Method for providing video and display apparatus thereof

PURPOSE: A method for providing an image and a display device adopting thereof are provided to determine a first resolution reproducible by all mobile devices among a plurality of resolutions, process an image to have the first resolution, and transmit the processed image to all the mobile devices. CONSTITUTION: A display device receives signals requesting images having different resolutions from each other from a plurality of mobile devices(S410). The display device determines a resolution that is reproducible by all the plurality of mobile devices among a plurality of resolutions requested from the plurality of mobile devices(S420). The display device performs signal processing on the image to be transmitted to the plurality of mobile devices(S430). The display device transmits the processed image to the plurality of mobile devices(S440). [Reference numerals] (AA) Start; (BB) End; (S410) Receive signals requesting images having different resolutions from each other from a plurality of mobile devices; (S420) Determine a resolution that is reproducible by all the plurality of mobile devices among a plurality of resolutions requested from the plurality of mobile devices; (S430) Perform signal processing on the image to be transmitted to the plurality of mobile devices; (S440) Transmit the processed image to the plurality of mobile devices