Patents by Inventor Masayasu Ito

Masayasu Ito 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: 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
  • Patent number: 9512284
    Abstract: To provide a novel fumaric acid diester-cinnamic acid ester-based copolymer having a high molecular weight, which is expected to maintain excellent strength or ensures excellent toughness even when formed into a film, a method for efficiently producing the copolymer, and a film using the same. The fumaric acid diester-cinnamic acid ester-based copolymer contains a fumaric acid diester residue unit, a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6, and a residue unit of a polyfunctional monomer having two or more radical polymerizable functional groups.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: December 6, 2016
    Assignee: TOSOH CORPORATION
    Inventors: Takahiro Kitagawa, Tohru Doi, Yasuyoshi Fujii, Kota Sakaguchi, Akira Inui, Masayasu Ito
  • 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
  • Patent number: 9386646
    Abstract: There is provided a driving device which is used together with a light source including a plurality of light emitting units connected in series to configure a vehicle lamp. The driving device includes a current source which is configure to supply a drive current to the light source, and N bypass circuits which are provided in parallel to N light emitting units, respectively. Each of the bypass circuits includes a bypass transistor which is provided in parallel to a corresponding light emitting unit, a feedback capacitor which is provided between a gate and a drain of the bypass transistor, and a gate drive circuit which is configured to supply a drive voltage between the gate and a source of the bypass transistor according to a control signal.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: July 5, 2016
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Masayasu Ito, Takao Muramatsu, Syouhei Yanagidu
  • Publication number: 20160115333
    Abstract: A resin composition including from 30 to 99 wt % of a cellulose-based resin represented by the following formula (1) and from 70 to 1 wt % of a fumaric acid ester polymer containing 30 mol % or more of a fumaric acid diester residue unit represented by the following formula (2); an optical compensation film using the same; and a production method of the optical compensation film. (wherein R1 to R3 represent a substituent having a carbon number of 1 to 12, and R4 and R5 represent an alkyl group having a carbon number of 1 to 12).
    Type: Application
    Filed: June 4, 2014
    Publication date: April 28, 2016
    Applicant: TOSOH CORPORATION
    Inventors: Masayasu ITO, Shinsuke TOYOMASU, Takahiro KITAGAWA
  • Patent number: 9320107
    Abstract: The present disclosure provides a vehicular lamp including bypass circuits parallel to light emitting devices to precisely cope with an abnormality of the bypass circuit side. The vehicular lamp includes: one or more bypass units connected in parallel to at least a part of a plurality of light emitting devices to form a bypass route of the emission driving current so that the light emitting device is turned OFF according to a bypass control signal, or to cut off the bypass route; abnormality detecting units configured to generate state signals each of which indicates an normal state or an abnormal state of each of the bypass units; and a control unit configured to control the formation of the bypass route. When the generated state signal indicates that each of the bypass units is abnormal, supply of the emission driving current from the light source power supply is reduced or stopped.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: April 19, 2016
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Toda Takeshi, Takao Muramatsu, Tsuchiya Toshiyuki, Masayasu Ito
  • Publication number: 20160070308
    Abstract: A portable electronic device 100 includes a horizontally long casing, both ends of which are gripped by a user's both hands, respectively. The device further includes a LCD fit into the front face of the casing 10. Outwardly projecting bulges are respectively formed at both sides of the rear face of the casing where fingers of the user gripping the casing 10 placed. Since the fingers and palms are naturally flexed to fit to the dome-like bulges 42L, 42R, the portable electronic device 100 fits comfortably in the user's hands. The operability is hard to be degraded even if the device is vibrated strongly during a game play with the device.
    Type: Application
    Filed: November 3, 2015
    Publication date: March 10, 2016
    Inventors: Shinichi OGASAWARA, Masayasu ITO, Hajime ISHIHARA, Nobutoshi HAMADA, Shuuichi MIYAZAKI
  • Patent number: 9265109
    Abstract: A semiconductor light source control device includes a driver circuit, which generates a drive current Iout flowing through a plurality of LEDs connected in series and which performs control such that the amount of the drive current is brought close to a target value, and bypass switches, which are on-off controlled by a control signal, the bypass switches being connected in parallel with the corresponding LEDs. The semiconductor light source control device is configured such that when the control signal indicates the off-state of the bypass switches, a voltage across the corresponding LEDs is clamped at an upper limit by using the bypass switches.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: February 16, 2016
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Takao Muramatsu, Masayasu Ito, Kazuki Saito
  • Patent number: 9226349
    Abstract: A semiconductor light source lighting circuit is provided with: a switching regulator that generates a drive current of a semiconductor light source using a switching element; and a control circuit that controls ON/OFF of the switching element. The control circuit is provided with: a comparator that compares the drive current and a target value; a counter that counts a digital value in a count direction determined by a comparison result of the comparator; a digital-analog converter that converts the digital value into an analog signal; and a drive circuit that controls the ON/OFF of the switching element based on the analog signal. The counter counts the digital value at a speed determined by an ON/OFF cycle of the switching element.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: December 29, 2015
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Satoshi Kikuchi, Takanori Namba, Masayasu Ito
  • Patent number: 9207718
    Abstract: A portable electronic device 100 includes a horizontally long casing, both ends of which are gripped by a user's both hands, respectively. The device further includes a LCD fit into the front face of the casing 10. Outwardly projecting bulges are respectively formed at both sides of the rear face of the casing where fingers of the user gripping the casing 10 placed. Since the fingers and palms are naturally flexed to fit to the dome-like bulges 42L, 42R, the portable electronic device 100 fits comfortably in the user's hands. The operability is hard to be degraded even if the device is vibrated strongly during a game play with the device.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: December 8, 2015
    Assignees: SONY CORPORATION, SONY COMPUTER ENTERTAINMENT INC.
    Inventors: Shinichi Ogasawara, Masayasu Ito, Hajime Ishihara, Nobutoshi Hamada, Shuuichi Miyazaki
  • Patent number: 9198247
    Abstract: A current controller 42 compares a first coil current IL1 flowing in an output inductor L1 with a first upper threshold value and a first lower threshold value. A current limiter 44 compares a second coil current IL2 flowing in an input inductor L2 with a second upper threshold value and a second lower threshold value. A duty controller 46 (i) switches a switching transistor M1 based on the first coil current in a cycle where the first coil current IL1 exceeds the first upper threshold value before the second coil current IL2, exceeds the second upper threshold value. According to the current controller 42, it is possible to stabilize an output current and to limit a current.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: November 24, 2015
    Assignee: KOITO MANUFACTURING CO., LTD.
    Inventors: Masayasu Ito, Takao Muramatsu, Syouhei Yanagizu
  • Publication number: 20150291751
    Abstract: To provide a novel fumaric acid diester-cinnamic acid ester-based copolymer having a high molecular weight, which is expected to maintain excellent strength or ensures excellent toughness even when formed into a film, a method for efficiently producing the copolymer, and a film using the same. The fumaric acid diester-cinnamic acid ester-based copolymer contains a fumaric acid diester residue unit, a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6, and a residue unit of a polyfunctional monomer having two or more radical polymerizable functional groups.
    Type: Application
    Filed: November 25, 2013
    Publication date: October 15, 2015
    Applicant: TOSOH CORPORATION
    Inventors: Takahiro Kitagawa, Tohru Doi, Yasuyoshi Fujii, Kota Sakaguchi, Akira Inui, Masayasu Ito
  • Publication number: 20150264754
    Abstract: There is provided a driving device which is used together with a light source including a plurality of light emitting units connected in series to configure a vehicle lamp. The driving device includes a current source which is configure to supply a drive current to the light source, and N bypass circuits which are provided in parallel to N light emitting units, respectively. Each of the bypass circuits includes a bypass transistor which is provided in parallel to a corresponding light emitting unit, a feedback capacitor which is provided between a gate and a drain of the bypass transistor, and a gate drive circuit which is configured to supply a drive voltage between the gate and a source of the bypass transistor according to a control signal.
    Type: Application
    Filed: March 13, 2015
    Publication date: September 17, 2015
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Masayasu ITO, Takao MURAMATSU, Syouhei YANAGIDU
  • Publication number: 20150230302
    Abstract: A current controller 42 compares a first coil current IL1 flowing in an output inductor L1 with a first upper threshold value and a first lower threshold value. A current limiter 44 compares a second coil current IL2 flowing in an input inductor L2 with a second upper threshold value and a second lower threshold value. A duty controller 46 (i) switches a switching transistor M1 based on the first coil current in a cycle where the first coil current IL1 exceeds the first upper threshold value before the second coil current IL2, exceeds the second upper threshold value. According to the current controller 42, it is possible to stabilize an output current and to limit a current.
    Type: Application
    Filed: February 12, 2015
    Publication date: August 13, 2015
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Masayasu ITO, Takao MURAMATSU, Syouhei YANAGIZU
  • Publication number: 20150208476
    Abstract: A semiconductor light source control device includes a driver circuit, which generates a drive current Iout flowing through a plurality of LEDs connected in series and which performs control such that the amount of the drive current is brought close to a target value, and bypass switches, which are on-off controlled by a control signal, the bypass switches being connected in parallel with the corresponding LEDs. The semiconductor light source control device is configured such that when the control signal indicates the off-state of the bypass switches, a voltage across the corresponding LEDs is clamped at an upper limit by using the bypass switches.
    Type: Application
    Filed: May 10, 2013
    Publication date: July 23, 2015
    Inventors: Takao Muramatsu, Masayasu Ito, Kazuki Saito
  • Publication number: 20150163871
    Abstract: The present disclosure provides a vehicular lamp including bypass circuits parallel to light emitting devices to precisely cope with an abnormality of the bypass circuit side. The vehicular lamp includes: one or more bypass units connected in parallel to at least a part of a plurality of light emitting devices to form a bypass route of the emission driving current so that the light emitting device is turned OFF according to a bypass control signal, or to cut off the bypass route; abnormality detecting units configured to generate state signals each of which indicates an normal state or an abnormal state of each of the bypass units; and a control unit configured to control the formation of the bypass route. When the generated state signal indicates that each of the bypass units is abnormal, supply of the emission driving current from the light source power supply is reduced or stopped.
    Type: Application
    Filed: December 3, 2014
    Publication date: June 11, 2015
    Inventors: Toda TAKESHI, Takao MURAMATSU, Tsuchiya TOSHIYUKI, Masayasu ITO
  • Patent number: 8994287
    Abstract: Disclosed is a light source control device including a power conversion unit and a control unit. The power conversion unit includes a transfer capacitor provided between a primary side circuit and a secondary side circuit. The primary side circuit is configured such that a first inductor stores energy when a first switching element is ON. The secondary side circuit is configured such that the second inductor limits a changing speed of the driving current. The power conversion unit is configured such that the driving current is raised when the first switching element is ON. The control unit turns OFF when the magnitude of the driving current exceeds the first threshold value, and turns ON the first switching element when the magnitude of the driving current falls below the second threshold value smaller than the first threshold value.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: March 31, 2015
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Masayasu Ito, Takao Muramatsu
  • Patent number: 8985824
    Abstract: An automotive lamp is provided with: a lamp chamber formed so as to include a lamp body having a front end opening portion and a translucent cover provided on the lamp body so as to cover the front end opening portion; a lamp unit that is housed inside the lamp chamber and includes a semiconductor light emitting device as a light source; a bracket that includes a light source mounting portion having a mounting surface for the semiconductor light emitting device and a plurality of radiating fins, thermally in contact with the light source mounting portion and arranged such that ventilation passages extend from the lamp body side toward the translucent cover, are formed, and that supports the lamp unit; and a fan that blows air such that air flows through the ventilation passages from the lamp body side toward the translucent cover.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: March 24, 2015
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Masayasu Ito, Tsukasa Tokida
  • Patent number: 8970136
    Abstract: A semiconductor light source lighting circuit includes a voltage step-down unit configured to generate a drive voltage lower than an input voltage by turning on or off a first switching element in a voltage step-down mode, a voltage step-up unit configured to generate the drive voltage higher than the input voltage by turning on or off a second switching element in a voltage step-up mode, and a controller. The controller includes a charge pump unit configured to repeat charging from the drive voltage to a second capacitor and discharging from the charged second capacitor to the first capacitor in the voltage step-up mode, and a switch drive unit configured to apply a voltage higher than the voltage at the other end of the first switching element to the control terminal of the first switching element by using a voltage of the charged first capacitor.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: March 3, 2015
    Assignee: Panasonic Corporation
    Inventors: Satoshi Kikuchi, Takanori Namba, Masayasu Ito, Daijiro Arisawa, Mikio Motomori
  • Patent number: 8947017
    Abstract: A circuit for lighting a semiconductor light source is provided. The circuit includes: a switching regulator including a switching element and configured to generate a drive current for the semiconductor light source using the switching element; and a control circuit configured to control on-off of the switching element such that the magnitude of the drive current comes close to a targeted value. The control circuit includes: a comparator configured to compare the magnitude of the drive current with the targeted value; an up/down counter configured to count a digital value in a counting-up direction or counting-down direction, based on a comparison result of the comparator; a digital-to-analog converter configured to convert the counted digital value into an analog signal; and a drive circuit configured to control on/off of the switching element based on the analog signal.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: February 3, 2015
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Satoshi Kikuchi, Fuminori Shiotsu, Takanori Namba, Masayasu Ito