Iris diaphragm, control method, camera module and electronic device

Abstract

The present application provides an iris diaphragm, a control method, a camera module, and an electronic device. The iris diaphragm comprises a base, a carrier, a plurality of blades, a drive coil, a drive magnet, a first magnetic attraction member, and a second magnetic attraction member. In the present application, by designing the first magnetic attraction member and the second magnetic attraction member, when positions of the blades are at set target positions, the drive coil can be deenergized and the blades can be stably kept at the target positions, thereby achieving deenergization locking of the blades, reducing the current power consumption of the iris diaphragm, and helping to improve the resolution of a camera module.

Description

Variable aperture, control method, camera module and electronic equipment

[0001] This application claims priority to Chinese Patent Application No. 202510048324.0, filed on January 9, 2025, entitled "Variable Aperture, Control Method, Camera Module and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of camera technology, specifically to a variable aperture, control method, camera module, and electronic device. Background Technology

[0003] A typical camera module includes a variable aperture and a lens, with the variable aperture mounted on the light-incident side of the lens. The current consumption of the variable aperture affects the lens characteristics, and consequently, the resolution of the entire camera module.

[0004] However, current variable apertures consume a lot of current, which leads to a decrease in the resolution of the camera module. Summary of the Invention

[0005] This application provides a variable aperture, a control method, a camera module, and an electronic device. The variable aperture includes a base, a carrier, multiple blades, a drive coil, a drive magnet, a first magnetic chuck, and a second magnetic chuck. By designing the first and second magnetic chucks, the drive coil can be de-energized when the blades are at a set target position, and the blades can be stably held at the target position. This achieves power-off locking of the blades, reduces the current consumption of the variable aperture, and helps improve the resolution of the camera module.

[0006] In a first aspect, this application provides a variable aperture. The variable aperture includes a base, a carrier, multiple blades, a drive coil, a drive magnet, a first magnetic chuck, and a second magnetic chuck. The carrier is rotatably connected to the base, the blades are connected to the base and the carrier, and the multiple blades surround the aperture hole. The base includes a bottom plate and a first peripheral plate, the first peripheral plate being connected to the periphery of the bottom plate. The base has a first mounting hole that penetrates the first peripheral plate radially along the variable aperture. The drive coil and the drive magnet are both at least partially located in the first mounting hole. The drive coil is mounted on the bottom plate, and the drive magnet is mounted on the carrier. The drive coil and the drive magnet are arranged opposite each other along the thickness direction of the variable aperture. The drive coil is used to drive the drive magnet to rotate the carrier relative to the base, thereby changing the aperture size. The first magnetic chuck is mounted on the base and located on the side of the drive coil opposite to the drive magnet. The first magnetic chuck and the drive magnet are arranged opposite each other along the thickness direction of the variable aperture. The second magnetic chuck is mounted on the base and is arranged opposite each other to the drive magnet radially along the variable aperture.

[0007] In this application, the aperture of the aperture hole is adjusted by using a variable aperture, thereby controlling the amount of light entering and the depth of field, so that the camera module can be adaptively adjusted for different shooting scenarios, thereby improving the shooting quality of the camera module in different shooting scenarios and improving the shooting capability of the camera module.

[0008] In this application, the design of the first mounting hole allows the drive coil to be exposed through it. The drive coil at least partially overlaps with the base plate in the thickness direction of the variable aperture, thereby reducing the dimensional space occupied by the drive coil in the thickness direction of the variable aperture, which is beneficial for achieving a thinner design of the variable aperture. In addition, the setting of the first mounting hole also enables a material-reducing design of the base, which can reduce the weight of the base and is beneficial for the lightweight design of the variable aperture.

[0009] In this application, the first mounting hole provides mounting space for the driving magnet and the driving coil, which not only improves the ease of mounting the driving magnet and the driving coil, but also avoids the first side plate from hindering the mounting of the driving coil and the driving magnet. This reduces the radial dimension of the base, thereby reducing the radial dimension of the variable aperture, which is beneficial for the miniaturization design of the variable aperture.

[0010] In this application, the first magnetic attractor and the driving magnet are arranged opposite each other along the thickness direction of the variable aperture, so that the first magnetic attractor and the driving magnet can generate a magnetic attraction force in the Z-axis direction, allowing the carrier to be stably connected to the base in the Z-axis direction. The second magnetic attractor and the driving magnet are arranged opposite each other along the radial direction of the variable aperture, so that the second magnetic attractor and the driving magnet can generate a lateral magnetic attraction force, allowing the carrier to be stably connected to the base in the radial direction of the variable aperture. Therefore, during the aperture adjustment process and after the aperture adjustment is completed, both the first and second magnetic attractors can strengthen the connection between the carrier and the base through the magnetic attraction force with the driving magnet, improving the stability of the connection between the carrier and the base, preventing carrier wobbling, and improving the stability of the aperture. Furthermore, due to the configuration of the first and second magnetic components, the current of the drive coil can be cut off after the aperture adjustment is completed. The stability of the carrier and blades is ensured by the first and second magnetic components, thereby ensuring the stability of the aperture diameter, achieving power-off locking, reducing the steady-state current of the variable aperture, and reducing power consumption. This is beneficial for improving the resolution of the camera module when the variable aperture is applied.

[0011] In some possible implementations, the base also includes multiple support platforms, which protrude from the same side of the base plate as the first peripheral side plate. The support platforms are connected to the inner side of the first peripheral side plate. The multiple support platforms are arranged at intervals along the circumference of the variable aperture. The side of the support platform away from the first peripheral side plate is provided with a first mounting groove. The support platform has a first bearing surface facing away from the base plate. The variable aperture also includes multiple rolling elements, with one rolling element corresponding to one first mounting groove. The carrier includes a body and multiple first protrusions. The body has an annular structure and has an inner annular surface and an outer annular surface arranged opposite to each other. The first protrusions are connected to the side of the body facing the base plate, and the first protrusions are closer to the inner annular surface than the outer annular surface. The surface of the body facing the base plate abuts against the first bearing surface, and the surface of the first protrusion facing the outer annular surface abuts against the rolling element.

[0012] In this implementation, the surface of the body facing the base plate can abut against the first bearing surface, meaning the bottom surface of the body can abut against the first bearing surface, allowing the base to provide Z-axis support to the carrier via the first bearing surface. Furthermore, since the first bearing surface is higher than the second bearing surface, a gap exists between the body and the second bearing surface, preventing excessive friction due to an excessively large contact area between the body and the support platform. This design reduces frictional resistance between the base and the carrier while ensuring relatively stable support, facilitating better rotation of the carrier relative to the base. The surface of the first protrusion facing the outer ring of the body can abut against a rolling element, enabling the carrier to rotate relative to the base.

[0013] In this design, among the multiple rolling elements, the first ball is closer to the second magnetic element than the second ball. Under the action of the second magnetic element, the carrier moves towards the second ball under the drive of the driving magnet, so that the carrier abuts against the second ball in the radial direction of the variable aperture, and the second ball abuts against the base in the radial direction of the variable aperture. This not only achieves the stability of the carrier in the radial direction of the variable aperture, but also helps to improve the contact stability between the carrier and the second ball. It also helps to provide rolling friction for the carrier through the second ball, so as to better realize the rotation of the carrier relative to the base.

[0014] In some possible implementations, the variable aperture is applied to electronic devices, and the variable aperture satisfies: (F z -mg)μ1L1+F c μ2L2>1.2×(F r1 +F r2 ) (F c -mg) / (μ1F z )>1.2

[0015] Among them, F zdenoted as , where is the magnetic attraction force of the first magnetic element on the driving magnet; m is the total weight of the carrier, driving magnet, and blades; μ1 is the coefficient of friction between the body and the first bearing surface; L1 is the distance between the contact surface between the body and the first bearing surface and the center of the carrier; F c F is the magnetic attraction force of the second magnetic element on the driving magnet; μ2 is the coefficient of friction between the first protrusion and the rolling element; L2 is the distance between the contact point between the first protrusion and the rolling element and the center of the carrier; F r1 F represents the perturbation torque of internal components of an electronic device on a variable aperture. r2 This refers to the disturbance torque exerted by the external forces on the variable aperture.

[0016] In this implementation, the above-described formula design allows for stable magnetic attraction between the first and second magnetic components and the driving magnet during aperture adjustment. This provides the carrier with torque in the thickness and lateral directions of the variable aperture, overcoming external disturbances and enabling the carrier to rotate stably relative to the base, thus achieving stable aperture switching. Furthermore, the formula design also ensures that after aperture adjustment, the first magnetic component generates a strong Z-axis magnetic attraction with the driving magnet, and the second magnetic component generates a strong lateral magnetic attraction with the driving magnet. This allows the carrier to stably rest on the base's support platform in the Z-axis direction and stably abut against the rolling element in the radial direction of the variable aperture. At this point, there is no need to control the carrier's stability through the driving coil. Therefore, by de-energizing the driving coil, the steady-state current of the variable aperture can be reduced, resulting in lower power consumption. This is beneficial for improving the resolution of the camera module when the variable aperture is used.

[0017] In some possible implementations, there are multiple first mounting holes, which are spaced apart circumferentially along the variable aperture; there are multiple driving magnets, driving coils, and first magnetic attractants, with one driving magnet and one driving coil corresponding to one first mounting hole, and one first magnetic attractant corresponding to one driving magnet.

[0018] In this implementation, the number of first magnetic components can be the same as the number of driving magnets, and one first magnetic component corresponds to one driving magnet, so as to ensure that in each area where a driving magnet is set, the first magnetic component can be magnetically attracted to the driving magnet, thereby improving the connection stability between the carrier and the base in the Z-axis direction.

[0019] In some possible implementations, multiple first mounting holes are arranged at uniform intervals along the circumference of the variable aperture.

[0020] In this implementation, since multiple first mounting holes can be evenly spaced along the circumference of the variable aperture, the driving magnet and the driving coil can also be evenly spaced along the axial direction of the variable aperture. Thus, the stability of the carrier's rotation relative to the base can be improved through the cooperation of the driving magnet and the driving coil.

[0021] In some possible implementations, the first magnetic element is elongated and is positioned at least partially opposite the driving magnet during the rotational stroke of the carrier relative to the base.

[0022] In this implementation, during the rotational stroke of the carrier relative to the base, the first magnetic attractor and the driving magnet are at least partially facing each other, so that the first magnetic attractor can provide the carrier with an attraction force in the Z-axis direction during the rotational stroke of the carrier relative to the base, thereby making the carrier highly stable in the Z-axis direction throughout the entire rotational stroke.

[0023] In some possible implementations, the variable aperture also includes multiple rolling elements located between the carrier and the base; the number of driving magnets is multiple, and the multiple driving magnets are arranged at intervals along the circumference of the variable aperture; the second magnetic attractor is arranged corresponding to one of the multiple driving magnets; the multiple rolling elements include a first ball and a second ball, the first ball being closer to the second magnetic attractor than the second ball, the carrier abutting against the second ball along the radial direction of the variable aperture, and the second ball abutting against the base along the radial direction of the variable aperture.

[0024] In this implementation, the second magnetic attractor is positioned corresponding to only one of the multiple driving magnets, ensuring that the carrier is only subjected to lateral magnetic attraction in one direction. This is beneficial for the carrier's stability in the radial direction of the variable aperture. Among the multiple rolling elements, since the first ball is closer to the second magnetic attractor than the second ball, under the action of the second magnetic attractor, the carrier moves towards the second ball under the influence of the driving magnet. This allows the carrier to abut against the second ball in the radial direction of the variable aperture, and the second ball to abut against the base in the radial direction of the variable aperture. This achieves both the stability of the carrier in the radial direction of the variable aperture and improves the contact stability between the carrier and the second ball. It also facilitates the use of the second ball to provide rolling friction for the carrier, thus better enabling the carrier to rotate relative to the base.

[0025] In some possible implementations, the base also includes a second peripheral side plate, which protrudes from the same side of the base plate as the first peripheral side plate. The base plate has a first through hole, and the second peripheral side plate is circumferentially connected to the periphery of the first through hole, forming a second through hole. The first through hole, the second through hole, and the aperture hole are sequentially connected. The first peripheral side plate, the second peripheral side plate, and the base plate form a first mounting space, and the first mounting hole connects to the first mounting space. The carrier includes a body and a second protrusion. The body is rotatably connected to the base, and the second protrusion is connected to the outer periphery of the body. The second protrusion is located in the first mounting hole. A portion of the driving magnet is installed in the body, and another portion of the driving magnet is installed in the second protrusion. A second magnetic attractor is located in the first mounting space and is installed on the surface of the second peripheral side plate facing the first peripheral side plate.

[0026] In this implementation, due to the structural design of the base, the carrier can be partially installed in the first installation space and fitted onto the outside of the second peripheral side plate. This design helps to improve the stability of the carrier installed on the base and also improves the space utilization rate.

[0027] In some possible implementations, the first mounting hole has a first sidewall and a second sidewall on the first peripheral side plate, the first sidewall and the second sidewall being arranged opposite each other along the circumference of the variable aperture, the aperture having the maximum aperture when the second protrusion abuts against the first sidewall, and the aperture having the minimum aperture when the second protrusion abuts against the second sidewall.

[0028] In this implementation, the first and second sidewalls can form a limiting feature for the second protrusion, preventing damage to the blade when the carrier rotates it. In other words, when the second protrusion abuts against the first or second sidewall, there is a gap between the second protrusion and both ends of the sliding hole. This design prevents the second protrusion from causing excessive rotation of the blade, thus avoiding damage due to excessive force on the blade.

[0029] In some possible implementations, the second magnetic element is elongated and is positioned at least partially opposite the driving magnet during the rotational stroke of the carrier relative to the base.

[0030] In this implementation, during the rotational stroke of the carrier relative to the base, the second magnetic attractor and the driving magnet are at least partially aligned, so that the second magnetic attractor can provide lateral attraction force to the carrier during the rotational stroke of the carrier relative to the base, thereby making the carrier highly stable in the radial direction of the variable aperture throughout the entire rotational stroke.

[0031] In some possible implementations, along the circumference of the variable aperture, the widths at both ends of the second magnetic chuck are greater than the width of the middle portion of the second magnetic chuck.

[0032] In this implementation, since the width of both ends of the second magnetic component is greater than the width of the middle area, the restoring torque on the carrier generated by the magnetic attraction of the second magnetic component on the driving magnet during the rotation of the carrier relative to the base can be reduced, thereby reducing the rotational resistance of the carrier relative to the base and helping to save power consumption.

[0033] In some possible implementations, the first mounting hole includes a first sub-hole and a second sub-hole, which are connected. The first sub-hole penetrates the first peripheral side plate radially along the variable aperture, and the second sub-hole penetrates the base plate along the thickness direction of the variable aperture. The driving magnet is located in the first sub-hole, and the driving coil is located in the second sub-hole. The variable aperture also includes a circuit board, which is mounted on the side of the base plate facing away from the carrier. The circuit board covers the second sub-hole, and the driving coil is mounted on and electrically connected to the circuit board. The first magnetic attractor is mounted on the side of the circuit board facing away from the driving magnet.

[0034] In this implementation, the first mounting hole provides mounting space for the driving magnet and the driving coil, which not only improves the ease of mounting the driving magnet and the driving coil, but also avoids the first side plate from hindering the mounting of the driving coil and the driving magnet. This reduces the radial dimension of the base, thereby reducing the radial dimension of the variable aperture, which is beneficial for the miniaturization design of the variable aperture.

[0035] The second sub-hole may include a first portion and a second portion, wherein the first portion of the second sub-hole may be closer to the first through-hole than the second portion. The second portion of the second sub-hole may have a larger dimension in the circumferential direction along the variable aperture than the first portion, and both ends of the second portion of the second sub-hole extend beyond the ends of the first portion. A portion of the drive coil may be located within the first portion of the second sub-hole, and a portion of the drive coil may be located within the second portion of the second sub-hole. A plurality of first pads are provided on the circuit board, and the first pads may be exposed in the second portion of the second sub-hole. Two first pads may be located on either side of the drive coil, so that the drive coil can be electrically connected to the circuit board via the first pads.

[0036] In this implementation, since the size of the second part of the second sub-hole is larger than that of the first part, the second part of the second sub-hole can expose both the drive coil and the first pad at the same time, providing electrical connection space for the drive coil, which is beneficial for the installation of the drive coil and improves the space utilization of the base.

[0037] In some possible implementations, the base plate has a second mounting slot with its opening facing away from the driving magnet. The second mounting slot is connected to a second sub-hole, and the circuit board is mounted in the second mounting slot.

[0038] In this implementation, the design of the second mounting slot allows the circuit board to be embedded in the base plate, thereby reducing the space occupied by the circuit board and facilitating the thin and light design of the variable aperture.

[0039] The circuit board may have a third mounting slot, the opening of which may face away from the drive coil, and the first magnetic component may be located inside the third mounting slot.

[0040] In this implementation, the design of the third mounting slot allows the first magnetic component to be embedded in the circuit board, reducing the space occupied by the first magnetic component and facilitating the realization of a thin and light design for the variable aperture.

[0041] In some possible implementations, the base has multiple first protrusions arranged at intervals along the circumference of the variable aperture; the carrier has multiple second protrusions arranged at intervals along the circumference of the variable aperture, with the second protrusions being farther from the center of the variable aperture than the first protrusions; the blade has a rotating hole and a sliding hole, the rotating hole being circular and fitted onto the first protrusion, and the sliding hole being arc-shaped and fitted onto the second protrusion, the carrier being used to drive the blade to rotate along the first protrusion via the second protrusion, thereby changing the aperture size.

[0042] In this implementation, since the base is fixed and the carrier rotates relative to the base, the position of the first protrusion remains fixed, while the second protrusion moves with the carrier relative to the base. As the carrier rotates relative to the base, the second protrusion moves within the sliding hole, and by acting on the inner wall of the sliding hole, it drives the blades to rotate around the first protrusion, thereby changing the overlap surface between two adjacent blades, and thus changing the aperture size of the aperture formed by the multiple blades.

[0043] In some possible implementations, the variable aperture also includes a decorative cover with a fourth through hole. The decorative cover is mounted on the base and located on the side of the blade away from the carrier. The fourth through hole connects to the aperture hole, and the diameter of the fourth through hole is greater than or equal to the maximum diameter of the aperture hole.

[0044] In this implementation, the diameter of the fourth through hole is greater than or equal to the maximum diameter of the aperture hole, so that external light can enter the aperture hole through the fourth through hole, and the decorative cover will not block the aperture hole. The decorative cover not only serves an external decorative function but also provides dust protection.

[0045] In some possible implementations, the drive coil is energized during the process of adjusting the blade position from the first target position to the second target position; and the drive coil is de-energized when the blade position is adjusted to the second target position.

[0046] In this implementation, since the time the blades in the variable aperture are stationary is much longer than the time the blades move, that is, the time for the aperture aperture to change is less, by turning off the drive coil after the blades are in position, the stabilizing current of the variable aperture can be greatly reduced, thus reducing power consumption. This is beneficial for improving the resolution of the camera module when the variable aperture is applied to the camera module.

[0047] In this implementation, the first magnetic chuck and the driving magnet are positioned opposite each other along the thickness direction of the variable aperture, generating a magnetic attraction force in the Z-axis direction between the first magnetic chuck and the driving magnet, thus enabling the carrier to be stably connected to the base in the Z-axis direction. The second magnetic chuck and the driving magnet are positioned opposite each other along the radial direction of the variable aperture, generating a lateral magnetic attraction force between the second magnetic chuck and the driving magnet, thus enabling the carrier to be stably connected to the base in the radial direction of the variable aperture. Therefore, after the blade is adjusted to the target position, cutting off the current to the driving coil ensures the stability of the carrier and blade through the first and second magnetic chucks, guaranteeing the stability of the aperture aperture diameter, achieving power-off locking, reducing the steady-state current of the variable aperture, and reducing power consumption. This is beneficial for improving the resolution of the camera module when the variable aperture is applied.

[0048] Secondly, this application provides a camera module. The camera module includes a lens assembly and a variable aperture as described in the first aspect, wherein the variable aperture is fixedly mounted on the light-incident side of the lens assembly.

[0049] In this application, by designing the variable aperture, the steady-state current of the variable aperture is reduced, thereby reducing the power consumption of the camera module, which is beneficial to improving the overall resolution of the camera module and thus improving the imaging quality of the camera module.

[0050] Thirdly, this application provides an electronic device. It includes a housing and a camera module as described in the second aspect, the camera module being mounted on the housing.

[0051] In this application, the power-saving design of the variable aperture improves the resolution of the camera module, thereby improving the image quality and thus enhancing the user experience of the electronic device.

[0052] Fourthly, this application provides a control method. The variable aperture includes a base, a carrier, multiple blades, a drive coil, a drive magnet, and a magnetic attraction assembly; the carrier is rotatably connected to the base, the blades connect the base and the carrier, and the multiple blades surround the aperture opening; the drive coil is mounted on a base plate, the drive magnet is mounted on the carrier, and the drive coil and drive magnet are arranged opposite each other along the thickness direction of the variable aperture; the drive coil is used to drive the drive magnet to rotate the carrier relative to the base, thereby changing the aperture size; the magnetic attraction assembly is mounted on the base, and the magnetic attraction assembly is arranged opposite to the drive magnet; the method includes:

[0053] The variable aperture detects a first command, which instructs the blades to be adjusted to the target position.

[0054] In response to the first command, the variable aperture controls the blades to adjust to the target position through the closed-loop controller and executes the first switching strategy;

[0055] The first switching strategy includes:

[0056] The closed-loop controller is a proportional-integral-derivative PID controller, and the variable aperture switches the PID controller to a proportional-derivative PD controller.

[0057] or,

[0058] The variable aperture switches the closed-loop controller to an open-loop controller.

[0059] In this application, the aperture of the aperture hole is adjusted by using a variable aperture, thereby controlling the amount of light entering and the depth of field, so that the camera module can be adaptively adjusted for different shooting scenarios, thereby improving the shooting quality of the camera module in different shooting scenarios and improving the shooting capability of the camera module.

[0060] In this application, the first switching strategy is to reduce the steady-state current of the variable aperture, so that the variable aperture can reduce the steady-state current, thereby reducing power consumption and improving the resolution of the camera module.

[0061] Among some possible implementations, the method also includes the following before the variable aperture executes the first switching strategy:

[0062] The variable aperture determines whether the target position corresponds to the first position or the second position. When the target position is in the first position, the aperture has the largest aperture, and when the target position is in the second position, the aperture has the smallest aperture.

[0063] If not, the first switching strategy includes: the closed-loop controller is a PID controller, and the variable aperture switches the PID controller to a PD controller;

[0064] If so, the first switching strategy includes:

[0065] The closed-loop controller is a PID controller, and the variable aperture switches the PID controller to a PD controller;

[0066] or,

[0067] The variable aperture switches the closed-loop controller to an open-loop controller.

[0068] In this implementation, the variable aperture switches the closed-loop controller to an open-loop controller. This design allows the drive chip to switch its control of the blades from closed-loop to open-loop control. As a result, the drive chip no longer needs to adjust its control of the blades based on the blade position information feedback in real time, thereby saving the power consumed by the drive chip in processing feedback information and reducing power consumption.

[0069] In this implementation, the first and second magnetic attractors ensure the stability of the carrier in the thickness direction of the variable aperture through the magnetic attraction between the first magnetic attractor and the driving magnet, while the second magnetic attractor ensures the stability of the carrier in the radial direction of the variable aperture through the magnetic attraction between the second magnetic attractor and the driving magnet. Therefore, after the variable aperture switches the closed-loop controller to an open-loop controller, the current of the drive coil can be reduced. Thus, the drive coil can achieve stable blade operation in either the first or second position with a small current, thereby reducing power consumption.

[0070] In this implementation, since the second protrusion of the carrier abuts against the first sidewall when the blade is in the first position, the variable aperture only needs to apply a force toward the first sidewall to ensure the stability of the blade in the first position. Therefore, after the variable aperture switches the closed-loop controller to an open-loop controller, only a unidirectional current needs to be applied to the drive coil to achieve stability of the blade in the first position, which helps to reduce power consumption. Similarly, when the blade is in the second position, the second protrusion of the carrier abuts against the second sidewall. Therefore, the variable aperture only needs to apply a force toward the second sidewall to ensure the stability of the blade in the second position. Therefore, after the variable aperture switches the closed-loop controller to an open-loop controller, only a unidirectional current needs to be applied to the drive coil to achieve stability of the blade in the second position, which helps to reduce power consumption.

[0071] In this implementation, during the process of controlling the carrier's movement relative to the base to move the blades to the target position, the PID controller achieves precise control of the blade position by adjusting three parameters: the proportional coefficient Kp, the integral coefficient Ki, and the derivative coefficient Kd. Because the adjustment of the integral coefficient Ki in the PID controller exhibits saturation characteristics and hysteresis, unnecessary frictional current accumulates during the carrier's rotation relative to the base due to frictional forces. By disabling the adjustment of the integral coefficient after the blades reach the target position (i.e., shutting down the integral output) and switching the PID controller to a PD controller, the frictional disturbance current is eliminated, thereby reducing the steady-state current of the variable aperture and ultimately achieving power reduction.

[0072] Among some possible implementations, after the variable aperture switches the closed-loop controller to an open-loop controller, the method also includes:

[0073] Determine whether the current position of the blade is within the preset error range of the target position;

[0074] If so, the variable aperture continues to control the blades via the open-loop controller;

[0075] If not, the variable aperture will switch the open-loop controller to a closed-loop controller, and control the blades to adjust to the target position through the closed-loop controller.

[0076] The variable aperture switches the closed-loop controller to an open-loop controller.

[0077] In this implementation, the variable aperture can be adjusted to the target position due to external interference during the adjustment process, thereby making the aperture adjustment more precise and more resistant to risks.

[0078] Among some possible implementations, after executing the first switching strategy, the method also includes:

[0079] If the first command is not detected, when the timing duration of the variable aperture reaches the preset duration, it is determined whether the current position of the blade is the first position or the second position.

[0080] If not, the variable aperture continues to control the blades via the PD controller;

[0081] If so, the variable aperture continues to control the blades via the open-loop controller.

[0082] In this implementation, it is possible to perform cyclic detection and judgment in units of preset duration to adjust the aperture of the variable aperture.

[0083] Fifthly, this application provides an electronic device. It includes: one or more processors; one or more memories; and one or more computer programs, wherein the one or more computer programs are stored in the one or more memories, and the one or more computer programs include instructions that, when executed by the one or more processors, cause the electronic device to perform any of the methods described in the fourth aspect.

[0084] Sixthly, this application provides a computer-readable storage medium. The storage medium stores a program or instructions that, when executed, implement any of the methods described in the fourth aspect.

[0085] In a seventh aspect, this application provides a computer program product. The computer program product stores a program or instructions that, when executed, implement any of the methods described in the fourth aspect. Attached Figure Description

[0086] Figure 1A is a schematic diagram of the structure of the electronic device provided in some embodiments of this application;

[0087] Figure 1B is a partial structural exploded view of the electronic device shown in Figure 1A;

[0088] Figure 2 is a partial structural diagram of the electronic device shown in Figure 1A after being cut along line AA in some embodiments;

[0089] Figure 3 is a schematic diagram of the variable aperture in some embodiments of the electronic device shown in Figure 2;

[0090] Figure 4 is a partial structural exploded view of the variable aperture shown in Figure 3 in some embodiments;

[0091] Figure 5A is a schematic diagram of the structure of the base in the variable aperture shown in Figure 3 in some embodiments;

[0092] Figure 5B is a structural schematic diagram of the base shown in Figure 5A from another perspective;

[0093] Figure 6 is a structural schematic diagram of the base shown in Figure 5A from another perspective;

[0094] Figure 7A is a partial structural exploded view of the base shown in Figure 5A in some embodiments;

[0095] Figure 7B is a partial structural diagram of some embodiments of the base shown in Figure 5A after being cut open along line BB.

[0096] Figure 8 is a schematic diagram of the structure in which some components are installed on the base shown in Figure 5A in some embodiments;

[0097] Figure 9 is a partial structural exploded view of the structure shown in Figure 8 in some embodiments;

[0098] Figure 10A is a structural schematic diagram of the structure shown in Figure 8 from another perspective;

[0099] Figure 10B is a structural schematic diagram of the structure shown in Figure 8 from another perspective;

[0100] Figure 11A is a schematic diagram of the structure shown in Figure 8 after being cut along line CC in some embodiments;

[0101] Figure 11B is a schematic diagram of the structure shown in Figure 8 after being cut along line DD in some embodiments;

[0102] Figure 12A is a schematic diagram of the carrier in some embodiments of the variable aperture shown in Figure 3;

[0103] Figure 12B is a structural schematic diagram of the carrier shown in Figure 12A from another perspective;

[0104] Figure 13 is a partial structural exploded view of the carrier shown in Figure 12A in some embodiments;

[0105] Figure 14 is a schematic diagram of the structure of the carrier shown in Figure 12A after being cut open along line EE in some embodiments;

[0106] Figure 15A is a schematic diagram of the structure of the platform shown in Figure 12A with the driving magnet installed in some embodiments;

[0107] Figure 15B is a structural schematic diagram of the structure shown in Figure 15A from another perspective;

[0108] Figure 16 is a schematic diagram of the structure shown in Figure 15A after being cut along line FF in some embodiments;

[0109] Figure 17 is a schematic diagram of the assembly of the structure shown in Figure 15A and the structure shown in Figure 8 in some embodiments;

[0110] Figure 18 is a schematic diagram of the structure shown in Figure 17 after being cut open along line GG in some embodiments;

[0111] Figure 19A is a schematic diagram of the structure shown in Figure 17 after being cut along line H1-H1 in some embodiments;

[0112] Figure 19B is a schematic diagram of the structure shown in Figure 17 after being cut along line H2-H2 in some embodiments;

[0113] Figure 20A is a schematic diagram of the structure shown in Figure 17 after being cut along line I1-I1 in some embodiments;

[0114] Figure 20B is a schematic diagram of the structure shown in Figure 17 after being cut open along line I2-I2 in some embodiments;

[0115] Figure 21A is a schematic diagram of the structure of the gasket in the variable aperture shown in Figure 3 in some embodiments;

[0116] Figure 21B is a schematic diagram of the gasket shown in Figure 21A installed in the structure shown in Figure 17;

[0117] Figure 22A is a schematic diagram of the structure of multiple blades in the variable aperture shown in Figure 3 in some embodiments;

[0118] Figure 22B is a schematic diagram of the structure of one of the multiple blades shown in Figure 22A in some embodiments;

[0119] Figure 23A is a schematic diagram of multiple blades shown in Figure 22A installed on the structure shown in Figure 21B;

[0120] Figure 23B is a structural schematic diagram of the structure shown in Figure 23A from another perspective;

[0121] Figure 24A is a schematic diagram of the structure shown in Figure 23A after being cut open along line JJ in some embodiments;

[0122] Figure 24B is a schematic diagram of the structure shown in Figure 23A after being cut open along line KK in some embodiments;

[0123] Figure 25 is a schematic diagram of the structure of the decorative cover in the variable aperture shown in Figure 3 in some embodiments;

[0124] Figure 26 is an exploded structural diagram of the decorative cover shown in Figure 25 in some embodiments;

[0125] Figure 27 is a structural schematic diagram of one side embodiment after the decorative cover shown in Figure 25 is cut open along line LL;

[0126] Figure 28 is a schematic diagram of the structure in some embodiments after being cut open at MM along the variable aperture shown in Figure 3;

[0127] Figure 29A is a schematic diagram of the structure in some embodiments after being cut open along line N1-N1 of the variable aperture shown in Figure 3;

[0128] Figure 29B is a schematic diagram of the structure in some embodiments after being cut open along line N2-N2 of the variable aperture shown in Figure 3;

[0129] Figure 30 is a flowchart illustrating a control method provided in an embodiment of this application;

[0130] Figure 31 is a schematic diagram of the specific flow in some embodiments of the control method shown in Figure 30;

[0131] Figure 32 is a schematic diagram of steady-state current when the variable aperture uses a closed-loop controller to maintain the blade position in some embodiments;

[0132] Figure 33 is a schematic diagram of the specific flow of the control method shown in Figure 30 in some other embodiments;

[0133] Figure 34 is a schematic diagram of steady-state current when the variable aperture always uses a PID controller to control the blades in some embodiments.

[0134] Figure 35 is a schematic diagram of the steady-state current when the variable aperture switches the PID controller to the PD controller at the target position in some embodiments.

[0135] Figure 36 is a schematic diagram of the specific flow in some embodiments of the control method shown in Figure 30. Detailed Implementation

[0136] The embodiments of this application are described below with reference to the accompanying drawings.

[0137] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Multiple" refers to at least two.

[0138] The directional terms mentioned in the embodiments of this application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc., are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0139] In the embodiments of this application, the relative positional relationships mentioned, such as parallel, perpendicular, and aligned, are defined in relation to the current technological level, rather than being absolutely strict. Slight deviations are permissible; approximations of parallelism, perpendicularity, or alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0140] In the embodiments of this application, the terms "first," "second," "third," and "fourth" 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. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0141] In current mainstream mobile phone camera modules, the variable aperture architecture is glued to the lens shoulder. The power consumption of the variable aperture constantly affects the lens characteristics, and consequently, the resolution of the entire mobile phone camera module. With the increasing demand for miniaturization of the driving magnet and driving coil in the variable aperture, while ensuring sufficient driving force, the power consumption of the driving coil and driving chip has an even greater impact on the resolution of the lens and camera module.

[0142] Based on the aforementioned technical problems, this application improves the structure of the variable aperture and the control method of the variable aperture to achieve the effect of reducing current and power consumption, thereby reducing the impact on the resolution of the lens and camera module.

[0143] The specific structure of the electronic device 1000 provided in this application will be described below.

[0144] Please refer to Figures 1A and 1B. Figure 1A is a schematic diagram of the structure of the electronic device 1000 provided in some embodiments of this application; Figure 1B is a partial exploded view of the electronic device 1000 shown in Figure 1A.

[0145] In some embodiments, the electronic device 1000 can be a mobile phone, tablet personal computer, laptop computer, smart screen, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device, augmented reality (AR) glasses, AR headset, virtual reality (VR) glasses, or VR headset, or other devices with camera functionality. In the embodiment shown in Figure 1A, a mobile phone is used as an example for description. Of course, other types of electronic devices 1000 can also adopt a similar structure, which will not be elaborated further below.

[0146] It is understood that Figures 1A and 1B only schematically show some of the components included in the electronic device 1000. The actual shape, size, location and construction of these components are not limited by Figures 1A and 1B. The electronic device 1000 may also include more or fewer components than those in Figures 1A and 1B.

[0147] In some embodiments, the electronic device 1000 may include a camera module 100, a screen 200, and a housing 300. The screen 200 is used to display images, videos, etc. The screen 200 may include a light-transmitting panel 2001 and a display screen 2002. The light-transmitting panel 2001 and the display screen 2002 are stacked and fixedly connected. The light-transmitting panel 2001 mainly serves to protect the display screen 2002 from dust. The material of the light-transmitting panel 2001 includes, but is not limited to, glass. The display screen 2002 may be a flexible display screen or a rigid display screen. For example, the display screen 2002 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0148] For example, the housing 300 is used to protect the internal electronic components of the electronic device 1000. The housing 300 may include a cover plate 3001, a frame 3002, and a camera decorative element 3003. The cover plate 3001 is located on the side of the display screen 2002 away from the light-transmitting panel 2001, and is stacked with the light-transmitting panel 2001 and the display screen 2002. The frame 3002 is fixed to the cover plate 3001. For example, the frame 3002 can be fixedly connected to the cover plate 3001 by adhesive. The frame 3002 may also be integrally formed with the cover plate 3001, that is, the frame 3002 and the cover plate 3001 are a single structure. The frame 3002 is located between the cover plate 3001 and the light-transmitting panel 2001. The light-transmitting panel 2001 can be fixed to the frame 3002 by adhesive. The light-transmitting panel 2001, the cover plate 3001, and the frame 3002 form an internal accommodating space of the electronic device 1000. The internal space accommodates the display screen 2002. The cover plate 3001 can be made of materials such as metal, plastic, or glass. The cover plate 3001 can be a single-material panel or a panel structure composed of multiple materials and panels. The cover plate 3001 has a mounting opening 3004, and the camera decorative piece 3003 covers and is fixed to the mounting opening 3004.

[0149] For example, camera module 100 is used to capture photos / videos. For example, camera module 100 is mounted within housing 300, located within the internal accommodating space of electronic device 1000. Camera module 100 can be used as a rear-facing camera. For example, the light-incident surface of camera module 100 faces camera trim 3003. Camera trim 3003 is used to protect camera module 100.

[0150] In some embodiments, the camera trim 3003 protrudes from the side of the cover plate 3001 away from the light-transmitting panel 2001. This increases the mounting space for the camera module 100 in the thickness direction of the electronic device 1000. In other embodiments, the camera trim 3003 may be flush with the cover plate 3001 or recessed into the internal accommodating space of the electronic device 1000.

[0151] The camera decorative element 3003 has a light-transmitting hole 3005. The light-transmitting hole 3005 allows light from objects to enter the light-receiving surface of the camera module 100. In some other embodiments, the electronic device 1000 may not include the camera decorative element 3003. In this case, the cover plate 3001 no longer has a mounting opening 3004, but the light-transmitting hole 3005 is provided on the cover plate 3001, allowing light from objects to enter the light-receiving surface of the camera module 100.

[0152] In some embodiments, the camera module 100 can also be used as a front-facing camera. For example, the light-incident surface of the camera module 100 faces the light-transmitting panel 2001. The display screen 2002 is provided with a light-path obstruction hole. This light-path obstruction hole allows light from the scene to pass through the light-transmitting panel 2001 and then enter the light-incident surface of the camera module 100. In some embodiments, the electronic device 1000 may also include one or more other camera modules (not shown in the figures), which are not strictly limited in this application.

[0153] In some embodiments, as shown in FIG1B, the electronic device 1000 may further include a circuit board assembly 400 and an image processor 500. The circuit board assembly 400 and the image processor 500 are located within the internal accommodating space of the electronic device 1000. The image processor 500 is fixed to and electrically connected to the circuit board assembly 400. The image processor 500 is communicatively connected to the camera module 100. The image processor 500 is used to acquire image data from the camera module 100 and process the image data. The communication connection between the camera module 100 and the image processor 500 may include data transmission via electrical connections such as wiring, or data transmission may be achieved through coupling or other means. It is understood that the camera module 100 and the image processor 500 may also achieve a communication connection through other methods capable of data transmission.

[0154] In some embodiments, the electronic device 1000 may further include an analog-to-digital converter (also known as an A / D converter, not shown in the figure). The analog-to-digital converter is connected between the camera module 100 and the image processor 500. The analog-to-digital converter is used to convert the signal generated by the camera module 100 into a digital image signal and transmit it to the image processor 500, whereby the image processor 500 processes the digital image signal and finally displays the image or video on the screen 200.

[0155] In some embodiments, the electronic device 1000 may further include a memory (not shown in the figure), which is communicatively connected to the image processor 500. The image processor 500 processes the digital image signal and then transmits the image to the memory, so that the image can be retrieved from the memory and displayed on the screen 200 at any time when it is needed to view the image later. In some embodiments, the image processor 500 may also compress the processed digital image signal before storing it in the memory to save memory space.

[0156] In some other embodiments, the electronic device 1000 may also not include the screen 200.

[0157] It is understood that the installation position of the camera module 100 in the electronic device 1000 of the embodiments shown in Figures 1A and 1B is merely illustrative, and this application does not strictly limit the installation position of the camera module 100. In some other embodiments, the camera module 100 may also be installed in other locations on the electronic device 1000, for example, the camera module 100 may be installed in the upper middle or upper right corner of the back of the electronic device 1000. In some other embodiments, the electronic device 1000 may include a terminal body 211 and an auxiliary component that can rotate, move, or be detached relative to the terminal body 211, and the camera module 100 may also be disposed on the auxiliary component.

[0158] To facilitate the description of the specific structure and relative positional relationships of the electronic device 1000, coordinate directions are defined. Specifically, the direction parallel to the width of the electronic device 1000 is defined as the X-axis, the direction parallel to the length of the electronic device 1000 is defined as the Y-axis, and the direction parallel to the thickness of the electronic device 1000 is defined as the Z-axis. It is understood that in this application, the above-described coordinate directions are only used to illustrate the attitude and relative positional relationships of the electronic device 1000 and its components in the accompanying drawings, and do not limit the specific positions of the electronic device 1000 and its components. It is understood that in some other embodiments, coordinate directions may be defined using other references, which are not limited here.

[0159] Please refer to Figures 1A and 2. Figure 2 is a partial structural diagram of the electronic device 1000 shown in Figure 1A after being cut open along line AA in some embodiments.

[0160] In some embodiments, the camera module 100 may include a variable aperture 10 and a lens assembly 20. The variable aperture 10 is fixedly mounted on the light-incident side of the lens assembly 20. The variable aperture 10 has an aperture hole 221, and the aperture 10 can adjust the size of the aperture hole 221. Light can enter from the light-transmitting hole 3005 of the camera decorative element 3003 to the aperture hole 221, and then pass through the aperture hole 221 to enter the lens assembly 20 to achieve imaging.

[0161] In this embodiment, the aperture of the aperture hole 221 is adjusted by the variable aperture 10, thereby controlling the amount of light entering and the depth of field, so that the camera module 100 can be adaptively adjusted for different shooting scenarios, thereby improving the shooting quality of the camera module 100 in different shooting scenarios and improving the shooting capability of the camera module 100.

[0162] Please refer to Figures 3 and 4. Figure 3 is a structural schematic diagram of the variable aperture 10 in some embodiments of the electronic device 1000 shown in Figure 2; Figure 4 is a partial structural exploded schematic diagram of the variable aperture 10 shown in Figure 3 in some embodiments.

[0163] In some embodiments, the variable aperture 10 may include a stator 1, a mover 2, a rolling element 3, and a decorative cover 4. The rolling element 3 may be disposed between the stator 1 and the mover 2 so that the mover 2 can rotate relative to the stator 1 via the rolling element 3. The decorative cover 4 may be installed on the stator 1 for decoration and dust protection.

[0164] For example, the stator 1 may include a base 11, a magnetic assembly 12, a circuit assembly 13, and a spacer 14. The magnetic assembly 12, the circuit assembly 13, and the spacer 14 may all be mounted on the base 11.

[0165] The circuit assembly 13 may include a circuit board 131, a drive coil 132, a drive chip 133, and a capacitor 134. The circuit board 131 can be mounted on the base 11 and is used for external circuitry. The drive coil 132 can be mounted on and electrically connected to the circuit board 131 to connect to an external power source. The drive chip 133 can be mounted on and electrically connected to the circuit board 131, and can control the drive coil 132. The capacitor 134 can be mounted on and electrically connected to the circuit board 131, and can perform current filtering.

[0166] For example, the magnetic component 12 may include a first magnetic member 121 and a second magnetic member 122.

[0167] The first magnetic component 121 can be mounted on the circuit board 131, that is, the first magnetic component 121 is mounted on the base 11 through the circuit board 131.

[0168] For example, the mover 2 may include a carrier 21, multiple blades 22, and a driving magnet 23. The blades 22 may connect the base 11 and the carrier 21, and the multiple blades 22 may form an aperture 221. The driving magnet 23 may be mounted on the carrier 21.

[0169] The magnetic attraction component 12 can be arranged opposite to the driving magnet 23 to improve the structural stability between the carrier 21 and the base 11.

[0170] It is understood that Figures 3 and 4 only schematically show some of the components included in the variable aperture 10. The actual shape, size, position and construction of these components are not limited by Figures 3 and 4. The variable aperture 10 may also include more or fewer components than those in Figures 3 and 4.

[0171] Please refer to Figures 5A to 6. Figure 5A is a structural schematic diagram of the base 11 in the variable aperture 10 shown in Figure 3 in some embodiments; Figure 5B is a structural schematic diagram of the base 11 shown in Figure 5A from another perspective; and Figure 6 is a structural schematic diagram of the base 11 shown in Figure 5A from yet another perspective.

[0172] In some embodiments, the base 11 may include a base plate 111, a first peripheral side plate 112, a second peripheral side plate 113, and a plurality of support platforms 114. The base plate 111 may have a first through hole 1111, the first peripheral side plate 112 is connected to the periphery of the base plate 111, and the second peripheral side plate 113 is connected to the periphery of the first through hole 1111. The first peripheral side plate 112 and the second peripheral side plate 113 protrude from the same side of the base plate 111, and the first peripheral side plate 112, the second peripheral side plate 113, and the base plate 111 enclose a first mounting space 115. The plurality of support platforms 114 are arranged at intervals along the circumference of the variable aperture 10, the support platforms 114 are located within the first mounting space 115, and are connected to the first peripheral side plate 112.

[0173] For example, the base 11 may have a first mounting hole 116, which may include a first sub-hole 1161 and a second sub-hole 1162, which are connected. The first sub-hole 1161 penetrates the first peripheral side plate 112 radially along the variable aperture 10, and the second sub-hole 1162 penetrates the base plate 111 along the thickness direction of the variable aperture 10.

[0174] The second sub-aperture 1162 may include a first portion 1162a and a second portion 1162b. The first portion 1162a of the second sub-aperture 1162 may be closer to the first through-hole 1111 than the second portion 1162b. The second portion 1162b of the second sub-aperture 1162 may have a larger dimension in the circumferential direction along the variable aperture 10 than the first portion 1162a, and both ends of the second portion 1162b of the second sub-aperture 1162 may extend beyond both ends of the first portion 1162a.

[0175] The first sub-hole 1161 can also penetrate the surface of the first side plate 112 facing away from the bottom plate 111.

[0176] The first mounting hole 116 may have a first sidewall 1121 and a second sidewall 1122 on the first peripheral side plate 112, that is, the first sub-hole 1161 may have a first sidewall 1121 and a second sidewall 1122 on the first peripheral side plate 112. The first sidewall 1121 and the second sidewall 1122 may be arranged opposite to each other along the circumference of the variable aperture 10.

[0177] For example, there can be multiple first mounting holes 116, and the multiple first mounting holes 116 can be set at circumferential intervals along the variable aperture 10.

[0178] The plurality of first mounting holes 116 can be evenly spaced along the circumference of the variable aperture 10.

[0179] The number of first mounting holes 116 can be two, and the two first mounting holes 116 can be symmetrically arranged along the center of the variable aperture 10.

[0180] For example, the first peripheral side plate 112 may also have a plurality of material reduction holes 1123, which are arranged at intervals along the circumference of the variable aperture 10. The material reduction holes 1123 penetrate the first peripheral side plate 112 radially along the variable aperture 10. The material reduction holes 1123 are spaced apart from the first sub-holes 1161. The material reduction holes 1123 can achieve the effects of reducing material, lowering costs, and reducing weight.

[0181] The first peripheral side plate 112 is divided into multiple first mounting plates 1124 and multiple second mounting plates 1125 by the design of the material reduction hole 1123 and the first sub-hole 1161. The first sub-hole 1161 is located between two adjacent first mounting plates 1124, and the material reduction hole 1123 is located between the first mounting plate 1124 and the second mounting plate 1125.

[0182] For example, the base 11 may also include a plurality of mounting posts 117, which protrude from the side of the first mounting plate 1124 facing away from the base plate 111. One or more mounting posts 117 may be provided on a single first mounting plate 1124.

[0183] For example, the second peripheral side plate 113 may be provided to form a second through hole 1131, which is connected to the first through hole 1111.

[0184] The base 11 may also include a plurality of first protrusions 118, which may be arranged at intervals along the circumference of the variable aperture 10. The first protrusions 118 may protrude from the side of the second peripheral side plate 113 facing away from the base plate 111.

[0185] For example, the base 11 may further include a first mounting platform 119, which protrudes from the side of the second peripheral side plate 113 facing the first mounting hole 116. It should be noted that the base 11 may include only one first mounting platform 119, and the first mounting platform 119 is provided for only one of the multiple first mounting holes 116.

[0186] Specifically, a first mounting platform 119 is provided at the second peripheral side plate 113, and the surface of the second peripheral side plate 113 facing the first mounting hole 116 can be a plane.

[0187] The surface of the first mounting platform 119 facing away from the base plate 111 can be a plane.

[0188] For example, the side of the support platform 114 away from the first peripheral side plate 112 may be provided with a first mounting groove 1141, which penetrates the surface of the support platform 114 away from the bottom plate 111 and the surface of the support platform 114 facing the second peripheral side plate 113.

[0189] The support platform 114 may have a first support surface 1142 and a second support surface 1143 facing away from the base plate 111. The first support surface 1142 and the second support surface 1143 are located on both sides of the first mounting groove 1141, and the first support surface 1142 is farther away from the base plate 111 than the second support surface 1143, that is, the first support surface 1142 is higher than the second support surface 1143.

[0190] For example, the base plate 111 may also have a second mounting groove 1112, the opening of which faces away from the first peripheral side plate 112, that is, the second mounting groove 1112 is located on the side of the base plate 111 facing away from the first peripheral side plate 112. The second mounting groove 1112 communicates with the second sub-hole 1162.

[0191] For example, the base 11 may also have a second mounting platform 120, which protrudes from the base plate 111 on the side facing away from the first peripheral side plate 112. The second mounting platform 120 is used to cooperate with the lens assembly 20 when the variable aperture 10 is mounted on the lens assembly 20, thereby improving the stability of the installation.

[0192] For example, the base plate 111 may also be provided with a second mounting hole 1113, which penetrates the base plate 111 along the thickness direction of the variable aperture 10.

[0193] The second mounting hole 1113 may be located adjacent to the first mounting hole 116.

[0194] Please refer to Figures 5A, 7A and 7B. Figure 7A is a partial exploded view of the base 11 shown in Figure 5A in some embodiments; Figure 7B is a partial structural view of the base 11 shown in Figure 5A after being cut along line BB in some embodiments.

[0195] In some embodiments, the base 11 may include a seat body 11a and a first frame 11b, with the first frame 11b embedded within the seat body 11a to improve the overall structural stability of the base 11.

[0196] For example, the first frame 11b may include a first part 11ba and a second part 11bb. The first part 11ba of the first frame 11b is embedded in the base plate 111, the second part 11bb of the first frame 11b is connected to the first part 11ba, and the second part 11bb of the first frame 11b is embedded in the first peripheral side plate 112. By supporting and reinforcing both the base plate 111 and the first peripheral side plate 112, the overall structural stability of the base 11 is further improved.

[0197] The first part 11ba of the first frame 11b can be provided with a clearance structure to avoid the first mounting hole 116, that is, the first frame 11b will not be exposed at the first mounting hole 116 of the base 11.

[0198] For example, the first frame 11b can be a hard material such as metal or ceramic, while the base 11a can be a material that is easy to process and mold, such as plastic. In this way, the base 11a is easy to process and manufacture, and the first frame 11b provides strength support, making the base 11 easy to manufacture and structurally strong.

[0199] Please refer to Figures 8, 9 and 10A. Figure 8 is a structural schematic diagram of the base 11 shown in Figure 5A in some embodiments, showing the installation of some components; Figure 9 is a partial exploded view of the structure shown in Figure 8 in some embodiments; and Figure 10A is a structural schematic diagram of the structure shown in Figure 8 from another perspective.

[0200] In some embodiments, the base 11 may mount the circuit assembly 13, the first magnetic member 121, the second magnetic member 122, and the rolling member 3.

[0201] For example, the circuit assembly 13 can be mounted on the side of the base plate 111 facing away from the first peripheral side plate 112. At least a portion of the drive coil 132 is located in the first mounting hole 116, with one drive coil 132 corresponding to one first mounting hole 116.

[0202] In this embodiment, the design of the first mounting hole 116 allows the drive coil 132 to be exposed through it. The drive coil 132 at least partially overlaps with the base plate 111 in the Z-axis direction along the thickness of the variable aperture 10, thereby reducing the dimensional space occupied by the drive coil 132 in the thickness direction of the variable aperture 10, which is beneficial for achieving a thinner design of the variable aperture 10. In addition, the provision of the first mounting hole 116 also enables a material reduction design for the base 11, which can reduce the weight of the base 11 and is beneficial for the lightweight design of the variable aperture 10.

[0203] The circuit board 131 can cover the second sub-hole 1162. A portion of the drive coil 132 can be located within the first portion 1162a of the second sub-hole 1162, and a portion of the drive coil 132 can be located within the second portion 1162b of the second sub-hole 1162. The circuit board 131 is provided with a plurality of first pads 1311. The first pads 1311 can be exposed in the second portion 1162b of the second sub-hole 1162, and two first pads 1311 can be located on opposite sides of the drive coil 132, so that the drive coil 132 can be electrically connected to the circuit board 131 via the first pads 1311.

[0204] In this embodiment, since the size of the second part 1162b of the second sub-hole 1162 is larger than that of the first part 1162a, the second part 1162b of the second sub-hole 1162 can expose both the drive coil 132 and the first pad 1311 at the same time, providing electrical connection space for the drive coil 132, which is beneficial for the installation of the drive coil 132 and improves the space utilization of the base 11.

[0205] The drive coil 132 can be arranged to form a second mounting space, and the drive chip 133 can be located in the second mounting space and electrically connected to the circuit board 131.

[0206] In this embodiment, installing the driver chip 133 inside the driver coil 132 not only facilitates the control of the driver chip 133 over the driver coil 132, but also helps to save space and improve the space utilization of the variable aperture 10.

[0207] The capacitor 134 can be exposed through the second mounting hole 1113.

[0208] In this embodiment, by providing a second mounting hole 1113 to accommodate the capacitor 134, space is saved, reducing the additional space occupied by the circuit component 13 in the thickness direction of the variable aperture 10, thereby achieving a thinner and lighter design for the variable aperture 10. Furthermore, since the second mounting hole 1113 is located adjacent to the first mounting hole 116, the capacitor 134 is located near the drive coil 132 and the drive chip 133. The capacitor 134 can provide current filtering for the drive coil 132 and the drive chip 133, thereby improving the transmission quality of the electrical signal and allowing the drive chip 133 to better control the drive coil 132.

[0209] For example, the second magnetic member 122 is located in the first mounting space 115 and is mounted on the surface of the second peripheral side plate 113 facing the first peripheral side plate 112.

[0210] In this embodiment, since the surface of the second peripheral side plate 113 facing the first mounting hole 116 is a plane, it is beneficial to improve the stability of the second magnetic suction member 122 installed on the second peripheral side plate 113.

[0211] The second magnetic accumulator 122 can be installed on the side of the first mounting platform 119 facing away from the base plate 111.

[0212] In this embodiment, since the surface of the first mounting platform 119 facing away from the base plate 111 is flat, it is beneficial to improve the stability of the second magnetic suction member 122 when it is mounted on the first mounting platform 119.

[0213] The second magnetic accumulator 122 can be elongated along the circumference of the variable aperture 10, and the width of both ends of the second magnetic accumulator 122 can be greater than the width of the middle part of the second magnetic accumulator 122.

[0214] For example, the rolling element 3 can be located in the first mounting groove 1141 of the support platform 114, and the support platform 114 provides limiting support for the rolling element 3 to prevent the rolling element 3 from dislodging from the first mounting groove 1141.

[0215] Please refer to Figures 10B to 11B. Figure 10B is a structural schematic diagram of the structure shown in Figure 8 from another perspective; Figure 11A is a structural schematic diagram of the structure shown in Figure 8 after being cut along line CC in some embodiments; Figure 11B is a structural schematic diagram of the structure shown in Figure 8 after being cut along line DD in some embodiments.

[0216] In some embodiments, the first magnetic member 121 may be mounted on the base 11 and located on the side of the drive coil 132 opposite to the drive coil 132.

[0217] For example, the first magnetic member 121 can be installed on the side of the circuit board 131 facing away from the drive coil 132, thereby enabling the first magnetic member 121 to be installed on the base 11.

[0218] For example, the base plate 111 may have a second mounting groove 1112, the opening of which faces away from the first peripheral side plate 112, and the second mounting groove 1112 may communicate with a second sub-hole 1162. The circuit board 131 may be mounted in the second mounting groove 1112.

[0219] In this embodiment, the design of the second mounting slot 1112 allows the circuit board 131 to be embedded in the base plate 111, thereby reducing the space occupied by the circuit board 131 and facilitating the thin and light design of the variable aperture 10.

[0220] The circuit board 131 may be provided with a third mounting groove 1312, the opening of the third mounting groove 1312 may face away from the drive coil 132, and the first magnetic member 121 may be located in the third mounting groove 1312.

[0221] In this embodiment, the design of the third mounting slot 1312 allows the first magnetic member 121 to be embedded in the circuit board 131, which reduces the space occupied by the first magnetic member 121 and facilitates the thin and light design of the variable aperture 10.

[0222] In some embodiments, the plurality of rolling elements 3 may include a first ball 31 and a second ball 32, wherein the first ball 31 is closer to the second magnetic element 122 than the second ball 32.

[0223] For example, the drive coil 132 corresponding to the second magnetic member 122 can be referred to as the first drive coil 132a, and the drive coil 132 located elsewhere can be referred to as the second drive coil 132b. The rolling elements 3 mounted on the support platforms 114 on both sides of the first drive coil 132a are first balls 31, and the rolling elements 3 mounted on the support platforms 114 on both sides of the second drive coil 132 are second balls 32.

[0224] For example, in the support platform 114, since the first support surface 1142 is higher than the second support surface 1143, the rolling element 3 can be installed via the second support surface 1143, which facilitates the installation of the rolling element 3.

[0225] Please refer to Figures 12A and 12B. Figure 12A is a structural schematic diagram of the carrier 21 in the variable aperture 10 shown in Figure 3 in some embodiments; Figure 12B is a structural schematic diagram of the carrier 21 shown in Figure 12A from another perspective.

[0226] In some embodiments, the carrier 21 may include a body 211, a plurality of first protrusions 212, and a plurality of second protrusions 213. The body 211 may have a ring-shaped structure, having an inner ring surface 2111 and an outer ring surface 2112 disposed opposite to each other. The first protrusions 212 are connected to one side of the body 211, and the first protrusions 212 are closer to the inner ring surface 2111 than the outer ring surface 2112. The second protrusions 213 are connected to the outer ring surface 2112 of the body 211.

[0227] For example, the body 211 may have a top surface 2113 and a bottom surface 2114 disposed opposite to each other. The top surface 2113 is connected between the outer ring surface 2112 and the inner ring surface 2111, and the bottom surface 2114 is connected between the outer ring surface 2112 and the inner ring surface 2111. The first protrusion 212 is connected to the inner ring surface 2111.

[0228] The carrier 21 may also have a fourth mounting groove 214, with a portion of the fourth mounting groove 214 disposed on the bottom surface 2114 and the other portion disposed on the second protrusion 213.

[0229] For example, the carrier 21 may have a plurality of second protrusions 215 arranged circumferentially along the variable aperture 10, and the second protrusions 215 are disposed on the top surface 2113.

[0230] Please refer to Figures 13 and 14. Figure 13 is a partial exploded view of the carrier 21 shown in Figure 12A in some embodiments; Figure 14 is a structural diagram of the carrier 21 shown in Figure 12A after being cut along line EE in some embodiments.

[0231] In some embodiments, the carrier 21 may include a main body 21a and a second skeleton 21b. The second skeleton 21b may be embedded within the main body 21a to improve the overall structural strength of the carrier 21.

[0232] For example, the second skeleton 21b may include a first part 21ba and a second part 21bb connected together. The first part 21ba of the second skeleton 21b is embedded in the body 211, and the second part 21bb of the second skeleton 21b is embedded in the second protrusion 213. This is equivalent to strengthening the structure of the body 21a by using the second part 21bb of the second skeleton 21b as an extension of the body 21a, thereby further improving the overall structural strength of the carrier 21.

[0233] The second part 21bb of the second frame 21b can be exposed in the fourth mounting slot 214.

[0234] For example, the second skeleton 21b can be a hard material such as metal or ceramic, while the main body 21a can be a material that is easy to process and mold, such as plastic. In this way, the main body 21a is easy to process and manufacture, and the second skeleton 21b provides strength support, making the carrier 21 easy to manufacture and with high structural strength.

[0235] Please refer to Figures 15A to 16. Figure 15A is a structural schematic diagram of the platform shown in Figure 12A with the driving magnet 23 installed in some embodiments; Figure 15B is a structural schematic diagram of the structure shown in Figure 15A from another perspective; Figure 16 is a structural schematic diagram of the structure shown in Figure 15A after being cut along line FF in some embodiments.

[0236] In some embodiments, the driving magnet 23 may be mounted on the carrier 21. Specifically, a portion of the driving magnet 23 is mounted on the body 211, and another portion of the driving magnet 23 is mounted on the second protrusion 213.

[0237] For example, the driving magnet 23 can be installed in the fourth mounting slot 214. The design of the fourth mounting slot 214 can improve the stability of the driving magnet 23 installed on the carrier 21.

[0238] The second part 21bb of the second skeleton 21b can be made of magnetic material. This design can improve the stability of the driving magnet 23 installed on the carrier 21 and also provide magnetic field guidance for the driving magnet 23.

[0239] Each driving magnet 23 may include multiple magnets. For example, the driving magnet 23 may include a first magnet 231, a second magnet 232, and a third magnet 233, with the second magnet 232 connected between the first magnet 231 and the third magnet 233. The N-pole of the first magnet 231 may face away from the body 211, the N-pole of the second magnet 232 may face the third magnet 233, and the N-pole of the third magnet 233 may face the body 211. The structure of the driving magnet 23 shown in Figure 15B can be called a Heilbeck magnet, which increases the magnetic field strength of the driving magnet 23.

[0240] It should be noted that the number and polarity of the magnets shown in Figure 15B are for illustrative purposes only and do not limit the number of magnets in the driving magnet 23 or the polarity of each magnet. Understandably, in some other embodiments, the driving magnet 23 may also include two magnets, and the magnetic pole faces of the two magnets may face opposite directions.

[0241] Please refer to Figures 17 and 18. Figure 17 is a schematic diagram of the assembly of the structure shown in Figure 15A and the structure shown in Figure 8 in some embodiments; Figure 18 is a schematic diagram of the structure shown in Figure 17 after being cut open along line GG in some embodiments.

[0242] In some embodiments, both the driving magnet 23 and the driving coil 132 may be at least partially located in the first mounting hole 116. Specifically, a portion of the driving magnet 23 is located in the first sub-hole 1161, a portion of the driving coil 132 is located in the first sub-hole 1161, and a portion of the driving coil 132 is located in the second sub-hole 1162.

[0243] In this embodiment, the first mounting hole 116 provides mounting space for the driving magnet 23 and the driving coil 132, which can improve the ease of installation of the driving magnet 23 and the driving coil 132, and also avoid the first peripheral side plate 112 from hindering the installation of the driving coil 132 and the driving magnet 23. This can reduce the radial dimension of the base 11, thereby reducing the radial dimension of the variable aperture 10, which is beneficial to the miniaturization design of the variable aperture 10.

[0244] In this embodiment, since the multiple first mounting holes 116 can be evenly spaced along the circumference of the variable aperture 10, the driving magnet 23 and the driving coil 132 can also be evenly spaced along the axial direction of the variable aperture 10. Thus, through the cooperation of the driving magnet 23 and the driving coil 132, the stability of the carrier 21 rotating relative to the base 11 can be improved.

[0245] In this embodiment, when there are two first mounting holes 116, the two first mounting holes 116 can be symmetrically arranged along the center of the variable aperture 10. In this way, the stability of the carrier 21 rotating relative to the base 11 can be improved by the cooperation of the driving magnet 23 and the driving coil 132.

[0246] For example, the driving magnet 23 can be arranged opposite to the driving coil 132 along the thickness direction of the variable aperture 10, that is, the driving magnet 23 can be arranged opposite to the driving coil 132 along the Z-axis direction, forming a flat coil structure. The driving magnet 23 and the driving coil 132 can constitute a driving component. After the driving coil 132 is energized, it can generate a Lorentz force under the action of the magnetic field of the driving magnet 23. Through the action of the Lorentz force, the driving magnet 23 can be driven to move relative to the driving coil 132, thereby realizing the rotation of the carrier 21 relative to the base 11.

[0247] For example, the first magnetic attractor 121 can be arranged opposite to the driving magnet 23 along the thickness direction of the variable aperture 10 to achieve magnetic attraction of the driving magnet 23 in the thickness direction of the variable aperture 10, which is beneficial to the stability of the carrier 21 in the thickness direction of the variable aperture 10.

[0248] The number of first magnetic attractors 121 can be the same as the number of driving magnets 23, and one first magnetic attractor 121 corresponds to one driving magnet 23, so as to ensure that in each area where the driving magnet 23 is set, the first magnetic attractor 121 can be magnetically attracted to the driving magnet 23, thereby improving the connection stability between the carrier 21 and the base 11 in the Z-axis direction.

[0249] In the rotational stroke of the carrier 21 relative to the base 11, the first magnetic attractor 121 and the driving magnet 23 are at least partially facing each other, so that the first magnetic attractor 121 can provide the carrier 21 with an attraction force in the Z-axis direction in the rotational stroke of the carrier 21 relative to the base 11, thereby making the carrier 21 highly stable in the Z-axis direction throughout the entire rotational stroke.

[0250] For example, the second magnetic attractor 122 can be arranged opposite to the driving magnet 23 in the radial direction of the variable aperture 10 to achieve magnetic attraction of the driving magnet 23 in the radial direction of the variable aperture 10, which is beneficial to the stability of the carrier 21 in the radial direction of the variable aperture 10.

[0251] The second magnetic attractor 122 is set to correspond to only one of the multiple driving magnets 23, so that the carrier 21 is only subjected to lateral magnetic attraction in one direction, which is beneficial to the stability of the carrier 21 in the radial direction of the variable aperture 10.

[0252] In this case, during the rotational stroke of the carrier 21 relative to the base 11, the second magnetic attractor 122 and the driving magnet 23 are at least partially facing each other, so that the second magnetic attractor 122 can provide lateral attraction force to the carrier 21 during the rotational stroke of the carrier 21 relative to the base 11, thereby making the carrier 21 highly stable in the radial direction of the variable aperture 10 throughout the entire rotational stroke.

[0253] Please refer to Figures 19A to 20B. Figure 19A is a schematic diagram of the structure shown in Figure 17 after being cut along line H1-H1 in some embodiments; Figure 19B is a schematic diagram of the structure shown in Figure 17 after being cut along line H2-H2 in some embodiments; Figure 20A is a schematic diagram of the structure shown in Figure 17 after being cut along line I1-I1 in some embodiments; Figure 20B is a schematic diagram of the structure shown in Figure 17 after being cut along line I2-I2 in some embodiments.

[0254] In some embodiments, the carrier 21 may be fitted onto the outside of the second peripheral side plate 113. The body 211 and the first protrusion 212 may be located within the first mounting space 115, and the second protrusion 213 may be located within the first mounting hole 116.

[0255] In this embodiment, due to the structural configuration of the base 11, the carrier 21 can be partially installed in the first installation space 115 and fitted onto the outside of the second peripheral side plate 113. This design helps to improve the stability of the carrier 21 installed on the base 11 and improves the space utilization rate.

[0256] In this case, since the carrier 21 is fitted on the outside of the second peripheral side plate 113, the second protrusion 215 of the carrier 21 is further away from the center of the variable aperture 10 than the first protrusion 118 of the base 11.

[0257] For example, the surface of the body 211 facing the base plate 111 can abut against the first bearing surface 1142, that is, the bottom surface 2114 of the body 211 can abut against the first bearing surface 1142, so that the base 11 can provide support for the carrier 21 in the Z-axis direction through the first bearing surface 1142. In addition, since the first bearing surface 1142 is higher than the second bearing surface, there is a gap between the body 211 and the second bearing surface, which can avoid the contact surface between the body 211 and the support platform 114 being too large and resulting in excessive friction. This design can reduce the frictional resistance of the base 11 on the carrier 21 while ensuring that the base 11 provides relatively stable support for the carrier 21, which is conducive to the carrier 21 rotating better relative to the base 11.

[0258] For example, the surface of the first protrusion 212 facing the outer ring surface 2112 of the body 211 can abut against the rolling element 3, and the arrangement of the rolling element 3 enables the carrier 21 to rotate relative to the base 11.

[0259] Among the multiple rolling elements 3, since the first ball 31 is closer to the second magnetic attractor 122 than the second ball 32, under the action of the second magnetic attractor 122, the carrier 21 moves towards the second ball 32 under the drive of the driving magnet 23, so that the carrier 21 abuts against the second ball 32 in the radial direction of the variable aperture 10, and the second ball 32 abuts against the base 11 in the radial direction of the variable aperture 10. This not only achieves the stability of the carrier 21 in the radial direction of the variable aperture 10, but also helps to improve the contact stability between the carrier 21 and the second ball 32, and helps to provide rolling friction for the carrier 21 through the second ball 32, so as to better realize the rotation of the carrier 21 relative to the base 11.

[0260] It should be noted that there is usually an installation allowance between the multiple rolling elements 3 so that the carrier 21 can be installed between them. In this case, under the action of the second magnetic suction element 122, the carrier 21 abuts against the second rolling element 3, and there is a gap d1 between the carrier 21 and the first ball 31. It can be understood that in some other embodiments, the multiple rolling elements 3 may not have an installation allowance for the installation of the carrier 21. In this case, the carrier 21 abuts against both the first rolling element 3 and the second rolling element 3.

[0261] Please refer to Figures 21A and 21B. Figure 21A is a structural schematic diagram of the gasket 14 in the variable aperture 10 shown in Figure 3 in some embodiments; Figure 21B is a structural schematic diagram of the gasket 14 shown in Figure 21A installed in the structure shown in Figure 17.

[0262] In some embodiments, the periphery of the gasket 14 may be provided with a plurality of first openings 141, which are spaced apart circumferentially along the gasket 14. The first openings 141 penetrate the gasket 14 along its thickness direction and also penetrate the edge of the gasket 14. The gasket 14 can be mounted on the second peripheral side plate 113 of the base 11, and the first openings 141 are engaged with mounting posts 117 located on the second peripheral side plate 113. The gasket 14 also has a third through hole 142, which penetrates the gasket 14 along its thickness direction and connects to the second through hole 1131 of the base 11.

[0263] In this embodiment, the gasket 14 serves as a dustproof protection, preventing external impurities from entering the interior of the variable aperture 10. The gasket 14 is connected to the mounting post 117 through the first opening 141, which improves the stability of the gasket 14 when mounted on the base 11.

[0264] Please refer to Figures 22A and 22B. Figure 22A is a schematic diagram of the structure of multiple blades 22 in the variable aperture 10 shown in Figure 3 in some embodiments; Figure 22B is a schematic diagram of the structure of one of the multiple blades 22 shown in Figure 22A in some embodiments.

[0265] In some embodiments, multiple blades 22 can be arranged to form an aperture 221. Specifically, the multiple blades 22 are arranged with their upper and lower portions overlapping in sequence. Taking the view and number of blades 22 shown in FIG22A as an example, in the clockwise direction, a portion of the second blade 22 is located above the first blade 22, a portion of the third blade 22 is located below the second blade 22, a portion of the fourth blade 22 is located above the third blade 22, the fifth blade 22 is located below the fourth blade 22, the sixth blade 22 is located above the fifth blade 22, and the first blade 22 is located below the sixth blade 22. With this design, the aperture size of the aperture 221 can be changed by rotating the multiple blades 22.

[0266] It should be noted that the number of blades 22 in Figure 22A is only for illustration and does not limit the number of blades 22 in the variable aperture 10. As long as the blades 22 can be rotated to change the size of the aperture hole 221, it is acceptable.

[0267] For example, the blade 22 may have a rotating hole 222 and a sliding hole 223. The rotating hole 222 may be circular, and the sliding hole 223 may be arc-shaped.

[0268] Please refer to Figures 23A to 24B. Figure 23A is a schematic diagram of the multiple blades 22 shown in Figure 22A installed on the structure shown in Figure 21B; Figure 23B is a schematic diagram of the structure shown in Figure 23A from another perspective; Figure 24A is a schematic diagram of the structure shown in Figure 23A after being cut along line JJ in some embodiments; Figure 24B is a schematic diagram of the structure shown in Figure 23A after being cut along line KK in some embodiments.

[0269] In some embodiments, the rotation hole 222 of the blade 22 can be fitted onto the first protrusion 118 of the base 11, and the sliding hole 223 can be fitted onto the second protrusion 215 of the carrier 21. The carrier 21 is used to drive the first protrusion 118 of the blade 22 to rotate via the second protrusion 215, so as to change the aperture size of the aperture hole 221.

[0270] In this embodiment, since the base 11 is fixed and the carrier 21 rotates relative to the base 11, the position of the first protrusion 118 is fixed, and the second protrusion 215 moves with the carrier 21 relative to the base 11. As a result, when the carrier 21 rotates relative to the base 11, the second protrusion 215 moves within the sliding hole 223. By acting on the inner wall of the sliding hole 223, it drives the blade 22 to rotate around the first protrusion 118, thereby changing the overlapping surface between two adjacent blades 22, and thus changing the aperture size of the aperture 221 formed by the multiple blades 22.

[0271] For example, when the second protrusion 213 abuts against the first sidewall 1121, the aperture 221 has the maximum aperture, and when the second protrusion 213 abuts against the second sidewall 1122, the aperture 221 has the minimum aperture.

[0272] In this embodiment, the first sidewall 1121 and the second sidewall 1122 can form a limiting position for the second protrusion 213, which can prevent damage to the blade 22 when the carrier 21 drives the blade 22 to rotate. In other words, when the second protrusion 213 abuts against the first sidewall 1121 or the second sidewall 1122, there is a gap between the second protrusion 215 and the two ends of the sliding hole 223. This design can prevent the second protrusion 215 from driving the blade 22 to rotate excessively, so as to avoid damage to the blade 22 due to excessive force.

[0273] Taking the structure shown in Figure 23B as an example, when the carrier 21 rotates counterclockwise relative to the base 11, the aperture of the aperture 221 gradually increases in size. When the second protrusion 213 abuts against the first sidewall 1121, the carrier 21 can no longer move counterclockwise. At this time, the blade 22 is in the first position, and the aperture 221 has its maximum aperture. Similarly, when the carrier 21 rotates clockwise relative to the base 11, the aperture of the aperture 221 gradually decreases in size. When the second protrusion 213 abuts against the second sidewall 1122, the carrier 21 can no longer move clockwise. At this time, the blade 22 is in the second position, and the aperture 221 has its minimum aperture.

[0274] For example, the first through hole 1111 of the base plate 111, the second through hole 1131 of the second peripheral side plate 113, the third through hole 142 of the gasket 14 and the aperture hole 221 are connected in sequence. With this design, light can pass through the aperture hole 221, the third through hole 142, the second through hole 1131 and the first through hole 1111 in sequence and enter the lens assembly that is connected to the variable aperture 10.

[0275] Please refer to Figures 25 to 27. Figure 25 is a structural schematic diagram of the decorative cover 4 in some embodiments of the variable aperture 10 shown in Figure 3; Figure 26 is an exploded structural schematic diagram of the decorative cover 4 shown in Figure 25 in some embodiments; Figure 27 is a structural schematic diagram of the decorative cover 4 shown in Figure 25 after being cut open along line LL in one embodiment.

[0276] In some embodiments, the decorative cover 4 may have a fourth through hole 41, which penetrates the decorative cover 4 along the thickness direction of the decorative cover 4, that is, the fourth through hole 41 penetrates the decorative cover 4 along the Z-axis direction.

[0277] For example, the decorative cover 4 may include a first cover body 42 and a second cover body 43, which may be stacked.

[0278] The first cover 42 may include a first cover body 42a and a third frame 42b. The third frame 42b is embedded in the first cover body 42a to improve the overall structural strength of the first cover 42.

[0279] The first cover body 42a and the third frame 42b can both be provided with weight reduction holes. The design of the weight reduction holes can not only reduce the material and weight, but also form an I-shaped structure to improve the structural strength.

[0280] For example, the third frame 42b can be a hard material such as metal or ceramic, while the first cover body 42a can be a material that is easy to process and mold, such as plastic. In this way, the first cover body 42a is easy to process and manufacture, and the third frame 42b provides strength support, making the first cover body 42 easy to manufacture and structurally strong.

[0281] The first cover body 42a may also be provided with a plurality of second openings 421a, which may be spaced apart circumferentially along the first cover body 42a. The second openings 421a may penetrate the first cover body 42a along the Z-axis and penetrate the side of the first cover body 42a.

[0282] Both the second cover 43 and the first cover 42 have protruding structures on their sides.

[0283] Referring to Figures 3 and 25, in some embodiments, the decorative cover 4 can be installed on the base 11, wherein the edge of the decorative cover 4 overlaps the first peripheral side plate 112, and the second opening 421a can be connected with the mounting post 117 to improve the stability of the decorative cover 4 installed on the base 11.

[0284] For example, the fourth through hole 41 can connect to the aperture hole 221, and the diameter of the fourth through hole 41 is greater than or equal to the maximum diameter of the aperture hole 221, so that external light can enter the aperture hole 221 through the fourth through hole 41, and the decorative cover 4 will not block the aperture hole 221. The decorative cover 4 not only serves as an external decoration, but also as a dustproof protection.

[0285] The side protrusions of the second cover 43 and the first cover 42 can cover the second protrusion 213 of the carrier 21, thus serving as a decorative cover.

[0286] Please refer to Figures 28 to 29B. Figure 28 is a structural schematic diagram of the variable aperture 10 shown in Figure 3 after being cut along line MM in some embodiments; Figure 29A is a structural schematic diagram of the variable aperture 10 shown in Figure 3 after being cut along line N1-N1 in some embodiments; Figure 29B is a structural schematic diagram of the variable aperture 10 shown in Figure 3 after being cut along line N2-N2 in some embodiments.

[0287] In this embodiment, the first magnetic chuck 121 and the driving magnet 23 are arranged opposite each other along the thickness direction of the variable aperture 10, so that the first magnetic chuck 121 and the driving magnet 23 can generate a magnetic attraction force in the Z-axis direction, so that the carrier 21 can be stably connected to the base 11 in the Z-axis direction. The second magnetic chuck 122 and the driving magnet 23 are arranged opposite each other along the radial direction of the variable aperture 10, so that the second magnetic chuck 122 and the driving magnet 23 can generate a lateral magnetic attraction force, so that the carrier 21 can be stably connected to the base 11 in the radial direction of the variable aperture 10. Therefore, during the change of the aperture aperture 221 and after the aperture aperture 221 is adjusted, both the first magnetic chuck 121 and the second magnetic chuck 122 can strengthen the connection between the carrier 21 and the base 11 through the magnetic attraction force with the driving magnet 23, improving the stability of the connection between the carrier 21 and the base 11, preventing the carrier 21 from shaking, and improving the stability of the aperture aperture 221. Furthermore, due to the arrangement of the first magnetic clasp 121 and the second magnetic clasp 122, the current of the drive coil 132 can be cut off after the aperture 221 is adjusted. The stability of the carrier 21 and the blade 22 is ensured by the first magnetic clasp 121 and the second magnetic clasp 122, so as to ensure the aperture 221 is stable, realize power-off locking, reduce the steady-state current of the variable aperture 10, and reduce power consumption. This is beneficial to improving the resolution of the camera module 100 when the variable aperture 10 is applied to the camera module 100.

[0288] In this embodiment, since the width of both ends of the second magnetic accumulator 122 is greater than the width of the middle region, the restoring torque on the carrier 21 generated by the second magnetic accumulator 122 through the magnetic attraction force of the driving magnet 23 during the rotation of the carrier 21 relative to the base 11 can be reduced, thereby reducing the rotational resistance of the carrier 21 relative to the base 11 and helping to save power consumption.

[0289] In some embodiments, the drive coil 132 is energized during the process of adjusting the position of the blade 22 from the first target position to the second target position; and the drive coil 132 is de-energized when the position of the blade 22 is adjusted to the second target position.

[0290] In this embodiment, since the stationary time of the blade 22 in the variable aperture 10 is much longer than the movement time of the blade 22, that is, the aperture of the aperture hole 221 changes less, by adjusting the position of the blade 22 and then de-energizing the drive coil 132, the stable current of the variable aperture 10 can be significantly reduced, thereby reducing power consumption. This is beneficial for improving the resolution of the camera module 100 when the variable aperture 10 is applied to the camera module 100.

[0291] In some embodiments, the variable aperture 10 can satisfy: (F z -mg)μ1L1+F c μ2L2>1.2×(F r1 +F r2 ) (F c -mg) / (μ1F z )>1.2

[0292] Wherein, F2 is the magnetic attraction force of the first magnetic attractor 121 on the driving magnet 23; m is the total weight of the carrier 21, the driving magnet 23, and the blade 22; μ1 is the coefficient of friction between the body 211 and the first bearing surface 1142; L1 is the distance between the contact surface of the body 211 and the first bearing surface 1142 and the center of the carrier 21; F c μ2 is the magnetic attraction force of the second magnetic attractor 122 on the driving magnet 23; μ2 is the coefficient of friction between the first protrusion 212 and the rolling element 3; L2 is the distance between the contact point between the first protrusion 212 and the rolling element 3 and the center of the carrier 21; F r1 The perturbation torque of the internal components of electronic device 1000 on the variable aperture 10; F r2 This refers to the disturbance torque exerted by the external forces on the variable aperture 10.

[0293] It should be noted that F r1 Specifically, it refers to the perturbation torque inside the electronic device 1000 on the variable aperture 10 outside the variable aperture 10. Its specific value can be obtained through testing based on the specific structure of the electronic device 1000. r2 Specifically, it refers to the external disturbance torque of the electronic device 1000 on the variable aperture 10, which can be obtained by testing according to the usage scenario of the electronic device 1000. For example, the test value can be obtained by selecting extreme scenarios of the electronic device 1000, or by testing according to the most common usage scenario of the electronic device 1000.

[0294] In this embodiment, through the above formula design, during the process of changing the aperture 221, the first magnetic suction member 121 and the second magnetic suction member 122 can generate a stable magnetic attraction force with the driving magnet 23, thereby providing the carrier 21 with torque in the thickness direction and lateral direction of the variable aperture 10, so as to overcome the external disturbance of the variable aperture 10, and enable the carrier 21 to rotate stably relative to the base 11, thereby realizing the stable switching of the aperture 221. Furthermore, through the above formula design, after the aperture 221 is adjusted, the first magnetic suction member 121 can generate a strong magnetic attraction force in the Z-axis direction with the driving magnet 23, and the second magnetic suction member 122 can generate a strong lateral magnetic attraction force with the driving magnet 23. This allows the carrier 21 to be stably attached to the support platform 114 of the base 11 in the Z-axis direction, and the carrier 21 to be stably abutted against the rolling member 3 in the radial direction of the variable aperture 10. At this time, it is not necessary to control the stability of the carrier 21 through the driving coil 132. Therefore, by de-energizing the driving coil 132, the steady-state current of the variable aperture 10 can be reduced, thereby reducing power consumption. This is beneficial for improving the resolution of the camera module 100 when the variable aperture 10 is applied to the camera module 100.

[0295] The control method provided in this application will be described below.

[0296] Please refer to Figures 28 and 30. Figure 30 is a flowchart illustrating a control method provided in an embodiment of this application.

[0297] In some embodiments, a cyclic detection method can be used to detect whether the variable aperture 10 has received a first command. The first command instructs the blades 22 to be adjusted to a target position to achieve aperture adjustment of the aperture 221.

[0298] Specifically, the control method may include the following steps:

[0299] Step S1: Check if the first instruction has been issued.

[0300] If so, proceed to step S201; otherwise, proceed to step S211.

[0301] In step S201, in response to the first instruction, the variable aperture controls the blades to adjust to the target position through the closed-loop controller and executes the first switching strategy.

[0302] The variable aperture can be the variable aperture 10 in Figure 28, and the blade can be the blade 22 in Figure 28.

[0303] The first switching strategy is to reduce the steady-state current of the variable aperture 10. This strategy may include: the variable aperture 10 controlling the drive coil 132 to de-energize; the variable aperture 10 switching the closed-loop controller to an open-loop controller; or the variable aperture 10 switching the first closed-loop controller to a second closed-loop controller. The first closed-loop controller is a proportional-integral-derivative (PID) controller, and the second closed-loop controller is a proportional-derivative (PD) controller. The specific execution of the first switching strategy will be described in detail later.

[0304] Various controllers can be integrated into the driver chip 133.

[0305] Step S202: Reset the timer.

[0306] Step S211: The timer increments automatically.

[0307] Step S212: Determine whether the timing duration has reached the preset duration.

[0308] The preset duration is a pre-set duration that can be designed according to different application scenarios or needs. The specific duration value is not limited here.

[0309] If yes, proceed to step S213; otherwise, continue with step S1.

[0310] Step S213: Determine whether the current position is the first position or the second position.

[0311] When the blade 22 is in the first position, the aperture 221 has the largest aperture, and when the blade 22 is in the second position, the aperture 221 has the smallest aperture.

[0312] If yes, proceed to step S2141; otherwise, proceed to step S2142.

[0313] In step S2141, the variable aperture continues to control the blades via the first method.

[0314] In step S2142, the variable aperture continues to control the blades via a second method.

[0315] Depending on the current position of the blade 22, different methods are used to control the blade 22, so as to adopt appropriate control methods for different scenarios and reduce the steady-state current of the variable aperture 10.

[0316] Please refer to Figures 28, 30, and 31. Figure 31 is a schematic flowchart of some embodiments of the control method shown in Figure 30. It should be noted that the control method shown in Figure 31 does not include cyclic control.

[0317] In some embodiments, a control method S100 is provided, which determines the target position before executing the first switching strategy, and then determines the specific execution of the first switching strategy. The first switching strategy may include: the variable aperture 10 switching the closed-loop controller to an open-loop controller, or the variable aperture 10 controlling the drive coil 132 to be de-energized.

[0318] Specifically, the control method S100 may include the following specific steps:

[0319] Step S110: Determine whether the target position is the first position or the second position.

[0320] If yes, then the first switching strategy is step S1111, and step S1111 is executed; if no, then the first switching strategy is step S1121, and step S1121 is executed.

[0321] Step S1111: The variable aperture switches the closed-loop controller to an open-loop controller.

[0322] In the first position, the blades 22 of the variable aperture 10 need to be fully open, requiring a large driving force to overcome mechanical resistance and friction. Similarly, in the second position, the blades 22 of the variable aperture 10 need to be tightly closed, which also requires a large driving force to ensure close contact and positional stability between the blades 22. The drive chip 133 of the variable aperture 10 adjusts the current output according to the actual opening and closing degree of the aperture 221 to ensure that the aperture motor can accurately position itself to the target position. However, in both the first and second positions, due to the specific nature of the mechanical motion, the drive chip 133 needs to output a larger current to overcome mechanical resistance and friction, resulting in a surge in the steady-state current of the variable aperture 10.

[0323] The steady-state current of the variable aperture maintaining closed-loop control can be referenced in Figure 32, which is a schematic diagram of the steady-state current when the variable aperture uses a closed-loop controller to maintain the blade position in some embodiments. The horizontal axis represents the motor stroke; different motor strokes correspond to different blade positions. A motor stroke of 0 corresponds to the first blade position, and a motor stroke of 4000 corresponds to the second blade position. It can be understood that in other embodiments, a motor stroke of 0 corresponds to the second blade position, and a motor stroke of 4000 corresponds to the first blade position.

[0324] As can be seen from Figure 32, when the variable aperture always controls the blades through the closed-loop controller, the steady-state current in the variable aperture increases significantly in the first and second positions compared to other positions.

[0325] In this embodiment, the variable aperture 10 switches the closed-loop controller to an open-loop controller. This design allows the drive chip 133 to switch the control of the blade 22 from closed-loop control to open-loop control. As a result, the drive chip 133 no longer adjusts the control of the blade 22 in real time based on the position information feedback, thereby saving the power consumed by the drive chip 133 in processing feedback information and reducing power consumption.

[0326] In this embodiment, the arrangement of the first magnetic attractor 121 and the second magnetic attractor 122 ensures the stability of the carrier 21 in the thickness direction of the variable aperture 10 through the magnetic attraction between the first magnetic attractor 121 and the driving magnet 23, and ensures the stability of the carrier 21 in the radial direction of the variable aperture 10 through the magnetic attraction between the second magnetic attractor 122 and the driving magnet 23. Therefore, after the variable aperture 10 switches from a closed-loop controller to an open-loop controller, the current of the drive coil 132 can be reduced. Thus, the drive coil 132 can achieve the stability of the blade 22 in the first or second position with a small current, thereby reducing power consumption.

[0327] In this embodiment, referring to Figure 23A, since the second protrusion 213 of the carrier 21 abuts against the first sidewall 1121 when the blade 22 is in the first position, the variable aperture 10 only needs to apply a force toward the first sidewall 1121 to the carrier 21 to ensure the stability of the blade 22 in the first position. Therefore, after the variable aperture 10 switches the closed-loop controller to the open-loop controller, it only needs to control the application of a unidirectional current in the drive coil 132 to achieve the stability of the blade 22 in the first position, which is beneficial for reducing power consumption. Similarly, when the blade 22 is in the second position, the second protrusion 213 of the carrier 21 abuts against the second sidewall 1122. Therefore, the variable aperture 10 only needs to apply a force toward the second sidewall 1122 to the carrier 21 to ensure the stability of the blade 22 in the second position. Therefore, after the variable aperture 10 switches the closed-loop controller to the open-loop controller, it only needs to control the application of a unidirectional current in the drive coil 132 to achieve the stability of the blade 22 in the second position, which is beneficial for reducing power consumption.

[0328] It should be noted that after the variable aperture 10 switches to an open-loop controller, it can switch from high-current control to low-current control while ensuring the stability of the blade 22. The specific value of the low current can be calculated according to different application scenarios and requirements of the variable aperture 10, and the calculated value is used as the set value to be applied when the variable aperture 10 switches to an open-loop controller.

[0329] Step S1112: Determine whether the current position of the blade is within the preset error range of the target position.

[0330] If yes, proceed to step S1113; otherwise, proceed to step S1114.

[0331] In step S1113, the variable aperture continues to control the blades via the open-loop controller.

[0332] It should be noted that "the variable aperture continues to control the blades through the first method" in step S2141 of Figure 30 can refer to "the variable aperture continues to control the blades through the open-loop controller" in step S1113 of this embodiment.

[0333] In step S1114, the variable aperture switches the open-loop controller to a closed-loop controller, and controls the blades to adjust to the target position through the closed-loop controller.

[0334] Continue with step S1111.

[0335] In this embodiment, by executing steps S1112 and S1114, the situation where the variable aperture 10 is not adjusted to the target position due to external interference can be addressed during the adjustment process of the variable aperture 10, thereby making the adjustment of the aperture hole 221 more accurate and more resistant to risks.

[0336] The current position of the blade 22 can be determined by measuring the Hall value through the Hall element, thereby determining whether the current position of the blade 22 is within the preset error range of the target position.

[0337] The Hall element can be integrated into the driver chip 133.

[0338] Step S1121: The variable aperture 10 controls the de-energization of the drive coil.

[0339] The driving coil can be the driving coil 132 in Figure 28.

[0340] In this embodiment, since the first magnetic chuck 121 and the driving magnet 23 are arranged opposite to each other along the thickness direction of the variable aperture 10, the first magnetic chuck 121 can generate a magnetic attraction force in the Z-axis direction with the driving magnet 23, so that the carrier 21 can be stably connected to the base 11 in the Z-axis direction. Since the second magnetic chuck 122 and the driving magnet 23 are arranged opposite to each other along the radial direction of the variable aperture 10, the second magnetic chuck 122 can generate a lateral magnetic attraction force with the driving magnet 23, so that the carrier 21 can be stably connected to the base 11 in the radial direction of the variable aperture 10. Therefore, after the blade 22 is adjusted to the target position, the current of the drive coil 132 is cut off. The stability of the carrier 21 and the blade 22 can be ensured by the first magnetic chuck 121 and the second magnetic chuck 122, so as to ensure the aperture of the aperture 221 is stable, realize power-off locking, reduce the steady-state current of the variable aperture 10, and reduce power consumption. This is beneficial to improving the resolution of the camera module 100 when the variable aperture 10 is applied to the camera module 100.

[0341] Step S1122: Determine whether the current position of blade 22 is within the preset error range of the target position.

[0342] If yes, proceed to step S1123; otherwise, proceed to step S1124.

[0343] Step S1123: The variable aperture continues to control the drive coil to be de-energized.

[0344] It should be noted that "the variable aperture continues to control the blades via the second method" in step S2142 of Figure 30 can refer to "the variable aperture continues to control the drive coil to be de-energized" in step S1123 of this embodiment.

[0345] In step S1124, the variable aperture control drive coil is energized and the blades are driven to adjust to the target position.

[0346] Continue with step S1121.

[0347] In this embodiment, by executing steps S1122 and S1124, the situation where the variable aperture 10 is not adjusted to the target position due to external interference can be addressed during the adjustment process of the variable aperture 10, thereby making the adjustment of the aperture hole 221 more accurate and more resistant to risks.

[0348] The current position of the blade 22 can be determined by measuring the Hall value through the Hall element, thereby determining whether the current position of the blade 22 is within the preset error range of the target position.

[0349] In some other embodiments, when the target position is the first position or the second position, the variable aperture 10 can also execute steps S1121 to S1124. In this case, step S2141 "the variable aperture continues to control the blades in the first way" in FIG30 can refer to "the variable aperture continues to control the drive coil to be de-energized" in step S1123 in this embodiment.

[0350] It should be noted that in some scenarios, it is not necessary to distinguish whether the target position is the first position or the second position. The first switching strategy can be step S1121, which uses the first magnetic chuck 121 and the second magnetic chuck 122 to stabilize the position of the carrier 21 and the blade 22, thereby achieving power-off locking of the drive coil 132, reducing steady-state current, and reducing power consumption. In other scenarios, when the first magnetic chuck 121 and the second magnetic chuck 122 alone cannot completely stabilize the position of the carrier 21 and the blade 22 in the first or second position, the first switching strategy can be step S1111, which allows the drive coil 132 to maintain the position stability of the carrier 21 and the blade 22 by driving with a small current.

[0351] In some other embodiments, when the blade 22 includes only the first position and the second position, that is, when the variable aperture 10 has only two positions, the first switching strategy can achieve the stability of the positions of the carrier 21 and the blade 22 and reduce the steady-state current of the variable aperture 10 without relying on the first magnetic attractor 121 and the second magnetic attractor 122, simply by switching the closed-loop controller to the open-loop controller.

[0352] Please refer to Figures 28, 30, and 33. Figure 33 is a schematic flowchart of a specific embodiment of the control method shown in Figure 30. It should be noted that the control method shown in Figure 33 does not show cyclic control.

[0353] In some embodiments, a control method S200 is provided, which determines the target position before executing the first switching strategy, and then determines the specific execution of the first switching strategy. The first switching strategy may include: the variable aperture 10 switching the closed-loop controller to an open-loop controller, or the closed-loop controller being a PID controller and the variable aperture 10 switching the PID controller to a PD controller.

[0354] Specifically, the control method S200 may include the following specific steps:

[0355] Step S210: Determine whether the target position is the first position or the second position.

[0356] If yes, then the first switching strategy is step S2111, and step S2111 is executed; if no, then the first switching strategy is step S2121, and step S2121 is executed.

[0357] Step S2111: The variable aperture switches the closed-loop controller to an open-loop controller.

[0358] In the first position, the blades 22 of the variable aperture 10 need to be fully open, requiring a large driving force to overcome mechanical resistance and friction. Similarly, in the second position, the blades 22 of the variable aperture 10 need to be tightly closed, which also requires a large driving force to ensure close contact and positional stability between the blades 22. The drive chip 133 of the variable aperture 10 adjusts the current output according to the actual opening and closing degree of the aperture 221 to ensure that the aperture motor can accurately position itself to the target position. However, in both the first and second positions, due to the specific nature of the mechanical motion, the drive chip 133 needs to output a larger current to overcome mechanical resistance and friction, resulting in a surge in the steady-state current of the variable aperture 10.

[0359] In this embodiment, the variable aperture 10 switches the closed-loop controller to an open-loop controller. This design allows the drive chip 133 to switch the control of the blade 22 from closed-loop control to open-loop control. As a result, the drive chip 133 no longer adjusts the control of the blade 22 in real time based on the position information feedback, thereby saving the power consumed by the drive chip 133 in processing feedback information and reducing power consumption.

[0360] In this embodiment, the arrangement of the first magnetic attractor 121 and the second magnetic attractor 122 ensures the stability of the carrier 21 in the thickness direction of the variable aperture 10 through the magnetic attraction between the first magnetic attractor 121 and the driving magnet 23, and ensures the stability of the carrier 21 in the radial direction of the variable aperture 10 through the magnetic attraction between the second magnetic attractor 122 and the driving magnet 23. Therefore, after the variable aperture 10 switches from a closed-loop controller to an open-loop controller, the current of the drive coil 132 can be reduced. Thus, the drive coil 132 can achieve the stability of the blade 22 in the first or second position with a small current, thereby reducing power consumption.

[0361] In this embodiment, referring to Figure 23A, since the second protrusion 213 of the carrier 21 abuts against the first sidewall 1121 when the blade 22 is in the first position, the variable aperture 10 only needs to apply a force toward the first sidewall 1121 to the carrier 21 to ensure the stability of the blade 22 in the first position. Therefore, after the variable aperture 10 switches the closed-loop controller to the open-loop controller, it only needs to control the application of a unidirectional current in the drive coil 132 to achieve the stability of the blade 22 in the first position, which is beneficial for reducing power consumption. Similarly, when the blade 22 is in the second position, the second protrusion 213 of the carrier 21 abuts against the second sidewall 1122. Therefore, the variable aperture 10 only needs to apply a force toward the second sidewall 1122 to the carrier 21 to ensure the stability of the blade 22 in the second position. Therefore, after the variable aperture 10 switches the closed-loop controller to the open-loop controller, it only needs to control the application of a unidirectional current in the drive coil 132 to achieve the stability of the blade 22 in the second position, which is beneficial for reducing power consumption.

[0362] It should be noted that after the variable aperture 10 switches to an open-loop controller, it can switch from high-current control to low-current control while ensuring the stability of the blade 22. The specific value of the low current can be calculated according to different application scenarios and requirements of the variable aperture 10, and the calculated value is used as the set value to be applied when the variable aperture 10 switches to an open-loop controller.

[0363] Step S2112: Determine whether the current position of the blade is within the preset error range of the target position.

[0364] If yes, proceed to step S2113; otherwise, proceed to step S2114.

[0365] In step S2113, the variable aperture continues to control the blades via the open-loop controller.

[0366] It should be noted that "the variable aperture continues to control the blades through the first method" in step S2141 of Figure 30 can refer to "the variable aperture continues to control the blades through the open-loop controller" in step S2113 of this embodiment.

[0367] In step S2114, the variable aperture switches the open-loop controller to a closed-loop controller, and controls the blades to adjust to the target position through the closed-loop controller.

[0368] Continue with step S2111.

[0369] In this embodiment, by executing steps S2112 and S2114, the situation where the variable aperture 10 is not adjusted to the target position due to external interference can be addressed during the adjustment process of the variable aperture 10, thereby making the adjustment of the aperture hole 221 more accurate and more resistant to risks.

[0370] The current position of the blade 22 can be determined by measuring the Hall value through the Hall element, thereby determining whether the current position of the blade 22 is within the preset error range of the target position.

[0371] Step S2121: The variable aperture switches the PID controller to a PD controller.

[0372] In this embodiment, during the process of controlling the carrier 21 to move relative to the base 11 to drive the blade 22 to the target position, the PID controller achieves precise control of the blade 22's position by adjusting three parameters: the proportional coefficient Kp, the integral coefficient Ki, and the derivative coefficient Kd. Because the adjustment of the integral coefficient Ki in the PID controller exhibits saturation characteristics and hysteresis, unnecessary frictional current accumulates during the rotation of the carrier 21 relative to the base 11 due to the presence of friction. By turning off the adjustment of the integral coefficient after the blade 22 reaches the target position (i.e., turning off the integral output) and switching the PID controller to a PD controller, the frictional disturbance current is eliminated, thereby reducing the steady-state current of the variable aperture 10 and ultimately achieving power reduction.

[0373] The change in steady-state current in the variable aperture 10 can be compared by referring to Figures 34 and 35 after the PID controller is switched to the PD controller.

[0374] Figure 34 is a schematic diagram of the steady-state current when the variable aperture 10 always uses a PID controller to control the blades in some embodiments; Figure 35 is a schematic diagram of the steady-state current when the variable aperture 10 switches from a PID controller to a PD controller at the target position in some embodiments. In the figures, the horizontal axis represents the number of motors, i.e., the number of variable apertures 10, and the vertical axis represents the steady-state current of the variable aperture 10. Different curves correspond to different positions of the blades. These curves can include Z1, Z2, Z3, and Z4 depending on the blade position.

[0375] Based on Figures 34 and 35, the average steady-state current of the multiple variable apertures 10 at each position on the blade was calculated, and Table 1 was obtained. Table 1 shows the average steady-state current of the variable apertures 10 at different positions on the blade.

[0376] Table 1

[0377] As can be seen from Table 1, at multiple different positions on the blade, i.e. at multiple different target positions, the variable aperture 10 switches the PID controller to the PD controller, which can significantly reduce the steady-state current in the variable aperture, thereby reducing power consumption.

[0378] It should be noted that when the positional stability of the carrier 21 and the blade 22 can be achieved by setting the first magnetic chuck 121 and the second magnetic chuck 122, the first switching strategy can adopt step S1121 "de-energizing the variable aperture control drive coil" in Figure 31. When the positional stability of the carrier 21 and the blade 22 cannot be completely achieved by setting the first magnetic chuck 121 and the second magnetic chuck 122, for example, under strong external interference, the first switching strategy can adopt step S2121 "switching the variable aperture PID controller to a PD controller" in Figure 32 of this embodiment, in order to cooperate with the first magnetic chuck 121 and the second magnetic chuck 122 to achieve positional stability of the carrier 21 and the blade 22.

[0379] It should be noted that the method S200 shown in Figure 33 of this embodiment can achieve positional stability of the carrier 21 and the blade 22 without relying on the setting of the first magnetic suction member 121 and the second magnetic suction member 122. At this time, the first switching strategy no longer includes step S1121 "power off the variable aperture control drive coil" in Figure 31.

[0380] Step S2122: Determine whether the current position of the blade is within the preset error range of the target position.

[0381] If yes, proceed to step S2123; otherwise, proceed to step S2124.

[0382] In step S2123, the variable aperture continues to control the blades via the PD controller.

[0383] It should be noted that "the variable aperture continues to control the blades via the second method" in step S2142 of Figure 30 can refer to "the variable aperture continues to control the blades via the PD controller" in step S2123 of this embodiment.

[0384] In step S2124, the variable aperture switches the PD controller to a PID controller, and controls the blades to adjust to the target position through the PID controller.

[0385] Continue with step S2121.

[0386] In this embodiment, by executing steps S2122 and S2124, the situation where the variable aperture 10 is not adjusted to the target position due to external interference can be addressed during the adjustment process of the variable aperture 10, thereby making the adjustment of the aperture hole 221 more accurate and more resistant to risks.

[0387] The current position of the blade 22 can be determined by measuring the Hall value through the Hall element, thereby determining whether the current position of the blade 22 is within the preset error range of the target position.

[0388] Please refer to Figures 28, 30, and 36. Figure 36 is a schematic flowchart of a specific embodiment of the control method shown in Figure 30. It should be noted that the control method shown in Figure 36 does not include cyclic control.

[0389] In some embodiments, a control method S300 is provided, wherein the first switching strategy may include: the closed-loop controller is a PID controller, and the variable aperture 10 switches the PID controller to a PD controller.

[0390] Specifically, the control method S300 may include the following specific steps:

[0391] Step S310: The variable aperture detects the first command.

[0392] In step S320, in response to the first command, the variable aperture controls the blades to adjust to the target position via the closed-loop controller.

[0393] The closed-loop controller can be a PID controller.

[0394] In step S330, the variable aperture switches the PID controller to a PD controller.

[0395] In this embodiment, it is not necessary to determine whether the current position is the first position. The PID controller can be switched to the PD controller to eliminate the current of the frictional disturbance, thereby reducing the steady-state current of the variable aperture 10 and thus reducing power consumption.

[0396] Step S340: Determine whether the current position of the blade is within the preset error range of the target position.

[0397] If yes, proceed to step S350; otherwise, proceed to step S360.

[0398] In step S350, the variable aperture continues to control the blades via the PD controller.

[0399] It should be noted that "the variable aperture continues to control the blade through the first method" in step S2141 of Figure 30 and "the variable aperture continues to control the blade through the second method" in step S2142 can refer to "the variable aperture continues to control the blade through the PD controller" in step S350 of this embodiment.

[0400] In step S360, the variable aperture switches the PD controller to a PID controller, and controls the blades to adjust to the target position through the PID controller.

[0401] Continue with step S330.

[0402] In this embodiment, by executing steps S340 and S360, the situation where the variable aperture 10 is not adjusted to the target position due to external interference can be addressed during the adjustment process of the variable aperture 10, thereby making the adjustment of the aperture hole 221 more accurate and more resistant to risks.

[0403] The current position of the blade 22 can be determined by measuring the Hall value through the Hall element, thereby determining whether the current position of the blade 22 is within the preset error range of the target position.

[0404] It should be noted that one or more of the modules or units described in this application can be implemented by software, hardware, or a combination of both. When any of the above modules or units are implemented by software, the software exists in the form of computer program instructions and is stored in memory. The processor can be used to execute the program instructions and implement the above method flow. The processor can include, but is not limited to, at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, etc., and various computing devices that run software. Each computing device may include one or more cores for executing software instructions to perform calculations or processing. The processor can be built into a SoC (System-on-a-Chip) or an application-specific integrated circuit (ASIC), or it can be a separate semiconductor chip. In addition to the cores for executing software instructions to perform calculations or processing, the processor may further include necessary hardware accelerators, such as field-programmable gate arrays (FPGAs), PLDs (programmable logic devices), or logic circuits that implement dedicated logic operations.

[0405] When the modules or units described in this application are implemented in hardware, the hardware may be any one or any combination of a CPU, microprocessor, DSP, MCU, artificial intelligence processor, ASIC, SoC, FPGA, PLD, application-specific digital circuit, hardware accelerator or non-integrated discrete device, which may run the necessary software or perform the above method flow independently of the software.

[0406] When the modules or units described in this application are implemented using software, they can be implemented in whole or in part as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0407] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0408] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0409] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of 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 system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0410] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0411] 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. If the functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes: USB flash drive, mobile hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, and other media capable of storing program code. It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs. It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0412] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology 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 variable aperture (10), characterized in that, It includes a base (11), a carrier (21), multiple blades (22), a drive coil (132), a drive magnet (23), a first magnetic attractor (121), and a second magnetic attractor (122); The carrier (21) is rotatably connected to the base (11), the blade (22) connects the base (11) and the carrier (21), and the plurality of blades (22) surround the aperture (221); The base (11) includes a base plate (111) and a first peripheral side plate (112). The first peripheral side plate (112) is connected to the periphery of the base plate (111). The base (11) has a first mounting hole (116). The first mounting hole (116) passes through the first peripheral side plate (112) radially along the variable aperture (10). The driving coil (132) and the driving magnet (23) are at least partially located in the first mounting hole (116). The driving coil (132) is mounted on the base plate (111). The driving magnet (23) is mounted on the carrier (21). The driving coil (132) and the driving magnet (23) are arranged opposite to each other along the thickness direction of the variable aperture (10). The driving coil (132) is used to drive the driving magnet (23) to drive the carrier (21) to rotate relative to the base (11) to change the aperture size (221). The first magnetic attractor (121) is mounted on the base (11) and located on the side of the drive coil (132) facing away from the drive magnet (23). The first magnetic attractor (121) and the drive magnet (23) are arranged opposite to each other along the thickness direction of the variable aperture (10). The second magnetic attractor (122) is mounted on the base (11), and the second magnetic attractor (122) and the driving magnet (23) are arranged opposite each other in the radial direction of the variable aperture (10).

2. The variable aperture (10) as described in claim 1, characterized in that, The base (11) also includes a plurality of support platforms (114), the support platforms (114) and the first peripheral side plate (112) protruding on the same side of the base plate (111), the support platforms (114) are connected to the inner side of the first peripheral side plate (112), the plurality of support platforms (114) are arranged at intervals along the circumference of the variable aperture (10), the support platform (114) is provided with a first mounting groove (1141) on the side away from the first peripheral side plate (112), and the support platform (114) has a first bearing surface (1142) facing away from the base plate (111); The variable aperture (10) also includes a plurality of rolling elements (3), one of the rolling elements (3) being installed in one of the first mounting slots (1141); The carrier (21) includes a body (211) and a plurality of first protrusions (212). The body (211) has a ring structure and has an inner ring surface (2111) and an outer ring surface (2112) arranged opposite to each other. The first protrusions (212) are connected to the side of the body (211) facing the base plate (111), and the first protrusions (212) are closer to the inner ring surface (2111) than the outer ring surface (2112). The surface of the body (211) facing the base plate (111) abuts against the first bearing surface (1142), and the surface of the first protrusions (212) facing the outer ring surface (2112) abuts against the rolling element (3).

3. The variable aperture (10) as described in claim 2, characterized in that, The variable aperture (10) is applied to an electronic device (1000), and the variable aperture (10) satisfies: (F z -mg)μ1L1+F c μ2L2>1.2×(F r1 +F r2 ) (F c -mg) / (μ1F z )>1.2 Among them, F z ρ is the magnetic attraction force of the first magnetic attractor (121) on the driving magnet (23); m is the total weight of the carrier (21), the driving magnet (23), and the blade (22); μ1 is the coefficient of friction between the body (211) and the first bearing surface (1142); L1 is the distance between the contact surface between the body (211) and the first bearing surface (1142) and the center of the carrier (21); F c F is the magnetic attraction force of the second magnetic attractor (122) on the driving magnet (23); μ2 is the coefficient of friction between the first protrusion (212) and the rolling element (3); L2 is the distance between the contact point of the first protrusion (212) and the rolling element (3) and the center of the carrier (21); r1 F represents the perturbation torque of the internal components of the electronic device (1000) on the variable aperture (10); r2 The disturbance torque exerted by the external environment on the variable aperture (10).

4. The variable aperture (10) as described in any one of claims 1 to 3, characterized in that, The number of the first mounting holes (116) is multiple, and the multiple first mounting holes (116) are arranged at intervals along the circumference of the variable aperture (10); The number of the driving magnet (23), the driving coil (132) and the first magnetic attractor (121) are all multiple. One driving magnet (23) and one driving coil (132) are set with one first mounting hole (116), and one first magnetic attractor (121) is set with one driving magnet (23).

5. The variable aperture (10) as described in claim 4, characterized in that, The plurality of first mounting holes (116) are evenly spaced along the circumference of the variable aperture (10).

6. The variable aperture (10) as described in any one of claims 1 to 5, characterized in that, The first magnetic attractor (121) is elongated and is positioned at least partially opposite to the driving magnet (23) during the rotational stroke of the carrier (21) relative to the base (11).

7. The variable aperture (10) as described in any one of claims 1 to 6, characterized in that, The variable aperture (10) also includes a plurality of rolling elements (3), which are located between the carrier (21) and the base (11); The number of driving magnets (23) is multiple, and the multiple driving magnets (23) are arranged at intervals along the circumference of the variable aperture (10). The second magnetic attractor (122) is arranged corresponding to one of the multiple driving magnets (23). The plurality of rolling elements (3) include a first ball (31) and a second ball (32), the first ball (31) being closer to the second magnetic element (122) than the second ball (32), the carrier (21) abutting the second ball (32) radially along the variable aperture (10), and the second ball (32) abutting the base (11) radially along the variable aperture (10).

8. The variable aperture (10) as described in any one of claims 1 to 7, characterized in that, The base (11) also includes a second peripheral side plate (113), which protrudes from the same side of the base plate (111) as the first peripheral side plate (112). The base plate (111) has a first through hole (1111), and the second peripheral side plate (113) is connected to the periphery of the first through hole (1111). The second peripheral side plate (113) surrounds and forms a second through hole (1131). The first through hole (1111), the second through hole (1131) and the aperture hole (221) are connected in sequence. The first peripheral side plate (112), the second peripheral side plate (113) and the base plate (111) surround and form a first mounting space (115). The first mounting hole (116) connects to the first mounting space (115). The carrier (21) includes a body (211) and a second protrusion (213). The body (211) is rotatably connected to the base (11). The second protrusion (213) is connected to the outer periphery of the body (211) and is located in the first mounting hole (116). A part of the driving magnet (23) is installed on the body (211), and another part of the driving magnet (23) is installed on the second protrusion (213). The second magnetic attractor (122) is located in the first mounting space (115) and is mounted on the surface of the second peripheral side plate (113) facing the first peripheral side plate (112).

9. The variable aperture (10) as described in claim 8, characterized in that, The first mounting hole (116) has a first sidewall (1121) and a second sidewall (1122) on the first peripheral side plate (112). The first sidewall (1121) and the second sidewall (1122) are arranged opposite to each other along the circumference of the variable aperture (10). When the second protrusion (213) abuts against the first sidewall (1121), the aperture hole (221) has the maximum aperture. When the second protrusion (213) abuts against the second sidewall (1122), the aperture hole (221) has the minimum aperture.

10. The variable aperture (10) as described in any one of claims 1 to 9, characterized in that, The second magnetic attractor (122) is elongated and is positioned at least partially opposite to the driving magnet (23) during the rotational stroke of the carrier (21) relative to the base (11).

11. The variable aperture (10) as described in claim 10, characterized in that, Along the circumference of the variable aperture (10), the widths at both ends of the second magnetic member (122) are greater than the width of the middle portion of the second magnetic member (122).

12. The variable aperture (10) as claimed in any one of claims 1 to 11, characterized in that, The first mounting hole (116) includes a first sub-hole (1161) and a second sub-hole (1162). The first sub-hole (1161) and the second sub-hole (1162) are connected. The first sub-hole (1161) passes through the first peripheral side plate (112) along the radial direction of the variable aperture (10). The second sub-hole (1162) passes through the base plate (111) along the thickness direction of the variable aperture (10). The driving magnet (23) is located in the first sub-hole (1161), and the driving coil (132) is located in the second sub-hole (1162). The variable aperture (10) also includes a circuit board (131), which is mounted on the side of the base plate (111) facing away from the carrier (21). The circuit board (131) covers the second sub-hole (1162). The drive coil (132) is mounted on the circuit board (131) and electrically connected to the circuit board (131). The first magnetic attractor (121) is mounted on the side of the circuit board (131) facing away from the drive magnet (23).

13. The variable aperture (10) as described in claim 12, characterized in that, The base plate (111) has a second mounting groove (1112), the opening of the second mounting groove (1112) faces away from the driving magnet (23), the second mounting groove (1112) communicates with the second sub-hole (1162), and the circuit board (131) is mounted in the second mounting groove (1112).

14. The variable aperture (10) as described in any one of claims 1 to 13, characterized in that, The base (11) has a plurality of first protrusions (118), which are arranged at intervals along the circumference of the variable aperture (10). The carrier (21) has a plurality of second protrusions (215), which are arranged at intervals along the circumference of the variable aperture (10), and the second protrusions (215) are farther away from the center of the variable aperture (10) than the first protrusions (118). The blade (22) has a rotating hole (222) and a sliding hole (223). The rotating hole (222) is circular and is fitted onto the first protrusion (118). The sliding hole (223) is arc-shaped and is fitted onto the second protrusion (215). The carrier (21) is used to drive the blade (22) to rotate along the first protrusion (118) via the second protrusion (215) to change the aperture size of the aperture hole (221).

15. The variable aperture (10) as claimed in any one of claims 1 to 14, characterized in that, The variable aperture (10) also includes a decorative cover (4) having a fourth through hole (41). The decorative cover (4) is mounted on the base (11) and located on the side of the blade (22) away from the carrier (21). The fourth through hole (41) communicates with the aperture hole (221). The diameter of the fourth through hole (41) is greater than or equal to the maximum diameter of the aperture hole (221).

16. The variable aperture (10) as claimed in any one of claims 1 to 15, characterized in that, During the process of adjusting the position of the blade (22) from the first target position to the second target position, the drive coil (132) is energized; when the position of the blade (22) is adjusted to the second target position, the drive coil (132) is de-energized.

17. A camera module (100), characterized in that, It includes a lens assembly (20) and a variable aperture (10) as claimed in any one of claims 1 to 16, wherein the variable aperture (10) is fixedly mounted on the light-incident side of the lens assembly (20).

18. An electronic device (1000), characterized in that, It includes a housing (300) and a camera module (100) as described in claim 17, the camera module (100) being mounted on the housing (300).

19. A control method applied to a variable aperture (10), characterized in that, The variable aperture (10) includes a base (11), a carrier (21), multiple blades (22), a drive coil (132), a drive magnet (23), and a magnetic attraction component (12); The carrier (21) is rotatably connected to the base (11), the blade (22) connects the base (11) and the carrier (21), and the plurality of blades (22) surround the aperture (221); The driving coil (132) is mounted on the base plate (111), and the driving magnet (23) is mounted on the carrier (21). The driving coil (132) and the driving magnet (23) are arranged opposite to each other along the thickness direction of the variable aperture (10). The driving coil (132) is used to drive the driving magnet (23) to drive the carrier (21) to rotate relative to the base (11) so as to change the aperture size of the aperture hole (221). The magnetic attraction component (12) is mounted on the base (11), and the magnetic attraction component (12) is arranged opposite to the driving magnet (23); The method includes: The variable aperture (10) detects a first command, which instructs the blade (22) to be adjusted to the target position; In response to the first instruction, the variable aperture (10) controls the blade (22) to adjust to the target position through the closed-loop controller and executes the first switching strategy; The first switching strategy includes: The closed-loop controller is a proportional-integral-derivative PID controller, and the variable aperture (10) switches the PID controller to a proportional-derivative PD controller; or, The variable aperture (10) switches the closed-loop controller to an open-loop controller.

20. The method as described in claim 19, characterized in that, Before the variable aperture (10) executes the first switching strategy, the method further includes: The variable aperture (10) determines whether the target position corresponds to a first position or a second position. When the target position is in the first position, the aperture hole (221) has the maximum aperture, and when the target position is in the second position, the aperture hole (221) has the minimum aperture. If not, the first switching strategy includes: the closed-loop controller is the PID controller, and the variable aperture (10) switches the PID controller to the PD controller; If so, the first switching strategy includes: The closed-loop controller is the PID controller, and the variable aperture (10) switches the PID controller to the PD controller; or, The variable aperture (10) switches the closed-loop controller to the open-loop controller.

21. The method as described in claim 20, characterized in that, After the variable aperture (10) switches the closed-loop controller to the open-loop controller, the method further includes: Determine whether the current position of the blade (22) is within the preset error range of the target position; If so, the variable aperture (10) continues to control the blade (22) through the open-loop controller; If not, the variable aperture (10) switches the open-loop controller to the closed-loop controller and controls the blade (22) to adjust to the target position through the closed-loop controller; The variable aperture (10) switches the closed-loop controller to an open-loop controller.

22. The method as described in claim 20 or 21, characterized in that, After executing the first switching strategy, the method further includes: If the first instruction is not detected, when the timing duration of the variable aperture (10) reaches the preset duration, it is determined whether the current position of the blade (22) is the first position or the second position; If not, the variable aperture (10) continues to control the blade (22) via the PD controller; If so, the variable aperture (10) continues to control the blade (22) through the open-loop controller.

23. An electronic device (1000), characterized in that, include: One or more processors; One or more memory units; And one or more computer programs, wherein the one or more computer programs are stored in the one or more memories, the one or more computer programs including instructions that, when executed by the one or more processors, cause the electronic device (1000) to perform the method as described in any one of claims 19 to 22.

24. A computer-readable storage medium, characterized in that, The storage medium stores a program or instructions that, when executed, implement the method as described in any one of claims 19 to 22.

25. A computer program product, characterized in that, The computer program product stores a program or instructions that, when executed, implement the method as described in any one of claims 19 to 22.

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