A flexible circuit board includes: an insulative tape having a pair of long sides and a pair of short sides; a driving IC mounted on the insulative tape; an input terminal for receiving data signals and control signals to be sent to the driving IC; a first output terminal for outputting a signal from the driving IC; a second output terminal for outputting at least some of the data signals and control signals; and first and second power signal terminals for supplying a voltage to the driving IC, wherein the input terminal, the first output terminal, and the second output terminal are provided on one of the pair of long sides, the first power signal terminal being provided on one of the pair of short sides, and the second power signal terminal being provided on the other one of the pair of short sides.