Patents by Inventor Beom-Rak Choi

Beom-Rak 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).

  • Publication number: 20100295051
    Abstract: An electro-luminescence device including an electro-luminescence element and a thin film transistor electrically connected to the electro-luminescence element. The thin film transistor includes a gate electrode formed over a substrate, an insulating layer formed over the gate electrode, and a first semiconductor pattern formed over the insulating layer. An etch stop layer is formed over the first semiconductor layer. A second semiconductor pattern is formed over the etch stop layer at one side of the etch stop layer, and a third semiconductor pattern is formed over the etch stop layer at another side of the etch stop layer. A source electrode is formed over the second semiconductor pattern, and a drain electrode is formed over the third semiconductor pattern.
    Type: Application
    Filed: August 2, 2010
    Publication date: November 25, 2010
    Inventors: JOON-HOO CHOI, In-Su Joo, Beom-Rak Choi, Jong-Moo Huh
  • Patent number: 7768011
    Abstract: An electro-luminescence device including an electro-luminescence element and a thin film transistor electrically connected to the electro-luminescence element. The thin film transistor includes a gate electrode formed over a substrate, an insulating layer formed over the gate electrode, and a first semiconductor pattern formed over the insulating layer. An etch stop layer is formed over the first semiconductor layer. A second semiconductor pattern is formed over the etch stop layer at one side of the etch stop layer, and a third semiconductor pattern is formed over the etch stop layer at another side of the etch stop layer. A source electrode is formed over the second semiconductor pattern, and a drain electrode is formed over the third semiconductor pattern.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: August 3, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Joon-Hoo Choi, In-Su Joo, Beom-Rak Choi, Jong-Moo Huh
  • Patent number: 7592635
    Abstract: Disclosed is an organic electroluminescent (EL) device for enhancing the luminous efficiency. A first electrode is formed on a substrate. A CVD insulating film of low dielectric constant having an opening exposing the first electrode is formed on the first electrode and the substrate. An organic EL layer and a second electrode are sequentially stacked on the opening. A wall surrounding a region of the organic EL layer is formed of the CVD insulating film of low dielectric constant, the surface treatment of the pixel electrode can be performed using O2 plasma enhance luminance properties.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: September 22, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Koo Chung, Beom-Rak Choi, Joon-Hoo Choi, Sang-Gab Kim, Hee-Hwan Choe
  • Publication number: 20090152557
    Abstract: An electro-luminescence device including an electro-luminescence element and a thin film transistor electrically connected to the electro-luminescence element. The thin film transistor includes a gate electrode formed over a substrate, an insulating layer formed over the gate electrode, and a first semiconductor pattern formed over the insulating layer. An etch stop layer is formed over the first semiconductor layer. A second semiconductor pattern is formed over the etch stop layer at one side of the etch stop layer, and a third semiconductor pattern is formed over the etch stop layer at another side of the etch stop layer. A source electrode is formed over the second semiconductor pattern, and a drain electrode is formed over the third semiconductor pattern.
    Type: Application
    Filed: February 19, 2009
    Publication date: June 18, 2009
    Inventors: JOON-HOO CHOI, In-Su Joo, Beom-Rak Choi, Jong-Moo Huh
  • Patent number: 7501658
    Abstract: An electro-luminescence device including an electro-luminescence element and a thin film transistor electrically connected to the electro-luminescence element. The thin film transistor includes a gate electrode formed over a substrate, an insulating layer formed over the gate electrode, and a first semiconductor pattern formed over the insulating layer. An etch stop layer is formed over the first semiconductor layer. A second semiconductor pattern is formed over the etch stop layer at one side of the etch stop layer, and a third semiconductor pattern is formed over the etch stop layer at another side of the etch stop layer. A source electrode is formed over the second semiconductor pattern, and a drain electrode is formed over the third semiconductor pattern.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: March 10, 2009
    Assignee: Samsung Electronics, Co., Ltd.
    Inventors: Joon-Hoo Choi, In-Su Joo, Beom-Rak Choi, Jong-Moo Huh
  • Publication number: 20090009094
    Abstract: Disclosed are an active matrix type organic electroluminescent display device and a manufacturing method thereof. At least two capacitors having different functions from each other are disposed in a vertically stacked structure within a unit pixel region. When a compensation circuit needing two or more capacitors having different functions from each other per pixel is applied, the two or more capacitors are vertically stacked, thereby preventing the aperture ratio from being lowered due to the increase in the number of capacitors within the pixel.
    Type: Application
    Filed: September 11, 2008
    Publication date: January 8, 2009
    Inventors: Beom-Rak CHOI, Joon-Hoo Choi, Chong-Chul Chai
  • Publication number: 20080265765
    Abstract: There are provided an organic EL device and a method of fabricating the same. An effective display area on which an anode electrode, an organic luminescence layer and a cathode electrode are formed is sealed by means of a metal can, a glass cap or an organic/inorganic material. A power source is applied to the anode and the cathode electrodes through a power transferring part extended from the effective display area to a non-effective display area. Accordingly, it is possible to reduce the oxidation of the cathode electrode of the organic EL device, thereby preventing the electrical contact characteristics of the cathode electrode from being deteriorated.
    Type: Application
    Filed: June 19, 2008
    Publication date: October 30, 2008
    Inventors: Joon-Hoo Choi, Beom-Rak Choi, Chong-Chul Chai, Jin-Koo Chung
  • Patent number: 7435992
    Abstract: Disclosed are an active matrix type organic electroluminescent display device and a manufacturing method thereof. At least two capacitors having different functions from each other are disposed in a vertically stacked structure within a unit pixel region. When a compensation circuit needing two or more capacitors having different functions from each other per pixel is applied, the two or more capacitors are vertically stacked, thereby preventing the aperture ratio from being lowered due to the increase in the number of capacitors within the pixel.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: October 14, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Beom-Rak Choi, Joon-Hoo Choi, Chong-Chul Chai
  • Patent number: 7394193
    Abstract: There are provided an organic EL device and a method of fabricating the same. An effective display area on which an anode electrode, an organic luminescence layer and a cathode electrode are formed is sealed by means of a metal can, a glass cap or an organic/inorganic material. A power source is applied to the anode and the cathode electrodes through a power transferring part extended from the effective display area to a non-effective display area. Accordingly, it is possible to reduce the oxidation of the cathode electrode of the organic EL device, thereby preventing the electrical contact characteristics of the cathode electrode from being deteriorated.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: July 1, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joon-Hoo Choi, Beom-Rak Choi, Chong-Chul Chai, Jin-Koo Chung
  • Publication number: 20080067930
    Abstract: An organic light emitting display is provided, which includes: a first electrode formed on a substrate; a partition having an opening exposing the first electrode at least in part; an auxiliary electrode formed on the partition and having substantially the same planar shape as the partition; an organic light emitting member formed on the first electrode and disposed substantially in the opening; and a second electrode formed on the light emitting member and the auxiliary electrode.
    Type: Application
    Filed: November 20, 2007
    Publication date: March 20, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.,
    Inventors: Jin-Koo CHUNG, Joon-Hoo CHOI, Beom-Rak CHOI
  • Patent number: 7336031
    Abstract: An organic light emitting display is provided, which includes: a first electrode formed on a substrate; a partition having an opening exposing the first electrode at least in part; an auxiliary electrode formed on the partition and having substantially the same planar shape as the partition; an organic light emitting member formed on the first electrode and disposed substantially in the opening; and a second electrode formed on the light emitting member and the auxiliary electrode.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: February 26, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Koo Chung, Joon-Hoo Choi, Beom-Rak Choi
  • Publication number: 20080006825
    Abstract: An electro-luminescence device including an electro-luminescence element and a thin film transistor electrically connected to the electro-luminescence element. The thin film transistor includes a gate electrode formed over a substrate, an insulating layer formed over the gate electrode, and a first semiconductor pattern formed over the insulating layer. An etch stop layer is formed over the first semiconductor layer. A second semiconductor pattern is formed over the etch stop layer at one side of the etch stop layer, and a third semiconductor pattern is formed over the etch stop layer at another side of the etch stop layer. A source electrode is formed over the second semiconductor pattern, and a drain electrode is formed over the third semiconductor pattern.
    Type: Application
    Filed: September 20, 2007
    Publication date: January 10, 2008
    Inventors: Joon-Hoo Choi, In-Su Joo, Beom-Rak Choi, Jong-Moo Huh
  • Patent number: 7288477
    Abstract: An electro-luminescence device including an electro-luminescence element and a thin film transistor electrically connected to the electro-luminescence element. The thin film transistor includes a gate electrode formed over a substrate, an insulating layer formed over the gate electrode, and a first semiconductor pattern formed over the insulating layer. An etch stop layer is formed over the first semiconductor layer. A second semiconductor pattern is formed over the etch stop layer at one side of the etch stop layer, and a third semiconductor pattern is formed over the etch stop layer at another side of the etch stop layer. A source electrode is formed over the second semiconductor pattern, and a drain electrode is formed over the third semiconductor pattern.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: October 30, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joon-Hoo Choi, In-Su Joo, Beom-Rak Choi, Jong-Moo Huh
  • Patent number: 7229860
    Abstract: A manufacturing method of a thin film transistor. An amorphous silicon thin film is formed on an insulating substrate, and is crystallized by a lateral solidification process with illumination of laser beams into the amorphous silicon thin film to form a polysilicon thin film. Next, protrusion portions protruding from the surface of the polysilicon thin film are removed by plasma dry-etching using a gas mixture including Cl2, SF6 and Ar at the ratio of 3:1:2 to smooth the surface of the polysilicon thin film, and the semiconductor layer is formed by patterning the polysilicon thin film. A gate insulating film covering the semiconductor layer is formed and a gate electrode is formed on the gate insulating film opposite the semiconductor layer.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: June 12, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jean-Ho Song, Joon-Hoo Choi, Beom-Rak Choi, Myung-Koo Kang, Sook-Young Kang
  • Patent number: 7205968
    Abstract: There are provided an organic El device and a method of fabricating the same. Each of anode electrodes includes an organic luminescence layer disposed thereon, and a cathode electrode separately disposed on each of the organic luminescence layers. Each cathode electrode receives a power source suitable for operation properties of each of the organic luminescence layers. Accordingly, an improved image may be displayed in a full-color display.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: April 17, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joon-Hoo Choi, Beom-Rak Choi, Chong-Chul Chai, Jin-Koo Chung
  • Publication number: 20070063637
    Abstract: There are provided an organic EL device and a method of fabricating the same. An effective display area on which an anode electrode, an organic luminescence layer and a cathode electrode are formed is sealed by means of a metal can, a glass cap or an organic/inorganic material. A power source is applied to the anode and the cathode electrodes through a power transferring part extended from the effective display area to a non-effective display area. Accordingly, it is possible to reduce the oxidation of the cathode electrode of the organic EL device, thereby preventing the electrical contact characteristics of the cathode electrode from being deteriorated.
    Type: Application
    Filed: September 1, 2006
    Publication date: March 22, 2007
    Inventors: Joon-Hoo Choi, Beom-Rak Choi, Chong-Chul Chai, Jin-Koo Chung
  • Patent number: 7102281
    Abstract: There are provided an organic EL device and a method of fabricating the same. An effective display area on which an anode electrode, an organic luminescence layer and a cathode electrode are formed is sealed by means of a metal can, a glass cap or an organic/inorganic material. A power source is applied to the anode and the cathode electrodes through a power transferring part extended from the effective display area to a non-effective display area. Accordingly, it is possible to reduce the oxidation of the cathode electrode of the organic EL device, thereby preventing the electrical contact characteristics of the cathode electrode from being deteriorated.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: September 5, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joon-Hoo Choi, Beom-Rak Choi, Chong-Chul Chai, Jin-Koo Chung
  • Publication number: 20050242714
    Abstract: Disclosed is an organic electroluminescent (EL) device for enhancing the luminous efficiency. A first electrode is formed on a substrate. A CVD insulating film of low dielectric constant having an opening exposing the first electrode is formed on the first electrode and the substrate. An organic EL layer and a second electrode are sequentially stacked on the opening. A wall surrounding a region of the organic EL layer is formed of the CVD insulating film of low dielectric constant, the surface treatment of the pixel electrode can be performed using O2 plasma to thereby enhance luminance properties.
    Type: Application
    Filed: December 24, 2002
    Publication date: November 3, 2005
    Inventors: Jin-Koo Chung, Beom-Rak Choi, Joon-Hoo Choi, Sang-Gab Kim, Hee-Hwan Choe
  • Publication number: 20050156829
    Abstract: A pixel circuit of an organic EL display includes an EL device, first and second switching devices, a driving thin film transistor, and a capacitor. The first switching device switches data voltages applied to data lines in response to the selection signal applied to a scan line and the second switching device connects gate and drain of the driving thin film transistor in response to a compensation signal applied to a compensation line. The driving thin film transistor supplies electric current to the organic EL device in response to the data voltage inputted to a gate from the first switching device and the capacitor maintains the data voltage applied to the gate of the driving thin film transistor for a predetermined period.
    Type: Application
    Filed: September 19, 2002
    Publication date: July 21, 2005
    Inventors: Beom-Rak Choi, Joon-Hoo Choi, Chong-Chul Chae, Woong-Kyu Min, Jyong-Ju Shin
  • Publication number: 20050130357
    Abstract: A manufacturing method of a thin film transistor. An amorphous silicon thin film is formed on an insulating substrate, and is crystallized by a lateral solidification process with illumination of laser beams into the amorphous silicon thin film to form a polysilicon thin film. Next, protrusion portions protruding from the surface of the polysilicon thin film are removed by plasma dry-etching using a gas mixture including Cl2, SF6 and Ar at the ratio of 3:1:2 to smooth the surface of the polysilicon thin film, and the semiconductor layer is formed by patterning the polysilicon thin film. A gate insulating film covering the semiconductor layer is formed and a gate electrode is formed on the gate insulating film opposite the semiconductor layer.
    Type: Application
    Filed: January 29, 2002
    Publication date: June 16, 2005
    Inventors: Jean-Ho Song, Joon-Hoo Choi, Beom-Rak Choi, Myung-Koo Kang, Sook-Young Kang