Patents by Inventor Jun Tsujimoto

Jun Tsujimoto 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: 12248121
    Abstract: An optical film having high anti-glare properties and favorable fingerprints wiping off properties is provided. The optical film has a first surface, and a second surface which is a surface opposite to the first surface, wherein the optical film comprises an anti-reflection layer and an anti-glare layer in this order from the first surface to the second surface, the first surface has a profile of depressions and projections, the first surface has an arithmetic mean height Sa of 0.05 ?m or more specified in ISO 25178-2:2012, and the first surface satisfies the relation represented by the following Expression 1: Sw×Vmp?2.00 (Expression 1) wherein “Sw” represents a tilt angle (degrees) of 30 ?l pure water droplet flowing down on the first surface; and “Vmp” represents a value of a peak material volume (ml/m2) of the first surface specified in ISO 25178-2:2012.
    Type: Grant
    Filed: September 25, 2023
    Date of Patent: March 11, 2025
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Jun Tsujimoto, Yukimitsu Iwata, Michiaki Takei, Masafumi Tanaka, Keisuke Ikeda, Gen Furui
  • Publication number: 20250044635
    Abstract: Provided is an optical film which has high anti-glare properties, enables a suppress of a reduction in jet-black appearance by reflected scattered light, and has favorable scratch resistance. An optical film having a surface with depressions and projections, wherein the surface with depressions and projections has a peak material volume Vmp of 0.010 ml/m2 or more and 0.050 ml/m2 or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sal of 4.0 ?m or more and 12.0 ?m or less specified in ISO 25178-2:2012.
    Type: Application
    Filed: April 25, 2023
    Publication date: February 6, 2025
    Inventors: Jun TSUJIMOTO, Gen FURUI, Yukimitsu IWATA, Shigeki MURAKAMI, Takumi YONEYAMA, Mitsuhiro KUZUHARA
  • Publication number: 20240427058
    Abstract: Provided is an optical film which has high anti-glare properties and high scratch resistance and enables a suppression in reflected scattered light. An optical film having a surface with depressions and projections, wherein the surface with depressions and projections has a developed interfacial area ratio Sdr of 0.010 or more and 0.060 or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sa1 of 4.0 ?m or more and 12.0 ?m or less specified in ISO 25178-2:2012.
    Type: Application
    Filed: April 25, 2023
    Publication date: December 26, 2024
    Inventors: Jun TSUJIMOTO, Gen FURUI, Shigeki MURAKAMI, Yukimitsu IWATA, Takumi YONEYAMA, Mitsuhiro KUZUHARA
  • Publication number: 20240418911
    Abstract: Provided is an optical film which has high anti-glare properties, enables a suppress of a reduction in jet-black appearance by reflected scattered light, and has favorable scratch resistance. An optical film having a surface with depressions and projections, wherein the surface with depressions and projections has a reduced peak height Spk of 0.20 ?m or more and 1.00 ?m or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sal of 4.0 ?m or more and 12.0 ?m or less specified in ISO 25178.
    Type: Application
    Filed: April 25, 2023
    Publication date: December 19, 2024
    Inventors: Jun TSUJIMOTO, Gen FURUI, Yukimitsu IWATA, Shigeki MURAKAMI, Takumi YONEYAMA, Mitsuhiro KUZUHARA
  • Publication number: 20240411055
    Abstract: Provided is an anti-glare film excellent in anti-glare properties and scratch resistance and capable of suppressing reflected scattered light. An anti-glare film including an anti-glare layer, the anti-glare film having an uneven surface, wherein for an amplitude spectrum of elevation of the uneven surface, when a sum of amplitudes corresponding to spatial frequencies of 0.005 ?m?1, 0.010 ?m?1, and 0.015 ?m?1 is defined as AM1 and an amplitude at a spatial frequency of 0.300 ?m?1 is defined as AM2, AM1 is more than 0.4000 ?m and 1.0000 ?m or less, and AM2 is 0.0050 ?m or more and 0.0500 ?m or less.
    Type: Application
    Filed: October 27, 2022
    Publication date: December 12, 2024
    Inventors: Mitsuhiro KUZUHARA, Yukimitsu IWATA, Jun TSUJIMOTO, Shigeki MURAKAMI, Gen FURUI
  • Patent number: 12135406
    Abstract: An optical film having high anti-glare properties and favorable fingerprints wiping off properties is provided. The optical film has a first surface, and a second surface which is a surface opposite to the first surface, wherein the optical film comprises an anti-reflection layer and an anti-glare layer in this order from the first surface to the second surface, the first surface has a profile of depressions and projections, the first surface has an arithmetic mean height Sa of 0.05 ?m or more specified in ISO 25178-2:2012, and the first surface satisfies the relation represented by the following Expression 1: Sw×Vmp?2.00 (Expression 1) wherein “Sw” represents a tilt angle (degrees) of 30 ?l pure water droplet flowing down on the first surface; and “Vmp” represents a value of a peak material volume (ml/m2) of the first surface specified in ISO 25178-2:2012.
    Type: Grant
    Filed: March 26, 2024
    Date of Patent: November 5, 2024
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Jun Tsujimoto, Yukimitsu Iwata, Michiaki Takei, Masafumi Tanaka, Keisuke Ikeda, Gen Furui
  • Publication number: 20240272330
    Abstract: An optical film having high anti-glare properties and favorable fingerprints wiping off properties is provided. The optical film has a first surface, and a second surface which is a surface opposite to the first surface, wherein the optical film comprises an anti-reflection layer and an anti-glare layer in this order from the first surface to the second surface, the first surface has a profile of depressions and projections, the first surface has an arithmetic mean height Sa of 0.05 ?m or more specified in ISO 25178-2:2012, and the first surface satisfies the relation represented by the following Expression 1: Sw×Vmp?2.00 (Expression 1) wherein “Sw” represents a tilt angle (degrees) of 30 ?l pure water droplet flowing down on the first surface; and “Vmp” represents a value of a peak material volume (ml/m2) of the first surface specified in ISO 25178-2:2012.
    Type: Application
    Filed: March 26, 2024
    Publication date: August 15, 2024
    Inventors: Jun TSUJIMOTO, Yukimitsu IWATA, Michiaki TAKEI, Masafumi TANAKA, Keisuke IKEDA, Gen FURUI
  • Publication number: 20240272331
    Abstract: An optical film having high anti-glare properties and favorable fingerprints wiping off properties is provided. The optical film has a first surface, and a second surface which is a surface opposite to the first surface, wherein the optical film comprises an anti-reflection layer and an anti-glare layer in this order from the first surface to the second surface, the first surface has a profile of depressions and projections, the first surface has an arithmetic mean height Sa of 0.05 ?m or more specified in ISO 25178-2:2012, and the first surface satisfies the relation represented by the following Expression 1: Sw×Vmp?2.00 (Expression 1) wherein “Sw” represents a tilt angle (degrees) of 30 ?l pure water droplet flowing down on the first surface; and “Vmp” represents a value of a peak material volume (ml/m2) of the first surface specified in ISO 25178-2:2012.
    Type: Application
    Filed: September 25, 2023
    Publication date: August 15, 2024
    Inventors: Jun TSUJIMOTO, Yukimitsu IWATA, Michiaki TAKEI, Masafumi TANAKA, Keisuke IKEDA, Gen FURUI
  • Patent number: 11960162
    Abstract: Provided is an anti-glare film excellent in anti-glare properties and capable of suppressing reflected scattered light. The anti-glare film includes an anti-glare layer, the anti-glare film having an uneven surface, wherein for an amplitude spectrum of elevation of the uneven surface, when a sum of amplitudes corresponding to spatial frequencies of 0.005 ?m?1, 0.010 ?m?1, and 0.015 ?m?1 is defined as AM1 and an amplitude at a spatial frequency of 0.300 ?m?1 is defined as AM2, AM1 is 0.070 ?m or more and 0.400 ?m or less, AM2 is 0.0050 ?m or more, and AM2<AM1.
    Type: Grant
    Filed: July 11, 2023
    Date of Patent: April 16, 2024
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Mitsuhiro Kuzuhara, Yukimitsu Iwata, Jun Tsujimoto, Shigeki Murakami, Gen Furui
  • Publication number: 20240012277
    Abstract: Provided is an anti-glare film excellent in anti-glare properties and capable of suppressing reflected scattered light. An anti-glare film including an anti-glare layer, the anti-glare film having an uneven surface, wherein for amplitude spectrum of elevation of the uneven surface, when a sum of amplitudes corresponding to spatial frequencies of 0.005 ?m?1, 0.010 ?m?1, and 0.015 ?m?1 is defined as AM1 and an amplitude at a spatial frequency of 0.300 ?m?1 is defined as AM2, AM1 is 0.070 ?m or more and 0.400 ?m or less, AM2 is 0.0050 ?m or more, and AM2<AM1.
    Type: Application
    Filed: July 11, 2023
    Publication date: January 11, 2024
    Inventors: Mitsuhiro KUZUHARA, Yukimitsu IWATA, Jun TSUJIMOTO, Shigeki MURAKAMI, Gen FURUI
  • Publication number: 20230229036
    Abstract: Provided is an anti-glare film excellent in anti-glare properties and capable of suppressing reflected scattered light. An anti-glare film including an anti-glare layer, the anti-glare film having an uneven surface, wherein for amplitude spectrum of elevation of the uneven surface, when a sum of amplitudes corresponding to spatial frequencies of 0.005 ?m?1, 0.010 ?m?1, and 0.015 ?m?1 is defined as AM1 and an amplitude at a spatial frequency of 0.300 ?m?1 is defined as AM2, AM1 is 0.070 ?m or more and 0.400 ?m or less, AM2 is 0.0050 ?m or more, and AM2<AM1.
    Type: Application
    Filed: May 14, 2021
    Publication date: July 20, 2023
    Inventors: Mitsuhiro KUZUHARA, Yukimitsu IWATA, Jun TSUJIMOTO, Shigeki MURAKAMI, Gen FURUI
  • Patent number: 11175768
    Abstract: Provided is a method for selecting a touch panel pen writing member that enhances the efficiency for product design and quality management of writing members. A method for selecting a touch panel pen writing member, in which a writing member satisfying the following requirement A1-1 is selected as the touch panel pen writing member: <Requirement A1-1> A touch panel pen is secured in a state of being in contact with the surface of the touch panel pen writing member at an angle of 60 degrees, then while a vertical load of 100 gf is kept applied to the touch panel pen and while the touch panel pen writing member is moved 40 mm in one direction at a speed of 14 mm/second, the kinetic friction force in the movement direction given to the touch panel pen is measured at intervals of 0.001 seconds, and an average of the kinetic friction forces obtained every 0.001 second is calculated.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: November 16, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Shubou Taya, Tomohiro Ogawa, Yosuke Takayama, Jun Tsujimoto, Gen Furui
  • Publication number: 20210173512
    Abstract: Provided is a method for selecting a touch panel pen writing member that enhances the efficiency for product design and quality management of writing members. A method for selecting a touch panel pen writing member, in which a writing member satisfying the following requirement A1-1 is selected as the touch panel pen writing member: <Requirement A1-1> A touch panel pen is secured in a state of being in contact with the surface of the touch panel pen writing member at an angle of 60 degrees, then while a vertical load of 100 gf is kept applied to the touch panel pen and while the touch panel pen writing member is moved 40 mm in one direction at a speed of 14 mm/second, the kinetic friction force in the movement direction given to the touch panel pen is measured at intervals of 0.001 seconds, and an average of the kinetic friction forces obtained every 0.001 second is calculated.
    Type: Application
    Filed: February 5, 2018
    Publication date: June 10, 2021
    Inventors: Shubou TAYA, Tomohiro OGAWA, Yosuke TAKAYAMA, Jun TSUJIMOTO, Gen FURUI
  • Patent number: 10795496
    Abstract: It is intended to provide a method for selecting a writing sheet for a touch panel pen that can accurately select a writing sheet with which the generation of unpleasant sounds during writing is suppressed. According to the method for selecting a writing sheet for a touch panel pen, a sheet satisfying condition 1-1 and condition 1-2 described below is selected as a writing sheet for a touch panel pen. <condition 1-1> Sound generated when writing is performed under predetermined conditions using a touch panel pen on the surface of a writing sheet for a touch panel pen is recorded. The sound pressure (dB/Hz) is calculated for each 1 Hz from the recorded sound by means of fast Fourier transform. The values of the dB/Hz at frequencies from 1 Hz to 20,000 Hz are normalized to have a maximum value of 100 and a minimum value of 0, and the normalized values of dB/Hz are adopted as rated sound pressures P.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: October 6, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Shubou Taya, Yosuke Takayama, Tomohiro Ogawa, Jun Tsujimoto
  • Publication number: 20190273238
    Abstract: In a laminated roll, a battery separator and a film are laminated and wound. The battery separator includes a porous layer containing a fluororesin on at least one surface of a polyolefin microporous membrane. The film includes an inorganic particle and a thermoplastic resin. An amount of linear oligomers derived from the thermoplastic resin on a surface of the film is 30 ?g/m2 or less.
    Type: Application
    Filed: July 26, 2017
    Publication date: September 5, 2019
    Inventors: Naoki Mizuno, Jun Tsujimoto, Atsushi Kajita
  • Publication number: 20190196651
    Abstract: It is intended to provide a method for selecting a writing sheet for a touch panel pen that can accurately select a writing sheet with which the generation of unpleasant sounds during writing is suppressed. According to the method for selecting a writing sheet for a touch panel pen, a sheet satisfying condition 1-1 and condition 1-2 described below is selected as a writing sheet for a touch panel pen. <condition 1-1> Sound generated when writing is performed under predetermined conditions using a touch panel pen on the surface of a writing sheet for a touch panel pen is recorded. The sound pressure (dB/Hz) is calculated for each 1 Hz from the recorded sound by means of fast Fourier transform. The values of the dB/Hz at frequencies from 1 Hz to 20,000 Hz are normalized to have a maximum value of 100 and a minimum value of 0, and the normalized values of dB/Hz are adopted as rated sound pressures P.
    Type: Application
    Filed: May 31, 2017
    Publication date: June 27, 2019
    Inventors: Shubou TAYA, Yosuke TAKAYAMA, Tomohiro OGAWA, Jun TSUJIMOTO
  • Patent number: 10254444
    Abstract: The claimed invention provides an anti-glare film which has high pencil hardness and high scratch resistance along with crack prevention, and also has high image contrast and excellent anti-glare property. Provided is an anti-glare film including a light transmitting substrate, and an anti-glare layer having surface roughness on at least one surface of the light transmitting substrate. The anti-glare layer includes chain-like inorganic fine particles which have an area ratio of 30 to 94% in the thickness direction cross section of the anti-glare layer.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: April 9, 2019
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Jun Tsujimoto, Aya Naitou, Yukihiro Doumori, Takashi Narikawa, Takashi Kodama
  • Patent number: 9535194
    Abstract: An optical sheet used as a component for a touch panel or a display element of a display device is capable of imparting a variety of characteristics such as anti-glare properties and preventing the scintillation of image light in ultrahigh-definition display elements having a pixel density of 300 ppi or more. The optical sheet has an uneven shape on a surface, and the uneven shape satisfies at least one of three disclosed conditions relating to the inclination angles of the uneven portions of the sheet and the distribution curves of the inclination angles.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 3, 2017
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Gen Furui, Jun Tsujimoto, Aya Naitou
  • Publication number: 20150260882
    Abstract: A touch panel capable of imparting a variety of characteristics such as anti-glare properties and preventing the scintillation of image light in ultrahigh-definition display elements having a pixel density of 300 ppi or more is provided.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 17, 2015
    Inventors: Gen FURUI, Jun TSUJIMOTO, Aya NAITOU
  • Publication number: 20140177052
    Abstract: The claimed invention provides an anti-glare film which has high pencil hardness and high scratch resistance along with crack prevention, and also has high image contrast and excellent anti-glare property. Provided is an anti-glare film including a light transmitting substrate, and an anti-glare layer having surface roughness on at least one surface of the light transmitting substrate. The anti-glare layer includes chain-like inorganic fine particles which have an area ratio of 30 to 94% in the thickness direction cross section of the anti-glare layer.
    Type: Application
    Filed: July 25, 2012
    Publication date: June 26, 2014
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Jun Tsujimoto, Aya Naitou, Yukihiro Doumori, Takashi Narikawa, Takashi Kodama