An optical element driving mechanism is provided, including a fixed portion, a movable portion, a driving assembly, and a connecting assembly. The fixed portion includes a base and a case. The movable portion is movable relative to the fixed portion and is used for connecting an optical element. The driving assembly is disposed between the fixed portion and the movable portion for moving the movable portion relative to the fixed portion. The connecting assembly is disposed between the fixed portion and the movable portion.

The actuator assembly comprises a first part (102), a second part (110) and a helical bearing arrangement. The helical bearing arrangement is arranged to guide helical movement of the second part with respect to the first part around a helical axis H such that rotation of the second part around the helical axis is converted into helical movement of the second part. The first and second parts comprise respective stops (152, 162) that are arranged such that the stops are spaced from each other throughout an operating range of said helical movement of the second part relative to the first part. The stops are configured to engage if the second part is moved relative to the first part in at least one direction other than the direction of said helical movement such that the engagement of the stops restricts relative movement of the first and second parts.

A camera apparatus is described that includes a frame housing and a camera module affixed to the frame housing. The camera module may include a lens and an image sensor. The camera apparatus may include a reflective element and a motor. The reflective element may be disposed within the frame housing, the reflective element being movable relative to the lens to select a direction from which the lens collects light. The motor may be adapted to move the reflective element in response to detecting a magnetic field change generated by at least one magnet disposed within the frame housing.

A projection device includes: an illumination system providing an illumination beam; a light valve arranged on a transmission path of the illumination beam and converting the illumination beam into an image beam; a projection lens arranged on a transmission path of the image beam and projecting the image beam out of the projection device; a first actuating module connecting and moving a first element, so that the image beam shifts back and forth along at least one of the first, second, and third directions; and a second actuating module connecting and moving a second element, so that the image beam shifts back and forth along at least one of the first, second, and third directions. The first and second directions are perpendicular. The third and first directions form an angle of 45 degrees, so do the third and second directions. The first and second elements are different.

Various embodiments provide an optical image stabilization system, comprising: a sensor configured to detect a disturbance signal; a processor; an actuator; and an actuator driver. The sensor can be configured to detect a disturbance signal, wherein the disturbance signal applies a force to a moving body, and wherein the force causes the moving body to displace. The processor can be configured to determine: a target position of the moving body according to the detected disturbance signal; and a corrected driving current according to the target position. The actuator can be configured to: receive the corrected driving current receive the corrected driving current; and position the moving body in response to receiving the corrected driving current, wherein the moving body is positioned in a direction opposite to that of the displacement. The actuator driver can be configured to controllably operate the actuator according to the corrected driving current.

A cylindrical actuator sub-assembly (100, 200, 300) comprising: an element (14, 24, 34) movable along a longitudinal axis (A), at least one actuating member and a guidance mechanism suitable for guiding the element, wherein aid guidance mechanism includes a first ring-shaped lever (11, 21, 31) and a second ring-shaped lever (11′, 21′, 31′) that are parallel to each other, at least two straight axial flexures (12, 12′; 22, 22′; 32, 32′), at least two flexures (16, 16′; 27, 27′; 36, 36′) and at least two bases (13, 13′; 23, 23′; 33, 33′), a first base carrying the movable element.

A lens unit includes a guided portion that includes a first bearing portion and a second bearing portion disposed to be spaced apart from each other in a direction X and is slidably supported by a guide shaft, and a lens holding member. The lens unit includes a first tilt-preventing member having a linear expansion coefficient lower than a linear expansion coefficient of the lens holding member. The first tilt-preventing member is fixed to a region of the guided portion positioned between the first bearing portion and second bearing portion.

An optical element driving mechanism is provided. The optical element driving mechanism includes a fixed part, a movable part, a driving assembly, and a sensing assembly. The movable part moves relative to the fixed part. The driving assembly drives the movable part to move relative to the fixed part. The sensing assembly senses the movement of the movable part.

An optical element driving mechanism is provided, including a fixed portion, a movable portion, a driving assembly, and a stopping assembly. The movable portion is movably connected to the fixed portion, wherein the movable portion is used for connecting to an optical element having a main axis. The driving assembly is disposed on the fixed portion or the movable portion, and the driving assembly is used for driving the movable portion to move relative to the fixed portion. The stopping assembly is connected to the movable portion and the fixed portion.

An optical member driving mechanism is provided, including a movable portion, a fixed portion, and a driving assembly. The movable portion is connected to an optical member. The fixed portion has an accommodating space, and the optical member is received in the accommodating space. The movable portion is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move relative to the fixed portion.