SCREEN OUTPUT METHOD USING EXTERNAL DEVICE AND ELECTRONIC DEVICE FOR SUPPORTING THE SAME

The invention relates to a mobile terminal apparatus, comprising: a display configured to receive a touch input; a communication circuit; memory; and at least one processor. The mobile terminal apparatus is configured to: display a screen including a first user interface for executing a desktop mode and a second user interface for executing a screen mirroring on the display when the mobile terminal apparatus is connected to an external display device, receive a user input selecting the first user interface, executing the desktop mode in response to the user input, and while executing the desktop mode and while the mobile terminal apparatus is in communication with an external display device: configure a display screen of the mobile terminal apparatus for displaying on the external display device, and transmit data for rendering the display screen on the external display device to the external display device via the communication circuit.