Patents by Inventor Seiichi Kusumoto

Seiichi Kusumoto 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: 8124215
    Abstract: A hard-coated antiglare film is provided that has high hardness, high scratch resistance, and good antiglare properties. In the hard-coated antiglare film of the present invention including a transparent plastic film substrate, a hard-coating layer containing fine particles is formed on at least one surface of the transparent plastic film substrate, the hard-coating layer has a thickness in the range of 15 to 30 ?m, the fine particles have a weight average particle size of 30 to 75% of a thickness of the hard-coating layer, the average tilt angle ?a of the unevenness of the hard-coating layer surface is in the range of 0.4° to 1.5°, and the hard-coating layer is formed using a resin for forming the hard-coating layer containing three specific resin components.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: February 28, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
  • Patent number: 7968183
    Abstract: A hard-coating layer is formed on at least one surface of a transparent plastic film substrate using a material for forming a hard-coating layer. The material contains Components A, B, and C. Component A is at least one of urethane acrylate and urethane methacrylate. Component B is at least one of polyol acrylate and polyol methacrylate. Component C is a polymer containing a repeating unit represented by General Formula 1 indicated below.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: June 28, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Katsunori Takada, Hiroyuki Takao, Seiichi Kusumoto, Daisuke Hamamoto, Takayuki Shigematsu
  • Patent number: 7963660
    Abstract: There is provided an antiglare hard-coated film that can maintain antiglare properties and suppress a reduction in the display contrast of a display, when composed of a transparent plastic film substrate and an antiglare hard coat layer formed thereon. The antiglare hard-coated film 4 includes a transparent film substrate 1 and a hard coat layer 2 that is provided on at least one side of the transparent film substrate 1, contains fine particles 2b, and has an irregular surface, wherein the fine particles 2b have an average particle size of 6 ?m to 15 ?m and form irregularities with an average slope angle ?a of 0.4° to 1.5°, and the antiglare hard-coated film satisfies the relation: {(the contrast ratio)/(the contrast ratio of a hard-coated film without the fine particles)}×100?60%.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: June 21, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Daisuke Hamamoto, Hiroyuki Takao, Yuuichi Kimura, Katsunori Takada, Seiichi Kusumoto, Takayuki Shigematsu
  • Patent number: 7604358
    Abstract: A hard-coated antiglare film that has excellent antiglare properties, prevents a glare phenomenon from occurring, and prevents white blur from occurring to have excellent display contrast in bright light. The hard-coated antiglare film includes a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles. The hard-coating antiglare layer is formed on at least one surface of the transparent plastic film substrate. The hard-coating antiglare layer has a surface with an uneven structure. The hard-coated antiglare film has a total haze value ht in the range of 40 to 70%. The relationship between the total haze value ht and an inner haze value hi obtained due to scattering inside the hard-coating antiglare layer is a relationship of the total haze value ht?the inner haze value hi.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: October 20, 2009
    Assignee: Nitto Denko Corporation
    Inventors: Masaki Ninomiya, Seiichi Kusumoto, Daisuke Hamamoto, Hiroyuki Takao, Takayuki Shigematsu
  • Publication number: 20090086326
    Abstract: There is provided an antiglare hard-coated film that can maintain antiglare properties and suppress a reduction in the display contrast of a display, when composed of a transparent plastic film substrate and an antiglare hard coat layer formed thereon. The antiglare hard-coated film 4 includes a transparent film substrate 1 and a hard coat layer 2 that is provided on at least one side of the transparent film substrate 1, contains fine particles 2b, and has an irregular surface, wherein the fine particles 2b have an average particle size of 6 ?m to 15 ?m and form irregularities with an average slope angle ?a of 0.4° to 1.
    Type: Application
    Filed: May 18, 2006
    Publication date: April 2, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Daisuke Hamamoto, Hiroyuki Takao, Yuuichi Kimura, Katsunori Takada, Seiichi Kusumoto, Takayuki Shigematsu
  • Patent number: 7390099
    Abstract: There are provided a hard-coated antiglare film with high hardness, high scratch resistance and good antiglare properties, a method of manufacturing the film, an optical element using the film, and an image display including the film or the optical element. The hard-coated antiglare film of the invention includes a transparent film substrate and a hard-coating layer that contains fine particles and is formed on at least one side of the transparent film substrate, wherein the hard-coating layer has a thickness of 15 ?m to 30 ?m, the fine particles have an average particle size of 30% to 75% of the thickness of the hard-coating layer, and the fine particles form unevenness with a ?a value of 0.4° to 1.5° according to JIS B 0601.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: June 24, 2008
    Assignee: Nitto Denko Corporation
    Inventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
  • Patent number: 7355663
    Abstract: A polarizing plate excellent in polarization performance in all wavebands from a short wavelength region to a long wavelength region and a liquid crystal display using such a polarizing plate. The polarizing plate including a polarizer has a portion having a polarization degree of 99% or more at each wavelength of light for wavelengths of 420 to 550 nm and a portion having a polarization degree of 99% or more at each wavelength of light for wavelengths of 550 to 700 nm.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: April 8, 2008
    Assignee: Nitto Denko Corporation
    Inventors: Yuji Saiki, Senri Kondou, Youichirou Sugino, Seiichi Kusumoto, Eiji Hamamoto, Takashi Shouda
  • Publication number: 20080026182
    Abstract: A hard-coated film is provided that has a high hardness and excellent elasticity and flexibility, can be prevented from curling due to curing and shrinking of the hard-coating layer, and can be bonded to the surfaces of various displays. A hard-coating layer is formed on one surface of a transparent plastic film substrate and a pressure-sensitive adhesive layer is formed on the other surface of the substrate. The hard-coating layer is formed of a material for forming a hard-coating layer. The material contains Components A, B, and C. Component A is at least one of urethane acrylate and urethane methacrylate. Component B is at least one of polyol acrylate and polyol methacrylate.
    Type: Application
    Filed: July 26, 2007
    Publication date: January 31, 2008
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hideo ABE, Makoto TASAKI, Seiichi KUSUMOTO, Masayuki SATAKE
  • Publication number: 20070291367
    Abstract: A hard-coated antiglare film is provided that is excellent in antiglare properties and image sharpness and that can prevent glare from occurring. The hard-coated antiglare film includes a transparent plastic film substrate and a hard-coating antiglare layer that is formed on at least one surface of the transparent plastic film substrate and that is formed of fine particles and a curable hard-coating resin. The hard-coating antiglare layer has a thickness in the range of 20 to 30 ?m. The fine particles have a weight average particle size in the range of 7 to 15 ?m. The difference obtained by subtracting the refractive index of the fine particles from that of the curable hard-coating resin that has been cured is in the range of ?0.06 to ?0.01 or 0.01 to 0.06.
    Type: Application
    Filed: June 14, 2007
    Publication date: December 20, 2007
    Applicant: NITTO DENKO CORPORATION
    Inventors: Daisuke HAMAMOTO, Hiroyuki TAKAO, Yuuichi KIMURA, Katsunori TAKADA, Seiichi KUSUMOTO, Takayuki SHIGEMATSU
  • Publication number: 20070268587
    Abstract: A hard-coated antiglare film that has excellent antiglare properties, prevents a glare phenomenon from occurring, and prevents white blur from occurring to have excellent display contrast in bright light. The hard-coated antiglare film includes a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles. The hard-coating antiglare layer is formed on at least one surface of the transparent plastic film substrate. The hard-coating antiglare layer has a surface with an uneven structure. The hard-coated antiglare film has a total haze value ht in the range of 40 to 70%. The relationship between the total haze value ht and an inner haze value hi obtained due to scattering inside the hard-coating antiglare layer is a relationship of the total haze value ht?the inner haze value hi.
    Type: Application
    Filed: May 14, 2007
    Publication date: November 22, 2007
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masaki NINOMIYA, Seiichi KUSUMOTO, Daisuke HAMAMOTO, Hiroyuki TAKAO, Takayuki SHIGEMATSU
  • Publication number: 20070253066
    Abstract: A hard-coated antiglare film is provided that has high hardness and excellent antiglare properties and can prevent white blur from occurring when viewed from oblique directions. The hard-coated antiglare film of the present invention includes a transparent plastic film substrate and a hard-coating antiglare layer that is formed of fine particles and a hard-coating resin on at least one surface of the transparent plastic film substrate. The hard-coating antiglare layer has a thickness of 15 to 30 ?m, the fine particles have a weight average particle size of 30 to 75% of a thickness of the hard-coating antiglare layer, in the unevenness of the hard-coating antiglare layer surface that is formed by the fine particles, an average tilt angle ?a is 1.0° to 2.0°, and an arithmetic average surface roughness Ra according to JIS B 0601 (1994 version) is 0.12 to 0.30 ?m.
    Type: Application
    Filed: April 24, 2007
    Publication date: November 1, 2007
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyuki Takao, Daisuke Hamamoto, Masaki Ninomiya, Seiichi Kusumoto, Takayuki Shigematsu
  • Publication number: 20070242362
    Abstract: A hard-coated antiglare film is provided that has high hardness, high scratch resistance, and good antiglare properties. In the hard-coated antiglare film of the present invention including a transparent plastic film substrate, a hard-coating layer containing fine particles is formed on at least one surface of the transparent plastic film substrate, the hard-coating layer has a thickness in the range of 15 to 30 ?m, the fine particles have a weight average particle size of 30 to 75% of a thickness of the hard-coating layer, the average tilt angle ?a of the unevenness of the hard-coating layer surface is in the range of 0.4° to 1.5°, and the hard-coating layer is formed using a resin for forming the hard-coating layer containing three specific resin components.
    Type: Application
    Filed: March 26, 2007
    Publication date: October 18, 2007
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Hiroyuki Takao, Seiichi Kusumoto, Daisuke Hamamoto, Takayuki Shigematsu
  • Publication number: 20070237966
    Abstract: A hard-coating layer is formed on at least one surface of a transparent plastic film substrate using a material for forming a hard-coating layer. The material contains Components A, B, and C. Component A is at least one of urethane acrylate and urethane methacrylate. Component B is at least one of polyol acrylate and polyol methacrylate. Component C is a polymer containing a repeating unit represented by General Formula 1 indicated below.
    Type: Application
    Filed: March 26, 2007
    Publication date: October 11, 2007
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
  • Patent number: 7209196
    Abstract: A transparent protective film for polarizing plate being provided via an adhesive layer on at least one surface of a polarizer, wherein a ratio of constituent elements (oxygen ratio/carbon ratio) on the polarizer-adhering surface of the transparent protective film for polarizing plate, which is determined by X-ray photoelectron spectrometry, is larger than 0.75 has facilitate adhesion surface and no deformation without problems attributable to saponification.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: April 24, 2007
    Assignee: Nitto Denko Corporation
    Inventors: Yuuji Saiki, Kazuki Tsuchimoto, Chiaki Harada, Seiichi Kusumoto, Yasuo Fujimura
  • Patent number: 7110177
    Abstract: The present invention provides a polarizing film or a polarizer that has an elastic modulus of at most about 3500 N/mm2 and suppresses occurrence of warping, the polarizing film is obtained by adsorbing a dichroic material in a polyvinyl alcohol-based film 20 ?m in thickness and stretching the tilin. The polarizing film has a transmittance of at least 43% and a polarization degree of at least 98%. A transparent protective layer is laminated on at least one surface of the polarizing film to form a polarizing plate.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: September 19, 2006
    Assignee: Nitto Denko Corporation
    Inventors: Youichirou Sugino, Hisashi Mihara, Kazuhiro Higashio, Seiichi Kusumoto
  • Publication number: 20060132922
    Abstract: There are provided a hard-coated antiglare film with high hardness, high scratch resistance and good antiglare properties, a method of manufacturing the film, an optical element using the film, and an image display including the film or the optical element. The hard-coated antiglare film of the invention includes a transparent film substrate and a hard-coating layer that contains fine particles and is formed on at least one side of the transparent film substrate, wherein the hard-coating layer has a thickness of 15 ?m to 30 ?m, the fine particles have an average particle size of 30% to 75% of the thickness of the hard-coating layer, and the fine particles form unevenness with a ?a value of 0.4° to 1.5° according to JIS B 0601.
    Type: Application
    Filed: December 21, 2005
    Publication date: June 22, 2006
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
  • Publication number: 20060134400
    Abstract: The invention is directed to a hard-coated film, comprising: a transparent film substrate; and a hard-coating layer formed on at least one side of the transparent film substrate, wherein the hard-coating layer is made from a material containing a urethane acrylate, a polyol (meth)acrylate and a (meth)acrylic polymer having an alkyl group containing at least two hydroxyl groups. There can be provided a hard-coated film that has high hardness and good flexibility and is resistant to curling due to hardening and shrinking and a method of manufacturing a hard-coated film in which a reduction in production efficiency associated with an increase in the number of manufacturing steps is prevented.
    Type: Application
    Filed: December 12, 2005
    Publication date: June 22, 2006
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Hiroyuki Takao, Daisuke Hamamoto, Seiichi Kusumoto, Takayuki Shigematsu
  • Patent number: 7006174
    Abstract: A polarizing film comprising a stretched film containing iodine, wherein an absorbance characteristics ratio of ((an absorption peak A in a wavelength range of 550 to 650 nm)/(an absorption peak B in a wavelength range of 450 to 520 nm)) is no more than 1.5 when the polarizing film is arranged in a crossed Nicol, form a liquid crystal display for color display that provides as neutral hue as possible, and gives good black color display, and as a result gives an outstanding reproducibility of color.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: February 28, 2006
    Assignee: Nitto Denko Corporation
    Inventors: Seiichi Kusumoto, Takashi Shouda
  • Publication number: 20050260392
    Abstract: The present invention provides a polarizer and a polarizing plate having less dimensional changes to heat stress. The present invention provides also a liquid crystal display that includes the polarizer and the polarizing plate, and is free of color irregularity or decoloration. The polarizer has shrinkage force of not more than 4.0 N/cm in the absorption axis direction after being heated at 80° C. for 30 minutes. A protective film is laminated on at least one surface of the polarizer in order to form a polarizing plate, and the polarizing plate has a following relationship of 0.01?A/B?0.16 when A denotes a thickness of the polarizer and B denotes a thickness of the protective film.
    Type: Application
    Filed: February 19, 2004
    Publication date: November 24, 2005
    Applicant: Nitto Denko Corporation
    Inventors: Youichirou Sugino, Yuuji Saiki, Senri Kondou, Eiji Hamamoto, Seiichi Kusumoto, Hisashi Mihara, Kazuki Tsuchimoto
  • Patent number: RE44315
    Abstract: The present invention provides a polarizing film or a polarizer that has an elastic modulus of at most about 3500 N/mm2 and suppresses occurrence of warping, the polarizing film is obtained by adsorbing a dichroic material in a polyvinyl alcohol-based film 20 ?m in thickness and stretching the film. The polarizing film has a transmittance of at least 43% and a polarization degree of at least 98%. A transparent protective layer is laminated on at least one surface of the polarizing film to form a polarizing plate.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: June 25, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Youichirou Sugino, Hisashi Mihara, Kazuhiro Higashio, Seiichi Kusumoto