Lens driving device and camera module comprising same

Patent metadata

Field	Value
Publication number	US-2025172821-A1
Application number	US-202519039523-A
Country	US
Kind code	A1
Filing date	Jan 28, 2025
Priority date	Jan 2, 2014
Publication date	May 29, 2025
Grant date	—

Abstract

A lens driving device according to an embodiment comprises: a bobbin wherein at least one lens is installed inside thereof and a first coil is installed on the outer circumferential surface thereof; a first magnet arranged around the bobbin so as to be opposite to the first coil; a housing for supporting the first magnet; upper and lower elastic members coupled with the bobbin and the housing; a first sensor for sensing displacement of the bobbin in the first direction; a second magnet arranged so as to be opposite to the first sensor; a base arranged to be spaced apart from the housing by a certain distance; a second coil arranged so as to be opposite to the first magnet; a circuit board whereon the second coil is installed; a plurality of support members for supporting the housing so as to be movable in the second and third directions which are orthogonal to the first direction with respect to the base and for connecting at least one of the upper and lower elastic members to the circuit board; and a second sensor for sensing displacement of the housing in the second or third direction with respect to the base.

First claim

1 . An apparatus for autofocusing and handshake correction, comprising:
a base; a bobbin disposed on the base and being movable in a first direction parallel to an optical axis with respect to the base; a coil disposed on an outer circumferential surface of the bobbin; a first magnet facing the coil; a plurality of upper elastic members disposed on the bobbin and separated from each other; and a substrate disposed on the bobbin and comprising a plurality of elastic member contacts conductively connected to the plurality of upper elastic members, respectively.

2 . The apparatus according to claim 1 , wherein the plurality of elastic member contacts are disposed to face each other, with respect to a center of the optical axis.

3 . The apparatus according to claim 1 , wherein each of the plurality of upper elastic members comprises:
an outer frame; an inner frame disposed inside the outer frame; and a frame connector connecting the outer frame and the inner frame,
wherein the plurality of elastic member contacts are contacted to inner frames of the plurality of upper elastic members, respectively.

4 . The apparatus according to claim 3 , wherein the frame connector is bent many times to define a predetermined pattern.

5 . The apparatus according to claim 1 , wherein the plurality of upper elastic members comprises first to fourth upper elastic members separated from each other,
wherein the plurality of elastic member contacts comprises first to fourth elastic member contacts, and wherein the first to fourth elastic member contacts are conductively connected to inner frames of the first to fourth upper elastic members, respectively.

6 . The apparatus according to claim 5 , wherein the substrate comprises:
a body having a ring shape when viewed from the top, and a plurality of circuit patterns disposed on the body and connected to the first to fourth elastic member contacts.

7 . The apparatus according to claim 6 , wherein the body is disposed higher than the coil in the first direction.

8 . The apparatus according to claim 6 , wherein the plurality of circuit patterns comprises:
a first circuit pattern connected to voltage; and a second circuit pattern connected to ground.

9 . The apparatus according to claim 8 , further comprising a sensor disposed on the substrate and detecting displacement of the bobbin in the first direction, and
wherein the plurality of circuit patterns further comprises a third circuit pattern connected to result of the detection of the sensor.

10 . The apparatus according to claim 9 , wherein the sensor comprises a plurality of pins connected to the plurality of circuit patterns, respectively.

11 . The apparatus according to claim 1 , further comprising a plurality of lower elastic members disposed on the bobbin and conductively isolated from each other,
wherein one of the plurality of lower elastic members is connected to one of both ends of the coil, and wherein another of the plurality of lower elastic members is connected to the other of both ends of the coil.

12 . The apparatus according to claim 1 , further comprising a housing disposed on the base and being movable in a second direction perpendicular to the first direction with respect to the base.

13 . An apparatus for autofocusing and handshake correction, comprising:
a base; a housing disposed on the base, the housing being movable in a first direction perpendicular to an optical axis with respect to the base; a bobbin disposed on the base, the bobbin being movable in the first direction with the base and being movable in a second direction parallel to the optical axis with respect to the housing; a coil disposed on the bobbin; a magnet facing the coil; a substrate disposed on the bobbin, the substrate being movable in the first direction with the bobbin; and an upper elastic member connecting the housing and the bobbin, wherein the upper elastic member comprises first to fourth upper elastic members separated from each other, wherein each of the first to fourth upper elastic members comprises:
an inner frame coupled to the bobbin;
an outer frame coupled to the housing; and
a frame connector connecting the inner frame and the outer frame,
wherein the substrate comprises first to fourth elastic member contacts, and wherein the first to fourth elastic member contacts are conductively connected to inner frames of the first to fourth upper elastic members, respectively.

14 . The apparatus according to claim 13 , further comprising a plurality of wires being deformed elastically when the bobbin moves in the second direction.

15 . The apparatus according to claim 14 , wherein the plurality of wires is connected to the upper elastic member.

16 . The apparatus according to claim 14 , wherein the plurality of wires is connected to the housing.

17 . The apparatus according to claim 13 , wherein the outer frame is disposed at a corner of the housing.

18 . An apparatus for autofocusing and handshake correction, comprising:
a base; a housing; a bobbin; a coil disposed on the bobbin; a magnet facing the coil; a plurality of upper elastic members disposed between the housing and the bobbin; and a substrate disposed on the bobbin, the substrate being movable in a first direction with the bobbin, wherein the plurality of upper elastic members and the substrate are conductively connected.

19 . A camera module comprising an image sensor and the apparatus according to claim 1 .

20 . A mobile device comprising the camera module according to claim 19 .

Assignees

• Lg Innotek Co Ltd

Inventors

• Jung Tae Jin
• Min Sang Jun
• Lee Sung Guk

Classifications

• G03B2205/0069

  using electromagnetic actuators, e.g. voice coils · CPC title

• G03B3/10

  Power-operated focusing · CPC title

• G02B7/08

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

• H02K41/0356

  moving along a straight path · CPC title

• G03B5/00 Primary

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title