CN111443498A

CN111443498A - Lens module and electronic equipment

Info

Publication number: CN111443498A
Application number: CN202010296503.3A
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-24

Abstract

The embodiment of the application provides a lens module and electronic equipment, the lens module includes base plate, image sensor, memory alloy actuator and lens group, image sensor sets up in the base plate, the memory alloy actuator sets up in the base plate, lens group includes liquid optical lens, the lens group sets up in the memory alloy actuator and lies in the one side of keeping away from image sensor, the memory alloy actuator is used for driving the lens group and carries out the shake compensation. It drives the deformation of supporter along the optical axis direction of perpendicular to camera lens module through the memory alloy body for the lens group realizes the anti-shake function of camera lens module along with the supporter displacement, simultaneously through setting up liquid optical lens, realize that camera lens module optical axis direction is ascending the macro zoom, because liquid optical lens need not have the long stroke at the in-process that realizes zooming, and need not set up extra actuator, consequently whole camera lens module is realizing under the prerequisite that optics anti-shake and macro zoom, also can not additionally increase volume or weight.

Description

Lens module and electronic equipment

Technical Field

The application relates to the field of electronic equipment, in particular to a lens module and electronic equipment.

Background

At present, electronic equipment such as smart mobile phones are mostly provided with one or more cameras for image shooting, but current camera size is bigger and bigger, and the camera lens is also bigger and bigger, and the user also requires to be more and more near to the distance that the microspur was shot simultaneously, and this micro actuator in the camera of just requiring possesses bigger thrust, and bigger stroke just can drive more and more heavy camera lens, accomplishes nearer microspur (the microspur is nearer, required stroke is bigger). This increases the weight and volume of the electronic apparatus, which is disadvantageous for the weight reduction of the electronic apparatus.

Disclosure of Invention

An object of the present application is to provide a lens module and an electronic device, so as to improve the above problems, and to achieve a smaller macro without significantly increasing the size of the lens module.

In a first aspect, an embodiment of the present application provides a lens module, which includes a substrate, an image sensor disposed on the substrate, a memory alloy actuator disposed on the substrate, and a lens group including a liquid optical lens, the lens group being disposed on the memory alloy actuator and located on a side of the memory alloy actuator away from the image sensor, the memory alloy actuator being configured to drive the lens group to move in a direction perpendicular to an optical axis for shake compensation.

In a second aspect, an embodiment of the present application provides an electronic device, which includes a housing and the lens module described above, where the lens module is mounted on the housing.

The application provides a camera lens module and electronic equipment, drive the deformation of supporter along the optical axis direction of perpendicular to camera lens module through the memory alloy body, make the lens group realize the anti-shake function of camera lens module along with the supporter displacement, simultaneously through setting up liquid optical lens, realize that camera lens module optical axis direction is ascending to zoom a little, because liquid optical lens need not have the long stroke at the in-process that realizes zooming, and need not set up extra actuator, consequently whole camera lens module is realizing under the prerequisite that optics anti-shake and little apart from zoom, also can not additionally increase volume or weight.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lens module according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a memory alloy actuator according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic structural diagram of a liquid optical lens provided in an embodiment of the present application;

fig. 5 is a usage state diagram of a liquid optical lens provided by the embodiment of the present application;

FIG. 6 is a diagram of another usage state of a liquid optical lens provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

At present, there are two main ways of achieving macro zooming with large stroke, one is to provide an actuator with large stroke, such as a voice coil motor, but this way needs a large stroke of the actuator itself to achieve macro zooming with large stroke, which results in that the actuator would be large in volume and not suitable for being applied in electronic devices. Another way is to provide a memory alloy (SMA) to move in the optical axis direction of the lens to achieve zooming, which has the problems that the effective deformation range of the memory alloy is limited, the memory alloy cannot deform along the optical axis direction of the lens with a large stroke, the effective zooming range is limited (the part of the SMA material which can be effectively utilized is within 3%), and if the stroke of more than 600um is achieved, the height of the final micro-actuator is too large, and the micro-actuator is not suitable for being applied to electronic equipment.

Therefore, the inventor proposes the lens module and the electronic device in the embodiment of the application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the present embodiment provides a lens module 100, which includes a substrate 110, an image sensor 120, a memory alloy actuator 200 and a lens assembly 300, wherein the substrate 110 is used for mounting the image sensor 120, the memory alloy actuator 200 is used for driving the lens assembly 300 to move in a direction perpendicular to an optical axis of the lens module 100 to implement a shake compensation, and the lens assembly 300 is mounted on the memory alloy actuator 200.

Various electronic circuits are disposed on the substrate 110 for supplying power, signal control, and the like to the memory alloy actuator 200, the image sensor 120, and the lens assembly 300. The substrate 110 may be a Printed Circuit Board (PCB), a Flexible Printed Circuit (FPC), or the like. The image sensor 120 may utilize a photoelectric conversion function of an optoelectronic device. The light image on the light sensing surface is converted into an electric signal in corresponding proportion to the light image. The image sensor 120 may be a CCD sensor, a CMOS sensor, or the like. The image sensor 120 is mounted on one side surface of the substrate 110 and electrically connected to a circuit on the substrate 110. In the present application, the optical axis direction of the lens module 100 refers to the optical axis direction of the image sensor 120.

Referring to fig. 2 and 3, the memory alloy actuator 200 is used to mount the lens assembly 300 and drive the lens assembly 300 to move along a direction perpendicular to the optical axis of the lens module 100 to implement the shake compensation. The memory alloy actuator 200 includes a support 210, a movable plate 220, and a memory alloy 230, wherein the support 210 is fixed to the substrate 110, the support 210 forms a main body of the memory alloy actuator 200, and the support 210 may be made of plastic, alloy, or other materials.

Referring to fig. 3, the support 210 has a light-transmitting portion 211 through which light passes, the light-transmitting portion 211 is located on an optical axis of the image sensor 120, and the light-transmitting portion 211 allows external light to enter the image sensor 120 and be captured by the image sensor 120. In some embodiments, the light-transmitting portion 211 may be a light-transmitting hole, the light-transmitting hole may be disposed in the middle of the supporting body 210 and penetrates through the supporting body 210 along the optical axis direction of the lens module 100, and the cross-sectional area of the light-transmitting hole may match with the light-incident area of the image sensor 120 or be slightly larger than the light-incident area of the image sensor 120, so as to ensure that the image sensor 120 has a larger light-incident effect. The light transmissive holes may be, for example, circular holes and substantially conform to the shape of the image sensor 120.

In some other embodiments, the light-transmitting portion 211 may also be a transparent plate, which may be embedded in the supporting body 210 and allows light to enter the image sensor 120 through the supporting body 210 along the optical axis direction of the lens module 100. The transparent plate may be made of glass, transparent plastic, or the like, for example.

Referring to fig. 2 and fig. 3 again, the movable plate 220 is movably disposed on the supporting body 210, and the memory alloy 230 is connected between the supporting body 210 and the movable plate 220 and used for driving the movable plate 220 to move along a direction perpendicular to the optical axis of the image sensor 120 so as to drive the lens set 300 to perform shake compensation. Specifically, the Memory alloy 230 (SMA) is an alloy material that can completely eliminate its deformation at a lower temperature after being heated and warmed, and recover its original Shape before being deformed, i.e., an alloy having a "Memory" effect. When the memory alloy 230 is heated, it expands and contracts according to a predetermined track, so as to drive the movable plate 220 to slide relative to the support 210, thereby driving the lens assembly 300 disposed on the movable plate 220 to move.

As an embodiment, with continued reference to fig. 2, the movable plate 220 includes a body 221 and at least two connecting arms 222, and the connecting arms 222 are connected to an outer edge of the body 221 and are used for connecting with the memory alloy 230. The number of the connection arms 222 may be two, three, or more than three, and at least two connection arms 222 are spaced apart and connected to the outer edge of the body 221. The connecting arms 222 may be made of plastic having a certain elasticity and configured to be disposed in a coplanar manner with the plane of the body 221.

In this embodiment, the at least two connection arms 222 include a first connection arm 2221 and a second connection arm 2222, and the first connection arm 2221 and the second connection arm 2222 are axisymmetrical along the optical axis of the image sensor 120. So as to disperse the pulling force of the movable plate 220 when receiving the driving force of the memory alloy 230, and prevent the local stress from being too large. Specifically, the movable plate 220 has a substantially rectangular shape, the through hole 223 is disposed at the middle portion of the movable plate 220, and the first connecting arm 2221 and the second connecting arm 2222 are located at diagonal positions of the movable plate 220, so that the memory alloy 230 can be arranged conveniently.

Referring to FIG. 2, the memory alloy 230 is disposed at the outer edge of the supporting body 210. The memory alloy 230 may be configured in a wire shape, for example, configured in the form of an alloy wire, the memory alloy 230 may be disposed around the movable plate 220, and one end of the memory alloy 230 is connected to the support 210 and the other end is connected to the connection arm 222, and the movable plate 220 moves relative to the support 210 when the memory alloy 230 contracts or expands. In one embodiment, the memory alloy 230 includes at least two wires, each having one end connected to one of the connection arms 222 and the other end connected to the support 210, the at least two wires being disposed in a first direction and a second direction, respectively, the first direction and the second direction being different directions. The alloy wires respectively disposed in the first direction and the second direction may drive the movable plate 220 to move along two different directions, thereby realizing movement along a plane perpendicular to the optical axis, and driving the lens assembly 300 to perform displacement compensation. Wherein the first direction and the second direction may be two directions perpendicular to each other.

The number of the connecting arms 222 and the number of the alloy wires may be adjusted according to actual needs.

In this embodiment, the at least two connecting arms 222 include a first connecting arm 2221 and a second connecting arm 2222, the memory alloy 230 includes a first alloy wire 221, a second alloy wire 222, a third alloy wire 223 and a fourth alloy wire 224, the first alloy wire 221 and the second alloy wire 222 are disposed along a first direction, the third alloy wire 223 and the fourth alloy wire 224 are disposed along a second direction, the first alloy wire 221 and the third alloy wire 223 are connected to the first connecting arm 2221, and the second alloy wire 222 and the fourth alloy wire 224 are connected to the second connecting arm 2222. The first alloy wire 221, the second alloy wire 222, the third alloy wire 223 and the fourth alloy wire 224 are disposed around the movable plate 220. In this arrangement, two alloy wires are disposed in the first direction and the second direction, so that the movable plate 220 is integrally driven to move, the movable plate 220 is prevented from rotating during movement, and the stability of the lens assembly 300 during displacement compensation is improved.

Moreover, an end of the first alloy wire 221 away from the first connecting arm 2221 and an end of the fourth connecting pin away from the second connecting arm 2222 are integrally pressed on the supporting body 210, and an end of the second alloy wire 222 away from the second connecting arm 2222 and an end of the third connecting pin away from the first connecting arm 2221 are integrally pressed on the supporting body 210 and are electrically connected to the circuit on the substrate 110.

The working principle of the memory alloy actuator 200 in the present embodiment is: when the memory alloy 230 is energized, the memory alloy 230 generates heat after being energized, and further deforms to achieve expansion and contraction. The amount of expansion and contraction can be controlled by controlling the current, the time of current application, and the like, so that displacement compensation can be accurately performed.

Referring to fig. 1 again, the lens assembly 300 is used for passing light and achieving optical zooming along the optical axis of the lens module 100, and the lens assembly 300 is mounted on the memory alloy actuator 200 and moves along the direction perpendicular to the optical axis of the lens module 100 along with the memory alloy actuator 200 to achieve the anti-shake effect. The lens assembly 300 is disposed on a side of the memory alloy actuator 200 away from the image sensor 120.

Referring to fig. 1 and 4, the lens assembly 300 includes a liquid optical lens 310, and the liquid optical lens 310 can realize the macro zoom function of the lens assembly 300 without physical movement in the optical axis direction of the lens module 100. Specifically, the liquid optical lens 310 has a containing cavity 316, the containing cavity 316 is filled with a first liquid 317 and a second liquid 318 that are immiscible with each other, external light enters the image sensor 120 through the first liquid 317 and the second liquid 318 and the light-transmitting portion 211, and when the curvature of the interface between the first liquid 317 and the second liquid 318 changes, the light is deflected when passing through the interface between the first liquid 317 and the second liquid 318, thereby implementing the function of macro zooming.

In some embodiments, the curvature of the interface between the first liquid 317 and the second liquid 318 changes as the electric field applied to the first liquid 317 and the second liquid 318 changes, wherein the first liquid 317 is, for example, water and the second liquid 318 is, for example, silicone oil, and the water has a refractive index smaller than the silicone oil and is immiscible with each other. When an electric field is applied to the first liquid 317 and the second liquid 318, since water is ionized and silicone oil is not ionized, the interface between the first liquid 317 and the second liquid 318 is bent to form a convex lens or a concave lens, and the curvature is changed accordingly, thereby realizing zooming.

As an embodiment, referring to fig. 4, the liquid-state optical lens 310 includes a first transparent window 311, a second transparent window 312, a first electrode sheet 313 and a second electrode sheet 314, the first transparent window 311 and the second transparent window 312 are disposed opposite to each other, a receiving cavity 316 is formed between the first transparent window 311 and the second transparent window 312, the first transparent window 311 and the second transparent window 312 can allow light to pass through, and a surface of the first transparent window 311 facing the receiving cavity 316 and a surface of the second transparent window 312 facing the receiving cavity 316 can be subjected to hydrophobic treatment to reduce surface tension, so that the first liquid 317 and the second liquid 318 are more likely to flow in the receiving cavity 316, and water is collected in the receiving cavity 316 in a dome shape to form a predetermined interface curvature.

The first electrode piece 313 is arranged in the accommodating cavity 316 and is adjacent to the first transparent window 311, the second electrode piece 314 is arranged in the accommodating cavity 316 and is adjacent to the second transparent window 312, the first electrode piece 313 and the second electrode piece 314 are electrically insulated, the first electrode piece 313 and the second electrode piece 314 are electrically connected with an external power supply or a circuit on the substrate 110 so as to apply an electric field to the first liquid 317 and the second liquid 318, and when the electric field applied to the first liquid 317 and the second liquid 318 is changed, the curvature of an interface between the first liquid 317 and the second liquid 318 is changed accordingly.

A flexible membrane 315 may be disposed between the first liquid 317 and the second liquid 318, the flexible membrane 315 may function to separate the first liquid 317 and the second liquid 318, and since the flexible membrane 315 may be deformed, the flexible membrane 315 may be deformed when the first liquid 317 or the second liquid 318 flows. At this time, when light enters the accommodating cavity 316, the light enters the flexible film 315 from the first liquid 317 and then enters the second liquid 318, or enters the flexible film 315 from the second liquid 318 and then enters the first liquid 317, so that the first liquid 317 and the second liquid 318 may be liquids with the same or different refractive indexes, and the refractive index of the material of the flexible film 315 may be different from that of the first liquid 317 or the second liquid 318.

In some embodiments, the first liquid 317 and the second liquid 318 may also be in direct contact, i.e., the flexible membrane 315 is not provided, when the first liquid 317 and the second liquid 318 have different densities. For example, when the density of the first liquid 317 is greater than that of the second liquid 318, the second liquid 318 floats on the surface of the first liquid 317 and forms an interface, and when the curvature of the interface between the first liquid 317 and the second liquid 318 changes, it is equivalent to form a convex lens or a concave lens at the interface between the first liquid 317 and the second liquid 318, thereby achieving zooming. It should be noted that, at this time, refractive indexes of the first liquid 317 and the second liquid 318 are not equal, so that when light enters the second liquid 318 from the first liquid 317 or enters the first liquid 317 from the second liquid 318, the light is deflected, and further, a propagation path of the light is changed, thereby achieving zooming.

In one embodiment, the refractive index of the first liquid 317 is smaller than the refractive index of the second liquid 318, and the first liquid 317 is located on a side of the second liquid 318 away from the image sensor 120. The advantages of such an arrangement are: when light enters the lens module 100 from the outside and finally enters the image sensor 120, the light is totally reflected when the first liquid 317 with a small refractive index enters the second liquid 318 with a large refractive index, so that when the curvature of the interface between the first liquid 317 and the second liquid 318 is changed, a larger curvature change range can be provided, and a smaller microspur can be realized. Of course, it should be noted that in other embodiments, the first liquid 317 may be located on a side of the second liquid 318 close to the image sensor 120.

In some embodiments, referring to fig. 1 again, the lens assembly 300 further includes a plastic lens 320, and the plastic lens 320 is adjacent to the liquid optical lens 310 and located on a side of the liquid optical lens 310 away from the image sensor 120. The plastic lens 320 can be used to protect the liquid optical lens 310 and can be used as the outermost lens of the whole lens module 100, the plastic lens 320 can be one, two or more, and when the plastic lens 320 is two or more, the plastic lenses 320 can be adjacently overlapped.

It is understood that the lens set 300 may further include one or more lenses, and the one or more lenses may be disposed between the liquid optical lens 310 and the memory alloy actuator 200, and when assembled, the one or more lenses may be directly assembled with the memory alloy actuator 200 and press-molded with the memory alloy 230. The liquid optical lens 310 may be pre-assembled with the plastic lens assembly 300 and then assembled to the side of the one or more lenses away from the memory alloy actuator 200. In addition, during assembly, the optical axes of the plastic lens set 300, the liquid optical lens 310 and one or more lenses substantially coincide with each other and correspond to the light-transmitting portion 211.

Referring to fig. 4, 5 and 6, the liquid optical lens 310 works according to the following principle: when the macro zoom is required, the first electrode plate 313 and the second electrode plate 314 are powered on, and the voltage value is adjusted to a predetermined value, at which time the curvature of the interface between the first liquid 317 and the second liquid 318 changes. For example only, taking the first liquid 317 as water and the second liquid 318 as silicone oil on the side of the second liquid 318 away from the image sensor 120, when the voltage is from 0, referring to fig. 4, the interface between the first liquid 317 and the second liquid 318 is in a convex lens shape, and when light enters from the first transparent window 311 and passes through the interface between the first liquid 317 and the second liquid 318, the light diverges to enter the image sensor 120 in a direction away from the optical axis. When the voltage gradually increases, referring to fig. 5, the interface between the first liquid 317 and the second liquid 318 gradually changes to be perpendicular to the optical axis, and then the external light can directly enter the image sensor 120, and the voltage value is a critical value. As the voltage continues to rise, referring to fig. 6, the interface between the first liquid 317 and the second liquid 318 changes gradually to a concave lens type, and when light enters from the first transparent window 311 and passes through the interface between the first liquid 317 and the second liquid 318, the light converges into the image sensor 120 in a direction away from the optical axis. Therefore, after the distance of the object to be photographed with respect to the image sensor 120 is determined, the macro photography can be achieved by adjusting the electric field voltage applied to the first liquid 317 and the second liquid 318.

Note that the threshold value is a value related to parameters such as the refractive index of the first liquid 317 and the refractive index of the second liquid 318.

In other embodiments, the liquid optical lens 310 may also change the curvature of the interface between the first liquid 317 and the second liquid 318 by means of physical pressure. For example: the first transparent window 311 or the second transparent window 312 is bent by physical squeezing, so that the configuration of the accommodating cavity 316 is changed, and the curvature of the interface between the first liquid 317 and the second liquid 318 is further changed.

The lens module 100 may further include a filter 130, where the filter 130 may be an infrared filter that only transmits infrared light, and the filter 130 may be disposed adjacent to the image sensor 120 and between the image sensor 120 and the light-transmitting portion 211. As an embodiment, the lens module 100 may further include a package 140, and the package 140 encapsulates the memory alloy actuator 200, the substrate 110, the image sensor 120, and other components, wherein a portion of the lens assembly 300 may be exposed out of the package 140.

In the lens module 100 of the present embodiment, the deformation of the memory alloy 230 realizes the movement of the memory alloy actuator 200 in the direction perpendicular to the optical axis, so as to realize the anti-shake function; while macro-zooming in the direction of the optical axis is achieved by the liquid optics 310. Since the lens assembly 300 does not need to be physically moved during focusing, the focusing can be completed by changing the voltage applied to the lens assembly 300. Therefore, the overall lens module 100 is smaller in size and more suitable for various types of electronic devices. In addition, since the liquid optical lens 310 and the memory alloy actuator 200 are non-magnetic, the lens module 100 will not interfere with external magnetic field and will not be interfered by external magnetic field; when a plurality of cameras are arranged, the mutual interference can be avoided, the interference to a loudspeaker and an antenna of the whole machine can be avoided, and in addition, the power consumption is also reduced.

Referring to fig. 7, the present embodiment further provides an electronic device 10, the electronic device 10 includes a housing 20 and the lens module 100, and the lens module 100 is mounted on the housing 20 and can receive external light. It is understood that the electronic device 10 may be equipped with one or more lens modules 100, and in some embodiments, the electronic device 10 may also be equipped with one or more other types of lens modules 100.

The electronic device 10 may further include a processing unit 30, the processing unit 30 may be formed by one or more processors, and the processing unit 30 may be electrically connected to the circuit on the substrate 110 to control the memory alloy actuator 200 and the liquid optical lens 310, so as to automatically control the lens module 100 to perform the displacement compensation and the macro zooming.

In this embodiment, the housing 20 of the electronic device 10 includes a middle frame 21, a front cover 22 and a rear cover (not shown), wherein the front cover 22 and the rear cover are both assembled to the middle frame 21 and located at two opposite sides of the middle frame 21, and the lens module 100 can be disposed in the middle frame 21 and exposed from the front cover 22 or the rear cover. In some embodiments, the outer side of the middle frame 21 may further have a mounting hole, the lens module 100 may further be disposed inside the middle frame 21 and lifted or retracted from the mounting hole of the middle frame 21 by a lifting device, when the lens module 100 is lifted, the lens module 100 extends out of the middle frame 21, and when the lens module 100 is retracted, the lens module 100 is accommodated inside the middle frame 21.

The electronic device 10 may further include one or more display screens 40, the display screens 40 may be L CD screens, L ED screens, O L ED screens, etc., the display screens 40 may be mounted to the center frame 21 and on the same side as the front cover 22, for example, and the front cover 22 may be disposed around the display screens 40.

The electronic device 10 provided by the present application adopts the lens module 100, and the size of the lens module 100, especially the size along the optical axis of the lens module 100, is small, so that the electronic device can be thinner and thinner. Since the liquid optical lens 310 and the memory alloy actuator 200 are non-magnetic, the lens module 100 will not interfere with external magnetic field and will not be interfered by external magnetic field; when a plurality of cameras are arranged, the mutual interference can be avoided, the interference to a loudspeaker and an antenna of the whole machine can be avoided, and in addition, the power consumption is also reduced.

The electronic device 10 in the present application may be a mobile phone or smart phone (e.g., an iPhone (TM) based, Android (TM) based phone), a Portable gaming device (e.g., a Nintendo DS (TM), a PlayStation Portable (TM), a Game Advance (TM), an iPhone (TM)), a laptop, a PDA, a Portable Internet appliance, a music player and data storage device, other handheld devices and head-mounted devices such as a watch, a headset, a pendant, a headset, etc., the electronic device 10 may also be other wearable devices (e.g., a head-mounted device (HMD) such as electronic glasses, electronic clothing, an electronic bracelet, an electronic necklace, an electronic tattoo, the electronic device 10, or a smart watch).

The electronic device 10 may also be any of a number of electronic devices 10, including, but not limited to, cellular telephones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, vehicle transportation equipment, calculators, programmable remote controls, pagers, laptop computers, desktop computers, printers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving Picture experts group (MPEG-1 or MPEG-2) Audio layer 3(MP3) players, portable medical devices, and digital cameras, and combinations thereof.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lens module, comprising:

a substrate;

an image sensor disposed on the substrate;

a memory alloy actuator disposed on the substrate; and

the lens group comprises a liquid optical lens, the lens group is arranged on the memory alloy actuator and is positioned on the side of the memory alloy actuator far away from the image sensor, and the memory alloy actuator is used for driving the lens group to move in a direction perpendicular to an optical axis for jitter compensation.

2. The lens module as claimed in claim 1, wherein the memory alloy actuator includes a support body, a movable plate, and a memory alloy, the support body being fixed to the substrate and having a light-transmitting portion through which light passes, the light-transmitting portion being located on an optical axis of the image sensor; the movable plate is movably arranged on the support body, and the memory alloy is connected between the support body and the movable plate and is used for driving the movable plate to move along the direction perpendicular to the optical axis of the image sensor so as to drive the lens group to perform shake compensation.

3. The lens module as claimed in claim 2, wherein the movable plate comprises a body and at least two connecting arms, the body defines a through hole for engaging with the light-transmissive portion, the connecting arms are connected to an outer edge of the body, and the memory alloy is connected to the connecting arms.

4. The lens module as claimed in claim 3, wherein the memory alloy includes at least two wires, one end of the wire is connected to one of the connecting arms, and the other end of the wire is connected to the supporter, the at least two wires are respectively disposed along a first direction and a second direction, and the first direction and the second direction are different directions.

5. The lens module as recited in claim 3, wherein the at least two connecting arms comprise a first connecting arm and a second connecting arm, and the first connecting arm and the second connecting arm are axisymmetric along an optical axis of the image sensor.

6. The lens module as claimed in claim 5, wherein the memory alloy includes a first alloy wire, a second alloy wire, a third alloy wire and a fourth alloy wire, the first alloy wire and the second alloy wire are disposed along a first direction, the third alloy wire and the fourth alloy wire are disposed along a second direction, the first direction and the second direction are different directions, the first alloy wire and the third alloy wire are connected to the first connecting arm, and the second alloy wire and the fourth alloy wire are connected to the second connecting arm.

7. The lens module as claimed in any one of claims 2-6, wherein the light-transmissive portion includes a light-transmissive hole opened in the body.

8. The lens module as claimed in any one of claims 1-6, wherein the liquid optical lens has a receiving cavity filled with a first liquid and a second liquid that are immiscible, and a curvature of an interface between the first liquid and the second liquid changes with a change in an electric field applied to the first liquid and the second liquid.

9. The lens module as recited in claim 8, wherein the liquid optic lens comprises a first transparent window, a second transparent window, a first electrode sheet and a second electrode sheet, the first transparent window and the second transparent window being disposed opposite to each other, the receiving cavity being formed between the first transparent window and the second transparent window, the first electrode sheet being disposed in the receiving cavity and adjacent to the first transparent window, the second electrode sheet being disposed in the receiving cavity and adjacent to the second transparent window, the first electrode sheet and the second electrode sheet being electrically insulated from each other.

10. The lens module as recited in claim 9, wherein the liquid optic lens further comprises a flexible membrane positioned within the receiving cavity and separating the first liquid and the second liquid.

11. The lens module as recited in claim 9, wherein the first liquid and the second liquid have different refractive indices.

12. The lens module as recited in claim 11, wherein a refractive index of the first liquid is less than a refractive index of the second liquid, the first liquid being located on a side of the second liquid away from the image sensor.

13. The lens module as recited in claim 8, wherein the lens group further includes a plastic lens adjacent to the liquid optical lens and located on a side of the liquid optical lens away from the image sensor.

14. An electronic device, comprising:

a housing; and

the lens module of any one of claims 1-13, the lens module being mounted to the housing.