjacent to each of the plurality of pixel regions on the inner surface of the first substrate; first connection electrodes respectively connected to the driving thin film transistors; a first electrode on an entire inner surface of the second substrate; a sidewall on the first electrode at a boundary of each of the plurality of pixel regions and the dummy pixel region; an organic electroluminescent layer on the first electrode; second electrodes on the organic electroluminescent layer so that a second electrode is present in each of the plurality of pixel regions and the dummy pixel region, respectively, the second electrodes in each of the plurality o
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: December 4, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae-Yong Park, Choong-Keun Yoo, Ock-Hee Kim, Nam-Yang Lee