Patents by Inventor Tsutomu Ikeda

Tsutomu Ikeda 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: 7691248
    Abstract: A system (apparatus and process) for producing an electrophoretic (display) device is provided for allowing production of such a device wherein electrophoretic particles in the dispersion liquid are easily and evenly distributed to respective cells (pixels) between two substrates of the device even in the case of a very small gap between the two substrates or the case of using a flexible substrate. The system includes a storage unit for a dispersion liquid containing the charged phoretic particles dispersed therein, a stiffer for stirring the dispersion liquid, a substrate-holder for holding the substrate in the dispersion liquid, and a voltage source for applying a voltage to the electrodes formed on the substrate thereby depositing the electrophoretic particles on the electrodes.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: April 6, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Ikeda, Nobutaka Ukigaya
  • Publication number: 20100060217
    Abstract: For starting a three-phase four-pole sensorless brushless motor including a stator having three-phase coils and a four-pole magnet rotor provided in correspondence with the stator, it is arranged to energize any two-phase coils of the three-phase coils in a predetermined energizing sequence; monitor magnetic flux generated in the other one-phase coil; and switch the two-phase coils according to a specific case where the monitored magnetic flux changes to a positive or negative side and in mid-course further changes to an opposite side. For instance, when the specific case is a case where the magnetic flux monitored by first energization changes to the negative side and in mid-course further changes to the positive side, the first energization is immediately stopped and switched to fourth energization by skipping two energizations in the predetermined energizing sequence.
    Type: Application
    Filed: August 10, 2009
    Publication date: March 11, 2010
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Tsutomu Ikeda, Takumi Kamiya
  • Patent number: 7663799
    Abstract: A movable particle display (such as an electrophoretic display) in which a plurality of closed spaces are two-dimensionally disposed along a surface of the substrate, a plurality of particles contained in each of the closed spaces, and a reflection surface for reflecting light which enters each of the closed particles are moved inside a closed space, between a position at which they cover a reflecting surface and a position at which they are collected to expose the reflecting surface. At least a part of the reflecting surface diffusely reflects incident light with an intensity distribution having directional properties (i.e. non-isotropically).
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: February 16, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Matsuda, Taro Endo, Kohei Nagayama, Tsutomu Ikeda, Etsuro Kishi
  • Publication number: 20080297081
    Abstract: In a brushless motor driving apparatus, a drive circuit arranged to rotate a magnet rotor by sequentially switching energization of coils of phases, detect a position of the magnet rotor based on back electromotive force voltage generated in each phase coil, and control the energization of each phase coil based on the detected position. The drive circuit is configured to energize each phase under duty control and, before the back electromotive force control, perform initial setting twice sequentially for sweeping energization duty with respect to each phase coil to set the magnet rotor in a predetermined initial position.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 4, 2008
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Toru Morita, Tsutomu Ikeda, Yasushi Shinojima, Yasutoshi Sugiura
  • Patent number: 7411721
    Abstract: A particle-movement display device includes a front-side first substrate and a rear-side second substrate disposed opposite to each other with a spacing therebetween, a partition wall, disposed between the first and second substrates, for partitioning the spacing into a plurality of sections, and charged particles disposed in each of the sections. A first electrode is disposed on a surface of the first substrate in each section, and a second electrode is disposed on a surface of the second substrate in each section. The first electrode in each section has a lattice-like shape, a pitch of which is smaller than a pitch of the partition wall.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: August 12, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tsutomu Ikeda
  • Patent number: 7389765
    Abstract: An electrically controlled throttle apparatus comprises a throttle valve for controlling an amount of intake air to be supplied to an internal combustion engine; a throttle body which houses the throttle valve; a motor for driving the throttle valve; and a throttle sensor for detecting an opening degree of the throttle valve. The throttle sensor is a magnetic resistance element for detecting a change in direction of a magnetic field. The direction of the measured magnetic field of the throttle sensor when the throttle valve is in an opening learning reference position used as a criterion by the throttle sensor is the same as a direction of a leakage magnetic field of from the motor.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: June 24, 2008
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventor: Tsutomu Ikeda
  • Publication number: 20080121831
    Abstract: The present invention includes a rotational angle sensor having a magnetic detection device. The magnetic detection device includes a sensing section that can detect a change of a magnetic field produced by at least two magnets attached to a rotary member. A housing member is molded integrally with the magnetic detection device and a support member. The support member may serves as a protective member for protecting at least the sensing section of the magnetic detection device or may serve as a positioning member configured to enable at least the sensing section to be positioned relative to the positioning member.
    Type: Application
    Filed: November 5, 2007
    Publication date: May 29, 2008
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Tsutomu IKEDA
  • Publication number: 20080036730
    Abstract: A particle movement-type display apparatus is constituted by a pixel portion, a peripheral area around the pixel portion, and particles. At least a part of the peripheral area around the pixel portion is provided with a recess portion capable of accommodating a part of the particles therein.
    Type: Application
    Filed: June 3, 2005
    Publication date: February 14, 2008
    Inventors: Tsutomu Ikeda, Takehiko Soda
  • Publication number: 20080029060
    Abstract: A throttle body (2) includes a resin main body (3) defining a bore (7) through which intake air flows, a valve body (60) having a shaft part (20) rotatably supported by the resin body (3) and a valve part (4) for opening and closing the bore (7) of the main body (3), and a resin cover body (40) attached to the main body (3). The cover body (4) is attached to the main body (3) by welding.
    Type: Application
    Filed: May 31, 2005
    Publication date: February 7, 2008
    Inventors: Tsutomu Ikeda, Hideki Asano, Mamoru Tateishi, Toshiyuki Masui, Koichi Suzuki, Takashi Tsuge, Tuneaki Aoki, Mikiharu Yoshizaka, Masashi Ozeki
  • Publication number: 20080012555
    Abstract: A rotational angle detecting device has a pair of permanent magnets and an angle sensor. Electrical connecting terminals are connected to the angle sensor and further connected to conductors. The conductors have seconds ends opposite to the first ends and serving as connector terminals of the connector. In one embodiment, the rotational angle detecting device includes a first resin-molded portion and a second resin-molded portion. The first resin-molded portion includes at least the electrical connecting terminals, a part of the angle sensor and the first ends of the conductors embedded within a first resin. The second resin-molded portion includes portions of the conductors embedded within a second resin. In another embodiment, capacitors are connected to the connector conductors. The angle sensor has a magnetic detecting element positioned substantially perpendicularly to the rotational axis of the rotary section.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 17, 2008
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Tsutomu Ikeda
  • Publication number: 20070272206
    Abstract: An electrically controlled throttle apparatus comprises a throttle valve for controlling an amount of intake air to be supplied to an internal combustion engine; a throttle body which houses the throttle valve; a motor for driving the throttle valve; and a throttle sensor for detecting an opening degree of the throttle valve. The throttle sensor is a magnetic resistance element for detecting a change in direction of a magnetic field. The direction of the measured magnetic field of the throttle sensor when the throttle valve is in an opening learning reference position used as a criterion by the throttle sensor is the same as a direction of a leakage magnetic field of from the motor.
    Type: Application
    Filed: April 11, 2007
    Publication date: November 29, 2007
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Tsutomu Ikeda
  • Publication number: 20070247143
    Abstract: A rotational angle sensor and a method for manufacturing the same, and a throttle control device with a rotational angle sensor, which may lower the cost, are provided. The rotational angle sensor includes each sensor IC 50(1), 50(2) for detecting a rotational angle of a rotor based on a magnetic field generated between a pair of magnets respectively disposed across the rotational axis of the rotor; each main terminal 61, 62, 63, 64 connected with each connection terminal 55, 56, 57 of each sensor IC 50(1), 50(2); and a holder member 90 for holding each sensor IC 50(1), 50(2) and connection portions of each main terminal 61, 62, 63, 64 on each sensor IC 50(1), 50(2) side. A sensor assembly 100 is constructed to form the sensor ICs 50(1), 50(2), the main terminals 61, 62, 63, 64 and the holder member 90 into an assembly. A potting material 102 is potted into the holder member 90.
    Type: Application
    Filed: January 28, 2005
    Publication date: October 25, 2007
    Inventors: Tsutomu Ikeda, Yoshihiro Sakuma, Masaharu Nagasaka, Koji Yoshikawa, Kazumasa Nakashima
  • Publication number: 20070236777
    Abstract: A particle-movement display device includes a front-side first substrate and a rear-side second substrate disposed opposite to each other with a spacing therebetween, a partition wall, disposed between the first and second substrates, for partitioning the spacing into a plurality of sections, and charged particles disposed in each of the sections. A first electrode is disposed on a surface of the first substrate in each section, and a second electrode is disposed on a surface of the second substrate in each section. The first electrode in each section has a lattice-like shape, a pitch of which is smaller than a pitch of the partition wall.
    Type: Application
    Filed: June 15, 2007
    Publication date: October 11, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tsutomu Ikeda
  • Patent number: 7277219
    Abstract: A particle movement type display device includes a plurality of pixels each of which is constituted by a first substrate and a second substrate disposed opposite to each other with a spacing therebetween, charged particles disposed between the first substrate and the second substrate, a first electrode and a second electrode disposed in contact with the spacing. An image is displayed by moving the charged particles under application of an electric field between the first electrode and the second electrode. The first electrode is formed on the first substrate at a part of a portion corresponding to each pixel, and a non-electrode forming portion at which the first electrode is not formed is provided on the first substrate.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: October 2, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tsutomu Ikeda
  • Publication number: 20070225955
    Abstract: The present invention displays a map, let a user to input a starting point and an ending point in a bank breakage section on the map, and shows a broken place on the map with a line connecting the starting point and the ending point. Further, the present invention calculates the direction of the flow quantity in bank breakage by calculating the normal line to the side of the inside area of the bank at the input broken place and make the it discrete in the calculation grids of the inundation simulation.
    Type: Application
    Filed: March 22, 2007
    Publication date: September 27, 2007
    Inventors: Satoshi Yamaguchi, Kazuaki Iwamura, Tsutomu Ikeda
  • Patent number: 7216625
    Abstract: A sensor for a throttle control device. The throttle control device includes a throttle body. A throttle valve is disposed within an intake air channel defined within the throttle body. A speed or gear reduction mechanism is coupled between a motor and the throttle valve. A sensor detects the rotational position, i.e., the rotational angle, of the motor and has a movable section and a fixed sensing section. The movable section is attached to a rotary shaft of the motor, so that the movable section rotates as the rotary shaft rotates. The fixed sensing section is mounted to the throttle body and is disposed within the movable section. By detecting the rotation of the motor a computing section can accurately determine the degree of opening of the throttle valve. The sensor outputs the degree of opening of the throttle valve.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: May 15, 2007
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Tsutomu Ikeda, Koji Yoshikawa, Sunao Kitamura
  • Patent number: 7210451
    Abstract: A throttle control device includes a motor coupled to the throttle shaft, so that the throttle valve rotates to open and close an intake air channel as the motor is driven. A detection device serves to detect the degree of opening of the throttle valve and includes a pair of magnets and a sensor. The magnets are mounted to the throttle shaft via a magnet support and are positioned to oppose each other across the rotational axis of the throttle shaft in order to produce a uniform magnetic field. The sensor is mounted to the throttle body and serves to detect a direction of the magnetic field produced by the magnets, so that the detection device outputs a signal representing the degree of opening of the throttle valve.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: May 1, 2007
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Tsutomu Ikeda, Koji Yoshikawa, Kazumasa Nakashima
  • Publication number: 20060177921
    Abstract: The present invention provides a method for removing unsaturated uronic acid contained in chemical pulp for papermaking, characterized by adding glucuronidase. According to the preferred embodiment of the present invention, in an ECF or TCF bleaching method using no molecular chlorine, unsaturated uronic acid can be reduced while controlling a bleaching cost, and a brightness reversion property of pulp can be improved.
    Type: Application
    Filed: February 6, 2006
    Publication date: August 10, 2006
    Inventors: Hiroshi Ohi, Shigeki Yoshida, Yuko Aoki, Yasuyuki Kawabata, Tomoya Yokoyama, Tsutomu Ikeda
  • Publication number: 20060124106
    Abstract: A sensor for a throttle control device. The throttle control device includes a throttle body. A throttle valve is disposed within an intake air channel defined within the throttle body. A speed or gear reduction mechanism is coupled between a motor and the throttle valve. A sensor detects the rotational position, i.e., the rotational angle, of the motor and has a movable section and a fixed sensing section. The movable section is attached to a rotary shaft of the motor, so that the movable section rotates as the rotary shaft rotates. The fixed sensing section is mounted to the throttle body and is disposed within the movable section. By detecting the rotation of the motor a computing section can accurately determine the degree of opening of the throttle valve. The sensor outputs the degree of opening of the throttle valve.
    Type: Application
    Filed: February 6, 2006
    Publication date: June 15, 2006
    Inventors: Tsutomu Ikeda, Koji Yoshikawa, Sunao Kitamura
  • Publication number: 20060125776
    Abstract: There is a demand for preventing display quality of a display apparatus from deteriorating. When charged particles (9) are attracted to a first electrode (3), the distribution density may not become uniform over the entire area A1 and only the distribution density in the periphery of the first electrode (3) (see reference numeral A3) may be locally reduced. The present invention places a colored layer (5) having the same color as the color of charged particles in this area A3. Therefore, even if the distribution density is low, the low density is hardly visually recognized, making it possible to prevent the display quality from deteriorating.
    Type: Application
    Filed: April 21, 2004
    Publication date: June 15, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Takeshi Togano, Tsutomu Ikeda, Nobutaka Ukigaya