Patents by Inventor Keiko Tazaki

Keiko Tazaki 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: 9213929
    Abstract: The pattern printed sheet 1 of the present invention includes a substrate 2 and a non-visible light-reflective transparent pattern 3 printed on a surface of the substrate, wherein an ink for forming the transparent pattern 3 contains a non-visible light-reflective material capable of selectively reflecting a light having a wavelength in a non-visible light range, and the transparent pattern 3 printed on the surface of the substrate 2 has a multilayer structure in section which is repeated at predetermined intervals as observed by a scanning electron microscope, and reflects only a circular polarization component in a predetermined rotation direction relative to an incident light applied thereto.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: December 15, 2015
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keiko Tazaki, Yuichi Miyazaki, Satoko Maenishi, Runa Nakamura, Toshio Yoshihara, Yuudai Yamashita
  • Patent number: 9103970
    Abstract: The present invention provides an optical layered body that has multiple laminated layers of which the refractive indexes are greatly different. The optical layered body can suitably prevent interfacial reflection and interference fringes attributed to the reflection in the interfaces between the layers. The optical layered body has a light-transmitting substrate, and at least an optical functional layer (1) on one surface of the substrate, wherein the refractive index of the optical functional layer (1) in the thickness direction continuously increases from the surface on the light-transmitting substrate side to the surface opposite to the light-transmitting substrate side to show a sigmoid curve.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: August 11, 2015
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Toshiyuki Tanimura, Keiko Tazaki, Yu Morioka, Koji Hashimoto, Kenji Ueno
  • Publication number: 20140071529
    Abstract: The present invention provides an optical layered body that has multiple laminated layers of which the refractive indexes are greatly different. The optical layered body can suitably prevent interfacial reflection and interference fringes attributed to the reflection in the interfaces between the layers. The optical layered body has a light-transmitting substrate, and at least an optical functional layer (1) on one surface of the substrate, wherein the refractive index of the optical functional layer (1) in the thickness direction continuously increases from the surface on the light-transmitting substrate side to the surface opposite to the light-transmitting substrate side to show a sigmoid curve.
    Type: Application
    Filed: January 11, 2013
    Publication date: March 13, 2014
    Inventors: Toshiyuki Tanimura, Keiko Tazaki, Yu Morioka, Koji Hashimoto, Kenji Ueno
  • Patent number: 8466408
    Abstract: Provided is a surface film for a polarizing plate in which transparent patterns having a non-visible light reflective regularity are printed on a surface of a substrate and in which a reflection preventive layer or an antiglare layer is formed thereon or on a back side thereof, wherein an ink constituting the above transparent patterns contains a material reflecting a non-visible light. Capable of being provided is a surface film which can suitably be used for providing additional informations to an image display medium in such a manner that data are input by handwriting directly on a display device and in which the function described above is built-in from the beginning without making it necessary for the user to stick later a sheet having the above function.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: June 18, 2013
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Yuichi Miyazaki, Yasuki Suzuura, Satoko Maenishi, Keiko Tazaki
  • Patent number: 7847915
    Abstract: An optical element including: an alignment substrate; a liquid crystal layer formed on the alignment substrate, made by forming and curing a film of a liquid crystalline material; and a protective layer having high hardness, formed on the liquid crystal layer. The protective layer is for protecting the liquid crystal layer from being deformed by externally exerted forces. Preferably, the protective layer has a modulus of elasticity (=(elastic deformation)/(total deformation)) of 0.6 or more and a plastic deformation of 0.5 ?m or less as determined by pushing an indenter into the protective layer with a test force of 2 mN in accordance with the universal hardness test method.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: December 7, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Tazaki, Koji Ishizaki
  • Patent number: 7663722
    Abstract: An optical element including: an alignment substrate; a liquid crystal layer formed on the alignment substrate, made by forming and curing a film of a liquid crystalline material; and a protective layer having high hardness, formed on the liquid crystal layer. The protective layer is for protecting the liquid crystal layer from being deformed by externally exerted forces. Preferably, the protective layer has a modulus of elasticity (=(elastic deformation)/(total deformation)) of 0.6 or more and a plastic deformation of 0.5 ?m or less as determined by pushing an indenter into the protective layer with a test force of 2 mN in accordance with the universal hardness test method.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: February 16, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Tazaki, Koji Ishizaki
  • Publication number: 20090279170
    Abstract: Provided is a surface film for a polarizing plate in which transparent patterns having a non-visible light reflective regularity are printed on a surface of a substrate and in which a reflection preventive layer or an antiglare layer is formed thereon or on a back side thereof, wherein an ink constituting the above transparent patterns contains a material reflecting a non-visible light. Capable of being provided is a surface film which can suitably be used for providing additional informations to an image display medium in such a manner that data are input by handwriting directly on a display device and in which the function described above is built-in from the beginning without making it necessary for the user to stick later a sheet having the above function.
    Type: Application
    Filed: July 31, 2008
    Publication date: November 12, 2009
    Inventors: Yuichi Miyazaki, Yasuki Suzuura, Satoko Maenishi, Keiko Tazaki
  • Patent number: 7531223
    Abstract: The present invention provides an optical element capable of improving the adhesive property between a refractive index anisotropic layer and an alignment property providing layer for providing alignment property to the refractive index anisotropic layer and further improving the endurance of each of the layers.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: May 12, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Tazaki, Runa Nakamura
  • Patent number: 7527836
    Abstract: The present invention provides an optical element capable of improving the adhesion between the alignment property providing layer, for providing the alignment property to the refractive index anisotropic layer, and the refractive index anisotropic layer, as well as improving durability of each layer.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: May 5, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Tazaki, Runa Nakamura
  • Publication number: 20090015548
    Abstract: Provided is an image projection system including a screen, an input terminal, an image processing unit, an image projector, and invisible light ray-shielding member, characterized in that: the screen has a pattern-printed sheet having reflection patterns for transmitting positional information by reflecting invisible light rays or absorption patterns for transmitting positional information by absorbing invisible light rays; the input terminal has an invisible light ray-applying portion, detects a reflected light ray of an invisible light ray, which is applied from the invisible light ray-applying portion and reflected from a specific site of the pattern-printed sheet, reads positional information of any one of the reflection patterns or any one of the absorption patterns, and outputs the positional information to the image processing unit; the image processing unit converts the positional information input from the input terminal into image information A, and transfers the image information A to the image pro
    Type: Application
    Filed: June 27, 2008
    Publication date: January 15, 2009
    Inventors: Keiko Tazaki, Runa Nakamura, Satoko Maenishi
  • Publication number: 20080230933
    Abstract: The present invention provides an optical element capable of improving the adhesive property between a refractive index anisotropic layer and an alignment property providing layer for. providing alignment property to the refractive index anisotropic layer and further improving the endurance of each of the layers. An optical element 10 has an alignment property providing layer 12 laminated on a transparent base material 11 and a refractive index anisotropic layer 13 laminated on the layer 12. The layer 12 is an alignment layer having alignment limiting force for providing alignment property to the layer 13, and is made of an alignment layer composition capable of expressing the alignment limiting force. The layer 13 is a liquid crystal layer formed by curing (polymerizing) a liquid crystal composition comprising a polymerizable liquid crystal material. A monomer or oligomer having one or more functional groups, together with a polymer, is incorporated into the alignment layer composition.
    Type: Application
    Filed: April 28, 2008
    Publication date: September 25, 2008
    Inventors: Keiko TAZAKI, Runa NAKAMURA
  • Publication number: 20080196830
    Abstract: The present invention provides an optical element capable of improving the adhesion between the alignment property providing layer, for providing the alignment property to the refractive index anisotropic layer, and the refractive index anisotropic layer, as well as improving durability of each layer. An optical element 10 comprises an alignment property providing layer 12 laminated on the transparent base material 11, and a refractive index anisotropic layer 13 laminated on the alignment property providing layer 12. The alignment property providing layer 12 is an alignment film which provides the alignment property to the refractive index anisotropic layer 13. And the alignment property providing layer 12 is made from an alignment film composition capable of exhibiting the alignment limiting force by the photo-alignment method.
    Type: Application
    Filed: April 17, 2008
    Publication date: August 21, 2008
    Inventors: Keiko Tazaki, Runa Nakamura
  • Publication number: 20070290047
    Abstract: The pattern printed sheet 1 of the present invention includes a substrate 2 and a non-visible light-reflective transparent pattern 3 printed on a surface of the substrate, wherein an ink for forming the transparent pattern 3 contains a non-visible light-reflective material capable of selectively reflecting a light having a wavelength in a non-visible light range, and the transparent pattern 3 printed on the surface of the substrate 2 has a multilayer structure in section which is repeated at predetermined intervals as observed by a scanning electron microscope, and reflects only a circular polarization component in a predetermined rotation direction relative to an incident light applied thereto.
    Type: Application
    Filed: May 25, 2007
    Publication date: December 20, 2007
    Inventors: KEIKO TAZAKI, Yuichi Miyazaki, Satoko Maenishi, Runa Nakamura, Toshio Yoshihara, Yuudai Yamashita
  • Patent number: 7224426
    Abstract: An optical element including: an alignment substrate; a liquid crystal layer formed on the alignment substrate, made by forming and curing a film of a liquid crystalline material; and a protective layer having high hardness, formed on the liquid crystal layer. The protective layer is for protecting the liquid crystal layer from being deformed by externally exerted forces. Preferably, the protective layer has a modulus of elasticity (=(elastic deformation)/(total deformation)) of 0.6 or more and a plastic deformation of 0.5 ?m or less as determined by pushing an indenter into the protective layer with a test force of 2 mN in accordance with the universal hardness test method.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: May 29, 2007
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Tazaki, Koji Ishizaki
  • Publication number: 20070091239
    Abstract: An optical element including: an alignment substrate; a liquid crystal layer formed on the alignment substrate, made by forming and curing a film of a liquid crystalline material; and a protective layer having high hardness, formed on the liquid crystal layer. The protective layer is for protecting the liquid crystal layer from being deformed by externally exerted forces. Preferably, the protective layer has a modulus of elasticity (=(elastic deformation)/(total deformation)) of 0.6 or more and a plastic deformation of 0.5 ?m or less as determined by pushing an indenter into the protective layer with a test force of 2 mN in accordance with the universal hardness test method.
    Type: Application
    Filed: July 19, 2006
    Publication date: April 26, 2007
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keiko Tazaki, Koji Ishizaki
  • Publication number: 20070052894
    Abstract: An optical element including: an alignment substrate; a liquid crystal layer formed on the alignment substrate, made by forming and curing a film of a liquid crystalline material; and a protective layer having high hardness, formed on the liquid crystal layer. The protective layer is for protecting the liquid crystal layer from being deformed by externally exerted forces. Preferably, the protective layer has a modulus of elasticity (=(elastic deformation)/(total deformation)) of 0.6 or more and a plastic deformation of 0.5 ?m or less as determined by pushing an indenter into the protective layer with a test force of 2 mN in accordance with the universal hardness test method.
    Type: Application
    Filed: November 6, 2006
    Publication date: March 8, 2007
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keiko Tazaki, Koji Ishizaki
  • Publication number: 20060279865
    Abstract: An optical element, with an improved adhesion strength of the liquid crystal layer, and without substantial deterioration of the optical characteristics (such as transparency deterioration, white turbidity and display irregularity). The optical element has a transparent substrate, an alignment layer, and a liquid crystal layer formed on above-mentioned transparent substrate via the alignment layer. The liquid crystal layer contains an adhesion improving agent; a retardation plate including the above-mentioned optical element; an optical laminated body including the above-mentioned optical element and a polarizing plate; and a display apparatus including the above-mentioned retardation plate or optical laminated body disposed on the optical path.
    Type: Application
    Filed: February 6, 2006
    Publication date: December 14, 2006
    Inventors: Norihito Ito, Takeshi Haritani, Keiko Tazaki, Shoji Takeshige
  • Publication number: 20060141171
    Abstract: The present invention provides an optical element capable of improving the adhesion between the alignment property providing layer, for providing the alignment property to the refractive index anisotropic layer, and the refractive index anisotropic layer, as well as improving durability of each layer. An optical element 10 comprises an alignment property providing layer 12 laminated on the transparent base material 11, and a refractive index anisotropic layer 13 laminated on the alignment property providing layer 12. The alignment property providing layer 12 is an alignment film which provides the alignment property to the refractive index anisotropic layer 13. And the alignment property providing layer 12 is made from an alignment film composition capable of exhibiting the alignment limiting force by the photo-alignment method.
    Type: Application
    Filed: December 22, 2005
    Publication date: June 29, 2006
    Inventors: Keiko Tazaki, Runa Nakamura
  • Publication number: 20060141172
    Abstract: The present invention provides an optical element capable of improving the adhesive property between a refractive index anisotropic layer and an alignment property providing layer for providing alignment property to the refractive index anisotropic layer and further improving the endurance of each of the layers. An optical element 10 has an alignment property providing layer 12 laminated on a transparent base material 11 and a refractive index anisotropic layer 13 laminated on the layer 12. The layer 12 is an alignment layer having alignment limiting force for providing alignment property to the layer 13, and is made of an alignment layer composition capable of expressing the alignment limiting force, The layer 13 is a liquid crystal layer formed by curing (polymerizing) a liquid crystal composition comprising a polymerizable liquid crystal material. A monomer or oligomer having one or more functional groups, together with a polymer, is incorporated into the alignment layer composition.
    Type: Application
    Filed: December 22, 2005
    Publication date: June 29, 2006
    Inventors: Keiko Tazaki, Runa Nakamura
  • Publication number: 20040057007
    Abstract: An optical element including: an alignment substrate; a liquid crystal layer formed on the alignment substrate, made by forming and curing a film of a liquid crystalline material; and a protective layer having high hardness, formed on the liquid crystal layer. The protective layer is for protecting the liquid crystal layer from being deformed by externally exerted forces. Preferably, the protective layer has a modulus of elasticity (=(elastic deformation)/(total deformation)) of 0.6 or more and a plastic deformation of 0.5 &mgr;m or less as determined by pushing an indenter into the protective layer with a test force of 2 mN in accordance with the universal hardness test method.
    Type: Application
    Filed: July 30, 2003
    Publication date: March 25, 2004
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Tazaki, Koji Ishizaki