Patents Examined by Julie Ngo
  • Patent number: 7428028
    Abstract: A liquid crystal display device and method that are adaptive to compensate for brightness deviation among red, green and blue colors. This device includes red liquid crystal cell lines having red liquid crystal cells, green liquid crystal cell lines having green liquid crystal cells, and blue liquid crystal cell lines having blue liquid crystal cells. Common electrodes are formed for each red, green and blue liquid crystal line. A common electrode of at least one liquid crystal cell line of the red, green and blue liquid crystal cell lines is supplied with a different common voltage that is a reference voltage to drive the liquid crystal cells.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: September 23, 2008
    Assignee: LG Display Co., Ltd.
    Inventor: Sang Ho Choi
  • Patent number: 7425999
    Abstract: To suppress the occurrence of a failure caused by static electricity in the manufacturing process of an active matrix type display device in which an active matrix circuit and peripheral drive circuits are integrated on a glass substrate, a protective capacitor to be connected to a short ring is formed using a semiconductor layer made from the same material as the active layer of a thin film transistor present under the short ring. This protective capacitor has a function to absorb an electric pulse generated in the plasma using process. Discharge patterns are provided to prevent an electric pulse from affecting each circuit.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: September 16, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hongyong Zhang, Satoshi Teramoto
  • Patent number: 7420646
    Abstract: A seal pattern on a substrate for a liquid crystal display device includes a plurality of main seal patterns along first and second direction, a dummy seal pattern between the adjacent main seal patterns along the first direction, a first sub-seal pattern surrounding the plurality of main seal patterns, and a second sub-seal pattern at an exterior of the first sub-seal pattern, the second sub-seal pattern corresponding to a borderline between the adjacent main seal patterns along the second direction.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: September 2, 2008
    Assignee: LG Display Co., Ltd.
    Inventor: Jong-Chil Lee
  • Patent number: 7400365
    Abstract: A method for manufacturing thin film transistor array substrate for a liquid crystal display device-includes:—(a) forming a first metal thin film layer on a insulating substrate and forming a gate wiring and a gate electrode by a first photolithography. (b) forming a gate insulating film layer, a semiconductor film layer, an ohmic contact film layer and a second metal thin film layer, and forming the thin film transistor by a second photolithography, (c) forming an interlayer insulating film, and forming a pixel contact hole, a first contact hole and a second contact hole by a third photolithography, and (d) forming a transparent conductive film, and forming a pixel electrode by a fourth photolithography. The first metal thin film has a two-layered structure comprising a first layer made of aluminum or aluminum alloy and a second layer located on said first layer, and the second metal thin film is formed of an alloy mainly containing molybdenum.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: July 15, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Fumihiro Gotoh, Nobuaki Ishiga, Toshio Araki, Kazunori Inoue, Hiroyasu Itoh, Eiji Shibata, Masanao Nabeshima
  • Patent number: 6933994
    Abstract: A liquid crystal display comprises a top polarizer 11, an optical compensating element, an anisotropic scattering layer 10, a scattering layer 7, and a liquid crystal device 20 incorporating therein a reflective layer 9. When the direction of viewing direction of the anisotropic scattering layer is designated as the Y-axis direction, and a direction oriented substantially at right angles to the Y-axis direction is designated as the X-axis direction, light entering the anisotropic scattering layer is scattered over a wider angle along the Y-axis direction than along the X-axis direction. Further, the incident angle dependence of the straight-go transmittance of the anisotropic scattering layer is symmetrical about the layer normal, and the straight-go transmittance in the layer normal direction is lower than the straight-go transmittance in any oblique direction.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: August 23, 2005
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Yasushi Kaneko, Makoto Arai
  • Patent number: 6801271
    Abstract: Disclosed is a two-way display-type liquid crystal display device.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: October 5, 2004
    Assignee: PanTech, Co., Ltd.
    Inventors: Sang Hoon Han, Hyun Jung Jeong, Yong Joon Han
  • Patent number: 6765629
    Abstract: A polarizer integrated with a transparent conductive film for a liquid crystal display includes a lower film an optical film and a transparent conductive film. A touch panel integrated with the polarizer is formed by attaching an upper sheet to the upper surface of the polarizer integrated with a transparent conductive film. A flat panel display with an integral type touch panel includes a touch panel integrated with the flat panel display having a lower polarizer, a liquid crystal display and an upper polarizer.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: July 20, 2004
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Yun Cheol Jeong, Young Soo Ahn, Jang Youl Rhee, Byoung Hyun Jeong
  • Patent number: 6762819
    Abstract: A liquid crystal display (LCD) device has electrodes on barrier ribs that are adaptive for widening a viewing angle and improving an aperture ratio of the LCD device. In the device, barrier ribs are formed from an insulating material at the boundary portion of the pixel cells. First and second electrodes are provided at opposite surfaces of the barrier ribs to apply an electric field to the liquid crystal. Accordingly, the viewing angle can be widened and the electrode area can be minimized, thereby improving the aperture ratio and the light transmissivity.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: July 13, 2004
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Seung Chul Lee
  • Patent number: 6757045
    Abstract: A liquid crystal device is constituted by a layer of a chiral smectic liquid crystal, a pair of substrates oppositely disposed to sandwich the liquid crystal and each provided with an electrode for applying a voltage to the liquid crystal, at least one of the substrates being provided with a uniaxial aligning axis for aligning the liquid crystal, and a polarizer disposed on at least one of the substrates.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: June 29, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasufumi Asao, Masahiro Terada, Takeshi Togano
  • Patent number: 6757031
    Abstract: Disclosed is a metal contact structure and method for a thin film transistor array in liquid crystal display in order to prevent source/drain electrode metal layer from plasma damage and oxide insulator formation thereon during contact hole process, such that low contact resistance is obtained between the source/drain electrode metal layer and top-ITO conductive layer, wherein a thin film transistor structure is formed on a substrate and a metal oxide conductive film is covered on the source/drain electrode metal layer of the thin film transistor structure before an insulative passivation layer is deposited over the thin film transistor structure.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: June 29, 2004
    Assignee: Prime View International Co., Ltd.
    Inventors: Wen-Jian Lin, Wei-Chou Lan
  • Patent number: 6741321
    Abstract: A raw panel for a liquid crystal display. A first substrate includes first electrodes opposing a second substrate including second electrodes. A plurality of main walls having a predetermined height are arranged in a striped pattern between first and second substrates to define a plurality of channels. The channels include sets of pixels, each set formed by three neighboring channels. First sub-walls are mounted at a predetermined distance from a first end line and between the main walls defining first channels in sets the first channels each having at least two separate spaces. Second sub-walls are mounted at a predetermined second distance from the first end line and between the main walls defining second channels in sets, the second channels each having at least two separate spaces. The raw panel is opened at the first end line and at a second end line opposite the first end line.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: May 25, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Seok-Hong Jeong, Woon-Seop Choi, Jeong-Geun Yoo, Yeon-Gon Mo, Min-Kyu Kim, Hee-Jung Lee
  • Patent number: 6707519
    Abstract: A liquid crystal device of the present invention performs transmissive display using light from an illumination devices 111 and 112 in a dark environment, and reflective display using light reflected by a transflective layer 123 provided on the inner side of a liquid crystal cell in a bright environment. A retardation plate is provided adjacent to a polarizer 109 and an illumination device so that the rotational direction of polarization of the light emitted from the illumination device is the same as that of the polarization of the light reflected by the transflective layer in a dark display state.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: March 16, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Osamu Okumura, Tsuyoshi Maeda, Eiji Okamoto, Takumi Seki
  • Patent number: 6697129
    Abstract: A liquid crystal display device comprising a light modulating layer being interposed between a first substrate and a second substrate, a common electrode being formed over the first substrate in parallel with a drain electrode, wherein an electric field is formed between the drain electrode and the common electrode in a parallel direction to the first substrate, wherein said light modulating layer comprising a liquid crystal material, an optically active substance and a dichroic dye is operated in a guest-host mode, wherein said liquid crystal material has a spiral pitch p in a range of 1<p<15 &mgr;m, and wherein a cell thickness d is in a range of 1<d<10 &mgr;m.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: February 24, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeshi Nishi, Rumo Satake, Yoshiharu Hirakata
  • Patent number: 6697144
    Abstract: Switchable optical components such as switchable mirrors and variable retarders are fabricated using a unique class of materials. These materials are thin film composites comprising of porous inorganic films imbibed with liquid crystal materials.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: February 24, 2004
    Assignee: Agilent Technologies, Inc.
    Inventor: John C. Kralik
  • Patent number: 6697130
    Abstract: A flexible circuit board mounted with top-light LEDs and LED control circuits provides a convenient and space efficient way to backlight an LCD. The flexible circuit board may have multiple tabs that are folded such that the top-light LEDs provide light into a light pipe from multiple directions. The top-light LEDs and LED control circuits may be located on the same side of the flexible circuit board for improved cost savings and manufacturability.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: February 24, 2004
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Paul F. L. Weindorf, David R. Anderson
  • Patent number: 6693696
    Abstract: A liquid-crystal electro-optical device is offered which can operate at high speeds and easily oriented. The value of the surface tension of liquid crystal-orienting layers is 40 dynes/cm or more, and these layers are rubbed in antiparallel directions to each other. This reduces the pretilt angle of the molecules of a nematic liquid crystal sandwiched between two substrates. The anisotropy of the dielectric constant of the nematic liquid crystal is positive.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: February 17, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Toshimitsu Konuma
  • Patent number: 6693686
    Abstract: A polarizing element 20 includes a cholesteric layer 21 that selectively reflects either one of right-handed and left-handed circularly polarized components of incident light, and an absorptive elliptical polarizing plate 22 that is laminated to the cholesteric layer 21. The polarizing plate 22 transmits elliptically polarized light that contains as its main component the circularly polarized component having the direction of optical rotation that is identical to that of the circularly polarized component selectively reflected by the cholesteric layer 21. In this polarizing element 20, the angle (angle of lamination) which the direction of the major axes of liquid crystalline molecules aligned on the absorptive-elliptical-polarizing-plate-side surface of the cholesteric layer 21, d1, forms with the direction of the major axis of elliptically polarized light produced by the absorptive elliptical polarizing plate 22, d2, falls in a specified angle range centering around 90°.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: February 17, 2004
    Assignee: Ai Nippon Printing Co., Ltd.
    Inventor: Masanori Umeya
  • Patent number: 6686975
    Abstract: An apparatus for improved contrast in projection optical systems consists of a polarizing beam splitter (PBS) in combination with two or more waveplates whose fast exes are aligned perpendicular to each other. The apparatus has an effective broadband frequency response that is better than that of the individual retarders acting alone, and through the selection of a birefringence factor and thickness of the individual retarders, wavelength dependencies are minimized.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: February 3, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Duncan J. Anderson, Khalid Shahzad
  • Patent number: 6686986
    Abstract: An IPS liquid crystal displaying apparatus includes: a TFT array substrate, an opposite substrate opposed to the TFT array substrate and liquid crystal interposed between the TFT array substrate and the opposite substrate, wherein the TFT array substrate is composed of a glass substrate, a gate insulating film formed on the glass substrate, a possivation film formed on the gate insulating film, a plurality of scanning lines for transmitting a scanning signal, a plurality of signal lines for transmitting an image signal, a plurality of pixels arranged in grid like pattern by crossing the plurality of scanning lines with the plurality of signal lines, a plurality of TFTs implementing switching operation of the image signal on the basis of the scanning signals, a plurality of driving electrodes connected with the TFT, a plurality of opposite electrodes arranged in such a manner that each of the plurality of opposite electrodes is opposed to each of the driving electrodes, and a plurality of common lines for mutu
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: February 3, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasunori Niwano, Yuichi Masutani, Ken Nakashima, Yuuzou Oodoi, Kazuhiro Kobayashi
  • Patent number: RE38516
    Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel. A liquid crystal display includes upper and lower casings for holding a liquid crystal display panel and substrates. The casings are provided with at least one of fixing pawls and recesses for receiving the fixing pawls so as to enable the connection of the casings.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: May 18, 2004
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kaoru Hasegawa, Yoshio Toriyama, Naoto Kobayashi, Katsuhiko Yarita, Hironori Kondo, Masahiko Suzuki, Yoshihiro Imajo