Display apparatus, source device and display system

A display apparatus that includes a display portion, an orientation detecting portion for detecting an orientation of an upper part or a lower part of a display screen of the display portion, a receiving portion for receiving an image signal transmitted from a source device, and an image processing portion, and displays an image processed by the image processing portion on the display portion, wherein

• the receiving portion receives, together with the image signal, state information showing an orientation of an upper part or a lower part of a transmission image indicated by the image signal and presence/absence of black band parts in the transmission image, and
• the image processing portion applies, to the transmission image, any one or more processings among rotation processing for rotation such that the orientation of the upper part or the lower part of the display screen coincides with the orientation of the upper part or the lower part of the transmission image received at the receiving portion, scaling processing for performing scaling so as to perform display on the display screen to a maximum extent with an aspect ratio maintained, and black-band processing for adding or removing black band parts, according to a detection result of the orientation detecting portion and the state information received at the receiving portion.