Lens driving device and camera module

Patent metadata

Field	Value
Publication number	US-2020033551-A1
Application number	US-201816498358-A
Country	US
Kind code	A1
Filing date	Mar 12, 2018
Priority date	Mar 30, 2017
Publication date	Jan 30, 2020
Grant date	—

Abstract

The present embodiment relates to a lens driving device comprising: a housing; a bobbin disposed in the housing; a magnet and a dummy member, arranged at the housing; a first coil disposed on the bobbin; and a substrate comprising a second coil facing the magnet, wherein the housing comprises a first and a second side part facing each other and a third and a fourth side part facing each other, the magnet comprises a first magnet unit disposed at the first side part, a second magnet unit disposed at the third side part, and a third magnet unit disposed at the fourth side part, and the dummy member is disposed at the second side part.

First claim

1 - 10 . (canceled)

11 . A lens driving device comprising:
a housing; a bobbin disposed in the housing; a magnet disposed on the housing; a first coil disposed on the bobbin; and a substrate comprising a second coil facing the magnet, wherein the housing comprises a first and a second side part facing each other, and a third and a fourth side part facing each other, wherein the magnet comprises a first magnet unit disposed on the first side part, a second magnet unit disposed on the third side part, and a third magnet unit disposed on the fourth side part, wherein the first coil comprises a first coil unit facing the second magnet unit, and a second coil unit facing the third magnet unit, and wherein the first coil is not disposed between the bobbin and the first magnet unit.

12 . A lens driving device comprising:
a housing; a bobbin disposed in the housing; a magnet and a dummy member, disposed on the housing; a first coil disposed on the bobbin; and a substrate comprising a second coil facing the magnet, wherein the housing comprises a first and a second side part facing each other, and a third and a fourth side part facing each other, wherein the magnet comprises a first magnet unit disposed on the first side part, a second magnet unit disposed on the third side part, and a third magnet unit disposed on the fourth side part, and wherein the dummy member is disposed on the second side part.

13 . A lens driving device comprising:
a housing; a bobbin disposed in the housing; a magnet disposed on the housing; a first coil disposed on the bobbin; and a substrate comprising a second coil facing the magnet, wherein the housing comprises a first and a second side part facing each other, and a third and a fourth side part facing each other, wherein the magnet comprises a first magnet unit disposed on the first side part, a second magnet unit disposed on the third side part, and a third magnet unit disposed on the fourth side part, and wherein the first magnet unit is a 2-pole magnet, and the second magnet unit and the third magnet unit are 4-pole magnets.

14 . The lens driving device according to claim 12 , wherein the first coil comprises a first coil unit facing the second magnet unit, and a second coil unit facing the third magnet unit.

15 . The lens driving device according to claim 14 , wherein the first coil is not disposed between the bobbin and the first magnet unit.

16 . The lens driving device according to claim 15 , wherein the first coil is not disposed between the bobbin and the dummy member.

17 . The lens driving device according to claim 11 , wherein the first magnet unit is a 2-pole magnet, and the second magnet unit and the third magnet unit are 4-pole magnets.

18 . The lens driving device according to claim 11 , comprising a dummy member disposed on the second side part of the housing.

19 . The lens driving device according to claim 18 , wherein the second coil is not disposed between the dummy member and the substrate.

20 . The lens driving device according to claim 11 , wherein the first coil comprises a connecting portion connecting the first coil unit and the second coil unit, and wherein the connecting portion of the first coil is disposed between the first magnet unit and the bobbin or disposed between the dummy member and the bobbin.

21 . The lens driving device according to claim 12 , wherein the first coil comprises a first coil unit facing the second magnet unit in a horizontal direction, and a second coil unit facing the third magnet unit in the horizontal direction, and
Wherein the second coil comprises a third coil unit facing the first magnet unit in a vertical direction, a fourth coil unit facing the second magnet unit in the vertical direction, and a fifth coil unit facing the third magnet unit in the vertical direction.

22 . The lens driving device according to claim 21 , wherein the bobbin comprises a first protrusion and a second protrusion disposed on the opposite side of the first protrusion, and wherein the first coil unit is disposed to surround the first protrusion, and the second coil unit is disposed to surround the second protrusion.

23 . The lens driving device according to claim 11 , wherein the substrate comprises a hole, and
wherein the hole of the substrate is formed closer to one side surface of the substrate.

24 . The lens driving device according to claim 23 , wherein the one side of the substrate is adjacent to the dummy member.

25 . The lens driving device according to claim 11 , wherein the second magnet unit and the third magnet unit move the bobbin in the optical axis direction, and
wherein the first magnet unit, the second magnet unit, and the third magnet unit move the housing in a direction perpendicular to the optical axis direction.

26 . The lens driving device according claim 11 , wherein each of the second magnet unit and the third magnet unit comprises a first surface facing the first coil, and
wherein the first surface has two polarities.

27 . The lens driving device according to claim 26 , wherein each of the first magnet unit to the third magnet unit comprises a second surface facing the second coil, and wherein the second surface has two polarities.

28 . The lens driving device according to claim 11 , wherein the first coil unit and the second coil unit have at least any one shape among an elliptical shape, a track shape, and a closed curve shape.

29 . The lens driving device according to claim 11 , comprising:
an upper elastic member disposed on the bobbin and coupled to the bobbin and the housing; and a support member coupled to the upper elastic member and the substrate, wherein the first coil unit and the second coil unit are electrically connected, wherein the upper elastic member comprises a first upper elastic unit and a second upper elastic unit that are spaced apart from each other, and wherein one side end portion of the first coil unit is coupled to the first upper elastic unit and one side end portion of the second coil may be coupled to the second upper elastic unit.

30 . A camera module comprising:
a first lens driving device according to claim 11 ; and a second lens driving device adjacent to the first lens driving device, wherein the second lens driving device is disposed adjacent to the fourth side part of the housing of the first lens driving device, wherein the second lens driving device comprises:
a housing;
a bobbin disposed in the housing of the second lens driving device;
a third coil disposed on an outer circumferential surface of the bobbin of the second lens driving device;
a magnet disposed in the housing of the second lens driving device and facing the third coil; and
a fourth coil facing the magnet of the second lens driving device,
wherein the magnet of the second lens driving device comprises four magnet units disposed at the corners of the housing of the second lens driving device.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Kap Jin
• Oh Jung Seok

Classifications

• G02B27/646

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• G03B17/12

  with means for supporting objectives, supplementary lenses, filters, masks, or turrets · CPC title

• G03B2205/0069

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

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H04N5/2253

  Electricity · mapped topic