Tdk Corporation

Beijing Xiaomi Mobile Software Co., Ltd.

Masaru Uno

Kazutomo Imi

Akira Suzuki

Kazuhiko Inoue

Masashi Gotoh

Noriyuki Kawano

Yasuhide Yamashita

Yoshiaki Haga

Osamu Ohhata

Shintarou Koike

An aperture device for setting an amount of light incident on a lens of a camera module is provided. The aperture device includes: a diaphragm plate exhibiting a plate shape and formed with an aperture opening penetrating the diaphragm plate in a plate surface direction; and a configuration-changing mechanism for changing a configuration of the diaphragm plate to an aperture position or a retracted position, where the aperture position is a position where the diaphragm plate is on the lens and a center of the aperture opening is configured in a position corresponding to an optical axis of the lens, and the retracted position is a position where the diaphragm plate is retracted from the lens.

Aperture device, camera module with aperture device, and electronic apparatus

Provided is a camera actuator including a fixing frame, a first moving frame movable in a first direction, a second moving frame movable in a second direction orthogonal to the first direction, a lens unit movable in a third direction orthogonal to the first direction and the second direction, a first driver moving the first moving frame in the first direction, a second driver moving the second moving frame in the second direction, and a third driver moving the lens unit in a third direction. Further, the third driver includes a driving source portion formed by a first piezoelectric element and a second piezoelectric element lengthened and shortened by energization and attached to each other in a direction orthogonal to a lengthening-and-shortening direction, and an abutting portion abutting against the lens unit and moving in an elliptical trajectory according to deformation of the driving source portion.

Camera actuator

The present invention provides a driving apparatus capable of suppressing the operation noise. A driving apparatus comprises a piezoelectric element expanding and contracting in accordance with a driving signal; a supporting shaft connected to said piezoelectric element; a movable body frictionally engaged with said supporting shaft and capable of moving along said supporting shaft; and a driving portion applying said driving signal including a first driving signal which moves said movable body towards a first direction to said piezoelectric element, wherein said driving portion can repeatedly apply said first driving signal against said piezoelectric element by taking a first time in between, and said first driving signal comprises a main driving waveform group which moves said movable body to said first direction, and a sub driving waveform group which is placed after said main driving waveform group by having a second rest time shorter than said first time in between.

Method of driving a driving apparatus

A lens holding unit is held so that it can relatively move with respect to a base part to a direction vertical to an optical axis direction. The lens holding unit has a lens holder, a magnet part, and a spring. The lens holder has a first coil. The magnet part has a first magnet part which includes a first face facing to the first coil and a second magnet part which includes a second face vertical to the first face and constitutes a magnetic domain different from that of the first magnet part. These first magnet part and second magnet part are integrated.

Lens holding device

A lens holding device includes a movable part having a coil attached to a lens holder holding a lens and includes a magnet part arranged around an outer peripheral side of the movable part so as to face the coil. The lens holding device includes a support part which supports the movable part so as to move relatively and a spring which connects the movable part and the support part resiliently. The magnet part includes a resin and has an alignment part which positions the spring.

Lens holding device for camera module

A lens drive device comprises a base, a lens holder, a piezoelectric actuator having a pair of frictional parts, and a pressing piece. The lens holder has a barrel, a projection projecting from the barrel, a support separated from the barrel, and a joint joining the projection and the support to each other. The pressing piece presses the piezoelectric actuator against the barrel so as to keep such a state that at least one of the pair of frictional parts is in contact with the barrel.

Lens drive device

A driving apparatus comprises a piezoelectric element () expanding and contracting in accordance with a driving pulse signal (), a supporting shaft () connected to said piezoelectric element, a movable body () frictionally engaged with said supporting shaft and capable of moving along said supporting shaft, and a driving portion () applying said driving pulse signal having a voltage value that corresponds to a driving voltage value (VD) to said piezoelectric element in order to cause relative movement of said movable body to said supporting shaft, wherein a driving voltage waveform () showing a time-varying of said driving voltage value has a first dropping portion () where said driving voltage value sharply drops from a first value (V) to a second value (V), a second dropping portion () where said driving voltage value slowly drops from said second value (V) to a third value (V) compared with said first dropping portion, and a third dropping portion () where said driving voltage value sharply drops from said third value (V) to a standard value (V) compared with said second dropping portion.

Driving apparatus

A lens drive device comprises a lens holder, a piezoelectric actuator, a ball member held rotatably, and an biasing member configured to apply an biasing force to the lens holder toward the piezoelectric actuator through the ball member. The lens holder has a projection projecting outward from an outer peripheral surface and extending in a direction intersecting the projecting direction and optical axis. A side wall face of the projection is formed with a groove extending along the optical axis and engaging the ball member. A position receiving the biasing force from the biasing member and a position receiving the drive force from the actuator in the lens holder oppose each other through the projection interposed therebetween.

A lens driving device comprises a lens holder for holding a lens, a shaft for supporting the lens holder so as to make the lens holder movable in an optical axis direction of the lens and swingable about an axis of the shaft, an actuator for applying a driving force to the lens holder so as to move the lens holder in the optical axis direction; and an urging member for applying an urging force to the lens holder so as to rotate the lens holder toward the actuator. In the lens holder, a position where the urging force is applied by the urging member and a position where the driving force is applied by the actuator oppose each other, so that the urging force from the urging member is directed to the actuator.

Growing community of inventors

Tokyo, Japan

Masaru Uno