A gimbal camera module and electronic device

Abstract

The application discloses a gimbal camera module and electronic equipment, the gimbal device module comprises: a gimbal rotor, a gimbal stator and an electrode group; the inner wall of the gimbal stator forms a containing cavity, and the gimbal rotor is arranged in the containing cavity; the electrode group comprises a first electrode plate as a rotor and a second electrode plate as a stator, the first electrode plate is arranged on the outer wall of the gimbal rotor, the second electrode plate is arranged on the inner wall of the gimbal stator, and the first electrode plate and the second electrode plate are oppositely arranged; when the gimbal rotor shakes, the projection area of the first electrode plate on the second electrode plate changes, so that the capacitance between the first electrode plate and the second electrode plate changes, wherein the capacitance between the first electrode plate and the second electrode plate is used to determine the shaking angle of the gimbal rotor. The scheme can effectively improve the anti-shake performance of the gimbal camera module.

Description

Technical Field

[0001] This disclosure relates to the field of camera module technology, and in particular to a gimbal camera module and electronic device. Background Technology

[0002] With more and more electronic devices equipped with gimbal camera functionality, image stabilization in gimbal camera modules has become a key factor in improving the user's shooting experience. Currently, image stabilization solutions for gimbal camera modules typically use Hall effect sensors to indirectly detect the angle caused by shaking during the shooting process. For example, a Hall effect sensor detects changes in magnetic field strength caused by shaking and inversely calculates the angle change caused by shaking, further compensating for the shaking angle to achieve image stabilization. However, Hall effect sensors occupy a significant amount of space and can generate electromagnetic interference, which can easily affect the final image stabilization effect. Utility Model Content

[0003] This application provides a gimbal camera module and electronic device that can effectively save space in the gimbal camera module, has strong anti-electromagnetic interference capability, and improve the anti-shake performance of the gimbal camera module.

[0004] In a first aspect, embodiments of this application provide a gimbal camera module, including: Gimbal mover, gimbal stator, and electrode assembly; The inner wall of the gimbal stator forms a receiving cavity, and the gimbal mover is disposed in the receiving cavity; The electrode assembly includes a first electrode plate as a mover and a second electrode plate as a stator. The first electrode plate is disposed on the outer wall of the gimbal mover, and the second electrode plate is disposed on the inner wall of the gimbal stator. The first electrode plate and the second electrode plate are disposed opposite to each other. When the gimbal mover vibrates, the projected area of ​​the first electrode plate on the second electrode plate changes, causing a change in the capacitance between the first electrode plate and the second electrode plate. The capacitance between the first electrode plate and the second electrode plate is used to determine the vibration angle of the gimbal mover.

[0005] In some implementations, the gimbal actuator is an AF module.

[0006] In some embodiments, both the first electrode plate and the second electrode plate are arc-shaped plates, and the first electrode plate and the second electrode plate are concentric arc-shaped plates.

[0007] In some embodiments, both the first electrode plate and the second electrode plate are square straight plates.

[0008] In some embodiments, the receiving cavity is a square receiving cavity, the gimbal stator includes a first inner wall, a second inner wall, a third inner wall and a fourth inner wall connected in sequence, and the gimbal mover includes a first outer wall, a second outer wall, a third outer wall and a fourth outer wall. When the gimbal mover is located in the receiving cavity, the first inner wall is parallel to the first outer wall, the second inner wall is parallel to the second outer wall, the third inner wall is parallel to the third outer wall, and the fourth inner wall is parallel to the fourth outer wall.

[0009] In some embodiments, the gimbal camera module includes: The two sets of electrode groups include a first electrode group for detecting the rotation angle of the gimbal mover along a first rotating axis, and a second electrode group for detecting the rotation angle of the gimbal mover along a second rotating axis, wherein the first rotating axis is perpendicular to the second rotating axis; The first electrode plate in the first electrode group is disposed on the first outer wall, the second electrode plate in the first electrode group is disposed on the first inner wall, the first electrode plate in the second electrode group is disposed on the second outer wall, and the second electrode plate in the second electrode group is disposed on the second inner wall.

[0010] In some embodiments, the size of the first electrode plate in the first electrode group is smaller than the size of the second electrode plate in the first electrode group, wherein when the gimbal mover rotates along the second rotating axis, the area in which the first electrode plate in the first electrode group projects onto the second electrode plate in the first electrode group remains unchanged.

[0011] In some embodiments, the size of the first electrode plate in the second electrode group is smaller than the size of the second electrode plate in the second electrode group, and when the gimbal mover rotates along the first rotating shaft, the area in which the first electrode plate in the second electrode group projects onto the second electrode plate in the second electrode group remains unchanged.

[0012] Secondly, embodiments of this application provide an electronic device including the gimbal camera module provided in the first aspect above.

[0013] In some embodiments, the electronic device includes: The control unit is communicatively connected to the gimbal camera module. The control unit is used to determine the jitter angle of the gimbal mover based on the capacitance between the first electrode plate and the second electrode plate.

[0014] The above-described one or more technical solutions in the embodiments of this application have at least the following technical effects: The gimbal camera module provided in this embodiment includes a gimbal mover, a gimbal stator, and an electrode assembly. The inner wall of the gimbal stator forms a receiving cavity, and the gimbal mover is disposed within this cavity. The electrode assembly includes a first electrode plate serving as the mover and a second electrode plate serving as the stator. The first electrode plate is disposed on the outer wall of the gimbal mover, and the second electrode plate is disposed on the inner wall of the gimbal stator, with the first and second electrode plates facing each other. When the gimbal mover vibrates, the projected area of ​​the first electrode plate on the second electrode plate changes, causing a change in the capacitance between the first and second electrode plates. This capacitance is used to determine the vibration angle of the gimbal mover. In this solution, the capacitance change of the electrode assembly is used to determine the vibration angle of the gimbal mover. Due to the small size of the electrode assembly, internal space of the gimbal camera module can be effectively saved. Simultaneously, the electrode assembly has low power consumption, low heat generation, strong anti-electromagnetic interference capability, and high capacitance detection accuracy, enabling more precise detection of the vibration angle, thereby improving the anti-shake performance of the gimbal camera module. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a gimbal camera module provided in an embodiment of this specification; Figure 2 This is a schematic diagram showing the installation position of an electrode assembly as provided in an embodiment of this specification. Figure 3 A schematic diagram of a gimbal stator and a gimbal mover provided for embodiments of this specification; Figure 4 This is a schematic diagram showing the positions of the two square straight electrode plates when the gimbal mover is not shaking, as provided in the embodiments of this specification. Figure 5 A schematic diagram showing the positions of the two square straight electrode plates when the first electrode plate vibrates with the gimbal mover, provided as an embodiment of this specification. Figure 6 This is a schematic diagram of an electrode assembly provided in an embodiment of this specification, in which both electrode plates are arc-shaped plates; Figures 7-9 Three positional relationships between the first electrode plate and the second electrode plate in the first electrode group provided in the embodiments of this specification; Figures 10-12 The following are three positional relationships between the first electrode plate and the second electrode plate in the second electrode group provided in the embodiments of this specification; Figure 13 This is a schematic diagram of an electronic device provided as an embodiment of this specification. Detailed Implementation

[0016] The overall technical solution of this application embodiment is as follows: a gimbal mover, a gimbal stator, and an electrode assembly; the inner wall of the gimbal stator forms a receiving cavity, and the gimbal mover is disposed within the receiving cavity; the electrode assembly includes a first electrode plate serving as the mover and a second electrode plate serving as the stator, the first electrode plate being disposed on the outer wall of the gimbal mover, and the second electrode plate being disposed on the inner wall of the gimbal stator, with the first electrode plate and the second electrode plate being disposed opposite to each other; when the gimbal mover vibrates, the projected area of ​​the first electrode plate on the second electrode plate changes, causing a change in the capacitance between the first electrode plate and the second electrode plate, wherein the capacitance between the first electrode plate and the second electrode plate is used to determine the vibration angle of the gimbal mover.

[0017] The embodiment of this specification uses the capacitance change of the electrode group to determine the jitter angle of the gimbal mover. Since the electrode group is small in size, it can effectively save the internal space of the gimbal camera group. At the same time, the electrode group has low power consumption, low heat generation, strong anti-electromagnetic interference ability, and high capacitance detection accuracy, which can more accurately detect the jitter angle, thereby improving the anti-shake performance of the gimbal camera module.

[0018] To better understand the above technical solutions, the technical solutions of the present utility model embodiments are described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present utility model are detailed descriptions of the technical solutions, rather than limitations on the technical solutions of the present utility model. Where there is no conflict, the technical features in the embodiments of the present utility model can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0019] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Terms such as "front," "back," "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0022] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a gimbal camera module provided in an embodiment of this specification. Figure 2 This is a schematic diagram showing the installation position of the electrode assembly provided in the embodiments of this specification. Figure 1 , Figure 2 As shown, the gimbal camera module 100 includes a gimbal stator 110, a gimbal mover 120, and an electrode assembly 130. The inner wall of the gimbal stator 110 forms a receiving cavity, and the gimbal mover 120 is disposed within the receiving cavity. The electrode assembly 130 includes a first electrode plate 131 serving as the mover and a second electrode plate 132 serving as the stator. The first electrode plate 131 is disposed on the outer wall of the gimbal mover 120, and the second electrode plate 132 is disposed on the inner wall of the gimbal stator 110. The first electrode plate 131 and the second electrode plate 132 are disposed opposite to each other. When the gimbal mover 120 vibrates, the projected area of ​​the first electrode plate 131 on the second electrode plate 132 changes, causing a change in the capacitance between the first electrode plate 131 and the second electrode plate 132. The capacitance between the first electrode plate 131 and the second electrode plate 132 is used to determine the vibration angle of the gimbal mover 120.

[0023] In some embodiments, the gimbal mover 120 can be an AF (Auto Focus) module, which may include components such as a lens assembly, a voice coil motor, and an image sensor. During the use of the gimbal camera module, the gimbal mover 120 will rotate relative to the gimbal stator 110 due to user movement or shaking. In some embodiments, the gimbal mover 120 can rotate vertically and horizontally.

[0024] The shape and material of the gimbal stator 110 and gimbal mover 120 can be set according to actual needs and are not limited here. In some embodiments, the gimbal stator 110 includes a receiving cavity, and the gimbal mover 120 is disposed in the receiving cavity. The shape of the receiving cavity can be set according to actual needs. For example, the receiving cavity can be a square receiving cavity, a polygonal receiving cavity, an irregularly shaped receiving cavity, etc. The receiving cavity of the gimbal stator 110 can match the outer contour of the gimbal mover 120. For example, when the receiving cavity is a square receiving cavity, the gimbal mover 120 can also be a square module. Of course, the gimbal mover 120 can also be other shapes, as long as it can be placed in the receiving cavity.

[0025] In this embodiment, the jitter angle of the gimbal mover 120 is detected by the electrode assembly 130. Therefore, the two electrode plates included in the electrode assembly 130 can be respectively disposed on the gimbal mover 120 and the gimbal stator 110. In some embodiments, the first electrode plate 131 in the electrode assembly is disposed at a first position on the outer wall of the gimbal mover 120, and the second electrode plate 132 in the electrode assembly is disposed at a second position on the inner wall of the gimbal stator 110 opposite to the first position. The first electrode plate 131 and the second electrode plate 132 form a capacitor.

[0026] When the gimbal mover 120 vibrates, it causes the first electrode plate 131 on the gimbal mover 120 to deflect at an angle, while the second electrode plate 132 on the gimbal stator 110 remains in a fixed position. During the vibration process, the overlap area between the first electrode plate 131 and the second electrode plate 132 will change, and the distance between the first electrode plate 131 and the second electrode plate 132 may also change. When the overlap area and the distance change, it will cause a change in the capacitance between the first electrode plate 131 and the second electrode plate 132. Based on the change in capacitance, the vibration angle can be obtained by inversion.

[0027] Compared to the existing technology that uses Hall sensors, the solution in this specification that uses an electrode array to detect jitter angle can handle higher frequency jitter stabilization and higher precision angle detection.

[0028] In this embodiment, the number of electrode groups 130 can be set according to actual needs, and the positions of the electrode groups 130 correspond to the rotation direction of the gimbal mover 120. For example, if the gimbal mover 120 can rotate along the pitch axis, the electrode group 130 can be set at a position that can detect the up-and-down rotation of the gimbal mover 120. That is, when the gimbal mover 120 rotates up and down, it can cause a change in the projected area between the two electrode plates of the electrode group 130, thereby causing a change in capacitance. If the gimbal mover 120 can rotate along the yaw axis, the electrode group 130 can be set at a position that can detect the left-and-right rotation of the gimbal mover 120. That is, when the gimbal mover 120 rotates left and right, it can cause a change in the projected area between the two electrode plates of the electrode group 130, thereby causing a change in capacitance. When the gimbal mover 120 can rotate along multiple axes, at least one set of electrode groups can be set for each rotation axis to detect the rotation angle corresponding to that rotation axis.

[0029] In some embodiments, the gimbal camera module may include two sets of electrode groups 130. The two sets of electrode groups 130 include a first electrode group for detecting the rotation angle of the gimbal mover 120 along a first axis, and a second electrode group for detecting the rotation angle of the gimbal mover 120 along a second axis, wherein the first axis is perpendicular to the second axis. It should be noted that the first axis can be a pitch axis, and the second axis can be a yaw axis. Of course, the first axis and the second axis can also be other axes, which are not limited here.

[0030] It should be noted that when the gimbal camera module includes two sets of electrode groups 130, the jitter angle in the corresponding direction can be determined by each set of motors. For example, the rotation angle along the first axis can be determined by the change in the capacitance of the first electrode group. The angle of rotation along the second axis is determined by the change in capacitance of the second electrode group. Then and The final jitter angle of the gimbal camera module is synthesized to enable the gimbal camera module to perform image stabilization based on the final jitter angle.

[0031] To better understand the placement of the two sets of electrodes, the specific positions of the electrode sets will be explained below, taking the square cavity of the gimbal stator 110 as an example.

[0032] like Figure 3As shown, the gimbal stator cavity is a square cavity. The gimbal stator 110 includes a first inner wall 111, a second inner wall 112, a third inner wall 113, and a fourth inner wall 114 connected in sequence. The gimbal mover 120 includes a first outer wall 121, a second outer wall 122, a third outer wall 123, and a fourth outer wall 124. When the gimbal mover 120 is located in the cavity, the first inner wall 111 is parallel to the first outer wall 121, the second inner wall 112 is parallel to the second outer wall 122, the third inner wall 113 is parallel to the third outer wall 123, and the fourth inner wall 114 is parallel to the fourth outer wall 124.

[0033] In order to detect the angle of the gimbal mover 120 when it vibrates along the first and second axes, the first electrode group ( Figure 3 The first electrode plate of the electrode group (within the dotted frame above the gimbal camera module) is disposed on the first outer wall 121, and the second electrode plate of the first electrode group is disposed on the first inner wall 111. Figure 3 The first electrode plate in the electrode group (within the dotted frame on the right side of the gimbal camera module) is disposed on the second outer wall 122, and the second electrode plate in the second electrode group is disposed on the second inner wall 112.

[0034] When the gimbal mover 120 rotates up and down, the first electrode plate in the first electrode group moves up and down relative to the second electrode plate, causing a change in the projection of the first electrode plate onto the second electrode plate, and thus a change in the capacitance of the first electrode group. When the gimbal mover 120 moves left and right, the first electrode plate in the second electrode group moves left and right relative to the second electrode plate, causing a change in the projection of the first electrode plate onto the second electrode plate, and thus a change in the capacitance of the second electrode group.

[0035] In the embodiments described in this specification, the capacitance between the first electrode plate and the second electrode plate in the electrode assembly 130 can be calculated using the following formula:

[0036] Where C is the capacitance between the first electrode plate and the second electrode plate. Let S be the relative permittivity, S be the area between the first and second electrode plates, k be the electrostatic constant, and d be the distance between the first and second electrode plates.

[0037] It should be noted that, as shown in the formula above, capacitance and S / d have a linear relationship. Since the jitter angle of the gimbal mover 120 is generally controlled within 3°, d can be considered approximately constant during jitter. Therefore, the relationship between capacitance C and the facing area S between the electrode plates is approximately linear, and the relationship between S and the jitter angle is also linear. Thus, it can be deduced that capacitance C and the jitter angle have a linear relationship. In some embodiments, a linear relationship between capacitance and jitter angle can be established first. For example, a jitter angle can be set, and then the capacitance at that jitter angle can be measured to establish the relationship between capacitance and jitter angle. Then, when a change in capacitance is detected, the corresponding jitter angle can be determined through the relationship between capacitance and jitter angle.

[0038] In this embodiment of the specification, when the two electrode plates in the electrode assembly 130 are in their initial position, i.e., when the gimbal mover 120 is not shaking, the first electrode plate 131 and the second electrode plate 132 in the electrode assembly 130 can be staggered. That is, the first electrode plate 131 and the second electrode plate 132 only partially overlap, and the capacitance value of the electrode assembly 130 is between the maximum and minimum detectable capacitance values. In this way, the direction of the shaking angle deflection can be distinguished based on the capacitance value detected during shaking. For example, in the initial position without shaking, the capacitance value of the electrode assembly 130 is A. If the detected capacitance value of the electrode assembly 130 is greater than A, it can be determined that the gimbal mover 120 rotates in a first direction. If the detected capacitance value of the electrode assembly 130 is less than A, it can be determined that the gimbal mover 120 rotates in a second direction opposite to the first direction.

[0039] Based on this, when setting the positional relationship between the first electrode plate 131 and the second electrode plate 132 of the electrode assembly 130, it is necessary to ensure that when there is no shaking, a portion of the area of ​​the first electrode plate 131 and the second electrode plate 132 overlaps, and that the projection of the first electrode plate 131 onto the second electrode plate 132 is always changing as the gimbal mover 120 rotates from the maximum shaking angle in the first direction to the maximum shaking angle in the second direction. Taking the maximum shaking angle in the first direction as the maximum shaking angle to the left and the maximum shaking angle in the second direction as the maximum shaking angle to the right as an example, the projection of the first electrode plate 131 onto the second electrode plate 132 is always changing as the gimbal mover 120 rotates from the maximum shaking angle to the left to the maximum shaking angle to the right. In some embodiments, when the gimbal mover 120 rotates to the maximum shaking angle in the first direction and to the maximum shaking angle in the second direction, the projection of the first electrode plate 131 onto the second electrode plate 132 is possible.

[0040] It should be noted that, considering the first electrode plate 131 acts as the moving electrode plate when the gimbal camera module is stationary, its position may be random. Therefore, the capacitance of the electrode group 130 can be corrected each time the gimbal camera module is powered on. In some embodiments, after the gimbal camera module is powered on, a large current can be input to the gimbal camera module to make the gimbal moving element 120 rotate between its maximum rotation positions in two directions, thereby detecting the maximum and minimum capacitance values. Furthermore, the average value can be calculated from the maximum and minimum capacitance values, and the average value can be used as the capacitance value at the initial position, i.e., the position of the moving electrode plate when there is no angular jitter. Then, the relationship between capacitance and jitter angle can be updated using the corrected capacitance value.

[0041] In some embodiments, the first electrode plate 131 and the second electrode plate 132 in the electrode assembly 130 can both be square straight plates.

[0042] In some other embodiments, the first electrode plate 131 and the second electrode plate 132 in the electrode group 130 can both be arc-shaped plates, and the first electrode plate 131 and the second electrode plate 132 are concentric arc-shaped plates.

[0043] For details, please refer to Figure 4 , Figure 5 This is a schematic diagram showing that both electrode plates in the electrode assembly are square straight plates. For example... Figure 4 As shown, when the gimbal mover 120 does not vibrate, the two square plates are parallel and staggered, meaning only a portion of their areas overlap. Figure 5 As shown, when the first electrode plate 131 vibrates with the gimbal mover 120, the first electrode plate 131 has a certain tilt angle relative to the second electrode plate 132, and the distance between the first electrode plate 131 and the second electrode plate 132 will change slightly.

[0044] Please refer to Figure 6 This diagram illustrates an electrode assembly where both electrode plates are arc-shaped. When the first electrode plate 131 and the second electrode plate 132 are concentric arc-shaped plates, the distance between them is constant. Even when the first electrode plate 131 moves relative to the second electrode plate 132, the distance remains unchanged. In other words, relative movement of the arc-shaped plates only alters the relative area between the plates, not the distance between them. Therefore, the relationship between capacitance and dithering angle is linear. This demonstrates that concentric arc-shaped plates ensure a more precise final dithering angle.

[0045] Continuing with the example of the gimbal mover 120 rotating along the first and second axes, considering that if the capacitance of both the first and second electrode groups changes when the gimbal mover 120 rotates along either the first or second axis, the final jitter angle may not be accurately determined. Therefore, to accurately determine the rotation direction and angle of the gimbal mover, when the gimbal mover 120 rotates only along the first axis, the size between the first and second electrode plates in the second electrode group can be set to ensure that the facing area between the first and second electrode plates remains unchanged or approximately unchanged. That is, the capacitance of the second electrode group will not change when the gimbal mover 120 rotates along the first axis. This ensures that the rotation angle of the gimbal mover 120 when rotating along the first axis can be determined by the capacitance change of the first electrode group.

[0046] Similarly, when the gimbal mover 120 rotates only along the second axis, the facing area between the first electrode plate and the second electrode plate in the first electrode group can be kept constant or approximately constant by setting the size between them. That is, the capacitance of the first electrode group will not change when the gimbal mover 120 rotates along the second axis. This ensures that the rotation angle of the gimbal mover 120 when rotating along the second axis can be determined by the change in capacitance of the second electrode group.

[0047] To achieve the above effects, in some embodiments, the size of the first electrode plate in the first electrode group is smaller than the size of the second electrode plate in the first electrode group. When the gimbal mover 120 rotates along the second axis, the area where the first electrode plate in the first electrode group projects its projection onto the second electrode plate in the first electrode group remains unchanged. In some embodiments, the size of the first electrode plate in the second electrode group is smaller than the size of the second electrode plate in the second electrode group. When the gimbal mover 120 rotates along the first axis, the area where the first electrode plate in the second electrode group projects its projection onto the second electrode plate in the second electrode group remains unchanged.

[0048] Please refer to Figures 7-9Let's consider the positional relationship between the first and second electrode plates in the first electrode group. Using the example of detecting vertical jitter angles with the first electrode group, when the gimbal mover 120 jitters left and right, the facing area of ​​the first and second electrode plates in the first electrode group needs to remain unchanged. Since the left and right jitter of the gimbal mover 120 causes the first electrode plate in the first electrode group to move left and right relative to the second electrode plate, to ensure that the capacitance does not change during this movement, the area projected from the first electrode plate onto the second electrode plate must not exceed the area of ​​the second electrode plate during this movement. That is, within the maximum left and right jitter angle range of the gimbal mover 120, the projected area on the second electrode plate corresponds to the same area on the first electrode plate. For example, when the gimbal mover 120 jitters left and right by a first angle, area A on the first electrode plate forms a projected area on the second electrode plate, which is the facing area. When the gimbal mover jitters left and right by a second angle, area A on the first electrode plate still forms a projected area on the second electrode plate.

[0049] As can be seen from the above, the size of the second electrode plate needs to be larger than that of the first electrode plate. Specifically, the first projection position of the first electrode plate when it rotates to the left at the maximum angle and the second projection position of the first electrode plate when it rotates to the right at the maximum angle can be determined. The size of the second electrode plate needs to cover the first projection position and the second projection position.

[0050] like Figure 7 As shown, this illustrates the positional relationship between the first electrode plate and the second electrode plate before the gimbal's moving part vibrates left and right. Figure 8 The diagram shows the positional relationship between the first and second electrode plates of the first electrode group after the gimbal mover rotates to the left. This indicates that the capacitance of the first electrode group remains unchanged when the gimbal mover only vibrates left and right. Figure 9 As shown, the positional relationship between the first electrode plate and the second electrode plate is such that when the gimbal mover rotates upward, the projection of the first electrode plate onto the second electrode plate changes, thereby changing the capacitance of the first electrode group. Figures 7-9 In the first electrode plate, the smaller electrode plate is the first electrode plate, and the larger electrode plate is the second electrode plate.

[0051] Please refer to Figures 10-12Let's consider the positional relationship between the first and second electrode plates in the second electrode group. Using the example of detecting left-right jitter angles with the second electrode group, when the gimbal mover 120 jitters up and down, the facing area of ​​the first and second electrode plates in the second electrode group must remain unchanged. Since the up-and-down jitter of the gimbal mover 120 causes the first electrode plate in the second electrode group to move up and down relative to the second electrode plate, to ensure that the capacitance does not change during this movement, the area projected from the first electrode plate onto the second electrode plate must not exceed the area of ​​the second electrode plate during the up-and-down movement. That is, within the maximum up-and-down jitter angle range of the gimbal mover 120, the projected area on the second electrode plate corresponds to the same area on the first electrode plate. For example, when the gimbal mover 120 jitters up and down by a third angle, area B on the first electrode plate forms a projected area on the second electrode plate, which is the facing area. When the gimbal mover 120 jitters up and down by a fourth angle, area B on the first electrode plate still forms a projected area on the second electrode plate.

[0052] As can be seen from the above, the size of the second electrode plate needs to be larger than that of the first electrode plate. Specifically, the third projection position of the first electrode plate when it rotates upward at the maximum angle and the fourth projection position of the first electrode plate when it rotates downward at the maximum angle can be determined. The size of the second electrode plate needs to cover the third projection position and the fourth projection position.

[0053] like Figure 10 As shown, this illustrates the positional relationship between the first and second electrode plates before the gimbal mover 120 vibrates up and down. Figure 11 As shown, this illustrates the positional relationship between the first and second electrode plates after the gimbal mover 120 rotates upwards. This demonstrates that when the gimbal mover 120 only vibrates up and down, the capacitance of the second electrode group remains constant. Figure 12 As shown, the positional relationship between the first electrode plate and the second electrode plate is such that when the gimbal mover 120 rotates to the left, the projection of the first electrode plate onto the second electrode plate changes, thereby changing the capacitance of the second electrode group. Figures 10-12 In the first electrode plate, the smaller electrode plate is the first electrode plate, and the larger electrode plate is the second electrode plate.

[0054] In summary, the embodiments described in this specification demonstrate that by setting one or more sets of electrode groups, the jitter angle of the gimbal camera module can be effectively detected. When the gimbal camera module has multiple sets of electrode groups, the rotation angles of each set in its respective direction are combined to obtain the jitter angle of the gimbal camera module. Because the electrode groups have low power consumption, low heat generation, strong anti-electromagnetic interference capabilities, and high capacitance detection accuracy, they can more accurately detect the jitter angle, thereby improving the anti-shake performance of the gimbal camera module.

[0055] Based on the same concept, embodiments of this specification also provide an electronic device, such as... Figure 13 The diagram shows an electronic device 800, which includes the aforementioned gimbal camera module 100. In some embodiments, the electronic device may be a device equipped with a gimbal camera module, such as a mobile phone, tablet computer, action camera, etc.

[0056] In some embodiments, the electronic device 800 may further include a control unit that is communicatively connected to the gimbal camera module 100. The control unit is used to determine the jitter angle of the gimbal mover 120 based on the capacitance between the first electrode plate 131 and the second electrode plate 132.

[0057] Specifically, the control unit can determine the current jitter angle of the gimbal mover 120 through the linear relationship between the capacitor and the jitter angle mentioned above. Furthermore, the control unit can send the jitter angle to the drive unit, which then compensates for the jitter angle.

[0058] In summary, the solution provided in the embodiments of this specification enables the detection of jitter angle by setting up an electrode assembly, eliminating the need for a Hall sensor. This effectively saves on the cost and internal space of the gimbal camera module and avoids the electromagnetic interference problems associated with Hall sensor detection methods. Furthermore, the electrode assembly offers higher angle detection accuracy, allowing for more precise detection of jitter angle and thus improving the image stabilization performance of the gimbal camera module.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0060] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible to those skilled in the art. If a combination of technical solutions contradicts each other or cannot be implemented, such a combination should be considered non-existent and not within the scope of protection claimed in this application. Although exemplary embodiments of this disclosure have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the exemplary embodiments and all changes and modifications falling within the scope of this disclosure.

[0061] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A gimbal camera module, characterized in that, include: Gimbal mover, gimbal stator, and electrode assembly; The inner wall of the gimbal stator forms a receiving cavity, and the gimbal mover is disposed in the receiving cavity; The electrode assembly includes a first electrode plate as a mover and a second electrode plate as a stator. The first electrode plate is disposed on the outer wall of the gimbal mover, and the second electrode plate is disposed on the inner wall of the gimbal stator. The first electrode plate and the second electrode plate are disposed opposite to each other. When the gimbal mover vibrates, the projected area of ​​the first electrode plate on the second electrode plate changes, causing a change in the capacitance between the first electrode plate and the second electrode plate. The capacitance between the first electrode plate and the second electrode plate is used to determine the vibration angle of the gimbal mover.

2. The gimbal camera module as described in claim 1, characterized in that, The gimbal actuator is an AF module.

3. The gimbal camera module as described in claim 1, characterized in that, Both the first electrode plate and the second electrode plate are arc-shaped plates, and the first electrode plate and the second electrode plate are concentric arc-shaped plates.

4. The gimbal camera module as described in claim 1, characterized in that, Both the first electrode plate and the second electrode plate are square straight plates.

5. The gimbal camera module as described in claim 1, characterized in that, The receiving cavity is a square receiving cavity. The gimbal stator includes a first inner wall, a second inner wall, a third inner wall, and a fourth inner wall connected in sequence. The gimbal mover includes a first outer wall, a second outer wall, a third outer wall, and a fourth outer wall. When the gimbal mover is located in the receiving cavity, the first inner wall is parallel to the first outer wall, the second inner wall is parallel to the second outer wall, the third inner wall is parallel to the third outer wall, and the fourth inner wall is parallel to the fourth outer wall.

6. The gimbal camera module as described in claim 5, characterized in that, The gimbal camera module includes: The two sets of electrode groups include a first electrode group for detecting the rotation angle of the gimbal mover along a first rotating axis, and a second electrode group for detecting the rotation angle of the gimbal mover along a second rotating axis, wherein the first rotating axis is perpendicular to the second rotating axis; The first electrode plate in the first electrode group is disposed on the first outer wall, the second electrode plate in the first electrode group is disposed on the first inner wall, the first electrode plate in the second electrode group is disposed on the second outer wall, and the second electrode plate in the second electrode group is disposed on the second inner wall.

7. The gimbal camera module as described in claim 6, characterized in that, The size of the first electrode plate in the first electrode group is smaller than the size of the second electrode plate in the first electrode group. When the gimbal mover rotates along the second rotating axis, the area in which the projection of the first electrode plate in the first electrode group onto the second electrode plate in the first electrode group remains unchanged.

8. The gimbal camera module as described in claim 6, characterized in that, The size of the first electrode plate in the second electrode group is smaller than the size of the second electrode plate in the second electrode group. When the gimbal mover rotates along the first rotating shaft, the area in which the first electrode plate in the second electrode group projects onto the second electrode plate in the second electrode group remains unchanged.

9. An electronic device, characterized in that, Includes the gimbal camera module as described in any one of claims 1-8.

10. The electronic device as claimed in claim 9, characterized in that, The electronic device includes: The control unit is communicatively connected to the gimbal camera module. The control unit is used to determine the jitter angle of the gimbal mover based on the capacitance between the first electrode plate and the second electrode plate.

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