An image signal processing circuit includes: a display panel including a first dummy pixel provided outside an effective pixel region; a current detection section configured to detect a change in a current in the first dummy pixel; a modification processing section configured to modify a predetermined predicted degradation value, based on an actual degradation amount of the current detected by the current detection section; and a correction processing section configured to correct an image signal, based on the predicted degradation value modified by the modification processing section, the image signal being adapted to drive an effective pixel.
