Patents by Inventor Han-Jin Ahn

Han-Jin Ahn 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: 20230209992
    Abstract: An organic light emitting diode can include a reflective electrode, a transparent electrode facing the reflective electrode, a first emitting part including a first emitting material layer, and a second emitting part including a second emitting material layer. The first emitting material layer can be a fluorescent emitting layer comprising a fourth compound as a fluorescent dopant. The second emitting material layer can be a phosphorescent emitting layer comprising a first compound as a phosphorescent dopant. Preferably, a ratio of a second emission peak intensity of the phosphorescent dopant to the first emission peak intensity of the phosphorescent dopant in the second emitting material layer is 0.5 or less. An organic light emitting device can include the organic light emitting diode and can be used in a display device or a lighting device.
    Type: Application
    Filed: October 31, 2022
    Publication date: June 29, 2023
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Han-Jin AHN, Gyeong-Woo KIM, Ji-Seon JANG, Joon-Beom IM, Jun-Yun KIM
  • Publication number: 20230210001
    Abstract: An organic light emitting diode can include a reflective electrode, a transparent electrode facing the reflective electrode, and a first emitting part including a first blue emitting material layer and positioned between the reflective electrode and the transparent electrode, a second emitting part including a second blue emitting material layer and positioned between the first emitting part and the transparent electrode, and a charge generation layer positioned between the first and second emitting parts. The first blue emitting material layer includes a fluorescent compound, and the second blue emitting material layer includes a fluorescent compound and a phosphorescent compound. A difference between a second emission peak intensity of the fluorescent compound in the second blue emitting material layer and a second emission peak intensity of the fluorescent compound in the first blue emitting material layer is 0.1 or less.
    Type: Application
    Filed: December 2, 2022
    Publication date: June 29, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: Joon-Beom IM, In-Ae SHIN, Han-Jin AHN, Jun-Yun KIM
  • Publication number: 20230200228
    Abstract: An organic light emitting diode (OLED) is described, which comprises at least one emitting material (EML) disposed between two electrodes. The EML can comprise a first emitting material layer having a first compound and a second compound of phosphorescent material, and a second emitting material layer having a third compound with triplet-triplet-annihilation property and a fourth compound. Further, an organic light emitting device can comprise the OLED. With the luminous materials with adjusted excited singlet/triplet energy levels, the intensities of emission peaks and full-width at quarter maximum applied into the emitting material layer, the driving voltage of the OLED can be reduced and the luminous efficiency, blue index and luminous lifespan of the OLED can be enhanced.
    Type: Application
    Filed: October 28, 2022
    Publication date: June 22, 2023
    Applicant: LG Display Co., Ltd.
    Inventors: Gyeong-Woo KIM, Joon-Beom IM, Han-Jin AHN, Jun-Yun KIM
  • Publication number: 20220209121
    Abstract: An organic light emitting diode includes a first electrode; a second electrode facing the first electrode; and a first emitting material layer including a first compound, a second compound and a third compound and positioned between the first and second electrodes, wherein an onset wavelength of the second compound is greater than an onset wavelength of the first compound and is smaller than an onset wavelength of the third compound, wherein a maximum emission wavelength of the second compound is smaller than a maximum emission wavelength of the first compound, and a maximum emission wavelength of the third compound is equal to or smaller than a maximum emission wavelength of the first compound, and wherein a full width at half maximum of each of the second and third compounds is smaller than a full width at half maximum of the first compound.
    Type: Application
    Filed: November 11, 2021
    Publication date: June 30, 2022
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Gyeong-Woo KIM, Ji-Seon JANG, Ik-Rang CHOE, Hye-Gun RYU, Han-Jin AHN, Jun-Yun KIM
  • Patent number: 10795207
    Abstract: An example of the present invention provides a quantum rod layer including: a photo-induced polymer including a base polymer aligned along a first direction and a photo-reactive group combined to the base polymer; and a quantum rod aligned along the first direction.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: October 6, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Seung-Ryull Park, Hyun-Jin Park, Han-Jin Ahn
  • Patent number: 10739644
    Abstract: A substrate for a liquid crystal display device includes: a substrate; and an alignment film on the substrate, the alignment film including an alignment material of a photo alignment material and a conductive particle.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: August 11, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Han-Jin Ahn, Dong-Jin Kim, Hyun-Sook Jeon
  • Patent number: 10705387
    Abstract: A substrate for a liquid crystal display device includes: a substrate; and an alignment film on the substrate, the alignment film including an alignment material of a photo alignment material and a conductive particle.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: July 7, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Han-Jin Ahn, Dong-Jin Kim, Hyun-Sook Jeon
  • Patent number: 10082705
    Abstract: Provided is a method of manufacturing new liquid crystal display device according to an embodiment of the present invention. Firstly, an alignment film is formed on a substrate. The alignment film is divided into a first alignment film formed using, as a precursor, liquid-state polyimide that contains a photodecomposition substance and a second alignment film formed using, as a precursor, a polyamic acid that does not contain a photodecomposition substance. UV light is irradiated to the alignment film, and decomposed substances formed by irradiation of the UV light is removed by an at least two-step removing process. By the method of manufacturing a liquid crystal display device according to the exemplary embodiment of the present disclosure, bright spots are minimized in pixels and a brightness of black is lowered, so that a liquid crystal display device with a high contrast ratio can be realized.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: September 25, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Patent number: 10073302
    Abstract: An alignment film for liquid crystal display device includes a first portion positioned towards to the liquid crystal layer and a second portion positioned away from the liquid crystal layer. The first portion provides improved anchoring force while the second portion exhibits a lower volume resistance than the first portion. Thus, AC image sticking and DC image sticking can be minimized at the same time.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: September 11, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Publication number: 20180173061
    Abstract: A substrate for a liquid crystal display device includes: a substrate; and an alignment film on the substrate, the alignment film including an alignment material of a photo alignment material and a conductive particle.
    Type: Application
    Filed: December 18, 2017
    Publication date: June 21, 2018
    Applicant: LG Display Co., Ltd.
    Inventors: Han-Jin AHN, Dong-Jin KIM, Hyun-Sook JEON
  • Publication number: 20180067365
    Abstract: Provided is a method of manufacturing new liquid crystal display device according to an embodiment of the present invention. Firstly, an alignment film is formed on a substrate. The alignment film is divided into a first alignment film formed using, as a precursor, liquid-state polyimide that contains a photodecomposition substance and a second alignment film formed using, as a precursor, a polyamic acid that does not contain a photodecomposition substance. UV light is irradiated to the alignment film, and decomposed substances formed by irradiation of the UV light is removed by an at least two-step removing process. By the method of manufacturing a liquid crystal display device according to the exemplary embodiment of the present disclosure, bright spots are minimized in pixels and a brightness of black is lowered, so that a liquid crystal display device with a high contrast ratio can be realized.
    Type: Application
    Filed: November 14, 2017
    Publication date: March 8, 2018
    Inventors: SeungRyull PARK, HyunJin PARK, JinPil KIM, Han Jin AHN, Hanseok LEE, Su-Bin LEE
  • Patent number: 9846332
    Abstract: Provided is a method of manufacturing new liquid crystal display device according to an embodiment of the present invention. Firstly, an alignment film is formed on a substrate. The alignment film is divided into a first alignment film formed using, as a precursor, liquid-state polyimide that contains a photodecomposition substance and a second alignment film formed using, as a precursor, a polyamic acid that does not contain a photodecomposition substance. UV light is irradiated to the alignment film, and decomposed substances formed by irradiation of the UV light is removed by an at least two-step removing process. By the method of manufacturing a liquid crystal display device according to the exemplary embodiment of the present disclosure, bright spots are minimized in pixels and a brightness of black is lowered, so that a liquid crystal display device with a high contrast ratio can be realized.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: December 19, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Publication number: 20170343864
    Abstract: An alignment film for liquid crystal display device includes a first portion positioned towards to the liquid crystal layer and a second portion positioned away from the liquid crystal layer. The first portion provides improved anchoring force while the second portion exhibits a lower volume resistance than the first portion. Thus, AC image sticking and DC image sticking can be minimized at the same time.
    Type: Application
    Filed: August 18, 2017
    Publication date: November 30, 2017
    Inventors: SeungRyull PARK, HyunJin PARK, JinPil KIM, Han Jin AHN, Hanseok LEE, Su-Bin LEE
  • Patent number: 9766501
    Abstract: An alignment film for liquid crystal display device includes a first portion positioned towards to the liquid crystal layer and a second portion positioned away from the liquid crystal layer. The first portion provides improved anchoring force while the second portion exhibits a lower volume resistance than the first portion. Thus, AC image sticking and DC image sticking can be minimized at the same time.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: September 19, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Publication number: 20170031211
    Abstract: An example of the present invention provides a quantum rod layer including: a photo-induced polymer including a base polymer aligned along a first direction and a photo-reactive group combined to the base polymer; and a quantum rod aligned along the first direction.
    Type: Application
    Filed: December 30, 2015
    Publication date: February 2, 2017
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Seung-Ryull Park, Hyun-Jin Park, Han-Jin Ahn
  • Patent number: 9046714
    Abstract: The present invention relates to a thin film transistor substrate and a method for fabricating the same, which can shorten a process time, prevent a scratch from taking place at an alignment film, and increase black luminance. The thin film transistor substrate includes a thin film transistor formed on a substrate, a protective film formed to flatten a step of the thin film transistor and have an uneven surface with repetitive projected patterns and recessed patterns, a pixel electrode formed on the protective film to maintain an uneven shape of the protective film, and an alignment film formed both on the protective film and the pixel electrode to maintain the uneven shapes of the protective film and the pixel electrode.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: June 2, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Han-Jin Ahn, Su-Hyun Park
  • Patent number: 8947622
    Abstract: Disclosed are an apparatus and method for fabricating an alignment layer for liquid crystal displays, capable of shortening process time, preventing scratches of alignment layers and decreasing black luminance. The method includes coating an alignment agent on a substrate, arranging a nano pattern mold with a groove and a protrusion to contact the alignment agent, pre-curing the alignment agent, separating the nano pattern mold from the alignment agent, and hard-curing the alignment agent separated from the nano pattern mold to form an alignment layer.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: February 3, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Han-Jin Ahn, Han-Shin Hwang
  • Publication number: 20140368775
    Abstract: An alignment film for liquid crystal display device includes a first portion positioned towards to the liquid crystal layer and a second portion positioned away from the liquid crystal layer. The first portion provides improved anchoring force while the second portion exhibits a lower volume resistance than the first portion. Thus, AC image sticking and DC image sticking can be minimized at the same time.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 18, 2014
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Publication number: 20140368779
    Abstract: Provided is a method of manufacturing new liquid crystal display device according to an embodiment of the present invention. Firstly, an alignment film is formed on a substrate. The alignment film is divided into a first alignment film formed using, as a precursor, liquid-state polyimide that contains a photodecomposition substance and a second alignment film formed using, as a precursor, a polyamic acid that does not contain a photodecomposition substance. UV light is irradiated to the alignment film, and decomposed substances formed by irradiation of the UV light is removed by an at least two-step removing process. By the method of manufacturing a liquid crystal display device according to the exemplary embodiment of the present disclosure, bright spots are minimized in pixels and a brightness of black is lowered, so that a liquid crystal display device with a high contrast ratio can be realized.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 18, 2014
    Inventors: SeungRyull Park, HyunJin Park, JinPil Kim, Han Jin Ahn, Hanseok Lee, Su-Bin Lee
  • Patent number: 8395739
    Abstract: An in-plane-switching mode liquid crystal display device is disclosed. The LCD device includes: first and second substrates opposite to each other; a liquid crystal layer interposed between the first and second substrates; a passivation film formed on the first substrate in which a thin film transistor is disposed; pixel and common electrodes arranged alternately with each other; and a first alignment film formed on the pixel and common electrodes. The liquid crystal layer and the passivation film are formed to have lower non-resistances than that of the first alignment film.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: March 12, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Han Shin Hwang, Joung Won Woo, Dong Guk Kim, Woo Keun Lee, Han Jin Ahn