Patents by Inventor Sei-Hyoung Jo

Sei-Hyoung Jo 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: 8487843
    Abstract: A display device and a method of driving the display device are provided. The threshold voltage of a driving transistor is compensated such that even when the threshold voltage of the driving transistor is varied, the emission of light with respect to a predetermined data voltage occurs with a predetermined luminance, based on a diode-connected compensation transistor and a plurality of switching transistors.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: July 16, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joon-Chul Goh, Chong-Chul Chai, Young-Soo Yoon, Sei-Hyoung Jo
  • Patent number: 8368828
    Abstract: A liquid crystal display device includes; a plurality of data lines disposed on a substrate, a plurality of gate lines disposed substantially perpendicular to the data lines, wherein the data lines and the gate lines together surround a plurality of pixel regions, a plurality of power supplying lines disposed substantially parallel to the data lines, a plurality of pixel electrode pairs, wherein each of the pixel electrode pairs includes a first and a second pixel electrode respectively disposed in each pixel region, and a pixel driving circuit including at least one transistor and a plurality of storage capacitors in each pixel region, wherein the pixel electrode pairs have portions where the pixel electrode pairs and at least one of the plurality of data lines and the plurality of power supplying lines are vertically aligned with each other, and the storage capacitors are disposed at the vertically aligned portions.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: February 5, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Mee-hye Jung, Dong-gyu Kim, Seung-soo Baek, Kwang-chul Jung, Sei-hyoung Jo, Hye-seok Na
  • Patent number: 8314758
    Abstract: Embodiments of the present invention relate to a display device. In an embodiment, the display device includes a scanning signal line for transferring a scanning signal, a data line crossing the scanning signal line and transferring a data voltage, a switching transistor connected to the scanning signal line and the data line, a driving transistor connected to the switching transistor, a first transistor connected between the driving transistor and a driving voltage terminal, and a light-emitting element connected between the driving transistor and a common voltage terminal. The first transistor operates in a saturation region, and the driving transistor operates in a linear region. In this way, display characteristics may be improved by reducing deviation of a driving current due to deviation of characteristics of a driving transistor or a driving voltage.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: November 20, 2012
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joon-Chul Goh, Chong-Chul Chai, Young-Soo Yoon, Sei-Hyoung Jo
  • Patent number: 8284149
    Abstract: An output part outputs a high voltage of a first clock signal as a high voltage of an (m)-th gate signal (‘m’ is a natural number) and a low voltage in response to a high signal of an (m+1)-th gate signal outputted from an (m+1)-th stage. A first maintenance part maintains a control part of the pull-up part at a low voltage in response to an (m?1)-th node signal or an (m+1)-th node signal lower than a high signal of a second clock signal having a phase opposite to the phase of the first clock signal received from an (m?1)-th stage or the (m+1)-th stage. A second maintenance part maintains the low voltage of the (m)-th gate signal in response to the (m?1)-th node signal or the (m+1)-th node signal.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: October 9, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soo-Wan Yoon, Joon-Chul Goh, Chong-Chul Chai, Young-Soo Yoon, Sei-Hyoung Jo
  • Patent number: 8259249
    Abstract: A display substrate includes a first pixel electrode and a second pixel electrode. The first pixel electrode includes a plurality of first electrode bars. A data line provides a data voltage to the first pixel electrode. The second pixel electrode includes a plurality of second electrode bars alternately disposed with the first electrode bars. A first power line is formed adjacent to a gate line to provide a first voltage to the second pixel electrode. A second power line crosses the first power line and is electrically connected to the first power line. A first switching element is electrically connected to the data line, the gate line and the first pixel electrode. A second switching element is electrically connected to the first power line, the gate line and the second pixel electrode.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: September 4, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-Gyu Kim, Seung-Soo Baek, Mee-Hye Jung, Dong-Hyeon Ki, Sei-Hyoung Jo, Hye-Seok Na
  • Publication number: 20110085100
    Abstract: A display substrate includes a first pixel electrode and a second pixel electrode. The first pixel electrode includes a plurality of first electrode bars. A data line provides a data voltage to the first pixel electrode. The second pixel electrode includes a plurality of second electrode bars alternately disposed with the first electrode bars. A first power line is formed adjacent to a gate line to provide a first voltage to the second pixel electrode. A second power line crosses the first power line and is electrically connected to the first power line. A first switching element is electrically connected to the data line, the gate line and the first pixel electrode. A second switching element is electrically connected to the first power line, the gate line and the second pixel electrode.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 14, 2011
    Inventors: Dong-Gyu KIM, Seung-Soo Baek, Mee-Hye Jung, Dong-Hyeon Ki, Sei-Hyoung Jo, Hye-Seok Na
  • Publication number: 20100328279
    Abstract: A liquid crystal display device includes; a plurality of data lines disposed on a substrate, a plurality of gate lines disposed substantially perpendicular to the data lines, wherein the data lines and the gate lines together surround a plurality of pixel regions, a plurality of power supplying lines disposed substantially parallel to the data lines, a plurality of pixel electrode pairs, wherein each of the pixel electrode pairs includes a first and a second pixel electrode respectively disposed in each pixel region, and a pixel driving circuit including at least one transistor and a plurality of storage capacitors in each pixel region, wherein the pixel electrode pairs have portions where the pixel electrode pairs and at least one of the plurality of data lines and the plurality of power supplying lines are vertically aligned with each other, and the storage capacitors are disposed at the vertically aligned portions.
    Type: Application
    Filed: May 7, 2010
    Publication date: December 30, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Mee-hye JUNG, Dong-gyu KIM, Seung-soo BAEK, Kwang-chul JUNG, Sei-hyoung JO, Hye-seok NA
  • Publication number: 20100164928
    Abstract: Embodiments of the present invention operate at least two microshutter electrodes with different voltages from each other for displaying grays. Also, a data voltage is applied to the microshutter electrodes after an initialization voltage when the display device has hysteresis characteristics such that erroneous operation due to the hysteresis characteristics is eliminated. As described herein, the display device including the microshutter electrodes may display subdivided grays.
    Type: Application
    Filed: July 16, 2009
    Publication date: July 1, 2010
    Inventors: Kyoung-Ju Shin, Chong-Chul Chai, Sei-Hyoung Jo
  • Publication number: 20100123697
    Abstract: A display device and a method of driving the display device are provided. The threshold voltage of a driving transistor is compensated such that even when the threshold voltage of the driving transistor is varied, the emission of light with respect to a predetermined data voltage occurs with a predetermined luminance, based on a diode-connected compensation transistor and a plurality of switching transistors.
    Type: Application
    Filed: May 19, 2009
    Publication date: May 20, 2010
    Inventors: Joon-Chul Goh, Chong-Chul Chai, Young-Soo Yoon, Sei-Hyoung Jo
  • Publication number: 20100110047
    Abstract: An output part outputs a high voltage of a first clock signal as a high voltage of an (m)-th gate signal (‘m’ is a natural number) and a low voltage in response to a high signal of an (m+1)-th gate signal outputted from an (m+1)-th stage. A first maintenance part maintains a control part of the pull-up part at a low voltage in response to an (m?1)-th node signal or an (m+1)-th node signal lower than a high signal of a second clock signal having a phase opposite to the phase of the first clock signal received from an (m?1)-th stage or the (m+1)-th stage. A second maintenance part maintains the low voltage of the (m)-th gate signal in response to the (m?1)-th node signal or the (m+1)-th node signal.
    Type: Application
    Filed: July 23, 2009
    Publication date: May 6, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Soo-Wan YOON, Joon-Chul GOH, Chong-Chul CHAI, Young-Soo YOON, Sei-Hyoung JO
  • Publication number: 20090278831
    Abstract: Embodiments of the present invention relate to a display device. In an embodiment, the display device includes a scanning signal line for transferring a scanning signal, a data line crossing the scanning signal line and transferring a data voltage, a switching transistor connected to the scanning signal line and the data line, a driving transistor connected to the switching transistor, a first transistor connected between the driving transistor and a driving voltage terminal, and a light-emitting element connected between the driving transistor and a common voltage terminal. The first transistor operates in a saturation region, and the driving transistor operates in a linear region. In this way, display characteristics may be improved by reducing deviation of a driving current due to deviation of characteristics of a driving transistor or a driving voltage.
    Type: Application
    Filed: September 29, 2008
    Publication date: November 12, 2009
    Inventors: Joon-Chul GOH, Chong-Chul Chai, Young-Soo Yoon, Sei-Hyoung Jo