WO2023185084A1 - 摄像头模组及电子设备 - Google Patents

摄像头模组及电子设备 Download PDF

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Publication number
WO2023185084A1
WO2023185084A1 PCT/CN2022/137745 CN2022137745W WO2023185084A1 WO 2023185084 A1 WO2023185084 A1 WO 2023185084A1 CN 2022137745 W CN2022137745 W CN 2022137745W WO 2023185084 A1 WO2023185084 A1 WO 2023185084A1
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WO
WIPO (PCT)
Prior art keywords
camera module
lens barrel
mounting base
piezoelectric
module according
Prior art date
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PCT/CN2022/137745
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English (en)
French (fr)
Inventor
陈伟
何雨航
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2023185084A1 publication Critical patent/WO2023185084A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B11/00—Filters or other obturators specially adapted for photographic purposes
    • G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

Definitions

  • This application relates to the technical field of camera modules, and in particular to a camera module and electronic equipment.
  • Camera modules of electronic devices such as mobile phones and tablets are generally equipped with voice coil motors.
  • the voice coil motor is used to drive the movement of the lens group in the camera module to achieve the focus or anti-shake function of the camera module.
  • Traditional voice coil motors are generally electromagnetic.
  • the accuracy and stroke of their anti-shake performance are greatly limited by analog-to-digital conversion/digital-to-analog conversion (ADC/DAC), making it difficult to achieve high-precision and large-stroke anti-shake requirements at the same time.
  • ADC/DAC analog-to-digital conversion/digital-to-analog conversion
  • a camera module and an electronic device are provided.
  • the present application provides a camera module, including a mounting base, a lens barrel and a piezoelectric component.
  • the lens barrel and the piezoelectric component are respectively connected to the mounting base.
  • the piezoelectric component is used in a single Movement in the first direction and the second direction is generated under the action of the electrical signal to drive the lens barrel to move relative to the mounting base and achieve optical anti-shake of the camera module.
  • the present application provides a camera module, including a mounting base, a lens barrel, a spring piece, and a piezoelectric component.
  • the lens barrel is connected to the mounting base through the spring sheet, and the piezoelectric component is connected to the mounting base.
  • the mounting base, the piezoelectric component is used to generate movement in the first direction and the second direction under the action of a single electrical signal, so that the lens barrel moves relative to the mounting base, wherein the first direction and the second direction are both consistent with the mounting base.
  • the optical axis of the lens tube is vertical.
  • the present application provides an electronic device, including a housing and the above-mentioned camera module, and the camera module is provided in the housing.
  • Figure 1 is a schematic diagram of an electronic device according to an embodiment
  • Figure 2 is a schematic diagram of a camera module according to an embodiment
  • Figure 3 is a schematic diagram of a camera module according to another embodiment
  • Figure 4 is a schematic diagram of the relative positions of the piezoelectric components, rolling elements, position sensors, lens barrel and mounting base of the camera module according to an embodiment
  • FIG. 5 is a schematic diagram of a module structure of an electronic device according to an embodiment.
  • electronic equipment refers to devices that are capable of receiving and/or sending communication signals, including but not limited to, connected via any one or more of the following connection methods:
  • An electronic device configured to communicate via a wireless interface may be referred to as a "mobile terminal".
  • mobile terminals include, but are not limited to, the following electronic devices:
  • Satellite phone or cellular phone (1) Satellite phone or cellular phone
  • PCS Personal Communications System
  • the electronic device 10 is a smartphone.
  • the electronic device 10 includes a housing 11 and a camera module 12 .
  • the camera module 12 is connected to the housing 11 .
  • the camera module 12 can be used to implement shooting functions, such as close-up and distant shots, and video calls.
  • the electronic device 10 includes a display screen (not shown), which can be used to display images and provide an interactive interface for a user.
  • the camera module 12 is used to achieve rear-facing shooting, that is, the light-incoming side of the camera module 12 is located on the back of the display surface of the display screen; in other embodiments, the camera module 12 can be used to achieve front-facing shooting.
  • the light entrance side of the camera module 12 is located on the same side as the display surface of the display screen.
  • the electronic device 10 may be, but is not limited to, a tablet computer, a notebook, a palmtop computer, and other devices.
  • the camera module 12 includes a mounting base 121, a lens barrel 122 and a piezoelectric component 123.
  • the mounting base 121 is used to carry the lens barrel 122 and the piezoelectric component 123.
  • the lens barrel 122, the piezoelectric component 123 123 are respectively connected to the mounting base 121, and a lens or lens group for condensing light is installed in the lens barrel 122.
  • the piezoelectric element 123 is used to generate movement in the first direction and the second direction under the action of a single electrical signal to drive the lens barrel 122 to move relative to the mounting base 121 and achieve optical anti-shake of the camera module 12 .
  • the mounting base 121 may include a base 1211 and a bracket 1213 connected to the base 1211.
  • the lens barrel 122 and the piezoelectric component 123 are respectively connected to the bracket 1213.
  • the camera module 12 may also include a filter 124, an image sensor 125, and a circuit board 126.
  • the filter 124 is connected to the base 1211 and is used to filter infrared light to improve the shooting quality of the camera module 12 .
  • the filter 124 is located between the lens barrel 122 and the image sensor 125 .
  • the image sensor 125 is connected to the circuit board 126, and the circuit board 126 is connected to the base 1211.
  • the circuit board 126 can be used to electrically connect to an external circuit, such as the motherboard of a mobile phone, to realize the communication connection between the camera module 12 and the motherboard.
  • the piezoelectric component 123 may include a piezoelectric body 1231 and a friction head 1233 connected to the piezoelectric body 1231 .
  • the piezoelectric body 1231 is connected to the bracket 1213 of the mounting base 121 .
  • the friction head 1233 abuts against the lens barrel 122 .
  • the piezoelectric body 1231 is used to generate movement in the first direction and the second direction under the action of a single electrical signal to drive the friction head 1233 to move, and then drive the lens barrel 122 to move relative to the mounting base 121 through the friction head 1233 to realize the camera module 12 optical image stabilization.
  • the friction head 1233 can be made of materials with a relatively large friction coefficient, such as silicone, rubber, etc., to increase the friction between the friction head 1233 and the lens barrel 122 and prevent slipping between the lens barrel 122 and the piezoelectric element 123 .
  • the camera module 12 generally uses an electromagnetic voice coil motor to achieve focusing and anti-shake functions, and the current and stroke of the voice coil motor have a corresponding relationship.
  • the greater the stroke of the lens barrel 122 or the lens the greater the required driving current; the higher the current accuracy, the higher the minimum driving accuracy.
  • a 10-bit driver IC Integrated Circuit
  • the voice coil motor stroke is 1mm
  • the corresponding maximum current is 1000mA
  • the minimum driving accuracy is 1um
  • a 10-bit driver IC Integrated Circuit
  • 11bit and 12bit driver ICs are generally required for control.
  • the maximum drive current will increase, resulting in an increase in power consumption of the camera module 12, and a corresponding increase in ADC/DAC accuracy, which will greatly increase the cost and size of the drive IC.
  • the piezoelectric body 1231 is a resonant piezoelectric body, which can drive the friction head 1233 to perform elliptical motion when driven by a certain sine wave voltage, thereby driving the lens barrel 122 to move relative to the mounting base 121 . Since the displacement of each elliptical movement of the piezoelectric body 1231 is extremely small, generally at the nanometer level, the sub-micron level displacement of the lens barrel 122 can be easily achieved by adjusting the number of cycles of the sine wave voltage control signal.
  • the movement stroke of the piezoelectric body 1231 is positively correlated with the number of cycles of the sine wave voltage control signal, when it is necessary to achieve a long stroke movement of the lens barrel 122, the large stroke movement of the lens barrel 122 can be achieved without increasing the maximum control current. The power consumption of the camera module 12 and the electronic device 10 can be effectively reduced.
  • the lens barrel 122 has an optical axis 12a, and the first direction and the second direction are orthogonal to the optical axis 12a.
  • the piezoelectric body 1231 in the embodiment of the present application can generate the X axis direction and the Y axis under the action of a single electrical signal.
  • the movement in the direction drives the friction head 1233 to move.
  • Piezoelectric modules in related technologies generally can only drive the lens barrel 122 to move in one direction (for example, the X direction), while optical anti-shake solutions generally need to control the displacement of the lens barrel 122 in two orthogonal directions, X and Y. Therefore, Generally, more than 2 piezoelectric modules need to be installed.
  • the piezoelectric element 123 in the embodiment of the present application can move in two directions (X-axis, Y-axis) at the same time under the action of a single electrical signal, which can effectively simplify the driving structure of the optical anti-shake.
  • one electrical signal is generally used to drive the piezoelectric module to deform in the X direction
  • another electrical signal is used to drive the piezoelectric module to deform in the Y direction.
  • the piezoelectric module can be synthesized
  • the elliptical motion drives the lens barrel 122 to move.
  • This structural arrangement puts forward higher requirements for the synchronization of the two electrical signals.
  • a single electrical signal can be used to realize the deformation of the piezoelectric element 123 in the first direction and the second direction. For example, with reference to FIG.
  • the piezoelectric body 1231 is generally in the shape of a rectangular block, the friction head 1233 overlaps the piezoelectric body 1231 in the Z-axis direction, and on two sides of the piezoelectric body 1231 , for example
  • the piezoelectric body 1231 can be driven to deform in the X and Y directions and synthesize an elliptical motion, and then drive the lens barrel 122 to move through the friction head 1233.
  • two terminals of a single electrical signal can also be applied to the side parallel to XOZ and the side parallel to XOY respectively to drive the camera module 12 to move in the Z direction and the Y direction. This is not the case here. Again.
  • the camera module 12 includes a rolling body 127.
  • the bracket 1213 of the mounting base 121 has a limiting groove 121a.
  • the rolling body 127 resists the lens barrel 122 and is rollably disposed on the limiting groove 121a.
  • the rolling element 127 can be a ball or a roller. When the lens barrel 122 is driven to move, the rolling element 127 can rotate relative to the lens barrel 122 to reduce the displacement resistance of the lens barrel 122 and improve the efficiency of optical anti-shake control. responding speed.
  • piezoelectric elements 123 and rolling elements 127 are provided in both the first direction and the second direction, and the piezoelectric elements 1231 and rolling elements 127 arranged in the first direction are respectively located on opposite sides of the lens barrel 122 , the piezoelectric body 1231 and the rolling body 127 arranged in the second direction are respectively located on opposite sides of the lens barrel 122 .
  • the piezoelectric element 123 in the first direction and the piezoelectric element 123 in the second direction can work together.
  • the piezoelectric element 123 in the first direction and the piezoelectric element 123 in the second direction can work at the same time to adjust the lens barrel 122 in the third direction. The position of the first and second directions to improve control accuracy and response speed.
  • the camera module 12 may also include a pretensioner 128, which is connected to the mounting base 121 and the lens barrel 122, so that the lens barrel 122 presses the friction head 1233 and Rolling elements 127.
  • the pretensioner 128 is a spring piece. After the elastic piece is assembled with the bracket 1213 of the mounting base 121 and the lens barrel 122, a preload force can be applied to the lens barrel 122 in the direction of the optical axis 12a (Z-axis), so that the lens barrel 122 presses against the friction head 1233 and the rolling element 127. This ensures the positional accuracy of the lens barrel 122 , for example, maintaining the vertical relationship between the optical axis 12 a and the image sensor 125 , and ensuring the normal operation of the piezoelectric element 123 .
  • the camera module 12 may also include a position sensor 129.
  • the position sensor 129 includes a magnet 1291 and a magnetic induction chip 1293.
  • One of the magnet 1291 and the magnetic induction chip 1293 is connected to the bracket 1213 of the mounting base 121, and the other is connected to on the lens barrel 122 for detecting the displacement of the lens barrel 122 relative to the mounting base 121 .
  • the position sensor 129 including the magnet 1291 and the magnetic induction chip 1293 is a type of Hall sensor, which can use changes in the magnetic field to determine the displacement between two objects, and can achieve higher control accuracy.
  • the optical anti-shake of the camera module 12 can form a closed-loop control. That is, after the position sensor 129 feeds back the displacement of the lens barrel 122 relative to the bracket 1213, the control accuracy of the optical anti-shake can be further improved.
  • the camera module 12 may include more than two position sensors 129 , and the two or more position sensors 129 are arranged around the lens barrel 122 .
  • one position sensor 129 is disposed in the first direction and between the piezoelectric element 123 and the lens barrel 122 in the first direction
  • the other position sensor 129 is disposed in the second direction.
  • this arrangement can improve the position control accuracy of the lens barrel 122 in the first direction and the second direction.
  • another position sensor 129 can be disposed between the rolling element 127 in the first direction and the rolling element 127 in the second direction to further improve the position control accuracy of the lens barrel 122.
  • FIG. 5 shows the module structure of the electronic device 10 .
  • the electronic device 10 may include a radio frequency (RF, Radio Frequency) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless fidelity ( WiFi (Wireless Fidelity) module 507 includes a processor 508 with one or more processing cores, a power supply 509 and other components.
  • RF Radio Frequency
  • the radio frequency circuit 501 can be used to send and receive information, or to receive and send signals during a call. In particular, after receiving downlink information from the base station, it is handed over to one or more processors 508 for processing; in addition, uplink-related data is sent to the base station. .
  • the radio frequency circuit 501 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a low noise amplifier (LNA, Low Noise Amplifier), duplexer, etc.
  • SIM Subscriber Identity Module
  • the radio frequency circuit 501 can also communicate with networks and other devices through wireless communications.
  • the wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM, Global System of Mobile communication), General Packet Radio Service (GPRS, General Packet Radio Service), Code Division Multiple Access (CDMA, Code Division Multiple Access), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), Long Term Evolution (LTE, Long Term Evolution), email, Short Messaging Service (SMS, Short Messaging Service), etc.
  • GSM Global System of Mobile communication
  • GPRS General Packet Radio Service
  • GPRS General Packet Radio Service
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • SMS Short Messaging Service
  • Memory 502 may be used to store applications and data.
  • the application programs stored in the memory 502 include executable codes. Applications can be composed of various functional modules.
  • the processor 508 executes various functional applications and data processing by running application programs stored in the memory 502 .
  • the memory 502 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the storage data area may store data based on Data created by the use of the electronic device 10 (such as audio data, phone book, etc.), etc.
  • memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 508 and the input unit 503 with access to the memory 502 .
  • the input unit 503 can be used to receive inputted numbers, character information or user characteristic information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.
  • the input unit 503 may include a touch-sensitive surface as well as other input devices.
  • a touch-sensitive surface also known as a touch display or trackpad, can collect the user's touch operations on or near it (such as the user using a finger, stylus, or any suitable object or accessory on or near the touch-sensitive surface). operations near the surface), and drive the corresponding connection device according to the preset program.
  • the touch-sensitive surface may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact point coordinates, and then sends it to the touch controller. to the processor 508, and can receive commands sent by the processor 508 and execute them.
  • the display unit 504 may be used to display information input by the user or information provided to the user as well as various graphical user interfaces of the electronic device 10 , which may be composed of graphics, text, icons, videos, and any combination thereof.
  • the display unit 504 may include a display panel.
  • the display panel can be configured in the form of liquid crystal display (LCD, Liquid Crystal Display), organic light-emitting diode (OLED, Organic Light-Emitting Diode), etc.
  • the touch-sensitive surface can cover the display panel. When the touch-sensitive surface detects a touch operation on or near it, it is sent to the processor 508 to determine the type of the touch event. The processor 508 then displays the display panel according to the type of the touch event.
  • the touch-sensitive surface and the display panel are used as two independent components to implement the input and input functions, in some embodiments, the touch-sensitive surface and the display panel can be integrated to implement the input and output functions.
  • the display screen 110 may include an input unit 503 and a display unit 504.
  • Electronic device 10 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor.
  • the ambient light sensor may adjust the brightness of the display panel according to the brightness of the ambient light.
  • the proximity sensor may close the display panel and/or when the electronic device 10 moves to the ear. or backlight.
  • the gravity acceleration sensor can detect the magnitude of acceleration in various directions (usually three axes). It can detect the magnitude and direction of gravity when stationary.
  • the audio circuit 506 can provide an audio interface between the user and the electronic device 10 through speakers and microphones.
  • the audio circuit 506 can convert the received audio data into an electrical signal, transmit it to the speaker, and the speaker converts it into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 506 and converted into
  • the audio data after being processed by the audio data output processor 508, is sent to, for example, another electronic device 10 via the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing.
  • Audio circuitry 506 may also include a headphone holder to provide communication of peripheral headphones with electronic device 10 .
  • Wireless fidelity is a short-distance wireless transmission technology.
  • the electronic device 10 can help users send and receive emails, browse web pages, and access streaming media through the wireless fidelity module 507. It provides users with wireless broadband Internet access.
  • FIG. 5 shows the wireless fidelity module 507, it can be understood that it is not a necessary component of the electronic device 10 and can be omitted as needed without changing the essence of the invention.
  • the processor 508 is the control center of the electronic device 10, using various interfaces and lines to connect various parts of the entire electronic device 10, by running or executing application programs stored in the memory 502, and calling data stored in the memory 502, to execute Various functions of the electronic device 10 and processing data, thereby overall monitoring the electronic device 10 .
  • the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, application programs, etc. , the modem processor mainly handles wireless communications. It can be understood that the above modem processor may not be integrated into the processor 508.
  • Electronic device 10 also includes a power supply 509 that powers various components.
  • the power supply 509 can be logically connected to the processor 508 through a power management system, so that functions such as charging, discharging, and power consumption management can be implemented through the power management system.
  • Power supply 509 may also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components.
  • the electronic device 10 may also include a Bluetooth module, etc., which will not be described again here.
  • each of the above modules can be implemented as an independent entity, or can be combined in any way and implemented as the same or several entities.

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Abstract

本申请涉及一种摄像头模组及电子设备, 摄像头模组(12)包括安装座(121), 镜筒(122)和压电件(123), 镜筒(122)连接于安装座(121), 压电件(123)连接于安装座(121), 压电件(123)用于在单一电信号作用下产生第一方向和第二方向的运动, 以带动镜筒(122)相对安装座(121)运动并实现摄像头模组(12)的光学防抖.

Description

摄像头模组及电子设备
本申请要求于2022年03月29日申请的，申请号为2022103201083、名称为“摄像头模组及电子设备”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及摄像头模组技术领域，特别是涉及一种摄像头模组及电子设备。
背景技术
手机、平板电脑等电子设备的摄像头模组一般配备有音圈马达，音圈马达用于驱使摄像头模组内的透镜组运动，以实现摄像头模组的对焦或防抖功能。传统音圈马达一般为电磁式，其防抖性能的精度和行程受到模数转换/数模转换(ADC/DAC)的限制较大，难以同时实现高精度和大行程的防抖要求。
发明内容
根据本申请的各种实施例，提供一种摄像头模组及电子设备。
一方面，本申请提供一种摄像头模组，包括安装座、镜筒和压电件，所述镜筒、所述压电件分别连接于所述安装座，所述压电件用于在单一电信号作用下产生第一方向和第二方向的运动，以带动所述镜筒相对所述安装座运动并实现所述摄像头模组的光学防抖。
另一方面，本申请提供一种摄像头模组，包括安装座、镜筒、弹片和压电件，所述镜筒通过所述弹片与所述安装座相连接，所述压电件连接于所述安装座，所述压电件用于在单一电信号作用下产生第一方向和第二方向的运动，使得所述镜筒相对安装座运动，其中，第一方向和第二方向均与所述镜筒的光轴相垂直。
再一方面，本申请提供一种电子设备，包括壳体和上述的摄像头模组，所述摄像头模组设于所述壳体。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为一实施例的电子设备的示意图；
图2为一实施例的摄像头模组的示意图；
图3为另一实施例的摄像头模组的示意图；
图4为一实施例的摄像头模组的压电件、滚动体、位置传感器、镜筒及安装座的相对位置示意图；
图5为一实施例的电子设备的模块结构示意图。
附图标记：
10、电子设备       11、壳体            12、摄像头模组
12a、光轴          121、安装座         121a、限位槽
1211、底座         1213、支架          122、镜筒
123、压电件        1231、压电体        1233、摩擦头
124、滤光片        125、图像传感器     126、电路板
127、滚动体        128、预紧件         129、位置传感器
1291、磁体         1293、磁感应芯片
具体实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。附图中给出了本申请的较佳的实施例。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本申请的 公开内容的理解更加透彻全面。
作为在此使用的“电子设备”指包括但不限于经由以下任意一种或者数种连接方式连接的能够接收和/或发送通信信号的装置：
(1)经由有线线路连接方式，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；
(2)经由无线接口方式，如蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器。
被设置成通过无线接口通信的电子设备可以被称为“移动终端”。移动终端的示例包括但不限于以下电子装置：
(1)卫星电话或蜂窝电话；
(2)可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信***(Personal Communications System,PCS)终端；
(3)无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历、配备有全球定位***(Global Positioning System，GPS)接收器的个人数字助理(Personal Digital Assistant，PDA)；
(4)常规膝上型和/或掌上型接收器；
(5)常规膝上型和/或掌上型无线电电话收发器等。
参考图1和图2，在一些实施方式中，电子设备10为智能手机。电子设备10包括壳体11和摄像头模组12，摄像头模组12连接于壳体11。摄像头模组12可用于实现拍摄功能，例如近景、远景的拍摄，以及视频通话等。在一些实施方式中，电子设备10包括显示屏(未图示)，显示屏可用于显示图像并为用户提供交互界面。在一些实施方式中，摄像头模组12用于实现后置拍摄，即摄像头模组12的进光侧位于显示屏的显示面的背面；在另一些实施方式中，摄像头模组12可用于实现前置拍摄，即摄像头模组12的进光侧位于显示屏的显示面的同侧。在另一些实施方式中，电子设备10可以但不限于为平板电脑、笔记本、掌上电脑等设备。
参考图2，在一些实施方式中，摄像头模组12包括安装座121、镜筒122和压电件123，安装座121用于承载镜筒122和压电件123，镜筒122、压电件123分别连接于安装座121，镜筒122内安装有用于汇聚光线的透镜或透镜组。压电件123用于在单一电信号作用下产生第一方向和第二方向的运动，以带动镜筒122相对安装座121运动并实现摄像头模组12的光学防抖。
具体地，在一些实施方式中，安装座121可以包括底座1211和连接于底座1211的支架1213，镜筒122、压电件123分别连接于支架1213。摄像头模组12还可以包括滤光片124、图像传感器125和电路板126。滤光片124连接于底座1211并用于过滤红外光，以提升摄像头模组12的拍摄质量，滤光片124位于镜筒122和图像传感器125之间。图像传感器125连接于电路板126，电路板126连接于底座1211且电路板126可用于电性连接至外部电路例如手机的主板，以实现摄像头模组12与主板的通信连接。
继续参考图2，压电件123可以包括压电体1231及连接于压电体1231的摩擦头1233，压电体1231连接于安装座121的支架1213，摩擦头1233抵接于镜筒122。压电体1231用于在单一电信号作用下产生第一方向和第二方向的运动以带动摩擦头1233运动，进而通过摩擦头1233带动镜筒122相对安装座121运动，以实现摄像头模组12的光学防抖。摩擦头1233可采用摩擦系数相对较大的材料例如硅胶、橡胶等材料制成，以增大摩擦头1233与镜筒122之间的摩擦力，防止镜筒122与压电件123之间发生打滑。
相关技术中，摄像头模组12一般采用电磁式音圈马达实现对焦和防抖功能，音圈马达的电流和行程具有对应关系。通常来说，镜筒122或透镜的行程越大，则所需的驱动电流越大；电流精度越高，则最小驱动精度越高。例如，音圈马达行程为1mm，对应最大电流为1000mA，最小驱动精度对应为1um时，一般需要10bit的驱动IC(Integrated Circuit，集成电路)进行控制；当音圈马达行程对应扩展至2mm和3mm，最小驱动精度不变时，最大电流需对应扩展到2000mA和3000mA，此时一般需要11bit和12bit的驱动IC进行控制。随着电子设备10上摄像头模组12的像素的提升，摄像头模组12的图像传感器125及相应的光学元件的体积随之增大，对焦和防抖所需的行程及驱动力也相应增加，因此采用 音圈马达时会造成最大驱动电流的增加，导致摄像头模组12功耗增加，且ADC/DAC精度也相应增加并导致驱动IC的成本和尺寸大大增加。
在本申请实施方式中，压电体1231为谐振型压电体，其可以在一定的正弦波电压驱动下带动摩擦头1233进行椭圆运动，进而带动镜筒122相对安装座121运动。由于压电体1231的每次椭圆运动位移极小，一般为纳米级别运动，因此通过调整正弦波电压控制信号的周期数，即可较为容易地实现镜筒122的亚微米级位移。而且，由于压电体1231的运动行程和正弦波电压控制信号的周期数呈正相关，当需要实现镜筒122的长行程运动时，无需增加最大控制电流即可实现镜筒122的大行程运动，可以有效的降低摄像头模组12及电子设备10的功耗。
参考图2和图3，在一些实施方式中，镜筒122具有光轴12a，第一方向、第二方向与光轴12a两两正交。以光轴12a为Z轴、第一方向为X轴、第二方向为Y轴建立直角坐标系，则本申请实施方式的压电体1231可在单一电信号作用下产生X轴方向和Y轴方向的运动以带动摩擦头1233运动。
相关技术中的压电模块，一般只能驱动镜筒122在一个方向运动(例如X方向)，而光学防抖方案一般需要在XY两个正交方向上对镜筒122的位移进行控制，故一般需要设置2个以上的压电模块。而本申请实施方式的压电件123可以在单一电信号作用下同时在2个方向(X轴、Y轴)进行运动，可以有效简化光学防抖的驱动结构。
而且，相关技术中，一般通过一个电信号驱使压电模块在X方向变形，并通过另一个电信号驱使压电模块在Y方向变形，通过两个电信号的同步控制，使得压电模块可以合成椭圆运动，进而驱动镜筒122位移。这种结构设置，对两个电信号的同步性提出了较高的要求。而在本申请实施方式中，采用单一电信号即可实现压电件123在第一方向和第二方向的变形。例如，结合图4，在一些实施方式中，压电体1231大致呈矩形块状，摩擦头1233与压电体1231在Z轴方向相叠置，在压电体1231的其中两个侧面，例如在平行于XOZ的一个侧面及平行于YOZ的一个侧面施加单一电信号时，即可驱使压电体1231在X方向和Y方向变形并合成椭圆运动，进而通过摩擦头1233带动镜筒122位移以实现摄 像头模组12的光学防抖。当然，在一些实施方式中，也可以将单一电信号的两个端子分别施加在平行于XOZ的侧面和平行于XOY的侧面，以驱使摄像头模组12在Z方向和Y方向位移，此处不再赘述。
参考图2和图3，在一些实施方式中，摄像头模组12包括滚动体127，安装座121的支架1213开设有限位槽121a，滚动体127抵持于镜筒122且可滚动地设于限位槽121a。滚动体127可以为滚珠或滚柱，在镜筒122被驱使产生位移时，滚动体127可与镜筒122之间产生相对滚动，以减小镜筒122的位移阻力，提升光学防抖控制的响应速度。
参考图4，第一方向、第二方向均设有压电件123和滚动体127，且排布于第一方向上的压电体1231和滚动体127分别位于镜筒122的相对的两侧，排布于第二方向上的压电体1231与滚动体127分别位于镜筒122的相对的两侧。第一方向的压电件123与第二方向的压电件123可以协同工作，例如第一方向的压电件123与第二方向的压电件123可以同时工作，以调整镜筒122在第一方向和第二方向的位置，以提升控制精度和响应速度。
参考图2和图3，在一些实施方式中，摄像头模组12还可以包括预紧件128，预紧件128连接于安装座121及镜筒122，以使镜筒122抵压摩擦头1233和滚动体127。在一些实施方式中，预紧件128为弹片。弹片与安装座121的支架1213及镜筒122组装后，可以在光轴12a方向(Z轴)对镜筒122施加预紧力，以使镜筒122抵压于摩擦头1233和滚动体127，进而保证镜筒122的位置精度，例如使得光轴12a保持与图像传感器125的垂直关系，并保证压电件123的正常工作。
继续参考图3，摄像头模组12还可以包括位置传感器129，位置传感器129包括磁体1291和磁感应芯片1293，磁体1291和磁感应芯片1293中的一者连接于安装座121的支架1213，另一者连接于镜筒122，以用于检测镜筒122相对安装座121的位移。在本申请实施方式中，包括磁体1291和磁感应芯片1293的位置传感器129即为霍尔传感器的一种，其可利用磁场的变化确定两物之间的位移，且能够获得较高的控制精度。结合位置传感器129的设置，摄像头模组12的光学防抖可以形成闭环控制，即结合位置传感器129反馈镜筒122相对支 架1213的位移后，可以进一步提升光学防抖的控制精度。
参考图4，在一些实施方式中，摄像头模组12可以包括2个以上的位置传感器129，两个以上的位置传感器129环绕镜筒122设置。例如，在图4所示实施方式中，一个位置传感器129设置于第一方向上并位于第一方向的压电件123与镜筒122之间，另一个位置传感器129设置于第二方向上并位于第二方向的压电件123与镜筒122之间，这种设置方式，可以提升镜筒122在第一方向和第二方向的位置控制精度。进一步，在镜筒122的周向上，第一方向的滚动体127与第二方向的滚动体127之间，还可以再设置一个位置传感器129，以进一步提升镜筒122的位置控制精度。
图5示出了电子设备10的模块结构。该电子设备10可以包括射频(RF，Radio Frequency)电路501、包括有一个或一个以上计算机可读存储介质的存储器502、输入单元503、显示单元504、传感器505、音频电路506、无线保真(WiFi，Wireless Fidelity)模块507、包括有一个或者一个以上处理核心的处理器508、以及电源509等部件。本领域技术人员可以理解，图5中示出的电子设备10结构并不构成对电子设备10的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
射频电路501可用于收发信息，或通话过程中信号的接收和发送，特别地，将基站的下行信息接收后，交由一个或者一个以上处理器508处理；另外，将涉及上行的数据发送给基站。通常，射频电路501包括但不限于天线、至少一个放大器、调谐器、一个或多个振荡器、用户身份模块(SIM，Subscriber Identity Module)卡、收发信机、耦合器、低噪声放大器(LNA，Low Noise Amplifier)、双工器等。此外，射频电路501还可以通过无线通信与网络和其他设备通信。该无线通信可以使用任一通信标准或协议，包括但不限于全球移动通信***(GSM，Global System of Mobile communication)、通用分组无线服务(GPRS，General Packet Radio Service)、码分多址(CDMA，Code Division Multiple Access)、宽带码分多址(WCDMA，Wideband Code Division Multiple Access)、长期演进(LTE，Long Term Evolution)、电子邮件、短消息服务(SMS，Short Messaging Service)等。
存储器502可用于存储应用程序和数据。存储器502存储的应用程序中包含有可执行代码。应用程序可以组成各种功能模块。处理器508通过运行存储在存储器502的应用程序，从而执行各种功能应用以及数据处理。存储器502可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作***、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据电子设备10的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器502可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。相应地，存储器502还可以包括存储器控制器，以提供处理器508和输入单元503对存储器502的访问。
输入单元503可用于接收输入的数字、字符信息或用户特征信息(比如指纹)，以及产生与用户设置以及功能控制有关的键盘、鼠标、操作杆、光学或者轨迹球信号输入。具体地，在一个具体的实施例中，输入单元503可包括触敏表面以及其他输入设备。触敏表面，也称为触摸显示屏或者触控板，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触敏表面上或在触敏表面附近的操作)，并根据预先设定的程式驱动相应的连接装置。可选的，触敏表面可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器508，并能接收处理器508发来的命令并加以执行。
显示单元504可用于显示由用户输入的信息或提供给用户的信息以及电子设备10的各种图形用户接口，这些图形用户接口可以由图形、文本、图标、视频和其任意组合来构成。显示单元504可包括显示面板。可选的，可以采用液晶显示器(LCD，Liquid Crystal Display)、有机发光二极管(OLED，Organic Light-Emitting Diode)等形式来配置显示面板。进一步的，触敏表面可覆盖显示面板，当触敏表面检测到在其上或附近的触摸操作后，传送给处理器508以确定触摸事件的类型，随后处理器508根据触摸事件的类型在显示面板上提供相应的视觉输出。虽然在图5中，触敏表面与显示面板是作为两个独立的部件来实现输 入和输入功能，但是在某些实施例中，可以将触敏表面与显示面板集成而实现输入和输出功能。可以理解的是，显示屏110可以包括输入单元503和显示单元504。
电子设备10还可包括至少一种传感器505，比如光传感器、运动传感器以及其他传感器。具体地，光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板的亮度，接近传感器可在电子设备10移动到耳边时，关闭显示面板和/或背光。作为运动传感器的一种，重力加速度传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于电子设备10还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
音频电路506可通过扬声器、传声器提供用户与电子设备10之间的音频接口。音频电路506可将接收到的音频数据转换成电信号，传输到扬声器，由扬声器转换为声音信号输出；另一方面，传声器将收集的声音信号转换为电信号，由音频电路506接收后转换为音频数据，再将音频数据输出处理器508处理后，经射频电路501以发送给比如另一电子设备10，或者将音频数据输出至存储器502以便进一步处理。音频电路506还可能包括耳机座，以提供外设耳机与电子设备10的通信。
无线保真(WiFi)属于短距离无线传输技术，电子设备10通过无线保真模块507可以帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带互联网访问。虽然图5示出了无线保真模块507，但是可以理解的是，其并不属于电子设备10的必须构成，完全可以根据需要在不改变发明的本质的范围内而省略。
处理器508是电子设备10的控制中心，利用各种接口和线路连接整个电子设备10的各个部分，通过运行或执行存储在存储器502内的应用程序，以及调用存储在存储器502内的数据，执行电子设备10的各种功能和处理数据，从而对电子设备10进行整体监控。可选的，处理器508可包括一个或多个处理核心； 优选的，处理器508可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作***、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器508中。
电子设备10还包括给各个部件供电的电源509。优选的，电源509可以通过电源管理***与处理器508逻辑相连，从而通过电源管理***实现管理充电、放电、以及功耗管理等功能。电源509还可以包括一个或一个以上的直流或交流电源、再充电***、电源故障检测电路、电源转换器或者逆变器、电源状态指示器等任意组件。
尽管图5中未示出，电子设备10还可以包括蓝牙模块等，在此不再赘述。具体实施时，以上各个模块可以作为独立的实体来实现，也可以进行任意组合，作为同一或若干个实体来实现，以上各个模块的具体实施可参见前面的方法实施例，在此不再赘述。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种摄像头模组，其特征在于，包括：
    安装座；
    镜筒，连接于所述安装座；及
    压电件，连接于所述安装座，所述压电件用于在单一电信号作用下产生第一方向和第二方向的运动，以带动所述镜筒相对所述安装座运动并实现所述摄像头模组的光学防抖。
  2. 根据权利要求1所述的摄像头模组，其特征在于，所述压电件包括压电体及连接于所述压电体的摩擦头，所述压电体连接于所述安装座，所述摩擦头抵接于所述镜筒；所述压电体用于在单一电信号作用下产生第一方向和第二方向的运动以带动所述摩擦头运动。
  3. 根据权利要求2所述的摄像头模组，其特征在于，所述摄像头模组包括滚动体，所述安装座开设有限位槽，所述滚动体抵持于所述镜筒且可滚动地设于所述限位槽。
  4. 根据权利要求3所述的摄像头模组，其特征在于，所述摄像头模组包括预紧件，所述预紧件连接于所述安装座及所述镜筒，以使所述镜筒抵压所述摩擦头和所述滚动体。
  5. 根据权利要求4所述的摄像头模组，其特征在于，所述压电体为谐振型压电体，所述预紧件为弹片，所述滚动体为滚珠。
  6. 根据权利要求3所述的摄像头模组，其特征在于，所述镜筒具有光轴，所述第一方向、所述第二方向与所述光轴两两正交。
  7. 根据权利要求6所述的摄像头模组，其特征在于，所述第一方向、所述第二方向均设有所述压电件和所述滚动体，且排布于所述第一方向上的所述压电体和所述滚动体分别位于所述镜筒的相对的两侧，排布于所述第二方向上的所述压电体与所述滚动体分别位于所述镜筒的相对的两侧。
  8. 根据权利要求1所述的摄像头模组，其特征在于，所述摄像头模组包括位置传感器，所述位置传感器包括磁体和磁感应芯片，所述磁体和所述磁感应芯 片中的一者连接于所述安装座，另一者连接于所述镜筒，以用于检测所述镜筒相对所述安装座的位移。
  9. 根据权利要求8所述的摄像头模组，其特征在于，所述摄像头模组包括2个以上的所述位置传感器，两个以上的所述位置传感器环绕所述镜筒设置。
  10. 根据权利要求1-9任一项所述的摄像头模组，其特征在于，所述安装座包括底座和连接于所述底座的支架，所述镜筒、所述压电件分别连接于所述支架；所述摄像头模组包括滤光片、图像传感器和电路板，所述滤光片连接于所述底座，所述图像传感器连接于所述电路板，所述电路板连接于所述底座，所述滤光片位于所述镜筒和所述图像传感器之间。
  11. 一种摄像头模组，其特征在于，包括安装座、镜筒、弹片和压电件，所述镜筒通过所述弹片与所述安装座相连接，所述压电件连接于所述安装座，所述压电件用于在单一电信号作用下产生第一方向和第二方向的运动，使得所述镜筒相对安装座运动，其中，第一方向和第二方向均与所述镜筒的光轴相垂直。
  12. 根据权利要求11所述的摄像头模组，其特征在于，所述压电件具有摩擦头，所述弹片作用于所述镜筒的预紧力使得所述镜筒与所述摩擦头相抵，当所述压电件处于单一电信号作用时，所述摩擦头产生第一方向和第二方向的运动以摩擦带动所述镜筒相对所述安装座移动。
  13. 根据权利要求12所述的摄像头模组，其特征在于，所述压电件包括与所述摩擦头相连接的压电体，所述压电体连接于所述安装座，且所述压电体用于在单一电信号作用下发生变形以带动所述摩擦头产生第一方向和第二方向的运动。
  14. 根据权利要求13所述的摄像头模组，其特征在于，所述压电体在单一电信号作用下带动所述摩擦头沿椭圆形轨迹运动。
  15. 根据权利要求11所述的摄像头模组，其特征在于，所述摄像头模组包括滚动体，所述安装座开设有限位槽，所述滚动体可滚动地设于所述限位槽，且所述弹片作用于所述镜筒的预紧力使得所述镜筒与所述滚动体相抵。
  16. 根据权利要求15所述的摄像头模组，其特征在于，所述滚动体为滚珠。
  17. 根据权利要求15所述的摄像头模组，其特征在于，所述镜筒在第一方向的相对两侧分别设有所述压电体和所述滚动体，所述镜筒在第二方向的相对两侧分别设有所述压电体和所述滚动体。
  18. 根据权利要求11所述的摄像头模组，其特征在于，所述摄像头模组包括位置传感器，所述位置传感器包括磁体和磁感应芯片，所述磁体和所述磁感应芯片中的一者连接于所述安装座，另一者连接于所述镜筒，以用于检测所述镜筒相对所述安装座的位移。
  19. 根据权利要求18所述的摄像头模组，其特征在于，所述摄像头模组包括2个以上的所述位置传感器，两个以上的所述位置传感器环绕所述镜筒设置。
  20. 一种电子设备，其特征在于，包括壳体和权利要求1-19任一项所述的摄像头模组，所述摄像头模组设于所述壳体。
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