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    CAMERA MODULE AND METHOD FOR AUTO FOCUS THEREOF
    1.
    发明申请
    CAMERA MODULE AND METHOD FOR AUTO FOCUS THEREOF 审中-公开

    公开(公告)号：US20190146179A1

    公开(公告)日：2019-05-16

    申请号：US16300038

    申请日：2016-06-30

    申请人： LG ELECTRONICS INC.

    发明人： Youngman KWON ,  Hyungjoo KANG ,  Sungdu KWON ,  Jayong LEE ,  Haejin PARK ,  Samnyol HONG

    IPC分类号： G02B7/09 ,  G03B13/36 ,  H02P7/025 ,  H02K11/225 ,  H02K41/035 ,  G01D5/20

    摘要： 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.

    APPARATUS AND METHOD FOR CONTROLLING AUTO FOCUS OF CAMERA MODULE
    2.
    发明申请
    APPARATUS AND METHOD FOR CONTROLLING AUTO FOCUS OF CAMERA MODULE 有权

    公开(公告)号：US20170264814A1

    公开(公告)日：2017-09-14

    申请号：US15455040

    申请日：2017-03-09

    申请人： LG ELECTRONICS INC.

    发明人： Haejin PARK ,  Sungdu KWON ,  Youngman KWON ,  Jayong LEE ,  Taegil CHO ,  Salkmann JI ,  Samnyol HONG

    IPC分类号： H04N5/232 ,  G02B7/09 ,  G02B27/64 ,  G02B7/36

    CPC分类号： H04N5/23212 ,  G02B7/08 ,  G02B7/09 ,  G02B7/28 ,  G02B7/36 ,  G02B7/365 ,  G02B27/646 ,  G05D3/14 ,  H02P7/025 ,  H02P29/64 ,  H02P2203/00 ,  H04N5/06 ,  H04N5/23248 ,  H04N5/23254

    摘要： 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.