Patents by Inventor Ji-Hyang JANG

Ji-Hyang JANG 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: 11107861
    Abstract: An organic light emitting diode display (OLED) is disclosed. The disclosed OLED includes a substrate including a plurality of sub-pixels, each sub-pixel comprising a display area and a non-display area surrounding the display area, the display area comprising a first display area at a center region of the display area and a second display area surrounding the first display area; a first electrode formed in the display area; an organic light emitting layer formed on the first electrode and extending to the non-display area; a third electrode formed on a portion of the organic light emitting layer in the first display area; and a second electrode formed on the third electrode and the organic light emitting layer, wherein the first and third electrodes are able to achieve a micro cavity effect.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: August 31, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Woo-Ram Youn, Ji-Hyang Jang
  • Patent number: 11108023
    Abstract: An organic light emitting diode display device includes a substrate, an overcoating layer on the substrate and including a plurality of convex portions and a plurality of concave portions, a first electrode on the overcoating layer, a light emitting layer on the first electrode and including a first emitting material layer, and a second electrode on the light emitting layer, wherein the first emitting material layer in the plurality of convex portions is separated from the second electrode by a first distance, and the first emitting material layer in the plurality of concave portions is separated from the second electrode by a second distance different from the first distance.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: August 31, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Dong-Min Sim, Ji-Hyang Jang, Jin-Tae Kim
  • Publication number: 20210217818
    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: March 9, 2021
    Publication date: July 15, 2021
    Inventors: Ji-Hyang JANG, Won-Hoe KOO, Tae-Shick KIM
  • Patent number: 11063244
    Abstract: An electroluminescent display device comprises a substrate; a thin film transistor disposed on the substrate; an overcoat layer disposed on the thin film transistor; and a light-emitting diode electrically connected to the thin film transistor through the overcoat layer, wherein the light-emitting diode includes a first electrode, a light-emitting layer on the first electrode and a second electrode on the light-emitting layer, and an emissive area is an area in which the light-emitting layer emits light by the first electrode or the second electrode, wherein the overcoat layer includes a micro lens at a position corresponding to the emissive area, and the light-emitting diode conforms to a morphology of the micro lens, and wherein the first electrode includes a first region and a second region, the first region comprises an electrode layer, and the second region includes the electrode layer and an electrode pattern disposed under the electrode layer.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: July 13, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: So-Young Jo, Ji-Hyang Jang, Min-Geun Choi, Woo-Ram Youn
  • Publication number: 20210175290
    Abstract: An organic light emitting diode display device includes a substrate having first, second, third and fourth subpixels; first, second and third color filter layers in the second, third and fourth subpixels, respectively, on the substrate; a first wavelength converting layer in the first subpixel on the substrate and second and third wavelength converting layers on the first and second color filter layers, respectively; and a light emitting diode in each of the first, second, third and fourth subpixels over the first, second and third wavelength converting.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 10, 2021
    Applicant: LG Display Co., Ltd.
    Inventors: Ji-Hyang JANG, Tae-Shick KIM, So-Young JO, Jin-Tae KIM
  • 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: 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
  • 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: 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: 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
  • 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: 20200006709
    Abstract: An organic light emitting diode display device includes a substrate, an overcoating layer on the substrate and including a plurality of convex portions and a plurality of concave portions, a first electrode on the overcoating layer, a light emitting layer on the first electrode and including a first emitting material layer, and a second electrode on the light emitting layer, wherein the first emitting material layer in the plurality of convex portions is separated from the second electrode by a first distance, and the first emitting material layer in the plurality of concave portions is separated from the second electrode by a second distance different from the first distance.
    Type: Application
    Filed: June 27, 2019
    Publication date: January 2, 2020
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Dong-Min SIM, Ji-Hyang JANG, Jin-Tae KIM
  • Patent number: 10522789
    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: June 29, 2018
    Date of Patent: December 31, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Soo-Kang Kim, Won-Hoe Koo, Ji-Hyang Jang, So-Young Jo
  • Patent number: 10522600
    Abstract: Disclosed is an organic light-emitting display device having a micro lens array (MLA) structure applied to a display panel in order to improve light extraction efficiency. In the organic light-emitting display device, an optical device, including a reactive mesogen (RM) and a dye, is provided between a polarizer and a quarter wave plate (QWP) to block light spreading to a viewing angle, thereby reducing a diffuse reflection component due to the application of the MLA structure.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: December 31, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Young-Wook Kim, Hyun-Jong Noh, Seong-Han Hwang, Chi-Myung Ahn, Won-Hoe Koo, Ji-Hyang Jang