CN114257731A

CN114257731A - Camera module, electronic equipment, camera module control method and device

Info

Publication number: CN114257731A
Application number: CN202011019551.4A
Authority: CN
Inventors: 李慧
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2022-03-29

Abstract

The disclosure relates to a camera module, an electronic device, a camera module control method and a camera module control device. The damping force acting on the damping piece can be used for overcoming the shaking force received by the damping piece, and the damping piece is fixedly connected with the camera main body, so that the camera main body obtains an anti-shaking effect. Because the magnetic field that acts on magnetorheological suspensions and the fluid performance of magnetorheological suspensions are fast, the accuracy is high to the response speed of shake, therefore not only can high-efficient promotion camera module anti-shake effect, can also solve the shooting problem of camera module under the high frequency shake.

Description

Camera module, electronic equipment, camera module control method and device

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a camera module, an electronic device, and a camera module control method and apparatus.

Background

The camera module is widely applied to electronic equipment such as a mobile phone, and in the process of taking pictures and taking pictures by utilizing the camera module, the anti-shake effect directly influences the quality of the taken images, the operation experience, the shooting time, the shooting success rate and the like.

In the related art, there are various anti-shake techniques for a camera module, but the image stabilization processing is basically performed for low-frequency shake. However, when the camera module is located in a vehicle running at a high speed such as an airplane, an automobile, a subway, or in other special scenes, high-frequency shake may be generated, and the anti-shake technology based on low-frequency shake cannot improve the shooting problem caused by the high-frequency shake.

Disclosure of Invention

The disclosure provides a camera module, an electronic device, a camera module control method and a camera module control device, so as to improve the anti-shake effect of the camera module.

According to a first aspect of the present disclosure, a camera module is provided, which includes a camera body and an anti-shake device;

the anti-shake device comprises a shell, magnetorheological fluid, an electromagnetic coil and a damping piece; the shell encloses a containing space, the magnetorheological fluid is contained in the containing space, and at least one part of the damping piece is immersed in the magnetorheological fluid;

when the electromagnetic coil is electrified, an adjustable magnetic field is formed to act on the accommodating space so as to change the damping force of the magnetorheological fluid acting on the damping piece;

the damping piece and the camera main body are fixedly connected.

Optionally, the electromagnetic coil is disposed on the damper, and at least a portion of the electromagnetic coil is immersed in the magnetorheological fluid.

Optionally, the electromagnetic coil is disposed on the housing.

Optionally, a gap is formed between the liquid level of the magnetorheological fluid and the side wall of the top of the accommodating space.

Optionally, the anti-shake device further includes a magnetic member, the magnetic member is disposed in the accommodating space, and an auxiliary magnetic field formed by the magnetic member and an adjustable magnetic field formed when the electromagnetic coil is energized are matched with each other to act on the accommodating space.

Optionally, the anti-shake device further comprises a transmission connecting piece; the damping piece is arranged in the accommodating space, an opening is formed in the shell, and the transmission connecting piece is connected with the damping piece through the opening; the opening part is provided with a sealing piece which is respectively matched with the opening and the transmission connecting piece in a sealing way.

Optionally, a cross-sectional dimension of the drive link member in a direction perpendicular to the opening is smaller than a cross-sectional dimension of the damping member.

Optionally, the camera body includes a lens, a motor, an image processing module and a bracket; the lens, the motor and the image processing module are fixedly assembled on the bracket, and the bracket is fixedly connected with the damping piece.

Optionally, the camera body and the anti-shake device are arranged side by side; the support includes the main part and follows the kink that the main part extended formation, the main part sets up camera lens, motor and image processing module below, the kink with damping piece fixed connection.

Optionally, the camera module includes at least two anti-shake devices, and the at least two anti-shake devices are disposed on two opposite sides of the camera body.

According to a second aspect of the present disclosure, an electronic device is provided, where the electronic device includes a device body and any one of the camera modules of the first aspect, and a housing of the anti-shake apparatus is fixedly connected to the device body; the equipment main body comprises a main board and a space attitude sensor, wherein the main board is electrically connected with the space attitude sensor and the electromagnetic coil respectively.

According to a third aspect of the present disclosure, a camera module control method is provided, which is applied to any camera module of the first aspect or any electronic device of the second aspect; the method comprises the following steps:

acquiring jitter information of the camera module; wherein the jitter information comprises at least one of frequency, magnitude and direction of jitter generated by the camera module;

and adjusting the current value in the electromagnetic coil according to the jitter information so that the magnetorheological fluid generates a damping force for overcoming the jitter when an adjustable magnetic field formed by the electromagnetic coil acts on the magnetorheological fluid.

Optionally, the anti-shake device further includes a magnetic member disposed in the accommodating space; adjusting a current value in the electromagnetic coil according to the jitter information includes:

determining a target magnetic field required by the magnetorheological fluid to overcome the damping force of the shake according to the shake information;

determining an adjustable magnetic field formed by the electromagnetic coil according to the target magnetic field, so that the adjustable magnetic field is superposed with an auxiliary magnetic field formed by the magnetic piece to obtain the target magnetic field;

and adjusting the current value of the electromagnetic coil according to the adjustable magnetic field.

Optionally, determining an adjustable magnetic field formed by the electromagnetic coil according to the target magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field is superimposed on an auxiliary magnetic field formed by the magnetic member, including:

determining an adjustable magnetic field formed by the electromagnetic coil according to the target magnetic field and the auxiliary magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field and the auxiliary magnetic field are superposed; wherein the auxiliary magnetic field is a constant magnetic field;

or, determining the auxiliary magnetic field and the required adjustable magnetic field formed by the electromagnetic coil according to the target magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field and the auxiliary magnetic field are superposed; wherein the auxiliary magnetic field is a variable magnetic field.

According to a fourth aspect of the present disclosure, a camera module control device is provided, which is applied to any camera module of the first aspect or any electronic device of the second aspect; the device comprises:

the acquiring unit acquires the jitter information of the camera module; the shake information comprises the size and direction of shake generated by the camera module;

and the control unit is used for adjusting the current value in the electromagnetic coil according to the jitter information so that the magnetorheological fluid generates a damping force for overcoming the jitter when an adjustable magnetic field formed by the electromagnetic coil acts on the magnetorheological fluid.

the determining subunit is used for determining a target magnetic field required by the magnetorheological fluid to overcome the damping force of the shake according to the shake information;

the operation subunit determines an adjustable magnetic field formed by the electromagnetic coil according to the target magnetic field, so that the adjustable magnetic field is superposed with an auxiliary magnetic field formed by the magnetic piece to obtain the target magnetic field;

and the control subunit adjusts the current value of the electromagnetic coil according to the adjustable magnetic field.

Optionally, the operation subunit includes:

the first operation module is used for determining an adjustable magnetic field formed by the electromagnetic coil according to the target magnetic field and the auxiliary magnetic field so as to obtain the target magnetic field after the adjustable magnetic field and the auxiliary magnetic field are superposed; wherein the auxiliary magnetic field is a constant magnetic field;

or, the second operation module determines the auxiliary magnetic field and the adjustable magnetic field formed by the electromagnetic coil according to the target magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field and the auxiliary magnetic field are superposed; wherein the auxiliary magnetic field is a variable magnetic field.

According to a fifth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement: the method for controlling any camera module in the third aspect.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the anti-shake device comprises the magnetorheological fluid and the damping piece at least one part of which enters the magnetorheological fluid, and when the magnetic field acting on the magnetorheological fluid changes, the property of the magnetorheological fluid changes to cause the damping force of the magnetorheological fluid acting on the damping piece to change. The damping force acting on the damping piece can be used for overcoming the shaking force applied to the damping piece, so that the damping piece is prevented from shaking along with the camera module, and the space posture of the damping piece is kept stable. And damping piece and camera main part fixed connection for the camera main part obtains the anti-shake effect. Because the magnetic field that acts on magnetorheological suspensions and the fluid performance of magnetorheological suspensions are fast, the accuracy is high to the response speed of shake, therefore not only can high-efficient promotion camera module anti-shake effect, can also solve the shooting problem of camera module under the high frequency shake.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic cross-sectional view illustrating a camera module according to an exemplary embodiment of the disclosure;

fig. 2 is one of schematic cross-sectional structural diagrams of an anti-shake apparatus in an exemplary embodiment of the disclosure;

fig. 3 is a second schematic cross-sectional view illustrating an anti-shake apparatus according to an exemplary embodiment of the disclosure;

fig. 4 is a third schematic cross-sectional view illustrating an anti-shake apparatus according to an exemplary embodiment of the disclosure;

fig. 5 is a fourth schematic cross-sectional view of an anti-shake apparatus according to an exemplary embodiment of the disclosure;

fig. 6 is a fifth schematic cross-sectional view illustrating an anti-shake apparatus according to an exemplary embodiment of the disclosure;

fig. 7 is a second schematic cross-sectional view illustrating a camera module according to an exemplary embodiment of the disclosure;

fig. 8 is a third schematic cross-sectional view illustrating a camera module according to an exemplary embodiment of the present disclosure;

fig. 9 is a fourth schematic cross-sectional view illustrating a camera module according to an exemplary embodiment of the disclosure;

FIG. 10 is a schematic cross-sectional view of an electronic device in an exemplary embodiment of the disclosure;

fig. 11 is one of flowcharts of a camera module control method according to an exemplary embodiment of the disclosure;

fig. 12 is a second flowchart of a camera module control method according to an exemplary embodiment of the disclosure;

fig. 13 is one of the block diagrams of the structure of a camera module control device in an exemplary embodiment of the present disclosure;

fig. 14 is a second block diagram of a structure of a camera module control device in an exemplary embodiment of the disclosure;

fig. 15 is a block diagram illustrating an apparatus for camera module control according to an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The utility model provides a camera module, camera module include camera main part and anti-shake device. The anti-shake device comprises a shell, magnetorheological fluid, an electromagnetic coil and a damping piece, wherein the shell is enclosed to form an accommodating space, the magnetorheological fluid is accommodated in the accommodating space, and at least one part of the damping piece is immersed in the magnetorheological fluid. When the electromagnetic coil is electrified, an adjustable magnetic field is formed to act on the accommodating space so as to change the damping force of the magnetorheological fluid acting on the damping part. The damping piece is fixedly connected with the camera main body.

It should be noted that the electromagnetic coil may be disposed inside the housing and/or outside the housing, and the present disclosure does not limit the disposed position of the electromagnetic coil.

The damping force acting on the damping piece can be used for overcoming the shaking force applied to the damping piece, so that the damping piece is prevented from shaking along with the camera module, and the space posture of the damping piece is kept stable. And damping piece and camera main part fixed connection for the camera main part obtains the anti-shake effect. Because the magnetic field that acts on magnetorheological suspensions and the fluid performance of magnetorheological suspensions are fast, the accuracy is high to the response speed of shake, therefore not only can high-efficient promotion camera module anti-shake effect, can also solve the shooting problem of camera module under the high frequency shake. In addition, the performance of the magnetorheological fluid is changed to obtain stepless adjustment of the damping force, so that the response accuracy of the damping force to the shaking can be improved. And the magnetorheological fluid can be controlled by an adjustable magnetic field formed by the low-power low-current electromagnetic coil, so that the power consumption of the camera module can be reduced.

Magnetorheological fluids (MRFs) are special non-colloidal suspensions formed by dispersing micron-sized magnetically active particles in an insulating carrier Fluid, the rheological properties of which change with the change of an applied magnetic field. In the absence of a magnetic field, the magnetorheological fluid is a newtonian fluid; when a strong magnetic field exists, the suspended particles are induced to be polarized, particle chains are formed through interaction, interaction is carried out in a short time, and the shear yield stress is increased along with the increase of the magnetic field. When the current input into the electromagnetic coil is larger, the adjustable magnetic field formed by the electromagnetic coil is stronger, the magnetorheological fluid is stronger to be solidified, and the damping force acting on the damping rod is larger. Because the spatial attitude of the camera module under the high-frequency shaking changes fast, and the performance based on the magnetorheological fluid makes the magnetorheological fluid change the performance fast to the shaking of the camera module, so as to provide the damping force for overcoming the shaking for the damping piece, and the problem of shooting of the camera module under the high-frequency shaking is helped to be solved.

It should be noted that the magnetorheological fluid generally consists of ferromagnetic easily-magnetized particles, mother liquor oil and a stabilizer, and the three substances are uniformly mixed according to a certain proportion to form the magnetorheological fluid. The ferromagnetic solid particles which can be used as the magnetorheological fluid are carbonyl iron powder, pure iron powder or iron alloy with higher magnetization saturation strength. The mother liquid oil of the magnetorheological fluid is generally non-magnetic oil with good performance, such as mineral oil, silicone oil, synthetic oil and the like. Stabilizers are used to slow or prevent the generation of magnetic particle sedimentation, e.g., silica gel formed from ultra-fine quartz powder is a typical stabilizer.

Fig. 1 is a schematic structural diagram of a camera module in an exemplary embodiment of the present disclosure. In the embodiment shown in fig. 1, the camera module 1 includes a camera main body 11 and an anti-shake device 12. The anti-shake device 12 includes a casing 121, a magnetorheological fluid 122, an electromagnetic coil 123, and a damping member 124, the casing 121 encloses an accommodating space 1211, the magnetorheological fluid 122 is accommodated in the accommodating space 1211, and at least a part of the damping member 124 is immersed in the magnetorheological fluid 122. An electromagnetic coil 123 is disposed on the damper 124, at least a portion of the electromagnetic coil 123 being immersed in the magnetorheological fluid 122. When the electromagnetic coil 123 is energized, an adjustable magnetic field is formed to act on the accommodating space 1211 to change the damping force of the magnetorheological fluid 122 acting on the damping member 124, and the damping member 124 is fixedly connected with the camera main body 11.

In the above embodiment, at least a part of the damper 124 is immersed in the magnetorheological fluid 122, and the damping effect on the damper 124 is formed by the friction force generated between either side surface of the damper 124 immersed in the magnetorheological fluid 122 and the magnetorheological fluid 122. The damping member 124 may have a block structure, a rod structure, an irregular shape, and the like, which are not limited in this disclosure. In addition, the damping member 124 may be made of a non-magnetic material, such as metal or nonmetal, so as to prevent the damping member 124 from interfering with the magnetic field acting on the accommodating space 1211.

The arrangement of the electromagnetic coil 123 on the damper 124 improves the convenience of arrangement of the electromagnetic coil 123, and optimizes the structural arrangement of the anti-shake apparatus 12. For example, the damper 124 may be a rod-like structure, and the electromagnetic coil 123 may be wound around one end of the rod-like structure to be immersed in the magnetorheological fluid 122 with the damper 124. When the camera module 1 shakes, the control current is introduced into the electromagnetic coil 123, and an adjustable magnetic field generated by the control current in the electromagnetic coil 123 can directly act on the magnetorheological fluid 122, so that the magnetorheological fluid 122 has performance change of a preset degree, and generates a corresponding damping force. The damping force acting on the damping member 124 can be used for overcoming the shaking force applied to the damping member 124, so that the damping member 124 is prevented from shaking along with the camera module 1, and the spatial posture of the damping member 124 is kept stable. And damping piece 124 and camera main part 11 fixed connection for camera main part 11 obtains the anti-shake effect.

The material of the housing 121 may be a metal or a non-metal non-magnetic-resistant material, so as to prevent the material of the housing 121 from interfering with the magnetic field acting on the accommodating space 1211.

The shake generated by the camera module 1 may be low-frequency shake or high-frequency shake. The jitter frequency may be divided according to user settings, for example, a user may set a jitter frequency greater than or equal to a preset value as a high-frequency jitter and a jitter frequency less than the preset value as a low-frequency jitter, which is not limited by the present disclosure. The predetermined range of values may be greater than or equal to 20Hz or other values. Because the magnetic field acting on the magnetorheological fluid 122 and the fluid performance of the magnetorheological fluid 122 are high in response speed and accuracy to shaking, the anti-shaking effect of the camera module 1 can be effectively improved, and the problem of shooting of the camera module 1 under high-frequency shaking can be solved.

In alternative embodiments, the electromagnetic coil 123 may also be disposed on the housing 121, with the electromagnetic coil 123 being located inside the housing 121 and/or outside the housing 121. For example, as shown in fig. 2, the electromagnetic coil 123 may be disposed on the housing 121 and the electromagnetic coil 123 is located inside the housing 121, so that the electromagnetic coil 123 is fixed by the structure inside the housing 121, and the structure of the housing 121 is prevented from blocking or interfering with the magnetic field. Alternatively, for example, as shown in fig. 3, the electromagnetic coil 123 may be disposed on the housing 121 and the electromagnetic coil 123 is located outside the housing 121, so that the electromagnetic coil 123 is fixed by a structure outside the housing 121, and the electromagnetic coil 123 does not occupy and interfere with the structure of the accommodating space 1211. Alternatively, in the embodiment shown in fig. 4, the electromagnetic coil 123 may be disposed on the housing 121 and located inside and outside the housing 121, and the adjustable magnetic field formed by the electromagnetic coil 123 inside and outside the housing 121 acts on the receiving space 1211 to increase the magnetic field strength and the coverage area.

In some alternative embodiments, as shown in fig. 5, a structural member 125 may be further disposed in the receiving space 1211, and the electromagnetic coil 123 is wound around the structural member 125 to form an adjustable magnetic field acting on the receiving space 1211. One or more structural members 125 for arranging the electromagnetic coil 123 are additionally arranged in the accommodating space 1211, so that the arrangement flexibility of the electromagnetic coil 123 can be improved, the magnetic field intensity generated by the electromagnetic coil 123 and the coverage area are more flexible, and the limitation of the fixed structural positions of the shell 121 and the damping member 124 on the adjustable magnetic field intensity and the coverage position generated by the electromagnetic coil 123 when the electromagnetic coil 123 is arranged on the shell 121 and the damping member 124 is avoided.

In some alternative embodiments, as shown in fig. 6, the anti-shake apparatus 12 may further include a magnetic member 126, the magnetic member 126 is disposed in the accommodating space 1211, and an auxiliary magnetic field formed by the magnetic member 126 cooperates with an adjustable magnetic field formed when the electromagnetic coil 123 is energized to act on the accommodating space 1211. The auxiliary magnetic field formed by the magnetic member 126 is matched with the adjustable magnetic field formed by the electromagnetic coil 123, which not only can increase the magnetic field coverage area acting on the accommodating space 1211, but also can help to increase the magnetic field intensity acting on the accommodating space 1211, so that the structural cost and the control cost of the anti-shake device 12 are reduced.

For example, the auxiliary magnetic field formed by the magnetic member 126 may be a constant magnetic field, for example, the magnetic member 126 may be a permanent magnet disposed in the accommodating space 1211 to form the constant magnetic field by the permanent magnet. In this way, the auxiliary magnetic field formed by the magnetic member 126 and the adjustable magnetic field formed when the electromagnetic coil 123 is energized in the anti-shake apparatus 12 are mutually matched and superposed to obtain the target magnetic field, so as to increase the magnetic field coverage area acting on the accommodating space 1211 and increase the magnetic field intensity acting on the accommodating space 1211. Here, since the auxiliary magnetic field is a constant magnetic field, the magnitude of the adjustable magnetic field in any direction can be determined by the difference between the target magnetic field and the auxiliary magnetic field in that direction.

For example, the auxiliary magnetic field formed by the magnetic member 126 may be a variable magnetic field, and for example, the magnetic member 126 may be an electromagnet disposed in the accommodating space 1211 to form a variable magnetic field by the electromagnet. In this way, the auxiliary magnetic field and the desired adjustable magnetic field formed by the electromagnetic coil 123 can be determined according to the desired target magnetic field in the receiving space 1211. Here, since the auxiliary magnetic field is a variable magnetic field, the target magnetic field may be assigned to be obtained by superimposing the auxiliary magnetic field and the adjustable magnetic field. For example, the adjustable magnetic field may be obtained by adjusting the current in the electromagnetic coil 123, and the auxiliary magnetic field may be obtained by adjusting the current in the winding coil on the electromagnet. In this example, the magnetic field formed by the magnetic member 126 (e.g., an electromagnet) is variable, so that the magnetic field can be adjusted according to whether or not and how much auxiliary magnetic field is needed, thereby improving the flexibility and controllability of the anti-shake apparatus.

In some alternative embodiments, a gap 1212 is provided between the liquid level of the magnetorheological fluid 122 and the top sidewall of the accommodating space 1211, and the gap 1212 can provide a buffer space for the change of the fluid property of the magnetorheological fluid 122, so as to avoid the problems of overflow of the magnetorheological fluid 122 after the change of the fluid property and interference with the sidewall of the accommodating space 1211.

In some alternative embodiments, as shown in fig. 7, the anti-shake apparatus 12 may further include a transmission connector 127, the damping member 124 is disposed in the accommodating space 1211, the housing 121 is provided with an opening, the transmission connector 127 is connected to the damping member 124 through the opening, a sealing member 128 is disposed at the opening, and the sealing member 128 is in sealing engagement with the opening and the transmission connector 127, respectively. The damping member 124 is connected with the transmission connecting member 127, and the spatial attitude of the damping member 124 is transmitted to the outside of the housing 121 of the anti-shake device 12, so that the damping member 124 is fixedly connected with the camera module 1. The sealing member 128 disposed at the opening can seal the anti-shake device 12, so as to prevent the magnetorheological fluid 122 from overflowing from the opening, and improve the sealing performance of the anti-shake device 12. Wherein the sealing member 128 may be a sealing sleeve fitted over the transmission connection member 127.

It should be noted that the transmission connecting member 127 may be integrally formed with the damping member 124, or fixedly connected to the damping member 124 by welding, riveting, screwing, clamping, or the like, and the arrangement of the transmission connecting member 127 is not limited in this disclosure. When the transmission link 127 and the damping member 124 are integrally formed, the transmission link 127 and the damping member 124 form an integral structure, and the transmission link 127 is a part of the damping member 124.

In some alternative embodiments, the cross-sectional dimension of drive link 127 is smaller than the cross-sectional dimension of damping member 124 in a direction perpendicular to the opening. The structural arrangement can reduce the size of the opening under the condition of ensuring the sectional dimension of the damping member 124, and is helpful for improving the stress effect of the damping member 124 and the overall sealing performance of the anti-shake device 12.

In some alternative embodiments, as shown in fig. 8, the camera body 11 may include a lens 111, a motor 112, an image processing module 113, and a bracket 114. The lens 111, the motor 112 and the image processing module 113 are fixedly assembled on the bracket 114, and the bracket 114 is fixedly connected with the damping member 124. The structure that enables each part of the camera body 11 to have an imaging function is synchronized with the spatial posture of the bracket 114 through the above structure, and the bracket 114 is fixedly connected with the damping member 124, so that the camera body 11 can be controlled to be anti-shake through the damping member 124. The image processing module 113 may include a filter 1131 disposed below the lens 111, an image sensor 1133, and a circuit board 1134. Filter 1131 may be supported by filter support 1132, and filter 1131, filter support 1132, image sensor 1133, and circuit board 1134 may be sequentially disposed under lens 111.

For example, when the camera module 1 is subjected to high-frequency shake in the direction of the solid arrow shown in fig. 8, a current matched with the high-frequency shake is controlled to be supplied to the electromagnetic coil 123, the electromagnetic coil 123 generates an adjustable magnetic field acting on the accommodating space 1211, the fluid performance of the magnetorheological fluid 122 in the accommodating space 1211 changes, and a damping force overcoming the high-frequency shake is generated, and the damping force acts on the damping member 124, so that the damping member 124 can maintain the original spatial posture. The bracket 114 fixedly connected with the damping member 124, and the lens 111, the motor 112 and the image processing module 113 fixedly arranged on the bracket 114 are controlled by the damping member 124 to maintain the original spatial attitude, thereby realizing high-frequency anti-shake control.

For example, when the camera module 1 is subjected to high-frequency shake indicated by solid arrows and low-frequency shake indicated by broken arrows in fig. 9, low-frequency shake information and high-frequency shake information can be acquired, respectively. Anti-shake processing for high-frequency shake information: the electromagnetic coil 123 is controlled to be supplied with current matched with the high-frequency jitter, the electromagnetic coil 123 generates an adjustable magnetic field acting on the accommodating space 1211, the fluid performance of the magnetorheological fluid 122 in the accommodating space 1211 changes, a damping force for overcoming the high-frequency jitter is generated, and the damping force acts on the damping member 124, so that the damping member 124 can maintain the original space posture. The bracket 114 fixedly connected with the damping member 124, and the lens 111, the motor 112 and the image processing module 113 fixedly arranged on the bracket 114 are controlled by the damping member 124 to maintain the original spatial attitude, thereby realizing high-frequency anti-shake control. Anti-shake processing for low-frequency shake: the motor 112 of the camera main body 11 is controlled to make an anti-shake feedback motion matching with the low-frequency shake to realize the low-frequency anti-shake control. For example, when the camera module 1 receives low-frequency shake information with the shake direction upward, the motor 112 controls the anti-shake feedback movement direction of the lens 111 with the shake direction downward, so as to implement low-frequency anti-shake control.

In an alternative embodiment, as shown in fig. 9, the camera body 11 and the anti-shake device 12 are arranged side by side, the bracket 114 includes a main body portion 1141 and a bending portion 1142 formed by extending from the main body portion 1141, the main body portion 1141 is arranged below the lens 111, the motor 112 and the image processing module 113, and the bending portion 1142 is fixedly connected to the damping member 124. Camera main part 11 sets up side by side with anti-shake device 12 and can reduce camera module 1 and occupy in the ascending space of thickness direction, promotes camera module 1's light thin nature. The bending part 1142 of the bracket 114 realizes the fixed connection between the camera body 11 and the damping part 124 of the anti-shake device 12 arranged side by side, and the structure is simple and convenient to realize.

In an alternative embodiment, the camera module 1 may include at least two anti-shake devices 12, and the at least two anti-shake devices 12 are disposed on two opposite sides of the camera body 11. Utilize two at least anti-shake devices 12 can promote camera module 1's anti-shake effect, the anti-shake device 12 of two at least relative settings can provide anti-shake control in the position of 11 symmetries of camera main part, also can promote camera module 1's anti-shake effect. Alternatively, in other embodiments, the camera module 1 may also include one anti-shake device 12, and the number of anti-shake devices 12 is not limited in this disclosure.

The present disclosure further provides an electronic device 2, as shown in fig. 10, the electronic device 2 may include a device body 21 and the above camera module 1, a housing 121 of the anti-shake apparatus 12 is fixedly connected to the device body 21, the device body 21 includes a main board 22 and a spatial attitude sensor 23, and the main board 22 is electrically connected to the spatial attitude sensor 23 and the electromagnetic coil 123, respectively.

It should be noted that the spatial attitude sensor 23 may be an accelerometer. The electronic device 2 may be a mobile phone, a tablet computer, a medical terminal, a vehicle-mounted terminal, etc., which is not limited by the present disclosure. The following takes the electronic device 2 as a mobile phone as an example to exemplarily explain the anti-shake control process:

when the mobile phone is subjected to high-frequency vibration, the shell 121 of the anti-vibration device 12 of the camera module 1 is fixedly connected with the equipment body 21, the shell 121 of the anti-vibration device 12 synchronously generates high-frequency vibration along with the equipment body 21 of the mobile phone, and the spatial postures of the camera body 11 and the damping piece 124 are kept consistent. The main board 22 senses the shake information of the high-frequency shake through the spatial attitude sensor 23, and supplies a current matched with the shake information to the electromagnetic coil 123 according to the shake information, the electromagnetic coil 123 generates an adjustable magnetic field acting on the accommodating space 1211, the fluid performance of the magnetorheological fluid 122 in the accommodating space 1211 changes, and a damping force overcoming the high-frequency shake is generated, and the damping force acts on the damping member 124, so that the damping member 124 can maintain the original spatial attitude. The camera body 11 fixedly connected with the damping member 124 is controlled by the damping member 124 to maintain the original spatial attitude, thereby realizing high-frequency anti-shake control.

The anti-shake apparatus 12 of the camera module 1 includes a magnetorheological fluid 122 and a damping member 124 at least a part of which enters the magnetorheological fluid 122, and when a magnetic field acting on the magnetorheological fluid 122 changes, the fluid property of the magnetorheological fluid 122 changes to cause the damping force of the magnetorheological fluid 122 acting on the damping member 124 to change. The damping force acting on the damping member 124 can be used for overcoming the shaking force applied to the damping member 124, so that the damping member 124 is prevented from shaking along with the camera module 1, and the spatial posture of the damping member 124 is kept stable. And damping piece 124 and camera main part 11 fixed connection for camera main part 11 obtains the anti-shake effect. Because the magnetic field acting on the magnetorheological fluid 122 and the fluid performance of the magnetorheological fluid 122 are high in response speed and accuracy to shaking, the anti-shaking effect of the camera module 1 can be effectively improved, and the problem of shooting of the camera module 1 under high-frequency shaking can be solved.

The present disclosure further provides a camera module control method, which is applied to the camera module or the electronic device. Fig. 11 is a flowchart of a camera module control method according to an exemplary embodiment of the disclosure. As shown in fig. 11, the camera module control method can be implemented by the following steps:

in step S1101, acquiring shake information of the camera module; the shake information includes at least one of the frequency, the size and the direction of shake generated by the camera module.

In step S1102, a current value in the electromagnetic coil is adjusted according to the jitter information, so that when the adjustable magnetic field formed by the electromagnetic coil acts on the magnetorheological fluid, the magnetorheological fluid generates a damping force to overcome the jitter.

In the above embodiment, the shake generated by the camera module may be low-frequency shake or high-frequency shake. The level of the dithering frequency may be divided according to user settings. For example, the user may set the dithering frequency greater than or equal to the preset value as the high frequency dithering and set the dithering frequency less than the preset value as the low frequency dithering, which is not limited by the present disclosure. The predetermined range of values may be greater than or equal to 20Hz or other values. Because the magnetic field that acts on magnetorheological suspensions and the fluid performance of magnetorheological suspensions are fast, the accuracy is high to the response speed of shake, therefore not only can high-efficient promotion camera module anti-shake effect, can also solve the shooting problem of camera module under the high frequency shake.

For example, when the shake information of the camera module includes high-frequency shake with frequency greater than or equal to a preset value, the current value in the electromagnetic coil is adjusted according to the high-frequency shake information, the electromagnetic coil generates an adjustable magnetic field acting on the accommodating space, the fluid performance of the magnetorheological fluid in the accommodating space is changed, a damping force for overcoming the high-frequency shake is generated, and the damping force acts on the damping piece, so that the damping piece can maintain the original spatial posture. The camera main body fixedly connected with the damping piece is controlled by the damping piece to maintain the original space posture, and then high-frequency anti-shake control is realized.

For another example, when the shake information of the camera module includes low-frequency shake with a frequency less than a preset value, the motor of the camera main body can also be controlled to make anti-shake feedback motion matched with the low-frequency shake, so as to realize low-frequency anti-shake control. For example, when the camera module receives low-frequency shake information with a shake direction upward, the anti-shake feedback movement direction of the motor-controlled lens is downward, so as to realize low-frequency anti-shake control.

In the above embodiment, the anti-shake apparatus may further include a magnetic member disposed in the accommodating space. Fig. 12 is a second flowchart of a camera module control method according to an exemplary embodiment of the disclosure, and as shown in fig. 12, adjusting the current value in the electromagnetic coil according to the jitter information may be implemented by:

in step S1201, a target magnetic field required for the magnetorheological fluid to generate a damping force to overcome the shake is determined according to the shake information.

In step S1202, the adjustable magnetic field formed by the electromagnetic coil is determined according to the target magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field is superimposed on the auxiliary magnetic field formed by the magnetic member.

In step S1203, the current value of the electromagnetic coil is adjusted according to the adjustable magnetic field.

In an embodiment, the auxiliary magnetic field is a constant magnetic field, and the magnetic member may be a permanent magnet disposed in the accommodating space to form the constant magnetic field through the permanent magnet. At this time, the adjustable magnetic field formed by the required electromagnetic coil can be determined according to the target magnetic field and the auxiliary magnetic field, so that the target magnetic field can be obtained after the adjustable magnetic field and the auxiliary magnetic field are superposed. Since the auxiliary magnetic field is a constant magnetic field, the magnitude of the adjustable magnetic field in any direction can be determined by the difference between the target magnetic field and the auxiliary magnetic field in that direction.

In another embodiment, the auxiliary magnetic field is a variable magnetic field, and the magnetic member may be an electromagnet disposed in the accommodating space to form the variable magnetic field by the electromagnet. At this time, the auxiliary magnetic field and the adjustable magnetic field formed by the required electromagnetic coil can be determined according to the target magnetic field, so that the target magnetic field can be obtained after the adjustable magnetic field and the auxiliary magnetic field are superposed. Since the auxiliary magnetic field is a variable magnetic field, the target magnetic field can be distributed to obtain the target magnetic field by superposition of the auxiliary magnetic field and the adjustable magnetic field. The adjustable magnetic field can be obtained by adjusting the current in the electromagnetic coil, and the auxiliary magnetic field can be obtained by adjusting the current in the winding coil on the electromagnet. The formed magnetic field of the electromagnet is variable, so that the auxiliary magnetic field can be adjusted according to the requirement of the auxiliary magnetic field and the required size of the auxiliary magnetic field, and the flexibility and controllability of the anti-shake device are improved.

The auxiliary magnetic field formed by the magnetic part and the adjustable magnetic field formed when the electromagnetic coil is electrified are matched with each other to act on the accommodating space. The auxiliary magnetic field formed by the magnetic piece is matched with the adjustable magnetic field formed by the electromagnetic coil, so that the magnetic field coverage area acting on the accommodating space can be improved, the magnetic field intensity acting on the accommodating space can be increased, and the structural cost and the control cost of the anti-shake device are reduced.

The present disclosure further provides a camera module control device, which is applied to the camera module or the electronic device. Fig. 13 is one of block diagrams of a configuration of a camera module control device in an exemplary embodiment of the present disclosure. As shown in fig. 13, the camera module control device 130 includes: an acquisition unit 131 and a control unit 132. Wherein:

the acquisition unit 131 is configured to acquire shake information of the camera module. The shake information includes at least one of the frequency, the size and the direction of shake generated by the camera module.

The control unit 132 is configured to adjust the current value in the electromagnetic coil according to the jitter information, so that the magnetorheological fluid generates a damping force against the jitter when the adjustable magnetic field formed by the electromagnetic coil acts on the magnetorheological fluid.

For example, when the shake information of the camera module includes high-frequency shake with frequency greater than or equal to a preset value, the current value in the electromagnetic coil is adjusted according to the high-frequency shake information, the electromagnetic coil generates an adjustable magnetic field acting on the accommodating space, the fluid performance of the magnetorheological fluid in the accommodating space is changed, a damping force for overcoming the high-frequency shake is generated, and the damping force acts on the damping piece, so that the damping piece can maintain the original spatial posture. The support fixedly connected with the damping piece, the lens, the motor and the image processing module which are fixedly arranged on the support are controlled by the damping piece to maintain the original space posture, and then high-frequency anti-shake control is realized.

In the above embodiment, the anti-shake apparatus may further include a magnetic member disposed in the accommodating space. Fig. 14 is a second block diagram of a structure of a camera module control device in an exemplary embodiment of the disclosure, and as shown in fig. 14, the control unit 132 may include: a determination subunit 1321, an arithmetic subunit 1322 and a control subunit 1323. Wherein:

the determining subunit 1321 is configured to determine, from the shake information, a target magnetic field required for the magnetorheological fluid to generate a damping force to overcome the shake.

The operation subunit 1322 is configured to determine an adjustable magnetic field formed by the required electromagnetic coil according to the target magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field is superimposed on the auxiliary magnetic field formed by the magnetic member.

The control subunit 1323 is configured to adjust the current value of the electromagnetic coil in accordance with the adjustable magnetic field.

Further, the operation subunit 1322 may further include a first operation module and a second operation module.

In an embodiment, the auxiliary magnetic field is a constant magnetic field, and the magnetic member may be a permanent magnet disposed in the accommodating space to form the constant magnetic field through the permanent magnet. At this time, the first operation module may be configured to determine an adjustable magnetic field formed by the required electromagnetic coil according to the target magnetic field and the auxiliary magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field is superimposed on the auxiliary magnetic field; wherein the auxiliary magnetic field is a constant magnetic field. Since the auxiliary magnetic field is a constant magnetic field, the magnitude of the adjustable magnetic field in any direction can be determined by the difference between the target magnetic field and the auxiliary magnetic field in that direction.

In another embodiment, the auxiliary magnetic field is a variable magnetic field, and the magnetic member may be an electromagnet disposed in the accommodating space to form the variable magnetic field by the electromagnet. At this time, the first operation module may be configured to determine the auxiliary magnetic field and the adjustable magnetic field formed by the required electromagnetic coil according to the target magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field and the auxiliary magnetic field are superimposed; wherein the auxiliary magnetic field is a variable magnetic field. Since the auxiliary magnetic field is a variable magnetic field, the target magnetic field can be distributed to obtain the target magnetic field by the superposition of the auxiliary magnetic field and the adjustable magnetic field. The adjustable magnetic field can be obtained by adjusting the current in the electromagnetic coil, and the auxiliary magnetic field can be obtained by adjusting the current in the winding coil on the electromagnet. The formed magnetic field of the electromagnet is variable, so that the auxiliary magnetic field can be adjusted according to the requirement of the auxiliary magnetic field and the required size of the auxiliary magnetic field, and the flexibility and controllability of the anti-shake device are improved.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed solution. One of ordinary skill in the art can understand and implement it without inventive effort.

Correspondingly, this disclosure still provides a device of camera module control, includes: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to:

and acquiring the jitter information of the camera module. The shake information includes at least one of the frequency, the size and the direction of shake generated by the camera module. And adjusting the current value in the electromagnetic coil according to the jitter information so that the magnetorheological fluid generates a damping force for overcoming jitter when an adjustable magnetic field formed by the electromagnetic coil acts on the magnetorheological fluid.

Accordingly, the present disclosure also provides a terminal comprising a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured for execution by the one or more processors to include instructions for: and acquiring the jitter information of the camera module. The shake information includes at least one of the frequency, the size and the direction of shake generated by the camera module. And adjusting the current value in the electromagnetic coil according to the jitter information so that the magnetorheological fluid generates a damping force for overcoming jitter when an adjustable magnetic field formed by the electromagnetic coil acts on the magnetorheological fluid.

Fig. 15 is a block diagram illustrating an apparatus for camera module control according to an example embodiment. For example, the apparatus 1500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 15, apparatus 1500 may include one or more of the following components: processing components 1502, memory 1504, power components 1506, multimedia components 1508, audio components 1510, input/output (I/O) interfaces 1512, sensor components 1514, and communication components 1516.

The processing component 1502 generally controls overall operation of the device 1500, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 1502 may include one or more processors 1520 executing instructions to perform all or a portion of the steps of the methods described above. Further, processing component 1502 may include one or more modules that facilitate interaction between processing component 1502 and other components. For example, processing component 1502 may include a multimedia module to facilitate interaction between multimedia component 1508 and processing component 1502.

The memory 1504 is configured to store various types of data to support operations at the apparatus 1500. Examples of such data include instructions for any application or method operating on the device 1500, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1504 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power supply component 1506 provides power to the various components of the device 1500. The power components 1506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 1500.

The multimedia component 1508 includes a screen that provides an output interface between the device 1500 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, multimedia component 1508 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 1500 is in an operation mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 1510 is configured to output and/or input audio signals. For example, the audio component 1510 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 1500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 1504 or transmitted via the communication component 1516. In some embodiments, audio component 1510 also includes a speaker for outputting audio signals.

The I/O interface 1512 provides an interface between the processing component 1502 and peripheral interface modules, which can be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 1514 includes one or more sensors for providing status assessment of various aspects of the apparatus 1500. For example, the sensor assembly 1514 can detect an open/closed state of the device 1500, the relative positioning of components, such as a display and keypad of the device 1500, the sensor assembly 1514 can also detect a change in position of the device 1500 or a component of the device 1500, the presence or absence of user contact with the device 1500, orientation or acceleration/deceleration of the device 1500, and a change in temperature of the device 1500. The sensor assembly 1514 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 1514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1514 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 1516 is configured to facilitate wired or wireless communication between the apparatus 1500 and other devices. The apparatus 1500 may access a wireless network based on a communication standard, such as WiFi, 2G or 15G, 4G LTE, 5G NR, or a combination thereof. In an exemplary embodiment, the communication component 1516 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1516 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 1500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

The present disclosure further provides a computer-readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the camera module control method described above. In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 1504 comprising instructions, executable by the processor 1520 of the apparatus 1500 to perform the camera module control method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A camera module is characterized by comprising a camera main body and an anti-shake device;

the damping piece and the camera main body are fixedly connected.

2. The camera module of claim 1, wherein the electromagnetic coil is disposed on the damping member, at least a portion of the electromagnetic coil being immersed in the magnetorheological fluid.

3. The camera module according to claim 1, wherein a gap is provided between the liquid level of the magnetorheological fluid and a top side wall of the accommodating space.

4. The camera module according to claim 1, 2 or 3, wherein the anti-shake device further comprises a magnetic member disposed in the accommodating space, and an auxiliary magnetic field formed by the magnetic member cooperates with the adjustable magnetic field formed when the electromagnetic coil is energized to act on the accommodating space.

5. The camera module of claim 1, wherein the anti-shake apparatus further comprises a transmission link; the damping piece is arranged in the accommodating space, an opening is formed in the shell, and the transmission connecting piece is connected with the damping piece through the opening; the opening part is provided with a sealing piece which is respectively matched with the opening and the transmission connecting piece in a sealing way.

6. The camera module of claim 5, wherein a cross-sectional dimension of the drive connection member in a direction perpendicular to the opening is smaller than a cross-sectional dimension of the damping member.

7. The camera module according to claim 1, wherein the camera body comprises a lens, a motor, an image processing module, and a bracket; the lens, the motor and the image processing module are fixedly assembled on the bracket, and the bracket is fixedly connected with the damping piece.

8. The camera module according to claim 7, wherein the camera body is arranged side by side with the anti-shake device; the support includes the main part and follows the kink that the main part extended formation, the main part sets up camera lens, motor and image processing module below, the kink with damping piece fixed connection.

9. The camera module according to claim 1 or 8, wherein the camera module comprises at least two anti-shake devices, at least two anti-shake devices being disposed on opposite sides of the camera body.

10. An electronic device, comprising a device body and the camera module according to any one of claims 1 to 9, wherein a housing of the anti-shake apparatus is fixedly connected to the device body; the equipment main body comprises a main board and a space attitude sensor, wherein the main board is electrically connected with the space attitude sensor and the electromagnetic coil respectively.

11. A camera module control method, applied to the camera module according to any one of claims 1 to 9 or the electronic device according to claim 10; the method comprises the following steps:

12. The camera module control method according to claim 11, wherein the anti-shake apparatus further comprises a magnetic member disposed in the accommodating space; adjusting a current value in the electromagnetic coil according to the jitter information includes:

13. The camera module control method according to claim 12, wherein determining the adjustable magnetic field required to be formed by the electromagnetic coil according to the target magnetic field, so that the target magnetic field is obtained after the adjustable magnetic field is superimposed on the auxiliary magnetic field formed by the magnetic member, comprises:

14. A camera module control device, characterized by being applied to the camera module according to any one of claims 1-9 or the electronic device according to claim 10; the device comprises:

15. A computer readable storage medium having computer instructions stored thereon which, when executed by a processor, implement: the steps of a camera module control method according to any one of claims 11-13.