Patent Publication Number: US-2023161542-A1

Title: Source device and sink device for sharing expanded screen, and methods of operating the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of International Application No. PCT/KR2022/012504 designating the United States, filed on Aug. 22, 2022, in the Korean Intellectual Property Receiving Office and claiming priority to Korean Patent Application No. 10-2021-0138310, filed on Oct. 18, 2021, and Korean Patent Application No. 10-2022-0006767, filed on Jan. 17, 2022, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     Various embodiments of the disclosure relate to a source device and a sink device that share an expanded screen, and methods of operating the source device and the sink device. 
     2. Description of Related Art 
     Mirroring may refer, for example, to displaying a screen of an electronic device such as a smartphone or a tablet personal computer (PC) on another electronic device (e.g., a television (TV), a monitor, a projector, etc.). For example, since a size of a display screen of a terminal may be limited, mirroring can allow a user to use content provided by the terminal through a device, such as a TV, having a large screen. Alternatively, if a user needs to show a colleague how to work online, he or she can mirror a computer screen so that the colleague can watch how he or she works on a tablet. In this case, a device that provides a screen to another electronic device may be called a “source device”, and a device that receives the screen may be called a “sink device”. 
     SUMMARY 
     When a sink device mirrors a screen of a source device (e.g., a personal computer (PC)) and/or expands the screen of the source device and displays the expanded screen, the source device may process an input event of a basic input device (e.g., a keyboard, or a mouse). However, if the sink device minimizes the mirrored screen and/or the expanded screen of the source device to be invisible, in a state in which a session with the source device is maintained, it may be impossible to control the screen displayed on the sink device through an input device connected to the source device. In addition, if the mirrored screen or the expanded screen of the source device is displayed with a reduced size in a pop-up window, it may be possible to control the mirrored screen or the expanded screen of the source device using the input device connected to the source device in the pop-up window. However, it may be impossible to control a screen in areas other than the pop-up window. In addition, if a mouse is moved from the reduced mirrored screen displayed in the pop-up window to a screen of the sink device, the input event may be switched by leaving the pop-up window, which may reduce usability. 
     According to example embodiments, a source device may wirelessly share an expanded screen with at least one sink device to implement a second screen in the at least one sink device. 
     According to example embodiments, if the expanded screen is displayed on a plurality of sink devices, the source device may control the expanded screen displayed on the sink devices with continuity by changing a scheme of processing an input event according to a screen focused by an input device connected to the source device and/or display modes of the sink devices. 
     According to an example embodiment, a source device includes a wireless communication module, a memory, and a processor, wherein the processor is configured to transmit an expanded screen, generated by the source device to be displayed on a sink device connected to the source device, to the sink device through the wireless communication module, the expanded screen being a screen displayed on a display of the sink device in association with a first screen displayed on a display of the source device to expand a task space of the source device, to identify a screen focused by an input device connected to the source device among the first screen displayed on the display of the source device and a second screen displayed on the display of the sink device, and to switch a processing scheme to process an input event generated by the input device, based on at least one of a display mode of the sink device or whether the focused screen is the first screen or the second screen. 
     According to an example embodiment, a sink device includes a wireless communication module, a display module, a memory, and a processor, wherein the processor is configured to receive an expanded screen, generated by a source device to be displayed on the sink device, from the source device through the wireless communication module, the expanded screen being a screen displayed on a display of the sink device in association with a first screen displayed on a display of the source device to expand a task space of the source device, to identify a display mode of the display module, and to display an input event generated by an input device connected to the source device on one of the expanded screen, a second screen displayed on the display of the sink device, and a reduced screen generated by reducing the expanded screen, according to the display mode and a processing scheme switched in the source device based on the display mode, when a screen focused by the input device is the second screen among the first screen and the second screen. 
     According to an example embodiment, a method of operating a source device includes transmitting an expanded screen, generated by the source device to be displayed on a sink device connected to the source device, to the sink device, the expanded screen being a screen displayed on a display of the sink device in association with a first screen displayed on a display of the source device to expand a task space of the source device, identifying a screen focused by an input device connected to the source device among the first screen displayed on the display of the source device and a second screen displayed on the display of the sink device, and switching a processing scheme to process an input event generated by the input device based on a display mode of the sink device to a first scheme of allowing the source device to display the input event or a second scheme of transmitting a control signal to allow the sink device to display the input event, when the focused screen is the second screen of the sink device. 
     According to an example embodiment, a method of operating a sink device includes receiving an expanded screen, generated by a source device to be displayed on the sink device, from the source device, the expanded screen being a screen displayed on a display of the sink device in association with a first screen displayed on a display of the source device to expand a task space of the source device, identifying a display mode of the sink device, and displaying an input event generated by an input device connected to the source device on one of the expanded screen, a second screen of the sink device, and a reduced screen generated by reducing the expanded screen, according to the display mode and a processing scheme switched in the source device based on the display mode, when a screen focused by the input device is the first screen of the sink device among the first screen and the second screen. 
     According to example embodiments, a source device may control a screen of a sink device through an input device connected to the source device without restriction even though a display mode of the sink device is changed. 
     According to example embodiments, a source device may enhance usability of a user by focusing and continuously controlling a screen of a sink device using an input device connected to the source device, instead of using an input device connected to the sink device itself. 
    
    
     
       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 detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a block diagram illustrating an electronic device in a network environment according to various example embodiments; 
         FIG.  2    is a block diagram illustrating a program according to various example embodiments; 
         FIG.  3    is a block diagram illustrating a source device according to an example embodiment; 
         FIG.  4    is a block diagram illustrating a sink device according to an example embodiment; 
         FIGS.  5 A,  5 B, and  5 C  are diagrams illustrating screen configurations of a source device and a sink device in display modes according to example embodiments; 
         FIGS.  6 A and  6 B  are diagrams illustrating examples of an operation performed when a focused screen is changed by an input device connected to a source device according to example embodiments; 
         FIGS.  7 A and  7 B  are diagrams illustrating examples of an operation of a source device and an operation of a sink device when a display mode of the sink device is changed according to example embodiments; 
         FIG.  8    is a flowchart illustrating an example of a method of operating a source device according to an example embodiment; 
         FIG.  9    is a flowchart illustrating another example of a method of operating a source device according to an example embodiment; 
         FIG.  10    is a flowchart illustrating an example of a method of operating a sink device according to an example embodiment; 
         FIG.  11    is a flowchart illustrating another example of a method of operating a sink device according to an example embodiment; and 
         FIG.  12    is a diagram illustrating an input device according to an example embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, various example embodiments will be described in detail with reference to the accompanying drawings. When describing the example embodiments with reference to the accompanying drawings, like reference numerals refer to like elements and a repeated description related thereto will be omitted. 
       FIG.  1    is a block diagram illustrating an electronic device  101  in a network environment  100  according to various example embodiments. Referring to  FIG.  1   , the electronic device  101  in the network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or communicate with at least one of an electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an example embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . According to an example embodiment, the electronic device  101  may include a processor  120 , a memory  130 , an input module  150 , a sound output module  155 , a display module  160 , an audio module  170 , a sensor module  176 , an interface  177 , a connecting terminal  178 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module (SIM)  196 , or an antenna module  197 . In some example embodiments, at least one of the components (e.g., the connecting terminal  178 ) may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In some example embodiments, some of the components (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) may be integrated as a single component (e.g., the display module  160 ). 
     The processor  120  may execute, for example, software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  connected to the processor  120 , and may perform various data processing or computation. According to an example embodiment, as at least a part of data processing or computation, the processor  120  may store a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in a volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in a non-volatile memory  134 . According to an example embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)) or an auxiliary processor  123  (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently of, or in conjunction with the main processor  121 . For example, when the electronic device  101  includes the main processor  121  and the auxiliary processor  123 , the auxiliary processor  123  may be adapted to consume less power than the main processor  121  or to be specific to a specified function. The auxiliary processor  123  may be implemented separately from the main processor  121  or as a part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one (e.g., the display module  160 , the sensor module  176 , or the communication module  190 ) of the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state or along with the main processor  121  while the main processor  121  is an active state (e.g., executing an application). According to an example embodiment, the auxiliary processor  123  (e.g., an ISP or a CP) may be implemented as a portion of another component (e.g., the camera module  180  or the communication module  190 ) that is functionally related to the auxiliary processor  123 . According to an example embodiment, the auxiliary processor  123  (e.g., an NPU) may include a hardware structure specified for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. Such learning may be performed by, for example, the electronic device  101  in which artificial intelligence is performed, or performed via a separate server (e.g., the server  108 ). Learning algorithms may include, but are not limited to, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The AI model may include a plurality of artificial neural network layers. An artificial neural network may include, for example, a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), and a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more thereof, but is not limited thereto. The AI model may additionally or alternatively include a software structure other than the hardware structure. 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thereto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored as software in the memory  130 , and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input module  150  may receive a command or data to be used by another component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . The input module  150  may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen). 
     The sound output module  155  may output a sound signal to the outside of the electronic device  101 . The sound output module  155  may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record. The receiver may be used to receive an incoming call. According to an example embodiment, the receiver may be implemented separately from the speaker or as a part of the speaker. 
     The display module  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display module  160  may include, for example, a control circuit for controlling a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, the hologram device, and the projector. According to an example embodiment, the display module  160  may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electric signal or vice versa. According to an example embodiment, the audio module  170  may obtain the sound via the input module  150  or output the sound via the sound output module  155  or an external electronic device (e.g., the electronic device  102  such as a speaker or a headphone) directly or wirelessly connected to the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and generate an electrical signal or data value corresponding to the detected state. According to an example embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or a fingerprint sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an example embodiment, the interface  177  may include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     The connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected to an external electronic device (e.g., the electronic device  102 ). According to an example embodiment, the connecting terminal  178  may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector). 
     The haptic module  179  may convert an electric signal into a mechanical stimulus (e.g., a vibration or a movement) or an electrical stimulus which may be recognized by a user via his or her tactile sensation or kinesthetic sensation. According to an example embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image and moving images. According to an example embodiment, the camera module  180  may include one or more lenses, image pixels, image signal processors, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to an example embodiment, the power management module  188  may be implemented as, for example, at least a part of a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an example embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more communication processors that are operable independently of the processor  120  (e.g., an AP) and that support a direct (e.g., wired) communication or a wireless communication. According to an example embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module  194  (e.g., a local area network (LAN) communication module, or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device  104  via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network  199  (e.g., a long-range communication network, such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the SIM  196 . 
     The wireless communication module  192  may support a 5G network after a 4G network, and next-generation communication technology, e.g., new radio (NR) access technology. The NR access technology may support enhanced mobile broadband (eMBB), massive machine type communications (mMTC), or ultra-reliable and low-latency communications (URLLC). The wireless communication module  192  may support a high-frequency band (e.g., a mmWave band) to achieve, e.g., a high data transmission rate. The wireless communication module  192  may support various technologies for securing performance on a high-frequency band, such as, e.g., beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module  192  may support various requirements specified in the electronic device  101 , an external electronic device (e.g., the electronic device  104 ), or a network system (e.g., the second network  199 ). According to an example embodiment, the wireless communication module  192  may support a peak data rate (e.g., 20 Gbps or more) for implementing eMBB, loss coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of downlink (DL) and uplink (UL), or a round trip of 1 ms or less) for implementing URLLC. 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an example embodiment, the antenna module  197  may include an antenna including a radiating element including a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an example embodiment, the antenna module  197  may include a plurality of antennas (e.g., array antennas). In such a case, at least one antenna appropriate for a communication scheme used in a communication network, such as the first network  198  or the second network  199 , may be selected by, for example, the communication module  190  from the plurality of antennas. The signal or the power may be transmitted or received between the communication module  190  and the external electronic device via the at least one selected antenna. According to an example embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as a part of the antenna module  197 . 
     According to various example embodiments, the antenna module  197  may form a mmWave antenna module. According to an example embodiment, the mmWave antenna module may include a PCB, an RFIC disposed on a first surface (e.g., a bottom surface) of the PCB or adjacent to the first surface and capable of supporting a designated a high-frequency band (e.g., the mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., a top or a side surface) of the PCB, or adjacent to the second surface and capable of transmitting or receiving signals in the designated high-frequency band. 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an example embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the external electronic devices  102  or  104  may be a device of the same type as or a different type from the electronic device  101 . 
     According to an example embodiment, all or some of operations to be executed by the electronic device  101  may be executed at one or more external electronic devices (e.g., the external devices  102  and  104 , and the server  108 ). For example, if the electronic device  101  needs to perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and may transfer an outcome of the performing to the electronic device  101 . The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device  101  may provide ultra low-latency services using, e.g., distributed computing or mobile edge computing. In an example embodiment, the external electronic device  104  may include an Internet-of-things (IoT) device. The server  108  may be an intelligent server using machine learning and/or a neural network. According to an example embodiment, the external electronic device  104  or the server  108  may be included in the second network  199 . The electronic device  101  may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology or IoT-related technology. 
       FIG.  2    is a block diagram  200  illustrating a program  140  according to various example embodiments. According to an example embodiment, the program  140  may include an OS  142  to control one or more resources of the electronic device  101 , middleware  144 , or an application  146  executable in the OS  142 . The OS  142  may include, for example, Android™ iOS™, Windows™, Symbian™, Tizen™, or Bada™. At least part of the program  140 , for example, may be pre-loaded on the electronic device  101  during manufacture, or may be downloaded from or updated by an external electronic device (e.g., the electronic device  102  or  104 , or the server  108 ) during use by a user. 
     The OS  142  may control management (e.g., allocation or deallocation) of one or more system resources (e.g., a process, a memory, or a power source) of the electronic device  101 . The OS  142  may additionally or alternatively include other one or more driver programs to drive other hardware devices of the electronic device  101 , for example, the input module  150 , the sound output module  155 , the display module  160 , the audio module  170 , the sensor module  176 , the interface  177 , the haptic module  179 , the camera module  180 , the power management module  188 , the battery  189 , the communication module  190 , the SIM  196 , or the antenna module  197 . 
     The middleware  144  may provide various functions to the application  146  such that a function or information provided from one or more resources of the electronic device  101  may be used by the application  146 . The middleware  144  may include, for example, an application manager  201 , a window manager  203 , a multimedia manager  205 , a resource manager  207 , a power manager  209 , a database manager  211 , a package manager  213 , a connectivity manager  215 , a notification manager  217 , a location manager  219 , a graphic manager  221 , a security manager  223 , a telephony manager  225 , or a voice recognition manager  227 . 
     The application manager  201  may, for example, manage the life cycle of the application  146 . The window manager  203 , for example, may manage one or more graphical user interface (GUI) resources that are used on a screen. The multimedia manager  205 , for example, may identify one or more formats to be used to play media files, and may encode or decode a corresponding one of the media files using a codec appropriate for a corresponding format selected from the one or more formats. The resource manager  207 , for example, may manage the source code of the application  146  or a memory space of the memory  130 . The power manager  209 , for example, may manage the capacity, temperature, or power of the battery  189 , and may determine or provide related information to be used for the operation of the electronic device  101  based on at least in part on corresponding information of the capacity, temperature, or power of the battery  189 . According to an example embodiment, the power manager  209  may interwork with a basic input/output system (BIOS) (not shown) of the electronic device  101 . 
     The database manager  211 , for example, may generate, search, or change a database to be used by the application  146 . The package manager  213 , for example, may manage installation or update of an application that is distributed in the form of a package file. The connectivity manager  215 , for example, may manage a wireless connection or a direct connection between the electronic device  101  and an external electronic device. The notification manager  217 , for example, may provide a function to notify a user of an occurrence of a specified event (e.g., an incoming call, a message, or an alert). The location manager  219 , for example, may manage position information on the electronic device  101 . The graphic manager  221 , for example, may manage one or more graphic effects to be offered to a user or a user interface related to the one or more graphic effects. 
     The security manager  223 , for example, may provide system security or user authentication. The telephony manager  225 , for example, may manage a voice call function or a video call function provided by the electronic device  101 . The voice recognition manager  227 , for example, may transmit user&#39;s voice data to the server  108 , and may receive, from the server  108 , a command corresponding to a function to be executed on the electronic device  101  based on at least in part on the voice data, or text data converted based on at least in part on the voice data. According to an example embodiment, the middleware  144  may dynamically delete some existing components or add new components. According to an example embodiment, at least part of the middleware  144  may be included as part of the OS  142  or may be implemented as another software separate from the OS  142 . 
     The application  146  may include, for example, a home  251 , dialer  253 , short message service (SMS)/multimedia messaging service (MMS)  255 , instant message (IM)  257 , browser  259 , camera  261 , alarm  263 , contact  265 , voice recognition  267 , email  269 , calendar  271 , media player  273 , album  275 , watch  277 , health  279  (e.g., for measuring the degree of workout or biometric information, such as blood sugar), or environmental information  281  (e.g., for measuring air pressure, humidity, or temperature information) application. According to an example embodiment, the application  146  may further include an information exchanging application (not shown) that is capable of supporting information exchange between the electronic device  101  and an external electronic device. The information exchange application, for example, may include a notification relay application adapted to transfer designated information (e.g., a call, message, or alert) to the external electronic device or a device management application adapted to manage the external electronic device. The notification relay application may transfer notification information corresponding to an occurrence of a specified event (e.g., receipt of an email) at another application (e.g., the email application  269 ) of the electronic device  101  to the external electronic device. Additionally or alternatively, the notification relay application may receive notification information from the external electronic device and provide the notification information to a user of the electronic device  101 . 
     The device management application may control a power source (e.g., turning on or off) or a function (e.g., brightness, resolution, or focus) of an external electronic device that communicates with the electronic device  101  or a portion of components of the external electronic device (e.g., a display module or a camera module). The device management application may additionally or alternatively support installation, deletion, or update of an application that operates in an external electronic device. 
     The electronic devices according to various example embodiments may be various types of electronic devices. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. According to an example embodiment of the disclosure, the electronic device is not limited to those described above. 
     It should be appreciated that various example embodiments of the present disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular example embodiments and include various changes, equivalents, or replacements for a corresponding example embodiment. In connection with the description of the drawings, like reference numerals may be used for similar or related components. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things, unless the relevant context clearly indicates otherwise. As used herein, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A, B, or C,” may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “1st”, “2nd”, or “first” or “second” may simply be used to distinguish the component from other components in question, and does not limit the components in other aspects (e.g., importance or order). It is to be understood that if an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with,” “coupled to,” “connected with,” or “connected to” another element (e.g., a second element), the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element. 
     As used in connection with various example embodiments of the disclosure, the term “module” may include a unit implemented in hardware, software, or firmware, or any combination thereof, and may interchangeably be used with other terms, for example, “logic,” “logic block,” “part,” or “circuitry”. A module may be a single integral component, or a minimum unit or part thereof, adapted to perform one or more functions. For example, according to an example embodiment, the module may be implemented in a form of an application-specific integrated circuit (ASIC). 
     Various example embodiments as set forth herein may be implemented as software (e.g., the program  140 ) including one or more instructions that are stored in a storage medium (e.g., an internal memory  136  or an external memory  138 ) that is readable by a machine (e.g., the electronic device  101  of  FIG.  1   ). For example, a processor (e.g., the processor  120 ) of the machine (e.g., the electronic device  101 ) may invoke at least one of the one or more instructions stored in the storage medium, and execute it. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include a code generated by a compiler or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term “non-transitory” storage medium may refer, for example, to a tangible device, and does not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     According to an example embodiment, a method according to various example embodiments of the disclosure 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 buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PlayStore™), or between two user devices (e.g., smartphones) directly. If distributed online, at least part of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as memory of the manufacturer&#39;s server, a server of the application store, or a relay server. 
     According to various example embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities, and some of the multiple entities may be separately disposed in different components. According to various example embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. In such a case, according to various example embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to various example embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added. 
       FIG.  3    is a block diagram illustrating a source device according to an example embodiment. Hereinafter, a source device  300  (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , a source device  610  of  FIGS.  6 A and  6 B , and a source device  710  of  FIGS.  7 A and  7 B ) may, for example, correspond to a device configured to provide an expanded screen (e.g., expanded screens  520  and  530  of  FIG.  5 A , and/or an expanded screen  720  of  FIGS.  7 A and  7 B ) to a sink device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , a sink device  400  of  FIG.  4   , and/or sink devices  630  and  650  of  FIGS.  6 A and  6 B ). The source device  300  may be, for example, a personal computer (PC) or a notebook computer, but is not limited thereto. 
     The source device  300  may share the expanded screens  520 ,  530 , and  720  of the source device  300  with the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . Here, the source device  300  and the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  may be close to each other and may, for example, be connected to the same wireless fidelity (Wi-Fi) network. The source device  300  may correspond to, for example, an electronic device that supports Miracast. The source device  300  may transcode a screen of a display module  320  and transmit the expanded screens  520 ,  530 , and  720  to the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  through wireless communication, for example, Wi-Fi, to share the expanded screens  520 ,  530 , and  720  with the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . 
     The expanded screens  520 ,  530 , and  720  may, for example, be screens generated by the source device  300  to be displayed on the sink device  400  connected to the source device  300 . The expanded screens  520 ,  530 , and  720  may correspond to screens that are displayed on a display of the sink device  400  in association with a first screen displayed on a display of the source device  300  to expand a task space of the first screen of the source device  300 . Here, the above expanded screen displayed “in association with” the first screen displayed on the display of the source device  300  may include the same content as an image displayed on the display of the source device  300 , and may also include an image obtained by transcoding an image, for example, images different in a size, a resolution, and an aspect ratio, and an image displayed on the display of the source device  300 , into a video format and/or audio format determined according to codec settings between the source device  300  and the sink device  400 . 
     The source device  300  may perform screen sharing and/or mirroring with other electronic devices (e.g., mobile terminals, tablets, and wearable devices) by transmitting the expanded screens  520 ,  530 , and  720  to the other electronic devices. 
     The expanded screens  520 ,  530 , and  720  may correspond to screens including the same content as the first screen output from the display module  320  of the source device  300 . The expanded screens  520 ,  530 , and  720  may have, for example, the same resolution and/or the same aspect ratio as those of the first screen output from the display module  320  of the source device  300 , or have a resolution or aspect ratio different from those of the first screen output from the display module  320  of the source device  300 . 
     For example, the expanded screens  520 ,  530 , and  720  may also be displayed on the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  in a form of a reduced screen (e.g., reduced screens  563  and  573  of  FIG.  5 C , and/or a reduced screen  745  of  FIG.  7 B ) that is less in size than the first screen output from the display module  320  of the source device  300  by a user setting. The reduced screens  563 ,  573 , and  745  reduced from the expanded screens  520 ,  530 , and  720  may also be generated by the source device  300 , or the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . 
     The video format and/or audio format of the expanded screen  520 ,  530 ,  720  may be determined according to codec settings between the source device  300  and the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . The source device  300  may process an input event (hereinafter, referred to as a “first input event”) occurring in a first screen displayed on a display connected to the source device  300  by an input device (hereinafter, referred to as a “first input device”) connected to the source device  300 , and/or a second screen (hereinafter, referred to as a “second screen of a sink device”) displayed on a display connected to the sink device  400 . In addition, the source device  300  may receive and process an input event (hereinafter, referred to as a “second input event”), for example, a touch input  1250  to a touch screen (e.g., a touch screen  1240  of  FIG.  12   ), an input of a mouse (e.g., a mouse  1230  of  FIG.  12   ), and a key input of a keyboard (e.g., a keyboard  1210  of  FIG.  12   ), that occur in the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  through a user input back channel (UIBC). 
     The UIBC may have a reverse channel structure that is also referred to as a user interface back channel, and may be configured to allow the sink device  400  to transmit user inputs occurring in the sink device  400  to the source device  300 . The reverse channel structure may also allow user interface functions and upper layer messages for transmitting user inputs to reside in an Internet protocol (IP) transmission layer between the sink device  400  and the source device  300 . To promote reliable transmission and sequential transfer of data packets including user input data, the UIBC may also be configured to be executed on communication protocols based on different packets, for example, a transmission control protocol/Internet protocol (TCP/IP) or a user datagram protocol (UDP). In addition, the UIBC may also be configured to transmit various types of user input data including cross-platform user input data. For example, the source device  300  may execute an OS A, and the sink device  400  may execute another operating system such as an OS B or C. In an example embodiment, the UIBC may be used to transmit information associated with an input event occurring in a sink device between the source device  300  and the sink device  400 , and accordingly flexibility for a platform and/or OS used by each device may be provided. 
     A screen on which a last input event by the first input device connected to the source device  300  occurs may be referred to as a “focused screen”, which will be further described below with reference to  FIGS.  6 A and  6 B . For example, when a mouse (e.g., a mouse  605  of  FIGS.  6 A and  6 B , and the mouse  1230  of  FIG.  12   ) is connected to the source device  300 , and when a mouse input event such as clicking, dragging, or movement of a cursor of the mouse  605 ,  1230  occurs on the second screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , second screens  540  and  550  of  FIG.  5 B , screens  560  and  570  of  FIG.  5 C , the expanded screen  720  and a second screen  730  of  FIG.  7 A , and/or a screen  740  of  FIG.  7 B ) of the sink device  400 , the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400  may be a focused screen. In this example, coordinates of a point at which a cursor of the mouse  605 ,  1230  is located by the last input event on the focused screen may be stored. 
     Hereinafter, the term “second screen” used herein in relation to a target to be focused may refer, for example, to the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  displayed on the display of the sink device  400  regardless of a display mode. In addition, the term “second screen” used in relation to the display mode may refer, for example, to the second screen  540 ,  550 ,  730  of the sink device  400  itself displayed in a minimization mode. 
     If an input event occurs on a focused screen, the source device  300  may set coordinates for processing the input event. For example, if the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400  and if the display mode of the sink device  400  is the reduction mode or the minimization mode, the source device  300  may switch a processing scheme from a first scheme of allowing the source device  300  to display an input event to a second scheme by which the source device  300  transmits a control signal to allow the sink device  400  to display the input event to the sink device  400 . 
     More specifically, if the display mode of the sink device  400  is changed from an expansion mode of displaying the expanded screen  520 ,  530 ,  720  to a minimization mode of displaying the second screen (e.g., the second screens  540  and  550  of  FIG.  5 B , and/or the second screen  730  of  FIG.  7 A ) of the sink device  400 , instead of displaying the expanded screen  520 ,  530 ,  720 , or a reduction mode of displaying a reduced screen obtained by reducing an expanded screen and if a currently focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , the source device  300  may switch the processing scheme from the first scheme to the second scheme. If the focused screen is changed from the first screen of the source device  300  to the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400  and if the display mode of the sink device  400  is changed to the reduction mode or the minimization mode, the source device  300  may also switch the processing scheme from the first scheme to the second scheme. According to the switching of the processing scheme, the source device  300  may transmit, to the sink device  400 , a control signal to allow an input object (e.g., a mouse overlay icon) corresponding to the input event to be displayed at coordinates of a last position of an input device (e.g., the mouse  605  and the keyboard  607  of  FIGS.  6 A and  6 B , and/or the mouse  1230  of  FIG.  12   ) at a point in time at which a mode is changed. In this example, processing of an input event additionally occurring on the focused screen may also be performed at corresponding coordinates (e.g., coordinates of a last position of a mouse). 
     In an example embodiment, a target for focusing may be position coordinates on a screen of a display that generates an icon or indicates an occurrence of an event. According to an example embodiment, if an input event includes depth information, for example, a virtual display or a holographic display of augmented reality (AR) glasses (e.g., a wearable device  1220  of  FIG.  12   ), three-dimensional (3D) position coordinates on the screen of the display may be a target for focusing. 
     For example, it may be assumed that the source device  300  is an electronic device based on the Windows OS, and that the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  are electronic devices based on the Android OS. In this example, the source device  300  may wirelessly share the expanded screens  520 ,  530 , and  720  of the source device  300  with the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  through a mirroring function, to implement the expanded screens  520 ,  530 , and  720  as second screens in the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . The expanded screen  520 ,  530 ,  720  may be displayed identically on electronic devices (e.g., the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 ) other than the source device  300  to be regarded as a screen of a second display of the source device  300 . Accordingly the expanded screen  520 ,  530 ,  720  may also be called a “second screen”. In addition, the expanded screen  520 ,  530 ,  720  may also include a virtual screen displayed by a wearable device, for example, AR glasses (e.g., the wearable device  1220  of  FIG.  12   ). 
     Referring to  FIG.  3   , the source device  300  may include a wireless communication module  310  (e.g., the wireless communication module  192  of  FIG.  1   ), the display module  320  (e.g., the display module  160  of  FIG.  1   ), a memory  330  (e.g., the memory  130  of  FIG.  1   ), and a processor  340  (e.g., the processor  120  of  FIG.  1   ). 
     The wireless communication module  310  (e.g., including wireless communication circuitry) may receive a display mode of each of the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  from the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . 
     The wireless communication module  310  may perform wireless communication with the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 , and may receive an input event of an input device (e.g., the input module  150  of  FIG.  1   , the mouse  605  and the keyboard  607  of  FIGS.  6 A and  6 B , and the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and/or the touch screen  1240  of  FIG.  12   ). The input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  may include, for example, various devices connected to the source device  300  and/or the sink device  101 ,  102 ,  104 ,  400 ,  630 ,  650  via wires or wirelessly to transmit an operation of a user, regardless of a shape. 
     The input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  may include, for example, a pen and a microphone, in addition to the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and the touch screen  1240  as shown in  FIG.  12   , but is not limited thereto. 
     For example, if the focused screen is switched between the first screen of the source device  300  and the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , a position in which an input object (e.g., an overlay mouse icon) corresponding to an input event is generated may need to be changed. Accordingly, the processor  340  (e.g., including processing circuitry) may also transmit an input event occurring after a change in the display mode to the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  through the wireless communication module  310 . 
     The display module  320  may output an image corresponding to the expanded screen  520 ,  530 ,  720 . The “image corresponding to the expanded screen  520 ,  530 ,  720 ” may be an image of the first screen displayed by the display module  320  of the source device  300 . 
     The memory  330  may store computer-executable instructions. The memory  330  may also store a variety of information generated in a processing process of the processor  340 . In addition, the memory  330  may store a variety of data and programs. The memory  330  may include, for example, a volatile memory (e.g., the volatile memory  132  of  FIG.  1   ) or a non-volatile memory (e.g., the non-volatile memory  134  of  FIG.  1   ). The memory  330  may include a high-capacity storage medium such as a hard disk to store a variety of data. 
     The processor  340  may execute instructions stored in the memory  330  by accessing the memory  330 . 
     The processor  340  may transmit the expanded screen  520 ,  530 ,  720 , generated by the source device  300  to be displayed on the sink device  400  connected to the source device  300 , to the sink device  400  through the wireless communication module  310 . The expanded screen  520 ,  530 ,  720  may be a screen that may be displayed on the display of the sink device  400  in association with the first screen displayed on the display of the source device  300  to expand the task space of the source device  300 . 
     The processor  340  may recognize a connection state between the source device  300  and each of the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  through wireless communication by the wireless communication module  310 . The processor  340  may perform wireless communication with at least one sink device  400  of which a connection state is recognized among the sink devices  101 ,  102 ,  104 , and  400  and may receive a display mode of the sink device  400 . 
     The processor  340  may identify a screen focused by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  300  among the first screen displayed on the display of the source device  300  and the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  displayed on the display of the sink device  400 . 
     The processor  340  may switch the processing scheme of processing an input event generated by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240 , based on at least one of the display mode of the sink device  400  or whether the focused screen is the first screen of the source device  300  or the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 . 
     The display mode of the sink device  400  may include, for example, an expansion mode of displaying the expanded screen  520 ,  530 ,  720 , a minimization mode of displaying the second screen  540 ,  550 ,  730  of the sink device  400  instead of the expanded screen  520 ,  530 ,  720 , and a reduction mode of displaying the screen  560 ,  570 ,  740  including the reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720 , but is not limited thereto. The reduced screen  563 ,  573 ,  745  may be displayed on the screen  560 ,  570 ,  740  in the form of overlaying on a pop-up window, however, the example embodiments are not limited thereto. 
     Although a scheme of changing the display mode of the sink device  400  has been described above for convenience of description, the example embodiments may equally be applicable to a scheme of changing a size of an expanded screen without a need to change the display mode in the sink device  400 . 
     The display mode of the sink device  400  and screen configurations of the source device  300  and the sink device  400  according to each display mode will be described in more detail with reference to  FIGS.  5 A,  5 B, and  5 C  below. 
     The processing scheme according to an example embodiment may include, for example, a first scheme of allowing the source device  300  to display an input event, and a second scheme by which the source device  300  transmits a control signal to allow the sink device  400  to display an input event to the sink device  400 , but is not limited thereto. 
     The input event may include, for example, a multi-modal type such as any one or any combination of a gaze movement input in the wearable device  1220  of  FIG.  12   , a hand movement input, and an input according to head tracking, an input event of the mouse  1230 , which includes a click event of the mouse  1230 , a movement event of the mouse  1230 , and a mouse drag event, a key input event of the keyboard  1210 , the touch input  1250  to the touch screen  1240 , a pen input, an input according to gesture recognition, and/or a voice input, but is not limited thereto. 
     Hereinafter, the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  300  may be referred to, for example, as a “first input device”. In addition, the input device  150 ,  1210 ,  1220 ,  1230 ,  1240  connected to at least one sink device  400  may be referred to, for example, as a “second input device”. 
     An input event of the first input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  may be referred to, for example, as a “first input event”, and an input event of the second input device  150 ,  1210 ,  1220 ,  1230 ,  1240  may be referred to, for example, as a “second input event”. 
     Hereinafter, the “input event” described herein may refer to, for example, the first input event occurring in the first input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  300  unless otherwise specified. For example, when the focused screen is the second screen of the sink device  400  and when the display mode of the sink device  400  is the reduction mode or the minimization mode, the processor  340  may switch the processing scheme from the first scheme of allowing the source device  300  to display an input event to the second scheme by which the source device  300  transmits a control signal to allow the sink device  400  to display an input event to the sink device  400 . 
     For example, when the display mode of the sink device  400  is changed from the expansion mode to the reduction mode or the minimization mode and when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 ; or when the focused screen is changed from the first screen of the source device  300  to the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400  and when the display mode of the sink device  400  is changed to the reduction mode or the minimization mode, the processor  340  may switch the processing scheme from the first scheme to the second scheme. When the display mode of the sink device  400  is the reduction mode, the processor  340  may process an input event differently depending on whether the focused screen is an inside area (e.g., an inside area  655  of  FIG.  6 B ) or an outside area (e.g., an outside area  653  of  FIG.  6 B ) of the reduced screen  563 ,  573 ,  745 . 
     In an example, when the display mode of the sink device  400  is the reduction mode and when an input event occurs on the inside area  655  of the reduced screen  563 ,  573 ,  745 , the processor  340  may receive position information of a point at which the input event occurs on the inside area  655  of the reduced screen  563 ,  573 ,  745 , from the sink device  400  and update the expanded screen  520 ,  530 ,  720  based on the received position information. The processor  340  may update at least one of the reduced screen  563 ,  573 ,  745  or the expanded screen  520 ,  530 ,  720 , by converting the position information of the point at which the input event occurs according to the resolution of the reduced screen  563 ,  573 ,  745 , received from the sink device  400 , to match a resolution of the screen of the source device  300 . 
     In another example, when the display mode of the sink device  400  is the reduction mode and when an input event occurs on the outside area  653  of the reduced screen  563 ,  573 ,  745 , the processor  340  may allow the sink device  400  to display an input object (e.g., a mouse overlay icon) corresponding to an input event (e.g., a mouse click event) by transmitting coordinates of a point corresponding to the input event to the sink device  400  according to the second scheme. 
     In an example in which the display mode of the sink device  400  is the minimization mode and the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , when the resolution of the expanded screen  520 ,  530 ,  720  and the resolution of the sink device  400  are different from each other, the processor  340  may determine the coordinates of the point corresponding to the input event based on the resolution of the sink device  400  and may transmit the coordinates of the point corresponding to the input event to the sink device  400  so that the sink device  400  may display an input object corresponding to the input event. 
     In an example in which the display mode of the sink device  400  is changed from the expansion mode to the minimization mode and the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , when the resolution of the expanded screen  520 ,  530 ,  720  and the resolution of the sink device  400  are different from each other, the processor  340  may determine coordinates of the point corresponding to the input event based on the resolution of the sink device  400 . The processor  340  may transmit the coordinates of the point corresponding to the input event to the sink device  400  so that the sink device  400  may display the input object corresponding to the input event. 
     In another example, when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , when the display mode of the sink device  400  is the reduction mode or the minimization mode, and when the input event is a mouse input event, the processor  340  may transmit a control signal to allow the sink device  400  to display a cursor moved in response to the mouse input event, together with coordinate information of the cursor, to the sink device  400  according to the second scheme. 
     The display mode of the sink device  400  may be changed, for example, by a user setting and/or by changing an application setting. For example, the display mode of the sink device  400  may be changed or switched from the expansion mode shown in  FIG.  5 A  to the minimization mode shown in  FIG.  5 B  or the reduction mode shown in  FIG.  5 C , may be changed or switched from the minimization mode shown in  FIG.  5 B  to the expansion mode shown in  FIG.  5 A  or the reduction mode shown in  FIG.  5 C , or may be changed or switched from the reduction mode shown in  FIG.  5 C  to the expansion mode shown in  FIG.  5 A  or the minimization mode shown in  FIG.  5 B . 
     The extension mode may correspond, for example, to a mode of displaying the expanded screen  510  generated and transmitted by the source device  300  on the entire screen of the sink device  400  without a change. The sink device  400  may display the expanded screen  520 ,  530 ,  720  on the entire screen of the display in the expansion mode. 
     The minimization mode may correspond, for example, to a mode in which the expanded screen  520 ,  530 ,  720  is hidden in a background of the sink device  400  and is invisible and in which the second screen (e.g., the second screens  540  and  550  of  FIG.  5 B  and the second screen  730  of  FIG.  7 A ) of the sink device  400  itself, instead of the expanded screen  520 ,  530 ,  720 , is displayed on the entire screen. Since the expanded screen  520 ,  530 ,  720  is minimized and invisible on the second screen  540 ,  550 ,  730  displayed in the minimization mode, the expanded screen  520 ,  530 ,  720  may also be referred to as a “minimized screen” instead of the second screen. 
     In the minimization mode, the source device  300  may stop generating and transmitting of the expanded screen  520 ,  530 ,  720 . In the minimization mode, the sink device  400  may minimize the expanded screen  520 ,  530 ,  720  by hiding the expanded screen  520 ,  530 ,  720  in the background of the sink device  400 , and may display the second screen  540 ,  550 ,  730  that is a screen of the sink device  400 . 
     The reduction mode may correspond, for example, to a mode in which the source device  300  reduces the expanded screen  520 ,  530 ,  720  at a predetermined ratio and transmits the reduced screen, or in which the sink device  400  displays the reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720  at a predetermined rate. The reduced screen  563 ,  573 ,  745  may be overlaid and displayed in the form of, for example, picture in picture (PIP). Since the reduced screen  563 ,  573 ,  745  has, for example, a PIP form, the reduced screen  563 ,  573 ,  745  may also be referred to as “PIP screens”, and the reduction mode may also be referred to as a “PIP mode”. 
     In the reduction mode, the sink device  400  may display a screen (e.g., the screens  560  and  570  of  FIG.  5 C , and/or the screen  740  of  FIG.  7 B ) including the reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720  and overlaid on a portion of the second screen. Operations of the source device  300  and the sink device  400  when the display mode of the sink device  400  is changed will be described in more detail with reference to  FIGS.  7 A and  7 B  below. 
     The processor  340  may update at least one of the expanded screen  520 ,  530 ,  720  or the reduced screen  563 ,  573 ,  745  by reflecting a result of processing an input event according to the display mode. 
     For example, when the display mode is the reduction mode, the processor  340  may receive information associated with an input event newly occurring in the screen  560 ,  570 ,  740  from the sink device  400 . In this example, the processor  340  may receive the information associated with the input event through a separate channel (e.g., a UIBC). The processor  340  may update the reduced screen  563 ,  573 ,  745  by converting coordinates corresponding to a point at which the input event occurs according to the information associated with the input event, based on a difference between the resolution of the expanded screen  520 ,  530 ,  720  and the resolution of the sink device  400 . 
     The processor  340  may focus on the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400  in which a final (e.g., most recent) input event occurs among the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  connected to the source device  300 , and may receive the display mode of the focused sink device  400 . 
     For example, when the display mode is the expansion mode, the processor  340  may directly process the input event and update the expanded screen  520 ,  530 ,  720  based on a result of processing the input event. In an example in which the display mode is the reduction mode or the minimization mode, and in which a focused screen corresponding to a screen on which a last (e.g., most recent) input event is generated by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  300  is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , if the resolution of the expanded screen  520 ,  530 ,  720  and the resolution of the sink device  400  are different from each other, the processor  340  may determine coordinates of a point corresponding to the input event based on the resolution of the sink device  400  and may transmit the coordinates of the point corresponding to the input event to the sink device  400 , so that the sink device  400  may display an input object corresponding to the input event. 
     For example, when the display mode is one of the minimization mode and the reduction mode, the processor  340  may stop transmitting of the expanded screen  520 ,  530 ,  720 , and transmit the input event to the sink device  400  so that the sink device  400  may process the input event. In this example, when the focused screen is the second screen of the sink device  400 , the processor  340  may transmit the reduced screen  563 ,  573 ,  745 , on which an image of an input object that has been overlaid on the expanded screen  520 ,  530 ,  720  is not overlaid, to the sink device  400 . 
     When the resolution of the expanded screen  520 ,  530 ,  720  is different from the resolution of the sink device  400 , the processor  340  may change the resolution of the expanded screen  520 ,  530 ,  720  to match the resolution of the sink device  400 . However, an operation of the processor  340  is not limited to the above-described operations, and the processor  340  may also perform at least one of operations that will be described below with reference to  FIGS.  4  through  12    together with the above-described operation. 
       FIG.  4    is a block diagram illustrating a sink device according to an example embodiment. Hereinafter, in the present specification, the sink device  400  (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , and/or the sink devices  630  and  650  of  FIGS.  6 A and  6 B ) may correspond to a device configured to establish communication with a source device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the source device  300  of  FIG.  3   , the source device  610  of  FIGS.  6 A and  6 B , and/or the source device  710  of  FIGS.  7 A and  7 B ) through a Wi-Fi display session and to share an expanded screen (e.g., the expanded screen  510  of  FIG.  5 A ) generated and/or transmitted by the source device  300 . The sink device  400  may include, for example, the electronic device  101  of  FIG.  1   , such as a smartphone, a laptop, or a tablet, or a wearable electronic device (e.g., the wearable device  1220  of  FIG.  12   ) such as smart glasses, but is not limited thereto. 
     Referring to  FIG.  4   , the sink device  400  according to an example embodiment may include a wireless communication module  410  (e.g., the wireless communication module  192  of  FIG.  1   ), a display module  420  (e.g., the display module  160  of  FIG.  1   ), a memory  430  (e.g., the memory  130  of  FIG.  1   ), and a processor  440  (e.g., the processor  120  of  FIG.  1   ). 
     The wireless communication module  410  (e.g., including wireless communication circuitry) may receive the expanded screen  510  transmitted by the source device  300 . The wireless communication module  410  may receive at least one of a first input event of a first input device (e.g., the input module  150  of  FIG.  1   , the mouse  605  and the keyboard  607  of  FIGS.  6 A and  6 B , and the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and/or the touch screen  1240  of  FIG.  12   ) received from the source device  300 , or a second input event of a second input device  150 ,  1210 ,  1220 ,  1230 ,  1240  connected to the sink device  400 . 
     In addition, the wireless communication module  410  may transmit, to the source device  300 , the display mode of the sink device  400  corresponding to at least one of an occurrence time of an input event or an occurrence time of a mode change event in which the display mode is changed. 
     The display module  420  may display at least one of an expanded screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , and/or the expanded screen  720  of  FIG.  7 A ) displayed on the display of the sink device  400  in the expansion mode, a second screen (e.g., the second screens  540  and  550  of  FIG.  5 B , and the second screen  730  of  FIG.  7 A ) of the sink device  400  displayed on the display of the sink device  400  in the minimization mode, or a screen (e.g., the screens  560  and  570  of  FIG.  5 C , and/or the screen  740  of  FIG.  7 B ) including the reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720  displayed on the display of the sink device  400  in the reduction mode. The memory  430  may store computer-executable instructions. The memory  430  may also store a variety of information generated in a processing process of the processor  440 . In addition, the memory  430  may store a variety of data and programs. The memory  430  may include, for example, a volatile memory (e.g., the volatile memory  132  of  FIG.  1   ) or a non-volatile memory (e.g., the non-volatile memory  134  of  FIG.  1   ). The memory  430  may include a high-capacity storage medium such as a hard disk to store a variety of data. 
     The processor  440  (e.g., including processing circuitry) may receive the extended screen  520 ,  530 ,  720 , generated by the source device  300  to be displayed on the sink device  400 , from the source device  300  through the wireless communication module  410 . The processor  440  may identify a display mode of the display module  420 . The processor  440  may transmit the identified display mode to the source device  300 . 
     The processor  440  may execute instructions by accessing the memory  430 . If a screen focused by an input device (hereinafter, referred to as a “first input device”) connected to the source device  300  is the second screen of the sink device  400  among the first screen of the source device  300  and the second screen of the sink device  400 , the processor  440  may display an input event generated by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  on one of the second screen  540 ,  550 ,  730  of the sink device  400  and the reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720 , based on the display mode and a processing scheme switched in the source device  300  based on the display mode. Here, the processing scheme may refer to a scheme of processing an input event. The processing scheme may include at least one of a first scheme of allowing an input event to be displayed on the first screen of the source device  300 , or a second scheme by which the source device  300  transmits a control signal to display an input event on the second screen of the sink device  400  to the device  400 . 
     The processor  440  may update a screen including an icon based on a result of processing an input event for each display mode. The icon may be, for example, an overlay mouse icon displayed on the second screen of the sink device  400  corresponding to a final input of an input event, but is not limited thereto. 
     For example, when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , and when the display mode is a reduction mode of displaying the screen  560 ,  570  including the reduced screen  563 ,  573 ,  745 , or a minimization mode of displaying the second screen  540 ,  550 ,  730  of the sink device  400 , instead of the expanded screen  520 ,  530 ,  720 , the processor  440  may display the input event on the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400  according to the control signal received from the source device  300  by the second scheme. 
     In an example, when the display mode of the sink device  400  is a reduction mode of displaying the screen  560 ,  570 ,  740 , and when an input event occurs on an inside area of the reduced screen  563 ,  573 ,  745  in the screen  560 ,  570 ,  740 , the processor  440  may transmit information associated with the input event occurring in the inside area of the reduced screen  563 ,  573 ,  745  to the source device  300 . In this example, the information associated with the input event may include, for example, at least one of a type of the input event, a resolution of the reduced screen  563 ,  573 ,  745  in which the input event occurs, or coordinate information corresponding to a point at which the input event occurs based on the resolution of the reduced screen  563 ,  573 ,  745 . 
     In another example, when the display mode is the reduction mode and when an input event occurs on an outside area of the reduced screen  563 ,  573 ,  745 , the processor  440  may display an input object corresponding to the input event based on coordinates of a point at which the input event occurs, received from the source device  300  according to the second scheme. In this example, the “displaying of the input object” may be understood to include, for example, updating content to be displayed on a screen in response to an input of the keyboard  1210 , and changing a position of a cursor and/or an icon in response to the touch input  1250  of the touch screen  1240 , in addition to generating and/or displaying an overlay mouse icon corresponding to a mouse input event. 
     The processor  440  may focus on position coordinates at which a final (e.g., most recent) input event is processed on one of the expanded screen  520 ,  530 ,  720 , the second screen  540 ,  550 ,  730  of the sink device  400 , and the screen  560 ,  570 ,  740 , based on the occurrence time of the mode change event in which the display mode is changed. The processor  440  may display a processing result corresponding to the input event on the focused position coordinates. 
     For example, when the focused screen is the second screen (e.g., the second screens  540  and  550  of  FIG.  5 B , and the second screen  730  of  FIG.  7 A ) of the sink device  400 , and when the display mode of the sink device  400  is the reduction mode or the minimization mode, the processor  440  may receive information on an input event from the source device  300  and display the input event on the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400  based on the information associated with the input event. If the input event is a mouse input event, the processor  440  may display an input object corresponding to the mouse input event based on a control signal to allow the sink device  400  to display a cursor moved in response to the mouse input event and coordinate information of the cursor, transmitted according to the second scheme. 
     If the display mode is the reduction mode or the minimization mode and if the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , the processor  440  may display an input object corresponding to the input event on the focused second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 . 
     For example, when the display mode is changed from the expansion mode to the minimization mode, the processor  440  may perform focusing switching to switch an area in which the input event is to be processed from the expanded screen  520 ,  530 ,  720  to the second screen  540 ,  550 ,  730 , based on the occurrence time of the mode change event in which the display mode is changed. The focusing switching may be performed by, for example, an input of a specific keyboard, or an execution of a specific icon on the second screen of the sink device  400 . In this example, when the display mode is changed due to a difference between the resolution of the expanded screen  520 ,  530 ,  720  and an actual resolution of the sink device  400 , coordinate transformation may be performed on the display screen of the sink device  400 . In an example embodiment, the mode change event may be transmitted from the sink device  400  to the source device  300 , and coordinate transformation according to the changed display mode may be processed in the source device  300 . The source device  300  may transmit coordinates transformed in response to a change in the display mode to the sink device  400  so that the sink device  400  may display a processing result corresponding to the input event. 
     If the display mode is changed from the expansion mode to the reduction mode, the processor  440  may switch an area in which an input event is to be processed from the expanded screen  520 ,  530 ,  720  to an area corresponding to a point where the input event occurs in the screen  560 ,  570 ,  740 , based on the occurrence time of the mode change event in which the display mode is changed. For example, the display mode may be changed from the expansion mode to the reduction mode in a state in which a mouse icon is positioned in a central portion of the expanded screen  520 ,  530 ,  720 . In this example, the processor  440  may switch the area in which the input event is to be processed from the expanded screen  520 ,  530 ,  720  to an area corresponding to the point where the input event occurs in the screen  560 ,  570 ,  740 . In an example, if the reduced screen  563 ,  573 ,  745  is overlaid on the central portion of the screen  560 ,  570 ,  740 , the reduced screen  563 ,  573 ,  745  in the screen  560 ,  570 ,  740  may be focused by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  300  and switched as an area in which an input event is to be processed. In another example, if the reduced screen  563 ,  573 ,  745  is displayed on a partial area of the screen  560 ,  570 ,  740 , the processor  440  may switch an area of the second screen  565 ,  575  corresponding to the outside area of the reduced screen  563 ,  573 ,  745  in the screen  560 ,  570 ,  740  to an area in which an input event is to be processed. 
     If the type of the input event is an input of the mouse  605 ,  1230 , the processor  440  may generate and/or display a mouse icon corresponding to the input event at position coordinates at which a final (most recent) input event is processed. For example, the processor  440  may display a mouse overlay icon based on coordinate information of a cursor moved in response to a mouse movement event according to a control signal to allow the sink device  400  to display the coordinate information of the cursor moved in response to the mouse movement event, transmitted according to the second scheme. 
     For example, when the display mode is one of the minimization mode and the reduction mode, when an input event occurs on the expanded screen  520 ,  530 ,  720  or the reduced screen  563 ,  573 ,  745 , and when the type of the input event is an input of the mouse  605 ,  1230 , the processor  440  may update a position of an icon corresponding to the input event based on a variation in a position of the input event at a point at which the input event occurs. 
     If the display mode is the minimization mode and if the input event is the first input event, the processor  440  may process the first input event to match the processing scheme of the sink device  400  and may display the first input event on the second screen  540 ,  550 . In an example, when the first input event is a mouse input event, the processor  440  may transform coordinate information of the mouse  605 ,  1230  to actual coordinates of the sink device  400  and may change an up/down event of the mouse  605 ,  1230  to corresponding input information of the sink device  400 , so that the mouse input event may be displayed on a screen. 
     In another example, when the first input event is a key input event of the keyboard  607 ,  1210 , the processor  440  may generate a key event corresponding to the sink device  400 , so that the key input event may be displayed on a screen. 
     If the display mode is the expansion mode, the processor  440  may store position coordinates of the display of the sink device  400  in which a final input event among input events occurs. 
     However, an operation of the processor  440  is not limited to the above-described operations, and the processor  440  may also perform at least one of operations that will be described below with reference to  FIGS.  5 A through  12    together with the above-described operation. 
       FIGS.  5 A,  5 B, and  5 C  are diagrams illustrating screen configurations of a source device and a sink device in display modes according to example embodiments. For example, “N” sink devices (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the sink device  400  of  FIG.  4   , and/or the sink devices  630  and  650  of  FIGS.  6 A and  6 B ) may be connected to a source device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the source device  300  of  FIG.  3   , the source device  610  of  FIGS.  6 A and  6 B , and/or the source device  710  of  FIGS.  7 A and  7 B ). In an example embodiment, a sink device with a display that displays a screen currently focused by an input device (e.g., the input module  150  of  FIG.  1   , the mouse  605  of  FIG.  6 A , and the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and/or the touch screen  1240  of  FIG.  12   ) connected to the source device  300  among the “N” sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  of which connection states are recognized by the source device  300  may be referred to as, for example a “target sink device”. 
     In this example, the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  may display the expanded screen  510  generated and transmitted by the source device  300  on displays of the sink devices in association with the first screen displayed on the display of the source device  300  without a change, as shown in the expanded screens  520  and  530  of  FIG.  5 A . The sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  may minimize and display the expanded screen  510  transmitted by the source device  300  to be invisible, as shown in the second screens  540  and  550  of  FIG.  5 B . Alternatively, the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  may reduce the expanded screen  510  transmitted by the source device  300  at a predetermined ratio and display the reduced screens  563  and  573  included in the screens  560  and  570 , as shown in  FIG.  5 C . 
     The source device  300  may recognize the connection states of the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650  based on positions corresponding to the source device  300  and the “N” sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . The source device  300  may process continuous input events of the input devices  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 , and  1240  that occur between the source device  300  and the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 , which will be described below. 
     The source device  300  may focus on a display corresponding to a screen on which an input event is most recent processed, based on a point at which the input event of the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  is last processed, may identify a display mode of the focused display, and may process the input event of the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  differently for each display mode. 
       FIG.  5 A  illustrates configurations of the expanded screens  520  and  530  displayed on a display of the target sink device  400  in the expansion mode according to an example embodiment. 
     For example, when the display mode is the expansion mode, the target sink device  400  may display the expanded screen  510  provided by the source device  300  (e.g., a PC or a notebook) on the entire second screen of the display without a change, as shown in the expanded screens  520  and  530 . Since the expanded screen  510  transmitted by the source device  300  is displayed on the display of the target sink device  400  without a change as shown in the expanded screens  520  and  530  when the display mode is the expansion mode, a screen display on the display of the target sink device  400  in the expansion mode may also be referred to as an “expanded screen”. 
     For example, when the focused display is the display of the target sink device  400  and when the display mode of the target sink device  400  is the expansion mode, the target sink device  400  may process an input event in a similar manner to that of the source device  300 , through the expanded screens  520  and  530  shared by the target sink device  400 . In an example embodiment, for convenience of description, the target sink device  400  receives an input event from the source device  300  through a UIBC, however, the example embodiments are not limited thereto. For example, the target sink device  400  may use various channels to receive an input event from the source device  300 . Here, a second input event (e.g., the touch input  1250  of  FIG.  12   , an input of a mouse, or an input to a keyboard) generated by the second input device  150 ,  1210 ,  1220 ,  1230 ,  1240  connected to the target sink device  400  on the expanded screens  520  and  530  displayed on the display of the target sink device  400  may be directly processed by the target sink device  400 . 
     For example, when the display mode of the target sink device  400  is the minimization mode or the reduction mode, not the expansion mode, the source device  300  may focus on a second screen of a display connected to the target sink device  400  based on a point at which an input event is last processed. The source device  300  may transmit the input event to the target sink device  400  that displays the focused second screen, so that the target sink device  400  may directly process the input event. 
     The display mode in the target sink device  400  may be changed by, for example, a user setting or an application program. If the display mode is changed, the target sink device  400  may transmit a mode change event and/or information corresponding to the mode change event to the source device  300 . The information corresponding to the mode change event may include, for example, a point in time at which the mode change event occurs, a screen focused at the point in time at which the mode change event occurs, and a changed display mode, but is not limited thereto. 
     If the mode change event and/or the information corresponding to the mode change event is received, the source device  300  may process an input event for the display of the target sink device  400  in response to the mode change event. 
       FIG.  5 B  illustrates configurations of the second screens  540  and  550  displayed on the display of the target sink device  400  in the minimization mode according to an example embodiment. 
     For example, when the display mode is the minimization mode, the expanded screen  510  transmitted by the source device  300  may be minimized and may disappear (e.g., not be displayed), and the second screen  540 ,  550  that is the screen of the target sink device  400  may be displayed on the entire display screen of the target sink device  400 . Since only the second screen that is the screen of the target sink device  400  is displayed on the display of the target sink device  400  when the display mode is the minimization mode, a screen displayed on a target sink device in the minimization mode may also be called a “second screen” or a “minimized screen”. 
     The expanded screen  520 ,  530  displayed on the display of the target sink device  400  in the expansion mode may be hidden in the background of the target sink device  400  and minimized in the minimization mode, so that the expanded screen  520 ,  530  may not be recognized by a user. 
     If the display mode of the target sink device  400  is the minimization mode, the source device  300  may stop generating and/or transmitting of the expanded screen  510 . Here, a first input event generated by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  on the expanded screen  520 ,  530  displayed on the target sink device  400  in the expansion mode may be processed on the second screen  540 ,  550  that is the screen of the target sink device  400 , even though the expanded screen  520 ,  530  is not visible because the expanded screen  520 ,  530  operates in the background. 
     For example, when the display mode is the minimization mode, the target sink device  400  may focus on a screen (e.g., the second screen of the target sink device  400 ) of a display on which an input event occurs at a point in time at which the expanded screen  510  transmitted by the source device  300  is minimized, and may process the input event based on the focused screen. If the type of input event is a mouse input event, the target sink device  400  may generate a new overlay mouse icon corresponding to an input event in a position in which a last mouse input event is processed at a point in time at which the screen  510  is minimized, that is, a point in time at which a mode change event occurs. The target sink device  400  may update a position of the overlay mouse icon according to a variation in a position of a second input event that occurs after the last mouse input event. 
     In this example, a resolution of the expanded screen  510  transmitted by the source device  300  and a resolution of the target sink device  400  may be different from each other. For example, when the resolution of the expanded screen  510  and the resolution of the target sink device  400  are different from each other, the source device  300  may receive the resolution of the sink device  400  itself from the sink device  400  and change a resolution of the first screen of the display connected to the source device  300  to match a resolution of the second screen of the display connected to the target sink device  400 , to prevent a malfunction due to movement coordinates of a mouse corresponding to the second input event. If the resolution of the expanded screen  510  and the resolution of the target sink device  400  are different from each other, the source device  300  may determine coordinates of a point corresponding to an input event based on the resolution of the target sink device  400 . The source device  300  may transmit the coordinates of the point corresponding to the input event to the target sink device  400 , so that the target sink device  400  may display an input object corresponding to the input event. 
     According to an example embodiment, only a portion of the first screen of the source device  300  may be mirrored to the second screen of the target sink device  400 . Here, the “mirroring of only a portion of the first screen of the source device  300  to the second screen of the target sink device  400 ” may include, for example, mirroring only a video portion in an upper portion of a YouTube screen image displayed on the source device  300 , instead of a video list in a lower portion, or determining a region of interest (ROI) on a screen displayed on the source device  300  and mirroring only the ROI. However, the example embodiments are not limited thereto. In this example, the source device  300  may also change the resolution of the second screen of the target sink device  400  to match a resolution of a portion of the first screen of the source device  300 . 
     If the display mode is changed from the expansion mode to the minimization mode, a user may view a movement of a cursor of the mouse  605 ,  1230  corresponding to the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  operating on the expanded screen  520 ,  530  without a change, and thus an effect of screen expansion may be maintained without a change. In addition, a movement of the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  by the user in the target sink device  400  may be displayed to the user as if the user views the movement. However, actually, the source device  300  may receive an input event (i.e., the first input event) of the first input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  generated in the target sink device  400  and may transmit the input event back to the target sink device  400 . 
     If the second input event is received, the target sink device  400  may focus on coordinates of a display corresponding to a position in which the input event is last processed at a minimization point in time at which the expanded screen  510  transmitted by the source device  300  is changed to the second screen  540 ,  550 , that is, a point in time at which a mode changes, and may process the second input event based on the focused coordinates. For example, when a mouse input event is last processed on the expanded screen  520 ,  530 , the target sink device  400  may generate a new overlay mouse icon in a position where the mouse input event is last processed on the second screen  540 ,  550 , and may change a position of the overlay mouse icon based on a variation in a position of the second input event according to a result of processing a new second input event. 
       FIG.  5 C  illustrates configurations of the screens  560  and  570  (e.g., the screen  740  of  FIG.  7 B ) displayed on the display of the target sink device  400  in a reduction mode according to an example embodiment. 
     In the reduction mode, the expanded screen  510  transmitted by the source device  300  may be reduced and overlaid on a portion of the screen  560 ,  570  as shown in the reduced screen  563 ,  573 . In addition, since the reduced screen  563 ,  573  is overlaid on the second screen  565 ,  575  that is the screen of the target sink device  400 , the second screen  565 ,  575  may be displayed on an outside area of the reduced screen  563 ,  573 . For example, the reduced screen  563 ,  573  may be reduced to a size set by a user and displayed in a pop-up window. 
     A scheme of processing an input event continuously occurring in the reduced screen  563 ,  573 , generated by reducing the expanded screen  510  transmitted by the source device  300 , and the second screen  565 ,  575  that is the screen of the target sink device  400  in the screen  560 ,  570  in the reduction mode, will be described below. 
     As described above with reference to  FIG.  5 B , the target sink device  400  may focus on a screen (e.g., the first screen displayed on the display of the source device, or the second screen displayed on the display of the sink device) displayed on a display corresponding to a position in which a last input event is processed at an occurrence time of a mode change event. The target sink device  400  may generate an overlay mouse icon at position coordinates of an input event last processed on a screen of a corresponding display. Here, the source device  300  may transmit the expanded screen  510 , on which an image (e.g., a mouse overlay image) of an input object overlaid on the expanded screen  510  transmitted by the source device  300  is not overlaid, to the target sink device  400 , to prevent a mouse icon generated by the target sink device  400  on the second screen  565 ,  575  from overlapping the reduced screen  563 ,  573 . 
     The source device  300  may receive the resolution of the target sink device  400  itself from the target sink device  400  and change the resolution of the first screen of the display connected to the source device  300  to match the resolution of the second screen of the target sink device  400 , so that a user may still perceive one display as being connected. 
     For example, when an input event occurs on the second screen  565 ,  575  that is a screen of the target sink device  400  in the screen  560 ,  570 , the target sink device  400  may focus on a display corresponding to a position in which the input event is last processed at a point in time at which the expanded screen  510  is minimized, as described above with reference to  FIG.  5 B , and may operate based on the focused display. When the type of the input event is a mouse input event, the target sink device  400  may generate a new overlay mouse icon corresponding to the input event in a position in which the last input event is processed at a point in time at which the expanded screen  510  is minimized, that is, the occurrence time of the mode change event. The target sink device  400  may update a position of the overlay mouse icon according to a variation in a position of the input event. 
     Here, the resolution of the expanded screen  510  and the resolution of the target sink device  400  may be different from each other. If the resolution of the expanded screen  510  and the resolution of the target sink device  400  are different from each other, the source device  300  may receive the resolution of the target sink device  400  itself from the target sink device  400  and determine coordinates of a point corresponding to the input event based on the resolution of the target sink device  400 . The source device  300  may transmit the coordinates of the point corresponding to the input event to the target sink device  400  so that the target sink device  400  may display an input object corresponding to the input event, to prevent a malfunction due to movement coordinates of the mouse  605 ,  1230  corresponding to the input event. 
     If an input event occurs on an inside area of the reduced screen  563 ,  573  in the screen  560 ,  570 , the target sink device  400  may retransmit the input event to the source device  300  through a UIBC, instead of directly processing the input event occurring on the inside area of the reduced screen  563 ,  573 . If the input event is received through the UIBC, the source device  300  may process the input event for the expanded screen  510 . In addition, for coordinate transformation of the input event occurring on the reduced screen  563 ,  573 , the target sink device  400  may transmit information including coordinates of the input event based on the reduced screen  563 ,  573  and the resolution of the reduced screen  563 ,  573  to the source device  300 . The source device  300  may process the input event for the expanded screen  510  based on the received resolution of the reduced screen  563 ,  573 . 
     The source device  300  may change a processing scheme for the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  for each display mode of the target sink device  400 . The source device  300  may focus on a screen on which the last input event occurs in the expanded screen  510  of the target sink device  400  and transmit the input event to the target sink device  400  including the focused screen. 
       FIGS.  6 A and  6 B  are diagrams illustrating examples of an operation performed when a focused screen is changed by an input device connected to a source device according to example embodiments.  FIG.  6 A  illustrates an example in which a screen focused by the mouse  605  (e.g., the mouse  1230  in  FIG.  12   ) among input devices, for example, the mouse  605  and the keyboard  607 , connected to a source device  610  (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , and/or the source device  300  of  FIG.  3   ) according to an example embodiment is changed from a first screen of the source device  610  to a second screen of a sink device  630  (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , and/or the sink device  400  of  FIG.  4   ). 
     When a position pointed to by a cursor of the mouse  605  is changed from the first screen of the source device  610  to the second screen of the sink device  630 , the source device  610  may transmit a screen on which a cursor icon  615  corresponding to the mouse  605  that is overlaid on an expanded screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , and/or the expanded screen  720  of  FIG.  7 A ) is not overlaid to the sink device  400 , and may transmit a control signal to display a cursor corresponding to the mouse  605  on the second screen of the sink device  630  to the sink device  630  by the second scheme. Accordingly, the cursor icon  615  displayed on the first screen of the source device  610  may disappear, and a cursor icon  635  may be displayed on the second screen of the sink device  630 . 
     For example, if the cursor of the mouse  605  on the second screen of the sink device  630  moves back to the first screen of the source device  610 , the sink device  630  may transmit position coordinates of the cursor of the mouse  605  moved from the second screen of the sink device  630  to the source device  610 . In this example, the source device  610  may display a cursor icon corresponding to the mouse  605  again on the first screen of the source device  610 , based on the position coordinates received from the sink device  630  according to the first scheme. 
       FIG.  6 B  illustrates an example in which a screen focused by the cursor of the mouse  605  connected to the source device  610  according to an example embodiment is changed to the outside area  653  of a reduced screen (e.g., the reduced screens  563  and  573  of  FIG.  5 C , and the reduced screen  745  of  FIG.  7 B ) displayed on the second screen of the sink device  650  or the inside area  655  of the reduced screen  563 ,  573 ,  745 . In this example, the display mode of the sink device  650  may be the reduction mode, and accordingly the display of the sink device  650  may display a screen (e.g., the screens  560  and  570  in  FIG.  5 C , and the screen  740  of  FIG.  7 B ) including the reduced screen  563 ,  573 ,  745 . 
     In an example, when the cursor of the mouse  605  is located on the inside area  655  of the reduced screen  563 ,  573 ,  745 , the source device  610  may transmit a mouse input event occurring at a position of the cursor of the mouse  605  to the sink device  650  and may transmit a control signal to allow the sink device  650  to display an overlay mouse icon, according to the second scheme. 
     Although not shown in the drawings, for example, when the display mode of the sink device  650  is the minimization mode and when the screen focused by the cursor of the mouse  605  is the second screen of the sink device  650 , the source device  610  may also transmit the control signal to allow the sink device  650  to display the overlay mouse icon to the sink device  650 . 
     In another example, when the cursor of the mouse  605  is located on the inside area  655  of the reduced screen  563 ,  573 ,  745 , the sink device  650  may inform the source device  610  of position coordinates of a point of the inside area  655  of the reduced screen  563 ,  573 ,  745  at which an input event is generated by the mouse  605 . In this example, since the reduced screen  563 ,  573 ,  745  is generated by reducing an expanded screen (e.g., the expanded screen  510  of  FIG.  5 A ) generated by the source device  610 , the source device  610  may transform the position coordinates in the inside area  655  of the reduced screen  563 ,  573 ,  745 , received from the sink device  650 , to position coordinates of the expanded screen  520 ,  530 ,  720 , and may display the input event on the expanded screen  520 ,  530 ,  720 . 
     Table 1 shows a device for controlling a cursor for each display mode, a device for controlling a movement and click of a mouse according to a currently focused screen, and a used processing scheme according to an example embodiment. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Display 
                 Cursor 
                 Focused 
                 Mouse movement 
                 Processing 
               
               
                 mode 
                 control 
                 screen 
                 and click control 
                 scheme 
               
               
                   
               
             
            
               
                 Expansion 
                 Source 
                 Expanded 
                 Source device 
                 First 
               
               
                 mode 
                 device 
                 screen 
                   
                 scheme 
               
               
                 Reduction 
                 Sink 
                 Inside 
                 Sink device 
                 First 
               
               
                 mode 
                 device 
                 area of 
                 transmits 
                 scheme 
               
               
                   
                   
                 reduced 
                 coordinates to 
               
               
                   
                   
                 scree 
                 source device 
               
               
                   
                   
                 Outside 
                 Source device 
                 Second 
               
               
                   
                   
                 area of 
                 transmits control 
                 scheme 
               
               
                   
                   
                 reduced 
                 signal to sink device 
               
               
                   
                   
                 scree 
               
               
                 Minimization 
                 Sink 
                 Screen of 
                 Source device 
                 Second 
               
               
                 mode 
                 device 
                 sink device 
                 transmits control 
                 scheme 
               
               
                   
                   
                   
                 signal to sink 
               
               
                   
                   
                   
                 device 
               
               
                   
               
            
           
         
       
     
     In Table 1, the display mode may be changed from the expansion mode to the reduction mode or the minimization mode, and accordingly the processing scheme may also be changed from the first scheme to the second scheme, so that coordinates may be transformed. 
     According to an example embodiment, when the second screen of the sink device  630 ,  650  is focused by an input device (e.g., the mouse  605 ) connected to the source device  610 , the source device  610  may continue to transmit a control signal associated with an input event occurring on the second screen of the sink device  630 ,  650  to the sink device  630 ,  650 , to maintain the feeling of use of the input device  605  without interruption. 
       FIGS.  7 A and  7 B  are diagrams illustrating examples of an operation of a source device and an operation of a sink device when a display mode of the sink device is changed according to example embodiments. Referring to  FIG.  7 A , a display mode of a sink device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the sink device  400  of  FIG.  4   , and/or the sink devices  630  and  650  of  FIGS.  6 A and  6 B ) may be changed from an expansion mode of displaying the expanded screen  510  generated and transmitted by the source device  710  (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the source device  300  of  FIG.  3   , and/or the source device  610  of  FIGS.  6 A and  6 B ) without a change to a minimization mode of displaying the second screen  730  (e.g., the second screens  540  and  550  of  FIG.  5 B ) of the sink device  630 , instead of the expanded screen  720 . 
     In an example, when the display mode of the sink device  630  is changed from the expansion mode to the minimization mode, the source device  710  may stop generating and transmitting the expanded screen  720 , and accordingly the second screen  730  of the sink device  630 , instead of the expanded screen  720 , may be displayed on the display of the sink device  630 . In this example, an input event occurring on the expanded screen  720  may be processed in a position of the second screen  730  of the sink device  630  corresponding to a position in which the input event occurs on the expanded screen  720 , even though the input event disappears from the expanded screen  720  and is invisible in the minimization mode. 
     The sink device  630  may transmit information associated with the input event to be processed on the second screen  730  of the sink device  630  to the source device  710 . The sink device  630  may process the input event in response to the control signal being received again from the source device  710 . The sink device  630  may focus on a position in which a last input event occurs at a point in time at which the expanded screen  720  is minimized, and process the input event based on the focused position. For example, when the input event is a mouse input event, the sink device  630  may generate a new overlay mouse icon. The sink device  630  may move and display the overlay mouse icon based on a coordinate value changed according to a movement of the mouse input event. 
     In an example, when the display mode of the sink device  630  is changed from the expansion mode to the minimization mode, a resolution of the expanded screen  720  displayed in the expansion mode and a resolution of the sink device  630  that displays the second screen  730  of the sink device  630  in the minimization mode may be different from each other. In this example, the source device  710  may determine coordinates of a point corresponding to the input event based on the resolution of the sink device  630 , and may transmit the coordinates of the point corresponding to the input event to the sink device  630  so that the sink device  630  may display an input object corresponding to the input event. Thus, it may be possible to naturally change screens. 
     Referring to  FIG.  7 B , the display mode of the sink device  630  according to an example embodiment may be changed from the expansion mode of displaying the expanded screen  720  generated by the source device  710  to a reduction mode of displaying the screen  740  (e.g., the screens  560  and  570  of  FIG.  5 C ) including the reduced screen  745  generated by reducing the expanded screen  720 . 
     If the display mode of the sink device  630  is changed from the expansion mode of displaying the expanded screen  720  to the reduction mode of displaying the screen  740  including the reduced screen  745 , the source device  710  may determine a processing scheme based on a point at which an input event occurs on the screen  740 . In an example, when an input event occurs in an inside area of the reduced screen  745  included in the screen  740 , the source device  710  may transform coordinates received from the sink device  630  according to the first scheme to coordinates of the expanded screen  720  and may display the input event. In another example, when an input event occurs in an outside area of the reduced screen  745  included in the screen  740 , the source device  710  may transmit coordinates of a point corresponding to the input event, together with a control signal to allow the sink device  630  to display an input object corresponding to the input event, to the sink device  630  according to the second scheme. For example, when the input event is a mouse input event, the source device  710  may transmit coordinate information of a cursor moved in response to the mouse input event, together with the control signal, to the sink device  630 . 
     If the display mode is changed from the expansion mode to the reduction mode, the sink device  630  may switch an area in which an input event is to be processed from the expanded screen  720  to the screen  740  including the reduced screen  745 , based on an occurrence time of a mode change event in which the display mode is changed. If the display mode is changed from the expansion mode to the reduction mode in a state in which a mouse icon is located on the expanded screen  720 , the sink device  630  may switch an area in which an input event is to be processed from the expanded screen  720  to an area of the screen  740  in which an input event occurs. In an example, when an inside area of the reduced screen  745  overlaid on a lower left end of the screen  740  is focused by the first input device connected to the source device  710 , the sink device  630  may process a first input event on the reduced screen  745 . In another example, when an area of the screen  740  other than the reduced screen  745  is focused by the first input device connected to the source device  710 , the sink device may process the first input event on the area of the screen  740  other than the screen  745 . 
       FIG.  8    is a flowchart illustrating an example of a method of operating a source device according to an example embodiment. In the following examples, operations may be performed sequentially, but need not necessarily be performed sequentially. For example, the order of the operations may be changed and/or at least two of the operations may be performed in parallel. 
       FIG.  8    illustrates a method of operating a source device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the source device  300  of  FIG.  3   , the source device  610  of  FIGS.  6 A and  6 B , and/or the source device  710  of  FIGS.  7 A and  7 B ) that shares an expanded screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , and/or the expanded screen  720  of  FIG.  7 A ) with at least one sink device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the sink device  400  of  FIG.  4    and/or the sink devices  630  and  650  of  FIGS.  6 A and  6 B ) according to an example embodiment. 
     In operation  810 , the source device  300  may transmit the expanded screen  520 ,  530 ,  720 , generated by the source device  300  to be displayed on the sink device  400  connected to the source device  300 , to the sink device  400 . Here, the expanded screen  520 ,  530 ,  720  may be a screen that may be displayed on the display of the sink device  400  in association with the first screen displayed on the display of the source device  300  to expand the task space of the source device  300 . The source device  300  may recognize a connection state between the source device  300  and the sink device  101 ,  102 ,  104 ,  400 ,  630 ,  650  through wireless communication, and transmit the expanded screen  520 ,  530 ,  720  to the sink device  400  of which the connection state is recognized. 
     In operation  820 , the source device  300  may identify a screen focused by an input device (e.g., the input module  150  of  FIG.  1   , the mouse  605  and the keyboard  607  of  FIG.  6 A , the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and/or the touch screen  1240  of  FIG.  12   ) connected to the source device  300  among a first screen displayed on the display of the source device  300  and a second screen displayed on the display of the sink device  400  (e.g., the expanded screens  520  and  530  of  FIG.  5 A , the second screens  540  and  550  of  FIG.  5 B , the screens  560  and  570  of  FIG.  5 C , the expanded screen  720  and the second screen  730  of  FIG.  7 A , and/or the screen  740  of  FIG.  7 B ). 
     In operation  830 , when the focused screen identified in operation  820  is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  400 , the source device  300  may switch a processing scheme of processing an input event generated by the input device  605  to a first scheme of allowing the source device  300  to display an input event, or a second scheme by which the source device  300  transmits a control signal to allow the sink device  400  to display an input event, based on the display mode of the sink device  400 . 
       FIG.  9    is a flowchart illustrating another example of a method of operating a source device according to an example embodiment. In the following examples, operations may be performed sequentially, but need not necessarily be performed sequentially. For example, the order of the operations may be changed and at least two of the operations may be performed in parallel. 
     Referring to  FIG.  9   , a source device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the source device  300  of  FIG.  3   , and the source device  610  of  FIGS.  6 A and  6 B , and/or the source device  710  of  FIG.  7 A ) according to an example embodiment may update an expanded screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , and/or the expanded screen  720  of  FIG.  7 B ), or a reduced screen (e.g., the reduced screens  563  and  573  of  FIG.  5 C , and/or the reduced screen  745  of  FIG.  7 B ) through operations  905  to  975 . 
     In operation  905 , the source device  300  may receive an input event from an input device (e.g., the input module  150  of  FIG.  1   , the mouse  605  and the keyboard  607  of  FIGS.  6 A and  6 B , and the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and/or the touch screen  1240  of  FIG.  12   ) connected to the source device  300 . If the input event is received, the source device  300  may recognize a connection state between the source device  300  and each of sink devices (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the sink device  400  of  FIG.  4   , the sink device  630  of  FIG.  6 A , and/or the sink device  650  of  FIG.  6 B ), and receive display modes of the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . In addition, the source device  300  may receive a display mode of a sink device (e.g., a target sink device) corresponding to the input event received in operation  905  among the sink devices  101 ,  102 ,  104 ,  400 ,  630 , and  650 . 
     In operation  910 , the source device  300  may determine whether the display mode is an expansion mode. 
     In an example, if it is determined in operation  910  that the display mode is the expansion mode, the source device  300  may directly process the input event in operation  915 , and may transmit the input event to the target sink device  400  in operation  920 . In this example, the source device  300  may transmit coordinate information corresponding to a point at which the input event occurs to the target sink device  400  together with the input event. 
     In operation  925 , the source device  300  may update the expanded screen  520 ,  530 ,  720  shared by the sink device  400  by reflecting a result of processing the input event. 
     In operation  930 , the source device  300  may determine whether setting of the second screen to share the expanded screen  520 ,  530 ,  720  with the sink device  400  is finished. If it is determined that the setting of the second screen is not finished, the source device  300  may reperform operation  905 . If it is determined that the setting of the second screen is finished, the source device  300  may terminate the operation. 
     If it is determined in operation  910  that the display mode is not the expansion mode, the source device  300  may remove an overlaid mouse icon from the expanded screen  520 ,  530 ,  720  in operation  940 . For example, when the display mode is a minimization mode or a reduction mode, the source device  300  may transmit a screen from which a mouse icon overlaid on the expanded screen  520 ,  530 ,  720  is removed, that is, a screen on which a mouse icon is not overlaid to the sink device  400 , so that a mouse icon generated by the sink device  400  and a mouse icon displayed on the expanded screen  520 ,  530 ,  720  do not overlap each other on a screen of the sink device  400 . 
     In operation  945 , the source device  300  may determine whether the display mode is the minimization mode. If it is determined in operation  945  that the display mode is the minimization mode, the source device  300  may transmit the input event to the sink device  400  in operation  950 , and may perform operation  930 . 
     If it is determined in operation  945  that the display mode is not the minimization mode, the source device  300  may determine whether the display mode is the reduction (PIP) mode in operation  955 . If it is determined in operation  955  that the display mode is not the reduction mode, the source device  300  may redetermine whether the display mode is the expansion mode in operation  910 . 
     If it is determined in operation  955  that the display mode is the reduction mode, the source device  300  may transmit the input event to the sink device  400  in operation  960 . If it is determined in operation  955  that the display mode is not the reduction mode, the process returns to operation  910 . 
     Subsequently, in operation  965 , the source device  300  may determine whether an input event (i.e., a UIBC event) transmitted through a UIBC is received from the sink device  400 . 
     If it is determined in operation  965  that the UIBC event is received, the source device  300  may process the UIBC event in operation  970 . The source device  300  may update the expanded screen  520 ,  530 ,  720  by reflecting a result of processing the UIBC event in operation  975 . If the expanded screen  520 ,  530 ,  720  is updated, a reduced screen displayed on a PIP area may also be updated. 
     Alternatively, if it is determined in operation  965  that the UIBC event is not received, the source device  300  may update the expanded screen  520 ,  530 ,  720  in operation  975 . In operation  975 , the source device  300  may reflect the result of processing the input event in operation  915  and/or the expanded screen  520 ,  530 ,  720  updated in operation  925 . 
     When the expanded screen  520 ,  530 ,  720  is updated in operation  925 , the source device  300  may determine whether the setting of the second screen to share the expanded screen  520 ,  530 ,  720  with the sink device  400  is finished in operation  930 . If it is determined that the setting of the second screen is not finished, the source device  300  may reperform operation  905 . If it is determined that the setting of the second screen is finished, the source device  300  may terminate the operation. 
       FIG.  10    is a flowchart illustrating an example of a method of operating a sink device according to an example embodiment. In the following examples, operations may be performed sequentially, but need not necessarily be performed sequentially. For example, the order of the operations may be changed and at least two of the operations may be performed in parallel. 
       FIG.  10    illustrates a method of operating a sink device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the sink device  400  of  FIG.  4   , and/or the sink devices  630  and  650  of  FIGS.  6 A and  6 B ) that shares an expanded screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , and/or the expanded screen  720  of  FIGS.  7 A and  7 B ) generated and transmitted by a source device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the source device  300  of  FIG.  3   , the source device  610  of  FIGS.  6 A and  6 B , and/or the source device  710  of  FIGS.  7 A and  7 B ) according to an example embodiment. 
     In operation  1010 , the sink device  400  may receive the extended screen  520 ,  530 ,  720 , generated by the source device  300  to be displayed on the sink device  400 , from the source device  300 . The expanded screen  520 ,  530 ,  720  may be a screen that may be displayed on the display of the sink device  400  in association with the first screen displayed on the display of the source device  300  to expand the task space of the source device  300 . 
     In operation  1020 , the sink device  400  may identify a display mode of the sink device  400 . The display mode of the sink device  400  may be changed by, for example, a user setting or an application setting. 
     In operation  1030 , the sink device  400  may display an input event generated by an input device (e.g., the input module  150  of  FIG.  1   , the mouse  605  and the keyboard  607  of  FIG.  6 A , and the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and/or the touch screen  1240  of  FIG.  12   ) connected to the source device  300  on one of the expanded screen  520 ,  530 ,  720 , the second screen  540 ,  550 ,  730  of the sink device  400 , and a reduced screen (e.g., the reduced screens  563  and  573  of  FIG.  5 C , and the reduced screen  745  of  FIG.  7 B ) generated by reducing the expanded screen  520 ,  530 ,  720 , based on the display mode and a processing scheme switched in the source device  300  based on the display mode, when a screen focused by the input device is the second screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , the second screens  540  and  550  of  FIG.  5 B , the screens  560  and  570  of  FIG.  5 C , the expanded screen  720  and the second screen  730  of  FIG.  7 A , and/or the screen  740  of  FIG.  7 B ) of the sink device  400  among a first screen of the source device  300  and the second screen of the sink device  400 . Here, the expanded screen  520 ,  530 ,  720  may be a screen displayed when the display mode of the sink device  400  is an expansion mode. The second screen  540 ,  550 ,  730  of the sink device  400  may be screens displayed when the display mode of the sink device  400  is a minimization mode. The reduced screen  563 ,  573 ,  745  may be a screen displayed when the display mode of the sink device  400  is a reduction mode. 
       FIG.  11    is a flowchart illustrating another example of a method of operating a sink device according to an example embodiment. In the following examples, operations may be performed sequentially, but need not necessarily be performed sequentially. For example, the order of the operations may be changed and at least two of the operations may be performed in parallel. 
       FIG.  11    illustrates a method of operating a sink device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the sink device  400  of  FIG.  4   , and/or the sink devices  630  and  650  of  FIGS.  6 A and  6 B ) according to an example embodiment. 
     In operation  1105 , the sink device  400  may receive an input event from a source device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the source device  300  of  FIG.  3   , the source device  610  of  FIGS.  6 A and  6 B , and/or the source device  710  of  FIGS.  7 A and  7 B ). The input event received in operation  1105  may correspond to, for example, the input event transmitted by the source device  300  in operation  920 ,  950 , or  960  of  FIG.  9   . 
     In operation  1110 , the sink device  400  may transmit a current display mode to the source device  300 . 
     In operation  1115 , the sink device  400  may determine whether the display mode is the expansion mode. If it is determined in operation  1115  that the display mode is the expansion mode, the sink device  400  may store coordinate information of a current input event occurring on the expanded screen (e.g., the expanded screens  520  and  530  of  FIG.  5 A , and the expanded screen  720  of  FIGS.  7 A and  7 B ) in operation  1120 . 
     In operation  1125 , the sink device  400  may determine whether setting of the second screen is finished. If it is determined that the setting of the second screen is not finished, the sink device  400  may reperform operation  1105 . If it is determined that the setting of the second screen is finished, the sink device  400  may terminate the operation. 
     If it is determined in operation  1115  that the display mode is not the expansion mode, the sink device  400  may generate an overlay mouse icon in operation  1130 . If the display mode is not the expansion mode, the sink device  400  may generate an overlay mouse icon based on coordinates in a focused display. In addition, the source device  300  may remove a mouse icon from the expanded screen  520 ,  530 ,  720  as in operation  940  described above with reference to  FIG.  9   , to prevent a mouse icon from being further generated. 
     When the overlay mouse icon is generated, the sink device  400  may determine whether the display mode is the minimization mode in operation  1135 . If it is determined in operation  1135  that the display mode is the minimization mode, the sink device  400  may directly process the input event in operation  1140 . 
     The sink device  400  may update the overlay mouse icon in operation  1145  when coordinates need to be updated by reflecting a result of processing the input event in operation  1140 . The sink device  400  may perform operation  1125  after updating the overlay mouse icon. 
     If it is determined in operation  1135  that the display mode is not the minimization mode, the sink device  400  may determine whether the display mode is a reduction (PIP) mode in operation  1150 . 
     If it is determined in operation  1150  that the display mode is not the reduction mode, the sink device  400  may redetermine whether the display mode is the expansion mode in operation  1115 . 
     If it is determined in operation  1150  that the display mode is the reduction mode, the sink device  400  may determine whether a current PIP area is focused, that is, whether an inside area of a reduced screen (e.g., the reduced screens  563  and  573  of  FIG.  5 C , and the reduced screen  745  of  FIG.  7 B ) is focused in operation  1155 . 
     If it is determined in operation  1155  that the PIP area is not focused, that is, an area outside the PIP area is focused, the sink device  400  may process the input event in the same manner as in the minimize mode in operation  1140 . 
     Alternatively, if it is determined in operation  1155  that the PIP region is focused, the sink device  400  may transform coordinates of the input event based on a resolution of the PIP area in operation  1160 . In operation  1165 , the sink device  400  may transmit the input event (i.e., a UIBC event) with the transformed coordinates to the source device  300  through a UIBC in operation  1160 . If the UIBC event is received from the sink device  400 , the source device  300  may process the UIBC event and update the expanded screen  520 ,  530 ,  720 . 
       FIG.  12    is a diagram illustrating an input device according to an example embodiment.  FIG.  12    illustrates various input devices (e.g., the input module  150  of  FIG.  1   , the mouse  605  and the keyboard  607  of  FIGS.  6 A and  6 B , and the keyboard  1210 , the wearable device  1220 , the mouse  1230 , and/or the touch screen  1240  of  FIG.  12   ) according to an example embodiment. 
     The screen focused on a display may be changed or moved through an input event generated by an input device  1210 ,  1220 ,  1230 ,  1240  connected to the source device  300  (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , and the source device  710  of  FIGS.  7 A and  7 B ) or at least one sink device (e.g., the electronic devices  101 ,  102 , and  104  of  FIG.  1   , the sink device  400  of  FIG.  4   , and/or the sink device  630  of  FIGS.  6 A and  6 B ). The input event may be of various types, for example, a voice input through a microphone input device, a gaze movement in the wearable device  1220  such as smart glasses, or the touch input  1250  to the touch screen  1240  in addition to a key input to the keyboard  1210 , an input (e.g., clicking or dragging) of the mouse  1230 . Various types of input events may enable a focus to move in a display. 
     The source device  300  may change a screen resolution of a display connected to the source device  300  to the resolution of the target sink device  400  so that a user may recognize that one display is still connected. 
     The example embodiments described herein may be implemented using a hardware component, a software component and/or a combination thereof. A processing device may be implemented using one or more general-purpose or special-purpose computers, such as, for example, a processor, a controller and an arithmetic logic unit (ALU), a digital signal processor (DSP), a microcomputer, an FPGA, a programmable logic unit (PLU), a microprocessor or any other device capable of responding to and executing instructions in a defined manner. The processing device may run an OS and one or more software applications that run on the OS. The processing device also may access, store, manipulate, process, and create data in response to execution of the software. For purpose of simplicity, the description of a processing device is used as singular; however, one skilled in the art will appreciate that a processing device may include multiple processing elements and multiple types of processing elements. For example, the processing device may include a plurality of processors, or a single processor and a single controller. In addition, different processing configurations are possible, such as parallel processors. 
     The software may include a computer program, a piece of code, an instruction, or some combination thereof, to independently or uniformly instruct or configure the processing device to operate as desired. Software and data may be embodied permanently or temporarily in any type of machine, component, physical or virtual equipment, computer storage medium or device, or in a propagated signal wave capable of providing instructions or data to or being interpreted by the processing device. The software also may be distributed over network-coupled computer systems so that the software is stored and executed in a distributed fashion. The software and data may be stored by one or more non-transitory computer-readable recording mediums. 
     The methods according to the above-described example embodiments may be recorded in non-transitory computer-readable media including program instructions to implement various operations of the above-described example embodiments. The media may also include, alone or in combination with the program instructions, data files, data structures, and the like. The program instructions recorded on the media may be those specially designed and constructed for the purposes of example embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of non-transitory computer-readable media include magnetic media such as hard disks, floppy disks, and magnetic tape; optical media such as CD-ROM discs, DVDs, and/or Blue-ray discs; magneto-optical media such as optical discs; and hardware devices that are specially configured to store and perform program instructions, such as read-only memory (ROM), random access memory (RAM), flash memory (e.g., USB flash drives, memory cards, memory sticks, etc.), and the like. Examples of program instructions include both machine code, such as produced by a compiler, and files containing higher-level code that may be executed by the computer using an interpreter. 
     The above-described devices may be configured to act as one or more software modules in order to perform the operations of the above-described example embodiments, or vice versa. 
     As described above, although the example embodiments have been described with reference to the limited drawings, a person skilled in the art may apply various technical modifications and variations based thereon. For example, suitable results may be achieved if the described techniques are performed in a different order and/or if components in a described system, architecture, device, or circuit are combined in a different manner and/or replaced or supplemented by other components or their equivalents. 
     Therefore, the scope of the disclosure is defined not by the detailed description, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are to be construed as being included in the disclosure. 
     According to an example embodiment, a source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  may include a wireless communication module  192 ,  310  (e.g., including wireless communication circuitry), a memory  130 ,  330 , and a processor  120 ,  340  (e.g., including processing circuitry). The processor  120 ,  340  may be configured to transmit an expanded screen  520 ,  530 ,  720 , generated by the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to be displayed on a sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  through the wireless communication module  192 ,  310 , the expanded screen  520 ,  530 ,  720  being a screen displayed on a display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  in association with a first screen displayed on a display of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to expand a task space of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , to identify a screen focused by an input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  among the first screen displayed on the display of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  and a second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  displayed on the display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and to switch a processing scheme to process an input event generated by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240 , based on at least one of a display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  or whether the focused screen is the first screen of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  or the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 . 
     According to an example embodiment, when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  and when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is a reduction mode or a minimization mode, the processor  120 ,  340  may be configured to switch the processing scheme from a first scheme of allowing the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to display the input event to a second scheme by which the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  transmits a control signal to allow the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to display the input event to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 . 
     According to an example embodiment, when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is changed from an expansion mode of displaying the expanded screen  520 ,  530 ,  720  to a reduction mode of displaying a reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720 , or a minimization mode of displaying the second screen  540 ,  550 ,  730  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  instead of the expanded screen  520 ,  530 ,  720  and when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , or when the focused screen is changed from the first screen of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  and when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is changed to the reduction mode or the minimization mode, the processor  120 ,  340  may be configured to switch the processing scheme from the first scheme to the second scheme. 
     According to an example embodiment, when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is the reduction mode and when a point at which the input event occurs is an inside area  655  of the reduced screen  563 ,  573 ,  745 , the processor  120 ,  340  may be configured to receive, from the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , position information of the point at which the input event occurs on the inside area  655  of the reduced screen  563 ,  573 ,  745 , and update the expanded screen  520 ,  530 ,  720  based on the position information. 
     According to an example embodiment, the processor  120 ,  340  may be configured to update at least one of the reduced screen  563 ,  573 ,  745  or the expanded screen  520 ,  530 ,  720  by converting position information of a point at which the input event occurs according to a resolution of the reduced screen  563 ,  573 ,  745 , received from the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , to match a resolution of a screen of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 . 
     According to an example embodiment, when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is the reduction mode, and a point at which the input event occurs is an outside area  653  of the reduced screen  563 ,  573 ,  745 , the processor  120 ,  340  may be configured to allow the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to display an input object corresponding to the input event by transmitting coordinates of a point corresponding to the input event to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  according to the second scheme. 
     According to an example embodiment, when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is the minimization mode and when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , if a resolution of the expanded screen  520 ,  530 ,  720  and a resolution of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  are different from each other, the processor  120 ,  340  may be configured to determine coordinates of a point corresponding to the input event based on the resolution of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , transmit the coordinates of the point corresponding to the input event to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and allow the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to display the input object corresponding to the input event. 
     According to an example embodiment, when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is changed from the expansion mode to the minimization mode and when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , if the resolution of the expanded screen  520 ,  530 ,  720  and the resolution of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  are different from each other, the processor  120 ,  340  may be configured to determine coordinates of a point corresponding to the input event based on the resolution of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , transmit the coordinates of the point corresponding to the input event to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and allow the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to display the input object corresponding to the input event. 
     According to an example embodiment, the input event may include a mouse input event. When the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is the reduction mode or the minimization mode, and when the input event is the mouse input event, the processor  120 ,  340  may be configured to transmit, to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , a control signal to allow the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to display a cursor moved in response to the mouse input event, together with coordinate information of the cursor, according to the second scheme. 
     According to an example embodiment, when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is the reduction mode or the minimization mode, and when the focused screen corresponding to a screen on which a last input event is generated by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , the processor  120 ,  340  may transmit, to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , the reduced screen  563 ,  573 ,  745  on which an image of an input object that is previously overlaid on the expanded screen  520 ,  530 ,  720  is not overlaid. 
     According to an example embodiment, a sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  may include a wireless communication module  192 ,  410 , a display module  160 ,  420 , a memory  130 ,  430 , and a processor  120 ,  440 . The processor  120 ,  440  may be configured to receive an expanded screen  520 ,  530 ,  720 , generated by a source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to be displayed on the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  through the wireless communication module  192 ,  410 , the expanded screen  520 ,  530 ,  720  being a screen displayed on a display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  in association with a first screen displayed on a display of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to expand a task space of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , to identify a display mode of the display module  160 ,  420 , and to display an input event generated by an input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  on one of the expanded screen  520 ,  530 ,  720 , a second screen  540 ,  550 ,  730  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and a reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720 , according to the display mode and a processing scheme switched in the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  based on the display mode, when a screen focused by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  is a second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  displayed on the display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  among the first screen of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  and the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 . 
     According to an example embodiment, the processing scheme may include at least one of a first scheme of allowing the input event on the first screen of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , and a second scheme by which the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  transmits a control signal to allow the input event to be displayed on the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 . When the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and when the display mode is a reduction mode of displaying the reduced screen  563 ,  573 ,  745  or a minimization mode of displaying the second screen  540 ,  550 ,  730  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  instead of the expanded screen  520 ,  530 ,  720 , the processor  120 ,  440  may be configured to display the input event on the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  according to the control signal received from the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  by the second scheme. 
     According to an example embodiment, when the display mode is the reduction mode and when a point at which the input event occurs on an outside area  653  of the reduced screen  563 ,  573 ,  745 , the processor  120 ,  440  may be configured to display an input object corresponding to the input event based on coordinates of a point corresponding to the input event, received from the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  according to the second scheme. 
     According to an example embodiment, when the display mode is the reduction mode and when a point at which the input event occurs is an inside area  655  of the reduced screen  563 ,  573 ,  745 , the processor  120 ,  440  may be configured to transmit information associated with the input event occurring on the inside area  655  of the reduced screen  563 ,  573 ,  745  to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 . The information associated with the input event may include at least one of the type of the input event, a resolution of the reduced screen  563 ,  573 ,  745  on which the input event occurs, or coordinate information corresponding to the point at which the input event occurs based on the resolution of the reduced screen  563 ,  573 ,  745 . 
     According to an example embodiment, the input event may include a mouse input event. When the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is the reduction mode or the minimization mode, and when the input event is the mouse input event, the processor  120 ,  440  may be configured to display an input object corresponding to the mouse input event, based on coordinate information of a cursor moved in response to the mouse input event and a control signal to allow the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to display the cursor moved in response to the mouse input event. The coordinate information and the control signal may be received from the source device according to the second scheme. 
     According to an example embodiment, when the display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  is the reduction mode or the minimization mode, and when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , the processor  120 ,  440  may be configured to receive information associated with the input event from the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , and display the input event on the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  based on the information associated with the input event. 
     According to an example embodiment, when the display mode is the reduction mode or the minimization mode, and when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , the processor  120 ,  440  may be configured to display an input object corresponding to the input event on the focused second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 . 
     According to an example embodiment, a method of operating a source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  may include operation  810  of transmitting an expanded screen  520 ,  530 ,  720 , generated by the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to be displayed on a sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , to the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , the expanded screen  520 ,  530 ,  720  being a screen displayed on a display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  in association with a first screen displayed on a display of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to expand a task space of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , operation  820  of identifying a screen focused by an input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  among the first screen displayed on the display of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  and a second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  displayed on the display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and operation  830  of switching a processing scheme to process an input event generated by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240 , based on a display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to a first scheme of allowing the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to display the input event or a second scheme of transmitting a control signal to allow the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  to display the input event, when the focused screen is the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 . 
     According to an example embodiment, a method of operating a sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  may include operation  1010  of receiving, from a source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , an expanded screen  520 ,  530 ,  720 , generated by the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to be displayed on the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , the expanded screen  520 ,  530 ,  720  being a screen displayed on a display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  in association with a first screen displayed on a display of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  to expand a task space of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710 , operation  1020  of identifying a display mode of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and operation  1030  of displaying an input event generated by an input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  connected to the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  on one of the expanded screen  520 ,  530 ,  720 , a second screen  540 ,  550 ,  730  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 , and a reduced screen  563 ,  573 ,  745  generated by reducing the expanded screen  520 ,  530 ,  720 , according to the display mode and a processing scheme switched in the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  based on the display mode, when a screen focused by the input device  150 ,  605 ,  607 ,  1210 ,  1220 ,  1230 ,  1240  is a second screen displayed on the display of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650  among the first screen of the source device  101 ,  102 ,  104 ,  300 ,  610 ,  710  and the second screen  520 ,  530 ,  540 ,  550 ,  560 ,  570 ,  720 ,  730 ,  740  of the sink device  101 ,  102 ,  104 ,  400 ,  530 ,  650 .