In order to attain an object to provide a display device capable of suppressing electric power consumption as well as displaying an image with excellent quality, a control device includes a control information output section (36) for, in a case where an image determining section (35) determines that an image is a flickering image, supplying, to a grayscale level control section (80), grayscale level control information for causing the grayscale level control section to carry out control for increasing or lowering a grayscale level of a pixel in which flicker is easily recognizable.