Optical anti-shake self-locking device and camera module

Abstract

The utility model relates to an optical anti-shake self-locking device and a camera module, which are applied to an optical anti-shake module, the optical anti-shake module comprises a mover part and a stator part, and the optical anti-shake self-locking device is arranged between the mover part and the stator part; the optical anti-shake self-locking device comprises a limiting component which is fixedly arranged on the rotor part or the stator part; the movable part is mounted on the stator part when the limiting part is fixedly arranged on the rotor part; or when the limiting part is fixedly arranged on the stator part, the movable part is mounted on the rotor part; the movable part can move to a locking position under the action of external force and is matched with the limiting part to realize self-locking; the driving part is used for providing external force when needed, so that the movable part moves to the locking position; and the reset part is used for enabling the movable part to automatically return to the initial position after the external force is removed so as to realize unlocking. According to the utility model, the optical anti-shake module can be self-locked or unlocked according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of camera anti - shake, and particularly relates to an optical anti - shake self - locking device and a camera module. Background Technique

[0002] In the rapidly developing mobile phone lens industry, anti - shake technology has become one of the key factors to improve the shooting quality. Anti - shake technology is mainly divided into two categories: electronic image stabilization (EIS) and optical image stabilization (OIS). They each have their own advantages in improving image stability and clarity.

[0003] Electronic image stabilization (EIS) mainly compensates for shooting jitter through post - processing image technology, such as stretching and cropping. This technology does not rely on complex mechanical structures, so it can still work effectively in high - frequency vibration environments (such as ≥20HZ). However, the effect of EIS is limited by the size and resolution of the image sensor, and when the lens or the image sensor itself moves, its anti - shake effect will be affected.

[0004] Optical image stabilization (OIS) offsets jitter by precisely moving the lens, the image sensor, or the entire lens module. OIS technology usually uses the repulsive force generated by magnets and coils to achieve precise control of direction, thereby realizing anti - shake and autofocus (AF) functions. This technology can provide more stable and clear images, especially outstanding in low - light environments and long - focal - length shooting.

[0005] However, with the continuous improvement of people's photography technology and shooting requirements (such as shooting VLOG), the current OIS technology also faces some challenges. On the one hand, the mechanical structure of OIS (such as shrapnel and suspension wires) is prone to resonance in high - frequency vibration environments, resulting in a wavy jitter phenomenon in the image, affecting the clarity and quality of the image. On the other hand, when OIS and EIS are used simultaneously, since the mechanical movement of OIS will interfere with the image analysis of EIS, the synergy between the two is limited.

[0006] To solve these problems, the industry urgently needs a technology that can keep the OIS in the off state, that is, fix the lens at a certain fixed position when using EIS, to ensure that EIS can play its maximum role.

[0007] Therefore, it is necessary to develop a new optical anti - shake self - locking device and a camera module. Summary of the Invention

[0008] The purpose of the utility model is to provide an optical anti - shake self - locking device and a camera module, which can lock or unlock the optical anti - shake module as needed.

[0009] In a first aspect, an optical image stabilization self-locking device of the present utility model is applied to an optical image stabilization module. The optical image stabilization module includes a mover part and a stator part. The optical image stabilization self-locking device is disposed between the mover part and the stator part for realizing self-locking and unlocking of the optical image stabilization module.

[0010] Among them, the optical image stabilization self-locking device includes:

[0011] A limiting component fixedly disposed on the mover part or the stator part;

[0012] A movable component. When the limiting component is fixedly disposed on the mover part, the movable component is mounted on the stator part; or when the limiting component is fixedly disposed on the stator part, the movable component is mounted on the mover part. The movable component can be moved to a locking position under an external force and cooperate with the limiting component to realize self-locking;

[0013] A driving component for providing an external force when needed to move the movable component to the locking position;

[0014] A reset component for automatically returning the movable component to an initial position after the external force is withdrawn to realize unlocking.

[0015] Optionally, the limiting component is a limiting groove disposed on the mover part or the stator part. The use of a limiting groove as the limiting component has the advantages of simple structure and easy processing.

[0016] Optionally, the movable component is a positioning pin. The positioning pin is movably disposed in a pin seat. The pin seat is disposed on the mover part or the stator part and is directly opposite to the limiting groove. The use of the cooperation between the positioning pin and the limiting groove to realize the self-locking and unlocking functions of the optical image stabilization self-locking device has the advantages of simple structure and easy processing.

[0017] Optionally, the driving component is a driving coil sleeved outside the pin seat or the limiting groove. It is used to generate a magnetic field when energized, and move the positioning pin to a position in contact with the limiting groove through the action of the magnetic field, thereby realizing self-locking; when the driving coil is de-energized, the positioning pin is not in contact with the limiting groove, thereby realizing unlocking.

[0018] Optionally, the end of the positioning pin has an inclined surface or a spherical surface matching the limiting groove to facilitate the positioning pin to smoothly slide into the limiting groove under the action of the magnetic field.

[0019] Optionally, the reset component is a return spring. One end of the return spring is connected to the pin seat, and the other end of the return spring is connected to the positioning pin.

[0020] In a second aspect, a camera module according to the present utility model includes a lens and an optical image stabilization module. The optical image stabilization module includes a mover part and a stator part, and the optical image stabilization module employs the optical image stabilization self-locking device as described in the present utility model.

[0021] Optionally, there are four optical image stabilization self-locking devices, which are respectively arranged at the four corners of the optical image stabilization module. Arranging self-locking devices at the four corners can limit the movement of the optical image stabilization module in all horizontal directions to the greatest extent, thereby providing more comprehensive stability. The four optical image stabilization self-locking devices are evenly distributed at the four corners of the optical image stabilization module, which can ensure that in the locked state, stress is evenly distributed to the entire optical image stabilization module, reducing the risk of damage caused by stress concentration.

[0022] Optionally, there are two optical image stabilization self-locking devices, which are respectively arranged at one set of symmetric corners of the optical image stabilization module. Compared with four optical image stabilization self-locking devices, only using two symmetrically arranged optical image stabilization self-locking devices can simplify the structure and reduce the number of parts on the premise of ensuring reliability, thereby reducing the manufacturing cost.

[0023] Optionally, it further includes a jitter detection module, and the jitter detection module employs at least one of an acceleration sensor and a gyroscope.

[0024] The present utility model has the following advantages:

[0025] (1) When the present utility model does not require the image stabilization function, it can lock the mover part and the stator part to make the optical image stabilization module inoperative.

[0026] (2) The present utility model provides an external force through a driving component (such as a driving coil, etc.) to quickly move the movable component to the locking position and cooperate with the limiting component to achieve self-locking. This design allows for quick locking when needed, and when an unlocking signal is issued (by canceling the external force and the action of the reset component), the movable component can quickly return to the initial position to achieve quick unlocking, thereby meeting the requirements of quick response.

[0027] (3) The present utility model realizes automatic control through the cooperation of the driving component and the reset component, greatly simplifies the operation process, and improves the convenience of use.

[0028] (4) The design of the present utility model allows the limiting component and the movable component to be respectively installed on the mover part or the stator part. This flexibility enables the device to adapt to different models and specifications of optical image stabilization modules, improving its versatility and adaptability. Description of the Drawings

[0029] Figure 1 It is one of the state diagrams of the OIS self-locking device on the camera module in the embodiment of the present application;

[0030] Figure 2 This is the second state diagram of the OIS self-locking device described in the embodiments of the present application on the camera module;

[0031] Figure 3 This is the principle block diagram in the embodiments of the present application;

[0032] Marking description of the drawings:

[0033] 1. Rotor part, 2. Limit groove, 3. Stator part, 4. Positioning pin, 5. Return spring, 6. Pin seat, 7. Driving coil, 8. Jitter detection module, 9. Processor, 10. Hall sensor, 11. Optical image stabilization module, 12. Operation switch, 13. Electronic image stabilization module. Detailed implementation manners

[0034] The following will describe the implementation manners of the technical solution of the present invention with reference to the drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0035] As Figure 1 and Figure 2 shown, in the embodiments of the present application, an optical image stabilization self-locking device is applied to the optical image stabilization module 11. The optical image stabilization module 11 includes a rotor part 1 and a stator part 3. The optical image stabilization self-locking device is arranged between the rotor part 1 and the stator part 3 and is used to realize the self-locking and unlocking of the optical image stabilization module 11. Among them, the optical image stabilization self-locking device includes a limiting component, a movable component, a driving component and a reset component. The limiting component is fixedly arranged on the rotor part 1 or the stator part 3. When the limiting component is fixedly arranged on the rotor part 1, the movable component is installed on the stator part 3; or when the limiting component is fixedly arranged on the stator part 3, the movable component is installed on the rotor part 1; the movable component can be moved to the locking position under the action of an external force and cooperate with the limiting component to realize self-locking. The driving component is used to provide an external force when needed to move the movable component to the locking position. The reset component is used to automatically return the movable component to the initial position after the external force is withdrawn to realize unlocking.

[0036] As Figure 1 and Figure 2As shown, in the embodiment of the present application, the limiting component is a limiting groove 2 provided on the mover part 1 or the stator part 3. The movable component is a positioning pin 4, and the positioning pin 4 is movably arranged in a pin seat 6. The pin seat 6 is arranged on the mover part 1 or the stator part 3 and is directly opposite to the limiting groove 2.

[0037] As Figure 1 and Figure 2 shown, in the embodiment of the present application, the driving component is a driving coil 7, and the driving coil 7 is sleeved outside the pin seat 6 or the limiting groove 2. It is used to generate a magnetic field when energized, and through the action of the magnetic field, the positioning pin 4 is moved to a position in contact with the limiting groove 2, thereby realizing self-locking; when the driving coil 7 is de-energized, the positioning pin 4 is not in contact with the limiting groove 2, thereby realizing unlocking.

[0038] As Figure 1 and Figure 2 shown, the end of the positioning pin 4 has an inclined surface or a spherical surface matching the limiting groove 2, so as to facilitate the positioning pin 4 to smoothly slide into the limiting groove 2 under the action of the magnetic field.

[0039] As Figure 1 and Figure 2 shown, in the embodiment of the present application, the reset component is a return spring 5. One end of the return spring 5 is connected to the pin seat 6, and the other end of the return spring 5 is connected to the positioning pin 4.

[0040] In the embodiment of the present application, an optical image stabilization self-locking device further includes a Hall sensor 10 for detecting the state of the positioning pin 4 to real-time feedback the self-locking or unlocking state of the self-locking device. The Hall sensor 10 is a sensor that can detect parameters such as the presence, intensity, and direction of a magnetic field. When the driving coil 7 is energized, the driving coil 7 will generate a magnetic field. Through the Hall sensor 10, the magnetic field intensity and direction information generated by the driving coil 7 can be sensed, and based on the magnetic field intensity and direction information, it can be judged whether the self-locking device is in a self-locked state or an unlocked state. For the position of the Hall sensor 10, no limitation is made here, as long as the magnetic field intensity and direction information can be accurately sensed.

[0041] In the embodiment of the present application, the working principle of an optical image stabilization self-locking device is as follows:

[0042] When the optical image stabilization module 11 needs to work, the driving coil 7 is not energized, and the positioning pin 4 is in the initial position, that is, the positioning pin 4 is not in contact with the limiting groove 2. At this time, the self-locking device is in an unlocked state, and the optical image stabilization module 11 can work normally at this time.

[0043] When the optical image stabilization module 11 does not need to work, the drive coil 7 is energized. After the drive coil 7 is energized, a magnetic field is generated. Under the action of the magnetic field, the positioning pin 4 can be driven to move towards the mover part 1 and extend into the limit groove 2, so that the optical image stabilization self-locking device switches from the unlocked state to the self-locked state. At this time, the mover part 1 of the optical image stabilization module 11 cannot move left and right relative to the stator part 3. At this time, the optical image stabilization module 11 cannot work, and only the electronic image stabilization module 13 can be used for image stabilization.

[0044] In an embodiment of the present application, a camera module includes a lens and an optical image stabilization module 11. The optical image stabilization module 11 includes a mover part 1 and a stator part 3, and the optical image stabilization module 11 adopts the optical image stabilization self-locking device as in the embodiment of the present application.

[0045] As Figure 1 shown, in a possible embodiment, the pin seat 6 is arranged on the stator part 3. The limit groove 2 is arranged on the mover part 1, and the drive coil 7 is sleeved outside the pin seat 6.

[0046] As Figure 2 shown, in a possible embodiment, the limit groove 2 is arranged on the stator part 3. The pin seat 6 is arranged on the mover part 1, and the drive coil 7 is sleeved outside the limit groove 2.

[0047] In a possible embodiment, there are four optical image stabilization self-locking devices, which are respectively arranged at the four corners of the optical image stabilization module 11.

[0048] In a possible embodiment, there are two optical image stabilization self-locking devices, which are respectively arranged at one set of symmetric corners of the optical image stabilization module 11.

[0049] In a possible embodiment, the camera module further includes a jitter detection module 8. The jitter detection module 8 adopts at least one of an acceleration sensor and a gyroscope. It is used to obtain jitter information for an electronic device, where the jitter information at least includes a jitter frequency.

[0050] The camera module in the embodiment of the present application is applied to an electronic device. When taking pictures and videos using the electronic device, if the optical image stabilization function is not needed, the self-locking of the optical image stabilization module 11 can be achieved through the optical image stabilization self-locking device in the embodiment of the present application, and the optical image stabilization module 11 is not allowed to work.

[0051] As Figure 3As shown, in one possible embodiment, the electronic device further includes an operating switch 12 for manually controlling the self-locking function to be on or off. When the operating switch 12 is detected to be triggered, the optical image stabilization self-locking device is unlocked or locked accordingly based on the triggering state. Providing the user with the option of manually controlling the self-locking function in the electronic device allows the user to flexibly adjust the image stabilization strategy according to actual conditions, thereby improving the user experience.

[0052] The following describes the working principle of the optical image stabilization self-locking device in combination with specific usage scenarios:

[0053] Typically, the electronic device has a processor 9. In addition, the shooting mode of the electronic device includes a photo mode and a video mode. At the same time, the camera module or the electronic device also has an electronic image stabilization module 13. The processor 9 is respectively connected to the shake detection module 8, the Hall sensor 10, the drive coil 7, the optical image stabilization module 11 (referring to the part that needs to be electrically controlled), the operation switch 12 and the electronic image stabilization module 13, see Figure 3 .

[0054] In high-frequency vibration scenarios such as running and cycling, the traditional optical image stabilization module 11 may not be able to effectively offset vibrations, and may even introduce new image distortion or blur due to over-adjustment. In the embodiment of the present application, by automatically turning off the optical image stabilization function of the optical image stabilization module 11 in these specific situations (for example, when the shooting mode of the electronic device is determined to be video mode and the jitter information is greater than or equal to a preset jitter threshold), and instead using only the electronic image stabilization module 13 for anti-shake, it can handle image jitter more accurately and quickly, thereby significantly improving the clarity and stability of video recording, ensuring that the video image in motion remains smooth and delicate. At the same time, the present invention also reduces or eliminates the resonance phenomenon of OIS (optical image stabilization) in high-frequency vibration environments, further improving the stability and clarity of the image.

[0055] In the embodiments of this application, the term "high frequency" does not have an absolute, unified definition, as it depends on a variety of factors, including the response speed of the anti-shake system, the sensitivity of the sensor, and the anti-shake performance requirements of specific application scenarios. Generally speaking, any vibration that is greater than or equal to a preset vibration threshold (obtained through calibration) can be considered high-frequency vibration.

[0056] For conventional static photo or video shooting (e.g., when it is determined that the shooting mode of the electronic device is the video mode or the photo mode and the jitter information is less than a preset jitter threshold), especially when shooting handheld, the low-frequency vibration caused by hand shaking (e.g., about 6 Hz) is the main factor affecting image clarity. In the embodiments of the present application, the optical image stabilization function is still retained and automatically enabled in the photo shooting mode, effectively compensating for such low-frequency vibration and ensuring that the captured photos are sharp and blur-free, meeting the user's demand for high-quality static images.

[0057] In existing camera modules with OIS image stabilization function, when the photosensitive chip is fixed, the optical image stabilization module 11 is used to drive the lens to move relative to the photosensitive chip for optical image stabilization. When the lens is fixed, the optical image stabilization module 11 is used to drive the photosensitive chip to move relative to the lens for optical image stabilization.

[0058] In a specific embodiment, taking the case where the photosensitive chip is fixed and the lens is movable as an example, the lens includes a lens for imaging and other possible optical elements. In OIS image stabilization, the movement of the lens is driven to compensate for the jitter of the electronic device. Among them, the stator part 3 of the optical image stabilization module 11 generally includes:

[0059] Base or frame: The fixed foundation of the optical image stabilization module 11, used to support and fix other components.

[0060] Photosensitive chip: Usually an image sensor (such as a CMOS sensor), used to capture images.

[0061] Drive circuit and control chip: Responsible for receiving the signals of the gyroscope, calculating the anti-shake compensation amount, and controlling the movement of the mover part 1.

[0062] Position sensor: Used to detect the current position of the mover part 1 (such as the lens) for precise control and adjustment. These position sensors may include Hall sensors 10 or optoelectronic sensors, etc.

[0063] In a specific embodiment, taking the case where the photosensitive chip is fixed and the lens is movable as an example, the mover part 1 of the optical image stabilization module 11 generally includes:

[0064] Actuator: The mechanism responsible for driving the lens or lens group to move. The actuator may include an electromagnetic driver, a shape memory alloy (SMA) driver, or other types of drivers.

[0065] Suspension wire or suspension system: Used to suspend the lens or lens group on the base and allow it to move within a certain range. The suspension wire or suspension system usually has sufficient stiffness and flexibility to provide a stable anti-shake effect.

[0066] Anti-shake mechanism: A mechanical structure that specifically implements the anti-shake function. These mechanical mechanisms compensate for the jitter of the electronic device by changing the position of the lens relative to the photosensitive chip.

[0067] In the embodiments of the present application, the electronic device is any one of a smart phone, a tablet computer, a digital camera, or a portable video camera. The scope of application is wide, which can meet the needs of different users and improve the popularity and application value of the anti-shake technology.

[0068] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. An optical image stabilization self-locking device is applied to an optical image stabilization module (11), and the optical image stabilization module (11) includes a mover part (1) and a stator part (3), characterized in that, The optical image stabilization self-locking device is arranged between the mover part (1) and the stator part (3) and is used to realize the self-locking and unlocking of the optical image stabilization module (11). Among them, the optical image stabilization self-locking device includes: A limiting component, fixedly arranged on the mover part (1) or the stator part (3); A movable component. When the limiting component is fixedly arranged on the mover part (1), the movable component is installed on the stator part (3); or when the limiting component is fixedly arranged on the stator part (3), the movable component is installed on the mover part (1). The movable component can be moved to the locking position under the action of an external force and cooperate with the limiting component to realize self-locking; A driving component, used to provide an external force when needed to move the movable component to the locking position; A reset component, used to automatically return the movable component to the initial position after the external force is withdrawn to realize unlocking.

2. The optical image stabilization self-locking device according to claim 1, wherein The limiting component is a limiting groove (2) arranged on the mover part (1) or the stator part (3).

3. The optical image stabilization self-locking device according to claim 2, wherein The movable component is a positioning pin (4). The positioning pin (4) is movably arranged in a pin seat (6). The pin seat (6) is arranged on the mover part (1) or the stator part (3) and is directly opposite to the limiting groove (2).

4. The optical image stabilization self-locking device according to claim 3, wherein The driving component is a driving coil (7). The driving coil (7) is sleeved outside the pin seat (6) or the limiting groove (2).

5. The optical image stabilization self-locking device according to claim 3, wherein The end of the positioning pin (4) has an inclined surface or a spherical surface matching the limiting groove (2).

6. The optical image stabilization self-locking device according to claim 3, wherein, The reset component is a return spring (5). One end of the return spring (5) is connected to the pin seat (6), and the other end of the return spring (5) is connected to the positioning pin (4).

7. A camera module, comprising a lens and an optical image stabilization module (11), wherein the optical image stabilization module (11) includes a mover part (1) and a stator part (3), and is characterized in that, The optical image stabilization module (11) adopts the optical image stabilization self-locking device according to any one of claims 1 to 6.

8. The camera module according to claim 7, wherein, There are four optical image stabilization self-locking devices, which are respectively arranged at the four corners of the optical image stabilization module (11).

9. The camera module according to claim 7, wherein, There are two optical image stabilization self-locking devices, which are respectively arranged at one group of symmetric corners of the optical image stabilization module (11).

10. The camera module according to claim 7, wherein It further includes a jitter detection module (8). The jitter detection module (8) adopts at least one of an acceleration sensor and a gyroscope.

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