Patents by Inventor Kwang-Jo Hwang

Kwang-Jo Hwang 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: 9170426
    Abstract: An array substrate includes: a substrate; first and second gate lines on the substrate; first and second common lines parallel to and spaced apart from the first and second gate lines; first and second data lines crossing the first and second gate lines and the first and second common lines; first and second thin film transistors in the pixel region; a first pixel electrode and a first common electrode alternately disposed in the first area, at least one of the first pixel electrode and the first common electrode having a bent part; and a second pixel electrode and a second common electrode alternately disposed in the second area.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: October 27, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: You-Yong Jin, Kwang-Jo Hwang, Eui-Tae Kim, Seok Kim, Han-Chul Park
  • Patent number: 8939809
    Abstract: A top emission OLED includes a driving TFT including a channel region and source and drain electrodes. A power supply, a ground line, and a light emitting diode are electrically coupled to the TFT and an auxiliary electrode is electrically coupled to the ground line and to the source electrode of the driver transistor. The auxiliary electrode resides between the light emitting diode and the channel region of the driver transistor and is configured to shield the channel region of the driver transistor from an electric field generated by the light emitting diode.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: January 27, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Kwang Jo Hwang, Jae Hee Park
  • Publication number: 20130321721
    Abstract: An array substrate includes: a substrate; first and second gate lines on the substrate; first and second common lines parallel to and spaced apart from the first and second gate lines; first and second data lines crossing the first and second gate lines and the first and second common lines; first and second thin film transistors in the pixel region; a first pixel electrode and a first common electrode alternately disposed in the first area, at least one of the first pixel electrode and the first common electrode having a bent part; and a second pixel electrode and a second common electrode alternately disposed in the second area.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 5, 2013
    Inventors: You-Yong JIN, Kwang-Jo HWANG, Eui-Tae KIM, Seok KIM, Han-Chul PARK
  • Publication number: 20120115260
    Abstract: A top emission OLED includes a driving TFT including a channel region and source and drain electrodes. A power supply, a ground line, and a light emitting diode are electrically coupled to the TFT and an auxiliary electrode is electrically coupled to the ground line and to the source electrode of the driver transistor. The auxiliary electrode resides between the light emitting diode and the channel region of the driver transistor and is configured to shield the channel region of the driver transistor from an electric field generated by the light emitting diode.
    Type: Application
    Filed: January 10, 2012
    Publication date: May 10, 2012
    Inventors: Kwang Jo Hwang, Jae Hee Park
  • Patent number: 8110977
    Abstract: A top emission OLED includes a driving TFT including a channel region and source and drain electrodes. A power supply, a ground line, and a light emitting diode are electrically coupled to the TFT and an auxiliary electrode is electrically coupled to the ground line and to the source electrode of the driver transistor. The auxiliary electrode resides between the light emitting diode and the channel region of the driver transistor and is configured to shield the channel region of the driver transistor from an electric field generated by the light emitting diode.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: February 7, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Kwang Jo Hwang, Jae Hee Park
  • Patent number: 8110418
    Abstract: An organic electroluminescent display device includes a substrate, gate and data lines on the substrate and crossing each other to define a pixel region, a switching element at each crossing point of the gate and data lines, a driving element coupled to the switching element, a field control electrode coupled to the driving element and overlapping a channel of the driving element, and an organic electroluminescent diode coupled to the driving element.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: February 7, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: In-Jae Chung, Ki-Yong Kim, Chang-Wook Han, Kwang-Jo Hwang
  • Patent number: 8071978
    Abstract: An organic electroluminescent device includes first and second substrates spaced apart from and facing each other, an organic electroluminescent diode on an inner surface of the second substrate, a gate line formed on an inner surface of the first substrate in a first direction, a data line formed in a second direction crossing the first direction, a power supply line spaced apart from the data line and formed in the second direction, a switching thin film transistor at a crossing portion of the gate and data lines, a driving thin film transistor at a crossing portion of the switching thin film transistor and the power supply line, a connecting electrode connected to the driving thin film transistor, and an electrical connecting pattern corresponding to the connecting electrode and for electrically connecting the connecting electrode to the organic electroluminescent diode.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: December 6, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Jae-Yong Park, Kwang-Jo Hwang
  • Patent number: 8044426
    Abstract: A light emitting device includes a first substrate and a second substrate. Each substrate may be subdivided into a contact region and a pixel region. Conductive elements positioned in each of the contact region and pixel region of the first substrate may be of substantially the same height.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: October 25, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Kwang Jo Hwang, Hee Dong Choi, Jae Hee Park
  • Publication number: 20100267178
    Abstract: An organic electroluminescent display device includes a substrate, gate and data lines on the substrate and crossing each other to define a pixel region, a switching element at each crossing point of the gate and data lines, a driving element coupled to the switching element, a field control electrode coupled to the driving element and overlapping a channel of the driving element, and an organic electroluminescent diode coupled to the driving element.
    Type: Application
    Filed: June 28, 2010
    Publication date: October 21, 2010
    Inventors: In Jae CHUNG, Ki-Yong Kim, Chang-Wook Han, Kwang-Jo Hwang
  • Patent number: 7768060
    Abstract: An organic electroluminescent display device includes a substrate, gate and data lines on the substrate and crossing each other to define a pixel region, a switching element at each crossing point of the gate and data lines, a driving element coupled to the switching element, a field control electrode coupled to the driving element and overlapping a channel of the driving element, and an organic electroluminescent diode coupled to the driving element.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: August 3, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: In-Jae Chung, Ki-Yong Kim, Chang-Wook Han, Kwang-Jo Hwang
  • Patent number: 7755578
    Abstract: An organic light emitting diode display device and a driving method are provided. The organic light emitting diode display device comprises a data driver that generates a plurality of reference data voltages that have a level proportional to a gray scale level of a digital data supplied from the timing controller. The data driver supplies the data voltages to the plurality of data lines and compensates for the data voltages in accordance with a magnitude of the feedback voltages from the plurality of pixels fed back through the plurality of feedback lines under control of the timing controller.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: July 13, 2010
    Assignee: LG. Display Co., Ltd.
    Inventors: Jae Yong Park, Kwang Jo Hwang, Jong Woo Park, Hee Dong Choi, Sang Ho Yu, Jin Hyoung Kim
  • Patent number: 7671530
    Abstract: Provided are an organic electroluminescence display device and method of fabricating the same. An organic electroluminescence display device according to the present invention includes a first substrate; a plurality of data lines arranged in a first direction on the first substrate; a plurality of gate lines arranged in a second direction on the first substrate; a plurality of pixel regions defined by the gate lines and the data lines, wherein a first pixel line is defined as a line of the pixel regions arranged in the first direction and a second pixel line is defined as a line of the pixel regions arranged in the second direction; a thin film transistor in each pixel region; a plurality of first connecting lines electrically connecting the thin film transistors of the first pixel lines with each other; and a second connecting line electrically connecting the thin film transistor of at least one of the second pixel lines.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 2, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Jae Yong Park, Kwang Jo Hwang, Jong Woo Park, Hee Dong Choi, Sang Ho Yu, Jin Hyoung Kim
  • Patent number: 7663143
    Abstract: A mask containing apertures therein which is used for fabricating a channel of a thin film transistor (TFT), wherein the pixel charging time for a TFT in a high-resolution liquid crystal display (LCD) device is reduced by minimizing the length of the channel in the TFT when the active region is made of amorphous silicon. The length of the channel can be minimized by exposing light through the apertures in an exposure mask when forming the channel.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: February 16, 2010
    Assignee: LG Display Co., Ltd.
    Inventor: Kwang-Jo Hwang
  • Patent number: 7625823
    Abstract: In a method of manufacturing a metal pattern, a metal layer is deposited on a passivation layer, and a photoresist pattern is then formed on the metal layer. Using the photoresist pattern as a mask, an exposed portion of the metal layer is treated with a plasma to lower a binding force in the metal. The metal layer is then etched to form a the metal pattern. The method is applicable to the formation of pixel electrodes in LCD devices.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: December 1, 2009
    Assignee: LG Display Co., Ltd.
    Inventor: Kwang-Jo Hwang
  • Patent number: 7522224
    Abstract: An array substrate of a liquid crystal device has a plurality of gate lines, data lines, pixel areas, and thin film transistors, wherein the gate lines are formed from a material of a first and second metal layer, and wherein the first metal layer of the gate line is extended on the pixel area. Also, a display device has first and second gate lines and a data line on a substrate, a thin film transistor, a pixel electrode, a first storage electrodes extending from the second gate line and wherein at least one of the first and second gate lines and the data line includes first and second line layers respectively formed of an oxidized metal later and a metal layer.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: April 21, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Kwang Jo Hwang, Woo Hyun Kim, Se Jung Kim
  • Patent number: 7481880
    Abstract: A method of crystallizing amorphous silicon includes forming an amorphous silicon layer on a substrate, placing a mask over the substrate including the amorphous silicon layer, and applying a laser beam onto the amorphous silicon layer through the mask to form a first crystallized region, the laser beam having an energy intensity high enough to completely melt the amorphous silicon layer, wherein the mask comprises a base substrate, a phase shift layer on the base substrate, having a plurality of first stripes having a first width separated by slits, and a blocking layer overlapping the phase shift layer, having a plurality of second stripes having a second width narrower than the first width, the second stripes being parallel to the first stripes.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: January 27, 2009
    Assignee: LG Display Co., Ltd.
    Inventor: Kwang-Jo Hwang
  • Publication number: 20080158108
    Abstract: A top emission OLED includes a driving TFT including a channel region and source and drain electrodes. A power supply, a ground line, and a light emitting diode are electrically coupled to the TFT and an auxiliary electrode is electrically coupled to the ground line and to the source electrode of the driver transistor. The auxiliary electrode resides between the light emitting diode and the channel region of the driver transistor and is configured to shield the channel region of the driver transistor from an electric field generated by the light emitting diode.
    Type: Application
    Filed: June 22, 2007
    Publication date: July 3, 2008
    Inventors: Kwang Jo Hwang, Jae Hee Park
  • Patent number: 7342249
    Abstract: An organic electroluminescent device, includes: a first substrate including a first pixel region, the first pixel region including first, second and third sub-pixel regions; an array element layer on an inner surface of the first substrate, the array element layer including a thin film transistor in each sub-pixel region; a second substrate facing the first substrate and being spaced apart from the first substrate, the second substrate including a second pixel region corresponding to the first pixel region, and the second pixel region including fourth, fifth and sixth sub-pixel regions; an organic electroluminescent diode on an inner surface of the second substrate in each sub-pixel region; and a connection electrode electrically connecting the first substrate to the second substrates, wherein the fourth, fifth and sixth sub-pixel regions have different sizes from each other.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: March 11, 2008
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jac-Yong Park, Kwang-Jo Hwang, Ock-Hee Kim
  • Publication number: 20070267648
    Abstract: A light emitting device includes a first substrate and a second substrate. Each substrate may be subdivided into a contact region and a pixel region. Conductive elements positioned in each of the contact region and pixel region of the first substrate may be of substantially the same height.
    Type: Application
    Filed: October 26, 2006
    Publication date: November 22, 2007
    Inventors: Kwang Jo Hwang, Hee Dong Choi, Jae Hee Park
  • Patent number: 7256842
    Abstract: An array substrate of a liquid crystal display being capable of increasing the electrostatic capacitance of a storage capacitor without decreasing the aperture ratio of the LCD. In the array substrate, the gate line is formed a disposed material of a first and a second metal layer. The first metal layer of the gate line is extended on the pixel area.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: August 14, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Kwang Jo Hwang, Woo Hyun Kim, Se June Kim