Driving mechanism for optical element

Patent metadata

Field	Value
Publication number	US-11360284-B2
Application number	US-202016844206-A
Country	US
Kind code	B2
Filing date	Apr 9, 2020
Priority date	Jun 14, 2019
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion, a fixed portion, a driving assembly, and a support element. The movable portion is used for connecting to an optical element having a main axis. The movable portion is movable relative to the fixed portion. The driving assembly is disposed on the fixed portion or the movable portion. The driving assembly is used to drive the movable portion to move relative to the fixed portion. The movable portion is connected to the fixed portion through the support element.

First claim

What is claimed is:

1. An optical element driving mechanism, comprising:
a movable portion for connecting to an optical element having a main axis;
a fixed portion, wherein the movable portion is movable relative to the fixed portion;
a driving assembly disposed on the fixed portion or the movable portion, used for driving the movable portion to move relative to the fixed portion, wherein the driving assembly comprises:
a first magnetic element disposed on the movable portion; and
a second magnetic element disposed on the fixed portion, wherein the first magnetic element and the second magnetic element at least partially overlap each other when viewed in a direction that is perpendicular to the main axis; and

a support element, wherein the movable portion is connected to the fixed portion through the support element.

2. The optical element driving mechanism as claimed in claim 1 , further comprising a circuit board, and the second magnetic element is disposed on the circuit board.

3. The optical element driving mechanism as claimed in claim 2 , wherein the circuit board and the first magnetic element are separated from each other by a distance.

4. The optical element driving mechanism as claimed in claim 2 , further comprising a position sensor, wherein the driving assembly and the position sensor are positioned on opposite sides of the circuit board.

5. The optical element driving mechanism as claimed in claim 4 , wherein the fixed portion comprises a base, the base has an opening, and the position sensor is disposed in the opening.

6. The optical element driving mechanism as claimed in claim 5 , wherein the thickness of the position sensor is less than the thickness of the base along the main axis.

7. The optical element driving mechanism as claimed in claim 2 , wherein the circuit board comprises magnetic permeable material.

8. The optical element driving mechanism as claimed in claim 2 , further comprising a resilient element, wherein the circuit board and the resilient element are disposed on different sides of the fixed portion.

9. The optical element driving mechanism as claimed in claim 8 , wherein the resilient element is positioned on a plane, and a normal vector of the plane is parallel to the main axis.

10. The optical element driving mechanism as claimed in claim 1 , wherein the optical element driving mechanism has a rectangular shape, and the driving assembly is disposed at a side of the optical element driving mechanism.

11. The optical element driving mechanism as claimed in claim 10 , wherein the fixed portion comprises:
a base having a rectangular shape; and
a stopping portion extending to the movable portion, and the stopping portion is positioned at a corner of the base or the side of the base.

12. The optical element driving mechanism as claimed in claim 1 , wherein the optical element driving mechanism has a rectangular shape, and the driving assembly is disposed at a corner of the optical element driving mechanism.

13. The optical element driving mechanism as claimed in claim 12 , wherein the fixed portion comprises:
a base having a rectangular shape; and
a stopping portion extending to the movable portion, wherein the stopping portion is positioned at the corner of the base or a side of the base.

14. An optical element driving mechanism, comprising:
a movable portion for connecting to an optical element having a main axis;
a fixed portion, wherein the movable portion is movable relative to the fixed portion;
a driving assembly disposed on the fixed portion or the movable portion, used for driving the movable portion to move relative to the fixed portion;
a support element, wherein the movable portion is connected to the fixed portion through the support element; and
a magnetic permeable element, wherein the fixed portion comprises a base, and the magnetic permeable element is embedded in the base.

15. An optical element driving mechanism, comprising:
a movable portion for connecting to an optical element having a main axis;
a fixed portion, wherein the movable portion is movable relative to the fixed portion;
a driving assembly disposed on the fixed portion or the movable portion, used for driving the movable portion to move relative to the fixed portion;
a support element, wherein the movable portion is connected to the fixed portion through the support element; and
a circuit electrically connected to the driving assembly, wherein the fixed portion comprises a base, and the circuit is embedded in the base.

16. An optical element driving mechanism, comprising:
a movable portion for connecting to an optical element having a main axis;
a fixed portion, wherein the movable portion is movable relative to the fixed portion;
a driving assembly disposed on the fixed portion or the movable portion, used for driving the movable portion to move relative to the fixed portion; and
a support element, wherein the movable portion is connected to the fixed portion through the support element,
wherein the material of the support element comprises ceramic or resin.

17. An optical element driving mechanism, comprising:
a movable portion for connecting to an optical element having a main axis;
a fixed portion, wherein the movable portion is movable relative to the fixed portion;
a driving assembly disposed on the fixed portion or the movable portion, used for driving the movable portion to move relative to the fixed portion; and
a support element, wherein the movable portion is connected to the fixed portion through the support element,
wherein the fixed portion comprises a base, the base comprises a convex portion extending to the movable portion, the support element has a spherical shape, and a minimum distance between the convex portion and the fixed portion along the main axis is less than the diameter of the support element.

18. An optical element driving mechanism, comprising:
a movable portion for connecting to an optical element having a main axis;
a fixed portion, wherein the movable portion is movable relative to the fixed portion, and the fixed portion comprises:
a base having a rectangular shape; and
a stopping portion extending to the movable portion, wherein the stopping portion is positioned at a corner of the base;

a driving assembly disposed on the fixed portion or the movable portion, used for driving the movable portion to move relative to the fixed portion, wherein the driving assembly comprises a first magnetic element and a second magnetic element, wherein a minimum distance between the stopping portion and the movable portion is less than a minimum distance between the first magnetic element and the second magnetic element along the main axis; and
a support element, wherein the movable portion is connected to the fixed portion through the support element.

Assignees

• Tdk Taiwan Corp

Inventors

• Hu Chao-Chang
• Tsai Sung-Mao
• Wu Chia-Che

Classifications

• H04N23/51 Primary

  Housings · CPC title

• G02B7/005 Primary

  Motorised alignment · CPC title

• H04N23/60

  Control of cameras or camera modules · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/55

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