Patents by Inventor Masayuki Tsunekawa

Masayuki Tsunekawa 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: 20240027357
    Abstract: A sparkle contrast correcting method includes a step of acquiring a first sparkle contrast that is caused by an anti-glare layer that is disposed on a surface of an electronic display and information that represents a first measurement condition, the first sparkle contrast being used as a comparison standard and being measured in the first measurement condition by using a first imaging lens that images emitted light from the anti-glare layer and a first two-dimensional image sensor on which the emitted light is imaged, a step of acquiring a second sparkle contrast that is caused by the anti-glare layer and information that represents a second measurement condition, the second sparkle contrast being used as a comparison target and being measured in the second measurement condition that differs from the first measurement condition by using a second imaging lens that images emitted light from the anti-glare layer and a second two-dimensional image sensor on which the emitted light is imaged, and a step of correc
    Type: Application
    Filed: November 24, 2020
    Publication date: January 25, 2024
    Inventors: Makio KURASHIGE, Gen FURUI, Kazutoshi ISHIDA, Hiroko SUZUKI, Masayuki TSUNEKAWA, Yukimitsu IWATA, Norinaga NAKAMURA, Shumpei NISHIO
  • Patent number: 11169303
    Abstract: Provided is an optical layered body which is extremely high in the stability of the antistatic performance, and has a stable surface resistance even after a durability test. The optical layered body includes an antistatic layer on one face of a light-transmitting substrate, wherein the antistatic layer is formed using a composition for an antistatic layer containing conductive fine particles, a resin component, and a solvent, and the resin component has no reactive functional groups in a molecule, and is soluble in the solvent and compatible with the conductive fine particles.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: November 9, 2021
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoyuki Horio, Masayuki Tsunekawa, Seiichi Isojima, Kana Yamamoto
  • Patent number: 10908711
    Abstract: It is intended to provide a writing sheet for a touch panel pen which can offer favorable writing feeling. The present invention provides a writing sheet for a touch panel pen (A) given below, the writing sheet having a surface whose maximum peak height Rp of a roughness curve and maximum valley depth Rv of the roughness curve defined in JIS B0601: 2001 satisfy the following conditions (A1) and (A2), and whose average wavelength ?a calculated according to the following expression (i) from average tilt angle ?a and arithmetic average roughness Ra defined in JIS B0601: 2001 satisfies the following condition (A3): 2.0 ?m?Rp?8.0 ?m (A1), 0.8 ?m?Rv?6.0 ?m (A2), 45 ?m??a?300 ?m (A3), and ?a=2?×(Ra/tan(?a)) (i), <touch panel pen (A)> the touch panel pen having an angled part in at least a portion of a tip region, wherein a volumetric change of the tip region upon application of a vertical load of 100 gf is 1.0% or less.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: February 2, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Shubou Taya, Ryohei Miyata, Kentaro Hata, Masayuki Tsunekawa
  • Patent number: 10732733
    Abstract: It is intended to provide a writing sheet for a touch panel pen which can offer favorable writing feeling. The present invention provides a writing sheet for a touch panel pen (A) given below, the writing sheet having a surface whose maximum peak height Rp of a roughness curve and maximum valley depth Rv of the roughness curve defined in JIS B0601: 2001 satisfy the following conditions (A1) and (A2), and whose average wavelength ?a calculated according to the following expression (i) from average tilt angle ?a and arithmetic average roughness Ra defined in JIS B0601: 2001 satisfies the following condition (A3): 2.0 ?m?Rp?8.0 ?m (A1), 0.8 ?m?Rv?6.0 ?m (A2), 45 ?m??a?300 ?m (A3), and ?a=2?×(Ra/tan(?a)) (i), <touch panel pen (A)> the touch panel pen having an angled part in at least a portion of a tip region, wherein a volumetric change of the tip region upon application of a vertical load of 100 gf is 1.0% or less.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: August 4, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Shubou Taya, Ryohei Miyata, Kentaro Hata, Masayuki Tsunekawa
  • Publication number: 20200183509
    Abstract: It is intended to provide a writing sheet for a touch panel pen which can offer favorable writing feeling. The present invention provides a writing sheet for a touch panel pen (A) given below, the writing sheet having a surface whose maximum peak height Rp of a roughness curve and maximum valley depth Rv of the roughness curve defined in JIS B0601: 2001 satisfy the following conditions (A1) and (A2), and whose average wavelength ?a calculated according to the following expression (i) from average tilt angle ?a and arithmetic average roughness Ra defined in JIS B0601: 2001 satisfies the following condition (A3): 2.0 ?m?Rp?8.0 ?m (A1), 0.8 ?m?Rv?6.0 ?m (A2), 45 ?m??a?300 ?m (A3), and ?a=2?×(Ra/tan(?a)) (i), <touch panel pen (A)> the touch panel pen having an angled part in at least a portion of a tip region, wherein a volumetric change of the tip region upon application of a vertical load of 100 gf is 1.0% or less.
    Type: Application
    Filed: February 12, 2020
    Publication date: June 11, 2020
    Inventors: Shubou TAYA, Ryohei MIYATA, Kentaro HATA, Masayuki TSUNEKAWA
  • Publication number: 20190113791
    Abstract: Provided are [1] an optical laminate comprising a substrate film, a transparent conductive layer and a surface protection layer in this order, wherein an average value of a surface resistivity measured according to JIS K6911 is in the range of 1.0×107 ?/? or more and 1.0×1010 ?/? or less, and a standard deviation ? of the surface resistivity is 5.0×108 ?/? or less, [2] an optical laminate comprising a substrate film, a transparent conductive layer and a surface protection layer in this order, wherein the substrate film is a cycloolefin polymer film, a ratio of a thickness of the substrate film to a thickness of the entire optical laminate is 80% or more and 95% or less, and a rate of elongation of the optical laminate at a temperature of 150° C., as measured using a dynamic viscoelasticity measuring apparatus under conditions of a frequency of 10 Hz, a tensile load of 50 N and a rate of temperature increase of 2° C./min, is 5.
    Type: Application
    Filed: February 9, 2017
    Publication date: April 18, 2019
    Inventors: Kana YAMAMOTO, Masayuki TSUNEKAWA, Toshiki IWASAKI, Takahisa NOMURA, Hiroki NAKAGAWA, Takanori HAMADA, Eiji OOISHI, Kuniaki YOSHIKATA, Masataka NAKASHIMA
  • Publication number: 20180364822
    Abstract: It is intended to provide a writing sheet for a touch panel pen which can offer favorable writing feeling. The present invention provides a writing sheet for a touch panel pen (A) given below, the writing sheet having a surface whose maximum peak height Rp of a roughness curve and maximum valley depth Rv of the roughness curve defined in JIS B0601: 2001 satisfy the following conditions (A1) and (A2), and whose average wavelength ?a calculated according to the following expression (i) from average tilt angle ?a and arithmetic average roughness Ra defined in JIS B0601: 2001 satisfies the following condition (A3): 2.0 ?m?Rp?8.0 ?m (A1), 0.8 ?m?Rv?6.0 ?m (A2), 45 ?m??a?300 ?m (A3), and ?a=2?×(Ra/tan(?a)) (i), <touch panel pen (A)> the touch panel pen having an angled part in at least a portion of a tip region, wherein a volumetric change of the tip region upon application of a vertical load of 100 gf is 1.0% or less.
    Type: Application
    Filed: December 5, 2016
    Publication date: December 20, 2018
    Inventors: Shubou TAYA, Ryohei MIYATA, Kentaro HATA, Masayuki TSUNEKAWA
  • Patent number: 9880419
    Abstract: Provided is an optical laminate for a front surface of an in-cell touch panel liquid crystal element in which the thickness can be reduced while necessary functions are ensured, and a liquid crystal screen becoming cloudy can be prevented. The optical laminate for a front surface of an in-cell touch panel liquid crystal element comprises a phase difference plate, a polarizing film, and a surface protective film in this order, and further comprises a conductive layer. The surface protective film has optical anisotropy that scatters linear polarized light emitted from the polarizing film, and a thickness of the optical laminate is in a range of 90 ?m to 450 ?m.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: January 30, 2018
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventor: Masayuki Tsunekawa
  • Patent number: 9720281
    Abstract: An optical laminate for a front surface of an in-cell touch panel liquid crystal element has reduced thickness while avoiding cloudiness of the liquid crystal screen. The optical laminate for a front surface of an in-cell touch panel liquid crystal element comprises a phase difference plate, a polarizing film, and a transparent substrate in this order, and further comprises a conductive layer. The transparent substrate has optical anisotropy that scatters linear polarized light emitted from the polarizing film, the phase difference plate, the polarizing film, and the transparent substrate are laminated without other layers or only through the conductive layer, and a thickness of the optical laminate is in a range of 32 ?m to 300 ?m.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: August 1, 2017
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventor: Masayuki Tsunekawa
  • Publication number: 20150301385
    Abstract: Provided is an optical laminate for a front surface of an in-cell touch panel liquid crystal element in which the thickness can be reduced while necessary functions are ensured, and a liquid crystal screen becoming cloudy can be prevented. The optical laminate for a front surface of an in-cell touch panel liquid crystal element comprises a phase difference plate, a polarizing film, and a surface protective film in this order, and further comprises a conductive layer. The surface protective film has optical anisotropy that scatters linear polarized light emitted from the polarizing film, and a thickness of the optical laminate is in a range of 90 ?m to 450 ?m.
    Type: Application
    Filed: October 25, 2013
    Publication date: October 22, 2015
    Inventor: Masayuki Tsunekawa
  • Publication number: 20150293390
    Abstract: Provided is an optical laminate for a front surface of an in-cell touch panel liquid crystal element in which the thickness can be reduced while necessary functions are ensured, and a liquid crystal screen becoming cloudy can be prevented. The optical laminate for a front surface of an in-cell touch panel liquid crystal element comprises a phase difference plate, a polarizing film, and a transparent substrate in this order, and further comprises a conductive layer. The transparent substrate has optical anisotropy that scatters linear polarized light emitted from the polarizing film, the phase difference plate, the polarizing film, and the transparent substrate are laminated without other layers or only through the conductive layer, and a thickness of the optical laminate is in a range of 32 ?m to 300 ?m.
    Type: Application
    Filed: October 25, 2013
    Publication date: October 15, 2015
    Inventor: Masayuki Tsunekawa
  • Patent number: 9097844
    Abstract: Provided is an optical layered body having excellent blocking resistance. The optical layered body includes a triacetyl cellulose substrate and a hard coat layer, the hard coat layer having fine surface roughness that has an average PV roughness Rtm of 2.2 to 11.5 nm, a base roughness depth R3z of 2.5 to 13.5 nm, and a ten-point average roughness Rz of 2.6 to 13.5 nm, and satisfy the relation Rtm<R3z?Rz.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: August 4, 2015
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Masayuki Tsunekawa, Kana Yamamoto, Toshiki Iwasaki
  • Patent number: 8993114
    Abstract: Provided is a hard coat film having high hardness and excellent restorability in view of the above circumstances. A hard coat film comprising: a light-transmitting substrate; and a hard coat layer, the hard coat layer comprising a cured product of a composition for a hard coat layer, the composition including an isocyanuric skeleton-containing urethane(meth)acrylate.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: March 31, 2015
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kana Yamamoto, Toshiki Iwasaki, Masayuki Tsunekawa
  • Publication number: 20150004397
    Abstract: Provided is an optical layered body which is extremely high in the stability of the antistatic performance, and has a stable surface resistance even after a durability test. The optical layered body includes an antistatic layer on one face of a light-transmitting substrate, wherein the antistatic layer is formed using a composition for an antistatic layer containing conductive fine particles, a resin component, and a solvent, and the resin component has no reactive functional groups in a molecule, and is soluble in the solvent and compatible with the conductive fine particles.
    Type: Application
    Filed: December 14, 2012
    Publication date: January 1, 2015
    Inventors: Tomoyuki Horio, Masayuki Tsunekawa, Seiichi Isojima, Kana Yamamoto
  • Publication number: 20130295390
    Abstract: Provided is a hard coat film having high hardness and excellent restorability in view of the above circumstances. A hard coat film comprising: a light-transmitting substrate; and a hard coat layer, the hard coat layer comprising a cured product of a composition for a hard coat layer, the composition including an isocyanuric skeleton-containing urethane(meth)acrylate.
    Type: Application
    Filed: December 16, 2011
    Publication date: November 7, 2013
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kana Yamamoto, Toshiki Iwasaki, Masayuki Tsunekawa
  • Publication number: 20130222906
    Abstract: Provided is an optical layered body having excellent blocking resistance. The optical layered body includes a triacetyl cellulose substrate and a hard coat layer, the hard coat layer having fine surface roughness that has an average PV roughness Rtm of 2.2 to 11.5 nm, a base roughness depth R3z of 2.5 to 13.5 nm, and a ten-point average roughness Rz of 2.6 to 13.5 nm, and satisfy the relation Rtm<R3z?Rz.
    Type: Application
    Filed: August 23, 2011
    Publication date: August 29, 2013
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Masayuki Tsunekawa, Kana Yamamoto, Toshiki Iwasaki
  • Patent number: 7854773
    Abstract: There is disclosed an electrode plate for a nonaqueous electrolyte secondary battery, which comprises a collector and an active material layer provided on at least one side of the collector, in which the active material layer has one or more slits. Such an electrode plate can facilitate infiltration of a liquid electrolyte even when wound at high density and can have high stability of quality. There is also disclosed a nonaqueous electrolyte secondary battery with high capacity and high quality, which is constructed using the above-mentioned electrode plate.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: December 21, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Masayuki Tsunekawa, Tadafumi Shindo
  • Patent number: 7449031
    Abstract: An electric double layer capacitor electrode which has a low collector resistance and a high capacitance even when it is provided with an electrode active material layer containing more activated carbon is disclosed. A method for producing such an electric double layer capacitor electrode and an electric double layer capacitor are also disclosed. The electric double layer capacitor is characterized by sealing a polarized electrode, wherein a pattern of electrode active material layer is formed on at least one surface of a collector through intermittent application by a die-coating method or a comma reverse method and the pattern is composed of electrode active material layers arranged at intervals at least in the longitudinal direction of the collector, at least a pair of polarized electrodes, a separator and an electrolytic solution in a container.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: November 11, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Masayuki Tsunekawa, Tadafumi Shindo
  • Publication number: 20080113265
    Abstract: There is disclosed an electrode plate for a nonaqueous electrolyte secondary battery, which comprises a collector and an active material layer provided on at least one side of the collector, in which the active material layer has one or more slits. Such an electrode plate can facilitate infiltration of a liquid electrolyte even when wound at high density and can have high stability of quality. There is also disclosed a nonaqueous electrolyte secondary battery with high capacity and high quality, which is constructed using the above-mentioned electrode plate.
    Type: Application
    Filed: December 18, 2007
    Publication date: May 15, 2008
    Inventors: Masayuki Tsunekawa, Tadafumi Shindo
  • Publication number: 20060126263
    Abstract: An electric double layer capacitor electrode which has a low collector resistance and a high capacitance even when it is provided with an electrode active material layer containing moreactivated carbonis disclosed. A method for producing such an electric double layer capacitor electrode and an electric double layer capacitor are also disclosed. The electric double layer capacitor is characterized by sealing a polarized electrode, wherein a pattern of electrode active material layer is formed on at least one surface of a collector through intermittent application by a die-coating method or a comma reverse method and the pattern is composed of electrode active material layers arranged at intervals at least in the longitudinal direction of the collector, at least a pair of polarized electrodes, a separator and an electrolytic solution in a container.
    Type: Application
    Filed: December 16, 2003
    Publication date: June 15, 2006
    Inventors: Masayuki Tsunekawa, Tadafumi Shindo