Lens Moving Apparatus

Patent metadata

Field	Value
Publication number	US-2016259144-A1
Application number	US-201615156946-A
Country	US
Kind code	A1
Filing date	May 17, 2016
Priority date	May 9, 2014
Publication date	Sep 8, 2016
Grant date	—

Abstract

Embodiments provide a lens moving apparatus including housing to support a driving magnet, a bobbin provided at an outer circumferential surface thereof with a coil located inside the driving magnet, the bobbin being moved in a first direction parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil, a lower elastic member to connect a lower portion of the housing and a lower portion of the bobbin to each other, both ends of the coil being electrically connected to the lower elastic member, the lower elastic member having a first terminal electrically connected to an external power source so as to supply external power to the ends of the coil, and a printed circuit board provided at one side surface of the housing, the printed circuit board having a second terminal electrically connected to the external power source.

First claim

What is claimed is:

1 . A lens moving apparatus comprising:
a housing; a base disposed below the housing; a bobbin disposed in the housing and including a recess inwardly formed from an outer circumferential surface thereof, wherein the bobbin is configured to be moved in a first direction along or parallel to an optical axis within the housing; a driving magnet disposed on the housing; a coil provided at the outer circumferential surface of the bobbin and located inside the driving magnet; an elastic member coupled to the bobbin and supporting the bobbin; and a printed circuit board provided at one side surface of the housing.

2 . The lens moving apparatus according to claim 1 , wherein the elastic member comprises a lower elastic member coupled to a lower portion of the bobbin and an upper elastic member coupled to an upper portion of the bobbin, and each of the upper elastic member and the lower elastic member comprises an inner frame coupled to the bobbin, an outer frame spaced from the inner frame, and a connector connecting the inner frame and the outer frame.

3 . The lens moving apparatus according to claim 2 , wherein the outer frame of the upper elastic member is coupled to the housing using an adhesive or via fusion and, the inner frame of the upper elastic member is coupled to the bobbin using an adhesive or via fusion.

4 . The lens moving apparatus according to claim 2 , wherein a plurality of upper frame support bosses protrude from a top of the housing, first through-holes or recesses having a shape corresponding to a shape of the upper frame support bosses are formed at the outer frame of the upper elastic member, and the upper frame support bosses are coupled with the first through-holes or the recesses.

5 . The lens moving apparatus according to claim 2 , wherein a plurality of lower frame support bosses protrude from a lower portion of the housing, insertion recesses or holes having a shape corresponding to a shape of the lower frame support bosses are formed at the outer frame of the lower elastic member, and the lower frame support bosses are coupled with the insertion recesses or the holes.

6 . The lens moving apparatus according to claim 1 , wherein the printed circuit board having an input terminal and an output terminal configured to be electrically connected to an external power source, and
wherein the elastic member is electrically connected to one terminal among the input terminal and the output terminal.

7 . The lens moving apparatus according to claim 6 ,
wherein further comprising: a sensing magnet disposed in the recess of the bobbin and coupled to the bobbin; and a position sensor disposed at a position corresponding to the sensing magnet, wherein the position sensor is configured to sense a displacement of the sensing magnet in the first direction.

8 . The lens moving apparatus according to claim 7 , wherein the position sensor is mounted on a printed circuit board, and the printed circuit board comprises a plurality of terminals configured to be electrically connected to an external power source.

9 . The lens moving apparatus according to claim 8 , wherein the printed circuit board comprises a flexible printed circuit board.

10 . The lens moving apparatus according to claim 9 , wherein the plurality of terminals of the flexible printed circuit board is disposed on the base.

11 . The lens moving apparatus according to claim 7 , wherein the position sensor is disposed inside the printed circuit board.

12 . The lens moving apparatus according to claim 7 , wherein the position sensor is a hall sensor.

13 . The lens moving apparatus according to claim 1 , further comprising a weight balance member apposite the sensing magnet.

14 . The lens moving apparatus according to claim 1 , wherein the printed circuit board is provided at one side surface of the base.

15 . The lens moving apparatus according to claim 14 , wherein the printed circuit board is provided at one side surface of the housing.

16 . The lens moving apparatus according to claim 1 , wherein the driving magnet is configured into a cuboid having a constant width and arranged along a side surface of the housing.

17 . The lens moving apparatus according to claim 16 , wherein the driving magnet is provided with plurality, the driving magnets facing each other are installed in parallel with each other and arranged to face the coil.

18 . The lens moving apparatus according to claim 16 , wherein the driving magnet is arranged to face the coil, and the driving magnet is oriented in such a way that one surface facing the coil defines an N-pole and an opposite outer surface thereof defines an S-pole or, oriented in an opposite way thereof.

19 . The lens moving apparatus according to claim 16 , wherein the driving magnet is arranged to face the coil, and the driving magnet is bisected into planes perpendicular to the first direction.

20 . The lens moving apparatus according to claim 1 , wherein the coil is wound around the outer circumferential surface of the bobbin by an even number of turns.

21 . The lens moving apparatus according to claim 1 , wherein the coil is wound around the outer circumferential surface of the bobbin in three layers or in six layers.

22 . A camera module comprising the lens moving apparatus according to claim 1 .

23 . A cellular phone comprising the camera module according to claim 22 .

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Jun Taek
• Park Sang Ok
• Son Byung Wook
• Lee Seong Min

Classifications

• G02B7/08 Primary

  adapted to co-operate with a remote control mechanism · CPC title

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/51

  Housings · CPC title