The present invention provides a correction system (1) in which a control circuit (40) of a display panel (2) generates unevenness correction data to be used for correcting display unevenness. The correction system includes a signal source (11), an imaging device (12), and a control device (13). The signal source outputs a signal for displaying a prescribed reference image on the display panel. The imaging device captures the reference image displayed on the display panel on the basis of the signal from the signal source and generates a captured image. The control device generates unevenness correction data for the display panel on the basis of the captured image. The control device generates unevenness correction data (51, 52) having a plurality of mutually different formats (F1, F2) for the display panel (S15A, S15B), and records the same in a storage unit (21) of the display panel (S16).