Patents by Inventor Hee-Joo Ko

Hee-Joo Ko 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: 9911938
    Abstract: In a method of manufacturing a quantum dot, a core may be formed using (utilizing) at least one cation precursor and at least one anion precursor. The core may be reacted with a shell forming precursor and a ligand forming precursor for more than one hour to form a shell enclosing the core and a ligand. A nanoparticle including the core, the shell and the ligand may be washed.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: March 6, 2018
    Assignees: Samsung Display Co., Ltd., Industry-Academia Cooperation Foundation, Hongik University
    Inventors: Hee-Joo Ko, Hee-Sun Yang, Ki-Heon Lee, Jeong-Hoon Lee, Chang-Ho Lee
  • Patent number: 9825244
    Abstract: Provided is an organic light-emitting device including a first electrode, a second electrode disposed opposite to the first electrode, an emission layer disposed between the first electrode and the second electrode, and an electron-transporting layer disposed between the emission layer and the second electrode. The electron-transporting layer includes a first electron-transporting material and a second electron-transporting material. The lowest unoccupied molecular orbital (LUMO) energy level of the first electron-transporting material (EL1) and the lowest unoccupied molecular orbital (LUMO) energy level of the second electron-transporting material (EL2) satisfy the equation 0.1 eV?|EL1?EL2|?0.3 eV.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: November 21, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se-Jin Cho, Chang-Ho Lee, Dae-Yup Shin, Young-Mok Son, Il-Soo Oh, Hee-Joo Ko, Jin-Young Yun, Bo-Ra Lee, Yeon-Woo Lee, Beom-Joon Kim, Pyung-Eun Jeon, Hyun-Ju Choi, Chang-Min Lee
  • Publication number: 20170133615
    Abstract: In a method of manufacturing a quantum dot, a core may be formed using (utilizing) at least one cation precursor and at least one anion precursor. The core may be reacted with a shell forming precursor and a ligand forming precursor for more than one hour to form a shell enclosing the core and a ligand. A nanoparticle including the core, the shell and the ligand may be washed.
    Type: Application
    Filed: January 25, 2017
    Publication date: May 11, 2017
    Inventors: Hee-Joo Ko, Hee-Sun Yang, Ki-Heon Lee, Jeong-Hoon Lee, Chang-Ho Lee
  • Patent number: 9559322
    Abstract: In a method of manufacturing a quantum dot, a core may be formed using (utilizing) at least one cation precursor and at least one anion precursor. The core may be reacted with a shell forming precursor and a ligand forming precursor for more than one hour to form a shell enclosing the core and a ligand. A nanoparticle including the core, the shell and the ligand may be washed.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: January 31, 2017
    Assignees: Samsung Display Co., Ltd., Industry-Academia Cooperation Foundation, Hongik University
    Inventors: Hee-Joo Ko, Hee-Sun Yang, Ki-Heon Lee, Jeong-Hoon Lee, Chang-Ho Lee
  • Patent number: 9515280
    Abstract: An organic light emitting device, and a manufacturing method of the same, in which in a light emitting layer, an electron trap material is introduced so as to improve a light emitting property and an operating characteristic and to prolong a life span.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: December 6, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin-Young Yun, Chang-Ho Lee, Dae-Yup Shin, Young-Mok Son, Il-Soo Oh, Hee-Joo Ko, Se-Jin Cho, Bo-Ra Lee, Yeon-Woo Lee, Beom-Joon Kim, Jung-Geun Lee, Young-Woo Song
  • Publication number: 20160308157
    Abstract: Provided is an organic light-emitting device including a first electrode, a second electrode disposed opposite to the first electrode, an emission layer disposed between the first electrode and the second electrode, and an electron-transporting layer disposed between the emission layer and the second electrode. The electron-transporting layer includes a first electron-transporting material and a second electron-transporting material. The lowest unoccupied molecular orbital (LUMO) energy level of the first electron-transporting material (EL1) and the lowest unoccupied molecular orbital (LUMO) energy level of the second electron-transporting material (EL2) satisfy the equation 0.1 eV?|EL1?EL2|?0.3 eV.
    Type: Application
    Filed: June 29, 2016
    Publication date: October 20, 2016
    Inventors: Se-Jin CHO, Chang-Ho LEE, Dae-Yup SHIN, Young-Mok SON, Il-Soo OH, Hee-Joo KO, Jin-Young YUN, Bo-Ra LEE, Yeon-Woo LEE, Beom-Joon KIM, Pyung-Eun JEON, Hyun-Ju CHOI, Chang-Min LEE
  • Patent number: 9416107
    Abstract: A heterocyclic compound represented by Formula 1 below and an organic light-emitting device including the same: wherein Formula 1 is defined as in the detailed description.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: August 16, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sun-Young Lee, Yoon-Hyun Kwak, Bum-Woo Park, Hee-Joo Ko, Jong-Hyuk Lee
  • Patent number: 9385336
    Abstract: Provided is an organic light-emitting device including a first electrode, a second electrode disposed opposite to the first electrode, an emission layer disposed between the first electrode and the second electrode, and an electron-transporting layer disposed between the emission layer and the second electrode. The electron-transporting layer includes a first electron-transporting material and a second electron-transporting material. The lowest unoccupied molecular orbital (LUMO) energy level of the first electron-transporting material (EL1) and the lowest unoccupied molecular orbital (LUMO) energy level of the second electron-transporting material (EL2) satisfy the equation 0.1 eV?|EL1?EL2|?0.3 eV.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: July 5, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se-Jin Cho, Chang-Ho Lee, Dae-Yup Shin, Young-Mok Son, Il-Soo Oh, Hee-Joo Ko, Jin-Young Yun, Bo-Ra Lee, Yeon-Woo Lee, Beom-Joon Kim, Pyung-Eun Jeon, Hyun-Ju Choi, Chang-Min Lee
  • Patent number: 9293736
    Abstract: An organic light emitting element includes a first electrode, a second electrode, and an organic layer. The organic layer includes a first emission layer between the first electrode and the second electrode, a second emission layer between the first emission layer and the second electrode, and an electron injection layer (EIL) between the first emission layer and the second emission layer, the electron injection layer (EIL) containing fullerene (C60).
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: March 22, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hee-Joo Ko, Se-Jin Cho, Bo-Ra Lee, Chang-Ho Lee, Il-Soo Oh, Hyung-Jun Song, Jin-Young Yun, Young-Woo Song, Jong-Hyuk Lee, Sung-Chul Kim
  • Patent number: 9293710
    Abstract: An organic light-emitting diode including a buffer layer including an amine-based compound.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: March 22, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Se-Jin Cho, Chang-Ho Lee, Dae-Yup Shin, Young-Mok Son, ll-Soo Oh, Hee-Joo Ko, Jin-Young Yun, Bo-Ra Lee, Seok-Hwan Hwang, Young-Kook Kim, Yoon-Hyun Kwak
  • Patent number: 9282612
    Abstract: A dual mode organic light emitting device and a pixel circuit including the same are disclosed. The dual mode organic light emitting device includes a cathode formed over a substrate, an electron transport layer (ETL) formed over the cathode, an emission layer formed over the electron transport layer (ETL), and an anode formed over the emission layer, wherein the cathode includes a first metal selected from silver (Ag), aluminum (Al), copper (Cu), and gold (Au) and a second metal having a work function of about 4.0 eV or less, and the first metal and the second metal are present at a weight ratio of about 1:1 to about 1:100.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: March 8, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Ra Lee, Chang-Ho Lee, Il-Soo Oh, Jin-Young Yun, Hee-Joo Ko, Se-Jin Cho, Hyung-Jun Song, Young-Woo Song, Jong-Hyuk Lee, Sung-Chul Kim
  • Patent number: 9219103
    Abstract: An organic light emitting diode display is disclosed. The display includes some pixel areas which are opaque and some pixel areas which are partially opaque and partially transparent. Selectively displaying the light emission of the pixel areas allows for control of the relative brightness of a displayed image and an object behind the display.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 22, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang-Ho Lee, Hee-Joo Ko, II-Soo Oh, Se-Jin Cho, Jin-Young Yun, Hyung-Jun Song, Young-Woo Song, Kyu-Hwan Hwang, Seok-Gyu Yoon, Jae-Heung Ha, Jong-Hyuk Lee
  • Patent number: 9178162
    Abstract: Embodiments of the present invention are directed to a compound represented by Formula 1, and to an organic light-emitting device including the compound.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: November 3, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang-Hyun Han, Seok-Hwan Hwang, Young-Kook Kim, Hye-Jin Jung, Jin-O Lim, Soo-Yon Kim, Eun-Jae Jeong, Jun-Ha Park, Eun-Young Lee, Hee-Joo Ko, Jong-Hyuk Lee
  • Patent number: 9178001
    Abstract: The present invention provides an organic light emitting diode comprising a substrate comprising a first sub-pixel, a second sub-pixel, and a third sub-pixel; a first electrode disposed on the substrate; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; and a first layer disposed between the first electrode and the second electrode and containing an ambipolar compound, and a method for manufacturing the organic light emitting diode.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: November 3, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yoon-Hyun Kwak, Sun-Young Lee, Bum-Woo Park, Chang-Ho Lee, Se-Jin Cho, Jong-Hyuk Lee, Hee-Joo Ko
  • Patent number: 9163004
    Abstract: A heterocyclic compound represented by Formula 1 below and an organic light-emitting device including the heterocyclic compound: wherein R1 through R9 are defined as in the specification.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: October 20, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yoon-Hyun Kwak, Seok-Hwan Hwang, Young-Kook Kim, Hye-Jin Jung, Jong-Hyuk Lee, Hee-Joo Ko
  • Patent number: 9159947
    Abstract: An organic light-emitting device, including a first electrode, the first electrode having a smaller absolute value of a work function energy level than an absolute value of a work function energy level of ITO, a second electrode facing the first electrode, and an organic layer between the first electrode and the second electrode.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: October 13, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hee-Joo Ko, Chang-Ho Lee, Il-Soo Oh, Se-Jin Cho, Hyung-Jun Song, Jin-Young Yun, Jong-Hyuk Lee
  • Patent number: 9105860
    Abstract: A full color organic light emitting diode having high efficiency and high color purity while having low manufacturing costs due to simple manufacturing processes.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: August 11, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seok-Hwan Hwang, Young-Kook Kim, Hye-Jin Jung, Jin-O Lim, Sang-Hyun Han, Hee-Joo Ko, Jong-Hyuk Lee, Chang-Ho Lee
  • Patent number: 9070645
    Abstract: An organic light emitting diode (OLED) display including a substrate main body; a thin film transistor on the substrate main body; and an organic light emitting diode including a transparent electrode connected with the thin film transistor and being capable of injecting electrons, an organic emission layer on the transparent electrode, and a reflective electrode on the organic emission layer and being capable of injecting holes, wherein the organic emission layer includes an electron injection unit on the transparent electrode, the electron injection unit including an electron injection metal layer, an electron injection layer, and an electron injection dipole layer, and a light emitting unit on the electron injection unit.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: June 30, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hee-Joo Ko, Chang-Ho Lee, Il Soo Oh, Se-Jin Cho, Hyung-Jun Song, Jin-Young Yun, Jong-Hyuk Lee
  • Patent number: 9051328
    Abstract: Embodiments of the present invention are directed to heterocyclic compounds and organic light-emitting devices including the heterocyclic compounds. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltages, high luminance and long lifespans.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: June 9, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young-Kook Kim, Seok-Hwan Hwang, Yoon-Hyun Kwak, Hye-Jin Jung, Jong-Hyuk Lee, Jin-O Lim, Hee-Joo Ko
  • Patent number: 9006762
    Abstract: An organic light-emitting device including a substrate, an anode layer on the substrate, the anode layer including WOxNy (2.2?x?2.6 and 0.22?y?0.26), an emission structure layer on the anode layer, and a cathode layer on the emission structure layer.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: April 14, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang-Ho Lee, Hee-Joo Ko, Il-Soo Oh, Hyung-Jun Song, Se-Jin Cho, Jin-Young Yun, Bo-Ra Lee, Young-Woo Song, Jong-Hyuk Lee, Sung-Chul Kim