WO2022041389A1

WO2022041389A1 - Optical image stabilization apparatus, camera and portable electronic device

Info

Publication number: WO2022041389A1
Application number: PCT/CN2020/118619
Authority: WO
Inventors: 苏旅昂; 张伯维; 李承峻
Original assignee: 诚瑞光学(深圳)有限公司
Priority date: 2020-08-31
Filing date: 2020-09-29
Publication date: 2022-03-03
Also published as: CN111812911B; CN111812911A

Abstract

Disclosed are an optical image stabilization apparatus, a camera and a portable electronic device. The optical image stabilization apparatus comprises a base (10), a first supporting member (20), a second supporting member (30), a first rotating shaft (40), a second rotating shaft (50), a first suspension assembly (60) and a second suspension assembly (70), wherein the first supporting member (20) is arranged above the base (10); the second supporting member (30) is arranged above the first supporting member (20); the first suspension assembly (60) is connected to the first supporting member (20); the second suspension assembly (70) is connected to the second supporting member (30); the first rotating shaft (40) is arranged between the base (10) and the first supporting member (20); the first supporting member (20) and the base (10) can rotate relatively around the first rotating shaft (40); the second rotating shaft (50) is arranged between the first supporting member (20) and the second supporting member (30); and the second supporting member (30) and the first supporting member (20) can rotate relatively around the second rotating shaft (50). Stabilization compensation accuracy can be improved, such that the image effect is improved.

Description

Optical image stabilization device, camera and portable electronic equipment

technical field

The present application relates to optical image stabilization devices, cameras, and portable electronic devices.

Background technique

Camera devices are widely used in cameras and portable electronic devices such as mobile phones, tablets, and notebooks.

The purpose of Optical Image Stabilization (OIS) devices is to compensate for camera shake, the vibration of the camera device usually caused by the movement of the user's hand, which reduces the quality of the image captured by the image sensor.

technical problem

In the prior art, the OIS device drives the camera module to rotate around two imaginary rotation axes perpendicular to the optical axis of the lens through four actuators, and each two actuators is a group, and the two actuators in each group are located at The two sides of an imaginary rotation axis respectively provide a component force opposite to the tilt direction along the optical axis of the lens. Since the four actuators act on the camera module at the same time, when rotating around an imaginary rotation axis, the brake will also drive The camera module rotates around another imaginary rotation axis, that is to say, the rotations around the two imaginary rotation axes are coupled, which is very unfavorable for accurately compensating the tilt of the camera module.

technical solutions

The purpose of the present application is to provide an optical image stabilization device, a camera and a portable electronic device, which can improve the accuracy of stabilization compensation and obtain high-quality image effects.

The technical solution of this application is as follows:

An optical image stabilization device, comprising a base, a first support, a second support, a first rotation shaft, a second rotation shaft, a first suspension assembly and a second suspension assembly; the first support member is arranged on the Above the base, the second support is arranged above the first support; the first suspension assembly is connected with the first support, and the first suspension assembly can provide the first support along the Restoring force in the direction of the central axis of the optical image stabilization device; the second suspension assembly is connected with the second supporting member, and the second suspension assembly can provide the second supporting member in the direction of the central axis The restoring force of the A rotating shaft is disposed between the first supporting member and the second supporting member, and the second supporting member and the first supporting member can rotate relatively around the second rotating shaft.

A camera includes a camera module and the above-mentioned optical image stabilization device, wherein the camera module is fixedly connected above the second support member.

A portable electronic device comprising the above-mentioned camera.

beneficial effect

The beneficial effects of this application are:

1) By arranging the second support and the second rotation axis arranged under the second support, the second support and the first support can only rotate relative to the second rotation axis. The first support member and the first rotation shaft located between the first support member and the base allow the first support member and the base to rotate relatively only around the first rotation shaft. Because the space between the first support member and the second support member is restricted by the second rotation axis, the second support member can also drive the first support member to rotate around the first rotation axis, so that the second support member has the first rotation axis and The degree of freedom of rotation around the second axis of rotation in both directions, and, due to the constraints of the first axis of rotation and the second axis of rotation, when rotating around one axis of rotation, the second support will not rotate around the other axis of rotation at the same time turn. That is to say, the rotations around the first rotation axis and the rotation around the second rotation axis of the present application are independent and do not affect each other, and can accurately compensate the shaking of the camera module and improve the quality of images captured by the camera module.

2) By arranging the second support for carrying the camera module, the optical image stabilization device of the present application can be combined with any existing camera module in a modular manner without changing the internal structure of the camera module.

Description of drawings

FIG. 1 is a schematic diagram of an exploded structure of an optical image stabilization device according to a specific embodiment of the present application.

FIG. 2 is a schematic diagram of a combined structure of the optical image stabilization device shown in FIG. 1 .

FIG. 3 is a schematic diagram of the combined structure of the optical image stabilization device shown in FIG. 1 with the protective cover removed.

FIG. 4 is a top view of the structure shown in FIG. 3 .

FIG. 5 is a schematic cross-sectional view along A-A in FIG. 4 .

FIG. 6 is a schematic cross-sectional view taken along the line B-B in FIG. 4 .

FIG. 7 is a schematic structural diagram of an SMA actuator according to a specific embodiment of the present application.

FIG. 8 is a schematic structural diagram of a first elastic member according to an embodiment of the present application.

FIG. 9 is a schematic structural diagram of a first support member according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of a second support member according to an embodiment of the present application.

FIG. 11 is a schematic structural diagram of a base according to a specific embodiment of the present application.

FIG. 12 is a schematic structural diagram of a circuit board according to a specific embodiment of the present application.

Embodiments of the present invention

The present application will be further described below with reference to the accompanying drawings and embodiments.

The optical image stabilization device of the present application is mainly used for compensating for camera module shake, and can be applied to cameras and all portable electronic devices including cameras, such as cameras, mobile phones, tablets, computers, and the like.

1-6, the present application discloses an optical image stabilization device, comprising a base 10, a first support member 20, a second support member 30, a first rotation shaft 40, a second rotation shaft 50, and a first suspension assembly 60 and the second suspension assembly 70. The first support member 20 is disposed above the base 10 , the second support member 30 is disposed above the first support member 20 ; the camera module is fixedly connected above the second support member 30 , and the first suspension component 60 is connected to the first support member 20 , The first suspension assembly 60 can provide the restoring force of the first support member 20 along the direction of the central axis O of the optical image stabilization device; the second suspension assembly 70 is connected with the second support member 30, and the second suspension assembly 70 can provide the second support The restoring force of the member 30 along the direction of the central axis O; the first rotating shaft 40 is arranged between the base 10 and the first supporting member 20, and the first supporting member 20 and the base 10 can rotate relative to the first rotating shaft 40; the second rotating shaft 40 The shaft 50 is disposed between the first support member 20 and the second support member 30 , and the second support member 30 and the first support member 20 can rotate relatively around the second rotation shaft 50 . Preferably, the extension direction of the first rotation shaft 40 is perpendicular to the central axis O, the extension direction of the second rotation shaft 50 is perpendicular to the central axis O, and the extension direction of the first rotation shaft 40 and the extension direction of the second rotation shaft 50 are constant. angle. The first rotation axis 40 and the second rotation axis 50 define the rotation of the second support member 30 around the first rotation axis 40 and around the second rotation axis 50 , the first rotation axis 40 and the second rotation axis 50 in the present application The rotations of the cameras are independent and do not affect each other, which can accurately compensate the camera module shake and improve the quality of the images captured by the camera module.

The angle between the extending direction 401 of the first rotating shaft 40 and the extending direction 501 of the second rotating shaft 50 may be any non-zero value. For ease of calculation, preferably, the extending direction 401 of the first rotating shaft 40 and the second rotating shaft The extension direction 501 of the axis 50 is vertical, so that the optical image stabilization device can compensate for the shake from two mutually perpendicular directions perpendicular to the central axis O, that is, decompose the inclination of the shaking into two directions perpendicular to the central axis O. Rotation in mutually perpendicular directions.

Preferably, the optical image stabilization device of the present application includes a first actuator and a second actuator both connected to the second support member 30 , and the first actuator is used to drive the second support member 30 around the first rotation axis 40 is rotated, and the second actuator is used to drive the second support 30 to rotate around the second rotation axis 50 .

The first actuator includes two, located on both sides of the first rotating shaft 40, respectively, the second actuator includes two, located on both sides of the second rotating shaft 50, respectively, two first actuators and two The second actuator is arranged symmetrically with respect to the central axis O. In this specific embodiment, both the first actuator and the second actuator are SMA actuators 80 .

Shape Memory Alloys (SMA for short) is a new type of functional material that integrates temperature sensing and actuation. Because of its very high energy density, it is especially suitable for making small-sized drive devices. Preferably, the present application adopts the SMA actuator 80 to meet the requirement of miniaturization. Each 2 SMA actuators 80 is a group, respectively used to drive the rotation around the first rotation axis 40 and the rotation around the second rotation axis 50, and the distance between the 2 SMA actuators 80 in each group from the central axis O same. When shaking occurs and the camera module deviates from the initial position, the SMA actuator 80 can drive the second support member 30 to return to the original position by rotating around the first rotation axis 40 and/or around the second rotation axis 50 . position, so as to drive the camera module back to its original position to counteract the shake.

Specifically, referring to FIG. 7 , the SMA actuator 80 includes an SMA wire 801 , and two ends of the SMA wire 801 are respectively provided with a first connecting portion 802 and a second connecting portion 803 , and the first connecting portion 802 and the second connecting portion 803 Fixedly connected to one of the base 10 and the second support 30, the middle of the SMA wire 801 is suspended from the other of the base 10 and the second support 30, the whole is V-shaped, the first connecting part 802 and the second The connection part 803 is also used for connection with an external power source. In this specific embodiment, the second support member 30 and the base 10 are both square, grooves 301 are provided on the four corners of the second support member 30, the middle of the SMA wire 801 is suspended in the grooves 301, and the first The connection part 802 and the second connection part 803 are fixed to the outer side wall 101 of the base 10 by fasteners. When electrified, the shape of the SMA wire 801 is contracted by electrification heating to provide a driving force.

Preferably, referring to FIGS. 4-6 , the first rotating shaft 40 is a first cylindrical protrusion, the extending direction of the first cylindrical protrusion is consistent with the extending direction 401 of the first rotating shaft 40 , and the first cylindrical protrusion is provided on the base 10 One of the first support member 20 and the first cylindrical groove matched with the first cylindrical protrusion is provided on the other of the base 10 and the first support member 20. The extension direction and center of the first cylindrical protrusion are Axis O is vertical. The first cylindrical protrusion may be a cylindrical protrusion with a longer length, or may be a plurality of cylindrical protrusions with a shorter length on the same straight line. In this specific embodiment, the number of the first cylindrical protrusions is 2. In other achievable embodiments, the number of the first cylindrical protrusions may also be one, or three or more.

Preferably, referring to FIGS. 4-6 , the second rotating shaft 50 is a second cylindrical protrusion, the extending direction of the second cylindrical protrusion is consistent with the extending direction 501 of the second rotating shaft 50 , and the second cylindrical protrusion is arranged on the first cylindrical protrusion. One of the support member 20 and the second support member 30, the second cylindrical groove matched with the second cylindrical protrusion is provided on the other of the first support member 20 and the second support member 30, and the second cylindrical protrusion The direction of extension is perpendicular to the central axis O. The second cylindrical protrusion may be a cylindrical protrusion with a longer length, or may be a plurality of cylindrical protrusions with a short length on the same straight line. In this specific embodiment, the number of the second cylindrical protrusions is also The number of the second cylindrical protrusions may also be one, or three or more in other achievable embodiments.

4-6 , in this specific embodiment, the first suspension assembly 60 is connected to the first support member 20 and the base 10 , and the second suspension assembly 70 is connected to the second support member 30 and the first support member 20 . Specifically, the first suspension assembly 60 includes two first elastic members 601 , and the two first elastic members 601 are respectively located on both sides of the first rotating shaft 40 . Preferably, the two first elastic members 601 are about the first rotating shaft 40 . Symmetrically, the second suspension assembly 70 includes two second elastic members 701 , and the two second elastic members 701 are located on both sides of the second rotation axis 50 respectively. Preferably, the two second elastic members 701 are symmetrical about the second rotation axis 50 .

In order to reduce the overall height and volume of the device, preferably, the first elastic member 601 and the second elastic member 701 are both sheet-shaped. Referring to FIG. 8 , in this specific embodiment, the first elastic part 601 and the second elastic part 701 are the same, including the first elastic part 6011 and the second elastic part 6012 , and the connection between the first elastic part 6011 and the second elastic part 6012 There is a first mounting portion 6013, the end of the first elastic portion 6011 away from the second elastic portion 6012 is provided with a second mounting portion 6015, and the end of the second elastic portion 6012 away from the first elastic portion 6011 is provided with a second mounting portion 6015. Three installation parts 6014, the first installation part 6013 is used for fixing to a connecting piece, the second installation part 6015 and the third installation part 6014 are used for fixing another connecting piece, after installation, the whole is V-shaped, this design can provide The restoring force in the direction of the central axis O, while increasing the rigidity of movement in other directions. Preferably, the first elastic portion 6011 and the second elastic portion 6012 are perpendicular to each other, and the first elastic member 601 includes two, which are respectively disposed on both sides of the first rotating shaft 40 and have the same distance from the first rotating shaft 40. The two elastic members 701 include two, which are respectively disposed on both sides of the second rotating shaft 50 and have the same distance from the second rotating shaft 50 .

In order to further reduce the overall height and volume of the device, the first elastic member 601 and the second elastic member 701 can be embedded in the accommodating groove. In this specific embodiment, referring to FIGS. 9 and 11 , the first supporting member 20 has The side facing away from the base 10 is provided with a second accommodating groove 202 for accommodating the second elastic member 701 , and the side of the base 10 close to the first support member 20 is provided with a first accommodating groove 102 for accommodating the first elastic member 601 .

In another preferred embodiment, the first suspension assembly 60 can also be connected to the first support member 20 and the base 10 , and the second suspension assembly 70 can be connected to the second support member 30 and the base 10 .

Referring to FIG. 10 , in this specific embodiment, the second support member 30 includes a bottom plate 302 and a side plate 303 that is bent and extended along the edge of the bottom plate 302 away from the base 10 . The bottom plate 302 and the side plate 303 enclose an accommodation cavity for accommodating the camera module . Preferably, the base plate 302 is further provided with a positioning structure for positioning the camera module so that the central axis O of the optical image stabilization device coincides with the optical axis of the lens system in the camera module.

In this specific embodiment, referring to FIG. 1 and FIG. 2 , the optical image stabilization device further includes a protective case 100 for protecting the camera module and the driving components, the protective case 100 is fixedly connected with the base 10 , and the protective case 100 and the base 10 form a cavity , the first support member 20, the second support member 30, the first rotation shaft 40, the second rotation shaft 50, the first suspension assembly 60, the second suspension assembly 70 and the four SMA actuators 80 are all located in the cavity . The four corners of the base 10 are further provided with side walls 101 extending toward the direction of the second support member 30 , and the side walls 101 are connected with the protective shell 100 in a snap-fit connection.

In this specific embodiment, referring to FIGS. 1-3 , the optical image stabilization device further includes a circuit board 90 , and the circuit board 90 is attached to the side of the base 10 away from the second support member 30 . The circuit board 90 has circuits therein for electrically connecting the electronic components in the optical image stabilization device with external power sources and/or electronic components.

Referring to FIG. 12 , in this specific embodiment, the circuit board 90 includes a main body 901 , a protruding end 902 extending outward from the edge of the main body 901 and a bending portion 903 extending from the edge of the main body 901 toward the base 10 . The portion 903 is located between the protective case 100 and the base 10 , and the protruding end 902 is located outside the protective case 100 . The size of the main body 901 is the same as that of the base 10, a plurality of contacts 9021 are provided on the extension end 902 for electrical connection with an external power supply and/or electronic components, and the first connection portion 802 and the second connection of the four SMA wires 801 The part 803 is fixed on the side surface of the base 10 and is electrically connected to the circuit board 90 .

Preferably, the circuit board 90 is a flexible circuit board.

The optical image stabilization device of the present application further includes a shake sensor for capturing the signal that the second support 30 shakes and deviates from the central axis O, and the shake sensor may be a Hall sensor or a gyroscope sensor. When shaking occurs, the shaking sensor detects the shaking angle and amplitude, and the control system drives the actuator to compensate.

A camera includes a camera module and the above-mentioned optical image stabilization device. The camera module is fixedly connected above the second support member 30 . In this specific embodiment, the camera module includes an image sensor, a lens system for focusing an image on the image sensor, and a translational optical image stabilization device for moving the lens system along its optical axis. Of course, more functional modules can also be installed inside the camera module, or a certain functional module can be reduced.

A portable electronic device, such as a camera, a mobile phone, a tablet, a computer, etc., comprising the above-mentioned camera.

The above are only the embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present application, but these belong to the present application. scope of protection.

Claims

An optical image stabilization device, characterized by comprising a base, a first support, a second support, a first rotation axis, a second rotation axis, a first suspension assembly and a second suspension assembly;

The first support member is arranged above the base, and the second support member is arranged above the first support member;

the first suspension assembly is connected with the first support member, and the first suspension assembly can provide the restoring force of the first support member along the direction of the central axis of the optical image stabilization device;

the second suspension assembly is connected with the second support member, and the second suspension assembly can provide the restoring force of the second support member along the direction of the central axis;

The first rotating shaft is disposed between the base and the first support member, and the first support member and the base can rotate relatively around the first rotating shaft;

The second rotation shaft is disposed between the first support member and the second support member, and the second support member and the first support member can rotate relatively around the second rotation shaft.
The optical image stabilization device according to claim 1, wherein the extension direction of the first rotation axis is perpendicular to the central axis, and the extension direction of the second rotation axis is perpendicular to the central axis.
The optical image stabilization device according to claim 2, wherein the extension direction of the first rotation axis is perpendicular to the extension direction of the second rotation axis.
The optical image stabilization device according to claim 1, further comprising a first actuator and a second actuator both connected to the second support, the first actuator being used for driving The second support member rotates around the first rotation axis, and the second actuator is used to drive the second support member to rotate around the second rotation axis.
The optical image stabilization device according to claim 4, wherein the number of the first actuators is two, and the two first actuators are located on both sides of the first rotating shaft respectively, so The number of the second actuators is two, the two second actuators are respectively located on both sides of the second rotating shaft, the two first actuators and the two second actuators Symmetrical arrangement with respect to the central axis.
The optical image stabilization device according to claim 5, wherein the actuator is an SMA actuator, and the SMA actuator provides a driving force through contraction deformation.
The optical image stabilization device according to claim 6, wherein the SMA actuator comprises an SMA wire, and two ends of the SMA wire are respectively provided with a first connection part and a second connection part, and the first connection part is Both the connecting portion and the second connecting portion are fixedly connected to one of the base and the second support, and the middle of the SMA wire is suspended from the other of the base and the second support. one.
The optical image stabilization device according to claim 1, wherein the first rotation axis is a first cylindrical protrusion, and one of the base and the first support member is provided with the first a cylindrical protrusion, the other of the base and the first support member is provided with a first cylindrical groove matched with the first cylindrical protrusion;

The second rotating shaft is a second cylindrical protrusion, one of the first support member and the second support member is provided with the second cylindrical protrusion, and the first support member and the first support member are provided with the second cylindrical protrusion. The other of the two supporting members is provided with a second cylindrical groove matched with the second cylindrical protrusion.
The optical image stabilization device according to claim 1, wherein the first suspension assembly is connected to the first support and the base, and the second suspension assembly is connected to the second support and the base. the first support.
The optical image stabilization device according to claim 9, wherein the first suspension assembly comprises two first elastic members, and the two first elastic members are respectively located on both sides of the first rotation axis;

The second suspension assembly includes two second elastic members, and the two second elastic members are respectively located on both sides of the second rotating shaft.
The optical image stabilization device according to claim 10, wherein the first elastic member and the second elastic member are both sheet-shaped.
The optical image stabilization device according to claim 11, wherein the first elastic member and the second elastic member are embedded in the accommodating groove.
The optical image stabilization device according to claim 1, wherein the first suspension assembly is connected to the first support and the base, and the second suspension assembly is connected to the second support and the base. the base.
The optical image stabilization device according to claim 1, wherein the second support member comprises a bottom plate and a side plate bent and extended along the edge of the bottom plate in a direction away from the base, the bottom plate and the bottom plate The side plate encloses an accommodating cavity for accommodating the camera module.
The optical image stabilization device according to claim 1, further comprising a protective shell, the protective shell is fixedly connected with the base, the protective shell and the base form a cavity, and the first support The member, the second support member, the first rotation shaft, the second rotation shaft, the first suspension assembly and the second suspension assembly are all located in the cavity.
The optical image stabilization device according to claim 1, further comprising a circuit board attached to a side of the base away from the second support member.
The optical image stabilization device according to claim 1, further comprising a shake sensor for capturing a signal that the second support member shakes and deviates from the central axis.
The optical image stabilization device according to claim 17, wherein the shake sensor is a Hall sensor or a gyro sensor.
A camera, characterized by comprising a camera module and the optical image stabilization device according to any one of claims 1-18, wherein the camera module is fixedly connected above the second support.
20. The camera of claim 19, wherein the camera module includes an image sensor, a lens system for focusing an image on the image sensor, and a translational lens system for moving the lens system along its optical axis Optical image stabilization device.
A portable electronic device, characterized by comprising the camera according to any one of claims 19 and 20.