公开(公告)号：US20190146179A1

公开(公告)日：2019-05-16

申请号：US16300038

申请日：2016-06-30

Applicant: LG ELECTRONICS INC.

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

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

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.

公开(公告)号：US20190068852A1

公开(公告)日：2019-02-28

申请号：US16168042

申请日：2018-10-23

Applicant: LG ELECTRONICS INC.

Inventor： Hyungjoo KANG ,  Sungdu KWON ,  Salkmann JI ,  Samnyol HONG

IPC: H04N5/225 ,  G02B7/08 ,  G01D5/20 ,  G02B13/00 ,  G02B27/64

CPC classification number: H04N5/2254 ,  G01D5/2046 ,  G02B7/08 ,  G02B13/004 ,  G02B27/646 ,  H04N5/2252 ,  H04N5/2257

Abstract: A displacement sensor includes a first frame; a second frame; a first coil including a first voltage formed at the first frame applied to the first coil; a second coil formed at the first frame including a current of a second voltage flowing in the second coil corresponding to a voltage of the first frame if the first voltage is applied to the first coil; a conductor coupled to the second frame; and a detector for calculating a relative position between the first frame and the second frame by monitoring the second voltage. Further, a size of the second voltage is reduced if the second coil is moved closer to the conductor.

公开(公告)号：US20170299408A1

公开(公告)日：2017-10-19

申请号：US15442389

申请日：2017-02-24

Applicant: LG ELECTRONICS INC.

Inventor： Hyungjoo KANG ,  Sungdu KWON ,  Salkmann JI ,  Samnyol HONG

IPC: G01D5/22 ,  H04N5/225 ,  G02B7/09 ,  H02J50/10 ,  H02J50/90

CPC classification number: H04N5/2254 ,  G01D5/2046 ,  G02B7/08 ,  G02B13/004 ,  G02B27/646 ,  H04N5/2252 ,  H04N5/2257

Abstract: A displacement sensor comprises a first frame; a second frame; a first coil wherein a first voltage formed at the first frame is applied; a second coil formed at the first frame, wherein a current of a second voltage flows if the first voltage is applied to the first coil; a conductor coupled to the second frame; and a detector for calculating a relative position between the first frame and the second frame by monitoring the second voltage. Since two coils are embodied in one frame, the number of process times can be reduced and space utility can be enhanced.