Camera assembly
A camera assembly comprises a lens assembly supported on a support structure, wherein the lens assembly includes an autofocus actuator arrangement and the camera assembly includes an optical image stabilization assembly arranged to move the lens assembly in a plane perpendicular to the optical axis. A flexible printed circuit tape connected between the support structure and the lens assembly and providing an electrical connection to the auto-focus actuator arrangement is bent around a corner, thereby allowing the flexible printed circuit tape to accommodate the motion of the lens assembly perpendicular to the optical axis. A crimp plate connected to the lens assembly which crimps shape memory alloy wires has features extending out of the plane of the crimp plate for reducing flexibility. At least part of the optical image stabilization assembly overlaps the lens assembly in the direction along the optical axis, thereby reducing the height of the camera assembly.
1. A camera assembly comprising:
a support structure;
a lens assembly comprising a lens carriage, at least one lens having an optical axis and supported on the lens carriage in a manner allowing movement of the at least one lens along its optical axis and an autofocus actuator arrangement arranged to move the lens relative to the lens carriage along the optical axis, wherein the lens carriage is supported on the support structure in a manner allowing movement of the lens assembly relative to the support structure in a plane perpendicular to the optical axis;
an optical image stabilisation assembly arranged to move the lens carriage relative to the support structure in said plane perpendicular to the optical axis;
a flexible printed circuit tape that flexes predominantly in a direction perpendicular to its face, the flexible printed circuit tape being connected between the support structure and the lens assembly and providing an electrical connection to the autofocus actuator arrangement, the flexible printed circuit tape being bent around a corner extending along an axis parallel to the optical axis so that there is a part of the flexible printed circuit tape on each side of the corner, each part of the flexible printed circuit tape flexing in different directions perpendicular to the optical axis; and
a bend former connected to the flexible printed circuit tape on each side of the corner.
2. A camera assembly according to claim 1 , wherein the flexible printed circuit tape is bent around a corner of 90 degrees.
3. A camera assembly according to claim 1 , wherein the bend former is made of metal.
4. A camera assembly according to claim 1 , wherein the bend former comprises two mount portions connected to the flexible printed circuit tape at separated locations on each side of the corner and at least one bridge portion extending between the mount portions without being connected to the flexible printed circuit tape.
5. A camera assembly according to claim 4 , wherein the at least one bridge portion extends between the mount portions outside the flexible printed circuit tape.
6. A camera assembly according to claim 5 , wherein the at least one bridge portion comprises two bridge portions extending between the mount portions outside the flexible printed circuit tape on opposite sides of the flexible printed circuit tape.
7. A camera assembly according to claim 4 , wherein the bend former is formed from a sheet in which the bridge portion has been plastically deformed.
8. A camera assembly according to claim 1 , wherein the optical image stabilisation assembly comprises shape memory alloy wires.
9. A camera assembly according to claim 1 , further comprising an image sensor mounted to the support structure.
10. A camera assembly according to claim 1 , wherein the at least one lens has a diameter of 10 mm or less.