Patents Assigned to Mitsumi Electric Co., Ltd.
  • Patent number: 10439338
    Abstract: A plug with a cable includes a plug and a cable. The plug is connected to a receptacle to which a secondary cell is connected. The plug includes a hosing and a substrate therein. The cable includes a power supply line and a grounding line. The cable has one end connected to the plug and the other end connected to a power supply unit. A switch is mounted on the substrate and provided in series in a power supply interconnection connected to the power supply line. A temperature sensor is mounted on the substrate and disposed near a power supply terminal or a grounding terminal of the plug. A control circuit is mounted on the substrate and configured to interrupt the power supply interconnection by turning off the switch when a temperature detected by the temperature sensor exceeds a predetermined value.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: October 8, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Yoshihiro Motoichi
  • Publication number: 20190302821
    Abstract: A semiconductor apparatus for power supply control includes the following. A voltage control transistor is connected between a voltage input terminal and an output terminal. A control circuit controls the voltage control transistor according to an output feedback voltage. A first external terminal is supplied with an output control signal to control output voltage is input. The control circuit further includes the following. A first error amplifier outputs 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. An output changing circuit displaces the reference voltage input in the first error amplifier or the voltage divided by the first voltage dividing circuit according to a voltage input in the first external terminal to change the output voltage to a voltage according to the output control signal.
    Type: Application
    Filed: March 13, 2019
    Publication date: October 3, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Shinichiro MAKI, Yoichi TAKANO, Katsuhiro YOKOYAMA
  • Publication number: 20190304650
    Abstract: A vibration actuator includes: a fixing body having N-fold (N is a natural number) of 2 of core pole parts and a coil wound around each of the core pole parts; a movable body having a magnet part disposed being separated from each of the core pole parts in an axial direction of each of the core pole parts, for each of the core pole parts; and an elastic support part that movably supports the movable body, in which the magnet part has a magnetic pole disposed on each of the core pole part sides and facing each of the core pole parts, and in which the movable body vibrates in a direction orthogonal to both directions including a direction in which the N-fold of 2 of the core pole parts are aligned and the axial direction of the coil by the energization of the coil.
    Type: Application
    Filed: February 27, 2019
    Publication date: October 3, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuki Takahashi, Tomoya Ishitani
  • Publication number: 20190302447
    Abstract: An actuator includes a torsion beam configured to support a target object, a first drive beam having a first drive source, and a connection beam configured to connect the torsion beam with the first drive beam, and a frame body configured to fix the first drive beam, wherein the actuator applies force of rotating the torsion beam in a direction around a first axis by a resonant drive of the first drive beam so as to cause the target object to swing, and when a structural non-linear constant of the actuator is ? [Nm/rad3] and a spring constant of the actuator is k [Nm/rad], [Equation 1] is satisfied: [Equation 1] ?=0.05×k?A×106??(1), where 3.5?A?15.5.
    Type: Application
    Filed: March 13, 2019
    Publication date: October 3, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Tsukasa YAMADA, Takahiro WAKASUGI
  • Patent number: 10432208
    Abstract: A D/A converter for converting a digital signal with a predetermined number of bits to an analog signal, the D/A converter includes a plurality of component groups that include a plurality of components included in the D/A converter and are connected to an output unit for outputting the analog signal in a predetermined order; and a start position change unit that changes a start position within the plurality of the component groups used for generating a single analog signal by using a predefined shift pattern when generating the single analog signal corresponding to the digital signal.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 1, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Fumihiro Inoue, Akira Mogi
  • Publication number: 20190294026
    Abstract: An auto focus support section (13) of a lens driving device has a support body (41) and a reinforcing section (42). The support body has a fixed end (411) connected to an auto focus fixing section (12), free ends (413) connected to an auto focus movable section (11), and arms (412) connected to the fixed end and the free ends. The arms are made of an elastic material, with two hinge sections (412a, 412b) thinner than surrounding structures and axes orthogonal to the optical axis, that move together with the auto focus movable section towards the optical axis. The arms bend in opposite directions at the two hinge sections. The reinforcing sections are made of a material more rigid than the elastic material of the arms, and are disposed between the two hinge sections of the arms.
    Type: Application
    Filed: May 31, 2016
    Publication date: September 26, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Masayoshi SUGAWARA
  • Publication number: 20190296627
    Abstract: A vibration actuator includes a movable body provided with one of a coil and a magnet that is disposed radially inward of the coil with a gap formed therebetween, a fixing body provided with the other of the coil and the magnet and a shaft portion, and an elastic support portion, the movable body vibrating in a vibration direction by means of cooperation between the coil supplied with power and the magnet. The movable body is provided with a through-hole into which the shaft portion is inserted with a gap formed between the through-hole and an outer peripheral surface of the shaft portion and the elastic support portion supports the movable body such that the movable body does not come into contact with the shaft portion at a time when the movable body does not vibrate and at a time when the movable body vibrates.
    Type: Application
    Filed: February 28, 2019
    Publication date: September 26, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Yuki TAKAHASHI, Chikara SEKIGUCHI, Yuta YOSHII, Daisuke KODAMA, Shigenori INAMOTO
  • Publication number: 20190293925
    Abstract: An actuator including a beam configured to support an object to be driven, and a drive source to which a drive signal is input, wherein the drive signal includes a drive waveform in a shape of sawtooth waveform, a rising of the drive waveform in the shape of sawtooth waveform includes a first staircase waveform and a second staircase waveform continuing from the first staircase waveform, the first staircase waveform generates oscillation of a ringing suppressing waveform for suppressing a ringing waveform to be generated in the second staircase waveform, and the object to be driven is driven to swing in a direction of rotating around the predetermined axis by driving the drive source.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 26, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Kensuke YAMADA
  • Publication number: 20190285874
    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: Application
    Filed: March 8, 2019
    Publication date: September 19, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Kensuke YAMADA
  • Publication number: 20190285873
    Abstract: An actuator includes a driving beam that includes a beam extending in a direction orthogonal to a predetermined axis and supports an object to be driven; a driving source that is formed on a surface of the beam and causes the object to rotate around the predetermined axis; a sensor beam that extends in a direction that is the same as the direction in which the beam extends, one end of the sensor beam being connected to a lateral side of the beam; and a sensor that is formed on a surface of the sensor beam, the surface of the sensor beam and the surface of the beam facing the same direction.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 19, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Kensuke YAMADA
  • Publication number: 20190285876
    Abstract: An optical scanning device includes a mirror support including a first surface and a second surface, a mirror for reflecting a laser beam being formed on the first surface; a driving beam that includes a beam extending in a direction orthogonal to a predetermined axis and is connected to the mirror support; a driving source that is formed on a surface of the beam and causes the mirror support to rotate around the predetermined axis; and a rib formed on the second surface of the mirror support at a position corresponding to the mirror. The first surface of the mirror support includes an area where the mirror is formed and an exposed area where the first surface is exposed.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 19, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Kensuke YAMADA
  • Patent number: 10412279
    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 AF and shake-correcting driving parts utilizing a voice coil motor. An AF fixing part includes an AF control part controlling the energization current through an AF coil part. The AF driving part includes upper and lower elastic supporting parts, auto-focusing power-source lines connected to power-supplying suspension wires functioning as a shake-correcting supporting part, signal lines connected to signal suspension wires functioning as a shake-correcting supporting part, and coil power-supply lines electrically connecting the AF control part to the AF coil part. The upper elastic supporting part functions at least as the AF power-supply lines or the signal lines, and the lower elastic supporting part functions as the coil power-supply lines.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: September 10, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Tomohiko Osaka, Takashi Ishizawa
  • Publication number: 20190271839
    Abstract: An actuator includes a driving beam that includes a beam extending in a direction orthogonal to a predetermined axis and supports an object to be driven, a driving source that is formed on a first surface of the beam and causes the object to rotate around the predetermined axis, and a rib formed on a second surface of the beam. A notch is formed in a portion of the driving source corresponding to an end of the rib.
    Type: Application
    Filed: February 22, 2019
    Publication date: September 5, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Kensuke YAMADA
  • Patent number: 10401589
    Abstract: A lens driving device comprising: an autofocus driving unit in which an autofocus movable part is elastically supported by an autofocus fixed part due to an elastic support part; and an auxiliary magnet which, in a reference position of the autofocus movable part, has a movement direction action force of zero relative to the autofocus movable part and which generates the movement direction action force in the opposite direction to a restoring force of the elastic support part when the autofocus movable part has moved.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: September 3, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Tomoyuki Murakami
  • Publication number: 20190267882
    Abstract: A vibration actuator has a movable body including a magnet, a fixing body including a coil, and an elastic support portion. The movable body vibrates in a magnetization direction of the magnet in cooperation with the coil to which power is supplied and the magnet. The fixing body has a peripheral wall portion that is disposed to surround the movable body in a direction intersecting the magnetization direction. The elastic support portion is a plate spring which has one end portion fixed to an outer periphery of the movable body opposing an inner surface of the peripheral wall portion and the other end portion fixed to the peripheral wall portion and is disposed in a radial direction from the outer periphery of the movable body. The one end portion of the elastic support portion is bonded by a fixing portion provided in the movable body.
    Type: Application
    Filed: February 28, 2019
    Publication date: August 29, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takanori MATSUYAMA, Shinya TASHIMA, Koichi AZUMAI, Katsuhiro HASHIMOTO
  • Publication number: 20190265462
    Abstract: An actuator includes: a first drive beam provided to swing and drive a target object around a first axis and having a first drive source on a front surface; a second drive beam that has a zigzag shape, in which a plurality of beams extending in a direction vertical to a second axis orthogonal to the first axis are included and in which end portions of the beams adjacent with each other are connected at turn portions, and that is provided to swing and drive the object around the second axis, and having a second drive source on a front surface; a fixed frame connected to and support the second drive beam; and a rib formed on a back surface of the second drive beam and at a position away from a connection position of the beams with the turn portions toward the second axis.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 29, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Tsukasa YAMADA
  • Publication number: 20190267881
    Abstract: A vibration actuator, includes: a movable body including a magnet; a fixing body including a coil; and an elastic support portion supporting the movable body, in which: the fixing body includes: a first fixing body disposed on one side of a vibration direction so as to cover the movable body, and a second fixing body that is bonded to the first fixing body and being configured to accommodate the movable body in such a way that the movable body is capable of vibrating, in which: the elastic support portion is a plate-shaped elastic body that includes one end portion fixed to the movable body and is provided to protrude from an outer periphery of the movable body in a radial direction, and another end portion of the elastic support portion is fixed while being sandwiched between the first fixing body and the second fixing body.
    Type: Application
    Filed: February 28, 2019
    Publication date: August 29, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takanori MATSUYAMA, Shinya TASHIMA, Koichi AZUMAI, Katsuhiro HASHIMOTO
  • Patent number: 10396526
    Abstract: A display apparatus is provided. The display apparatus is a retinal scanning type display apparatus, and includes a low output laser whose operational current is less than that of a standard output laser; a shunting element that is connected in parallel with the low output laser; and a drive circuit that supplies a current to the low output laser and the shunting element. The drive circuit is a drive circuit for the standard output laser capable of adjusting a current value on a discrete basis in a range of an operational current that is higher than the operational current of the low output laser.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: August 27, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Misato Abe
  • Patent number: 10394018
    Abstract: An optical scanning device according to an embodiment of the present invention includes a mirror that has an optical reflection surface; a movable frame that supports the mirror; a pair of drive beams that support the movable frame from both sides; drive sources that are disposed on the drive beams and cause the movable frame to be swung around a predetermined axis that passes through the center of the optical reflection surface; and a fixed frame that supports the drive beams. A movable frame connection part, via which the movable frame and one of the drive beams are connected, is substantially arranged on a side opposite to a side on which a fixed frame connection part, via which the fixed frame and the one of the drive beams are connected, is arranged, with respect to the predetermined axis.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: August 27, 2019
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventor: Tsukasa Yamada
  • Publication number: 20190257779
    Abstract: A humidity sensor includes a lower electrode formed on a substrate, a first moisture sensitive layer covering the lower electrode, an upper electrode formed on the first moisture sensitive layer, and having a predetermined opening pattern including a plurality of openings, and a second moisture sensitive layer covering the upper electrode, and the second moisture sensitive layer contacts the first moisture sensitive layer at the openings of the upper electrode.
    Type: Application
    Filed: September 28, 2017
    Publication date: August 22, 2019
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventor: Taketomo NAKANE