CN116437183A

CN116437183A - Camera module and electronic device

Info

Publication number: CN116437183A
Application number: CN202210079882.XA
Authority: CN
Inventors: 武斌; 张宪先; 冯一明; 翟羽佳
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-12-31
Filing date: 2022-01-24
Publication date: 2023-07-14

Abstract

The embodiment of the application relates to the technical field of camera shooting modules, and aims to solve the problem of miniaturization of the camera shooting modules. The embodiment of the application provides a camera module and an electronic device. The camera module comprises a circuit board, an image sensor and a driving circuit which are arranged on the circuit board, an upper group lens barrel and a lower group lens barrel which are arranged on one side of the image sensor far away from the circuit board, a connecting circuit which is arranged on the lower group lens barrel, and an adjustable lens which is arranged between the upper group lens barrel and the lower group lens barrel. The adjustable lens is electrically connected to the driving circuit through the connecting circuit so as to deform under the driving of the driving circuit, and then the focal power of the camera shooting module is adjusted. The camera module has the advantage of small volume ratio.

Description

Camera module and electronic device

Technical Field

The application relates to the technical field of camera modules, in particular to a camera module and an electronic device applying the camera module.

Background

Due to the rapid development and popularization of intelligent mobile terminals, many emerging industries, such as live broadcast, vlog, short video and other fields requiring rapid and high-quality imaging, are derived, and strong requirements are provided for intelligent terminal equipment: fast Auto Focus (AF), AF module miniaturization, extremely small screen aperture, clear far focus and near focus imaging. The conventional focusing module is preferably a voice coil motor, an externally arranged adjustable lens of a lens group, a double-shot module and the like due to the processing capability and cost. However, the voice coil motor has the disadvantages of complex structure, large volume occupation, poor mechanical reliability, high assembly and matching difficulty, being unfavorable for realizing miniaturization of the module and high risk of failure of the strong magnetic interference of the voice coil motor. The externally arranged adjustable lens of the lens group can increase the total height of the lens, has poor antistatic breakdown performance and high reliability risk, and cannot be used under the front working condition of the mobile terminal. The dual-camera module is unfavorable for the requirements of light weight, low power consumption and the like of the whole machine due to the fact that focusing is not ideal, focusing speed is low, volume occupation is large, power consumption is high, and the requirements of all users on hardware quality and use safety of the intelligent mobile terminal are increased.

Disclosure of Invention

The first aspect of the present application provides a camera module, which includes:

a circuit board;

the image sensor and the driving circuit are positioned on the circuit board;

the upper group lens barrel and the lower group lens barrel are positioned at one side of the image sensor far away from the circuit board;

the connecting circuit is positioned on the lower group lens cone; and

the adjustable lens is arranged between the upper group lens barrel and the lower group lens barrel, and is electrically connected to the driving circuit through the connecting circuit so as to deform under the driving of the driving circuit, and then the focal power of the camera module is adjusted.

Because in the above-mentioned module of making a video recording, adjustable lens is built-in between last crowd's lens cone and the crowd's lens cone down, compare with current voice coil motor, external adjustable lens of lens group, double shooting module isotructure, the total height of module is low, and the volume is taken up an percentage is little, has reduced the equipment cooperation degree of difficulty, utilizes the demand that realizes the miniaturization and the complete machine lightweight of module. In addition, compared with the structure of the voice coil motor, the problem that the magnetic interference failure risk of the voice coil Ma Dajiang is high can be avoided. In addition, the adjustable lens of the embodiment of the application is electrically-operated and focused, and in the focusing process, a mechanical structure is not needed for driving, so that the focusing speed is high, and the power consumption is low.

In some embodiments, the connection circuit is embedded in the wall of the lower lens barrel. The connection circuit is formed by an insert injection molding process. And when the body of the lower group lens barrel is molded, the connecting circuit and the lower group lens barrel are synchronously assembled, so that the production is convenient, and the production efficiency is improved. In addition, because the connecting circuit is embedded in the cylinder wall of the lower group lens cone and is protected by the cylinder wall of the lower group lens cone, static in air can not influence the connecting circuit, so that the failure of the driving circuit and the adjustable lens can be avoided, and the reliability and the stability of the camera module are improved. In this case, only two power-on lines are needed to be respectively electrically connected with the positive electrode and the negative electrode of the adjustable lens, and no additional element for protecting against electrostatic breakdown is needed to be prepared.

In some embodiments, the connection circuitry is formed on the outer surface of the lower barrel by a laser direct structuring technique. And (3) directly plating metal conductive score lines (e.g. gold wires) on the outer surface of the lower group lens barrel by utilizing a laser etching technology.

In some embodiments, the connection circuit includes a first conductive scribe line and a second conductive scribe line that are disposed at intervals and are insulated from each other, opposite ends of the first conductive scribe line are respectively electrically connected to the driving circuit and the positive electrode of the adjustable lens, and opposite ends of the second conductive scribe line are respectively electrically connected to the driving circuit and the negative electrode of the adjustable lens. Thus, the driving circuit can supply electric energy (such as linear voltage) to the adjustable lens through the first conductive scribing line and the second conductive scribing line respectively, so that the adjustable lens generates the change of optical power.

In some embodiments, the projections of the first conductive scribe line and the second conductive scribe line on the circuit board are each in a straight line segment. That is, the first conductive scribe line and the second conductive scribe line are distributed in a linear line. Therefore, the first conductive scribing line and the second conductive scribing line have no meandering and complex line groove distribution, so that the laser forming of the LDS process can be simply and efficiently performed, the working voltage of the connecting circuit is stable, the metal conductive scribing line can be rapidly and automatically produced, and the overall production efficiency is improved. In addition, as the first conductive scribing lines and the second conductive scribing lines are distributed in a linear type, compared with the arrangement of the zigzag wires, the phenomenon of messy wires can be avoided, and the conductive layout is more reasonable and efficient.

In some embodiments, the camera module further includes an anti-Static Discharge (ESD) protection device to prevent external Static electricity from damaging the tunable lens. The anti-static component comprises a grounding element which is electrically connected with the adjustable lens.

In some embodiments, the grounding element includes a ground wire formed on an outer surface of the lower lens barrel by a laser direct structuring technology, and the ground wire is electrically connected to the adjustable lens and the driving circuit. Wherein, the ground wire can be formed in any one of the front, rear, left and right directions of the lower group barrel.

In some embodiments, the projection of the ground wire on the circuit board is a straight line segment. That is, the ground wires are distributed in a linear circuit mode, so that metal conductive scribing lines are produced rapidly and automatically, the overall production efficiency is improved, the phenomenon of messy wires is avoided, and the conductive layout is more reasonable and efficient.

In some embodiments, the grounding element includes a capacitor, one end of which is grounded, and the other end of which is electrically connected to the adjustable lens and the driving circuit. Specifically, one end of the capacitor is connected with the circuit board to realize grounding treatment, and the other end of the capacitor is electrically connected with the adjustable lens. The capacitor and the driving circuit are designed in parallel.

In some embodiments, the antistatic component includes an insulating gel that covers the connection circuitry. The insulating glue can be selected from any one or combination of low-viscosity transparent glue, low-viscosity fluorescent Ultraviolet (UV) curing glue or high-viscosity blue glue. Transparent insulating glue is convenient for produce line inspection, improves production efficiency, and protection electrostatic breakdown effect is showing, can promote the module reliability of making a video recording.

In some embodiments, the camera module further includes a base formed on the circuit board by a molding process, the base encloses the driving circuit, the base includes a light hole for allowing light to be incident on the image sensor, and the lower lens barrel is mounted on the base.

In some embodiments, where the connection circuit includes a first conductive scribe line and a second conductive scribe line, the base includes a first recess and a second recess, each having a conductive material disposed therein; one end of the first conductive scribing line is in direct contact with the conductive material in the first groove and is electrically connected to the driving circuit through the conductive material in the first groove; one end of the second conductive scribing line is in direct contact with the conductive material in the second groove and is electrically connected to the driving circuit through the conductive material in the second groove. The conductive material is, for example, conductive silver paste, but not limited thereto. Thus, the driving circuit provides electric energy (such as linear voltage) to the adjustable lens through the conductive materials in the first groove and the second groove, the first conductive scribing line and the second conductive scribing line, so that the adjustable lens generates focal power change.

In some embodiments, when the grounding element includes a ground wire, the base includes a third groove, and a conductive material is disposed in the third groove, and one end of the ground wire is directly contacted with the conductive material in the third groove and is electrically connected to the circuit board through the conductive material in the third groove. The circuit board is provided with a grounding welding pad, and the ground wire is electrically connected to the grounding welding pad through the conductive material in the third groove so as to realize grounding treatment.

In some embodiments, the camera module further includes an optical filter mounted on a side of the base away from the circuit board and located between the adjustable lens and the image sensor. Further, the optical filter is located between the lower group barrel and the image sensor. The optical filter is used for reducing red light or infrared rays from entering the image sensor, inhibiting stray light and improving imaging quality.

In some embodiments, the adjustable lens includes a transparent supporting layer, a transparent deforming layer and a piezoelectric layer, which are sequentially stacked, and the piezoelectric layer is used for deforming the deforming layer after being electrified, so as to change the curvature radius of the optical curved surface of the adjustable lens. Because the adjustable lens is electrically focused, and in the focusing process, the adjustable lens does not need to be driven by a mechanical structure, and has high focusing speed and low power consumption.

In some embodiments, the camera module further includes a non-adjustable lens (also referred to as a conventional lens, or a non-adjustable lens) disposed between the upper lens barrel and the lower lens barrel; the non-adjustable lens is positioned on one side of the adjustable lens, which is close to the circuit board; alternatively, the non-adjustable lens is located on a side of the adjustable lens away from the circuit board. The non-adjustable lens and the adjustable lens act together to achieve convergence or divergence of light. The number of non-adjustable lenses may be one or more. When the number of non-adjustable lenses is plural, the adjustable lens may be the lens closest to the image sensor, the lens furthest from the image sensor, or be located between two non-adjustable lenses.

A second aspect of the present application provides an electronic device, which includes the camera module set described in the first aspect. The electronic device is, for example, a mobile phone, a notebook computer, an automobile, a household robot, etc., so as to realize quick automatic focusing and low-power focusing. In addition, the camera module is not limited to the front side or the back side of the electronic device.

Drawings

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

Fig. 2 is an exploded view of the camera module of fig. 1.

FIG. 3 is a schematic diagram of the adjustable lens of FIG. 2 electrically connected to the connection circuit.

Fig. 4 is a schematic structural view of the tunable lens of fig. 2.

Fig. 5 is a schematic circuit diagram of the antistatic component in the case of being a ground line according to an embodiment of the present application.

Fig. 6 is a schematic circuit diagram of the antistatic component in the case of a capacitor according to an embodiment of the present application.

Fig. 7 is a schematic circuit diagram of a driving circuit connected to a ground capacitor according to an embodiment of the present application.

Fig. 8 is a simulation graph of the distribution of the contact discharge electric field when the camera module does not include the ground line and does not include the capacitor.

Fig. 9 is a graph of simulation contrast of the distribution of the contact discharge electric field of the camera module on the premise that the antistatic component does not include a capacitor, including a ground line and not including the ground line.

Fig. 10 is a graph of simulation contrast of the distribution of the contact discharge electric field of the camera module when the anti-static assembly includes and includes no capacitor on the premise that the anti-static assembly does not include a ground wire.

Fig. 11 is a graph of simulation contrast of the distribution of the contact discharge electric field of the camera module when the anti-static assembly includes and does not include a capacitor on the premise that the anti-static assembly includes a ground wire.

Fig. 12 is a table of parameters of the capacitances involved when compared in the simulations of fig. 10 and 11.

Fig. 13 is a schematic diagram of a connection circuit in a barrel wall of a lower lens barrel according to another embodiment of the present disclosure.

Description of main reference numerals:

camera module 100

Circuit board 10

Drive circuit 20

Image sensor 30

Base 40

First groove 41

Second groove 42

Third groove 43

Body portion 44

Bearing portion 45

Light-passing hole 46

Optical filter 50

Lower group barrel 61

Connection portion 611

Bearing portion 612

Accommodating groove 6121

Upper group lens barrel 62

Connection circuit 70

First conductive scribe line 71

Second conductive scribe line 72

Third conductive scribe line 73

Ground wire 74

Adjustable lens 80

Support layer 81

Piezoelectric layer 82

Glass sheet 83

First energizing member 841

Second pass-through member 842

First conductive member 851

Second conductive member 852

Non-adjustable lens 90

Capacitance C1, C2

Detailed Description

In order to achieve the above objective, a first aspect of the embodiments of the present application provides a camera module, which aims to solve the technical problems that in the prior art, an adjustable lens is external and is not subjected to electrostatic protection measures or is ineffective, so that the rapid focusing and the anti-electrostatic interference capability are poor, and synchronously realize the prepositioning of the adjustable lens module to meet the requirement of reducing the thickness of a mobile terminal component; the method realizes the aim of clear near focus and far focus in video live broadcast/self-timer application, realizes miniaturization and low power consumption, and builds Vlog competitiveness.

A second aspect of the embodiments of the present application further provides an electronic device, which includes the camera module of the first aspect. The electronic device is a mobile phone, for example. In addition, the camera module can be applied to notebook computers, automobiles, household robots and the like, and quick automatic focusing and low-power-consumption focusing are realized. Because in the above-mentioned camera module, adjustable lens is located between upper group's lens cone and the lower group's lens cone, and the total height of camera module is lower, is convenient for place inside the electron device. In addition, the camera module can be used on the front and back of the electronic device.

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

Fig. 1 is a schematic structural diagram of an image capturing module according to an embodiment of the present application. As shown in fig. 1, the image capturing module 100 includes a circuit board 10, a base 40 disposed on the circuit board 10, a lower lens barrel 61 disposed on a side of the base 40 away from the circuit board 10, and an upper lens barrel 62 disposed on a side of the lower lens barrel 61 away from the circuit board 10.

The lower group barrel 61 includes a connection portion 611 and a carrying portion 612 for carrying lenses (such as adjustable lenses and/or non-adjustable lenses hereinafter). The connection portion 611 and the bearing portion 612 are connected to each other and may be integrally formed. The connection portion 611 is substantially rectangular and is fixedly connected with the base 40. The outer contour of the carrier 612 is generally a circular boss. The bearing portion 612 is fixedly connected with the upper lens barrel 62.

The first conductive scribe line 71, the second conductive scribe line 72 and the third conductive scribe line 73 are disposed on the outer surface of the lower lens barrel 61 at intervals, and each of the first conductive scribe line 71, the second conductive scribe line 72 and the third conductive scribe line 73 extends from the outer surface of the carrying portion 612 to the connection portion 611 and the base 40.

The chassis 40 has a portion extending beyond the lower group barrel 61, and on this portion, the chassis 40 includes first, second, and

third grooves

41, 42, and 43 provided corresponding to the first, second, and third

conductive scribe lines

71, 72, and 73, respectively. The first groove 41, the second groove 42 and the third groove 43 penetrate through two opposite surfaces of the base 40, and each expose a surface of the circuit board 10.

Fig. 2 is an exploded view of the camera module of fig. 1. As shown in fig. 2, the image capturing module 100 includes the image sensor 30 and the driving circuit 20 disposed on the circuit board 10 at intervals, the optical filter 50 between the lower group barrel 61 and the image sensor 30, and the adjustable lens 80 between the upper group barrel 62 and the lower group barrel 61. The bearing portion 612 of the lower barrel 61 includes a receiving groove 6121 recessed toward the connecting portion 611. The accommodating groove 6121 is used for accommodating the adjustable lens 80.

The circuit board 10 may be a flexible circuit board, a rigid circuit board or a flexible-rigid combination board. The image sensor 30 is a Device that converts an optical signal into an electrical signal, for example, a Charge-coupled Device (CCD) or a complementary metal oxide semiconductor (Complementary Metal-Oxide Semiconductor, CMOS) photo-sensitive chip. The image sensor 30 is electrically connected to the circuit board 10, for example, by wires. In addition, other electronic components (not shown) may be mounted on the circuit board 10. Examples of the electronic component include a resistor, a capacitor, a diode, a transistor, a potentiometer, a relay, and a driver. The driving circuit 20 is, for example, a driver IC (driver integrated chip). Further, the circuit board 10 may further connect the camera module 100 to a motherboard of the electronic device, for example, electrically connect the image sensor 30 and the adjustable lens 80 to the motherboard of the electronic device, so that the camera module 100 communicates with the motherboard of the electronic device. For example, the image sensor 30 images under control of the main board, and the adjustable lens 80 focuses under control of the main board.

In some embodiments, the base 40 is formed on the circuit board 10 via a molding process. The base 40 encloses the driving circuit 20, and the base 40 includes a light-passing hole 46 for allowing light to be incident on the image sensor 30. The lower group barrel 61 and the upper group barrel 62 are located at a side of the image sensor 30 remote from the circuit board 10. The lower group barrel 61 is mounted on the base 40.

Specifically, the mount 40 includes a main body portion 44 having a substantially rectangular annular shape and a bearing portion 45 extending inward from the main body portion 44 (inward extension may be understood as extending toward the optical center of the camera module 100). The main body 44 is fixedly connected with the lower barrel 61, and one side edge of the main body 44 has a portion extending beyond the lower barrel 61. The first groove 41, the second groove 42, and the third groove 43 are formed on the main body portion 44, and penetrate through opposite surfaces of the main body portion 44. The bearing portion 45 is also substantially rectangular and annular. The light-transmitting hole 46 is formed in the base 40 at a position corresponding to the image sensor 30, and is substantially rectangular. An L-shaped step is formed at the junction of the body portion 44 and the bearing portion 45.

The filter 50 is used to reduce the entry of red light or infrared light into the image sensor 30, suppress stray light, and improve imaging quality. The filter 50 has a substantially rectangular shape, and the filter 50 is mounted on an L-shaped step of the base 40. The filter 50 is located between the tunable lens 80 and the image sensor 30. Further, the filter 50 is located between the lower group barrel 61 and the image sensor 30. The arrangement of the L-shaped steps facilitates the rapid assembly of the optical filter 50 and the base 40. In addition, the side wall of the step can also limit the optical filter 50, so that the accuracy of the relative position of the optical filter 50 and the image sensor 30 is ensured.

The adjustable lens 80 is configured to deform upon energization to adjust the focal length. The adjustable lens 80 is disposed between the upper lens barrel 62 and the lower lens barrel 61 and is accommodated in the accommodating groove 6121 of the lower lens barrel 61. The adjustable lens 80 and the lower lens barrel 61 are fixed in a gluing mode or a jogging mode, so that the assembly and imaging stability of the adjustable lens 80 can be conveniently realized. Because the adjustable lens 80 is located between the upper lens barrel 62 and the lower lens barrel 61 in the camera module 100, the overall height of the camera module 100 can be reduced, the volume can be saved, and the camera module can be conveniently placed in the electronic device. In addition, compared with the focusing mode of the voice coil motor, the camera module 100 can also reduce the structural complexity, the assembly difficulty and the compactness, and is beneficial to realizing the miniaturization design of the module. Moreover, the problem of high risk of failure of the magnetic interference of the voice coil Ma Dajiang can be avoided. In addition, compared with an externally arranged adjustable lens of the lens group, the lens has the advantages of low total height of the camera module and compact structure. Compared with the double-camera module, the camera module has the advantages of low total height and compact structure. In addition, the adjustable lens 80 is electrically focusing, and in the focusing process, no mechanical structure is needed for driving, so that the focusing speed is high, and the power consumption is low.

As shown in fig. 3, the lower lens barrel 61 is provided with a connection circuit 70, and the adjustable lens 80 is electrically connected to the driving circuit 20 through the connection circuit 70, so as to deform under the driving of the driving circuit 20, thereby adjusting the optical power of the image capturing module 100.

Fig. 4 is a schematic structural view of the tunable lens of fig. 2. As shown in fig. 4, the tunable lens 80 includes a support layer 81, a piezoelectric layer 82, and a glass sheet 83, which are laminated in this order.

The support layer 81 is generally rectangular and is transparent and is made of, for example, glass to function as a support for the various layers of film (e.g., the piezoelectric layer 82 and the glass sheet 83) located thereon. The piezoelectric layer 82 is generally circular and is capable of deforming when energized, such as a piezoelectric polymer or a piezoelectric ceramic. The glass sheet 83 is generally circular in shape and is positioned over the piezoelectric layer 82. The piezoelectric layer 82 is partially covered with the glass sheet 83 and partially exposed from the hole formed in the inner circle of the glass sheet 83.

The tunable lens 80 includes first and second power-on

members

841 and 842 spaced apart at two corners of the tunable lens 80. One end portion of the first electrical member 841 covers the glass sheet 83 and is electrically connected to the piezoelectric layer 82 (or, alternatively, to the negative electrode of the tunable lens 80) through a via (not shown) penetrating the glass sheet 83. The other end of the first electrical component 841 extends to cover the supporting layer 81 for electrical connection with the driving circuit 20. Similarly, one end portion of the second electrical member 842 covers the glass sheet 83 and is electrically connected to the piezoelectric layer 82 (or alternatively, the positive electrode of the tunable lens 80) through a via (not shown) penetrating the glass sheet 83. The other end of the second conductive member 842 extends to cover the supporting layer 81 for electrically connecting with the driving circuit 20.

The tunable lens 80 further includes a transparent deformable layer (not shown) between the support layer 81 and the piezoelectric layer 82. The material of the deformation layer is a high molecular polymer, such as gel. The driving circuit 20 can apply a voltage to the piezoelectric layer 82 through the first electrical member 841 and the second electrical member 842, and after the piezoelectric layer 82 is energized, the piezoelectric layer 82 deforms (e.g., changes from a flat surface to a spherical curved surface) due to the piezoelectric effect, and drives the deformation layer to deform, thereby changing the curvature radius of the optical curved surface of the adjustable lens 80.

Referring to fig. 1 and 2 in combination, after the light is transmitted to the adjustable lens 80 through the upper lens barrel 62, the adjustable lens 80 changes the converging path or the diverging path of the light through the change of the curvature radius to adjust the focal power, and the focused light passing through the adjustable lens 80 is transmitted to the image sensor 30 through the optical filter 50 for imaging.

In fig. 4, the supporting layer 81 may be transparent glass, and when the piezoelectric layer 82 is energized, the surface of the deformation layer near the supporting layer 81 may not be deformed due to the restriction of the supporting layer 81. In other words, the curvature of the surface of the deformation layer that is bonded to the support layer 81 is not changed, so that the deformation amount of the deformation layer concentrates on the surface of the deformation layer that is away from the support layer 81. That is, the expansion and contraction of the piezoelectric layer 82 drives the surface of the deformation layer far away from the support layer 81 to be convex or concave, so that the light is converged or diverged, and the adjustable lens 80 is equivalent to a convex lens or a concave lens, thereby achieving the focusing function.

Further, the radius of curvature of the optical curved surface after the deformation of the tunable lens 80 is positively correlated with the absolute value of the voltage applied to the tunable lens 80. That is, the amount of deformation of the tunable lens 80 is proportional to the magnitude of the voltage applied to the piezoelectric layer 82. In some embodiments, as the voltage applied to the piezoelectric layer 82 is gradually increased from 0, 10V, 20V, 30V, 40V, 50V, etc., the optical curved surface of the tunable lens 80 gradually protrudes upward from the plane toward the side away from the supporting layer 81, and the radius of curvature of the optical curved surface of the tunable lens 80 gradually becomes larger. As the voltage applied to the piezoelectric layer 82 becomes gradually smaller from 0, -10V, -20V, -30V, -40V, -50V, etc., the optical curved surface of the tunable lens 80 becomes gradually concave from the plane toward the side close to the support layer 81, and the radius of curvature of the optical curved surface of the tunable lens 80 becomes gradually larger. In this way, the magnitude and direction of the voltage applied to the adjustable lens 80 can be adjusted, the curvature radius of the deformed optical curved surface of the adjustable lens 80 can be adjusted, and then the focal power of the camera module 100 can be adjusted, so that the purposes of quick automatic zooming and low-power focusing can be achieved, and the far focus and/or near focus imaging of the camera module with the built-in adjustable lens can be clear.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried by the method for applying voltage to an adjustable lens and adjusting optical power described above may be performed by a program that instructs associated hardware to perform, and that the program may be stored on a computer readable storage medium that when executed comprises one or a combination of the steps of the method embodiments.

Referring to fig. 1 to 4, the adjustable lens 80 can be electrically connected to the driving circuit 20 on the circuit board 10 through the first electrical component 841 and the second electrical component 842 and the connection circuit 70 on the lower lens barrel 61.

In some embodiments, the connection circuitry 70 is formed directly on the outer surface of the lower barrel 61 by Laser-direct-structuring (LDS) technology. The connection circuit 70 includes a first conductive scribe line 71 and a second conductive scribe line 72. The first conductive scribe line 71 and the second conductive scribe line 72 may be formed by directly plating metal conductive scribe lines (e.g., gold wires) on the outer surface of the lower barrel 61 using a laser etching technique. The opposite ends of the first conductive scribe line 71 are respectively electrically connected to the driving circuit 20 and the tunable lens 80, and the opposite ends of the second conductive scribe line 72 are also respectively electrically connected to the driving circuit 20 and the tunable lens 80. The drive circuit 20 provides power to the tunable lens 80 through the first and second

conductive score lines

71 and 72.

The driving circuit 20 includes, for example, a positive electrode pad (not shown) and a negative electrode pad (not shown). Conductive material (not shown) is disposed in both the first recess 41 and the second recess 42 of the base 40. The conductive material is, for example, conductive silver paste, but not limited thereto. The conductive material in the first groove 41 is located on the circuit board 10 and is electrically connected to the positive electrode pad of the driving circuit 20. The conductive material in the second recess 42 is located on the circuit board 10 and is electrically connected to the negative electrode pad of the driving circuit 20.

Referring to fig. 3 and 4 in combination, the camera module 100 includes a first conductive member 851 and a second conductive member 852. One end of the first conductive member 851 and one end of the second conductive member 852 are electrically connected to the negative electrode and the positive electrode of the adjustable lens 80 through the first conductive member 841 and the second conductive member 842, respectively. The other end of the first conductive member 851 and the other end of the second conductive member 852 are electrically connected to the first conductive scribe line 71 and the second conductive scribe line 72, respectively.

After one end of the first conductive scribe line 71 is connected to the first conductive member 851, the first conductive scribe line extends along the outer surface of the lower lens barrel 61 to directly contact with the conductive material in the first groove 41, and is electrically connected to the positive electrode pad of the driving circuit 20 through the conductive material in the first groove 41. Similarly, after one end of the second conductive scribe line 72 is connected to the second conductive member 852, the second conductive scribe line extends along the outer surface of the lower lens barrel 61 to directly contact with the conductive material in the second groove 42, and is electrically connected to the negative electrode pad of the driving circuit 20 through the conductive material in the second groove 42. In this manner, the driving circuit 20 on the circuit board 10 can provide electric energy (such as applying a linear voltage) to the tunable lens 80 through the conductive materials in the first groove 41 and the second groove 42, the first conductive scribe line 71 and the second conductive scribe line 72, the first conductive member 851 and the second conductive member 852, and the first conductive member 841 and the second conductive member 842, so that the tunable lens 80 generates a change in optical power.

In some embodiments, the first conductive member 851 and the second conductive member 852 may be copper wires or conductive cloths, etc. The copper wire or the conductive cloth is a conductive wire which is convenient to acquire, and has the advantages of being convenient to assemble and reducing the material cost.

In some embodiments, the first conductive scribe line 71 and the second conductive scribe line 72 are in a linear line distribution. That is, the projections of the first conductive scribe line 71 and the second conductive scribe line 72 on the circuit board 10 each have a straight line segment. Thus, the first conductive scribe line 71 and the second conductive scribe line 72 have no meandering and complex line groove distribution, so that the laser forming of the LDS process can be simply and efficiently performed, the working voltage of the connection circuit 70 is stable, the metal conductive scribe line can be automatically produced rapidly, and the overall production efficiency is improved. Moreover, since the first conductive scribe lines 71 and the second conductive scribe lines 72 are distributed in a linear line, the conductive layout is more reasonable and efficient than the zigzag wire arrangement, and the wire disorder phenomenon can be avoided.

It should be noted that, the current camera module sets the adjustable lens outside the lens barrel without electrostatic protection measures; or ineffective safeguards, resulting in rapid focusing and poor anti-static interference capabilities. In the embodiment of the present application, when the connection circuit is formed on the outer surface of the lower lens barrel, the electrostatic protection design of the camera module is described in detail below.

Specifically, the camera module 100 includes an anti-Static Discharge (ESD) protection device to prevent external Static electricity from damaging the tunable lens 80 and other components.

In some embodiments, the anti-static assembly includes a grounding element electrically connected to the tunable lens 80, the grounding element including a ground wire. Fig. 5 is a schematic circuit diagram of the antistatic component in the case of being a ground line according to an embodiment of the present application. As shown in fig. 5, the ground wire is electrically connected to the tunable lens and the circuit board, so that external static electricity is discharged through the ground wire.

Referring again to fig. 3, a third conductive scribe line 73 is located between the first conductive scribe line 71 and the second conductive scribe line 72, which may be formed on the outer surface of the lower lens barrel 61 by LDS technology. The third conductive scribe line 73 is the ground line 74. That is, the ground wire 74 may also be formed by directly plating a conductive scribe line (e.g., gold wire) on the outer surface of the lower barrel 61 using a laser etching technique. A conductive material (e.g., conductive silver paste) is disposed in the third recess 43 of the base 40 corresponding to the ground wire 74. After one end of the ground wire 74 is electrically connected to the adjustable lens 80, the ground wire extends along the outer surface of the lower lens barrel 61 to be in direct contact with the conductive material in the third groove 43, and is electrically connected to the circuit board 10 through the conductive material in the third groove 43. The circuit board 10 is provided with a ground pad (not shown), and the ground wire 74 is electrically connected to the ground pad through the conductive material in the third groove 43, so as to implement a grounding process.

In some embodiments, the third conductive scribe line 73 (i.e., the ground line 74) is a linear line distribution. That is, the projection of the third conductive scribe line 73 on the circuit board 10 is a straight line segment. Therefore, the arrangement of the ground wire has no meandering and complex line slot distribution, so that the laser forming of the LDS process can be simply and efficiently performed, the working voltage of the connecting circuit is stable, the metal conductive scribing can be rapidly and automatically produced, and the overall production efficiency is improved. In addition, as the third conductive score line serving as the ground wire is distributed in a linear line, compared with the arrangement of the zigzag conductive wires, the phenomenon of messy conductive wires can be avoided, and the conductive layout is more reasonable and efficient.

In fig. 3, the first conductive scribe line 71, the second conductive scribe line 72, and the third conductive scribe line 73 are formed on the same side of the lower barrel 61 (in front of the lower barrel 61 in fig. 3), and the first groove 41, the second groove 42, and the third groove 43 are formed on the same side of the base 40 (in front of the base 40 in fig. 3). In other embodiments, the first conductive scribe line and the second conductive scribe line used as the positive and negative electrode power lines of the tunable lens and the third conductive scribe line used as the ground line may be formed in any one of the front, back, left and right directions of the lower lens barrel. For example, the first and second conductive scribe lines are located in one of the front, rear, left, and right directions of the lower barrel, and the third conductive scribe line, which is a ground line, is located in a different direction from the first and second conductive scribe lines among the front, rear, left, and right directions of the lower barrel. Correspondingly, the first groove, the second groove and the third groove are formed in directions of the base corresponding to the first conductive scribing line, the second conductive scribing line and the third conductive scribing line respectively. Or the first conductive score line, the second conductive score line and the third conductive score line are respectively positioned in the front, the back, the left and the right different directions of the lower group lens barrel. Or, the first conductive scribe line, the second conductive scribe line, and the third conductive scribe line are formed in the same direction of the lower lens barrel, and the positive and negative electrode power-on line used as the adjustable lens is any two of the first conductive scribe line, the second conductive scribe line, and the third conductive scribe line, and the power-on line used as the ground line is the other one of the first conductive scribe line, the second conductive scribe line, and the third conductive scribe line.

In some embodiments, the grounding element electrically connected to the tunable lens 80 of the anti-static assembly includes a capacitor connected to ground. Fig. 6 is a schematic circuit diagram of the antistatic component with a grounded capacitor according to an embodiment of the present application. As shown in fig. 6, one end of the grounding capacitor C1 is connected to the circuit board to implement grounding treatment, and the other end is electrically connected to the adjustable lens. Similarly, one end of the grounding capacitor C2 is connected with the circuit board to realize grounding treatment, and the other end is electrically connected with the adjustable lens. The grounding capacitor C1 and the grounding capacitor C2 are both connected in parallel with the driving circuit. Specifically, the grounding capacitor C1 is electrically connected between the driving circuit and the conductive material in the first groove. The grounding capacitor C2 is electrically connected between the driving circuit and the conductive material in the second groove.

Fig. 7 is a schematic circuit diagram of a driving circuit connected to a grounded capacitor according to an embodiment of the present application. In fig. 7, driver IC is a driving circuit, and Load is an adjustable lens. In fig. 7, the circuit board is omitted. The Driver IC includes a plurality of input interfaces and a plurality of output interfaces. The input interfaces include, but are not limited to, a device power supply voltage interface VDD, a ground interface GND, a Serial Data Line (SDA) interface, and a Serial clock Line (Derail Clock Line, SCL) interface. The output interfaces include, but are not limited to, OUTP and OUTN.

Fig. 8 is a simulation graph of the distribution of the contact discharge electric field when the camera module does not include the ground line and does not include the capacitor. The peak-to-peak value of the static electricity (in fig. 8, the peak-to-peak value of the static electricity is the maximum value of the difference between the peak 6.4226831V and the trough-16.935492V) is about 23.3V, which is a risk of electrostatic breakdown, as obtained by the contact discharge.

Fig. 9 is a graph of simulation contrast of the distribution of the contact discharge electric field of the camera module on the premise that the antistatic component does not include a capacitor, including a ground line and not including the ground line. As shown in fig. 9, when the ground line was applied, a part of energy was significantly discharged from the upper side, and the simulation result showed that the electrostatic peak-to-peak value (in fig. 9, the electrostatic peak-to-peak value is the maximum value of the difference between the peak 4.4442305V and the trough-11.962517V) after the ground line was applied was about 16.3V, which was 30% lower than that before the ground line was not applied.

Fig. 10 is a graph of simulation contrast of the distribution of the contact discharge electric field of the camera module when the anti-static assembly includes and includes no capacitor on the premise that the anti-static assembly does not include a ground wire. Fig. 11 is a graph of simulation contrast of the distribution of the contact discharge electric field of the camera module when the anti-static assembly includes and does not include a capacitor on the premise that the anti-static assembly includes a ground wire. Fig. 12 is a table of parameters of the capacitances involved when compared in the simulations of fig. 10 and 11. As shown in FIG. 12, the capacitance of the capacitor was 0.10. Mu.F, i.e., 100nF. In other embodiments, the specific parameter values of the capacitance to ground are not limited to those shown in fig. 12. As shown in fig. 10, the electrostatic size was significantly reduced by adding only 100nF capacitance without adding ground. Similarly, as shown in fig. 11, the static electricity is obviously reduced by adding 100nF capacitance on the premise of adding the ground wire, and the static electricity is greatly improved by adding no ground wire after adding the capacitance.

In some embodiments, the antistatic component includes an insulating paste (not shown) covering the connection circuit. The insulating glue covers the surfaces of the first conductive scribing line, the second conductive scribing line and the third conductive scribing line so as to prevent electrostatic breakdown. Specifically, the insulating glue can be selected from any one of low-viscosity transparent glue, low-viscosity fluorescent Ultraviolet (UV) curing glue or high-viscosity blue glue or a combination thereof. The insulating adhesive prevents static electricity of air from entering the conductive circuits (such as the first conductive scribing line, the second conductive scribing line and the third conductive scribing line), so that static breakdown failure of the driving circuit and the adjustable lens is avoided. Transparent insulating glue is convenient for produce line inspection, improves production efficiency, and protection electrostatic breakdown effect is showing, can promote the module reliability of making a video recording.

In some embodiments, the antistatic component may include any one of a ground wire, a grounded capacitor, and an insulating adhesive; or the combination of any two of the ground wire, the grounded capacitor and the insulating glue; or the ground wire, the grounded capacitor and the insulating glue. That is, the antistatic component can be designed by arranging a conductive scribing line and a circuit board in any direction of front, back, left and right on the outer surface of the side wall of the lower group lens barrel. Alternatively, the antistatic component may be a capacitor grounded connected to the positive and negative electrodes of the driving circuit to protect the driving circuit and the tunable lens from electrostatic breakdown. Or, the antistatic component can be coated with insulating glue on the connecting circuit so as to prevent static electricity from entering the connecting circuit to achieve the static breakdown effect of the protection driving circuit and the adjustable lens, and the antistatic component is convenient for the practical mass production operability and improves the reliability of the small-head camera module.

In other embodiments, as shown in fig. 13, the connection circuit 70 electrically connected to the adjustable lens 80 is embedded in the wall of the lower lens barrel 61. The connection circuit 70 is formed through an insert molding process. The assembly of the connection circuit 70 and the lower lens barrel 61 is synchronously completed when the body of the lower lens barrel 61 is formed, so that the production is facilitated, and the production efficiency is improved. In addition, since the connection circuit 70 is embedded in the wall of the lower lens barrel 61 and is protected by the wall of the lower lens barrel 61, static electricity in air does not affect the connection circuit 70, so that the failure of the driving circuit 20 and the adjustable lens 80 can be avoided, and the reliability and stability of the camera module can be improved. In this case, only two power-on lines are needed to be respectively electrically connected with the positive electrode and the negative electrode of the adjustable lens, and no additional element for protecting against electrostatic breakdown is needed to be prepared.

As shown in fig. 13, a non-adjustable lens 90 (also called a conventional lens, or a non-adjustable lens) is also housed in the lower group barrel 61. The non-adjustable lens 90 and the adjustable lens 80 cooperate to achieve convergence or divergence of light.

The number of non-adjustable lenses 90 may be one or more. The up and down positions of the non-adjustable lens 90 and the adjustable lens 80 are not limited. For example, the number of non-adjustable lenses 90 is one, and the adjustable lenses 80 are located above or below the non-adjustable lenses 90. Alternatively, as shown in fig. 13 (a), the number of non-adjustable lenses 90 is plural, and the adjustable lens 80 may be the lens closest to the image sensor; or as shown in fig. 13 (b), (c) and (d), the number of non-adjustable lenses 90 is plural, and the adjustable lens 80 is located between two non-adjustable lenses 90; as shown in fig. 13 (e), the number of non-adjustable lenses 90 is plural, and the adjustable lens 80 is the lens farthest from the image sensor.

It should be noted that, when the connecting line is located on the outer surface of the lower lens barrel, the image capturing module may also include an unadjustable lens, and the unadjustable lens is also accommodated in the lower lens barrel. The number of non-adjustable lenses may be one or more. The upper and lower positions of the non-adjustable lens and the adjustable lens are not limited.

In sum, the camera module of this application embodiment, adjustable lens are built-in to focus between last crowd's lens cone and the crowd's lens cone down, compare with the camera module that current voice coil motor, the external adjustable lens of lens group, two modules etc. focus, the module total height is low, and the volume is taken up in a percentage of is little, has reduced the equipment cooperation degree of difficulty, utilizes the demand that realizes the miniaturization and the complete machine lightweight of module. In addition, compared with the structure of the voice coil motor, the problem that the magnetic interference failure risk of the voice coil Ma Dajiang is high can be avoided. In addition, the adjustable lens of the embodiment of the application is electrically-operated and focused, and in the focusing process, a mechanical structure is not needed for driving, so that the focusing speed is high, and the power consumption is low.

In some embodiments, the connection circuit of the adjustable lens is directly formed on the outer surface of the lower lens barrel through an LDS technology and is in linear line distribution, so that the connection circuit of the adjustable lens is not in meandering and complex line groove distribution, the laser forming of the LDS technology is ensured to be carried out simply and efficiently, the working voltage of the connection circuit is stable, metal conductive scribing lines can be produced rapidly and automatically, and the overall production efficiency is improved. Moreover, as the connecting circuits of the adjustable lenses are distributed in a linear circuit, compared with the arrangement of the zigzag wires, the phenomenon of messy wires can be avoided, and the conductive layout is more reasonable and efficient. Further, under the condition that the connection circuit of the adjustable lens is directly formed on the outer surface of the lower lens barrel through an LDS technology, the camera shooting module can further comprise an antistatic component, wherein the antistatic component can comprise any one or more than two of a ground wire, a grounded capacitor and an insulating adhesive, so that the electrostatic breakdown driving circuit and the adjustable lens are protected. Moreover, the ground wire can be directly formed on the outer surface of the lower group lens cone by an LDS technology, and is distributed in a linear type circuit, so that the metal conductive scribing line is rapidly and automatically produced, the overall production efficiency is improved, the phenomenon of wire disorder is avoided, and the conductive layout is more reasonable and efficient.

In other embodiments, the connection circuit of the adjustable lens is embedded in the wall of the lower lens barrel. The connection circuit is formed by an insert injection molding process. And when the body of the lower group lens barrel is molded, the connecting circuit and the lower group lens barrel are synchronously assembled, so that the production is convenient, and the production efficiency is improved. In addition, because the connecting circuit is embedded in the cylinder wall of the lower group lens cone and is protected by the cylinder wall of the lower group lens cone, static in air can not influence the connecting circuit, so that the failure of the driving circuit and the adjustable lens can be avoided, and the reliability and the stability of the camera module are improved. In this case, only two power-on lines are needed to be respectively electrically connected with the positive electrode and the negative electrode of the adjustable lens, and no additional element for protecting against electrostatic breakdown is needed to be prepared.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A camera module, comprising:

a circuit board;

The image sensor and the driving circuit are positioned on the circuit board;

the connecting circuit is positioned on the lower group lens cone; and

the adjustable lens is arranged between the upper group lens barrel and the lower group lens barrel, and is electrically connected to the driving circuit through the connecting circuit, so that the adjustable lens is deformed under the driving of the driving circuit, and the focal power of the camera module is adjusted.

2. The camera module of claim 1, wherein the connection circuit is embedded in a wall of the lower barrel.

3. The camera module of claim 1, wherein the connection circuit is formed on an outer surface of the lower barrel by a laser direct structuring technique.

4. The camera module of claim 3, wherein the connection circuit comprises a first conductive scribe line and a second conductive scribe line which are arranged at intervals and are insulated from each other, opposite ends of the first conductive scribe line are respectively electrically connected with the driving circuit and the positive electrode of the adjustable lens, and opposite ends of the second conductive scribe line are respectively electrically connected with the driving circuit and the negative electrode of the adjustable lens.

5. The camera module of claim 4, wherein the projections of the first conductive scribe line and the second conductive scribe line on the circuit board each have a straight line segment.

6. The camera module of any of claims 3-5, further comprising an anti-static assembly comprising a grounding element electrically connected to the adjustable lens.

7. The camera module of claim 6, wherein the grounding element comprises a ground wire formed on the outer surface of the lower lens barrel by a laser direct structuring technique, the ground wire electrically connecting the adjustable lens and the driving circuit.

8. The camera module of claim 7, wherein the projection of the ground wire onto the circuit board is a straight line segment.

9. The camera module of any of claims 6 to 8, wherein the grounding element comprises a capacitor, one end of the capacitor is grounded, and the other end of the capacitor is electrically connected to the adjustable lens and the driving circuit.

10. The camera module of any one of claims 6 to 9, wherein the antistatic component comprises an insulating glue that covers the connection circuit.

11. The image capturing module of any of claims 1-10, further comprising a base formed on the circuit board via a molding process, the base encasing the drive circuit, the base including a light-passing hole for light to be incident on the image sensor, the lower barrel being mounted on the base.

12. The camera module of claim 11, wherein, in the case where the connection circuit includes a first conductive scribe line and a second conductive scribe line, the base includes a first groove and a second groove, and conductive materials are disposed in the first groove and the second groove; one end of the first conductive scribing line is in direct contact with the conductive material in the first groove and is electrically connected to the driving circuit through the conductive material in the first groove; one end of the second conductive scribing line is in direct contact with the conductive material in the second groove and is electrically connected to the driving circuit through the conductive material in the second groove.

13. The camera module according to claim 11 or 12, wherein, in the case that the ground element includes a ground wire, the base includes a third groove, a conductive material is disposed in the third groove, and one end of the ground wire is in direct contact with the conductive material in the third groove and is electrically connected to the circuit board through the conductive material in the third groove.

14. The camera module of any one of claims 11 to 13, further comprising a filter mounted on a side of the chassis remote from the circuit board and positioned between the adjustable lens and the image sensor.

15. The camera module according to any one of claims 1 to 14, wherein the adjustable lens comprises a transparent support layer, a transparent deformation layer and a piezoelectric layer which are sequentially stacked, and the piezoelectric layer is used for deforming the deformation layer after being electrified, so as to change the curvature radius of the optical curved surface of the adjustable lens.

16. The camera module of any one of claims 1 to 15, further comprising a non-adjustable lens interposed between the upper and lower lens barrels; the non-adjustable lens is positioned on one side of the adjustable lens, which is close to the circuit board; alternatively, the non-adjustable lens is located on a side of the adjustable lens away from the circuit board.

17. An electronic device comprising a camera module according to any one of claims 1 to 16.