Driving motor and control method thereof, camera module and electronic equipment

Abstract

The invention relates to a driving motor and a control method thereof, a camera module and electronic equipment, relates to the technical field of electronic equipment, and is used for improving the effect of realizing an automatic focusing function by the camera module. The driving motor is applied to the camera module, and the camera module comprises a lens. The driving motor comprises a movable seat and an electromagnetic driving assembly. The movable seat comprises a first side wall and a second side wall, and the plane where the first side wall is located is not parallel to the plane where the second side wall is located. The movable seat is used for bearing a lens. The electromagnetic driving assembly at least comprises a first electromagnetic driving pair and a second electromagnetic driving pair. The first electromagnetic drive pair is connected to the first side wall, and the second electromagnetic drive pair is connected to the second side wall. The electromagnetic driving assembly is used for driving the movable seat to move.

Description

Technical Field

[0001] This disclosure relates to the field of electronic equipment technology, and in particular to a drive motor and its control method, a camera module, and an electronic device. Background Technology

[0002] Electronic devices such as mobile phones, tablets, and personal computers (PCs) all have camera modules used to capture pictures and videos. In some high-end electronic devices, the camera module typically integrates a drive motor. This drive motor moves the lens relative to the image sensor to achieve functions such as automatic focusing (AF), optical image stabilization (OIS), and wide-angle tracking.

[0003] However, current electronic devices suffer from poor autofocus performance in camera modules. Summary of the Invention

[0004] This application provides a drive motor and its control method, a camera module, and an electronic device to improve the effect of the camera module in achieving autofocus.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a drive motor is provided. This drive motor is applied to a camera module, which includes a lens. The drive motor includes a movable base and an electromagnetic drive assembly. The movable base includes a first sidewall and a second sidewall, the planes of which are not parallel. The movable base is used to support the lens. The electromagnetic drive assembly includes at least a first electromagnetic drive pair and a second electromagnetic drive pair. The first electromagnetic drive pair is connected to the first sidewall, and the second electromagnetic drive pair is connected to the second sidewall. The electromagnetic drive assembly is used to drive the movable base to move.

[0007] A camera module may include a lens and a drive motor. The drive motor is used to move the lens along the optical axis to achieve optical focusing.

[0008] The electromagnetic drive assembly may include at least two electromagnetic drive pairs, each connected to a movable base. Each electromagnetic drive pair can provide a driving force to the movable base to move along the optical axis. Notably, the at least two electromagnetic drive pairs do not need to be connected to the two parallel sidewalls on the movable base, increasing the flexibility of the connection between the electromagnetic drive pairs and the movable base.

[0009] In the embodiments of this application, the electromagnetic drive assembly may include at least two electromagnetic drive pairs, and each electromagnetic drive pair is capable of providing a driving force to the movable seat in the direction of the optical axis. Therefore, compared to a scheme where only one electromagnetic drive pair provides a driving force to the movable seat, the electromagnetic drive assembly provided in this application can provide a larger driving force to the movable seat and the lens. In this way, the electromagnetic drive assembly provides a larger driving force to the movable seat, so even if the lens is a heavy lens such as a glass lens or a high-density lens, it can quickly and accurately drag the lens to the focusing position, realize the camera module's rapid focusing, and improve the usability of the electronic device's autofocus function.

[0010] In some feasible embodiments of the first aspect, the first electromagnetic drive pair includes a first coil and a first magnetic element; the first coil and the first magnetic element are spaced apart, and the first magnetic element is located on a movable base. The second electromagnetic drive pair includes a second coil and a second magnetic element; the second coil and the second magnetic element are spaced apart, and the second magnetic element is located on a movable base. The first coil includes a first surface and a second surface disposed opposite to each other in the direction of movement of the movable base. The second coil includes a third surface and a fourth surface disposed opposite to each other in the direction of movement of the movable base. The plane containing the third surface is located between the plane containing the first surface and the plane containing the second surface.

[0011] It should be noted that this embodiment is only described with the electromagnetic drive centering magnetic component located in the movable seat as an example. In other embodiments, the electromagnetic drive centering coil may also be located in the movable seat.

[0012] An electromagnetic drive creates an interaction force between the magnetic component and the coil. Therefore, with the coil position fixed, the coil exerts a force on the magnetic component, which in turn generates a driving force on the movable seat where the magnetic component is located. Since the driving force on the movable seat is provided by the coil, the two surfaces of the coil positioned opposite each other in the direction of movement of the movable seat actually determine the range of the driving force provided by the electromagnetic drive to the movable seat.

[0013] In this embodiment, the plane containing the third surface is located between the plane containing the first surface and the plane containing the second surface. This can be understood as follows: one boundary of the range within which the second electromagnetic drive provides driving force to the opposing movable seat is located within the range within which the first electromagnetic drive provides driving force to the opposing movable seat. The other boundary of the range within which the second electromagnetic drive provides driving force to the opposing movable seat may or may not be located within the range within which the first electromagnetic drive provides driving force to the opposing movable seat.

[0014] For example, the two boundaries of the range in which the second electromagnetic drive provides driving force to the movable seat are entirely within the range in which the first electromagnetic drive provides driving force to the movable seat. Understandably, throughout the entire process of the second electromagnetic drive providing driving force to the movable seat, the first electromagnetic drive pair also provides driving force to the movable seat. During the period when the second electromagnetic drive pair provides driving force to the movable seat, both electromagnetic drive pairs provide driving force to the movable seat in the direction of the optical axis. The electromagnetic drive assembly provides a large driving force to the movable seat, enabling the lens to be dragged quickly and accurately to the focusing position, achieving rapid focusing of the camera module and improving the usability of the electronic device's autofocus function.

[0015] For example, one boundary of the range in which the second electromagnetic drive provides driving force to the movable seat is located within the range in which the first electromagnetic drive provides driving force to the movable seat; the other boundary of the range in which the second electromagnetic drive provides driving force to the movable seat is not located within the range in which the first electromagnetic drive provides driving force to the movable seat. Understandably, during part of the process in which the second electromagnetic drive provides driving force to the movable seat, the first electromagnetic drive also provides driving force to the movable seat. During the period when both the second and first electromagnetic drive pairs simultaneously provide driving force to the movable seat, the electromagnetic drive assembly provides a larger driving force to the movable seat, enabling the lens to be dragged quickly and accurately to the focusing position, achieving rapid focusing of the camera module and improving the usability of the electronic device's autofocus function.

[0016] In some feasible embodiments of the first aspect, in the direction of movement of the movable seat, the distance between the first surface and the second surface is greater than the distance between the third surface and the fourth surface.

[0017] As previously explained, the area between the first and second surfaces represents the range of driving force provided by the first electromagnetic drive to the opposing movable seat, and the area between the third and fourth surfaces represents the range of driving force provided by the first electromagnetic drive to the opposing movable seat. Therefore, it can be considered that the range of driving force provided by the first electromagnetic drive to the opposing movable seat is greater than the range of driving force provided by the second electromagnetic drive to the opposing movable seat.

[0018] For example, the range within which the second electromagnetic drive opposing movable seat provides driving force is located within the range within which the first electromagnetic drive opposing movable seat provides driving force. The range within which the second electromagnetic drive opposing movable seat provides driving force is a portion of the range within which the first electromagnetic drive opposing movable seat provides driving force.

[0019] As another example, a portion of the range within which the second electromagnetic drive opposing movable seat provides driving force is located within the range within which the first electromagnetic drive opposing movable seat provides driving force. The range within which the second electromagnetic drive opposing movable seat provides driving force partially overlaps with the range within which the first electromagnetic drive opposing movable seat provides driving force.

[0020] For example, the range by which the first electromagnetic drive provides driving force to the movable seat can be the entire range of motion of the movable seat. Understandably, the first electromagnetic drive provides driving force throughout the entire stroke of the movable seat.

[0021] In this embodiment, a first electromagnetic drive pair with a larger range of driving force provided to the movable seat can be used as the primary driving force source for the movable seat in the camera module. A second electromagnetic drive pair with a smaller range of driving force provided to the movable seat can be used as a secondary driving force source for the movable seat in the camera module. This allows the second electromagnetic drive pair to be designed to increase the driving force on the movable seat during strokes requiring a larger driving force, without needing to design the driving force range provided by the second electromagnetic drive pair to be very large, thus avoiding material waste. Furthermore, by using different ranges of driving force provided by different electromagnetic drive pairs, the electromagnetic drive assembly can flexibly design the range of driving force provided by different electromagnetic drive pairs to the movable seat, improving the design flexibility and versatility of the electromagnetic drive assembly for driving the movable seat.

[0022] In some feasible embodiments of the first aspect, the electromagnetic drive assembly further includes a third electromagnetic drive pair. The third electromagnetic drive pair is connected to a third sidewall of the movable seat. The third sidewall is parallel to the second sidewall.

[0023] For example, the movable seat has a hexagonal prism structure, including a first, second, third, fourth, fifth, and sixth circumferential surface connected end to end. The first and fourth circumferential surfaces are parallel, the second and fifth circumferential surfaces are parallel, and the third and sixth circumferential surfaces are parallel. The second sidewall can be the first circumferential surface, and the third sidewall can be the fourth circumferential surface. Of course, it can also be any other suitable two mutually parallel surfaces, which are not limited here.

[0024] For example, the movable seat has a rectangular shape and includes a first sidewall, a second sidewall, and a third sidewall. One edge of the first sidewall is connected to the edge of the second sidewall, and the other edge of the first sidewall is connected to the third sidewall. Of the three electromagnetic drive pairs, the first electromagnetic drive pair is connected to the first sidewall, the second electromagnetic drive pair is connected to the second sidewall, and the third electromagnetic drive pair is connected to the third sidewall.

[0025] By adding a third electromagnetic drive pair, the driving force of the electromagnetic drive assembly on the movable seat can be further increased, helping to quickly and accurately drag the lens to the focus position, enabling the camera module to focus rapidly and improving the usability of the electronic device's autofocus function. Furthermore, since the third sidewall is parallel to the second sidewall, when both the second and third electromagnetic drive pairs simultaneously provide driving force to the movable seat, the driving force on the movable seat in the direction perpendicular to the third sidewall can be balanced, improving the stability and reliability of the movable seat's movement.

[0026] In some feasible embodiments of the first aspect, the third electromagnetic drive pair includes a third coil and a third magnetic element; the third coil and the third magnetic element are spaced apart, and the third magnetic element is located on a movable base. The second electromagnetic drive pair includes a second coil and a second magnetic element; the second coil and the second magnetic element are spaced apart, and the second magnetic element is located on a movable base. The third coil includes a fifth surface and a sixth surface disposed opposite to each other in the direction of movement of the movable base, and the second coil includes a third surface and a fourth surface disposed opposite to each other in the direction of movement of the movable base. The plane containing the sixth surface is located between the plane containing the third surface and the plane containing the fourth surface.

[0027] As previously explained, the two surfaces of the coil positioned opposite each other in the direction of movement of the movable seat actually determine the range of driving force provided by the electromagnetic drive to the movable seat. Therefore, in this embodiment, the plane containing the sixth surface is located between the plane containing the third surface and the plane containing the fourth surface. This can be understood as one boundary of the range of driving force provided by the third electromagnetic drive to the movable seat being within the range of driving force provided by the second electromagnetic drive to the movable seat. The other boundary of the range of driving force provided by the third electromagnetic drive to the movable seat may or may not be within the range of driving force provided by the second electromagnetic drive to the movable seat.

[0028] For example, the two boundaries of the range in which the third electromagnetic drive provides driving force to the movable seat are both within the range in which the second electromagnetic drive provides driving force to the movable seat. Understandably, throughout the entire process of the third electromagnetic drive providing driving force to the movable seat, the second electromagnetic drive pair also provides driving force to the movable seat. During the period when the third electromagnetic drive pair provides driving force to the movable seat, both the third and second electromagnetic drive pairs provide driving force to the movable seat in the direction of the optical axis. The electromagnetic drive assembly provides a large driving force to the movable seat, enabling the lens to be dragged quickly and accurately to the focusing position, achieving rapid focusing of the camera module and improving the usability of the electronic device's autofocus function.

[0029] For example, one boundary of the range in which the third electromagnetic drive provides driving force to the movable seat is located within the range in which the second electromagnetic drive provides driving force to the movable seat; the other boundary of the range in which the third electromagnetic drive provides driving force to the movable seat is not located within the range in which the second electromagnetic drive provides driving force to the movable seat. Understandably, during part of the process in which the third electromagnetic drive provides driving force to the movable seat, the second electromagnetic drive also provides driving force to the movable seat. During the period when the third and second electromagnetic drive pairs simultaneously provide driving force to the movable seat, the electromagnetic drive assembly provides a larger driving force to the movable seat, enabling the lens to be dragged quickly and accurately to the focusing position, achieving rapid focusing of the camera module and improving the usability of the electronic device's autofocus function.

[0030] In some feasible embodiments of the first aspect, the first electromagnetic drive pair includes a first magnetic element. The second electromagnetic drive pair includes a second magnetic element. The volume of the first magnetic element is larger than the volume of the second magnetic element.

[0031] The force between the electromagnetic drive coil and the magnetic component is positively correlated with the magnetic flux density of the magnetic field generated by the magnetic component. The volume of the magnetic component is also positively correlated with the magnetic flux density of the magnetic field it generates. Therefore, the larger the volume of the magnetic component, the greater the force between it and the coil, and the greater the driving force provided by the electromagnetic drive to the movable seat; conversely, the smaller the volume of the magnetic component, the smaller the force between it and the coil, and the smaller the driving force provided by the electromagnetic drive to the movable seat.

[0032] Therefore, the volume of the first magnetic component is larger than that of the second magnetic component, which can be understood as the driving force provided by the first electromagnetic drive opposing movable seat being greater than the driving force provided by the second electromagnetic drive opposing movable seat.

[0033] Thus, it can be assumed that the driving force for the movement of the movable seat in the optical axis direction is mainly provided by the first electromagnetic drive pair; the secondary driving force for the movement of the movable seat in the optical axis direction includes the driving force provided by the second electromagnetic drive pair to the movable seat. It is evident that by designing different volumes of the magnetic components in different electromagnetic drive pairs, the driving force provided by each electromagnetic drive pair to the movable seat can be flexibly adjusted, helping the drive motor to be applied to a wider range of scenarios.

[0034] In some examples, the first electromagnetic drive pair can provide driving force throughout the entire stroke of the movable seat, while the second electromagnetic drive pair acts as an assist structure, providing driving force during at least a partial formation of the movable seat. Compared to a single electromagnetic drive pair providing driving force, the electromagnetic drive assembly of this application provides a greater driving force to the movable seat, enabling the lens to be dragged to the focusing position quickly and accurately, achieving rapid focusing of the camera module and improving the usability of the autofocus function of electronic devices.

[0035] In some feasible embodiments of the first aspect, the first electromagnetic drive pair includes a first coil. The second electromagnetic drive pair includes a second coil. The volume of the first coil is larger than the volume of the second coil.

[0036] As previously explained, the two surfaces of the coil, positioned opposite each other in the direction of movement of the movable base, actually determine the range of driving force provided by the electromagnetic drive to the movable base. The volume of the first coil is larger than that of the second coil, which helps the range of driving force provided by the first coil to the magnetic components on the movable base to be greater than the range of driving force provided by the second coil to the magnetic components on the movable base.

[0037] Therefore, the first electromagnetic drive pair, which provides a larger range of driving force to the movable seat, can be used as the primary driving force source for the movable seat's movement in the camera module. The second electromagnetic drive pair, which provides a smaller range of driving force, can be used as a secondary driving force source for the movable seat's movement. This allows the second electromagnetic drive pair to be designed to increase the driving force on the movable seat during strokes requiring a larger driving force, without needing to design the driving force range provided by the second electromagnetic drive pair to be also very large, thus avoiding material waste. Furthermore, by using different ranges of driving force provided by different electromagnetic drive pairs, the electromagnetic drive assembly can be flexibly designed to provide different ranges of driving force to the movable seat, improving the design flexibility and versatility of the electromagnetic drive assembly for driving the movable seat's movement.

[0038] In some feasible embodiments of the first aspect, the drive motor further includes a guide rod. The guide rod extends along the direction of movement (optical axis direction) of the movable seat. The movable seat includes a through-hole through which the guide rod passes; the movable seat moves on the guide rod.

[0039] The guide rod can limit the movement of the movable seat along the optical axis, thereby limiting the movement of the lens in the camera module along the optical axis and improving the accuracy of the camera module's autofocus.

[0040] In some feasible embodiments of the first aspect, the movable base includes a body portion and a connecting portion. The body portion is used to support the lens. The connecting portion is connected to the body portion, and a through hole is formed in the body portion. In the direction of movement of the movable base, the dimension of the connecting portion is larger than the dimension of the body portion.

[0041] The connecting part may have a through hole. The guide rod passes through the through hole, so that the movable seat moves, and the guide rod restricts the movement of the connecting part along the extension direction of the guide rod (i.e., the direction of the optical axis) through the through hole, thereby restricting the movement of the main body and the lens fixed to the main body along the direction of the optical axis.

[0042] In particular, the size of the connecting part is larger than the size of the main body in the direction of movement of the movable seat, which can ensure that the contact area between the guide rod and the connecting part is larger, thereby improving the reliability of the guide rod in restricting the movement of the connecting part along the extension direction of the guide rod (i.e., the direction of the optical axis).

[0043] The guide rod can be a single rod, for example, a long, narrow rod with a rectangular cross-section. Alternatively, there can be multiple guide rods, for example, two guide rods, each with a circular cross-section. Of course, in other examples, the cross-section of the guide rod can also be other shapes, which are not limited here.

[0044] It should be noted that each guide rod passes through a through hole, and different guide rods pass through different through holes. Therefore, the number of through holes can be equal to the number of guide rods. The opening area of ​​the through hole can be slightly larger than the cross-sectional area of ​​the guide rod.

[0045] Taking two guide rods with corresponding through holes at the connection as an example, one through hole may include a "V"-shaped contact surface for contacting the guide rod inside the through hole; the cross-sectional shape of the other through hole may include a planar contact surface (e.g., a "|"-shaped contact surface) for contacting the guide rod inside the through hole.

[0046] In this embodiment, the via uses its V-shaped contact surface to maintain two contact points with the guide rod, preventing the movable seat from moving along the straight line containing the two contact points and thus limiting the movement of the movable seat. The straight line containing the two contact points on the V-shaped contact surface of the via is parallel to the straight line containing the two contact points. Since the V-shaped contact surface restricts the movement of the movable seat, the guide rod can only contact the straight line containing the via, maintaining one contact point. In this way, there are always three contact points between the movable seat and the guide rod. The frictional resistance at each contact point between the movable seat and the guide rod is fixed. Therefore, by limiting the contact points between the movable seat and the guide rod to three constant points, stable frictional resistance between the movable seat and the guide rod can be achieved, improving the consistency of the drive motor's control of the movable seat's friction, and thus improving the accuracy of the camera module's autofocus.

[0047] In some feasible embodiments of the first aspect, a first electromagnetic drive pair is connected to the connecting portion, and a second electromagnetic drive pair is connected to the body portion. Since the size of the connecting portion is larger than the size of the body portion in the direction of movement of the movable seat, this facilitates that the size of the first magnetic element connected to the connecting portion is larger than the size of the second magnetic element connected to the body portion.

[0048] For example, each electromagnetic drive pair includes a magnetic element and a coil, with the magnetic element connected to the movable base. Therefore, in the direction of movement of the movable base, the size of the connecting portion is larger than the size of the main body portion, which allows the size of the first magnetic element to be larger than the size of the second magnetic element in the direction of movement of the movable base.

[0049] The dimensions of the magnetic component in the direction of movement of the movable seat actually determine the range of driving force provided by the electromagnetic drive to the movable seat. In the direction of movement of the movable seat, the size of the first magnetic component is larger than the size of the second magnetic component, so that the range of driving force provided by the first electromagnetic drive to the movable seat is greater than the range of driving force provided by the second electromagnetic drive to the movable seat.

[0050] In this embodiment, a first electromagnetic drive pair with a larger range of driving force provided to the movable seat can be used as the primary driving force source for the movable seat in the camera module. A second electromagnetic drive pair with a smaller range of driving force provided to the movable seat can be used as a secondary driving force source for the movable seat in the camera module. This allows the second electromagnetic drive pair to be designed to increase the driving force on the movable seat during strokes requiring a larger driving force, without needing to design the driving force range provided by the second electromagnetic drive pair to be very large, thus avoiding material waste. Furthermore, by using different ranges of driving force provided by different electromagnetic drive pairs, the electromagnetic drive assembly can flexibly design the range of driving force provided by different electromagnetic drive pairs to the movable seat, improving the design flexibility and versatility of the electromagnetic drive assembly for driving the movable seat.

[0051] In some feasible embodiments of the first aspect, the second electromagnetic drive pair includes a second coil and a second magnetic element, the second coil and the second magnetic element being spaced apart from each other. The drive motor also includes a magnetic sensor and a drive integrated circuit. The magnetic sensor is used to detect position information between the second coil and the second magnetic element. The drive integrated circuit is coupled to the magnetic sensor; the drive integrated circuit is configured to stop supplying current to the second coil if the position information indicates that the second coil and the second magnetic element are not aligned.

[0052] In some examples, the magnetic sensor can be a Hall sensor. A Hall sensor converts changes in the magnetic field formed by the second coil and the second magnetic element into changes in the output voltage. Understandably, if the position between the second coil and the second magnetic element changes, causing a change in the magnetic field formed by the two elements, the voltage output by the Hall sensor will also change accordingly.

[0053] In other examples, the magnetic sensor can be a tunneling magnetoresistance (TMR) sensor. A TMR sensor measures the change in the magnetic field formed by the second coil and the second magnetic element, which is then converted into a change in resistance that is easily measured. Understandably, if the relative position between the second coil and the second magnetic element changes, causing a change in the magnetic field formed by the two elements, the resistance output by the TMR sensor will also change accordingly.

[0054] The driver integrated circuit is coupled to the magnetic sensor. When the magnetic sensor detects that the second coil and the second magnetic element are aligned, the driver integrated circuit supplies current to the second coil; when the magnetic sensor detects that the second coil and the second magnetic element are not aligned, the driver integrated circuit stops supplying current to the second coil.

[0055] The fact that the second coil and the second magnetic component are not directly aligned indicates that even if current is applied to the second coil, no force is generated between the second coil and the second magnetic component, and the second electromagnetic drive pair will not generate a driving force along the optical axis on the movable seat.

[0056] A magnetic sensor is used to detect the positional relationship between the second coil and the second magnetic component. When the magnetic sensor detects that the second coil and the second magnetic component are not aligned, the drive integrated circuit stops supplying current to the second coil. This saves current to the second coil when the second electromagnetic drive does not generate a driving force along the optical axis on the movable seat.

[0057] In this embodiment, by adding a magnetic sensor, the drive motor can control whether each coil generates current based on the positional changes between the electromagnetic drive centering coil and the magnetic component during the automatic focusing process of the camera module, thereby improving the reliability and power consumption of the drive motor control.

[0058] In other embodiments, the drive motor may include multiple magnetic sensors, each corresponding to a multiple electromagnetic drive pair, with different magnetic sensors corresponding to different electromagnetic drive pairs.

[0059] In some feasible embodiments of the first aspect, the magnetic sensor is located within the area enclosed by the second coil. The area enclosed by the second coil has relatively abundant magnetism; therefore, placing the magnetic sensor within this area improves the sensitivity of the magnetic sensor and thus enhances its reliability.

[0060] In some feasible embodiments of the first aspect, the first sidewall and the second sidewall are connected.

[0061] The edge of the first sidewall is connected to the edge of the second sidewall. Of the two electromagnetic drive pairs, the first electromagnetic drive pair is connected to the first sidewall, and the second electromagnetic drive pair is connected to the second sidewall. The angle formed by the first and second sidewalls can be approximately 90°. However, the angle formed by the first and second sidewalls can also be other angles, and this is not limited.

[0062] In this embodiment, the first electromagnetic drive pair and the second electromagnetic drive pair can be respectively connected to two connected side walls, which improves the flexibility of connecting the electromagnetic drive pair to the movable seat.

[0063] Secondly, a method for controlling a drive motor is provided. The drive motor includes any of the drive motors described in the first aspect. The method includes controlling a second electromagnetic drive to move the drive movable seat during at least a portion of the movement of the first electromagnetic drive. The direction of movement of the drive movable seat of the first electromagnetic drive is the same as the direction of movement of the drive movable seat of the second electromagnetic drive.

[0064] In embodiments of this application, the electromagnetic drive assembly may include at least two electromagnetic drive pairs, each capable of providing a driving force to the movable seat in the direction of the optical axis. During at least a portion of the movement of the movable seat driven by the first electromagnetic drive pair, the second electromagnetic drive pair also drives the movable seat, enabling the electromagnetic drive assembly to provide a greater driving force to the movable seat and the lens. Thus, the electromagnetic drive assembly provides a greater driving force to the movable seat, allowing for rapid and accurate dragging of the lens to the focusing position, even if the lens is a heavy lens such as a glass lens or a high-density lens, thereby achieving rapid focusing of the camera module and improving the usability of the electronic device's autofocus function.

[0065] In some feasible embodiments of the second aspect, the drive motor further includes a third electromagnetic drive pair. The method further includes controlling the third electromagnetic drive pair to drive the movable seat to move during at least a portion of the movement of the movable seat by the first electromagnetic drive pair.

[0066] The direction of motion of the first electromagnetic drive pair on the movable seat is the same as the direction of motion of the third electromagnetic drive pair on the movable seat.

[0067] Similarly, during at least a portion of the process in which the first electromagnetic drive pair drives the movable seat to move, the third electromagnetic drive pair also drives the movable seat to move, enabling the electromagnetic drive assembly to provide a greater driving force to the movable seat and the lens.

[0068] In this way, the electromagnetic drive component provides a large driving force to the movable seat, so that even if the lens is a heavy lens such as a glass lens or a high-density lens, it can be dragged to the focus position quickly and accurately, so as to realize the camera module's fast focusing and improve the use effect of the electronic device's autofocus function.

[0069] In some feasible embodiments of the second aspect, before controlling the movement of the third electromagnetic drive pair to drive the movable seat, the process includes: controlling the movement of the first electromagnetic drive pair to drive the movable seat while simultaneously controlling the movement of the second electromagnetic drive pair to drive the movable seat. Controlling the movement of the third electromagnetic drive pair to drive the movable seat includes: controlling the movement of the first electromagnetic drive pair to drive the movable seat while simultaneously controlling the movement of the third electromagnetic drive pair to drive the movable seat.

[0070] In some examples, the third electromagnetic drive pair and the second electromagnetic drive pair can simultaneously provide driving force to the movable seat.

[0071] For example: First, the first electromagnetic drive pair and the second electromagnetic drive pair simultaneously provide driving force to the movable seat, while the third electromagnetic drive pair does not provide driving force to the movable seat; then, the first electromagnetic drive pair, the second electromagnetic drive pair, and the third electromagnetic drive pair simultaneously provide driving force to the movable seat; finally, the first electromagnetic drive pair and the third electromagnetic drive pair simultaneously provide driving force to the movable seat, while the second electromagnetic drive pair does not provide driving force to the movable seat.

[0072] In this example, the second and third electromagnetic drive pairs can also work in succession to increase the driving force of the movable seat. Specifically, during the phase where the first, second, and third electromagnetic drive pairs simultaneously provide driving force to the movable seat, the driving force from the second electromagnetic drive pair gradually weakens while the driving force from the third electromagnetic drive pair gradually strengthens. Therefore, the driving force on the movable seat is relatively balanced during this phase, facilitating control of its movement. In some cases, precise control of the current in the coils of the second and third electromagnetic drive pairs can stabilize the driving force on the movable seat.

[0073] In other examples, the third electromagnetic drive pair and the second electromagnetic drive pair may not simultaneously provide driving force to the movable seat.

[0074] For example: First, the first electromagnetic drive pair and the second electromagnetic drive pair simultaneously provide driving force to the movable seat, while the third electromagnetic drive pair does not provide driving force to the movable seat; then, the first electromagnetic drive pair provides driving force to the movable seat, while the second and third electromagnetic drive pairs do not provide driving force to the movable seat; finally, the first and third electromagnetic drive pairs simultaneously provide driving force to the movable seat, while the second electromagnetic drive pair does not provide driving force to the movable seat.

[0075] In this example, the second and third electromagnetic drive pairs can be relayed in segments to increase the driving force of the movable seat.

[0076] In this embodiment, compared to having only one electromagnetic drive opposing movable seat providing driving force, the driving power of the movable seat and the lens can be improved. Even if the lens is a glass lens or a high-density lens, which is relatively heavy, the lens can be dragged to the focus position quickly and accurately, so as to realize the camera module's fast focusing and improve the use effect of the electronic device's autofocus function.

[0077] In some feasible embodiments of the second aspect, the second electromagnetic drive pair includes a second coil and a second magnetic element, the second coil and the second magnetic element being spaced apart from each other. Controlling the movement of the movable seat by the third electromagnetic drive pair further includes stopping the supply of current to the second coil.

[0078] In this embodiment, when the second coil and the second magnetic component are not aligned and the second coil and the second magnetic component do not exert force on each other, the current supply to the second coil is stopped, which can improve the reliability of the drive motor control and reduce power consumption.

[0079] Thirdly, a camera module is provided. The camera module includes a lens, an image sensor, and a drive motor, the drive motor being used to drive the lens to move relative to the image sensor. The drive motor is any of the drive motors described in the first aspect.

[0080] The beneficial effects of the third aspect can be referenced from the beneficial effects of the drive motor in any of the first aspects, and will not be elaborated here.

[0081] Fourthly, an electronic device is provided. The electronic device includes a mid-frame, a back cover, and a camera module. The mid-frame includes a connected mid-plate and a frame. The frame surrounds the mid-plate and is connected to the edge of the mid-plate. The back cover includes a light-transmitting opening extending through it; the back cover is located on one side of the mid-frame and is connected to the frame. The camera module is a camera module of the third aspect. The lens of the camera module is positioned directly opposite at least a portion of the light-transmitting opening, and the lens can capture a view of the outside of the electronic device through the light-transmitting opening.

[0082] The beneficial effects of the fourth aspect can be referenced from the beneficial effects of the drive motor in any of the first aspects, and will not be elaborated here.

[0083] Fifthly, an electronic device is provided. The electronic device includes a memory and one or more processors. The memory is coupled to the processors. Computer program code, including computer instructions, is stored in the memory. When the computer instructions are executed by the processor, the electronic device performs the methods described in any of the second aspects.

[0084] A sixth aspect provides a computer-readable storage medium. The computer-readable storage medium includes computer instructions that, when executed on an electronic device, cause the electronic device to perform the method as described in any of the second aspects.

[0085] In a seventh aspect, a computer program product is provided. When the computer program product is run on an electronic device, it causes the electronic device to perform the method as described in any of the second aspects.

[0086] The beneficial effects of aspects five through seven can be referenced from the beneficial effects of the drive motor control method in any of the aspects two, and will not be elaborated here. Attached Figure Description

[0087] Figure 1 A perspective view of an electronic device provided for some embodiments of this application;

[0088] Figure 2 An exploded view of an electronic device provided in some embodiments of this application;

[0089] Figure 3 Schematic diagrams of the structure of a camera module provided for some embodiments of this application;

[0090] Figure 4 Schematic diagrams of the structure of a camera module provided for other embodiments of this application;

[0091] Figure 5 A three-dimensional structural schematic diagram of a drive motor provided for some embodiments of this application;

[0092] Figure 6 Exploded view of the structure of the drive motor provided for some embodiments of this application;

[0093] Figure 7 for Figure 5 A schematic diagram of the structure behind the concealed cover of the drive motor;

[0094] Figure 8 for Figure 5 Another schematic diagram of the structure after the central drive motor is hidden behind the cover;

[0095] Figure 9 This is a schematic diagram of the structure of the first electromagnetic drive centering magnetic component and coil;

[0096] Figure 10 for Figure 9 The diagram shows an electromagnetic drive centering coil providing driving force to a magnetic component.

[0097] Figure 11 for Figure 9 Another schematic diagram showing the electromagnetic drive centering coil providing driving force to the magnetic component;

[0098] Figure 12 for Figure 8 A structural schematic diagram from another perspective of the structure shown;

[0099] Figure 13 Top view of the structure behind the drive motor concealed by the cover, provided for some embodiments of this application;

[0100] Figure 14 for Figure 12 A cross-sectional view formed along line A-A';

[0101] Figure 15 The graph shows the driving force acting on the movable seat in the first, second, and third stages.

[0102] Figure 16 for Figure 12 Another sectional view formed along line A-A';

[0103] Figure 17 for Figure 16 A front view of the structure behind the hidden cover of the corresponding drive motor;

[0104] Figure 18 The graph shows the driving force experienced by the active seat in the fourth, fifth, and sixth stages.

[0105] Figure 19A current control framework diagram of a drive motor provided for some embodiments of this application;

[0106] Figure 20 A current control framework diagram for a drive motor provided for some other embodiments of this application. Detailed Implementation

[0107] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application are within the scope of protection of this application.

[0108] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0109] Furthermore, in this application, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and may change accordingly depending on the orientation of the components in the accompanying drawings.

[0110] In describing some embodiments, the terms "connected," "linked," and their derivative expressions may be used. For example, the term "connected" may be used to indicate that two or more components are in direct or indirect physical contact with each other. For example, "A and B are connected" can mean that A and B are connected directly, or it can mean that A and B are connected through other components. Furthermore, the term "coupled" can refer to an electrical connection that enables signal transmission; coupling can indicate direct coupling or indirect coupling.

[0111] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0112] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0113] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0114] For ease of understanding, the technical terms used in this application will be explained and described below.

[0115] Lens: A lens is a component that uses the principle of refraction to allow light from a scene to pass through it and form a clear image on the focal plane. A lens may contain one or more lenses, which can be concave lenses, convex lenses, or plane mirrors.

[0116] Optical axis: The direction in which light rays travel through an optical system, referenced to the principal ray at the center of the field of view. For symmetrical transmission systems, it generally coincides with the rotation center line of the optical system. For off-axis and reflective systems, the optical axis may appear as a broken line.

[0117] Object side and image side: The object side is the side where the object is located, and the image side is the side where the image of the object is located, with the lens or lens as the boundary.

[0118] Focusing: Focusing, also called adjusting the light or focusing, is the process of changing the object distance and image distance through the focusing mechanism in a camera to make the subject appear sharp. Digital cameras typically have several focusing modes, including autofocus, manual focus, or multiple focus modes.

[0119] Autofocus: Autofocus is a method that uses the principle of light reflection from an object. The reflected light is received by the sensor on the camera (such as a charge-coupled device (CCD)). The processor calculates and processes the light to drive the focusing device to focus.

[0120] Drive motor: A drive motor is a device that converts electrical energy into mechanical energy. It utilizes the magnetic field of a permanent magnet and the magnetic field generated by a conductor in a current-carrying coil to create motion on the magnetic poles, thereby causing the magnetic poles to drive the lens in a linear or limited-angle motion. Drive motors are mainly used in scenarios involving short-stroke, high-speed, and high-acceleration motion, and are suitable for moving objects in confined spaces.

[0121] In camera modules, drive motors are typically used for functions such as autofocus and optical image stabilization. In this application, the drive motor is primarily used for autofocus.

[0122] In recent years, with the development of optical imaging technology, people have increasingly higher requirements for the camera functions of portable electronic devices such as mobile phones. They not only require the camera modules of electronic devices to achieve functions such as background blur and clear night shooting, but also require the camera modules of electronic devices to achieve telephoto shooting and macro shooting.

[0123] When taking telephoto shots with a mobile phone, the object being photographed is very far away from the phone. The object is usually a large object, such as a landscape or building, which can easily fill the entire frame. Telephoto shots typically have a shorter focal length, therefore the drive motor has a shorter travel distance over the lens.

[0124] Macro photography refers to photographing objects at a relatively close shooting distance with high magnification. It is often used to photograph very small objects, such as flowers and insects. Macro photography usually requires shooting objects at close range. The closer the object is to the lens, the longer the travel of the drive motor needs to control the lens.

[0125] In order for the same camera module to perform both telephoto and macro photography, the drive motor in the camera module needs to have a long dragging range (greater than or equal to 2mm) on the lens, which places high demands on the performance of the drive motor.

[0126] Furthermore, to meet users' ever-increasing demands for image clarity, glass lenses or lenses with increasingly higher density are being used for imaging. However, glass lenses or high-density lenses are heavier, posing a significant challenge to the drive motor's ability to move the lens. Currently, due to insufficient drive motor capability in moving the lens, the lens movement speed is often slow or it cannot accurately move the lens to the focus position, resulting in inaccurate focusing and poor performance of the autofocus function in electronic devices.

[0127] Based on this, embodiments of this application provide a drive motor and its control method, a camera module, and an electronic device. While one drive mechanism drives the lens to move, at least one other drive mechanism also drives the lens to move. This ensures that the lens is powered by at least two drive mechanisms during movement, meeting the requirement of the drive motor to drag the lens over a long distance. It also allows heavier lenses to respond quickly to focusing movements and ensures the lens is accurately moved to the focusing position, thereby improving the effectiveness of the electronic device's autofocus function.

[0128] The electronic devices provided in the embodiments of this application can be electronic devices assembled from multiple components. Electronic devices may include, but are not limited to, mobile phones, tablets, laptops, handheld computers, netbooks, personal digital assistants (PDAs), wearable electronic devices (smartwatches, smart bracelets, smart rings, etc.), virtual reality devices, etc., and the embodiments of this application do not limit this. The following description uses a mobile phone as an example, but it is not limited to mobile phones.

[0129] Please see Figure 1 , Figure 1 A perspective view of an electronic device provided in some embodiments of this application is shown. As can be seen from the above, in this embodiment, the electronic device 100 is a mobile phone, and the electronic device 100 can have an approximately rectangular plate-like structure.

[0130] For ease of description below, an XYZ coordinate system is established, defining the width direction of electronic device 100 as the X-axis, the length direction as the Y-axis, and the thickness direction as the Z-axis. It is understood that... Figure 1 The electronic device 100 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 1 Restrictions.

[0131] Please see Figure 2 , Figure 2 An exploded view of an electronic device provided in some embodiments of this application is shown. The electronic device 100 may include a screen 10, a back cover 20, a mid-frame 30, and a camera module 40. The screen 10 can be used to display images, videos, etc. The screen 10 may include a light-transmitting cover 11 and a display screen 12. The light-transmitting cover 11 and the display screen 12 are stacked together. The light-transmitting cover 11 mainly serves to protect the display screen 12 and prevent dust. The material of the light-transmitting cover 11 includes, but is not limited to, glass. The display screen 12 can be a flexible display screen or a rigid display screen.

[0132] The back cover 20 can be used to protect the internal electronic components of the electronic device 100. The back cover 20 can be located on the side of the display screen 12 away from the light-transmitting cover 11. The back cover 20 can have a light-transmitting opening 21 that passes through the back cover 20. The shape of the light-transmitting opening 21 can be circular, rectangular, etc., and is not limited here.

[0133] The middle frame 30 may include a connected frame 31 and a middle plate 32. The frame 31 may be located between the rear cover 20 and the light-transmitting cover 11, and the frame 31 may be fixedly connected to the rear cover 20. For example, the frame 31 may be fixedly connected to the rear cover 20 by adhesive. The light-transmitting cover 11 may be fixedly fixed to the frame 31 by adhesive. The middle plate 32 is connected to the inner surface of the frame 31 to achieve the installation and fixation of the middle plate 32. For example, the middle plate 32 and the frame 31 may be made of metal, and the middle plate 32 may be fixed to the frame 31 by welding. The middle plate 32 may also be integrally formed with the frame 31. The middle plate 32 serves as the structural "skeleton" of the electronic device 100.

[0134] The camera module 40 can be used to take photos / videos. The camera module 40 can be fixedly connected to the middle plate 32 by means of threaded connection, snap-fit, welding, etc. For example, the light inlet of the camera module 40 can be connected to at least part of the light transmission port 21, so as to capture the light outside the electronic device through the light transmission port 21 and realize the framing of the external environment of the electronic device.

[0135] Figure 3 The present application shows a schematic diagram of the structure of a camera module provided in some embodiments; Figure 4 A schematic diagram of the structure of a camera module provided in some other embodiments of this application is shown.

[0136] like Figure 3 As shown, the camera module 40 may include a lens 41 and a drive motor 42. The drive motor 42 is used to drive the lens 41 to move in the optical axis G direction to achieve optical focusing. It should be noted that the G direction can be... Figure 1 The X-axis direction or the G-axis direction can also be... Figure 1 The Y-axis direction, or the G direction, can also be any other direction within the plane containing the X-axis and Y-axis; no limitation is made here.

[0137] Lens 41 may include one lens or multiple lenses, without limitation herein. Lens may include convex lens, concave lens or plane mirror. At least part of lens 41 may be positioned directly opposite to the light-transmitting opening 21 on the rear cover 20, so that light enters lens 41 through the light-transmitting opening 21.

[0138] like Figure 3As shown, the camera module 40 may further include an image sensor 43. The image sensor 43 may be located on the image side of the lens 41. The image sensor 43 may be a complementary metal-oxide-semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor. The image sensor 43 can be used to perform photoelectric conversion of light signals and analog-to-digital (A / D) conversion, thereby outputting image data for display on a screen.

[0139] like Figure 4 As shown, the camera module 40 may further include a reflective element 44. The reflective element 44 may be located on the object side of the lens 41. The reflective element 44 may be a triangular prism or a mirror. The reflective element 44 may be used to change the direction of light propagation, thereby extending the path of light propagation.

[0140] For example, such as Figure 4 As shown, camera module 40 can be a periscope camera.

[0141] Understandable, Figure 3 and Figure 4 The images only schematically illustrate some of the components included in the camera module 40. The actual shape, size, position, and construction of these components are not subject to change. Figure 3 and Figure 4 Limitations. For example, camera module 40 may also include filters to filter out light of specific colors, thereby improving the quality of the image formed by image sensor 43.

[0142] Figure 5 A three-dimensional structural schematic diagram of a drive motor provided in some embodiments of this application is shown; Figure 6 An exploded view of the structure of a drive motor provided in some embodiments of this application is shown; Figure 7 It shows Figure 5 A schematic diagram of the structure behind the concealed cover of the drive motor; Figure 8 It shows Figure 5 Another schematic diagram of the structure after the drive motor is hidden in the cover.

[0143] like Figure 5 and Figure 6 As shown, the drive motor 42 may include a housing 421, a movable seat 422, and an electromagnetic drive assembly 423. The housing 421 has a storage cavity inside, and the lens 41, the movable seat 422, and the electromagnetic drive assembly 423 are all located inside the storage cavity. The electromagnetic drive assembly 423 can drive the movable seat 422 to move along the optical axis G within the storage cavity.

[0144] In some examples, the cover 421 can be a single, integral structure. In other examples, the cover 421 can be assembled from multiple components. For example, the cover 421 may include a cover body 4211 and a cover 4212, which together form a storage cavity.

[0145] The cover 421 may include a first cover wall 421a and a second cover wall (not shown in the figure) disposed opposite to each other along the optical axis G. The first cover wall 421a may be located on the object side of the second cover wall, and the second cover wall may be located on the image side of the first cover wall 421a. The first cover wall 421a has a first opening K1, and the second cover wall has a second opening. Light can pass through the first opening K1, through the lens 41, and through the second opening in sequence before reaching the image sensor 43.

[0146] like Figure 6 and Figure 7 As shown, the movable base 422 may include a body portion 4221. The body portion 4221 is used to fix the lens ( Figure 6 and Figure 7 (Not shown in the image). For example, the body part 4221 is fixedly connected to the lens, such that the lens 41 is set in an orientation perpendicular to the optical axis. The movable seat 422 can move within the housing 421 along the direction of the optical axis G, so that the body part 4221 of the movable seat 422 can drive the lens to move along the direction of the optical axis G.

[0147] The electromagnetic drive assembly 423 is used to provide a driving force to the movable seat 422 to move along the optical axis G. For example... Figure 6 and Figure 7 As shown, the electromagnetic drive assembly 423 may include at least two electromagnetic drive pairs. Each electromagnetic drive pair is located within the receiving cavity of the housing 421. Each electromagnetic drive pair is connected to the movable base 422.

[0148] For example, such as Figure 7 As shown, the electromagnetic drive assembly 423 may include two electromagnetic drive pairs (a first electromagnetic drive pair 4231 and a second electromagnetic drive pair 4232). The movable seat 422 includes a first sidewall 422a and a second sidewall 422b, with the edge of the first sidewall 422a connected to the edge of the second sidewall 422b. Of the two electromagnetic drive pairs, the first electromagnetic drive pair 4231 is connected to the first sidewall 422a, and the second electromagnetic drive pair 4232 is connected to the second sidewall 422b.

[0149] The included angle formed by the first sidewall 422a and the second sidewall 422b can be approximately 90°. Of course, the included angle formed by the first sidewall 422a and the second sidewall 422b can also be other angles, and the embodiments of this application do not limit this.

[0150] For example, such as Figure 8 As shown, the electromagnetic drive assembly 423 may include three electromagnetic drive pairs (a first electromagnetic drive pair 4231, a second electromagnetic drive pair 4232, and a third electromagnetic drive pair 4233). The movable seat 422 includes a first sidewall 422a, a second sidewall 422b, and a third sidewall 422c. One edge of the first sidewall 422a is connected to the edge of the second sidewall 422b, and the other edge of the first sidewall 422a is connected to the third sidewall 422c. Of the three electromagnetic drive pairs, the first electromagnetic drive pair 4231 is connected to the first sidewall 422a, the second electromagnetic drive pair 4232 is connected to the second sidewall 422b, and the third electromagnetic drive pair 4233 is connected to the third sidewall 422c.

[0151] The second sidewall 422b and the third sidewall 422c can be arranged parallel to each other and opposite to each other. Of course, the second sidewall 422b can also be inclined relative to the third sidewall 422c, and the embodiments of this application do not limit this.

[0152] For ease of understanding, the following will be... Figure 8 The electromagnetic drive assembly 423 shown is illustrated using a scheme comprising three electromagnetic drive pairs as an example. However, it should not be considered as... Figure 8 As a limitation, the electromagnetic drive assembly 423 may include fewer electromagnetic drive pairs (e.g. Figure 7 (as shown in the diagram), or more electromagnetic drive pairs.

[0153] Each electromagnetic drive pair may include a magnetic component and a coil. The connection between the electromagnetic drive pair and the movable base 422 can be such that the magnetic component is connected to the movable base 422 and the coil is connected to the inner surface of the cover 421; alternatively, the coil can be connected to the movable base 422 and the magnetic component to the inner surface of the cover 421. For ease of understanding, the following explanation will use the example of the magnetic component being connected to the movable base 422 and the coil being connected to the inner surface of the cover 421.

[0154] In some examples, the first electromagnetic drive pair 4231 may include a magnetic element M1 and a coil C1. The magnetic element M1 may be glued to the first sidewall 422a, and the coil C1 may also be glued to the inner wall of the housing 421, so that the magnetic element M1 and the coil C1 are arranged opposite to each other.

[0155] In other examples, such as Figure 6As shown, the first sidewall 422a can also have a first receiving groove A1, and the magnetic component M1 can be installed in the first receiving groove A1. The depth of the first receiving groove A1 can be approximately equal to the thickness of the magnetic component M1, so that after the magnetic component M1 is placed in the first receiving groove A1, the surface of the magnetic component M1 near the coil C1 can be approximately flush with the first sidewall 422a. This way, housing the magnetic component M1 in the movable seat 422 prevents the magnetic component M1 from protruding from the movable seat 422 and hindering the movement of the movable seat 422 in the optical axis G direction. Simultaneously, housing the magnetic component M1 in the movable seat 422 facilitates the miniaturization design of the drive motor.

[0156] Correspondingly, a first receiving groove (not shown) can also be formed on the inner surface of the cover 421, and the coil C1 can be installed in the first receiving groove. The depth of the first receiving groove can be approximately equal to the thickness of the coil C1, so that after the coil C1 is placed in the first receiving groove, the surface of the coil C1 near the magnetic component M1 can be approximately flush with the inner surface of the cover 421. This way, storing the coil C1 within the cover 421 prevents the coil C1 from protruding from the inner surface of the cover 421 and hindering the movement of the movable seat 422 in the optical axis G direction. Simultaneously, storing the coil C1 within the cover 421 facilitates the miniaturization design of the drive motor.

[0157] The second electromagnetic drive pair 4232 may include a magnetic element M2 and a coil C2. The third electromagnetic drive pair 4233 may include a magnetic element M3 and a coil C3. The structure of the second electromagnetic drive pair 4232 and the third electromagnetic drive pair 4233, as well as their installation method with the movable seat 422 and the cover 421, can be referred to the structure of the first electromagnetic drive pair 4231, as well as their installation method with the movable seat 422 and the cover 421, and will not be described again here.

[0158] Please continue reading. Figure 6 The drive motor 42 may also include multiple yokes. The number of yokes may be equal to the number of magnetic elements. Each yoke may be disposed between the movable seat 422 and the magnetic element. Exemplarily, the drive motor 42 may include a first yoke 4241, a second yoke 4242, and a third yoke 4243. The first yoke 4241 is located between the movable seat 422 and the magnetic element M1, the second yoke 4242 is located between the movable seat 422 and the magnetic element M2, and the third yoke 4243 is located between the movable seat 422 and the magnetic element M3.

[0159] The first magnetic yoke 4241 can be used to reduce the influence of the magnetic field generated by the magnetic component M1 on one side of the movable seat 422, thereby blocking magnetism. In addition, the first magnetic yoke 4241 can also enhance the influence of the magnetic field generated by the magnetic component M1 on one side of the coil C1, thereby increasing the interaction force between the magnetic component M1 and the coil C1.

[0160] The effects of the second magnetic yoke 4242 on magnetic component M2 and the effects of the third magnetic yoke 4243 on magnetic component M3 can be referenced from the effects of the first magnetic yoke 4241 on magnetic component M1, and will not be elaborated here.

[0161] The explanation will continue using the magnetic component M1 and coil C1 in the first electromagnetic drive 4231 as an example. Figure 9 A schematic diagram of the structure of the magnetic component M1 and the coil C1 in the first electromagnetic drive pair 4231 is shown; Figure 10 It shows Figure 9 The diagram shown illustrates how the electromagnetic drive system in 4231 provides driving force from coil C1 to magnetic component M1. Figure 11 It shows Figure 9 The diagram shows another schematic of the electromagnetic drive system 4231 in which coil C1 provides driving force to magnetic component M1.

[0162] like Figure 9 As shown, the magnetic component M1 may include two magnetic poles with opposite polarities (N pole and S pole). Exemplarily, the magnetic component M1 may include an N pole magnet and an S pole magnet. In some examples, the N pole magnet is located on the object side of the S pole magnet, and the S pole magnet is located on the image side of the N pole magnet. In other examples, the S pole magnet is located on the object side of the N pole magnet, and the N pole magnet is located on the image side of the S pole magnet. The embodiments of this application will subsequently be described with the N pole magnet located on the object side of the S pole magnet and the S pole magnet located on the image side of the N pole magnet.

[0163] The coil C1 is rectangular and includes a first line segment C11 and a second line segment C12 that are spaced apart parallel to the optical axis G, a third line segment C13 that connects the first end of the first line segment C11 to the first end of the second line segment C12, and a fourth line segment C14 that connects the second end of the first line segment C11 to the second end of the second line segment C12.

[0164] A single line segment (first line segment C11, second line segment C12, third line segment C13, or fourth line segment C14) may contain multiple conductors. Furthermore, the current flows in the same direction in all the conductors within the same line segment.

[0165] The following details the forces generated on the magnetic component M1 and the movable seat 422 by applying different currents to the coil C1 in the first electromagnetic drive.

[0166] like Figure 10As shown, when a counter-clockwise current flows through coil C1, the current in the first segment C11 flows from right to left (from the third segment C13 to the fourth segment C14), and the current in the second segment C12 flows from left to right (from the fourth segment C14 to the third segment C13). The N pole magnet is directly opposite the first segment C11, and the current flowing from right to left on the first segment C11 exerts an upward Lorentz force F1 on the N pole magnet; the S pole magnet is directly opposite the second segment C12, and the current flowing from left to right on the second segment C12 exerts an upward Lorentz force F2 on the S pole magnet. Thus, the magnetic component M1 as a whole experiences an upward force (F1 + F2). Since the magnetic component M1 is fixed to the movable base 422, this force serves as the driving force for the movable base 422 to move from the image side to the object side along the optical axis G.

[0167] like Figure 11 As shown, when a clockwise current flows through coil C1, the current in the first segment C11 flows from left to right (from the fourth segment C14 to the third segment C13), and the current in the second segment C12 flows from right to left (from the third segment C13 to the fourth segment C14). The N pole magnet is directly opposite the first segment C11, and the current flowing from left to right on the first segment C11 exerts a downward Lorentz force F3 on the N pole magnet; the S pole magnet is directly opposite the second segment C12, and the current flowing from right to left on the second segment C12 exerts a downward Lorentz force F4 on the S pole magnet. Thus, the magnetic component M1 as a whole experiences a downward force (F3 + F4). Since the magnetic component M1 is fixed to the movable base 422, this force serves as the driving force for the movable base 422 to move from the object side to the image side along the optical axis G.

[0168] As can be seen, by passing current (e.g., direct current) through coil C1, an interaction force can be generated between coil C1 and magnetic component M1. This force can then act as a driving force to move the movable seat 422 relative to the cover 421 along the optical axis. Furthermore, by changing the direction of the current in coil C1, the direction of the force exerted by magnetic component M1 can be changed, thereby controlling the direction of movement of the movable seat 422.

[0169] Furthermore, the magnitude of the Lorentz force mentioned above is positively correlated with the current value in coil C1. Understandably, the larger the DC current flowing through coil C1, the larger the Lorentz force generated by the magnetic component M1, and the greater the driving force on the movable seat 422; conversely, the smaller the DC current flowing through coil C1, the smaller the Lorentz force generated by the magnetic component M1, and the smaller the driving force on the movable seat 422.

[0170] Similarly, the magnitude of the Lorentz force is positively correlated with the magnetic flux density of the magnetic field generated by the magnetic component M1. Understandably, the greater the magnetic flux density of the magnetic field generated by the magnetic component M1, the greater the Lorentz force formed by the magnetic component M1, and the greater the driving force on the movable seat 422; conversely, the smaller the magnetic flux density of the magnetic field generated by the magnetic component M1, the smaller the Lorentz force formed by the magnetic component M1, and the smaller the driving force on the movable seat 422.

[0171] The force exerted by the second electromagnetic drive on the magnetic component M2 and the movable seat 422 by the coil C2 in 4232, and the force exerted by the third electromagnetic drive on the magnetic component M3 and the movable seat 422 by the coil C3 in 4233, can be referred to the force exerted by the first electromagnetic drive on the magnetic component M1 and the movable seat 422 by the coil C1 in 4231, and will not be elaborated here.

[0172] In the embodiments of this application, the electromagnetic drive assembly 423 may include at least two electromagnetic drive pairs, and each electromagnetic drive pair can provide a driving force to the movable seat 422 in the direction of the optical axis. Therefore, the electromagnetic drive assembly 423 can provide a large driving force to the movable seat 422 and the lens 41. In this way, the electromagnetic drive assembly 423 provides a large driving force to the movable seat 422, so even if the lens 41 is a heavy lens such as a glass lens or a high-density lens, it can quickly and accurately drag the lens to the focus position, realize the camera module to focus quickly, and improve the use effect of the automatic focus function of electronic devices.

[0173] Figure 12 It shows Figure 8 A schematic diagram of the structure from another perspective.

[0174] To limit the movement of the movable seat 422 along the optical axis G, the drive motor 42 may further include a guide rod 425, which can extend along the optical axis G. Correspondingly, the movable seat 422 may also include a connecting portion 4222, which is connected to the main body portion 4221. The connecting portion 4222 can be fixedly connected to the main body portion 4221 by adhesive, or the connecting portion 4222 and the main body portion 4221 can be an integrally molded structure.

[0175] In some examples, the main body 4221 and the connecting part 4222 together constitute an eccentric cantilever structure. Understandably, the connecting part 4222 can serve as a bracket connected to the guide rod 425, and the main body 4221 can be a beam extending perpendicular to the guide rod 425. The connecting part 4222 can move along the extending direction of the guide rod 425, causing the main body 4221 and the lens 41 on the main body 4221 to move synchronously.

[0176] Compared to a design where supports are placed at both ends of the movable seat to support the movement of the central beam along the extension direction of the guide rod,Figure 12 The movable base 422 shown adopts an eccentric cantilever structure design, which eliminates the need for a bracket and reduces the required volume of the movable base 422, thereby facilitating the slimmer design of the drive motor 42, camera module 40, and electronic device 100. In addition, the reduced size of the drive motor 42 can also improve the utilization rate of the internal space of the camera module 40 and electronic device 100.

[0177] like Figure 12 As shown, the dimension of the connecting part 4222 in the optical axis G direction is larger than the dimension of the body part 4221 in the optical axis G direction.

[0178] The connecting part 4222 may have a through hole K2 passing through it. The guide rod 425 passes through the through hole K2, so that when the movable seat 422 moves, the guide rod 425 will restrict the movement of the connecting part 4222 along the extension direction of the guide rod 425 (i.e., the direction of the optical axis G) through the through hole K2, thereby restricting the movement of the main body 4221 and the lens 41 fixed to the main body 4221 along the direction of the optical axis.

[0179] The guide rod 425 can be a single rod, for example, a long, narrow rod with a rectangular cross-section. Alternatively, there can be multiple guide rods 425, for example... Figure 12 As shown, there are two guide rods 425, each with a circular cross-section. Of course, in other examples, the cross-section of the guide rod 425 can be other shapes, which are not limited here.

[0180] It should be noted that each guide rod 425 passes through a through hole K2, and different guide rods 425 pass through different through holes K2. Therefore, the number of through holes K2 can be equal to the number of guide rods 425. The opening area of ​​the through hole K2 can be slightly larger than the cross-sectional area of ​​the guide rod 425.

[0181] In addition, for the installation of guide rods 425, the first cover wall 421a is provided with a first limiting hole, and the second cover wall is provided with a second limiting hole. The number of first limiting holes, the number of second limiting holes, and the number of guide rods 425 are equal. One guide rod 425 passes through one first limiting hole, one through hole K2, and one second limiting hole in sequence.

[0182] Figure 13 A top view of the structure of the drive motor hidden behind the cover provided in some embodiments of this application is shown.

[0183] Taking two guide rods 425 as an example, and the connecting part 4222 having two corresponding through holes K2, Figure 13 A schematic diagram of two vias is shown. (For example...) Figure 13As shown, one via K21 may include a “V” shaped contact surface for contacting the guide rod 425 within the via K21; the cross-sectional shape of the other via K22 may include a planar contact surface (e.g., a “|” shaped contact surface) for contacting the guide rod 425 within the via K22.

[0184] The V-shaped contact surface and the straight-line contact surface are both located near the main body 4221 in the via K2. This is because the coil C1 in the first electromagnetic drive pair 4231 will generate a large attraction force on the magnetic component M1, causing the guide rod 425 in the via K2 to contact the part of the via K2 near the main body 4221, while not contacting other parts of the via K2.

[0185] In this embodiment, the via K21 maintains two contact points with the guide rod 425 using its V-shaped contact surface, and can prevent the movable seat 422 from moving in the straight line direction of the two contact points, thus limiting the movement of the movable seat 422. The straight line direction of the two contact points on the V-shaped contact surface in the through hole K22 is parallel to that of the straight line direction on the V-shaped contact surface. Since the V-shaped contact surface restricts the movement of the movable seat 422, the guide rod 425 can only contact the straight line contact surface of the through hole K22, maintaining one contact point. In this way, there are always three contact points between the movable seat 422 and the guide rod 425. Since the frictional resistance of each contact point between the movable seat 422 and the guide rod 425 is fixed, by limiting the contact points between the movable seat 422 and the guide rod 425 to three constant points, stable frictional resistance between the movable seat 422 and the guide rod 425 can be achieved, improving the consistency of the drive motor 42 in controlling the friction of the movable seat 422, thereby improving the accuracy of the camera module's autofocus.

[0186] Furthermore, such as Figure 13 As shown, the drive motor 42 may also include a magnetic chuck 426. The magnetic chuck 426 is located on the side of the two guide rods 425 away from the movable seat 422.

[0187] The magnetic chuck 426 is used to generate an attractive force on the magnetic components (e.g., magnetic components M1, M2, and / or M3) on the movable seat 422, so that the movable seat 422 has an attractive force close to the magnetic chuck 426. In this way, it can be further ensured that the guide rod 425 in the through hole K2 is in contact with the part of the through hole K2 near the body part 4221, while not in contact with other parts of the through hole K2, thereby improving the reliability of high-precision control of the drive motor.

[0188] For example, the number of magnetic 426 can be two, with one magnetic 426 facing one through hole K2 and the other magnetic 426 facing another through hole K2.

[0189] In some embodiments, such as Figure 12As shown, the volume of the first electromagnetic drive pair 4231 connected to the first sidewall 422a can be larger than the volume of the second electromagnetic drive pair 4232 connected to the second sidewall 422b. Furthermore, the volume of the first electromagnetic drive pair 4231 can be larger than the volume of the third electromagnetic drive pair 4233 connected to the third sidewall 422c.

[0190] For example, the first sidewall 422a can be the outer surface of the connecting portion 4222 away from the body portion 4221. The dimension of the connecting portion 4222 in the optical axis G direction is larger than the dimension of the body portion 4221 in the optical axis direction. The first electromagnetic drive pair 4231 is disposed on the connecting portion 4222, and the second electromagnetic drive pair 4232 and the third electromagnetic drive pair 4233 are disposed on the body portion 4221.

[0191] In some examples, the volume of the first electromagnetic drive pair 4231 is larger than the volume of the second electromagnetic drive pair 4232, which may include the volume of the magnetic element M1 in the first electromagnetic drive pair 4231 being larger than the volume of the magnetic element M2 in the second electromagnetic drive pair 4232.

[0192] The force between the electromagnetic drive coil and the magnetic component is positively correlated with the magnetic flux density of the magnetic field generated by the magnetic component. The volume of the magnetic component is also positively correlated with the magnetic flux density of the magnetic field it generates. Understandably, the larger the volume of the magnetic component, the greater the force between it and the coil, and the greater the driving force provided by the electromagnetic drive to the movable seat; conversely, the smaller the volume of the magnetic component, the smaller the force between it and the coil, and the smaller the driving force provided by the electromagnetic drive to the movable seat.

[0193] Therefore, the volume of magnetic component M1 is larger than that of magnetic component M2, which makes the driving force provided by the first electromagnetic drive pair 4231 to the movable seat 422 greater than the driving force provided by the second electromagnetic drive pair 4232 to the movable seat 422.

[0194] Thus, it can be assumed that the driving force for the movement of the movable seat 422 in the optical axis G direction is mainly provided by the first electromagnetic drive pair 4231; the secondary driving force for the movement of the movable seat 422 in the optical axis G direction includes the driving force provided to the movable seat 422 by the second electromagnetic drive pair 4232. It is evident that by designing different volumes of the magnetic components in different electromagnetic drive pairs, the driving force provided to the movable seat by each electromagnetic drive pair can be flexibly adjusted, helping the drive motor 42 to be applied to a wider range of scenarios.

[0195] For example, the first electromagnetic drive pair 4231 can continuously provide driving force throughout the entire stroke of the movable seat 422, while the second electromagnetic drive pair 4232, as an assist structure, provides driving force during at least a partial formation of the movable seat 422. Compared to having only one electromagnetic drive pair providing driving force, the electromagnetic drive assembly of this application provides a greater driving force to the movable seat, enabling the lens to be dragged to the focusing position quickly and accurately, achieving rapid focusing of the camera module, and improving the usability of the electronic device's autofocus function.

[0196] In other examples, the volume of the first electromagnetic drive pair 4231 is larger than the volume of the second electromagnetic drive pair 4232, which may include the volume of coil C1 in the first electromagnetic drive pair 4231 being larger than the volume of coil C2 in the second electromagnetic drive pair 4232. Thus, the range by which coil C1 provides driving force to the magnetic component M1 on the movable base is greater than the range by which coil C2 provides driving force to the magnetic component M2 on the movable base.

[0197] The volume of the first coil is larger than that of the second coil, which helps the first coil to provide a greater range of driving force to the magnetic component on the movable base than the second coil can provide to the magnetic component on the movable base.

[0198] Therefore, the first electromagnetic drive pair 4231, which provides a larger range of driving force to the movable seat 422, can be used as the primary driving force source for the movement of the movable seat 422 in the camera module 40. The second electromagnetic drive pair 4232, which provides a smaller range of driving force to the movable seat 422, can be used as a secondary driving force source for the movement of the movable seat 422 in the camera module 40. This allows the second electromagnetic drive pair 4232 to be designed to increase the driving force on the movable seat 422 during strokes requiring a larger driving force, without needing to design the range of driving force provided by the second electromagnetic drive pair 4232 to be very large, thus avoiding material waste. Furthermore, by using different ranges of driving force provided by different electromagnetic drive pairs, the electromagnetic drive assembly can be flexibly designed to provide different ranges of driving force to the movable seat, improving the design flexibility and versatility of the electromagnetic drive assembly in driving the movement of the movable seat.

[0199] In some examples, the movable seat 422 can be driven by the first electromagnetic drive pair 4231, the second electromagnetic drive pair 4232, and the third electromagnetic drive pair 4233 simultaneously throughout its entire stroke as it moves along the optical axis G within the housing 421.

[0200] In other examples, coil C1 includes a first surface B1 and a second surface B2 disposed opposite to each other along the optical axis G. The first surface B1 may be a surface near the object side, and the second surface B2 may be a surface near the image side. Similarly, coil C2 includes a third surface B3 and a fourth surface B4 disposed opposite to each other along the optical axis G. The third surface B3 may be a surface near the object side, and the fourth surface B4 may be a surface near the image side.

[0201] In the direction of the optical axis G, the size of coil C1 (the distance between the first surface B1 and the second surface B2) is greater than the size of coil C2 (the distance between the third surface B3 and the fourth surface B4). Understandably, the travel distance by which the first electromagnetic drive pair 4231 drives the movable seat 422 to move in the direction of the optical axis G is greater than the travel distance by which the second electromagnetic drive pair 4232 drives the movable seat 422 to move in the direction of the optical axis G.

[0202] In this example, the first electromagnetic drive pair 4231, which provides a larger range of driving force to the movable seat, can be used as the primary driving force source for the movement of the movable seat 422 in the camera module. The second electromagnetic drive pair 4232, which provides a smaller range of driving force to the movable seat 422, can be used as a secondary driving force source for the movement of the movable seat 422 in the camera module. This allows the second electromagnetic drive pair 4232 to be designed to increase the driving force on the movable seat during strokes requiring a larger driving force, without needing to design the range of driving force provided by the second electromagnetic drive pair 4232 to be very large, thus avoiding material waste. Furthermore, by using different ranges of driving force provided by different electromagnetic drive pairs, the electromagnetic drive assembly can be flexibly designed to provide different ranges of driving force to the movable seat, improving the design flexibility and versatility of the electromagnetic drive assembly for driving the movement of the movable seat.

[0203] For example, during the entire stroke of the movable seat 422 moving along the optical axis G within the housing 421, a first electromagnetic drive unit 4231 can provide driving force throughout the entire stroke, a second electromagnetic drive unit 4232 can provide driving force during the first stroke, and a third electromagnetic drive unit 4232 can provide driving force during the second stroke. The first and second strokes are both parts of the entire stroke, and the first and second strokes may at least partially overlap, or may not overlap; this is not limited here.

[0204] The plane containing the third surface B3 can be located between the plane containing the first surface B1 and the plane containing the second surface B2.

[0205] For example, the plane containing the third surface B3 and the plane containing the fourth surface B4 are both located between the plane containing the first surface B1 and the plane containing the second surface B2. Thus, the range within which the second electromagnetic drive pair 4232 provides driving force to the movable seat 422 is located within the range within which the first electromagnetic drive pair 4231 provides driving force to the movable seat 422. The range within which the second electromagnetic drive pair 4232 provides driving force to the movable seat 422 is a portion of the range within which the first electromagnetic drive pair 4231 provides driving force to the movable seat 422.

[0206] Understandably, during the entire process of the second electromagnetic drive pair 4232 providing driving force to the movable seat 422, the first electromagnetic drive pair 4231 also provides driving force to the movable seat 422. During the period when the second electromagnetic drive pair 4232 provides driving force to the movable seat 422, both electromagnetic drive pairs provide a driving force to the movable seat 422 in the direction of the optical axis. The electromagnetic drive assembly provides a large driving force to the movable seat, enabling the lens to be dragged quickly and accurately to the focusing position, achieving rapid focusing of the camera module and improving the usability of the electronic device's autofocus function.

[0207] For example, the plane containing the third surface B3 is located between the plane containing the first surface B1 and the plane containing the second surface B2; the plane containing the fourth surface B4 is located outside the plane containing the first surface B1 and the plane containing the second surface B2. A portion of the range within which the second electromagnetic drive pair 4232 provides driving force to the movable seat 422 is located within the range within which the first electromagnetic drive pair 4231 provides driving force to the movable seat 422. The range within which the second electromagnetic drive pair 4232 provides driving force to the movable seat 422 partially overlaps with the range within which the first electromagnetic drive pair 4231 provides driving force to the movable seat 422.

[0208] Understandably, during the process where the second electromagnetic drive pair 4232 provides driving force to the movable seat 422, the first electromagnetic drive pair 4231 also provides driving force to the movable seat 422. During the period when both the second electromagnetic drive pair 4232 and the first electromagnetic drive pair 4231 simultaneously provide driving force to the movable seat 422, the electromagnetic drive assembly provides a larger driving force to the movable seat, enabling the lens to be quickly and accurately dragged to the focusing position, achieving rapid focusing of the camera module and improving the usability of the electronic device's autofocus function.

[0209] Figure 14 It shows Figure 12 A cross-sectional view formed along line A-A'.

[0210] In some embodiments, the position range of the magnetic element M2 in the second electromagnetic drive pair 4232 along the optical axis G coincides with the position range of the magnetic element M3 in the third electromagnetic drive pair 4233 along the optical axis G. The position range of the coil C2 in the second electromagnetic drive pair 4232 along the optical axis does not completely coincide with the position range of the coil C3 in the third electromagnetic drive pair 4233 along the optical axis.

[0211] In some examples, such as Figure 14 As shown, the position range of coil C2 in the second electromagnetic drive pair 4232 along the optical axis G does not coincide with the position range of coil C3 in the third electromagnetic drive pair 4233 along the optical axis. Understandably, the position range of coil C2 in the second electromagnetic drive pair 4232 along the optical axis is misaligned with the position range of coil C3 in the third electromagnetic drive pair 4233 along the optical axis.

[0212] Coil C2 includes a third surface B3 and a fourth surface B4 disposed opposite to each other along the optical axis G. The third surface B3 can be a surface near the object side, and the fourth surface B4 can be a surface near the image side. Similarly, coil C3 includes a fifth surface B5 and a sixth surface B6 disposed opposite to each other along the optical axis G. The fifth surface B5 can be a surface near the object side, and the sixth surface B6 can be a surface near the image side. Figure 14 As shown, the third surface B3 is located on the image side of the sixth surface B6.

[0213] In other words, such as Figure 14 As shown, in the optical axis direction, coil C2 in the second electromagnetic drive pair 4232 is located on the image side of coil C3 in the third electromagnetic drive pair 4233, and coil C3 in the third electromagnetic drive pair 4233 is located on the object side of coil C2 in the second electromagnetic drive pair 4232.

[0214] against Figure 14 The corresponding design details the movement of the movable seat 422 along the optical axis G.

[0215] Taking the process of the movable seat 422 moving from the image side to the object side as an example, it can be divided into three stages: the first stage P1, the second stage P2, and the third stage P3. Figure 15 The graphs showing the driving force on the movable seat 422 in the first, second and third stages are shown.

[0216] Phase 1 P1: The coil C1 in the first electromagnetic drive pair 4231 is positioned opposite the magnetic component M1 (magnetic component and coil facing each other: this means the N pole of the magnetic component is aligned with the first segment of the coil, and the S pole of the magnetic component is aligned with the second segment of the coil. Other situations do not constitute magnetic component and coil alignment and will not be discussed further). At this time, direct current is applied to the coil C1 in the first electromagnetic drive pair 4231 to provide a driving force to the movable seat 422 towards the object side. Simultaneously, the coil C2 in the second electromagnetic drive pair 4232 is positioned opposite the magnetic component M2 in the second electromagnetic drive pair 4232. At this time, direct current is applied to the coil C2 in the second electromagnetic drive pair 4232 to provide a driving force to the movable seat 422 towards the object side. In the first stage P1, the coil C3 in the third electromagnetic drive pair 4233 and the magnetic component M3 in the third electromagnetic drive pair 4233 are not directly opposite each other, and the third electromagnetic drive pair 4233 does not provide driving force to the movable seat 422.

[0217] In the first stage P1, the first electromagnetic drive pair 4231 and the second electromagnetic drive pair 4232 jointly provide a driving force to the movable seat 422 in the direction of moving closer to the object, causing the movable seat 422 to move in the direction of moving closer to the object. Figure 15 As shown, in the first stage P1, the driving force for the movable seat 422 to move towards the object side is relatively large.

[0218] In the second stage P2, as the movable seat 422 moves towards the object side, the coil C2 and magnetic component M2 in the second electromagnetic drive pair 4232 are no longer directly opposite each other, and the second electromagnetic drive pair 4232 no longer provides a force to the movable seat 422 towards the object side. However, the coil C1 and magnetic component M1 in the first electromagnetic drive pair 4231 remain directly opposite each other, and the first electromagnetic drive pair continues to supply direct current to the coil C1, so that the first electromagnetic drive pair 4231 continues to provide a force to the movable seat 422 towards the object side. In the second stage P2, the coil C3 and magnetic component M3 in the third electromagnetic drive pair 4233 are still not directly opposite each other, and the third electromagnetic drive pair 4233 does not provide a driving force to the movable seat 422.

[0219] In the second stage P2, only the first electromagnetic drive pair 4231 provides a driving force to the movable seat 422 to move towards the object side, and the movable seat 422 continues to move towards the object side. Figure 15 As shown, the driving force for the movable seat 422 to move towards the object side in the second stage P2 is less than the driving force for the movable seat 422 to move towards the object side in the first stage P1.

[0220] In the third stage P3: as the movable seat 422 continues to move towards the object side, the coil C1 in the first electromagnetic drive pair 4231 remains directly opposite the magnetic component M1. Direct current is applied to the coil C1, continuing to provide a force to the movable seat 422 towards the object side. Simultaneously, the moved movable seat 422 aligns the coil C3 in the third electromagnetic drive pair 4233 with the magnetic component M3. Direct current is then applied to the coil C3, causing the third electromagnetic drive pair 4233 to provide a force to the movable seat 422 towards the object side. In this third stage P3, the coil C2 in the second electromagnetic drive pair 4232 is not directly opposite the magnetic component M2, and the second electromagnetic drive pair 4232 does not provide a driving force to the movable seat 422.

[0221] In the third stage P3, the first electromagnetic drive pair 4231 and the third electromagnetic drive pair 4233 jointly provide a driving force to the movable seat 422 in the direction of moving closer to the object, and the movable seat 422 continues to move in the direction of moving closer to the object. Figure 15 As shown, the driving force for the movable seat 422 to move towards the object side in the third stage P3 is greater than the driving force for the movable seat 422 to move towards the object side in the second stage P2.

[0222] The process of the movable seat 422 moving from the object side to the image side is the opposite of the process of its movement from the image side to the object side, but the principle is the same, and will not be described again here. In this example, during the entire stroke of the movable seat 422 moving along the optical axis G within the housing 421, the first electromagnetic drive provides driving force to 4231 throughout the entire stroke, the second electromagnetic drive provides driving force to 4232 during the first stroke, and the third electromagnetic drive provides driving force to 4232 during the second stroke. The first and second strokes do not overlap.

[0223] It is evident that in the first stage P1 and the third stage P3, at least two electromagnetically driven opposing movable seats 422 provide driving force for movement in the direction of the optical axis G. Compared to only one electromagnetically driven opposing movable seat 422 providing driving force, this can enhance the driving force of the movable seat 422 and the lens 41. Even if the lens 41 is a glass lens or a high-density lens, which is relatively heavy, it can be dragged to the focus position quickly and accurately, enabling the camera module to focus quickly and improving the effect of the automatic focusing function of electronic devices.

[0224] Figure 16 It shows Figure 12 Another sectional view formed along line A-A'.Figure 17 It shows Figure 16 The front view of the structure after the corresponding drive motor is hidden in the cover.

[0225] In other examples, such as Figure 16 As shown, the position range of coil C2 in the second electromagnetic drive pair 4232 along the optical axis G partially overlaps with the position range of coil C3 in the third electromagnetic drive pair 4233 along the optical axis G. Understandably, in some cases, coil C2 in the second electromagnetic drive pair 4232 is positioned opposite to magnetic element M2, and coil C3 in the third electromagnetic drive pair 4233 is positioned opposite to magnetic element M3.

[0226] Coil C2 includes a third surface B3 and a fourth surface B4 disposed opposite to each other along the optical axis G. The third surface B3 can be a surface near the object side, and the fourth surface B4 can be a surface near the image side. Similarly, coil C3 includes a fifth surface B5 and a sixth surface B6 disposed opposite to each other along the optical axis G. The fifth surface B5 can be a surface near the object side, and the sixth surface B6 can be a surface near the image side. Figure 16 As shown, the plane containing the sixth surface B6 is located between the plane containing the third surface B3 and the plane containing the fourth surface B4.

[0227] In other words, such as Figure 16 As shown, in the optical axis direction, coil C2 in the second electromagnetic drive pair 4232 is located near the image side of coil C3 in the third electromagnetic drive pair 4233, and coil C3 in the third electromagnetic drive pair 4233 is located near the object side of coil C2 in the second electromagnetic drive pair 4233.

[0228] against Figure 16 The corresponding design details the movement of the movable seat 422 along the optical axis G.

[0229] Taking the process of the movable seat 422 moving from the image side to the object side as an example, it can be divided into the fourth stage P4, the fifth stage P5, and the sixth stage P6 in sequence. Figure 18 The graphs show the driving forces acting on the movable seat in the fourth, fifth, and sixth stages.

[0230] In the fourth stage (P4), the coil C1 and magnetic component M1 of the first electromagnetic drive pair 4231 are directly opposite each other. Direct current is applied to the coil C1 of the first electromagnetic drive pair 4231 to provide a driving force to the movable seat 422 towards the object. Simultaneously, the coil C2 and magnetic component M2 of the second electromagnetic drive pair 4232 are directly opposite each other. Direct current is applied to the coil C2 of the second electromagnetic drive pair 4232 to provide a driving force to the movable seat 422 towards the object. Thus, the movable seat 422 moves towards the object under the applied force. In the fourth stage (P4), the coil C3 and magnetic component M3 of the third electromagnetic drive pair 4233 are not directly opposite each other, and the third electromagnetic drive pair 4233 does not provide a driving force to the movable seat 422.

[0231] In the fourth stage P4, the first electromagnetic drive pair 4231 and the second electromagnetic drive pair 4232 jointly provide a driving force to the movable seat 422 in the direction of moving closer to the object, causing the movable seat 422 to move in the direction of moving closer to the object. Figure 18 As shown, in the fourth stage P4, the driving force for the movable seat 422 to move towards the object side is relatively large.

[0232] In the fifth stage (P5), during the movement of the movable seat 422 towards the object side, the coil C1 and magnetic component M1 of the first electromagnetic drive pair 4231 are positioned opposite each other. Direct current is applied to the coil C1, providing a driving force to the movable seat 422 towards the object side. Similarly, the coil C2 and magnetic component M2 of the second electromagnetic drive pair 4232 are positioned opposite each other. Direct current is applied to the coil C2, providing a driving force to the movable seat 422 towards the object side. At the same time, the moved seat 422 causes the coil C3 in the third electromagnetic drive pair 4233 and the magnetic element M3 in the third electromagnetic drive pair 4233 to be directly opposite each other. At this time, DC current can be supplied to the coil C3 in the third electromagnetic drive pair 4233 so that the third electromagnetic drive pair 4233 provides a force to the movable seat 422 to move towards the object side.

[0233] In the fifth stage P5, the first electromagnetic drive pair 4231, the second electromagnetic drive pair 4232, and the third electromagnetic drive pair 4233 jointly provide a driving force to the movable seat 422 in the direction closer to the object, causing the movable seat 422 to move in the direction closer to the object. Figure 18As shown, in the fifth stage P5, the driving force of the movable seat 422 on the second electromagnetic drive to 4232 gradually weakens, while the driving force on the third electromagnetic drive to 4233 gradually strengthens. Therefore, the driving force of the movable seat 422 moving towards the object side in the fifth stage P5 is relatively balanced, which facilitates the control of the movement of the movable seat 422. In some cases, by precisely controlling the current on coils C2 and C3, the driving force on the movable seat 422 in the fifth stage P5 can be stabilized.

[0234] Phase 6 (P6): During the movement of the movable seat 422 towards the object side, the coil C2 and magnetic component M2 in the second electromagnetic drive pair 4232 are no longer directly opposite each other, and the second electromagnetic drive pair 4232 no longer provides a force to the movable seat 422 towards the object side. The coil C1 in the first electromagnetic drive pair 4231 remains directly opposite to the magnetic component M1, and direct current continues to be supplied to the coil C1, continuing to provide a force to the movable seat 422 towards the object side. Additionally, the coil C3 in the third electromagnetic drive pair 4233 is directly opposite to the magnetic component M3, and direct current can be supplied to the coil C3 to provide a force to the movable seat 422 towards the object side.

[0235] In stage P6, the first electromagnetic drive pair 4231 and the third electromagnetic drive pair 4233 jointly provide a driving force to the movable seat 422 in the direction of moving closer to the object, causing the movable seat 422 to move in the direction of moving closer to the object. Figure 18 As shown, in the sixth stage P6, the driving force for the movable seat 422 to move towards the side closer to the object is relatively large.

[0236] The process of the movable seat 422 moving from the object side to the image side is the opposite of the process of its movement from the image side to the object side, but the principle is the same, and will not be repeated here. In this example, during the entire stroke of the movable seat 422 moving along the optical axis G within the housing 421, the first electromagnetic drive provides driving force to 4231 throughout the entire stroke, the second electromagnetic drive provides driving force to 4232 during the first stroke, and the third electromagnetic drive provides driving force to 4232 during the second stroke. The first and second strokes partially overlap.

[0237] As can be seen, in the fourth stage P4 to the fifth stage P5, at least two electromagnetic drive opposing movable seats 422 provide driving force for movement in the direction of optical axis G. Compared with only one electromagnetic drive opposing movable seat 422 providing driving force, it can improve the driving power of the movable seat 422 and the lens 41. Even if the lens 41 is a glass lens or a high-density lens, which is relatively heavy, it can quickly and accurately drag the lens to the focus position, realize the camera module to focus quickly, and improve the use effect of the automatic focus function of electronic devices.

[0238] Figure 19 A current control framework diagram of a drive motor provided in some embodiments of this application is shown.

[0239] In some embodiments, the electromagnetic drive assembly 423 may further include a driver integrated circuit 427. The driver integrated circuit includes multiple control channels. Each of the multiple control channels is connected to a proportional-integral-derivative (PID) controller. The number of control channels may be equal to the number of electromagnetic drive pairs. For example, if the electromagnetic drive assembly 423 includes two electromagnetic drive pairs, the driver integrated circuit includes two control channels. As another example, if the electromagnetic drive assembly 423 includes three electromagnetic drive pairs, the driver integrated circuit includes three control channels.

[0240] Each control channel is used to connect to a coil in an electromagnetic drive pair to control the current in that coil. For example... Figure 19 As shown, the driver integrated circuit includes three control channels (G1, G2, and G3). Control channel G1 is connected to coil C1 in the first electromagnetic drive pair 4231 and is used to control the current flowing through coil C1. Control channel G2 is connected to coil C2 in the second electromagnetic drive pair 4232 and is used to control the current flowing through coil C2. Control channel G3 is connected to coil C3 in the third electromagnetic drive pair 4233 and is used to control the current flowing through coil C3.

[0241] Control channels G1, G2, and G3 output independently and do not affect each other. For example, when control channel G1 supplies a clockwise current to coil C1 in the first electromagnetic drive pair 4231, control channel G2 can supply no current or a clockwise current to coil C2 in the second electromagnetic drive pair 4232. As another example, when control channel G1 supplies a constant current to coil C1 in the first electromagnetic drive pair 4231, control channel G3 can supply a varying current to coil C3 in the third electromagnetic drive pair 4233.

[0242] Since the resistance of each coil (C1, C2, and C3) is fixed, the control channel can make each coil generate current by providing an operating voltage to the coil.

[0243] Specifically, the operating voltage Vout1 provided by control channel G1 to coil C1 is V1 × AFtarget. The operating voltage Vout2 provided by control channel G2 to coil C2 is V2 × AFtarget. The operating voltage Vout3 provided by control channel G3 to coil C3 is V3 × AFtarget. AFtarget is the voltage value corresponding to the autofocus signal of the camera module, V1 is the first conversion coefficient of the first electromagnetic drive mapping, V2 is the second conversion coefficient of the second electromagnetic drive mapping, and V3 is the third conversion coefficient of the third electromagnetic drive mapping.

[0244] like Figure 19 As shown, a switch S1 is also connected in series in the control channel G2. The driver integrated circuit 427 can control the switch S1 to be turned on or off, thereby controlling whether the coil C2 in the second electromagnetic drive pair 4232 receives the working voltage Vout2 and generates current. For example, in the first stage P1 described above, the driver integrated circuit 427 can control the switch S1 to be turned on, so that the coil C2 receives the working voltage Vout2 and generates current, and the second electromagnetic drive pair 4232 can provide driving force to the movable seat 422. In the second stage P2 and the third stage P3 described above, the driver integrated circuit 427 can control the switch S1 to be turned off, so that the coil C2 cannot receive the working voltage Vout2 and generate current.

[0245] In the second stage P2 and the third stage P3, the second electromagnetic drive pair 4232 does not provide driving force to the movable seat 422. By controlling the switch S1 to be disconnected through the drive integrated circuit 427, unnecessary current can be avoided from the coil C2, saving the power consumption of the drive motor 42 and the camera module 40, and improving the battery life of the electronic device 100.

[0246] Similarly, a switch S2 is connected in series in the control channel G3. The method, principle, and beneficial effects of the driver integrated circuit 427 controlling switch S2 can be found in the description of the driver integrated circuit 427 controlling switch S1, which will not be repeated here.

[0247] Figure 20 A current control framework diagram of a drive motor provided in some other embodiments of this application is shown.

[0248] In some embodiments, to accurately determine the relative positions between the coils and magnetic elements in each electromagnetic drive pair (understandably, to accurately determine whether the coils and magnetic elements in the electromagnetic drive pair are aligned), the drive motor 42 may further include magnetic sensors. The number of magnetic sensors may be equal to the number of coils in the electromagnetic drive pair, with multiple magnetic sensors corresponding one-to-one with the coils in multiple electromagnetic drive pairs.

[0249] Each electromagnetic drive pair has a corresponding magnetic sensor used to detect the relative position information between the electromagnetic drive centering coil and the magnetic component. The magnetic sensor can also be connected to the drive integrated circuit to provide the drive integrated circuit with the position information between the electromagnetic drive centering coil and the magnetic component, thereby enabling the drive integrated circuit to supply current to the coil in a timely manner so that the movable seat 422 receives driving force to move; or, enabling the drive integrated circuit to stop supplying current to the coil in a timely manner to save unnecessary current and reduce the power consumption of the camera module.

[0250] Please refer to the following: Figure 12 , Figure 14 and Figure 20 When the drive motor 42 includes a first electromagnetic drive pair 4231, a second electromagnetic drive pair 4232, and a third electromagnetic drive pair 4233, the electromagnetic drive assembly 423 may further include a first magnetic sensor 4281, a second magnetic sensor 4282, and a third magnetic sensor. Figure 12 Not shown in the image. Figure 14 (As shown in the figure) 4283. The first magnetic sensor 4281 is used to detect the relative position information between coil C1 and magnetic component M1; the second magnetic sensor 4282 is used to detect the relative position information between coil C2 and magnetic component M2; the third magnetic sensor 4283 is used to detect the relative position information between coil C3 and magnetic component M3.

[0251] For example, the first magnetic sensor 4281 is located inside the space enclosed by the first coil C1. Since the area enclosed by the first coil C1 has relatively abundant magnetism, placing the first magnetic sensor 4281 within the area enclosed by the first coil C1 can improve the detection sensitivity of the first magnetic sensor 4281, thereby enhancing the reliability of the first magnetic sensor 4281.

[0252] In some examples, the magnetic sensors (first magnetic sensor 4281, second magnetic sensor 4282 and / or third magnetic sensor 4283) can be Hall sensors.

[0253] Taking the Hall sensor used to detect the position information between coil C3 and magnetic element M3 in the third electromagnetic drive pair 4233 as an example, the Hall sensor can convert the change in the magnetic field jointly formed by coil C3 and magnetic element M3 into the change in output voltage. Understandably, when the position between coil C3 and magnetic element M3 changes, causing a change in the magnetic field jointly formed by coil C3 and magnetic element M3, the voltage output by the Hall sensor will also change accordingly.

[0254] The Hall sensor is connected to the driver integrated circuit. By collecting changes in the output voltage of the Hall sensor, the driver integrated circuit can detect changes in the position between coil C3 and magnetic component M3. When the driver integrated circuit detects that coil C3 and magnetic component M3 are aligned, it controls the second switch S2 to turn on. Coil C3 receives the operating voltage Vout3 and generates current, which provides the driving force from the third electromagnetic drive pair 4233 to the movable base 422, increasing the driving force for the movable base 422 to move along the optical axis. When the driver integrated circuit detects that coil C3 and magnetic component M3 are not aligned, it controls the second switch S2 to turn off. Coil C3 loses its operating voltage and no longer generates current, thus saving unnecessary current and reducing the power consumption of the camera module.

[0255] In other examples, the magnetic sensors (first magnetic sensor 4281, second magnetic sensor 4282, and / or third magnetic sensor 4283) can be tunneling magnetoresistance (TMR) sensors. TMR sensors can consist of a thin layer of ferromagnetic material and a nanometer-thick insulator, using quantum tunneling for highly sensitive magnetic field measurements.

[0256] Taking the TMR sensor used to detect the relative position information between coil C2 and magnetic component M2 in the second electromagnetic drive pair 4232 as an example, the TMR sensor can measure the change in the magnetic field jointly formed by coil C2 and magnetic component M2, and convert it into a change in resistance that is easy to measure. Understandably, when the relative position between coil C2 and magnetic component M2 changes, causing a change in the magnetic field jointly formed by coil C2 and magnetic component M2, the resistance output by the TMR sensor will also change accordingly.

[0257] The TMR sensor is connected to a driver integrated circuit. By acquiring changes in the resistance output of the TMR sensor, the driver integrated circuit can detect positional changes between coil C2 and magnetic component M2. When the driver integrated circuit detects that coil C2 and magnetic component M2 are aligned, it controls the first switch S1 to turn on, allowing coil C2 to receive its operating voltage Vout2 and generate current. This provides the second electromagnetic drive pair 4232 with the driving force, increasing the driving force for the movable base 422 to move along the optical axis. When the driver integrated circuit detects that coil C2 and magnetic component M2 are not aligned, it controls the first switch S1 to turn off, causing coil C2 to lose its operating voltage and cease generating current, thus saving unnecessary current and reducing the power consumption of the camera module.

[0258] TMR sensors are more sensitive to changes in external magnetic fields and have a faster output response. Therefore, using a TMR sensor as a magnetic sensor 4232 can also improve the control accuracy and response speed of the drive motor.

[0259] In this embodiment, by adding a magnetic sensor, the drive motor 42 can control whether each coil generates current in a closed loop based on the positional changes between the electromagnetic drive centering coil and the magnetic component during the automatic focusing process of the camera module 40, thereby improving the reliability and power consumption of the drive motor 42 control.

[0260] Furthermore, the movable base 422 may tilt during movement, causing the lens on it to tilt synchronously; alternatively, the movable base 422 may tilt if the electronic device 100 is subjected to an external impact. This increases the movement error of the drive motor and the focusing accuracy of the camera module lens. To address this issue, in some embodiments, the magnetic sensor, in addition to detecting the relative position between the electromagnetic drive centering coil and the magnetic component, can also be used to detect whether the movable base 422 tilts during its movement along the optical axis G.

[0261] Taking the second magnetic sensor 4282 as an example, if the movable seat 422 tilts during its movement along the optical axis G, it will inevitably cause a tilt between the coil C2 and the magnetic component M2 in the second electromagnetic drive 4232. This will also cause a change in the magnetic field jointly formed between the coil C2 and the magnetic component M2. The second magnetic sensor 4282 can detect the change in the magnetic field, thereby determining whether the movable seat 422 tilts during its movement along the optical axis G.

[0262] Therefore, the magnetic sensor 4232 is connected to the driving integrated circuit. The driving integrated circuit, by acquiring the electrical signal output by the second magnetic sensor 4282, can detect whether there is a tilt between the coil C2 and the magnetic component M2. If the second magnetic sensor 4282 detects a tilt between the coil C2 and the magnetic component M2, it can be determined that the movable seat 422 tilted during its movement along the optical axis G; if the second magnetic sensor 4282 detects no tilt between the coil C2 and the magnetic component M2, it can be determined that the movable seat 422 did not tilt during its movement along the optical axis G.

[0263] Thus, when the drive integrated circuit detects a tilt between coil C2 and magnetic component M2, it promptly adjusts the operating voltage Vout2 supplied to coil C2 to change the current generated by coil C2. This increases the restoring force provided by the second electromagnetic drive pair 4232 to the movable seat 422 for correcting the tilt, thereby restoring the movable seat 422 to its correct position. By correcting the tilt angle of the movable seat 422, the accuracy of the drive motor 42's movement can be improved; additionally, it can prevent the lens on the movable seat 422 from tilting, improving the focusing effect of the camera module 40 lens.

[0264] In some examples, when the driving integrated circuit identifies that the coil C2 is aligned with the magnetic component M2 based on the electrical signal (voltage output by the Hall sensor or resistance output by the TMR sensor) provided by the second magnetic sensor 4282, the driving integrated circuit adjusts the operating voltage Vout2 to the coil C2 in a timely manner, so that the movable seat 422 is driven to move in the optical axis direction, while the coil C2 also provides a restoring force to the magnetic component M2 to correct tilt.

[0265] When the driver integrated circuit detects that coil C2 and magnetic component M2 are not aligned based on the electrical signal provided by the second magnetic sensor 4232, it normally does not provide operating voltage Vout2 to coil C2. However, when the driver integrated circuit detects that coil C2 and magnetic component M2 are tilted based on the electrical signal provided by the second magnetic sensor 4282, it controls the first switch S1 to turn on, providing operating voltage Vout2 to coil C2 so that coil C2 provides a restoring force to correct the tilt to magnetic component M2. After coil C2 and magnetic component M2 are corrected and no longer tilted, the driver integrated circuit then controls the first switch S1 to turn off, and coil C2 no longer generates current.

[0266] The above uses the second magnetic sensor 4282 as an example to illustrate the function of the magnetic sensor when the movable seat 422 is tilted. The first magnetic sensor 4281 and the third magnetic sensor 4283 can also perform the function of the second magnetic sensor 4282, which will not be elaborated here.

[0267] It should be noted that if coil C2 tilts relative to magnetic component M2, then coil C3 will also tilt relative to magnetic component M3. Therefore, it is also possible that when the electrical signal provided by the third magnetic sensor 4283 detects the tilt between coil C3 and magnetic component M3, the drive integrated circuit controls the first switch S1 to turn on, providing a working voltage Vout2 to coil C2, so that coil C3 provides a restoring force to magnetic component M3 to correct the tilt.

[0268] This application also provides a computer-readable storage medium including computer instructions that, when executed on the controller, cause the controller to perform various functions or steps of the driver integrated circuit in the above embodiments.

[0269] This application also provides a computer program product that, when run on a computer, causes the computer to perform various functions or steps of the driver integrated circuit in the above method embodiments.

[0270] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0271] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0272] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0273] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0274] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially or in other words, the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0275] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A drive motor characterized by, The application is applied to a camera module, the camera module comprising a lens; the driving motor comprising: a movable seat comprising a first side wall and a second side wall, a plane where the first side wall is located and a plane where the second side wall is located are not parallel, the movable seat is used for carrying the lens; an electromagnetic driving assembly comprising at least a first electromagnetic driving pair and a second electromagnetic driving pair, the first electromagnetic driving pair is connected to the first side wall, the second electromagnetic driving pair is connected to the second side wall, the electromagnetic driving assembly is used for driving the movable seat to move.

2. The driving motor according to claim 1, wherein the first electromagnetic driving pair comprises a first coil and a first magnetic piece; the first coil and the first magnetic piece are arranged at intervals, and the first magnetic piece is located in the movable seat; the second electromagnetic driving pair comprises a second coil and a second magnetic piece; the second coil and the second magnetic piece are arranged at intervals, and the second magnetic piece is located in the movable seat; the first coil comprises a first surface and a second surface arranged oppositely in the moving direction of the movable seat, the second coil comprises a third surface and a fourth surface arranged oppositely in the moving direction of the movable seat; a plane where the third surface is located is between a plane where the first surface is located and a plane where the second surface is located.

3. The drive motor of claim 2, wherein, In the moving direction of the movable seat, the interval distance between the first surface and the second surface is greater than the interval distance between the third surface and the fourth surface.

4. Drive motor according to any one of claims 1-3, characterized in that, The movable seat further comprises a third side wall, and the electromagnetic driving assembly further comprises a third electromagnetic driving pair, the third electromagnetic driving pair is connected to the third side wall; the third side wall is parallel to the second side wall.

5. The driving motor according to claim 4, wherein the third electromagnetic driving pair comprises a third coil and a third magnetic piece; the third coil and the third magnetic piece are arranged at intervals, and the third magnetic piece is located in the movable seat; the second electromagnetic driving pair comprises a second coil and a second magnetic piece; the second coil and the second magnetic piece are arranged at intervals, and the second magnetic piece is located in the movable seat; the third coil comprises a fifth surface and a sixth surface arranged oppositely in the moving direction of the movable seat, the second coil comprises a third surface and a fourth surface arranged oppositely in the moving direction of the movable seat; a plane where the sixth surface is located is between a plane where the third surface is located and a plane where the fourth surface is located.

6. The driving motor according to any one of claims 1-5, wherein the first electromagnetic driving pair comprises a first magnetic piece, and the second electromagnetic driving pair comprises a second magnetic piece; a volume of the first magnetic piece is greater than a volume of the second magnetic piece; and / or the first electromagnetic driving pair comprises a first coil, and the second electromagnetic driving pair comprises a second coil; a volume of the first coil is greater than a volume of the second coil.

7. The drive motor according to any one of claims 1 to 6, characterized in that The driving motor further comprises: a guide rod extending in the moving direction of the movable seat; The movable seat comprises a through hole penetrating the movable seat, and the guide rod penetrates the through hole; the movable seat moves along the guide rod.

8. The drive motor of claim 7, wherein, The movable seat comprises: a body portion for carrying the lens; a connecting portion connected to the body portion; the through hole is formed in the body portion; wherein, in the moving direction of the movable seat, the size of the connecting portion is greater than the size of the body portion.

9. The drive motor of claim 8, wherein, The first electromagnetic driving pair is connected to the connecting portion, and the second electromagnetic driving pair is connected to the body portion.

10. The drive motor of any one of claims 1-9, wherein, The second electromagnetic driving pair comprises a second coil and a second magnetic member, and the second coil and the second magnetic member are arranged in a spaced manner; The driving motor further comprises: a magnetic sensor for detecting position information between the second coil and the second magnetic member; a driving integrated circuit coupled to the magnetic sensor; the driving integrated circuit is configured to stop providing current to the second coil when the position information indicates that the second coil is not aligned with the second magnetic member.

11. The drive motor of claim 10, wherein, The magnetic sensor is located in an area surrounded by the second coil.

12. The drive motor of any one of claims 1-11, wherein, The first side wall and the second side wall are connected.

13. A control method of driving a motor, characterized by, The driving motor comprises the driving motor according to any one of claims 1-12; the method comprises: controlling the second electromagnetic driving pair to drive the movable seat to move at least part of the time when the first electromagnetic driving pair drives the movable seat to move; the direction in which the first electromagnetic driving pair drives the movable seat to move is the same as the direction in which the second electromagnetic driving pair drives the movable seat to move.

14. The method of claim 13, wherein, In the case where the driving motor comprises a third electromagnetic driving pair, the method further comprises: controlling the third electromagnetic driving pair to drive the movable seat to move at least part of the time when the first electromagnetic driving pair drives the movable seat to move; the direction in which the first electromagnetic driving pair drives the movable seat to move is the same as the direction in which the third electromagnetic driving pair drives the movable seat to move.

15. The method of claim 14, wherein, Before the control of the third electromagnetic driving pair to drive the movable seat to move, it comprises: controlling the first electromagnetic driving pair to drive the movable seat to move while controlling the second electromagnetic driving pair to drive the movable seat to move; The control of the third electromagnetic driving pair to drive the movable seat to move comprises: controlling the first electromagnetic driving pair to drive the movable seat to move while controlling the third electromagnetic driving pair to drive the movable seat to move.

16. The method of claim 15, wherein, The second electromagnetic driving pair comprises a second coil and a second magnetic member, and the second coil and the second magnetic member are arranged in a spaced manner; The control of the third electromagnetic driving pair to drive the movable seat to move further comprises: stopping providing current to the second coil.

17. A camera module, comprising: It comprises: a lens; a driving motor according to any one of claims 1-12, the driving motor being fixedly connected to the lens; and an image sensor located on the light-emitting side of the lens and arranged in a spaced manner with the driving motor.

18. An electronic device, comprising: It comprises: a middle frame comprising a bezel and a middle plate connected to each other; a back cover comprising a light-transmitting hole penetrating the back cover; the back cover is located on one side of the middle frame and connected to the bezel; The camera module of claim 17, disposed on the middle plate, a lens of the camera module being disposed opposite to at least part of the light-transmitting port.

19. An electronic device, comprising: An electronic device, including a memory and one or more processors; the memory is coupled to the processor; the memory has computer program codes stored therein, the computer program codes include computer instructions, when the computer instructions are executed by the processor, causing the electronic device to perform the method of any one of claims 13-16.

20. A computer-readable storage medium, characterized in that, A computer program product, including computer instructions, when the computer instructions are run on an electronic device, causing the electronic device to perform the method of any one of claims 13-16.

21. A computer program product, characterised in that, A computer program product, when the computer program product is run on an electronic device, causing the electronic device to perform the method of any one of claims 13-16.

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