Camera actuator, and camera device and optical device comprising same

Patent metadata

Field	Value
Publication number	US-12556789-B2
Application number	US-202218286396-A
Country	US
Kind code	B2
Filing date	Apr 14, 2022
Priority date	Apr 15, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

Disclosed in an embodiment of the present invention is a camera actuator comprising: a housing; a first lens assembly and a second lens assembly, moving in an optical axis direction with respect to the housing; and a driver unit for moving the first lens assembly and the second lens assembly, wherein the driver unit comprises: a driver coil; and a driver magnet facing the driver coil, and the driver coil comprises: a first pattern area; and a second pattern area arranged in a direction perpendicular to the first pattern area, wherein a width of the first pattern area differs from a width of the second pattern area.

First claim

The invention claimed is:

1 . A camera actuator, comprising:
a housing; a first lens assembly and a second lens assembly configured to move in an optical axis direction based on the housing; and a driving unit configured to move the first lens assembly and the second lens assembly, wherein the driving unit includes a driving coil and a driving magnet facing the driving coil, wherein the driving coil includes a first pattern area and a second pattern area disposed in a direction perpendicular to the first pattern area, and wherein a width of the driving coil in the first pattern area differs from a width of the driving coil in the second pattern area.

2 . The camera actuator of claim 1 , wherein the driving coil includes:
a third pattern area facing the first pattern area; and a fourth pattern area facing the second pattern area, and wherein a width of the driving coil in the fourth pattern area is larger than a width of the driving coil in the third pattern area.

3 . The camera actuator of claim 2 , wherein the driving coil includes a curve pattern area connecting the first pattern area to the second pattern area.

4 . The camera actuator of claim 3 , wherein the curve pattern area includes a first curve pattern area to a fourth curve pattern area.

5 . The camera actuator of claim 1 , wherein the width of the driving coil in the first pattern area is smaller than the width of the driving coil in the second pattern area.

6 . The camera actuator of claim 1 , wherein the driving coil is formed with a plurality of turns.

7 . The camera actuator of claim 6 , wherein the width of the driving coil in the first pattern area is smaller than the width of the driving coil in the second pattern area.

8 . The camera actuator of claim 4 , wherein the first pattern area is disposed at one side, wherein the second pattern area is disposed to be spaced apart from the first pattern area, and wherein the third pattern area is disposed to be spaced apart from the fourth pattern area.

9 . The camera actuator of claim 8 , wherein an innermost turn among a plurality of turns of the driving coil has a first point which is one end of any one of the first pattern area or the third pattern area, wherein an outermost turn among the plurality of turns of the driving coil has a second point which is one end of any one of the first pattern area or the third pattern area, and wherein a virtual line connecting the first point to the second point is inclined at a first angle with respect to an optical axis.

10 . The camera actuator of claim 9 , wherein the first curve pattern area is an area in which a width of the driving coil in the first curved area is changed, and wherein a first angle between a first boundary line in contact with the first pattern area and a second boundary line in contact with the second pattern area is in a range of 20 to 45 degrees.

11 . The camera actuator of claim 9 , wherein the first angle may be in a range of 20 to 45 degrees.

12 . The camera actuator of claim 1 , wherein a maximum moving distance of the driving magnet may be larger than or equal to the width of the driving coil in the second pattern area.

13 . The camera actuator of claim 1 , wherein a ratio of the width of the driving coil in the first pattern area to the width of the driving coil in the second pattern area may be in a range of 1:1.5 to 1:4.5.

14 . The camera actuator of claim 13 , wherein the width of the driving coil in the first pattern area may be a length in a vertical direction between an innermost turn and an outermost turn among the plurality of turns in the driving coil in the first pattern area, and the width of the driving coil in the second pattern area may be a length in an optical axis direction between an innermost turn and an outermost turn among the plurality of turns in the driving coil in the second pattern area.

15 . The camera actuator of claim 2 , wherein a ratio of a first width to a second width may be in a range of 1:1.5 to 1:4, wherein the first width may be a distance in a vertical direction between the outermost turn among the plurality of turns in the driving coil in the first pattern area and the outermost turn among the plurality of turns in the driving coil in the third pattern area, and wherein the second width may be a distance in the optical axis direction between the outermost turn among the plurality of turns in the driving coil in the second pattern area and the outermost turn among the plurality of turns in the driving coil in the fourth pattern area.

16 . The camera actuator of claim 2 , wherein a ratio of a third width to a fourth width may be in a range of 1:1.5 to 1:2.5, wherein the third width may be a distance in a vertical direction between the innermost turn among the plurality of turns in the driving coil in the first pattern area and the innermost turn among the plurality of turns in the driving coil in the second pattern area, and wherein the fourth width may be a distance in the optical axis direction between the innermost turn among the plurality of turns in the driving coil in the third pattern area and the innermost turn among the plurality of turns in the driving coil in the fourth pattern area.

17 . The camera actuator of claim 3 , wherein a width of the driving coil in the curve pattern area may decrease as the width approaches the first pattern area or the third pattern area.

18 . The camera actuator of claim 1 , wherein a surface of the driving magnet facing the driving coil may include a first magnet area having a first polarity, and a second magnet area having a second polarity, and the first polarity may be opposite to the second polarity.

19 . The camera actuator of claim 18 , wherein the first magnet area and the second magnet area may be spaced apart from each other in the optical axis direction.

20 . The camera actuator of claim 19 , wherein lengths of the first magnet area and the second magnet area in a vertical direction may be smaller than a length of the second pattern area in the vertical direction.

Assignees

• Lg Innotek Co Ltd

Inventors

• Min Sang Jun
• Jung Tae Jin

Classifications

• G03B17/17

  with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H04N23/687

  by shifting the lens or sensor position · 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