Actuator device

Patent metadata

Field	Value
Publication number	US-12549856-B2
Application number	US-202218551094-A
Country	US
Kind code	B2
Filing date	Mar 24, 2022
Priority date	Mar 24, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

The actuator device according to the present embodiment comprises: a holder; a reflective member disposed on the holder; a rigid mover coupled to the holder; a first magnet disposed on the rigid mover; a second magnet generating a repulsive force with the first magnet; and a first driving magnet for tilting the holder, wherein the first driving magnet comprises a first surface in a direction directing toward the reflective member, wherein the second magnet comprises a first surface in a direction directing toward the reflective member, wherein the first surface of the first driving magnet comprises a first region that is the most adjacent to the second magnet, and wherein a first region of the first driving magnet having a polarity different from that of the first surface of the second magnet.

First claim

The invention claimed is:

1 . An actuator device comprising:
a holder; a reflective member disposed on the holder; a rigid mover coupled to the holder; a first magnet disposed on the rigid mover; a second magnet configured to generate a repulsive force with the first magnet; and a first driving magnet configured to tilt the holder, wherein the first driving magnet comprises a first surface in a direction toward the reflective member, wherein the second magnet comprises a first surface in a direction toward the reflective member, wherein the first surface of the first driving magnet comprises a first region that is the most adjacent to the second magnet, and wherein the first region of the first driving magnet has a polarity different from that of the first surface of the second magnet.

2 . The actuator device of claim 1 , wherein the first surface of the first driving magnet comprises a second region having a polarity different from that of the first region.

3 . The actuator device of claim 2 , wherein the first driving magnet comprises a second surface opposite to the first surface of the first driving magnet, and
wherein the second surface of the first driving magnet comprises a third region having a polarity different from that of the first region and a fourth region having a polarity different from that of the second region.

4 . The actuator device of claim 1 , comprising:
a housing; and a moving plate disposed between the housing and the holder, wherein the second magnet is disposed on the housing.

5 . The actuator device of claim 1 , wherein a size of the first magnet is different from a size of the second magnet.

6 . The actuator device of claim 4 , wherein a central axis of the first magnet is disposed to be eccentric with a central axis of the moving plate with respect to a first optical axis.

7 . The actuator device of claim 4 , wherein the rigid mover comprises a protruding portion coupled to the housing by a damper.

8 . The actuator device of claim 3 , wherein the first driving magnet comprises a neutral portion disposed between the first region and the second region.

9 . The actuator device of claim 3 , comprising a first coil configured to interact with the first driving magnet,
wherein the second surface of the first driving magnet faces the first coil.

10 . An actuator device comprising:
a fixed part; a moving part configured to move with respect to the fixed part; a first magnet disposed on the moving part; a second magnet configured to generate a repulsive force with the first magnet; and a first driving magnet configured to tilt the moving part, wherein the second magnet comprises a first surface opposite to a surface facing the first magnet, and wherein a region of the first driving magnet that is the most adjacent to the first surface of the second magnet has a polarity configured to generate an attractive force with the first surface of the second magnet.

11 . The actuator device of claim 1 , wherein the second magnet comprises a second surface disposed at an opposite side of the first surface of the second magnet,
wherein the first magnet comprises a first surface facing the second surface of the second magnet, and wherein the first surface of the first magnet has a same polarity as the second surface of the second magnet.

12 . The actuator device of claim 1 , wherein the second magnet is disposed so as not to be overlapped with the first driving magnet in a direction to which the first surface of the first driving magnet faces.

13 . The actuator device of claim 1 , wherein the second magnet is disposed so as not to be overlapped with the first driving magnet in a direction to which the first surface of the second magnet faces.

14 . The actuator device of claim 2 , wherein the first region of the first driving magnet has an S pole, and
wherein the second region of the first driving magnet has an N pole.

15 . The actuator device of claim 1 , wherein the holder comprises a groove concavely formed on a lower surface of the holder, and
wherein at least a portion of the first driving magnet is disposed on the groove of the holder.

16 . The actuator device of claim 9 , wherein the first driving magnet and the first coil are configured to tilt the holder with respect to a first axis.

17 . The actuator device of claim 16 , comprising a second driving magnet and a second coil configured to tilt the holder with respect to a second axis perpendicular to the first axis,
wherein the second driving magnet is disposed on both side surfaces of the holder.

18 . A camera device comprising:
a printed circuit board; an image sensor disposed on the printed circuit board; the actuator device of claim 1 ; and a lens disposed on an optical path formed by the reflective member and the image sensor of the actuator device.

19 . An optical device comprising:
a main body; the camera device of claim 18 disposed on the main body; and a display disposed on the main body and configured to output at least one of a video and an image photographed by the camera device.

20 . An actuator device comprising:
a fixed part; a moving part configured to move with respect to the fixed part; a magnet disposed on the fixed part and configured to generate a repulsive force with the moving part; and a driving magnet configured to drive the moving part, wherein a first surface of the magnet and a first region of the driving magnet that is the most adjacent to the first surface of the magnet are configured to generate an attractive force with each other.

Assignees

• Lg Innotek Co Ltd

Inventors

• You Jeong Gi
• Kwon Han Ul
• Lee Hyun Joong

Classifications

• H01F2007/1692

  Electromagnets or actuators with two coils · CPC title

• H01F7/064

  Circuit arrangements for actuating electromagnets (circuit arrangements for obtaining special operating characteristics H01F7/18; driving circuits for electromagnets making use of a switching regulator H01H47/325) · CPC title

• H04N23/55

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

• H04N23/632

  for displaying or modifying preview images prior to image capturing, e.g. variety of image resolutions or capturing parameters · CPC title

• H04N23/54

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