Patents by Inventor Keiichi Yamamoto

Keiichi Yamamoto 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: 20100101848
    Abstract: A substrate unit includes an electronic component having a plurality of electrodes arranged in a given shape, a circuit substrate having a first face where the electronic component is mounted and the electrodes are jointed and a second face underside of the first face, and a resin-coated portion formed on the second face according to a projected area of the second face to which the given shape is projected.
    Type: Application
    Filed: July 8, 2009
    Publication date: April 29, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Yoshinobu Maeno, Keiichi Yamamoto, Masakazu Takesue
  • Publication number: 20100090555
    Abstract: An axial gap type motor 10 includes: a rotor 11 having a rotor core 13, the rotor core 13 including: multiple main magnet pieces 41 respectively magnetized in a direction of the rotation axis O of the rotor, and multiple main magnet piece storing hole portions 15 respectively for holding associated main magnet pieces; and a pair of stators 12 to be mounted onto the rotor 11, wherein the rotor core 13 is structured by winding a tape-shaped magnetic plate 14, and includes a first winding layer and a second winding layer; and in portions of the first and second winding layers that are situated in the same phase from the center of rotation of the rotor core 13, the first winding layer includes an outside magnetic flux short preventive portions 62, and the second winding layer includes an outside connecting portions 61.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 15, 2010
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Shigeru TAJIMA, Keiichi YAMAMOTO
  • Patent number: 7679260
    Abstract: An axial gap motor including a rotor and stators, wherein: the rotor is provided with a plurality of primary magnet portions, a plurality of auxiliary magnet portions, and a rotor frame; the rotor frame is provided with a plurality of ribs that extend in the radial direction of the rotor frame, and a shaft portion and a rim portion that are integrally connected with each other via the ribs, and the rotor frame houses the primary magnet portions and the auxiliary magnet portions; the primary magnet portions are provided with primary permanent magnet pieces; the auxiliary magnet portions are provided with auxiliary permanent magnet pieces; and each of cross-sectional areas of the ribs which is perpendicular to the radial direction increases from the rim portion side towards the shaft portion side in the radial direction.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: March 16, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Keiichi Yamamoto, Hirofumi Atarashi, Shoei Abe, Shigeru Tajima
  • Patent number: 7649381
    Abstract: A level conversion circuit capable of realizing low-power/high-speed operation and suppression of variations in input/output characteristics due to variations in source voltage and temperature and device variation. The level conversion circuit comprises: a source follower circuit including a first transistor to input an AC signal of CML level thereto and a second transistor to input a control voltage thereto; and a control-voltage generating circuit to generate the control voltage to be inputted to the second transistor. The control-voltage generating circuit comprises: a replica source follower circuit which is a replica of the source follower circuit including a third transistor to input a central voltage of CML level thereto and a fourth transistor to input the control voltage thereto; and a comparator which controls the control voltage, thereby equalizing an output voltage of the replica source follower and a threshold voltage of a CMOS circuit.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: January 19, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Hiroki Yamashita, Fumio Yuuki, Ryo Nemoto, Hisaaki Kanai, Keiichi Yamamoto
  • Publication number: 20090295245
    Abstract: An axial gap motor includes a rotor and a stator, and the rotor includes within a rotor frame a plurality of main magnet pieces which are disposed in a circumferential direction in such a manner that their magnetized direction is in a rotational axis direction and magnetic members which are disposed on surfaces of at least one sides in the rotational axis direction of the main magnet pieces. The magnetic member has a fitting portion on one end face in a radial direction of the rotor thereof which is adapted to fit in the rotor frame.
    Type: Application
    Filed: June 1, 2009
    Publication date: December 3, 2009
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Shoei Abe, Manabu Sakurada, Keiichi Yamamoto
  • Publication number: 20090262124
    Abstract: In one embodiment of the present invention, LUTs (T3) through (T5) are stored in a table memory. When an overshoot calculation section switches over from the LUT (T4), which is being used, to the LUT (T5), the overshoot calculation section obtains the LUT (T5) not out of an external memory but out of the table memory. At this time, in order that the overshoot calculation section can switch over quickly from the LUT (T5) to an LUT (T6) at the next time, a table managing section deletes, from the internal memory, the LUT (T3) to which the LUT (T5) does not switch over directly, meanwhile the table managing section obtains the LUT from the external memory so as to store the LUT (T6) in the table memory. With the arrangement, it becomes possible for a drive circuit to (i) operate at the same processing speed as a drive circuit in which all tables are stored in the internal memory, and simultaneously, (ii) reduce the amount of memory.
    Type: Application
    Filed: June 14, 2007
    Publication date: October 22, 2009
    Inventors: Keiichi Yamamoto, Asahi Yamato, Kohji Saitoh, Akizumi Fujioka, Toshihiro Yanagi
  • Publication number: 20090259654
    Abstract: An information processing apparatus includes: a read unit adapted to read first content information in which a characteristic of first content is written; an extraction unit adapted to extract rule information in which a characteristic that is common among one or more items of second content is written by analyzing second content information in which characteristics of the second content are written; and an update unit adapted to update the first content information based on the first content information and the rule information.
    Type: Application
    Filed: March 23, 2009
    Publication date: October 15, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Keiichi Yamamoto
  • Publication number: 20090251021
    Abstract: A rotor (11) is provided with: a main permanent magnet mounting layer (21) having a plurality of main permanent magnets (21a) mounted thereon; a first sub permanent magnet mounting layer (22) having a plurality of first sub permanent magnets (22a) mounted thereon; a second sub permanent magnet mounting layer (23) having a plurality of second sub permanent magnets (23a) mounted thereon; and a phase change mechanism capable, by turning at least either one of the first sub permanent magnet mounting layer (22) and the second permanent magnet mounting layer (23), and the main permanent magnet mounting layer (21) about the rotational axis, of changing the relative phase between the first sub permanent magnet mounting layer (22) and the second permanent magnet mounting layer (23), and the main permanent magnet mounting layer (21).
    Type: Application
    Filed: March 23, 2007
    Publication date: October 8, 2009
    Inventors: Hirofumi Atarashi, Keiichi Yamamoto, Shoei Abe, Shigeru Tajima
  • Publication number: 20090244314
    Abstract: An image processing apparatus is provided including an acquiring unit configured to acquire information regarding a set of frames that is associated with a condition indicating a relative relationship between a set of images to be arranged in the set of frames, an extracting unit configured to extract the set of images from a plurality of images, wherein the set of images extracted satisfies the condition that is associated with the information regarding the set of frames acquired by the acquiring unit, and an arranging unit configured to arrange the set of images extracted by the extracting unit in the set of frames corresponding to the information acquired by the acquiring unit.
    Type: Application
    Filed: March 26, 2009
    Publication date: October 1, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Keiichi Yamamoto
  • Publication number: 20090243422
    Abstract: The axial gap type motor according to the present invention is provided with: a rotor and a first stator and a second stator, wherein the first and second stators includes an annular back yoke and a plurality of teeth which is provided on the annular back yoke at predetermined intervals in a peripheral direction so as to protrude toward the rotor in the direction of the rotation axis; the peripheral pitch of the plurality of teeth of the first and second stators are equal to each other; and in a case where the first stator and the second stator which sandwich the rotor therebetween in the direction of the rotation axis are seen from one side in the direction of the rotation axis, facing surfaces of the teeth of the first and second stators which face to the rotor are formed so as not to overlap completely each other.
    Type: Application
    Filed: October 2, 2008
    Publication date: October 1, 2009
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Hirofumi Atarashi, Shoei Abe, Keiichi Yamamoto
  • Publication number: 20090207163
    Abstract: In one embodiment of the present application, a memory stores a lookup table storing, in accordance with a combination of a value of a video signal of a current frame and a value of a video signal of a previous frame, each of correction values, the correction values in each of which a temporal change of a video signal is enhanced. A correcting circuit carries out, with respect to a correction value selected from the lookup table, a predetermined correcting operation in accordance with a polarity of a voltage to be applied to each of data signal lines S1 through Sm, with the use of a correction coefficient which is set based on properties of liquid crystal. Thus found is a corrected video signal in accordance with a positive or negative polarity. This makes it possible to find, with less memory capacity, an optimum corrected video signal in accordance with a polarity of a voltage to be applied to a data signal line.
    Type: Application
    Filed: June 6, 2007
    Publication date: August 20, 2009
    Inventors: Asahi Yamato, Kohji Saitoh, Akizumi Fujioka, Keiichi Yamamoto, Toshihiro Yanagi
  • Publication number: 20090179666
    Abstract: An output buffer circuit, a differential output buffer circuit, an output buffer circuit having a regulation circuit and a regulation function, and a transmission method, capable of improving resolution of a pre-emphasis amount without increasing power consumption or a circuit area, in which the output buffer circuit 10 has a function which includes a delay circuit 23, an inverter 22 and output buffers 3 to 7 to transmit a logical signal to a transmission line 2 and generate a waveform having four or more types of signal voltages on a transmission side according to a signal attenuation amount of the transmission line 2 and the output buffer 3 has a variable resistance portion 12 at an on-resistance to change a pre-emphasis amount according to a change in a variable resistance value. The output buffer 3 has a selector 20 on a forward stage and a variable resistance portion 12 at an on-resistance.
    Type: Application
    Filed: December 24, 2008
    Publication date: July 16, 2009
    Inventors: Norio Chujo, Keiichi Yamamoto, Hisaaki Kanai, Toru Yazaki
  • Publication number: 20090175010
    Abstract: A repair system which prevents heating of weakly heat resistant devices together and causing deterioration of the quality when preheating a first surface of the circuit board, wherein an electromagnetic induction material is buried in advance inside the circuit board near a specific electronic device envisioned as needed repair when becoming a defective electronic device in a production process and an electromagnetic coil emitting electromagnetic waves to an electromagnetic induction member in the vicinity of the repair device is provided and the heat generated by the electromagnetic induction member due to the electromagnetic waves enables the repair device to be heated and detached from the circuit board.
    Type: Application
    Filed: October 9, 2008
    Publication date: July 9, 2009
    Applicant: Fujitsu Limited
    Inventors: Shigeo Iriguchi, Kiyoyuki Hatanaka, Satoshi Watanabe, Nobuo Taketomi, Keiichi Yamamoto, Masaru Sugie
  • Publication number: 20090177359
    Abstract: A collision damage reducing apparatus for lessening vehicle collision damage, includes: designated obstacle detecting means detecting an object having a collision possibility to be a obstacle; calculating means obtaining a continuous detecting period, for which the object is detected as the obstacle; monitoring target acknowledging means, according to the continuous detecting period, deciding whether or not the obstacle is regarded as a monitoring target, and deciding whether or not the obstacle is regarded as an activation cause; reliability determining means judging a collision possibility if the continuous detecting period is longer than a threshold value, and defining a reliability level coefficient indicating obstacle's reliability if a result of the judging of the collision possibility is positive; attentiveness determining means defining attentiveness coefficient decreased according to attentiveness deterioration; and detecting period threshold value adjusting means decreasing the threshold value accor
    Type: Application
    Filed: December 16, 2008
    Publication date: July 9, 2009
    Inventors: Toru Ihara, Keiichi Yamamoto
  • Publication number: 20090125237
    Abstract: A monitoring target detecting apparatus, which is associated with a collision damage reducing apparatus, includes designated obstacle detecting means, which is equipped with the vehicle, detecting an object being positioned in the moving direction and having a possibility of a collision with the vehicle to be a designated obstacle; detecting period calculating means obtaining a continuous detecting period, for which the object has been uninterruptedly detected as the designated obstacle; and monitoring target acknowledging means, according to the continuous detecting period obtained by the detecting period calculating means, deciding whether or not the designated obstacle is regarded as a monitoring target that is to be monitored by the damage reducing apparatus, and deciding whether or not the designated obstacle is regarded as an activation cause to activate the equipment activated under control by the damage reducing apparatus.
    Type: Application
    Filed: October 29, 2008
    Publication date: May 14, 2009
    Inventors: Tetsuya Kitagawa, Keiichi Yamamoto, Toru Ihara
  • Patent number: 7520603
    Abstract: In an inkjet printer including first to n-th paper storages, such as a magazine type storage or a cassette type storage, and associated first to n-th upstream transport lines (where n is a natural number larger than 1), a paper carrier (switchback unit) is provided which has a roller pair reciprocable between any of first to n-th receive points corresponding to the downstream ends of the first to n-th upstream transport lines, respectively, and a forwarding point corresponding to the upstream end of a downstream transport line by means of a moving mechanism. The paper carrier is configured so that the roller pair receives and grips, at one of the first to n-th receive points, a sheet of printing paper transported from the associated upstream transport line, the moving mechanism moves the roller pair from the receive point to the forwarding point and the gripped sheet of printing paper is forwarded at the forwarding point to the downstream transport line.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: April 21, 2009
    Assignee: Noritsu Koki Co., Ltd.
    Inventors: Masaaki Tsuji, Hiroomi Kondou, Noboru Michiue, Keiichi Yamamoto, Yasuto Nakai, Mitsuru Yasuda
  • Publication number: 20090085688
    Abstract: In a semiconductor circuit, an impedance adjustment circuit having the characteristics same as those of a circuit having the nonlinear resistance characteristics is configured to include an operating point calculation circuit automatically calculating an operating point with a reference resistance through feedback control, and an impedance calculation circuit calculating the impedance at the operating point found by the operating point calculation circuit. The impedance adjustment circuit is also provided with an impedance determination circuit that determines whether or not the impedance found by the impedance calculation circuit is in a predetermined range. These components, i.e., the operating point calculation circuit, the impedance calculation circuit, and the impedance determination circuit, are provided each two for High-side and Low-side impedance adjustment use.
    Type: Application
    Filed: June 25, 2008
    Publication date: April 2, 2009
    Inventors: Keiichi YAMAMOTO, Norio Chujo, Toru Yazaki, Hisaaki Kanai
  • Patent number: 7499569
    Abstract: A camera for taking an image of movement of a hand, and a hand pattern switching apparatus which operates an object equipment based on the result of the image taken by the camera, having a storage unit for saving the image taken in the state that a hand does not exist in the image pickup area of the camera, as an initial image data, a differentiation unit for obtaining a difference image data between an original image data that is the image taken in the state that a hand exists in the image pickup area of the camera, and the initial image data, a luminance detection unit for obtaining an average luminance in a place close to a hand based on the image data of a place close to a hand obtained by the differentiation unit, and a processing unit for performing binary processing of the original image data by a threshold value based on the average luminance calculated by the luminance detection unit.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: March 3, 2009
    Assignees: Mitsubishi Fuso Truck and Bus Corporation, Keio University
    Inventors: Hiromitsu Sato, Keiichi Yamamoto, Shinji Ozawa, Hideo Saito, Hiroya Igarashi
  • Publication number: 20090045245
    Abstract: A solder repairing apparatus includes a stage designed to place the surface of at least a specific part of an object along a reference plane within a specific spot defined on the stage. A heating unit applies a thermal energy to the specific spot. A dividing plate is designed to move into the specific spot in a vertical attitude perpendicular to the reference plane. The dividing plate exhibits a low solder wettability. The solder melts in response to the application of the thermal energy. When the dividing plate in the vertical attitude enters the specific spot, the dividing plate gets into the solder. Since the dividing plate exhibits a low solder wettability, the dividing plate repels the solder. The solder is divided into two parts. The division of the solder reliably eliminates a short circuit in the electronic circuit.
    Type: Application
    Filed: July 14, 2008
    Publication date: February 19, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Keiichi Yamamoto, Toru Okada
  • Publication number: 20090033431
    Abstract: The present invention provides a highly accurate oscillation circuit. For example, the oscillation circuit includes plural ring oscillator units RO1 and RO2 including inverter circuits IV of an odd number of stages, and an adding unit ADD that adds signals of output nodes RO—01 and RO—02 of the RO1 and RO2. It outputs an addition result of the ADD from an output node OSC_O as a clock signal, and feeds the output node OSC_O back to input nodes RO_I1 and RO_I2 of the RO1 and RO2. Thereby, for example, when each of delay times of the RO1 and RO2 disperses based on a normal distribution of standard deviation ?, the dispersion of a clock signal obtained from the OSC_O can be confined to ?/?{square root over (2)}.
    Type: Application
    Filed: July 30, 2008
    Publication date: February 5, 2009
    Inventors: Hiroki Yamashita, Koji Fukuda, Ryo Nemoto, Hisaaki Kanai, Keiichi Yamamoto