Patents by Inventor Yutaka Nakai

Yutaka Nakai 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).

  • Publication number: 20220062949
    Abstract: According to one embodiment, a drive circuit includes a first circuit part. The first circuit part includes a first detecting part, a second detecting part, a first circuit, and a second circuit. The first detecting part is configured to detect a first piezoelectric element current flowing in a first piezoelectric element, and output a first detection signal corresponding to the first piezoelectric element current. The second detecting part is configured to detect a first capacitance element current flowing in a first capacitance element, and output a second detection signal corresponding to the first capacitance element current. The first circuit includes a first input terminal and a second input terminal. The first circuit is configured to apply a first drive signal to the first piezoelectric element and the first capacitance element. The second circuit is configured to supply a first differential signal to the second input terminal.
    Type: Application
    Filed: February 18, 2021
    Publication date: March 3, 2022
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomio ONO, Yutaka NAKAI
  • Publication number: 20220065820
    Abstract: According to one embodiment, an inspection device includes a transmitter, a receiver, and a supporter. The transmitter is configured to transmit a first ultrasonic wave including burst waves having a first period Tp. The receiver on which the first ultrasonic wave is incident is configured to output a signal corresponding to the incident first ultrasonic wave. The supporter is provided between the transmitter and the receiver. The supporter is configured to support an inspection object. The first period Tp (s), a distance Dx (m), and a velocity vx (m/s) satisfy 2Dx/((n+1)·vx)<Tp<2Dx/(n·vx). n is 1 or 2. The distance Dx is a shorter distance of first and second distances. The first distance is a distance along a first direction between the transmitter and the supporter. The second distance is a distance along the first direction between the supporter and the receiver.
    Type: Application
    Filed: March 4, 2021
    Publication date: March 3, 2022
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Yutaka NAKAI, Tomio ONO, Noriko YAMAMOTO, Kazuhiro ITSUMI
  • Publication number: 20210123796
    Abstract: According to an embodiment of the invention, a sensor includes a first element part. The first element part includes a first member and a first element. The first member is tubular and extends along a first direction. The first member includes a first opening and a second opening. A direction from the second opening toward the first opening is along the first direction. The first element includes a vibratile first membrane, and a first supporter supporting the first membrane. The second opening is between the first opening and the first membrane in the first direction.
    Type: Application
    Filed: September 4, 2020
    Publication date: April 29, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kazuhiro ITSUMI, Tomio ONO, Yutaka NAKAI, Noriko YAMAMOTO, Tsuyoshi KOBAYASHI, Akiko HIRAO, Yasuharu HOSONO, Mitsunaga SAITO
  • Publication number: 20200191687
    Abstract: A molecular detection apparatus includes a detector. The detector includes: a vibrator having a piezoelectric member that has a first surface and a second surface, a first electrode connected to the first surface, a second electrode connected to the second surface, and a third electrode connected to the second surface and disconnected from the second electrode; a sensitive film overlapping at least one part of the second electrode and at least one part of the third electrode and configured to change a vibration frequency of the vibrator in response to an interaction with target molecules; and a detection electrode to detect the changed vibration frequency.
    Type: Application
    Filed: September 5, 2019
    Publication date: June 18, 2020
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasushi SHINJO, Yongfang LI, Hirohisa MIYAMOTO, Yutaka NAKAI, Reiko YOSHIMURA
  • Patent number: 9727216
    Abstract: A mobile telephone includes a touch panel, an acceleration sensor which detects an acceleration, and an operation detection unit which detects a predetermined operation in accordance with the acceleration detected by the acceleration sensor while an instruction made by the touch panel is being detected. For this, it is possible to detect an operation to press the touch panel while a user finger is in contact with the touch panel.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: August 8, 2017
    Assignee: KYOCERA CORPORATION
    Inventors: Yutaka Nakai, Naoki Matsuo
  • Patent number: 9574213
    Abstract: The present application provides a method for producing organic acid, such as acetic acid, propionic acid, butyric acid, or another high-quality raw material designed for methane fermentation and obtained by converting waste paper and other forms of cellulose-based biomass to organic acid, wherein said method comprising a step for reacting rumen fluid collected from a ruminant animal with cellulose-containing waste matter. This method provides the effective use of cellulose-containing waste matter, which is a high-quality fermentation resource.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: February 21, 2017
    Assignee: TOHOKU UNIVERSITY
    Inventors: Yutaka Nakai, Yasunori Baba, Chika Tada, Yasuhiro Fukuda
  • Patent number: 9329382
    Abstract: According to one embodiment, a display element includes a light guide and a light extraction unit. The light guide extends in one direction, and is optically transmissive. The light extraction unit includes a displacement layer, a reflective layer provided on the displacement layer, and a light extraction layer provided on the reflective layer to oppose the light guide. A plurality of prisms are formed in one major surface of the light extraction layer opposing the reflective layer. A trough line is formed between mutually-adjacent ridgelines. The element has at least one selected from a configuration in which an angle between one of the oblique surfaces and one other major surface of the light extraction layer opposing the light guide is different between corresponding oblique surfaces of two mutually-adjacent prisms and a configuration in which the ridgelines of the prisms are non-parallel to the trough line between the ridgelines.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: May 3, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsuyoshi Hioki, Yutaka Nakai
  • Patent number: 9213179
    Abstract: According to one embodiment, a display device includes a light source, a light guide, a light extraction unit, and a drive circuit. The light source emits a first light. The light guide has a first end, a second end arranged in a first direction, and a side surface extending in the first direction. The light guide guides the first light from the first end toward the second end. The light extraction unit opposes the side surface, and includes first and second conductive units provided parallel to the side surface. The light extraction unit extracts the first light guided inside the light guide by coming close to the side surface for a state in which a voltage is applied to the first and second conductive units. The drive circuit applies the voltage between the first and second conductive units.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: December 15, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Nakai, Tsuyoshi Hioki
  • Patent number: 9183794
    Abstract: A display apparatus includes a plurality of light sources which emit light beams, a plurality of optical waveguides which guide the light beams, a plurality of scanning lines which are arranged so as to intersect with the optical waveguides, a plurality of light output elements which, at intersections of the optical waveguides and the scanning lines, output the light beams guided in the optical waveguides by electric signals from the scanning lines, and a scanning line driving unit which drives the scanning lines in a direction opposite to a direction in which the light beams are guided.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: November 10, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tsuyoshi Hioki, Yutaka Nakai
  • Patent number: 9121588
    Abstract: According to one embodiment, a display device includes: a plurality of light guide units; a light source; a support substrate; a first electrode transmissive to light provided on the second major surface; a counter substrate opposed to the second major surface and provided away from the first electrode; a second electrode transmissive to light provided on a surface of the counter substrate opposed to the second major surface; and a plurality of spacers provided between the support substrate and the counter substrate and arranged between adjacent ones of the plurality of light guide units when projected onto a plane parallel to the first direction and the second direction. Optical characteristics in a region which is surrounded by adjacent ones of the spacers, the first electrode and the second electrode are changed by a voltage which is applied between the first electrode and the second electrode.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: September 1, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Nakai, Tsuyoshi Hioki
  • Patent number: 9116266
    Abstract: A light-emitting element includes: a light source; a light guide member having a columnar shape and comprising a plurality of side surfaces containing a pair of parallel total reflection principal surfaces and other surfaces than the total reflection principal surfaces, an upper bottom surface disposed so that light from the light source reaches the total reflection principal surfaces, and a lower bottom surface disposed opposite to the upper bottom surface; clad portions provided on the other side surfaces of the light guide member than the total reflection principal surfaces, the clad portions having a smaller refractive index than that of the light guide member; and a light extraction portion provided on one part of the total reflection principal surfaces.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: August 25, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yutaka Nakai, Tsuyoshi Hioki
  • 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: 8912982
    Abstract: According to one embodiment, a display device includes a display unit, an imaging element, and a first reflecting unit. The display unit emits a light. The imaging element has a major surface and is configured to form a real image of an object at a symmetric position of the object with the major surface serving as a plane of symmetry. The imaging element includes a portion not overlapping the display unit as viewed along a normal direction of the major surface. The first reflecting unit includes a portion facing the major surface, and is configured to reflect the light emitted from the display unit and to cause the light to be incident on the portion of the imaging element not overlapping the display unit.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: December 16, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Nakai, Tsuyoshi Hioki
  • 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: 20140337784
    Abstract: A mobile telephone includes a touch panel, an acceleration sensor which detects an acceleration, and an operation detection unit which detects a predetermined operation in accordance with the acceleration detected by the acceleration sensor while an instruction made by the touch panel is being detected. For this, it is possible to detect an operation to press the touch panel while a user finger is in contact with the touch panel.
    Type: Application
    Filed: July 22, 2014
    Publication date: November 13, 2014
    Applicant: KYOCERA CORPORATION
    Inventors: Yutaka NAKAI, Naoki MATSUO
  • Publication number: 20140327706
    Abstract: According to one embodiment, a method is disclosed for adjusting a display device. The device includes light sources, light guides, light extraction units, and a controller. The light guides have an incident portion, one other end portion, and a side surface. The light extraction units form pixels. The controller supplies an electrical signal to the light extraction units to form a light-extracting state and a non light-extracting state. The method can include light intensity acquisition processing, change amount calculation processing, and light intensity modification processing. The acquisition processing acquires first and second intensities of the light. The calculation processing calculates a ratio of a difference between the first and second intensities to a difference between a first previous intensity in the light-extracting state and a second previous intensity in the non light-extracting state. The modification processing reduces the intensity of the light in the light-extracting state.
    Type: Application
    Filed: March 18, 2014
    Publication date: November 6, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yutaka NAKAI, Tsuyoshi HIOKI
  • Publication number: 20140292619
    Abstract: A display system is provided with a display apparatus including a plurality of display panels arranged in a line, and connected in series, and connectors to connect the display panels in series, an storage unit to store therein a plurality of area image data on a plurality of areas into which the image to be displayed on the display apparatus is divided, a detection unit to detect a number of connections of the display panels on the basis of a connection state of the connectors, a selection unit to select area image data corresponding to the number from the storage unit, and an output unit to output the selected area image data to the display panels.
    Type: Application
    Filed: June 13, 2014
    Publication date: October 2, 2014
    Inventors: Tsuyoshi HIOKI, Yutaka NAKAI
  • Patent number: 8831387
    Abstract: In one embodiment, in an optical device, a bar-shaped optical waveguide has either a polygonal or circular cross-sectional shape. A light entry portion is formed in a circumferential area of a first-end surface of the optical waveguide. The light entry portion includes a sloping surface having a normal vector containing a component in a circumferential direction of the first-end surface. An incident light beam travels towards a second-end surface of the optical waveguide while repeating total reflections on a side surface of the optical waveguide. The incident light beam travels without passing through a central portion in a cross section of the optical waveguide. A light exit portion is formed in the side surface of the optical waveguide. The light exit portion is configured to let the light beam in the optical waveguide out of the optical waveguide.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: September 9, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Nakai, Tsuyoshi Hioki
  • 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