Optical element driving mechanism

Patent metadata

Field	Value
Publication number	US-12585165-B2
Application number	US-202218089075-A
Country	US
Kind code	B2
Filing date	Dec 27, 2022
Priority date	Dec 27, 2021
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

An optical element driving mechanism used for driving an optical element is provided. The optical element driving mechanism includes a fixed portion and a support assembly. The optical element is movable in a first dimension relative to the fixed portion through the support assembly.

First claim

What is claimed is:

1 . An optical element driving mechanism used for driving an optical element, comprising:
a fixed portion; a support assembly, wherein the optical element is movable relative to the fixed portion in a first dimension through the support assembly, and the support assembly comprises: a first fixed end affixed on the optical element; a second fixed end affixed on the fixed portion; an intermediate connecting portion between the first fixed end and the second fixed end, comprising:
a third portion extending in a direction parallel to the first axis;
a fourth portion extending in the direction parallel to the first axis;
a first dodging portion positioned at the third portion and corresponding to the first fixed end; and
a second dodging portion positioned at the fourth portion and corresponding to the first fixed end, wherein in a top view, the optical element is disposed between the first dodging portion and the second dodging portion, and the first dodging portion and the second dodging portion recessed in directions away from the optical element;
a first resilient portion, wherein the intermediate connecting portion movably connects to the second fixed end through the first resilient portion; a second resilient portion, wherein the first fixed end movably connects to the intermediate connecting portion through the second resilient portion; a third resilient portion, wherein the intermediate connecting portion movably connects to the second fixed end through the third resilient portion; and a driving assembly configured to drive the support assembly relative to the fixed portion.

2 . The optical element driving mechanism as claimed in claim 1 ,
wherein the driving assembly comprises: a coil; a first magnetic element corresponding to the coil; and a second magnetic element corresponding to the coil; wherein: the first dimension is rotation relative to a first rotational axis; the first rotational axis is parallel to a first axis; the first magnetic element and the second magnetic element are arranged along a second axis; and the second axis is perpendicular to the first axis.

3 . The optical element driving mechanism as claimed in claim 2 , wherein:
a winding axis of the coil is parallel to a third axis; the first axis, the second axis, and the third axis are perpendicular with each other; the coil comprises a first segment extending along the first axis and corresponding to the first magnetic element; the first magnetic element comprises a first magnetic element surface facing the second magnetic element; and the first segment at least partially overlaps the first magnetic element surface when viewed in a first direction.

4 . The optical element driving mechanism as claimed in claim 3 , wherein the driving assembly further comprises:
a third magnetic element corresponding to the coil; and a fourth magnetic element corresponding to the coil; wherein: the third magnetic element corresponds to the first segment; the fourth magnetic element corresponds to the first segment; and the third magnetic element and the fourth magnetic element are arranged in a direction that is parallel to the first axis.

5 . The optical element driving mechanism as claimed in claim 4 , wherein:
at least a portion of the third magnetic element overlaps the first magnetic element when viewed in the first direction; at least a portion of the fourth magnetic element overlaps the first magnetic element when viewed in the first direction; a third magnetic element surface of the third magnetic element and the first magnetic element surface face in an identical direction; and at least a portion of the first segment overlaps the third magnetic element surface when viewed in the first direction.

6 . The optical element driving mechanism as claimed in claim 5 , wherein:
the support assembly is between the first magnetic element and the third magnetic element when viewed along the first axis; a center of the first magnetic element and a center of the third magnetic element do not overlap each other when viewed in the first direction; in the first axis, a maximum size of the first magnetic element is different from a maximum size of the third magnetic element; in the second axis, a maximum size of the first magnetic element is different from a maximum size of the third magnetic element; and in the third axis, a maximum size of the first magnetic element is different from a maximum size of the third magnetic element.

7 . The optical element driving mechanism as claimed in claim 6 , wherein:
in the first axis, the maximum size of the first magnetic element is greater than the maximum size of the third magnetic element; in the second axis, the maximum size of the first magnetic element is greater than the maximum size of the third magnetic element; and in the third axis, the maximum size of the first magnetic element is greater than the maximum size of the third magnetic element.

8 . The optical element driving mechanism as claimed in claim 7 , wherein:
an N pole and a S pole of the first magnetic element are arranged in a first pole direction; the first pole direction is parallel to the third axis; an N pole and a S pole of the second magnetic element are arranged in a direction parallel to the first pole direction; and an N pole and a S pole of the third magnetic element are arranged in a direction parallel to the first pole direction.

9 . The optical element driving mechanism as claimed in claim 8 , wherein:
the N pole and the S pole of the second magnetic element are arranged in a direction opposite to the first pole direction; the N pole and the S pole of the third magnetic element are arranged in a direction identical to the first pole direction; and at least a portion of the third magnetic element protrudes from the first magnetic element and does not overlap the first magnetic element when viewed in the first direction.

10 . The optical element driving mechanism as claimed in claim 9 , wherein:
the first resilient portion and the second resilient portion have different elastic coefficients; the support assembly is plate-shaped; and the intermediate connecting portion further comprises:
a first portion extending in a direction parallel to the second axis;
a second portion extending in the direction parallel to the second axis.

11 . The optical element driving mechanism as claimed in claim 10 , wherein:
the intermediate connecting portion surrounds the first fixed end; the first dodging portion has a concave structure; the first dodging portion and the second dodging portion are arranged in a direction parallel to the second axis; and the first portion connects to the second portion through the third portion and the fourth portion.

12 . The optical element driving mechanism as claimed in claim 11 , wherein the fixed portion comprises:
a bottom; and a case affixed on the bottom; wherein: the elastic coefficient of the first resilient portion is less than the elastic coefficient of the second resilient portion; the first magnetic element is affixed on the bottom; and the third magnetic element is affixed on the case.

13 . The optical element driving mechanism as claimed in claim 12 , wherein the bottom comprises:
a first recess, wherein the optical element at least partially overlaps the first recess when viewed in the first direction; a second recess used for accommodating the first magnetic element; a third recess used for accommodating the second magnetic element; a fourth recess, wherein the first resilient portion at least pa

Assignees

• Tdk Taiwan Corp

Inventors

• Wu Ya-Hsiu
• Chen Yi-Ho
• Wang Ying-Jen

Classifications

• H02K41/0354

  Lorentz force motors, e.g. voice coil motors · CPC title

• G02B27/0006

  with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B) · CPC title

• G02B7/08

  adapted to co-operate with a remote control mechanism · CPC title

• G03B2205/0069

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

• 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