A flexible display panel includes a first display region that is flat, second display regions located at both sides of the first display region and curved by a predetermined angle, a plurality of pixels formed in the first display region, and a plurality of pixels formed in the second display regions, Each of the plurality of pixels formed in the first display region and the second display regions includes a light-emitting diode and a driving thin-film transistor (TFT) connected to the light-emitting diode, the driving TFT supplying a driving current to the light-emitting diode. A size of the driving TFT varies for each of the plurality of pixels formed in the second display regions so that driving currents supplied by driving TFTs in the second display regions vary in one direction with respect to boundaries between the first display region and the second display regions.