Patent ID: 11953701
Assignee: CAMBRIDGE MECHATRONICS LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  F  H | IPC F  G  H

Claim 20:
21. A camera assembly comprising:
a shape memory alloy (SMA) actuator assembly to tilt a movable object comprising a mirror or prism relative to a static part, the actuator assembly comprising a plurality of SMA wires, wherein:
the actuator assembly is arranged to tilt the movable object about an axis;
at least one SMA wire is hooked to a feature of one of the movable object and the static part at a location between the ends of the SMA wire;
the feature extends in a direction orthogonal to the axis, forming two sections of the at least one SMA wire on opposing sides of the feature; and
the two sections of the at least one SMA wire are angled relative to each other when viewed in a direction orthogonal to the axis and orthogonal to the direction the feature extends;

a control circuit configured to drive the actuator assembly to effect optical image stabilisation; and
a vibration sensor arranged to generate output signals representative of vibration of the camera assembly, the control circuit being arranged to drive the actuator assembly in response to output signals of the vibration sensor for driving movement of the movable object to stabilise an image captured thereby.