Patents by Inventor Runa Nakamura

Runa Nakamura 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: 9671528
    Abstract: There is provided an optical sheet which can prevent problems when it is superimposed on another member. The optical sheet includes: a sheet-like base layer; a light control layer having unit shaped elements arranged in a direction parallel to a sheet surface of the base layer; and a light diffusing layer disposed between the base layer and the light control layer. The light diffusing layer includes a binder resin portion and particles dispersed in the binder resin portion. The particles in the binder resin portion includes a single particle and an aggregate formed of aggregated single particles.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: June 6, 2017
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Takayuki Shimada, Fumihiro Arakawa, Satoshi Goishihara, Hiroshi Kojima, Runa Nakamura, Akinobu Ushiyama, Satoko Maenishi, Kazuki Tanaka, Akiko Tomita
  • Patent number: 9261731
    Abstract: A liquid crystal display apparatus comprises: a liquid crystal display panel including a liquid crystal cell between a first polarizing plate and a second polarizing plate; and a surface light source device having a light source unit and a light guide plate. In a polarized light output from the light guide plate, when the normal direction of a light output surface is defined to be at a polar angle of 90°, and the light guiding direction of the light guide plate is defined to be a direction of an azimuth angle of 0°-180°, a ratio La/Lt of integrated intensity La of output light in ranges where the polar angle is 50° to 80° and the azimuth angle is 135° to 225°, 0° to 45°, and 315° to 360° to integrated intensity Lt of total output light is 0.3 or more.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: February 16, 2016
    Assignees: KEIO UNIVERSITY, NITTO DENKO CORPORATION, DAI NIPPON PRINTING CO., LTD., NITTO JUSHI KOGYO CO., LTD.
    Inventors: Yasuhiro Koike, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Tsuyoshi Ishikawa, Eizaburo Higuchi
  • Patent number: 9261640
    Abstract: A liquid crystal display apparatus includes a liquid crystal display panel including a liquid crystal cell between first second polarizing plates; and a surface light source device. The surface light source device includes a light source unit, a light guide plate for outputting first directivity light having directivity of maximum intensity in a first direction, which forms a predetermined angle from a normal direction of the light output surface in a plane approximately parallel to a light guiding direction of light, and having a high ratio of a polarized light component oscillating in the plane and a prism sheet being configured to convert the first directivity light into second directivity light directed in a second direction within a predetermined angle from the normal direction of the light output surface of the light guide plate while substantially maintaining a polarization state of the first directivity light.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: February 16, 2016
    Assignees: KEIO UNIVERSITY, DAI NIPPON PRINTING CO., LTD., NITTO DENKO CORPORATION, NITTO JUSHI KOGYO CO., LTD.
    Inventors: Yasuhiro Koike, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Tsuyoshi Ishikawa, Eizaburo Higuchi
  • 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
  • Publication number: 20150301384
    Abstract: A liquid crystal display apparatus comprises: a liquid crystal display panel including a liquid crystal cell between a first polarizing plate and a second polarizing plate; and a surface light source device having a light source unit and a light guide plate. In a polarized light output from the light guide plate, when the normal direction of a light output surface is defined to be at a polar angle of 90°, and the light guiding direction of the light guide plate is defined to be a direction of an azimuth angle of 0°-180°, a ratio La/Lt of integrated intensity La of output light in ranges where the polar angle is 50° to 80° and the azimuth angle is 135° to 225°, 0° to 45°, and 315° to 360° to integrated intensity Lt of total output light is 0.3 or more.
    Type: Application
    Filed: February 14, 2013
    Publication date: October 22, 2015
    Applicants: KEIO UNIVERSITY, NITTO DENKO CORPORATION, DAI NIPPON PRINTING CO., LTD., NITTO JUSHI KOGYO CO., LTD.
    Inventors: Yasuhiro Koike, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Tsuyoshi Ishikawa, Eizaburo Higuchi
  • Publication number: 20150085470
    Abstract: There is provided an optical sheet which can prevent problems when it is superimposed on another member. The optical sheet includes: a sheet-like base layer; a light control layer having unit shaped elements arranged in a direction parallel to a sheet surface of the base layer; and a light diffusing layer disposed between the base layer and the light control layer. The light diffusing layer includes a binder resin portion and particles dispersed in the binder resin portion. The particles in the binder resin portion include a single particle and an aggregate formed of aggregated single particles.
    Type: Application
    Filed: December 4, 2014
    Publication date: March 26, 2015
    Inventors: Takayuki SHIMADA, Fumihiro ARAKAWA, Satoshi GOISHIHARA, Hiroshi KOJIMA, Runa NAKAMURA, Akinobu USHIYAMA, Satoko MAENISHI, Kazuki TANAKA, Akiko TOMITA
  • Publication number: 20150029442
    Abstract: A liquid crystal display apparatus includes a liquid crystal display panel including a liquid crystal cell between first second polarizing plates; and a surface light source device. The surface light source device includes a light source unit, a light guide plate for outputting first directivity light having directivity of maximum intensity in a first direction, which forms a predetermined angle from a normal direction of the light output surface in a plane approximately parallel to a light guiding direction of light, and having a high ratio of a polarized light component oscillating in the plane and a prism sheet being configured to convert the first directivity light into second directivity light directed in a second direction within a predetermined angle from the normal direction of the light output surface of the light guide plate while substantially maintaining a polarization state of the first directivity light.
    Type: Application
    Filed: February 14, 2013
    Publication date: January 29, 2015
    Applicants: KEIO UNIVERSITY, DAI NIPPON PRINTING CO., LTD., NITTO DENKO CORPORATION, NITTO JUSHI KOGYO CO., LTD.
    Inventors: Yasuhiro Koike, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Tsuyoshi Ishikawa, Eizaburo Higuchi
  • Patent number: 8169707
    Abstract: A sheet-like optical member being difficult to damage a shape of a lens part. The sheet-like optical member includes: a substrate; and a lens part, which is formed on the substrate, is made of an active energy ray-curable resin, and has a plurality of unit prisms. The maximum logarithmic attenuation rate ?E of the lens part measured by a rigid body pendulum method is 0.4 or less.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: May 1, 2012
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Runa Nakamura, Naoyuki Mitsuyasu, Satoko Maenishi, Nobuaki Nakao
  • Publication number: 20110280004
    Abstract: There is provided an optical sheet which can prevent problems when it is superimposed on another member. The optical sheet (10) includes: a sheet-like base layer (32); a light control layer (35) having unit shaped elements (38) arranged in a direction parallel to a sheet surface of the base layer; and a light diffusing layer (40) disposed between the base layer and the light control layer. The light diffusing layer includes a binder resin portion (42) and particles (45) dispersed in the binder resin portion (42). The particles (45) in the binder resin portion (42) includes a single particle (46) and an aggregate (47) formed of aggregated single particles (46).
    Type: Application
    Filed: October 6, 2009
    Publication date: November 17, 2011
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Takayuki Shimada, Fumihiro Arakawa, Satoshi Goishihara, Hiroshi Kojima, Runa Nakamura, Akinobu Ushiyama, Satoko Maenishi, Kazuki Tanaka, Akiko Tomita
  • Patent number: 7812907
    Abstract: A film with alignment film which stably causes liquid crystal alignment and is excellent in adhesion between its constituting layers so as to give a high endurance and an excellent re-workability, and further to provide an optical device using the same. The film with alignment film contains at least a resin substrate and an alignment film, wherein the film is provided with a photocurable resin layer between the resin substrate and the alignment film, the photocurable resin layer being formed by use of a photo-cleaving type photopolymerization initiator. The optical device contains at least a resin substrate, an alignment film, and an optically functional layer, wherein the device is provided with a photocurable resin layer between the resin substrate and the alignment film, the photocurable resin layer being formed by use of a photo-cleaving type photopolymerization initiator.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: October 12, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Runa Nakamura
  • Publication number: 20100159158
    Abstract: An optical functional film exhibiting optical biaxiality which has a high degree of freedom in optical characteristics design. The optical functional film which exhibits optical biaxiality and includes: a substrate; and an optical functional layer formed on the substrate and having a rodlike compound. The rodlike compound forms irregular-random homogeneous alignment in the optical functional layer.
    Type: Application
    Filed: May 14, 2007
    Publication date: June 24, 2010
    Inventors: Takayuki Shibata, Keiji Kashima, Shoji Takeshige, Kenji Shirai, Takeshi Haritani, Yusuke Hiruma, Runa Nakamura, Hiroki Nakagawa, Masanori Fukuda, Takashi Kuroda, Yuya Inomata
  • Publication number: 20100103529
    Abstract: A sheet-like optical member being difficult to damage a shape of a lens part. The sheet-like optical member includes: a substrate; and a lens part, which is formed on the substrate, is made of an active energy ray-curable resin, and has a plurality of unit prisms. The maximum logarithmic attenuation rate ?E of the lens part measured by a rigid body pendulum method is 0.4 or less.
    Type: Application
    Filed: March 27, 2008
    Publication date: April 29, 2010
    Inventors: Runa Nakamura, Naoyuki Mitsuyasu, Satoko Maenishi, Nobuaki Nakao
  • Publication number: 20090268138
    Abstract: A film with alignment film which stably causes liquid crystal alignment and is excellent in adhesion between its constituting layers so as to give a high endurance and an excellent re-workability, and further to provide an optical device using the same. The film with alignment film contains at least a resin substrate and an alignment film, wherein the film is provided with a photocurable resin layer between the resin substrate and the alignment film, the photocurable resin layer being formed by use of a photo-cleaving type photopolymerization initiator. The optical device contains at least a resin substrate, an alignment film, and an optically functional layer, wherein the device is provided with a photocurable resin layer between the resin substrate and the alignment film, the photocurable resin layer being formed by use of a photo-cleaving type photopolymerization initiator.
    Type: Application
    Filed: February 28, 2006
    Publication date: October 29, 2009
    Inventor: Runa Nakamura
  • Publication number: 20090251642
    Abstract: A retardation film that is used as a polarizing plate protective film, thereby making it possible to yield a polarizing plate which is very good in durability and has a viewing angle compensation function. The retardation film has: an optical anisotropic film, in which a relation of nx>ny is realized between a refractive index “nx” in a slow axis direction of an in-plane direction and a refractive index “ny” in a fast axis direction of the in-plane direction; and a retardation layer formed on the optical anisotropic film and containing a liquid crystalline material, in which a relation of nx?ny<nz is realized between refractive indexes “nx” and “ny” in arbitrary directions “x” and “y” of an in-plane direction which are perpendicular to each other and a refractive index “nz” in a thickness direction. The optical anisotropic film uses a transparent substrate having a cellulose derivative.
    Type: Application
    Filed: July 17, 2007
    Publication date: October 8, 2009
    Inventors: Runa Nakamura, Hiroki Nakagawa, Takashi Kuroda, Yuya Inomata, Masanori Fukuda
  • 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: 20080233281
    Abstract: A composition for an aligning film that may have significantly improved adhesion to an optical functional layer (a liquid crystal layer), may significantly improve the alignment of a liquid crystalline compound, and may have excellent durability. The composition for an aligning film is used in a process for producing an optical element which includes a plastic support and, providing on the surface of the plastic support in the following order, an aligning film, and at least one optical functional layer containing a liquid crystalline compound composition. The composition can include A) a nonionic water-soluble etherified polysaccharide and B) water and/or a lower alcohol solvent.
    Type: Application
    Filed: April 29, 2008
    Publication date: September 25, 2008
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Yoshiko Kiyohara, Runa Nakamura, Naoya Ogata
  • 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