Patents by Inventor Tomoya Kawashima

Tomoya Kawashima 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: 11150521
    Abstract: The reliability of a spacer is improved in comparison to conventional ones. A light control film which is obtained by sandwiching a liquid crystal layer between first and second laminates that are provided with at least alignment layers and which controls light transmitted therethrough by controlling the alignment of liquid crystal molecules in the liquid crystal layer by driving electrodes that are provided on the first and second laminates. With respect to the first laminate, a base that is formed of a transparent film material is provided with a spacer that maintains the thickness of the liquid crystal layer. With respect to the first and second laminates, the Vickers hardness of the spacer is from 16.9 to 40.2 inclusive, and the Vickers hardness of a part of the second laminate, the part being in contact with the front end of the spacer, is from 11.8 to 35.9 inclusive.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: October 19, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keisuke Miura, Yusuke Hagiwara, Tsubasa Honda, Noriko Katashima, Norio Ishii, Tomoya Kawashima
  • Patent number: 11112670
    Abstract: A light control film and a light control system, which not only simply change the amount of transmitted light but also can be used for a wider range of applications. This light control film includes a first electrode, a second electrode, a liquid crystal material, and a dichroic dye, and has a guest-host type liquid crystal layer in which light transmittance varies with the potential difference between the first electrode and the second electrode, wherein the liquid crystal layer has a first haze value when the potential difference is a first potential difference, has a second haze value when the potential difference is a second potential difference, and has a third haze value higher than at least the second haze value when the potential difference is a third potential difference between the first potential difference and the second potential difference.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: September 7, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Makoto Yamaki, Tomoya Kawashima
  • Publication number: 20210274137
    Abstract: This reflective screen 10 reflects a part of image light beam projected from an image source LS, to display an image. The reflective screen 10 is provided with: a first optical shape layer 12 which has optical transparency and has a plurality of unit optical shapes 121 arranged on a rear surface thereof; and a reflective layer 13 which is formed in at least some of the unit optical shapes 121 and by which a part of incident light is reflected and at least the other part of the incident light is transmitted, wherein a light diffusing action in the direction in which the unit optical shapes 121 are arranged is larger than a light diffusing action in a direction perpendicular to the arrangement direction.
    Type: Application
    Filed: July 18, 2019
    Publication date: September 2, 2021
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Masahiro GOTO, Hiroshi SEKIGUCHI, Kumiko KAMBARA, Tomoya KAWASHIMA
  • Publication number: 20210208445
    Abstract: A method for manufacturing a laminated glass whereby, in a laminated glass comprising a liquid crystal film sandwiched therein and having a three-dimensionally curved surface shape, the formation of wrinkles in the liquid crystal film can be suppressed; and a laminated glass which has a three-dimensionally curved surface shape and in which wrinkles in a liquid crystal film sandwiched therein are suppressed. The method for manufacturing the laminated glass comprises: a heat molding step for heating the liquid crystal film to a temperature higher than the glass transition point of the first base material layer and the second base material layer; and a bonding step for, after completing the heat molding step, heating the laminate, wherein the liquid crystal film is sandwiched between the first glass sheet and the second glass sheet, at a temperature lower than the glass transition point and bonding the same by applying a preset pressure.
    Type: Application
    Filed: November 2, 2018
    Publication date: July 8, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Takao IKEZAWA, Keisuke MIURA, Norio ISHII, Makoto YAMAKI, Yusuke NAKAMURA, Tomoya KAWASHIMA, Yusuke HAGIWARA, Satoru NISHIMA
  • Publication number: 20200326577
    Abstract: The reliability of a spacer is improved in comparison to conventional ones. A light control film which is obtained by sandwiching a liquid crystal layer between first and second laminates that are provided with at least alignment layers and which controls light transmitted therethrough by controlling the alignment of liquid crystal molecules in the liquid crystal layer by driving electrodes that are provided on the first and second laminates. With respect to the first laminate, a base that is formed of a transparent film material is provided with a spacer that maintains the thickness of the liquid crystal layer. With respect to the first and second laminates, the Vickers hardness of the spacer is from 16.9 to 40.2 inclusive, and the Vickers hardness of a part of the second laminate, the part being in contact with the front end of the spacer, is from 11.8 to 35.9 inclusive.
    Type: Application
    Filed: June 26, 2020
    Publication date: October 15, 2020
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keisuke MIURA, Yusuke HAGIWARA, Tsubasa HONDA, Noriko KATASHIMA, Norio ISHII, Tomoya KAWASHIMA
  • Publication number: 20200271964
    Abstract: A light control film and a light control system, which not only simply change the amount of transmitted light but also can be used for a wider range of applications. This light control film includes a first electrode, a second electrode, a liquid crystal material, and a dichroic dye, and has a guest-host type liquid crystal layer in which light transmittance varies with the potential difference between the first electrode and the second electrode, wherein the liquid crystal layer has a first haze value when the potential difference is a first potential difference, has a second haze value when the potential difference is a second potential difference, and has a third haze value higher than at least the second haze value when the potential difference is a third potential difference between the first potential difference and the second potential difference.
    Type: Application
    Filed: March 12, 2018
    Publication date: August 27, 2020
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Makoto YAMAKI, Tomoya KAWASHIMA
  • Patent number: 10732464
    Abstract: The present invention further improves the reliability of a spacer in comparison to conventional ones. A light control film 10 which is obtained by sandwiching a liquid crystal layer 14 between first and second laminates 13, 12 that are provided with at least alignment layers 23A, 23B, and which controls light transmitted therethrough by controlling the alignment of liquid crystal molecules 14A in the liquid crystal layer 14 by driving electrodes 22B, 22A that are provided on the first and second laminates 13, 12. With respect to the first laminate 13, a base 21B that is formed of a transparent film material is provided with a spacer 24 that maintains the thickness of the liquid crystal layer 14. With respect to the first and second laminates 13, 12, the Vickers hardness Xs of the spacer 24 is from 16.9 to 40.2 (inclusive), and the Vickers hardness Xf of a part of the second laminate 12, said part being in contact with the front end of the spacer 24, is from 11.8 to 35.9 (inclusive).
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: August 4, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keisuke Miura, Yusuke Hagiwara, Tsubasa Honda, Noriko Katashima, Norio Ishii, Tomoya Kawashima
  • Patent number: 10684515
    Abstract: A light-modulating cell includes: a pair of polarizing plates (a first polarizing plate and a second polarizing plate); a pair of electrodes (a first transparent electrode and a second transparent electrode) arranged between the pair of polarizing plates (the first polarizing plate and the second polarizing plate); and a pair of alignment films (a first alignment film and a second alignment film) arranged between the pair of electrodes (the first transparent electrode and the second transparent electrode). A plurality of spacers, which support at least any one of the pair of alignment films and are in two-dimensional contact with at least any one of the pair of alignment films, is provided. At least some of the plurality of spacers have an inconstant distance to another spacer positioned at a closest distance.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: June 16, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Yusuke Nakamura, Tomoya Kawashima, Kumiko Kambara, Norio Ishii
  • Patent number: 10649281
    Abstract: A light-modulating cell includes: a pair of polarizing plates (a first polarizing plate and a second polarizing plate); a pair of electrodes (a first transparent electrode and a second transparent electrode) arranged between the pair of polarizing plates (the first polarizing plate and the second polarizing plate); and a pair of alignment films (a first alignment film and a second alignment film) arranged between the pair of electrodes (the first transparent electrode and the second transparent electrode). A plurality of spacers, which support at least any one of the pair of alignment films and are in two-dimensional contact with at least any one of the pair of alignment films, is provided. At least some of the plurality of spacers have an inconstant distance to another spacer positioned at a closest distance.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: May 12, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Yusuke Nakamura, Tomoya Kawashima, Kumiko Kambara, Norio Ishii
  • Publication number: 20190331947
    Abstract: Provided is a laminate which can not only control the amount of external light transmitted, but can also be used as a mirror. A laminate 1 comprises: a first liquid crystal member 100; a reflection type polarizing member 200; and a second liquid crystal member 300. The first liquid crystal member has first liquid crystal cells with changing orientation states, and a first absorption type polarizing member.
    Type: Application
    Filed: October 12, 2017
    Publication date: October 31, 2019
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Yusuke HAGIWARA, Yasunori HAYASHIDA, Tomoya KAWASHIMA, Yukihiro KYOUDEN
  • Publication number: 20190243174
    Abstract: A photochromic system wherein: there are provided a photochromic film and a drive power source; the photochromic film has a liquid crystal layer sandwiched between a first and second laminate, the photochromic film controlling the liquid crystal molecules' orientation of the liquid crystal layer by a VA scheme to control transmitted light; the first laminate is provided with at least a first substrate and electrode; the second laminate is provided with at least a second substrate and electrode; each of the first and second electrode has a sheet resistance of 50-300 ?/?; the distance from a power feed point to the farthest-away position in the surface of the photochromic film is 1,500 mm or less; and the drive power source supplies a power source for driving by a rectangular wave having a frequency of 240 Hz or less.
    Type: Application
    Filed: July 25, 2017
    Publication date: August 8, 2019
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Norio ISHII, Tomoya KAWASHIMA
  • Publication number: 20190121186
    Abstract: The present invention further improves the reliability of a spacer in comparison to conventional ones. A light control film 10 which is obtained by sandwiching a liquid crystal layer 14 between first and second laminates 13, 12 that are provided with at least alignment layers 23A, 23B, and which controls light transmitted therethrough by controlling the alignment of liquid crystal molecules 14A in the liquid crystal layer 14 by driving electrodes 22B, 22A that are provided on the first and second laminates 13, 12. With respect to the first laminate 13, a base 21B that is formed of a transparent film material is provided with a spacer 24 that maintains the thickness of the liquid crystal layer 14. With respect to the first and second laminates 13, 12, the Vickers hardness Xs of the spacer 24 is from 16.9 to 40.2 (inclusive), and the Vickers hardness Xf of a part of the second laminate 12, said part being in contact with the front end of the spacer 24, is from 11.8 to 35.9 (inclusive).
    Type: Application
    Filed: April 20, 2017
    Publication date: April 25, 2019
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keisuke MIURA, Yusuke HAGIWARA, Tsubasa HONDA, Noriko KATASHIMA, Norio ISHII, Tomoya KAWASHIMA
  • Publication number: 20180284514
    Abstract: A light-modulating cell includes: a pair of polarizing plates (a first polarizing plate and a second polarizing plate); a pair of electrodes (a first transparent electrode and a second transparent electrode) arranged between the pair of polarizing plates (the first polarizing plate and the second polarizing plate); and a pair of alignment films (a first alignment film and a second alignment film) arranged between the pair of electrodes (the first transparent electrode and the second transparent electrode). A plurality of spacers, which support at least any one of the pair of alignment films and are in two-dimensional contact with at least any one of the pair of alignment films, is provided. At least some of the plurality of spacers have an inconstant distance to another spacer positioned at a closest distance.
    Type: Application
    Filed: September 29, 2016
    Publication date: October 4, 2018
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Yusuke NAKAMURA, Tomoya KAWASHIMA, Kumiko KAMBARA, Norio ISHII
  • Patent number: 9217925
    Abstract: A pattern phase difference film, which is used to display 3D images using a passive system, and provides a method for producing a pattern phase difference film that can be manufactured with high precision, easily and in large quantities. A mask, which has slits that are made narrow compared to the width of a region that is to undergo exposure treatment and are provided for exposure treatment, is manufactured.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: December 22, 2015
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Hiroyuki Nishimura, Yoshihide Nakao, Tomoya Kawashima, Kazuki Yamada, Keiji Kashima
  • Patent number: 8871410
    Abstract: The present invention pertains to a pattern phase difference film, which is used to display 3D images using a passive system, and provides a method for producing a pattern phase difference film that can be manufactured with high precision, easily and in large quantities. In a mask provided for manufacturing an alignment film, slits, which are provided for exposure treatment, are made so as to gradually narrow toward the ends in the longitudinal direction.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: October 28, 2014
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroyuki Nishimura, Yoshihide Nakao, Tomoya Kawashima, Keiji Kashima
  • Publication number: 20140199528
    Abstract: A pattern phase difference film, which is used to display 3D images using a passive system, and provides a method for producing a pattern phase difference film that can be manufactured with high precision, easily and in large quantities. A mask, which has slits that are made narrow compared to the width of a region that is to undergo exposure treatment and are provided for exposure treatment, is manufactured.
    Type: Application
    Filed: August 29, 2012
    Publication date: July 17, 2014
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Hiroyuki Nishimura, Yoshihide Nakao, Tomoya Kawashima, Kazuki Yamada, Keiji Kashima
  • Publication number: 20140178597
    Abstract: The present invention pertains to a pattern phase difference film, which is used to display 3D images using a passive system, and provides a method for producing a pattern phase difference film that can be manufactured with high precision, easily and in large quantities. In a mask provided for manufacturing an alignment film, slits, which are provided for exposure treatment, are made so as to gradually narrow toward the ends in the longitudinal direction.
    Type: Application
    Filed: August 2, 2012
    Publication date: June 26, 2014
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Hiroyuki Nishimura, Yoshihide Nakao, Tomoya Kawashima, Keiji Kashima
  • Patent number: 7652732
    Abstract: There are provided a substrate which has solved an unsatisfactory adhesion problem of a seal part in a liquid crystal cell comprising a retardation layer provided on the inner side of the cell, and a liquid crystal cell using the substrate. A black matrix layer 12 formed of a metal and its picture frame part 12A, a color filter layer 13, and a retardation layer 14 are stacked on a substrate 11, and an area including at least the picture frame part 12A is an area to be sealed.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: January 26, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Kawashima, Norihisa Moriya
  • Patent number: 7643109
    Abstract: There are provided a substrate which has solved an unsatisfactory adhesion problem of a seal part in a liquid crystal cell comprising a retardation layer provided on the inner side of the cell, and a liquid crystal cell using the substrate. A color filter substrate includes a substrate 11, and at least a black matrix layer 12, a color filter layer 13, and a retardation layer 14 stacked on the substrate 11. The black matrix layer 12 and the color filter layer 13 are stacked on the substrate it while providing a margin around the periphery of the substrate 11. The retardation layer 14 is stacked on the black matrix layer 12 and the color filter layer 13 in a larger area than the area where the black matrix layer 12 and the color filter layer 13 are stacked. The substrate 11 in its margin, where neither the black matrix layer 12 nor the color filter layer 13 is stacked, is a predetermined seal area.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: January 5, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Kawashima, Norihisa Moriya
  • Patent number: 7643110
    Abstract: There are provided a substrate which has solved an unsatisfactory adhesion problem of a seal part in a liquid crystal cell comprising a retardation layer provided on the inner side of the cell, and a liquid crystal cell using the substrate. A black matrix layer 12 formed of a resin composition containing a black colorant and its picture frame part 12A, a color filter layer 13, and a retardation layer 14 are stacked on a substrate 11, and an area including at least the picture frame part 12A is an area to be sealed.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: January 5, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Kawashima, Norihisa Moriya