A mobile device capable of communication with a head mounted display , comprising: a display ; a touch sensing module configured to receive a touch input; a communication module configured to perform data communication with the head mounted display; a video processor configured to output an image corresponding to a portion of a content to the display ; and a controller configured to: receive relative location information between the mobile device and the head mounted display from the head mounted display , create an enlarged video data corresponding to the content, which includes the image corresponding to the portion of the content outputted from the display , based on the received relative location information, control the communication module to transmit the created enlarged video data to the head mounted display so that the head mounted display outputs a virtual image corresponding to the created enlarged video data, and control a first image corresponding to a first region of the virtual image to be outputted only to the first region overlapping with the virtual image outputted by the head mounted display in a whole display region of the display based on the obtained relative location information. a display ; a touch sensing module configured to receive a touch input; a communication module configured to perform data communication with the head mounted display; a video processor configured to output an image corresponding to a portion of a content to the display ; and a controller configured to: receive relative location information between the mobile device and the head mounted display from the head mounted display , create an enlarged video data corresponding to the content, which includes the image corresponding to the portion of the content outputted from the display , based on the received relative location information, control the communication module to transmit the created enlarged video data to the head mounted display so that the head mounted display outputs a virtual image corresponding to the created enlarged video data, and control a first image corresponding to a first region of the virtual image to be outputted only to the first region overlapping with the virtual image outputted by the head mounted display in a whole display region of the display based on the obtained relative location information. receive relative location information between the mobile device and the head mounted display from the head mounted display , create an enlarged video data corresponding to the content, which includes the image corresponding to the portion of the content outputted from the display , based on the received relative location information, control the communication module to transmit the created enlarged video data to the head mounted display so that the head mounted display outputs a virtual image corresponding to the created enlarged video data, and control a first image corresponding to a first region of the virtual image to be outputted only to the first region overlapping with the virtual image outputted by the head mounted display in a whole display region of the display based on the obtained relative location information. <EOS>