Shape memory alloy actuator

A shape memory alloy (SMA) actuator for a camera assembly, comprising:

• a support structure having an electronic component, the electronic component extends along a plane orthogonal to a primary axis;
• a moveable part moveable relative to the support structure;
• a length of SMA wire connected between the moveable part and the support structure, wherein the length of SMA wire is configured to, on contraction, drive movement of the moveable part;
• a first electrical path and a second electrical path defined between, and/or including, the length of SMA wire and respective electrical terminals;
• and
• wherein the first and second electrical paths of the length of SMA wire are configured to, at least in part, extend adjacently to and in parallel with each other around at least two sides of the electronic component when viewed along the primary axis, and enabling a majority of electrical current in the respective paths to flow in opposite directions, so as to reduce or minimise combined magnetic flux from the first and second electrical paths into the electronic component.

A shape memory alloy (SMA) actuator for a camera assembly, comprising:

• a support structure supporting an electronic component, wherein the electronic component is susceptible to interference caused by magnetic flux;
• a moveable part moveable relative to the support structure;
• plural lengths of SMA wire connected between the moveable part and the support structure, wherein the plural lengths of SMA wire are configured to, on contraction, drive movement of the moveable part;
• respective electrical paths defined between, and/or including, each of the plural SMA components and respective electrical terminals;
• and
• wherein the electrical paths of the plural lengths of SMA wire are configured to, at least in part, extend adjacently to and in parallel with each other, and enabling electrical current in the electrical paths to flow in opposite directions, so as to reduce or minimise combined magnetic flux from the electrical paths into the electronic component.