公开(公告)号：US20240288685A1

公开(公告)日：2024-08-29

申请号：US18655584

申请日：2024-05-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuuki ISHII ,  Yuka TANAKA ,  Katsuhiro TABUCHI ,  Takahide NAKADOI ,  Noritaka KISHI ,  Hitoshi SAKAGUCHI

IPC: G02B27/00 ,  B06B1/06 ,  G02B7/02

CPC classification number: G02B27/0006 ,  B06B1/0651 ,  G02B7/02

Abstract: An optical module includes a translucent body, a vibrator that is tubular and supports the translucent body, a piezoelectric element located at the vibrator to vibrate the vibrator, and an inner-layer optical component at an inner side portion of the vibrator. The inner-layer optical component includes an inner-layer lens that faces the translucent body, a recess that is recessed in a thickness direction of the inner-layer lens and includes a curvature on a surface of the inner-layer lens facing the translucent body, and a gap is located between the translucent body and the recess of the inner-layer lens.

公开(公告)号：US20240269707A1

公开(公告)日：2024-08-15

申请号：US18637600

申请日：2024-04-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Noritaka KISHI ,  Takahide NAKADOI

IPC: B06B1/02 ,  B06B1/06

CPC classification number: B06B1/0284 ,  B06B1/0644 ,  B06B2201/70

Abstract: An excitation device includes an output circuit to output a drive signal having a frequency component to drive a piezoelectric element to vibrate an object using a vibrating body, and a control circuit including vibration modes to control the output circuit to apply to the piezoelectric element a drive signal having a frequency based on a resonant frequency of a vibrator including the object, the vibrating body, and the piezoelectric element, the modes including a predetermined vibration mode in which the frequency of the drive signal is about 1/(2n+1) times or about (2n+1) times the resonant frequency of the vibrator, and n is a positive integer.

公开(公告)号：US20230004072A1

公开(公告)日：2023-01-05

申请号：US17574609

申请日：2022-01-13

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuuki ISHII ,  Kenji NISHIYAMA ,  Noritaka KISHI ,  Takaaki MORI ,  Masaaki TAKATA ,  Takahide NAKADOI ,  Nobumasa KITAMORI

IPC: G03B17/56 ,  B06B1/06 ,  B06B1/02 ,  G02B27/00

Abstract: A vibration device includes a light-transmissive body, and a vibrator to vibrate the light-transmissive body at a vibration acceleration of equal to or more than about 1.5×105 m/s2 and equal to or less than about 8.0×105 m/s2.

公开(公告)号：US20240418985A1

公开(公告)日：2024-12-19

申请号：US18817619

申请日：2024-08-28

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuuki ISHII ,  Noritaka KISHI ,  Hitoshi SAKAGUCHI

IPC: G02B27/00 ,  G02B7/02 ,  G02B13/00 ,  H04N23/55

Abstract: The present disclosure provides an optical device that reduces stress concentration on a vibrator while removing foreign matter adhering to a light-transparent body covering the exterior of the optical device with vibrations, and to provide an image pickup unit including the optical device. An optical device includes an outermost-layer lens, a housing, a vibrator, and a piezoelectric device. The outermost-layer lens is transparent to light of a predetermined wavelength. The housing holds the outermost-layer lens. The vibrator is in contact with the outermost-layer lens held by the housing. The piezoelectric device is disposed on the vibrator to vibrate the vibrator. The vibrator is a tubular body, and includes a connector that is in contact with the outermost-layer lens, a vibrating portion on which a piezoelectric device is disposed, and a supporter that connects the connector and the vibrating portion to each other and that has a curved cross-sectional shape.

公开(公告)号：US20240280804A1

公开(公告)日：2024-08-22

申请号：US18652021

申请日：2024-05-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuuki ISHII ,  Yuka TANAKA ,  Katsuhiro TABUCHI ,  Noritaka KISHI ,  Hitoshi SAKAGUCHI ,  Takahide NAKADOI ,  Nobumasa KITAMORI

IPC: G02B27/00 ,  H10N30/20

CPC classification number: G02B27/0006 ,  H10N30/2047

Abstract: An optical module includes a translucent body, a tubular vibrator supporting the translucent body, a piezoelectric element located at the vibrator to vibrate the vibrator, and an inner-layer optical component at an inner side portion of the vibrator, in which a first gap is located between the translucent body and the inner-layer optical component, a second gap is located between the piezoelectric element and the inner-layer optical component, at least one of a first dimension of the first gap in a vibration direction of the translucent body and a second dimension of the second gap in the vibration direction of the vibrator is in a range of about [(n×λ/2)+0.1 mm] or more and about [{(n+1)×λ/2}−0.1 mm] or less, and n indicates an integer of 0 or more, and λ indicates a wavelength of an acoustic wave generated by vibration.

公开(公告)号：US20240280803A1

公开(公告)日：2024-08-22

申请号：US18652018

申请日：2024-05-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuuki ISHII ,  Yuka TANAKA ,  Katsuhiro TABUCHI ,  Takahide NAKADOI ,  Noritaka KISHI ,  Hitoshi SAKAGUCHI

IPC: G02B27/00 ,  B06B1/06 ,  B08B7/02

CPC classification number: G02B27/0006 ,  B06B1/06 ,  B08B7/026

Abstract: An optical module includes a translucent portion, a tubular vibrator supporting the translucent portion, a piezoelectric element at the vibrator to vibrate the vibrator, and an inner-layer optical component at an inner side portion of the vibrator. A recess recessed in a thickness direction of the translucent portion and includes a curvature at a surface of the translucent portion facing the inner-layer optical component, the inner-layer optical component includes an inner-layer lens that faces the translucent portion and includes a first portion that protrudes toward the translucent portion and includes a curvature and a second portion at an outer periphery of the first portion, a first gap is located between the first portion and the translucent portion in the outer periphery of the first portion, a second gap is located between the second portion and the translucent portion, and the second gap is larger than the first gap.

公开(公告)号：US20210359193A1

公开(公告)日：2021-11-18

申请号：US17376207

申请日：2021-07-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Noritaka KISHI ,  Takahide NAKADOI

IPC: H01L41/09 ,  G02B27/00 ,  G03B17/08 ,  H01L41/08 ,  H01L41/047

Abstract: A vibration device includes a tubular body with a cavity, a first opening end surface, and a second opening end surface, a piezoelectric device joined to the first opening end surface, and a translucent cover joined to the second opening end surface. The tubular body and the piezoelectric device are joined to each other with a first adhesive layer, and the tubular body and the translucent cover are joined to each other with a second adhesive layer.

公开(公告)号：US20240351077A1

公开(公告)日：2024-10-24

申请号：US18762163

申请日：2024-07-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuka TANAKA ,  Noritaka KISHI ,  Takahide NAKADOI ,  Katsuhiro TABUCHI

IPC: B08B7/02 ,  B60S1/56 ,  G02B27/00 ,  H04N23/81

CPC classification number: B08B7/02 ,  H04N23/811 ,  B60S1/56 ,  G02B27/0006

Abstract: A vibration device includes a light transmitter, a vibrator to vibrate the light transmitter, a driver to drive the vibrator, and a controller configured or programmed to control the driver and determine a high-frequency-band resonant frequency of the vibrator according to a state of the driver obtained by changing a drive frequency of the driver within a high frequency band higher than or equal to about 100 kHz, and estimate a temperature of the light transmitter from the determined high-frequency-band resonant frequency.

公开(公告)号：US20240284059A1

公开(公告)日：2024-08-22

申请号：US18652016

申请日：2024-05-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Nobumasa KITAMORI ,  Takahide NAKADOI ,  Yuuki ISHII ,  Noritaka KISHI ,  Hitoshi SAKAGUCHI

IPC: H04N23/81 ,  H04N23/51

CPC classification number: H04N23/81 ,  H04N23/51

Abstract: A vibrating device includes a light transmitting body, a vibrating body with a tubular structure including a first end portion, a second end portion, and a side wall joining the first and second end portions, and connected to the light transmitting body at the first end portion to vibrate the light transmitting body, an extending portion extending outward from the side wall of the vibrating body, and a piezoelectric element at the second end portion of the vibrating body.

公开(公告)号：US20200033384A1

公开(公告)日：2020-01-30

申请号：US16590447

申请日：2019-10-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Noritaka KISHI ,  Yasuhiro SHIMIZU

IPC: G01R19/00 ,  G01R15/20

Abstract: A current sensor that outputs an output signal according to a signal magnetic field that is generated by a current to be measured is provided. The current sensor includes at least one magnetic sensor, a temperature sensor, an amplifier, and an offset adjusting circuit. The magnetic sensor generates a sensor signal commensurate with the signal magnetic field. The temperature sensor detects an ambient temperature. The amplifier amplifies the sensor signal at an amplification rate commensurate with the detected temperature and generates the output signal. The offset adjusting circuit adjusts an offset of the output signal. The offset adjusting circuit adjusts an offset in accordance with a relationship (mathematical expression) that holds between an output signal under no signal magnetic field and an amplification rate corresponding to the temperature.