Patents by Inventor Eiko SUEFUSA

Eiko SUEFUSA 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: 11169312
    Abstract: A pressure-sensitive-adhesive-layer-attached polarizing film is disclosed having an odd shape, and capable of reducing occurrence of a crack in a polarizer and preventing peeling and foaming of a pressure-sensitive adhesive layer and warpage of a polarizing film. This pressure-sensitive-adhesive-layer-attached polarizing film comprises a polarizing film, and a pressure-sensitive adhesive layer on one surface of the polarizing film. The pressure-sensitive-adhesive-layer-attached polarizing film has an odd shape other than a rectangular shape, and when a strain gauge is attached to a surface not having the pressure-sensitive adhesive layer of the polarizing film such that a measurement axis and an absorption axis of the polarizing film intersect at right angles and strain amounts are measured, a difference between a strain amount at ?40° C. and a strain amount at 85° C. is 3000?? or less, and the creep value of the pressure-sensitive adhesive layer at 85° C. is 15-600 ?m inclusive.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: November 9, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Yusuke Toyama, Eiko Suefusa
  • Patent number: 11079624
    Abstract: There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a cover sheet arranged on a viewer side of the liquid crystal cell, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; and a second polarizer arranged on a viewer side of the cover sheet to cover the transmission portion, wherein an absorption axis direction of the first polarizer and an absorption axis direction of the second polarizer are substantially perpendicular to each other.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: August 3, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Seiji Umemoto
  • Patent number: 11048114
    Abstract: There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a cover sheet arranged on a viewer side of the liquid crystal cell, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; and a second polarizer arranged on a viewer side of the cover sheet to cover the transmission portion, wherein an absorption axis direction of the first polarizer and an absorption axis direction of the second polarizer are substantially perpendicular to each other.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: June 29, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Seiji Umemoto
  • Patent number: 11022735
    Abstract: There is provided a polarizing plate excellent in durability. A method of producing a polarizing plate according to an embodiment of the present invention includes: preparing a polarizing film laminate including a polarizer and a protective film arranged on at least one side of the polarizer; and shrinking the polarizing film laminate.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: June 1, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Hiroki Kuramoto, Youichirou Sugino
  • Publication number: 20210048570
    Abstract: The reinforced polarizing optical film laminate comprises a polarizing film laminate containing an iodine concentration for the polarizing film and a water content for the polarizing film laminate which fall within a region surrounded, in an x-y orthogonal coordinate system in which the iodine concentration of the polarizing film is plotted on the x-axis, and the water content of the polarizing film laminate is plotted on the y-axis, by: a first line segment connecting a first point and a second point; a second line segment connecting the second point and a third point; a third line segment connecting the third point and a fourth point; a fourth line segment connecting the fourth point and a fifth point; and a fifth line segment connecting the first point and the fifth point, wherein the reinforced film laminate has a breaking strength in a MD direction of 135 N/10 mm or more.
    Type: Application
    Filed: February 28, 2019
    Publication date: February 18, 2021
    Inventors: Tetsuro TAKEDA, Katsunori TAKADA, Keisuke KIMURA, Tomohiro YAMASHITA, Yoichiro SUGINO, Eiko SUEFUSA, Akinori IZAKI
  • Publication number: 20210048567
    Abstract: A pressure-sensitive-adhesive-layer-attached polarizing film is disclosed having an odd shape, and capable of reducing occurrence of a crack in a polarizer and preventing peeling and foaming of a pressure-sensitive adhesive layer and warpage of a polarizing film. This pressure-sensitive-adhesive-layer-attached polarizing film comprises a polarizing film, and a pressure-sensitive adhesive layer on one surface of the polarizing film. The pressure-sensitive-adhesive-layer-attached polarizing film has an odd shape other than a rectangular shape, and when a strain gauge is attached to a surface not having the pressure-sensitive adhesive layer of the polarizing film such that a measurement axis and an absorption axis of the polarizing film intersect at right angles and strain amounts are measured, a difference between a strain amount at ?40° C. and a strain amount at 85° C. is 3000 ?? or less, and the creep value of the pressure-sensitive adhesive layer at 85° C. is 15-600 ?m inclusive.
    Type: Application
    Filed: March 25, 2019
    Publication date: February 18, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Yusuke Toyama, Eiko Suefusa
  • Patent number: 10914868
    Abstract: A primary object of the present invention is to provide a polarizing plate excellent in durability. A polarizing plate (100) according to an embodiment of the present invention includes: a polarizer (10); and a protective film (21 and 22) arranged on at least one side of the polarizer (10). The polarizing plate (100) has a dimensional change ratio of ?0.2% or more in a transmission axis direction thereof when the polarizing plate (100) cut into a size measuring 100 mm by 100 mm is bonded to a glass plate with a pressure-sensitive adhesive and the following operation is repeated 100 times: the polarizing plate (100) bonded to the glass plate is left to stand under an atmosphere at ?40° C. for 30 minutes and then left to stand under an atmosphere at 85° C. for 30 minutes.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: February 9, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Naotaka Higuchi, Kota Nakai, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura
  • Publication number: 20200124773
    Abstract: A primary object of the present invention is to provide a polarizing plate excellent in durability. A polarizing plate (100) according to an embodiment of the present invention includes: a polarizer (10); and a protective film (21 and 22) arranged on at least one side of the polarizer (10). The polarizing plate (100) has a dimensional change ratio of ?0.2% or more in a transmission axis direction thereof when the polarizing plate (100) cut into a size measuring 100 mm by 100 mm is bonded to a glass plate with a pressure-sensitive adhesive and the following operation is repeated 100 times: the polarizing plate (100) bonded to the glass plate is left to stand under an atmosphere at ?40° C. for 30 minutes and then left to stand under an atmosphere at 85° C. for 30 minutes.
    Type: Application
    Filed: November 7, 2019
    Publication date: April 23, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Naotaka Higuchi, Kota Nakai, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura
  • Publication number: 20200073035
    Abstract: There is provided a polarizing plate excellent in durability. A method of producing a polarizing plate according to an embodiment of the present invention includes: preparing a polarizing film laminate including a polarizer and a protective film arranged on at least one side of the polarizer; and shrinking the polarizing film laminate.
    Type: Application
    Filed: November 7, 2019
    Publication date: March 5, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Hiroki Kuramoto, Youichirou Sugino
  • Patent number: 10578786
    Abstract: There is provided a polarizer excellent in heat resistance. A polarizer according to an embodiment of the present invention includes a resin film containing iodine, wherein an end portion of the resin film has formed therein a high-concentration portion having a concentration of a substance that forms a counter ion of iodine higher than that of another portion.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: March 3, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Daisuke Ogomi, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Hiroki Kuramoto, Youichirou Sugino, Keisuke Kimura
  • Patent number: 10466397
    Abstract: There is provided a polarizing plate excellent in durability. A method of producing a polarizing plate according to an embodiment of the present invention includes: preparing a polarizing film laminate including a polarizer and a protective film arranged on at least one side of the polarizer; and shrinking the polarizing film laminate.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: November 5, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Hiroki Kuramoto, Youichirou Sugino
  • Publication number: 20190310406
    Abstract: There is provided a polarizing plate excellent in durability. A method of producing a polarizing plate according to an embodiment of the present invention includes: preparing a polarizing film laminate including a polarizer and a protective film arranged on at least one side of the polarizer; and shrinking the polarizing film laminate.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 10, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Hiroki Kuramoto, Youichirou Sugino
  • Publication number: 20190243046
    Abstract: There is provided a polarizer excellent in heat resistance. A polarizer according to an embodiment of the present invention includes a resin film containing iodine, wherein an end portion of the resin film has formed therein a high-concentration portion having a concentration of a substance that forms a counter ion of iodine higher than that of another portion.
    Type: Application
    Filed: January 23, 2019
    Publication date: August 8, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Daisuke Ogomi, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Hiroki Kuramoto, Youichirou Sugino, Keisuke Kimura
  • Patent number: 10338431
    Abstract: A liquid crystal display apparatus includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a second polarizer arranged on a viewer side of the liquid crystal cell; a cover sheet arranged on a viewer side of the second polarizer, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; a first optical compensation layer arranged on a viewer side of the cover sheet, the first optical compensation layer having an Re(550) of from 100 nm to 180 nm; and a third polarizer arranged on a viewer side of the first optical compensation layer, wherein an angle formed by a slow axis direction of the first optical compensation layer and an absorption axis direction of the third polarizer is from 35° to 55° or from 125° to 145°.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: July 2, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Seiji Umemoto
  • Patent number: 10338430
    Abstract: There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a second polarizer arranged on a viewer side of the liquid crystal cell; a cover sheet arranged on a viewer side of the second polarizer, the cover sheet having an opening portion at a position corresponding to a display region of the liquid crystal cell; and a third polarizer arranged on a viewer side of the cover sheet to cover the opening portion, wherein the opening portion of the cover sheet is filled with a pressure-sensitive adhesive.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: July 2, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Seiji Umemoto
  • Publication number: 20190113659
    Abstract: A primary object of the present invention is to provide a polarizing plate excellent in durability. A polarizing plate (100) according to an embodiment of the present invention includes: a polarizer (10); and a protective film (21 and 22) arranged on at least one side of the polarizer (10). The polarizing plate (100) has a dimensional change ratio of ?0.2% or more in a transmission axis direction thereof when the polarizing plate (100) cut into a size measuring 100 mm by 100 mm is bonded to a glass plate with a pressure-sensitive adhesive and the following operation is repeated 100 times: the polarizing plate (100) bonded to the glass plate is left to stand under an atmosphere at ?40° C. for 30 minutes and then left to stand under an atmosphere at 85° C. for 30 minutes.
    Type: Application
    Filed: December 11, 2018
    Publication date: April 18, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Naotaka Higuchi, Kota Nakai, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura
  • Patent number: 10241236
    Abstract: A primary object of the present invention is to provide a polarizing plate excellent in durability. A polarizing plate (100) according to an embodiment of the present invention includes: a polarizer (10); and a protective film (21 and 22) arranged on at least one side of the polarizer (10). The polarizing plate (100) has a dimensional change ratio of ?0.2% or more in a transmission axis direction thereof when the polarizing plate (100) cut into a size measuring 100 mm by 100 mm is bonded to a glass plate with a pressure-sensitive adhesive and the following operation is repeated 100 times: the polarizing plate (100) bonded to the glass plate is left to stand under an atmosphere at ?40° C. for 30 minutes and then left to stand under an atmosphere at 85° C. for 30 minutes.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: March 26, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Naotaka Higuchi, Kota Nakai, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura
  • Patent number: 10215901
    Abstract: There is provided a polarizer excellent in heat resistance. A polarizer according to an embodiment of the present invention includes a resin film containing iodine, wherein an end portion of the resin film has formed therein a high-concentration portion having a concentration of a substance that forms a counter ion of iodine higher than that of another portion.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: February 26, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Daisuke Ogomi, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Hiroki Kuramoto, Youichirou Sugino, Keisuke Kimura
  • Patent number: 10139671
    Abstract: There is provided a polarizing plate which is imparted durability. A polarizing plats with a pressure-sensitive adhesive, layer according to an embodiment of the present invention includes: a polarizing plate including a polarizer and a protective film arranged on at least one side of the polarizer; and a pressure-sensitive adhesive layer formed on at least one surface of the polarizing plate, wherein in the surface of the polarizing plate where the pressure-sensitive adhesive layer is formed, a non-contact portion that is out of contact with the pressure-sensitive adhesive layer is formed in an end portion of the polarizing plate.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: November 27, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Kota Nakai, Naotaka Higuchi, Shinobu Nagano, Eiko Suefusa, Yoshitsugu Kitamura, Youichirou Sugino, Keisuke Kimura
  • Publication number: 20180307095
    Abstract: There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a second polarizer arranged on a viewer side of the liquid crystal cell; a cover sheet arranged on a viewer side of the second polarizer, the cover sheet having an opening portion at a position corresponding to a display region of the liquid crystal cell; and a third polarizer arranged on a viewer side of the cover sheet to cover the opening portion, wherein the opening portion of the cover sheet is filled with a pressure-sensitive adhesive.
    Type: Application
    Filed: April 10, 2017
    Publication date: October 25, 2018
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Eiko Suefusa, Yoshitsugu Kitamura, Keisuke Kimura, Seiji Umemoto