Displacement control mechanism, camera module and electronic equipment

Abstract

The present application relates to a displacement control mechanism, a camera module and an electronic device. The displacement control mechanism includes: a first magnetic conductive plate and a second magnetic conductive plate arranged opposite to each other along a first direction; a first magnet unit arranged between the first magnetic conductive plate and the second magnetic conductive plate; a coil arranged in a stacked manner with the first magnet unit; an image sensor carrier fixedly connected to the coil; and a displacement detection unit. The displacement detection unit includes a first pole plate and a second pole plate at least partially opposite to each other along the first direction. The first pole plate and the second pole plate are fixedly connected to the image sensor carrier and the second magnetic conductive plate, respectively. In response to the coil being energized, the coil is configured to drive the image sensor carrier to move under the action of the Ampere force of the magnetic field of the first magnet unit. The displacement detection unit is configured to obtain the displacement direction and displacement magnitude of the image sensor carrier based on the capacitance value between the first pole plate and the second pole plate.

Description

Technical Field

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

[0002] VCM motor (Voice Coil Motor), also known as voice coil motor, is a device that converts electrical energy into mechanical energy and realizes linear and limited swing angle movement. It can be used to realize the anti-shake function of the camera.

[0003] In the related technology, VCM motors are often used to drive the lens movement to achieve anti-shake. Hall drivers are often used to detect the displacement of the lens. However, the motor load is heavy, and the Hall driver has low precision and difficult wiring, which affects the anti-shake effect of the camera. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a novel displacement control mechanism, a camera module and an electronic device to improve the anti-shake effect of the camera.

[0005] To achieve the above technical objectives, the present application provides a displacement control mechanism for an image sensor on one hand. The displacement control mechanism includes: a first magnetic conductive plate and a second magnetic conductive plate arranged opposite to each other along a first direction; a first magnetic unit arranged between the first magnetic conductive plate and the second magnetic conductive plate; a coil arranged in a stacked manner with the first magnetic unit and arranged between the first magnetic conductive plate and the second magnetic conductive plate; an image sensor carrier configured to carry the image sensor and fixedly connected to the coil; and a displacement detection unit. The displacement detection unit includes a first pole plate and a second pole plate at least partially opposite to each other along the first direction. The first pole plate is fixedly connected to one of the image sensor carrier and the second magnetic conductive plate, and the second pole plate is fixedly connected to the other of the image sensor carrier and the second magnetic conductive plate. In response to the coil being energized, the coil is configured to drive the image sensor carrier to move under the action of the Ampere force of the magnetic field of the first magnetic unit. The displacement detection unit is configured to obtain the displacement direction and displacement magnitude of the image sensor carrier according to the capacitance value between the first pole plate and the second pole plate.

[0006] In some embodiments, the displacement control mechanism further comprises a circuit board which is fixedly connected to the second magnetic conductive plate and is disposed on a side of the second magnetic conductive plate away from the first magnetic conductive plate.

[0007] In some embodiments, the displacement detection unit is configured to obtain the displacement of the image sensor carrier along the detection direction according to the capacitance value between the first electrode plate and the second electrode plate. The relative area of ​​the first electrode plate and the second electrode plate is rectangular.

[0008] In some embodiments, when the relative area changes as the image sensor carrier moves, the length of the rectangle along a direction perpendicular to the first direction and the detection direction remains unchanged.

[0009] In some embodiments, when the image sensor carrier does not move, the length of the first electrode plate along the detection direction and the length of the second electrode plate along the detection direction are partially staggered and opposite to each other.

[0010] In some embodiments, the first electrode plate includes a first sub-electrode plate and a second sub-electrode plate arranged side by side along the detection direction. The first sub-electrode plate and the second electrode plate constitute a first sub-capacitor. The second sub-electrode plate and the second electrode plate constitute a second sub-capacitor. The displacement detection unit is configured to determine the displacement of the image sensor carrier along the detection direction according to the difference in capacitance values ​​of the first sub-capacitor and the second sub-capacitor.

[0011] In some embodiments, the first sub-plate, the second sub-plate, and the second plate are each rectangular plates. Each of the rectangular plates includes two sides perpendicular to each other. The short side of the two sides is parallel to the detection direction. The first sub-plate, the second sub-plate, and the second plate form a symmetrical capacitor structure. The symmetrical capacitor structure is centrally symmetrically arranged relative to the geometric center of the second plate.

[0012] In some embodiments, the distance between the first sub-plate and the second sub-plate along the detection direction is greater than or equal to 0.5 mm. When the image sensor carrier does not move: the relative area of ​​the first sub-capacitor and the relative area of ​​the second sub-capacitor are respectively greater than zero.

[0013] In some embodiments, within the travel range of the image sensor carrier: the minimum overlapping length of the first sub-plate and the second plate along the detection direction is greater than or equal to a second threshold; the minimum overlapping length of the second sub-plate and the second plate along the detection direction is greater than or equal to the second threshold; the overlapping length of the first sub-plate and the second plate along a fourth direction perpendicular to the detection direction remains unchanged; and the overlapping length of the second sub-plate and the second plate along the fourth direction remains unchanged.

[0014] In some embodiments, within the travel range of the image sensor carrier: the first sub-plate and the second plate extend along the detection direction and the distance between two adjacent sides is greater than or equal to a third threshold; and the second sub-plate and the second plate extend along the detection direction and the distance between two adjacent sides is greater than or equal to the third threshold.

[0015] In some embodiments, the number of the displacement detection units is two, and the detection directions of the two displacement detection units are perpendicular to each other and perpendicular to the first direction.

[0016] In some embodiments, the displacement control mechanism further includes an auxiliary displacement detection capacitor, including a third electrode plate and a fourth electrode plate at least partially disposed opposite to each other. The third electrode plate is fixedly connected to the image sensor carrier, and the fourth electrode plate is fixedly connected to the circuit board. Within the travel range of the image sensor carrier, the relative area of ​​the third electrode plate and the fourth electrode plate remains unchanged.

[0017] In some embodiments, the displacement control mechanism further includes a motion control member connected to the image sensor carrier and the circuit board. The motion control member is configured to allow the image sensor carrier to move in a plane parallel to the second magnetic conductive plate and to restrict the image sensor carrier from moving out of the plane.

[0018] In some embodiments, the motion control member includes a fixed portion, a moving portion, and an elastic deformation portion. The fixed portion is fixedly connected to the circuit board and the elastic deformation portion. The moving portion is fixedly connected to the elastic deformation portion and the image sensor carrier. The coil drives the image sensor carrier to move under the action of the Ampere force, and the image sensor carrier further drives the elastic deformation portion of the motion control member to deform.

[0019] In some embodiments, the elastic deformation portion is an elastic beam, the length direction of the elastic beam is parallel to the second magnetic conductive plate, the elastic beam has a height along a first direction and a thickness along a direction perpendicular to the first direction, and the ratio of the height to the thickness of the elastic beam is in the range of 10 to 50.

[0020] In some embodiments, the coil has a height along the first direction, and a distance between a center of the height of the elastic beam and a center of the height of the coil is less than 300 micrometers.

[0021] In some embodiments, the elastic deformation portion includes a first elastic beam, a second elastic beam, a third elastic beam, and a fourth elastic beam connected end to end in sequence to form a rectangle. The moving portion includes two moving portions fixedly connected to the first elastic beam and the third elastic beam, respectively. The fixed portion includes two fixed portions fixedly connected to the second elastic beam and the fourth elastic beam, respectively.

[0022] In some embodiments, at least one of the first elastic beam, the second elastic beam, the third elastic beam and the fourth elastic beam comprises two elastic sheets, the two elastic sheets are arranged in parallel, or the angle formed by the two elastic sheets extending is less than or equal to 10 degrees.

[0023] In some embodiments, the image sensor carrier is a flexible circuit board. The displacement control mechanism further includes a flexible electrical connector. The flexible electrical connector electrically connects the circuit board and the flexible circuit board.

[0024] In some embodiments, the flexible electrical connector includes a flexible wire portion, a first interface and a second interface, wherein the first interface connects the flexible circuit board and one end of the flexible wire portion, and the second interface connects the circuit board and the other end of the flexible wire portion.

[0025] In some embodiments, the displacement control mechanism further includes a second magnet unit. The second magnet unit is fixedly connected to the image sensor carrier and is disposed inside the coil.

[0026] To achieve the above technical objectives, the present application provides a camera module on the other hand. The camera module includes: a lens assembly for collecting light; the above displacement control mechanism; a gyroscope configured to detect the vibration of the lens assembly; and an image sensor disposed on an image sensor carrier of the displacement control mechanism. In response to the vibration of the lens assembly, the displacement control mechanism causes the image sensor to move in a direction opposite to the vibration direction of the lens assembly.

[0027] In order to achieve the above technical objectives, the present application provides an electronic device in another aspect. The electronic device comprises: a device body and the above camera module. The camera module is arranged on the device body.

[0028] In the technical solution provided in the embodiment of the present application, the image sensor is caused to change in displacement by the cooperation of the energized coil and the magnetic field. Specifically, after the coil is energized, the coil drives the image sensor carrier and the image sensor thereon to change in displacement under the action of the magnetic field of the first magnet unit. Furthermore, a displacement detection unit based on capacitance can be used to detect the displacement size and method of the image sensor carrier, thereby achieving the technical effect of accurately controlling the displacement of the image sensor and improving the anti-shake effect.

[0029] Furthermore, different from the related art, the displacement control mechanism of the present application uses a displacement detection unit based on capacitance to detect the displacement size and direction of the image sensor carrier, thereby improving the speed and accuracy of displacement detection, and correspondingly improving the speed and accuracy of displacement control. Furthermore, the displacement detection unit based on capacitance has simple wiring and occupies a small space, making the displacement control mechanism in the present application simple and compact in structure, easy to assemble, and easy to achieve mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present application will illustrate the implementation methods in conjunction with the accompanying drawings. The accompanying drawings of the present application are only used to describe the embodiments for the purpose of demonstration. Without departing from the principles of the present application, those skilled in the art can easily make other embodiments according to the steps described below through the following description.

[0031] Figure 1 is a schematic diagram of the structure of the displacement control mechanism after assembly in one embodiment of the present application;

[0032] Figure 2 yes Figure 1 A perspective exploded side view of the mid-displacement control mechanism;

[0033] Figure 3 yes Figure 1 A three-dimensional exploded schematic diagram of the displacement control mechanism;

[0034] Figure 4 yes Figure 3 A top view of an image sensor carrier in FIG.

[0035] Figure 5 yes Figure 3 Schematic diagram of the magnetic field arrangement in;

[0036] Figure 6 is a schematic diagram of the arrangement of a displacement detection unit in an embodiment of the present application;

[0037] Figure 7 is a schematic diagram of the arrangement of a displacement detection unit in another embodiment of the present application;

[0038] Figure 8 yes Figure 7 A state diagram of a displacement detection unit;

[0039] Fig. 9 yes Figure 7 Another state diagram of the displacement detection unit;

[0040] Fig.10 is a schematic diagram of an auxiliary displacement detection capacitor in an embodiment of the present application;

[0041] Fig.11 is a side view of a motion control member according to an embodiment of the present application;

[0042] Fig.12 yes Fig.11 Schematic diagram of motion control components in;

[0043] Fig.13 is a schematic diagram of a flexible electrical connector according to an embodiment of the present application;

[0044] Fig.14 yes Fig.13 A connection diagram of a flexible electrical connector;

[0045] Fig.15 is a structural schematic diagram of a camera module in one embodiment of the present application; and

[0046] Fig.16 It is a schematic diagram of the structure of an electronic device in one embodiment of the present application.

[0047] Figure numerals: displacement control mechanism 100, driving magnetic field generating assembly 200, first magnetic conductive plate 210, second magnetic conductive plate 220, first magnet unit 230, circuit board 110, cover 120, through hole 121, light-transmitting sheet 122, image sensor carrier 310, coil 320, second direction driving coil 321, first side portion 3211, second side portion 3212, third direction driving coil 322, third side portion 3221, fourth side portion 3222, second magnet unit 330, displacement detection unit 420, first pole plate 421, first sub-pole plate 4211, second sub-pole plate 4212, second pole plate 422, auxiliary displacement detection capacitor 50 0, third electrode plate 510, fourth electrode plate 520, first direction Z, second direction X, third direction Y, detection direction I, fourth direction J, motion control part 600, plane XY, fixed part 610, moving part 620, elastic deformation part 630, first elastic beam 631, second elastic beam 632, third elastic beam 633, fourth elastic beam 634, flexible electrical connector 700, first interface 710, second interface 720, flexible wire part 730, camera module 800, image sensor 810, lens assembly 820, electronic device 1000, device body 1100, first side 4222, second side 42122, third side 42112. DETAILED DESCRIPTION

[0048] The technical solutions 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. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0049] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 is a schematic diagram of the structure of the displacement control mechanism 100 after assembly in one embodiment of the present application, Figure 2 yes Figure 1 A perspective exploded side view of the middle displacement control mechanism 100, Figure 3 yes Figure 1 The displacement control mechanism 100 can be applied to a camera module 800 (such as a Fig.15 In the present application, the image sensor 810 is also called a photosensitive element, a photoelectric image sensor or an imager, which is a sensor that converts optical image information into electrical signals.

[0052] like Figures 1 to 3 As shown, the displacement control mechanism 100 may include a first magnetic conductive plate 210 and a second magnetic conductive plate 220 disposed opposite to each other along a first direction Z, and a coil 320 and a first magnet unit 230 stacked between the first magnetic conductive plate 210 and the second magnetic conductive plate 220. The first magnet unit 230 is used to generate a magnetic field, and the first magnetic conductive plate 210 and the second magnetic conductive plate 220 may constrain and guide the magnetic field lines of the magnetic field, thereby enhancing the magnetic field strength passing through the coil 320 and reducing the magnetic field lines overflowing outside the coil 320.

[0053] The displacement control mechanism 100 may further include an image sensor carrier 310 configured to carry the image sensor 810. The image sensor carrier 310 is fixedly connected to the coil 320 so as to be movable together with the coil 320. When the displacement control mechanism 100 is working, after the coil 320 is energized, the coil 320 is moved by the Ampere force of the magnetic field, thereby driving the image sensor carrier 310 and the image sensor 810 to move.

[0054] The displacement control mechanism 100 further includes a capacitance-based displacement detection unit 420 (refer to Figure 6 ). The displacement detection unit 420 is configured to detect the displacement size and direction of the image sensor carrier 310 , thereby providing feedback for the displacement effect of the image sensor carrier 310 .

[0055] Continue to refer Figures 1 to 3The displacement control mechanism 100 further includes a circuit board 110 and a cover 120. The circuit board 110 is fixedly connected to the second magnetic conductive plate 220. Figure 3 As shown, the second magnetic conductive plate 220 is fixed to the side of the circuit board 110 facing the first magnetic conductive plate 210. In some embodiments, the second magnetic conductive plate 220 may also be fixed to the side of the circuit board 110 facing away from the first magnetic conductive plate 210.

[0056] like Figure 1 As shown, the cover 120 can be fixedly connected to the circuit board 110. Figure 1 As shown, the cover 120 can be buckled with the circuit board 110 , and the displacement control mechanism 100 can be accommodated in the space formed after the buckling. The first magnetic conductive plate 210 can be embedded in the cover 120 .

[0057] The cover 120 may define a through hole 121. A light-transmitting sheet 122 may be embedded, bonded or covered on the through hole 121 to filter the light that passes through the through hole 121 and irradiates the image sensor 810. The light-transmitting sheet 122 is, for example, a blue glass filter, which may be used to filter a portion of infrared light, visible red light, etc. The light may be incident on the image sensor 810 substantially along the first direction Z.

[0058] The displacement control mechanism 100 may further include a driving unit (not shown). The driving unit may be disposed on the circuit board 110 or the flexible circuit board, or may be disposed on the camera module 800 or the electronic device 1000 described below (see Fig.16 ). The driving unit may be configured to feed and control the current flowing through the coil 320. The driving unit may also be configured to provide power to the displacement detection unit 420 described below and / or receive an output signal from the displacement detection unit 420. The driving unit may be implemented as a circuit, an integrated circuit, a chip, etc., and this application does not make any specific limitations on this.

[0059] refer to Figure 4 , Figure 4 yes Figure 3 FIG. 3 is a top view of the image sensor carrier 310 in FIG. Figure 4 As shown, the displacement control mechanism 100 may also include a second magnet unit 330 fixedly disposed on the image sensor carrier 310. The second magnet unit 330 may be implemented as a magnetic conductive sheet, a magnetic conductive plate, etc., and the present application does not impose specific restrictions on this. The magnetic field of the second magnet unit 330 interacts with the magnetic field of the first magnet unit 230 to generate a force along the first direction Z on the second magnet unit 330. This force can be used to balance the gravity of the image sensor carrier 310 and the coil 320 fixedly connected thereto. In order to enhance the interaction between the second magnet unit 330 and the first magnet unit 230, the second magnet unit 330 may be disposed inside the coil 320. As shown in FIG. Figure 4As shown, the second magnet unit 330 may be surrounded by the coil 320 and disposed at the center of the coil 320 .

[0060] Figure 5 yes Figure 3 Schematic diagram of the magnetic field arrangement in . Figure 5 As shown, the first magnetic conductive plate 210, the first magnet unit 230, the coil 320 and the second magnetic conductive plate 220 are arranged in sequence along the first direction Z. The projections of the first magnetic conductive plate 210 and the second magnetic conductive plate 220 along the first direction Z may overlap at least partially. The projection of the first magnet unit 230 along the first direction Z may overlap at least partially with the first magnetic conductive plate 210 and / or the second magnetic conductive plate 220. Preferably, the projection of the first magnet unit 230 along the first direction Z completely falls into at least one of the first magnetic conductive plate 210 and / or the second magnetic conductive plate 220. Through this arrangement, the first magnetic conductive plate 210 and the second magnetic conductive plate 220 can guide and constrain the magnetic lines of force of the first magnet unit 230, enhance the magnetic field strength between the first magnetic conductive plate 210 and the second magnetic conductive plate 220, and weaken the magnetic field strength outside the space defined by the first magnetic conductive plate 210 and the second magnetic conductive plate 220. The first magnetic conductive plate 210 and the second magnetic conductive plate 220 can be made of magnetic conductive materials, such as magnetic conductive metal materials such as silicon steel.

[0061] Also refer to Figure 4 and Figure 5 The plane where the image sensor carrier 310 is located is a plane perpendicular to the first direction Z, hereinafter also referred to as plane XY, which is defined by the non-parallel or coincident second direction X and third direction Y. The second direction X and the third direction Y may be perpendicular to each other.

[0062] In the present application, the first magnetic conductive plate 210, the first magnet unit 230 and the second magnetic conductive plate 220 may constitute a driving magnetic field generating assembly 200 for generating a magnetic field in which the corresponding coil 320 moves.

[0063] like Figure 4 As shown, two coils 320 may be disposed on the image sensor carrier 310 , which are respectively referred to as a second direction driving coil 321 and a third direction driving coil 322 .

[0064] Looking down at the image sensor carrier 310 along the first direction Z, the second direction driving coil 321 includes a first side portion 3211 and a second side portion 3212 extending along the third direction Y. The first side portion 3211 and the second side portion 3212 are preferably linear sides. After the coil 320 is energized, the current directions in the first side portion 3211 and the second side portion 3212 can flow in opposite directions to each other along the second direction X. The first side portion 3211 and the second side portion 3212 are therefore subjected to the Ampere force along the second direction X.

[0065] In some embodiments, by changing the current magnitude and direction of the second direction driving coil 321, the magnitude and direction of the Ampere force along the second direction X exerted on the second direction driving coil 321 and the image sensor carrier 310 can be changed, thereby changing the displacement of the image sensor 810 along the second direction X.

[0066] Similarly, looking down at the image sensor carrier 310 along the first direction Z, the third direction driving coil 322 includes a third side portion 3221 and a fourth side portion 3222 extending along the second direction X. The third side portion 3221 and the fourth side portion 3222 are preferably linear sides. After the coil 320 is energized, the directions of the currents in the third side portion 3221 and the fourth side portion 3222 may be opposite to each other along the second direction X. The third side portion 3221 and the fourth side portion 3222 may therefore be subjected to an Ampere force along the third direction Y.

[0067] In some embodiments, the second direction drive coil 321 and the third direction drive coil 322 described above can work together so that the image sensor carrier 310 fixedly connected to these coils 320 is subjected to forces along the second direction X and the third direction Y, so that the image sensor carrier 310 and the corresponding image sensor 810 can move within the plane XY, thereby offsetting the shaking caused by the vibration of the body or lens of the electronic device 1000 such as a camera, mobile phone, etc., and achieving an anti-shake effect.

[0068] In some embodiments, the displacement control mechanism 100 may include a driving magnetic field generating component 200 corresponding to each coil 320. Specifically, the displacement control mechanism 100 may include a first sub-driving magnetic field generating component corresponding to the second direction driving coil 321, and a second sub-driving magnetic field generating component corresponding to the third direction driving coil 322.

[0069] refer to Figure 5 , taking the first sub-driving magnetic field generating component as an example, the first magnet unit 230 may include a pair of magnets. The magnetic poles of the pair of magnets facing the coil 320 are opposite in direction, if one is the north pole, the other is the south pole, and vice versa. One of the pair of magnets is facing the first side 3211 of the second direction driving coil 321, and the other of the pair of magnets is facing the second side 3212 of the second direction driving coil 321. In other words, the first side 3211 of the second direction driving coil 321 coincides with the projection of one of the pair of magnets along the first direction Z, and the second side 3212 coincides with the projection of the other of the pair of magnets along the first direction Z.

[0070] The situation of the second sub-driving magnetic field generating component is similar. The first magnet unit 230 of the second sub-driving magnetic field generating component may include a pair of magnets. The magnetic poles of the pair of magnets facing the coil 320 are in opposite directions. If one is the north pole, the other is the south pole, and vice versa. One of the pair of magnets is directly opposite to the third side 3221 of the third directional driving coil 322, and the other of the pair of magnets is directly opposite to the fourth side 3222 of the third directional driving coil 322. In other words, the third side 3221 of the third directional driving coil 322 coincides with the projection of one of the pair of magnets along the first direction Z, and the fourth side 3222 coincides with the projection of the other of the pair of magnets along the first direction Z.

[0071] In some embodiments, the first sub-driving magnetic field generating component and the second sub-driving magnetic field generating component may share the same first magnetic conductive plate 210 , or the first sub-driving magnetic field generating component and the second sub-driving magnetic field generating component may share the same second magnetic conductive plate 220 . Figure 3 2 shows that the first sub-driving magnetic field generating assembly and the second sub-driving magnetic field generating assembly share a second magnetic conductive plate 220 fixed on the circuit board 110 .

[0072] Reference now Figures 6 to 9 The displacement detection unit 420 of the present application is described in detail. Figure 6 Schematic diagram of the arrangement of the displacement detection unit 420 in one embodiment of the present application. Figure 7 FIG. 4 is a schematic diagram of the arrangement of the displacement detection unit 420 in another embodiment of the present application. Figure 8 When the moving distance of the image sensor carrier 310 along the detection direction I reaches the limit of the travel range, Figure 7 State diagram of the displacement detection unit 420 in FIG. Fig. 9 When the moving distance of the image sensor carrier 310 along the fourth direction J reaches the limit of the travel range, Figure 7 The state diagram of the displacement detection unit 420 in FIG. The displacement detection unit 420 of the present application is a displacement detection unit 420 based on capacitance, also known as a capacitive sensor.

[0073] Specifically, the displacement detection unit 420 includes a variable area capacitor. Two conductors that are insulated and spaced apart from each other can form a capacitor, and the two conductors can be called plates of the capacitor. The plates can be metal coatings, metal diaphragms or metal plates, and can also be made of other materials, which is not specifically limited in this application.

[0074] The capacitance value of the capacitor It is equal to the ratio of the charge on the two plates to the voltage between the plates. The capacitance between the parallel plates of a capacitor is . is the dielectric constant of the medium between the plates. It is the area of ​​the relative areas of the two plates of the capacitor, also known as the relative area. is the distance between the two plates. The advantage of the variable area capacitive sensor is that the output is linearly related to the input. If the capacitance does not change, the relative area of ​​the two plates can be determined by the change in capacitance. The change of , and then the relative displacement relationship of the two plates is obtained.

[0075] In the present application, the relative area of ​​the two plates can be a rectangular area, then the relative area It can be expressed as . It can represent the length along the direction in which displacement detection is required, which direction may be referred to as the detection direction hereinafter. , Can represent along and detection direction The length in the vertical direction may be referred to as the fourth direction J hereinafter. If the relative area The change in the relative area along the detection direction can be completely determined by The change in capacitance is proportional to the relative area along the detection direction. The length change, or the change in capacitance value, is proportional to the relative area along the detection direction. Therefore, the relative area of ​​the two electrodes along the detection direction can be determined by the capacitance value or the change of the capacitance value. The length or length change of the electrode can be used to determine the displacement of the image sensor carrier 310 connected to one of the electrodes.

[0076] Specifically, the displacement detection unit 420 includes a first pole plate 421 and a second pole plate 422 that are at least partially opposite to each other. The first pole plate 421 is fixedly connected to one of the image sensor carrier 310 and the second magnetic conductive plate 220 (or the circuit board 110), and the second pole plate 422 is fixedly connected to the other of the image sensor carrier 310 and the second magnetic conductive plate 220 (or the circuit board 110). The displacement detection unit 420 is configured to obtain the displacement direction and displacement magnitude of the image sensor carrier 310 according to the capacitance value between the first pole plate 421 and the second pole plate 422. The displacement detection unit 420 can be electrically coupled to the driving unit of the displacement control mechanism 100, thereby providing real-time displacement feedback to the driving unit to improve the displacement control accuracy and efficiency of the displacement control mechanism 100.

[0077] Since the image sensor carrier 310 can be driven to move in the plane XY in the present application, the pole plate fixedly connected to the image sensor carrier 310 also moves accordingly, and the pole plate can be referred to as a moving pole plate. Accordingly, the pole plate fixedly connected to the second magnetic conductive plate 220 or the circuit board 110 can be referred to as a fixed pole plate. The moving pole plate can be arranged below the image sensor 810 so as not to increase the extra size.

[0078] In the present application, “fixedly connected to the second magnetic conductive plate 220”, “fixedly connected to the second magnetic conductive plate 220”, “fixedly connected to the second magnetic conductive plate 220” and similar expressions can be interpreted as being directly or indirectly fixedly connected to the second magnetic conductive plate 220, or fixedly connected to components such as the circuit board 110 fixedly connected to the second magnetic conductive plate 220.

[0079] As described above, the displacement detection unit 420 may be configured to detect displacement in one direction, which may be referred to as the detection direction I of the displacement detection unit 420. The detection direction I may be, for example, one of the second direction X or the third direction Y. Of course, the detection direction I may also be other directions parallel to the plane XY, and the present application does not impose any specific restrictions on this. The detection direction I may include a positive direction indicated by an arrow of the detection direction I and a relative negative direction.

[0080] The displacement control mechanism 100 of the present application may include at least two displacement detection units 420 to detect the displacement of the image sensor carrier 310 in different directions. For example, the displacement control mechanism 100 may include at least two displacement detection units 420, and the detection directions I of the two displacement detection units 420 are perpendicular to each other and perpendicular to the first direction Z. In some embodiments, the detection directions I of the two displacement detection units 420 may be the second direction X and the third direction Y, respectively.

[0081] exist Figures 6 to 9 In , each capacitor included in the displacement detection unit 420 includes at least two plates opposite to each other along the first direction Z, and the relative area between the plates is a rectangular relative area. The relative area can be understood as the overlapping area or overlapping area of ​​the projections of the two plates along the first direction Z, and the overlapping area is a rectangle. The rectangular relative area is determined by the side length of the area along the detection direction I and the side length along the fourth direction J. Among them, the side length along the detection direction I can be called the relative length of the detection direction, and the side length along the fourth direction J can be called the fourth direction relative length. In Figures 6 to 9 In the embodiment, the relative length in the fourth direction may remain unchanged or constant within the travel range of the image sensor carrier 310. The travel range of the image sensor carrier 310 refers to the distance range or area that the image sensor carrier 310 can move within its normal operating range, which may also be referred to as the working space of the image sensor carrier 310.

[0082] refer to Figure 6 The displacement detection unit 420 includes a moving electrode plate and a fixed electrode plate. Figure 6 In the description, the moving electrode plate is the first electrode plate 421 and the fixed electrode plate is the second electrode plate 422. Optionally, the moving electrode plate may also be the second electrode plate 422, and the fixed electrode plate may also be the first electrode plate 421, and the present application does not impose any specific limitation on this.

[0083] When the image sensor carrier 310 is in an initial state (the initial state is also called a free state) where no movement or displacement occurs, the length of the first electrode plate 421 along the detection direction I and the length of the second electrode plate 422 along the detection direction I are partially staggered and opposite. Specifically, a portion of the length of the first electrode plate 421 along the detection direction I is opposite to a portion of the second electrode plate 422, and the other portion is staggered with the second electrode plate 422. In other words, the relative length of the relative area of ​​the first electrode plate 421 and the second electrode plate 422 in the detection direction is smaller than both the length of the first electrode plate 421 along the detection direction I and the length of the second electrode plate 422 along the detection direction I.

[0084] When the first electrode plate 421 is along the positive direction of the detection direction I ( Figure 6 The detection direction I is indicated by the arrow in the detection direction I) and moves to the first position P1 (such as Figure 6 The relative length of the first electrode plate 421 and the second electrode plate 422 in the detection direction increases, and the relative area increases accordingly. When the first electrode 421 moves in the negative direction of the detection direction I (in the direction of the displacement detection unit 420), the capacitance value of the displacement detection unit 420 increases, and the increase value is positively correlated with the moving distance of the first electrode 421. Figure 6 The detection direction I is in the direction opposite to the direction indicated by the arrow) and moves to the second position P2 (such as Figure 6 As shown by the dashed line in the middle, the relative length of the first electrode plate 421 and the second electrode plate 422 in the detection direction decreases, and the relative area The capacitance value of the displacement detection unit 420 decreases, and the reduced value is positively correlated with the moving distance of the first electrode plate 421 .

[0085] According to the increase or decrease of the capacitance value, the moving direction of the first electrode 421 can be determined, and then the moving direction of the image sensor 810 can be determined. According to the specific value of the increase or decrease of the capacitance value, the moving distance of the first electrode 421 can be determined, and then the displacement of the image sensor 810 can be determined. From another perspective, for Figure 6 In the embodiment shown in , the current displacement size and direction of the image sensor 810 can be determined by the current capacitance value.

[0086] like Figure 6As shown, in the initial state of the image sensor carrier 310, the right side portion of the first electrode plate 421 overlaps with the left side portion of the second electrode plate 422. The first electrode plate 421 and the second electrode plate 422 may also be configured such that, in the initial state, the left side portion of the first electrode plate 421 overlaps with the right side portion of the second electrode plate 422. At this time, the capacitance value of the displacement detection unit 420 increases, indicating that the first electrode plate 421 and the image sensor 810 move toward the negative direction of the detection direction I, while the capacitance value of the displacement detection unit 420 decreases, indicating that the first electrode plate 421 and the image sensor 810 move toward the positive direction of the detection direction I.

[0087] Further, in order to ensure that the relative length of the fourth direction of the relative area of ​​the first electrode plate 421 and the second electrode plate 422 remains unchanged, within the travel range of the image sensor carrier 310, the relative length in the fourth direction may be constantly equal to the length of the first electrode plate 421 along the fourth direction J, or constantly equal to the length of the second electrode plate 422 along the fourth direction J. The travel range of the image sensor carrier 310 is the displacement range of the image sensor carrier 310 driven by the coil 320 under normal working conditions.

[0088] like Figure 6 As shown, the first electrode plate 421 and the second electrode plate 422 may both be rectangular electrodes. One side of the first electrode plate 421 and the second electrode plate 422 are both parallel to the detection direction I.

[0089] In some embodiments, when the image sensor carrier 310 is in an initial state, the symmetry axis of the first electrode plate 421 along the detection direction I may coincide with the symmetry axis of the second electrode plate 422 along the detection direction I. The absolute value of the length difference between the first electrode plate 421 and the second electrode plate 422 along the fourth direction J may be greater than the first threshold value The maximum allowable displacement of the image sensor carrier 310 along the fourth direction J is defined as ,but The first threshold is used to ensure that the relative length of the fourth direction remains unchanged.

[0090] refer to Figures 7 to 9 ,exist Figures 7 to 9 In the embodiment of the present invention, the first electrode plate 421 may include a first sub-electrode plate 4211 and a second sub-electrode plate 4212. The first sub-electrode plate 4211 and the opposite second electrode plate 422 may constitute a first sub-capacitor. The second sub-electrode plate 4212 and the opposite second electrode plate 422 may constitute a second sub-capacitor. The displacement detection unit 420 is configured to determine the displacement direction and displacement magnitude of the image sensor carrier 310 along the detection direction I according to the capacitance values ​​of the first sub-capacitor and the second sub-capacitor.

[0091] In some embodiments, the displacement detection unit 420 may be configured to determine the displacement direction and displacement magnitude of the image sensor carrier 310 along the detection direction I according to the difference in capacitance between the first sub-capacitor and the second sub-capacitor.

[0092] exist Figures 7 to 9 In the embodiments of the present invention, the first sub-plate 4211 and the second sub-plate 4212 are moving plates fixedly connected to the image sensor carrier 310, and the second plate 422 is a fixed plate fixedly connected to the circuit board 110. Optionally, the second plate 422 is a moving plate fixedly connected to the image sensor carrier 310, and the first sub-plate 4211 and the second sub-plate 4212 are fixed plates fixedly connected to the circuit board 110.

[0093] refer to Figure 7 When the image sensor carrier 310 is in an initial state where no movement occurs, the displacement detection unit 420 includes a symmetrical capacitor structure. The first sub-plate 4211, the second sub-plate 4212, and the second plate 422 form the symmetrical capacitor structure. The symmetrical capacitor structure is symmetrically arranged with respect to the detection direction I and the fourth direction J, respectively. In other words, the symmetrical capacitor structure is centrally symmetrically arranged with respect to the geometric center of the second plate 422. Figures 7 to 9 In the figure, two symmetry axes of the second electrode plate 422 along the detection direction I and the fourth direction J are respectively shown by dotted lines. Specifically, the first sub-plate 4211 and the second sub-plate 4212 are arranged side by side along the detection direction I. The first sub-plate 4211 (dashed line) and the second sub-plate 4212 (dashed line) can be symmetrically arranged on both sides of the symmetry axis of the second electrode plate 422 along the detection direction I. In some embodiments, the detection direction I is one of the second direction X or the third direction Y.

[0094] In some embodiments, the first sub-plate 4211, the second sub-plate 4212 and the second plate 422 are each rectangular plates, each rectangular plate includes two sides perpendicular to each other, one side extends along the detection direction I, and the other side extends along the fourth direction J. Optionally, the short side of the two sides is parallel to the detection direction I, and the long side is parallel to the fourth direction J. The first sub-plate 4211 and the second sub-plate 4212 have the same shape and size. Figure 7 As shown, the first sub-plate 4211 and the second sub-plate 4212 have the same size and shape, and are aligned along the fourth direction J.

[0095] In some embodiments, the interval between the first sub-plate 4211 and the second sub-plate 4212 along the detection direction I is greater than 0.5 mm.

[0096] In some embodiments, the first sub-plate 4211 and the second plate 422 have a preset relative area in the initial state, and the second sub-plate 4212 and the second plate 422 have a preset relative area in the initial state. The preset relative area may be greater than zero. In other words, the initial relative area of ​​the first sub-capacitor and the initial relative area of ​​the second sub-capacitor are both greater than zero.

[0097] When the image sensor 810 is along the positive direction of the detection direction I ( Figure 7 When the image sensor 810 moves in the negative direction (the arrow direction of the detection direction I), the capacitance value of the second sub-capacitor increases, and the capacitance value of the first sub-capacitor decreases. Figure 7 When the image sensor 810 moves in the detection direction I (in the opposite direction of the arrow direction in the detection direction I), the capacitance value of the first sub-capacitor increases and the capacitance value of the second sub-capacitor decreases. Therefore, the first sub-capacitor and the second sub-capacitor can each be configured to detect the movement of the image sensor 810 along the detection direction I. In some embodiments, the displacement of the image sensor 810 can be inferred by referring to the capacitance values ​​of the first sub-capacitor and the second sub-capacitor, for example, by referring to the difference between the capacitance values ​​of the first sub-capacitor and the second sub-capacitor. The displacement of the image sensor 810 is proportional to the difference.

[0098] Furthermore, in order to ensure that the relative length of the fourth direction of the relative areas of the first sub-plate 4211 and the second plate 422 remains unchanged, within the travel range of the image sensor carrier 310, the relative length in the fourth direction can be constantly equal to the length of the first sub-plate 4211 along the fourth direction J, or constantly equal to the length of the second plate 422 along the fourth direction J.

[0099] Similarly, in order to ensure that the relative lengths in the fourth direction of the relative areas of the second sub-plate 4212 and the second plate 422 remain unchanged, within the moving range of the image sensor carrier 310, the relative length in the fourth direction may be constantly equal to the length of the second sub-plate 4212 along the fourth direction J, or constantly equal to the length of the second plate 422 along the fourth direction J.

[0100] In some embodiments, the minimum overlapping length of the first sub-plate 4211 and the second plate 422 along the detection direction I is greater than or equal to a second threshold, and the minimum overlapping length of the second sub-plate 4212 and the second plate 422 along the detection direction I is greater than or equal to the second threshold. The second threshold may be, for example, 0.5 mm.

[0101] refer to Figure 8 , Figure 8 FIG. 4 shows a state diagram of the displacement detection unit 420 when the moving distance of the image sensor carrier 310 in the positive direction of the detection direction I reaches the limit of the travel range. Figure 8As shown, when the moving distance of the image sensor carrier 310 along the detection direction I reaches the limit, the minimum overlapping length L1 of the second sub-plate 4212 and the second plate 422 along the detection direction I is greater than or equal to the second threshold value. Similarly, when the moving distance of the image sensor carrier 310 along the negative direction of the detection direction I reaches the limit within the travel range, the minimum overlapping length L1 of the first sub-plate 4211 and the second plate 422 along the detection direction I is also greater than or equal to the second threshold value.

[0102] In some embodiments, within the stroke range of the image sensor carrier 310, the overlapping length of the first sub-plate 4211 and the second plate 422 along the fourth direction J remains unchanged, and the overlapping length of the second sub-plate 4212 and the second plate 422 along the fourth direction J remains unchanged. To ensure this, the first sub-plate 4211 and the second plate 422 extend along the detection direction I and the distance between two adjacent sides is greater than or equal to the third threshold, and the second sub-plate 4212 and the second plate 422 extend along the detection direction I and the distance between two adjacent sides is greater than or equal to the third threshold. The third threshold may be, for example, 0.5 mm. The length of the second plate 422 along the fourth direction J may be greater than the length of the first sub-plate 4211 along the fourth direction J, and the length of the second plate 422 along the fourth direction J may also be greater than the length of the second sub-plate 4212 along the fourth direction J.

[0103] refer to Fig. 9 , Fig. 9 FIG. 4 is a diagram showing a state of the displacement detection unit 420 when the moving distance of the image sensor carrier 310 along the fourth direction J reaches the limit of the travel range. Fig. 9 As shown, the first side 4222 of the second plate 422 extending along the detection direction I is adjacent to the second side 42122 of the second sub-plate 4212 extending along the detection direction I, and when the moving distance of the image sensor carrier 310 along the fourth direction J reaches the limit, the distance between the first side 4222 and the second side 42122 is greater than or equal to the third threshold. The first side 4222 of the second plate 422 extending along the detection direction is adjacent to the third side 42112 of the first sub-plate 4211 extending along the detection direction I, and when the moving distance of the image sensor carrier 310 along the fourth direction J reaches the limit, the distance between the first side 4222 and the third side 42112 is greater than or equal to the third threshold. The third threshold is, for example, 0.5 mm.

[0104] As described above, the displacement of the image sensor 810 is linearly related to the capacitance value of at least one of the first sub-capacitor or the second sub-capacitor, and the displacement of the image sensor 810 can be calculated accordingly.

[0105] In some embodiments, the first sub-capacitor and the second sub-capacitor may be configured to provide a differential signal to jointly feed back the displacement direction and displacement magnitude of the image sensor carrier 310 along the detection direction I.

[0106] refer to Figure 7 , the first sub-plate 4211 and the opposite second plate 422 constitute a first sub-capacitor. The second sub-plate 4212 and the opposite second plate 422 constitute a second sub-capacitor. The first sub-capacitor and the second sub-capacitor are configured as a differential capacitor system for detecting and feeding back the displacement of the image sensor carrier 310 along the detection direction I. The differential capacitor system can utilize the difference between the capacitance changes of the first sub-capacitor and the second sub-capacitor to improve the sensitivity and accuracy of the signal and reduce the influence of environmental noise.

[0107] Specifically, when the displacement of the image sensor carrier 310 along the detection direction I changes, the capacitance value of the first sub-capacitor increases, while the capacitance value of the second sub-capacitor decreases, or vice versa. The capacitance changes of the first sub-capacitor and the second sub-capacitor compensate each other and the absolute change values ​​are theoretically equal. The difference between the capacitance values ​​of the first sub-capacitor and the second sub-capacitor is used to generate a differential signal for determining the displacement of the image sensor carrier 310 along the detection direction I. The differential signal can reduce the influence of common mode noise in the environment, thereby providing more accurate displacement feedback. Common mode noise can be, for example, temperature change, vibration, etc.

[0108] In some embodiments, reference Figure 7 , in the initial state, due to the symmetrical arrangement of the plates, the capacitance difference between the second sub-capacitor and the first sub-capacitor is 0. When the displacement of the image sensor carrier 310 along the detection direction I changes in the positive direction, (increases to positive values ​​along the positive direction of the detection direction I, decreases to negative values), the relative area of ​​the first sub-capacitor increases , the relative area of ​​the second sub-capacitor is reduced .in, represents the length of the relative area of ​​the plates along the fourth direction J. At this time, the capacitance difference between the second sub-capacitor and the first sub-capacitor is Due to the action of the displacement control mechanism 100, the distance between the opposite plates Roughly unchanged. In other words, the capacitance difference between the second sub-capacitor and the first sub-capacitor is proportional to the displacement of the image sensor carrier 310 along the detection direction I in the positive direction. The capacitance difference may be the differential signal described above. The displacement of the image sensor carrier 310 along the detection direction I may be determined by the differential signal.

[0109] In some embodiments, the detection direction I may be, for example, one of the second direction X and the third direction Y, and the fourth direction may be the other of the second direction X and the third direction Y correspondingly.

[0110] In some embodiments, the image sensor carrier 310 may include at least two displacement detection units 420. The detection direction I of one displacement detection unit 420 is the second direction X, and the detection direction I of the other displacement detection unit 420 is the third direction Y.

[0111] The present application utilizes a capacitance-based displacement detection unit 420 to detect the displacement size and direction of the image sensor carrier 310. The displacement of the image sensor carrier 310 is linearly related to the change in capacitance, responds promptly, and is not easily affected by noise, thereby improving the speed and accuracy of displacement detection, and correspondingly improving the speed and accuracy of displacement control.

[0112] Furthermore, the capacitor can be formed by, for example, a coating or a diaphragm, which has a small thickness, occupies a small space, and is simple to produce, so that the displacement control mechanism 100 in the present application has a simple and compact structure, is easy to assemble, and is easy to mass produce.

[0113] like Fig.10 As shown, the displacement control mechanism 100 may further include an auxiliary displacement detection capacitor 500. The auxiliary displacement detection capacitor 500 may include a third pole plate 510 and a fourth pole plate 520 that are at least partially disposed opposite to each other. The third pole plate 510 may be fixedly connected to the image sensor carrier 310, and the fourth pole plate 520 may be fixedly connected to the second magnetic conductive plate 220 or the circuit board 110 that is fixedly connected to the second magnetic conductive plate 220.

[0114] The relative areas of the third electrode plate 510 and the fourth electrode plate 520 remain unchanged within the range of travel of the image sensor carrier 310. The third electrode plate 510 and the fourth electrode plate 520 may be, for example, triangles, quadrilaterals, other polygons or circles, etc., and the present application does not limit the shapes of the third electrode plate 510 and the fourth electrode plate 520. Within the range of travel of the image sensor carrier 310, the relative areas of the third electrode plate 510 and the fourth electrode plate 520 remain unchanged.

[0115] In some embodiments, the third electrode plate 510 and the fourth electrode plate 520 are each circular electrodes, and the centers of the third electrode plate 510 and the fourth electrode plate 520 are aligned along the first direction Z. The third electrode plate 510 and the fourth electrode plate 520 may be, for example, a metal coating, a metal diaphragm, or a metal plate. The third electrode plate 510 and the fourth electrode plate 520 may also be made of other materials, which is not specifically limited in the present application.

[0116] The present application can assist in determining the displacement amplitude and speed of the image sensor carrier 310 according to the change in the capacitance value of the auxiliary displacement detection capacitor 500. For example, the driving unit can combine the outputs of the displacement detection unit 420 and the auxiliary displacement detection capacitor 500 to determine the displacement amplitude and speed of the image sensor carrier 310.

[0117] refer to Fig.11 and Fig.12 , Fig.11 is a side view of a motion control component according to an embodiment of the present application, Fig.12 yes Fig.11 Schematic diagram of the motion control components in .

[0118] As described above, the displacement control mechanism 100 further includes a motion control member 600. The motion control member 600 can be fixedly connected to the image sensor carrier 310 and the circuit board 110. The motion control member 600 is configured to allow the image sensor carrier 310 to move in a plane XY parallel to the second magnetic conductive plate 220, and to restrict the image sensor carrier 310 from moving out of the plane XY.

[0119] When the coil 320 is energized, the coil 320 can be moved relative to the circuit board 110, the first magnetic conductive plate 210, and the second magnetic conductive plate 220 under the action of the Ampere force in the magnetic field of the first magnet unit 230. The movement of the coil 320 can drive the image sensor carrier 310 and the image sensor 810 to move together. At this time, the motion control member 600 fixedly connected to the image sensor carrier 310 can be deformed under the drive of the image sensor carrier 310. Since the motion control member 600 is configured to allow the image sensor carrier 310 to move within the plane XY and limit the image sensor carrier 310 from moving out of the plane XY, the motion control member 600 can substantially limit the displacement of the image sensor 810 within the plane XY.

[0120] When the coil 320 is powered off, the Ampere force on the coil 320 disappears, and the deformed motion control member 600 can return to its original state, thereby driving the image sensor carrier 310 and the image sensor 810 back to their initial positions, that is, the motion control member 600, the image sensor carrier 310 and the image sensor 810 can be reset. The initial position where the motion control member 600 is not deformed can also be called the free position of the image sensor carrier 310.

[0121] like Fig.11 and Fig.12As shown, the motion control member 600 may include a fixed portion 610, a moving portion 620 and an elastic deformation portion 630. The fixed portion 610 is fixedly connected to the elastic deformation portion 630. The fixed portion 610 is also fixedly connected to the circuit board 110. The moving portion 620 is fixedly connected to the elastic deformation portion 630 and the image sensor carrier 310. The elastic deformation portion 630 may be made of an elastic material such as metal, plastic, composite material, etc., and the present application does not make any specific restrictions on this.

[0122] In some embodiments, the elastic deformation part 630 is an elastic beam. The elastic beam may include length, thickness and width. The length direction of the elastic beam is parallel to the second magnetic conductive plate 220 and / or the circuit board 110. The height direction of the elastic beam is along the first direction Z, and the height is also called the depth. The thickness direction of the elastic beam is parallel to the second magnetic conductive plate 220 and / or the circuit board 110, and is perpendicular to the first direction Z and the length direction, and the thickness is also called the width. The ratio of height to thickness can be called the aspect ratio. The elastic deformation part 630 can be set to a high aspect ratio structure, for example, a slender beam with a high aspect ratio. The elastic deformation part 630 with a high aspect ratio structure has a higher ratio of out-of-plane stiffness / in-plane stiffness. For example, the ratio of the height to thickness of the elastic beam is in the range of from 10 times to 50. That is, the aspect ratio can be from 10 to 50. In other words, the elastic deformation portion 630 is configured to be deformable within the plane XY while limiting movement out of the plane, thereby achieving the effect of controlling the movement of the image sensor carrier 310 and the image sensor 810 .

[0123] like Fig.12 As shown, the elastic deformation portion 630 may include a first elastic beam 631, a second elastic beam 632, a third elastic beam 633, and a fourth elastic beam 634 that are sequentially connected end to end to form a rectangle. In some embodiments, the first elastic beam 631, the second elastic beam 632, the third elastic beam 633, and the fourth elastic beam 634 may be integrally formed, or at least two of the first elastic beam 631, the second elastic beam 632, the third elastic beam 633, and the fourth elastic beam 634 may be integrally formed.

[0124] In some embodiments, at least one of the first elastic beam 631, the second elastic beam 632, the third elastic beam 633, and the fourth elastic beam 634 may include at least two elastic sheets spaced apart along the thickness direction thereof. In some embodiments, the two elastic sheets may be arranged in parallel or substantially in parallel. In some embodiments, the two elastic sheets may be arranged symmetrically, and the plane angle formed by the extension of the two elastic sheets may be less than or equal to 10 degrees. Providing a plurality of substantially parallel elastic sheets may enhance the bending stiffness of the elastic beam along the first direction Z, and ensure that the elastic beam maintains a substantially linear state along its length direction during deformation.

[0125] In some embodiments, the moving portion 620 may include two moving portions 620 respectively fixedly connected to the first elastic beam 631 and the third elastic beam 633 opposite to each other. The moving portion 620 may include a first fixing piece protruding from the elastic deformation portion 630. The first fixing piece may be fixedly connected to the periphery or any side surface of the image sensor carrier 310 by bonding, welding, etc. In some embodiments, the elastic deformation portion 630 may surround the image sensor carrier 310.

[0126] In some embodiments, the fixing portion 610 may include two fixing portions 610 respectively fixedly connected to the opposite second elastic beam 632 and fourth elastic beam 634. The fixing portion 610 may include a second fixing piece protruding from the elastic deformation portion 630. The second fixing piece may be fixedly connected to any side of the circuit board 110 by bonding, welding, etc. Fig.11 As shown, the second fixing sheet can be fixedly connected to a side of the circuit board 110 facing the second magnetic conductive plate 220 .

[0127] In some embodiments, the height center of each elastic beam along the first direction Z can be roughly aligned with the height center of the coil 320 along the first direction Z. For example, in the initial position of the motion control member 600 without deformation, the distance between the height center of the elastic beam and the height center of the coil 320 is less than 20%, 10% or 5% of the height of the elastic beam. In some embodiments, the distance between the height center of the elastic beam and the height center of the coil 320 is less than 300 microns. Through this arrangement, it can be ensured that the action plane of the Ampere force on the coil 320 is roughly flush with the center point of the elastic beam, thereby reducing the out-of-plane deformation of the motion control member 600.

[0128] The electrical flexible connector 700 (Electrical Connect Flexure, ECF) is configured to connect the circuit board 110 and the image sensor carrier 310 .

[0129] refer to Fig.13 and Fig.14 , Fig.13 is a schematic diagram of a flexible electrical connector according to an embodiment of the present application. Fig.14 yes Fig.13 Schematic diagram of the connection of the flexible electrical connector.

[0130] like Fig.13 and Fig.14As shown, the flexible electrical connector 700 includes a flexible wire portion 730 and a first interface 710 and a second interface 720 electrically connected to both ends of the flexible wire portion 730. The first interface 710 is also electrically connected to the image sensor carrier 310. The second interface 720 is also electrically connected to the circuit board 110. For example, the first interface 710 includes a pin or a lead, which can be connected to the image sensor carrier 310 by wire bonding or wire bonding. Similarly, the second interface 720 can also include a pin or a lead, which can be connected to the circuit board 110 by wire bonding or wire bonding.

[0131] In some embodiments, when the image sensor carrier 310 is driven to move in the plane XY by the Ampere force exerted on the coil 320 , the first interface 710 and the flexible wire portion 730 may be moved driven by the image sensor carrier 310 .

[0132] In some embodiments, the flexible wire portion 730 may include a plurality of wires. The plurality of wires may be arranged side by side and fixedly connected to form a long strip. The flexible wire portion 730 may ensure the effective electrical connection function of the first interface 710 and the second interface 720 in the case of frequent movement. In some embodiments, the flexible electrical connector 700 may be made by a preparation process such as photolithography and etching of a silicon wafer. The number of the flexible electrical connectors 700 may also be set to one or more, and the present application does not impose any specific restrictions on this.

[0133] This application also provides a camera module 800, see Fig.15 , Fig.15 FIG. 8 is a schematic diagram showing the structure of a camera module 800 in an embodiment of the present application. Fig.15 As shown, the camera module 800 may include: a lens assembly 820, a displacement control mechanism 100 as described above, and an image sensor 810 (refer to Figure 4 ).

[0134] Specifically, the lens assembly 820 is used to collect light. The lens assembly 820 can be arranged on the cover 120 described above. The image sensor 810 can be arranged on the image sensor carrier 310 of the displacement control mechanism 100 described above. The camera module 800 may also include a gyroscope (not shown). The gyroscope may be configured to detect the vibration or shaking of the lens assembly 820. After the gyroscope detects the vibration of the lens assembly 820, the displacement that the lens module needs to compensate can be calculated according to the vibration angle and / or amplitude of the lens assembly 820. Further, in response to the vibration of the lens assembly 820, the displacement control mechanism 100 can drive the image sensor 810 to move in the direction opposite to the vibration direction of the lens assembly 820, thereby achieving an anti-shake effect. That is, the body anti-shake function based on the image sensor 810 is realized. Optionally, the movement of the image sensor 810 can be a movement close to the amplitude of the vibration of the lens assembly 820 to offset the shaking caused by the vibration of the lens assembly 820, thereby achieving an anti-shake effect.

[0135] The present application also provides an electronic device 1000. Fig.16 , Fig.16 FIG. 1 shows a schematic diagram of the structure of an electronic device 1000 in an embodiment of the present application. Specifically, Fig.16 As shown, the electronic device 1000 includes: a device body 1100 and the camera module 800 as described above. The camera module 800 is arranged on the device body 1100. The electronic device 1000 provided in this embodiment has the same beneficial effects as the camera module 800 in this application, and will not be described one by one.

[0136] The above are only preferred implementations of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A displacement control mechanism for an image sensor, characterized in that: The displacement control mechanism comprises: A first magnetic conductive plate and a second magnetic conductive plate arranged opposite to each other along a first direction; A first magnet unit is disposed between the first magnetic conductive plate and the second magnetic conductive plate; A coil is stacked with the first magnetic unit and arranged between the first magnetic conductive plate and the second magnetic conductive plate; an image sensor carrier configured to carry the image sensor and fixedly connected to the coil; a displacement detection unit, comprising a first pole plate and a second pole plate at least partially opposite to each other along the first direction, wherein the first pole plate is fixedly connected to one of the image sensor carrier and the second magnetic conductive plate, and the second pole plate is fixedly connected to the other of the image sensor carrier and the second magnetic conductive plate, Wherein, in response to the coil being energized, the coil is configured to drive the image sensor carrier to move under the action of the Ampere force of the magnetic field of the first magnet unit, The displacement detection unit is configured to obtain a displacement direction and a displacement magnitude of the image sensor carrier according to a capacitance value between the first electrode plate and the second electrode plate; The second magnet unit is fixedly connected to the image sensor carrier and is arranged inside the coil, and the magnetic field of the second magnet unit interacts with the magnetic field of the first magnet unit.

2. The displacement control mechanism according to claim 1, characterized in that: Also includes: The circuit board is fixedly connected to the second magnetic conductive plate and is arranged on a side of the second magnetic conductive plate away from the first magnetic conductive plate.

3. The displacement control mechanism according to claim 1, characterized in that: The displacement detection unit is configured to obtain the displacement of the image sensor carrier along the detection direction according to the capacitance value between the first electrode plate and the second electrode plate; and The opposing area of ​​the first electrode plate and the second electrode plate is rectangular.

4. The displacement control mechanism according to claim 3, characterized in that: When the relative area changes as the image sensor carrier moves, the length of the rectangle along a direction perpendicular to the first direction and the detection direction does not change.

5. The displacement control mechanism according to claim 4, characterized in that: When the image sensor carrier does not move, the length of the first electrode plate along the detection direction and the length of the second electrode plate along the detection direction are partially staggered and opposite to each other.

6. The displacement control mechanism according to claim 1, characterized in that: The first electrode plate includes a first sub-electrode plate and a second sub-electrode plate arranged side by side along the detection direction. The first sub-plate and the second plate constitute a first sub-capacitor, The second sub-plate and the second plate constitute a second sub-capacitor, The displacement detection unit is configured to determine a displacement of the image sensor carrier along the detection direction according to a difference between capacitance values ​​of the first sub-capacitor and the second sub-capacitor.

7. The displacement control mechanism according to claim 6, characterized in that: The first sub-plate, the second sub-plate and the second plate are each a rectangular plate, each of the rectangular plates includes two sides perpendicular to each other, wherein the short side of the two sides is parallel to the detection direction, When the image sensor carrier does not move: The first sub-plate, the second sub-plate and the second plate form a symmetrical capacitor structure, and the symmetrical capacitor structure is centrally symmetrically arranged with respect to a geometric center of the second plate.

8. The displacement control mechanism according to claim 7, characterized in that: The distance between the first sub-plate and the second sub-plate along the detection direction is greater than or equal to 0.5 mm; and When the image sensor carrier does not move: A relative area of ​​the first sub-capacitor and a relative area of ​​the second sub-capacitor are respectively greater than zero.

9. The displacement control mechanism according to claim 7, characterized in that: Within the travel range of the image sensor carrier: The minimum overlapping length of the first sub-plate and the second plate along the detection direction is greater than or equal to a second threshold; The minimum overlapping length of the second sub-plate and the second plate along the detection direction is greater than or equal to the second threshold; The overlapping length of the first sub-plate and the second plate along a fourth direction perpendicular to the detection direction remains unchanged; as well as The overlapping length of the second sub-plate and the second plate along the fourth direction remains unchanged.

10. The displacement control mechanism according to claim 9, characterized in that: Within the travel range of the image sensor carrier: The first sub-plate and the second sub-plate extend along the detection direction and a distance between two adjacent sides is greater than or equal to a third threshold; and The second sub-plate and the second plate extend along the detection direction, and a distance between two adjacent sides is greater than or equal to a third threshold.

11. The displacement control mechanism according to claim 2, characterized in that: The number of the displacement detection units is two, and the detection directions of the two displacement detection units are perpendicular to each other and perpendicular to the first direction.

12. The displacement control mechanism according to claim 2, characterized in that: Also includes: The auxiliary displacement detection capacitor includes a third plate and a fourth plate which are at least partially arranged opposite to each other. The third electrode plate is fixedly connected to the image sensor carrier, and the fourth electrode plate is fixedly connected to the circuit board. Within the travel range of the image sensor carrier, the relative areas of the third electrode plate and the fourth electrode plate remain unchanged.

13. The displacement control mechanism according to claim 2, characterized in that: The displacement control mechanism also includes: a motion control member connected to the image sensor carrier and the circuit board, The motion control member is configured to allow the image sensor carrier to move in a plane parallel to the second magnetic conductive plate and to restrict the image sensor carrier from moving out of the plane.

14. The displacement control mechanism according to claim 13, characterized in that: The motion control member includes a fixed portion, a moving portion and an elastic deformation portion. The fixing portion is fixedly connected to the circuit board and the elastic deformation portion, and The moving part is fixedly connected to the elastic deformation part and the image sensor carrier, The coil drives the image sensor carrier to move under the action of the Ampere force, and the image sensor carrier further drives the elastic deformation part of the motion control member to deform.

15. The displacement control mechanism according to claim 14, characterized in that: The elastic deformation part is an elastic beam, The length direction of the elastic beam is parallel to the second magnetic conductive plate, The elastic beam has a height along the first direction and a thickness along a direction perpendicular to the first direction, and a ratio of the height of the elastic beam to the thickness is in a range from 10 to 50.

16. The displacement control mechanism according to claim 15, characterized in that: The coil has a height along the first direction, and The distance between the height center of the elastic beam and the height center of the coil is less than 300 microns.

17. The displacement control mechanism according to claim 16, characterized in that: The elastic deformation portion includes a first elastic beam, a second elastic beam, a third elastic beam and a fourth elastic beam connected end to end to form a rectangular shape. The moving part includes two moving parts respectively fixedly connected to the first elastic beam and the third elastic beam, and The fixing portion includes two fixing portions respectively fixedly connected to the second elastic beam and the fourth elastic beam.

18. The displacement control mechanism according to claim 17, characterized in that: At least one of the first elastic beam, the second elastic beam, the third elastic beam and the fourth elastic beam comprises two elastic sheets; The two elastic sheets are arranged in parallel, or the angle formed by the extension of the two elastic sheets is less than or equal to 10 degrees.

19. The displacement control mechanism according to claim 2, characterized in that: The image sensor carrier is a flexible circuit board, The displacement control mechanism also includes: A flexible electrical connector electrically connects the circuit board and the flexible circuit board.

20. The displacement control mechanism according to claim 19, characterized in that: The flexible electrical connector includes a flexible wire portion, a first interface and a second interface. The first interface connects the flexible circuit board and one end of the flexible wire portion, and the second interface connects the circuit board and the other end of the flexible wire portion.

21. A camera module, characterized in that: include: A lens assembly, wherein the lens assembly is used to collect light; The displacement control mechanism according to any one of claims 1 to 20; a gyroscope configured to detect vibrations of the lens assembly; An image sensor, disposed on an image sensor carrier of the displacement control mechanism; Wherein, in response to the vibration of the lens assembly, the displacement control mechanism causes the image sensor to move in a direction opposite to the vibration direction of the lens assembly.

22. An electronic device, characterized in that: include: Equipment body; and The camera module as described in claim 21 is arranged on the device body.

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