Patents by Inventor Joon-Chul Goh

Joon-Chul Goh 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: 20210183298
    Abstract: A display apparatus includes a display panel and a timing controller. The timing controller generates first output image data based on input image data and sets a driving frequency of the display panel as a first frequency in a first operation mode. The timing controller converts the input image data into second output image data and sets the driving frequency of the display panel as a second frequency lower than the first frequency in a second operation mode. The display panel displays a first image based on the first frequency and the first output image data in the first operation mode. The first image is represented by X grayscales. The display panel displays a second image based on the second frequency and the second output image data in the second operation mode. The second image is represented by Y grayscales, where Y is less than X.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 17, 2021
    Inventors: Mun-San Park, Joon-Chul Goh, Woo-Mi Bae, Kyoung-Won Lee
  • Patent number: 10977998
    Abstract: A pixel circuit includes a main-circuit that controls an organic light-emitting element by controlling a driving current to flow into the organic light-emitting element and a sub-circuit including a first compensation transistor including a gate terminal which receives a first gate signal, a second compensation transistor including a gate terminal which receives a second gate signal, and an initialization transistor including a gate terminal which receives an initialization signal. Here, in a low-frequency driving mode, a driving frequency of the first gate signal is N hertz (Hz), a driving frequency of the initialization signal is N Hz, a driving frequency of the second gate signal is M Hz, the first compensation transistor and the initialization transistor are turned on during a first time duration in N non-light-emitting periods per second, and the second compensation transistor is turned on during a second time duration in M non-light-emitting periods per second.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: April 13, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyo Jin Lee, Joon-Chul Goh, Sangan Kwon, Hui Nam, Jin Young Roh, Sehyuk Park
  • Patent number: 10964250
    Abstract: A display apparatus includes a display panel and a timing controller. The timing controller generates first output image data based on input image data and sets a driving frequency of the display panel as a first frequency in a first operation mode. The timing controller converts the input image data into second output image data and sets the driving frequency of the display panel as a second frequency lower than the first frequency in a second operation mode. The display panel displays a first image based on the first frequency and the first output image data in the first operation mode. The first image is represented by X grayscales. The display panel displays a second image based on the second frequency and the second output image data in the second operation mode. The second image is represented by Y grayscales, where Y is less than X.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: March 30, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Mun-San Park, Joon-Chul Goh, Woo-Mi Bae, Kyoung-Won Lee
  • Publication number: 20210074216
    Abstract: A display apparatus includes a display panel, a data driver, and a power voltage generator. The display panel includes a plurality of pixels and configured to display an image. The data driver is configured to apply a data voltage to the display panel. The power voltage generator is configured to provide a power voltage and an initialization voltage to the display panel. The power voltage generator is configured to receive a feedback initialization voltage from the display panel and configured to compensate the initialization voltage based on the feedback initialization voltage.
    Type: Application
    Filed: July 13, 2020
    Publication date: March 11, 2021
    Inventors: Wontae KIM, Bong-Hyun YOU, Sun-Koo KANG, Joon Chul GOH, Soon-Dong KIM, Jin-Wook YANG, Ki Hong SONG
  • Publication number: 20210074217
    Abstract: A pixel includes: a storage capacitor connected between a first power supply voltage and a gate node; a first transistor including a gate electrode connected to the gate node; a second transistor to transfer a data signal to a source of the first transistor in response to a scan signal; a third transistor to diode-connect the first transistor in response to the scan signal, and including first and second sub-transistors serially connected between the gate node and a drain of the first transistor; a fourth transistor to transfer an initialization voltage to the gate node in response to an initialization signal, and including third and fourth sub-transistors serially connected between the gate node and the initialization voltage; and an organic light emitting diode including a cathode connected to a second power supply voltage. At least one of the second and fourth sub-transistors includes a bottom electrode.
    Type: Application
    Filed: August 8, 2020
    Publication date: March 11, 2021
    Inventors: Hyo Jin LEE, Joon-Chul GOH, Sangan KWON, Hong Soo KIM, Hui NAM, Jin Young ROH, Sehyuk PARK
  • Publication number: 20210056895
    Abstract: A pixel circuit includes a main-circuit that controls an organic light-emitting element by controlling a driving current to flow into the organic light-emitting element and a sub-circuit including a first compensation transistor including a gate terminal which receives a first gate signal, a second compensation transistor including a gate terminal which receives a second gate signal, and an initialization transistor including a gate terminal which receives an initialization signal. Here, in a low-frequency driving mode, a driving frequency of the first gate signal is N hertz (Hz), a driving frequency of the initialization signal is N Hz, a driving frequency of the second gate signal is M Hz, the first compensation transistor and the initialization transistor are turned on during a first time duration in N non-light-emitting periods per second, and the second compensation transistor is turned on during a second time duration in M non-light-emitting periods per second.
    Type: Application
    Filed: July 30, 2020
    Publication date: February 25, 2021
    Inventors: Hyo Jin LEE, Joon-Chul GOH, Sangan KWON, Hui NAM, Jin Young ROH, Sehyuk PARK
  • Publication number: 20210049959
    Abstract: A pixel circuit includes: a main circuit including: a driving transistor that includes a gate terminal connected to a first node, a first terminal connected to a second node, and a second terminal connected to a third node; and an organic light-emitting element connected to the driving transistor and configured to control the organic light-emitting element by controlling a driving current corresponding to a data signal applied via a data line to flow into the organic light-emitting element; and a sub circuit including: a first compensation transistor that includes a gate terminal configured to receive a first gate signal, a first terminal connected to the first node, and a second terminal connected to a fourth node; and a second compensation transistor that includes a gate terminal configured to receive a second gate signal, a first terminal connected to the fourth node, and a second terminal connected to the third node.
    Type: Application
    Filed: July 17, 2020
    Publication date: February 18, 2021
    Inventors: Sehyuk PARK, Joon-Chul GOH, Sangan KWON, Jinyoung ROH, Hyojin LEE
  • Publication number: 20210049965
    Abstract: A display device includes: a plurality of pixels, where each of the pixels includes a light emitting device and a pixel circuit coupled to the light emitting device; a scan driver which supplies a scan signal to the pixel circuit; a data driver which supplies a data signal to the pixel circuit; a power supply which supplies a voltage to the pixel circuit; a timing controller which controls the scan driver; a first signal generator which provides a first clock signal to the timing controller; and a second signal generator which provides a second clock signal to the timing controller.
    Type: Application
    Filed: July 30, 2020
    Publication date: February 18, 2021
    Inventors: Jae Hyeon JEON, Joon Chul GOH, Jin Wook YANG, Ki Hong SONG
  • Publication number: 20210027720
    Abstract: A display device includes a display panel including a first partial panel region and a second partial panel region, and a panel driver configured to drive the display panel. The panel driver determines a first driving frequency for the first partial panel region and a second driving frequency for the second partial panel region. When the first driving frequency and the second driving frequency are different from each other, the panel driver sets a boundary portion including a boundary between the first partial panel region and the second partial panel region, and determines a third driving frequency for the boundary portion to be between the first driving frequency and the second driving frequency.
    Type: Application
    Filed: July 7, 2020
    Publication date: January 28, 2021
    Inventors: Sehyuk PARK, Joon-Chul GOH, Sangan KWON, HongSoo KIM, Hui NAM, Jinyoung ROH, Hyojin LEE
  • Patent number: 10896655
    Abstract: A display device includes a memory, a signal controller, and a voltage generator. A plurality of data is stored in the memory. The signal controller detects a frame rate of an externally applied image data signal, selects data corresponding to the detected frame rate among the plurality of data, and outputs a control signal corresponding to the selected data. The voltage generator includes a DC-DC converter for determining an output voltage in correspondence to the control signal and a feedback circuit for determining a current flowing inside and a frequency of an outputted signal in correspondence to the control signal.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: January 19, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dongin Kim, Jinkyu Park, Joon-chul Goh
  • Patent number: 10664427
    Abstract: A display device includes a first connector which receives a first image signal and first driving power, a second connector which receives a second image signal and second driving power, a first control unit which processes the first image signal and the first driving power, a second control unit which processes the second image signal and the second driving power, a power management unit which receives the first and second driving powers from the first control unit and the second control unit, measures the first and second driving powers, and provides information about the first driving power and information about the second driving power to the first and second control units, and a display unit which receives one of the first and second image signals from one of the first and second control units and displays one of the first and second image signals.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: May 26, 2020
    Assignee: SAMSUNG Display CO. LTD.
    Inventors: Jin Kyu Park, Kyung Uk Choi, Joon Chul Goh
  • Patent number: 10488684
    Abstract: A display apparatus includes a display panel and a display panel driver. The display panel includes a lower substrate and an upper substrate facing the lower substrate. The lower substrate includes a first base substrate and a flexible substrate. The flexible substrate has an area larger than an area of the first base substrate. The display panel driver includes a gate driver configured to apply a gate signal to a gate line of the display panel and a data driver configured to apply a data voltage to a data line of the display panel.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: November 26, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: A-Ram Song, Joon-Chul Goh, Soo-Yeon Lee
  • Patent number: 10460640
    Abstract: A display apparatus may include a display timing controller and a display panel. The display timing controller generates first output image data based on first input image data and a first gamma function, and generates second output image data based on second input image data and a second gamma function. The display panel operates based on the first output image data during a first duration, and operates based on the second output image data during a second duration subsequent to the first duration. The first and second gamma functions correspond to a first region of the display panel, and a luminance of an image based on the first gamma function is different from a luminance of an image based on the second gamma function.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: October 29, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Young-Soo Yoon, Joon-Chul Goh, Sang-Ik Lee
  • Patent number: 10438556
    Abstract: A display apparatus includes a timing controller, a data driver and a display panel. The timing controller receives input image data at a first frequency substantially equal to a frame rate of an input image. The timing controller generates a data signal having the first frequency based on the input image data having the first frequency. The data driver converts the data signal into a data voltage. The display panel displays an image based on the data voltage.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 8, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyoung-Won Lee, Su-Hyeong Park, Mun-San Park, Joon-Chul Goh, Woo-Mi Bae
  • Publication number: 20190294573
    Abstract: A display device includes a first connector which receives a first image signal and first driving power, a second connector which receives a second image signal and second driving power, a first control unit which processes the first image signal and the first driving power, a second control unit which processes the second image signal and the second driving power, a power management unit which receives the first and second driving powers from the first control unit and the second control unit, measures the first and second driving powers, and provides information about the first driving power and information about the second driving power to the first and second control units, and a display unit which receives one of the first and second image signals from one of the first and second control units and displays one of the first and second image signals.
    Type: Application
    Filed: June 11, 2019
    Publication date: September 26, 2019
    Inventors: Jin Kyu PARK, Kyung Uk CHOI, Joon Chul GOH
  • Patent number: 10417984
    Abstract: A method of driving a display panel is disclosed. In one aspect, the display panel includes a plurality of pixels arranged in odd and even rows and a plurality of odd and even gate lines respectively connected to the pixels of the corresponding odd and even rows. The method includes outputting odd gate signals to the odd numbered gate lines during two consecutive subframes and outputting even gate signals to the even numbered gate lines during two consecutive subframes. A frame is divided into two subframes.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: September 17, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung-Won Kim, Joon-Chul Goh, Hong-Soo Kim
  • Publication number: 20190279551
    Abstract: A display apparatus includes a display panel and a timing controller The timing controller generates first output image data based on input image data and sets a driving frequency of the display panel as a first frequency in a first operation mode. The timing controller converts the input image data into second output image data and sets the driving frequency of the display panel as a second frequency lower than the first frequency in a second operation mode. The display panel displays a first image based on the first frequency and the first output image data in the first operation mode. The first image is represented by X grayscales. The display panel displays a second image based on the second frequency and the second output image data in the second operation mode. The second image is represented by Y grayscales, where Y is less than X.
    Type: Application
    Filed: May 23, 2019
    Publication date: September 12, 2019
    Inventors: MUN-SAN PARK, Joon-Chul Goh, Woo-Mi Bae, Kyoung-Won Lee
  • Patent number: 10388242
    Abstract: A display apparatus includes a display panel and a first gate driver. The display panel includes a plurality of data lines extending in a first direction, and a plurality of gate lines extending in a second direction obliquely inclined toward the first direction and spaced apart from each other in a third direction crossing the second direction. The plurality of gate lines includes a first gate line group and a second gate line group respectively disposed in first and second display areas of the display panel. The first gate driver is configured to drive at least one gate line of the second gate line group while driving at least one gate line of the first gate line group.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: August 20, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jung-Taek Kim, Joon-Chul Goh, Sang-Ik Lee, Kyoung-Ho Lim
  • Patent number: 10360165
    Abstract: A display device includes a first connector which receives a first image signal and first driving power, a second connector which receives a second image signal and second driving power, a first control unit which processes the first image signal and the first driving power, a second control unit which processes the second image signal and the second driving power, a power management unit which receives the first and second driving powers from the first control unit and the second control unit, measures the first and second driving powers, and provides information about the first driving power and information about the second driving power to the first and second control units, and a display unit which receives one of the first and second image signals from one of the first and second control units and displays one of the first and second image signals.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: July 23, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin Kyu Park, Kyung Uk Choi, Joon Chul Goh
  • Patent number: 10360838
    Abstract: A display device includes an interface, a power supply, a switch arrangement, and a display. The interface is driven by driving power and receives image data from an external source. The power supply generates first and second power based on a first input power in a first mode and delivers the driving power to the interface in the first mode. The switch arrangement forms a first delivery path to deliver the first power from the power supply to the interface in the first mode The display receives the second power from the power supply when driven in the first mode and receives the image data from the interface. The switch arrangement forms a second delivery path to deliver second input power to the power supply in a second mode when the interface receives the second input power from the external source in the second mode.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: July 23, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyung-uk Choi, Seokyun Son, Joon-chul Goh, Kyungyul Kim, Seohyeong Yang