Patents by Inventor Yusuke Toyama

Yusuke Toyama 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: 20210284875
    Abstract: A pressure-sensitive adhesive composition for an image display panel, a pressure-sensitive adhesive layer for an image display panel, and an optical film provided with a pressure-sensitive adhesive layer are disclosed which are free of problems regarding durability and defective appearance caused by an antistatic agent (conductive agent), and which have superior antistatic properties so as to be usable for applications such as in an image display panel. An image display panel is also disclosed in which the optical film provided with a pressure-sensitive adhesive layer is attached to the surface of the image display panel in contact with the pressure-sensitive adhesive layer without an interposed conductive layer, and a liquid crystal display device using the image display panel. Further, a liquid crystal display device is disclosed with a touch sensing function using the image display panel that can be used as various input display devices such as mobile devices.
    Type: Application
    Filed: April 30, 2021
    Publication date: September 16, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Satoshi Yamamoto, Yusuke Toyama
  • Publication number: 20210179901
    Abstract: A laminate for a flexible image display device is disclosed including a pressure-sensitive adhesive layer and an optical film including at least a polarizing membrane, wherein an amount of deviation based on the pressure-sensitive adhesive layer in an end part of the laminate when the laminate is bent with a bending radius of 3 mm is set in a specific range, whereby exposure of the pressure-sensitive adhesive layer in the end part of the laminate with bending can be suppressed. The laminate for a flexible image display device includes a pressure-sensitive adhesive layer and an optical film including at least a polarizing membrane, wherein an amount of deviation based on the pressure-sensitive adhesive layer in an end part of the laminate is 100 to 600 ?m when the laminate is bent with a bending radius of 3 mm.
    Type: Application
    Filed: July 26, 2018
    Publication date: June 17, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Yusuke Toyama, Taiki Shimokuri
  • Publication number: 20210157186
    Abstract: An in-cell type liquid crystal panel is disclosed containing: an in-cell type liquid crystal cell provided with a liquid crystal layer including liquid crystal molecules homogeneously aligned in the absence of an electric field, a first transparent substrate and a second transparent substrate sandwiching the liquid crystal layer, and a touch sensing electrode unit related to touch sensor and touch-driven functions disposed between the first transparent substrate and the second transparent substrate; and a pressure-sensitive adhesive layer attached polarizing film disposed, via a first pressure-sensitive adhesive layer and without interposing a conductive layer, to the first transparent substrate side on the viewing side of the in-cell type liquid crystal cell; wherein the pressure-sensitive adhesive layer attached polarizing film contains a first polarizing film, an anchor layer, and a first pressure-sensitive adhesive layer; the anchor layer includes a conductive polymer; and the first pressure-sensitive adh
    Type: Application
    Filed: March 28, 2018
    Publication date: May 27, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Satoshi Yamamoto, Yusuke Toyama
  • Patent number: 11008485
    Abstract: A pressure-sensitive adhesive composition for an image display panel, a pressure-sensitive adhesive layer for an image display panel, and an optical film provided with a pressure-sensitive adhesive layer are disclosed which are free of problems regarding durability and defective appearance caused by an antistatic agent (conductive agent), and which have superior antistatic properties so as to be usable for applications such as in an image display panel. An image display panel is also disclosed in which the optical film provided with a pressure-sensitive adhesive layer is attached to the surface of the image display panel in contact with the pressure-sensitive adhesive layer without an interposed conductive layer, and a liquid crystal display device using the image display panel. Further, a liquid crystal display device is disclosed with a touch sensing function using the image display panel that can be used as various input display devices such as mobile devices.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: May 18, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Satoshi Yamamoto, Yusuke Toyama
  • Publication number: 20210108109
    Abstract: An in-cell type liquid crystal panel is disclosed containing an in-cell type liquid crystal cell, a first polarizing film disposed on a viewing side of the in-cell liquid crystal cell, a second polarizing film disposed opposite to the viewing side, and a first pressure-sensitive adhesive layer disposed between the first polarizing film and the in-cell type liquid crystal cell, wherein: a surface resistance value of the first pressure-sensitive adhesive layer side is 1.0×108 to 1.0×1011?/? at the time of producing a first pressure-sensitive adhesive layer attached polarizing film in a state where the first pressure-sensitive adhesive layer is provided on the first polarizing film and a separator is provided on the first pressure-sensitive adhesive layer, and peeling off the separator immediately after the production, and a moisture permeability of the transparent protective film at 40° C.×92% RH is 900 g/(m2·24 h) or less.
    Type: Application
    Filed: March 28, 2018
    Publication date: April 15, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Satoshi Yamamoto, Yusuke Toyama
  • Publication number: 20210109390
    Abstract: A pressure-sensitive adhesive layer attached polarizing film is provided with a pressure-sensitive adhesive layer and a polarizing film, wherein the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition comprising an inorganic cation-anion salt and a (meth)acrylic polymer containing, as monomer units, an alkyl (meth)acrylate and a polar functional group-containing monomer; and a ratio (b/a) of a variation in a surface resistance value on a side of the pressure-sensitive adhesive layer before and after humidification is 5 or less.
    Type: Application
    Filed: March 28, 2018
    Publication date: April 15, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Yusuke Toyama
  • Publication number: 20210103173
    Abstract: An in-cell type liquid crystal panel is disclosed containing an in-cell type liquid crystal cell provided with a liquid crystal layer including liquid crystal molecules which are homogeneously aligned in the absence of an electric field, a first transparent substrate and a second transparent substrate sandwiching the liquid crystal layer from both sides, and a touch sensing electrode unit related to touch sensor and touch-driven functions disposed between the first transparent substrate and the second transparent substrate, and a pressure-sensitive adhesive layer attached polarizing film that is disposed, via a first adhesive layer and without interposing a conductive layer, to the first transparent substrate side on the viewing side of the in-cell type liquid crystal cell. The pressure-sensitive adhesive layer attached polarizing film contains a surface treatment layer, a first polarizing film, and the first pressure-sensitive adhesive layer in this order.
    Type: Application
    Filed: March 28, 2018
    Publication date: April 8, 2021
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Yusuke Toyama
  • 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
  • Publication number: 20200239743
    Abstract: An optical pressure-sensitive adhesive layer which can suppress the occurrence of foaming, peeling, lifting etc. on an adherend (an optical film) even when exposed to heating and humidification conditions; has excellent durability; can suppress surface unevenness due to light leakage; can suppress increases in adhering strength; and has excellent reworkability. An optical pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition containing a (meth)acrylic polymer that contains 3 to 25% by weight of an aromatic ring-containing monomer as a monomer unit and has a polydispersity (weight average molecular weight (Mw)/number average molecular weight (Mn)) of 3.0 or less, wherein the optical pressure-sensitive adhesive layer has an adhering strength of 11 N/25 mm or less to glass.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Hirotomo Ono, Akiko Sugino, Yusuke Toyama
  • Publication number: 20200157387
    Abstract: A pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition containing, as monomer units, at least a (meth)acrylic polymer (A) that contains an alkyl (meth)acrylate, and a silicon compound (B), wherein: the silicon compound (B) is an organopolysiloxane compound; and when a laminate, in which a pressure-sensitive adhesive layer of a polarizing film provided with a pressure-sensitive adhesive layer having the pressure-sensitive adhesive layer and a polarizing film is laminated to an indium-tin composite oxide layer on a transparent conductive substrate having a transparent substrate and the indium-tin composite oxide layer, has been autoclaved for 15 minutes at 50° C. and 5 atm, and then the pressure-sensitive adhesive layer has been peeled away, the ratio of elemental silicon relative to the total of elemental carbon, nitrogen, oxygen, silicon, indium, and tin detected by X-ray photoelectron spectroscopy is 0.5-5 atomic % in the surface of the indium-tin composite oxide layer.
    Type: Application
    Filed: August 7, 2018
    Publication date: May 21, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Hirotomo Ono, Yusuke Toyama
  • Patent number: 10598828
    Abstract: A method for continuously manufacturing an optical display device comprises feeding a continuous web of optical film laminate including a continuous web of releasable film that includes a conductive layer and an optical film sheet that includes a conductive layer formed on the releasable film, bending the releasable film at a peeling body located in close vicinity of a lamination position, collecting the releasable film and thereby peeling the optical film sheet from the optical film laminate, sending the optical film sheet to the lamination position, and laminating the optical film sheet with a panel member which is conveyed to the lamination position by a panel conveying channel which makes at least a double-storied structure with a portion of a collecting channel where the releasable film is collected, attenuating static electrification generated on the optical film sheet, and continuously laminating the optical film sheet with the panel member.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: March 24, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Yu Morimoto, Yusuke Toyama, Takaaki Ishii, Kazuo Kitada, Satoshi Hashimoto, Akihiro Nagura
  • Patent number: 10578778
    Abstract: A continuous web of optical film laminate comprising, an optical film comprising a first substrate and an adhesive layer on the first substrate, a releasable film comprising a second substrate and a releasably treated layer on the second substrate, the releasably treated layer being in contact with the adhesive layer, a first conductive layer between the first substrate and the adhesive layer, and a second conductive layer between the second substrate and the releasably treated layer. The first conductive layer and the second conductive layer comprise a static electrification prevention material, such that the optical film with the first conductive layer, and the releasable film with the second conductive layer, both have a sheet resistance of 1012 ?/sq or less.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: March 3, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Yu Morimoto, Yusuke Toyama, Takaaki Ishii, Kazuo Kitada, Satoshi Hashimoto, Akihiro Nagura
  • Patent number: 10551540
    Abstract: Provided are a separator-attached adhesive layer structure which comprises a separator having moderate light peelability with respect to an adhesive layer and exhibits excellent processability and durability, and a production method therefor. The production method comprises: a first step of forming a layer of an adhesive composition containing a (meth)acryl-based polymer, a peroxide and a phenolic antioxidant, on a release treatment surface of a separator subjected to a release treatment; and a second step of, after completion of the first step, heating the adhesive composition to cause cross-linking therein so as to be formed as an adhesive layer.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: February 4, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takeharu Kitagawa, Yuki Kida, Shinsuke Akizuki, Atsushi Yasui, Yusuke Toyama, Takaaki Ishii
  • Publication number: 20200032113
    Abstract: The purpose of the present invention is to provide an optical pressure-sensitive adhesive layer which is excellent in durability such that foaming, peeling, etc. does not occur under heating/humidification conditions on an adherend and does not cause light leakage even in a narrow frame panel; a pressure-sensitive adhesive layer attached optical film, having the aforementioned optical pressure-sensitive adhesive layer on at least one surface of the optical film; and further a liquid crystal display device using the aforementioned pressure-sensitive adhesive layer attached optical film. 1. An optical pressure-sensitive adhesive layer which is formed from a pressure-sensitive adhesive composition containing a (meth)acrylic polymer, wherein the optical pressure-sensitive adhesive layer has a gel fraction exceeding 90% and a weight average molecular weight (Mw) of 350,000 or more of a sol component.
    Type: Application
    Filed: September 27, 2017
    Publication date: January 30, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Hirotomo Ono, Akiko Sugino, Yusuke Toyama
  • Publication number: 20200033673
    Abstract: The present invention provides a pressure-sensitive adhesive layer attached polarizing film far realizing an in-cell type liquid crystal panel in which it is possible to prevent clouding attributable to the pressure-sensitive adhesive layer even in a humidified environment, and it is also possible to satisfy a stable antistatic function and touch sensor sensitivity. This pressure-sensitive adhesive layer attached polarizing film is provided with a pressure-sensitive adhesive layer and a polarizing film, and is characterized in that: the pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition comprising an organic cation-anion salt and a (meth)acrylic polymer containing, as monomer units, an alkyl (meth)acrylate and a polar functional group-containing monomer; and the ratio (b/a) of the variation in the surface resistances value of the pressure-sensitive adhesive layer-side before and after humidification is 5 or less.
    Type: Application
    Filed: March 28, 2018
    Publication date: January 30, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Yusuke Toyama
  • Publication number: 20200033674
    Abstract: An in-cell type liquid crystal panel is disclosed including an in-cell type liquid crystal cell provided with a liquid crystal layer, a first transparent substrate and a second transparent substrate sandwiching the liquid crystal layer, and a touch sensing electrode unit related to a touch sensor and a touch-driven function between the first transparent substrate and the second transparent substrate and a pressure-sensitive adhesive layer attached polarizing film disposed, via a first adhesive layer and without interposing a conductive layer, to the first transparent substrate side on a viewing side of the in-cell type liquid crystal cell. The pressure-sensitive adhesive layer attached polarizing film comprises a surface treatment layer, a first polarizing film, and a first pressure-sensitive adhesive layer in this order, or comprises the surface treatment layer, the first polarizing film, an anchor layer, and the first pressure-sensitive adhesive layer in this order.
    Type: Application
    Filed: March 28, 2018
    Publication date: January 30, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Satoshi Yamamoto, Yusuke Toyama
  • Publication number: 20200032116
    Abstract: The purpose of the present invention is to provide a pressure-sensitive adhesive composition for a polarizing film from which a pressure-sensitive adhesive layer for a polarizing film can be obtained which can suppress separator peeling strength and can specifically suppress increases in separator peeling strength even when stored for a long period of time after production, and further has excellent durability (heat resistance) even when exposed to high temperature heating conditions and heating/humidifying conditions; and to provide a method for a pressure-sensitive adhesive layer for a polarizing film, the pressure-sensitive adhesive layer attached polarizing film polarizing film which includes the pressure-sensitive adhesive layer, and an image display device that includes the pressure-sensitive adhesive layer attached polarizing film.
    Type: Application
    Filed: September 27, 2017
    Publication date: January 30, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Hirotomo Ono, Akiko Sugino, Yusuke Toyama
  • Publication number: 20200032114
    Abstract: The purpose of the present invention is to provide an optical pressure-sensitive adhesive layer which can suppress the occurrence of foaming, peeling, lifting etc. on an adherend (an optical film) even when exposed to heating and humidification conditions; has excellent durability; can suppress surface unevenness due to light leakage; can suppress increases in adhering strength; and has excellent reworkability. An optical pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition containing a (meth)acrylic polymer that contains 3 to 25% by weight of an aromatic ring-containing monomer as a monomer unit and has a polydispersity (weight average molecular weight (Mw)/number average molecular weight (Mn)) of 3.0 or less, wherein the optical pressure-sensitive adhesive layer has an adhering strength of 11 N/25 mm or less to glass.
    Type: Application
    Filed: September 27, 2017
    Publication date: January 30, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Hirotomo Ono, Akiko Sugino, Yusuke Toyama
  • Publication number: 20200026123
    Abstract: The present invention provides a pressure-sensitive adhesive attached polarizing film for realizing an in-cell type liquid crystal panel which can satisfy a stable antistatic function and touch sensor sensitivity and has excellent heat resistance. This pressure-sensitive adhesive attached polarizing film is provided with a pressure-sensitive adhesive layer and a polarizing film, and is characterized in that: the polarizing film comprises at least a polarizer and a transparent protective film; at least the polarizing film, an anchor layer, and the pressure-sensitive adhesive layer are provided in this order from a viewing side; the anchor layer includes a conductive polymer; the surface resistance value of the anchor layer is 1.0×108 to 1.0×1011?/?; and the moisture permeability of the transparent protective film at 40° C.×92% RK is 10 g/(m2·24 h) or more.
    Type: Application
    Filed: March 28, 2018
    Publication date: January 23, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Yusuke Toyama
  • Publication number: 20200019013
    Abstract: A pressure-sensitive adhesive layer attached polarizing film provided with a pressure-sensitive adhesive layer and a polarizing film is disclosed wherein the pressure-sensitive adhesive layer attached polarizing film is provided with the polarizing film, an anchor layer, and the pressure-sensitive adhesive layer in this order; the, anchor layer includes a conductive polymer; the pressure-sensitive adhesive layer includes an antistatic agent; the anchor layer has a thickness of from 0.01 to 0.5 ?m and a surface resistance value of from 1.0×108 to 1.0×1010 ?/?; the adhesive layer has a thickness of 5 to 100 ?m and a surface resistance of from 1.0×1010 to 1.0×1012 ?/?; and the ratio (b/a) of the variation in the surface resistance value on the side of the pressure-sensitive adhesive layer before and after humidification is 5 or less.
    Type: Application
    Filed: March 28, 2018
    Publication date: January 16, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Yusuke Toyama