Patents by Inventor Masakazu Saito

Masakazu Saito 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: 20130311028
    Abstract: To provide a driving source control for a hybrid motor vehicle capable of comfortably driving a motor generator by activating an internal combustion engine only at minimum necessary timings at a time of moving backward. It is a driving source control device 1 for a hybrid motor vehicle that moves by mounting an engine 2 and motor generators 4 and 5, in which a driving control unit 32 reduces a target rotational speed of the first motor generator 4, when a shift position detection unit 47 has acquired a backward moving command and a battery state of charge detection unit 36 has detected that a remaining charge amount SOC of a battery 21 is less than or equal to a setting value, at a time of an activation stopping state of the engine 2.
    Type: Application
    Filed: February 9, 2011
    Publication date: November 21, 2013
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Hitoshi Ohkuma, Yoshiki Ito, Masakazu Saito, Masaaki Tagawa, Yukihiro Hosoe
  • Publication number: 20130311024
    Abstract: An engine, a first motor generator and a second motor generator are controlled by calculating an engine power target from a driving power target required for a vehicle, and finding a target engine operating point expressed by a set of an engine speed target and an engine torque target on a target operating line determined in response to the engine power target. When the found target engine operating point is different from the previously found one, a change in engine speed target is limited to a predetermined amount of change and the engine torque target of the set is reset versus an engine speed target involving the limited change based on the determined target operating line. Consequently, the engine power target and thus the driving power target are ensured so as to restrain or prevent sudden or frequent changes in engine speed with the efficiency kept high.
    Type: Application
    Filed: February 3, 2011
    Publication date: November 21, 2013
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Masaaki Tagawa, Yoshiki Ito, Masakazu Saito, Hitoshi Ohkuma, Yukihiro Hosoe
  • Publication number: 20130307329
    Abstract: An arrangement which prevents excessive engine speed, satisfies a driver's requested torque and protects a battery from overvoltage. A control apparatus provides a torque control to a hybrid electric vehicle, and calculates an engine speed final target so that an engine speed temporary target does not exceed an upper limit. In addition, the control recalculates an engine operating point target based on the calculated engine speed final target, and calculates an engine power final target based on the recalculated engine operating point target. An electrical power target is calculated and may not exceed an upper limit for battery charging and an upper limit for battery discharging. Engine torque is controlled based on the calculated engine operating point target (especially the engine torque final target). Motor generators are controlled to operate based on the calculated engine operating point target and electrical power target.
    Type: Application
    Filed: February 3, 2011
    Publication date: November 21, 2013
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Yoshiki Ito, Masaaki Tagawa, Masakazu Saito, Hitoshi Ohkuma, Yukihiro Hosoe
  • Publication number: 20130304295
    Abstract: A hybrid vehicle, a drive control apparatus, and a drive control method to prevent overcharging a battery, and providing an output drive force depending on a driver's request. The drive control apparatus for hybrid vehicles outputs generated power at an internal combustion engine and a motor generator through a power transmission mechanism to drive axles, and includes an output shaft fixing mechanism which fixes an internal combustion engine output shaft to disable rotation. A request drive force setter sets a request drive force depending on a driver's request. A controller executes a control based on a detected battery stored energy level to operate irrespective of a magnitude of the request drive force to stop the internal combustion engine, uses the shaft fixing mechanism to fix the output shaft, and provides travel using generated power from the motor generator.
    Type: Application
    Filed: January 31, 2011
    Publication date: November 14, 2013
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Masaaki Tagawa, Yoshiki Ito, Masakazu Saito, Hitoshi Ohkuma
  • Publication number: 20130304297
    Abstract: An apparatus that both prevents excessive engine speed and satisfies a driver's requested drive torque. A control apparatus provides torque control to a hybrid electric vehicle and uses a calculated engine speed final target, and engine speed temporary target, which may not exceed an upper limit. In addition the control recalculates an engine operating point target based on the calculated engine speed final target and calculates an engine power final target based on the recalculated engine operating point target. An electrical power target is calculated based on the calculated engine power final target. Engine torque is controlled based on the calculated engine operating point target (especially the engine torque final target). In addition, motor generators are controlled to operate in power running mode or regenerating mode, based on the calculated engine operating point target and electrical power target.
    Type: Application
    Filed: February 3, 2011
    Publication date: November 14, 2013
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Yoshiki Ito, Masaaki Tagawa, Masakazu Saito, Hitoshi Ohkuma, Yukihiro Hosoe
  • Publication number: 20130297134
    Abstract: A regenerative control capable of realizing a comfortable operation, along with an efficient collection of a regenerative energy of a motor generator and an effective regenerative braking control. A regenerative control device for a motor generator generates a regenerative braking power for decelerating a motor vehicle at a time of collecting regenerative energy generated by driving of the motor vehicle. The arrangement includes a driving state detection unit for detecting a driving state and a deceleration level acquisition unit for acquiring a deceleration level. A braking force setting unit sets the regenerative braking force of the motor generator at a time of detection of a deceleration operation by the driving state detection unit. A braking force adjustment unit adjusts and suppresses the regenerative braking force set by the braking force setting unit, according to acquired deceleration level.
    Type: Application
    Filed: January 31, 2011
    Publication date: November 7, 2013
    Applicant: SUZUKI MOTOR CORPORATION
    Inventors: Masakazu Saito, Yoshiki Ito, Masaaki Tagawa, Hitoshi Ohkuma
  • Patent number: 8491442
    Abstract: A hybrid vehicle is taught herein in which a clutch is disposed between an engine and a motor/generator and disengagement of the clutch is controlled in a coasting drive while dragging the engine. A drive controller engages the clutch so that the vehicle coasts while dragging the engine at a time of coasting deceleration. While coasting, when the stepped transmission of the hybrid vehicle downshifts, the clutch is disengaged during the downshift.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: July 23, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masakazu Saito, Munetoshi Ueno
  • Publication number: 20130114136
    Abstract: A phase difference film stacked body having a lengthy shape, including a first phase difference film that has a uniform phase difference within a plane, and a second phase difference film that includes a plurality of regions that are patterned within a plane, the plurality of regions having different phase differences; as well as a polarizing plate complex having the same, a display device, and polarization glasses corresponding thereto.
    Type: Application
    Filed: July 14, 2011
    Publication date: May 9, 2013
    Applicant: ZEON CORPORATION
    Inventors: Masakazu Saito, Manabu Haraguchi, Kentaro Tamura, Hiromasa Hashimoto
  • Patent number: 8414450
    Abstract: A hybrid vehicle in which a clutch is disposed between an engine and a motor/generator is controlled to suppress frequent engagement/disengagement of the clutch in a case of a coasting drive while dragging the engine. A clutch control apparatus controls the clutch and selects any one of the following drive modes: 1) an EV drive mode where the vehicle travels by only driving force of the motor/generator with the clutch disengaged; 2) an HEV drive mode where the vehicle travels by driving force of the engine and/or the motor/generator with the clutch engaged; and 3) an engine brake drive mode in which the vehicle coasts or travels by the driving force of the motor/generator while dragging the engine where the clutch is engaged, and the fuel supply is stopped when a charge of the battery is greater than or equal to a threshold value.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: April 9, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Muetoshi Ueno, Masakazu Saito
  • Publication number: 20110174559
    Abstract: A hybrid vehicle is taught herein in which a clutch is disposed between an engine and a motor/generator and disengagement of the clutch is controlled in a coasting drive while dragging the engine. A drive controller engages the clutch so that the vehicle coasts while dragging the engine at a time of coasting deceleration. While coasting, when the stepped transmission of the hybrid vehicle downshifts, the clutch is disengaged during the downshift.
    Type: Application
    Filed: February 27, 2009
    Publication date: July 21, 2011
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Masakazu Saito, Munetoshi Ueno
  • Publication number: 20110165992
    Abstract: A hybrid vehicle in which a clutch is disposed between an engine and a motor/generator is controlled to suppress frequent engagement/disengagement of the clutch in a case of a coasting drive while dragging the engine. A clutch control apparatus controls the clutch and selects any one of the following drive modes: 1) an EV drive mode where the vehicle travels by only driving force of the motor/generator with the clutch disengaged; 2) an HEV drive mode where the vehicle travels by driving force of the engine and/or the motor/generator with the clutch engaged; and 3) an engine brake drive mode in which the vehicle coasts or travels by the driving force of the motor/generator while dragging the engine where the clutch is engaged, and the fuel supply is stopped when a charge of the battery is greater than or equal to a threshold value.
    Type: Application
    Filed: February 27, 2009
    Publication date: July 7, 2011
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Muetoshi Ueno, Masakazu Saito
  • Patent number: 7655950
    Abstract: The present invention provides a manufacturing method of a high performance active matrix substrate at a high throughput with a less expensive apparatus, and an image display device using the active matrix substrate. On a stage moving in the short axis direction X and long axis direction Y on a rail, a glass substrate is carried, which has an amorphous silicon semiconductor film formed. Polycrystallized and large grain silicon film may be obtained by intensity modulating the pulsed laser beam in a line beam shape by means of a phase shift mask with a periodicity in the long axis direction Y of the laser beam, moving the laser beam randomly in the modulation direction of the amorphous silicon semiconductor film formed on the glass substrate to expose to crystallize the film. The image display device may incorporate an active matrix substrate having active elements such as thin film transistors formed by this silicon film.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: February 2, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takeshi Sato, Kazuo Takeda, Masakazu Saito, Jun Goto, Makoto Ohkura
  • Publication number: 20090269502
    Abstract: Provided are a method for producing a circular polarization separation sheet and an apparatus for coating layer formation, whereby a circular polarization separation sheet which selectively reflects a light in an entire visible light range is easily obtainable. A method for producing a circular polarization separation sheet including a step of obtaining on a substrate a photopolymerizable composition containing a liquid crystal compound, and a step of converting the coating layer into a resin layer having a cholesteric regularity, characterized in that the resin layer forming step includes: a selected ultraviolet light irradiation step (1) of irradiating the coating layer with a selected ultraviolet light having an illumination intensity of less than 10 mW/cm2 under a temperature at 20 to 40° C. for 0.
    Type: Application
    Filed: July 13, 2007
    Publication date: October 29, 2009
    Applicants: ZEON CORPORATION, FUTURE VISION INC.
    Inventors: Hiroshi Kanno, Tsutomu Haneda, Hirokazu Takai, Hiroo Igarashi, Masakazu Saito
  • Patent number: 7528408
    Abstract: To improve the laser annealing process for polycrystallizing amorphous silicon to form silicon thin films having large crystal particle diameters at a high throughput, the present invention is directed to a process of crystallization by irradiation of a semiconductor thin film formed on a substrate with pulsed laser light. The process comprises having a means to shape laser light into a linear beam and a means to periodically and spatially modulate the intensity of pulsed laser in the direction of the long axis of the linear beam by passing through a phase-shifting stripy pattern perpendicular to the long axis, and collectively forming for each shot a polycrystalline film composed of crystals which have grown in a certain direction over the entire region irradiated with the linear beam.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: May 5, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Takeda, Jun Gotou, Masakazu Saito, Makoto Ohkura, Takeshi Satou, Hiroshi Fukuda, Takeo Shiba
  • Patent number: 7413604
    Abstract: The present invention provides a process for producing a polycrystal silicon film which comprises a step of forming a polycrystal silicon film by light irradiation of a silicon film set on a substrate, and a step of selecting substrate samples having an average grain size in a plane of the sample of 500 nm or more. According to the present invention, stable production of a high-performance poly-silicon TFT liquid crystal display becomes possible.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: August 19, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Takeda, Masakazu Saito, Yukio Takasaki, Hironobu Abe, Makoto Ohkura, Yoshinobu Kimura, Takeo Shiba
  • Patent number: 7297982
    Abstract: A display device includes a pixel region having a plurality of pixels and a peripheral circuit region disposed at a periphery of the pixel region for driving the pixels. The peripheral circuit region includes transistors fabricated from polycrystalline semiconductor and having a semiconductor crystalline grain of a first kind in a channel region thereof, wherein a grain size of the semiconductor crystalline grain of the first kind is at least 3 ?m. The pixel region includes transistors fabricated from polycrystalline semiconductor and having a semiconductor crystalline grain of a second kind in a channel region thereof, wherein a grain size of the semiconductor crystalline grain of the second kind is at least 0.05 ?m.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: November 20, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Kenkichi Suzuki, Tetsuya Nagata, Michiko Takahashi, Masakazu Saito, Toshio Ogino, Masanobu Miyano
  • Patent number: 7232716
    Abstract: The average film thickness of an amorphous silicon film formed on a substrate is measured. Then, the amorphous silicon film is irradiated with a laser beam to form a polysilicon film, and the grain size distribution of the polysilicon film is measured. An optimum value of energy density of laser beam irradiation is calculated on the basis of grain size values measured at two points A and B of the polysilicon film. Then, the average film thickness of an amorphous silicon film formed on a subsequent substrate is measured. A value of energy density of laser beam irradiation for the subsequent amorphous silicon film is calculated on the basis of the two average film thicknesses. Accordingly, a uniform polysilicon film of large grain sizes is formed on the whole surface of a large-size substrate to provide polysilicon TFTs in a large area.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: June 19, 2007
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hironaru Yamaguchi, Kiyoshi Ogata, Takuo Tamura, Jun Gotoh, Masakazu Saito, Kazuo Takeda
  • Patent number: 7151046
    Abstract: A surface roughness of a polycrystalline semiconductor film to be formed by a laser annealing method is reduced. A transmittance distribution filter is disposed at the optical system of a laser annealing apparatus. The transmittance distribution filter controls an irradiation light intensity distribution along a scanning direction of a substrate formed with an amorphous silicon semiconductor thin film to have a distribution having an energy part equal to or higher than a fine crystal threshold on a high energy light intensity side and an energy part for melting and combining only a surface layer. This transmittance distribution filter is applied to an excimer laser annealing method, a phase shift stripe method or an SLS method respectively using a general line beam to thereby reduce the height of protrusions on a polycrystalline surface.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: December 19, 2006
    Assignee: Hitachi Displays, Ltd.
    Inventors: Kazuo Takeda, Takeshi Sato, Masakazu Saito, Jun Gotoh
  • Publication number: 20060254497
    Abstract: A surface roughness of a polycrystalline semiconductor film to be formed by a laser annealing method is reduced. A transmittance distribution filter is disposed at the optical system of a laser annealing apparatus. The transmittance distribution filter controls an irradiation light intensity distribution along a scanning direction of a substrate formed with an amorphous silicon semiconductor thin film to have a distribution having an energy part equal to or higher than a fine crystal threshold on a high energy light intensity side and an energy part for melting and combining only a surface layer. This transmittance distribution filter is applied to an excimer laser annealing method, a phase shift stripe method or an SLS method respectively using a general line beam to thereby reduce the height of protrusions on a polycrystalline surface.
    Type: Application
    Filed: June 9, 2006
    Publication date: November 16, 2006
    Inventors: Kazuo Takeda, Takeshi Sato, Masakazu Saito, Jun Gotoh
  • Publication number: 20060131587
    Abstract: The present invention provides a manufacturing method of a high performance active matrix substrate at a high throughput with a less expensive apparatus, and an image display device using the active matrix substrate. On a stage moving in the short axis direction X and long axis direction Y on a rail, a glass substrate is carried, which has an amorphous silicon semiconductor film formed. Polycrystallized and large grain silicon film may be obtained by intensity modulating the pulsed laser beam in a line beam shape by means of a phase shift mask with a periodicity in the long axis direction Y of the laser beam, moving the laser beam randomly in the modulation direction of the amorphous silicon semiconductor film formed on the glass substrate to expose to crystallize the film. The image display device may incorporate an active matrix substrate having active elements such as thin film transistors formed by this silicon film.
    Type: Application
    Filed: January 30, 2006
    Publication date: June 22, 2006
    Inventors: Takeshi Sato, Tazuo Takeda, Masakazu Saito, Jun Goto, Makoto Ohkura