KR20150136913A - Display apparatus and control method thereof - Google Patents

Abstract

Provided are a display apparatus in which a user can easily video-call in a display apparatus by using identification information of a user terminal, and a control method thereof. The display apparatus of the present invention comprises: a communications unit connectable to an external device; a display unit for displaying an image of an application for a video call; and a control unit for executing the application, displaying information on an account related to the video call of the user corresponding to at least one external device connectable to the communications unit, and controlling the video call to be performed in a selected account based on permission information received from the external device corresponding to the selected account when any one of the displayed account is selected. Accordingly, a user can easily perform the video call with a display device for common use by logging in the account using the user terminal.

Description

[0001] DISPLAY APPARATUS AND CONTROL METHOD THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a display device and a control method thereof, and more particularly, to a display device and a control method thereof capable of facilitating a video call using a user terminal of a user.

In recent years, applications for Internet telephony have been downloaded using a user terminal and international telephones including general telephones have been used. After completing the process of registering an account on the user terminal, the user simply selects an application for the Internet phone displayed on the user terminal and connects to an external server corresponding to the application for Internet phone call You can log in to your account and use internet calling.

When the user terminal transmits the device information of the user terminal to an external server corresponding to the application for Internet calling, the external terminal determines whether it is the device information corresponding to the registered account, and if it is determined that the device information is registered If it is determined that the device information corresponding to the account exists, log-in can be facilitated. However, in the case of a display device provided in a home or a public place, a dad, a mother, a son, a daughter, etc., who are members of the family, use the display device publicly. , It is difficult to use video call.

FIG. 1 is a diagram illustrating a process of making a video call using a display device related to the present invention.

①  The user executes an application for video communication using a touch or a remote controller.

② When the application for video call is executed, a menu for file transfer, chat, voice call, and video call is displayed.

③ A user can input an ID (Ryan) and a password (****) of a user's account in order to log in as an external server corresponding to an application for video communication, Ryan) and a password (****).

④ Even if you log in to your account, you can process the payment for your subscription and other usage.

⑤ When you complete the checkout process, you will be logged in with your account (Ryan) and will be able to use video calls.

In addition, login information of the user 1 may be exposed to a display device as a common device, personal information of the user 1 may be exposed, and a user may log in to an external server corresponding to an application for video communication using a display device as a common device Security problems may arise.

It is possible to easily make a video call with a common display device by using a user terminal and to easily use a video call when a user carries a user terminal and a communication connection with a common display device, A display device capable of solving a security problem by blocking display of account information that can be logged in is required.

It is an object of the present invention to solve the problem of the display device related to the present invention described above, and it is an object of the present invention to provide a display device which can execute a video call application and transmit identification information of a user terminal to an external server corresponding to an application for video call, And a control method thereof.

According to an aspect of the present invention, there is provided a display device including: a communication unit connectable to an external device; A display unit for displaying an image of an application for video communication; Displaying the account information on the video call of the user corresponding to at least one external device connectable to the communication unit, and when any one of the displayed accounts is selected, And a controller for controlling the video call to be performed on the selected account based on permission information received from the external apparatus.

Here, the controller may select any one of the displayed accounts according to the account selection information received from the external device.

The control unit may request the external device corresponding to the selected account for permission to use the selected account, and control the external device to receive permission information from the external device.

Here, when the application is executed, the control unit can grasp the identification information of the external device connectable to the communication unit, and display the information of the account corresponding to the identification information.

The information processing apparatus according to claim 1, further comprising a user input unit for receiving a user input, wherein the control unit displays identification information of the external device, and based on the input of the received user, Information can be registered.

The control unit may be configured to display the external device connectable to the communication unit, receive input of the user, and register information of the account corresponding to the displayed external device can do.

The control unit may transmit identification information of the external device to an external server corresponding to the application, and display information of the account based on information received from the external server.

Here, the control unit may stop displaying the information of the account when the external device is disconnected from the communication unit.

The control unit may transmit a control command to the external apparatus, which causes the external apparatus to execute the application of the video call and log in to the account.

Here, the controller may control the display device to be synchronized with the external device.

According to another aspect of the present invention, there is provided a method of controlling a display device, including: executing an application for video communication; Displaying information of an account of the user on the video call corresponding to at least one external device connectable to the communication unit of the display device; Selecting one of the displayed accounts; Receiving permission information from the external device corresponding to the selected account; And controlling the video call to be performed on the selected account based on the received permission information.

Here, the step of selecting one of the above may include selecting one of the displayed accounts in accordance with the account selection information received from the external device.

The step of receiving the permission information may include requesting permission to use the selected account with the external device corresponding to the selected account.

Here, the step of displaying the information of the account may include: identifying the identification information of the external device connectable to the communication unit when the application is executed; And displaying information of the account corresponding to the identification information.

The step of recognizing the identification information may include the steps of: displaying identification information of the external device; And registering the information of the account corresponding to the external device of the displayed identification information based on the input of the received user.

Here, the step of displaying the information of the account may include: displaying the external device connectable to the communication unit; And registering the information of the account corresponding to the displayed external apparatus by receiving the input of the user.

The step of controlling to perform the video call may include transmitting identification information of the external device to an external server corresponding to the application; And controlling the information of the account to be displayed based on the information received from the external server.

Here, the step of displaying the information of the account may include stopping the display of the information of the account when the external device is disconnected from the display device.

The method may further include transmitting a control command to the external device to allow the external device to execute the application of the video call and log in to the account.

The method may further include controlling the display device to be synchronized with the external device.

According to the present invention, a login for a video call can be easily performed using a user terminal.

In addition, when a user carries a user terminal and communicates with a common display device, the user can easily use the video call, and after the video call is used, the display of the account information can be blocked so that the security problem can be solved .

FIG. 1 is a diagram illustrating a process of making a video call using a display device related to the present invention.
2 is a block diagram showing a configuration of a display device according to the present invention,
3 is a block diagram illustrating a configuration of a display device according to an embodiment of the present invention,
4 is a control flowchart showing the operation of the display apparatus according to the present invention,
5 is a control flowchart showing the operation of the display apparatus according to the embodiment of the present invention,
FIG. 6 is a view illustrating a process of making a video call in a display device according to an embodiment of the present invention.
7 is a diagram illustrating an operation of a display device, a user terminal, and an external server according to an exemplary embodiment of the present invention,
FIG. 8 is an exemplary view showing the display of information in the account is stopped in the display device according to another embodiment of the present invention,
9 is an exemplary diagram illustrating registration of an account for a user terminal in a display device according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Parts which are not directly related to the present invention are omitted for convenience of description, and the same or similar components are denoted by the same reference numerals throughout the specification.

2 is a block diagram showing a configuration of a display device 1 according to the present invention. The display device 1 according to the present invention may be implemented as a notebook computer, a smart TV, a monitor, a user terminal 2, or the like. It can also be applied to any display device 1 capable of viewing an image. The display device 1 according to the present invention may include a communication unit 110, a display unit 120, and a control unit 100.

The communication unit 110 may receive a signal from an external input and transmit the signal to the image processing unit 140 or the control unit 100. The communication unit 110 can receive a signal from the external input through a wired connection by connecting various external input cables or can receive a wirelessly received signal according to a predetermined wireless communication standard.

The communication unit 110 may include a plurality of connectors (not shown) to which the respective cables are individually connected. The communication unit 110 receives a signal from an external input, for example, a HDMI, a USB, a component standard, a video signal, a data signal, or the like, or receives communication data through a communication network .

The communication unit 110 may include a wireless communication module (not shown) for wireless communication or a tuner (not shown) for tuning a broadcasting signal, according to a design method of the display device 1 (Not shown), and the like. The communication unit 110 may transmit the information / data / signal of the image processing device to the external device 2 in addition to receiving the signal from the external device 2. [ That is, the communication unit 110 can not be limited to a configuration for receiving a signal to the external device 2, and can be implemented as an interface capable of bidirectional communication. The communication unit 110 can receive a control signal for selecting a UI from a plurality of control devices. The communication unit 110 may be a communication module for publicly known short range wireless communication such as Bluetooth, IR, UWB (Ultra Wideband), ZigBee, etc. and may be a known communication port for wired communication . The communication unit 110 may be used for various purposes such as a command for operating a display, transmission / reception of data, etc., in addition to a control signal for selecting a UI.

The display unit 120 can display an image based on a video signal output from the image processing unit 140 (see FIG. 2). The display unit 120 may be implemented in various forms including, but not limited to, a liquid crystal, a plasma, a light-emitting diode, an organic light-emitting diode, electron conduction electron-emitter, carbon nano-tube, nano-crystal, and the like.

The display unit 120 may further include an additional configuration depending on the implementation method. For example, when the display unit 120 is a liquid crystal type, the display unit 120 includes a liquid crystal display panel (not shown), a backlight unit (not shown) for supplying light thereto, And a panel drive substrate (not shown).

The display unit 120 displays an image based on the image signal processed by the image processing unit 140 (see FIG. 2). There is no limitation on the manner in which the display unit 120 displays an image, but includes a method of an LCD, a PDP, and an OLED. In this case, the display unit 120 may include an LCD panel, a PDP panel, an OLED panel, and the like.

The display unit 120 may display an image and a color correction process. The display unit 120 may include a display panel for displaying an image and a panel driver for displaying an image on the display panel by processing an input image signal. The image signal received from an external input source through the interface unit may be displayed on the display unit 120 through an image processing process such as decoding, deinterlacing, and scaling.

The control unit 100 executes an application and displays information of an account related to a video call of a user corresponding to at least one external device 2 connectable to the communication unit 110. If any of the displayed accounts is selected, And control the video communication to be performed with the selected account based on the permission information received from the external device 2 corresponding to the selected account. Here, the external device 2 may be a device such as the user terminal 2 that can identify a user.

3 is a block diagram showing a configuration of a display device 1 according to an embodiment of the present invention. The display device 1 according to an embodiment of the present invention may include the configuration of FIG. 2 and may further include an image receiving unit 130, an image processing unit 140, a user input unit 150, a storage unit 160, And may include an image pickup unit 170.

The image receiving unit 130 may receive the image signal / image data by wire or wireless, and may transmit the image signal / image data to the image processing unit 140. The image receiving unit 130 receives a broadcast signal from a broadcast signal transmitting apparatus (not shown) such as a TV broadcast signal as a video signal, receives a video signal from a video apparatus such as a DVD player or a BD player, Receive a video signal from a mobile device such as a smart phone or a smart pad, receive a video signal through a network such as the Internet, or input video content stored in a storage medium such as a USB storage medium as a video signal . In another embodiment, the video signal may not be received through the image receiving unit 130, but may be stored in the storage unit 160 and provided. The image receiving unit 130 may be provided in various ways corresponding to the standard of the received image signal and the implementation form of the display device 1. [ For example, the image receiving unit 130 may receive a radio frequency (RF) signal, or may be a composite video, a component video, a super video, a SCART, a high definition multimedia interface (HDMI) A display port, a unified display interface (UDI), or a wireless HD standard. When the video signal is a broadcast signal, the video receiver 130 may include a tuner for tuning the broadcast signal on a channel-by-channel basis.

The type of the image processing process performed by the image processing unit 140 is not limited. For example, the image processing unit 140 may perform de-multiplexing for distributing a predetermined signal to each characteristic signal, decoding corresponding to the image format of the image signal, De-interlacing for converting an interlaced video signal into a progressive mode, noise reduction for improving image quality, detail enhancement, frame refresh rate (frame refresh rate) (not shown) for decoding a source image corresponding to an image format of an encoded source image, and a frame buffer (not shown) for storing a decoded source image on a frame basis can do.

The image processor 140 may be a system-on-chip (SOC) or a separate configuration capable of independently performing each of these processes, which are mounted on a printed circuit board (not shown) And can be embodied in the display device 1.

The image processing unit 140 performs various image processing processes for a source image including a broadcast signal including a video signal received from a receiving unit (not shown) and a video signal supplied from a video source (not shown). The image processor 140 outputs the processed image signal to the display device 1 so that the processed source image can be displayed on the display device 1.

The user input unit 150 can transmit various preset control commands or information to the control unit 100 according to a user's operation and input. The user input unit 150 may be realized by a menu key or an input panel installed outside the display device 1 or a remote controller separated from the display device 1 . Alternatively, the user input unit 150 may be integrated with the display unit 120, and when the display unit 120 is a touch-screen, the user may select an input menu (Not shown) to the control unit 100 by touching the predetermined command.

The user input unit 150 may receive the user's motion and voice. The user's motion may include a touch input. The user input unit 150 may directly receive the user's motion and voice, or may receive information about the user's motion and voice from the external device 2. [

The storage unit 160 is preferably provided with a writable nonvolatile memory (Writable ROM) so that data may remain in the display device 1 even if the power is turned off, and the change of the user data may be reflected. That is, the storage unit 160 may be a flash memory, an EPROM, or an EEPROM.

The imaging unit 170 may be provided with a camera. And may be provided to capture a user located at the front of the display unit 120.

The control unit 100 may select any one of the displayed accounts according to the account selection information received from the external device 2. [ Since the external device 2 can be the user terminal 2 and the user terminal 2 can function as the remote control 3, it is possible to display one of the account information displayed on the display unit 120 of the display device 1 You can choose.

The control unit 100 may request permission to use the account selected by the external device 2 corresponding to the selected account and control permission to receive the permission information from the external device 2. [ For example, if the account is displayed with the name of the user, and the name of the user is selected, the control unit 100 transmits a permission request message indicating whether the account can be used by the user terminal 2 of the user. In response to the transmitted permission request message, the control unit 100 may transmit a response to the display device 1 to allow the user terminal 2 to use the account, so that the display device 1 can receive the permission information .

The control unit 100 displays the identification information of the external device 2 and receives the user's input of the information of the account corresponding to the external device 2 of the identification information displayed based on the input of the received user have.

The control unit 100 displays an external device 2 connectable to the communication unit 110 and receives information of a user and registers information of an account corresponding to the displayed external device 2. [ For example, the control unit 100 may search for a connectable external device 2 located within a predetermined distance, such as Bluetooth, to display the external device 2, and may include selecting the displayed external device 2 The user's input can be received and the information of the account can be registered.

When the application is executed, the control unit 100 can grasp the identification information of the external device 2 connectable to the communication unit 110 and control the display of the registered account information corresponding to the identification information.

The control unit 100 may transmit the identification information of the external device 2 to the external server 5 corresponding to the application and control the information of the account to be displayed based on the information received from the external server 5. [ The control unit 100 may store the identification information of the external device 2 when registering the information of the account and when receiving the permission information from the user terminal 2, Can be transmitted. The external server 5 can receive the identification information from the external device 2, log in the corresponding account, and transmit the information of the account logged in to the external device 2 so as to make a video call.

The control unit 100 may stop displaying the account information when the external device 2 is disconnected from the communication unit 110. [ The display device 1 displays information of the account only when the user and the user terminal 2 exist within a predetermined distance such as Bluetooth for security of the account, and if the user is away from the Bluetooth within a predetermined distance, Can be controlled so as not to be displayed.

The control unit 100 can transmit a control command to the external device 2 to allow the external device 2 to execute an application for video call and log in as an account. The control unit 100 can control the display device 1 to be synchronized with the external device 2. [ So that video communication can be performed simultaneously using the display device 1 and the user terminal 2 as the external device 2. [ When a video call is started with one of the display device 1 and the user terminal 2 by using the display device 1 to log in with account information and log in with the same account information to the user terminal 2, It is possible to participate in a video call using both the display device 1 and the user terminal 2. [

4 is a control flowchart showing the operation of the display apparatus 1 according to the present invention.

The control unit 100 executes an application for video communication displayed on the display unit 120 of the display device 1 at the user's selection (S11).

The control unit 100 displays information of an account related to a video call of the user corresponding to at least one external device 2 connectable to the display device 1 (S12).

One of the displayed accounts is selected by the user (S13).

The control unit 100 receives permission information from the external device 2 corresponding to the selected account (S14).

The control unit 100 controls the video communication to be performed with the selected account based on the received permission information (S15).

5 is a control flowchart showing the operation of the display device 1 according to the embodiment of the present invention.

The control unit 100 executes an application for video communication displayed on the display unit 120 of the display device 1 at the user's selection (S21).

The control unit 100 grasps and displays the identification information of at least one external device 2 connectable to the display device 1 (S22).

The control unit 100 registers the information of the account corresponding to the external device 2 of the identification information displayed based on the input of the user (S23).

The control unit 100 controls the display unit 120 to display the account information related to the video call of the user corresponding to the identification information of the external device 2 (S24). If you are registered as a name or something else, it will show your name or something else.

The control unit 100 selects one of the displayed accounts according to the account selection information received from the external device 2 (S25). Since the external device 2 can function as the remote control 3, the external device 2 can select an account desired by the user.

The control unit 100 requests permission to use the account selected as the external device 2 corresponding to the selected account (S26). A message can be transmitted and an answer can be selected or ignored. In the case of disregarding, permission information is not transmitted from the external device 2 to the display device 1 without being permitted. When the permission is selected, the external device 2 transmits the permission information to the display device 1.

The control unit 100 receives permission information from the external device 2 corresponding to the selected account (S27).

Upon receiving the permission information, the control unit 100 transmits the registered identification information of the external device 2 to the external server 5 corresponding to the application (S28). Here, when registering the account, information that can be logged into the account may be transmitted to the external server 5.

The external server 5 logs into the account using the identification information or login information of the external device 2 received from the control unit 100 and transmits the information of the logged in account to the display device 1. [

Then, the control unit 100 displays the account information based on the information received from the external server 5 (S29).

The control unit 100 may select an account for which a video call is desired from the information of the displayed account and perform a video call (S30).

FIG. 6 is a diagram illustrating a process of making a video call in the display device 1 according to an embodiment of the present invention. Fig. 6 shows that the user is viewed by the operation of the display device 1 in Fig.

①  After turning on the display device 1, the user executes an application for video communication. Among the accounts registered in advance, the accounts corresponding to the user terminal 2 connectable with the display device 1 are displayed.

② It is shown that a message requesting permission to use the user account is transmitted to the user terminal 2 corresponding to the user account. The user touches the permission button displayed on the user terminal 2 corresponding to the account of Lee, and the user terminal 2 transmits the permission information to the display device 1. [

③ The display device 1 logs into the account using the received permission information, and the information of the account is received from the external server 5 and displayed.

7 is an exemplary diagram illustrating operations with the display device 1, the user terminal 2, and the external server 5 according to an embodiment of the present invention.

Since the operation has been described with reference to Figs. 4 to 6, the relationship between the apparatuses will be described with reference to Fig.

The user uses AP (Access Point, 4) which can use Wi-Fi in the home, and the area where communication connection is possible by Wi-Fi is indicated by A When the display device 1 recognizes that the user terminal 2 is located in the area A, the area A displays an account corresponding to the previously registered user terminal 2 when the application for video communication is executed It is a divided area.

① Indicates that the message requesting permission to use the account is transmitted from the display device 1 to the user terminal 2. [ It also indicates that a control command for logging into the account is transmitted to the user terminal 2. [ Then, it indicates that the display device 1 and the user terminal 2 are transmitting signals to be synchronized.

② Indicates that the account selection information is transmitted to the display device 1. It also indicates that the permission information is transmitted to the display device 1. Then, it indicates that the display device 1 and the user terminal 2 are transmitting signals to be synchronized.

③ Indicates that the account selection information is transmitted to the display device 1 by using the remote controller 3. [

④ Represents the transfer of identification information or login information of the user terminal 2 to the external server 5. Also, when a video call is made, a related signal is transmitted.

⑤ The user terminal 2 logs in to the account using the identification information or the login information and transmits the information of the account to the display device 1. [ Also, when a video call is made, a related signal is transmitted.

⑥ Indicates that the identification information or the login information of the user terminal 2 is transmitted to the external server 5. Also, when a video call is made, a related signal is transmitted.

⑦ Indicates that the identification information or the login information of the user terminal 2 is transmitted to the external server 5. Also, when a video call is made, a related signal is transmitted.

8 is an exemplary diagram showing the display of the information of the account is stopped in the display device 1 according to another embodiment of the present invention.

The user uses AP (Access Point, 4) which can use Wi-Fi in the home, and the area where communication connection is possible by Wi-Fi is indicated by A When the display device 1 recognizes that the user terminal 2 is located in the area A, the area A displays an account corresponding to the previously registered user terminal 2 when the application for video communication is executed It is a divided area.

When three users with user terminals 2-1, 2-2 and 2-3 are located in the area A, the corresponding user terminals 2-1, 2-2 and 2-3 Account (Lee Ho Jin, Chung Ik Sung, Sim Yeon Sup). Thereafter, it is indicated that the user terminal 2 is out of the area A and the user terminal 2-3 of the display device 1 and the user terminal 2 is not displayed on the display device 1. By providing a video call only when the user is located in the vicinity of the display device 1, it is possible to prevent the use of his or her account by others.

Fig. 9 is an exemplary view showing registration of an account for the user terminal 2 in the display device 1 according to another embodiment of the present invention.

The application for the image of the display device 1 is executed and the account is registered in advance so that the account can be displayed. The user uses an AP (Access Point, 4) that can use Wi-Fi in the home, and the area where the communication connection is possible with Wi-Fi is indicated as area A.

When the user terminal 2 possessed by the user communicates with the display device 1, that is, in the area A, when the application for the image is executed, the display device 1 displays the user The terminals 2-1, 2-2 and 2-3 can be displayed by the searched external apparatuses 2-1, 2-2 and 2-3. 2-2 and 2-3 indicated by the external devices 2-1, 2-2 and 2-3 thus searched, the user terminal 2-1, 2-2, 2-3), and may register the login information as information of the account so as to correspond to the user terminals 2-1, 2-2, 2-3. When the registered user terminals 2-1, 2-2, and 2-3 are located in the area A while the application for the image is being executed and the communication with the display device 1 is established, the display device 1 displays It is shown that the user terminals 2-1, 2-2, and 2-3 can be displayed as a registered name (Lee Hojin, Chung Ik-sung, Sim Yeon-Seop)

Due to the above-described display device 1, it is possible to log into the account using the user terminal 2 and easily make a video call with the common display device 1. Also, when the user carries the user terminal 2, In the case of communication connection with the display device 1, it is possible to easily use a video call, and after the video call is used, the display of account information can be blocked so that the security problem can be solved.

While the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope or spirit of this invention. Accordingly, the scope of the present invention should not be construed as being limited to the embodiments described so far, but rather by the appended claims and their equivalents.

1: display device 2: external device (user terminal
3: Remote control 4: AP (Access Point)
5: external server 100:
110: communication unit 120: display unit
130: image receiving unit 140: image processing unit
150: user input unit 160:
170:

Claims (20)

In the display device,
A communication unit connectable to an external device;
A display unit for displaying an image of an application for video communication;
Displaying the account information on the video call of the user corresponding to at least one external device connectable to the communication unit, and when any one of the displayed accounts is selected, And a controller for controlling the video call to be performed on the selected account based on the permission information received from the external apparatus. The method according to claim 1,
Wherein the control unit selects any one of the displayed accounts according to the account selection information received from the external device. The method according to claim 1,
Wherein the control unit requests the use of the selected account by the external device corresponding to the selected account and controls to receive the permission information from the external device. The method according to claim 1,
Wherein the control unit grasps the identification information of the external device connectable to the communication unit when executing the application and controls the display unit to display the information of the account corresponding to the identification information. 5. The method of claim 4,
Further comprising a user input for receiving user input,
Wherein the control unit displays the identification information of the external device and registers the information of the account corresponding to the external device of the displayed identification information based on the input of the received user. The method according to claim 1,
Further comprising a user input for receiving user input,
Wherein the control unit displays the external device connectable to the communication unit, receives the input of the user, and registers information of the account corresponding to the displayed external device. The method according to claim 1,
Wherein the control unit transmits the identification information of the external device to an external server corresponding to the application and controls to display information of the account based on information received from the external server. The method according to claim 1,
Wherein the control unit stops displaying the information of the account when the external device is disconnected from the communication unit. The method according to claim 1,
Wherein the control unit transmits to the external device a control command for causing the external device to execute an application of the video call and log in to the account. The method according to claim 1,
Wherein the control unit controls the display device to be synchronized with the external device. A method of controlling a display device,
Executing an application for video communication;
Displaying information of an account of the user on the video call corresponding to at least one external device connectable to the communication unit of the display device;
Selecting one of the displayed accounts;
Receiving permission information from the external device corresponding to the selected account;
And controlling the video call to be performed on the selected account based on the received permission information. 12. The method of claim 11,
The step of selecting any one of the above-
And selecting one of the displayed accounts in accordance with the account selection information received from the external device. 12. The method of claim 11,
Wherein the step of receiving the permission information comprises:
And requesting permission to use the selected account with the external device corresponding to the selected account. 12. The method of claim 11,
Wherein the displaying of the information of the account comprises:
Executing identification information of the external device connectable to the communication unit when the application is executed;
And displaying information of the account corresponding to the identification information. 15. The method of claim 14,
The step of grasping the identification information comprises:
Displaying identification information of the external device;
And registering information of an account corresponding to an external device of the displayed identification information based on the input of the received user. 12. The method of claim 11,
Wherein the displaying of the information of the account comprises:
Displaying the external device connectable to the communication unit;
Receiving an input of the user and registering information of an account corresponding to the displayed external device. 12. The method of claim 11,
Wherein the controlling to perform the video call comprises:
Transmitting identification information of the external device to an external server corresponding to the application;
And controlling the display of the information of the account based on the information received from the external server. 12. The method of claim 11,
Wherein the displaying of the information of the account comprises:
And stopping display of information of the account when the external device is disconnected from the display device. 12. The method of claim 11,
Further comprising transmitting to the external device a control command for causing the external device to execute the application of the video call and log in to the account. 12. The method of claim 11,
And controlling the display device to be synchronized with the external device.

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