CN114827418A - Camera module, electronic equipment and anti-shake control method of camera module - Google Patents
Camera module, electronic equipment and anti-shake control method of camera module Download PDFInfo
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- CN114827418A CN114827418A CN202210459883.7A CN202210459883A CN114827418A CN 114827418 A CN114827418 A CN 114827418A CN 202210459883 A CN202210459883 A CN 202210459883A CN 114827418 A CN114827418 A CN 114827418A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 89
- 230000009471 action Effects 0.000 claims abstract description 27
- 239000011554 ferrofluid Substances 0.000 claims description 18
- 239000012528 membrane Substances 0.000 claims description 7
- 230000000875 corresponding effect Effects 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005426 magnetic field effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6812—Motion detection based on additional sensors, e.g. acceleration sensors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Adjustment Of Camera Lenses (AREA)
- Lens Barrels (AREA)
Abstract
The application discloses camera module, electronic equipment and camera module anti-shake control method. The camera module comprises: a lens assembly; the magnetic fluid film is arranged on one side of the lens assembly; a magnetic member disposed opposite to the magnetic fluid film; under the condition that the lens assembly deviates along the first direction, the magnetofluid film deforms under the action of the magnetic part, and drives the lens assembly to move so as to compensate the deviation of the lens assembly along the first direction.
Description
Technical Field
The application belongs to the technical field of electronic equipment, and particularly relates to a camera module, electronic equipment and a camera module anti-shake control method.
Background
With the popularization of smart phones, the frequency of shooting videos or photos by people through cameras is higher and higher, and the quality requirements on the photos and the videos are also higher and higher. However, if hand shake occurs during shooting, the image quality of the video or photograph is blurred.
Disclosure of Invention
The application aims at providing a camera module, electronic equipment and a camera module anti-shake control method, and the anti-shake function of the camera module is achieved.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a camera module, including: a lens assembly; the magnetic fluid film is arranged on one side of the lens assembly; a magnetic member disposed opposite to the magnetic fluid film; under the condition that the lens assembly deviates along the first direction, the magnetofluid film deforms under the action of the magnetic part, and drives the lens assembly to move so as to compensate the deviation of the lens assembly along the first direction.
According to the camera module provided by the embodiment of the application, under the condition that the lens component deviates along the second direction, the magnetofluid film deforms under the action of the magnetic part, and drives the lens component to move so as to compensate the deviation of the lens component along the second direction; wherein the second direction is perpendicular to the first direction.
According to the camera module that this application embodiment provided, still include: a sensor disposed on the lens assembly, the sensor being configured to detect an offset distance or an offset angle of the lens assembly in the first direction and/or the second direction; the controller, the controller with the sensor with magnetic part electric connection, the controller is based on offset distance or the skew angle adjusts the current value and the current direction of magnetic part, and then adjusts the deformation volume and the deformation direction of magnetic fluid membrane.
According to a camera module that this application embodiment provided, the magnetic fluid film set up in the one side that the lens subassembly deviates from the lens subassembly is followed under the circumstances of first direction skew, the magnetic fluid film drives the lens subassembly along with the opposite direction of first direction removes.
According to the camera module provided by the embodiment of the application, the magnetofluid films comprise a first magnetofluid film and a second magnetofluid film, the first magnetofluid film is arranged on the first side of the lens assembly, and the second magnetofluid film is arranged on the second side of the lens assembly; the magnetic part comprises a first coil and a second coil, the first coil is arranged on the first side of the lens assembly, and the second coil is arranged on the second side of the lens assembly; the first magnetofluid film deforms under the action of the first coil to drive the lens assembly to move along the second direction; the second magnetofluid film deforms under the action of the second coil, and the lens assembly is driven to move in the direction opposite to the second direction.
According to the camera module provided by the embodiment of the application, the camera module further comprises a circuit board, the circuit board and the lens component are overlapped, the magnetic part comprises a first coil, and the first coil is electrically connected with the circuit board; the magnetofluid film comprises a first deformation part, the first deformation part is located on one side of a perpendicular bisector of one side edge of the lens assembly, the first deformation part is opposite to the first coil, and the orthographic projection of the lens assembly or the circuit board on the magnetofluid film is overlapped with the first deformation part.
According to the camera module provided by the embodiment of the application, under the condition that the first coil is electrified with forward current, the first deformation part deforms along the first direction to enable the first deformation part to be close to the surface of the lens component to form a protrusion; under the condition that negative current is introduced into the first coil, the first deformation part deforms along the direction opposite to the first direction, so that the first deformation part is close to the surface of the lens assembly to form a concave part.
According to the camera module provided by the embodiment of the application, the magnetic part comprises a first coil and a second coil; the magnetofluid film comprises a first deformation part and a second deformation part, the first deformation part is opposite to the first coil, the second deformation part is opposite to the second coil, and the first deformation part deforms under the action of the first coil to drive the lens assembly to move along the first direction; the second deformation part deforms under the action of the second coil and drives the lens assembly to move along the second direction, and the second direction is perpendicular to the first direction.
According to the camera module provided by the embodiment of the application, under the condition that the first coil is electrified with forward current, the first deformation part deforms along the first direction to enable the first deformation part to be close to the surface of the lens component to form a protrusion; under the condition that negative current is introduced into the first coil, the first deformation part deforms along the direction opposite to the first direction, so that the first deformation part is close to the surface of the lens assembly to form a concave part; under the condition that forward current is introduced into the second coil, the second deformation part deforms along the second direction to enable the second deformation part to be close to the surface of the lens component to form a protrusion; and under the condition that negative current is introduced into the second coil, the second deformation part deforms along the direction opposite to the second direction, so that the second deformation part is close to the surface of the lens assembly to form a concave part.
According to the camera module that this application embodiment provided, still include the circuit board, the magnetic fluid film with the circuit board is connected and is covered the circuit board.
In a second aspect, an embodiment of the present application provides an electronic device, which includes the camera module described above.
According to the electronic equipment provided by the embodiment of the application, the electronic equipment further comprises a gyroscope, the gyroscope is used for detecting the offset angle of the lens assembly, and the camera module controls the deformation direction and the deformation amount of the magnetic fluid film based on the offset angle; and/or the electronic equipment further comprises a Hall element, the Hall element is used for detecting the offset distance of the lens assembly, and the camera module controls the deformation direction and the deformation quantity of the magnetofluid film based on the offset distance.
In a third aspect, an embodiment of the present application provides a method for controlling camera module anti-shake, including: acquiring the offset distance or the offset angle of the lens assembly in the first direction; and controlling the current value and the current direction of the magnetic part based on the offset distance or the offset angle so as to deform the magnetic fluid film and drive the lens assembly to move so as to compensate the offset of the lens assembly along the first direction.
This application is through setting up magnetic fluid membrane and magnetism spare, and the characteristic that usable magnetic current body takes place to deform under the magnetic field effect when the shake takes place for the lens subassembly, and the magnetic fluid membrane drives the lens subassembly and resumes to initial position, has realized automatic anti-shake. Simultaneously the camera module of this application need not additionally set up cloud platform motor, has reduced the size of camera module, has realized the miniaturized purpose of camera module.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a camera module according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating a position change of a camera module provided by the present application before and after a coil is energized;
FIG. 3 is a schematic diagram of the deformation of the magnetic fluid;
FIG. 4 is a schematic diagram of the deformation of the magnetic fluid film after energization;
FIG. 5 is a schematic view of the arrangement positions of the first coil and the first deformation portion;
FIG. 6 is a graph of the direction of deformation of the magnetic fluid film versus the direction of current flow to the first coil;
fig. 7 is a schematic diagram illustrating the positions of the magnetic fluid film 20 and the magnetic member 30 in an embodiment of the camera module provided in the present application;
fig. 8 is a schematic structural diagram of a camera module according to still another embodiment of the present disclosure;
FIG. 9 is a schematic view of the setup position of the first and second magnetofluid films;
fig. 10 is a schematic diagram illustrating the positions of the magnetic fluid film 20 and the magnetic member 30 in another embodiment of the camera module provided by the present application;
reference numerals:
10: a lens assembly; 11: a lens; 12: a lens barrel; 20: a magnetic fluid film; 21: a first magnetofluid film; 22: a second magnetofluid film; 201: a first deformation section; 202: a second deformation part; 31: a first coil; 32: a second coil; 40: a circuit board.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of those features. In the description of the present application, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The following describes a camera module, an electronic device, and a method for controlling camera module anti-shake according to an embodiment of the present application with reference to fig. 1 to 10.
As shown in fig. 1, in an embodiment of the present application, a camera module includes: lens assembly 10, magnetic fluid film 20, and magnetic member 30. The magnetofluid film 20 is disposed on one side of the lens assembly 10, the magnetic member 30 is disposed opposite to the magnetofluid film 20, and when the lens assembly 10 deviates in the first direction, the magnetofluid film 20 deforms under the action of the magnetic member 30, and drives the lens assembly 10 to move so as to compensate for the deviation of the lens assembly 10 along the first direction.
Specifically, in the present embodiment, the lens assembly 10 is a package, and the magnetic fluid film 20 is disposed below the lens assembly 10. The magnetic member 30 can generate a magnetic field after being electrified, the shape of the magnetic fluid can be deformed under the action of an external magnetic field due to the surface characteristic of the magnetic fluid, the magnetic fluid liquid drop can be stretched along the magnetic field direction under the action of the external magnetic field, and the magnetic fluid can restore the original shape when the magnetic field disappears. As shown in fig. 3 and 4, after the magnetic member 30 is energized, a magnetic induction line perpendicular to the magnetofluid film 20 is generated, and under the action of a magnetic field, the magnetofluid film 20 is deformed, the direction of the deformation of the magnetofluid film 20 is the same as the direction of the magnetic induction line, and the deformed magnetofluid film 20 can drive the lens assembly 10 to move.
For example, during shooting, the lens assembly 10 is shifted in the first direction, and the magnetic fluid film 20 is deformed in the opposite direction to the first direction, so as to move the lens assembly 10 to compensate for the shift in the first direction.
Further, as shown in fig. 2, the magnetic fluid film is disposed under the lens assembly 10, and the magnetic member 30 is disposed at one side edge of the lens assembly 10. Under the condition that the lens assembly 10 is shifted along the first direction as shown in the figure, the magnetofluid film 20 at the edge of the lens assembly 10 is deformed under the magnetic field of the magnetic member 30, so as to drive the lens assembly 10 to move along the direction opposite to the first direction to compensate for the shift of the lens assembly 10 along the first direction.
Specifically, as shown in fig. 2 (a), the lens assembly 10 has a certain offset angle with respect to the horizontal plane, and the magnetic member 30 is not powered. Fig. b is a schematic diagram illustrating the lens assembly 10 being restored to the initial position after the magnetic member 30 is powered on. In order to restore the lens assembly 10 to the initial position, a magnetofluid film 20 may be disposed on the right side of the bottom surface of the lens assembly 10, and after the magnetic member 30 is powered on, the magnetofluid film 20 is deformed downward to drive the right side of the lens assembly 10 to shift downward, so that the lens assembly 10 may be in a horizontal state again.
Further, the magnetic member 30 is a coil. When the current applied to the magnetic member 30 is an alternating current, the deformation direction of the magnetic fluid film 20 is related to the current direction of the magnetic member 30. Taking the example that the magnetic member 30 is disposed on the bottom surface of the magnetic fluid film 20, with reference to fig. 3 and 4, when a forward current is applied, the magnetic member 30 generates an upward magnetic induction line perpendicular to the magnetic fluid film 20, and the deformation direction of the magnetic fluid film 20 is vertical upward; when negative current is applied, the magnetic member 30 generates a downward magnetic induction line perpendicular to the magnetic fluid film 20, and the deformation direction of the magnetic fluid film 20 is vertical downward. That is, in the case of fig. 2 (a), the magnetic member 30 needs to be supplied with a negative current, and the magnetic fluid film 20 generates a downward deformation to drive the right side of the lens assembly 10 to move downward, so that the lens assembly 10 is in a horizontal state again.
Further, the deformation of the magnetic fluid film 20 is related to the magnetic field, that is, the size of the magnetic fluid film 20 can be large or small, as in the case of (a) in fig. 2, the magnetic fluid film 20 can cover the bottom surface of the lens assembly 10, and at this time, if the right side of the lens assembly 10 is desired to be shifted, only the magnetic member 30 needs to be disposed on the right side, so that the magnetic member 30 is opposite to the magnetic fluid film 20, the magnetic fluid film 20 on the right side is deformed, and the magnetic fluid film 20 on the left side is not deformed. Accordingly, the magnetofluid film 20 may be provided only on the right side of the lens assembly 10 and not on the left side.
Further, the amount of deformation of the magnetic fluid film 20 is positively correlated with the magnitude of the current value of the magnetic member 30. After the lens assembly 10 is shifted, the displacement of the lens assembly 10, which is the deformation amount of the magnetofluid film 20, can be obtained according to the shift distance or the shift angle. According to the corresponding relationship between the deformation amount of the ferrofluid film 20 and the current intensity, a corresponding current value can be calculated, and further, the deformation amount of the ferrofluid film 20 can be controlled by controlling the current value input to the magnetic member 30, so that the lens assembly 10 is moved to compensate for the deviation in the first direction.
Further, the magnetic member 30 may be disposed on the housing or other components of the camera module, and only needs to be disposed opposite to the magnetic fluid film 20.
Further, the lens assembly 10 includes a lens 11 and a lens barrel 12. In the present application, the lens assembly 10 is prior art, and therefore the detailed structure thereof will not be described herein. The lens assembly 10 is further provided with a focusing coil and a magnetic member (not shown in the figure), the focusing coil generates a magnetic field after being powered on, and the magnetic member moves under the action of the magnetic field to push the lens 11 and the lens barrel 12 to move, so that automatic focusing is realized.
This application is through setting up magnetic fluid membrane and magnetism spare, and the characteristic that usable magnetic current body takes place to deform under the magnetic field effect when the shake takes place for the lens subassembly, and the magnetic fluid membrane drives the lens subassembly and removes to the skew of compensation lens subassembly has realized automatic anti-shake. Simultaneously the camera module of this application need not additionally set up cloud platform motor, has reduced the size of camera module, has realized the miniaturized purpose of camera module.
Further, the magnetic fluid film 20 is disposed on a side of the lens assembly 10 away from the lens 11, and in a case that the lens assembly 10 is shifted in the first direction, the magnetic fluid film 20 drives the lens assembly 10 to move in a direction opposite to the first direction under the action of the magnetic member 30.
Further, referring to fig. 1 and 5, the camera module further includes a circuit board 40, and the circuit board 40 is stacked on the lens assembly 10. The magnetic member 30 includes a first coil 31. Optionally, the first coil 31 is electrically connected to the circuit board 40. The magnetofluid film 20 includes a first deformation portion 201, and the first deformation portion 201 is located on one side of a perpendicular bisector of one side of the lens assembly 10. The first coil 31 is opposed to the first deformation portion 201. The orthographic projection of the lens assembly 10 or the circuit board 40 on the magnetofluid film 20 is overlapped with the first deformation portion 201.
Specifically, the magnetic fluid film 20 is located below the lens assembly 10 and on the bottom surface of the circuit board 40. The first deformation portion 201 is a portion where the magnetofluid film 20 is deformed. The portion of the ferrofluid film 20 opposite to the first coil 31 is a first deformation 201. As shown in fig. 5, the first coil 31 is opposite to a portion of the magnetofluid film 20, and the portion of the magnetofluid film 20 deformed by the first coil 31 forms a first deformation portion 201. At this time, the first deformation portion 201 overlaps at least a portion of the circuit board 40.
Alternatively, the magnetic fluid film 20 may cover the circuit board 40 entirely, or may cover only a partial area of the circuit board 40. When the magnetic fluid film 20 only includes the first deformation portion 201, the magnetic fluid film 20 deforms the whole region under the action of the first coil 31, and the utilization rate of the magnetic fluid film 20 reaches the maximum. .
Alternatively, as shown in fig. 5, the magnetic fluid film 20 is a rectangular film, and the first deformation portion 201 may be located at any one side of the magnetic fluid film 20. It is understood that when the effective magnetic field range generated by the first coil 31 is large enough, the whole magnetic fluid film 20 can also become the first deformation portion 201.
It will be appreciated that the shape of the magnetic fluid film 20 may also be circular, polygonal, elliptical or other contoured shape.
In some embodiments represented by fig. 2, during the process of moving the lens assembly 10 by deformation of the magnetofluid film 20, only the edge of the lens assembly 10 needs to move to drive the lens assembly 10 to compensate for the shift of the lens assembly 10 along the first direction. The first deformation portion 201 is located on one side of the perpendicular bisector of any side of the lens assembly 10, i.e. the edge of the lens assembly 10.
As shown in fig. 6, the magnetic member 30 includes at least two first coils 31, and the two first coils 31 are respectively disposed at least two sides of the magnetic fluid film 20. The magnetofluid film 20 includes at least two first deformations 201 formed corresponding to the first coil 31. After at least two first coils 31 are powered on, the first deformation portions 201 opposite to the first coils are deformed to compensate for the offset of the lens assembly 10 along the first direction.
Further, under the condition that the first coil 31 is supplied with the positive current, the first deformation portion 201 deforms in the first direction to make the surface of the first deformation portion 201 close to the lens assembly 10 form a protrusion, so as to drive the lens assembly 10 to move in the first direction, and under the condition that the first coil 31 is supplied with the negative current, the first deformation portion 21 deforms in the direction opposite to the first direction, so that the surface of the first deformation portion 201 close to the lens assembly 10 forms a recess, so as to drive the lens assembly 10 to move in the direction opposite to the first direction.
In some embodiments, the camera module can also compensate for the offset of the lens assembly 10 in the second direction. Under the condition that the lens assembly 10 deviates along the second direction, the magnetofluid film 20 deforms under the action of the magnetic member 30, so as to drive the lens assembly 10 to move to compensate for the deviation of the lens assembly 10 along the second direction, wherein the second direction is perpendicular to the first direction.
As shown in fig. 1 and fig. 7, the magnetic fluid film 20 is located on the bottom surface of the lens assembly 10, and the magnetic fluid film 20 includes a first deformation portion 201 and a second deformation portion 202. The first deformation part 201 and the second deformation part 202 are respectively disposed on two adjacent sides of the magnetofluid film 20. The magnetic member 30 includes a first coil 31 and a second coil 32. The first coil 31 is opposed to the first deformation portion 201, and the second coil 32 is opposed to the second deformation portion 202. When the first coil 31 and the second coil 32 are energized, the first deformation portion 202 deforms in the first direction, and drives the lens assembly 10 to move in the first direction; the second deformation portion 202 deforms along a second direction, which is perpendicular to the first direction, and drives the lens assembly 10 to move along the second direction.
Specifically, the magnetic fluid film 20 is rectangular, the first deformation portion 201 is disposed near a first side of the magnetic fluid film 20, and the second deformation portion 202 is disposed near a second side of the magnetic fluid film 20. The first side edge and the second side edge are adjacent and perpendicular. The portion of the magnetofluid film 20 that is deformed by the first coil 31 forms a first deformation portion 201. The portion of the magnetofluid film 20 that deforms under the action of the second coil 32 forms a second deformation portion 202.
Alternatively, the long axis of the first coil 31 extends in the third direction, and the second coil extends in the second direction. The first direction, the second direction and the third direction are vertical to each other. The first side edge extends along the third direction, and the second side edge extends along the second direction, so that the first deformation part 201 extends along the third direction and the second deformation part 202 extends along the second direction.
In some embodiments, the plane of the first coil 31 and/or the second coil 32 is parallel to the plane of the magnetofluid film 20, the first coil 31 is located on one side of the perpendicular bisector of the second side of the lens assembly 10, and the second coil 32 is located on one side of the perpendicular bisector of the first side of the lens assembly 10. The design can ensure that the lens assembly 10 can be driven to move along the first direction by the deformation of the first deformation part 202 along the first direction; and the lens assembly 10 can be moved along the second direction by the deformation of the second deformation portion 202 along the second direction.
Alternatively, when the magnetofluid film 20 is disposed at the bottom of the lens assembly 10, the first direction and the second direction are perpendicular, and the first direction and the second direction are parallel to the plane of the magnetofluid film 20.
The orthographic projection of the first coil 31 on the magnetofluid film 20 has no overlap with the orthographic projection of the lens assembly 10 on the magnetofluid film 20. That is, the first coil 31 and the corresponding first deformation portion 201 are disposed outside the lens assembly 10 to generate a pulling force in the first direction by the local deformation of the ferrofluid film 20, so as to move the lens assembly 10 in the first direction.
Similarly, the orthographic projection of the second coil 32 on the magnetofluid film 20 has no overlap with the orthographic projection of the lens assembly 10 on the magnetofluid film 20. The lens assembly 10 can be moved in the second direction by disposing the second coil 32 and the corresponding second deformation portion 202 outside the lens assembly 10 to generate a pulling force in the second direction by the local deformation of the ferrofluid film 20.
Alternatively, the magnetic fluid film 20 is disposed on the bottom of the circuit board 40. The first and second directions are perpendicular and parallel to the plane of the magnetic fluid film 20.
The orthographic projection of first coil 31 on magnetic fluid film 20 has no overlap with the orthographic projection of circuit board 40 on magnetic fluid film 20. That is, the first coil 31 and the corresponding first deformation portion 201 are disposed outside the circuit board 40 to generate a pulling force in the first direction by local deformation of the ferrofluid film 20, so as to move the circuit board 40 and the lens assembly 10 located above the circuit board 40 in the first direction.
Similarly, the orthographic projection of second coil 32 on magnetic fluid film 20 has no overlap with the orthographic projection of circuit board 40 on magnetic fluid film 20. That is, the second coil 32 and the corresponding second deformation portion 202 are disposed outside the circuit board 40 to generate a pulling force in the second direction by the local deformation of the ferrofluid film 20, thereby moving the circuit board 40 and the lens assembly 10 located above the circuit board 40 in the second direction.
In some embodiments, the plane of the first coil 31 and/or the second coil 32 intersects with the plane of the magnetic fluid film 20 to control the deformation directions of the first deformation portion 201 and the second deformation portion 202, so as to preset the first direction and the second direction as required, thereby realizing the shake compensation of the lens assembly 10 along a specific preset direction.
Alternatively, the first coil 31 is disposed on the side of the magnetic fluid film 20, that is, the first coil 31 is disposed along the thickness direction of the magnetic fluid film 20. Alternatively, the first coil 31 is disposed on the magnetofluid film 20 perpendicular to the side of the circuit board 40. The lens assembly 10 above the magnetofluid film 20 is moved along the first direction by arranging the first coil 31 and the corresponding first deformation portion 201 on the side of the lens assembly 10 to extend or contract the magnetofluid film 20 along the first direction.
Similarly, the second coil 32 is disposed on the other adjacent side of the magnetic fluid film 20, i.e., the second coil 31 is also disposed in the thickness direction of the magnetic fluid film 20. Alternatively, the second coil 32 is also disposed on the magnetofluid film 20 perpendicular to the side of the circuit board 40. The lens assembly 10 above the magnetofluid film 20 is moved in the second direction by arranging the second coil 32 and the corresponding second deformation part 202 on the other adjacent side of the lens assembly 10 to extend or contract the magnetofluid film 20 in the second direction.
It is to be understood that the relative position relationship among the magnetic member, the magnetofluid film and the lens assembly in the present application is not limited to the embodiments listed in the present application, and based on the content of the embodiments in the present application, a person skilled in the art should consider the protection scope of the present application as a simple adjustment of the specific positions and relative angles of the magnetic member, the magnetofluid film and the lens assembly according to the requirement of the anti-shake direction.
In the embodiment shown in fig. 8, the magnetic fluid film 20 is disposed not only on the bottom surface of the lens assembly 10 but also on at least one side surface of the lens assembly 10. The magnetic fluid film 20 disposed on the bottom surface of the lens assembly 10 is deformed by the magnetic member 30 to move the lens assembly 10 along the first direction so as to compensate for the deviation of the lens assembly 10 along the first direction. The magnetic fluid film 20 disposed on the side of the lens assembly 10 deforms under the action of the magnetic member 30 to move the lens assembly 10 in the second direction so as to compensate for the offset of the lens assembly 10 in the second direction.
The magnetic fluid films are arranged on two adjacent surfaces of the lens assembly, so that the lens assembly can move along the first direction and the second direction. Specifically, the lens assembly is driven to move along the first direction and the second direction by the deformation of the magnetofluid film along the first direction and the second direction under the action of the magnetic part, so that the offset of the first direction and the offset of the second direction are compensated.
In the embodiment shown in fig. 9, the magnetofluid film 20 includes a first magnetofluid film 21 and a second magnetofluid film 22, the first magnetofluid film 21 being disposed on a first side of the lens assembly 10, and the second magnetofluid film 22 being disposed on a second side of the lens assembly 10. The magnetic member 30 includes a first coil 31 and a second coil 32, the first coil 31 being disposed at a first side of the lens assembly 10, and the second coil 32 being disposed at a second side of the lens assembly 10. The first magnetofluid film 20 is deformed by the first coil 31 to drive the lens assembly 10 to move along the second direction, and the second magnetofluid film 22 is deformed by the second coil 32 to drive the lens assembly 10 to move along the direction opposite to the second direction.
Specifically, the first and second magnetofluid films 21 and 22 are disposed on opposite sides of the lens assembly 10, i.e., left and right sides of the lens assembly 10. Alternatively, the first and second magnetofluid films 21 and 22 may be disposed on the front and rear sides of the lens assembly 10.
Further, as shown in fig. 10, the magnetic member 30 includes a first coil 31 and a second coil 32, the magnetofluid film 20 includes a first deformation portion 201 and a second deformation portion 202, the first deformation portion 201 is opposite to the first coil 31, and the first deformation portion 201 deforms under the action of the first coil 31 to drive the lens assembly 10 to move along the first direction; the second deformation portion 202 deforms under the action of the second coil 32, and drives the lens assembly 10 to move along a second direction, which is perpendicular to the first direction.
Specifically, the portion of the magnetic fluid film 20 that is deformed by the first coil 31 forms a first deformation portion 201. The portion of the magnetofluid film 20 that deforms under the action of the second coil 32 forms a second deformation portion 202. After the first coil 31 is powered on, the first deformation portion 201 drives the lens assembly 10 to move along the first direction; after the second coil 32 is energized, the second deforming part 202 moves the lens assembly 10 in the second direction.
Further, in this embodiment, the size of the first deformation part 201 may be equal to the size of the magnetofluid film 20, and the size of the second deformation part 202 may be equal to the size of the magnetofluid film 20.
Further, under the condition that the first coil 31 is energized with a forward current, the first deformation portion 201 deforms along the first direction to form a protrusion on the surface of the first deformation portion 201 close to the lens assembly 10, so as to drive the lens assembly 10 to move along the first direction; under the condition that the first coil 31 is energized with a negative current, the first deformation portion 201 deforms in a direction opposite to the first direction, so that the first deformation portion 201 is close to the surface of the lens assembly 10 to form a concave portion, and the lens assembly 10 is driven to move in the direction opposite to the first direction.
Under the condition that the second coil 32 is electrified with forward current, the second deformation part 202 deforms along the second direction, so that the second deformation part 202 forms a bulge close to the surface of the lens component 10, and the lens component 10 is driven to move along the second direction; when a negative current is applied to the second coil 32, the second deformation unit 202 deforms in a direction opposite to the second direction, so that the second deformation unit 202 forms a concave portion near the surface of the lens assembly 10, and the lens assembly 10 is moved in the direction opposite to the second direction.
In the embodiment of the present application, the camera module further includes a sensor, the sensor is disposed inside or outside the lens assembly 10, and is configured to detect a shift distance or a shift angle of the lens assembly 10 in the first direction and/or the second direction, and the magnetic member 30 adjusts a current value and a current direction based on the shift distance or the shift angle, so as to adjust a deformation amount and a deformation direction of the ferrofluid film 20.
Further, the camera module further includes a controller, the controller is electrically connected to the sensor and the magnetic member 30, the sensor sends the detected offset distance or offset angle data of the first direction and/or the second direction to the controller, the controller calculates the displacement of the lens assembly 10 in the three-dimensional coordinate system, then converts the displacement into a corresponding current value, and uses the current value as the input current of the magnetic member 30, thereby controlling the deformation amount and the deformation direction of the ferrofluid film 20.
This application can detect the offset distance or the angle of excursion of lens subassembly through setting up sensor and controller to according to input current value and the current direction of this offset distance or the angle of excursion regulation magnetic part, and then the deformation volume and the deformation direction of control magnetic current membrane, make the lens subassembly can resume to initial condition, realized automatic anti-shake function.
As shown in fig. 1, the camera module further includes a circuit board 40, the magnetic fluid film 20 covers the circuit board 40, and the magnetic fluid film 20 is a liquid film and is always in contact with the circuit board 40 during the focusing process, so that the circuit board 40 can be cooled in real time.
Optionally, the magnetic fluid film 20 completely covers the circuit board 40. The heat dissipation capacity of the ferrofluid film 20 to the circuit board 40 can be increased by the design.
The application also provides an electronic device which comprises the camera module.
In particular, the electronic device may be a cell phone, a tablet, a camera, etc.
According to the electronic equipment, when shaking occurs in the shooting process, the lens assembly can be driven to restore to the initial position by utilizing the deformation of the magnetofluid film, so that the electronic equipment has an anti-shaking function; simultaneously, the electronic equipment that this application provided need not additionally set up cloud platform motor, has realized the miniaturized purpose of camera module.
Further, the electronic device further includes a gyroscope, the gyroscope is disposed on the camera module and used for detecting the offset angle of the camera module, and the controller of the camera module controls the current value and the current direction of the magnetic member 30 according to the offset angle.
Further, the electronic device further includes a hall element, the hall element is used for detecting the offset distance of the lens assembly 10, and the controller of the camera module controls the deformation direction and the deformation amount of the magnetic fluid 20 based on the offset distance.
Further, the electronic device further includes: the device comprises a focusing coil, a focusing magnet, a focusing Hall element, a focusing driver, a photosensitive chip and a processor.
The light sensing chip is disposed on the circuit board 40 for converting the optical signal into an electrical signal and sending the electrical signal to the processor, which converts the electrical signal into image information. The actuator includes a first actuator for supplying current to the focusing magnet 30 of the camera module and a second actuator for supplying current to the focusing coil. After the focusing coil is powered on, a magnetic field is generated in the camera module, and the focusing coil moves under the action of the magnetic field of the focusing magnetic member 30 to push the lens assembly 10 to move along the direction of the optical axis. The focusing Hall element is used for detecting the change of the magnetic field intensity generated by the focusing coil, judging the displacement of the lens assembly 10 according to the change of the magnetic field intensity, feeding the displacement back to the second driver, and the second driver adjusts the current value output to the focusing coil, so that the displacement of the lens assembly 10 is compensated, and automatic focusing is realized.
The application also provides a camera module anti-shake control method, which comprises the following steps:
step 01: acquiring the offset distance or the offset angle of the lens assembly 10 in the first direction;
step 02: the current value and the current direction of the input magnetic member 30 are controlled based on the offset distance or the offset angle, so that the magnetofluid film 20 is deformed in the direction opposite to the first direction, so as to move the lens assembly 10 to compensate for the offset of the lens assembly 10 in the first direction.
Specifically, a sensor may be disposed in the lens assembly 10 for detecting a shift distance or a shift angle of the lens assembly 10 in the first direction when the lens assembly 10 is shifted. And calculating a current value input to the magnetic member 30 according to the offset distance or the offset angle, wherein the current value corresponds to the deformation amount of the magnetofluid film 20, so that the deformation amount of the magnetofluid film 20 is exactly equal to the displacement of the lens assembly 10, and the lens assembly 10 is driven to return to the initial position.
Further, the deformation direction of the magnetic fluid film 20 is related to the current direction of the magnetic member 30, and when the current direction is different, the deformation direction of the magnetic fluid film 20 is opposite.
Further, the anti-shake control method for the camera module further comprises the following steps:
the gyroscope detects the offset angle of the camera module, converts the offset angle into an electric signal and sends the electric signal to the controller, and the controller calculates the displacement of the camera module in the first direction and/or the second direction based on the electric signal and then converts the displacement into a corresponding current value needing to be compensated. The current value is outputted as a current value to the magnetic member 30 by the first driver to control the amount of deformation of the magnetofluid film 20. At the same time, the direction of the first driver output current is controlled based on the direction of the offset to control the direction of deformation of the magnetofluid film 20.
Further, the Hall element detects the offset distance of the camera module in the first direction and/or the second direction in real time and feeds the offset distance back to the controller, and the controller adjusts the input current of the first driver in real time in the deformation process of the magnetic fluid film 20 so as to adjust the deformation amount of the magnetic fluid film 20 in real time and compensate the offset of the camera module in the first direction and/or the second direction in real time.
Further, the anti-shake control method for the camera module further comprises the following steps:
the second driver supplies current to the focusing coil, which generates a magnetic field to move the lens assembly 10 along the optical axis to compensate for the offset of the lens assembly 10. The focusing Hall element detects the magnetic field intensity change in real time, judges the displacement of the lens assembly 10 according to the magnetic field intensity change, and feeds the displacement back to the second driver, and the second driver adjusts the current value output to the focusing coil, so that the displacement of the lens assembly 10 is compensated, and automatic focusing is realized.
It is understood that the first direction and the second direction in the drawings of the present application are only examples and are not intended to limit the present invention, and the specific orientations of the first direction and the second direction are determined by the arrangement position of the magnetic fluid film with respect to the lens assembly 10 and the direction of the magnetic field generated by the corresponding magnetic member 30 and are not specifically limited herein.
The application provides a camera module anti-shake's control method utilizes the magnetic current body to take place the characteristic that deformation under the magnetic field effect, drives the camera lens subassembly and removes to can automatic re-setting under the condition that the camera lens subassembly takes place the skew, realized the anti-shake function of camera module.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. The utility model provides a camera module which characterized in that includes:
a lens assembly;
the magnetic fluid film is arranged on one side of the lens assembly;
a magnetic member disposed opposite to the magnetic fluid film;
under the condition that the lens assembly deviates along the first direction, the magnetofluid film deforms under the action of the magnetic part, and drives the lens assembly to move so as to compensate the deviation of the lens assembly along the first direction.
2. The camera module according to claim 1, wherein when the lens assembly is shifted along the second direction, the magnetofluid film is deformed by the magnetic member to move the lens assembly to compensate for the shift of the lens assembly along the second direction; wherein the second direction is perpendicular to the first direction.
3. The camera module of claim 2, further comprising:
a sensor disposed on the lens assembly, the sensor being configured to detect an offset distance or an offset angle of the lens assembly in the first direction and/or the second direction;
the controller, the controller with the sensor with magnetic part electric connection, the controller is based on offset distance or the skew angle adjusts the current value and the current direction of magnetic part, and then adjusts the deformation volume and the deformation direction of magnetic fluid membrane.
4. The camera module of claim 1, wherein the ferrofluid film is disposed on a side of the lens assembly facing away from the lens, and the ferrofluid film drives the lens assembly to move in a direction opposite to the first direction when the lens assembly is displaced in the first direction.
5. The camera module of claim 2, wherein the ferrofluid films comprise a first ferrofluid film and a second ferrofluid film, the first ferrofluid film disposed on a first side of the lens assembly and the second ferrofluid film disposed on a second side of the lens assembly;
the magnetic part comprises a first coil and a second coil, the first coil is arranged on the first side of the lens assembly, and the second coil is arranged on the second side of the lens assembly;
the first magnetofluid film deforms under the action of the first coil to drive the lens assembly to move along the second direction; the second magnetofluid film deforms under the action of the second coil, and the lens assembly is driven to move in the direction opposite to the second direction.
6. The camera module according to claim 1, further comprising a circuit board, wherein the circuit board is stacked with the lens assembly, and the magnetic member comprises a first coil electrically connected to the circuit board;
the magnetofluid film comprises a first deformation part, the first deformation part is located on one side of a perpendicular bisector of one side edge of the lens assembly, the first deformation part is opposite to the first coil, and the orthographic projection of the lens assembly or the circuit board on the magnetofluid film is overlapped with the first deformation part.
7. The camera module according to claim 6, wherein when the first coil is energized with a forward current, the first deformation portion deforms in the first direction to form a protrusion on a surface of the first deformation portion, the surface being close to the lens assembly; under the condition that negative current is introduced into the first coil, the first deformation part deforms along the direction opposite to the first direction, so that the first deformation part is close to the surface of the lens assembly to form a concave part.
8. The camera module of claim 2, wherein the magnetic element comprises a first coil and a second coil;
the magnetofluid film comprises a first deformation part and a second deformation part, the first deformation part is opposite to the first coil, the second deformation part is opposite to the second coil, and the first deformation part deforms under the action of the first coil to drive the lens assembly to move along the first direction; the second deformation part deforms under the action of the second coil and drives the lens assembly to move along the second direction, and the second direction is perpendicular to the first direction.
9. The camera module according to claim 8, wherein when the first coil is energized with a forward current, the first deformation portion deforms in the first direction to form a protrusion on a surface of the first deformation portion, the surface being close to the lens assembly; under the condition that negative current is introduced into the first coil, the first deformation part deforms along the direction opposite to the first direction, so that the first deformation part is close to the surface of the lens assembly to form a concave part;
under the condition that forward current is introduced into the second coil, the second deformation part deforms along the second direction to enable the second deformation part to be close to the surface of the lens component to form a protrusion; and under the condition that negative current is introduced into the second coil, the second deformation part deforms along the direction opposite to the second direction, so that the second deformation part is close to the surface of the lens assembly to form a concave part.
10. The camera module of claim 1, further comprising a circuit board,
the ferrofluid film is connected with and covers the circuit board.
11. An electronic device, comprising the camera module of any one of claims 1-10.
12. The electronic device of claim 11, further comprising a gyroscope to detect an offset angle of the lens assembly, the camera module to control a deformation direction and a deformation amount of the magnetofluid film based on the offset angle; and/or
The electronic equipment further comprises a Hall element, the Hall element is used for detecting the offset distance of the lens assembly, and the camera module controls the deformation direction and the deformation amount of the magnetofluid film based on the offset distance.
13. A camera module anti-shake control method is characterized by comprising the following steps:
acquiring the offset distance or the offset angle of the lens assembly in the first direction;
and controlling the current value and the current direction of the magnetic part based on the offset distance or the offset angle so as to deform the magnetic fluid film and drive the lens assembly to move so as to compensate the offset of the lens assembly along the first direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210459883.7A CN114827418A (en) | 2022-04-24 | 2022-04-24 | Camera module, electronic equipment and anti-shake control method of camera module |
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| CN202210459883.7A CN114827418A (en) | 2022-04-24 | 2022-04-24 | Camera module, electronic equipment and anti-shake control method of camera module |
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| CN115802131A (en) * | 2023-01-30 | 2023-03-14 | 荣耀终端有限公司 | Camera module and electronic equipment |
| WO2024169999A1 (en) * | 2023-02-13 | 2024-08-22 | 高瞻创新科技有限公司 | Multi-axis control and correction system for camera module |
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