Patents Assigned to Mitsumi Electric Co., Ltd.
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Publication number: 20220221712Abstract: An optical deflection apparatus includes a first optical deflection part configured to deflect light incident on a first reflection surface, by swinging the first reflection surface about a first swing axis, and a second optical deflection part configured to deflect the light deflected by the first reflection surface, by swinging a second reflection surface about a second swing axis crossing the first swing axis. The first swing axis crosses a first incidence plane including a central axis of the light incident on the first reflection surface and a central axis of the light deflected by the first reflection surface, and the second swing axis crosses a second incidence plane including a central axis of the light incident on the second reflection surface and a central axis of the light deflected by the second reflection surface.Type: ApplicationFiled: January 4, 2022Publication date: July 14, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventor: Tsukasa YAMADA
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Patent number: 11385053Abstract: The distance measuring camera includes a first imaging system for obtaining a first image, a second imaging system for obtaining a second image and a size obtaining part 3 for measuring a distance between a plurality of feature points of a first subject in the first image to obtain a size of the first subject image and measuring a distance between a plurality of feature points of a second subject image in the second image to obtain a size of the second subject image. The size obtaining part 3 searches pixels on an epipolar line only in a search area of the second image in which a first imaging area corresponding to the first image can be overlapped with a second imaging area corresponding to the second image to detect the plurality of feature points of the second subject image.Type: GrantFiled: October 7, 2019Date of Patent: July 12, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventor: Satoru Suto
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Patent number: 11387821Abstract: A pulse signal sending circuit that outputs pulse signals from an output terminal includes: an output transistor; an inverter circuit; and a delay circuit. The output transistor includes a drain terminal connected to the output terminal. The inverter circuit is connected to a gate terminal of the output transistor and outputs a signal to be input to the gate terminal of the output transistor. The delay circuit receives a pulse signal as an input and delays rising or falling of the input pulse signal. The pulse signal delayed by the delay circuit is input to the inverter circuit.Type: GrantFiled: January 30, 2021Date of Patent: July 12, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventor: Keizo Kumagai
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Publication number: 20220214228Abstract: A temperature measurement circuit for measuring a temperature using a temperature sensitive element includes a voltage control circuit configured to apply a control voltage to the temperature sensitive element. The temperature measurement circuit includes a first switching circuit configured to switch levels of the control voltage based on a current flowing through the temperature sensitive element. The temperature measurement circuit includes a conversion circuit configured to convert the current flowing through the temperature sensitive element into a voltage level corresponding to the measured temperature, by using predetermined conversion gain. The temperature measurement circuit includes a second switching circuit configured to switch values of the conversion gain based on the voltage level.Type: ApplicationFiled: December 27, 2021Publication date: July 7, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventor: Kohei SHIBATA
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Patent number: 11381749Abstract: A camera module has: a lens holder for holding a lens unit; an image sensor holding unit that is arranged spaced apart from the lens holder in a first direction along the optical axis of the lens unit and holds an image sensor; and a drive unit that moves the image sensor holding unit with respect to the lens holder in a second direction and a third direction which are perpendicular to the optical axis and are perpendicular to each other, and that rotates the image sensor holding unit around the optical axis.Type: GrantFiled: August 22, 2019Date of Patent: July 5, 2022Assignee: Mitsumi Electric Co., Ltd.Inventor: Tomohiko Osaka
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Publication number: 20220206287Abstract: This lens driving device is configured separately from a lens unit including a liquid lens, and is provided with: a fixed part; a movable part; a support part that supports the movable part with respect to the fixed part; a driving unit that is formed from a voice coil motor comprising a coil and a magnet and that moves the movable part in an optical axis direction with respect to the fixed part; and a lens deformation unit that is connected to the movable part and that applies, in association with the movement of the movable part, a force to the liquid lens in the optical axis direction. The movable part has a plurality of movable units, and the driving unit drives the movable units independently so as to change the curvature of the liquid lens or to change the optical axis of the liquid lens.Type: ApplicationFiled: May 22, 2020Publication date: June 30, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Tomohiko OSAKA, Ichiro HAYASHI, Atsushi KIKUCHI
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Publication number: 20220206123Abstract: A light scanning device includes a light emitter configured to emit light; an optical scanner configured to cause the light to scan; a light receiver configured to receive returning light as scanning light from the optical scanner being reflected or scattered on an object; and an optical scanning controller including processing circuitry configured to control the optical scanner. The optical scanner includes a rotating polyhedron configured to include a plurality of reflective surfaces, to cause the light to scan around a first axis by reflecting the light on a reflective surface while rotating around the first axis; a supporter configured to support the rotating polyhedron; and a rotating mechanism configured to rotate the supporter around a second axis that crosses the first axis, to cause the light reflected on the reflective surface to scan around the second axis.Type: ApplicationFiled: December 16, 2021Publication date: June 30, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Kensuke YAMADA, Takahiko NISHIYAMA, Toyoki TANAKA, Yuji KIMURA
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Patent number: 11365116Abstract: The present invention is to provide an optical scanner module. An optical scanner apparatus scans laser light by oscillating a mirror with a piezoelectric element. A package that mounts the optical scanner apparatus and electrically is connected to a substrate via a connector. A package cover that is fixed to the package and seals the optical scanner apparatus so that the optical scanner apparatus is not visually recognized from an outside. The package and the package cover are bonded by a heat curing adhesive agent. A vent for releasing gas in a space where the optical scanner apparatus is sealed is formed in the package cover, and the vent is blocked by ultraviolet curing resin.Type: GrantFiled: April 15, 2020Date of Patent: June 21, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Tsukasa Yamada, Takahiro Wakasugi, Shinobu Kasahara
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Publication number: 20220182049Abstract: A semiconductor integrate circuit device includes: an output transistor connected between a voltage input terminal to which a DC voltage is input and a voltage output terminal; a control circuit that controls on/off of the output transistor; a proportional current generation circuit capable of generating a current proportionally smaller than a current flowing through the output transistor; an overcurrent detection circuit capable of detecting an overcurrent state of an output current by determining whether a current flowing through the output transistor is equal to or greater than a first predetermined current value, based on the current generated by the proportional current generation circuit; and a retry circuit that generates and outputs a signal for intermittently turning off the output transistor in response to the overcurrent detection circuit detecting the overcurrent state.Type: ApplicationFiled: December 6, 2021Publication date: June 9, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventor: Yoichi TAKANO
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Patent number: 11353902Abstract: A power control semiconductor device includes: a voltage control transistor connected between an input terminal and an output terminal; a control circuit that controls the voltage control transistor in accordance with a voltage of the output terminal; and an external terminal that controls an output voltage externally. The control circuit includes: a first divider which has resistor elements connected in series to the output terminal and which divides the output voltage of the output terminal; a first error amplifier that outputs a voltage corresponding to a potential difference between a predetermined reference voltage and a voltage divided by the first divider; and an output voltage change circuit that changes the divided voltage in accordance with a voltage input to the external terminal to change the output voltage in accordance with the voltage of the external terminal.Type: GrantFiled: April 29, 2020Date of Patent: June 7, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Shinichiro Maki, Yoichi Takano, Katsuhiro Yokoyama
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Patent number: 11353695Abstract: 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: GrantFiled: February 19, 2019Date of Patent: June 7, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventor: Tsukasa Yamada
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Patent number: 11341668Abstract: A distance measuring camera contains a first imaging system for obtaining a first image containing a first subject image, a second imaging system for obtaining a second image containing a second subject image, a size obtaining part for detecting a plurality of feature points of the first subject image in the first image and measure a distance between the feature points of the first subject image to obtain a size of the first subject image and utilizes an epipolar line to detect a plurality of feature points of the second subject image respectively corresponding to the plurality of feature points of the first subject image and measures a distance between the feature points of the second subject image to obtain a size of the second subject image and a distance calculating part for calculating a distance to the subject based an image magnification ratio between a magnification of the first subject image and a magnification of the first subject image and a magnification of the second subject image.Type: GrantFiled: July 8, 2019Date of Patent: May 24, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventor: Satoru Suto
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Patent number: 11336057Abstract: An electrical connector contains a first contact group arranged on a first contact plane, a second contact group arranged on a second contact plane and a ground plate located on a ground plane. The ground plate is located between horizontally extending portions of the contacts of the first contact group and horizontally extending portions, downwardly extending portions and terminal portions of the contacts of the second contact group in addition to between contacting portions and the horizontally extending portions of the contacts of the first contact group and contacting portions and the horizontally extending portions of the contacts of the second contact group.Type: GrantFiled: October 2, 2020Date of Patent: May 17, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Takashi Kawasaki, Hiroyuki Sadohara, Taro Mizue
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Patent number: 11327516Abstract: 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: GrantFiled: October 1, 2020Date of Patent: May 10, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Shinichiro Maki, Yoichi Takano, Katsuhiro Yokoyama
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Patent number: 11329648Abstract: A discharge control circuit includes discharge elements, logic circuits, and at least one delay circuit. Each of the logic circuits controls turning-on and turning-off the discharge elements based on a control signal inputted externally. The delay circuit delays an output signal of a first logic circuit among the logic circuits. The discharge control circuit pulls out charges from a corresponding terminal in response to turning-on of the discharge elements. A signal delayed by the delay circuit is inputted to a second logic circuit among the logic circuits so that the discharge elements are controlled in a predetermined order by one control signal.Type: GrantFiled: February 19, 2021Date of Patent: May 10, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventor: Yuichi Ueda
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Publication number: 20220140596Abstract: A secondary battery protection circuit for protecting a secondary battery, including: a low-voltage detecting circuit configured to detect a voltage across the secondary battery that is lower than a second voltage for low voltage detection, the second voltage being set to be lower than a first voltage for overdischarge detection; and a switching circuit configured to cause a gate of a charge control NMOS transistor to be fixed at a potential at a high side power supply terminal, upon detecting, by the low-voltage detecting circuit, that the voltage across the secondary battery is lower than the second voltage for low voltage detection.Type: ApplicationFiled: January 20, 2022Publication date: May 5, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventor: Takashi TAKEDA
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Patent number: 11314271Abstract: 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: GrantFiled: October 1, 2020Date of Patent: April 26, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Shinichiro Maki, Yoichi Takano, Katsuhiro Yokoyama
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Publication number: 20220120562Abstract: A distance measurement camera contains a first optical system OS1 for forming a first subject image, a second optical system OS2 for forming a second subject image, an imaging part S for imaging the first subject image and the second subject image and a distance calculating part 4 for performing calculation depending on image heights of distance measurement target points of the first subject image and the second subject image corresponding to a distance measurement target point of a subject 100 to calculate the distance to the subject 100 based on an image magnification ratio between a magnification of the first subject image and a magnification of the first subject image and a magnification of the second subject image.Type: ApplicationFiled: December 2, 2019Publication date: April 21, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventor: Fumiya NAGAI
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Publication number: 20220115972Abstract: A motor driving circuit includes a wiring pattern formed in a circuit board, which is configured such that electrical current flowing into a motor flows through the wiring pattern; and a current measurement circuit configured to measure an amount of electrical current flowing through the wiring pattern, based on an amount of voltage drop occurring in response to flowing of the electrical current. The motor driving circuit includes a drive unit configured to adjust a current measurement value measured by the current measurement circuit, based on first adjustment data that compensates for variation in resistance of the wiring pattern caused by an individual difference in the circuit board, and to drive the motor based on an adjusted current value which is the adjusted current measurement value.Type: ApplicationFiled: December 20, 2021Publication date: April 14, 2022Applicant: MITSUMI ELECTRIC CO., LTD.Inventors: Hitoshi HAGIMORI, Itsuki NAKANO
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Patent number: 11300506Abstract: A droplet sensor has an optical cover with a curved surface that forms a part of a spheroid, a light source positioned at a first focal point of an ellipse, the first focal point facing the curved surface, and a photodetector positioned at a second focal point of the ellipse. The ellipse has an eccentricity determined such that the curved surface has an effective detection area that satisfies conditions for total internal reflection at an interface with a gas and that does not satisfy the conditions for total internal reflection at an interface with a liquid.Type: GrantFiled: November 7, 2018Date of Patent: April 12, 2022Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Yuya Kawasaki, Hideo Kurosawa