Patents by Inventor Mitsutaka SASE
Mitsutaka SASE 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: 10139540Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having at least two phase difference layers and having optical properties represented by the formulae (30) and (31) is provided: ?2.0?a*?0.5??(30) ?0.5?b*?5.0??(31) wherein, a* and b* represent the chromatic coordinate in the L*a*b* color system.Type: GrantFiled: August 7, 2014Date of Patent: November 27, 2018Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
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Patent number: 9696475Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), the second phase difference layer has a thickness of 0.2 ?m to 2.0 ?m, and further, the optical film has optical properties represented by the formulae (1) and (2): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3).Type: GrantFiled: August 7, 2014Date of Patent: July 4, 2017Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
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Patent number: 9541691Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3) and the optical film has optical properties represented by the formulae (1), (2) and (30): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3) 0.001<|Rth(550)/Re(550)|<0.2??(30).Type: GrantFiled: August 7, 2014Date of Patent: January 10, 2017Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
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Patent number: 9529130Abstract: Optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer having an optical property represented by the formula (3), and the optical film has optical properties represented by the formula (1) and the formula (2). Re(450)/Re(550)?1.00(1)1.00?Re(650)/Re(550)(2)nx?ny<nz(3), wherein, Re(450) represents the in-plane phase difference value at a wavelength of 450 nm, Re(550) represents the in-plane phase difference value at a wavelength of 550 nm, and Re(650) represents the in-plane phase difference value at a wavelength of 650 nm, nx represents the principal refractive index in a direction parallel to the film plane, ny represents the refractive index in a direction parallel to the film plane and orthogonally-crossing the direction of nx, nz represents the refractive index in a direction vertical to the film plane, in an index ellipsoid formed by the phase difference layer.Type: GrantFiled: August 7, 2014Date of Patent: December 27, 2016Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
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Patent number: 9482802Abstract: A method for producing a long retardation film having an optical axis in an oblique direction relative to the length direction of the long retardation film is provided.Type: GrantFiled: August 7, 2014Date of Patent: November 1, 2016Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Mitsutaka Sase, Nobuyuki Hatanaka, Tadahiro Kobayashi
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Patent number: 9482801Abstract: A production method for producing a thin circularly polarizing plate at a high productivity is provided.Type: GrantFiled: August 7, 2014Date of Patent: November 1, 2016Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Mitsutaka Sase, Nobuyuki Hatanaka
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Patent number: 9383492Abstract: To provide an elliptical polarization plate excellent in suppression of coloration and light leakage in display. An elliptical polarization plate having a transparent protective film pasted to one surface of a polarizer and an optically anisotropic film pasted to the other surface thereof, wherein, when measured under condition of incident polarization in the film normal direction from the side of the transparent protective film, the visibility corrected single body transmittance is 43.0% or more, the visibility corrected polarization degree is 95.0% or more, the single body hue value a* is ?2.0 to 1.0 and the single body hue value b* is ?1.0 to 5.0, and the optically anisotropic film satisfies the formulae (1), (2) and (3): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) 100<Re(550)<160??(3).Type: GrantFiled: August 7, 2014Date of Patent: July 5, 2016Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
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Publication number: 20150049291Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), the second phase difference layer has a thickness of 0.2 ?m to 2.0 ?m, and further, the optical film has optical properties represented by the formulae (1) and (2): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3).Type: ApplicationFiled: August 7, 2014Publication date: February 19, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
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Publication number: 20150043071Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3) and the optical film has optical properties represented by the formulae (1), (2) and (30): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3) 0.001<|Rth(550)/Re(550)|<0.2??(30).Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
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Publication number: 20150042943Abstract: Optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer having an optical property represented by the formula (3), and the optical film has optical properties represented by the formula (1) and the formula (2). Re(450)/Re(550)?1.00(1)1.00?Re(650)/Re(550)(2)nx?ny<nz(3), wherein, Re(450) represents the in-plane phase difference value at a wavelength of 450 nm, Re(550) represents the in-plane phase difference value at a wavelength of 550 nm, and Re(650) represents the in-plane phase difference value at a wavelength of 650 nm, nx represents the principal refractive index in a direction parallel to the film plane, ny represents the refractive index in a direction parallel to the film plane and orthogonally-crossing the direction of nx, nz represents the refractive index in a direction vertical to the film plane, in an index ellipsoid formed by the phase difference layer.Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
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Publication number: 20150043072Abstract: A method for producing a long retardation film having an optical axis in an oblique direction relative to the length direction of the long retardation film is provided.Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Inventors: Mitsutaka SASE, Nobuyuki HATANAKA, Tadahiro KOBAYASHI
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Publication number: 20150042944Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having at least two phase difference layers and having optical properties represented by the formulae (30) and (31) is provided: ?2.0?a*?0.5??(30) ?0.5?b*?5.0??(31) wherein, a* and b* represent the chromatic coordinate in the L*a*b* color system.Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
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Publication number: 20150043073Abstract: A production method for producing a thin circularly polarizing plate at a high productivity is provided.Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Mitsutaka SASE, Nobuyuki HATANAKA
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Publication number: 20150042941Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), and the optical film has optical properties represented by the formulae (1), (2) and (30) is provided: ?n(450)/?n(550)?1.00??(1) 1.00??n(650)/?n(550)??(2) nx?ny<nz??(3) 0.000<T<0.1??(30).Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
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Publication number: 20150042942Abstract: To provide an elliptical polarization plate excellent in suppression of coloration and light leakage in display. An elliptical polarization plate having a transparent protective film pasted to one surface of a polarizer and an optically anisotropic film pasted to the other surface thereof, wherein, when measured under condition of incident polarization in the film normal direction from the side of the transparent protective film, the visibility corrected single body transmittance is 43.0% or more, the visibility corrected polarization degree is 95.0% or more, the single body hue value a* is ?2.0 to 1.0 and the single body hue value b* is ?1.0 to 5.0, and the optically anisotropic film satisfies the formulae (1), (2) and (3): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) 100<Re(550)<160??(3).Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU