Patents by Inventor Dong-Kwon Choi

Dong-Kwon 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: 11949881
    Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: April 2, 2024
    Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong University
    Inventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim
  • Publication number: 20230231295
    Abstract: An electronic device is provided. An electronic device includes a radio frequency integrated circuit (RFIC) chip, and an antenna array electrically connected to the RFIC chip, the antenna array including a first face and a second face facing each other in a first direction, and a third face and a fourth face connecting the first and second faces to each other and facing each other in a second direction intersecting the first direction, the antenna array including a plurality of substrates sequentially stacked in a third direction intersecting a plane defined by the first and second directions, first and second antenna modules on the plurality of substrates and sequentially arranged along the first direction, a first metal partition-wall including at least one metal via extending through the plurality of substrates in the third direction, and a second metal partition-wall surrounding the first to fourth faces.
    Type: Application
    Filed: January 10, 2023
    Publication date: July 20, 2023
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Min Young Yoon, Young Ki Lee, Kyeol Kwon, Dong Kwon Choi, Doo Seok Choi, Joon Hoi Hur
  • Patent number: 10610881
    Abstract: The present invention relates to a slot die coating apparatus. A slot die coating apparatus according to an embodiment of the present invention includes: a slot die configured to perform a coating process by applying ink to a substrate; an image capturing unit disposed adjacent to the slot die and configured to capture a state of the slot die and a state of ink applied to the substrate during the coating process; and a control unit configured to compare an image captured by the image capturing unit with a reference image and control an operation of the slot die and a transfer of the substrate.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: April 7, 2020
    Assignee: SUNG AN MACHINERY CO., LTD.
    Inventors: Dong Kwon Choi, Ok Jin Kim, Dong Hoon Kim, Jang Hwan Lee, Young Min Lee, Young Jin Kim, Tae Su Chun
  • Publication number: 20180275071
    Abstract: The present invention relates to a slot die coating device and a control method therefor.
    Type: Application
    Filed: September 23, 2016
    Publication date: September 27, 2018
    Applicant: SUNG AN MACHINERY CO., LTD.
    Inventors: Dong Kwon CHOI, Ok Jin KIM, Young Min LEE, Young Jin KIM
  • Publication number: 20180117619
    Abstract: The present invention relates to a slot die coating apparatus. A slot die coating apparatus according to an embodiment of the present invention includes: a slot die configured to perform a coating process by applying ink to a substrate; an image capturing unit disposed adjacent to the slot die and configured to capture a state of the slot die and a state of ink applied to the substrate during the coating process; and a control unit configured to compare an image captured by the image capturing unit with a reference image and control an operation of the slot die and a transfer of the substrate.
    Type: Application
    Filed: April 15, 2016
    Publication date: May 3, 2018
    Inventors: Dong Kwon CHOI, Ok Jin KIM, Dong Hoon KIM, Jang Hwan LEE, Young Min LEE, Young Jin KIM, Tae Su CHUN
  • Patent number: 8820231
    Abstract: Disclosed is a roll-to-roll printing apparatus, which includes n support rollers arranged in an n-gonal shape (where n is an integer equal to or greater than 3), a looped pattern mask having a plurality of pattern sections passing through inner and outer surfaces thereof and disposed so as to interconnect the support rollers, a driver that rotates the pattern mask, a transfer unit having an unwinder and a rewinder of a printing target and a backup roller that is disposed between two of the support rollers adjacent to each other and outside the pattern mask and that supports the printing target transferred from the unwinder to the rewinder, a printing unit disposed inside the pattern mask and discharging ink toward the printing target supported on the backup roller, and a tension adjusting unit adjusting tension of the pattern mask.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: September 2, 2014
    Assignee: Sung An Machinery Co., Ltd.
    Inventor: Dong Kwon Choi
  • Publication number: 20130228083
    Abstract: Disclosed is a roll-to-roll printing apparatus, which includes n support rollers arranged in an n-gonal shape (where n is an integer equal to or greater than 3), a looped pattern mask having a plurality of pattern sections passing through inner and outer surfaces thereof and disposed so as to interconnect the support rollers, a driver that rotates the pattern mask, a transfer unit having an unwinder and a rewinder of a printing target and a backup roller that is disposed between two of the support rollers adjacent to each other and outside the pattern mask and that supports the printing target transferred from the unwinder to the rewinder, a printing unit disposed inside the pattern mask and discharging ink toward the printing target supported on the backup roller, and a tension adjusting unit adjusting tension of the pattern mask.
    Type: Application
    Filed: February 28, 2013
    Publication date: September 5, 2013
    Applicant: SUNG AN MACHINERY CO., LTD.
    Inventor: Dong Kwon Choi
  • Publication number: 20130025535
    Abstract: Provided is a slot die for improving coating uniformity including a main body, a cavity formed in the main body, an introduction part formed at an upper portion of the main body to supply a coating solution into the cavity, an injection unit configured to provide an external ejection path for the coating solution with respect to a portion of or the entire cavity, and a guide member arranged in the cavity to help diffusion of the coating solution to the injection unit. Accordingly, the guide member arranged in the cavity can induce diffusion of the ejected coating solution so that the coating solution can be more uniformly applied.
    Type: Application
    Filed: May 31, 2012
    Publication date: January 31, 2013
    Applicant: SUNG AN MACHINERY CO., LTD.
    Inventors: Dong Kwon Choi, Jang Hwan Lee, Dong Hoon Kim
  • Publication number: 20110100458
    Abstract: A multi-layer thin film for encapsulation and the method thereof are provided. The multi-layer thin film for encapsulation includes a protective layer composed of aluminum oxide, a single or double barrier layer composed of silicon nitride (SiNx), and a mechanical protective layer composed of silicon dioxide (SiO2). The multi-layer thin film can be economically fabricated by using the existing equipment, and has a high level of light transmission over 85% while showing a low level of oxygen and moisture penetration. Additionally, due to superior adhesive strength between the thin films, and high resistance against impacts by heat or ion during a fabricating process, reliability of fabrication is enhanced, and it can thus efficiently used in encapsulating an organic light-emitting device (OLED), a flexible organic light emitting device (FOLED) in a display field, and the cells such as a thin film battery and a solar cell.
    Type: Application
    Filed: October 1, 2010
    Publication date: May 5, 2011
    Applicant: KOREA INSTITUTE OF MACHINERY AND MATERIALS
    Inventors: Jae-Wook KANG, Do-Geun Kim, Dong Kwon Choi, Yong Soo Jeong, Jong Kuk Kim
  • Patent number: 7786955
    Abstract: A plasma display apparatus includes an image data transmitter to convert an externally input image signal into image data and to transmit the converted image data, an image data receiver to receive the image data and to restore an image signal from the image data, and a data driver to supply the restored image signal to an address electrode of the plasma display panel through a switching operation. The image data may be transmitted as a differential signal.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: August 31, 2010
    Assignee: LG Electronics Inc.
    Inventors: Jung Gwan Han, Yang Woog Ryu, Sonic Kim, Dong Kwon Choi
  • Patent number: 7633467
    Abstract: A plasma display apparatus and a driving method thereof are disclosed. The plasma display apparatus comprises a plasma display panel in which a plurality of electrodes are formed, an energy storage unit for storing energy applied to the electrodes, and a protector for maintaining a voltage level of the energy stored in the energy storage unit at a predetermined voltage range.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: December 15, 2009
    Assignee: LG Electronics Inc.
    Inventors: Janghwan Cho, Donghyuk Park, Changyoung Kwon, Dong Kwon Choi, Yang Ki An, Jinyoung Kim, Yunkwon Jung
  • Publication number: 20090145358
    Abstract: A deposition material supplying module includes a canister configured to define a storage space in which a deposition material is stored, a material flow controller provided with at least one groove receiving the deposition material supplied from the canister and adapted to rotate, and a carrier gas supplying unit configured to supply carrier gas to the material flow controller. The deposition material is filled in the groove and a fixed amount of the deposition material is supplied into the process chamber using the deposition material flow controller. Therefore, it is easy to control an amount of the deposition material supplied to the process chamber and the reliability on the fixed-quantity supply can be improved.
    Type: Application
    Filed: December 6, 2008
    Publication date: June 11, 2009
    Applicants: JUSUNG Engineering Co., Ltd, ADS
    Inventors: Kyoo Hwan Lee, Dong Kwon Choi, Chul Hwan Kim, Suk Ju Park, Hyung Sup Lee
  • Publication number: 20080136320
    Abstract: An organic electroluminescent (EL) element and a method of manufacturing the same are provided. The EL element comprises an organic light emitting layer, an electron transport layer, an electron injection layer, an electrode formed on an upper side of a substrate, and a buffer layer. The buffer layer is formed between the electron transport layer and the electron injection layer, or between the electron injection layer and the electrode by an atomic layer deposition process. Thus, interfacial properties of the electron injection layer and the electrode are improved. Accordingly, leakage current at a threshold voltage or less of the EL element is prevented, and an electric property of the EL element is improved.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 12, 2008
    Applicant: JUSUNG ENGINEERING CO., LTD.
    Inventor: Dong Kwon Choi
  • Patent number: 6379743
    Abstract: A process for preparing an organic electroluminescent device having a transparent substrate, a transparent electrode layer, a metallic electrode layer, and an organic interlayer containing an electronically active material dispersed in a matrix of polyimide, characterized in that the organic interlayer is prepared by depositing the vapors of a dianhydride, a diamine and the electronically active material to form a polyimide precursor layer containing the active material dispersed therein and thermally imidizing the polyimide precursor layer. The organic luminescent device thus obtained has improved luminous efficiency, thermal stability, interfacial surface roughness and high bulk density of the layer.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: April 30, 2002
    Assignee: NessDisplay, Co. Ltd.
    Inventors: Jae-Gyoung Lee, Youngkyoo Kim, Dong-Kwon Choi
  • Patent number: 6342637
    Abstract: A novel diamine compound of formula (I) of the present invention having a high glass transition temperature is useful as an improved hole transport agent, and an organic electroluminescent device containing the diamine compound of formula (I) has good thermal and mechanical stabilities, and prolonged lifetime.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: January 29, 2002
    Assignee: Nessdisplay Co., Ltd.
    Inventors: Ki-jong Han, Youngkoo Kim, Jae-Gyoung Lee, Dong-Kwon Choi
  • Patent number: 6337404
    Abstract: A novel diamine compound of formula (I) of the present invention having a high glass transition temperature is useful as an improved hole transport agent, and an organic electroluminescent device containing the diamine compound of formula (I) has good thermal and mechanical stabilities, and prolonged lifetime.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: January 8, 2002
    Assignee: Nessdisplay Co., Ltd.
    Inventors: Ki-jong Han, Youngkyoo Kim, Jae-Gyoung Lee, Dong-Kwon Choi