Patents by Inventor Dong Yeung Kwak

Dong Yeung Kwak 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: 6970221
    Abstract: A liquid crystal display device and a method of fabricating the same that is capable of speeding up a data charge time in a liquid crystal pixel cell in a liquid crystal display device with a high aperture ratio overlapping a pixel electrode and a signal wiring. In the device, a thickness and a dielectric constant of the organic insulating film are set such that a signal delay at the gate line and the data line can be reduced.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: November 29, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Kwang Seop Park, Dong Yeung Kwak, Jae Young Chung
  • Patent number: 6917394
    Abstract: An array substrate of the present invention includes a storage capacitor that has a storage-on-gate structure. One embodiment of the present invention discloses the array substrate having a metal island pattern on the substrate beneath a drain electrode. The metal island pattern is disposed beneath a drain contact hole through which a pixel electrode contacts the drain electrode. Since the metal island pattern has the same thickness as the gate line, the passivation layer can have the same height both in a drain region and in a storage region. Over-etching is minimized with the passivation layer in the drain and storage region having the same uniform thickness.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: July 12, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Sang-Moo Song, Dong-Yeung Kwak, Se-Il Sohn
  • Publication number: 20050140910
    Abstract: A liquid crystal display panel includes first and second substrates attached to each other by a seal pattern, the seal pattern being outside of a display region, a liquid crystal layer between the first and second substrates in the display region, a silver dot outside the seal pattern for electrically connecting the first substrate to the second substrate, and a first line-on-glass line and a second line-on-glass line on the first substrate outside the display region, the first line-on-glass line is completely in a pad region outside of the silver dot.
    Type: Application
    Filed: December 27, 2004
    Publication date: June 30, 2005
    Inventors: Dong-Yeung Kwak, Wang-Seob Kil
  • Patent number: 6906760
    Abstract: A liquid crystal display device includes a substrate, a thin film transistor disposed on the substrate, the thin film transistor including a gate electrode, a source electrode and a drain electrode, a gate line arranged in a first direction on the substrate, the gate line connected with the gate electrode of the thin film transistor, a gate insulation layer disposed on the substrate and covering the gate line and the gate electrode of the thin film transistor, an intrinsic semiconductor layer disposed on the gate insulation layer, an extrinsic semiconductor layer disposed on the intrinsic semiconductor layer, a data line arranged in a second direction substantially perpendicular to the first direction disposed on the extrinsic semiconductor layer, the data line connected to the source electrode of the thin film transistor, first and second dummy metal layers formed over the gate line and arranged on opposite sides of the data line, a passivation layer covering the data line, the source electrode, the drain el
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: June 14, 2005
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Soon-Sung Yoo, Dong-Yeung Kwak, Hu-Sung Kim, Yu-Ho Jung, Yong-Wan Kim, Duk-Jin Park, Woo-Chae Lee
  • Patent number: 6900860
    Abstract: A liquid crystal display (LCD) panel that has even luminance with high picture quality is disclosed. The LCD panel includes a first substrate provided with a plurality of gate and data lines, the gate lines being arranged to cross the data lines to define a plurality of pixel regions in a matrix arrangement; a second substrate provided with a black matrix layer to shield portions other than the pixel region from light; and a liquid crystal layer injected between the first and second substrates, wherein the pixel regions at a surrounding portion have an aperture ratio lower than that of the pixel regions at the other portions.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: May 31, 2005
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Yong Ik Bang, Dong Yeung Kwak, Sung Il Park
  • Patent number: 6891579
    Abstract: An LCD panel and a method for manufacturing the same is disclosed, in which light leakage is prevented from occurring by forming a dummy pattern in an array peripheral region. The LCD panel includes a first substrate having an array region and an array peripheral region, a gate line on the first substrate, a gate insulating film on the entire surface of the first substrate including the gate line, a data line arranged to cross the gate line for defining a pixel region on the array region, a light leakage prevention film formed between the gate and/or data lines of the array peripheral region for preventing light leakage in the panel, and a TFT and a pixel electrode formed in each pixel region.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: May 10, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Dong Yeung Kwak, Ki Tae Kim
  • Patent number: 6876428
    Abstract: A gray tone mask, which is patterned and used in a photolithographic manufacturing process wherein a plurality of thin films are deposited and patterned on a substrate, said mask having different gaps in the vertical and horizontal directions so that the quantity of light which passes the patterned mask and irradiated on the photosensitive material is controlled depending on the direction of light irradiated from an exposing apparatus; and a method of manufacturing a TFT of a LCD using just four masks.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: April 5, 2005
    Assignee: LG Philips LCD Co., Ltd.
    Inventors: Dong-Yeung Kwak, Sang-Moo Song
  • Patent number: 6864928
    Abstract: A method of fabricating a liquid crystal display device includes the steps of forming a gate electrode on a transparent substrate; forming a gate insulating film, an active layer and an ohmic contact layer on the transparent substrate to cover the gate electrode; forming a source electrode and a drain electrode on the ohmic contact layer and patterning the drain electrode to form an L-shaped portion and a plurality of protrusions; forming a protective layer on the source and drain electrodes such that side surfaces of the protective layer, the drain electrode, the ohmic contact layer and the active layer are exposed; and forming a pixel electrode on the protective layer to electrically contact the side surface of the drain electrode.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: March 8, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Soon Sung Yoo, Dong Yeung Kwak, Hu Sung Kim, Yong Wan Kim, Dug Jin Park, Yu Ho Jung, Woo Chae Lee
  • Patent number: 6861297
    Abstract: A liquid crystal display device and a fabricating method thereof wherein an adhesive force between a seal and a lower plate is improved upon bonding of an upper plate to the lower plate. In high aperture liquid crystal display panels, organic protective films are used to reduce dielectric constants. However, the seal, used when bonding the upper and lower plates of the liquid crystal panel, generally do not adhere well to organic materials. In this invention, holes are generated in the organic protective film so that the seal bonds with inorganic materials such as the lower glass plate or the gate insulating film. A method is also presented to precisely control the amount of the gate insulating film to be etched using the EPD window technique.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: March 1, 2005
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Dong Yeung Kwak, Gun Hee Lee
  • Patent number: 6862069
    Abstract: A liquid crystal display device includes dummy patterns formed between gate links and between data links. The gate links and data links are coated with a sealant to obtain the same height as a liquid crystal area at the opposite side thereof through the dummy patterns, providing a uniform cell gap.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: March 1, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Dong Yeung Kwak, Soon Sung Yoo, Yu Ho Jung, Hu Sung Kim, Dug Jin Park, Yong Wan Kim, Woo Chae Lee
  • Patent number: 6839096
    Abstract: A liquid crystal display device with a repair structure that facilitates repair of a short circuit or an open circuit. In the device, a gate line is formed on an insulating substrate and a gate electrode is integral to the gate line. A semiconductor layer is formed on the gate electrode with having an insulating film therebetween. A data line is crossed with the gate electrode, and a source electrode is integral to the data line on the semiconductor layer and the gate electrode. A drain electrode is spaced oppositely the source electrode. A protective film has a first contact hole at the drain electrode. A pixel electrode is formed on the protective film and is connected, via the contact hole, to the drain electrode. The pixel electrode has an area overlapped partially with the data line and is spaced from the gate line by a desired length (?) at one or more corners thereof.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: January 4, 2005
    Assignee: L.G. Phillips LCD Co., Ltd.
    Inventors: Woo Nam Jeong, Ki Tae Kim, Dong Yeung Kwak
  • Publication number: 20040261589
    Abstract: A method for cutting a liquid crystal display panel includes forming a first scribe line along attached first and second mother substrates to form a first region having a plurality of first-sized LCD panels and a first edge of the first region and to form a second region having a plurality of second-sized LCD panels and a first edge of the second region, separating the plurality of first-sized LCD panels formed at the first region into individual first-sized LCD panels, and separating the plurality of second-sized LCD panels formed at the second region into individual second-sized LCD panels.
    Type: Application
    Filed: June 1, 2004
    Publication date: December 30, 2004
    Applicant: LG.Philips LCD Co., Ltd.
    Inventors: Dong-Yeung Kwak, Seung-Chan Shin, Suuh-Ho Hong, Wang-Seob Kil
  • Publication number: 20040209405
    Abstract: A liquid crystal display device is provided wherein an adhesive force between a seal and a lower plate is improved upon bonding of an upper plate to the lower plate. In high aperture liquid crystal display panels, organic protective films are used to reduce dielectric constants. However, the seal, used when bonding the upper and lower plates of the liquid crystal panel, generally do not adhere well to organic materials. In this invention, holes are generated in the organic protective film so that the seal bonds with inorganic materials such as the lower glass plate or the gate insulating film.
    Type: Application
    Filed: May 14, 2004
    Publication date: October 21, 2004
    Applicant: LG. Philips LCD Co., Ltd.
    Inventors: Dong Yeung Kwak, Gun Hee Lee
  • Patent number: 6803983
    Abstract: A liquid crystal display device, and a fabricating method thereof, with improved bonding of an upper plate to a lower plate. The lower plate includes an organic protective film over an inorganic gate insulating layer that is on a substrate. Channels through the organic protective film expose either metal patterns or the gate insulating layer. A seal coated with a sealant is then placed over the organic protective film and channels. The sealant passes through the channels to the metal patterns or to the gate insulating layer. Bonding of the seal to the lower plate is improved by the sealant that contacts the metal patterns and/or the gate insulating layer. During LCD fabrication, the metal patterns act as etch stops when etching the channels. Alternatively, an etch stop semiconductor layer is placed on the gate insulating film. The etch stops prevent the etching process from exposing the lower substrate.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: October 12, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Dong Yeung Kwak, Kwang Seop Park
  • Patent number: 6798477
    Abstract: A liquid crystal display device and a method of fabricating the same are disclosed in the present invention. More specifically, the method includes the steps forming a gate line on the first substrate sequentially forming a first insulating layer, an amorphous silicon layer, and a metal layer on the first substrate, patterning the metal layer to form a data line, forming a second insulating layer on the data line, patterning the second insulating layer and the amorphous silicon layer to form a passivation layer and an active layer, respectively, forming a pixel electrode at a pixel region defined by the gate and data lines, assembling the first substrate and the second substrate having a black matrix thereon, wherein the black matrix vertically overlaps at least one boundary line defined by different exposures during step-and-repeat exposure processes; and forming a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: September 28, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Soon-Sung Yoo, Dong-Yeung Kwak, Hu-Sung Kim, Yu-Ho Jung, Yong-Wan Kim, Duk-Jin Park, Woo-Chae Lee
  • Patent number: 6787270
    Abstract: A photo mask for patterning a lightning rod includes a shorting bar pattern and a plurality of pad patterns, an outer lightning rod pattern connected to the shorting bar pattern, an inner lightning rod pattern connected to the pad pattern, projections from each of the outer and inner lightning rod patterns, and a fine pattern in a “” shape connected between the projections, or a redundancy fine pattern connected between the pad patterns, or a plurality of the lightning rod patterns connected in series, thereby protecting the photo mask for patterning a lightning rod from damage from static electricity, and permitting patterning of an accurate lightning rod.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: September 7, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Soon Sung Yoo, Seong Su Lee, Dong Yeung Kwak, Yong Wan Kim
  • Publication number: 20040145686
    Abstract: A liquid crystal display device and a method of fabricating the same are disclosed in the present invention. More specifically, the method includes the steps forming a gate line on the first substrate sequentially forming a first insulating layer, an amorphous silicon layer, and a metal layer on the first substrate, patterning the metal layer to form a data line, forming a second insulating layer on the data line, patterning the second insulating layer and the amorphous silicon layer to form a passivation layer and an active layer, respectively, forming a pixel electrode at a pixel region defined by the gate and data lines, assembling the first substrate and the second substrate having a black matrix thereon, wherein the black matrix vertically overlaps at least one boundary line defined by different exposures during step-and-repeat exposure processes; and forming a liquid crystal layer between the first and second substrates.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 29, 2004
    Applicant: LG. PHILIPS LCD CO., LTD.
    Inventors: Soon-Sung Yoo, Dong-Yeung Kwak, Hu-Sung Kim, Yu-Ho Jung, Yong-Wan Kim, Duk-Jin Park, Woo-Chae Lee
  • Patent number: 6760092
    Abstract: An array substrate for use in a liquid crystal display device is fabricated by the steps of forming a first metal layer on a substrate, patterning the first metal layer to form a gate line, a gate electrode, a gate pad, a first shorting bar, and a second shorting bar, forming a gate insulation layer, a pure amorphous silicon layer, a doped amorphous silicon layer and a second metal layer to cover the patterned first metal layer, patterning the second metal layer and the doped amorphous silicon layer to form first, second and third through-holes and first and second grooves to expose a portion of the pure amorphous silicon layer, the first and second grooves creating an isolated portions of the second metal layer, forming a passivation layer to cover the patterned second metal layer, forming a source electrode, a drain electrode, a data line, a data pad, an insulating segment, and first, second and third contact holes, and forming a pixel electrode, a first connector and a second connector of a transparent con
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: July 6, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Soon-Sung Yoo, Dong-Yeung Kwak, Hu-Sung Kim, Yu-Ho Jung, Yong-Wan Kim, Duk-Jin Park, Woo-Chae Lee
  • Publication number: 20040070707
    Abstract: A liquid crystal display (LCD) device and method for manufacturing the same in which a plurality of patterns are formed on one substrate reduces the manufacturing cost and simplifies the process steps by minimizing the number of masks required to form the patterns. The LCD device includes first and second substrates, a thin film transistor (TFT) formed in a predetermined region on the first substrate, a pixel electrode formed in a pixel region on the first substrate, a color filter layer formed on the pixel electrode, a black matrix pattern formed in a region other than the pixel electrode, and a liquid crystal layer formed between the first and second substrates. The method for manufacturing the LCD device having a pixel region defined by gate and data lines, includes the steps of forming a TFT on a first substrate, forming a black matrix pattern in a region other than the pixel region, forming a pixel electrode in the pixel region, and forming a color filter layer on the pixel electrode.
    Type: Application
    Filed: September 16, 2003
    Publication date: April 15, 2004
    Inventors: Byoung Ho Lim, Soon Sung Yoo, Dong Yeung Kwak, Jae Gu Lee
  • Publication number: 20040041959
    Abstract: An array substrate for use in a liquid crystal display device is fabricated by the steps of forming a first metal layer on a substrate, patterning the first metal layer to form a gate line, a gate electrode, a gate pad, a first shorting bar, and a second shorting bar, forming a gate insulation layer, a pure amorphous silicon layer, a doped amorphous silicon layer and a second metal layer to cover the patterned first metal layer, patterning the second metal layer and the doped amorphous silicon layer to form first, second and third through-holes and first and second grooves to expose a portion of the pure amorphous silicon layer, the first and second grooves creating an isolated portions of the second metal layer, forming a passivation layer to cover the patterned second metal layer, forming a source electrode, a drain electrode, a data line, a data pad, an insulating segment, and first, second and third contact holes, and forming a pixel electrode, a first connector and a second connector of a transparent con
    Type: Application
    Filed: September 2, 2003
    Publication date: March 4, 2004
    Applicant: LG. PHILIPS LCD CO., LTD.
    Inventors: Soon-Sung Yoo, Dong-Yeung Kwak, Hu-Sung Kim, Yu-Ho Jung, Yong-Wan Kim, Duk-Jin Park, Woo-Chae Lee