Abstract: A method and device which provide and manage an image to be displayed on display screens of a portable device and a separate image output device, when the separate image output device is connected to the portable device is provided. Accordingly, an image frame is generated by excluding a specific surface from image frames to be output in the portable device, to the image output device, or constitutes and provides an image frame including a surface to be displayed on the image output device, to the image output device.

Abstract: A method for displaying state information about a service provided to an external output device through short-range wireless communication in an electronic device includes the operations of transmitting image data to an external output device, determining the occurrence or non-occurrence of an error in transmitting the image data, and displaying on a display unit the occurrence or non-occurrence of the error. An electronic device, comprising a communication unit configured to transmit and receive communication signals, a display unit configured to display and at least one processor configured to execute computer programs, wherein the processor is configured to transmit image data to an external output device using the communication system, determine the occurrence or non-occurrence of an error of the image data, and display on the display unit the occurrence or non-occurrence of the error of the image data.

Abstract: A method and device which provide and manage an image to be displayed on display screens of a portable device and a separate image output device, when the separate image output device is connected to the portable device is provided. Accordingly, an image frame is generated by excluding a specific surface from image frames to be output in the portable device, to the image output device, or constitutes and provides an image frame including a surface to be displayed on the image output device, to the image output device.