Patents by Inventor Yongsik Kwak

Yongsik Kwak 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: 12008969
    Abstract: A backlight system includes a backlight and a master driving circuit. The backlight includes a plurality of slave driving circuits and a plurality of light sources driven by the plurality of slave driving circuits, wherein the plurality of slave driving circuits are arranged in a matrix of driving rows and driving columns such that first through m-th slave driving circuits, where m is a positive integer greater than one, are arranged in each driving row of the driving rows, and the first through m-th slave driving circuits are connected in a daisy chain structure. The master driving circuit is configured to generate a plurality of input data signals, wherein each input data signal of the plurality of input data signals corresponds to the each driving row, and the each input data signal includes first through m-th packets including luminance data corresponding to the first through m-th slave driving circuits.
    Type: Grant
    Filed: October 3, 2022
    Date of Patent: June 11, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kangjoo Kim, Sugyeung Kang, Yongsik Kwak, Yongil Kwon, Sunkwon Kim, Uijong Song, Sewoong Ahn
  • Publication number: 20240081087
    Abstract: A light-emitting device, a method of manufacturing the light-emitting device, and a method of operating the light-emitting device. The light-emitting device includes a first conductive layer comprising gold, an interlayer disposed on a surface of the first conductive layer, the interlayer comprises an inorganic salt, and a plurality of light-emitting group represented by Formula 1 chemically bonded to the surface of the first conductive layer. Formula 1 *—A3—(A1)m1—(A2)m2 A detailed description of Formula 1 is the same as described in this specification.
    Type: Application
    Filed: August 9, 2023
    Publication date: March 7, 2024
    Inventors: Joonghyuk KIM, Muhyun Baik, Eunji Lee, Seungyeon Kwak, Yongsik Jung, Hyejin Moon, Kyuyoung Hwang, Yerin Park, Changjin Oh, Joonghee Won, Hyeonho Choi
  • Patent number: 11900865
    Abstract: A light-emitting diode (LED) driving circuit for driving an LED channel including a plurality of LED elements includes a switch-capacitor amplifier circuit configured to sample received input current and amplify an input voltage corresponding to the input current, a replica circuit configured to connect to the switch-capacitor amplifier circuit in a first period to define a first feedback loop, and an output circuit configured to connect to the switch-capacitor amplifier in a second period to define a second feedback loop. The second period is after the first period, and the output circuit is configured to generate output current according to an output voltage of the switch-capacitor amplifier circuit and provide the output current to the LED.
    Type: Grant
    Filed: November 17, 2022
    Date of Patent: February 13, 2024
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yongsik Kwak, Sunkwon Kim, Yongil Kwon, Uijong Song, Moonsuk Jeong, Youngkil Choi
  • Publication number: 20230154391
    Abstract: A light-emitting diode (LED) driving circuit for driving an LED channel including a plurality of LED elements includes a switch-capacitor amplifier circuit configured to sample received input current and amplify an input voltage corresponding to the input current, a replica circuit configured to connect to the switch-capacitor amplifier circuit in a first period to define a first feedback loop, and an output circuit configured to connect to the switch-capacitor amplifier in a second period to define a second feedback loop. The second period is after the first period, and the output circuit is configured to generate output current according to an output voltage of the switch-capacitor amplifier circuit and provide the output current to the LED.
    Type: Application
    Filed: November 17, 2022
    Publication date: May 18, 2023
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Yongsik KWAK, Sunkwon KIM, Yongil KWON, Uijong SONG, Moonsuk JEONG, Youngkil CHOI
  • Publication number: 20230028210
    Abstract: A backlight system includes a backlight and a master driving circuit. The backlight includes a plurality of slave driving circuits and a plurality of light sources driven by the plurality of slave driving circuits, wherein the plurality of slave driving circuits are arranged in a matrix of driving rows and driving columns such that first through m-th slave driving circuits, where m is a positive integer greater than one, are arranged in each driving row of the driving rows, and the first through m-th slave driving circuits are connected in a daisy chain structure. The master driving circuit is configured to generate a plurality of input data signals, wherein each input data signal of the plurality of input data signals corresponds to the each driving row, and the each input data signal includes first through m-th packets including luminance data corresponding to the first through m-th slave driving circuits.
    Type: Application
    Filed: October 3, 2022
    Publication date: January 26, 2023
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kangjoo KIM, Sugyeung KANG, Yongsik KWAK, Yongil KWON, Sunkwon KIM, Uijong SONG, Sewoong AHN
  • Patent number: 11488548
    Abstract: A backlight system includes a backlight and a master driving circuit. The backlight includes a plurality of slave driving circuits and a plurality of light sources driven by the plurality of slave driving circuits, wherein the plurality of slave driving circuits are arranged in a matrix of driving rows and driving columns such that first through m-th slave driving circuits, where m is a positive integer greater than one, are arranged in each driving row of the driving rows, and the first through m-th slave driving circuits are connected in a daisy chain structure. The master driving circuit is configured to generate a plurality of input data signals, wherein each input data signal of the plurality of input data signals corresponds to the each driving row, and the each input data signal includes first through m-th packets including luminance data corresponding to the first through m-th slave driving circuits.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: November 1, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kangjoo Kim, Sugyeung Kang, Yongsik Kwak, Yongil Kwon, Sunkwon Kim, Uijong Song, Sewoong Ahn
  • Publication number: 20220114975
    Abstract: A backlight system includes a backlight and a master driving circuit. The backlight includes a plurality of slave driving circuits and a plurality of light sources driven by the plurality of slave driving circuits, wherein the plurality of slave driving circuits are arranged in a matrix of driving rows and driving columns such that first through m-th slave driving circuits, where m is a positive integer greater than one, are arranged in each driving row of the driving rows, and the first through m-th slave driving circuits are connected in a daisy chain structure.
    Type: Application
    Filed: July 12, 2021
    Publication date: April 14, 2022
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kangjoo KIM, Sugyeung Kang, Yongsik Kwak, Yongil Kwon, Sunkwon Kim, Uijong Song, Sewoong Ahn