Patents by Inventor Daisuke Hamamoto

Daisuke Hamamoto 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: 9244205
    Abstract: A hard-coated antiglare film that has superior antiglare properties, allow high definition to be provided even in the case of a low haze value, can prevent white blur in an oblique direction from occurring and, and can improve the depth of black in black display, as well as a polarizing plate, and the like. The hard-coated antiglare film includes a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles, which is on at least one surface of the transparent plastic film substrate. The hard-coated antiglare film has a total haze value Ht in the range of 10% to 35%. The total haze value Ht and an internal haze value Hin satisfy a relationship of 0.5?Hin/Ht?0.9. The surface of the hard-coating antiglare layer has an uneven shape and an arithmetic average surface roughness Ra in the range of 0.1 to 0.3 ?m.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: January 26, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Naoki Tsuno, Daisuke Hamamoto, Hiroki Kuramoto
  • Patent number: 8591046
    Abstract: The present invention provides a hard-coated antiglare film that has an extremely low haze value, superior anti-fluorescent lamp glare properties, and anti-face glare properties, and can improve the depth of black in black display by preventing white blur from occurring. The hard-coated antiglare film: including a transparent plastic film substrate; and a hard-coating antiglare layer containing fine particles, and has a total haze value in a range of 0% to 5%. The number Ntotal of convexities and the number N50 of convexities satisfy the relationship 0.4?N50/Ntotal?0.8. And the number of convexities in which line segments of portions of the mean line that cross the convexities each have a length of 50 ?m or shorter, among convexities the exceed a second standard line that is parallel with the mean line and is located at a height of 0.2 ?m, is 10 or less.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: November 26, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Daisuke Hamamoto, Naoki Hashimoto, Hiroki Kuramoto
  • Patent number: 8503081
    Abstract: A hard-coated antiglare film that has superior antiglare properties, allow high definition to be provided even in the case of a low haze value, can prevent white blur in an oblique direction from occurring and, and can improve the depth of black in black display, as well as a polarizing plate, and the like. The hard-coated antiglare film includes a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles, which is on at least one surface of the transparent plastic film substrate. The hard-coated antiglare film has a total haze value Ht in the range of 10% to 35%. The total haze value Ht and an internal haze value Hin satisfy a relationship of 0.5?Hin/Ht?0.9. The surface of the hard-coating antiglare layer has an uneven shape and an arithmetic average surface roughness Ra in the range of 0.1 to 0.3 ?m.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: August 6, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Naoki Tsuno, Daisuke Hamamoto, Hiroki Kuramoto
  • Patent number: 8215780
    Abstract: A hard-coated antiglare film, comprising a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles on at least one surface of the transparent plastic film substrate, wherein an arithmetic average surface roughness Ra (?m) that is defined in JIS B 0601 (1994 version) is in the range of 0.05 to 0.15 ?m in an uneven shape of a surface of the hard-coating antiglare layer, and the hard-coated antiglare film includes at least 80 convexities that exceed a roughness mean line of a surface roughness profile in a 4-mm long portion at an arbitrary location of the surface of the hard-coating antiglare layer.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: July 10, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Naoki Tsuno, Daisuke Hamamoto, Hiroki Ozawa, Hiroki Kuramoto
  • 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
  • Publication number: 20110080645
    Abstract: A hard-coated antiglare film that has superior antiglare properties, allow high definition to be provided even in the case of a low haze value, can prevent white blur in an oblique direction from occurring and, and can improve the depth of black in black display, as well as a polarizing plate, and the like. The hard-coated antiglare film includes a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles, which is on at least one surface of the transparent plastic film substrate. The hard-coated antiglare film has a total haze value Ht in the range of 10% to 35%. The total haze value Ht and an internal haze value Hin satisfy a relationship of 0.5?Hin/Ht?0.9. The surface of the hard-coating antiglare layer has an uneven shape and an arithmetic average surface roughness Ra in the range of 0.1 to 0.3 ?m.
    Type: Application
    Filed: October 7, 2010
    Publication date: April 7, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Naoki Tsuno, Daisuke Hamamoto, Hiroki Kuramoto
  • Publication number: 20110080643
    Abstract: A hard-coated antiglare film that has superior antiglare properties, and reflection properties even when a haze value is low, and can improve the depth of black in black display by preventing “tinting” occurs specifically when a reflection is reduced, a polarizing plate, and the like. The film has a reflection intensity ratio of 3 or less, a hard-coating antiglare layer containing fine particles, and an antireflection layer. A surface of the antireflection layer has an uneven shape, and an average angle of inclination ?a and an arithmetic average surface roughness Ra in predetermined ranges. At the surface of the antireflection layer, convexities exceeding a roughness mean line of a surface roughness profile in a predetermined number range, and convexities exceeding a standard line that is in parallel with the mean line and is located at a height of 0.1 ?m in predetermined size and number ranges are included.
    Type: Application
    Filed: October 7, 2010
    Publication date: April 7, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Teppei Niinou, Daisuke Hamamoto
  • Publication number: 20110080644
    Abstract: A hard-coated antiglare film that has an extremely low haze value, superior anti-fluorescent lamp glare properties, and anti-face glare properties, and can improve the depth of black in black display by preventing white blur from occurring, a polarizing plate, and the like. The hard-coated antiglare film includes: a transparent plastic film substrate; and a hard-coating antiglare layer containing fine particles, which is on at least one surface of the transparent plastic film substrate, and has a total haze value in a range of 0% to 5%. The number Ntotal of convexities that exceed a first standard line that is parallel with a roughness mean line of a surface roughness profile and is located at a height of 0.1 ?m is at least 15 in a 4-mm long portion at an arbitrary location of the surface of the hard-coating antiglare layer.
    Type: Application
    Filed: October 7, 2010
    Publication date: April 7, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Daisuke Hamamoto, Naoki Hashimoto, Hiroki Kuramoto
  • Patent number: 7901746
    Abstract: A transparent conductive film of the present invention comprises: a transparent film substrate; a hard-coating layer provided on one side of the transparent film substrate; and a transparent conductive thin layer provided on another 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 two or more hydroxyl groups. The transparent conductive film of the present invention has good scratch resistance.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: March 8, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Tomonori Noguchi, Katsunori Takada, Hiroyuki Takao, Daisuke Hamamoto
  • 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: 20090244710
    Abstract: A hard-coated antiglare film, comprising a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles on at least one surface of the transparent plastic film substrate, wherein an arithmetic average surface roughness Ra (?m) that is defined in JIS B 0601 (1994 version) is in the range of 0.05 to 0.15 ?m in an uneven shape of a surface of the hard-coating antiglare layer, and the hard-coated antiglare film includes at least 80 convexities that exceed a roughness mean line of a surface roughness profile in a 4-mm long portion at an arbitrary location of the surface of the hard-coating antiglare layer.
    Type: Application
    Filed: March 30, 2009
    Publication date: October 1, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Naoki TSUNO, Daisuke HAMAMOTO, Hiroki OZAWA, Hiroki KURAMOTO
  • Patent number: 7569269
    Abstract: A hard coat film of the present invention comprises a hard coat layer, which is a cured coat layer, provided on at least one side of a transparent plastic film substrate, wherein a hard coat layer forming material comprises urethane acrylate (A); isocyanuric acid acrylate (B) and inorganic ultrafine particles (C), and has a high hardness and suppresses curling due to cracking and cure shrinkage.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: August 4, 2009
    Assignee: Nitto Denko Corporation
    Inventors: Katsunori Takada, Daisuke Hamamoto, 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
  • Publication number: 20090029151
    Abstract: A transparent conductive film of the present invention comprises: a transparent film substrate; a hard-coating layer provided on one side of the transparent film substrate; and a transparent conductive thin layer provided on another 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 two or more hydroxyl groups. The transparent conductive film of the present invention has good scratch resistance.
    Type: Application
    Filed: January 12, 2007
    Publication date: January 29, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomonori Noguchi, Katsunori Takada, Hiroyuki Takao, Daisuke Hamamoto
  • 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
  • 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