Image acquisition method and image acquisition device

Abstract

The embodiment of the invention discloses an image acquisition method and an image acquisition device. The image sensor is applied to an image collector and comprises an image sensor, a piezoelectric plate and a transmission part, in electrode layers of the piezoelectric plate, at least one electrode layer is divided into at least two partition electrode layers which are symmetrical about the center of the piezoelectric plate and are not communicated with each other, and the piezoelectric plate intersects with the light inlet direction of the image sensor. The transmission part is located between the image sensor and the piezoelectric plate and attached to the image sensor and the piezoelectric plate. The method comprises the following steps: detecting jitter data when an image sensor performs image acquisition on a target, and determining motion data of a transmission part according to the jitter data; target voltages corresponding to the at least two partition electrode layers are determined according to the motion data, and the target voltages are applied to the at least two partition electrode layers; and controlling the image sensor to carry out image acquisition on the target. According to the scheme, the image sensor can be driven by the transmission part to perform three-dimensional motion so as to overcome shaking, and the image acquisition effect is improved.

Description

Technical Field

[0001] The present application relates to the field of image acquisition technology, and in particular to an image acquisition method and an image acquirer. Background Art

[0002] With the development of image acquisition technology, in modern society, image collectors have become an important tool for people to record life and capture beautiful moments. However, due to the influence of factors such as jitter during the shooting process, the image collectors are affected, resulting in blurred photos, which affects the shooting effect.

[0003] Among the current anti-shake solutions, optical anti-shake technology requires the use of large-sized lens components, which increases the size and weight of the camera. Mechanical anti-shake technology requires the use of complex mechanical structures, resulting in high costs. Electronic anti-shake technology cannot effectively suppress low-frequency jitters. Summary of the invention

[0004] The embodiments of the present application provide an image acquisition method and an image acquisition device, so as to effectively realize three-dimensional anti-shake without increasing the volume, weight and thickness of the image acquisition device.

[0005] According to one aspect of the present application, an image acquisition method is provided, which is applied to an image acquisition device, wherein the image acquisition device includes an image sensor, a piezoelectric sheet, and a transmission component, wherein at least one electrode layer of the piezoelectric sheet is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other, the piezoelectric sheet intersects with the light incident direction of the image sensor, and the transmission component is located between the image sensor and the piezoelectric sheet, and is bonded to the image sensor and the piezoelectric sheet; the method includes:

[0006] Detecting jitter data of the image sensor when capturing an image of a target, and determining motion data of the transmission component based on the jitter data;

[0007] Determine, according to the motion data, a target voltage corresponding to at least two partitioned electrode layers, and apply the target voltage to the at least two partitioned electrode layers;

[0008] The image sensor is controlled to capture an image of the target.

[0009] According to another aspect of the present application, an image collector is provided, the image collector comprising:

[0010] Image sensors, piezoelectric sheets, and transmission components;

[0011] Among the electrode layers of the piezoelectric sheet, at least one electrode layer is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other. The piezoelectric sheet intersects with the light input direction of the image sensor. The transmission component is located between the image sensor and the piezoelectric sheet, and is in contact with the image sensor and the piezoelectric sheet.

[0012] The technical solution of the embodiment of the present application is applied to an image collector, which includes an image sensor, a piezoelectric sheet and a transmission component. Among the electrode layers of the piezoelectric sheet, at least one electrode layer is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other. The piezoelectric sheet intersects with the light input direction of the image sensor. The transmission component is located between the image sensor and the piezoelectric sheet and is in contact with the image sensor and the piezoelectric sheet. The method includes: detecting jitter data of the image sensor when acquiring an image of a target, and determining motion data of the transmission component based on the jitter data; determining target voltages corresponding to at least two partitioned electrode layers based on the motion data, and applying the target voltages to at least two partitioned electrode layers; and controlling the image sensor to acquire an image of the target. The above scheme can adaptively determine the target voltage that needs to be applied to at least two partitioned electrode layers of the piezoelectric sheet according to the jitter data of the image collector, and apply the target voltage to at least two partitioned electrode layers to deform the piezoelectric material and drive the image sensor to move in three dimensions to eliminate jitter. Only piezoelectric sheets and transmission components are added, and anti-shake is effectively achieved without increasing the volume, weight and thickness of the image collector.

[0013] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 is a flow chart of an image acquisition method provided according to Embodiment 1 of the present application;

[0016] Figure 2 is a structural diagram of a piezoelectric sheet provided according to Embodiment 1 of the present application;

[0017] Figure 3This is a first schematic diagram of electrode layer partitioning provided according to Embodiment 1 of the present application;

[0018] Figure 4 is a structural diagram of an image collector provided according to Embodiment 1 of the present application;

[0019] Figure 5 is a flow chart of an image acquisition method provided according to Embodiment 1 of the present application;

[0020] Figure 6 This is a second schematic diagram of electrode layer partitioning provided in Embodiment 2 of the present application;

[0021] Figure 7 is a first deformation schematic diagram provided according to the second embodiment of the present application;

[0022] Figure 8 is a second deformation schematic diagram provided according to the second embodiment of the present application;

[0023] Fig. 9 This is a third schematic diagram of electrode layer partitioning provided in Embodiment 2 of the present application;

[0024] Fig.10 This is a fourth schematic diagram of electrode layer partitioning provided according to the third embodiment of the present application;

[0025] Fig.11 This is a fifth schematic diagram of electrode layer partitioning provided according to the third embodiment of the present application;

[0026] Fig.12 This is a sixth schematic diagram of electrode layer partitioning provided in Embodiment 3 of the present application;

[0027] Fig.13 This is the seventh schematic diagram of electrode layer partitioning provided in Embodiment 3 of the present application;

[0028] Fig.14 This is an eighth schematic diagram of electrode layer partitioning provided in Embodiment 3 of the present application;

[0029] Fig.15 It is a schematic diagram of the structure of the piezoelectric sheet and the transmission component provided in the third embodiment of the present application;

[0030] Fig.16 This is a complete structural diagram of the image acquisition device provided in Example 3 of the present application. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", "third", "fourth", "actual", "preset", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment 1

[0034] Figure 1 A flowchart of an image acquisition method provided in Embodiment 1 of the present application, the embodiment of the present application can be applied to the situation of eliminating the jitter generated by the image acquisition device. The method can be executed by an image acquisition device, the image acquisition device can be implemented in the form of hardware and / or software, and the image acquisition device can be configured in an image acquisition device. The image acquisition device includes an image sensor, a piezoelectric sheet, and a transmission component. Among the electrode layers of the piezoelectric sheet, at least one electrode layer is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other. The piezoelectric sheet intersects with the light input direction of the image sensor. The transmission component is located between the image sensor and the piezoelectric sheet, and is in contact with the image sensor and the piezoelectric sheet.

[0035] For example, the cross-sectional structure of the piezoelectric sheet is as follows: Figure 2As shown, it includes two electrode layers and a piezoelectric material layer sandwiched between the two electrode layers. The material of the two electrode layers is metal, which can be the same metal, such as copper, or different metals, such as one electrode layer is a silver layer and the other electrode layer is a copper layer. The selection of metal materials can be determined according to actual conditions and is not limited here. The piezoelectric material of the piezoelectric material layer is a material that will produce a voltage between the two end surfaces when subjected to pressure, and has an inverse piezoelectric effect, that is, the piezoelectric material will deform when a voltage is applied. The piezoelectric material can be a crystalline piezoelectric material, a ceramic piezoelectric material, a polymer piezoelectric material, a single crystal piezoelectric material, a composite piezoelectric material, etc., which is not limited here.

[0036] At least one of the two electrode layers of the piezoelectric sheet is divided into at least two partitioned electrode layers, and can be divided into two partitioned electrode layers, such as Figure 3 The structure between the image sensor, transmission components and piezoelectric film is shown in Figure 4 As shown, the piezoelectric sheet intersects with the incoming light direction of the image sensor. In the embodiment of the present application, the plane of the piezoelectric sheet is initially perpendicular to the incoming light direction, that is, the incident light is perpendicular to the plane of the piezoelectric sheet. If the piezoelectric sheet is deformed, the incident light and the piezoelectric sheet will intersect and not be perpendicular. Figure 3 At least two partitioned electrode layers obtained by segmentation in the piezoelectric sheet can be applied with a positive voltage or a negative voltage, and the other electrode layer is applied with a 0V voltage, so that the piezoelectric material layer of the piezoelectric sheet produces different deformations, thereby driving the transmission component to move, and the transmission component drives the image sensor to move.

[0037] like Figure 1 As shown, the method includes:

[0038] S110, detecting jitter data of the image sensor when capturing an image of a target, and determining motion data of the transmission component according to the jitter data.

[0039] Exemplarily, a judgment principle indicating whether the image sensor is shaking can be set. For example, when the image sensor remains motionless and the duration exceeds a preset time, it is assumed that the image sensor is capturing an image of the target. The field of view angle of the image sensor at this time is the reference. Based on this field of view angle, the shaking data of the image sensor is detected. In addition, the image sensor can also be used to capture an image of the target. If the target is within the range of the captured image or at the center of the captured image, it is determined that the image sensor is capturing an image of the target. The field of view angle of the image sensor at this time is the reference. Based on this field of view angle, the shaking data of the image sensor is detected. The shaking data is the relevant data when the image sensor shakes when capturing an image of the target. It can be detected by an angular motion detection device. The angular motion detection device can be configured in the image collector, or can be relatively fixedly bound to the image collector outside the image collector. The angular motion detection device can be, for example, a gyroscope.

[0040] The motion data of the transmission component is the data for overcoming the jitter. Since the image sensor fits closely with the transmission component, it is assumed that the motion of the transmission component can be directly transmitted to the image sensor, and the image sensor follows the motion of the transmission component. For example, assuming that the image sensor jitters downward on the field of view angle reference for capturing images of the target, in order to overcome the jitter, the transmission component needs to drive the image sensor to move upward so that the image sensor continues to capture images of the target at the original field of view angle. If it is detected that there is jitter data when the image sensor captures images of the target, the motion data of the transmission component is determined based on the jitter data, reflecting what kind of movement the transmission component needs to drive the image collector to perform in order to overcome the jitter.

[0041] S120. Determine target voltages corresponding to at least two partitioned electrode layers according to the motion data, and apply the target voltages to the at least two partitioned electrode layers.

[0042] Exemplarily, the movement of the transmission component is caused by the deformation of the piezoelectric material in the piezoelectric sheet, and the deformation of the piezoelectric material is caused by the voltage applied in at least two partitioned electrode layers. After determining the motion data that the transmission component needs to move, it can be determined how much target voltage needs to be applied to the at least two partitioned electrode layers in order to deform the piezoelectric material of the piezoelectric sheet and drive the transmission component to move in accordance with the motion data. The polarity and amplitude of the target voltage corresponding to the at least two partitioned electrode layers can be the same or different, and are specifically determined according to the motion data, that is, according to the direction and distance that the transmission component needs to move.

[0043] After determining the target voltage corresponding to at least two partitioned electrode layers, the target voltage is applied to the at least two partitioned electrode layers, so that the piezoelectric material corresponding to the partitioned electrode layer is deformed, and the piezoelectric material of the entire piezoelectric sheet is comprehensively deformed to drive the transmission component to move.

[0044] S130: Control the image sensor to capture an image of the target.

[0045] After applying the target voltage to at least two partitioned electrode layers, the piezoelectric material of the piezoelectric sheet is deformed, pushing the transmission component in contact with the piezoelectric sheet to move, and the transmission component drives the image sensor to move to overcome the jitter, so that the image sensor continues to capture the image of the target according to the original field of view angle. In this case, the image sensor can be controlled to continue to capture the image of the target, so that a clear, complete and positive target image can be captured.

[0046] The technical solution of the embodiment of the present application is applied to an image collector, which includes an image sensor, a piezoelectric sheet and a transmission component. Among the electrode layers of the piezoelectric sheet, at least one electrode layer is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other. The piezoelectric sheet intersects with the light input direction of the image sensor. The transmission component is located between the image sensor and the piezoelectric sheet and is in contact with the image sensor and the piezoelectric sheet. The method includes: detecting jitter data of the image sensor when acquiring an image of a target, and determining motion data of the transmission component based on the jitter data; determining target voltages corresponding to at least two partitioned electrode layers based on the motion data, and applying the target voltages to at least two partitioned electrode layers; and controlling the image sensor to acquire an image of the target. The above scheme can adaptively determine the target voltage that needs to be applied to at least two partitioned electrode layers of the piezoelectric sheet according to the jitter data of the image collector, and apply the target voltage to at least two partitioned electrode layers to deform the piezoelectric material and drive the image sensor to move in three dimensions to eliminate jitter. Only piezoelectric sheets and transmission components are added, and anti-shake is effectively achieved without increasing the volume, weight and thickness of the image collector.

[0047] Embodiment 2

[0048] Figure 5 This is a flow chart of an image acquisition method provided in the second embodiment of the present application. The present embodiment is optimized based on the above embodiment. For solutions not described in detail in the present embodiment, please refer to the above embodiment. Figure 5 As shown, the method of the embodiment of the present application specifically includes the following steps:

[0049] S210. Detecting jitter data of the image sensor when acquiring images of a target by means of an angular motion detection device carried by the image collector; wherein the jitter data includes a vector jitter direction and a jitter distance.

[0050] Among them, the angular motion detection device can be configured in the image collector, or it can be fixedly bound to the outside of the image collector relatively to the image collector. The angular motion detection device can be a gyroscope. The gyroscope is usually composed of one or more rotating gyroscopes. The gyroscope contains a rotor or rotating mass inside. When the object rotates, due to the conservation of angular momentum, the gyroscope will generate a force perpendicular to the direction of rotation. This is the gyro effect. The gyroscope senses the angular velocity of the object's rotation by measuring the precession angular velocity of the gyroscope. The measurement of precession angular velocity can be achieved through different technologies, such as optical gyroscopes, mechanical gyroscopes, and micro-electromechanical gyroscopes.

[0051] In order to simplify the calculation model, the angular velocity data output by the gyroscope can be converted into a rotation vector to represent the rotation direction and angle of the image collector. Assume that the angular velocity output by the gyroscope is (ωx, ωy, ωz), where ωx, ωy, and ωz represent the angular velocity of the image collector rotating around the X-axis, Y-axis, and Z-axis in the coordinate system with the center of the image collector as the origin. The calculation formula for the rotation vector is as follows:

[0052]

[0053] Among them, β represents the rotation angle, and n represents the unit vector of the rotation axis. According to the output of the gyroscope, the rotation vector r can be obtained. The rotation vector is converted into Euler angles (Yaw angle, Pitch angle, and Roll angle). According to the Euler angle differential equation, the attitude solution based on the quaternion method and the calculation of the full attitude matrix, the vector jitter direction and jitter distance of the image collector are obtained.

[0054] S220: Taking the opposite direction of the vector shaking direction as the vector movement direction of the transmission component, taking the shaking distance as the movement distance of the transmission component, and obtaining movement data of the transmission component.

[0055] Exemplarily, the vector jitter direction represents the current jitter direction of the image sensor. If the image sensor is to continue to capture images of the target at the original field of view angle, it is necessary to overcome the jitter and make the image sensor move in the opposite direction of the vector jitter direction, that is, the transmission component is required to drive the image sensor to move in the opposite direction of the vector jitter direction, so the opposite direction of the vector jitter direction is used as the vector movement direction of the transmission component. Similarly, the jitter distance is the jitter distance of the image sensor. If the image sensor is to continue to capture images of the target at the original field of view angle, it is necessary to overcome the jitter and make the image sensor move in the opposite direction to the jitter distance, that is, the transmission component is required to drive the image sensor to move in the opposite direction to the jitter distance before it can return to its original position, so the jitter distance is used as the movement distance of the transmission component.

[0056] S230, according to the movement data of the partial components on the transmission component that are in contact with the at least two partitioned electrode layers, respectively determine the deformation amount required for the piezoelectric materials corresponding to the at least two partitioned electrode layers to drive the partial components to move.

[0057] Exemplarily, the transmission component is in contact with at least two partitioned electrode layers, and the piezoelectric sheets corresponding to different partitioned electrode layers push different positions of the transmission component to move. It is possible to determine which part of the component is in contact with the at least two partitioned electrode layers, and further determine the motion data of the part of the component. According to the motion data of the part of the component, it is determined that when the piezoelectric sheet part in contact with the part of the component drives the part of the component to move, the required deformation amount of the piezoelectric material. Figure 3 The left partition in the transmission component is used to determine the motion data of some parts that are in contact with the left partition. According to the motion data, the required deformation amount of the piezoelectric material when the piezoelectric sheet in the left partition drives some parts to move is determined, and then the target voltage to be applied to the partition electrode layer of the left partition is determined.

[0058] S240: Determine a target voltage corresponding to the at least two partitioned electrode layers according to the required deformation amount of the piezoelectric material corresponding to the at least two partitioned electrode layers and the relationship between the deformation amount and the voltage of the piezoelectric material.

[0059] Exemplarily, the relationship between the voltage applied to the piezoelectric material and the amount of deformation generated can be determined in advance based on the characteristics of the piezoelectric material, and the target voltage required to be applied to the at least two partitioned electrode layers can be determined based on the deformation amounts required for each of the at least two partitioned electrode layers and the relationship between the applied voltage and the amount of deformation generated.

[0060] In an embodiment of the present application, determining target voltages corresponding to at least two partitioned electrode layers according to the motion data includes:

[0061] Determining the polarity of the target voltage corresponding to at least two partitioned electrode layers according to the vector motion direction of the transmission component;

[0062] According to the movement distance of the transmission component, the amplitude of the target voltage corresponding to at least two partitioned electrode layers is determined.

[0063] Exemplarily, the partitioned electrode layers apply voltages of different polarities, the piezoelectric material has different deformations, and the piezoelectric sheet protrudes in different directions. Therefore, the target voltages of corresponding polarities applied to each partitioned electrode layer can be determined according to the vector motion direction of the transmission component to make the transmission component move along the vector motion direction. The partitioned electrode layers apply voltages of different amplitudes, the piezoelectric material has different deformations, and the piezoelectric sheet protrudes to different degrees. Therefore, the amplitudes of the target voltages to be applied to each partitioned electrode layer can be determined according to the motion distance of the transmission component to make the transmission component move along the vector motion direction to meet the motion distance.

[0064] In the embodiment of the present application, Figure 6 Take the structure in as an example to explain the process of determining the vector movement direction, movement distance and target voltage. Figure 6 In the piezoelectric sheet, one electrode layer is divided into four partitioned electrode layers, and the other electrode layer is not divided. A 0V voltage is applied to the other electrode layer. If a positive voltage is applied to the second and fourth regions of the partitioned electrode layer, the piezoelectric material produces an inverse piezoelectric effect, and the piezoelectric sheet will move along Figure 3 The piezoelectric sheet bulges inward perpendicularly, and the transmission component is pushed inward. The side view is shown in Figure 7 If a forward voltage is applied to the four regions in the partitioned electrode layer and a reverse voltage is applied to the two regions, the piezoelectric sheets in the four regions bulge inwards perpendicular to the piezoelectric sheets, and the piezoelectric sheets in the two regions bulge outwards perpendicular to the piezoelectric sheets. The side view is shown in Figure 8 As shown. For the four-zone piezoelectric film, assume that the voltage applied to the four-zone zone electrode layer is V, the sector radius of the four-zone zone electrode layer is R, the arc length is L, and the sector center angle is The thickness of the piezoelectric film is d. Since the arc length of the fan-shaped area is a curve, it can be approximated as a combination of several arc segments, and the deformation of each arc segment is The deformation corresponding to the entire arc length is the integration of several arc segments Because the central angle of the sector is The deformation of the entire arc length is Deformation in the direction of the sector radius Assuming that the thickness of the piezoelectric material is d1 and the thickness of the electrode layer is d2, the radius of the bending arc of the piezoelectric film on the bent cross section is The center of the piezoelectric sheet and the center of the transmission component are approximately the same point. In the triangle formed by the center of the curved arc on the cross section, the tangent point between the transmission component and the piezoelectric sheet, and the center of the piezoelectric sheet, Among them, l is Figure 8 The distance h that the transmission component is pushed is obtained by solving α, and the vector motion direction and motion distance of the transmission component under the action of voltage V are determined by combining the distance h that the transmission component is pushed calculated for each partition electrode layer. The motion data of the transmission component is determined based on the jitter data, that is, the vector motion direction and motion distance of the transmission component are determined, and the target voltage V that needs to be applied can be obtained by reverse deduction.

[0065] S250 , applying the target voltage to at least two partitioned electrode layers.

[0066] S260: Control the image sensor to capture an image of the target.

[0067] The embodiment of the present application provides an image acquisition method, wherein the image sensor detects the jitter data when acquiring an image of a target through an angular motion detection device carried by the image acquisition device; wherein the jitter data includes a vector jitter direction and a jitter distance; the reverse direction of the vector jitter direction is used as the vector motion direction of the transmission component, and the jitter distance is used as the motion distance of the transmission component to obtain the motion data of the transmission component. According to the motion data of the partial components on the transmission component that are in contact with at least two partitioned electrode layers, the deformation amount required for the piezoelectric materials corresponding to at least two partitioned electrode layers to drive the partial components to move is determined respectively; according to the deformation amount required for the piezoelectric materials corresponding to at least two partitioned electrode layers, and the relationship between the deformation amount of the piezoelectric materials and the voltage, the target voltage corresponding to at least two partitioned electrode layers is determined. The above scheme can accurately detect the jitter data through the angular motion detection device, and determine the motion data required for the transmission component to eliminate the jitter, and then determine the target voltage to be applied to the partitioned electrode layer. After the target voltage is applied, the deformation of the piezoelectric sheet is accurately transmitted to the image sensor via the transmission component, thereby effectively eliminating the jitter, and there is no need to add complex mechanical equipment, and the weight, volume and thickness of the image sensor are not increased too much.

[0068] In the embodiment of the present application, in order to increase the sensitivity of deformation caused by voltage, a multi-layer material stacking scheme can be adopted in the piezoelectric material layer to increase the deformation of the piezoelectric sheet when the same voltage is applied, thereby improving the jitter adjustment amplitude.

[0069] The partitioned electrode layer of the piezoelectric sheet may be further divided to divide each of the at least two partitioned electrode layers into at least two sub-electrode layers that are not conductive to each other;

[0070] Applying the target voltage to at least two partitioned electrode layers comprises:

[0071] For each partitioned electrode layer, determining a target sub-voltage corresponding to the at least two sub-electrode layers according to the voltage applied to the at least two sub-electrode layers and the deformation of the at least two sub-electrode layers, and the deformation required by the piezoelectric material corresponding to the partitioned electrode layer;

[0072] The target sub-voltages are applied to at least two sub-electrode layers respectively.

[0073] For example, Fig. 9 As shown, the partitioned electrode layer of each sector can be further divided into the innermost concentric sectors and concentric sector rings, and the target voltage is applied to each sector ring and sector respectively. The deformation amounts of multiple concentric sector rings and concentric sectors can be superimposed, thereby increasing the deformation amount under the same voltage.

[0074] Embodiment 3

[0075] Figure 4 This is a schematic diagram of the structure of an image collector provided in the third embodiment of the present application. The image collector also includes an image acquisition device inside or outside to implement the method in any of the above embodiments. Figure 4 As shown, the image collector includes:

[0076] An image sensor, a piezoelectric sheet and a transmission component, wherein at least one electrode layer of the piezoelectric sheet is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other, the piezoelectric sheet intersects with the light input direction of the image sensor, and the transmission component is located between the image sensor and the piezoelectric sheet, and is in contact with the image sensor and the piezoelectric sheet.

[0077] For example, the cross-sectional structure of the piezoelectric sheet is as follows: Figure 2 As shown, it includes two electrode layers and a piezoelectric material layer sandwiched between the two electrode layers. The material of the two electrode layers is metal, which can be the same metal, such as copper, or different metals, such as one electrode layer is a silver layer and the other electrode layer is a copper layer. The selection of metal materials can be determined according to actual conditions and is not limited here. The piezoelectric material of the piezoelectric material layer is a material that will produce a voltage between the two end surfaces when subjected to pressure, and has an inverse piezoelectric effect, that is, the piezoelectric material will deform when a voltage is applied. The piezoelectric material can be a crystalline piezoelectric material, a ceramic piezoelectric material, a polymer piezoelectric material, a single crystal piezoelectric material, a composite piezoelectric material, etc., which is not limited here.

[0078] At least one of the two electrode layers of the piezoelectric sheet is divided into at least two partitioned electrode layers, and can be divided into two partitioned electrode layers, such as Figure 3The structure between the image sensor, transmission components and piezoelectric film is shown in Figure 4 As shown, the piezoelectric sheet intersects with the light-incoming direction of the image sensor. Different voltages can be applied to at least two partitioned electrode layers obtained by segmentation in the piezoelectric sheet, so that the piezoelectric material layer of the piezoelectric sheet produces different deformations, thereby driving the transmission component to move, and the transmission component drives the image sensor to move. When there is jitter, the jitter data is detected, the motion data of the transmission component is determined according to the jitter data, the target voltage corresponding to at least two partitioned electrode layers is determined according to the motion data, and the target voltage is applied to at least two partitioned electrode layers, so that the piezoelectric material is deformed, the piezoelectric sheet is deformed, and the transmission component is pushed to move, and the transmission component transmits the motion to the image sensor to offset the jitter.

[0079] The shape of the piezoelectric piece is not limited and can be circular, such as Figure 3 It can also be a square, such as Fig.10 As shown, other shapes are also possible.

[0080] Among the electrode layers of the piezoelectric sheet, one electrode layer is divided into at least two partitioned electrode layers, such as Figure 3 As shown, one of the electrode layers of the piezoelectric sheet is divided into two partitioned electrode layers. Alternatively, both electrode layers of the piezoelectric sheet can be divided into at least two partitioned electrode layers. Alternatively, at least one electrode layer of the piezoelectric sheet can be divided into four partitioned electrode layers, such as Figure 6 As shown. At least one electrode layer of the piezoelectric sheet can also be divided into eight partitioned electrode layers, such as Fig.11 As shown, fine-grained adjustment is achieved. The number of partitioned electrode layers is not limited, and the main focus is on being able to finely drive the image sensor to move without causing excessive computational complexity.

[0081] In the embodiment of the present application, the number of the partitioned electrode layers is at least four, and the angles between two boundaries of the partitioned electrode layers passing through the center point of the piezoelectric sheet are equal.

[0082] like Figure 6 As shown in , the electrode layer is divided into four electrode layers, and the central angles of each divided electrode layer are equal. Fig.12 As shown, O is the center point of the piezoelectric sheet, and the boundaries passing the center point of the piezoelectric sheet are l1 and l2, and the boundary not passing the center point of the piezoelectric sheet is l3. The angles between the two boundaries passing the center point of the piezoelectric sheet are α1, α2, α3, and α4, respectively. By making α1, α2, α3, and α4 equal, equal adjustments can be made in the same dimension, for example, the amplitude of the movement of the transmission component driven by the piezoelectric sheet on the left and right sides in the horizontal direction is the same under equal voltage.

[0083] In an embodiment of the present application, each of the at least two partitioned electrode layers includes at least two sub-electrode layers that are not conductive to each other.

[0084] For example, Fig. 9 As shown in FIG. 1 , in order to increase the deformation under the same voltage, the partitioned electrode layer can be further divided, and the partitioned electrode layer can be divided by concentric dividing lines to obtain sub-electrode layers, so that the deformation between the sub-electrode layers can be accumulated to obtain a larger deformation. The sub-electrode layers obtained by dividing the partitioned electrode layer can also be as follows Fig.13 and Fig.14 The above solution increases the deformation of the piezoelectric sheet under unit voltage without increasing the number of piezoelectric material layers or introducing complex circuits.

[0085] In the embodiment of the application itself, the first boundaries of the at least two sub-electrode layers are similar to the figures enclosed by the second boundaries of the partitioned electrode layer; wherein the first boundary is a boundary that does not pass through the center point of the piezoelectric piece; and the second boundary is a boundary that passes through the center point of the piezoelectric piece.

[0086] For example, Fig. 9 As shown, the dividing line of the partitioned electrode layer, that is, the first boundary, is similar to the figure enclosed by the second boundary of the electrode layer, that is, a concentric sector. This scheme can facilitate the calculation of the relationship between the voltage and the deformation amount, so as to quickly determine the target voltage corresponding to each sub-electrode layer.

[0087] In the embodiment of the present application, the transmission component is a columnar non-conductive structure, and the center of the transmission component coincides with the center of the piezoelectric sheet.

[0088] For example, the transmission component can be a columnar structure such as a cylinder, a cuboid, or a cube. The transmission component is made of non-conductive material to avoid contact with the electrode layer and conduction, thereby preventing interference with the voltage of the electrode layer. The center of the transmission component coincides with the center of the piezoelectric sheet. For example, in the top view, Fig.15 As shown, the transmission component forms a symmetrical structure with the center point of the piezoelectric sheet. When the piezoelectric sheet drives the transmission component to move, the maximum movement amplitudes of the parts located on both sides of the center point in the same direction are equal, and symmetrical movement can be achieved.

[0089] In the embodiment of the present application, other conventional components included in the image collector are not explicitly described and can be determined according to actual conditions, such as Fig.16 As shown, a lens group and a dust-proof lens may also be included.

[0090] The embodiment of the present application provides an image collector, which includes: an image sensor, a piezoelectric sheet, and a transmission component; among the electrode layers of the piezoelectric sheet, at least one electrode layer is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other, the piezoelectric sheet intersects with the light-incoming direction of the image sensor, and the transmission component is located between the image sensor and the piezoelectric sheet, and fits the image sensor and the piezoelectric sheet. The above-mentioned image collector can cause the piezoelectric sheet to deform when voltage is applied to at least two electrode layers, and then drive the image sensor to move through the transmission component, effectively eliminating jitter, and the piezoelectric sheet has a simple structure, small volume and small thickness, and the transmission structure has a simple structure, is made of non-metallic materials, and has a small mass, which effectively achieves jitter elimination without adding too much weight, volume and thickness to the image collector.

[0091] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. An image acquisition method, characterized in that: The invention is applied to an image collector, the image collector comprises an image sensor, a piezoelectric sheet and a transmission component, at least one of the electrode layers of the piezoelectric sheet is divided into at least two partitioned electrode layers which are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other, the piezoelectric sheet intersects with the light incident direction of the image sensor, the transmission component is located between the image sensor and the piezoelectric sheet, and is bonded to the image sensor and the piezoelectric sheet; the method comprises: Detecting jitter data of the image sensor when capturing an image of a target, and determining motion data of the transmission component based on the jitter data; Determine, according to the motion data, a target voltage corresponding to at least two partitioned electrode layers, and apply the target voltage to the at least two partitioned electrode layers; The image sensor is controlled to capture an image of the target.

2. The method according to claim 1, characterized in that Detecting jitter data of an image sensor when capturing an image of a target, and determining motion data of the transmission component according to the jitter data, including: Detecting jitter data of the image sensor when acquiring an image of a target by using an angular motion detection device carried by the image collector; wherein the jitter data includes a vector jitter direction and a jitter distance; The opposite direction of the vector shaking direction is used as the vector movement direction of the transmission component, and the shaking distance is used as the movement distance of the transmission component to obtain the movement data of the transmission component.

3. The method according to claim 2, characterized in that Determining target voltages corresponding to at least two partitioned electrode layers according to the motion data includes: Determining the polarity of the target voltage corresponding to at least two partitioned electrode layers according to the vector motion direction of the transmission component; According to the movement distance of the transmission component, the amplitude of the target voltage corresponding to at least two partitioned electrode layers is determined.

4. The method according to claim 1, characterized in that: Determining target voltages corresponding to at least two partitioned electrode layers according to the motion data includes: According to the motion data of the partial components on the transmission component that are in contact with the at least two partitioned electrode layers, respectively determining the deformation amount required for the piezoelectric materials corresponding to the at least two partitioned electrode layers to drive the partial components to move; The target voltage corresponding to the at least two partitioned electrode layers is determined according to the required deformation amount of the piezoelectric material corresponding to the at least two partitioned electrode layers and the relationship between the deformation amount and the voltage of the piezoelectric material.

5. The method according to claim 4, characterized in that Each of the at least two partitioned electrode layers comprises at least two sub-electrode layers that are not conductive to each other; Applying the target voltage to at least two partitioned electrode layers comprises: For each partitioned electrode layer, determining a target sub-voltage corresponding to the at least two sub-electrode layers according to the voltage applied to the at least two sub-electrode layers and the deformation of the at least two sub-electrode layers, and the deformation required by the piezoelectric material corresponding to the partitioned electrode layer; The target sub-voltages are applied to at least two sub-electrode layers respectively.

6. An image collector, characterized in that: The image collector comprises: Image sensors, piezoelectric sheets, and transmission components; Among the electrode layers of the piezoelectric sheet, at least one electrode layer is divided into at least two partitioned electrode layers that are symmetrical based on the center of the piezoelectric sheet and are not conductive to each other. The piezoelectric sheet intersects with the light input direction of the image sensor. The transmission component is located between the image sensor and the piezoelectric sheet, and is in contact with the image sensor and the piezoelectric sheet.

7. The image collector according to claim 6, characterized in that: The number of the partitioned electrode layers is at least four, and the angles between two boundaries of the partitioned electrode layers passing through the center point of the piezoelectric sheet are equal.

8. The image collector according to claim 6, characterized in that: Each of the at least two partitioned electrode layers includes at least two sub-electrode layers that are not conductive to each other.

9. The image collector according to claim 8, characterized in that: The first boundaries of the at least two sub-electrode layers and the second boundaries of the partitioned electrode layer are similar in shape; wherein the first boundary is a boundary that does not pass through the center point of the piezoelectric sheet; and the second boundary is a boundary that passes through the center point of the piezoelectric sheet.

10. The image collector according to claim 6, characterized in that: The transmission component is a columnar non-conductive structure, and the center of the transmission component coincides with the center of the piezoelectric sheet.

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