Abstract: A display unit for displaying an image based on video signals and synchronization signals inputted from an externally connected video source, includes a video circuit adapted to display an image based on the video signals sent by the externally connected video source, a memory which stores an identification number for identifying the display unit, and a communication controller which sends the identification number stored in the memory to the video source. The communication controller is capable of bi-directionally communicating with the video source.

Abstract: A display unit having a processor adapted to control display of the display unit and a communication controller capable of bi-directionally communicating with a video source. The communication controller communicates information received from the video source to the processor.