WO2021032019A1 - Optical image stabilizer, optical image stabilizer system and control method - Google Patents

Abstract

Embodiments of the present application provide an optical image stabilizer, an optical image stabilizer system, and a control method therefor. The optical image stabilizer and system can be used in a camera module of an electronic device, wherein the optical image stabilizer comprises an actuation component and an image sensor, and the actuation component comprises a supporting stage, a base, a first electrode and a second electrode. The supporting stage supports the image sensor, the surface of the supporting stage facing the base is provided with the first electrode, and the surface of the base facing the supporting stage is provided with the second electrode. When an impact is about to occur, by means of electrostatic attraction between the first and second electrodes, the supporting stage provided with the first electrode is attracted to the base provided with the second electrode, so that the optical image stabilizer has no suspension structure. The optical image stabilizer can be protected from damage when an impact occurs.

Description

Optical image stabilizer, optical image stabilizer system and control method

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910766882.5, and the invention title is "Optical Image Stabilizer, Optical Image Stabilizer System and Control Method" on August 16, 2019. The reference is incorporated in this application.

Technical field

This application relates to the field of electronics and communication technologies, and in particular to optical image stabilizers, optical image stabilizer systems and control methods thereof.

Background technique

In daily life, people often use electronic devices (such as smart phones, tablet computers, etc.) to take pictures. Therefore, the photographing quality of electronic devices has become one of the important standards for measuring electronic devices.

The jitter that occurs during the photographing and photography of electronic equipment will cause the image of the object to be photographed on the image sensor, such as CMOS image sensor (CIS), to shift. The optical image stabilizer (OIS) is used to reversely move the lens group or move the CIS to compensate for the displacement of the lens group and the CIS due to the shake of the electronic equipment during the exposure, which can suppress the image blur caused by the shake and improve Image quality. In addition, electronic devices are subject to extensive drops and collisions during use, and the optical image stabilizer has a suspended structure, which is easily damaged under corresponding impacts. In order to prevent damage to the optical image sensor inside the camera module when the electronic device falls or collides, it is necessary to protect the optical image stabilizer under impact.

At present, the optical image stabilizer inside the camera module is protected against impact mainly by passive or active means. Passive anti-impact usually compresses the damping member to deform when subjected to an impact to relieve the impact of the optical image stabilizer. However, the passive impact resistance is limited by the material of the damping member, and the impact resistance effect is average, and it cannot ensure the prevention of the secondary impact caused by the rebound after the primary impact. Compared with the passive anti-shock device, the existing active anti-shock device usually uses electromagnetic force to fix the lens group stage when it is impacted, so as to alleviate the impact of the optical image stabilizer. The electromagnetic force used by the active anti-impact device is likely to cause electromagnetic interference and is not conducive to the miniaturization of the module. The electromagnetic force has a limited degree of adhesion under a large overload impact.

Summary of the invention

The application provides an optical image stabilizer, an optical image stabilizer system and a control method.

The following describes the application from multiple aspects. It is easy to understand that the implementation manners of the following multiple aspects can be referred to each other.

In the first aspect, an embodiment of the present application provides an optical image stabilizer, including: an image sensor and an actuation component. The actuating component includes a carrying platform, a substrate, a first electrode, and a second electrode. The carrying table carries the image sensor, the carrying table is provided with the first electrode facing the surface of the substrate, and the substrate is provided with the second electrode facing the surface of the carrying table. When the first electrode and the second electrode are in a non-energized state, the image sensor carried by the carrier is in a floating state; when the first electrode and the second electrode are in a energized state, the The carrying platform of the first electrode is attracted to the substrate provided with the second electrode to fix the image sensor. It can be seen that when an impact is about to occur, the carrier where the first electrode is provided is attracted to the substrate where the second electrode is provided, so that the optical image stabilizer has no floating structure. Therefore, it can be realized that the optical image stabilizer is not damaged under the impact of a large overload, and the use stability is improved.

According to the first aspect, in a possible implementation manner, when the carrier where the first electrode is provided is attracted to the substrate where the second electrode is provided, the first electrode and the second electrode They are separated by insulating pads. The insulating pad can ensure that no short circuit occurs when the first and second electrodes are attracted together. Optionally, the insulating pad may be located on the first electrode or on the second electrode.

According to the first aspect, in a possible implementation manner, the insulating pad has a cantilever structure. The cantilever beam structure enhances the cushioning effect of the impact force generated during suction. In addition, the insulating pad may be an elastic insulating material, and when the carrying platform on which the first electrode is provided is attracted to the substrate on which the second electrode is provided, the insulating pad made of the elastic material The pad can relieve the impact force of the second electrode moving toward the first electrode.

According to the first aspect, in a possible implementation manner, the second electrode covers the orthographic projection of the first electrode. When an impact is about to occur, the first electrode and the second electrode are aligned with each other. The pull-in reduces the area of the second electrode and reduces the lateral pulling force of the second electrode to the first electrode.

According to the first aspect, in a possible implementation manner, the second electrode covers all areas of the orthographic projection of the active range of the first electrode. When an impact is about to occur, the first electrode and the second electrode can immediately enter the attracting state, and the image sensor carried by the carrier is in a non-suspended state, so as to stabilize and protect the optical image stabilizer.

According to the first aspect, in a possible implementation manner, the actuating member further includes an elastic connecting member and a driver, wherein: the elastic connecting member is connected to the carrying table; the driver is connected to the base and the An elastic connecting piece, the driver drives the carrying table to move through the elastic connecting piece, so that the carrying table is in a suspended state. Optionally, the driver includes a movable part and a fixed part, the fixed part of the driver is connected with the base, and the movable part of the driver is connected with the elastic connecting member; the movable part of the driver is connected with the elastic connecting member; The connecting piece drives the bearing platform to move, so that the bearing platform is in a suspended state.

According to the first aspect, in a possible implementation manner, the drivers are in three or more groups, and the image sensor carried by the carrier is suspended in a space enclosed by the drivers. The three or more sets of drivers can drive the image sensor to translate and rotate in the plane where the imaging surface of the image sensor is located through the bearing platform.

According to the first aspect, in a possible implementation manner, a buffer pad is provided between the image sensor and the driver, and the height of the buffer pad and the insulating pad provided between the first electrode and the second electrode The height is the same. In this case, when an impact is about to occur, when the first and second electrodes are attracted together, the image sensor carried by the carrier is in a non-suspended state, and the overall structure of the optical image stabilizer is more stable.

According to the first aspect, in a possible implementation manner, the distance between the image sensor and the driver is equal to the distance between the first electrode and the second electrode, and the distance is equal to ensure Before the impact, when the first and second electrodes are attracted to each other, the image sensor carried by the carrier is in a non-suspended state, and the overall structure of the optical image stabilizer is more stable.

According to the first aspect, in a possible implementation manner, the driver is an electrostatic driver, the fixed part of the electrostatic driver and the movable part of the electrostatic driver are respectively provided with finger electrodes, and the fixed part of the electrostatic driver The finger electrodes on the upper and the finger electrodes on the movable part of the electrostatic driver cooperate with each other to form an electrostatic comb structure.

According to the first aspect, in a possible implementation manner, under the action of electrostatic force, the carrier where the first electrode is provided is attracted to the substrate where the second electrode is provided. For example, under the action of the electrostatic force between the first electrode and the second electrode, the first electrode can drive the image sensor to the direction of the substrate where the second electrode is arranged through the carrier. movement. The optical image stabilizer uses electrostatic force to attract the carrier where the first electrode is placed and the substrate where the second electrode is placed, which not only avoids electromagnetic interference caused by the application of electromagnetic force, but also makes The overall miniaturization of the optical image stabilizer.

According to the first aspect, in a possible implementation manner, the magnitude of the electrostatic force is inversely proportional to the distance between the first electrode and the second electrode. During the pull-in process, the distance between the first electrode and the second electrode is continuously reduced, the electrostatic force is continuously increased, and the increase speed of the electrostatic force is higher than that caused by the deformation of the elastic connector The increasing speed of the elastic restoring force, so the electrostatic attraction time is short, the electrostatic attraction force is large, and it does not depend on the increase in voltage, which can make the optical image stabilizer quickly enter the shock-resistant state. When an impact is about to occur, the image sensor carried by the carrier is quickly attracted to the second electrode through the first electrode, the floating structure disappears, and the image sensor and the substrate form a stable whole to resist the impact. In addition, the electrostatic attraction force is large, and the first and second electrodes have a good adhesion effect under a large overload impact, and can resist secondary impact.

In the second aspect, an embodiment of the present application provides an optical image stabilizer system, which is applied to an electronic device and includes a sensor, a processor, and an optical image stabilizer provided by any of the foregoing implementation manners. The sensor is used to collect spatial information of the electronic device; the processor is used to determine whether the sensor signal exceeds a preset threshold, and when the sensor signal does not exceed the preset threshold, control the optical image stabilization When the sensor signal exceeds the preset threshold, the optical image stabilizer is controlled to work in the first and second electrode energized states. Through the spatial information collected by the sensor and the processor to judge the collected spatial information, the optical image stabilizer can be protected in time and accurately before the impact, which effectively reduces the damage to the image sensor. Probability. When the impact is over, the pull-in voltage is released, the upper and lower electrodes return to the non-energized state, and the bearing platform drives the vertical distance between the CIS and the lower electrode under the action of the elastic restoring force of the elastic connector When the initial value is reached, the bearing platform carrying the CIS is in a suspended state, and the optical image stabilizer returns to its normal working form.

According to the second aspect, in a possible implementation manner, the magnitude of the electrostatic force is inversely proportional to the distance between the first electrode and the second electrode.

According to the second aspect, in a possible implementation manner, the sensor includes at least one of an acceleration sensor, a gyroscope sensor, a light sensor, and the image sensor, wherein the sensor collecting spatial information of an electronic device includes an acceleration sensor The axis acceleration of the electronic device is collected, the gyro sensor collects the posture angular velocity of the electronic device, the image sensor collects the image change rate, and the light sensor collects the change rate of light. The sensor can collect at least one aspect of the signal, so that the processor can make a judgment from one aspect of the signal or a combination of multiple aspects of the signal, which improves the accuracy of the impact judgment and improves the performance of the optical image stabilizer. Impact resistance.

In a third aspect, an embodiment of the present application provides a camera module, the camera module includes a lens group, a lens barrel, and the optical image stabilizer provided by any of the implementation manners of the first aspect, the lens barrel accommodates The lens group and the optical image stabilizer, the optical image stabilizer is located below the lens group, and the imaging light beam passes through the lens group and forms an image on the image sensor. In order to prevent damage to the image sensor inside the camera module when the electronic device is dropped or collided, the optical image stabilizer under impact is effectively protected.

In a fourth aspect, an embodiment of the present application provides a control method of an optical image stabilizer. The control method includes: receiving a sensor signal; determining whether the sensor signal exceeds a preset threshold; when the sensor signal exceeds the preset threshold Threshold, the voltage between the first electrode and the second electrode of the optical image stabilizer is controlled so that the carrier where the first electrode is provided is attracted to the substrate where the second electrode is provided, thereby stabilizing the The image sensor carried by the carrier. It can be seen that when the processor judges that the optical image stabilizer enters the anti-impact state according to the received sensor signal, that is, the first and second electrodes are energized, the bearing platform of the first electrode can drive the image sensor to the installation location. The movement of the second electrode in the direction of the substrate causes the carrying table to attract the substrate, and the optical image stabilizer has no suspension structure. Therefore, the optical image stabilizer is protected from being damaged under a large overload impact, and the use stability is improved. When the impact is over, the pull-in voltage is released, the upper and lower electrodes return to the non-energized state, and the bearing platform drives the vertical distance between the CIS and the lower electrode under the action of the elastic restoring force of the elastic connector When the initial value is reached, the bearing platform carrying the CIS is in a suspended state, and the optical image stabilizer returns to its normal working form.

According to the fourth aspect, in a possible implementation manner, the sensor signal includes at least one of the axial acceleration of the electronic device, the posture angular velocity of the electronic device, the image change rate, and the change rate of light intensity. The control method improves the accuracy of impact judgment by receiving at least one sensor signal, so as to improve the impact resistance of the optical image stabilizer.

According to the fourth aspect, in a possible implementation manner, under the action of electrostatic force, the carrying table provided with the first electrode is attracted to the substrate provided with the second electrode, and the electrostatic force The size of is inversely proportional to the distance between the first electrode and the second electrode. The increase speed of the electrostatic force is higher than the increase speed of the elastic force, the time required for electrostatic attraction is short, and the voltage does not depend on the increase, so that the optical image stabilizer quickly enters the shock-resistant state. When an impact is about to occur, the image sensor carried by the carrier is quickly attracted to the second electrode through the first electrode, the image sensor carried by the carrier is in a non-suspended state, and the image sensor and the substrate form a stable whole to resist Shock. In addition, the electrostatic attraction force is large, and the first and second electrodes have a good adhesion effect under a large overload impact, and can resist secondary impact.

According to the fourth aspect, in a possible implementation manner, when the sensor signal exceeds the preset threshold, the bearing platform returns to the position directly opposite to the second electrode under the action of the spring restoring force and the driving force. , Controlling the voltage between the first electrode and the second electrode of the optical image stabilizer so that the carrier on which the first electrode is arranged is attracted to the substrate on which the second electrode is arranged. The image sensor is in a non-suspended state, thereby stabilizing the optical image stabilizer.

According to the fourth aspect, in a possible implementation manner, when the sensor signal exceeds the preset threshold, the carrying platform and the image sensor on which the first electrode is set maintain their current positions, and control the The voltage between the first electrode and the second electrode of the optical image stabilizer, so that the carrier on which the first electrode is arranged and the substrate on which the second electrode is arranged are attracted, thereby stabilizing the image carried by the carrier sensor. When an abnormality is about to occur, the first electrode does not need to be aligned with the second electrode, and the driving force of the carrying table carrying the first electrode and the restoring force of the elastic connecting member remain unchanged, and it can be attracted to the lower electrode. Together.

In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the method for controlling the optical image stabilizer system in the fourth aspect is realized.

Therefore, in any aspect of the embodiments of the present application and any possible implementation manner of any aspect, when an impact is about to occur, use the electrostatic attraction of the first and second electrodes to set the first The carrying platform of the electrode is attracted to the substrate on which the second electrode is arranged, and the image sensor carried by the carrying platform is in a non-suspended state, so that the optical image stabilizer has no suspension structure. When an impact occurs, the optical image stabilizer can be protected from damage.

Description of the drawings

FIG. 1 is a schematic structural diagram of a camera module provided by Embodiment 1 of the present application;

FIG. 2 is a schematic structural diagram of an optical image stabilizer provided by Embodiment 2 of the present application;

FIG. 3 is a schematic structural diagram of an optical image stabilizer provided by Embodiment 3 of the present application;

4 is a schematic structural diagram of an optical image stabilizer provided by Embodiment 4 of the present application;

5 is a schematic structural diagram of an optical image stabilizer provided by Embodiment 5 of the present application;

6 is an analysis diagram of the principle of electrostatic attraction between the first and second electrodes of the optical image stabilizer in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of the first and second electrodes of the optical image stabilizer provided by the present application in a non-energized state (a) and an energized state (b);

FIG. 8 is a schematic top view of a driver of an actuating component of an optical image stabilizer according to an embodiment of the present application;

9 is a schematic top view of a driver of another actuation component of an optical image stabilizer provided by an embodiment of the present application;

10 is a schematic structural diagram of an optical image stabilizer system provided by an embodiment of the present application;

11 is a schematic flowchart of a method for controlling an optical image stabilizer system according to an embodiment of the application;

FIG. 12 is a schematic flowchart of another method for controlling an optical image stabilizer system according to an embodiment of the application;

The label of each component in the figure is as follows:

Image sensor (CIS) 1, first electrode 10, second electrode 12, insulating pad 14, carrying table 16, buffer pads 18a, 18b, driver 20, movable part of the driver 20a, fixed part of the driver 20b, substrate 22, Insulation layer 24, upper solder pad 26, lower solder pad 28, elastic connector 30, connection bump 32, filter 34, holder 36, lens group 180, lens barrel 120, optical image stabilizer 100-500, The PCB 140, the camera module 1000, the actuation component 60, the movable conductive electrode plate 601, the conductive fixed electrode plate 602, the fixed anchor point 605, and the elastic connector 606.

detailed description

The embodiments of the present application provide an optical image stabilizer, an optical image stabilizer system and a control method thereof. The stabilizer and the stabilizer system can be applied to electronic devices with camera functions, for example, can be applied to mobile phones, tablet computers, Digital cameras and other electronic equipment. The optical image stabilizer of the embodiment of the present invention includes a first electrode and a second electrode. When an impact is about to occur, the first and second electrodes of the optical image stabilizer are in a energized state, and the first electrode is set to bear The stage and the substrate on which the second electrode is arranged are attracted under the action of electrostatic force, so the floating state of the image sensor carried by the carrying stage disappears, and the stabilizer as a whole becomes a fixed structure, which is not easily damaged during impact. And since the magnitude of the electrostatic force is inversely proportional to the distance between the first electrode and the second electrode, the suction of the carrier and the substrate is firm, and the suction can be ensured even under a large impact, and no secondary impact Impact. The use of electrostatic force has no electromagnetic interference and is conducive to the miniaturization of the optical image stabilizer, can prevent secondary impact, and can still stably protect the optical image stabilizer under large overload impact. Secondary shock refers to the second shock caused by rebound after one shock.

FIG. 1 shows a camera module 1000 provided in the first embodiment of this application. The camera module 1000 is mainly used in electronic equipment to realize the functional scene of optical image stabilization, and includes a lens group 180, a lens barrel 120, and a stabilizer 100. The lens group 180 is located in the lens barrel 120 and above the stabilizer 100. The stabilizer 100 is mainly arranged in the camera module 1000 to actively resist impact. The stabilizer 100 may be an optical image stabilizer (Optical image stabilizer, OIS).

The function of the lens group 180 is to use the refraction effect of the lens to change the optical path of light from the outside, so as to focus the scene of the outside on the image sensor 1. Among them, the lens group 180 usually includes one or more transparent optical lenses (that is, lenses). These optical lenses are arranged at different positions along the axis of the lens group 180 (that is, the direction of the optical axis of the lens group 180) and irradiate into the lens. When the ambient light of the group 180 advances along the optical axis of the lens group 180, it will be refracted when passing through different optical lenses, and finally focused on the photosensitive surface of the image sensor 1, so that the image sensor 1 forms a clear image.

The stabilizer 100 includes an actuating member 60 and an image sensor 1.

The actuation component 60 is, for example, a micro electromechanical system (MEMS) motor. Preferably, the optical anti-shake actuation component is directly or indirectly connected to the CIS 1 and compensates for the shaking of the camera module by controlling the CIS 1 to move in the reverse direction. Specifically, the hand vibration can be detected by a sensor such as a gyro sensor and converted into an electrical signal. After processing, a control signal is formed to control the optical anti-shake actuation component to drive the photosensitive surface of the CIS 1 to move in its plane. Eliminate imaging shift and jitter caused by hand shake. Among them, a microelectromechanical system (MEMS) motor is one of the optical anti-shake actuation components. Micro-Electro-Mechanical System (MEMS) refers to a hybrid electrical and micro-mechanical system with dimensions on the order of micrometers or even sub-micrometers. MEMS manufacturing technology is a processing technology specifically used to manufacture microelectromechanical systems. Use MEMS manufacturing technology to make MEMS motors and use them to drive CIS to achieve OIS function. Compared with other methods, such as using voice coil motors, this method has a very obvious size advantage and helps the entire camera. The miniaturization of the module is suitable for the development requirements of existing electronic equipment.

The image sensor 1, such as a CMOS image sensor (CMOS image sensor, CIS), is a device that converts optical signals into electrical signals. The image sensor 1 is located on the imaging side of the lens group 180, and external light can be focused on the photosensitive surface of the image sensor 1 through the lens group 180. The photosensitive element on the photosensitive surface collects and records information such as the light intensity of the light. Form an image. The image sensor 1 may also be called an image sensor, or a photosensitive chip, or a photosensitive element. Specifically, the photosensitive surface of the image sensor 1 may be perpendicular to the optical axis of the lens group 180.

Wherein, in this embodiment, the actuating component 60 includes: a first electrode 10, a second electrode 12, a carrying platform 16, a substrate 22, a driver 20 and a PCB board. In this embodiment, the first electrode is the upper electrode and the second electrode is the lower electrode as an example.

The soldering pads of the first and second electrodes 10, 12 and the soldering pads of the CIS 1 are connected to the soldering pads on the PCB board 140 through binding wires to realize the connection between the actuating component 60 and the external control circuit. Electrical connections. When the camera module 1000 is working, the imaging light beam of the photographed object passes through the imaging lens group 180 and is imaged on the CIS 1. In the non-energized state of the first and second electrodes 10, 12, that is, in the normal working form of the optical image stabilizer, the electronic device senses the jitter when taking pictures, generates a voltage control signal, and controls the actuating component 60 When moving, the actuating component 60 drives the CIS 1 to generate a compensation displacement, and the compensation displacement is used to compensate the displacement generated when the CIS 1 shakes. The actuating component 60 can drive the CIS 1 to complete translation and rotation in the plane where the imaging surface of the CIS 1 is located, thereby realizing the optical image anti-shake function. By arranging the first and second electrodes 10, 12 on the lower surface of the carrier 16 and the upper surface of the base 22 of the actuating member 60, the upper surface of the carrier 16 carries the CIS 1, and the CIS1 carried by the carrier 16 is suspended State, that is, the CIS 1 is suspended above the substrate 22. When the camera module 1000 is in a normal working state, that is, when there is no impact or when the impact is over, no voltage is applied to the first and second electrodes 10, 12, and the first electrode 10 is suspended in the second Above the electrode 12. When the camera module 1000 is about to be impacted, the first and second electrodes 10, 12 are in a energized state, and the first and second electrodes 10, 12 are attracted by electrostatic force, so as to achieve the CIS 1 and the substrate 22 attracts each other, so that the suspension structure disappears during impact, and the optical image stabilizer 100 becomes a fixed structure as a whole, which is not easily damaged during the impact. In addition, due to the electrostatic attraction, the loading platform 16 and the substrate 22 are firmly attracted, and the attraction can be ensured even under a large overload impact, and will not be affected by the secondary impact. In addition, the use of electrostatic force has no electromagnetic interference and is beneficial to miniaturization, and can prevent secondary shocks, and can stably protect the optical image stabilizer 100 under large overload shocks.

In a specific real-time example, when an impact is about to occur, that is, when the CIS 1 and the carrier 16 maintain their current positions, the power supply applies a selected pull-in voltage, and the first, The second electrodes 10 and 12 pull together and enter the shock-resistant form to receive the shock.

In a specific embodiment, when an impact is about to occur, the actuating member 60 exerts an additional driving force on the bearing table 16, and the CIS 1 and the bearing table 16 are in response to the spring restoring force and the actuating member After moving back to the position directly opposite to the second electrode 12 under the driving force of 60, the power supply applies a selected pull-in voltage to the first and second electrodes 10, 12, the first, The second electrodes 10 and 12 are attracted under the action of electrostatic force, and enter the shock-resistant form to receive the shock.

The design solution of the camera module 1000 in this application can be applied to user equipment with two or more camera modules to improve the user's photographing experience. In addition, the design solution of the camera module 1000 in the present application can be applied to a periscope or upright camera module, and the actuating component 60 in the periscope or upright camera module can generally be a MEMS motor.

The above is an explanation of various components involved in each embodiment of the camera module 1000 in the present application, so as to facilitate the understanding of those skilled in the art. It should be noted that the components listed above are not necessary components of the camera module in this application.

In the following, various embodiments of the optical image stabilizer 200-500, system 1010 and methods 1100, 1200 provided by this application will be described in conjunction with FIGS. 2-12. In the embodiments of FIGS. 2-12, the first electrode is the upper electrode. Taking the second electrode as the lower electrode as an example, the first electrode and the second electrode have opposite polarities in the energized state. The optical image stabilizers 200-500 in FIGS. 2 to 5 can be applied to the camera module 1000 in FIG. 1, for example, can realize the function of the optical image stabilizer 100 in the camera module 1000.

As shown in FIG. 2, the optical image stabilizer 200 provided in the second embodiment of the present application includes: a CIS 1, and an actuating component 60. The actuating component 60 includes a carrier 16, a base 22, an upper electrode 10, and a lower electrode. 12. Insulation pad 14, cushion pads 18a, 18b and elastic connecting member 30. The carrying table 16 carries the CIS 1, the carrying table 16 is provided with the upper electrode 10 facing the surface of the substrate, and the substrate 22 is provided with the lower electrode 12 facing the surface of the carrying table; When the lower electrode is in a non-energized state, the carrier 16 carrying the CIS 1 is suspended on the base 22 through the elastic connecting member 30; in the state where the upper and lower electrodes are energized, the upper electrode 10 is set The carrying table 16 drives the CIS 1 to move in the direction of the substrate 22 on which the lower electrode 12 is arranged, so that the carrying table on which the upper electrode is arranged is attracted to the substrate on which the lower electrode is arranged. The CIS 1 carried by the carrier is in a non-suspended state to stabilize the optical image stabilizer.

The upper electrode 10 is connected to the CIS 1 through the carrying platform 16. The carrying platform 16 carries the CIS 1. The CIS 1 can be directly fixed to the upper surface of the carrying platform 16, or connected to the carrying platform 16 through a connecting member such as a connecting bump 32. The distance between the CIS 1 and the carrying platform 16 can be Through the connection between the adjustment. The upper electrode 10 is a conductive material, including but not limited to metal, heavily doped semiconductor, etc., or an insulating material for depositing a conductive layer. The area of the upper electrode 10 is not greater than the area of the lower surface of the carrying platform 16. The upper electrode 10 passes through the bearing platform 16, the elastic connecting member 30, and the fixed portion 20b of the driver is then led out by the upper welding pad 26 and connected to the power supply. The carrying platform 16, the elastic connecting member 30, the fixing portion 20b, and the solder pad 26 are all conductive materials. The carrying platform 16 is connected to the movable part 20a of the driver through the elastic connecting member 30. Since the elastic connecting member 30 provides cantilever support for the carrying table 16, the carrying table 16 carrying the CIS 1 is suspended above the base 22 through the elastic connecting member 30.

As shown in FIG. 2, the lower electrode 12 is fixed on the substrate 22, and the insulating pad 14 is located on the lower electrode 12 opposite to the upper electrode 10. The bottom electrode 12 is surrounded by an insulating layer 24, and the insulating layer 24 is also located on the substrate 22. The lower electrode 12 passes through the insulating layer 24 through an electrical lead 34 and is led out from the lower bonding pad 28 to be connected to the power supply. The lower electrode 12 and the insulating pad 14 cover the orthographic projection of the upper electrode 10. The lower electrode 12 is located in the enclosed area of the insulating layer 24, and only after the upper electrode 10 returns to the position facing the lower electrode 12, it is attracted to the lower electrode 12 to reduce the The area of the lower electrode 12 and the insulating pad 14 reduces the lateral electrostatic tension of the upper electrode 10 from the lower electrode.

The insulating pad 14 is made of an insulating material with high friction, elasticity, and deformability, such as rubber. When an impact is about to occur, when the upper electrode 10 and the lower electrode 12 are attracted by electrostatic force, the insulating pad 14 is an elastic and deformable material, which can buffer the upper electrode 10 from hitting the insulating pad The impact at 14 o'clock. The insulating pad 14 has a high friction force, which can reduce the sliding caused by the impact in all directions including the optical axis direction after the upper electrode 10 is attracted to the lower electrode, thereby further reducing the impact damage. In addition, the high friction force of the insulating pad 14 and the deformable material characteristics can make the upper and lower electrodes 10, 12 more firmly attracted and not easily separated due to secondary impact. Structurally, the insulating pad 14 is not limited to a flat plate structure, and may also be a cantilever beam structure.

FIG. 3 is a schematic structural diagram of an optical image stabilizer provided in the third embodiment of the application. The optical image stabilizer in FIG. 3 is similar to that in FIG. 2. The difference between FIG. 3 and FIG. 2 lies in the lower electrode 12 and The insulating pad 14 covers all areas of the orthographic projection of the movable range of the upper electrode 10.

FIG. 4 is a schematic structural diagram of an optical image stabilizer provided in the fourth embodiment of the application. The optical image stabilizer in FIG. 4 is similar to that in FIG. 3, and the lower electrode 12 and the lower electrode 12 in FIG. 4 and FIG. The insulating pad 14 covers all areas of the orthographic projection of the movable range of the upper electrode 10. The insulating pad 14 in FIG. 4 is a cantilever beam structure.

5 is a schematic structural diagram of an optical image stabilizer provided by Embodiment 5 of the application. The optical image stabilizer in FIG. 5 is similar to that in FIG. 4, and the insulating pads 14 in FIGS. 5 and 4 are cantilever beams. structure. In FIG. 5, the lower electrode 12 is located in the enclosed area of the insulating layer 24. When the upper electrode 10 returns to the position facing the lower electrode 12, it attracts and engages the lower electrode 12 to reduce the The area of the lower electrode 12 and the insulating pad 14 reduces the lateral pulling force received by the upper electrode 10.

As described above, the insulating pads 14 in FIGS. 4 and 5 are all cantilever beam structures, and the contact area and contact mode with the upper electrode 10 are adjusted structurally to achieve the effect of increasing friction and reducing impact. . Optionally, the insulating pad 14 may have a single-layer or multi-layer structure, or may be composed of a single material or multiple materials, and the part in contact with the upper electrode 10 is an insulating material.

For all the embodiments in FIGS. 1 to 5, in a specific implementation, the insulating pad 14 may also be located on the lower surface of the upper electrode 10, the insulating pad 14 is opposite to the lower electrode 12, and the insulating pad The area of the upper electrode 10 does not exceed the area of the lower surface of the upper electrode 10, and the insulating pad 14 separates the upper and lower electrodes 10, 12 from each other.

In a specific embodiment, the insulating pad 14 may also be located on the upper surface of the lower electrode 12, the insulating pad is opposite to the upper electrode 10, and the area covered by the insulating pad 14 is covered by the lower electrode 12. Depending on the area, the insulating pad 14 separates the upper and lower electrodes 10, 12.

In a specific embodiment, the insulating pad 14 may also be located on the opposite surfaces of the upper and lower electrodes 10, 12, respectively, wherein the area of the insulating pad on the lower surface of the upper electrode 10 does not exceed The area of the lower surface of the upper electrode 10 and the area of the insulating pad located on the upper surface of the lower electrode 12 are determined by the area of the lower electrode 12. The structure and material of the insulating pad are the same as those of the above-mentioned embodiment in FIGS. 2-5, and the insulating pad 14 isolates the upper and lower electrodes 10, 12.

In a specific embodiment, the cushion pads 18a, 18b are provided on the upper surface of the fixing portion 20b of the driver 20 corresponding to the lower edge of the lower surface of the CIS 1, or the cushion pads 18a, 18b are provided under the CIS 1. The buffer pads 18a, 18b are arranged on the surface. The cushioning pad is an insulating, deformable material with a large friction coefficient, such as a polymer resin. The cushioning pads 18a, 18b are used to relieve the impact between the CIS 1 and the driver during pull-in. The friction coefficient is large to reduce the lateral sliding between the CIS 1 and the driver when electrostatic attraction occurs. At the same time, the buffer pads 18a, 18b are made of insulating materials to prevent a short circuit caused by the direct contact between the CIS 1 and the driver 20 after the suction effect occurs. In order to ensure the coordination of motion of the optical image stabilizer 200-500, the height of the buffer pads 18a, 18b is the same as the height of the insulating pad 14 between the upper and lower electrodes 10, 12, and the CIS 1 is lowered The distance between the surface and the movable part 20a of the driver 20 is equal to the distance between the upper electrode 10 and the lower electrode 12, so as to ensure that the upper electrode 10 faces the substrate 22 under electrostatic force. The displacement generated by the movement is the same as the displacement from the lower surface of the CIS 1 to the movable part 20a of the driver 20, so that the structure of the optical image stabilizer 200-500 after suction is firm and reliable, and the overall impact resistance is improved. ability.

When an impact is about to occur, the principle of the upper and lower electrodes 10, 12 pull-in is described as follows:

As shown in FIG. 6, a constant voltage source is connected to the movable conductive electrode plate 601 and the conductive fixed electrode plate 602 through a conductive loop, and a potential difference V is formed between the two conductive electrode plates. This potential difference will form an electrostatic force F between the two conductive electrode plates. Ignoring the influence of inertia and damping, the movable conductive electrode plate 601 overcomes the elastic restoring force of the elastic connecting member 606 under the action of the electrostatic force F, and approaches the conductive fixed electrode plate 602 to generate displacement. When the potential difference V is constant and the displacement reaches a certain position, the movable conductive electrode plate 601 gets rid of the constraint of the elastic restoring force, and attracts the conductive fixed electrode plate 602, which is electrostatic attraction. When there is no electrostatic force between the two conductive electrode plates, the distance between the two conductive electrode plates 601 and 602 is g, then the electrostatic force is

In formula (1), A is the area of the electrode plate, and ε is the dielectric constant. It can be seen from formula (1) that, first, when the two conductive electrode plates are attracted, the distance between the plates g=0, and the corresponding electrostatic force F is infinite at this time. This ensures that the pull-in of the pole plate can remain stable under a large impact force. In addition, it can be seen from equation (1) that during the downward movement of the movable conductive plate 601, F increases as g decreases, that is, F is inversely proportional ^{to g 2.} At the same time, during the downward movement of the movable conductive electrode plate 601, the elastic force of the movable conductive electrode plate 601 by the elastic connector 606 is also increasing, and the increase of the elastic force is related to the distance g between the two conductive electrode plates. Into a linear change. According to theoretical calculations, when the movable conductive electrode plate 601 is pulled down to a position of 2/3 of the initial gap g, the increase speed of the electrostatic force is higher than the increase speed of the elastic force as the balance force. The voltage required at this time is

k is the spring coefficient of the overall system. Thereafter, even if the voltage is not increased, since the electrostatic force F that increases with the decrease of the gap g is still greater than the spring force, the movable conductive electrode plate 601 can continue to "autonomously" accelerate to approach the conductive fixed electrode plate 602, Until the two conductive electrode plates are drawn together, and the acceleration becomes larger and larger. Therefore, the time required for the electrostatic attraction is very short and does not depend on the increase in voltage. This ensures that the optical image stabilizer 100-500 provided by the present invention can quickly enter the protection form after determining that an impact is about to occur to prevent damage caused by the impact. 6 is an explanation of the principle of electrostatic attraction between the first and second electrodes of the optical image stabilizer shown in FIGS. 1-5. For example, the upper electrode 10 can be understood as a movable conductive electrode plate 601 or a conductive fixed electrode plate 602, correspondingly The lower electrode 12 can be understood as a conductive fixed electrode plate 602 or a movable conductive electrode plate 601, although the position of the elastic connecting member 606 is different from the position of the elastic connecting member in FIGS. 1-5. The principle of electrostatic attraction explained in FIG. 6 is applicable to various embodiments of the present invention.

According to the above-mentioned electrode attraction principle, as shown in FIG. 7(a), the optical image stabilizer 700 is in the non-energized state of the upper and lower electrodes, that is, in the normal working form of the optical image stabilizer, that is, no impact or impact At the end, no voltage is applied to the upper and lower electrodes 10, 12, and the upper electrode 10 is suspended on the lower electrode 12. As shown in FIG. 7(b), when the optical image stabilizer 700 is about to be impacted, the power supply applies voltage to the upper and lower electrodes 10, 12 through the upper and lower solder pads 26, 28. In the energized state, the upper and lower electrodes have opposite polarities, and the upper and lower electrodes 10, 12 are subjected to electrostatic force, and the carrying table 16 drives the upper electrode 10 and the CIS 1 to the substrate Moving in the direction 22, the carrying platform 16 where the upper electrode 10 is provided is attracted to the substrate 22 where the lower electrode 12 is provided, so that the upper electrode 10 and the lower electrode 12 are attracted to each other. When the carrier platform 16 drives the upper electrode 10 and the CIS 1 to move toward the substrate 22, the upper electrode and the lower electrode are separated by an insulating pad 14. Therefore, when the first and second electrodes are energized, that is, before the impact, the floating structure of the optical image stabilizer 700 disappears, and the optical image stabilizer 700 becomes a fixed structure as a whole to prevent damage caused by impact. The schematic structural diagrams of the first and second electrodes in the non-energized state and the energized state provided in FIG. 7 take the optical image stabilizer 100 in the embodiment shown in FIG. 1 as an example. Similarly, the structural schematic diagrams of the first and second electrodes in the non-energized state and the energized state provided in FIG. 7 can also be applied to the optical image stabilizer in the embodiment shown in FIGS. 2-5.

The drives 20 shown in FIGS. 1-5 can be three groups or more. For example, the carrying table 16 can be suspended (suspended) and mounted between at least three drivers 20 by means of elastic connectors 30, that is, the carrying table 16 is located in an area enclosed by at least three drivers 20, and the carrying table 16 drives the CIS 1 in The driver completes the translation and rotation in the plane where the imaging surface of the CIS 1 is located, thereby realizing the optical image stabilization function.

Figures 8 and 9 are schematic top views of different embodiments of the actuator of the actuation component of the optical image stabilizer provided by the application

FIG. 8 is a top view of the optical image stabilizer 800. The actuating component 60 of this embodiment has four groups of electrostatic actuators, and two groups are arranged along the X axis and the Y axis, namely, the driver X1 and the driver X2; the driver Y1, Drive Y2. The electrostatic driver is composed of a driver fixed part 20b and a driver movable part 20a. The driver fixing part 20b is actually a part of the fixing part of the actuating member 60 and is connected to the base 22 through the insulating layer 24. The movable portion 20 a of the driver is connected to the carrying platform 16 through the elastic connecting member 30. The position of the connection deviates from the center of rotation of the carrying platform 16, in this embodiment, on the four corners of the carrying platform 16. The elastic connecting member 30 provides cantilever support for the movable portion 20a of the driver. The elastic connecting member 30 also provides cantilever support for the bearing platform 16. In addition, after the driving force of the driver 20 is removed, the elastic deformation of the elastic connecting member 30 provides an elastic restoring force, so that the bearing platform 16 returns to the intermediate position.

In a specific embodiment, as shown in FIG. 8, each group of the driver fixed part 20b and the driver movable part 20a are provided with finger electrodes that cooperate with each other to form an electrostatic comb structure. When a voltage is applied to the electrostatic comb-tooth structure, due to the action of electrostatic force, the movable end of the movable part 20 a of the driver moves in a specified direction, and the carrying platform 16 is pushed through the elastic connecting member 30. The four sets of actuators 20 of the actuating component 60 of this embodiment enable the movable stage to realize translation and rotation in the plane where the imaging surface of the CIS 1 is located through the cooperation of the force application direction. The elastic connecting member 30 and the carrying platform 16 in the same axial direction shown in FIG. 8 are a cross-sectional view of the elastic connecting member 30 and the carrying platform 16 in FIGS. 2-5. That is, the upper electrode 10 is arranged below the carrying platform 16, and the upper electrode is fixedly connected to the CIS 1, that is, the CIS 1 is carried on the upper side. The bottom electrode 12 is provided on the base of the actuating component 60, and the insulating pad 14 is on the bottom electrode 12 or on the top electrode 10. When the upper and lower electrodes of the optical image stabilizer 800 are not energized, that is, in the normal working form of the optical image stabilizer, that is, when there is no impact or the impact has ended, no voltage is applied to the upper and lower electrodes 10, 12, the upper electrode 10 is suspended above the lower electrode 12. When the upper and lower electrodes are not energized, that is, in the normal working form of the optical image stabilizer, the electrostatic driver 20 of the actuating member 60 actively pushes the carrier 16 to drive the CIS 1 to perform directional and quantitative movement , Compensate the imaging shaking caused by the shaking of the camera module of the electronic equipment. The actuating component 60 can drive the CIS 1 to complete translation and rotation in the plane where the imaging surface of the CIS 1 is located, thereby realizing the optical image anti-shake function. When the upper and lower electrodes are energized, that is, when an impact is about to occur, one situation is that the driving force of the actuating member 60 on the carrier 16 remains unchanged, that is, the carrier 16 is on the imaging surface of the CIS 1 The position in the plane does not change due to the additional driving force of the actuating member 60. The power supply applies voltage to the upper and lower electrodes 10, 12 through the solder pads 26, 28, and the upper Under the electrostatic force of the lower electrodes 10 and 12, the upper electrode drives the CIS 1 to move toward the substrate 22, so that the upper electrode 10 and the lower electrode 12 are attracted to each other. Another situation is that when the upper and lower electrodes are energized, that is, when an impact is about to occur, the actuating member 60 exerts an additional driving force on the bearing platform 16, so that the bearing platform 16 is on the elastic connecting member. After returning to the position aligned with the lower electrode 12 under the action of the restoring force and the driving force, the power supply applies a voltage to the upper and lower electrodes 10, 12 through the solder pads 26, 28, and the upper and lower electrodes Under the action of the electrostatic force of the electrodes 10 and 12, the upper electrode 12 drives the CIS 1 to move toward the substrate 22, so that the upper electrode 10 and the insulating pad 14 are attracted to each other. When the carrying table 16 and the upper electrode 10 are returned to the alignment position and then subjected to electrostatic force, the size of the lower electrode 12 can be reduced to the same size as the upper electrode 10, and the upper electrode 10 can be reduced at the same time. The lateral tension received.

In a specific embodiment, as shown in FIG. 9, it is another top view of the actuator of the actuating component 60 of the optical image stabilizer. The actuating component 60 of this embodiment has three groups of electrostatic actuators 20, When the shape of the carrying platform 16 is triangular, three actuators 20 can be used. The three actuators 20 are distributed in the shape of a regular triangle on the base 22 to form a triangular area. The three vertices of the carrying platform 16 pass through The connecting piece 30 is suspended and fixed on each driver 20. Similarly, in the non-energized state and the energized state of the upper and lower electrodes, the driving force of the actuating member 60 of the three sets of electrostatic drivers to the carrier is the same as the driving force of the actuating members 60 of the above four sets of electrostatic drivers to the carrier. . The other parts are similar to Fig. 8 and will not be repeated here.

Referring to FIG. 10, the present application also provides an embodiment of an optical image stabilizer system. The optical image stabilizer system 1010 includes a sensor 1011, a processor 1012, an optical image stabilizer 1013, and a power supply 1014. The optical image stabilizer 1013 can be implemented by any optical image stabilizer of the foregoing embodiments.

The sensor 1011 includes one or more of an acceleration sensor, a gyroscope sensor, a CIS sensor, and a light sensor. Wherein, the acceleration sensor provides three-axis acceleration of the electronic device to determine whether one-axis acceleration is equal to or greater than a gravitational acceleration; if so, the electronic device may be about to encounter an impact. Wherein, the gyroscope sensor provides the attitude angular velocity of the three axes of the electronic device, and determines whether the electronic device is in a continuously rolling state; if so, the electronic device may be about to encounter an impact. The CIS provides an image change rate. If the image received by the CIS changes rapidly, the electronic device may be about to encounter an impact. Wherein, the light sensor provides a change in light intensity. If the light intensity changes rapidly, that is, the electronic device is in a constantly rolling state, it may be about to encounter an impact. The sensor transmits the collected single or comprehensive data (such as the spatial information of the electronic device) to the processor, and the processor is responsible for judging the impending impact according to the data collected by the sensor and the preset threshold value Or at the end of the impact, the driver is then controlled to perform corresponding actions. In the embodiment of the present invention, the preset threshold may be preset by a built-in program of the optical image stabilizer system, or the preset threshold may also be set by the user. The built-in program of the optical image stabilizer system 1010 may be a predetermined program, or the user's habits of using the system may be learned through machine learning.

When one or more of acceleration, attitude angular velocity, image change rate, and light and dark change speed monitored by the sensor 1011 in real time does not exceed the preset threshold, it indicates that the optical image stabilizer system 1010 is on the upper and lower electrodes. In the power-on state, that is, the optical image stabilizer system is not in an impact state or the impact has ended, the sensor 1011 continuously monitors real-time changes in the above-mentioned signal. In this embodiment, the sensor 1011 may be one or more types, and the data obtained by comprehensive monitoring of multiple sensors is more reliable, and the accuracy of the impact judgment is higher. When comprehensively detecting the data of the various sensors, the processor 1012 performs weight calculation on the data analysis of the above-mentioned sensors to obtain the final judgment result. The coefficient of weight comes from the drop test. In addition, the processor 1012 can also make comprehensive judgments based on artificial intelligence on the data analysis of the above sensors. The learning basis of artificial intelligence comes from the drop test. The sensor 1011 may be specially provided for the optical image stabilizer 1013 or shared with other modules of the electronic device. The monitoring of the impact by the sensor 1011 is allocated according to the priority set by the processor 1012 or the user.

When it is judged that an impact is about to occur, the processor 1012 sends an instruction to the driver 20 of the optical image stabilizer 1013. The optical image stabilizer 1013 enters the energized state from the upper and lower electrodes 10, 12 from the non-energized state, that is, the optical image stabilizer 1013. The image stabilizer enters the anti-shock form from the normal working mode; when it is judged that the impact has ended, it sends an instruction to the driver, and the upper and lower electrodes 10, 12 of the optical image stabilizer 1013 recover from the energized state to the non-energized state, That is, the optical image stabilizer 1013 recovers from the impact-resistant form to the normal working form. That is, in the normal working state of the optical image stabilizer, no voltage is applied to the upper and lower electrodes 10, 12, and the upper electrode is suspended above the lower electrode. In the normal working form of the optical image stabilizer, that is, when the upper and lower electrodes are not energized, the driver of the actuating component of the optical image stabilizer 1013 actively pushes the carrier to drive the CIS to perform directional and quantitative movement to compensate Imaging shaking caused by the shaking of the camera module 1000 of the electronic device. The actuating component 60 can drive the CIS to complete the translation and rotation in the plane where the imaging surface of the CIS 1 is located, thereby realizing the image anti-shake function. When the optical image stabilizer 1013 is on the upper and lower electrodes, that is, when an impact is about to occur, one situation is that the driving force of the actuating member on the carrier remains unchanged, that is, the carrier is in the XY position. There is no displacement change on the plane due to the additional driving force of the actuating member. The power supply 1014 applies a voltage to the upper and lower electrodes through the solder pads. The upper and lower electrodes drive the CIS to move toward the substrate under the action of electrostatic force, so that the The upper electrode is attracted to the lower electrode. In another case, the actuating member exerts additional driving force on the carrying table, so that the carrying table returns to the position directly opposite to the lower electrode under the action of the spring restoring force and the driving force, and the power supply The device applies voltage to the upper and lower electrodes through the soldering pads. Under the action of electrostatic force on the upper and lower electrodes, the upper electrode drives the CIS to move toward the substrate, so that the upper electrode and the When the lower electrode is attracted to each other, the CIS carried by the carrier is in a non-suspended state, the suspended structure of the optical image stabilizer 1013 disappears, and the CIS and the substrate form a stable structure to resist impact.

The sensor 1011, the processor 1012, and the optical image stabilizer 1013 in the optical image stabilizer system 1010 may be integrated into one processing module, or may be separate physical units, or Two or more units are integrated in one module. Each of the above modules can be implemented in the form of hardware or software function. If it is implemented in the form of software functions, the corresponding program commands are stored in the medium provided by the present invention.

Figure 11 is a schematic flow chart of an optical image stabilizer system control method provided by an embodiment of the present application. The process can be based on the optical image stabilizer shown in Figures 3-4 and 8-9 and the optical image stabilizer shown in Figure 10 The method can be implemented by the processor in FIG. 10, including but not limited to the following steps:

Step S1101: Receive sensor signals.

Specifically, when the optical image stabilizer is in a state where the upper and lower electrodes are not energized, that is, when the optical image stabilizer is in normal working mode, no voltage is applied between the upper and lower electrodes 10, 12, that is, the optical image The stabilizer is in normal working form, refer to Figure 7(a). When the upper and lower electrodes are not energized, that is, in the normal working form of the optical image stabilizer, the driver 20 of the actuating component 60 actively pushes the carrying table 16 to drive the CIS 1 to perform directional and quantitative movement to compensate for Imaging shaking caused by the shaking of the camera module of the electronic device. The actuating component 60 can drive the CIS 1 to complete translation and rotation in the plane where the imaging surface of the CIS 1 is located, thereby realizing the image anti-shake function. The processor receives the signal monitored by the sensor, and the sensor monitors the working form of the electronic device in real time. The monitored signal can be one or more, such as acceleration, attitude angular velocity, image change rate, and light and dark change speed.

In the embodiment of the present invention, acceleration, attitude angular velocity, image change rate, or light and dark change speed can be obtained through different methods, for example, through the accelerometer, the gyroscope, the CIS 1, the light sensor Monitoring the acceleration, attitude angular velocity, image change rate, or light and dark change speed of the optical image stabilizer system, without limitation.

Step S1102: Determine whether the sensor signal exceeds a preset threshold.

Specifically, the processor analyzes the obtained monitoring data and makes a judgment according to a preset threshold. When the judgment result does not exceed the threshold, that is, there is no risk of impact, the optical image stabilizer is in the upper and lower electrode non-energized state, that is, the optical image stabilizer is in a normal working state, and the processor continuously receives the monitoring signal from the sensor , The sensor continues to monitor the working form of electronic equipment.

Step S1103: Apply a pull-in voltage, and the upper and lower electrodes pull in and enter the shock-resistant form.

Specifically, when the judgment result is that the threshold is exceeded, that is, when an impact is about to occur, the power supply applies the selected pull-in voltage, the upper and lower electrodes pull in, and the optical image stabilizer enters the upper and lower electrodes energized state , That is, the optical image stabilizer enters the anti-impact form to accept the shock.

Step S1104: Accept the impact.

Specifically, when the impact comes, since the optical image stabilizer has no floating structure, the probability of damage is reduced. In addition, since the magnitude of the electrostatic force is inversely proportional to the distance between the upper and lower electrodes, the stability of the suspension structure is improved after attracting, and the attracting force is large, and there is no secondary impact caused by rebound.

Step S1105: End of impact?

Specifically, the comprehensive monitoring continuously monitors whether the impact is over. If the impact is not over yet, for example, when the electronic device is continuously flipped and dropped on the stairs, the optical image stabilizer still maintains an anti-impact form, that is, the pull-in voltage is applied and the upper and lower electrodes absorb Together.

Step S1106: Release the pull-in voltage, and the upper and lower electrodes return to a non-energized state.

Specifically, when the impact is over, the pull-in voltage is released, the upper and lower electrodes return to a non-energized state, and the bearing platform drives the CIS and the lower electrode under the action of the elastic restoring force of the elastic connecting member. The vertical distance returns to the initial value, the bearing platform carrying the CIS is in a suspended state, and the optical image stabilizer returns to its normal working form.

In a specific real-time example, as shown in FIG. 11, when the judgment result is that the threshold is exceeded, that is, when an impact is about to occur, the carrying platform maintains its current position, and the power supply applies the selected pull-in voltage , The upper and lower electrodes 10 and 12 are pulled together to enter the state where the upper and lower electrodes are energized, that is, the optical image stabilizer's anti-impact form to receive shocks.

In a specific embodiment, as shown in FIG. 12, FIG. 12 is a schematic flow chart of another optical image stabilizer system control method provided by an embodiment of the present application. The flow may be based on the optical image stabilizer system shown in FIGS. 1-9. The image stabilizer and the optical image stabilizer system shown in Figure 10 are implemented. Different from the optical image stabilizer system control method shown in FIG. 11, the optical image stabilizer system control method shown in FIG. 12, after "step S1202: determining whether the sensor signal exceeds a preset threshold", if the sensor signal exceeds the preset threshold Set the threshold value, first go to "Step S1203: The bearing table moves back to the alignment position with the second electrode under the action of the spring restoring force and the driving force", and then implement "Step S1204: Apply a pull-in voltage, and the upper and lower electrodes pull in , Enter the anti-impact state ""

Specifically, when the judgment result is that the threshold is exceeded, that is, when an impact is about to occur, after the bearing platform returns to the position aligned with the lower electrode under the action of the spring restoring force and the driving force of the actuating member, the The power supply applies a selected pull-in voltage to the upper and lower electrodes, and the upper and lower electrodes pull together under the action of electrostatic force and enter the shock-resistant form to receive the shock.

In the foregoing various embodiments, the compensation displacement is to compensate for the displacement of the lens group 180 when the lens group 180 is shaking. The shaking of the lens group 180 is generally left and right shaking, and the compensation displacement is also located at the same position as the lens group 180. The optical axis is roughly perpendicular to the plane. The plane substantially perpendicular to the optical axis refers to a plane whose included angle with the optical axis is a right angle or an acute angle less than 45 degrees or an obtuse angle greater than 135 degrees. The compensation displacement is generally a displacement in a direction substantially perpendicular to the optical axis of the lens group 180. The substantially perpendicular means that the angle between the straight line on which the direction of displacement is located and the straight line on which the optical axis is located is a right angle or an acute angle less than 45 degrees or an obtuse angle greater than 135 degrees.

In the various embodiments described above, the "right position" means that the actuating component does not exert any force on the bearing platform, nor does it produce any compensation displacement. The carrying platform and the CIS are relatively stationary with respect to the base of the actuating component and the lower electrode plate, and the geometric center of the carrying platform coincides with the main optical axis of the mirror group.

In the various embodiments described above, the "current position" means that the force of the actuating component currently received by the bearing platform remains unchanged, and the current compensation displacement also remains unchanged.

In the various embodiments described above, the "non-energized state" means that the optical image stabilizer is in the "normal working mode", that is, in the non-impact state or when the impact ends, no voltage is applied to the optical image stabilizer. The lower electrode, the upper electrode is suspended on the lower electrode.

In the various embodiments described above, the “energized state” means that the CIS is about to be impacted or impacted, that is, the optical image stabilizer is about to enter the “impact-resistant state”.

The "fixed connection" in the foregoing embodiments means that after two parts are connected together, no relative displacement occurs. The electronic device can be a wearable device, a vehicle-mounted terminal, a personal mobile terminal, a personal computer, a multimedia player, an e-reader, a smart home device, or a robot. The personal mobile terminal may also be a smart phone or a tablet computer. The wearable device may also be a smart bracelet, or a smart medical device, or a head-mounted terminal. The head-mounted terminal device may be a virtual reality or an augmented reality terminal, for example, Google glasses. The smart medical device may be a smart blood pressure measurement device, or a smart blood glucose measurement device, or the like. The smart home equipment may be a smart access control system or the like. The robot may be various other electronic devices with photo or video functions.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying The device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.

Claims (25)

1. An optical image stabilizer, which is characterized by comprising: an image sensor and an actuating component, wherein:

   The actuating component includes a carrying platform, a substrate, a first electrode, and a second electrode;

   The carrying table carries the image sensor, the carrying table is provided with the first electrode on the surface facing the substrate, and the substrate is provided with the second electrode on the surface facing the carrying table;

   When the first electrode and the second electrode are in a non-energized state, the image sensor carried by the carrier is in a suspended state;

   When the first electrode and the second electrode are in a energized state, the carrying table on which the first electrode is arranged is attracted to the substrate on which the second electrode is arranged, and the carrying table carries the The image sensor is in a non-floating state.
2. The stabilizer according to claim 1, wherein when the carrier where the first electrode is provided is attracted to the substrate where the second electrode is provided, the first electrode and the second electrode They are separated by insulating pads.
3. The stabilizer according to claim 2, wherein the insulating pad is located on the first electrode or on the second electrode.
4. The stabilizer according to claim 2 or 3, wherein the insulating pad is a cantilever beam structure.
5. The stabilizer according to any one of claims 2 to 4, wherein the insulating pad is made of an elastic insulating material, and when the carrier where the first electrode is provided and the carrier where the second electrode is provided When the substrate is sucked in, the insulating pad made of the elastic material relieves the impact force of the second electrode moving toward the first electrode.
6. The stabilizer according to any one of claims 1-5, wherein the second electrode covers the orthographic projection of the first electrode.
7. The stabilizer according to any one of claims 1 to 5, wherein the second electrode covers all areas of the orthographic projection of the active range of the first electrode.
8. The stabilizer according to any one of claims 1-7, wherein the actuating member further comprises an elastic connecting member and a driver, wherein: the elastic connecting member is connected to the bearing platform; the driver is connected to the The base and the elastic connecting piece, and the driver drives the carrying table to move through the elastic connecting piece.
9. The stabilizer according to claim 8, wherein the driver includes a movable part and a fixed part, the fixed part of the driver is connected with the base, and the movable part of the driver is connected with the elastic connecting member;

   The movable part of the driver drives the bearing platform to move through the elastic connecting member.
10. The stabilizer according to claim 8 or 9, characterized in that there are three or more sets of the drivers, and the image sensor carried by the carrier is suspended in the space enclosed by the drivers.
11. The stabilizer according to claim 8 or 9, wherein the movable part of the driver drives the image sensor to translate and rotate in the plane where the imaging surface of the image sensor is located through the carrier platform.
12. The stabilizer according to any one of claims 8-11, wherein the driver is an electrostatic driver, the fixed part of the electrostatic driver and the movable part of the electrostatic driver are respectively provided with finger electrodes, and the electrostatic The finger electrodes on the fixed part of the driver and the finger electrodes on the movable part of the electrostatic driver cooperate with each other to form an electrostatic comb structure.
13. The stabilizer according to any one of claims 1-12, wherein under the action of the electrostatic force between the first electrode and the second electrode, the carrying platform and The substrate provided with the second electrode is sucked in.
14. The stabilizer according to claim 13, characterized in that, under the action of the electrostatic force, the first electrode drives the image sensor to the direction of the substrate where the second electrode is provided through the carrier. movement.
15. The stabilizer according to claim 13, wherein the magnitude of the electrostatic force is inversely proportional to the distance between the first electrode and the second electrode.
16. An optical image stabilizer system, characterized in that the system is applied to electronic equipment, and comprises a sensor, a processor, and the stabilizer according to any one of claims 1-15, wherein:

    The sensor is used to collect spatial information of electronic equipment;

    The processor is configured to determine whether the spatial information collected by the sensor exceeds a preset threshold, and when the spatial information does not exceed the preset threshold, control the first and second electrodes of the stabilizer to work at the A non-energized state; when the sensor signal exceeds the preset threshold, the first and second electrodes of the stabilizer are controlled to work in the energized state.
17. The stabilizer system according to claim 16, wherein the sensor includes at least one of an acceleration sensor, a gyroscope sensor, a light sensor, and the image sensor, and the sensor collecting spatial information of an electronic device includes: The acceleration sensor collects the axial acceleration of the electronic device, the gyroscope sensor collects the posture angular velocity of the electronic device, the image sensor collects the image change rate, and the light sensor collects the change rate of light and darkness.
18. The stabilizer system according to claim 17, wherein when the sensor signal exceeds the preset threshold, the processor adjusts the voltage between the first electrode and the second electrode of the stabilizer, Controlling the electrostatic force between the first electrode and the second electrode of the stabilizer based on the voltage, so that the carrying table provided with the first electrode is attracted to the substrate provided with the second electrode, Thereby the image sensor is stabilized.
19. The stabilizer system of claim 18, wherein the magnitude of the electrostatic force is inversely proportional to the distance between the first electrode and the second electrode.
20. A camera module, wherein the camera module includes a lens group, a lens barrel, and the optical image stabilizer according to any one of claims 1-17, wherein the lens barrel accommodates the lens group and the optical image stabilizer. In the optical image stabilizer, the optical image stabilizer is located below the lens group, and the imaging light beam passes through the lens group and forms an image on the image sensor.
21. A control method of an optical image stabilizer, characterized in that the control method includes:

    Receive sensor signals;

    Determine whether the sensor signal exceeds a preset threshold;

    When the sensor signal exceeds the preset threshold value, the voltage between the first electrode and the second electrode of the optical image stabilizer is controlled so that the carrier where the first electrode is set is the same as that where the second electrode is set. The base of the electrode is attracted to stabilize the image sensor carried by the carrier.
22. The control method according to claim 21, wherein the sensor signal comprises at least one of the axial acceleration of the electronic device, the posture angular velocity of the electronic device, the image change rate and the change rate of light and dark.
23. The control method according to claim 21 or 22, characterized in that, under the action of the electrostatic force between the first electrode and the second electrode, the carrier where the first electrode is provided and the setting station When the substrate of the second electrode is attracted, the magnitude of the electrostatic force is inversely proportional to the distance between the first electrode and the second electrode.
24. The control method according to any one of claims 21-23, wherein the method further comprises:

    The voltage between the first electrode and the second electrode is released, so that the image sensor carried by the carrying table is restored to a suspended state under the action of the elastic restoring force of the elastic connector.
25. A computer-readable storage medium having a computer program stored thereon, wherein the program is executed by a processor to realize the control method according to any one of claims 21-24.

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