Patent Publication Number: US-2019179132-A1

Title: Electronic device having camera device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This Application claims the priority benefit under 35 U.S.C. § 119(e) to U.S. Provisional Application No. 62/595,592 filed on Dec. 7, 2017, and under 35 U.S.C. § 119(a) to Korean Patent Application No. 10-2018-0051961 filed in the Republic of Korea on May 4, 2018, all of which are hereby expressly incorporated by reference into the present application. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present disclosure relates to an electronic device having a camera device reduced in width. 
     2. Discussion of the Related Art 
     Terminals may be divided into a mobile terminal (mobile/portable terminal) and a stationary terminal. The mobile terminal may be divided into a handheld terminal and a vehicle mounted terminal. 
     The functions of mobile terminals are diversified. For example, there are functions of data and voice communication, photographing and video shooting through a camera, voice recording, music file playback through a speaker system, and outputting an image or video to a display unit. Some terminals are equipped with an electronic game play function or a multimedia player function. In particular, modern mobile terminals may receive multicast signals that provide visual content such as broadcast, video or television programs. 
     As functions are diversified, terminals are implemented in the form of multimedia devices supporting composite functions such as photographing or video shooting, music or video file playback, playing games, receiving broadcast, and the like. Further, in order to support and enhance the functions of the terminal, improvement of a structural and/or software part of the terminal may be considered. 
     In recent years, as various functions of electronic devices such as a mobile terminal and a fixed terminal have been developed, technical research have been conducted to minimize an area occupied by a bezel portion in order to increase the area of a display unit. However, since a plurality of electronic components are disposed in the bezel portion, there is a limitation in a reduction of the bezel portion as long as the volume of the electronic components is maintained. 
     SUMMARY OF THE INVENTION 
     Therefore, an aspect of the detailed description is to provide a camera device having a shape deformed to be disposed in a reduced bezel portion and an electronic device having the same. 
     According to one aspect of the present invention, a portion not used for forming an image in a liquid lens is utilized as a support region of a certain component. 
     To achieve these and other advantages and in accordance with the purpose of this specification, as embodied and broadly described herein, a camera device includes: a first lens unit concentrating light incident from a front side; a liquid lens unit disposed on a rear side of the first lens unit and controlling an optical path of light by adjusting curvature according to an electrical signal; a second lens unit disposed on a rear side of the liquid lens unit; an image sensor on which light passing through the second lens unit forms an image; and a flexible printed circuit board (FPCB) transferring the electrical signal to the liquid lens unit, wherein the liquid lens unit includes a first region allowing light, which is to form an image on the image sensor, to be transmitted therethrough and a second region surrounding the first region and the FPCB is disposed in the second region and overlaps the liquid lens unit in a thickness direction. According to this structure, a width occupied by the FPCB may be reduced, minimizing a lateral thickness of the camera device. 
     To achieve these and other advantages and in accordance with the purpose of this specification, as embodied and broadly described herein, a camera device includes: a lens assembly disposed inside the lens cover and including a liquid lens unit controlling an optical path of light incident from a front side according to an applied electrical signal; an image sensor overlapping the lens assembly and forming an image using light passing through the lens assembly; and an FPCB transferring the electrical signal to the liquid lens unit, wherein the liquid lens unit includes a first region allowing light, which is to form an image on the image sensor, to be transmitted therethrough and a second region surrounding the first region, and the FPCB may be disposed in the second region and overlaps the liquid lens unit in a thickness direction. 
     To achieve these and other advantages and in accordance with the purpose of this specification, as embodied and broadly described herein, an electronic device includes: a display unit; a bezel portion surrounding the display unit; and a camera device disposed in the bezel portion, wherein the camera device includes: a lens cover forming an appearance of the camera device and having a pair of flat surfaces facing each other and a lens assembly disposed inside the lens cover and including a liquid lens unit controlling an optical path of light incident from a front side according to an applied electrical signal; an image sensor overlapping the lens assembly and forming an image using light passing through the lens assembly; and an FPCB transferring the electrical signal to the liquid lens unit, wherein the liquid lens unit includes a first region allowing light, which is to form an image on the image sensor, to be transmitted therethrough and a second region surrounding the first region, the FPCB may be disposed in the second region and overlaps the liquid lens unit in a thickness direction, and one of the pair of flat surfaces facing each other may be disposed to be adjacent to the display unit. 
     Effects of the camera device and the electronic device having the camera device according to the present invention will be described as follows. According to the present invention, since the FPCB for applying an electrical signal to the liquid lens unit is disposed to overlap the liquid lens unit in the thickness direction, the width of the camera device may be reduced. 
     According to at least one of the embodiments of the present invention, since the outer surface of the camera device is formed to be flat, a space between the display unit and the outer edge of the terminal body and the camera device can be minimized to reduce the thickness of the bezel portion. In addition, the camera device in which a flare phenomenon is reduced by the masking portion formed on the FPCB can be provided. 
     An additional scope of applicability of the present invention shall become obvious from the detailed description in the following. It is to be understood that both the foregoing general description and the following detailed description of the preferred embodiments of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
     Further scope of applicability of the present application will become more apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the scope of the invention will become apparent to those skilled in the art from the detailed description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments and together with the description serve to explain the principles of the invention. 
       In the drawings: 
         FIG. 1A  is a block diagram illustrating a mobile terminal according to the present disclosure. 
         FIGS. 1B and 1C  are conceptual views illustrating an example of a mobile terminal according to the present disclosure, viewed in different directions. 
         FIG. 2A  is a view of a camera device viewed in one direction. 
         FIG. 2B  is a cross-sectional view of the camera device of  FIG. 2A , taken along line A-A. 
         FIG. 3  is a conceptual view illustrating a liquid lens. 
         FIG. 4A  is a plan view illustrating a liquid lens unit in which a flexible printed circuit board (FPCB) of the present disclosure is positioned. 
         FIG. 4B  is a side view of a liquid lens unit in which the FPCB illustrated in  FIG. 4B  is positioned. 
         FIGS. 5A and 5B  are conceptual views illustrating an example of a liquid lens unit in which the FPCB illustrated in  FIG. 4A  is positioned. 
         FIGS. 6A, 6B and 6C  are conceptual views illustrating another example of a liquid lens unit in which the FPCB illustrated in  FIG. 4A  is positioned. 
         FIG. 7  is a conceptual view illustrating a modification of a liquid lens unit in which the FPCB illustrated in  FIG. 4A  is positioned. 
         FIGS. 8A and 8B  are conceptual views illustrating another modification of a liquid lens unit in which the FPCB illustrated in  FIG. 4A  is positioned. 
         FIG. 9  is a conceptual view illustrating an infrared cut filter according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Description will now be given in detail according to exemplary embodiments disclosed herein, with reference to the accompanying drawings. For the sake of brief description with reference to the drawings, the same or equivalent components may be provided with the same or similar reference numbers, and description thereof will not be repeated. In general, a suffix such as “module” and “unit” may be used to refer to elements or components. Use of such a suffix herein is merely intended to facilitate description of the specification, and the suffix itself is not intended to give any special meaning or function. The accompanying drawings are used to help easily understand various technical features and it should be understood that the embodiments presented herein are not limited by the accompanying drawings. As such, the present disclosure should be construed to extend to any alterations, equivalents and substitutes in addition to those which are particularly set out in the accompanying drawings. 
     Mobile terminals presented herein may be implemented using a variety of different types of terminals. Examples of such terminals include cellular phones, smart phones, user equipment, laptop computers, digital broadcast terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigators, portable computers (PCs), slate PCs, tablet PCs, ultra books, wearable devices (for example, smart watches, smart glasses, head mounted displays (HMDs)), and the like. 
     By way of non-limiting example only, further description will be made with reference to particular types of mobile terminals. However, such teachings apply equally to other types of terminals, such as those types noted above. In addition, these teachings may also be applied to stationary terminals such as digital TV, desktop computers, and the like. That is, the present invention mainly describes a mobile terminal, which is described as an example of an electronic device including a fixed terminal. 
     Reference is now made to  FIGS. 1A-1C , where  FIG. 1A  is a block diagram of a mobile terminal in accordance with the present disclosure, and  FIGS. 1B and 1C  are conceptual views of one example of the mobile terminal, viewed from different directions. The mobile terminal  100  is shown having components such as a wireless communication unit  110 , an input unit  120 , a sensing unit  140 , an output unit  150 , an interface unit  160 , a memory  170 , a controller  180 , and a power supply unit  190 . Implementing all of the illustrated components is not a requirement, and that greater or fewer components may alternatively be implemented. 
     The wireless communication unit  110  typically includes one or more modules which permit communications such as wireless communications between the mobile terminal  100  and a wireless communication system, communications between the mobile terminal  100  and another mobile terminal, communications between the mobile terminal  100  and an external server. 
     Further, the wireless communication unit  110  typically includes one or more modules which connect the mobile terminal  100  to one or more networks. To facilitate such communications, the wireless communication unit  110  includes one or more of 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 input unit  120  includes a camera  121  for obtaining images or video, a microphone  122 , which is one type of audio input device for inputting an audio signal, and a user input unit  123  (for example, a touch key, a push key, a mechanical key, a soft key, and the like) for allowing a user to input information. Data (for example, audio, video, image, and the like) is obtained by the input unit  120  and may be analyzed and processed by controller  180  according to device parameters, user commands, and combinations thereof. 
     The sensing unit  140  is typically implemented using one or more sensors configured to sense internal information of the mobile terminal, the surrounding environment of the mobile terminal, user information, and the like. For example, in  FIG. 1A , the sensing unit  140  is shown having a proximity sensor  141  and an illumination sensor  142 . If desired, the sensing unit  140  may alternatively or additionally include other types of sensors or devices, such as a touch sensor, an acceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared (IR) sensor, a finger scan sensor, a ultrasonic sensor, an optical sensor (for example, camera  121 ), a microphone  122 , a battery gauge, an environment sensor (for example, a barometer, a hygrometer, a thermometer, a radiation detection sensor, a thermal sensor, and a gas sensor, among others), and a chemical sensor (for example, an electronic nose, a health care sensor, a biometric sensor, and the like), to name a few. The mobile terminal  100  may be configured to utilize information obtained from sensing unit  140 , and in particular, information obtained from one or more sensors of the sensing unit  140 , and combinations thereof. 
     The output unit  150  is typically configured to output various types of information, such as audio, video, tactile output, and the like. The output unit  150  is shown having a display unit  151 , an audio output module  152 , a haptic module  153 , and an optical output module  154 . 
     The display unit  151  may have an inter-layered structure or an integrated structure with a touch sensor in order to facilitate a touch screen. The touch screen may provide an output interface between the mobile terminal  100  and a user, as well as function as the user input unit  123  which provides an input interface between the mobile terminal  100  and the user. 
     The interface unit  160  serves as an interface with various types of external devices that can be coupled to the mobile terminal  100 . The interface unit  160 , for example, may include any of wired or wireless ports, external power supply ports, wired or wireless data ports, memory card ports, ports for connecting a device having an identification module, audio input/output (I/O) ports, video I/O ports, earphone ports, and the like. In some cases, the mobile terminal  100  may perform assorted control functions associated with a connected external device, in response to the external device being connected to the interface unit  160 . 
     The memory  170  is typically implemented to store data to support various functions or features of the mobile terminal  100 . For instance, the memory  170  may be configured to store application programs executed in the mobile terminal  100 , data or instructions for operations of the mobile terminal  100 , and the like. Some of these application programs may be downloaded from an external server via wireless communication. Other application programs may be installed within the mobile terminal  100  at time of manufacturing or shipping, which is typically the case for basic functions of the mobile terminal  100  (for example, receiving a call, placing a call, receiving a message, sending a message, and the like). It is common for application programs to be stored in the memory  170 , installed in the mobile terminal  100 , and executed by the controller  180  to perform an operation (or function) for the mobile terminal  100 . 
     The controller  180  typically functions to control overall operation of the mobile terminal  100 , in addition to the operations associated with the application programs. The controller  180  can provide or process information or functions appropriate for a user by processing signals, data, information and the like, which are input or output by the various components depicted in  FIG. 1A , or activating application programs stored in the memory  170 . As one example, the controller  180  controls some or all of the components illustrated in  FIGS. 1A-1C  according to the execution of an application program that have been stored in the memory  170 . 
     The power supply unit  190  can be configured to receive external power or provide internal power in order to supply appropriate power required for operating elements and components included in the mobile terminal  100 . The power supply unit  190  may include a battery, and the battery may be configured to be embedded in the terminal body, or configured to be detachable from the terminal body. 
     At least some of the above components may operate in a cooperating manner, so as to implement an operation or a control method of a glass type terminal according to various embodiments to be explained later. The operation or the control method of the glass type terminal may be implemented on the glass type terminal by driving at least one application program stored in the memory  170 . 
     Referring still to  FIG. 1A , various components depicted in this figure will now be described in more detail. Regarding the wireless communication unit  110 , the broadcast receiving module  111  is typically configured to receive a broadcast signal and/or broadcast associated information from an external broadcast managing entity via a broadcast channel. The broadcast channel may include a satellite channel, a terrestrial channel, or both. In some embodiments, two or more broadcast receiving modules  111  may be utilized to facilitate simultaneously receiving of two or more broadcast channels, or to support switching among broadcast channels. 
     The mobile communication module  112  can transmit and/or receive wireless signals to and from one or more network entities. Typical examples of a network entity include a base station, an external mobile terminal, a server, and the like. Such network entities form part of a mobile communication network, which is constructed according to technical standards or communication methods for mobile communications (for example, Global System for Mobile Communication (GSM), Code Division Multi Access (CDMA), CDMA2000 (Code Division Multi Access 2000), EV-DO (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), Wideband CDMA (WCDMA), High Speed Downlink Packet access (HSDPA), HSUPA (High Speed Uplink Packet Access), Long Term Evolution (LTE), LTE-A (Long Term Evolution-Advanced), and the like). Examples of wireless signals transmitted and/or received via the mobile communication module  112  include audio call signals, video (telephony) call signals, or various formats of data to support communication of text and multimedia messages. 
     The wireless Internet module  113  is configured to facilitate wireless Internet access. This module may be internally or externally coupled to the mobile terminal  100 . The wireless Internet module  113  may transmit and/or receive wireless signals via communication networks according to wireless Internet technologies. Examples of such wireless Internet access include Wireless LAN (WLAN), Wireless Fidelity (Wi-Fi), Wi-Fi Direct, Digital Living Network Alliance (DLNA), Wireless Broadband (WiBro), Worldwide Interoperability for Microwave Access (WiMAX), High Speed Downlink Packet Access (HSDPA), HSUPA (High Speed Uplink Packet Access), Long Term Evolution (LTE), LTE-A (Long Term Evolution-Advanced), and the like. The wireless Internet module  113  may transmit/receive data according to one or more of such wireless Internet technologies, and other Internet technologies as well. 
     In some embodiments, when the wireless Internet access is implemented according to, for example, WiBro, HSDPA,HSUPA, GSM, CDMA, WCDMA, LTE, LTE-A and the like, as part of a mobile communication network, the wireless Internet module  113  performs such wireless Internet access. As such, the Internet module  113  may cooperate with, or function as, the mobile communication module  112 . 
     The short-range communication module  114  is configured to facilitate short-range communications. Suitable technologies for implementing such short-range communications include BLUETOOTH™, Radio Frequency IDentification (RFID), Infrared Data Association (IrDA), Ultra-WideBand (UWB), ZigBee, Near Field Communication (NFC), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, Wireless USB (Wireless Universal Serial Bus), and the like. The short-range communication module  114  in general supports wireless communications between the mobile terminal  100  and a wireless communication system, communications between the mobile terminal  100  and another mobile terminal  100 , or communications between the mobile terminal and a network where another mobile terminal  100  (or an external server) is located, via wireless area networks. One example of the wireless area networks is a wireless personal area networks. 
     In some embodiments, another mobile terminal (which may be configured similarly to mobile terminal  100 ) may be a wearable device, for example, a smart watch, a smart glass or a head mounted display (HMD), which can exchange data with the mobile terminal  100  (or otherwise cooperate with the mobile terminal  100 ). The short-range communication module  114  may sense or recognize the wearable device, and permit communication between the wearable device and the mobile terminal  100 . In addition, when the sensed wearable device is a device which is authenticated to communicate with the mobile terminal  100 , the controller  180 , for example, may cause transmission of data processed in the mobile terminal  100  to the wearable device via the short-range communication module  114 . Hence, a user of the wearable device may use the data processed in the mobile terminal  100  on the wearable device. For example, when a call is received in the mobile terminal  100 , the user may answer the call using the wearable device. Also, when a message is received in the mobile terminal  100 , the user can check the received message using the wearable device. 
     The location information module  115  is generally configured to detect, calculate, derive or otherwise identify a position of the mobile terminal. As an example, the location information module  115  includes a Global Position System (GPS) module, a Wi-Fi module, or both. If desired, the location information module  115  may alternatively or additionally function with any of the other modules of the wireless communication unit  110  to obtain data related to the position of the mobile terminal. 
     As one example, when the mobile terminal uses a GPS module, a position of the mobile terminal may be acquired using a signal sent from a GPS satellite. As another example, when the mobile terminal uses the Wi-Fi module, a position of the mobile terminal can be acquired based on information related to a wireless access point (AP) which transmits or receives a wireless signal to or from the Wi-Fi module. 
     The input unit  120  may be configured to permit various types of input to the mobile terminal  120 . Examples of such input include audio, image, video, data, and user input. Image and video input is often obtained using one or more cameras  121 . Such cameras  121  may process image frames of still pictures or video obtained by image sensors in a video or image capture mode. The processed image frames can be displayed on the display unit  151  or stored in memory  170 . In some cases, the cameras  121  may be arranged in a matrix configuration to permit a plurality of images having various angles or focal points to be input to the mobile terminal  100 . As another example, the cameras  121  may be located in a stereoscopic arrangement to acquire left and right images for implementing a stereoscopic image. 
     The microphone  122  is generally implemented to permit audio input to the mobile terminal  100 . The audio input can be processed in various manners according to a function being executed in the mobile terminal  100 . If desired, the microphone  122  may include assorted noise removing algorithms to remove unwanted noise generated in the course of receiving the external audio. 
     The user input unit  123  is a component that permits input by a user. Such user input may enable the controller  180  to control operation of the mobile terminal  100 . The user input unit  123  may include one or more of a mechanical input element (for example, a key, a button located on a front and/or rear surface or a side surface of the mobile terminal  100 , a dome switch, a jog wheel, a jog switch, and the like), or a touch-sensitive input, among others. As one example, the touch-sensitive input may be a virtual key or a soft key, which is displayed on a touch screen through software processing, or a touch key which is located on the mobile terminal at a location that is other than the touch screen. Further, the virtual key or the visual key may be displayed on the touch screen in various shapes, for example, graphic, text, icon, video, or a combination thereof. 
     The sensing unit  140  is generally configured to sense one or more of internal information of the mobile terminal, surrounding environment information of the mobile terminal, user information, or the like. The controller  180  generally cooperates with the sending unit  140  to control operation of the mobile terminal  100  or execute data processing, a function or an operation associated with an application program installed in the mobile terminal based on the sensing provided by the sensing unit  140 . The sensing unit  140  may be implemented using any of a variety of sensors, some of which will now be described in more detail. 
     The proximity sensor  141  may include a sensor to sense presence or absence of an object approaching a surface, or an object located near a surface, by using an electromagnetic field, infrared rays, or the like without a mechanical contact. The proximity sensor  141  may be arranged at an inner region of the mobile terminal covered by the touch screen, or near the touch screen. 
     The proximity sensor  141 , for example, may include any of a transmissive type photoelectric sensor, a direct reflective type photoelectric sensor, a mirror reflective type photoelectric sensor, a high-frequency oscillation proximity sensor, a capacitance type proximity sensor, a magnetic type proximity sensor, an infrared rays proximity sensor, and the like. When the touch screen is implemented as a capacitance type, the proximity sensor  141  can sense proximity of a pointer relative to the touch screen by changes of an electromagnetic field, which is responsive to an approach of an object with conductivity. In this instance, the touch screen (touch sensor) may also be categorized as a proximity sensor. 
     The term “proximity touch” will often be referred to herein to denote the scenario in which a pointer is positioned to be proximate to the touch screen without contacting the touch screen. The term “contact touch” will often be referred to herein to denote the scenario in which a pointer makes physical contact with the touch screen. For the position corresponding to the proximity touch of the pointer relative to the touch screen, such position will correspond to a position where the pointer is perpendicular to the touch screen. The proximity sensor  141  may sense proximity touch, and proximity touch patterns (for example, distance, direction, speed, time, position, moving status, and the like). In general, controller  180  processes data corresponding to proximity touches and proximity touch patterns sensed by the proximity sensor  141 , and cause output of visual information on the touch screen. In addition, the controller  180  can control the mobile terminal  100  to execute different operations or process different data according to whether a touch with respect to a point on the touch screen is either a proximity touch or a contact touch. 
     A touch sensor can sense a touch applied to the touch screen, such as display unit  151 , using any of a variety of touch methods. Examples of such touch methods include a resistive type, a capacitive type, an infrared type, and a magnetic field type, among others. As one example, the touch sensor may be configured to convert changes of pressure applied to a specific part of the display unit  151 , or convert capacitance occurring at a specific part of the display unit  151 , into electric input signals. The touch sensor may also be configured to sense not only a touched position and a touched area, but also touch pressure and/or touch capacitance. A touch object is generally used to apply a touch input to the touch sensor. Examples of typical touch objects include a finger, a touch pen, a stylus pen, a pointer, or the like. 
     When a touch input is sensed by a touch sensor, corresponding signals may be transmitted to a touch controller. The touch controller may process the received signals, and then transmit corresponding data to the controller  180 . Accordingly, the controller  180  can sense which region of the display unit  151  has been touched. Here, the touch controller may be a component separate from the controller  180 , the controller  180 , and combinations thereof. 
     In some embodiments, the controller  180  can execute the same or different controls according to a type of touch object that touches the touch screen or a touch key provided in addition to the touch screen. Whether to execute the same or different control according to the object which provides a touch input may be decided based on a current operating state of the mobile terminal  100  or a currently executed application program, for example. 
     The touch sensor and the proximity sensor may be implemented individually, or in combination, to sense various types of touches. Such touches includes a short (or tap) touch, a long touch, a multi-touch, a drag touch, a flick touch, a pinch-in touch, a pinch-out touch, a swipe touch, a hovering touch, and the like. 
     If desired, an ultrasonic sensor may be implemented to recognize position information relating to a touch object using ultrasonic waves. The controller  180 , for example, can calculate a position of a wave generation source based on information sensed by an illumination sensor and a plurality of ultrasonic sensors. Since light is much faster than ultrasonic waves, the time for which the light reaches the optical sensor is much shorter than the time for which the ultrasonic wave reaches the ultrasonic sensor. The position of the wave generation source can be calculated using this fact. For instance, the position of the wave generation source can be calculated using the time difference from the time that the ultrasonic wave reaches the sensor based on the light as a reference signal. 
     The camera  121  typically includes at least one a camera sensor (CCD, CMOS etc.), a photo sensor (or image sensors), and a laser sensor. Implementing the camera  121  with a laser sensor may allow detection of a touch of a physical object with respect to a  3 D stereoscopic image. The photo sensor may be laminated on, or overlapped with, the display device. The photo sensor may be configured to scan movement of the physical object in proximity to the touch screen. In more detail, the photo sensor may include photo diodes and transistors at rows and columns to scan content received at the photo sensor using an electrical signal which changes according to the quantity of applied light. Namely, the photo sensor may calculate the coordinates of the physical object according to variation of light to thus obtain position information of the physical object. 
     The display unit  151  is generally configured to output information processed in the mobile terminal  100 . For example, the display unit  151  can display execution screen information of an application program executing at the mobile terminal  100  or user interface (UI) and graphic user interface (GUI) information in response to the execution screen information. In some embodiments, the display unit  151  may be implemented as a stereoscopic display unit for displaying stereoscopic images. A typical stereoscopic display unit may employ a stereoscopic display scheme such as a stereoscopic scheme (a glass scheme), an auto-stereoscopic scheme (glassless scheme), a projection scheme (holographic scheme), or the like. 
     The audio output module  152  is generally configured to output audio data. Such audio data may be obtained from any of a number of different sources, such that the audio data may be received from the wireless communication unit  110  or may have been stored in the memory  170 . The audio data may be output during modes such as a signal reception mode, a call mode, a record mode, a voice recognition mode, a broadcast reception mode, and the like. The audio output module  152  can provide audible output related to a particular function (e.g., a call signal reception sound, a message reception sound, etc.) performed by the mobile terminal  100 . The audio output module  152  may also be implemented as a receiver, a speaker, a buzzer, or the like. 
     A haptic module  153  can be configured to generate various tactile effects that a user feels, perceive, or otherwise experience. A typical example of a tactile effect generated by the haptic module  153  is vibration. The strength, pattern and the like of the vibration generated by the haptic module  153  can be controlled by user selection or setting by the controller. For example, the haptic module  153  may output different vibrations in a combining manner or a sequential manner. 
     Besides vibration, the haptic module  153  can generate various other tactile effects, including an effect by stimulation such as a pin arrangement vertically moving to contact skin, a spray force or suction force of air through a jet orifice or a suction opening, a touch to the skin, a contact of an electrode, electrostatic force, an effect by reproducing the sense of cold and warmth using an element that can absorb or generate heat, and the like. 
     The haptic module  153  can also be implemented to allow the user to feel a tactile effect through a muscle sensation such as the user&#39;s fingers or arm, as well as transferring the tactile effect through direct contact. Two or more haptic modules  153  may be provided according to the particular configuration of the mobile terminal  100 . 
     An optical output module  154  can output a signal for indicating an event generation using light of a light source. Examples of events generated in the mobile terminal  100  may include message reception, call signal reception, a missed call, an alarm, a schedule notice, an email reception, information reception through an application, and the like. 
     A signal output by the optical output module  154  may be implemented so the mobile terminal emits monochromatic light or light with a plurality of colors. The signal output may be terminated as the mobile terminal senses that a user has checked the generated event, for example. 
     The interface unit  160  serves as an interface for external devices to be connected with the mobile terminal  100 . For example, the interface unit  160  can receive data transmitted from an external device, receive power to transfer to elements and components within the mobile terminal  100 , or transmit internal data of the mobile terminal  100  to such external device. The interface unit  160  may include wired or wireless headset ports, external power supply ports, wired or wireless data ports, memory card ports, ports for connecting a device having an identification module, audio input/output (I/O) ports, video I/O ports, earphone ports, or the like. 
     The identification module may be a chip that stores various information for authenticating authority of using the mobile terminal  100  and may include a user identity module (UIM), a subscriber identity module (SIM), a universal subscriber identity module (USIM), and the like. In addition, the device having the identification module (also referred to herein as an “identifying device”) may take the form of a smart card. Accordingly, the identifying device can be connected with the terminal  100  via the interface unit  160 . 
     When the mobile terminal  100  is connected with an external cradle, the interface unit  160  can serve as a passage to allow power from the cradle to be supplied to the mobile terminal  100  or may serve as a passage to allow various command signals input by the user from the cradle to be transferred to the mobile terminal there through. Various command signals or power input from the cradle may operate as signals for recognizing that the mobile terminal is properly mounted on the cradle. 
     The memory  170  can store programs to support operations of the controller  180  and store input/output data (for example, phonebook, messages, still images, videos, etc.). The memory  170  may store data related to various patterns of vibrations and audio which are output in response to touch inputs on the touch screen. 
     The memory  170  may include one or more types of storage mediums including a Flash memory, a hard disk, a solid state disk, a silicon disk, a multimedia card micro type, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read-Only Memory (ROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Programmable Read-Only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. The mobile terminal  100  may also be operated in relation to a network storage device that performs the storage function of the memory  170  over a network, such as the Internet. 
     The controller  180  can typically control the general operations of the mobile terminal  100 . For example, the controller  180  can set or release a lock state for restricting a user from inputting a control command with respect to applications when a status of the mobile terminal meets a preset condition. 
     The controller  180  can also perform the controlling and processing associated with voice calls, data communications, video calls, and the like, or perform pattern recognition processing to recognize a handwriting input or a picture drawing input performed on the touch screen as characters or images, respectively. In addition, the controller  180  can control one or a combination of those components in order to implement various exemplary embodiments disclosed herein. 
     The power supply unit  190  receives external power or provide internal power and supply the appropriate power required for operating respective elements and components included in the mobile terminal  100 . The power supply unit  190  may include a battery, which is typically rechargeable or be detachably coupled to the terminal body for charging. 
     The power supply unit  190  may include a connection port. The connection port may be configured as one example of the interface unit  160  to which an external charger for supplying power to recharge the battery is electrically connected. As another example, the power supply unit  190  may be configured to recharge the battery in a wireless manner without use of the connection port. In this example, the power supply unit  190  can receive power, transferred from an external wireless power transmitter, using at least one of an inductive coupling method which is based on magnetic induction or a magnetic resonance coupling method which is based on electromagnetic resonance. Various embodiments described herein may be implemented in a computer-readable medium, a machine-readable medium, or similar medium using, for example, software, hardware, or any combination thereof. 
     Referring now to  FIGS. 1B and 1C , the mobile terminal  100  is described with reference to a bar-type terminal body. However, the mobile terminal  100  may alternatively be implemented in any of a variety of different configurations. Examples of such configurations include watch-type, clip-type, glasses-type, or as a folder-type, flip-type, slide-type, swing-type, and swivel-type in which two and more bodies are combined with each other in a relatively movable manner, and combinations thereof. Discussion herein will often relate to a particular type of mobile terminal (for example, bar-type, watch-type, glasses-type, and the like). However, such teachings with regard to a particular type of mobile terminal will generally apply to other types of mobile terminals as well. 
     The mobile terminal  100  will generally include a case (for example, frame, housing, cover, and the like) forming the appearance of the terminal. In this embodiment, the case is formed using a front case  101  and a rear case  102 . Various electronic components are incorporated into a space formed between the front case  101  and the rear case  102 . At least one middle case may be additionally positioned between the front case  101  and the rear case  102 . 
     The display unit  151  is shown located on the front side of the terminal body to output information. As illustrated, a window  151   a  of the display unit  151  may be mounted to the front case  101  to form the front surface of the terminal body together with the front case  101 . In some embodiments, electronic components may also be mounted to the rear case  102 . Examples of such electronic components include a detachable battery  191 , an identification module, a memory card, and the like. Rear cover  103  is shown covering the electronic components, and this cover may be detachably coupled to the rear case  102 . Therefore, when the rear cover  103  is detached from the rear case  102 , the electronic components mounted to the rear case  102  are externally exposed. 
     As illustrated, when the rear cover  103  is coupled to the rear case  102 , a side surface of the rear case  102  is partially exposed. In some cases, upon the coupling, the rear case  102  may also be completely shielded by the rear cover  103 . In some embodiments, the rear cover  103  may include an opening for externally exposing a camera  121   b  or an audio output module  152   b.    
     The cases  101 ,  102 ,  103  may be formed by injection-molding synthetic resin or may be formed of a metal, for example, stainless steel (STS), aluminum (Al), titanium (Ti), or the like. As an alternative to the example in which the plurality of cases form an inner space for accommodating components, the mobile terminal  100  may be configured such that one case forms the inner space. In this example, a mobile terminal  100  having a uni-body is formed so synthetic resin or metal extends from a side surface to a rear surface. 
     If desired, the mobile terminal  100  may include a waterproofing unit for preventing introduction of water into the terminal body. For example, the waterproofing unit may include a waterproofing member which is located between the window  151   a  and the front case  101 , between the front case  101  and the rear case  102 , or between the rear case  102  and the rear cover  103 , to hermetically seal an inner space when those cases are coupled. 
     The mobile terminal  100  may include the display unit  151 , the first audio output module  152   a , the second audio output module  152   b , the proximity sensor  141 , the illumination sensor  142 , the optical output module  154 , the first camera  121   a , the second camera  121   b , the first manipulation unit  123   a , the second manipulation unit  123   b , the microphone  122 , the interface unit  160 , etc. 
     Hereinafter, the mobile terminal  100  will be explained with reference to  FIGS. 1B and 1C . The display unit  151 , the first audio output module  152   a , the proximity sensor  141 , the illumination sensor  142 , the optical output module  154 , the first camera  121   a  and the first manipulation unit  123   a  are arranged on the front surface of the terminal body. The second manipulation unit  123   b , the microphone  122  and the interface unit  160  are arranged on the side surfaces of the terminal body. The second audio output module  152   b  and the second camera  121   b  are arranged on the rear surface of the terminal body. 
     However, alternative arrangements are possible and within the teachings of the instant disclosure. Some components may be omitted or rearranged. For example, the first manipulation unit  123   a  may be located on another surface of the terminal body, and the second audio output module  152   b  may be located on the side surface of the terminal body. 
     The display unit  151  outputs information processed in the mobile terminal  100 . For example, the display unit  151  may display information on an execution screen of an application program driven in the mobile terminal  100 , or a User Interface (UI) or a Graphic User Interface (GUI) associated with such execution screen information. The display unit  151  may be implemented using one or more suitable display devices. Examples of such suitable display devices include a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT-LCD), an organic light emitting diode (OLED), a flexible display, a 3-dimensional (3D) display, an e-ink display, and combinations thereof. 
     The display unit  151  may be implemented using two display devices, which can implement the same or different display technology. For instance, a plurality of the display units  151  may be arranged on one side, either spaced apart from each other, or these devices may be integrated, or these devices may be arranged on different surfaces. The display unit  151  may also include a touch sensor which senses a touch input received at the display unit. When a touch is input to the display unit  151 , the touch sensor may be configured to sense this touch and the controller  180 , for example, may generate a control command or other signal corresponding to the touch. The content which is input in the touching manner may be a text or numerical value, or a menu item which can be indicated or designated in various modes. 
     The touch sensor may be configured in a form of a film having a touch pattern, disposed between the window  151   a  and a display on a rear surface of the window  151   a , or a metal wire which is patterned directly on the rear surface of the window  151   a . Alternatively, the touch sensor may be integrally formed with the display. For example, the touch sensor may be disposed on a substrate of the display or within the display. 
     The display unit  151  can also form a touch screen together with the touch sensor. Here, the touch screen can serve as the user input unit  123  (see  FIG. 1A ). Therefore, the touch screen may replace at least some of the functions of the first manipulation unit  123   a.    
     The first audio output unit  152   a  may be implemented as a receiver for transmitting a call sound to a user&#39;s ears, and the second audio output unit  152   b  may be implemented as a loud speaker for outputting each type of alarm sounds or a play sound of multimedia. It may be configured such that the sounds generated from the first audio output module  152   a  are released along an assembly gap between the structural bodies (e.g., between the window  151   a  and the front case  101 ). In this instance, a hole independently formed to output audio sounds may not be seen or hidden in terms of appearance, thereby further simplifying the appearance of the mobile terminal  100 . 
     The optical output module  154  can output a signal for indicating an event generation using light of a light source. Examples of events generated in the mobile terminal  100  may include message reception, call signal reception, a missed call, an alarm, a schedule notice, an email reception, information reception through an application, and the like. A signal output by the optical output module  154  may be implemented so the mobile terminal emits monochromatic light or light with a plurality of colors. The signal output may be terminated as the mobile terminal senses that a user has checked the generated event, for example. 
     The first camera  121   a  processes image data of still pictures or video acquired by an image capture device in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit  151 , or may be stored in the memory  170 . 
     The first and second manipulation units  123   a  and  123   b  are examples of the user input unit  123 , which may be manipulated by a user to provide input to the mobile terminal  100 . The first and second manipulation units  123   a  and  123   b  may also be commonly referred to as a manipulating portion, and may employ any tactile method that allows the user to perform manipulation such as touch, push, scroll, or the like. The first and second manipulation units  123   a  and  123   b  may be implemented in a user&#39;s non-tactile manner, e.g., by a proximity touch, a hovering touch, etc. 
       FIG. 1B  illustrates the first manipulation unit  123   a  as a touch key, but possible alternatives include a mechanical key, a push key, a touch key, and combinations thereof. Input received at the first and second manipulation units  123   a  and  123   b  may be used in various ways. For example, the first manipulation unit  123   a  may be used by the user to provide an input to a menu, home key, cancel, search, or the like, and the second manipulation unit  123   b  may be used by the user to provide an input to control a volume level being output from the first or second audio output modules  152   a  or  152   b , to switch to a touch recognition mode of the display unit  151 , or the like. 
     As another example of the user input unit  123 , a rear input unit may be located on the rear surface of the terminal body. The rear input unit can be manipulated by a user to provide input to the mobile terminal  100 . The input may be used in a variety of different ways. For example, the rear input unit may be used by the user to provide an input for power on/off, start, end, scroll, control volume level being output from the first or second audio output modules  152   a  or  152   b , switch to a touch recognition mode of the display unit  151 , and the like. The rear input unit may be configured to permit touch input, a push input, or combinations thereof. 
     The rear input unit may be located to overlap the display unit  151  of the front side in a thickness direction of the terminal body. As one example, the rear input unit may be located on an upper end portion of the rear side of the terminal body such that a user can easily manipulate it using a forefinger when the user grabs the terminal body with one hand. Alternatively, the rear input unit can be positioned at most any location of the rear side of the terminal body. 
     Embodiments that include the rear input unit may implement some or all of the functionality of the first manipulation unit  123   a  in the rear input unit. As such, in situations where the first manipulation unit  123   a  is omitted from the front side, the display unit  151  can have a larger screen. As a further alternative, the mobile terminal  100  may include a finger scan sensor which scans a user&#39;s fingerprint. The controller  180  can then use fingerprint information sensed by the finger scan sensor as part of an authentication procedure. The finger scan sensor may also be installed in the display unit  151  or implemented in the user input unit  123 . 
     The microphone  122  is shown located at an end of the mobile terminal  100 , but other locations are possible. If desired, multiple microphones may be implemented, with such an arrangement permitting the receiving of stereo sounds. 
     The interface unit  160  may serve as a path allowing the mobile terminal  100  to interface with external devices. For example, the interface unit  160  may include one or more of a connection terminal for connecting to another device (for example, an earphone, an external speaker, or the like), a port for near field communication (for example, an Infrared Data Association (IrDA) port, a Bluetooth port, a wireless LAN port, and the like), or a power supply terminal for supplying power to the mobile terminal  100 . The interface unit  160  may be implemented in the form of a socket for accommodating an external card, such as Subscriber Identification Module (SIM), User Identity Module (UIM), or a memory card for information storage. 
     The second camera  121   b  is shown located at the rear side of the terminal body and includes an image capturing direction that is substantially opposite to the image capturing direction of the first camera unit  121   a . If desired, second camera  121   a  may alternatively be located at other locations, or made to be moveable, in order to have a different image capturing direction from that which is shown. 
     The second camera  121   b  can include a plurality of lenses arranged along at least one line. The plurality of lenses may also be arranged in a matrix configuration. The cameras may be referred to as an “array camera.” When the second camera  121   b  is implemented as an array camera, images may be captured in various manners using the plurality of lenses and images with better qualities. 
     As shown in  FIG. 1C , a flash  124  is shown adjacent to the second camera  121   b . When an image of a subject is captured with the camera  121   b , the flash  124  may illuminate the subject. As shown in  FIG. 1C , the second audio output module  152   b  can be located on the terminal body. The second audio output module  152   b  may implement stereophonic sound functions in conjunction with the first audio output module  152   a , and may be also used for implementing a speaker phone mode for call communication. 
     At least one antenna for wireless communication may be located on the terminal body. The antenna may be installed in the terminal body or formed by the case. For example, an antenna which configures a part of the broadcast receiving module  111  (See  FIG. 1A ) may be retractable into the terminal body. Alternatively, an antenna may be formed using a film attached to an inner surface of the rear cover  103 , or a case that includes a conductive material. 
     A power supply unit  190  for supplying power to the mobile terminal  100  may include a battery  191 , which is mounted in the terminal body or detachably coupled to an outside of the terminal body. The battery  191  may receive power via a power source cable connected to the interface unit  160 . Also, the battery  191  can be recharged in a wireless manner using a wireless charger. Wireless charging may be implemented by magnetic induction or electromagnetic resonance. 
     The rear cover  103  is shown coupled to the rear case  102  for shielding the battery  191 , to prevent separation of the battery  191 , and to protect the battery  191  from an external impact or from foreign material. When the battery  191  is detachable from the terminal body, the rear case  103  may be detachably coupled to the rear case  102 . 
     An accessory for protecting an appearance or assisting or extending the functions of the mobile terminal  100  can also be provided on the mobile terminal  100 . As one example of an accessory, a cover or pouch for covering or accommodating at least one surface of the mobile terminal  100  may be provided. The cover or pouch may cooperate with the display unit  151  to extend the function of the mobile terminal  100 . Another example of the accessory is a touch pen for assisting or extending a touch input to a touch screen. 
     Referring to  FIG. 1A , a main body of a mobile terminal  100  includes a bezel portion which surrounds an edge of the display unit  151  and forms an edge of the mobile terminal  100 . No image is output on the bezel portion, and various electronic components and circuits are arranged inside the bezel portion. A camera device  200  according to the present disclosure is disposed below the bezel portion. 
     A camera device according to an embodiment of the present disclosure has a structure in which the camera device is reduced in width so as to be disposed in the bezel portion having a predetermined width. As the width of the camera device is reduced, a space around the camera device is minimized to reduce a thickness of the bezel portion. Hereinafter, the camera device  200  having the structure with a reduced width will be described in more detail. 
     In particular,  FIG. 2A  is a view of the camera device viewed from one direction, and  FIG. 2B  is a cross-sectional view of the camera device of  FIG. 2A , taken along line A-A. 
     Referring to  FIGS. 2A and 2B , the camera device  200  according to an embodiment of the present disclosure may include a lens cover  210 , lens assemblies  220 ,  230  and  240 , an image sensor  260 , a masking portion  270 , and an infrared cut filter  280 . However, only some of the lens cover  210 , the lens assemblies  220 ,  230  and  240 , the image sensor  260 , the masking portion  270  and the IR cut filter  280  may be combined to configure the camera device. For example, the camera device may not include the masking portion and the infrared cut filter, if necessary. 
     Referring to  FIG. 2A , the lens cover  210  forms an appearance of the camera device  200  and forms an internal space for accommodating the lens assemblies  220 ,  230 , and  240 . An outer surface of the lens cover  210  includes a pair of planes  213   b  opposing each other on the side surface. The pair of planes  213   b  are formed flat and connected by a pair of curved surfaces  213   c  opposing each other. 
     That is, the outer surface of the lens cover  210  has a cylindrical shape, and a portion of the lens cover  210  is cut. However, the present disclosure is not limited thereto, and the outer surface of the lens cover may have a rectangular shape. A first portion  211 , which will be described later, may protrude from an upper end surface  213   a  of the lens cover  210 . 
     In the lens cover  210 , the lens assemblies  220 ,  230 , and  240  including a plurality of lenses are disposed in an internal space. The lens assemblies  220 ,  230 , and  240  include a plurality of lenses having different diameters and are stacked in one direction in the internal space of the lens cover  210 . In addition, the plurality of lenses may be formed to have different diameters, respectively. An inner circumferential surface of the lens cover  210  is formed to have different diameters so that the plurality of lenses having different diameters may be fitted, respectively. That is, the inner circumferential surface of the lens cover  210  may be stepped. 
     The lens assemblies  220 ,  230 , and  240  including the plurality of lenses may include a first lens unit  220 , a liquid lens unit  230 , and a second lens unit  240 , as described later. The lens cover  210  may be divided into a first portion  211  in which the first lens unit  220  is disposed and a second portion  212  in which the liquid lens unit  230 , the second lens unit  240 , and the image sensor  260  are disposed.  212 . The first portion  211  may protrude from an upper end surface  213   a  of the lens cover  210  and may have a cylindrical shape. Also, a diameter of the first portion  211  may be smaller than a minimum diameter of the second portion  212 . 
     In addition, the first portion  211  and the second portion  212  may be integrally formed. Generally, a lens assembly of the camera device is coupled as a plurality of holders in which a lens is installed are stacked in one direction. In the camera device  200  according to an embodiment of the present disclosure, the lens cover  210  is integrally formed and each lens may be fitted therein. According to such a structure, a process of coupling the lens holders may be omitted, simplifying the process and reducing a possibility of introduction of a foreign material. 
     The lens cover  210  has an opening hole  214  through which light passes toward the front side. Specifically, the opening hole  214  is formed at the center of a front surface of the first portion  211 . Light incident through the opening hole  214  sequentially passes through the lens assemblies  220 ,  230 , and  240  to form an image on the image sensor. 
     Hereinafter, the lens assemblies  220 ,  230 , and  240  and the image sensor  260  will be described. Referring to  FIG. 2B , the lens assemblies  220 ,  230 , and  240  may include a first lens unit  220 , a liquid lens unit  230 , and the second lens unit  240 . The lens assemblies  220 ,  230  and  240  are arranged in order of the first lens unit  220 , the liquid lens unit  230 , and the second lens unit  240  in the internal space of the lens cover  210 . 
     The first lens unit  220  is configured to concentrate light incident from the front side and may include at least one lens, and two or more lenses  221 ,  222 , and  223  may be aligned with respect to a central axis to form an optical system. The second lens unit  240  is configured to form an image on the image sensor using light passing through the liquid lens unit  230 . Also, the second lens unit  240  may include at least one lens, and two or more lenses  241 ,  242 ,  243 , and  244  may be aligned with respect to the central axis to form an optical system. 
     The first lens unit  220  and the second lens unit  240  together with the liquid lens unit  230  to be described later can form an image on the image sensor  260  using light incident from the outside. The image sensor  260  is disposed behind the second lens unit  240  and forms an image using light which has sequentially passed through the first lens unit  220 , the liquid lens unit  230 , and the second lens unit  240 . 
     The image sensor  260  is formed such that horizontal and vertical lengths have a specific ratio. The specific ratio may be 4:3 or 16:9. A length of the image sensor in a first direction d 1  and a length of the image sensor in a second direction d 2  perpendicular to the first direction d 1  are different. For example, the length of the image sensor  260  in the first direction d 1  may be longer than the length of the image sensor  260  in the second direction d 2 . 
     In addition, the entire area of the image sensor  260  overlaps the lens assemblies  220 ,  230 , and  240 . That is, the edge of the image sensor  260  may be smaller than a minimum diameter of the lens assemblies  220 ,  230 , and  240 . Further, since a tilt angle of incident light differs according to distances, the lens assemblies  220 ,  230 , and  240  may adjust a focal length. In the camera device  200  according to the present disclosure, the focal length may be adjusted by the liquid lens unit  230 . 
     Hereinafter, the liquid lens unit  230  will be described in detail. Referring to  FIG. 2B , the liquid lens unit  230  is disposed between the first lens unit  220  and the second lens unit  240 . However, the present disclosure is not limited thereto and any one of the first lens unit  220  and the second lens unit  240  may be omitted and the liquid lens unit  230  may be disposed on the front or rear side of the first lens unit  220  and the second lens unit  240 . In addition, the liquid lens unit  230  may be supported by a support portion protruding from an inner circumferential surface of the lens cover  210  in the circumferential direction. 
       FIG. 3  is a conceptual view illustrating a liquid lens. Hereinafter, a structure of the liquid lens unit  230  will be described in detail with reference to the drawings. The liquid lens unit  230  may include a bottom plate  231  and a top plate  232 . In more detail, the bottom plate  231  and the top plate  232  are spaced apart from each other in a thickness direction of the liquid lens unit to form a space filled with the liquid  235  serving as a lens. 
     In addition, the bottom plate  231  and the top plate  232  may be formed of a transparent member allowing light to be transmitted therethrough. For example, the bottom plate  231  and the top plate  232  may be formed of a glass material. In the present embodiment, when the bottom plate  231  and the top plate  232  are flat plates is exemplified, but the present disclosure is not limited thereto. For example, at least one of the bottom plate  231  and the top plate  232  may be curved in an outer surface or an inner surface thereof or may be a member formed of a flexible material so as to be changed in shape. 
     The liquid lens unit  230  may include a chamber  233 . The chamber  233  is formed on the bottom plate  231 . Also, the chamber  233  has a hollow therein, and the hollow is formed to have a diameter increased upwards. That is, the hollow may be formed to be sloped upwards. 
     Spacers  236  and  237  are disposed above the chamber  233  and include a conductive portion  236  formed of a metal and an insulating portion  237 . The insulating portion  237  is disposed between the conductive portion  236  and the chamber  233 . 
     Further, the top plate  232  is disposed above the spacers  236  and  237 . Thus, an accommodation space in which a liquid  235  is accommodated can be a space confined by the bottom plate  231 , the chamber  233 , the spacers  236  and  237  and the top plate  232  in the liquid lens unit  230 . The liquid  235  may include a conductive liquid  235   b  and a non-conductive liquid  235   a  together. The conductive liquid  235   b  and the non-conductive liquid  235   a  may form a boundary without being mixed with each other. For example, the conductive liquid  235   b  may be water, and the non-conductive liquid  235   a  may be oil. 
     An electrode  234  may be formed on an inner circumferential surface of the chamber  233 . In particular, the electrode  234  is disposed so as to cover the inner circumferential surface of the chamber. The electrode  234  adjusts a surface tension of the conductive liquid  235   b  according to an electrical signal, e.g., a driving voltage, applied to the electrode  234 . 
     As the surface tension of the conductive liquid is changed, an interface between the conductive liquid and the non-conductive liquid is deformed, so that a focal length of the liquid lens unit can be adjusted. According to the focal length control of the liquid lens unit can, the camera device including the liquid lens unit  300  may perform auto-focusing, optical image stabilization, and the like. 
     In addition, the electrical signal, i.e., the driving voltage, is transmitted by a flexible printed circuit board (FPCB)  250  ( FIG. 2B ). According to the present disclosure, the FPCB  250  is formed to overlap the liquid lens unit  230  in the thickness direction. 
     Next,  FIG. 4A  is a plan view illustrating a liquid lens unit in which an FPCB of the present disclosure is disposed, and  FIG. 4B  is a side view of the liquid lens unit in which the FPCB illustrated in  FIG. 4  is disposed. Referring to the drawings, the liquid lens unit  230  includes lens regions S 1  and S 2  and a body region S 3 . The lens regions S 1  and S 2 , corresponding to the liquid portion, through which light passing through the first lens unit  220  is transmitted. The body region S 3  surrounds the lens region and may have a rectangular shape. 
     The lens regions S 1  and S 2  may be circular. The lens regions Si and S 2  are divided into a first region S 1  through which light for forming an image on the image sensor is transmitted and a second region S 2  that does not contribute to image formation of light with respect to the image sensor. The first region S 1  corresponds to the image sensor. That is, the first region S 1  may have a rectangular shape, and the second region S 2  is formed to surround the first region S 1 . 
     According to the present disclosure, since a FPCB  250  is disposed in the second region S 2  that does not contribute to image formation, a lateral thickness of the camera module can be reduced. That is, the FPCB  250  can overlap the liquid lens unit  230  in the thickness direction so as to be disposed in the second region S 2 . 
     Referring to the drawing, the FPCB  250  is stacked (or laminated) on the liquid lens unit  230 . That is, the FPCB  250  can be disposed on the top plate  232  or the bottom plate  231  of the liquid lens unit  230 . In this instance, the FPCB  250  overlaps the body region S 3 . 
     The FPCB  250  can also extend along the edge of the liquid lens unit  230  when the FPCB  250  overlaps the body region S 3 . Accordingly, the FPCB  250  can be formed to surround the first region S 1 . Here, since the FPCB  250  extends to have a predetermined width, the FPCB  250  can be disposed in the second region S 2  that does not contribute to image formation. 
     In other words, the FPCB can be positioned such that a central portion thereof is formed as a through portion to correspond to the first region S 1  to cover the liquid lens part  230 . In this instance, the through portion can be formed larger than the area of the first region S 1 . In addition, the through portion may correspond to at least a portion of each of the body region S 3  and the second region S 2 . 
     The FPCB  250  can apply an electrical signal to the liquid lens unit  230  to control curvature of the liquid lens unit. In addition, the FPCB  250  may include a first FPCB  250   a  for applying a driving voltage and a second FPCB  250   b  for applying a common voltage. 
     In particular, the first FPCB  250   a  can be disposed in an upper portion of the liquid lens unit  230 . Specifically, the first FPCB  250   a  may be stacked on the top plate  232 . In this instance, the first FPCB  250   a  can be adhered to the top plate  232  using an adhesive, or the like. 
     Also, the second FPCB  250   b  is disposed below the liquid lens unit  230 . Like the first FPCB  250   a , the second FPCB  250   b  can be stacked on the bottom plate  231  and adhered using an adhesive, or the like. With this structure, since the FPCB  250  overlaps the liquid lens unit  230  in the thickness direction, the width of the lens assembly can be reduced. Accordingly, a lateral thickness of the camera device  200  can be reduced, reducing the total volume of the camera device  200 . 
     Next,  FIGS. 5A and 5B  are conceptual views illustrating an example of a liquid lens unit in which the FPCB illustrated in  FIG. 4  is positioned. Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings. 
     The FPCB  250  can be electrically connected to a controller to transmit an electrical signal of the controller to the liquid lens unit  230 . The FPCB  250  can also have an extending portion  253  extending from a portion thereto so as to be connected to the controller. That is, the FPCB  250  may include stacked portions  251  and  252  stacked on the liquid lens unit  230  and the extending portion  253  extending from the stacked portions  251  and  252 . The extending portion  253  may extend in the first direction d 1 . 
     Referring to the drawings, the FPCB  250  includes a node portion  255  and a conductive pattern  254 . The node portion  255  adjusts the curvature of the liquid lens unit  230  by applying a voltage to the electrode  234 . The node portion  255  may include a plurality of nodes  255   a ,  255   b ,  255   c , and  255   d  formed at corners of the upper or lower surface of the liquid lens unit  230 , respectively. Each of the plurality of nodes  255   a ,  255   b ,  255   c , and  255   d  can be electrically connected to the conductive pattern  254  to receive an electrical signal. 
     For the embodiment illustrated in  FIG. 5A , the plurality of nodes  255   a ,  255   b ,  255   c , and  255   d  are connected by the single conductive pattern  254 . In addition, the conductive pattern  254  can be branched from any one point and extend along the extending portion  253  so as to be connected to the controller. In this instance, the same electrical signal can be applied to each of the plurality of nodes  255   a ,  255   b ,  255   c , and  255   d , and thus, the camera device  200  can perform the auto-focusing function. 
     In contrast, for the embodiment illustrated in  FIG. 5B , a plurality of nodes  355   a ,  355   b ,  355   c , and  355   d  are electrically connected to a plurality of conductive patterns  354   a ,  354   b ,  354   c , and  354   d , respectively. In this embodiment, the plurality of conductive patterns  354   a ,  354   b ,  354   c  and  354   d  are formed on an FPCB  350 , and here, the plurality of conductive patterns  354   a ,  354   b ,  354   c  and  354   d  are spaced apart from each other at predetermined intervals to prevent a short circuit. 
     In this instance, the width of the FPCB is increased. However, if the width of the FPCB is simply increased, the first region may be invaded or light may be scattered to increase a flare phenomenon. In order to solve the above-mentioned problem and to form the plurality of conductive patterns  354   a ,  354   b ,  354   c , and  354   d , the FPCB  350  can include an extending portion  356 . 
     The extending portion  356  extends from the corners of stacked portions  351  and  352  toward a central portion so that overlapping portion of the stacked portions  351  and  352  and the body region S 3  is increased. Thus, the width of the corner portion of the FPCB  350  may be increased. In addition, the extending portion  353  cab extend in the second direction d 2  and the width thereof can be increased. 
     The plurality of conductive patterns  354   a ,  354   b ,  354   c , and  354   d  can extend in the first direction d 1  toward the extending portion  353 . The first and fourth conductive patterns  354   a  and  354   d  are disposed to be lopsided to the first and fourth nodes  355   a  and  355   d  from the extending portion  353  and the second and third conductive patterns  354   b  and  354   c  can be disposed to be lopsided to the second and third nodes  355   b  and  355   c  from the extending portion  353 . 
     In this instance, the first and second conductive patterns  354   a  and  354   b  may extend through the first and second extending portions  356   a  and  356   b , respectively. With this structure, the first to fourth nodes  355   a ,  355   b ,  355   c , and  355   d  can be respectively controlled. Accordingly, the camera device  200  can perform optical image stabilization, as well as the auto-focusing function, while the width of the FPCB  350  is prevented from being increased. 
     Next,  FIGS. 6A, 6B, and 6C  are conceptual views illustrating another example of a liquid lens unit in which the FPCB illustrated in  FIG. 4A  is disposed. The same or similar reference numerals are given to the components which are the same or similar to those of the above-described embodiment, and a redundant description thereof will be omitted. 
     Unlike the aforementioned embodiments, in this embodiment, the node portion  455  may include eight nodes  455   a ′,  455   a ″,  455   b ′,  455   b ″,  455   c ′,  455   c ″,  455   d ′, and  455   d ″. Referring to  FIG. 6A , the nodes  455   a ′,  455   a ″,  455   b ′,  455   b ″,  455   c ′,  455   c ″,  455   d ′, and  455   d ″ may be arranged in pairs at the corners of a flexible circuit board  450 , respectively. Also, as in the embodiment disclosed in  FIG. 5A , the nodes  455   a ′,  455   a ″,  455   b ′,  455   b ″,  455   c ′,  455   c ″,  455   d ′, and  455   d ″ may be electrically connected by one conductive pattern  454 . With this structure, it is possible to control the liquid lens unit  430  more minutely. 
     Referring to  FIG. 6B , the extending portion  553  can be formed in plurality. More specifically, the extending portion  553  includes first and second extending portions  553   a  and  553   b  extending in parallel in the first direction d 1 . In this instance, the first and second extending portions  553   a  and  553   b  can be lopsided to one side and the other side so as to be spaced apart from each other. 
     Referring to  FIG. 6C , a plurality of extending portions  653  may extend in directions opposite to each other. The extending portions  653  include first to fourth extending portions  653   a ,  653   b ,  653   c , and  653   d . The first and second extensions  653   a  and  653   b  can extend from any one side of the liquid lens unit in one direction, and the third and fourth extensions  653   c  and  653   d  can extend from the other side of the liquid lens unit in a direction opposite to the one direction. The first and second extending portions  653   a  and  653   b  and the third and fourth extending portions  653   c  and  653   d  are also spaced apart from each other. 
     Next,  FIG. 7  is a conceptual view illustrating a modification of the liquid lens unit in which the FPCB illustrated in  FIG. 4A  is disposed. In this embodiment, unlike the above-described embodiments, an extending portion  753  extends in the second direction d 2  perpendicular to the first direction d 1 . Since the length of the image sensor in the first direction d 1  is longer than the length of the image sensor in the second direction d 2 , the stacked portion  752  extending in the first direction d 1  of an FPCB  750  can be formed to have a width larger than that of the stacked portion  751  extending in the second direction d 2 . 
     Accordingly, conductive patterns  754   a ,  754   b ,  754   c , and  754   d  can be formed so as to converge toward the extending portion  753  formed at the center. When the extending portion  753  of the FPCB is assembled to a lens cover, the FPCB is bent downwards inside of the lens cover. In this instance, due to the thickness of the FPCB, the lateral thickness of the camera device is increased. 
     Next,  FIGS. 8A and 8B  are conceptual views illustrating another modification of the liquid lens unit in which the FPCB illustrated in  FIG. 4A  is disposed. In this embodiment, the liquid lens unit  830  includes recess portions  838  in which extending portions  853   a  and  853   b  are disposed. The recess portions  838  can be formed to be recessed from any one side of the liquid lens unit  830 . In addition, the recess portions  838  extend in a vertical direction. Extending portions  853   a  and  853   b  are bent and disposed in the recess portions  838 . The extending portions  853   a  and  853   b  can also be connected to an electronic circuit disposed at a lower end of the camera device. 
     The recessed portions  838   a  and  838   b  can be formed as a pair and formed to be lopsided to one side and the other side on the side surface of the liquid lens unit  830  to correspond to the extending portions  853   a  and  853   b . The widths of the recessed portions  838   a  and  838   b  may be larger than the widths of the extending portions  853   a  and  853   b . In addition, grooves corresponding to the recess portions  838   a  and  838   b  may be formed on both sides of the extending portions  853   a  and  853   b , respectively. With this structure, it is possible to suppress an increase in the lateral thickness of the camera device which is increased due to the thickness of the FPCB. 
     Referring back to  FIG. 2B , the camera device  200  according to an embodiment of the present disclosure may include a masking portion  270  to prevent a flare shape. The camera device  200  is configured such that light incident therein is refracted by the lens assemblies  220 ,  230 , and  240  to form an image on the image sensor. However, a phenomenon in which at least a portion of incident light is scattered by the internal structure and scattered light is incident to the image sensor occurs. This phenomenon is known as a flare phenomenon, and in order to reduce such a flare phenomenon, the camera device  100  according to the present disclosure includes the masking portion  270 . 
     The masking portion  270  is formed of black and can absorb scattered light. Referring to the drawing, the masking portion  270  is formed on the FPCB  250  arranged to surround the first region S 1 . Further, the masking portion  270  may be a tape of black color and adhered to the FPCB  250 . The masking portion  270  can also be stacked on each of the first and second FPCBs  250   a  and  250   b.    
     In addition, the FPCB  250  can be formed in a black color to form the masking portion  270 . That is, the FPCB  250  can be formed integrally with the masking portion  270 . With this structure, it is possible to reduce the phenomenon in which light scattered by the internal structure of the camera device deviates from an intended refraction path and is incident to the image sensor. 
     However, light passing through the liquid lens unit  230  may pass through the second lens unit  240  so as to be scattered again. A masking region can be formed in the ultraviolet cut filter  280  according to the present disclosure. 
     Next,  FIG. 9  is a view illustrating an infrared cut filter according to the present disclosure. Referring back to  FIG. 2A , the camera device  200  according to an embodiment of the present disclosure further includes an infrared cut filter  280 . The infrared cut filter  280  may be disposed between the second lens unit  240  and the image sensor  260 . 
     The infrared cut filter  280  has a flat plate shape and may include a transmissive region  281  formed to correspond to the image sensor and a masking region  282  formed to surround the transmissive region  281 . The masking region  282  may be formed in a black color like the masking portion  270  described above. The flare phenomenon caused due to light scattered in the camera device can be reduced by the masking region  282  of the infrared cut filter  280  disposed in the second lens unit  240  and the image sensor  260 . 
     The present invention described above may be implemented as a computer-readable code in a medium in which a program is recorded. The computer-readable medium includes any type of recording device in which data that may be read by a computer system is stored. The computer-readable medium may be, for example, a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like. The computer-readable medium also includes implementations in the form of carrier waves (e.g., transmission via the Internet). Also, the computer may include the controller  180  of the terminal. Thus, the foregoing detailed description should not be interpreted limitedly in every aspect and should be considered to be illustrative. The scope of the present invention should be determined by reasonable interpretations of the attached claims and every modification within the equivalent range are included in the scope of the present invention. 
     The foregoing embodiments and advantages are merely exemplary and are not to be considered as limiting the present disclosure. The present teachings may be readily applied to other types of apparatuses. This description is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the embodiments described herein may be combined in various ways to obtain additional and/or alternative embodiments. 
     As the present features may be embodied in several forms without departing from the characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be considered broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.