Patents by Inventor Nack-Hyeon KEUM

Nack-Hyeon KEUM 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: 20230230546
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Application
    Filed: March 20, 2023
    Publication date: July 20, 2023
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
  • Patent number: 11610547
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: March 21, 2023
    Inventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
  • Publication number: 20230027500
    Abstract: A gate driver including a plurality of stages, each of the plurality of stages including an eighth transistor connected between a third power input terminal and an output terminal, the eighth transistor including a gate electrode connected to a fourth node, a seventh transistor connected between a second power input terminal and the output terminal, the seventh transistor including a gate electrode connected to a third node, an eleventh transistor connected between the third power input terminal and the fourth node, the eleventh transistor including a gate electrode connected to a first node, a twelfth transistor connected between the first node and the third node, the twelfth transistor including a gate electrode connected to the second power input terminal, and a third capacitor connected between the third power input terminal and the fourth node.
    Type: Application
    Filed: October 3, 2022
    Publication date: January 26, 2023
    Inventors: Tae Hoon KWON, Ji Hyun KA, Nack Hyeon KEUM, Jae Jin SONG, Kwang Sae LEE
  • Patent number: 11462173
    Abstract: A display device includes: a substrate including a display area and a non-display area; pixels connected to first scan lines, second scan lines, third scan lines, and emission control lines; a first scan driver supplying a first scan signal to the first scan lines; a second scan driver supplying a second scan signal to some of the second scan lines and supplying a third scan signal to the third scan lines; an emission driver supplying an emission control signal to the emission control lines; a first pad and a second pad provided in the non-display area; a first power line connected to the first pad, the first power line transferring a first voltage to the first scan driver and the emission driver; and a second power line connected to the second pad, the second power line transferring a second voltage to the second scan driver.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: October 4, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae Hoon Kwon, Ji Hyun Ka, Nack Hyeon Keum, Jae Jin Song, Kwang Sae Lee
  • Publication number: 20220020331
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Application
    Filed: September 30, 2021
    Publication date: January 20, 2022
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
  • Publication number: 20210375212
    Abstract: A display device includes: a substrate including a display area and a non-display area; pixels connected to first scan lines, second scan lines, third scan lines, and emission control lines; a first scan driver supplying a first scan signal to the first scan lines; a second scan driver supplying a second scan signal to some of the second scan lines and supplying a third scan signal to the third scan lines; an emission driver supplying an emission control signal to the emission control lines; a first pad and a second pad provided in the non-display area; a first power line connected to the first pad, the first power line transferring a first voltage to the first scan driver and the emission driver; and a second power line connected to the second pad, the second power line transferring a second voltage to the second scan driver.
    Type: Application
    Filed: January 11, 2021
    Publication date: December 2, 2021
    Inventors: Tae Hoon KWON, Ji Hyun KA, Nack Hyeon KEUM, Jae Jin SONG, Kwang Sae LEE
  • Patent number: 11164525
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: November 2, 2021
    Inventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
  • Publication number: 20200320936
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Application
    Filed: June 23, 2020
    Publication date: October 8, 2020
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
  • Patent number: 10733938
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: August 4, 2020
    Assignees: SAMSUNG DISPLAY CO., LTD., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
  • Patent number: 10733941
    Abstract: A pixel includes a first transistor connected between a line supplying a power supply voltage and a second node, and providing a driving current corresponding to a data voltage to a light emitting element based on a voltage of a first node, a third transistor connected between the first node and a line supplying a reference voltage, and generating a sampling current based on a difference between a voltage of the second node and the reference voltage, a second transistor connected between the line supplying the power supply voltage and the first node, adjusting the voltage of the first node to generate the sampling current based on a voltage of a third node, a fourth transistor transferring the power supply voltage to the third node, a fifth transistor transferring the data voltage to the second node, and a capacitor connected between the first node and the third node.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: August 4, 2020
    Assignees: SAMSUNG DISPLAY CO., LTD., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventors: Chongchul Chai, Ansu Lee, Boyong Chung, Oh-Kyong Kwon, Nack-Hyeon Keum
  • Patent number: 10700146
    Abstract: A pixel includes first through fourth transistors and storage capacitor. The first transistor controls an amount of current flowing from a first driving power source to a second driving power source, via an organic light-emitting diode, based on a voltage of a first node. The second transistor is coupled between a first electrode of the first transistor and the first node, and is turned on when a scan signal is supplied to a scan line. The third transistor is coupled between a second electrode of the first transistor and a reference power source, and is turned on when the scan signal is supplied. The fourth transistor is coupled between an anode electrode of the organic light-emitting diode and a data line, and is turned on when the scan signal is supplied. The storage capacitor is coupled between the first node and the anode electrode of the organic light-emitting diode.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: June 30, 2020
    Assignees: SAMSUNG DISPLAY CO., LTD., IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Chong Chul Chai, Oh Kyong Kwon, Nack Hyeon Keum, Kyong Hwan Oh, Bo Yong Chung, An Su Lee
  • Publication number: 20190251906
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG
  • Patent number: 10311793
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: June 4, 2019
    Assignees: SAMSUNG DISPLAY CO., LTD., INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventors: Chong-Chul Chai, Oh-Kyong Kwon, Nack-Hyeon Keum, Kyong-Hwan Oh, Young-Wan Seo, Yong-Koo Her, In-Jae Hwang
  • Publication number: 20190164501
    Abstract: A pixel includes a first transistor connected between a line supplying a power supply voltage and a second node, and providing a driving current corresponding to a data voltage to a light emitting element based on a voltage of a first node, a third transistor connected between the first node and a line supplying a reference voltage, and generating a sampling current based on a difference between a voltage of the second node and the reference voltage, a second transistor connected between the line supplying the power supply voltage and the first node, adjusting the voltage of the first node to generate the sampling current based on a voltage of a third node, a fourth transistor transferring the power supply voltage to the third node, a fifth transistor transferring the data voltage to the second node, and a capacitor connected between the first node and the third node.
    Type: Application
    Filed: October 22, 2018
    Publication date: May 30, 2019
    Inventors: Chongchul CHAI, Ansu LEE, Boyong CHUNG, Oh-Kyong KWON, Nack-Hyeon KEUM
  • Publication number: 20180166516
    Abstract: A pixel includes first through fourth transistors and storage capacitor. The first transistor controls an amount of current flowing from a first driving power source to a second driving power source, via an organic light-emitting diode, based on a voltage of a first node. The second transistor is coupled between a first electrode of the first transistor and the first node, and is turned on when a scan signal is supplied to a scan line. The third transistor is coupled between a second electrode of the first transistor and a reference power source, and is turned on when the scan signal is supplied. The fourth transistor is coupled between an anode electrode of the organic light-emitting diode and a data line, and is turned on when the scan signal is supplied. The storage capacitor is coupled between the first node and the anode electrode of the organic light-emitting diode.
    Type: Application
    Filed: December 12, 2017
    Publication date: June 14, 2018
    Inventors: Chong Chul CHAI, Oh Kyong KWON, Nack Hyeon KEUM, Kyong Hwan OH, Bo Yong CHUNG, An Su LEE
  • Publication number: 20170337872
    Abstract: A display apparatus includes a plurality of pixels. A pixel includes a first capacitor connected between a first voltage line receiving a first driving signal and a first node, a first transistor comprising a control electrode connected to the first node, a first electrode connected to a second voltage line receiving a first power source signal and a second electrode connected to a second node, an organic light emitting diode comprising an anode electrode connected to the second node and a cathode electrode receiving a second power source signal, a second capacitor connected between an m-th data line and the second node (wherein, ‘m’ is a natural number) and a second transistor comprising a control electrode connected to an n-th scan line (wherein, ‘n’ is a natural number), a first electrode connected to the first node and a second electrode connected to the second node.
    Type: Application
    Filed: January 6, 2017
    Publication date: November 23, 2017
    Inventors: Chong-Chul CHAI, Oh-Kyong KWON, Nack-Hyeon KEUM, Kyong-Hwan OH, Young-Wan SEO, Yong-Koo HER, In-Jae HWANG