Patents by Inventor Hitoshi Tomii

Hitoshi Tomii 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).

  • Color liquid crystal display having light shielding layers and method of manufacturing thereof
    Patent number: 5142392
    Abstract: Disclosed is a color liquid crystal display device having a plurality of pixels, in which conductive films are arranged at regions corresponding to the respective pixels, a light-shielding conductive layer is connected to the conductive films and extends in a region between the pixels, and color filters are formed on the conductive films.
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: August 25, 1992
    Assignees: International Business Machines Corporation, Kabushiki Kaisha Toshiba
    Inventors: Toshihiro Ueki, Yasuhisa Oana, Hitoshi Tomii
  • Liquid crystal display device with an inlet sealant containing particles
    Patent number: 5105290
    Abstract: A liquid crystal display device and method are described incorporating a liquid crystal container having an inlet, a liquid crystal, and an inlet sealant containing particles sized larger than the thickness of the inlet to the liquid crystal container. The invention overcomes the probelm of permeation of the inlet sealant into the liquid crystal container.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: April 14, 1992
    Assignee: International Business Machines Corporation
    Inventors: Hitoshi Tomii, Shunji Suzuki, Tetsuya Nakano, Kenji Terada
  • Color liquid crystal display device having light-shielding conductive layers
    Patent number: 5083853
    Abstract: Disclosed is a color liquid crystal display device having a plurality of pixels, in which conductive films are arranged at regions corresponding to the respective pixels, a light-shielding conductive layer is connected to the conductive films and extends in a region between the pixels, and color filters are formed on the conductive films.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: January 28, 1992
    Assignees: International Business Machines Corporation, Kabushiki Kaisha Toshiba
    Inventors: Toshihiro Ueki, Yasuhisa Oana, Hitoshi Tomii
  • Liquid crystal composition
    Patent number: 4737312
    Abstract: Liquid crystal compositions containing at least one compound of the formula IR-Dio-Ph-CN Iwherein R is alkyl of 2 to 5 carbon atoms, Dio is trans-1,3-dioxane-2,5-diyl and Ph is 1,4-phenylene, and at least one compound of each of the following groups A to D:R.sup.1 -Cy-Ph-R.sup.2 AR.sup.3 -Cy-Ph-Ph-R.sup.4 BR.sup.5 -Cy-Ph-CN CR.sup.6 -Cy-COO-Ph-O-R.sup.7 Dand, in addition in a total amount of 10 to 26% by weight at least five compounds of the formula ER.sup.8 -Pyr-Ph-O-R.sup.9 Eor at least one compound of each of the following groups F to K:R.sup.10 -Ph-COO-Ph-R.sup.11 FR.sup.12 -Cy-COO-Ph-Ph-CN GR.sup.13 -Ph-Ph-COO-Ph-Ph-CN HR.sup.14 -Ph-COO-Ph-COO-Ph-R.sup.15 JR.sup.16 -Ph-Ph-COO-PhF-R.sup.17 Kresult in surprisingly steep electrooptical characteristics and surprisingly low viewing-angle dependence of the contrast at simultaneously acceptable threshold voltages for commercially available drivers and multiplex ratios up to 1:100 when used in matrix displays.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: April 12, 1988
    Assignees: Merck Patent Gesellschaft mit beschrankter Haftung, Toshiba Corporation
    Inventors: Shoichi Matsumoto, Hitoshi Tomii, Bernhard Scheuble, Georg Weber, Ian C. Sage
  • Liquid crystal display element
    Patent number: 4366080
    Abstract: A liquid crystal display element utilizing dynamic scattering uses a liquid crystal composition comprising a liquid crystal and charge transfer complex. The charge transfer complex contains nitro-substituted 9-fluorenones as the electron acceptor.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: December 28, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Kiyoshi Mizunoya, Shoichi Matsumoto, Hitoshi Tomii, Masahiro Kawamoto, Yuusuke Wada