Patents by Inventor Norikazu Kadotani

Norikazu Kadotani 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: 20220308385
    Abstract: A light modulation device having a pixel arrangement region in which a plurality of pixels are arranged includes a first substrate, a second substrate disposed to be opposed to the first substrate via a liquid crystal layer, and a cooling member disposed on the opposite side of the first substrate with respect to the second substrate and thermally connected to the second substrate. The cooling member includes a hollow space in which working fluid is encapsulated and changes the working fluid in a liquid phase to the working fluid in a gas phase to cool the liquid crystal layer via the second substrate.
    Type: Application
    Filed: March 28, 2022
    Publication date: September 29, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norikazu KADOTANI, Takanori FUKUYAMA, Katsunori TANAKA, Minoru MORIWAKI, Suguru UCHIYAMA
  • Publication number: 20220299851
    Abstract: A wavelength conversion device includes a rotating device, a substrate rotated by the rotating device, a wavelength conversion element, and a first cooling device including, on an inside, a space in which working fluid is encapsulated, the first cooling device cooling the wavelength conversion element. The first cooling device is disposed in a position corresponding to the wavelength conversion element. The space extends from an outer edge side of the substrate to a rotation axis side. The first cooling device includes an evaporator and a condenser which are provided in the space. The evaporator includes a liquid retaining part configured to retain the working fluid in a liquid phase. The liquid retaining part is provided at the outer edge side in the space and disposed in the position corresponding to the wavelength conversion element.
    Type: Application
    Filed: June 2, 2022
    Publication date: September 22, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norikazu KADOTANI, Takahiro MIYATA
  • Patent number: 11448947
    Abstract: A wavelength conversion device includes a rotating device, a substrate rotated by the rotating device, a wavelength conversion element, and a first cooling device including, on an inside, a space in which working fluid is encapsulated, the first cooling device cooling the wavelength conversion element. The first cooling device is disposed in a position corresponding to the wavelength conversion element. The space extends from an outer edge side of the substrate to a rotation axis side. The first cooling device includes an evaporator and a condenser which are provided in the space. The evaporator includes a liquid retaining part configured to retain the working fluid in a liquid phase. The liquid retaining part is provided at the outer edge side in the space and disposed in the position corresponding to the wavelength conversion element.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: September 20, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Norikazu Kadotani, Takahiro Miyata
  • Patent number: 11217218
    Abstract: A sound absorber includes a side surface section (a first wall section) in which a plurality of first holes are provided, the side surface section including a first surface and a second surface, a thin film stuck to the first surface of the side surface section, a partition wall (a second wall section) opposed to the second surface and provided in a position separated from the second surface, at least one second hole being provided in the partition wall, and a porous material provided to be opposed to the second wall section in a position separated from the partition wall.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: January 4, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Norikazu Kadotani, Ken Terai, Yoshiaki Iwatani, Masatoshi Tanaka, Shin Aruga
  • Patent number: 10848722
    Abstract: A projector includes a light source, a light modulator configured to modulate light emitted from the light source, an optical projection device configured to project the modulated light, a light path changer between the light modulator and the optical projection device and on which the modulated light is incident, and a cooler that cools the light modulator and the light path changer. The light path changer includes an optical member to change the light path of the incident light and a first fluctuation member. The first fluctuation member includes a permanent magnet, a coil, and a coil holder holding the coil, and fluctuates the optical member by supplying power to the coil. The cooler includes a fan and a duct to deliver cooling air toward the light path changer. The duct includes a sending port that faces the coil holder and flows the cooling air toward the light path changer.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: November 24, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Norikazu Kadotani, Takahiro Totsuka, Kensaku Matsumoto
  • Patent number: 10809608
    Abstract: In a projection-type display apparatus, a polarization converter, a light-incident-side polarizer, a first liquid crystal device, a first light-exiting-side polarizer, and a retardation film are arranged along the optical path from a light source section to a projection system. The light-incident-side polarizer is a wire grid polarizer including a wire grid integrally provided on the light exiting surface of the polarization converter, and the light-incident-side polarizer and the polarization converter form a single optical part. The first light-exiting-side polarizer is a wire grid polarizer including a wire grid integrally provided on the light exiting surface of the first liquid crystal device, and the first light-exiting-side polarizer and the first liquid crystal device form a single optical part.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: October 20, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Norikazu Kadotani, Kaname Nagatani
  • Publication number: 20200310233
    Abstract: A wavelength conversion device includes a rotating device, a substrate rotated by the rotating device, a wavelength conversion element, and a first cooling device including, on an inside, a space in which working fluid is encapsulated, the first cooling device cooling the wavelength conversion element. The first cooling device is disposed in a position corresponding to the wavelength conversion element. The space extends from an outer edge side of the substrate to a rotation axis side. The first cooling device includes an evaporator and a condenser which are provided in the space. The evaporator includes a liquid retaining part configured to retain the working fluid in a liquid phase. The liquid retaining part is provided at the outer edge side in the space and disposed in the position corresponding to the wavelength conversion element.
    Type: Application
    Filed: March 24, 2020
    Publication date: October 1, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norikazu KADOTANI, Takahiro MIYATA
  • Publication number: 20200195897
    Abstract: A projector includes a light source, a light modulator configured to modulate light emitted from the light source, an optical projection device configured to project the modulated light, a light path changer between the light modulator and the optical projection device and on which the modulated light is incident, and a cooler that cools the light modulator and the light path changer. The light path changer includes an optical member to change the light path of the incident light and a first fluctuation member. The first fluctuation member includes a permanent magnet, a coil, and a coil holder holding the coil, and fluctuates the optical member by supplying power to the coil. The cooler includes a fan and a duct to deliver cooling air toward the light path changer. The duct includes a sending port that faces the coil holder and flows the cooling air toward the light path changer.
    Type: Application
    Filed: February 27, 2020
    Publication date: June 18, 2020
    Inventors: Norikazu Kadotani, Takahiro Totsuka, Kensaku Matsumoto
  • Patent number: 10616538
    Abstract: A projector includes a light source, a light modulator configured to modulate light emitted from the light source, an optical projection device configured to project the light modulated by the light modulator, a light path changer disposed between the light modulator and the optical projection device and on which the light modulated by the light modulator is incident, the light path changer changing a light path of the incident light through fluctuation, and a cooler cooling the light modulator and the light path changer.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: April 7, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Norikazu Kadotani, Takahiro Totsuka, Kensaku Matsumoto
  • Publication number: 20190346756
    Abstract: In a projection-type display apparatus, a polarization converter, a light-incident-side polarizer, a first liquid crystal device, a first light-exiting-side polarizer, and a retardation film are arranged along the optical path from a light source section to a projection system. The light-incident-side polarizer is a wire grid polarizer including a wire grid integrally provided on the light exiting surface of the polarization converter, and the light-incident-side polarizer and the polarization converter form a single optical part. The first light-exiting-side polarizer is a wire grid polarizer including a wire grid integrally provided on the light exiting surface of the first liquid crystal device, and the first light-exiting-side polarizer and the first liquid crystal device form a single optical part.
    Type: Application
    Filed: May 8, 2019
    Publication date: November 14, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norikazu KADOTANI, Kaname NAGATANI
  • Patent number: 10462436
    Abstract: A projector includes: a light source; a light modulation device that modulates light emitted from the light source; an optical projection device that projects the light modulated by the light modulation device; a light path changing element (shift element) that is disposed between the light modulation device and the optical projection device and changes a light path of the light modulated by the light modulation device through fluctuation; and a cooling device that cools the light modulation device and the light path changing element (shift element).
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: October 29, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Norikazu Kadotani, Takahiro Totsuka, Kensaku Matsumoto
  • Publication number: 20190327456
    Abstract: A projector includes a light source, a light modulator configured to modulate light emitted from the light source, an optical projection device configured to project the light modulated by the light modulator, a light path changer disposed between the light modulator and the optical projection device and on which the light modulated by the light modulator is incident, the light path changer changing a light path of the incident light through fluctuation, and a cooler cooling the light modulator and the light path changer.
    Type: Application
    Filed: July 1, 2019
    Publication date: October 24, 2019
    Inventors: Norikazu Kadotani, Takahiro Totsuka, Kensaku Matsumoto
  • Patent number: 10353278
    Abstract: A projector includes an exterior housing including an exhaust port and a cooling device provided in the exterior housing and configured to discharge the air, which has cooled a cooling target, to the outside of the exterior housing via the exhaust port. The exterior housing includes a partition member that partitions the exhaust port and forms a plurality of openings. The partition member includes projecting sections projecting from an end edge of at least one of the plurality of openings into the opening.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: July 16, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Norikazu Kadotani, Keita Tsukioka
  • Publication number: 20190187542
    Abstract: A projector includes an optical element (e.g., liquid crystal panels as light modulation element) as a cooling target, a blast fan (a suction fan) adapted to feed air (outside air) for cooling, a duct adapted to make the air by the blast fan flow, and having an exhaust port (ejection ports) opposed to the optical element, and a furry member provided to an inside wall of the duct.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 20, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norikazu Kadotani, Yoshiaki Iwatani
  • Publication number: 20190115003
    Abstract: A sound absorber includes a side surface section (a first wall section) in which a plurality of first holes are provided, the side surface section including a first surface and a second surface, a thin film stuck to the first surface of the side surface section, a partition wall (a second wall section) opposed to the second surface and provided in a position separated from the second surface, at least one second hole being provided in the partition wall, and a porous material provided to be opposed to the second wall section in a position separated from the partition wall.
    Type: Application
    Filed: October 15, 2018
    Publication date: April 18, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norikazu KADOTANI, Ken TERAI, Yoshiaki IWATANI, Masatoshi TANAKA, Shin ARUGA
  • Patent number: 10018898
    Abstract: A projector includes a cooling fan that discharges cooling air toward a liquid crystal panel as a target to be cooled, a liquid crystal panel frame that holds the liquid crystal panel, and a turbulence generator that is disposed at an upstream-side end portion of the liquid crystal panel in relation to the cooling air, converts the cooling air into turbulence, and causes the turbulence to flow toward the liquid crystal panel, and the turbulence generator includes an inclined section having an inclined surface and a plate-shaped protruding section formed on the inclined surface and inclined by an inclination angle with respect to a direction in which the cooling air flows into the turbulence generator.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: July 10, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Norikazu Kadotani, Keita Tsukioka
  • Publication number: 20170357149
    Abstract: A projector includes an exterior housing including an exhaust port and a cooling device provided in the exterior housing and configured to discharge the air, which has cooled a cooling target, to the outside of the exterior housing via the exhaust port. The exterior housing includes a partition member that partitions the exhaust port and forms a plurality of openings. The partition member includes projecting sections projecting from an end edge of at least one of the plurality of openings into the opening.
    Type: Application
    Filed: December 9, 2015
    Publication date: December 14, 2017
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norikazu KADOTANI, Keita TSUKIOKA
  • Patent number: 9664985
    Abstract: A cooling apparatus includes a cooling fan that has a rotating blade and a fan case accommodating the blade and delivers cooling air and a holder that holds the cooling fan. The holder has a first member and a second member that sandwich and support the cooling fan, and the first member and the second member are made of materials having physical properties different from each other and hence have natural frequencies different from each other.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: May 30, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Masato Kadotani, Norikazu Kadotani
  • Patent number: 9667926
    Abstract: A projector includes a circulation cooling device, a controller that controls the projector, and an exterior housing that accommodates the circulation cooling device and the controller and forms the exterior of the projector. The circulation cooling device includes a cooling fan that blows a cooling gas to an object to be cooled, a heat absorber that absorbs heat of the gas having cooled the object to be cooled, and a relay section that forms, along with the closed housing, a closed space and relays electrical connection between the cooling fan and the controller, and the relay section includes a double-sided substrate having an inner surface which faces the closed space and on which a connection member electrically connected to the cooling fan is arranged and an outer surface which faces away from the closed space and on which a connection member electrically connected to the controller is arranged.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: May 30, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Norikazu Kadotani, Fumihide Sasaki, Hideki Takasuka
  • Patent number: RE47530
    Abstract: An LED apparatus includes a base having thermal conductivity, an insulative substrate provided on one surface of the base and including electrodes provided on a surface of the substrate, at least one base-mounting area that is an exposed part of the base, exposed within a pass-through hole provided in the substrate, a plurality of LED elements mounted on the base in the base-mounting area and some of the LED elements in a unit electrically connected to the electrodes in series, a plurality of the units are electrically connected in parallel, and a frame disposed to surround the base-mounting area and configured to form a light-emitting area.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: July 23, 2019
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Norikazu Kadotani, Koichi Fukasawa, Sadato Imai