Patents by Inventor Yuta Maruyama

Yuta Maruyama 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: 10807516
    Abstract: A lighting circuit drives a light source including N (N represents an integer of 2 or more) multiple light-emitting elements coupled in series. A bypass switch circuit includes N multiple bypass switches, each coupled in parallel to a corresponding light-emitting element. A constant current driving circuit supplies a driving current stabilized to a target current to the light source. A light distribution controller controls the bypass switch circuit. For a given light distribution pattern, the duty ratio Di(%) is determined for each of the N multiple light-emitting elements. Multiple light-emitting elements are formed as control units having a sum total of duty ratios that is less than 100%. The light distribution controller controls the multiple bypass switches such that the multiple light-emitting elements included in the same control unit are not turned on at the same time.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: October 20, 2020
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Yuta Maruyama, Kentarou Murakami, Takao Muramatsu
  • Publication number: 20200238892
    Abstract: A vehicle lamp includes a first lamp unit that includes a light source, a driving unit, and a reflective body that is driven by the driving unit to repeat a periodic motion and thus scans an exit beam from the light source; and a controlling unit that controls the first lamp unit. The controlling unit instructs that the driving unit be driven until a first duration T1 has passed even in a case where the controlling unit has received an illumination instruction instructing the first lamp unit to emit a beam and then received a stop instruction instructing the first lamp unit to stop emitting a beam.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Yuta MARUYAMA, Naoki KAWABATA, Kentarou MURAKAMI
  • Publication number: 20190202344
    Abstract: A lighting circuit drives a light source including N (N represents an integer of 2 or more) multiple light-emitting elements coupled in series. A bypass switch circuit includes N multiple bypass switches, each coupled in parallel to a corresponding light-emitting element. A constant current driving circuit supplies a driving current stabilized to a target current to the light source. A light distribution controller controls the bypass switch circuit. For a given light distribution pattern, the duty ratio Di(%) is determined for each of the N multiple light-emitting elements. Multiple light-emitting elements are formed as control units having a sum total of duty ratios that is less than 100%. The light distribution controller controls the multiple bypass switches such that the multiple light-emitting elements included in the same control unit are not turned on at the same time.
    Type: Application
    Filed: March 8, 2019
    Publication date: July 4, 2019
    Applicant: Koito Manufacturing Co., Ltd.
    Inventors: Yuta MARUYAMA, Kentarou MURAKAMI, Takao MURAMATSU
  • Patent number: 9598000
    Abstract: A vehicle lamp system includes a camera which generates image information in a front region, a controller which generates a light distribution command for instructing a light distribution pattern based on the image information, a headlight which irradiates the front region such that the instructed light distribution pattern is obtained, and a position calibrator which detects a positional deviation between the camera and the headlight. The position calibrator detects a reference object based on the image information and measures a luminance of the reference object, and when there is a certain difference between a luminance of the reference object obtained from one light distribution pattern and a luminance of the reference object obtained from another light distribution pattern in which a light quantity of only a part is different from the one light distribution pattern, detects the positional deviation using a position of the part.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: March 21, 2017
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Masayasu Ito, Takao Muramatsu, Yuta Maruyama
  • Publication number: 20160264042
    Abstract: A vehicle lamp system includes a camera which generates image information in a front region, a controller which generates a light distribution command for instructing a light distribution pattern based on the image information, a headlight which irradiates the front region such that the instructed light distribution pattern is obtained, and a position calibrator which detects a positional deviation between the camera and the headlight. The position calibrator detects a reference object based on the image information and measures a luminance of the reference object, and when there is a certain difference between a luminance of the reference object obtained from one light distribution pattern and a luminance of the reference object obtained from another light distribution pattern in which a light quantity of only a part is different from the one light distribution pattern, detects the positional deviation using a position of the part.
    Type: Application
    Filed: March 11, 2016
    Publication date: September 15, 2016
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Masayasu Ito, Takao Muramatsu, Yuta Maruyama
  • Publication number: 20140307456
    Abstract: A vehicle lamp includes a light distribution pattern control unit, a swivel control unit, a leveling control unit, and an ADB control device. The light distribution pattern control unit changes and controls a light distribution pattern of the lamp. The swivel control unit deflects and controls a lamp optical axis in right and left directions. The leveling control unit controls the lamp optical axis in up and down directions. The ADB control device drives and controls the light distribution pattern control unit, the swivel control unit, and the leveling control unit. The ADB control device is configured so that an actuator of the swivel control unit, an actuator of the leveling control unit, and drive circuit sections that drive the light distribution pattern control unit, the swivel control unit, and the leveling control unit, respectively can be incorporated therein individually.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 16, 2014
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Tetsuya Ishida, Kazuhiro Suzuki, Yuta Maruyama