Patents by Inventor Ho Won Choi

Ho Won 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).

  • Patent number: 11587986
    Abstract: An organic light emitting display device includes: light emitting diodes respectively located in first to third sub-pixels on a substrate and respectively emitting red, green and blue color lights output upward through emission regions of the first to third sub-pixels; and a reflection structure located in a non-emission region surrounded by the first to third sub-pixels and including reflection side surfaces which are inclined and respectively face the emission regions of the first to third sub-pixels, wherein the reflection side surface reflects a light incident thereon from the corresponding emission region upward.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: February 21, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Jong-Sung Kim, Tae-Han Park, Ho-Won Choi, Dong-Young Kim
  • Patent number: 11018200
    Abstract: A display device including color filters overlapping each other on a non-emitting area of an upper substrate which is opposite to a lower substrate is provided. In the display device, color filters disposed close to a white emitting area include a same material, and the color filters extend a greater distance onto a non-emitting area disposed near the white emitting area, relative to distances extended onto other non-emitting areas. Thus, the display device may prevent light-leakage from the white emitting area.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: May 25, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Ho-Won Choi, Moon-Bae Gee
  • Publication number: 20210066406
    Abstract: An organic light emitting display device includes: light emitting diodes respectively located in first to third sub-pixels on a substrate and respectively emitting red, green and blue color lights output upward through emission regions of the first to third sub-pixels; and a reflection structure located in a non-emission region surrounded by the first to third sub-pixels and including reflection side surfaces which are inclined and respectively face the emission regions of the first to third sub-pixels, wherein the reflection side surface reflects a light incident thereon from the corresponding emission region upward.
    Type: Application
    Filed: August 24, 2020
    Publication date: March 4, 2021
    Inventors: Jong-Sung KIM, Tae-Han PARK, Ho-Won CHOI, Dong-Young KIM
  • Patent number: 10411077
    Abstract: A display device can include a lower substrate; a light-emitting structure including a lower electrode, a light-emitting layer, and an upper electrode, in which the lower electrode, the light-emitting layer and the upper electrode are sequentially stacked; a color filter disposed between the lower substrate and the light-emitting structure; and an over-coat layer surrounding a side surface of the color filter, in which an upper surface of the color filter facing the light-emitting structure is coplanar with an upper surface of the over-coat layer.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: September 10, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ho-Won Choi, Eui-Doo Do
  • Patent number: 10410576
    Abstract: A display device including two light-emitting structures on a single sub-pixel area is provided. In the display device, the two light-emitting structures are inclined toward the center of the corresponding sub-pixel area.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: September 10, 2019
    Assignee: LG Display Co., Ltd.
    Inventor: Ho-Won Choi
  • Patent number: 10388705
    Abstract: A display panel includes a substrate with a plurality of color sub pixel regions and a white sub pixel region constituting a unit pixel; a color filter layer with a color filter provided in each of the plurality of color sub pixel regions; and a reflection reduction layer provided in the white sub pixel region. The reflection reduction layer includes at least one color filter selected from the color filter layer, and a thickness of the reflection reduction layer is smaller than a thickness of the selected color filter.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: August 20, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Ho Won Choi, Hye Sook Kim
  • Patent number: 10388905
    Abstract: A display device includes an auxiliary electrode in order to prevent uneven brightness by the voltage drop. The display device further includes an under-cut region formed by stacked insulating layers. In the display device, the under-cut region is completely filled by filler due to changing a shape of the auxiliary electrode, so that the quality of the displaying image is improved. Also, in the display device, the contact area between an upper electrode of a light-emitting structure and the auxiliary electrode is increased, so that the reliability and the degree of integration are improved.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: August 20, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Ho-Won Choi, Hye-Sook Kim
  • Patent number: 10367039
    Abstract: A display device including emitting areas is provided. The emitting areas of the display device may realize a different color each other. The display device includes light-emitting structures on the emitting areas. The adjacent light-emitting structures have different heights with respect to the lower substrate, such that a size of a non-emitting area between the adjacent emitting areas is reduced.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: July 30, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Sung-Bin Shim, Ho-Won Choi, Eui-Doo Do, Moon-Bae Gee
  • Patent number: 10297792
    Abstract: A display device including a micro-cavity structure and a method for forming the same is provided. The display device includes light-emitting structures on pixel areas. In the display device, each of the pixel areas may realize a color different from an adjacent pixel area. In the display device, each of the light-emitting structures may include a reflective electrode, a resonant layer and a transparent electrode, which are sequentially stacked. In the display device, a side surface of the resonant layer and a side surface of the transparent electrode of the light-emitting structure may be surrounded by an interlayer insulating layer. Thus, in the display device, the reliability and the production efficiency may be improved.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: May 21, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: ChooJin Park, Ho-Won Choi, Eui-Doo Do, Sung-Bin Shim
  • Patent number: 10204966
    Abstract: An organic light-emitting display device that has a modified structure capable of preventing degradation of the aperture ratio and light leakage due to alignment tolerance between upper and lower substrates and a method of manufacturing the same are disclosed. The organic light-emitting display device includes a substrate including a plurality of sub-pixels, an insulation film disposed on the substrate and including recesses each having a bottom surface of a selected area and electrically isolating regions are positioned adjacent to a corresponding one of the recesses such that a pair comprising a recess and an isolation region corresponds to each of the sub-pixels. A first electrode is disposed on the bottom surface of each of the recesses in each of the sub-pixels.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: February 12, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Ho-Won Choi, Sung-Bin Shim, Moon-Bae Gee
  • Publication number: 20180190934
    Abstract: A display device includes an auxiliary electrode in order to prevent uneven brightness by the voltage drop. The display device further includes an under-cut region formed by stacked insulating layers. In the display device, the under-cut region is completely filled by filler due to changing a shape of the auxiliary electrode, so that the quality of the displaying image is improved. Also, in the display device, the contact area between an upper electrode of a light-emitting structure and the auxiliary electrode is increased, so that the reliability and the degree of integration are improved.
    Type: Application
    Filed: October 19, 2017
    Publication date: July 5, 2018
    Inventors: Ho-Won CHOI, Hye-Sook KIM
  • Publication number: 20180182815
    Abstract: A display device can include a lower substrate; a light-emitting structure including a lower electrode, a light-emitting layer, and an upper electrode, in which the lower electrode, the light-emitting layer and the upper electrode are sequentially stacked; a color filter disposed between the lower substrate and the light-emitting structure; and an over-coat layer surrounding a side surface of the color filter, in which an upper surface of the color filter facing the light-emitting structure is coplanar with an upper surface of the over-coat layer.
    Type: Application
    Filed: December 21, 2017
    Publication date: June 28, 2018
    Applicant: LG Display Co., Ltd.
    Inventors: Ho-Won CHOI, Eui-Doo DO
  • Publication number: 20180151108
    Abstract: A display device including two light-emitting structures on a single sub-pixel area is provided. In the display device, the two light-emitting structures are inclined toward the center of the corresponding sub-pixel area.
    Type: Application
    Filed: October 23, 2017
    Publication date: May 31, 2018
    Inventor: Ho-Won CHOI
  • Publication number: 20180122861
    Abstract: A display device including emitting areas is provided. The emitting areas of the display device may realize a different color each other. The display device includes light-emitting structures on the emitting areas. The adjacent light-emitting structures have different heights with respect to the lower substrate, such that a size of a non-emitting area between the adjacent emitting areas is reduced.
    Type: Application
    Filed: October 23, 2017
    Publication date: May 3, 2018
    Inventors: Sung-Bin SHIM, Ho-Won CHOI, Eui-Doo DO, Moon-Bae GEE
  • Publication number: 20180122862
    Abstract: A display device including color filters overlapping each other on a non-emitting area of an upper substrate which is opposite to a lower substrate is provided. In the display device, color filters disposed close to a white emitting area include a same material, and the color filters extend a greater distance onto a non-emitting area disposed near the white emitting area, relative to distances extended onto other non-emitting areas. Thus, the display device may prevent light-leakage from the white emitting area.
    Type: Application
    Filed: October 24, 2017
    Publication date: May 3, 2018
    Inventors: Ho-Won CHOI, Moon-Bae GEE
  • Publication number: 20180062116
    Abstract: A display device including a micro-cavity structure and a method for forming the same is provided. The display device includes light-emitting structures on pixel areas. In the display device, each of the pixel areas may realize a color different from an adjacent pixel area. In the display device, each of the light-emitting structures may include a reflective electrode, a resonant layer and a transparent electrode, which are sequentially stacked. In the display device, a side surface of the resonant layer and a side surface of the transparent electrode of the light-emitting structure may be surrounded by an interlayer insulating layer. Thus, in the display device, the reliability and the production efficiency may be improved.
    Type: Application
    Filed: August 29, 2017
    Publication date: March 1, 2018
    Inventors: ChooJin PARK, Ho-Won CHOI, Eui-Doo DO, Sung-Bin SHIM
  • Publication number: 20180061905
    Abstract: An organic light-emitting display device that has a modified structure capable of preventing degradation of the aperture ratio and light leakage due to alignment tolerance between upper and lower substrates and a method of manufacturing the same are disclosed. The organic light-emitting display device includes a substrate including a plurality of sub-pixels, an insulation film disposed on the substrate and including recesses each having a bottom surface of a selected area and electrically isolating regions are positioned adjacent to a corresponding one of the recesses such that a pair comprising a recess and an isolation region corresponds to each of the sub-pixels. A first electrode is disposed on the bottom surface of each of the recesses in each of the sub-pixels.
    Type: Application
    Filed: August 29, 2017
    Publication date: March 1, 2018
    Inventors: Ho-Won CHOI, Sung-Bin SHIM, Moon-Bae GEE
  • Patent number: 9547387
    Abstract: A method for manufacturing an organic light emitting display comprises forming a touch pad portion in a part of a dead region of the second buffer layer and the touch pad portion comprises a plurality of touch pads and each of the touch pads comprises a metal pad layer and a transparent electrode pad layer connected to each other via a plurality of first contact holes in a first insulating film.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: January 17, 2017
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ho-Won Choi, Seung-Hyun Kim
  • Publication number: 20160041670
    Abstract: A organic light emitting display includes a plurality of touch pads spaced from one another in the touch pad portion, each of the touch pads including a metal pad layer and a transparent electrode pad layer connected to the metal pad layer via a plurality of first contact holes in a first insulating film, a dummy pad portion formed in the dead region of the first buffer layer, the dummy pad portion comprising a plurality of dummy pads corresponding to the touch pads, and a sealant comprising a plurality of conductive balls between the touch pad portion and the dummy pad portion.
    Type: Application
    Filed: October 23, 2015
    Publication date: February 11, 2016
    Inventors: Ho-Won Choi, Seung-Hyun Kim
  • Publication number: 20150349029
    Abstract: A display panel includes a substrate with a plurality of color sub pixel regions and a white sub pixel region constituting a unit pixel; a color filter layer with a color filter provided in each of the plurality of color sub pixel regions; and a reflection reduction layer provided in the white sub pixel region. The reflection reduction layer includes at least one color filter selected from the color filter layer, and a thickness of the reflection reduction layer is smaller than a thickness of the selected color filter.
    Type: Application
    Filed: May 26, 2015
    Publication date: December 3, 2015
    Applicant: LG Display Co., Ltd.
    Inventors: Ho Won Choi, Hye Sook Kim