KR101571169B1 - Camera module assembly for optical stabilizer and mobile terminal having camera module assembly and method for obtaining image by using mobile terminal - Google Patents

Abstract

The present invention provides a camera module comprising: a camera module configured to acquire an image of a subject; A shake sensor configured to detect a shake of the mobile terminal and generate a shake signal; An actuator configured to tilt the camera module; And a controller for driving the actuator to tilt the camera module to correct the shake when the shake signal is received through the shake sensor in a state in which the camera module is on, The present invention relates to a method of acquiring images.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera module assembly for camera shake correction, a mobile terminal including the camera module assembly, and an image acquisition method using the mobile terminal. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002]

The present invention relates to a mobile terminal capable of correcting camera shake by tilting a camera module, a camera module assembly used therein, and a method of acquiring an image using the mobile terminal.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In addition, as the camera module is mounted, functions as a digital camera and a digital camcorder are realized.

In the case of photographing through such a mobile terminal, shaking due to the shaking of the user occurs, so that the quality of the image is lowered.

Such a method of correcting a user's hand shake is roughly classified into two types.

The first method is to use images. This detects the shaking of the screen by using a digital image processing technique on the video signal and corrects the shaking motion.

The second method is a method of correcting the shaking of the photographing apparatus through an optical system adjustment. Such a correction method through optical system adjustment can be classified into types according to the correction method. That is, there are a method of moving the lens, a method of moving the image sensor, and a liquid crystal prism method.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mobile terminal capable of being thinned, having an optical correction function of high quality, and a camera module assembly provided in the mobile terminal.

According to an aspect of the present invention, there is provided a mobile terminal including: a camera module configured to acquire an image of a subject; A shake sensor configured to detect a shake of the mobile terminal and generate a shake signal; An actuator configured to tilt the camera module; And a controller for driving the actuator to tilt the camera module to correct the shake when the shake signal is received through the shake sensor in a state in which the camera module is turned on.

According to an aspect of an embodiment of the present invention, the mobile terminal may further include an elastic member configured to support the camera module.

According to an embodiment of the present invention, the mobile terminal further includes a housing into which the camera module is inserted, and the elastic member includes a leaf spring, A moving part to be attached, and a supporting part attached to the housing.

According to an embodiment of the present invention, the actuator includes a magnet attached to at least one side of the camera module, a magnet disposed at a predetermined distance from the outer circumferential surface of the magnet, The coil may be a coil.

According to an aspect of the embodiment of the present invention, the actuator includes a first actuator configured to pivot the camera module in a first axis, a second actuator configured to pivot the camera module in a second axis, . ≪ / RTI >

According to an embodiment of the present invention, the first actuator includes a first magnet attached to one side of the camera module, and a first coil disposed at a predetermined distance from an outer circumferential surface of the first magnet And the second actuator is attached to the other side of the camera module and has a second magnet attached on a plane which is not the same as the first magnet and a second coil arranged at a predetermined distance from the outer circumferential face of the second magnet .

According to an aspect of the embodiment of the present invention, the mobile terminal further includes a power supply unit for supplying power to the camera module, and an input current may be provided to the coil through the power supply unit .

According to an embodiment of the present invention, when the shaking angle and the shaking direction of the mobile terminal are detected by the shaking sensor, the control unit controls the shaking motion of the mobile terminal in the direction opposite to the shaking direction, The actuator can be driven to tilt the module.

According to an embodiment of the present invention, the mobile terminal may further include a wired / wireless communication unit configured to transmit an image obtained from the camera module to the outside.

According to another aspect of the present invention, there is provided a method for acquiring an image in a mobile terminal, comprising: acquiring a subject through a camera module of the mobile terminal; Detecting a shake of the mobile terminal through a shake sensor of the mobile terminal to generate a shake signal; And driving the actuator of the mobile terminal based on the wobble signal to tilt the camera module to correct the wobble.

According to another aspect of the present invention, the step of driving the actuator of the mobile terminal based on the shake signal to tilt the camera module to correct the shake may include: And tilting the camera module by the shaking angle in a direction opposite to the shaking direction when the shaking angle and direction of the camera module are detected.

According to another aspect of the present invention, there is provided a method for acquiring an image, the method comprising: when the power supplied to the actuator is turned off, the camera module returns to the original position by the elastic force of the elastic member supporting the camera module; The method comprising the steps of:

According to another aspect of the present invention, there is provided a camera module assembly for shake correction comprising a camera module configured to acquire an image of a subject, the camera module including a lens unit and an image sensor; An actuator configured to tilt the camera module; And a power supply configured to supply power to the actuator.

According to another aspect of the present invention, the camera module assembly may further include an elastic member for supporting the camera module.

According to another aspect of the present invention, the camera module assembly further includes a housing into which the camera module is inserted, and the elastic member includes a leaf spring, A moving part to be attached, and a supporting part attached to the housing.

According to an aspect of another embodiment of the present invention, the actuator includes a magnet attached to at least one side of the camera module, and a coil wound around an outer circumferential surface of the magnet and generating a magnetic field according to an input current have.

According to an aspect of another embodiment of the present invention, the actuator includes a first actuator configured to pivot the camera module in a first axis, and a second actuator configured to pivot the camera module in a second axis .

According to an aspect of another embodiment of the present invention, the first actuator includes a first magnet attached to one side of the camera module, and a first coil wound on an outer circumferential surface of the first magnet, The actuator may include a second magnet attached to the other side of the camera module and attached on a plane not identical to the first magnet, and a second coil wound on an outer circumferential surface of the second magnet.

According to another aspect of the present invention, the camera module assembly may further include a shake sensor attached to one side of the camera module.

According to the present invention having the above-described configuration, the configuration for shifting the image sensor or the lens unit in the camera module becomes unnecessary, thereby making it possible to reduce the thickness of the camera module.

In addition, when the power supply to the camera module is interrupted, the power of the camera module can be reduced because the camera module is automatically returned to the correct position by using the restoring force of the leaf spring.

Further, it becomes possible to manufacture a camera module assembly having an optical correction function, thereby reducing the number of parts, durability of the product, ease of assembly, and size / thickness reduction.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation device, a digital camera, May be included.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may be a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (DVF-H) And a Digital Broadcasting System (ISDB-T) (Integrated Services Digital Broadcast-Terrestrial). Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed in the camera (camera module assembly) 121 can be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141 and a shake sensor 142. The shake detection sensor is a component for detecting the shake of the mobile terminal (change in tilt with respect to the reference axis), and a gyro sensor or an acceleration sensor can be used.

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another or may be disposed integrally with each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') form a mutual layer structure, It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or in the vicinity thereof without mechanical contact using an electromagnetic force or an infrared ray. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch & The act of actually touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152 so that they may be classified as a part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or a suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, you can connect a device with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a device with an identification module, an audio input / A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the mobile terminal 100, or various command signals input by the user to the cradle may be transmitted It can be a passage to be transmitted to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

Hereinafter, a camera module assembly applied to a mobile terminal according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 9. FIG.

FIG. 3 is a perspective view of a camera module assembly according to the present invention, FIG. 4 is a perspective view of a camera module for explaining a tilt mechanism of a camera module according to the present invention, FIG. And FIG. 5 is a view for explaining a leaf spring structure for supporting the camera module according to the present invention. FIG. 6 is a view for explaining a modified example of the leaf spring applied to the present invention, and FIG. FIG. 8 is a view for explaining the entire mechanism of the shake correction according to the present invention. FIG. 8 is a view for explaining the movement of the plate spring in the shake correction according to the present invention. And comparing the spring shapes before and after the application.

2 is an exploded perspective view of a camera module assembly according to the present invention. As shown. A camera module assembly 200 applied to a mobile terminal according to an embodiment of the present invention includes upper and lower housings 11 and 12, first actuators 21 and 22, second actuators 31 and 32, an elastic member 40 A camera module 50, and a power supply FPCB 60 (Flexible Printed Circuit Board).

The housing (11, 12) is a member for forming an outer appearance of the camera module assembly (200), and has a space in which a camera module (50) can be embedded. The housing has a structure in which the upper housing 11 and the lower housing 12 are coupled.

The first actuators 21 and 22 include a first magnet 21 attached to one side of the camera module 50 and a first coil 22 wound at a predetermined interval from the outer circumferential surface of the magnet 21 . The first actuators 21 and 22 are components for rotating (tilting) the camera module 50 on the first axis.

The second actuators 31 and 32 include a second magnet 31 attached to the other side of the camera module 50 and a second coil 32 wound on the outer circumferential surface of the magnet 31. The second actuators 31 and 32 are components for rotating (tilting) the camera module 50 on the second axis. Here, the second magnet 31 is attached on a plane which is not the same as the first magnet 21. That is, the first magnet 31 and the second magnet 32 may be disposed at predetermined vertical intervals to prevent mutual interference between the magnetic forces generated by the first coil and the second coil. Alternatively, the first magnet 31 and the second magnet 32 may be disposed on the same plane. In this case, it is possible to contribute to the thinning of the camera module assembly. The positions of the first magnet 31 and the second magnet 32 can be variously changed and the camera module 50 can be positioned at a position where the camera module 50 can be tilted.

In the meantime, although the structure in which the coil is surrounded by the magnet is disclosed in the present embodiment, the present invention is not limited thereto, and the coil may be attached to the camera module, and the magnet may surround the coil.

 The elastic member 40 is a member for supporting the camera module 50 and includes a support portion 41 attached to the housing and a movable portion 42 for rotatably supporting the camera module 50, (40) may be used. The elastic member is not limited to the leaf spring, but may be a member having a restoring force for returning the camera module 50 to a predetermined position when the power input to the actuator is interrupted after the camera module 50 is tilted. For example, a wire spring may be used. The supporting portion 41 of the leaf spring 40 is fixed by the upper housing 11 and the lower housing 12. [

The camera module 50 is a member including a lens portion 51 and an image sensor (not shown). The optical signal input from the lens unit 51 is changed into an electrical signal through the image sensor. This electrical signal is converted to a digital signal via an analog-to-digital converter.

The camera module 50 may include a separate actuator for AF (Auto Focusing).

The power supply unit (power FPCB (Flexible Printed Circuit Board) 60 is a component for supplying power to the camera module, and may also provide an input current to the coil of the actuator.

The structure of the camera module assembly having no housing (11, 12) is also possible. That is, a structure in which a magnet and a coil are requested to the camera module and tilts the camera module according to the shake information can be disclosed.

3 is a perspective view of a camera module assembly according to the present invention. The camera module 50 with the magnets 21 and 31 attached to one side and the other side is supported by the movable portion 41 of the leaf spring 40 and the support portion 42 of the leaf spring 40 And is attached to the upper surface of the lower housing 12. As the camera module assembly 200 is assembled in this manner, the camera module 50 is rotatably supported on the leaf spring 40, and can be tilted by the first and second actuators.

The operation of tilting the camera module through FIG. 4 will be described in more detail.

4 is a perspective view of a camera module for explaining a tilt mechanism of a camera module according to the present invention. 4A is a view for explaining an operation in which the camera module is rotated in the first direction by the first actuators 21 and 22 and FIG. 4B is a view for explaining the operation of the camera module in the second direction by the second actuators 21 and 22 And Fig.

4A, when an input current is applied to the first coil 22, the electromagnetic force (electromagnetism) is generated by the permanent magnet (first magnet) 21 disposed on one side and the side opposite to the one side of the camera module 50 Lt; / RTI > This electromagnetic force is exerted by Fleming's left hand law in a first direction as shown. By this force, the camera module 50 is tilted (rotated) in the first direction about the rotation axis.

 4B, when an input current is applied to the second coil 32, the permanent magnet (second magnet) 31 disposed on the side opposite to the other side and the other side of the camera module 50 causes the electromagnetic force Lt; / RTI > This electromagnetic force is exerted by Fleming's left-hand rule in a second direction as shown. With this force, the camera module 50 is tilted (rotated) in the second direction around the rotation axis.

When the shake sensor detects the shake of the mobile terminal from the shake sensor, the controller 180 operates the first actuator and the second actuator to compensate for the shake, The image can be acquired.

That is, the shake detecting sensor 142 may include a first sensor for detecting shaking in the first direction and a second sensor for detecting shaking in the second direction. Therefore, the shake detecting sensor 142 can detect the shaking in the front-rear direction, the shaking in the left-right direction, and the combination shake thereof. Upon receiving the shake information from the shake detecting sensor 142, the controller 180 controls the first actuator and the second actuator to supply power for compensating for the shake. Accordingly, the camera module 50 is tilted in the reverse direction of the shake to compensate for the shaking in the front-rear direction, the shaking in the left-right direction, and the combination shake. Here, the first sensing sensor and the second sensing sensor are uniaxial sensing sensors. In place of the shake detecting sensor provided with the two detection sensors, a two-axis sensor (a device for detecting tilt in two axial directions) or a three-axis sensor (a device for detecting tilt in three axial directions) In this case, one sensor is sufficient.

5 is a view for explaining a leaf spring structure for supporting a camera module according to the present invention. FIG. 5A is a front view of a leaf spring for supporting a camera module according to the present invention, and FIG. 5B is a perspective view of a leaf spring for supporting a camera module according to the present invention.

The rectangular plate spring 40 includes a movable portion 41 to which the camera module 50 is attached, a support portion 42 supported by the housing, and a hinge portion 42 connecting the movable portion 41 and the support portion 42. [ (43).

The movable part 41 is a member deformed when an external force or a moment is applied. (X = F / k) proportional to the reciprocal of the spring constant with respect to the external force to which the normal spring acts, the leaf spring 40 is deformed by an arbitrary displacement with respect to the external force acting also. That is, the rotation part 41 of the leaf spring 40 is fixed to the camera module 50 so that when the leaf spring 41 is tilted, the camera module 50 is tilted accordingly.

The support portion 42 of the leaf spring is fixed to the upper and lower housings 11 and 12 and has a structure that is not rotated.

At this time, the initial position can always be maintained by using the restoring force of the leaf spring 40. When the power source is applied to the actuator for the sway correction, the rotation part 41 is tilted by the external force by the electromagnetic force (on state). When the application of the power supplied to the actuator is stopped (off state), the camera module 50 is restored to the initial correct position by the restoring force of the leaf spring. Accordingly, the power supply for restoring the camera module 50 to the initial position and the additional sensor are not necessary.

The hinge portions 43 are disposed at the respective sides of the quadrangle, and serve to connect the movable portion 41 and the support portion 42 together. The hinge part 43 is attached to the movable part 41 and deforms the other part of the movable part 41 when a part of the movable part is deformed.

 Hereinafter, a modification of the leaf spring will be described with reference to FIG.

6 is a view for explaining a modified example of the leaf spring applied to the present invention. Fig. 6 shows a square leaf spring with three hinge portions 43-1 - 43-3. Compared with the leaf spring having the four hinge portions shown in FIG. 5, the tripod effect causes much deformation with less force, and the camera module 50 can be attached stably.

In Fig. 6 (b), a circular plate spring is shown. This circular-shaped leaf spring can be used together with a cylindrical housing when the camera module is circular.

It will be apparent to those skilled in the art that various types of leaf springs may be used for ease of assembly of the internal components of the mobile terminal.

7 is a diagram for explaining the overall mechanism of camera shake correction according to the present invention. FIG. 7A is a view showing a state in which the camera ass'y is inclined by?. 7 (a), when the shaking motion of the user with respect to the mobile terminal 100 occurs more than a predetermined angle? Relative to the reference axis, the gyro sensor (shake sensor) And generates a shake signal. The controller 180 receiving the shaking signal applies power to the actuator. Then, an electromagnetic force is generated by the current input to the coil of the actuator and the permanent magnet (magnet) coupled with the coil, thereby tilting the camera module 50. At this time. The camera module 50 is tilted at the same angle (?) In the opposite direction in which the camera shake occurs (see Fig. 7B). Thus, the shake of the subject due to the camera-shake is corrected, and a stable image can be photographed

8 is a view for explaining the movement of the plate spring in the camera-shake correction according to the present invention.

 In the shake correction mechanism described in FIG. 7, the movement of the leaf spring 40 supporting the camera module 50 will be described with reference to FIG.

8 (a) shows the leaf spring 40 in a state in which the camera assembly 121 is inclined at a predetermined angle? About the reference axis. The movable portion 41 and the support portion 42 of the leaf spring 40 are inclined at a predetermined angle? About the reference axis as in the camera module assembly, as shown in FIG. 8 (a). When the control unit 180 receives the shake signal from the shake sensor and operates the actuator, the camera module 50 generates an external force. By this external force, the plate spring 40 is also deformed. At this time, as shown in FIG. 8 (b), the support portion 42 fixed by the housings 11 and 12 is maintained in a state in which the predetermined angle? Is inclined about the reference axis, (41) is corrected and tilted by the external force to maintain a state perpendicular to the reference axis.

9 is a diagram comparing spring shapes before and after power application for shake correction in the shake correction according to the present invention. 9 (a), when power is supplied to the actuator for shake correction, an external force is generated by the electromagnetic force of the coil and the permanent magnet, and the movable portion 41 of the leaf spring is deformed by the external force , The movable part (41) is tilted at a predetermined angle from the support part (42). Thereafter, when the power supply to the camera module 50 is stopped, the power supply to the actuator is also terminated. Then, the movable portion 41 tilted by the electromagnetic force is restored to the restoring force of the leaf spring 40 (see Fig. 9 (b)).

Accordingly, the camera module 50 supported by the movable unit 41 also returns to the home position without any additional power consumption.

Hereinafter, a method of acquiring images in a mobile terminal having the camera module assembly will be described in detail with reference to FIG.

FIG. 10 is a flowchart illustrating an image acquisition method in a mobile terminal according to an embodiment of the present invention.

The camera 121 of the mobile terminal 100 is turned on to acquire a preview image of the subject and display it on the display unit 151 (S1, S2) The shake sensor 142 detects the shake of the mobile terminal 100 when a shooting command is generated. The controller 180 applies power to the actuator in order to correct the shake, and the camera module 50 is rotated by the actuator in the direction opposite to the shaking motion to the same angle as the predetermined angle Tilt at an angle (S3, S4, S5). The shake is corrected as the camera module 50 is tilted, and the corrected image is acquired and stored in the memory 160 (S6). Thereafter, the corrected image may be transmitted to an external device (external server or terminal) through the wireless communication unit 110 according to the user's selection (S7). When the camera module 50 is turned off and the power supplied to the actuator is turned off, the tilted camera module 50 is rotated by the elastic force of the elastic member (leaf spring) 40 supporting the camera module 50 50) returns to the home position.

Further, according to an embodiment of the present invention, the above-described method can be implemented as a code that can be read by a processor on a medium on which the program is recorded. Examples of the medium on which the processor can read are ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc. and can be implemented in the form of a carrier wave (e.g., transmission over the Internet) have.

The image acquisition method using the mobile terminal and the mobile terminal having the shake correction function as described above can be applied to a configuration and a method of the embodiments described above in a limited manner, All or some of the embodiments may be selectively combined.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention;

2 is an exploded perspective view of a camera module assembly according to the present invention;

3 is a perspective view of a camera module assembly according to the present invention.

4 is a perspective view of a camera module for explaining a tilt mechanism of a camera module according to the present invention.

5 is a view for explaining a leaf spring structure for supporting a camera module according to the present invention.

6 is a view for explaining a modified example of the leaf spring applied to the present invention.

7 is a diagram for explaining the overall mechanism of camera-shake correction according to the present invention.

8 is a view for explaining the movement of the plate spring in the camera-shake correction according to the present invention.

9 is a diagram comparing spring shapes before and after power application for shake correction in the shake correction according to the present invention.

10 is a flowchart illustrating an image acquisition method in a mobile terminal according to an embodiment of the present invention.

Claims (19)

A camera module, disposed in the mobile terminal, for acquiring an image of a subject; A shake sensor for detecting a shake of the mobile terminal and outputting a shake signal; An actuator for tilting the camera module; And And a controller for driving the actuator to tilt the camera module when the camera module is turned on and a shake signal output from the shake sensor is received, Wherein the actuator comprises a first actuator for tilting the camera module in a first direction and a second actuator for tilting the camera module in a second direction different from the first direction, Wherein the first actuator and the second actuator are disposed so as to be spaced apart in the vertical direction. The method according to claim 1, Further comprising an elastic member configured to support the camera module. 3. The method of claim 2, Further comprising a housing into which the camera module is inserted, Wherein the elastic member includes a leaf spring, The leaf spring A movable part to which the camera module is attached, And a support attached to the housing. The method according to claim 1, Wherein the first actuator is disposed so as not to overlap with the second actuator in a horizontal direction perpendicular to the up and down direction. The method according to claim 1, The first actuator includes: A first magnet positioned at an upper portion of a first outer surface of the camera module and at an upper portion of a second outer surface located opposite the first outer surface; And And a first coil facing the first magnet, Wherein the second actuator comprises: A second magnet positioned at a lower portion of a third outer side surface adjacent to the first outer side surface of the camera module and a lower portion of a fourth outer side surface located opposite to the third outer side surface; And And a second coil facing the second magnet. delete 6. The method of claim 5, Further comprising a power supply for supplying power to the camera module, And an input current is provided to the first coil and the second coil through the power supply unit. The method according to claim 1, Wherein, And drives the actuator such that the camera module is tilted by the swinging angle in a direction opposite to the swinging direction when the swing angle and the swinging direction of the mobile terminal are detected by the swinging sensor. The method according to claim 1, And a wired / wireless communication unit configured to wirelessly transmit the image obtained from the camera module to the outside. Acquiring an image of a subject through a camera module of the mobile terminal; Detecting a shake of the mobile terminal and outputting a shake signal through a shake sensor of the mobile terminal; And And driving the actuator of the mobile terminal based on the shake signal to tilt the camera module, Wherein the actuator comprises a first actuator for tilting the camera module in a first direction and a second actuator for tilting the camera module in a second direction different from the first direction, Wherein the first actuator and the second actuator are disposed so as to be spaced apart in the vertical direction. 11. The method of claim 10, The step of driving the actuator of the mobile terminal based on the shake signal to tilt the camera module to correct the shake, And tilting the camera module by the shaking angle in a direction opposite to the shaking direction when the shaking angle and direction of the mobile terminal are detected by the shaking sensor. 11. The method of claim 10, Further comprising returning the camera module to an original position by an elastic force of an elastic member supporting the camera module when the power supplied to the actuator is turned off. A camera module for acquiring an image of a subject; An actuator for tilting the camera module; And And a power supply unit for supplying power to the actuator, Wherein the actuator comprises a first actuator for tilting the camera module in a first direction and a second actuator for tilting the camera module in a second direction different from the first direction, Wherein the first actuator and the second actuator are disposed so as to be spaced apart from each other in the vertical direction. 14. The method of claim 13, Further comprising an elastic member for supporting the camera module. 15. The method of claim 14, Further comprising a housing into which the camera module is inserted, Wherein the elastic member includes a leaf spring, The leaf spring A movable part to which the camera module is attached, And a support portion attached to the housing. 14. The method of claim 13, Wherein the first actuator is disposed so as not to overlap with the second actuator in a horizontal direction perpendicular to the up and down direction. The method of claim 13, The first actuator includes: A first magnet positioned at an upper portion of a first outer surface of the camera module and at an upper portion of a second outer surface located opposite the first outer surface; And And a first coil facing the first magnet, Wherein the second actuator comprises: A second magnet positioned at a lower portion of a third outer side surface adjacent to the first outer side surface of the camera module and a lower portion of a fourth outer side surface located opposite to the third outer side surface; And And a second coil facing the second magnet. delete 14. The method of claim 13, Further comprising a blur detection sensor attached to one side of the camera module.

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