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: 7232702
    Abstract: An organic electroluminescent device includes first and second substrates facing and spaced apart from each other; a gate line on an inner surface of the first substrate; a semiconductor layer over the gate line, the semiconductor layer overlying a surface of the first substrate; a data line crossing the gate line; a data ohmic contact layer under the data line, the data ohmic contact layer having the same shape as the data line; a power line parallel to, or substantially parallel to, and spaced apart from the data line, the power line including the same material as the gate line; a switching thin film transistor connected to the gate line and the data line, the switching thin film transistor using the semiconductor layer as a switching active layer; a driving thin film transistor connected to the switching thin film transistor and the power line, the driving thin film transistor using the semiconductor layer as a driving active layer; a connection pattern connected to the driving thin film transistor, the co
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: June 19, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae-Yong Park, Kwang-Jo Hwang
  • Patent number: 7231711
    Abstract: A packaging structure of a driving circuit for a liquid crystal display device comprises a base film, a plurality of first metal lines being formed on the base film and being disposed with a certain distance between neighboring first metal lines, an insulating film on the first metal lines, the insulating film exposing both ends of the first metal lines, and a plurality of second metal lines on the insulating film, the second metal lines being formed parallel to the first metal lines.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: June 19, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Kwang-Jo Hwang, Woo-Hyun Kim
  • Patent number: 7125757
    Abstract: An advantage of the present invention is to provide a method of manufacturing an array substrate for a liquid crystal display device in which a mask that has double slits in it is used in the photolithographic masking process for the pixel electrode to reduce the distance between a pixel electrode and a neighboring pixel electrode and thus reduce the width of a data line, which results in an improvement of the aperture ratio.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: October 24, 2006
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Kwang-Jo Hwang, Woo-Hyun Kim
  • Publication number: 20060121369
    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: Application
    Filed: January 25, 2006
    Publication date: June 8, 2006
    Inventor: Kwang-Jo Hwang
  • Publication number: 20060071216
    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: Application
    Filed: November 28, 2005
    Publication date: April 6, 2006
    Inventor: Kwang-Jo Hwang
  • Patent number: 7018750
    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: October 3, 2003
    Date of Patent: March 28, 2006
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Kwang-Jo Hwang
  • Patent number: 6995047
    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 is an exposure mask when forming the channel.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: February 7, 2006
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Kwang-Jo Hwang
  • Patent number: 6984847
    Abstract: An organic electroluminescent device includes first and second substrates facing and spaced apart from each other; a gate line on an inner surface of the first substrate; a semiconductor layer over the gate line, the semiconductor layer overlying a surface of the first substrate; a data line crossing the gate line; a data ohmic contact layer under the data line, the data ohmic contact layer having the same shape as the data line; a power line parallel to, or substantially parallel to, and spaced apart from the data line, the power line including the same material as the gate line; a switching thin film transistor connected to the gate line and the data line, the switching thin film transistor using the semiconductor layer as a switching active layer; a driving thin film transistor connected to the switching thin film transistor and the power line, the driving thin film transistor using the semiconductor layer as a driving active layer; a connection pattern connected to the driving thin film transistor, the co
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: January 10, 2006
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae-Yong Park, Kwang-Jo Hwang
  • Publication number: 20050269967
    Abstract: An organic electroluminescent device includes first and second substrates facing and spaced apart from each other; a gate line on an inner surface of the first substrate; a semiconductor layer over the gate line, the semiconductor layer overlying a surface of the first substrate; a data line crossing the gate line; a data ohmic contact layer under the data line, the data ohmic contact layer having the same shape as the data line; a power line parallel to, or substantially parallel to, and spaced apart from the data line, the power line including the same material as the gate line; a switching thin film transistor connected to the gate line and the data line, the switching thin film transistor using the semiconductor layer as a switching active layer; a driving thin film transistor connected to the switching thin film transistor and the power line, the driving thin film transistor using the semiconductor layer as a driving active layer; a connection pattern connected to the driving thin film transistor, the co
    Type: Application
    Filed: August 16, 2005
    Publication date: December 8, 2005
    Inventors: Jae-Yong Park, Kwang-Jo Hwang
  • Publication number: 20050242718
    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: April 29, 2005
    Publication date: November 3, 2005
    Applicant: LG.PHILIPS LCD CO. LTD.
    Inventors: In-Jae Chung, Ki-Yong Kim, Chang-Wook Han, Kwang-Jo Hwang
  • Publication number: 20050139834
    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: Application
    Filed: June 28, 2004
    Publication date: June 30, 2005
    Inventors: Jac-Yong Park, Kwang-Jo Hwang, Ock-Hee Kim
  • Publication number: 20050083742
    Abstract: A packaging structure of a driving circuit for a liquid crystal display device comprises a base film, a plurality of first metal lines being formed on the base film and being disposed with a certain distance between neighboring first metal lines, an insulating film on the first metal lines, the insulating film exposing both ends of the first metal lines, and a plurality of second metal lines on the insulating film, the second metal lines being formed parallel to the first metal lines.
    Type: Application
    Filed: November 12, 2004
    Publication date: April 21, 2005
    Inventors: Kwang-Jo Hwang, Woo-Hyun Kim
  • Patent number: 6876406
    Abstract: A method for manufacturing an LCD device having gate and data lines includes forming an active layer on an insulating substrate; forming a gate insulating layer over a surface of the insulating substrate including the active layer; forming a gate line and a gate electrode on the gate insulating layer, so that the gate electrode is positioned above the active layer; forming a photoresist pattern on the gate electrode and on the gate line where the gate and the data lines cross each other, wherein, the photoresist pattern surrounds the gate electrode and the gate line; forming source and drain regions in the active layer by injecting impurity ions into the active layer using the photoresist pattern as a mask; removing the photoresist pattern; forming an insulating interlayer over the entire surface of the insulating substrate, the insulating interlayer having first contact holes exposing predetermined portions of the source and drain regions; forming a data line electrically connected to the source region and c
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: April 5, 2005
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: Kwang Jo Hwang
  • Patent number: 6856361
    Abstract: A liquid crystal display according to the present invention uses an organic layer treated with H2 plasma before fabricating an inorganic layer on the top of the organic layer. When forming thin film transistors (TFT) used in the LCD, an Indium Tin Oxide layer is fabricated above the TFTs and acts as a pixel electrode. When the organic layer, such as a passivation layer, is treated with the H2 plasma, an intermediate layer having an O—H bonding structure is formed to enhance bonding or attachment of an inorganic layer, such as an ITO layer, to the organic layer.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: February 15, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Woong-Kwon Kim, Jae-Beom Choi, Sung-Sik Bae, Kwang-Jo Hwang
  • Patent number: 6835896
    Abstract: A packaging structure of a driving circuit for a liquid crystal display device includes a base film, a plurality of first metal lines formed on the base film and arranged to have a certain distance between neighboring first metal lines, an insulating film on the first metal lines, wherein the insulating film exposes both ends of the first metal lines, a plurality of second metal lines on the insulating film, wherein the second metal lines are formed parallel to the first metal lines and an overcoat layer on the second metal lines and exposing ends of the first and second metal lines.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: December 28, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Kwang-Jo Hwang, Woo-Hyun Kim
  • Publication number: 20040135520
    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, the power supply line made of the same material as the gate line, the power supply line having a power supply link line near a crossing portion of the gate line and the power supply line, a switching thin film transistor at a crossing portion of the gate and data lines, the switching thin film transistor including a first semiconductor layer made of amorphous silicon, a driving thin film transistor at a crossing portion of the switching thin film transistor and the power supply line, the driving thin film transistor including a second semiconductor layer made of amorphous silico
    Type: Application
    Filed: December 23, 2003
    Publication date: July 15, 2004
    Applicant: LG.PHILIPS LCD CO., LTD.
    Inventors: Jae-Yong Park, Kwang-Jo Hwang
  • Publication number: 20040129936
    Abstract: An organic electroluminescent device includes first and second substrates facing and spaced apart from each other; a gate line on an inner surface of the first substrate; a semiconductor layer over the gate line, the semiconductor layer overlying a surface of the first substrate; a data line crossing the gate line; a data ohmic contact layer under the data line, the data ohmic contact layer having the same shape as the data line; a power line parallel to, or substantially parallel to, and spaced apart from the data line, the power line including the same material as the gate line; a switching thin film transistor connected to the gate line and the data line, the switching thin film transistor using the semiconductor layer as a switching active layer; a driving thin film transistor connected to the switching thin film transistor and the power line, the driving thin film transistor using the semiconductor layer as a driving active layer; a connection pattern connected to the driving thin film transistor, the co
    Type: Application
    Filed: December 22, 2003
    Publication date: July 8, 2004
    Applicant: LG.Philips LCD. Co., Ltd.
    Inventors: Jae-Yong Park, Kwang-Jo Hwang
  • Publication number: 20040076894
    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: Application
    Filed: October 3, 2003
    Publication date: April 22, 2004
    Applicant: LG. Philips LCD Co., Ltd.
    Inventor: Kwang-Jo Hwang
  • Publication number: 20040041956
    Abstract: A method for manufacturing an LCD device having gate and data lines includes forming an active layer on an insulating substrate; forming a gate insulating layer over a surface of the insulating substrate including the active layer; forming a gate line and a gate electrode on the gate insulating layer, so that the gate electrode is positioned above the active layer; forming a photoresist pattern on the gate electrode and on the gate line where the gate and the data lines cross each other, wherein, the photoresist pattern surrounds the gate electrode and the gate line; forming source and drain regions in the active layer by injecting impurity ions into the active layer using the photoresist pattern as a mask; removing the photoresist pattern; forming an insulating interlayer over the entire surface of the insulating substrate, the insulating interlayer having first contact holes exposing predetermined portions of the source and drain regions; forming a data line electrically connected to the source region and c
    Type: Application
    Filed: April 25, 2003
    Publication date: March 4, 2004
    Applicant: LG.Philips LCD Co., Ltd.
    Inventor: Kwang Jo Hwang
  • Patent number: 6695955
    Abstract: A method of forming polycrystalline silicon for a liquid crystal display device is disclosed in the present invention. The method includes forming an amorphous silicon layer on a substrate, forming a plurality of catalytic metal clusters on the amorphous silicon layer, forming a catalytic metal gettering layer adjacent to the amorphous silicon layer, and heat-treating the substrate including the amorphous silicon layer to transform the amorphous silicon layer into a polycrystalline silicon layer, wherein unreacted catalytic metal clusters migrate to the catalytic metal gettering layer in a direction perpendicular to the substrate.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: February 24, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Kwang Jo Hwang, Binn Kim, Hae Yeol Kim, Jong Uk Bae