Prism motor structure, camera and electronic equipment

Abstract

The utility model relates to the technical field of optical images, and discloses a prism motor structure, a camera and electronic equipment, the prism motor structure comprises a base, a prism, a prism carrier, a lens, a first driving device, a second driving device and a third driving device; a first polar plate further extends from the prism carrier; a second polar plate opposite to the first polar plate is arranged in the bottom plate; the first pole plate and the second pole plate form a first capacitor; the first driving device, the second driving device and the third driving device are arranged in the groove; the second driving device is used for driving the prism carrier to rotate by taking a second direction as an axis; the first driving device is used for driving the lens to move along a first direction; the third driving device is used for driving the prism carrier to rotate by taking a third direction as an axis; a first sensor is arranged in the first driving device; and / or a second sensor is arranged in the third driving device; therefore, the detection precision of the prism motor and the design cost of the prism motor are both considered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging, in particular to a prism motor structure, a camera and an electronic device. BACKGROUND

[0002] At present, with the development of science and technology, the camera has become an indispensable part of the electronic device, and the camera generally occupies a large volume. In order to balance the thinness of the electronic device and the focusing distance of the camera, a prism motor is designed in the camera at the present stage. The prism motor reflects the incident light into the lens through the prism, and the lens projects the light onto the photosensitive chip through the movement of the zoom lens, thereby realizing the projection of the image.

[0003] However, the existing prism motor cannot balance the detection accuracy of the prism motor and the design cost of the prism motor. CONTENT OF THE INVENTION

[0004] The purpose of the embodiments of the present application is to provide a prism motor structure, a camera and an electronic device, so as to balance the detection accuracy of the prism motor and the design cost of the prism motor.

[0005] In order to solve the above technical problems, the embodiments of the present application provide a prism motor structure, which comprises a base, a prism, a prism carrier, a lens, a first driving device, a second driving device and a third driving device. The base comprises a bottom plate and a side wall arranged around the edge of the bottom plate. The bottom plate and the side wall form a groove. The prism carrier and the lens are arranged in the base along a first direction. The prism carrier has a second surface which is not perpendicular to a first surface of the bottom plate, the first surface is located in the groove, and the prism is arranged on the second surface. The prism carrier further extends a first polar plate. The bottom plate is built-in with a second polar plate arranged opposite to the first polar plate. The first polar plate and the second polar plate form a first capacitor. The first driving device, the second driving device and the third driving device are arranged in the groove. The second driving device is used to drive the prism carrier to rotate around a second direction as an axis, and the first capacitor changes. The second direction is perpendicular to the first direction and parallel to the first surface. The first driving device is used to drive the lens to move along the first direction, and the third driving device is used to drive the prism carrier to rotate around a third direction as an axis. The third direction is perpendicular to the first direction and perpendicular to the second direction. The first driving device is internally provided with a first sensor, and the first sensor is used to detect the rotation angle of the prism carrier around the first direction as an axis. And / or, the third driving device is internally provided with a second sensor, and the second sensor is used to detect the rotation angle of the prism carrier around the third direction as an axis.

[0006] The embodiment of the present application further provides a camera, comprising the prism motor structure.

[0007] The embodiment of the present application further provides an electronic device, comprising the camera.

[0008] In some embodiments, the first electrode plate is arranged opposite to the first surface, and the second electrode plate is embedded on the first surface of the bottom plate.

[0009] In some embodiments, the side wall comprises a first side wall perpendicular to the first direction; the first electrode plate is arranged opposite to the first side wall, and the second electrode plate is embedded on the first side wall.

[0010] In some embodiments, the side wall comprises a first side wall perpendicular to the first direction; the first driving device comprises a first magnet and a first coil surrounding the first sensor, the first magnet is arranged on the prism carrier, the first magnet is arranged opposite to the first side wall, and the first coil is embedded on the first side wall.

[0011] In some embodiments, the second driving device comprises a second magnet and a second coil, the second magnet is arranged on the prism carrier, the second magnet is arranged opposite to the first side wall, and the second coil is embedded on the first side wall.

[0012] In some embodiments, the third driving device comprises a third magnet and a third coil surrounding the second sensor, the third magnet is arranged on the prism carrier, the third magnet is arranged opposite to the bottom plate, and the third coil is embedded on the bottom plate.

[0013] In some embodiments, the first electrode plate is an emitter plate, and the second electrode plate is a receiver plate; the number of the first electrode plates and the number of the second electrode plates are both two.

[0014] In some embodiments, the number of the first driving devices is two, and / or the number of the third driving devices is two.

[0015] The technical scheme provided by the embodiment of the present application has at least the following advantages:

[0016] In this embodiment, the rotation angle of the prism carrier in the second direction is detected using capacitive sensing in the prism motor, while the rotation angle of the prism carrier in the first direction and / or in the third direction is detected using sensors. This combination of capacitive and Hall effect sensing allows for capacitive sensing only in the second direction, where user requirements are higher, while sensor sensing is used in other directions. This achieves multi-axis image stabilization for the prism motor and improves the rotational accuracy and linearity in the second direction. It avoids the poor accuracy problem caused by using sensors in the entire prism motor and the high cost problem caused by using only capacitive sensing. At the same time, sensor sensing and capacitive sensing do not interfere with each other, thus achieving higher image stabilization requirements for the prism motor and reducing the complexity of the prism carrier structure, balancing the accuracy of prism motor detection and the design cost of the prism motor. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of a prism motor in related technologies;

[0019] Figure 2 This is a schematic diagram of the structure of the base of a prism motor according to an embodiment of this application;

[0020] Figure 3 This is one of the structural schematic diagrams of the prism carrier of a prism motor according to an embodiment of this application;

[0021] Figure 4 This is a second schematic diagram of the structure of the prism carrier of the prism motor according to an embodiment of this application;

[0022] Figure 5 This is one of the structural schematic diagrams of a prism motor according to an embodiment of this application;

[0023] Figure 6 This is a second schematic diagram of the structure of a prism motor according to an embodiment of this application;

[0024] Figure 7 This is a top view of the first electrode plate and the second electrode plate according to an embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the structure at the bottom of a prism motor according to an embodiment of this application;

[0026] Figure 9 This is a third schematic diagram of the structure of a prism motor according to an embodiment of this application;

[0027] Figure 10 This is the fourth schematic diagram of the structure of a prism motor according to an embodiment of this application. Detailed Implementation

[0028] As can be seen from the background technology, existing prism motors cannot simultaneously achieve both the detection accuracy and the design cost of prism motors.

[0029] like Figure 1 The diagram shows the principle of the prism motor. Taking the incident light along the X-axis as an example, the prism carrier 101 is placed in the prism base 102 and can rotate relative to the prism base 102 around the X and Y axes. The prism 103 is attached to the prism carrier 102 and rotates with the prism carrier 102 along the X-axis (head-shaking) and Y-axis (head-nodding). Light enters the prism 103 through the lens lens 106, and is reflected by the reflective lens 107 of the prism structure into the zoom lens 104. Finally, the light is projected onto the photosensitive chip element 105 through the movement of the lens 104, achieving telephoto image capture. The rotation center of the prism is the intersection of the X, Y, and Z rotation axes in the structural design. In practical applications, due to assembly or structural design, the rotation axes may have some offset, causing the rotation center to not coincide. However, this does not deviate from the design of this scheme, and the movement direction of the lens is parallel to the Z-axis. The prism can rotate around the X-axis (vertical axis in the diagram), Y-axis (perpendicular to the plane and not shown), and Z-axis (horizontal axis / direction axis of lens movement in the diagram).

[0030] However, current periscope prism rotation angle measurement typically uses magnetic field sensors to detect changes in the magnetic field and thus control the prism rotation. But as users require image stabilization, periscope prisms usually need 2-axis or 3-axis omnidirectional image stabilization. Therefore, multiple sets of magnetic field sensors are required. Since rotation on one axis will affect the measurement of the rotation angle on another axis, the crosstalk between the magnetic field sensors on each axis is relatively large, which will affect the detection and control accuracy of the prism.

[0031] To further address the crosstalk issue between magnetic field detection sensors on different axes, a capacitance detection scheme has been proposed. This scheme detects the prism's rotation angle by measuring changes in the capacitance of the electrode plates. Compared to the magnetic field detection scheme, the capacitance detection scheme offers advantages in terms of high sensitivity and linearity, with accuracy and sensitivity far exceeding those of the magnetic field detection sensor. However, due to the need for multi-axis image stabilization, the capacitance detection scheme requires multiple pairs of electrode plates. Due to space limitations and considering crosstalk between the electrode plates on different axes, the electrode plates need to be staggered. Furthermore, the electrode plates and magnet coils often need to be staggered as well, increasing the structural complexity of the periscope prism motor and consequently raising design and manufacturing costs.

[0032] Through analysis and research, the inventors discovered that in actual imaging, people holding mobile phones often experience up-and-down shaking, so the requirements for the nodding (Y-axis) direction of the prism are relatively high. Therefore, the sensitivity of the nodding direction must be greater than that of the other two axes, while minimizing the influence of the rotation of other axes on the nodding direction.

[0033] To address the aforementioned technical problems, this application provides a prism motor structure, comprising: a base, a prism, a prism carrier, a lens, a first driving device, a second driving device, and a third driving device; the base includes a bottom plate and a sidewall surrounding the edge of the bottom plate; the bottom plate and the sidewall form a groove; the prism carrier and the lens are arranged in the base along a first direction; the prism carrier has a second surface that is not perpendicular to the first surface of the bottom plate, the first surface being located within the groove, and the prism being disposed on the second surface; the prism carrier further extends a first electrode plate; the bottom plate houses a second electrode plate disposed opposite to the first electrode plate; the first electrode plate and the second electrode plate form a first capacitor; the first driving device and the second driving device... The first drive device and the third drive device are disposed in the groove; the second drive device is used to drive the prism carrier to rotate about the second direction as an axis, and the first capacitor changes; the second direction is perpendicular to the first direction and parallel to the first surface; the first drive device is used to drive the lens to move along the first direction, and the third drive device is used to drive the prism carrier to rotate about the third direction as an axis; the third direction is perpendicular to the first direction and perpendicular to the second direction; the first drive device is provided with a first sensor, which is used to detect the rotation angle of the prism carrier about the first direction as an axis; and / or, the third drive device is provided with a second sensor, which is used to detect the rotation angle of the prism carrier about the third direction as an axis.

[0034] In this embodiment, the rotation angle of the prism carrier in the second direction is detected using capacitive sensing in the prism motor, while the rotation angle of the prism carrier in the first direction and / or in the third direction is detected using sensors. This combination of capacitive and Hall effect sensing allows for capacitive sensing only in the second direction, where user requirements are higher, while sensor sensing is used in other directions. This achieves multi-axis image stabilization for the prism motor and improves the rotational accuracy and linearity in the second direction. It avoids the poor accuracy problem caused by using sensors in the entire prism motor and the high cost problem caused by using only capacitive sensing. At the same time, sensor sensing and capacitive sensing do not interfere with each other, thus achieving higher image stabilization requirements for the prism motor and reducing the complexity of the prism carrier structure, balancing the accuracy of prism motor detection and the design cost of the prism motor.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application 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 provided in the various embodiments of this application to help readers 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. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0036] One embodiment of this application relates to a prism motor structure, such as... Figure 2 As shown, this is a schematic diagram of the structure of the prism motor base in this embodiment. Figure 3 As shown, this is one of the structural schematic diagrams of the prism carrier of the prism motor in this embodiment. Figure 4 As shown, this is the second schematic diagram of the prism carrier of the prism motor in this embodiment. Figure 5 As shown, this is one of the structural schematic diagrams of the prism motor in this embodiment. Figure 6 The diagram shown is the second structural schematic of the prism motor in this embodiment.

[0037] The prism motor in this embodiment includes: a base (not shown), a prism 21, a prism carrier (not shown), a lens (not shown), a first driving device (including a first magnet 228 and a first coil 229), a second driving device (including a second magnet 225 and a second coil 227), and a third driving device (including a third magnet 224 and a third coil 226).

[0038] Specifically, the base includes a base plate 201 and sidewalls surrounding the edge of the base plate 201; the sidewalls include a first sidewall 202 perpendicular to the first direction (Z), a second sidewall 203 perpendicular to the second direction (Y), and a third sidewall 204 perpendicular to the second direction (Y), with the second sidewall 203 and the third sidewall 204 being disposed opposite to each other; the base plate 201 and the sidewalls form a groove; the prism carrier and lens are arranged in the base along the first direction (Z), that is, the prism carrier and lens are disposed in the groove.

[0039] The prism carrier has a second surface 221 that is not perpendicular to the first surface 2011 of the base plate. The first surface 2011 is located within a groove, and the prism 21 is disposed on the second surface 221, meaning the prism 21 is attached to the second surface 221 of the prism carrier and rotates with the rotation of the prism carrier assembly. The prism carrier also extends a first electrode plate 222, which is disposed opposite to the first surface 2011. The base plate 201 contains a second electrode plate 223 disposed opposite to the first electrode plate 222; the first electrode plate 222 and the second electrode plate 223 form a first capacitor. A spring contact 30 is disposed on the prism carrier. The first electrode plate 222 is electrically connected to the spring contact 30 through the prism carrier, and the spring contact 30 is connected to a chip through corresponding pins. The chip detects the capacitance signal. In the prism carrier, the first electrode plate can be attached to the prism carrier or integrally formed with it; that is, the prism carrier and the first electrode plate are connected by plastic casting to form a single structure.

[0040] Specifically, the first driving device, the second driving device, and the third driving device are disposed within the groove. The first driving device includes a first magnet 228 and a first coil 229; the second driving device includes a second magnet 225 and a second coil 227; and the third driving device includes a third magnet 224 and a third coil 226. The first magnet 228, the second magnet 225, and the third magnet 224 are all connected to the prism carrier. The first magnet 228, the second magnet 225, and the third magnet 224 can be attached to the prism carrier or integrally formed with the prism carrier; that is, the prism carrier, the first magnet 228, the second magnet 225, and the third magnet 224 are connected by plastic casting to form a single integrated structure.

[0041] The second driving device is used to drive the prism carrier to rotate about the second direction (Y) as the axis, and the first capacitor changes; the second direction is perpendicular to the first direction and parallel to the first surface 2011; the first driving device is used to drive the lens to move along the first direction (Z), and the third driving device is used to drive the prism carrier to rotate about the third direction (X) as the axis; the third direction (X) is perpendicular to the first direction (Z) and perpendicular to the second direction (Y), and is marked in the figure with the first direction as the Z axis, the second direction as the Y axis, and the third direction as the X axis.

[0042] In practical applications, in the initial position, the width direction of the first electrode plate 222 is parallel to the Z-axis, and the length direction of the first electrode plate 222 is parallel to the Y-axis. Two first electrode plates 222 are arranged, one in front and one behind, for subsequent differential processing. Furthermore, in this case, all the first electrode plates 222 are integrally formed with the prism carrier, i.e., they are the same metal structural component. Therefore, all the first electrode plates 222 are the same conductor, connected to sheet metal wiring or FPC (Flexible Printed Circuit) via spring contacts 30, and then connected to the transmitter of the IC (Integrated Circuit) chip via sheet metal wiring / FPC. This embodiment uses spring contacts 30 for connection, ensuring no interruption and utilizing the elasticity of the spring contacts 30 to achieve the function of resetting the prism carrier. In other designs, the prism carrier and the first electrode plate 222 can be independent of each other and not connected as a single conductor. However, the prism carrier and the first electrode plate 222 are still injection molded into the assembly. The prism carrier does not function as a wire connection; the individual first electrode plates 222 need to be connected together via other conductors, and then connected to the IC terminal via a spring contact 30 and sheet metal wire or FPC. Furthermore, a second magnet 225 is provided at the rear of the prism carrier. The second magnet 225 is a pair of magnets forming an N and S pole, used to drive the prism carrier to rotate around the Y-axis. At the bottom of the prism carrier, between the two first electrode plates 222, two pairs of third magnets 224 are provided. The third magnets 224 are also pairs of magnets forming an N and S pole, used to drive the prism carrier to rotate around the X-axis.

[0043] refer to Figure 5 The first driving device includes a first sensor 31, which detects the rotation angle of the prism carrier in a first direction (Z). Specifically, the first driving device includes a first magnet 228 and a first coil 229 surrounding the first sensor 31. The first magnet 228 is disposed on the prism carrier and is positioned opposite to the first sidewall 202. The first coil 229 is embedded in the first sidewall 202. The second driving device includes a second magnet 225 and a second coil 227. The second magnet 225 is disposed on the prism carrier and is positioned opposite to the first sidewall 202. The second coil 227 is embedded in the first sidewall 202. That is, the first driving device and the second driving device are located on the same side.

[0044] Specifically, the first magnet 228 of the first driving device can serve as both a driving magnetic field and a magnetic field for the detection of the first sensor 31. Moreover, the capacitance signal formed by the first electrode plate 222 and the second electrode plate 223 and the magnetic field detection sensor signal are independent of each other, thereby achieving higher anti-shake requirements for the prism motor and reducing the complexity of the prism carrier structure, which can reduce the size and miniaturize the capacitor motor.

[0045] Specifically, there are two first driving devices. Since the first driving device and the second driving device are located on the same side, along the second direction (Y), the two first driving devices are respectively located on both sides of the second driving device, that is, the two first coils 229 are respectively located on both sides of the second coil 227, and the two first magnets 228 are respectively located on both sides of the second magnet 225.

[0046] Specifically, the first electrode 222 is the transmitting electrode, and the second electrode 223 is the receiving electrode; there are two of each of the first electrode 222 and the second electrode 223. This embodiment, by setting up a capacitor structure composed of two pairs of first electrode 222 and second electrode 223, allows for a differential algorithm to be performed on the two capacitors to obtain the selection angle of the prism carrier along the second direction (Y) as the axis, thereby improving the accuracy of prism motor detection.

[0047] refer to Figure 5 A first sensor 31, such as a Hall element or TMR (Tunneling Magnetoresistance), is set in the middle of the first coil 229. There are two first sensors 31, which are symmetrically arranged with the two first magnets 228 along the direction parallel to the Y-axis. By calculating the magnetic field information obtained by the two first sensors 31, the movement distance of the prism carrier on the Z-axis can be calculated. The two first sensors 31 are set up to perform differential processing to eliminate the influence of rotation of other axes such as the X-axis and Y-axis on the Z-axis.

[0048] Specifically, since the space between the two first electrode plates 222 also needs to accommodate the ball bearings required for prism rotation, the plane may not be large enough to accommodate the coil and sensor. Therefore, in this embodiment, the first electrode plates 222 and the first sensor 31 are respectively placed on two separate planes. This allows for sufficient space between the two first electrode plates 222 for the ball bearings, further reducing the size of the prism motor and meeting the requirement for a smaller motor.

[0049] like Figure 7 The diagram shown is a top view of the first and second electrode plates. In the second direction (Y), the length of the first electrode plate 222 is less than the length of the second electrode plate 223 to improve the detection accuracy.

[0050] refer to Figure 7The first electrode 222 and the second electrode 223 have a certain offset, shift. The rotation of the electrodes is generally within 2 degrees, and the maximum projected displacement after rotation is generally within 0.2 mm. During the counterclockwise rotation of the first electrode 222 around the Y-axis, the distance between the projected areas of the first electrode 222 and the second electrode 223 decreases, while the average distance between the first electrode 222 and the second electrode 223 increases, thereby accelerating the first capacitance C between the pair of first electrodes 222 and the second electrode 223. X11 Similarly, as the projected area between the first plate 222 and the second plate 223 increases, the average spacing increases, making the first capacitor C smaller. X22 By increasing the capacitance and performing subsequent differential processing on the two capacitors, the angle of the prism in the Z-axis direction can be detected in real time. In this embodiment, the differential capacitance is: magnification factor × (C...). X11 -C X22 ) / (C X11 +C X22 This can offset the effect of the denominator 4πkd in the capacitance formula C=εS / 4πkd.

[0051] It should be noted that, in order to reduce crosstalk to the electrode structure caused by X-axis rotation, the length of the second electrode 223 should be slightly greater than the length of the corresponding first electrode 222. This ensures that the projected areas of the first electrode 222 and the second electrode 223 remain as constant as possible during X-axis rotation.

[0052] Another embodiment of this application relates to a prism motor structure, such as Figure 8 The diagram shown is a structural schematic of the bottom of the prism motor in this embodiment. The difference between this embodiment and the previous embodiment is that the first driving device in this embodiment does not have a sensor, while the third driving device does. Other structures are largely the same as in the previous embodiment, and will not be described again here to avoid repetition.

[0053] Continue to refer to Figure 2 , Figure 6 , Figure 8 In this embodiment, the third driving device is internally equipped with a second sensor 32, which is used to detect the rotation angle of the prism carrier about a third direction (X) as the axis. Specifically, the third driving device includes a third magnet 224 and a third coil 226 surrounding the second sensor. The third magnet 224 is disposed on the prism carrier and is disposed opposite to the first surface 2011 of the base plate 201. The third coil 226 is built into the base plate 201.

[0054] Specifically, the third magnet 224 of the third driving device can serve as both a driving magnetic field and a magnetic field for the detection of the second sensor 32. Moreover, the capacitance signal formed by the first electrode plate 222 and the second electrode plate 223 and the magnetic field detection sensor signal are independent of each other, thereby achieving higher anti-shake requirements for the prism motor and reducing the complexity of the prism carrier structure. This can reduce the size and miniaturization of the capacitor motor, while taking into account the detection accuracy of the prism motor and the design cost of the prism motor.

[0055] Specifically, the third driving device, the capacitor structure formed by the first electrode plate 222 and the second electrode plate 223 are arranged on the same side. The third magnet 224 and the first electrode plate 222 are both arranged on the first surface of the prism carrier near the bottom plate. The third coil 226 and the second electrode plate 223 are both arranged on the bottom plate. Since there are two of each of the first electrode plate 222, the second electrode plate 223, the third coil 226 and the third magnet 224, the two third magnets 224 are arranged between the two first electrode plates 222, and the two third coils 226 are arranged between the two second electrode plates 223. The two third coils 226 are arranged along the second direction (Y), and the two third magnets 224 are also arranged along the second direction (Y).

[0056] refer to Figure 8 Two third coils, corresponding to the third magnets, are installed on the base plate of the base. These coils, one on the left and one on the right, are used to drive the rotation of the prism carrier in the X-axis direction. A second sensor 32, such as a Hall element or TMR, is positioned between the third coils. Two second sensors 32 are symmetrically arranged with the two third magnets along a direction parallel to the Y-axis. By calculating the magnetic field information acquired by the two second sensors 32, the rotation angle of the prism carrier in the X-axis can be calculated. The magnetic field information acquired by the two second sensors 32 can also be differentially processed to eliminate the influence of Y-axis rotation on the X-axis. Specifically, taking the Hall element voltage signal as an example: Assuming that at the initial position, the Hall voltage signal of one second sensor 32 is V1 and the Hall voltage signal of the other second sensor 32 is V2, due to the symmetrical setting, the magnetic field changes measured by the two sensors are in opposite directions and have a 180° phase difference, so V1 = -V2. When the prism carrier rotates around the X-axis, the voltage signals output by the two second sensors 32 are differentially modal, so a differential signal Vdiff = V1 - V2 can be constructed. Since the Y-axis also rotates at the same time as the X-axis, it will cause crosstalk to the Hall element signal. Assuming that the crosstalk signal of one second sensor 32 is V1′ and the crosstalk signal of the other second sensor 32 is V2′, but since the signals of the two sensors change in the same way as the Y-axis rotates, V1′ = V2′. Therefore, the rotated Vdiff′ = (V1 + V1′) - (V2 + V2′) = Vdiff, the interference signal is canceled out, the purpose of removing crosstalk is achieved, and the detection can be made more accurate.

[0057] It is worth mentioning that the sector magnet used in this solution is because the magnetic field strength of the sector magnet changes gradually within the detection area when it rotates, avoiding measurement errors caused by sudden changes in the magnetic field. The shape of the sector magnet makes the magnetic field change more uniform along the rotation path, thereby obtaining a near-linear magnetic signal. However, this does not mean that there are restrictions on the shape of the magnet. A cuboid magnet can also be used in the design, as long as it meets the detection requirements of the sensor.

[0058] Another embodiment of this application relates to a prism motor structure, such as Figure 9 The diagram shown is the third structural schematic of the prism motor in this embodiment. The difference between this embodiment and the previous embodiment is that the first driving device in this embodiment is equipped with a sensor, and the third driving device is also equipped with a sensor. Other structures are largely the same as the previous embodiment, and will not be described again here to avoid repetition.

[0059] Continue to refer to Figure 2 , Figure 9 The first drive device is equipped with a first sensor 31, which is used to detect the rotation angle of the prism carrier in the first direction (Z). The third drive device is equipped with a second sensor 32, which is used to detect the rotation angle of the prism carrier about the third direction (X) as the axis.

[0060] Specifically, the first driving device includes a first magnet 228 and a first coil 229 surrounding the first sensor 31. The first magnet 228 is disposed on the prism carrier and is disposed opposite to the first sidewall 202. The first coil 229 is built into the first sidewall 202.

[0061] The third driving device includes a third magnet 224 and a third coil 226 surrounding the second sensor 32. The third magnet 226 is disposed on the prism carrier, the third magnet 224 is disposed opposite to the base plate 201, and the third coil 226 is built into the base plate 201.

[0062] Specifically, the first magnet 228 of the first driving device and the third magnet 224 of the third driving device can serve as driving magnetic fields and also provide magnetic fields for the detection of the first sensor 31 and the second sensor 32. Moreover, the capacitance signal formed by the first electrode plate 222 and the second electrode plate 223 and the magnetic field detection sensor signal are independent of each other, thereby achieving higher anti-shake requirements for the prism motor and reducing the complexity of the prism carrier structure. This can reduce the size and miniaturization of the capacitor motor, while taking into account the detection accuracy of the prism motor and the design cost of the prism motor.

[0063] In this embodiment, the rotation directions of the prism carrier need to be detected. A set of capacitors and two sets of magnetic field sensors are used to detect the rotation angles of the three axes. A first electrode plate 222 and a second sensor 32 are set at the bottom of the prism carrier for detecting rotation along the Y and X axes, respectively. A third magnet 224 is set at the bottom of the prism carrier for driving rotation along the X axis. A third coil 226 is set on the base plate 201 corresponding to the third magnet 224, and a second sensor 31 is set in the middle of the third coil 226 for driving and detecting rotation along the X axis. A second magnet 225 is set in the middle of the rear part of the prism carrier for driving rotation along the Y axis. A first magnet 228 is set on both sides of the rear part of the prism carrier. A first coil 229 is set on the first sidewall 202 corresponding to the first magnet 228, and a first sensor 31 is set in the middle of the first coil 229 for driving and detecting rotation along the Z axis.

[0064] This embodiment improves the accuracy of prism motor detection by incorporating sensors in both the first and third driving devices to detect the first direction (Z) and the third direction (X), while detecting the second direction (Y) via capacitance.

[0065] Another embodiment of this application relates to a prism motor structure, such as Figure 10 The diagram shown is the fourth structural schematic of the prism motor in this embodiment. The difference between this embodiment and the previous embodiment is that the first electrode plate is not opposite to the base plate and the second electrode plate is not disposed on the base plate. In this embodiment, the first electrode plate is opposite to the first sidewall, and the second electrode plate is built into the first sidewall. Other structures are roughly the same as in the previous embodiment, and will not be described again here to avoid repetition.

[0066] refer to Figure 2 , Figure 10 In this embodiment, the first electrode plate 222 is disposed opposite to the first sidewall 202, and the second electrode plate 223 is embedded in the first sidewall 203.

[0067] Specifically, in this embodiment, there are two first pole plates 222 and two second pole plates 223. In the third direction (X), the two first pole plates 222 are located on both sides of the second magnet 225, and the two second pole plates 223 are located on both sides of the second coil 227.

[0068] Specifically, in this embodiment, the capacitor structure formed by the first driving device, the second driving device, the first electrode plate 222, and the second electrode plate 223 is disposed on the same side. That is, the first magnet 228, the second magnet 225, and the first electrode plate 222 are disposed on the side of the prism carrier near the first sidewall 202, and the first coil 229, the second coil 227, and the second electrode plate 223 are disposed on the first sidewall. Since there are two of each of the first electrode plate 222, the second electrode plate 223, the first magnet 228, and the first coil 229, the two first magnets 228 are disposed between the two first electrode plates 222, and the two first coils 229 are disposed between the two second electrode plates 223. The two first coils 229 are arranged along the second direction (Y), and the two first magnets 228 are also arranged along the second direction (Y).

[0069] Specifically, the third driving device in this embodiment includes a third magnet and a third coil. The third magnet is disposed on the prism carrier and is disposed opposite to the base plate. The third coil is built into the base plate.

[0070] refer to Figure 10 In this embodiment, the first electrode plate 222 located at the bottom of the prism carrier in the above embodiment is changed to the rear part of the prism carrier, and two first electrode plates 222 are set at the top and bottom for Y-axis rotation detection. In the initial position, the width direction of the first electrode plate 222 is parallel to the X-axis, and the length direction of the first electrode plate 222 is parallel to the Y-axis. The two first electrode plates 222 can respectively transmit two first capacitor signals for subsequent differential processing. In addition, a second magnet 225 is set in the middle of the rear part of the prism carrier, between the two first electrode plates 222, for driving the prism carrier in the Y direction. Two first magnets 228 are set on both sides of the rear part of the prism carrier, between the two first electrode plates 222. The first magnets 228 are a pair of magnets with N and S poles, for driving the prism carrier in the Z direction.

[0071] Specifically, in this embodiment, the first driving device is equipped with a first sensor 31, that is, the first coil 229 surrounds the first sensor 31 to detect the rotation angle of the prism carrier in the first direction (Z). In other embodiments, only the third driving device may be equipped with a second sensor, or the first driving device and the third driving device may be equipped with the first sensor and the second sensor respectively. That is, the presence of a sensor in either the first driving device or the third driving device is within the protection scope of this embodiment.

[0072] This application uses a capacitance + magnetic field detection method. Compared with the single capacitance detection method, this embodiment can reduce the structural complexity of the prism motor due to the simple arrangement of the magnetic field sensor. Compared with single magnetic field detection, this embodiment can improve detection accuracy and linearity. In addition, the capacitance and sensor detection do not interfere with each other, further improving the accuracy of detection.

[0073] Another aspect of this application provides a camera, including: a prism motor structure as described in any of the above embodiments.

[0074] It is not difficult to see that this embodiment corresponds to the prism motor structure embodiment, and this embodiment can be implemented in conjunction with the prism motor structure embodiment. The relevant technical details mentioned in the prism motor structure embodiment remain valid in this embodiment, and will not be repeated here to avoid repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to the prism motor structure embodiment.

[0075] Furthermore, in order to highlight the innovative aspects of this application, no units that are not closely related to solving the technical problems proposed in this application are introduced in this embodiment, but this does not mean that there are no other units in this embodiment.

[0076] Another aspect of this application provides an electronic device, including: the prism motor structure as described in the above embodiment.

[0077] The above division of various components is only for clarity of description. In implementation, they can be merged into one component or some components can be split into multiple components. As long as they include the same logical relationship, they are all within the protection scope of this application.

[0078] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A prism motor structure, characterized in that, include: Base, prism, prism carrier, lens, first drive device, second drive device, third drive device; The base includes a base plate and a side wall surrounding the edge of the base plate; the base plate and the side wall form a groove; the prism carrier and the lens are arranged in the base along a first direction; The prism carrier has a second surface that is not perpendicular to the first surface of the base plate, the first surface being located within the groove, and the prism being disposed on the second surface; The prism carrier further extends with a first electrode plate; the base plate has a second electrode plate disposed opposite to the first electrode plate; the first electrode plate and the second electrode plate form a first capacitor; The first driving device, the second driving device, and the third driving device are disposed in the groove; the second driving device is used to drive the prism carrier to rotate about the second direction as an axis, and the first capacitance changes; the second direction is perpendicular to the first direction and parallel to the first surface. The first driving device is used to drive the lens to move along the first direction, and the third driving device is used to drive the prism carrier to rotate about a third direction as an axis; the third direction is perpendicular to the first direction and perpendicular to the second direction; The first driving device is provided with a first sensor, which is used to detect the rotation angle of the prism carrier with the first direction as the axis; and / or, the third driving device is provided with a second sensor, which is used to detect the rotation angle of the prism carrier with the third direction as the axis.

2. The prism motor structure according to claim 1, characterized in that, The first electrode plate is disposed opposite to the first surface, and the second electrode plate is embedded in the first surface of the base plate.

3. The prism motor structure according to claim 1, characterized in that, The sidewall includes a first sidewall perpendicular to the first direction; The first electrode plate is disposed opposite to the first sidewall, and the second electrode plate is embedded in the first sidewall.

4. The prism motor structure according to claim 1, characterized in that, The sidewall includes a first sidewall perpendicular to the first direction; the first driving device includes a first magnet and a first coil surrounding the first sensor, the first magnet is disposed on the prism carrier, the first magnet is disposed opposite to the first sidewall, and the first coil is built into the first sidewall.

5. The prism motor structure according to claim 4, characterized in that, The second driving device includes a second magnet and a second coil. The second magnet is disposed on the prism carrier and is disposed opposite to the first sidewall. The second coil is built into the first sidewall.

6. The prism motor structure according to any one of claims 1 to 5, characterized in that, The third driving device includes a third magnet and a third coil surrounding the second sensor. The third magnet is disposed on the prism carrier and is disposed opposite to the base plate. The third coil is built into the base plate.

7. The prism motor structure according to claim 1, characterized in that, The first electrode plate is a transmitting electrode plate, and the second electrode plate is a receiving electrode plate; there are two of both the first electrode plate and the second electrode plate.

8. The prism motor structure according to claim 4, characterized in that, The number of the first drive device is two, and / or the number of the third drive device is two.

9. A camera, characterized in that, include: The prism motor structure according to any one of claims 1-8.

10. An electronic device, characterized in that, include: The camera as described in claim 9.

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