Patents by Inventor Tomohiro Yamada

Tomohiro Yamada 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: 7446465
    Abstract: A multi-color luminous fluorescent display device includes therein a vacuum-sealed vessel having a glass substrate, an anode disposed on the glass substrate, a cathode installed in the vacuum-sealed vessel, a first phosphorescent layer containing a phosphor emitting yellow to red light, and a second phosphorescent layer containing a phosphor emitting blue to green light. The first phosphorescent layer contains a Ln2O2S:Eu phosphor (Ln is at least one selected from a group consisting of La, Gd, Lu and Y) which emits yellow to red light, and the second phosphorescent layer contains at least one phosphor selected from ZnO:Zn phosphor, ZnGa2O4 phosphor and ZnGa2O4:Mn phosphor which emit blue to green light.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: November 4, 2008
    Assignee: Futaba Corporation
    Inventors: Hitoshi Toki, Takuya Hamada, Tomohiro Yamada, Masahiro Kato
  • Publication number: 20080246970
    Abstract: A sensor device is formed from a metal film having a plurality of openings, a sensor material positioned within each of the openings, a light source that emits light having a first wavelength, and a light detector that detects light emitted from the light source and transmitted through or reflected from the openings. The plurality of openings are arranged periodically in a first direction in the metal film, and both a size of each of the plurality of openings and an interval thereof in the first direction are equal to or less than the wavelength of the light.
    Type: Application
    Filed: June 2, 2008
    Publication date: October 9, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ryo Kuroda, Natsuhiko Mizutani, Takako Yamaguchi, Yasuhisa Inao, Tomohiro Yamada
  • Patent number: 7432718
    Abstract: An electronic device includes a main body, a drive mechanism configured to move the main body, a detector having a plurality of sensors mounted in the main body for detecting distances to an object which is present in a space around the main body, a calculator configured to calculate a direction of the object relative to the main body based on the detected distances, and a controller configured to control the drive mechanism to change an orientation of the main body dependent on the calculated direction.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: October 7, 2008
    Assignee: Sony Corporation
    Inventors: Atsushi Ishihara, Tomohiro Yamada, Yoshihiro Chosokabe
  • Patent number: 7427820
    Abstract: A lower electrode 4 and an auxiliary electrode 8, a piezoelectric/electrostrictive film 5, and an upper electrode 6 are sequentially arranged in layers on a substrate 1. The lower electrode 4 is continuously formed in a region ranging from a first portion of the thick-walled portion 2 to a thin-walled diaphragm portion 3. The auxiliary electrode 8 is continuously formed in a region ranging from a second portion of the thick-walled portion 2 opposite the first portion to a position on the thin-walled diaphragm portion 3, the position being separated from the lower electrode 4. The upper electrode 6 is formed in such a manner as to overlie the piezoelectric/electrostrictive film 5 and the auxiliary electrode 8. Furthermore, a connection electrode 20 is provided for electrically connecting the upper electrode 6 and the auxiliary electrode 8. Thus, a plurality of paths are provided for electrically connecting the upper electrode 6 and the auxiliary electrode 8.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: September 23, 2008
    Assignee: NGK Insulators, Ltd.
    Inventors: Kunihiko Yoshioka, Takao Ohnishi, Tomohiro Yamada
  • Patent number: 7424827
    Abstract: In an inspecting method of a piezoelectric/electrostrictive actuator having a piezoelectric/electrostrictive element and two or more electrodes, the frequency response characteristics is picked up when a vibration is given to the piezoelectric/electrostrictive actuator, and the amount of displacement of the piezoelectric/electrostrictive actuator is predicted by the frequency response characteristics. The piezoelectric/electrostrictive actuator is precisely inspected without dissolution and destruction and without actual driving as a product.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: September 16, 2008
    Assignee: NGK Insulators, Ltd.
    Inventors: Tomohiro Yamada, Masato Komazawa, Tetsuya Hatta, Takatoshi Nehagi
  • Publication number: 20080201051
    Abstract: A driving force control device includes an individual-wheel friction-circle limit-value calculating portion that calculates friction-circle limit-values of individual wheels, an individual-wheel requested-resultant-tire-force calculating portion that calculates requested resultant tire forces of the individual wheels, an individual-wheel resultant-tire-force calculating portion that calculates resultant tire forces of the individual wheels, an individual-wheel requested-excessive-tire-force calculating portion that calculates requested excessive tire forces of the individual wheels, an individual-wheel excessive-tire-force calculating portion that calculates excessive tire forces of the individual wheels, an excessive-tire-force calculating portion that calculates an excessive tire force, an over-torque calculating portion that calculates an over-torque, and a control-amount calculating portion that calculates a control amount that is output to an engine control unit.
    Type: Application
    Filed: January 24, 2008
    Publication date: August 21, 2008
    Inventors: Takeshi Yoneda, Keisuke Hosokawa, Koichi Inoue, Hirowatari Yosuke, Tomohiro Yamada, Koji Matsuno, Masaru Kogure, Satoru Akiyama, Masato Igarashi, Yosuke Morokuma
  • Patent number: 7399445
    Abstract: A sensor device is formed from a metal film having a plurality of openings, a sensor material positioned within each of the openings, a light source that emits light having a first wavelength, and a light detector that detects light emitted from the light source and transmitted through or reflected from the openings. The plurality of openings are arranged periodically in a first direction in the metal film, and both a size of each of the plurality of openings and an interval thereof in the first direction are equal to or less than the wavelength of the light.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: July 15, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryo Kuroda, Natsuhiko Mizutani, Takako Yamaguchi, Yasuhisa Inao, Tomohiro Yamada
  • Publication number: 20080130003
    Abstract: In a chemical sensing apparatus utilizing a surface plasmon resonance in a small aperture formed in a metal thin film or on a surface of a metal fine particle, a capturing substance is disposed in the small aperture or on the surface of the metal fine particle for capturing a target substance. A marker substance, having a size comparable to that of the small aperture or the metal fine particle is combined with the target substance. As a result, a spectral change is increased in the transmitted light or the scattered light, induced by a surface plasmon resonance and resulting from the capture of the target substance.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 5, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: RYO KURODA, Tomohiro Yamada, Masaya Ogino
  • Publication number: 20080111453
    Abstract: A lower electrode 4 and an auxiliary electrode 8, a piezoelectric/electrostrictive film 5, and an upper electrode 6 are sequentially arranged in layers on a substrate 1. The lower electrode 4 is continuously formed in a region ranging from a first portion of the thick-walled portion 2 to a thin-walled diaphragm portion 3. The auxiliary electrode 8 is continuously formed in a region ranging from a second portion of the thick-walled portion 2 opposite the first portion to a position on the thin-walled diaphragm portion 3, the position being separated from the lower electrode 4. The upper electrode 6 is formed in such a manner as to overlie the piezoelectric/electrostrictive film 5 and the auxiliary electrode 8. Furthermore, a connection electrode 20 is provided for electrically connecting the upper electrode 6 and the auxiliary electrode 8. Thus, a plurality of paths are provided for electrically connecting the upper electrode 6 and the auxiliary electrode 8.
    Type: Application
    Filed: December 20, 2007
    Publication date: May 15, 2008
    Applicant: NGK Insulators, Ltd.
    Inventors: Kunihiko YOSHIOKA, Takao Ohnishi, Tomohiro Yamada
  • Publication number: 20080098582
    Abstract: A method for manufacturing a piezoelectric/electrostrictive element includes a step of subjecting the piezoelectric/electrostrictive film to a heat treatment and a polarization treatment after the film is allowed to stand until the value of an electric constant has converged after the heat treatment. The piezoelectric/electrostrictive element manufactured in this method has small stress remaining in the piezoelectric/electrostrictive film, and predetermined performance regarding, for example, a displacement amount, a displacement-generating force, and an electric power efficiency (consumed electric power) as a piezoelectric/electrostrictive element (piezoelectric/electrostrictive film) is never spoiled.
    Type: Application
    Filed: December 21, 2007
    Publication date: May 1, 2008
    Applicant: NGK Insulators, Ltd.
    Inventors: Takao OHNISHI, Takashi Wada, Tomohiro Yamada, Makoto Tani
  • Publication number: 20080048526
    Abstract: An ultrasonic motor piezoelectric actuator element uses a primary longitudinal mode and a secondary bending mode and includes a stacked piezoelectric element in which piezoelectric layers and electrode layers are stacked alternately in such a manner that the electrode layers divide the piezoelectric layers into two approximately equal portions. A piezoelectric inactive region is formed from the surface portion to the center portion in the thickness direction of the stacked piezoelectric element. The migration resistance of the piezoelectric actuator element is improved while suppressing a decrease in displacement so that a short circuit can be prevented and portions generating heat during alternating polarization can be dispersed, whereby reliability is increased. Moreover, the amount of electrode material used can be reduced, whereby cost can be reduced.
    Type: Application
    Filed: August 21, 2007
    Publication date: February 28, 2008
    Applicant: NGK Insulators, Ltd.
    Inventors: Masahiko Namerikawa, Masayuki Uetani, Hideki Shimizu, Tomohiro Yamada, Nobuo Takahashi
  • Patent number: 7335873
    Abstract: A light-condensing method of irradiating light whose electric field vectors show two or more than two different directions onto a member having apertures arranged at least at two positions and forming a light-condensing section having a strong electric field between the apertures arranged at two positions.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: February 26, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiro Yamada, Natsuhiko Mizutani
  • Publication number: 20080030102
    Abstract: A method for inspecting a piezoelectric element includes first-inspection-signal application step of applying to the piezoelectric element a first inspection signal Vp(1) having a first predetermined voltage waveform; first-characteristic-value measurement step of measuring, as a first characteristic value, an electrical characteristic value of the piezoelectric element after application of the first inspection signal; second-inspection-signal application step of applying to the piezoelectric element a second inspection signal Vp(2) having a second predetermined voltage waveform and an electrical power greater than that of the first inspection signal; second-characteristic-value measurement step of measuring, as a second characteristic value, the electrical characteristic value of the piezoelectric element after application of the second inspection signal; and anomaly determination step of determining whether or not the piezoelectric element is anomalous on the basis of a value corresponding to the difference
    Type: Application
    Filed: September 17, 2007
    Publication date: February 7, 2008
    Applicant: NGK Insulators, Ltd.
    Inventors: Takao Ohnishi, Tomohiro Yamada, Takatoshi Nehagi
  • Publication number: 20080034123
    Abstract: A communication terminal includes a CPU (28). The CPU (28) issues to a router (16) a send request for requesting the router (16) to send an ask signal for repetitive responses to a server (14). Then, the ask signal is sent to the server (14) by the router (16), and a receive port is temporarily opened. From the server (14), a response signal is repeatedly sent in response to the ask signal. To the response signal, time information representative of a waiting time from receiving an ask signal to its reply is attached. A response signal sent back while the receive port is opened arrives at the communication terminal through the router (16), but a response signal sent back after the receive port is closed is discarded in the router (16). The CPU (28) repeatedly issues a send request to the router (16) regarding a time indicated by time information attached to the response signal lastly received as an issuance cycle (T).
    Type: Application
    Filed: September 1, 2005
    Publication date: February 7, 2008
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Keiji Hirao, Motoe Sakanaka, Tomohiro Yamada
  • Patent number: 7297933
    Abstract: A probe which generates near-field light from an aperture at the tip is provided. The tip is covered with a lightproof member, at least the interior of the lightproof member is in the shape of a cone having a plane-shaped top, and the aperture is provided in the top plane.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: November 20, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiro Yamada, Natsuhiko Mizutani
  • Patent number: 7280578
    Abstract: A near-field light source device including a semiconductor laser comprised of laminated semiconductor layers and having a ring-type optical resonator with a plurality of wave guides connected via mirror portions, a light blocking film formed in one of the mirror portions and having a small opening not greater than a wavelength size, and a diffraction grating formed on the light blocking film. The light oscillated from the semiconductor laser is diffracted by the diffraction grating, the diffracted light is coupled to a rotation mode in the ring-type optical resonator, and near-field light is generated via the small opening.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: October 9, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Natsuhiko Mizutani, Tomohiro Yamada
  • Patent number: 7279253
    Abstract: A near-field exposure mask includes a mask base material and a light blocking layer formed on the base material, the light blocking layer includes a fine metal structure or fine opening formed in the light blocking layer. The size of the metal structure or the size of the opening is not more than a wavelength of light for exposure, and at least one of a cross section of the fine metal structure in a direction perpendicular to a surface of the mask, and a cross section of the fine opening in a direction perpendicular to the mask surface has an asymmetrical sectional shape with respect to an arbitrary axis perpendicular to the mask surface.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: October 9, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiro Yamada, Ryo Kuroda, Natsuhiko Mizutani
  • Publication number: 20070206194
    Abstract: Even when only a few antigens exist in a specimen, a change in a dielectric constant and a change in an optical spectrum accompanied thereto in the periphery of a conductive member are made larger, so that sensing at high sensitivity can be performed. A structure including a protrusion including a dielectric material protruded on a substrate and a conductive member provided on a first surface of the protrusion, in which the maximum value of the cross-sectional area in the cross-section in parallel with a first surface of the conductive member is larger than the area of the first surface.
    Type: Application
    Filed: February 22, 2007
    Publication date: September 6, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tomohiro Yamada, Yoichiro Handa
  • Patent number: D579024
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: October 21, 2008
    Assignee: Sony Corporation
    Inventors: Kunihito Sawai, Tomohiro Yamada, Wataru Kokubo, Nobuhiko Ooguchi
  • Patent number: D579951
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: November 4, 2008
    Assignee: Sony Corporation
    Inventors: Kunihito Sawai, Tomohiro Yamada, Wataru Kokubo, Nobuhiko Ooguchi