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: 8902207
    Abstract: An organic light emitting display includes a mode determining unit adapted to determine whether the display is in a low power or common driving mode based on an operation control signal and to generate a control signal corresponding to the determined mode, a scan driver adapted to sequentially supply scan signals to scan lines, a data driver adapted to supply data signals to data lines in synchronization with the scan signals, pixels arranged at intersections of the scan lines and the data lines, and a timing controller adapted to control the scan driver and the data driver so that a frame frequency changes based on whether the low power driving mode or the common driving mode control signal is supplied from the mode determining unit, wherein the scan driver is adapted to uniformly maintain a pulse width of the scan signals regardless of a change in the frame frequency.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: December 2, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Keum-Nam Kim, Sang-Moo Choi
  • Publication number: 20140346455
    Abstract: An organic light-emitting diode (OLED) display is disclosed. In one aspect, the OLED display includes a substrate, an organic light-emitting portion, a sealing member, and first and second connecting members. The organic light-emitting portion includes a first electrode positioned on the substrate, an organic light-emitting layer formed on the first electrode, and a second electrode formed on the organic light-emitting layer. The sealing member includes a first conductive layer positioned on the organic light-emitting portion and electrically connected to the second electrode, a second conductive layer electrically connected to the first electrode, and an insulating layer interposed between the first and second conductive layers. The first connecting member is connected to the first conductive layer to supply a first power source, and the second connecting member is connected to the second conductive layer to supply a second power source.
    Type: Application
    Filed: October 1, 2013
    Publication date: November 27, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hae-Goo Jung, Do-Hyung Ryu
  • Patent number: 8896236
    Abstract: An organic light emitting diode (OLED) display is provided. The OLED display includes: a substrate; an organic light emitting element including a first electrode on the substrate, an organic emission layer on the first electrode, and a second electrode on the organic emission layer; and an encapsulation member encapsulating the organic light emitting element and including a first conductive layer on the organic light emitting element and electrically connected to the second electrode, an insulation layer on the first conductive layer, and a second conductive layer on the insulation layer and configured to electrically connect to the first electrode.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: November 25, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hae-Goo Jung, Do-Hyung Ryu, Kuen-Dong Ha
  • Patent number: 8890777
    Abstract: An organic light emitting display capable of compensating for threshold voltage variations of a driving transistor may include scan and data drivers, pixels, an initial power source unit, a switching unit, a compensating unit, and a timing controller. The scan and data drivers may control current that flows from a first to a second power source via an OLED. The switching unit may selectively couple the initial power source unit to the data driver. The compensating unit may store second data corresponding to a threshold voltage of a driving transistor and may transmit the stored second data to the data driver. The timing controller may transmit the externally supplied first data input to the data driver and may control the scan driver, the data driver, and the compensating unit. The data driver may generate and supply third data signals to the pixels using the first and the second data.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: November 18, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Dong-Yong Shin
  • Patent number: 8848002
    Abstract: A display device includes: a plurality of pixels; an image data compensator for outputting compensated image data by controlling peak luminance of image data; and a data driver for transmitting the compensated image data to the plurality of pixels, wherein the image data compensator is configured to control luminance of the image data by using a global image load of an image in its entirety, a plurality of first local image loads of a plurality of the first partitions generated by dividing the image by a first unit area, and a plurality of second local image loads of a plurality of second partitions generated by dividing the image by a second unit area. Power consumption of the display device can be reduced, and image quality is improved by improving peak luminance and contrast of the display image.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: September 30, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Do-Hyung Ryu
  • Patent number: 8847246
    Abstract: An organic light emitting diode display is disclosed. The organic light emitting diode display includes a base substrate including a display area and a non-display area around the display area, a plurality of pixels formed over the display area of the base substrate, the plurality of pixels including a common electrode, a common power line formed over the base substrate and electrically connected to a circuit of each of the plurality of pixels, an encapsulation substrate bonded to the base substrate by a sealing member surrounding the plurality of pixels, the encapsulation substrate including an inner surface facing the base substrate, a first conductive layer formed over the inner surface and electrically connecting the common power line to a first potential, and a second conductive layer formed over the inner surface and spaced apart from the first conductive layer, the second conductive layer electrically connecting the common electrode to a second potential.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: September 30, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Chun-Seok Ko, Kie Hyun Nam
  • Patent number: 8836691
    Abstract: An organic light emitting display that can stably extract information from pixels.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: September 16, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Keum-Nam Kim, Sang-Moo Choi
  • Publication number: 20140198133
    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: Application
    Filed: June 13, 2013
    Publication date: July 17, 2014
    Inventors: Hae-Goo Jung, Do-Hyung Ryu
  • Patent number: 8779659
    Abstract: An embodiment provides an organic light emitting diode display device that includes a substrate; a display unit formed on the substrate and including a common power supply line and a common electrode; a sealing substrate attached to the substrate by a bonding layer which surrounds the display unit, the sealing substrate including a resin base and a carbon fiber, and the sealing substrate including a first through-hole and a second through-hole; a first conductive unit formed on an inner surface and an outer surface of the sealing substrate through the first through-hole, and the first conductive unit supplying a first signal to the common power supply line; and a second conductive unit formed on both the inner surface and the outer surface of the sealing substrate through the second through-hole, and the second conductive unit supplying a second signal to the common electrode.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: July 15, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Chun-Seok Ko, Sang-Soo Kim
  • Publication number: 20140151654
    Abstract: A display device includes a display panel and a flexible printed circuit (FPC) connected to the display panel. The FPC includes a first region and a second region, the second region having greater flexibility than the first region.
    Type: Application
    Filed: October 16, 2013
    Publication date: June 5, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Hae-Goo Jung
  • Publication number: 20140125713
    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: January 8, 2014
    Publication date: May 8, 2014
    Applicants: IUCF-HYU (Industry-University Corporation Foundation Hanyang University), SAMSUNG DISPLAY CO., LTD.
    Inventors: Do Hyung Ryu, Bo Yong Chung, Hong Kwon Kim, Oh Kyong Kwon
  • Patent number: 8710736
    Abstract: An organic light emitting display (OLED) apparatus has an improved structure so as to decrease a capacitance load between a power line and a control signal line. The OLED display apparatus includes a first substrate on which a thin film transistor (TFT) and an organic light emitting diode are disposed; a second substrate facing towards and spaced apart from the first substrate; a power line via which a voltage is applied to the source and drain electrodes of the TFT, and to the second electrode of the OLED; and a control signal line providing a control signal to the embedded circuit so as to control timing for supplying current to the gate electrode of the TFT. The control signal line is laid-out at an outer portion of the first substrate with respect to a position of the power line.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: April 29, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Chun-Seok Ko, Sang-Soo Kim
  • Publication number: 20140103315
    Abstract: A manufacturing method of an organic light emitting diode (OLED) display includes: supplying a circuit film on the pad area of the display panel and bonding a first end portion of the circuit film to the pad area; vertically standing and inserting the display panel in a bonding device; holding a portion of the circuit film including a second end portion to be horizontal by using a rotating device including a vacuum absorbing portion; supplying a flexible printed circuit (FPC) into a space under the second end portion of the circuit film, and attaching the flexible printed circuit to the second end portion of the circuit film; and operating the rotating device to move the second end portion to a vertical position, and separating the circuit film from the vacuum absorbing portion.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 17, 2014
    Inventors: Hae- Goo Jung, Do-Hyung Ryu
  • Patent number: 8686982
    Abstract: A current generator for supplying or sinking current to/from pixels. The current generator includes a variable power source, a first amplifier having a first input terminal coupled to the variable power source, a sensing resistor coupled between an output terminal of the first amplifier and an external terminal of the current generator, and a second amplifier having a first input terminal and a second input terminal coupled to respective ends of the sensing resistor and an output terminal coupled to a second input terminal of the first amplifier.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: April 1, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Do-Ik Kim
  • Patent number: 8674363
    Abstract: An organic light emitting display apparatus includes a substrate on which a display area and a non-display area are defined, a first electrode on the substrate, an intermediate layer on the first electrode, the intermediate layer includes an organic emission layer, a second electrode on the intermediate layer, a plurality of pad units on the non-display area, and an insulating layer on the pad units. The insulating layer includes contact holes overlapping upper surfaces of the pad units and grooves adjacent to the contact holes.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: March 18, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sun Park, Do-Hyung Ryu
  • Publication number: 20140054557
    Abstract: A display device including a substrate, a display unit on the substrate, a sealing substrate coupled to the display unit, a plurality of power pads on the sealing substrate and electrically coupled to the display unit, and a connector including a housing unit, a power connection unit electrically coupled to the plurality of power pads, and a power contact unit for maintaining contact between the plurality of power pads and the power connection unit.
    Type: Application
    Filed: January 8, 2013
    Publication date: February 27, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hae-Goo Jung, Do-Hyung Ryu
  • Patent number: 8659511
    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: August 7, 2006
    Date of Patent: February 25, 2014
    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: 8643002
    Abstract: An organic light emitting diode display includes a substrate, a display unit that includes a common power line and a common electrode, an encapsulation substrate that is attached to the substrate by an adhering layer enclosing the display unit and includes a resin matrix and a plurality of carbon fiber. The display includes a first conductive portion and a second conductive portion. The first conductive portion is on a first inner surface region, a first side surface region, and a first outer surface region of the encapsulation substrate. The first conductive portion is adapted to supply a first electrical signal to the common power line. The second conductive portion is on a second inner surface region, a second side surface region, and a second outer surface region of the encapsulation substrate. The second conductive portion is adapted to supply a second electrical signal to the common electrode.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: February 4, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Chun-Seok Ko, Sang-Soo Kim
  • Patent number: 8624804
    Abstract: A method of driving an organic light emitting diode (OLED) display device that displays grayscales in a time-division manner and can prevent the occurrence of false contours and flickers at an interface between neighboring grayscales when displaying sequential images, such as moving images, at a high speed. The method is an interlaced scanning method in which a single frame is divided into an odd-numbered field and an even-numbered field that are sequentially driven, and includes dividing each of the odd-numbered field and the even-numbered field into x sub-frame groups; dividing each of a plurality of sub-frames corresponding to bits of driving data into y divided sub-frame portions; and disposing the y divided sub-frame portions in different ones of the x sub-frame groups.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: January 7, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Hyung Ryu, Do-Ik Kim
  • Patent number: 8593378
    Abstract: An organic light emitting display device capable of displaying an image of uniform brightness. A scan driver drives scan lines and light emitting control lines that are formed parallel to each other. A data driver drives data lines formed at a direction intersecting the scan lines and the light emitting control lines, and pixels are disposed to be coupled with the scan lines, the light emitting control lines, and the data lines. An auxiliary line is formed parallel to the data lines. One side of the auxiliary line is coupled with a reference power supply and another side of the auxiliary line is coupled with a current source. Connectors are disposed at crossing areas of the auxiliary line and the scan lines. A voltage transfer unit is coupled with the connectors and transfers a voltage supplied to the connectors to the data driver.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: November 26, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do Hyung Ryu, Bo Yong Chung, Oh Kyong Kwon