Patents by Inventor Hyun Joon Choi

Hyun Joon 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: 12260046
    Abstract: A driving circuit includes: a display driver to generate a horizontal synchronization signal and a vertical synchronization signal according to a first clock signal of a first oscillator; a sensor driver to generate a touch signal according to a second clock signal of a second oscillator; and a determination circuit to detect a cycle of at least one of the horizontal synchronization signal or the vertical synchronization signal according to the second clock signal, and output a detection signal when the cycle is out of a range. The determination circuit is a part of the display driver or the sensor driver.
    Type: Grant
    Filed: June 26, 2023
    Date of Patent: March 25, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Young Ko, Tae Hyeon Yang, Han Su Cho, Tae Joon Kim, Hyun Wook Cho, Jae Woo Choi
  • Publication number: 20250086875
    Abstract: A dual energy technique based material decomposing method according to the present disclosure includes obtaining intensity change information between a radiographic image of a decomposition material phantom formed of a first material and a second material to be decomposed and a radiographic image of an equivalent material phantom formed of a first equivalent material and a second equivalent material corresponding to the first material and the second material, respectively, using a simulated radiographic imaging system, converting an image intensity of the equivalent material phantom using the intensity change information from a dual energy image, obtaining a material decomposition constant based on the dual energy image with a converted image intensity, and decomposing the first material and the second material from a dual energy image of an object including the first material and the second material using the material decomposition constant.
    Type: Application
    Filed: August 28, 2024
    Publication date: March 13, 2025
    Applicant: UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
    Inventors: Su Hwan LEE, Kyu Bom KIM, Kyuseok KIM, Hyun Joon CHOI, Yeonkyeong KIM
  • Publication number: 20250077034
    Abstract: A display device includes a plurality of touch cells, and a central area and an edge area. The plurality of touch cells is arranged in a first direction and a second direction crossing the first direction, and is located in the central area and the edge area. The edge area includes first to fourth sub-edge areas. Shapes of touch cells in the central area are different from shapes of touch cells in the edge area. Shapes of touch cells in the first and second sub-edge areas are different from shapes of touch cells in the third and fourth sub-edge areas.
    Type: Application
    Filed: April 17, 2024
    Publication date: March 6, 2025
    Inventors: Eung Kwan LEE, Tae Joon KIM, Ji Yeong LEE, Hyun Wook CHO, Jae Woo CHOI
  • Patent number: 12237364
    Abstract: A display device includes: a first sub-pixel having a first emission area and a first sub-area adjacent to each other in a first direction; and a bank extending around a portion of the first emission area and the first sub-area. The bank includes: a first wall extending around the first sub-area; and a second wall adjacent to the first emission area in a second direction crossing the first direction. The second wall and the first wall are spaced apart from each other in the first direction.
    Type: Grant
    Filed: May 18, 2022
    Date of Patent: February 25, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun Deok Im, Buem Joon Kim, Won Ho Lee, Hae Yun Choi
  • Patent number: 8669342
    Abstract: The invention provides a non-painting and high-gloss polycarbonate resin composition. Specifically, the invention provides a polycarbonate resin composition having a superior impact strength, heat-resistance, electric characteristics, weather resistance, and light resistance. In certain embodiments, the resin composition of the invention is obtained by mixing a butadiene-based impact modifier, such as acrylonitrile-butadiene-styrene (ABS) or methacrylate-butadiene-styrene and an acryl-based impact modifier in polycarbonate resin, followed by adding an ultraviolet (UV) absorbent to the mixture.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: March 11, 2014
    Assignees: Hyundai Motor Company, Kia Motors Corporation, LG Chem. Ltd.
    Inventors: Dae Sik Kim, Jung Gyun Noh, Kyeong Hoon Jang, Hyun Joon Choi, Yong Kim, Sung Tae Ahn, Min Han Kwak
  • Publication number: 20140045968
    Abstract: The invention provides a non-painting and high-gloss polycarbonate resin composition. Specifically, the invention provides a polycarbonate resin composition having a superior impact strength, heat-resistance, electric characteristics, weather resistance, and light resistance. In certain embodiments, the resin composition of the invention is obtained by mixing a butadiene-based impact modifier, such as acrylonitrile-butadiene-styrene (ABS) or methacrylate-butadiene-styrene and an acryl-based impact modifier in polycarbonate resin, followed by adding an ultraviolet (UV) absorbent to the mixture.
    Type: Application
    Filed: December 12, 2012
    Publication date: February 13, 2014
    Applicants: HYUNDAI MOTOR COMPANY, LG CHEM. LTD., KIA MOTORS CORPORATION
    Inventors: Dae Sik Kim, Jung Gyun Noh, Kyeong Hoon Jang, Hyun Joon Choi, Yong Kim, Sung Tae Ahn, Min Han Kwak