WO2023246556A1 - Aperture control method, aperture controller, camera module and electronic device - Google Patents

Abstract

An aperture control method (400), an aperture controller, a camera module (103, 200), and an electronic device (100). The aperture control method (400) is applied to an aperture assembly (210). The aperture assembly (210) comprises a controller, a motor, and blades (320). The controller is used for controlling the motor to drive the blades (320) to move so as to form light incident holes having various diameters. The aperture control method (400) comprises: the controller acquires a target diameter position of an aperture (S410); when the light incident hole at the target diameter position has a maximum diameter value or has a minimum diameter value, the controller controls the motor to drive, at a constant current, the blades (320) to move until the blades (320) are fixed to the target diameter position by means of limiting parts (S420, S430); and when the light incident hole at the target diameter position is greater than the minimum diameter value and less than the maximum diameter value, according to a deviation between an actual diameter position and the target diameter position of the aperture, the controller controls the motor to drive, at a dynamic current, the blades (320) to move to the target diameter position (S440). The aperture position control policy can obtain images having good shooting quality in different shooting scenarios.

Description

Aperture control method, aperture controller, camera module and electronic device

This application requests the priority of the Chinese patent application submitted to the China Patent Office on June 24, 2022, with the application number 202210726641.X and the application name "Aperture control method, aperture controller, camera module and electronic equipment", which The entire contents are incorporated herein by reference.

Technical field

Embodiments of the present application relate to the technical field of electronic equipment, and more specifically, to an aperture control method, an aperture controller, a camera module, and an electronic device.

Background technique

With the continuous development of electronic device technology, electronic devices such as mobile phones, tablets, and wearable devices have increasingly higher requirements for shooting functions, in order to provide a camera-like shooting experience and adapt to the shooting needs of different scenes.

For this reason, camera modules with variable apertures emerged. Specifically, by setting a variable aperture on the front end of the lens of the camera module, the aperture size for light to pass through can be adjusted, thereby adjusting the amount of light entering.

Controlling the amount of light entering has an important impact on imaging quality. It is very important to provide an aperture gear control strategy to obtain better-quality images in different shooting scenarios.

Contents of the invention

Embodiments of the present application provide an aperture control method, an aperture controller, a camera module and an electronic device, which can obtain images with better shooting quality in different shooting scenarios.

In a first aspect, an aperture control method is provided, which is applied to an aperture assembly. The aperture assembly includes a controller, a motor and a blade. The controller is used to control the motor to drive the movement of the blade to form an aperture with multiple apertures. light entrance hole, the method includes:

The controller obtains the target aperture position of the aperture;

When the target aperture position of the aperture is the first target position, the controller controls the motor to drive the blade to move with a first constant current until the blade is fixed to the first target through the first limiting part. Position, wherein the light entrance hole of the first target position has the largest aperture value among the plurality of apertures;

When the target aperture position of the aperture is the second target position, the controller controls the motor to drive the blade to move with a second constant current until the blade is fixed to the second target through the second limiting part. position, wherein the light entrance hole of the second target position has the smallest aperture value among the plurality of apertures;

When the target aperture position of the aperture is the third target position, the controller obtains the actual aperture position of the aperture;

According to the deviation between the target aperture position of the aperture and the actual aperture position of the aperture, the controller controls the motor to drive the blade to move to the third target position with a third current, wherein the third current The apertures of the light entrance holes at the three target positions are smaller than the maximum aperture value and larger than the minimum aperture value.

In the embodiment of the present application, when the target aperture position of the aperture is the maximum aperture position or the minimum aperture position, a combination of open-loop control and mechanical limit is used to achieve switching of the aperture position. When the target aperture position of the aperture is between the maximum aperture position and When between the minimum aperture positions, closed-loop control is used to switch the aperture position. This solution can achieve the accuracy, speed and stability of aperture position control, so that the amount of light can be better controlled in different shooting scenarios, thereby obtaining images with good shooting quality.

In conjunction with the first aspect, in a possible implementation, the magnitude of the third current changes dynamically with the deviation between the target aperture position of the aperture and the actual aperture position of the aperture.

In the closed-loop control, the controller adjusts the size of the third current in real time according to the deviation between the target aperture position and the actual aperture position to stably switch the aperture position.

In conjunction with the first aspect, in a possible implementation, when the target aperture position of the aperture is the first target position or the second target position, the controller performs open-loop control; when the When the target aperture position of the aperture is the third target position, the controller performs closed-loop control.

The open-closed loop control combined with mechanical limit can be used to switch a variety of aperture gears, which can solve the problems of inaccurate Hall element feedback and insensitive partial aperture positions caused by many aperture gears, and achieves multiple aperture gears. The purpose of arbitrary switching. In addition, the open-loop control combined with the mechanical limit strategy improves the accuracy of open-loop control.

In conjunction with the first aspect, in a possible implementation, the motor includes a magnet and a coil, one of the magnet and the coil is a stator, and the other is a mover, and the mover is used to drive The blade moves to change the aperture of the light entrance hole;

When the target aperture position of the aperture is the first target position, the first constant current is used to input into the coil to drive the mover to rotate around the axis of the light inlet. the first magnetic force; or

When the target aperture position of the aperture is the second target position, the second constant current is used to input into the coil to drive the mover to rotate around the axis of the light inlet. the second magnetic force;

Wherein, the direction of the first magnetic force and the second magnetic force are opposite.

The direction in which the first constant current is input into the coil to drive the mover to rotate is opposite to the direction in which the second constant current is input into the coil to drive the mover to rotate. The aperture can be switched to the maximum aperture position or the minimum aperture within a certain drive current range. Location.

Combined with the first aspect, in a possible implementation, the method further includes:

When the target aperture position of the aperture is the first target position, after the blade is fixed at the first target position, the controller controls the motor to drive the blade with a fourth constant current to keep it at the first target position. The first target position, wherein the fourth constant current is less than the first constant current and greater than 0; or,

When the target aperture position of the aperture is the second target position, after the blade is fixed at the second target position, the controller controls the motor to drive the blade with a fifth constant current to keep it at the second target position. The second target position, wherein the fifth constant current is less than the second constant current and greater than 0.

When the position of the aperture reaches the target aperture position, the controller can reduce the current of the drive motor to keep the aperture at the target aperture position, which can reduce power consumption.

In conjunction with the first aspect, in a possible implementation, the method further includes: when the aperture is in a preset scene, the controller controls the motor to drive the blade movement to form an aperture with a maximum aperture value. A light entrance hole, wherein the blade is fixed by a locking mechanism, and the stress experienced by the aperture in the preset scene is greater than or equal to a preset value.

When the stress on the aperture is greater than or equal to the preset value, no matter what aperture position the aperture is in, the aperture is switched to the position with the largest aperture. In this way, the aperture blades are in a contracted state, and the aperture blades can also be fixed by the locking mechanism, which can protect the blades and reduce the possibility of damage to the blades when they are subjected to large stress.

With reference to the first aspect, in a possible implementation, the controller controls the motor to drive the blade to move Moving to form the light entrance hole with the maximum aperture value includes: the controller controls the motor to drive the blade movement with a constant current to form the light entrance hole with the maximum aperture value; or, the controller controls the motor according to The deviation between the actual aperture position of the aperture and the maximum aperture position of the aperture controls the motor to drive the blade movement with dynamic current to form the light entrance hole with the maximum aperture value.

When the aperture is in a preset scene, the controller controls the motor to drive the movement of the blades to form a light entrance hole with a maximum aperture value, which can be open-loop control or closed-loop control.

In conjunction with the first aspect, in a possible implementation, the method further includes: before the motor is powered off, the controller controls the motor to drive the blade movement to form a light entrance with a maximum aperture value. hole.

Before the motor is powered off, no matter what aperture position the aperture is in, switch the aperture to the position with the largest aperture. In this way, the aperture blades are in a contracted state, which can protect the blades and reduce the possibility of damage to the blades.

In conjunction with the first aspect, in a possible implementation, the method further includes: after the motor is powered off, when the aperture is in a preset scene, the controller controls the motor to be powered on, and The motor is controlled to drive the movement of the blade to form a light entrance hole with a maximum aperture value, wherein the blade is fixed by a locking mechanism, and the stress experienced by the aperture in the preset scene is greater than or equal to the preset value.

After the motor is powered off, if the aperture is subject to greater stress, the controller can control the motor to power on again and switch the aperture to the position with the largest aperture. In this way, the aperture blades are in a contracted state, which can reduce the possibility of damage to the blades.

In conjunction with the first aspect, in a possible implementation, the aperture being in a preset scene is determined based on a gyroscope signal and/or an acceleration signal.

Combined with the first aspect, in a possible implementation, the preset scene includes at least one of the following scenes: a beating scene, a swinging scene, and a falling scene.

In conjunction with the first aspect, in a possible implementation, the aperture value of the first target position is less than or equal to 1.4, and the aperture value of the second target position is greater than or equal to 4.0.

In a second aspect, an aperture control method is provided, which is applied to an aperture assembly. The aperture assembly includes a controller, a motor and a blade. The controller is used to control the motor to drive the movement of the blade to form an aperture with multiple apertures. Light entrance hole, the method includes: when the aperture is in a preset scene, the controller controls the motor to drive the blade movement to form a light entrance hole with a maximum aperture value, wherein the blade is fixed by a locking mechanism , the stress experienced by the aperture in the preset scene is greater than or equal to the preset value.

In the embodiment of the present application, when the aperture is under great stress, no matter what aperture position the aperture is in, the controller switches the aperture to the maximum aperture position, and uses a locking mechanism to fix the blades. In this way, the aperture blades are in a contracted state, which can reduce the possibility of damage to the blades.

Combined with the second aspect, in a possible implementation, when the aperture is in a preset scene and the motor is in a power-on state, the controller controls the motor to drive the blade to move to form an aperture with a maximum aperture. The light inlet hole with the maximum aperture value includes: the controller controls the motor to drive the blade with a first constant current to move from the current position until the blade forms the light inlet hole with the maximum aperture value.

Combined with the second aspect, in a possible implementation, when the aperture is in a preset scene and the motor is in a power-off state, the controller controls the motor to drive the blade to move to form a hole with a maximum aperture. The value of the light inlet includes: the controller controls the motor to be powered on; the controller controls the motor to drive the blade with a first constant current to start moving from the current position until the blade forms the shape with the maximum The aperture value of the light hole.

Combined with the second aspect, in a possible implementation, the aperture being in a preset scene is determined based on a gyroscope signal and/or an acceleration signal.

Combined with the second aspect, in a possible implementation, the preset scene includes at least one of the following scenes: a beating scene, a swinging scene, and a falling scene.

In a third aspect, an aperture controller is provided, the aperture controller being configured to perform the above-mentioned first aspect and the method in any possible implementation of the first aspect, or to perform the above-mentioned second aspect and the second aspect. method in any possible implementation.

In a fourth aspect, an aperture controller is provided, which is included in an electronic device. The device has the function of realizing the behavior involved in the above-mentioned first aspect and any possible implementation of the first aspect, or It has the function of realizing the behavior involved in the above-mentioned second aspect and any possible implementation of the second aspect. This function can be implemented by hardware, or can be implemented by hardware executing corresponding software. Hardware or software includes one or more modules or units or circuits corresponding to the above functions. For example, signal processing circuits, control circuits, drive circuits, etc.

In a fifth aspect, an aperture assembly is provided, including a controller, a motor and a blade. The controller is used to control the motor to drive the movement of the blade to form a light entrance hole with multiple apertures, wherein the controller is used to Perform the method in the above-mentioned first aspect and any possible implementation of the first aspect, or perform the method in the above-mentioned second aspect and any possible implementation of the second aspect.

In a sixth aspect, a camera module is provided, including a lens and the aperture component in the fourth aspect. The aperture component is disposed at the front end of the lens to form a light inlet with multiple apertures.

In a seventh aspect, an electronic device is provided, including the camera module in the fifth aspect and a housing for accommodating the camera module.

An eighth aspect provides an electronic device, including: one or more processors; one or more memories; the one or more memories store one or more computer programs, and the one or more computer programs including instructions that, when executed by the one or more processors, cause the electronic device to perform the above-mentioned first aspect and the method in any possible implementation of the first aspect, or to perform the above-mentioned second aspect and the method in any possible implementation of the second aspect.

In a ninth aspect, a computer-readable storage medium is provided, including computer instructions. When the computer instructions are run on an electronic device, the electronic device causes the electronic device to execute the above-mentioned first aspect and any possible implementation of the first aspect. The method in the manner, or perform the above second aspect and the method in any possible implementation manner of the second aspect.

In a tenth aspect, a computer program product containing instructions is provided. When the computer program product is run on a computer, it causes the computer to execute the method in the above-mentioned first aspect and any possible implementation of the first aspect, or to execute the above-mentioned method. The method in the second aspect and any possible implementation manner of the second aspect.

In an eleventh aspect, a chip is provided. The chip includes a processor and a data interface. The processor reads instructions stored on the memory through the data interface to execute the above-mentioned first aspect and the first aspect. The method in any possible implementation manner, or the method in any possible implementation manner of performing the above second aspect and the second aspect.

Optionally, as an implementation manner, the chip may further include a memory, in which instructions are stored, and the processor is configured to execute the instructions stored in the memory. When the instructions are executed, the The processor is configured to perform the method in the above-mentioned first aspect and any possible implementation of the first aspect, or to perform the method in the above-mentioned second aspect and any possible implementation of the second aspect.

The above-mentioned chip may specifically be a field programmable gate array or an application specific integrated circuit.

For the beneficial effects of the devices described in the third to eleventh aspects, reference can be made to the beneficial effects of the methods described in the first and second aspects, which will not be described again here.

Description of the drawings

FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Figure 2 is a schematic structural diagram of a camera module provided by an embodiment of the present application.

Figures 3-6 are schematic structural diagrams of an variable aperture provided by embodiments of the present application.

FIG. 7 is a schematic diagram of a variable aperture gear provided by an embodiment of the present application.

Figure 8 is a schematic diagram of the aperture position detected by the Hall element during the entire stroke of the motor.

FIG. 9 is a schematic flow chart of an aperture control method provided by an embodiment of the present application.

FIG. 10 is a schematic diagram of the variable aperture provided by the embodiment of the present application at the maximum aperture position.

Figure 11 is a schematic flow chart of an aperture control method provided by an embodiment of the present application.

Figure 12 is a schematic flow chart of open-loop control and closed-loop control provided by the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

In the embodiments of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined by "first," "second," etc. may explicitly or implicitly include one or more of such features. In addition, the "vertical" involved in this application is not vertical in the strict sense, but within the allowable error range. "Parallel" is not parallel in the strict sense, but within the allowable error range.

In the description of the embodiments of the present application, the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. indicate an orientation or positional relationship that is schematically placed relative to the components in the drawings. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, rather than indicating or implying that the device or component referred to must have a specific orientation, or Constructed and operated in a specific orientation, it may change accordingly depending on the orientation in which the components are placed in the drawings, and therefore should not be construed as a limitation of the present application.

It should be noted that in the embodiments of the present application, the same reference numerals are used to represent the same components or components. For the same components in the embodiments of the present application, only one of the parts or components may be marked in the figure as an example. Reference numerals, it should be understood that the same reference numerals apply to other identical parts or components.

To facilitate understanding, the technical terms involved in the embodiments of this application are first explained and described below.

Aperture is a device used to control the amount of light entering the photosensitive surface of the camera body through the lens. The size of the aperture controls the amount of light that enters, and also controls the size of the background blur (that is, it controls the depth of field of the picture). The larger the aperture, the more light enters and the brighter the picture. The smaller the aperture, the less light enters and the darker the picture. The larger the aperture, the shallower the depth of field and the more obvious the background blur (i.e. the background is blurred). The smaller the aperture, the deeper the depth of field and the clearer the background.

Aperture can be divided into fixed aperture and variable aperture. The size of the fixed aperture cannot be changed arbitrarily. The size of the variable aperture can be adjusted to adjust the amount of light entering. The adjustable aperture can bring more shooting advantages. For example, users can freely control the size of the aperture, thereby freely controlling the exposure time and background blur level. The size of the aperture described here refers to the size of the aperture (ie, clear aperture, clear diameter or through hole diameter) for light to pass through.

Aperture value, used to express the size of the aperture, usually represented by F. The aperture value is the ratio of the focal length of the lens to the diameter of the light, expressed as F (aperture value) = f (focal length of the lens) / D (the diameter of the light). The amount of light passing is expressed as the area of the hole corresponding to the light passing diameter, and is expressed by the formula S (light passing amount) = π (D/2) ² . The aperture value (i.e. F value) is inversely proportional to the aperture size. The larger the aperture, the smaller the aperture value. The generally common F value sequence (i.e. aperture gear) is as follows: F1.4, F2, F2.8, F4, F5.6, F8, F11, F16, F22, F32, F44, F64, among which for two adjacent F value, The amount of light transmitted by the former is twice that of the latter. In some embodiments, taking the aperture value as 1.4 as an example, the commonly used expression is F1.4 or F/1.4.

Aperture blades, or blades for short, are a set of overlapping sheet-like components within the aperture that adjust the clear aperture. Generally, the variable aperture includes a plurality of blades arranged in an annular shape to form a light entrance hole for light to pass through. By driving multiple blades to move, the size of the light entrance hole can be adjusted to achieve the purpose of changing the amount of light entering.

The optical axis is the direction in which the optical system transmits light. For symmetric transmission systems, the optical axis generally coincides with the rotation centerline of the optical system.

Auto focus (AF) can refer to the use of the lens imaging principle and the light reflection principle. The light reflected by the subject can be imaged on the image sensor after passing through the lens; according to the object distance of the subject, by moving one or more Lenses that form a clear image on the image sensor. Autofocus can simply be thought of as the movement of the lens along the optical axis relative to the image sensor.

Optical image stabilization (OIS) can mean that by adjusting the angle and position of the lens relative to the image sensor, the instrument jitter that occurs during the capture of optical signals can be reduced, thereby improving the imaging quality. One possible method is to detect the displacement or angle to be compensated through, for example, a gyroscope, and then drive the lens or image sensor through a motor to translate or rotate, so that the image blur caused by the shake of the imaging instrument during exposure can be compensated. Optical image stabilization can be simply regarded as the translation or rotation of the lens relative to the image sensor on a plane perpendicular to the optical axis.

FIG. 1 shows a schematic structural diagram of an electronic device provided by an embodiment of the present application.

The electronic device 100 involved in the embodiment of the present application is an electronic device with imaging functions (such as video or photography), such as a mobile phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, and a laptop computer (laptop computer). computer), video camera, video recorder, camera, smart watch, smart wristband, car computer, TV (or smart screen), etc.

The embodiment of the present application does not place any special restrictions on the specific form of the electronic device 100 . For convenience of explanation and understanding, the following description takes the electronic device 100 as a mobile phone as an example. For example, (a) and (b) in FIG. 1 schematically illustrate the front and back of the electronic device 100, respectively.

As shown in Figure 1, the electronic device 100 may include a housing 101, a display panel (display panel, DP) 102, and a camera compact module (CCM) 103.

The housing 101 forms a storage space for accommodating components of the electronic device 100 . The housing 101 can also play a role in protecting the electronic device 100 and supporting the entire machine. The display screen 102 and the camera module 103 are arranged in the accommodation space of the housing 101 and connected to the housing 101 . In some embodiments, the housing 101 may include a back cover disposed opposite the display screen 102 and a middle frame disposed inside the electronic device 100 , and the display screen 102 and the camera module 103 may be fixed on the middle frame. The material of the housing 101 may be metal, plastic, ceramic or glass.

The display screen 102 is used to display images, such as images captured by the camera module 103 . The display screen 102 can be a liquid crystal display (LCD) screen, an organic light emitting diode (OLED) display screen, etc., wherein the OLED display screen can be a flexible display screen or a hard display screen. The display screen 102 may be a regular screen, a special-shaped screen, a folding screen, etc. The display screen 102 may be disposed on the front and/or back of the electronic device 100 . Here, the front side of the electronic device 100 can be understood as the side facing the user when the user uses the electronic device 100 , and the back side of the electronic device 100 can be understood as the side facing away from the user when the user uses the electronic device 100 .

The camera module 103 is used to capture still images or videos. The camera module 103 can be disposed on the front and/or back of the electronic device 100 . When the camera module 103 is disposed on the front of the electronic device 100, it can be used to take pictures of people located on the electronic device 100. The scene on the front side of the sub-device 100, for example, used for selfies, may be called a front camera in some embodiments. When the camera module 103 is disposed on the back of the electronic device 100, it can be used to capture the scene on the back side of the electronic device 100. In some embodiments, it can be called a rear camera. When shooting, users can choose the corresponding camera module according to their shooting needs.

The camera module 103 can be a vertical module or a foldable module. The upright camera module can be understood as the light entering the camera module directly hits the image sensor, and the light path is not bent. Folding camera modules can be understood as the light entering the camera module needs to pass through reflectors, lenses, prisms and other components before hitting the image sensor, and the light path is folded. Folding camera modules can also be called periscope camera modules.

In some embodiments, the camera module 103 can be a telephoto camera module or a wide-angle camera module.

In some embodiments, the camera module 103 can be a fixed focus module or a zoom module, where the zoom module can include a manual zoom module and an automatic zoom module.

It can be understood that the installation position of the camera module 103 in Figure 1 is only schematic. When the camera module 103 is used as a front camera, it can be installed at any position on the front of the electronic device 100 except the display screen 102 , such as the left side of the earpiece, the upper middle of the electronic device 100 , or the lower part of the electronic device 100 . chin) or the four corners of the electronic device 100, etc. The camera module 103 can also be disposed in a hollowed-out area on the display screen 102 . When the camera module 103 is used as a rear camera, it can be installed at any position on the back of the electronic device 100, such as the upper left corner, the upper right corner or the upper middle position. In some other embodiments, the camera module 103 may not be disposed on the main body of the electronic device 100 , but may be disposed on an edge protruding relative to the main body of the electronic device 100 , or on a component that is movable or rotatable relative to the electronic device 100 , wherein the component can be retracted or rotated from the main body of the electronic device 100 so that the camera module 103 can be hidden inside the electronic device 100 or at least partially ejected from the electronic device 100 . When the camera module 103 can be rotated relative to the electronic device 100, the camera module 103 is equivalent to a front camera and a rear camera. That is, by rotating the same camera module 103, the scene on the front side of the electronic device 100 can be photographed. The scene located on the back side of the electronic device 100 can be photographed. In other embodiments, when the display screen 101 can be folded, the camera module 103 can be used as a front camera or a rear camera as the display screen 102 is folded.

The embodiment of the present application does not limit the number of camera modules 103, which can be one, two, four or even more. For example, one or more camera modules 103 can be installed on the front of the electronic device 100, and/or on One or more camera modules 103 are provided on the back of the electronic device 100 . When multiple camera modules 103 are provided, the multiple camera modules 103 may be completely the same or different. For example, the multiple camera modules 103 may have different lens optical parameters, different lens placement positions, and different lenses. The shapes are different. The embodiments of the present application do not place any restrictions on the relative positions of multiple camera modules when they are installed.

Optionally, in some embodiments, the electronic device 100 may also include a protective lens 104 for protecting the camera module 103 . The protective lens 104 is disposed on the housing 101 and covers the camera module 103 . When the protective lens 104 is used to protect the front camera, the protective lens 104 can only cover the front camera module or cover the entire front of the electronic device 100 . When the protective lens 104 covers the entire front of the electronic device 100, it can be used to protect the front camera module and the display screen 102 at the same time. The protective lens 104 is the cover glass (CG). When the protective lens 104 is used to protect the rear camera, the protective lens 104 can cover the entire back of the electronic device 100, or can be only disposed at a position corresponding to the rear camera module. The protective lens 104 may be made of glass, sapphire, ceramic, etc., and is not particularly limited in the embodiment of the present application. In some embodiments, the protective lens 104 is transparent, and light from outside the electronic device 100 can enter the camera module 103 through the protective lens 104 .

It should be understood that the structure illustrated in FIG. 1 does not constitute a specific limitation on the electronic device 100. The electronic device 100 may It includes more or fewer components than shown in the figure. For example, the electronic device 100 may also include one or more components such as batteries, flashlights, fingerprint recognition modules, earpieces, buttons, sensors, etc. The electronic device 100 may also be configured Parts arrangement differs from that shown in the illustration.

With the continuous development of electronic device technology, electronic devices such as mobile phones, tablets, and wearable devices have increasingly higher requirements for shooting functions, in order to provide a camera-like shooting experience and adapt to the shooting needs of different scenes. For example, in a dark environment, you need to take brighter and clearer photos; or, when taking photos in a beautiful place, you need to clearly capture people while taking into account the front and rear scenery; or, when taking portraits, Need to blur the background and highlight the subject, etc.

For this reason, camera modules with variable apertures emerged. Specifically, by setting a variable aperture on the front end of the lens of the camera module, the aperture size for light to pass through can be adjusted, thereby adjusting the amount of light entering and controlling the depth of field of the picture. For example, adjusting the size of the variable aperture can adapt to different lighting conditions and focusing distances, thereby helping users better adjust the amount of light and background blur to adapt to different scene needs.

For ease of understanding, FIG. 2 shows a schematic structural diagram of a camera module provided by an embodiment of the present application. The camera module 200 in FIG. 2 may be an exemplary structure of the camera module 103 in FIG. 1 .

For convenience of description, the optical axis direction of the camera module 200 is defined as the Z direction, the object direction side in the optical axis direction is the front side, and the direction side opposite to the object is the rear side. The first direction perpendicular to the optical axis is the X direction, and the second direction perpendicular to the optical axis and the first direction is the Y direction.

Here, the definitions of X, Y, Z directions and front and back are also applicable to each drawing to be described later. It should be noted that the above definitions of the X, Y, Z directions and the front and back are only for the convenience of describing the positional relationship, connection relationship and motion relationship between the components in the embodiment of the present application, and should not be understood as a definition of the present invention. Limitation of application examples.

As shown in FIG. 2 , the camera module 200 may include an aperture component 210 , a lens 220 , a driving component 230 and an image sensor component 240 .

The lens 220 is used to image the scene on the object side onto the imaging plane on the image side. The lens 220 may include a lens barrel and one or more lenses disposed in the lens barrel.

In some embodiments, lens 220 may be a fixed focus lens or a zoom lens.

In some embodiments, lens 220 may be a wide-angle lens, a standard lens, or a telephoto lens.

In some embodiments, lens 220 may be an upright lens or a periscope lens.

The driving component 230 is used to drive the lens 220 to move to achieve automatic focusing and/or optical image stabilization. For example, the driving assembly 230 may include a motor for moving the lens 220 for autofocus (hereinafter referred to as an AF motor) and a motor for moving the lens 220 for optical image stabilization (hereinafter referred to as an OIS motor). Specifically, the AF motor is used to move the lens 220 in the Z direction (ie, the direction of the optical axis) for automatic focusing, and the OIS motor is used to move the lens 220 in the X direction or the Y direction (ie, the direction perpendicular to the optical axis) for optical image stabilization. . The AF motor and the OIS motor can be two independent components, which independently drive the lens 220 to perform AF and OIS respectively. The AF motor and the OIS motor can also be the same component. This component can drive the lens 220 to perform AF and also drive the lens 220 to perform OIS.

In some embodiments, the AF motor and/or OIS motor can be a voice coil motor (VCM), a shape memory alloy (shape memory alloy, SMA) motor, a stepping motor (stepping motor), a piezoelectric motor ( piezoelectric motor) etc. It should be understood that the specific structures of the AF motor and the OIS motor can be designed and selected according to the selected driving mode, and will not be described in detail in the embodiment of this application.

The image sensor assembly 240 is disposed on the rear side of the lens 220 and is mainly used for imaging. Specifically, the light reflected by the object passes through the lens 220 and is projected onto the photosensitive surface of the image sensor assembly 240 . To get a clear image, The lens imaging principle can be utilized to drive the lens 220 to move to an appropriate position through the driving assembly 230 . Therefore, the light can be focused on the photosensitive surface of the image sensor assembly 240 to form a clear optical image. The image sensor assembly 240 can convert optical images into electrical signals to obtain image signals. In some embodiments, image sensor assembly 240 may include an image sensor as well as other peripheral devices and support structures.

The aperture component 210 is disposed on the front side of the lens 220 and is used to adjust the amount of incident light to improve image quality. Specifically, the aperture assembly 210 is used to control the amount of light that passes through the lens 220 and enters the photosensitive surface of the image sensor assembly 240 . In the embodiment of the present application, the aperture component 210 is a variable aperture structure. In some embodiments, the aperture assembly 210 includes a plurality of blades, which are arranged in an annular shape to form a light entrance hole for light to pass through. By driving the plurality of blades to move, the size of the light entrance hole can be adjusted to achieve changes. The purpose of the amount of light entering. The light from outside the camera module 200 enters the lens 220 through the light entrance hole of the aperture component 210, and the light passing through the lens 220 finally reaches the image sensor component for development and imaging. On the other hand, the aperture component 210 can also play a role in controlling the depth of field. Generally speaking, a larger aperture means a smaller depth of field; a smaller aperture means a larger depth of field.

By setting the aperture component 210, the camera module 200 can adapt to the shooting needs of different scenes. For example, by adjusting the size of the variable aperture, you can adapt to different lighting conditions and focusing distances to meet the needs of image brightness and provide different depths of field. This can help users better adjust the amount of light and background blur to improve imaging effects. . For example, under indoor lighting, multiple stripes will appear in the captured image. After adjusting the amount of light input through the aperture component 210, the captured image will be clearer. In addition, during macro photography, if the depth of field is shallow, the background cannot be blurred and it is difficult to highlight the subject. After adjusting the amount of light input through the aperture component 210, the depth of field can be increased and the background can be blurred to highlight the subject.

For ease of understanding, Figures 3 to 6 show schematic structural diagrams of an variable aperture provided by embodiments of the present application. Figure 3 is a schematic assembly diagram of the variable aperture, and Figures 4 to 6 are schematic exploded views of the variable aperture shown in Figure 3 . The variable aperture 300 shown in FIGS. 3 to 6 may be an exemplary structure of the aperture assembly 210 in FIG. 2 .

Referring to FIGS. 3 to 6 , the variable aperture 300 may include an upper cover 310 , a blade 320 , an aperture motor, and a flexible circuit board 350 . In the embodiment of the present application, the number of blades 320 is multiple, and the multiple blades 320 are arranged in an annular shape to form a light inlet for light to pass through. The center line of the light entrance hole is parallel to the direction of the optical axis. In some embodiments, the center line of the light entrance hole is collinear with the center line of the lens 220 , that is, the center line of the light entrance hole is collinear with the optical axis. The aperture motor can drive the plurality of blades 320 to rotate to adjust the aperture of the light entrance hole, thereby adjusting the amount of light input. The upper cover 310 is provided on the side of the blade 320 away from the lens for protecting the blade 320 . The upper cover 310 is provided with a through hole consistent with the maximum aperture diameter of the light entrance hole formed by the plurality of blades 320 . When the plurality of blades 320 are driven by the aperture motor to form a light entrance hole with a maximum aperture, the plurality of blades 320 can be hidden under the upper cover 310 . When the plurality of blades 320 are driven by the aperture motor to form a light entrance hole smaller than the maximum aperture, the plurality of blades 320 are exposed from the through hole of the upper cover 310 . The flexible circuit board 350 is used to transmit electrical signals for controlling the aperture motor.

FIG. 4 shows an exploded schematic view of the upper cover 310 separated from the variable aperture 300 . The aperture of the light inlet hole formed by the plurality of blades 320 is smaller than or equal to the aperture of the through hole provided on the upper cover 310 . It should be noted that the light inlet hole formed by the plurality of blades 320 is circular or polygonal (for example, a regular polygon). When the light entrance hole is circular, the aperture of the light entrance hole can be understood as the diameter of the circular light entrance hole. When the light entrance hole is polygonal, the aperture of the light entrance hole can be understood as the diameter of the inscribed circle of the polygonal light entrance hole. For example, the blades 320 may be in the shape of a sickle.

FIG. 5 shows an exploded view of the upper cover 310 and the blades 320 separated from the variable aperture 300 . Referring to FIG. 5 , in some embodiments, the aperture motor may include a fixed component 330 and a rotating component 340 . The fixed component 330 is sleeved on the rotating component 340 , wherein the rotating component 340 can be wound around the center of the light hole relative to the fixed component 330 . Line rotation. The blade 320 is rotationally connected to the fixed component 330 and slidingly connected to the rotating component 340. When the rotating component 340 is wound around the light hole When the centerline of the blade 320 is rotated, the blade 320 can be driven to rotate relative to the fixed component 330, and the size of the light inlet formed by the multiple blades 320 can be changed.

Referring to FIG. 6 , in some embodiments, the fixing assembly 330 may include a fixing carrier 331 , a coil 332 and a base 333 . The fixed carrier 331 and the base 333 are covered together to form a receiving space for accommodating the rotating assembly 340. The fixed carrier 331 and the base 333 are both hollow structures. For example, the fixed carrier 331 and the base 333 have a ring structure. In some embodiments, the coil 332 is fixedly connected to the fixed carrier 331 and/or the base 333 . In other embodiments, the coil 332 may be fixedly connected to the flexible circuit board 350 . In this embodiment of the present application, the coil 332 is electrically connected to the flexible circuit board 350 .

In some embodiments, the rotating assembly 340 may include a rotating carrier 341 and a magnet 342. The magnet 342 is fixedly connected to the rotating carrier 341 . The rotating carrier 341 has a hollow structure. For example, the rotating carrier 341 has an annular structure. In the assembled state, the fixed carrier 331 is sleeved on the rotating carrier 341, and the coil 332 and the magnet 342 are arranged oppositely in a direction perpendicular to the optical axis.

In some embodiments, there is air between coil 332 and magnet 342. For example, the coil 332 can be disposed on the surface of the fixed carrier 331 facing the rotating carrier 341 , and the magnet 342 can be disposed on the surface of the rotating carrier 341 facing the fixed carrier 331 . For another example, the side wall of the fixed carrier 331 may be provided with a groove that runs through the thickness of the side wall, and the coil 332 is fixed at a position corresponding to the groove. The side wall of the rotating carrier 341 may be provided with a groove that runs through the thickness of the side wall, and the magnet 342 is fixed at a position corresponding to the groove. At least part of the gap between the coil 332 and the magnet 342 does not include the side walls of the fixed carrier 331 or the side walls of the rotating carrier 341, which can reduce the size of the variable aperture in the direction perpendicular to the optical axis and also reduce the weight. For another example, the coil 332 can be disposed on the flexible circuit board 350, and the fixed carrier 331 removes the side wall at the position corresponding to the coil 332, so that the coil 332 and the magnet 342 are disposed oppositely.

In the embodiment of the present application, the number of coils 332 is one or more, and the number of magnets 342 is one or more. One coil 332 and one magnet 342 can serve as a set of coil-magnets. In the embodiment of the present application, one or more sets of coil-magnets can be provided. When multiple sets of coil-magnets are provided, the multiple sets of coil-magnets are evenly distributed in the circumferential direction perpendicular to the optical axis.

In some embodiments, the positions of the coil 332 and the magnet 342 can be reversed, that is, the rotating component 340 includes the coil 332 and the fixed component 330 includes the magnet 342. The purpose of the rotating component 340 driving the blade 320 to move can also be achieved. That is to say, in the embodiment of the present application, the aperture motor may include a stator and a mover. The stator may be one of a magnet or a coil, and the mover may be the other of a magnet or a coil.

In some embodiments, the fixing carrier 331 may include a first annular body 3311 and a positioning post 3312 protruding from the first annular body 3311 toward the blade 320 and facing the blade 320 . There are a plurality of positioning posts 3312 , the plurality of positioning posts 3312 are annularly distributed around the optical axis, and the plurality of positioning posts 3312 correspond to the plurality of blades 320 one-to-one. Each blade 320 is rotationally connected to the fixed carrier 331 through a positioning post 3312. That is to say, the blade 320 can rotate around the corresponding positioning post 3312.

In some embodiments, the rotating carrier 341 may include a second annular body 3411 and a guide post 3412 protruding from the second annular body 3411 toward the blade 320 and facing the blade 320 . There are multiple guide posts 3412 , the guide posts 3412 are annularly distributed around the optical axis, and the guide posts 3412 correspond to the plurality of blades one by one. Each blade 320 is slidingly connected to the rotating carrier 341 through a guide column 3412. In the embodiment of the present application, the blade 320 is driven to rotate around the positioning post 3312 by sliding between the blade 320 and the rotating carrier 341 .

Correspondingly, in some embodiments, the blade 320 may include a blade body 321 and a positioning hole 322 and a guide groove 323 opened from the blade body 321. The positioning hole 322 is sleeved on the positioning post 3312, and the guide slot 323 is sleeved on the guide column. 3412. Through the cooperation between the positioning post 3312 and the positioning hole 322, and the sliding of the guide post 3412 in the guide groove 323, The blade 320 can be driven to rotate around the corresponding positioning post 3312.

In the embodiment of the present application, through the interaction force between the coil 332 and the magnet 342 after being energized, the blade 320 can be driven to rotate around the corresponding positioning post 3312, thereby adjusting the aperture size of the light entrance hole and thereby adjusting the amount of light. More specifically, in the assembled state, the coil 332 and the magnet 342 are arranged oppositely in a direction perpendicular to the optical axis. When the coil 332 is energized, a Lorentz force will be generated between the coil 332 and the magnet 342. The Lorentz force The force is tangent to the radial direction of the rotating component 340, that is, the Lorentz force is a tangential force. Since the coil 332 is relatively fixed, the tangential force will drive the magnet 342 to rotate around the optical axis. The magnet 342 is fixed on the rotating carrier 341. Correspondingly, the tangential force serves as a driving force to drive the entire rotating assembly 340 to rotate around the optical axis. Since the guide post 3412 is located in the guide groove 323, when the rotating carrier 341 rotates, the guide post 3412 slides in the guide groove 232. One end of the blade 320 cooperates with the positioning post 3312 through the positioning hole 322, and this end is rotatable relative to the fixed component 330. When the guide post 3412 slides along the guide groove 323, the blade 320 can be driven to rotate around the positioning post 3312. The plurality of blades 320 rotate around their respective positioning posts 3312 at the same time, thereby realizing the opening and closing of the plurality of blades 320. Correspondingly, the aperture size of the light entrance hole formed by the plurality of blades 320 changes.

In some embodiments, the upper cover 310 may include an upper cover body 311 and a first through hole 312 and a first groove 313 opened on the upper cover body 311. The first through hole 312 and the first groove 313 both pass through the upper cover body 311. 311Thickness along the optical axis. The first through hole 312 is used for the positioning post 3312 to pass through, and the first slot 313 is used for the guide post 3412 to pass through. Since the guide post 3412 is movable, the shape of the first groove 313 is adapted to the movement trajectory of the guide post 3412. For example, the guide post 3412 rotates around the direction of the optical axis, and its movement trajectory is arc-shaped. Correspondingly, the first groove 313 may be an arc-shaped groove, but the application is not limited thereto. In some other embodiments, the first groove 313 can also have other shapes, as long as the first groove 131 does not hinder the movement of the guide post 3412. Here, the number of the first through holes 312 is multiple, and the multiple first through holes 312 correspond to the multiple positioning posts 3312 one by one. There are a plurality of first grooves 313 , and the plurality of first grooves 313 correspond to the plurality of guide posts 3412 one-to-one. The plurality of first through holes 312 are distributed annularly around the optical axis direction. The plurality of first grooves 313 are distributed annularly around the optical axis direction.

In the embodiment of the present application, the upper cover 310 is connected to the fixing assembly 330, so the upper cover 310 is fixed relative to the blade 320. The upper cover 310 can protect the blade 320 and prevent the blade 320 from coming out of the positioning post 3312 and/or the guide post 3412, thereby improving reliability.

In some embodiments, the flexible circuit board 350 is surrounding the outer surface of the fixing component 330 . The flexible circuit board 350 is used to transmit driving current to the coil 332 .

In some embodiments, the variable aperture 300 may further include a gasket 360 , which is disposed between the blade 320 and the rotating carrier 341 and may protect the blade 320 . The gasket 360 can avoid large-area contact between the blade 320 and the rotating carrier 341, and can reduce the friction of the blade 320 during movement, thereby extending the service life of the blade 320. On the other hand, the spacer 360 is annular and can be used as an aperture of a certain gear.

In some embodiments, the variable aperture 300 may further include a ball 370 disposed between the fixed carrier 331 and the rotating carrier 341 . Exemplarily, a first receiving groove 3313 is provided on the side of the first annular body 3311 of the fixed carrier 331 facing the rotating carrier 341, and the first receiving groove 3313 extends in a circumferential direction perpendicular to the optical axis. The second annular main body 3411 of the rotating carrier 341 is provided with a second receiving groove 3413 on the side facing the fixed carrier 331, and the second receiving groove 3413 extends along the circumferential direction perpendicular to the optical axis. Part of the ball 370 is received in the first receiving groove 3313, and part is received in the second receiving groove 3413. When the rotating carrier 341 rotates relative to the fixed carrier 331, the balls 370 roll in the space formed by the first receiving groove 3313 and the second receiving groove 3413, which can reduce the friction force during the rotation of the rotating carrier 341 and is beneficial to lifting the rotating carrier. The smoothness of 341 spins.

In some embodiments, the extension length of the first receiving groove 3313 and/or the second receiving groove 3413 is greater than or equal to the rotation stroke of the rotating carrier 341 .

In some embodiments, the first receiving groove 3313 extends in the optical axis direction to an end of the fixed carrier 331 away from the blade 320 . This makes it easier to install the ball 370.

In some embodiments, the first receiving groove 3313 runs through the wall thickness of the first annular body 3311 of the fixed carrier.

In some embodiments, the first receiving groove 3313 and the second receiving groove 3413 are filled with lubricating oil to reduce friction between the ball and the fixed carrier 331 and the rotating carrier 341 during motion.

In the embodiment of the present application, the number of balls 370 is one or more. When the variable aperture 300 includes multiple balls 370 , the number of the corresponding first receiving grooves 3313 and the second receiving grooves 3413 is multiple and corresponds to the number of the balls 370 . Of course, a set of first receiving grooves 3313 and second receiving grooves 3413 can accommodate multiple balls 370, which is not limited in the embodiment of the present application.

In some embodiments, the variable aperture 300 may further include a magnetically permeable sheet 380 . The magnetically conductive sheet 380 is disposed at an end of the fixing component 330 away from the blade 320 . For example, the magnetically conductive sheet 380 is disposed at the bottom of the base 333 . The magnetic conductive sheet 380 can generate an interaction force with the magnet 342, and this force can attract the rotating component 340, ensuring that in any state, the ball 370 can be pressed against the first receiving groove 3313 and the second receiving groove 3413, so that the rotating component 340 rotates smoothly, and can reduce or avoid the movement of the rotating assembly 340 along the optical axis during rotation, which affects the accuracy of aperture gear control.

In some embodiments, the variable aperture 300 may also include a drive chip 390, which is used to control the current supplied to the coil 322, that is, to control the drive current of the aperture motor, thereby controlling the gear of the aperture. The size of the driving current is different, and the speed at which the aperture motor drives the blade 320 is different. Generally, the greater the driving current, the faster the blade 320 moves; the smaller the driving current, the slower the blade 320 moves. In the embodiment of the present application, the driver chip 390 can be fixed on the flexible circuit board 350 and electrically connected to the flexible circuit board 350 .

In some embodiments, the driving chip 390 may be surrounded by the coil 332. During the rotation of the rotating assembly 340, the driving chip 390 may sense changes in the magnetic field of the magnet 342, thereby determining the position of the aperture. In some embodiments, the driving chip 390 includes a Hall element, so the driving chip 390 can detect the position of the aperture through the Hall element. The position of the aperture involved here can be understood as the position of the aperture of the light entrance hole, and can also be understood as the opening and closing size of the blade 320 .

As an example and not a limitation, FIG. 7 shows a schematic structural diagram of the variable aperture in different positions. (a), (b), (c) and (d) in Figure 7 respectively show that the variable aperture is in the first aperture position, the second aperture position, the third aperture position and the fourth aperture position, where according to When sorting by aperture size, the first aperture position < the second aperture position < the third aperture position < the fourth aperture position. When sorting by aperture value, the first aperture position > the second aperture position > the third aperture position > the fourth aperture position . For example, the size of the light entrance hole corresponding to the first aperture position is the smallest, and the size of the light entrance hole corresponding to the fourth aperture position is the largest.

In some embodiments, the first aperture position, the second aperture position, the third aperture position and the fourth aperture position may respectively be one aperture gear. As an example and not a limitation, the aperture value at the first aperture position may be F4.0, the aperture value at the second aperture position may be F2.8, the aperture value at the third aperture position may be F2.0, and the aperture value at the fourth aperture position may be F2.0. The aperture value can be F1.4. It can be understood that the above-mentioned aperture values corresponding to each aperture position are only exemplary, and the embodiments of the present application are not limited thereto. In some other embodiments, the variable aperture 300 may have more or fewer gears. The aperture value corresponding to each gear can be selected and designed according to actual needs, and will not be described in detail here.

It can be understood that the variable aperture 300 introduced in FIGS. 3 to 6 is only an exemplary structure. In other embodiments, other forms of variable apertures may also be used, which will not be described in detail here.

The light entrance holes of different aperture gears have different sizes, so the amount of light entering is different. Control of the amount of incident light has an important impact on imaging quality. The currently provided aperture gear control scheme uses closed-loop control. Specifically, the driver chip obtains the target position of the aperture and the actual position of the aperture, and controls the current used by the aperture motor to drive the movement of the blades through the deviation between the actual position of the aperture and the target position. The actual position of the aperture is detected by a Hall element (such as a Hall sensor). Taking the variable aperture 300 shown in FIGS. 3 to 6 as an example, the Hall element is fixed relative to the mover in the aperture motor, for example, the Hall element is fixed to the fixed carrier 331 . Taking the mover as a magnet and the stator as a coil as an example, the Hall element detects the actual position of the aperture by sensing changes in the magnetic field when the mover rotates relative to the stator around the optical axis. When the mover rotates relative to the stator around the optical axis, affected by the attitude of the variable aperture and external forces, the mover may also move along the optical axis relative to the stator, thus affecting the relative relationship between the Hall element and the magnet. position, and the magnetic field of the magnet is nonlinear, resulting in a large error between the aperture position detected by the Hall element and the true position of the aperture when the aperture is at the end aperture position (such as the maximum aperture position and the minimum aperture position), that is, Hall The accuracy of the aperture position detected by the Er element is low. Based on this, when the closed-loop control aperture is used to switch to the end aperture position, the control accuracy is low. In other words, the aperture is not actually at the end aperture position, so the amount of light entering will deviate greatly from the required amount of light entering, thus affecting the image quality.

Figure 8 shows a schematic diagram of the aperture position detected by the Hall element throughout the motor's stroke. As shown in Figure 8, the abscissa in the figure is the motor stroke, and the ordinate is the detection value of the Hall element. The values of the abscissa and ordinate are only exemplary. In the figure, the aperture gears include Q1 gear, Q2 gear, Q3 gear and Q4 gear as an example. The light entrance hole of Q1 gear > the light entrance hole of Q2 gear > the light entrance hole of Q3 gear > The light entrance hole of Q4 position. The figure exemplarily shows curves L1, L2, L3, L4 and L5. Between different curves, the gap between the Hall element and the magnet along the optical axis direction is different. As can be seen from Figure 8, the repeat consistency of the curves L1, L2, L3, L4 and L5 in the Q2 gear and Q3 gear is good, which shows that the gap between the Hall element and the magnet along the optical axis has an important impact on the Hall effect. The impact of the Er component on detecting Q2 aperture and Q3 aperture is small. As can be seen from Figure 8, the repeatability of the curves L1, L2, L3, L4 and L5 in the Q1 gear and Q4 gear is poor, which shows that when the motor is at both ends of the stroke, the Hall element and the magnet are in The gap along the optical axis direction has a greater impact on the aperture of the end gear of the Hall element detection. As shown in the figure, when the motor stroke is the maximum stroke in the forward direction or the maximum stroke in the reverse direction, the gap between the Hall element and the magnet along the optical axis is different, and the gap between the aperture positions detected by the Hall element is relatively large. big. Or, when the gaps between the Hall element and the magnet in the direction of the optical axis are different, although the aperture position detected by the Hall element is the same, the deviation of the motor stroke when the aperture is driven to reach the target position is large. In this way, when the posture of the variable aperture is different, the relative position of the Hall element and the magnet in the direction of the optical axis is affected, thereby affecting the accuracy of the Hall element detection, and thus affecting the control accuracy of the aperture gear. On this basis, when performing closed-loop control of the end aperture position of the aperture, the driver chip will adjust the drive current in real time based on the deviation between the aperture position detected by the Hall element and the target position. Users using the variable aperture will perceive the aperture The movement of the motor affects the user's experience.

Therefore, it is necessary to provide an aperture gear control strategy that can accurately, stably, and quickly control the aperture position in different shooting scenarios, so as to obtain images with better shooting quality.

FIG. 9 shows a schematic flow chart of an aperture control method provided by an embodiment of the present application.

The method 400 shown in FIG. 9 is applied to an aperture assembly, which may include a controller, a motor, and blades, where the controller is used to control the motor to drive the movement of the blades to form light entrance apertures with multiple apertures. For example, the aperture component may be the aperture component 210 introduced in FIG. 2 , more specifically, the aperture component may be the variable aperture 300 introduced in FIGS. 3 to 6 , or other variable aperture structures. For example, the controller may be the driver chip 390 in the variable aperture 300 . The motor may be an aperture motor in the variable aperture 300 . The blades may be blades 320 in the variable aperture 300 . In the embodiment of the present application, the aperture assembly includes a plurality of blades, which are arranged in an annular shape to allow light to pass through. light entrance hole. Since the size of the light inlet hole is adjustable, when the controller controls the movement of the motor-driven blade, light inlet holes with various apertures can be formed.

As shown in FIG. 9 , the method 400 may include steps S410 to S440. Each step will be described in detail below with reference to the accompanying drawings.

S410, the controller obtains the target aperture position of the aperture.

In some embodiments, the controller may receive an input signal or indication information for indicating a target aperture position of the aperture. For example, the input signal or indication information may be an aperture gear or an aperture value, which is not limited in the embodiment of the present application.

S420, when the target aperture position of the aperture is the first target position, the controller controls the motor to drive the blade to move with the first constant current until the blade is fixed at the first target position through the first limiting part, wherein the light entering the first target position The hole has the maximum aperture value.

That is to say, when the target aperture position of the aperture is the maximum aperture position, the controller controls the motor to drive the blade to move with a constant current (for example, a first constant current). When the blade is limited by the first limiter, the aperture is at the first position. Target position, that is, at the maximum aperture position.

In this step, the controller performs open-loop control. Here, the controller does not refer to the actual position of the aperture. As long as the blade is limited by the first limiting part, the aperture is considered to be at the first target position.

In the embodiments of the present application and the following embodiments, the “constant current” involved can be understood to mean that the magnitude of the current input to the motor is constant during a certain process of switching the aperture position. But it can be understood that this does not limit the magnitude of the current input to the motor to be the same during the process of switching the aperture position multiple times. That is to say, in the two processes in which the motor drives the blade to move with a constant current to achieve aperture position switching, for each aperture position switching process, the current input to the motor remains unchanged, and the two aperture position switching processes The amount of current input to the motor can be different during the process.

In some embodiments, after the controller controls the motor to drive the blade to move with a first constant current for a first preset time, it is considered that the blade is fixed at the first target position through the first limiting part.

In some embodiments, the first limiting part can unidirectionally limit the movement of the blade driven by the motor. That is to say, the first limiting portion can limit the motor-driven blade to continue to move in a direction greater than the maximum aperture position when the aperture is at the maximum aperture position, but does not limit the motor-driven blade to switch from the maximum aperture position to a smaller aperture. Location.

In the embodiment of the present application, the method of fixing the blade to the first target position through the first limiting part may be direct or indirect. That is to say, the first limiting part may directly limit the movement of the blade, or may indirectly limit the movement of the blade by limiting the movement of the motor, which is not limited in the embodiments of the present application.

S430, when the target aperture position of the aperture is the second target position, the controller controls the motor to drive the blade to move with the second constant current until the blade is fixed at the second target position through the second limiting part, wherein the light entering the second target position The hole has a minimum aperture value.

That is to say, when the target aperture position of the aperture is the minimum aperture position, the controller controls the motor to drive the blade movement with a constant current (for example, a second constant current). When the blade is limited by the second limiter, the aperture is in the second position. The target position is at the minimum aperture position.

In this step, the controller performs open-loop control. Here, the controller does not refer to the actual position of the aperture. As long as the blade is limited by the second limiting part, the aperture is considered to be at the second target position.

In some embodiments, after the controller controls the motor to drive the blade to move with a second constant current for a second preset time, it is considered that the blade is fixed at the second target position through the second limiting part.

In some embodiments, the second limiting portion can unidirectionally limit the movement of the blade driven by the motor. That is to say, the second limiting portion can limit the motor-driven blade to continue to move in a direction smaller than the minimum aperture position when the aperture is at the minimum aperture position, but does not limit the motor-driven blade to switch from the minimum aperture position to a larger aperture. Location.

In the embodiment of the present application, the method of fixing the blade to the second target position through the second limiting part may be direct or indirect. That is to say, the second limiting portion can directly limit the movement of the blade, or can indirectly limit the movement of the blade by limiting the movement of the motor, which is not limited in the embodiments of the present application.

S440, when the target aperture position of the aperture is the third target position, the controller obtains the actual aperture position of the aperture, and according to the deviation between the target aperture position of the aperture and the actual aperture position of the aperture, the controller controls the motor to drive with the third current The blade moves to a third target position, where the aperture of the light entrance hole at the third target position is smaller than the maximum aperture value and larger than the minimum aperture value.

That is to say, when the target aperture position of the aperture is between the maximum aperture position and the minimum aperture position, the controller can adjust the current of the motor-driven blade through the deviation between the target aperture position and the actual aperture position to drive the blade to move to the target Aperture location.

In this step, the controller performs closed-loop control. Here, the controller refers to the actual position of the aperture, and controls or adjusts the driving current through the deviation between the actual aperture position of the aperture and the target aperture position, so that the driving current output by the controller can automatically track the target aperture position. Therefore, in the embodiment of the present application, the magnitude of the third current changes dynamically with the deviation between the target aperture position of the aperture and the actual aperture position of the aperture. That is, the third current is a dynamic current.

In the embodiments of this application and the following embodiments, the "dynamic current" involved can be understood as that during a certain process of switching the aperture position, the magnitude of the current input to the motor is not always constant, that is, the magnitude of the current will change. . Specifically, the magnitude of the current may vary according to the magnitude of the deviation between the target aperture position of the aperture and the actual aperture position of the aperture. Because during a certain switching of the aperture position, as the blades move, the size of the deviation between the target aperture position of the aperture and the actual aperture position of the aperture will change, so the size of the current used to drive the motor movement will change accordingly. changes occur. It can be understood that this does not limit the changing trend of the current input to the motor during the process of switching the aperture position multiple times. For example, in the two processes in which the motor drives the blade to move with dynamic current to achieve aperture position switching, the current input to the motor may change from large to small for each aperture position switching process.

In the embodiment of the present application, when the deviation between the actual aperture position of the aperture and the target aperture position is less than a preset threshold, the aperture is considered to be at the third target position.

In the aperture control method 400 provided by the embodiment of the present application, when the target aperture position of the aperture is the maximum aperture position or the minimum aperture position, a combination of open-loop control and mechanical limit is used to achieve switching of the aperture position. When the target aperture position of the aperture is between the maximum aperture position and the minimum aperture position, closed-loop control is used to switch the aperture position. This solution can achieve the accuracy, speed and stability of aperture position control, so that the amount of light can be better controlled in different shooting scenarios, thereby obtaining images with good shooting quality.

More specifically, when the target aperture position of the aperture is the maximum aperture position or the minimum aperture position, open-loop control can avoid the relative position deviation between the Hall element and the magnet in the direction of the optical axis (that is, the axis direction of the light entrance hole). The impact of changes on aperture position control can improve the accuracy and stability of aperture position control. In addition, a mechanical limit is used to limit the position of the blade, so that the first constant current or the second constant current can be larger, which can increase the speed of blade movement, thereby improving the speed of aperture position control.

It should be noted that in the method 400 shown in Figure 9, steps S420, S430 and S440 are parallel optional steps. After the target aperture position in step S410 is determined, the corresponding one of steps S420, S430 and S440 is The steps are executed.

In some embodiments, the motor includes a magnet and a coil. One of the magnet and the coil is a stator, and the other is a mover. The mover is used to drive the blade to move to change the aperture of the light entrance hole. When the target aperture position of the aperture is the first target position, the first constant current is used to input into the coil to provide a first magnetic force for driving the mover to rotate around the axis of the aperture. When the target aperture position of the aperture is the second target position, the second constant current is used to input into the coil to provide a second magnetic force for driving the mover to rotate around the axis of the aperture, wherein the first magnetic force is related to the second The direction of magnetic force is opposite.

The direction in which the first constant current is input into the coil to drive the mover to rotate is opposite to the direction in which the second constant current is input into the coil to drive the mover to rotate. The aperture can be switched to the maximum aperture position or the minimum aperture within a certain drive current range. Location.

Here, the first magnetic force and the second magnetic force are both tangent to the radial direction of the mover, and the radial direction of the mover is perpendicular to the axis of the light entrance hole.

In some embodiments, the first magnetic force is greater than the friction force experienced by the mover, and the second magnetic force is greater than the friction force experienced by the mover.

When the motor is at rest, the mover will experience friction. Therefore, if the mover is driven to rotate around the axis of the light hole to drive the blades, the magnetic force generated by the current input to the coil should at least overcome the friction experienced by the mover. force.

It should be noted that the first constant current means that in the process of switching the aperture position to the first target position, the current of the driving motor is constant, that is, the current magnitude is unchanged, but it does not limit the current to the aperture position every time. When the position is switched to the first target position, the current of the drive motor is the same. The second constant current means that during the process of switching the aperture position to the second target position, the current of the driving motor is constant, that is, the current magnitude is unchanged, but it does not limit the fact that the aperture position is switched to the second target position each time. At the target position, the current of the drive motor is the same.

In the embodiment of the present application, the first constant current and the second constant current may be the same or different.

In some embodiments, method 400 may further include: when the target aperture position of the aperture is the first target position, after the blade is fixed at the first target position, the controller controls the motor to drive the blade with a fourth constant current to keep it at the first target position. target position, wherein the fourth constant current is less than the first constant current and greater than 0; or, when the target aperture position of the aperture is the second target position, after the blade is fixed at the second target position, the controller controls the motor to run at the fifth constant The current drives the blade to maintain the second target position, wherein the fifth constant current is less than the second constant current and greater than 0.

That is to say, when the position of the aperture reaches the target aperture position, the controller can reduce the current of the drive motor to keep the aperture at the target aperture position, which can reduce power consumption.

In the embodiment of the present application, the fourth constant current and the fifth constant current may be the same or different.

It should be noted that the fourth constant current means that in the process of maintaining the aperture position at the first target position, the current driving the motor is constant, that is, the magnitude of the current is unchanged, but it does not limit the current to the aperture position every time. When the position is maintained at the first target position, the current of the drive motor is the same. The fifth constant current means that in the process of maintaining the aperture position at the second target position, the current driving the motor is constant, that is, the current size is unchanged, but it does not limit the aperture position to be maintained at the second target position every time. At the target position, the current of the drive motor is the same.

In some embodiments, method 400 may also include: when the aperture is in a preset scene, the controller controls the motor to drive the blade to move to form a light entrance hole with a maximum aperture value, wherein the blade is fixed by a locking mechanism, and the aperture is in the preset scene. The stress in the scene is greater than or equal to the preset value.

In the embodiment of the present application, when the stress on the aperture is greater than or equal to the preset value, no matter what aperture position the aperture is in, the controller controls the motor to drive the blade movement to form a light entrance hole with the maximum aperture value. In other words, no matter what aperture position the aperture is in, switch the aperture to the position with the largest aperture. In this way, the aperture blades are in a contracted state, and the aperture blades can also be fixed by the locking mechanism, which can protect the blades and reduce the possibility of damage to the blades when they are subjected to large stress.

In some embodiments, whether the aperture is in a preset scene may be determined based on gyroscope signals and/or acceleration signals.

In some embodiments, the preset scene is a scene in which the aperture blades are easily damaged. For example, the preset scene includes at least one of the following scenes: a beating scene, a swinging scene, and a falling scene.

In some embodiments, when the aperture is in a preset scene, the controller controls the motor to drive the blade movement to form a light entrance hole with a maximum aperture value, which may be open-loop control or closed-loop control.

For example, the controller can control the motor to drive the blade movement with a constant current to form a light entrance hole with a maximum aperture value. This process is similar to the process in which the controller controls the aperture to switch to the first target position. For details, please refer to the above related description of switching the aperture position to the first target position. The constant current and the first constant current may be the same or different.

For another example, the controller can control the motor to drive the blade movement with a dynamic current to form a light entrance hole with a maximum aperture value based on the deviation between the actual aperture position of the aperture and the maximum aperture position of the aperture. This process is similar to the process in which the controller controls the aperture to switch to the third target position. For details, please refer to the above related description of switching the aperture position to the third target position. The dynamic current changes dynamically with the deviation between the maximum aperture position of the aperture and the actual aperture position of the aperture.

In some embodiments, method 400 may further include: before the motor is powered off, the controller controls the motor to drive the blade to move to form a light inlet with a maximum aperture value.

In the embodiment of the present application, before the motor is powered off, no matter what aperture position the aperture is in, the aperture is switched to the position with the largest aperture. In this way, the aperture blades are in a contracted state, which can protect the blades and reduce the possibility of damage to the blades.

In some embodiments, method 400 may further include: after the motor is powered off, when the aperture is in a preset scene, the controller controls the motor to power on, and controls the motor to drive the blade movement to form a light entrance hole with a maximum aperture value, The blades are fixed by a locking mechanism, and the stress the aperture receives in the preset scene is greater than or equal to the preset value.

In the embodiment of the present application, after the motor is powered off, if the aperture is subjected to great stress, the controller can control the motor to power on again and switch the aperture to the position with the largest aperture. In this way, the aperture blades are in a contracted state, which can protect the blades and reduce the possibility of damage to the blades.

In some embodiments, the aperture value of the first target position is less than or equal to 1.4, and the aperture value of the second target position is greater than or equal to 4.0.

The blades in the variable aperture are made of fragile materials. They are easily damaged by external forces under severe stress conditions such as falling, beating, and swinging. In view of this, embodiments of the present application also provide an aperture control method that can solve the problem of protecting the variable aperture blades.

An embodiment of the present application provides an aperture control method that is applied to an aperture assembly. The aperture assembly includes a controller, a motor, and a blade. The controller is used to control the motor to drive the movement of the blades to form light entrance holes with multiple apertures. The method includes: when the aperture is in a preset scene, the controller controls the motor to drive the movement of the blade to form a light entrance hole with a maximum aperture value, wherein the blade is fixed by a locking mechanism, and the stress the aperture receives in the preset scene is greater than or equal to default value.

For example, taking the variable aperture 300 introduced in FIG. 3 as an example, FIG. 10 shows a schematic diagram of the variable aperture 300 in the maximum aperture position. As shown in FIG. 10 , the blades 320 are in a retracted state and are covered by the upper cover 310 . The upper cover 310 plays a role in protecting the blades 320 .

In the embodiment of the present application, when the aperture is under great stress, no matter what aperture position the aperture is in, the controller switches the aperture to the maximum aperture position, and uses a locking mechanism to fix the blades. In this way, the aperture blades are in a contracted state, which can reduce the possibility of damage to the blades.

It should be noted that the locking mechanism involved in the embodiment of the present application can directly fix the position of the aperture blade. The position of the aperture motor mover may also be fixed to fix the position of the blades, which is not specifically limited in the embodiments of the present application. The locking mechanism can adopt any structure that can fix the position of the blade, such as a ratchet and pawl mechanism.

In some embodiments, when the aperture is in a preset scene and the motor is powered on, the controller controls the motor to drive the blade movement to form a light entrance hole with a maximum aperture value, including: the controller controls the motor to drive with a first constant current. The blade starts to move from the current position until the blade forms the light entrance hole with the maximum aperture value.

That is to say, when the motor is powered on and the aperture needs to be switched to the maximum aperture position, the controller can perform open-loop control so that the motor drives the blade to move with a first constant current.

In some embodiments, when the aperture is in a preset scene and the motor is powered off, the controller controls the motor to drive the blade movement to form a light entrance hole with a maximum aperture value, including: the controller controls the motor to power on; the controller controls The motor drives the blade to move from the current position with a first constant current until the blade forms a light inlet with a maximum aperture value.

That is to say, when the motor is powered off and the aperture needs to be switched to the maximum aperture position, the controller can first control the motor to power on, and then perform open-loop control so that the motor drives the blade to move with a first constant current.

In some embodiments, whether the aperture is in a preset scene may be determined based on gyroscope signals and/or acceleration signals.

In order to facilitate understanding, the aperture control method provided by the embodiment of the present application is introduced below with specific examples.

Figure 11 shows a schematic flow chart of an aperture control method provided by an embodiment of the present application. In Figure 11, for the convenience of understanding, the variable aperture includes four gears Z1, Z2, Z3, and Z4 as an example. The aperture values of the four gears are F/4.0, F/2.8, F2.0, F1.4, where the Z1 gear has the minimum aperture value and the Z4 gear has the maximum aperture value. However, it can be understood that this application does not specifically limit the number of gears included in the variable aperture and the aperture value of each gear. This is only an exemplary description.

As shown in Figure 11, in normal shooting scenarios, the motor needs to control different aperture gears to meet different shooting scenarios.

If the target aperture position is Z1, open-loop control combined with mechanical limit can be used to switch the aperture position to Z1. Specifically, the controller can open-loop control the motor to drive the blade to move with a first constant current until the blade is fixed at the Z1 gear through the first limiting part. When adjusting the aperture to Z1, the aperture sensitivity value is large and the position changes sensitively. The positions of the Hall element and the magnet will be affected by the gap along the axis of the light entrance hole. If closed-loop control is used, the feedback value will be inaccurate. . Therefore, the process of adjusting the aperture to the Z1 gear should not use closed-loop control but open-loop control. Since there is no feedback information in open-loop control, a mechanical limit is used to stop the motor or blade from continuing to move to fix the position of the blade, thereby achieving accurate, fast and stable aperture gear control.

If the target aperture position is Z4, open-loop control combined with mechanical limit can be used to switch the aperture position to Z4. Specifically, the controller may open-loop control the motor to drive the blade to move with a second constant current until the blade is fixed at the Z4 gear through the second limiting part. Since there is no feedback information in open-loop control, a mechanical limit is used to stop the motor or blade from continuing to move to fix the position of the blade, thereby achieving accurate, fast and stable aperture gear control.

If the target aperture position is Z2 or Z3, you can use closed-loop control to switch the aperture position to Z2 or Z3. Specifically, the actual aperture position fed back by the Hall element is compared with the target aperture position to generate a deviation signal. The deviation signal can be used to control and adjust the current of the drive motor generated by the controller, so that the output of the closed-loop control system ( That is, the aperture position to be switched to determined by the controller) can automatically track the input quantity (that is, the target aperture position), reduce tracking errors, improve control accuracy, and suppress the influence of disturbance signals.

When switching aperture gears, switch from Z1 gear to Z2 gear, or switch from Z2 gear to Z1 gear, or switch from Z3 gear to Z4 gear, or switch from Z4 gear to Z3 gear. , need to perform open-loop control and closed-loop Ring controlled switching. When the target position is Z2 or Z3, the aperture can be accurately and quickly switched to the target position through closed-loop control. When the target position is Z1 or Z4, the aperture can be quickly and accurately switched to the target position based on open-loop control and the mechanical limit is used to fix the blade. In the embodiment of the present application, the switching time between closed-loop control and open-loop control is within 10 ms.

In the embodiments of this application, the method of open and closed loop control combined with mechanical limit can be used to switch a variety of aperture gears, which can solve problems such as inaccurate feedback of the Hall element and insensitive position of some apertures caused by many aperture gears. The purpose of arbitrarily switching multiple aperture gears is achieved. In addition, the open-loop control combined with the mechanical limit strategy improves the accuracy of open-loop control.

It can be understood that in normal shooting scenarios, the motor of the variable aperture is powered on, that is, the camera module using the variable aperture is powered on.

In some embodiments, during normal shooting, if it is detected that the aperture is subject to large stress, the emergency protection scene is entered. As shown in Figure 11, in the emergency protection scenario, no matter what position the aperture is in, open-loop control combined with mechanical limit is used to switch the aperture position to the Z4 position, so that the aperture blades are in a retracted protection state. Generally, the aperture is subject to greater stress in scenes such as being slapped, dropped, and shaken. In the embodiments of this application, the aperture is subject to large stress, which can be understood to mean that the stress on the aperture is greater than or equal to the preset value. In a specific implementation, it can be determined whether the aperture is in a large stress scene through the gyroscope signal and/or the acceleration signal. For example, when the angular velocity of the aperture component is greater than or equal to a first preset threshold, and/or the acceleration of the aperture component is greater than or equal to a second preset threshold, it can be determined that the aperture is in a large stress scene, but embodiments of the present application are not limited thereto.

In the embodiment of the present application, when the blades of the variable aperture are subject to large stress from the outside world, such as when the variable aperture lens is slapped, shaken or dropped, the controller can control the aperture to be set to the Z4 gear to lock the blades. In the retracted state, the possibility of damage to the diaphragm blades can be reduced.

In some embodiments, after normal shooting is completed and before the motor is powered off (or before the camera module using a variable aperture is powered off), regardless of the position of the aperture, the aperture position is switched to Z4, so that the aperture The leaves are in a shrinking protection state. For example, in a specific implementation, after the motor is powered off, the position of the aperture blades can be fixed through friction and magnetic attraction between the magnetic conductive sheet and the magnet. Therefore, as shown in Figure 11, in the power-off scene, the aperture position defaults to Z4.

In the embodiment of this application, the aperture is set to the Z4 position before the motor is powered off, and the blades are locked in a retracted state, which can protect the blades from minimal external force and reduce the possibility of damage to the variable aperture blades.

In some embodiments, in a power-off scenario, it is necessary to detect in real time whether the aperture is in a large stress scenario.

In some embodiments, in a power-off scenario, if it is detected that the aperture is subject to large stress, the motor is powered on and the emergency protection scenario is entered. As shown in Figure 11, in the emergency protection scenario, no matter what position the aperture is in, open-loop control combined with mechanical limit is used to switch the aperture position to the Z4 position, so that the aperture blades are in a retracted protection state. In a specific implementation, it can be determined whether the aperture is in a large stress scene through the gyroscope signal and acceleration signal.

In the embodiment of this application, even if the aperture is powered off, once it is detected that the aperture is in a large stress scene, the protection mechanism for the blades will be triggered, that is, the aperture position will be switched to the Z4 position, which can reduce the possibility of damage to the blades.

In the embodiment of the present application, a strategy that combines open-loop control and closed-loop control is adopted to achieve accuracy, speed, and stability of aperture gear control. At the same time, large-stress scenes are detected in real time based on accelerometer and/or gyroscope signals. In this scene, the aperture is converted to a large aperture mode (that is, the aperture position is at the Z4 position) through open-loop control combined with a mechanical limit method, achieving variable Emergency protection mechanism for aperture blades. In addition, when a camera module using a variable aperture is powered off, it defaults to the large aperture mode, which can ensure minimal external influence and a more ideal appearance design.

Figure 12 shows a schematic flow chart of open-loop control and closed-loop control provided by the embodiment of the present application. As shown in Figure 12, when the aforementioned open-loop control method is used, after obtaining the target aperture position, the controller can control the motor to drive the blade movement with a constant current to switch the aperture to the target aperture position. When using closed-loop control, the Hall element can detect the actual aperture position of the aperture and feed it back to the controller. The controller adjusts the driving current in real time based on the deviation between the target aperture position and the actual aperture position to switch the aperture to the target aperture position. .

An embodiment of the present application provides an aperture controller configured to perform the foregoing aperture control method.

Embodiments of the present application provide an aperture assembly, including a controller, a motor and blades. The controller is used to control the movement of the motor to drive the blades to form light entrance holes with multiple apertures, and the controller is used to perform the aforementioned aperture control method.

An embodiment of the present application provides a camera module, including a lens and the aforementioned aperture component. The aperture component is disposed at the front end of the lens to form a light inlet with multiple apertures.

An embodiment of the present application provides an electronic device, including a camera module as claimed in the preceding claims and a housing for accommodating the camera module.

Embodiments of the present application provide an electronic device, including: one or more processors; one or more memories; one or more memories store one or more computer programs, and the one or more computer programs include instructions. When the instructions When executed by one or more processors, the electronic device is caused to execute the aforementioned aperture control method.

Embodiments of the present application provide a computer-readable storage medium that includes computer instructions. When the computer instructions are run on an electronic device, the electronic device causes the electronic device to execute the aforementioned aperture control method.

An embodiment of the present application provides a chip. The chip includes a processor and a data interface. The processor reads instructions stored in the memory through the data interface to execute the aforementioned aperture control method.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, 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 described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

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

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.

If the functions are implemented in the form of 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 the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (24)

1. An aperture control method, characterized in that it is applied to an aperture assembly. The aperture assembly includes a controller, a motor and blades. The controller is used to control the motor to drive the movement of the blades to form light entrances with multiple apertures. hole, the method includes:

   The controller obtains the target aperture position of the aperture;

   When the target aperture position of the aperture is the first target position, the controller controls the motor to drive the blade to move with a first constant current until the blade is fixed to the first target through the first limiting part. Position, wherein the light entrance hole of the first target position has the largest aperture value among the plurality of apertures;

   When the target aperture position of the aperture is the second target position, the controller controls the motor to drive the blade to move with a second constant current until the blade is fixed to the second target through the second limiting part. position, wherein the light entrance hole of the second target position has the smallest aperture value among the plurality of apertures;

   When the target aperture position of the aperture is the third target position, the controller obtains the actual aperture position of the aperture;

   According to the deviation between the target aperture position of the aperture and the actual aperture position of the aperture, the controller controls the motor to drive the blade to move to the third target position with a third current, wherein the third current The apertures of the light entrance holes at the three target positions are smaller than the maximum aperture value and larger than the minimum aperture value.
2. The method of claim 1, wherein the magnitude of the third current changes dynamically with the deviation between the target aperture position of the aperture and the actual aperture position of the aperture.
3. The method according to claim 1 or 2, characterized in that,

   When the target aperture position of the aperture is the first target position or the second target position, the controller performs open-loop control;

   When the target aperture position of the aperture is the third target position, the controller performs closed-loop control.
4. The method according to any one of claims 1 to 3, wherein the motor includes a magnet and a coil, one of the magnet and the coil is a stator, and the other is a mover, and the The mover is used to drive the blade to move to change the aperture of the light inlet;

   When the target aperture position of the aperture is the first target position, the first constant current is used to input into the coil to drive the mover to rotate around the axis of the light inlet. the first magnetic force; or

   When the target aperture position of the aperture is the second target position, the second constant current is used to input into the coil to drive the mover to rotate around the axis of the light inlet. the second magnetic force;

   Wherein, the direction of the first magnetic force and the second magnetic force are opposite.
5. The method according to any one of claims 1 to 4, characterized in that the method further includes:

   When the target aperture position of the aperture is the first target position, after the blade is fixed at the first target position, the controller controls the motor to drive the blade with a fourth constant current to keep it at the first target position. The first target position, wherein the fourth constant current is less than the first constant current and greater than 0; or,

   When the target aperture position of the aperture is the second target position, after the blade is fixed at the second target position, the controller controls the motor to drive the blade with a fifth constant current to keep it at the second target position. The second target position, wherein the fifth constant current is less than the second constant current and greater than 0.
6. The method according to any one of claims 1 to 5, characterized in that the method further includes:

   When the aperture is in a preset scene, the controller controls the motor to drive the blade movement to form a A light inlet with a maximum aperture value, wherein the blade is fixed by a locking mechanism, and the stress experienced by the aperture in the preset scene is greater than or equal to the preset value.
7. The method of claim 6, wherein the controller controls the motor to drive the blade to move to form a light entrance hole with a maximum aperture value, including:

   The controller controls the motor to drive the blade movement with a constant current to form the light entrance hole with the maximum aperture value; or,

   The controller controls the motor to drive the blade movement with dynamic current to form the light entrance hole with the maximum aperture value based on the deviation between the actual aperture position of the aperture and the maximum aperture position of the aperture.
8. The method according to any one of claims 1 to 7, characterized in that the method further includes:

   Before the motor is powered off, the controller controls the motor to drive the blade to move to form a light entrance hole with a maximum aperture value.
9. The method of claim 8, further comprising:

   After the motor is powered off, when the aperture is in a preset scene, the controller controls the motor to power on, and controls the motor to drive the blade movement to form a light entrance hole with a maximum aperture value, The blade is fixed by a locking mechanism, and the stress experienced by the aperture in the preset scene is greater than or equal to the preset value.
10. The method according to claim 6 or 9, characterized in that the aperture in the preset scene is determined based on a gyroscope signal and/or an acceleration signal.
11. The method according to claim 6 or 9, characterized in that the preset scene includes at least one of the following scenes: a beating scene, a swinging scene, and a falling scene.
12. The method according to any one of claims 1 to 11, wherein the aperture value of the first target position is less than or equal to 1.4, and the aperture value of the second target position is greater than or equal to 4.0.
13. An aperture control method, characterized in that it is applied to an aperture assembly. The aperture assembly includes a controller, a motor and a blade. The controller is used to control the motor to drive the movement of the blade to form a light entrance with multiple apertures. hole, the method includes:

    When the aperture is in the preset scene, the controller controls the motor to drive the blade to move to form a light entrance hole with a maximum aperture value, wherein the blade is fixed by a locking mechanism, and the aperture is in the preset position. The stress in the scene is greater than or equal to the preset value.
14. The method according to claim 13, characterized in that when the aperture is in a preset scene and the motor is in a power-on state, the controller controls the motor to drive the blade to move to form an aperture with a maximum aperture value. The light entrance holes include:

    The controller controls the motor to drive the blade to move from the current position with a first constant current until the blade forms the light inlet with the maximum aperture value.
15. The method according to claim 13, characterized in that when the aperture is in a preset scene and the motor is in a power-off state, the controller controls the motor to drive the blade to move to form an aperture with a maximum aperture value. The light entrance holes include:

    The controller controls the power on of the motor;

    The controller controls the motor to drive the blade to move from the current position with a first constant current until the blade forms the light inlet with the maximum aperture value.
16. The method according to any one of claims 13 to 15, wherein the aperture is in a preset scene determined based on a gyroscope signal and/or an acceleration signal.
17. The method according to any one of claims 13 to 16, characterized in that the preset scene includes at least one of the following scenes: a beating scene, a swinging scene, and a falling scene.
18. An aperture controller, characterized in that the aperture controller is configured to perform the method according to any one of claims 1 to 17.
19. An aperture assembly, characterized in that it includes a controller, a motor and blades, the controller is used to control the motor to drive the movement of the blades to form light entrance holes with multiple apertures, and the controller is used to perform the following steps: The method of any one of claims 1 to 17.
20. A camera module, characterized by comprising a lens and an aperture assembly as claimed in claim 19, the aperture assembly being disposed at the front end of the lens to form a light inlet with multiple apertures.
21. An electronic device, characterized in that it includes the camera module as claimed in claim 20 and a casing for accommodating the camera module.
22. An electronic device, characterized by including:

    one or more processors;

    one or more memories;

    The one or more memories store one or more computer programs, the one or more computer programs including instructions that, when executed by the one or more processors, cause the electronic device to perform, e.g. The method of any one of claims 1 to 17.
23. A computer-readable storage medium, characterized by comprising computer instructions, which when the computer instructions are run on an electronic device, cause the electronic device to perform the method according to any one of claims 1 to 17.
24. A chip, characterized in that the chip includes a processor and a data interface, and the processor reads instructions stored in the memory through the data interface to execute the instructions as described in any one of claims 1 to 17 method.