Patent ID: 12206988

DETAILED DESCRIPTION

The following clearly describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some rather than all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

As shown inFIG.1, the present disclosure discloses an anti-shake mechanism. The anti-shake mechanism includes: a support plate1; a first printed circuit board2; a support column3fixedly installed on the first printed circuit board2, where an end of the support column3away from the first printed circuit board2contacts the support plate1; a tilt angle detection mechanism, configured to detect a tilt angle of the support plate1; an angle adjustment mechanism, where the angle adjustment mechanism is located between the support plate1and the first printed circuit board2, and is connected to the support plate1and the first printed circuit board2, respectively; and a driving apparatus connected to the tilt angle detection mechanism and the angle adjustment mechanism, respectively, where the driving apparatus receives a tilt angle collected by the tilt angle detection mechanism, and drives, according to the tilt angle, the angle adjustment mechanism to enable the support plate1to rotate around the support column3.

It should be noted that the tilt angle collected by the tilt angle detection mechanism is used to represent a tilt degree of the support plate1, which may be a tilt degree of the camera module when a user's hand shakes.

Here, the tilt angle may include a tilt angle of the support plate and a tilt direction of the support plate.

In some embodiments, the driving apparatus is fixed to the first printed circuit board2. In some embodiments, the driving apparatus is a driving chip.

It should be noted that the driving apparatus receives the tilt angle collected by the tilt angle detection mechanism, and drives, according to the tilt angle, the angle adjustment mechanism to enable the support plate1to rotate around the support column3, thereby enabling the entire camera module to compensate an angle equal to the tilt angle of the support plate1in a direction opposite to the tilt direction of the support plate1, so as to achieve anti-shake.

In some embodiments, driving the angle adjustment mechanism to enable the support plate1to rotate around the support column3can be enabling the support plate1to rotate in a direction close to or away from the first printed circuit board2, that is, can be enabling any side of the support plate1to rotate close to or away from the first printed circuit board2.

In some embodiments, the support plate1is rotated around the support column3, and a distance between the support plate1and the first printed circuit board2can be changed. Exemplarily, a side of the support plate1may be close to the first printed circuit board2, and the other side may be away from the first printed circuit board2.

This way, the anti-shake mechanism with the foregoing structure has good universality, and can be matched with different camera modules, and the camera module can be installed on the anti-shake mechanism integrally. Because the camera module can be installed on the anti-shake mechanism integrally, tilt due to hand shake is compensated by tilting the entire camera module. That is, a lens and a chip in the camera module are tilted in an opposite direction together to achieve optical image stabilization. The lens does not move or tilt relative to the chip, so that better image quality and a larger anti-shake angle can be provided. In addition, optical design for the lens is easier, and a diameter of the lens can be smaller, which is not affected by a user's hand shake.

In some embodiments, the tilt angle detection mechanism includes: a magnetic element4, where the magnetic element4is fixed to a side of the support plate1close to the first printed circuit board2; and a Tunnel Magnetoresistance (TMR) angle sensor5, where the TMR angle sensor5is fixed to the first printed circuit board2, and the TMR angle sensor5is configured to sense an angle of a magnetic induction line of the magnetic element4. The angle of the magnetic induction line here includes a size and direction of the angle of the magnetic induction line.

It should be noted that, since the magnetic element4is fixed to the support plate1, a change in the angle of the magnetic induction line of the magnetic element4can reflect a change in tilt of the support plate1.

In some embodiments, the TMR angle sensor5is fixed to the first printed circuit board2and is disposed in a magnetic field of the magnetic element4. Such design is intended to enable the TMR angle sensor5to sense the angle of the magnetic induction line of the magnetic element4more accurately.

In some embodiments, the magnetic element4is a magnet.

In this implementation manner, the TMR angle sensor5is connected to the driving apparatus.

In some embodiments, the angle adjustment mechanism includes: at least one Shape Memory Alloy (SMA) wire7, one end of the SMA wire7is fixedly connected to the support plate1, and the other end of the SMA wire7is fixedly connected to the first printed circuit board2.

The driving apparatus is connected to the TMR angle sensor5and the SMA wire7, respectively, the driving apparatus receives a tilt angle collected by the TMR angle sensor5. A current in the SMA wire7is adjusted, so that a target SMA wire in the SMA wire7shrinks, to drive the support plate1to rotate around the support column3.

In some embodiments, there may be one, four, or five SMA wires. This is not limited in this embodiment of the present disclosure. Exemplarily, as shown inFIG.2, four shape memory alloy SMA wires are included and disposed around the support column3.

In some embodiments, the target SMA wire may be any SMA wire in at least one SMA wire. Exemplarily, in a case that the angle adjustment mechanism includes four SMA wires, the target SMA wire may be any SMA wire in the four SMA wires, and may be four SMA wires or any two SMA wires, which can be determined according to an actual situation.

In some embodiments, the angle adjustment mechanism includes: at least one spring plate6. The spring plate6is located between the support plate1and the first printed circuit board2, and is connected to the support plate1and the first printed circuit board2, respectively.

It should be noted that a function of the spring plate6is to support the support plate1stably in a non-working state. An initial state of the spring plate6has certain elastic deformation, that is, a pre-tension force pulls the support plate1down, that is, pulls the support plate1toward a direction close to the first printed circuit board2, so that the center of the support plate1is against the support column3. Therefore, the support plate1can rotate around a rotation pivot of the support column3.

In some embodiments, a material of the spring plate6is copper alloy.

In some embodiments, one end of the SMA wire7is welded with the spring plate6connected to the support plate1, and the other end of the SMA wire7is welded with the first printed circuit board2. One end of the spring plate6is welded with the first printed circuit board2, that is, a current path of the SMA wire7can be formed.

It should be noted that an initial state of the SMA wire7is loose. According to the principle of the SMA, when shake of a camera module is detected by a gyroscope, the anti-shake mechanism is enabled, and a current is introduced into the SMA wire7, and a target SMA wire in the SMA wire7shrinks and shortens to generate a pulling force, so as to pull the support plate1to rotate around the rotation pivot. Therefore, anti-shake can be implemented for the camera module. By controlling the current size in the SMA wire7, an anti-shake angle of the support plate1can be controlled.

Here, the TMR angle sensor5can sense the anti-shake angle of the support plate1in real time, and feed the anti-shake angle back to the driving apparatus, so as to achieve closed-loop control and improve accuracy of anti-shake.

In some embodiments, the anti-shake mechanism in an embodiment of the present disclosure further includes: a connector8; and a flexible circuit board9connected to the connector8and the first printed circuit board2, respectively.

Here, the connector is configured to connect and fix a connecting device of the first printed circuit board2. One end of the connector is connected to the first printed circuit board2through the flexible circuit board9, and the other end is connected to another circuit or circuit board, so that the current flows, and a predetermined function is achieved between the first printed circuit board2and the another circuit or circuit board.

In some embodiments, the center of the support plate1has a hemispherical groove (not shown in the figure). A first end of the support column3is in a protruding hemispherical shape toward the support plate1and contacts the hemispherical groove.

Here, the hemispherical groove on the support plate1is matched with a hemispherical end of the support column3. The hemispherical groove is used as a central pivot of rotation, to implement rotation of the support plate1around the support column3. Definitely, other shapes of the support column are also within the protection scope of the present disclosure.

In some embodiments, the support plate1is a steel plate.

It should be noted that the camera module is fixed to the support plate1. Since the support plate1is the steel plate, heat of a chip on the camera module can be conducted and dissipated through the support plate1, the support column3, and the spring plate6, so that a temperature of the chip on the camera module can be reduced, reducing an image quality problem caused by a high temperature of the chip.

For the anti-shake mechanism in the embodiment of the present disclosure, through the support plate, the first printed circuit board, and the support column fixedly installed on the first printed circuit board, where an end of the support column away from the first printed circuit board contacts the support plate; the tilt angle detection mechanism configured to detect the tilt angle of the support plate; and the angle adjustment mechanism located between the support plate and the first printed circuit board and connected to the support plate and the first printed circuit board, respectively, and the driving apparatus connected to the tilt angle detection mechanism and the angle adjustment mechanism, respectively, where the driving apparatus receives the tilt angle collected by the tilt angle detection mechanism, and drives, according to the tilt angle, the angle adjustment mechanism to drive the support plate to rotate around the support column, this way, the anti-shake mechanism with the foregoing structure has good universality, and can be matched with different camera modules, and the camera module can be integrally installed on the anti-shake mechanism. Therefore, anti-shake at a larger angle can be implemented, and imaging quality of the camera module can be improved.

As shown inFIG.3, an embodiment of the present disclosure further provides a camera module, including the anti-shake mechanism described in the foregoing embodiment; and a camera module fixed to the anti-shake mechanism.

In some embodiments, the camera module includes a second printed circuit board10, where the second printed circuit board10is fixedly connected to the support plate1.

In some embodiments, the second printed circuit board10is stuck to the support plate1.

Here, the second printed circuit board10is stuck to the support plate1, so that the camera module can be fixed to the anti-shake mechanism.

Here, the camera module further includes: a connector; and a flexible circuit board. The flexible circuit board is connected to the connector and the second printed circuit board10, respectively.

Here, the camera module can be integrally installed and fixed to the anti-shake mechanism. Because the camera module can be installed on the anti-shake mechanism entirely, tilt due to hand shake is corrected by tilting the entire camera module. That is, a lens and a chip in the camera module are tilted in an opposite direction together to achieve optical image stabilization. The lens does not move or tilt relative to the chip, so that better image quality and a larger anti-shake angle can be provided.

An embodiment of the present disclosure further provides an electronic device, including the camera module in the foregoing embodiment.

Here, the electronic device may be a portable mobile photographing product, or a camera product having functions of photographing and recording.

The embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is not limited to the foregoing specific implementation manners, and the foregoing specific implementation manners are only illustrative and not restrictive. Under the enlightenment of the present disclosure, a person of ordinary skill in the art can make many forms without departing from the purpose of the present disclosure and the protection scope of the claims, and all of these fall within the protection of the present disclosure.