Patents by Inventor Takashi Ohsawa

Takashi Ohsawa 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: 10513217
    Abstract: A control unit of an optical axis control device for a headlight calculates a first vehicle angle (??) and a second vehicle angle (??) at different timings in traveling of a vehicle, and calculates a third vehicle angle (?s) at which a difference between acceleration signals in a front-rear direction (?X) is zero. The control unit calculates a representative value (?S) based on a distribution of a plurality of third vehicle angles (?s), and generates a signal for operating an optical axis of the headlight based on the representative value (?S).
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: December 24, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takashi Ohsawa, Wataru Tsujita
  • Patent number: 10471885
    Abstract: A headlight optical axis control apparatus calculates an inclination angle of a vehicle with respect to a road surface from a ratio of a difference between acceleration signals in the front-and-rear direction measured at two time points (kn, kn+1) to a difference between acceleration signals in the up-and-down direction measured at the two time points (kn, kn+1), the two time points being in the vicinity of a time when the attitude of a vehicle body becomes equivalent to a stationary state, in a period from a time when the travelling vehicle stops to a time when the vehicle body comes to a halt.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: November 12, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takashi Ohsawa, Wataru Tsujita
  • Patent number: 10471884
    Abstract: In a headlight optical-axis control device 10, a controller 15 is configured to: calculate vehicle angles indicating tilt angles of a vehicle relative to a road surface, on the basis of ratios, each being a ratio of a difference between a reference acceleration in a longitudinal direction and a signal indicating an acceleration in the longitudinal direction detected during traveling of the vehicle, to a difference between a reference acceleration in a perpendicular direction and a signal indicating an acceleration in the perpendicular direction detected during traveling of the vehicle by an acceleration sensor 2; calculate a plot of the calculated vehicle angles thereby to derive a vehicle angle corresponding to a case where a change of the acceleration in the longitudinal direction is zero; and generate a signal for controlling the optical axes of headlights 5L and 5R on the basis of the derived vehicle angle.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: November 12, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuaki Akaza, Toshiyuki Yamashita, Takashi Ohsawa, Wataru Tsujita, Takahiko Ito
  • Patent number: 10400976
    Abstract: In a light source for headlight, the light emitting element is arranged to be displaced from an optical axis of the projection lens part. The reflection surface part is in a shape of a concave mirror having an optical axis and one focal point on the optical axis. An optical center which is an intersection of the reflection surface part and the optical axis of the reflection surface part is arranged on the optical axis of the projection lens part and between the projection lens part and a focal point of the projection lens part. The optical axis of the reflection surface part is oriented in a direction passing a position between a central part of a light emitting surface of the light emitting element and a central part of the projection lens part.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: September 3, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Muneharu Kuwata, Takashi Ohsawa
  • Patent number: 10246010
    Abstract: An ultrasonic sensor (10) includes a transmission and reception unit (11) for transmitting and receiving an ultrasonic wave, a holder (12) and an attachment (13) for fixing the transmission and reception unit (11) to the bumper (1) of a vehicle, and light source units (14a, 14b) mounted in a back side of the bumper (1). The holder (12) is shaped so as to be exposed on a surface of the bumper (1), and guides light beams emitted by the light source units (14a, 14b) to the surface of the bumper (1), to project the light beams from a light projecting surface (12a) to the outside of the vehicle.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: April 2, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoru Inoue, Takashi Ohsawa, Masato Kurahashi
  • Publication number: 20190003675
    Abstract: In a light source for headlight, the light emitting element is arranged to be displaced from an optical axis of the projection lens part. The reflection surface part is in a shape of a concave mirror having an optical axis and one focal point on the optical axis. An optical center which is an intersection of the reflection surface part and the optical axis of the reflection surface part is arranged on the optical axis of the projection lens part and between the projection lens part and a focal point of the projection lens part. The optical axis of the reflection surface part is oriented in a direction passing a position between a central part of a light emitting surface of the light emitting element and a central part of the projection lens part.
    Type: Application
    Filed: October 13, 2015
    Publication date: January 3, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Muneharu KUWATA, Takashi OHSAWA
  • Publication number: 20180257540
    Abstract: A headlight optical axis control apparatus calculates an inclination angle of a vehicle with respect to a road surface from a ratio of a difference between acceleration signals in the front-and-rear direction measured at two time points (kn, kn+1) to a difference between acceleration signals in the up-and-down direction measured at the two time points (kn, kn+1), the two time points being in the vicinity of a time when the attitude of a vehicle body becomes equivalent to a stationary state, in a period from a time when the travelling vehicle stops to a time when the vehicle body comes to a halt.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 13, 2018
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takashi OHSAWA, Wataru TSUJITA
  • Publication number: 20180222382
    Abstract: An ultrasonic sensor (10) includes a transmission and reception unit (11) for transmitting and receiving an ultrasonic wave, a holder (12) and an attachment (13) for fixing the transmission and reception unit (11) to the bumper (1) of a vehicle, and light source units (14a, 14b) mounted in a back side of the bumper (1). The holder (12) is shaped so as to be exposed on a surface of the bumper (1), and guides light beams emitted by the light source units (14a, 14b) to the surface of the bumper (1), to project the light beams from a light projecting surface (12a) to the outside of the vehicle.
    Type: Application
    Filed: August 31, 2015
    Publication date: August 9, 2018
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoru INOUE, Takashi OHSAWA, Masato KURAHASHI
  • Patent number: 9928891
    Abstract: One end of a current path of a second field-effect transistor is connected to a gate of a first field-effect transistor. One end of a magnetic tunnel junction element is connected to one end of a current path of the first field-effect transistor. A first control terminal is connected to another end of the current path of the first field-effect transistor. A second control terminal is connected to another end of the magnetic tunnel junction element. A third control terminal is connected to another end of the current path of the second field-effect transistor.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: March 27, 2018
    Assignee: Tohoku University
    Inventors: Takashi Ohsawa, Tetsuo Endoh
  • Publication number: 20180065539
    Abstract: A control unit of an optical axis control device for a headlight calculates a first vehicle angle (??) and a second vehicle angle (??) at different timings in traveling of a vehicle, and calculates a third vehicle angle (?s) at which a difference between acceleration signals in a front-rear direction (?X) is zero. The control unit calculates a representative value (?S) based on a distribution of a plurality of third vehicle angles (?s), and generates a signal for operating an optical axis of the headlight based on the representative value (?S).
    Type: Application
    Filed: May 27, 2015
    Publication date: March 8, 2018
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takashi OHSAWA, Wataru TSUJITA
  • Patent number: 9803821
    Abstract: A vehicle-mounted headlamp using an LED includes a projector lens projecting the LED light to the vehicle front. A light distribution member forming a low-beam lamp light distribution includes: a first incident surface through which the LED light emitted frontward enters; a first reflecting surface disposed on an optical axis such that a projector lens side edge overlaps an LED side focus of the projector lens; a second incident surface and a second reflecting surface disposed on an upper side of the optical axis such that the LED light emitted upward enters through the second incident surface and is reflected frontward by the second reflecting surface; and a third incident surface and a third reflecting surface disposed on the upper side of the optical axis such that the LED light emitted downward enters through the third incident surface and is reflected frontward by the third reflecting surface.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: October 31, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shuichi Iha, Takashi Ohsawa
  • Patent number: 9740255
    Abstract: A memory cell (101) is connected to a word line (WL), a bit line (BL), and a power supply line (PL), and includes a flip-flop storing data based on a change in resistance value of a magnetic tunnel junction element, and, a power gating field-effect transistor including a drain that is one end of a current path connected to the power supply line, and which has another end connected to the flip-flop. The ON and OFF states of the power gating field-effect transistor are controlled based on a control signal applied to a control terminal of the power gating field-effect transistor.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: August 22, 2017
    Assignee: Tohoku University
    Inventors: Takashi Ohsawa, Tetsuo Endoh
  • Publication number: 20170129390
    Abstract: In a headlight optical-axis control device 10, a controller 15 is configured to: calculate vehicle angles indicating tilt angles of a vehicle relative to a road surface, on the basis of ratios, each being a ratio of a difference between a reference acceleration in a longitudinal direction and a signal indicating an acceleration in the longitudinal direction detected during traveling of the vehicle, to a difference between a reference acceleration in a perpendicular direction and a signal indicating an acceleration in the perpendicular direction detected during traveling of the vehicle by an acceleration sensor 2; calculate a plot of the calculated vehicle angles thereby to derive a vehicle angle corresponding to a case where a change of the acceleration in the longitudinal direction is zero; and generate a signal for controlling the optical axes of headlights 5L and 5R on the basis of the derived vehicle angle.
    Type: Application
    Filed: September 16, 2014
    Publication date: May 11, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuaki AKAZA, Toshiyuki YAMASHITA, Takashi OHSAWA, Wataru TSUJITA, Takahiko ITO
  • Patent number: 9633708
    Abstract: A memory circuit (100) includes a plurality of memory cells (50), an N-type MOSFET (30a) and an N-type MOSFET (30b). The drain of the N-type MOSFET (30a) is connected to one of a pair of bit lines, and the drain of the N-type MOSFET (30b) is connected to the other of the pair of bit lines. The gate of the N-type MOSFET (30a) is connected to the drain of the N-type MOSFET (30b), and the gate of the N-type MOSFET (30b) is connected to the drain of the N-type MOSFET (30a).
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: April 25, 2017
    Assignee: Tohoku University
    Inventors: Takashi Ohsawa, Tetsuo Endoh
  • Patent number: 9608526
    Abstract: A DC/DC converter 1 is configured to allow separation of a primary side constitution unit 3 and a secondary side constitution unit 4 of a transformer 2. A secondary side switching element FET 2 is provided in the secondary side constitution unit 4, and controls power supply to a load 12 by intermitting an output of a secondary winding L2. The primary side constitution unit 3 detects an electrical behavior of the primary side generated by the intermittent operation of the secondary side, and controls the power supplied from the primary winding L1 to the secondary winding L2 by operating the intermittent operation of the primary side switching element FET 1 such that a cycle or duty of the intermittent operation of the secondary side falls within a predetermined range.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: March 28, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Susumu Okura, Takashi Ohsawa
  • Patent number: 9587795
    Abstract: In a headlight for in-vehicle use, an LED serving as an optical source is provided in which one edge side of its light-emitting face is formed into a linear portion and placed at a side of an optical axis so that the center of the light-emitting face is displaced from the optical axis. A projection lens is constituted by a radiation-side convex lens and an LED-side convex lens that are arranged in a direction of the optical axis. Between the LED and the projection lens, a light distribution member is placed that is formed using a transparent material and has, on its inner surface, a reflection face for reflecting light emitted by the LED.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: March 7, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Ohsawa, Masato Kurahashi, Fumihiro Minami
  • Publication number: 20160372174
    Abstract: A memory circuit (100) includes a plurality of memory cells (50), an N-type MOSFET (30a) and an N-type MOSFET (30b). The drain of the N-type MOSFET (30a) is connected to one of a pair of bit lines, and the drain of the N-type MOSFET (30b) is connected to the other of the pair of bit lines. The gate of the N-type MOSFET (30a) is connected to the drain of the N-type MOSFET (30b), and the gate of the N-type MOSFET (30b) is connected to the drain of the N-type MOSFET (30a).
    Type: Application
    Filed: December 3, 2014
    Publication date: December 22, 2016
    Applicant: Tohoku University
    Inventors: Takashi Ohsawa, Tetsuo Endoh
  • Publication number: 20160341386
    Abstract: A vehicle-mounted headlamp using an LED includes a projector lens projecting the LED light to the vehicle front. A light distribution member forming a low-beam lamp light distribution includes: a first incident surface through which the LED light emitted frontward enters; a first reflecting surface disposed on an optical axis such that a projector lens side edge overlaps an LED side focus of the projector lens; a second incident surface and a second reflecting surface disposed on an upper side of the optical axis such that the LED light emitted upward enters through the second incident surface and is reflected frontward by the second reflecting surface; and a third incident surface and a third reflecting surface disposed on the upper side of the optical axis such that the LED light emitted downward enters through the third incident surface and is reflected frontward by the third reflecting surface.
    Type: Application
    Filed: January 17, 2014
    Publication date: November 24, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shuichi IHA, Takashi OHSAWA
  • Patent number: 9466363
    Abstract: An integrated circuit that does not involve increase in power consumption or decrease in switching probability during a write operation that occur when a latch circuit using STT-MTJ device, etc. of the prior art is operated at high speed is provided. The integrated circuit 1 includes: a memory element 1B where write occurs when a specified period ? has elapsed after a write signal is input; and a basic circuit element 1A, which is an elementary device constituting a circuit and has a data retaining function, and characterized in that an operation frequency f1 in a first operation mode in the process of memory access of the basic circuit element 1A satisfies the following relation: ?>?1/f1(0<?1?1).
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: October 11, 2016
    Assignee: TOHOKU UNIVERSITY
    Inventors: Tetsuo Endoh, Takashi Ohsawa, Hiroki Koike, Takahiro Hanyu, Hideo Ohno
  • Publication number: 20160224082
    Abstract: A memory cell (101) is connected to a word line (WL), a bit line (BL), and a power supply line (PL), and includes a flip-flop storing data based on a change in resistance value of a magnetic tunnel junction element, and, a power gating field-effect transistor including a drain that is one end of a current path connected to the power supply line, and which has another end connected to the flip-flop. The ON and OFF states of the power gating field-effect transistor are controlled based on a control signal applied to a control terminal of the power gating field-effect transistor.
    Type: Application
    Filed: September 18, 2014
    Publication date: August 4, 2016
    Inventors: Takashi Ohsawa, Tetsuo Endoh