Patents by Inventor Masaki Koyama

Masaki Koyama 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: 20200373866
    Abstract: Controllability of a linear motor or a compressor is improved in a linear motor system that includes: an armature having magnetic poles and winding wires; a mover having a permanent magnet; and a power conversion unit that outputs AC power to the winding wires, in which the mover and the armature are relatively movable, and the mover or the armature is connected to an elastic body. The linear motor system further includes: a position detection unit that detects and outputs the position of the mover with respect to the armature, a position estimation, or a current detection unit that outputs the value of current flowing through the winding wires; and a control unit that controls the output of the power conversion unit on the basis of the output of the position detection unit, the output of the position estimation unit, or the output of the current detection unit.
    Type: Application
    Filed: August 13, 2020
    Publication date: November 26, 2020
    Inventors: Takahiro SUZUKI, Shuhei NAGATA, Wataru HATSUSE, Masaki KOYAMA
  • Publication number: 20200363038
    Abstract: A lighting apparatus includes: a laser light source emitting laser light; a liquid crystal device that transmits the laser light from the laser light source and diffracts the laser light; a phosphor unit that receives laser light from the liquid crystal device, converts a wavelength of the laser light to emit illumination light, the phosphor unit including a first phosphor of a first color and a second phosphor of a second color differing from the first color. The liquid crystal device controls an angle of the laser light and selects one of the first phosphor or the second phosphor.
    Type: Application
    Filed: August 7, 2020
    Publication date: November 19, 2020
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventor: Masaki Koyama
  • Patent number: 10784809
    Abstract: Controllability of a linear motor or a compressor is improved. There is provided a linear motor system that includes: an armature having magnetic poles and winding wires; a mover having a permanent magnet; and a power conversion unit that outputs AC power to the winding wires, in which the mover and the armature are relatively movable, and the mover or the armature is connected to an elastic body. The linear motor system further includes: a position detection unit that detects and outputs the position of the mover with respect to the armature, a position estimation, or a current detection unit that outputs the value of current flowing through the winding wires; and a control unit that controls the output of the power conversion unit on the basis of the output of the position detection unit, the output of the position estimation unit, or the output of the current detection unit.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: September 22, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Suzuki, Shuhei Nagata, Wataru Hatsuse, Masaki Koyama
  • Patent number: 10766330
    Abstract: In an air suspension system, starting of a compressor is facilitated in a condition in which there exists a pressure difference. There is provided an air suspension system in which air compressed by a compressor is supplied to a plurality of air chambers provided between a vehicle body side and a wheel side and configured to perform vehicle height adjustment in accordance with the supply and discharge of air. The compressor has a needle connected to a piston and extending in a moving direction of the piston, and an armature reciprocating the needle in the moving direction of the piston.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: September 8, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shinji Seto, Masaki Koyama, Shuhei Nagata, Takashi Ogawa, Yosuke Tanabe, Takahiro Suzuki, Kan Kobayashi, Naofumi Harada, Yoshinori Kawai, Tomoyuki Ri
  • Patent number: 10727727
    Abstract: Provided are: a linear motor that has increased compactness and that can effectively use magnetic flux; and an apparatus provided with the linear motor. The linear motor has a top mobile element and a bottom mobile element provided below the top mobile element, and an armature has: a top first set of magnetic pole teeth comprising two magnetic pole teeth opposing each other in the vertical direction across a space through which the top mobile element can move in a reciprocating manner; and a bottom first set of magnetic pole teeth comprising two magnetic pole teeth opposing each other in the vertical direction across a space through which the bottom mobile element can move in a reciprocating manner.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: July 28, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Aoyama, Masaki Koyama, Takahiro Suzuki, Shuhei Nagata
  • Publication number: 20200195997
    Abstract: An image display method includes receiving an integrated image in which low-resolution images of a scene from different viewpoints are arranged, displaying the integrated image such that a low-resolution image among the low-resolution images is displayed in a first size, receiving a high-resolution image having a same viewpoint as the low-resolution image, the high-resolution image having a higher resolution than the low-resolution image, displaying the high-resolution image in a second size larger than the first size, and displaying the low-resolution image in a third size larger than the first size after the integrated image is displayed and before the high-resolution image is displayed in the second size.
    Type: Application
    Filed: February 26, 2020
    Publication date: June 18, 2020
    Inventors: Satoshi YOSHIKAWA, Toshiyasu SUGIO, Toru MATSUNOBU, Tatsuya KOYAMA, Masaki FUKUDA
  • Publication number: 20200195119
    Abstract: Provided is a linear motor control apparatus capable of improving estimation accuracy of a resonance frequency immediately after start, and a compressor equipped with the linear motor control apparatus. A linear motor control apparatus includes a winding to which an AC voltage is applied and a mover which is connected to an elastic body, in which the linear motor control apparatus includes an operation mode (1) which monotonously increases amplitude of the AC voltage while keeping a frequency of the AC voltage substantially constant, and an operation mode (2) which changes the frequency of the AC voltage while keeping the amplitude of the AC voltage substantially constant, and executes the operation mode (1) and the operation mode (2) in this order.
    Type: Application
    Filed: October 5, 2017
    Publication date: June 18, 2020
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Takahiro SUZUKI, Shuhei NAGATA, Wataru HATSUSE, Masaki KOYAMA
  • Publication number: 20200135430
    Abstract: A plasma processing apparatus comprises a processing chamber, a gas supply unit, a power supply unit and a frequency control unit. The processing chamber accommodates a target object. The gas supply unit supplies a processing gas into the processing chamber. The power supply unit supplies a power of a predetermined frequency band into the processing chamber to generate plasma of the processing gas in the processing chamber. The frequency control unit sweeps a frequency of the power supplied into the processing chamber by the power supply unit from a first frequency to a second frequency at the time of generating the plasma of the processing gas in the processing chamber.
    Type: Application
    Filed: September 6, 2019
    Publication date: April 30, 2020
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Masaki INOUE, Koji KOYAMA, Yasutaka SAKAI
  • Patent number: 10520022
    Abstract: Provided is a linear motion device having higher rigidity, higher load resistance, and superior guiding precision.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: December 31, 2019
    Assignee: NIPPON BEARING CO., LTD.
    Inventors: Toru Yamazaki, Tomohiko Kikuchi, Yusuke Ueki, Masaki Kawamura, Taku Koyama
  • Publication number: 20190356207
    Abstract: An object of the present invention is to provide a linear motor and a compressor which are effective against a non-fixed structure in which end portions of a resonant spring are not fixed and are capable of restraining loads in an up-down direction and a left-right direction which act on a slider. A linear motor includes a slider (2) which is driven in a first direction, a resonance spring (400) which is capable of vibrating in the first direction, and a permanent magnet (210) which is provided at the slider (2) and is magnetized in a second direction perpendicular to the first direction. The linear motor includes a bearing (480) that is movable against both forces of a force in the second direction and a force in a third direction perpendicular to the first direction and the second direction, and an elastic-body support member (450) which connects the resonant spring (400) and the bearing (480) to each other.
    Type: Application
    Filed: October 25, 2017
    Publication date: November 21, 2019
    Applicants: Hitachi Automotive Systems, Ltd., Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Masaki KOYAMA, Shuhei NAGATA, Naoyuki OOHATA, Kan KOBAYASHI, Yoshinori KAWAI
  • Publication number: 20190344399
    Abstract: Disclosed is a light transmitting member for a polishing pad. The light transmitting member has a cylindrical or truncated conical shape, and a screw thread is formed on a side portion thereof. A polishing pad includes such a light transmitting member and a substrate polishing apparatus includes such a polishing pad.
    Type: Application
    Filed: May 7, 2019
    Publication date: November 14, 2019
    Inventors: Masaki Kinoshita, Sachiko Takeda, Chikako Koyama
  • Publication number: 20190316631
    Abstract: Provided is a linear motion device having higher rigidity, higher load resistance, and superior guiding precision.
    Type: Application
    Filed: August 7, 2017
    Publication date: October 17, 2019
    Inventors: Toru YAMAZAKI, Tomohiko KIKUCHI, Yusuke UEKI, Masaki KAWAMURA, Taku KOYAMA
  • Publication number: 20190238066
    Abstract: Provided are a power conversion device and a system using the same, which can reduce loss of each semiconductor element in a power conversion circuit and enable high efficiency of a device controlled by the power conversion device. The power conversion device includes a direct current (DC) power source; and a full-bridge circuit having first upper and lower arms having an upper element and a lower element and second upper and lower arms having an upper element and a lower element, in which the first upper and lower arms and the second upper and lower arms are electrically connectable to a device, and ON resistances of the upper element of the first upper and lower arms and the lower element of the second upper and lower arms are smaller than ON resistances of the lower element of the first upper and lower arms and the upper element of the second upper and lower arms.
    Type: Application
    Filed: September 29, 2017
    Publication date: August 1, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Wataru HATSUSE, Masaki KOYAMA, Shuhei NAGATA, Takahiro SUZUKI
  • Publication number: 20190211207
    Abstract: The method for producing a resin composition of the present invention includes a step of obtaining a lignin-containing solution that contains a solubilized lignin prepared through a treatment of separating lignin in a lignin-containing solution and a solvent, and a step of adding a resin to the lignin-containing solution to thereby obtain a lignin/resin-containing solution. Also, the method for producing a resin composition of the present invention includes a step of mixing the lignin/resin-containing solution with at least one solvent selected from water and a hydrocarbon having a dipole moment of 0.25 d or less. The lignin-containing resin molded article of the present invention uses the resin composition obtained according to the production method of the present invention.
    Type: Application
    Filed: September 4, 2017
    Publication date: July 11, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshihito KOYAMA, Shinobu YAMAO, Masaki OKANO
  • Publication number: 20190170130
    Abstract: Controllability of a linear motor or a compressor is improved. There is provided a linear motor system that includes: an armature having magnetic poles and winding wires; a mover having a permanent magnet; and a power conversion unit that outputs AC power to the winding wires, in which the mover and the armature are relatively movable, and the mover or the armature is connected to an elastic body. The linear motor system further includes: a position detection unit that detects and outputs the position of the mover with respect to the armature, a position estimation, or a current detection unit that outputs the value of current flowing through the winding wires; and a control unit that controls the output of the power conversion unit on the basis of the output of the position detection unit, the output of the position estimation unit, or the output of the current detection unit.
    Type: Application
    Filed: April 11, 2017
    Publication date: June 6, 2019
    Applicant: Hitachi, Ltd.
    Inventors: Takahiro SUZUKI, Shuhei NAGATA, Wataru HATSUSE, Masaki KOYAMA
  • Patent number: 10288117
    Abstract: To provide a motor system that can control the position of a control object in multiple directions while suppressing the number of required switching elements. A motor system includes: a power conversion device including first, second, and third up-down arms each including two switching elements connected in series; a control object; and a first load including a magnetic pole tooth facing the control object, and a winding wound around the magnetic pole tooth. The motor system includes a second load including two magnetic pole teeth facing each other in a second direction with the control object therebetween, and a winding wound around one or both of the magnetic pole teeth. The power conversion device provides a force with respect to a first direction to the control object through an output to the first load, and provides a force with respect to the second direction to the control object through an output to the second load.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: May 14, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Suzuki, Yasuaki Aoyama, Shuhei Nagata, Masaki Koyama
  • Publication number: 20180304718
    Abstract: In an air suspension system, starting of a compressor is facilitated in a condition in which there exists a pressure difference. There is provided an air suspension system in which air compressed by a compressor is supplied to a plurality of air chambers provided between a vehicle body side and a wheel side and configured to perform vehicle height adjustment in accordance with the supply and discharge of air. The compressor has a needle connected to a piston and extending in a moving direction of the piston, and an armature reciprocating the needle in the moving direction of the piston.
    Type: Application
    Filed: September 20, 2016
    Publication date: October 25, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shinji SETO, Masaki KOYAMA, Shuhei NAGATA, Takashi OGAWA, Yosuke TANABE, Takahiro SUZUKI, Kan KOBAYASHI, Naofumi HARADA, Yoshinori KAWAI, Tomoyuki RI
  • Patent number: 10090748
    Abstract: A linear motor includes an armature with two magnetic poles arranged in the Z direction, and winding wires wound around the two magnetic poles, respectively, and a mover with a permanent magnet, which moves relative to the armature in the Z direction. A first auxiliary magnetic pole is disposed between the two magnetic poles, and a bridge is disposed between the first auxiliary magnetic pole and the magnetic pole. The two winding wires are electrically coupled.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: October 2, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Shuhei Nagata, Masaki Koyama, Takahiro Suzuki, Yasuaki Aoyama
  • Patent number: 10047746
    Abstract: A refrigerant compressor (100) includes: a sealed vessel (103); a compression mechanism (101) that sucks refrigerant, sucked in the sealed vessel (103), for compression; a motor (102) that drives the compression mechanism (101); a suction pipe (104) for sucking the refrigerant into the sealed vessel (103) when sucking the refrigerant; a cover (117a) arranged to face an outlet of the suction pipe (104), to force the refrigerant sucked through the suction pipe (104) to collide against the cover for gas-liquid separation, and to allow liquid refrigerant from the separation to drop on a coil (126) of the motor (102); and a suction passage (118) that introduces gas refrigerant from the gas-liquid separation, for which the refrigerant sucked through the suction pipe is forced to collide against the cover (117a), to an inlet of the compression chamber provided in the compression mechanism (101).
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: August 14, 2018
    Assignee: Hitachi-Johnston Controls Air Conditioning, Inc.
    Inventors: Masaki Koyama, Keiji Sasao
  • Publication number: 20180003224
    Abstract: To provide a motor system that can control the position of a control object in multiple directions while suppressing the number of required switching elements. A motor system includes: a power conversion device including first, second, and third up-down arms each including two switching elements connected in series; a control object; and a first load including a magnetic pole tooth facing the control object, and a winding wound around the magnetic pole tooth. The motor system includes a second load including two magnetic pole teeth facing each other in a second direction with the control object therebetween, and a winding wound around one or both of the magnetic pole teeth. The power conversion device provides a force with respect to a first direction to the control object through an output to the first load, and provides a force with respect to the second direction to the control object through an output to the second load.
    Type: Application
    Filed: January 7, 2015
    Publication date: January 4, 2018
    Applicant: Hitachi, Ltd.
    Inventors: Takahiro SUZUKI, Yasuaki AOYAMA, Shuhei NAGATA, Masaki KOYAMA