Patents by Inventor Su-Seok Choi

Su-Seok Choi 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: 20040207776
    Abstract: A liquid crystal display device, and a method of fabricating such a liquid crystal display device, that uses a ferroelectric liquid crystal (FLC). Additives are added to the ferroelectric liquid crystal. The additives are then used to form polymer networks, beneficially by exposure to ultraviolet light. Suitable additives include an acrylate compound.
    Type: Application
    Filed: May 19, 2004
    Publication date: October 21, 2004
    Inventors: Suk-Won Choi, Su-Seok Choi
  • Publication number: 20040201802
    Abstract: A transflective liquid crystal display 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 data line crossing the gate line to define a pixel region including a reflective portion and a transmissive portion, wherein the transmissive portion has a polygonal shape inscribed in a rectangle, and a circumference of the transmissive portion is less than the circumference of the rectangle; a thin film transistor connected to the gate line and the data line; a passivation layer on the thin film transistor, the passivation layer having a opening corresponding to the transmissive portion; a reflective layer corresponding to the reflective portion on the passivation layer; a transparent electrode corresponding to the pixel region over the reflective layer; a color filter layer on an inner surface of the second substrate; a common electrode on the color filter layer; and a liquid crystal layer between the common electrode and the
    Type: Application
    Filed: December 30, 2003
    Publication date: October 14, 2004
    Inventors: Kyoung-Su Ha, Mi-Sook Nam, Su-Seok Choi, Sang-Min Jang
  • Patent number: 6798490
    Abstract: The present invention is related to a method of fabricating a ferroelectric liquid crystal display which prevents problems of injecting liquid crystal that result from a volume shrinking of the liquid crystal during the injection process. In the method, the pressure in a chamber is changed to above a liquid crystal injection pressure, while cooling a liquid crystal panel after injecting the liquid crystal, and at the same time, the temperature of a liquid crystal tray maintained at a liquid crystal injection temperature, to continue injection of the liquid crystal to an otherwise un-injected portion of the liquid crystal panel, so that an problems related to inadequate injection can be prevented.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: September 28, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Suk Won Choi, Su Seok Choi
  • Patent number: 6768527
    Abstract: A ferroelectric liquid crystal display and a fabricating method thereof that is capable of maintaining a stable alignment state against external temperature variation and external impact. In the method and apparatus, a ferroelectric liquid crystal containing a small amount of light-hardening polymer is injected between upper and lower substrates provided with alignment film. An ultraviolet ray is irradiated thereon to form a polymer network. The ultraviolet ray has a light intensity range of about 1 to about 5 mW/cm2, and has a light energy range of about 240 to about 1200 mJ/cm2.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: July 27, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Suk Won Choi, Su Seok Choi
  • Publication number: 20040135945
    Abstract: A color filter substrate for a transflective liquid crystal display device includes a substrate having a plurality of pixel regions, each of the plurality of pixel regions having reflective and transmissive portions, a black matrix on the substrate, a buffer layer on the black matrix having a first open portion corresponding to the transmissive portion of the pixel region and a patterned spacer within the reflective portion of the pixel region, a color filter layer on the buffer layer, the color filter layer having a first thickness within the reflective portion of the pixel region and a second thickness within the transmissive portion of the pixel region, and a common electrode on the color filter layer, wherein the buffer layer and the patterned spacer are a single body.
    Type: Application
    Filed: December 23, 2003
    Publication date: July 15, 2004
    Applicant: LG. Philips LCD Co., Ltd.
    Inventors: Su-Seok Choi, Sang-Min Jang
  • Patent number: 6760088
    Abstract: A ferroelectric liquid crystal display having alignment films with different surface polarities. The alignment films induce an internal electric field through the liquid crystal. Because of the induced internal electric field, initial liquid crystal alignment, and subsequent liquid crystal alignments, can be performed without an externally applied electric field.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: July 6, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Suk Won Choi, Su Seok Choi
  • Publication number: 20040125287
    Abstract: A reflective plate used in a liquid crystal display including a substrate, a first peak and depression layer of organic insulator on the substrate, a second peak and depression layer of organic insulator overlapping with the first peak and depression layer, and a reflective layer on the first and second peak and depression layers.
    Type: Application
    Filed: October 22, 2003
    Publication date: July 1, 2004
    Inventors: Sang Min Jang, Su Seok Choi, Hee Yeong Ryu
  • Publication number: 20040124414
    Abstract: An array substrate for a transflective liquid crystal display device includes: a gate line on a substrate; a data line crossing the gate line to define a pixel region having a transmissive portion and a reflective portion; a common line parallel to and spaced apart from the gate line; a thin film transistor connected to the gate and data lines, the thin film transistor including a gate electrode, an active layer, and source and drain electrodes; a capacitor electrode extending from the drain electrode and overlapping the common line; a reflective layer covering the common line and the thin film transistor and corresponding to the reflective portion; and a transparent electrode connected to the drain electrode and disposed in the pixel region.
    Type: Application
    Filed: June 25, 2003
    Publication date: July 1, 2004
    Inventors: Sang-Min Jang, Su-Seok Choi
  • Publication number: 20040125290
    Abstract: A color filter substrate for a transflective liquid crystal display device includes: a substrate having a plurality of pixel regions, each of the plurality of pixel regions having reflective and transmissive portions; a black matrix on the substrate; a buffer layer on the black matrix, the buffer layer having a groove corresponding to the black matrix; a color filter layer on the buffer layer, the color filter layer having a first thickness in the reflective portion and a second thickness in the transmissive portion wherein the first thickness is substantially half of the second thickness, the color filter layer having a step difference at a border between the reflective and transmissive portions; and a common electrode on the color filter layer.
    Type: Application
    Filed: September 22, 2003
    Publication date: July 1, 2004
    Inventors: Mi-Sook Nam, Sang-Min Jang, Su-Seok Choi
  • Patent number: 6757035
    Abstract: A liquid crystal display device, and a method of fabricating such a liquid crystal display device, that uses a ferroelectric liquid crystal (FLC). Additives are added to the ferroelectric liquid crystal. The additives are then used to form polymer networks, beneficially by exposure to ultraviolet light. Suitable additives include an acrylate compound.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: June 29, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Suk-Won Choi, Su-Seok Choi
  • Publication number: 20040119897
    Abstract: A liquid crystal display device includes a plurality of data lines arranged along a first direction on a substrate, a plurality of gate lines arranged a second direction perpendicular to the first direction on the substrate to define a plurality of pixel regions, each of the gate lines having at least one first set of protrusions and depressions, a driving device within each of the pixel regions, a pixel electrode within each of the pixel regions, and a metal layer overlapping each of the gate lines to create a storage capacitor.
    Type: Application
    Filed: June 26, 2003
    Publication date: June 24, 2004
    Applicant: LG.PHILIPS LCD CO., LTD.
    Inventors: Sang-Min Jang, Su-Seok Choi
  • Publication number: 20040119676
    Abstract: The trans-reflective liquid crystal display device of this invention includes a plurality of data and gate lines defining a plurality of pixels, the pixels having a reflection region and a transmission region; a timing controller that receives, converts, and outputs image data; a switching unit that determines the output signal of the timing controller according to a transmission mode or reflection mode; a gate driver that receives a gate signal from the timing controller; a data driver that receives a data signal from the timing controller; a liquid crystal display panel with a TFT array substrate and a color filter substrate, the liquid crystal display panel displaying the image according to a gate pulse and a data voltage applied by the gate driver and the data driver; a sequential backlight including red, green, and blue lamps wherein, the backlight is turned on in a transmission mode to sequentially transmit the light into the transmission region and is turned off in a reflection mode.
    Type: Application
    Filed: December 12, 2003
    Publication date: June 24, 2004
    Inventors: Mi-Sook Nam, Sang-Min Jang, Su-Seok Choi
  • Publication number: 20040109125
    Abstract: A liquid crystal display panel device includes an upper substrate having a plurality of first patterned spacers, and a lower substrate having a plurality of second patterned spacers, wherein the upper and lower substrates are opposed to each other and the first patterned spacers are arternatingly positioned with the second pattern spacers.
    Type: Application
    Filed: June 18, 2003
    Publication date: June 10, 2004
    Applicant: LG.PHILIPS LCD CO., LTD.
    Inventor: Su Seok Choi
  • Patent number: 6741317
    Abstract: A liquid crystal display device includes a thin film transistor substrate, on which a plurality of data lines and gate lines are positioned perpendicular to each other; a plurality of pixel electrodes formed near intersections of the data lines and the gate lines; a color filter substrate positioned parallel to the thin film transistor substrate, including a color filter layer, a black matrix and a common electrode formed thereon; a polymer wall arrangement formed either on the thin film transistor substrate or on the color filter substrate dividing the substrate into a plurality of liquid crystal panels; and at least one liquid crystal injection opening formed on each panel of the plurality of liquid crystal panels.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: May 25, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Su Seok Choi, Suk Won Choi
  • Publication number: 20040070703
    Abstract: A liquid crystal display cell, and a fabricating method thereof, that incorporates a light-cured monomer in a ferroelectric liquid crystal. By injecting the light-cured monomer/ferroelectric liquid crystal between substrate while in a nematic phase or isotropic phase, by performing DC voltage treatments as the liquid crystal temperature decreases, and by performing a light irradiation treatment, a stable, aligned ferroelectric liquid crystal cell is produced. Such a ferroelectric liquid crystal cell can reduce flicker and can be realigned after a physical shock.
    Type: Application
    Filed: October 3, 2003
    Publication date: April 15, 2004
    Inventor: Su Seok Choi
  • Patent number: 6657686
    Abstract: A liquid crystal display cell, and a fabricating method thereof, that incorporates a light-cured monomer in a ferroelectric liquid crystal. By injecting the light-cured monomer/ferroelectric liquid crystal between substrate while in a nematic phase or isotropic phase, by performing DC voltage treatments as the liquid crystal temperature decreases, and by performing a light irradiation treatment, a stable, aligned ferroelectric liquid crystal cell is produced. Such a ferroelectric liquid crystal cell can reduce flicker and can be realigned after a physical shock.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: December 2, 2003
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Su Seok Choi
  • Publication number: 20030179329
    Abstract: An array substrate for a reflective liquid crystal display device includes a substrate; a first organic layer on the substrate, the first organic layer having a plurality of organic patterns of uneven shape, the plurality of organic patterns having at least two heights and at least two radii, a ratio of the height to the radius of each organic pattern having a range of values; and a reflective plate on the first organic layer, the reflective plate having a high reflectance.
    Type: Application
    Filed: September 25, 2002
    Publication date: September 25, 2003
    Inventor: Su-Seok Choi
  • Patent number: 6621541
    Abstract: A transflective liquid crystal display device includes a liquid crystal panel, an electrophoretic display arranged under the liquid crystal panel, and a backlight device arranged under the electrophoretic display. The electrophoretic display has a first conducting electrode, a second conducting electrode, and transparent liquid interposed between the first and second panels. Charged pigment particles are suspended in the liquid, and are attracted to the first or second conducting electrodes depending on a polarity of a voltage applied. When the particles are attracted to the first electrode, light from the backlight is able to be transmitted to the liquid crystal panel. When the particles are attracted to the second electrode, light from external to the device is reflected from a layer of the particles on the second electrode.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: September 16, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: Su-Seok Choi
  • Patent number: 6611314
    Abstract: A liquid crystal injection apparatus and method for injecting a liquid crystal material between substrates of a liquid crystal display panel. The method and apparatus includes using an electric field to orientate the liquid crystal material during injection such that the liquid crystal material has a reduced viscosity. The electric field can be produced by electrodes adjacent the substrates, and by an electric source that applies a potential to the electrodes. Liquid crystal material injection can be the result of capillary forces and/or differential pressure.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: August 26, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Su-Seok Choi, Yong-Bum Kim
  • Publication number: 20030123003
    Abstract: An array substrate of a reflective liquid crystal display device including gate and data lines on the substrate, a thin film transistor adjacent to where a gate line and a data line cross over each other, wherein the thin film transistor has a gate electrode, a source electrode and a drain electrode, a passivation layer with an uneven surface having curved profiles that are asymmetric over the thin film transistor, and an opaque conductive pixel electrode having a reflective surface with curved profiles that are asymmetric on the passivation layer.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 3, 2003
    Applicant: LG.Philips LCD Co., Ltd.
    Inventors: Su-Seok Choi, Hyun-Suk Jin