Patents by Inventor Ho-Kyoon Chung

Ho-Kyoon Chung 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: 20090291237
    Abstract: The invention is directed to an organic electroluminescent (EL) display device having an improved light extracting efficiency due to a photonic crystal layer formed proximate one side of a stack. Among other elements, the stack may include a first electrode formed on a substrate, an organic light emitting layer formed above the first electrode, and a second electrode formed above the organic light emitting layer. Additionally, the photonic crystal layer may be configured to correspond to a wavelength of colored light. An organic EL display device having an improved light extracting efficiency may be manufactured using a thermal transfer donor film to adhere the photonic crystal layer to the stack.
    Type: Application
    Filed: August 5, 2009
    Publication date: November 26, 2009
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Jin-Woo Park, Ho-Kyoon Chung, Jang-Hyuk Kwon, Mu-Hyun Kim, Seung-Yong Song, Young-Rag Do, Yoon-Chang Kim, Tae-Min Kang, Seong-Taek Lee
  • Patent number: 7589461
    Abstract: The invention is directed to an organic electroluminescent (EL) display device having an improved light extracting efficiency due to a photonic crystal layer formed proximate one side of a stack. Among other elements, the stack may include a first electrode formed on a substrate, an organic light emitting layer formed above the first electrode, and a second electrode formed above the organic light emitting layer. Additionally, the photonic crystal layer may be configured to correspond to a wavelength of colored light. An organic EL display device having an improved light extracting efficiency may be manufactured using a thermal transfer donor film to adhere the photonic crystal layer to the stack.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: September 15, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jin-Woo Park, Ho-Kyoon Chung, Jang-Hyuk Kwon, Mu-Hyun Kim, Seung-Yong Song, Young-Rag Do, Yoon-Chang Kim, Tae-Min Kang, Seong-Taek Lee
  • Patent number: 7579199
    Abstract: A flexible flat panel display where nanoparticles are used for the active layer of the TFTs and the substrate is flexible and can be manufactured at room temperature, a flat panel display device having the same, a method of manufacturing a TFT, a method of manufacturing a flat panel display device, and a method of manufacturing a donor sheet. In making the TFTs in the display, a donor sheet is used to transfer the nanoparticles from the sheet to the substrate. The thin film transistor is placed on a substrate and includes a channel region which has at least one P-type or N-type nanoparticle arranged in a lengthwise direction, wherein the lengthwise direction of the P-type or N-type nanoparticles is parallel to a P-type or an N-type nanoparticle line partitioned off on the substrate.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: August 25, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Min-Chul Suh, Nam-Choul Yang, Jae-Bon Koo, Hye-Dong Kim, Ho-Kyoon Chung, Ul-Ho Lee
  • Publication number: 20090195153
    Abstract: An organic electroluminescent display device improves driving characteristics at a high temperature and storage characteristics of the organic electroluminescent display device, and prevents pixel contraction phenomena of the device by providing an organic electroluminescent display device comprising a substrate, a first electrode and a second electrode formed on the substrate, and an organic film layer comprising at least one emitting layer between the first electrode and the second electrode. The emitting layer includes at least one phosphorescent dopant, and the dopant is represented by L3M or L2ML?, wherein the M is a transition metal selected from the group consisting of Ir, Pt, Zn and Os, the L and L? are bidendate ligands coordinated with carbon and nitrogen, and at least one of the L and L? has 15 or more carbon atoms in the ligand.
    Type: Application
    Filed: March 17, 2009
    Publication date: August 6, 2009
    Applicant: Samsung Mobile Display
    Inventors: Jun-Yeob Lee, Yong-Joong Choi, Jang-Hyuk Kwon, Ho-Kyoon Chung
  • Patent number: 7553720
    Abstract: A non-volatile memory device includes a buffer oxide film on a substrate; a polysilicon layer on the buffer oxide film; a silicon oxy-nitride (SiON) layer on the polysilicon layer, a first insulator layer on the SiON layer, a nitride film on the first insulator, a second insulator layer on the nitride film, an electrode on the second insulator, and a source/drain in the polysilicon layer.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: June 30, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Byoung Deog Choi, Ki Yong Lee, Ho Kyoon Chung, Jun Sin Yi, Sung Wook Jung, Hyun Min Kim, Jun Sik Kim
  • Publication number: 20090129047
    Abstract: A double-sided light emitting device including lower and upper substrates, an emission element formed between an inner surface of the upper substrate and an inner surface of the lower substrate and emitting predetermined light, an upper layer of polarizing material disposed on at least one of inner and outer surfaces of the upper substrate, and a lower layer of polarizing material disposed on at least one of inner and outer surfaces of the lower substrate.
    Type: Application
    Filed: January 7, 2009
    Publication date: May 21, 2009
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Jin-Woo Park, Ho-Kyoon Chung, Sun-Hwa Kim, Byung-Hee Kim
  • Publication number: 20090116211
    Abstract: A double-sided light emitting device including lower and upper substrates, an emission element formed between an inner surface of the upper substrate and an inner surface of the lower substrate and emitting predetermined light, an upper layer of polarizing material disposed on at least one of inner and outer surfaces of the upper substrate, and a lower layer of polarizing material disposed on at least one of inner and outer surfaces of the lower substrate.
    Type: Application
    Filed: January 7, 2009
    Publication date: May 7, 2009
    Applicant: Samsung Mobile Display Co., Ltd.
    Inventors: Jin-Woo Park, Ho-Kyoon Chung, Sun-Hwa Kim, Byung-Hee Kim
  • Patent number: 7521130
    Abstract: An organic electroluminescent display device improves driving characteristics at a high temperature and storage characteristics of the organic electroluminescent display device, and prevents pixel contraction phenomena of the device by providing an organic electroluminescent display device comprising a substrate, a first electrode and a second electrode formed on the substrate, and an organic film layer comprising at least one emitting layer between the first electrode and the second electrode. The emitting layer includes at least one phosphorescent dopant, and the dopant is represented by L3M or L2ML?, wherein the M is a transition metal selected from the group consisting of Ir, Pt, Zn and Os, the L and L? are bidendate ligands coordinated with carbon and nitrogen, and at least one of the L and L? has 15 or more carbon atoms in the ligand.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: April 21, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jun-Yeob Lee, Yong-Joong Choi, Jang-Hyuk Kwon, Ho-Kyoon Chung
  • Patent number: 7517593
    Abstract: A donor substrate for a laser induced thermal imaging method and an organic electroluminescent display device fabricated using the same are provided. The donor substrate may be constructed with base film; a light-to-heat conversion layer formed on the base film; a buffer layer formed on the entire surface of the light-to-heat conversion layer; a metal layer formed on the buffer layer; and a transfer layer formed of an organic material and formed on the metal layer, thereby enhancing the characteristics of a transfer pattern by transferring a small molecular material using the laser induced thermal imaging method.
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: April 14, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Myung-Won Song, Ho-Kyoon Chung, Seong-Taek Lee, Mu-Hyun Kim, Byung-Doo Chin, Tae-Min Kang, Jae-Ho Lee
  • Patent number: 7492095
    Abstract: A double-sided light emitting device including lower and upper substrates, an emission element formed between an inner surface of the upper substrate and an inner surface of the lower substrate and emitting predetermined light, an upper layer of polarizing material disposed on at least one of inner and outer surfaces of the upper substrate, and a lower layer of polarizing material disposed on at least one of inner and outer surfaces of the lower substrate.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: February 17, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jin-Woo Park, Ho-Kyoon Chung, Sun-Hwa Kim, Byung-Hee Kim
  • Patent number: 7414599
    Abstract: A pixel circuit in an organic light emitting device capable of realizing high gradation representation by self-compensating a threshold voltage, and a method for driving the same. The pixel circuit includes an electroluminescent element for emitting light in response to an applied driving current. A first transistor delivers a data signal voltage in response to a current scan line signal. A second transistor generates a driving current to drive the electroluminescent element in response to the data signal voltage. A third transistor connects the second transistor in the form of a diode in response to a current scan signal to self-compensate the threshold voltage of the second transistor. A capacitor stores the data signal voltage delivered to the second transistor. A fourth transistor delivers a power supply voltage to the second transistor in response to a current light-emitting signal.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: August 19, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ho-Kyoon Chung, Yang-Wan Kim, Choon-Yul Oh, Oh-Kyong Kwon, Sang-Moo Choi
  • Publication number: 20080176349
    Abstract: A flexible flat panel display where nanoparticles are used for the active layer of the TFTs and the substrate is flexible and can be manufactured at room temperature, a flat panel display device having the same, a method of manufacturing a TFT, a method of manufacturing a flat panel display device, and a method of manufacturing a donor sheet. In making the TFTs in the display, a donor sheet is used to transfer the nanoparticles from the sheet to the substrate. The thin film transistor is placed on a substrate and includes a channel region which has at least one P-type or N-type nanoparticle arranged in a lengthwise direction, wherein the lengthwise direction of the P-type or N-type nanoparticles is parallel to a P-type or an N-type nanoparticle line partitioned off on the substrate.
    Type: Application
    Filed: December 21, 2007
    Publication date: July 24, 2008
    Inventors: Min-Chul Suh, Nam-Choul Yang, Jae-Bon Koo, Hye-Dong Kim, Ho-Kyoon Chung, Ul-Ho Lee
  • Patent number: 7388223
    Abstract: An organic light emitting device, and a method of fabricating the same, has a cathode electrode that can prevent oxygen or moisture from infiltrating. The organic light emitting device of the present invention has a lower electrode, an organic thin film layer and an upper electrode successively formed on the substrate. The upper electrode has at least two-layered thin films having different grain density and grain size. A lower film of the at least two-layered thin films of the upper electrode has a first Al thin film having a lower grain density and larger grain size than an upper of the at least two-layered thin films. The upper film has a second Al thin film having relatively higher grain density and smaller grain size than the first Al thin film.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: June 17, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-Woo Park, Ho-Kyoon Chung
  • Patent number: 7381579
    Abstract: A flexible flat panel display where nanoparticles are used for an active layer and the substrate is a flexible plastic, a method of manufacturing the same, a method of manufacturing a thin film transistor (TFT) using the donor sheet, and a method of manufacturing a flat panel display device using the donor sheet. In making the TFTs in the display, a donor sheet is used to transfer the nanoparticles from the sheet to the substrate. The donor sheet can be manufactured at room temperature. The donor sheet has a base film, and a transfer layer being disposed at one side of the base film and transferable, wherein the transfer layer has a plurality of nanoparticles which are arranged to be approximately parallel to one another.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: June 3, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Min-Chul Suh, Nam-Choul Yang, Jae-Bon Koo, Hye-Dong Kim, Ho-Kyoon Chung, Ul-Ho Lee
  • Patent number: 7378711
    Abstract: A flexible flat panel display where nanoparticles are used for the active layer of the TFTs and the substrate is flexible and can be manufactured at room temperature, a flat panel display device having the same, a method of manufacturing a TFT, a method of manufacturing a flat panel display device, and a method of manufacturing a donor sheet. In making the TFTs in the display, a donor sheet is used to transfer the nanoparticles from the sheet to the substrate. The thin film transistor is placed on a substrate and includes a channel region which has at least one P-type or N-type nanoparticle arranged in a lengthwise direction, wherein the lengthwise direction of the P-type or N-type nanoparticles is parallel to a P-type or an N-type nanoparticle line partitioned off on the substrate.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: May 27, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Min-Chul Suh, Nam-Choul Yang, Jae-Bon Koo, Hye-Dong Kim, Ho-Kyoon Chung, Ul-Ho Lee
  • Publication number: 20080081105
    Abstract: An organic light-emitting device has a color modulation layer. The method of fabricating an organic light-emitting device comprises providing a substrate, forming a first electrode positioned on the substrate and forming a second electrode positioned on the first electrode, wherein at least one of the first electrode and the second electrode is transparent. An organic functional layer having at least an emission layer is interposed between the first electrode and the second electrode. A color modulation layer formed by a laser-induced thermal imaging method is positioned on a surface opposite to a surface adjacent to the emission layer of the transparent electrode, wherein the color modulation layer is at least one of a color filter and a color conversion medium.
    Type: Application
    Filed: November 1, 2007
    Publication date: April 3, 2008
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Min-Chul SUH, Ho-Kyoon CHUNG, Seong-Taek LEE, Jang-Hyuk KWON
  • Patent number: 7339315
    Abstract: An organic light-emitting device has a color modulation layer. The organic light-emitting device comprises a substrate, a first electrode positioned on the substrate and a second electrode positioned on the first electrode, wherein at least one of the first electrode and the second electrode is transparent. An organic functional layer having at least an emission layer is interposed between the first electrode and the second electrode. A color modulation layer formed by a laser-induced thermal imaging method is positioned on a surface opposite to a surface adjacent to the emission layer of the transparent electrode, wherein the color modulation layer is at least one of a color filter and a color conversion medium.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: March 4, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Min-Chul Suh, Ho-Kyoon Chung, Seong-Taek Lee, Jang-Hyuk Kwon
  • Patent number: 7307281
    Abstract: A method of manufacturing an organic electroluminescent display device includes preparing an auxiliary substrate, which has a flat side; forming a first protective layer on the auxiliary substrate; forming an organic electroluminescent unit on the first protective layer; bonding a flexible main substrate onto the organic electroluminescent unit; and etching the auxiliary substrate to remove the same.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: December 11, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-woo Park, Ho-Kyoon Chung, Seung-yong Song
  • Publication number: 20070207696
    Abstract: A flat panel display includes a glass substrate, an organic light-emitting part, and a sealing part. The organic light-emitting part includes one or more organic light-emitting devices (OLED) formed on a surface of the glass substrate, which has a thickness of about 0.05 mm to about 0.5 mm. The sealing part seals the organic light-emitting part and protects it from damage during the manufacturing process. A method for manufacturing the flat panel display includes preparing a glass substrate of approximately 0.7 mm thickness or greater; forming a plurality of organic light-emitting devices on a surface of the glass substrate, wherein a group of one or more of the plurality of organic light-emitting devices constitutes an organic light-emitting part; sealing each organic light-emitting part; and etching the glass substrate to a predetermined thickness.
    Type: Application
    Filed: May 8, 2007
    Publication date: September 6, 2007
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Jin-Woo Park, Jang-Hyuk Kwon, Ho-Kyoon Chung
  • Patent number: 7230374
    Abstract: An organic light-emitting device has a color modulation layer. The organic light-emitting device comprises a substrate, a first electrode positioned on the substrate and a second electrode positioned on the first electrode, wherein at least one of the first electrode and the second electrode is transparent. An organic functional layer having at least an emission layer emitting white color light is interposed between the first electrode and the second electrode. A color modulation layer formed by a laser-induced thermal imaging method is positioned on a surface opposite to a surface adjacent to the emission layer of the transparent electrode, wherein the color modulation layer has at least a color conversion medium.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: June 12, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Min-Chul Suh, Ho-Kyoon Chung, Seong-Taek Lee, Jang-Hyuk Kwon