Patents by Inventor Bo-Yong Chung

Bo-Yong Chung 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: 10388220
    Abstract: A pixel including an organic light emitting diode; a first transistor for controlling the amount of current flowing from a first driving power source to a second driving power source via the organic light emitting diode, corresponding to a voltage of a first node; a second transistor coupled between the first node and a second node, the second transistor being turned on when a scan signal is supplied to an ith (i is a natural number) scan line; a third transistor coupled between the second node and an anode electrode of the organic light emitting diode; a first capacitor coupled between a data line and the second node; and a fourth transistor coupled between an initialization power source and the anode electrode of the organic light emitting diode. The fourth transistor is turned on in response to a first control signal being supplied to a first control line.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: August 20, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo Yong Chung, Jun Hyun Park, Young Wan Seo, An Su Lee, Kang Moon Jo, Chong Chul Chai
  • Publication number: 20190251904
    Abstract: A display device having a frame period including reset, compensation, relay, emission, and initialization periods. Each pixel includes: an organic light emitting diode having an anode coupled to a second node and a electrode coupled to a second power source; a first transistor between a first power source and the second node, and a gate electrode coupled to a first node; a second transistor between the first node and the second node; a third transistor between the first power source and a third node; a fourth transistor between a fourth node and the third node; a fifth transistor between a data line and the fourth node; a sixth transistor between a third power source and the second node; a first capacitor between the third node and the first node; and a second capacitor coupled the fourth node and the third power source.
    Type: Application
    Filed: November 28, 2018
    Publication date: August 15, 2019
    Inventors: Dong Woo KIM, Bo Yong CHUNG, Yeon Kyung KIM, Chong Chul CHAI
  • Patent number: 10365690
    Abstract: A flexible display device according to example embodiments includes a rollable display panel, a housing accommodating the rollable display panel in a rolled state and including an opening portion through which the rollable display panel is pulled out, an optical sensor disposed at the opening portion and configured to detect luminance of the rollable display panel while the rollable display panel is rolled or unrolled, a controller configured to compensate image data based on detection data generated by the optical sensor, and a display panel driver configured to control a display of rollable display panel.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: July 30, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hai-Jung In, Bo-Yong Chung
  • Patent number: 10283054
    Abstract: A pixel includes first to fourth transistors and a driving transistor. The first transistor is connected between a data line and a first node and has a gate electrode to receive a scan signal. The driving transistor is connected between the first node and a second node and has a gate electrode connected to a third node. The second transistor is connected between the second and third nodes and has a gate electrode to receive the scan signal. The third transistor is connected between first power and the first node and has a gate electrode to receive an emission signal. The fourth transistor is connected between the first and second nodes and has a gate electrode to receive an initialization signal. An organic light emitting diode is connected between the second node and second power. A storage capacitor is connected between the first power and third node.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 7, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun-Hyun Park, An-Su Lee, Ji-Hye Lee, Bo-Yong Chung, Kang-Moon Jo, Chong-Chul Chai
  • Publication number: 20190131380
    Abstract: A static electricity prevention circuit of a display device including: a driving circuit configured to drive a display unit that displays an image, at least one clock signal wire configured to transmit a clock signal to the driving circuit, at least one transistor electrically coupled to the clock signal wire, and at least one capacitor including a first electrode coupled to a source electrode and to a drain electrode of the transistor, and a second electrode configured to be maintained at a voltage.
    Type: Application
    Filed: December 26, 2018
    Publication date: May 2, 2019
    Inventors: Yong-Jae Kim, Bo-Yong Chung, Hae-Yeon Lee
  • Patent number: 10242626
    Abstract: A stage includes an output unit configured to supply a scan signal to an output terminal according to voltages of first and second nodes; a first driver configured to control the voltages of the first and second nodes so that when a start signal or an output signal of a previous stage is supplied to a first input terminal, the scan signal is supplied from the output unit; and a second driver configured to control the voltages of the first and second nodes, corresponding to signals supplied to a second input terminal, a fourth input terminal and a fifth input terminal, wherein the second driver comprises eighth and ninth transistors coupled in series between the output terminal and the second node, and wherein a gate electrode of the eighth transistor is coupled to the first node, and a gate electrode of the ninth transistor is coupled to the fourth input terminal.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: March 26, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hae-Yeon Lee, Yong-Jae Kim, Bo-Yong Chung
  • Patent number: 10235926
    Abstract: A scanline driver and a display device including the same are disclosed. In one aspect, the scanline driver includes a driving circuit configured to provide a first driving signal to a first driving node and a second driving signal to a second driving node based on a scan input signal and a plurality of clock signals. The driving circuit includes a plurality of driving transistors and a plurality of reset transistors. The scanline driver also includes a buffer circuit configured to generate a scan output signal based on the first and second driving signals. The buffer circuit includes a plurality of buffer transistors. Each of the driving transistors and the buffer transistors includes a floating gate transistor which includes a floating gate configured to transfer a voltage corresponding to a second logic low level lower than a first logic low level.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: March 19, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hai-Jung In, Bo-Yong Chung
  • Patent number: 10198998
    Abstract: There is provided a gate driver including a plurality of gate sub-drivers electrically connected to a plurality of gate lines, wherein an (n)th gate sub-driver, of the gate sub-drivers includes a shift register configured to receive an (n?1)th carry signal from an (n?1)th gate sub-driver of the gate sub-drivers adjacent to the (n)th gate sub-driver, to synchronize the (n?1)th carry signal with a first clock signal, and to output an (n)th carry signal based on the synchronized (n?1)th carry signal, and a mask configured to output a gate signal based on the synchronized (n?1)th carry signal and a mask signal, wherein n is an integer greater than or equal to 2.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: February 5, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hai-Jung In, Bo-Yong Chung
  • Patent number: 10199450
    Abstract: A static electricity prevention circuit of a display device including: a driving circuit configured to drive a display unit that displays an image, at least one clock signal wire configured to transmit a clock signal to the driving circuit, at least one transistor electrically coupled to the clock signal wire, and at least one capacitor including a first electrode coupled to a source electrode and to a drain electrode of the transistor, and a second electrode configured to be maintained at a voltage.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 5, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Jae Kim, Bo-Yong Chung, Hae-Yeon Lee
  • 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
  • Publication number: 20180342573
    Abstract: A static electricity prevention circuit of a display device including: a driving circuit configured to drive a display unit that displays an image, at least one clock signal wire configured to transmit a clock signal to the driving circuit, at least one transistor electrically coupled to the clock signal wire, and at least one capacitor including a first electrode coupled to a source electrode and to a drain electrode of the transistor, and a second electrode configured to be maintained at a voltage.
    Type: Application
    Filed: July 16, 2018
    Publication date: November 29, 2018
    Inventors: Yong-Jae Kim, Bo-Yong Chung, Hae-Yeon Lee
  • Patent number: 10102803
    Abstract: A display apparatus includes a plurality of pixels. Each pixel includes a first capacitor connected between a first voltage line receiving a 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; a second transistor comprising a control electrode connected to an n-th gate line, a first electrode connected to the first node, and a second electrode connected to the second node; and a third transistor comprising a control electrode connected to an n-th scan line, a first electrode connected to the first voltage line, and a second electrode connected to the second node.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: October 16, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun-Hyun Park, An-Su Lee, Bo-Yong Chung, Chong-Chul Chai
  • Publication number: 20180226029
    Abstract: A pixel includes first to fourth transistors and a driving transistor. The first transistor is connected between a data line and a first node and has a gate electrode to receive a scan signal. The driving transistor is connected between the first node and a second node and has a gate electrode connected to a third node. The second transistor is connected between the second and third nodes and has a gate electrode to receive the scan signal. The third transistor is connected between first power and the first node and has a gate electrode to receive an emission signal. The fourth transistor is connected between the first and second nodes and has a gate electrode to receive an initialization signal. An organic light emitting diode is connected between the second node and second power. A storage capacitor is connected between the first power and third node.
    Type: Application
    Filed: September 6, 2017
    Publication date: August 9, 2018
    Inventors: Jun-Hyun PARK, An-Su LEE, Ji-Hye LEE, Bo-Yong CHUNG, Kang-Moon JO, Chong-Chul CHAI
  • Publication number: 20180226028
    Abstract: A pixel for a display panel includes first and second transistors, first and second capacitors, and an organic light emitting diode. The first transistor has a gate electrode connected to a first node, a first electrode connected to a first power source, and a second electrode connected to a second node. The second transistor has a gate electrode connected to a scan line, a first electrode connected to the first node, and a second electrode connected to the second node. The organic light emitting diode has a first electrode connected to the second node and a second electrode connected to a second power source. The first capacitor has a first electrode connected to a third power source and a second electrode connected to the first node. The second capacitor has a first electrode connected to a data line and a second electrode connected to the second node.
    Type: Application
    Filed: October 6, 2017
    Publication date: August 9, 2018
    Inventors: Jun-Hyun PARK, Young-Wan SEO, An-Su LEE, Bo-Yong CHUNG, Kang-Moon JO, Chong-Chul CHAI
  • Publication number: 20180226023
    Abstract: A display panel driver drives pixels based on first power having at least three voltage levels, second power having a constant voltage, and third power having two voltage levels. Each pixel includes a first transistor connected between first and second nodes and including a gate electrode to receive a scan signal, a second transistor connected between the second node and a third node in series with the first transistor and including a gate electrode to receive the third power, and a driving transistor connected between a source of the first power and the third node and including a gate electrode connected to the first electrode to control a driving current for an organic light emitting diode. A first capacitor is connected between a source of the third power and the first node, and a second capacitor is connected between the second node and one of the data lines.
    Type: Application
    Filed: January 5, 2018
    Publication date: August 9, 2018
    Inventors: Jun-Hyun PARK, Young-Wan SEO, An-Su LEE, Bo-Yong CHUNG, Kang-Moon JO, Chong-Chul CHAI
  • Publication number: 20180204510
    Abstract: A pixel including an organic light emitting diode; a first transistor for controlling the amount of current flowing from a first driving power source to a second driving power source via the organic light emitting diode, corresponding to a voltage of a first node; a second transistor coupled between the first node and a second node, the second transistor being turned on when a scan signal is supplied to an ith (i is a natural number) scan line; a third transistor coupled between the second node and an anode electrode of the organic light emitting diode; a first capacitor coupled between a data line and the second node; and a fourth transistor coupled between an initialization power source and the anode electrode of the organic light emitting diode. The fourth transistor is turned on in response to a first control signal being supplied to a first control line.
    Type: Application
    Filed: September 7, 2017
    Publication date: July 19, 2018
    Inventors: Bo Yong CHUNG, Jun Hyun PARK, Young Wan SEO, An Su LEE, Kang Moon JO, Chong Chul CHAI
  • Patent number: 10026798
    Abstract: A static electricity prevention circuit of a display device including: a driving circuit configured to drive a display unit that displays an image, at least one clock signal wire configured to transmit a clock signal to the driving circuit, at least one transistor electrically coupled to the clock signal wire, and at least one capacitor including a first electrode coupled to a source electrode and to a drain electrode of the transistor, and a second electrode configured to be maintained at a voltage.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: July 17, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Jae Kim, Bo-Yong Chung, Hae-Yeon Lee
  • 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: 20180166010
    Abstract: A display apparatus includes a plurality of pixels. Each pixel includes a first capacitor connected between a first voltage line receiving a 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; a second transistor comprising a control electrode connected to an n-th gate line, a first electrode connected to the first node, and a second electrode connected to the second node; and a third transistor comprising a control electrode connected to an n-th scan line, a first electrode connected to the first voltage line, and a second electrode connected to the second node.
    Type: Application
    Filed: July 10, 2017
    Publication date: June 14, 2018
    Inventors: Jun-Hyun PARK, An-Su LEE, Bo-Yong CHUNG, Chong-Chul CHAI
  • Publication number: 20180166012
    Abstract: A display device includes a display panel including a first pixel, a second pixel, and a third pixel, a scan driver configure to provide a scan signal to the first through the third pixels, a data driver which provides a data signal to the first through the third pixels, a reference voltage generator which provides a first reference voltage that compensates a degradation of a first driving transistor, a second reference voltage that compensates a degradation of a second driving transistor, and a third reference voltage that compensates a degradation of a third driving transistor, and a timing controller which generates a control signal that controls the scan driver, the data driver, and the reference voltage generator.
    Type: Application
    Filed: February 9, 2018
    Publication date: June 14, 2018
    Inventors: Bo-Yong CHUNG, Dong-Gyu KIM, Hai-Jung IN