Motor anti-shake detection device, anti-shake motor and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of camera shooting, and discloses a motor anti-shake detection device, an anti-shake motor and electronic equipment. According to the motor anti-shake detection device, an upper moving support can generate displacement change only in a first direction relative to an upper base; the lower moving support can generate displacement changes in the first direction and the second direction relative to the upper base, the lower moving support abuts against the upper moving support in the first direction, movement of the lower moving support in the first direction drives the upper moving support to generate corresponding movement, and the first direction is perpendicular to the second direction. The image sensor is fixed on the lower moving bracket and moves along with the lower moving bracket; the first detection unit is used for detecting the movement condition in a first direction, and the second detection unit is used for detecting the movement condition in a second direction; the processing unit is used for carrying out jitter correction according to detection results of the first detection unit and the second detection unit. Therefore, the detection precision of the detection device is improved.

Description

Technical Field

[0001] This utility model relates to the field of camera technology, and in particular to a detection device for motor-driven image stabilization, an image stabilization motor, and an electronic device. Background Technology

[0002] Current image stabilization motors require at least three directions of lens movement control to achieve both image stabilization and focusing simultaneously. Movement control in the focusing direction (Z-axis) enables focusing, while movement control in at least two mutually perpendicular directions (X-axis and Y-axis) in a plane perpendicular to the focusing direction enables image stabilization. Therefore, a displacement detection device is needed for each direction requiring movement control.

[0003] The inventors discovered that the aforementioned displacement detection device setup has at least the following drawbacks: adding at least three sets of detection devices to the lens and controlling the lens to move in at least three directions makes lens movement control quite complex. Furthermore, if a Hall sensor is used as the displacement monitoring device, multiple sets of magnets need to be placed on the lens. Displacement is determined by the changes in the magnetic field corresponding to displacement in different directions. In this case, the magnetic fields of the multiple sets of magnets on the lens interfere with each other, leading to inaccurate detection results from the Hall sensor. Moreover, because the magnetic field changes non-linearly, processing the detection results is even more complex, resulting in poor image stabilization and focusing performance. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a motor anti-shake detection device, an anti-shake motor, and an electronic device to improve the detection accuracy of the detection device.

[0005] To address the aforementioned technical problems, embodiments of this utility model provide a motor anti-shake detection device, comprising: an accommodating space enclosed by an upper base and a lower base, and an upper movable bracket and a lower movable bracket sequentially arranged within the accommodating space according to the light incident direction; the upper movable bracket can only undergo displacement relative to the upper base in a first direction; the lower movable bracket can undergo displacement relative to the upper base in both the first and second directions, and the lower movable bracket abuts against the upper movable bracket in the first direction, the movement of the lower movable bracket in the first direction causing the upper movable bracket to move accordingly, the first direction being perpendicular to the second direction; the motor anti-shake detection device further comprises: an image sensor, the image sensor being fixed to the lower movable bracket and moving with the lower movable bracket; the motor anti-shake detection device further comprises: a first detection unit disposed on the upper movable bracket and a second detection unit disposed on the lower movable bracket; the first detection unit is used to detect the movement in the first direction, and the second detection unit is used to detect the movement in the second direction; the motor anti-shake detection device further comprises: a processing unit, the processing unit being used to perform shake correction based on the detection results of the first detection unit and the second detection unit.

[0006] An embodiment of this utility model also provides a stabilization motor, including: the above-mentioned motor stabilization detection device, a lens, and a light-transmitting film; during imaging, external light passes through the light-transmitting film and the lens in sequence and reaches the motor stabilization detection device.

[0007] An embodiment of this utility model also provides an electronic device, including the above-described motor anti-shake detection device or the above-described anti-shake motor.

[0008] Compared to existing technologies, this embodiment of the invention mounts the image sensor on a bracket. The movement of the bracket causes the image sensor to displace relative to the upper base in both a first and second direction. This movement of the image sensor compensates for shake, thus transferring the lens's image stabilization function to the movement of the image sensor. The lens only needs to focus, simplifying lens movement control. Furthermore, the motor-driven image stabilization detection device comprises an upper and a lower moving bracket. The upper moving bracket only undergoes displacement in the first direction, not in the second. A first detection unit is mounted on the upper moving bracket, ensuring that its detection results are only affected by the displacement in the first direction. This results in more accurate detection and improved detection precision. In addition to the first detection unit, a second detection unit is mounted on the lower moving bracket to detect displacement changes in the second direction. Combining the detection results from both units for shake correction provides a more comprehensive and effective motor-driven image stabilization effect.

[0009] In addition, the first detection unit includes: a first floating electrode plate fixed to the upper movable bracket, and a first transmitting electrode plate and a first receiving electrode plate fixed to the upper base. The first floating electrode plate is disposed opposite to the first transmitting electrode plate and the first receiving electrode plate, and the projection of the first floating electrode plate toward the upper base overlaps with the first transmitting electrode plate and the first receiving electrode plate. When the upper movable bracket moves in the first direction, the relative area between the first floating electrode plate and the first receiving electrode plate changes with the movement.

[0010] In addition, the second detection unit includes: a second floating electrode plate fixed to the lower movable bracket, and a second transmitting electrode plate and a second receiving electrode plate fixed to the upper base. The second floating electrode plate is disposed opposite to both the second transmitting electrode plate and the second receiving electrode plate, and the projection of the second floating electrode plate toward the upper base overlaps with both the second transmitting electrode plate and the second receiving electrode plate. When the lower movable bracket moves at least in the second direction, the relative area between the second floating electrode plate and the second receiving electrode plate changes with the movement.

[0011] In addition, the second detection unit includes: a detection magnet disposed on the lower movable bracket, and a first magnetic sensor disposed opposite to the detection magnet, the position of the first magnetic sensor being fixed relative to the position of the upper base; when the lower movable bracket moves at least in the second direction, the distance between the detection magnet and the first magnetic sensor changes.

[0012] In addition, the motor anti-shake detection device also includes a drive unit; the drive unit includes a first magnet and a second magnet disposed on the lower moving bracket, and a first coil disposed opposite to the first magnet and a second coil disposed opposite to the second magnet; wherein the first magnet and the first coil are used to control the lower moving bracket to move in a first direction, and the second magnet and the second coil are used to control the lower moving bracket to move in a second direction.

[0013] In addition, the second detection unit includes: a second magnetic sensor disposed adjacent to the second magnet, the position of the second magnetic sensor being relatively fixed relative to the position of the upper base; when the lower moving bracket moves at least in the second direction, the distance between the second magnet and the second magnetic sensor changes.

[0014] In addition, the motor anti-vibration detection device also includes: a fixed roller groove disposed on the surface of the upper base facing the upper movable bracket, the direction of the fixed roller groove being consistent with the first direction; the upper movable bracket includes: a first roller groove disposed opposite to the fixed roller groove, the first roller groove having the same direction as the fixed roller groove, and a first ball being disposed in the roller grooves of the oppositely disposed fixed roller groove and the first roller groove.

[0015] In addition, there are three fixed roller grooves, which are respectively fixed at any three corners of the upper base. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is an exploded structural diagram of the motor anti-vibration detection device according to the embodiment of this solution;

[0018] Figure 2 This is a schematic diagram of the upper and lower movable brackets of the motor anti-vibration detection device according to the embodiment of this solution;

[0019] Figure 3 This is a schematic diagram of the structure of the first floating electrode plate and the second floating electrode plate in the motor anti-vibration detection device according to the embodiment of this solution;

[0020] Figure 4 This is a schematic diagram of the structure of each electrode plate in the motor anti-vibration detection device according to the embodiment of this solution;

[0021] Figure 5This is a schematic diagram of the relevant parameters of each plate in the motor anti-vibration detection device according to the embodiment of this solution;

[0022] Figure 6 This is a schematic diagram of the relevant parameters of each plate in the motor anti-vibration detection device according to the embodiment of this solution;

[0023] Figure 7 It is a graph of the capacitance signal of the first detection unit in the motor anti-shake detection device according to the embodiment of this solution;

[0024] Figure 8 It is a graph of the capacitance signal of the second detection unit in the motor anti-vibration detection device according to the embodiment of this solution;

[0025] Figure 9 It is a graph showing the differential calculation result of the capacitance signal of the first detection unit in the motor anti-shake detection device in this embodiment of the solution;

[0026] Figure 10 It is a graph showing the differential calculation result of the capacitance signal of the second detection unit in the motor anti-shake detection device in this embodiment of the solution;

[0027] Figure 11 This is a schematic diagram of the detection device for motor anti-vibration according to another embodiment of this solution;

[0028] Figure 12 This is a schematic diagram of the drive unit of the motor anti-vibration detection device according to the embodiment of this solution;

[0029] Figure 13 This is a schematic diagram of the anti-shake motor according to an embodiment of this solution;

[0030] Figure 14 This is a schematic diagram of the periscope motor according to an embodiment of this solution.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Upper base;

[0033] 2-Lower base;

[0034] 3-Upper movable support; 31-First roller groove; 32-Second roller groove;

[0035] 4-Lower movable support; 41-Third roller groove;

[0036] 5-Image sensor;

[0037] 61-First detection unit; 62-Second detection unit; 611-First floating electrode plate; 612-First transmitting electrode plate; 613-First receiving electrode plate; 621-Second floating electrode plate; 622-Second transmitting electrode plate; 623-Second receiving electrode plate; 624-First magnetic sensor; 626-Detection coil;

[0038] 7-Fixed groove;

[0039] 81-First magnet; 82-First coil; 83-Second magnet; 84-Second coil;

[0040] 10 - Detection device for motor-driven image stabilization; 20 - Lens; 30 - Lens; 40 - Prism. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this utility model to enable readers to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0042] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with or referenced by each other without contradiction.

[0043] Embodiments of this utility model relate to a detection device for motor anti-vibration, such as... Figure 1As shown, the motor anti-shake detection device includes: an accommodating space enclosed by an upper base 1 and a lower base 2, and an upper movable support 3 and a lower movable support 4 arranged sequentially within the accommodating space according to the light incident direction; the upper movable support 3 can only undergo displacement change relative to the upper base 1 in a first direction; the lower movable support 4 can undergo displacement change relative to the upper base 1 in both the first and second directions, and the lower movable support 4 abuts against the upper movable support 3 in the first direction, and the movement of the lower movable support 4 in the first direction causes the upper movable support 3 to move accordingly, the first direction being perpendicular to the second direction; the motor anti-shake detection device also includes: an image sensor 5, which is fixed to the lower movable support 4 and moves with the lower movable support 4; the motor anti-shake detection device also includes: a first detection unit 61 disposed on the upper movable support 3 and a second detection unit 62 disposed on the lower movable support 4; the first detection unit 61 is used to detect the movement in the first direction, and the second detection unit 62 is used to detect the movement in the second direction; the motor anti-shake detection device also includes: a processing unit, which is used to perform shake correction based on the detection results of the first detection unit 61 and the second detection unit 62.

[0044] Compared to existing technologies, this embodiment of the invention mounts the image sensor on a bracket. The movement of the bracket causes the image sensor to displace relative to the upper base in both a first and second direction. This movement of the image sensor compensates for shake, thus transferring the lens's image stabilization function to the movement of the image sensor. The lens only needs to focus, simplifying lens movement control. Furthermore, the motor-driven image stabilization detection device comprises an upper and a lower moving bracket. The upper moving bracket only undergoes displacement in the first direction, not in the second. A first detection unit is mounted on the upper moving bracket, ensuring that its detection results are only affected by the displacement in the first direction. This results in more accurate detection and improved detection precision. In addition to the first detection unit, a second detection unit is mounted on the lower moving bracket to detect displacement changes in the second direction. Combining the detection results from both units for shake correction provides a more comprehensive and effective motor-driven image stabilization effect.

[0045] One way to ensure that the upper movable support moves only in the first direction is as follows: Figure 1 As shown, the motor anti-vibration detection device includes: a fixed roller groove 7 disposed on the surface of the upper base 1 facing the upward moving bracket 3, the roller groove 7 having a groove orientation parallel to the first direction ( Figure 2 (The X-axis direction shown is consistent.) Additionally, as... Figure 2As shown, the upper movable support 3 includes: a first roller groove 31 positioned opposite to the fixed roller groove 7, the first roller groove 31 having the same groove direction as the fixed roller groove 7, and a first ball bearing (not shown) disposed within the grooves of the oppositely positioned fixed roller groove 7 and the first roller groove 31. Along the first direction (…), the upper movable support 3… Figure 2 When the upper movable bracket 3 moves in the X-axis direction (as shown), the first ball rolls in the first channel formed between the fixed groove 7 and the first groove 31, and the upper movable bracket 3 can generate displacement in the first direction relative to the upper base 1. When the upper movable bracket 3 wants to move in the second direction (as shown), Figure 2 When the upper moving bracket 3 moves in the Y-axis direction (as shown), since the direction of movement is inconsistent with the direction of the first channel formed between the fixed groove 7 and the first groove 31, the first ball will get stuck on the inner wall of the first channel and cannot move. The upper moving bracket 3 is resisted by the first channel and the first ball and cannot move in the second direction.

[0046] In addition, to ensure that the upper movable support 3 moves with the lower movable support 4 in the first direction, and that the movement of the lower movable support 4 in the second direction does not affect the position change of the upper movable support 3, such as... Figure 2 As shown, a second groove 32 is provided on the lower surface of the upper movable bracket 3 (the surface near the lower movable bracket 4), and the direction of the second groove 32 is parallel to the second direction ( Figure 2 The direction of the second groove 32 is perpendicular to the direction of the first groove 31, which is consistent with the direction of the Y-axis shown. Simultaneously, a third groove 41 is provided on the upper surface of the lower moving bracket 4 (near the surface of the upper moving bracket 3). The direction of the third groove 41 is consistent with the direction of the second groove 32. The third groove 41 and the second groove 32 form a second channel in the second direction, and a second ball is disposed within the second channel. The lower moving bracket 4 is positioned along the first direction (…). Figure 2 When the upper moving bracket 3 and the lower moving bracket 4 move in the X-axis direction (as shown), because the direction of movement is inconsistent with the direction of the second channel formed between the third groove 41 and the second groove 32, the second ball will get stuck on the inner wall of the second channel and cannot move. The upper moving bracket 3 and the lower moving bracket 4 are relatively fixed in the first direction. Therefore, when the lower moving bracket 4 moves in the first direction, it will drive the upper moving bracket 3 to move, and the two move synchronously in the first direction. However, if the lower moving bracket 4 moves in the second direction (…), it will cause the upper moving bracket 3 to move. Figure 2 When the ball moves along the Y-axis (as shown), the direction of movement is consistent with the direction of the second channel. Therefore, the second ball can roll within the second channel, and the lower moving bracket 4 and the upper moving bracket 3 can generate relative displacement in the second direction. However, because the upper moving bracket 3 is held by the first ball and the inner wall of the first channel, the upper moving bracket 3 will not move in the second direction. Therefore, only the lower moving bracket 4 moves in the second direction, and at this time, the upper moving bracket 3 will not generate displacement changes in the second direction.

[0047] Furthermore, to enhance the overall stability of the device, the number of fixed roller slots can be greater than two. For example, three or four fixed roller slots can be evenly distributed on the lower surface of the upper base. For conventional sensor shift optical image stabilization (SIO), four fixed roller slots can form a symmetrical structure. For periscope sensor shift optical image stabilization (SIO), due to space limitations, the number of fixed roller slots can be reduced appropriately. For example, three fixed roller slots can form a stable triangular structure. Specifically, the three fixed roller slots are fixed at at least three corners of the upper base. In practice, the fixed roller slots can be placed at any three corners where there is relatively ample space, depending on the arrangement of the internal components.

[0048] The configuration methods for the first and second detection units are as follows: (e.g.) Figures 3 to 4 As shown, the first detection unit includes: a first floating electrode plate 611 fixed to the upper movable bracket, and a first transmitting electrode plate 612 and a first receiving electrode plate 613 fixed to the upper base. The first floating electrode plate 611 is arranged opposite to the first transmitting electrode plate 612 and the first receiving electrode plate 613, and the projection of the first floating electrode plate 611 toward the upper base overlaps with the first transmitting electrode plate 612 and the first receiving electrode plate 613. When the upper movable bracket moves in the first direction, the relative area between the first floating electrode plate 611 and the first receiving electrode plate 613 changes with the movement.

[0049] The second detection unit includes: a second floating electrode plate 621 fixed to the lower movable bracket, and a second transmitting electrode plate 622 and a second receiving electrode plate 623 fixed to the upper base. The second floating electrode plate 621, the second transmitting electrode plate 622, and the second receiving electrode plate 623 are all arranged opposite to each other, and the projection of the second floating electrode plate 621 toward the upper base overlaps with the second transmitting electrode plate 622 and the second receiving electrode plate 623. When the lower movable bracket moves at least in the second direction, the relative area between the second floating electrode plate 621 and the second receiving electrode plate 623 changes with the movement.

[0050] Since the upper movable bracket is positioned between the lower movable bracket and the upper base, a clearance design is required in the upper movable bracket to ensure that the second floating electrode plate on the lower movable bracket can be positioned opposite the second transmitting electrode plate and the second receiving electrode plate on the upper base. This means that the position of the second floating electrode plate in the lower movable bracket is exposed to face the second transmitting electrode plate and the second receiving electrode plate on the upper base. Furthermore, since the distance between the second floating electrode plate and the second transmitting electrode plate and the second receiving electrode plate is related to signal strength, and a high-strength signal is beneficial for improving the sensitivity of the second detection unit, the position of the second floating electrode plate in the lower movable bracket can be protruded to reduce the distance between the second floating electrode plate and the second transmitting electrode plate and the second receiving electrode plate.

[0051] The above describes an implementation where both the first and second detection units are capacitive detection structures. Figure 3 The structural diagram of the device conceals the upper base and the components mounted on it. Figure 4 The device structure diagram of the upper base is concealed to facilitate direct observation of the first transmitting electrode plate and the first receiving electrode plate of the first detection unit, as well as the second transmitting electrode plate and the second receiving electrode plate of the second detection unit.

[0052] The setting parameters of each electrode plate in the first and second detection units are as follows: Figure 5 As shown, in the first direction ( Figure 5 (As shown in the X-axis direction), the edges of the first floating electrode 611 and the first transmitting electrode 612 are spaced by a certain distance d to ensure that the facing area of ​​the first floating electrode 611 and the first transmitting electrode 612 remains unchanged when the first floating electrode 611 reciprocates along the first direction. Furthermore, the width of the first floating electrode 611 in the first direction is set to w2 to ensure that the facing area of ​​the first floating electrode 611 and the first transmitting electrode 612 is sufficiently large, thereby ensuring that the first detection unit can have sufficient transmission signals and improving the signal strength detected in the first detection unit. The first detection unit has two first receiving electrodes 613, which are spaced apart in the first direction, both on the same plane, and both parallel to the first floating electrode 611. The edge of the first floating electrode 611 and the inner edges of the two first receiving electrodes 613 must maintain a certain distance 'a' to ensure that, when the first floating electrode 611 reciprocates along the first direction, the first floating electrode 611 and the two first receiving electrodes 613 always have a directly facing area. Furthermore, the width of the second floating electrode 621 in the first direction is set to w1, where w1 is less than w2.

[0053] In the second direction ( Figure 5(As shown in the Y-axis direction), there is a certain distance d between the edges of the second floating electrode plate 621 and the second emitting electrode plate 622 to ensure that the facing area of ​​the second floating electrode plate 621 and the second emitting electrode plate 622 remains unchanged when the second floating electrode plate 621 reciprocates along the second direction. Simultaneously, since the second floating electrode plate 621 also moves along the first direction of the lowering support (as shown in the Y-axis direction), Figure 5 The second floating electrode 621 reciprocates in the X-axis direction (as shown). In order to reduce the impact of the movement of the second floating electrode 621 in the first direction on the detection result of the second detection unit, it is necessary to avoid the sudden change of capacitance signal caused by the movement of the second floating electrode 621 in the first direction. Therefore, the second floating electrode 621 is at a certain distance f from the outer edge of the second transmitting electrode 622 and the outer edge of the second receiving electrode 623 in the first direction, so as to avoid the second floating electrode 621 from exceeding the projection range of the second transmitting electrode 622 and the second receiving electrode 623 when it reciprocates in the first direction. In addition, the second floating electrode plate 621 also includes a first part and a second part with different lengths in the second direction. The first part of the second floating electrode plate 621 is positioned opposite to the second transmitting electrode plate 622. Most of the area of ​​the second part of the second floating electrode plate 621 is opposite to the second receiving electrode plate 623, and the remaining second part with a width of L is opposite to the second receiving electrode plate 622. This ensures that the change in the area of ​​the opposite side between the second receiving electrode plate 622 and the second floating electrode plate 621 is linear when the plate moves back and forth in the first direction, which facilitates subsequent calculations.

[0054] The above descriptions of the setting parameters for each electrode plate in the first and second detection units refer to the setting parameters for each electrode plate in the initial state.

[0055] The detection principles for displacement changes in the first direction using the first detection unit and displacement changes in the second direction using the second detection unit are explained below:

[0056] Taking the first detection unit as an example, the capacitance formed by the first floating plate, the first emitting plate, and the first receiving plate can be considered as the sum of the capacitance formed by the first emitting plate and the first floating plate, and the capacitance formed by the first floating plate and the first receiving plate. The capacitance of each plate is calculated using the physical formula for a parallel plate capacitor: C = εS / 4πkd; where ε represents the dielectric constant of the medium, determined by the medium between the plates, such as air or water; and k represents the electrostatic constant, also known as the Coulomb constant, which indicates that the force between two point charges, each with a charge of 1C, separated by a distance of 1m in a vacuum is 8.987551 × 10⁹ N, i.e., k = 8.987551 × 10⁹ N·m. 2 / C; S represents the area (projected area) of the two electrodes facing each other; d represents the vertical distance between the two electrodes. Therefore, when the area of ​​the first floating electrode and the first receiving electrode changes, the capacitance signal generated by the capacitor formed by the first floating electrode, the first transmitting electrode, and the first receiving electrode changes accordingly. Based on the correspondence between the change in the area of ​​the electrodes and the change in the capacitance signal, the distance moved by the first floating electrode in the first direction can be determined. Since the first floating electrode, the upper moving bracket, the lower moving bracket, and the image sensor on the lower moving bracket move synchronously in the first direction, the distance moved by the image sensor in the first direction can be determined from the distance moved by the first floating electrode. The capacitance detection principle of the second detection unit is the same. The distance moved by the image sensor in the second direction can be obtained using the second detection unit. Combining the detection results of the first and second detection units, the movement of the image sensor in the plane can be determined, thereby achieving image stabilization control.

[0057] The number of receiving plates in the first detection unit and the second detection unit can each be set to two. When moving in the first direction, the first change in the area of ​​the first floating plate facing one of the first receiving plates and the second change in the area of ​​the first floating plate facing the other first receiving plate are the same. That is, the decrease in the area of ​​the first floating plate facing one of the first receiving plates and the increase in the area of ​​the first floating plate facing the other first receiving plate are the same. Alternatively, the increase in the area of ​​the first floating plate facing one of the first receiving plates and the decrease in the area of ​​the first floating plate facing the other first receiving plate are the same. This design facilitates subsequent differential calculation of the capacitance signal to correct or denoise the capacitance signal, eliminate noise that affects the accuracy of the calculation results caused by environmental factors or human operation factors, and improve the sensitivity of lens position movement control. The differential calculation formula can be: magnification factor * (CX11 - CX12) / (CX11 + CX12); where CX11 represents the capacitance signal formed by the first floating electrode and one of the first receiving electrodes, and CX12 represents the capacitance signal formed by the first floating electrode and the other first receiving electrode. The two second receiving electrodes in the second detection unit are also designed to facilitate subsequent differential calculation of the capacitance signal, allowing for correction or noise reduction, eliminating noise that affects the accuracy of the calculation results due to environmental factors or human operation, and improving the sensitivity of lens position movement control. The differential calculation of the capacitance signal in the second detection unit and the setting rules for the two receiving electrodes are similar to those described for the first detection unit, and will not be repeated here.

[0058] In addition, to further reduce the impact of movement in the first direction on the detection results of the second detection unit, the second floating electrode plate can be adjusted as follows: Figure 6 As shown, the second floating electrode 621 consists of three parts of different lengths in the second direction. One part of the second floating electrode 621 is correspondingly positioned with respect to the second receiving electrode 623, and the distance between the edge of this part and the edge of the second receiving electrode 623 is defined as I. Another part is correspondingly positioned with respect to the second transmitting electrode 622, and the distance between the edge of this part and the edge of the second receiving electrode 622 is defined as L. The values ​​of I and L are related to the maximum positive and negative travel in the first direction to ensure that, regardless of movement, the second receiving electrode and the second transmitting electrode are always aligned with their corresponding parts of the second floating electrode. The last part connects the above two parts, and the length of this connecting part in the second direction is the shortest. The length of the connecting part in the second direction can be set to be slightly smaller than the gap between the two second receiving electrodes to minimize the influence of the connecting part on the capacitor signal. Using... Figure 6 The electrode design shown is used to simulate and test the capacitance signals of the first and second detection units, resulting in the following: Figures 7 to 8 The simulation results are shown. Among them, Figure 7 The capacitance changes in the X-axis direction when the two first receiving plates in the first detection unit move a distance between -500μm and 500μm, respectively, under two conditions: no movement in the Y-axis direction and movement of 500μm in the Y-axis direction. Figure 8 This represents the capacitance change in the Y-axis direction when the two second receiving plates in the second detection unit move a distance between -500μm and 500μm, respectively, under two conditions: no movement in the X-axis direction and a movement of 500μm in the X-axis direction. Figures 7 to 8 As can be seen from the curve changes, changes in the two first receiving plates in the first detection unit along the Y-axis have almost no impact on the change in the generated capacitance value. Changes in the two second receiving plates in the second detection unit along the X-axis have a relatively small impact on the change in the generated capacitance value. After differential calculation of the generated capacitance value, the following results are obtained: Figures 9 to 10 The curve shown, Figure 9 This represents the numerical change of the two capacitors formed by the two first receiving plates and the first transmitting plate in the first detection unit after differential calculation. Figure 10 This represents the numerical change of the two capacitances formed by the two second receiving plates and the second transmitting plate in the second detection unit after differential calculation. Figures 9 to 10 It can be seen that the detection results obtained by the first detection unit after differential calculation are almost unaffected by the movement in the Y-axis direction, and the detection results obtained by the second detection unit after differential calculation are almost unaffected by the movement in the X-axis direction, thus solving the problem of crosstalk between the two directions.

[0059] When both the first and second detection units are capacitive detection units, the first and second emitting plates can be integrally formed. This way, it is only necessary to electrically connect the integrally formed emitting plate to the circuit board, which simplifies the wiring.

[0060] Besides capacitive detection units, the first and second detection units can also be electromagnetic detection units. Alternatively, to avoid interference between signals (electric or magnetic fields) generated by the same type of detection unit, the two detection units can be configured as different types of detection units. The following explanation uses an example where the first detection unit is a capacitive detection unit and the second detection unit is an electromagnetic detection unit:

[0061] like Figure 11 As shown, the configuration of the first detection unit is consistent with that of the capacitive detection unit described above, and will not be repeated here. The second detection unit includes: a detection magnet disposed on the lower movable bracket, and a first magnetic sensor 624 and a detection coil 626 disposed opposite to the detection magnet. The position of the first magnetic sensor 624 is fixed relative to the position of the upper base. When the lower movable bracket moves at least in the second direction, the distance between the detection magnet and the first magnetic sensor changes, thereby causing a change in the magnetic field detected by the first magnetic sensor 624. The detection accuracy of the capacitive detection unit and the electromagnetic detection unit will differ due to environmental influences. Higher-accuracy detection units can be configured for more frequent use, and lower-accuracy detection units for less frequent use, thus achieving a better overall detection effect for the device.

[0062] In addition, such as Figure 12 As shown, the motor anti-shake detection device further includes a drive unit; the drive unit includes a first magnet 81 and a second magnet 83 disposed on the lower moving bracket, and a first coil 82 disposed opposite to the first magnet 81, and a second coil 84 disposed opposite to the second magnet 83; wherein, the first magnet 81 and the first coil 82 are used to control the lower moving bracket to move in a first direction, and the second magnet 83 and the second coil 84 are used to control the lower moving bracket to move in a second direction. The second detection unit can reuse the magnetic field generated by the magnets and coils in the drive unit for detection to determine the movement of the image sensor, thereby reducing the cost of the second detection unit. Specifically, the second detection unit includes a second magnetic sensor disposed adjacent to the second magnet 83, the position of the second magnetic sensor being relatively fixed relative to the position of the upper base; when the lower moving bracket moves at least in the second direction, the distance between the second magnet and the second magnetic sensor changes.

[0063] The first and second magnetic sensors can be sensors used for magnetic field detection, such as Hall sensors or TMR sensors.

[0064] The coils and magnetic sensors described above can be mounted on the upper base, the lower base, or the fixed parts extending from the upper base and the lower base, as long as the positions of the coils and magnetic sensors relative to the upper base or the lower base are fixed.

[0065] Another feasible embodiment of this utility model relates to a shake-stabilizing motor, such as... Figure 13 As shown, the image stabilization motor includes: the aforementioned motor image stabilization detection device 10, lens 20, and light-transmitting film 30; during imaging, external light passes through the light-transmitting film 30 and lens 20 in sequence and reaches the motor image stabilization detection device 10.

[0066] Additionally, due to the thickness limitations of mobile phones, a prism can be used to change the direction of incident light, causing the light to travel parallel to the surface of the phone screen, thereby altering the focal length. When the image stabilization motor is a periscope motor that includes a prism, such as... Figure 14 As shown, the device includes: the aforementioned motor-driven image stabilization detection device 10, a lens 20, a light-transmitting plate 30, and a prism 40. Light passes through the light-transmitting plate 30, is refracted by the prism 40, enters the lens 20, and then is refracted again by a second prism 40 to reach the image sensor of the motor-driven image stabilization detection device 10. The use of two prisms to change the direction of light provides sufficient movement space for the image sensor. If the image sensor has enough movement space, only one prism is needed to change the direction of light propagation once. Furthermore, the two prism refractions prevent image flipping and ensure correct imaging direction.

[0067] Compared with related technologies, the anti-shake motor provided in this embodiment of the utility model is equipped with the motor anti-shake detection device provided in the aforementioned embodiment. Therefore, it also has the technical effects provided in the aforementioned embodiment, which will not be elaborated here.

[0068] Another feasible embodiment of this utility model relates to an electronic device, including the above-mentioned motor anti-shake detection device or the above-mentioned anti-shake motor.

[0069] Compared with related technologies, the electronic device provided in this embodiment of the present invention is equipped with the motor anti-shake detection device or anti-shake motor provided in the aforementioned embodiments. Therefore, it also has the technical effects provided in the aforementioned embodiments, which will not be elaborated here.

[0070] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A detection device for motor anti-shake, characterized in that, The application comprises: a containing space formed by the upper base and the lower base, and an upper moving support and a lower moving support arranged in the containing space in sequence according to the direction of light incidence; the upper moving support is only displaceable in the first direction relative to the upper base; the lower moving support is displaceable in both the first direction and the second direction relative to the upper base, and the lower moving support is in abutment with the upper moving support in the first direction, the movement of the lower moving support in the first direction drives the corresponding movement of the upper moving support, and the first direction is perpendicular to the second direction; the detection device for motor anti-shake further comprises an image sensor fixed to the lower moving support and moving with the lower moving support; the detection device for motor anti-shake further comprises a first detection unit arranged on the upper moving support and a second detection unit arranged on the lower moving support; the first detection unit is used for detecting the movement in the first direction, and the second detection unit is used for detecting the movement in the second direction; the detection device for motor anti-shake further comprises a processing unit used for carrying out shake correction according to the detection results of the first detection unit and the second detection unit.

2. The detection device of claim 1, wherein the first detection unit comprises a first floating electrode plate fixed to the upper moving support, and a first emitter plate and a first receiver plate fixed to the upper base, the first floating electrode plate and the first emitter plate and the first receiver plate are oppositely arranged, and the projection of the first floating electrode plate towards the direction of the upper base overlaps with the first emitter plate and the first receiver plate; when the upper moving support moves in the first direction, the relative area between the first floating electrode plate and the first receiver plate changes with the movement.

3. The detection device of claim 1, wherein the second detection unit comprises a second floating electrode plate fixed to the lower moving support, and a second emitter plate and a second receiver plate fixed to the upper base, the second floating electrode plate and the second emitter plate and the second receiver plate are oppositely arranged, and the projection of the second floating electrode plate towards the direction of the upper base overlaps with the second emitter plate and the second receiver plate; when the lower moving support moves in at least the second direction, the relative area between the second floating electrode plate and the second receiver plate changes with the movement.

4. The detection device of claim 2, wherein the second detection unit comprises a detection magnet arranged on the lower moving support, and a first magnetic sensor oppositely arranged with the detection magnet, and the position of the first magnetic sensor is fixed relative to the position of the upper base; when the lower moving support moves in at least the second direction, the distance between the detection magnet and the first magnetic sensor changes.

5. The apparatus of claim 1, wherein The application further comprises: a driving unit; The driving unit comprises a first magnet and a second magnet arranged on the lower moving bracket, a first coil arranged opposite to the first magnet, and a second coil arranged opposite to the second magnet; wherein the first magnet and the first coil are used to control the lower moving bracket to move in the first direction, and the second magnet and the second coil are used to control the lower moving bracket to move in the second direction.

6. The motor-shake detection apparatus according to claim 5, wherein The second detection unit comprises a second magnetic sensor arranged adjacent to the second magnet, and the position of the second magnetic sensor is fixed opposite to the position of the upper base. When the lower moving bracket moves at least in the second direction, the distance between the second magnet and the second magnetic sensor changes.

7. The motor-shake detection apparatus according to claim 1, wherein Further comprising: a fixed rolling groove arranged on the surface of the upper base facing the upper moving bracket, and the rolling groove direction of the fixed rolling groove is consistent with the first direction; The upper moving bracket comprises a first rolling groove arranged opposite to the position of the fixed rolling groove, the rolling groove direction of the first rolling groove is consistent with the rolling groove direction of the fixed rolling groove, and a first ball is arranged in the rolling groove of the fixed rolling groove and the first rolling groove.

8. The motor-anti-shake detection apparatus according to claim 7, wherein The number of the fixed rolling grooves is three, and the three fixed rolling grooves are respectively fixed at the positions of any three corners of the upper base.

9. A de-jitter motor, characterized by, Comprise: The motor anti-shake detection device, the lens and the light transmission sheet according to any one of claims 1 to 8; When imaging, external light rays pass through the light transmission sheet and the lens in turn, and reach the motor anti-shake detection device.

10. An electronic device, comprising: Comprise: The motor anti-shake detection device according to any one of claims 1 to 8, or the anti-shake motor according to claim 9.

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