Camera module and electronic device

Abstract

The present invention relates to an electronic device and its camera module. The camera module includes a lens, photosensitive elements disposed on opposite sides of the lens, and a reflecting prism. It further includes a first-direction anti-shake structure and a second-direction anti-shake structure, which are respectively used to drive the photosensitive element to rotate around a first axis and drive the photosensitive element to translate along a second axis perpendicular to the first axis; a third-direction anti-shake structure, which is used to drive the reflecting prism to rotate around a rotation axis parallel to the second axis, and the axis of the rotation axis is parallel to the incident light surface. The present invention has anti-shake functions in three directions in the camera module, increasing the dimension of anti-shake and enhancing the anti-shake function. At the same time, the second-direction anti-shake is carried out at the photosensitive element, and the lens is only used to achieve autofocus in the Z-axis direction. Thus, the lens avoids complex anti-shake designs and high power consumption, and therefore the size of the camera module in the Y-axis direction can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of imaging technology, and particularly to a camera module, and also to an electronic device having such a camera module. Background Art

[0002] For terminal devices with imaging functions such as mobile phones, anti-shake functions are currently required to avoid jitter of the imaging device caused by the user's hand shaking or other factors during the shooting process and ensure clear captured images. In traditional solutions, such as the micro long-focus camera module used in mobile phones, the lens has an anti-shake structure for translation in the X direction and the Y-axis direction, and also has an autofocus function along the Z-axis (i.e., the optical axis). However, the above solutions have few anti-shake dimensions and a single anti-shake function, which also limits the camera module from achieving a longer focal length and results in an overly large size of the camera module, especially the size of the camera module in the Y-axis direction is too large. Summary of the Invention

[0003] Based on this, it is necessary to propose a camera module for the problem of how to achieve multi-axis anti-shake functions and facilitate long-focus focusing.

[0004] A camera module includes: a lens, photosensitive elements located on opposite sides of the lens, and a reflecting prism. The reflecting prism has an incident light surface. The camera module further includes:

[0005] A first anti-shake mechanism, including a first-direction anti-shake structure and a second-direction anti-shake structure, wherein the first-direction anti-shake structure is used to drive the photosensitive element to rotate around a first axis, and the second-direction anti-shake structure is used to drive the photosensitive element to translate along a second axis perpendicular to the first axis;

[0006] A second anti-shake mechanism, including a third-direction anti-shake mechanism, for driving the reflecting prism to rotate around a rotation axis parallel to the second axis, and the axis of rotation is parallel to the incident light surface.

[0007] Compared with the traditional technology of setting anti-shake structures in the X-axis direction and the Y-axis direction on the lens, the above camera module has an anti-shake function in three directions, which increases the dimension of anti-shake and the anti-shake function. At the same time, the second-direction anti-shake is performed at the photosensitive element, and the lens is only used to achieve autofocus in the Z-axis direction. Therefore, the lens avoids complex anti-shake designs and high power consumption, so the size of the camera module in the Y-axis direction can be reduced, which is beneficial to achieving thinness, and is also beneficial to setting the lens as a long-focus module with a longer focal length, so as to better meet the needs of long-distance shooting.

[0008] In one embodiment, the first anti-shake mechanism includes: a moving part connected to the photosensitive element; a fixed part fixed in the housing and configured to exert a force on the moving part to drive the photosensitive element to rotate about the first axis, and the fixed part is further configured to drive the photosensitive element to translate along the second axis; and an elastic reset member connecting the fixed part and the moving part. The photosensitive element is disposed on the moving part and can be driven by the fixed part to move, thereby realizing anti-shake in the first direction and anti-shake in the second direction, and improving the shooting quality of the camera module.

[0009] In one embodiment, the moving part includes: a movable bracket, a first rigid-flexible printed circuit board, a first moving magnetic member, and a second moving magnetic member. The first moving magnetic member and the second moving magnetic member are both disposed on the first rigid-flexible printed circuit board, and the first rigid-flexible printed circuit board is disposed on the movable bracket; the fixed part includes: a fixed bracket fixed in the housing, a first fixed magnetic unit and a second fixed magnetic unit disposed on the fixed bracket, and the fixed bracket is connected to the movable bracket through the elastic reset member; wherein, the photosensitive element is disposed on the first rigid-flexible printed circuit board, and at least one of the first moving magnetic member and the first fixed magnetic unit is an electromagnetic unit. Through the cooperation of the first moving magnetic member and the first fixed magnetic unit, the photosensitive element is driven to rotate about the optical axis, and at least one of the second moving magnetic member and the second fixed magnetic unit is an electromagnetic unit. Through the cooperation of the second moving magnetic member and the second fixed magnetic unit, the photosensitive element is driven to translate along the second axis. The movement of the photosensitive element is realized by using the electromagnetic driving method, and anti-shake in the first direction and anti-shake in the second direction are realized, so as to achieve dual anti-shake and improve the imaging quality of the camera module; in addition, the electromagnetic driving method is simpler than the more complex mechanical driving structure, which is beneficial to the miniaturization of the camera module.

[0010] In one embodiment, the first rigid-flexible printed circuit board includes a first rigid circuit board and a first flexible circuit board connected to the first rigid circuit board. The first flexible circuit board is connected to the movable bracket. The photosensitive element and the first moving magnetic member are both disposed on the first rigid circuit board, and the second moving magnetic member is disposed on the first flexible circuit board. The photosensitive element and the first moving magnetic member are both disposed on the rigid part of the first rigid-flexible printed circuit board, which has good support. In addition, since the first rigid circuit board and the movable bracket are connected through the first flexible circuit board, and the first flexible circuit board has good flexibility, when the first rigid circuit board drives the photosensitive element to rotate, the force is transmitted to the movable bracket through the first flexible circuit board. Therefore, the connection part between the first rigid circuit board and the movable bracket is not easily broken.

[0011] In one embodiment, the fixing portion further includes a first magnetic sensor disposed on a side of the fixing bracket facing away from the lens for sensing a change in the position of the first moving magnetic member; the moving portion further includes a second magnetic sensor disposed on the first flexible printed circuit board for sensing the position of the second fixed magnetic unit. The first magnetic sensor can sense the position of the first moving magnetic member in real time, so that the driving mechanism can be accurately controlled through the control unit of the electronic device, and then the movement of the lens can be accurately controlled for combined use with Roll direction anti-shake to improve the anti-shake effect; the second magnetic sensor can sense the position of the second fixed magnetic unit in real time, so that the driving mechanism can be accurately controlled through the control unit of the electronic device, and then the movement of the lens can be accurately controlled for combined use with X direction anti-shake to improve the anti-shake effect.

[0012] In one embodiment, the first fixed magnetic unit is an electromagnetic coil and surrounds the first magnetic sensor; the second moving magnetic member is an electromagnetic coil and surrounds the second magnetic sensor. Placing the magnetic sensor in the center of the electromagnetic coil saves installation space.

[0013] In one embodiment, the second anti-shake mechanism includes the rotating shaft, a first magnetic element, a second magnetic element, and a second rigid-flex printed circuit board. The rotating shaft is supported in the housing of the camera module. The first magnetic element is fixedly connected to the reflecting prism. The second rigid-flex printed circuit board includes a second rigid circuit board disposed in the housing, and the second magnetic element is disposed on the second rigid circuit board. At least one of the first magnetic element and the second magnetic element is an electromagnetic unit. Through the cooperation of the first magnetic element and the second magnetic element, the reflecting prism is driven to rotate around the rotating shaft. The third direction anti-shake is achieved by rotating the reflecting prism through an electromagnetic driving method. The reflecting prism does not need to have a large translation distance in the third direction, nor does it need to be provided with a translation mechanism with a large size in the third direction. Therefore, the third direction anti-shake function is achieved and it is beneficial to realize the thinning of the camera module.

[0014] In one embodiment, the second anti-shake mechanism further includes a third magnetic sensor disposed on the second rigid circuit board for sensing a change in the position of the first magnetic element. The third magnetic sensor senses the change in the position of the first magnetic element in real time, and then accurately controls the driving mechanism through the control unit of the electronic device, and further accurately controls the movement of the lens for combined use with the third direction anti-shake to improve the anti-shake effect of the camera module.

[0015] In one embodiment, the camera module further includes a lens magnetic member and a fourth magnetic sensor. The lens magnetic member is fixedly connected to the lens. The fourth magnetic sensor is disposed on the second rigid circuit board, and the fourth magnetic sensor is used to sense the position change of the lens magnetic member. The position change of the lens magnetic member can be sensed in real time through the fourth magnetic sensor, so as to accurately control the driving mechanism and achieve rapid focusing of the camera module in the first-axis direction.

[0016] In one embodiment, the camera module further includes a driving mechanism for driving the lens to translate along the first axis. The driving mechanism includes a motor with a driving end fixed in the housing of the camera module and a force transmission member connecting the driving end to the lens. The motor drives the lens to move in the first-axis direction through the force transmission member, and rapid zooming or focusing can be achieved.

[0017] In one embodiment, the camera module further includes a guiding mechanism disposed in the housing for assisting the lens to move along the first axis. The guiding mechanism includes a guide rail and a sliding member. The guide rail is fixed in the housing, and the sliding member connects the force transmission member to the lens. In this way, when the motor works, the lens moves along the second-axis direction on the guide rail, moving smoothly without shaking, thereby achieving a good focusing effect and an imaging effect with good imaging quality and high picture clarity.

[0018] In one embodiment, the camera module further includes an internal frame fixed to the inner wall of the housing of the camera module. The lens, the reflecting prism, and the driving mechanism are all disposed on the internal frame. In this way, the internal frame, the lens, the reflecting prism, the driving mechanism, etc. can be pre-assembled into a module, which improves the modularity of the camera module and further improves the assembly efficiency when assembling the camera module.

[0019] In one embodiment, the camera module further includes a filter, and the filter is disposed on one side of the fixed bracket facing the lens. This can improve the shooting performance of the camera module.

[0020] In one embodiment, the elastic reset member is a spring piece. On the one hand, the spring piece provides an elastic force to reset the movable bracket; on the other hand, the spring piece serves to connect the movable bracket to the fixed bracket, and it is a supporting element of the movable bracket in the housing, and no additional supporting element needs to be provided.

[0021] In one embodiment, the axial direction of the first axis is consistent with the direction of the lens optical axis, and the light incident surface is parallel to the first axis. Since the axial direction of the first axis is consistent with the direction of the lens optical axis, the camera module can achieve rotational anti-shake around the optical axis, which increases the anti-shake function. Moreover, the lens is only used to achieve autofocus in the optical axis direction, so that the lens avoids complex anti-shake designs and high power consumption.

[0022] An electronic device is also proposed, including the camera module described in any one of the foregoing items. In this way, the electronic device has multiple anti-shake effects during shooting, and a telephoto module with a longer focal length can be selected as the lens, so as to better meet the needs of long-distance shooting. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the anti-shake principle of the camera module according to an embodiment of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the camera module according to an embodiment of the present invention. Detailed Embodiments

[0025] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] In the traditional technology, when a user holds an electronic device equipped with a camera module to take a picture, if the user's hand shakes or the electronic device shakes due to other factors, it is easy to cause the captured image to be unclear and the imaging quality to be poor. To solve the above problems, the present invention provides a camera module that can achieve multi-axis anti-shake functions and can be applied to electronic devices such as mobile phones and tablet computers.

[0029] As shown Figure 1 in the figure, the principle of the camera module 100 of the present invention to achieve multi-axis anti-shake function is illustrated. The camera module 100 is specifically a periscope camera module, mainly including a lens 10, a photosensitive element 20 and a reflecting prism 30 disposed on opposite sides of the lens 10. Among them, the reflecting prism 30, the lens 10, and the photosensitive element 20 are arranged in sequence from the object side to the image side, that is, the reflecting prism 30, the lens 10, and the photosensitive element 20 are arranged in sequence along the Z direction.

[0030] The camera module 100 simultaneously has anti-shake functions in the first direction, the second direction, and the third direction. Specifically, as Figure 1 shown in the figure, in the camera module 100, the first anti-shake function, or the rotational anti-shake function, is achieved by rotating the photosensitive element 20; the second-direction anti-shake function is achieved by translating the photosensitive element 20; and the third-direction anti-shake function is achieved by rotating the reflecting prism 30.

[0031] Figure 1 The attitude of the camera module 100 shown in the figure is a side view of the camera module 100, and the directions of the X, Y, and Z coordinate axes are illustrated. Among them, the first-direction anti-shake refers to the photosensitive element 20 rotating around the first axis, that is, rotating around the Z axis, that is, rotating in a first plane perpendicular to the Z axis, and the rotation direction is as shown by the arrow R1, so as to compensate for the image blur caused by the shake of the lens 10 in the first direction.

[0032] The second-direction anti-shake refers to the photosensitive element 20 translating along the second axis, that is, along the X axis, so as to compensate for the image blur caused by the shake of the lens 10 in the X-axis direction, and the moving direction is as Figure 1 shown by the arrow X in the figure. Among them, the X-axis direction is the direction perpendicular to the drawing plane, and the X axis is perpendicular to the Z axis. The second-direction anti-shake can be defined as the X-axis direction anti-shake function.

[0033] The third-direction anti-shake refers to rotating the reflecting prism 30 around a rotating shaft 710 parallel to the second axis, and the rotation direction is as Figure 1 shown by the arrow R2 in the figure, so that the position of the light incident surface 310 of the reflecting prism 30 in the Y-axis direction can be finely adjusted, thereby compensating for the image blur caused by the shake of the lens 10 in the Y-axis direction. The Y-axis direction refers to the up-and-down direction, and is also the height direction of the electronic device when the handheld electronic device performs long-distance shooting. Therefore, the third-direction anti-shake is achieved by rotating the reflecting prism 30 to adjust the position of the light incident surface 310 in the Y-axis direction. Specifically, when setting, the rotating shaft 710 and the light incident surface 310 are set to be parallel, that is, the axis of the rotating shaft 710 is parallel to the light incident surface 310. And it can be understood that the reflecting prism 30 rotates around the rotating shaft 710 in the direction shown by the arrow R2 in a second plane, and the second plane is perpendicular to the aforementioned first plane. The third-direction anti-shake can be defined as the Y-axis direction anti-shake function.

[0034] Figure 1 In the posture of the camera module 100 shown, the Z-axis is along the left-right direction, the rotation plane of the photosensitive element 20, i.e., the first plane, is perpendicular to the Z-axis, and more specifically, the first plane is perpendicular to the drawing plane; the rotation plane of the reflection prism 30 is the second plane, the second plane is parallel to the drawing plane, and the second plane is perpendicular to the first plane. The incident light surface 310 is parallel to the first axis.

[0035] Compared with the prior art in which an anti-shake structure in the X-axis direction and an anti-shake structure in the Y-axis direction are provided on the lens, the camera module 100 according to an embodiment of the present invention adds anti-shake in the first direction, thereby increasing the dimension of anti-shake and the anti-shake function. At the same time, compared with the prior art, in the present invention, the anti-shake in the second direction (corresponding to the anti-shake in the X-axis direction in the prior art) is changed to be performed at the photosensitive element 20, and the lens 10 is only used to achieve autofocus in the Z-axis direction. Therefore, the lens 10 avoids complex anti-shake design and large power consumption, and thus the size of the camera module 100 in the Y-axis direction can be reduced, which is beneficial to achieving thinning, and is also beneficial to setting the lens 10 as a telephoto module with a longer focal length, so as to better meet the needs of long-distance shooting.

[0036] The following will be combined with Figure 2 to describe in detail the camera module 100 according to an embodiment of the present invention.

[0037] As Figure 2 shown, a camera module 100 according to an embodiment includes a lens 10, a photosensitive element 20, a reflection prism 30, a driving mechanism, and a housing 50. The housing 50 has a receiving cavity 510, in which the lens 10, the photosensitive element 20, the reflection prism 30, and the driving mechanism are disposed. The photosensitive element 20 and the reflection prism 30 are located on both sides of the lens 10. The driving mechanism is used to drive the lens 10 to move along its Z-axis direction to achieve zooming or focusing. The driving mechanism includes a motor 410 having a driving end 411 and a force transmission member 420 connecting the driving end 411 to the lens 10.

[0038] Figure 2 is a top view schematic diagram of the camera module 100. Therefore, as shown by the X, Y, and Z coordinate axes in Figure 2 , Figure 2 in, the Z-axis direction is the left-right direction, the X-axis direction is the up-down direction, and the Y-axis direction is the direction perpendicular to the drawing plane. Figure 2 In, the Z-axis coincides with the optical axis of the lens 10, and the two directions are the same.

[0039] To achieve the multi-axis anti-shake function of the camera module 100, a first anti-shake mechanism and a second anti-shake mechanism are provided in the housing 50. The first anti-shake mechanism includes a first-direction anti-shake mechanism and a second-direction anti-shake mechanism, which are respectively used to achieve anti-shake in the first direction and the second direction; the second anti-shake mechanism includes a third-direction anti-shake mechanism, which is used to achieve anti-shake in the third direction. The first anti-shake mechanism and the second anti-shake mechanism can be implemented in different ways respectively, which will be described in detail by way of examples below.

[0040] As Figure 2 shown, the first anti-shake mechanism includes a moving part 610, a fixed part 620, and an elastic reset member 630 connecting the moving part 610 and the fixed part 620. Among them, the combination of the moving part 610 and the fixed part 620 is equivalent to a micro-electro-mechanical system. The moving part 610 can be fixed to the photosensitive element 20 and driven by the fixed part 620 to move together. The fixed part 620 is fixed in the accommodation cavity 510 of the housing 10, and the elastic reset member 630 provides the function of resetting the moving part 610.

[0041] As Figure 2 shown, the moving part 610 includes a movable bracket 611, a first flexible-rigid printed circuit board 612, a first moving magnetic member 613, and a second moving magnetic member 614. The first flexible-rigid printed circuit board 612 is disposed on the movable bracket 611, and both the first moving magnetic member 613 and the second moving magnetic member 614 are disposed on the first flexible-rigid printed circuit board 612. The fixed part 620 includes a fixed bracket 621 fixed in the housing 50, a first fixed magnetic unit 622 and a second fixed magnetic unit 623 disposed on the fixed bracket 621. The movable bracket 611 is connected to the fixed bracket 621 through the elastic reset member 630, so that the movable bracket 611 and the first flexible-rigid printed circuit board 612 can move relative to the fixed bracket 621.

[0042] In this embodiment, the photosensitive element 20 is disposed on the first flexible-rigid printed circuit board 612. At least one of the first moving magnetic member 613 and the first fixed magnetic unit 622 is an electromagnetic unit. Through the cooperation of the first moving magnetic member 613 and the first fixed magnetic unit 622, the photosensitive element 20 is driven to rotate in a first plane perpendicular to the Z-axis, thereby compensating for the image blur caused by the shake of the lens 10 in the first direction. Thus, the movable bracket 611, the first flexible-rigid printed circuit board 612, the first moving magnetic member 613, the fixed bracket 621, the first fixed magnetic unit 622, and the elastic reset member 630 constitute the first-direction anti-shake structure.

[0043] Anti-shake in the second direction is achieved by translating the photosensitive element 20. Among them, at least one of the second moving magnetic member 614 and the second fixed magnetic unit 623 is an electromagnetic unit. Through the cooperation of the second moving magnetic member 614 and the second fixed magnetic unit 623, the photosensitive element 20 is driven to translate in the X-axis direction, thereby achieving anti-shake in the second direction. The electromagnetic unit is a unit that generates magnetic force after being energized, such as an electromagnetic coil. Thus, the moving bracket 611, the first rigid-flexible board 612, the second moving magnetic member 614, the fixed bracket 621, the second fixed magnetic unit 623, and the elastic reset member 630 constitute the anti-shake structure in the second direction. Further, the first rigid-flexible board 612, the fixed bracket 621, and the elastic reset member 630 are shared by the anti-shake structure in the first direction and the anti-shake structure in the second direction, simplifying the overall anti-shake structure.

[0044] Specifically, the first rigid-flexible board 6112 includes a first rigid circuit board 6121 and a first flexible circuit board 6122 connected to the first rigid circuit board 6121. The first flexible circuit board 6122 is connected to the movable bracket 611. The photosensitive element 20 and the first moving magnetic member 613 are both disposed on the first rigid circuit board 6121, and the second moving magnetic member 614 is disposed on the first flexible circuit board 6122. When the first moving magnetic member 613 cooperates with the first fixed magnetic unit 622, the first rigid circuit board 6121 drives the photosensitive element 20 and the movable bracket 611 to rotate in a first plane perpendicular to the Z-axis, thereby achieving anti-shake in the first direction.

[0045] The second moving magnetic member 614 is disposed on the first flexible circuit board 6122. When the second moving magnetic member 614 interacts with the second fixed magnetic unit 623, the second moving magnetic member 614 drives the movable bracket 611 to translate in the X-axis direction through the first flexible circuit board 6122, thereby achieving anti-shake in the second direction.

[0046] In the above embodiments, both the photosensitive element 20 and the first moving magnetic member 613 are disposed on the rigid part of the first rigid-flexible board 6112, providing good support. In addition, since the first rigid circuit board 6121 is connected to the movable bracket 611 through the first flexible circuit board 6122, and the first flexible circuit board 6122 has good flexibility, when the first rigid circuit board 6121 drives the photosensitive element 20 to rotate, the force is transmitted to the movable bracket 611 through the first flexible circuit board 6122. Therefore, the connection part between the first rigid circuit board 6121 and the movable bracket 611 is not easily broken.

[0047] In the above embodiments, the first moving magnetic member 613 is specifically a magnet, and the first fixed magnetic unit 622 is an electromagnetic coil, and their positions correspond to each other. In other embodiments, the arrangements of the first moving magnetic member 613 and the first fixed magnetic unit 622 can also be: the first moving magnetic member 613 is an electromagnetic coil, and the first fixed magnetic unit 622 is a magnet; or both the first moving magnetic member 613 and the first fixed magnetic unit 622 are electromagnetic coils.

[0048] In addition, the second moving magnetic member 614 is an electromagnetic coil, and the second fixed magnetic unit 623 is a magnet, and their positions correspond to each other. In other embodiments, the arrangements of the second moving magnetic member 614 and the second fixed magnetic unit 623 can also be: the second moving magnetic member 614 is a magnet, and the second fixed magnetic unit 623 is an electromagnetic coil; or both the second moving magnetic member 614 and the second fixed magnetic unit 623 are electromagnetic coils.

[0049] In a preferred solution, the first moving magnetic member 613 is a magnet, and the first fixed magnetic unit 622 is an electromagnetic coil; the second moving magnetic member 614 is an electromagnetic coil, and the second fixed magnetic unit 623 is a magnet. In this way, the magnets for realizing anti-shake in the first direction and the magnets for realizing anti-shake in the second direction are located on different support elements and are spaced apart by a certain distance to avoid mutual influence.

[0050] In addition, the elastic reset member 630 is used to provide the reset of the movable bracket 611. As Figure 2 shown, in order to ensure the reset effect, a first magnet 617 is further provided on the movable bracket 611, and a second magnet 627 is correspondingly provided on the fixed bracket 621. The first magnet 617 and the second magnet 627 adsorb each other to assist in resetting the movable bracket 611.

[0051] In the above embodiments, the anti-shake in the first direction and the anti-shake in the second direction can also be combined with the translation of the lens 10 in the Z-axis direction to realize anti-shake, thereby improving the anti-shake effect of the entire camera module 100.

[0052] In order to more accurately control the movement of the lens 10 through the driving mechanism when implementing the anti-shake in the first direction, in some embodiments, the fixing portion 620 further includes a first magnetic sensor 624 provided on the side of the fixed bracket 621 facing away from the lens 10, for sensing the position change of the first moving magnetic member 613. The first magnetic sensor 624 can sense the position of the first moving magnetic member 613 in real time, so as to accurately control the driving mechanism through the control unit of the electronic device, and further accurately control the movement of the lens 10.

[0053] In addition, in order to more accurately control the movement of the lens 10 through the driving mechanism when implementing anti-shake in the second direction, the moving part 610 further includes a second magnetic sensor 615 disposed on the first flexible printed circuit board 6122 for sensing the position of the second fixed magnetic unit 623. The second magnetic sensor 615 can sense the position of the second fixed magnetic unit 623 in real time, so as to accurately control the driving mechanism through the control unit of the electronic device, and then accurately control the movement of the lens 10.

[0054] In a specific solution, as Figure 2 shown, the first fixed magnetic unit 622 is an electromagnetic coil and surrounds the second magnetic sensor 624, saving the installation space on the side of the fixed bracket 621 facing away from the lens 10. The second moving magnetic member 614 is an electromagnetic coil and surrounds the second magnetic sensor 615, saving the installation space on the first rigid-flex board 611. Both the first magnetic sensor 624 and the second magnetic sensor 615 are Hall sensors.

[0055] In the above embodiment, the first anti-shake mechanism drives the photosensitive element 20 to move in an electromagnetic driving manner, thereby realizing anti-shake in the first direction and the second direction. The mechanical structure of the electromagnetic driving manner is simple, which is beneficial to the miniaturization of the camera module 100.

[0056] In addition, the first anti-shake mechanism can also adopt other ways to drive the photosensitive element to move. For example, the shape memory alloy technology, which is deformed by being heated when powered on, and drives the photosensitive element 20 to move through the deformation. Specifically, the first anti-shake mechanism can include a first-direction anti-shake structure and a second-direction anti-shake structure, where the first-direction anti-shake structure is a shape memory alloy structure for driving the photosensitive element 20 to rotate to realize anti-shake in the first direction; the second-direction anti-shake structure is also a shape memory alloy structure for driving the first-direction anti-shake structure together with the photosensitive element 20 to translate along the X-axis direction to realize anti-shake in the second direction.

[0057] For another example, the first anti-shake mechanism can adopt a microelectromechanical system. Similar to the shape memory alloy solution, by setting a first-direction anti-shake structure and a second-direction anti-shake structure, anti-shake in the first direction and the second direction can be realized respectively.

[0058] The second anti-shake mechanism is used to realize anti-shake in the third direction by driving the reflecting prism 30 to rotate. There are also various implementation methods for the third-direction anti-shake structure of the second anti-shake mechanism.

[0059] For example, as Figure 2As shown, in one embodiment, the third-direction anti-shake structure includes a rotating shaft 710, a first magnetic element 720, a second magnetic element 730, and a second flexible-rigid combination board 740. The rotating shaft 710 is supported by the housing 50. The first magnetic element 730 is directly or fixedly connected to the reflecting prism 30 through an intermediate element. The second flexible-rigid combination board 740 includes a second rigid circuit board 741 fixed within the housing 50. The second magnetic element 730 is disposed on the second rigid circuit board 741. At least one of the second magnetic element 720 and the second magnetic element 730 is an electromagnetic unit. Through the cooperation of the first magnetic element 720 and the second magnetic element 730, the reflecting prism 30 is driven to rotate within a second plane, so that the incident light surface 310 of the reflecting prism 30 (please refer to Figure 1 )changes its position in the Y-axis direction, thereby achieving third-direction anti-shake. The electromagnetic unit is a unit that generates magnetic force after being energized, such as an electromagnetic coil. Among them, in a specific solution, the first magnetic element 720 is a magnet, and the second magnetic element 730 is an electromagnetic coil, and their positions correspond to each other. In other embodiments, the settings of the first magnetic element 720 and the second magnetic element 730 can also be: the first magnetic element 720 is an electromagnetic coil, and the second magnetic element 730 is a magnet; or both the first magnetic element 720 and the second magnetic element 730 are electromagnetic coils.

[0060] In the above embodiment, the reflecting prism 30 is rotated by an electromagnetic driving method to achieve anti-shake in the Y-axis direction. The reflecting prism 30 does not need to have a large translation distance in the Y-axis direction, nor does it need to be provided with a translation mechanism with a large size in the Y-axis direction. Therefore, the Y-axis anti-shake function is achieved and it is beneficial to realize the thinning of the camera module. In other embodiments, the shape memory alloy technology, stepping motor, piezoelectric motor, etc. can also be used to drive the reflecting prism 30, as long as the reflecting prism 30 can be rotated.

[0061] In addition, when implementing anti-shake in the Y-axis direction, it can also be combined with the translation of the lens 10 in the Z-axis to achieve anti-shake, thereby improving the anti-shake effect of the entire camera module 100. In order to more accurately control the movement of the lens 10 through the driving mechanism when implementing anti-shake in the Y-axis direction, the second anti-shake mechanism further includes a third magnetic sensor 750 disposed on the second rigid circuit board 741, which is used to sense the position change of the first magnetic element 720, and then accurately control the driving mechanism through the control unit of the electronic device, and then accurately control the movement of the lens 10.

[0062] In a specific solution, the first magnetic element 720 is a magnet, the second magnetic element 730 is an electromagnetic coil, and the third magnetic sensor 750 is arranged within the space enclosed by the electromagnetic coil to save installation space. The third magnetic sensor 750 is a Hall sensor. The second rigid-flex printed circuit board 740 further includes a second flexible printed circuit board 742 connected to the second rigid circuit board 741, and the second flexible printed circuit board 742 extends out of the housing 50 to be electrically connected to the main control board within the electronic device.

[0063] As Figure 2 shown, in order to more precisely control the movement of the lens 10, the camera module 100 further includes a lens magnetic member 120 and a fourth magnetic sensor 130. The lens magnetic member 120 is fixedly connected to the lens 10, and the fourth magnetic sensor 130 is arranged on the second rigid circuit board 741. The fourth magnetic sensor 130 can sense the position change of the lens magnetic member 120 in real time, so as to precisely control the driving mechanism and achieve rapid focusing of the camera module 100 in the Z-axis direction. The fourth magnetic sensor 130 is specifically a Hall sensor.

[0064] The driving mechanism includes a motor 410 fixed in the housing 50 and having a driving end 411, and a force transmission member 420 connecting the driving end to the lens 10. The motor 410 can be different types of driving motors, such as a piezoelectric motor, a voice coil motor, a stepping motor, a ball motor, or a shape memory alloy motor, etc. The motor 410 drives the lens 10 to move in the Z-axis direction through the force transmission member 420 to achieve rapid zooming or focusing. In this embodiment, only one motor 410 can be provided, which can reduce the installation process and lower the production cost.

[0065] Furthermore, in order to avoid the possible shaking generated by one motor 410 during the driving process, a guiding mechanism 140 is further arranged in the accommodation cavity 510 of the housing 50 to assist the lens 10 to move along the optical axis direction and ensure the movement stability and good guiding property of the lens 10. The guiding mechanism 140 includes a guide rail 141 and a sliding member 142, wherein the guide rail 141 is fixed in the housing 10, and the sliding member 142 connects the force transmission member 420 to the lens 10. When the motor 410 works, the lens 10 moves along the Z-axis direction on the guide rail 141, moves smoothly without shaking, thereby achieving a better focusing effect and an imaging effect with good imaging quality and high picture clarity.

[0066] To improve the assembly efficiency of the camera module 100, in some embodiments, the camera module 100 further includes an internal frame 150 fixed to the inner wall of the housing 50, and the lens 10, the reflecting prism 30, and the driving mechanism are all disposed on the internal frame 150. In this way, the internal frame 150, the lens 10, the reflecting prism 30, the driving mechanism, etc. can be pre-assembled into a module, which improves the modularity of the camera module 100 and thus improves the assembly efficiency when assembling the camera module 100.

[0067] As Figure 2 shown, in some embodiments, the camera module 100 further includes a filter 160, and the filter 160 is disposed on the side of the fixed bracket 621 facing the lens to improve the shooting performance of the camera module 100.

[0068] In each embodiment of the camera module 100 of the present invention, the elastic reset member 630 is made of a material having elastic deformation ability. On the one hand, the elastic reset member 630 provides an elastic force for resetting the movable bracket 611; on the other hand, the elastic reset member 630 connects the movable bracket 611 to the fixed bracket 621, which is a supporting element of the movable bracket 611 in the housing 50, and no additional supporting element needs to be provided. Specifically, the elastic reset member 630 is a spring piece with good flexibility and deformation ability. In addition, an elastic reset member 630 is disposed at both ends of the movable bracket 611 and connected to the fixed bracket 620 to improve the stability of the support for the movable bracket 611.

[0069] An embodiment of the present invention further provides an electronic device, including the camera module 100 of any of the foregoing embodiments, where the electronic device may be a smart mobile terminal such as a mobile phone or a tablet.

[0070] In the electronic device of this embodiment, the camera module 100 realizes anti-shake in the first direction and the second direction by driving the photosensitive element 20 to move, and realizes anti-shake in the third direction by driving the reflecting prism 30 to move. Compared with the traditional technology that only sets anti-shake in two directions of the X-axis and Y-axis directions, the dimension of anti-shake is increased and the anti-shake function is increased. At the same time, the second-direction anti-shake is performed on the photosensitive element 20, and the lens 10 is only used to realize autofocus in the Z-axis direction. Therefore, the lens 10 avoids complex anti-shake design and large power consumption. Therefore, the size of the camera module 100 in the Y-axis direction can be reduced, which is beneficial to realizing thinness, and is beneficial to setting the lens 10 as a long-focus module with a longer focal length, so as to better meet the long-distance shooting requirements.

[0071] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0072] The above embodiments merely illustrate several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A camera module, characterized in that, It includes a lens, photosensitive elements located on opposite sides of the lens, and a reflecting prism. The reflecting prism has a light incident surface. The camera module further includes: A first anti-shake mechanism, including a first-direction anti-shake structure and a second-direction anti-shake structure. The first-direction anti-shake structure is used to drive the photosensitive element to rotate around a first axis, and the second-direction anti-shake structure is used to drive the photosensitive element to translate along a second axis perpendicular to the first axis; The first anti-shake mechanism includes: A moving part, including a movable bracket, a first rigid-flex board, a first moving magnetic part and a second moving magnetic part. The first rigid-flex board includes a first rigid circuit board and a first flexible circuit board connected to the first rigid circuit board. The first flexible circuit board is connected to the movable bracket. The photosensitive element and the first moving magnetic part are both arranged on the first rigid circuit board, and the second moving magnetic part is arranged on the first flexible circuit board; A fixed part, including a fixed bracket fixed in the housing, a first fixed magnetic unit and a second fixed magnetic unit arranged on the fixed bracket. The fixed bracket is connected to the movable bracket through an elastic reset member. Through the cooperation of the first moving magnetic part and the first fixed magnetic unit, the photosensitive element is driven to rotate around the first axis. Through the cooperation of the second moving magnetic part and the second fixed magnetic unit, the photosensitive element is driven to translate along the second axis; The first moving magnetic part is a magnet, and the first fixed magnetic unit is an electromagnetic coil; the second moving magnetic part is an electromagnetic coil, and the second fixed magnetic unit is a magnet; A second anti-shake mechanism, including a third-direction anti-shake mechanism. The third-direction anti-shake mechanism is used to drive the reflecting prism to rotate around a rotation axis parallel to the second axis, and the axis of the rotation axis is parallel to the light incident surface.

2. The camera module according to claim 1, wherein At least one of the first moving magnetic part and the first fixed magnetic unit is an electromagnetic unit, and at least one of the second moving magnetic part and the second fixed magnetic unit is an electromagnetic unit.

3. The camera module according to claim 1, wherein The fixed part further includes a first magnetic sensor arranged on the side of the fixed bracket facing away from the lens to sense the position change of the first moving magnetic part; the moving part further includes a second magnetic sensor arranged on the first flexible circuit board to sense the position of the second fixed magnetic unit.

4. The camera module according to claim 3, wherein The first fixed magnetic unit is an electromagnetic coil and surrounds the first magnetic sensor; the second moving magnetic part is an electromagnetic coil and surrounds the second magnetic sensor.

5. The camera module according to claim 1, wherein The second anti-shake mechanism includes the rotating shaft, a first magnetic element, a second magnetic element, and a second flexible-rigid combination board. The rotating shaft is supported within the housing of the camera module. The first magnetic element is fixedly connected to the reflecting prism. The second flexible-rigid combination board includes a second rigid circuit board disposed within the housing, and the second magnetic element is disposed on the second rigid circuit board. At least one of the first magnetic element and the second magnetic element is an electromagnetic unit. Through the cooperation of the first magnetic element and the second magnetic element, the reflecting prism is driven to rotate around the rotating shaft.

6. The camera module according to claim 5, wherein The second anti-shake mechanism further includes a third magnetic sensor disposed on the second rigid circuit board for sensing the position change of the first magnetic element.

7. The camera module according to claim 5, wherein The camera module further includes a lens magnetic member and a fourth magnetic sensor. The lens magnetic member is fixedly connected to the lens, and the fourth magnetic sensor is disposed on the second rigid circuit board. The fourth magnetic sensor is used for sensing the position change of the lens magnetic member.

8. The camera module according to claim 1, wherein The camera module further includes a driving mechanism for driving the lens to translate along the first axis. The driving mechanism includes a motor having a driving end fixed within the housing of the camera module and a force transmission member connecting the driving end to the lens.

9. The camera module according to claim 8, wherein, The camera module further includes a guiding mechanism disposed within the housing for assisting the lens to translate along the first axis. The guiding mechanism includes a guide rail and a sliding member. The guide rail is fixed within the housing, and the sliding member connects the force transmission member to the lens.

10. The camera module according to claim 1, wherein, The camera module further includes an internal frame fixed to the inner wall of the housing of the camera module. The lens, the reflecting prism, and the driving mechanism are all disposed within the internal frame.

11. The camera module according to claim 1, wherein The elastic reset member is a spring piece.

12. The camera module according to claim 1, wherein, The axial direction of the first axis is consistent with the direction of the optical axis of the lens, and the light incident surface is parallel to the first axis.

13. An electronic device, characterized in that, Including the camera module according to any one of claims 1-12.

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