Patent Publication Number: US-2022214848-A1

Title: Display device, user terminal device, method for controlling display device, and method for controlling user terminal device

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This is a continuation application of U.S. application Ser. No. 16/588,078, filed Sep. 30, 2019, which is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0045703, filed on Apr. 18, 2019, and Korean Patent Application No. 10-2019-0111452, filed on Sep. 9, 2019, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     Apparatuses and methods consistent with the disclosure relate to a display device, a user terminal device, a method for controlling a display device, and a method for controlling a user terminal device, and more particularly, to a method in which a display device outputs content that is being output via a user terminal device. 
     2. Description of Related Art 
     A sound mirroring or screen mirroring technology is a technology of transmitting audio or image content output via a source device to a sync device. Mirroring technology has been used primarily to output content of a device having a relatively smaller screen size, such as a smartphone, to a device having a relatively larger screen size, such as a television (TV), and has been used for various purposes such as meetings and for everyday use. 
     With existing screen minoring technology, however, users might need to perform a process of executing a screen mirroring application of a source device, and selecting a sync device that is to output content of the source device. That is, the users might need to perform multiple processes to implement the screen mirroring technology, which might prove tedious, error-prone, impractical, or the like. 
     Further, with existing minoring technology, an approval process between the source device and the sync device might be required each time that mirroring is requested in order to establish a connection between the sync device and the source device to permit mirroring between the devices. Further, there is a limitation that in a case where different transmission schemes are used according to the particular content to be output, a user might be required to directly select a particular transmission scheme, or the sync device may output content having a predetermined and limited function, because the sync device may not be capable of outputting the content based on a context of the content that is being output via the source device. 
     SUMMARY 
     Embodiments of the disclosure overcome the above disadvantages and other disadvantages not described above. Also, the disclosure is not required to overcome the disadvantages described above, and an embodiment of the disclosure may not overcome any of the problems described above. 
     The disclosure provides a method in which a display device outputs content that is being output via a user terminal device based on an occurrence of an event requesting the content that is being output via the user terminal device being detected by the display device. 
     According to an aspect of the disclosure, a display device includes a communication interface configured to communicate with a user terminal device; a display; a memory configured to store at least one instruction; and a processor configured to execute the at least one instruction to: in response to detecting of a content request event associated with a request for the display device to output information associated with content that is being output via the user terminal device, receive the information associated with the content from the user terminal device via the communication interface; based on the content that is being output via the user terminal device being video content, control the display to display the video content based on information associated with the video content that is received from the user terminal device; and based on the content that is being output via the user terminal device being audio content, control the display to display an audio user interface (UI) that is different than a UI that is concurrently being displayed via the user terminal device, and control the display device to output the audio content, based on information associated with the audio content that is received from the user terminal device. 
     The display device includes a near field communication (NFC) interface having an NFC tag that stores information associated with the display device and connection information, wherein the content request event is an event in which the user terminal device is brought within communicative proximity of the NFC tag of the display device, and the connection information includes information associated with a connection method by which the information associated with the content that is output via the user terminal device is receivable. 
     The processor may receive a wake-up signal via the NFC interface and enter a standby mode in which a predetermined standby screen is displayed via the display, based on the user terminal device being brought within communicative proximity of the display device while the display device is in a powered-off state; and control the display to display the audio UI via the standby screen based on the audio content being received from the user terminal device. 
     The processor may control the display to display an indicator indicating that the user terminal device is within communicative proximity of the display device, on a region corresponding to a position where the user terminal device is within communicative proximity of the display device, based on entering the standby mode. 
     The processor may, based on the content that is being output via the user terminal device being video content, switch a mode of the display device from the standby mode to a normal mode; and control the display to display the video content and an indicator indicating that the information associated with the video content is received from the user terminal device. 
     The processor may based on the content that is being output via the user terminal device being video content received from an external server, receive, from the external server via the communication interface, a portion of the video content that corresponds to a current playback point of the video content that is being output via the user terminal device; and control the display to display the portion of the video content based on the information associated with the video content that includes information identifying a title of the video content, and the current playback point of the video content that is being output via the user terminal device. 
     The content request event may be an event in which the user terminal device is brought within communicative proximity an external device connected to the display device. 
     According to an aspect of the disclosure, a user terminal device includes a display; a communication interface configured to communicate with a display device; a memory configured to store at least one instruction; and a processor configured to execute the at least one instruction to: receive a signal that requests information associated with content that is being output via the user terminal device from a display device, identify a type of the content that is being output via the user terminal device; and control the communication interface to transmit, to the display device, the information associated with the content that is being output via the user terminal device by using a first communication method based on the content being video content, and by using a second communication method based on the content being audio content. 
     The processor may, based on the content being the audio content, control the communication interface to transmit information associated with the audio content by using the second communication method of Bluetooth communication; and based on the content being the video content, control the communicator to transmit information associated with the video content by using the first communication method of peer-to-peer (P2P) communication. 
     The processor may, based on receiving, from the display device, the signal that requests the information associated with the content that is being output via the user terminal device, control the display to display a user interface (UI) for selecting information associated with content to be transmitted to the display device; and based on the information associated with the content being selected via the UI, control the communication interface to transmit the selected information associated with the content to the display device. 
     According to an aspect of the disclosure, a method for controlling a display device may include receiving, in response to detecting a content request event associated with a request for the display device to output information associated with content that is being output via a user terminal device, the information associated with the content from the user terminal device; displaying, based on the content that is being output via the user terminal device being video content, the video content based on information associated with the video content that is received from the user terminal device; and displaying, based on the content that is being output via the user terminal device being audio content, an audio user interface (UI) that is different than a UI that is concurrently being displayed via the user terminal device, and outputting the audio content, based on information associated with the audio content that is received from the user terminal device. 
     The content request event may be an event in which the user terminal device is brought within communicative proximity of a near field communication (NFC) tag of the display device. 
     The displaying of the audio UI may include receiving a wake-up signal and entering a standby mode in which a predetermined standby screen is provided, based on the user terminal device being brought within communicative proximity of the display device while the display device is in a powered-off state; and displaying the audio UI via the standby screen based on the audio content being received from the user terminal device. 
     The entering of the standby mode may include displaying an indicator indicating that the user terminal device is within communicative proximity of the display device, on a region corresponding to a position where the user terminal device is within communicative proximity of the display device, based on entering the standby mode. 
     The displaying of the video content may include, based on the information associated with the video content being received from the user terminal device, switching a mode of the display device from the standby mode to a normal mode; and displaying the video content and an indicator indicating that the information associated with the video content is received from the user terminal device. 
     The displaying of the video content may include receiving, based on the content that is being output via the user terminal device being video content received from an external server, a portion of the video content corresponding to a current playback point of the video content that is being output via the user terminal device, from the external server based on information associated with the video content including information identifying a title of the video content, and the current playback point of the video content that is being output via the user terminal device. 
     The content request event may be an event in which the user terminal device is brought within communicative proximity of an external device connected to the display device. 
     According to an aspect of the disclosure, a method for controlling a user terminal device may include identifying a type of content that is being output via the user terminal device, based on receiving a signal that requests information associated with the content that is being output via the user terminal device from a display device; and transmitting, to the display device, the information associated with the content that is being output via the user terminal device using a first communication method based on the content being video content, and using a second communication method based on the content being audio content. 
     The transmitting may include transmitting, based on the content being the audio content, information associated with the audio content by using the second communication method of Bluetooth communication; and transmitting, based on the content being the video content, information associated with the video content by using the first communication method of peer-to-peer (P2P) communication. 
     The transmitting may include displaying a user interface (UI) for selecting information associated with content to be transmitted to the display device, based on receiving the signal that requests information associated with the content that is being output via the user terminal device from the display device; and transmitting, based on the information associated with the content being selected via the UI, the selected information associated with the content to the display device. 
     As described above, according to embodiments of the disclosure, once the display device receives the content request event, the display device outputs the content that is being concurrently output via the user terminal device, such that the user may efficiently utilize the mirroring function. 
     Additional and/or other aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, may be obvious from the description, or may be learned by practice of the disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain embodiments of the present disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIGS. 1A and 1B  are views for describing a method for controlling a display device and a method for controlling a user terminal device according to an embodiment; 
         FIG. 2A  is a block diagram schematically illustrating a configuration of the display device according to an embodiment; 
         FIG. 2B  is a block diagram illustrating a configuration of the display device according to an embodiment; 
         FIG. 3  is a block diagram schematically illustrating a configuration of the user terminal device according to an embodiment; 
         FIG. 4  is a sequence diagram illustrating a process in which the display device outputs content that is being output via the user terminal device according to an embodiment; 
         FIG. 5A  is a view for describing the powered-off display device according to an embodiment; 
         FIG. 5B  is a view for describing a process in which the user terminal device on which video content is being output is tagged to the powered-off display device according to an embodiment; 
         FIG. 5C  is a view for describing a process in which the display device displays video content received from the user terminal device according to an embodiment; 
         FIG. 6A  is a view for describing a process in which the user terminal device via which audio content is being output is tagged to the display device according to an embodiment; 
         FIG. 6B  is a view for describing a process in which the display device outputs audio content received from the user terminal device according to an embodiment; 
         FIG. 7  is a view for describing a process in which the display device receives content from an external server and the user terminal device according to an embodiment; 
         FIG. 8A  is a view for describing a process in which the user terminal device is tagged to an external device connected with the display device according to an embodiment; 
         FIG. 8B  is a view for describing a process in which the display device outputs audio content received from the user terminal device according to an embodiment; 
         FIG. 9  is a view for describing a process in which the user terminal device is tagged to a near field communication (NFC) tag external to the display device according to an embodiment; 
         FIG. 10  is a view for describing a process in which the user terminal device is tagged to an NFC tag external to the display device, according to an embodiment of the disclosure; 
         FIG. 11  is a view for describing a process in which the user terminal device is tagged to an NFC tag external to the display device according to an embodiment; 
         FIG. 12  is a view for describing a case where the display device is implemented by a speaker according to an embodiment; 
         FIGS. 13A to 13C  are views for describing processes in which a connection between the display device and the user terminal device is terminated according to an embodiment; 
         FIG. 14  is a view for describing a user interface (UI) for selecting content to be transmitted from the user terminal device to the display device according to an embodiment; 
         FIGS. 15A and 15B  are views for describing a process in which the display device determines whether to rotate a display according to an embodiment; 
         FIG. 16  is a flowchart for describing a method for controlling a display device according to an embodiment; and 
         FIG. 17  is a flowchart for describing a method for controlling a user terminal device according to an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Since the disclosure may be variously modified and have several embodiments, specific embodiments of the disclosure may be illustrated in the drawings and may be described in detail in the detailed description. However, it is to be understood that technologies mentioned in the disclosure are not limited to specific embodiments, and may include all modifications, equivalents, and substitutions according to embodiments of the disclosure. Throughout the accompanying drawings, similar components may be denoted by similar reference numerals. 
     In addition, the following embodiments may be modified in several different forms, and the scope and spirit of the disclosure are not limited to the following embodiments. Rather, these embodiments make the disclosure thorough and complete, and are provided to completely transfer the spirit of the disclosure to those skilled in the art. 
     Terms used in the disclosure may be used to describe specific embodiments rather than limiting the scope of the disclosure. Singular forms of terms may include the plural forms of the terms unless the context clearly indicates otherwise. 
     In the disclosure, expressions such as “have,” “may have,” “include,” “may include,” or the like, may indicate the existence of a corresponding feature (e.g., a numerical value, a function, an operation, or a component such as a part), and might not exclude the existence of an additional feature. 
     In the disclosure, expressions such as “A or B,” “at least one of A and/or B,” “one or more of A and/or B,” or the like, may include all possible combinations of items enumerated together. For example, “A or B,” “at least one of A and B,” or “at least one of A or B,” may include all of: 1) a case in which at least one A is included, 2) a case in which at least one B is included, or 3) a case in which both of at least one A and at least one B are included. 
     Expressions such as “first,” “second,” or the like, used in the disclosure may indicate various components regardless of a sequence and/or importance of the components, and may be used in order to distinguish one component from the other components, and might not limit the corresponding components. 
     When it is mentioned that a component (e.g., a first component) is (operatively or communicatively) coupled with/to or is connected to another component (e.g., a second component), the component may be directly coupled to another component or may be coupled to another component via the other component (e.g., a third component). Moreover, when it is mentioned that any component (e.g., a first component) is “directly coupled” or “directly connected” to another component (e.g., a second component), an intermediate component (e.g., a third component) might not be present between the component and the other component. 
     Expressions such as “configured (or set) to” used in the disclosure may be interchangeable with expressions such as “suitable for,” “having the capacity to,” “designed to,” “adapted to,” “made to,” or “capable of” depending on the context. The expression “configured (or set) to” may not necessarily mean “specifically designed to” in hardware. 
     Instead, the expression “a device configured to” may indicate that the device may “perform” an operation together with other devices or components. For example, a “processor configured (or set) to perform A, B, and C” may indicate a dedicated processor (e.g., an embedded processor) for performing the corresponding operations or a generic-purpose processor (e.g., a central processing unit (CPU) or an application processor) that may perform the corresponding operations by executing one or more software programs stored in a memory device. 
     The terms “module” or a “[function]er/or” may be configured to perform at least one function or operation, and may be implemented in hardware or software or be implemented in a combination of hardware and software. In addition, a plurality of “modules” or a plurality of “[function]ers/ors” may be integrated in at least one module and be implemented by at least one processor (not illustrated) except for a “module” or a “[function]er/or” that is implemented by specific hardware. 
     Hereinafter, the disclosure will be described in detail with reference to the accompanying drawings. 
       FIGS. 1A and 1B  are views for describing a method for controlling a display device  100  and a method for controlling a user terminal device  200  according to an embodiment. 
     The user terminal device  200  according to an embodiment may include at least one of, for example, a smartphone, a tablet personal computer (PC), a video phone, a desktop PC, a laptop PC, a netbook computer, a personal digital assistant (PDA), a portable multimedia player (PMP), an MP3 player, a mobile medical device, a wearable device, or the like. 
     The wearable device may include at least one of an accessory type wearable device (e.g., a watch, a ring, a bracelet, an anklet, a necklace, glasses, a contact lens, or a head-mounted-device (HMD)), a textile or clothing integral type wearable device (e.g., an electronic clothing), a body attachment type wearable device (e.g., a skin pad or a tattoo), or a living body implantation type wearable device (e.g., an implantable circuit). 
     Although  FIGS. 1A and 1B  illustrate a smartphone as an example of the user terminal device  200 , the disclosure is not limited thereto. 
     As shown in  FIGS. 1A and 1B , based on detecting a content request event associated with a request for the display device  100  to output information associated with content that is being output via the user terminal device  200 , the display device  100  may output the content based on the information associated with the content that is received from the user terminal device  200 . 
     Specifically, the display device  100  may detect the content request event. According to an embodiment of the disclosure, the content request event may be an event in which the user terminal device  200  is brought within communicative proximity of a near field communication (NFC) tag including information associated with the display device  100 . NFC is a short-range wireless communication protocol that may use a frequency range of 13.56 MHz. NFC permits information to be transmitted and received based on terminal devices being brought within communicative proximity (e.g., 10 centimeters). Therefore, based on the user terminal device  200  being brought within communicative proximity of the NFC tag of the display device  100 , the display device  100  may transmit, to the user terminal device  200 , information (e.g., a media access control (MAC) address of the display device  100 ) associated with the display device  100 , and connection information. The connection information may include information associated with a communication method for receiving the information associated with content that is being output via the user terminal device  200 . Specifically, the connection information may include information associated with a communication method by which the display device  100  may receive the information associated with content that is being output via the user terminal device  200 , such as a Bluetooth MAC address or a peer-to-peer (P2P) device address. Therefore, the user terminal device  200  may connect to the display device  100  to transmit information associated with content, based on the received connection information. 
     According to an embodiment, the content request event may be an event in which the user terminal device  200  transmits, to the display device  100 , a signal indicating that the information associated with content that is being output via the user terminal device  200  is to be transmitted. In other words, the content request event may be an event in which the user terminal device  200  transmits a signal indicating that the information associated with content that is currently being output via the user terminal device  200  is to be transmitted to the display device  100  to permit the display device to output the content while the connection is established. 
     According to an embodiment, the content request event may be an event in which an external device connected to the display device  100  transmits, to the user terminal device  200  that may be connected to the display device  100 , a signal for requesting transmission of the information associated with content that is currently being output via the user terminal device  200 . Therefore, based on receiving the signal that requests the transmission of the information associated with content from the external device, the display device  100  may transmit, to the user terminal device  200  that may be connected to the display device  100 , a signal that requests the information associated with content that is currently being output via the user terminal device  200 . 
     Further, based on detecting the content request event, the display device  100  may transmit, to the user terminal device  200 , a signal that requests the information associated with content that is being o the user terminal device  200 . 
     According to an embodiment, the user terminal device  200  may receive the signal that requests the information associated with content that is being output via the user terminal device  200  from the display device  100 , while outputting the content, and the user terminal device  200  may identify a type of content that is currently being output. Further, the user terminal device  200  may transmit the information associated with content that is being output via the user terminal device  200  to the display device  100  by using various and/or different communication methods according to the identified type of content. The user terminal device  200  may utilize connection information received from the display device  100  when transmitting information associated with the identified type of content by using various and/or different communication methods. According to an embodiment, in a case where it is identified that video content is being output by the user terminal device  200 , the user terminal device  200  may transmit information associated with the video content to the display device  100  by using P2P communication (e.g., Wireless Fidelity (Wi-Fi) Direct communication) by utilizing the connection information such as a P2P device MAC address. According to another embodiment, in a case where it is identified that audio content is being output via the user terminal device  200 , the user terminal device  200  may transmit information associated with the audio content to the display device  100  by using Bluetooth communication and utilizing the connection information such as a Bluetooth MAC address. In a case where the user terminal device  200  is brought within communicative proximity of the display device  100  when the display device  100  is in a powered-off state, the display device  100  may receive a wake-up signal from the user terminal device  200  and enter a standby mode in which a predetermined standby screen  30  is provided. According to an embodiment, the display device  100  may display an indicator indicating that the user terminal device  200  is within communicative proximity of the display device  100  on a region of the standby screen  30 , and the region may correspond to a position where the user terminal device  200  is within communicative proximity. A detailed description thereof will be provided below in more detail with reference to  FIG. 5B . 
     Further, as shown in  FIG. 1A , in a case where content that is being output via the user terminal device  200  is video content, the display device  100  may be switched from the standby mode to a normal mode, and display the video content and an indicator  20  indicating that information associated with video content is received, based on the information (e.g., orientation information of the video content, a title of the video content, information associated with a current playback point of the video content that is being output via the user terminal device, and a connection method for receiving the video content) associated with the video content. The indicator  20  indicating that information associated with video content is received is shown as a play button in  FIG. 1A . However, the indicator  20  may be variously implemented in a form such as a thumbnail icon of the video content, or the like. 
     Further, as shown in  FIG. 1B , in a case where content that is being output via the user terminal device  200  is audio content, the display device  100  may display audio user interfaces (UIs)  40 - 1 ,  40 - 2 , and  40 - 3  that are different than a UI that is concurrently being displayed via the user terminal device  200 , while outputting the received audio content. According to an embodiment, the display device  100  may receive information (e.g., an audio data packet, a title of the audio content, a playlist, a playback point, and the like) associated with audio content from the user terminal device  200 . The display device  100  may output the audio content based on the received audio data packet. Further, the display device  100  may display the audio UI  40 - 1 , the audio UI  40 - 2 , and the audio UI  40 - 3  on the standby screen  30 . The audio UI  40 - 1  may be generated based on the title of the audio content, the playback point, and the like, the audio UI  40 - 2  may be generated based on an image (e.g., an album image of audio data) relevant to the audio content that is being played, the playback point, and the like, and the audio UI  40 - 3  may be generated based on a play history of recently played audio content. As such, the display device  100  may output the audio content while displaying, on the standby screen  30 , the audio UIs  40 - 1 ,  40 - 2 , and  40 - 3  that are different than the UI that is concurrently displayed on the user terminal device  200 . 
     The content request event may be an event in which the user terminal device  200  is brought within communicative proximity of an external device connected to the display device  100 . That is, the display device  100  may output content that is being output via the user terminal device  200  based on the user terminal device  200  being brought within communicative proximity of the external device (e.g., a remote controller controlling the display device  100 , and an artificial intelligence (AI) speaker connected to the display device  100 ) connected to the display device  100 , rather than being directly brought within communicative proximity of the NFC tag of the display device  100 . A detailed description thereof will be provided below in more detail with reference to  FIGS. 8A, and 9 to 11 . 
       FIG. 2A  is a block diagram schematically illustrating a configuration of the display device  100  according to an embodiment. 
     As illustrated in  FIG. 2 , the display device  100  may include a communication interface  110 , a display  120 , a memory  130 , and a processor  140 . 
     The communication interface  110  may be configured to communicate with the user terminal device  200  by various methods. The communication between the communication interface  110  and the user terminal device  200  may be facilitated via a connection via a third device (e.g., a relay, a hub, an access point, a server, a gateway, or the like). 
     The communication interface  110  may include various communication modules to connect to the user terminal device  200 . A detailed description of the various communication modules is provided below with reference to  FIG. 2B . 
     The display  120  may display various information based on a control by the processor  140 . Specifically, based on a wake-up signal being received via the communication interface  110 , the display  120  may display a predetermined standby screen based on the control by the processor  140 . Further, the display  120  may display, on a region of the standby screen, an indicator indicating that the user terminal device  200  is within communicative proximity of the display device  100 , and the region may correspond to a position where the user terminal device  200  is within communicative proximity, according to a control by the processor  140 . 
     According to an embodiment, the display  120  may display video content received from the user terminal device  200  based on a control by the processor  140 . Further, the display  120  may display an audio UI that is different than a UI that is concurrently being displayed via the user terminal device  200  based on a control by the processor  140 . 
     Further, the display  120  may be implemented by a touch screen in combination with a touch panel, or may be implemented in various forms. 
     Further, a panel of the display  120  may be implemented by various display technologies such as a liquid crystal display (LCD) technology, an organic light emitting diode (OLED) technology, an active-matrix organic light emitting diode (AM-OLED) technology, a liquid crystal on silicon (LcoS) technology, a quantum dot light emitting diode (QLED) technology, and a digital light processing (DLP) technology. Further, the display  120  may be in a form of a flexible display and may be connected in at least one of a front surface region, a side surface region, or a back surface region of the display device  100 . 
     The memory  130  may store instructions or data that may be utilized by at least another component of the display device  100 . In particular, the memory  130  may be implemented by a non-volatile memory, a volatile memory, a flash memory, a hard disk drive (HDD), a solid state drive (SDD), or the like. The memory  130  is accessed by the processor  140 , and various operations such as readout, recording, correction, deletion, update, and the like, of data in the memory  130  may be performed by the processor  140 . In the disclosure, the term “memory” includes the memory  130 , a read only memory (ROM) (not illustrated) in the processor  140 , a random access memory (RAM) (not illustrated), or a memory card (not illustrated) (e.g., a micro secure digital (SD) card or a memory stick) mounted in the display device  100 . Further, the memory  130  may store a program, data, or the like, for configuring various screens to be displayed on a display region of the display  120 . 
     Further, the memory  130  may store information associated with the user terminal device  200 , and information associated with content that is received from the user terminal device  200 . For example, the memory  130  may store information associated with the user terminal device  200 , such as an Internet protocol (IP) address of the user terminal device  200 , a network environment, security settings, and connection history. Further, the memory  130  may store a title, a type, a history, and the like, of the content received form the user terminal device  200 . 
     The processor  140  may be electrically connected to the memory  130  to control the overall operation and function of the display device  100 . In particular, based on detecting the content request event, the processor  140  may control the communication interface  110  to transmit, to the user terminal device  200 , a signal that requests the information associated with content that is being output via the user terminal device  200 . According to an embodiment, and in a case where the content request event is an event in which the user terminal device  200  is brought within communicative proximity of the NFC tag of the display device  100 , the processor  140  may receive the wake-up signal via an NFC communication interface  150  and enter the standby mode in which the predetermined standby screen is provided. After entering the standby mode, the processor  140  may control the display  120  to display, on the region corresponding to a position where the user terminal device  200  is within communicative proximity, the indicator indicating that the user terminal device  200  is within communicative proximity. According to an embodiment, and in a case where the user terminal device  200  is brought within communicative proximity of the right side of the display device  100 , the processor  140  may control the display  120  to display the indicator indicating that the user terminal device  200  is within communicative proximity, on a right side region of the display  120 . 
     In a case where information associated with video content is received from the user terminal device  200 , the processor  140  may switch a mode of the display device  100  from the standby mode to the normal mode. Then, the processor  140  may control the display  120  to display the video content and the indicator indicating that the information associated with the video content was received, based on the information associated with the video content that is received from the user terminal device  200 , in the normal mode. The indicator indicating that the information regarding the video content was received may be an indicator having a play button shape as shown in  FIG. 1A . Alternatively, the indicator indicating that the information regarding the video content was received may also be a thumbnail icon of the received video content. 
     Further, in a case where information associated with audio content is received from the user terminal device  200 , the processor  140  may control an audio output component  170  to output the audio content based on the information associated with the audio content, and may control the display  120  to display, on the standby screen, an audio UI that is different from a UI that is concurrently being displayed on the user terminal device  200 . Specifically, the processor  140  may identify an audio UI based on information (e.g., a title of the audio content, a playback point, a playlist, or the like) associated with audio content that is received from the user terminal device  200 , and control the display  120  to display the identified audio UI. 
     Meanwhile, in a case where the content that is being output via the user terminal device  200  is video content received from an external server  700 , the processor  140  may receive information associated with the video content from the user terminal device  200  via the communication interface  110 . The information associated with the video content may include a title of the video content that is being output via the user terminal device  200 , and a current playback point of the video content that is being output via the user terminal device  200 . Then, the processor  140  may receive, from the external server  700  via the communication interface  110 , video content that corresponds to a timeframe after the playback point of the video content that is being output via the user terminal device  200 , based on the information associated with the video content. 
     The processor  140  may store information (e.g., an IP address of the user terminal device  200 , a network environment, security settings, and user information of the user terminal device  200 ) associated with the user terminal device  200  that is received from the user terminal device  200 , a type and a history of content received from the user terminal device  200 , in the memory  130 . Further, the processor  140  may control the display  120  to display the indicator indicating that the user terminal device  200  is within communicative proximity, based on the stored information associated with the user terminal device  200 . Further, the processor  140  may control the display  120  to display a UI including the stored type and history of content received from the user terminal device  200  on the standby screen or a screen in the normal mode. 
       FIG. 2B  is a block diagram illustrating a configuration of the display device  100  according to an embodiment. As illustrated in  FIG. 2B , the display device  100  may include to communication interface  110 , a display  120 , a memory  130 , a processor  140 , an NFC communication interface  150 , an input component  160 , and an audio output component  170 . The communication interface  110 , the display  120 , the memory  130 , and the processor  140  shown in  FIG. 2B  may be substantially similar to the communication interface  110 , the display  120 , the memory  130 , and the processor  140  as described above with reference to  FIG. 2A . 
     The communication interface  110  may include various modules configured to connect to the user terminal device  200  or the external server  700 . For example, the communication interface  110  may include a Bluetooth module  112 , a P2P module  114 , a wireless communication module  116 , and a broadcast receiving module  118 . 
     The Bluetooth module  112  may be a module that is configured to connect to the user terminal device  200  using a Bluetooth low energy (BLE) protocol. Bluetooth is a wireless communication method using an industrial, scientific, and medical (ISM) frequency range (e.g., 2402 to 2480 MHz). According to an embodiment, the Bluetooth module  112  may receive, from the user terminal device  200 , information associated with audio content output via the user terminal device  200  by using Bluetooth communication. 
     The P2P module  114  may be a module that is configured to connect to the user terminal device  200  by using P2P communication. According to an embodiment, the P2P module  114  may connect to the user terminal device  200  by utilizing Wi-Fi Direct, which is a Wi-Fi-based P2P standard, without requiring access to separate equipment such as an access point (AP) or a router. Further, the P2P module  114  may receive, form the user terminal device  200 , information associated with video content that is being output via the user terminal device  200 . 
     The wireless communication module  116  may include a cellular communication module using at least one of long-term evolution (LTE), LTE Advanced (LTE-A), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications system (UMTS), Wireless Broadband (WiBro), or Global System for Mobile Communications (GSM). As another example, the wireless communication module may include, for example, at least one of Zigbee, magnetic secure transmission, radio frequency (RF), or a body area network (BAN). 
     The broadcasting receiving module  118  may include a terrestrial broadcasting receiving module (not illustrated) including an antenna, a demodulator, an equalizer, and the like, for receiving a terrestrial broadcasting signal, a digital multimedia broadcasting (DMB) module for receiving and processing a DMB broadcasting signal, or the like. 
     The NFC communication interface  150  may include an NFC tag in which information (e.g., a MAC address of the display device  100 ) associated with the display device  100 , and connection information (e.g., a Bluetooth MAC address, a P2P device MAC address, and the like) are stored. The NFC tag may include an integrated circuit (IC) and an antenna coil. When the user terminal device  200  including an NFC reader is brought within communicative proximity of the NFC tag to perform short distance access, the NFC tag is driven by an electromagnetic wave emitted from the NFC reader, and may transmit, to the user terminal device  200 , an RF signal including information associated with the display device  100  and connection information that is stored in the NFC tag. 
     Specifically, in the antenna coil in the NFC tag, a current may be induced based on the electromagnetic wave emitted from the NFC reader. The induced current may be charged to a capacitor included in the NFC tag. Further, the antenna coil in the NFC tag may be formed by a conductor wound multiple times in a rectangular or circular form. The IC may be driven by the current charged to the capacitor to modulate and encode information recorded in a memory in the IC to generate the RF signal. 
     Further, the NFC communication interface  150  may receive the wake-up signal from the user terminal device  200 . The wake-up signal may be a signal for inducing the display device  100  to enter the standby mode in which the predetermined standby screen is provided, even in a state in which the display device  100  is powered off 
     The input component  160  may receive a user input for controlling the display device  100 . Particularly, the input component  160  may include, for example, a touch panel for receiving a touch gesture, a stylus pen, or the like, and a button for receiving a manipulation by the user. In addition, the input component  160  may be implemented by another input device (e.g., a remote controller  800 , a virtual keyboard, a mouse, a motion input component, or the like). 
     The audio output component  170  may be a component configured to output various alarms or audio messages as well as various audio data on which various processes such as decoding, amplification, noise filtering, and the like, are performed by an audio processor (not illustrated). Particularly, the audio output component  170  may output a response to user speech as an audio message in a form of a natural language. The audio output component  170  may be implemented by a speaker, or by an output terminal that may output audio data. 
     Particularly, according to an embodiment, the audio output component  170  may output audio content received from the user terminal device  200  based on a control by the processor  140 . 
     The processor  140  may include one or more of a central processing unit (CPU) configured to process a digital signal, a microcontroller unit (MCU), a micro processing unit (MPU), a controller, an application processor (AP), a communication processor (CP), an ARM processor, or the like. In addition, the processor  140  may be implemented by a system-on-chip (SoC) or a large scale integration (LSI) in which a processing algorithm is embedded, or may be implemented in a field programmable gate array (FPGA) form. The processor  140  may perform various functions by executing computer executable instructions stored in the memory  130 . In addition, the processor  140  may include at least one of a graphics processing unit (GPU), a neural processing unit (NPU), or a visual processing unit (VPU) as a separate artificial intelligence (AI) dedicated processor configured to perform an AI function. 
       FIG. 3  is a block diagram schematically illustrating a configuration of the user terminal device  200  according to an embodiment of the disclosure. 
     As shown in  FIG. 3 , the user terminal device  200  according to an embodiment may include a communication interface  210 , a display  220 , a memory  230 , and a processor  240 . 
     The communication interface  210  may be configured to communicate with the display device  100 , and the external device  800  connected with the display device  100 . Specifically, the communication interface  210  may include an NFC module, and the NFC module may be implemented by an NFC reader. When the user terminal device  200  including the NFC reader is brought within communicative proximity of the NFC tag in which information regarding the display device  100  is stored to perform short distance access, an electromagnetic wave may be emitted from the NFC reader. Further, the NFC tag of the display device  100  is driven by the emitted electromagnetic wave and may transmit an RF signal including the information regarding the display device  100  to the NFC reader. In this way, the communication interface  210  may receive the information associated with the display device  100  and connection information from the display device  100 . The connection information may include information associated with a communication method by which the display device  100  may receive the information associated with the content that is being output via the user terminal device  200 , such as a Bluetooth MAC address or a peer-to-peer (P2P) device address. 
     Further, the communication interface  210  may include at least one of a Wi-Fi chip, a Bluetooth chip, a P2P chip, or a wireless communication chip. Specifically, the Wi-Fi chip, the Bluetooth chip, and the P2P chip may perform Wi-Fi communication, Bluetooth communication, and P2P communication, respectively. Further, the wireless communication chip may be a chip configured to perform communication according to various communication protocols such as Institute of Electrical and Electronics Engineers (IEEE), Zigbee, 3rd generation (3G), 3rd generation partnership project (3GPP), long term evolution (LTE), 5th generation (5G), and the like. Particularly, the communication interface  210  may transmit information associated with audio content to the display device  100  by using Bluetooth communication, and transmit information associated with video content to the display device  100  by using P2P communication. Alternatively, the communication interface  210  may transmit content by using various communication methods. 
     The display  220  may display various information based on a control by the processor  240 . Specifically, based on receiving a signal for requesting information associated with content that is currently being output via the user terminal device  200  from the display device  100 , the display  220  may display a UI for selecting information associated with content to be transmitted to the display device  100  according to a control by the processor  240 . 
     Further, the display  220  may be implemented by a touch screen in combination with a touch panel. Further, a panel of the display  220  may be implemented by various display technologies such as a liquid crystal display (LCD) technology, an organic light emitting diode (OLED) technology, an active-matrix organic light emitting diode (AM-OLED) technology, a liquid crystal on silicon (LcoS) technology, a quantum dot light emitting diode (QLED) technology, and a digital light processing (DLP) technology. Further, the display  220  may be in a form of a flexible display and may be connected in at least one of a front surface region, a side surface region, or a back surface region of the user terminal device  200 . 
     The memory  230  may include at least one instruction related to the user terminal device  200 . The memory  230  may include a semiconductor memory such as a flash memory, or a magnetic storage medium such as a hard disk, or the like. Further, the memory  230  may store various kinds of information such as various kinds of data input, set, or generated during execution of the programs or the applications therein. 
     In addition, the memory  230  may include various software modules for operating the user terminal device  200  according to various embodiments, and the processor  240  may execute the various software modules stored in the memory  230  to perform an operation of the user terminal device  200  according to various embodiments. 
     Further, the memory  230  may store the information associated with the display device  100  and connection information. 
     The processor  240  may be electrically connected to the memory  230  to control overall operation and function of the user terminal device  200 . The processor  240  may be implemented in various forms. For example, the processor  240  may be implemented by at least one of an application specific integrated circuit (ASIC), an embedded processor, a microprocessor, a hardware control logic, a hardware finite state machine (FSM), or a digital signal processor (DSP). 
     In particular, according to an embodiment, based on receiving the content request signal from the display device  100 , the processor  240  may identify a type of the content that is currently being output via the user terminal device  200 . Specifically, the processor  240  may analyze metadata of content that is being output, or the like to identify the type of content. Further, the processor  240  may control the communication interface  210  to transmit information associated with the content that is being output via the user terminal device  200  to the display device  100  by using different communication methods according to the identified type of content. 
     According to an embodiment, in a case where the content that is being currently output is identified as audio content, the processor  240  may control the communication interface  210  to transmit, to the display device  100 , information associated with the audio content that is being output by using Bluetooth communication. Further, in a case where the content that is being currently output is identified as video content, the processor  240  may control the communication interface  210  to transmit, to the display device  100 , information associated with the video content that is being output by using P2P communication. 
     Meanwhile, based on receiving the content request signal f from the display device  100 , the processor  240  may control the display  220  to display the UI for selecting information associated with the content to be transmitted to the display device  100 . Further, based on receiving a selection of information associated with the content via the UI for selecting the information associated with the content to be transmitted to the display device  100 , the processor  240  may control the communication interface  210  to transmit information associated with the selected content to the display device  100 . According to an embodiment, and in a case where information associated with audio data is selected for transmission, the processor  240  may control the communication interface  210  to transmit the information associated with the audio data to the display device  100  by using Bluetooth communication. In a case where information regarding video data is selected for transmission, the processor  240  may control the communication interface  210  to transmit the information associated with the video data to the display device  100  by using P2P communication. 
       FIG. 4  is a sequence diagram illustrating a process in which the display device outputs content that is being output via the user terminal device, according to an embodiment. 
     First, the display device  100  may detect a content request event associated with a request for the display device  100  to output information associated with content that is being output via the user terminal device  200  (S 410 ). According to an embodiment, the content request event may be an event in which the user terminal device  200  is brought within communicative proximity of the NFC tag including information (e.g., a MAC address of the display device) and connection information. Based on the user terminal device  200  being brought within communicative proximity of the NFC tag, the user terminal device  200  may receive the information associated with the display device  100  that is stored in the NFC tag, and transmit the wake-up signal to the display device  100  (S 420 ). Based on receiving the wake-up signal, the display device  100  may enter the standby mode in which the predetermined standby screen is provided, even when the display device  100  is powered off (S 430 ). Specifically, based on entering the standby mode, the display device  100  may display, on a region corresponding to a position where the user terminal device  200  is within communicative proximity, the indicator indicating that the user terminal device is within communicative proximity. 
     The display device  100  may transmit, to the user terminal device  200 , the signal for requesting information associated with content that is being output via the user terminal device  200  (S 440 ). Based on receiving the signal for requesting information associated with content that is being output via the user terminal device  200 , the user terminal device  200  may identify a type of the content that is being output (S 450 ). Specifically, the user terminal device  200  may analyze metadata of the content that is being output to identify whether the type of content is audio data or video data. 
     Further, the user terminal device  200  may transmit the information associated with the content by using different communication methods based on the identified type of content (S 460 ). Specifically, the user terminal device  200  may utilize connection information received from the display device  100  when transmitting the information associated with the content by using the different communication methods. According to an embodiment, and in a case where the content is identified as audio content, the user terminal device  200  may transmit information associated with the audio content to the display device  100  by using Bluetooth communication. Further, and in a case where the content is identified as video content, the user terminal device  200  may transmit information regarding the video content to the display device  100  by using P2P communication. 
     The display device  100  may output the content in a manner according to the type of content, based on the received information regarding the content (S 470 ). Specifically, in a case where the content that is being output via the user terminal device  200  is audio content, the display device  100  may display an audio UI that is different than a UI that is concurrently being displayed on the user terminal device  200  while outputting the audio content, based on received information associated with the audio content. alternatively, and in a case where the content that is being output via the user terminal device  200  is video content, the display device  100  may be switched from the standby mode to the normal mode, and display the video content and the indicator indicating that information associated with the video content is received, based on the received information associated with the video content. 
       FIGS. 5A to 5C  are views for describing a process in which the display device  100  receives information associated with video content from the user terminal device  200 , and outputs content based on the received information according to an embodiment. 
     As shown in  FIG. 5A , the display device  100  may be in a powered-off state. A function to be described later may be performed even in a state in which the display device  100  is powered off. 
     As shown in  FIG. 5B , based on the user terminal device  200  being brought within communicative proximity of the powered-off display device  100 , the display device  100  may receive the wake-up signal from the user terminal device  200  and enter the standby mode in which the predetermined standby screen  30  is provided. 
     Specifically, the display device  100  may display, on a region of the standby screen  30 , indicators  50  and  60  indicating that the user terminal device  200  is within communicative proximity of the display device  100 . The region may correspond to a position where the user terminal device  200  is within communicative proximity. According to an embodiment, and as shown in  FIG. 5B , in a case where the user terminal device  200  is within communicative proximity of the display device  100  at the right-upper side of the display device  100 , the display device  100  may display the indicator  50  indicating that the user terminal device  200  is within communicative proximity, on a right-upper side region of the display  120 . In  FIG. 5B , the indicator  50  indicating that the user terminal device  200  is within communicative proximity on the right-upper side region of the display  120  is implemented in a form in which water spreads, but this is merely an embodiment, and the indicator  50  may be implemented in various forms. As video content is being output via the user terminal device  200 , the display device  100  may display the indicator  60  indicating video content on the right-upper region of the display  120 . Although the indicator  60  indicating video content is implemented by a play button in  FIG. 5B , the indicator  60  may be a thumbnail icon of video content to be received from the user terminal device  200 , or may be a title of the received image content. That is, the indicators  50  and  60  illustrated in  FIG. 5B , which indicate that the user terminal device  200  is within communicative proximity, are merely an embodiment, and the indicators  50  and  60  indicating that the user terminal device  200  is within communicative proximity may be implemented in various forms. 
     Further, base on the user terminal device  200  being brought within communicative proximity of the display device  100 , the display device  100  may receive information (e.g., an IP address, received content history, user information, security settings, a network environment, and the like, of the user terminal device  200 ) associated with the user terminal device  200 . Therefore, the display device  100  may display, on the standby screen  30 , a UI  70 - 1  indicating that the user terminal device  200  is within communicative proximity, based on the received information. For example, in a case where information indicating that a name of a user of the user terminal device  200  is “Chulsoo” is received from the user terminal device  200 , the display device  100  may display, on the standby screen  30 , the UI  70 - 1  that displays a phrase “Hello, Chulsoo.” Further, the display device  100  may display, on the standby screen  30 , a UI  70 - 2  that displays weather and calendar information or a UI  70 - 3  that displays latest content information, but this is merely an embodiment, and the display device  100  may display a UI displaying various types of information. 
     Based on the user terminal device  200  being brought within communicative proximity of the display device  100 , the display device  100  may transmit, to the user terminal device  200 , a signal that requests the user terminal device  200  for information associated with content. As shown in  FIG. 5B , based on receiving the signal that requests information associated with content from the display device  100 , the user terminal device  200  may identify that video content is being output, and transmit information associated with the video content to the display device  100  by using P2P communication. 
     Further, as shown in  FIG. 5C , in a case where content that is being output via the user terminal device  200  is video content, the display device  100  may be switched from the standby mode to the normal mode, and display video content  10 , and the indicator  20  indicating that video content is received, based on the information associated with the video content that is received from the user terminal device  200 . According to an embodiment, the display device  100  may display the indicator  20  indicating that video content is received for a predetermined time frame and then remove the indicator  20 . 
       FIGS. 6A and 6B  are views for describing a process in which the display device  100  receives information associated with audio content from the user terminal device  200 , and outputs the audio content based on the received information associated with the audio content, according to an embodiment. 
       FIGS. 6A and 6B  illustrate a similar situation as that shown in  FIGS. 5A to 5C  except that audio content is output instead of video content. 
     As illustrated in  FIG. 6A , the display device  100  may display indicators  50  and  80  indicating that the user terminal device  200  is within communicative proximity, on a region of the standby screen  30 . The region may correspond to a position where the user terminal device  200  is within communicative proximity. In contrast to  FIG. 5B , the user terminal device  200  outputs audio content, and thus the indicator  80  indicating that the user terminal device  200  is within communicative proximity may have a musical note shape corresponding to audio content. It should be understood that this is merely an embodiment, and the indicator  80  indicating that the user terminal device  200  is within communicative proximity may be implemented in various forms. Further, as shown in  FIG. 6A , based on receiving the signal that requests information associated with content that is being output via the user terminal device  200  from the display device  100 , the user terminal device  200  may identify that audio content is being output, and transmit information associated with the audio content to the display device  100  by using Bluetooth communication. 
     As shown in  FIG. 6B , based on receiving the information associated with the audio content from the user terminal device  200 , the display device  100  may display, on the standby screen  30 , the audio UIs  40 - 1 ,  40 - 2 , and  40 - 3  that are different than a UI that is being concurrently displayed via the user terminal device  200 , and output the audio content based on the received information associated with the audio content. Further, the display device  100  may display, on the standby screen  30 , the audio UIs  40 - 1 ,  40 - 2 , and  40 - 3  that are generated based on the received information (e.g., a title of the audio content, image information related to the audio content, a play history, a playback point, and a playlist) associated with the audio content that is received from the user terminal device  200 . Specifically, the display device  100  may display the audio UI  40 - 1 , the audio UI  40 - 2 , and the audio UI  40 - 3  on the standby screen  30 . The audio UI  40 - 1  may be generated based on information associated with the title of the audio content and the playback point, the audio UI  40 - 2  may be generated based on information regarding an image relevant to the received audio content, and the playback point, and the audio UI  40 - 3  may be generated based on received information associated with the play history. However, this is merely an embodiment, and the display device  100  may display, on the standby screen  30 , various UIs generated based on information regarding an audio content. 
       FIG. 7  is a view for describing a process in which the display device  100  receives information associated with content from the external server  700  and the user terminal device  200  according to an embodiment. 
     As shown in  FIG. 7 , and in a case where video content that is being output via the user terminal device  200  is video content received from the external server  700 , the display device  100  may receive information associated with the video content from the user terminal device  200 . The information may include a title and a current playback point of the video content that is currently being output via the user terminal device  200 . According to an embodiment, and as shown in  FIG. 7 , the display device  100  may receive, from the user terminal device  200 , information indicating that a title of the video content that is being output via the user terminal device  200  is “hiking,” and information identifying that a current playback point of the video content is 59 minutes. Then, the display device  100  may receive, from the external server  700  from which the user terminal device  200  also receives the video content, a portion of the video content that corresponds to the current playback point of the video content that is being output via the user terminal device  200 , based on the received information. According to an embodiment, the display device  100  may receive, from the external server  700 , video content titled “hiking” after the playback point of 59 minutes. Therefore, the display device  100  may receive and display the video content that corresponds to the current playback point of the video content that is received from the external server  700  and is being output via the user terminal device  200 . 
       FIGS. 8A and 8B  are views for describing a process in which the user terminal device  200  is brought within communicative proximity of the external device  800  connected to the display device  100 , according to an embodiment. In  FIG. 8A , the external device  800  is implemented by a remote controller, but this is merely an embodiment, and the external device  800  may be implemented by various devices such as an AI speaker. According to an embodiment, the external device  800  may include an NFC tag in which information (e.g., a MAC address of the display device  100 ) associated with the display device  100  and connection information are stored. 
     According to an embodiment, based on the display device  100  being in a powered-off state, and based on the user terminal device  200  being brought within communicative proximity of the external device  800  connected to the display device  100 , the user terminal device  200  or the external device  800  may transmit the wake-up signal to the display device  100 . Based on the wake-up signal being received, the display device  100  may enter the standby mode in which the predetermined standby screen  30  is provided. Specifically, the display device  100  may display, on the standby screen  30 , the indicator  80  indicating that the user terminal device  200  is within communicative proximity of the external device  800 , the UI  70 - 1  including information associated with the user terminal device  200  that is received from the user terminal device  200 , and the UIs  70 - 2  and  70 - 3  indicating weather and calendar information and latest content, respectively. However, this is merely an embodiment, and the display device  100  may display a UI including various types of information, on the standby screen  30 . 
     Further, the display device  100  may transmit, to the user terminal device  200 , the signal that requests information associated with content that is being output via the user terminal device  200 . That is, as similar to the case where the user terminal device  200  is directly brought within communicative proximity of the display device  100 , the display device  100  may transmit the signal that requests information associated with content that is being output via the user terminal device  200  even in a case where the user terminal device  200  is within communicative proximity of the external device  800  connected to the display device  100 . 
     In  FIG. 8B , the user terminal device  200  outputs audio content, and thus the user terminal device  200  may transmit information associated with the audio content to the display device  100  by using Bluetooth communication. A subsequent process has been described above with reference to  FIG. 6B , and thus a redundant description may be omitted. 
       FIGS. 9 through 11  are views for describing a process in which the user terminal device  200  is brought within communicative proximity of an NFC tag external to the display device  100 , according to an embodiment. Specifically, the NFC tag including information (e.g., a MAC address of the display device  100 ) associated with the display device  100 , and connection information (e.g., a Bluetooth MAC address and a P2P device MAC address) may be external to the display device  100 . That is, the NFC tag may be disposed externally to the display device  100 , and the embodiments shown in  FIGS. 9 through 11  are merely embodiments. 
     According to an embodiment, an NFC tag  920  may be disposed on a table  910  as shown in  FIG. 9 . Based on the user terminal device  200  being brought within communicative proximity of the NFC tag  920 , the user terminal device  200  may receive, from the NFC tag  920 , information associated with the display device  100  and connection information via NFC with the NFC tag  920 . Further, the user terminal device  200  may connect to the display device  100  based on the received information. 
     The display device  100  may transmit, to the user terminal device  200 , the signal that requests information associated with content that is currently being output via the user terminal device  200 . Based on receiving the signal that requests the information associated with content, the user terminal device  200  may identify a type of the content that is currently being output, and transmit, to the display device  100 , information associated with the content that is being output by using different communication methods according to the identified type of content. Referring to  FIG. 9 , based on video content being output via the user terminal device  200 , the user terminal device  200  may transmit, to the display device  100 , information associated with the video content by using P2P communication. Further, the display device  100  may display the video content and the indicator indicating that the video content is received, based on the received information associated with the video content. A detailed description of the screen on which the video content is output has been provided above with reference to  FIGS. 5B and 5C , and thus redundant description may be omitted. 
     According to an embodiment, an NFC tag  1020  may be disposed on a vehicle handle  1010  as shown in  FIG. 10 . 
     Specifically, based on the user terminal device  200  being brought within communicative proximity of the NFC tag  1020 , the user terminal device  200  may receive, from the NFC tag  1020 , information associated with the display device  100  and connection information via NFC with the NFC tag  1020 . Further, the user terminal device  200  may connect to the display device  100  based on the received information. The display device  100  may transmit, to the user terminal device  200 , the signal that requests transmission of information associated with content that is being output via the user terminal device  200 . Based on receiving the signal that requests the transmission of information associated with content, the user terminal device  200  may identify a type of the content that is currently being output, and transmit, to the display device  100 , information associated with the content that is being output by using different communication methods according to the identified type of content. Referring to  FIG. 10 , based on audio content being output via the user terminal device  200 , the user terminal device  200  may transmit, to the display device  100 , information associated with the audio content by using Bluetooth communication. Then, the display device  100  may output the audio content based on the received information associated with the audio content and display, on the standby screen  30 , the audio UIs  40 - 1 ,  40 - 2 , and  40 - 3  that are different than the UI that is concurrently displayed via the user terminal device  200 . A detailed description of the standby screen  30  and the audio UIs  40 - 1 ,  40 - 2 , and  40 - 3  has been provided above with reference to  FIGS. 6A and 6B , and thus redundant description may be omitted. 
     According to an embodiment, an NFC tag  1120  may be disposed on a bed  1110  as shown in  FIG. 11 . According to an embodiment, the NFC tag  1120  may include a control instruction for executing a specific application, in addition to information associated with the display device  100  and connection information. Specifically, based on the user terminal device  200  being brought within communicative proximity of the NFC tag  1120 , the user terminal device  200  may receive, from the NFC tag  1120 , information associated with the display device  100 , connection information, and a control instruction for executing an alarm application. The user terminal device  200  may connect to the display device  100  based on the information received from the NFC tag  1120  via NFC, and execute an alarm application  1130 . 
     Further, according to an embodiment, based on a user instruction (e.g., an instruction to set an alarm for 8:30 as shown in  FIG. 11 ) being input to the application  1130  executed by the user terminal device  200 , the user terminal device  200  may transmit a signal including the input instruction to the display device  100 . Further, the display device  100  may display a notification UI  1140  that is generated based on the received signal and set alarm. 
       FIG. 11  illustrates a case where the NFC tag  1120  includes the control instruction for executing the alarm application, but this is merely an embodiment, and the NFC tag  1120  may include various control instructions. 
       FIG. 12  is a view for describing a case where the display device  100  is implemented by an AI speaker  1210 , according to an embodiment. An NFC tag  1220  illustrated in  FIG. 12  may include information (e.g., a MAC address of the AI speaker) associated with the AI speaker  1210 , and connection information (e.g., a Bluetooth MAC address and a P2P device MAC address). In addition, the NFC tag  1220  may be embedded in the AI speaker  1210  or disposed on an outer portion of the AI speaker  1210 . 
     Based on the user terminal device  200  being brought within communicative proximity of the NFC tag  1220 , the user terminal device  200  may receive, from the NFC tag  1220 , information associated with the AI speaker  1210  and connection information via NFC. The AI speaker  1210  may transmit, to the user terminal device  200 , the signal that requests information associated with content that is currently being output via the user terminal device  200 . Based on receiving the signal that requests information associated with content, the user terminal device  200  may identify a type of the content that is being output, and transmit, to the AI speaker  1210 , information associated with the content by using different communication methods according to the identified type of content. In  FIG. 12 , based on audio content being output, the user terminal device  200  may transmit information associated with the audio content to the AI speaker  1210  by using Bluetooth communication. Further, the AI speaker  1210  may output the audio content based on the received information associated with the audio content. 
     In addition, based on the AI speaker  1210  being in a powered-off state, and based on the user terminal device  200  being brought within communicative proximity of the NFC tag  1220 , the user terminal device  200  may transmit the wake-up signal to the AI speaker  1210 . Based on receiving the wake-up signal, the AI speaker  1210  may be powered on to output the received content. 
     According to an embodiment, the AI speaker  1210  may not include the NFC tag  1220 . In this case, based on detecting a content request event, the AI speaker  1210  may transmit, to the user terminal device  200 , the signal that requests transmission of information associated with content that is currently being output via the user terminal device  200 . The content request event may be an event in which the user terminal device  200  transmits, to the AI speaker  1210 , a signal that induces transmission of the signal that requests information associated with content that is currently being output. 
       FIG. 12  illustrates a case where the display device  100  is implemented by an AI speaker  1210 , but this is merely an embodiment, and the display device  100  may be implemented by various electronic devices such as a PC. 
       FIGS. 13A through 13C  are views for describing processes in which a connection between the display device  100  and the user terminal device  200  is terminated according to an embodiment. 
     According to an embodiment, and as shown in  FIG. 13A , based on the user terminal device  200  being brought within communicative proximity the display device  100  after a connection is established, the connection between the display device  100  and the user terminal device  200  may be ended. That is, based on the user terminal device  200  being brought within communicative proximity of the NFC tag of the display device  100  in a state in which the connection between the display device  100  and the user terminal device  200  is established, the connection may be ended. Put another way, the user of the user terminal device  200  may perform a first NFC tap to establish the connection, and perform a second NFC tap to end the connection. The display device  100  may display a UI  1310  indicating that the connection is ended. The UI  1310  indicating that communicative connection is ended may be a UI including a message “connection with Chulsoo has been ended” as shown in  FIG. 13A , but this is merely an embodiment, and the UI  1310  may be implemented in various forms. 
     Alternatively, and according to an embodiment, based on the user terminal device  200  being moved away from the display device  100  by a distance exceeding a threshold distance  1320  in a state in which a connection between the display device  100  and the user terminal device  200  is established, the connection may be ended. Specifically, based on a distance between the user terminal device  200  and the display device  100  exceeding the threshold distance, the user terminal device  200  may transmit, to the display device  100 , a signal that ends the connection. Based on receiving the signal that ends the connection, the display device  100  may end the connection with the user terminal device  200 , and display the UI  1310  indicating that connection is ended. 
     According to an embodiment, based on another user terminal device  200 - 1  being brought within communicative proximity of the display device  100  in a state in which a connection between the display device  100  and the user terminal device  200  is established, the established connection may be ended. That is, based on another user terminal device  200 - 1  being brought within communicative proximity of the display device  100 , the display device  100  may end the established connection with the user terminal device  200 , and display the UI  1310  indicating that connection is ended. Further, the display device  100  may transmit, to the terminal device  200 - 1  that is more recently brought within communicative proximity, the signal that requests information associated with content that is currently being output. 
       FIG. 14  is a view for describing a UI  1410  for selecting information associated with content to be transmitted from the user terminal device  200  to the display device  100  according to an embodiment. 
     Based on receiving the signal that requests information associated with content that is currently being output from the display device  100 , the user terminal device  200  may display the UI  1410  for selecting information associated with content to be transmitted to the display device  100 . Specifically, the UI  1410  for selecting information associated with content may include UIs  1420 ,  1430 , and  1440  indicating content to be transmitted. The UI  1420  corresponding to audio content may have a musical note shape as shown in  FIG. 14 , but this is merely an embodiment, and the UI  1420  may be a UI including metadata of audio content. The UI  1430  corresponding to video content may have a play button shape as shown in  FIG. 14 , but this is merely an embodiment, and the UI  1430  may be a thumbnail icon of the video content or a UI including a title of the content, or the like. The UI  1440  corresponding to a uniform resource locator (URL) may be a UI in which a word “URL” is written as shown in  FIG. 14 , or may be a UI including a name of a website accessible via the 
     URL, or control information for installing an application. 
     Based on information associated with content being selected via the UI  1410 , the user terminal device  200  may transmit the selected information associated with content to the display device  100 . Particularly, the user terminal device  200  may transmit the information associated with content to the display device  100  by using different communication methods according to a type of selected information associated with content. Further, the user terminal device  200  may utilize connection information (e.g., a Bluetooth MAC address and a P2P device MAC address) received from the display device  100  to transmit the information associated with content to the display device  100  by using different communication methods according to the type of selected content. According to an embodiment, based on the selected content being audio content, the user terminal device  200  may transmit information associated with the audio content to the display device  100  by using Bluetooth communication. Further, based on the selected content being video content, the user terminal device  200  may transmit information associated with the video content to the display device  100  by using P2P communication. 
       FIGS. 15A and 15B  are views for describing a process in which the display device  100  determines whether to rotate the display  120  according to an embodiment. 
     First, as shown in  FIG. 15A , based on the user terminal device  200  being brought within communicative proximity of the powered-off display device  100 , the display device  100  may receive the wake-up signal from the user terminal device  200 , and enter the standby mode in which the predetermined standby screen  30  is provided. A description of entering the standby mode has been provided above with reference to  FIG. 5B , and thus a redundant description may be omitted. 
     Further, the display device  100  may determine whether to rotate the display  120  based on information associated with video content that includes information identifying orientation information of the video content received from the user terminal device  200 . Specifically, the display device  100  may identify whether an orientation of the display  120  and an orientation of the video content are different from each other based on the information received from the user terminal device  200 . Based on identifying that the orientation of the display  120  and the orientation of the video content are different from each other, the display device  100  may determine to rotate the display  120 . According to an embodiment, and as shown in  FIG. 15B , based on the information indicating that the orientation of the video content is a portrait orientation being received from the user terminal device  200  based on the orientation of the display  120  being a landscape orientation, the display device  100  may identify that the orientation of the display  120  and the orientation of the video content are different from each other. Further, the display device  100  may determine to rotate the display  120  into the portrait orientation, and rotate the display  120  into the determined orientation. 
     According to an embodiment, based on the information indicating that the orientation of the video content is the landscape orientation being received from the user terminal device  200  and based on the orientation of the display  120  being the portrait orientation, the display device  100  may identify that the orientation of the display  120  and the orientation of the video content are different from each other. Further, the display device  100  may determine to rotate the display  120  into the landscape orientation, and rotate the display  120  into the determined orientation. 
     According to an embodiment, based on the information indicating that orientation information of video content is changed being received from the user terminal device  200 , the display device  100  may rotate the display  120  based on the information indicating that orientation information is changed. According to an embodiment, based on both of the orientation of the video content and the orientation of the display  120  being the landscape orientation, and based on information indicating that the orientation of the video content received from the user terminal device  200  is changed from the landscape orientation to the portrait orientation being received, the display device  100  may rotate the display  120  into the portrait orientation from the landscape orientation. 
       FIG. 16  is a flowchart for describing a method for controlling the display device  100  according to an embodiment. First, based on detecting a content request event associated with a request for the display device  100  to output information associated with content that is being output via the user terminal device  200 , the display device  100  may request the user terminal device  200  for information associated with content that is being output via the user terminal device  200  (S 1610 ). According to an embodiment, the content request event may be an event in which the user terminal device  200  is brought within communicative proximity of an NFC tag in which information associated with the display device  100  is stored. That is, a user of the user terminal device  200  may perform an NFC tap using the user terminal device  200 . Put another way, the user may “tag” the user terminal device  200  to the NFC tag. Further, based on the user terminal device  200  being brought within communicative proximity of the display device  100  when the display device  100  is in a powered-off state, the display device  100  may receive the wake-up signal from the user terminal device  200 . Based on receiving the wake-up signal, the display device  100  may enter the standby mode in which the predetermined standby screen is provided. Further, the display device  100  may display the indicator indicating that the user terminal device  200  is within communicative proximity (e.g., that an NFC tap or tag has been performed), on a region of the standby screen that corresponds to a position where the user terminal device  200  is within communicative proximity (e.g., where the NFC tap or tag was performed). 
     The display device  100  may identify a type of the received content (S 1620 ). According to an embodiment, based on determining that the received content is video content, the display device  100  may display the video content based on the received information associated with the video content (S 1630 ). Specifically, in a case where information associated with video content is received, the display device  100  may be switched from the standby mode to the normal mode, and display the video content and the indicator indicating that the video content is received based on the information associated with the video content. 
     According to an embodiment, in a case where information associated with audio content is received from the user terminal device  200 , the display device  100  may display an audio UI that is different from a UI that is concurrently being displayed via the user terminal device  200 , and output the audio content based on the received information associated with the audio content (S 1640 ). Specifically, the display device  100  may generate the audio UI based on the received information associated with the audio content. Further, the display device  100  may output the audio content based on the information associated with the audio content, and display the audio UI on the standby screen. 
       FIG. 17  is a flowchart for describing a method for controlling the user terminal device  200  according to an embodiment. First, based on receiving the signal that requests information associated with content that is currently being output via the user terminal device  200  from the display device  100  while the content is output, the user terminal device  200  may identify a type of the content that is currently being output via the user terminal device  200 . Specifically, the user terminal device  200  may analyze metadata of the content that is currently being output to identify whether the content is audio content or video content (S 1710 ). 
     Further, the user terminal device  200  may transmit information associated with content that is being output via the user terminal device  200  to the display device  100  by using different communication methods based on the identified type of content (S 1720 ). Specifically, in a case where the content that is being output is identified as audio content, the user terminal device  200  may transmit information associated with the audio content to the display device  100  by using Bluetooth communication. In a case where the content that is being played is identified as video content, the user terminal device  200  may transmit information associated with the video content to the display device  100  by using P2P communication. 
     As used herein, the terms “module” or a “[function]er/or” may denote a unit implemented in hardware, software, or firmware, and may be used interchangeably with a term such as logic, a logic block, a part, or a circuit. The terms “[function]er/or” or “module” may indicate an integrated part, or a minimum unit for performing one or more functions, or part thereof. For example, a module may be implemented by an ASIC. 
     Various embodiments of the disclosure may be implemented by software including instructions stored in a machine-readable storage medium (e.g., a non-transitory computer-readable medium). A machine may be a device that invokes the stored instruction from the storage medium and may be operated depending on the invoked instruction, and may include an electronic device (e.g., the display device  100 ) according to the disclosed embodiments. In the case where an instruction is executed by the processor, the processor may directly perform a function corresponding to the instruction or other components may perform the function corresponding to the instruction under a control of the processor. The instruction may include code created or executed by a compiler or an interpreter. The machine-readable storage medium may be provided in a form of a non-transitory storage medium. Here, the term “non-transitory” may mean that the storage medium is tangible, and might not distinguish whether data is semi-permanently or temporarily stored on the storage medium. 
     According to an embodiment, the methods according to the embodiments may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a purchaser. The computer program product may be distributed in a form of a storage medium (e.g., a compact disc read only memory (CD-ROM)) that may be read by the machine or online through an application store (e.g., PlayStore™). In the case of the online distribution, at least portions of the computer program product may be at least temporarily stored in a storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server or be temporarily created. 
     In addition, each of components (e.g., modules or programs) according to the diverse embodiments described above may include a single entity or a plurality of entities, and some of the corresponding sub-components described above may be omitted or other sub-components may be further included in the embodiments. Alternatively or additionally, some of the components (e.g., the modules or the programs) may be integrated into a single entity, and may perform functions performed by the respective corresponding components before being integrated in the same or similar manner. Operations performed by the modules, the programs, or other components according to the embodiments may be executed in a sequential manner, a parallel manner, an iterative manner, or a heuristic manner, at least some of the operations may be performed in a different order or be omitted, or other operations may be added.