CN112531981A - Anti-shake motor, closed-loop control method for anti-shake motor, and image pickup apparatus - Google Patents
Anti-shake motor, closed-loop control method for anti-shake motor, and image pickup apparatus Download PDFInfo
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- CN112531981A CN112531981A CN202011470308.4A CN202011470308A CN112531981A CN 112531981 A CN112531981 A CN 112531981A CN 202011470308 A CN202011470308 A CN 202011470308A CN 112531981 A CN112531981 A CN 112531981A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
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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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- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Studio Devices (AREA)
- Adjustment Of Camera Lenses (AREA)
Abstract
The embodiment of the invention relates to the technical field of camera shooting, and discloses an anti-shake motor, a closed-loop control method of the anti-shake motor and camera shooting equipment. The anti-shake motor in the present invention comprises: the device comprises a rotor, a support, a rotor electrode plate, a stator assembly, a stator electrode plate and a processing unit, wherein the support moves along a preset direction along with the rotor, the rotor electrode plate is arranged on the support, the stator assembly is arranged around the periphery of the support, the stator electrode plate is arranged on the stator assembly, the rotor electrode plate and the stator electrode plate are arranged oppositely, the relative position between the rotor electrode plate and the stator electrode plate is changed along with the movement of the support, and the processing unit is connected with the rotor electrode plate and the stator electrode plate and is used for controlling the rotor to move along the preset direction according to a capacitance signal of a. Therefore, the closed-loop control of the anti-vibration motor is realized, the cost of the motor is reduced, and the internal volume of the motor is saved.
Description
Technical Field
The embodiment of the invention relates to the technical field of camera shooting, in particular to an anti-shake motor, a closed-loop control method of the anti-shake motor and camera shooting equipment.
Background
In order to improve the picture quality of the image pickup device during shooting, an optical anti-shake technology can be adopted in the image pickup device to perform motion compensation on the shaking of the image pickup device. In performing motion compensation, shake detection is generally performed using a gyroscope in an anti-shake motor in the image pickup apparatus, and then the lens is moved in the reverse direction by the anti-shake motor, thereby compensating for an image blur phenomenon caused by shake of the image pickup apparatus.
The inventors have found that at least the following problems exist in performing motion compensation in the related art: in the related art, after the lens is detected to shake, the hall sensor and the corresponding magnet for sensing are used for detecting the real-time position of the rotor in the anti-shake motor, however, the hall sensor and the magnet for sensing arranged inside the motor occupy a large internal space, which is not beneficial to realizing the miniaturization of the motor. In addition, the Hall sensor and the sensing magnet occupy a larger space in the motor, so that the size of the arranged magnet and coil for driving the rotor to move is limited on the premise of limited space in the motor, the driving force of the motor is not improved, and the compensation efficiency is reduced. And finally, the Hall sensor has higher cost, and is not beneficial to reducing the cost of the anti-shake motor.
Disclosure of Invention
An embodiment of the present invention provides an anti-shake motor, a closed-loop control method of the anti-shake motor, and an image pickup apparatus, so as to implement closed-loop control of the anti-shake motor, reduce the cost of the motor, and save the internal volume of the motor.
To solve the above technical problem, an embodiment of the present invention provides an anti-shake motor, including: the device comprises a rotor, a support, a rotor electrode plate, a stator assembly, a stator electrode plate and a processing unit, wherein the support moves along a preset direction along with the rotor, the rotor electrode plate is arranged on the support, the stator assembly is arranged around the periphery of the support, the stator electrode plate is arranged on the stator assembly, the rotor electrode plate and the stator electrode plate are arranged oppositely, the relative position between the rotor electrode plate and the stator electrode plate is changed along with the movement of the support, and the processing unit is connected with the rotor electrode plate and the stator electrode plate and is used for controlling the rotor to move along the preset direction according to a capacitance signal of a.
The embodiment of the invention also provides a closed-loop control method of the anti-shake motor, which is applied to the anti-shake motor and comprises the following steps: when the rotor is controlled to move in a preset direction, the change of a capacitance signal generated by a capacitor is acquired; calculating the variation of the relative position between the rotor electrode plate and the stator electrode plate according to the variation of the capacitance signal, and determining the position variation of the lens in the preset direction according to the variation; and controlling the rotor to move in the preset direction according to the position change.
An embodiment of the present invention also provides an image pickup apparatus including: the lens is used for driving the anti-shake motor of the lens, and the lens is arranged on a rotor of the anti-shake motor.
Compared with the related art, the embodiment of the invention is characterized in that a support of the anti-shake motor is provided with a rotor electrode plate, a stator assembly surrounding the periphery of the support is provided with a stator electrode plate, the rotor electrode plate and the stator electrode plate are oppositely arranged to form a capacitor, when the rotor moves along a preset direction, the support moves along with the rotor in the preset direction, so as to drive the rotor electrode plate on the support to move, the relative position between the rotor electrode plate and the stator electrode plate is changed along with the movement of the support, after the relative position between the rotor electrode plate and the stator electrode plate is changed, a capacitance signal generated by the capacitor formed by the two electrode plates is changed, a processing unit connected with the rotor electrode plate and the stator electrode plate can determine the current position of the stator according to the capacitance signal, and judge whether the position meets the compensation for the shake or not, and if not, controlling the rotor to move along the preset direction according to the capacitance signal to continuously compensate the jitter. Utilize runner plate electrode and stator plate electrode to replace the hall sensor in the anti-shake motor, reduced the cost of anti-shake motor, and saved the inside volume that the inside device that sets up of anti-shake motor occupied.
In addition, the stator assembly includes: the rotor electrode plate is attached to the support and located between the support and the circuit substrate, and the stator electrode plate is arranged on the circuit substrate.
The stator electrode plate is a metal conductive layer printed on a partial region of the circuit substrate, and the metal conductive layer is arranged to face the mover electrode plate to form a capacitor. The volume occupied by the metal conducting layer printed on the circuit substrate is small, so that the occupied volume of the internal volume can be further reduced, and the miniaturization of the anti-shake motor is facilitated.
The stator electrode plate is a metal sheet provided on the circuit board, and the metal sheet and the mover electrode plate are provided to face each other to form a capacitor.
In addition, the anti-shake motor further comprises a conductive structure, the conductive structure connects the rotor electrode plate to the circuit substrate, and the circuit substrate is used for electrifying the rotor electrode plate through the conductive structure. The mover electrode plate can be electrified without changing the position of a power supply in the anti-shake motor.
In addition, the conductive structure includes: the metal suspension wire is arranged on the conductive circuit on the support and is used for connecting the conductive circuit and the circuit substrate. The active cell electrode plate is electrified under the assistance of the original metal suspension wires in the anti-shake motor, so that the difficulty of setting a conductive structure is reduced.
In addition, the stator assembly includes: the stator electrode plate is arranged on the metal shell. The stator electrode plate can be grounded through the metal shell, and an additional grounding circuit for the stator electrode plate is not needed, so that the cost is reduced.
In addition, the stator assembly includes: the stator electrode plates are partial regions of the metal shell opposite to the rotor electrode plates, and partial regions of the metal shell are arranged opposite to the rotor electrode plates to form capacitors. The active cell electrode plates directly form a capacitor with the metal shell, and the shake can be corrected only by arranging the active cell electrode plates, so that the cost is further reduced.
In addition, the support is provided with a groove, the opening direction of the groove faces the metal shell, and the rotor electrode plate is accommodated in the groove. The stability of the rotor electrode plate is ensured, and the rotor electrode plate is prevented from falling off the support.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural view of an anti-shake motor according to a first embodiment of the present invention;
fig. 2 is a side view of an anti-shake motor according to a first embodiment of the present invention;
fig. 3 is a sectional view of an anti-shake motor in a focusing direction according to a second embodiment of the present invention;
fig. 4 is a sectional view of an anti-shake motor in a focusing direction according to a third embodiment of the present invention;
FIG. 5 is a schematic view illustrating a connection relationship between a mover electrode plate and a stator electrode plate and a processing unit in the anti-shake motor according to the present invention;
fig. 6 is a flowchart of a closed-loop control method of an anti-shake motor according to a fourth embodiment of the present invention;
fig. 7 is an interaction diagram of an anti-shake motor and a control chip according to a fourth embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
A first embodiment of the invention relates to an anti-shake motor. As shown in fig. 1 to 2, the anti-shake motor includes: the power supply device comprises a rotor 1, a support 2 moving along a preset direction along with the rotor 1, a rotor electrode plate 3 arranged on the support 2, a stator assembly 4 arranged around the periphery of the support 2, a stator electrode plate 5 arranged on the stator assembly 4, and a processing unit (not marked), wherein the rotor electrode plate 3 and the stator electrode plate 5 are arranged oppositely, the relative position between the rotor electrode plate 3 and the stator electrode plate 5 is changed along with the movement of the support 2, and the processing unit is connected with the rotor electrode plate 3 and the stator electrode plate 5 and is used for controlling the rotor 1 to move along the preset direction according to a capacitance signal of a capacitor formed by the rotor electrode plate 3 and the stator electrode plate 5. Here, the predetermined direction of the mover 1 is opposite to the direction of the lens shift from the optical axis.
The movable direction of the mover in the anti-shake motor can be set to be X, Y and Z directions, wherein the X, Y and Z directions are mutually perpendicular, the Z direction is consistent with the focusing direction of the lens, and the preset direction of the movement of the mover is consistent with the X and Y directions.
In addition, the anti-shake motor may be an electromagnetic motor, a piezoelectric motor, or a shape memory alloy motor. The electromagnetic motor is a motor using electromagnetic force of a coil and a magnet as a driving force, the piezoelectric motor is a motor using piezoelectric effect of ultrasonic piezoelectric ceramics as a driving force, and the shape memory alloy motor is a motor using deformation characteristics of a memory metal as a driving force. In different types of anti-shake motors, the bracket for arranging the stator electrode plate can be selected according to the type of the driving force of the anti-shake motor, for example, the electromagnetic bracket is selected as the bracket for arranging the stator electrode plate in the electromagnetic motor, and the base or the metal shell is selected as the bracket for arranging the stator electrode plate in the piezoelectric motor or the shape memory alloy motor.
Compared with the related art, the embodiment of the invention is characterized in that a support of the anti-shake motor is provided with a rotor electrode plate, a stator assembly surrounding the periphery of the support is provided with a stator electrode plate, the rotor electrode plate and the stator electrode plate are oppositely arranged to form a capacitor, when the rotor moves along a preset direction, the support moves along with the rotor in the preset direction, so as to drive the rotor electrode plate on the support to move, the relative position between the rotor electrode plate and the stator electrode plate is changed along with the movement of the support, after the relative position between the rotor electrode plate and the stator electrode plate is changed, a capacitance signal generated by the capacitor formed by the two electrode plates is changed, a processing unit connected with the rotor electrode plate and the stator electrode plate can determine the current position of the stator according to the capacitance signal, and judge whether the position meets the compensation for the shake or not, and if not, controlling the rotor to move along the preset direction according to the capacitance signal to continuously compensate the jitter. Utilize runner plate electrode and stator plate electrode to replace the hall sensor in the anti-shake motor, reduced the cost of anti-shake motor, and saved the inside volume that the inside device that sets up of anti-shake motor occupied.
A second embodiment of the invention relates to an anti-shake motor. The second embodiment is substantially the same as the first embodiment except that the stator electrode plates are provided on the circuit board in the second embodiment of the present invention. As shown in fig. 3, the anti-shake motor structure includes a stator assembly including: the stator electrode plate 5 is provided on the circuit board 41, and the mover electrode plate 3 is attached to the holder 2 and is located between the holder 2 and the circuit board 41. The mover electrode plates 3 form a capacitor with the stator electrode plates 5 provided on the circuit substrate 41.
In addition, the stator electrode plates 5 provided on the circuit substrate 41 may be a metal conductive layer printed on a partial region of the circuit substrate. Alternatively, a metal sheet is provided on the base 6 on which the circuit board 41 is mounted, and the metal sheet is used as the stator electrode plate 5 and the mover electrode plate 3 to form a capacitor.
In addition, the anti-shake motor further includes a conductive structure connecting the mover electrode plate 3 to the circuit substrate, and the circuit substrate 41 is configured to energize the mover electrode plate through the conductive structure. The stator electrode plates 5 are disposed on the circuit substrate 41, and thus can be directly connected to the wiring in the circuit substrate 41 to achieve energization.
In addition, when the anti-shake motor is a motor that performs a limiting motion by using balls, a conductive structure needs to be added to connect the mover electrode plate 3 and the circuit substrate 41. If the anti-shake motor is a motor which utilizes the metal suspension wires to perform limiting movement, the conductive circuit arranged on the support 2 and the metal suspension wires 7 connecting the conductive circuit and the circuit substrate 41 can be utilized to form a conductive structure, so that the connection between the rotor electrode plate 3 and the circuit substrate 41 is realized, the original metal suspension wires 7 in the anti-shake motor are utilized to conduct electricity, and the difficulty of the conductive structure is reduced.
The anti-shake motor in this embodiment realizes the closed-loop control as follows: after the gyroscope detects that the mover 1 shakes, the mover 1 is controlled to move in the preset direction to perform shake compensation, the mover 1 moves in the preset direction to drive the support 2 to move along the preset direction, so that the position of the mover electrode plates 3 arranged on the support 2 changes, on the other hand, the stator assembly 4 does not change position along with the movement of the mover 1, therefore, the position of the stator electrode plates 5 arranged on the stator assembly 4 does not change, that is, after the position of the mover electrode plates 3 changes, the facing area between the mover electrode plates 3 and the stator electrode plates 5 changes, and the capacitance signal generated by the capacitance formed by the two electrode plates changes. The position change of the mover 1 in the preset direction can be determined according to the variation of the capacitance signal, if the position change of the mover 1 meets the jitter compensation, the mover 1 does not need to be controlled to move continuously, and if the position change of the mover 1 does not meet the jitter compensation, the mover 1 is controlled to move continuously in the preset direction until the jitter compensation is met. When the mover is controlled to move in the preset direction according to the capacitance signal, the movement of the mover is controlled according to the corresponding relationship between the pre-stored capacitance signal and the position of the mover. When the positive area and the opposite area of the polar plate and the conductive part change along with the movement of the rotor, so that the capacitance signal changes, the corresponding relation between the capacitance signal and the position of the rotor is a linear relation.
Compared with the related art, the second embodiment of the invention forms the capacitor by utilizing the active cell electrode plate and the conductive metal layer printed on the circuit substrate, and the volume occupied by the metal conductive layer printed on the circuit substrate is smaller, thereby further reducing the occupied volume of the internal volume and being beneficial to the miniaturization of the anti-vibration motor.
A third embodiment of the present invention relates to an anti-shake motor. The third embodiment is substantially the same as the first embodiment except that in the third embodiment of the present invention, the stator electrode plate 5 is provided on the metal case 42, and the anti-vibration motor structure is as shown in fig. 4, and the stator assembly includes: the stator electrode plates 5 are partial regions of the metal casing 42 facing the mover electrode plates 3, and partial regions of the metal casing 42 are opposite to the mover electrode plates 3 to form capacitors. The mover electrode plate 3 directly forms a capacitor with the metal casing 42, and the shake can be corrected only by arranging the mover electrode plate 3, so that the cost is further reduced. Or, the metal casing 42 may be further provided with the additional stator electrode plate 5, the position of the additional stator electrode plate 5 corresponds to the position of the mover electrode plate 3, and a capacitor is formed between the additional stator electrode plate 5 and the mover electrode plate 3.
In addition, the holder 2 is provided with a recess having an opening directed toward the metal case 42, and the mover electrode plate 3 is accommodated in the recess. Thereby guaranteed the stability of active cell plate electrode, avoided active cell plate electrode to drop on the support.
In addition, the anti-shake motor further includes a conductive structure connecting the mover electrode plate 3 to the circuit substrate, and the circuit substrate 41 is configured to energize the mover electrode plate 3 through the conductive structure. The stator electrode plates 5 are disposed on the metal case 42, and the stator electrode plates 5 are attached to the metal case 42 and are grounded to the metal case 42, so that the mover electrode plates 3 and the stator electrode plates 5 form a self-capacitance.
The anti-shake motor in this embodiment realizes the closed-loop control as follows: after the gyroscope detects that the mover 1 shakes, the mover 1 is controlled to move in the preset direction to perform shake compensation, the mover 1 moves in the preset direction to drive the support 2 to move along the preset direction, so that the position of the mover electrode plates 3 arranged on the support 2 changes, on the other hand, the position of the stator electrode plates 5 arranged on the stator assembly 4 (the metal shell 42) does not change along with the movement of the mover 1, and therefore the position of the stator electrode plates 5 arranged on the stator assembly 4 (the metal shell 42) does not change, that is, after the position of the mover electrode plates 3 changes, the distance between the mover electrode plates 3 and the stator electrode plates 5 changes, and a capacitance signal generated by capacitance formed by the two electrode plates changes. The position change of the mover 1 in the preset direction can be determined according to the variation of the capacitance signal, if the position change of the mover 1 meets the jitter compensation, the mover 1 does not need to be controlled to move continuously, and if the position change of the mover 1 does not meet the jitter compensation, the mover 1 is controlled to move continuously in the preset direction until the jitter compensation is met. When the mover is controlled to move in the preset direction according to the capacitance signal, the movement of the mover is controlled according to the corresponding relationship between the pre-stored capacitance signal and the position of the mover. When the distance between the polar plate and the conductive part changes along with the movement of the rotor, so that the capacitance signal changes, the corresponding relation between the capacitance signal and the position of the rotor is in an inverse proportion relation.
In addition, in order to ensure that the processing unit can receive the capacitance signal, as shown in fig. 6, the processing unit needs to be connected to a stator electrode plate pin and a rotor electrode plate pin in the circuit substrate, wherein the stator electrode plate pin is connected to the rotor electrode plate, and the stator electrode plate pin is connected to the stator electrode plate, so that the processing unit can receive the capacitance signal generated by the capacitance formed by the rotor electrode plate and the stator electrode plate in real time, and can make feedback according to the capacitance signal.
In addition, in practical applications, in addition to the compensation of the shake in the preset direction (i.e., the vertical direction of the focusing direction, which is also the X and Y directions), the shake may also be compensated in the vertical direction of the preset direction (i.e., the focusing direction, which is also the Z direction). When the shake in the preset direction is compensated, a rotor electrode plate can be arranged on the rotor, a stator electrode plate is arranged on the support, a capacitor is formed between the rotor electrode plate and the stator electrode plate, and the shake in the preset direction is compensated by detecting a capacitor signal.
In addition, in the dither motor, the capacitors mentioned in the first to third embodiments may be repeatedly or combined to form a plurality of sets of capacitors, and the plurality of sets of capacitors are disposed at different positions in the dither motor to detect the implementation positions of the mover in multiple directions, thereby ensuring the accuracy of detection. Besides, the shake compensation motor can also include a capacitor for compensating shake in a preset direction (namely the vertical direction of the focusing direction, namely the X and Y directions) and a capacitor for compensating shake in the vertical direction of the preset direction (namely the focusing direction, namely the Z direction), so that shake compensation in any direction of the X, Y and Z directions is realized, and the shake compensation effect is improved. The driving circuit comprises a driving part, a driving part and a capacitor detection circuit, wherein corresponding capacitors are arranged in each direction, each capacitor is correspondingly provided with one capacitor detection circuit and one driving circuit, the capacitor detection circuits are used for detecting the corresponding capacitors in the direction and transmitting capacitor signals to the analysis and calculation circuit, the analysis and calculation circuit determines driving current (or driving voltage) according to the capacitor signals, and the driving current (or driving voltage) is transmitted to the driving part in the direction corresponding to the motor through the driving current, so that the control of the motor rotor is completed.
Compared with the related art, the third embodiment of the invention utilizes the active cell electrode plate and the metal shell to form a self-capacitance, and the vibration can be corrected by adding the active cell electrode plate, so that the cost is further reduced.
A fourth embodiment of the present invention relates to a closed-loop control method for a focus motor, and the specific flow is shown in fig. 6, including:
When the jitter signal detection circuit of the control chip detects a jitter signal, it is described that the jitter needs to be compensated at this time, and the capacitance signal needs to be acquired in the same manner.
Specifically, referring to the first to third embodiments, in order to avoid repetition, the mover electrode plates and the stator electrode plates form a capacitor, and when the relative position between the mover electrode plates and the stator electrode plates changes, the formed capacitor generates a changed capacitor signal, for example, when the facing area or distance between the mover electrode plates and the stator electrode plates changes, the capacitor signal can generate a changed capacitor signal. And performing fitting calculation on the position of the rotor according to the capacitance signals to obtain the real-time position of the rotor, wherein each generated capacitance signal correspondingly calculates the real-time position of one rotor, so that the motion condition of the rotor can be determined according to the generated changed capacitance signals. For example, the correspondence relationship between the capacitance signal and the mover position may be tested and stored in advance, and after the capacitance signal generated by the capacitance is detected, the current position of the mover may be determined based on the pre-stored correspondence relationship. The corresponding relation between the capacitance signal and the position of the rotor can be a linear relation or an inverse proportional relation, for example, when the positive area and the opposite area of the polar plate and the conductive part change along with the movement of the rotor, so that the capacitance signal changes, the corresponding relation between the capacitance signal and the position of the rotor is a linear relation; when the distance between the polar plate and the conductive part changes along with the movement of the rotor, so that the capacitance signal changes, the corresponding relation between the capacitance signal and the position of the rotor is in an inverse proportion relation.
Specifically, assuming that the position of the mover after the jitter compensation is a target position, after acquiring the position change of the mover, the mover is controlled to move in a preset direction according to a distance of a phase difference between the target position of the mover and a current position of the mover, so that the mover can reach the target position to complete the jitter compensation. When the mover is controlled to move according to the distance of the difference between the target position of the mover and the current position of the mover, if the current position is the same as the target position, the moving is finished, and the mover is kept at the current position; and if the current position is different from the target position, increasing or decreasing the driving current (driving voltage), repeatedly acquiring the capacitance signal, determining the current position of the rotor according to the capacitance signal, comparing whether the current position is overlapped with the target position or not until the current position is overlapped with the target position, and finishing closed-loop control.
In addition, the closed-loop control may be implemented by a control chip, and the control chip includes, as shown in fig. 7: the capacitance detection circuit corresponding to each direction capacitance part in the motor, the analysis and calculation circuit and the control output circuit corresponding to each direction driving part in the motor. The capacitance detection circuit is used for detecting capacitance signals between the polar plate and the conductive part, the plurality of capacitance detection circuits can transmit acquired information to the same analysis and calculation circuit, and the analysis and calculation circuit is used for judging whether the mover moves or not and judging the driving current (or driving voltage) required by the movement according to the acquired capacitance signals. The analysis and calculation circuit returns the calculated driving current (or driving voltage) to the corresponding control output circuit, and the control output circuit is used for outputting the calculated driving current (or driving voltage) to the motor so as to control the mover of the motor to move.
In addition, after the motor rotor is controlled to move, the moved rotor drives the capacitance signal generated by the capacitor to change again, and the control chip performs analysis and calculation again according to the changed capacitance signal until the current position of the rotor is overlapped with the target position, so that the control of the motor is completed.
A fifth embodiment of the present invention relates to an image pickup apparatus including: the lens is used for driving the focusing motor of the lens, and the lens is arranged on a rotor of the anti-shake motor.
Compared with the related art, the image capturing apparatus according to the fifth embodiment of the present invention is provided with the anti-shake motor according to the previous embodiment, and therefore, the image capturing apparatus also has the technical effects of the previous embodiment, which will not be described herein again.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. An anti-shake motor, comprising: the utility model discloses a support, including stator plate electrode, processing unit, power, runner, the support that moves along preset direction along the runner, set up in runner plate electrode on the support encloses to be located support outlying stator module, set up in stator plate electrode on the stator module, and processing unit, runner plate electrode with stator plate electrode sets up relatively, just relative position between runner plate electrode with stator plate electrode changes along with the removal of support, processing unit with runner plate electrode reaches stator plate electrode is connected for according to runner plate electrode with the capacitance signal control of the electric capacity that stator plate electrode formed the runner moves along preset direction.
2. The anti-shake motor according to claim 1, wherein the stator assembly comprises: the stator electrode plate is arranged on the circuit substrate.
3. The anti-shake motor according to claim 2, wherein the stator electrode plates are metal conductive layers printed on a partial region of the circuit substrate, and the metal conductive layers are disposed opposite to the mover electrode plates to form a capacitor.
4. The anti-shake motor according to claim 2, wherein the stator electrode plates are metal sheets disposed on the circuit substrate, and the metal sheets are disposed opposite to the mover electrode plates to form capacitors.
5. The anti-shake motor according to any one of claims 2 to 4, further comprising: the conductive structure connects the rotor electrode plate to the circuit substrate, and the circuit substrate is used for electrifying the rotor electrode plate through the conductive structure.
6. The anti-shake motor according to claim 5, wherein the conductive structure includes: the metal suspension wire is arranged on the support and is used for connecting the conductive circuit and the circuit substrate.
7. The anti-shake motor according to claim 1, wherein the stator assembly comprises: the stator electrode plate is arranged on the metal shell.
8. The anti-shake motor according to claim 1, wherein the stator assembly comprises: the stator electrode plates are partial regions of the metal shell opposite to the rotor electrode plates, and the partial regions of the metal shell and the rotor electrode plates are arranged oppositely to form a capacitor.
9. A closed-loop control method of an anti-shake motor, applied to the anti-shake motor according to any one of claims 1 to 8, comprising:
when the rotor is controlled to move in a preset direction, the change of a capacitance signal generated by a capacitor is acquired;
calculating the variation of the relative position between the rotor electrode plate and the stator electrode plate according to the variation of the capacitance signal, and determining the position variation of the lens in the preset direction according to the variation;
and controlling the rotor to move in the preset direction according to the position change.
10. An image pickup apparatus characterized by comprising: a lens, the anti-shake motor of any one of claims 1 to 8 for driving the lens, the lens being provided on a mover of the anti-shake motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011470308.4A CN112531981B (en) | 2020-12-14 | 2020-12-14 | Anti-shake motor, closed-loop control method for anti-shake motor, and image pickup apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011470308.4A CN112531981B (en) | 2020-12-14 | 2020-12-14 | Anti-shake motor, closed-loop control method for anti-shake motor, and image pickup apparatus |
Publications (2)
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| CN113193781A (en) * | 2021-03-26 | 2021-07-30 | 基合半导体（宁波）有限公司 | Anti-shake motor, closed-loop control method of anti-shake motor and periscopic shooting module |
| CN114614629A (en) * | 2022-05-10 | 2022-06-10 | 基合半导体（宁波）有限公司 | Anti-shake motor, camera module and electronic equipment |
| CN114845030A (en) * | 2022-05-31 | 2022-08-02 | 维沃移动通信有限公司 | Camera module, control method and device and electronic equipment |
| CN115297233A (en) * | 2022-07-13 | 2022-11-04 | 维沃移动通信有限公司 | Motor and electronic apparatus |
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