Disclosed is a flat panel display device which comprises a power supply unit provided on a first PCB and supplying the power; an image driver provided on a second PCB and controlling predetermined images to be displayed; and a signal processor provided on a third PCB, connected to the image driver via a differential signal interface, converting the image signals provided from the outside into a format of signals that fits the flat panel display panel, and providing the converted signals to the image driver. The present invention reduces the EMI.