Patents by Inventor Hiroaki Segawa

Hiroaki Segawa 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: 20220365265
    Abstract: Provided is an optical film that can suppress rainbow unevenness when viewed with the naked eyes without increasing the in-plane phase difference. The optical film has a low-refractive index layer on a plastic film, the plastic film is a biaxially stretched plastic film with an in-plane phase difference of 2500 nm or less, the low-refractive index layer is located on the outermost surface, and the optical film has a region in which ?Eab satisfies specific conditions, wherein the ?Eab is calculated from the differences between the L* value, the a* value, and the b* value obtained by measuring a laminate 1 including the optical film, the polarizer, and the surface light source under specific conditions and the L* value, the a* value, and the b* value obtained by measuring a laminate 2 including the polarizer and the surface light source under specific conditions, respectively.
    Type: Application
    Filed: September 30, 2020
    Publication date: November 17, 2022
    Inventors: Shosei KUBOTA, Yoshiko TANAKA, Norio ISHII, Takashi KURODA, Hiroaki SEGAWA, Akinobu USHIYAMA
  • Publication number: 20220342135
    Abstract: Provided are an optical biaxially stretched plastic film, a polarizing plate, and an image display device that can suppress blackouts when viewed with polarized sunglasses, polarized goggles or the like without increasing the in-plane phase difference. In addition, a method for selecting an optical biaxially stretched plastic film is provided. The optical biaxially stretched plastic film has a region satisfying condition 1 and condition 2 below: <Condition 1> the difference between a luminance obtained in a specific measurement 1 and a luminance obtained in a specific measurement 2 (L1.n?L2.n) is calculated at each of 100 measurement points, and the “luminance difference variation 3?” calculated from the luminance differences at the 100 measurement points is 100 or more; and <Condition 2> the in-plane phase difference (Re) is 2500 nm or less.
    Type: Application
    Filed: September 30, 2020
    Publication date: October 27, 2022
    Inventors: Yoshiko TANAKA, Shosei KUBOTA, Norio ISHII, Takashi KURODA, Hiroaki SEGAWA, Akinobu USHIYAMA
  • Patent number: 11169308
    Abstract: Disclosed is a color material dispersion liquid for color filter, which has excellent heat resistance and is able to form a high-luminance coating film. The color material dispersion liquid for color filters includes (A) a color material, (B) a dispersant and (C) a solvent. The color material (A) contains (A-1) a color material represented by the following general formula (I) and (A-2) a metal lake color material of a rhodamine-based acid dye: (symbols in the general formula (I) are as described in the Description.).
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: November 9, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Michihiro Ogura, Tomoki Murata, Fumiyasu Murakami, Masato Okada, Hiroaki Segawa
  • Publication number: 20200062016
    Abstract: A thermal transfer sheet which can prevent a kick and a scumming, and can form a photographic tone color image of high quality with a continuous tone image by sublimation transfer; a coating liquid for colorant layer to be used for forming the colorant layer of this thermal transfer sheet; a method for manufacturing this thermal transfer sheet; and image forming method employing this thermal transfer sheet. The problem is solved by a thermal transfer sheet (1) in which at least a colorant layer (3) is layered on a substrate sheet (2), wherein the colorant layer (3) contains a predetermined solvent, a colorant (10x) dispersible in the predetermined solvent, a dispersant, and a binder resin, and the dispersant being one or more selected from the group consisting of polyether-based dispersants, graft type polymer dispersants, acryl-based block type polymer dispersants, urethane-based polymer dispersants and azo-based dispersants.
    Type: Application
    Filed: November 1, 2019
    Publication date: February 27, 2020
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kazuya YOSHIDA, Hiroaki SEGAWA, Tomohiko IMODA, Yoshimasa KOBAYASHI, Tomoko SUZUKI, Hiroyuki HASEGAWA, Kano SAKAMOTO
  • Patent number: 10570287
    Abstract: Disclosed is a non-aqueous dispersant which is a graft copolymer comprising a constitutional unit represented by the following general formula (II) and at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I?), or which is a block copolymer comprising a block portion containing a constitutional unit represented by the following general formula (III) and a block portion containing at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I?):
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: February 25, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Michihiro Ogura, Tomoki Murata, Fumiyasu Murakami, Masato Okada, Hiroaki Segawa
  • Patent number: 10525757
    Abstract: The purpose of the present invention is to provide a thermal transfer sheet which can prevent a kick and a scumming, and can form a photographic tone color image of high quality with a continuous tone image by sublimation transfer, while expanding the range of choices for colorants to be included in a colorant layer; a coating liquid for colorant layer to be used for forming the colorant layer of this thermal transfer sheet; a method for manufacturing this thermal transfer sheet; and image forming method employing this thermal transfer sheet.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: January 7, 2020
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kazuya Yoshida, Hiroaki Segawa, Tomohiko Imoda, Yoshimasa Kobayashi, Tomoko Suzuki, Hiroyuki Hasegawa, Kano Sakamoto
  • Publication number: 20190227209
    Abstract: The present invention is to provide a color material dispersion liquid for color filter, which has excellent heat resistance and is able to form a high-luminance coating film. Disclosed is a color material dispersion liquid for color filters, including: (A) a color material, (B) a dispersant and (C) a solvent, wherein the color material (A) contains (A-1) a color material represented by the following general formula (I) and (A-2) a metal lake color material of a rhodamine-based acid dye: (symbols in the general formula (I) are as described in the Description.
    Type: Application
    Filed: April 2, 2019
    Publication date: July 25, 2019
    Inventors: Michihiro OGURA, Tomoki MURATA, Fumiyasu MURAKAMI, Masato OKADA, Hiroaki SEGAWA
  • Patent number: 10317592
    Abstract: Disclosed is a color material dispersion liquid for color filter, which has excellent heat resistance and is able to form a high-luminance coating film. The color material dispersion liquid for color filters includes (A) a color material, (B) a dispersant and (C) a solvent.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: June 11, 2019
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Michihiro Ogura, Tomoki Murata, Fumiyasu Murakami, Masato Okada, Hiroaki Segawa
  • Publication number: 20170348992
    Abstract: The purpose of the present invention is to provide a thermal transfer sheet which can prevent a kick and a scumming, and can form a photographic tone color image of high quality with a continuous tone image by sublimation transfer, while expanding the range of choices for colorants to be included in a colorant layer; a coating liquid for colorant layer to be used for forming the colorant layer of this thermal transfer sheet; a method for manufacturing this thermal transfer sheet; and image forming method employing this thermal transfer sheet.
    Type: Application
    Filed: August 18, 2017
    Publication date: December 7, 2017
    Inventors: Kazuya YOSHIDA, Hiroaki SEGAWA, Tomohiko IMODA, Yoshimasa KOBAYASHI, Tomoko SUZUKI, Hiroyuki HASEGAWA, Kano SAKAMOTO
  • Patent number: 9764580
    Abstract: The purpose of the present invention is to provide a thermal transfer sheet which can prevent a kick and a scumming, and can form a photographic tone color image of high quality with a continuous tone image by sublimation transfer, while expanding the range of choices for colorants to be included in a colorant layer; a coating liquid for colorant layer to be used for forming the colorant layer of this thermal transfer sheet; a method for manufacturing this thermal transfer sheet; and image forming method employing this thermal transfer sheet.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: September 19, 2017
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kazuya Yoshida, Hiroaki Segawa, Tomohiko Imoda, Yoshimasa Kobayashi, Tomoko Suzuki, Hiroyuki Hasegawa, Kano Sakamoto
  • Patent number: 9625615
    Abstract: Disclosed is a non-aqueous dispersant which is excellent in dispersibility and dispersion stability and able to form a resin layer with excellent hydrolysis resistance; a color material dispersion liquid containing the non-aqueous dispersant; and a color resin composition containing the non-aqueous dispersant.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: April 18, 2017
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Michihiro Ogura, Tomoki Murata, Hiroaki Segawa
  • Publication number: 20160376443
    Abstract: Disclosed is a non-aqueous dispersant which is a graft copolymer comprising a constitutional unit represented by the following general formula (II) and at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I?), or which is a block copolymer comprising a block portion containing a constitutional unit represented by the following general formula (III) and a block portion containing at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I?):
    Type: Application
    Filed: October 2, 2014
    Publication date: December 29, 2016
    Inventors: Michihiro OGURA, Tomoki MURATA, Fumiyasu MURAKAMI, Masato OKADA, Hiroaki SEGAWA
  • Patent number: 9513418
    Abstract: An object of the present invention is to provide: a color material dispersion liquid which is able to form a coating film with high luminance, excellent heat resistance and excellent light resistance. Disclosed is a color material dispersion liquid comprising a color material represented by the following general formula (I), a specific dispersant, and a specific solvent, wherein molybdenum and tungsten are contained in a polyoxometalate anion in the color material, and a molar ratio between the molybdenum and the tungsten is 0.4:99.6 to 15:85: (Symbols shown in the general formula (I) are described in the Description.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: December 6, 2016
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Masato Okada, Daisuke Endo, Michihiro Ogura, Tomoki Murata, Hiroaki Segawa
  • Publication number: 20160282530
    Abstract: Disclosed is a color material dispersion liquid for color filter, which has excellent heat resistance and is able to form a high-luminance coating film. The color material dispersion liquid for color filters includes (A) a color material, (B) a dispersant and (C) a solvent.
    Type: Application
    Filed: July 16, 2014
    Publication date: September 29, 2016
    Inventors: Michihiro OGURA, Tomoki MURATA, Fumiyasu MURAKAMI, Masato OKADA, Hiroaki SEGAWA
  • Publication number: 20160238757
    Abstract: An object of the present invention is to provide: a color material dispersion liquid which is able to form a coating film with high luminance, excellent heat resistance and excellent light resistance. Disclosed is a color material dispersion liquid comprising a color material represented by the following general formula (I), a specific dispersant, and a specific solvent, wherein molybdenum and tungsten are contained in a polyoxometalate anion in the color material, and a molar ratio between the molybdenum and the tungsten is 0.4:99.6 to 15:85: (Symbols shown in the general formula (I) are described in the Description.
    Type: Application
    Filed: April 28, 2016
    Publication date: August 18, 2016
    Inventors: Masato OKADA, Daisuke ENDO, Michihiro OGURA, Tomoki MURATA, Hiroaki SEGAWA
  • Patent number: 9401559
    Abstract: An electrical connector having terminals at different heights includes: a housing having a vertical wall provided with a first hole and a second hole on the counter mating side thereof; a first terminal press-fitted into the first hole; and a second terminal press-fitted into the second hole. A recessed portion is provided between the first hole and the second hole in the vertical wall. A first press-fitting portion is press-fitted into the vertical wall by coming into pressure contact with, among the wall surfaces constituting the first hole in the vertical wall, the wall surfaces on the two width direction sides, and a second press-fitting portion is press-fitted into the vertical wall by coming into pressure contact with, among the wall surfaces constituting the second hole in the vertical wall, the wall surfaces on the two width direction sides and the wall surfaces on the two height direction sides.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: July 26, 2016
    Assignee: J.S.T. MFG. CO., LTD.
    Inventors: Satoshi Ota, Hiroaki Segawa
  • Patent number: 9389348
    Abstract: The present invention is to provide a color material dispersion liquid which is able to form a high-luminance coating film having excellent heat resistance, with adjusting the color tone of the coating film to a desired color tone. Disclosed is a color material dispersion liquid containing: (A) a color material, (B) a dispersant and (C) a solvent, wherein the color material (A) contains a color material (A-1) in which at least a cation represented by the following general formula (I) and a monovalent anion represented by the following general formula (II) form a salt: (symbols in the general formulae (I) and (II) are as described in the Description.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: July 12, 2016
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Tomoki Murata, Michihiro Ogura, Masato Okada, Daisuke Endo, Fumiyasu Murakami, Hiroaki Segawa
  • Publication number: 20160187547
    Abstract: The present invention is to provide a color material dispersion liquid which is able to form a high-luminance coating film having excellent heat resistance, with adjusting the color tone of the coating film to a desired color tone. Disclosed is a color material dispersion liquid containing: (A) a color material, (B) a dispersant and (C) a solvent, wherein the color material (A) contains a color material (A-1) in which at least a cation represented by the following general formula (I) and a monovalent anion represented by the following general formula (II) form a salt: (symbols in the general formulae (I) and (II) are as described in the Description.
    Type: Application
    Filed: March 28, 2014
    Publication date: June 30, 2016
    Inventors: Tomoki MURATA, Michihiro OGURA, Masato OKADA, Daisuke ENDO, Fumiyasu MURAKAMI, Hiroaki SEGAWA
  • Patent number: 9376571
    Abstract: The present invention is to provide a colorant dispersion liquid which is able to form a high-luminance coating film having better heat resistance compared to the case of using conventional dyes. Disclosed is a colorant dispersion liquid containing (A) a colorant, (B) a dispersant, and (C) a solvent, wherein the colorant (A) contains a color material represented by the following general formula (I) and a xanthene-based dye; a solubility of the color material in the solvent (C) and that of the xanthene-based dye in the solvent (C) are each 0.2 (g/100 g solvent) or less at 23° C.; and the color material and the xanthene-based dye are dispersed in the solvent (C) by the dispersant (B): (The symbols in the formula are as described in the Description.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: June 28, 2016
    Assignees: DAI NIPPON PRINTING CO., LTD., DNP FINE CHEMICALS CO., LTD.
    Inventors: Masato Okada, Daisuke Endo, Michihiro Ogura, Hiroaki Segawa, Tomoki Murata, Yoshihito Maeno, Hiroshi Oshima
  • Patent number: 9354367
    Abstract: An object of the present invention is to provide a color material dispersion liquid which is able to form a coating film with high luminance, excellent heat resistance and excellent light resistance. Disclosed is a color material dispersion liquid including a color material represented by the following general formula (I), a dispersant, and a specific solvent, wherein molybdenum and tungsten are contained in a polyoxometalate anion in the color material, and a molar ratio between the molybdenum and the tungsten is 0.4:99.6 to 15:85: (Symbols shown in the general formula (I) are described in the Description.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: May 31, 2016
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Masato Okada, Daisuke Endo, Michihiro Ogura, Tomoki Murata, Hiroaki Segawa