Patents by Inventor Taku MATSUZAWA

Taku MATSUZAWA 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: 20190370941
    Abstract: A memory stores image data generated by sensors included in an imager and containing a component data piece for each of color components that has undergone A/D conversion by an A/D converter. A width detector detects, based on the image data having undergone image processing by an image processor, the width along the main scanning direction of a duplicate area in which pieces of image data generated by adjoining sensors overlap each other. A displacement detector detects, based on the width of the duplicate area along the main scanning direction, a displacement of a scan target object for each of optical systems included in the imager. A first blur corrector performs blur correction on the component data piece using a point spread function for each of the color components that is dependent on a displacement of the scan target object.
    Type: Application
    Filed: April 2, 2018
    Publication date: December 5, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shigeru TAKUSHIMA, Hiroyuki KAWANO, Yoshitaka TOYODA, Taku MATSUZAWA
  • Publication number: 20190349495
    Abstract: An illumination device includes a light source and a rod-like light guide extending in a longitudinal direction for guiding incident light to an object to be illuminated. The light source is disposed at an end of the light guide extending in a longitudinal direction. The light guide includes an incident surface at the longitudinal end to receive light emitted from the light source, a flat emission surface to emit light incident on the light guide toward the object to be illuminated, a parabolic reflective surface to reflect, toward the emission surface, light from a focus of the paraboloid shape of the refractive surface or light passing through the focus from a predetermined area, and a light-scattering portion, having a predetermined area, to scatter light entering through the incident surface and reflect the light toward the reflective surface.
    Type: Application
    Filed: February 21, 2018
    Publication date: November 14, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taku MATSUZAWA, Toru SHIRAKI, Hideki KUNISHIO, Daisuke OHAMA
  • Publication number: 20190132470
    Abstract: A plurality of image-forming optical elements are disposed such that a part of a field-of-view region of one image-forming optical element overlaps a part of a field-of-view region of an image-forming optical element disposed adjacent to the one image-forming optical element, each of the image-forming optical elements includes: a lens for collecting light scattered by a reading object; an aperture stop for cutting off some of the light collected by the lens; a phase modulating element for modulating phase of light passing through the aperture stop; and a lens for allowing the light whose phase is modulated by the phase modulating element to form an image on an image-forming surface, and the phase modulating elements are loaded such that resolution characteristics of the phase modulating elements in an arrangement direction of the image-forming optical elements are the same among the image-forming optical elements.
    Type: Application
    Filed: March 29, 2017
    Publication date: May 2, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroyuki KAWANO, Shigeru TAKUSHIMA, Yoshitaka TOYODA, Toru AOKI, Tetsuo FUNAKURA, Taku MATSUZAWA
  • Patent number: 10162096
    Abstract: A light guide includes a first exit portion emitting first exiting light, a second exit portion emitting second exiting light in a different direction than the first exiting light, and a reflecting portion reflecting light entering the light guide to each of the first and second exit portions. The first and second exit portions respectively have first and second curved surfaces each having a convex cross section perpendicular to the long axis direction. The second exit portion is connected to the first exit portion in the direction perpendicular to the long axis direction. The reflecting portion is provided, in a plane facing the first exit portion and the second exit portion, at a position shifted in the direction perpendicular to the long axis direction from a position where a normal to the plane passes through a connection portion between the first and second exit portions.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: December 25, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akiko Fujiuchi, Hironobu Arimoto, Taku Matsuzawa
  • Publication number: 20180203178
    Abstract: A light guide includes a first exit portion emitting first exiting light, a second exit portion emitting second exiting light in a different direction than the first exiting light, and a reflecting portion reflecting light entering the light guide to each of the first and second exit portions. The first and second exit portions respectively have first and second curved surfaces each having a convex cross section perpendicular to the long axis direction. The second exit portion is connected to the first exit portion in the direction perpendicular to the long axis direction. The reflecting portion is provided, in a plane facing the first exit portion and the second exit portion, at a position shifted in the direction perpendicular to the long axis direction from a position where a normal to the plane passes through a connection portion between the first and second exit portions.
    Type: Application
    Filed: March 14, 2018
    Publication date: July 19, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akiko FUJIUCHI, Hironobu ARIMOTO, Taku MATSUZAWA
  • Patent number: 10027846
    Abstract: A light guide body (2) includes a light guide main body (21), a band region (4), and radial microstructures (5). The light guide main body (21) is columnar, and light enters the light guide main body (21) from at least one end portion (3). The band region (4) is formed extending in the lengthwise direction of a portion of a circumferential surface of the light guide main body (21). The radial microstructures (5) are arranged in the band region (4) and are formed as microstructures that each have protruding parts extending radially in at least three directions in a band region portion from a reference point.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: July 17, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumika Oshiyama, Taku Matsuzawa, Toru Aramaki
  • Patent number: 9946009
    Abstract: A light guide includes a first exit portion emitting first exiting light, a second exit portion emitting second exiting light in a different direction than the first exiting light, and a reflecting portion reflecting light entering the light guide to each of the first and second exit portions. The first and second exit portions respectively have first and second curved surfaces each having a convex cross section perpendicular to the long axis direction. The second exit portion is connected to the first exit portion in the direction perpendicular to the long axis direction. The reflecting portion is provided, in a plane facing the first exit portion and the second exit portion, at a position shifted in the direction perpendicular to the long axis direction from a position where a normal to the plane passes through a connection portion between the first and second exit portions.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: April 17, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akiko Fujiuchi, Hironobu Arimoto, Taku Matsuzawa
  • Patent number: 9894233
    Abstract: A lighting apparatus includes a first illumination portion and a second illumination portion. The first illumination portion and the second illumination portion respectively include a bar-like light guide whose shape of an end face of an end portion includes a part of a circle, an ellipse or a parabola, and light source elements that are provided to face the end face of the end portion of the light guide. In the light guide of the second illumination portion, light enters a determined range in which a focus of the shape of the end face of the end portion of the light guide is included. In the light guide of the first illumination portion, light enters a range that is not the determined range in which the focus of the shape of the end face of the light guide is included.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: February 13, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taku Matsuzawa, Akiko Fujiuchi, Toshiaki Shoji
  • Publication number: 20180041661
    Abstract: A light guide body (2) includes a light guide main body (21), a band region (4), and radial microstructures (5). The light guide main body (21) is columnar, and light enters the light guide main body (21) from at least one end portion (3). The band region (4) is formed extending in the lengthwise direction of a portion of a circumferential surface of the light guide main body (21). The radial microstructures (5) are arranged in the band region (4) and are formed as microstructures that each have protruding parts extending radially in at least three directions in a band region portion from a reference point.
    Type: Application
    Filed: February 19, 2016
    Publication date: February 8, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumika OSHIYAMA, Taku MATSUZAWA, Toru ARAMAKI
  • Patent number: 9841549
    Abstract: A light guide includes a first exit portion emitting first exiting light, a second exit portion emitting second exiting light in a different direction than the first exiting light, and a reflecting portion reflecting light entering the light guide to each of the first and second exit portions. The first and second exit portions respectively have first and second curved surfaces each having a convex cross section perpendicular to the long axis direction. The second exit portion is connected to the first exit portion in the direction perpendicular to the long axis direction. The reflecting portion is provided, in a plane facing the first exit portion and the second exit portion, at a position shifted in the direction perpendicular to the long axis direction from a position where a normal to the plane passes through a connection portion between the first and second exit portions.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: December 12, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akiko Fujiuchi, Hironobu Arimoto, Taku Matsuzawa
  • Patent number: 9641714
    Abstract: A light guide including a light scattering portion that reflects light guided inside the light guide, and a light emitting surface portion emitting light reflected by the light scattering portion to outside the light guide. A light emitting surface portion includes first and second light emitting surface portions, the first light emitting surface portion has a longer circumferential length than that of the second light emitting surface portion in the transversal cross section, and circumference curvature of the first light emitting surface portion in the transversal cross section increases away from the second light emitting surface portion. A normal line to the light scattering portion, passing through the center of the light scattering portion in the transversal cross section, intersects with the first light emitting surface portion, at a point at a near side to the second light emitting surface portion in the transversal cross section.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: May 2, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Taku Matsuzawa, Kosaku Yamagata, Tadashi Minobe, Yasuhiro Nakamura, Hiroyuki Kawano
  • Publication number: 20170085738
    Abstract: A lighting apparatus includes a first illumination portion and a second illumination portion. The first illumination portion and the second illumination portion respectively include a bar-like light guide whose shape of an end face of an end portion includes a part of a circle, an ellipse or a parabola, and light source elements that are provided to face the end face of the end portion of the light guide. In the light guide of the second illumination portion, light enters a determined range in which a focus of the shape of the end face of the end portion of the light guide is included. In the light guide of the first illumination portion, light enters a range that is not the determined range in which the focus of the shape of the end face of the light guide is included.
    Type: Application
    Filed: March 3, 2015
    Publication date: March 23, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Taku MATSUZAWA, Akiko FUJIUCHI, Toshiaki SHOJI
  • Publication number: 20160370532
    Abstract: A light guide includes a first exit portion emitting first exiting light, a second exit portion emitting second exiting light in a different direction than the first exiting light, and a reflecting portion reflecting light entering the light guide to each of the first and second exit portions. The first and second exit portions respectively have first and second curved surfaces each having a convex cross section perpendicular to the long axis direction. The second exit portion is connected to the first exit portion in the direction perpendicular to the long axis direction. The reflecting portion is provided, in a plane facing the first exit portion and the second exit portion, at a position shifted in the direction perpendicular to the long axis direction from a position where a normal to the plane passes through a connection portion between the first and second exit portions.
    Type: Application
    Filed: August 30, 2016
    Publication date: December 22, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akiko FUJIUCHI, Hironobu ARIMOTO, Taku MATSUZAWA
  • Patent number: 9462150
    Abstract: An image reader configured to read an image of an object-to-be-read includes: a board, a line sensor assembly including a plurality of photosensitive elements formed on one surface of the board along a main scanning direction, a lens array assembly including a plurality of lenses arrayed along the main scanning direction, and configured to focus the reflected light onto the line sensor assembly, a light shield configured to support a portion of the lens array assembly at the line-sensor-assembly side or to be in contact with the portion of the lens array assembly at the line-sensor-assembly side, and to block light other than the light focused by the lens array assembly, and a transparent member made of transparent material, formed with a retainer space where the lens array assembly and the light shield are retained, and covering a portion of the lens array assembly at the object-to-be-read side and the light shield.
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: October 4, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taku Matsuzawa, Akira Ota, Daisuke Ohama, Hajime Nakajima, Hiroyuki Kawano, Sadaaki Yoshioka
  • Patent number: 9385150
    Abstract: An image sensor and image sensor device include: a lighting portion extending in a main scanning direction and emitting light to the object-to-be-read; a rod lens array for imaging light from the object-to-be-read; and a light receiving portion for converting the light imaged by the rod lens array to an electric signal. The lighting portion emits a normally directed light from the normal direction of the object-to-be-read to irradiate a first irradiation region of the object-to-be-read, and an inclined light inclined by a predetermined angle from the normal direction of the object-to-be-read to irradiate a second irradiation region being apart from the first irradiation region in a sub-scanning direction.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: July 5, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Ota, Taku Matsuzawa
  • Patent number: 9264572
    Abstract: An image reading device including: concave first lens mirrors that are arranged in an array shape along a main scanning direction and that collimate scattered light reflected by an irradiated object and reflect the scattered light as a substantially parallel bundle of rays that are angled in a sub-scanning direction; planar mirrors that reflect light from the first lens mirrors; apertures that are arranged in an array shape and that allow light from the planar mirrors to pass through by way of openings that are arranged in an array shape and that are light-shielded therearound for selectively allowing light to pass through; concave second lens mirrors that are arranged in an array shape into which light from the apertures is incident and that reflect the light from the apertures as converged light; and light receivers that have light receiving areas on which light from the second lens mirrors is incident and that form images that correspond to light from the openings.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: February 16, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tadashi Minobe, Takahito Nakanishi, Seiichi Matsumura, Tetsuo Funakura, Hiroyuki Kawano, Tatsuki Okamoto, Taku Matsuzawa, Yasunori Matsumoto
  • Publication number: 20160014294
    Abstract: A light guide including a light scattering portion that reflects light guided inside the light guide, and a light emitting surface portion emitting light reflected by the light scattering portion to outside the light guide. A light emitting surface portion includes first and second light emitting surface portions, the first light emitting surface portion has a longer circumferential length than that of the second light emitting surface portion in the transversal cross section, and circumference curvature of the first light emitting surface portion in the transversal cross section increases away from the second light emitting surface portion. A normal line to the light scattering portion, passing through the center of the light scattering portion in the transversal cross section, intersects with the first light emitting surface portion, at a point at a near side to the second light emitting surface portion in the transversal cross section.
    Type: Application
    Filed: February 14, 2014
    Publication date: January 14, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Taku MATSUZAWA, Kosaku YAMAGATA, Tadashi MINOBE, Yasuhiro NAKAMURA, Hiroyuki KAWANO
  • Publication number: 20150319329
    Abstract: An image reader configured to read an image of an object-to-be-read includes: a board, a line sensor assembly including a plurality of photosensitive elements formed on one surface of the board along a main scanning direction, a lens array assembly including a plurality of lenses arrayed along the main scanning direction, and configured to focus the reflected light onto the line sensor assembly, a light shield configured to support a portion of the lens array assembly at the line-sensor-assembly side or to be in contact with the portion of the lens array assembly at the line-sensor-assembly side, and to block light other than the light focused by the lens array assembly, and a transparent member made of transparent material, formed with a retainer space where the lens array assembly and the light shield are retained, and covering a portion of the lens array assembly at the object-to-be-read side and the light shield.
    Type: Application
    Filed: November 28, 2013
    Publication date: November 5, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Taku MATSUZAWA, Akira OTA, Daisuke OHAMA, Hajime NAKAJIMA, Hiroyuki KAWANO, Sadaaki YOSHIOKA
  • Publication number: 20150316706
    Abstract: A light guide includes a first exit portion emitting first exiting light, a second exit portion emitting second exiting light in a different direction than the first exiting light, and a reflecting portion reflecting light entering the light guide to each of the first and second exit portions. The first and second exit portions respectively have first and second curved surfaces each having a convex cross section perpendicular to the long axis direction. The second exit portion is connected to the first exit portion in the direction perpendicular to the long axis direction. The reflecting portion is provided, in a plane facing the first exit portion and the second exit portion, at a position shifted in the direction perpendicular to the long axis direction from a position where a normal to the plane passes through a connection portion between the first and second exit portions.
    Type: Application
    Filed: December 13, 2013
    Publication date: November 5, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akiko FUJIUCHI, Hironobu ARIMOTO, Taku MATSUZAWA
  • Patent number: 9167121
    Abstract: A lighting unit is provided with: LED arrays in which light-emitting elements are positioned in an array in a main scanning direction; cylindrical parabolic mirrors that project light emitted from the LED arrays on an illumination region of an illuminated item; and a housing that houses or holds the LED arrays and the cylindrical parabolic mirrors. Each cylindrical parabolic mirror forms a shape in which a cylindrical paraboloid having curvature with respect to a sub-scanning direction has been clipped by an axial plane that is perpendicular to the vertex of the cylindrical paraboloid in the main scanning direction. The LED arrays are positioned so as to include the focal position of the cylindrical paraboloid in the light-emitting region, the central axis in the light-emitting direction being perpendicular to the axial plane.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: October 20, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuki Okamoto, Taku Matsuzawa, Tadashi Minobe, Takahito Nakanishi