Adjustable aperture assembly, camera device and electronic device

Abstract

Embodiments of the present disclosure relate to the technical field of photography, and provide an adjustable aperture assembly, a camera device and an electronic device. The adjustable aperture assembly comprises: a base provided with a through hole used for accommodating a lens; a plurality of fan blades, wherein the plurality of fan blades define an aperture directly facing the through hole; a driving assembly for driving the fan blades to rotate; at least one fan blade correspondingly having a variable capacitor, wherein the variable capacitor comprises a first electrode plate and a second electrode plate which directly face the fan blade, a directly-facing area being provided between the first electrode plate and the second electrode plate; a dielectric structure, wherein the fan blades rotate to drive the dielectric structure to move so that the dielectric structure moves to the directly-facing region, and the length of the portion of the dielectric structure located in the directly-facing region is changed; and a processor configured to acquire the capacitance value variation of the variable capacitor during rotation of the fan blades and measure the rotation angle of the fan blades on the basis of the capacitance value variation. According to the embodiments of the present disclosure, the capacitance value variation can be measured at least by changing the capacitance value, and the aperture opening size can be controlled on the basis of the relationship between the rotation angle of the fan blades and the capacitance.

Description

Adjustable aperture assembly, camera equipment and electronic equipment

[0001] Cross-references

[0002] This disclosure claims priority to the Chinese patent application entitled “Adjustable aperture assembly, camera device and electronic device” filed on November 23, 2023, with application number 202311575542.7, which is incorporated herein by reference in its entirety. Technical Field

[0003] The embodiments of the present disclosure relate to the field of imaging technology, and in particular to an adjustable aperture assembly, an imaging device, and an electronic device. Background Art

[0004] As people's demand for video recording in daily life continues to increase, the demand for improving the shooting quality of video recording equipment is also gradually increasing.

[0005] The size of the camera's aperture controls the amount of light entering the camera, which in turn affects the quality of the image. Related technologies typically use Hall effect detection to measure light intensity in cameras. A detection magnet is installed in the camera device. The Hall effect detection controls the size of the aperture by detecting changes in the magnetic field.

[0006] However, this detection method requires installing a detection magnet in the camera device, which occupies the internal space of the camera device. At the same time, the motor installed in the camera device will also generate magnetic field interference, affecting the detection accuracy and further affecting the control of the aperture opening size.

[0007] Summary of the Invention

[0008] The embodiments of the present disclosure provide an adjustable aperture assembly, a camera device, and an electronic device, which are at least conducive to achieving the purpose of detecting the rotation angle of the fan blades while improving the detection accuracy and reducing the space occupied by the adjustable aperture assembly.

[0009] According to some embodiments of the present disclosure, on the one hand, an embodiment of the present disclosure provides an adjustable aperture assembly, comprising: a base, the base having a through hole for accommodating a lens; a plurality of fan blades, the plurality of fan blades being circumferentially spaced around the through hole, and one end of the fan blade being rotatably connected to the base, the plurality of fan blades forming an aperture facing the through hole; a driving assembly, the driving assembly being used to drive the fan blades to rotate to adjust the size of the aperture; at least one of the fan blades corresponding to a variable capacitor, the variable capacitor comprising: a first electrode plate and a second electrode plate facing the fan blade, and a facing area between the first electrode plate and the second electrode plate; a dielectric structure, the dielectric structure being arranged on the fan blade, the fan blade rotates to drive the dielectric structure to move, so that the dielectric structure moves to the facing area, and during the rotation of the fan blade, the length of the portion of the dielectric structure located in the facing area changes; a processor, the processor being configured to obtain a capacitance value change of the variable capacitor during the rotation of the fan blade, and detect the angle of rotation of the fan blade based on the capacitance value change.

[0010] In some embodiments, the dielectric structure is disposed on a surface of the fan blade facing the base; wherein the first electrode plate and the second electrode plate are disposed opposite to each other in a direction parallel to the surface of the fan blade.

[0011] In some embodiments, the adjustable aperture assembly further includes: a connecting portion, one end of which is arranged on the surface of the fan blade facing the base, wherein the dielectric structure is connected to the other end of the connecting portion; wherein the first electrode plate and the second electrode plate are arranged relative to each other in a direction perpendicular to the surface of the fan blade.

[0012] In some embodiments, the dielectric structure is an arc-shaped structure along the rotation direction of the fan blade.

[0013] In some embodiments, the first electrode plate is a continuous structure, and the capacitance value of the variable capacitor is 1.

[0014] In some embodiments, the first electrode plate includes: at least two sub-plates spaced apart along the rotation direction of the fan blade, wherein the number of capacitance values ​​of the variable capacitor is the same as the number of the sub-plates.

[0015] In some embodiments, the number of the sub-plates is greater than or equal to 3, and the spacing between adjacent sub-plates is the same.

[0016] In some embodiments, the processor is further configured to store a correspondence between the capacitance value of the variable capacitor and the rotation angle of the fan blade, and detect the rotation angle of the fan blade based on the correspondence and the change in the capacitance value.

[0017] According to some embodiments of the present disclosure, another aspect of the present disclosure provides an imaging device, including: a lens; and an adjustable aperture assembly as described above for controlling the aperture of the lens.

[0018] According to some embodiments of the present disclosure, another aspect of the present disclosure provides an electronic device, including: the adjustable aperture assembly as described above, or the camera device as described above.

[0019] The technical solution provided by the embodiments of the present disclosure has at least the following advantages:

[0020] In the technical solution of the adjustable aperture assembly provided by the embodiment of the present disclosure, the base has a through hole for accommodating a lens; a plurality of fan blades, the plurality of fan blades are arranged at circumferential intervals around the through hole, and one end of the fan blade is rotatably connected to the base, and the plurality of fan blades form an aperture facing the through hole; a driving assembly, the driving assembly is used to drive the fan blades to rotate to adjust the size of the aperture; at least one fan blade corresponds to a variable capacitor, the variable capacitor includes: a first electrode plate and a second electrode plate facing the fan blade, and a facing area is provided between the first electrode plate and the second electrode plate; a dielectric structure, the dielectric structure is arranged on the fan blade, the fan blade rotates to drive the dielectric structure to move, so that the dielectric structure moves to the facing area, and during the rotation of the fan blade, the length of the portion of the dielectric structure located in the facing area changes; the processor, the processor is configured to obtain the change in capacitance value of the variable capacitor during the rotation of the fan blade, and detect the angle of rotation of the fan blade based on the change in capacitance value. In the technical solution of the adjustable aperture assembly provided by the embodiment of the present disclosure, as the driving assembly drives the fan blade to rotate, the length of the portion of the dielectric structure provided on the fan blade located in the area directly facing each other between the first electrode plate and the second electrode plate changes, and the capacitance changes accordingly. A processor is used to obtain the capacitance value change during the rotation of the fan blade and detect the angle of rotation of the fan blade. Therefore, the capacitance value change can be detected without additionally providing a detection magnet in the camera device. Based on the relationship between the rotation angle of the fan blade and the capacitance, when the required light value is selected, the corresponding rotation angle of the fan blade is controlled, that is, the aperture opening size is controlled. The dielectric structure provided by the embodiment of the present disclosure is provided on the fan blade and no longer occupies additional space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] FIG1 is a partial structural diagram of an adjustable aperture assembly provided by an embodiment of the present disclosure.

[0023] FIG2 is a schematic diagram of a top view of the fan blade, dielectric structure, first electrode plate, and second electrode plate in FIG1 .

[0024] FIG3 is a schematic diagram of simulation results of capacitance and blade rotation angle in an adjustable aperture assembly provided by an embodiment of the present disclosure.

[0025] FIG4 is another partial structural diagram of the adjustable aperture assembly provided in an embodiment of the present disclosure.

[0026] FIG5 is another schematic diagram of simulation results of capacitance and blade rotation angle in the adjustable aperture assembly provided by an embodiment of the present disclosure.

[0027] FIG6 is another partial structural diagram of the adjustable aperture assembly provided in an embodiment of the present disclosure.

[0028] FIG7 is a schematic structural diagram of an imaging device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] As known from the background art, the current adjustable aperture assembly has the problem of occupying the internal space of the camera device, generating magnetic field interference, and affecting the detection accuracy.

[0030] In related technologies, hall detection (Hall effect detection) is usually used to detect capacitance. Hall detects changes in magnetic field, so a certain amount of space must be reserved in the structure for the detection magnet and hall. The detection magnet and hall will occupy additional internal space of the camera device, and in complex camera modules, there will be various magnetic field interferences in the motor body, affecting the detection accuracy.

[0031] The embodiments of the present disclosure provide an adjustable aperture assembly, a camera device, and an electronic device, which are at least conducive to achieving the purpose of detecting the rotation angle of the fan blades while improving the detection accuracy and reducing the space occupied by the adjustable aperture assembly.

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0033] FIG1 is a partial structural diagram of an adjustable aperture assembly provided in an embodiment of the present disclosure, and FIG2 is a top view structural diagram of the fan blades, dielectric structure, first electrode plate, and second electrode plate in FIG1 .

[0034] 1 and 2 , the adjustable aperture assembly provided by the embodiment of the present disclosure includes a base 1 having a through hole for accommodating a lens.

[0035] Specifically, the base 1 is a disc-shaped structure, and the base 1 is made of plastic. In some embodiments, a metal base can also be used to make the structure of the adjustable aperture assembly more stable.

[0036] The area of ​​the through hole is adapted to the cross-sectional area of ​​the lens so as to accommodate the lens without affecting the imaging of the lens.

[0037] The adjustable aperture assembly further includes a plurality of blades 2, which are circumferentially spaced around the through hole, and one end of the blade 2 is rotatably connected to the base 1, and the plurality of blades 2 form an aperture facing the through hole.

[0038] The plurality of blades 2 can be evenly distributed around the through hole axially, and the plurality of blades 2 are arranged to form an aperture, and the plurality of blades 2 rotate around the through hole axis to change the size of the aperture. The plurality of blades can be made of plastic material.

[0039] The adjustable aperture assembly further includes a driving assembly 3, which is used to drive the fan blades 2 to rotate to adjust the size of the aperture.

[0040] Specifically, a driving magnet and a driving coil are arranged on the base 1, and the driving magnet and the driving coil are arranged opposite to each other. When the driving coil is energized, a unidirectional magnetic field is generated. With the cooperation of the alternating magnetic field generated by the driving magnet and the driving coil, the fan blades 2 are driven to rotate. The rotation angle of the fan blades 2 affects the size of the aperture opening, and thus affects the amount of light entering.

[0041] At least one fan blade 2 has a corresponding variable capacitor. The variable capacitor includes a first electrode plate 4 and a second electrode plate 5 facing the fan blade 2, and a facing area is defined between the first electrode plate 4 and the second electrode plate 5. The variable capacitor also includes a dielectric structure 6, which is disposed on the fan blade 2. The fan blade 2 rotates to drive the dielectric structure 6 to move, so that the dielectric structure 6 moves to the facing area, and during the rotation of the fan blade 2, the length of the portion of the dielectric structure 6 located in the facing area changes.

[0042] Specifically, the medium between first plate 4 and second plate 5 is air, and a dielectric structure 6 is provided on blade 2. Rotation of blade 2 drives dielectric structure 6 to the area directly facing first plate 4 and second plate 5, thereby changing the dielectric constant of the medium between first plate 4 and second plate 5. According to Equation 1, when the area of ​​the first plate or the second plate, or the vertical distance between the first plate and the second plate, remains unchanged, the capacitance between the first plate 4 and the second plate 5 will change only if the dielectric constant of the medium between the first plate 4 and the second plate 5 changes.

[0043] 1 and 2 , in some embodiments, the dielectric structure 6 is disposed on the surface of the fan blade 2 facing the base 1 ; wherein the first electrode plate 4 and the second electrode plate 5 are disposed opposite to each other in a direction parallel to the surface of the fan blade 2 .

[0044] Specifically, the capacitance between two parallel plates is calculated as: C = εS / d Equation 1

[0045] Wherein, ε is the dielectric constant of the medium, S is the area of ​​the first electrode plate, and d is the vertical distance between the first electrode plate and the second electrode plate.

[0046] From the capacitance calculation formula between two parallel plates, it can be seen that for two parallel plates, changing the dielectric constant of the medium between the plates can cause a change in capacitance.

[0047] The adjustable aperture assembly further includes a processor 7 , which is configured to obtain a capacitance change of the variable capacitor during the rotation of the fan blade 2 , and detect the rotation angle of the fan blade 2 based on the capacitance change.

[0048] Specifically, the processor 7 can be configured as an embedded processor (e.g., an Advanced RISC Machine, etc.). The processor 7 may include a receiving module and a detection module, wherein the receiving module is configured to obtain a capacitance change of the variable capacitor during rotation of the fan blade 2, and the detection module is electrically connected to the receiving module and configured to detect the rotation angle of the fan blade 2 based on the capacitance change received by the receiving module.

[0049] FIG2 is a schematic diagram of a top view of the fan blade, dielectric structure, first electrode plate, and second electrode plate in FIG1 .

[0050] 1 and 2 , in the first embodiment of the present disclosure, during the rotation of the blade 2 , the length of the portion of the dielectric structure 6 located in the facing area changes, thereby changing the capacitance as the rotation angle of the blade 2 changes.

[0051] In some embodiments, the dielectric structure 6 is an arc-shaped structure along the rotation direction of the fan blade 2. In other embodiments, the dielectric structure 6 may also be a prismatic or trapezoidal structure, as long as the dielectric constant of the medium between the first electrode plate 4 and the second electrode plate 5 can be changed during the rotation of the fan blade 2.

[0052] Specifically, in order to prevent friction, the width of the dielectric structure 6 is smaller than the width of the area facing the first electrode plate 4 and the second electrode plate 5. The dielectric structure 6 is closer to the first electrode plate 4 and the second electrode plate 5 relative to other areas on the fan blade 2, thereby achieving a change in the dielectric constant of the medium between the first electrode plate 4 and the second electrode plate 5 when the fan blade 2 rotates.

[0053] In other embodiments, the width of the dielectric structure 6 can be set to be greater than or equal to the width of the facing area between the first electrode plate 4 and the second electrode plate 5, and the height of the dielectric structure 6 in the direction perpendicular to the fan blade 2 can be less than the height of the first electrode plate 4 and the second electrode plate 5 in the direction perpendicular to the fan blade 2. Therefore, when the fan blade 2 rotates, the length of the portion of the dielectric structure 6 located in the facing area changes, the dielectric constant of the medium between the first electrode plate 4 and the second electrode plate 5 changes, and the capacitance also changes.

[0054] In some embodiments, the lengths of the first electrode plate 4 and the second electrode plate 5 in the facing direction can be the same. In other embodiments, the lengths of the dielectric structure 6, the first electrode plate 4, and the second electrode plate 5 are not limited, as long as the length of the portion of the dielectric structure 6 in the facing region changes during the rotation of the fan blade 2.

[0055] The dielectric structure 6 may be disposed on the fan blade 2. In some embodiments, the dielectric structure 6 may be connected to the fan blade 2 in a fixed manner, such as by welding.

[0056] The dielectric structure 6 can also be made of the same material as the fan blades 2, such as plastic. The material of the dielectric structure 6 can also be mica or ceramic, which is not limited here.

[0057] FIG3 is a schematic diagram of simulation results of capacitance and blade rotation angle in an adjustable aperture assembly provided by an embodiment of the present disclosure.

[0058] 3 , in this embodiment, the capacitance value of the variable capacitor is 1. FIG3 is a schematic diagram showing simulation results of the relationship between the rotation angle of the blade 2 and the capacitance between the first electrode plate 4 and the second electrode plate 5 during the rotation of the blade 2 when a dielectric structure 6 is provided on the blade 2. The horizontal axis represents the counterclockwise rotation angle of the blade 2, and the vertical axis represents the capacitance value of the variable capacitor.

[0059] The processor 7 is further configured to store a correspondence between the capacitance value of the variable capacitor and the rotation angle of the fan blade 2, and detect the rotation angle of the fan blade 2 based on the correspondence and the change in the capacitance value.

[0060] Specifically, in the disclosed embodiment, a detection device may also be provided to detect the capacitance of the area facing each other between the first electrode plate 4 and the second electrode plate 5, thereby achieving closed-loop control of the rotation angle of the fan blade 2, and further achieving control of the amount of light entering the camera. Based on the correspondence between the capacitance value of the variable capacitor pre-stored in the processor 7 and the rotation angle of the fan blade 2, the capacitance value corresponding to the target position is determined as the target capacitance value, and the rotation angle of the fan blade 2 is controlled by cooperating with the drive component 3, the processor 7, and the detection device.

[0061] Figure 4 is another partial top view of the adjustable aperture assembly provided by an embodiment of the present disclosure. The adjustable aperture assembly shown in Figure 4 is substantially identical to the adjustable aperture assembly shown in Figures 1 and 2 , with the primary difference being that, with reference to Figure 4 , the first electrode plate 4 is configured as a differential structure. Specifically, the first electrode plate 4 comprises two sub-electrode plates spaced apart along the rotational direction of the blade 2, wherein the number of variable capacitors is the same as the number of sub-electrode plates.

[0062] A facing area is provided between the first electrode plate 4 and the second electrode plate 5, and the two sub-plates are provided as a differential structure. During the rotation of the fan blade 2, the length of the portion of the dielectric structure 6 located in the facing area changes, thereby changing the capacitance as the rotation angle of the fan blade 2 changes. The capacitance between the first sub-plate 41 and the second electrode plate 5 decreases, while the capacitance between the second sub-plate 42 and the second electrode plate 5 increases, resulting in two capacitance values ​​with different change trends. Compared to the first embodiment of the present disclosure, a differential algorithm is used to enhance the robustness of the capacitance signal and more accurately control the rotation angle of the fan blade 2.

[0063] Specifically, the first electrode plate 4 and the second electrode plate 5 have the same length along the rotation direction of the blade 2, and the two sub-plates have the same length along the rotation direction of the blade 2. In this embodiment, by setting the first electrode plate 4 and the second electrode plate 5 to have the same length along the rotation direction of the blade 2, and the two sub-plates to have the same length along the rotation direction of the blade 2, the accuracy of the differential calculation can be improved when performing the differential calculation.

[0064] In some embodiments of the present disclosure, the number of sub-plates can be set to be greater than or equal to 3, and the spacing between adjacent sub-plates is the same. Specifically, during the rotation of the fan blade 2, the length of the portion of the dielectric structure 6 located in the opposite area changes, whereby the capacitance changes as the rotation angle of the fan blade 2 changes. Among them, the capacitance between each sub-plate decreases or increases, resulting in n capacitance values ​​with different change trends, where n is equal to the number of sub-plates. The use of a differential algorithm to enhance the robustness of the capacitance signal can more accurately control the rotation angle of the fan blade 2.

[0065] FIG5 is another schematic diagram of simulation results of capacitance and blade rotation angle in the adjustable aperture assembly provided by an embodiment of the present disclosure.

[0066] 4 and 5 , FIG5 is a schematic diagram showing the simulation results of the rotation angle of the blade 2 and the capacitance between the first plate 4 and the second plate 5 during the rotation of the blade 2 when a dielectric structure 6 is provided on the blade 2 and the first plate 4 is provided as the first sub-plate 41 and the second sub-plate 42. The horizontal axis represents the rotation angle of the blade 2, and the vertical axis represents the capacitance value of the variable capacitor. The solid line in the figure represents the linear relationship between the capacitance between the first sub-plate 41 and the second plate 5 and the rotation angle of the blade 2, and the dotted line represents the linear relationship between the capacitance between the second sub-plate 42 and the second plate 5 and the rotation angle of the blade 2.

[0067] In this embodiment, the capacitance value of the variable capacitor is 2. In some embodiments of the present disclosure, the number of the plurality of sub-plates may be greater than or equal to 3, and the number of the capacitance values ​​of the variable capacitor is the same as the number of the sub-plates.

[0068] Figure 6 is another partial structural diagram of an adjustable aperture assembly provided in an embodiment of the present disclosure. The adjustable aperture assembly shown in Figure 6 is substantially the same as the adjustable aperture assembly shown in Figures 1 and 2, with the main difference being that, with reference to Figure 6, the adjustable aperture assembly is configured to further include: a connecting portion 8, one end of which is disposed on the surface of the fan blade 2 facing the base 1, wherein the dielectric structure 6 is connected to the other end of the connecting portion 8; and wherein the first electrode plate 4 and the second electrode plate 5 are disposed opposite each other in a direction perpendicular to the surface of the fan blade 2.

[0069] In this embodiment, the dielectric structure 6 is disposed on the surface of the fan blade 2 facing the base 1 , wherein the first electrode plate 4 and the second electrode plate 5 are disposed opposite to each other in a direction perpendicular to the surface of the fan blade 2 .

[0070] Specifically, the capacitance between the first electrode plate 4 and the second electrode plate 5 is calculated as follows: C = εS / 4πkd Formula 2

[0071] Wherein, ε is the dielectric constant of the medium, k is the electrostatic force constant, S is the overlapping area between the first plate and the second plate or the projected area between the first plate and the second plate, and d is the vertical distance between the first plate and the second plate.

[0072] From Equation 2, it can be seen that for two oppositely disposed plates, changing the dielectric constant of the medium between the plates can cause a change in capacitance.

[0073] In this embodiment, a connecting portion 8 is provided on the fan blade 2. One end of the connecting portion 8 is disposed on the surface of the fan blade 2 facing the base 1, and the dielectric structure 6 is connected to the other end of the connecting portion 8. The medium between the first electrode plate 4 and the second electrode plate 5 is air. When the fan blade 2 rotates, the connecting portion 8 and the dielectric structure 6 rotate to the facing area between the first electrode plate 4 and the second electrode plate 5, so that the dielectric structure 6 moves to the facing area. During the rotation of the fan blade 2, the length of the portion of the dielectric structure 6 located in the facing area changes, thereby changing the dielectric constant of the medium between the first electrode plate 4 and the second electrode plate 5.

[0074] According to Formula 2, when the plate areas, the distance between the plates, and the electrostatic force constant of the first plate 4 and the second plate 5 remain unchanged, the capacitance between the first plate 4 and the second plate 5 will change only when the dielectric constant of the medium between the first plate 4 and the second plate 5 changes.

[0075] In this embodiment, the connecting portion 8 is arranged in an "L"-shaped structure, one end of the connecting portion 8 is connected to the fan blade 2, and the other end is connected to the dielectric structure 6. Specifically, the length of the connecting portion 8 is smaller than the vertical distance between the fan blade 2 and the first electrode plate 4, thereby making the volume of the variable aperture assembly smaller.

[0076] In this embodiment, the dielectric structure 6 is an arc-shaped structure along the rotation direction of the blade 2. Specifically, the dielectric structure is set to an arc-shaped structure with the same curvature as the blade 2, which makes the production and assembly processes of the variable aperture assembly simpler.

[0077] In some other embodiments of the present disclosure, the connecting portion 8 and the dielectric structure 6 may also be set to other shapes, as long as the dielectric structure 6 can change the dielectric constant of the medium between the first electrode plate 4 and the second electrode plate 5 during the rotation of the fan blade 2. No limitation is made here.

[0078] Specifically, in order to prevent friction, the thickness of the dielectric structure 6 in the direction perpendicular to the fan blade 2 should be less than the thickness of the facing area between the first electrode plate 4 and the second electrode plate 5. Therefore, when the fan blade 2 rotates, the connecting portion 8 supports the dielectric structure 6 to rotate so that the dielectric structure 6 moves to the facing area. During the rotation of the fan blade 2, the length of the portion of the dielectric structure 6 located in the facing area changes, the dielectric constant of the medium between the first electrode plate 4 and the second electrode plate 5 changes, and the capacitance also changes.

[0079] In this embodiment, the length of the dielectric structure 6 along the rotation direction of the fan blade 2 is smaller than the length of the first electrode plate 4 and the second electrode plate 5, and the lengths of the first electrode plate 4 and the second electrode plate 5 in the facing direction are the same, thereby making the calculation process of the capacitance between the first electrode plate 4 and the second electrode plate 5 simpler.

[0080] In some other embodiments of the present disclosure, there is no limitation on the lengths of the dielectric structure 6 , the first electrode plate 4 , and the second electrode plate 5 , as long as the length of the portion of the dielectric structure 6 located in the facing area changes during the rotation of the fan blade 2 .

[0081] In the above embodiment of the present disclosure, by setting a dielectric structure 6 on the fan blade 2, as the driving component drives the fan blade 2 to rotate, the length of the portion of the dielectric structure 6 set on the fan blade 2 located in the area facing each other between the first electrode plate 4 and the second electrode plate 5 changes, and the capacitance changes accordingly. The processor 7 is configured to obtain the change in capacitance value during the rotation of the fan blade 2 and detect the angle of rotation of the fan blade 2. From this, the relationship between the rotation angle of the fan blade 2 and the capacitance can be obtained. Through the relationship between the two, when the required light value is selected, the corresponding rotation angle of the fan blade 2 is controlled, that is, the opening size of the aperture is controlled. In the embodiment of the present disclosure, the change in capacitance value can be detected without additionally setting a detection magnet in the camera device, and based on the relationship between the rotation angle of the fan blade and the capacitance, when the required light value is selected, the corresponding rotation angle of the fan blade is controlled, the opening size of the aperture is controlled, and the amount of light entering is further controlled. The dielectric structure provided in the embodiment of the present disclosure is set on the fan blade and no longer occupies additional space.

[0082] FIG7 is a schematic structural diagram of an imaging device provided by an embodiment of the present disclosure.

[0083] Referring to Figure 7 , another embodiment of the present disclosure provides an imaging device comprising: a lens and an adjustable aperture assembly, such as that described above, for controlling the aperture of the lens. Since a plurality of blades 2 are circumferentially spaced about a through hole, and one end of each blade 2 is rotatably connected to a base 1 , the plurality of blades 2 form an aperture 9 directly opposite the through hole. Therefore, the rotation angle of the blades 2 affects the amount of light entering the imaging device.

[0084] Another aspect of the embodiments of the present disclosure provides an electronic device, including: the adjustable aperture assembly as described above, or the camera device as described above.

[0085] Specifically, the electronic device may include any one of the following: a mobile phone, a tablet computer, and a camera and a video camera.

[0086] Those skilled in the art will appreciate that the above-described embodiments are specific examples for implementing the present disclosure, and that in actual applications, various changes in form and detail may be made thereto without departing from the spirit and scope of the present disclosure. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be subject to the scope defined in the claims.

Claims

1. An adjustable aperture assembly, comprising: A base (1), wherein the base (1) has a through hole for accommodating a lens; A plurality of fan blades (2), the plurality of fan blades (2) being arranged at intervals in the circumferential direction around the through hole, and one end of the fan blade (2) being rotatably connected to the base (1), and the plurality of fan blades (2) forming an aperture directly facing the through hole; A driving component (3), the driving component (3) being used to drive the fan blades (2) to rotate so as to adjust the size of the aperture; At least one of the fan blades (2) has a corresponding variable capacitor, the variable capacitor comprising: a first electrode plate (4) and a second electrode plate (5) facing the fan blade (2), and a facing area between the first electrode plate (4) and the second electrode plate (5); a dielectric structure (6), the dielectric structure (6) being arranged on the fan blade (2), the fan blade (2) rotating to drive the dielectric structure (6) to move, so that the dielectric structure (6) moves to the facing area, and during the rotation of the fan blade (2), the length of the portion of the dielectric structure (6) located in the facing area changes; A processor (7), wherein the processor (7) is configured to obtain a capacitance change of the variable capacitor during rotation of the fan blade (2), and detect an angle of rotation of the fan blade (2) based on the capacitance change.

2. The adjustable aperture assembly according to claim 1, wherein: The dielectric structure (6) is arranged on the surface of the fan blade (2) facing the base (1); wherein the first electrode plate (4) and the second electrode plate (5) are arranged opposite to each other in a direction parallel to the surface of the fan blade (2).

3. The adjustable aperture assembly according to claim 1, wherein: The adjustable aperture assembly also includes: A connecting portion (8), one end of the connecting portion (8) being arranged on the fan blade (2) toward the base (1) On the surface, wherein the dielectric structure (6) is connected to the other end of the connecting portion (8); Wherein, the first pole plate (4) and the second pole plate (5) are arranged opposite to each other in a direction perpendicular to the surface of the fan blade (2).

4. The adjustable aperture assembly according to any one of claims 1 to 3, wherein: The dielectric structure (6) is an arc-shaped structure along the rotation direction of the fan blade (2).

5. The adjustable aperture assembly according to any one of claims 1 to 3, wherein: The first electrode plate (4) is a continuous structure, and the capacitance value of the variable capacitor is 1.

6. The adjustable aperture assembly according to any one of claims 1 to 3, wherein: The first electrode plate comprises: At least two sub-plates are arranged at intervals along the rotation direction of the fan blade (2), wherein the number of capacitance values ​​of the variable capacitor is the same as the number of the sub-plates.

7. The adjustable aperture assembly according to claim 6, wherein: The number of the sub-plates is greater than or equal to 3, and the spacing between adjacent sub-plates is the same.

8. The adjustable aperture assembly according to claim 1, wherein: The processor (7) is also configured to store a correspondence between the capacitance value of the variable capacitor and the rotation angle of the fan blade (2), and detect the rotation angle of the fan blade (2) based on the correspondence and the change in the capacitance value.

9. A camera device, comprising: Lens; An adjustable aperture assembly according to any one of claims 1 to 8 for controlling the aperture of the lens.

10. An electronic device comprising: The adjustable aperture assembly as claimed in any one of claims 1 to 8, or the camera device as claimed in claim 9.

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