Patent Publication Number: US-2023139280-A1

Title: Display device and method of operating the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of earlier filing date and right of priority to Korean Patent Application No(s). 10-2021-0149237, filed on Nov. 2, 2021, the contents of which are all hereby incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     The present disclosure relates to a display device and a method of operating the same. 
     Digital TV services using wired or wireless communication networks are becoming common. Digital TV service can provide a variety of services that could not be provided in the conventional analog broadcasting service. 
     For example, IPTV (Internet Protocol Television), which is a type of digital TV service, and smart TV service provide bidirectionality that allows a user to actively select a type of viewing program and a viewing time. IPTV, smart TV service may provide a variety of additional services, such as Internet search, home shopping, and online games based on this bidirectionality. 
     In addition, recent TVs provide services associated with a camera. 
     However, conventionally, in order to provide camera services (e.g., multi-party video call, AI function or AR function), the platform of TV needs to be changed or there are many restrictions on a system on chip (SoC) of TV. 
     In addition, when an external camera is installed on a TV product, there was a difficulty in development of camera services and coping with bidirectional communication platform. That is, the camera provided only an A/V signal and did not support any communication. 
     In addition, whenever a new camera service is provided, TV needs to be upgraded. 
     In addition, conventionally, a list of peripherals was provided for connection of wireless products and connection was established by user selection. In this case, separate operation such as user selection is necessary, thereby causing user inconvenience. 
     SUMMARY 
     An object of the present disclosure is to minimize change of a platform of a display device for provision of a camera service and to eliminate restrictions on a storage space according to installation of a camera service app. 
     Another object of the present disclosure is to implement bidirectional communication with a camera device mounted outside a display device. 
     Another object of the present disclosure is to automatically perform network setting with a camera device. 
     A display device according to an embodiment of the present disclosure includes a display, a network interface configured to wirelessly communicate with a camera device or a server, an external device interface configured to communicate with the camera device through high definition multimedia interface-consumer electronics control (HDMI-CEC), and a controller configured to display a camera service list including a plurality of camera service items respectively corresponding to a plurality of camera service apps on the display upon connection with the camera device, to transmit, to the camera device, an execution request of a camera service app corresponding to a selected camera service item in response to selection of any one of the plurality of camera service items, and to switch external input to the camera device according to the execution request. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a block diagram illustrating a configuration of a display device according to an embodiment of the present disclosure. 
         FIG.  2    is a block diagram illustrating a remote control device according to an embodiment of the present disclosure. 
         FIG.  3    is a view illustrating an actual configuration of a remote control device according to an embodiment of the present disclosure. 
         FIG.  4    is a view showing an example of utilizing a remote control device according to an embodiment of the present disclosure. 
         FIG.  5    is a view illustrating a configuration of a network interworking camera system according to an embodiment of the present disclosure. 
         FIG.  6    is a block diagram illustrating a configuration of a camera device according to an embodiment of the present disclosure. 
         FIG.  7    is a ladder diagram illustrating a method of operating a network interworking camera system according to an embodiment of the present disclosure. 
         FIG.  8    is a view illustrating an interworking process between a camera device and a display device according to an embodiment of the present disclosure. 
         FIG.  9    is a view illustrating an example of providing a camera service list and switching external input to a camera device according to an embodiment of the present disclosure. 
         FIG.  10    is a view illustrating an example of adding a new service when a new service item is selected from a camera service list according to an embodiment of the present disclosure. 
         FIG.  11    is a view illustrating a process of connecting a display device and an external device through wireless network communication according to the related art. 
         FIG.  12    is a view illustrating a process of connecting a display device and a camera device according to an embodiment of the present disclosure. 
         FIG.  13    is a view illustrating a method of transmitting network setting data transmitted to a camera device through HDMI-CEC according to an embodiment of the present disclosure. 
         FIG.  14    is a view illustrating the format of network setting data according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Hereinafter, embodiments relating to the present invention will be described in detail with reference to the accompanying drawings. The suffixes “module” and “unit” for components used in the description below are assigned or mixed in consideration of easiness in writing the specification and do not have distinctive meanings or roles by themselves. 
     A display device according to an embodiment of the present invention, for example, as an artificial display device that adds a computer supporting function to a broadcast receiving function, can have an easy-to-use interface such as a writing input device, a touch screen, or a spatial remote control device as an Internet function is added while fulfilling the broadcast receiving function. Then, with the support of a wired or wireless Internet function, it is possible to perform an e-mail, web browsing, banking, or game function in access to Internet and computers. In order to perform such various functions, standardized general purpose OS can be used. 
     Accordingly, since various applications are freely added or deleted on a general purpose OS kernel, a display device described herein, for example, can perform various user-friendly functions. The display device, in more detail, can be a network TV, Hybrid Broadcast Broadband TV (HBBTV), smart TV, light-emitting diode (LED) TV, organic light-emitting diode (OLED) TV, and so on and in some cases, can be applied to a smartphone. 
       FIG.  1    is a block diagram illustrating a configuration of a display device according to an embodiment of the present invention. 
     Referring to  FIG.  1   , a display device  100  can include a broadcast reception unit  130 , an external device interface unit  135 , a storage unit  140 , a user interface unit  150 , a control unit  170 , a wireless communication unit  173 , a display unit  180 , an audio output unit  185 , and a power supply unit  190 . 
     The broadcast reception unit  130  can include a tuner  131 , a demodulation unit  132 , and a network interface unit  133 . 
     The tuner  131  can select a specific broadcast channel according to a channel selection command. The tuner  131  can receive broadcast signals for the selected specific broadcast channel. 
     The demodulation unit  132  can divide the received broadcast signals into video signals, audio signals, and broadcast program related data signals and restore the divided video signals, audio signals, and data signals to an output available form. 
     The external device interface unit  135  can receive an application or an application list in an adjacent external device and deliver it to the control unit  170  or the storage unit  140 . 
     The external device interface unit  135  can provide a connection path between the display device  100  and an external device. The external device interface unit  135  can receive at least one an image or audio output from an external device that is wirelessly or wiredly connected to the display device  100  and deliver it to the control unit  170 . The external device interface unit  135  can include a plurality of external input terminals. The plurality of external input terminals can include an RGB terminal, at least one High Definition Multimedia Interface (HDMI) terminal, and a component terminal. 
     An image signal of an external device input through the external device interface unit  135  can be output through the display unit  180 . A sound signal of an external device input through the external device interface unit  135  can be output through the audio output unit  185 . 
     An external device connectable to the external device interface unit  135  can be one of a set-top box, a Blu-ray player, a DVD player, a game console, a sound bar, a smartphone, a PC, a USB Memory, and a home theater system, but this is just exemplary. 
     The network interface unit  133  can provide an interface for connecting the display device  100  to a wired/wireless network including the Internet network. The network interface unit  133  can transmit or receive data to or from another user or another electronic device through an accessed network or another network linked to the accessed network. 
     Additionally, some content data stored in the display device  100  can be transmitted to a user or an electronic device, which is selected from other users or other electronic devices pre-registered in the display device  100 . 
     The network interface unit  133  can access a predetermined webpage through an accessed network or another network linked to the accessed network. That is, the network interface unit  133  can transmit or receive data to or from a corresponding server by accessing a predetermined webpage through the network. 
     Then, the network interface unit  133  can receive contents or data provided from a content provider or a network operator. That is, the network interface unit  133  can receive contents such as movies, advertisements, games, VODs, and broadcast signals, which are provided from a content provider or a network provider, through network and information relating thereto. 
     Additionally, the network interface unit  133  can receive firmware update information and update files provided from a network operator and transmit data to an Internet or content provider or a network operator. 
     The network interface unit  133  can select and receive a desired application among applications open to the air, through network. 
     The storage unit  140  can store signal-processed image, voice, or data signals stored by a program in order for each signal processing and control in the control unit  170 . 
     Additionally, the storage unit  140  can perform a function for temporarily storing image, voice, or data signals output from the external device interface unit  135  or the network interface unit  133  and can store information on a predetermined image through a channel memory function. 
     The storage unit  140  can store an application or an application list input from the external device interface unit  135  or the network interface unit  133 . 
     The display device  100  can play content files (for example, video files, still image files, music files, document files, application files, and so on) stored in the storage unit  140  and provide them to a user. 
     The user interface unit  150  can deliver signals input by a user to the control unit  170  or deliver signals from the control unit  170  to a user. For example, the user interface unit  150  can receive or process control signals such as power on/off, channel selection, and screen setting from the remote control device  200  or transmit control signals from the control unit  170  to the remote control device  200  according to various communication methods such as Bluetooth, Ultra Wideband (WB), ZigBee, Radio Frequency (RF), and IR. 
     Additionally, the user interface unit  150  can deliver, to the control unit  170 , control signals input from local keys (not shown) such as a power key, a channel key, a volume key, and a setting key. 
     Image signals that are image-processed in the control unit  170  can be input to the display unit  180  and displayed as an image corresponding to corresponding image signals. Additionally, image signals that are image-processed in the control unit  170  can be input to an external output device through the external device interface unit  135 . 
     Voice signals processed in the control unit  170  can be output to the audio output unit  185 . Additionally, voice signals processed in the control unit  170  can be input to an external output device through the external device interface unit  135 . 
     Besides that, the control unit  170  can control overall operations in the display device  100 . Additionally, the control unit  170  can control the display device  100  by a user command or internal program input through the user interface unit  150  and download a desired application or application list into the display device  100  in access to network. 
     The control unit  170  can output channel information selected by a user together with processed image or voice signals through the display unit  180  or the audio output unit  185 . 
     Additionally, according to an external device image playback command received through the user interface unit  150 , the control unit  170  can output image signals or voice signals of an external device such as a camera or a camcorder, which are input through the external device interface unit  135 , through the display unit  180  or the audio output unit  185 . 
     Moreover, the control unit  170  can control the display unit  180  to display images and control broadcast images input through the tuner  131 , external input images input through the external device interface unit  135 , images input through the network interface unit, or images stored in the storage unit  140  to be displayed on the display unit  180 . In this case, an image displayed on the display unit  180  can be a still image or video and also can be a 2D image or a 3D image. 
     Additionally, the control unit  170  can play content stored in the display device  100 , received broadcast content, and external input content input from the outside, and the content can be in various formats such as broadcast images, external input images, audio files, still images, accessed web screens, and document files. 
     Moreover, the wireless communication unit  173  can perform a wired or wireless communication with an external electronic device. The wireless communication unit  173  can perform short-range communication with an external device. For this, the wireless communication unit  173  can support short-range communication by using at least one of Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, and Wireless Universal Serial Bus (USB) technologies. The wireless communication unit  173  can support wireless communication between the display device  100  and a wireless communication system, between the display device  100  and another display device  100 , or between networks including the display device  100  and another display device  100  (or an external server) through wireless area networks. The wireless area networks can be wireless personal area networks. 
     Herein, the other display device  100  can be a mobile terminal such as a wearable device (for example, a smart watch, a smart glass, and a head mounted display (HMD)) or a smartphone, which is capable of exchanging data (or inter-working) with the display device  100 . The wireless communication unit  173  can detect (or recognize) a communicable wearable device around the display device  100 . Furthermore, if the detected wearable device is a device authenticated to communicate with the display device  100 , the control unit  170  can transmit at least part of data processed in the display device  100  to the wearable device through the wireless communication unit  173 . Accordingly, a user of the wearable device can use the data processed in the display device  100  through the wearable device. 
     The display unit  180  can convert image signals, data signals, or on-screen display (OSD) signals, which are processed in the control unit  170 , or images signals or data signals, which are received in the external device interface unit  135 , into R, G, and B signals to generate driving signals. 
     Furthermore, the display device  100  shown in  FIG.  1    is just one embodiment of the present invention and thus, some of the components shown can be integrated, added, or omitted according to the specification of the actually implemented display device  100 . 
     That is, if necessary, two or more components can be integrated into one component or one component can be divided into two or more components and configured. Additionally, a function performed by each block is to describe an embodiment of the present invention and its specific operation or device does not limit the scope of the present invention. 
     According to another embodiment of the present invention, unlike  FIG.  1   , the display device  100  can receive images through the network interface unit  133  or the external device interface unit  135  and play them without including the tuner  131  and the demodulation unit  132 . 
     For example, the display device  100  can be divided into an image processing device such as a set-top box for receiving broadcast signals or contents according to various network services and a content playback device for playing contents input from the image processing device. 
     In this case, an operating method of a display device according to an embodiment of the present invention described below can be performed by one of the display device described with reference to  FIG.  1   , an image processing device such as the separated set-top box, and a content playback device including the display unit  180  and the audio output unit  185 . 
     Then, referring to  FIGS.  2  and  3   , a remote control device is described according to an embodiment of the present invention. 
       FIG.  2    is a block diagram illustrating a remote control device according to an embodiment of the present invention and  FIG.  3    is a view illustrating an actual configuration of a remote control device according to an embodiment of the present invention. 
     First, referring to  FIG.  2   , a remote control device  200  can include a fingerprint recognition unit  210 , a wireless communication unit  220 , a user input unit  230 , a sensor unit  240 , an output unit  250 , a power supply unit  260 , a storage unit  270 , a control unit  280 , and a sound acquisition unit  290 . 
     Referring to  FIG.  2   , the wireless communication unit  220  transmits/receives signals to/from an arbitrary any one of display devices according to the above-mentioned embodiments of the present invention. 
     The remote control device  200  can include a radio frequency (RF) module  221  for transmitting/receiving signals to/from the display device  100  according to the RF communication standards and an IR module  223  for transmitting/receiving signals to/from the display device  100  according to the IR communication standards. Additionally, the remote control device  200  can include a Bluetooth module  225  for transmitting/receiving signals to/from the display device  100  according to the Bluetooth communication standards. Additionally, the remote control device  200  can include a Near Field Communication (NFC) module  227  for transmitting/receiving signals to/from the display device  100  according to the NFC communication standards and a WLAN module  229  for transmitting/receiving signals to/from the display device  100  according to the Wireless LAN (WLAN) communication standards. 
     Additionally, the remote control device  200  can transmit signals containing information on a movement of the remote control device  200  to the display device  100  through the wireless communication unit  220 . 
     Moreover, the remote control device  200  can receive signals transmitted from the display device  100  through the RF module  221  and if necessary, can transmit a command on power on/off, channel change, and volume change to the display device  100  through the IR module  223 . 
     The user input unit  230  can be configured with a keypad button, a touch pad, or a touch screen. A user can manipulate the user input unit  230  to input a command relating to the display device  100  to the remote control device  200 . If the user input unit  230  includes a hard key button, a user can input a command relating to the display device  100  to the remote control device  200  through the push operation of the hard key button. This will be described with reference to  FIG.  3   . 
     Referring to  FIG.  3   , the remote control device  200  can include a plurality of buttons. The plurality of buttons can include a fingerprint recognition button  212 , a power button  231 , a home button  232 , a live button  233 , an external input button  234 , a voice adjustment button  235 , a voice recognition button  236 , a channel change button  237 , a check button  238 , and a back button  239 . 
     The fingerprint recognition button  212  can be a button for recognizing a user&#39;s fingerprint. According to an embodiment of the present invention, the fingerprint recognition button  212  can perform a push operation and receive a push operation and a fingerprint recognition operation. The power button  231  can be button for turning on/off the power of the display device  100 . The home button  232  can be a button for moving to the home screen of the display device  100 . The live button  233  can be a button for displaying live broadcast programs. The external input button  234  can be a button for receiving an external input connected to the display device  100 . The voice adjustment button  235  can be a button for adjusting the size of a volume output from the display device  100 . The voice recognition button  236  can be a button for receiving user&#39;s voice and recognizing the received voice. The channel change button  237  can be a button for receiving broadcast signals of a specific broadcast channel. The check button  238  can be a button for selecting a specific function and the back button  239  can be a button for returning to a previous screen. 
     Again, referring to  FIG.  2   , if the user input unit  230  includes a touch screen, a user can touch a soft key of the touch screen to input a command relating to the display device  100  to the remote control device  200 . Additionally, the user input unit  230  can include various kinds of input means manipulated by a user, for example, a scroll key and a jog key, and this embodiment does not limit the scope of the present invention. 
     The sensor unit  240  can include a gyro sensor  241  or an acceleration sensor  243  and the gyro sensor  241  can sense information on a movement of the remote control device  200 . 
     For example, the gyro sensor  241  can sense information on an operation of the remote control device  200  on the basis of x, y, and z axes and the acceleration sensor  243  can sense information on a movement speed of the remote control device  200 . Moreover, the remote control device  200  can further include a distance measurement sensor and sense a distance with respect to the display unit  180  of the display device  100 . 
     The output unit  250  can output image or voice signals in response to manipulation of the user input unit  230  or image or voice signals corresponding to signals transmitted from the display device  100 . A user can recognize whether the user input unit  230  is manipulated or the display device  100  is controlled through the output unit  250 . 
     For example, the output unit  250  can include an LED module  251  for flashing, a vibration module  253  for generating vibration, a sound output module  255  for outputting sound, or a display module  257  for outputting an image, if the user input unit  230  is manipulated or signals are transmitted/received to/from the display device  100  through the wireless communication unit  220 . 
     Additionally, the power supply unit  260  supplies power to the remote control device  200  and if the remote control device  200  does not move for a predetermined time, stops the power supply, so that power waste can be reduced. The power supply unit  260  can resume the power supply if a predetermined key provided at the remote control device  200  is manipulated. 
     The storage unit  270  can store various kinds of programs and application data necessary for control or operation of the remote control device  200 . If the remote control device  200  transmits/receives signals wirelessly through the display device  100  and the RF module  221 , the remote control device  200  and the display device  100  transmits/receives signals through a predetermined frequency band. 
     The control unit  280  of the remote control device  200  can store, in the storage unit  270 , information on a frequency band for transmitting/receiving signals to/from the display device  100  paired with the remote control device  200  and refer to it. 
     The control unit  280  controls general matters relating to control of the remote control device  200 . The control unit  280  can transmit a signal corresponding to a predetermined key manipulation of the user input unit  230  or a signal corresponding to movement of the remote control device  200  sensed by the sensor unit  240  to the display device  100  through the wireless communication unit  220 . 
     Additionally, the sound acquisition unit  290  of the remote control device  200  can obtain voice. The sound acquisition unit  290  can include at least one microphone and obtain voice through the microphone  291 . 
       FIG.  4    is a view of utilizing a remote control device according to an embodiment of the present invention.  FIG.  4 ( a )  illustrates that a pointer  205  corresponding to the remote control device  200  is displayed on the display unit  180 . 
     A user can move or rotate the remote control device  200  vertically or horizontally. The pointer  205  displayed on the display unit  180  of the display device  100  corresponds to a movement of the remote control device  200 . Since the corresponding pointer  205  is moved and displayed according to a movement on a 3D space as show in the drawing, the remote control device  200  can be referred to as a spatial remote control device. 
       FIG.  4 ( b )  illustrates that if a user moves the remote control device  200 , the pointer  205  displayed on the display unit  180  of the display device  100  is moved to the left according to the movement of the remote control device  200 . 
     Information on a movement of the remote control device  200  detected through a sensor of the remote control device  200  is transmitted to the display device  100 . The display device  100  can calculate the coordinates of the pointer  205  from the information on the movement of the remote control device  200 . The display device  100  can display the pointer  205  to match the calculated coordinates. 
       FIG.  4 ( c )  illustrates that while a specific button in the remote control device  200  is pressed, a user moves the remote control device  200  away from the display unit  180 . Thus, a selection area in the display unit  180  corresponding to the pointer  205  can be zoomed in and displayed larger. 
     On the other hand, if a user moves the remote control device  200  close to the display unit  180 , a selection area in the display unit  180  corresponding to the pointer  205  can be zoomed out and displayed in a reduced size. 
     On the other hand, if the remote control device  200  is moved away from the display unit  180 , a selection area can be zoomed out and if the remote control device  200  is moved closer to the display unit  180 , a selection area can be zoomed in. 
     Additionally, if a specific button in the remote control device  200  is pressed, recognition of a vertical or horizontal movement can be excluded. That is, if the remote control device  200  is moved away from or closer to the display unit  180 , the up, down, left, or right movement cannot be recognized and only the back and forth movement can be recognized. While a specific button in the remote control device  200  is not pressed, only the pointer  205  is moved according to the up, down, left or right movement of the remote control device  200 . 
     Moreover, the moving speed or moving direction of the pointer  205  can correspond to the moving speed or moving direction of the remote control device  200 . 
     Furthermore, a pointer in this specification means an object displayed on the display unit  180  in response to an operation of the remote control device  200 . Accordingly, besides an arrow form displayed as the pointer  205  in the drawing, various forms of objects are possible. For example, the above concept includes a point, a cursor, a prompt, and a thick outline. Then, the pointer  205  can be displayed in correspondence to one point of a horizontal axis and a vertical axis on the display unit  180  and also can be displayed in correspondence to a plurality of points such as a line and a surface. 
       FIG.  5    is a view illustrating a configuration of a network interworking camera system according to an embodiment of the present disclosure. 
     The network interworking camera system  5  may include a camera device  500 , a display device  100  and an app store server  50 . 
     The camera device  500  may exchange basic control data with the display device  100  through HDMI CEC (High Definition Multimedia Interface Consumer Electronics Control) standard. 
     The basic control data may include a network setting value between the camera device  500  and the display device  100 . The network may be a Wi-Fi network. 
     The network setting value may include a service set identifier (SSID) and a password. 
     The camera device  500  may exchange interworking data with the display device  100  through the Wi-Fi standard. 
     The interworking data may include a software development kit (SDK) for providing a camera service. 
     The display device  100  may receive a camera service list from the app store server  50 . The camera service list may include camera service items which may be provided by the camera device  500  connected with the display device  100 . Each of the camera service items may be a camera service app. 
       FIG.  6    is a block diagram illustrating a configuration of a camera device according to an embodiment of the present disclosure. 
     Referring to  FIG.  6   , the camera device  500  may include a wireless communication interface  510 , a wired communication interface  520 , a memory  520 , an image sensor  540 , an audio processor  550  and a processor  590 . 
     The wireless communication interface  510  may perform wireless communication with the app store server  50  and the display device  100 . 
     The wireless communication interface  510  may include a Wi-Fi module. 
     The wired communication interface  520  may be connected with the external device interface unit  135  of the display device  100 . 
     The wired communication interface  520  may include a HDMI output terminal. The wired communication interface  520  may transmit information to the display device  100  through HDMI-CEC, and receive information from the display device  100 . 
     The memory  530  may store program data, video data and audio data necessary to install the app of the camera service. 
     The image sensor  540  may read information on a subject and transform it into an electrical image signal. The transformed image signal may be transmitted to the display device  100  through the wired communication interface  520 . 
     The audio processor  550  may process audio acquired through a microphone (not shown) and transmit the processed audio to the display device  100 . 
     The processor  590  may control overall operation of the camera device  500 . 
     The processor  590  may receive program necessary to install a camera service app from the app store server  50  and install the camera service app based on the received program data. 
       FIG.  7    is a ladder diagram illustrating a method of operating a network interworking camera system according to an embodiment of the present disclosure. 
     In  FIG.  7   , it is assumed that the camera device  500  and the display device  100  are connected by wire through the HDMI-CEC standard and are wirelessly connected to a network. 
     Wireless network connection may be Wi-Fi network connection. 
     The camera device  500  may be mounted at an upper end of the display device  100 , but the position thereof is merely an example. 
     Referring to  FIG.  7   , the control unit  170  of the display device  100  receives a camera service list from the app store server  50  through the network interface unit  133  (S 701 ). 
     The network interface unit  133  may include a Wi-Fi module. When the display device  100  and the camera device  500  are connected, the control unit  170  may receive the camera service list which may be provided by the camera device  500 . 
     The camera service list may include a plurality of camera service items respectively corresponding to a plurality of camera service apps. 
     The camera service apps may include a home training app, a video call app, a photo/video shooting app. 
     The camera service list may include an item corresponding to a camera service app previously executed on the display device  100 . 
     In another embodiment, the control unit  170  may receive the camera service list from the camera device  500  as connection with the camera device  500  is established. 
     The camera service list may further include a new service item. The new service item may be a camera service item which may be newly provided through the camera device  500 . 
     The control unit  170  of the display device  100  displays the camera service list including a plurality of camera service items on the display unit  180  (S 703 ). 
     The control unit  170  of the display device  100  determines whether the new service item is selected from the plurality of camera service items (S 705 ). 
     When the new service item is selected, the control unit  170  of the display device  100  transmits, to the app store server  50 , a request for downloading a new camera service app corresponding to the new service item to the camera device  500  (S 707 ). 
     That is, the control unit  170  may transmit, to the app store server  50 , a request for installing the new camera service app to the camera device  500  through the network interface unit  133 . 
     The app store server  50  transmits, to the camera device  500 , program data necessary to install the new camera service app in response to the request received from the display device  100  (S 709 ). 
     The processor  590  of the camera device  500  installs the new camera service app based on the program data received from the app store server  50  (S 711 ). 
     The camera device  500  may download the program data for installing the new camera service app from the app store server  50  and install the new camera app based on the program data. 
     Meanwhile, the control unit  170  of the display device  100  transmits an execution request to the camera  50  when the execution request of an existing camera service app is received (S 713 ). 
     The execution request of the camera service app may be a request for switching external input. 
     That is, the control unit  170  may switch external input to the camera device  500  according to the execution request of the camera service app while displaying an image received from a Live TV or a set-top box or an image received from an external device through HDMI. 
     The processor  590  of the camera device  500  executes the existing camera service app according to the received execution request (S 715 ), and transmits an image signal to the display device  100  through the wired communication interface  520  according to execution of the camera service app (S 717 ). 
     The wired communication interface  520  may be connected with the external device interface unit  135  of the display device  100  through a HDMI cable. 
     The image signal may be a signal captured by the image sensor  540  of the camera device  500 . 
     The control unit  170  of the display device  100  displays an image based on the image signal received from the camera device  500  through the display unit  180  (S 719 ). 
       FIG.  8    is a view illustrating an interworking process between a camera device and a display device according to an embodiment of the present disclosure. 
     Referring to  FIG.  8   , the camera device  500  and the display device  100  may be connected through a HDMI cable, and the camera device  500  may transmit video and audio to the display device  100  through the HDMI cable. 
     Each of the camera device  500  and the display device  100  may perform data communication through a network module. The network module may be a Wi-Fi module. 
     Each of the camera device  500  and the display device  100  may be connected to the app store server  50  through a router  800 . 
     The operating system of the camera device  500  may be A OS and the operating system of the display device  100  may be B OS, which may be different from each other. 
     The display device  100  may perform basic control of the camera device  500  through the HDMI-CEC standard. The display device  100  may receive identification information of the camera device  500  through the HDMI-CEC standard, and recognize the camera device  500  based on the received identification information. 
     The display device  100  may transmit, to the camera device  500 , network setting data of the router wirelessly connected thereto through the HDMI-CEC standard. The network setting data may include an SSID and a password. The camera device  500  may access the router through the network setting data and thus perform wireless communication with the display device  100 . 
     The display device  100  may switch external input to the camera device  500  according to execution of the camera service app. 
     The display device  100  may transmit, to the camera device  500 , a 4-directional key control command received from the remote control device  200  through the HDMI-CEC standard. 
     The display device  100  and the camera device  500  exchange interworking data through the Wi-Fi standard. 
     For example, the display device  100  may transmit, to the camera device  500 , coordinates of a pointer controlled according to movement of the remote control device  200  through the Wi-Fi module. 
     The camera device  500  may transmit, to the display device  100 , information on a camera service app installed in the camera device  500 , a remaining storage space and app download progress and information on installation of a new camera service app through the Wi-Fi module. 
     The camera device  500  may transmit an event generated when executing the camera service app to the display device  100  through the Wi-Fi module. For example, when the camera service app is a video call app, a video call signal may be an event. 
     In this way, interworking data having a small data capacity may be exchanged through the Wi-Fi module and data having a large data capacity, such as video data, may be transmitted to the display device  100  through HDMI. 
     Therefore, data exchange may be performed rapidly and efficiently. 
       FIG.  9    is a view illustrating an example of providing a camera service list and switching external input to a camera device according to an embodiment of the present disclosure. 
     The display device  100  may include a camera service list  910  including a plurality of camera service items  911  to  915 . 
     Each item may have the form of an icon, but this is merely an example. 
     The display device  100  may display the camera service list  910  when the camera device  500  is connected. 
     The plurality of camera service items  911  to  915  may correspond to camera service apps, respectively. 
     The first camera service item  911  may be a home training app, a second camera service item  912  may be a video call app, a third camera service item  913  may be a video conference app, a fourth camera service item  914  may be a photo/video shooting app, and a fifth camera service item  915  may be an item for installing a new service app. 
     The first to fourth camera service items  911  to  914  may be items previously provided through the display device  100  by interworking with the camera device  500 . 
     When a command for selecting the first camera service item  911  is received, the display device  100  may switch external input to the camera device  500 . The display device  100  may display an image  930  based on an image signal received from the camera device  500  through the HDMI cable. 
     The image  930  may be an execution screen of a home training app and may include an image captured by the camera device  500 . 
     The display device  100  may control the home training app according to the command received from the remote control device  200 . 
     The display device  100  may display a content image  950  which is being displayed before providing the camera service list  910  according to a command for ending external input of the camera device  500 . 
     According to the embodiment of the present disclosure, a user may receive a service associated with the camera without installing the camera service app in the display device  100 . 
     Therefore, it is not necessary to change the platform of the display device  100  and to eliminate restrictions on the storage space according to app installation. 
     In addition, it is possible to provide a camera service differentiated from the related art through bidirectional communication between the display device  100  and the camera device  500 . 
       FIG.  10    is a view illustrating an example of adding a new service when a new service item is selected from a camera service list according to an embodiment of the present disclosure. 
     When the command for selecting the new service item is received in  FIG.  9   , the display device  100  may display a new service screen  1000  for providing information on a new service, as shown in  FIG.  10   . 
     The new service screen  1000  may include a description information and installation item of a new camera service app. The installation item  1010  may be an item for installing the new camera service app in the camera device  500 . 
     Assume that the new camera service app is an augmented reality (AR) app. 
     When a command for selecting the installation item  1010  is received, the display device  100  may transmit a command for installing the AR app in the camera device  500  to the app store server  50 . 
     The display device  100  may receive a command for selecting the installation item  1010  from the remote control device  200 . 
     The app store server  50  may transmit program data necessary to install the AR app to the camera device  500  according to the received installation command. 
     The camera device  500  may install the AR app based on the received program data. When the AR app is installed in the camera device  500 , the camera device  500  may transmit a notification that AR app installation is completed to the display device  100  through the wired communication interface  520 . 
     The display device  100  may receive the notification that AR app installation is completed from the camera device  500  or the app store server  50 , and display an AR item  1030  corresponding to the AR app on the camera service list  910 . 
     When the AR item  1030  is selected, the display device  100  may transmit an execution command of the AR app to the camera device  500  and display an AR app execution screen  1050  based on an image signal received from the camera device  500 . 
     According to the embodiment of the present disclosure, a user may receive a new camera service without installing an app for the new camera service in the display device  100 . Therefore, whenever the new camera service is released, it is possible to reduce the burden of installing the app in the display device  100  and it is not necessary to upgrade the display device  100 . 
       FIG.  11    is a view illustrating a process of connecting a display device and an external device through wireless network communication according to the related art, and  FIG.  12    is a view illustrating a process of connecting a display device and a camera device according to an embodiment of the present disclosure. 
     Referring to  FIG.  11   , a search process and a connection process are largely required for wireless network communication between the display device  100  and the external device  1100 . 
     The search process is a process in which the display device  100  searches for the external device  1100  and may include a notification transmission process and a pairing process (external device registration process). 
     The connection process may include a network setup process and a process of transmitting a screen to the display device  100 . 
     In the connection process, user operation is necessarily required. 
     For example, in case of connection through Wi-Fi Direct, entry into a soft AP mode is necessary. For this, a device list is provided and the connection process is performed through user selection. 
     In addition, in case of connection through BLE, device registration is necessary. For this, to device list is provided and the connection process is performed through user selection. 
     In case of connection through NFC, the connection process is performed by manually touching an NFC tag. 
     In case of connection through a QR code, a process of providing the QR code and establishing connection by enabling the user to shoot the QR code through a camera is necessary. 
     In this way, there is inconvenience that input operation of the user is necessarily required for connection between the display device  100  and the external device  1100 . 
     Referring to  FIG.  12   , the display device  100  and the camera device  500  are in a disconnected state. 
     When the external device interface unit  135  of the display device  100  and the wired communication interface  520  of the camera device  500  are connected through the HDMI cable, the display device  100  may display a popup window  1200  for displaying that the camera device is connected. 
     After the popup window  1200  is displayed, step S 701  of  FIG.  7    may be sequentially performed. 
     When the display device  100  and the camera device  500  are connected through HDMI-CEC, the display device  100  may transmit a network setting value to the camera device  500 . 
     The network setting value (or network setting data) may include an SSID and a password for accessing a Wi-Fi network (or router). 
     The size of the SSID may be a maximum of 32 Bytes, and the size of the password may be a maximum of 64 Bytes. 
     The camera device  500  may access the Wi-Fi network using the SSID and the password, and thus establish a wireless network with the display device  100 . 
     According to the embodiment of the present disclosure, when the camera device  500  is connected, the display device  100  may provide a connection guide popup and automate network setting, thereby minimizing additional network setting operation. 
     That is, the user does not need to perform additional operation for setting a separate network between the display device  100  and the camera device  500 , thereby improving convenience. 
       FIG.  13    is a view illustrating a method of transmitting network setting data transmitted to a camera device through HDMI-CEC according to an embodiment of the present disclosure, and  FIG.  14    is a view illustrating the format of network setting data according to an embodiment of the present disclosure. 
     The display device  100  and the camera device  500  may share mutual vendor information (manufacturer information), upon connection through HDMI-CEC. 
     Upon connection with the camera device  500  through HDMI-CEC, the display device  100  may include the network setting data in a vendor specific command transmitted to the camera device  500  and transmit it to the camera device  500 . 
     Since the size of user data which may be used in vendor specific command of the HDMI-CEC protocol is 13 Bytes. Since the maximum total size of the SSID and the Password is 96 Bytes, the network setting data may be divided at least 8 times and transmitted to the camera device  500 . 
     Referring to  FIG.  14   , the format of the network setting data is shown. 
     The network setting data  1400  may be named router information AP info. 
     The network setting data  1400  may be composed of a combination of SSID, Password, security type and Is Hidden. 
     The security type may represent a security type and Is Hidden may represent whether the network setting data is hidden. 
     According to an embodiment of the present disclosure, a user may receive a service associated with a camera without installing a camera service app in a display device. Therefore, it is not necessary to change a platform such that the display device provides a camera service, and it is possible to eliminate restrictions on a storage space according to app installation. 
     In addition, it is possible to reduce the burden of installing an app in the display device whenever a new camera service is released, and it is not necessary to upgrade the display device. 
     In addition, the user does not need to perform additional operation for network setting between the display device and the camera device, thereby improving convenience. 
     According to the embodiment of the present disclosure, the above-described method may be implemented as processor-readable code on a processor-readable medium having a program recorded thereon. Examples of the processor-readable medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage, and a carrier wave (e.g., data transmission over the Internet). 
     In the display device described above, the configuration and method of the above-described embodiments are not limitedly applicable, but all or some of the above-described embodiments are selectively combined so that various modifications can be made.