Patents by Inventor Do-Hyung Ryu

Do-Hyung Ryu 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: 11951722
    Abstract: A display device includes a display panel comprises a display area and a non-display area surrounding the display area; a cover panel disposed on a rear surface of the display panel and comprising a front surface, a first side surface connected to the front surface and bent along a first bending line, a second side surface connected to the front surface and bent along a second bending line intersecting the first bending line, and a first corner located between the first side surface and the second side surface; and an alignment notch defined at the first corner of the cover panel.
    Type: Grant
    Filed: May 12, 2021
    Date of Patent: April 9, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dae Hyun Hwang, Won Ju Kim, Do Hyung Ryu, Wu Hyeon Jung
  • Publication number: 20230009706
    Abstract: A apparatus for manufacturing a display device includes: a stage for supporting a display module including a display panel, a cover window, and a flexible printed circuit board; and an adsorption unit disposed at one side of the stage, the adsorption unit configured to be moved in a horizontal direction such that a distance between the stage and the adsorption unit is adjusted, wherein the adsorption unit is configured to adsorb and support the flexible printed circuit board connected to the display panel.
    Type: Application
    Filed: April 27, 2022
    Publication date: January 12, 2023
    Inventors: Dae Hyun HWANG, Do Hyung Ryu, Wu Hyeon Jung, Yong Seong Jang
  • Patent number: 11433657
    Abstract: A method of peeling off the protective film includes: providing a panel lower sheet, where a protective film is provided on one surface of the plane lower sheet and the protective film has a bending line extending in a first direction parallel to opposing sides thereof; gripping a portion of the protective film; moving the gripped portion of the protective film in a second direction which is a thickness direction thereof; and moving the panel lower sheet in a third direction perpendicular to the bending line.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: September 6, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Wu Hyeon Jung, Do Hyung Ryu, Dae Yang Bak, Dae Hyun Hwang
  • Publication number: 20220072842
    Abstract: An apparatus for attaching a display panel includes a panel mount which receives a panel bottom cover facing corner portions of the display panel which are extended bent from a front surface of the display panel, and a pressing module which provides a pressing force to the panel bottom cover which is received in the panel mount and faces the corner portions of the display panel. The pressing module includes a pressing pad which applies the pressing force to the panel bottom cover at the corner portions of the display panel to attach the panel bottom cover to the display panel at the corner portions thereof.
    Type: Application
    Filed: May 10, 2021
    Publication date: March 10, 2022
    Inventors: Dae Hyun HWANG, Do Hyung RYU, Hyun Sang PARK, Wu Hyeon JUNG
  • Publication number: 20220063233
    Abstract: A display device includes a display panel that is bent so that at least a portion of the display panel overlaps another portion of the display panel; and a spacer surrounded by the display panel and that includes a flat portion and a bent portion connected to the flat portion, where an upper surface of the bent portion has a first curvature and a lower surface of the bent portion has a second curvature that differs from the first curvature.
    Type: Application
    Filed: May 9, 2021
    Publication date: March 3, 2022
    Inventors: DONG EUN LEE, Do Hyung Ryu, Hyun Sang Park
  • Publication number: 20210378107
    Abstract: A display device includes a display panel comprises a display area and a non-display area surrounding the display area; a cover panel disposed on a rear surface of the display panel and comprising a front surface, a first side surface connected to the front surface and bent along a first bending line, a second side surface connected to the front surface and bent along a second bending line intersecting the first bending line, and a first corner located between the first side surface and the second side surface; and an alignment notch defined at the first corner of the cover panel.
    Type: Application
    Filed: May 12, 2021
    Publication date: December 2, 2021
    Inventors: Dae Hyun HWANG, Won Ju KIM, Do Hyung RYU, Wu Hyeon JUNG
  • Patent number: 11183089
    Abstract: A display device includes a display panel having a plurality of pixels and a driving circuit. A plurality of driving lines electrically connects the driving circuit to the display panel and supplies driving signals from the driving circuit to the display panel. A switching unit connects each of the plurality of driving lines to a first end of an inspection line. An inspection circuit is connected to a second end of the inspection line. A line selection unit is configured to selectively connect one or more of the plurality of driving lines to the inspection circuit through the inspection line.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: November 23, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Do Hyung Ryu
  • Publication number: 20200290337
    Abstract: A method of peeling off the protective film includes: providing a panel lower sheet, where a protective film is provided on one surface of the plane lower sheet and the protective film has a bending line extending in a first direction parallel to opposing sides thereof; gripping a portion of the protective film; moving the gripped portion of the protective film in a second direction which is a thickness direction thereof; and moving the panel lower sheet in a third direction perpendicular to the bending line.
    Type: Application
    Filed: February 21, 2020
    Publication date: September 17, 2020
    Inventors: Wu Hyeon JUNG, Do Hyung RYU, Dae Yang BAK, Dae Hyun HWANG
  • Publication number: 20190285691
    Abstract: A display device includes a display panel having a plurality of pixels and a driving circuit. A plurality of driving lines electrically connects the driving circuit to the display panel and supplies driving signals from the driving circuit to the display panel. A switching unit connects each of the plurality of driving lines to a first end of an inspection line. An inspection circuit is connected to a second end of the inspection line. A line selection unit is configured to selectively connect one or more of the plurality of driving lines to the inspection circuit through the inspection line.
    Type: Application
    Filed: November 14, 2018
    Publication date: September 19, 2019
    Inventor: DO HYUNG RYU
  • Patent number: 10255839
    Abstract: A driver for a display panel includes a driving time accumulator, a ditherer, and a data signal generator. The driving time accumulator determines an accumulated driving time of the display panel. The ditherer determines an amount of dither based at least in part on the accumulated driving time, and performs a dithering operation on input image data with the determined amount of dither. The data signal generator generates a data signal for the display panel based at least in part on the input image data on which the dithering operation is to be performed.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: April 9, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae-Hoon Lee, Do-Hyung Ryu, Seung-Ho Park
  • Patent number: 10192491
    Abstract: A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a plurality of current sink units for controlling predetermined currents to flow through data lines, a plurality of voltage generators for resetting values of gray scale voltages using compensation voltages generated when the predetermined currents flow, a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of the data supplied from the outside, and a plurality of switching units for supplying the data signal to the data lines. The predetermined currents may be set equal to pixel currents that correspond to a maximum brightness.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: January 29, 2019
    Assignees: Samsung Display Co., Ltd., IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Do Hyung Ryu, Bo Yong Chung, Hong Kwon Kim, Oh Kyong Kwon
  • Patent number: 10083655
    Abstract: A pixel includes: a first transistor connected between a data line and a first node; a second transistor connected between a first power source and a second node, the second transistor including a gate electrode connected to the first node; a third transistor connected between the first node and a third power source; a fourth transistor connected between the second node and an fourth power source; a capacitor connected between the first node and the second node; and an organic light-emitting diode (OLED) connected between the second node and a second power source.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: September 25, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae Hoon Lee, Young In Hwang, Ji Hye Kong, Jin Woo Kim, Do Hyung Ryu, Yong Sung Park, Jae Woo Song, Byung Hyuk Shin, Hae Goo Jung
  • Patent number: 10062328
    Abstract: An organic light emitting display device includes: pixels including driving transistors positioned in regions divided by scan lines and data lines; a data accumulating unit arranged to accumulate first data; a first storage unit storing current and voltage change information corresponding to a degradation of an organic light emitting diode (OLED); a second storage unit storing a compensation value corresponding at least partially to channel length modulation of the driving transistors; and a timing controller programmed to carry out an altering of first data corresponding to an ith pixel so as to generate second data to be supplied to the ith pixel, the altering carried out according to: accumulation stress information for the ith pixel, the accumulation stress information corresponding to the accumulated first data and being stored in the data accumulating unit, the current and voltage change information, and a compensation value corresponding to the ith pixel.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 28, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae Hoon Lee, Jin Woo Kim, Do Hyung Ryu, Jae Woo Song, Hae Goo Jung
  • Patent number: 10019936
    Abstract: There is provided an organic light emitting display that includes a plurality of pixels are arranged in a plurality of rows and columns Each of the pixels includes a plurality of sub pixels. At least one sub pixel of the plurality of sub pixels of at least one pixel is divided into a plurality of divisional sub pixels. Since the divisional sub pixels alternately emit light, it is possible to reduce deterioration speed of the sub pixels, thereby preventing an afterimage from being generated by deterioration of the sub pixels.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: July 10, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hae-Goo Jung, Do-Hyung Ryu
  • Patent number: 10019939
    Abstract: An organic light emitting display device includes a display panel having pixels and a display panel driver driving the display panel. Each of the pixels includes an organic light emitting diode, and the display panel driver selects one of the pixels, determines a reference grayscale value, compares a grayscale value, and determines the selected pixel as a low grayscale pixel when the grayscale value is lower than the reference grayscale value and higher than a black grayscale value. Some of the low grayscale pixels display the black grayscale value when there are more than one neighboring low grayscale pixels. The reference grayscale value is determined based on a reference grayscale variable, and the reference grayscale variable includes at least one of a temperature of the display panel, a time period when the selected pixel emits light, and a wavelength of light emitted by the selected pixel.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: July 10, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae Hoon Lee, Seung Ho Park, Do Hyung Ryu, Jae Woo Song, Hae Goo Jung
  • Publication number: 20180033377
    Abstract: A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a plurality of current sink units for controlling predetermined currents to flow through data lines, a plurality of voltage generators for resetting values of gray scale voltages using compensation voltages generated when the predetermined currents flow, a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of the data supplied from the outside, and a plurality of switching units for supplying the data signal to the data lines. The predetermined currents may be set equal to pixel currents that correspond to a maximum brightness.
    Type: Application
    Filed: October 12, 2017
    Publication date: February 1, 2018
    Inventors: Do Hyung Ryu, Bo Yong Chung, Hong Kwon Kim, Oh Kyong Kwon
  • Patent number: 9837018
    Abstract: A display panel includes input power supply line coupled to a power supply at one or more edge portions of the display panel, and an output power supply line coupled to the input power supply line at a predetermined portion of the display panel. The input power supply line receives the power supply voltage, and the output power supply line receives the power supply voltage from the input power supply line. The power supply is coupled to the output power supply line at the one or more edge portions of the display panel, and receives the power supply voltage from the output power supply line to adjust a voltage level of the power supply voltage based on the power supply voltage from the output power supply line. The predetermined portion is at a location different from an edge of the display panel.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: December 5, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Hoon Lee, Jong-Man Bae, Byeong-Doo Kang, Jin-Woo Kim, Do-Hyung Ryu, Jae-Woo Song, Byung-Hyuk Shin, Baek-Woon Lee, Hae-Goo Jung
  • Patent number: 9812065
    Abstract: A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a plurality of current sink units for controlling predetermined currents to flow through data lines, a plurality of voltage generators for resetting values of gray scale voltages using compensation voltages generated when the predetermined currents flow, a plurality of digital-to-analog converters for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of the data supplied from the outside, and a plurality of switching units for supplying the data signal to the data lines. The predetermined currents may be set equal to pixel currents that correspond to a maximum brightness.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: November 7, 2017
    Assignees: Samsung Display Co., Ltd., Industry-University Cooperation Foundation Hanyang University
    Inventors: Do Hyung Ryu, Bo Yong Chung, Hong Kwon Kim, Oh Kyong Kwon
  • Patent number: 9805644
    Abstract: A flat panel display device includes: a first display unit, a second display unit, and a third display unit. The first display unit comprises a (1-1)-th surface facing a (1-2)-th surface, and is configured to display an image on the (1-1)-th surface and enable external light to transmit from the (1-2)-th surface to the (1-1)-th surface. The second display unit comprises a (2-1)-th surface facing a (2-2)-th surface, and is configured to display an image on the (2-1)-th surface and enable external light to transmit from the (2-2)-th surface to the (2-1)-th surface. The third display unit comprises a (3-1)-th surface facing a (3-2)-th surface, and is configured to display an image on the (3-1)-th surface. The third display unit is disposed between the first display unit and the second display unit.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: October 31, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Hae-Goo Jung, Tae-Seok Jang
  • Patent number: 9786226
    Abstract: A display panel module, organic light-emitting diode (OLED) display and method of driving the same are disclosed. In one aspect, the module includes a display panel divided into a first portion and a second portion and a plurality of scan and data lines divided into groups arranged in the first and second potions. The module further includes a first scan driver configured to sequentially apply scan signals to each of the first and second scan line groups. The first scan driver is further configured to substantially simultaneously apply the scan signals to corresponding scan lines of the first and second scan line groups. The module also includes a first data driver configured to output first data voltages to the first data line group and a second data driver configured to output second data voltages to the second data line group with the same timing as the first data driver.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: October 10, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Hoon Lee, Do-Hyung Ryu, Jae-Woo Song, Hae-Goo Jung