Patents by Inventor Kazuhisa Toriyama

Kazuhisa Toriyama 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: 4588518
    Abstract: A nematic liquid crystal composition comprising (a) at least one compound of the formula: ##STR1## wherein R.sub.1 is n--C.sub.m H.sub.2m+1, n--C.sub.m H.sub.2m+1 --O or n--C.sub.m H.sub.2m+1 --CO; R.sub.2 is n--C.sub.q H.sub.2q+1, n--C.sub.q H.sub.2q+1 --O or n--C.sub.q H.sub.2q+1 --CO; m and q are each an integer of 1 to 10 and n is a symbol indicating that carbons are linked linearly, and (b) at least one compound of the formula: ##STR2## wherein R.sub.3 is n--C.sub.r H.sub.2r+1 or n--C.sub.r H.sub.2r+1 --O; R.sub.4 is n--C.sub.s H.sub.2s+1 or n--C.sub.s H.sub.2s+1 --O; r and s are each an integer of 1 to 10 and n is as defined above, and where necessary (c) at least one nematic liquid crystal compound having positive dielectric anisotropy and/or its homologous compound, and if necessary (d) at least one nematic liquid crystal compound having negative dielectric anisotropy and/or its homologous compound.
    Type: Grant
    Filed: August 29, 1979
    Date of Patent: May 13, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Tamihito Nakagomi, Kazuhisa Toriyama, Masatoshi Ito
  • Patent number: 4469618
    Abstract: A liquid crystal composition comprising, as the essential components, trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, trans-4-n-propyl-(4-cyanophenyl)-cyclohexane, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane and 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl is drivable over a wide temperature range and can be operated rapidly at low temperatures.
    Type: Grant
    Filed: July 8, 1982
    Date of Patent: September 4, 1984
    Assignees: Hitachi, Ltd., Merck Patent GmbH
    Inventors: Shinji Hasegawa, Kazuhisa Toriyama, Ludwig Pohl, Georg Weber
  • Patent number: 4464283
    Abstract: A liquid crystal composition comprising trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, trans-4-n-pentyl-(4' -ethylbiphenyl-4)cyclohexane, trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl)benzoate, and 4-(trans-4-n-pentyl-cyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl is drivable over a wide temperature range and can be operated rapidly at low temperatures.
    Type: Grant
    Filed: July 8, 1982
    Date of Patent: August 7, 1984
    Assignees: Hitachi, Ltd., Merck Patent GmbH
    Inventors: Shinji Hasegawa, Kazuhisa Toriyama, Ludwig Pohl, Georg Weber
  • Patent number: 4455261
    Abstract: A compound represented by the general formula ##STR1## wherein R represents a linear alkyl group having 1 to 10 carbon atoms.
    Type: Grant
    Filed: November 4, 1982
    Date of Patent: June 19, 1984
    Assignees: Dainippon Ink and Chemicals, Inc., Hitachi, Ltd.
    Inventors: Makoto Sasaki, Haruyoshi Takatsu, Hisato Sato, Tuneo Shimamura, Kazuhisa Toriyama, Tamihito Nakagomi
  • Patent number: 4372871
    Abstract: A nematic liquid crystal composition composed of (i) at least one compound of the general formula ##STR1## wherein R.sub.1 represents n-C.sub.m H.sub.2m+1, R.sub.2 represents n-C.sub.q H.sub.2q+1 -O, and m and q are integers of 1 to 10,(ii) at least one compound selected from the group consisting of nematic liquid crystalline compounds having positive dielectric anisotropy and homologs thereof, and (iii) as an optional ingredient, at least one compound selected from the group consisting of nematic liquid crystalline compounds having negative dielectric anisotropy and homologs thereof. This liquid crystal composition is colorless and chemically stable and has superior multiplexing drive characteristics. These properties render it useful as a display element.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: February 8, 1983
    Assignees: Dainippon Ink and Chemicals, Inc., Hitachi Ltd.
    Inventors: Kazuhisa Toriyama, Tamihito Nakagomi, Hisato Sato, Yutaka Fujita, Katsuhiko Morita, Yoshi Arai
  • Patent number: 4293698
    Abstract: There is provided a compound for controlling dielectric constant of liquid crystal consisting of 4-p-Alkylbenzoyloxypyridine oxide represented by the general formula ##STR1## where R is a normal alkyl group having 1 to 9 carbon atoms.
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: October 6, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhisa Toriyama, Tsujiaki Hata, Shinji Hasegawa, Ken Sasaki
  • Patent number: 4146656
    Abstract: A liquid crystal display device of the type comprising outer and lower substrates, electrodes formed on the inner surfaces of the substrates, liquid crystal orientation layers covering the protective films, and a liquid crystal interposed between the liquid crystal orientation films, is manufactured by forming the liquid crystal orientation layers by depositing SiO onto the protective films at a definite deposition angle with respect to the protective films and at a vapor deposition speed which varies in accordance with the type of the liquid crystal used.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: March 27, 1979
    Assignee: Hitachi, Ltd.
    Inventors: Kiyoshige Kinugawa, Kazuhisa Toriyama, Hironari Tanaka
  • Patent number: 3966631
    Abstract: A nematic liquid crystal composition having an improved response to a pulsating driving voltage for effecting a dynamic scattering mode which comprises a predominant amount of a nematic liquid crytal having properties of the dynamic scattering mode and 0.001 to 3% by weight of an onium halide salt having a nitrogen atom as a nucleus, the composition further containing a phenolic compound for improving the solubility of the onium halide salt in the lqiuid crystal and assisting in increasing the degree of dissociation of the neutral onium halide salt to ions.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: June 29, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhisa Toriyama, Hidetoshi Abe, Fumio Nakano, Kenji Murao, Mikio Sato
  • Patent number: 3956169
    Abstract: A nematic liquid crystal composition having an improved responsibility to a pulsating driving voltage and a prolonged descent time of dynamic scattering mode which comprises a predominant amount of a nematic liquid crystal having properties of dynamic scattering mode, 0.1 to 1 % by weight of a cholesteric compound and 0.01 to 5 % by weight of a halide of an organic quaternary nitrogen compound.
    Type: Grant
    Filed: February 21, 1974
    Date of Patent: May 11, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Nakano, Kazuhisa Toriyama, Noboru Nagata, Mikio Sato