Patents by Inventor Won-Hoe Koo

Won-Hoe Koo 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: 10971558
    Abstract: Various embodiments provide an organic light emitting diode display device that includes a substrate having an emitting area and a non-emitting area; an overcoating layer on the substrate and including a convex portion and a concave portion. The convex portion includes a bottom surface portion, a top surface portion and a side surface portion between the bottom surface portion and the top surface portion. The organic light emitting diode further includes a first electrode on the overcoating layer; a light emitting layer on the first electrode; and a second electrode on the light emitting layer. The side surface portion is a main emission region having a first emission spectrum and the concave portion is an auxiliary emission region having a second emission spectrum different from the first emission spectrum. The main emission region and the auxiliary emission region are an effective emission region.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: April 6, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ji-Hyang Jang, Won-Hoe Koo, Tae-Shick Kim
  • Patent number: 10957877
    Abstract: An organic light emitting diode display device includes: a substrate including a plurality of pixel regions which each include an emission region and a non-emission region around the emission region; a plurality of scattering portions disposed on the substrate, corresponding to the emission region, and spaced apart from each other; a first overcoat layer disposed on the substrate having the plurality of scattering portions and including a plurality of concave portions which respectively correspond to the plurality of scattering portions; a first electrode disposed on the first overcoat layer in each of the plurality of pixel regions; and an organic light emitting layer and a second electrode sequentially disposed on the first electrode.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: March 23, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Ji-Hyang Jang, So-Young Jo, Won-Hoe Koo
  • Patent number: 10903455
    Abstract: Disclosed is a light emitting display device which facilitates to improve light-extraction efficiency of pixels, and to maximize light-extraction efficiency of each pixel, wherein the light emitting display device includes a substrate having a first area and a second area, a planarization coating layer prepared on the substrate and configured to have a first curve pattern prepared on the first area, and a second curve pattern prepared on the second area, and an emission device prepared on the first curve pattern and the second curve pattern, wherein a thickness of the planarization coating layer overlapping the first curve pattern is different from a thickness of the planarization coating layer overlapping the second curve pattern, and each of the first curve pattern and the second curve pattern includes a plurality of protruding portions having an aspect ratio of 0.4˜0.6.
    Type: Grant
    Filed: November 3, 2019
    Date of Patent: January 26, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Soo-Kang Kim, Won-Hoe Koo, Ji-Hyang Jang, So-Young Jo
  • Patent number: 10886350
    Abstract: An electroluminescent device includes a substrate which has a subpixel including a main subpixel and an auxiliary subpixel; a first thin film transistor and a second thin film transistor disposed on the substrate, the first thin film transistor corresponding to the main subpixel and the second thin film transistor corresponding to the auxiliary subpixel; an overcoat layer on the first and second thin film transistors; a first bottom electrode and a second bottom electrode on the overcoat layer, the first bottom electrode corresponding to the main subpixel and the second bottom electrode corresponding to the auxiliary subpixel; a light-emitting layer on the first bottom electrode and the second bottom electrode; and a top electrode on the light-emitting layer, wherein the main subpixel and the auxiliary subpixel have different color temperatures.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: January 5, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Ji-Hyang Jang, Won-Hoe Koo, Min-Geun Choi
  • Patent number: 10886432
    Abstract: A light emitting display device includes: a light emitting element that includes a light emitting layer between a first electrode and a second electrode; a wavelength conversion layer overlapping the light emitting element; and an uneven layer that includes a plurality of furrows between the light emitting element and the wavelength conversion layer, wherein a shortest distance between a bottom surface of the plurality of furrows and the wavelength conversion layer is 0.1 um or greater.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: January 5, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Soo-Kang Kim, Won-Hoe Koo, Ji-Hyang Jang, So-Young Jo
  • Publication number: 20200335728
    Abstract: The present disclosure relates to an organic light emitting diode display device including: a substrate having an emitting area and a non-emitting area; an insulating layer on the substrate, the insulating layer including a plurality of convex portions, a plurality of connecting portions and at least one wall in the emitting area, a height of the at least one wall is greater than a height of the plurality of convex portions; a first electrode on the substrate; an emitting layer on the first electrode; and a second electrode on the emitting layer, the first electrode, the emitting layer and the second electrode constituting a light emitting diode.
    Type: Application
    Filed: June 30, 2020
    Publication date: October 22, 2020
    Inventors: Hyun-Soo LIM, Kang-Ju LEE, Soo-Kang KIM, Won-Hoe KOO, Min-Geun CHOI
  • Publication number: 20200321557
    Abstract: An electroluminescent display device includes a thin film transistor disposed on a substrate; a passivation layer disposed on the thin film transistor; a plurality of metallic patterns disposed to be spaced apart from each other on the passivation layer; a reflective electrode disposed conforming to the shapes of the plurality of metallic patterns and a top surface of the passivation layer and including a plurality of protruding portions; an overcoat layer disposed on the passivation layer and the reflective electrode and including an opening configured to expose a top surface of each of the plurality of protruding portions; a first electrode disposed on the reflective electrode and the overcoat layer and electrically connected to the reflective electrode; an light-emitting layer disposed on the first electrode; and a second electrode disposed on the light-emitting layer.
    Type: Application
    Filed: June 18, 2020
    Publication date: October 8, 2020
    Inventors: Yong-Hoon CHOI, Won-Hoe KOO, Woo-Ram YOUN
  • Publication number: 20200303685
    Abstract: Provided are an organic light-emitting diode (OLED) and an organic light-emitting device including the same. The OLED includes a first electrode, an organic emissive layer which includes a plurality of convex curves or a plurality of concave curves in a light-emitting region and of which a slope of an inclined plane of an upper region with respect to a horizontal line dividing a height of the plurality of convex curves into halves is greater than a slope of an inclined plane of a lower region thereof, and a second electrode provided on the organic emissive layer. Accordingly, the OLED and the organic light-emitting device including the same are capable of improving current efficiency.
    Type: Application
    Filed: June 10, 2020
    Publication date: September 24, 2020
    Applicant: LG Display Co., Ltd.
    Inventors: Ji-Hyang JANG, So-Young JO, Won-Hoe KOO
  • Patent number: 10734611
    Abstract: The present disclosure relates to an organic light emitting diode display device including: a substrate having an emitting area and a non-emitting area; an insulating layer on the substrate, the insulating layer including a plurality of convex portions, a plurality of connecting portions and at least one wall in the emitting area, a height of the at least one wall is greater than a height of the plurality of convex portions; a first electrode on the substrate; an emitting layer on the first electrode; and a second electrode on the emitting layer, the first electrode, the emitting layer and the second electrode constituting a light emitting diode.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: August 4, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Hyun-Soo Lim, Kang-Ju Lee, Soo-Kang Kim, Won-Hoe Koo, Min-Geun Choi
  • Patent number: 10727447
    Abstract: An electroluminescent display device includes a thin film transistor disposed on a substrate; a passivation layer disposed on the thin film transistor; a plurality of metallic patterns disposed to be spaced apart from each other on the passivation layer; a reflective electrode disposed conforming to the shapes of the plurality of metallic patterns and a top surface of the passivation layer and including a plurality of protruding portions; an overcoat layer disposed on the passivation layer and the reflective electrode and including an opening configured to expose a top surface of each of the plurality of protruding portions; a first electrode disposed on the reflective electrode and the overcoat layer and electrically connected to the reflective electrode; an light-emitting layer disposed on the first electrode; and a second electrode disposed on the light-emitting layer.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: July 28, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Yong-Hoon Choi, Won-Hoe Koo, Woo-Ram Youn
  • Patent number: 10720597
    Abstract: An electroluminescent display device includes: a substrate including a subpixel; a thin film transistor disposed at the subpixel; an overcoat layer disposed on the thin film transistor; a first electrode disposed on the overcoat layer and electrically connected to the thin film transistor; a bank layer disposed on the overcoat layer and the first electrode, the bank layer including a plurality of openings configured to expose the first electrode and a plurality of opening patterns formed in a bar shape to expose the first electrode and connect the plurality of openings; an emitting layer disposed on the first electrode and the bank layer; and a second electrode disposed on the emitting layer.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: July 21, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Yong-Hoon Choi, Keum-Kyu Min, Won-Hoe Koo
  • Publication number: 20200227686
    Abstract: An OLED display device includes a first substrate including a plurality of sub-pixels each including an emission area and a non-emission area; organic light emitting diodes on the first substrate; a second substrate opposed to the first substrate; a black matrix and a color filter layer on one side of the second substrate; a spacer on the black matrix and overlapping or parallel to one of the plurality of the gate lines and the plurality of data lines; and a film layer on the spacer, wherein an air gap is provided between the second substrate and the film layer, and a part of the film layer is exposed by the air gap.
    Type: Application
    Filed: March 25, 2020
    Publication date: July 16, 2020
    Applicant: LG Display Co., Ltd.
    Inventors: Han-Sun PARK, Won-Hoe KOO, Ji-Hyang JANG
  • Patent number: 10714709
    Abstract: Provided are an organic light-emitting diode (OLED) and an organic light-emitting device including the same. The OLED includes a first electrode, an organic emissive layer which includes a plurality of convex curves or a plurality of concave curves in a light-emitting region and of which a slope of an inclined plane of an upper region with respect to a horizontal line dividing a height of the plurality of convex curves into halves is greater than a slope of an inclined plane of a lower region thereof, and a second electrode provided on the organic emissive layer. Accordingly, the OLED and the organic light-emitting device including the same are capable of improving current efficiency.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: July 14, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Ji-Hyang Jang, So-Young Jo, Won-Hoe Koo
  • Patent number: 10693108
    Abstract: A light extraction pattern is disposed in each hole of a first electrode, or a first electrode including round portions and pattern portions is disposed so that light trapped in an emission layer can be output uniformly. In this way, the light extraction efficiency can be effectively improved, and occurrence of a black area can be prevented.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: June 23, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Jin-Tae Kim, Won-Hoe Koo, Yong-Hoon Choi
  • Patent number: 10685939
    Abstract: A white LED module includes a circuit board, at least one first LED light source on the circuit board and emitting a first white light having a first color temperature, at least one second LED light source on the circuit board and emitting a second white light having a second color temperature, higher than the first color temperature, a wiring structure in the circuit board to selectively drive the at least one first LED light source and the at least one second LED light source, and a transparent encapsulant on the circuit board, to cover the at least one first LED light source and the at least one second LED light source. The transparent encapsulant includes a transparent resin and a light-scattering powder in the transparent resin.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: June 16, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae Sung You, Yun Tae Hwang, Ho Young Song, Won Hoe Koo, Jae Chul Kim, Ho Sun Paek
  • Patent number: 10658623
    Abstract: An electroluminescent display device includes an overcoat layer on a substrate; a plurality of low-refractive members formed of an inorganic matter and disposed on the overcoat layer; a first electrode on the overcoat layer and the plurality of low-refractive members; a bank layer disposed on the overcoat layer and the first electrode and including an opening configured to expose the first electrode; an emitting layer disposed on the first electrode; and a second electrode disposed on the emitting layer, wherein each of the plurality of low-refractive members includes a first flat surface contacting the first electrode, a second flat surface having an area greater than that of the first flat surface and contacting the overcoat layer and first and second inclined surfaces connecting the first flat surface and the second flat surface, and, wherein a refractive index of each of the plurality of low-refractive members is lower than those of the overcoat layer and the first electrode.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 19, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Yong-Hoon Choi, Won-Hoe Koo
  • Patent number: 10651426
    Abstract: An OLED display device includes a first substrate including a plurality of sub-pixels each including an emission area and a non-emission area; organic light emitting diodes on the first substrate; a second substrate opposed to the first substrate; a black matrix and a color filter layer on one side of the second substrate; a spacer on the black matrix and overlapping or parallel to one of the plurality of the gate lines and the plurality of data lines; and a film layer on the spacer, wherein an air gap is provided between the second substrate and the film layer, and a part of the film layer is exposed by the air gap.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: May 12, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Han-Sun Park, Won-Hoe Koo, Ji-Hyang Jang
  • Publication number: 20200083482
    Abstract: Disclosed is a light emitting display device which facilitates to improve light-extraction efficiency of pixels, and to maximize light-extraction efficiency of each pixel, wherein the light emitting display device includes a substrate having a first area and a second area, a planarization coating layer prepared on the substrate and configured to have a first curve pattern prepared on the first area, and a second curve pattern prepared on the second area, and an emission device prepared on the first curve pattern and the second curve pattern, wherein a thickness of the planarization coating layer overlapping the first curve pattern is different from a thickness of the planarization coating layer overlapping the second curve pattern, and each of the first curve pattern and the second curve pattern includes a plurality of protruding portions having an aspect ratio of 0.4˜0.6.
    Type: Application
    Filed: November 3, 2019
    Publication date: March 12, 2020
    Applicant: LG Display Co., Ltd.
    Inventors: Soo-Kang KIM, Won-Hoe KOO, Ji-Hyang JANG, So-Young JO
  • Publication number: 20200058708
    Abstract: Various embodiments provide an organic light emitting diode display device that includes a substrate having an emitting area and a non-emitting area; an overcoating layer on the substrate and including a convex portion and a concave portion. The convex portion includes a bottom surface portion, a top surface portion and a side surface portion between the bottom surface portion and the top surface portion. The organic light emitting diode further includes a first electrode on the overcoating layer; a light emitting layer on the first electrode; and a second electrode on the light emitting layer. The side surface portion is a main emission region having a first emission spectrum and the concave portion is an auxiliary emission region having a second emission spectrum different from the first emission spectrum. The main emission region and the auxiliary emission region are an effective emission region.
    Type: Application
    Filed: August 8, 2019
    Publication date: February 20, 2020
    Inventors: Ji-Hyang JANG, Won-Hoe KOO, Tae-Shick KIM
  • Publication number: 20200058721
    Abstract: The present disclosure is directed to an organic light emitting diode display device includes a substrate having an emitting area and a non-emitting area; an overcoating layer on a first surface of the substrate and including a plurality of convex portions and a plurality of concave portions, at least one of the plurality of convex portions including a bottom surface portion, a top surface portion and a side surface portion between the bottom and top surface portions; a light emitting diode on the overcoating layer; and a cholesteric liquid crystal layer at a transmission direction of a light emitted from the light emitting diode.
    Type: Application
    Filed: August 8, 2019
    Publication date: February 20, 2020
    Inventors: Dong-Min Sim, Won-Hoe Koo, Ji-Hyang Jang