Actuator device

Patent metadata

Field	Value
Publication number	US-12587079-B2
Application number	US-202218562544-A
Country	US
Kind code	B2
Filing date	May 13, 2022
Priority date	May 21, 2021
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

An embodiment of the present invention relates to an actuator device comprising: a housing; a holder which is disposed in the housing; a reflective member which is disposed in the holder; a first drive unit which tilts the holder about a first axis; a first attractive member which is disposed in the holder; and a second attractive member which is disposed in the housing and has attraction with the first attractive member, wherein a first imaginary straight line connecting the center of the first attractive member to the center of the second attractive member is spaced apart from a second imaginary straight line passing through the first axis and parallel to the first straight line.

First claim

What is claimed is:

1 . An actuator device comprising:
a housing; a holder disposed in the housing; a reflective member disposed on the holder; a first drive unit configured to tilt the holder about a first axis; a first attractive member disposed on the holder; and a second attractive member disposed on the housing and configured to act an attractive force with the first attractive member, wherein an imaginary first straight line connecting a center of the first attractive member and a center of the second attractive member is spaced apart from an imaginary second straight line passing through the first axis and parallel with the first straight line.

2 . The actuator device of claim 1 , wherein light is incident on an upper surface of the reflective member, and
wherein the first straight line is disposed higher than the second straight line.

3 . The actuator device of claim 1 , wherein the first straight line is spaced apart from the second straight line in a first direction, and
wherein the first straight line is overlapped with the second straight line in the first direction.

4 . The actuator device of claim 3 , comprising a second drive unit configured to tilt the holder about a second axis perpendicular to the first axis.

5 . The actuator device of claim 4 , wherein the second axis is parallel with the first direction.

6 . The actuator device of claim 1 , wherein the center of the first attractive member is disposed at a same height as the center of the second attractive member.

7 . The actuator device of claim 1 , wherein each of the first attractive member and the second attractive member comprises a magnet.

8 . The actuator device of claim 1 , wherein any one of the first attractive member and the second attractive member comprises a magnet, and the other comprises a metal yoke.

9 . The actuator device of claim 1 , wherein the first drive unit comprises a first driving magnet and a first coil, and
wherein in an initial state when no current is applied to the first coil, the holder is contacted with the housing.

10 . The actuator device of claim 9 , wherein the housing comprises a first portion disposed above the holder, and
wherein, in the initial state, the holder is contacted with the first portion of the housing.

11 . The actuator device of claim 9 , wherein a first direction drive current is applied to the first coil to tilt the holder, and
wherein a second direction drive current opposite to the first direction drive current is not used to tilt the holder.

12 . The actuator device of claim 1 , comprising a moving plate disposed between the housing and the holder,
wherein the moving plate comprises a protrusion disposed on the holder, and wherein the first axis is formed by the protrusion of the moving plate.

13 . The actuator device of claim 1 , comprising a moving plate disposed between the housing and the holder,
wherein the moving plate comprises a hole, wherein the housing comprises a protruding portion protruding toward the holder, and at least a portion of the protruding portion is disposed on the hole of the moving plate, and wherein the second attractive member is disposed on the protruding portion of the housing.

14 . 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 of the actuator device and the image sensor.

15 . An optical device comprising:
a main body; the camera device of claim 14 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.

16 . An actuator device comprising:
a housing; a holder disposed in the housing; a reflective member disposed on the holder; a first drive unit configured to tilt the holder about a first axis; a first attractive member disposed on the holder; and a second attractive member disposed on the housing and configured to act an attractive force with the first attractive member, wherein in an initial state when no current is applied to the first drive unit, the holder is contacted with the housing.

17 . The actuator device of claim 16 , wherein the housing comprises a first portion disposed above the holder, and
wherein, in the initial state, the holder is contacted with the first portion of the housing.

18 . The actuator device of claim 16 , wherein an imaginary first straight line connecting a center of the first attractive member and a center of the second attractive member is spaced apart from an imaginary second straight line passing through the first axis and parallel with the first straight line.

19 . The actuator device of claim 18 , wherein the first straight line is spaced apart from the second straight line in a first direction, and
wherein the first straight line is overlapped with the second straight line in the first direction.

20 . An actuator device comprising:
a housing; a holder disposed in the housing; a reflective member disposed on the holder; a moving plate disposed between the housing and the holder; a driving magnet and a first coil configured to tilt the holder about a first axis; a first magnet disposed on the holder; and a second magnet disposed on the housing at a position corresponding with the first magnet, wherein a first surface of the first magnet and a first surface of the second magnet face each other and have different polarities, and wherein an imaginary first straight line connecting a center of the first magnet and a center of the second magnet is spaced apart from an imaginary second straight line passing through the first axis and parallel with the first straight line.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Sung Guk

Classifications

• H04N23/55

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

• H04N23/12

  with one sensor only · CPC title

• H04N23/51

  Housings · CPC title

• H04N23/54

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

• H02K2201/18

  Machines moving with multiple degrees of freedom · CPC title