CN221306007U

CN221306007U - Automatic focusing anti-shake camera module based on liquid lens

Info

Publication number: CN221306007U
Application number: CN202322935577.9U
Authority: CN
Inventors: 晏政波; 沈超; 古昌根; 朱治平
Original assignee: Chongqing TS Precision Technology Co Ltd
Current assignee: Chongqing TS Precision Technology Co Ltd
Filing date: 2023-10-31
Publication date: 2024-07-09
Anticipated expiration: 2033-10-31

Abstract

The utility model discloses an automatic focusing anti-shake camera module based on a liquid lens, which is characterized in that: the liquid lens module comprises an iron shell, a liquid lens module, a driving module, a solid lens module, an optical filter module, a photosensitive chip and a circuit board which are sequentially arranged from top to bottom, wherein the iron shell is connected to the solid lens module and covers the liquid lens module and the driving module; the driving assembly comprises a magnet set, a coil set and a coil circuit board, wherein the magnet set is attached to the lens supporting piece, the coil set is electrically connected with the coil circuit board, and one end of the coil circuit board is electrically connected with the circuit board. Controllable current is introduced, and the up-and-down movement and deflection of the magnet group can be accurately controlled, so that the focal length adjustment and the anti-shake of the liquid lens are realized. The beneficial effects of the utility model include: the automatic focusing and the optical anti-shake of the camera module with the liquid lens can be simultaneously realized; the structure is simple, the assembly steps are few, and the manufacturing difficulty is low; compact structure can realize miniaturization.

Description

Automatic focusing anti-shake camera module based on liquid lens

Technical Field

The utility model relates to the field of camera modules, in particular to an automatic focusing anti-shake camera module based on a liquid lens.

Background

The camera module is an important component of the intelligent equipment, and in recent years, the requirements of consumers on functions such as automatic focusing, optical anti-shake and the like of the camera module are higher and higher when the intelligent equipment is used. At present, a voice coil motor is commonly used for realizing focusing and anti-shake of a camera, and the voice coil motor in the prior art has the defects of complex framework, complicated assembly steps, large volume, heavy weight and the like. In general, a liquid lens performs functions such as focal length adjustment by changing the curvature of a liquid interface by applying a driving force to a chamber containing the liquid. The liquid lens can realize ultra-close focusing and optical anti-shake, has high focusing speed and light weight, and is suitable for miniaturized camera modules, so that the liquid lens is gradually applied to intelligent devices such as mobile phones, flat plates and the like in recent years. The prior art camera module with liquid lenses is often used for realizing automatic focusing, but few schemes for realizing optical anti-shake can be realized at the same time. In addition, the driving force application mode of the liquid lens in the prior art mainly comprises a voice coil motor, an SMA motor, a piezoelectric element and the like, and the prior art has the advantages of precise and complex structure, multiple assembly steps, high manufacturing difficulty and difficult miniaturization.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides an automatic focusing anti-shake camera module based on a liquid lens, which has a small structure, can realize automatic focusing and anti-shake of the liquid lens and has low manufacturing difficulty.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

An automatic focusing anti-shake camera module based on liquid lens, its characterized in that: the liquid lens module comprises an iron shell, a liquid lens module, a driving module, a solid lens module, an optical filter module, a photosensitive chip and a circuit board which are sequentially arranged from top to bottom, wherein the iron shell is connected to the solid lens module and covers the liquid lens module and the driving module;

The liquid lens assembly comprises a liquid lens, a lens supporting piece and a rigid light-transmitting plate, wherein the liquid lens is arranged on the lens supporting piece, and the rigid light-transmitting plate is arranged on the bottom surface of the liquid lens;

The solid-state lens assembly comprises a solid-state lens and a lens seat, the solid-state lens is fixed on the lens seat, the upper end face of the solid-state lens is in contact with the rigid light-transmitting plate, and the lower end face of the lens seat is fixed on the optical filter assembly through painting glue;

the driving assembly comprises a coil group and a coil circuit board which are arranged on the lens seat, and further comprises a magnet group which is arranged on the lens supporting piece, wherein the magnet group is opposite to the coil group, the coil group is electrically connected to the coil circuit board, and the coil circuit board is electrically connected with the circuit board;

the optical filter assembly comprises an optical filter and a support, the optical filter is fixed on the support, and the lower end of the support is fixed on the circuit board through painting glue.

The photosensitive chip is attached to the circuit board and is electrically connected with the circuit board.

Further, the liquid lens comprises an upper flexible light-transmitting film and a lower flexible light-transmitting film, edge areas of the upper flexible light-transmitting film and the lower flexible light-transmitting film are fixed on the lens supporting piece, and a liquid light-transmitting material is filled in a closed space formed between the upper flexible light-transmitting film and the lower flexible light-transmitting film.

Further, the top surface of the lens seat is provided with a plurality of coil positioning posts, and the height of the coil positioning posts is not higher than that of the top surface of the solid-state lens.

Further, the coil group includes three coils uniformly arranged at 120 degrees around the solid-state lens axis.

Further, the coil set comprises four auto-focusing coils, two X-direction anti-shake coils and two Y-direction anti-shake coils, wherein the four auto-focusing coils are distributed at four corners of the top surface of the lens seat, and the two X-direction anti-shake coils are symmetrically distributed in the X direction of the top surface of the lens seat; the Y-direction anti-shake coils are symmetrically distributed on the Y direction of the top surface of the lens seat.

Further, the magnet group is in a circular ring shape.

Further, the length and width dimensions of the iron shell, the driving component and the liquid lens component are all smaller than or equal to the lens base.

The beneficial effects of the utility model include: 1. the automatic focusing and the optical anti-shake of the camera module with the liquid lens can be simultaneously realized;

2. The driving part of the liquid lens only needs 3-8 coils and a magnet group, and has the advantages of simple structure, few assembly steps and low manufacturing difficulty;

3. the length and width directions of the camera module are compact in structure, the height direction can only increase the thickness of the liquid lens module, and miniaturization can be achieved.

Drawings

FIG. 1 is a schematic diagram of an exploded view of a camera module according to the present utility model

FIG. 2 is a schematic view of a liquid lens assembly of the present utility model;

FIG. 3 is a schematic diagram of a coil assembly according to a first embodiment of the present utility model;

FIG. 4 is a schematic view of the camera module of the present utility model in normal focus;

FIG. 5 is a schematic diagram of the camera module of the present utility model in focus;

FIG. 6 is a schematic diagram of the camera module of the present utility model in an anti-shake state;

Fig. 7 is a schematic structural view of a coil assembly according to other embodiments of the present utility model.

Detailed Description

The utility model will be described in further detail with reference to specific embodiments and drawings.

The camera module with the liquid lens shown in fig. 1-7 comprises an iron shell 11, a liquid lens component, a driving component, a solid lens component, an optical filter component, a photosensitive chip 2 and a circuit board 3, wherein the photosensitive chip is shown in fig. 1. The iron case 1 is mounted on the solid lens assembly and encloses the liquid lens assembly and the driving assembly. The liquid lens component comprises a liquid lens 4 composed of an upper flexible light-transmitting film 41, a liquid light-transmitting material 42 and a lower flexible light-transmitting film 43, a lens supporting piece 5 and a rigid light-transmitting plate 6, as shown in fig. 2; the edge areas of the upper and lower flexible light-transmitting films are fixed on the lens support 5 to form a closed container for containing the liquid light-transmitting material 42, and the rigid light-transmitting plate 6 is attached to the lower surface of the lower flexible light-transmitting film. The driving assembly comprises a magnet set 11, a coil set 9 and a coil circuit board 10, wherein the magnet set 11 is attached to the lens supporting piece 5, the coil set 9 is electrically connected with the coil circuit board 10, and one end of the coil circuit board 10 is electrically connected with the circuit board 3. The solid-state lens component comprises a solid-state lens 7 and a lens seat 8, wherein the solid-state lens 7 and the lens seat 8 are locked and fixed by dispensing, and the painting glue is fixed on the optical filter component. The optical filter assembly comprises an optical filter 12 and a bracket 13, wherein the optical filter 12 is attached to the bracket 13, and the optical filter assembly is fixed with the circuit board 3 through painting glue. The photosensitive chip 2 is attached to the circuit board 3 and is electrically connected with the circuit board 3.

Further, the rigid light-transmitting plate 6 in the liquid lens assembly is attached to the lower flexible light-transmitting film 43 on one side and attached to the end face of the solid lens 7 on the other side.

Further, in the driving assembly, the magnet group 11 is used as a rotor, the coil group 9 is used as a stator, and the coil group 9 is electrified to generate a magnetic field to drive the magnet group 11 to move up and down along the optical axis or rotate around the optical axis in a deflection way. The magnet set 11 is attached to the liquid lens supporting piece 5, and the magnet set 11 moves to drive the liquid lens supporting piece to move synchronously, and at the moment, the fixed rigid light-transmitting plate 6 presses the lower flexible light-transmitting film 43 to deform, so that the focal length of the liquid lens 4 is changed.

Further, the magnet group 11 is in a ring shape and is divided into two magnets having different magnetism.

Further, the coil set 9 in the driving assembly includes an auto-focus coil 91, an X-direction anti-shake coil 92, and a Y-direction anti-shake coil 93, as shown in fig. 3. The number of the automatic focusing coils 91 is 4, and the automatic focusing coils are symmetrically distributed at four corners; the number of the X-direction anti-shake coils 92 is two, and the two anti-shake coils are symmetrically distributed in the X direction; the number of the Y-direction anti-shake coils 93 is two, and the Y-direction anti-shake coils are symmetrically distributed in the Y direction. When an automatic focusing signal is received, the automatic focusing coil group drives the magnet group 11 to move up and down along the optical axis, and the magnet group 11 moves up and down along the optical axis to adjust the curvature of the liquid lens, so that an automatic focusing function is realized; when the anti-shake signal is received, the X-direction anti-shake coil 92 or the Y-direction anti-shake coil 93 drives the magnet group 11 to deflect around the optical axis, so that the optical axis of the liquid lens deviates from the optical axis of the solid lens 7, the movement of an image on a photosensitive chip is realized, and the optical anti-shake function is realized; when the automatic focusing and anti-shake signals are received, the coil group 9 drives the magnet group 11 to move up and down along the optical axis of the solid lens and deflect around the optical axis at the same time, so that the optical axis of the liquid lens deviates from the optical axis of the solid lens 7 and moves relative to the solid lens 7, the movement and focusing of the image on the photosensitive chip 2 are realized, and meanwhile, the optical anti-shake and automatic focusing are realized.

Further, in the normal focal length state, no current is input to the coil assembly 9, and the rigid light-transmitting plate 6 does not press the liquid lens, as shown in fig. 4; when the autofocus signal is received, the autofocus coil 91 is energized with current in the same direction and in the same magnitude, driving the magnet set 11 to move up and down along the optical axis direction, and the rigid light-transmitting plate 6 extrudes the liquid lens, as shown in fig. 5; when the anti-shake signal is received, the opposite direction and the same magnitude of current is introduced into the pair of X-direction anti-shake coils 92 or the pair of Y-direction anti-shake coils 93 to drive the magnet group 11 to move around the optical axis so as to compensate the image offset caused by shake, as shown in fig. 6. The controllable current is introduced, so that the up-and-down movement and deflection of the magnet group 11 can be precisely controlled, and the focal length adjustment and the anti-shake of the liquid lens 4 are realized.

Further, the lens mount 8 of the solid-state lens assembly includes a solid-state lens placement cavity, a coil positioning post 81, and an iron-case mounting frame, as shown in fig. 6. The solid lens placing cavity is used for being locked and fixed with the solid lens 7; the number of the coil positioning columns 81 is 8, so that the positioning and the assembly of the coil assembly 9 are facilitated, and the assembly precision of the coil assembly 9 is improved; the iron shell mounting frame is used for positioning and fixing the iron shell 1; the coil assembly 9 and the iron shell 1 are simple to assemble and position, and the manufacturing difficulty is effectively reduced.

Further, the length and width dimensions of the iron shell 1, the driving component and the liquid lens component can be smaller than or equal to the solid lens base 8, so that the structure is compact, and the miniaturization of the camera module in the length and width direction is facilitated.

Further, the shape of the solid-state lens 7 needs to be small, and the coil set 9 can be arranged below the end face of the solid-state lens, so that the height of the camera module can be effectively reduced, as shown in fig. 4; according to the practical application scene, the solid lens 7 with larger head depth is selected, so that the height direction of the module can be realized, and the miniaturization of the height direction of the camera module can be effectively realized only by increasing the thickness of the liquid lens component.

Further, in other embodiments, a minimum of 3 coils can be used in the coil set, 3 coils are used for auto-focusing and anti-shake, and the 3 coils are uniformly distributed at an angle of 120 °, as shown in fig. 7, so that the assembling steps of the camera module can be effectively reduced, the manufacturing difficulty can be reduced, and the cost can be effectively reduced.

The foregoing has described in detail the technical solutions provided by the embodiments of the present utility model, and specific examples have been applied to illustrate the principles and implementations of the embodiments of the present utility model, where the above description of the embodiments is only suitable for helping to understand the principles of the embodiments of the present utility model; meanwhile, as for those skilled in the art, according to the embodiments of the present utility model, there are variations in the specific embodiments and the application scope, and the present description should not be construed as limiting the present utility model.

Claims

1. An automatic focusing anti-shake camera module based on liquid lens, its characterized in that: the liquid lens comprises an iron shell (1), a liquid lens assembly, a driving assembly, a solid lens assembly, an optical filter assembly, a photosensitive chip (2) and a circuit board (3) which are sequentially arranged from top to bottom, wherein the iron shell (1) is connected to the solid lens assembly and covers the liquid lens assembly and the driving assembly;

The liquid lens assembly comprises a liquid lens (4), a lens support (5) and a rigid light-transmitting plate (6), wherein the liquid lens (4) is arranged on the lens support (5), and the rigid light-transmitting plate (6) is arranged on the bottom surface of the liquid lens (4);

The solid-state lens assembly comprises a solid-state lens (7) and a lens holder (8), the solid-state lens (7) is fixed on the lens holder (8), the upper end surface of the solid-state lens (7) is in contact with the rigid light-transmitting plate (6), and the lower end surface of the lens holder (8) is fixed on the optical filter assembly through painting glue;

The driving assembly comprises a coil group (9) and a coil circuit board (10) which are arranged on the lens seat (8), and further comprises a magnet group (11) which is arranged on the lens supporting piece (5), wherein the magnet group (11) is opposite to the coil group (9), the coil group (9) is electrically connected to the coil circuit board (10), and the coil circuit board (10) is electrically connected with the circuit board (3);

The optical filter component comprises an optical filter (12) and a bracket (13), the optical filter (12) is fixed on the bracket (13), the lower end of the bracket (13) is fixed on the circuit board (3) through painting glue,

The photosensitive chip (2) is attached to the circuit board (3) and is electrically connected with the circuit board (3).

2. The liquid lens-based auto-focus anti-shake camera module of claim 1, wherein: the liquid lens (4) comprises an upper flexible light-transmitting film (41) and a lower flexible light-transmitting film (43), edge areas of the upper flexible light-transmitting film (41) and the lower flexible light-transmitting film (43) are fixed on the lens supporting piece (5), and a liquid light-transmitting material (42) is filled in a closed space formed between the upper flexible light-transmitting film (41) and the lower flexible light-transmitting film (43).

3. The liquid lens-based auto-focus anti-shake camera module of claim 1, wherein: the top surface of the lens seat (8) is provided with a plurality of coil positioning columns (81), and the height of the coil positioning columns (81) is not higher than the top surface of the solid-state lens (7).

4. The liquid lens-based auto-focus anti-shake camera module of claim 1, wherein: the coil group (9) comprises three coils which are uniformly arranged at 120 degrees around the axis of the solid-state lens (7).

5. The liquid lens-based auto-focus anti-shake camera module of claim 1, wherein: the coil assembly (9) comprises four automatic focusing coils (91), two X-direction anti-shake coils (92) and two Y-direction anti-shake coils (93), wherein the number of the automatic focusing coils (91) is four, the automatic focusing coils are distributed at four corners of the top surface of the lens seat (8), and the two X-direction anti-shake coils (92) are symmetrically distributed in the X direction of the top surface of the lens seat (8); the number of the Y-direction anti-shake coils (93) is two, and the Y-direction anti-shake coils are symmetrically distributed on the top surface of the lens seat (8).

6. The liquid lens-based auto-focus anti-shake camera module of claim 1, wherein: the magnet group (11) is in a circular ring shape.

7. The liquid lens-based auto-focus anti-shake camera module of claim 1, wherein: the length and width dimensions of the iron shell (1), the driving component and the liquid lens component are all smaller than or equal to those of the lens base (8).