Imaging module, imaging method and electronic device
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2023-08-17
- Publication Date
- 2026-05-06
AI Technical Summary
Existing electronic device cameras face complexity in changing the gap between moving optical elements, which is essential for achieving high performance similar to conventional cameras.
An imaging module with a simple structure that includes a first and second moving unit, a base, and a connection unit, allowing a first ball to be sandwiched between unparallel contact surfaces, enabling flexible change in the gap between the moving units through a groove on the base.
The solution allows for efficient and flexible adjustment of the gap between optical elements, simplifying the structure while maintaining high performance, thus addressing the complexity issue in existing camera designs.
Smart Images

Figure CN2023113596_20022025_PF_FP_ABST
Abstract
Description
IMAGING MODULE, IMAGING METHOD AND ELECTRONIC DEVICETECHNICAL FIELD
[0001] Embodiments of the present application relate to the field of electronic technologies, and more specifically, to an imaging module, imaging method and electronic device.BACKGROUND
[0002] With the development of electronic devices, a photographing function continues to be optimized to give a camera of an electronic device similar performance to conventional cameras. A structure where at least two groups in the camera move at the same time with changing their gap is well-known to realize high performance. However, the structure for the camera of the electronic device to change the gap between the two groups is usually complex.SUMMARY
[0003] Embodiments of this application provide an imaging module, imaging method and electronic device, which allow a gap between two groups to be changed flexibly with a simple structure.
[0004] According to a first aspect, an embodiment of this application provides an imaging module, which includes: a first moving unit configured to support a first optical element; a second moving unit configured to support a second optical element with the same optical axis as the first optical element; a base configured to support the first moving unit and the second moving unit to be movable in a first direction, where the first direction is a direction of the optical axis; and a connection unit fixed to the first moving unit and the second moving unit and configure to enable a first ball to be sandwiched between a first contact surface of the first moving unit and a second contact surface of the second moving unit, where the first contact surface faces the second contact surface along the first direction, and the first contact surface is unparallel to the second contact surface; where the base includes a first groove to accommodate the first ball, the position of the first ball between the first contact surface and the second contact surface changing while the first ball moves along the first groove , enabling a distance between the first moving unit and the second moving unit to be changed.
[0005] According to the above-mentioned technical solution, the first ball gets in touch with the first contact surface and the second contact surface by a force provided by the connection unit. As the first contact surface and the second contact surface is unparallel to each other, when the position of the first ball changes, the first moving unit and the second moving unit are either pulled close by the force or separated away by the ball to always sandwich the first ball, resulting in a change of distance between the first moving unit and the second moving unit.
[0006] In one optional implementation, an angle between an extension direction of the first groove and the first direction is an acute angle, a first contact line being unparallel to a second contact line, where the first contact line is made up of a succession of contact points of the first ball and the first contact surface and the second contact line is made up of a succession of contact points of the first ball and the second contact surface.
[0007] According to the above-mentioned technical solution, the angle between an extension direction of the first groove and the first direction is greater than 0° and smaller than 90°. The movement along the first groove can thus be decomposed into displacement along the optical axis and displacement perpendicular to the optical axis. The displacement along the optical axis makes the first ball move together with the two moving units, and the displacement perpendicular to the optical axis results in the position change of the first ball between the first contact surface and the second contact surface. The first ball moves in a second direction (aY axis) between the first contact surface and the second contact surface. The first contact line is unparallel to the second contact line, which means that the distance between the first moving unit and the second moving unit in the optical axis direction changes along the second direction, and then the distance between the first moving unit and the second moving unit changes as the first ball moves along the first groove.
[0008] In one optional implementation, an extension direction of the first groove is parallel to the first direction, and a depth of the first groove changes along the first groove , a first contact line being unparallel to a second line, where the first contact line is made up of a succession of contact points of the first ball and the first contact surface, and the second contact line is made up of a succession of contact points of the first ball and the second contact surface.
[0009] According to the above-mentioned technical solution, as the depth of the first groove changes along the first groove, the first ball moves up and down (along a Z axis) between the first contact surface and the second contact surface. The first contact line is unparallel to the second contact line, which means that the distance between the first moving unit and the second moving unit in the optical axis direction changes along the third direction (the Z axis) , and then the distance between the first moving unit and the second moving unit changes as the first ball moves along the first groove.
[0010] In one optional implementation, an angle between the first contact surface and a first reference plane is an acute angle, and / or, an angle between the second contact surface and a first reference plane is an acute angle, where the first reference plane is perpendicular to a groove depth direction.
[0011] According to the above-mentioned technical solution, the first contact surface and / or the second contact surface faces the first groove or the base direction slightly, providing the first ball with a force that has a component towards the first groove, which will preload the first ball into the first groove. Then the first ball can move with less rattling. When only one of the first contact surface and the second contact surface faces down, and the other one can be set to be perpendicular to the first reference plane.
[0012] In one optional implementation, the first contact surface and / or the second contact surface is a flat plane.
[0013] According to the above-mentioned technical solution, when the contact surface is flat, the first ball can move more smoothly with less vibration.
[0014] Also, the first contact surface and / or the second contact surface can be smooth surfaces, which can be curved surfaces or flat planes. The first ball moves between the smooth surfaces smoothly and steadily.
[0015] In one optional implementation, the first contact surface and / or the second contact surface includes at least two parts not in a plane.
[0016] According to the above-mentioned technical solution, by employing different properties of different parts, the movement of the first ball between the first contact surface and the second contact surface can be divided into several periods according to each part, and the distance between the two moving units can also be set accordingly.
[0017] In one optional implementation, the at least two parts include a part that is a curved surface.
[0018] According to the above-mentioned technical solution, part of the flat plane can be combined with part of the curved surface to provide a desirable changing rule of the gap (distance) between the first moving unit and the second moving unit.
[0019] In one optional implementation, the first groove is a straight.
[0020] In one optional implementation, the first groove is a curved.
[0021] The shape of the first groove can be designed together with the shapes of the first contact surface and the second contact surface to change the gap more flexibly.
[0022] In one optional implementation, the connection unit includes a first magnetic piece and a second magnetic piece (252) , where the first magnetic piece is fixed to the first moving unit and the second magnetic piece is fixed to the second moving unit, an attraction force between the first magnetic piece and the second magnetic piece enabling the first ball to be sandwiched between the first contact surface and the second contact surface.
[0023] In one optional implementation, the connection unit includes an elastic component, where two ends of the elastic component are fixed to the first moving unit and the second moving unit respectively, a tensile force of the elastic component enabling the first ball to be sandwiched between the first contact surface and the second contact surface.
[0024] According to the above-mentioned technical solution, the force provided by the connection unit can be a non-contact force, such as an attraction force, or a contact force, such as tensile force, and accordingly the connection unit can be magnetic pieces or an elastic component, such as a spring. Thus, the first ball always gets in touch with the first contact surface and the second contact surface because of the action of the force produced by the connection unit.
[0025] In one optional implementation, the base includes two shafts disposed at two sides of the optical axis respectively, the two shafts extending along the first direction; and the first moving unit and the second moving unit including two sliding grooves respectively to match the two shafts and sliding along the two shafts.
[0026] The number of shafts can be set flexibly. Also, the first moving unit and the second moving unit can move along the first direction by any sliding structure.
[0027] In one optional implementation, the two shafts include a first shaft and a second shaft, the first contact surface, the second contact surface , the connection unit , the first groove and the first ball being set near the first shaft; a first fixing position where the connection unit is fixed to the first moving unit is closer to the first shaft than a second fixing position where the connection unit is fixed to the second moving unit; and the first moving unit including a third magnetic piece and the first shaft is made of magnetic material, forming an attraction force between the third magnetic piece and the first shaft.
[0028] According to the above-mentioned technical solution, the connection unit not only provides a force that tends to pull the two moving units closer but also preloads one of the two moving units to the shaft (or the base) . Combined with the third magnetic piece that preloads the other of the two moving units to the shaft, the first moving unit and the second moving unit are preloaded to each other and both preloaded to the shaft.
[0029] In one optional implementation, the base includes a second groove, the first moving unit includes a third surface and the second moving unit includes a fourth surface; a second ball is disposed between the third surface and the fourth surface without touching the third surface and the fourth surface; the second groove and the first groove are symmetric about a second reference plane, where the second reference plane is perpendicular to a first reference plane, the optical axis is in the second reference plane, and the first reference plane is perpendicular to a groove depth direction; and when the base supports the first moving unit and the second moving unit to move in the first direction, the second ball moves along the second groove.
[0030] According to the above-mentioned technical solution, the structure near the first shaft is used to adjust the gap between the first moving unit and the second moving unit, and the structure near the second shaft is used to fill the gap of that side without changing the gap between the two moving units. When the imaging module falls or suffers from large vibration, the structure near the second shaft will improve the reliability of the imaging module provided in this embodiment.
[0031] In one optional implementation, the first moving unit is a lens supporter and the second moving unit is a lens supporter.
[0032] In one optional implementation, the first moving unit is a lens supporter and the second moving unit is a mask.
[0033] According to a second aspect, an embodiment of this application provides an imaging method applied to an imaging module, the imaging module comprising: a first moving unit configured to support a first optical element; a second moving unit configured to support a second optical element with the same optical axis as the first optical element; a base configured to support the first moving unit and the second moving unit to be movable in a first direction, wherein the first direction is a direction of the optical axis; and a connection unit fixed to the first moving unit and the second moving unit and configured to enable a first ball to be sandwiched between a first contact surface of the first moving unit and a second contact surface of the second moving unit, wherein the first contact surface faces the second contact surface along the first direction, and the first contact surface is unparallel to the second contact surface; wherein the base comprises a first groove to accommodate the first ball, a position of the first ball between the first contact surface and the second contact surface changing while the first ball moves along the first groove; the imaging method comprising: receiving a first user input; driving the first moving unit or the second moving unit to move in a fourth direction or a fifth direction in response to the first user input, wherein the fourth direction and the fifth direction are opposite directions of the direction of the optical axis.
[0034] The first user input may be applied by user to change settings or focus and in response to the user input, the distance between the first moving unit and the second moving unit needs to be adjusted. Then a driving unit may drive the first moving unit or the second moving unit to move in the fourth direction or the fifth direction to change the distance between the first moving unit and the second moving unit. It is to be noted that although only one of the first moving unit and the second moving unit is driven by the driving unit, both of them move in the fourth direction or the fifth direction under the action of the connection unit.
[0035] In one optional implementation, the method further comprises: determine a target distance between the first moving unit and the second moving unit based on the first user input; the driving the first moving unit to move in the fourth direction or a fifth direction in response to the first user input comprises: driving the first moving unit or the second moving unit to move in the fourth direction or a fifth direction to a target position based on the target distance.
[0036] The target position is the position of the first moving unit or the second moving unit in the first direction. The first moving unit and the second moving unit is movable in the first direction. The target position of the first moving unit or the second moving unit corresponds to a target position of the first ball in the first groove and a target distance between the two moving unit 220 and 230.
[0037] In one optional implementation, an angle between an extension direction of the first groove and the first direction is an acute angle, a first contact line being unparallel to a second contact line, where the first contact line is made up of a succession of contact points of the first ball and the first contact surface and the second contact line is made up of a succession of contact points of the first ball and the second contact surface.
[0038] In one optional implementation, an extension direction of the first groove is parallel to the first direction, and a depth of the first groove changes along the first groove , a first contact line being unparallel to a second line, where the first contact line is made up of a succession of contact points of the first ball and the first contact surface, and the second contact line is made up of a succession of contact points of the first ball and the second contact surface.
[0039] In one optional implementation, an angle between the first contact surface and a first reference plane is an acute angle, and / or, an angle between the second contact surface and a first reference plane is an acute angle, where the first reference plane is perpendicular to a groove depth direction.
[0040] In one optional implementation, the first contact surface and / or the second contact surface is a flat plane.
[0041] In one optional implementation, the first contact surface and / or the second contact surface includes at least two parts not in a plane.
[0042] In one optional implementation, the at least two parts include a part that is a curved surface.
[0043] In one optional implementation, the first groove is a straight.
[0044] In one optional implementation, the first groove is a curved.
[0045] In one optional implementation, the connection unit includes a first magnetic piece and a second magnetic piece (252) , where the first magnetic piece is fixed to the first moving unit and the second magnetic piece is fixed to the second moving unit, an attraction force between the first magnetic piece and the second magnetic piece enabling the first ball to be sandwiched between the first contact surface and the second contact surface.
[0046] In one optional implementation, the connection unit includes an elastic component, where two ends of the elastic component are fixed to the first moving unit and the second moving unit respectively, a tensile force of the elastic component enabling the first ball to be sandwiched between the first contact surface and the second contact surface.
[0047] In one optional implementation, the base includes two shafts disposed at two sides of the optical axis respectively, the two shafts extending along the first direction; and the first moving unit and the second moving unit including two sliding grooves respectively to match the two shafts and sliding along the two shafts.
[0048] In one optional implementation, the two shafts include a first shaft and a second shaft, the first contact surface, the second contact surface , the connection unit , the first groove and the first ball being set near the first shaft; a first fixing position where the connection unit is fixed to the first moving unit is closer to the first shaft than a second fixing position where the connection unit is fixed to the second moving unit; and the first moving unit including a third magnetic piece and the first shaft is made of magnetic material, forming an attraction force between the third magnetic piece and the first shaft.
[0049] In one optional implementation, the base includes a second groove, the first moving unit includes a third surface and the second moving unit includes a fourth surface; a second ball is disposed between the third surface and the fourth surface without touching the third surface and the fourth surface; the second groove and the first groove are symmetric about a second reference plane, where the second reference plane is perpendicular to a first reference plane, the optical axis is in the second reference plane, and the first reference plane is perpendicular to a groove depth direction; and when the base supports the first moving unit and the second moving unit to move in the first direction, the second ball moves along the second groove.
[0050] In one optional implementation, the first moving unit is a lens supporter and the second moving unit is a lens supporter.
[0051] In one optional implementation, the first moving unit is a lens supporter and the second moving unit is a mask.
[0052] According to a third aspect, an embodiment of this application provides an electronic device including the imaging module in the first aspect or any optional implementation of the first aspect.
[0053] According to a fourth aspect, an embodiment of this application provides a computer-readable storage medium, including instructions. When the instructions run on a computer, the computer is enabled to perform the method in the second aspect or any optional implementation of the second aspect.
[0054] According to a fifth aspect, an electronic device is provided, including a processor and a memory. The processor is connected to the memory. The memory is configured to store instructions and the processor is configured to execute the instructions. When the processor executes the instructions stored in the memory, the processor is enabled to perform the method in the second aspect or any optional implementation of the second aspect.
[0055] According to a sixth aspect, a chip system is provided, where the chip system includes a memory and a processor, where the memory is configured to store a computer program, and the processor is configured to invoke the computer program from the memory and run the computer program, so that a device on which the chip system is disposed performs the method in the second aspect or any optional implementation of the second aspect.
[0056] According to a seventh aspect, a computer program product is provided, when the computer program product runs on a device, the device is enabled to perform the method in the second aspect or any optional implementation of the second aspect.DESCRIPTION OF DRAWINGS
[0057] Fig. 1 is a schematic diagram of a structure of a system architecture according to an embodiment of this application.
[0058] Fig. 2 is a perspective diagram illustrating a structure of an imaging module according to an embodiment of this application.
[0059] Fig. 3 is an exploded perspective diagram illustrating the imaging module of Fig. 2 according to an embodiment of this application.
[0060] Fig. 4 shows an example of ball movement decomposition according to an embodiment of this application.
[0061] Fig. 5 is a perspective diagram illustrating a structure of an imaging module on a base side according to an embodiment of this application.
[0062] Fig. 6 shows examples of shapes of a first contact surface and a second contact surface according to an embodiment of this application.
[0063] Fig. 7 shows an example of a shape of a first groove according to an embodiment of this application.
[0064] Fig. 8 shows preloading of a ball into a groove according to an embodiment of this application.
[0065] Fig. 9 shows structures near shafts.
[0066] Fig. 10 shows a position of a connection unit according to an embodiment of this application.
[0067] Fig. 11 is a perspective diagram illustrating a structure of an imaging module according to another embodiment of this application.
[0068] Fig. 12 is a perspective diagram showing shapes of a first groove, a first contact surface, and a second contact surface according to the embodiment of Fig. 11.DESCRIPTION OF EMBODIMENTS
[0069] The technical solutions in this application will be described below with reference to the accompanying drawings.
[0070] Terms used in the following embodiments of this application are merely intended to describe specific embodiments, but are not intended to limit this application. Terms “one” , “a” , “the” , “the foregoing” , “this” , and “the one” of singular forms used in this specification and the appended claims of this application are also intended to include plural forms like “one or more” , unless otherwise specified in the context clearly. It should be further understood that, in the following embodiments of this application, “at least one” or “one or more” means one, two, or more. The term “and / or” describes an association relationship between associated objects and represents that three relationships may exist. For example, A and / or B may represent the following three cases: only A exists, both A and B exist, and only B exists. A and B may be in a singular or plural form. The character “ / ” generally indicates an “or” relationship between the associated objects.
[0071] Reference to “an embodiment” , “some embodiments” , or the like described in this specification indicates that one or more embodiments of this application include a specific feature, structure, or characteristic described with reference to the embodiments. Therefore, in this specification, statements, such as “in an embodiment” , “in some embodiments” , “in some other embodiments” , and “in other embodiments” , that appear at different places do not necessarily mean referring to a same embodiment, instead, but mean “one or more but not all of the embodiments” , unless otherwise specified. The terms “include” , “comprise” , “have” , and their variants all mean “include but are not limited to” , unless otherwise specified.
[0072] In the description of the present application, it should be noted that, unless otherwise stated, “multiple” means two or more. Further, the orientations or positional relationships indicated by the terms “upper” , “lower” , “left” , “right” , “inside” and / or “outside” are only used for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or must be constructed and operated in a specific orientation, which therefore cannot be understood as a limitation of the present application. In addition, the terms “first” , “second” , “third” and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. “Vertical” is not strictly vertical, but within an allowable range of error. “Parallel” is not strictly parallel, but within an allowable range of error.
[0073] The orientation words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly defined and limited, the terms “installed” , “linked” , and “connected” should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to specific circumstances.
[0074] Fig. 1 is a schematic diagram of an electronic device 100 according to an embodiment of this application.
[0075] The electronic device 100 according to the embodiment of this application is an electronic device with imaging functions (such as photographing or taking pictures) , such as a mobile phone, a notebook computer display, a tablet computer, a laptop computer, a personal digital assistant, a smartwatch, a digital television display, or a desktop computer.
[0076] Embodiments of the present application do not impose special restrictions on the specific form of electronic device. In an embodiment of this application, a smart phone is used as an example to describe the structure of the electronic device 100. Fig. 1 (a) and Fig. 1 (b) schematically illustrate a front image and a back image of the electronic device 100, respectively.
[0077] As shown in Fig. 1, the electronic device 100 may include a housing 101, a display 102, and a camera module 103.
[0078] The housing 101 forms a holding space for components of the electronic device 100. The housing 101 can also protect the electronic device 100 and support the electronic device 100. The display 102 and the camera module 103 are disposed in the housing 101 and connected to the housing 101. In some embodiments, the housing 101 may include a back cover provided opposite to the display screen 102 and a middle frame disposed inside the electronic device 100, and the display screen 102 and the camera module 103 may be fixed to the middle frame. The material of the housing 101 may be metal, plastic, ceramic, or glass.
[0079] The display 102 is used to display images, such as images captured by the camera module 103. The display 102 can be a liquid crystal display (LCD) screen, an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) , a flexible light-emitting diode (flex light-emitting diode, FLED) , a mini-LED, a micro-LED, a micro-OLED, a quantum dot light-emitting diode (quantum dot light-emitting diodes, QLED) , or the like. In some embodiments, the electronic device 100 may include one or more displays 102. The display 102 may be a flexible display or a conventional display. The display 102 may be disposed on the front and / or back of the electronic device 100. Here, the front side of the electronic device 100 may be understood as the side facing the user when the user uses the electronic device 100, and the back side of the electronic device 100 may be understood as the opposite side of the front side.
[0080] The camera module 103 is configured to capture static images or videos. The camera module 103 may be disposed on the front side and / or the back side of the electronic device 100.
[0081] Understandably, the position of the camera module 103 is schematically shown in Fig. 1. In some embodiments, when the camera module 103 is used as a front camera, it may be mounted anywhere on the front side of the electronic device 100 except the display screen 102, such as the next to the telephone receiver, the upper middle part of the electronic device 100, the lower part of the electronic device 100, or four corners of the electronic device 100. The camera module 103 may also be embedded in a through hole of the display 102. When the camera module 103 is used as a rear camera, it may be mounted anywhere on the back of the electronic device 100, such as the upper left corner, upper right corner, or upper middle position.
[0082] In some other embodiments, the camera module 103 may also be disposed not on the body of the electronic device 100, but on a protruding part of the body of the electronic device 100, or disposed on a movable or rotating component of the electronic device 100, where the component may be retracted or rotated from the body of the electronic device 100 so that the camera module 103 may be or partially hidden inside the electronic device 100. When the camera module 103 can be rotated relative to the electronic device 100, the camera module 103 is equivalent to the front camera and the rear camera, that is, by rotating the same camera module 103, a scene located on the front side of the electronic device 100 or located on the back side of the electronic device 100 can be captured.
[0083] In other embodiments, when the display screen 101 is foldable, with the display being in different situations, the camera module 103 may be used as a front camera or a rear camera.
[0084] The embodiments of the present application do not limit the number of camera modules 103. For example, the number of camera modules 103 on the electronic device100 may be one, two, four, or even more. Specifically, one or more camera modules 103 may be provided on the front side of the electronic device 100, and / or one or more camera modules 103 may be provided on the back side of the electronic device 100. When a plurality of camera modules 103 are provided, the plurality of camera modules 103 may be exactly the same, or different, for example, optical parameters, setting positions or the morphology of the lens for the plurality of camera modules 103 are different. The embodiments of the present application do not limit the relative positions of the plurality of camera modules.
[0085] Optionally, in some embodiments, the electronic device 100 may further include a protective layer 104 for protecting the camera module 103. The protective layer 104 is disposed on the housing 101 and covers the camera module 103. The material of the protective layer 104 may be glass, sapphire, ceramics, etc., and the embodiments of the present application is not specially limited. In some embodiments, the protective layer 104 is transparent, and the light outside the electronic device 100 may enter the camera module 103 through the protective layer 104.
[0086] It should be understood that the structure illustrated in Fig. 1 does not constitute a specific limit to the electronic device 100, and the electronic device 100 may include more or fewer components than shown, for example, the electronic device 100 may further include one or more of a battery, flashlight, a fingerprint recognition module, buttons, sensors and other components. The electronic device 100 may also be provided with a different arrangement of components from what is shown.
[0087] With the development of electronic devices, a photographing function continues to be optimized to give a camera of the electronic device similar performance to conventional cameras. A structure where at least two groups in the camera move at the same time with changing their gap is well-known to realize high function. However, the structure for the camera of the electronic device to change the gap between the two groups is usually complex.
[0088] In this application, an imaging module to change a gap between movable groups with a simple structure is proposed.
[0089] Fig. 2 is a perspective diagram illustrating a structure of an imaging module according to an embodiment of this application. Fig. 3 is an exploded perspective diagram illustrating the imaging module of Fig. 2. Fig. 4 shows an example of ball movement decomposition according to an embodiment of this application. Fig. 5 is a perspective diagram illustrating a structure of an imaging module on a base side according to an embodiment of this application.
[0090] The imaging module includes a base 210, a first moving unit 220, and a second moving unit 230, a first ball 240, and a connection unit 250. The first moving unit 220 is configured to support a first optical element 221; and the second moving unit 230 is configured to support a second optical element 231 with the same optical axis (an X axis) as the first optical element. The first moving unit 220 and the second moving unit 230 are arranged along a first direction (the optical axis direction or X axis) . The base 210 is configured to support the first moving unit 220 and the second moving unit 230 to be movable in the first direction. The first ball 240 is disposed between a first contact surface 222 of the first moving unit 220 and a second contact surface 232 of the second moving unit 230. The connection unit 250 is fixed to the first moving unit 220 and the second moving unit 230 and enables the first ball 240 to be sandwiched between the first contact surface 222 of the first moving unit 220 and the second contact surface 232 of the second moving unit 230. The first contact surface 222 and the second contact surface 232 are unparallel to each other. A first groove 211 is provided on the base 210, and the first ball 240 is able to move freely in the space configured by the first contact surface 222, the second contact surface 232, and the first groove 211.
[0091] The first contact surface 222 and the second contact surface 232 form a gap between the first moving unit 220 and the second moving unit 230, and the first ball 240 fills the gap as moving along the first groove 211, changing the distance between the first moving unit 220 and the second moving unit 230 as the first contact surface 222 and the second contact surface 232 are unparallel to each other. The first ball 240 always touches the first contact surface 222 and the second contact surface 232 when moving along the first groove 211. The technical solution of this application involves just a small number of components and is applicable to different movable groups.
[0092] The first moving unit 220 and the second moving unit 230 can be any unit in a camera that needs to change the gap while moving together. For example, a lens supporter supports a lens barrel that accommodates a lens, and a mask with an aperture is configured to control the amount of light reaching the lens, etc., which means the first moving unit 220 and the second moving unit 230 can be a lens supporter-mask pair or a lens supporter-lens supporter pair. By changing the gap for the lens supporter-mask pair, optimal F / NO can be set, which may lead to higher optical performance such as a modulation transfer function (MTF) . By changing the gap for the lens supporter-lens supporter pair, optical aberration can be suppressed, leading to higher optical performance. It is possible that the first moving unit 220 and the second moving unit 230 can be other units in a camera, which is not limited to examples in this application.
[0093] The base 210 supports the first moving unit 220 and the second moving unit 230 to be movable in the first direction by a guide unit. The guide unit can include a shaft 213, i.e., including a first shaft 2131 and a second shaft 2132 extending linearly in the first direction and a sliding groove 214 to match the shaft. The first shaft 2131 and the second shaft 2132 are each fixed at both ends of the base 210 and disposed at two sides (left side and right side) of the optical axis. The first moving unit 220 and the second moving unit 230 include two sliding grooves 2141 and 2142 that match the first shaft 2131 and the second shaft 2132 and can slide along the first shaft 2131 and the second shaft 2132 in the first direction. Also, the guide unit is not limited to the form proposed in this application, for example, the shaft can be replaced by a sliding block in any shape. Also, the numbers of shafts and sliding grooves are not limited to two, for example, it is possible that only the first shaft 2131 and the sliding groove 2141 exist.
[0094] The connection unit 250 can provide an attraction force or tensile force between the first moving unit 220 and the second moving unit 230. For one example, the connection unit 250 can include a first magnetic piece 251 and a second magnetic piece 252. The first magnet piece 251 is fixed to the first moving unit 220, and the second magnet piece 252 is fixed to the second moving unit 230. The attraction force between the first magnetic piece 251 and the second magnetic piece 252 enables the first ball 240 to be sandwiched between the first contact surface 222 and the second contact surface 232. For another example, the connection unit 250 can be any elastic component such as a spring, an elastic rope or another elastic component with its two ends fixed respectively to the first moving unit 220 and the second moving unit 230. The tensile force of the elastic component enables the first ball 240 to be sandwiched between the first contact surface 222 and the second contact surface 232. The connection unit 250 makes the first ball 240 always get in touch with the first contact surface 222 and the second contact surface 232 and allows the two units to move together along the first direction when only one of the first moving unit 220 and the second moving unit 230 is actuated by a driving unit, which is not shown in the figures.
[0095] The first groove 211, the first contact surface 222 and the second contact surface 232 are designed to guide the first ball 240 to move along the preset direction to change the distance between the first moving unit 220 and the second moving unit 230 according to a preset rule.
[0096] In one embodiment, the extension direction of the first groove 211 is diagonal to the first direction with an angle between the extension direction of the first groove 211 and the first direction being an acute angle. A first contact line is unparallel to a second contact line, where the first contact line is made up of a succession of contact points of the first ball 240 and the first contact surface 222, and the second contact line is made up of a succession of contact point of the first ball 240 and the second contact surface 232.
[0097] As the first moving unit 220 and the second moving unit 230 move in the first direction, the first ball 240 moves in the extension direction of the first groove 211 under the action of a force provided by the first contact surface 222 or the second contact surface 232. The moving of the first ball 240 along the first groove 211 can be decomposed into displacement in the first direction and displacement in the second direction (the Y-axis direction) , where the second direction is a direction perpendicular to the first direction and perpendicular to the depth direction of the first groove 211 (referred to as a third direction or a Z-axis direction) , as can be seen in Fig. 4. The displacement in the first direction enables the first ball 240 to move together with the first moving unit 220 and the second moving unit 230 along the optical axis, while the displacement in the second direction results in sliding of the first ball 240 between the first contact surface 222 and the second contact surface 232 in the second direction.
[0098] The base 210 and the first groove 211 do not move when the first moving unit 220 and the second moving unit 230 move. Fig. 4 also schematically shows positions of the first ball 240 in the track of the first groove 211 with the moving of the first moving unit 220 and the second moving unit 230 along the minus X axis direction. As the direction of the first groove 211 is diagonal to the optical axis, the position of the first ball 240 is closer to the optical axis in the right diagram of Fig. 4. The position of the first ball between the first contact surface 222 and the second contact surface changes in the Y direction as the first moving unit 220 and the second moving unit 230 do not move in the Y direction. The first moving unit 220 and the second moving unit 230 are thus pulled closer by the connection unit 250 to always sandwich the first ball 240. Also, when the first moving unit 220 and the second moving unit move along the plus X axis direction, the gap between the two moving units will be broadened by the first ball 240.
[0099] It can be concluded that with the shape of the first groove 211, the shape of the first contact surface 222 and the shape of the second contact surface 232 determined, there is a corresponding relationship between the position of the first ball 240 relative to the first groove 211 and the distance of the first moving unit 220 and the second moving unit 230. So we can obtain a desired distance changing rule with carefully designed shape of the first groove 211, shape of the first contact surface 222 and shape of the second contact surface 232.
[0100] For example, if a user takes photos or videos with an electronic device including the above imaging module and changes settings such as changing imaging modes or focusing, which involves a changing in the distance of the first moving unit 220 and the second moving unit 230. Then, the driving unit can drive the first moving unit 220 (or the second moving unit 230) to move in the first direction with the second moving unit 230 to change the gap between the two moving units. Refer to Fig. 5, if the distance of the two units needs to be decreased, the driving unit can drive the first moving unit to move in the minus X direction. Further, it is possible that a target distance is determined based on the settings. It is understandable that there is a mapping relationship between a position of the first moving unit 220 (the second moving unit 230) and the distance of the two moving units 220 and 230 with determined shapes of the first grove 211, the first contact surface 222 and the second contact surface 232. Then the driving unit can drive the first moving unit 220 to move to a target position based on the mapping relationship.
[0101] Also, it is possible that the user changes the settings by e.g. a rotation button and the moving of the two moving unit 220 and 230 can be determined by the rotating direction and rotation degree of the rotation button. For example, if the rotation button is rotated clockwise, the driving unit may drive the first moving unit 220 to move in the minus X direction and if rotation button is rotated anticlockwise, the driving unit may drive the first moving unit 220 to move in the positive X direction. With a greater rotation degree, the first moving unit 220 moves a greater distance.
[0102] While the first ball 240 moves between the first contact surface 222 and the second contact surface 232, the first contact line and the second contact line form. As the first contact line is unparallel to the second contact line, while the ball moves along the first contact line, the distance (the gap) between the first moving unit 220 and the second moving unit 230 changes.
[0103] Fig. 5 is a perspective diagram illustrating a structure of an imaging module on a base side. Refer to Fig. 5, as the first ball 240 moves from the left side to the right side, the first moving unit 220 and the second moving unit 230 are “pulled” to each other by the connection unit 250 to always sandwich the first ball 240, decreasing the distance between the two moving units.
[0104] The first contact surface 222 can be parallel to the third direction, and the second contact surface 232 can also be parallel to the third direction (the third direction is the groove depth direction or Z-axis direction) . For one example, the first contact surface 222 and the second contact surface 232 are symmetric about the Y-Z plane. It is possible that the first contact surface 222 and the second contact surface 232 are flat planes or curved surfaces.
[0105] The first contact surface 222 and / or the second contact surface 232 can be an entire flat plane, and then the distance between the first moving unit 220 and the second unit 230 decreases / increases linearly as the first ball 240 moves between the first contact surface 222 and the second contact surface 232. Fig. 6 shows a schematic diagram of shapes of the first contact surface 222 and the second contact surface 232. As seen from Fig. 6 (a) , the distance decreases linearly while the first ball 240 approaches the optical axis.
[0106] Optionally, the first contact surface 222 and the second contact surface 232 include at least two parts along the Y axis not in a plane. Any one of the at least two parts can be a flat plane or a curved surface. Refer to Fig. 6 (b) , for example, the second contact surface 232 (and the first contact surface 222) includes three parts, part 2321, part 2322 and part 2323 that are not in a plane. When the first ball 240 moves to the part 2321, the distance between the first moving unit 220 and the second moving unit 230 is constant. When the ball moves to the part 2322 or the part 2323, the distance between the first moving unit 220 and the second moving unit 230 decreases, and the change of distance may follow different rules for the part 2322 and the part 2323.
[0107] As seen in Fig. 6 (c) , the second contact surface 232 (and the first contact surface 222) includes four parts, part 2324, part 2325, part 2326, and part 2327. When the first ball 240 moves between the first contact surface 222 and the second contact surface 232, the distance decreases for the part 2324 and the part 2325, and then increases for the part 2326, finally remains constant for the part 2327.
[0108] It is possible that the first contact surface 222 and the second contact surface 232 are asymmetric about the Y-Z plane. For example, the contact surface 222 is an entire flat plane like Fig. 6 (a) while the contact surface 232 includes at least two parts like Fig. 6 (b) or Fig. 6 (c) . Fig. 6 (d) to Fig. 6 (f) show other three examples of the shapes of the first contact surface 222 and the second contact surface 232. Fig. 6 (d) shows that the first contact surface 222 and the second contact surface are curved planes symmetric about the Y-Z plane. Fig 6 (e) shows that the first contact surface 222 is a flat plane while the second contact surface 232 is a curved surface. Fig. 6 (f) shows that the first contact surface 222 or the second contact surface 232 includes two parts, one is a flat plane, and another is a curved surface.
[0109] In this application, in addition to the shapes of the first contact surface 222 and the second contact surface 232, the shape of the first groove 211 is not limited to be straight shown in Fig. 2. For example, the first groove 211 can be a curved line like Fig. 7. The shape of the first groove 211 can be designed to be combined with the shape of the first contact surface 222 and the second contact surface 232 to change the distance between the first moving unit 220 and the second moving unit in a desired way.
[0110] It is understandable that the examples shown in Fig. 6 and Fig. 7 do not limit the protection scope of this application, and it’s flexible to change the shapes of the first contact surface 222 and the second contact surface 232 and the shape of the first groove 211 to freely set the gap (or change the distance) between the first moving unit 220 and the second moving unit 230.
[0111] In the embodiments of this application, to preload the first ball 240 into the first groove 211, the first contact surface 222 and / or the second contact surface 232 can provide a force that has a component in the base direction (minus Z direction, or downwards) . The angle between the X-Y plane (first reference plane) and the first contact surface (and / or the angle between the X-Y plane and the second contact surface) is acute (0°<angle<90°) . As seen from Fig. 8, the second contact surface 232 has a small tilt angle relative to the Z axis and slightly faces downwards. The first contact surface 222 can also be set similarly to the second contact surface 232. Thus, the first ball 240 is preloaded to the first groove 211 and can move along the first groove 211 with less vibration or rattling.
[0112] As mentioned before, the first moving unit 220 and the second moving unit 230 can move by the guide unit. In an example that the guide unit includes two shafts (the first shaft 2131 and the second shaft 2132) and gliding grooves matching the two shafts, the first ball 240, the first contact surface 222 and the second contact surface 232, the connection unit 250 and the first groove 211 can be set near the first shaft 2131 (aside A) relative to the second shaft 2132. Then near the second shaft 2132 (aside B) , the base 210 also includes a second groove 212. As seen in Fig. 9, the second groove 212 can have the same shape as the first groove 211. The first groove 211 and the second groove 212 are symmetric about a second reference plane, where the second reference plane is perpendicular to a first reference plane, the optical axis is in the second reference plane, and the first reference plane is perpendicular to a groove depth direction. The first moving unit 220 includes a third surface 222’ and the second moving unit 230 includes a fourth surface 232’. A second ball 260 is provided between the third surface 222’ and the fourth surface 232’. When the base 210 supports the first moving unit 220 and the second moving unit 230 moving in the first direction, the second ball 260 moves along the second groove 212 without getting in touch with the third surface 222’ and the fourth surface 232’.
[0113] As the second ball 260 does not get in touch with the third surface 222’ and the fourth surface 232’, the distance between the first moving unit 220 and the second moving unit 230 is determined by the side A, and a structure on the side B will not influence gap accuracy between the two moving units. But the structure on the side B will reduce the risk in reliability in cases of the imaging module falling or other cases as the second ball 260 fills the gap on the side B as much as possible.
[0114] Also, it is possible that on the side B, the second ball 260, the third surface 222’, the fourth surface 232’ and the second groove 212 are not set in the imaging module.
[0115] The connection unit 250 can be a pair of magnetic pieces, or an elastic component to provide a force towards each other between the first moving unit 220 and the second moving unit 230. In cases that two shafts are provided on two sides of the optical axis. The connection unit 250 can be set only on one side. Fixing positions of the connection unit 250 (afirst magnetic piece 251, a second magnetic piece 252 or an elastic component) can be designed slightly out of position (alink line of the fixing position of the connection unit to the first moving unit 220 and the second moving unit 230 is unparallel to the X axis) to preload the first moving unit 220 or the second moving unit 230 to the shaft or the base 210. As seen in Fig. 10, the first magnetic piece 251 is fixed to the first moving unit 220, and the second magnetic piece is fixed to the second moving unit 230. As the first magnetic piece is closer to the first shaft 2131 than the second magnetic piece, the attraction force on the second moving unit 230 (or the second magnetic piece) has a component pointing to the base 210, which presses the second moving unit to the base 210 or the first shaft 2131. Also, a third magnetic piece 253 is disposed on the first moving unit 220, and the first shaft 2131 is made of magnetic material, forming an attraction force between the third magnetic piece 253 and the first shaft 2131, and then the first moving unit 220 is also preloaded to the first shaft 2131.
[0116] It is understandable that when the second moving unit 230 can also be preloaded to the first shaft 2131 by a magnetic piece like the third magnetic piece 253, it is also possible that the number of magnetic pieces can be set according to the number of shafts, so as to provide a better preloading effect. When the connection unit 250 is an elastic component, the preloading effect can also be set by fixing positions of the elastic component, which is not shown in Fig. 10.
[0117] Further, the preloading of the first moving unit 220 is achieved by the third magnetic piece 253 and the shaft, while the preloading of the second moving unit 230 in Fig. 10 is achieved by the connection unit 250, it is possible that the third magnetic piece is fixed to the second moving unit 230 to preload it to the shaft, and the first magnetic piece is set farther away from the first shaft to preload the first moving unit 220.
[0118] To change the gap or distance between the first moving unit 220 and the second moving unit 230, another technical solution is provided in this application. As shown in Fig. 11 and Fig. 12, the depth of the first groove 211 can change along the groove extension direction (extension direction of the groove) . The first groove 211 can be set to be parallel to the optical axis. The first contact line is unparallel to the second contact line, where the first contact line is made up of a succession of contact points of the first ball 240 and the first contact surface 222, and the second contact line is made up of a succession of contact points of the first ball 240 and the second contact surface 232.
[0119] As the first groove 211 extends parallelly to the first direction, and the depth of the first groove 211 changes along the groove extension direction, the first ball 240 moves in the third direction between the first contact surface 222 and the second contact surface 232, changing the gap between the first moving unit 220 and the second moving unit 230. The first contact surface 222 and / or the second contact surface 232 is unparallel to the Y-Z plane and tilt towards the depth direction of the first groove 211 (downwards) . Thus, not only the gap between the first moving unit 220 and the second moving unit 230 is changed, but also the first ball 240 is preloaded to the first groove 211 due to the first contact surface 222 and / or the second contact surface 232.
[0120] As shown in Fig. 11, the first contact surface 222 and the second contact surface 232 tilt towards the first groove 211, providing the first ball 240 with a force that has a component to the first groove 211. As the first ball 240 moves from the right side to the left side (along the minus X axis) along the first groove 211, the ball moves downwards (the minus Z-axis direction) between the first contact surface 222 and the second contact surface 232, narrowing the gap between the first moving unit 220 and the second moving unit 230.
[0121] Also, Fig. 11 shows an example that the first contact surface 222 and the second contact surface 232 are entire flat planes, so as to introduce the embodiment of this application. It is possible that the first contact surface 222 and the second contact surface 232 can include several parts along the Z axis similar to examples shown in Fig. 6, where any one of the parts can be a flat plane or a curved surface. Also, the depth of the first groove 211 changes linearly along the first groove 211 in Fig. 11. It is applicable that the depth of the first groove 211 changes according to any rule along the groove. For example, the depth of the first groove 211 can have several parts that change according to different rules, quadratic functionally, constantly, and so on. The rule of the depth of the first groove 211can be designed combined with the shape of the first contact surface 222 and the second contact surface 232, which makes the gap between the first moving unit and the second moving unit be set freely.
[0122] Also, the structure on the other side can be similar to the structure described above when there are two shafts, and the first groove 211, the first ball 240, the first contact surface 222 and the second contact surface are set near the first shaft 2131. A second ball, a second groove, a third surface and a fourth surface are set near the second shaft. When the second ball moves along the second groove, the second ball moves between the third surface and the fourth surface without getting in touch with the third surface and the fourth surface.
[0123] It is to be noted that the extension direction of the first groove 211 can be set diagonal to the first direction with the depth of the first groove changing along the first groove 211. Then the design of the first groove shape, the depth changing rule and the shape of the first contact surface 222 and the second contact surface 232 can be combined for a desirable gap changing mode.
[0124] Also, the imaging module may include other parts not shown in Fig. 2 to Fig. 12. For example, other lens barrels or masks with different parameters from the first moving unit 220 or the second moving unit 230. When the imaging module works, gap between the first moving unit 220 and the second moving unit is regulated by technical solution provided above. Gap between other parts and the first moving unit 220 or the second moving unit 230 may also need to be adjusted. In some embodiments, the first moving unit 220 and the second moving unit 230 may as a whole move to flexibly change the gap. Also, it is possible that gap between the first moving unit 220 (and / or the second moving unit 230) and other part is changed with similar structure like that provided above to and / or the second moving 230. Then, structures for changing different gaps may be designed together (shape of the grooves and contact surfaces for each structure) to obtain a desired gap e.g., between the first moving unit and the second moving unit and between the first moving unit 220 and other part at the same time.
[0125] It may be clearly understood by a person skilled in the art that, for the purpose of convenient and brief description, for a detailed working process of the foregoing system, apparatus, and unit, reference is made to a corresponding process in the foregoing method embodiments, and details are not described herein again.
[0126] The foregoing descriptions are merely specific implementations of this application, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application.
Claims
1.An imaging module, comprising:a first moving unit (220) configured to support a first optical element;a second moving unit (230) configured to support a second optical element with the same optical axis as the first optical element;a base (210) configured to support the first moving unit (220) and the second moving unit (230) to be movable in a first direction, wherein the first direction is a direction of the optical axis; anda connection unit (250) fixed to the first moving unit (220) and the second moving unit (230) and configured to enable a first ball (240) to be sandwiched between a first contact surface (222) of the first moving unit (220) and a second contact surface (232) of the second moving unit (230) , wherein the first contact surface (222) faces the second contact surface (232) along the first direction, and the first contact surface (222) is unparallel to the second contact surface (232) ;wherein the base (210) comprises a first groove (211) to accommodate the first ball (240) , a position of the first ball (240) between the first contact surface (222) and the second contact surface (232) changing while the first ball (240) moves along the first groove (211) , enabling a distance between the first moving unit (220) and the second moving unit (230) to be changed.2.The imaging module of claim 1, wherein an angle between an extension direction of the first groove (211) and the first direction is an acute angle, a first contact line being unparallel to a second contact line, wherein the first contact line is made up of a succession of contact points of the first ball (240) and the first contact surface (222) , and the second contact line is made up of a succession of contact points of the first ball (240) and the second contact surface (232) .3.The imaging module of claim 1, wherein an extension direction of the first groove (211) is parallel to the first direction, and a depth of the first groove (211) changes along the first groove (211) , a first contact line being unparallel to a second contact line, wherein the first contact line is made up of a succession of contact points of the first ball (240) and the first contact surface (222) , and the second contact line is made up of a succession of contact points of the first ball (240) and the second contact surface (232) .4.The imaging module of any one of claims 1 to 3, wherein an angle between the first contact surface (222) and a first reference plane is an acute angle, and / or, an angle between the second contact surface (232) and a first reference plane is an acute angle, wherein the first reference plane is perpendicular to a groove depth direction.5.The imaging module of any one of claims 1 to 4, wherein the first contact surface (222) and / or the second contact surface (232) is a flat plane.6.The imaging module of any one of claims 1 to 4, wherein the first contact surface (222) and / or the second contact surface comprises at least two parts not in a plane.7.The imaging module of claim 6, wherein the at least two parts comprise a part that is a curved surface.8.The imaging module of any one of claims 1, 2, and 4 to 7, wherein the first groove (211) is straight.9.The imaging module of any one of claims 1, 2, and 4 to 7, wherein the first groove (211) is curved.10.The imaging module of any one of claims 1 to 9, wherein the connection unit (250) comprises a first magnetic piece (251) and a second magnetic piece (252) , wherein the first magnetic piece (251) is fixed to the first moving unit (220) , and the second magnetic piece (252) is fixed to the second moving unit (230) , an attraction force between the first magnetic piece (251) and the second magnetic piece (252) enabling the first ball (240) to be sandwiched between the first contact surface (222) and the second contact surface (232) .11.The imaging module of any one of claims 1 to 9, wherein the connection unit (250) comprises an elastic component, wherein two ends of the elastic component are fixed to the first moving unit (220) and the second moving unit (230) respectively, a tensile force of the elastic component enabling the first ball (240) to be sandwiched between the first contact surface (222) and the second contact surface (232) .12.The imaging module of any one of claims 1 to 11, wherein the base (210) comprises two shafts (213) disposed at two sides of the optical axis respectively, the two shafts (213) extending along the first direction; and the first moving unit (220) and the second moving unit (230) comprise two sliding grooves (214) respectively to match the two shafts (213) and slide along the two shafts (213) .13.The imaging module of claim 12, wherein the two shafts (213) comprise a first shaft (2131) and a second shaft (2132) , the first contact surface (222) , the second contact surface (232) , the connection unit (250) , the first groove (211) and the first ball (240) being set near the first shaft; a first fixing position where the connection unit (250) is fixed to the first moving unit (220) is closer to the first shaft than a second fixing position where the connection unit (250) is fixed to the second moving unit (230) ; and the first moving unit (220) comprising a third magnetic piece (253) and the first shaft (2131) is made of magnetic material, forming an attraction force between the third magnetic piece (253) and the first shaft (2131) .14.The imaging module of any one of claims 1 to 13, wherein the base (210) comprises a second groove (212) , the first moving unit (220) comprises a third surface (222’) , and the second moving unit (230) comprises a fourth surface (232’) ; a second ball (260) is disposed between the third surface (222’) and the fourth surface (232’) without touching the third surface (222’) and the fourth surface (232’) ; the second groove (212) and the first groove (211) are symmetric about a second reference plane, wherein the second reference plane is perpendicular to a first reference plane, the optical axis is in the second reference plane, and the first reference plane is perpendicular to a groove depth direction; and when the base (210) supports the first moving unit (220) and the second moving unit (230) to move in the first direction, the second ball (260) moves along the second groove (212) .15.The imaging module of any one of claims 1 to 14, wherein the first moving unit (220) is a lens supporter, and the second moving unit (230) is a lens supporter.16.The imaging module of any one of claims 1 to 14, wherein the first moving unit (220) is a lens supporter, and the second moving unit (230) is a mask.17.An imaging method applied to an imaging module, the imaging module comprising: a first moving unit (220) configured to support a first optical element; a second moving unit (230) configured to support a second optical element with the same optical axis as the first optical element; a base (210) configured to support the first moving unit (220) and the second moving unit (230) to be movable in a first direction, wherein the first direction is a direction of the optical axis; and a connection unit (250) fixed to the first moving unit (220) and the second moving unit (230) and configured to enable a first ball (240) to be sandwiched between a first contact surface (222) of the first moving unit (220) and a second contact surface (232) of the second moving unit (230) , wherein the first contact surface (222) faces the second contact surface (232) along the first direction, and the first contact surface (222) is unparallel to the second contact surface (232) ; wherein the base (210) comprises a first groove (211) to accommodate the first ball (240) , a position of the first ball (240) between the first contact surface (222) and the second contact surface (232) changing while the first ball (240) moves along the first groove (211) ;the imaging method comprising:receiving a first user input;driving the first moving unit (220) or the second moving unit (230) to move in a fourth direction or a fifth direction in response to the first user input, wherein the fourth direction and the fifth direction are opposite directions of the direction of the optical axis.18.The imaging method of claim 17, wherein the method further comprises:determine a target distance between the first moving unit (220) and the second moving unit (230) based on the first user input; the driving the first moving unit (220) or the second moving unit (230) to move in the fourth direction or a fifth direction in response to the first user input comprises:driving the first moving unit (220) or the second moving unit (230) to move in the fourth direction or a fifth direction to a target position based on the target distance.19.The imaging method of claim 17 or 18, wherein an angle between an extension direction of the first groove (211) and the first direction is an acute angle, a first contact line being unparallel to a second contact line, wherein the first contact line is made up of a succession of contact points of the first ball (240) and the first contact surface (222) , and the second contact line is made up of a succession of contact points of the first ball (240) and the second contact surface (232) .20.The imaging method of claim 17 or 18, wherein an extension direction of the first groove (211) is parallel to the first direction, and a depth of the first groove (211) changes along the first groove (211) , a first contact line being unparallel to a second contact line, wherein the first contact line is made up of a succession of contact points of the first ball (240) and the first contact surface (222) , and the second contact line is made up of a succession of contact points of the first ball (240) and the second contact surface (232) .21.The imaging method of any one of claims 17 to 20, wherein an angle between the first contact surface (222) and a first reference plane is an acute angle, and / or, an angle between the second contact surface (232) and a first reference plane is an acute angle, wherein the first reference plane is perpendicular to a groove depth direction.22.The imaging method of any one of claims 17 to 21, wherein the first contact surface (222) and / or the second contact surface (232) is a flat plane.23.The imaging method of any one of claims 17 to 21, wherein the first contact surface (222) and / or the second contact surface comprises at least two parts not in a plane.24.The imaging method of claim 23, wherein the at least two parts comprise a part that is a curved surface.25.The imaging method of any one of claims 17 to 19, and 21 to 24, wherein the first groove (211) is straight.26.The imaging method of any one of claims 17 to 19, and 21 to 24, wherein the first groove (211) is curved.27.The imaging method of any one of claims 17 to 26, wherein the connection unit (250) comprises a first magnetic piece (251) and a second magnetic piece (252) , wherein the first magnetic piece (251) is fixed to the first moving unit (220) , and the second magnetic piece (252) is fixed to the second moving unit (230) , an attraction force between the first magnetic piece (251) and the second magnetic piece (252) enabling the first ball (240) to be sandwiched between the first contact surface (222) and the second contact surface (232) .28.The imaging method of any one of claims 17 to 26, wherein the connection unit (250) comprises an elastic component, wherein two ends of the elastic component are fixed to the first moving unit (220) and the second moving unit (230) respectively, a tensile force of the elastic component enabling the first ball (240) to be sandwiched between the first contact surface (222) and the second contact surface (232) .29.The imaging method of any one of claims 17 to 28, wherein the base (210) comprises two shafts (213) disposed at two sides of the optical axis respectively, the two shafts (213) extending along the first direction; and the first moving unit (220) and the second moving unit (230) comprise two sliding grooves (214) respectively to match the two shafts (213) and slide along the two shafts (213) .30.The imaging method of claim 29, wherein the two shafts (213) comprise a first shaft (2131) and a second shaft (2132) , the first contact surface (222) , the second contact surface (232) , the connection unit (250) , the first groove (211) and the first ball (240) being set near the first shaft; a first fixing position where the connection unit (250) is fixed to the first moving unit (220) is closer to the first shaft than a second fixing position where the connection unit (250) is fixed to the second moving unit (230) ; and the first moving unit (220) comprising a third magnetic piece (253) and the first shaft (2131) is made of magnetic material, forming an attraction force between the third magnetic piece (253) and the first shaft (2131) .31.The imaging method of any one of claims 17 to 30, wherein the base (210) comprises a second groove (212) , the first moving unit (220) comprises a third surface (222’) , and the second moving unit (230) comprises a fourth surface (232’) ; a second ball (260) is disposed between the third surface (222’) and the fourth surface (232’) without touching the third surface (222’) and the fourth surface (232’) ; the second groove (212) and the first groove (211) are symmetric about a second reference plane, wherein the second reference plane is perpendicular to a first reference plane, the optical axis is in the second reference plane, and the first reference plane is perpendicular to a groove depth direction; and when the base (210) supports the first moving unit (220) and the second moving unit (230) to move in the first direction, the second ball (260) moves along the second groove (212) .32.The imaging method of any one of claims 17 to 31, wherein the first moving unit (220) is a lens supporter, and the second moving unit (230) is a lens supporter.33.The imaging method of any one of claims 17 to 31, wherein the first moving unit (220) is a lens supporter, and the second moving unit (230) is a mask.34.An electronic device, comprising the imaging module according to any one of claims 1 to 16.
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