Patents by Inventor Yoshiharu Hirai

Yoshiharu Hirai 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: 7410677
    Abstract: An object of the invention is to provide a polymerizable liquid-crystal composition for obtaining a liquid-crystal film having good adhesiveness to supporting substrates. A polymerizable liquid-crystal layer of controlled alignment can be formed from the polymerizable liquid-crystal composition, and when the polymerizable liquid-crystal composition is polymerized, it gives a liquid-crystal film. The polymerizable liquid-crystal composition of the invention contains a polymerizable liquid-crystal compound represented by Formula (1) and a organosilicon compound having a primary amino group. wherein W is hydrogen, alkyl, alkenyl, halogen, —CN or -(G-Sp)r-P; P is a polymerizable group; Sp is alkylene; G is a bonding group; and MG is a mesogenic group represented by Formula (2): wherein T1 and T2 are ringed group; G1 is a bonding group; and f is an integer of 0 to 4. The symbols in these formulae are defined in detail in claim 2.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: August 12, 2008
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Yoshiharu Hirai, Takashi Kato
  • Publication number: 20080014374
    Abstract: The invention is to provide such a polymerizable liquid crystal composition that is excellent in stability in a solution state, shows good coating property on a supporting substrate, and has uniform homeotropic alignment property. The polymerizable liquid crystal composition of the invention contains an acrylate compound and a bisphenol fluorene compound. The bisphenol fluorene compound is effective for controlling uniform homeotropic alignment of the polymerizable liquid crystal composition.
    Type: Application
    Filed: June 20, 2007
    Publication date: January 17, 2008
    Inventor: Yoshiharu Hirai
  • Publication number: 20070128379
    Abstract: The invention includes homeotropically aligned liquid crystal films obtained by applying a polymerizable liquid crystal composition containing at least one compound selected from the group consisting of polymerizable liquid crystal compounds represented by the following formula (1-1) to the following formula (1-3) onto a substrate having a polar surface, and polymerizing the composition: wherein R1 is methyl or ethyl; Z1 is a single bond, —COO—, —OCO—, —CH?CH—COO— or —CH2CH2—COO—; Z2 is —COO— or —OCO—; each Y is independently hydrogen or fluorine; X is —OCF3 or —CN; w is 0, 1 or 2; and a is an integer of 1 to 10.
    Type: Application
    Filed: December 6, 2006
    Publication date: June 7, 2007
    Inventor: Yoshiharu Hirai
  • Publication number: 20060134350
    Abstract: The present invention relates to a polymer satisfying at least two characteristics among the characteristics such that it has orientation of homeotropic and so forth; it has an orientation having no (or less) defects; it has a large optical anisotropy; it is tightly adhered to a supporting plate; it has a sufficient hardness; it is colorless and transparent; it has a large heat resistance; it has a large weatherability; and so forth and to a composition which is the precursor. The composition contains the following the compound (1), (2) and (3). In the above formulas, R is hydrogen or methyl, L is hydrogen, fluorine and so forth, A is 1,4-phenylene and so forth, X is trifluoromethyl and so forth, Y is hydrogen or fluorine, Z is —COO— and so forth, and n is an integer of 1 to 10.
    Type: Application
    Filed: November 9, 2005
    Publication date: June 22, 2006
    Inventors: Yoshiharu Hirai, Takashi Kato
  • Publication number: 20050224754
    Abstract: An object of the invention is to provide a polymerizable liquid-crystal composition for obtaining a liquid-crystal film having good adhesiveness to supporting substrates. A polymerizable liquid-crystal layer of controlled alignment can be formed from the polymerizable liquid-crystal composition, and when the polymerizable liquid-crystal composition is polymerized, it gives a liquid-crystal film. The polymerizable liquid-crystal composition of the invention contains a polymerizable liquid-crystal compound represented by Formula (1) and a organosilicon compound having a primary amino group. wherein W is hydrogen, alkyl, alkenyl, halogen, —CN or -(G-Sp)r-P; P is a polymerizable group; Sp is alkylene; G is a bonding group; and MG is a mesogenic group represented by Formula (2): wherein T1 and T2 are ringed group; G1 is a bonding group; and f is an integer of 0 to 4. The symbols in these formulae are defined in detail in claim 2.
    Type: Application
    Filed: December 3, 2004
    Publication date: October 13, 2005
    Inventors: Yoshiharu Hirai, Takashi Kato
  • Publication number: 20050213009
    Abstract: The present invention provides a photopolymerizable liquid crystal composition comprising at least a compound having oxiranyl as a first component and at least a compound having oxetanyl as a second component, a polymer or a polymer composition obtained from the liquid crystal composition, a film obtained from the polymer or polymer composition, and an optical compensation element using the film.
    Type: Application
    Filed: November 19, 2004
    Publication date: September 29, 2005
    Inventors: Motoki Yanai, Kazuhiko Saigusa, Ryushi Shundo, Yoshiharu Hirai
  • Patent number: 4758106
    Abstract: A battery powered serial printer having a print head for printing data on a printing sheet in a normal direction from the beginning of a line or in the reverse direction from the end of a line includes a drive unit for moving the print head in reciprocatory movement in the normal and reverse directions, and a device for judging whether the print head is printing characters in the normal direction or in the reverse direction. The serial printer further includes a correcting device responsive to voltage changes for delaying the initiation of the operation of printing characters by the print head at the least in either the normal direction and/or the reverse direction judged by the judging device, so as to bring the positions of characters printed in the normal direction into alignment with the positions of characters printed in the reverse direction.
    Type: Grant
    Filed: April 1, 1987
    Date of Patent: July 19, 1988
    Assignee: Brother Industries, Ltd.
    Inventors: Tsuneo Yasui, Yoshiharu Hirai
  • Patent number: 4647238
    Abstract: A printer using a disposable ribbon which is fed from a feed section toward a take-up section of a feeding device upon completion of printing of each line of characters. The printer comprises a memory for storing position data representing a feed-side end of an active portion of the ribbon which has been used for the last printed line, the feed-side end being located on the side of the feed section of the feeding device, and another memory for storing another position data representing a take-up-side end of another active portion of the ribbon which is to be used for the next line of characters, the take-up-side end being located on the side of the take-up section of the feeding device.
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: March 3, 1987
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Tsugio Okamoto, Yoshiharu Hirai