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).

  • 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
  • Patent number: 10354165
    Abstract: An apparatus for detecting an afterimage candidate region includes: a comparison unit which compares gradation data of an n-th frame with integrated gradation data of an (n?1)-th frame and generates integrated gradation data of the n-th frame, where n is a natural number; a memory which provides the integrated gradation data of the (n?1)-th frame to the comparison unit and stores the integrated gradation data of the n-th frame; and an afterimage candidate region detection unit which detects an afterimage candidate region based on the integrated gradation data of the n-th frame, where each of the integrated gradation data of the n-th frame and the integrated gradation data of the (n?1)-th frame comprises a comparison region and a gradation region.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: July 16, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yong Jun Jang, Nam Gon Choi, Joon Chul Goh, Gi Geun Kim, Geun Jeong Park, Cheol Woo Park, Yun Ki Baek, Jeong Hun So, Dong Gyu Lee
  • Publication number: 20190213971
    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: Application
    Filed: January 7, 2019
    Publication date: July 11, 2019
    Inventors: Dongin Kim, Jinkyu Park, Joon-chul Goh
  • Patent number: 10339848
    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: January 12, 2016
    Date of Patent: July 2, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Mun-San Park, Joon-Chul Goh, Woo-Mi Bae, Kyoung-Won Lee
  • Patent number: 10319310
    Abstract: A display device includes: a display panel including first group pixels connected to a first gate line to receive first data voltages, and second group pixels connected to the first gate line to receive second data voltages; a backlight source to provide light to the display panel; a signal controller to divide horizontal image signals into first group image signals and second group image signals, to extract a first maximum grayscale image signal from the first group image signals, and to extract a second maximum grayscale image signal from the second group image signals; a power supply to generate first and second gamma driving voltages from a reference gamma driving voltage based on a grayscale level of the first maximum grayscale image signal and a grayscale level of the second maximum grayscale image signal.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: June 11, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung-taek Kim, Kyoungwon Lee, Joon-chul Goh, Youngwoo Choi
  • Publication number: 20190096314
    Abstract: A display apparatus includes: a display panel including a plurality of pixels respectively connected to a plurality of gate lines; a gate driving circuit including a plurality of driving stages configured to apply gate signals to the gate lines; a voltage generator configured to output a gate-on voltage through a voltage output terminal thereof; and a signal controller configured to sense a variation in current of the voltage output terminal to output a back bias control voltage corresponding to the sensed current variation, wherein each of the driving stages comprises a plurality of oxide thin film transistors and at least one of the oxide thin film transistors is a four-terminal transistor in which a threshold voltage thereof is controlled by the back bias control voltage.
    Type: Application
    Filed: November 30, 2018
    Publication date: March 28, 2019
    Inventors: Soo-wan Yoon, Joon-chul Goh, Young-Soo Yoon, Bonghyun You
  • Patent number: 10209803
    Abstract: There are provided a touch sensor and a liquid crystal display including the same. A touch sensor includes a plurality of driving electrodes, a plurality of sensing electrodes intersecting the driving electrodes, a plurality of piezoelectric materials disposed between the driving electrodes and the sensing electrodes at intersection points of the driving electrodes and the sensing electrodes, and a touch controller for detecting a touch position and a touch pressure by using sensing signals output from the sensing electrodes.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: February 19, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang Mi Kim, Joon Chul Goh, Kyoung Ho Lim
  • Patent number: 10152910
    Abstract: A display apparatus includes: a display panel including a plurality of pixels respectively connected to a plurality of gate lines; a gate driving circuit including a plurality of driving stages configured to apply gate signals to the gate lines; a voltage generator configured to output a gate-on voltage through a voltage output terminal thereof; and a signal controller configured to sense a variation in current of the voltage output terminal to output a back bias control voltage corresponding to the sensed current variation, wherein each of the driving stages comprises a plurality of oxide thin film transistors and at least one of the oxide thin film transistors is a four-terminal transistor in which a threshold voltage thereof is controlled by the back bias control voltage.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: December 11, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Soo-wan Yoon, Joon-chul Goh, Young-Soo Yoon, Bonghyun You
  • Publication number: 20180330689
    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: Application
    Filed: July 19, 2018
    Publication date: November 15, 2018
    Inventors: JUNG-TAEK KIM, Joon-Chul GOH, Sang-lk LEE, Kyoung-Ho LIM
  • Patent number: 10083647
    Abstract: A display apparatus includes a display panel comprising a data line, a gate line crossing the data line and a sub pixel connected to the data line and the gate line, a moving vector extractor configured to extract a moving vector of an input image using input data, a data generator configured to generate data of a high gamma curve called “high data” and data of a low gamma curve called “low data” corresponding to the input data using a spatiotemporal sequential pattern based on moving direction and moving speed of the moving vector, and a data driver circuit configured to covert the high data and the low data of the input data into a data voltage and provide the data line with the data voltage.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: September 25, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-Gyu Lee, Joon-Chul Goh, Sang-Ik Lee
  • Patent number: 10078011
    Abstract: A light sensitive circuit includes a light sensing capacitor and a driving transistor. The light sensing capacitor is configured to sense light of a predetermined one or more wavelengths. The driving transistor includes a gate electrode electrically connected to the light sensing capacitor and is configured to generate a light sensing current according to a voltage of the gate electrode in the driving transistor. A light sensing accuracy and a light sensing signal to noise ratio (SNR) of the display apparatus including a plurality of such light sensing capacitors may be improved relative to ones that do not include such light sensing capacitors.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: September 18, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joon-Chul Goh, Jae-Keun Lim
  • Patent number: 10074327
    Abstract: A display apparatus includes a mode determiner configured to compare image signals of a previous frame and a current frame and to determine an image mode of the current frame, a sync signal generator configured to generate a panel sync signal with a low frequency corresponding to the image mode using an original sync signal with a normal frequency, the low frequency being a non-divisor frequency of the normal frequency and lower than the normal frequency, a data driver configured to drive a data line of a display panel using a data sync signal based on the panel sync signal with the low frequency, and a gate driver configured to drive a gate line of the display panel using a gate sync signal based on the panel sync signal with the low frequency.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: September 11, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Myoung Seo, Dong-Won Park, Jae-Wan Park, Sang-Mi Kim, Yong-Doo Park, Kyoung-Won Lee, Joon-Chul Goh, Bonghyun You