Patents by Inventor Hajime Yamaguchi

Hajime Yamaguchi 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: 8409468
    Abstract: According to one embodiment, a liquid crystal composition includes a liquid crystal material and a polymer. The liquid crystal material exhibits a blue phase. The polymer has a first repeating unit containing a fluorine atom and an acrylic group.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: April 2, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yukio Kizaki, Hajime Yamaguchi, Yuko Kizu
  • Publication number: 20130078752
    Abstract: According to one embodiment, a method is disclosed for manufacturing a display device. A film material layer is formed on a support substrate. A first heating process for the film material layer at a first temperature to form a film layer and a second heating process for a second region surrounding a first region at a second temperature higher than the first temperature are performed. The first region is provided in a central part of the film layer. A display layer is formed in the first region and a peripheral circuit section is formed at least in a part of the second region. A third heating process is performed for at least a part of the film layer at a third temperature higher than the second temperature. In addition, the film layer is peeled off from the support substrate.
    Type: Application
    Filed: May 30, 2012
    Publication date: March 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsunori SAKANO, Kentaro MIURA, Nobuyoshi SAITO, Shintaro NAKANO, Tomomasa UEDA, Hajime YAMAGUCHI
  • Publication number: 20130075719
    Abstract: According to one embodiment, a thin film transistor includes a substrate, a gate electrode, a first insulating film, an oxide semiconductor film, a second insulating film, a source electrode, and a drain electrode. The gate electrode is provided on a part of the substrate. The first insulating film covers the gate electrode. The oxide semiconductor film is provided on the gate electrode via the first insulating film. The second insulating film is provided on a part of the oxide semiconductor film. The source and drain electrodes are respectively connected to first and second portions of the oxide semiconductor film not covered with the second insulating film. The oxide semiconductor film includes an oxide semiconductor. Concentrations of hydrogen contained in the first and second insulating films are not less than 5×1020 atm/cm3, and not more than 1019 atm/cm3, respectively.
    Type: Application
    Filed: May 30, 2012
    Publication date: March 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shintaro NAKANO, Tomomasa UEDA, Kentaro MIURA, Nobuyoshi SAITO, Tatsunori SAKANO, Hajime YAMAGUCHI
  • 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: 20130076687
    Abstract: According to one embodiment, a touch panel includes first interconnections, second interconnections, sensor units and a control unit. The first interconnections are arranged along a first direction, and extend along a second direction intersecting with the first direction. The second interconnections are arranged along a third direction intersecting with the first direction, and extend along a fourth direction intersecting with the third direction. The sensor units are provided in intersection portions of the first and second interconnections, include first and second ferromagnetic layers, and an intermediate layer, allow a current to be passed, and have one end connected to the first interconnections and another end connected to the second interconnections. The control unit is connected to the first and second interconnections. An electric resistance of the sensor units changes in accordance with a stress applied. The control unit senses a change in the electric resistance.
    Type: Application
    Filed: May 24, 2012
    Publication date: March 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Devin GIDDINGS, Nobuyoshi Saito, Hideaki Fukuzawa, Yoshihiko Fuji, Michiko Hara, 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
  • Patent number: 8373359
    Abstract: According to one embodiment, a light-emitting device includes an emitting layer, first and second electrodes, a voltage-supply circuit, an ammeter and a controller. The emitting layer includes a solution containing an emitting material and a solvent. The first and second electrodes are in contact with the solution. The voltage-supply circuit applies an operating voltage between the first and second electrodes. The ammeter measures the amount of electric current flowing between the first and second electrodes. The controller controls the operation of the voltage-supply circuit such that the polarity of the operating voltage reverses and determining a timing of reversing the polarity based on the output of the ammeter.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: February 12, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yukio Kizaki, Rei Hasegawa, Hajime Yamaguchi, Isao Amemiya
  • 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
  • Patent number: 8345206
    Abstract: A liquid crystal display includes a liquid crystal layer causing a selective reflection and exhibiting Kerr effect, first and second electrodes applying voltage to the liquid crystal layer, a first circular polarizer disposed between the liquid crystal layer and a viewer and allowing a first circularly polarized light incident on the liquid crystal layer when irradiated with a natural light, the first circularly polarized light having an electric-field vector rotating in a direction reverse to a rotation direction of an electric-field vector of a circularly polarized light selectively reflected by the liquid crystal layer, and a second circular polarizer facing the first circular polarizer with the liquid crystal layer interposed therebetween and allowing a second circularly polarized light incident on the liquid crystal layer when irradiated with a natural light.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: January 1, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rei Hasegawa, Yuko Kizu, Hajime Yamaguchi
  • Patent number: 8345193
    Abstract: An electronic device including: a thin-film substrate having a front surface being formed with electronic circuits; an adhesive layer comprising an adhesive material applied to a back surface of the thin-film substrate, the adhesive material having an elasticity modulus being in a range of 1.0×103 to 2.1×104 Pa at 80° C.; and a flexible substrate having a front surface being bonded to the back surface of the thin-film substrate with the adhesive layer.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: January 1, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Miyazaki, Hajime Yamaguchi, Masao Tanaka, Kentaro Miura, Rei Hasegawa
  • Publication number: 20120307184
    Abstract: According to one embodiment, a liquid crystal/polymer complex includes a liquid crystal material, a polymer, and a chiral agent. The liquid crystal material exhibits blue phase and contains liquid crystal molecules that are spirally arranged to form liquid crystal molecular cylinders having a spiral arrangement. The polymer maintains the arrangement and has a dendrimer-type structure including a dendrimer unit and a polymerizable unit bonded to an end of the dendrimer unit. The dendrimer unit contains a central atom and at least two branched structures bonded to the central atom and has a generation of two or more. The polymerizable unit contains a polymerizable group which can bond to a polymerizable group.
    Type: Application
    Filed: July 25, 2012
    Publication date: December 6, 2012
    Inventors: Yukio KIZAKI, Hajime Yamaguchi, Yuko Kizu, Masao Tanaka, Akiko Hirao
  • Patent number: 8325105
    Abstract: According to an aspect of the present invention, there is provided with a screen transmission device, including: a first receiver configured to receive usage state information indicating usage states of a plurality of screen display devices by a user from each the screen display device; a second receiver configured to receive a message of requesting start-up of a window from the screen display device out of the screen display devices; a determiner configured to determine a screen display device on which the window is to be started up out of the plurality of screen display devices based on the usage states of each the screen display device; a screen data generator configured to generate screen data of the window; and a transmitter configured to transmit the screen data of the window to the screen display device determined by the determiner.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: December 4, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shogo Yamaguchi, Shinya Murai, Tsuyoshi Hioki, Hajime Yamaguchi, Mitsue Fujinuki
  • Publication number: 20120248361
    Abstract: Valve stem holes (17) and pin holes (18) are formed on a valve element (3). A groove (23) is formed on the outer periphery of an insertion part (22) of a valve stem (4). In a state in which the insertion part (22) is inserted into the valve stem hole (17), the groove (23) and the pin hole (18) form an engaged part (27), and a connecting pin (16) is inserted into the pin hole (18) and is engaged with the engaged part (27) while being fit into the groove (23). In the engaged part (27), a pin contact face (30) of the connecting pin (16) is in surface contact with a groove contact face (26) in the bottom of the groove (23) and the groove contact face (26) is inclined with respect to a rotation axis (6) of the valve stem (4).
    Type: Application
    Filed: April 4, 2011
    Publication date: October 4, 2012
    Inventors: DAISHI FUJIYAMA, HAJIME YAMAGUCHI
  • Publication number: 20120242562
    Abstract: According to one embodiment, a display device includes an insulating layer, a display unit, and an organic EL layer. The display unit is provided on a major surface of the insulating layer and includes a plurality of gate lines, a plurality of signal lines, a plurality of power source lines and a plurality of pixel units arranged in a matrix configuration. The EL layer is provided on the display unit. Each pixel unit includes a drive transistor and a resistor. The drive transistor includes a drive gate electrode, a drive source electrode, and a drive drain electrode. The drive source electrode or the drive drain electrode is connected to one of the power source lines. An end of the resistor is connected to the drive gate electrode. An other end of the resistor is connected to one of the gate line, the signal line, and the power source line.
    Type: Application
    Filed: September 21, 2011
    Publication date: September 27, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Nobuyoshi SAITO, Tomomasa Ueda, Hajime Yamaguchi, Kentaro Miura, Shintaro Nakano, Tatsunori Sakano
  • Publication number: 20120223301
    Abstract: According to one embodiment, a thin film transistor includes: a substrate; a semiconductor layer; first and second insulating films; and gate, source and drain electrodes. The semiconductor layer is provided on the substrate. The semiconductor layer is made of an oxide having indium. The semiconductor layer has first and second regions and other region. The first insulating film covers a top face of the other region. The second insulating film covers at least a pair of side surfaces of the semiconductor layer. The second insulating film is formed under a condition different from that for the first insulating film. The gate electrode is provided on the first and second insulating films or below the semiconductor layer. The source and drain electrodes are provided on the first and second regions, respectively. The drain and source electrodes sandwich the pair of the side surfaces of the semiconductor layer.
    Type: Application
    Filed: September 21, 2011
    Publication date: September 6, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomomasa Ueda, Shintaro Nakano, Nobuyoshi Saito, Kentaro Miura, Yujiro Hara, Hajime Yamaguchi
  • 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
  • Publication number: 20120069283
    Abstract: According to one embodiment, a liquid crystal display includes a liquid crystal layer exhibiting Kerr effect, a first electrode including combtooth portions, a second electrode, and protruding portions facing a main surface of the liquid crystal layer with at least one of the first and second electrodes interposed therebetween. The combtooth portions each extends in a first direction and are arranged in a second direction. The second electrode includes a portion that faces the main surface and is positioned in a gap between the combtooth portions or faces the main surface with the gap interposed therebetween. The protruding portions each extends in the first direction and are arranged in the second direction. Each of the first protruding portions forms a convex surface having a ridge shape on a surface of the combtooth portion or a surface of the portion of the second electrode positioned at the gap.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 22, 2012
    Inventors: Yuko KIZU, Rei Hasegawa, 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: 20120057086
    Abstract: According to one embodiment, a liquid crystal composition includes a liquid crystal material and a polymer. The liquid crystal material exhibits a blue phase. The polymer has a first repeating unit containing a fluorine atom and an acrylic group.
    Type: Application
    Filed: March 23, 2011
    Publication date: March 8, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yukio KIZAKI, Hajime Yamaguchi, Yuko Kizu
  • 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