Patents Assigned to Mitsumi Electric Co., Ltd.
  • Publication number: 20210058537
    Abstract: A camera actuator comprises: a fixed-side member; a movable-side member disposed separated from the fixed-side member in a direction orthogonal to a light axis, the movable-side member holding a lens unit; a first lens drive actuator that displaces the movable-side member in at least a prescribed direction; an elastic support member that extends in the direction orthogonal to the light axis, and supports the movable-side member in relation to the fixed-side member so as to allow the displacement in at least the prescribed direction; and a gel-like first damping member provided to the elastic support member.
    Type: Application
    Filed: February 1, 2019
    Publication date: February 25, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Masahiro SAITO
  • Publication number: 20210048361
    Abstract: A pressure sensor device of the present invention includes a first board including external connection terminals, a second board stacked on an upper surface of the first board and including a first through hole and a second through hole, a pressure sensor element including a diaphragm structure and mounted on an upper surface of the second board such that the first through hole is closed by the diaphragm structure, and a cover that is mounted on the upper surface of the second board to cover the pressure sensor element and in which a first channel for guiding a first fluid to an upper surface of the diaphragm structure is formed. A second channel is formed between the first board and the second board to lead from the second through hole to the first through hole and guide a second fluid to a lower surface of the diaphragm structure.
    Type: Application
    Filed: February 7, 2019
    Publication date: February 18, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Soichiro SUZU
  • Publication number: 20210050655
    Abstract: Disclosed is an antenna device that includes a capacitor element, a first coil, a second coil, and a capacitor. One end of the first coil is connected to a feeding point and another end of the first coil is connected to the capacitor element. One end of the second coil is connected to the capacitor element. One end of the capacitor is connected to the second coil and another end of the capacitor is connected to a grounding point.
    Type: Application
    Filed: August 4, 2020
    Publication date: February 18, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Ryutaro MIURA
  • Patent number: 10921581
    Abstract: A scan driving device includes a waveform generator that generates a sawtooth driving waveform having a rise period in which a signal level rises, and a fall period in which the signal level falls, and a driving circuit that drives an optical scanning device, that resonates at a natural resonant frequency thereof, by a sawtooth driving voltage waveform corresponding to the sawtooth driving waveform. A time width of one of the rise period and the fall period is shorter than the other of the rise period and the fall period, and is an integer multiple of an inverse number of the natural resonant frequency.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: February 16, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Yugo Hayashi
  • Patent number: 10924050
    Abstract: A motor control circuit includes a control circuit configured to output a pulse width modulation signal for controlling a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor, and includes a speed-change detecting circuit configured to detect a change in a speed command signal and, output, in response to the change meeting and exceeding a predetermined limit, a signal indicating that the speed command signal has changed to the control circuit to cause the control circuit to change a duty cycle of the pulse width modulation signal, the speed command signal specifying a target value of a rotational speed of the motor.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: February 16, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Makio Abe, Shu Hayashi, Masato Aoki
  • Publication number: 20210034088
    Abstract: A power control semiconductor device includes a voltage control transistor, a control circuit, a bias circuit, and external terminals. The voltage control transistor is connected between a voltage input terminal and an output terminal. The bias circuit generates a voltage that operates the control circuit. Output control signals provided from an outside are input to the external terminals to control an output voltage. The control circuit includes an error amplifier and a logic circuit. The error amplifier outputs a voltage corresponding to a potential difference between a reference voltage and a voltage divided by a voltage divider that divides the output voltage. The logic circuit generates: a signal that changes the divided voltage in accordance with the output control signals; and a signal that stops operation of the bias circuit in response to a combination of the output control signals.
    Type: Application
    Filed: July 2, 2020
    Publication date: February 4, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yoichi TAKANO, Shinichiro MAKI, Katsuhiro YOKOYAMA
  • Patent number: 10908411
    Abstract: An actuator includes a beam that supports an object to be driven, and a driving source that receives a driving signal and causes the object to rotate around a predetermined axis. The driving signal includes a sawtooth driving waveform, and a differential waveform of a falling section of the sawtooth driving waveform is formed of half sign waves having a wavelength that is a non-integral multiple of a ringing wavelength.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: February 2, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Kensuke Yamada
  • Publication number: 20210018946
    Abstract: A power supply control apparatus includes a voltage control transistor connected between a DC voltage input terminal and an output terminal; a control circuit which controls the voltage control transistor according to an output feedback voltage; and a first external terminal receiving an output control signal to control an output voltage. The control circuit includes a first error amplifier outputting a voltage according to an electric potential difference between a voltage divided by a first voltage dividing circuit which divides the output voltage of the output terminal and a predetermined reference voltage; and an output changing circuit including a second error amplifier receiving a voltage input in the first external terminal, a transistor having a control terminal receiving the output of the second error amplifier, and a current mirror circuit connected to the voltage input terminal which transfers an electric current flowing in the transistor.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 21, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Shinichiro MAKI, Yoichi TAKANO, Katsuhiro YOKOYAMA
  • Publication number: 20210018947
    Abstract: A power supply control apparatus includes a voltage control transistor connected between a DC voltage input terminal and an output terminal; a control circuit controlling the voltage control transistor according to an output feedback voltage; and a first external terminal receiving an output control signal to control an output voltage. The control circuit includes a first error amplifier outputting a voltage according to an electric potential difference between a voltage divided by a first voltage dividing circuit which divides the output voltage of the output terminal and a predetermined reference voltage; and an output changing circuit including a second error amplifier receiving a voltage input in the first external terminal, a transistor having a control terminal receiving the output of the second error amplifier, and a current mirror circuit connected to the voltage input terminal which transfers an electric current flowing in the transistor.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 21, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Shinichiro MAKI, Yoichi TAKANO, Katsuhiro YOKOYAMA
  • Patent number: 10897221
    Abstract: A motor control circuit includes a control circuit configured to control a switching operation of an inverter circuit, the inverter circuit being configured to supply an alternating current power to a motor, and includes a determination-information generating circuit configured to generate at least one determination value that conveys information on whether the motor malfunctions or deteriorates. The motor control circuit includes a determination circuit configured to determine whether the motor malfunctions or deteriorates based on the determination value to output, as an interrupt signal, a signal indicating that the motor malfunctions or deteriorates to the control circuit.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: January 19, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Makio Abe, Takatoshi Itagaki, Shu Hayashi, Masato Aoki
  • Patent number: 10890781
    Abstract: A lens driving device includes two pairs of an image-stabilization coil part and an image-stabilization magnet part disposed along a first side and a second side that are adjacent to each other, respectively. An autofocus movable part is disposed eccentrically with respect to a central axis along the direction of the optical axis. An image-stabilization fixed part includes connection terminal parts that are respectively disposed on the first side and the second side, and are connected to power supply wiring of the image-stabilization coil part.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: January 12, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yulin Zhang, Masayoshi Sugawara
  • Patent number: 10890756
    Abstract: An optical scanning device includes: a pair of twist beams arranged on both sides of a mirror along a predetermined axis and configured to swing the mirror around the axis; a pair of connection beams connected to the respective twist beams; a piezoelectric sensor formed on the connection beams and configured to detect a displacement of the connection beams caused by a swing of the mirror around the axis; wherein the piezoelectric sensor includes a lower electrode; a piezoelectric thin film stacked on the lower electrode; and an upper electrode stacked on or above the piezoelectric thin film, wherein a bottom surface and a side surface of the piezoelectric thin film form a tilt angle ?, and wherein the tilt angle is greater than 0° and less than or equal to 50°.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: January 12, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yasuyuki Sudo, Takahiro Wakasugi
  • Publication number: 20210003840
    Abstract: A light scanning apparatus includes a light source configured to intermittently emit light based on an irradiation timing signal; a mirror configured to reflect the light emitted by the light source; an actuator configured to cause the mirror to be deflected based on drive signals; a sensor configured to output a signal according to deflection of the mirror; an irradiation timing adjusting-unit configured to adjust the irradiation timing signal based on the output signal of the sensor; and an irradiation timing storage configured to store the adjusted irradiation timing signal.
    Type: Application
    Filed: June 24, 2020
    Publication date: January 7, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuji KIMURA, Takayuki KUROKAWA
  • Publication number: 20210003812
    Abstract: The lens driving device includes: an AF movable part; an AF fixing part disposed spaced apart from the autofocus movable part; an AF driving section that moves the AF movable part in an optical-axis direction with respect to the AF fixing part; an OIS movable part that includes the AF movable part, the AF fixing part and the AF driving section; an OIS fixing part disposed spaced apart from the OIS movable part; and an OIS driving section that sways the OIS movable part in a plane orthogonal to the optical-axis direction with respect to the OIS fixing part. The AF movable part includes a first position detection magnet and the OIS fixing part includes a hall element provided facing the first position detection magnet in the optical-axis direction.
    Type: Application
    Filed: September 17, 2020
    Publication date: January 7, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Masayoshi SUGAWARA
  • Publication number: 20210006720
    Abstract: An actuator is provided with: the fixed part being formed by arranging either a coil part or a magnet part on a base member on the external peripheral side of the driven part; a movable part having a frame-like holding member for arranging and holding the other of the coil part or the magnet part on the base-member-side surface on the external peripheral side of the driven part; and a support part for inclinably supporting the movable part in relation to the fixed part, the support part being disposed on the base member. The holding member has, on the surface on the opposite side from the base member and farther inward than the arrangement area of either the coil part or the magnet part, a mounting surface part on which a first capturing module and a second capturing module are mounted as driven parts.
    Type: Application
    Filed: July 27, 2017
    Publication date: January 7, 2021
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Yohei ENTA
  • Patent number: 10886828
    Abstract: A vibration actuator includes: a fixing part including one of a coil and a magnet; a movable part including the other one of the coil and the magnet; and an elastic supporting part configured to support the movable part movably with respect to the fixing part. The movable part is configured to reciprocate with respect to the fixing part in a vibration direction through cooperation between the powered coil and the magnet. The magnet is disposed away from and radially inside the coil. The elastic supporting part has a plate-like shape in which one end of the elastic supporting part is fixed to the fixing part at the side of the movable part and the other end is fixed to the movable part, and cantilevers the movable part in such a manner that the movable part can reciprocate in the vibration direction.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: January 5, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuki Takahashi, Kazutaka Sakaguchi, Yasutaka Kitamura, Shigeyuki Shimomura, Yuki Ogihara
  • Patent number: 10886838
    Abstract: Disclosed is a semiconductor integrated circuit for discharging, which includes: a plurality of discharging elements; a plurality of external terminals connected respectively to first terminals of the plurality of discharging elements; and a controlling external terminal which is capable of receiving from an outside a signal indicating that an operation of an internal circuit is enabled/disabled. In response to the signal received at the controlling external terminal or an output signal of a logic circuit that receives the signal being applied to controlling terminals of the plurality of discharging elements, the discharging semiconductor integrated circuit turns on the plurality of discharging elements to draw charges respectively through the plurality of external terminals.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: January 5, 2021
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Chuhei Terada, Yoichi Takano
  • Publication number: 20200412138
    Abstract: A secondary battery protection apparatus includes a plurality of secondary battery protection apparatuses. One of two adjacent secondary battery protection apparatuses includes a voltage determination unit that is not affected by a current transfer signal and configured to receive, through a single communication line, the current transfer signal that is transmitted from the other of the two adjacent battery protection apparatuses through the single communication line and an information element based on changes of a voltage value of a voltage transfer signal, and a current determination unit that is not affected by the voltage transfer signal and configured to receive, through the single communication line, the voltage transfer signal that is transmitted from the other of the two adjacent secondary battery protection apparatuses through the single communication line and an information element based on changes of the current value of the current transfer signal.
    Type: Application
    Filed: September 10, 2020
    Publication date: December 31, 2020
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Kohei SHIBATA
  • Patent number: 10880461
    Abstract: Provided are a lens driving device, a camera module, and a camera-mounted device for which the miniaturization and weight reduction can be achieved and the reliability can also be improved. The lens driving device includes auto-focusing and shake-correcting driving parts utilizing a voice coil motor. An autofocus movable part includes a lens holder adapted to hold a lens part and an auto-focusing coil part, an autofocus fixing part includes a magnet holder adapted to hold an auto-focusing magnet part, and a shake-correcting fixing part includes a base to which a shake-correcting coil part is disposed. At least one of the lens holder, magnet holder, and base is formed from a molding material consisting of polyarylate (PAR) or a PAR alloy which is a mixture of multiple resin materials including polyarylate.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: December 29, 2020
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Tomohiko Osaka, Takashi Ishizawa, Atsushi Kikuchi, Minoru Katagiri
  • Patent number: 10866408
    Abstract: An optical scanning device includes: a mirror that has an optical reflection surface; a mirror support unit configured to support the mirror; a pair of drive beams arranged on both sides of the mirror support unit and connected such that the mirror support unit is swingable; a drive source provided on the drive beams and configured to swing the mirror support unit, the drive source including a stack structure of a plurality of piezoelectric thin films; and a piezoelectric sensor formed on a connection beam connected to the drive source or the drive beams, a number of piezoelectric thin films included in the piezoelectric sensor being less than a number of the piezoelectric thin films included in the drive source.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: December 15, 2020
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Hisamichi Sekine, Maiko Nagawatari, Seiya Sato