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).

  • Publication number: 20150021591
    Abstract: A thin film transistor is disclosed. In one aspect, the thin film transistor includes a substrate, a semiconductor layer formed on the substrate, and a first gate electrode substantially overlapping the semiconductor layer with a gate insulating layer interposed therebetween. The thin film transistor also includes a second gate electrode substantially overlapping the first gate electrode with an interlayer insulating layer interposed therebetween, and a source electrode and a drain electrode electrically connected to the semiconductor layer, wherein the first gate electrode is electrically connected to the second gate electrode.
    Type: Application
    Filed: December 18, 2013
    Publication date: January 22, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jung-Bae Kim, Bo-Yong Chung, Hae-Yeon Lee, Hai-Jung In
  • Publication number: 20150021595
    Abstract: An electro static discharge (ESD) protection circuit including a signal transmission line coupled to an external input terminal, the ESD protection circuit including: a first power line coupled to a high voltage power supply; a second power line coupled to a low voltage power supply; a plurality of first oxide thin film transistors coupled in parallel between the first power line and the signal transmission line, the first oxide thin film transistors being diode-connected; and a plurality of second oxide thin film transistors coupled in parallel between the signal transmission line and the second power line, the second oxide thin film transistors being diode-connected.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 22, 2015
    Inventors: Hai-Jung In, Bo-Yong Chung
  • Patent number: 8928642
    Abstract: A pixel and an organic light emitting display device using the same are provided. The pixel includes an organic light emitting diode. A first transistor has a second electrode coupled to the organic light emitting diode, and controls the amount of current supplied to the organic light emitting diode. A third transistor is coupled between a reference power source and a first node, and is turned on when a scan signal is supplied to a scan line. A second transistor is turned on when the scan signal is supplied to the scan line, and electrically couples a data line to a second node. A fourth transistor is coupled between the first and second nodes, and is turned off when an emission control signal is supplied to an emission control line. A storage capacitor is coupled between the second node and a first electrode of the first transistor.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: January 6, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Bo-Yong Chung
  • Patent number: 8922471
    Abstract: A driving device comprises: a first driver driven by a first input signal and generating a first interim output signal controlled by a first clock signal; a second driver driven by a second input signal and generating a second interim output signal controlled by a second clock signal; and a plurality of shift registers including a buffer driven by the first interim output signal and the second interim output signal and generating an output signal controllable by the first clock signal and the second clock signal. The buffer includes a second transistor connected to a gate electrode of a first transistor for transmitting a voltage with a first level with the output signal and transmitting a voltage with a second level for turning off the first transistor.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: December 30, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Bo-Yong Chung
  • Patent number: 8913090
    Abstract: A pixel circuit includes a light emitting device, an N-type driving transistor for outputting a driving current according to a voltage applied to the gate electrode, a first capacitor coupled to a gate electrode of the driving transistor, a second capacitor including a first terminal coupled to the gate electrode of the driving transistor and a second terminal coupled to the first electrode of the light emitting device, and second through sixth N-type transistors. An initialization period is reduced for a driving operation and the threshold voltage compensation time of a driving transistor is controlled.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: December 16, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Yong Chung, Yong-Sung Park
  • Patent number: 8912996
    Abstract: A scan driver including sequentially arranged scan driving blocks, each of the blocks including a first node receiving a signal input into a driving signal input terminal based on a clock signal input into a second-clock-signal input terminal, a second node receiving a clock signal input into a first-clock-signal input terminal, a first transistor including a gate electrode connected to the second node, one electrode receiving an output control signal, and another electrode connected to an output terminal, a second transistor including a gate electrode connected to the first node, one electrode connected to a third-clock-signal input terminal, and another electrode connected to the output terminal, and a third transistor including a gate electrode connected to the third-clock-signal input terminal and one electrode connected to the first node and configured to transfer a voltage of the output terminal to the first node.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 16, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Jae Kim, Bo-Yong Chung, Dong-Beom Lee, Min-Hyuk Choi
  • Patent number: 8912989
    Abstract: An organic light emitting display device includes: a scan driver for supplying partially overlapping scan signals having at least 2H width and for supplying emission control signals; a data driver; and pixels, each including: an OLED having a cathode coupled to second power; a first transistor having a first electrode coupled to first power; a second transistor between a gate electrode and a second electrode of the first transistor and turned on when the scan signal is supplied to a current scan line; a third transistor between the data line and a second node and turned on when the scan signal is supplied to a subsequent scan line; a first capacitor coupled between the first transistor gate electrode and the second node; and a fourth transistor turned on when the scan signal is supplied to a previous scan line to supply a first voltage to the first transistor gate electrode.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: December 16, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Yong Chung, Yong-Sung Park
  • Publication number: 20140353608
    Abstract: There is provided a pixel, including an organic light emitting diode (OLED), a first transistor whose gate electrode is coupled to a first node, whose first electrode is coupled to a first power supply via a third node, and whose second electrode is coupled to an anode electrode of the OLED, a second transistor coupled between a data line and a second node and turned on when a scan signal is supplied to a scan line, a first capacitor coupled between the second node and a first voltage source, a third transistor coupled between the second node and the first node and turned on when a second control signal is supplied, and a fourth transistor coupled between the first node and the first power supply and turned on when a first control signal is supplied.
    Type: Application
    Filed: October 23, 2013
    Publication date: December 4, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: YONG-JAE KIM, HAE-YEON LEE, BO-YONG CHUNG, JIN-GON OH
  • Publication number: 20140354711
    Abstract: An organic light emitting display device includes pixels, a scan driver, a memory configured to store pixel data containing information indicative of threshold voltages and mobilities of first transistors in the pixels, a timing controller configured to modify one or more bits of first data to generate second data, the first data modified in response to the pixel data, a data driver configured to generate data signals based on the second data, and a control driver configured to supply a first control signal to a first control line commonly coupled to the pixels and a second control signal to a second control line, wherein each of the pixels is configured to store a data signal of a current frame and to emit light corresponding to a data signal of a previous frame.
    Type: Application
    Filed: March 14, 2014
    Publication date: December 4, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hai-Jung IN, Jung-Bae KIM, Bo-Yong CHUNG
  • Publication number: 20140354522
    Abstract: A method of driving an OLED display includes: during a scanning period of a first frame, turning off a relay transistor and turning on a switching transistor to enable a second data voltage applied to a data line to be stored in a first capacitor; and during a light emitting period of the first frame, performing an operation to turn on a light emitting transistor and a compensation transistor to enable a voltage into which a first data voltage and a threshold voltage of a driving transistor are reflected to be applied to a second node for enabling the OLED to emit light by a driving current which flows into a driving transistor. The scanning period and the light emitting period temporally overlap each other.
    Type: Application
    Filed: September 30, 2013
    Publication date: December 4, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: BO-YONG CHUNG, Hae-Yeon Lee, Yong-Jae Kim
  • Publication number: 20140354517
    Abstract: A pixel includes an organic light emitting diode (OLED) having a cathode electrode coupled to a second power supply, a pixel circuit configured to control an amount of current supplied to the OLED to correspond to a previous data signal, and a driver configured to store a present data signal supplied from a data line and to supply the previous data signal to the pixel circuit. The OLED, pixel circuit, and driver may be controlled by signals in a frame that includes first through fourth periods, the second power supply may be set to a first voltage in the first and second periods and to a second voltage in the third and fourth periods, and the first voltage may be a voltage at which the OLED does not emit light and the second voltage may be a voltage at which the OLED emits light.
    Type: Application
    Filed: April 11, 2014
    Publication date: December 4, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Bo-Yong CHUNG, Hai-Jung IN, Jung-Bae KIM
  • Publication number: 20140353605
    Abstract: A thin film transistor includes a substrate, a semiconductor layer on the substrate, a first insulating layer covering the substrate and the semiconductor layer, a first gate electrode on the first insulating layer and overlapping the semiconductor layer, a second insulating layer covering the first gate electrode and the first insulating layer, a second gate electrode on the second insulating layer and overlapping the semiconductor layer and the first gate electrode, a third insulating layer covering the second gate electrode, a first contact hole defined in the first insulating layer, the second insulating layer and the third insulating layer, and through which a portion of the semiconductor layer is exposed, and a source electrode and a drain electrode connected to the semiconductor layer through the first contact hole.
    Type: Application
    Filed: October 16, 2013
    Publication date: December 4, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Jung-Bae KIM, Bo-Yong CHUNG, Hai-Jung IN, Dong-Gyu KIM
  • Patent number: 8902208
    Abstract: An organic light emitting display device includes a scan driver, a data driver, and pixels. The scan driver is for sequentially supplying, during each horizontal period of a width 1H, a scan signal with a width of at least 2H to scan lines. The scan driver is further for sequentially supplying an emission control signal to emission control lines that are substantially parallel to the scan lines. The data driver supplies data signals to data lines. Each pixel includes an organic light emitting diode (OLED), a pixel circuit having a first transistor for controlling the amount of current supplied to the OLED, and a compensator for controlling the voltage of a gate electrode of the first transistor for compensating a degradation of the OLED. The compensator includes two transistors and a capacitor. One transistor is coupled to a scan line, and the other is coupled to an emission control line.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: December 2, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Yong Chung, Yong-Sung Park
  • Publication number: 20140333512
    Abstract: A pixel circuit for an organic light emitting diode (OLED) display is disclosed. One inventive aspect includes an organic light emitting diode, a first transistor, a storage unit, a second transistor and a third transistor. The first transistor controls the amount of current flowing from a first power source coupled to a second power source via a second node and the organic light emitting diode in response to a voltage at a first node. The storage unit is connected to a data line, and stores a data signal from the data line. The second transistor is connected to a fourth node and the first node and is turned on when a second control signal is supplied. The third transistor is connected to the first node and a third node and is turned on when a third control signal is supplied.
    Type: Application
    Filed: September 26, 2013
    Publication date: November 13, 2014
    Applicant: Samsung Display Co., Ltd.
    Inventors: Hai-Jung In, Jung-Bae Kim, Bo-Yong Chung
  • Publication number: 20140333600
    Abstract: A pixel circuit for an organic light emitting diode (OLED) display is disclosed. One inventive aspect includes an organic light emitting diode, a first transistor, a second transistor, a first capacitor connected to a second node and a fixed voltage source, a third transistor, a fourth transistor, a second capacitor connected to the fourth transistor and a third node, a first control transistor and a second control transistor. The fourth transistor is connected to the first and third nodes and is turned off when an emission control signal is supplied to an emission control line and turned on otherwise. The first control transistor is connected to the third node and the first power source and is turned on when a first control signal is supplied.
    Type: Application
    Filed: September 27, 2013
    Publication date: November 13, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hae-Yeon Lee, BO-YONG CHUNG, YONG-JAE KIM, JUNG-BAE KIM
  • Patent number: 8878751
    Abstract: An organic light emitting display includes: pixels located at crossing regions between scan lines and data lines; a first control line and a second control line commonly coupled to the pixels; a control line driver configured to supply a first control signal to the first control line for a reset period and to supply a second control signal to the second control line during the reset period and a compensation period. Each pixel includes: an organic light emitting diode; a first transistor configured to control an amount of current supplied from a first power source coupled to a first electrode to a second power source via the organic light emitting diode; a second transistor configured to be turned on when the second control signal is supplied; and a fourth transistor configured to supply an initial voltage to a second electrode of the first transistor when the first control signal is supplied.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: November 4, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Yong Chung, Yong-Sung Park
  • Patent number: 8866859
    Abstract: A scan driver may include: a first scan driving block, outputting a second clock signal to a first output terminal according to an input signal, in synchronization with a first clock signal; and a second scan driving block, outputting the first clock signal according to the output signal of the first scan driving block to a second output terminal, in synchronization with the second clock signal, wherein the first scan driving block and the second scan driving block simultaneously output an entire clock signal, according to a level of a simultaneous light emission control signal.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: October 21, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Yong Chung, Dong-Beom Lee
  • Patent number: 8854347
    Abstract: An organic light emitting display device for improving the yield and for reducing or minimizing manufacturing costs. The organic light emitting display device includes: a data driver coupled to data lines that are formed on the panel; a scan driver mounted on the panel and coupled to scan lines that are formed on the panel; input lines for receiving clock signals from the outside; first connecting lines overlapped with a cathode electrode and electrically coupled to the input lines and for supplying the clock signals to the scan driver; second connecting lines electrically coupled to the input lines; and third connecting lines for electrically coupling the first connecting lines to the second connecting lines.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: October 7, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Sung Park, Chul-Kyu Kang, Dong-Wook Park, Bo-Yong Chung
  • Patent number: 8854353
    Abstract: A scan driver and a display device including the same. The scan driver includes a plurality of shift registers including an input signal terminal into which an initial signal or an output signal of a previous stage is inputted, two clock signal terminals to which 2 phase clock signals are transferred, two control signal terminals to which a first control signal and a second control signal controlling a driving mode of simultaneously driving or sequentially driving output signals of all stages are transferred, and output signals terminals from which the output signals are outputted, wherein in the sequential driving mode, the first control signal and the second control signal are transferred as a predetermined first level voltage and in the simultaneous driving mode, the first control signal and the second control signal are transferred alternately as the first level voltage and a predetermined second level voltage.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: October 7, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Bo-Yong Chung
  • Patent number: 8823628
    Abstract: A scan driving circuit that generates a plurality of scan signals overlapping with each other by h horizontal cycles, that is driven by using (2h+2) clock signals, and that includes a small number of transistors, where h denotes a natural number less than or equal to n?1 and n is an integer greater than “4.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: September 2, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Bo-Yong Chung