Lens moving apparatus, and camera module and optical instrument comprising same

Patent metadata

Field	Value
Publication number	US-2021294067-A1
Application number	US-201716338328-A
Country	US
Kind code	A1
Filing date	Sep 26, 2017
Priority date	Sep 30, 2016
Publication date	Sep 23, 2021
Grant date	—

Abstract

An embodiment comprises: a housing comprising side parts, a first corner part, a second corner part, a third corner part, and a fourth corner part, in which each of the first corner part, the second corner part, the third corner part and the fourth corner is disposed between two adjacent side parts; a bobbin disposed in the housing; a first coil disposed on an outer surface of the bobbin; first magnets disposed on the side parts of the housing; a first circuit board disposed on the first corner part and comprising a first pad, a second pad, a third pad, a fourth pad, a fifth pad and a sixth pad; a first location sensor disposed on the first circuit board and electrically connected to the first pad, the second pad, the third pad, the fourth pad, the fifth pad and the sixth pad; first, second, third and fourth upper springs disposed apart from each other on the housing; and first and second lower springs coupled to a lower portion of the housing, electrically connected with the first coil, and coupled to the fifth and sixth pads, wherein each of the first to fourth upper springs is coupled to a corresponding one of the first to fourth pads in the first corner part.

First claim

1 . A lens moving apparatus comprising:
a housing having side portions, a first corner portion, a second corner portion, a third corner portion, and a fourth corner portion, each of the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion being disposed between two adjacent side portions; a bobbin disposed in the housing; a first coil disposed on an external surface of the bobbin; first magnets disposed on the side portions of the housing; a first circuit board disposed at the first corner portion and comprising a first pad, a second pad, a third pad, a fourth pad, a fifth pad, and a sixth pad; a first position sensor disposed on the first circuit board and electrically connected to the first pad, the second pad, the third pad, the fourth pad, the fifth pad, and the sixth pad; a first upper spring, a second upper spring, a third upper spring, and a fourth upper spring, which are disposed to be spaced apart from each other on the housing; and first and second lower springs coupled to a lower portion of the housing, electrically connected to the first coil, and coupled to the fifth and sixth pads, wherein each of the first to fourth upper springs is coupled to a corresponding one of the first to fourth pads at the first corner portion.

2 . The lens moving apparatus of claim 1 , comprising a fifth upper spring disposed at the fourth corner portion,
wherein: the first and second upper springs are disposed at the first corner portion and are coupled to a corresponding one of the first and second pads; the third upper spring is disposed at the second corner portion and is coupled to the third pad; the fourth upper spring is disposed at the third corner portion and is coupled to the fourth pad; and the fourth corner portion diagonally faces the first corner portion.

3 . The lens moving apparatus of claim 2 , comprising:
a second circuit board disposed below the first and second lower springs; first and second supporting members disposed at the first corner portion and configured to connect a corresponding one of the first and second upper springs to the second circuit board; at least one third supporting member disposed at the second corner portion and configured to connect the third upper spring to the second circuit board; at least one fourth supporting member disposed at the third corner portion and configured to connect the fourth upper spring to the second circuit board; and at least one fifth supporting member disposed at the fourth corner portion and configured to connect the fifth upper spring to the second circuit board, wherein each of the third to fifth supporting members includes two supporting members that are spaced apart from each other.

4 . The lens moving apparatus of claim 3 , wherein:
each of the first and second lower springs includes a second internal frame coupled to the bobbin, a second external frame coupled to the housing, and a second frame connecting portion configured to connect the second internal frame to the second external frame; and each of the fifth and sixth pads is coupled to a corresponding one of second external frames of the first and second lower springs.

5 . The lens moving apparatus of claim 1 , wherein:
the first upper spring is disposed at the first corner portion; the second upper spring is disposed at the second corner portion; the third upper spring is disposed at the third corner portion; the fourth upper spring is disposed at the fourth corner portion; and the fourth corner portion diagonally faces the first corner portion.

6 . The lens moving apparatus of claim 5 , wherein:
one end of the second upper spring extends to the first corner portion from the second corner portion; one end of the third upper spring extends to the first corner portion from the third corner portion; one end of the fourth upper spring extends to the first corner portion from the fourth corner portion; and one end of each of the first upper spring, the second upper spring, the third upper spring, and the fourth upper spring is coupled to a corresponding one of the first pad, the second pad, the third pad, and the fourth pad.

7 . The lens moving apparatus of claim 6 , comprising:
a second circuit board disposed below the first and second lower springs; a first supporting member disposed at the first corner portion and coupled between the first upper spring and the second circuit board; a second supporting member disposed at the second corner portion and coupled between the second upper spring and the second circuit board; a third supporting member disposed at the third corner portion and coupled between the third upper spring and the second circuit board; and a fourth supporting member disposed at the fourth corner portion and coupled between the fourth upper spring and the second circuit board.

8 . The lens moving apparatus of claim 1 , wherein the first position sensor transmits signals for data communication to the circuit board or receives the signals from the circuit board through the first to fourth pads, and provides a driving signal to the first coil through the fifth and sixth pads.

9 . The lens moving apparatus of claim 7 , wherein each of the first to fourth upper springs includes an external frame coupled to the housing; and
wherein the external frame includes: a first coupling portion coupled to a corresponding one of the first to fourth corner portions; a second coupling portion coupled to a corresponding one of the first to fourth supporting members; and at least one connecting portion configured to connect the first coupling portion to the second coupling portion.

10 . The lens moving apparatus of claim 9 , wherein the fourth upper spring includes:
a (1-1) th external frame coupled to the first corner portion and a (1-2) th external frame coupled to the fourth corner portion; two first internal frames coupled to the bobbin; first frame connecting portions configured to connect the (1-1) th and (1-2) th external frames to the two first internal frames; and a connecting frame configured to connect the two first internal frames to each other.

11 . The lens moving apparatus of claim 1 , wherein the first circuit board comprises:
a body having a front surface on which the first position sensor is disposed; and first and second protrusions bent at an upper surface of the body, wherein the first to fourth pads are disposed on the upper surface of the body and the first and second protrusions, and the fifth and sixth pads are disposed on a lower surface of the body.

12 . The lens moving apparatus of claim 11 , wherein the body is disposed in parallel to an internal surface of the first corner portion of the housing, and the first and second protrusions protrude in a direction toward a rear surface of the body from the front surface of the body based on the rear surface of the body.

13 . The lens moving apparatus of claim 12 , wherein the body comprises an upper end and a lower end, and the upper end of the body includes a portion having a length in a horizontal direction, which is reduced in a downward direction from the above.

14 . The lens moving apparatus of claim 13 , wherein a groove is provided at the first corner portion of the housing, and the body is disposed in the groove.

15 . The lens moving apparatus of claim 10 , wherein the connecting frame is configured to surround at least a portion of an upper side of the external surface of the bobbin.

16 . The lens moving apparatus of claim 10 , wherein the connecting frame is c

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Sang Ok
• Min Sang Jun
• Son Byung Wook

Classifications

• H02K33/18

  with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets · CPC title

• G03B2205/0069

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

• G03B30/00

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title

• G03B13/36

  Autofocus systems · CPC title

• G03B5/00

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