Camera module and electronic equipment

Abstract

The invention provides a camera module and electronic equipment, relates to the technical field of cameras, and can solve the problem that the camera module is easy to vibrate under the action of external force. The camera module comprises a lens assembly, a first processor and a driving module; a magnetic component in the driving module is fixed at the periphery of the lens bracket; the magnetic component and the lens bracket are positioned in the shell; the first circuit board is fixed to the outer side of the shell, the electromagnetic assembly is fixed to the side face, facing the shell, of the first circuit board, and the first circuit board is electrically connected with the electromagnetic assembly and the first processor; the lens support is used for fixing a lens assembly. If the first processor detects that the lens assembly switches the focusing mode, the first processor controls to input a power-on current in a first direction or a second direction to the first circuit board, the magnetic assembly can drive the lens support and the lens assembly to parallelly move by a first distance between the bottom of the shell and the top of the shell under the action of magnetic repulsive force or magnetic attraction force of the electromagnetic assembly, and the first direction is opposite to the second direction.

Description

Technical Field

[0001] The present application belongs to the field of camera technology, and in particular relates to a camera module and an electronic device. Background Art

[0002] The camera module is an important component for mobile phones, cameras, tablet computers and other electronic devices to realize the camera function. Generally, the camera module includes a lens assembly, a drive module and an image sensor arranged in a housing. The drive module can drive the lens assembly to move, thereby adjusting the distance between the lens assembly and the image sensor, changing the image distance, and enabling the camera module to obtain a clear image.

[0003] The driving module generally includes an upper spring sheet, a coil, a permanent magnet and a lower spring sheet. The outer edges of the upper spring sheet and the lower spring sheet are fixed on the shell, the middle parts of the upper spring sheet and the lower spring sheet are connected to the lens assembly, and the coil is arranged on the periphery of the lens assembly. Through the interaction force generated between the coil and the permanent magnet when powered on and the elastic force of the upper and lower spring sheets, the lens assembly can be controlled to move in a limited direction to realize the autofocus function.

[0004] The upper and lower springs in the drive module are both parts with relatively high elasticity. When users move and take photos, the electronic device will shake, and the upper and lower springs will also vibrate, thus affecting the accuracy of the camera module's autofocus. Summary of the invention

[0005] The present application provides a camera module and an electronic device, which to a certain extent solve the problem that the shrapnel-type driving module of the existing camera module is prone to vibration under the action of external force.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In the first aspect, the present application provides a camera module, characterized in that it includes: a lens assembly, a first processor and a driving module; the driving module includes: a shell, a lens holder, a magnetic assembly, a first circuit board and an electromagnetic assembly; the magnetic assembly is fixed to the periphery of the lens holder, and the magnetic assembly and the lens holder are located in the accommodating cavity of the shell; the first circuit board is fixed to the outer side of the shell facing away from the lens holder, the electromagnetic assembly is fixed to the side of the first circuit board facing the shell, and the first circuit board is electrically connected to the electromagnetic assembly and the first processor respectively; the lens holder, the shell and the first circuit board are all hollow structures, and the hollow structure is used to fix the lens assembly; if the first processor detects that the focus mode of the lens assembly is switched from the first focus mode to the second focus mode If the first processor controls the input of a current in a first direction to the first circuit board, the magnetic component drives the lens holder and the lens assembly to move parallel to the first distance from the bottom of the shell to the direction away from the electromagnetic component under the magnetic repulsion of the electromagnetic component, and then the top of the magnetic component abuts against the top of the shell; if the first processor detects that the focus mode of the lens assembly is switched from the second focus mode to the first focus mode, the first processor controls the input of a current in a second direction to the first circuit board, the magnetic component drives the lens holder and the lens assembly to move parallel to the first distance from the top of the shell to the direction close to the electromagnetic component under the magnetic attraction of the electromagnetic component, and then the bottom of the magnetic component abuts against the bottom of the shell, and the first direction is opposite to the second direction.

[0008] In the camera module provided in the embodiment of the present application, the magnetic component and the lens holder fixedly connected to the magnetic component are located inside the shell, and the electromagnetic component is fixed outside the shell. When the first processor detects that the current focus mode of the lens assembly is switched to the first focus mode or the second focus mode, it can control the direction of the current corresponding to the current focus mode to be passed into the first circuit board, so that magnetic attraction and magnetic repulsion are generated between the electromagnetic component and the magnetic component, so that under the action of the magnetic attraction, the magnetic component drives the lens holder and the lens assembly to move parallel to the bottom of the accommodating cavity in the direction close to the electromagnetic component, or under the action of the magnetic repulsion, the magnetic component drives the lens holder and the lens assembly to move parallel to the direction away from the electromagnetic component to the top of the accommodating cavity, thereby realizing a two-stage focusing function. The accommodating cavity of the shell can limit the moving distance of the magnetic component and the lens holder, and the lens assembly moves parallel to achieve focusing under the magnetic force of the electromagnetic component and the magnetic component, and is not easily shaken by external force.

[0009] In a possible design, the first distance is the height difference between the accommodating cavity and the magnetic component; the first distance is expressed as:

[0010]

[0011] Wherein, L represents the first distance, f represents the focal length of the lens of the lens assembly, u1 represents the focus object distance when the lens assembly is in the second focus mode, and u2 represents the focus object distance when the lens assembly is in the first focus mode.

[0012] Based on this optional design, the difference between the image distance when the lens assembly is in telephoto mode for shooting and the image distance when the lens assembly is in macro mode for shooting is equal to the first distance that the magnetic assembly and the lens holder move parallel to each other in the accommodating chamber when the camera module switches the focus mode, and the height difference between the accommodating chamber and the magnetic assembly determines the first distance that the magnetic assembly and the lens holder move in the shell. Therefore, according to the different focal lengths of the lenses in different lens assemblies, the first distance that the magnetic assembly and the lens holder move in the accommodating chamber along the optical axis direction when the lens assembly switches the focus mode can be determined based on the above formula, and then the height of the accommodating chamber of the matching shell is set according to the maximum moving distance and the height of the magnetic assembly, thereby setting a shell with an adaptive height for different lens assemblies.

[0013] In one possible design, the magnetic component includes at least two permanent magnets, which are symmetrically distributed on the periphery of the lens holder; the electromagnetic component includes at least two electromagnets, which correspond one to one to the permanent magnets; and one magnetic pole of the permanent magnet is arranged opposite to one end of the corresponding electromagnet.

[0014] Based on this optional design, the electromagnets in the electromagnetic assembly correspond one to one with the permanent magnets in the magnetic assembly. By simultaneously changing the direction of the input current in all the electromagnets in the magnetic assembly, the same interaction force can be generated between each electromagnet and the corresponding permanent magnet, thereby driving all the permanent magnets in the magnetic assembly to move simultaneously along the optical axis of the lens assembly. In addition, multiple permanent magnets are symmetrically distributed around the periphery of the lens holder, which can enable the lens holder and the lens assembly to move smoothly along the optical axis, and avoid the lens holder and the lens assembly from tilting relative to the housing due to uneven force during movement.

[0015] In a possible design, the shell includes: an upper cover; the upper cover includes: an upper substrate and an extension portion extending from the edge of the upper substrate toward the first circuit board; the upper substrate is a hollow structure, and the material of the upper substrate is a soft magnetic material.

[0016] Based on this possible design, when the movable component moves to the top of the shell, the current in the coil of the electromagnet can be disconnected. Through the magnetic attraction between one of the magnetic poles of the permanent magnet facing away from the electromagnet and the upper substrate, the magnetic component and the lens holder can be fixed to the top of the shell accommodating cavity, so that the lens assembly remains in the second focusing mode, thereby saving energy.

[0017] In a possible design, the extension portion is made of non-magnetic material.

[0018] Based on this possible design, when the upper cover is closed on the base, the extension portion of the upper cover is located at the side end of the permanent magnet, and the extension portion made of non-magnetic material can avoid affecting the magnetic force generated between the permanent magnet and the electromagnet.

[0019] In a possible design, the shell also includes: a base, an upper cover is covered on the base and forms a accommodating cavity with the base; the base includes: a lower substrate and a surrounding edge extending from the edge of the lower substrate toward the upper substrate; the lower substrate is a hollow structure, and the first circuit board is fixed to the side of the lower substrate facing away from the lens holder; the outer wall of the surrounding edge is provided with an avoidance groove for clamping with the extension part.

[0020] Based on this optional design, when the upper cover is closed on the base, the extension portion of the upper cover can be inserted into and clamped in the avoidance groove of the base to improve the firmness of the upper cover and the base.

[0021] In a possible design, a through hole corresponding to each electromagnet is provided on the lower substrate; one end of the electromagnet is opposite to one magnetic pole of the corresponding permanent magnet through the through hole, and the other magnetic pole of the permanent magnet is opposite to the upper substrate.

[0022] Optionally, the electromagnet is located in the corresponding through hole.

[0023] Based on this possible design, one end of the electromagnet can be opposite to a magnetic pole of the corresponding permanent magnet through the through hole on the lower substrate. When the movable component moves to the bottom of the shell, the current in the coil of the electromagnet can be disconnected. Through the magnetic attraction of a magnetic pole of the permanent magnet facing the electromagnet to the magnetic core of the electromagnet, the movable component can be fixed to the bottom of the shell accommodating cavity, so that the lens assembly remains in the telefocus mode, thereby saving energy.

[0024] In a possible design, the edge of the lens holder is provided with notches corresponding to at least two permanent magnets one by one; the permanent magnets are fixed at the corresponding notches.

[0025] Based on this possible design, fixing the permanent magnet at the notch of the lens holder can increase the contact area between the permanent magnet and the lens holder, making the connection between the permanent magnet and the lens holder more stable, so that the permanent magnet can smoothly drive the lens holder to move.

[0026] Optionally, the first focus mode is a telephoto mode, and the second focus mode is a macro mode.

[0027] In a second aspect, the present application provides an electronic device, including a camera module provided by various possible designs of the aforementioned first aspect.

[0028] In a third aspect, the present application provides another electronic device, including a lens assembly, a driving module and a second processor, the driving module being electrically connected to the second processor; the driving module comprising: a shell, a lens holder, a magnetic assembly, a first circuit board and an electromagnetic assembly; the magnetic assembly is fixed to the periphery of the lens holder, and the magnetic assembly and the lens holder are located in a accommodating cavity of the shell; the first circuit board is fixed to the outer side of the shell facing away from the lens holder, the electromagnetic assembly is fixed to the side of the first circuit board facing the shell, and the first circuit board is electrically connected to the electromagnetic assembly; the lens holder, the shell and the first circuit board are all hollow structures, and the hollow structure is used to fix the lens assembly; if the second processor detects that the focus mode of the lens assembly is switched from the first focus mode to the second focus mode If the second processor controls the input of a current in a first direction to the first circuit board, the magnetic component drives the lens holder and the lens assembly to move parallel to the first distance from the bottom of the shell to the direction away from the magnetic component under the magnetic repulsion of the electromagnetic component, and then the top of the magnetic component abuts against the top of the shell; if the second processor detects that the focus mode of the lens assembly is switched from the second focus mode to the first focus mode, the second processor controls the input of a current in a second direction to the first circuit board, the magnetic component drives the lens holder and the lens assembly to move parallel to the first distance from the top of the shell to the direction close to the magnetic component under the magnetic attraction of the electromagnetic component, and then the bottom of the magnetic component abuts against the bottom of the shell, and the first direction is opposite to the second direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the overall structure of a camera module provided in an embodiment of the present application.

[0031] Figure 3 It is a schematic diagram of the exploded structure of a camera module provided in an embodiment of the present application.

[0032] Figure 4 It is a schematic diagram of the overall structure of a drive module provided in an embodiment of the present application.

[0033] Figure 5 It is a schematic diagram of the exploded structure of a drive module provided in an embodiment of the present application.

[0034] Figure 6 It is a schematic diagram of the overall structure of a drive module and a lens assembly provided in an embodiment of the present application.

[0035] Figure 7 yes Figure 6 Top view of the .

[0036] Figure 8It is a structural schematic diagram of the magnetic component and the electromagnetic component provided in an embodiment of the present application when they are in a first relative position.

[0037] Fig. 9 yes Figure 7 AA cross-sectional view when the middle lens assembly and the movable assembly are located at the bottom of the housing.

[0038] Fig.10 It is a structural schematic diagram when the magnetic component and the electromagnetic component provided in an embodiment of the present application are in a second relative position.

[0039] Fig.11 yes Figure 7 AA cross-sectional view of the center lens assembly and movable assembly located at the top of the housing.

[0040] Fig.12 It is a flow chart of a method for a second processor in an electronic device provided in an embodiment of the present application to control a camera module to realize a two-stage focusing function.

[0041] Reference numerals:

[0042] 100, driving module; 110, housing; 111, upper cover; 1111, upper substrate; 1112, extension portion; 112, base; 1121, lower substrate; 11211, through hole; 1122, surrounding edge; 11221, avoidance groove; 120, movable component; 121, lens holder; 1211, notch; 122, magnetic component; 1221, permanent magnet; 130, accommodating cavity; 140, first circuit board; 150, electromagnetic component; 151, electromagnet; 1511, magnetic core; 1512, coil;

[0043] 200, camera module; 210, lens assembly; 211, lens; 212, housing; 220, imaging assembly; 221, second circuit board; 2211, placement slot; 222, image sensor; 230, connector; 240, carrier board; 241, light hole; 250, filter; 260, first processor; 270, wire;

[0044] 300. Electronic device; 310. Second processor; 320. Power supply module. DETAILED DESCRIPTION

[0045] Camera modules can be used in electronic devices such as mobile phones, tablet computers, and laptops to enable these devices to realize digital photography and video recording functions. Camera modules are generally composed of lens components, drive modules, and image sensors. The lens components are composed of various optical lenses, and the drive module is used to drive the lens components to move relative to the image sensor, thereby adjusting the distance between the lens components and the image sensor, changing the focal length of the camera module, and realizing a variety of focus modes such as telephoto and macro.

[0046] An existing spring-type driving module includes an elastic component, a lens holder and a permanent magnet arranged in a housing, a coil is sleeved on the periphery of the lens holder, the permanent magnet can be arranged at intervals on the periphery of the lens holder, and the center of the lens holder is used to fix the lens. The elastic component includes an upper spring and a lower spring, both of which are annular structures, the outer ring parts of the upper spring and the lower spring are fixed on the housing, and the inner ring parts of the upper spring and the lower spring are connected to the top and the bottom of the lens holder respectively.

[0047] The principle of this type of driving module is as follows: the coil can generate a magnetic field when energized, and the interaction between the magnetic field and the permanent magnetic field of the permanent magnet can drive the coil to move. Driven by the coil and through the elastic force of the upper and lower springs, the lens holder and the lens assembly can be controlled to move along the optical axis of the camera module. By adjusting the current in the coil, the moving distance of the lens holder and the lens assembly can be controlled, thereby realizing the autofocus function. After the coil is powered off, the lens holder and the lens assembly can be reset under the elastic force of the upper and lower springs.

[0048] The area between the outer ring part and the inner ring part of the upper and lower spring plates of the existing driving module is a hollow structure composed of connecting ribs, which has relatively large elasticity. The upper and lower spring plates are easily affected by external forces and vibrate. For example, the shaking of the user's arms during shooting or the movement of the user's body when taking a picture will cause the electronic device to vibrate, thereby affecting the accuracy of the camera module's autofocus.

[0049] Therefore, in response to the problem that the shrapnel-type driving module in the existing camera module is prone to vibration under the action of external force, the present application provides a camera module and an electronic device, wherein the lens holder and the magnetic component in the camera module are arranged inside the shell of the driving module, and the magnetic component is arranged on the periphery of the lens holder, the center of the lens holder is used to fix the lens assembly, the first circuit board is arranged on the outside of the shell, and an electromagnetic component is arranged on the side of the first circuit board facing the shell, one end of the electromagnetic component is opposite to the magnetic pole of the magnetic component, and the magnetic pole direction of the magnetic field generated by the electromagnetic component can be changed by changing the direction of the current in the electromagnetic component, and the magnetic attraction and magnetic repulsion between the electromagnetic component and the magnetic component can drive the lens holder and the lens assembly to move in the shell along the optical axis direction of the camera module. Compared with the existing shrapnel-type driving module, the structure is more stable and less prone to vibration.

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0052] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0053] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In the description of the present application, it should be understood that the terms "inside", "outside", "side", "top", "bottom", "front", "back", etc., indicating orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] In the description of this application, it should be noted that the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0057] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0058] The driving module 100 provided in the embodiment of the present application is applied to the camera module 200 of the electronic device 300, wherein the electronic device 300 may be a device with a camera function such as a mobile phone, a camera, a tablet computer, a wearable device, etc. Figure 1 The structural schematic diagram of the electronic device 300 shown in the figure includes the camera module 200 and the second processor 310 provided in the embodiment of the present application, and the second processor 310 is connected to the camera module 200.

[0059] Exemplarily, the second processor 310 may include one or more processing units, for example: the second processor 310 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a memory, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and / or a neural-network processing unit (neural-network processing unit, NPU), etc. Among them, different processing units can be independent devices or integrated in one or more processors. Among them, the controller can be the nerve center and command center of the electronic device 300, and the controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of fetching and executing instructions.

[0060] Furthermore, the electronic device 300 further includes a power supply module 320, which is connected to the second processor 310 and the camera module 200, and is used to supply power to the camera module 200 and the second processor 310. The second processor 310 can control the power supply current direction and power supply state of the power supply module 320 to the camera module 200, and the power supply state includes a power-off state and a power-on state. Exemplarily, the power supply module 320 can be a battery.

[0061] The second processor 310 in the electronic device 300 can detect the user's switching operation on the focus mode of the lens assembly 210 in the camera module 200, and after determining the current focus mode according to the switching operation, send a corresponding control instruction to the camera module 200, so that the camera module 200 can realize the two-stage focus function. Figures 2 to 11 The specific structures of the camera module 200 and the driving module 100 provided in the embodiment of the present application are described in detail.

[0062] The structural diagram of the camera module 200 provided in the embodiment of the present application is as follows Figure 2 and Figure 3 As shown, Figure 2 is a schematic diagram of the overall structure of the camera module 200 provided in an embodiment of the present application, Figure 3 yes Figure 2 The exploded structural diagram of the camera module 200 is shown. In a possible implementation, the camera module 200 provided in the present application includes: a lens assembly 210, a driving module 100 and an imaging assembly 220.

[0063] The driving module 100 is a hollow structure, and the lens assembly 210 is disposed in the hollow structure of the driving module 100, and the imaging assembly 220 is stacked and disposed outside the driving module 100. The lens assembly 210 and the imaging assembly 220 are coaxial, and the lens assembly 210 and the imaging assembly 220 are disposed relatively on the optical axis path of the camera module 200. The driving module 100 is used to adjust the relative distance between the lens assembly 210 and the imaging assembly 220, and thus adjust the focal length of the driving module 100.

[0064] like Figure 3 As shown in , the lens assembly 210 in the camera module 200 includes a lens 211 and a housing 212. The lens 211 is a transparent optical component composed of one or more curved optical glasses, and the material of the lens 211 can be a plastic lens or a glass lens. The housing 212 can be used to protect the optical components in the lens. A through fixing hole is provided at the center of the housing 212, and the lens 211 is fixedly arranged in the fixing hole, so that external light can be incident from one end of the fixing hole to the light incident end of the lens 211, and then emitted from the lens assembly 210 from the other end of the fixing hole through the light exit end of the lens 211.

[0065] Exemplarily, the lens 211 in the lens assembly 210 may be a telephoto lens or a short-focus lens.

[0066] In the embodiment of the present application, the imaging component 220 includes a second circuit board 221 and an image sensor 222. The second circuit board 221 is a substrate of the camera module 200. Figure 2 and Figure 3As shown, a placement groove 2211 is provided on the side of the second circuit board 221 facing the lens assembly 210, and the image sensor 222 is arranged in the placement groove 2211. The photosensitive surface of the image sensor 222 is opposite to the lens assembly 210, and the image sensor 222 is coaxial with the lens assembly 210 and is arranged relatively along the optical axis direction of the camera module 200. The image sensor 222 can convert the received light signal incident through the lens assembly 210 into an electrical signal.

[0067] As an example but not limitation, the second circuit board 221 can be composed of a printed circuit board (PCB) or a flexible printed circuit (FPC). The image sensor 222 includes a photosensitive chip, which can be a charge coupled device (CCD) chip or a complementary metal oxide semiconductor (CMOS) chip.

[0068] The second circuit board 221 is also provided with a connector 230, and the connector 230 is electrically connected to the image sensor 222 through the second circuit board 221. When the camera module 200 is set in the electronic device 300, the connector 230 on the second circuit board 221 can be connected to the second processor 310 and the power supply module 320 in the electronic device 300, and the second circuit board 221 and the image sensor 222 of the camera module 200 can be powered by the connector 230, and information can be transmitted between the second circuit board 221 and the image sensor 222. Specifically, external light can enter the camera module 200 through the lens assembly 210, and the image sensor 222 can convert the received light signal incident through the lens assembly 210 into an electrical signal, and convert the electrical signal into image information, and the image information can be transmitted to the main processor of the electronic device 300 for processing through the second circuit board 221 and the connector 230.

[0069] Exemplarily, the connector 230 may be a USB data transmission controller. The connector 230 can implement a USB data transmission mode, which can realize time-sharing data transmission, transmitting different data in different time periods, thereby making data transmission fast. Meanwhile, the USB transmission mode has fewer pins and a large data transmission volume, thereby miniaturizing the camera module 200 and improving the data transmission performance of the camera module 200.

[0070] Furthermore, the camera module 200 also includes a carrier plate 240 and a filter 250. Figure 3As shown, the carrier plate 240 is disposed between the driving module 100 and the second circuit board 221. Specifically, the carrier plate 240 is fixedly disposed on the top of the second circuit board 221, the driving module 100 is fixedly disposed on the top of the carrier plate 240, a light through hole 241 is disposed on the carrier plate 240, and the light through hole 241 is communicated with the hollow structure of the driving module 100, and the filter 250 is fixedly disposed at the light through hole 241, so that the filter 250, the lens assembly 210, and the image sensor 222 are disposed opposite to each other along the optical axis direction of the lens assembly 210.

[0071] Optionally, the light-through hole 241 provided on the carrier plate 240 is a step-shaped through hole, which includes a large hole, a step surface and a small hole, the large hole is connected to the small hole, the large hole is located at the top of the small hole, the filter 250 is located in the large hole, and the bottom of the filter 250 is fixedly connected to the step surface. Exemplarily, the bottom of the filter 250 can be fixed on the step surface by adhesive.

[0072] After being emitted through the lens assembly 210, the external light first enters the filter 250. The filter 250 can filter out specific light, such as ultraviolet light and infrared light that are not easily observed by the human eye, and reduce stray light. The light filtered by the filter 250 can be incident on the image sensor 222. The filtering characteristics of the filter 250 also play a vital role in the imaging effect of the camera module 200.

[0073] As an example but not limitation, the filter 250 may be an infrared cutoff filter, a red filter, a blue filter, a green filter, or the like.

[0074] The structure diagram of the driving module 100 provided in the embodiment of the present application is as follows Figure 4 and Figure 5 As shown, Figure 4 The overall structural diagram of the driving module 100 provided in the embodiment of the present application is as follows: Figure 5 Schematic diagram of the exploded structure of the driving module 100 provided in the embodiment of the present application. The driving module 100 includes a housing 110, a movable component 120, a first circuit board 140 and an electromagnetic component 150. The movable component 120 is movably arranged in the accommodating cavity 130 of the housing 110, the first circuit board 140 is fixed to the outside of the housing 110, and the electromagnetic component 150 is arranged on the side of the first circuit board 140 facing the housing 110.

[0075] The movable component 120 includes a lens holder 121 and a magnetic component 122, wherein the magnetic component 122 is fixed to the periphery of the lens holder 121, and one magnetic pole of the magnetic component 122 is arranged opposite to one end of the electromagnetic component 150. The lens holder 121, the housing 110 and the first circuit board 140 are all hollow structures, and the lens component 210 is disposed in the hollow structures of the lens holder 121, the housing 110 and the first circuit board 140, and the lens component 210 is fixed in the hollow structure of the lens holder 121.

[0076] The first circuit board 140 is electrically connected to the electromagnetic assembly 150. The magnetic pole direction of the electromagnetic assembly 150 can change with the change of the direction of the current input to the first circuit board 140 and the electromagnetic assembly 150. The magnetic force between the electromagnetic assembly 150 and the magnetic assembly 122 will also change accordingly. Through the magnetic force between the electromagnetic assembly 150 and the magnetic assembly 122, the magnetic assembly 122 can drive the lens holder 121 to move in the accommodating cavity 130 along the optical axis direction of the lens assembly 210. During the movement of the lens holder 121, the lens assembly 210 also moves along the optical axis direction.

[0077] like Figure 5 As shown, the housing 110 of the driving module 100 includes a base 112 and an upper cover 111. The upper cover 111 includes an upper substrate 1111 and an extension portion 1112 arranged at the edge of the upper substrate 1111 and extending toward the base 112. The base 112 includes a lower substrate 1121 and a surrounding edge 1122 arranged at the edge of the lower substrate 1121 and extending toward the upper cover 111. When the upper cover 111 is covered on the base 112, a receiving cavity 130 of the driving module 100 can be formed, and the inner side wall of the extension portion 1112 abuts against the outer side wall of the surrounding edge 1122. A hollow structure matching the shape of the lens assembly 210 is provided in the center of the upper substrate 1111 and the lower substrate 1121. For example, if the shape of the lens assembly 210 is cylindrical, the shapes of the hollow structures of the upper substrate 1111 and the lower substrate 1121 are also circular.

[0078] It should be noted that the inner sidewalls of the components in the driving module 100 described in the embodiment of the present application are the sides of the components facing the accommodating cavity 130 , and the outer sidewalls of the components are the sides of the components facing away from the accommodating cavity 130 .

[0079] Furthermore, at least two extensions 1112 may be evenly and spaced apart at the edge of the upper substrate 1111, and a relief groove 11221 corresponding to each extension 1112 may be provided on the outer wall of the peripheral edge 1122. When the upper cover 111 is covered on the base 112, the extensions 1112 in the upper cover 111 may be inserted into the relief groove 11221 corresponding to the base 112, thereby improving the firmness of the upper cover 111 covering the base 112. For example, Figure 5 As shown, assuming that the upper substrate 1111 and the lower substrate 1121 are both square in shape, the surrounding edges 1122 can be distributed in a square shape, an extension portion 1112 is provided in each direction of the edge of the upper substrate 1111, and there is a certain interval between two adjacent extension portions 1112.

[0080] like Figure 4 As shown, the lens holder 121 and the magnetic assembly 122 are arranged in the accommodating chamber 130, and the lens holder 121 and the magnetic assembly 122 can move along the height direction of the accommodating chamber 130, wherein the height of the accommodating chamber 130 is the distance between the inner side wall of the upper substrate 1111 and the inner side wall of the lower substrate 1121 when the upper cover 111 is covered on the base 112. A hollow structure matching the shape and size of the housing 212 of the lens assembly 210 is provided in the center of the lens holder 121, and the lens assembly 210 can be inserted into the hollow structure of the upper cover 111, the lens holder 121 and the base 112, and the lens assembly 210 is fixedly connected to the lens holder 121.

[0081] As an example but not limitation, the shape of the lens holder 121 can be square, rectangular, circular or other irregular shapes, and the hollow structure opened in the center of the lens holder 121 can be a through hole in a square, rectangular, circular or other irregular shape. As an example but not limitation, if the shape of the housing 212 of the lens assembly 210 is cylindrical, then correspondingly, the hollow structures located in the middle of the upper cover 111, the middle of the lens holder 121 and the middle of the base 112 can all be circular through holes. In the embodiment of the present application, no limitation is imposed on the shape of the housing 212 of the lens assembly 210, the shape of the lens holder 121 and the shape of the hollow structures of the upper cover 111, the lens holder 121 and the base 112.

[0082] In the embodiment of the present application, the height of the accommodating cavity 130 is the distance between the inner wall of the upper substrate 1111 and the inner wall of the lower substrate 1121 when the upper cover 111 is covered on the base 112. Therefore, the height of the accommodating cavity 130 is related to the height of the extension portion 1112 of the upper cover 111 and the height of the surrounding edge 1122 of the base 112.

[0083] In one example, see Figure 4In the overall structural diagram of the driving module 100 shown in FIG. 1 , the height of the accommodating cavity 130 depends on the height of the surrounding edge 1122. Specifically, the height of the extension portion 1112 may be less than or equal to the height of the surrounding edge 1122. Then, when the upper cover 111 is covered on the base 112, the top of the surrounding edge 1122 abuts against the inner side wall of the upper substrate 1111, and the height of the accommodating cavity 130 of the housing 110 is equal to the height between the top of the surrounding edge 1122 and the inner side wall of the lower substrate 1121. Further, in this example, the height of the avoidance groove 11221 provided on the outer side wall of the surrounding edge 1122 may be greater than the height of the surrounding edge 1122. Then, when the extension portion 1112 is clamped in the avoidance groove 11221 of the surrounding edge 1122, there is a certain gap between the end of the extension portion 1112 away from the upper substrate 1111 and the first circuit board 140 provided at the bottom of the lower substrate 1121. The height of the avoidance groove 11221 opened on the outer wall of the surrounding edge 1122 can also be equal to the height of the surrounding edge 1122. When the extension part 1112 is clamped in the avoidance groove 11221 of the surrounding edge 1122, the end of the extension part 1112 away from the upper substrate 1111 abuts against the bottom of the avoidance groove 11221.

[0084] In other examples, the height of the accommodating cavity 130 depends on the height of the extension 1112. Specifically, the height of the extension 1112 may be greater than the height of the peripheral edge 1122, and the height of the avoidance groove 11221 provided on the outer side wall of the peripheral edge 1122 is equal to the height of the peripheral edge 1122. Then, when the upper cover 111 is covered on the base 112, the end of the extension 1112 away from the upper substrate 1111 abuts against the first circuit board 140 provided at the bottom of the lower substrate 1121, and there is a certain gap between the top of the peripheral edge 1122 and the inner side wall of the upper substrate 1111. The height of the accommodating cavity 130 of the housing 110 is equal to the height from the inner side wall of the lower substrate 1121 to the inner side wall of the upper substrate 1111.

[0085] In one example, the lens assembly 210 and the lens bracket 121 can be screwed together by threads, such as Figure 3 As shown, the outer wall of the housing 212 in the lens assembly 210 and the inner ring side wall of the lens holder 121 are both provided with threads, and the lens assembly 210 can be fixedly connected by threads. In another example, the lens assembly 210 and the lens holder 121 can also be fixedly connected by bonding, welding, etc.

[0086] In the embodiment of the present application, the magnetic assembly 122 includes at least two permanent magnets 1221. The permanent magnets 1221 in the magnetic assembly 122 are evenly distributed around the periphery of the lens holder 121 and are fixedly connected to the outer side wall of the lens holder 121. Exemplarily, the side wall of the permanent magnet 1221 can be fixedly connected to the outer side wall of the lens holder 121 by bonding.

[0087] For further information, see Figure 3 The exploded structure diagram of the camera module 200 is shown in FIG. Figure 5 The exploded structural schematic diagram of the driving module 100 shown in the figure, a notch 1211 corresponding to the multiple permanent magnets 1221 in the magnetic assembly 122 is set on the lens bracket 121, the size and shape of the notch 1211 match the size and shape of the permanent magnet 1221, the permanent magnet 1221 can be fixedly set in the notch 1211, the permanent magnet 1221 includes two magnetic poles, the two magnetic poles are N level and S level respectively, one of the magnetic poles is opposite to the upper substrate 1111 of the upper cover 111, and the other magnetic pole is opposite to the lower substrate 1121 of the base 112.

[0088] By way of example and not limitation, see Figure 5 The exploded structural diagram of the driving module 100 shown in the figure assumes that the shape of the lens holder 121 is rectangular, and the magnetic component 122 includes four permanent magnets 1221. Then, a notch 1211 can be opened at each of the four corners of the lens holder 121, and each permanent magnet 1221 can be fixed in the notch 1211, so that the outer wall of the permanent magnet 1221 is flush with the outer wall of the lens holder 121, wherein the outer wall of the permanent magnet 1221 is the side wall of the surrounding edge 1122 of the permanent magnet 1221 facing the base 112, and the outer wall of the lens holder 121 is the side wall of the surrounding edge 1122 of the lens holder 121 facing the base 112.

[0089] In the camera module 200 provided in the embodiment of the present application, the first circuit board 140 in the driving module 100 is arranged between the base 112 and the carrier plate 240, and the first circuit board 140 is fixedly arranged on the side of the carrier plate 240 facing away from the second circuit board 221. A hollow structure is provided in the center of the first circuit board 140, and the hollow structure of the first circuit board 140 is connected to the hollow structures of the upper cover 111, the lens bracket 121, and the base 112. The filter 250 arranged on the carrier plate 240 is opposite to the hollow structure of the first circuit board 140, so that external light can be incident on the filter 250 through the lens assembly 210 penetrating the hollow structure. The electromagnetic assembly 150 is arranged on the side of the first circuit board 140 facing the base 112, and the electromagnetic assembly 150 includes a plurality of electromagnets 151. The electromagnets 151 in the electromagnetic assembly 150 correspond one-to-one to the permanent magnets 1221 in the magnetic assembly 122, and the top of the electromagnet 151 is arranged opposite to the bottom of the permanent magnet 1221.

[0090] The electromagnet 151 includes a magnetic core 1511 and a coil 1512 disposed on the periphery of the magnetic core 1511. One end of the magnetic core 1511 is fixedly connected to the first circuit board 140, and the other end is opposite to the bottom of the base 112. The coil 1512 of each electromagnet 151 in the electromagnetic assembly 150 is electrically connected to the first circuit board 140, and the first circuit board 140 can be electrically connected to the second circuit board 221. When the connector 230 on the second circuit board 221 is connected to the power supply module 320 of the electronic device 300, the first circuit board 140, the second circuit board 221, and the coil 1512 of each electromagnet 151 on the first circuit board 140 can be powered by the connector 230.

[0091] For further reference, Figure 3 A first processor 260 may also be provided on the second circuit board 221. The first processor 260 may be connected to the first circuit board 140 via two wires 270, wherein one wire 270 serves as a current input wire and the other wire 270 serves as a current output wire. The two ports of the coil 1512 of the electromagnet 151 are connected to the two wires 270 in a one-to-one correspondence via the first circuit board 140.

[0092] The first processor 260 can be connected to the second processor 310 in the electronic device 300 through the second circuit board 221 and the connector 230. The first processor 260 can detect whether the user switches the focus mode in the lens assembly 210 through the second processor 310, and control the direction of the current output from the second circuit board 221 to the first circuit board 140 based on the switched focus mode, thereby controlling the direction of the current of each electromagnet 151 on the first circuit board 140.

[0093] It should be noted that the coil 1512 of the electromagnet 151 can generate a magnetic field when it is powered on. The direction of the magnetic pole of the magnetic field can be changed by changing the direction of the current in the coil 1512, and the magnitude of the magnetic field can be changed by changing the magnitude of the current flowing through the coil 1512. When the coil 1512 is powered on, one magnetic pole of the magnetic field generated by the electromagnet 151 is opposite to the magnetic pole at the bottom of the permanent magnet 1221, so that an interaction force is generated between the electromagnet 151 and the permanent magnet 1221. When the coil 1512 is powered off, the magnetic field of the electromagnet 151 also disappears.

[0094] Specifically, if the first processor 260 detects that the focus mode of the lens assembly 210 is switched from the first focus mode to the second focus mode, the first processor 260 controls the input of a first direction of power-on current to the first circuit board 140, and the magnetic component 122 drives the lens holder 121 and the lens assembly 210 to move parallel to the first distance from the bottom of the housing 110 to the direction away from the electromagnetic component 150 under the magnetic repulsion of the electromagnetic component 150, and then the top of the magnetic component 122 abuts against the top of the housing 110. If the first processor 260 detects that the focus mode of the lens assembly 210 is switched from the second focus mode to the first focus mode, the first processor 260 controls the input of a second direction of power-on current to the first circuit board 140, and the magnetic component 122 drives the lens holder 121 and the lens assembly 210 to move parallel to the first distance from the top of the housing 110 to the direction close to the electromagnetic component 150 under the magnetic attraction of the electromagnetic component 150, and then the bottom of the magnetic component 122 abuts against the bottom of the housing 110, and the first direction is opposite to the second direction.

[0095] Exemplarily, the first focus mode may be a telephoto mode, and the second focus mode may be a macro mode. When the lens assembly 210 is in the telephoto mode, the lens 211 of the lens assembly 210 focuses on infinity, and the distance between the lens 211 and the image sensor 222 in the camera module 200 is greater than the distance between the lens 211 and the image sensor 222 in the camera module 200 when the lens assembly 210 is in the macro mode.

[0096] As an example but not limitation, the first processor 260 may include one or more processing units, for example: the first processor 260 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a memory, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and / or a neural-network processing unit (neural-network processing unit, NPU), etc. Among them, different processing units can be independent devices or integrated in one or more processors. Among them, the controller in the first processor 260 can be the nerve center and command center of the camera module 200. The controller can generate an operation control signal according to the instruction opcode and the timing signal to complete the control of fetching and executing instructions.

[0097] For some possible designs, see Figure 5The exploded structural schematic diagram of the driving module 100 is shown, and a through hole 11211 corresponding to each electromagnet 151 in the electromagnetic assembly 150 is provided on the lower substrate 1121 of the base 112 of the shell 110. When the shell 110 is stacked on the first circuit board 140, the top surface of the first circuit board 140 facing the shell 110 can be abutted against the bottom surface of the lower substrate 1121, and the top end of each electromagnet 151 is opposite to the bottom end of the corresponding permanent magnet 1221 through the corresponding through hole 11211.

[0098] By way of example and not limitation, Figure 5 As shown, the lens holder 121, the shell 110 and the first circuit board 140 are all square in shape, the magnetic component 122 includes four permanent magnets 1221, and the four permanent magnets 1221 are distributed at the four corners of the lens holder 121, then a through hole 11211 can be opened at each of the four corners of the lower substrate 1121 of the shell 110, and the electromagnetic component 150 includes four electromagnets 151, and the settings of the four electromagnets 151 on the first circuit board 140 correspond one-to-one to the positions of the four permanent magnets 1221.

[0099] In some embodiments, the electromagnet 151 can be embedded in the first circuit board 140 so that the top of the magnetic core 1511 of the electromagnet 151 is located on the same horizontal plane as the side of the first circuit board 140 facing the shell 110. Then, the height of the permanent magnet 1221 can be greater than the height of the lens holder 121, so that when the movable component 120 moves to the bottom of the accommodating cavity 130 based on the magnetic attraction between the magnetic component 122 and the electromagnetic component 150, the bottom of the lens holder 121 abuts against the inner wall of the lower substrate 1121 of the base 112, and the magnetic pole at the bottom of each permanent magnet 1221 can pass through the through hole 11211 and abut against the top of the corresponding electromagnet 151, so that each permanent magnet 1221 is in full contact with the top of the magnetic core 1511 of the corresponding electromagnet 151, which can improve the stability of the connection between the magnetic component 122 and the electromagnetic component 150, thereby keeping the lens holder 121 and the lens assembly 210 in the telephoto position.

[0100] In some embodiments, Figure 5 As shown, the electromagnet 151 can be convexly arranged on the side of the first circuit board 140 facing the housing 110, and the electromagnet 151 can be inserted into the corresponding through hole 11211, so that when the movable component 120 moves to the bottom of the accommodating cavity 130 based on the magnetic attraction between the magnetic component 122 and the electromagnetic component 150, the magnetic pole at the bottom of each permanent magnet 1221 abuts against the top of the electromagnet 151 inserted into the corresponding through hole 11211. Figure 5As shown, the height of each permanent magnet 1221 can be greater than the height of the lens holder 121, so that when the magnetic pole at the bottom of the permanent magnet 1221 abuts against the top of the electromagnet 151 penetrating the corresponding through hole 11211, there is a certain gap between the bottom of the lens holder 121 and the inner side wall of the lower substrate 1121 of the base 112. The height of each permanent magnet 1221 can also be equal to the height of the lens holder 121, so that when the magnetic pole at the bottom of the permanent magnet 1221 abuts against the top of the electromagnet 151 penetrating the corresponding through hole 11211, the bottom of the lens holder 121 abuts against the inner side wall of the lower substrate 1121 of the base 112.

[0101] Optionally, the heights of all permanent magnets 1221 in the magnetic assembly 122 are equal, and the magnetic poles of all permanent magnets 1221 facing the magnetic end of the electromagnet 151 are the same, and the magnetic poles of the magnetic end facing the upper substrate 1111 are also the same. The embodiment of the present application does not impose any limitation on the relative height between the permanent magnet 1221 and the lens holder 121, and the relative height between the electromagnet 151 and the first circuit board 140.

[0102] It should be noted that, in the lens assembly 210 provided in the embodiment of the present application, the direction and magnitude of the current flowing through each electromagnet 151 in the electromagnetic assembly 150 are the same, so that when the electromagnetic assembly 150 is energized, the magnitude of the interaction force between each electromagnet 151 and the corresponding permanent magnet 1221 is consistent, and all the permanent magnets 1221 in the magnetic assembly 122 are driven to move in the same direction at the same time.

[0103] In a possible design, the upper substrate 1111 of the upper cover 111 in the housing 110 can be made of soft magnetic material, and the extension 1112 of the upper cover 111 and the base 112 are made of non-magnetic material. If each electromagnet 151 in the electromagnetic assembly 150 generates a magnetic repulsion force with the corresponding permanent magnet 1221 when powered on, so that the magnetic assembly 122 drives the lens holder 121 and the lens assembly 210 to move away from the image sensor 222, when the top of the permanent magnet 1221 abuts against the inner side wall of the upper substrate 1111 of the upper cover 111, the power supply to the electromagnetic assembly 150 can be disconnected, and the magnetic attraction between the magnetic pole at the top of the permanent magnet 1221 and the upper substrate 1111 can keep the lens holder 121 and the lens assembly 210 in a near-focus position, which can save electricity. In addition, the extension 1112 and the base 112 supported by non-magnetic materials can avoid affecting the interaction force between the magnetic assembly 122 and the electromagnetic assembly 150. In addition, there should be a certain gap between the side wall of the permanent magnet 1221 and the inner wall of the peripheral edge 1122 of the base 112 to avoid wear between the permanent magnet 1221 and the peripheral edge 1122 during the movement of the permanent magnet 1221 along the optical axis.

[0104] For example, the material of the upper substrate 1111 may be a soft magnetic material such as an iron silicon alloy, a soft ferrite, etc. The material of the extension portion 1112 and the base 112 may be plastic.

[0105] In another possible design, the materials of the upper substrate 1111 and the extension 1112 of the upper cover 111 can both be soft magnetic materials. In order to avoid the interaction force between the magnetic component 122 and the extension 1112 made of soft magnetic material, which affects the parallel movement of the movable component 120 along the optical axis, the gap between the side wall of the permanent magnet 1221 and the inner side wall of the surrounding edge 1122 can be increased, so that each permanent magnet 1221 of the magnetic component 122 avoids generating magnetic attraction or magnetic repulsion with the extension 1112 located on the outer side wall of the surrounding edge 1122, or the orthographic projection of each extension 1112 on the surrounding edge 1122 can be made not to overlap with the orthographic projection of the adjacent permanent magnet 1221 on the surrounding edge, thereby avoiding the generation of magnetic attraction or magnetic repulsion when a partial area of ​​the extension 1112 is opposite to the permanent magnet 1221.

[0106] In the camera module 200 provided in the embodiment of the present application, the lens assembly 210, the lens holder 121 and the magnetic assembly 122 in the driving module 100 are all movers, and the imaging assembly 220, the connector 230, the carrier plate 240, the filter 250, and the first circuit board 140, the electromagnetic assembly 150 and the housing 110 in the driving module 100 are all stators. By changing the direction of the current flowing through each electromagnet 151 in the electromagnetic assembly 150, the direction of the magnetic field can be changed, so that through the interaction force between each electromagnet 151 and each corresponding permanent magnet 1221, each permanent magnet 1221 is driven to drive the lens holder 121 and the lens assembly 210 fixed on the lens holder 121 to move in the direction away from the permanent magnet 1221 or move in parallel in the direction close to the permanent magnet 1221 inside the housing 110, thereby realizing the two-stage switching of the far and near focal lengths.

[0107] Specifically, when the focus mode of the lens assembly 210 is switched from the telephoto mode to the macro mode, the first processor 260 inputs a first direction of power-on current to the first circuit board 140, and a magnetic repulsion force is generated between the magnetic component 122 and the electromagnetic component 150, so that the magnetic component 122 drives the lens holder 121 and the lens assembly 210 to move parallel to the bottom of the shell 110 for a first distance in a direction away from the electromagnetic component 150. Then, the top of the magnetic component 122 abuts against the top of the shell 110, the movable component 120 is located at the top of the accommodating cavity 130, and the distance between the lens assembly 210 and the image sensor 222 is the farthest. When the focus mode of the lens assembly 210 is switched from the macro mode to the telephoto mode, the first processor 260 inputs a current in a second direction opposite to the first direction to the first circuit board 140, and a magnetic repulsion force is generated between the magnetic component 122 and the electromagnetic component 150, so that the magnetic component 122 drives the lens holder 121 and the lens assembly 210 to move parallel to the first distance from the top of the shell 110 to the direction close to the electromagnetic component 150, and then the bottom of the magnetic component 122 abuts against the bottom of the shell 110, the movable component 120 is located at the bottom of the accommodating cavity 130, and the distance between the lens assembly 210 and the image sensor 222 is shortest.

[0108] Therefore, based on the focal length of the lens 211 in the lens assembly 210, it can be determined that the difference between the image distance when the lens assembly 210 is in the telephoto mode for shooting and the image distance when the lens assembly 210 is in the macro mode for shooting is equal to the first distance that the movable component 120 moves in parallel in the accommodating cavity 130 when the camera module 200 switches the focus mode, and the height difference between the accommodating cavity 130 in the shell 110 and the movable component 120 determines the size of the first distance. If L is used to represent the first distance that the movable component 120 moves in parallel in the shell accommodating cavity 130 when the camera module 200 switches the focus mode, then L can be expressed as the following formula:

[0109]

[0110] Wherein, f represents the focal length of the lens 211 of the lens assembly 210, u1 represents the object distance when the lens assembly 210 is in a near focus position, and u2 represents the object distance when the lens assembly 210 is in a far focus position, and u1 is much smaller than u2.

[0111] It should be noted that the height of the movable component 120 may be the height of the largest one of the lens holder 121 and the magnetic component 122. For example, the height of the magnetic component 122 may be greater than the height of the lens holder 121. Accordingly, the first distance L may be the height difference between the accommodating cavity 130 and the electromagnetic component 150. Under the condition that the focal length f of the lens 211 in the lens assembly 210 is fixed, the height difference should be the difference between the image distance when the camera module 200 is in the telephoto mode for taking pictures and the image distance when the camera module 200 is in the macro mode for taking pictures. Therefore, according to the different focal lengths f of the lenses 211 in different lens assemblies 210, the first distance that the movable component 120 moves in the accommodating cavity 130 along the optical axis direction when the lens assembly 210 switches the focus mode can be determined based on the above formula, and then the height of the accommodating cavity 130 of the matching housing 110 is set according to the maximum moving distance and the height of the movable component 120, so that the housing 110 with an adapted height can be set for different lens assemblies 210.

[0112] Compared with the existing spring-type drive module 100, the drive module 100 provided by the present application is that the movable component 120 moves in the accommodating cavity 130 of the housing 110 through the magnetic attraction or magnetic repulsion between the stacked electromagnetic components 150, and the magnetic component 122 and the lens bracket 121 are not easily shaken by external forces, thereby realizing a two-stage focusing function, and there is no need to reset the mover by the elastic force of the upper and lower springs. The drive module 100 without upper and lower springs is not easily disturbed by external forces to produce vibrations. At the same time, the drive module 100 provided by the present application has a simpler structure, which is conducive to reducing the size of the camera module 200 and is suitable for miniaturized electronic devices 300. In addition, after the electromagnetic component 150 is powered off, the lens component 210 can be kept in macro mode by the magnetic attraction between the magnetic component 122 and the upper substrate 1111, and the lens component 210 can be kept in telefocus mode by the magnetic attraction between the magnetic component 122 and the magnetic core 1511 in the electromagnetic component 150, which can save electricity.

[0113] See also Figure 1 In the structural diagram of the electronic device 300 shown in FIG. 1 , when the camera module 200 provided in the above embodiment is set in the electronic device 300, the second processor 310 in the electronic device 300 can be connected to the first processor 260 in the camera module 200 through the connector 230 and the second circuit board 221 in the camera module 200. The power supply module 320 is connected to the second processor 310 and the connector 230 in the camera module 200 to supply power to the camera module 200 and the second processor 310.

[0114] In the embodiment of the present application, the second processor 310 in the electronic device 300 can detect the user's switching operation on the focus mode of the lens assembly 210 in the camera module 200, and after determining the current focus mode according to the switching operation, control the direction of the power-on current passed into the first circuit board 140 through the first processor 260, thereby controlling the power-on current direction and the magnetic pole direction of all electromagnets 151 in the electromagnetic assembly 150 arranged on the first circuit board 140, so that a magnetic force is generated between the electromagnet 151 and the corresponding permanent magnet 1221, and the electromagnetic assembly 150 drives the lens holder 121 to move parallel to the top of the shell 110 or the bottom of the shell 110 along the optical axis direction of the lens assembly 210 in the accommodating cavity 130, thereby realizing a two-stage focusing function.

[0115] Reference below Figures 6 to 11 The assembly structure diagram of the driving module 100 and the lens assembly 210 is shown, and Fig.12 The flowchart shown in the figure provides an exemplary description of the specific process of the second processor 310 in the electronic device 300 provided in the embodiment of the present application controlling the lens assembly 210 in the camera module 200 to realize the two-stage focusing function.

[0116] like Fig.12 As shown, the method for the second processor 310 in the electronic device 300 to control the camera module 200 to implement the two-stage focusing function includes the following steps:

[0117] S1201 , the second processor 310 sends a control instruction to the first processor 260 in response to a user's instruction to switch a focus mode of the lens assembly 210 of the camera module 200 .

[0118] In one embodiment, the second processor 310 can detect a user's triggering operation on a focus mode switching control key set on the electronic device 300, and generate a focus mode switching instruction according to detecting the user's focus mode switching operation on the lens assembly 210. The focus mode switching control key can be a click control key, and the triggering operation can be a click operation. In other embodiments, the user's focus mode switching instruction on the lens assembly 210 of the camera module 200 can be a voice control instruction.

[0119] The focus modes of the lens assembly 210 include a macro mode and a telephoto mode. The user can switch the lens assembly 210 from the macro mode to the telephoto mode, or from the telephoto mode to the macro mode. The second processor 310 can generate different control instructions to the first processor 260 according to different focus mode switching instructions.

[0120] S1202, the first processor 260 controls the direction of the current flowing through the first circuit board 140 of the camera module 200 according to the control instruction.

[0121] Specifically, if the focus mode switching instruction is used to instruct the lens assembly 210 to switch from the macro mode to the telephoto mode, the second processor 310 may send a first instruction to the first processor 260, the first instruction being used to instruct the first processor 260 to input a first direction of power-on current to the first circuit board 140 and the electromagnetic assembly 150, so that a magnetic attraction is generated between the electromagnetic assembly 150 and the magnetic assembly 122. If the focus mode switching instruction is used to instruct the lens assembly 210 to switch from the telephoto mode to the macro mode, the second processor 310 may send a second instruction to the first processor 260, the second instruction being used to instruct the first processor 260 to input a second direction of power-on current to the first circuit board 140 and the electromagnetic assembly 150, the first direction being opposite to the second direction, so that a magnetic repulsion is generated between the electromagnetic assembly 150 and the magnetic assembly 122.

[0122] S1203, when the magnetic force generated between the electromagnetic component 150 of the camera module 200 and the magnetic component 122 of the camera module 200 changes with the change of the direction of the current, the magnetic component 122 drives the lens holder 121 of the camera module 200 to move parallel to the optical axis direction of the lens component 210 in the accommodating cavity 130 of the camera module 200.

[0123] Specifically, when the first processor 260 inputs a first direction of current to the first circuit board 140 and the electromagnetic assembly 150, a magnetic attraction is generated between the electromagnetic assembly 150 and the magnetic assembly 122, and the magnetic assembly 122 can drive the lens bracket 121 and the lens assembly 210 to move parallel to the direction close to the electromagnetic assembly 150 to the bottom of the housing 110. Figure 8 The I region shown in Fig. 9 When shown Figure 7 The AA cross-sectional view shows that the lens assembly 210 and the movable assembly 120 are located at the bottom of the shell 110. When the lens assembly 210 is in the telephoto mode, the magnetic assembly 122 and the lens bracket 121 are located at the bottom of the accommodating cavity 130 of the shell 110. The magnetic pole at the bottom of each permanent magnet 1221 in the magnetic assembly 122 abuts against the top of the magnetic core 1511 of the corresponding electromagnet 151 through the through hole 11211, and the distance between the lens assembly 210 and the image sensor 222 is minimized.

[0124] When the first processor 260 inputs a current in the second direction to the first circuit board 140 and the electromagnetic assembly 150, a magnetic repulsion force is generated between the electromagnetic assembly 150 and the magnetic assembly 122, and the magnetic assembly 122 can drive the lens bracket 121 and the lens assembly 210 to move parallel to the top of the housing 110 away from the electromagnetic assembly 150. Fig.10 The I region shown in Fig.11 When shown Figure 7AA cross-sectional view when the lens assembly 210 and the movable assembly 120 are located at the top of the shell 110. When the lens assembly 210 is in macro mode, the magnetic assembly 122 and the lens holder 121 are located at the top of the accommodating cavity 130 of the shell 110. The top end of each permanent magnet 1221 in the magnetic assembly 122 can abut against the inner wall of the upper substrate 1111 of the upper cover 111, and the distance between the lens assembly 210 and the imaging assembly 220 is the largest.

[0125] Optionally, the first processor 260 can also control the duration of the power-on current in the first direction and the second direction input to the first circuit board 140 and the electromagnetic assembly 150 according to the control instruction, so as to disconnect the power-on current input to the first circuit board 140 after the magnetic assembly 122, the lens holder 121 and the lens assembly 210 move to the top of the shell 110 and the bottom of the shell 110.

[0126] Specifically, when the magnetic component 122 and the lens holder 121 move to the top of the accommodating cavity 130 of the shell 110, after the first circuit board 140 is powered off, the magnetic component 122, the lens holder 121 and the lens assembly 210 can be fixed to the top of the accommodating cavity 130 of the shell 110 through the magnetic attraction between the magnetic pole at the top of the permanent magnet 1221 and the upper substrate 1111 of the upper cover 111, so that the lens assembly 210 of the electronic device 300 remains in macro mode.

[0127] When the magnetic component 122 and the lens holder 121 move to the bottom of the accommodating cavity 130 of the shell 110, after the first circuit board 140 is powered off, the magnetic component 122, the lens holder 121 and the lens assembly 210 can be fixed to the bottom of the accommodating cavity 130 of the shell 110 through the magnetic attraction force between the magnetic pole at the bottom of each permanent magnet 1221 in the magnetic component 122 and the magnetic core 1511 of the corresponding electromagnet 151, so that the lens assembly 210 of the electronic device 300 remains in the telefocus mode.

[0128] As an example but not a limitation, it is assumed that the magnetic pole end of the permanent magnet 1221 facing the upper cover 111 is the N pole, and the magnetic pole end facing the electromagnet 151 is the S pole. After the coil 1512 of each electromagnet 151 in the electromagnetic assembly 150 inputs a current in a first direction, the top magnetic pole of the magnetic core 1511 after magnetization can be the N pole. After the coil 1512 of each electromagnet 151 in the electromagnetic assembly 150 inputs a current in a second direction, the top magnetic pole of the magnetic core 1511 after magnetization can be the S pole. Figures 6 to 11 , the specific process of switching between two photographing modes of the electronic device 300 provided in the embodiment of the present application is exemplarily described.

[0129] like Figures 6 to 9As shown, if the lens assembly 210 is in the telephoto mode in the initial state and no current is passed through the electromagnet 151, the bottom end of each permanent magnet 1221 can abut against the top end of the corresponding electromagnet 151 through magnetic attraction, so as to fix the magnetic assembly 122 and the lens bracket 121 at the bottom of the housing 110 accommodating cavity 130. Figure 8 The I region shown in Fig. 9 When shown Figure 7 AA cross-sectional view when the middle lens assembly 210 and the movable assembly 120 are located at the bottom of the shell 110. When the camera module 200 is in the telephoto mode, the magnetic assembly 122 abuts against the electromagnetic assembly 150, and the distance between the lens assembly 210 and the image sensor 222 is the smallest. The magnetic assembly 122, the lens bracket 121 and the lens assembly 210 are located at the bottom of the accommodating cavity 130 of the shell 110.

[0130] If the user switches the focus mode of the lens assembly 210 from the telephoto mode to the macro mode, the second processor 310 of the electronic device 300 can send a second instruction to the first processor 260 in the camera module 200. The first processor 260 inputs a current of the same magnitude and a first direction to the coil 1512 of each electromagnet 151 in the electromagnetic assembly 150 according to the second instruction. The top magnetic pole of the magnetized magnetic core 1511 is the S pole and is the same as the magnetic pole of the permanent magnet 1221 facing the magnetic end of the electromagnet 151. At this time, a magnetic repulsion force is generated between each electromagnet 151 and the corresponding permanent magnet 1221. See Fig.10 In the area I shown in the figure, all the permanent magnets 1221 in the magnetic assembly 122 can move away from the electromagnet 151 under the action of the magnetic repulsion force, and at the same time drive the lens holder 121 and the lens assembly 210 to move parallel to the direction away from the base 112 along the optical axis to the top of the accommodating cavity 130, and the maximum moving distance of the magnetic assembly 122 and the lens assembly 210 in the shell 110 is L.

[0131] See also Fig.11 When shown Figure 7 In the AA cross-sectional view when the lens assembly 210 and the movable assembly 120 are located at the top of the housing 110, when the magnetic assembly 122 and the lens holder 121 move to the top of the accommodating cavity 130, the top of each permanent magnet 1221 in the magnetic assembly 122 can abut against the inner side wall of the upper substrate 1111 of the upper cover 111, and the lens assembly 210 is in the macro mode, and the distance between the lens assembly 210 and the imaging assembly 220 is the maximum. At this time, the input current to all the permanent magnets 1221 in the magnetic assembly 122 can be disconnected at the same time, and the magnetic assembly 122, the lens holder 121 and the lens assembly 210 can be fixed at the top of the accommodating cavity 130 through the magnetic attraction between the magnetic poles at the top of the permanent magnets 1221 and the upper substrate 1111 of the upper cover 111, so that the lens assembly 210 remains in the macro mode.

[0132] If the user switches the focus mode of the lens assembly 210 from the macro mode to the telephoto mode again, the second processor 310 of the electronic device 300 can send a first instruction to the first processor 260 in the camera module 200. The first processor 260 inputs a current of the same magnitude and in the second direction to the coil 1512 of each electromagnet 151 in the electromagnetic assembly 150 according to the first instruction. The top magnetic pole of the magnetic core 1511 after magnetization is the N pole and is opposite to the magnetic pole of the corresponding permanent magnet 1221 facing the magnetic end of the electromagnet 151. At this time, each electromagnet 151 is attracted to the corresponding permanent magnet 1221. The magnetic attraction between the electromagnet 151 and the corresponding permanent magnet 1221 can overcome the magnetic attraction between the magnetic end at the top of the permanent magnet 1221 and the upper substrate 1111, thereby driving the lens holder 121 and the lens assembly 210 to move along the optical axis in the direction close to the base 112 to the bottom of the accommodating cavity 130.

[0133] like Figure 8 and Fig. 9 As shown, when the magnetic assembly 122 and the lens holder 121 move to the bottom of the accommodating cavity 130, the magnetic pole at the bottom of each permanent magnet 1221 abuts against the top of the magnetic core 1511 of the corresponding electromagnet 151, and the distance between the lens assembly 210 and the image sensor 222 is minimized. At this time, the input current to all the permanent magnets 1221 in the magnetic assembly 122 can be disconnected at the same time, and the magnetic assembly 122, the lens holder 121 and the lens assembly 210 can be fixed at the top and bottom of the accommodating cavity 130 through the magnetic attraction between the magnetic pole at the bottom of each permanent magnet 1221 in the magnetic assembly 122 and the magnetic core 1511 of the corresponding electromagnet 151, so that the lens assembly 210 maintains the telephoto mode.

[0134] Based on the camera module 200 provided in the application embodiment, after detecting that the user switches the focus mode of the lens assembly 210, the second processor 310 in the electronic device 300 can control the magnetic force between the magnetic component 122 and the electromagnetic component 150 in the driving module 100 by controlling the current direction input to the electromagnetic component 150 in the driving module 100, so that the lens holder 121 and the lens assembly 210 are parallelly moved a first distance to the bottom of the shell 110 under the action of the magnetic attraction force generated between the electromagnetic component 150 and the magnetic component 122, or are parallelly moved a first distance to the top of the shell 110 under the action of the magnetic repulsion force generated between the electromagnetic component 150 and the magnetic component 122. That is, by changing the current direction of the electromagnetic component 150, the mover in the camera module 200 can be driven to move in the accommodating cavity 130 of the shell 110 along the optical axis direction of the lens assembly 210, thereby changing the distance between the lens assembly 210 and the image sensor 222, so that the electronic device 300 is in a telephoto mode or a macro mode, and two-stage automatic focusing is achieved.

[0135] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A camera module, characterized in that: include: A lens assembly (210), a first processor (260) and a driving module (100); The driving module (100) comprises: a housing (110), a lens bracket (121), a magnetic component (122), a first circuit board (140) and an electromagnetic component (150); The magnetic component (122) is fixed to the periphery of the lens bracket (121), and the magnetic component (122) and the lens bracket (121) are located in the accommodating cavity (130) of the housing (110); The first circuit board (140) is fixed to the outer side of the housing (110) facing away from the lens holder (121), the electromagnetic component (150) is fixed to the side of the first circuit board (140) facing the housing (110), and the first circuit board (140) is electrically connected to the electromagnetic component (150) and the first processor (260) respectively; The lens bracket (121), the housing (110) and the first circuit board (140) are all hollow structures, and the hollow structure is used to fix the lens assembly (210); If the first processor (260) detects that the focus mode of the lens assembly (210) is switched from the first focus mode to the second focus mode, the first processor (260) controls the input of a first direction of current to the first circuit board (140), and the magnetic assembly (122) drives the lens holder (121) and the lens assembly (210) to move parallel to the bottom of the housing (110) in a direction away from the electromagnetic assembly (150) by a first distance under the action of the magnetic repulsion force of the electromagnetic assembly (150), and then the top of the magnetic assembly (122) abuts against the top of the housing (110); If the first processor (260) detects that the focus mode of the lens assembly (210) is switched from the second focus mode to the first focus mode, the first processor (260) controls the input of a second direction of current to the first circuit board (140), and the magnetic component (122) drives the lens holder (121) and the lens assembly (210) to move parallel to the first distance from the top of the housing (110) to the direction close to the electromagnetic component (150) under the action of the magnetic attraction force of the electromagnetic component (150), and then the bottom of the magnetic component (122) abuts against the bottom of the housing (110), and the first direction is opposite to the second direction.

2. The camera module according to claim 1, characterized in that: The first distance is a height difference between the accommodating cavity (130) and the magnetic component (122); The first distance is expressed as: Wherein, L represents the first distance, f represents the focal length of the lens (211) of the lens assembly (210), u1 represents the focus object distance when the lens assembly (210) is in the second focus mode, and u2 represents the focus object distance when the lens assembly (210) is in the first focus mode.

3. The camera module according to claim 1 or 2, characterized in that: The magnetic component (122) comprises at least two permanent magnets (1221), and the at least two permanent magnets (1221) are symmetrically distributed on the periphery of the lens holder (121); The electromagnetic assembly (150) comprises at least two electromagnets (151), and the electromagnets (151) correspond one to one to the permanent magnets (1221); One magnetic pole end of the permanent magnet (1221) is arranged opposite to one end of the corresponding electromagnet (151).

4. The camera module according to claim 3, characterized in that: The housing (110) comprises: an upper cover (111); The upper cover (111) comprises: an upper substrate (1111) and an extension portion (1112) extending from an edge of the upper substrate (1111) in a direction toward the first circuit board (140); The upper substrate (1111) is a hollow structure, and the material of the upper substrate (1111) is a soft magnetic material.

5. The camera module according to claim 4, characterized in that: The extension portion (1112) is made of non-magnetic material.

6. The camera module according to claim 4 or 5, characterized in that: The housing (110) further comprises: a base (112), the upper cover (111) covering the base (112) and forming the accommodating cavity (130) with the base (112); The base (112) comprises: a lower substrate (1121) and a peripheral edge (1122) extending from the edge of the lower substrate (1121) toward the upper substrate (1111); The lower substrate (1121) is a hollow structure, and the first circuit board (140) is fixed on the side of the lower substrate (1121) facing away from the lens holder (121); The outer side wall of the surrounding edge (1122) is provided with an avoidance groove (11221) for engaging with the extension portion (1112).

7. The camera module according to claim 6, characterized in that: The lower substrate (1121) is provided with a through hole (11211) corresponding to each electromagnet (151); One end of the electromagnet (151) is opposite to a magnetic pole end of the corresponding permanent magnet (1221) through the through hole (11211), and the other magnetic pole end of the permanent magnet (1221) is opposite to the upper substrate (1111).

8. The camera module according to claim 7, characterized in that: The electromagnet (151) is located in the corresponding through hole (11211).

9. The camera module according to any one of claims 3 to 8, characterized in that: The edge of the lens support (121) is provided with notches (1211) corresponding one-to-one to the at least two permanent magnets (1221); The permanent magnet (1221) is fixed at the corresponding notch (1211).

10. The camera module according to claim 1, characterized in that: The first focus mode is a telephoto mode, and the second focus mode is a macro mode.

11. An electronic device, characterized in that: include: The camera module (200) as claimed in any one of claims 1 to 10.

12. An electronic device, characterized in that: include: A lens assembly (210), a driving module (100) and a second processor (310), wherein the driving module (100) is electrically connected to the second processor (310); The driving module (100) comprises: a housing (110), a lens bracket (121), a magnetic component (122), a first circuit board (140) and an electromagnetic component (150); The magnetic component (122) is fixed to the periphery of the lens bracket (121), and the magnetic component (122) and the lens bracket (121) are located in the accommodating cavity (130) of the housing (110); The first circuit board (140) is fixed on the outer side of the housing (110) facing away from the lens holder (121), the electromagnetic assembly (150) is fixed on the side of the first circuit board (140) facing the housing (110), and the first circuit board (140) is electrically connected to the electromagnetic assembly (150); The lens bracket (121), the housing (110) and the first circuit board (140) are all hollow structures, and the hollow structure is used to fix the lens assembly (210); If the second processor (310) detects that the focus mode of the lens assembly (210) is switched from the first focus mode to the second focus mode, the second processor (310) controls the input of a first direction of current to the first circuit board (140), and the magnetic component (122) drives the lens holder (121) and the lens assembly (210) to move parallel to the bottom of the housing (110) in a direction away from the electromagnetic component (150) by a first distance under the action of the magnetic repulsion force of the electromagnetic component (150), and then the top of the magnetic component (122) abuts against the top of the housing (110); If the second processor (310) detects that the focus mode of the lens assembly (210) is switched from the second focus mode to the first focus mode, the second processor (310) controls the input of a second direction of current to the first circuit board (140), and the magnetic component (122) drives the lens holder (121) and the lens assembly (210) to move parallel to the first distance from the top of the shell (110) to the direction close to the electromagnetic component (150) under the action of the magnetic attraction force of the electromagnetic component (150), and then the bottom of the magnetic component (122) abuts against the bottom of the shell (110), and the first direction is opposite to the second direction.

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