Patents Examined by Tiep H. Nguyen
  • Patent number: 5815226
    Abstract: An active matrix liquid crystal display having a high aperture ratio is provided. Retaining capacitors are created between a black matrix and pixel electrodes via a dielectric layer made from an organic resinous material or inorganic material. Those regions of the black matrix which cover TFTs are fully utilized. Therefore, wider area can be used to display an image than heretofore. In the present invention, the difference in relative dielectric constant between different dielectric layers is employed. Therefore, retaining capacitors can be created without the need to take account of parasitic capacitance.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: September 29, 1998
    Assignees: Semiconductor Energy Laboratory Co., Ltd., Sharp Kabushiki Kaisha
    Inventors: Shunpei Yamazaki, Jun Koyama, Naoaki Yamaguchi, Katunobu Awane, Fumiaki Funada, Yoshitaka Yamamoto
  • Patent number: 5815232
    Abstract: A color filter substrate has a substrate structure, spacers which include a first spacer layer and a plurality of second spacer layers. Each of the second spacer layers has a sectional plane which is substantially parallel to the substrate structure. And the sectional plane has a entire projective area of the first spacer layer therein and an elongated portion from the projective area, so that an area of effective thickness of the spacer to maintain the gap between two substrates depends on an area of a smaller of the first and second surfaces of the first spacer layer. In other words, the outline of the first spacer layer is located so as to be entirely included within the outline of these second spacer layers. If the central axis of the first spacer layer is shifted from that of the second spacer layers in the manufacturing process of the liquid crystal display apparatus, misalignment between first and second spacer layers occurs.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: September 29, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Daisuke Miyazaki, Shoichi Kurauchi, Hitoshi Hatoh, Takeshi Yamamoto, Teruyuki Midorikawa
  • Patent number: 5815024
    Abstract: A look-up table circuit implemented with MOS transistors that uses combinational logic to generate signals that enable the transistors. A circuit using 16 inputs and 4 select lines is disclosed. Two of the select lines are used as inputs to combinational logic including four NOR gates to generate enable signals for transistors in a third stage of the circuit. This produces a reduction in the propagation delay of a signal from the input to the output of the look-up table circuit.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: September 29, 1998
    Assignee: Altera Corporation
    Inventors: Srinivas T. Reddy, Anil Gupta
  • Patent number: 5812231
    Abstract: A high-density impurity semiconductor region having the same conductivity type as a single-crystal silicon substrate is formed in addition to a main circuit portion of a peripheral circuit on the single-crystal silicon substrate. This semiconductor region is connected to a given potential point directly leading to an electric source. Alternatively, at a part of the peripheral drive circuit, a high-density impurity semiconductor region having a conductivity type reverse to that of the single-crystal silicon substrate is formed, and this semiconductor region is connected to a given potential point directly leading to an electric source. This can solve the problem that photocarriers (electrons and/or holes) caused by the light having not cut off and having entered into the single-crystal silicon region may enter into the peripheral drive circuit through the single-crystal silicon substrate to cause misoperation of the circuit.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: September 22, 1998
    Inventors: Tetsunobu Kochi, Mamoru Miyawaki, Shunsuke Inoue, Takanori Watanabe
  • Patent number: 5812225
    Abstract: A display screen for improving the angle of view from which displayed images can be perceived accurately. An illumination device produces light which is collimated along a plane YOZ orthogonal to the plane XOZ in which the screen has its best characteristics in terms of contrast and/or levels of gray. The collimated illumination device is on the front face of a cell. A device for distributing the light (by diffraction or scattering) in the plane YOZ is placed at the output of the cell. One or more compensation films can be placed at the output of the cell to increase the angle of view in the plane XOZ. This device may be used in avionics and the display of video images.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: September 22, 1998
    Assignees: Sextant Avionique, Thomson Multimedia
    Inventors: Frederic de Lauzun, Gunther Haas
  • Patent number: 5808707
    Abstract: An impact-resistant display apparatus is constituted by a display panel, a drive circuit for driving the display panel, a face plate disposed in front of the display panel, and a support member for supporting the display panel and the drive circuit. The display apparatus further includes a first elastic member between a rear side of the display panel and the support member, and a second elastic member between a front side of the display panel and the face plate. The first and second elastic members may preferably respectively define and almost closed space together with adjacent associate members so as to provide an air damper-effect.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: September 15, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Niibori, Masanori Takahashi, Yasushi Shioya, Takashi Satoh
  • Patent number: 5808706
    Abstract: Liquid crystal display devices include a matrix of thin-film transistor (TFT) display cells and storage capacitors to capacitively cross-couple pixel electrodes of adjacent display cells together in an efficient manner to improve display resolution. A preferred display device includes a plurality of liquid crystal display cells and spaced storage capacitors which are directly cross-coupled between pixel electrodes of display cells in adjacent rows and/or columns of cells. Here, the spaced storage capacitors each have a first electrode electrically connected to a pixel electrode in one display cell and a second electrode spaced opposite the first electrode and electrically connected to a pixel electrode in another adjacent display cell in the same column or row of display cells.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: September 15, 1998
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Byung-Seong Bae
  • Patent number: 5808715
    Abstract: A liquid crystal display device having TiO.sub.2 --SiO.sub.2 composite layers used as undercoat and overcoat is provided. The TiO.sub.2 --SiO.sub.2 composite layers serving as the undercoat and overcoat of transparent conductive electrodes are formed by a low temperature ion-assisted electron gun evaporation or sputtering process, wherein the TiO.sub.2 --SiO.sub.2 composite materials can also be used as hard layers to protect the surfaces of transparent plastic substrates. These TiO.sub.2 --SiO.sub.2 composite layers have superior insulation, a high degree of hardness and smoothness. Consequently, the advantages of the TiO.sub.2 --SiO.sub.2 composite layer are as follows: (1) the out diffusion of impurities (sodium ions) can be prevented from soda lime glass into liquid crystal to destroy the property of the liquid crystal; (2) short circuit caused by impurities having the same size as the gap between the electrodes can also be prevented; (3) the TiO.sub.2 --SiO.sub.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: September 15, 1998
    Assignee: Industrial Technology Research Institute
    Inventors: Rung-Ywan Tsai, Fang-Chuan Ho
  • Patent number: 5801800
    Abstract: A visual display system, composed of an array of light emitting devices, forming an image source, a phase spatial light modulator scanner, driver/control circuitry and an optical magnification system. The display system being enclosed within a housing, thereby forming an optical magnifier. The phase spatial light modulator scanner is operative in either a transmissive mode or a reflective mode. In operation, an external stimulus, such as a voltage, is applied to the scanner, thereby changing the phase of light emitted therethrough. The scanning action enhances display resolution of the generated resultant image without an increase in the number of pixels of the image source. The phase spatial light modulator scanner operates by scanning sub-pixels, pixel groups, and/or sub-arrays of the image source.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: September 1, 1998
    Assignee: Motorola, Inc.
    Inventors: Phil Wright, Diana Chen, Fred V. Richard, Karen E. Jachimowicz, Rong-Ting Huang
  • Patent number: 5798806
    Abstract: A spatial light modulator (SLM) providing effects light blocking of even strong incident light without reducing the photoelectric conversion efficiency, and a projector using said SLM, are disclosed.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: August 25, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Tsutsui, Kazunori Komori, Kazuhiro Nishiyama, Yasunori Kuratomi, Akio Takimoto, Koji Akiyama, Shinichi Mizuguchi
  • Patent number: 5798807
    Abstract: In order to generate dynamic images whose structure (spatial frequency) or chromaticity may be modulated or controlled by various low frequency signal sources, a rotary-dispersive, optical element (NC) which may be varied through outer influences and controlled as an analyzer and of a transparent object (OAM) arranged in the path of the rays betwen the polarizer and the analyzer. The object is designed as a polarization matrix or as one or several homogeneous, optically rotating substances.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: August 25, 1998
    Inventor: Horst Prehn
  • Patent number: 5796453
    Abstract: A liquid crystal display device includes a pair of substrates; a liquid crystal layer interposed between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer. The liquid crystal layer includes a polymer dispersed liquid crystal material having a polymer phase and a liquid crystal phase, and fulfills the conditions represented by:2.585.multidot.d.sup.(-1/3) -0.3<R<2.585.multidot.d.sup.(-1/3) +0.3where d represents the thickness of the liquid crystal layer in the unit of micrometers and R represents the characteristic length of the liquid crystal phase in the unit of micrometers.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: August 18, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenji Nakao, Masao Yamamoto, Tsuyoshi Uemura
  • Patent number: 5793454
    Abstract: The liquid crystal display device of this invention includes: a pair of substrates facing each other and a display medium sandwiched between the pair of substrates. In this liquid crystal display device, at least one of the pair of substrates is a flexible film having polarizer properties and the display medium includes a liquid crystal phase and a polymer phase.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: August 11, 1998
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Naoko Kawazu, Shinji Shimada
  • Patent number: 5793459
    Abstract: A liquid crystal display element has: a pair of substrates facing each other; a liquid crystal layer sandwiched between the pair of substrates; a unit for applying an electric field to the liquid crystal layer, the electric field being substantially parallel to surfaces of the pair of substrates; and an alignment structure that an interface of one of the pair of substrates with the liquid crystal layer is not subjected to a positive alignment process and an interface of the other of the pair of substrates with the liquid crystal layer is subjected to the positive alignment process, wherein the alignment state of liquid crystal molecules of the liquid crystal layer is changed between directions both parallel to the surfaces of the pair of substrates.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: August 11, 1998
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Yasuo Toko
  • Patent number: 5790215
    Abstract: This invention is a liquid crystal display device including a reflecting plate formed above a substrate, and a liquid crystal cell formed by alternately, repeatedly stacking a liquid crystal layer and a transparent electrode layer at least once on the reflecting plate, wherein the liquid crystal layer includes a thin film constituted by a microcapsulated guest-host liquid crystal containing dye molecules and liquid crystal molecules.
    Type: Grant
    Filed: March 13, 1996
    Date of Patent: August 4, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Sugahara, Norihiko Kamiura, Yutaka Nakai, Katsuyuki Naito, Kohei Suzuki
  • Patent number: 5784137
    Abstract: A liquid crystal display device includes substrates opposed to each other, a polymeric layer patterned into a predetermined pattern, and a liquid crystal layer at least partially surrounded by the polymeric layer. The polymeric layer and the liquid crystal layer are interposed between the substrates. The polymeric layer is at least partially formed by polymerizing a liquid crystalline polymerization precursor in a state where the molecules of the liquid crystalline polymerization precursor are aligned in a predetermined direction by an alignment regulating force of at least one of the substrates.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: July 21, 1998
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Shiomi, Shinji Yamagishi, Tokihiko Shinomiya, Shuichi Kozaki, Kohichi Fujimori
  • Patent number: 5781264
    Abstract: A liquid crystal display device comprising a multilayer printed wiring board having an insulation layer of glass fiber woven fabric impregnated with a resin and having a coefficient of thermal expansion of 15 ppm/.degree.C. or less, which is provided by a glass yarn of which the glass fiber woven fabric is formed having a coefficient of thermal expansion of 4 ppm/.degree.C. or less and a modulus of elasticity of 7000 kg/mm.sup.2 or more or alternatively provided by the resin with which the glass fiber woven fabric is impregnated having a modulus of elasticity of 200 kg/mm.sup.2 or less and the glass yarn having a coefficient of thermal expansion of 6 ppm/.degree.C. or less and a modulus of elasticity of 7000 Kg/mm.sup.2 or more.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: July 14, 1998
    Assignee: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Masayuki Noda, Yutaka Yamaguchi, Minoru Yonekura, Hiroyuki Yamanaka
  • Patent number: 5781258
    Abstract: The present invention features flat-panel displays having a mosaic of tiles, and methods of constructing and sealing them. Sealing designs are described to maintain appropriate vacuum levels for FEDs, PFPDs and LCDs. The mosaic of tiles forming a flat-panel display may include subassembly tiles, with each consisting of two, unsealed, substantially parallel plates having a structure positioned between them; these are known as s-tiles. The tiles may be enclosed by a cover plate and backplate. Non-permeable material may be deposited on the cover plate and the backplate, with solderable metal overlaid on the non-permeable material. A metallized, non-permeable spacer/connector is also located between the cover plate and backplate for hermetically sealing the perimeter of the display. A set of electrical-interconnection, metal feed-throughs can also be positioned in the non-permeable spacer/connector.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: July 14, 1998
    Assignee: Rainbow Displays, Inc.
    Inventors: Sanjay Dabral, Raymond G. Greene, John P. Koons, Donald P. Seraphim, Boris Yost
  • Patent number: 5781262
    Abstract: Liquid crystal display (LCD) has sub-pixel domains within each pixel to obtain a wide viewing angle. The sub-pixel domains are formed by divided orientation alignment in which the sub-pixel domain are subjected to rubbing in different directions opposite to each other. The liquid crystal has a splay-type TN deformation structure in the first sub-pixel domain and a normal TN deformation structure in the second sub-pixel domain. The pre-tilt angles of the liquid crystal in the first domain and second domain are selected to obtain a wide viewing angle. The LCD has a shield pattern for for shielding disclination causing afterimages and storage capacitor electrodes having a function as a signal lines.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: July 14, 1998
    Assignee: NEC Corporation
    Inventors: Masayoshi Suzuki, Ken-Ichi Takatori, Ken Sumiyoshi, Setsuo Kaneko, Teruaki Suzuki, Hideo Shibahara, Yoshihiko Hirai
  • Patent number: 5777707
    Abstract: A color liquid crystal display device includes a first substrate having thereon a layer of plural color filter segments and a layer of first transparent electrodes disposed in superposition with the layer of color filter segments, a second substrate disposed opposite to and spaced apart from the first substrate and having thereon a layer of second transparent electrodes intersecting with the first transparent electrodes, and a liquid crystal disposed between the first and second substrates so as to form plural color pixels each at a region of intersection of the first and second transparent electrodes superposed with one of the color filter segments while leaving a pixel spacing between the plural color pixels.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: July 7, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichi Masaki, Kazuya Ishiwata, Masaaki Suzuki, Yuko Yokoyama