APPARATUS AND METHOD FOR CONTROLLING AUTO FOCUS OF CAMERA MODULE

    公开(公告)号:US20170264814A1

    公开(公告)日:2017-09-14

    申请号:US15455040

    申请日:2017-03-09

    Abstract: Disclosed are an apparatus and method for controlling auto focus of a camera module including a voice coil motor actuator. The present invention includes a fixed unit having a perforated hole formed therein, a magnet placed inside the fixed unit, a lens unit including at least one lens and configured to linearly move inside the perforated hole of the fixed unit, an Optical Image Stabilizer (OIS) coil placed between the fixed unit and the lens unit to correct destabilization of the lens unit, a moving coil placed on a surface of the lens unit, a fixed coil receiving from the moving coil, a variable current or a variable voltage according to a distance moved by the moving coil, an image signal processing unit processing an image signal sensed by the sensing unit, and a controller configured to provide a signal comprising first frequency signal and second frequency signal to the moving coil, wherein the fixed coil receiving the variable current or the variable voltage through the second frequency signal, calculate a focus position value based on the received variable current or the variable voltage according to a distance moved by the moving coil from the fixed coil and the image signal processed by the image signal processing unit, and control the lens unit to move by applying first frequency signal to the moving coil according to the calculated focus position value, wherein the controller is further configured to receive the second frequency signal only during a specific time slot in order for the second frequency signal to not include noise due to OIS signal and apply the OIS signal to the OIS coil during the rest of a time slot of the second frequency signal.

    CAMERA MODULE AND METHOD FOR AUTO FOCUSING THEREOF
    17.
    发明申请
    CAMERA MODULE AND METHOD FOR AUTO FOCUSING THEREOF 有权
    相机模块及其自动聚焦方法

    公开(公告)号:US20150207983A1

    公开(公告)日:2015-07-23

    申请号:US14601850

    申请日:2015-01-21

    Abstract: A camera module including a fixing unit including a hole formed therein a moving unit including at least one lens, and configured to linearly move in the hole of the fixing unit; and a driving unit configured to drive the moving unit. Further, the driving unit includes a corresponding magnet arranged in the inner surface of the hole of the fixing unit; a moving coil surrounding the outer surface of the moving unit; and a fixed coil arranged in the fixing unit and configured to receive from the moving coil a current or voltage variable based on a distance with the moving coil.

    Abstract translation: 一种相机模块,包括固定单元,该固定单元包括形成在其中的孔,所述移动单元包括至少一个透镜,并且构造成在所述定影单元的孔中线性移动; 以及构造成驱动移动单元的驱动单元。 此外,驱动单元包括布置在定影单元的孔的内表面中的相应磁体; 围绕所述移动单元的外表面的移动线圈; 以及设置在所述固定单元中并且被配置为基于与所述运动线圈的距离从所述运动线圈接收电流或电压变量的固定线圈。

    CAMERA MODULE AND METHOD FOR AUTO FOCUS THEREOF

    公开(公告)号:US20190146179A1

    公开(公告)日:2019-05-16

    申请号:US16300038

    申请日:2016-06-30

    Abstract: The present invention relates to an apparatus and a method for controlling auto focus of a camera module including a voice coil motor actuator. The camera module includes a sensing unit configured to sense a movement of the lens unit and a controller configured to control the movement of the lens unit based on a sensing signal sensed by the sensing unit. If an initial operation command is received, the controller moves the lens unit to an end point of a maximum movement range. If the lens unit is positioned at the end point of the maximum movement range, the controller compares the sensing signal sensed by the sensing unit with a predetermined reference signal to calculate a compensation value for an error. If a focus operation command is received, the controller can move the lens unit to a focus position based on the calculated compensation value and compensate for the focus position of the lens unit.

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