CN114205502A

CN114205502A - Camera module, lens control method and mobile terminal

Info

Publication number: CN114205502A
Application number: CN202111506304.1A
Authority: CN
Inventors: 徐龙
Original assignee: Shenzhen Transsion Holdings Co Ltd
Current assignee: Shenzhen Transsion Holdings Co Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-03-18

Abstract

The application provides a camera module, a lens control method and a mobile terminal, wherein the camera module comprises: the device comprises a driving device, a focusing device connected with the driving device and a lens connected with the focusing device. The driving device provides driving current for the focusing device when the mobile terminal falls off, and the focusing device controls the lens to move according to the driving current. Therefore, when the mobile terminal falls down, the driving device supplies driving current to the focusing device, so that the focusing device inhibits the movement of the lens under the action of the driving current, the lens is prevented from impacting a fixed part in the focusing device, and the lens is effectively protected.

Description

Camera module, lens control method and mobile terminal

Technical Field

The application relates to the technical field of camera modules, in particular to a camera module, a lens control method and a mobile terminal.

Background

With the development of mobile terminals, most mobile terminals are equipped with a camera to realize functions such as video and shooting. The camera generally includes a lens, a lens carrier for carrying the lens, and fixing members located at both sides of the lens carrier for fixing the lens carrier.

In the course of conceiving and implementing the present application, the inventors found that at least the following problems existed: when the mobile terminal falls, because movable spaces exist between the lens and the lens carrier and the fixed parts on the two sides, the lens and the lens carrier can continuously move in the movable spaces due to inertia, so that the lens impacts the fixed parts, and the performance of the camera is influenced.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

In view of the above technical problems, the present application provides a camera module, a lens control method and a mobile terminal, which avoid a lens from impacting a fixed part and improve the performance of a camera.

In order to solve the above technical problem, the present application provides a camera module, including: the device comprises a driving device, a focusing device and a lens connected with the focusing device; the driving device is used for providing driving current for the focusing device when the mobile terminal falls; the focusing device is used for controlling the lens to move according to the driving current.

Optionally, the focusing device includes a voice coil motor, the voice coil motor includes a fixing portion, a coil disposed on the fixing portion, and a magnet, the coil generates a magnetic field under the action of the driving current, and the magnetic field and the magnet generate an acting force to control the movement of the lens.

Optionally, the fixing portion includes a first fixing member and a second fixing member, the coil is located between the first fixing member and the second fixing member, and the magnet is located between the coil and the first fixing member. Optionally, the focusing device further comprises a lens carrier located between the coil and the second fixing part, the lens carrier being configured to carry the lens.

Optionally, the driving device includes a driving chip, and the driving chip is configured to provide the driving current for the focusing device according to the drop data of the mobile terminal.

The application also provides a mobile terminal which comprises the camera module.

Optionally, the mobile terminal further includes a processor connected to the driving device, where the processor is configured to obtain fall data of the mobile terminal when the mobile terminal falls, and generate a control instruction according to the fall data; the driving device is used for providing driving current for the focusing device according to the control instruction.

Optionally, the mobile terminal further includes a detection device connected to the processor, and the detection device is configured to detect the fall data; and/or the power connection state of the camera module.

The present application further provides a lens control method, including:

determining or generating a control instruction according to the falling data of the mobile terminal;

and controlling a driving device to generate a driving current through the control instruction so that a focusing device of the camera module controls the lens to move according to the driving current.

Optionally, the fall data comprises a fall speed;

determining or generating a control instruction according to the falling data of the mobile terminal, comprising the following steps:

and when the falling speed is greater than or equal to a speed threshold value, determining or generating the control instruction according to the falling data.

Optionally, the fall data comprises a fall speed and/or a fall direction, and the control instruction comprises a current magnitude and/or a current direction;

determining or generating a control instruction according to the fall data comprises:

determining or generating the current magnitude according to the falling speed; and/or the presence of a gas in the gas,

determining or generating the current direction according to the falling direction.

Optionally, the determining or generating the current magnitude according to the falling speed includes:

acquiring a target distance between the mobile terminal and a horizontal plane;

and determining the current according to the target distance and the falling speed.

Optionally, the determining or generating a control instruction according to the fall data of the mobile terminal includes:

acquiring the power connection state of the camera module;

and determining or generating the control instruction according to the power connection state and the drop data.

Optionally, the determining or generating the control instruction according to the power connection state and the drop data includes:

when the power connection state is a power-on state, determining or generating the control instruction according to the current driving current of the driving device and the drop data; and/or the presence of a gas in the gas,

and when the power connection state is a power-off state, generating the control instruction according to the current position of the lens and the falling data.

The present application further provides a mobile terminal, the mobile terminal including: the lens control method comprises a memory and a processor, wherein the memory stores a lens control program, and the lens control program realizes the steps of any one of the lens control methods when being executed by the processor.

The present application further provides a readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the lens control method as set forth in any one of the above.

As described above, the camera module of the present application includes: the device comprises a driving device, a focusing device and a lens connected with the focusing device. The driving device provides driving current for the focusing device when the mobile terminal falls off, and the focusing device controls the lens to move according to the driving current. Therefore, when the mobile terminal falls down, the driving device supplies driving current to the focusing device, so that the focusing device controls the lens to move under the action of the driving current, the lens is prevented from impacting a fixed part in the focusing device, and the lens is effectively protected.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic hardware structure diagram of a mobile terminal implementing various embodiments of the present application;

fig. 2 is a communication network system architecture diagram according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a camera module according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a voice coil motor according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;

fig. 6 is a flowchart of a lens control method according to an embodiment of the present application.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings. With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of an element by the phrase "comprising an … …" does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element, and further, where similarly-named elements, features, or elements in different embodiments of the disclosure may have the same meaning, or may have different meanings, that particular meaning should be determined by their interpretation in the embodiment or further by context with the embodiment.

It should be understood that, although the steps in the flowcharts in the embodiments of the present application are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, in different orders, and may be performed alternately or at least partially with respect to other steps or sub-steps of other steps.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

It should be noted that step numbers such as S10 and S20 are used herein for the purpose of more clearly and briefly describing the corresponding content, and do not constitute a substantial limitation on the sequence, and those skilled in the art may perform S20 first and then S10 in specific implementation, which should be within the scope of the present application.

It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for the convenience of description of the present application, and have no specific meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.

The mobile terminal described in the present application may include mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and fixed terminals such as a Digital TV, a desktop computer, and the like.

The following description will be given taking a mobile terminal as an example, and it will be understood by those skilled in the art that the configuration according to the embodiment of the present application can be applied to a fixed type terminal in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present application, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following describes each component of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex-Long Term Evolution), TDD-LTE (Time Division duplex-Long Term Evolution, Time Division Long Term Evolution), 5G, and so on.

WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor that may adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 1061 and/or the backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Alternatively, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. Optionally, the touch detection device detects a touch orientation of a user, detects a signal caused by a touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Optionally, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited thereto.

Alternatively, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a program storage area and a data storage area, and optionally, the program storage area may store an operating system, an application program (such as a sound playing function, an image playing function, and the like) required by at least one function, and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 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.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor, optionally, the application processor mainly handles operating systems, user interfaces, application programs, etc., and the modem processor mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present application, a communication network system on which the mobile terminal of the present application is based is described below.

Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present disclosure, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.

Optionally, the UE201 may be the terminal 100 described above, and is not described herein again.

The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Alternatively, the eNodeB2021 may be connected with other enodebs 2022 through a backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.

The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. Optionally, the MME2031 is a control node that handles signaling between the UE201 and the EPC203, providing bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.

Although the LTE system is described as an example, it should be understood by those skilled in the art that the present application is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems (e.g. 5G), and the like.

Based on the above mobile terminal hardware structure and communication network system, various embodiments of the present application are provided.

When the mobile device falls, because the lens is located on a lens carrier (carrier) in the focusing device, the lens carrier is fixed by reeds on two sides, a movable space exists between the lens carrier and the fixed parts on two sides of the reeds, and when the mobile device falls to the ground, the lens and the lens carrier have large initial speed and gravity acceleration, so that the mobile device continues to move, and the lens carrier may collide with the fixed parts. For example, when the mobile device is dropped, if the lens is facing the ground, it is easy to cause the lens and the lens carrier to strike the bottom mount (base/holder) of a Voice Coil Motor (VCM), and if the lens is away from the ground, it is easy to cause the lens and the lens assembly to strike the top mount (cover/yoke).

In some implementations, the protective shell is sleeved on the mobile device, so that when the mobile device falls, the protective shell buffers gravity of the mobile device, and instantaneous impact force between the mobile device and the ground is reduced, so that the camera is protected. However, the protective housing cannot change the initial velocity and the gravitational acceleration of the lens, so that the lens is difficult to be prevented from impacting the fixed part, and the camera cannot be effectively protected.

To above-mentioned problem, this application provides a module of making a video recording, includes: the device comprises a driving device, a focusing device and a lens connected with the focusing device. The driving device provides driving current for the focusing device when the mobile terminal falls off, and the focusing device controls the lens to move according to the driving current. When the mobile terminal falls off, the driving current is provided for the focusing device, so that the focusing device generates restraining force under the action of the driving current, the restraining force restrains the movement of the lens, the lens is prevented from impacting a fixed part in the focusing device, and the lens is effectively protected.

First embodiment

In order to facilitate understanding of the embodiments of the present application, the following describes a camera module of the present application.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a camera module according to an embodiment of the present disclosure, in which the camera module 301 includes:

a driving device 311, a focusing device 312, and a lens 313 connected to the focusing device 312;

the driving device 311 is used for providing a driving current for the focusing device 312 when the mobile terminal falls;

the focusing device 312 is used to control the movement of the lens 313 according to the driving current.

The driving device 311 provides a driving current to the focusing device 312 when the mobile terminal falls, so that the focusing device 312 generates a restraining force under the action of the driving current to restrain the movement of the lens 313, thereby preventing the lens 313 from hitting a fixed part in the focusing device 312.

The driving device 311 includes a driving chip, and the driving chip provides a driving current for the focusing device 312 according to the falling data of the mobile terminal when falling, for example, provides a driving current for the focusing device 312 according to the falling speed and the falling direction of the mobile terminal when falling. Optionally, the magnitude of the driving current is determined according to the falling speed, the direction of the driving current is determined according to the falling direction, and the larger the falling speed is, the larger the driving current is, and the smaller the falling speed is, the smaller the driving current is. The larger the falling speed is, the larger the initial speed of the lens when falling is indicated, and the shorter the time required for the lens to fall to the ground is, so that the driving current needs to be increased to increase the restraining force, and the restraining force pulls the lens to move towards the current movement direction quickly. The falling direction may include various directions, such as a front side vertically downward, a parabolic downward, a back side vertically downward, a parabolic downward, etc., where the front side may be understood as a screen side. Then, determining the movement direction of the lens according to the falling direction, optionally, when the falling direction of the mobile terminal is that the front surface is vertically downward, the current movement direction of the lens is towards the bottom fixing piece, and the direction of the driving current is the direction capable of generating the acting force towards the top fixing piece; when the falling direction of the mobile terminal is that the back surface is vertically downward, the current moving direction of the lens is towards the top fixing piece, and then the direction of the driving current is the direction capable of generating the acting force towards the bottom fixing piece.

The focusing device 312 generates a suppression force by the driving current to suppress the movement of the lens 313. The focusing device 312 controls the movement speed of the lens according to the magnitude of the driving current, and the larger the driving current is, the larger the suppression force is, and the smaller the driving current is, the smaller the suppression force is. The focusing device 312 controls the moving direction of the lens 313 according to the direction of the driving current, and when the moving direction of the lens 313 is toward one side fixing member, the focusing device 112 generates a restraining force according to the direction of the driving current, so that the lens 313 moves in a direction away from the one side fixing member.

In one embodiment, the focusing device 312 may include a voice coil motor, the voice coil motor includes a fixing portion, a coil 405 disposed on the fixing portion, and a magnet 406, the coil 405 generates a magnetic field under the action of a driving current provided by the driving device 311, and the magnetic field generated by the coil 405 and the magnetic field generated by the magnet 406 interact to generate an acting force to control the lens 313 to move, so as to prevent the lens from striking the fixing portion. That is, the coil 405 generates a variable electric field, the magnet 406 generates an invariable electric field, and the variable electric field and the invariable electric field interact with each other to generate a suppression force. Alternatively, when the direction of the magnetic field of the coil 405 is the same as that of the magnet 406, the coil 405 moves in a direction close to the magnet 406; when the magnetic field direction of the coil 405 is opposite to the magnetic field direction of the magnet 406, the coil 405 moves in a direction away from the magnet 406. Since the coil 405 drives the lens 313 to move, the moving direction of the coil 405 can be controlled by the direction of the driving current, and further the moving direction of the lens 313 can be controlled. The direction of the magnetic field generated by the coil 405 can be determined by the ampere rule, that is, the coil can be held by the right hand, the four fingers point to the direction of the driving current, and the end pointed by the thumb is the N pole of the coil.

Alternatively, referring to fig. 4, the fixing portion may include a first fixing member 409 and a second fixing member 401, the first fixing member 409 being, for example, magnetically conductive (yoke/cover), the second fixing member 401 being, for example, a base (base/holder), the coil 405 being located between the first fixing member 409 and the second fixing member 401, and the magnet 406 being located between the coil 405 and the first fixing member 409. When the direction of the magnetic field generated by the coil 405 under the action of the driving current is the same as that of the magnet 406, the lens 313 is driven to move towards the first fixing part 409, and when the direction of the magnetic field generated by the coil 405 is opposite to that of the magnet 406, the lens 313 is driven to move towards the second fixing part 401.

Optionally, the focusing device 312 further comprises a lens carrier 404 located between the coil 405 and the second fixing part 409, the lens carrier 404 being used for carrying the lens 313. The lens carrier 404 is connected with the coil 405, and when the coil 405 moves towards the direction close to the magnet 406 under the action of the driving current, the lens carrier 404 is driven to move towards the direction close to the magnet 406, and then the lens 313 is driven to move towards the direction close to the magnet 406. Accordingly, when the coil 405 moves away from the magnet 406 under the action of the driving current, the lens carrier 404 is driven to move away from the magnet 406, and the lens 313 is driven to move away from the magnet 406.

Optionally, the focusing device 312 may further include a rear spring 402 between the lens carrier 404 and the second fixing member 401, and a rear spacer (bottom spacer)403 between the rear spring 402 and the second fixing member 401, and a front spring 407 between the magnet 406 and the first fixing member 409, and a front spacer (top spacer)408 between the front spring 407 and the first fixing member 409. The back reed 402 and the front reed 407 are both connected with the coil 405 and the lens carrier 404, and are used for carrying the lens carrier 404 and balancing moment, and the back reed 402 and the front reed 407 stretch or compress when the coil 405 moves so as to drive the lens carrier 404 to move. The back pad 403 and the front pad 408 are used for insulation.

In the present embodiment, the focusing device 312 generates a restraining force under the action of the driving current to restrain the movement of the lens 313. The focusing device 312 controls the movement speed of the lens according to the magnitude of the driving current, and the larger the driving current is, the larger the suppression force is, and the smaller the driving current is, the smaller the suppression force is. When the focusing device 312 controls the moving direction of the lens according to the direction of the driving current, and the moving direction of the lens is toward one side fixing member, the focusing device 312 generates a restraining force according to the direction of the driving current, so that the lens 313 moves in a direction away from the side fixing member.

The driving device 311 provides a driving current for the focusing device 312, that is, the voice coil motor is powered on, after the voice coil motor is powered on, the current passes through the coil 405, the coil 406 generates a magnetic field, the coil magnetic field interacts with the magnetic field of the magnet, so that the coil 406 moves up and down to drive the front reed 407 and the rear reed 403 to stretch or compress, thereby driving the lens carrier 404 to move, and further driving the lens 313 to move, thereby preventing the lens 313 from impacting an infrared filter (IR-CUT) and the lens carrier 404 to impact a magnetic conductor if the lens 313 faces the ground when the mobile terminal falls, and preventing the lens 313 and the lens carrier 404 from impacting a base if the lens 313 is far away from the ground.

The application provides a module of making a video recording provides drive current for focusing device through drive arrangement when mobile terminal falls for focusing device controls the camera lens motion under drive current's effect, avoids the camera lens striking to focus the fixed part among the device, effectually protects the camera lens.

Second embodiment

An embodiment of the present application further provides a mobile terminal, please refer to fig. 5, where fig. 5 is a schematic structural diagram of the mobile terminal provided in the embodiment of the present application, and the mobile terminal includes: the camera module 310 is described above.

The mobile terminal may be a device having a camera module, and optionally, may be a mobile device such as a mobile phone having a camera, a tablet computer, and the like. The camera module 310 may be an Auto Focus (AF) module, an Optical Image Stabilization (OIS) module, or a micro-cloud platform module.

The mobile terminal comprises a processor 501 connected with the camera module 310, and the processor 501 acquires falling speed data when the mobile terminal falls and generates a control instruction according to the falling data. The control command is used to instruct the driving device 311 in the camera module 310 to provide a driving current, and the driving device 311 provides a driving current for the focusing device 312 according to the control command. The focusing device 312 generates a restraining force under the action of the driving current supplied from the driving device 311, and restrains the movement of the force-controlled lens 313.

The mobile terminal may further include a detection device 502 connected to the processor 501, and the detection device 502 may detect falling data when the mobile terminal falls and/or a state of the camera module. Alternatively, the detecting device 502 may be a gyroscope (gyro) which detects falling data of the mobile terminal when the mobile terminal falls, the gyroscope may be attached to a main board of the mobile terminal, and the gyroscope is a sensor which can be used to detect and sense linearity and motion of a 3D space, so that a direction can be recognized, a posture can be confirmed, acceleration can be calculated, and the like. The detection device 502 may also be configured to detect a power connection state of the camera module 310, and when the detection device 502 detects a falling speed and a falling direction of the mobile terminal when falling, the processor 501 generates a control instruction according to the falling speed and the falling direction, where the control instruction may include a magnitude and a direction of the driving current. When the detection device 502 detects the power-on state of the camera module 310, the processor 501 may control the camera module 310 to be turned on or off according to the power-on state. When the detecting device 502 detects the falling data of the mobile terminal falling and the power connection state of the camera module 310, the processor 501 may generate a control instruction according to the falling data and the power connection state.

Alternatively, the detection device 502 may also be a camera, an infrared device, or the like. The falling speed and falling direction of the mobile terminal when falling can be detected by the camera, and the falling speed and the like of the mobile terminal when falling are detected by the infrared device. The application provides a mobile terminal, drive arrangement through the module of making a video recording provides drive current for focusing device when mobile terminal falls for focusing device controls the camera lens motion under drive current's effect, avoids the camera lens striking fixed part among the focusing device, effectually protects the camera lens.

Third embodiment

Referring to fig. 6, fig. 6 shows a flowchart of a lens control method according to an embodiment of the present application. The method comprises the following steps:

and S10, determining or generating a control instruction according to the falling data of the mobile terminal.

And S20, controlling the driving device to generate driving current through the control command, so that the focusing device of the camera module controls the lens to move according to the driving current.

The lens control method will be described in detail below with reference to two embodiments.

In the embodiment, the processor is used as an execution main body, and the processor acquires fall data of the mobile terminal and determines or generates a control instruction according to the fall data. And then, controlling the driving device to generate a driving circuit through the control instruction so as to enable the focusing device of the camera module to control the lens to move according to the driving current.

Alternatively, the falling data may include a falling speed, and since the lens has a small speed when the falling speed is small, the lens may move between the fixing members on both sides but not to hit the fixing members on both sides. Therefore, after the falling speed of the mobile terminal is acquired, whether the falling speed is greater than a speed threshold can be judged, and the speed threshold can be understood as the speed which can cause the lens to impact the fixed component. And when the falling speed is greater than or equal to the speed threshold, determining or generating a control command according to the falling data, thereby improving the accuracy of controlling the lens.

Optionally, the fall data may further include a fall speed and/or a fall direction, and optionally the control instructions may include a current magnitude and/or a current direction. The magnitude of the driving current is related to the falling speed, and the larger the falling speed is, the larger the driving current is; the direction of the drive circuit is related to the drop direction. When the falling data comprises a falling speed, determining or generating the current according to the falling speed; when the falling data comprises a falling direction, determining or generating a current direction according to the falling direction; when the falling data comprises the falling speed and the falling direction, the current magnitude is determined or generated according to the falling speed, and the current direction is determined or generated according to the falling direction.

In an embodiment, the processor may further obtain a target distance between the mobile terminal and a horizontal plane, and optionally, the target distance may be obtained through a gyroscope, a camera, an infrared device, or the like. Then, the current magnitude is determined or generated according to the target distance and the falling speed. When the falling speed is small and/or the distance between the current position and the ground is large, the driving current is small, so that the focusing device controls the lens to move slowly. A smaller drop velocity and/or a larger target distance indicates a longer time required for the lens to drop to the ground, and a smaller drive current can be provided to generate a smaller restraining force. The smaller the generated restraining force is, the gentler the moving speed of the lens is, and thus when the falling speed is small and/or the target distance is large, a small driving current is supplied to generate a large restraining force so that the lens is smoothly moved in the direction opposite to the current moving direction. The larger the falling speed and/or the smaller the target distance, indicating that the shorter the time required for the lens to fall to the ground, the larger the driving current may be provided to generate the larger restraining force, the larger the restraining force, the sharper the moving speed of the lens, and thus when the falling speed is larger and/or the target distance is smaller, the larger the driving current may be provided to generate the larger restraining force to cause the lens to move sharply in the direction opposite to the current moving direction.

In an embodiment, the processor may further obtain a power connection state of the camera module, and determine or generate the control instruction according to the power connection state and the drop data. When the camera module is in a power-off state, the lens and the focusing device are in a natural state, when the camera module is in a power-on state, the lens and the focusing device are in a focusing mode under the action of the driving device, when the camera module is in the natural state and the focusing mode, the position of the lens is different, and the acceleration and the speed of the lens are different when the camera module falls at the same height, so that the required driving currents are different. Therefore, the processor can also be used for determining or generating a control instruction according to the power-on state of the camera module and the falling data of the mobile terminal.

Optionally, when the power connection state of the camera module is a power-on state, determining or generating a control instruction according to the current driving current and the drop data of the driving device; and/or when the power connection state of the camera module is a power-off state, generating a control instruction according to the current position and the falling data of the lens. Optionally, when the power connection state of the camera module is in a power connection state, the processor generates a first control instruction according to the current driving current, the dropping speed and the dropping direction of the driving device, so that the driving device provides a first driving current different from the current driving current to the focusing device according to the first control instruction. When the camera module is in a power-off state, the processor generates a second control instruction according to the current position, the falling direction and the falling speed of the lens, so that the driving device provides a second driving current according to the second control instruction. The current position may be, for example, an initial position of the lens when the camera module is turned off, or a position where the lens is not returned to the initial position in the last use.

Optionally, when the module of making a video recording is in the power-on state, can also make the module of making a video recording be in the power-off state back with the module of making a video recording deenergization, provide drive current to the module of making a video recording again and make the module of making a video recording get into the dropproof mode, and when the module of making a video recording was in the power-off state, directly provide drive current to the module of making a video recording and make the module of making a video recording get into the dropproof mode. Therefore, under the same height, the falling time of the camera module in the power-on state is equal to the sum of the time required for powering down, the time for entering the falling-proof mode and the time for being in the falling-proof mode, the falling time of the camera module in the power-off state is equal to the sum of the time for entering the falling-proof mode and the time for being in the falling-proof mode, namely, the time for being in the falling-proof mode in the power-on state of the camera module is smaller than the time for being in the falling-proof mode in the power-off state of the camera module, and therefore the amplitude of the first driving current is set to be larger than the amplitude of the second driving current. When the first driving current is larger than the amplitude of the second driving current, the generated restraining force is larger, the time of the lens moving to the direction opposite to the current moving direction can be shortened, and the lens is effectively restrained from moving to the current moving direction.

Generally, when the mobile terminal falls, no matter what the initial falling direction is, the final mobile terminal faces the ground, that is, the final falling direction of the mobile terminal is vertically downward, so that the falling direction of the mobile terminal can be defaulted to be vertically downward, and only the falling speed of the mobile terminal needs to be detected, the falling direction of the mobile terminal does not need to be detected, and the consumption of a system is reduced.

After the processor determines or generates a control instruction, the driving device is controlled to generate a driving current through the control instruction, and the driving current generated by the driving device acts on the focusing device, so that the focusing device generates a restraining force under the action of the driving current, and the restraining force can restrain the lens from continuously moving towards the current movement direction.

In this embodiment, the processor determines or generates a control instruction according to the falling data of the mobile terminal, and controls the driving device to generate the driving current through the control instruction, so that the focusing device of the camera module controls the lens to move according to the driving current, thereby better preventing the lens from colliding with a fixed part in the focusing device, and effectively protecting the camera module of the mobile terminal.

Fourth embodiment

The embodiment of the application further provides a lens control method, wherein the driving device is used as an execution main body, and after the driving device acquires falling data of the mobile terminal, a control instruction is determined or generated according to the falling data. And then the driving device is controlled to generate driving current through the control instruction, so that the focusing device of the camera module controls the lens to move according to the driving current. Optionally, after the driving device acquires the falling data of the mobile terminal, a control instruction is determined or generated according to the falling data, and then the driving device is controlled to generate a driving current according to the control instruction, that is, the driving device acquires the falling data and generates the driving current according to the falling data, so that the focusing device of the camera module controls the lens to move according to the driving circuit.

The falling data comprises falling speed, the driving device can judge whether the falling speed is greater than a speed threshold value or not after acquiring the falling speed, if the falling speed is greater than or equal to the speed threshold value, a control instruction is determined or generated according to the falling data, namely when the falling speed is greater than or equal to the speed threshold value, driving current is generated according to the falling speed.

The fall data includes fall speed and/or fall direction, and the control instructions include current magnitude and/or direction. When the falling data comprise the falling speed, the driving device determines or generates the current according to the falling speed; when the falling data comprise a falling direction, the driving device determines or generates a current direction according to the falling direction; when the falling data comprises the falling speed and the falling direction, the driving device determines or generates the current according to the falling speed and determines or generates the current direction according to the falling direction.

After the driving device generates the control instruction, the driving device can drive the driving device to generate driving current through the control instruction, and the control instruction comprises the magnitude of the generated driving current when the driving current is large; when the control command comprises a driving direction, the generated driving current has a direction; the control command includes a magnitude and a direction of the driving current, and the driving current generated has a magnitude and a direction. Optionally, the focusing device controls the movement of the lens according to a driving current generated by the driving device.

The driving device can also acquire the target distance between the mobile terminal and the horizontal plane, and determine or generate the current according to the target distance and the falling speed. When the falling speed is low and the distance between the current position and the ground is large, the driving current is low, so that the focusing device controls the lens to move slowly; when the falling speed is high and the distance between the current position and the ground is small, the driving current is high, so that the focusing device controls the lens to rapidly move.

The driving device can also acquire the power connection state of the camera module, and determines or generates a control instruction according to the power connection state of the camera module and the falling data of the mobile terminal. When the power connection state of the camera module is a power-on state, determining or generating a control instruction according to the current driving current and the drop data of the driving device; and/or when the power connection state of the camera module is a power-off state, generating a control instruction according to the current position and the falling data of the lens.

In this embodiment, the driving device determines or generates a control instruction according to the falling data of the mobile terminal, and controls the driving device to generate a driving current through the control instruction, so that the focusing device controls the lens to move according to the driving current, thereby better preventing the lens from colliding with a fixed part in the focusing device, and effectively protecting the camera module of the mobile terminal.

The embodiment of the present application further provides a mobile terminal, where the mobile terminal includes a memory and a processor, and the memory stores a lens control program, and the lens control program, when executed by the processor, implements the steps in any of the above lens control method embodiments.

The present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in any of the above-mentioned lens control method embodiments.

In the embodiments of the mobile terminal and the computer-readable storage medium provided in the present application, all technical features of any one of the embodiments of the lens control method may be included, and the expanding and explaining contents of the specification are basically the same as those of the embodiments of the method, and are not described herein again.

Embodiments of the present application also provide a computer program product, which includes computer program code, when the computer program code runs on a computer, the computer is caused to execute the method in the above various possible embodiments.

Embodiments of the present application further provide a chip, which includes a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a device in which the chip is installed executes the method in the above various possible embodiments.

The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.

The device in the equipment of the embodiment of the application can be combined, divided and deleted according to actual needs.

In the present application, the same or similar term concepts, technical solutions and/or application scenario descriptions will be generally described only in detail at the first occurrence, and when the description is repeated later, the detailed description will not be repeated in general for brevity, and when understanding the technical solutions and the like of the present application, reference may be made to the related detailed description before the description for the same or similar term concepts, technical solutions and/or application scenario descriptions and the like which are not described in detail later.

In the present application, each embodiment is described with emphasis, and reference may be made to the description of other embodiments for parts that are not described or illustrated in any embodiment.

The technical features of the technical solution of the present application may be arbitrarily combined, and for brevity of description, all possible combinations of the technical features in the embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the scope of the present application should be considered as being described in the present application.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims

1. A camera module is characterized by comprising a driving device, a focusing device and a lens connected with the focusing device; the driving device is used for providing driving current for the focusing device when the mobile terminal falls; the focusing device is used for controlling the lens to move according to the driving current.

2. The camera module of claim 1, wherein the focusing device comprises a voice coil motor, the voice coil motor comprises a fixing portion, a coil disposed on the fixing portion, and a magnet, the coil generates a magnetic field under the action of the driving current, and the magnetic field and the magnet generate an acting force to control the lens to move.

3. The camera module of claim 2, wherein the fixing portion comprises a first fixing member and a second fixing member, the coil is positioned between the first fixing member and the second fixing member, and the magnet is positioned between the coil and the first fixing member.

4. The camera module of claim 3, wherein the focusing assembly further comprises a lens carrier positioned between the coil and the second stationary component, the lens carrier being configured to carry the lens.

5. The camera module according to any one of claims 1 to 4, wherein the driving device comprises a driving chip, and the driving chip is configured to provide the driving current for the focusing device according to the falling data of the mobile terminal.

6. A lens control method, comprising:

7. The method of claim 6, wherein the fall data comprises a fall speed and/or a fall direction, and the control instructions comprise a current magnitude and/or a current direction;

8. The method according to claim 6 or 7, wherein the determining or generating the control instruction according to the fall data of the mobile terminal comprises:

acquiring the power connection state of the camera module;

9. The method according to claim 8, wherein the determining or generating the control instruction according to the power connection status and the drop data comprises:

10. A mobile terminal, characterized in that it comprises a camera module according to any one of claims 1 to 5; and/or, the mobile terminal comprises: memory, processor, wherein the memory has stored thereon a lens control program which, when executed by the processor, implements the steps of the lens control method of any one of claims 6 to 9.