Patents by Inventor Shigekazu Yamagishi

Shigekazu Yamagishi 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: 20190129287
    Abstract: A lighting device of the present disclosure includes an excitation light source, a phosphor, a spreader, a reflective layer, and a reflective region. The excitation light source emits a polarized light. The phosphor receives the light as an excitation light from the excitation light source, and emits a fluorescent light, the phosphor including a plurality of phosphor pieces adjacently disposed on the reflective layer, the plurality of phosphor pieces having a same characteristic. The spreader supports the phosphor. The reflective layer is disposed between the phosphor and the spreader, and reflects the fluorescent light. The reflective region is disposed between the plurality of phosphor pieces, the reflective region reflecting the received excitation light while keeping a polarization characteristic of the received excitation light.
    Type: Application
    Filed: October 23, 2018
    Publication date: May 2, 2019
    Inventors: SHIGEKAZU YAMAGISHI, YUSAKU NISHIKAWA
  • Patent number: 10268111
    Abstract: A phosphor wheel includes a disc-shaped substrate and a phosphor ring fixedly bonded to the substrate. At least three cut-out sections or openings are formed on a rim of the substrate. The shortest length from the center of the substrate to inner edges of the cut-out sections or inner edges of the openings is generally equal to a radius of an outer circumference of the phosphor ring.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: April 23, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takashi Ikeda, Masafumi Tanaka, Shigekazu Yamagishi
  • Publication number: 20190086778
    Abstract: A lighting device of the present disclosure includes: an excitation light source; a phosphor for receiving an excitation light from the excitation light source and emitting a fluorescent light; a spreader for supporting the phosphor; and a reflective layer disposed between the phosphor and the spreader and reflecting the fluorescent light. The phosphor is a plurality of phosphor pieces disposed to be adjacent to each other and having the same characteristic.
    Type: Application
    Filed: September 11, 2018
    Publication date: March 21, 2019
    Inventors: SHIGEKAZU YAMAGISHI, TAKASHI IKEDA, MASAFUMI TANAKA
  • Patent number: 10154252
    Abstract: A projection-type image display apparatus of the present disclosure includes a fluorescent substance, a blue-color laser diode excitation optical system, a DMD, a projection optical system, a polarizing plate, and a depolarizing plate. The fluorescent substance has characteristics of emitting predetermined fluorescence in response to excitation light. The blue-color laser diode has a semiconductor laser that emits laser light of a wavelength with which the fluorescent substance is excited. The excitation optical system condenses light from the blue-color laser diode. The DMD is controllable by a signal from an external source. The projection optical system is an optical system that can enlarge and project an image displayed by the DMD. The polarizing plate is disposed on the output side of the projection optical system.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: December 11, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shigekazu Yamagishi, Michihiro Okuda
  • Publication number: 20180095350
    Abstract: A phosphor wheel module includes a substrate and a phosphor region disposed on a surface of the substrate. The phosphor region includes a phosphor that is disposed on at least a part of a circumference of a circle with a first radius from a rotation center of the substrate. The substrate includes a ventilation region and a heat conduction region. The ventilation region includes a plurality of openings that is located closer to the rotation center of the substrate than the phosphor region. The heat conduction region is located farther away from the rotation center of the substrate than the phosphor region.
    Type: Application
    Filed: September 28, 2017
    Publication date: April 5, 2018
    Inventors: Masafumi TANAKA, Shigekazu YAMAGISHI, Takashi IKEDA
  • Patent number: 9915418
    Abstract: A disk-shaped substrate made of a heat conductive material is provided with, along an outer periphery of one surface of the substrate, a ring-shaped phosphor that emits light by irradiation with blue laser light that is excitation light. The substrate is provided with, on another surface of the substrate, a plurality of convex portions dotting a region corresponding to a region provided with the phosphor. In a phosphor wheel, the substrate is driven by a motor to rotate about an axis of rotation.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: March 13, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shigekazu Yamagishi, Manabu Chikayama, Naoya Kitade
  • Patent number: 9915858
    Abstract: A cooling device cools down a wheel having a disc shape. The wheel is hermetically enclosed in an enclosure and rotationally driven about a rotation shaft. The cooling device includes blade members that are disposed on one surface of the wheel, a heat dissipater to which a gas heated by the wheel is blown by the blade members due to rotation of the wheel, and a gas flow definer that is located inside the enclosure, and separates a flow path along which the gas that has been cooled by the heat dissipater flows before being blown to the one surface and a flow path along which the gas that has been blown to the one surface and heated flows.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: March 13, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Manabu Chikayama, Shigekazu Yamagishi, Shu Namba
  • Patent number: 9863604
    Abstract: A phosphor wheel includes: a substrate; a light reflection layer disposed on one surface of the substrate; a phosphor layer; and a bonding layer which is located between and bonds the light reflection layer and the phosphor layer, wherein the bonding layer contains a particle which is higher in thermal conductivity than a base material of the bonding layer and higher in light reflectance than the light reflection layer.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: January 9, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takashi Ikeda, Masafumi Tanaka, Shigekazu Yamagishi, Hiroki Sugiyama
  • Publication number: 20170269461
    Abstract: A phosphor wheel includes a disc-shaped substrate and a phosphor ring fixedly bonded to the substrate. At least three cut-out sections or openings are formed on a rim of the substrate. The shortest length from the center of the substrate to inner edges of the cut-out sections or inner edges of the openings is generally equal to a radius of an outer circumference of the phosphor ring.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 21, 2017
    Inventors: Takashi IKEDA, Masafumi TANAKA, Shigekazu YAMAGISHI
  • Publication number: 20170227192
    Abstract: A phosphor wheel includes: a substrate; a light reflection layer disposed on one surface of the substrate; a phosphor layer; and a bonding layer which is located between and bonds the light reflection layer and the phosphor layer, wherein the bonding layer contains a particle which is higher in thermal conductivity than a base material of the bonding layer and higher in light reflectance than the light reflection layer.
    Type: Application
    Filed: October 20, 2016
    Publication date: August 10, 2017
    Inventors: Takashi IKEDA, Masafumi TANAKA, Shigekazu YAMAGISHI, Hiroki SUGIYAMA
  • Publication number: 20170192346
    Abstract: A cooling device cools down a wheel having a disc shape. The wheel is hermetically enclosed in an enclosure and rotationally driven about a rotation shaft. The cooling device includes blade members that are disposed on one surface of the wheel, a heat dissipater to which a gas heated by the wheel is blown by the blade members due to rotation of the wheel, and a gas flow definer that is located inside the enclosure, and separates a flow path along which the gas that has been cooled by the heat dissipater flows before being blown to the one surface and a flow path along which the gas that has been blown to the one surface and heated flows.
    Type: Application
    Filed: January 3, 2017
    Publication date: July 6, 2017
    Inventors: Manabu CHIKAYAMA, Shigekazu YAMAGISHI, Shu NAMBA
  • Publication number: 20170175989
    Abstract: A disk-shaped substrate made of a heat conductive material is provided with, along an outer periphery of one surface of the substrate, a ring-shaped phosphor that emits light by irradiation with blue laser light that is excitation light. The substrate is provided with, on another surface of the substrate, a plurality of convex portions dotting a region corresponding to a region provided with the phosphor. In a phosphor wheel, the substrate is driven by a motor to rotate about an axis of rotation.
    Type: Application
    Filed: December 20, 2016
    Publication date: June 22, 2017
    Inventors: Shigekazu YAMAGISHI, Manabu CHIKAYAMA, Naoya KITADE
  • Patent number: 9664893
    Abstract: A phosphor wheel device includes: a phosphor wheel; a motor; and a plurality of blades. The phosphor wheel has: a disc-shaped substrate; and a phosphor disposed on one surface of the substrate in a circumferential direction. The motor rotatably drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, and extend in a radial direction of the phosphor wheel from an axis of rotation of the motor.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: May 30, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shigekazu Yamagishi, Manabu Chikayama
  • Publication number: 20170104984
    Abstract: A projection-type image display apparatus of the present disclosure includes a fluorescent substance, a blue-color laser diode excitation optical system, a DMD, a projection optical system, a polarizing plate, and a depolarizing plate. The fluorescent substance has characteristics of emitting predetermined fluorescence in response to excitation light. The blue-color laser diode has a semiconductor laser that emits laser light of a wavelength with which the fluorescent substance is excited. The excitation optical system condenses light from the blue-color laser diode. The DMD is controllable by a signal from an external source. The projection optical system is an optical system that can enlarge and project an image displayed by the DMD. The polarizing plate is disposed on the output side of the projection optical system.
    Type: Application
    Filed: October 3, 2016
    Publication date: April 13, 2017
    Inventors: Shigekazu YAMAGISHI, Michihiro OKUDA
  • Publication number: 20160077326
    Abstract: A phosphor wheel device includes: a phosphor wheel; a motor; and a plurality of blades. The phosphor wheel has: a disc-shaped substrate; and a phosphor disposed on one surface of the substrate in a circumferential direction. The motor rotatably drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, and extend in a radial direction of the phosphor wheel from an axis of rotation of the motor.
    Type: Application
    Filed: September 11, 2015
    Publication date: March 17, 2016
    Inventors: Shigekazu YAMAGISHI, Manabu CHIKAYAMA
  • Patent number: 9201623
    Abstract: A control device includes an apparatus controller that is connected to at least one apparatus and includes a first memory which stores data for controlling the driving of the apparatus and data indicating a state of the apparatus and a reading and transmitting unit which reads each data item stored in the first memory and transmits the read data, a main controller that includes a central processing unit, a second memory, and a writing unit which writes the data transmitted from the apparatus controller to the second memory, and a full-duplex serial bus that connects the main controller and the apparatus controller. The reading and transmitting unit and the writing unit operate such that each data item stored in the first memory is read, transmitted, and stored in the second memory in a cycle equal to or less than a count cycle of a system timer.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: December 1, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kinichi Yoshida, Yasuaki Mitobe, Shigekazu Yamagishi
  • Patent number: 9122137
    Abstract: The shield includes: a first dust-proof wall that is shiftable integrally with the projection lens, and has width a1 projecting from the projection lens to an A side; and a second dust-proof wall that is slidable within a range regulated by the regulator, and has length b1 on the A side. When the second dust-proof wall has length c2 shiftable to a B side, the projection lens and the second dust-proof wall form a space having length d1 on the A side, and the projection lens and the frame form a space having length e1 on the A side, a1?d1, b1?e1?d1, and b1+d1?e1?c2 are satisfied.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: September 1, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shigekazu Yamagishi, Masato Tanaka, Shu Namba
  • Patent number: 9081268
    Abstract: A lighting device configured to output light of predetermined color includes: a plurality of solid-state light sources including at least a first solid-state light source and a second solid-state light source; a drive section configured to drive each of the plurality of solid-state light sources individually; a first phosphor for excitation by first emission light emitted from the first solid-state light source; and a second phosphor for excitation by second emission light emitted from the second solid-state light source, and first fluorescence and second fluorescence are of different color.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: July 14, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroki Sugiyama, Hiroshi Kitano, Shigekazu Yamagishi
  • Patent number: 9013731
    Abstract: A control device includes an apparatus controller that is connected to at least one apparatus and includes a first memory which stores data for controlling the driving of the apparatus and data indicating a state of the apparatus and a reading and transmitting unit which reads each data item stored in the first memory and transmits the read data, a main controller that includes a central processing unit, a second memory, and a writing unit which writes the data transmitted from the apparatus controller to the second memory, and a full-duplex serial bus that connects the main controller and the apparatus controller. The reading and transmitting unit and the writing unit operate such that each data item stored in the first memory is read, transmitted, and stored in the second memory in a cycle equal to or less than a count cycle of a system timer.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: April 21, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kinichi Yoshida, Yasuaki Mitobe, Shigekazu Yamagishi
  • Publication number: 20150006773
    Abstract: A control device includes an apparatus controller that is connected to at least one apparatus and includes a first memory which stores data for controlling the driving of the apparatus and data indicating a state of the apparatus and a reading and transmitting unit which reads each data item stored in the first memory and transmits the read data, a main controller that includes a central processing unit, a second memory, and a writing unit which writes the data transmitted from the apparatus controller to the second memory, and a full-duplex serial bus that connects the main controller and the apparatus controller. The reading and transmitting unit and the writing unit operate such that each data item stored in the first memory is read, transmitted, and stored in the second memory in a cycle equal to or less than a count cycle of a system timer.
    Type: Application
    Filed: September 15, 2014
    Publication date: January 1, 2015
    Inventors: Kinichi YOSHIDA, Yasuaki MITOBE, Shigekazu YAMAGISHI