Patents Assigned to Koito Manufacturing Co., Ltd.
  • Patent number: 10415779
    Abstract: An ADB lamp unit of a vehicle headlamp includes a light source constituted by a plurality of semiconductor light-emitting elements that can be turned on/off individually, and a reflector having a reflective surface that is based on a paraboloid of revolution. The reflector is constituted by a perpendicularly split plurality of partial reflectors, with the reflective surface of each partial reflector being configured such that the horizontal spread of reflected light reflected by each partial reflectors is approximately equal in a predetermined projection plane.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: September 17, 2019
    Assignee: KOITO MANUFACTURING CO. LTD.
    Inventors: Noriko Sato, Hiroyuki Ishida
  • Patent number: 10420196
    Abstract: A lighting circuit for a light source includes a drive circuit that supplies a lamp current to the light source, detects the lamp current, and executes feedback control such that the lamp current approaches a target current, and an overcurrent protection circuit that is inserted between the drive circuit and the light source and that restricts the lamp current flowing into the light source so that the lamp current does not exceed an overcurrent threshold value. The overcurrent protection circuit includes a transistor, an inductor, a rectifier, a current sensor that generates a current detection signal according to the lamp current, and an overcurrent protection controller that controls ON/OFF of the transistor based on the current detection signal and the overcurrent threshold value. The transistor, the inductor and the rectifier are disposed in a T-shape.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: September 17, 2019
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventor: Tomoyuki Ichikawa
  • Patent number: 10418591
    Abstract: Provided is a light emitting device disposed along a transparent member. The light emitting device includes: an organic electroluminescence panel having a translucent substrate disposed to face the transparent member, a translucent anode disposed on the substrate, an organic material layer disposed on the anode, and a non-translucent cathode disposed on the organic material layer. The organic material layer and the cathode are formed in a form of stripes. The cathode is formed wider than the organic material layer.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: September 17, 2019
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Tomoaki Harada, Masaya Shido, Yoshiro Ito
  • Publication number: 20190275923
    Abstract: A left front camera (11) is adapted to be mounted on a left front lamp (1LF) of a vehicle to obtain external information of at least ahead of the vehicle. A right front LiDAR sensor (12), a type of which is different from the camera (11), is adapted to be mounted on a right front lamp (1RF) of the vehicle to obtain external information of at least ahead of the vehicle.
    Type: Application
    Filed: September 14, 2017
    Publication date: September 12, 2019
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Yoshiaki FUSHIMI, Takashi HORI, Teruaki YAMAMOTO, Yusuke KASABA
  • Publication number: 20190277469
    Abstract: A vehicular lamp includes a two-dimensional image forming device configured to form a contrast image from light emitted by a light source; and a projection optical system configured to project the contrast image forward. The two-dimensional image forming device includes an image-forming performance decreasing portion configured to decrease image-forming performance of forming a part of the projected contrast image.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventor: Takayuki YAGI
  • Publication number: 20190274209
    Abstract: A first light source illuminates a first region. A second light source is configured to provide lower luminance than that of the first light source. The second light source illuminates a second region that overlaps the first region, and that has a larger area than that of the first region. A lighting circuit drives the first light source and the second light source according to a common lighting instruction. The lighting circuit gradually turns on the first light source and the second light source with different gradual changing time periods in response to the lighting instruction.
    Type: Application
    Filed: May 20, 2019
    Publication date: September 5, 2019
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Tomoyuki ICHIKAWA, Masayasu ITO, Naoki TATARA, Satoshi Yamamura
  • Patent number: 10403771
    Abstract: A sintered compact includes a wavelength conversion region containing a phosphor material that performs wavelength conversion of primary light and emits secondary light, and a holding region provided to be in contact with the wavelength conversion region. The wavelength conversion region and the holding region are integrated.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: September 3, 2019
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Akihiro Nomura, Hidemichi Sone, Yuzo Maeno, Yukihiro Onoda
  • Patent number: 10399481
    Abstract: A vehicle lamp system includes a high-beam lamp unit that can form a high-beam light-distribution pattern, a leveling mechanism that vertically adjusts an optical axis of the high-beam lamp unit, and a control unit that controls on/off of the high-beam lamp unit and controls the leveling mechanism. Upon the engine being started, the control unit controls the high-beam lamp unit to turn on for a predetermined period of time in a state in which the leveling unit adjusts the optical axis of the lamp unit to aim more vertically downward than in normal operation.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: September 3, 2019
    Assignees: Koito Manufacturing Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kiyotaka Mochizuki, Atsushi Uesugi, Hideki Uchida, Tatsuya Takagaki, Takatoshi Nakagawa
  • Patent number: 10400982
    Abstract: A light source module has a heat radiating member that has heat radiating properties and has a through-hole penetrating therethrough, a heat generating component having a heat generating component main body disposed on a side of a first opening of the through-hole, and a pin terminal connected to the heat generating component main body and inserted through the through-hole, an electrically conductive member disposed on a side of a second opening of the through-hole and connected to the pin terminal protruding from the second opening, and a covering material that covers and fixes at least a portion of the electrically conductive member and the heat radiating member. A connection portion of the electrically conductive member with the pin terminal is not covered by the covering material.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 3, 2019
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Tetsuya Suzuki, Yukihiro Onoda
  • Patent number: 10391936
    Abstract: A first photosensor is sensitive to the wavelength of excitation light, insensitive to the wavelength of fluorescent light, and receives a portion of the output light to generate a first current corresponding to the amount of light received. A second photosensor is sensitive to the fluorescent light wavelength, insensitive to excitation light wavelength, and receives a portion of the output light to generate a second current corresponding to the received light amount. A first current/voltage conversion circuit outputs a first detection voltage corresponding to the voltage drop across a first resistor. A second current/voltage conversion circuit outputs a second detection voltage corresponding to the voltage drop across a second resistor. If (i) a relation between the magnitudes of the first detection voltage and the second detection voltage has reversed, or (ii) if the first detection voltage deviates from a normal voltage range, a judgment unit asserts an abnormality detection signal.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: August 27, 2019
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventor: Tomoyuki Ichikawa
  • Patent number: 10393337
    Abstract: Provided is a vehicular headlamp including: a first light source that emits a first light serving as a low beam; a second light source that emits a second light serving as a high beam; a projection lens that transmits the first light and the second light; a third light source that emits a third light in response to at least one of an operation of a steering and an operation of a direction indicator; and an optical member that adjusts a light distribution of the third light. The first light source, the second light source, and the third light source share a single heat sink.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: August 27, 2019
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Shuhei Nozue, Akira Hanada, Takaya Shimizu
  • Patent number: 10393339
    Abstract: Disclosed is a vehicle head lamp includes: a plurality of lamps arranged in parallel with each other and each including a light source that emits light irradiated to a forward and a heat sink that radiates heat generated from the light source; a blower; and a lamp housing configured to accommodate the plurality of lamps and the blower. Each of the plurality of lamps includes a first lamp disposed in a blowing direction where air is blown by the blower, and a second lamp disposed on a flow path of the air flowing through the first lamp. The blower includes an air suction space into which the air flowing through the second lamp is sucked.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: August 27, 2019
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Shingo Kato, Daisuke Aizawa
  • Patent number: 10391930
    Abstract: A vehicular lamp includes a light guide body configured with a two-color molded article of a light-transmitting member and a non-translucent member, and a light source configured to introduce light to the translucent member. The light guide body has a curved portion. The translucent member has a reflective step formed on a first surface thereof, which is in contact with the non-translucent member, so as to emit the light of the light source from a second surface, which is opposite the first surface. The second surface is exposed to an outside of a vehicle body on which the vehicular lamp is mounted.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: August 27, 2019
    Assignee: Koito Manufacturing Co., Ltd.
    Inventor: Shigehiko Kazaoka
  • Patent number: 10393335
    Abstract: A vehicle headlamp includes a surface light source and a reflector that forms a low beam light distribution pattern having an oblique cut-off line and a horizontal cut-off line. The surface light source is provided in a perpendicular direction with respect to an optical axis of the reflector, and the reflector forms a hot zone of the light distribution pattern by first areas with a great disposition angle and second areas with a small disposition angle where a light source image of the surface light source becomes narrow and small.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: August 27, 2019
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Hiroyuki Makino, Takeshi Horiba
  • Publication number: 20190257492
    Abstract: A vehicle lamp includes a light source, and a projection lens which is configured to project light emitted from the light source. The projection lens includes two or more resin lenses and one or more glass lenses, and a refractive power ratio R (=Pr/Pt) of a total refractive power Pr of the resin lenses to a refractive power Pt of the entire projection lens satisfies a relationship of R<1/3.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 22, 2019
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventor: Kazuya MOTOHASHI
  • Publication number: 20190257494
    Abstract: A vehicle lamp includes a projection lens, and a light source disposed behind the projection lens. The vehicle lamp is configured to form a required light distribution pattern by irradiating light emitted from the light source forward through the projection lens. A movable lens configured to be movable in a required direction intersecting with an optical axis of the projection lens is disposed between the projection lens and the light source. A maximum luminous intensity position of the light distribution pattern is changed by moving the movable lens in the required direction.
    Type: Application
    Filed: October 3, 2017
    Publication date: August 22, 2019
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventor: Mitsuyuki Mochizuki
  • Publication number: 20190248276
    Abstract: A vehicle illumination system provided to a vehicle capable of traveling in an autonomous driving mode includes: an illumination unit configured to emit a light pattern toward an outside of the vehicle; and an illumination controller configured to control the illumination unit to irradiate the light pattern to a predetermined position. When the vehicle changes a traffic lane from a first traffic lane to a second traffic lane, the illumination controller: controls the illumination unit to irradiate the light pattern on a road surface between a first other vehicle traveling on the second traffic lane and a second other vehicle which is a following vehicle of the first other vehicle; and changes a length of the light pattern, depending on an interval between the first other vehicle and the second other vehicle.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 15, 2019
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Norihisa Sutou, Masaaki Nakabayashi, Yoshinori Shibata, Ryuho Sato, Naoki Tatara, Akinori Matsumoto, Kiyomi Akachi
  • Publication number: 20190248279
    Abstract: A vehicle illumination system provided to a vehicle capable of traveling in an autonomous driving mode includes: an illumination unit configured to emit light toward an outside of the vehicle; and an illumination controller configured to change an illumination mode of the illumination unit, depending on a waiting time of the vehicle.
    Type: Application
    Filed: February 7, 2019
    Publication date: August 15, 2019
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Naoki Takii, Atsushi Sugimoto, Misako Kamiya
  • Patent number: D857935
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: August 27, 2019
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventor: Keiichi Tajima
  • Patent number: D858811
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: September 3, 2019
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventor: Minami Katagiri