Patent Description:
With development of technologies, electronic devices such as cell phones play an important role in people's production and life, and the electronic devices are usually equipped with cameras to facilitate shooting by users. When shooting handheld, users are likely to shake, resulting in blurry, ghosting, or other problems of images or videos shot. In the related art, the camera module is typically equipped with an optical anti-shake assembly to improve the definition of the images and videos shot. However, such optical anti-shake assembly can typically correct only image smear caused by camera movement in three dimensions XYZ, but cannot resolve image smearing caused by rotation of the camera around its own optical axis.

Document <CIT>discloses a camera module including an optical element and a plurality of actuator elements, each having an ion conductive polymer film and electrodes arranged on both sides of the film to bend the electrodes in a thickness direction by applying a voltage between the electrodes; the module further comprises an optical element position detecting section which is independent from the driver voltage section.

Document <CIT> discloses a camera assembly comprising a lens and an actuating part involving shape memory alloy, SMA, wires to control the position of a movable reflective prism; the camera module determines a rotation angle of the movable reflective prism based on displacement of SMA wires.

This application discloses an electronic device and a camera module thereof, which can resolve the current problem of image smearing caused by the rotation of the camera around its own optical axis.

To resolve the foregoing problem, embodiments of this application are implemented as follows:
According to a first aspect, an embodiment of this application discloses a camera module including a lens assembly, a module bracket, a first limit member, a first deformable member, and a second deformable member, where the lens assembly is rotatably connected to the module bracket, the first limit member is fastened to the lens assembly or the module bracket, the first deformable member and the second deformable member are both electro-deformable members, the first deformable member is disposed on one side of the first limit member, and the second deformable member is disposed on the other side of the first limit member.

In a case that the lens assembly rotates with respect to the module bracket along a first direction, the first deformable member can deform, so that a first rotation angle of the lens assembly with respect to the module bracket is measured; and in a case that the lens assembly rotates with respect to the module bracket along a second direction, the second deformable member can deform, so that a second rotation angle of the lens assembly with respect to the module bracket is measured, the second direction being opposite to the first direction.

According to a second aspect, an embodiment of this application discloses an electronic device including the foregoing camera module.

This application discloses a camera module including a lens assembly, a module bracket, a first limit member, a first deformable member, and a second deformable member. The first limit member is relatively fastened to the lens assembly or the module bracket. The first deformable member and the second deformable member are both electro-deformable members and are respectively disposed on two opposite sides of the first limit member. When the camera module shakes and rotates around its own optical axis, the lens assembly and the module bracket rotate with respect to each other around the optical axis of the lens assembly, so that the first limit member presses the first deformable member (or the second deformable member) and the first deformable member (or the second deformable member) deforms. Based on the deformation amount of the first deformable member (or the second deformable member), a relative rotation angle between the lens assembly and the module bracket can be obtained. Based on the relative rotation angle, a preset voltage can be applied to the first deformable member (or the second deformable member), allowing the first deformable member (or the second deformable member) to drive the lens assembly and the module bracket to rotate reversely, thus restoring positions of the lens assembly and the module bracket.

In summary, during the operation of the camera module, when the lens assembly rotates with respect to the shot region because the camera module shakes, the camera module can measure the rotation angle and apply a corresponding voltage to drive the lens assembly to move reversely, compensating for the smearing generated due to rotation of the camera module. This keeps a relative position (or a relative angle) of the lens assembly with respect to the shot region unchanged, avoiding image smearing caused by the rotation of the camera module, thus improving the imaging quality of camera.

The accompanying drawings described herein are intended for better understanding of this application, and constitute a part of this application. Exemplary embodiments and descriptions thereof in this application are intended to interpret this application and do not constitute any improper limitation on this application. In the accompanying drawings:.

Reference numerals in the accompanying drawings are described as follows:.

To make the objectives, technical solutions, and advantages of this application clearer, the following clearly and completely describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are merely some but not all of the embodiments of this application.

The technical solutions disclosed in the embodiments of this application are described in detail below with reference to the accompanying drawings.

As shown in <FIG> and <FIG>, this application discloses a camera module including a lens assembly <NUM>, a module bracket (not shown in the figure), a first limit member <NUM>, a first deformable member <NUM>, and a second deformable member <NUM>. Certainly, the camera module may further be provided with other components such as a photosensitive chip <NUM>. The photosensitive chip <NUM> may be disposed on a side of the lens assembly <NUM> back away from a light incident side.

The lens assembly <NUM> may include at least one lens, and light outside the camera module is incident to the camera module through the lens assembly <NUM>. The module bracket provides a mounting base for the lens module, and the module bracket can provide some protection for the lens assembly <NUM>. The module bracket may be made of metal or plastic in various shapes and specific structural forms. For example, the module bracket may be of a cylindrical structure. The module bracket surrounds outside the lens assembly <NUM>, with the bottom and at least part of a side of the lens assembly <NUM> surrounded by the module bracket, thus improving the service life of the camera module.

The lens assembly <NUM> is rotatably connected to the module bracket. To be specific, a rotation shaft may be disposed between the lens assembly <NUM> and the module bracket, the rotation shaft extending along the optical axis of the lens assembly <NUM>. This can ensure that the lens assembly <NUM> can rotate around the optical axis of the lens assembly <NUM> with respect to the module bracket. Certainly, the lens assembly <NUM> may be connected to the module bracket through other connection members, thus forming a rotational connection relationship between the lens assembly <NUM> and the module bracket, which, for brevity, is not listed one by one herein.

The first limit member <NUM> may be of a plate structure or a block structure. This is not limited in this specification. Certainly, the first limit member <NUM> should have a structural strength as required, thus ensuring that the first limit member <NUM> can provide a limiting function for the first deformable member <NUM> and the second deformable member <NUM>. Specifically, the first limit member <NUM> may be made of materials such as plastic or metal. In addition, the first limit member <NUM> may be fastened to the lens assembly <NUM> or module bracket by means of insertion, bonding, connection by a connection member, and the like.

In order to ensure that the first limit member <NUM> can provide a normal limit function, the first limit member <NUM> needs to be disposed between the lens assembly <NUM> and the module bracket. For example, the first limit member <NUM> may be fastened to the lens assembly <NUM>, and specifically, the first limit member <NUM> may be fastened to a side of the lens assembly <NUM> back away from the light indecent side, that is, between the bottom of the lens assembly <NUM> and the module bracket. Alternatively, the first limit member <NUM> may be fastened outside the side wall of the lens assembly <NUM> and the module bracket surrounds outside the side wall of the lens assembly <NUM>. This can also ensure that the first limit member <NUM> is located between the lens assembly <NUM> and the module bracket.

The first deformable member <NUM> and the second deformable member <NUM> may be of the same structure or different structures. Optionally, both may be of an elongated or curved structure. The first deformable member <NUM> and the second deformable member <NUM> are both electro-deformable members. That is, the first deformable member <NUM> and the second deformable member <NUM> are both made of the electro-deformable material. The electro-deformable material may be specifically piezoelectric material, ion exchange polymer metal material, and the like. Such materials can deform when energized. Correspondingly, when the electro-deformable material deforms, a voltage can be generated. In this application, monitoring on the relative rotation between the lens assembly <NUM> and the module bracket is implemented according to the principle of such material, and the material is used to drive the lens assembly <NUM> to rotate with respect to the module bracket, thus restoring the lens assembly <NUM> and the module bracket to an initial state for anti-shaking.

The first deformable member <NUM> is disposed on one side of the first limit member <NUM> and the second deformable member <NUM> is disposed on the other side of the first limit member <NUM>. In other words, the first deformable member <NUM> and the second deformable member <NUM> are respectively disposed on opposite sides of the first limit member <NUM>. Thereby, when the lens assembly <NUM> rotates with respect to the module bracket, the first limit member <NUM> can rotate with respect to the module bracket (or the lens assembly <NUM>) such that the first limit member <NUM> can come in contact with and press the first deformable member <NUM> or the second deformable member <NUM>.

When the lens assembly <NUM> rotates with respect to the module bracket along a first direction, the first deformable member <NUM> can deform, so that a first rotation angle of the lens assembly <NUM> with respect to the module bracket is measured; and when the lens assembly <NUM> rotates with respect to the module bracket along a second direction, the second deformable member <NUM> can deform, so that a second rotation angle of the lens assembly <NUM> with respect to the module bracket is measured. The second direction is opposite to the first direction. Specifically, the first deformable member <NUM> and the second deformable member <NUM> can be used for measuring rotation angles of the lens assembly <NUM> with respect to the module bracket along different directions, and the relative rotation direction between the lens assembly <NUM> and the module bracket can be determined based on a voltage source.

As described above, the first limit member <NUM> may be fastened to the lens assembly <NUM> or the module bracket. For example, the first limit member <NUM> may be fastened to the lens assembly <NUM>, and optionally, both the first deformable member <NUM> and the second deformable member <NUM> may be mounted on the module bracket. In the foregoing embodiment, when the lens assembly <NUM> and the module bracket rotate with respect to each other along the first direction, the first limit member <NUM> and the first deformable member <NUM> can also move with respect to each other. During the continuous rotation of the first limit member <NUM> and the first deformable member <NUM> after contact, the first limit member <NUM> can apply pressure to the first deformable member <NUM>, so that the first deformable member <NUM> deforms and further generates a voltage. Based on the voltage generated by the first deformable member <NUM>, a deformation amount of the first deformable member <NUM> can be obtained, so as to further obtain a relative movement angle between the first limit member <NUM> and the first deformable member <NUM>, that is, the relative rotation angle between the lens assembly <NUM> and the module bracket along the first direction.

Correspondingly, when the lens assembly <NUM> and the module bracket rotate with respect to each other along the second direction, the first limit member <NUM> can come in contact with and press the second deformable member <NUM>. Based on a voltage generated by the second deformable member <NUM>, a relative rotation angle between the lens assembly <NUM> and the module bracket in the second direction can also be obtained. It should be noted that according to parameters of, for example, shape and material of the first deformable member <NUM> (or the second deformable member <NUM>) as well as a specific value of the voltage generated by the first deformable member <NUM> (or the second deformable member <NUM>), the deformation amount of the first deformable member <NUM> (or the second deformable member <NUM>) can be obtained. Thereby, based on the deformation amount with reference to initial positions of the first limit member <NUM> and the first deformable member <NUM> (or the second deformable member <NUM>), the relative rotation angle between the first limit member <NUM> and the first deformable member <NUM> (or the second deformable member <NUM>) can be obtained, thus obtaining the relative rotation angle between the lens assembly <NUM> and the module bracket along the first direction (or the second direction).

In addition, based on the measured relative rotation angle between the lens assembly <NUM> and the module bracket along the first direction (or the second direction), a preset voltage can be applied to the first deformable member <NUM> (or the second deformable member <NUM>), such that the first deformable member <NUM> (or the second deformable member <NUM>) produces a corresponding amount of deformation under the action of the voltage. In this way, the first deformable member <NUM> deforms itself to drive the first limit member <NUM>, so as to drive the lens assembly <NUM> and the module bracket to rotate along the second direction (or the first direction), so that the lens assembly <NUM> and the module bracket are restored to the initial state for anti-shaking.

Specifically, the camera module or the electronic device containing such camera module may be provided with a voltage processing assembly <NUM>. As shown in <FIG>, the voltage processing assembly may be connected to a power supply, and the voltage processing assembly <NUM> may specifically include a controller, a voltage tester, and a voltage outputter. As shown in <FIG>, two opposite ends of each of the first deformable member <NUM> and the second deformable member <NUM> can be both electrically connected to the voltage processing assembly <NUM> through connection structures such as wires. When the first deformable member <NUM> (or the second deformable member <NUM>) is pressed, the voltage generated by the first deformable member <NUM> can be transmitted to the voltage processing assembly <NUM> through the wire. The voltage tester can test the generated voltage, so as to determine the deformation amount of the first deformable member <NUM> (or the second deformable member <NUM>) according to a preset condition. The controller can determine a relative rotation angle between the lens assembly <NUM> and the module bracket based on the deformation amount, thus controlling, based on the rotation angle, the voltage outputter to output a corresponding voltage. This allows the first deformable member <NUM> (or the second deformable member <NUM>) to actively deform, driving the lens assembly <NUM> and the module bracket to rotate with respect to each other for restoring the position.

This application discloses a camera module including a lens assembly <NUM>, a module bracket, a first limit member <NUM>, a first deformable member <NUM>, and a second deformable member <NUM>. The first limit member <NUM> is relatively fastened to the lens assembly <NUM> or the module bracket. The first deformable member <NUM> and the second deformable member <NUM> are both electro-deformable members and are respectively disposed on two opposite sides of the first limit member <NUM>. When the camera module shakes and rotates around its own optical axis, the lens assembly <NUM> and the module bracket rotate with respect to each other around the optical axis of the lens assembly <NUM>. This makes the first limit member <NUM> press the first deformable member <NUM> (or the second deformable member <NUM>), so as to deform the first deformable member <NUM> (or the second deformable member <NUM>). Based on the deformation amount of the first deformable member <NUM> (or the second deformable member <NUM>), a relative rotation angle between the lens assembly <NUM> and the module bracket can be obtained. Based on the relative rotation angle, a preset voltage can be applied to the first deformable member <NUM> (or the second deformable member <NUM>), allowing the first deformable member <NUM> (or the second deformable member <NUM>) to drive the lens assembly <NUM> and the module bracket to rotate reversely, thus restoring positions of the lens assembly <NUM> and the module bracket.

In summary, during the operation of the camera module, when the lens assembly <NUM> rotates with respect to the shot region because the camera module shakes, the camera module can measure the rotation angle and apply a corresponding voltage to drive the lens assembly <NUM> to move reversely, compensating for the smearing generated due to rotation of the camera module. This keeps a relative position (or a relative angle) of the lens assembly <NUM> with respect to the shot region unchanged, avoiding image smearing caused by the rotation of the camera module, thus improving the imaging quality of camera.

As described above, in a case that the first limit member <NUM> is fastened to the lens assembly <NUM>, the first deformable member <NUM> and the second deformable member <NUM> can be both fastened to the module bracket, ensuring that the first deformable member <NUM> and the second deformable member <NUM> can normally provide functions of angle measurement and driving for position restoration. In order to improve the adjustment accuracy of the camera module, an end of the first deformable member <NUM> back away from the first limit member <NUM> can be fastened to the module bracket, and correspondingly, an end of the second deformable member <NUM> back away from the first limit member <NUM> can be fastened to the module bracket. In this case, the entire structures of the first deformable member <NUM> and the second deformable member can deform so as to implement angle measurement, and the entire structures of both can deform when energized to implement position restoration through driving. This can not only maximize the utilization of the first deformable member <NUM> and the second deformable member <NUM> but also improve the measurement and adjustment accuracy of the lens assembly <NUM> to some extent, improving the anti-shaking effect.

In another embodiment of this application, optionally, as shown in <FIG> and <FIG>, the camera module further includes a second limit member <NUM> and a third limit member <NUM>, the second limit member <NUM> being disposed on one side of the first limit member <NUM> and the third limit member <NUM> being provided on the other side of the first limit member <NUM>. That is, the second limit member <NUM> and the third limit member <NUM> are respectively disposed on opposite sides of the first limit member <NUM>. Specifically, the second limit member <NUM> and the third limit member <NUM> can be similar in structure to the first limit member <NUM> and can be of plate or block-shaped structures that can provide a limiting effect. Moreover, the second limit member <NUM> and the third limit member <NUM> can alternatively be made of hard materials such as plastic or metal, thus ensuring that the second limit member <NUM> and the third limit member <NUM> both can provide a stable and reliable limiting effect.

Of the lens assembly <NUM> and the module bracket, one is fixedly connected to the first limit member <NUM> and the other is connected to the second limit member <NUM> and the third limit member <NUM>, the first deformable member <NUM> being sandwiched between the second limit member <NUM> and the first limit member <NUM>, and the second deformable member <NUM> being sandwiched between the third limit member <NUM> and the first limit member <NUM>. In other words, as shown in <FIG>, the second limit member <NUM>, the first deformable member <NUM>, the first limit member <NUM>, the second deformable member <NUM>, and the third limit member <NUM> are arranged sequentially.

In the above technical solution, when the lens assembly <NUM> and the module bracket rotate with respect to each other along the first direction, the first limit member <NUM> and the second limit member <NUM> can rotate with respect to each other, specifically, getting closer to each other to press the first deformable member <NUM> located therebetween. Therefore, a relative rotation angle between the lens assembly <NUM> and the module bracket along the first direction can be obtained based on the deformation amount of the first deformable member <NUM>. Then, based on the measured angle, a preset voltage can be applied to the first deformable member <NUM>, allowing the first deformable member <NUM> to actively deform, thus driving the first limit member <NUM> and the second limit member <NUM> to move with respect to each other. This makes the lens assembly <NUM> and the module bracket rotate with respect to each other along the second direction, thus restoring the position of the lens assembly <NUM> for anti-shaking. Certainly, in the above process, the third limit member <NUM> can also rotate with respect to the first limit member <NUM>. However, the relative rotation process between the two does not involve the angle measurement and driving for position restoration, which, for brevity, is not described herein.

Correspondingly, with the lens assembly <NUM> and the module bracket rotating with respect to each other along the second direction, the first limit member <NUM> and the third limit member <NUM> rotate with respect to each other, specifically, getting closer to each other to press the second deformable member <NUM> located therebetween. The measurement process and driving process of the second deformable member <NUM> are similar to those of the first deformable member <NUM>, where the second deformable member <NUM> can drive the lens assembly <NUM> and the module bracket to rotate for position restoration along the first direction, thus restoring the lens assembly <NUM> and the module bracket to their initial positions.

In a case that the positions of the first deformable member <NUM> and the second deformable member <NUM> are limited by the second limit member <NUM> and the third limit member <NUM>, the first deformable member <NUM> and the second deformable member <NUM> can be neither connected to the lens assembly <NUM> and the module bracket, and positions of the first deformable member <NUM> and the second deformable member <NUM> are limited only by the first limit member <NUM>, the second limit member <NUM>, and the third limit member <NUM>, thus preventing the adverse impact on the measurement accuracy and deformation accuracy of the first deformable member <NUM> and the second deformable member <NUM> in the interaction process of "deformation-electricity generation" due to the limitation of the connection relationship between the two deformable members. This further improves the measurement accuracy of the rotation angle of the lens assembly <NUM> and can also improve the driving accuracy of the lens assembly <NUM>. In addition, in the above embodiment, the first deformable member <NUM> and the second deformable member <NUM> are less difficult to mount.

Optionally, a first spacing between a contact point between the first deformable member <NUM> and the first limit member <NUM> and an optical axis of the lens assembly <NUM> is equal to a second spacing between a contact point between the first deformable member <NUM> and the second limit member <NUM> and the optical axis of the lens assembly <NUM>. In other words, the distance from the action point between the first deformable member <NUM> and the first limit member <NUM> to the center of the lens assembly <NUM> is equal to the distance from the action point of the first deformable member <NUM> and the second limit member <NUM> to the center of the lens assembly <NUM>, thus allowing for the same interaction effect of the first limit member <NUM> and the second limit member <NUM> on the first deformable member <NUM> when the first deformable member <NUM> is pressed or energized to actively deform.

Correspondingly, a third spacing from a contact point between the second deformable member <NUM> and the first limit member <NUM> to the optical axis of the lens assembly <NUM> is equal to a fourth spacing from a contact point between the second deformable member <NUM> and the third limit member <NUM> to the optical axis of the lens assembly <NUM>, allowing for the substantially same interaction effect of the first limit member <NUM> and the third limit member <NUM> on the second deformable member <NUM>.

Specifically, as described above, the first deformable member <NUM> may be a bar-shaped structure member or the like. The extension direction of the first deformable member <NUM> is perpendicular to a connection line between the midpoint of the first deformable member <NUM> and the optical axis of the lens assembly <NUM>, such that the spacings between opposite ends of the first deformable member <NUM> and the optical axis of the lens assembly <NUM> are equal or substantially equal.

Both the first limit member <NUM> and the second limit member <NUM> may be in point or surface contact with the first deformable member <NUM>. In the case of both the first limit member <NUM> and the second limit member <NUM> being in surface contact with the first deformable member <NUM>, the above contact points may be contact points corresponding to each other. For example, the contact points corresponding to each other can include a first contact point between the center of one end face of the first deformable member <NUM> and the first limit member <NUM> and a second contact point between the center of the other end face of the first deformable member <NUM> and the second limit member <NUM>. Because the structure of the second deformable member <NUM> is similar to that of the first deformable member <NUM>, the two can be provided in the substantially same way and details are not repeated herein.

Further, the first limit member <NUM> and the second limit member <NUM> both have a limit plane. Specifically, the first limit member <NUM> and the second limit member <NUM> both cooperate with the first deformable member <NUM> through the plane structure. This can improve the limiting effect on the first deformable member <NUM> to some extent. Optionally, the intersection line of the two limit planes is the straight line on which the optical axis of the lens assembly <NUM> is located. In other words, the limit plane of the first limit member <NUM> and the limit plane of the second limit member <NUM> intersect and both cross the optical axis of the lens assembly <NUM> or the straight line on which the optical axis of the lens assembly <NUM> is located is located on the limit planes of both the first limit member <NUM> and the second limit member <NUM>.

When the first deformable member <NUM> is energized, the first deformable member <NUM> deforms and applies a first driving force and a second driving force to the first limit member <NUM> and the second limit member <NUM> respectively. In the foregoing technical solution, the direction of the first driving force is basically perpendicular to the limit plane of the first limit member <NUM>, and the direction of the second driving force is substantially perpendicular to the limit plane of the second limit member <NUM>, such that the first driving force and the second driving force do not have other action effects, but only act on the first limit member <NUM> and the second limit member <NUM>, thus allowing for relative rotation between the first limit member <NUM> and the second limit member <NUM>. This can reduce the waste of driving force, improve the driving efficiency, and reduce power consumption.

In addition, in the case of using the foregoing technical solution, the whole force of the relative rotation between the first limit member <NUM> and the second limit member <NUM> can act substantially on the first deformable member <NUM>, compressing and deforming the first deformable member <NUM>, allowing for a more accurate value of the measured rotation angle between the lens assembly <NUM> and the module bracket through the first deformable member <NUM>.

Correspondingly, the first limit member <NUM> and the third limit member <NUM> both having a limit plane and the intersection line of the two limit planes being the straight line on which the optical axis of the lens assembly <NUM> is located can improve the driving efficiency of the second deformable member <NUM>, reduce power consumption, and improve the measurement accuracy of the relative rotation angle between the lens assembly <NUM> and the module bracket through the second deformable member <NUM>.

Optionally, both the first deformable member <NUM> and the second deformable member <NUM> can be curved structure members, further enhancing the action effects of the two deformable members on the first limit member <NUM>. In another embodiment of this application, both the first deformable member <NUM> and the second deformable member <NUM> can be spherical-structured components. This can enable the first deformable member <NUM> and the second deformable member <NUM> to meet the requirements of the above embodiment and reduce the processing and mounting difficulties of the first deformable member <NUM> and the second deformable member <NUM>.

As described above, the first limit member <NUM> can be fastened to the lens module or the module bracket. Optionally, the first limit member <NUM> is fixed to the lens assembly <NUM>, reducing parts attached to the lens assembly <NUM> and the rotation difficulty of the lens assembly <NUM>.

As described above, the first limit member <NUM> may be provided at the bottom of the lens assembly <NUM>, and in another embodiment of this application, as shown in <FIG>, the first limit member <NUM> is provided outside the side wall of the lens assembly <NUM>. In this case, the lens assembly <NUM> rotates a little, allowing the first limit member <NUM> to move with the lens assembly <NUM>, thus implementing higher sensing sensitivity of the first limit member <NUM> and improving the anti-shake performance of the camera module. The side wall of the lens assembly <NUM> surrounds the optical axis of the lens assembly <NUM>, and correspondingly, the bottom of the lens assembly <NUM> is a structure perpendicular to the optical axis of the lens assembly <NUM>.

Based on the foregoing embodiment, in the case that the camera module is provided with the second limit member <NUM> and the third limit member <NUM>, the second limit member <NUM> and the third limit member <NUM> may also be provided outside the side wall of the lens assembly <NUM>, and in the case that the first limit member <NUM> is connected to the lens assembly <NUM>, the second limit member <NUM> and the third limit member <NUM> can both be fixedly connected to the module bracket.

In order to ensure that the first deformable member <NUM> does not move between the first limit member <NUM> and the second limit member <NUM> in a direction away from the lens assembly <NUM>, that is, to prevent the first deformable member <NUM> from moving away from the lens assembly <NUM> along the axial direction of the lens assembly <NUM>, a side of the first limit member <NUM> and a side the second limit member <NUM> that are back away from the lens assembly <NUM> can approach each other, thereby holding the first deformable member <NUM> among the first limit member <NUM>, the second limit member <NUM>, and the lens assembly <NUM>.

However, as described above, in order to improve the performance of the camera module, the limit planes of the first limit member <NUM> and the second limit member <NUM> can cross the straight line on which the optical axis of the lens assembly <NUM> is located. In such case, a spacing between parts of the first limit member <NUM> and the second limit member <NUM> closer to the lens assembly <NUM> is smaller, and a spacing between parts of the two limit members further away from the lens assembly <NUM> is larger, allowing the first limit member <NUM> and the second limit member <NUM> to form a flaring-structured member. This makes it impossible for the first limit member <NUM> and the second limit member <NUM> to provide a limiting function for the first deformable member <NUM>. Accordingly, the second deformable member <NUM> also has the problem that its position cannot be limited by the first limit member <NUM> and the third limit member <NUM>.

Based on this, optionally, as shown in <FIG> and <FIG>, the camera module may further include an elastic limit member <NUM>. The elastic limit member <NUM> is connected to a side of the second limit member <NUM> and a side of the third limit member <NUM> that are back away from the lens assembly <NUM>, and the first deformable member <NUM> and the second deformable member <NUM> are both limited between the elastic limit member <NUM> and a side wall of the lens assembly <NUM>. In this case, the positions of the first deformable member <NUM> and the second deformable member <NUM> can be limited using the elastic limit member <NUM>, preventing the first deformable member <NUM> and the second deformable member <NUM> from moving in a direction away from the lens assembly <NUM>, thus being able to provide normal functions of angle measurement and driving for position restoration.

The elastic limit member <NUM> may be specifically made of a material with certain elasticity such that when the first deformable member <NUM> is pressed by the first limit member <NUM> and the second limit member <NUM>, the elastic limit member <NUM> deforms elastically, providing a space for the first deformable member <NUM>, thus ensuring that the first deformable member <NUM> can deform normally. Correspondingly, for the deformation of the second deformable member <NUM> caused by pressure, the second deformable member <NUM> can also press the elastic limit member <NUM> so that the second deformable member <NUM> can deform normally.

Certainly, in order to ensure that both the first deformable member <NUM> and the second deformable member <NUM> can stably fit the lens assembly <NUM>, in addition to the provision of the elastic limit member <NUM> on the side of the first limit member <NUM> back away from the lens assembly <NUM>, as shown in <FIG> and <FIG>, limit structures <NUM> can be also respectively provided on the other two sides of the first limit member <NUM>. This allows the first deformable member <NUM> and the second deformable member <NUM> to be encapsulated and limited among the second limit member <NUM>, the elastic limit member <NUM>, the third limit member <NUM>, the lens assembly <NUM>, and the two limit structures <NUM>.

Optionally, the first limit member <NUM> is provided in plurality, the first deformable member <NUM> is provided on one side of each first limit member <NUM> and the second deformable member <NUM> is provided on the other side. In this case, when the lens assembly <NUM> rotates with respect to the module bracket along the first direction, the rotation angle can be measured using the plurality of first deformable members <NUM> together, thus further improving the angle measurement accuracy. In addition, the lens assembly <NUM> can be driven by the plurality of first deformable members <NUM> together to rotate with respect to the module bracket, improving the driving reliability. Correspondingly, when the lens assembly <NUM> rotates with respect to the module bracket along the second direction, the rotation angle can be measured using a plurality of second deformable members <NUM> together, thus improving the measurement and adjustment accuracy.

In a case that the first limit member <NUM>, the first deformable member <NUM>, and the second deformable member <NUM> are all provided in plurality, the second limit member <NUM> and the third limit member <NUM> can be also provided in plurality, and the plurality of second limit members <NUM> and the plurality of third limit members <NUM> fit the plurality of first limit members <NUM> in a one-to-one correspondence, further improving the adjustment accuracy of the camera module.

Optionally, the plurality of first limit members <NUM> are equally spaced apart around the optical axis of the lens assembly <NUM>. In this case, the various parts of the lens assembly <NUM> are subjected to a uniform driving force, preventing the lens assembly <NUM> from being stuck due to force deflection during the rotation of the lens assembly <NUM> with respect to the module bracket, thus improving the reliability of the camera module. Specifically, three, four, or more first limit members <NUM> may be provided, thus ensuring a reliable fitting relationship between the lens assembly <NUM> and the module bracket.

Based on the camera module disclosed in any one of the above embodiments, an embodiment of this application further provides an electronic device. The electronic device includes the camera module provided in any one of the above embodiments. Certainly, the electronic device further includes other devices such as a display module, a shell, and a battery, which, for brevity, is not described therein one by one.

The electronic device disclosed in the embodiment of this application may be a smart phone, a tablet computer, an e-book reader, or a wearable device. Certainly, the electronic device may alternatively be another device, which is not limited in the embodiments of this application.

The foregoing embodiments of this application focus on the differences between the embodiments. As long as the different features of improvement in the embodiments are not contradictory, they can be combined to form a more preferred embodiment. For brevity, details are not repeated here.

Claim 1:
A camera module, comprising a lens assembly (<NUM>), a module bracket, a first limit member (<NUM>), a first deformable member (<NUM>), and a second deformable member (<NUM>), wherein the lens assembly (<NUM>) is rotatably connected to the module bracket, the first limit member (<NUM>) is fastened to the lens assembly (<NUM>) or the module bracket, the first deformable member (<NUM>) and the second deformable member (<NUM>) are both electro-deformable members, the first deformable member (<NUM>) is disposed on one side of the first limit member (<NUM>), and the second deformable member (<NUM>) is disposed on the other side of the first limit member (<NUM>); and
in a case that the lens assembly (<NUM>) rotates with respect to the module bracket along a first direction, the first deformable member (<NUM>) deforms and generates a first voltage depending on a deformation amount of the first deformable member (<NUM>), so that a first rotation angle of the lens assembly (<NUM>) with respect to the module bracket is determined by measuring the first voltage; and in a case that the lens assembly (<NUM>) rotates with respect to the module bracket along a second direction, the second deformable member (<NUM>) deforms and generates a second voltage depending on a deformation amount of the second deformable member (<NUM>), so that a second rotation angle of the lens assembly (<NUM>) with respect to the module bracket is determined by measuring the second voltage, the second direction being opposite to the first direction.