Camera lens actuation apparatus
    2.
    发明公开
    Camera lens actuation apparatus 有权
    Kameralinsenbetätigungsvorrichtung

    公开(公告)号:EP2372428A1

    公开(公告)日:2011-10-05

    申请号:EP11171391.3

    申请日:2007-03-23

    摘要: A camera lens actuation apparatus for driving motion of a camera lens supported on a support structure by a suspension system. The apparatus incorporates a subassembly comprising SMA wire connected to at least one mounting member which is mounted to the support structure. At least one pair of lengths of SMA wire are held in tension between the camera lens element and the support structure at respective acute angles to the optical axis applying a tensional force having a component along the optical axis. The lengths of SMA wire in the pair are held at angle as viewed along the optical axis. There may be plural pairs with a balanced arrangement in which the forces generated have no net component perpendicular to the optical axis and generate no net torque around any axis perpendicular to the optical axis. A control circuit controls heating of the SMA wire in response to a measure of its resistance.

    摘要翻译: 一种用于通过悬挂系统驱动支撑在支撑结构上的相机镜头的运动的相机镜头致动装置。 该装置包括一个子组件,该子组件包括连接到至少一个安装到支撑结构上的安装构件的SMA线。 SMA线的至少一对长度以相对于光轴的锐角保持在相机透镜元件和支撑结构之间的张力中,该光轴施加沿着光轴具有分量的张力。 这对中的SMA线的长度沿光轴方向保持一定角度。 可以存在具有平衡布置的多对,其中产生的力没有垂直于光轴的网分量,并且不围绕垂直于光轴的任何轴线产生净转矩。 控制电路响应于其电阻的测量来控制SMA线的加热。