Optical element driving mechanism

Patent metadata

Field	Value
Publication number	US-11536923-B2
Application number	US-202016844120-A
Country	US
Kind code	B2
Filing date	Apr 9, 2020
Priority date	Jun 14, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

An optical element driving mechanism is provided. The optical element driving mechanism includes a fixed portion, a movable portion, and a driving assembly. The fixed portion includes a limiting portion. The movable portion is movably disposed on the fixed portion and includes an optical element and a connecting assembly. The optical element has a main axis. The connecting assembly is connected to the optical element. The driving assembly is at least partially disposed on the fixed portion, wherein the limiting portion is used for limiting the range of motion of the movable portion relative to the fixed portion.

First claim

What is claimed is:

1. An optical element driving mechanism, comprising:
a fixed portion comprising a limiting portion;
a movable portion movably disposed on the fixed portion and comprising:
an optical element having a main axis; and
a connecting assembly connected to the optical element; and

a driving assembly at least partially disposed on the fixed portion, wherein the limiting portion is used for limiting a range of motion of the movable portion relative to the fixed portion,
wherein the driving assembly comprises:
a magnetic element; and
a magnetic permeable element disposed in the magnetic element, wherein the main axis does not pass through the magnetic permeable element.

2. The optical element driving mechanism as claimed in claim 1 , wherein the connecting assembly further comprises:
a rotation element rotating around a rotational axis;
a first connecting element; and
a second connecting element, wherein the rotation element and the second connecting element are connected to the first connecting element.

3. The optical element driving mechanism as claimed in claim 2 , wherein the rotational axis does not pass through where the rotation element is connected to the first connecting element.

4. The optical element driving mechanism as claimed in claim 2 , wherein the second connecting element at least partially overlaps the rotation element along the main axis during an open condition.

5. The optical element driving mechanism as claimed in claim 4 , wherein the rotational axis does not pass through the second connecting element during the open condition.

6. The optical element driving mechanism as claimed in claim 2 , wherein the main axis and the rotational axis do not intersect.

7. The optical element driving mechanism as claimed in claim 1 , further comprising a circuit at least partially embedded in the fixed portion.

8. The optical element driving mechanism as claimed in claim 7 , wherein the circuit is exposed from a side of the fixed portion that faces the optical element.

9. The optical element driving mechanism as claimed in claim 1 , wherein a gap is formed between the magnetic element and the fixed portion in a first direction that is perpendicular to the main axis.

10. The optical element driving mechanism as claimed in claim 9 , wherein the magnetic permeable element extends in the first direction.

11. The optical element driving mechanism as claimed in claim 1 , wherein the fixed portion comprises:
a base;
a case disposed on the base; and
an extending element disposed on the base, wherein the extending element has an opening, and the main axis passes through the opening.

12. The optical element driving mechanism as claimed in claim 11 , wherein the extending element is exposed from the case when viewed in a second direction that is perpendicular to the main axis.

13. The optical element driving mechanism as claimed in claim 11 , wherein the base has a recess on a side facing away from the case.

14. The optical element driving mechanism as claimed in claim 11 , wherein the size of the opening is less than the size of the driving assembly.

15. The optical element driving mechanism as claimed in claim 11 , wherein the size of the optical element is greater than the size of the opening in a second direction that is perpendicular to the main axis.

16. The optical element driving mechanism as claimed in claim 1 , wherein a mode of motion of the optical element is different than a mode of motion of the connecting assembly.

17. The optical element driving mechanism as claimed in claim 1 , further comprising an optical module, wherein the optical module and the driving assembly are arranged in a first direction that is perpendicular to the main axis.

18. The optical element driving mechanism as claimed in claim 17 , wherein the optical module has a rectangular shape.

19. The optical element driving mechanism as claimed in claim 17 , wherein the optical module and the fixed portion at least partially overlap each other in the first direction.

20. An optical element driving mechanism, comprising:
a fixed portion comprising a limiting portion;
a movable portion movably disposed on the fixed portion and comprising:
an optical element having a main axis; and
a connecting assembly connected to the optical element;

a driving assembly at least partially disposed on the fixed portion, wherein the limiting portion is used for limiting a range of motion of the movable portion relative to the fixed portion; and
a circuit at least partially embedded in the fixed portion.

Assignees

• Tdk Taiwan Corp

Inventors

• Wang Chao-Hsi
• Hu Chao-Chang
• Weng Chih-Wei
• Tsai Kuen-Wang

Classifications

• G03B5/02

  Lateral adjustment of lens · CPC title

• H02N2/025

  Inertial sliding motors · CPC title

• H04N23/55

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

• G02B7/005 Primary

  Motorised alignment · CPC title

• G03B2205/0069

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