Mobile terminal and electronic apparatus including mobile terminal

In a control method for an electronic apparatus according to the present invention, in which a mobile terminal comprises a camera comprising a plurality of lenses and a first display unit combined to a case, the case comprising a first body where the mobile terminal is accommodated and a second body where a second display unit is arranged, the control method for an electronic apparatus comprises the steps of: displaying first screen information on the second display unit and displaying a preview screen on the first display unit in response to driving of the camera; detecting a pre-set touch input received by the first display unit; executing an expanded preview mode in response to the pre-set touch input, generating a control signal for displaying, on the second display unit, second screen information corresponding to a camera function related to the preview screen of the first display unit, and transmitting the control signal to the second display unit; and while the preview screen of the first display unit is displayed, changing the first screen information of the second display unit to the second screen information in response to the control signal.

FIELD

The present disclosure relates to a mobile terminal, an electronic device having a case coupled to the mobile terminal, and a method for controlling the same.

BACKGROUND

Terminals may be divided into mobile/portable terminals and stationary terminals according to mobility. Also, the mobile terminals may be classified into handheld types and vehicle mount types according to whether or not a user can directly carry.

Mobile terminals have become increasingly more functional. Examples of such functions include data and voice communications, capturing images and video via a camera, recording audio, playing music files via a speaker system, and displaying images and video on a display. Some electronic devices include additional functionality which supports electronic game playing, while other terminals are configured as multimedia players. Specifically, in recent time, mobile terminals can receive broadcast and multicast signals to allow viewing of video or television programs

As it becomes multifunctional, a mobile terminal can be allowed to capture still images or moving images, play music or video files, play games, receive broadcast and the like, so as to be implemented as an integrated multimedia player.

Meanwhile, in recent years, there is a trend to further expand the usability of a mobile terminal by interoperating with an external device, so as to more efficiently utilize such various functions. In this case, the mobile terminal and the external device interoperating with the mobile terminal may preferably operate independently or interoperably as needed to improve user convenience and usability.

DISCLOSURE

Technical Problem

One aspect of the present disclosure is to provide a mobile terminal capable of expanding a display area by coupling a case having an additional display unit interoperating with the mobile terminal to the mobile terminal, and an electronic apparatus (or electronic device) having the case to which the mobile terminal is coupled.

Another aspect of the present disclosure is to provide a mobile terminal capable of improving usability of various camera functions by more efficiently utilizing such various camera functions using an expanded display area when a camera of the mobile terminal is driven, and an electronic device having a case to which the mobile terminal is coupled.

Still another aspect of the present disclosure is to provide a mobile terminal capable of performing capturing while checking application results of various camera functions in advance by using an expanded display area when a camera of the mobile terminal is driven, and an electronic device having a case to which the mobile terminal is coupled.

Technical Solution

In order to achieve these and other advantages and in accordance with the purpose of this specification, as embodied and broadly described herein, there is provided an electronic apparatus that may include a mobile terminal and a case to which the mobile terminal is coupled. The mobile terminal may include a terminal body coupled to the case, a camera provided on the terminal body and having a plurality of lenses, and a first display unit coupled to the case, and the case may include a first body to accommodate at least a portion of the terminal body, a second body provided with a second display unit, a wiring part electrically connecting the first body and the second body, such that data received from the mobile terminal is transmitted to the second display unit, and a wireless communication unit connected to the wiring part to transmit/receive signals to/from the mobile terminal. A control unit of the mobile terminal, in a state where first screen information is displayed on the second display unit and a preview screen is displayed on the first display unit, may detect a preset touch input received by the first display unit, execute an expanded preview mode according to the preset touch input, generate a control signal for displaying second screen information corresponding to a camera function related to the preview screen on the second display unit so as to transmit the control signal to the second display unit through the wiring part and the wireless communication unit, and switch the first screen information of the second display unit to the second screen information according to the control signal while the preview screen is displayed on the first display unit.

In one implementation, the preview screen of the first display unit may display an icon for selectively applying a plurality of angles of view corresponding to the plurality of lenses to the preview screen. The expanded preview mode may be executed when the preset touch input is applied to the icon. The second display unit may display a plurality of sub preview screens corresponding to the plurality of angles of view as the second screen information.

In one implementation, when a touch signal of a touch input applied to any one of the plurality of sub preview screens displayed on the second display unit is received, the control unit of the mobile terminal may apply an angle of view corresponding to a sub preview screen, to which the touch input has been applied, to a preview screen to be captured, and transmit a control signal for displaying a graphic object indicating the applied angle of view on the one sub preview screen to the second display unit.

In one implementation, an angle of view of a preview screen to be captured may be changed to an angle of view corresponding to a touch input when the touch input for changing the angle of view of the preview screen is applied to the first display unit while the second screen information is displayed, and a control signal for displaying a graphic object indicating the changed angle of view on one of the plurality of sub preview screens may be transmitted to the second display unit.

In one implementation, third screen information, in which one of the sub preview screens included in the second screen information is expanded to the entire second display unit, may be displayed on the second display unit when a touch input is applied to a predetermined area of the second screen information. The one sub preview screen may correspond to an angle of view currently applied to the preview screen of the first display unit, and a capturing icon for capturing the one sub preview screen may be displayed on the third screen information.

In one implementation, when the touch input is applied to the predetermined area of the second screen information, the control unit of the mobile terminal may pop up guide information on the preview screen of the first display unit. Here, the guide information may inform that capturing is allowed to be carried out on the second display unit using the third screen information.

In one implementation, the control unit of the mobile terminal may control the second display unit to change the sub preview screen displayed on the third screen information to a second sub preview screen corresponding to a changed angle of view, in response to a change in the angle of view to be applied to the preview screen based on a touch input applied to the first display unit.

In one implementation, the control unit of the mobile terminal may terminate the expanded preview mode based on a touch input applied to the second screen information, and control the second display unit to display the first screen information while maintaining the preview screen of the first display unit.

In one implementation, in response to a touch input being applied to an icon for executing a reflector capturing function on the first display unit while the second screen information is displayed, a reflector capturing mode may be executed by activating a camera flash of the mobile terminal, and the second display unit may display an image of a reflector to be applied to the preview screen as the second screen information.

In one implementation, the second screen information may output thereon a control bar for adjusting white balance (WB) to be applied to the preview screen of the first display unit in the reflector capturing mode, and the image of the reflector corresponding to the white balance adjusted according to a drag touch input applied to the control bar may change differently.

In one implementation, the plurality of sub preview screens of the second display unit may be displayed by applying an adjusted magnification after a predetermined time elapses, when the magnification of the preview screen is adjusted according to a preset touch gesture applied to the first display unit while the second screen information is displayed.

In one implementation, when the preset touch input is applied to the first display unit, a gallery application may be executed on the second display unit and a first image captured and stored before the preview screen is displayed may be displayed as the second screen information. The first image of the second display unit may be changed to a newly captured and stored second image when the preview screen displayed on the first display unit is captured.

In order to achieve these and other advantages and in accordance with the purpose of this specification, as embodied and broadly described herein, there is provided a method for controlling an electronic apparatus including a mobile terminal and a case to which the mobile terminal is coupled. Here, the mobile terminal may include a camera having a plurality of lenses, and a first display unit coupled to the case, and the case may include a first body to accommodate the mobile terminal and a second body having a second display unit. The method may include displaying first screen information on the second display unit and displaying a preview screen on the first display unit according to an operation of the camera, detecting a preset touch input received by the first display unit, executing an expanded preview mode according to the preset touch input and generating a control signal for displaying second screen information corresponding to a camera function related to the preview screen on the second display unit so as to transmit the control signal to the second display unit, and switching the first screen information of the second display unit to the second screen information according to the control signal while the preview screen is displayed on the first display unit.

Advantageous Effects

As described above, in a mobile terminal and an electronic device having the mobile terminal according to the present disclosure, various camera functions related to a preview screen can be used more efficiently by using an expanded display area.

In the present disclosure, a plurality of sub preview screens, to which a plurality of angles of view are applied, can be previewed on a large screen through a second display unit while maintaining a size of a preview image of a camera displayed on a first display unit.

Capturing a subject can be carried out by selecting an appropriate angle of view while viewing images, to which different angles of view have been actually applied, through the second display unit, thereby simultaneously improving user convenience and usability.

A reflector function can be provided on a preview screen displayed on the first display unit by using the second display unit, such that contrast of an image can be mitigated, a brighter image can be obtained, and soft light can be applied to a subject even when capturing against light.

MODES FOR CARRYING OUT THE PREFERRED IMPLEMENTATIONS

Description will now be given in detail according to exemplary implementations 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. In describing the present disclosure, if a detailed explanation for a related known function or construction is considered to unnecessarily divert the gist of the present disclosure, such explanation has been omitted but would be understood by those skilled in the art.

It will be understood that when an element is referred to as being “connected with” another element, the element can be connected with the another element or intervening elements may also be present. In contrast, when an element is referred to as being “directly connected with” another element, there are no intervening elements present.

FIGS.1A and1Bare conceptual views illustrating an electronic device according to the present disclosure.

Referring to the drawings, a mobile terminal100may be coupled to a case200. The mobile terminal100and the case200may be coupled to configure one electronic device (or electronic apparatus)300.

In this case, the mobile terminal may be one of a cellular phone, a smart phone, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigator, a slate PC, a tablet PC, a ultra book, and a wearable device (for example, a smart watch, smart glass, a head mounted display (HMD), and the like). Details of the mobile terminal will be described later with reference toFIGS.3A to3C.

The case200may be a pouch that protects an outer appearance of the mobile terminal100or is provided as an accessory of the mobile terminal100to cover or accommodate at least one surface of the mobile terminal100. The case200may be coupled to the mobile terminal to extend the function of the mobile terminal100.

Meanwhile, in the present disclosure, information output from the mobile terminal may be processed in connection with the structure or function of the case200. As an example of this, referring toFIG.1A, the case200may include a display (or display unit) (hereinafter, referred to as “second display unit250”) interoperating with a display (hereinafter, referred to as “first display unit151”) of the mobile terminal100.

The case200may include first and second bodies210and220connected to be rotatable relative to each other. The second display unit250may be disposed on one of the first and second bodies210and220.

For example, the first body210may accommodate at least a portion of the mobile terminal body. A rear side of the mobile terminal may be accommodated in the first body210, and accordingly the first display unit151disposed on a front side of the mobile terminal may be externally exposed.

In this case, the mobile terminal100may be detachably coupled to the first body210. In addition, the mobile terminal may be configured to detect whether it is coupled to the first body210. For the detection, the first body210may include a magnet245(seeFIG.4) on one surface facing the mobile terminal100. The mobile terminal100may include a hall sensor143(seeFIG.4) disposed on its rear side to sense a magnetic field corresponding to the magnet245when the body of the mobile terminal is coupled to the first body210. When the magnetic field is sensed by the hall sensor, the mobile terminal may recognize that it has been coupled to the case and perform a preset control.

For example, when the magnetic field is sensed by the hall sensor143, a control unit180of the mobile terminal100may control a power supply unit190to supply an operating current to the second display unit250disposed on the second body220.

That is, the second display unit250provided on the second body220may be operated by power supplied from the mobile terminal100.

On the other hand, the second display unit250may be disposed on the second body220to perform a function of expanding a display area of the first display unit151or to operate independent of the first display unit151. For example, contents related to information output on the first display unit151may be mirrored to be output on the second display unit250.

In addition, execution screens of different applications may be output to the first and second display units151and250. As another example, the first and second display units151and250may output an execution screen of one application to divided areas.

Meanwhile, the first and second display units151and250may be externally exposed together in an open state, and the open state may be defined with reference toFIG.1B.

In addition, the mobile terminal100may be configured to control screen information output to the second display unit250, and for this purpose, at least one of wired and wireless communication links may be established between the mobile terminal100and the second display unit250.

In addition, the mobile terminal100may be configured to supply an operating current to the second display unit250. The operating current may be supplied from the mobile terminal100to the second display unit250through a wire provided in the case200.

Referring toFIG.1B, the first and second bodies210and220of the case200may rotate relative to each other between a closed state and a fully opened state.

The closed state may be a state shown in (a) ofFIG.1B, in which the first body210of the case200covers the first display unit151of the mobile terminal100and the first display unit151is obscured by the first body210. That is, the state in which the first display unit151is covered by the second display unit250may be the closed state. In the closed state, the mobile terminal100and the case200may overlap each other in the form like a diary in a thickness direction of the mobile terminal, which may enhance user's portability.

Also, in this case, front surfaces of the first and second display units151and250may face each other. The front surfaces may be outer surfaces which display visual information and receive touch inputs.

The closed state may be switched to the open state as the second body220is rotated with respect to the first body210. The open state may be a state in which the first display unit151is not obscured by the second display unit250, and thus a state in which an angle formed between the first and second display units151and250is a specific angle other than 0 degree may be referred to as the open state.

(b) ofFIG.1Billustrates an open state in which the first and second display units151and250form 180 degrees with each other. The foregoing example ofFIG.1Aillustrates the state in which the first and second display units151and250form 180 degrees with each other. In addition, in the open state, the first and second bodies210and220may be fixed at a specific angle, and for this purpose, a fixing member may be provided in the case220.

As illustrated in (b) ofFIG.1B, the first and second bodies210and220may further rotate relative to each other in a direction A. Accordingly, as illustrated in (c) ofFIG.1B, the first and second bodies210and220can relatively rotate up to 360 degrees. This open state may be defined as a ‘fully open state’.

In addition, when the first and second bodies210and220relatively rotate within a range that is greater than 180 degrees and less than 360 degrees, this open state may be defined as a “bent state”. The “bent state” in which the first body210is bent toward the rear side of the case may be detected through a connecting portion for connecting the first and second bodies210and220or a sensor separately provided in the connecting portion.

In this case, the first and second bodies210and220are superimposed on each other, and the first and second display units151and250may face outward, respectively. That is, the first and second display units151and250may face opposite directions.

Meanwhile, the mobile terminal may be configured to detect the closed state and the open state. In a related example, the mobile terminal may include a light sensor for sensing ambient illuminance, and the control unit180of the mobile terminal100may detect one of the closed state and the open state according to the illuminance sensed by the light sensor.

The control unit180may also separately detect a fully open state from among the open states.

The electronic device300of the present disclosure may perform an operation of controlling the first and second display units151and250in cooperation with the open state and the closed state. For example, in the closed state, the first and second display units151and250may be driven in an inactive state, When the closed state is switched to the open state, at least one of the first and second display units151and250may be activated.

As an example, when the closed state is switched to the open state, both the first display unit151and the second display unit250may be switched to an active state. In this case, different home screen pages may be respectively output to the first and second display units151and250, or the same home screen page may be displayed all over the first and second display units151and250. In addition, various information may be output to the first and second display units151and250according to circumstances.

As another example, when the closed state is switched to the open state, the first display unit151may be switched to an active state and the second display unit250may be maintained in an inactive state.

The second display unit250may include a touch sensor for sensing a touch applied to the second display unit250.

The second display unit250may be configured to sense a touch even in the inactive state.

In relation to touch sensing of the touch sensor, the second display unit250may be switched to the active state in the open state when a touch applied to the second display unit250corresponds to a preset type of touch (preset touch).

Meanwhile, when a touch is applied to the second display unit250, the second display unit250may transmit a touch signal corresponding to the touch to the mobile terminal100. In addition, when the touch according to the received touch signal corresponds to a preset touch, the mobile terminal100may transmit a signal corresponding to a control command for activating the second display unit250to the second display unit250.

Then, the second display unit250may be activated based on the signal received from the mobile terminal100.

Meanwhile, in order to implement the operation of the electronic device described above, the case may have a new structure. Hereinafter, such a structure of the case will be described in more detail.

FIGS.2A,2B, and2Care conceptual views illustrating a main structure of an electronic device in accordance with the present disclosure.

The first body210of the case200may have an accommodation space211in which a rear surface of the body of the mobile terminal is accommodated. The first body may accommodate at least a portion of the mobile terminal in the accommodation space211, and the rear surface of the mobile terminal may be disposed on a bottom surface of the accommodation space211. However, the present disclosure is not necessarily limited thereto, and for example, the first body may be formed in a plate shape coupled to the rear surface of the mobile terminal, or may be configured to be coupled to a side surface of the mobile terminal.

The second body220on which the second display unit250is disposed may be rotatably coupled to the first body by a connecting portion230. More specifically, the connecting portion230may be disposed between the first and second bodies210and220such that the first and second bodies210and220can rotate relative to each other.

Referring to the drawings, the second body220may include a first cover221, a second cover222, and a second display unit250. An accommodating groove221ain which at least a part of the connecting portion230is accommodated may be formed in the first cover221. The second cover222may be coupled to the first cover221and may be a frame to which various electronic components are mounted. As an example, a second circuit board to be described later may be mounted on the second cover222.

The second cover222may be rotatably coupled to the connecting portion230. The second cover222may include a groove222aat a position corresponding to the accommodating groove221aof the first cover221, and the connecting portion230may be disposed in the groove222a. In this case, the second display unit250may be mounted to the second cover222.

The connecting portion230may include first and second hinges231and232spaced apart from each other along a side surface of the first body210. The first and second hinges231and232each may include a hinge body233and a hinge shaft234.

A hinge groove (not shown) may be formed in the hinge body233. The hinge shaft234may be inserted into the hinge groove so that the first and second bodies210and220can rotate relative to each other. The hinge shaft234may be provided in plurality, each of which may include a coupling portion235disposed on one side thereof to be coupled to the first and second bodies210and220.

In this case, the case200may include a wireless communication unit283and a wiring part242, through which the mobile terminal100can control the second display unit250.

The wireless communication unit283may be disposed in the first body210to perform short-range wireless communication with the mobile terminal. The mobile terminal100may include a wireless communication unit (hereinafter, referred to as a “first wireless communication unit”) that performs short-range wireless communication with a wireless communication unit (hereinafter referred to as a “second wireless communication unit”) of the case200.

The first wireless communication unit116(seeFIG.3C) may transmit a radio signal (wireless signal) to the rear of the mobile terminal100, and the second wireless communication unit283may be disposed in the first body210to face the first wireless communication unit116so as to receive the radio signal. The first wireless communication unit116and the second wireless communication unit283each may include, for example, a Keyssa chip for wireless data transmission and reception, and the Keyssa chips may be disposed at positions with being spaced apart from each other by a distance of several cm or less along a thickness direction of the mobile terminal. Accordingly, the first wireless communication unit116and the second wireless communication unit283may perform communication through a short-range communication method having a transmission distance of about several cm.

As illustrated, the first body210may include a first circuit board243on which the second wireless communication unit283is disposed, and the second body210may include a second circuit board244that is disposed beneath the second display unit250and electrically connected to the first circuit board243through the wiring part242. The second circuit board244may be connected to the second display unit250and perform a function of transferring a control signal received from the mobile terminal100to the second display unit250.

That is, the second circuit board244may transfer the data transmitted and received between the first wireless communication unit116and the second wireless communication unit283to the second display unit250.

The wiring part242may be a portion by which the first and second bodies210and220are electrically connected through the connecting portion230. The radio signal (or data) received through the short-range wireless communication with the mobile terminal100may be transferred to the second display unit250through the wiring part242. For this connection, a connection passage through which the wiring part242passes may be defined in the connecting portion230.

As an example, an accommodation space for accommodating at least a portion of the wiring part242may be defined in any one of the first and second hinges231and232. More specifically, the first hinge231may be closer to an upper side of the mobile terminal than the second hinge232, and the second hinge232may be closer to a lower side of the mobile terminal100than the first hinge231. The second circuit board244may be disposed adjacent to a lower end of the case200, and thus the first wireless communication unit116and the second wireless communication unit283may be respectively connected to the lower side of the case200or the mobile terminal100.

In this structure, the accommodation space may be defined in the second hinge232. The second hinge232may include an extension portion236extending from the hinge body233. The extension portion236may include a cable246extending to the first body210and the second body220. The accommodation space may be defined in the extension portion236and the cable246may be accommodated in the accommodation space. First and second flexible circuit boards247and248may be disposed at both ends of the cable246, respectively, and the first and second flexible circuit boards247and248may be electrically connected to the first and second circuit boards243and244. With this structure, a signal for controlling the second display unit250may be wirelessly transmitted from the mobile terminal to the first body210and transmitted to the second body220through a wire.

Meanwhile, referring to the drawings, the first circuit board243may include a power terminal (e.g., pogo-pin,249) that is brought into contact with a power supply terminal (not shown) of the mobile terminal to receive power from the mobile terminal. The power terminal249may be electrically connected to the wiring part242to supply power to the second display unit250. With this structure, power supplied to the second display unit250may be transmitted from the mobile terminal through a wired path.

According to the structure described above, the electronic device can perform an operation of controlling the first and second display units151and250in an interoperating manner by using short-range wireless communication and a wired power supply path. Hereinafter, structure and functions of the mobile terminal will be described in detail, and then the control operation will be described.

FIGS.3A,3B, and3Care conceptual views illustrating one example of a mobile terminal in accordance with the present disclosure. The mobile terminal100according to the present disclosure may be coupled to the case of the electronic device described above.

Referring toFIGS.3A to3C,FIG.3Ais a block diagram of a mobile terminal in accordance with one exemplary implementation of the present disclosure, andFIGS.3B and3Care conceptual views illustrating one example of a mobile terminal, viewed from different directions.

In more detail, the wireless communication unit110may typically include one or more modules which permit communications such as wireless communications between the mobile terminal100and a wireless communication system, communications between the mobile terminal100and another mobile terminal, or communications between the mobile terminal100and an external server. Further, the wireless communication unit110may typically include one or more modules which connect the mobile terminal100to one or more networks.

The wireless communication unit110may include one or more of a broadcast receiving module111, a mobile communication module112, a wireless Internet module113, a short-range communication module114, and a location information module115.

The input unit120may include a camera121or an image input unit for obtaining images or video, a microphone122, which is one type of audio input device for inputting an audio signal, and a user input unit123(for example, a touch key, a mechanical key, and the like) for allowing a user to input information. Data (for example, audio, video, image, and the like) may be obtained by the input unit120and may be analyzed and processed according to user commands.

The output unit150may typically be configured to output various types of information, such as audio, video, tactile output, and the like. The output unit150may be shown having at least one of a display151, an audio output module152, a haptic module153, and an optical output module154. The display151may have an inter-layered structure or an integrated structure with a touch sensor in order to implement a touch screen. The touch screen may function as the user input unit123which provides an input interface between the mobile terminal100and the user and simultaneously provide an output interface between the mobile terminal100and a user.

Also, the control unit180may control at least some of the components illustrated inFIG.3A, to execute application programs that have been stored in the memory170. In addition, the control unit180may control at least two of those components included in the mobile terminal100to activate the application program.

At least part of the components may cooperatively operate to implement an operation, a control or a control method of a mobile terminal according to various implementations disclosed herein. Also, the operation, the control or the control method of the mobile terminal may be implemented on the mobile terminal by an activation of at least one application program stored in the memory170.

Hereinafter, description will be given in more detail of the aforementioned components with reference toFIG.1A, prior to describing various implementations implemented through the mobile terminal100.

First, regarding the wireless communication unit110, the broadcast receiving module111is 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 implementations, two or more broadcast receiving modules may be utilized to facilitate simultaneous reception of two or more broadcast channels, or to support switching among broadcast channels.

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 module113refers to a module for wireless Internet access. This module may be internally or externally coupled to the mobile terminal100. The wireless Internet module113may 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), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), LTE-advanced (LTE-A) and the like. The wireless Internet module113may transmit/receive data according to one or more of such wireless Internet technologies, and other Internet technologies as well.

The input unit120is for inputting image or video information (or signal), audio information (or signal), data, or user input. The mobile terminal100may include one or a plurality of cameras121through which such image information can be obtained. Such cameras121may 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 display151or stored in memory170. Meanwhile, the cameras121may be arranged in a matrix configuration to permit a plurality of images having various angles or focal points to be input to the mobile terminal100. Also, the cameras121may be located in a stereoscopic arrangement to acquire left and right images for implementing a stereoscopic image.

The microphone122processes an external audio signal into electric audio (sound) data. The processed audio data can be processed in various manners according to a function being executed in the mobile terminal100. If desired, the microphone122may include assorted noise removing algorithms to remove unwanted noise generated in the course of receiving the external audio signal.

The sensing unit140is 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, and generate a corresponding sensing signal. The control unit180generally cooperates with the sending unit140to control operations of the mobile terminal100or execute data processing, a function or an operation associated with an application program installed in the mobile terminal based on the sensing signal. The sensing unit140may be implemented using any of a variety of sensors, some of which will now be described in more detail.

The proximity sensor141refers to 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 sensor141may be arranged at an inner area of the mobile terminal covered by the touch screen, or near the touch screen.

When the touch screen is implemented as a capacitance type, the proximity sensor141can 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. When the touch screen is implemented as a capacitance type, the proximity sensor141can 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 case, the touch screen (touch sensor) may also be categorized as a proximity sensor.

A touch sensor senses a touch (or a touch input) applied to the touch screen (or the display unit151) 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.

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 control unit180. Accordingly, the control unit180may sense which area of the display151has been touched. Here, the touch controller may be a component separate from the control unit180, the control unit180, and combinations thereof.

The touch sensor and the proximity sensor may be implemented individually, or in combination, to sense various types of touches. Such touches include 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.

The camera121, which has been depicted as a component of the input unit120, typically includes at least one a camera sensor (CCD, CMOS etc.), a photo sensor (or image sensors), and a laser sensor.

Implementing the camera121with a laser sensor may allow detection of a touch of a physical object with respect to a 3D 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 (TRs) 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 location information of the physical object.

Also, the display151may be implemented as a stereoscopic display for displaying stereoscopic images.

The audio output module152may receive audio data from the wireless communication unit110or output audio data stored in the memory170during 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 module152can provide audible output related to a particular function (e.g., a call signal reception sound, a message reception sound, etc.) performed by the mobile terminal100. The audio output module152may also be implemented as a receiver, a speaker, a buzzer, or the like.

The memory170can store programs to support operations of the control unit180and store input/output data (for example, phonebook, messages, still images, videos, etc.). The memory170may store data related to various patterns of vibrations and audio which are output in response to touch inputs on the touch screen.

The memory170may include one or more types of storage mediums including a flash memory type, a hard disk type, a solid state disk (SSD) type, a silicon disk drive (SDD) type, 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 terminal100may also be operated in relation to a network storage device that performs the storage function of the memory170over a network, such as the Internet.

The control unit180may typically control operations relating to application programs and the general operations of the mobile terminal100. For example, the control unit180may 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 control unit180can 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 control unit180can control one or a combination of those components in order to implement various exemplary implementations disclosed herein.

The power supply unit190receives external power or provides internal power and supply the appropriate power required for operating respective elements and components included in the HMD100under the control of the control unit180. The power supply unit190may include a battery, which is typically rechargeable or be detachably coupled to the terminal body for charging.

Referring toFIGS.3B and3C, the disclosed mobile terminal100includes a bar-like terminal body. However, the mobile terminal100may alternatively be implemented in any of a variety of different configurations. Examples of such configurations include watch type, clip-type, glasses-type, or 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. However, such teachings with regard to a particular type of mobile terminal will generally apply to other types of mobile terminals as well.

Here, considering the mobile terminal100as at least one assembly, the terminal body may be understood as a conception referring to the assembly.

The mobile terminal100will generally include a case (for example, frame, housing, cover, and the like) forming the appearance of the terminal. In this implementation, the case is formed using a front case101and a rear case102. Various electronic components are interposed into a space formed between the front case101and the rear case102. At least one middle case may be additionally positioned between the front case101and the rear case102.

In some implementations, electronic components may also be mounted to the rear case102. Examples of those electronic components mounted to the rear case102may include a detachable battery, an identification module, a memory card and the like. Here, a rear cover103for covering the electronic components mounted may be detachably coupled to the rear case102. Therefore, when the rear cover103is detached from the rear case102, the electronic components mounted on the rear case102are exposed to the outside.

As illustrated, when the rear cover103is coupled to the rear case102, a side surface of the rear case102may partially be exposed. In some cases, upon the coupling, the rear case102may also be completely shielded by the rear cover103. Meanwhile, the rear cover103may include an opening for externally exposing a camera121bor an audio output module152b.

As an alternative to the example in which the plurality of cases form an inner space for accommodating components, the mobile terminal100may be configured such that one case forms the inner space. In this case, a mobile terminal100having a uni-body is formed in such a manner that synthetic resin or metal extends from a side surface to a rear surface.

The mobile terminal100may include a display unit151, first and second audio output module152aand152b, a proximity sensor141, an illumination sensor142, an optical output module154, first and second cameras121aand121b, first and second manipulation units123aand123b, a microphone122, an interface unit160, and the like.

Hereinafter, as illustrated inFIGS.3B and3C, description will be given of the exemplary mobile terminal100in which the front surface of the terminal body is shown having the display unit151, the first audio output module152a, the proximity sensor141, the illumination sensor142, the optical output module154, the first camera121a, and the first manipulation unit123a, the side surface of the terminal body is shown having the second manipulation unit123b, the microphone122, and the interface unit160, and the rear surface of the terminal body is shown having the second audio output module152band the second camera121b.

However, those components may not be limited to the arrangement. Some components may be omitted or rearranged or located on different surfaces. For example, the first manipulation unit123amay be located on another surface of the terminal body, and the second audio output module152bmay be located on the side surface of the terminal body other than the rear surface of the terminal body.

The display module151may include at least one of a liquid crystal display (LCD), a thin film transistor-LCD (TFT LCD), an organic light-emitting diode (OLED), a flexible display, a three-dimensional (3D) display and an e-ink display.

The display unit151may be implemented using two display devices, according to the configuration type thereof. For instance, a plurality of the display units151may 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 unit151may include a touch sensor that senses a touch with respect to the display unit151so as to receive a control command in a touch manner. Accordingly, when a touch is applied to the display unit151, the touch sensor may sense the touch, and a control unit180may generate a control command corresponding to the touch. Contents input in the touch manner may be characters, numbers, instructions in various modes, or a menu item that can be specified.

On the other hand, the touch sensor may be configured in a form of a film having a touch pattern and disposed between a window151aand a display (not illustrated) on a rear surface of the window, or may be a metal wire directly patterned on the rear surface of the window. Alternatively, the touch sensor may be formed integrally with the display. For example, the touch sensor may be disposed on a substrate of the display, or may be provided inside the display.

In this way, the display unit151may form a touch screen together with the touch sensor, and in this case, the touch screen may function as the user input unit (123, seeFIG.3A). In some cases, the touch screen may replace at least some of functions of a first manipulation unit123a.

The first audio output module152amay be implemented as a receiver for transmitting a call sound to a user's ear and the second audio output module152bmay be implemented as a loud speaker for outputting various alarm sounds or multimedia reproduction request sounds.

The window151aof the display unit151may include a sound hole for emitting sounds generated from the first audio output module152a. However, the present invention is not limited thereto, and the sounds may be released along an assembly gap between the structural bodies (for example, a gap between the window151aand the front case101). In this case, a hole independently formed to output audio sounds may not be seen or may otherwise be hidden in terms of appearance, thereby further simplifying the appearance of the mobile terminal100.

The optical output module154may be configured to output light for indicating an event generation. Examples of such events may include a message reception, a call signal reception, a missed call, an alarm, a schedule alarm, an email reception, information reception through an application, and the like. When a user has checked a generated event, the control unit180may control the optical output module154to stop the light output.

The first and second manipulation units123aand123bare examples of the user input unit123, which may be manipulated by a user to provide input to the mobile terminal100. The first and second manipulation units123aand123bmay also be commonly referred to as a manipulating portion. The first and second manipulation units123aand123bmay employ any method if it is a tactile manner allowing the user to perform manipulation with a tactile feeling such as touch, push, scroll or the like. The first and second manipulation units123aand123bmay also be manipulated through a proximity touch, a hovering touch, and the like, without a user's tactile feeling.

The drawings are illustrated on the basis that the first manipulation unit123ais a touch key, but the present disclosure may not be necessarily limited to this. For example, the first manipulation unit123amay be configured with a mechanical key, or a combination of a touch key and a push key.

The content received by the first and second manipulation units123aand123bmay be set in various ways. For example, the first manipulation unit123amay be used by the user to input a command such as menu, home key, cancel, search, or the like, and the second manipulation unit123bmay be used by the user to input a command, such as controlling a volume level being output from the first or second audio output module152aor152b, switching into a touch recognition mode of the display unit151, or the like.

On the other hand, as another example of the user input unit123, a rear input unit (not shown) may be disposed on the rear surface of the terminal body. The rear input unit may be manipulated by a user to input a command for controlling an operation of the mobile terminal100. The content input may be set in various ways. For example, the rear input unit may be used by the user to input a command, such as power on/off, start, end, scroll or the like, controlling a volume level being output from the first or second audio output module152aor152b, switching into a touch recognition mode of the display unit151, or the like. The rear input unit may be implemented into a form allowing a touch input, a push input or a combination thereof.

The rear input unit may be disposed to overlap the display unit151of the front surface in a thickness direction of the terminal body. As one example, the rear input unit may be disposed on an upper end portion of the rear surface 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. However, the present disclosure may not be limited to this, and the position of the rear input unit may be changeable.

When the rear input unit is disposed on the rear surface of the terminal body, a new user interface may be implemented using the rear input unit. Also, the aforementioned touch screen or the rear input unit may substitute for at least part of functions of the first manipulation unit123alocated on the front surface of the terminal body. Accordingly, when the first manipulation unit123ais not disposed on the front surface of the terminal body, the display unit151may be implemented to have a larger screen.

On the other hand, the mobile terminal100may include a finger scan sensor which scans a user's fingerprint. The controller may use fingerprint information sensed by the finger scan sensor as an authentication means. The finger scan sensor may be installed in the display unit151or the user input unit123.

The microphone122may be configured to receive the user's voice, other sounds, and the like. The microphone122may be provided at a plurality of places, and configured to receive stereo sounds.

The second camera121bmay be further mounted to the rear surface of the terminal body. The second camera121bmay have an image capturing direction, which is substantially opposite to the direction of the first camera unit121a.

The second camera121bmay include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix form. The cameras may be referred to as an ‘array camera.’ When the second camera121bis implemented as the array camera, images may be captured in various manners using the plurality of lenses and images with better qualities may be obtained.

The flash124may be disposed adjacent to the second camera121b. When an image of a subject is captured with the camera121b, the flash124may illuminate the subject.

The second audio output module152bmay further be disposed on the terminal body. The second audio output module152bmay implement stereophonic sound functions in conjunction with the first audio output module152a, and may be also used for implementing a speaker phone mode for call communication.

At least one antenna for wireless communication may be disposed on the terminal body. The antenna may be embedded in the terminal body or formed in the case. For example, an antenna which configures a part of the broadcast receiving module111(seeFIG.3A) may be retractable into the terminal body. Alternatively, an antenna may be formed in a form of film to be attached onto an inner surface of the rear cover103or a case including a conductive material may serve as an antenna.

The terminal body is provided with a power supply unit190(seeFIG.3A) for supplying power to the mobile terminal100. The power supply unit190may include a batter191which is mounted in the terminal body or detachably coupled to an outside of the terminal body.

The battery191may receive power via a power cable connected to the interface unit160. Also, the battery191may be (re)chargeable in a wireless manner using a wireless charger. The wireless charging may be implemented by magnetic induction or electromagnetic resonance.

On the other hand, the drawing illustrates that the rear cover103is coupled to the rear case102for shielding the battery191, so as to prevent separation of the battery191and protect the battery191from an external impact or foreign materials. When the battery191is detachable from the terminal body, the rear case103may be detachably coupled to the rear case102.

An accessory for protecting an appearance or assisting or extending the functions of the mobile terminal100may further be provided on the mobile terminal100. As one example of the accessory, a cover or pouch for covering or accommodating at least one surface of the mobile terminal100may be provided. The cover or pouch may cooperate with the display unit151to extend the function of the mobile terminal100. Another example of the accessory may be a touch pen for assisting or extending a touch input onto a touch screen.

As described above, in the electronic device300according to the present disclosure, the first wireless communication unit116(refer toFIG.3C) provided on the rear side of the mobile terminal and the second wireless communication unit283provided on the first body210of the case200may perform data communication with each other. Hereinafter, a method of performing data communication between the first and second wireless communication units116and283will be described in more detail with accompanying drawings.FIG.4is a conceptual view illustrating a control method between display units provided on a mobile terminal and a case in an electronic device in accordance with the present disclosure.

The mobile terminal100according to the present disclosure may be coupled to the first body210. When the mobile terminal100is coupled to the first body210, the first and second wireless communication units116and283may face each other.

The first wireless communication unit116provided in the mobile terminal100may be included in the wireless communication unit110described above with reference toFIG.3A. The wireless communication unit110of the mobile terminal100may include a plurality of wireless communication parts, and the plurality of wireless communication parts may be respectively disposed at different positions on the mobile terminal100. In particular, in the mobile terminal100according to the present disclosure, the first wireless communication unit116may be provided on the rear side of the mobile terminal100. Accordingly, when the mobile terminal is coupled to the first body210, the first wireless communication unit116may perform data communication with the second wireless communication unit283provided on the first body210.

The first and second wireless communication units116and283according to the present disclosure may be provided with contactless connectors for data communication. The contactless connectors may be electromagnetic connectors that form electromagnetic communication links, and may be disposed on different devices to establish the electromagnetic communication links.

The first and second communication units116and283may include transceivers for converting electrical signals into electromagnetic (EM) signals. The transceiver of any one of the first and second communication units116and283may convert electrical signals into EM signals. These EM signals may be received by another transceiver, which may convert the EM signals into the electrical signals.

Meanwhile, in the present disclosure, the term “transceiver” may refer to a device such as an integrated circuit (IC) including a transmitter Tx and a receiver Rx that are used for transmitting and receiving information (data). In general, a transceiver may be operable in a half-duplex mode (alternating transmission and reception) and a full-duplex mode (simultaneous transmission and reception), or may be configured as either a transmitter or a receiver. The transceiver may include separate integrated circuits for a transmitting function and a receiving function. The terms “contactless”, “coupled pair” and “proximity coupling”, as used herein, refer to implementing electromagnetic (EM) connection and signal transfer rather than electrical (wired, contact-based) connection and signal transfer between the first and second wireless communications units116and283.

As used herein, the term “contactless type” may refer to a carrier-assisted, dielectric coupling system that may have an optimal range in the range of 0 to 5 centimeters. The connection may be verified by proximity of one of the first and second wireless communication units116and283with respect to the other. A plurality of contactless transmitters and receivers may occupy a small space. Electromagnetically established contactless links may be point-to-point type links, unlike wireless links that typically broadcast to several points.

The first and second communication units116and283may establish a wireless connection to transmit data from one location to another, or may establish a point-to-point contactless communication link that or coupled-pair which does not require a physical wired connection. Transceivers may be extremely high frequency (EHF) transceivers.

For example, when the mobile terminal100is coupled to the first body210, the first wireless communication unit116of the mobile terminal100and the second wireless communication unit283of the first body210may face each other within a preset distance. Accordingly, a contactless communication link may be established between the first and second wireless communication units116and283.

Data transmission between the mobile terminal100and the second display unit250may be performed through the EHF transceivers included in the first and second wireless communication units116and283, respectively.

The second wireless communication unit283, namely, the EHF transceiver that transmits and receives data for the second display unit250may be provided on the first body210, as illustrated inFIGS.2A,2B, and2C.

The second wireless communication unit283provided on the first body210may perform data transmission and reception in a wired manner with the second display unit250through the wiring part242included in the connecting portion230.

Meanwhile, as described above, as the mobile terminal100is coupled to the first body210, the EHF transceivers included in the first and second wireless communication units116and283, respectively, may be coupled to each other through proximity coupling.

The EHF transceiver pair coupling between the first and second wireless communication units116and283may provide a contactless data path, passage, or channel. In some implementations, data paths are unidirectional (e.g., data flow from the mobile terminal100to the second display unit250through a specified passage) or bidirectional (e.g., bidirectional data flow between the mobile terminal100and the second display unit250through a specified passage).

The first and second wireless communication units116and283according to the present disclosure may be configured to transmit and receive various types of data. For example, the data may be one of graphic data, audio data, video data, touch event data, and a combination thereof.

On the other hand, the second display unit250provided on the second body220may be operated by power supplied from the mobile terminal100.

At this time, as described above, power may be supplied to the second display unit through an electrical connection path defined by the first circuit board243electrically connected to the mobile terminal100, the wiring part242provided in the connecting portion230, and the second circuit board provided in the second body220.

That is, as illustrated inFIG.4, a power supply unit191of the mobile terminal100may supply an operating current (or power) to a power supply unit291of the second display unit250through the electrical connection path defined by the first circuit board243, the wiring part242provided in the connecting portion, and the second circuit board244of the second body220.

On the other hand, as aforementioned, the mobile terminal100may be detachably coupled to the first body210. In addition, the mobile terminal may be configured to detect whether it is coupled to the first body210. For the detection, the first body210may include a magnet245(seeFIG.4) on one surface facing the mobile terminal100. The mobile terminal100may include a hall sensor143(seeFIG.4) disposed on its rear side to sense a magnetic field corresponding to the magnet245when the body of the mobile terminal is coupled to the first body210. When the magnetic field is sensed by the hall sensor, the mobile terminal may recognize that it has been coupled to the case and perform a preset control.

For example, when the magnetic field is sensed by the hall sensor143, a control unit180of the mobile terminal100may control a power supply unit190to supply an operating current to the second display unit250disposed on the second body220.

That is, the second display unit250provided on the second body220may be operated by power supplied from the mobile terminal100.

In this way, when the operating current is supplied to the second display unit250, the system of the second display unit250may be booted up and initialized, and may be in an operable standby state.

At this time, the second display unit250may have any one of an active state and an inactive state. Even in the inactive state of the second display unit250, a touch sensor (or touch panel)252provided on the second display unit250may be activated so as to detect a touch applied to the second display unit250.

On the other hand, when the second display unit250is activated, the mobile terminal100may transmit screen information (digital image information) to be output to the display251provided on the second display unit250through the first wireless communication unit116. At this time, as described above, the digital image signal may be transmitted as a signal of a frequency band of 60 GHz wirelessly through a wireless connector.

As described above, the second display unit250may receive data (e.g., a digital image signal, and the like) from the first wireless communication unit116through the second wireless communication unit283and the second circuit board244. In this case, the digital image signal may be converted into a format that can be output to the second display unit250through a data converter282. For example, the second display unit250may be implemented as an LCD panel. At this time, the digital image signal in a DP format, received from the mobile terminal100, may be converted into a data format (MIPI format) that the LCD panel can receive through the data converter282, and transmitted and output to the display251.

Meanwhile, types of data transmitted and received through the first and second wireless communication units116and283may be preset. For example, only data corresponding to image signals may be transmitted and received through the first and second wireless communication units116and283.

At this time, signals such as a communication control signal, a touch signal, and a brightness control signal, which are required to be transmitted between the mobile terminal100and the second display unit250, except for the image signal, may be transmitted and received sequentially via multiple input channels, first and second signal processing units181and281, the first circuit board243, and the power terminal (e.g., the pogo-pin)249. Meanwhile, the initialization of the second display unit250may be controlled by a controller included in the second display unit250.

Hereinafter, a screen control method between the first display unit provided in the mobile terminal and the second display unit provided in the case in the electronic device300according to the present disclosure will be described in more detail with reference toFIGS.5A to5F.

InFIG.5A, the first display unit151provided in the mobile terminal100may be in an active state, and the second display unit250provided in the case200may be in an inactive state.

In one example, when the electronic device300is switched from a closed state to an open state, the first display unit151may be switched to an active state, and for example, a home screen510may be output.

When the electronic device300is switched from the closed state to the open state, an operating current may be supplied to the second display unit250but may be maintained in the inactive state until an input is applied. Here, the input may be applied to wake the second display unit250up, and for example, may be a touch input (e.g., a tap/double tap, hereinafter ‘knock-knock function’) applied to the second display unit250.

When a touch input is applied to the second display unit250, a touch signal corresponding to the touch input may be transmitted to the first wireless communication unit116through the second wireless communication unit283(FIG.4). Then, the control unit180of the mobile terminal may determine whether the touch signal received through the first wireless communication unit corresponds to a preset type of touch. As a result of the determination, when the touch signal is the preset type of touch (e.g., a tap/double tap), the control unit may generate a control signal for switching the second display unit250to an active state and transmit the control signal to the second display unit250through the first wireless communication unit116and the second wireless communication unit283.

Meanwhile, in another example, when the electronic device300is switched from a closed state to an open state, both the first display unit151and the second display unit250may be in an active state. In this case, for example, a first home screen may be output to the first display unit151and a second home screen different from the first home screen or a predetermined screen may be output to the second display unit250.

On the other hand, an icon520that indicates hidden menus related to the control of the second display unit250may be displayed on one area, for example, an edge area of the home screen510output on the first display unit151. The icon520may be moved to a different position or may be hidden151, in response to a drag touch input.

The control unit of the mobile terminal100may display hidden menus on the first display unit151based on a touch input applied to the displayed icon520. An image (→) guiding a drag direction of a touch input for displaying the hidden menus may be displayed on the icon520.

For example, as illustrated inFIG.5B, in a state where the home screen510is output to the first display unit151and an execution screen530of a web application is output to the second display unit250, when a touch input applied to the icon520of the home screen510is dragged from the edge area toward a center of the first display unit151, the hidden menus may be displayed.

The displayed menus may provide various functions for interoperably controlling the first display unit151and the second display unit250based on an input to the first display unit151. For example, as illustrated inFIG.5B, a screen switching menu521, a screen sending menu522, a screen importing menu523, a main screen power saving menu524, and a dual screen-off menu525may be provided. However, the present disclosure may not be limited to the illustrated examples, and more other menus may be displayed.

FIGS.5C to5Fspecifically illustrate various functions for cooperatively controlling the first display unit151and the second display unit250based on a touch input applied to a menu displayed on the first display unit151.

Hereinafter,FIG.5Cillustrates an operation corresponding to a switching function between a screen displayed on the first display unit151to a screen displayed on the second display unit250.

Referring toFIG.5C, first screen information, for example, a home screen510may be output to the first display unit151and second screen information, for example, an execution screen530of a web application may be output to the second display unit250.

As described above, in a state where different pieces of screen information are output to the first display unit151and the second display unit250, when a touch input is applied to the screen switching menu521among the menus displayed on the first display unit151, the home screen510being output on the first display unit151may move to the second display unit250. At the same time, the execution screen530being output on the second display unit250may move to the first display unit151.

To this end, the control unit of the mobile terminal100may move a task corresponding to the home screen510output on the first display unit151to a memory stack allocated for the second display unit250. In addition, the control unit of the mobile terminal100may move a task corresponding to the execution screen530output on the second display unit250to a memory stack allocated for the first display unit151.

In this way, after the screen switching between the first display unit151and the second display unit250, when an input for displaying the hidden menus again is applied and the screen switching menu521is selected, the screens may be restored to their original states.

To this end, the control unit of the mobile terminal100may move the most recently input task in the memory stack allocated for the second display unit250back to the memory stack for the first display unit151. At the same time, the control unit of the mobile terminal100may move the most recently input task in the memory stack for the first display unit151to the memory stack allocated for the second display unit250.

Meanwhile, although not shown, when the screen sending menu522is selected on the first display unit151, only the screen being output on the first display unit151may be moved to the second display unit250.

To this end, the control unit of the mobile terminal100may move a task corresponding to the screen being output on the first display unit151to the memory stack allocated for the second display unit250. In this case, a screen corresponding to the next task of the memory stack for the first display unit151may be output to the first display unit151. At this time, if there is no next task, the home screen may be output.

The screen importing menu523of the first display unit151may be activated when the second display unit250is in an active state and at least the screen sending menu522has been executed.

When the screen importing menu523is selected in a state that such conditions are satisfied, the screen which has been output on the first display unit151and is currently output on the second display unit250may be displayed back on the first display unit151. In addition, the screen that has been output on the second display unit250before the screen of the first display unit151is imported may appear back on the second display unit250.

To this end, the control unit of the mobile terminal100may move a task corresponding to the screen output on the second display unit151to the memory stack allocated for the first display unit151.

Hereinafter,FIG.5Dillustrates an operation corresponding to a function of switching only a screen displayed on the first display unit151to a power saving mode.

When a touch input is applied to the main screen power saving menu524among the menus displayed on the first display unit151, a control signal corresponding to the touch signal corresponding to the corresponding menu may be generated to execute a power saving mode for the first display unit151.

At this time, since only the first display unit151is executed in the power saving mode, an image signal corresponding to screen information output on the second display unit250may continuously be transmitted from the mobile terminal100to the second display unit250through the first and second wireless communication units116and283.

In response to the execution of the power saving mode for the first display unit151, brightness of the home screen510of the first display unit151may be adjusted darkly as illustrated inFIG.5D. On the other hand, the execution screen530of the second display unit250may be maintained in previous brightness.

Hereinafter,FIGS.5E and5Fillustrate operations corresponding to a function of controlling the second display unit250to be turned on/off by using a touch input to the first display unit151.

First, referring toFIG.5E, when the dual screen-off menu525displayed on the first display unit151is selected, the control unit180of the mobile terminal may transfer a control signal for switching the second display unit250to an inactive state to the second display unit250through the first wireless communication unit166and the second wireless communication unit283. Accordingly, as illustrated inFIG.5Ebelow, the second display unit250may be switched to an inactive state.

Then, the icon (hereinafter, ‘first icon’)520indicating that there are hidden menus displayed on the first display unit151may be switched to another icon (hereinafter ‘second icon’)520′ indicating a locked state.

As described above, as the second display unit250is switched to an inactive state based on the input to the first display unit151, an operating current which is supplied from the mobile terminal100to the second display unit250may not be supplied any more.

However, when a memory stack for screen information output on the second display unit250is allocated to the mobile terminal100, the mobile terminal100may recognize the task corresponding to the screen information output on the second display unit250.

In this way, after the dual screen-off menu525is selected, as illustrated inFIG.5F, when a touch input applied to the second icon520′ is dragged in a predetermined direction, for example, toward a center of the edge area of the first display unit151, only a dual screen-on menu525′ may be displayed.

When a touch input is applied to the dual screen-on menu525′, the control unit180of the mobile terminal may transmit a control signal for switching the second display unit250to an active state to the second display unit250through the first wireless communication unit166and the second wireless communication unit283. Then, the operating current may be supplied from the mobile terminal100to the second display unit250again.

In this case, the screen information530that was output immediately before switching to the inactive state may be output again to the second display unit250. To this end, the control unit180of the mobile terminal may control states tasks of the memory stack allocated for the second display unit250to be maintained. In another example, unlikeFIG.5F, a home screen may be output to the second display unit250switched to the active state.

As such, when the second display unit250is turned on, the second icon520′ displayed on the first display unit151may be switched to the first icon520indicating that there are the hidden menus.

On the other hand, instead of using the icon520, a first screen displayed on the first display unit151may be sent to the second display unit250or a second screen displayed on the second display unit250may be sent to the first display unit151using a preset touch gesture. Here, the preset touch gesture may be a multi-finger touch gesture.

For example, as illustrated inFIG.5G, in a state where first screen information540is displayed on the first display unit151and second screen information530is displayed on the second display unit250, when a three-finger touch gesture applied to the second display unit250is dragged toward the first display unit151, the second screen information530displayed on the second display unit250may be sent to the first display unit151. In other words, a task of the memory stack allocated for the second display unit250may move to the memory stack for the first display unit151.

Accordingly, an application corresponding to the first screen information540displayed on the first display unit151may be located on a background and the second screen information530may be displayed on the first display unit151. In addition, a screen of an application which is currently executed on the background or a home screen531may be displayed on the second display unit250.

Similarly, as illustrated inFIG.5h, in a state where the first screen information540is displayed on the first display unit151and the second screen information530is displayed on the second display unit250, when a three-finger touch gesture applied to the first display unit151is dragged toward the second display unit250, the first screen information540displayed on the first display unit151may be sent to the second display unit250. In this case, a task of the memory stack allocated for the first display unit151may move to the memory stack for the second display unit250.

Accordingly, an application corresponding to the second screen information530displayed on the second display unit250may be located on a background and the second screen information530may be displayed on the second display unit250. In addition, a screen of an application which is currently executed on the background or a home screen may be displayed on the first display unit151.

Meanwhile, the electronic device300according to the present disclosure can use various camera functions related to a preview screen more efficiently using the second display unit250of the case while the preview screen is displayed on the first display unit151in response to an activation of a camera.

Hereinafter, an exemplary operation of a control method of an electronic device according to the present disclosure will be described in more detail with reference toFIG.6.

Referring toFIG.6, in the electronic device according to the present disclosure, the control unit180of the mobile terminal may recognize a state in which first screen information is displayed on the second display unit250of the case and a preview screen output in response to an activation of a camera is displayed on the first display unit151of the mobile terminal (S10).

To this end, both the first and second display units151and250may be maintained in an active state. Also, the type of the first screen information may not be limited at all.

Also, the camera may be either a front camera121aor a rear camera121bprovided on the mobile terminal. In this regard, referring back toFIG.1A, in the electronic device according to the present disclosure, the mobile terminal coupled to the first body210may include the front camera121ahaving a plurality of camera lenses L1, L2, and L3disposed on an upper end of a front surface. The plurality of camera lenses L1, L2, and L3may be selectively operated. In addition, the plurality of camera lenses L1, L2, and L3may include a telephoto lens, a normal angle lens, and a wide angle lens, and may be configured with fewer or greater than those three camera lenses L1, L2, and L3. The camera may also be activated (operated) by the control unit180in response to an execution of a camera application.

As described above, in the state in which the preview screen in response to the activation of the camera is displayed on the first display unit151, the control unit180may detect a preset touch input received on the first display unit151(S20).

Here, the preset touch input may be defined as a touch point of a touch input applied to the first display unit151or a touch type of the touch input is a preset position or a preset type.

For example, the preset touch input may refer to a touch input that a touch point of the touch input applied to the first display unit151is located in a predetermined area or on a specific icon. Also, for example, the preset touch input may be a preset touch gesture (e.g., a double tap, a long touch input, etc.) applied to a specific icon of the first display unit151.

The preset touch input may also be defined as an input/request for executing a predetermined camera function related to the preview screen displayed on the first display unit151. In this case, the preset touch input may be modified into another input method such as a voice command or a user gesture.

As described above, when the preset touch input is applied while the preview screen is displayed on the first display unit151, the control unit180of the mobile terminal may execute an expanded preview mode for utilizing the second display unit250.

The expanded preview mode may be defined as an operation mode for performing a camera function related to the preview screen of the first display unit151by using the second display unit250.

According to the execution of the expanded preview mode, the control unit180may generate a control signal for displaying second screen information corresponding to the camera function related to the preview screen on the second display unit250. Then, the control unit180may transmit the control signal to the second display unit250through the wiring part242connected to the case and the second wireless communication unit283connected to the wiring part242(S30).

In other words, according to the entry of the expanded preview mode, the second display unit250may be used as an area related to a camera function of a capturing mode performed on the first display unit151. To this end, the second screen information may be used as an auxiliary screen of a camera function applied/to be applied to the preview screen displayed on the first display unit151.

Next, according to the control signal, the first screen information displayed on the second display unit250may be changed to the second screen information while the display state of the preview screen of the first display unit151is maintained (S40).

Specifically, a task of an application corresponding to the second screen information may be stored in the memory stack allocated for the second display unit250. Accordingly, the application corresponding to the first screen information may move to a background of the second display unit250and the second screen may be displayed on the second display unit250.

Hereinafter, each process ofFIG.6will be described in more detail with reference toFIGS.7A to7D.

First, referring toFIG.7A, in an active state of the first and second display units151and250, a home screen701may be output on the first display unit151and an execution screen (hereinafter, ‘first screen information’) of, for example, a map application may be output on the second display unit250.

A camera application may be executed using an icon/widget on the home screen701of the first display unit151. When a camera disposed on the mobile terminal100is operated in response to the execution of the camera application, a preview screen710(hereinafter, referred to as ‘preview screen’) corresponding to the execution of the camera application on the first display unit151, as illustrated inFIG.7B.

At this time, an icon area750for selectively applying a plurality of camera angles of view corresponding to a plurality of lenses L1, L2, and L3disposed on the front surface of the mobile terminal may be displayed on the preview screen710, and each icon (e.g.,752) corresponding to each camera angle of view may be displayed in the icon area750.

When a proximity touch is applied to a specific icon752in the icon area750, the control unit180may pop up guide information760for informing a camera angle of view (e.g., a telephoto angle, a normal angle, and a wide angle) that matches the icon752. And, when a touch is applied to the corresponding icon752, the control unit180may switch a currently applied lens (e.g., L1) to another lens having a different angle of view that matches the corresponding icon752.

InFIG.7C, in response to a preset touch input, for example, a long touch input being applied to the specific icon752, the control unit180may operate to enter the expanded preview mode.

Accordingly, as illustrated inFIG.7D, sub preview screens to which the camera angles of view matching respective icons displayed in the icon area750are actually applied may be displayed as second screen information740on the second screen information740. That is, the first screen information720displayed on the second display unit250may be switched to the second screen information740.

In the first display unit151, even if the angle of view of the displayed preview screen710is changed, the changed angle of view is not reflected to the preview screen710. Accordingly, the user had to check an actual image, to which a selected angle of view was applied, only after performing a process of capturing the preview screen710and selecting a captured image view or a stored image view.

However, in the present disclosure, as illustrated inFIG.7D, images to which different angles of view are applied can be immediately checked and compared through the sub preview screens742,743, and744of the second display unit250.

In this case, while the second screen information740is displayed, the control unit180may synchronize the preview screen710displayed on the first display unit151with images of the sub preview screens742,743, and744displayed on the second display unit250. Accordingly, when the image of the preview screen710changes due to movement of the electronic device300or movement of an object to be captured, the images of the sub preview screens742,743, and744displayed on the second display unit250may be synchronized accordingly.

As described above, in the present disclosure, the sub preview screens to which the plurality of angles of view are applied can be previewed on a larger screen while maintaining the size of the preview screen displayed on the first display unit151.

In this state, the control unit180may switch a camera lens to be applied to the preview screen710based on an input applied to the icon area750displayed on the first display unit151. Alternatively, the control unit180may switch a camera lens to be applied to the preview screen710based on the selection of the plurality of sub preview screens742,743, and744displayed on the second display unit250.

Specifically, the control unit180may receive a touch signal of a touch input applied to any one of the plurality of sub preview screens from the second display unit250, and select a camera angle of view that matches the received touch signal.

Then, the control unit180may control the plurality of lenses L1, L2, and L3provided in the mobile terminal100to be switched to a lens corresponding to a determined angle of view.

The control unit180may apply a camera angle of view corresponding to the switched lens to the preview screen of the first display unit151. At this time, a graphic object (e.g., a selected image) indicating the applied camera angle of view may be displayed on one sub preview screen to which the touch input has been applied.

In detail, the control unit180may receive a touch signal of a touch input for changing the angle of view, applied to the icon area750, from the first display unit151, and control the plurality of lenses L1, L2, and L3to be changed to a camera angle of view that matches the received touch signal. Then, the control unit180may apply the changed angle of view to the preview screen of the first display unit151.

In this case, the control unit180may control the second display unit250to display the graphic object on a sub preview screen that matches the changed angle of view. In other words, the control unit180may transmit a control signal for displaying the graphic object on the matched sub preview screen to the second display unit250through the wiring part242and the second wireless communication unit283.

As described above, in the present disclosure, while the preview image of the camera is displayed through the first display unit151, screens for applying multiple lenses applicable to the preview image may be previewed at once through the second display unit250. Accordingly, the sub preview screens to which the plurality of angles of view are applied can be viewed on a larger screen using the second display unit250while maintaining the size of the displayed preview screen, whereby improvement of usability of functions can be expected.

Hereinafter, various implementations related to camera functions to be applied to the preview image using the second display unit250while the preview image is displayed on the first display unit151will be described in detail, with reference toFIGS.8A,8B,8C,8D,8E,9A,9B,10A,10B,100,10D,11A,11B,12A,12B,12C,13A,13B, and13C.

First, a method of checking a preview screen in a large size, to which a changed angle of view is actually applied, and capturing the preview screen while viewing it in an expanded preview mode will be described with reference toFIGS.8A,8B,8C,8D, and8E.

Referring toFIG.8A, as the expanded preview mode is executed, sub preview images having a plurality of angles of view, which match the plurality of lenses, may be displayed as the second screen information on the second display unit250while the preview screen710is displayed on the first display unit151.

At this time, when a touch input is applied to a menu741b, which is disposed in a predetermined area, for example, an upper end area of the second screen information740for capturing the sub preview images of the second display unit250, to which a camera angle of view has been actually applied, the control unit180may control the second display unit250to display third screen information810(FIG.8C), on which one of the plurality of sub preview images included in the second screen information740is expanded to the entire second display unit250. This may be defined as a ‘mirror mode’ has been executed.

In this case, any one of the plurality of sub preview screens may be defined as a sub preview image that matches a selected angle of view. Referring toFIG.8C, a capturing icon811for photographing the displayed sub preview screen may be displayed on the third screen information810.

The user can perform photographing (capturing) by applying a touch to the capturing icon811displayed on the third screen information810. In other words, the user can take a picture while looking at the preview screen that is the same as the preview screen displayed on the first display unit151and to which the selected angle of view has been actually applied. Accordingly, since the user does not have to view alternately the second display unit250for checking the sub preview images, to which the selected angle of view has actually been applied, and the first display unit151on which the capturing is actually carried out, the user can more concentrate on a subject to capture.

Also, in one example, as illustrated inFIG.8B, when a touch input is applied to a predetermined area741bof the second screen information740displayed on the second display unit250, guide information711informing that capturing can be performed on the second display unit using the third screen information later (execution of a ‘mirror mode’) may be popped up on the preview screen of the first display unit151.

The guide information711may not be output when the second display unit250is switched to an inactive state. The guide information711may disappear when a predetermined time elapses or there is an acknowledgment.

Also, in an implementation, in the state in which the mirror mode has been executed, as illustrated inFIG.8D, a camera angle of view for a subject to be captured may change differently based on a touch input applied to the icon area750displayed on the first display unit151.

For example, when icons751and752corresponding to a telephoto angle, a normal angle, and a wide angle matching the plurality of lenses L1, L2, and L3are displayed in the icon area750and a currently applied camera angle of view is the normal angle, a first preview screen710displayed on the first display unit151and a second preview screen810displayed on the second display unit250may be the same as each other.

At this time, when a touch is applied to the icon751corresponding to the telephoto angle in the icon area750, a lens corresponding to the touched icon751may be operated and thus a currently applied camera angle of view may be changed to the telephoto angle. Accordingly, as illustrated inFIG.8E, the second preview screen810to which the telephoto angle has been actually applied may be displayed on the second display unit250. Even at this time, the first preview screen710displayed on the first display unit151may be maintained as before.

According to the implementation, an angle of view to be applied to a subject to be captured can be determined while viewing an image, to which an angle of view has been actually applied, and the subject can be captured with the determined angle of view, on the second display unit. In addition, various angles of view can be compared by quickly changing them with respect to a subject to be captured. This may result in improving user convenience and usability.

As an additional implementation, a screen control method for the second display unit250when a camera function operated through the second display unit250is terminated will be described with reference toFIGS.9A,9B,11A, and11B.

First, referring toFIGS.9A and9B, a camera preview screen901may be displayed on the first display unit151, and second screen information902that corresponds to an expanded preview mode may be displayed on the second display unit250according to a preset touch input (e.g., ‘long touch input’) applied to a specific icon952of an icon area950of the preview screen901. An icon930for terminating the expanded preview mode may be displayed on the second screen information902.

The control unit180may terminate the expanded preview mode based on a touch input applied to the second screen information902, for example, a touch input applied to the icon930, and control the second display unit250to display first screen information903. In this case, the first screen information903may be a screen which has been output to the second display unit250before entering the expanded preview mode or a home screen. Meanwhile, even at this time, the preview screen901displayed on the first display unit151may be maintained.

Referring toFIGS.11A and11B, a camera preview screen1101may be displayed on the first display unit151, and second screen information1003that corresponds to a ‘reflector capturing mode’ may be displayed on the second display unit250according to a touch input applied to a flash icon1021located on one area (e.g., upper end area) of the preview screen1101. The reflector capturing mode will be described in more detail later.

In this state, in response to an additional touch input being applied to the flash icon1021displayed on the first display unit151, the control unit180may terminate the reflector capturing mode, and control the second display unit250display first screen information1102, which has been output before the reflector capturing mode. Even at this time, the preview screen1101displayed on the first display unit151may be maintained. At this time, the flash icon may be changed to an image1022indicating another toggled setting function (e.g., flash-on).

Hereinafter, a method of applying a reflector function to a subject to be captured and easily adjusting a white balance using the second display unit250will be described with reference toFIGS.10A,10B,100, and10D.

First, referring toFIG.10A, a preview screen1001of a camera may be displayed on the first display unit151, and second screen information1002corresponding to the expanded preview mode may be displayed on the second display unit250. In this state, the control unit180may recognize a touch input that is applied to an icon1020for executing a reflector capturing mode (or a reflector capturing function) on the first display unit151.

The illustrated icon1020may be toggled with a different setting function depending on an icon image which is output at the time when a touch input is applied. For example, settings of flash-off, flash-on, and a reflector for a reflector capturing mode may be toggled in a preset order whenever a touch input is applied. Also, an image of the icon1020may vary depending on a toggled function.

The flash-on setting may activate a flash of the first display unit151. On the other hand, the reflector setting may activate the second display unit250as a reflector to provide a reflector function when capturing a subject through the first display unit151.

When the reflector capturing mode is executed according to the reflector setting in the first display unit151, as illustrated inFIG.10B, an image1003of a reflector to be applied to the preview screen1001of the first display unit151may be displayed as the second screen information on the second display unit250. The image1003of the reflector may be displayed with a reflector of a predetermined color (e.g., silver or white) in an initial state. And, a preview screen1001′ to which a reflector function has been actually applied may be displayed on the first display unit151.

The reflector function may be applied when the front camera121aof the mobile terminal is operated and a preview screen is displayed on the first display unit151. Therefore, if the rear camera121bis operated, guide information informing that the reflector function cannot be applied may be output.

Also, in one example, as illustrated inFIG.100, when the reflector image1003is output to the second display unit250, guide information1011for guiding the reflector capturing mode may be displayed on the first display unit151for a predetermined time. When the reflector capturing mode is executed as described above, the reflector image1003displayed on the second display unit250may become a reflector and apply reflected light to the subject. Accordingly, contrast of an image can be mitigated, a brighter image can be obtained, and soft light can be applied to a subject even when capturing against light.

A control bar/adjustment bar1030may be output to the reflector image1003so that a white balance (WB) value of reflected light to be applied to the subject can be easily adjusted.

As illustrated inFIG.10D, the WB value may be adjusted according to a drag touch input (e.g., a touch input slid in a left and right direction) applied to the control bar/adjustment bar1030output on the second display unit250, the reflector image of the second display unit250may change to correspond to the adjusted WB value. Such a change in brightness of the reflector image1003may be applied only to the second display unit250, and may be operated separately from system brightness of the electronic device300. Accordingly, screen brightness of the first display unit151may be maintained as before.

Hereinafter, a method of synchronizing sub preview screens corresponding to a plurality of angles of view displayed on the second display unit when a screen magnification is adjusted on a preview screen after the expanded preview mode is executed will be described with reference toFIGS.12A to12C.

ReferringFIG.12A, while a preview screen1201of a camera is displayed on the first display unit151, multi-angle sub preview screens for the preview screen1201may be displayed as second screen information1202on the second display unit250. At this time, a menu area1220for executing the mirror mode may additionally be displayed in one area of the second screen information1202.

In this state, when a pinch-out gesture T is applied to the preview screen1201of the first display unit151, a preview screen1201′ in which the screen magnification is zoomed in may be displayed as illustrated inFIG.12B. Such adjustment of the screen magnification cannot be immediately reflected on the sub preview screens of the second display unit250. Accordingly, guide information1230indicating that the corresponding function (screen zoom-in function) is not supported may be popped up to the second display unit250.

Even at this time, when a touch signal of a touch input applied to a specific icon1252in the icon area of the first display unit151is received by the control unit180, the control unit180may perform switching to a camera lens that matches the icon1252and apply the current camera angle of view.

In addition, the popped-up guide information1230may disappear after a predetermined time has elapsed. During the predetermined time, the sub preview screens of the second display unit250may be synchronized with the adjusted screen magnification. When the synchronization is completed, the guide information1230may disappear and, as illustrated inFIG.12C, a graphic object indicating a camera angle of view selected through the first display unit151before the completion of the synchronization may be displayed on one (e.g.,1242) of the sub preview screens1241,1242, and1243.

Hereinafter, a method of maintaining a preview screen for capturing a subject and capturing the subject while viewing a previously captured image by using the second display unit will be described with reference toFIGS.13A and13B.

First, as illustrated inFIG.13A, a camera preview screen1301may be displayed on the first display unit151, and first screen information, for example, a home screen1302, may be displayed on the second display unit250.

In this state, when a preset touch input is applied to the first display unit151, for example, a touch input is applied to a captured image viewing icon1310, the control unit180may control a gallery application to be executed on the second display unit250. Subsequently, the control unit180may control the second display unit250to display as the second screen information1303a stored image displayed on the icon1310, namely, a first image, which has been stored by being captured before the preview screen1310is displayed. Accordingly, the capturing may be continued through the first display unit151without interruption while viewing a captured image on a large screen.

Afterwards, as illustrated inFIG.13B, when the preview screen1301displayed on the first display unit151is captured through the capturing icon1311, the image of the icon1310may be changed to a currently captured image1310′.

In addition, the first image displayed on the second display unit250may be automatically switched to a second image1304that has been newly captured and stored in a gallery, or switched to the second image1304based on a touch input to the icon1310′.

FIGS.14A,14B,14C,15A,15B,16A,16B,17A, and17Bare views illustrating various implementations related to a screen control of first and second display units while a preview image on the first display unit is captured in response to an activation of a camera on the first display unit.

FIGS.14A,14B, and14Cillustrate a case where the second body rotates relative to the first body to be bent or folded backward such that the electronic device is switched to the fully open state, in a state in which a preview scree1401displayed on the first display unit151is a preview screen corresponding to the operation of the rear camera121bof the mobile terminal and first screen information1402is displayed on the second display unit250.

In this case, the rear camera121bmay be obscured by the second body, and thus guide information1410for inducing the use of the front camera121amay be provided on the preview screen of the first display unit151. On the other hand, when the electronic device that has been switched to the fully open state is switched back to the open state as illustrated inFIG.14A, the guide information1410may disappear.

FIGS.15A and15Billustrate a case of operating a recording (or video-capturing) function for a preview screen1501using a capturing icon1521in a state where the preview screen1501is displayed on the first display unit151and a video1502is displayed as first screen information on the second display unit250. At this time, guide information1510informing that the video being displayed on the second display unit250cannot be played may be popped up, and the control unit180may control the playback of the video1502to be stopped until the recording of the preview screen1501is stopped/finished by using a capturing icon1521′. When the recording of the preview screen1501is stopped/finished, total recording time information1511may be displayed on the first display unit151, and the video1502may be automatically played back, starting from the stopped time, on the second display unit250.

In addition, as illustrated inFIGS.16A and16B, in a state where a preview screen1601of a camera is displayed on the first display unit151, and screen information1602corresponding to the execution of the mirror mode1620is displayed on the second display unit250, when a touch input is continuously applied to the capturing icon1601displayed on the first display unit151, the control unit180may restrict an execution of burst-shot capturing and control the first display unit151to output corresponding guide information1630. At this time, the execution of the mirror mode in the second display unit250may be maintained.

As another example, as illustrated inFIGS.17A and17B, the display units of the electronic device300may be oriented in a landscape mode, a preview screen1601of a camera may be displayed on the first display unit151, and a plurality of sub preview screens corresponding to the execution of the expanded preview mode may be displayed on the second display unit250. In this state, the second body may be bent or folded backward such that the electronic device is in the fully open state.

In this case, a video screen set as a favorite may be played back on the second display unit250, instead of the sub preview screens, after changing the oriented direction of the electronic device. On the other hand, the preview screen of the first display unit151facing the user who captures the screen may be displayed continuously in the oriented direction.

At this time, in order for the rear camera121bof the mobile terminal100to be continuously used, an area R corresponding to the rear camera121bin the second body may be provided with a hole or made of a transparent/translucent material.

As described above, in a mobile terminal and an electronic device having the mobile terminal according to the present disclosure, various camera functions related to a preview screen can be used more efficiently by using an expanded display area. In the present disclosure, a plurality of sub preview screens, to which a plurality of angles of view are applied, can be previewed on a large screen through a second display unit while maintaining a size of a preview image of a camera displayed on a first display unit. Capturing a subject can be carried out by selecting an appropriate angle of view while viewing images, to which different angles of view have been actually applied, through the second display unit, thereby simultaneously improving user convenience and usability. A reflector function can be provided on a preview screen displayed on the first display unit by using the second display unit, such that contrast of an image can be mitigated, a brighter image can be obtained, and soft light can be applied to a subject even when capturing against light.