Patent ID: 8359628
Filing Date: 2013-01-22
Classification: G09G,H04L,H04N

Abstract:
1. A display device comprising: a signal receiving unit configured to receive a video signal by a differential signal through a plurality of channels from an external apparatus via a transmission path; an image display unit configured to process the video signal received in the signal receiving unit to display an image; a communicating unit configured to perform a bi-directional communication by using a predetermined line which constitutes the transmission path; a position designating unit for designating a position on a display screen of the image display unit; and an information transmitting unit configured to transmit, by the communicating unit, coordinate information on the position designated by the position designating unit to the external apparatus, wherein the predetermined line is an HDMI cable including a reserve line and an HPD line, and wherein the coordinate information is supplied to the predetermined line via an Ethernet interface and a high-speed data line interface.