Patents by Inventor Kazunori Natsume

Kazunori Natsume 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: 9835305
    Abstract: A vehicular lamp includes a light source; and a light guide disposed such that light emitted from the light source is incident on an end face of the light guide. The light guide emits light, guided into its interior, heading vehicle-forward from an exit face of the light guide running along the light guide's lengthwise extension. The light guide includes reflection steps formed on a surface of the light guide on a side reverse from the exit face, for reflecting light guided into the light-guide interior toward the exit face; and a plurality of diffusion flutes formed on said end face, each being arcuate in substantially horizontal cross-section through said end face, and each being of constant form in substantially perpendicular extension.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: December 5, 2017
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Kazunori Natsume, Takahiro Totsuka, Takayuki Suzuki
  • Publication number: 20160084468
    Abstract: A vehicular lamp includes a light source; and a light guide disposed such that light emitted from the light source is incident on an end face of the light guide. The light guide emits light, guided into its interior, heading vehicle-forward from an exit face of the light guide running along the light guide's lengthwise extension. The light guide includes reflection steps formed on a surface of the light guide on a side reverse from the exit face, for reflecting light guided into the light-guide interior toward the exit face; and a plurality of diffusion flutes formed on said end face, each being arcuate in substantially horizontal cross-section through said end face, and each being of constant form in substantially perpendicular extension.
    Type: Application
    Filed: December 7, 2015
    Publication date: March 24, 2016
    Inventors: Kazunori NATSUME, Takahiro TOTSUKA, Takayuki SUZUKI
  • Patent number: 9039261
    Abstract: The present disclosure provides a vehicular lamp including a low-beam lamp and a daytime running lamp. The low-beam lamp includes a low-beam LED, a low-beam reflector, and a projection lens. The daytime running lamp includes a DRL LED, and a DRL reflector. The DRL LED is disposed at the rear side of the low-beam reflector to emit a light in a direction which intersects with the optical axis of the vehicular lamp. The DRL reflector includes an extension area that extends to at least the outer side of the projection lens when viewed from the front, and reflects the light from the DRL LED in the extension area to emit the light to the front side of the lamp through the outer side of the projection lens.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: May 26, 2015
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Hideko Fujiu, Asami Nakada, Kazuhisa Sakashita, Ryujiro Ikuta, Kazunori Natsume
  • Patent number: 8950915
    Abstract: A vehicle lamp includes a light guide extending in a first direction intersecting a front-rear direction of the lamp, a light source arranged to input light into the light guide from an end face of the light guide, and a reflector arranged behind the light guide to extend in the first direction. Reflecting elements on a rear surface portion of the light guide internally reflect the light toward a front surface portion of the light guide. The reflector has a first reflecting portion disposed behind the reflecting elements and a second reflecting portion disposed adjacent to the first reflecting portion in a second direction intersecting the first direction. The first reflecting portion reflects a portion of the light that has leaked rearward from the reflecting elements, and the second reflecting portion forwardly reflects the portion of the light that has been reflected by the first reflecting portion.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: February 10, 2015
    Assignee: Koito Manufacturing Co., Ltd.
    Inventor: Kazunori Natsume
  • Patent number: 8882316
    Abstract: A linear light guide or light guides disposed in a lamp chamber have a light guide neighboring region, in which the portions close to light incidence end portions are close to each other, and a light-emitting portion or portions are disposed so as to be offset from a luminous region of a light source unit and to have portions that extend from the light guide neighboring region and separate from each other. A translucent diffusion cover that covers the light guide neighboring region is provided at least in front of the light guide neighboring region. Part of the light from the light guide neighboring region is diffused by the diffusion cover and then emitted through the diffusion cover, so that light emitted through the light-emitting portion and the diffusion cover is continuous, so that it appears as if the light guide that is continuous is emitting light.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: November 11, 2014
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Kazunori Natsume, Hajime Arai
  • Patent number: 8708538
    Abstract: A vehicle lamp includes a plurality of light sources, and a light guide plate configured to emit light to the front side of the lamp from a second surface facing a first surface by internally reflecting light, which is emitted from the respective light sources, by a plurality of reflective elements formed on the first surface after causing the light to enter the light guide plate from a rear end face of the light guide plate. The light guide plate is curved to the first surface and gradually becomes thinner toward the front side. The reflective elements are disposed at a predetermined interval in a longitudinal direction and extend in a direction crossing the longitudinal direction.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: April 29, 2014
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Kazunori Natsume, Hiroya Koizumi
  • Patent number: 8674595
    Abstract: Provided is a vehicular lamp including a planar light source. The planar light source made of a flexible band-type light-emitting material is provided within a lamp chamber formed between a housing and a transparent cover. The band-type light-emitting material of the planar light source is bent along a longitudinal direction such that a first light-emitting surface faces the rear side of the vehicle and a second light-emitting surface faces the lateral side of the vehicle. In particular, the first and second light-emitting surfaces are alternately formed in parallel in the planar light source, and the angle formed between the first and second light-emitting surfaces is set to be obtuse such that light from one light-emitting surface is not incident to other light-emitting surface. An organic EL formed by sealing an organic light-emitting layer using a flexile transparent resin is used as the band-type light-emitting material.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: March 18, 2014
    Assignee: Koito Manufacturing Co., Ltd.
    Inventor: Kazunori Natsume
  • Patent number: 8591083
    Abstract: A vehicular lamp includes: a light-emitting element arranged face forward; and a translucent member arranged to cover the light-emitting element from its front side. The member has a horizontally oblong shape in a front view, and includes: a direct light control portion located near the optical axis and directly emitting light forward from a front surface of the member; reflected light control portions located both sides of the direct light control portion and internally reflecting the entered light on a rear surface of the member to form substantially parallel light directed forward and emitting the light forward from the front surface; and a curved-surface light incident area formed on the rear surface to allow light from the light-emitting element to enter as substantially parallel light with respect to a cross section parallel to the axis and a longitudinal direction of the member in the direction perpendicular to the cross section.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: November 26, 2013
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Hiroya Koizumi, Kazunori Natsume
  • Publication number: 20130272009
    Abstract: The present disclosure provides a vehicular lamp including a low-beam lamp and a daytime running lamp. The low-beam lamp includes a low-beam LED, a low-beam reflector, and a projection lens. The daytime running lamp includes a DRL LED, and a DRL reflector. The DRL LED is disposed at the rear side of the low-beam reflector to emit a light in a direction which intersects with the optical axis of the vehicular lamp. The DRL reflector includes an extension area that extends to at least the outer side of the projection lens when viewed from the front, and reflects the light from the DRL LED in the extension area to emit the light to the front side of the lamp through the outer side of the projection lens.
    Type: Application
    Filed: April 4, 2013
    Publication date: October 17, 2013
    Applicant: Koito Manufacturing Co., Ltd.
    Inventors: Hideko FUJIU, Asami NAKADA, Kazuhisa SAKASHITA, Ryujiro IKUTA, Kazunori NATSUME
  • Publication number: 20130201709
    Abstract: A vehicle lamp includes a light guide extending in a first direction intersecting a front-rear direction of the lamp, a light source arranged to input light into the light guide from an end face of the light guide, and a reflector arranged behind the light guide to extend in the first direction. Reflecting elements on a rear surface portion of the light guide internally reflect the light toward a front surface portion of the light guide. The reflector has a first reflecting portion disposed behind the reflecting elements and a second reflecting portion disposed adjacent to the first reflecting portion in a second direction intersecting the first direction. The first reflecting portion reflects a portion of the light that has leaked rearward from the reflecting elements, and the second reflecting portion forwardly reflects the portion of the light that has been reflected by the first reflecting portion.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 8, 2013
    Inventor: Kazunori Natsume
  • Patent number: 8485704
    Abstract: A lamp unit includes at least one light source that emits light in a predetermined direction, and a light guide body including at least one incident surface where light emitted from the light source enters, a first emission surface that emits light entering from the incident surface in a horizontal direction, and a plurality of second emission surfaces that emits light entering the incident surface in a horizontal direction and emits light entering the incident surface to the upper side of the horizontal direction. The second emission surfaces are formed above the first emission surface at different positions in an up-down direction, and are positioned on the back side of the first emission surface so as to be spaced apart from one another in the horizontal direction.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: July 16, 2013
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Hiroya Koizumi, Asami Nakada, Kazunori Natsume
  • Patent number: 8469564
    Abstract: A vehicular lamp includes a light source; a light guide that guides the light from the light source; and a reflector. The light guide includes an incident portion to which light from the light source is incident, wherein light entering from the incident portion is guided through the light guide; and a plurality of reflection portions that internally reflect a portion of the guided light toward the reflector. The reflector reflects, in a lamp illumination direction, reflection light that is emitted from the light guide following internal reflection by the plurality of reflection portions.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: June 25, 2013
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Asami Nakada, Kazunori Natsume
  • Publication number: 20130049570
    Abstract: Provided is a vehicular lamp including a planar light source. The planar light source made of a flexible band-type light-emitting material is provided within a lamp chamber formed between a housing and a transparent cover. The band-type light-emitting material of the planar light source is bent along a longitudinal direction such that a first light-emitting surface faces the rear side of the vehicle and a second light-emitting surface faces the lateral side of the vehicle. In particular, the first and second light-emitting surfaces are alternately formed in parallel in the planar light source, and the angle formed between the first and second light-emitting surfaces is set to be obtuse such that light from one light-emitting surface is not incident to other light-emitting surface. An organic EL formed by sealing an organic light-emitting layer using a flexile transparent resin is used as the band-type light-emitting material.
    Type: Application
    Filed: August 8, 2012
    Publication date: February 28, 2013
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventor: Kazunori NATSUME
  • Publication number: 20130010486
    Abstract: A vehicle lamp includes a plurality of light sources, and a light guide plate configured to emit light to the front side of the lamp from a second surface facing a first surface by internally reflecting light, which is emitted from the respective light sources, by a plurality of reflective elements formed on the first surface after causing the light to enter the light guide plate from a rear end face of the light guide plate. The light guide plate is curved to the first surface and gradually becomes thinner toward the front side. The reflective elements are disposed at a predetermined interval in a longitudinal direction and extend in a direction crossing the longitudinal direction.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 10, 2013
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Kazunori Natsume, Hiroya Koizumi
  • Publication number: 20120069592
    Abstract: A linear light guide or light guides disposed in a lamp chamber have a light guide neighboring region, in which the portions close to light incidence end portions are close to each other, and a light-emitting portion or portions are disposed so as to be offset from a luminous region of a light source unit and to have portions that extend from the light guide neighboring region and separate from each other. A translucent diffusion cover that covers the light guide neighboring region is provided at least in front of the light guide neighboring region. Part of the light from the light guide neighboring region is diffused by the diffusion cover and then emitted through the diffusion cover, so that light emitted through the light-emitting portion and the diffusion cover is continuous, so that it appears as if the light guide that is continuous is emitting light.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 22, 2012
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Kazunori NATSUME, Hajime ARAI
  • Publication number: 20110249462
    Abstract: A vehicular lamp includes: a light-emitting element arranged face forward; and a translucent member arranged to cover the light-emitting element from its front side. The member has a horizontally oblong shape in a front view, and includes: a direct light control portion located near the optical axis and directly emitting light forward from a front surface of the member; reflected light control portions located both sides of the direct light control portion and internally reflecting the entered light on a rear surface of the member to form substantially parallel light directed forward and emitting the light forward from the front surface; and a curved-surface light incident area formed on the rear surface to allow light from the light-emitting element to enter as substantially parallel light with respect to a cross section parallel to the axis and a longitudinal direction of the member in the direction perpendicular to the cross section.
    Type: Application
    Filed: April 11, 2011
    Publication date: October 13, 2011
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Hiroya KOIZUMI, Kazunori Natsume
  • Publication number: 20110176324
    Abstract: A vehicular lamp includes a housing covered by a translucent cover so as to form a lamp chamber. A main light source and a sub light source are disposed inside the lamp chamber. The sub light source includes a planar light-emitting body. The planar light-emitting body is arranged in an area off to a side of a light path of the main light source.
    Type: Application
    Filed: January 19, 2011
    Publication date: July 21, 2011
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventor: Kazunori Natsume
  • Publication number: 20110128750
    Abstract: A vehicular lamp includes a light source; a light guide that guides the light from the light source; and a reflector. The light guide includes an incident portion to which light from the light source is incident, wherein light entering from the incident portion is guided through the light guide; and a plurality of reflection portions that internally reflect a portion of the guided light toward the reflector. The reflector reflects, in a lamp illumination direction, reflection light that is emitted from the light guide following internal reflection by the plurality of reflection portions.
    Type: Application
    Filed: November 22, 2010
    Publication date: June 2, 2011
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Asami Nakada, Kazunori Natsume
  • Patent number: 7946743
    Abstract: A vehicle lamp assembly includes a first lamp section and a second lamp section, which are disposed inside a lamp chamber defined by a lamp body and a front cover. The first lamp section includes a light source and a reflector which reflects light from the light source. The second lamp section includes a first light emitting device, a second light emitting device, a light guide member, and an optical component. The light guide member includes a base end face from which the light guide member extends in a strip shape along the front cover, a functional portion having a diffusing front surface which emits light from a first light emitting device, and a decorative portion having an internally reflecting rear surface which reflects light from a second light emitting device. A light emitting area of the decorative portion is larger than that of the functional portion.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: May 24, 2011
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Kazunori Natsume, Kenji Nobuhara
  • Publication number: 20110085344
    Abstract: A lamp unit includes at least one light source that emits light in a predetermined direction, and a light guide body including at least one incident surface where light emitted from the light source enters, a first emission surface that emits light entering from the incident surface in a horizontal direction, and a plurality of second emission surfaces that emits light entering the incident surface in a horizontal direction and emits light entering the incident surface to the upper side of the horizontal direction. The second emission surfaces are formed above the first emission surface at different positions in an up-down direction, and are positioned on the back side of the first emission surface so as to be spaced apart from one another in the horizontal direction.
    Type: Application
    Filed: September 20, 2010
    Publication date: April 14, 2011
    Applicant: Koito Manufacturing Co., Ltd.
    Inventors: Hiroya Koizumi, Asami Nakada, Kazunori Natsume