Patents by Inventor Hitoshi Nagato

Hitoshi Nagato 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: 9268074
    Abstract: According to one embodiment, a display device includes an interference filter including following layers, and a display layer. The first common layer includes first and second regions. The second common layer faces the first common layer. The first spacer layer is provided between the first and second common layers and includes first and second portions facing the first and second regions. The thickness of the first portion is different from the thickness of the second portion. The second spacer layer faces at least one of the first and second portions through the second common layer and is made of the same material as that of the first spacer layer. The coating layer faces the second common layer through the second spacer layer.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: February 23, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hitoshi Nagato, Takashi Miyazaki, Rei Hasegawa, Kouji Suzuki, Masaki Atsuta
  • Patent number: 8939594
    Abstract: According to one embodiment, a display device includes a light-guiding body, a light source, a wavelength selection transmission layer, and a light control layer. The light-guiding body has a first major surface, a second major surface opposite to the first major surface, and a side face connecting the first major surface and the second major surface. The wavelength selection transmission layer is provided on the second major surface. The first major surface has a plurality of concave portions having inclined faces inclined relative to the first major surface. A ratio of a total area of the plurality of the concave portions projected on the first major surface, relative to an area of the first major surface is 8% to 25%. The plurality of the concave portions is evenly provided in the first major surface.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: January 27, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Miyazaki, Hitoshi Nagato, Hajime Yamaguchi, Rei Hasegawa, Yutaka Nakai
  • Publication number: 20150022765
    Abstract: According to one embodiment, a display device includes a main substrate, and a light control layer. The main substrate includes a main base having a main surface, a wavelength selective transmission layer provided on the main surface, and a circuit layer provided on the wavelength selective transmission layer. The light control layer is stacked with the main substrate and has variable optical characteristics. The wavelength selective transmission layer includes lower and upper reflecting layers, and first and second spacer layers. The upper reflecting layer is provided on the lower reflecting layer. The first spacer layer is provided between the lower and upper reflecting layers. The second spacer layer is provided between the lower and upper reflecting layers, and has a different thickness from the first spacer layer. The circuit layer includes first and second pixel electrodes, and first and second switching elements.
    Type: Application
    Filed: October 2, 2014
    Publication date: January 22, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi NAGATO, Takashi Miyazaki, Yutaka Nakai, Hajime Yamaguchi, Koji Suzuki, Rei Hasegawa
  • Patent number: 8899769
    Abstract: According to one embodiment, a display device includes a light-guiding body, a light source, a wavelength selection transmission layer, and a light control layer. The light-guiding body has a first major surface, a second major surface opposite to the first major surface, and a side face connecting the first major surface and the second major surface. The wavelength selection transmission layer is provided on the second major surface. The first major surface has a plurality of concave portions having inclined faces inclined relative to the first major surface. A ratio of a total area of the plurality of the concave portions projected on the first major surface, relative to an area of the first major surface is 8% to 25%. The plurality of the concave portions is evenly provided in the first major surface.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: December 2, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Miyazaki, Hitoshi Nagato, Hajime Yamaguchi, Rei Hasegawa, Yutaka Nakai
  • Publication number: 20140285753
    Abstract: According to one embodiment, a display device includes a first polarizing layer configured to transmit light polarized in a first direction, a second polarizing layer configured to transmit light polarized in a second direction, a display layer provided between the first polarizing layer and the second polarizing layer, an interference filter provided between the first polarizing layer and the display layer, and a refracting layer. The refracting layer includes a first layer and a second layer contacting the first layer. The second polarizing layer is disposed between the refracting layer and the display layer. The second layer is provided between the first layer and the second polarizing layer. The first layer includes a protrusion extending along the first direction and protruding toward the second polarizing layer.
    Type: Application
    Filed: February 4, 2014
    Publication date: September 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi NAGATO, Takashi MIYAZAKI, Rei HASEGAWA, Koji SUZUKI, Masaki ATSUTA
  • Patent number: 8810754
    Abstract: According to one embodiment, an interference filter includes a base body, a lower semi-transmissive layer, and an upper semi-transmissive layer. The base body includes a major surface. The lower semi-transmissive layer is provided on the major surface. The upper semi-transmissive layer is provided on the lower semi-transmissive layer. The base body, the lower and upper semi-transmissive layers form a first region to selectively transmit blue light, a second region to selectively transmit green light, and a third region to selectively transmit red light, arranged in a plane parallel to the major surface. A distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the second region is shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the first region, and shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the third region.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: August 19, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi Nagato, Takashi Miyazaki, Yutaka Nakai, Hajime Yamaguchi
  • Patent number: 8810557
    Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a first electrode, a second electrode, a partition electrode, a luminescent layer and a voltage source. The luminescent layer includes a luminescent material emitting light rays due to an electrochemical oxidation or reduction reaction thereof. The voltage source is configured to generate a driving voltage between the first and second electrodes so as to apply first and second potentials, wherein the first and second potentials are maintained at one and opposite polarities in respect to the reference potential during a predetermined segment period respectively and are periodically reversed, each of the first and second potentials is changed first to second absolute levels during the predetermined segment period, the second absolute potential is determined depending on the gradation of input image data, and the first absolute potential is higher than the second absolute potential.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: August 19, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yukio Kizaki, Rei Hasegawa, Hajime Yamaguchi, Hitoshi Nagato, Yukitami Mizuno, Isao Amemiya, Tomio Ono
  • Publication number: 20140071534
    Abstract: According to one embodiment, a display device includes an interference filter including following layers, and a display layer. The first common layer includes first and second regions. The second common layer faces the first common layer. The first spacer layer is provided between the first and second common layers and includes first and second portions facing the first and second regions. The thickness of the first portion is different from the thickness of the second portion. The second spacer layer faces at least one of the first and second portions through the second common layer and is made of the same material as that of the first spacer layer. The coating layer faces the second common layer through the second spacer layer.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 13, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hitoshi NAGATO, Takashi MIYAZAKI, Rei HASEGAWA, Kouji SUZUKI, Masaki ATSUTA
  • Patent number: 8643805
    Abstract: A backlight includes a case having plural apertures in a main face thereof and a light source disposed in the case. A total area of the plural apertures is not less than 8% and not more than 15% of an area of the main face.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: February 4, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi Nagato, Takashi Miyazaki, Yutaka Nakai, Hajime Yamaguchi
  • Publication number: 20130271698
    Abstract: A backlight includes a case having plural apertures in a main face thereof and a light source disposed in the case. A total area of the plural apertures is not less than 8% and not more than 15% of an area of the main face.
    Type: Application
    Filed: June 12, 2013
    Publication date: October 17, 2013
    Inventors: Hitoshi NAGATO, Takashi Miyazaki, Yutaka Nakai, Hajime Yamaguchi
  • Publication number: 20130242237
    Abstract: According to one embodiment, a liquid crystal display apparatus includes an interference filter, a transistor, a substrate, and a liquid crystal layer. The interference filter includes a first area and a second area. The first area transmits light in a first wavelength band and reflects light except the first wavelength band. The second area transmits white light. The transistor is provided on the first area and the second area. The substrate faces the interference filter. The liquid crystal layer is provided between the interference filter and the substrate.
    Type: Application
    Filed: December 18, 2012
    Publication date: September 19, 2013
    Inventors: Hitoshi NAGATO, Takashi Miyazaki, Rei Hasegawa, Koji Suzuki, Yuko Kizu, Masaki Atsuta
  • Patent number: 8531644
    Abstract: According to one embodiment, an optical device includes an optically variable layer and first and second electrodes. The optically variable layer includes a material having dielectric anisotropy and a solvatochromic dye. The first and second electrodes are configured to apply a voltage to the optically variable layer. According to another embodiment, a display includes an optical device and a driving circuit. The optical device includes an optically variable layer and first and second electrodes. The optically variable layer includes a material having dielectric anisotropy and a solvatochromic dye. The first and second electrodes are configured to driving circuit is configured to put a drive voltage across the first and second electrodes.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: September 10, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hajime Yamaguchi, Rei Hasegawa, Takashi Miyazaki, Hitoshi Nagato, Haruhi Oooka
  • Publication number: 20130188253
    Abstract: According to one embodiment, a substrate with an interference filter layer includes a plate-like first substrate and a filter layer. The filter layer includes optically semi-transparent first and second reflective layers and a light-transmitting layer, the light-transmitting layer being formed of first, second, and third spacer layers, the first, second, and third spacer layers being optically transparent, the light-transmitting layer including first, second, and third areas which include the first spacer layer in common, the first, second, and third areas having different optical film thicknesses due to the second and the third spacer layers, the first, second, and the third areas transmitting light with different wavelengths.
    Type: Application
    Filed: July 20, 2012
    Publication date: July 25, 2013
    Inventors: Yutaka NAKAI, Tomio Ono, Yoshinori Honguh, Hideki Nukada, Yuzo Hirayama, Hitoshi Nagato, Takashi Miyazaki
  • Publication number: 20130077029
    Abstract: According to one embodiment, an interference filter includes a base body, a lower semi-transmissive layer, and an upper semi-transmissive layer. The base body includes a major surface. The lower semi-transmissive layer is provided on the major surface. The upper semi-transmissive layer is provided on the lower semi-transmissive layer. The base body, the lower and upper semi-transmissive layers form a first region to selectively transmit blue light, a second region to selectively transmit green light, and a third region to selectively transmit red light, arranged in a plane parallel to the major surface. A distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the second region is shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the first region, and shorter than a distance between the lower semi-transmissive layer and the upper semi-transmissive layer in the third region.
    Type: Application
    Filed: June 8, 2012
    Publication date: March 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi NAGATO, Takashi Miyazaki, Yutaka Nakai, Hajime Yamaguchi
  • Publication number: 20130070482
    Abstract: According to one embodiment, a display device includes a light-guiding body, a light source, a wavelength selection transmission layer, and a light control layer. The light-guiding body has a first major surface, a second major surface opposite to the first major surface, and a side face connecting the first major surface and the second major surface. The wavelength selection transmission layer is provided on the second major surface. The first major surface has a plurality of concave portions having inclined faces inclined relative to the first major surface. A ratio of a total area of the plurality of the concave portions projected on the first major surface, relative to an area of the first major surface is 8% to 25%. The plurality of the concave portions is evenly provided in the first major surface.
    Type: Application
    Filed: June 7, 2012
    Publication date: March 21, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takashi MIYAZAKI, Hitoshi NAGATO, Hajime YAMAGUCHI, Rei HASEGAWA, Yutaka NAKAI
  • Publication number: 20130021556
    Abstract: According to one embodiment, a display device includes a main substrate, and a light control layer. The main substrate includes a main base having a main surface, a wavelength selective transmission layer provided on the main surface, and a circuit layer provided on the wavelength selective transmission layer. The light control layer is stacked with the main substrate and has variable optical characteristics. The wavelength selective transmission layer includes lower and upper reflecting layers, and first and second spacer layers. The upper reflecting layer is provided on the lower reflecting layer. The first spacer layer is provided between the lower and upper reflecting layers. The second spacer layer is provided between the lower and upper reflecting layers, and has a different thickness from the first spacer layer. The circuit layer includes first and second pixel electrodes, and first and second switching elements.
    Type: Application
    Filed: May 29, 2012
    Publication date: January 24, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi NAGATO, Takashi MIYAZAKI, Yutaka NAKAI, Hajime YAMAGUCHI, Koji SUZUKI, Rei HASEGAWA
  • Publication number: 20120176423
    Abstract: According to one embodiment, a display device includes an optical switch panel, and a light source device. The optical switch panel includes pixels and a drive part controlling transmissivity of the pixels. The light source device is stacked with the panel and includes a light source to emit a source light, a light guiding unit, interference filters, and light controlling parts. The light guiding unit includes a light guide region guiding the source light, a reflecting part provided around the region to reflect the source light, and apertures provided around the region and causing semi-collimated light to be emitted. The interference filters cause lights in certain wavelength dands of the light emitted from the aperture to pass. The light controlling parts cause the lights through the filters to enter the pixels to form an image.
    Type: Application
    Filed: March 19, 2012
    Publication date: July 12, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi NAGATO, Takashi MIYAZAKI, Yutaka NAKAI, Tomio ONO, Yoshinori HONGUH, Hideki NUKADA, Yuzo HIRAYAMA, Hajime YAMAGUCHI
  • Patent number: 8134773
    Abstract: A display device includes: an optical cell including: a first electrode; a second electrode; an ion conduction layer facing the first electrode and the second electrode and containing a mobile ion; and a first nanostructure provided between the first electrode and the ion conduction layer and being electrically connected to the first electrode. The first nanostructure has a first plasmon resonance wavelength in a visible light region and contains a first metal element. A first metal compound layer which contains the first metal element contained in the first nanostructure and has a refractive index different from a refractive index of the ion conduction layer is formed on at least a part of a surface of the first nanostructure by applying a voltage between the first electrode and the second electrode.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: March 13, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Miyazaki, Rei Hasegawa, Hajime Yamaguchi, Hitoshi Nagato, Haruhi Oooka, Shuichi Uchikoga
  • Publication number: 20120038848
    Abstract: A backlight includes a case having plural apertures in a main face thereof and a light source disposed in the case. A total area of the plural apertures is not less than 8% and not more than 15% of an area of the main face.
    Type: Application
    Filed: March 4, 2011
    Publication date: February 16, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi NAGATO, Takashi Miyazaki, Yutaka Nakai, Hajime Yamaguchi
  • Publication number: 20110279756
    Abstract: According to one embodiment, an optical device includes an optically variable layer and first and second electrodes. The optically variable layer includes a material having dielectric anisotropy and a solvatochromic dye. The first and second electrodes are configured to apply a voltage to the optically variable layer. According to another embodiment, a display includes an optical device and a driving circuit. The optical device includes an optically variable layer and first and second electrodes. The optically variable layer includes a material having dielectric anisotropy and a solvatochromic dye. The first and second electrodes are configured to driving circuit is configured to put a drive voltage across the first and second electrodes.
    Type: Application
    Filed: May 19, 2011
    Publication date: November 17, 2011
    Inventors: Hajime Yamaguchi, Rei Hasegawa, Takashi Miyazaki, Hitoshi Nagato, Haruhi Oooka