Dual-lens camera system

Patent metadata

Field	Value
Publication number	US-10502974-B2
Application number	US-201816235085-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Apr 28, 2016
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A dual-lens camera system is provided, including a first lens driving module and a second lens driving module each including a lens holder for receiving a lens, at least one magnetic element, and a driving board. The driving board has at least one driving coil for acting with the magnetic element to generate an electromagnetic force to move the lens holder along a direction that is perpendicular to the optical axis of the lens. On two adjacent sides parallel to each other of the first and second lens driving modules, the magnetic elements are arranged in different configurations.

First claim

What is claimed is:

1. A dual-lens camera system, comprising a first lens driving module and a second lens driving module, the first and second lens driving modules being arranged in a long-axis direction, wherein
the first lens driving module comprising:
a first lens holder configured to receive a first lens;
at least one first magnetic element; and
at least one first driving coil configured to act with the first magnetic element to generate an electromagnetic force to move the first lens holder and the first lens along a first direction; and

the second lens driving module comprising:
a second lens holder configured to receive a second lens;
at least one second magnetic element; and
at least one second driving coil configured to act with the second magnetic element to generate an electromagnetic force to move the second lens holder and the second lens along the first direction;

wherein a first side of the first lens driving module and a second side of the second lens driving module are parallel to and adjacent to each other, and the at least one second magnetic element is partially disposed on the second side, the first magnetic element disposed on a third side different from the first side in the first lens driving module having strip structure extending along the long-axis direction, and the first magnetic element is not disposed on the first side.

2. The dual-lens camera system as claimed in claim 1 , wherein the first lens driving module further comprises a first housing, the second lens driving module further comprises a second housing, and parts of the first and second housings are disposed between the first and second magnetic elements.

3. The dual-lens camera system as claimed in claim 1 , wherein the second lens driving module further comprising:
a frame, wherein the second lens holder is movably connected to the frame; and
a base, wherein the frame is movably connected to the base, and the second magnetic element is disposed on the frame.

4. The dual-lens camera system as claimed in claim 3 , wherein the second lens driving module further comprises an elastic element elastically connecting the frame and the second lens holder, and the elastic element and the frame are partially overlapped when viewed along a direction perpendicular to an optical axis of the second lens.

5. The dual-lens camera system as claimed in claim 4 , wherein the second lens driving module further comprises a plurality of second magnetic elements disposed around the second lens holder.

6. The dual-lens camera system as claimed in claim 5 , wherein the second lens driving module has a rectangular shape and the second magnetic elements are respectively disposed at corners of the second lens driving module, when viewed along a direction of the optical axis of the second lens.

7. The dual-lens camera system as claimed in claim 6 , wherein each of the second magnetic elements disposed at the corners of the second lens driving module have a triangular structure.

8. The dual-lens camera system as claimed in claim 1 , wherein the first magnetic element disposed on a fourth side opposite to the third side in the first lens driving module having strip structure extending along the long-axis direction.

9. The dual-lens camera system as claimed in claim 1 , wherein the second magnetic element disposed on the second side having strip structure extending along a direction different from the long-axis direction.

10. The dual-lens camera system as claimed in claim 9 , wherein a side opposite to the first side in the first lens driving module is provided with the first magnetic element, and a weight balancer is disposed on the first side for maintaining the weight balance of the first lens driving module.

11. The dual-lens camera system as claimed in claim 1 , wherein the first lens driving module further comprises a magnet disposed on a second side opposite the first side, and the width of the magnet is greater than the width of the magnetic element of the first lens driving module.

12. The dual-lens camera system as claimed in claim 1 , wherein the magnetic pole direction of the magnetic element of the first lens driving module is parallel to the optical axis of the lens.

13. The dual-lens camera system as claimed in claim 1 , further comprising a position sensing assembly disposed on the first side or the second side.

14. The dual-lens camera system as claimed in claim 13 , wherein the position sensing assembly comprises a reference magnetic element and a magnetic field sensing element.

15. The dual-lens camera system as claimed in claim 1 , wherein the first lens driving module further comprises a magnet and a magnetic field sensing element, the magnet and the magnetic field sensing element are disposed on a first side of the first lens driving module adjacent to the second lens driving module, and the magnetic field sensing element learns the position offset amount of the magnet by detecting the magnetic field variation of the magnet, and the magnet and the magnetic field sensing element do not overlap when viewed along the optical axis.

16. The dual-lens camera system as claimed in claim 15 , wherein the first lens driving module further comprises two magnetic field sensing elements, the magnet and the magnetic field sensing elements are disposed on the first side, and the magnet is located between the magnetic field sensing elements.

17. The dual-lens camera system as claimed in claim 1 , wherein the first lens driving module further comprises a shielding member having a portion disposed between the first and second magnetic elements for reducing the magnetic interference between the first and second lens driving modules.

18. The dual-lens camera system as claimed in claim 17 , wherein the shielding member forms at least one recess corresponding to a top surface of the first lens holder of the first lens driving module for preventing the first lens holder from impacting the shielding member.

19. The dual-lens camera system as claimed in claim 1 , wherein the magnetic elements comprise at least one multipole magnet.

20. The dual-lens camera system as claimed in claim 19 , wherein the first magnetic element or the second magnetic element is the multipole magnet.

Assignees

• Tdk Taiwan Corp

Inventors

• Hu Chao-Chang
• Song Bing-Ru

Classifications

• H04N23/68

  for stable pick-up of the scene, e.g. compensating for camera body vibrations · CPC title

• H04N23/687

  by shifting the lens or sensor position · CPC title

• G03B2205/0015

  by displacing one or more optical elements normal to the optical axis · CPC title

• G03B13/34 Primary

  Power focusing · CPC title

• G03B5/02

  Lateral adjustment of lens · CPC title