Patents by Inventor Senri Kondou
Senri Kondou 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: 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: 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: 6954240Abstract: A polarizing plate produced according to the present invention includes a polarizing film and a protective layer bonded to a surface of the polarizing film, where the protective layer has no irregularities like record grooves caused by stretching of the polarizing film, so that the polarizing plate with an improved appearance provides clear images even when reflected light is applied. Such a polarizing plate is produced by laminating a protective layer on at least one surface of a polarizer while limiting moisture content of the polarizer to a range from 5% to 30%. A value for the moisture content is obtained by a calculation based on an equation of moisture content (%)=[(A?B)/B]×100, when A denotes weight of the polarizer before bonding and B denotes weight of the polarizer after being kept in a dryer of 120° C. for seven hours.Type: GrantFiled: August 19, 2004Date of Patent: October 11, 2005Assignee: Nitto Denko CorporationInventors: Eiji Hamamoto, Youichirou Sugino, Kazuki Tsuchimoto, Senri Kondou, Seiichi Kusumoto
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Patent number: 6952245Abstract: A polarizing plate having excellent moisture durability and a liquid crystal display using the same are disclosed. The polarizing plate is produced by covering all surfaces and sides of a polarizer with low moisture-permeable layers having moisture permeability of 310 g/m2·24 h or less. The rate of change in dimension of the polarizer in the uniaxially stretched direction is ±0.1% or less after left at a temperature of 60° C. and humidity of 95% for 100 hours.Type: GrantFiled: July 26, 2004Date of Patent: October 4, 2005Assignee: Nitto Denko CorporationInventors: Youichirou Sugino, Eiji Hamamoto, Seiichi Kusumoto, Hisashi Mihara, Senri Kondou, Kazuki Tsuchimoto
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Patent number: 6859241Abstract: A polarizing plate produced according to the present invention includes a polarizing film and a protective layer bonded to a surface of the polarizing film, where the protective layer has no irregularities like record grooves caused by stretching of the polarizing film, so that the polarizing plate with an improved appearance provides clear images even when reflected light is applied. Such a polarizing plate is produced by laminating a protective layer on at least one surface of a polarizer while limiting moisture content of the polarizer to a range from 5% to 30%. A value for the moisture content is obtained by a calculation based on an equation of moisture content (%)=[(A?B)/B]×100, when A denotes weight of the polarizer before bonding and B denotes weight of the polarizer after being kept in a dryer of 120° C. for seven hours.Type: GrantFiled: October 16, 2001Date of Patent: February 22, 2005Assignee: Nitto Denko CorporationInventors: Eiji Hamamoto, Youichirou Sugino, Kazuki Tsuchimoto, Senri Kondou, Seiichi Kusumoto
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Publication number: 20050019505Abstract: A polarizing plate produced according to the present invention includes a polarizing film and a protective layer bonded to a surface of the polarizing film, where the protective layer has no irregularities like record grooves caused by stretching of the polarizing film, so that the polarizing plate with an improved appearance provides clear images even when reflected light is applied. Such a polarizing plate is produced by laminating a protective layer on at least one surface of a polarizer while limiting moisture content of the polarizer to a range from 5% to 30%. A value for the moisture content is obtained by a calculation based on an equation of moisture content (%)=[(A?B)/B]×100, when A denotes weight of the polarizer before bonding and B denotes weight of the polarizer after being kept in a dryer of 120° C. for seven hours.Type: ApplicationFiled: August 19, 2004Publication date: January 27, 2005Applicant: Nitto Denko CorporationInventors: Eiji Hamamoto, Youichirou Sugino, Kazuki Tsuchimoto, Senri Kondou, Seiichi Kusumoto
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Publication number: 20050001956Abstract: A polarizing plate having excellent moisture durability and a liquid crystal display using the same are disclosed. The polarizing plate is produced by covering all surfaces and sides of a polarizer with low moisture-permeable layers having moisture permeability of 310 g/m2·24 h or less. The rate of change in dimension of the polarizer in the uniaxially stretched direction is ±0.1% or less after left at a temperature of 60° C. and humidity of 95% for 100 hours.Type: ApplicationFiled: July 26, 2004Publication date: January 6, 2005Applicant: Nitto Denko CorporationInventors: Youichirou Sugino, Eiji Hamamoto, Seiichi Kusumoto, Hisashi Mihara, Senri Kondou, Kazuki Tsuchimoto
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Patent number: 6831713Abstract: A polarizing plate having excellent moisture durability and a liquid crystal display using the same are disclosed. The polarizing plate is produced by covering all surfaces and sides of a polarizer with low moisture-permeable layers having moisture permeability of 310 g/m2·24 h or less. The rate of change in dimension of the polarizer in the uniaxially stretched direction is ±0.1% or less after left at a temperature of 60° C. and humidity of 95% for 100 hours.Type: GrantFiled: February 8, 2002Date of Patent: December 14, 2004Assignee: Nitto Denko CorporationInventors: Youichirou Sugino, Eiji Hamamoto, Seiichi Kusumoto, Hisashi Mihara, Senri Kondou, Kazuki Tsuchimoto
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Patent number: 6813078Abstract: A polarizer having good durability that is dyed by iodine, and is given boric acid processing, and moreover contains zinc without generating fault by deposit of boric acid or zinc, may be produced by a process of producing, comprising the steps of: conducting a dyeing processing by iodine to a non-stretched poly vinylalcohol film; conducting an uniaxial stretching processing and a boric acid processing; subsequently conducting a zinc impregnation processing; and furthermore, conducting an iodine ion impregnation processing.Type: GrantFiled: March 13, 2003Date of Patent: November 2, 2004Assignee: Nitto Denko CorporationInventors: Seiichi Kusumoto, Hisashi Mihara, Youichirou Sugino, Yuuji Saiki, Senri Kondou, Takashi Shouda
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Patent number: 6747720Abstract: A polarizing plate is provided with an optical compensation film and includes a polarizing plate, an adhesive layer A, an optical compensation film, and an adhesive layer B adhered to one another, wherein the polarizing plate comprises a polyvinyl alcohol polarizing film containing a dichroic substance, and wherein the elastic modulus of the adhesive layer A of the polarizing plate with an optical compensation film is not greater than 0.06 MPa. Furthermore, a liquid crystal display is provided in which the polarizing plate with an optical compensation film is furnished on at least one side of the liquid crystal cell. Thus, display irregularities can be improved.Type: GrantFiled: February 8, 2002Date of Patent: June 8, 2004Assignee: Nitto Denko CorporationInventors: Yuuji Saiki, Masayuki Satake, Yasushi Takahashi, Seiichi Kusumoto, Youichirou Sugino, Takuya Matsunaga, Senri Kondou, Takashi Shouda
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Publication number: 20030174399Abstract: A polarizer having good durability that is dyed by iodine, and is given boric acid processing, and moreover contains zinc without generating fault by deposit of boric acid or zinc, may be produced by a process of producing, comprising the steps of: conducting a dyeing processing by iodine to a non-stretched poly vinylalcohol film; conducting an uniaxial stretching processing and a boric acid processing; subsequently conducting a zinc impregnation processing; and furthermore, conducting an iodine ion impregnation processing.Type: ApplicationFiled: March 13, 2003Publication date: September 18, 2003Applicant: NITTO DENKO CORPORATIONInventors: Seiichi Kusumoto, Hisashi Mihara, Youichirou Sugino, Yuuji Saiki, Senri Kondou, Takashi Shouda
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Publication number: 20030151706Abstract: A polarizing plate having excellent moisture durability and a liquid crystal display using the same are disclosed. The polarizing plate is produced by covering all surfaces and sides of a polarizer with low moisture-permeable layers having moisture permeability of 310 g/m2·24 h or less. The rate of change in dimension of the polarizer in the uniaxially stretched direction is ±0.1% or less after left at a temperature of 60° C. and humidity of 95% for 100 hours.Type: ApplicationFiled: February 8, 2002Publication date: August 14, 2003Inventors: Youichirou Sugino, Eiji Hamamoto, Seiichi Kusumoto, Hisashi Mihara, Senri Kondou, Kazuki Tsuchimoto
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Publication number: 20030151705Abstract: A polarizing plate is provided with an optical compensation film and includes a polarizing plate, an adhesive layer A, an optical compensation film, and an adhesive layer B adhered to one another, wherein the polarizing plate comprises a polyvinyl alcohol polarizing film containing a dichroic substance, and wherein the elastic modulus of the adhesive layer A of the polarizing plate with an optical compensation film is not greater than 0.06 MPa. Furthermore, a liquid crystal display is provided in which the polarizing plate with an optical compensation film is furnished on at least one side of the liquid crystal cell. Thus, display irregularities can be improved.Type: ApplicationFiled: February 8, 2002Publication date: August 14, 2003Inventors: Yuuji Saiki, Masayuki Satake, Yasushi Takahashi, Seiichi Kusumoto, Youichirou Sugino, Takuya Matsunaga, Senri Kondou, Takashi Shouda
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Patent number: 6600529Abstract: A thin polarizing plate is disclosed that includes a polarizer, a protective layer formed on at least one side of the polarizer, and a pressure sensitive adhesive layer formed on the protective layer, wherein the thickness A of the polarizer, the thickness B of the protective layer, the modulus of elasticity C of a pressure sensitive adhesive of the pressure sensitive adhesive layer, a numerical value 1 and a numerical value 2 satisfy the following relationships: (numerical value 1)=B/A<2.0 (numerical value 2)=(numerical value 1)/C<20 thereby providing a thin and light-weighted polarizing plate. A thin and light weighted liquid crystal display using the described polarizing plate is also disclosed.Type: GrantFiled: February 8, 2002Date of Patent: July 29, 2003Assignee: Nitto Denko CorporationInventors: Seiichi Kusumoto, Eiji Hamamoto, Youichirou Sugino, Hisashi Mihara, Senri Kondou, Kazuki Tsuchimoto
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Publication number: 20030086170Abstract: A polarizing plate for a liquid crystal display and a liquid crystal display comprising the polarizing plate are provided.Type: ApplicationFiled: October 3, 2001Publication date: May 8, 2003Inventors: Eiji Hamamoto, Youichirou Sugino, Kazuki Tsuchimoto, Senri Kondou, Seiichi Kusumoto
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Publication number: 20030071938Abstract: A polarizing plate produced according to the present invention includes a polarizing film and a protective layer bonded to a surface of the polarizing film, where the protective layer has no irregularities like record grooves caused by stretching of the polarizing film, so that the polarizing plate with an improved appearance provides clear images even when reflected light is applied. Such a polarizing plate is produced by laminating a protective layer on at least one surface of a polarizer while limiting moisture content of the polarizer to a range from 5% to 30%. A value for the moisture content is obtained by a calculation based on an equation of moisture content (%)=[(A−B)/B]×100, when A denotes weight of the polarizer before bonding and B denotes weight of the polarizer after being kept in a dryer of 120° C. for seven hours.Type: ApplicationFiled: October 16, 2001Publication date: April 17, 2003Inventors: Eiji Hamamoto, Youichirou Sugino, Kazuki Tsuchimoto, Senri Kondou, Seiichi Kusumoto
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Publication number: 20020075428Abstract: 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: ApplicationFiled: October 23, 2001Publication date: June 20, 2002Inventors: Yuji Saiki, Senri Kondou, Youichirou Sugino, Seiichi Kusumoto, Eiji Hamamoto, Takashi Shouda
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Publication number: 20020015807Abstract: 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: June 15, 2001Publication date: February 7, 2002Inventors: Youichirou Sugino, Yuuji Saiki, Senri Kondou, Eiji Hamamoto, Seiichi Kusumoto, Hisashi Mihara, Kazuki Tsuchimoto