CN116699740A - Lens module and electronic device - Google Patents

Abstract

The application provides a lens module and an electronic device, comprising a circuit board, a photosensitive chip, a base and a lens assembly, wherein the photosensitive chip is arranged on the circuit board; the base is arranged on the circuit board and is provided with a containing cavity, and the photosensitive chip is contained in the containing cavity. The lens assembly comprises a lens barrel, a first lens and a second lens, wherein the lens barrel is arranged on the base and is provided with a central shaft; the first lens is arranged in the lens barrel. The second lens is arranged in the lens barrel and is positioned between the first lens and the base, the second lens comprises a liquid lens and an electric connecting piece, the liquid lens comprises an incompatible conductive liquid and an incompatible insulating liquid, an interface is arranged between the conductive liquid and the insulating liquid, the electric connecting piece comprises a first electrode and a second electrode which are oppositely arranged along the direction of a central shaft, one ends of the first electrode and the second electrode are positioned in the conductive liquid and are used for applying voltage to the electric connecting piece, so that the curvature of the interface is changed, and the focal length of the lens module is adjusted.

Description

Lens module and electronic device

Technical Field

The present application relates to the field of lens technologies, and in particular, to a lens module and an electronic device.

Background

The lens module is generally provided with a plurality of lenses, and the shape and focal plane position of each lens are fixed, so that the relative position of each lens can be changed only based on mechanical movement, the change of the focal length of the lens module is realized, and images with different working distances are acquired. For example, a voice coil motor is installed in the lens module, and the voice coil motor can drive the lenses or lens groups in the lens to move along the optical axis, and the distance between the lenses or between the lenses and the focal plane is changed.

However, since focusing is required, the overall volume of the lens module is large.

Disclosure of Invention

In view of the above, the present application provides a lens module for solving the above problems.

In addition, it is also necessary to provide an electronic device with the lens module.

The application provides a lens module, which comprises a circuit board, a photosensitive chip, a base and a lens assembly, wherein the photosensitive chip is arranged on the circuit board; the base is arranged on the circuit board and is provided with an accommodating cavity, and the photosensitive chip is accommodated in the accommodating cavity.

The lens assembly comprises a lens barrel, a first lens and a second lens, the lens barrel is arranged on the base, and the lens barrel is provided with a central shaft; the first lens is arranged in the lens cone. The second lens is arranged in the lens barrel and is positioned between the first lens and the base, the second lens comprises a liquid lens and an electric connecting piece, the liquid lens comprises an immiscible conductive liquid and an insulating liquid, an interface is arranged between the conductive liquid and the insulating liquid, the electric connecting piece comprises a first electrode and a second electrode which are oppositely arranged along the central axis direction, one ends of the first electrode and the second electrode are both positioned in the conductive liquid, and the electric connecting piece is used for applying voltage, so that the curvature of the interface is changed, and the focal length of the lens module is adjusted.

In some embodiments, the surface of the first electrode and the second electrode that is adjacent to each other is an insulating layer.

In some embodiments, the lens module further includes a carrier, the carrier includes a transparent bottom wall, a side wall extending from the bottom wall toward the first lens, and a top wall surrounding the side wall and away from the bottom wall, and the bottom wall, the side wall, and the top wall form a receiving slot for receiving the liquid lens.

In some embodiments, the first electrode and the second electrode are each located between the top wall and the bottom wall.

In some embodiments, the first electrode and the second electrode are each ring-shaped structures having indentations.

In some embodiments, the liquid lens further comprises a transparent sealing body having elasticity, the conductive liquid comprises one of saline or sodium sulfate, and the insulating liquid comprises one of silicone oil or alcohol.

In some embodiments, the first electrode and the second electrode are fixed to an inner sidewall of the sealing body.

In some embodiments, the first lens includes a plurality of lenses, and a spacer ring is further disposed between the plurality of lenses.

In some embodiments, an adhesive layer is further disposed between the base and the circuit board.

The application also provides an electronic device, which comprises the lens module.

In the application, the second lens comprises the liquid lens, and the curvature of the interface can be adjusted by applying voltage to the liquid lens, so that the focal length of the lens assembly can be changed; meanwhile, in the application, the liquid lens is arranged between the first lens and the base, and the arrangement plays a role in protecting the liquid lens, so that the liquid lens is prevented from being scratched when the lens module falls and is positioned at the end part of the lens barrel away from the base, and the liquid lens is protected.

Drawings

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

Fig. 2 is a schematic structural diagram of the connection between the carrier and the liquid lens in the lens module in the embodiment shown in fig. 1.

Fig. 3 is a schematic diagram illustrating a state of the liquid lens when no voltage is applied to the lens module in the embodiment shown in fig. 1.

Fig. 4 is a schematic diagram illustrating a state of the liquid lens when a voltage is applied to the lens module in the embodiment shown in fig. 1.

Fig. 5 is a schematic diagram illustrating a state of the liquid lens when the lens module applies a reverse voltage in the embodiment shown in fig. 1.

Fig. 6 is a schematic structural diagram of an electronic device using a lens module according to an embodiment of the present application.

Description of the main reference signs

Lens module 100

Circuit board 10

Photosensitive chip 11

Base 20

Accommodation chamber 21

Adhesive layer 22

Lens assembly 30

Lens barrel 31

Center shaft 311

Convex edge 312

First lens 32

Lens 321

Spacer ring 322

Second lens 33

Electric connector 331

First electrode 3311

Second electrode 3312

Insulating layer 3313

Power supply unit 332

Controller 3321

Power supply 3322

Liquid lens 333

Sealing body 3331

Conductive liquid 3332

Insulating liquid 3333

Interface 3334

Carrier 334

Bottom wall 3341

Side wall 3342

Top wall 3343

Receiving groove 3344

Optical filter 40

Electronic device 200

Housing 210

The application will be further described in connection with the above-described embodiments of the application in connection with fig. 1-6.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The present application will be described in detail below with reference to the accompanying drawings and embodiments, in order to further explain the technical means and effects of the present application to achieve the intended purpose.

Referring to fig. 1, an embodiment of the application provides a lens module 100, wherein the lens module 100 includes a circuit board 10, a photo-sensing chip 11, a base 20, a lens assembly 30 and a filter 40, and the photo-sensing chip 11 and the base 20 are disposed on the circuit board 10. The base 20 has a receiving cavity 21, and the photosensitive chip 11 is received in the receiving cavity 21. The lens assembly 30 is disposed on the base 20.

In some embodiments, an adhesive layer 22 is further disposed between the base 20 and the circuit board 10 to fix the base 20 to the circuit board 10.

Referring to fig. 1, the lens assembly 30 includes a barrel 31, a first lens 32 and a second lens 33, the barrel 31 is disposed on the base 20, and the barrel 31 has a central axis 311. In some embodiments, the barrel 31 may be threadably coupled with the base 20. The inner wall of the lens barrel 31 extends toward the central axis 311 to form a convex edge 312, and the filter 40 is disposed on the convex edge 312. The first lens 32 and the second lens 33 are disposed in the barrel 31 at intervals. The first lens 32 is located at an end of the barrel 31 remote from the base 20. The first lens 32 includes a plurality of lenses 321, the plurality of lenses 321 are spherical or aspherical lenses, and the number of lenses 321 can be determined according to practical needs. The lens 321 may be fixed on the inner wall of the lens barrel 31 by bonding or screwed into the lens barrel 31, and the connection mode of the lens 321 in the lens barrel 31 is not limited.

In some embodiments, a spacer ring 322 is further disposed between adjacent lenses 321, and a central axis 311 of the spacer ring 322 is coaxial with the central axis 311 of the lens barrel 31. The spacer ring 322 is disposed to space the plurality of lenses 321 and control the light flux.

Referring to fig. 1 and 2, the second lens 33 is disposed between the filter 40 and the first lens 32 at intervals. The second lens 33 includes a liquid lens 333, a carrier 334, and an electrical connector 331. The carrier 334 has a bottom wall 3341, a side wall 3342 extending from the bottom wall 3341 toward the first lens 32, and a top wall 3343 surrounding the side wall 3342 and far from the bottom wall 3341. The bottom wall 3341, side walls 3342 and top wall 3343 define a sealed receiving slot 3344. The top wall 3343 and the bottom wall 3341 are made of transparent materials, and do not affect the transmission of external light. The liquid lens 333 is accommodated in the accommodating groove 3344, and a central axis of the liquid lens 333 is collinear with the central axis 311 of the lens barrel 31. In some embodiments, both the top wall 3343 and the bottom wall 3341 are made of a transparent resin or polyimide, or the entire carrier 334 is made of a transparent material. In some embodiments, the liquid lens 333 is completely accommodated in the accommodating groove 3344 of the carrier 334.

Referring to fig. 1 and 2, the liquid lens 333 includes a sealing body 3331, and a conductive liquid 3332 and an insulating liquid 3333 disposed in the sealing body 3331. Wherein the conductive liquid 3332 and the insulating liquid 3333 are mutually insoluble and have different refractive indexes. In some embodiments, the conductive liquid 3332 is one of saline or sodium sulfate, and the insulating liquid 3333 comprises one of silicone oil or alcohol, wherein the insulating liquid 3333 is positioned on the conductive liquid 3332. The sealing member 3331 is made of elastic material. In some embodiments, the sealing body 3331 may be a polycarbonate film or a polyimide film having a higher light transmittance.

Referring to fig. 1 and 2, the electrical connector 331 includes a first electrode 3311, a second electrode 3312, and a power supply portion 332 disposed on the circuit board 10, wherein one ends of the first electrode 3311 and the second electrode 3312 are respectively contacted with the conductive liquid 3332 in the liquid lens 333, and the other ends of the first electrode 3311 and the second electrode 3312 are respectively extended out of the liquid lens 333 and connected with a wire (not shown) which passes through a corresponding sidewall 3342 of the carrier 334 and extends to the circuit board 10 along an inner wall (such as a groove) of the lens barrel 31, and is in communication with the power supply portion 332 on the circuit board 10. The first electrode 3311 and the second electrode 3312 are located between the top wall 3343 and the bottom wall 3341. In some embodiments, the power supply 332 includes a controller 3321 and a power supply 3322, the controller 3321 configured to control the power supply 3322 to provide voltages to the first electrode 3311 and the second electrode 3312. The controller 3321 is accommodated in the accommodating cavity 21 of the base 20, and the power supply 3322 may be disposed outside the base 20 or may share other power supplies on the circuit board 10. Thus, compared to the liquid lens 333 disposed at an end of the barrel 31 far from the base 20, the present application reduces the volume occupied by the power supply 3322 alone in the barrel 31, and the liquid lens 333 is close to the circuit board 10 to further reduce the length of the wires. On the other hand, since the liquid lens 333 is disposed between the first lens 32 and the optical filter 40, when the lens falls, the first lens 32 can also prevent the liquid lens 333 from being damaged, and further protect the liquid lens 333, so as to prevent the surface of the sealing body 3331 from being scratched when the liquid lens 333 approaches the end of the lens barrel 31 far from the base 20. In some embodiments, the base 20 and the second lens 33 are integrally formed, the first lens 32 is fixed on the second lens 33 by threads or bonding, and various structures of the first lens 32 on the second lens 33 can be adjusted according to the requirements, so that the practicability is high.

Referring to fig. 1 and 2, in some embodiments, an AC/DC converter is further connected to the power supply 3322, so that the voltage value of the power supply 3322 can be changed to provide the first electrode 3311 and the second electrode 3312. When the power supply 3322 applies a voltage to the liquid lens 333, ions in the conductive liquid 3332 move towards the corresponding first electrode 3311 or second electrode 3312 under the action of the electric field, so that the electric quantity on the opposite surfaces of the liquid lens 333 changes, and the surface tension required for reaching a stable state between the conductive liquid 3332 and the insulating liquid 3333 in the liquid lens 333 and between the conductive liquid 3332 and the insulating liquid 3333 and the inner wall of the liquid lens 333 changes, thereby changing the curvature of the interface 3334 between the conductive liquid 3332 and the insulating liquid 3333 and further changing the curvature of the lens assembly 30.

Referring to fig. 2 and 3, when no voltage is applied between the first electrode 3311 and the second electrode 3312, since the conductive liquid 3332 and the insulating liquid 3333 are mutually incompatible, the interface 3334 between the conductive liquid 3332 and the insulating liquid 3333 naturally forms a film under the surface tension of interaction, and at this time, the focal length of the interface 3334 is fixed.

Referring to fig. 2 and 4, when a voltage is applied to the first electrode 3311 and the second electrode 3312, the first electrode 3311 is in communication with the positive electrode of the power supply 3322, and more anions in the conductive liquid 3332 are adsorbed on the first electrode 3311, so that an attractive electrostatic force is generated between the conductive liquid 3332 and the first electrode 3311, the shape of the interface 3334 is adjusted under the action of the electrostatic force, the interface 3334 is concave towards the direction of the optical filter 40, and the curvature of the interface 3334 is changed.

Referring to fig. 2 and 5, conversely, a reverse voltage is applied between the first electrode 3311 and the second electrode 3312, the first electrode 3311 is in negative communication with the power source 3322, the voltage between the first electrode 3311 and the second electrode 3312 is adjusted, the interface 3334 is protruded toward a direction away from the optical filter 40, and the curvature of the interface 3334 is changed, so that the focal length of the lens assembly 30 is adjusted.

Referring to fig. 2, the surfaces of the first electrode 3311 and the second electrode 3312 close to each other are insulating layers 3313, which are coated on the first electrode 3311 and the second electrode 3312 by coating to prevent the first electrode 3311 and the second electrode 3312 from being in contact with each other to generate a short circuit.

Referring to fig. 2, in some embodiments, the first electrode 3311 and the second electrode 3312 are rings with a notch, so that more ions in the conductive liquid 3332 are adsorbed onto the first electrode 3311 or the second electrode 3312.

Referring to fig. 2, in some embodiments, the first electrode 3311 and the second electrode 3312 are both fixed to an inner sidewall 3342 of a sealing body 3331 of the liquid lens 333 so that an interface 3334 in the liquid lens 333 is deformed as much as possible along the central axis 311.

Referring to fig. 1 and 2, in some embodiments, the first electrode 3311 and the second electrode 3312 completely hold the sealing member 3331 against the top wall 3343 and the bottom wall 3341 in the direction of the central axis 311 to avoid deformation of the liquid lens 333 in the direction toward the side wall 3342.

In some embodiments, the side wall 3342 of the carrier 334 is fixed on the inner wall of the lens barrel 31 by a screw thread or an adhesive, or the inner wall of the lens barrel 31 extends toward the central shaft 311 to form a boss (not shown) for supporting the fixed carrier 334.

Referring to fig. 6, the present application further provides an electronic device 200, where the electronic device 200 includes a lens module 100 and a housing 210, and the lens module 100 is disposed on the housing 210. The lens module 100 can be applied to various electronic devices 200 having a camera module, such as a mobile phone, a wearable device, a vehicle, a camera, or a monitoring device. The lens module 100 can be applied to a dual/multi-camera module such as a vehicle, security, tablet, transmitter or 3D sensing. In this embodiment, the lens module 100 is applied to a mobile phone.

In the present application, the second lens 33 includes a liquid lens 333, and the curvature of the interface 3334 can be adjusted by applying a voltage to the liquid lens 333, so that the focal length of the lens module 100 can be changed, therefore, in the focusing process of the present application, a mechanical driving structure is not required, and compared with the focusing mode of driving a lens by a voice coil motor, the overall volume of the lens module 100 is reduced, and the focusing speed is improved; meanwhile, in the present application, the liquid lens 333 is disposed between the first lens 32 and the base 20, and this arrangement protects the liquid lens 333, so as to prevent the liquid lens 333 from being scratched when the lens module 100 falls down and the lens barrel 31 is located at the end portion far away from the base 20, thereby protecting the liquid lens 333.

Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. A lens module, comprising:

a circuit board;

the photosensitive chip is arranged on the circuit board;

the base is arranged on the circuit board and is provided with a containing cavity, and the photosensitive chip is contained in the containing cavity;

a lens assembly, comprising:

the lens barrel is arranged on the base and is provided with a central shaft;

a first lens disposed in the lens barrel;

the second lens is arranged in the lens barrel and is positioned between the first lens and the base, the second lens comprises a liquid lens and an electric connecting piece, the liquid lens comprises an immiscible conductive liquid and an insulating liquid, an interface is formed between the conductive liquid and the insulating liquid, the electric connecting piece comprises a first electrode and a second electrode which are oppositely arranged along the central axis direction, one ends of the first electrode and the second electrode are both positioned in the conductive liquid, and the electric connecting piece is used for applying voltage, so that the curvature of the interface is changed, and the focal length of the lens module is adjusted.

2. The lens module as claimed in claim 1, wherein surfaces of the first electrode and the second electrode which are close to each other are insulating layers.

3. The lens module of claim 2, further comprising a carrier comprising a transparent bottom wall, a side wall extending from the bottom wall toward the first lens, and a top wall surrounding the side wall and away from the bottom wall, the side wall, and the top wall forming a receiving channel for receiving the liquid lens.

4. A lens module as recited in claim 3, wherein the first electrode and the second electrode are each located between the top wall and the bottom wall.

5. The lens module as claimed in claim 4, wherein the first electrode and the second electrode are ring structures having notches.

6. The lens module as claimed in claim 5, wherein the liquid lens further comprises a transparent sealing body having elasticity, the conductive liquid comprises one of saline or sodium sulfate, and the insulating liquid comprises one of silicone oil or alcohol.

7. The lens module of claim 6, wherein the first electrode and the second electrode are fixed to an inner sidewall of the sealing body.

8. The lens module as claimed in claim 1, wherein the first lens includes a plurality of lenses, and a spacer ring is further disposed between the plurality of lenses.

9. The lens module of claim 1, wherein an adhesive layer is further disposed between the base and the circuit board.

10. An electronic device comprising a lens module as claimed in any one of claims 1-9.