Dual lens driving apparatus and electronic device

Patent metadata

Field	Value
Publication number	US-10495945-B2
Application number	US-201715598471-A
Country	US
Kind code	B2
Filing date	May 18, 2017
Priority date	Feb 10, 2017
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A dual lens driving apparatus includes a holder, a metal yoke, a carrier, a first coil, at least one magnet and at least one first sensing component. The carrier is movably disposed in the metal yoke, wherein the carrier includes a first receiving space and a second receiving space, the first receiving space and the second receiving space are for receiving a first lens assembly and a second lens assembly respectively, a central axis of the first receiving space and a central axis of the second receiving space are parallel, the carrier can be moved at least along a first direction, and the first direction is parallel to the two central axes. The magnet is movably disposed in the metal yoke, wherein the magnet can be moved at least along a second direction, and the second direction is vertical to the two central axes.

First claim

What is claimed is:

1. A dual lens driving apparatus, comprising:
a holder comprising at least one holder opening;
a metal yoke disposed correspondingly to the holder, wherein the metal yoke comprises a front end portion, at least one metal yoke opening is located on the front end portion, and the metal yoke opening is disposed correspondingly to the holder opening;
a carrier movably disposed in the metal yoke, wherein the carrier comprises a first receiving space and a second receiving space, the first receiving space and the second receiving space are for receiving a first lens assembly and a second lens assembly respectively, a central axis of the first receiving space and a central axis of the second receiving space are parallel, the carrier can be moved at least along a first direction, and the first direction is parallel to the two central axes;
a first coil surrounding and disposed on the carrier;
at least one magnet movably disposed in the metal yoke, wherein the magnet can be moved at least along a second direction, and the second direction is vertical to the two central axes; and
at least one first sensing component adjacent to and facing the magnet, wherein the first sensing component is for sensing a displacement along the second direction of the magnet;
wherein a maximum length of the carrier which is parallel to a vertical connection between the two central axes is CL, a minimum length of the front end portion which is vertical to the vertical connection between the two central axes is YS, and the following condition is satisfied:
1.18< CL/YS< 4.0.

2. The dual lens driving apparatus of claim 1 , further comprising:
at least three metal suspension wires, which are all disposed in the metal yoke and parallel to the two central axes.

3. The dual lens driving apparatus of claim 2 , further comprising:
a frame, wherein the carrier is disposed in the frame, and the frame accommodates and is connected to the magnet; and
a spring element connected to the frame, wherein the spring element comprises at least three wire-connecting portions, the wire-connecting portions are respectively corresponding to the metal suspension wires, and each of the wire-connecting portions is connected to one end of one of the metal suspension wires which is corresponding thereto.

4. The dual lens driving apparatus of claim 3 , wherein the spring element comprises:
at least one first spring plate, which is assembled on one side of the carrier close to the front end portion of the metal yoke; and
at least one second spring plate, which is assembled on one side of the carrier far from the front end portion.

5. The dual lens driving apparatus of claim 4 , wherein only the first spring plate of the first spring plate and the second spring plate comprises the wire-connecting portions, and the first spring plate is assembled with the frame.

6. The dual lens driving apparatus of claim 5 , wherein each of the wire-connecting portions comprises a notch for the one of the metal suspension wires which is corresponding thereto be shifted into the notch.

7. The dual lens driving apparatus of claim 1 , wherein the magnet comprises at least one parallel surface and at least one vertical surface, the parallel surface is parallel to the two central axes, and the vertical surface is vertical to the two central axes.

8. The dual lens driving apparatus of claim 7 , further comprising:
at least one second coil disposed between the magnet and the holder, wherein the second coil is for driving the carrier and the magnet to move along the second direction.

9. The dual lens driving apparatus of claim 8 , wherein an air space distance parallel to the two central axes between the second coil and the vertical surface of the magnet is t, and the following condition is satisfied:
0.02 mm< t< 0.70 mm.

10. The dual lens driving apparatus of claim 9 , wherein the air space distance parallel to the two central axes between the second coil and the vertical surface of the magnet is t, and the following condition is satisfied:
0.05 mm< t< 0.40 mm.

11. The dual lens driving apparatus of claim 1 , wherein the maximum length of the carrier which is parallel to the vertical connection between the two central axes is CL, a length of the carrier which is vertical to the vertical connection between the two central axes and passing through the central axis of the first receiving space is CS 1 , a length of the carrier which is vertical to the vertical connection between the two central axes and passing through the central axis of the second receiving space is CS 2 , and the following conditions are satisfied:
1.45< CL/CS 1<4.5; and
1.45< CL/CS 2<4.5.

12. The dual lens driving apparatus of claim 3 , wherein a number of the holder opening is two, the two holder openings are respectively corresponding to the first receiving space and the second receiving space, a maximum length of the holder which is parallel to the vertical connection between the two central axes is HL, the minimum length of the front end portion which is vertical to the vertical connection between the two central axes is YS, and the following condition is satisfied:
1.18< HL/YS< 4.0.

13. The dual lens driving apparatus of claim 3 , wherein a volume proportion of each of the metal suspension wires having a cross-sectional plane vertical to the two central axes being square or rectangular is above 95%.

14. The dual lens driving apparatus of claim 3 , wherein the holder comprises at least three metal connecting portions without being in contact with each other, the metal connecting portions are respectively corresponding to the metal suspension wires, and each of the metal connecting portions is connected to the other end of one of the metal suspension wires which is corresponding thereto.

15. The dual lens driving apparatus of claim 14 , wherein the metal connecting portions are disposed on the holder by an insert molding method.

16. The dual lens driving apparatus of claim 14 , wherein each of the metal connecting portions comprises a notch for the one of the metal suspension wires which is corresponding thereto be shifted into the notch.

17. The dual lens driving apparatus of claim 2 , wherein the carrier can be moved along at least three directions, which are the first direction, the second direction and a third direction, the first direction is orthogonal to both the second direction and the third direction, a number of the first sensing component is at least two, and the first sensing components are Hall effect elements.

18. The dual lens driving apparatus of claim 3 , wherein the magnet is cuboid.

19. The dual lens driving apparatus of claim 18 , wherein a number of the magnet is at least two, at least one of the magnets is a first cuboid magnet, at least another one of the magnets is a second cuboid magnet, the first cuboid magnet and the second cuboid magnet are alternatively arranged to surround the carrier, and a length along the carrier of the first cuboid magnet is greater than a length along the carrier of the second cuboid magnet.

20. An electronic device, comprising:
the dual lens driving apparatus of claim 1 ;
the first lens assembly, wherein the dual lens driving apparatus is for driving the first lens assembly;
the second lens assembly, wherein the dual lens driving apparatus is for driving the second lens assembly, and an optical axis of the first lens assembly and an optical axis of the second lens assembly are parallel; and
two image sensors, wherein the

Assignees

• Largan Digital Co Ltd

Inventors

• Tseng Te-Sheng
• Hsu Wen-Hung
• Kang Yung-Chun

Classifications

• G03B2205/0069

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

• H04N23/55

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

• G02B7/022

  lens and mount having complementary engagement means, e.g. screw/thread · CPC title

• H04N23/45

  for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images · CPC title

• G02B7/08

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