Patents by Inventor Koichi Akiyama

Koichi Akiyama 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).

  • Patent number: 11556051
    Abstract: An illuminator includes a light emitting apparatus which outputs first light belonging to a first wavelength band, a wavelength converter which converts part of the first light into second light belonging to a second wavelength band and causes the second and remainder of the first light to exit, a first optical system with positive power and which the first light enters, an optical element which the remaining first light enters and which reflects either the first or second light and transmits the other, a second optical system with positive power and which the first from the optical element and second light from the converter enter, a third optical system with positive power and causes the first light from the second optical system to enter the converter, and a fourth optical system with positive power and which the second light from the second optical system enters.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: January 17, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11548371
    Abstract: A drive system including first and second power sources, first and second output shafts, a differential mechanism, and an electronic control unit, and a control method therefor are provided. The differential mechanism is configured such that the second power source is connected to a first rotating element, one output shaft of a vehicle is connected to a second rotating element, and the other output shaft of the vehicle is connected to a third rotating element so as to be able to be connected to or disconnected from the third rotating element by a connect-disconnect mechanism, and includes at least one of an engagement element that selectively engages any two of the three rotating elements and an engagement element that selectively engages the third rotating element to a fixing member. The electronic control unit is configured to, during turning, prohibit switching between a first drive mode and a second drive mode.
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: January 10, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Koji Takaira, Akinori Homan, Yosuke Akiyama, Akira Ijichi, Kunihiko Usui
  • Patent number: 11543743
    Abstract: A light source apparatus includes a light source section, a first optical layer that transmits first light polarized in a first polarization direction and incident from the light source section and reflects the first light polarized in a second polarization direction and incident from the light source section, a second optical layer that transmits the first light polarized in the first polarization direction and incident from the first optical layer, a third optical layer that transmits the first light polarized in the first polarization direction and incident from the second optical layer, a fourth optical layer that reflects the first light polarized in the first polarization direction and incident from the third optical layer, a diffusion element, and a wavelength converter.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: January 3, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11546563
    Abstract: A light source device according to the present disclosure includes a light source section, a first polarization split element for transmitting first light with a first polarization direction from the light source section and reflecting the first light with a second polarization direction, a first retardation element, a second polarization split element for reflecting the first light in the second polarization direction from the first retardation element, a second retardation element, and a light conversion device having a diffusion element for diffusing the first light from the second retardation element, a first wavelength conversion element for performing wavelength conversion on the first light to emit second light, and a substrate.
    Type: Grant
    Filed: October 1, 2021
    Date of Patent: January 3, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Wataru Yasumatsu, Norio Nakamura, Yuta Tokuno, Koichi Akiyama
  • Publication number: 20220404275
    Abstract: A biological component measurement apparatus includes an optical medium, an excitation light source, a probe light source, and a light position detector. The optical medium includes a sample placement surface. The excitation light source emits excitation light toward a sample placed on the sample placement surface. The probe light source emits probe light that travels through the optical medium. The light position detector detects the position of the probe light outgoing from the optical medium. The optical medium is formed from chalcogenide glass.
    Type: Application
    Filed: July 27, 2020
    Publication date: December 22, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shusaku HAYASHI, Koichi AKIYAMA, Yuki TSUDA
  • Patent number: 11531206
    Abstract: The present disclosure relates to a light source apparatus including a laser light source that outputs a laser beam and a collimator system that parallelizes the laser beam. The collimator system includes three lens groups. A first group includes a first anamorphic lens having negative power in a first direction. A second group includes a second anamorphic lens having positive power in a second direction perpendicular to the first direction. A third group includes a third anamorphic lens having positive power in the first direction.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: December 20, 2022
    Assignee: Seiko Epson Corporation
    Inventor: Koichi Akiyama
  • Patent number: 11531260
    Abstract: An illumination device includes a first light emitting element emitting first light in a first wavelength band, a wavelength conversion element converting a part of the first light into second light including a second wavelength band and a third wavelength band, diffusing another part of the first light, and emitting a result, a second light emitting element for emitting third light having the second wavelength band, a first optical element having a first area for reflecting the first light to enter the wavelength conversion element, reflecting fourth light having the second wavelength band out of the second light, and reflecting the third light, and a second area for transmitting the first light and the second light, and a second optical element for transmitting the first light to enter the first optical element, and reflecting the fourth light to enter the wavelength conversion element via the first area.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: December 20, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Publication number: 20220388493
    Abstract: A vehicle driving apparatus includes: an engine; a first rotary electric machine; first and second output shafts; a power distribution device for distributing a power between the first and second output shafts; and a control device for controlling an electric-power generation torque of a second rotary electric machine such that a power distribution ratio between the first and second output shafts becomes a target distribution ratio, and controlling a total torque of the engine and the first rotary electric machine such that a requested drive torque is obtained. The control device executes an electric-power consuming control to supply at least a part of a generated electric power generated by the second rotary electric machine, to the first rotary electric machine without via a power storage device, and to drive the first rotary electric machine, such that an operation state of the engine is brought close to a fuel-economy optimum state.
    Type: Application
    Filed: May 26, 2022
    Publication date: December 8, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Koji TAKAIRA, Yuuki MAKINO, Akinori HOMAN, Yosuke AKIYAMA, Akira IJICHI, Kunihiko USUI
  • Patent number: 11523093
    Abstract: A light source apparatus includes a light source section that outputs first light, a first polarization separator that separates the first light in terms of polarization, a second polarization separator that reflects in the second direction a portion of the first light polarized in the first polarization direction and transmits the other portion of the first light polarized in the first polarization direction, a diffusion element that diffuses the first light incident from the first polarization separator, a first wavelength converter that converts in terms of wavelength the portion of the first light incident from the second polarization separator and emits second light, and a second wavelength converter that converts in terms of wavelength the other portion of the first light incident from the second polarization separator and emits third light.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: December 6, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11500136
    Abstract: A light source device according to the present disclosure includes a light source section for emitting a first pencil and a second pencil which have a first wavelength band, a first optical element for altering a proceeding direction of a principal ray of the first pencil, a second optical element for altering a proceeding direction of a principal ray of the second pencil, and a wavelength conversion layer having a plane of incidence which the first pencil and the second pencil enter, and for performing wavelength conversion of the first pencil and the second pencil into fluorescence having a second wavelength band. The first optical element and the second optical element alter the proceeding directions of the principal ray of the first pencil and the principal ray of the second pencil so that the first pencil and the second pencil fail to overlap each other on the plane of incidence.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: November 15, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11493840
    Abstract: A light source device according to the present disclosure includes a light source section for emitting a first pencil and a second pencil, a first optical element for altering a proceeding direction of a principal ray of the first pencil, a second optical element for altering a proceeding direction of a principal ray of the second pencil, a wavelength conversion layer having a plane of incidence, a reflecting surface, a first side surface, and a second side surface, a first reflecting element having a first reflecting surface, and a second reflecting element having a second reflecting surface.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: November 8, 2022
    Assignee: Seiko Epson Corporation
    Inventor: Koichi Akiyama
  • Patent number: 11487194
    Abstract: A wavelength conversion element includes a wavelength conversion layer having a light incident surface and converting a first light into a second light, a substrate having a support surface, a first optical member having a first optical layer transmitting the first light and reflect the second light, a second optical member having a second optical layer reflecting the second light and crossing the support surface and the first optical layer, a third optical member having a third optical layer reflecting the second light and facing the second optical layer. An opening is formed by the substrate and the first, second and third optical members. A first area of the light incident surface is larger than a second area of a light incident area. The second area is larger than a third area of the opening. The second light is emitted from the opening.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: November 1, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11480862
    Abstract: A light source device includes a light source, a first polarization split element for transmitting first light from the light source which is polarized in a first polarization direction and reflecting the first light polarized in a second polarization direction, a first optical element for reflecting the first light from the first polarization split element, a diffusion element for diffusing the first light from the first polarization split element, a wavelength conversion element for performing wavelength conversion on the first light from the first optical element to emit second light, a second polarization split element which the second light enters from the first optical element, and which transmits the second light polarized in the first polarization direction and reflects the second light polarized in the second polarization direction, and a second optical element for reflecting the second light from the second polarization split element, polarized in the second polarization direction.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: October 25, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11474424
    Abstract: A light source device according to the present disclosure includes a light source section, a first polarization split layer for transmitting first light polarized in a first polarization direction and reflecting the first light polarized in a second polarization direction, a first optical layer and a second polarization split layer for transmitting the first light polarized in the first polarization direction, a second optical layer for reflecting the first light polarized in the first polarization direction, a diffusion element, a wavelength conversion element for performing wavelength conversion on the first light to emit second light, and a first color separation element.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: October 18, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11467481
    Abstract: A light source device according to the present disclosure includes a light source section for emitting first light, a first polarization split element for performing polarization split on the first light, a second polarization split element for reflecting the first light polarized in a first polarization direction and transmitting the first light polarized in a second polarization direction, a diffusion element for diffusing the first light from the first polarization split element, a wavelength conversion element for performing wavelength conversion on the first light entering the wavelength conversion element from the second polarization split element to emit second light, and an optical element having a flat-surface area and the concave-surface area.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: October 11, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11460764
    Abstract: A light source apparatus according to the present disclosure includes a first light source section that outputs first light, a second light source section that outputs second light, a first polarization separator that transmits the first light and the second light polarized in a first polarization direction and reflects the first light polarized in a second polarization direction, a second polarization separator that reflects the first light polarized in the first polarization direction, a first diffusion element that diffuses the first light incident from the first polarization separator, a wavelength converter that converts in terms of wavelength the first light and emits third light, and a second diffusion element that diffuses the second light incident from the second polarization separator.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: October 4, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama
  • Patent number: 11461595
    Abstract: An image processing apparatus includes: an object detection section that performs convolution computation on an input image based on a captured image obtained by capturing the image with a camera, and that detects an object; a feature map validation section that performs feature map validation validating a likelihood that the input image contains the object on the basis of a feature map obtained by the convolution computation; a time series validation section that performs time series validation validating a result of the feature map validation performed by the feature map validation section in time series; and a detection result correction section that corrects a detection result about the object output by the object detection section on the basis of a result of the time series validation performed by the time series validation section.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: October 4, 2022
    Assignee: CLARION CO., LTD.
    Inventors: Yasuhiro Akiyama, Koichi Hamada
  • Patent number: 11459264
    Abstract: Provided is a method of manufacturing a glass film, including: a conveying step of conveying an elongated glass film (G) along a longitudinal direction thereof; and a cutting step of irradiating the glass film (G) with a laser beam (L) from a laser irradiation apparatus (19) while conveying the glass film (G) through the conveying step, to thereby separate the glass film (G). The cutting step includes generating a thread-like peeled material (Ge) in a helical shape from an end portion of the separated glass film (G) in a width direction. The thread-like peeled material (Ge) has a width (W) of 180 ?m or more and 300 ?m or less. In addition, the thread-like peeled material (Ge) has a helical diameter (D) of 80 mm or more and 200 mm or less.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: October 4, 2022
    Assignee: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Hiroki Mori, Koichi Mori, Shuji Akiyama, Yasuhiro Uemura, Naoyuki Matsumoto
  • Patent number: 11460762
    Abstract: A projector includes a first light source, a first light modulator on which first light is incident, a first polarization separator disposed on a first optical path along which the first light emitted from the first light source and entering the first light modulator travels, a first retardation film disposed on the first optical path, a first reflector disposed on the first optical path, and a second light modulator on which second light different from the first light is incident. The first optical path passes through the first polarization separator and the first retardation film, is then deflected back by the first reflector, and reaches the first light modulator via the first retardation film and the first polarization separator. A second optical path along which the second light travels is independent of the first optical path and does not intersect the first optical path.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: October 4, 2022
    Inventor: Koichi Akiyama
  • Patent number: 11454874
    Abstract: A light source device includes a light source, an optical element for transmitting light from the light source which is polarized in a first polarization direction and reflecting the light polarized in a second polarization direction, a polarization split element for transmitting the light from the optical element which is polarized in first polarization direction and reflecting the light polarized in the second polarization direction, a wavelength conversion element for performing wavelength conversion on the light to emit second light in a second wavelength band, a diffusion element for diffusing the light, a first color separation element for separating light from the polarization split element into third light in a first wavelength band and fourth light in the second wavelength band, and a second color separation element for separating light from the optical element into fifth light in a third wavelength band and sixth light in a fourth wavelength band.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: September 27, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koichi Akiyama