Camera module and electronic equipment

Abstract

The invention provides a camera module and electronic equipment, and relates to the technical field of cameras. The lens assembly is arranged in the shell; the driving assembly is arranged on the outer side of the lens assembly and used for driving the lens assembly to move in the optical axis direction of the lens assembly; and the capacitor assembly is used for measuring the displacement of the lens assembly along the optical axis direction. According to the scheme provided by the embodiment of the invention, the capacitor assembly is arranged as a component for measuring the displacement of the lens, so that the cost is low, the measurement accuracy is high, and the size of the camera module can be greatly reduced.

Description

Technical Field

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

[0002] Camera modules are widely used in various electronic devices. With the development of related technologies, camera modules can usually realize functions such as autofocus and optical image stabilization. The realization of the above functions all depends on the measurement of lens displacement.

[0003] In the related art, Hall devices are usually used to measure the displacement of the lens in the camera module. This measurement method has low accuracy and high cost, and because an additional Hall sensor device needs to be installed, it will also increase the size of the camera module. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a camera module and an electronic device.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a camera module, including:

[0006] case;

[0007] A lens assembly is arranged inside the housing;

[0008] A driving assembly, arranged outside the lens assembly, for driving the lens assembly to move along the optical axis direction of the lens assembly;

[0009] The capacitance component is used to measure the displacement of the lens component along the optical axis.

[0010] In some embodiments, the drive assembly includes:

[0011] A coil is wound around the outside of the lens assembly;

[0012] The first magnetic member is disposed on a side of the coil away from the lens assembly and is fixedly connected to the inner side of the housing;

[0013] The elastic member is arranged at both ends of the lens assembly and is used to connect the lens assembly and the first magnetic member.

[0014] In some embodiments, the capacitor assembly includes a first capacitor plate and a second capacitor plate, the first capacitor plate is fixed to a side of the coil close to the first magnetic member, and the second capacitor plate is fixed to a side of the first magnetic member close to the coil.

[0015] In some embodiments, the first capacitor plate is disposed in parallel with the second capacitor plate.

[0016] In some embodiments, projections of the first capacitor plate and the second capacitor plate on the first magnetic member at least partially overlap.

[0017] In some embodiments, when the lens assembly moves along the optical axis, the overlapping area of ​​the first capacitor plate and the second capacitor plate projected on the first magnetic member changes.

[0018] In some embodiments, the first capacitor plate includes a metal sheet, and the second capacitor plate includes a metal sheet and / or a second magnetic member.

[0019] According to a second aspect of an embodiment of the present disclosure, another camera module is provided, including:

[0020] case;

[0021] A lens assembly is arranged inside the housing;

[0022] A bottom plate, arranged in the optical axis direction of the lens assembly;

[0023] A driving assembly, arranged outside the lens assembly, for driving the lens assembly to move along the optical axis;

[0024] A supporting assembly, used for supporting the driving assembly on the base plate so that the driving assembly can move in a plane perpendicular to the optical axis direction;

[0025] The capacitance component is used to measure the displacement of the lens component in a plane perpendicular to the optical axis.

[0026] In some embodiments, the drive assembly includes:

[0027] A coil is wound around the outside of the lens assembly;

[0028] A first magnetic member is disposed on a side of the coil away from the lens assembly;

[0029] The elastic member is arranged at both ends of the lens assembly and is used to connect the lens assembly and the first magnetic member.

[0030] In some embodiments, the support assembly includes a suspension wire, one end of which is fixedly connected to the driving assembly, and the other end of which is fixedly connected to the base plate.

[0031] In some embodiments, the capacitor assembly includes multiple pairs of capacitor plates, and each pair of capacitor plates is used to measure the displacement of the lens assembly in different directions in a plane perpendicular to the optical axis.

[0032] In some embodiments, each pair of capacitor plates includes a first capacitor plate and a second capacitor plate, the first capacitor plate is fixed to a side of the bottom plate close to the driving component, and the second capacitor plate is fixed to a side of the driving component close to the bottom plate.

[0033] In some embodiments, the first capacitor plate is disposed in parallel with the second capacitor plate.

[0034] In some embodiments, projections of the first capacitor plate and the second capacitor plate on the bottom plate at least partially overlap.

[0035] In some embodiments, when the lens assembly moves in a plane perpendicular to the optical axis, an overlapping area of ​​a first capacitor plate and a second capacitor plate in at least one pair of capacitor plates projected onto the bottom plate changes.

[0036] In some embodiments, the first capacitor plate includes a metal sheet, and the second capacitor plate includes a metal sheet and / or a second magnetic member.

[0037] According to a third aspect of an embodiment of the present disclosure, an electronic device is provided, comprising a camera module as in the first aspect and / or a camera module as in the second aspect.

[0038] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0039] The camera module provided by the embodiment of the present disclosure can measure the displacement of the lens assembly along the optical axis through the capacitor assembly, thereby realizing the automatic focus of the camera module; the displacement of the lens assembly in a plane perpendicular to the optical axis can also be measured through the capacitor assembly, thereby realizing the optical image stabilization of the camera module. The solution provided by the embodiment of the present disclosure, by setting the capacitor assembly as a component for measuring the displacement of the lens, has low cost, high measurement accuracy, and can greatly reduce the volume of the camera module.

[0040] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of a camera module in an embodiment of the present disclosure is shown.

[0042] Figure 2 A schematic structural diagram of another camera module in an embodiment of the present disclosure is shown.

[0043] Figure 3 A schematic structural diagram of a capacitor assembly in an embodiment of the present disclosure is shown.

[0044] Figure 4 A schematic diagram showing the corresponding relationship of the capacitor plates in the embodiment of the present disclosure is shown.

[0045] Reference numerals:

[0046] 100-housing; 200-lens assembly; 300-driving assembly; 301-coil; 302-first magnetic component; 303-elastic component; 400-capacitor assembly; 401-first capacitor plate; 402-second capacitor plate; 500-filter; 600-photosensitive chip; 700-bottom plate; 800-support assembly. DETAILED DESCRIPTION

[0047] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0048] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0049] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0050] The present disclosure provides a camera module that realizes distance measurement through a capacitive component, which can be applied to terminal products such as smart phones, tablet computers, and vehicle-mounted monitoring.

[0051] The following will be combined with the attached Figures 1 to 3 , the camera module provided by the present invention is described in detail through specific embodiments and their application scenarios.

[0052] Figure 1 FIG. 2 is a schematic diagram showing the structure of a camera module in an embodiment of the present disclosure. Figure 1 As shown, the camera module provided by the embodiment of the present disclosure includes: a housing 100, a lens assembly 200, a drive assembly 300 and a capacitor assembly 400. Among them, the lens assembly 200 is arranged inside the housing 100, and may include a lens and a lens carrier for carrying the lens. The drive assembly 300 is arranged outside the lens assembly 200, and is used to drive the lens assembly 200 to move along the optical axis direction of the lens assembly 200. The capacitor assembly 400 is used to measure the displacement of the lens assembly 200 along the optical axis direction.

[0053] Exemplarily, the camera module further includes: a filter 500 and a photosensitive chip 600 arranged in sequence in the direction of the lens assembly 200 away from the object to be photographed. The filter 500 is used to filter the light passing through the lens. The photosensitive chip 600 is used to receive the light passing through the filter 500 and convert the optical signal into an electrical signal for imaging.

[0054] It should be noted that the optical axis refers to the central axis of the light when it passes through the lens, that is, a straight line passing through the center of the lens. The optical axis direction referred to in the embodiment of the present disclosure is the direction pointed by the straight line, including the directions pointed by both ends of the straight line.

[0055] That is to say, the lens assembly 200 can move towards the direction close to the photosensitive chip 600 or move away from the photosensitive chip 600 under the action of the driving assembly 300, thereby changing the focal length of the lens and achieving automatic focusing.

[0056] In some embodiments, the driving assembly 300 includes: a coil 301, a first magnetic member 302, and an elastic member 303. The coil 301 is wound around the outside of the lens assembly 200. The first magnetic member 302 is disposed on the side of the coil 301 away from the lens assembly 200, and is fixedly connected to the inner side of the housing 100. The elastic member 303 is disposed at both ends of the lens assembly 200, and is used to connect the lens assembly 200 and the first magnetic member 302. The two ends of the lens assembly 200 are used to indicate the end of the lens assembly 200 that is close to the subject and the end that is away from the subject.

[0057] Exemplarily, the first magnetic member 302 may be a magnet or other material capable of generating a magnetic field. The first magnetic member 302 may be disposed around the coil 301. The lens assembly 200 around which the coil 301 is disposed is supported in the first magnetic member 302 disposed around the coil by the elastic member 303, and a certain gap is provided between the lens assembly 200 and the first magnetic member 302, so that the lens assembly 200 has a certain degree of freedom of movement in the optical axis direction.

[0058] Exemplarily, the coil 301 may be wound around a lens carrier to achieve a fixed connection between the coil 301 and the lens assembly 200 .

[0059] The coil 301 can reciprocate along the optical axis direction of the lens assembly 200 under the action of the magnetic field provided by the first magnetic member 302. Since the coil 301 and the lens assembly 200 are fixedly connected, the reciprocating motion of the coil 301 can drive the lens assembly 200 to perform the same reciprocating motion, thereby changing the distance between the lens assembly 200 and the photosensitive chip 600, thereby achieving the focus of the camera module.

[0060] In some embodiments, the elastic member 303 may be a spring made of an elastic material (eg, metal, plastic, etc.) The elastic member 303 may be deformed under the influence of an external force, and eliminate the deformation caused by the external force through its own elasticity after the external force is eliminated.

[0061] Specifically, the elastic members 303 disposed at both ends of the lens assembly 200 can suspend the lens assembly 200 in the first magnetic member 302 disposed around it. The lens assembly 200 is deformed in the process of following the movement of the coil 301, and the movable limit position of the lens assembly 200 is limited. In other words, when the lens assembly 200 moves to the limit position in a certain direction, the electromagnetic force generated by the coil 301 under the action of the magnetic field and the elastic force provided by the elastic member 303 are balanced, so that the lens assembly 200 cannot continue to move in this direction. When the external electromagnetic force disappears, the shrapnel can drive the lens assembly 200 to return to its initial position.

[0062] In some embodiments, the capacitor assembly 400 includes: a first capacitor plate 401 and a second capacitor plate 402. The first capacitor plate 401 is fixed to a side of the coil 301 close to the first magnetic member 302, and the second capacitor plate 402 is fixed to a side of the first magnetic member 302 close to the coil 301. In other words, the first capacitor plate 401 and the second capacitor plate 402 are arranged relative to each other, so that a capacitor can be formed between the two.

[0063] When the lens assembly 200 moves along the optical axis, the first capacitor plate 401 can follow the coil 301 to move relative to the first magnetic member 302 , while the second capacitor plate 402 and the first magnetic member 302 remain relatively stationary.

[0064] Exemplarily, the first capacitor plate 401 and the second capacitor plate 402 may be connected to an external circuit board through wires, respectively, so that charges are generated in the capacitor formed by the first capacitor plate 401 and the second capacitor plate 402 .

[0065] When the elastic member 303 is a metal spring, the elastic member 303 may also replace the wire to provide an electrical connection path between the first capacitor plate 401 and / or the second capacitor plate 402 and the external circuit board.

[0066] In some embodiments, the projections of the first capacitor plate 401 and the second capacitor plate 402 on the first magnetic member 302 at least partially overlap. Thus, when the lens assembly 200 moves along the optical axis, the overlapping area of ​​the projections of the first capacitor plate 401 and the second capacitor plate 402 on the first magnetic member 302 (i.e., the facing area of ​​the first capacitor plate 401 and the second capacitor plate 402) changes. Based on the change in the overlapping area, the displacement of the lens assembly 200 can be calculated.

[0067] Specifically, according to the working characteristics of capacitors, the capacitance of capacitors Wherein, ε represents the dielectric constant of the medium; k represents the electrostatic force constant; S represents the facing area of ​​the first capacitor plate 401 and the second capacitor plate 402; and d represents the distance between the first capacitor plate 401 and the second capacitor plate 402.

[0068] In the camera module provided by the embodiment of the present disclosure, since the first capacitor plate 401 and the second capacitor plate 402 are arranged in parallel and both are kept parallel to the optical axis direction, when the lens assembly 200 follows the coil 301 to move along the optical axis direction, the distance d between the first capacitor plate 401 and the second capacitor plate 402 remains constant, while the facing area S between the first capacitor plate 401 and the second capacitor plate 402 changes.

[0069] When the distance d remains constant, the opposite area S can be calculated by measuring the capacitance C. Therefore, by measuring the change in capacitance C during the movement of the coil 301, the change in the opposite area S can be calculated, and then the distance moved by the first capacitor plate 401 along the optical axis direction can be derived according to the area calculation formula corresponding to the shape of the capacitor plate.

[0070] Since the first capacitor plate 401 is fixed on the coil 301, and the coil 301 is wound outside the lens assembly 200 (i.e., fixed to the lens assembly 200), no matter how the coil 301 moves, the first capacitor plate 401 and the lens assembly 200 are always relatively stationary. In other words, the distance that the first capacitor plate 401 moves along the optical axis can reflect the distance that the lens assembly 200 moves.

[0071] Based on the above derivation process, the displacement of the lens along the optical axis can be accurately measured by the capacitor component 400.

[0072] In some embodiments, the first capacitor plate 401 includes a metal sheet, and the second capacitor plate 402 includes a metal sheet and / or a second magnetic member (eg, a magnet or other material capable of generating a magnetic field).

[0073] It is worth noting that, since the second capacitor plate 402 is fixed on the first magnetic member 302, and the material of the second capacitor plate 402 can be the same as that of the first magnetic member 302, the second capacitor plate 402 can be the same magnetic member as the first magnetic member 302, provided that the positional relationship between the second capacitor plate 401 and the first capacitor plate 401 is satisfied. In other words, in the camera module provided in the embodiment of the present disclosure, the second capacitor plate 402 may not be additionally provided, but the displacement of the lens assembly 200 may be calculated by measuring the capacitance change between the first capacitor plate 401 and the first magnetic member 302, thereby further saving costs and simplifying the manufacturing process.

[0074] Therefore, the camera assembly provided by the embodiment of the present disclosure can accurately measure the displacement of the lens assembly along the optical axis through the capacitor assembly, thereby adjusting the distance between the photosensitive chip and the lens to achieve automatic focus. Since the capacitor assembly does not need to install additional Hall sensors or other types of sensors for control, the distance can be calculated by measuring the change in capacitance, thus avoiding the space occupied by installing additional sensors in the camera module, thereby reducing the size of the camera module, which is of great significance for small terminal devices that need to be equipped with camera modules.

[0075] Based on the same inventive concept, the present disclosure also provides another camera module, such as the following embodiment. The camera module can measure the displacement of the lens assembly in a plane perpendicular to the optical axis through a capacitor component, thereby achieving optical image stabilization. Since the principle of solving the problem in the camera module embodiment is similar to that in the above embodiment, the implementation of the camera module embodiment can refer to the implementation of the above embodiment, and the repeated parts will not be repeated.

[0076] Specifically, Figure 2 FIG. 2 shows a schematic diagram of the structure of another camera module in an embodiment of the present disclosure. Figure 2 As shown, the camera module provided by the embodiment of the present disclosure includes: a housing 100, a lens assembly 200, a base plate 700, a drive assembly 300, a support assembly 800 and a capacitor assembly 400. Among them, the lens assembly 200 is arranged inside the housing 100, and may include a lens and a lens carrier for carrying the lens. The base plate 700 is arranged in the optical axis direction of the lens assembly 200, and the base plate 700 is perpendicular to the optical axis direction and is fixedly connected to the inner surface of the housing 100. The drive assembly 300 is arranged outside the lens assembly 200, and is used to drive the lens assembly 200 to move along the optical axis direction. The support assembly 800 is used to support the drive assembly 300 on the base plate 700 so that the drive assembly 300 can move in a plane perpendicular to the optical axis direction. The capacitor assembly 400 is used to measure the displacement of the lens assembly 200 in the plane.

[0077] It is understandable that in Figure 2 In the illustrated embodiment, the driving assembly 300 is in a suspended state in the housing 100, that is, the supporting assembly 800 only supports the driving assembly 300, but cannot fix the driving assembly 300 in the housing 100. Therefore, under the action of external force, the driving assembly 300 can generate displacement in a plane perpendicular to the optical axis direction in the housing 100, thereby driving the lens assembly 200 to generate displacement in the same direction. In the embodiment of the present disclosure, by setting the capacitor assembly 400 to measure the displacement, optical image stabilization can be achieved through the algorithm in the relevant technology.

[0078] Exemplarily, the camera module further includes: a filter 500 and a photosensitive chip 600 arranged in sequence in the direction of the lens assembly 200 away from the object to be photographed. The filter 500 is used to filter the light passing through the lens. The photosensitive chip 600 is used to receive the light passing through the filter 500 and convert the optical signal into an electrical signal for imaging.

[0079] In some embodiments, the driving assembly 300 includes: a coil 301, a first magnetic member 302, and an elastic member 303. The coil 301 is wound around the outside of the lens assembly 200. The first magnetic member 302 is disposed on a side of the coil 301 away from the lens assembly 200. The elastic member 303 is disposed at both ends of the lens assembly 200, and is used to connect the lens assembly 200 and the first magnetic member 302.

[0080] As mentioned earlier, unlike Figure 1 In the embodiment shown, since the driving assembly 300 in the embodiment of the present disclosure is in a suspended state in the housing 100, the first magnetic member 302 is not fixedly connected to the housing 100, and there is a certain gap between them, so that the driving assembly 300 has a certain degree of freedom of movement. Figure 1 The description in the embodiments is for the sake of brevity, and the embodiments of the present disclosure will not be repeated here.

[0081] In some embodiments, the support assembly 800 includes a suspension wire, one end of which is fixedly connected to the driving assembly 300 , and the other end of which is fixedly connected to the base plate 700 .

[0082] The suspension wire may be a thread-like component made of elastic material (eg, metal, plastic, etc.). The elastic member 303 may be deformed under the influence of an external force, and eliminate the deformation caused by the external force through its own elasticity after the external force is eliminated.

[0083] Specifically, the suspension wire can suspend the driving assembly 300 in the housing 100. When the driving assembly 300 is displaced, it deforms and limits the movable limit position of the driving assembly 300. When the external force disappears, the suspension wire can drive the driving assembly 300 to return to its initial position.

[0084] It should be noted that one end of the suspension wire is fixed to the bottom plate 700, and the other end can be fixed to any position of the driving assembly 300. For example, the other end of the suspension wire can be fixedly connected to the elastic member 303 disposed at one end of the lens assembly 200 close to the photographed object, so that the suspension wire can provide sufficient degrees of freedom for the driving assembly 300 while ensuring structural stability.

[0085] because Figure 2The embodiment shown measures the displacement in a plane, and the displacement of the drive assembly 300 in the plane is uncertain, so it is necessary to measure the displacement in at least two directions to finally synthesize the total displacement of the actual movement of the drive assembly 300. The drive assembly 300 and the lens assembly 200 remain relatively still in a plane perpendicular to the optical axis direction, so the displacement of the drive assembly 300 in the plane perpendicular to the optical axis direction can be used to characterize the displacement of the lens assembly 200 in the plane, and then the corresponding calculation can be performed based on the displacement to achieve optical image stabilization of the camera module.

[0086] For example, Figure 2 The capacitor assembly 400 shown may include multiple pairs of capacitor plates, each pair of capacitor plates being used to measure the displacement of the lens assembly 200 in different directions within a plane.

[0087] In some embodiments, each pair of capacitor plates includes a first capacitor plate 401 and a second capacitor plate 402, wherein the first capacitor plate 401 is fixed to a side of the bottom plate 700 close to the driving component 300, and the second capacitor plate 402 is fixed to a side of the driving component 300 close to the bottom plate 700. That is, in each pair of capacitor plates, the first capacitor plate 401 and the second capacitor plate 402 are arranged opposite to each other, so that a capacitor can be formed therebetween.

[0088] Exemplarily, the second capacitor plate 402 may be fixed on the first magnetic member 302 , or may be fixed on a magnetic member carrier (not shown) for carrying the first magnetic member 302 , and this embodiment of the present disclosure is not limited to this.

[0089] When the driving assembly 300 moves along a plane perpendicular to the optical axis, the second capacitor plate 402 can move relative to the housing 100 following the driving assembly 300 , while the first capacitor plate 401 and the housing 100 remain relatively stationary.

[0090] Exemplarily, the first capacitor plate 401 and the second capacitor plate 402 may be connected to an external circuit board through wires, respectively, so that charges are generated in the capacitor formed by the first capacitor plate 401 and the second capacitor plate 402 .

[0091] When the support component 800 is a metal wire and the elastic member 303 is a metal spring, the metal wire connected to the elastic member 303 can also replace the wire to provide an electrical connection path between the first capacitor plate 401 and / or the second capacitor plate 402 and the external circuit board.

[0092] In some embodiments, the projections of the first capacitor plate 401 and the second capacitor plate 402 in each pair of capacitor plates on the bottom plate 700 at least partially overlap. Thus, when the driving assembly 300 moves in a plane perpendicular to the optical axis direction, the overlapping area of ​​the projections of the first capacitor plate 401 and the second capacitor plate 402 in at least one pair of capacitor plates on the bottom plate 700 (i.e., the area directly facing the first capacitor plate 401 and the second capacitor plate 402) changes. Based on the change in the overlapping area, the displacement generated by the driving assembly 300 can be calculated.

[0093] It should be noted that the principle of calculating displacement using a capacitor component can refer to the description in the previous embodiment, and the present embodiment will not be repeated here. Figure 2 In the illustrated embodiment, since the first capacitor plate 401 and the second capacitor plate 402 are arranged in parallel, and both are kept parallel to the plane perpendicular to the optical axis direction, when the driving assembly 300 moves in the plane perpendicular to the optical axis direction, the distance d between the first capacitor plate 401 and the second capacitor plate 402 remains constant, while the facing area S between the first capacitor plate 401 and the second capacitor plate 402 changes.

[0094] In some embodiments, the first capacitor plate 401 includes a metal sheet, and the second capacitor plate 402 includes a metal sheet and / or a second magnetic member (eg, a magnet or other material capable of generating a magnetic field).

[0095] It is worth noting that, since the second capacitor plate 402 can be fixed on the first magnetic member 302, and the material of the second capacitor plate 402 can be the same as that of the first magnetic member 302, the second capacitor plate 402 in each pair of capacitor plates can be the same magnetic member as the first magnetic member 302, provided that the positional relationship with the first capacitor plate 401 is satisfied. In other words, in the camera module provided in the embodiment of the present disclosure, the second capacitor plate 402 may not be additionally provided, but the displacement of the driving component 300 in different directions may be calculated by measuring the capacitance change between each first capacitor plate 401 and the first magnetic member 302, thereby further saving costs and simplifying the manufacturing process.

[0096] Therefore, the camera assembly provided in the embodiment of the present disclosure can also measure the displacement of the lens assembly in a plane perpendicular to the optical axis direction through a capacitor assembly, thereby being used for optical image stabilization calculation.

[0097] Understandably, Figure 1 and Figure 2 In the embodiments, the configuration of the capacitor components can be used in combination to simultaneously measure the displacement of the lens component in different directions, thereby simultaneously achieving autofocus and optical image stabilization, which is not limited in the present disclosure.

[0098] Figure 3A schematic diagram of the structure of a capacitor assembly is shown. The capacitor assembly can be applied to Figure 1 The camera module shown in the embodiment can also be applied to Figure 2 The camera module shown in the embodiment.

[0099] Specifically, the capacitor assembly 400 includes at least one pair of capacitor plates, and each pair of capacitor plates includes a first capacitor plate 401 and a second capacitor plate 402. The first capacitor plate 401 and the second capacitor plate 402 are parallel to each other and have a certain interval.

[0100] The projections of the first capacitor plate 401 and the second capacitor plate 402 in the directions perpendicular to the first capacitor plate 401 and the second capacitor plate 402 (for example, Figure 1 In the embodiment, the projection on the first magnetic member 302 is: Figure 2 In the embodiment, the projection of the first capacitor plate 401 and the projection of the second capacitor plate 402 can be partially overlapped in the measurement direction of the pair of capacitor plates. In the direction perpendicular to the measurement direction, the boundary range of the projection of one capacitor plate can be made larger than the boundary range of the projection of the other capacitor plate (in Figure 3 In the figure, the boundary range of the projection of the first capacitor plate 401 is larger than the boundary range of the second capacitor plate 402).

[0101] The measurement direction of each pair of capacitor plates refers to the direction of displacement that the pair of capacitor plates is used to measure, for example, Figure 1 The optical axis direction in the embodiment is: Figure 2 Any direction within a plane perpendicular to the optical axis in the embodiments.

[0102] For example, under the same inventive concept, the number of the first capacitor plate 401 and / or the second capacitor plate 402 in a pair of capacitor plates can be multiple. Figure 4 , Figure 4 A pair of capacitor plates including a first capacitor plate 401 and two second capacitor plates 402 is shown. The two second capacitor plates 402 are in the same plane, and the first capacitor plate 401 and the two second capacitor plates 402 are parallel to each other and have a certain interval. In the measurement direction, the first capacitor plate 401 and the two second capacitor plates 402 partially overlap, and in the direction perpendicular to the measurement direction, the boundary range of the first capacitor plate 401 is greater than the boundary range of the two second capacitor plates 402.

[0103] That is to say, in each pair of capacitor plates, the first capacitor plate and the second capacitor plate may be in a one-to-one relationship, or in a one-to-many or many-to-one relationship, and the embodiments of the present disclosure are not limited to this.

[0104] It should be noted that Figure 3 and Figure 4The number and shape of the capacitor plates shown in the figure are merely schematic. Any number and shape of capacitor plates may be used according to actual needs, and the present disclosure does not impose any limitation on this.

[0105] Therefore, the capacitor assembly provided by the embodiment of the present disclosure allows the projection of each pair of capacitor plates to partially overlap in the measurement direction, so that a pair of capacitor plates can be displaced in two directions at the same time, for example, in the two directions pointed by the optical axis. In addition, in the direction perpendicular to the measurement direction, the boundary range of the projection of one of the capacitor plates is made larger than the boundary range of the projection of the other capacitor plate, so that the change of the facing area S caused by the movement of the capacitor plate in the non-measurement direction can be avoided, thereby eliminating the error of displacement measurement.

[0106] It is understood that when the capacitor component is applied to Figure 2 In the embodiment shown, at least two pairs of capacitor components can be set to measure displacements in two different directions respectively, so as to meet Figure 2 Measurement requirements in an embodiment.

[0107] Combination of the above Figures 1 to 3 The camera module provided by the embodiment of the present disclosure is described in detail. Based on the same inventive concept, the present disclosure also provides an electronic device, which may include any one or more of the above-mentioned camera modules.

[0108] The electronic device may be any device that can be equipped with a camera module, such as a smart phone, a tablet computer, or a vehicle-mounted monitoring device. The form of the electronic device is not specifically limited in the embodiments of the present disclosure.

[0109] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0110] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0111] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A camera module, characterized in that: include: case; A lens assembly is arranged inside the housing; A driving assembly, disposed outside the lens assembly, and used to drive the lens assembly to move along the optical axis direction of the lens assembly; The capacitance component is used to measure the displacement of the lens component along the optical axis.

2. The camera module according to claim 1, characterized in that: The drive assembly comprises: A coil, wound around the outside of the lens assembly; A first magnetic member is disposed on a side of the coil away from the lens assembly and is fixedly connected to the inner side of the housing; The elastic member is arranged at two ends of the lens assembly and is used to connect the lens assembly and the first magnetic member.

3. The camera module according to claim 2, characterized in that: The capacitor assembly includes a first capacitor plate and a second capacitor plate. The first capacitor plate is fixed to a side of the coil close to the first magnetic member, and the second capacitor plate is fixed to a side of the first magnetic member close to the coil.

4. The camera module according to claim 3, characterized in that: The first capacitor plate is arranged in parallel with the second capacitor plate.

5. The camera module according to claim 3, characterized in that: Projections of the first capacitor plate and the second capacitor plate on the first magnetic member at least partially overlap.

6. The camera module according to claim 3, characterized in that: When the lens assembly moves along the optical axis, the overlapping area of ​​the first capacitor plate and the second capacitor plate projected on the first magnetic member changes.

7. The camera module according to claim 3, characterized in that: The first capacitor plate includes a metal sheet, and the second capacitor plate includes a metal sheet and / or a second magnetic member.

8. A camera module, characterized in that: include: case; A lens assembly is arranged inside the housing; A bottom plate, arranged in the optical axis direction of the lens assembly; A driving assembly, disposed outside the lens assembly, and used for driving the lens assembly to move along the optical axis direction; A supporting assembly, used for supporting the driving assembly on the base plate so that the driving assembly can move in a plane perpendicular to the optical axis direction; The capacitance component is used to measure the displacement of the lens component in the plane.

9. The camera module according to claim 8, characterized in that: The drive assembly comprises: A coil, wound around the outside of the lens assembly; A first magnetic member is arranged on a side of the coil away from the lens assembly; The elastic member is arranged at two ends of the lens assembly and is used to connect the lens assembly and the first magnetic member.

10. The camera module according to claim 8, characterized in that: The supporting assembly comprises a suspension wire, one end of which is fixedly connected to the driving assembly, and the other end of which is fixedly connected to the base plate.

11. The camera module according to claim 8, characterized in that: The capacitor assembly includes a plurality of pairs of capacitor plates, and each pair of capacitor plates is used to measure the displacement of the lens assembly in different directions within the plane.

12. The camera module according to claim 11, characterized in that: Each pair of capacitor plates includes a first capacitor plate and a second capacitor plate, wherein the first capacitor plate is fixed to a side of the bottom plate close to the driving component, and the second capacitor plate is fixed to a side of the driving component close to the bottom plate.

13. The camera module according to claim 12, characterized in that: The first capacitor plate is arranged in parallel with the second capacitor plate.

14. The camera module according to claim 12, characterized in that: The projections of the first capacitor plate and the second capacitor plate on the bottom plate at least partially overlap.

15. The camera module according to claim 12, characterized in that: When the lens assembly moves within the plane, an overlapping area of ​​a first capacitor plate and a second capacitor plate in at least one pair of capacitor plates projected onto the bottom plate changes.

16. The camera module according to claim 12, characterized in that: The first capacitor plate includes a metal sheet, and the second capacitor plate includes a metal sheet and / or a second magnetic member.

17. An electronic device, characterized in that: It comprises the camera module as described in any one of claims 1 to 7 and / or the camera module as described in any one of claims 8 to 16.

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