Patents by Inventor Hyung-Tak Jeon

Hyung-Tak Jeon 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: 11493847
    Abstract: The present invention relates to a structure for a quantum dot barrier rib and a process for preparing the same. The structure for a quantum dot barrier rib of the present invention comprises a cured film having a uniform film thickness and an appropriate range of film thickness. Here, the reflectance RSCI measured by the SCI (specular component included) method and the reflectance RSCE measured by the SCE (specular component excluded) method are reduced, and the ratio between them (RSCE/RSCI) is appropriately adjusted, so that it is possible to satisfy such characteristics as high light-shielding property and low reflectance at the same time while the resolution and pattern characteristics are maintained to be excellent. In addition, when the structure for a quantum dot barrier rib is prepared, it is possible to form a multilayer pattern having a uniform film thickness suitable for the quantum dot barrier ribs in a single development process. Thus, it can be advantageously used for a quantum dot display.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: November 8, 2022
    Inventors: Seung-Keun Kim, Hyung-Tak Jeon, Kyu Cheol Lee, Kyung-Jae Park, Seung-Kyu Song
  • Publication number: 20220206389
    Abstract: The structure for an optical device according to an embodiment comprises a protective layer formed from a photocurable siloxane resin composition, wherein the protective layer is capable of serving not only to protect or seal a light emitting element such as a mini-LED chip from external heat or moisture, but also to improve such optical characteristics as brightness and contrast ratio of light emitted from the light emitting element through the light diffusion effect.
    Type: Application
    Filed: December 13, 2021
    Publication date: June 30, 2022
    Inventors: Hyung-Tak JEON, Ji-Ung KIM, Seung-Kyu SONG, Geun HUH
  • Publication number: 20210191259
    Abstract: The colored photosensitive resin composition of the present invention comprises a multifunctional thiol compound and/or a compound containing a double bond and a hydroxyl group, whereby it can sufficiently form a cured film even at low temperatures. In addition, the photosensitive resin composition of the present invention has a fast development speed and excellent resolution and chemical resistance.
    Type: Application
    Filed: December 11, 2020
    Publication date: June 24, 2021
    Inventors: Hyung Tak Jeon, Kyu Cheol Lee, Seung-Keun Kim, Seung-Kyu Song
  • Publication number: 20200371436
    Abstract: The present invention relates to a structure for a quantum dot barrier rib and a process for preparing the same. The structure for a quantum dot barrier rib of the present invention comprises a cured film having a uniform film thickness and an appropriate range of film thickness. Here, the reflectance RSCI measured by the SCI (specular component included) method and the reflectance RSCE measured by the SCE (specular component excluded) method are reduced, and the ratio between them (RSCE/RSCI) is appropriately adjusted, so that it is possible to satisfy such characteristics as high light-shielding property and low reflectance at the same time while the resolution and pattern characteristics are maintained to be excellent. In addition, when the structure for a quantum dot barrier rib is prepared, it is possible to form a multilayer pattern having a uniform film thickness suitable for the quantum dot barrier ribs in a single development process. Thus, it can be advantageously used for a quantum dot display.
    Type: Application
    Filed: May 20, 2020
    Publication date: November 26, 2020
    Inventors: Seung-Keun KIM, Hyung-Tak JEON, Kyu Cheol LEE, Kyung-Jae PARK, Seung-Kyu SONG
  • Patent number: 10747109
    Abstract: The present invention relates to a colored photosensitive resin composition capable of forming a cured film that does not generate uneven wrinkles on its surface, to thereby minimize spots on the display screen that may be generated by a defect in the gap between the upper and lower plates during their assembly, with the formation of an excellent step difference and a pattern in a high resolution; and to a light shielding spacer produced therefrom and used for a liquid crystal display, an organic EL display, or the like.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: August 18, 2020
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Hyung-Tak Jeon, Ji Ung Kim, Kyung-Jae Park, Jong-Ho Na, Hyung Gu Kim
  • Patent number: 10747110
    Abstract: The present invention relates to a colored photosensitive resin composition that prevents the generation of uneven wrinkles when a cured film is formed, to thereby prevent spots that may be generated on the edges of a display upon the formation thereof, and has a short development time. Accordingly, the colored photosensitive resin composition can be advantageously used as a material for forming a protective film, an interlayer insulating film, a light shielding spacer such as a black column spacer, and the like to be employed in various electronic parts inclusive of a liquid crystal display (LCD) panel and an organic light emitting diode (OLED) display panel.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: August 18, 2020
    Assignee: Rohm and Haas Electronic Materials Korea Ltd
    Inventors: Ji Ung Kim, Hyung-Tak Jeon, Kyung-Jae Park, Jong-Ho Na, Hyung Gu Kim
  • Patent number: 10656520
    Abstract: Disclosed herein are a photosensitive resin composition and a cured film prepared therefrom. By comprising a copolymer (A) and a photopolymerizable compound (B) in specific amounts, a photosensitive resin composition may form a cured film having pattern developability with high resolution and good elasticity recovery rate. The composition may be effectively used for the formation of a cured film, particularly a spacer of a display device such as a liquid crystal display and an organic electroluminescence device.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: May 19, 2020
    Assignee: Rohm and Haas Electronic Materials Korea Ltd
    Inventors: Hyung-Tak Jeon, Seok-Bong Park, Gyung-Sik Choi
  • Patent number: 10534261
    Abstract: The present invention relates to a colored photosensitive resin composition capable of forming a cured film that does not generate uneven wrinkles on its surface at the time of its formation, and a light shielding spacer produced therefrom and used for a liquid crystal display, an organic EL display, or the like.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: January 14, 2020
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Hyung-Tak Jeon, Ji Ung Kim, Kyung-Jae Park, Jong-Ho Na, Hyung Gu Kim, Seok-Bong Park
  • Patent number: 10481493
    Abstract: The present invention relates to a colored photosensitive resin composition and to a light shielding spacer prepared therefrom. The colored photosensitive resin composition comprises an oxime ester fluorene-based compound as a photopolymerization initiator in a small amount, which is capable of forming a cured film that is excellent in terms of such properties as sensitivity, elastic recovery rate, resolution, chemical resistance, exudation resistance, voltage holding ratio, and the like. Accordingly, a light shielding spacer prepared therefrom can be advantageously used for a liquid crystal display, an organic EL display, and the like.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: November 19, 2019
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Kyung-Jae Park, Ji Ung Kim, Hyung-Tak Jeon
  • Publication number: 20180373144
    Abstract: Disclosed herein are a photosensitive resin composition and a cured film prepared therefrom. By comprising a copolymer (A) and a photopolymerizable compound (B) in specific amounts, a photosensitive resin composition may form a cured film having pattern developability with high resolution and good elasticity recovery rate. The composition may be effectively used for the formation of a cured film, particularly a spacer of a display device such as a liquid crystal display and an organic electroluminescence device.
    Type: Application
    Filed: September 30, 2016
    Publication date: December 27, 2018
    Inventors: Hyung-Tak Jeon, Seok-Bong Park, Gyung-Sik Choi
  • Publication number: 20180356723
    Abstract: The present invention relates to a colored photosensitive resin composition capable of forming a cured film that does not generate uneven wrinkles on its surface, to thereby minimize spots on the display screen that may be generated by a defect in the gap between the upper and lower plates during their assembly, with the formation of an excellent step difference and a pattern in a high resolution; and to a light shielding spacer produced therefrom and used for a liquid crystal display, an organic EL display, or the like.
    Type: Application
    Filed: May 31, 2018
    Publication date: December 13, 2018
    Applicant: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Hyung-Tak Jeon, Ji Ung Kim, Kyung-Jae Park, Jong-Ho Na, Hyung Gu Kim
  • Publication number: 20180356722
    Abstract: The present invention relates to a colored photosensitive resin composition and to a light shielding spacer produced therefrom. The colored photosensitive resin composition comprises epoxy groups and double bonds in a specific molar ratio and an oxime ester fluorene-based photopolymerization initiator in a smaller amount than a conventional oxime ester-based photopolymerization initiator, so that it has excellent photo-curing characteristics. As a result, it is possible to improve the high sensitivity characteristics such as resolution and step difference even with a small amount of light. Specifically, since the curing characteristics of the film surface is improved, it is to possible to reduce the generation of outgassing, which is a contamination source that may be generated when the film is dried. In addition, the colored photosensitive resin composition is capable of forming a cured film that minimizes the generation of uneven wrinkles on its surface.
    Type: Application
    Filed: May 31, 2018
    Publication date: December 13, 2018
    Inventors: Kyung-Jae Park, Hyung-Tak Jeon, Ji Ung Kim, Jong-Ho Na, Hyung Gu Kim
  • Publication number: 20180356728
    Abstract: The present invention relates to a colored photosensitive resin composition that prevents the generation of uneven wrinkles when a cured film is formed, to thereby prevent spots that may be generated on the edges of a display upon the formation thereof, and has a short development time. Accordingly, the colored photosensitive resin composition can be advantageously used as a material for forming a protective film, an interlayer insulating film, a light shielding spacer such as a black column spacer, and the like to be employed in various electronic parts inclusive of a liquid crystal display (LCD) panel and an organic light emitting diode (OLED) display panel.
    Type: Application
    Filed: May 29, 2018
    Publication date: December 13, 2018
    Inventors: Ji Ung Kim, Hyung-Tak Jeon, Kyung-Jae Park, Jong-Ho Na, Hyung Gu Kim
  • Publication number: 20180143533
    Abstract: The present invention relates to a colored photosensitive resin composition and to a light shielding spacer prepared therefrom. The colored photosensitive resin composition comprises an oxime ester fluorene-based compound as a photopolymerization initiator in a small amount, which is capable of forming a cured film that is excellent in terms of such properties as sensitivity, elastic recovery rate, resolution, chemical resistance, exudation resistance, voltage holding ratio, and the like. Accordingly, a light shielding spacer prepared therefrom can be advantageously used for a liquid crystal display, an organic EL display, and the like.
    Type: Application
    Filed: October 18, 2017
    Publication date: May 24, 2018
    Inventors: Kyung-Jae Park, Ji Ung Kim, Hyung-Tak Jeon
  • Publication number: 20180120699
    Abstract: The present invention relates to a colored photosensitive resin composition capable of forming a cured film that does not generate uneven wrinkles on its surface at the time of its formation, and a light shielding spacer produced therefrom and used for a liquid crystal display, an organic EL display, or the like.
    Type: Application
    Filed: October 12, 2017
    Publication date: May 3, 2018
    Inventors: Hyung-Tak Jeon, Ji Ung Kim, Kyung-Jae Park, Jong-Ho Na, Hyung Gu Kim, Seok-Bong Park