Dual lens driving apparatus and electronic device

Patent metadata

Field	Value
Publication number	US-10466435-B2
Application number	US-201715585403-A
Country	US
Kind code	B2
Filing date	May 3, 2017
Priority date	Feb 9, 2017
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A dual lens driving apparatus includes a holder, a metal yoke, a carrier, a coil, a first magnet, a first elastic element and a second elastic element. The metal yoke is corresponding to the holder and includes a front end which includes a plate surface and a plurality of step portions, and a level difference is between each of the step portions and the plate surface. The carrier is movably disposed in the metal yoke. The coil is disposed around the carrier. The first magnet is disposed in the metal yoke. The first elastic element is assembled on a side of the carrier facing the front end of the metal yoke. The second elastic element is assembled on another side of the carrier facing the holder.

First claim

What is claimed is:

1. A dual lens driving apparatus, comprising:
a holder comprising at least one holder opening;
a metal yoke corresponding to the holder, wherein the metal yoke comprises a front end, and the front end comprises:
a plate surface comprising at least one yoke opening, wherein the yoke opening is corresponding to the holder opening; and
a plurality of step portions, wherein a level difference is between each of the step portions and the plate surface;
a carrier movably disposed in the metal yoke, wherein the carrier comprises a first receiving space and a second receiving space for respectively receiving a first lens assembly and a second lens assembly, a central axis of the first receiving space is parallel to a central axis of the second receiving space, and a moving direction of the carrier is parallel to the central axis of the first receiving space and the central axis of the second receiving space;
a coil disposed around the carrier;
a first magnet disposed in the metal yoke, wherein the first magnet is corresponding to the step portions and the coil;
a first elastic element assembled on a side of the carrier facing the front end of the metal yoke, wherein the first elastic element is disposed between the step portions and the first magnet;
a second elastic element assembled on another side of the carrier facing the holder, wherein the second elastic element comprises at least two elastic members, and the elastic members are electrically separated with each other and are arranged on a same plane; and
wherein a maximum length of the metal yoke parallel to a vertical distance between the central axis of the first receiving space and the central axis of the second receiving space is L, a maximum width of the metal yoke orthogonal to the vertical distance between the central axis of the first receiving space and the central axis of the second receiving space is W, the level difference between each of the step portions and the plate surface is d, and the following condition is satisfied:
15< L/d−W/d< 40.

2. The dual lens driving apparatus of claim 1 , wherein a number of the holder openings is two, and the two holder openings are respectively corresponding to the first receiving space and the second receiving space.

3. The dual lens driving apparatus of claim 2 , wherein the holder further comprises two annular grooves, and each of the annular grooves surrounds one of the holder openings.

4. The dual lens driving apparatus of claim 2 , wherein a number of the step portions is four, the step portions are formed on four corners of the front end, the metal yoke further comprises a side wall, the side wall is integrally connected with the front end, and the side wall is composed of a plurality of side surfaces with different lengths.

5. The dual lens driving apparatus of claim 4 , wherein the maximum length of the metal yoke parallel to a vertical distance between the central axis of the first receiving space and the central axis of the second receiving space is L, the maximum width of the metal yoke orthogonal to the vertical distance between the central axis of the first receiving space and the central axis of the second receiving space is W, and the following condition is satisfied:
1.5< L/W< 4.0.

6. The dual lens driving apparatus of claim 3 , wherein the carrier further comprises:
a first extending structure corresponding to the first receiving space, wherein the first extending structure extends from the first receiving space to the holder; and
a second extending structure corresponding to the second receiving space, wherein the second extending structure extends from the second receiving space to the holder.

7. The dual lens driving apparatus of claim 6 , wherein each of the first extending structure and the second extending structure is corresponding to one of the annular grooves.

8. The dual lens driving apparatus of claim 1 , wherein a separated space is between the coil and the carrier, whereby a distance between the coil and the first magnet is adjustable.

9. The dual lens driving apparatus of claim 8 , wherein the metal yoke further comprises:
at least one elongated portion disposed at the front end closing to the yoke opening, wherein the elongated portion is parallel to the central axis of the first receiving space and the central axis of the second receiving space and extends toward the holder opening, and the elongated portion is corresponding to the first magnet.

10. The dual lens driving apparatus of claim 8 , wherein the metal yoke further comprises:
at least one elongated portion disposed at the front end closing to the yoke opening, wherein the elongated portion is parallel to the central axis of the first receiving space and the central axis of the second receiving space and extends toward the holder opening, and the elongated portion extends into the separated space.

11. The dual lens driving apparatus of claim 8 , wherein a width of the separated space is S, and the following condition is satisfied:
0.08 mm< S< 1.6 mm.

12. The dual lens driving apparatus of claim 8 , wherein the separated space is corresponding to a side of the coil facing the holder.

13. The dual lens driving apparatus of claim 2 , further comprising:
a second magnet disposed on the side of the carrier facing the holder; and
a sensor element corresponding to the second magnet.

14. An electronic device, comprising:
the dual lens driving apparatus of claim 1 ;
the first lens assembly disposed in the first receiving space;
the second lens assembly disposed in the second receiving space; and
two image sensors respectively disposed on an image surface of the first lens assembly and an image surface of the second lens assembly.

15. The electronic device of claim 14 , wherein one of the image sensors is for providing a color image, and the other of the image sensors is for providing a monochrome image.

Assignees

• Largan Digital Co Ltd

Inventors

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

Classifications

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · 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

• G02B7/021

  for more than one lens · CPC title

• G02B27/017

  Head mounted · CPC title

• H04M1/0264

  for a camera module assembly · CPC title