Prism motor, camera module, and camera device
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2026-08-13
Smart Images
Figure CN2025106013_13082026_PF_FP_ABST
Abstract
Description
Prism motor, camera module and camera equipment Cross-referencing
[0001] This disclosure claims priority to Chinese patent application No. 2025201875663, filed on February 6, 2025, entitled "Prism Motor, Camera Module and Camera Equipment", which is incorporated herein by reference in its entirety. Technical Field
[0002] This disclosure relates to the field of camera technology, and in particular to a prism motor, camera module, and camera device. Background Technology
[0003] Currently, periscope camera modules typically use a prism mounted on a prism motor to refract incident light. By folding the incident light, the focal length of the camera module is extended, thereby enhancing its zoom capability. When using the camera module for image acquisition, the propagation angle of the incident light can be changed by rotating the prism carrier in the prism motor, thus altering the imaging effect of the camera module. The rotation angle of the prism carrier is usually detected by a built-in Hall sensor.
[0004] However, Hall effect sensors require the use of magnets to measure angles. Integrating the Hall sensor and magnets inside the prism motor occupies a significant amount of internal space, hindering miniaturization. Furthermore, Hall effect sensors are susceptible to external environmental influences such as magnetic fields, leading to inaccurate detection of the prism carrier's rotation angle and consequently lower reliability of the prism motor.
[0005] Furthermore, most current prism motors only detect the rotation angle of the prism carrier on a single axis (Y-axis) or a dual axis (X-axis and Y-axis), limiting them to single-axis or dual-axis image stabilization, which is only suitable for still photography. With increasing user demands for dynamic shooting and telephoto capabilities, it's necessary to add rotation angle detection along the optical axis of the prism motor (Z-axis). This would give the prism motor three-axis (X, Y, and Z-axis) rotation angle detection, enabling three-axis image stabilization. This allows for constant adjustment of the light angle, resulting in smoother footage and better handling of complex camera shake in dynamic scenes.
[0006] In summary, there is an urgent need for a prism motor that is small in size, highly reliable, and capable of detecting the angle of the prism carrier's three-axis rotation. Summary of the Invention
[0007] This disclosure provides a prism motor and a camera device, which can at least reduce the size of the prism motor, improve the reliability of the prism motor, and also realize the angle detection of the three-axis rotation of the prism carrier.
[0008] According to some embodiments of this disclosure, one aspect of this disclosure provides a prism motor, including: a base; a prism carrier rotatably disposed on the base; a first electrode assembly, the first electrode assembly including a first fixed electrode plate and a first movable electrode plate disposed parallel to a first rotation axis, the first fixed electrode plate being located on the base, the first movable electrode plate being located on the prism carrier, the first fixed electrode plate and the first movable electrode plate forming a first capacitance signal, and when the prism carrier rotates about the first rotation axis, one of the facing area and the distance between the first fixed electrode plate and the first movable electrode plate increases, and the other decreases; a second electrode assembly, the second electrode assembly including a second fixed electrode plate and a second movable electrode plate disposed parallel to a second rotation axis, the second fixed electrode plate being located on the base, the second movable electrode plate being located on the prism carrier, the second fixed electrode plate and the second movable electrode plate forming a second capacitance signal, and when the prism carrier rotates about the first rotation axis, the facing area and the distance between the first fixed electrode plate and the first movable electrode plate increase, and the distance between them decreases; and a second electrode assembly, the second electrode assembly including a second fixed electrode plate and a second movable electrode plate disposed parallel to a second rotation axis, the second fixed electrode plate being located on the base, the second movable electrode plate being located on the prism carrier, the second fixed electrode plate and the second movable electrode plate forming a second capacitance signal, and when the prism carrier rotates about the first rotation axis, the facing area and the distance between them increase, and the distance between them decreases. When the prism carrier rotates around the second rotation axis, one of the facing area and distance between the second fixed electrode plate and the second moving electrode plate increases, and the other decreases; a third electrode plate assembly, the third electrode plate assembly includes a third fixed electrode plate and a third moving electrode plate arranged parallel to the third rotation axis, the third fixed electrode plate is located on the base, the third moving electrode plate is located on the prism carrier, the third fixed electrode plate and the third moving electrode plate form a third capacitance signal, and when the prism carrier rotates around the third rotation axis, one of the facing area and distance between the third fixed electrode plate and the third moving electrode plate increases, and the other decreases; a processing unit, the processing unit determines the rotation angle of the prism carrier based on the changes of the first capacitance signal, the second capacitance signal and the third capacitance signal when the prism carrier rotates; wherein, the first rotation axis, the second rotation axis and the third rotation axis are mutually perpendicular.
[0009] In some embodiments, the first electrode assembly includes two first moving electrode plates and two first fixed electrode plates, one first moving electrode plate and one first fixed electrode plate are disposed opposite to each other, and the other first moving electrode plate and the other first fixed electrode plate are disposed opposite to each other, with the two first moving electrode plates and the two first fixed electrode plates being symmetrically arranged along the first rotation axis; the second electrode assembly includes two second moving electrode plates and two second fixed electrode plates, one second moving electrode plate and one second fixed electrode plate are disposed opposite to each other, and the other second moving electrode plate and the other second fixed electrode plate are disposed opposite to each other, with the two second moving electrode plates and the two second fixed electrode plates being symmetrically arranged along the second rotation axis; the third electrode assembly includes two third moving electrode plates and two third fixed electrode plates, one third moving electrode plate and one third fixed electrode plate are disposed opposite to each other, and the other third moving electrode plate and the other third fixed electrode plate are disposed opposite to each other, with the two third moving electrode plates and the two third fixed electrode plates being symmetrically arranged along the third rotation axis.
[0010] In some embodiments, in a direction parallel to the first rotation axis, the cross-sections of the first moving electrode and the first fixed electrode are both rectangular, and the long sides of both the first moving electrode and the first fixed electrode extend along the first rotation axis; in a direction parallel to the second rotation axis, the cross-sections of the second moving electrode and the second fixed electrode are both rectangular, and the long sides of both the second moving electrode and the second fixed electrode extend along the second rotation axis; in a direction parallel to the third rotation axis, the cross-sections of the third moving electrode and the third fixed electrode are both rectangular, and the long sides of both the third moving electrode and the third fixed electrode extend along the third rotation axis.
[0011] In some embodiments, the projections of the first moving electrode and the first fixed electrode onto the plane containing the first rotation axis and the third rotation axis satisfy the following conditions: the long side of the first moving electrode is smaller than the long side of the first fixed electrode, and the distance between the short side of the first moving electrode and the third rotation axis is smaller than the distance between the short side of the first fixed electrode and the third rotation axis; the projections of the second moving electrode and the second fixed electrode onto the plane containing the second rotation axis and the third rotation axis satisfy the following conditions: the long side of the second moving electrode is smaller than the long side of the second fixed electrode, and the distance between the short side of the second moving electrode and the third rotation axis is smaller than the distance between the short side of the second fixed electrode and the third rotation axis; the projections of the third moving electrode and the third fixed electrode onto the plane containing the first rotation axis and the third rotation axis satisfy the following conditions: the long side of the third moving electrode is smaller than the long side of the third fixed electrode, and the distance between the short side of the third moving electrode and the first rotation axis is smaller than the distance between the short side of the third fixed electrode and the first rotation axis.
[0012] In some embodiments, the projections of the first moving electrode and the first fixed electrode onto the plane containing the first rotation axis and the third rotation axis satisfy the following: the maximum distance between the first moving electrode and the first rotation axis is greater than the maximum distance between the first fixed electrode and the first rotation axis, and the minimum distance between the first moving electrode and the first rotation axis is greater than the minimum distance between the first fixed electrode and the first rotation axis; the projections of the second moving electrode and the second fixed electrode onto the plane containing the second rotation axis satisfy the following: the maximum distance between the second moving electrode and the second rotation axis is greater than the maximum distance between the second fixed electrode and the second rotation axis, and the minimum distance between the second moving electrode and the second rotation axis is greater than the minimum distance between the second fixed electrode and the second rotation axis; the projections of the third moving electrode and the third fixed electrode onto the plane containing the first rotation axis and the third rotation axis satisfy the following: the maximum distance between the third moving electrode and the third rotation axis is greater than the maximum distance between the third fixed electrode and the third rotation axis, and the minimum distance between the third moving electrode and the third rotation axis is greater than the minimum distance between the third fixed electrode and the third rotation axis.
[0013] In some embodiments, the first fixed electrode plate, the second fixed electrode plate, and the third fixed electrode plate are electrically connected to the processing unit, the first moving electrode plate, the second moving electrode plate, and the third moving electrode plate are electrically connected through the prism carrier, and the first moving electrode plate, the second moving electrode plate, and the third moving electrode plate are all electrically connected to the processing unit.
[0014] In some embodiments, the first moving electrode plate, the second moving electrode plate, and the third moving electrode plate are integrally formed with the prism carrier, and the first fixed electrode plate, the second fixed electrode plate, and the third fixed electrode plate are integrally formed with the base.
[0015] In some embodiments, the prism motor further includes: a magnet disposed on the prism carrier; and a coil disposed on the base and connected to the processing unit, wherein the coil drives the magnet to rotate the prism carrier under the control of the processing unit.
[0016] According to some embodiments of this disclosure, another aspect of this disclosure provides a camera module, including a prism motor as described in any of the above embodiments; and a prism disposed on a prism carrier.
[0017] According to some embodiments of this disclosure, another aspect of this disclosure provides a camera device, including the prism motor described in any of the above embodiments, or including the camera module described in the above embodiments.
[0018] The technical solutions provided in this disclosure have at least the following advantages:
[0019] In the technical solution of the prism motor provided in this disclosure embodiment, the prism motor includes: a base; a prism carrier, the prism carrier being rotatably disposed on the base; a first electrode plate assembly, the first electrode plate assembly including a first fixed electrode plate and a first movable electrode plate disposed parallel to a first rotation axis, the first fixed electrode plate being located on the base, the first movable electrode plate being located on the prism carrier, the first fixed electrode plate and the first movable electrode plate forming a first capacitance signal, and when the prism carrier rotates around the first rotation axis, one of the facing area and the distance between the first fixed electrode plate and the first movable electrode plate increases, and the other decreases; a second electrode plate assembly, the second electrode plate assembly including a second fixed electrode plate and a second movable electrode plate disposed parallel to a second rotation axis, the second fixed electrode plate being located on the base, the second movable electrode plate being located on the prism carrier, the second fixed electrode plate and the second movable electrode plate forming a second capacitance signal, and when the prism carrier rotates around the first rotation axis, the facing area and the distance between the first fixed electrode plate and the first movable electrode plate increase, and the distance between the first fixed electrode plate and the first movable electrode plate decreases; and a second electrode plate assembly, the second electrode plate assembly including a second fixed electrode plate and a second movable electrode plate disposed parallel to a second rotation axis, the second fixed electrode plate being located on the base, the second movable electrode plate being located on the prism carrier, the second fixed electrode plate and the second movable electrode plate forming a second capacitance signal, and when the prism carrier rotates around the first rotation axis, the facing area and the distance between the first fixed electrode plate and the first movable electrode plate increase, and the distance between the first fixed electrode plate and the first movable electrode plate decreases. When the prism carrier rotates around the second rotation axis, one of the facing area and distance between the second fixed electrode plate and the second moving electrode plate increases, and the other decreases; the third electrode plate assembly includes a third fixed electrode plate and a third moving electrode plate arranged parallel to the third rotation axis. The third fixed electrode plate is located on the base, and the third moving electrode plate is located on the prism carrier. The third fixed electrode plate and the third moving electrode plate form a third capacitance signal, and when the prism carrier rotates around the third rotation axis, one of the facing area and distance between the third fixed electrode plate and the third moving electrode plate increases, and the other decreases; the processing unit determines the angle of rotation of the prism carrier based on the changes in the first capacitance signal, the second capacitance signal, and the third capacitance signal when the prism carrier rotates; wherein the first rotation axis, the second rotation axis, and the third rotation axis are all perpendicular to each other.
[0020] In the prism motor provided in this embodiment, three electrode assemblies—a first electrode assembly, a second electrode assembly, and a third electrode assembly—are used to detect the rotation angles of the prism carrier around the first, second, and third rotation axes, respectively, enabling three-axis rotation angle detection of the prism carrier. Furthermore, using smaller electrode assemblies instead of larger Hall effect sensors to detect the rotation angle of the prism carrier reduces the overall size of the prism motor. Determining the rotation angle of the prism carrier based on changes in the capacitance signal generated by the electrode assemblies is less susceptible to interference from external environments such as magnetic fields, resulting in high reliability of the prism motor.
[0021] Furthermore, according to the capacitance signal calculation formula, the capacitance signal formed by the electrode assembly is positively correlated with the facing area of the fixed and moving electrodes in the assembly, and negatively correlated with the distance between them. When the prism carrier rotates around a rotation axis, the facing area and distance between the fixed and moving electrodes in the electrode assembly that detects the rotation axis change simultaneously. The change in facing area and distance have the same effect on the capacitance signal; that is, both changes in facing area and distance lead to an increase in capacitance signal, or both lead to a decrease in capacitance signal. Therefore, changing both facing area and distance simultaneously, compared to changing only one of them, results in a larger amplitude change in capacitance signal under the same rotation angle. This makes the prism motor more sensitive to the prism carrier's angular rotation and improves the reliability of the prism motor's angle detection. Attached Figure Description
[0022] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 is a schematic diagram of a prism motor carrying a prism according to an embodiment of this disclosure;
[0024] Figure 2 is a schematic diagram of a structure of a first fixed electrode plate, a second fixed electrode plate, and a third fixed electrode plate provided in an embodiment of this disclosure.
[0025] Figure 3 is a schematic diagram of a structure of the first moving electrode plate, the second moving electrode plate and the third moving electrode plate provided in an embodiment of this disclosure;
[0026] Figure 4 is a schematic diagram of a first electrode plate assembly provided in an embodiment of this disclosure;
[0027] Figure 5 is a schematic diagram of a second electrode plate assembly provided in an embodiment of this disclosure;
[0028] Figure 6 is a schematic diagram of a third electrode plate assembly provided in an embodiment of this disclosure;
[0029] Figure 7 is a schematic diagram of a structure connecting the first electrode plate assembly and the processing unit;
[0030] Figure 8 is a schematic diagram of another structure of the first, second, and third fixed electrode plates provided in an embodiment of this disclosure;
[0031] Figure 9 is a schematic diagram of another structure of the first moving electrode plate, the second moving electrode plate and the third moving electrode plate provided in the embodiments of this disclosure;
[0032] Figure 10 is a partial structural schematic diagram of a prism motor provided in an embodiment of this disclosure;
[0033] Figure 11 is a schematic diagram of another partial structure of the prism motor provided in an embodiment of this disclosure;
[0034] Figure 12 is a schematic diagram of a prism provided in an embodiment of this disclosure;
[0035] Figure 13 is a schematic diagram of a camera module provided in an embodiment of this disclosure. Detailed Implementation
[0036] As can be seen from the background technology, there is an urgent need for a prism motor that is small in size, highly reliable, and capable of detecting three-axis rotation angles.
[0037] This disclosure provides a prism motor and a camera device. The prism motor employs three electrode assemblies—a first electrode assembly, a second electrode assembly, and a third electrode assembly—to detect the rotation angles of a prism carrier around a first, second, and third rotation axis, respectively, enabling three-axis rotation angle detection. Furthermore, using smaller electrode assemblies instead of larger Hall effect sensors to detect the prism carrier's rotation angle reduces the overall size of the prism motor. Determining the prism carrier's rotation angle based on changes in the capacitance signal generated by the electrode assemblies is less susceptible to interference from external environments such as magnetic fields, resulting in high reliability of the prism motor.
[0038] Furthermore, when the prism carrier rotates around a rotation axis, the facing area and distance between the fixed and moving plates in the electrode assembly that detects the rotation axis change simultaneously. The change in facing area and distance has the same effect on the capacitance signal; that is, both changes in facing area and distance lead to an increase in capacitance signal, or both lead to a decrease in capacitance signal. Therefore, changing both facing area and distance simultaneously, compared to changing only one of them, results in a larger amplitude change in capacitance signal under the same rotation angle. This makes the prism motor more sensitive to the angular rotation of the prism carrier, improving the reliability of the prism motor's angle detection.
[0039] In the description of the embodiments of this disclosure, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.
[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0041] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0042] In the description of the embodiments of this disclosure, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).
[0043] In the description of the embodiments of this disclosure, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.
[0044] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.
[0045] In the description of embodiments of this disclosure, when a component “includes” another component, other components are not excluded unless otherwise stated, and other components may be further included. Furthermore, when a component such as a layer, film, region, or plate is referred to as being “on / located” on another component, it may be “directly on” the other component (i.e., located on the surface of the other component with no other components between them), or another component may be present therein.
[0046] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the disclosure. However, the technical solutions claimed in this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.
[0047] Figure 1 is a schematic diagram of a prism motor carrying a prism according to an embodiment of the present disclosure. Figure 2 is a schematic diagram of a first fixed electrode plate, a second fixed electrode plate, and a third fixed electrode plate according to an embodiment of the present disclosure. Figure 3 is a schematic diagram of a first moving electrode plate, a second moving electrode plate, and a third moving electrode plate according to an embodiment of the present disclosure. Figure 4 is a schematic diagram of a first electrode plate assembly according to an embodiment of the present disclosure. Figure 5 is a schematic diagram of a second electrode plate assembly according to an embodiment of the present disclosure. Figure 6 is a schematic diagram of a third electrode plate assembly according to an embodiment of the present disclosure. Figure 7 is a schematic diagram of a connection between the first electrode plate assembly and a processing unit. In Figure 1, point O is the rotation center of the prism carrier.
[0048] Referring to Figures 1 to 7, the prism motor includes: a base 100; a prism carrier 101, rotatably mounted on the base 100; and a first electrode assembly 102, comprising a first fixed electrode 112 and a first movable electrode 122 arranged parallel to a first rotation axis X. The first fixed electrode 112 is located on the base 100, and the first movable electrode 122 is located on the prism carrier 101. The first fixed electrode 112 and the first movable electrode 122 form a first capacitance signal, and in... When the prism carrier 101 rotates around the first rotation axis X, one of the facing area and the distance between the first fixed electrode plate 112 and the first moving electrode plate 122 increases, while the other decreases. The second electrode plate assembly 103 includes a second fixed electrode plate 113 and a second moving electrode plate 123 arranged parallel to the second rotation axis Y. The second fixed electrode plate 113 is located on the base 100, and the second moving electrode plate 123 is located on the prism carrier 101. The second fixed electrode plate 113 and the second moving electrode plate 123 form a second capacitor. The signal, and when the prism carrier 101 rotates about the second rotation axis Y, one of the facing area and distance between the second fixed electrode plate 113 and the second moving electrode plate 123 increases, and the other decreases; the third electrode plate assembly 104 includes a third fixed electrode plate 114 and a third moving electrode plate 124 arranged parallel to the third rotation axis Z, the third fixed electrode plate 114 is located on the base 100, and the third moving electrode plate 124 is located on the prism carrier 101, the third fixed electrode plate 114 and the third moving electrode plate 124 form a shape The third capacitor signal is generated, and when the prism carrier 101 rotates around the third rotation axis Z, one of the facing area and the distance between the third fixed plate 114 and the third moving plate 124 increases and the other decreases; the processing unit 105 determines the rotation angle of the prism carrier 101 based on the changes of the first capacitor signal, the second capacitor signal and the third capacitor signal when the prism carrier 101 rotates; wherein the first rotation axis X, the second rotation axis Y and the third rotation axis Z are perpendicular to each other.
[0049] The base 100 is used to provide support for other components of the prism motor.
[0050] The prism carrier 101 is used to hold the prism.
[0051] The first electrode assembly 102, the second electrode assembly 103, and the third electrode assembly 104 are used to detect the rotation angles of the prism carrier 101 around the first rotation axis X, the second rotation axis Y, and the third rotation axis Z, respectively. Specifically, the physical formula for a parallel plate capacitor is: C = εS / 4πkd. Where ε is the dielectric constant of the medium, determined by the medium between the plates, such as air or water. K is the electrostatic constant, also known as the Coulomb constant, representing the force between two point charges, each with a charge of 1C, when they are 1m apart in a vacuum; the force is 8.987551 × 10⁻⁶. 9N, i.e., k = 8.987551 × 10 9 N·m 2 / C; S is the area (projected area) of the two plates facing each other; d is the perpendicular distance between the two plates; π represents pi. As can be seen from the formula, for two capacitor plates, changing the area of the two plates facing each other and the distance between them can change the capacitance. Based on this principle, a prism motor plate structure was designed using changes in plate area, distance, or a combination of both. This structure can be used to detect the rotation angle of the prism carrier 101 along the X, Y, and Z axes, thereby achieving control of the prism rotation, i.e., the prism's three-axis anti-shake function without dead angles.
[0052] In other words, the capacitance signal formed by the electrode assembly is positively correlated with the facing area of the fixed and moving electrodes and negatively correlated with the distance between them. Therefore, when the prism carrier 101 rotates around the first rotation axis X, one of the facing area and distance between the first fixed electrode 112 and the first moving electrode 122 increases, while the other decreases, causing a change in the first capacitance signal; when the prism carrier 101 rotates around the second rotation axis Y, one of the facing area and distance between the second fixed electrode 113 and the second moving electrode 123 increases, while the other decreases, causing a change in the second capacitance signal; when the prism carrier 101 rotates around the third rotation axis Z, one of the facing area and distance between the third fixed electrode 114 and the third moving electrode 124 increases, while the other decreases, causing a change in the third capacitance signal. Therefore, the rotation angle of the prism carrier 101 around the three rotation axes can be determined by utilizing the changes in the first capacitance signal formed by the first electrode assembly 102, the second capacitance signal formed by the second electrode assembly 103, and the third capacitance signal formed by the third electrode assembly 104.
[0053] In some embodiments, the first electrode assembly 102 includes two first movable electrode plates 122 and two first fixed electrode plates 112, with one first movable electrode plate 122 opposite to one first fixed electrode plate 112, and the other first movable electrode plate 122 opposite to the other first fixed electrode plate 112. The two first movable electrode plates 122 and the two first fixed electrode plates 112 are symmetrically arranged along the first rotation axis X-axis. The second electrode assembly 103 includes two second movable electrode plates 123 and two second fixed electrode plates 113, with one second movable electrode plate 123 opposite to one second fixed electrode plate 113, and the other first movable electrode plate 122 opposite to the other first fixed electrode plate 112. The moving electrode 123 is disposed opposite to another second fixed electrode 113, and the two second moving electrode 123 are symmetrically disposed along the second rotation axis Y-axis, and the two second fixed electrode 113 are symmetrically disposed along the second rotation axis Y-axis; the third electrode assembly 104 includes two third moving electrode 124 and two third fixed electrode 114, and one third moving electrode 124 is disposed opposite to one third fixed electrode 114, and the other third moving electrode 124 is disposed opposite to the other third fixed electrode 114, and the two third moving electrode 124 are symmetrically disposed along the third rotation axis Z-axis, and the two third fixed electrode 114 are symmetrically disposed along the third rotation axis Z-axis.
[0054] In the first electrode assembly 102, the first capacitance signal formed by one first fixed electrode 112 and the oppositely arranged first moving electrode 122 is C1, and the first capacitance signal formed by the other first fixed electrode 112 and the oppositely arranged first moving electrode 122 is C2. When the prism carrier 101 rotates around the first rotation axis X, C1 and C2 will show negative changes, that is, C1 decreases while C2 increases, or C1 increases while C2 decreases. Therefore, the results of the two first capacitance signals can be differentially processed by (C1-C2) / (C1+C2) to offset the influence of environmental factors on the two first capacitance signals, thereby improving the reliability of the prism motor detection angle.
[0055] Similarly, the second electrode assembly 103 includes two second fixed electrodes 113 and two second moving electrodes 123, which can perform differential processing on the results of the two second capacitor signals to improve the reliability of the prism motor. The third electrode assembly 104 includes two third fixed electrodes 114 and two third moving electrodes 124, which can perform differential processing on the results of the two third capacitor signals to improve the reliability of the prism motor.
[0056] In some embodiments, in a direction parallel to the first rotation axis X, the cross-sections of the first moving electrode 122 and the first fixed electrode 112 are both rectangular, and the long sides of both the first moving electrode 122 and the first fixed electrode 112 extend along the first rotation axis X; in a direction parallel to the second rotation axis Y, the cross-sections of the second moving electrode 123 and the second fixed electrode 113 are both rectangular, and the long sides of both the second moving electrode 123 and the second fixed electrode 113 extend along the second rotation axis Y; in a direction parallel to the third rotation axis Z, the cross-sections of the third moving electrode 124 and the third fixed electrode 114 are both rectangular, and the long sides of both the third moving electrode 124 and the third fixed electrode 114 extend along the third rotation axis Z.
[0057] Compared to the scheme where the short sides of the first moving electrode 122 and the first fixed electrode 112 both extend along the first rotation axis X, the scheme where the long sides of the first moving electrode 122 and the first fixed electrode 112 both extend along the first rotation axis X allows the prism carrier 101 to rotate around the first rotation axis X by the same angle. This results in a larger change in the facing area of the first moving electrode 122 and the first fixed electrode 112, leading to a larger change in the first capacitance signal. This makes the detection of the angle of rotation of the prism carrier 101 around the first rotation axis X more sensitive, thereby improving the reliability of the prism motor's angle detection.
[0058] Similarly, the long sides of both the second moving electrode 123 and the second fixed electrode 113 extend along the second rotation axis Y, resulting in a larger amplitude of change in the second capacitor signal. This makes the detection of the angle of rotation of the prism carrier 101 around the second rotation axis Y more sensitive, thereby improving the reliability of the prism motor's angle detection. The long sides of both the third moving electrode 124 and the third fixed electrode 114 extend along the third rotation axis Z, resulting in a larger amplitude of change in the third capacitor signal. This makes the detection of the angle of rotation of the prism carrier 101 around the third rotation axis Z more sensitive, thereby improving the reliability of the prism motor's angle detection.
[0059] Referring to Figures 4 to 6, in some embodiments, the projections of the first moving electrode 122 and the first fixed electrode 112 onto the plane containing the first rotation axis X and the third rotation axis Z satisfy the following: the long side of the first moving electrode 122 is smaller than the long side of the first fixed electrode 112, and the distance L between the short side of the first moving electrode 122 and the third rotation axis Z is... 11 The distance L between the short side of the first fixed plate 112 and the third rotation axis Z is smaller than that between the two plates. 12 This configuration is intended to minimize the change in the facing area between the first moving electrode plate 122 and the first fixed electrode plate 112 when the prism carrier 101 rotates around the second rotation axis Y and / or the third rotation axis Z. In other words, it can reduce the impact of the prism carrier 101 rotating around the second rotation axis Y and / or the third rotation axis Z on the first capacitor signal.
[0060] The projections of the second moving electrode 123 and the second fixed electrode 113 onto the plane containing the second rotation axis Y and the third rotation axis Z satisfy the following conditions: the longer side of the second moving electrode 123 is less than the longer side of the second fixed electrode 113, and the distance L between the shorter side of the second moving electrode 123 and the third rotation axis Z is... 21 The distance L between the short side of the second stationary plate 113 and the third rotation axis Z is smaller than that between the two plates. 22 This configuration is intended to minimize the change in the facing area between the second moving electrode plate 123 and the second fixed electrode plate 113 when the prism carrier 101 rotates around the first rotation axis X and / or the third rotation axis Z. In other words, it can reduce the impact of the prism carrier 101 rotating around the first rotation axis X and / or the third rotation axis Z on the second capacitor signal.
[0061] The projections of the third moving electrode 124 and the third fixed electrode 114 onto the plane containing the first rotation axis X and the third rotation axis Z satisfy the following conditions: the longer side of the third moving electrode 124 is less than the longer side of the third fixed electrode 114, and the distance L between the shorter side of the third moving electrode 124 and the first rotation axis X is... 31 The distance L between the short side of the third stationary plate 114 and the first rotation axis X is smaller than that between the stationary plate 114 and the first rotation axis X. 32 This configuration is intended to minimize the change in the facing area between the third moving electrode plate 124 and the third fixed electrode plate 114 when the prism carrier 101 rotates around the first rotation axis X and / or the second rotation axis Y. In other words, it can reduce the impact of the prism carrier 101 rotating around the first rotation axis X and / or the second rotation axis Y on the signal of the third capacitor.
[0062] In addition, the first fixed electrode plate 112 and the first moving electrode plate 122 are both parallel to the center line of the short side and coincide with the third rotation axis Z; the second fixed electrode plate 113 and the second moving electrode plate 123 are both parallel to the center line of the short side and coincide with the third rotation axis Z; the third fixed electrode plate 114 and the corresponding third moving electrode plate 124 are both parallel to the center line of the short side and coincide with the first rotation axis X.
[0063] Referring again to Figures 4 to 6, in some embodiments, the projections of the first moving electrode 122 and the first fixed electrode 112 onto the plane containing the first rotation axis X and the third rotation axis Z satisfy the following: the maximum distance L between the first moving electrode 122 and the first rotation axis X. 13 Greater than the maximum distance L between the first fixed plate 112 and the first rotation axis X 14 And the minimum distance L between the first moving electrode plate 122 and the first rotating axis X 15 The distance L is greater than the minimum distance between the first fixed plate 112 and the first rotation axis X. 16 This arrangement is to ensure that when the prism carrier 101 rotates around the first rotation axis X, one of the facing areas and the distance between the first fixed electrode plate 112 and the first moving electrode plate 122 increases while the other decreases.
[0064] Referring to Figures 4 and 7, taking the first electrode assembly 102 and the first rotating shaft X as an example, the maximum distance L between the first moving electrode 122 and the first rotating shaft X is... 13 Greater than the maximum distance L between the first fixed plate 112 and the first rotation axis X 14 And the minimum distance L between the first moving electrode plate 122 and the first rotating axis X 15 The distance L is greater than the minimum distance between the first fixed plate 112 and the first rotation axis X. 16 With this configuration, the first moving electrode plate 122 and the corresponding first fixed electrode plate 112 are partially staggered. When the prism carrier 101 rotates clockwise around the first rotation axis X, it ensures that the facing area between the first fixed electrode plate 112 and the first moving electrode plate 122 on the left side of Figure 4 decreases while the distance between them increases, while the facing area between the first fixed electrode plate 112 and the first moving electrode plate 122 on the right side increases while the distance between them decreases. When the prism carrier 101 rotates counterclockwise around the first rotation axis X, it ensures that the facing area between the first fixed electrode plate 112 and the first moving electrode plate 122 on the left side of Figure 4 increases while the distance between them decreases, while the facing area between the first fixed electrode plate 112 and the first moving electrode plate 122 on the right side decreases while the distance between them increases.
[0065] In some examples, taking the positions of the first fixed electrode plate 112 and the first moving electrode plate 122 in Figure 7 as the initial positions, the rotation angle of the first fixed electrode plate 112 and the first moving electrode plate 122 around the first rotation axis X clockwise or counterclockwise is usually less than or equal to 3°; the maximum distance L between the first moving electrode plate 122 and the first rotation axis X is... 13 The maximum distance L between the first fixed plate 112 and the first rotation axis X 14 The difference is 0.2mm; the minimum distance L between the first moving electrode plate 122 and the first rotating shaft X. 15 The minimum distance L between the first fixed plate 112 and the first rotation axis X 16 The difference is 0.2 mm, that is, L 13 -L 14 ≤0.2mm, L 15 -L 16 ≤0.2mm.
[0066] The projections of the second moving electrode 123 and the second fixed electrode 113 onto the plane containing the second rotation axis Y and the third rotation axis Z satisfy the following: the maximum distance L between the second moving electrode 123 and the second rotation axis Y. 23 Greater than the maximum distance L between the second stationary plate 113 and the second rotation axis Y 24 And the minimum distance L between the second moving electrode plate 123 and the second rotation axis Y 25 The distance L between the second stationary plate 113 and the second rotation axis Y is greater than the minimum distance between them. 26This arrangement is to ensure that when the prism carrier 101 rotates around the second rotation axis Y, one of the facing areas and the distance between the second fixed electrode plate 113 and the second moving electrode plate 123 increases while the other decreases.
[0067] The projections of the third moving electrode 124 and the third fixed electrode 114 onto the plane containing the first rotation axis X and the third rotation axis Z satisfy the following condition: the maximum distance L between the third moving electrode 124 and the third rotation axis Z. 33 Greater than the maximum distance L between the third stationary plate 114 and the third rotation axis Z 34 And the minimum distance L between the third moving electrode plate 124 and the third rotating axis Z 35 The distance L is greater than the minimum distance between the third stationary plate 114 and the third rotation axis Z. 36 This arrangement is to ensure that when the prism carrier 101 rotates around the third rotation axis Z, one of the facing areas and the distance between the third fixed electrode plate 114 and the third moving electrode plate 124 increases while the other decreases.
[0068] Referring to Figures 1, 3, and 7, in some embodiments, the first fixed electrode plate 112, the second fixed electrode plate 113, and the third fixed electrode plate 114 are electrically connected to the processing unit 105, and the first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 are electrically connected through the prism carrier 101. The first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 are all electrically connected to the processing unit 105.
[0069] The prism carrier 101 can be made of a conductive material, and the first moving electrode 122, the second moving electrode 123 and the third moving electrode 124 are electrically connected through the prism carrier 101.
[0070] In other embodiments, the prism carrier 101 is made of an insulating material. The prism motor includes connecting conductors, and the first moving electrode 122, the second moving electrode 123, and the third moving electrode 124 are connected by the connecting conductors.
[0071] In some embodiments, the prism motor further includes a deformable conductor (not shown) that electrically connects the first moving electrode 122, the second moving electrode 123 and the third moving electrode 124 to the processing unit 105.
[0072] Deformable conductors include flexible conductors and elastic conductors. Since the first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 are disposed on the prism carrier 101 which rotates relative to the base 100, and the processing unit 105 is disposed on the base 100, the use of deformable conductors to connect the first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 with the processing unit 105 can ensure that the connection between the first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 and the processing unit 105 is not interrupted.
[0073] In addition, when the first moving electrode 122, the second moving electrode 123 and the third moving electrode 124 are connected to the processing unit 105 using an elastic conductor, the elastic return prism carrier 101 of the elastic conductor can also be utilized.
[0074] In some embodiments, the first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 can be integrally formed with the prism carrier 101, and the first fixed electrode plate 112, the second fixed electrode plate 113, and the third fixed electrode plate 114 can be integrally formed with the base 100. This configuration facilitates the assembly and mass production of the prism motor.
[0075] In other embodiments, the first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 may not be integrally formed with the prism carrier 101. Instead, the first moving electrode plate 122, the second moving electrode plate 123, and the third moving electrode plate 124 are connected via a flexible circuit board and then attached to the prism carrier 101. Similarly, the first fixed electrode plate 112, the second fixed electrode plate 113, and the third fixed electrode plate 114 may not be integrally formed with the base 100.
[0076] Referring again to Figure 1, the base 100 includes a bottom surface 110 and a first side surface 110, a second side surface 130, and a third side surface 140 that are perpendicularly connected to the bottom surface 110. The direction of the first side surface 110 pointing towards the second side surface 130 is parallel to the second rotation axis Y.
[0077] Referring to Figures 1 and 2, the first stationary plate 112 can be disposed on the first side 110, and the third stationary plate 114 can be disposed on the third side 140. Alternatively, the first stationary plate 112 can be disposed on the third side 140, and the third stationary plate 114 can be disposed on the first side 110.
[0078] Figure 8 is a schematic diagram of another structure of the first fixed electrode plate, the second fixed electrode plate and the third fixed electrode plate provided in the embodiments of this disclosure, and Figure 9 is a schematic diagram of another structure of the first moving electrode plate, the second moving electrode plate and the third moving electrode plate provided in the embodiments of this disclosure.
[0079] Referring to Figures 1, 2, and 3, the second stationary plate 113 can be disposed on the bottom surface 110. Referring to Figures 1, 8, and 9, the second stationary plate 113 can also be disposed on the second side surface 130.
[0080] Figure 10 is a partial structural schematic diagram of a prism motor provided in an embodiment of the present disclosure, and Figure 11 is another partial structural schematic diagram of a prism motor provided in an embodiment of the present disclosure. Figures 10 and 11 mainly illustrate the positional distribution of the magnet and the coil in the prism motor.
[0081] Referring to Figures 1, 10, and 11, in some embodiments, the prism motor further includes a magnet 106 and a coil 107. The magnet 106 is disposed on the prism carrier 101; the coil 107 is disposed on the base 100 and connected to the processing unit 105. Under the control of the processing unit 105, the coil 107 drives the magnet 106 to rotate the prism carrier 101.
[0082] When the processing unit 105 detects the rotation angle of the prism carrier 101, the processing unit 105 controls the magnitude and direction of the current in the coil to drive the magnet to rotate the prism carrier 101 in order to perform jitter compensation control.
[0083] Specifically, magnet 106 includes a first magnet 116, a second magnet 126, and a third magnet 136, and coil 107 includes a first coil 117, a second coil 127, and a third coil 137. The first magnet 116 is disposed opposite to the first coil 117, the second magnet 126 is disposed opposite to the second coil 127, and the third magnet 136 is disposed opposite to the third coil 137.
[0084] The first magnet 116 and the first coil 117 are used to drive the prism carrier 101 to rotate around the first rotation axis X. The second magnet 126 and the second coil 127 are used to drive the prism carrier 101 to rotate around the second rotation axis Y. The third magnet 136 and the third coil 137 are used to drive the prism carrier 101 to rotate around the third rotation axis Z.
[0085] The first coil 117 can be located on the bottom surface 110, and the second coil 127 and the third coil 137 can be located on the second side surface 130 at the same time.
[0086] The number of first coils 117 can be 2, and the number of first magnets 116 can be 4. Two first magnets 116 are in contact with each other to form a group and are arranged opposite to one first coil 117.
[0087] The number of second coils 127 can be 1, and the number of second magnets 126 can be 2. Two second magnets 126 are in contact with each other to form a group and are arranged opposite to a second coil 127.
[0088] The number of third coils 137 can be 2, and the number of third magnets 136 can be 4. Two third magnets 136 are in contact with each other to form a group and are set opposite to a first coil 117.
[0089] It should be noted that the positions and quantities of the first coil 117, the second coil 127, and the third coil 137 on the base 100, and the positions and quantities of the first magnet 116, the second magnet 126, and the third magnet 136 on the prism carrier 101 are shown in Figures 10 and 11 for illustrative purposes only. The positions and quantities of the first coil 117, the second coil 127, the third coil 137, the first magnet 116, the second magnet 126, and the third magnet 136 can be adjusted according to the user's actual needs.
[0090] In some embodiments, the prism motor further includes sheet metal wiring (not shown), which is used to connect the first fixed plate 112, the second fixed plate 113, and the third fixed plate 114 to the processing unit 105 respectively, and the sheet metal wiring is also used to connect the first coil 117, the second coil 127, and the third coil 137 to the processing unit 105 respectively.
[0091] In a specific example, the first moving electrode plate 122, the second moving electrode plate 123, the third moving electrode plate 124, the first magnet 116, the second magnet 126, and the third magnet 136 are cast onto the prism carrier 101 using plastic. The base 100 is a plastic base 100, and the sheet metal circuit, the first fixed electrode plate 112, the second fixed electrode plate 113, the third fixed electrode plate 114, the first coil 117, the second coil 127, the third coil 137, and the processing unit 105 are all embedded in the base 100.
[0092] In the aforementioned prism motor, three electrode assemblies—a first electrode assembly 102, a second electrode assembly 103, and a third electrode assembly 104—are used to detect the rotation angles of the prism carrier 101 around the first rotation axis X, the second rotation axis Y, and the third rotation axis Z, respectively, enabling three-axis rotation angle detection. Furthermore, using smaller electrode assemblies instead of larger Hall effect sensors to detect the rotation angle of the prism carrier 101 reduces the overall size of the prism motor. Determining the rotation angle of the prism carrier 101 based on changes in the capacitance signal generated by the electrode assemblies is less susceptible to interference from external environments such as magnetic fields, resulting in high reliability of the prism motor. In addition, when the prism carrier 101 rotates around a rotation axis, the facing area and distance between the fixed plate and the moving plate in the electrode assembly that detects the rotation axis will change simultaneously. The change in facing area and the change in distance have the same effect on the capacitance signal, which will make the capacitance signal change more significant under the same rotation angle. This will make the detection of the angular rotation of the prism carrier 101 more sensitive and improve the reliability of the prism motor in detecting the angle.
[0093] Accordingly, another embodiment of this disclosure also provides a camera module including the prism motor of any of the above embodiments. The prism module provided in another embodiment of this disclosure will be described below. For parts that are the same as or corresponding to the previous embodiment, please refer to the corresponding descriptions of the foregoing embodiments; detailed descriptions will not be repeated below.
[0094] Figure 12 is a schematic diagram of a prism structure provided in an embodiment of this disclosure, and Figure 13 is a schematic diagram of a camera module structure provided in an embodiment of this disclosure. The dashed lines in Figure 13 represent the optical path of the incident light from the camera module.
[0095] Referring to Figures 1, 12 and 13, the camera module also includes a prism 200, a lens 201 and a photosensitive chip 202. The incident light entering the camera module is reflected by the prism 200 on the prism motor and passes through the lens 201 to reach the photosensitive chip 202.
[0096] Specifically, incident light enters the camera module through the light-transmitting sheet 203, and the propagation direction of the incident light is changed by the reflective surface 210 of the prism 200, so that the incident light can penetrate the lens 201 perpendicularly, and after the lens 201 moves and zooms, it is projected onto the photosensitive chip 202 to achieve the shooting of telephoto images.
[0097] Accordingly, another embodiment of this disclosure also provides a camera device, including the prism motor or camera module in any of the above embodiments. The camera device provided in another embodiment of this disclosure will be described below. For parts that are the same as or corresponding to the previous embodiment, please refer to the corresponding descriptions of the foregoing embodiments; detailed descriptions will not be repeated below.
[0098] Camera equipment refers to electronic devices with camera functions, such as cameras, camcorders, and mobile phones.
[0099] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of this disclosure. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this disclosure; therefore, the scope of protection of this disclosure should be determined by the scope defined in the claims.
Claims
1. A prism motor, comprising: Base; A prism carrier, which is rotatably mounted on the base; The first electrode assembly includes a first fixed electrode plate and a first movable electrode plate arranged parallel to the first rotation axis. The first fixed electrode plate is located on the base, and the first movable electrode plate is located on the prism carrier. The first fixed electrode plate and the first movable electrode plate form a first capacitance signal. When the prism carrier rotates around the first rotation axis, one of the facing area and the distance between the first fixed electrode plate and the first movable electrode plate increases, and the other decreases. The second electrode assembly includes a second fixed electrode and a second movable electrode arranged parallel to the second rotation axis. The second fixed electrode is located on the base, and the second movable electrode is located on the prism carrier. The second fixed electrode and the second movable electrode form a second capacitance signal. When the prism carrier rotates around the second rotation axis, one of the facing area and the distance between the second fixed electrode and the second movable electrode increases, and the other decreases. The third electrode assembly includes a third fixed electrode and a third movable electrode arranged parallel to the third rotation axis. The third fixed electrode is located on the base, and the third movable electrode is located on the prism carrier. The third fixed electrode and the third movable electrode form a third capacitance signal. When the prism carrier rotates around the third rotation axis, one of the facing area and the distance between the third fixed electrode and the third movable electrode increases, and the other decreases. The processing unit determines the rotation angle of the prism carrier based on the changes in the first capacitor signal, the second capacitor signal, and the third capacitor signal when the prism carrier rotates. The first rotation axis, the second rotation axis, and the third rotation axis are all perpendicular to each other.
2. The prism motor according to claim 1, wherein, The first electrode assembly includes two first moving electrode plates and two first fixed electrode plates. One first moving electrode plate is disposed opposite to one first fixed electrode plate, and the other first moving electrode plate is disposed opposite to the other first fixed electrode plate. The two first moving electrode plates are symmetrically arranged along the first rotation axis, and the two first fixed electrode plates are symmetrically arranged along the first rotation axis. The second electrode assembly includes two second moving electrode plates and two second fixed electrode plates, wherein one second moving electrode plate is disposed opposite to one second fixed electrode plate, and the other second moving electrode plate is disposed opposite to the other second fixed electrode plate. The two second moving electrode plates are symmetrically arranged along the second rotation axis, and the two second fixed electrode plates are symmetrically arranged along the second rotation axis. The third electrode assembly includes two third moving electrode plates and two third fixed electrode plates, with one third moving electrode plate and one third fixed electrode plate arranged opposite to each other, and the other third moving electrode plate and the other third fixed electrode plate arranged opposite to each other. The two third moving electrode plates are symmetrically arranged along the third rotation axis, and the two third fixed electrode plates are symmetrically arranged along the third rotation axis.
3. The prism motor according to claim 1, wherein, In a direction parallel to the first rotation axis, the cross-section of the first moving electrode plate and the cross-section of the first fixed electrode plate are both rectangular, and the long side of the first moving electrode plate and the long side of the first fixed electrode plate both extend along the first rotation axis. In a direction parallel to the second rotation axis, the cross-section of the second moving electrode plate and the cross-section of the second fixed electrode plate are both rectangular, and the long side of the second moving electrode plate and the long side of the second fixed electrode plate both extend along the second rotation axis. In a direction parallel to the third rotation axis, the cross-section of the third moving electrode and the cross-section of the third fixed electrode are both rectangular, and the long side of the third moving electrode and the long side of the third fixed electrode both extend along the third rotation axis.
4. The prism motor according to claim 3, wherein, The long side of the first moving electrode plate is smaller than the long side of the first fixed electrode plate, and the projections of the first moving electrode plate and the first fixed electrode plate onto the plane containing the first rotation axis and the third rotation axis satisfy the following condition: the distance between the short side of the first moving electrode plate and the third rotation axis is smaller than the distance between the short side of the first fixed electrode plate and the third rotation axis. The long side of the second moving electrode is smaller than the long side of the second fixed electrode, and the projections of the second moving electrode and the second fixed electrode onto the plane containing the second rotation axis and the third rotation axis satisfy the following: the distance between the short side of the second moving electrode and the third rotation axis is smaller than the distance between the short side of the second fixed electrode and the third rotation axis. The long side of the third moving electrode is smaller than the long side of the third fixed electrode, and the projections of the third moving electrode and the third fixed electrode onto the plane containing the first rotation axis and the third rotation axis satisfy the following condition: the distance between the short side of the third moving electrode and the first rotation axis is smaller than the distance between the short side of the third fixed electrode and the first rotation axis.
5. The prism motor according to claim 3, wherein, The projections of the first moving electrode plate and the first fixed electrode plate onto the plane containing the first rotation axis and the third rotation axis satisfy the following: the maximum distance between the first moving electrode plate and the first rotation axis is greater than the maximum distance between the first fixed electrode plate and the first rotation axis, and the minimum distance between the first moving electrode plate and the first rotation axis is greater than the minimum distance between the first fixed electrode plate and the first rotation axis. The projections of the second moving electrode and the second fixed electrode onto the plane containing the second rotation axis and the third rotation axis satisfy the following: the maximum distance between the second moving electrode and the second rotation axis is greater than the maximum distance between the second fixed electrode and the second rotation axis, and the minimum distance between the second moving electrode and the second rotation axis is greater than the minimum distance between the second fixed electrode and the second rotation axis; The projections of the third moving electrode and the third fixed electrode onto the plane containing the first rotation axis and the third rotation axis satisfy the following conditions: the maximum distance between the third moving electrode and the third rotation axis is greater than the maximum distance between the third fixed electrode and the third rotation axis, and the minimum distance between the third moving electrode and the third rotation axis is greater than the minimum distance between the third fixed electrode and the third rotation axis.
6. The prism motor according to claim 1, wherein, The first fixed electrode plate, the second fixed electrode plate, and the third fixed electrode plate are electrically connected to the processing unit, and the first moving electrode plate, the second moving electrode plate, and the third moving electrode plate are electrically connected through the prism carrier. The first moving electrode plate, the second moving electrode plate, and the third moving electrode plate are all electrically connected to the processing unit.
7. The prism motor according to claim 6, wherein, The first moving electrode plate, the second moving electrode plate, and the third moving electrode plate are integrally formed with the prism carrier, and the first fixed electrode plate, the second fixed electrode plate, and the third fixed electrode plate are integrally formed with the base.
8. The prism motor according to claim 1, wherein, The prism motor also includes: A magnet, which is disposed on the prism carrier; A coil is disposed on the base and connected to the processing unit. Under the control of the processing unit, the coil drives the magnet to rotate the prism carrier.
9. A camera module, comprising: The prism motor as described in any one of claims 1 to 8; A prism, which is mounted on a prism carrier.
10. A camera device comprising a prism motor as described in any one of claims 1 to 8, or a camera module as described in claim 9.