Patents by Inventor Koujiro Ohkawa

Koujiro Ohkawa 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).

  • Publication number: 20240345308
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate is characterized in that the light guide plate has a light entrance surface through which light enters, a light exit surface intersecting with the light entrance surface and through which light is output, and an opposite surface facing the light entrance surface, wherein the light entering through the light entrance surface is guided to the opposite surface side and output from the light exit surface, and the refractive index Nx in a direction perpendicular to the light entrance surface is higher than the refractive index Ny in a direction parallel to the light exit surface and parallel to the light entrance surface.
    Type: Application
    Filed: June 24, 2024
    Publication date: October 17, 2024
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei KOMIZO, Tetsuya SADAHIRO, Hironori HASHIGUCHI, Koujiro OHKAWA
  • Patent number: 12092853
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate is characterized in that the light guide plate has a light entrance surface through which light enters, a light exit surface intersecting with the light entrance surface and through which light is output, and an opposite surface facing the light entrance surface, wherein the light entering through the light entrance surface is guided to the opposite surface side and output from the light exit surface, and the refractive index Nx in a direction perpendicular to the light entrance surface is higher than the refractive index Ny in a direction parallel to the light exit surface and parallel to the light entrance surface.
    Type: Grant
    Filed: November 8, 2023
    Date of Patent: September 17, 2024
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei Komizo, Tetsuya Sadahiro, Hironori Hashiguchi, Koujiro Ohkawa
  • Publication number: 20240077665
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate is characterized in that the light guide plate has a light entrance surface through which light enters, a light exit surface intersecting with the light entrance surface and through which light is output, and an opposite surface facing the light entrance surface, wherein the light entering through the light entrance surface is guided to the opposite surface side and output from the light exit surface, and the refractive index Nx in a direction perpendicular to the light entrance surface is higher than the refractive index Ny in a direction parallel to the light exit surface and parallel to the light entrance surface.
    Type: Application
    Filed: November 8, 2023
    Publication date: March 7, 2024
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei KOMIZO, Tetsuya SADAHIRO, Hironori HASHIGUCHI, Koujiro OHKAWA
  • Publication number: 20230055455
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate is characterized in that the light guide plate has a light entrance surface through which light enters, a light exit surface intersecting with the light entrance surface and through which light is output, and an opposite surface facing the light entrance surface, wherein the light entering through the light entrance surface is guided to the opposite surface side and output from the light exit surface, and the refractive index Nx in a direction perpendicular to the light entrance surface is higher than the refractive index Ny in a direction parallel to the light exit surface and parallel to the light entrance surface.
    Type: Application
    Filed: October 13, 2022
    Publication date: February 23, 2023
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei KOMIZO, Tetsuya SADAHIRO, Hironori HASHIGUCHI, Koujiro OHKAWA
  • Patent number: 11513276
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate (12) is characterized in that the light guide plate has a light entrance surface (12a) through which light enters, a light exit surface (12c) intersecting with the light entrance surface (12a) and through which light is output, and an opposite surface (12b) facing the light entrance surface (12a), wherein the light entering through the light entrance surface (12a) is guided to the opposite surface (12b) side and output from the light exit surface (12c), and the refractive index Nx in a direction perpendicular to the light entrance surface (12a) is higher than the refractive index Ny in a direction parallel to the light exit surface (12c) and parallel to the light entrance surface (12a).
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: November 29, 2022
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei Komizo, Tetsuya Sadahiro, Hironori Hashiguchi, Koujiro Ohkawa
  • Publication number: 20220185238
    Abstract: A heating plate includes: a pair of glass plates; a conductive pattern disposed between the pair of glass plates and defining a plurality of opening areas; and a joint layer disposed between the conductive pattern and at least one of the pair of glass plates; wherein the conductive pattern includes a plurality of connection elements that extend between two branch points to define the opening areas; and a rate of the connection elements, which are straight line segments connecting the two branch points, relative to the plurality of connection elements, is less than 20%.
    Type: Application
    Filed: March 7, 2022
    Publication date: June 16, 2022
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Hirotoshi SUETSUGU, Manabu HIRAKAWA, Satoshi GOISHIHARA, Koichi KINOSHITA, Hidenori NAKAMURA, Koujiro OHKAWA, Tetsuo MATSUKURA, Isao INOUE
  • Publication number: 20220185237
    Abstract: A heating plate includes: a pair of glass plates; a conductive pattern disposed between the pair of glass plates and defining a plurality of opening areas; and a joint layer disposed between the conductive pattern and at least one of the pair of glass plates; wherein the conductive pattern includes a plurality of connection elements that extend between two branch points to define the opening areas; and a rate of the connection elements, which are straight line segments connecting the two branch points, relative to the plurality of connection elements, is less than 20%.
    Type: Application
    Filed: March 4, 2022
    Publication date: June 16, 2022
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Hirotoshi SUETSUGU, Manabu HIRAKAWA, Satoshi GOISHIHARA, Koichi KINOSHITA, Hidenori NAKAMURA, Koujiro OHKAWA, Tetsuo MATSUKURA, Isao INOUE
  • Patent number: 11338774
    Abstract: A heating plate includes: a pair of glass plates; a conductive pattern disposed between the pair of glass plates and defining a plurality of opening areas; and a joint layer disposed between the conductive pattern and at least one of the pair of glass plates; wherein the conductive pattern includes a plurality of connection elements that extend between two branch points to define the opening areas; and a rate of the connection elements, which are straight line segments connecting the two branch points, relative to the plurality of connection elements, is less than 20%.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: May 24, 2022
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi Suetsugu, Manabu Hirakawa, Satoshi Goishihara, Koichi Kinoshita, Hidenori Nakamura, Koujiro Ohkawa, Tetsuo Matsukura, Isao Inoue
  • Patent number: 11299128
    Abstract: A heating plate includes: a pair of glass plates; a conductive pattern disposed between the pair of glass plates and defining a plurality of opening areas; and a joint layer disposed between the conductive pattern and at least one of the pair of glass plates; wherein the conductive pattern includes a plurality of connection elements that extend between two branch points to define the opening areas; and a rate of the connection elements, which are straight line segments connecting the two branch points, relative to the plurality of connection elements, is less than 20%.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: April 12, 2022
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi Suetsugu, Manabu Hirakawa, Satoshi Goishihara, Koichi Kinoshita, Hidenori Nakamura, Koujiro Ohkawa, Tetsuo Matsukura, Isao Inoue
  • Publication number: 20210088710
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate (12) is characterized in that the light guide plate has a light entrance surface (12a) through which light enters, a light exit surface (12c) intersecting with the light entrance surface (12a) and through which light is output, and an opposite surface (12b) facing the light entrance surface (12a), wherein the light entering through the light entrance surface (12a) is guided to the opposite surface (12b) side and output from the light exit surface (12c), and the refractive index Nx in a direction perpendicular to the light entrance surface (12a) is higher than the refractive index Ny in a direction parallel to the light exit surface (12c) and parallel to the light entrance surface (12a).
    Type: Application
    Filed: April 16, 2018
    Publication date: March 25, 2021
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei KOMIZO, Tetsuya SADAHIRO, Hironori HASHIGUCHI, Koujiro OHKAWA
  • Patent number: 10912155
    Abstract: A heating plate 10 includes: a pair of glass plates 11, 12; a conductive pattern 40, 70 disposed between the pair of glass plates 11, 12 and defining a plurality of opening areas 43, 73; and a joint layer 13, 14 disposed between the conductive pattern 40, 70 and at least one of the pair of glass plates 11, 12; wherein the conductive pattern 40, 70 includes a plurality of connection elements 44, 74 that extend between two branch points 42, 72 to define the opening areas 43, 73; and a total value of lengths of straight line segments connecting the two branch points 42, 72 is less than 20% of a total value of the plurality of connection elements 44, 74.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: February 2, 2021
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi Suetsugu, Manabu Hirakawa, Satoshi Goishihara, Koichi Kinoshita, Hidenori Nakamura, Koujiro Ohkawa, Tetsuo Matsukura, Isao Inoue
  • Patent number: 10384649
    Abstract: A heating plate 10 includes: a pair of glass plates 11, 12; a conductive pattern 40, 70 disposed between the pair of glass plates 11, 12 and defining a plurality of opening areas 43, 73; and a joint layer 13, 14 disposed between the conductive pattern 40, 70 and at least one of the pair of glass plates 11, 12; wherein the conductive pattern 40, 70 includes a plurality of connection elements 44, 74 that extend between two branch points 42, 72 to define the opening areas 43, 73; and a rate of the connection elements 44, 74, which are straight line segments connecting the two branch points 42, 72, relative to the plurality of connection elements 44, 74, is less than 20%.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: August 20, 2019
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi Suetsugu, Manabu Hirakawa, Satoshi Goishihara, Koichi Kinoshita, Hidenori Nakamura, Koujiro Ohkawa, Tetsuo Matsukura, Isao Inoue
  • Publication number: 20190248336
    Abstract: A heating plate includes: a pair of glass plates; a conductive pattern disposed between the pair of glass plates and defining a plurality of opening areas; and a joint layer disposed between the conductive pattern and at least one of the pair of glass plates; wherein the conductive pattern includes a plurality of connection elements that extend between two branch points to define the opening areas; and a rate of the connection elements, which are straight line segments connecting the two branch points, relative to the plurality of connection elements, is less than 20%.
    Type: Application
    Filed: April 24, 2019
    Publication date: August 15, 2019
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi SUETSUGU, Manabu Hirakawa, Satoshi Goishihara, Koichi Kinoshita, Hidenori Nakamura, Koujiro Ohkawa, Tetsuo Matsukura, Isao Inoue
  • Patent number: 10315625
    Abstract: A heating plate 10 includes: a pair of glass plates 11, 12; a conductive pattern 40, 70 disposed between the pair of glass plates 11, 12 and defining a plurality of opening areas 43, 73; and a joint layer 13, 14 disposed between the conductive pattern 40, 70 and at least one of the pair of glass plates 11, 12; wherein the conductive pattern 40, 70 includes a plurality of connection elements 44, 74 that extend between two branch points 42, 72 to define the opening areas 43, 73; and a rate of the connection elements 44, 74, which are straight line segments connecting the two branch points 42, 72, relative to the plurality of connection elements 44, 74, is less than 20%.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: June 11, 2019
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi Suetsugu, Manabu Hirakawa, Satoshi Goishihara, Koichi Kinoshita, Hidenori Nakamura, Koujiro Ohkawa, Tetsuo Matsukura, Isao Inoue
  • Publication number: 20170223779
    Abstract: A heating plate 10 includes: a pair of glass plates 11, 12; a conductive pattern 40, 70 disposed between the pair of glass plates 11, 12 and defining a plurality of opening areas 43, 73; and a joint layer 13, 14 disposed between the conductive pattern 40, 70 and at least one of the pair of glass plates 11, 12; wherein the conductive pattern 40, 70 includes a plurality of connection elements 44, 74 that extend between two branch points 42, 72 to define the opening areas 43, 73; and a total value of lengths of straight line segments connecting the two branch points 42, 72 is less than 20% of a total value of the plurality of connection elements 44, 74.
    Type: Application
    Filed: March 28, 2017
    Publication date: August 3, 2017
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi SUETSUGU, Manabu HIRAKAWA, Satoshi GOISHIHARA, Koichi KINOSHITA, Hidenori NAKAMURA, Koujiro OHKAWA, Tetsuo MATSUKURA, Isao INOUE
  • Publication number: 20160311402
    Abstract: A heating plate 10 includes: a pair of glass plates 11, 12; a conductive pattern 40, 70 disposed between the pair of glass plates 11, 12 and defining a plurality of opening areas 43, 73; and a joint layer 13, 14 disposed between the conductive pattern 40, 70 and at least one of the pair of glass plates 11, 12; wherein the conductive pattern 40, 70 includes a plurality of connection elements 44, 74 that extend between two branch points 42, 72 to define the opening areas 43, 73; and a rate of the connection elements 44, 74, which are straight line segments connecting the two branch points 42, 72, relative to the plurality of connection elements 44, 74, is less than 20%.
    Type: Application
    Filed: November 17, 2015
    Publication date: October 27, 2016
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Hirotoshi SUETSUGU, Manabu HIRAKAWA, Satoshi GOISHIHARA, Koichi KINOSHITA, Hidenori NAKAMURA, Koujiro OHKAWA, Tetsuo MATSUKURA, Isao INOUE
  • Patent number: 8796543
    Abstract: An organic thin-film solar cell element is provided including either of the following embodiments: an electron hole transporting layer including an electron-donating electroconductive polymer material and an electron-accepting electroconductive polymer material, and a layer selected from the group consisting of the electron hole transporting layer, a hole transporting layer comprising an electron-donating electroconductive polymer material, and an electron transporting layer comprising an electron-accepting electroconductive polymer material directly laminated onto each other; or three or more layers selected from the group consisting of the electron hole transporting layer, the hole transporting layer, and the electron transporting layer directly laminated onto each other.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: August 5, 2014
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroyuki Suzuki, Koujiro Ohkawa
  • Patent number: 8497140
    Abstract: An encapsulant layer for a photovoltaic module enabling recovering and recycling or reusing of reutilizeable resources such as a transparent front face substrate and photovoltaic cell and the like among constituents of a photovoltaic module, and a method for manufacturing a regenerated photovoltaic cell and a regenerated transparent front face substrate. The photovoltaic module is formed by laminating: a transparent front face substrate; a photovoltaic cell carrying a wiring electrode and a takeoff electrode, and an encapsulant layer is placed on at least one surface; and a rear face protecting sheet. The encapsulant layer is a separable layer formed mainly of a thermoplastic resin, and an output maintenance factor of photoelectronic power of the photovoltaic module using the encapsulant layer is in a range of 80% to 100%.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: July 30, 2013
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kasumi Ol, Takaki Miyachi, Isao Inoue, Koujiro Ohkawa, Hiroki Nakagawa
  • Publication number: 20110183442
    Abstract: An encapsulant layer for a photovoltaic module enabling recovering and recycling or reusing of reutilizeable resources such as a transparent front face substrate and photovoltaic cell and the like among constituents of a photovoltaic module, and a method for manufacturing a regenerated photovoltaic cell and a regenerated transparent front face substrate. The photovoltaic module is formed by laminating: a transparent front face substrate; a photovoltaic cell carrying a wiring electrode and a takeoff electrode, and an encapsulant layer is placed on at least one surface; and a rear face protecting sheet. The encapsulant layer is a separable layer formed mainly of a thermoplastic resin, and an output maintenance factor of photoelectronic power of the photovoltaic module using the encapsulant layer is in a range of 80% to 100%.
    Type: Application
    Filed: March 25, 2011
    Publication date: July 28, 2011
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kasumi OI, Takaki MIYACHI, Isao INOUE, Koujiro OHKAWA, Hiroki NAKAGAWA
  • Patent number: 7935884
    Abstract: An encapsulant layer for a photovoltaic module enabling recovering and recycling or reusing of reutilizeable resources such as a transparent front face substrate and photovoltaic cell and the like among constituents of a photovoltaic module, and a method for manufacturing a regenerated photovoltaic cell and a regenerated transparent front face substrate. The photovoltaic module is formed by laminating: a transparent front face substrate; a photovoltaic cell carrying a wiring electrode and a takeoff electrode, and an encapsulant layer is placed on at least one surface; and a rear face protecting sheet. The encapsulant layer is a separable layer formed mainly of a thermoplastic resin, and an output maintenance factor of photoelectronic power of the photovoltaic module using the encapsulant layer is in a range of 80% to 100%.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: May 3, 2011
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kasumi Oi, Takaki Miyachi, Isao Inoue, Koujiro Ohkawa, Hiroki Nakagawa