Patents by Inventor Yuji Nakatsugawa

Yuji Nakatsugawa 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: 9981455
    Abstract: A gas barrier film, an apparatus comprising the gas barrier film, and a process for producing the gas barrier film are provided. The gas barrier film comprises a plastic film having an oligomer content of not more than 1% by weight, an organic layer provided on the plastic film, and an inorganic layer provided on the organic layer. The organic layer has a thickness that is larger than a maximum difference in elevation on the surface of the plastic film. The gas barrier film having the above construction has excellent gas barrier properties.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: May 29, 2018
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Yuji Nakatsugawa
  • Patent number: 8660690
    Abstract: A robot control system has a portable operating device TP and a robot control device RC. The portable operating device TP is actuated by a rechargeable secondary battery and used to operate a robot R. The robot control device RC is capable of wireless communication with the portable operating device TP and performs automatic operation of the robot R based on teaching data provided by the portable operating device TP. The robot control system causes an emergency stop of the robot R when the wireless communication between the portable operating device TP and the robot control device RC is interrupted. The robot control system further includes a charging device CU, a connection monitoring section 12, and an automatic operation continuing section 11. The charging device CU charges the secondary battery by electrically connecting the portable operating device TP to the robot control device RC.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: February 25, 2014
    Assignees: Daihen Corporation, Nachi-Fujikoshi Corp.
    Inventors: Nobuhiro Tani, Yasuhiro Koujina, Yuji Nakatsugawa
  • Publication number: 20120276353
    Abstract: There are provided a gas barrier film having excellent gas barrier properties, an apparatus comprising the gas barrier film, and a process for producing the gas barrier film. A gas barrier film 1 comprises a plastic film 2 having an oligomer content of not more than 1% by weight, an organic layer 3 provided on the plastic film 2, and an inorganic layer 4 provided on the organic layer 3, the organic layer 3 having a thickness that is larger than a maximum difference in elevation on the surface of the plastic film 2. The gas barrier film 1 having the above construction has excellent gas barrier properties.
    Type: Application
    Filed: November 25, 2010
    Publication date: November 1, 2012
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventor: Yuji Nakatsugawa
  • Patent number: 8027014
    Abstract: The invention provides: an optical element that includes a birefringence functional layer constituted of a polymerizable liquid crystal material, in which the birefringence functional layer is formed directly or indirectly on a substrate, and in a post-process carried out thereafter, alignment and characteristics of the birefringence functional layer are not disturbed, with the result that a high quality birefringence control function can be exerted; a liquid crystal display device provided with the optical element; a method of evaluating a birefringence functional layer that is not disturbed in the alignment and physical properties by the post-process; and a method of producing the optical element.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: September 27, 2011
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Yuji Nakatsugawa
  • Patent number: 7961273
    Abstract: The invention provides a retardation-controlling optical member that includes a retardation layer obtained by aligning and fixing crosslinkable liquid crystal molecules and columnar structures disposed on the retardation layer. When a liquid crystal cell is formed by use of the retardation-controlling optical member, the columnar structures are effectively inhibited from subsiding in the retardation layer to locally make the cell gap smaller even when pressure is externally applied in a thickness direction of the liquid crystal cell. A sum total of lower bottom areas of columnar structures disposed on a retardation layer is made larger sufficiently compared to a total area of, in particular, an effective display region of a retardation layer surface where the columnar structures are disposed, whereby pressure applied from a thickness direction is dispersed.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: June 14, 2011
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Norihisa Moriya, Shinji Hayashi, Yuji Nakatsugawa
  • Publication number: 20110010006
    Abstract: A robot control system has a portable operating device TP and a robot control device RC. The portable operating device TP is actuated by a rechargeable secondary battery and used to operate a robot R. The robot control device RC is capable of wireless communication with the portable operating device TP and performs automatic operation of the robot R based on teaching data provided by the portable operating device TP. The robot control system causes an emergency stop of the robot R when the wireless communication between the portable operating device TP and the robot control device RC is interrupted. The robot control system further includes a charging device CU, a connection monitoring section 12, and an automatic operation continuing section 11. The charging device CU charges the secondary battery by electrically connecting the portable operating device TP to the robot control device RC.
    Type: Application
    Filed: March 17, 2009
    Publication date: January 13, 2011
    Applicants: Daihen Corporation, NACHI-FUJIKOSHI CORP.
    Inventors: Nobuhiro Tani, Yasuhiro Koujina, Yuji Nakatsugawa
  • Publication number: 20100233817
    Abstract: The invention provides: an optical element that includes a birefringence functional layer constituted of a polymerizable liquid crystal material, in which the birefringence functional layer is formed directly or indirectly on a substrate, and in a post-process carried out thereafter, alignment and characteristics of the birefringence functional layer are not disturbed, with the result that a high quality birefringence control function can be exerted; a liquid crystal display device provided with the optical element; a method of evaluating a birefringence functional layer that is not disturbed in the alignment and physical properties by the post-process; and a method of producing the optical element.
    Type: Application
    Filed: May 20, 2010
    Publication date: September 16, 2010
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventor: Yuji Nakatsugawa
  • Patent number: 7751006
    Abstract: The invention provides: an optical element that includes a birefringence functional layer constituted of a polymerizable liquid crystal material, in which the birefringence functional layer is formed directly or indirectly on a substrate, and in a post-process carried out thereafter, alignment and characteristics of the birefringence functional layer are not disturbed, with the result that a high quality birefringence control function can be exerted; a liquid crystal display device provided with the optical element; a method of evaluating a birefringence functional layer that is not disturbed in the alignment and physical properties by the post-process; and a method of producing the optical element.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: July 6, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Yuji Nakatsugawa
  • Publication number: 20100165256
    Abstract: The invention provides a retardation-controlling optical member that includes a retardation layer obtained by aligning and fixing crosslinkable liquid crystal molecules and columnar structures disposed on the retardation layer. When a liquid crystal cell is formed by use of the retardation-controlling optical member, the columnar structures are effectively inhibited from subsiding in the retardation layer to locally make the cell gap smaller even when pressure is externally applied in a thickness direction of the liquid crystal cell. A sum total of lower bottom areas of columnar structures disposed on a retardation layer is made larger sufficiently compared to a total area of, in particular, an effective display region of a retardation layer surface where the columnar structures are disposed, whereby pressure applied from a thickness direction is dispersed.
    Type: Application
    Filed: January 25, 2008
    Publication date: July 1, 2010
    Applicant: DAI NIPPON PRINTING CO.LTD.
    Inventors: Norihisa Moriya, Shinji Hayashi, Yuji Nakatsugawa
  • Patent number: 7649598
    Abstract: The present invention intends to provide an optical element that can be incorporated in a liquid crystal display device, is provided with a birefringent layer obtained by aligning and polymerizing polymerizable liquid crystal molecules, and, while sufficiently reflecting an actual condition of a liquid crystal display device, can reduce fear that a thickness of a driving liquid crystal layer unexpectedly varies. An optical element includes a light-transmitting base material and a birefringent layer comprising of aligned and polymerized liquid crystal molecules and having a value of indentation depth of 6% or less relative to a thickness of the birefringent layer, wherein said value is measured under conditions where a cylindrical indenter having a diameter of 30 (?m) is applied at a load of 10 mN/sec up to the maximum load of 400 mN.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: January 19, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Yuji Nakatsugawa
  • Patent number: 7554636
    Abstract: The invention provides a retardation control element capable of inhibiting a retardation defect that becomes a cause of light leakage and color shift of a liquid crystal display device from occurring, a method of producing the same, and a liquid crystal display device including such a retardation control element. A method of producing a retardation control element includes: a first step of filtering liquid crystal ink containing crosslinkable liquid crystal molecules with a filter material having a maximum pore diameter in the range of 0.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: June 30, 2009
    Assignee: Dai Nippon Printing
    Inventor: Yuji Nakatsugawa
  • Publication number: 20080088780
    Abstract: The present invention intends to provide an optical element that can be incorporated in a liquid crystal display device, is provided with a birefringent layer obtained by aligning and polymerizing polymerizable liquid crystal molecules, and, while sufficiently reflecting an actual condition of a liquid crystal display device, can reduce fear that a thickness of a driving liquid crystal layer unexpectedly varies. An optical element includes a light-transmitting base material and a birefringent layer comprising of aligned and polymerized liquid crystal molecules and having a value of indentation depth of 6% or less relative to a thickness of the birefringent layer, wherein said value is measured under conditions where a cylindrical indenter having a diameter of 30 (?m) is applied at a load of 10 mN/sec up to the maximum load of 400 mN.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 17, 2008
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventor: Yuji Nakatsugawa
  • Publication number: 20080079877
    Abstract: The invention provides: an optical element that includes a birefringence functional layer constituted of a polymerizable liquid crystal material, in which the birefringence functional layer is formed directly or indirectly on a substrate, and in a post-process carried out thereafter, alignment and characteristics of the birefringence functional layer are not disturbed, with the result that a high quality birefringence control function can be exerted; a liquid crystal display device provided with the optical element; a method of evaluating a birefringence functional layer that is not disturbed in the alignment and physical properties by the post-process; and a method of producing the optical element.
    Type: Application
    Filed: September 24, 2007
    Publication date: April 3, 2008
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventor: Yuji Nakatsugawa
  • Publication number: 20060121392
    Abstract: An optical filter including at least a coloring matter layer that includes a coloring matter having an absorption maximum wavelength in a wavelength region of 800 to 1100 nm and a coloring matter having an absorption maximum in a wavelength region of 570 to 610 nm contained in an identical layer. The coloring matter layer does not substantially contain two or more ionic coloring matter compounds different from each other in cation part. The optical filter can be disposed on the viewing side of a display. By virtue of the above construction, the optical filter and display, even when a plurality of coloring matters are present as a mixture in an identical coloring matter layer, can realize suppression of interaction between coloring matters and do not cause any change in spectral characteristics even under use for a long period of time.
    Type: Application
    Filed: November 21, 2005
    Publication date: June 8, 2006
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventor: Yuji Nakatsugawa
  • Publication number: 20050163958
    Abstract: The present invention provides an optical filter possessing excellent near infrared shielding properties. The optical filter has a laminate structure comprising at least a transparent substrate and a near infrared absorptive layer, which is formed of an acrylic resin containing a near infrared absorptive colorant capable of absorbing a near infrared radiation, stacked on top of each other. The acrylic resin has a birefringence value of 0 (zero) to 15 nm.
    Type: Application
    Filed: October 22, 2004
    Publication date: July 28, 2005
    Inventor: Yuji Nakatsugawa