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).
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Patent number: 8124215Abstract: 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: GrantFiled: March 26, 2007Date of Patent: February 28, 2012Assignee: Nitto Denko CorporationInventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
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Patent number: 7968183Abstract: 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: GrantFiled: March 26, 2007Date of Patent: June 28, 2011Assignee: Nitto Denko CorporationInventors: Katsunori Takada, Hiroyuki Takao, Seiichi Kusumoto, Daisuke Hamamoto, Takayuki Shigematsu
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Patent number: 7963660Abstract: 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: GrantFiled: May 18, 2006Date of Patent: June 21, 2011Assignee: Nitto Denko CorporationInventors: Daisuke Hamamoto, Hiroyuki Takao, Yuuichi Kimura, Katsunori Takada, Seiichi Kusumoto, Takayuki Shigematsu
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Patent number: 7604358Abstract: 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: GrantFiled: May 14, 2007Date of Patent: October 20, 2009Assignee: Nitto Denko CorporationInventors: Masaki Ninomiya, Seiichi Kusumoto, Daisuke Hamamoto, Hiroyuki Takao, Takayuki Shigematsu
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Publication number: 20090086326Abstract: 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: ApplicationFiled: May 18, 2006Publication date: April 2, 2009Applicant: NITTO DENKO CORPORATIONInventors: Daisuke Hamamoto, Hiroyuki Takao, Yuuichi Kimura, Katsunori Takada, Seiichi Kusumoto, Takayuki Shigematsu
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Patent number: 7390099Abstract: 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: GrantFiled: December 21, 2005Date of Patent: June 24, 2008Assignee: Nitto Denko CorporationInventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
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Patent number: 7355663Abstract: 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: GrantFiled: October 23, 2001Date of Patent: April 8, 2008Assignee: Nitto Denko CorporationInventors: Yuji Saiki, Senri Kondou, Youichirou Sugino, Seiichi Kusumoto, Eiji Hamamoto, Takashi Shouda
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Publication number: 20080026182Abstract: 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: ApplicationFiled: July 26, 2007Publication date: January 31, 2008Applicant: NITTO DENKO CORPORATIONInventors: Hideo ABE, Makoto TASAKI, Seiichi KUSUMOTO, Masayuki SATAKE
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Publication number: 20070291367Abstract: 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: ApplicationFiled: June 14, 2007Publication date: December 20, 2007Applicant: NITTO DENKO CORPORATIONInventors: Daisuke HAMAMOTO, Hiroyuki TAKAO, Yuuichi KIMURA, Katsunori TAKADA, Seiichi KUSUMOTO, Takayuki SHIGEMATSU
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Publication number: 20070268587Abstract: 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: ApplicationFiled: May 14, 2007Publication date: November 22, 2007Applicant: NITTO DENKO CORPORATIONInventors: Masaki NINOMIYA, Seiichi KUSUMOTO, Daisuke HAMAMOTO, Hiroyuki TAKAO, Takayuki SHIGEMATSU
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Publication number: 20070253066Abstract: 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: ApplicationFiled: April 24, 2007Publication date: November 1, 2007Applicant: NITTO DENKO CORPORATIONInventors: Hiroyuki Takao, Daisuke Hamamoto, Masaki Ninomiya, Seiichi Kusumoto, Takayuki Shigematsu
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Publication number: 20070242362Abstract: 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: ApplicationFiled: March 26, 2007Publication date: October 18, 2007Applicant: NITTO DENKO CORPORATIONInventors: Katsunori Takada, Hiroyuki Takao, Seiichi Kusumoto, Daisuke Hamamoto, Takayuki Shigematsu
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Publication number: 20070237966Abstract: 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: ApplicationFiled: March 26, 2007Publication date: October 11, 2007Applicant: NITTO DENKO CORPORATIONInventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
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Patent number: 7209196Abstract: 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: GrantFiled: April 23, 2002Date of Patent: April 24, 2007Assignee: Nitto Denko CorporationInventors: Yuuji Saiki, Kazuki Tsuchimoto, Chiaki Harada, Seiichi Kusumoto, Yasuo Fujimura
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Patent number: 7110177Abstract: 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: GrantFiled: January 21, 2003Date of Patent: September 19, 2006Assignee: Nitto Denko CorporationInventors: Youichirou Sugino, Hisashi Mihara, Kazuhiro Higashio, Seiichi Kusumoto
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Publication number: 20060132922Abstract: 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: ApplicationFiled: December 21, 2005Publication date: June 22, 2006Applicant: NITTO DENKO CORPORATIONInventors: Hiroyuki Takao, Daisuke Hamamoto, Katsunori Takada, Seiichi Kusumoto, Yuuichi Kimura, Takayuki Shigematsu
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Publication number: 20060134400Abstract: 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: ApplicationFiled: December 12, 2005Publication date: June 22, 2006Applicant: NITTO DENKO CORPORATIONInventors: Katsunori Takada, Hiroyuki Takao, Daisuke Hamamoto, Seiichi Kusumoto, Takayuki Shigematsu
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Patent number: 7006174Abstract: 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: GrantFiled: February 5, 2002Date of Patent: February 28, 2006Assignee: Nitto Denko CorporationInventors: Seiichi Kusumoto, Takashi Shouda
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Publication number: 20050260392Abstract: 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: ApplicationFiled: February 19, 2004Publication date: November 24, 2005Applicant: Nitto Denko CorporationInventors: Youichirou Sugino, Yuuji Saiki, Senri Kondou, Eiji Hamamoto, Seiichi Kusumoto, Hisashi Mihara, Kazuki Tsuchimoto
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Patent number: RE44315Abstract: 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: GrantFiled: July 25, 2012Date of Patent: June 25, 2013Assignee: Nitto Denko CorporationInventors: Youichirou Sugino, Hisashi Mihara, Kazuhiro Higashio, Seiichi Kusumoto